Automobile switch circuit board matching structure

Abstract

The utility model discloses a kind of matching structures between automobile switch circuit board, for the electrical connection of first circuit board and second circuit board, including connector, the connector is attached on first circuit board by SMT process, and the connector is electrically connected with the first circuit board, the second circuit board is inserted with the connector and cooperates, and the second circuit board is electrically connected with the connector.The utility model can significantly improve production efficiency, and its production process has reworkability, play the role of reducing cost and improving efficiency, in addition, it also has the advantage that contact reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of automotive switch technology, and more specifically to a matching structure between automotive switch circuit boards. Background Technology

[0002] In the field of automotive switches, signal transmission between different circuit boards is generally achieved through pin soldering. However, this method has the following drawbacks in actual production and use: 1. Low production efficiency: Traditional pin welding requires manual alignment, single module welding takes a long time, and secondary reflow soldering is required, with long temperature control time. 2. Lack of reworkability: If a cold solder joint is detected after the circuit board has been soldered, the entire module needs to be replaced, significantly increasing rework costs; 3. Low contact reliability: In vibration environments (such as when a car is in motion), the contact resistance of the pins is prone to fluctuation (>50mΩ), which can cause signal attenuation or interruption.

[0003] To address the aforementioned deficiencies, it is necessary to improve the existing matching structure between automotive switch circuit boards in order to resolve these issues. Utility Model Content

[0004] The purpose of this utility model is to provide a matching structure between automotive switch circuit boards. This utility model can significantly improve production efficiency, and its production process is reworkable, which can reduce costs and improve efficiency. In addition, it also has the advantage of high contact reliability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a matching structure between automotive switch circuit boards for electrical connection of a first circuit board and a second circuit board, including a connector, wherein the connector is mounted on the first circuit board by SMT process and is electrically connected to the first circuit board, and the second circuit board is plugged into and connected to the connector.

[0006] By adopting the above technical solution, the two circuit boards are connected through a circuit board connector. The first circuit board serves as the main circuit board, and a connector is installed on the first circuit board. When it is necessary to connect to other modules, the second circuit board (sub-circuit board) only needs to be plugged into the connector, making assembly very convenient. The circuit board connector adopts SMT technology, which greatly improves production efficiency during the production process. The circuit board connector matching structure allows for rework during the production process, which can reduce costs and improve efficiency.

[0007] The present invention is further configured such that the connector includes an insulating base and multiple pairs of metal conductive plates. The insulating base is provided with a slot for inserting a second limiting plate. Each pair of metal conductive plates is symmetrically arranged on both sides of the corresponding slot on the insulating base. The upper surface of the first circuit board is provided with a first conductive part for abutting against one end of the metal conductive plate and forming an electrical connection. The two sides of the second limiting plate are provided with second conductive parts for abutting against the other end of the corresponding metal conductive plate.

[0008] By adopting the above technical solution, the specific structure of the connector is supported and conductive by multiple pairs of metal conductive sheets, which can effectively improve the reliability of the connection between the two circuit boards.

[0009] The present invention is further configured such that the metal conductive sheet includes a vertical fixing part fixedly disposed on an insulating base, a first contact part vertically disposed at the lower end of the vertical fixing part, an elastic bending part disposed at the upper end of the vertical fixing part, an inclined extension part disposed at the lower end of the elastic bending part and extending into the slot, and an arc-shaped contact part disposed on the inclined extension part. The first contact part on the metal conductive sheet abuts against the corresponding first conductive part on the first circuit board, and the arc-shaped contact part on the metal conductive sheet abuts against the corresponding second conductive part on the second circuit board.

[0010] By adopting the above technical solution, the specific structure of the metal conductive sheet is that of a spring sheet. The built-in spring sheet in the circuit board connector can effectively improve the contact reliability.

[0011] The present invention is further configured such that the distance between the arc-shaped contact portions of each pair of metal conductive sheets is less than the thickness of the second circuit board.

[0012] By adopting the above technical solution, the elastic bending part provides pre-tightening force, which can make the arc-shaped contact part of each pair of metal conductive sheets press against the second conductive part on the second circuit board, resulting in higher contact reliability.

[0013] The present invention is further configured such that the insulating base is provided with a groove for inserting metal conductive sheets, so that every two adjacent metal conductive sheets are separated.

[0014] By adopting the above technical solution, short circuits caused by metal contact or foreign objects between two adjacent metal conductive sheets can be effectively avoided. At the same time, electromagnetic interference can be reduced, ensuring the stability of signal transmission.

[0015] The present invention is further configured such that the bottom of the insulating base is provided with a plurality of positioning protrusions, and the first circuit board is provided with a plurality of positioning holes corresponding to the number of positioning protrusions, wherein the positioning protrusions are inserted into and engaged with the corresponding positioning holes.

[0016] By adopting the above technical solution, it is not only convenient to position and install the insulating base, which facilitates its rapid and accurate matching with the first circuit board, but also to further improve the stability of the insulating base installation.

[0017] The present invention is further provided that the insulating seat has a tapered flare at the upper end of the slot, which is larger at the top and smaller at the bottom.

[0018] By adopting the above technical solution, the tapered flare guides the second circuit board when it mates with the connector, making it easier and more convenient to connect and mate with the connector. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model; Figure 2 This is a schematic diagram of the structure of the second circuit board of this utility model after it is disconnected from the connector; Figure 3 This is a cross-sectional view of the entire utility model; Figure 4 This is a schematic diagram of the disassembly structure of the connector and the first circuit board of this utility model.

[0020] In the diagram: 1. First circuit board; 2. Second circuit board; 3. Connector; 4. Insulating base; 5. Metal conductive sheet; 6. Slot; 7. First conductive part; 8. Second conductive part; 9. Vertical fixing part; 10. First contact part; 11. Elastic bending part; 12. Inclined extension part; 13. Arc-shaped contact part; 14. Groove; 15. Positioning protrusion; 16. Positioning hole; 17. Tapered flare. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: As attached Figures 1-4The diagram illustrates a matching structure between automotive switch circuit boards for electrical connection of a first circuit board 1 and a second circuit board 2. It includes a connector 3, which is mounted on the first circuit board 1 using SMT (Surface Mount Technology) and is electrically connected to it. The second circuit board 2 is plugged into the connector 3 and is also electrically connected to it. The two circuit boards are connected via the connector 3. The first circuit board 1 serves as the main circuit board, and the connector 3 is mounted on it. When connecting to other modules, the second circuit board 2 (a sub-circuit board) is simply plugged into the connector 3, making assembly very convenient. The use of SMT technology for the connector 3 significantly improves production efficiency. Furthermore, the connector 3 matching structure allows for rework during production, thus reducing costs and improving efficiency.

[0023] It is worth mentioning that the number of connectors 3 on the first circuit board 1 can be one or more, to accommodate one or more second circuit boards 2.

[0024] As attached Figure 2 and attached Figure 3 As shown, the connector 3 includes an insulating base 4 and multiple pairs of metal conductive plates 5. The insulating base 4 has slots 6 for inserting a second limiting plate. Each pair of metal conductive plates 5 is symmetrically arranged on both sides of the corresponding slot 6 on the insulating base 4. The upper surface of the first circuit board 1 has a first conductive part 7 for abutting against one end of the metal conductive plate 5 and forming an electrical connection. The first conductive parts 7 are arranged in two rows in a matrix. The second limiting plate has second conductive parts 8 on both sides for abutting against the other end of the corresponding metal conductive plate 5. The second conductive parts 8 are arranged on both sides of the second circuit board 2, with one row of second conductive parts 8 on each side. The first conductive parts 7 and the second conductive parts 8 are gold finger structures made of gold material, which is a mature existing technology. This is the specific structure of the connector 3, supported and conductive by multiple pairs of metal conductive plates 5, which can effectively improve the reliability of the connection between the two circuit boards.

[0025] As attached Figure 2 and attached Figure 3As shown, the metal conductive sheet 5 includes a vertical fixing part 9 fixedly disposed on the insulating base 4, a first contact part 10 vertically disposed at the lower end of the vertical fixing part 9, an elastic bending part 11 disposed at the upper end of the vertical fixing part 9, an inclined extension part 12 disposed at the lower end of the elastic bending part 11 and extending towards the slot 6, and an arc-shaped contact part 13 disposed on the inclined extension part 12. The end of the arc-shaped contact part 13 facing the slot 6 is a protrusion. The first contact part 10 on the metal conductive sheet 5 abuts against the corresponding first conductive part 7 on the first circuit board 1, and the arc-shaped contact part 13 on the metal conductive sheet 5 abuts against the corresponding second conductive part 8 on the second circuit board 2. This is the specific structure of the metal conductive sheet 5, which is a spring sheet structure. The built-in spring sheet in the circuit board connector 3 can effectively improve the contact reliability.

[0026] As attached Figure 3 As shown, the distance between the arc-shaped contact portions 13 of each pair of metal conductive sheets 5 is less than the thickness of the second circuit board 2. This causes the metal conductive sheets 5 to deform when they mate with the second circuit board 2, and the elastic bending portion 11 provides a pre-tightening force, which ensures that the arc-shaped contact portions 13 of each pair of metal conductive sheets 5 abut against the second conductive portion 8 on the second circuit board 2, resulting in higher contact reliability.

[0027] As attached Figure 2 As shown, the insulating base 4 is provided with a slot 14 for inserting the metal conductive sheet 5, so that each two adjacent metal conductive sheets 5 are separated, that is, the elastic bending portion 11, the inclined extension portion 12, and the arc-shaped contact portion 13 on the two adjacent metal conductive sheets 5 are separated. This design can effectively avoid short circuits caused by metal contact or foreign objects between two adjacent metal conductive sheets 5. At the same time, it can also reduce electromagnetic interference and ensure the stability of signal transmission.

[0028] As attached Figure 4 As shown, the bottom of the insulating base 4 is provided with multiple positioning protrusions 15, and the first circuit board 1 is provided with multiple positioning holes 16, the number of which is equivalent to the number of positioning protrusions 15. The cross-section of the positioning protrusions 15 and the positioning holes 16 can be circular, and the positioning protrusions 15 are inserted into the corresponding positioning holes 16. This not only facilitates the positioning and installation of the insulating base 4 and enables its quick and accurate mating with the first circuit board 1, but also further improves the firmness of the installation of the insulating base 4.

[0029] As attached Figure 2 As shown, the insulating base 4 has a tapered flare 17 at the upper end of the slot 6, which is larger at the top and smaller at the bottom. The tapered flare 17 guides the second circuit board 2 when it mates with the connector 3, making it easier and better to connect and mate with the connector 3.

Claims

1. A matching structure between automotive switch circuit boards for electrical connection of a first circuit board (1) and a second circuit board (2), characterized in that: The device includes a connector (3), which is mounted on a first circuit board (1) by SMT process and is electrically connected to the first circuit board (1). A second circuit board (2) is plugged into the connector (3) and is electrically connected to the connector (3).

2. The matching structure between automotive switch circuit boards according to claim 1, characterized in that: The connector (3) includes an insulating base (4) and multiple pairs of metal conductive plates (5). The insulating base (4) is provided with a slot (6) for inserting the second limiting plate. Each pair of metal conductive plates (5) is symmetrically arranged on both sides of the corresponding slot (6) on the insulating base (4). The upper surface of the first circuit board (1) is provided with a first conductive part (7) for abutting against one end of the metal conductive plate (5) and forming an electrical connection. The two sides of the second limiting plate are provided with a second conductive part (8) for abutting against the other end of the corresponding metal conductive plate (5).

3. The matching structure between automotive switch circuit boards according to claim 2, characterized in that: The metal conductive sheet (5) includes a vertical fixing part (9) fixedly disposed on the insulating base (4), a first contact part (10) vertically disposed at the lower end of the vertical fixing part (9), an elastic bending part (11) disposed at the upper end of the vertical fixing part (9), an inclined extension part (12) disposed at the lower end of the elastic bending part (11) and extending toward the slot (6), and an arc-shaped contact part (13) disposed on the inclined extension part (12). The first contact part (10) on the metal conductive sheet (5) abuts against the corresponding first conductive part (7) on the first circuit board (1), and the arc-shaped contact part (13) on the metal conductive sheet (5) abuts against the corresponding second conductive part (8) on the second circuit board (2).

4. The matching structure between automotive switch circuit boards according to claim 3, characterized in that: The distance between the arc-shaped contact portions (13) of each pair of metal conductive sheets (5) is less than the thickness of the second circuit board (2).

5. The matching structure between automotive switch circuit boards according to claim 1, characterized in that: The insulating base (4) is provided with a slot (14) for inserting the metal conductive sheet (5) so that each two adjacent metal conductive sheets (5) are separated.

6. The matching structure between automotive switch circuit boards according to claim 1, characterized in that: The bottom of the insulating base (4) is provided with a plurality of positioning protrusions (15), and the first circuit board (1) is provided with a plurality of positioning holes (16) in a number equivalent to the number of positioning protrusions (15). The positioning protrusions (15) are inserted into the corresponding positioning holes (16).

7. The matching structure between automotive switch circuit boards according to claim 1, characterized in that: The insulating base (4) is provided with a tapered flared opening (17) that is larger at the top and smaller at the bottom at the upper end of the slot (6).

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