Radial lead capacitor holder

Abstract

The application discloses a radial lead capacitor fixing seat, which comprises a cup-shaped body with an open upper end for mounting a capacitor, mounting holes arranged on both sides of the cup-shaped body, an auxiliary positioning column inserted into a corresponding through-hole pad on a PCB through the mounting hole and welded and fixed, and a silica gel gasket arranged at the inner bottom of the cup-shaped body, wherein the silica gel gasket and the cup-shaped body are provided with pin holes, and the capacitor pins are inserted into the corresponding through-hole pad on the PCB through the pin holes and welded and fixed. Through the design of the cup-shaped body and the silica gel gasket, part of the vibration of the PCB and the capacitor can be absorbed, the vibration amplitude of the capacitor is reduced, the mounting and welding stress of the capacitor is reduced, and the working stability and service life of the capacitor in the application environment with high vibration and high component density are improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic component fixing devices, and more specifically, to a radial lead type capacitor fixing base. Background Technology

[0002] With the continuous development of electronic technology, capacitors, as fundamental electronic components, are widely used in various electronic devices. Radial lead capacitors, due to their structural characteristics and electrical performance, are particularly important in high-vibration environments such as aviation, airborne, missile-borne, and rocket-borne applications. However, in these special application environments, the way capacitors are installed and fixed directly affects the reliability and service life of the equipment.

[0003] However, the existing radial lead capacitor fixing methods still have the following problems: First, some radial lead electrolytic capacitors do not have a reliable insulating layer on the outer aluminum shell, which poses a risk of short circuit between the capacitor shell and the PCB copper foil and other nearby components in high-vibration, high-component-density application environments; Second, some radial lead capacitors are usually heavy and tall, and due to insulation requirements, the capacitor body usually needs to be raised 0.5 to 1 mm above the PCB board surface before soldering, which leads to the risk of metal fatigue breakage of the capacitor leads in high-vibration application environments; Finally, the use of glue for reinforcement or potting in the existing technology has disadvantages such as long curing time, generation of toxic gases, rapid aging, insufficient bonding strength, internal air bubble problems, and difficulty in rework.

[0004] Therefore, there is an urgent need for a radial lead capacitor mounting bracket that can effectively solve the above problems, ensuring the insulation performance between the capacitor and the PCB board and surrounding components, improving the mechanical stability of the capacitor in high vibration environments, and facilitating installation and maintenance. Utility Model Content

[0005] To address the risks of insulation short circuits, lead metal fatigue fractures, and shortcomings of existing reinforcement methods in radial lead electrolytic capacitors operating under high vibration and high component density environments, and to improve capacitor stability, service life, processing efficiency, and yield, this invention provides a radial lead capacitor mounting base.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to provide a radial lead type capacitor holder, comprising:

[0007] The cup-shaped body has an opening at the top for mounting a capacitor, and mounting holes are provided on both sides of the cup-shaped body;

[0008] The auxiliary positioning post is inserted into the corresponding through-hole pad on the PCB board through the mounting hole and then soldered to fix it.

[0009] A silicone pad is provided at the bottom of the cup-shaped body. The silicone pad and the cup-shaped body are provided with pin holes for the capacitor pins to pass through the pin holes and be inserted into the corresponding through-hole pads on the PCB board and soldered to fix them.

[0010] Optionally, both the silicone pad and the cup-shaped body have two pin holes, and the center-to-center spacing of the pin holes is the same as the center-to-center spacing of the capacitor pins.

[0011] Optionally, the cup-shaped body and the capacitor are assembled with positive tolerance.

[0012] Optionally, the auxiliary positioning post and the mounting holes of the cup-shaped body are tightly fitted.

[0013] Optionally, the auxiliary positioning post is made of tin-plated copper.

[0014] Optionally, the cup-shaped body is made of PEEK material.

[0015] Optionally, the lower end of the cup-shaped body also has an opening, forming a through hole coaxial with the upper opening, and the capacitor is installed in the through hole.

[0016] Optionally, the mounting holes are aligned with the corresponding through-hole pads on the PCB, while the pin holes on the silicone pad are offset from the corresponding through-hole pads on the PCB, and the offset direction of the pin holes on the silicone pad and the corresponding through-hole pads on the PCB is the same.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) The design of the silicone pad can absorb some of the vibration of the PCB board and the capacitor, reduce the vibration amplitude of the capacitor, reduce the welding stress of the capacitor installation, and improve the working stability and service life of the capacitor in the application environment of high vibration and high component density.

[0019] (2) By designing auxiliary positioning columns, fast and accurate positioning can be achieved during capacitor welding, thereby improving the consistency and yield rate in the processing and production process;

[0020] (3) Through the design of the cup-shaped body and silicone pad, there is no need to manually raise the capacitor to achieve insulation, which improves efficiency and yield.

[0021] (4) The cup-shaped body adopts a split structure with openings at both ends. The capacitor can be installed after the automated PCB insertion, reflow soldering, wave soldering and other processes are completed, without affecting the automated processing.

[0022] (5) The cup-shaped body is made of PEEK material, which has the characteristics of high temperature resistance, high mechanical strength, chemical corrosion resistance and aging resistance. It has low batch processing cost and good long-term application stability.

[0023] (6) It avoids problems such as air bubbles, expansion in low-pressure environments, shrinkage and deformation caused by chemical adhesive processes;

[0024] (7) Lightweight and simple structure, does not affect heat dissipation or repair.

[0025] (8) Through slightly staggered through-hole pads and lead holes, it makes close contact with the capacitor leads and has a squeezing and straightening effect on the capacitor leads. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of a radial lead capacitor mounting base according to an embodiment of this application.

[0027] Figure 2 This is a cross-sectional view of a radial lead capacitor mounting base with a base plate in a cup-shaped body according to an embodiment of this application.

[0028] Figure 3 This is a perspective view of a radial lead capacitor holder according to an embodiment of this application.

[0029] Figure label:

[0030] 1. Capacitor, 2. Cup-shaped body, 3. Auxiliary positioning post, 4. PCB board, 5. Silicone pad, 6. Pin, 7. First pin hole, 8. Second pin hole, 9. Through hole pad. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] Terminology Explanation:

[0033] Radial lead type: One of the main packaging forms of electronic components, referring to a cylindrical structure in which the lead wire is installed on the longitudinal axis of the cylinder.

[0034] Radial lead capacitor: A capacitor that uses a radial lead package is referred to as a capacitor in the following text.

[0035] Example 1

[0036] Please refer to Figure 1 , Figure 3 This embodiment provides a radial lead capacitor holder, including a cup-shaped body 2, an auxiliary positioning post 3, and a silicone pad 5.

[0037] The cup-shaped body 2 has a through hole for mounting the capacitor. The cup-shaped body is made of PEEK material, which has excellent high-temperature resistance, is not easily deformed in high-temperature environments, and also has good insulation properties and mechanical strength, effectively protecting the capacitor. Mounting holes are provided on both sides of the cup-shaped body for inserting auxiliary positioning posts 3. The inner diameter of the cup-shaped body 2 is slightly larger than the outer diameter of the capacitor 1, forming a positive tolerance assembly. This assembly method allows the capacitor 1 to be easily inserted into the cup-shaped body 2 while ensuring the stability of the capacitor within the cup-shaped body.

[0038] The auxiliary positioning posts are inserted into the through-hole pads on the PCB board through mounting holes on both sides of the cup-shaped main body and then soldered in place. The auxiliary positioning posts are made of tin-plated copper; copper has excellent electrical and thermal conductivity, and the tin plating improves soldering performance and prevents oxidation. The auxiliary positioning posts are tightly fitted into the mounting holes of the cup-shaped main body. This assembly method ensures that the auxiliary positioning posts are stable and do not loosen in the mounting holes, improving the overall stability of the mounting base. The diameter of the auxiliary positioning posts matches the inner diameter of the through-hole pads 9 on the PCB board, allowing for accurate positioning after insertion and secure fixation to the PCB board via soldering.

[0039] A silicone pad 5 is located at the bottom of the cup-shaped body. The silicone material has good elasticity and cushioning properties, reducing vibrations generated by the capacitor during operation. The silicone pad 5 has a second lead hole 8 for the capacitor leads to pass through, and the second lead hole 8 corresponds to the position of the through-hole pad 9 on the PCB board 4. The silicone pad has a moderate thickness, providing sufficient cushioning without affecting the capacitor's mounting height.

[0040] The silicone pad has two pin holes, and the center-to-center spacing of the pin holes is the same as that of the capacitor pins. This design ensures that the capacitor pins can pass smoothly through the second pin hole 8 of the silicone pad and be accurately inserted into the corresponding through-hole pad 9 on the PCB. The diameter of the second pin hole 8 is slightly larger than the diameter of the capacitor pins, allowing the pins to pass through unobstructed.

[0041] However, this application does not exclude the possibility that the cup-shaped body has a base plate, such as Figure 2 As shown, a first pin hole 7 can be opened at its bottom, and the pin can pass through the first pin hole 7 and the second pin hole 8 and enter the through hole pad 9 of the PCB board.

[0042] The working principle of the radial lead capacitor holder in this embodiment is as follows: First, a silicone pad is placed inside the bottom of the cup-shaped body. Then, the capacitor is inserted from the top of the through hole in the cup-shaped body, so that the capacitor leads pass through the second lead hole 8 of the silicone pad. Next, auxiliary positioning posts are inserted into the mounting holes on both sides of the cup-shaped body to form a tight fit. Finally, the entire capacitor holder is placed on the PCB board 4, so that the capacitor leads and auxiliary positioning posts are respectively inserted into the corresponding through hole pads on the PCB board and fixed by soldering.

[0043] The radial lead capacitor mount of this embodiment has the following advantages: the cup-shaped body protects the capacitor from external damage; the silicone pad reduces the impact of vibration on the capacitor; the auxiliary positioning posts improve the stability of the mount on the PCB board; and the rationally designed pin holes ensure accurate positioning of the capacitor pins. These designs make the capacitor mounting on the PCB board more stable and reliable, extend the capacitor's lifespan, and improve the reliability of electronic equipment.

[0044] Example 2

[0045] The radial lead capacitor holder provided in this embodiment is basically the same as that in Embodiment 1, except that the auxiliary positioning post is made of nickel-plated brass. Nickel-plated brass has good conductivity and oxidation resistance, making it more suitable for use in certain special environments.

[0046] Example 3

[0047] The radial lead capacitor holder provided in this embodiment is basically the same as that in Embodiment 1, except that the cup-shaped body and the capacitor are assembled with an interference fit. This assembly method makes the capacitor more stable within the cup-shaped body and is suitable for working environments with high vibration.

[0048] Example 4

[0049] The radial lead capacitor holder provided in this embodiment is basically the same as that in Embodiment 1, except that the cup-shaped body 2 is provided with heat dissipation holes (not shown). The heat dissipation holes can promote air circulation and improve heat dissipation efficiency, making it suitable for applications where the capacitor operates at a high temperature.

[0050] Example 5

[0051] The radial lead capacitor holder provided in this embodiment is basically the same as that in Embodiment 1, except that a reinforcing rib (not shown) is provided on the outer side of the cup-shaped body. The reinforcing rib can improve the mechanical strength of the cup-shaped body and prevent deformation during installation or use.

[0052] Example 6

[0053] The radial lead capacitor holder provided in this embodiment is basically the same as that in Embodiment 1, except that the inner diameter of the second pin hole 8 on the silicone pad 5 and the corresponding through-hole pad 9 on the PCB board are both slightly larger than the outer diameter of the pin 6, for example, by 1 mm, to facilitate installation. Because there are gaps between the second pin hole 8 and the through-hole pad 9, the pin 6 passing through the through-hole pad 9 is prone to wobbling, which is detrimental to soldering operations.

[0054] Therefore, the mounting holes on both sides of the cup-shaped body are aligned with the corresponding through-hole pads 9 on the PCB board, while the second pin holes 8 on the silicone pad 5 are slightly offset from the corresponding through-hole pads 9 on the PCB board, for example, by 1mm, and the offset direction of the two second pin holes 8 and the corresponding through-hole pads 9 on the PCB board is consistent. During installation, first align the second pin holes 8 on the silicone pad 5 with the corresponding through-hole pads 9 on the PCB board. This will offset the mounting holes on both sides of the cup-shaped body from the through-hole pads 9 on the PCB board, allowing the capacitor leads to easily pass through the second pin holes 8 and the corresponding through-hole pads 9 on the PCB board. Then, move the mounting base to align the mounting holes on both sides of the cup-shaped body with the through-hole pads 9 on the PCB board, and then insert the auxiliary positioning post. At this time, the second pin holes 8 and the through-hole pads 9 on the PCB board will be offset again, thus providing a certain squeezing and straightening effect on the leads, making the leads more firmly inserted into the through-hole pads 9, facilitating subsequent soldering and fixing.

[0055] In the case where the cup-shaped body has a base plate, the first pin hole 7 on the base plate and the second pin hole 8 of the silicone pad 5 are set in the same way, and will not be described in detail here.

[0056] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications all fall within the protection scope of the claims of this utility model.

Claims

1. A radial lead type capacitor holder, characterized in that, include: The cup-shaped body has an opening at the top for mounting a capacitor, and mounting holes are provided on both sides of the cup-shaped body; The auxiliary positioning post is inserted into the corresponding through-hole pad on the PCB board through the mounting hole and then soldered to fix it. A silicone pad is provided at the bottom of the cup-shaped body. The silicone pad and the cup-shaped body are provided with pin holes for the capacitor pins to pass through the pin holes and be inserted into the corresponding through-hole pads on the PCB board and soldered to fix them.

2. The radial lead capacitor holder according to claim 1, characterized in that, Both the silicone pad and the cup-shaped body have two pin holes, and the center-to-center spacing of the pin holes is the same as the center-to-center spacing of the capacitor pins.

3. The radial lead capacitor holder according to claim 1, characterized in that, The cup-shaped body and the capacitor are assembled with positive tolerance.

4. The radial lead capacitor holder according to claim 1, characterized in that, The auxiliary positioning post and the mounting holes of the cup-shaped body are tightly fitted.

5. The radial lead capacitor holder according to claim 1, characterized in that, The auxiliary positioning post is made of tin-plated copper.

6. The radial lead capacitor holder according to claim 1, characterized in that, The cup-shaped body is made of PEEK material.

7. The radial lead capacitor holder according to claim 1, characterized in that, The lower end of the cup-shaped body also has an opening, which forms a coaxial through hole with the upper opening, and the capacitor is installed in the through hole.

8. The radial lead capacitor holder according to claim 7, characterized in that, The mounting holes are aligned with the corresponding through-hole pads on the PCB, while the pin holes on the silicone pad are offset from the corresponding through-hole pads on the PCB, and the offset direction of the pin holes on the silicone pad and the corresponding through-hole pads on the PCB is the same.

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