CN212277447U - Electric connector assembly - Google Patents

Abstract

An electric connector assembly comprises a circuit board and an electric connector module fixed on one surface of the circuit board, wherein the electric connector module forms a plugging space along the plugging direction of a butting connector and forms an insertion hole for the plugging of the butting connector, the electric connector assembly also comprises a back heat dissipation module, the back heat dissipation module comprises a back part attached to the other surface of the circuit board, and at least partial position between the electric connector module and the back heat dissipation module realizes heat conduction so that the electric connector assembly has better heat dissipation performance.

Description

Electric connector assembly

[ technical field ] A method for producing a semiconductor device

The embodiment of the application relates to the field of communication transmission, in particular to an electric connector assembly.

[ background of the invention ]

A gigabit interface connector (GBIC) is a hot-pluggable input/output device that plugs into a gigabit ethernet port/slot responsible for connecting the port to a fiber optic network. GBIC can be used and interchanged on various Cisco products, and can be mixed port by port with 1000BaseSX, 1000BaseLX/LH or 1000BaseZX interfaces that conform to IEEE 802.3 z. Further, Cisco is offering a 1000BaseLX/LH interface that fully complies with the IEEE 802.3z1000BaseLX standard, but has a transmission distance on single mode fiber of up to 10 kilometers, 5 kilometers more than the normal 1000BaseLX interface. In summary, as new functions are continuously developed, it will be easier to upgrade these modules to the latest interface technologies, thereby maximizing customer investment.

These conventional plug-in designs have been successful in the past, but they tend not to meet the goals of continued miniaturization in the industry. It is desirable to miniaturize transceivers to increase port density associated with network connections such as switchboxes, cable patch panels, wiring closets, and computer input/output (I/O). Conventional pluggable module configurations are unable to meet these parameter requirements.

A new standard has been published and is referred to herein as the hot-plug (SFP) standard, which is an abbreviation for SmallForm-factor plug, and may be simply understood as an upgraded version of GBIC. The SFP module has a half of volume reduction compared with the GBIC module, and the number of ports which is more than one time can be configured on the same panel. The other functions of the SFP module are substantially identical to the GBIC. Some switch vendors call SFP modules as miniaturized GBIC (MINI-GBIC).

At present, the QSFP-DD (Small Form-factor plug-able Double sensitivity) is developed, and the QSFP-DD specification is published, which defines a high-speed communication module with eight channels. The running speed of each channel is 25Gbit/s or 50Gbit/s, so that the QSFP-DD module supports 200Gbit/s or 400Gbit/s Ethernet application. At the same time of speed improvement, the speed is more suitable for miniaturization design. After the SFP and QSFP are fixed to the circuit board, the matching with the circuit board and the space utilization rate are also important in design, so that the utilization rate of the internal space of the electronic device can be integrally improved, the integration level is improved, and in addition, along with the continuous improvement of the transmission rate, the heat dissipation design requirement of the product is higher and higher, and the traditional design can not meet the performance requirement which is improved day by day at present.

Accordingly, there is a need for an improved interface connector of the type known in the art that overcomes the deficiencies of the prior art.

[ Utility model ] content

An object of the present application is to provide a new electrical connector assembly with better heat dissipation performance.

In order to achieve the above purpose, the present application is implemented by the following technical solutions:

an electric connector assembly comprises a circuit board and an electric connector module fixed on one surface of the circuit board, wherein the electric connector module forms a plugging space along the plugging direction of a butting connector and forms a plugging hole for the plugging of the butting connector, the electric connector assembly also comprises a back heat dissipation module, the back heat dissipation module comprises a back part attached to the other surface of the circuit board, and at least partial position between the electric connector module and the back heat dissipation module realizes heat conduction.

Furthermore, the circuit board at least partially forms a yielding hole at a position corresponding to the connector module along the thickness direction, and the electric connector module and the back heat dissipation module penetrate through the yielding hole to be directly or indirectly overlapped with each other to realize heat conduction.

Furthermore, the electric connector assembly comprises an elastic sheet component, the elastic sheet component is fixed at the position, close to one side of the circuit board, of the electric connector assembly, the elastic sheet component comprises an inner side elastic arm protruding towards the plugging space and an outer side elastic arm protruding towards the direction far away from one side of the plugging space, the inner side elastic arm is used for being in lap joint with the butting connector, and the outer side elastic arm is in lap joint with the back heat dissipation module to achieve heat conduction.

Furthermore, the yielding hole is located at a position, close to the insertion hole, of the circuit board, and the yielding hole penetrates through the circuit board along the thickness direction of the circuit board and is open in the pulling-out direction of the butting connector.

Furthermore, the electric connector module comprises a terminal module and a metal casing, the terminal module comprises an insulating body and a plurality of signal terminals fixed with the insulating body, the signal terminal part protrudes into the plugging space and corresponds to the butting connector to realize signal transmission, the signal terminal part protrudes out of the insulating body and is correspondingly electrically connected with the circuit board, the metal cover shell is covered on the periphery of the terminal module and comprises a top plate and two side plates which are oppositely arranged, the top plate, the two side plates and the terminal module define the plugging space together, the electric connector assembly further comprises a metal frame, the metal frame is fixed at the position of one side of the metal cover shell close to the circuit board and comprises a bottom plate component, the bottom plate component is located at the lower position corresponding to the plugging space, and the elastic piece component is fixed on the bottom plate component.

Furthermore, the metal frame comprises a side frame body part which is fixed on one side of the side plate of the metal cover shell and is close to the circuit board, the bottom plate component is positioned at the position of the electric connector component close to the insertion opening, the bottom plate component is integrally connected with the side frame body part, and the elastic sheet component is used for overlapping the bottom plate component and the back heat dissipation module to realize heat conduction.

Furthermore, the electric connector assembly also comprises a fixing pin which penetrates through the back heat dissipation module and the circuit board to integrally fix the back heat dissipation module, the circuit board and the metal frame.

Furthermore, the electric connector assembly comprises at least two electric connector modules, adjacent side plates of the metal cover casing of the two adjacent electric connector modules are integrally fixed through the same side frame body part, the metal frame further comprises a rear frame body part located at one end position, far away from the insertion hole, of the metal cover casing, and the rear frame body part is integrally connected with the side frame body part.

Furthermore, the electric connector assembly further comprises a top heat dissipation module and a heat dissipation fin support, wherein the top heat dissipation module is attached to the upper portion of the metal casing, and the heat dissipation fin support locks the top heat dissipation module to the metal casing.

Furthermore, the back side heat dissipation module comprises a thickened part which protrudes into the yielding hole along the thickness direction of the circuit board, and the area of mutual stacking and laminating of the back side heat dissipation module and the electric connector assembly along the thickness direction of the circuit board is larger than one half of the total area of the electric connector assembly along the extending direction of the circuit board.

Furthermore, each of the plugging spaces is matched with a plurality of the signal terminals, at least one pair of high-speed terminals for transmitting high-speed differential signals is included in the plurality of signal terminals matched with each of the plugging spaces, and the electrical connector assembly is one of an SFP socket connector, a QSFP-DD socket connector or a CXP socket connector.

Compared with the prior art, the method has the following beneficial effects: the heat dissipation performance is better.

[ description of the drawings ]

Fig. 1 is a perspective view of an electrical connector assembly of the present application;

fig. 2 is a perspective view of the electrical connector assembly of the present application from another angle;

fig. 3 is a partially exploded perspective view of the electrical connector assembly of the present application, showing the top heat dissipating module, the metal member and the heat sink bracket separated from the metal housing, further wherein the metal member and the heat sink bracket are engaged with each other;

fig. 4 is a further exploded isometric view of the electrical connector assembly of fig. 3, further illustrating the metal member in perspective view from the heat sink bracket, in addition to fig. 3;

fig. 5 is a partial exploded perspective view of the electrical connector assembly of the present application, showing the heat sink bracket, the top heat dissipation module, the circuit board, and the back heat dissipation module in a perspective view after they have been separated from the metal shell;

fig. 6 is a partial exploded perspective view of the electrical connector assembly of the present application;

fig. 7 is a partial exploded perspective view of the electrical connector assembly of the present application, which mainly shows the perspective view of the socket spring and the socket metal piece separated from the metal shell, in addition, the metal frame, the back heat dissipation module, the top heat dissipation module and the circuit board are removed;

fig. 8 is a partially exploded perspective view of the electrical connector assembly of the present application, which mainly shows a perspective view of the socket spring, the socket metal piece, the metal frame and one of the spring members separated from the metal housing, in which the metal frame, the back side heat dissipation module, the top side heat dissipation module and the circuit board are removed;

fig. 9 is a partial exploded perspective view of the electrical connector assembly of the present application, which mainly shows the perspective view of the socket spring, three spring members, and one connector module separated from the metal frame, with the metal frame, the back heat dissipation module, the top heat dissipation module, and the circuit board removed;

fig. 10 is a partially exploded perspective view of the electrical connector assembly of the present application, which mainly shows the three-dimensional view of the socket spring, three of the spring members, two of the connector modules, and a metal part separated from the metal frame, further showing the matching relationship between a metal part and a corresponding metal cover, and in addition, removing the metal frame, the back heat dissipation module, the top heat dissipation module, and the circuit board.

[ detailed description ] embodiments

It should be noted that the embodiments and features of the embodiments in the application may be combined with each other without conflict. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the application can be understood by those of ordinary skill in the art as the case may be.

In the description of the application, it is to be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In addition, for the accuracy of description of the present application, the direction of the present application is uniformly referred to as fig. 1, wherein the extending direction of the X axis is the left-right direction (i.e. the arrangement direction of the insertion spaces 10, wherein the positive direction of the X axis is the right direction); the extending direction of the Y axis is the front-back direction (namely the plugging direction of the butting connector, wherein the positive direction of the Y axis is the back); the Z-axis extending direction is the up-down direction (i.e., the thickness direction of the circuit board 200, in which the Z-axis positive direction is upward). The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 10, an electrical connector assembly for signal transmission with at least one mating connector (not shown) is disclosed. The electrical connector assembly includes a circuit board 200, an electrical connector module (not numbered) fixed on the upper surface of the circuit board 200, a top heat dissipation module 5 and a back heat dissipation module 7. The top heat dissipation module 5 is fixed to an upper surface of the electrical connector module, and the back heat dissipation module 7 is fixed to a lower surface of the circuit board 200 and is capable of heat conduction with the electrical connector module.

Referring to fig. 8, the electrical connector module includes a terminal module 1, a metal housing 2, a metal member 3 and a metal frame 4. The terminal module 1 includes an insulating body 11 and a plurality of signal terminals 12 fixed to the insulating body 11. Each of the signal terminals 12 includes a fixing portion (not labeled) fixed in the insulating housing 11, a contact portion (not labeled) extending forward from the fixing portion to the insulating housing 11, and a butt-joint portion (not labeled) extending downward from the fixing portion to the insulating housing 11. The contact part is used for being butted with the butting connector to realize signal transmission. The mating portion is electrically connected to the circuit board 200 correspondingly, so as to realize signal transmission with a metal trace (not shown) on the circuit board 200.

Referring to fig. 10, the metal shell 2 is covered on the periphery of the terminal module 1. The metal shell 2 includes two side plates 21 extending in the front-rear direction and the up-down direction, a top plate 22 extending in the front-rear direction and the left-right direction, and a rear end plate 23 extending in the up-down direction and the left-right direction. The top plate 22 is connected with the upper end edges of the two side plates 21, and the rear end plate 23 is connected with the rear end edge of the top plate 22 and is fixed with the outer side of the rear end positions of the two side plates 21 in a buckling mode to form three faces similar to a cuboid. The top plate 22 is substantially parallel to the upper surface of the circuit board 200.

Referring to fig. 1 to 4, the terminal module 1 and the metal shell 2 together define an insertion space 10 extending in the front-back direction and an insertion opening 101 into which a mating connector is inserted. The contact portions of the signal terminals 12 are exposed to the insertion space 10. In this application, terminal module 1 is equipped with four independent, metal casing 2 is equipped with four independent, metalwork 3 is equipped with four independent. Of course, in another embodiment, the terminal modules 1 may be designed to be integrally disposed at local positions directly or indirectly, for example, to be integrally connected at the rear end of the insulating body 11, or to fix the insulating bodies 11 of four terminal modules 1 together by another independent member (not shown), or other similar designs.

Referring to fig. 8 to 10, the four metal housings 2 are arranged in a left-right direction, and an interval space 20 is formed between two adjacent metal housings 2, specifically, the interval space 20 is formed by two adjacent side plates 21 of two adjacent metal housings 2. The metal frame 4 is formed by die casting a metal powder, and includes side frame portions 401 fixed to lower side edges of the side plates 21 of the metal shell 2, a rear frame portion 402 connecting rear end edges of the side frame portions 401, and a bottom plate member 403 connecting front end positions of two adjacent side frame portions 401, and the bottom plate member 403 is positioned at a position corresponding to a lower portion of the insertion/removal space 10.

Referring to fig. 8 to 10, in the present application, the side plate 21 of each metal casing 2 is fixed to the side frame portion 401, specifically, a locking plate 214 is formed on the lower edge of the side plate 21 of the metal casing 2 in an extending manner, a locking hole 42 penetrating in the vertical direction is formed in a corresponding position of the side frame portion 401, and the locking plate 214 of the metal casing 2 passes through the locking hole 42 and is fastened to the lower surface of the side frame portion 401. In the present application, the side frame 401 includes a main body portion 4011 and wing portions 4012 formed by extending from positions below the left and right sides of the main body portion 4011 (positions near the circuit board 200) in the left and right directions. The locking hole 42 is formed at the position where the wing portion 4012 is adjacent to the main body portion 4011, and the lower position of the side plate 21 corresponds to the left and right side surfaces abutting against the main body portion 4011. The clearance gap 20 is formed between the main body portion 4011 of the metal frame 4 and the two side plates 21 of the adjacent main body portion 4011.

As shown in fig. 1 to 4, the metal member 3 is fixed in the gap 20, in the present application, the metal member 3 is formed by stamping and bending a metal plate, a part of the metal member 3 extends in the left-right direction and further extends upward to form elastic arm portions 31, and the elastic arm portions 31 respectively and elastically support the side plates 21. The side plate 21 forms a stop portion 211 at a free end position of the elastic arm portion 31, and the free end of the elastic arm portion 31 is stopped upward at the stop portion 211. The side frame body 401 penetrates through the space 20 along the vertical direction to form a latch hole 41 (specifically, the latch hole 41 is formed on the main body 4011), the metal piece 3 extends downward corresponding to the latch hole 41 to form a latch arm 34, and the latch arm 34 penetrates through the latch hole 41 and is fastened with one side of the side frame body 401 close to the circuit board 200. In the present application, the lower edge of the metal fitting 3 and/or the resilient arm portion 31 of the metal fitting 3 are supported by the side frame portion 401 (specifically, the upper surface of the main body portion 4011).

As shown in fig. 1 to 4, in the present application, the metal member 3 is bent at a position close to the insertion opening 101 in the space 20 to form a supporting plate 32, at least a part of the structure of the supporting plate 32 extends along the left-right direction and the up-down direction, the supporting plate 32 supports the side plate 21 along the left-right direction, a plurality of through holes 320 are formed in the supporting plate 32 along the front-back direction, and the through holes 320 are used for air circulation, which is beneficial for heat dissipation. The metal fitting 3 is bent at a position of the spacing space 20 close to the insertion port 101 to form an elastic arm 33 extending in the insertion direction of the butting connector, and the elastic arm 33 elastically abuts against the corresponding side plate 21 in a simple support shape.

The spacing space 20 extends continuously from one end of the metal casing 2 to the other end (specifically, continuously from one end of the connector module to the other end in this embodiment) along the front-back direction, that is, the spacing space 20 penetrates through the connector module along the front-back direction, and the spacing space 20 forms an air duct, so that the connector module has a better heat dissipation effect. At least one metal piece 3 is arranged in the same spacing space 20, and the sum of the lengths of all the metal pieces 3 in the same spacing space 20 along the front-back direction is not less than half of the length of the spacing space 20 along the plugging direction of the butting connector.

Referring to fig. 3, 4 and 10, in the present application, the metal piece 3 extends downward (toward the circuit board 200) at a position close to the insertion opening 101 to form a buckle piece 35 (specifically, the buckle piece 35 is formed by further extending downward from the lower edge of the supporting plate 32), the metal frame 4 forms a buckle portion 42 corresponding to the buckle piece position, and the buckle piece 35 and the buckle portion 42 are buckled to realize mutual limiting along the vertical direction and/or the horizontal direction.

As shown in fig. 6 to 10, in the present application, the electrical connector assembly further includes a socket metal piece 9, the socket metal piece 9 is disposed in front of the bottom plate member 403 along a pulling direction of the mating connector, two sides of the socket metal piece 9 are correspondingly spliced and fixed or fastened to two side plates 21 of the metal housing 2, the socket metal piece 9 and the metal housing 2 are substantially flush with an end edge of the insertion opening 101, the socket metal piece 9, the top plate 22 and the side plates 21 are fixedly provided with socket elastic pieces 24 at end edges of the insertion opening 101, and the socket elastic pieces 24 are formed with inner elastic pieces 241 extending into the insertion space 10 and outer elastic pieces 242 extending toward an outer side direction of the insertion space 10.

As shown in fig. 6 to 10, in the present application, the side frame portion 401, the rear frame portion 402 and the bottom plate 403 of the metal frame 4 below the same metal casing 2 enclose a frame shape, and a relief opening 300 is formed in the middle, the terminal module 1 is disposed at the relief opening 300, the signal terminal 12 extends downward and protrudes out of the insulating body 11 through the relief opening 300 for being abutted with the circuit board 200, so as to implement signal transmission.

Further, in this application, a plurality of signal terminal 12 of same terminal module 1 forms two rows of settings along upper and lower direction, at least one row signal terminal includes the high-speed terminal of at least a pair of transmission high-speed differential signal, electric connector assembly is actually one of SFP socket connector or QSFP-DD socket connector or CXP socket connector.

Referring to fig. 8, 9 and 10, in the present application, the side plate 21 penetrates through the left and right direction to form the vent hole 215, the metal shell 2 further includes a rear end plate 23 extending along the thickness direction of the circuit board 200 and the arrangement direction of the two insertion and extraction spaces 10 (the rear end plate 23 is actually formed by bending and extending the rear end edge of the top plate 22 downward), the rear frame portion 402 of the metal frame 4 is located at the rear position of the terminal module 1, and the rear end plate 23 is located at the rear position of the rear frame portion 402; so that a gap 102 is formed between the rear end plate 23 and the terminal module 1 above the rear frame portion 402. The rear end plate 23 forms a vent hole (not shown) along the plugging direction of the butting connector.

In this application, the electrical connector assembly further includes a top heat dissipation module 5, the top heat dissipation module 5 is fixed on the outer surface of the top plate 22 of the metal casing 2, the top heat dissipation module 5 is formed with a fitting hole 51 communicated with the spacing space 20 at a position corresponding to the spacing space 20 along the thickness direction of the circuit board 200.

As shown in fig. 1 to 6, the electrical connector assembly further includes a heat sink bracket 6, the heat sink bracket 6 straddles above the top heat dissipation module 5 along the arrangement direction of the two insertion and extraction spaces 10, two ends of the heat sink bracket 6 along the arrangement direction of the two insertion and extraction spaces 10 form a buckle arm 61 extending towards the direction of the circuit board 200, the buckle arm 61 is correspondingly buckled outside two side plates 21 at two ends of the metal housing 2 along the arrangement direction of the two insertion and extraction spaces 10, a buckle 36 is formed by extending a side position of the metal piece 3 away from the circuit board 200, and the buckle 36 is correspondingly buckled and fixed with the heat sink bracket 6.

Referring to fig. 1 to 6, in the present application, the back heat dissipation module 7 includes a back portion 71 and a thickened portion 72, which are attached to the lower surface of the circuit board 200, and at least a partial position between the electrical connector module and the back heat dissipation module 7 realizes heat conduction. Specifically, the circuit board 200 is along the upper and lower direction at least partially form the hole 201 of stepping down in the position that corresponds with the connector module, specifically, along the fore-and-aft direction on the hole 201 of stepping down is located circuit board 200 front end position (the position that is close to inserted hole 101), the hole 201 of stepping down runs through circuit board 200 thickness direction and forward becomes the opening form. The electric connector module and the back heat dissipation module 7 pass through the abdicating hole 201 and are mutually lapped to realize heat conduction. More specifically, the electrical connector assembly further includes a spring member 8, and the spring member 8 is fixed on the bottom plate member 403 of the metal frame 4.

As shown in fig. 6 to 10, the elastic sheet member 8 includes an inner plate 801 attached to the upper surface (the surface away from the circuit board 200) of the bottom plate member 403 and an outer plate 802 attached to the lower surface (the surface close to the circuit board 200) of the bottom plate member 403. The inner plate 801 and the outer plate 802 are disposed to face each other in the vertical direction and integrally connected at the front end edge position, and the floor member 403 is sandwiched between the inner plate 801 and the outer plate 802. The inner side plate 801 is formed at a local position by stamping, bending and extending from front to back to form an inner side elastic arm 81, and the inner side elastic arm 81 protrudes into the plugging space 10 to be abutted against the butting connector to realize heat conduction and realize effective plugging force between the butting connector and the electric connector assembly. The local position of outer panel 802 is by preceding back through the punching press and bend the extension and be formed with outside bullet arm 82, outside bullet arm 82 is used for realizing heat-conduction with back heat dissipation module 7 elastic lapping, specifically, thickening portion 72 at least part is protruding to in stepping down hole 201 and correspond and outside bullet arm 82 lapping realizes heat-conduction. In this arrangement, the inner spring arm 81 and/or the outer spring arm 82 extend in a cantilever or a simple-supported manner in the insertion direction of the mating connector.

Referring to fig. 2 and fig. 5 and fig. 6, the electrical connector assembly further includes a plurality of fixing pins 202, wherein the fixing pins 202 penetrate through the back heat dissipation module 7 and the circuit board 200 to integrally fix the back heat dissipation module 7, the circuit board 200 and the metal frame 4, and specifically, the fixing pins 202 are screwed with the side frame portion 401 of the metal frame 4. The metal frame 4 is fixed to the circuit board 200 by bolts (not numbered) at a partial position outside the metal casing 2. In the application, the metal housing 2 is a metal die casting, and the local position of the metal housing 2 can be manufactured to have thicker thickness and strong plasticity. The electrical connector assembly can have a strong structural strength at least at one side of the circuit board 200 and a better heat dissipation effect, and particularly, the design of the bottom plate member 403 enables the high heat generating portion of the mating connector to effectively conduct and dissipate heat through the bottom plate member 403.

Because the metal part 3 of metal material is heat-conducting faster, combine the design of this application, set up metal part 3 in interval space 20, and contact with curb plate 21 of housing metal 2 and side casing part 401 of metal crate 4 through a plurality of positions, the perforating hole 320 on the cooperation backup pad 32, air vent 215 on curb plate 22 and the back end plate 23 simultaneously, and the mating holes 51 on the radiating module 5 in top, when guaranteeing to have great metal heat radiating area, can realize the circulation of air, have fine radiating effect. In addition, for better heat dissipation effect, the back side heat dissipation module 7 and the metal frame 4 realize heat conduction, and the area of the back side heat dissipation module 7 and the electrical connector assembly stacked and attached to each other along the up-down direction is greater than one half of the total area of the electrical connector assembly along the extending direction of the circuit board 200. The back side heat dissipation module 7 is locally designed to be attached to the lower surface of the circuit board 200, so that the effective heat dissipation area of the back side heat dissipation module 7 can be maximized while the area of the circuit board occupied by the electric connector assembly is not increased, and a better heat dissipation effect is realized.

Although the present application has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.

The above description is only a part of the embodiments of the present application, and not all embodiments, and any equivalent changes to the technical solutions of the present application, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present application.

Claims (11)

1. The utility model provides an electric connector assembly, includes circuit board and is fixed in the electric connector module of a circuit board surface, electric connector module forms plug space and forms the inserted hole that supplies the butt joint connector to insert along butt joint connector plug direction, its characterized in that: the back heat dissipation module comprises a back portion attached to the other surface of the circuit board, and heat conduction is achieved at least in a local position between the electric connector module and the back heat dissipation module.

2. The electrical connector assembly of claim 1, wherein: the circuit board forms the hole of stepping down at least locally in the position that corresponds with the connector module along thickness direction, pass the hole of stepping down and direct or indirect overlap joint realization heat-conduction each other between electric connector module and the back heat dissipation module.

3. The electrical connector assembly of claim 2, wherein: the electric connector assembly comprises an elastic sheet component, the elastic sheet component is fixed at the position, close to one side of the circuit board, of the electric connector assembly, the elastic sheet component comprises an inner side elastic arm protruding towards the plugging space and an outer side elastic arm protruding towards the direction far away from one side of the plugging space, the inner side elastic arm is used for being in lap joint with a butting connector, and the outer side elastic arm is in lap joint with the back heat dissipation module to achieve heat conduction.

4. The electrical connector assembly of claim 2, wherein: the abdicating hole is positioned at the position of the circuit board close to the insertion hole, penetrates through the circuit board along the thickness direction of the circuit board and is open towards the pulling-out direction of the butting connector.

5. The electrical connector assembly of claim 3, wherein: the electric connector module comprises a terminal module and a metal casing, the terminal module comprises an insulating body and a plurality of signal terminals fixed with the insulating body, the signal terminal part protrudes into the plugging space and corresponds to the butting connector to realize signal transmission, the signal terminal part protrudes out of the insulating body and is correspondingly electrically connected with the circuit board, the metal cover shell is covered on the periphery of the terminal module and comprises a top plate and two side plates which are oppositely arranged, the top plate, the two side plates and the terminal module define the plugging space together, the electric connector assembly further comprises a metal frame, the metal frame is fixed at the position of one side of the metal cover shell close to the circuit board and comprises a bottom plate component, the bottom plate component is located at the lower position corresponding to the plugging space, and the elastic piece component is fixed on the bottom plate component.

6. The electrical connector assembly of claim 5, wherein: the metal frame comprises a side frame body part which is fixed on one side of a side plate of the metal cover shell and is close to the circuit board, the bottom plate component is positioned at the position of the electric connector component close to the insertion opening, the bottom plate component is integrally connected with the side frame body part, and the elastic sheet component is used for realizing heat conduction by lapping the bottom plate component and the back heat dissipation module.

7. The electrical connector assembly of claim 6, wherein: the electric connector assembly further comprises a fixing pin which penetrates through the back side heat dissipation module and the circuit board to integrally fix the back side heat dissipation module, the circuit board and the metal frame.

8. The electrical connector assembly of claim 6, wherein: the electric connector assembly comprises at least two electric connector modules, adjacent side plates of the metal cover casing of the two adjacent electric connector modules are integrally fixed through the same side frame body part, the metal frame further comprises a rear frame body part located at one end position, far away from the insertion hole, of the metal cover casing, and the rear frame body part is integrally connected with the side frame body part.

9. The electrical connector assembly of claim 5, wherein: the electric connector component further comprises a top heat dissipation module and a heat dissipation fin support, the top heat dissipation module is attached to the upper portion of the metal housing, and the heat dissipation fin support enables the top heat dissipation module to be locked on the metal housing.

10. The electrical connector assembly of claim 2, wherein: the back side heat dissipation module comprises a thickened part which protrudes into the yielding hole along the thickness direction of the circuit board, and the area of mutual stacking and laminating of the back side heat dissipation module and the electric connector assembly along the thickness direction of the circuit board is larger than one half of the total area of the electric connector assembly along the extending direction of the circuit board.

11. The electrical connector assembly of claim 5, wherein: each plug space is matched with a plurality of signal terminals, at least one pair of high-speed terminals for transmitting high-speed differential signals is arranged in the plurality of signal terminals matched with each plug space, and the electric connector assembly is one of an SFP socket connector, a QSFP-DD socket connector or a CXP socket connector.

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