A mounting structure for a current carrier
By setting an oblique insertion pin at the bottom of the second sheet-shaped current-carrying part of the current-carrying sheet and tightly fitting with the welding mounting hole, the rework problem caused by loose fitting of the current-carrying sheet and the printed circuit board is solved, and the tight fitting state between the current-carrying sheet and the printed circuit board is realized, reducing production costs.
Patent Information
- Application Number
- CN202421325579.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In the prior art, the current carrier sheet and the printed circuit board are in a loose state, resulting in liquid tin being lifted up during the wave soldering process, and some or all of the straight-inserted pins cannot form a good electrical connection with the pad, which requires rework and repair, increasing production costs.
A current-carrying sheet is designed, by providing an oblique insertion pin at the bottom of the second sheet-shaped current-carrying part, the oblique insertion surface of the oblique insertion pin is tightly attached to the welding mounting hole to form a tight fit state to ensure good contact between the direct insertion pin and the pad.
The tight fit between the current carrier sheet and the printed circuit board is achieved, avoiding the problem of the current carrier sheet being pushed up during the wave soldering process, reducing the demand for rework, and reducing production costs.
Smart Images
Figure CN222706736U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a control circuit board, in particular to an installation structure for a current-carrying sheet in the control circuit board. Background Art
[0002] like Figure 1 As shown, an "L"-shaped current-carrying sheet 2 is currently installed on a printed circuit board 1 and is composed of a first sheet current-carrying portion 21 and a second sheet current-carrying portion 22 whose end is laterally connected to the corresponding end of the first sheet current-carrying portion 21. The first sheet current-carrying portion 21 is provided with seven straight-insertion pins 211 at its bottom, and the second sheet current-carrying portion 22 is provided with a straight-insertion pin 221 at its bottom. The straight-insertion pin 211 is inserted into the corresponding welding mounting hole (soldering pad) on the printed circuit board 1, and the straight-insertion pin 221 is inserted into the corresponding welding mounting hole 11 (soldering pad with an oblong hole) on the printed circuit board 1. The current-carrying sheet 2 and the printed circuit board 1 are in a loose fit state. When such a printed circuit board 1 undergoes wave soldering, the rolling liquid tin will push the current-carrying sheet 2 upward, so that part or all of the straight-insertion pins 211 and the straight-insertion pins 221 on the current-carrying sheet 2 cannot form a good electrical connection with the corresponding soldering pad, so that rework is required to repair it, which increases the production cost. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a mounting structure of a current-carrying sheet which can make the current-carrying sheet and the printed circuit board in a tight-fitting state.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an installation structure of a current-carrying sheet, comprising: a current-carrying sheet and a printed circuit board, the current-carrying sheet comprising: a first sheet-shaped current-carrying portion arranged in an "L" shape, and a second sheet-shaped current-carrying portion laterally connected to the first sheet-shaped current-carrying portion, the bottom of the first sheet-shaped current-carrying portion is provided with a straight-insertion pin, the bottom of the second sheet-shaped current-carrying portion is provided with an oblique-insertion pin, the oblique-insertion pin is provided with an oblique insertion surface inclined downward and outward on a side away from the first sheet-shaped current-carrying portion, the printed circuit board is provided with welding installation holes corresponding to the straight-insertion pins and the oblique-insertion pins one by one, the straight-insertion pins and the oblique-insertion pins are inserted in the corresponding welding installation holes, and the oblique-insertion surfaces of the oblique-insertion pins are tightly pressed against the corresponding welding installation holes.
[0005] As a preferred solution, in the installation structure of the current carrier, the angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board is ≥2.5°.
[0006] As a preferred solution, in the installation structure of the current carrier, the angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board is ≥4.5°.
[0007] As a preferred solution, in the installation structure of the current carrier, the angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board is ≤15°.
[0008] As a preferred solution, in the installation structure of the current carrier sheet, the current carrier sheet is an integrated structure.
[0009] As a preferred solution, in the installation structure of the current carrier, at least one side of the straight-insertion pin is provided with a straight-insertion limiting step, and the oblique-insertion pin is provided with an oblique-insertion limiting step on the other side relative to the oblique insertion surface.
[0010] As a preferred solution, in the installation structure of the current carrier, direct insertion limit steps are provided on both sides of the direct insertion pin.
[0011] The beneficial effects of the utility model are:
[0012] 1. The utility model provides an oblique insertion pin at the bottom of the second sheet-like current-carrying part, so that when the oblique insertion pin is obliquely inserted into the corresponding welding mounting hole, the oblique insertion surface on the oblique insertion pin will be tightly pressed against the corresponding welding mounting hole, and the oblique insertion surface extending out of the printed circuit board also plays a limiting role. In the process of inserting the oblique insertion pin into the corresponding welding mounting hole, the current-cutting piece will be pushed to move toward the first sheet-like current-carrying part, so that the outer side surface of the straight insertion pin is also tightly pressed against the corresponding welding mounting hole, so that the current-carrying piece and the printed circuit board are in a tight fit state, so that when the printed circuit board with the current-cutting piece inserted is subjected to wave soldering, the current-carrying piece will not be lifted up, thereby avoiding rework and reducing production costs.
[0013] 2. The utility model sets the angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board to a more appropriate angle, so that the installation of the current carrier is more convenient and smooth.
[0014] 3. The utility model provides limiting steps on the straight-insertion pins and the oblique-insertion pins, thereby ensuring that the first sheet-shaped current-carrying portion and the second sheet-shaped current-carrying portion are both higher than the surface of the printed circuit board, thereby ensuring the heat dissipation effect of the current-carrying sheet. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the installation structure of the current carrier described in the background technology.
[0016] Figure 1The reference numerals in the drawings are: 1, printed circuit board, 11, welding mounting hole, 2, current-carrying sheet, 21, first sheet-shaped current-carrying portion, 211, direct-insertion pin, 22, second sheet-shaped current-carrying portion, 221, direct-insertion pin.
[0017] Figure 2 It is a schematic diagram of the installation structure of the current carrier of the utility model.
[0018] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part B.
[0019] Figures 2 to 3 The reference numerals in the drawings are: 1, printed circuit board, 11, welding mounting hole, 111, corner, 2, current-carrying sheet, 21, first sheet-shaped current-carrying portion, 211, straight-insertion pin, 22, second sheet-shaped current-carrying portion, 222, oblique-insertion pin, 2221, oblique-insertion surface, 2222, oblique-insertion limiting step. DETAILED DESCRIPTION
[0020] The specific implementation scheme of the installation structure of the current carrier sheet described in the utility model is described in detail below with reference to the accompanying drawings.
[0021] like Figure 2 As shown, the installation structure of a current carrier described in the utility model includes: a current carrier 2 and a printed circuit board 1, the current carrier 2 includes: a first sheet current-carrying portion 21 arranged in an "L" shape, and a second sheet current-carrying portion 22 laterally connected to the first sheet current-carrying portion 21, seven straight-insertion pins 211 are arranged at the bottom of the first sheet current-carrying portion 21, and an oblique-insertion pin 222 is arranged on the bottom of the second sheet current-carrying portion 22, and the oblique-insertion pin 222 is on a side away from the first sheet current-carrying portion 21. An oblique plug-in surface 2221 is provided which is inclined downward and outward, and the printed circuit board 1 is provided with soldering mounting holes corresponding to the straight plug pins 211 one by one (it belongs to the conventional technology in this field and will not be described in detail here), and the straight plug pins 211 are inserted into the corresponding soldering mounting holes, and the printed circuit board 1 is provided with soldering mounting holes 11 corresponding to the oblique plug pins 222 one by one (the soldering mounting holes are usually oblong holes, that is, the two ends of the oblong holes are semicircular holes arranged oppositely), such as Figure 3As shown, the oblique insertion pin 222 is inserted into the welding mounting hole 11, and the oblique insertion surface 2221 on the oblique insertion pin 222 is pressed against the corner 111 of the welding mounting hole 11. During the pressing process, the corresponding surface of the straight insertion pin 211 is also pressed against the corresponding welding mounting hole, so that the entire carrier 2 and the printed circuit board 1 are in a tight fit. In this embodiment, both sides of the straight insertion pin 211 are provided with straight insertion limit steps (which belong to the conventional technology in this field and will not be described in detail here), and the oblique insertion pin 222 is provided with an oblique insertion limit step 2222 on the other side relative to the oblique insertion surface 2221.
[0022] In actual application, the carrier sheet 2 is an integrated structure, which is stamped from a copper strip. The angle between the oblique insertion surface 2221 of the oblique insertion pin 222 and the vertical direction perpendicular to the board surface of the printed circuit board 1 is controlled to be between 2.5° and 15°, preferably between 4.5° and 15°.
[0023] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made to the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims
1. A mounting structure for a current carrier, comprising: A current-carrying sheet and a printed circuit board, characterized in that the current-carrying sheet comprises: a first sheet-shaped current-carrying portion arranged in an "L" shape, and a second sheet-shaped current-carrying portion laterally connected to the first sheet-shaped current-carrying portion, the first sheet-shaped current-carrying portion is provided with a straight-insertion pin at its bottom, the second sheet-shaped current-carrying portion is provided with an oblique-insertion pin at its bottom, the oblique-insertion pin is provided with an oblique insertion surface inclined downward and outward on a side away from the first sheet-shaped current-carrying portion, the printed circuit board is provided with welding mounting holes corresponding to the straight-insertion pins and the oblique-insertion pins one by one, the straight-insertion pins and the oblique-insertion pins are inserted in the corresponding welding mounting holes, and the oblique insertion surface of the oblique-insertion pin is tightly pressed against the corresponding welding mounting hole.
2. The mounting structure of a current carrier according to claim 1, characterized in that: The angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board is ≥2.5°.
3. The mounting structure of a current carrier according to claim 2, characterized in that: The angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board is ≥4.5°.
4. The mounting structure of a current carrier according to claim 3, characterized in that: The angle between the oblique insertion surface of the oblique insertion pin and the vertical direction perpendicular to the board surface of the printed circuit board is ≤15°.
5. The mounting structure of a current carrier according to claim 1, characterized in that: The current carrier sheet is an integrated structure.
6. A mounting structure for a current carrier according to any one of claims 1 to 5, characterized in that: At least one side of the straight-insertion pin is provided with a straight-insertion limiting step, and the oblique-insertion pin is provided with an oblique-insertion limiting step on the other side relative to the oblique insertion surface.
7. The mounting structure of a current carrier according to claim 6, characterized in that: Both sides of the direct insertion pin are provided with direct insertion limit steps.