Integrated fuzz button

Abstract

The utility model discloses an integrated fuzz button, belongs to the technical field of fuzz button connectors, and solves the problem that signal integrity is reduced due to the fact that an existing fuzz button connector has a plurality of contact surfaces and is prone to pseudo soldering. The fastener comprises a fixing cap and a fuzz button, the fixing cap is of a cylindrical structure with a connecting hole in the top, and one end of the fuzz button is fixed in the connecting hole. The fuzz button is small in size and high in reliability, the fixing cap and the fuzz button are integrated into an integrated structure, the number of contact surfaces is effectively reduced, complexity of a signal transmission path is reduced, signal propagation delay is reduced, and signal integrity is improved.

Description

Technical Field

[0001] This utility model relates to the field of button connector technology, specifically to an integrated button. Background Technology

[0002] In the vertical interconnection between circuit boards, the button connector, as a new type of contact, has been increasingly widely used due to its low profile and high density.

[0003] A button connector consists of two buttons and a retaining cap. The two buttons are positioned within the mounting holes of the base, and both ends are locked in place by the retaining cap, achieving good RF and low-frequency connectivity. Currently, button connectors are commonly used in applications where signal and current transmission is achieved through a "retaining cap-button-button-retaining cap" configuration, facilitating signal transmission between circuit boards. However, button connectors are not only bulky, but also create multiple contact surfaces due to the contact between the circuit board and the retaining cap, between the buttons themselves, and between the buttons and the retaining cap. These multiple contact surfaces increase the signal transmission path, increase signal propagation delay, and affect signal integrity. Furthermore, during the soldering process between the retaining cap and the circuit board, solder creep can easily cause poor contact, leading to cold solder joints and impacting signal transmission.

[0004] To address the issues of large size and numerous contact surfaces, invention patent CN110190446B discloses a button connector and a method for manufacturing a button connector. The button connector includes a connecting conductor and a button. The connecting conductor is a solid cylindrical structure, and the button is soldered to one end face of the connecting conductor. In use, the connecting conductor contacts one printed circuit board, and the button contacts another. Although this invention integrates the button and connecting conductor through soldering, the contact area between the button's filaments or fibers and the conductor is small. When soldering the button and connecting conductor, it is difficult to form a good solder joint. The solder may not evenly cover all the filaments, leading to poor contact or potential breaks at the solder joint, still affecting signal integrity. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides an integrated wool button, which solves the problem of reduced signal integrity caused by the presence of multiple contact surfaces and the susceptibility to poor soldering in existing wool button connectors.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A one-piece wool button is provided, comprising: a fixing cap, which is a cylindrical structure with a connecting hole at the top, the bottom surface of the fixing cap being a welding surface for soldering to a first circuit board, the outer wall of the fixing cap being interference-fitted with a mounting hole on a base, a limiting boss being provided on the outer wall of the fixing cap, and a groove being provided at the connection between the limiting boss and the outer wall; and a wool button, one end of which is fixed in the connecting hole, and the other end of which is used to pass through the mounting hole and contact a second circuit board.

[0008] In this solution, by integrating the fixing cap and the button into a single structure, the number of contact surfaces is effectively reduced. The number of contact surfaces is reduced from "circuit board-fixing cap," "fixing cap-button," "button-button," "button-fixing cap," and "fixing cap-circuit board" to "first circuit board-fixing cap" and "button-second circuit board." This improves signal integrity, effectively reduces costs, and lowers the risk of poor contact. Furthermore, the soldering contact between the bottom of the fixing cap and the first circuit board is more reliable. During soldering, molten solder has a certain fluidity and can spread upwards along the conductor or metal surface due to capillary action; this phenomenon is called solder creep. If solder creep is not controlled, it may lead to a decrease in solder joint quality or other reliability issues. The groove in this solution acts as a physical barrier, preventing the molten solder from directly spreading upwards and thus increasing the soldering strength and ensuring effective signal transmission.

[0009] Furthermore, the fixing cap is pressed and secured to the button via a connecting hole. This pressing method ensures a more robust connection between the button and the fixing cap, avoiding the potential for incomplete soldering that can occur with traditional welding methods. This enhances the reliability of the connection and guarantees excellent electrical contact performance.

[0010] Furthermore, the top of the outer wall of the fixing cap is provided with four corner crimp pleats at the connection point with the button, and each corner crimp pleat has outward protruding pleats around its perimeter. The four corner crimp pleats are formed when the fixing cap and the button are crimped together. The four corner crimp pleats not only improve the mechanical connection strength between the button and the fixing cap, but also increase the connection strength between the fixing cap and the mounting hole of the base.

[0011] Furthermore, the maximum diagonal length on the four corner press-fit pleats is less than or equal to the outer diameter of the outer wall of the fixing cap.

[0012] Furthermore, the groove is arranged in a ring shape on the outer wall of the fixing cap.

[0013] Furthermore, the height of the fleece button is 1.5 to 2 times the height of the fixing cap. This height design ensures that the fleece button has sufficient length to extend onto the second circuit board to establish effective electrical contact.

[0014] Furthermore, the material of the wool button is conductive metal wire or conductive fiber.

[0015] This utility model discloses an integrated wool button, the beneficial effects of which are:

[0016] This utility model is small in size and highly reliable. By integrating the fixing cap and the button into a single structure, the number of contact surfaces is effectively reduced. This not only reduces the complexity of the signal transmission path and the signal propagation delay, but also improves the integrity of the signal. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a one-piece wool button;

[0018] Figure 2 An isometric drawing of a one-piece wool button;

[0019] Figure 3 A cross-sectional view of a one-piece wool button;

[0020] Among them: 1. Fixing cap; 11. Welding surface; 12. Groove; 13. Limiting boss; 14. Four corner crimped pleats; 2. Fur button. Detailed Implementation

[0021] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0022] refer to Figure 1 This embodiment provides an integrated wool button, including a fixing cap 1 and a wool button 2.

[0023] refer to Figure 2 The fixing cap 1 is a cylindrical structure with a connection hole at the top. The bottom surface of the fixing cap 1 is a welding surface 11 for soldering to the first circuit board. The outer wall of the fixing cap 1 is interference-fitted with the mounting hole on the base. The interference fit increases the interference between the button 2 and the base, preventing the button 2 from falling off the base. A limiting boss 13 is provided on the outer wall of the fixing cap 1, and a groove 12 is provided at the connection between the limiting boss 13 and the outer wall.

[0024] The welding surface 11 at the bottom of the fixing cap 1 makes more reliable contact with the first circuit board. Considering that molten solder has a certain fluidity during the welding process and can spread upwards along the wires or metal surfaces due to capillary action, resulting in solder creep, the groove 12 acts as a physical barrier, blocking the direct path of molten solder and preventing solder creep. The groove 12 also improves the welding strength and ensures the signal transmission effect.

[0025] The button 2 has one end fixed in the connection hole and the other end used to pass through the mounting hole and contact the second circuit board.

[0026] In this embodiment, the height of the button 2 is 1.5 to 2 times the height of the fixed cap 1. The button 2 is a cylindrical structure and is made of conductive metal wire or conductive fiber.

[0027] refer to Figures 1-3 As a specific method of fixing the cap 1 and the button 2, the cap 1 is pressed and fixed to the button 2 through the connecting hole. This pressing method makes the connection between the button 2 and the cap 1 more secure, avoiding the problem of incomplete soldering that may occur with traditional welding methods, thereby enhancing the reliability of the connection and ensuring good electrical contact performance.

[0028] As a further embodiment, a four-corner pressing pleat 14 is provided at the connection between the top of the outer wall of the fixing cap 1 and the button 2. Each of the four corner pressing pleats 14 has outwardly protruding pleats on all four sides. The maximum diagonal length of the four corner pressing pleats 14 is less than or equal to the outer diameter of the outer wall of the fixing cap.

[0029] The four-corner crimped pleats 14 are formed when the fixing cap 1 and the button 2 are crimped together. The four-corner crimped pleats 14 not only improve the mechanical connection strength between the button 2 and the fixing cap 1, but also increase the connection strength between the fixing cap 1 and the base mounting hole.

[0030] In summary, the beneficial effects of this solution are as follows:

[0031] This solution is small in size and highly reliable. By integrating the fixing cap 1 and the button 2 into a single structure and using the interference fit between the outer wall and the mounting hole of the base, the number of contact surfaces is effectively reduced. This not only reduces the complexity of the signal transmission path and the signal propagation delay, but also improves the integrity of the signal.

[0032] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A one-piece wool button, characterized in that, include: The fixing cap (1) is a cylindrical structure with a connection hole on the top. The bottom surface of the fixing cap (1) is a welding surface (11) for welding with the first circuit board. The outer wall of the fixing cap (1) is interference-fitted with the mounting hole on the base. A limiting boss (13) is provided on the outer wall of the fixing cap (1), and a groove (12) is provided at the connection between the limiting boss (13) and the outer wall. A bobby button (2), one end of which is fixed in the connecting hole, and the other end of which is used to pass through the mounting hole and contact the second circuit board.

2. The one-piece wool button according to claim 1, characterized in that, The fixing cap (1) is pressed and fixed to the button (2) through the connecting hole.

3. The one-piece wool button according to claim 2, characterized in that, The top of the outer wall of the fixed cap (1) is provided with four corner press-fit pleats (14) at the connection between it and the button (2). The four corner press-fit pleats (14) are provided with outward protruding pleats on all four sides.

4. The one-piece wool button according to claim 3, characterized in that, The maximum diagonal length of the four corner press-fit pleats (14) is less than or equal to the outer diameter of the outer wall of the fixing cap (1).

5. The one-piece wool button according to claim 2, characterized in that, The groove (12) is arranged in a ring on the outer wall of the fixing cap (1).

6. The one-piece wool button according to claim 1, characterized in that, The height of the wool button (2) is 1.5 to 2 times the height of the fixing cap (1).

7. The one-piece wool button according to claim 1, characterized in that, The material of the wool button (2) is conductive metal wire or conductive fiber.

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