CN216488590U - Pin for welding and fixing - Google Patents
Pin for welding and fixing Download PDFInfo
- Publication number
- CN216488590U CN216488590U CN202123454808.1U CN202123454808U CN216488590U CN 216488590 U CN216488590 U CN 216488590U CN 202123454808 U CN202123454808 U CN 202123454808U CN 216488590 U CN216488590 U CN 216488590U
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- needle bar
- welding
- main part
- bar main
- diameter
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Abstract
The utility model discloses a stitch for welded fastening, including the needle bar main part, the upper end of needle bar main part is equipped with spacing cap, is equipped with the fixed column between spacing cap and the needle bar main part, the diameter of spacing cap is greater than the diameter of fixed column, and the diameter of fixed column is greater than the diameter of needle bar main part, the lower extreme of needle bar main part is equipped with the welding needle head, and the diameter of welding needle head equals the diameter of needle bar main part, and welding needle head lower extreme is equipped with the welding sphere. The utility model discloses have the performance that the welding is effectual, the tensile is dragged, the upper end of needle bar main part is equipped with spacing cap, the top cross-sectional area of spacing cap is big, but greatly increased welding area, the fastness of improvement welding point, the needle bar main part can be with module welded fastening to a circuit board on, the fixed column can cooperate with the installation hole site in the module simultaneously, and then improve the location nature of needle bar main part, avoid the module vibrations to cause adverse effect to the top welding point, avoid taking place contact failure.
Description
Technical Field
The utility model relates to an electrode welding technical field especially relates to a stitch for welded fastening.
Background
Currently, a driving circuit board of a vehicle-mounted a5 module (GPRS communication module) or an IGBT (Insulated Gate Bipolar Transistor) module usually integrates a driving power circuit and a driving IC (integrated circuit) on one circuit board. The driving circuit board is connected with the module through pins or directly welded on the module. The stitch has the defects of frequent abrasion, easy bending, easy oxidation of a welding head, poor welding effect, short service life and the like in the using process. Therefore, the research on how to improve the pin welding and fixing effect has very important significance on the integration module to the circuit board. Designing and developing a novel pin for welding is always an important research and development direction.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the problem that above-mentioned prior art exists, provide a stitch for welded fastening, make things convenient for module welded fastening circuit board to increase the overall arrangement space of drive IC circuit board.
The utility model provides a technical scheme that its technical problem adopted: the utility model provides a stitch for welded fastening, includes the needle bar main part, the upper end of needle bar main part is equipped with spacing cap, is equipped with the fixed column between spacing cap and the needle bar main part, the diameter of spacing cap is greater than the diameter of fixed column, and the diameter of fixed column is greater than the diameter of needle bar main part, the lower extreme of needle bar main part is equipped with the welding needle head, and the diameter of welding needle head equals the diameter of needle bar main part, and welding needle head lower extreme is equipped with the welding sphere.
For further improvement, the length ratio of the needle bar main body to the fixing column is 5-5.5.
Further perfection, the diameter ratio of the fixed column to the limiting cap is 0.5-0.6.
Further perfection, the ratio of the height length of the fixing column to the height length of the limiting cap is 6-7.
Further perfection, the fixing column and the needle bar body are in fillet transition, and the fillet radius is 0.2-0.5 mm.
Further perfection, the height of the limiting cap is 0.3-0.8 mm.
Further perfection, the diameter of the needle bar main body is 0.5-1.5 mm.
Further perfection, the needle bar main body is stamped and formed with a welding part with a regular polygon cross section, and each side surface of the welding part is formed with a convex or concave vertical stripe.
Further perfection, side holes are formed on the surface of the welding needle head.
The utility model discloses profitable effect is: the utility model discloses it is effectual to have the welding, the performance that the tensile was dragged, the upper end of needle bar main part is equipped with spacing cap, the top cross-sectional area of spacing cap is big, but greatly increased welding area, the fastness of welding point is improved, the needle bar main part can be with module welded fastening to a circuit board, be equipped with the fixed column between spacing cap and the needle bar main part simultaneously, can the installation hole site of fixed mounting to the module, and then improve the location nature of needle bar main part, avoid the module vibrations to cause (junction fracture etc.) adverse effect to the top welding point, avoid taking place contact failure, the lower extreme of needle bar main part is equipped with the soldering needle head, conveniently weld the second circuit board, increase the overall arrangement space of circuit board.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view of a soldering tip;
FIG. 3 is a schematic structural view of example 2;
description of reference numerals: 1. the needle bar main part, 2, spacing cap, 3, fixed column, 4, welding needle head, 5, welding sphere, 6, welding part, 7, vertical stripe, 8, side opening.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
referring to figure 1: in this embodiment 1, a pin for welding and fixing includes a needle bar body 1, the needle bar body 1 is made of conductive materials such as copper, stainless steel or aluminum copper, a limiting cap 2 is disposed at the upper end of the needle bar body 1, which can not only limit the needle bar body, but also increase the welding area between the needle bar body and a module, a fixing post 3 is disposed between the limiting cap 2 and the needle bar body 1, the fixing post 3 can be matched with a hole on a module housing, so as to improve the positioning property of a fixing point of the needle bar body 1, so that the needle bar body 1 is not easily bent or dropped by an external force, the diameter of the limiting cap 2 is greater than that of the fixing post 3, the diameter of the fixing post 3 is greater than that of the needle bar body 1, thereby forming a stepped structure, which can improve the positioning precision of the needle bar body 1, a welding needle head 4 is disposed at the lower end of the needle bar body 1, and the diameter of the welding needle head 4 is equal to that of the needle bar body 1, the lower end of the welding needle head 4 is provided with a welding spherical surface 5, which is convenient for the diffusion of soldering tin to form a large welding point. Side hole 8 is formed in the surface of the welding needle head 4, the welding area can be further enlarged, and after molten soldering tin flows into the side hole 8 and is solidified, the welding firmness can be improved. The length ratio of the needle bar main body 1 to the fixing column 3 is 5-5.5, and the diameter ratio of the fixing column 3 to the limiting cap 2 is 0.5-0.6. The ratio of the height length of the fixing column 3 to the height length of the limiting cap 2 is 6-7. The fixing column 3 and the needle bar body 1 are in fillet transition, and the radius of the fillet is 0.2-0.5 mm. The height of the limiting cap 2 is 0.3-0.8 mm. The diameter of the needle bar body 1 is 0.5-1.5 mm.
The stitch has good welding effect and is resistant to pulling. The top cross-sectional area of spacing cap 2 is big, but greatly increased area of weld, improve the fastness of welding point, needle bar main part 1 can be with module welded fastening to a circuit board, fixed column 3 can the installation hole site of fixed mounting in the module simultaneously, and then improve the location nature of needle bar main part 1, avoid module vibrations to cause (junction fracture etc.) adverse effect to the top welding point, avoid taking place the trouble of contact failure, needle head 4 of the lower extreme of needle bar main part 1 can peg graft and the welded fastening second circuit board, increase the overall arrangement space of circuit board, realize the range upon range of design of circuit board stack, improve space utilization, strengthen the integrated nature and the thermal diffusivity of circuit board module.
As shown in fig. 2, the embodiment 2 is different from the embodiment 1 only in that a welding portion 6 having a regular polygonal cross-sectional shape is press-molded on the needle bar body 1, and a vertical stripe 7 of a protrusion or a depression is formed on each side of the welding portion 6. Welding portion 6 can with the cooperation of pegging graft of the welding hole on the circuit board, after the tin on the pad, soldering tin can flow into the clearance between 6 every sides of welding portion and the welding hole, improves welded fastness ability, vertical stripe 7 is snakelike friction line, can combine together with the back soldering tin that solidifies, makes things convenient for the attached to of soldering tin to further improve solder joint and 6 welded fastnesses of welding portion, be difficult to produce defects such as rosin joint.
While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.
Claims (9)
1. A stitch for weld fastening, comprising a needle bar body (1), characterized in that: the upper end of needle bar main part (1) is equipped with spacing cap (2), is equipped with fixed column (3) between spacing cap (2) and needle bar main part (1), the diameter of spacing cap (2) is greater than the diameter of fixed column (3), and the diameter of fixed column (3) is greater than the diameter of needle bar main part (1), the lower extreme of needle bar main part (1) is equipped with welds syringe needle (4), and the diameter of welding syringe needle (4) equals the diameter of needle bar main part (1), welds syringe needle (4) lower extreme and is equipped with welding sphere (5).
2. A pin for solder attachment as claimed in claim 1, wherein: the length ratio of the needle bar main body (1) to the fixing column (3) is 5-5.5.
3. A pin for solder attachment as claimed in claim 1, wherein: the diameter ratio of the fixing column (3) to the limiting cap (2) is 0.5-0.6.
4. A pin for solder attachment as claimed in claim 1, wherein: the height length ratio of the fixing column (3) to the limiting cap (2) is 6-7.
5. A pin for solder attachment as claimed in claim 1, wherein: the fixing column (3) and the needle bar body (1) are in fillet transition, and the radius of the fillet is 0.2-0.5 mm.
6. A pin for solder attachment as claimed in claim 1, wherein: the height of the limiting cap (2) is 0.3-0.8 mm.
7. A pin for solder attachment as claimed in claim 1, wherein: the diameter of the needle bar main body (1) is 0.5-1.5 mm.
8. A pin for solder attachment as claimed in claim 1, wherein: the needle bar body (1) is stamped and formed with a welding part (6) with a regular polygon cross section, and each side of the welding part (6) is formed with a raised or depressed vertical stripe (7).
9. A pin for solder attachment as claimed in claim 1, wherein: and a side hole (8) is formed on the surface of the welding needle head (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123454808.1U CN216488590U (en) | 2021-12-31 | 2021-12-31 | Pin for welding and fixing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123454808.1U CN216488590U (en) | 2021-12-31 | 2021-12-31 | Pin for welding and fixing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216488590U true CN216488590U (en) | 2022-05-10 |
Family
ID=81433429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123454808.1U Active CN216488590U (en) | 2021-12-31 | 2021-12-31 | Pin for welding and fixing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216488590U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779055A (en) * | 2022-06-20 | 2022-07-22 | 西安交通大学城市学院 | Automatic check out test set of electrical control board |
-
2021
- 2021-12-31 CN CN202123454808.1U patent/CN216488590U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779055A (en) * | 2022-06-20 | 2022-07-22 | 西安交通大学城市学院 | Automatic check out test set of electrical control board |
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