High-speed card edge connector

Abstract

The utility model discloses a high-speed card edge connector, which comprises a plastic main body, a terminal group and a grounding part, and is characterized in that the plastic main body is provided with a first slot and a second slot; the terminal group comprises a plurality of contact terminals arranged on the two sides of the first slot and power supply terminals arranged on the two sides of the second slot, and each row of contact terminals comprises signal terminals and grounding terminals which are arranged at intervals; the grounding part is arranged below the terminal group and comprises a grounding strip and a plastic combination part, and two sides of the grounding strip are provided with a plurality of connecting arms used for being correspondingly connected with the outer sides of the grounding terminals. The integrated grounding component is fixedly connected with the grounding terminal, so that the contact area is large, the contact resistance is effectively reduced, and electromagnetic interference is effectively prevented; the signal terminals are not easy to loosen and deform, long-term stable connection is realized, resonance between the signal terminals is reduced, and signal transmission quality and speed are improved; the complexity of the connector is reduced, rapid assembly can be realized, and detection is convenient; the novel grounding terminal is adopted, so that secondary connection can be realized, and the grounding process is reliable.

Description

Technical Field

[0001] This utility model relates to a connector, and more particularly to a high-speed card edge connector. Background Technology

[0002] Card edge connectors were primarily used for simple circuit board connections, such as connecting computer expansion cards to the motherboard. At that time, the connector structure was simple and performance requirements were relatively low. With the development of electronic technology, especially advancements in computer and communication technologies, higher demands have been placed on the performance, reliability, and miniaturization of card edge connectors. For example, in fields such as data centers and telecommunications equipment, connectors are required to support high-speed data transmission and high-density installation.

[0003] High-speed: As signal transmission rates continue to increase, such as up to 16Gt / s under the PCIe 4.0 specification and up to 32Gt / s under the PCIe 5.0 specification, card edge connectors need to have better high-frequency transmission performance to reduce signal distortion and attenuation.

[0004] Miniaturization and high density: Electronic devices are trending towards miniaturization and thinner designs, which requires card edge connectors to be smaller and have denser pin spacing, while ensuring good electrical and mechanical performance in order to integrate more functions within a limited space.

[0005] Enhanced reliability: In harsh industrial and automotive environments, card edge connectors need to have higher reliability and be able to withstand environmental factors such as vibration, shock, high temperature, and humidity to ensure connection stability and signal transmission accuracy.

[0006] Due to the need for miniaturization in edge connectors, the spacing between the terminals is constantly decreasing, which can easily lead to crosstalk between conductive terminals, thus affecting the signal transmission performance of the connector. Therefore, a grounding plate is installed inside the connector and connected to the grounding terminal among the conductive terminals to reduce the impact of electromagnetic interference or crosstalk on the connector.

[0007] Some existing technologies use split grounding plates, with at least four grounding plates connected to grounding terminals respectively. The grounding plates are connected by bayonet joints, and the connection between the grounding plates and the connector housing is also a bayonet joint. In actual production, the precision requirements for the bayonet joints are high. During manufacturing, the molds used need to be adjusted multiple times, making the processing technology complex and inconvenient for connector assembly, which is not conducive to industrial processing and production. Most importantly, the connection strength of the bayonet-connected grounding plates is also insufficient. If the engagement is insufficient, the clips can easily loosen due to deformation of the plastic components, resulting in unstable connections between the grounding plates, affecting the grounding circuit of the connector, and impacting the connector's electromagnetic interference protection performance. Furthermore, split grounding plates have a low fault tolerance rate, and poor contact can occur. When troubleshooting, there are many types of faults, making it difficult to diagnose and posing a challenge to product testing.

[0008] Another existing technology uses a grounding plate shape design suitable for flexible connection. The contact area of ​​the grounding plate connection is usually small, and the contact pressure may gradually decrease with the increase of time and number of uses, resulting in an increase in contact capacitance, affecting the grounding circuit and the electromagnetic interference shielding effect. In addition, the long-term stability of the grounding plate of the flexible connection is limited. The elastic element may experience fatigue and deformation during long-term use, thereby affecting the reliability of the connection and failing to meet the long-term stable grounding requirements of the card edge connector. Utility Model Content

[0009] To overcome the above shortcomings, this utility model provides a high-speed edge connector, which enables the connector grounding connection to achieve long-term stable connection, reliable manufacturing process, simple installation, convenient testing, and high fault tolerance, thereby effectively avoiding electromagnetic interference of the connector and truly promoting high-speed and high-quality data transmission.

[0010] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0011] A high-speed edge connector includes: a plastic body, a terminal group, and a grounding component. The plastic body includes a first plastic body and a second plastic body embedded within the first plastic body. The first plastic body and the second plastic body are respectively provided with a first slot and a second slot, which are on the same straight line for insertion into a second circuit board. The terminal group includes a plurality of contact terminals disposed on both sides of the first slot and power terminals disposed on both sides of the second slot. Each row of contact terminals includes signal terminals and ground terminals arranged at intervals. The grounding component is disposed below the terminal group and is an integral component including a grounding strip plastic joint. A plurality of connecting arms for corresponding connection to the outer side of the grounding terminals are distributed on both sides of the grounding strip.

[0012] As a further improvement of this utility model, the contact terminal includes a retaining part located inside the first slot, a lead extending out of the bottom of the first plastic body, a terminal body extending into the first slot, and an elastic contact part disposed at the end of the terminal body.

[0013] As a further improvement of this utility model, the grounding bar includes a grounding body and a plurality of connecting arms. The connecting arms extend from a left side and a right side of the grounding body in a horizontal and vertical direction, respectively. The inner side of the connecting arm in the vertical direction is a first contact surface, and the outer side of the connecting arm in the vertical direction is a second contact surface. The first contact surface is fixedly connected to the outer side of the grounding terminal pin.

[0014] As a further improvement of this utility model, the bent leg is approximately "L" or "Z" shaped, including an unbent leg platform and a bent leg platform, wherein the bent leg platform is parallel to the first contact surface and the two are fixedly connected by welding.

[0015] As a further improvement of this utility model, the height difference between the bent-leg platform and the unbent-leg platform is equal to the thickness of the connecting arm. After the grounding terminal pin is welded to the connecting arm, the unbent-leg platform and the second contact surface are on the same plane, and both are welded to the same wire, thereby realizing secondary welding of the grounding terminal and forming a reliable grounding circuit.

[0016] As a further improvement of this utility model, the plastic joint is embedded in the grounding body, and the plastic joint has a connecting protrusion on the side near the grounding terminal for assembling the grounding component, and the connecting arm extends from both sides of the plastic joint.

[0017] As a further improvement of this utility model, the grounding body is a rectangle with thickness, the width of which does not exceed the cross-sectional thickness including the contact terminals on both sides, and the length is not less than the lateral arrangement width of the contact terminals on both sides.

[0018] As a further improvement of this utility model, it also includes a back cover, which is installed on the bottom of the first plastic body. The back cover has two rows of through holes for the contact terminal pins to extend out, a concave surface for the pin bending platform, and a groove near the grounding component. The groove is matched and connected to the connecting protrusion.

[0019] As a further improvement of this utility model, each row of contact terminals has a plastic block installed at its holding part using an insert injection molding process. The plastic block also has a fastening part, and the side wall of the plastic body is provided with a snap-fit ​​that cooperates with the fastening part.

[0020] As a further improvement of this utility model, the first plastic body is also provided with connecting seats at both ends, and the bottom of the first plastic body is also provided with positioning posts and fixing pieces for accurately fixing the first plastic body to the first circuit board.

[0021] Compared with the prior art, the advantages of this high-speed edge connector provided by this utility model are as follows: This utility model forms a larger contact area by fixing the integrated grounding component and the grounding terminal separately, thereby effectively reducing contact resistance, improving grounding conductivity, ensuring good electrical connection, and effectively preventing electromagnetic interference; moreover, the connection is not easy to loosen or deform, realizing long-term stable connection of the edge connector, effectively reducing resonance between the two pairs of differential signal terminals, and improving signal transmission quality and transmission rate; at the same time, it also reduces the complexity of the edge connector structure, making the edge connector quick to assemble and easier to test; in addition, by using grounding terminals that are roughly "L" or "Z" shaped, secondary welding of the grounding terminals is achieved, making the grounding circuit more reliable. Attached Figure Description

[0022] Figure 1 This is an exploded perspective view of a high-speed edge connector according to the present invention.

[0023] Figure 2 This is a schematic diagram of the grounding terminal structure of a high-speed edge connector according to the present invention;

[0024] Figure 3 This is a schematic diagram of the grounding component structure of a high-speed edge connector according to the present invention;

[0025] Figure 4 This is a perspective view of the grounding terminal and grounding component connection of a high-speed edge connector according to the present invention;

[0026] Figure 5 This is a partial schematic diagram of the rear groove structure of a high-speed edge connector according to the present invention;

[0027] Figure 6 This is a cross-sectional view of a high-speed card edge connector according to the present invention;

[0028] Figure 7 This is a partially enlarged schematic diagram of the grounding terminal and grounding component of a high-speed edge connector according to this utility model;

[0029] Figure 8 This is a partial schematic diagram showing the connection between the grounding terminal and grounding component of a high-speed edge connector of this utility model and the wire;

[0030] Figure 9 This is a schematic diagram illustrating the working state of a high-speed card edge connector according to the present invention;

[0031] The components represented by each number in the attached diagram are explained below:

[0032] 1-First plastic body, 101-First slot, 102-Connector, 103-Positioning post, 104-Fixing piece, 105-Bayonet, 2-Second plastic body, 201-Second slot, 3-Contact terminal, 301-Signal terminal 302-Grounding terminal, 3021-Holding part, 3022-Pin, 3022a-Pin unbent platform, 3022b-Pin bent platform, 3023-Terminal body, 3024-Contact part, 4-Power terminal, 5-Grounding component, 501-Grounding strip, 5011-Grounding body, 5012-Connecting arm, 5012a-First contact surface, 5012b-Second contact surface, 502-Plastic joint, 5021-Connecting protrusion, 6-Back cover, 601-Through hole, 602-Concave surface, 603-Groove, 7-Plastic block, 701-Snap-fit ​​part, 8-First circuit board, 9-Second circuit board, 10 Wire

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Detailed Implementation

[0035] This utility model embodiment provides a high-speed edge connector, including a plastic body, a terminal group, a grounding component 5, a plastic block 7, and a rear cover 6, specifically:

[0036] Figure 1 and Figure 9These are an exploded view and a working schematic diagram of a high-speed edge connector according to this utility model. The connector's frame is based on a plastic body. The first plastic body 1 and the second plastic body 2 embedded inside it can provide better support and guidance. 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 second circuit board 9 to be inserted. The first plastic body 1 has connecting seats 102 at both ends. The connecting seats 102 have fixing holes. Correspondingly, the first circuit board 8 has mounting holes that cooperate with the fixing holes. The first plastic body 1 is installed on the first circuit board 8 by bolts and nuts. Furthermore, in order to improve the installation accuracy of the first plastic body 1, the bottom of the first plastic body 1 is also provided with a positioning post 103 and a fixing piece 104. The positioning post 103 serves as a positioning reference and can assist the assembly personnel in quickly aligning the first plastic body 1 with the first circuit board 8. Then, the fixing piece 104 is inserted into the corresponding hole of the first circuit board 8 and welded to fix it, so that the first plastic body 1 can be accurately fixed on the first circuit board 8.

[0037] The terminal group includes a plurality of contact terminals 3 and a plurality of power terminals 4. The power terminals are disposed in the mounting slots on both sides of the second slot 201, and the contact terminals 3 are disposed in the terminal mounting slots on both sides of the first slot 101. The contact terminals 3 on both sides include a plurality of signal terminals 301 and ground terminals 302 arranged at intervals. The contact terminals 3 include a retaining part, a lead, a terminal body, and a resilient contact part (see attached diagram). Figure 2 The grounding terminal 302 includes a retaining portion 3021, a pin 3022, a terminal body 3023, and a contact portion 3024.

[0038] Furthermore, all contact terminals 3 are integrally formed. The retaining part of the contact terminal 3 is snapped into the terminal mounting groove of the first plastic body 1 to fix the entire contact terminal 3. The lead is located below the retaining part and extends downward, protruding outside the bottom of the first plastic body 1. The terminal body is located above the retaining part and extends into the first slot 101. The elastic contact part is located at the end of the terminal body for contacting and conducting with the second circuit board 9.

[0039] Figure 3Further explanation: The grounding bar 501 includes a grounding body 5011 and a plurality of connecting arms 5012. Each connecting arm 5012 extends from one left and one right side of the grounding body 5011 in at least two dimensions, forming a contact surface and at least one bend. Optionally, the connecting arms 5012 extend sequentially from both sides of the grounding body 5011 in a horizontal and vertical direction. The inner vertical side of the connecting arm 5012 is a first contact surface 5012a, and the outer vertical side of the connecting arm 5012 is a second contact surface 5012b. The first contact surface is fixedly connected to the outer side of the grounding terminal pin by welding. Figure 4 This provides a clearer and more intuitive reflection of the overall effect after the grounding terminal and grounding component are connected.

[0040] Furthermore, the grounding body 501 is a rectangle with thickness, the width of which does not exceed the thickness of the cross-section including the contact terminals 3 on both sides, and the length is not less than the lateral width of the contact terminals 3 on both sides. Moreover, the plastic joint 502 covers the grounding body 5011, and a connecting protrusion 5021 is provided on the side near the grounding terminal for subsequent assembly of the grounding component 5.

[0041] Because the grounding component 5 is an integral unit, it achieves a simple, compact, and robust overall structure, and also ensures an efficient and stable electrical connection with the grounding terminal 302; moreover, the welding joints facilitate fault detection, are easy to assemble, and are suitable for large-scale industrial production.

[0042] Figure 2 To further explain, the joint 3022 is formed by riveting and is approximately "L" or "Z" shaped. After riveting, the joint forms a joint bending platform 3022b. Correspondingly, the unbent part of the joint has a joint unbent platform 3022a. The joint bending platform 3022b matches the contact surface of the connecting arm 5012 used for welding. The difference in height between the upper surface of the joint bending platform 3022b and the upper surface of the joint unbent platform 3022a is equal to the thickness of the connecting arm 5012.

[0043] And, as Figures 6-8As shown, after the pin 3022 is connected to the connecting arm 5012, the upper plane of the unbent portion of the pin 3022b near the grounding terminal holding part 3021 is on the same plane as the upper plane corresponding to the welding surface of the connecting arm. This results in a cleaner and more complete component after welding, facilitating subsequent connection of the wire 10. Furthermore, to achieve better welding results, the length and width of the platform portion 3022b of the pin are at least equal to the length and width of the welding plane on the connecting arm 5012. This allows the pin 302 and the grounding component connecting arm 5012 to be welded to the same wire 10, achieving secondary welding of the grounding terminal 302. This strengthens the connection stability between the grounding terminal 302 and the grounding component 5, reducing the possibility of loosening or poor contact caused by external factors. This makes the connector grounding circuit process reliable and has a higher fault tolerance rate. Moreover, since the grounding terminal 302 is directly welded to the grounding component 5, a larger contact area is formed, effectively reducing contact resistance, improving grounding conductivity, ensuring good electrical connection, and effectively preventing electromagnetic interference.

[0044] To further explain, such as Figure 5 As shown, the back cover 6 is installed at the bottom of the first plastic body (1). The back cover 6 has two rows of through holes 601 for the prongs of the contact terminal 3 to extend out, a concave surface 602 for the prong bending part 3022a to be placed, and a groove 603 provided near the grounding component. The grounding component connecting protrusion 5012 can be embedded in the groove 603 to further fix the grounding component 5.

[0045] In addition, such as Figure 1 As shown, each row of contact terminals 3 has a plastic block 7 installed at its holding part using a single injection molding process. The plastic block 7 also has a fastening part 701. The side wall of the plastic body is also provided with a snap-fit ​​105 that cooperates with the fastening part 701. The contact terminals 3 and the plastic body 1 are fixed by the plastic block.

[0046] In addition, after the grounding component 5, grounding terminal 302, and wire 10 are welded together, they are formed into the back plug body of the card edge connector through an insert molding process, which is used to protect the welding point and enhance the stability of the connection.

[0047] Figure 9When the connector is in operation, the second circuit board 9 is inserted along the first slot 101 and the second slot 201, and its contacts precisely mate with the contact terminals 3 to form the required electrical connection. The signal terminal 301 handles data transmission, the power terminal 4 provides power, and the ground terminal 302 can be connected to the grounding component 5 via the connecting arm 5012 or to the wire 10, forming a complete and reliable grounding loop. This design not only ensures high-speed and stable data transmission but also improves electromagnetic compatibility through an effective grounding system, protecting the connector from external interference and damage. The entire connector is compact, easy to install, and suitable for electronic devices requiring high-reliability and high-performance electrical connections.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "flat", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] The above embodiments are preferred embodiments of this utility model, but not all embodiments. Any equivalent changes to the technical solutions of this utility model made by those skilled in the art after reading this utility model specification are covered by the claims of this utility model.

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 (1). 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 second circuit board (9) 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 (201); each row of contact terminals (3) includes signal terminals (301) and ground terminals (302) arranged at intervals. The grounding component (5) is located below the terminal group and is an integrated component including a grounding bar (501) and a plastic joint (502). Multiple connecting arms (5012) are distributed on both sides of the grounding bar (501) for corresponding connection to the outside of the grounding terminal (302).

2. A high-speed edge connector according to claim 1, characterized in that: The contact terminal (3) includes a retaining part located inside the first slot (101), a lead extending out of the bottom of the first plastic body (1), a terminal body extending into the first slot (101), and an elastic contact part disposed at the end of the terminal body.

3. A high-speed edge connector according to claim 2, characterized in that: The grounding bar (501) includes a grounding body (5011) and a plurality of connecting arms (5012). The connecting arms (5012) extend from the left and right sides of the grounding body (5011) in a horizontal and vertical direction respectively. The inner side of the connecting arm (5012) in the vertical direction is a first contact surface (5012a), and the outer side of the connecting arm (5012) in the vertical direction is a second contact surface (5012b). The first contact surface (5012a) is fixedly connected to the outer side of the grounding terminal (302) pin.

4. A high-speed edge connector according to claim 3, characterized in that: The grounding terminal (302) has its pins bent into an approximate "L" or "Z" shape, including an unbent pin platform (3022a) and a bent pin platform (3022b). The bent pin platform (3022b) is parallel to the first contact surface (5012a), and the two are fixedly connected by welding.

5. A high-speed edge connector according to claim 4, characterized in that: The difference in height between the bent-leg platform (3022b) and the unbent-leg platform (3022a) is the thickness of the connecting arm (5012). After the grounding terminal (302) is welded to the connecting arm (5012), the unbent-leg platform (3022a) and the second contact surface (5012b) are on the same plane, and both are welded to the same conductor (10).

6. A high-speed edge connector according to claim 3, characterized in that: The plastic joint (502) is embedded in the grounding body (5011). The plastic joint (502) has a connecting protrusion (5021) on the side near the contact terminal (3). The connecting arm (5012) extends from both sides of the plastic joint (502).

7. A high-speed edge connector according to claim 3, characterized in that: The grounding body (5011) is a rectangle with thickness, the width of which does not exceed the cross-sectional thickness of the contact terminals (3) on both sides, and the length is not less than the lateral width of the contact terminals (3) on both sides.

8. A high-speed edge connector according to claim 5, characterized in that: It also includes a back cover (6), which is installed on the bottom of the first plastic body (1). The back cover (6) has two rows of through holes (601) for the contact terminal (3) pins to extend out, a concave surface (602) for the pin bending platform (3022b) to be placed, and a groove (603) is provided on the side of the back cover (6) near the grounding component (5). The groove (603) is matched and connected with the connecting protrusion (5021).

9. A high-speed edge connector according to any one of claims 2-8, characterized in that: Each row of contact terminals (3) has a plastic block (7) installed at its holding part using an insert injection molding process. The plastic block (7) also has a fastening part (701), and the side wall of the plastic body is also provided with a latch (105) that cooperates with the fastening part (701).

10. A high-speed edge connector according to any one of claims 1-8, characterized in that: The first plastic body (1) is also provided with connecting seats (102) at both ends, and the bottom of the first plastic body (1) is also provided with positioning posts (103) and fixing pieces (104) for fixing the first plastic body (1) to the first circuit board (8).

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