30 includes an elastic contact point 35. The elastic contact point 35 is formed at the bent end portion of the elastic contact arm 34. The elastic contact point 35 faces outward in the front-rear direction. The first contact 30 also includes a contact point 36 formed at the curved portion 33. The contact point 36 protrudes so as to oppose the elastic contact point 35 in the front-rear direction.

Each first metal fitting 40a is formed of a thin plate of an arbitrary metal so as to have a shape illustrated in FIG. 4 using progressive metal forming (stamping). The first metal fitting 40a as a whole has a crank-like shape. More specifically, the first metal fitting 40a includes a hook portion 42a, a first base portion 41a, and a second base portion 43a (to be described later), and these portions integrally form the crank-like shape as a whole. The first base portion 41a and the second base portion 43a integrally form the crank-like shape as a whole. The first metal fitting 40a is formed in a manufacturing step including drawing in such a manner that the surfaces of a first base portion 41a that face upward or in the front-rear or right-left direction can be connected together seamlessly. The method of forming the first metal fitting 40a is not limited to this but may include, for example, a step of bending in the thickness direction in addition to, or in place of, the step including drawing.

The first metal fitting 40a includes the first base portion 41a. The first base portion 41a extends upward while inclining inward in the right-left direction. The first base portion 41a is subsequently bent at the top end thereof and extend further toward one side in the right-left direction. The first base portion 41a connects the second base portion 43a and the hook portion 42a (to be described later) together.

The first metal fitting 40a includes the hook portion 42a. The first base portion 41a has the portion that extends toward the above-described one side in the right-left direction, and the hook portion 42a extends further toward the one side from the portion of the first base portion 41a. The hook portion 42a is shaped like the letter L. The hook portion 42a has a tip end 42a1, and the tip end 42a1 is, for example, bent downward from an end of the hook portion 42a, the end facing the one side. The width of the hook portion 42a in the front-rear direction is smaller than the width of any other portion of the first metal fitting 40a. In other words, the width of the hook portion 42a in the front-rear direction is smaller, for example, than the width of the first base portion 41a that adjoins the hook portion 42a. The width of the hook portion 42a in the front-rear direction is smaller, for example, than the width of the second base portion 43a or the width of a narrow portion 44a (to be described later).

The first metal fitting 40a includes the second base portion 43a that extends straight toward the other side in the right-left direction from the bottom end of the first base portion 41a. In the front-rear direction, the width of the second base portion 43a is smaller than the width of the first base portion 41a that adjoins the second base portion 43a.

The first metal fitting 40a includes a narrow portion 44a in the second base portion 43a. The narrow portion 44a is shaped so as to be narrower than any other portion of the second base portion 43a in the front-rear direction. The narrow portion 44a, which is part of the second base portion 43a, extends outward in the right-left direction from a portion of the second base portion 43a adjoining the first base portion 41a. As illustrated in FIG. 6 (to be described later), the first metal fitting 40a includes a mount portion 45a. The mount portion 45a includes a bottom surface of a longitudinal end portion of the narrow portion 44a of the second base portion 43a, the bottom surface facing the circuit substrate CB1. The mount portion 45a, however, is not limited to this. In addition to the bottom surface of the narrow portion 44a, the mount portion 45a may further include the side surfaces of the narrow portion 44a, the side surfaces extending in the up-down direction, and the top surface of the narrow portion 44a.

FIG. 6 is an enlarged view illustrating the region V surrounded by the dash-dot line in FIG. 3, in which the first metal fitting 40a only is illustrated. Referring to FIG. 6, the structure of the first base portion 41a of the first metal fitting 40a is described in detail in relation to corresponding portions of the engagement projection 22 in FIG. 5.

The first metal fitting 40a includes a first end portion 41a1. The first end portion 41a1 is disposed at the first intersection portion R1 of the engagement projection 22, at which the first face 221, the second face 222, and the fourth face 224 intersect, so as to cover part of the first face 221, part of the second face 222, and part of the fourth face 224. The first end portion 41a1 is a rear corner portion of the first base portion 41a and has a round shape as a whole. The first end portion 41a1 is an upper-rear corner portion of the first metal fitting 40a.

The first metal fitting 40a includes a second end portion 41a2. The second end portion 41a2 is disposed at the second intersection portion R2 of the engagement projection 22, at which the first face 221, the third face 223, and the fourth face 224 intersect, so as to cover part of the first face 221, part of the third face 223, and part of the fourth face 224. The second end portion 41a2 is a front corner portion of the first base portion 41a and has a round shape as a whole. The second end portion 41a2 is an upper-front corner portion of the first metal fitting 40a.

The first metal fitting 40a includes a first projected portion 41a3. The first projected portion 41a3 is a boundary region that extends in the longitudinal direction from the first end portion 41a1 along the first intersection line L1 between the first face 221 and the second face 222. The first projected portion 41a3 is formed so as to have a cross section shaped like the letter L as viewed in the right-left direction. The first projected portion 41a3 is a bent portion formed from the top surface to the rear surface of the first base portion 41a.

The first metal fitting 40a includes a second projected portion 41a4. The second projected portion 41a4 is a boundary region that extends in the longitudinal direction from the second end portion 41a2 along the second intersection line L2 between the first face 221 and the third face 223. The second projected portion 41a4 is formed so as to have a cross section shaped like the letter L as viewed in the right-left direction. The second projected portion 41a4 is a bent portion formed from the top surface to the front surface of the first base portion 41a.

The first metal fitting 40a includes a third projected portion 41a5. The third projected portion 41a5 is a boundary region that extends from the first end portion 41a1 toward the side opposite to the engagement side along the third intersection line L3 between the second face 222 and the fourth face 224. The third projected portion 41a5 is formed so as to have a cross section shaped like the letter L as viewed from above. The third projected portion 41a5 is a bent portion formed from the side surface facing in the right-left direction to the rear surface of the first base portion 41a.

The first metal fitting 40a includes a fourth projected portion 41a6. The fourth projected portion 41a6 is a boundary region that extends from the second end portion 41a2 toward the side opposite to the engagement side along the fourth intersection line L4 between the third face 223 and the fourth face 224. The fourth projected portion 41a6 is formed so as to have a cross section shaped like the letter L as viewed from above. The fourth projected portion 41a6 is a bent portion formed from the side surface facing in the right-left direction to the front surface of the first base portion 41a.

The first metal fitting 40a includes a fifth projected portion 41a7. The fifth projected portion 41a7 is a boundary region that extends between the first end portion 41a1 and the second end portion 41a2 along the fifth intersection line L5 between the first face 221 and the fourth face 224. The fifth projected portion 41a7 is formed so as to have a cross section shaped like the letter L as viewed in the front-rear direction. The fifth projected portion 41a7 is a bent portion formed from the top surface of the first base portion 41a to the side surface facing in the right-left direction.

The first metal fitting 40a has a first flat surface S1 disposed along the first face 221, a second flat surface S2 disposed along the second face 222, a third flat surface S3 disposed along the third face 223, and a fourth flat surface S4 disposed along the fourth face 224.

The first flat surface S1 is the top surface of the first metal fitting 40a. The first flat surface S1 adjoins the front edge of the first projected portion 41a3, the edge of the fifth projected portion 41a7 positioned in the right-left direction, and the rear edge of the second projected portion 41a4. The second flat surface S2 is the rear surface of the first metal fitting 40a. The second flat surface S2 adjoins the lower edge of the first projected portion 41a3 and the edge of the third projected portion 41a5 positioned in the right-left direction.

The third flat surface S3 is the front surface of the first metal fitting 40a. The third flat surface S3 adjoins the lower edge of the second projected portion 41a4 and the edge of the fourth projected portion 41a6 positioned in the right-left direction. The fourth flat surface S4 is the side surface of the first metal fitting 40a facing in the right-left direction. The fourth flat surface S4 adjoins the front edge of the third projected portion 41a5, the lower edge of the fifth projected portion 41a7, and the rear edge of the fourth projected portion 41a6.

In the longitudinal end portion of the engagement projection 22, the first metal fitting 40a seamlessly covers the first face 221, the second face 222, the third face 223, the fourth face 224, and all the intersection lines therebetween, with surfaces of the first metal fitting 40a, the surfaces orthogonally intersecting the thickness direction of the first metal fitting 40a. The first base portion 41a of the first metal fitting 40a is shaped such that the first flat surface S1, the second flat surface S2, the third flat surface S3, and the fourth flat surface S4 are connected together seamlessly and smoothly by the end portions and the projected portions. The first metal fitting 40a having such a shape can be formed by drawing.

Each second metal fitting 40b is formed of a thin plate of an arbitrary metal so as to have a shape illustrated in FIG. 4 using progressive metal forming (stamping). The second metal fitting 40b is formed in a manufacturing step including drawing in such a manner that an outer peripheral surface 47b2, an inner peripheral surface 47b1, and a top surface of the second metal fitting 40b (which are described later) are connected to each other and extend seamlessly in the front-rear and right-left directions. The method of forming the second metal fitting 40b is not limited to this but may include, for example, a step of bending in the thickness direction in addition to, or in place of, the step including drawing.

The second metal fitting 40b includes a first base portion 41b that extends in the front-rear direction. The second metal fitting 40b also includes second base portions 42b that protrude toward the above-described one side in the right-left direction from respective opposite ends of the first base portion 41b in the front-rear direction. The first base portion 41b and the second base portions 42b are included in a peripheral portion 40b1. The peripheral portion 40b1 extends in the front-rear and right-left directions and constitutes part of the outer periphery of the second metal fitting 40b.

The second metal fitting 40b includes protruding portions 43b that protrude straight downward from respective front and rear portions of the first base portion 41b. A lower part of each protruding portion 43b is projected outward in the right-left direction. A pair of the protruding portions 43b, which are spaced in the front-rear direction, have respective edges that oppose each other. These edges of the protruding portions 43b and a lower edge of the first base portion 41b form a recess. The second metal fitting 40b includes first mount portions 44b positioned at the bottom ends of respective protruding portions 43b.

The second metal fitting 40b includes a pair of installation portions 45b. The installation portions 45b are positioned at respective ends of the second base portions 42b, the respective ends facing the one side in the right-left direction. The installation portions 45b are spaced from each other in the transverse direction of the connector 10. The installation portions 45b protrude further toward the one side in the right-left direction from the ends of respective second base portions 42b, the ends facing the one side in the right-left direction.

Each installation portion 45b extends in the right-left direction and has a crank-like bent portion being bent inward in the front-rear direction. An end portion of the installation portion 45b facing the one side in the right-left direction is shaped so as to be wider in the up-down direction compared with the other part of the installation portion 45b.

The second metal fitting 40b includes a curved portion 46b. The curved portion 46b is shaped like the letter U and protrudes inward in the second metal fitting 40b. The curved portion 46b adjoins the first base portion 41b substantially over the entire length of the first base portion 41b. The curved portion 46b also adjoins a part of each second base portion 42b, the part positioned closer to the other side in the right-left direction. The second metal fitting 40b includes an inner peripheral surface 47b1 that adjoins the curved portion 46b from inside and is formed seamlessly in the front-rear and right-left directions. The second metal fitting 40b includes an outer peripheral surface 47b2 that is formed seamlessly in the front-rear and right-left directions from one of the installation portions 45b to the other. The outer peripheral surface 47b2 includes the outer surfaces of the first base portion 41b and the second base portions 42b. The outer peripheral surface 47b2 is formed such that these outer surfaces are connected to each other smoothly and seamlessly without having a gap therebetween. The outer peripheral surface 47b2 is formed continuously so as to extend in the longitudinal direction from one of the installation portions 45b, bend and further extend in the transverse direction, and bend again and extend in the longitudinal direction to the other installation portion 45b.

The second metal fitting 40b includes contact arms 48b each shaped like the letter U. Each contact arm 48b adjoins a portion of each second base portion 42b, the portion positioned closer to the one side in the right-left direction. Each contact arm 48b has a portion extending inward in the front-rear direction and having spring elasticity. The second metal fitting 40b includes second mount portions 49b positioned at bottom ends of outside portions of respective second base portions 42b, the outside portions facing outward in the front-rear direction. Each second mount portion 49b extends substantially over the entire length of the second base portion 42b in the right-left direction.

FIG. 7 is an enlarged view illustrating the region V surrounded by the dash-dot line in FIG. 3. FIG. 8 is an enlarged view illustrating the connector 10 of FIG. 7 as viewed from below.

Each first contact 30 is press-fitted into the first insulator 20 from below. In this state, the locking portion 32 of the first contact 30 is locked between inside surfaces of each first-contact mounting groove 24, the inside surfaces facing each other in the right-left direction. The first contact 30 is thereby held in the first-contact mounting groove 24. Multiple first contacts 30 are mounted in the outer walls 23 of the first insulator 20.

When each first contact 30 is held in the corresponding first-contact mounting groove 24 of the first insulator 20, the elastic contact point 35 and the contact point 36 project from the first-contact mounting groove 24 into the space between the engagement projection 22 and the corresponding outer wall 23. The elastic contact arm 34 of the first contact 30 is elastically deformable in the front-rear direction inside the first-contact mounting groove 24. The tip end of each mount portion 31 is positioned so as to be substantially flush with the outer wall 23 in the front-rear direction.

As illustrated in FIGS. 7 and 8, the first metal fitting 40a and the second metal fitting 40b are separate members. The first metal fitting 40a is spaced from the second metal fitting 40b. In the separated state, the first metal fitting 40a opposes the second metal fitting 40b in the right-left direction. The first metal fitting 40a and the second metal fitting 40b have different strengths. In other words, the strength of one of the first metal fitting 40a and the second metal fitting 40b is greater than the strength of the other. For example, the strength of the first metal fitting 40a can be greater than that of the second metal fitting 40b. For example, the strength of the material of the first metal fitting 40a can be greater than that of the material of the second metal fitting 40b. For example, the term “strength” as used herein includes tensile strength.

The first metal fitting 40a and the second metal fitting 40b may be made of different materials. For example, the material of the first metal fitting 40a can be stainless steel, and the material of the second metal fitting 40b can be phosphor bronze. The materials are not limited to the above. The material of the first metal fitting 40a and the material of the second metal fitting 40b may be selected arbitrarily from a group of material candidates so as to satisfy the condition that the strength of the first metal fitting 40a is greater than the strength of the second metal fitting 40b. The term “group of material candidates” include, for example, stainless steel, phosphor bronze, iron, Corson copper, copper titanium, beryllium copper, and aluminum.

The first metal fitting 40a can be made of the same type of material as that of the second metal fitting 40b insofar as the strength of the first metal fitting 40a is greater than the strength of the second metal fitting 40b. Even if the first metal fitting 40a and the second metal fitting 40b are made of the same type of alloy, such as phosphor bronze, the strength of the first metal fitting 40a can be made greater than that of the second metal fitting 40b if, for example, the number, type, or quality of the alloy is different. For example, even if the first metal fitting 40a and the second metal fitting 40b are made of the same type of material, such as phosphor bronze, the thickness of the first metal fitting 40a can be made greater than that of the second metal fitting 40b, which increases the strength of the first metal fitting 40a relative to that of the second metal fitting 40b (to be described later).

For example, the strength of the first contact 30 can be substantially the same as that of the second metal fitting 40b. The strength of the first metal fitting 40a can be greater than those of the second metal fitting 40b and the first contact 30. The materials of the first metal fitting 40a, the second metal fitting 40b, and the first contact 30 may be selected arbitrarily from the group of material candidates so as to satisfy the above strength relations among the first metal fitting 40a, the second metal fitting 40b, and the first contact 30.

The first metal fittings 40a are attached to respective ends of the engagement projection 22, the ends being positioned oppositely in the longitudinal direction of the connector 10. Each first metal fitting 40a extends in the longitudinal direction of the connector 10 from the engagement projection 22 to the corresponding first base portion 41b of the second metal fitting 40b.

For example, each first metal fitting 40a is embedded integrally in the corresponding first-metal-fitting holding portion 25 of the first insulator 20 using insert molding. Here, the first base portion 41a is embedded integrally in an end portion of the engagement projection 22, the end portion being positioned in the right-left direction, so as to extend from the top surface to the side surfaces of the end portion. The first base portion 41a is formed integrally in the first-metal-fitting holding portion 25. The first base portion 41a covers each end portion of the engagement projection 22 entirely from outside, each end portion being positioned in the right-left direction.

More specifically, the first end portion 41a1 covers the first intersection portion R1. The second end portion 41a2 covers the second intersection portion R2. The first projected portion 41a3 covers the first intersection line L1 and the boundary region of the first intersection line L1 in the first face 221 and the second face 222. The second projected portion 41a4 covers the second intersection line L2 and the boundary region of the second intersection line L2 in the first face 221 and the third face 223. The third projected portion 41a5 covers the third intersection line L3 and the boundary region of the third intersection line L3 in the second face 222 and the fourth face 224. The fourth projected portion 41a6 covers the fourth intersection line L4 and the boundary region of the fourth intersection line L4 in the third face 223 and the fourth face 224. The fifth projected portion 41a7 covers the fifth intersection line L5 and the boundary region of the fifth intersection line L5 in the first face 221 and the fourth face 224. The first flat surface S1, the second flat surface S2, the third flat surface S3, and the fourth flat surface S4 cover the first face 221, the second face 222, the third face 223, and the fourth face 224, respectively.

The first flat surface S1 of the first base portion 41a is flush with the top surface of the engagement projection 22. The second flat surface S2 and the third flat surface S3 of the first base portion 41a are flush with respective side surfaces of the engagement projection 22. The first flat surface S1 of the first base portion 41a is not limited to this. The first flat surface S1 of the first base portion 41a does not need to be flush with the top surface of the engagement projection 22. For example, the first flat surface S1 of the first base portion 41a may be positioned below the top surface of the engagement projection 22. The second flat surface S2 and the third flat surface S3 of the first base portion 41a do not need to be flush with respective side surfaces of the engagement projection 22. For example, the second flat surface S2 and the third flat surface S3 of the first base portion 41a may be positioned further inside from the corresponding side surfaces of the engagement projection 22 in the right-left direction.

The hook portion 42a is embedded integrally in the engagement projection 22 at the top surface thereof in such a manner that the tip end 42a1 of the hook portion 42a is embedded in the engagement projection 22. The top surface of the hook portion 42a is exposed from the first insulator 20. For example, the top surface of the hook portion 42a is positioned so as to be flush with the top surface of the engagement projection 22. The top surface of the hook portion 42a is not limited to this but may be positioned below the top surface of the engagement projection 22.

The second base portion 43a of the first metal fitting 40a is entirely exposed from the first insulator 20 in the region R. The second base portion 43a extends from the engagement projection 22 to the first base portion 41b of the second metal fitting 40b. The end portion of the second base portion 43a including the mount portion 45a is positioned directly below the first base portion 41b of the second metal fitting 40b. In the region R, the second base portion 43a is surrounded by the peripheral portion 40b1 of the second metal fitting 40b from both sides in the front-rear direction and from the outside in the right-left direction.

The mount portion 45a of the first metal fitting 40a to be attached to the circuit substrate CB1 includes the bottom surface of the second base portion 43a that faces the circuit substrate CB1. For example, the mount portion 45a has an area extending in the front-rear and right-left directions on the bottom surface of the second base portion 43a. The mount portion 45a is positioned directly below the first base portion 41b of the second metal fitting 40b in the right-left direction. The mount portion 45a is positioned between the first mount portions 44b of the second metal fitting 40b in the front-rear direction.

Each second metal fitting 40b is attached to the end portions E of the outer walls 23 located in the longitudinal direction. More specifically, each installation portion 45b of the second metal fitting 40b is attached to the corresponding end portion E of each outer wall 23. The installation portion 45b is embedded integrally in the corresponding end portion E of the outer wall 23 of the first insulator 20 using insert molding. Thus, each second metal fitting 40b is held by the second-metal-fitting holding portions 26 of the first insulator 20. In the second metal fitting 40b, a recess is defined by the lower edge of the first base portion 41b and by the mutually opposing edges of respective protruding portions 43b that are spaced in the front-rear direction. The mount portion 45a of the first metal fitting 40a is positioned in the recess.

After each second metal fitting 40b is held by the second-metal-fitting holding portions 26 of the first insulator 20, the peripheral portion 40b1 of the second metal fitting 40b serves as the periphery of the connector 10 in the region R. In the region R, the periphery of the connector 10 is formed only by the second metal fitting 40b. In the region R, a front part of the second base portion 42b, which extends in the right-left direction from the end portion E of the front outer wall 23, serves as a front part of the periphery extending in the right-left direction of the connector 10. In the region R, the first base portion 41b, which extends in the front-rear direction, serves as the periphery extending in the front-rear direction of the connector 10. In the region R, a rear part of the second base portion 42b, which extends in the right-left direction from the end portion E of the rear outer wall 23, serves as a rear part of the periphery extending in the right-left direction of the connector 10. In the region R, only the second metal fitting 40b is present, and the first insulator 20 is not formed.

The peripheral portion 40b1 of the second metal fitting 40b has a dual-wall structure extending along peripheral sides of the connector 10 in the region R. For example, the peripheral portion 40b1 is formed such that a pair of inside and outside walls, which are connected by the curved portion 46b, extend in the front-rear and right-left directions continuously in parallel with each other. The inner peripheral surface 47b1 formed on the inside wall of the peripheral portion 40b1 and the outer peripheral surface 47b2 formed on the outside wall of the peripheral portion 40b1 extend in the front-rear and right-left directions continuously in parallel with each other. For example, in the peripheral portion 40b1, each contact arm 48b, which is shaped like the letter U, includes a pair of inside and outside walls, and the inside and outside walls extend in the right-left direction in parallel with each other.

The second base portion 43a of the first metal fitting 40a is surrounded by the peripheral portion 40b1 of the second metal fitting 40b from both sides in the front-rear direction and from the outside in the right-left direction. More specifically, the second base portions 42b of the peripheral portion 40b1 of the second metal fitting 40b are disposed at both sides of the second base portion 43a of the first metal fitting 40a in the front-rear direction. The first base portion 41b, the protruding portions 43b, and the curved portion 46b of the peripheral portion 40b1 are disposed so as to superpose the end portion of the second base portion 43a of the first metal fitting 40a in the right-left direction. Each contact arm 48b of the second metal fitting 40b includes an elastically deformable portion that is positioned inside in the front-rear direction and extends downward and is deformable in the front-rear direction.

The first mount portions 44b of the second metal fitting 40b are disposed side-by-side in the transverse direction of the connector 10. The first mount portions 44b are positioned respectively at both sides of the second base portion 43a of the first metal fitting 40a in the transverse direction of the connector 10. A pair of the first mount portions 44b are positioned so as to straddle the second base portion 43a of the first metal fitting 40a in the front-rear direction. More specifically, the first mount portions 44b are positioned so as to straddle the mount portion 45a of the second base portion 43a in the front-rear direction, the mount portion 45a being positioned at the end of the second base portion 43a in the right-left direction. For example, the first mount portions 44b are disposed respectively at symmetrical positions in the front-rear direction with respect to the mount portion 45a of the second base portion 43a of the first metal fitting 40a.

The second mount portions 49b of the second metal fitting 40b are disposed so as to extend in the longitudinal direction of the connector 10. The second mount portions 49b are positioned respectively at both sides of the second base portion 43a of the first metal fitting 40a in the transverse direction of the connector 10. A pair of the second mount portions 49b are positioned so as to straddle the second base portion 43a of the first metal fitting 40a in the front-rear direction. For example, the second mount portions 49b are disposed respectively at symmetrical positions in the front-rear direction with respect to the narrow portion 44a of the second base portion 43a. In the right-left direction, the second mount portions 49b are disposed substantially at the same positions as that of the second base portion 43a that includes the mount portion 45a and the narrow portion 44a.

In the connector 10 with the above-described structure, the mount portions 31 of respective first contacts 30 are soldered to patterned traces formed on the mount surface of the circuit substrate CB1. The mount portion 45a of each first metal fitting 40a, and the first mount portions 44b and the second mount portions 49b of each second metal fitting 40b are soldered to corresponding patterned traces formed on the mount surface. Thus, the mount portions are fixed to the circuit substrate CB1, and the connector 10 is thereby mounted onto the circuit substrate CB1. For example, electronic components other than the connector 10, such as a central processing unit (CPU), a controller, and a memory, are also mounted on the mount surface of the circuit substrate CB1.

The following describes the structure of the connection object 50 with reference mainly to FIG. 9.

FIG. 9 is a perspective view, as viewed from above, illustrating the exterior of the connection object 50 of FIG. 1. The connection object 50 can be obtained, for example, by forming the second insulator 60 integrally with the second contacts 70 using insert molding, and the metal fittings 80 are press-fitted into the second insulator 60 from above.

The second insulator 60 is a plate-like member elongated in the right-left direction. The second insulator 60 is made of a synthetic resin having insulating and heat-resisting properties using injection molding. The second insulator 60 includes a bottom plate 61 that constitutes the bottom part of the second insulator 60. The second insulator 60 includes annularly formed peripheral walls 62 that protrude upward from peripheral portions of the bottom plate 61, the peripheral portions extending in the front-rear and right-left directions. The peripheral walls 62 include transverse walls 62a and longitudinal walls 62b. The transverse walls 62a extend in the front-rear direction. The longitudinal walls 62b extend in the right-left direction. The second insulator 60 includes an engagement recess 63 surrounded by the peripheral walls 62 in the front-rear direction and in the right-left direction.

The second insulator 60 includes second-contact holding portions 64 each of which is formed continuously in each longitudinal wall 62b and in the bottom plate 61. The second contacts 70 are mounted in respective second-contact holding portions 64. The second insulator 60 includes metal-fitting holding portions 65 formed in respective transverse walls 62a. The metal fittings 80 are attached to respective metal-fitting holding portions 65.

Each second contact 70 having a shape as illustrated is formed, for example, of a thin plate made of a copper alloy, such as phosphor bronze, beryllium copper, or copper-titanium alloy, or of a Corson system copper alloy, using progressive metal forming (stamping). The surface of the second contact 70 is plated with nickel to form a foundation layer and further plated with gold or tin thereover.

The second contact 70 includes a mount portion 71 that is an L-shaped protrusion protruding outward in the front-rear direction. The second contact 70 includes a curved portion 72 that is shaped like the letter U. The curved portion 72 protrudes upward from the mount portion 71. The second contact 70 includes a pair of contact points 73 that are formed on respective side surfaces of the second contact 70, the side surfaces facing in the front-rear direction and being positioned at both sides of the curved portion 72.

Each second contact 70 is embedded integrally in a corresponding second-contact holding portion 64 of the second insulator 60 using insert molding. A pair of the contact points 73 are disposed respectively at the front surface and at the rear surface of each longitudinal wall 62b. The mount portion 71 protrude outward through the bottom plate 61 and further extend outward in the front-rear direction. The tip end of the mount portion 71 is positioned outside the longitudinal wall 62b in the front-rear direction.

Each metal fitting 80 is formed of a thin plate of an arbitrary metal so as to have a shape as illustrated, using progressive metal forming (stamping). The method of manufacturing the metal fitting 80 includes a step of punching out a piece and a step of bending the punched piece in the thickness direction.

The metal fitting 80 includes a base portion 81 shaped tabularly. The metal fitting 80 includes first extension portions 82 that are shaped like the letter L. In the right-left direction, one of the first extension portions 82 extends outward from the outside edge of the base portion 81, and the other one extends inward from the inside edge of the base portion 81. The metal fitting 80 includes second extension portions 83 that extend outward from respective opposite ends of the base portion 81 in the front-rear direction. Each second extension portion 83 is shaped like the letter L. The metal fitting 80 includes contact points 84 that are formed at respective outside surfaces of the second extension portions 83, the outside surfaces facing in the front-rear direction. The metal fitting 80 includes mount portions 85 positioned at the bottom ends of the second extension portions 83 and the outward-facing first extension portion 82. Each metal fitting 80 is attached to the second insulator 60 with the first extension portions 82 and the second extension portions 83 being fitted in each metal-fitting holding portion 65 of the second insulator 60.

In the connection object 50 with the above-described structure, the mount portions 71 of respective second contacts 70 are soldered to patterned traces formed on the mount surface of the circuit substrate CB2. The mount portions 85 of the metal fittings 80 are soldered to patterned traces formed on the mount surface. Thus, the connection object 50 is mounted on the circuit substrate CB2. For example, electronic components other than the connection object 50, such as a communication module, are also mounted on the mount surface of the circuit substrate CB2.

With reference to FIGS. 10 to 12, the following description focuses on the structure of the connector module 1 in the engagement state in which the connector 10 and the connection object 50 are connected together and the first insulator 20 and the second insulator 60 engage each other. FIG. 10 is a cross-sectional view of the connector module 1 taken along line X-X in FIG. 1.

For example, the orientation of the connection object 50 illustrated in FIG. 9 is first reversed upside down. In this state, the connection object 50 is positioned so as to oppose the connector 10 while the connector 10 and the connection object 50 are substantially aligned with each other in the front-rear and right-left directions. The connection object 50 is subsequently moved downward. The connection object 50 and the connector 10 are thereby connected to each other, in other words, the connector module 1 is in the connection state. Here, the engagement projection 22 of the first insulator 20 engages the engagement recess 63 of the second insulator 60.

In the engagement state, the elastic contact point 35 of each first contact 30 comes into contact with a corresponding contact point 73 of each second contact 70, and the elastic contact arm 34 having the spring elasticity is elastically deformed inward in the front-rear direction. In the engagement state, the contact point 36 of the first contact 30 comes into contact with the other contact point 73 of the second contact 70. The first contact 30 comes into contact with the second contact 70 at two points in the front-rear direction, in other words, at a point between the elastic contact point 35 and one of the contact points 73 and at another point between the contact point 36 and the other contact point 73.

FIG. 11 is a cross-sectional view of the connector module 1 taken along line XI-XI in FIG. 1.

In the engagement state, the contact arms 48b of each second metal fitting 40b come into contact with the corresponding contact points 84 of each metal fitting 80. Here, the contact arms 48b having the spring elasticity deform elastically outward in the front-rear direction. The second metal fitting 40b and the metal fitting 80 come into contact with each other at two points in the front-rear direction using the contact arms 48b and the contact points 84.

The top surface of the second base portion 43a of the first metal fitting 40a opposes the base portion 81 of the metal fitting 80 in the up-down direction. The top surface of the second base portion 43a and the base portion 81 are spaced from each other in the up-down direction. Accordingly, even if solder reaches the top surface of the second base portion 43a, the solder is accommodated in the space between the top surface of the second base portion 43a and the base portion 81 of the metal fitting 80. This reduces the occurrence of poor engagement between the connector 10 and the connection object 50. This can avoid the occurrence of the situation in which the connector 10 does not engage the connection object 50 properly due to the presence of residual solder.

As illustrated in FIG. 8, the first insulator 20 is not present around the mount portion 45a, which enables the amount of solder to be increased at the mount portion 45a. This increases the mounting strength of the connector 10 mounted on the circuit substrate CB1. For example, this enables side fillets of solder to be formed at the mount portion 45a. This further increases the mounting strength of the connector 10 mounted on the circuit substrate CB1. Accordingly, the sturdiness of the connector 10 improves.

FIG. 12 is a cross-sectional view of the connector module 1 taken along line XII-XII in FIG. 1.

Each metal fitting 80 of the connection object 50 is positioned between the corresponding first metal fitting 40a and the corresponding second metal fitting 40b in the engagement state in which the connector 10 and the connection object 50 engage each other. The metal fitting 80 is positioned between the first metal fitting 40a and the second metal fitting 40b in the longitudinal direction of the connector 10. In the engagement state, the second base portion 43a of the first metal fitting 40a is disposed so as to oppose the base portion 81 of the metal fitting 80 in the up-down direction with a space therebetween. In the engagement state, the inner peripheral surface 47b1 of the second metal fitting 40b is disposed so as to oppose the outward-facing first extension portion 82 of the metal fitting 80 in the right-left direction. In the engagement state, the first base portion 41a of the first metal fitting 40a is disposed so as to oppose the inward-facing first extension portion 82 of the metal fitting 80 in the right-left direction.

Multiple first contacts 30 are arranged in a row in the arrangement direction, which is parallel to the longitudinal direction of the connector 10. In the arrangement direction, each first metal fitting 40a superposes a one first contact 30 positioned at each end of the row. For example, as illustrated in FIG. 7, the hook portion 42a of the first metal fitting 40a superposes the one first contact 30 positioned at the end in the arrangement direction. For example, a part of the hook portion 42a, the part extending in the right-left direction, comes to the position of the one first contact 30 in the right-left direction.

As illustrated in FIG. 12, the tip end 42a1 of the hook portion 42a of the first metal fitting 40a is positioned, in the arrangement direction, between the one first contact 30 and an adjacent first contact 30 disposed next to the one first contact 30. For example, another part of the hook portion 42a, another part extending in the right-left direction, is also positioned, together with the tip end 42a1 extending in the up-down direction, between the one first contact 30 and the adjacent first contact 30 positioned next to the one first contact 30 in the arrangement direction.

In FIG. 12, the thickness of each first metal fitting 40a is substantially equal to or smaller than the thickness of the second metal fitting 40b. The thickness of the first metal fitting 40a, however, can be made greater than the thickness of the second metal fitting 40b in order to increase the strength of the first metal fitting 40a relative to the second metal fitting 40b, for example, in a case where the first metal fitting 40a and the second metal fitting 40b are made of the same material.

According to the connector 10 of the embodiment described above, the occurrence of the malfunction of the connector 10 caused by the first insulator 20 can be reduced even if the size and height of the connector 10 are reduced. The peripheral portion 40b1 of the second metal fitting 40b is positioned at each longitudinal end of the connector 10 and constitutes the periphery of the connector 10 in each region R positioned outside the corresponding end portions E of the outer walls 23. In the region R, only the peripheral portion 40b1 is present without other members being present. Accordingly, this eliminates the necessity of mounting the peripheral portion 40b1 of the second metal fitting 40b onto the longitudinal end portion of the first insulator 20, which is required in the related art. Because the first insulator 20 is not present in the region R where the peripheral portion 40b1 is positioned, a problem such as the abrasion of the first insulator 20 does not occur at all in the region R. Accordingly, the occurrence of such a problem of the first insulator 20 can be reduced, which thereby reduces the occurrence of a problem of the connector 10 caused by the first insulator 20.

As described above, the first insulator 20 is not present in the region R where the peripheral portion 40b1 is positioned. Accordingly, a problem of the first insulator 20, such as warping or breakage, does not occur at all in the region R even if the first insulator 20 becomes thinner as a result of the size and height of the connector 10 being reduced. This reduces the likelihood of the first insulator 20 having such a problem, which further reduces the likelihood of the connector 10 having related problems caused by the first insulator 20.

In the region R, only the second metal fitting 40b is present, and the first insulator 20 is not present. Accordingly, the abrasion, warping, or breakage of the first insulator 20 cannot occur in the entire region R. This reduces the likelihood of the first insulator 20 having such a problem, which further reduces the likelihood of the connector 10 having related problems caused by the first insulator 20.

In addition, the first insulator 20 is not present in the entire region R, which improves the heat dissipation of the second metal fitting 40b when an electric current flows in the second metal fitting 40b. The second metal fitting 40b does not need to be mounted on the first insulator 20 in the region R, which enables the thickness of the second metal fitting 40b to change more freely even if the size and height of the connector 10 are reduced. For example, this enables the thickness of the second metal fitting 40b to increase in order to increase the cross section through which the electric current flows. Accordingly, the connector 10 enables a large electric current to flow in the second metal fitting 40b.

Because of the first insulator 20 being not present in the entire region R, the longitudinal length of the connector 10 can be reduced by an amount equal to the lengths of respective regions R positioned at opposite longitudinal ends of the connector 10. In a case of the connector 10 being elongated in the longitudinal direction to accommodate a large number of the first contacts 30, the connector 10 becomes more vulnerable to a problem such as warping. The connector 10, however, can be reduced in length as described above, which reduces the occurrence of such a problem.

The outer peripheral surface 47b2 is formed continuously on the peripheral portion 40b1 from one of the installation portions 45b to the other, which improves the strength of the second metal fitting 40b. Accordingly, the sturdiness of the connector 10 can be improved even in the case of the connector 10 being reduced in size and height. This reduces, for example, the occurrence of a problem, such as breakage of the second metal fitting 40b, caused by the connection object 50 during engagement or disengagement between the connector 10 and the connection object 50. This improves the product reliability of the connector 10.

In the peripheral portion 40b1, the inner peripheral surface 47b1 is formed so as to adjoin the curved portion 46b from inside and so as to extend seamlessly in the front-rear and right-left directions, which further improves the strength of the second metal fitting 40b. This further improves the sturdiness of the connector 10 even in the case of the connector 10 being reduced in size and height. This reduces, for example, the occurrence of a problem, such as breakage of the second metal fitting 40b, caused by the connection object 50 during engagement or disengagement between the connector 10 and the connection object 50.

Accordingly, the product reliability of the connector 10 is further improved.

The peripheral portion 40b1 has the dual-wall structure extending along peripheral sides of the connector 10 in the region R, which further improves the strength of the second metal fitting 40b. This further enhances the above-described advantageous effects related to the sturdiness and the product reliability of the connector 10.

The installation portions 45b of the second metal fitting 40b are embedded integrally in the first insulator 20 using insert molding, which increases the holding strength of the first insulator 20 holding the second metal fitting 40b. Accordingly, the second metal fitting 40b can be securely fixed to the first insulator 20 even if the first insulator 20 is not present at the position of the peripheral portion 40b1.

In the connector 10, each first metal fitting 40a includes the first end portion 41a1 disposed at the first intersection portion R1 of the engagement projection 22 and also includes the second end portion 41a2 disposed at the second intersection portion R2 of the engagement projection 22. With this configuration, the connector 10 can reliably protect the intersection portions of the engagement projection 22, which tend to suffer defects, such as wear or breakage, during engagement and disengagement between the connector 10 and the connection object 50. The first metal fitting 40a covers part of the first insulator 20 at each intersection portion of the engagement projection 22, which can improve the sturdiness of the intersection portion of the first insulator 20. This reduces the occurrence of a problem, such as breakage of the engagement projection 22 of the first insulator 20, when the connection object 50 hits the first insulator 20 during engagement or disengagement between the connector 10 and the connection object 50. Accordingly, this reduces the likelihood of broken pieces of the first insulator 20 adhering to the first contacts 30 and leading to poor connection. As a result, the product reliability of the connector 10 is improved.

The first metal fitting 40a includes the first projected portion 41a3, which can protect the first intersection line L1 and the boundary region thereof in the first face 221 and the second face 222. The first metal fitting 40a includes the second projected portion 41a4, which can protect the second intersection line L2 and the boundary region thereof in the first face 221 and the third face 223. Accordingly, the sturdiness of the engagement projection 22 is further improved. This further improves the sturdiness of the first insulator 20. As a result, the advantageous effects related to the sturdiness and the reliability of the connector 10 can be further enhanced.

The first metal fitting 40a includes the third projected portion 41a5, which can protect the third intersection line L3 and the boundary region thereof in the second face 222 and the fourth face 224. The first metal fitting 40a includes the fourth projected portion 41a6, which can protect the fourth intersection line L4 and the boundary region thereof in the third face 223 and the fourth face 224. Accordingly, the sturdiness of the engagement projection 22 is further improved. This further improves the sturdiness of the first insulator 20. As a result, the advantageous effects related to the sturdiness and the reliability of the connector 10 can be further enhanced. For example, the third projected portion 41a5 and the fourth projected portion 41a6 can reduce the occurrence of wear or breakage of the corresponding portions of the engagement projection 22 when the connection object 50 is rotated, in a plane orthogonally intersecting the up-down direction, relative to the connector 10 during and after the engagement between the connector 10 and the connection object 50.

The first metal fitting 40a includes the fifth projected portion 41a7, which can protect the fifth intersection line L5 and the boundary region thereof in the first face 221 and the fourth face 224. Accordingly, the sturdiness of the engagement projection 22 is further improved. This further improves the sturdiness of the first insulator 20. As a result, the advantageous effects related to the sturdiness and the reliability of the connector 10 can be further enhanced. For example, during the engagement between the connector 10 and the connection object 50, the connection object 50 is likely to hit the engagement projection 22 at the fifth intersection line L5 and in the boundary region thereof in the first face 221 and the fourth face 224. The fifth projected portion 41a7 can reduce the occurrence of wear or breakage of the engagement projection 22 in the boundary region along the fifth intersection line L5.

The first metal fitting 40a includes at least one of the first flat surface S1, the second flat surface S2, the third flat surface S3, and the fourth flat surface S4, which can protect at least one of the first face 221, the second face 222, the third face 223, and the fourth face 224. Accordingly, the sturdiness of the engagement projection 22 is further improved. This further improves the sturdiness of the first insulator 20. As a result, the advantageous effects related to the sturdiness and the reliability of the connector 10 can be further enhanced.

The first metal fitting 40a seamlessly covers the first face 221, the second face 222, the third face 223, and the fourth face 224, as well as all the intersection lines therebetween, with surfaces of the first metal fitting 40a, the surfaces orthogonally intersecting the thickness direction of the first metal fitting 40a. Accordingly, the first metal fitting 40a can cover and protect the first insulator 20 without the first insulator 20 being exposed in the longitudinal end portion of the engagement projection 22. The first base portion 41a, which can provide such advantageous effects, is formed using metal drawing. Accordingly, the sturdiness of the engagement projection 22 is further improved. This further improves the sturdiness of the first insulator 20. As a result, the advantageous effects related to the sturdiness and the reliability of the connector 10 can be further enhanced.

The first flat surface S1 of the first base portion 41a is flush with the top surface of the engagement projection 22, and the second flat surface S2 and the third flat surface S3 of the first base portion 41a are flush with respective side surfaces of the engagement projection 22. The surfaces of the first metal fitting 40a and the first insulator 20 are connected together smoothly with no level difference. Accordingly, the sturdiness of the engagement projection 22 is further improved. This further improves the sturdiness of the first insulator 20. As a result, the advantageous effects related to the sturdiness and the reliability of the connector 10 can be further enhanced.

In the connector 10, each first metal fitting 40a attached to the engagement projection 22 and the corresponding second metal fitting 40b attached to the outer walls 23 are separate members. Compared with a known art in which the metal fitting is formed integrally as one piece, this reduces a negative impact caused due to the connection object 50 hitting a metal fitting during engagement. For example, when the connection object 50 hits a metal fitting at the engagement projection 22 or at the outer walls 23, the likelihood of the impact extending to the other metal fitting is reduced. This reduces the occurrence of breakage of the metal fittings such as the first metal fitting 40a and the second metal fitting 40b. The reduction of the occurrence of breakage of the metal fittings leads to a reduction in the occurrence of breakage of the first insulator 20 to which the metal fittings are attached. This improves the product reliability of the connector 10.

Assume that the connector 10 and the connection object 50 engage each other in a misaligned state and that the connection object 50 hits a second metal fitting 40b at the outer walls 23 during the engagement and causes the second metal fitting 40b to deform and incline outward in the right-left direction. Even in this case, the likelihood of the impact extending to the engagement projection 22 is reduced. The deformation of the first metal fitting 40a can be reduced since the first metal fitting 40a and the second metal fitting 40b are separate members. Assume that the connection object 50 hits a first metal fitting 40a at the engagement projection 22 during engagement and causes the first metal fitting 40a and the engagement projection 22 to deform inward into the engagement projection 22 in the right-left direction. Even in this case, the likelihood of the impact extending to the outer walls 23 is reduced. The deformation of the second metal fitting 40b can be reduced since the first metal fitting 40a and the second metal fitting 40b are separate members. Accordingly, the metal fittings behave differently and independently at the engagement projection 22 and at the outer walls 23. The behavior of the metal fitting at the engagement projection 22 does not readily propagate to the metal fitting at the outer walls 23, and vice versa. This reduces the occurrence of the breakage, and the metal fittings can perform expected functions reliably.

The reduction of the occurrence of breakage of the metal fittings and the first insulator 20 reduces the likelihood of displacement of the connector 10 and the connection object 50 relative to each other in the contact arrangement direction, in other words, in the longitudinal direction of the connector 10, during and after the engagement. As a result, electrical continuity between the first contacts 30 and the corresponding second contacts 70 can be achieved exactly as specified in design. The likelihood of the connector module 1 loosening can be also reduced after the engagement. Positioning function of the connector 10 and the connection object 50 relative to each other can be maintained. As a result, the connector 10 and the connection object 50 do not come off easily from each other, which improves the product reliability of the connector module 1.

In the connector 10, the first metal fitting 40a and the second metal fitting 40b are different members, which enables the strength of one of the first metal fitting 40a and the second metal fitting 40b to increase relative to the other. In the connector 10, the first metal fitting 40a and the second metal fitting 40b are attached to different members, such as the engagement projection 22 and the outer walls 23, for the different purposes. The first metal fitting 40a and the second metal fitting 40b can be formed so as to have appropriate strengths suitable for the different positions and purposes. Assume that these metal fittings are formed integrally into one piece as is the case for the known art. When it is necessary to reduce the strength of a portion of the metal fitting at the engagement projection 22 or at the outer walls 23, the strength of the other portion of the metal fitting inevitably decreases.

For example, the first metal fitting 40a attached to the engagement projection 22 is provided for the purpose of improving the sturdiness of the engagement projection 22. On the other hand, the second metal fitting 40b attached to the outer walls 23 is provided mainly for the purpose of electrical connection with the metal fitting 80 in the engagement state. For this purpose, the second metal fitting 40b includes the elastically deformable contact arms 48b.

Accordingly, the second metal fitting 40b is preferably made of a material having a suitable strength to serve as a spring, while the first metal fitting 40a is preferably made of a material that is greater in strength. In the connector 10, the first metal fitting 40a and the second metal fitting 40b can be formed so as to have appropriate strengths suitable for respective purposes. If, for example, the metal fittings are formed integrally into one piece as is the case for the known art, the necessity to form elastically deformable contact arms at respective outer walls leads to a decrease in the overall strength of the metal fitting, which results in a decrease in the sturdiness of the engagement projection.

In the connector 10, however, the material of the first metal fitting 40a is different from that of the second metal fitting 40b. These metal fittings can be formed easily so as to increase the strength of one of the first metal fitting 40a and the second metal fitting 40b relative to the strength of the other. For example, the materials of the first metal fitting 40a and the second metal fitting 40b can be selected appropriately to meet the objectives of these metal fittings.

The first metal fitting 40a, which is made of a material stronger than that of the second metal fitting 40b, improves the sturdiness of the engagement projection 22 to which the first metal fitting 40a is attached. This reduces the occurrence of breakage of the engagement projection 22 of the first insulator 20 to which the first metal fitting 40a is attached. As a result, the product reliability of the connector 10 is improved.

In the case of the first metal fitting 40a having a thickness greater than that of the second metal fitting 40b, the strength of the first metal fitting 40a becomes greater than that of the second metal fitting 40b even if, for example, the first metal fitting 40a and the second metal fitting 40b are made of the same material. With this configuration, the sturdiness of the engagement projection 22 to which the first metal fitting 40a is attached can be also increased. The first metal fittings 40a are attached to respective opposite ends of the

engagement projection 22 in the longitudinal direction of the connector 10, which improves the sturdiness of the engagement projection 22 at both ends. This further reduces the occurrence of breakage of the engagement projection 22 of the first insulator 20 to which the first metal fittings 40a are attached. As a result, the product reliability of the connector 10 is further improved.

In the connector 10, each first metal fitting 40a includes the mount portion 45a to be mounted on the circuit substrate CB1, which improves the sturdiness of the first metal fitting 40a. This reduces the deformation of the first metal fitting 40a even when a load is applied thereto. As a result, the dimensional accuracy and shape integrity of the connector 10 can be maintained during the engagement. This improves, for example, the sturdiness of the engagement projection 22 to which the first metal fitting 40a is attached. This can reduce the occurrence of breakage or deformation of the engagement projection 22 and can reduce the likelihood of the connector 10 loosening or being displaced in the longitudinal direction.

The mount portion 45a includes the bottom surface of the second base portion 43a. The second base portion 43a extends in the longitudinal direction of the connector 10, and the bottom surface faces the circuit substrate CB1. Accordingly, the mount portion 45a can receive the external force acting on the first metal fitting 40a. The mount portion 45a is fixed to the circuit substrate CB1, and the first metal fitting 40a is thereby fixed to the circuit substrate CB1. As a result, even if an external force acts on the first metal fitting 40a, the mount portion 45a can absorb the resulted impact. This improves the sturdiness of the first metal fitting 40a extending in the longitudinal direction of the connector 10. This further improves the sturdiness of the engagement projection 22 extending in the longitudinal direction of the connector 10.

The first metal fitting 40a superposes the one first contact 30 positioned at each end of the row of the first contacts 30 in the arrangement direction, which can reduce the length of the connector 10 in the longitudinal direction. This can reduce the longitudinal length of the connector module 1 and contribute to the overall size reduction of the connector module 1. Moreover, this improves the strength of the connector module 1 against external force.

The tip end 42a1 of the hook portion 42a of the first metal fitting 40a is positioned between the one first contact 30 and the adjacent first contact 30 in the arrangement direction. As a result, an arbitrarily shaped tip end structure of the hook portion 42a is positioned where a first-contact mounting groove 24 is not formed and the first insulator 20 has a larger thickness. This increases the holding strength of the first insulator 20 holding the tip end 42a1 of the hook portion 42a. Consequently, this increases the holding strength of the first insulator 20 holding the first metal fitting 40a. The arbitrarily shaped tip end structure of the hook portion 42a is positioned where the first insulator 20 has a larger thickness. This suppresses the stiffness reduction of the engagement projection 22 of the first insulator 20 compared with the case in which the tip end structure of the hook portion 42a is positioned so as to superpose the first-contact mounting groove 24.

The hook portion 42a is shaped like the letter L, and the tip end 42a1 of the hook portion 42a is embedded in the engagement projection 22, which reduces the likelihood of the hook portion 42a being turned up. This increases the holding strength of the first insulator 20 holding the hook portion 42a. Consequently, this increases the holding strength of the first insulator 20 holding the first metal fitting 40a.

The first base portion 41a and the second base portion 43a of the first metal fitting 40a are formed integrally so as to have the crank-like shape as a whole. Accordingly, the entire first base portion 41a is integrally embedded in the first insulator 20 so as to follow the shape of the end portion of the engagement projection 22. This increases the holding strength of the first insulator 20 holding the first metal fitting 40a.

The width of the hook portion 42a is smaller than the width of any other portion of the first metal fitting 40a in the transverse direction of the connector 10. This increases the thickness of the first insulator 20 where the hook portion 42a is embedded. For example, even if the hook portion 42a superposes the one first contact 30 positioned at the end in the arrangement direction, in other words, even if the hook portion 42a superposes the first-contact mounting groove 24, the strength of the first insulator 20 can be maintained because the width of the hook portion 42a is small. As a result, the sturdiness of the connector 10 improves.

The second base portion 43a of each first metal fitting 40a extends in the longitudinal direction of the connector 10 from the engagement projection 22 to the corresponding second metal fitting 40b. This improves the sturdiness of the first metal fitting 40a in the longitudinal direction of the connector 10. Consequently, this improves the sturdiness of the engagement projection 22 extending in the longitudinal direction of the connector 10.

The first mount portions 44b of the second metal fitting 40b are also disposed respectively at both sides of the first metal fitting 40a in the transverse direction of the connector 10. The second mount portions 49b of the second metal fitting 40b are disposed respectively at both sides of the first metal fitting 40a in the transverse direction of the connector 10. This structure increases the mounting strength of the second metal fitting 40b mounted on the circuit substrate CB1. This improves the sturdiness of the second metal fitting 40b in the right-left direction.

A pair of the first mount portions 44b are disposed substantially at the same position as the mount portion 45a in the right-left direction. Accordingly, three mount portions are aligned along an imaginary line extending in the front-rear direction. This increases the mounting strength of the connector 10 mounted on the circuit substrate CB1. Even if the connection object 50 and the connector 10 engage each other in a misaligned state in which the connection object 50 is, for example, rotated relative to the connector 10 by a certain degree about an axis extending in the up-down direction, the connector 10 remains to be mounted on the circuit substrate CB1. Similarly, even if the circuit substrate CB1 having the connector 10 mounted thereon is rotated after the engagement, the connector 10 remains to be mounted on the circuit substrate CB1. Accordingly, the sturdiness of the connector 10 mounted on the circuit substrate CB1 improves.

Each second metal fitting 40b includes the elastically deformable contact arms 48b that come into contact with the corresponding metal fitting 80 in the engagement state. The contact arms 48b, which exert elastic forces to the metal fitting 80, can reliably maintain the state of connection with the metal fitting 80. Accordingly, the electrical continuity can be maintained reliably between the second metal fitting 40b and the metal fitting 80 in the engagement state.

The first metal fitting 40a and the second metal fitting 40b, which are spaced from each other, oppose each other in the right-left direction, and the metal fitting 80 of the connection object 50 is positioned between the first metal fitting 40a and the second metal fitting 40b in the engagement state in which the connector 10 and the connection object 50 engage each other. The structure in which the metal fitting 80 is interposed between the first metal fitting 40a and the second metal fitting 40b in the engagement state reduces the likelihood of the connector module 1 loosening after the engagement. As a result, the dimensional accuracy and the shape integrity of the connector 10 can be maintained during the engagement. The positioning function of the connector 10 and the connection object 50 relative to each other can be maintained even after the engagement. As a result, the connector 10 and the connection object 50 do not come off easily from each other, which improves the product reliability of the connector module 1.

The first metal fitting 40a and the first insulator 20 are formed integrally using insert molding, which increases the holding strength of the first insulator 20 holding the first metal fitting 40a. This further improves the sturdiness of the first metal fitting 40a and the engagement projection 22.

Those skilled in the art can obviously implement the present disclosure in a form other than the above-described embodiment without departing from the spirit or the essential features of the present disclosure. As such, the above description is only illustrative and should not be construed as limiting. The scope of the disclosure is not limited by the above description but by the appended claims. Variations that fall within the scope of the claim or the equivalents thereof are to be included in the present disclosure.

For example, the shapes, arrangements, and orientations of elements as well as the number of elements are not limited to what is disclosed in the above description and in the drawings. The shapes, arrangements, and orientations of elements as well as the number of elements may be changed arbitrarily insofar as the specified functions can be implemented.

In the above description of the embodiment, the installation portions 45b of each second metal fitting 40b are embedded integrally in the first insulator 20 using insert molding. In the connector 10, however, the second metal fitting 40b may be attached to the first insulator 20, for example, using press-fitting rather than insert molding. For example, in the connector 10, each first metal fitting 40a may be attached to the first insulator 20 by press-fitting rather than by insert molding.

In the above description of the embodiment, the first insulator 20 includes a pair of the outer walls 23 that are disposed at respective positions on the first insulator 20 in the front-rear direction. The first insulator 20, however, may include a single outer wall 23 formed only on one side of the first insulator 20 in the front-rear direction.

In the above description of the embodiment, only the second metal fitting 40b is present in each region R, and the first insulator 20 is not formed in the region R. In each region R, however, an arbitrary portion of the first insulator 20 excluding the outer wall 23 can be formed. For example, the bottom plate 21 may protrude into the region R, and the protruded portion may be surrounded by the peripheral portion 40b1 of the second metal fitting 40b in the region R. This improves the electrical insulation between the second metal fitting 40b and the circuit substrate CB1.

In the above description of the embodiment, the second metal fitting 40b includes the peripheral portion 40b1 in the region R, and the peripheral portion 40b1 constitutes part of the periphery of the connector 10. In the region R, the second metal fitting 40b, however, may additionally include a bottom portion that is formed so as to be continuous to, or attached to, the bottom plate 21 of the first insulator 20.

In the above description of the embodiment, only the outer peripheral surface 47b2 is formed continuously on the peripheral portion 40b1 from one of the installation portions 45b to the other. The inner peripheral surface 47b1, however, may be formed continuously on the peripheral portion 40b1 from one of the installation portions 45b to the other in addition to, or in place of, the outer peripheral surface 47b2.

In the peripheral portion 40b1, at least one of the outer peripheral surface 47b2 and the inner peripheral surface 47b1 does not need to be formed continuously from one of the installation portions 45b to the other. The peripheral portion 40b1 may be formed using an arbitrary method other than the metal drawing so as to have an arbitrary shape in which, for example, a slit or a hole is formed at a corner.

In the above description of the embodiment, the peripheral portion 40b1 has the dual-wall structure extending along peripheral sides of the connector 10 in the region R. The peripheral portion 40b1, however, may have an arbitrary structure, other than the dual-wall structure, extending along the peripheral sides of the connector 10 in the region R. For example, the peripheral portion 40b1 may have a single-wall structure or a triple-wall structure.

In the case of the peripheral portion 40b1 having the single-wall structure, the engagement between the second metal fitting 40b and the metal fitting 80 may be achieved by a structure using a protrusion and a recess rather than by the structure using the contact arms 48b having the spring elasticity. For example, a protrusion formed on the inner peripheral surface 47b1 of the second metal fitting 40b may engage a recess formed at the outer surface of the metal fitting 80 to achieve the engagement between the second metal fitting 40b and the metal fitting 80.

In the above description of the embodiment, a single first metal fitting 40a is disposed at each end of the engagement projection 22 in the right-left direction. The first metal fitting 40a, however, may be made of a pair of members that are spaced from each other and are disposed so as to serve as the first end portion 41a1 and the second end portion 41a2, respectively. In other words, the first metal fitting 40a consists of multiple members.

In the above description of the embodiment, the first metal fitting 40a includes the first projected portion 41a3 and the second projected portion 41a4. The first metal fitting 40a, however, may include only one of the first projected portion 41a3 and the second projected portion 41a4 or may include neither of these.

In the above description of the embodiment, the first metal fitting 40a includes the third projected portion 41a5 and the fourth projected portion 41a6. The first metal fitting 40a, however, may include only one of the third projected portion 41a5 and the fourth projected portion 41a6 or may include neither of these.

In the above description of the embodiment, the first metal fitting 40a includes the fifth projected portion 41a7. The first metal fitting 40a, however, does not need to include the fifth projected portion 41a7.

In the above description of the embodiment, the first metal fitting 40a includes the first flat surface S1, the second flat surface S2, the third flat surface S3, and the fourth flat surface S4. The first metal fitting 40a, however, may include at least one of the first flat surface S1, the second flat surface S2, the third flat surface S3, and the fourth flat surface S4, or may include neither of these. At least one of the first flat surface S1, the second flat surface S2, the third flat surface S3, and the fourth flat surface S4 of the first metal fitting 40a may be a curved surface.

In the above description of the embodiment, the first metal fitting 40a seamlessly covers the first face 221, the second face 222, the third face 223, and the fourth face 224, as well as all the intersection lines therebetween, with surfaces of the first metal fitting 40a, the surfaces orthogonally intersecting the thickness direction of the first metal fitting 40a, in the longitudinal end portion of the engagement projection 22. The first metal fitting 40a may be formed so as to have an arbitrary shape using an arbitrary method other than the metal drawing insofar as the first metal fitting 40a includes the first end portion 41a1 and the second end portion 41a2.

FIG. 13 is an enlarged view, as viewed from below, illustrating the connector 10 according to an alternative embodiment, the view corresponding to the view of FIG. 8. In the above description of the embodiment, the first metal fitting 40a and the second metal fitting 40b are separated from each other. However, the first metal fitting 40a and the second metal fitting 40b do not need to be separated but may be connected. In this case, the first metal fitting 40a and the second metal fitting 40b may be formed integrally but may have different strengths in a one-piece metal fitting. For example, the one-piece metal fitting in which the first metal fitting 40a and the second metal fitting 40b are integrated may be made of a functionally graded material. More specifically, the material of the portion of the first metal fitting 40a may be different from the material of the portion of the second metal fitting 40b so as to have a greater strength. For example, the one-piece metal fitting in which the first metal fitting 40a and the second metal fitting 40b are integrated may be formed so as to have different thicknesses. More specifically, the thickness of the portion of the first metal fitting 40a may be greater than that of the portion of the second metal fittings 40b.

The one-piece metal fitting, in which the first metal fitting 40a and the second metal fitting 40b are integrated, is embedded integrally in the first insulator 20 using insert molding at two portions, in other words, at the first-metal-fitting holding portion 25 and at the second-metal-fitting holding portions 26. Consequently, this increases the holding strength of the first insulator 20 holding the one-piece metal fitting. In the case of the first metal fitting 40a and the second metal fitting 40b being separate members, however, the first metal fitting 40a and the second metal fitting 40b are easier to manufacture. For example, press forming becomes easier compared with the case in which the first metal fitting 40a is shaped by drawing and subsequently joined to the second metal fitting 40b.

In the above description of the embodiment, the connector 10 includes the first metal fittings 40a attached to the engagement projection 22. The connector 10, however, does not need to include such metal fittings to be attached to the engagement projection 22.

In the above description of the embodiment, the strength of the first metal fitting 40a is greater than the strength of the second metal fitting 40b. The strength of the second metal fitting 40b, however, may be greater than that of the first metal fitting 40a.

In the above description of the embodiment, the thickness of the first metal fitting 40a is greater than the thickness of the second metal fitting 40b in order to increase the strength of the first metal fitting 40a relative to the strength of the second metal fitting 40b. For example, the thickness of the first metal fitting 40a may be smaller than that of the second metal fitting 40b, and the strength of the first metal fitting 40a may be greater than that of the second metal fitting 40b. On the contrary, the thickness of the first metal fitting 40a may be greater than that of the second metal fitting 40b, and the strength of the first metal fitting 40a may be smaller than that of the second metal fitting 40b.

In the above description of the embodiment, each first metal fitting 40a superposes the one first contact 30 in the arrangement direction. The first metal fitting 40a, however, does not need to superpose the one first contact 30 in the arrangement direction if the size reduction of the connector 10 in the longitudinal direction can be achieved using a different method.

In the above description of the embodiment, the tip end 42a1 of the hook portion 42a of each first metal fitting 40a is positioned between the one first contact 30 and the adjacent first contact 30 in the arrangement direction. However, the tip end 42a1 of the hook portion 42a of the first metal fitting 40a may be disposed, in the right-left direction, at a position corresponding to the position at which, for example, a first contact 30 is attached to the first insulator 20, insofar as the holding strength of the first insulator 20 holding the tip end 42a1 of the hook portion 42a can be maintained.

In the above description of the embodiment, the hook portion 42a is shaped like the letter L, and the tip end 42a1 of the hook portion 42a is embedded in the engagement projection 22. The hook portion 42a, however, may have any shape other than the shape like the letter L insofar as the holding strength of the first insulator 20 holding the hook portion 42a can be maintained. In addition, the tip end 42a1 of the hook portion 42a does not need to be embedded in the engagement projection 22.

In the above description of the embodiment, the width of the hook portion 42a is smaller than the width of any other portion of the first metal fitting 40a in the transverse direction of the connector 10. The hook portion 42a, however, may have the same width as that of any other portion of the first metal fitting 40a insofar as the strength of the first insulator 20 can be maintained.

In the above description of the embodiment, the second base portion 43a of the first metal fitting 40a extends from the engagement projection 22 to the corresponding second metal fitting 40b. The second base portion 43a, however, may extend by an arbitrary length from the engagement projection 22 toward the second metal fitting 40b insofar as the sturdiness of the first metal fitting 40a improves in the longitudinal direction of the connector 10.

In the above description of the embodiment, the mount portion 45a of the first metal fitting 40a is positioned directly below the first base portion 41b of the second metal fitting 40b. The mount portion 45a, however, may be disposed at a position near the engagement projection 22 so as to be closer to a portion of the first metal fitting 40a on which an external force is likely to act.

In the above description of the embodiment, the first mount portions 44b of the second metal fitting 40b are disposed respectively at both sides of the first metal fitting 40a in the transverse direction of the connector 10, and the second mount portions 49b of the second metal fitting 40b are also disposed respectively at both sides of the first metal fitting 40a in the transverse direction of the connector 10. However, either the first mount portions 44b or the second mount portions 49b may be disposed respectively at both sides of the first metal fitting 40a in the transverse direction of the connector 10. Only one first mount portion 44b or three or more first mount portions 44b may be provided rather than the two first mount portions 44b. Similarly, only one second mount portion 49b or three or more second mount portions 49b may be provided rather than the two second mount portions 49b.

In the above description of the embodiment, the second metal fitting 40b does not include any mount portion on the side of the inner peripheral surface 47b1. The second metal fitting 40b, however, may include a mount portion on the side of the inner peripheral surface 47b1. For example, the second metal fitting