TWM470407U - Card edge connector - Google Patents

Description

Card edge connector

The present invention relates to a card edge connector, and more particularly to a card edge connector suitable for operation in a high frequency environment.

Taiwan Patent No. M363116 discloses a card edge connector comprising an insulative housing and a conductive terminal held on the insulative housing, the insulative housing having a base and an electronic card slot recessed from a front end surface of the base The conductive terminal includes a holding portion held at the base, an electronic card contact arm extending from one side of the holding portion into the electronic card slot, and a circuit board connecting portion extending from the other side of the holding portion to the base portion, the partial conductive terminal The maximum width of the holding portion, the electronic card contact arm and the circuit board connecting portion is not more than 1.8 times the thickness of the conductive terminal. However, by controlling the relationship between the width and the thickness of the conductive terminals, the card edge connector is difficult to operate in accordance with the high frequency environment control.

SUMMARY OF THE INVENTION The object of the present invention is to provide a card edge connector that increases the contact area of the first row of terminals with air.

In order to solve the above problems, the present invention adopts the following technical solution: a card edge connector for connecting an electronic card and a circuit board, the card edge connector comprising a base and a first row of terminals, the base being provided with an electron penetrating the front end face Card slot, located on both sides of the electronic card slot The first side wall and the second side wall and the end wall connecting the two side walls, the electronic card slot is provided with a key connecting the first and second side walls, the first side wall has a circuit board mounting surface, each first The row terminal includes a holding portion having a first end, an electronic card contact arm extending from one side of the first end of the holding portion into the electronic card slot, and a circuit board extending from the other side of the first end of the holding portion a connecting portion, a front end surface of the first side wall is provided with a holding groove, the holding portion is fixed in the holding groove, and the first side wall is further provided with a channel, the channel communicates with the holding groove, so that each first row of terminals At least a portion of the retaining portion is exposed to the air.

Compared with the prior art, the present invention has the following effects: since the other parameters of the first row of terminals are not changed, only the contact area of the holding portion with the air is increased, the capacitance of the first row of terminals is reduced, and the first row of terminals is added. The reactance, which in turn increases the electrical performance of the card edge connector, facilitates the card edge connector to accommodate high frequency environments.

100‧‧‧ card edge connector

1‧‧‧Insulating body

10‧‧‧ base

101‧‧‧electronic card slot

11‧‧‧First side wall

111‧‧‧The Ministry of Characters

12‧‧‧ second side wall

121‧‧‧Guide

13‧‧‧Keychain

14‧‧‧End wall

141‧‧‧First vertical face

142‧‧‧Second vertical face

143‧‧‧ sloped surface

2‧‧‧Electrical terminals

21‧‧‧First row of terminals

211,221,31‧‧‧Retention Department

212,222‧‧‧electronic card contact arm

213,223‧‧‧Circuit board connection

214,224‧‧‧ first end

215,33‧‧‧ barbed

22‧‧‧second row of terminals

3‧‧‧welding parts

32‧‧‧Weld Department

A, B‧‧‧ length

The first figure is a perspective view of the card edge connector of the present invention; the second figure is a partial exploded view of the card edge connector shown in the first figure; the third figure is a partial decomposition of the other edge of the card edge connector shown in the second figure. Figure 4 is a cross-sectional view taken along line IV-IV of the first figure; and a fifth view is another perspective view of the card edge connector shown in the first figure.

Referring to the first and second figures, the card edge connector 100 mainly includes an insulative housing 1 , a conductive terminal 2 and a soldering member 3 held on the insulative housing.

Referring to the second and third figures, the insulative housing 1 has a base portion 10 disposed longitudinally. The front end surface of the base portion 10 is provided with an electronic card slot 101, and is located at the upper and lower sides of the electronic card slot 101. The second side walls 11 and 12 and the end wall 14 connecting the first and second side walls 11 and 12 have a circuit board mounting surface. The electronic card slot 101 is provided with a key 13 for preventing the mismatched electronic card from being inserted.

The position of the first side wall 11 corresponding to the key 13 is designed to penetrate the I-shaped portion 111 of the front end surface of the first side wall 11. The I-shaped portion 111 is designed to absorb the amount of deformation in which the insulating body is plastically deformed during welding, thereby facilitating adjustment of the flatness of the card edge connector 100. The front end surface of the second side wall 12 is located behind the front end surface of the first side wall 11, and the front end of the second side wall 12 is provided with a guiding portion 121 (refer to FIG. 4) obliquely disposed to the electronic card slot 101 for electronic card. Tilt to insert.

The end wall 14 has a stepped portion that is stepped, and the step portion includes a first vertical surface 141 and a second vertical surface 142. The first vertical surface 141 protrudes from the front end surface of the second side wall 12 and is contracted to the front end surface of the first side wall 11 , and the second vertical surface 142 is retracted to the front end surface of the second side wall 12 . At the stepped portion of the end wall 14, the second side wall 12 is retracted to the inner side of the end wall 14 such that the projection of the second side wall 12 and the end wall 14 in the vertical direction does not coincide. An inclined surface 143 is recessed in the inner side of the front end of the end wall 14 to prevent the electronic card from scratching the end wall 14 when the electronic card is tilted into the horizontal state. The inner side of the inclined surface 143 of the electronic card slot 101 is provided with an upper portion (not labeled) on both sides of the terminal slot (not labeled) and higher than the bottom surface of the electronic card slot 101, and is high when the electronic card is obliquely inserted. The upper part (not labeled) contacts, and the upper part (not labeled) prevents the electronic card from coming into contact with the bottom surface of the electronic card slot 101 to generate plastic chips falling on the conductive terminals, thereby avoiding the occurrence of contact failure.

In conjunction with the fourth figure, the conductive terminal 2 includes a first row of terminals 21 and a second row of terminals 22. The first row of terminals 21 are assembled to the insulative housing 1 from the front end surface of the base portion 10. The first row of terminals 21 includes a retaining portion 211 that is retained on the first side wall 11 . The retaining portion 211 has a first end 214 that abuts against a front end surface of the base portion 10 . The holding portion 211 is provided with an electronic card contact arm 212 extending from the first end 214 into the electronic card slot 101, and the other end of the first end 214 is provided with a circuit board connecting portion extending from the front end surface of the base 10. 213. The holding portion 211 is provided with a barb 215 on a side close to the electronic card contact arm 212. The length A of the holding portion 211 is greater than 0.45 mm and less than 1 mm, and the length A of the holding portion 211 is not more than 0.5 times the length B of the electronic card contact arm.

The second row of terminals 22 are assembled to the insulative housing 1 from the rear end surface of the base 10. The second row of terminals 22 includes a retaining portion 221 that is retained on the second side wall 12 . The retaining portion 221 has a first end 224 that abuts against a rear end surface of the base portion 10 . The holding portion 221 has an electronic card contact arm 222 extending from one side of the first end 224 into the electronic card slot 101 and a circuit board connecting portion 223 extending from the other end of the first end 224 to the rear end surface of the base portion 10. The electronic card contact arm 212 of the first row of terminals 21 and the electronic card contact arm 222 of the second row of terminals 22 are disposed one behind the other and are staggered in the left-right direction. The free end of the electronic card contact arm 222 of the second row of terminals 22 is located behind the guiding portion 121 of the second side wall 12. In the present embodiment, the size and overall size of each structure of the second row of terminals 22 are larger than the dimensions and overall dimensions of the structures of the first row of terminals 21.

The weldment 3 is assembled to the end wall 14 of the card edge connector 100 from the rear end surface of the base 10. The weldment 3 includes a retaining portion 31 that is retained by the end wall 14 and a welded portion 32 that extends rearward from the lower side of the retaining portion 31 beyond the rear end of the base portion 10. The retaining portion 31 is provided with a barb 33 located in front of the welded portion 32 on a side close to the welded portion 32, and the barb 33 interferes with the solid Hold at base 10. The surface area of the holding portion 31 of the soldering member 3 is larger than the surface area of the holding portion of the first and second rows of terminals, and the soldering area of the soldering portion 32 of the soldering member 3 is higher than the board connecting portion of the first and second rows of terminals. The welding area of 213,223 is large. In this way, it is possible to solve the problem that the terminal is made smaller in order to satisfy the small size of the card edge connector 100, and the strength is not high when the card edge connector 100 is soldered to the circuit board.

The length A of the holding portion 211 of the first row of terminals 21 is greater than 0.45 mm and less than 1 mm, and the length A of the holding portion 211 is not more than 0.5 times the length B of the electronic card contact arm 212. When the holding force of the first row of terminals 21 in the insulative housing 1 is satisfied, the length A of the holding portion 211 of the first row of terminals 21 is designed to be relatively small, which is advantageous for miniaturization of the card edge connector. Meanwhile, since the other parameters of the first row of terminals 21 are not changed, merely reducing the length A of the holding portion 211 can reduce the capacitance of the first row of terminals 21, thereby increasing the reactance of the first row of terminals 21, thereby increasing the card edge connector. The electrical performance of 100 facilitates the card edge connector 100 to accommodate high frequency environments.

In summary, this creation has met the requirements of the new patent, and applied for a patent in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the foregoing embodiments, and any equivalent modification or change made by a person familiar with the skill of the present invention in accordance with the spirit of the present invention is It should be covered by the following patent application.

10‧‧‧ base

102,103‧‧‧ channel

104‧‧‧ holding slot

105‧‧‧ wall

110‧‧‧Board mounting surface

121‧‧‧Guide

211‧‧‧ Holding Department

212,222‧‧‧electronic card contact arm

214‧‧‧ first end

Claims (11)

A card edge connector for connecting an electronic card and a circuit board, comprising: a base, an electronic card slot extending through the front end surface, first and second side walls on the two sides of the electronic card slot, and a connection An end wall of the two side walls, the electronic card slot is provided with a key for connecting the first and second side walls, the first side wall has a circuit board mounting surface; and the first row of terminals are fixed to the first side wall, each The first row of terminals includes a retaining portion having a first end, an electronic card contact arm extending from the first end of the retaining portion into the electronic card slot, and the other end of the first end of the retaining portion extending from the base a front surface of the first side wall is provided with a holding groove, and the holding portion is fixed in the holding groove; wherein the first side wall is further provided with a channel, the channel communicates with the holding groove, so that each The retaining portions of the first row of terminals are at least partially exposed to the air. The card edge connector of claim 1, wherein the channel is connected to the upper holding groove from the circuit board mounting face of the first side wall. The card edge connector of claim 1, wherein the channel extends through the holding groove from a rear end surface of the base. The card edge connector of claim 1, wherein the first side wall is provided with a channel extending from the circuit board mounting surface to the upper holding groove and a channel extending from the base rear end surface through the holding groove. The card edge connector of claim 4, wherein the circuit board mounting surface is connected to the channel of the holding groove and communicates with the channel of the rear end surface of the base through the holding groove. A card edge connector according to any one of claims 2 to 5, wherein The inner side of the first end abuts against the front end surface of the first side wall, and one side of the holding portion is provided with a barb, and the holding groove forms a wall surface on the first side wall, and the barb interferes with the wall surface. The card edge connector of claim 5, wherein the card edge connector further comprises a second row of terminals, the second row of terminals comprising a holding portion extending from one end of the holding portion of the second row of terminals The electronic card contact arm and the other end of the holding portion of the second row of terminals extend from the circuit board connecting portion of the base, and the electronic card contact arm of the second row of terminals protrudes from the second side wall to the electronic card slot, The electronic card contact arms of the first row of terminals and the electronic card contact arms of the second row of terminals are arranged one behind the other and are staggered in the left and right direction. The card edge connector of claim 7, wherein the circuit board connecting portion of the first row of terminals extends out of the front end surface of the base, and the circuit board connecting portion of the second row of terminals extends out of the rear end surface of the base; The front end of the second side wall is provided with a guiding portion disposed obliquely facing the electronic card slot, and the guiding portion is located in front of the free end of the electronic card contact arm of the second row of terminals. The card edge connector of claim 1, wherein the left and right ends of the first side wall and the second side wall are connected by an end wall, and the end wall has a stepped portion arranged in a stepped manner, the step The first vertical surface and the second vertical surface, the second side wall protrudes forwardly from the first vertical surface, and the second vertical surface protrudes forwardly from the second side wall to be contracted to the first side wall, the second side The side wall is retracted to the inner side surface of the end wall such that the projection of the second side wall and the end wall in the vertical direction does not coincide. The card edge connector of claim 1 or 7, wherein the card edge connector is further provided with a soldering member, the soldering member comprising a retaining portion held at the base portion and extending from a side of the retaining portion And soldered to the soldering portion of the circuit board, the soldering member is solid The side of the holding portion adjacent to the welding portion is provided with a barb in front of the welding portion, the barb interference is fixed to the base portion, and the area of the holding portion of the welding member is larger than the area of the first row of the terminal holding portion, the welding piece The area of the welded portion is larger than the area of the welded portion of the first row of terminals. The card edge connector of claim 9, wherein an inner side of the front end of the end wall is provided with an inclined surface in the electronic card slot, and the inner side of the inclined surface is disposed on both sides of the terminal slot and is higher than the electronic The upper part of the bottom of the card slot.