41a. In the front-rear direction, the width of the second base portion 43a at a position near the first base portion 41a is the same as or similar to the width of the first base portion 41a that continues to the second base portion 43a. For example, the second base portion 43a continues to the first base portion 41a so as to maintain the same width in the transverse direction of the connector 10.

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, of which the width in the front-rear direction is reduced symmetrically, continues to a portion of the second base portion 43a near the first base portion 41a. As illustrated in FIG. 6 (to be described later), the first metal fitting 40a includes a mount portion 45a. For example, the mount portion 45a includes a predefined region on the bottom surface of the portion of the second base portion 43a, the portion being positioned near the first base portion 41a. The mount portion 45a is formed in the second base portion 43a at a position adjacent to the narrow portion 44a in the right-left direction. The mount portion 45a, however, is not limited to the region surrounded by the dash-dot-dot line on the bottom surface of the second base portion 43a. In addition to this region, the mount portion 45a may further include the bottom surface of the narrow portion 44a and side surfaces of the second base portion 43a, the side surfaces extending in the up-down direction in the hole 27 of the first insulator 20.

Each first metal fitting 40a also includes an end portion 46a. The end portion 46a is formed in the narrow portion 44a of the second base portion 43a at an end opposite to the first base portion 41a. The end portion 46a is raised like a step from the other part of the second base portion 43a.

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 method of manufacturing the second metal fitting 40b includes a step of punching out a piece and a step of bending the punched piece in the thickness direction.

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 one side in the right-left direction from respective ends of the first base portion 41b in the front-rear direction. 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 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 respective bottom ends of the protruding portions 43b. The second metal fitting 40b includes locking portions 45b1 formed at respective protruding portions 43b. The locking portions 45b1 are formed so as to be wider in the front-rear direction than any other portions of the protruding portions 43b. The locking portions 45b1 protrude inward into the recess so as to reduce the width of the recess in the front-rear direction.

The second metal fitting 40b includes a curved portion 46b that is shaped like the letter U. The curved portion 46b is formed so as to protrude toward one side in the right-left direction from a central portion of the first base portion 41b in the front-rear direction. The second metal fitting 40b includes second mount portions 47b that protrude straight downward from respective bottom ends of front and rear portions of the curved portion 46b.

The second metal fitting 40b includes contact arms 48b each shaped like the letter U. The contact arms 48b are formed near one ends of respective second base portions 42b in the right-left direction. Each contact arm 48b has a portion extending inward in the front-rear direction, and the portion has a spring-like elasticity. The second metal fitting 40b includes third 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. The third mount portions 49b extend substantially entirely along respective second base portions 42b in the right-left direction. The second metal fitting 40b includes locking portions 45b2 that adjoin respective upper parts of the third mount portions 49b. Each locking portion 45b2 is formed in the second base portion 42b so as to have a width greater than that of any other part in the right-left direction. The locking portion 45b2 has symmetrically shaped protrusions that protrude from respective second base portions 42b in the right-left direction.

FIG. 5 is an enlarged view illustrating region V surrounded by the dash-dot-dot line in FIG. 3. FIG. 6 is an enlarged view illustrating the connector 10 of FIG. 5 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.

When the 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 longitudinal wall 23b. 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 outside the longitudinal wall 23b in the front-rear direction.

As illustrated in FIGS. 5 and 6, the first metal fitting 40a and the second metal fitting 40b are separate members. The first metal fittings 40a are separated from the second metal fittings 40b. In the separated state, each first metal fitting 40a opposes the corresponding 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 “a 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 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.

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.

A pair of 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 transverse wall 23a to which a second metal fitting 40b is attached.

For example, each first metal fitting 40a is formed 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 folioed integrally in an end portion of the engagement projection 22, the end portion being positioned in the right-left direction, so as to extend along the top surface and the side surface of the end portion. For example, the first base portion 41a is formed integrally in the first cavity 251 of the first-metal-fitting holding portion 25. The top surface of the first base portion 41a and the side surface of the first base portion 41a facing outward in the right-left direction are exposed from the first insulator 20. For example, the top surface of the first base portion 41a is flush with the top surface of the engagement projection 22. For example, the side surface of the first base portion 41a facing outward in the right-left direction is flush with the corresponding side surface of the engagement projection 22. The top and side surfaces of the first base portion 41a, however, are not limited to the above. The top surface of the first base portion 41a may be disposed below the top surface of the engagement projection 22. The side surface of the first base portion 41a may be positioned further inside from the side surface of the engagement projection 22 in the right-left direction.

The hook portion 42a is formed 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 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 is formed integrally in the bottom plate 21 and in the transverse wall 23a. For example, a part of the second base portion 43a excluding the end portion 46a is formed integrally in the second cavity 252 of the first-metal-fitting holding portion 25. In this state, a part of the second base portion 43a positioned in the hole 27 of the first insulator 20 is exposed upward from the hole 27. For example, the part of the second base portion 43a is positioned below the top surface of the bottom plate 21. For example, the end portion 46a of the second base portion 43a is formed integrally in the third cavity 253 of the first-metal-fitting holding portion 25. In this state, the end portion 46a is exposed outward in the right-left direction from the first wall portion 261 of the transverse wall 23a.

When the first metal fitting 40a and the first insulator 20 are formed integrally using insert molding, the narrow portion 44a is in close contact with the bottom plate 21. The second base portion 43a extends in the longitudinal direction of the connector 10. The second base portion 43a extends from the engagement projection 22 to the transverse wall 23a to which the second metal fitting 40b is attached. A part of the bottom surface of the second base portion 43a, the part excluding the bottom surface of the end portion 46a, is exposed from the first insulator 20. For example, the part of the bottom surface of the second base portion 43a is positioned below the bottom surface of the bottom plate 21.

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 a part of the bottom surface of the second base portion 43a, the part being interposed between the first base portion 41a and the narrow portion 44a in the right-left direction. The mount portion 45a is positioned between the engagement projection 22 and the transverse wall 23a in the right-left direction. The mount portion 45a is formed at a position outside of, and adjacent to, the engagement projection 22 in the right-left direction.

The mount portion 45a is not limited to what has been described above. The mount portion 45a can include the entire bottom surface of the second base portion 43a except for the bottom surface of the end portion 46a. The mount portion 45a may further include part of side surfaces of the second base portion 43a, the part being positioned in the hole 27 and extending in the up-down direction. The mount portion 45a may also include a part of the top surface of the second base portion 43a, the part being exposed upward from the hole 27.

For example, each second metal fitting 40b is press-fitted into the first insulator 20 from above. Each second metal fitting 40b is attached to a corresponding one of the peripheral walls 23 in such a manner that the first wall portion 261 is nipped in the recess of the second metal fitting 40b, the recess being defined by the lower edge of the first base portion 41b and also by the mutually opposing edges of respective protruding portions 43b that are spaced in the front-rear direction.

Here, each locking portion 45b1 of the second metal fitting 40b is locked between the first wall portion 261 and the corresponding second wall portion 262 of the second-metal-fitting mounting portion 26 at a position outside the transverse wall 23a in the right-left direction. A pair of the protruding portions 43b separated in the front-rear direction are fitted in respective first mounting grooves 264. Similarly, each locking portion 45b2 of the second metal fitting 40b is locked between the second wall portion 262 and the corresponding third wall portion 263 of the second-metal-fitting mounting portion 26 at a position outside the corresponding longitudinal wall 23b in the front-rear direction. The locking portion 45b2 is thereby fitted in a corresponding one of second mounting grooves 265. Thus, the second metal fitting 40b is held by the second-metal-fitting mounting portion 26.

When the second metal fitting 40b is held by the second-metal-fitting mounting portion 26 of the first insulator 20, the second metal fitting 40b covers the entire transverse wall 23a and also covers part of the longitudinal walls 23b at ends in the right-left direction. In this state, the second metal fitting 40b surrounds both sides of the second base portion 43a of the first metal fitting 40a in the front-rear direction and the rear side of the second base portion 43a in the right-left direction. More specifically, the second base portions 42b 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 second metal fitting 40b are disposed so as to superpose the outermost part 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 a portion being positioned inside in the front-rear direction and extending downward, and this portion is elastically deformable in the front-rear direction.

The first mount portions 44b of the second metal fitting 40b are disposed along the outside surface of the corresponding transverse wall 23a, the outside surface facing outward in the right-left direction. The first mount portions 44b protrude downward below the bottom end of the transverse wall 23a. 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. For example, the first mount portions 44b are disposed respectively at symmetrical positions in the front-rear direction with respect to the second base portion 43a of the first metal fitting 40a.

The second mount portions 47b of the second metal fitting 40b are disposed along the inside surface of each transverse wall 23a, the inside surface facing inward in the right-left direction. The second mount portions 47b and the first mount portions 44b are disposed so as to straddle the transverse wall 23a. The second mount portions 47b protrude downward below the bottom end of the transverse wall 23a. The second mount portions 47b protrude downward through the bottom plate 21 and are exposed therefrom. The second mount portions 47b 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 47b 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 47b are disposed respectively at symmetrical positions in the front-rear direction with respect to the second base portion 43a of the first metal fitting 40a. In the front-rear direction, the distance between the second mount portions 47b is smaller than the distance between the first mount portions 44b. The second mount portions 47b are disposed so as to adjoin the second base portion 43a of the first metal fitting 40a in the front-rear direction.

The third mount portions 49b of the second metal fitting 40b are disposed along the outside surfaces of respective longitudinal walls 23b, the outside surfaces facing outward in the front-rear direction. The third mount portions 49b protrude downward below the longitudinal walls 23b. The third mount portions 49b are positioned respectively at both sides of the first metal fitting 40a in the transverse direction of the connector 10. A pair of the third 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 third mount portions 49b are disposed at symmetrical positions in the front-rear direction with respect to the mount portion 45a of the second base portion 43a. In the right-left direction, the third mount portions 49b are disposed substantially at the same positions as the mount portion 45a and the narrow portion 44a of the first metal fitting 40a.

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 portions 45a of respective first metal fittings 40a, and the first mount portions 44b, the second mount portions 47b, and the third mount portions 49b of respective second metal fittings 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. 7.

FIG. 7 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 and the metal fittings 80 using insert molding.

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 fainted 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 outside surfaces of the second contact 70, the outside surfaces facing outward in the front-rear direction and being positioned at the front side and at the rear side of the curved portion 72, respectively.

Each second contact 70 is formed integrally in a corresponding second-contact holding portion 64 of the second insulator 60 using insert molding. 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 respectively from both 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 in the front-rear direction. The metal fitting 80 includes mount portions 85 positioned at respective bottom ends of the second extension portions 83 and the first extension portion 82 facing outward. The metal fitting 80 is formed integrally in each metal-fitting holding portion 65 of the second insulator 60 using insert molding.

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 respective 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.

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 with reference to FIGS. 8 to 10. FIG. 8 is a cross-sectional view of the connector module 1 taken along line VIII-VIII in FIG. 1.

For example, the orientation of the connection object 50 illustrated in FIG. 7 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 direction and in the right-left direction. 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 spring-like 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, between the elastic contact point 35 and one of the contact points 73 and between the contact point 36 and the other contact point 73.

FIG. 9 is a cross-sectional view of the connector module 1 taken along line IX-IX 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 spring-like elasticity are deformed 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 is positioned below the top surface of the bottom plate 21. Accordingly, even if solder may reach the top surface of the second base portion 43a, the solder can be accommodated in the space formed 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 engagement failure between the connector 10 and the connection object 50. In other words, this reduces the likelihood of an excessive amount of solder interfering the engagement between the connector 10 and the connection object 50.

The mount portion 45a that is formed widely increases the mounting strength of the connector 10 mounted on the circuit substrate CB1. In addition, the first insulator 20 includes the hole 27, which enables side fillets of solder to be formed, for example, as illustrated in FIG. 9. This increases the mounting strength of the connector 10 mounted on the circuit substrate CB1. This improves the robustness of the connector 10.

FIG. 10 is a cross-sectional view of the connector module taken along line X-X 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. In the engagement state, the curved portion 46b 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.

Multiple first contacts 30 are arranged in a row in the arrangement direction, which is parallel to the longitudinal direction of the connector 10. Each first metal fitting 40a superposes a one first contact 30 positioned at each end of the row in the arrangement direction. For example, as illustrated in FIG. 5, 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 that extends in the right-left direction comes to the same position as that of the one first contact 30 in the right-left direction.

As illustrated in FIG. 10, 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 another first contact 30 disposed next to the one first contact 30. For example, another part of the hook portion 42a extending in the right-left direction is also positioned, together with the tip end 42a1 that extends in the up-down direction, between the one first contact 30 and another first contact 30 positioned next to the one first contact 30 in the arrangement direction.

In FIG. 10, the thickness of each first metal fitting 40a is substantially equal to or smaller than the thickness of each second metal fitting 40b. The thickness of the first metal fitting 40a, however, can be 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.

The connector 10 according to the embodiment as described above improves the robustness during and after the engagement between the connector 10 and the connection object 50 even in the case of the connector 10 being reduced in size and height. In the connector 10, each first metal fitting 40a attached to the engagement projection 22 and the corresponding second metal fitting 40b attached to a peripheral wall 23 are separate members. This reduces a negative impact caused due to the connection object 50 hitting a metal fitting during engagement compared with a known art in which the metal fitting is formed integrally as one piece. For example, in the case of the connection object 50 hitting part of the metal fitting at the engagement projection 22 or at the peripheral wall 23, the likelihood of the impact extending to the other part of the metal fitting is reduced. This reduces the occurrence of breakage of the metal fitting that includes the first metal fitting 40a and the second metal fitting 40b. The reduction of the occurrence of breakage of the metal fitting leads to a reduction in the occurrence of breakage of the first insulator 20 to which the metal fitting is 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 during the engagement, the connection object 50 comes into contact with a second metal fitting 40b on the peripheral wall 23 and causes the second metal fitting 40b and the peripheral wall 23 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 comes into contact with 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 peripheral wall 23 is reduced. The likelihood of 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, each metal fitting behaves differently and independently at the engagement projection 22 and at the peripheral wall 23. The behavior of the metal fitting at the engagement projection 22 does not readily propagate to the metal fitting at the peripheral wall 23, and vice versa. This reduces the occurrence of the breakage, and the metal fittings together can perform an expected function 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 also be 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 peripheral wall 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 peripheral wall 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 disposed for the purpose of improving the robustness of the engagement projection 22. The first metal fitting 40a is not intended for electrical connection with the metal fitting 80 of the connection object 50 in the engagement state. On the other hand, the second metal fitting 40b attached to the peripheral wall 23 is disposed 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 the peripheral wall leads to a decrease in the overall strength of the metal fitting, which results in a decrease in the robustness 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. The 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 robustness 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. As a result, the robustness of the engagement projection 22 to which the first metal fitting 40a is attached also increases.

A pair of 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 robustness 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 robustness 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, dimensional accuracy and shape integrity of the connector 10 can be maintained during the engagement. This improves, for example, the robustness 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 of the first metal fitting 40a is disposed at a position outside of, and adjacent to, the engagement projection 22. In other words, the mount portion 45a is present at a position obliquely below a portion to which an external force tends to act, such as the curved portion of the first base portion 41a that is integrally joined to the end portion of the engagement projection 22. Accordingly, the mount portion 45a can effectively receive the external force acting on the first metal fitting 40a. This further improves the robustness of the first metal fitting 40a and the engagement projection 22.

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 robustness of the first metal fitting 40a extending in the longitudinal direction of the connector 10. This further improves the robustness of the engagement projection 22 extending also 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 contributes 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 another 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. This increases the holding strength of the first insulator 20 holding the first metal fitting 40a. In addition, 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 where the first-contact mounting groove 24 is formed.

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 are formed integrally so as to have the crank-like shape as a whole. Accordingly, the entire first metal fitting 40a integrally fits the first insulator 20 so as to follow the shape of the end portion of the engagement projection 22 and the shape of the bottom plate 21. This increases the holding strength of the first insulator 20 holding the first metal fitting 40a.

The second base portion 43a continues to the first base portion 41a so as to maintain the same width in the transverse direction of the connector 10. This improves the strength of the connection portion between the first base portion 41a and the second base portion 43a, which leads to an increase in the strength of the first metal fitting 40a. Consequently, this improves the robustness of the engagement projection 22 to which the first metal fitting 40a is attached.

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 integrated. 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, 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 robustness 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 transverse wall 23a to which a second metal fitting 40b is attached. This improves the robustness of the first metal fitting 40a extending in the longitudinal direction of the connector 10. Consequently, this improves the robustness of the engagement projection 22 extending in the longitudinal direction of the connector 10. The same effect can be obtained between the engagement projection 22 and the corresponding transverse wall 23a that are spaced from each other in the longitudinal direction of the connector 10. Even if the connection object 50 hits part of the metal fitting at the engagement projection 22 or at the transverse wall 23a, the likelihood of the impact extending to the other part of the metal fitting is reduced.

The mount portion 45a is positioned between the engagement projection 22 and the transverse wall 23a. In other words, the mount portion 45a is positioned adjacent to a portion of the first metal fitting 40a on which an external force is likely to act. For example, the mount portion 45a is positioned obliquely below the curved portion of the first base portion 41a, and the curved portion is a portion that is integrally joined to the end portion of the engagement projection 22 and on which an external force tends to act. The mount portion 45a is positioned in the first base portion 41a near or on an imaginary extension line drawn in a direction of an external force from the point on which the external force acts. Accordingly, the mount portion 45a effectively receives the external force acting on the first metal fitting 40a. This further improves the robustness of the first metal fitting 40a and the engagement projection 22.

Each second metal fitting 40b has the second mount portions 47b that are disposed in the right-left direction along the inside surface of the corresponding transverse wall 23a. The second mount portions 47b are disposed such that the transverse wall 23a is interposed between the second mount portions 47b and the first mount portions 44b. This improves the robustness of the second metal fitting 40b and the transverse wall 23a in the right-left direction. For example, this reduces the likelihood of the second metal fitting 40b and the transverse wall 23a being deformed in the right-left direction. For example, the second metal fitting 40b and the transverse wall 23a do not incline outward easily in the right-left direction during the engagement. The connector 10 and the connection object 50 may engage each other in a misaligned state, and the connection object 50 may hit the second metal fitting 40b on the transverse wall 23a during the engagement. Even in this case, the likelihood of deformation of the second metal fitting 40b and the transverse wall 23a is reduced.

The reduction of the likelihood of deformation of the second metal fitting 40b and the transverse wall 23a further reduces the likelihood of displacement of the connector 10 in the longitudinal direction during and after the engagement between the connector 10 and the connection object 50. 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 also be reduced after the engagement. As a result, the dimensional accuracy and the shape integrity of the connector 10 can be maintained during the engagement. 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 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. The second mount portions 47b 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 increases the mounting strength of the second metal fitting 40b mounted on the circuit substrate CB1. This improves the robustness of the second metal fitting 40b and the transverse wall 23a in the right-left direction.

In the front-rear direction, the distance between the first mount portions 44b is larger than the distance between the second mount portions 47b, which increases the mounting strength of the second metal fitting 40b mounted on the circuit substrate CB1. For example, even if the distance between the second mount portions 47b inevitably decreases in the front-rear direction at the inner side of the transverse wall 23a, the distance between the first mount portions 44b in the front-rear direction remains to be large. As a result, the mounting strength of the second metal fitting 40b mounted on the circuit substrate CB1 increases. This improves the robustness of the second metal fitting 40b and the transverse wall 23a in the right-left direction.

The first wall portion 261 of which the width is large in the front-rear direction is nipped in the recess of the second metal fitting 40b of which the size is large in the front-rear direction. This increases the holding power of the second-metal-fitting mounting portion 26 in holding the second metal fitting 40b.

A pair of the third mount portions 49b 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 robustness of the connector 10 mounted on the circuit substrate CB1 improves.

Portions of the second metal fitting 40b are present at both sides of the second base portion 43a of the first metal fitting 40a in the transverse direction of the connector 10. Accordingly, the attaching area of the second metal fitting 40b to be attached to the first insulator 20 increases. Consequently, this increases the holding strength of the first insulator 20 holding the second metal fitting 40b.

The second metal fittings 40b are attached to respective transverse walls 23a, which improves the robustness of the transverse walls 23a at both ends of each peripheral wall 23 extending in the right-left direction. This further reduces the occurrence of breakage of the transverse walls 23a of the first insulator 20 to which respective second metal fittings 40b are attached. As a result, the product reliability of the connector 10 is further improved.

Each second metal fitting 40b includes the elastically deformable contact arms 48b that come into contact with the metal fitting 80 in the engagement state. The contact arms 48b, which exert elastic forces to the metal fitting 80, can maintain the state of connection with the metal fitting 80 reliably. Accordingly, the electrical continuity can be maintained 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 away 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. 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 further improves the robustness of the first metal fitting 40a and the engagement projection 22. The end portion 46a of each first metal fitting 40a is formed integrally in the third cavity 253 of the first-metal-fitting holding portion 25 of each transverse wall 23a, in other words, formed integrally with the first insulator 20. This increases the contact area between the first metal fitting 40a and the first insulator 20. Consequently, this increases the holding strength of the first insulator 20 holding the first metal fitting 40a, which are formed by insert molding. This further improves the robustness of the first metal fitting 40a and the engagement projection 22.

The second base portion 43a is formed widely at the position of the hole 27 in the right-left direction. The second base portion 43a also includes the narrow portion 44a that extends from the wide portion toward the transverse wall 23a. The narrow portion 44a is formed narrowly and is in close contact with the bottom plate 21. Accordingly, the thickness of the bottom plate 21 increases where the second base portion 43a is integrated with the bottom plate 21. Consequently, this increases the strength of the first insulator 20. As a result, the robustness of the connector 10 improves.

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.

For example, in the connector 10, the second metal fittings 40b may be integrated into the first insulator 20 by insert molding rather than by press-fitting. For example, in the connector 10, the first metal fittings 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 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. For example, the 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 have a strength greater than that of the material of the portion of the second metal fitting 40b. For example, the 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.

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. However, the strength of the second metal fitting 40b 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, while the strength of the first metal fitting 40a is 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, while the strength of the first metal fitting 40a is 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