Board-to-board connector

Abstract

The utility model discloses a board-to-board connector, which comprises an insulating base, a socket terminal, a middle island protection sheet and an end wall protection sheet, and is characterized in that the socket terminal is mounted in a mounting groove between a long edge structure and a middle island structure in the insulating base; the middle island protection sheet comprises a cap part, a connecting and fixing part and a middle island welding leg; the end wall protection sheet comprises an end part covering part and a side part covering part; wherein a first weld leg is arranged below the side covering part, a second weld leg is arranged below the junction of the end covering part and the side covering part, and the second weld leg and the middle island weld leg which are located on the same side of the insulating base share one PCB bonding pad. According to the utility model, while the installation efficiency of the board-to-board connector is ensured, the external force borne by the end wall protection sheet in the plugging process is effectively dispersed, the end wall protection sheet is prevented from buckling deformation in the use process, the stability and reliability of components are improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical connectors, and in particular relates to a board-to-board connector. Background Art

[0002] Board to Board electrical connector is a commonly used connection element in electronic products, which is used to establish an electrical connection between two circuit boards. Its basic structure consists of two parts: a socket and a plug. The socket is usually welded on one circuit board, while the plug is welded on another circuit board. The socket and the plug have a corresponding number of pins for transmitting electronic signals and power. By plugging the socket and the plug, the communication connection between the two circuit boards can be achieved.

[0003] However, existing board-to-board connectors still have some problems during use. Fig.10 As shown, a socket connector and connector assembly with announcement number CN219843174U includes an insulating base, a center island structure and conductive terminals installed in the insulating base, center island protection sheets covering the two ends of the center island structure, and end wall protection sheets covering the upper sides of the two short side structures of the insulating base. Due to the irregular shape of the end wall protection sheet and the uneven fixing points, the end wall protection sheet only has two symmetrical welding feet on the side. When plugging and unplugging the connector, the metal protection sheet is often subjected to uneven force. This uneven force can cause unnecessary deformation of the components and loosening or damage of the connection parts. This problem is particularly prominent after the connector has been plugged and unplugged many times, which can easily cause the metal protection sheet to deform and warp, or even cause the solder joints to fall off. This situation seriously affects the reliability and stability of the board-to-board connector.

[0004] Therefore, it is necessary to improve the existing connector socket to further ensure the stability of the electrical performance of the connector and extend the service life of the connector. Utility Model Content

[0005] The utility model aims to provide a board-to-board connector to solve the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A board-to-board connector, comprising an insulating base, a socket terminal, a center island protection sheet and an end wall protection sheet, the insulating base comprising a pair of relatively arranged long side structures, a pair of relatively arranged short side structures and a center island structure; the socket terminal is installed in a mounting groove between the long side structure and the center island structure; the center island protection sheet comprises a cap portion covering the end of the center island structure, a connecting and fixing portion arranged on the bottom plate of the insulating base, an elastic contact portion arranged on both sides of the connecting and fixing portion and extending upward, and a center island welding foot arranged on both sides of the connecting and fixing portion and extending in the direction of the long side structure; the end wall protection sheet comprises an end covering portion covering the upper sides of the two short side structures of the insulating base, and a side covering portion partially covering the upper sides of the two long side structures of the insulating base; a first welding foot is provided below the side covering portion, and a second welding foot is provided below the junction of the end covering portion and the side covering portion.

[0008] Furthermore, the second solder pin and the island solder pin located on the same side of the insulating base share a PCB soldering pad.

[0009] Furthermore, a chamfer is provided on the inner side of the second solder leg near the center island solder leg to facilitate soldering of the second solder leg and the center island solder leg.

[0010] Furthermore, the connection and fixing portion of the center island protection sheet is bent downward with a certain arc, so that the center island welding foot can pass through the bottom plate of the insulating base and be exposed outside the insulating base.

[0011] Furthermore, the first welding leg is also provided with an undercut for improving the bonding force between the end wall protection sheet and the insulating base.

[0012] Furthermore, an arc-shaped protrusion facing the island structure is also provided on the side wall of the end covering portion.

[0013] Furthermore, the center island protection sheet and the end wall protection sheet are both made of metal material.

[0014] Compared with the prior art, the board-to-board connector provided by the present invention has the following beneficial technical effects:

[0015] The utility model evenly arranges a plurality of welding feet on the end wall protection sheet according to the stress conditions of the connector during the plugging and unplugging process, and arranges some welding feet and the center island welding feet on the same welding pad. While ensuring the installation efficiency of the board-to-board connector, it also effectively disperses the external force borne by the end wall protection sheet during the plugging and unplugging process, prevents the end wall protection sheet from warping and deformation during use, improves the stability and reliability of the component, and extends the service life.

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 A schematic structural diagram of a board-to-board connector provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the bottom structure of a board-to-board connector provided in an embodiment of the utility model;

[0020] Figure 3 An exploded view of a board-to-board connector provided by an embodiment of the utility model;

[0021] Figure 4 A cross-sectional view of a board-to-board connector provided by an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of the structure of an island protection sheet in a board-to-board connector provided by an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the structure of an end wall protection sheet in a board-to-board connector provided by an embodiment of the utility model;

[0024] Figure 7 A schematic diagram of the connection relationship between an end wall protection sheet and a PCB pad in a board-to-board connector provided by an embodiment of the utility model;

[0025] Figure 8 A schematic diagram of the structure of a receptacle connector and a plug connector before being plugged into each other in a board-to-board connector provided by an embodiment of the utility model;

[0026] Fig. 9 A schematic diagram of the structure of a socket connector and a plug connector in a board-to-board connector provided by an embodiment of the utility model after being plugged in;

[0027] Fig.10 It is a structural schematic diagram of the prior art.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1-insulating base, 101-long side structure, 102-short side structure, 103-center island structure, 104-matching slot, 105-installing slot, 2-socket terminal, 3-center island protection sheet, 301-cap part, 302-connection fixing part, 303-elastic contact part, 304-center island welding foot, 4-end wall protection sheet, 401-end covering part, 402-side covering part, 403-first welding foot, 404-second welding foot, 405-chamfer, 406-arc-shaped protrusion, 407-undercut, 5-PCB pad, 6-plug connector, 601-snap-fit ​​mouth. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The embodiment of the utility model provides a board-to-board connector, comprising an insulating base 1, a socket terminal 2, a center island protection sheet 3 and an end wall protection sheet 4. Specifically:

[0032] The insulating base 1 is the basic part of the socket connector. As a mounting base for other components, it provides a physical support and plays a role in electrical insulation, which can isolate various conductive terminals so that the various conductive terminals will not interfere with each other.

[0033] like Figures 1 to 3 As shown, in this embodiment, the main body of the insulating base 1 adopts a rectangular box structure design, including a pair of long side structures 101 arranged oppositely, a pair of short side structures 102 arranged oppositely, and an island structure 103 which is integrated and arranged in the middle of the bottom plate of the insulating base 1 and protrudes upwards. The island structure 103 is separated from the long side structure 101 and the short side structure 102 by a certain distance, forming a circular insertion slot 104 for plugging with the plug connector 6. The inner wall of the long side structure 101 and the outer wall of the island structure 103 are also provided with a mounting groove 105. The socket terminal 2 is installed between the long side structure 101 and the island structure 103 in the insulating base 1 through the mounting groove 105. The socket terminal 2 is made of an elastic metal sheet and serves as the main working part of the board-to-board connector. When the plug connector 6 is inserted into the socket connector, one end of the socket terminal can form a close contact with the plug terminal through the elastic force generated by elastic deformation to complete the electrical connection function. The other end passes through the bottom plate of the insulating base 1 and is exposed outside the insulating base 1, which is used to connect the circuit board to realize the transmission of electrical signals.

[0034] The center island protection sheet 3 is a component formed integrally by stamping and bending a metal plate. It mainly plays a protective role to reduce the wear of the connector during the plugging and unplugging process of the connector assembly and increase the service life of the socket connector. At the same time, it can also cooperate with the metal protection sheet on the plug connector 6 to improve the electromagnetic shielding performance of the connector assembly.

[0035] like Figure 5 As shown, in this embodiment, the island protection sheet 3 includes a cap portion 301, a connection and fixing portion 302, an elastic contact portion 303 and an island welding foot 304. The cap portion 301 covers the end of the island structure 103, and the connection and fixing portion 302 is arranged on the bottom plate of the insulating base 1 and is bent downward with a certain arc, so that the island welding foot 304 can pass through the bottom plate of the insulating base 1 and be exposed outside the insulating base 1, so as to improve the stability of the connection between the island protection sheet 3 and the insulating base 1; the elastic contact portion 303 is arranged on both sides of the connection and fixing portion 302 and extends upward to further ensure the reliable connection between the socket connector and the plug connector 6; the island welding foot 304 is arranged on both sides of the connection and fixing portion 302, and extends a certain length in the direction of the long side structure 101 to be exposed at the bottom of the insulating base 1, so as to facilitate the subsequent welding with the PCB pad 5.

[0036] The end wall protection sheet 4 is also an integrally formed member made of a metal plate by stamping and bending, and is used to strengthen the structural strength of the insulating base 1 to prevent the connector from being damaged when subjected to external impact.

[0037] like Figures 1 to 6 As shown, the end wall protection sheet 4 covers the upper side of the short side structure 102 and extends along the long side structure 101, including an end covering portion 401, a side covering portion 402, a first welding leg 403 and a second welding leg 404. Among them, the end covering portion 401 covers the upper side of the two short side structures 102 of the insulating base 1; the side covering portion 402 partially covers the upper side of the two long side structures 101 of the insulating base 1; the first welding leg 403 is arranged below the side covering portion 402, and an undercut 407 is also arranged on the first welding leg 403 to improve the bonding force between the end wall protection sheet 4 and the insulating base 1; the second welding leg 404 is arranged below the junction of the end covering portion 401 and the side covering portion 402, so as to effectively disperse the external force borne by the end wall protection sheet 4 during the plugging and unplugging process and increase the fastening force, thereby preventing the end wall protection sheet 4 from warping and deformation during use. In addition, the second solder leg 404 also shares a PCB pad 5 with the center island solder leg 304 located on the same side thereof. While the center island solder leg 304 is being welded to the PCB pad 5, the second solder leg 404 can also be welded and fixed to the PCB pad 5, thereby improving the stability and reliability of the component while ensuring the installation efficiency of the board-to-board connector.

[0038] like Figure 7As shown, further, a chamfer 405 is provided on the inner side of the second welding leg 404 near the center welding leg 304 to facilitate soldering between the second welding leg 404 and the center welding leg 304, making the welding more secure.

[0039] like Figures 6 to 9 As shown, as a preferred embodiment, the side wall of the end cover portion 401 is further provided with an arc-shaped protrusion 406 facing the island structure 103. The arc-shaped protrusion 406 serves as a snap-fit ​​point, and can be snap-fitted with the snap-fit ​​opening 601 on the outer wall of the plug connector 6 after the plug connector 6 is fully inserted into the socket connector, thereby ensuring the correct connection between the plug connector 6 and the socket connector.

[0040] The above-mentioned embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A board-to-board connector, characterized in that: include: An insulating base (1) comprising a pair of relatively arranged long side structures (101), a pair of relatively arranged short side structures (102) and a central island structure (103); A socket terminal (2) installed in a mounting groove (105) between the long side structure (101) and the island structure (103); The island protection sheet (3) comprises a cap portion (301) covering the end of the island structure (103), a connection fixing portion (302) arranged on the bottom plate of the insulating base (1), elastic contact portions (303) arranged on both sides of the connection fixing portion (302) and extending upward, and island welding feet (304) arranged on both sides of the connection fixing portion (302) and extending in the direction of the long side structure (101); The end wall protection sheet (4) comprises an end covering portion (401) covering the upper sides of the two short side structures (102) of the insulating base (1), and a side covering portion (402) partially covering the upper sides of the two long side structures (101) of the insulating base (1); a first welding leg (403) is provided below the side covering portion (402), and a second welding leg (404) is provided below the junction between the end covering portion (401) and the side covering portion (402).

2. A board-to-board connector according to claim 1, characterized in that: The second soldering foot (404) and the center island soldering foot (304) located on the same side of the insulating base (1) share a PCB soldering pad (5).

3. A board-to-board connector according to claim 2, characterized in that: A chamfer (405) is provided on the inner side of the second solder leg (404) near the center island solder leg (304) to facilitate soldering of the second solder leg (404) and the center island solder leg (304).

4. The board-to-board connector according to claim 1, characterized in that: The connecting and fixing portion (302) of the center island protection sheet (3) is bent downwards with a certain arc, so that the center island welding foot (304) can pass through the bottom plate of the insulating base (1) and be exposed outside the insulating base (1).

5. The board-to-board connector according to claim 1, characterized in that: The first welding leg (403) is also provided with an undercut (407) for improving the bonding force between the end wall protection sheet (4) and the insulating base (1).

6. The board-to-board connector according to claim 1, characterized in that: An arc-shaped protrusion (406) facing the island structure (103) is also provided on the side wall of the end covering portion (401).

7. A board-to-board connector according to any one of claims 1 to 6, characterized in that: The center island protection sheet (3) and the end wall protection sheet (4) are both made of metal material.

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