High-speed card edge connector

Abstract

The utility model discloses a high-speed card edge connector, which comprises a plastic cement main body, a terminal group, a grounding strip, a rear cover and a shell, and is characterized in that the plastic cement main body comprises a first plastic cement main body and a second plastic cement main body, and the first plastic cement main body and the second plastic cement main body are respectively 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; the grounding strip comprises a plurality of shielding plates and connecting arms; the rear cover is installed at the bottom of the first plastic main body, welding grooves are formed in the side walls of the two long edges of the rear cover, and a plurality of fixing clamping positions are formed; the shell comprises a reinforcing shell arranged close to the first slot and a fixing sheet arranged at the bottom of the first plastic main body; according to the integrated shell structure, the transverse vibration and impact resistance of the connector is enhanced, the performance reliability of the connector and the stability of signal transmission are improved, and the shell is formed through stamping, so that the manufacturing process is simple, and the production is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric connector, especially a kind of high-speed card edge connector. BACKGROUND

[0002] In the field of modern electronic engineering, card edge connector is a key component to realize the fast and efficient electrical connection between the edge of printed circuit board and external devices. The structural feature of this connector is that its terminals are arranged along the edge of the circuit board, so that the connector can be directly connected with the conductive path of the circuit board, thereby reducing the space required for connection and simplifying the assembly process. Card edge connector is widely used to connect expansion cards and mainboards inside electronic devices. These expansion cards may include high-performance components such as graphics processing units, network cards, and storage controller cards. Through PCIe interface, these expansion cards can achieve high-speed data transmission, meeting the demand of modern computer systems for large bandwidth and low latency. In addition, card edge connector is also widely used in data centers, servers and industrial automation fields to connect various high-speed interface devices.

[0003] The structure of card edge connector mainly includes an insulating body and a series of closely arranged conductive terminals housed in the insulating body. The insulating body usually has two side walls arranged oppositely, forming a central slot for accommodating and guiding the edge of the expansion card to be inserted. The insulating body in the prior art is generally a long strip-shaped plastic body. This structure has poor performance in resisting lateral vibration impact, especially when the expansion card has a certain load weight after being inserted. Cracking phenomenon is particularly prominent, which seriously affects the stability and reliability of high-frequency high-speed signal transmission of card edge connector. With the rapid development of 5G electronic industry, computers increasingly need card edge connectors with high-strength structure. Therefore, it is necessary to provide a card edge connector with improved structure to overcome the above-mentioned defects. SUMMARY

[0004] The purpose of the utility model is to design a high-speed card edge connector to solve the problems of the prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] Provided is a high-speed card edge connector, comprising a plastic main body, a terminal group, a grounding strip, a rear cover and a shell, the plastic main body comprises a first plastic main body and a second plastic main body embedded in the first 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 first slot and the second slot are on the same straight line for expansion card insertion; the terminal group comprises a plurality of contact terminals arranged on both sides of the first slot and power terminals arranged on both sides of the second slot; each row of contact terminals comprises signal terminals and ground terminals arranged at intervals; the grounding strip is arranged close to the contact terminals and comprises a plurality of shielding plates covering the signal terminals on the same side and connecting arms for connecting with the ground terminals on the same side one by one; the rear cover is mounted on the bottom of the first plastic main body, the two long side walls of the rear cover are provided with welding grooves for the pins of the contact terminals to extend out, and are formed with fixed clamping positions for welding the contact terminals with high-speed cables; the shell is mounted on the side of the first plastic main body and comprises a reinforcing shell arranged adjacent to the first slot and a fixing plate arranged on the bottom of the first plastic main body.

[0007] Further, the reinforcing shell is provided with a first piercing structure on the top, the first plastic main body is provided with a first fixed groove matched with the first piercing structure, and the two side walls of the reinforcing shell are recessed to form fixed parts, which clamp the first plastic main body.

[0008] Further, the fixing plate is outwardly convex from bottom to top to form a second piercing structure, the first plastic main body is provided with a second fixed groove matched with the second piercing structure, and the second piercing structure abuts in the second fixed groove; the shell is an integral molding structure.

[0009] Further, the holding part of each row of contact terminals is formed with a plastic retaining piece by insert injection molding process, which is used to fix the signal terminals and the ground terminals.

[0010] Further, the plastic retaining piece 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.

[0011] Further, the shielding plate is provided with a positioning hole, and the plastic retaining piece is further provided with a positioning protrusion matched with the positioning hole.

[0012] Further, the connecting arm comprises two symmetrically arranged welding pieces, and the two welding pieces are welded on the holding part of the same ground terminal.

[0013] Further, the fixed clamping position is uniformly arranged along the welding path of the contact terminals and high-speed cables, each fixed clamping position comprises two mirror-symmetrically arranged clamping arms, and a clamping groove is formed between the two clamping arms.

[0014] Further, the first plastic body is provided with a connecting seat at both ends, and the connecting seat is provided with a fixing hole.

[0015] Further, the first plastic body is provided with a positioning column at the bottom, which is used for fixing the first plastic body on a mainboard.

[0016] The utility model discloses a high -speed card edge connector, through design one -piece structure's shell, the shell includes reinforcing shell and fixed sheet, and the fixed sheet is provided with the first puncture structure at the top, and the first puncture structure is adapted with the plastic body, prevents the left and right shaking of connector, strengthens the stability of signal transmission, improves high -frequency high -speed signal transmission quality and performance reliability, and the reinforcing shell is provided with the second puncture structure that protrudes outward, and the second puncture structure is abutted in the plastic body, when the connector is welded in the mainboard, effectively prevent the shell from being pushed out, and the stability of connector structure is strengthened. BRIEF DESCRIPTION OF DRAWINGS

[0017] The following description of the drawings is merely some embodiments, and other drawings can be obtained according to the drawings by those skilled in the art without creative labor. In the drawings:

[0018] Figure 1 The utility model provides a kind of overall structure schematic diagram of high-speed card edge connector for the embodiment of the utility model;

[0019] Figure 2 Another overall structure schematic diagram of high-speed card edge connector for the embodiment of the utility model is provided

[0020] Figure 3 The utility model provides a kind of high-speed card edge connector of explosion drawing for the embodiment of the utility model;

[0021] Figure 4 The utility model provides a kind of internal structure schematic diagram of high-speed card edge connector for the embodiment of the utility model;

[0022] Figure 5 The utility model provides a kind of high-speed card edge connector in the embodiment of the utility model, and the fixing mode of contact terminal is partially enlarged schematic diagram;

[0023] Figure 6 The utility model provides a kind of high-speed card edge connector for the embodiment of the utility model, and the sectional view is provided;

[0024] Figure 7A structure schematic view of the grounding strip in the high-speed card edge connector is provided for the embodiment of the utility model.

[0025] Figure 8 A structure schematic view of the first plastic main body in the high-speed card edge connector is provided for the embodiment of the utility model.

[0026] Figure 9 A structure schematic view of the shell in the high-speed card edge connector is provided for the embodiment of the utility model.

[0027] Figure 10 A structure schematic view of the signal terminal in the high-speed card edge connector is provided for the embodiment of the utility model.

[0028] Figure 11 A structure schematic view of the grounding terminal in the high-speed card edge connector is provided for the embodiment of the utility model.

[0029] In the drawings, the component list represented by each sign is as follows:

[0030] The first plastic main body-1, the first slot-101, the first fixed groove-102, the second fixed groove-103, the bayonet-104, the connecting seat-105, the positioning column-106, the second plastic main body-2, the second slot-201, the contact terminal-3, the signal terminal-301, the first holding part-3011, the first pin-3012, the first terminal body-3013, the first contact part-3014, the grounding terminal-302, the second holding part-3021, the second pin-3022, the second terminal body-3023, the second contact part-3024, the power terminal-4, the grounding strip-5, the shielding plate-501, the welding sheet-502, the positioning hole-503, the back cover-6, the welding groove-601, the clamping arm-602, the shell-7, the reinforcing shell-701, the first piercing structure-7011, the fixed part-7012, the fixed sheet-702, the second piercing structure-7021, the plastic retaining piece-8, the buckling part-801, the positioning block-802. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, instead of all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] 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 back cover and a shell.

[0033] As Figures 1 to 3 shown in the embodiment, the plastic body serves as the mounting base of the whole connector, including 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 in the same straight line for expansion card insertion; the first plastic body 1 is provided with a connecting seat 105 at both ends, the connecting seat 105 is provided with a fixing hole, and the mainboard is provided with a mounting hole corresponding to the fixing hole, and the first plastic body 1 is mounted on the mainboard by bolts and nuts. Further, in order to improve the installation accuracy of the first plastic body 1, the first plastic body 1 is further provided with a positioning column 106 and a fixing sheet 702 at the bottom, the positioning column 106 serves as a positioning reference, which can assist the assembler to quickly align the first plastic body 1 with the mainboard, then insert the fixing sheet 702 into the corresponding hole of the mainboard and weld it, so as to accurately fix the first plastic body 1 on the mainboard.

[0034] The terminal group includes a plurality of contact terminals 3 and a plurality of power terminals 4, the power terminals 4 are arranged in the terminal mounting slot on both sides of the second slot 201, for supplying power to the expansion card; the contact terminals 3 are arranged in the terminal mounting slot on both sides of the first slot 101, 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 terminals 3 include a holding part, a pin, a terminal body and an elastic contact part (for reference Figure 10 and Figure 11 , the signal terminal 301 includes a first holding part 3011, a first pin 3012, a first terminal body 3013 and a first contact part 3014; the ground terminal 302 includes a second holding part 3021, a second pin 3022, a second terminal body 3023 and a second contact part 3024). The contact terminals 3 are integrally formed, the holding part of the contact terminals 3 is clamped in the terminal mounting slot of the first plastic body 1 to fix the whole contact terminals 3; the pin is arranged below the holding part and extends downward, exposed outside the bottom of the first plastic body 1, the terminal body is arranged above the holding part and extends into the first slot 101, and the elastic contact part is arranged at the end of the terminal body for contact with the expansion card.

[0035] As Figures 3 to 7As shown, the grounding bar 5 is disposed on the front side of the contact terminal 3 (i.e., the side opposite to the elastic contact portion of the contact terminal 3), and includes multiple shielding plates 501 and connecting arms for corresponding connection to the grounding terminals 302 on the same side. The length of the shielding plate 501 is not less than the outer edge 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, thereby blocking and absorbing electromagnetic waves and reducing the influence of external electromagnetic interference on the signal. The connecting arm includes two welding pieces 502 arranged symmetrically on top of each other, and the two welding pieces 502 are welded to the holding portion of the same grounding terminal 302. By electrically connecting multiple grounding terminals 302 through the grounding bar 5, a more stable and uniform reference plane can be formed, thereby effectively reducing the resonance between differential signal terminals and improving the signal integrity during high-frequency and high-speed signal transmission. Of course, the grounding bar 5 can also be set on the back of the contact terminal 3, which has a better anti-resonance effect, can more effectively reduce mutual interference between signals inside the connector, and improve the high-frequency performance of the connector.

[0036] like Figures 4 to 6 As shown, in this embodiment, the back cover 6 is press-fitted to the bottom of the first plastic body 1, which can protect the contact points inside the connector, reduce the impact of external environmental factors such as dust and moisture, and extend the service life of the connector. A row of welding grooves 601 is also formed on each of the two long sidewalls of the back cover 6, allowing the pins of the contact terminals 3 to extend and be welded to the high-speed cable. Multiple fixing slots for limiting the solder wire are also formed on the outer surface of the back cover 6. These fixing slots are evenly spaced along the welding path between the contact terminals 3 and the high-speed cable. Each fixing slot includes two mirror-symmetrically arranged locking arms 602, with the distance between the two locking arms 602 slightly larger than the outer diameter of the solder wire, thus forming a slot that can hold and fix the soft solder wire.

[0037] like Figures 6 to 9As shown, the shell 7 is assembled on the side of the first plastic body 1, including a reinforcing shell 701 arranged adjacent to the first slot 101 and a fixing sheet 702 arranged on the bottom of the first plastic body 1, and the shell 7 is an integral structure, which is simple in punching process and has higher reliability and is convenient for production. Further, the reinforcing shell 701 is provided with a first piercing structure 7011 on the top, and the first plastic body 1 is provided with a first fixing groove 102 matched with the first piercing structure 7011. In this embodiment, the first piercing structure 7011 is provided with two, which cooperates with the first plastic body 1 to reinforce the plastic body and prevent shaking left and right. The two side walls of the reinforcing shell 701 are concave to form a fixing part 7012, which clamps the first plastic body 1, improves the structural strength of the connector, enhances the transverse anti-vibration impact performance of the connector, and improves the performance reliability and signal transmission stability of the connector. The fixing sheet 702 is convex to form a second piercing structure 7021 from bottom to top, and the first plastic body 1 is provided with a second fixing groove 103 matched with the second piercing structure 7021. The second piercing structure 7021 is abutted in the second fixing groove 103, which effectively prevents the shell 7 from being pushed out when the fixing sheet 702 is inserted into the jack of the mainboard.

[0038] As shown in the drawings, Figures 3 to 5 As a preferred embodiment, a plastic retaining piece 8 is arranged at the holding part of each row of contact terminals 3 by insert injection molding process, which can wrap and protect the non-welding point of the holding part of the contact terminal 3, so that each row of contact terminals 3 forms a whole, improving the structural strength and stability of the connector. Further, the outer surface of the plastic retaining piece 8 is provided with an outwardly protruding buckling part 801 and a positioning protrusion 802. Correspondingly, the sidewall of the first plastic body 1 is provided with a bayonet 104 matched with the buckling part 801, the contact terminal 3 is buckled and fixed in the first plastic body 1 through the plastic retaining piece 8, and the shielding plate 501 of the grounding strip 5 is provided with a positioning hole 503 matched with the positioning protrusion 802 to ensure the welding precision of the grounding strip 5 and the grounding terminal 302.

[0039] The assembly process of the connector is as follows: first, assemble the shell 7 into the plastic body, then arrange the signal terminals 301 and the grounding terminals 302 in an insert injection molding process to form a whole, then weld the grounding strip 5 and the plurality of grounding terminals 302, clamp the welded terminal assembly into the first plastic body 1, then assemble the rear cover 6, then abut the power terminal 4 in the second plastic body 2, and then install the assembled second plastic body 2 on the mainboard, and finally install the assembled first plastic body 1 on the mainboard.

[0040] In summary, the utility model provides a kind of high-speed card edge connector, reinforced shell and fixed sheet are designed as the shell of integrated structure, the fixed part of the inside concave of reinforced shell both sides provides the holding force of plastic main body, improves the structural strength of connector, enhances the transverse anti-vibration impact performance of connector;Reinforced shell top is equipped with first puncture structure, with plastic main body adaptation, prevent connector left and right shaking, improve high-frequency high-speed signal transmission quality and performance reliability;Fixed sheet is formed as the second puncture structure outside convex, abuts in plastic main body, when connector is welded in mainboard, effectively prevent shell from being pushed out, enhance the stability of connector structure, and shell is formed by stamping, and process is simple, and it is convenient for production.

[0041] The above-described embodiments only express the implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to 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. The high-speed card edge connector according to claim 1, characterized in that, The top of the reinforced shell (701) is provided with a first puncture structure (7011), and the first plastic body (1) is provided with a first fixing groove (102) that is adapted to the first puncture structure (7011). The two side walls of the reinforced shell (701) are recessed to form fixing parts (7012), and the fixing parts (7012) clamp the first plastic body (1).

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

4. A high-speed card edge connector according to claim 1, characterized in that, Each row of contact terminals (3) has a plastic retainer (8) formed by insert injection molding at its holding part. 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 snap-fit ​​(104) that is compatible with the fastening part (801).

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

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

9. 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 (105) at both ends, and the connecting seats are provided with fixing holes.

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

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