Card edge connector

Abstract

This invention provides a card edge connector for inserting an electronic card, including an insulating body, conductive terminals, and a terminal protector. The insulating body has an elongated slot and sidewalls on both sides of the slot's elongation. The conductive terminals are arranged on the sidewalls and include a contact portion exposed to the slot, a head extending upward from the contact portion, a connecting portion extending downward from the contact portion, and a solder portion extending from the connecting portion out of the insulating body. The terminal protector shields the heads of the conductive terminals and guides the electronic card into the slot. The conductive terminals have an inner side facing the slot and an outer side opposite to the inner side. Viewed perpendicular to the sidewalls, the contact portion includes an arcuate segment extending outward from the inner side of the connecting portion, and the head includes a retaining segment extending obliquely outward from the arcuate segment. A concave bend is provided at the connection between the arcuate segment and the retaining segment. The concave bend provides clearance space for the terminal protector, which helps to shorten the length of the conductive terminal head, thereby increasing impedance and reducing the impact of the stub effect on high-frequency transmission.

Description

Technical Field

[0001] This invention relates to card edge connectors, and more particularly to a card edge connector for transmitting high-frequency signals. Background Technology

[0002] For relevant prior art, please refer to the card edge connector disclosed in Chinese Utility Model Patent CN201927741U, which is used to accommodate an expansion card module. It includes an elongated plastic body and several conductive terminals fixed on the plastic body. The plastic body has an elongated receiving cavity for accommodating the expansion card module, and the receiving cavity has a first center line along the insertion direction of the expansion card module. The conductive terminals have a holding portion fixed within the plastic body and a contact portion extending upward from one end of the holding portion into the first receiving cavity for electrical contact with the expansion module. The plastic body includes a first body and a second body separately disposed on both sides of the first center line. The upper ends of the first and second bodies adjacent to each other are formed with a retaining wall to prevent the extended ends of the conductive terminals from extending into the receiving cavity and contacting the expansion card module, thus protecting the conductive terminals from damage. However, the conductive terminals arranged in this way also have a long head above the contact portion, which can easily lead to a stub effect, affecting the high-frequency signal transmission effect of the card edge connector.

[0003] Therefore, it is necessary to provide an improved card edge connector to improve the above-mentioned problems. Utility Model Content

[0004] The technical solution to be solved by this invention is to provide a card edge connector that can improve the transmission performance of high-frequency signals.

[0005] This application provides a technical solution: a card edge connector for inserting an electronic card, comprising an insulating body, a plurality of conductive terminals, and a terminal protector. The insulating body has a longitudinally elongated slot and sidewalls located on both sides of the slot in the longitudinal direction. The conductive terminals are arranged on the sidewalls and include a contact portion exposed to the slot, a head extending upward from the contact portion, a connecting portion extending downward from the contact portion, and a solder portion extending from the connecting portion out of the insulating body. The terminal protector shields the head of the conductive terminal and guides the electronic card to be inserted. The conductive terminal has an inner side facing the slot and an outer side facing the sidewall and opposite to the inner side. When viewed in a direction perpendicular to the sidewall, the contact portion includes an arcuate segment extending outward from the inner side of the connecting portion, and the head includes a retaining segment extending obliquely outward from the arcuate segment. A concave bend is provided at the connection between the arcuate segment and the retaining segment.

[0006] Compared to existing technologies, the concave fold in this invention provides space for the terminal protection component, which helps to shorten the length of the conductive terminal head to increase impedance and reduce the impact of the stub effect on high-frequency transmission. Attached Figure Description

[0007] Figure 1 This is a three-dimensional schematic diagram of the card edge connector for this invention.

[0008] Figure 2 This is a three-dimensional view of a section of the card edge connector used in this creation.

[0009] Figure 3 for Figure 2 A three-dimensional view from another angle.

[0010] Figure 4 for Figure 2 A 3D disassembly diagram.

[0011] Figure 5 for Figure 4 A three-dimensional view from another angle.

[0012] Figure 6 for Figure 4 The terminal module is further disassembled in a three-dimensional exploded view.

[0013] Figure 7 For along Figure 2 A cross-sectional view along line AA in the middle.

[0014] Figure 8 for Figure 7 A cross-sectional view of the inserted electronic card.

[0015] Component Symbol Explanation

[0016] Card edge connector 100, electronic card 200, insulating body 10

[0017] Slot 11, Side wall 12, Receiving slot 121

[0018] Floating gap 122, conductive terminal 20, contact portion 21

[0019] Arc-shaped segment 211 Head 22 Supporting segment 221

[0020] 23 Connecting part 24 Welding part 25 Inner side surface

[0021] 26 Outer side concave 27 Terminal protection piece 30

[0022] Contact part 31 Base part 32 Extension part 33

[0023] Floating head 34, bump 341, protective groove 342

[0024] Gap 35, Terminal module 40, Insulating block 41

[0025] Dovetail groove 411 Dovetail protrusion 412. Detailed Implementation

[0026] The following will combine Figures 1 to 8 This article describes the specific implementation of the card edge connector of this utility model.

[0027] Figure 1 This is a perspective view of the card edge connector 100 of this utility model. The card edge connector 100 is longitudinally arranged and mounted on a circuit board (not shown) to receive an electronic card 200 (see Figure 100). Figure 8 The edge connector 100 includes an insulating body 10 and a plurality of conductive terminals 20. The insulating body 10 has a longitudinally elongated slot 11 and sidewalls 12 located on both sides of the slot 11 along its longitudinal direction. The conductive terminals 20 are arranged on the sidewalls 12. The edge connector 100 of this utility model can be mounted to a circuit board using either surface mount technology or through-hole mounting technology. Different mounting methods correspond to different conductive terminal soldering parts. Figure 1 The 3D schematic diagram of the card edge connector shows that through-hole mounting technology is used for installation. Figures 2 to 8 For the portion of the connector that is cut off, surface mount technology is selected for installation. Figure 1 This illustration is only intended to show the basic appearance of the card edge connector for ease of understanding and does not constitute a substantial impact on the technical solution of this utility model.

[0028] See Figures 2 to 7 The conductive terminals 20 are arranged on the sidewall 12 and include a contact portion 21 exposed to the slot 11, a head 22 extending upward from the contact portion 21, a connecting portion 23 extending downward from the contact portion 21, and a solder portion 24 extending from the connecting portion 23 to the insulating body 10. The contact portion 21 can make electrical contact with the electronic card 200 inserted into the slot 11, and the solder portion is mounted on the circuit board.

[0029] See Figure 2 Figure 3 and Figure 7 The card edge connector 100 includes a terminal protection member 30, which shields the head 22 of the conductive terminal 20 and guides the electronic card to be inserted. Figure 7 This refers to the state when the electronic card is not inserted into slot 11, combined with... Figure 8Initially, when the electronic card is inserted into the slot 11, the terminal protector 30 guides the insertion. As the electronic card continues to be inserted, the contact portion 21 of the conductive terminal is abutted by the electronic card and moves within the terminal protector 30 in a transverse direction perpendicular to the longitudinal direction. The terminal protector 30 has an abutment portion 31 protruding towards the slot 11, which covers the head 22 of the conductive terminal 20 and abuts against the electronic card. The side wall 12 near the slot 11 has a recessed receiving groove 121, and the terminal protector 30 is disposed in the receiving groove 121. In the transverse direction, a floating gap 122 is provided between the receiving groove 121 and the terminal protector 30. The terminal protector 30 protects the head 22 of the conductive terminal 20, effectively preventing the head 22 of the conductive terminal from being exposed and damaged by the electronic card.

[0030] Combination Figure 2 , Figure 6 and Figure 7 The conductive terminal 20 has an inner surface 25 facing the slot 11 and an outer surface 26 facing the sidewall 12 and opposite to the inner surface 25. Viewed perpendicular to the sidewall, the contact portion 21 includes an arcuate segment 211 extending outward from the inner surface 25 of the connecting portion 23. The head 22 includes a supporting segment 221 extending obliquely outward from the arcuate segment 211. A recessed bend 27 is provided at the connection between the arcuate segment 211 and the supporting segment 221, so that the contact portion 21 is a protruding structure at the arcuate segment 211. Figure 7 As shown, before the electronic card 200 is inserted into the slot 11, the abutting section 221 abuts against the terminal protection member 30; combined with Figure 8 As described earlier, after the electronic card 200 is inserted into the slot 11, the arc-shaped segment 211 contacts the electronic card 200, and the abutting segment 221 floats in contact with the terminal protection member 30. This arrangement helps to shorten the length of the conductive terminal head 22 to improve the high-frequency transmission performance of the card edge connector 100. As described in the background art, in order to prevent the conductive terminal from being damaged by the insertion of the electronic card, the head of the conductive terminal is generally set to be relatively long, which is prone to the stub effect and thus affects the high-frequency transmission performance. If the head of the conductive terminal is shortened, the terminal protection member needs to be adapted to be set downward and inward in order to shield the head of the conductive terminal, which may lead to poor contact stability between the electronic card and the conductive terminal contact part. Therefore, setting the concave fold 27 is equivalent to thinning the conventional terminal head on the inner side, thereby making room for the terminal protection member 30, which helps to shorten the length of the conductive terminal head 22 and ensures that the electronic card 200 can make stable contact with the contact part 21 of the conductive terminal after insertion.

[0031] To optimize the protruding structure of the contact portion 21, in a preferred embodiment, the radius of the arc-shaped segment 211 is smaller than the thickness of the connecting portion 23. Combined with Figure 7 Viewed perpendicular to the sidewall, the concave fold 27 is located between the extension lines of the inner side surface 25 and the outer side surface 26 of the connecting portion 23. The inner side surface 25 of the head 22 is connected to the contact portion 21, and the outer side surface 26 of the head 22 is connected to the outer side surface 26 of the connecting portion 23. In order to make way for the terminal protection member 30, in this embodiment, the thickness of the head 22 is less than the thickness of the connecting portion 23.

[0032] The conductive terminal 20 of this invention has a short head 22. Viewed perpendicular to the sidewall, the length of the inner surface 25 of the head 22 is less than twice the thickness of the connecting portion 23, and the length of the outer surface 26 of the head 22 is greater than twice the thickness of the connecting portion 23 but less than three times the thickness of the connecting portion 23. In a preferred embodiment, the thickness of the connecting portion 23 is 0.25 mm, the radius of the arc segment 211 is 0.15 mm, and the thickness of the head 22 is 0.2 mm; viewed perpendicular to the sidewall, the length of the inner surface 25 of the head 22 is 0.46 mm, and the length of the outer surface 26 of the head 22 is 0.62 mm.

[0033] like Figure 4 and Figure 5 As shown, the terminal protection member 30 has a base 32, an extension 33 extending upward from the base 32, and a floating head 34 extending upward from the extension 33. The floating head 34 shields the head 22 of the conductive terminal 20. The extension 33 and the connection portion 23 of the conductive terminal are arranged parallel to each other, and a gap 35 is provided between them, which helps to reduce the impedance of the conductive terminal 20 at the connection portion 23. Figure 7 and Figure 8 In this embodiment, when the abutting section 221 abuts against the terminal protection member 30, the gap is 0.15 mm. The floating head 34 is provided with a protrusion 341 inserted into the receiving groove 121, and the floating head 34 is provided with a protective groove 342 corresponding to the head 22. The protective groove 342 opens downward, and the head 22 is located in the protective groove 342. When the electronic card is initially inserted into the slot 11, the abutting part 31 can be pushed laterally, that is, the protrusion 341 moves laterally in the floating gap 122. As the electronic card continues to be inserted, the head 22 can be pushed to move laterally in the protective groove 342, and the abutting section 221 disengages from the terminal protection member 30. At this time, the gap 35 is 0.12 mm.

[0034] See Figures 2 to 5The edge connector 100 includes at least two terminal modules 40. Each terminal module 40 includes an insulating block 41 and conductive terminals 20 fixed to the insulating block 40. Each terminal module 40 has a row of conductive terminals 20. In this embodiment, when assembling the edge connector 100, the terminal protection member 30 is inserted into the receiving groove 121 provided on the side wall 12 from bottom to top. The two terminal modules 40 are first assembled together and then inserted between the corresponding terminal protection members 30 on the two side walls 12. The head 22 is disposed in the protection groove 342. The two terminal modules 40 are assembled together by providing complementary dovetail grooves 411 and dovetail protrusions 412 on the opposing insulating blocks 41.

[0035] The above are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of this utility model should still fall within the scope of this utility model patent.

Claims

1. A card edge connector for receiving an electronic card, comprising an insulating body, a plurality of conductive terminals and a terminal protection member, said insulating body having a longitudinal slot and side walls on both sides of said slot in the longitudinal direction, said conductive terminals being arranged on said side walls and comprising contact portions exposed to said slot, head portions extending upwardly from said contact portions, connecting portions extending downwardly from said contact portions, and solder portions extending out of the insulating body from said connecting portions, said terminal protection member shielding the head portions of said conductive terminals and guiding the insertion of the electronic card, characterized in that: The conductive terminal has an inner side facing the slot and an outer side facing the sidewall and opposite to the inner side. When viewed in a direction perpendicular to the sidewall, the contact portion includes an arc-shaped segment extending outward from the inner side of the connection portion, and the head includes a supporting segment extending obliquely outward from the arc-shaped segment. A concave fold is provided at the connection between the arc-shaped segment and the supporting segment.

2. The card edge connector of claim 1, wherein: The radius of the arc segment is smaller than the thickness of the connecting part.

3. The card edge connector of claim 1, wherein: Before the electronic card is inserted into the slot, the abutting section abuts against the terminal protector; after the electronic card is inserted into the slot, the arc-shaped section contacts the electronic card, and the abutting section floats in contact with the terminal protector.

4. The card edge connector of claim 1, wherein: The contact portion is a raised structure at the arc-shaped segment.

5. The card edge connector as described in claim 4, characterized in that: Viewed along a direction perpendicular to the sidewall, the concave fold is located between the extension lines of the inner and outer sides of the connecting portion.

6. The card edge connector as described in claim 1, characterized in that: The thickness of the head is less than the thickness of the connecting part.

7. The card edge connector as described in claim 1, characterized in that: The inner side of the head is connected to the contact portion, and the outer side of the head is connected to the outer side of the connecting portion.

8. The card edge connector as described in claim 7, characterized in that: Viewed along a direction perpendicular to the sidewall, the length of the inner side of the head is less than twice the thickness of the connecting portion.

9. The card edge connector as described in claim 7, characterized in that: Viewed along a direction perpendicular to the sidewall, the length of the outer side of the head is greater than twice the thickness of the connecting portion and less than three times the thickness of the connecting portion.

10. The card edge connector as described in claim 7, characterized in that: The thickness of the connecting part is 0.25 mm, the radius of the arc segment is 0.15 mm, and the thickness of the head is 0.2 mm; Viewed along a direction perpendicular to the thickness of the conductive terminal, the length of the inner side of the head is 0.46 mm, and the length of the outer side of the head is 0.62 mm.

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