An electrical connector assembly

Abstract

An electrical connector assembly includes a circuit board and an electrical connector module fixed to one surface of the circuit board. The electrical connector module forms an insertion and extraction space along the insertion and extraction direction of the docking connector and forms an insertion port for the docking connector to be inserted. It further includes a backside heat dissipation module. The backside heat dissipation module includes a back portion that abuts against the other surface of the circuit board. At least a partial position between the electrical connector module and the backside heat dissipation module realizes heat conduction, so that the electrical connector assembly has better heat dissipation performance.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication transmission, and in particular, to an electrical connector assembly.

Background Art

[0002] A Gigabit Interface Converter (GBIC) is a hot-pluggable input / output device that is inserted into a Gigabit Ethernet port / slot and is responsible for connecting the port to a fiber optic network. GBICs can be used and interchanged on various Cisco products and can be mixed with 1000BaseSX, 1000BaseLX / LH, or 1000BaseZX interfaces compliant with IEEE 802.3z on a per-port basis. Further, Cisco is offering a 1000BaseLX / LH interface that fully complies with the IEEE 802.3z 1000BaseLX standard, but its transmission distance on single-mode fiber is up to 10 kilometers, which is 5 kilometers farther than that of a common 1000BaseLX interface. In summary, with the continuous development of new functions, it will be easier to upgrade these modules to the latest interface technology, thus maximizing the benefits of customer investment.

[0003] In the past, these traditional plug-in designs have been successful, but they tend not to achieve the goal of continuous miniaturization in the industry. It is desired to miniaturize transceivers to increase the port density associated with network connections such as distribution boxes, cable patch panels, wiring closets, and computer input / output (I / O). Traditional pluggable module configurations cannot meet these parameter requirements.

[0004] Currently, a new standard has been announced and is herein referred to as the Small Form-factor Pluggable (SFP) standard. SFP is an abbreviation for Small Form-factor Pluggable and can be simply understood as an upgraded version of GBIC. The volume of the SFP module is reduced by half compared to the GBIC module, and more than twice the number of ports can be configured on the same panel. Other functions of the SFP module are basically the same as those of the GBIC. Some switch manufacturers refer to the SFP module as a Miniature GBIC (MINI-GBIC).

[0005] At present, it has developed to the QSFP-DD (Quad Small Form-factor Pluggable Double Density) stage, and the QSFP-DD specification has also been announced, which defines a high-speed communication module with eight channels. The operating rate of each channel is 25 Gbit / s or 50 Gbit / s, so the QSFP-DD module supports Ethernet applications with a rate of 200 Gbit / s or 400 Gbit / s. While the rate is increasing, it is more and more inclined to miniaturized design. After such SFP and QSFP are fixed to the circuit board, the cooperation with the circuit board and the space utilization rate are also the key points of the design, which can overall improve the space utilization rate inside the electronic device and increase the integration degree. In addition, with the continuous improvement of the transmission rate, the heat dissipation design requirements of the product itself are also getting higher and higher, and the traditional design can no longer meet the increasingly improved performance requirements.

[0006] Therefore, it is necessary to improve such interface connectors in the prior art to overcome the above-mentioned defects in the prior art.

Summary of the Invention

[0007] The purpose of this application is to provide a new electrical connector assembly with better heat dissipation performance.

[0008] To achieve the above purpose, this application is realized through the following technical solutions:

[0009] An electrical connector assembly includes a circuit board and an electrical connector module fixed on one surface of the circuit board. The electrical connector module forms an insertion and extraction space along the insertion and extraction direction of the docking connector and forms an insertion port for the docking connector to insert. It further includes a back surface heat dissipation module. The back surface heat dissipation module includes a back surface portion that abuts against the other surface of the circuit board. At least a partial position between the electrical connector module and the back surface heat dissipation module realizes heat conduction.

[0010] Further, at least partially a relief hole is formed in the circuit board along the thickness direction at a position corresponding to the connector module. The electrical connector module and the back surface heat dissipation module are directly or indirectly overlapped through the relief hole to realize heat conduction.

[0011] Further, the electrical connector assembly includes a spring piece component. The spring piece component is fixed at a position close to the circuit board side of the electrical connector assembly. The spring piece component includes an inner spring arm protruding into the insertion and extraction space and an outer spring arm protruding in a direction away from the insertion and extraction space. The inner spring arm is used to overlap with the docking connector, and the outer spring arm overlaps with the back surface heat dissipation module to realize heat conduction.

[0012] Further, the relief hole is located at a position of the circuit board close to the insertion port. The relief hole penetrates the circuit board along the thickness direction of the circuit board and is open in the direction of the docking connector being pulled out.

[0013] Furthermore, the electrical connector module includes a terminal module and a metal cover, the terminal module includes an insulating body and a plurality of signal terminals fixed to the insulating body, the signal terminal portion protrudes into the plug-in space to correspond to the docking connector to realize signal transmission, the signal terminal portion protrudes out of the insulating body to correspond to the electrical connection with the circuit board, the metal cover is arranged on the periphery of the terminal module, the metal cover includes a top plate and two oppositely arranged side plates, the top plate, the two side plates and the terminal module jointly define the plug-in space, the electrical connector assembly also includes a metal frame, the metal frame is fixed to a position of the metal cover close to one side of the circuit board, the metal frame includes a bottom plate component, the bottom plate component is located at a position below the corresponding plug-in space, and the spring member is fixed on the bottom plate component.

[0014] Furthermore, the metal frame includes a side frame body fixed to the side plate of the metal cover near the side of the circuit board, the bottom plate component is located near the insertion port of the electrical connector assembly, the bottom plate component is integrally connected to the side frame body, and the spring member overlaps the bottom plate component and the back heat dissipation module to achieve heat conduction.

[0015] Furthermore, the electrical connector assembly also includes a fixing pin, which passes through the back heat dissipation module and the circuit board to fix the back heat dissipation module, the circuit board and the metal frame as a whole.

[0016] Furthermore, the electrical connector assembly includes at least two electrical connector modules, and the adjacent side panels of the metal cover shells of two adjacent electrical connector modules are integrally fixed by the same side frame body. The metal frame also includes a rear frame body located at an end of the metal cover shell away from the insertion port, and the rear frame body is integrally connected to the side frame body.

[0017] Furthermore, the electrical connector assembly also includes a top heat dissipation module and a heat sink bracket. The top heat dissipation module is attached to the top of the metal cover, and the heat sink bracket locks the top heat dissipation module to the metal cover.

[0018] Furthermore, the back heat dissipation module includes a thickened portion protruding into the clearance hole along the thickness direction of the circuit board, and the area where the back heat dissipation module and the electrical connector assembly are stacked and fitted together along the thickness direction of the circuit board is greater than one half of the total area of ​​the electrical connector assembly along the extension direction of the circuit board.

[0019] Furthermore, each of the plug-in spaces cooperates with a plurality of the signal terminals, and the plurality of the signal terminals that cooperate with each of the plug-in spaces include at least a pair of high-speed terminals for transmitting high-speed differential signals, and the electrical connector assembly is one of an SFP socket connector, a QSFP socket connector, a QSFP-DD socket connector, or a CXP socket connector.

[0020] Compared with the prior art, the present application has the following beneficial effects: It has better heat dissipation performance.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective schematic view of the electrical connector assembly of the present application;

[0022] Figure 2 is a perspective view of the electrical connector assembly of the present application from another angle;

[0023] Figure 3 is a partial perspective exploded view of the electrical connector assembly of the present application, which shows a perspective schematic view of the top heat dissipation module, the metal part and the heat sink bracket separated from the metal housing. Further, the metal part and the heat sink bracket cooperate with each other;

[0024] Figure 4 is Figure 3 a further perspective exploded view of the electrical connector assembly shown, which further shows a perspective schematic view of the separation of the metal part and the heat sink bracket on the basis of Figure 3 ;

[0025] Figure 5 is a partial perspective exploded view of the electrical connector assembly of the present application, which shows a perspective schematic view of the heat sink bracket, the top heat dissipation module, the circuit board and the back heat dissipation module separated from the metal housing;

[0026] Figure 6 is a partial perspective exploded view of the electrical connector assembly of the present application;

[0027] Figure 7 is a partial perspective exploded view of the electrical connector assembly of the present application, which mainly shows a perspective schematic view of the socket spring piece and the socket metal part separated from the metal housing. In addition, the metal frame, the back heat dissipation module, the top heat dissipation module and the circuit board are removed;

[0028] Figure 8 is a partial perspective exploded view of the electrical connector assembly of the present application, which mainly shows a perspective schematic view of the socket spring piece, the socket metal part, the metal frame and one of the spring members separated from the metal housing. In addition, the metal frame, the back heat dissipation module, the top heat dissipation module and the circuit board are removed;

[0029] Figure 9 is a partial perspective exploded view of the electrical connector assembly of the present application, which mainly shows a perspective schematic view of the socket spring piece, three of the spring members, and one of the connector modules separated from the metal frame. In addition, the metal frame, the back heat dissipation module, the top heat dissipation module and the circuit board are removed;

[0030] Figure 10FIG. 0 is a partial perspective exploded view of the electrical connector assembly of the present application, which mainly shows a perspective schematic diagram of the socket spring piece, three of the spring piece members, two of the connector modules, and a metal piece separated from the metal frame. Further, it shows the mating relationship between a metal piece and a corresponding metal housing. In addition, the metal frame, the back heat dissipation module, the top heat dissipation module, and the circuit board are removed.

DETAILED DESCRIPTION

[0031] It should be noted that, without conflict, the embodiments in the application and the features in the embodiments can be combined with each other. In addition, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the application can be understood according to specific circumstances.

[0032] In the description of the application, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0033] In addition, for the accuracy of the description of the present application, all directions related to the present application shall be based on Figure 1 as a reference, where the extension direction of the X-axis is the left-right direction (that is, the arrangement direction of each of the insertion and extraction spaces 10, where the positive direction of the X-axis is to the right); the extension direction of the Y-axis is the front-back direction (that is, the insertion and extraction direction of the docking connector, where the positive direction of the Y-axis is to the back); the extension direction of the Z-axis is the up-down direction (that is, the thickness direction of the circuit board 200, where the positive direction of the Z-axis is up). The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0034] Please refer to Figures 1 to 10 As shown, the present application discloses an electrical connector assembly for realizing signal transmission with at least one docking connector (not shown). The electrical connector assembly includes a circuit board 200, an electrical connector module (not labeled) 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 on the upper surface of the electrical connector module, and the back heat dissipation module 7 is fixed on the lower surface of the circuit board 200 and can conduct heat with the electrical connector module.

[0035] Please refer to Figure 8As shown, the electrical connector module includes a terminal module 1, a metal housing 2, a metal part 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 within the insulating body 11, a contact portion (not labeled) extending forward from the fixing portion out of the insulating body 11, and a docking portion (not labeled) extending downward from the fixing portion out of the insulating body 11. The contact portion is used to dock with a docking connector to achieve signal transmission. The docking portion is correspondingly electrically connected to the circuit board 200 to achieve signal transmission with the metal traces (not shown) on the circuit board 200.

[0036] Please refer to Figure 10 As shown, the metal housing 2 covers the outer periphery of the terminal module 1. The metal housing 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 connects the upper edge ends of the two side plates 21, and the rear end plate 23 connects the rear edge end of the top plate 22 and is snap-fixed to the outside of the rear positions of the two side plates 21 to form three faces of a similar cuboid. The top plate 22 is substantially parallel to the upper surface of the circuit board 200.

[0037] Please refer to Figures 1 to 4 As shown, the terminal module 1 and the metal housing 2 jointly define a plugging space 10 extending in the front-rear direction and form an insertion port 101 for the docking connector to insert. The contact portions of the signal terminals 12 are exposed into the plugging space 10. In this application, there are four independent terminal modules 1, four independent metal housings 2, and four independent metal parts 3. Of course, in another embodiment, the terminal module 1 can also be designed to be integrally provided directly or indirectly at a local position, such as integrally connecting at the rear position of the insulating body 11 locally, or fixing the insulating bodies 11 of the four terminal modules 1 together through another independent component (not shown), or other similar designs.

[0038] Please refer to Figures 8 to 10 As shown, the four metal housings 2 are arranged side by side in the left-right direction, and there is a gap between adjacent two of the metal housings 2 to form a gap space 20. Specifically, the gap space 20 is formed by the gaps between the adjacent two side plates 21 of the adjacent two metal housings 2. The metal frame 4 is formed by metal powder die-casting and includes a side frame body portion 401 fixed to the lower edge of the side plate 21 of the metal housing 2, a rear frame body portion 402 connecting the rear edge end of the side frame body portion 401, and a bottom plate member 403 connecting the front positions of the adjacent two side frame body portions 401. The bottom plate member 403 is located below the corresponding plugging space 10.

[0039] Please refer toFigures 8 to 10 As shown, in the present application, the side plates 21 of each of the metal enclosures 2 are fixedly connected to the side frame portions 401. Specifically, a locking plate 214 is formed by extending the lower edge of the side plate 21 of the metal enclosure 2. A locking hole 42 penetrating in the up and down direction is formed at the corresponding position of the side frame portion 401. The locking plate 214 of the metal enclosure 2 passes through the locking hole 42 and is fastened to the lower surface of the side frame portion 401. Further, in the present application, the side frame portion 401 includes a main body portion 4011 and wing portions 4012 respectively extending in the left and right directions from positions near the lower sides (near the circuit board 200) of the left and right sides of the main body portion 4011. The locking hole 42 is formed at a position of the wing portion 4012 adjacent to the main body portion 4011. The lower positions of the side plates 21 are correspondingly abutted against the left and right side surfaces of the main body portion 4011. A clearance gap 20 is formed between the main body portion 4011 of the metal frame 4 and the two side plates 21 of adjacent main body portions 4011.

[0040] Please refer to Figures 1 to 4 As shown, the metal member 3 is fixedly disposed in the clearance gap 20. In the present application, the metal member 3 is formed by stamping and bending a metal plate. A partial position of the metal member 3 extends in the left and right directions and further extends upward to form elastic arm portions 31. The elastic arm portions 31 respectively elastically support the side plates 21. A stop portion 211 is formed at the free end position of the side plate 21 corresponding to the elastic arm portion 31. The free ends of the elastic arm portions 31 are stopped upward at the stop portion 211. A locking hole 41 is formed through the side frame portion 401 in the up and down direction at the position of the clearance space 20 (specifically, the locking hole 41 is formed on the main body portion 4011). The metal member 3 extends downward at a position corresponding to the locking hole 41 to form a locking arm 34. The locking arm 34 passes through the locking hole 41 and is fastened to a side of the side frame portion 401 close to the circuit board 200. In the present application, the lower edge of the metal member 3 and / or the elastic arm portions 31 of the metal member 3 are borne on the side frame portion 401 (specifically, the upper surface of the main body portion 4011).

[0041] Please refer to Figures 1 to 4 As shown, in the present application, the metal member 3 is bent at a position of the clearance space 20 close to the insertion port 101 to form a support plate 32. At least a part of the structure of the support plate 32 extends in the left and right directions and the up and down directions. The support plate 32 supports the side plate 21 in the left and right directions. A plurality of through holes 320 are formed through the support plate 32 in the front and back directions. The through holes 320 are used for air circulation and facilitate heat dissipation. The metal member 3 is bent at a position of the clearance space 20 close to the insertion port 101 to form an elastic arm 33 extending in the direction of inserting into the docking connector. The elastic arm 33 is elastically abutted against the corresponding side plate 21 in a simply supported state.

[0042] The partition space 20 extends continuously from one end of the metal cover 2 to the other end in the front-to-back direction (specifically, from one end of the connector module to the other end in this embodiment), that is, the partition space 20 penetrates the connector module in the front-to-back direction, and the partition space 20 forms an air duct, so that the connector module has a better heat dissipation effect. There is at least one metal piece 3 in the same partition space 20, and the total length of all metal pieces 3 in the same partition space 20 in the front-to-back direction is not less than half of the length of the partition space 20 in the plugging and unplugging direction of the docking connector.

[0043] Please combine Figure 3 , Figure 4 and Figure 10 As shown, in the present application, the metal part 3 extends downward (toward the circuit board 200) at a position close to the insertion port 101 to form a buckle plate 35 (specifically, the buckle plate 35 is formed by further extending downward from the lower side edge of the support plate 32), and the metal frame 4 forms a buckle portion 42 corresponding to the position of the buckle plate, and the buckle plate 35 and the buckle portion 42 are buckled together to achieve mutual limitation in the up and down directions and / or left and right directions.

[0044] Please combine Figures 6 to 10 As shown, in the present application, the electrical connector assembly also includes a socket metal part 9, which is arranged in front of the bottom plate component 403 along the unplugging direction of the docking connector, and the two sides of the socket metal part 9 are spliced ​​or snap-fixed with the two side panels 21 of the metal cover 2, and the socket metal part 9 and the metal cover 2 are basically flush with the end edge of the insertion port 101. The socket metal part 9, the top plate 22 and the side plate 21 are fixed with a socket spring piece 24 at the end edge of the insertion port 101, and the socket spring piece 24 is formed with an inner spring piece 241 extending into the plug-in space 10 and an outer spring piece 242 extending toward the outside of the plug-in space 10.

[0045] Please combine Figures 6 to 10 As shown, further, in the present application, the side frame body 401, the rear frame body 402 and the bottom plate member 403 of the metal frame 4 under the same metal cover shell 2 are surrounded by a frame shape and a clearance opening 300 is formed in the middle, and the terminal module 1 is arranged at the position of the clearance opening 300, and the docking portion of the signal terminal 12 extends downward and protrudes out of the insulating body 11 through the clearance opening 300 for docking with the circuit board 200 to realize signal transmission.

[0046] Furthermore, in the present application, several signal terminals 12 of the same terminal module 1 are arranged in two rows in the up and down directions, at least one row of the signal terminals includes at least one pair of high-speed terminals for transmitting high-speed differential signals, and the electrical connector assembly is actually one of an SFP socket connector, a QSFP socket connector, a QSFP-DD socket connector, or a CXP socket connector.

[0047] Please refer to Figure 8 , Figure 9 and Figure 10 As shown, in the present application, the side plate 21 is formed with a ventilation hole 215 penetrating in the left - right direction. The metal housing 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 plug - in spaces 10 (the rear end plate 23 is actually formed by bending the rear edge of the top plate 22 downward). The rear frame portion 402 of the metal frame 4 is located behind the terminal module 1, and the rear end plate 23 is located behind the rear frame portion 402; so that a gap 102 is formed above the rear frame portion 402 between the rear end plate 23 and the terminal module 1. The rear end plate 23 is formed with a ventilation hole (not shown) penetrating along the plug - in direction of the docking connector.

[0048] In the present 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 housing 2. The top heat dissipation module 5 is formed with a mating hole 51 communicating with the spaced - apart space 20 at a position corresponding to the spaced - apart space 20 along the thickness direction of the circuit board 200.

[0049] Please combine with Figures 1 to 6 As shown, 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 plug - in spaces 10. The two ends of the heat sink bracket 6 along the arrangement direction of the two plug - in spaces 10 are formed with buckle arms 61 extending towards the circuit board 200. The buckle arms 61 are correspondingly buckled on the outer sides of the two side plates 21 at the two ends of the metal housing 2 along the arrangement direction of the two plug - in spaces 10. A buckle 36 is extended at a position on the side of the metal part 3 away from the circuit board 200, and the buckle 36 is correspondingly fixed to the heat sink bracket 6 by buckling.

[0050] Please combine with Figures 1 to 6 As shown, in the present application, the back heat dissipation module 7 includes a back portion 71 and a thickened portion 72 that are attached to the lower surface of the circuit board 200. 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 at least partially formed with a relief hole 201 in the up - down direction at a position corresponding to the connector module. Specifically, in the front - rear direction, the relief hole 201 is located at the front end position of the circuit board 200 (the position close to the insertion port 101). The relief hole 201 penetrates the thickness direction of the circuit board 200 and is open forward. The electrical connector module and the back heat dissipation module 7 are overlapped with each other through the relief hole 201 to realize heat conduction. More specifically, the electrical connector assembly further includes a spring piece member 8. The spring piece member 8 is fixed on the bottom plate member 403 of the metal frame 4.

[0051] Please combine with Figures 6 to 10As shown, the elastic sheet member 8 includes an inner plate 801 abutting against the upper surface of the bottom plate member 403 (the side surface away from the circuit board 200) and an outer plate 802 abutting against the lower surface of the bottom plate member 403 (the side surface close to the circuit board 200). The inner plate 801 and the outer plate 802 are arranged opposite to each other in the up-down direction and connected as a whole at the front edge position, and the bottom plate member 403 is clamped between the inner plate 801 and the outer plate 802. The inner plate 801 is partially stamped and bent to extend from front to back to form an inner elastic arm 81, and the inner elastic arm 81 protrudes into the plug-in space 10 to contact with the docking connector to achieve heat conduction, and at the same time, to achieve effective plug-in and pull-out force between the docking connector and the electrical connector assembly. The outer plate 802 is partially stamped and bent from front to back to form an outer elastic arm 82, which is used to elastically overlap with the back heat dissipation module 7 to achieve heat conduction. Specifically, the thickened portion 72 at least partially protrudes into the clearance hole 201 and overlaps with the outer elastic arm 82 to achieve heat conduction. In this configuration, the inner elastic arm 81 and / or the outer elastic arm 82 extend toward the insertion direction of the docking connector to form a cantilever or a simple support.

[0052] Please refer to the figure Figure 2 , Figure 5 class Figure 6 As shown, the electrical connector assembly also includes a plurality of fixing pins 202, and the fixing pins 202 pass through the back heat dissipation module 7 and the circuit board 200 to fix the back heat dissipation module 7, the circuit board 200 and the metal frame 4 as a whole. Specifically, the fixing pins 202 are threadedly locked with the side frame body 401 of the metal frame 4. The local position of the metal frame 4 located on the outside of the metal cover 2 is fixed to the circuit board 200 by bolts (unnumbered). In the present application, the metal cover 2 is a metal die-casting, and the local position of the metal cover 2 can be manufactured to have a relatively thick thickness and strong plasticity. The electrical connector assembly can have a strong structural strength at least on one side of the circuit board 200, and at the same time have a better heat dissipation effect, especially the design of the bottom plate member 403, so that the high-heat generating part on the docking connector can effectively conduct and dissipate heat through the bottom plate member 403.

[0053] Since the metal part 3 of the metal material has faster heat conduction, in combination with the design of the present application, the metal part 3 is arranged in the spaced space 20 and contacts the side plates 21 of the metal housing 2 and the side frame parts 401 of the metal frame 4 through multiple parts. At the same time, in cooperation with the through holes 320 on the support plate 32, the ventilation holes 215 on the side plates 22 and the rear end plate 23, and the mating holes 51 on the top heat dissipation module 5, while ensuring a large metal heat dissipation area, air circulation can be achieved, and it has a good heat dissipation effect. In addition, in order to have a better heat dissipation effect, the back heat dissipation module 7 conducts heat with the metal frame 4, and the area where the back heat dissipation module 7 is stacked and attached to the electrical connector assembly in the up and down direction is greater than one-half of the total area of the electrical connector assembly in the extending direction of the circuit board 200. Designing the back heat dissipation module 7 partially to fit the lower surface of the circuit board 200 can maximize the effective heat dissipation area of the back heat dissipation module 7 without increasing the area occupied by the electrical connector assembly on the circuit board, and achieve a better heat dissipation effect.

[0054] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

[0055] The above is only a partial embodiment of the present application, not all embodiments. Any equivalent changes made by those of ordinary skill in the art to the technical solutions of the present application by reading the specification of the present application are covered by the claims of the present application.

Claims

1. An electrical connector assembly, comprising a circuit board and an electrical connector module fixed on one surface of the circuit board. The electrical connector module forms an insertion and extraction space along the insertion and extraction direction of a docking connector and forms an insertion port for the docking connector to insert. It is characterized in that: It further comprises a back surface heat dissipation module. The back surface heat dissipation module includes a back surface portion that abuts against the other surface of the circuit board. At least a partial position between the electrical connector module and the back surface heat dissipation module realizes heat conduction. The electrical connector module includes a plurality of terminal modules and a plurality of metal housing cases. The metal housing cases are correspondingly sleeved on the outer periphery of the terminal modules. Each of the metal housing cases includes two side plates and a top plate that are oppositely arranged. A metal frame, comprising a plurality of side frame portions and a rear frame portion that integrally connects the rear edges of the plurality of side frame portions. Two side plates of each metal housing case are correspondingly inserted and fixed on two adjacent side frame portions. A gap is formed between two of the metal housing cases. Both ends of the gap along the insertion and extraction direction of the docking connector communicate with the outside to form an air channel. A top surface heat dissipation module is fixed above the plurality of metal housing cases. A metal piece is fixedly arranged in the gap. The lower end of the metal piece is correspondingly fixed to the side frame portion. A heat sink bracket is further provided. Both ends of the heat sink bracket along the arrangement direction of the plurality of metal housing cases form buckle arms that extend towards the circuit board. The buckle arms are correspondingly buckled on the outer sides of the side plates of the two outermost metal housing cases along the arrangement direction. A buckle is formed at the upper end of the metal piece. The buckle is correspondingly buckled and fixed to the heat sink bracket.

2. The electrical connector assembly according to claim 1, characterized in that: At least partially a relief hole is formed in the circuit board along the thickness direction at a position corresponding to the connector module. Heat conduction is realized by directly or indirectly overlapping each other between the electrical connector module and the back surface heat dissipation module through the relief hole.

3. The electrical connector assembly according to claim 2, characterized in that: The electrical connector assembly includes a spring piece member. The spring piece member is fixed at a position on the electrical connector assembly close to the circuit board side. The spring piece member includes an inner spring arm that protrudes into the insertion and extraction space and an outer spring arm that protrudes in a direction away from the insertion and extraction space. The inner spring arm is used to overlap with the docking connector, and the outer spring arm overlaps with the back surface heat dissipation module to realize heat conduction.

4. The electrical connector assembly according to claim 2, characterized in that: The relief hole is located at a position on the circuit board close to the insertion port. The relief hole penetrates the circuit board along the thickness direction of the circuit board and is open in the direction of the docking connector being pulled out.

5. The electrical connector assembly according to claim 3, characterized in that: The terminal module includes an insulating body and a plurality of signal terminals fixed to the insulating body. A part of the signal terminals protrudes into the insertion and extraction space to correspondingly realize signal transmission with the docking connector. A part of the signal terminals protrudes out of the insulating body to be correspondingly electrically connected to the circuit board. The metal frame includes a bottom plate member. The bottom plate member is located at a position below the corresponding insertion and extraction space. The spring piece member is fixed on the bottom plate member.

6. The electrical connector assembly according to claim 5, characterized in that: The bottom plate component is located near the insertion port of the electrical connector assembly, the bottom plate component is integrally connected to the side frame body, and the elastic sheet component overlaps the bottom plate component and the back heat dissipation module to achieve heat conduction.

7. The electrical connector assembly according to claim 6, wherein: The electrical connector assembly also includes a fixing pin, which passes through the back heat dissipation module and the circuit board to fix the back heat dissipation module, the circuit board and the metal frame as a whole.

8. The electrical connector assembly according to claim 6, wherein: The electrical connector assembly includes at least two electrical connector modules, and the adjacent side panels of the metal cover shells of two adjacent electrical connector modules are fixed integrally through the same side frame body. The metal frame also includes a rear frame body located at an end of the metal cover shell away from the insertion port, and the rear frame body is integrally connected to the side frame body.

9. The electrical connector assembly according to claim 2, wherein: The back heat dissipation module includes a thickened portion protruding into the clearance hole along the thickness direction of the circuit board. The area where the back heat dissipation module and the electrical connector assembly are stacked and fitted together along the thickness direction of the circuit board is greater than half of the total area of ​​the electrical connector assembly along the extension direction of the circuit board.

10. The electrical connector assembly according to claim 5, wherein: Each of the plug-in spaces cooperates with a plurality of the signal terminals, and the plurality of the signal terminals that cooperate with each of the plug-in spaces include at least a pair of high-speed terminals for transmitting high-speed differential signals. The electrical connector assembly is one of an SFP socket connector, a QSFP socket connector, a QSFP-DD socket connector, or a CXP socket connector.

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