Printed board and conductive pin welding positioning tool

Abstract

The utility model provides a printed board and conductive pin welding positioning tool which comprises a base, the surface of the base is provided with a positioning hole, the positioning hole is a rectangular through hole, and at least one side edge of an orifice of the positioning hole is provided with a limiting chamfer. Specifically, preferably, the depth of the limiting chamfer is not smaller than 25% of the depth of the positioning hole, and the depth of the positioning hole is not smaller than 50% of the height of the base. And the inclination angle between the limiting chamfer and the horizontal plane is 30-60 degrees. According to the technical scheme of the utility model, when the conductive pin and the printed board are welded, the conductive pin is not easy to fall down under the action of gravity when the conductive pin is placed in the positioning hole due to the limiting chamfer arranged at the hole opening of the positioning hole, so that the welded conductive pin and the printed board maintain enough contact area, the width of a welding seam is favorably increased, and the welding quality is improved. Pseudo soldering is avoided; and the conductive contact pins are bent along a uniform direction through the limiting chamfers, so that the connection direction of the conductive contact pins and the printed board can be prevented from being reversed when a worker performs welding.

Description

Technical Field

[0001] This utility model relates to the field of welding process equipment technology, and in particular to a welding positioning fixture for printed circuit boards and conductive pins. Background Technology

[0002] In integrated circuit boards, the surface of the printed circuit board often carries numerous electronic components. In addition, the surface of the printed circuit board is also soldered to conductive pins. The conductive pins are used to introduce external power or external electrical signals to the electronic components on the surface of the printed circuit board, thereby realizing the function and purpose of the circuit board. However, with the development of integrated circuit technology, the size of printed circuit boards and conductive pins is getting smaller and smaller, which increases the difficulty of the soldering process between conductive pins and the surface of the printed circuit board. Due to the small size of the conductive pins, they are easily displaced by external forces during the soldering process, affecting the positioning accuracy of the conductive pins. Therefore, when soldering conductive pins to the printed circuit board, it is necessary to design and develop corresponding positioning fixtures.

[0003] In the prior art, patent document with publication number "CN215545642U" discloses an assembly and soldering fixture for a printed circuit board assembly used in a reverse connection protection circuit. The printed circuit board assembly includes a printed circuit board and multiple input / output pins and multiple diodes soldered onto the printed circuit board. The assembly and soldering fixture includes a fixture base, with the transverse long axis of the fixture base defined as the X-direction and the transverse direction perpendicular to the X-direction defined as the Y-direction. A base groove is provided on the upper part of the middle section of the fixture base in the X-direction, and multiple pin slots are provided at the bottom of the base groove. Mounting grooves are provided on the upper parts of the groove walls at both ends of the base groove in the X-direction. Multiple diode slots are provided on the bottom surface of the fixture base near the edge on the Y-direction side. This patented technical solution improves the positioning accuracy of the pins to a certain extent. However, conductive pins are generally elongated, making it difficult to place them upright, which affects the weld width and causes the conductive pins to easily fall off after soldering or result in incomplete soldering. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a welding and positioning fixture for printed circuit boards and conductive pins.

[0005] This utility model is achieved through the following technical solution.

[0006] This utility model provides a welding and positioning fixture for a printed circuit board and conductive pins, including a base. The surface of the base is provided with a positioning hole, which is a rectangular through hole, and at least one side of the positioning hole has a limiting chamfer.

[0007] The depth of the limiting chamfer is not less than 25% of the depth of the positioning hole, and the depth of the positioning hole is not less than 50% of the height of the base.

[0008] The angle between the limiting chamfer and the horizontal plane is 30° to 60°.

[0009] The surface of the base is also provided with an outer edge positioning platform.

[0010] The outer edge positioning platform is a long strip-shaped boss.

[0011] The surface of the base is also provided with an inner edge positioning platform.

[0012] The inner edge positioning platform is a semi-cylindrical boss.

[0013] The bottom surface of the base is also provided with a hollowed-out groove.

[0014] The base is also provided with flow guide grooves on the left and right sides.

[0015] The base is also provided with draft angles around its perimeter.

[0016] The beneficial effects of this utility model are as follows: When the conductive pin is soldered to the printed circuit board using the technical solution of this utility model, the positioning hole provided on the surface of the base enables the conductive pin to be well positioned. The limiting chamfer provided at the opening of the positioning hole, on the one hand, makes it difficult for the conductive pin to fall downward under its own weight when it is placed into the positioning hole, thereby maintaining a sufficient contact area between the soldered conductive pin and the printed circuit board, which is beneficial to increasing the weld width and avoiding incomplete soldering; on the other hand, the limiting chamfer makes the conductive pin bend in a uniform direction, which can prevent the worker from reversing the connection direction between the conductive pin and the printed circuit board during soldering. Attached Figure Description

[0017] Figure 1 This is an isometric drawing of this utility model;

[0018] Figure 2 This is a top view of the present invention;

[0019] Figure 3 This is the front view of the base of this utility model.

[0020] In the figure: 1-base, 2-positioning hole, 3-limiting chamfer, 4-outer edge positioning platform, 5-inner edge positioning platform, 6-hollowed-out groove, 7-guide groove, 8-draft bevel, 9-printed board. Detailed Implementation

[0021] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0022] like Figures 1 to 3As shown, this utility model provides a welding and positioning fixture for a printed circuit board and conductive pins, including a base 1. The surface of the base 1 is provided with a positioning hole 2, which is a rectangular through hole, and at least one side of the opening of the positioning hole 2 is provided with a limiting chamfer 3.

[0023] By employing the technical solution of this utility model, when soldering conductive pins to printed circuit boards, the positioning holes provided on the base surface ensure good positioning of the conductive pins. The limiting chamfer at the opening of the positioning holes prevents the conductive pins from falling downwards under their own weight when inserted into the positioning holes, thus maintaining sufficient contact area between the soldered conductive pins and the printed circuit board, which helps to increase the weld width and avoid incomplete soldering. On the other hand, the limiting chamfer causes the conductive pins to bend in a uniform direction, preventing workers from reversing the connection direction between the conductive pins and the printed circuit board during soldering.

[0024] Specifically, the depth of the limiting chamfer 3 is not less than 25% of the depth of the positioning hole 2, and the depth of the positioning hole 2 is not less than 50% of the height of the base 1. The angle between the limiting chamfer 3 and the horizontal plane is 30° to 60°.

[0025] In addition, the surface of the base 1 is also provided with an outer edge positioning platform 4. The outer edge positioning platform 4 is a long strip-shaped boss. The printed circuit board 9 is in the shape of a ring, and the surface of the base 1 is also provided with an inner edge positioning platform 5. The inner edge positioning platform 5 is used to position the inner edge of the printed circuit board 9. The inner edge positioning platform 5 is a semi-cylindrical boss.

[0026] In addition, the bottom surface of the base 1 is provided with a hollowed-out groove 6. The base 1 is made of non-metallic material. The hollowed-out groove 6 helps to reduce the weight of the base 1. The left and right sides of the base 1 are also provided with flow guide grooves 7. The flow guide grooves 7 help to maintain good ventilation on the bottom surface of the base, so that the molten solder can solidify and form weld spatter in a better environment.

[0027] Specifically, the base 1 is also provided with draft ramps 8 around its perimeter. The draft ramps 8 can be used to position the edges of the printed circuit board 9, ensuring proper positioning and improving the welding quality.

Claims

1. A printed board and conductive pin welding positioning tool, characterized in that: The base (1) is provided with a positioning hole (2) on its surface, the positioning hole (2) is a rectangular through hole, and at least one side of the hole opening of the positioning hole (2) is provided with a limiting chamfer (3).

2. The printed board and conductive pin welding positioning tooling of claim 1, wherein: The depth of the limiting chamfer (3) is not less than 25% of the depth of the positioning hole (2), and the depth of the positioning hole (2) is not less than 50% of the height of the base (1).

3. The printed board and conductive pin welding positioning tooling of claim 1 or 2, wherein: The inclination angle between the limiting chamfer (3) and the horizontal plane is 30-60°.

4. The printed board and conductive pin welding positioning tooling of claim 1, wherein: The surface of the base (1) is further provided with an outer edge positioning platform (4).

5. The printed board and conductive pin welding positioning tooling of claim 4, wherein: The outer edge positioning platform (4) is a long strip-shaped boss.

6. The printed board and conductive pin welding positioning tooling of claim 1, wherein: The surface of the base (1) is further provided with an inner edge positioning platform (5).

7. The printed board and conductive pin welding positioning tooling of claim 6, wherein: The inner edge positioning platform (5) is a semi-cylindrical boss.

8. The printed board and conductive pin welding positioning tooling of claim 1, wherein: The bottom surface of the base (1) is further provided with a hollow sunken groove (6).

9. The printed board and conductive pin welding positioning tooling of claim 8, wherein: The left and right sides of the base (1) are further provided with flow guide grooves (7).

10. The printed board and conductive pin soldering positioning tooling of claim 1 or 2 or 4 or 6 or 8 or 9, wherein: The periphery of the base (1) is further provided with a parting slope (8).

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