Spring PIN welding limiting tool
By designing a spring PIN welding limiting fixture, the problem of low alignment accuracy of spring PIN welding on PCBA boards was solved, achieving high-precision and high-efficiency welding, and improving welding quality and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-13
AI Technical Summary
Existing PCBA board spring PIN soldering suffers from low alignment accuracy, easy tilting, and platform height issues, resulting in unstable soldering quality, affecting product quality, and increasing maintenance costs.
Design a spring pin welding limiting fixture, including components such as a carrier plate, limiting block, limiting pin and locking block. Through the cooperation of the countersink, limiting hole and pressure plate, the spring pin is accurately positioned and firmly clamped to ensure welding quality.
It improves welding stability and yield, reduces scrap rate and maintenance costs, and meets the requirements for high-precision and high-efficiency welding.
Smart Images
Figure CN223989211U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of spring PIN welding technology, specifically relating to a spring PIN welding limiting tool. Background Technology
[0002] The design of this PCBA board spring PIN soldering fixture stems from the urgent need in the electronics manufacturing industry for high-precision, high-efficiency soldering processes. As electronic products become increasingly miniaturized and high-density, the spring PINs (elastic contact terminals) on PCBA boards, due to their small size and complex structure, face challenges with traditional manual soldering, including low alignment accuracy, susceptibility to cold solder joints or misalignment, leading to decreased yield and increased rework costs. Especially in multi-variety, small-batch production, the instability of manual operation makes it difficult to meet consistency requirements.
[0003] The existing wave soldering fixture is a standard wave soldering fixture, made of rectangular synthetic stone with multiple holes cut into it to hold PCBA components before wave soldering. During wave soldering, the spring pins may tilt or become uneven, causing interference when assembling the product with the casing, making assembly impossible, affecting product quality, and increasing maintenance and labor costs. This existing fixture lacks any preventative or error-proof protection and does not adequately guarantee soldering quality.
[0004] To address the aforementioned issues, this application proposes a spring PIN welding limiting fixture. Utility Model Content
[0005] To address the aforementioned problems in the existing technology, this utility model provides a spring pin welding limiting fixture, which improves the stability of the circuit board and the spring pin, as well as the stability of the fixture itself.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a spring pin welding limiting fixture, comprising a carrier plate for placing a circuit board, wherein the carrier plate has a recessed groove of the same height as the circuit board, the upper end of the carrier plate has a limiting block for positioning the spring pin on the circuit board, the limiting block has a limiting hole for accommodating the spring pin, the bottom of the limiting block has a limiting pin for inserting into a mounting hole in the circuit board, wherein when the limiting block is placed on the circuit board, at least part of the tip of the spring pin protrudes from the limiting block, the upper end of the limiting block has a pressure plate for pressing the spring pin against the circuit board through the protruding part, and the carrier plate has a locking block that is damped and rotatably connected to position the recessed groove or the recessed groove and the pressure plate in the carrier plate alone or simultaneously.
[0007] As a preferred embodiment of this utility model, at least two limiting pins are provided corresponding to the mounting holes.
[0008] As a preferred technical solution of this utility model, the locking block includes a first locking plate that is rotatably mounted in the carrier plate via a shaft, and the bottom of the first locking plate is flush with the top of the circuit board after it enters the sink.
[0009] As a preferred technical solution of this utility model, the locking block further includes a second locking plate distributed circumferentially with the first locking plate and a third locking plate extending and fixed on the second locking plate, wherein the bottom of the third locking plate is flush with the top of the pressure plate and the limiting block after they are attached.
[0010] As a preferred technical solution of this utility model, a limiting seat is fixed inside the carrier plate, a limiting groove is formed on the limiting seat, and an angle block that moves in the limiting groove is fixed at the bottom of the shaft.
[0011] As a preferred embodiment of this utility model, a damping plate is provided at the bottom of the shaft, and a spring is provided on the inner side of the damping plate and the limiting seat to abut against each other.
[0012] As a preferred technical solution of this utility model, the carrier plate is provided with a plate-retrieving groove that communicates with the settling tank.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This utility model uses a recessed groove for precise positioning of the circuit board. The limiting hole and limiting pin on the limiting block cooperate with the spring pin and the mounting hole respectively to prevent the spring pin from tilting, thereby ensuring the welding quality and reducing the scrap rate.
[0015] This utility model uses a pressure plate on the limiting block to press the spring pin against the circuit board, preventing the spring pin from lifting after welding and improving product quality. At the same time, the locking block can position the circuit board separately or simultaneously position the circuit board and the pressure plate on the carrier plate, ensuring the stability of the overall tooling after positioning. Attached Figure Description
[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0017] Figure 1 This is a schematic diagram of the structure of the present invention when the circuit board is placed in the sink and locked by the locking block, and the limiting block is placed at the same time.
[0018] Figure 2 for Figure 1 A schematic diagram showing the structure when the middle limit block is placed and the pressure plate covers it, while the locking block simultaneously locks the circuit board and the pressure plate.
[0019] Figure 3This is a structural diagram of the carrier plate and locking block;
[0020] Figure 4 This is a schematic diagram of the connection between the locking block and the limiting seat;
[0021] In the diagram: 1. Carrier plate; 11. Sink; 12. Plate taking slot; 2. Limiting block; 21. Limiting hole; 22. Limiting pin; 3. Pressure plate; 4. Locking block; 41. First locking plate; 42. Second locking plate; 43. Third locking plate; 44. Shaft; 441. Angle block; 5. Limiting seat; 51. Limiting groove; 6. Damping plate; 61. Spring; 7. Circuit board; 71. Mounting hole; 72. Spring pin. Detailed Implementation
[0022] 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. Example
[0023] Please see Figures 1-4 This utility model provides the following technical solution: a spring pin welding limiting fixture, including a carrier plate 1 for placing a circuit board 7, a recess 11 with the same height as the circuit board 7 in the carrier plate 1, a limiting block 2 for positioning the spring pin 72 on the circuit board 7 at the upper end of the carrier plate 1, a limiting hole 21 for accommodating the spring pin 72 in the limiting block 2, and a limiting pin 22 for inserting into the mounting hole 71 in the circuit board 7 at the bottom of the limiting block 2. When the limiting block 2 is placed on the circuit board 7, the spring pin 72 is positioned at the top. At least one part of the end protrudes from the limiting block 2. The upper end of the limiting block 2 is provided with a pressure plate 3 that presses the spring pin 72 and the circuit board 7 together through the protruding part. The carrier plate 1 is connected by a damping rotation to a locking block 4 that can position the sink 11 alone or simultaneously the sink 11 and the pressure plate 3 in the carrier plate 1. When the locking block 4 positions the circuit board 7 alone, it prevents the circuit board 7 from falling out of the sink 11. At the same time, it avoids the cooperation between the limiting block 2 and the pressure plate 3. When the locking block 4 limits the circuit board 7 and the pressure plate 3 at the same time, it ensures the overall structural stability of the tooling.
[0024] Specifically, at least two limit pins 22 are provided corresponding to the mounting holes 71. The mounting holes 71 are holes that are built into the circuit board 7. The position of the limit pins 22 corresponds to the mounting holes 71 to form a positioning, which prevents the spring pins 72 from tilting on the circuit board 7. The two mounting holes 71 can ensure the reliability of positioning.
[0025] Specifically, the locking block 4 includes a first locking plate 41 rotatably mounted in the carrier plate 1 via a shaft 44. The bottom of the first locking plate 41 is flush with the top of the circuit board 7 after it enters the recess 11, such as... Figure 1 The first locking plate 41 shown is in a state of pressing the carrier plate 1 to prevent the circuit board 7 from not being placed in place or from coming off.
[0026] Specifically, the locking block 4 also includes a second locking plate 42 circumferentially distributed with the first locking plate 41 and a third locking plate 43 extending and fixed to the second locking plate 42. The bottom of the third locking plate 43 is flush with the top of the pressure plate 3 and the limiting block 2 after they are attached. Figure 2 The second locking plate 42 and the third locking plate 43 shown are respectively in the state of pressing the sink 11 and the pressure plate 3 to ensure the stability of the overall tooling.
[0027] Specifically, a limiting seat 5 is fixed inside the carrier plate 1, and a limiting groove 51 is opened on the limiting seat 5. An angle block 441 that moves in the limiting groove 51 is fixed at the bottom of the shaft 44. The rotation range of the locking block 4 is limited by the cooperation between the limiting groove 51 and the angle block 441, thereby improving the ease of use of the locking block 4.
[0028] Specifically, a damping plate 6 is provided at the bottom of the shaft 44. The damping plate 6 and the inner side of the limiting seat 5 are provided with springs 61 that abut against each other. The spring force of the spring 61 presses the damping plate 6 and the shaft 44 together, thereby forming damping for the locking block 4 to rotate in the carrier plate 1. The damping can also be replaced by rubber extrusion blocks, spring sheets, etc.
[0029] Specifically, the carrier board 1 has a board removal slot 12 for facilitating the removal of the circuit board 7 from the sink 11, and the board removal slot 12 is interconnected with the sink 11.
[0030] The working principle and usage process of this utility model are as follows: Figure 3 The diagram shows the tooling in its unloaded state. At this time, the locking block 4 is positioned above the recess 11 on its side. The circuit board 7 is placed in the recess 11, and the locking block 4 is rotated so that the first locking plate 41 forms a barrier on the upper surface of the circuit board 7. Figure 1 As shown, the spring pin 72 is inserted into the corresponding hole of the circuit board 7, the limiting block 2 is attached to the upper surface of the circuit board 7, the spring pin 72 passes through the limiting hole 21, and the limiting pin 22 is inserted into the mounting hole 71 on the circuit board 7. The limiting blocks 2 are placed in sequence. After completion, the pressure plate 3 is placed on the upper surface of the limiting block 2. The pressure plate 3 presses the spring pin 72 protruding from the limiting block 2 against the circuit board 7. The locking block 4 is rotated again so that the second locking plate 42 blocks the upper end of the circuit board 7 and the third locking plate 43 blocks the upper end of the pressure plate 3. At this time, even if the fixture shakes slightly, it will not affect the positioning effect of the circuit board 7 and the spring pin 72.
[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A spring PIN soldering limiting tool, comprising a carrier plate (1) for placing a circuit board (7), characterized in that: The carrier plate (1) is provided with a sink (11) with the same height as the circuit board (7), the carrier plate (1) is provided with a limiting block (2) for positioning the spring needle (72) on the circuit board (7), the limiting block (2) is provided with a limiting hole (21) for accommodating the spring needle (72), the limiting block (2) is provided with a limiting pin (22) for inserting into the mounting hole (71) of the circuit board (7), when the limiting block (2) is placed on the circuit board (7), the top of the spring needle (72) is at least partially protruding from the limiting block (2), the limiting block (2) is provided with a pressing plate (3) for pressing the spring needle (72) and the circuit board (7) through the protruding part, the carrier plate (1) is provided with a lock block (4) for positioning the sink (11) or the sink (11) and the pressing plate (3) in the carrier plate (1) through damping rotation.
2. The spring PIN welding limiting tool according to claim 1, characterized in that: The limiting pin (22) is provided with at least two corresponding mounting holes (71).
3. The spring PIN welding stopper tooling of claim 1, wherein: The lock block (4) includes a first lock plate (41) rotatably mounted in the carrier plate (1) through a shaft (44), and the bottom of the first lock plate (41) is flush with the top after the circuit board (7) enters the sink (11).
4. The spring PIN welding stopper tooling of claim 3, wherein: The lock block (4) further includes a second lock plate (42) and a third lock plate (43) extending and fixed on the second lock plate (42), the bottom of the third lock plate (43) is flush with the top after the pressing plate (3) and the limiting block (2) are attached.
5. The spring PIN welding stopper tooling of claim 3, wherein: The carrier plate (1) is internally fixed with a limiting seat (5), the limiting seat (5) is provided with a limiting groove (51), and the bottom of the shaft (44) is fixed with an angle block (441) movably arranged in the limiting groove (51).
6. The spring PIN welding stopper tooling of claim 5, wherein: The bottom of the shaft (44) is provided with a damping plate (6), and the damping plate (6) and the inner side of the limiting seat (5) are provided with springs (61) abutting each other.
7. The spring PIN welding stopper tooling of claim 1, wherein: The carrier plate (1) is provided with a plate taking groove (12) communicating with the sink (11).