A through-hole reflow pad structure

Abstract

This utility model relates to the field of electronic device manufacturing technology and discloses a through-hole reflow pad structure, including a PCB pad, PCB pins, and a PCB back hole. Component pins are detachably connected to the PCB pins and the PCB back hole. Multiple positioning holes are provided at the bottom of the PCB pad, and a fixing plate is detachably connected to the bottom of the PCB pad. An elastic component is disposed inside the fixing plate, and a sealing ring is slidably connected inside the fixing plate. An upper guide plate is fixedly connected to the top of the sealing ring, and a lower guide plate is fixedly connected to the bottom of the sealing ring. The elastic component includes multiple connecting posts. This utility model provides buffering and elastic fixation during component pin insertion, accommodating pin insertion and stabilizing the pin after insertion, ensuring connection stability and overall structural stability of the device.

Description

Technical Field

[0001] This utility model relates to the field of electronic device manufacturing technology, and in particular to a through-hole reflow pad structure. Background Technology

[0002] In the field of electronic equipment manufacturing, through-hole reflow soldering is widely used to achieve electrical connection and mechanical fixation between component leads and PCB pads. This process requires component leads to be precisely inserted into the corresponding holes of the pads and remain stable during the soldering process to ensure soldering quality and electrical performance.

[0003] In existing technologies, some through-hole reflow pad structures typically employ a simple via mating method when mounting component leads, relying solely on the gap between the pad diameter and the lead size for initial positioning. During lead insertion, the lack of effective buffering and elastic fixing structures makes the leads susceptible to deformation or insertion position misalignment due to external impacts, affecting soldering accuracy. Furthermore, uneven force on the leads during insertion can damage the pads, reducing product yield. Therefore, to address these issues, a through-hole reflow pad structure is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a through-hole reflow pad structure, which aims to improve the existing technology where, during the pin insertion process, the lack of an effective buffer and elastic fixing structure makes it easy for external impacts to cause pin deformation or insertion position displacement, affecting soldering accuracy; at the same time, uneven force on the pins during insertion can cause pad damage and reduce product yield.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A through-hole reflow pad structure includes a PCB pad, wherein PCB pins are formed inside the PCB pad, and a PCB back hole is formed inside the PCB pad. Component pins are detachably connected to the PCB pins and the PCB back hole. Multiple positioning holes are formed at the bottom of the PCB pad. A fixing plate is detachably connected to the bottom of the PCB pad. An elastic component is provided inside the fixing plate. A sealing ring is slidably connected inside the fixing plate. An upper guide plate is fixedly connected to the top of the sealing ring, and a lower guide plate is fixedly connected to the bottom of the sealing ring.

[0007] As a further description of the above technical solution:

[0008] The elastic component includes multiple connecting posts. The external part of the connecting posts is fixedly connected to the side of the sealing ring near the fixed plate. The fixed plate has multiple cavities inside. A rubber post is fixedly connected to one side of the cavity. A limit plate is fixedly connected to the other side of the rubber post. The other side of the limit plate is fixedly connected to the side of the connecting post away from the sealing ring. A spring is sleeved on the outside of the rubber post.

[0009] As a further description of the above technical solution:

[0010] The fixing plate has multiple insertion holes inside, and a positioning pin is detachably connected inside the insertion hole. The positioning pin is detachably connected to the inside of the positioning hole.

[0011] As a further description of the above technical solution:

[0012] The aperture of the PCB pin is 1.0-2.0 mm larger than the component pin, and the aperture of the back of the PCB is 0.2-0.5 mm larger than the component pin.

[0013] As a further description of the above technical solution:

[0014] The component pins are externally slidably connected to the inner walls of the upper and lower guide plates;

[0015] As a further description of the above technical solution:

[0016] One end of the spring is fixedly connected to the inner wall of the cavity, and the other end of the spring is fixedly connected to the side of the limiting plate away from the connecting post.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, the sealing ring slides within the fixed plate by cooperating with the spring, rubber column and connecting column in the elastic component, thereby providing buffer and elastic fixation when the component pin is inserted. This not only adapts to the pin insertion action, but also stabilizes the pin after insertion, ensuring connection stability.

[0019] 2. In this utility model, the combination of positioning pins, positioning holes and insertion holes drives the fixing plate to be accurately installed at the bottom of the PCB pad, thereby ensuring the stability of the overall structure of the device and making the relative positions of each component accurate during operation, which is conducive to the normal functioning of the entire through hole reflow pad structure. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a through-hole reflow pad structure proposed in this utility model;

[0021] Figure 2This is a schematic diagram of the PCB pin structure of a through-hole reflow pad proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the positioning hole of a through-hole reflow pad structure proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of a through-hole reflow pad fixing plate proposed in this utility model;

[0024] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0025] Legend:

[0026] 1. PCB pads; 2. PCB pins; 3. PCB back hole diameter; 4. Component pins; 5. Positioning holes; 6. Fixing plate; 7. Cavity; 8. Rubber pillars; 9. Limiting plate; 10. Connecting pillars; 11. Sealing ring; 12. Spring; 13. Upper guide plate; 14. Lower guide plate; 15. Insertion hole; 16. Positioning pin. Detailed Implementation

[0027] 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.

[0028] Reference Figures 1 to 3 This utility model provides an embodiment of a through-hole reflow pad structure, including a PCB pad 1, which serves as the basic carrier of the entire structure, providing mounting positions for other components and carrying and realizing the electrical connection function with component pins 4. The pad 1 has PCB pins 2 inside, providing an insertion channel for component pins 4. The aperture of the aperture is larger than the component pins 4 by 1.0-2.0 mm, facilitating the smooth insertion of component pins 4 while ensuring a certain installation accuracy and electrical connection space. A PCB back aperture 3 is also provided, which cooperates with the PCB pins 2 to provide a channel for component pins 4 to be inserted from the back of the PCB pad 1. The aperture of the back aperture is larger than the component pins 4 by 0.2-0.5 mm, assisting in the accurate installation and electrical connection of component pins 4.

[0029] The PCB pin 2 and the PCB back hole 3 are detachably connected to the component pin 4, which is used to realize the electrical connection with the PCB pad 1. It is a key component for signal and power transmission between electronic components and the circuit board. It is installed and fixed by cooperating with the PCB pin 2 and the PCB back hole 3. The opening diameter of the PCB pin 2 is larger than the component pin 4 by 1.0-2.0 mm, and the opening diameter of the PCB back hole 3 is larger than the component pin 4 by 0.2-0.5 mm. The bottom of the PCB pad 1 has multiple positioning holes 5, which are used to cooperate with the positioning pins 16 to determine the accurate installation position of the fixing plate 6 on the bottom of the PCB pad 1, so as to ensure the structural stability of the whole device and the accuracy of the relative position of each component.

[0030] Reference Figures 4 to 5 A fixing plate 6 is detachably connected to the bottom of the PCB pad 1. It is installed at the bottom of the PCB pad 1 to provide installation support for components such as the elastic component and the sealing ring 11, and plays a role in stabilizing and protecting the internal structure. At the same time, it cooperates with the positioning pin 16 and the positioning hole 5 to further enhance the overall stability of the device. The fixing plate 6 is equipped with an elastic component, which includes multiple connecting posts 10. One end is fixedly connected to the side of the sealing ring 11 near the fixing plate 6, and the other end is connected to the limiting plate 9. When the component pin 4 is inserted, it transmits pressure, drives the sealing ring 11 to move, and plays a role in force transmission and structural connection in the elastic component.

[0031] The connecting column 10 is externally fixedly connected to the sealing ring 11 on the side near the fixing plate 6. The fixing plate 6 has multiple cavities 7 inside, which provide installation space for elastic components such as rubber columns 8, springs 12, and limiting plates 9, ensuring that the components of the elastic components are arranged in an orderly manner and work normally. A rubber column 8 is fixedly connected to one side of the cavity 7. It is elastic and, together with the spring 12, plays a buffering and elastic support role when the component pin 4 is inserted, absorbing and buffering external forces and protecting the internal structure of the device.

[0032] A limiting plate 9 is fixedly connected to the other side of the rubber column 8. One side is connected to the rubber column 8, and the other side is connected to the connecting column 10. This plate restricts the movement range of the connecting column 10, ensuring that the elastic component works within a reasonable range of elastic deformation. It also assists in transmitting force. The other side of the limiting plate 9 is fixedly connected to the side of the connecting column 10 away from the sealing ring 11. A spring 12 is sleeved on the outside of the rubber column 8. One end is fixed to the inner wall of the cavity 7, and the other end is fixed to the limiting plate 9. When the component pin 4 is inserted, it undergoes elastic deformation, providing elastic force to achieve elastic fixation of the component pin 4 and ensure connection stability.

[0033] One end of the spring 12 is fixedly connected to the inner wall of the cavity 7, and the other end of the spring 12 is fixedly connected to the side of the limiting plate 9 away from the connecting post 10. A sealing ring 11 is slidably connected inside the fixing plate 6 and slides inside the fixing plate 6. The upper guide plate 13 at the top and the lower guide plate 14 at the bottom are slidably connected to the outside of the component pin 4, which plays a guiding and sealing role, ensuring that the component pin 4 is accurately inserted, and preventing external impurities from entering the device and affecting its performance.

[0034] An upper guide plate 13 is fixedly connected to the top of the sealing ring 11 and slides externally with the component pin 4, providing a guiding function for the insertion of the component pin 4 and ensuring the accuracy of its insertion direction. A lower guide plate 14 is fixedly connected to the bottom of the sealing ring 11 and slides externally with the component pin 4, cooperating with the upper guide plate 13 to further ensure the stability and accuracy of the component pin 4 during the insertion process.

[0035] The external of component pin 4 is slidably connected to the inner wall of the upper guide plate 13 and the lower guide plate 14. The interior of the fixing plate 6 has multiple insertion holes 15 for inserting positioning pins 16. These pins 16 cooperate with the positioning holes 5 and the positioning pins 16 to achieve accurate installation and fixation of the fixing plate 6 on the bottom of the PCB pad 1. The positioning pins 16 are detachably connected inside the insertion holes 15. Inserting them into the insertion holes 15 and the positioning holes 5 serves to position and fix the fixing plate 6 firmly connected to the bottom of the PCB pad 1, ensuring the stability of the entire device structure and the accurate relative positions of each component. The external of the positioning pins 16 is detachably connected to the interior of the positioning holes 5.

[0036] Working principle: Align the component pin 4 with the PCB pin 2 on the PCB pad 1 and the PCB back hole 3. Due to the size fit, the component pin 4 can be smoothly inserted. During this process, the outer side of the component pin 4 will slide against the inner wall of the upper guide plate 13 and the lower guide plate 14. The upper guide plate 13 and the lower guide plate 14 act as guides to ensure that the component pin 4 can be accurately inserted into the corresponding position. When the component pin 4 is inserted, it will exert a certain pressure on the sealing ring 11. The sealing ring 11 is connected to the elastic component through the connecting post 10. Under the pressure, the connecting post 10 will compress the spring 12 and squeeze the rubber post 8. One end of the spring 12 is fixedly connected to the inner wall of the cavity 7, and the other end is fixedly connected to the side of the limiting plate 9 away from the connecting post 10. The rubber post 8 also has a certain degree of elasticity. Together, they play the role of buffering and elastic support, allowing the sealing ring 11 to slide within a certain range to adapt to the insertion action of the component pin 4, and providing a certain elastic fixing force after insertion. When installing the fixing plate 6, the positioning pin 16 is inserted into the insertion hole 15 of the fixing plate 6, and then the positioning pin 16 is aligned with the positioning hole 5 at the bottom of the PCB pad 1 to connect and fix the fixing plate 6 to the PCB pad 1. The cooperation of the positioning pin 16 with the positioning hole 5 and the insertion hole 15 ensures the accurate installation position of the fixing plate 6 at the bottom of the PCB pad 1, making the structure of the entire device more stable.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A through-hole reflow pad structure, comprising a PCB pad (1), characterized in that: The PCB pad (1) has PCB pins (2) inside and PCB back hole (3) inside. Component pins (4) are detachably connected to the PCB pins (2) and PCB back hole (3). Multiple positioning holes (5) are opened at the bottom of the PCB pad (1). A fixing plate (6) is detachably connected to the bottom of the PCB pad (1). An elastic component is provided inside the fixing plate (6). A sealing ring (11) is slidably connected inside the fixing plate (6). An upper guide plate (13) is fixedly connected to the top of the sealing ring (11). A lower guide plate (14) is fixedly connected to the bottom of the sealing ring (11).

2. The through-hole reflow pad structure according to claim 1, characterized in that: The elastic component includes multiple connecting posts (10). The external part of the connecting post (10) is fixedly connected to the sealing ring (11) on the side near the fixing plate (6). The fixing plate (6) has multiple cavities (7) inside. A rubber post (8) is fixedly connected to one side of the cavity (7). A limiting plate (9) is fixedly connected to the other side of the rubber post (8). The other side of the limiting plate (9) is fixedly connected to the side of the connecting post (10) away from the sealing ring (11). A spring (12) is sleeved on the outside of the rubber post (8).

3. The through-hole reflow pad structure according to claim 1, characterized in that: The fixing plate (6) has multiple insertion holes (15) inside. The insertion holes (15) are detachably connected to the inside of a positioning pin (16). The positioning pin (16) is detachably connected to the inside of a positioning hole (5).

4. The through-hole reflow pad structure according to claim 1, characterized in that: The aperture of the PCB pin (2) is 1.0-2.0 mm larger than that of the component pin (4), and the aperture of the PCB back hole (3) is 0.2-0.5 mm larger than that of the component pin (4).

5. The through-hole reflow pad structure according to claim 1, characterized in that: The external sliding connection of the component pin (4) is to the inner wall of the upper guide plate (13) and the lower guide plate (14).

6. The through-hole reflow pad structure according to claim 2, characterized in that: One end of the spring (12) is fixedly connected to the inner wall of the cavity (7), and the other end of the spring (12) is fixedly connected to the side of the limiting plate (9) away from the connecting post (10).

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