CN108336523B

CN108336523B - Electrical connector assembly

Info

Publication number: CN108336523B
Application number: CN201711405865.6A
Authority: CN
Inventors: 朱德祥; 金左锋
Original assignee: Lotes Co Ltd
Current assignee: Lotes Co Ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2020-06-26
Anticipated expiration: 2037-12-22
Also published as: CN108336523A

Abstract

The invention discloses an electric connector assembly, a back plate assembly arranged below a circuit board is provided with a first back plate and a second back plate, the first back plate is arranged on the lower surface of the circuit board and is provided with an abutting part, the abutting part is higher than the top surface of the first back plate so as to abut against the lower surface of the circuit board, the second back plate is arranged below the first back plate so as to enhance the strength of the first back plate, a supporting part integrally protrudes towards the abutting part of the second back plate, the supporting part is used for supporting the abutting part, the strength of the abutting part is enhanced, the first abutting surface is enabled to be tightly attached to the lower surface, the abutting area is increased, the abutting effect of the abutting part on the circuit board is enabled to be.

Description

Electrical connector assembly

Technical Field

The present invention relates to an electrical connector assembly, and more particularly, to an electrical connector assembly for preventing a circuit board from sinking.

Background

An electrical connector assembly includes a circuit board, an electrical connector mounted above the circuit board, a back plate mounted below the circuit board, and an electronic module disposed on the electrical connector. The fixing pieces fix the electric connector on the circuit board and penetrate through the circuit board to be connected with the back plate, so that the back plate is tightly attached to the lower portion of the circuit board.

However, because the plurality of fixing members are located around the plurality of terminals, the acting force applied by the plurality of fixing members to the circuit board makes the circuit board generate tilting deformation, so that the area of the circuit board corresponding to the terminals sinks relative to other areas of the circuit board, thereby making the terminals and the circuit board have poor contact, further making the impedance of the electrical connector increase, and being not beneficial to the electrical connection reliability of the electrical connector.

The common technical scheme is that a butting part is arranged on the back plate relative to the area of the circuit board corresponding to the terminal and used for butting the lower part of the circuit board, so that the technical problem that the area of the circuit board corresponding to the terminal sinks is solved. Because the electric connector assembly also comprises the electronic module, the weight of the electric connector assembly forms a large load on the circuit board, and the single backboard is thin and easy to press to generate elastic deformation, so that the abutting part on the backboard is weak in strength, the supporting effect of the abutting part on the circuit board is poor, and the problem of poor contact between the terminal and the circuit board caused by the sinking of the circuit board still can not be solved.

Therefore, there is a need for a new electrical connector assembly that overcomes the above problems.

Disclosure of Invention

The invention aims to provide an electric connector assembly which is provided with a supporting part below an abutting part of a back plate and is used for supporting the abutting part, so that the strength of the abutting part is increased.

In order to achieve the purpose, the invention adopts the following technical scheme: an electrical connector assembly for mounting to a circuit board, the circuit board having an upper surface and a lower surface, comprising: an electronic module; the electric connector is arranged on the upper surface and used for electrically connecting the electronic module to the circuit board; a backplate assembly disposed on the lower surface, comprising: the first back plate is installed on the lower surface, an abutting portion is convexly arranged towards the circuit board, the abutting portion and the electric connector are correspondingly arranged up and down, the abutting portion is higher than the top surface of the first back plate, the abutting portion abuts against the lower surface, the second back plate is installed below the first back plate, a supporting portion protrudes towards the abutting portion integrally, and the supporting portion is used for supporting the abutting portion.

Further, from a recess is established to first backplate top surface concave, a plurality of walls and a bridge portion have on the first backplate, it is a plurality of the wall meets in proper order and encloses and establishes to form the recess, the bridge portion connects two of relative setting the wall, butt joint portion certainly bridge portion upwards protruding establishing forms.

Further, the first back plate determines a length direction and a width direction, the first back plate is provided with four wall surfaces which are sequentially connected, two of the wall surfaces are arranged in parallel in the length direction, the other two wall surfaces are arranged in parallel in the width direction, the bridging part is connected to the two wall surfaces which are parallel in the length direction, and the two wall surfaces which are parallel in the width direction are respectively the same as the distance between the bridging part.

Further, the bridging portion has the abutting portion and connecting portions located on both sides of the abutting portion, the connecting portions are used for connecting the abutting portion and the wall surface, and the length of the bridging portion is greater than that of the connecting portions.

Further, the connecting part is provided with a positioning hole for fixing the connecting part on the second back plate.

Further, the electrical connector has a plurality of terminals, the circuit board has a mounting area, the terminals are arranged on the circuit board in a matrix to form the mounting area, and a projection of the mounting area in the vertical direction covers a projection of the groove, the abutting portion, and the supporting portion in the vertical direction.

Further, the first back plate is provided with a first appearance contour line, the second back plate is provided with a second appearance contour line, and projections of the first appearance contour line and the second appearance contour line in the up-down direction are overlapped.

Further, the first back plate and the second back plate are both made of metal materials.

Further, the thickness of the second back plate is larger than that of the first back plate.

Further, the abutting part is provided with a first abutting surface and a second abutting surface which are oppositely arranged up and down, the first abutting surface is higher than the first back plate top surface and the second back plate top surface, the first abutting surface abuts against the lower surface, and the second abutting surface is located above the supporting part and abuts against the supporting part.

Furthermore, an accommodating groove is concavely arranged on the bottom surface of the first back plate, the accommodating groove and the abutting part are arranged oppositely up and down, and the supporting part protrudes into the accommodating groove.

Further, the housing groove is formed by the abutting portion being arched toward the circuit board.

Further, the first back plate defines a length direction and a width direction, the dimension of the first back plate in the length direction is larger than the dimension of the first back plate in the width direction, and the length of the abutting portion is larger than the width of the abutting portion.

Further, the abutting portion passes through and extends along a center line of the first back plate in the length direction.

Further, the electronic module is arranged above the electric connector from top to bottom, and the projection of the electronic module in the up-down direction covers the projection of the abutting part and the support part in the up-down direction.

Compared with the prior art, the back plate assembly arranged below the circuit board is provided with a first back plate and a second back plate, the first back plate is arranged on the lower surface of the circuit board and is provided with an abutting part, the abutting part is higher than the top surface of the first back plate so as to abut against the lower surface of the circuit board, the second back plate is arranged below the first back plate so as to enhance the strength of the first back plate, a supporting part protrudes towards the abutting part of the second back plate, the supporting part is used for supporting the abutting part, the strength of the abutting part is increased, the lower surface is tightly attached to the first abutting surface, the abutting area is increased, the abutting effect of the abutting part on the circuit board is good in effect, the.

[ description of the drawings ]

FIG. 1 is a perspective half-sectional view of the electrical connector assembly of the present invention assembled to a circuit board;

fig. 2 is an exploded perspective view of the electrical connector assembly and circuit board of fig. 1;

FIG. 3 is an exploded perspective view of the backplane assembly of FIG. 2 and a circuit board from another perspective;

fig. 4 is a plan view from bottom to top of the electrical connector assembly of fig. 1 mounted to a circuit board;

FIG. 5 is a plan sectional view taken along A-A of FIG. 4;

FIG. 6 is a perspective half cut-away view of the backplate assembly of FIG. 1.

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

electrical connector assembly	100
						Electrical connector	1	Insulating body	10	Butt joint groove	11
Metal cover	12
						Back plate assembly	2	First backboard	21	A first top surface	210
First bottom surface	211	Second fixing hole	212	Groove	213
						Wall surface	2130	Bridge section	214	Abutting part	215
First abutting surface	2151	Second abutting surface	2152	Connecting part	216
						Locating hole	2160	Accommodating groove	217
Second backboard	22	Second top surface	220	Second bottom surface	221
						Third fixing hole	222	Supporting part	223	Rivet	23
Electronic module	3	Heat dissipation element	4	Fixing piece	5
						Circuit board	200	Upper surface of	201	Lower surface	202
First fixing hole	203	Mounting area	204
						Length direction of the film	X	Width direction of the sheet	Y

[ detailed description ] embodiments

For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.

Referring to fig. 1, fig. 2 and fig. 3, which are electrical connector assemblies 100 according to embodiments of the present invention, the electrical connector assemblies 100 are mounted on a circuit board 200, the electrical connector assemblies 100 include an electrical connector 1 mounted on the circuit board 200, the electrical connector 1 has a plurality of terminals (not shown) for electrically connecting an electronic module 3, in the present embodiment, the electronic module 3 is a CPU module; a heat dissipation element 4 disposed above the electronic module 3; a backplate assembly 2 mounted under the circuit board 200; a plurality of fixing members 5 penetrate through the circuit board 200 to fix the electrical connector 1 and the backplane assembly 2 above and below the circuit board 200.

Referring to fig. 1, fig. 2 and fig. 3, the circuit board 200 has an upper surface 201 and a lower surface 202 disposed opposite to each other. The circuit board 200 has a plurality of first fixing holes 203, and the plurality of first fixing holes 203 correspondingly receive a plurality of fixing members 5 for fixing the electrical connector 1 and the backplane assembly 2 to the upper surface 201 and the lower surface 202, respectively. The circuit board 200 has a mounting region 204 corresponding to the plurality of terminals in the vertical direction, and the plurality of first fixing holes 203 are located around the mounting region 204. The lower surface 202 is provided with a plurality of electrical components (not shown), which are correspondingly disposed in the mounting region 204.

Referring to fig. 1, fig. 2 and fig. 3, the electrical connector 1 has an insulating body 10, and the insulating body 10 is mounted on the upper surface 201. A mating slot 11 is recessed from the insulating housing 10 for receiving the electronic module 3, the plurality of terminals (not shown) are disposed in the insulating housing 10, one end of the plurality of terminals (not shown) protrudes into the mating slot 11 for electrically contacting the electronic module 3, and the other end of the plurality of terminals (not shown) electrically contacts the mounting region 204, thereby electrically connecting the electronic module 3 and the circuit board 200. A plurality of the terminals are arranged in a matrix on the mounting region 204. The electrical connector 1 has a metal cover 12, and the metal cover 12 is disposed above the receiving groove 217 for covering the electronic module 3, so that the electronic module 3 is in good electrical contact with the plurality of terminals.

Referring to fig. 2, 3 and 6, the backplane assembly 2 is mounted on the lower surface 202, and is disposed opposite to the mounting region 204 for supporting the circuit board 200. The back plate assembly 2 is provided with a first back plate 21 mounted on the lower surface 202 and a second back plate 22 mounted below the first back plate 21, wherein the shape contour line of the first back plate 21 coincides with the projection of the shape contour line of the second back plate 22 in the vertical direction, and the shape contour line of the first back plate 21 and the shape contour line of the second back plate 22 are rounded off, so that the installer can be prevented from being scratched in the installation process. The first back plate 21 and the second back plate 22 are made of a metal material, so that the strength of the first back plate 21 and the second back plate 22 is greater than that of the circuit board 200, which is beneficial to the supporting effect of the first back plate 21 and the second back plate 22 on the circuit board 200, thereby enhancing the strength of the circuit board 200 and effectively preventing the circuit board 200 from sinking. Thereby increasing the strength of the circuit board 200. The thickness of the second back plate 22 is greater than that of the first back plate 21, so that the strength of the back plate assembly 2 is increased, the supporting effect of the back plate assembly 2 on the circuit board 200 is facilitated, and the circuit board 200 is effectively prevented from sinking.

Referring to fig. 2, fig. 3 and fig. 6, the first back plate 21 has a first top surface 210 and a first bottom surface 211 disposed opposite to each other. The second fixing holes 212 penetrate from the first top surface 210 to the first bottom surface 211, the second fixing holes 212 are respectively arranged in one-to-one correspondence with the first fixing holes 203, and the second fixing holes 212 are used for the fixing members 5 to penetrate through.

The second back plate 22 has a second top surface 220 and a second bottom surface 221, which are disposed opposite to each other, and a plurality of third fixing holes 222 are recessed from the second top surface 220 to penetrate through the second bottom surface 221. The third fixing holes 222 and the second fixing holes 212 are disposed opposite to each other one by one, and in this embodiment, the diameters of the second fixing holes 212 and the third fixing holes 222 are the same. The third fixing hole 222 is used for the fixing member 5 to pass through.

Referring to fig. 6, before the electrical connector assembly 100 is mounted on the circuit board 200, the second back plate 22 is fixed to the first back plate 21, the second fixing holes 212 are vertically corresponding to the third fixing holes 222, and then a plurality of rivets 23 are respectively inserted through the first back plate 21 and the second back plate 22, and the plurality of rivets 23 are respectively fixed to the first back plate 21 and the second back plate 22 in an interference manner, so that the second top surface 220 is tightly fixed to the first bottom surface 211, thereby forming the back plate assembly 2. Of course, in other embodiments, the second back plate 22 can be fixed under the first back plate 21 by using glue or solder.

Referring to fig. 2, fig. 3 and fig. 4, the first back plate 21 defines a length direction X and a width direction Y perpendicular to the up-down direction. The dimension of the mounting region 204 in the length direction X is greater than the dimension of the mounting region 204 along the width direction Y, and the first back plate 21 corresponds to the mounting region 204, so the dimension of the first back plate 21 in the length direction X is greater than the dimension of the first back plate 21 in the width direction Y. From first top surface 210 is recessed to being established to running through a recess 213 of first bottom surface 211, recess 213 is followed length direction X's size is greater than recess 213 follows width direction Y's size, recess 213 is used for letting down a plurality of electrical component. The first back plate 21 is formed with a plurality of walls 2130, and the plurality of walls 2130 are sequentially connected to form the groove 213. In this embodiment, the four wall surfaces 2130 are sequentially connected to form the groove 213, two of the wall surfaces 2130 are arranged in parallel in the longitudinal direction X, and the other two wall surfaces 2130 are arranged in parallel in the width direction Y.

Referring to fig. 2, 3 and 5, the first back plate 21 has a bridging portion 214, the bridging portion 214 connects the two wall surfaces 2130 arranged in the length direction X, and the bridging portion 214 passes through and extends along a center line of the first back plate 21 in the length direction X, so that the distance between the bridging portion 214 and the two wall surfaces 2130 arranged in parallel in the width direction Y is the same, and the groove 213 is divided into two parts with equal areas by the bridging portion 214, which is beneficial to the strength of the first back plate 21. An abutting portion 215 and a receiving groove 217 located below the abutting portion 215 are arched from the middle of the bridge portion 214 toward the circuit board 200, the abutting portion 215 has a length larger than the width of the abutting portion 215, and the receiving groove 217 has a length larger than the width of the receiving groove 217. The abutting portion 215 has a first abutting surface 2151 and a second abutting surface 2152 which are disposed to face each other in the vertical direction, the first abutting surface 2151 is higher than the first top surface 210 and vertically corresponds to the mounting region 204, the first abutting surface 2151 abuts against the lower surface 202 from the bottom to the top, and the second abutting surface 2152 is disposed toward the housing groove 217. The bridge portion further includes two connecting portions 216, the two connecting portions 216 are located on both sides of the abutting portion 215 in the longitudinal direction X, and the connecting portions 216 are configured to connect the wall surfaces 2130. Each of the connecting portions 216 has a positioning hole 2160, and the rivet 23 is in interference fit with the positioning hole 2160 and fixes the connecting portion 216 to the second backplane 22, so as to position the bridging portion 214, so that the positioning effect of the abutting portion 215 is better, and the abutting effect of the abutting portion 215 on the lower surface 202 is facilitated.

Referring to fig. 2, fig. 3 and fig. 6, a supporting portion 223 extends upward from the second top surface 220, and the supporting portion 223 protrudes into the receiving groove 217 to contact with the second contact surface 2152, so that the supporting portion 223 can support the contact portion 215, the strength of the contact portion 215 is increased, the first contact surface 2151 is made to be closely attached to the lower surface 202, the contact area is increased, the contact effect of the contact portion 215 on the circuit board 200 is good, the circuit board 200 is effectively prevented from sinking, and the contact between the terminals and the mounting region 204 is good. The length of the support portion 223 is greater than the width of the support portion 223, and the length of the support portion 223 is slightly less than the length of the receiving groove 217, so that the support portion 223 can be completely abutted to the second abutting surface 2152 in the length direction X, thereby increasing the abutting area, enhancing the supporting function, preventing the circuit board 200 from sinking, and making the contact between the terminal and the mounting region 204 good. The height of the supporting portion 223 is approximately equal to the depth of the groove 213, so that the second top surface 220 can be tightly attached to the first bottom surface 211, and the supporting effect of the second back plate 22 on the first back plate 21 is increased.

Referring to fig. 2, 3 and 4, the fixing member 5 passes through the third fixing hole 222 from bottom to top, the second fixing hole 212 and the first fixing hole 203 are in interference fit with the first fixing hole 203, the second fixing hole 212 and the third fixing hole 222, so as to fix the backplane assembly 2 to the lower surface 202, and a butt fixing member (not shown) passes through the insulating body 10 and is in fixed fit with the fixing member 5, so as to fix the electrical connector 1 to the upper surface 201.

In summary, the electrical connector assembly of the present invention has the following advantages:

1. the supporting portion 223 protrudes into the receiving groove 217 to contact with the second contact surface 2152, so that the supporting portion 223 can support the contact portion 215, the strength of the contact portion 215 is increased, the first contact surface 2151 is tightly attached to the lower surface 202, the contact area is increased, the contact effect of the contact portion 215 on the circuit board 200 is good, the circuit board 200 is effectively prevented from sinking, and the contact between the terminals and the mounting region 204 is good.

2. The height of the supporting portion 223 is approximately equal to the depth of the groove 213, so that the second top surface 220 can be tightly attached to the first bottom surface 211, and the supporting effect of the second back plate 22 on the first back plate 21 is increased.

3. The first back plate 21 and the second back plate 22 are made of metal materials, so that the strength of the first back plate 21 and the second back plate 22 is greater than that of the circuit board 200, which is beneficial to the effect of the first back plate 21 and the second back plate 22 on supporting the circuit board 200, thereby enhancing the strength of the circuit board 200, effectively preventing the circuit board 200 from sinking, and enabling the terminals to be in good contact with the mounting area 204.

4. The thickness of the second back plate 22 is greater than that of the first back plate 21, so that the strength of the back plate assembly 2 is increased, the supporting effect of the back plate assembly 2 on the circuit board 200 is facilitated, the circuit board 200 is effectively prevented from sinking, and the terminals are in good contact with the mounting areas 204.

5. The supporting portion 223 integrally extends from the second top surface 220, so that the stability of the supporting portion 223 is increased, and the supporting effect of the supporting portion on the abutting portion 215 is enhanced.

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 technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.

Claims

1. An electrical connector assembly for mounting to a circuit board, the circuit board having an upper surface and a lower surface, comprising:

an electronic module;

the electric connector is arranged on the upper surface and used for electrically connecting the electronic module to the circuit board;

a backplate assembly disposed on the lower surface, comprising:

a first back plate made of metal material and mounted on the lower surface, the first back plate defining a length direction and a width direction, the dimension of the first back plate in the length direction being greater than the dimension of the first back plate in the width direction, the first back plate being provided with a butting portion and two positioning holes protruding toward the circuit board, the butting portion being disposed corresponding to the electrical connector in the up-down direction, the butting portion being higher than the top surface of the first back plate, the butting portion butting against the lower surface, the two positioning holes being respectively located at two sides of the butting portion in the length direction, a groove being recessed from the top surface of the first back plate, the first back plate having a plurality of wall surfaces and a bridging portion, the plurality of wall surfaces being sequentially connected to form the groove, the bridging portion connecting the two wall surfaces disposed oppositely, the abutting part is formed by upward protruding from the bridging part,

the second back plate is made of metal materials and is arranged below the first back plate, the thickness of the second back plate is larger than that of the first back plate, a supporting portion protrudes towards the abutting portion integrally, the supporting portion is used for supporting the abutting portion, and the two positioning holes are used for fixing the abutting portion on the second back plate and fixing the abutting portion on two sides of the supporting portion along the length direction.

2. The electrical connector assembly of claim 1, wherein: the first back plate is provided with four wall surfaces which are sequentially connected, wherein two of the wall surfaces are arranged in parallel in the length direction, the other two of the wall surfaces are arranged in parallel in the width direction, the bridging part is connected with the two parallel wall surfaces in the length direction, and the two parallel wall surfaces in the width direction are respectively the same as the distance between the bridging part.

3. The electrical connector assembly of claim 1, wherein: the bridging part is provided with the abutting part and connecting parts positioned on two sides of the abutting part, the connecting parts are used for connecting the abutting part and the wall surface, and the length of the bridging part is greater than that of the connecting parts.

4. The electrical connector assembly of claim 3, wherein: each connecting part is provided with one positioning hole, and the positioning holes are used for fixing the connecting parts on the second back plate.

5. The electrical connector assembly of claim 1, wherein: the electric connector is provided with a plurality of terminals, the circuit board is provided with a mounting area, the terminals are arranged on the circuit board in a matrix mode so as to form the mounting area, and the projection of the mounting area in the vertical direction covers the projection of the groove, the abutting part and the supporting part in the vertical direction.

6. The electrical connector assembly of claim 1, wherein: the first back plate is provided with a first appearance contour line, the second back plate is provided with a second appearance contour line, and the projections of the first appearance contour line and the second appearance contour line in the up-down direction are overlapped.

7. The electrical connector assembly of claim 1, wherein: the abutting part is provided with a first abutting surface and a second abutting surface which are oppositely arranged up and down, the first abutting surface is higher than the first back plate top surface and the second back plate top surface, the first abutting surface abuts against the lower surface, and the second abutting surface is located above the supporting part and abuts against the supporting part.

8. The electrical connector assembly of claim 1, wherein: an accommodating groove is concavely arranged on the bottom surface of the first back plate, the accommodating groove and the abutting part are oppositely arranged up and down, and the supporting part protrudes into the accommodating groove.

9. The electrical connector assembly of claim 8, wherein: the receiving groove is formed by the abutting portion being arched toward the circuit board.

10. The electrical connector assembly of claim 1, wherein: the abutting portion passes through and extends along a center line of the first back plate in the length direction.

11. The electrical connector assembly of claim 1, wherein: the electronic module is arranged above the electric connector from top to bottom, and the projection of the electronic module in the vertical direction covers the projection of the abutting part and the support part in the vertical direction.