CN223911939U

CN223911939U - A high-speed card edge connector

Info

Publication number: CN223911939U
Application number: CN202522585305.XU
Authority: CN
Inventors: 袁潇; 邓忠诚; 杨旭
Original assignee: Shenzhen Electric Connector Technology Co Ltd
Current assignee: Shenzhen Electric Connector Technology Co Ltd
Priority date: 2025-12-05
Filing date: 2025-12-05
Publication date: 2026-02-13
Anticipated expiration: 2035-12-05

Abstract

The utility model discloses a high-speed card edge connector which comprises a plastic main body, a terminal group, a grounding strip, a rear cover and a shell, wherein the plastic main body comprises a first plastic main body and a second plastic main body, the first plastic main body and the second plastic main body are respectively provided with a first slot and a second slot, the terminal group comprises a plurality of contact terminals arranged on two sides of the first slot and power terminals arranged on two sides of the second slot, the grounding strip comprises a plurality of shielding plates and connecting arms, the rear cover is arranged at the bottom of the first plastic main body, welding grooves are formed in the side walls of two long sides of the rear cover, and a plurality of fixing clamping positions are formed in the side walls of the rear cover.

Description

High-speed card edge connector

Technical Field

The present utility model relates to the field of electrical connectors, and in particular, to a high-speed card edge connector.

Background

In the field of modern electronic engineering, a card edge connector is a critical component for achieving a fast and efficient electrical connection between the edge of a printed circuit board and external equipment. The connector is characterized in that its terminals are arranged along the edge of the circuit board so that the connector can be directly connected with the conductive paths of the circuit board, thereby reducing the space required for connection and simplifying the assembly process. Card edge connectors are widely used to connect expansion cards, which may include high performance components such as graphics processing units, network cards, memory controller cards, etc., to a motherboard within an electronic device. Through a PCIe interface, the expansion cards can realize high-speed data transmission, and meet the requirements of a modern computer system for large bandwidth and low delay. In addition, card edge connectors are also widely used in the fields of data centers, servers, and industrial automation for connecting various high-speed interface devices.

The structure of the card edge connector mainly comprises an insulating body and a series of conductive terminals which are closely arranged and accommodated in the insulating body. The dielectric body typically has two opposing sidewalls forming a central slot for receiving and guiding the edge insertion of the expansion card. The insulating body in the prior art is generally a strip plastic main body, the structure has poor performance on resisting transverse vibration impact, particularly when the expansion card is inserted and has a certain load weight, the cracking phenomenon is particularly remarkable, and the stability and the reliability of high-frequency and high-speed signal transmission of the card edge connector are seriously affected. With the rapid development of the 5G electronic industry, a card edge connector with a high-strength structure is more and more required for a computer, and therefore, it is necessary to provide a card edge connector with an improved structure to overcome the above-mentioned drawbacks.

Disclosure of utility model

The utility model aims to design a high-speed card edge connector to solve the problems in the prior art.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The high-speed card edge connector comprises a plastic main body, a terminal group, a grounding strip, a rear cover and a shell, wherein the plastic main body comprises a first plastic main body and a second plastic main body embedded in the first plastic main body, a first slot and a second slot are respectively formed in the first plastic main body and the second plastic main body, the first slot and the second slot are positioned on the same straight line for plugging an expansion card, the terminal group comprises a plurality of contact terminals arranged on two sides of the first slot and power terminals arranged on two sides of the second slot, each row of contact terminals comprises signal terminals and grounding terminals which are arranged at intervals, the grounding strip is arranged close to the contact terminals and comprises a plurality of shielding plates covered on the same side of the signal terminals and connecting arms used for being connected with the same-side grounding terminals in a one-to-one correspondence mode, the rear cover is mounted at the bottom of the first plastic main body, welding grooves for extending out of the contact pins of the rear cover are formed on two long side walls of the rear cover, the contact terminals are formed and the contact terminals and the power terminals are arranged on two sides of the first plastic main body, and the contact terminals and the first fixing sheet is arranged close to the first fixing sheet and the first fixing sheet is arranged at the bottom of the first plastic main body.

Further, a first puncture structure is arranged at the top of the reinforcement shell, a first fixing groove matched with the first puncture structure is formed in the first plastic main body, two side walls of the reinforcement shell are concaved inwards to form fixing parts, and the fixing parts clamp the first plastic main body.

Further, the fixing piece is protruded from bottom to top to form a second puncture structure, a second fixing groove matched with the second puncture structure is formed in the first plastic main body, the second puncture structure is abutted to the second fixing groove, and the shell is of an integrated structure.

Further, a plastic retainer is formed at the fixing portion of each row of contact terminals by insert molding, and the plastic retainer is used for fixing the signal terminals and the ground terminals.

Further, the plastic retainer is provided with a buckling part, and the side wall of the plastic main body is provided with a bayonet matched with the buckling part.

Further, a positioning hole is formed in the shielding plate, and a positioning lug matched with the positioning hole is further arranged on the plastic retainer.

Further, the connecting arm comprises two symmetrically arranged welding pieces, and the two welding pieces are welded on the fixing part of the same grounding terminal.

Further, the fixed clamping positions are uniformly arranged along the welding path of the contact terminal and the high-speed cable, each fixed clamping position comprises two clamping arms which are arranged in a mirror symmetry mode, and a limiting clamping groove is formed between the two clamping arms.

Further, connecting seats are further arranged at two ends of the first plastic main body, and fixing holes are formed in the connecting seats.

Further, a positioning column for fixing the first plastic body on the main board is further arranged at the bottom of the first plastic body.

The high-speed card edge connector has the beneficial effects that the shell with the integrated structure comprises the reinforcing shell and the fixing pieces, the fixing parts formed by the concave parts at the two sides of the reinforcing shell provide holding force for the plastic main body, the transverse vibration and impact resistance of the connector is enhanced, the first puncture structure is arranged at the top of the reinforcing shell and is matched with the plastic main body, the connector is prevented from shaking left and right, the stability of signal transmission is enhanced, the high-frequency high-speed signal transmission quality and the performance reliability are improved, the second puncture structure is formed by the protruding fixing pieces, the second puncture structure is abutted in the plastic main body, and when the connector is welded on a main board, the shell is effectively prevented from being ejected, and the stability of the connector structure is enhanced. And the shell is formed by stamping, so that the manufacturing process is simple, the contact is more stable, the reliability is higher, and the production is convenient.

Drawings

The drawings in the following description are only examples of embodiments from which other drawings may be derived by those skilled in the art without the exercise of inventive faculty. In the drawings:

Fig. 1 is a schematic diagram of the overall structure of a high-speed card edge connector according to an embodiment of the present utility model;

Fig. 2 is a schematic diagram of an overall structure of a high-speed card edge connector according to another view angle of the present utility model

FIG. 3 is an exploded view of a high-speed card edge connector according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of an internal structure of a high-speed card edge connector according to an embodiment of the present utility model;

Fig. 5 is a schematic partial enlarged view illustrating a fixing manner of a contact terminal in a high-speed card edge connector according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a high-speed card edge connector according to an embodiment of the present utility model;

Fig. 7 is a schematic structural diagram of a grounding strip in a high-speed card edge connector according to an embodiment of the present utility model;

FIG. 8 is a schematic structural view of a first plastic body of a high-speed card edge connector according to an embodiment of the present utility model;

fig. 9 is a schematic structural diagram of a housing in a high-speed card edge connector according to an embodiment of the present utility model;

Fig. 10 is a schematic structural diagram of a signal terminal in a high-speed card edge connector according to an embodiment of the present utility model;

Fig. 11 is a schematic structural diagram of a grounding terminal in a high-speed card edge connector according to an embodiment of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

The connector comprises a first plastic body-1, a first slot-101, a first fixing slot-102, a second fixing slot-103, a bayonet-104, a connecting seat-105, a positioning column-106, a second plastic body-2, a second slot-201, a contact terminal-3, a signal terminal-301, a first fixing part-3011, a first pin-3012, a first terminal body-3013, a first contact part-3014, a grounding terminal-302, a second fixing part-3021, a second pin-3022, a second terminal body-3023, a second contact part-3024, a power terminal-4, a grounding strip-5, a shielding plate-501, a welding sheet-502, a positioning hole-503, a rear cover-6, a welding slot-601, a clamping arm-602, a housing-7, a reinforcing housing-701, a first piercing structure-7011, a fixing part-7012, a fixing sheet-702, a second piercing structure-7021, a plastic holder-8, a buckling part-801 and a positioning bump-802.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model provides a high-speed card edge connector which comprises a plastic main body, a terminal group, a grounding strip, a rear cover and a shell. Specific:

As shown in fig. 1 to 3, in this embodiment, the plastic body is used as a mounting substrate of the whole connector, and includes a first plastic body 1 and a second plastic body 2 embedded in the first plastic body 1, a first slot 101 and a second slot 201 are respectively provided on the first plastic body 1 and the second plastic body 2, the first slot 101 and the second slot 201 are on the same straight line for plugging an expansion card, connecting seats 105 are provided at two ends of the first plastic body 1, fixing holes are provided in the connecting seats 105, corresponding mounting holes matched with the fixing holes are provided on a motherboard, and the first plastic body 1 is mounted on the motherboard through bolts and nuts. Further, in order to improve the installation accuracy of the first plastic body 1, the bottom of the first plastic body 1 is further provided with a positioning column 106 and a fixing piece 702, the positioning column 106 is used as a positioning reference, an assembly worker can be assisted to align the first plastic body 1 with the main board quickly, and then the fixing piece 702 is inserted into a jack corresponding to the main board and welded, so that the first plastic body 1 can be fixed on the main board accurately.

The terminal group comprises a plurality of contact terminals 3 and a plurality of power terminals 4, wherein the power terminals 4 are arranged in terminal mounting grooves on two sides of the second slot 201 and used for supplying power to the expansion card, and the contact terminals 3 are arranged in terminal mounting grooves on two sides of the first slot 101 and used for transmitting data. Each row of contact terminals 3 includes a plurality of signal terminals 301 and ground terminals 302 arranged at intervals. The contact terminal 3 includes a holding portion, a pin, a terminal body, and an elastic contact portion (referring to fig. 10 and 11, the signal terminal 301 includes a first holding portion 3011, a first pin 3012, a first terminal body 3013, and a first contact portion 3014, and the ground terminal 302 includes a second holding portion 3021, a second pin 3022, a second terminal body 3023, and a second contact portion 3024). The contact terminal 3 is integrally formed, a fixing portion of the contact terminal 3 is clamped in a terminal mounting groove of the first plastic body 1 so as to fix the whole contact terminal 3, the pin is arranged below the fixing portion and extends downwards and is exposed out of the bottom of the first plastic body 1, the terminal body is arranged above the fixing portion and extends into the first slot 101, and the elastic contact portion is arranged at the tail end of the terminal body and is used for being in contact conduction with an expansion card.

As shown in fig. 3 to 7, the grounding bar 5 is provided on the front surface of the contact terminal 3 (i.e., the surface opposite to the elastic contact portion of the contact terminal 3), and includes a plurality of shield plates 501 and connection arms for connection to the same-side grounding terminals 302 in a one-to-one correspondence. The length of the shielding plate 501 is not smaller than the outer distance of each pair of signal terminals 301, and the width of the shielding plate 501 is the same as the length of the holding portion of the signal terminal 301, so that the shielding plate 501 can just cover the holding portion of each pair of signal terminals 301 on the same side to block and absorb electromagnetic waves, and reduce the influence of external electromagnetic interference on signals. The connecting arm comprises two welding pieces 502 which are arranged symmetrically up and down, and the two welding pieces 502 are welded on the fixing part of the same grounding terminal 302. The grounding strips 5 electrically conduct the grounding terminals 302, so that a more stable and uniform reference plane can be formed, resonance between differential signal terminals is effectively reduced, and signal integrity in the high-frequency high-speed signal transmission process is improved. Of course, the grounding strip 5 may be disposed on the back of the contact terminal 3, so as to have better anti-resonance effect, and to reduce mutual interference between signals inside the connector more effectively, thereby improving high-frequency performance of the connector.

As shown in fig. 4 to 6, in the present embodiment, the rear cover 6 is mounted at the bottom of the first plastic body 1 in a press-fit manner, so that contact points inside the connector can be protected, the influence of external environmental factors such as dust and moisture can be reduced, and the service life of the connector can be prolonged. A row of welding grooves 601 are further formed in the two long side walls of the rear cover 6, pins of the contact terminal 3 can extend out to be welded with the high-speed cable, a plurality of fixing clamping positions used for limiting tin wires are further formed in the outer surface of the rear cover 6, the fixing clamping positions are evenly distributed at intervals along a welding path of the contact terminal 3 and the high-speed cable, each fixing clamping position comprises two clamping arms 602 which are arranged in a mirror symmetry mode, and the distance between the two clamping arms 602 is slightly larger than the outer diameter of the tin wires, so that a clamping groove capable of placing and fixing soft tin wires is formed.

As shown in fig. 6 to 9, the housing 7 is assembled on the side portion of the first plastic body 1, and includes a fastening shell 701 adjacent to the first slot 101 and a fixing piece 702 disposed at the bottom of the first plastic body 1, and the housing 7 is of an integrally formed structure, so that the stamping process is simple, the reliability is higher, and the production is facilitated. Further, the top of the reinforcement shell 701 is provided with a first piercing structure 7011, the first plastic body 1 is provided with a first fixing groove 102 adapted to the first piercing structure 7011, in this embodiment, the first piercing structures 7011 are provided with two parts, cooperate with the first plastic body 1, reinforce the plastic body and prevent the plastic body from shaking left and right, the two side walls of the reinforcement shell 701 are concave inwards to form a fixing part 7012, the fixing part 7012 clamps the first plastic body 1, so that the structural strength of the connector is improved, the transverse vibration and impact resistance of the connector is enhanced, and the reliability of the connector performance and the stability of signal transmission are improved. The fixing piece 702 is protruded from bottom to top to form a second piercing structure 7021, a second fixing groove 103 matched with the second piercing structure 7021 is formed in the first plastic main body 1, the second piercing structure 7021 is abutted to the second fixing groove 103, and the outer shell 7 is effectively prevented from being ejected when the fixing piece 702 is inserted into the jack of the main board.

As shown in fig. 3 to 5, as a preferred embodiment, a plastic retainer 8 is further provided at the holding portion of each row of contact terminals 3 by insert molding, so that the non-welding point of the holding portion of the contact terminals 3 can be wrapped and protected, so that each row of contact terminals 3 forms a whole, and the structural strength and stability of the connector are improved. And, the outer surface of the plastic retainer 8 is further provided with a buckling part 801 and a positioning lug 802 which are protruded outwards. Correspondingly, a bayonet 104 matched with the buckling part 801 is formed on the side wall of the first plastic body 1, the contact terminal 3 is buckled and mounted and fixed in the first plastic body 1 through the plastic retainer 8, and a positioning hole 503 matched with the positioning projection 802 is formed on the shielding plate 501 of the grounding strip 5, so as to ensure the welding precision of the grounding strip 5 and the grounding terminal 302.

The assembling process flow of the connector is as follows, firstly, the housing 7 is assembled into the plastic main body, then the arranged signal terminals 301 and the ground terminals 302 are molded into a whole by adopting an insert injection molding process, then the ground strip 5 and the ground terminals 302 are welded, the welded terminal assembly is clamped into the first plastic main body 1, the rear cover 6 is assembled, then the power terminal 4 is abutted into the second plastic main body 2, the assembled second plastic main body 2 is firstly installed on the main board, and finally the assembled first plastic main body 1 is installed on the main board for fixing.

In summary, the high-speed card edge connector provided by the utility model designs the reinforced shell and the fixing piece as the shell with an integrated structure, the concave fixing parts at two sides of the reinforced shell provide holding force for the plastic main body, so that the structural strength of the connector is improved, the transverse vibration and impact resistance of the connector is enhanced, the top of the reinforced shell is provided with the first piercing structure which is matched with the plastic main body to prevent the connector from shaking left and right, the high-frequency high-speed signal transmission quality and the performance reliability are improved, the fixing piece is externally protruded to form the second piercing structure which is abutted in the plastic main body, when the connector is welded on a main board, the shell is effectively prevented from being ejected out, the stability of the connector structure is enhanced, and the shell is formed by stamping, so that the manufacturing process is simple and the production is convenient.

The foregoing examples merely illustrate embodiments of the utility model and are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A high-speed edge connector, characterized in that,

include:

The plastic body includes a first plastic body (1) and a second plastic body (2) embedded in the first plastic body. The first plastic body (1) and the second plastic body (2) are respectively provided with a first slot (101) and a second slot (201). The first slot (101) and the second slot (201) are on the same straight line for the expansion card to be inserted.

The terminal group includes a plurality of contact terminals (3) disposed on both sides of the first slot (101) and power terminals (4) disposed on both sides of the second slot; each row of contact terminals (3) includes signal terminals (301) and ground terminals (302) arranged at intervals.

The grounding bar (5), located near the contact terminal (3), includes multiple shielding plates (501) covering the signal terminals (301) on the same side and connecting arms for correspondingly connecting to the grounding terminals (302) on the same side;

The back cover (6) is installed at the bottom of the first plastic body (1). The two long side walls of the back cover (6) are provided with welding grooves (601) for the protrusion of the contact terminal (3) and are formed with fixing positions for welding the contact terminal (3) to the high-speed cable.

The outer shell (7) is installed on the side of the first plastic body (1) and includes a reinforcing shell (701) disposed near the first slot (101) and a fixing piece (702) disposed at the bottom of the first plastic body (1).

2. A high-speed edge connector according to claim 1, characterized in that a first puncture structure (7011) is provided on the top of the reinforcing shell (701), a first fixing groove (102) adapted to the first puncture structure (7011) is provided on the first plastic body (1), and fixing portions (7012) are formed by recessing the two side walls of the reinforcing shell (701), and the fixing portions (7012) clamp the first plastic body (1).

3. A high-speed edge connector according to claim 1, characterized in that the fixing piece (702) protrudes outward from bottom to top to form a second piercing structure (7021), the first plastic body (1) is provided with a second fixing groove (103) adapted to the second piercing structure (7021), and the second piercing structure (7021) abuts against the second fixing groove (103); the outer shell (7) is an integrally formed structure.

4. A high-speed edge connector according to claim 1, characterized in that a plastic retainer (8) is formed at the retaining part of each row of contact terminals (3) by insert injection molding process, and the plastic retainer (8) is used to fix the signal terminal (301) and the ground terminal (302).

5. A high-speed edge connector according to claim 4, characterized in that the plastic retainer (8) is provided with a fastening part (801), and the side wall of the plastic body is provided with a bayonet (104) adapted to the fastening part (801).

6. A high-speed card edge connector according to claim 4, characterized in that the shielding plate (501) is provided with a positioning hole (503), and the plastic retainer (8) is also provided with a positioning protrusion (802) that cooperates with the positioning hole (503).

7. A high-speed edge connector according to claim 1, characterized in that the connecting arm includes two symmetrically arranged welding pieces (502), and the two welding pieces (502) are welded to the retaining part of the same grounding terminal (302).

8. A high-speed edge connector according to claim 1, characterized in that the fixed locking positions are uniformly arranged along the welding path between the contact terminal (3) and the high-speed cable, and each fixed locking position includes two mirror-symmetrically arranged locking arms (602), and a limiting locking groove is formed between the two locking arms (602).

9. A high-speed card edge connector according to any one of claims 1-8, characterized in that the first plastic body (1) is further provided with connecting seats (105) at both ends, and the connecting seats are provided with fixing holes.

10. A high-speed card edge connector according to any one of claims 1-8, characterized in that the bottom of the first plastic body (1) is further provided with a positioning post (106) for fixing the first plastic body (1) to the motherboard.