CN111952747A

CN111952747A - Card edge connector

Info

Publication number: CN111952747A
Application number: CN202010634900.7A
Authority: CN
Inventors: 赵志斌; 唐文军
Original assignee: Chongqing Hongteng Technology Co ltd; Hongteng Precision Technology Co Ltd
Current assignee: Chongqing Hongteng Technology Co ltd; Hongteng Precision Technology Co Ltd; Foxconn Interconnect Technology Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2020-11-17
Also published as: TWM623128U

Abstract

A card edge connector comprises an insulating body, a row of first terminals, a row of second terminals and a shielding piece, wherein the insulating body comprises a front end face and a rear end face which are opposite, and a clamping groove which penetrates through the front end face; the shielding piece is coated on the rear end face of the insulating body, three grounding fingers are arranged at the position corresponding to each grounding terminal, and the three grounding fingers are arranged along the vertical direction and abut against the same grounding terminal. The shielding part is abutted to the same grounding terminal through a plurality of grounding fingers in the vertical direction, so that resonance is improved, and high-speed signal transmission performance is met.

Description

Card edge connector

[ technical field ] A method for producing a semiconductor device

The present invention relates to a card edge connector.

[ background of the invention ]

Utility model patent No. CN210628555U discloses a DDR connector. The connector comprises a socket and a bracket connected to two ends of the socket, wherein a slot is arranged in the socket, a first terminal hole and a second terminal hole are respectively arranged at two ends of the slot, a first terminal is arranged in the first terminal hole, a second terminal is arranged in the second terminal hole, a first jack and a second jack are arranged at one end, close to the socket, of the bracket, a support plate is inserted in the first jack and is positioned under the bracket, the support plate comprises a first inserting part inserted in the first jack, a cushion plate part connected to one end of the first inserting part, a support part connected to the lower side of the middle of the cushion plate part, an installation part connected to the bottom of the support part and a first bending part connected to the upper side of the tail end of the cushion plate part, a side baffle is inserted in the second jack and is positioned outside the bracket, the side baffle comprises a second inserting portion inserted in the second inserting hole, a side plate portion connected to one end of the second inserting portion, a second bending portion and a third bending portion, wherein the second bending portion and the third bending portion are connected to the upper side and the lower side of the tail end of the side plate portion respectively, the tail end of the support is provided with a clamping portion, the second bending portion is connected with the upper end of the clamping portion in a buckling mode, and the third bending portion is clamped between the first bending portion and the supporting portion. However, as the rate increases, the performance requirements for signal transmission increase, and the DDR connector described above does not meet the requirements.

Therefore, there is a need for a retrofit for existing electrical connectors to overcome the above-mentioned deficiencies.

[ summary of the invention ]

The present invention is directed to a card edge connector capable of improving resonance and satisfying high-speed signal transmission performance.

In order to achieve the purpose, the invention adopts the following technical scheme: a card edge connector comprises an insulating body, a row of first terminals, a row of second terminals and a shielding piece, wherein the insulating body comprises a front end face and a rear end face which are opposite, and a clamping groove which penetrates through the front end face; the row of second terminals comprises signal terminals and at least one grounding terminal, the shielding piece is coated on the rear end face of the insulating body, three grounding fingers are arranged at the position, corresponding to each grounding terminal, of the shielding piece, and the three grounding fingers are arranged in the vertical direction and abut against the same grounding terminal.

Compared with the prior art, the grounding piece can effectively improve the high-frequency performance of the card edge connector.

[ description of the drawings ]

Fig. 1 is a perspective view of the card edge connector of the present invention.

Fig. 2 is a perspective view of fig. 1 from another perspective.

Fig. 3 is a partially exploded perspective view of fig. 2.

Fig. 4 is a sectional view taken along a broken line a-a of fig. 1.

Fig. 5 is a sectional view taken along the direction of the broken line B-B in fig. 1.

Fig. 6 is a sectional view taken along the direction of the dotted line C-C in fig. 1.

[ description of element symbols ]

Elastic parts 21, 31 of card edge connector 100

Terminal

210, 310 of insulating body 10

Front end face 11

holding parts

22, 32

Rear end face 12

legs

23, 33

Card slot 13 shield 40

Fixing

grooves

142, 152 grounding finger 42

Grounding pin 41 penetrating through

grooves

143 and 153

Escape chute 154 window 43

Holding slot 16 circuit board 900

First terminal 20 spacer 901

Second terminal 30 Signal terminal 30S

Ground terminal 30G

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

[ detailed description ] embodiments

Fig. 1 to 6 show a card edge connector of the present invention for inserting an m.2module or m.2 card for transmitting a PCI-EXPRESS signal, and the detailed structure thereof will be described in detail.

Referring to fig. 1 to 3, the card edge connector 100 includes an insulative housing 10, a row of first terminals 20, a row of second terminals 30, and a shielding member 40. The insulating body 10 includes a front end surface 11 and a rear end surface 11 opposite to each other, and a slot 13 penetrating through the front end surface 11. As can be seen from fig. 4, the card slot 13 extends forward, and the upper wall of the card slot is shorter and located behind the lower wall for oblique insertion of the daughter card.

As shown in fig. 4, the first terminal 20 is inserted into the insulating housing 10 from the front end surface 11. The first terminal 20 includes a fixing portion 22, an elastic portion 21 extending from the fixing portion to the card slot 13, and a pin 23, wherein the elastic portion 21 has a contact portion 210 protruding into the card slot. The fixing portion 22 of the first terminal is fixed to the insulating body adjacent to the front end face 11. The fixing portion 22 of the first terminal is vertical and includes a first interference portion 241 and a second interference portion 242 protruding backward, the first and second interference portions are arranged along the vertical direction, the first interference portion 241 is located at the boundary between the fixing portion 22 and the elastic portion 21, and the second interference portion 242 is located at the position close to the pin 23. The insulating body 10 has a plurality of vertical grooves (not numbered, i.e., the places accommodated by the fixing portions 22) recessed rearward from the front end surface 11, fixing grooves 142 extending rearward from the vertical grooves, and through grooves 143 located at the top ends of the vertical grooves and communicating with the card slots, wherein the fixing portions 22 of the first terminals are accommodated in the vertical grooves, the first and second interference portions are fixed in the fixing grooves 142 in a hard interference manner, and the elastic portions 21 are accommodated in the through grooves 143 and are elastically deformable in the through grooves 143. The two sides of the fixing part are fixed in the vertical groove in an interference mode, and the heads of the first interference part and the second interference part are provided with barbs, so that the hard interference force is increased.

Referring to fig. 5, the second terminal 30 includes a fixed portion 32, an elastic portion 31 extending from the fixed portion to the card slot 13, and a pin 33, wherein the elastic portion 31 has a contact portion 310 protruding into the card slot. The fixed portion 32 of the second terminal is secured to the housing adjacent the rear face 12. The fixing portion 32 of the second terminal is vertical and includes a first interference portion 341 and a second interference portion 342 protruding backward, the first and second interference portions are arranged along the vertical direction, the first interference portion 341 is located at the boundary between the fixing portion 32 and the elastic portion 31, and the second interference portion 342 is located at the position close to the pin 33. The insulating body 10 has a plurality of vertical grooves (not numbered, i.e., the places accommodated by the fixing portions 32) whose rear end surfaces are recessed forward, fixing grooves 152 extending rearward from the vertical grooves, and penetrating grooves 153 located above the vertical grooves and penetrating forward from the rear end surfaces to the card slots, the fixing portions 32 of the second terminals are accommodated in the vertical grooves, the first and second interference portions are fixed in the fixing grooves 152 in a hard interference manner, and the elastic portions 31 are accommodated in the penetrating grooves 153 and elastically deformable in the penetrating grooves 143. The two sides of the fixing part 32 are fixed in the vertical groove in an interference mode, and the heads of the first interference part and the second interference part are provided with barbs, so that the hard interference force is increased. The front and

rear end surfaces

11, 12 are provided with a plurality of material escape slots 154 parallel to the horizontal slots for improving the manufacturing process.

With reference to fig. 4-5, contact portion 210 of the first terminal extends into card slot 13 from front to back, and contact portion 310 of the second terminal extends into card slot 13 from back to front; the contact portion 210 of the first terminal is located in front of the contact portion 310 of the second terminal and lower than the contact portion of the second terminal, and the elastic portions 21 and 31 are elastically deformable, so that the

contact portions

210 and 310 can rotate within the card slot at a small angle for achieving stable electrical connection after the electronic card is obliquely inserted.

Referring to fig. 2-3, the shielding member 40 is a one-piece plate-shaped structure, and two ends of the shielding member are bent forward to be inserted into the holding groove 16 formed in the insulating housing and cover the rear end surface 12 of the insulating housing, so that the shielding member 40 transversely covers all the second terminals 30. Specifically, referring to fig. 4-5, the shield 40 extends upward to a position adjacent to the first interference portion 341 of the second terminal 30 and downward to a position adjacent to the pin 33, so that it can function as good EMI or magnetic stripe . The leg 33 extends rearward beyond the rear end 12, and the shielding member 40 is spaced rearward from the leg 33 by a predetermined distance from the rear end 12.

With reference to fig. 5-6, the row of second terminals 30 includes signal terminals 30S and ground terminals 30G, the basic structure of the signal terminals and the ground terminals is the same, the second terminals 30 are formed by stamping metal plates, the plane of the metal plates is perpendicular to the arrangement direction of the second terminals 30, the fixing portion 32 is vertical, and the

interference portions

341 and 342 protrude forward from the front edge of the fixing portion. The shield 40 is provided with three ground fingers 42 corresponding to each ground terminal 30G, and the shield has a rectangular window 43 structure corresponding to each ground finger, and the ground fingers extend upward and forward from the lower edge of the window 43. The three ground fingers 42 are arranged in the vertical direction and abut against the same ground terminal; the three ground fingers corresponding to each ground terminal are aligned in the vertical direction, and all the ground fingers are aligned in three rows in the terminal arrangement direction, as shown in fig. 3.

The grounding finger 42 abuts against the grounding terminal 30G, so that the grounding terminal 30 and the shielding member 40 are electrically connected to each other. The ground terminals 30G in the row of second terminals are connected together by the shielding member 40, improving resonance between the terminals, thereby achieving improved electrical performance in terms of return loss, insertion loss, and crosstalk of the card edge connector. Extending below both sides of the shield 40 are grounding pins 41 which can be soldered to grounding pads 901 of the circuit board 900.

In summary, the above is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.

Claims

1. A card edge connector comprises an insulating body, a row of first terminals, a row of second terminals and a shielding piece, wherein the insulating body comprises a front end face and a rear end face which are opposite, and a clamping groove which penetrates through the front end face; the method is characterized in that: the shielding piece is coated on the rear end face of the insulating body, three grounding fingers are arranged at the position corresponding to each grounding terminal, and the three grounding fingers are arranged along the vertical direction and abut against the same grounding terminal.

2. The card edge connector according to claim 1, wherein: the fixed part of the second terminal is vertical, the fixed part protrudes forwards from the front edge of the fixed part to form a first interference part and a second interference part, the first interference part and the second interference part are fixed on the insulating body, and the three grounding fingers are pressed on the rear edge of the fixed part and are positioned between the first interference part and the second interference part in the vertical direction.

3. The card edge connector as claimed in claim 2, wherein: the grounding finger is a cantilever-shaped structure which is punched out of the shielding piece and extends obliquely upwards.

4. The card edge connector as claimed in claim 3, wherein: the two ends of the shielding piece are bent forwards and inserted into and fixed on the insulating body, and a certain distance is reserved between the grounding piece and the rear end face.

5. The card edge connector according to claim 1, wherein: the shielding part is plate-shaped, extends upwards to a position close to the first interference part and extends downwards to a position close to the pin.

6. The card edge connector according to claim 1, wherein: one row of the first terminals are inserted into the front end face of the insulating body from front to back, the fixing portion of each first terminal is vertical and comprises a first interference portion and a second interference portion which protrude backwards, the first interference portion is located at the junction of the fixing portion and the elastic portion, and the second interference portion is located at the position close to the pins.

7. The card edge connector as claimed in claim 4, wherein: the shielding piece is of a rectangular window structure at the position corresponding to the grounding finger, and the grounding finger extends upwards and forwards from the lower edge of the window.

8. The card edge connector as claimed in claim 7, wherein: and the three grounding fingers corresponding to each grounding terminal are aligned and arranged along the vertical direction, and all the grounding fingers are arranged in three rows along the terminal arrangement direction.

9. The card edge connector according to claim 1, wherein: the contact portions of the first terminals extend into the card slot from front to back and the contact portions of the second terminals extend into the card slot from back to front.

10. The card edge connector as claimed in claim 9, wherein: the contact portion of the first terminal is located forward of and lower than the contact portion of the second terminal.