BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to an electronic module, and more particularly to an electronic module having an improved latch mechanism for high speed signal transmission. The application relates to a copending application with attorney docket number US38271 filed on Feb. 27, 2012 with the same applicant and the same assignee and the same title with the instant application.

2. Description of Related Art

SFP (Small Form-factor Pluggable), X-SFP and QSFP are all modules for fiber optic transmission or copper-based signal transmission. It is important for the modules to be of small size or form factor. The smaller the form factor of the module, the less space taken on a printed circuit board to which it couples. A smaller form factor allows a greater number of modules to be coupled onto a printed circuit board to support additional communication channels. However, the smaller form factor makes it more difficult for a user to handle. When such a module embedded in a system fails, it need be replaced. To replace a failed module, it needs to be pluggable into a module receptacle surrounding a host board connector.

U.S. Pat. No. 7,309,250 discloses a module received in a corresponding cage or receptacle and comprising a housing, a circuit card, and a de-latching assembly at least partially disposed within the housing. The latching assembly has a rear handle portion and two arms that extend forwardly from the handle portion through the housing, the arms are terminating in free ends, and each of the free ends includes a cam portion that is aligned to selectively contact a corresponding engagement tab disposed on an opposing shielded housing to move the engagement tab out of engagement with the plug connector housing so that the plug connector may be disengaged and easily removed from the shielded housing. U.S. Pat. No. 7,736,171 discloses a module comprising a housing, an actuator moveable relative to the housing in a horizontal direction, and a latch member discrete from and operable by the actuator. The latch member comprises an engaging portion assembled to said housing, an actuation section positioned forwardly from the engaging portion and actuated by a cooperating portion of the actuator, and a front latch portion.

An electronic module having an improved latch mechanism is desired.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to provide an electronic module having an improved latch mechanism to be separated from a complementary connector expediently.

In order to achieve the object set forth, an electronic module for mating with a complementary connector, comprises: a housing, a printed circuit board disposed in the housing, a slider member movably received in the channel, and a cover member mounted to the housing over the slider member. The slider member has a body portion and a pair of curved arm portions extending forwardly from the body portion. The cover member has a pair of curved contacting portions overlaying the pair of curved arm portions of the slider member, the pair of curved contacting portions being moveable outward in response to a sliding movement of the pair of curved arm portions.

Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded, perspective view of an electronic module in accordance with the present invention;

FIGS. 2-3 are other views similar to FIG. 1, but viewed from different aspects;

FIG. 4 is an assembled, perspective view of the electronic module shown in FIG. 1;

FIG. 5 is an exploded, perspective view of an electrical connector assembly formed by the electronic module shown in FIG. 4 and an cage of a complementary connector;

FIG. 6 is an assembled, perspective view of the electrical connector assembly formed by the electronic module and an cage of a complementary connector;

FIG. 7 is a cross-section view taken along line 7-7 of FIG. 4; and

FIG. 8 is a cross-section view of FIG. 7 when a pull tape of the electronic module is moved rearwardly.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to the preferred embodiment of the present invention, taking a copper based module as an example. It is noted that the present invention generally finds its application in other types of modules like opto-electronic modules, transceivers, etc., either connectorized for receiving optical connectors or permanently integrated with fiber cables, which substantially includes an outer housing or frame. Therefore, the term â€œelectronic moduleâ€ is intended to include opto-electronic modules or transceivers.

Referring to FIGS. 1-4, the electronic module 100 comprises a housing (not numbered) defining a front mating port and a rear locking port and formed by a conductive base portion 1 and a conductive panel portion 2, a printed circuit board 3, a cable 4, a metallic gasket 5 and a latch mechanism (not numbered).

Referring to FIGS. 1-3, the base portion 1 is die-cast or other metallic plated body, and includes a primary body portion 11 and a first mounting portion 12 rearward extending from a back face of the primary body portion 11.

The primary body portion 11 has a pair of lateral walls 111, 112 and a top wall 113 connecting with the lateral walls 111, 112 to form a receiving space 110 with an opening (not numbered) facing downward. Rear sections of the pair of the lateral walls 111, 112 define a pair of first depression portions 1110. An outlet 1131 is formed on a front section of the top wall 113. A rear section of the top wall 113 defines a first channel 1132 located in a middle area thereof. And, a locking piece 1133 is formed in the front and middle of the first channel 1132. A pair of sunken portions 1134 are formed on two lateral areas of the rear section of the top wall 113, and respectively arranged at two outer sides of the first channel 1132. A pair of indentations 1135 are respectively located at inner side of the corresponding sunken portions 1134 and formed in front of the first channel 1132. And each of the indentation 1135 is deeper than each of the sunken portion 1134. A pair of protrusions 1136 are respectively formed in a rear end of the two sunken portions 1134. A pair of tiny posts 1137 are respectively formed in the pair of indentations 1135. A pair of recesses 1138 are formed on two sides of the first channel 1132 and located on the rear section of the top wall 113. The two recesses 1138 are also respectively located at two inner sides of the two sunken portions 1134 and located behind the two indentations 1135. And, the recess 1138 is deeper than the indentation 1135.

The primary body portion 11 further has a beam portion 114 with substantially L-shaped cross-section interconnecting two front ends of the pair of the lateral walls 111, 112. The lateral walls 111, 112 of the primary body portion 11 respectively has two first standoffs 1112 and a second standoff 1113 located in front of the two first standoffs 1112 on an inner surface thereof. The two first standoffs 1112 and the second standoff 1113 are located adjacent to the outlet 1131 of the primary body portion 11. And a pair of wider ribs 1115 are respectively formed on two inner surfaces of the lateral walls 111, 112 and disposed in front of each second standoff 1113. Each second standoff 1113 has a situating post 1114 formed thereon. The situating post 1114 formed on the lateral wall 111 and the situating post 1114 formed on the lateral wall 112 are staggered with each other along a longitudinal direction.

The first mounting portion 12 has a pair of side walls 121 and a top wall 122. The first mounting portion 12 defines a first semi-circular cavity 1201 and a first position slot 1202 located in front of the first semi-circular cavity 1201. The first position slot 1202 is deeper than the first semi-circular 1201. A second channel 1221 is formed on a middle area of the top wall 122 and communicated with the first channel 1132 of the primary body portion 11. A projection 1222 is formed in the second channel 1221 and located behind the locking piece 1133. A pair of fixing passages 1223 are formed on two lateral sides of the second channel 1221. And the first mounting portion 12 defines a pair of screw holes 1212 throughout the first mounting portion 12 along a vertical direction and respectively formed at two rear corners thereof. A pair of positioning posts 1224 are respectively formed on exterior surfaces of the pair of side walls 121.

The panel portion 2 is die-cast or a metallic plated body. The panel portion 2 comprises a secondary body portion 21 and a second mounting portion 22 extending rearwards from a back face of the secondary body portion 21. The secondary body portion 21 has a planar board member 213 and a pair of flange members 211, 212 formed on two lateral sides thereof. The board member 213 defines a second depression portion 2130 formed on an outer surface thereof and a vertical wall 2131 perpendicular to the pair of flange members 211, 212 and interconnected with two front ends of the pair of flange members 211, 212. The two flange members 211, 212 respectively defines two supporting posts 2133 extending upward from thereon. Four supporting posts 2133 are located behind the vertical wall 2131. A front supporting post 2133 of the two supporting posts 2133 on the flange member 211 has a first aperture 2134 opening facing rearwardly. And a front supporting post 2133 of the two supporting posts 2133 on the flange member 212 has a second aperture 2135 opening facing forwardly. That is to say, the first aperture 2134 and the second aperture 2135 have opposite facing directions with each other. The board member 213 has a protrusion portion 2132 on a front end thereof.

The second mounting portion 22 also has a pair of side walls 221 and a bottom wall 22. The second mounting portion 22 defines a second semi-circular cavity 2201 and a second position slot 2202 located in front of the second semi-circular cavity 2201. And the second mounting portion 12 defines a pair of through holes 2211 throughout the second mounting portion 12 along a vertical direction and respectively formed on two rear corners thereof.

The printed circuit board 3 includes a substrate 30, a plurality of first conductive pads 31 formed on two opposite surfaces of a front section of the substrate 30 and a plurality of second conductive pads (not shown) located on a rear section thereof. A pair of semi-circular positioning holes 32 are formed at two sides of a front segment of the substrate 30. The shape of the positioning hole 32 also can be defined by other configurations, such as square.

The cable 4 includes an outer insulative jacket 40 and a number of wires 41 enclosed by the insulative jacket 40. And a number of wires 41 are insulated with each other. A cable holder member 42 is attached to the cable 4 and surrounds a front portion of the cable 4. The cable holder member 42 is adjacent to the exposed wires 41. A front section of the wires 41 are electrically connected with the second conductive pads of the printed circuit board 3. And, an insulator 43 is formed around a connection between a front section of the wires 41 and a rear end of the printed circuit board 3.

The gasket 5 is made of metal sheet and has a rectangular frame portion 51. The frame portion 51 defines a pair of vertical sides 5a, 5b, a lower side 5c connecting with the pair of vertical sides 5a, 5b, and a pair of upper walls 5d respectively extending inwardly from two top ends of the pair of vertical walls 5a, 5b. An outlet 50 is formed between the pair of upper walls 5d for the gasket 5 easily assembling to the housing. A number of fingers 52, 53 formed on the frame portion 51 are divided into a layer of first fingers 53 and a layer of second fingers 52. A number of first fingers 53 are located on an outer side of the frame portion 51. A number of second fingers 52 are located on an inner side of the frame portion 51. A number of second fingers 52 are shielded by a number of first fingers 53 to achieve better Electro-Magnetic Interference (EMI) suppressing effect. A number of first fingers 53 extend rearward and outward from front edge of the frame portion 51. And a number of second fingers 52 are stamped from the frame portion 51 and extend rearward and outward. Each upper wall 5d defines a circular hole 54 cooperated with the tiny post 1137. Each upper wall 5d further defines a semi-circular hole 55 cooperated with the protrusion 1136.

The latch mechanism includes a slider member 61 and a pull tape 62 connected with each other. The slider member 61 is formed of metallic material and has a body portion 611 received in the second channel 1221, and two arm portions 612 extending forwardly from a front face of the body portion 611. The two arm portions 612 are spaced apart with each other along a transversal direction. The arm portions 612 are accommodated in the corresponding recesses 1138. Each arm portion 612 comprises a first slanted portion 6120 extending forwards from the front face of the body portion 611, and a second slanted portion or projecting section 6121 extending forwards from the first slanted portion 6120. A pair of cutouts 613 are formed on both sides of the body portion 611, a pair of elastic portions 614 are defined on both sides of the body portion 611 and outside the corresponding cutouts 613. A groove 615 is disposed in the middle of the body portion 611 along a transverse direction, the groove 615 is behind the elastic portions 614, and the projection 1222 of the base portion 1 is received into the groove 615 when the slider member 61 is assembled to the base portion 1.

The pull tape 62 is a soft belt with a certain width. The pull tape 62 defines a connecting end attached to a rear end of the slider member 61 and a handling portion 621 for an operator pulling the latch mechanism.

A metallic or cover member 9 is made of metal sheet and defines a pair of openings 91 on two sides thereof, the pair of openings 91 are formed in rear segment of the metallic member 9. A pair of contacting portions 92 extends from a front end of the metallic member 9, and the contacting portions 92 are abutting against to the corresponding arm portions 612. Each contacting portion 92 has similar shape as the arm portion 612, and comprises a third slanted portion 920 located on the first slanted portion 6120, and a fourth slanted portion 921 extending forwards from the third slanted portion 920. The fourth slanted portion 921 is located on the corresponding second slanted portion 6121. A pair of connecting portions 93 are defined on lateral sides of a front section of the metallic member 9 for cooperating with a pair of semi-circular holes of the base portion 1 and engaged with the two positioning posts 1224.

Referring to FIGS. 5-6, a complementary connector (not shown) mated with the electronic module 100 has a cage 200. The cage 200 is structured in a rectangular shape and has a receiving room formed therein for receiving a body portion of the electronic module 100. The cage 200 defines a first tab 201 having a through hole 202 formed on a rear end thereof and a pair of second tabs 203 located at two sides of the first tab 201 for cooperating with two first fingers 53 of the gasket 5.

Referring to FIGS. 1-4, and in conjunction with FIGS. 5-8, in assembly, the insulative jacket 40 of a front segment of the cable 4 is decorticated. And, then the wires 41 are exposed outside and soldered to the second conductive pads of the printed circuit board 3. And the insulator 43 is formed around a connecting portion between the wires 41 and the printed circuit board 3.

The printed circuit board 3 is assembled into the base portion 1 and received in the receiving space 110 of the base portion 1. Simultaneously, the printed circuit board 3 is located on the first standoffs 1112 and the second standoffs 1113 of the base portion 1. And the situating posts 1114 are inserted into the positioning holes 32 of the printed circuit board 3 to position the printed circuit board 3 to the base portion 1.

The cable holder member 42 of the cable 4 is partially received into the first position slot 1202 of the base portion 1. The panel portion 2 is assembled to the base portion 1 with the pair of lateral flange members 211, 212 extending into the receiving space 110. The supporting posts 2133 attach to a bottom surface of the printed circuit board 3. The two situating posts 1114 are received into the first and second apertures 2134, 2135. As the first and second apertures 2134, 2135 have different opening facing directions. So the panel portion 2 is positioned with the base portion 1 along a front to rear direction. The protrusion portion 2132 of the panel portion 2 is received into the beam portion 114 of the base portion 1. The cable holder member 42 is totally received into the first and second position slots 1202, 2202.

The slider member 61 is assembled into the second channel 1221 of the first mounting portion 12. The projection 1222 of the base portion 1 is slideable received in the groove 615 along a mating direction, the elastic portions 614 are received in the two fixing passages 1223, and the arm portions 612 are received in the pair of recesses 1138.

The gasket 5 surrounds the rear out surface of the housing (not figured). The pair of vertical sides 5a, 5b are received into the pair of first depression portions 1110. The lower side 5c is received into the second depression portions 2130 of the panel portion 2. The pair of upper walls 5d are respectively received into the pair of sunken portions 1134. The tiny post 1137 formed in the indentation 1135 is passed through the circular hole 54.

The metallic member 9 is assembled to a top surface of the first mounting portion 12 and covered to the body portion 611 of the slider member 61. The contacting portions 92 are abutting against to the corresponding arm portions 612, the connecting portions 93 are disposed in the semi-circular holes of the base portion 1. The opening 91, the screw hole 1212, the through hole 2211 are in alignment with each other along a vertical direction. A pair of fasteners or screws 8 are respectively passed through the opening 91, the screw hole 1212, the through hole 2211 to engage with the metallic member 9, the base portion 1 and the panel portion 2 together.

When the electronic module 100 is received into the cage 200 of the complementary connector, the locking piece 1133 is passed through the through hole 202 of the first tab 201. The contacting portions 92 are located above the first tab 201 and on both sides of the through hole 202, the second tabs 203 are adjacent to the first fingers 53. Thus, the electronic module 100 is interlocked with the cage 200.

And, the arm portions 612 will move upwardly when the slider member 61 is exerted by a pulling force along a front to rear direction. And, the first tab 201 will be raised up by the contacting portions 92 which is moved upwardly. At this time, the locking piece 1133 is disengaged with first tab 201. As a result, the electronic module 100 can be discreted from the cage 200. The elastic portions 614 will provide an elastic restoring force to promote the slider member 61 reset as the pull tape 62 is released. Understandably, the features of the instant invention are to provide a slider member equipped with a projecting section around the locking piece so as to, via assistant of the slanted portion, have the rearward movement of the slider member result in outward deflection of the locking tab of the cage, either directly or indirectly, for release of the module from the cage.

It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrated only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.