CN211128414U

CN211128414U - Holding device and electric connector assembly

Info

Publication number: CN211128414U
Application number: CN201920444523.3U
Authority: CN
Inventors: 袁朝良
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2019-01-25
Filing date: 2019-04-02
Publication date: 2020-07-28
Anticipated expiration: 2029-04-02

Abstract

The utility model discloses a fixing device and an electric connector component, wherein the electric connector component comprises an electric connector which is used for electrically connecting a chip module pressed by a radiator; the clamping piece is provided with a clamping part for clamping the chip module and an installation part for installing the chip module on the radiator; the fixing device is provided with a substrate which is arranged around the periphery of the electric connector, the substrate is provided with a fixing piece, the fixing piece is matched with a locking piece arranged on the radiator to control the radiator to press down the chip module, two convex parts which are higher than the fixing piece are formed by upwards extending the side edge of the substrate, the structures of the two convex parts are different, the two convex parts are limited by the two sides of the radiator to limit the assembling direction of the radiator, so that the radiator can be prevented from being reversely assembled, the two convex parts are formed by extending the two side edges of the substrate, and the two convex parts are integrally formed by punching and forming the substrate.

Description

Holding device and electric connector assembly

[ technical field ] A method for producing a semiconductor device

The present invention relates to a fixing device and an electrical connector assembly, and more particularly to a fixing device and an electrical connector assembly capable of restricting the assembling direction of a heat sink.

[ background of the invention ]

An electrical connector assembly includes an electrical connector for electrically connecting a chip module to a circuit board; the clamping piece is used for clamping the chip module; the metal frame is arranged around the periphery of the electric connector in a surrounding way; the back plate is arranged on the lower surface of the circuit board, two guide posts are assembled at a pair of angular positions of the metal frame, the two guide posts are different in size, during assembly, the chip module is fixed on the clamping sheet firstly, then the clamping sheet with the chip module is fixed on the radiator, and then the radiator is guided and assembled to the metal frame through the guide posts, so that the chip module is located on the electric connector. However, the guide post needs to be separately processed and then assembled to the metal frame, which is complicated in processing procedure, relatively wasteful in material and relatively high in cost.

Therefore, there is a need for a new holding device and an electrical connector assembly to overcome the above problems.

[ Utility model ] content

An object of the present invention is to provide a fixing device and an electrical connector assembly which are easy to process, low in cost and capable of preventing the heat sink from being reversely mounted.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a holding device, comprising: the base plate is provided with a plurality of fixing pieces and used for assembling a radiator, the side edge of the base plate extends upwards to form two convex parts higher than the fixing pieces, the two convex parts are different in structure, and the two convex parts limit the radiator from two sides of the radiator so as to limit the assembling direction of the radiator.

Furthermore, the center of the substrate is provided with a containing cavity, and the two convex parts extend from the two outer side edges of the substrate.

Furthermore, the two convex parts extend from two opposite outer side edges of the substrate, and are arranged in a staggered mode, and the two convex parts are both flat-shaped and have the same height.

Furthermore, a side wall is formed by extending upwards from two opposite outer side edges of the substrate respectively, and the side wall is lower than the convex part and is connected with the convex part.

Further, two outer side edges of the substrate are respectively defined as a first outer side edge and a second outer side edge, the first outer side edge is adjacent to the second outer side edge, the length of the first outer side edge is larger than that of the second outer side edge, a side wall is formed by extending upwards from the first outer side edge, the side wall is lower than the two convex parts, the two convex parts are respectively defined as a first convex part and a second convex part, the first convex part extends upwards from the first outer side edge and is connected with the side wall, and the second convex part extends upwards from the second outer side edge.

Furthermore, two second convex parts are formed by extending upwards from the second outer side edge, each second convex part is provided with a first part connected with the second outer side edge and a second part formed by bending and extending from the first part to the radiator, and the second part is positioned right above the radiator so as to limit the upward displacement of the radiator.

Further, the two convex portions are different in width.

Furthermore, the convex part is provided with an outer side surface exposed out of the radiator, the convex part is also provided with a first limiting surface opposite to the outer side surface and two second limiting surfaces connecting the outer side surface and the first limiting surface, and the first limiting surface and the two second limiting surfaces limit the radiator.

An electrical connector assembly, comprising: an electrical connector for electrically connecting a chip module pressed by the heat sink; the clamping piece is provided with a clamping part for clamping the chip module, and an installation part for installing the chip module on the radiator; the fixing device is provided with a substrate, the substrate is provided with an accommodating cavity for accommodating the electric connector, a plurality of fixing pieces are arranged on the substrate, each fixing piece is matched with a locking piece arranged on the radiator to control the radiator to press the chip module downwards, two convex parts higher than the fixing pieces are formed by upwards extending the side edges of the substrate, the two convex parts are different in structure, and the two convex parts limit the radiator from the two sides of the radiator to limit the assembling direction of the radiator.

Further, the two convex portions are different in width.

Furthermore, the two convex parts extend from two opposite side edges of the substrate, and are arranged in a staggered manner, and the two convex parts are both flat-shaped and have the same height.

Further, the two convex parts extend from two opposite outer edges of the substrate, and the two convex parts and the mounting part are positioned on different sides of the radiator.

Furthermore, the heat radiator is provided with a notch corresponding to each convex part to accommodate the convex part, the notch is provided with a first surface and two opposite second surfaces connected with the first surface, the convex part is provided with an outer side surface exposed out of the heat radiator, the convex part is also provided with a first limiting surface opposite to the outer side surface and two second limiting surfaces connected with the outer side surface and the first limiting surface, and the first limiting surface is matched with the first surface and the second limiting surface is matched with the second surface to limit the heat radiator.

The substrate is provided with a through hole separated from the accommodating hole, a plastic part is provided with a barrel part sleeved on the matching piece, and a convex block enters the through hole and is in hot melting with the through hole.

Furthermore, the heat radiator comprises a heat transfer bottom plate pressed on the chip module and a heat radiating part arranged on the heat transfer bottom plate; a gasket is positioned on the heat transfer bottom plate and sleeved on the locking piece, an elastic piece is sleeved on the locking piece, and two ends of the elastic piece are respectively abutted against the locking piece and the gasket.

The heat dissipation device comprises a heat transfer bottom plate, a heat dissipation part, two positioning pieces, a positioning piece and a back plate, wherein the heat transfer bottom plate is provided with a heat dissipation part, the heat dissipation part is arranged on the heat transfer bottom plate, the two positioning pieces are arranged on two opposite sides of the heat dissipation part, the locking pieces are arranged at four corners of the heat transfer bottom plate, the positioning pieces are arranged between the two locking pieces, the positioning pieces penetrate out of the heat transfer bottom plate downwards and are locked with positioning columns arranged on the back plate to pre-position the heat dissipation device.

Furthermore, the positioning element is provided with a head part and an extension part extending downwards from the head part, the lower surface of the head part abuts against the upper surface of the heat transfer bottom plate, the extension part is locked with the positioning column, and the lower bottom surface of the extension part abuts against the upper surface of the substrate.

Further, two adjacent outer side edges of the substrate are respectively defined as a first outer side edge and a second outer side edge, the length of the first outer side edge is greater than that of the second outer side edge, a side wall is formed by extending upwards from the first outer side edge and is lower than the two convex parts, the two convex parts are respectively defined as a first convex part and a second convex part, the first convex part extends upwards from the first outer side edge and is connected with the side wall, and the second convex part extends upwards from the second outer side edge.

Furthermore, two second convex parts are formed by extending upwards from the second outer side edge, each second convex part is provided with a first part connected with the second outer side edge and a second part formed by bending and extending from the first part to the radiator, the second part is positioned right above the radiator so as to limit the upward displacement of the radiator, and the radiator is provided with a notch for accommodating the first part.

Compared with the prior art, the utility model discloses a fixing device and electric connector subassembly have following beneficial effect:

the two convex parts have different structures, and limit the radiator from two sides of the radiator to limit the assembling direction of the radiator so as to prevent the radiator from being reversely assembled; the two convex parts extend from two side edges of the base plate, so the two convex parts and the base plate are integrally formed by punching and are not required to be separately formed by machining, thereby the machining procedures are less, the structure is simple and the cost is lower.

[ description of the drawings ]

FIG. 1 is a schematic perspective exploded view of a first embodiment of a holding device and an electrical connector assembly of the present invention;

fig. 2 is a schematic perspective view of the first embodiment of the fixing device and the electric connector assembly of the present invention, wherein the fixing device is fixed to the back plate;

FIG. 3 is a schematic perspective view of the clamping sheet of FIG. 2 assembled to the heat sink and turned 90 degrees in the vertical direction;

FIG. 4 is a perspective assembly view of FIG. 1;

FIG. 5 is a perspective view of the holding device and the electric connector assembly according to the first embodiment of the present invention;

FIG. 6 is a top view of FIG. 4;

FIG. 7 is a cross-sectional view A-A of FIG. 6;

fig. 8 is an enlarged schematic view of the mating member, the first plastic member, the second plastic member and the protruding post of the first embodiment of the fixing device and the electrical connector assembly of the present invention;

FIG. 9 is a perspective exploded view of a second embodiment of the fixing device and the electrical connector assembly of the present invention;

fig. 10 is a top view of a second embodiment of the holding device and electrical connector assembly of the present invention;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is a perspective exploded view of a third embodiment of the fixing device and the electrical connector assembly of the present invention;

FIG. 13 is a perspective view of the third embodiment of the fixing device and the electrical connector assembly of the present invention;

fig. 14 is a perspective view of the holding device and the electric connector assembly according to the third embodiment of the present invention.

Detailed description of the embodiments reference is made to the accompanying drawings in which:

[ detailed description ] embodiments

For better understanding of the objects, structures, features, and functions of the present invention, reference should now be made to the drawings and detailed description of the invention.

As shown in fig. 1 to 3, the first embodiment of the electrical connector assembly of the present invention includes an electrical connector 1 electrically connecting a chip module 2 to a circuit board 3; a holding device 6; the electric connector 1 is arranged around the periphery; a clamping sheet 4 for clamping the chip module 2, wherein the clamping sheet 4 is fixed on a heat sink 5, so that the heat sink 5 carries the chip module 2 and is mounted on the electrical connector 1; and a back plate 8 is arranged on the lower surface of the circuit board 3.

As shown in fig. 2 and 3, the electrical connector 1 includes an insulating body 11, a plurality of conductive terminals 12 are received in the insulating body 11, upper portions of the conductive terminals 12 are abutted to the chip module 2, and lower portions of the conductive terminals 12 are electrically connected to the circuit board 3.

As shown in fig. 1 and 6, the holding device 6 is formed by stamping a metal plate, and has a substrate 61, the substrate 61 is substantially rectangular, the substrate 61 has a receiving cavity 611 at the center thereof for receiving the electrical connector 1, a fixing element 7 is respectively assembled at four corners of the substrate 61, the fixing element 7 has a circular hole 71, threads are disposed on an inner surface of the circular hole 71, the substrate 61 has a first side edge 612 at left and right sides of the receiving cavity 611, a second side edge 613 is disposed at front and rear sides of the receiving cavity 611, the length of the first side edge 612 is greater than that of the second side edge 613, each first side edge 612 has a first outer side edge M and a first inner side edge N, the first side edge 613 has a second outer side edge P, the first outer side edge M is adjacent to the second outer side edge P, the length of the first outer side edge M is greater than that of the second outer side edge P, two convex portions 62 (i.e., a first convex portion 614 and a second convex portion 621) extending upward from the first outer side edge M is formed by two convex portions 62 (i.e., a first convex portion) higher than the fixing element 7 (i.e., a second convex portion 621 is disposed opposite to a second convex portion 621, a first convex portion 618 is disposed on the second side edge P, a second side edge r 2, a convex portion 52 is disposed opposite to a first side edge P, a second convex portion 52, a convex portion 52 is disposed opposite to a second side edge P, a second convex portion 52, a convex portion 52 is disposed opposite to a convex portion 52, a convex portion 52 is disposed opposite to a second side edge P, a convex portion 52 is disposed opposite to a convex portion 52, a second side edge P, a convex portion 52, a convex portion corresponding to a convex portion 52 is disposed opposite to a convex portion 52, a convex portion corresponding to a convex portion 52 is disposed opposite to a convex portion, a convex portion corresponding to a convex portion, a convex.

As shown in fig. 1, 5 and 7, the back plate 8 is formed by stamping a metal plate, is substantially rectangular, and is located below the holding device 6, a plurality of protruding columns 81 are assembled on the back plate 8, threads are disposed on outer surfaces of the protruding columns 81, and the protruding columns 81 penetrate through the circuit board 3, and further penetrate through the first receiving holes 614 and the second receiving holes 615 respectively and protrude from the upper surface of the substrate 61.

As shown in fig. 3, 6 and 8, the electrical connector assembly further includes six mating members 9, the mating members 9 are respectively and correspondingly disposed above the first receiving hole 614 and the second receiving hole 615, and correspondingly screw-coupled with the protruding column 81, so as to fix the fixing device 6 and the back plate 8 together, a first plastic member 91 is respectively sleeved outside the mating member 9 located on the first side 612, a second plastic member 92 is respectively sleeved outside the mating member 9 located on the second side 613, the first plastic member 91 has a first cylinder portion 911, two opposite sides of the first cylinder portion 911 are respectively provided with a first arm 912, the two first arms 912 are located on the same straight line and are parallel to the length direction of the first side 612, the first arm 912 protrudes downwards to form a first protruding block 913, the first protruding block 913 is cylindrical, and the surface of the first protruding block 913 is provided with a plurality of protruding ribs 914, first section of thick bamboo 911 cover is located fitting piece 9, first lug 913 corresponds and inserts first through-hole 617, the hot melt first lug 913 can make first lug 913 is fixed in first through-hole 617, in order to prevent fitting piece 9 shift position when rotatory locking, second plastic part 92 has a second section of thick bamboo 921, second section of thick bamboo 921 one side is equipped with a second arm 922, a second lug 923 is stretched to the downwardly protruding of second arm 922, second lug 923 is non-cylindric, second section of thick bamboo 921 cover is located fitting piece 9, second lug 923 corresponds and inserts second through-hole 618, the hot melt second lug 923 can make second lug 923 is fixed in second through-hole 618, in order to prevent fitting piece 9 shift position when rotatory locking.

As shown in fig. 2, 6 and 7, the heat sink 5 includes a heat transfer base plate 51 pressed on the chip module 2 and a heat dissipation portion 52 fixed on the heat transfer base plate 51, the heat transfer base plate 51 is provided with a notch 511 corresponding to each of the protrusions 62 to accommodate the protrusion 62, the notch 511 has a first surface 5111 and two opposite second surfaces 5112 connected to the first surface 5111, the first limiting surface 622 is matched with the first surface 5111, and the second limiting surface 623 is matched with the second surfaces 5112 to limit the heat sink 5. A locking member 53 is respectively installed at four corners of the heat transfer base plate 51, the locking member 53 has an operating portion 531, an intermediate portion 532 extending downward from the operating portion 531, a tail portion 533 extending downward from the intermediate portion 532 and penetrating through the heat transfer base plate 51, threads are provided on a surface of the tail portion 533, a gasket 55 is provided on the heat transfer base plate 51 and sleeved on the intermediate portion 532, an elastic member 54 is sleeved on the intermediate portion 532 and positioned between the operating portion 531 and the gasket 55, two ends of the elastic member 54 respectively abut against the operating portion 531 and the gasket 55, when in operation, the operating portion 531 is rotated by a tool (not shown) to move the locking member 53 downward, the tail portion 533 is in threaded engagement with the circular hole 71 to assemble the heat sink 5 to the holding device 6, and at the same time, the operating portion 531 presses the elastic member 54 downward, the elastic member 54 presses down the gasket 55, the gasket 55 presses down the heat transfer bottom plate 51, and the heat transfer bottom plate 51 presses down the chip module 2, so that the chip module 2 is abutted to the conductive terminals 12, thereby achieving good electrical connection between the chip module 2 and the electrical connector 1.

As shown in fig. 2 to 4, the clamping sheet 4 has a main body portion 41, from the upper surface of the main body portion 41 protrudes upwards to form four mounting portions 42, so as to assemble the clamping sheet 4 in the heat sink 5, the mounting portions 42 are disposed on two opposite sides of the heat sink 5, and are located on different sides from the two protruding portions 62, the mounting portions 42 have a base portion 421 received in the corresponding grooves 512 of the heat transfer bottom plate 51, from the base portion 421 protrudes upwards to form a hook portion 422, the hook portion 422 is buckled downwards to the heat transfer bottom plate 51, from the lower surface of the main body portion 41 protrudes downwards to form four clamping portions 43, so as to clamp the chip module 2, and the clamping portions 43 are disposed around the chip module 2.

During assembly, the first plastic part 91 and the second plastic part 92 are respectively sleeved on the mating part 9, the first plastic part 91 and the second plastic part 92 are thermally fused to be fixed on the substrate 61, the holding device 6 and the back plate 8 are fixed together by locking the mating part 9 and the protruding column 81, the clamping piece 4 with the chip module 2 is assembled on the heat sink 5, the assembling direction of the heat sink 5 and the locking part 53 are guided by the convex part 62 to be locked with the fixing part 7, so that the heat sink 5 is mounted on the holding device 6, during the process of mounting the heat sink 5, the two convex parts 62 can limit the heat sink 5 from two sides of the heat sink 5 to limit the assembling direction of the heat sink 5, so as to prevent the heat sink 5 from being reversely mounted, and further prevent the chip module 2 from being reversely mounted on the electrical connector 1, so as to ensure the normal electrical connection between the chip module 2 and the electrical connector 1.

As shown in fig. 9 to 11, a second embodiment of the electrical connector assembly of the present invention is different from the first embodiment in that the first plastic member 91 is not provided, so that the first through hole 617 is not provided on two opposite sides of the first receiving hole 614, the mating member 9 is not received in the first receiving hole 614, two positioning members 56 are provided on the heat transfer bottom plate 51 and located on two opposite sides of the heat dissipating portion 52, the positioning member 56 is located between the two locking members 53, the positioning member 56 has a head portion 561 and an extending portion 562 extending downward from the head portion 561, the extending portion 562 penetrates downward from the top of the heat transfer bottom plate 51 to be screwed with a positioning post 82 provided on the back plate 8, so as to pre-position the heat sink 5, when assembling the heat sink 5, the positioning member 56 is locked with the positioning post 82, at this time, the lower surface of the head portion 561 abuts against the upper surface of the heat transfer base plate 51, the lower bottom surface of the extension portion 562 abuts against the upper surface of the substrate 61, at this time, the chip module 2 just starts to contact with the conductive terminals 12, and then the locking member 53 is locked to the fixing member 7, so that the chip module 2 presses the conductive terminals 12 downward, at this time, the conductive terminals 12 elastically deform downward, and then the chip module 2 moves downward to a final position, that is, the chip module 2 moves downward to abut against the insulating body 11. Because the distance between the two positioning members 56 is set to be smaller along the width direction of the heat sink 5, and when the positioning members 56 and the positioning columns 82 are locked, the chip module 2 just starts to contact the conductive terminals 12, the conductive terminals 12 do not generate larger elasticity for the chip module 2, and the heat sink 5 is not greatly warped, and then when the four locking members 53 are locked, because the upper surface of the heat transfer bottom plate 51 abuts against the lower surface of the head 561, the heat sink 5 is pre-positioned, the heat sink 5 is limited from moving upwards, the heat sink 5 is prevented from tilting, and the conductive terminals 12 and the chip module 2 are crushed. The rest of the structure and function are completely the same as those of the first embodiment, and are not described herein.

As shown in fig. 12 to 14, a third embodiment of the electrical connector assembly of the present invention is different from the first embodiment in that the protrusion 62 includes a first protrusion 62a and a second protrusion 62b, the first protrusion 62a extends upward from the first outer edge M and is connected to the sidewall 63, which is the same as one of the second protrusions 62 in the first embodiment, the second protrusion 62b extends upward from the second outer edge P (in other embodiments, only one of the second protrusions 62b may be provided at the middle position of the second outer edge P), each of the second protrusions 62b has a first portion 624 connected to the second outer edge P and a second portion 625 formed by bending and extending from the first portion 624 toward the heat sink 5, in this embodiment, the second portion 625 extends from the top surface of the first portion 624 toward the heat sink 5 (in other embodiments, the second portion 625 may be in other curved shapes), the second portion 625 has a third limiting surface 6251, the heat transfer base plate 51 is provided with two notches 511 corresponding to the second protrusions 62b, respectively, the first portion 624 is inserted into the notches 511, the second portion 625 is located right above the heat transfer base plate 51, when the heat sink 5 is assembled, the heat sink 5 is firstly inclined by a certain angle along the length direction thereof, so that the second protrusion 62b enters the notches 511, at this time, the first limiting surface 622 of the first portion 624 and the first surface 5111 cooperate to initially position the heat sink 5 for length direction displacement, the second limiting surface 623 of the first portion 624 and the second surface 5112 cooperate to initially position the heat sink 5 for width direction displacement, and the first protrusion 62a can assist in guiding and positioning the heat sink 5 from the side edge of the heat sink 5, the heat sink 5 is gradually laid flat, and then the two locking members 53 on the opposite side of the second convex portion 62b are locked, so that the end of the heat sink 5 provided with the second convex portion 62b tends to tilt up, at this time, the upper surface of the heat transfer base plate 51 abuts against the third limiting surface 6251 of the second portion 625, the second portion 625 limits the upward tilting distance of the heat sink 5, and can prevent the heat sink 5 from tilting during assembly to cause poor contact between the electrical connector 1 and the chip module 2, and finally the two locking members 53 on the end of the second convex portion 62b are locked to install the heat sink 5 to the holding device 6. The rest of the structure and function are completely the same as those of the first embodiment, and are not described herein.

To sum up, the utility model discloses electric connector subassembly has following beneficial effect:

(1) the two convex portions 62 are formed by extending upwards from the side edges of the base plate 61 respectively, so that the convex portions 62 and the base plate 61 are integrally formed by punching a metal plate, the structure is simple, the number of processing procedures is small, and the cost is low.

(2) The two convex portions 62 are arranged in a staggered manner with respect to the substrate 61, and the two convex portions 62 have different structures, so that the convex portions 62 limit the heat sink 5 from both sides of the heat sink 5, the assembling direction of the heat sink 5 can be limited, and the heat sink 5 is prevented from being reversely assembled.

(3) First plastic part 91 with second plastic part 92 is located corresponding to the cover respectively the fitting piece 9, first lug 913 with second lug 923 hot melt is in order to be fixed in on the fixing device 6, need fixing device 6 is beaten the counter sink and is restricted the position of fitting piece 9 makes fixing device 6 simple structure, easier stamping forming.

(4) The locking members 53 are disposed at four corners of the heat transfer base plate 51, each positioning member 56 is disposed between two locking members 53, the positioning member 56 penetrates through the heat sink 5 downward and is locked with the positioning posts 82 disposed on the back plate 8, the positioning member 56 has a head portion 561 and an extending portion 562 extending downward from the head portion 561, a lower surface of the head portion 561 abuts against an upper surface of the heat transfer base plate 51, and a lower bottom surface of the extending portion 562 abuts against an upper surface of the substrate 61 to pre-position the heat sink 5, so as to prevent the heat sink 5 from being warped due to uneven stress when being mounted to the holding device 6.

(5) The second protrusion 62b has the first portion 624 connected to the second outer side edge P and the second portion 625 formed by bending and extending from the first portion 624 toward the heat sink 5, the first position-limiting surface 622 of the first portion 624 cooperates with the first surface 5111 to primarily position the heat sink 5 for longitudinal displacement, the second position-limiting surface 623 of the first portion 624 cooperates with the second surface 5112 to primarily position the heat sink 5 for width displacement, and the second portion 625 is located directly above the heat sink 5 to limit the upward displacement of the heat sink 5, so as to prevent the heat sink 5 from tilting during assembly to cause poor contact between the electrical connector 1 and the chip module 2.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all the equivalent technical changes using the description and drawings of the present invention are included in the scope of the present invention.

Claims

1. A holding device, comprising:

the base plate is provided with a plurality of fixing pieces and used for assembling a radiator, the side edge of the base plate extends upwards to form two convex parts higher than the fixing pieces, the two convex parts are different in structure, and the two convex parts limit the radiator from two sides of the radiator so as to limit the assembling direction of the radiator.

2. The holding device of claim 1, wherein: the center of the substrate is provided with a containing cavity, and the two convex parts extend from the two outer side edges of the substrate.

3. The holding device of claim 2, wherein: the two convex parts extend from two opposite outer side edges of the substrate, are arranged in a staggered mode, and are both flat-shaped and have the same height.

4. The holding device of claim 3, wherein: and the two opposite outer side edges of the substrate respectively extend upwards to form a side wall, and the side wall is lower than the convex part and is connected with the convex part.

5. The holding device of claim 2, wherein: the two outer side edges of the substrate are respectively defined as a first outer side edge and a second outer side edge, the first outer side edge is adjacent to the second outer side edge, the length of the first outer side edge is larger than that of the second outer side edge, a side wall is formed by upward extending from the first outer side edge and is lower than the second convex portion, the second convex portion is respectively defined as a first convex portion and a second convex portion, the first convex portion is formed by upward extending from the first outer side edge and is connected to the side wall, and the second convex portion is formed by upward extending from the second outer side edge.

6. The holding device of claim 5, wherein: two second convex parts are formed by extending upwards from the second outer side edge, each second convex part is provided with a first part connected with the second outer side edge and a second part formed by bending and extending from the first part to the radiator, and the second part is positioned right above the radiator so as to limit the upward displacement of the radiator.

7. The holding device of claim 1, wherein: the two convex parts have different widths.

8. The holding device of claim 1, wherein: the convex part is provided with an outer side surface exposed out of the radiator, the convex part is also provided with a first limiting surface opposite to the outer side surface and two second limiting surfaces connecting the outer side surface and the first limiting surface, and the first limiting surface and the two second limiting surfaces limit the radiator.

9. An electrical connector assembly, comprising:

an electrical connector for electrically connecting a chip module pressed by the heat sink;

the clamping piece is provided with a clamping part for clamping the chip module, and an installation part for installing the chip module on the radiator;

the fixing device is provided with a substrate, the substrate is provided with an accommodating cavity for accommodating the electric connector, a plurality of fixing pieces are arranged on the substrate, each fixing piece is matched with a locking piece arranged on the radiator to control the radiator to press the chip module downwards, two convex parts higher than the fixing pieces are formed by upwards extending the side edges of the substrate, the two convex parts are different in structure, and the two convex parts limit the radiator from the two sides of the radiator to limit the assembling direction of the radiator.

10. The electrical connector assembly of claim 9, wherein: the two convex parts have different widths.

11. The electrical connector assembly of claim 9, wherein: the two convex parts extend from two opposite side edges of the substrate, are arranged in a staggered mode, and are both flat-shaped and have the same height.

12. The electrical connector assembly of claim 11, wherein: the two convex parts extend from two opposite outer side edges of the substrate, and the two convex parts and the mounting part are positioned on different sides of the radiator.

13. The electrical connector assembly of claim 12, wherein: and the two opposite outer side edges of the substrate respectively extend upwards to form a side wall, and the side wall is lower than the convex part and is connected with the convex part.

14. The electrical connector assembly of claim 9, wherein: the radiator is provided with a notch corresponding to each convex part to accommodate the convex part, the notch is provided with a first surface and two opposite second surfaces connected with the first surface, the convex part is provided with an outer side surface exposed out of the radiator, the convex part is also provided with a first limiting surface opposite to the outer side surface and two second limiting surfaces connected with the outer side surface and the first limiting surface, and the first limiting surface is matched with the first surface and the second limiting surface is matched with the second surface to limit the radiator.

15. The electrical connector assembly of claim 9, wherein: the device further comprises a back plate positioned below the fixing device, the back plate is assembled with a plurality of convex columns penetrating through the substrate, the substrate is provided with an accommodating hole for accommodating the convex columns, a fitting piece is positioned above the accommodating hole and locked with the convex columns, the substrate is provided with a through hole separated from the accommodating hole, a plastic piece is provided with a barrel part sleeved on the fitting piece, and a convex block enters the through hole and is in hot melting with the through hole.

16. The electrical connector assembly of claim 9, wherein: the radiator comprises a heat transfer bottom plate pressed on the chip module and a heat dissipation part arranged on the heat transfer bottom plate; a gasket is positioned on the heat transfer bottom plate and sleeved on the locking piece, an elastic piece is sleeved on the locking piece, and two ends of the elastic piece are respectively abutted against the locking piece and the gasket.

17. The electrical connector assembly of claim 16, wherein: the heat-dissipating device further comprises two positioning pieces arranged on the heat-transferring bottom plate and positioned on two opposite sides of the heat-dissipating part, the locking pieces are arranged at four corners of the heat-transferring bottom plate, the positioning pieces are positioned between the two locking pieces, a back plate is positioned below the holding device, the positioning pieces penetrate out of the heat-transferring bottom plate downwards and are locked with a positioning column arranged on the back plate to pre-position the heat sink, and at the moment, the chip module is not pressed to the final position by the heat sink.

18. The electrical connector assembly of claim 17, wherein: the positioning piece is provided with a head part and an extension part extending downwards from the head part, the lower surface of the head part abuts against the upper surface of the heat transfer bottom plate, the extension part is locked with the positioning column, and the lower bottom surface of the extension part abuts against the upper surface of the base plate.

19. The electrical connector assembly of claim 9, wherein: two adjacent outer side edges of the substrate are respectively defined as a first outer side edge and a second outer side edge, the length of the first outer side edge is greater than that of the second outer side edge, a side wall is formed by upward extending from the first outer side edge and is lower than the two convex parts, the two convex parts are respectively defined as a first convex part and a second convex part, the first convex part is formed by upward extending from the first outer side edge and is connected with the side wall, and the second convex part is formed by upward extending from the second outer side edge.

20. The electrical connector assembly of claim 19, wherein: the second convex part is provided with a first part connected with the second outer side edge and a second part formed by bending and extending the first part towards the radiator, the second part is positioned right above the radiator to limit the upward displacement of the radiator, and the radiator is provided with a notch for accommodating the first part.