A touch spring structure capable of realizing a patch

Abstract

This utility model relates to the field of electronic touch switch technology, and in particular to a touch spring structure capable of surface mount application, comprising a metal base and a spring body; the metal base includes a base plate, a limiting part, several connecting parts, and several pressing parts, wherein the connecting parts and the pressing parts are alternately arranged and interconnected, and the connecting parts and the pressing parts together form a continuous annular structure, the annular structure being connected to the upper edge of the limiting part, the lower edge of the limiting part being connected to the edge of the base plate, the base plate and the pressing parts being respectively attached to the bottom and top surfaces of the pressing end, the inner wall of the limiting part contacting the outer spring ring of the pressing end, and the pressing part being pressed by a mold to form an integral structure with the base plate, the limiting part, and the connecting parts, thereby solving the problem that the spring body of the current surface mount touch spring structure is prone to loosening, which easily causes poor contact and affects the use.

Description

Technical Field

[0001] This utility model relates to the field of electronic touch switch technology, and in particular to a touch spring structure that can realize patch mounting. Background Technology

[0002] Touch springs are mainly used in capacitive and microcontroller-based touch screen appliances. As an alternative to capacitive sensing, they offer robust performance and excellent touch sensitivity. They can enable touch button control products without changing the casing mold. They are suitable for various household appliances such as induction cookers, microwave ovens, electric ovens, electronic wine cabinets, disinfection cabinets, range hoods, heaters, and water heaters. They can also be used in vehicle electronic equipment, such as radios, TV tuners, control panels, and occupant detection systems on seats.

[0003] However, most touch springs on the market are plug-in springs. The manufacturing process of plug-in springs is complex, and the installation of springs requires manual plug-in welding. Therefore, using springs that can be patched is more in line with the requirements of simplicity and cost reduction. However, the existing patching springs generally use protruding structures to rivet the spring for fixation. However, it is difficult to ensure the consistency of each protruding structure riveting in this way. Uneven force affects the stability of the connection and cannot effectively ensure that the patch and the spring are concentric. This weakens the mechanical strength of the connection, makes it easy to loosen, and may cause poor contact, affecting the use. Utility Model Content

[0004] To address the aforementioned shortcomings, the purpose of this invention is to propose a touch spring structure that enables patch application, thereby solving the problem that the spring body of current touch spring structures used for patch application is prone to loosening, leading to poor contact and affecting usability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A touch spring structure capable of patch mounting includes a metal base and a spring body;

[0007] The spring body includes an elastic part, and one end of the elastic part is formed by a spring coil wound outward in the same plane to form a press-fit end.

[0008] The metal base includes a base plate, a limiting part, several connecting parts, and several pressing parts. The connecting parts and the pressing parts are arranged alternately and connected to each other, forming a continuous annular structure. The annular structure is connected to the upper edge of the limiting part, and the lower edge of the limiting part is connected to the edge of the base plate. The pressing parts, the limiting part, and the base plate together form a receiving area for accommodating the pressing end. The base plate and the pressing parts are respectively attached to the bottom and top surfaces of the pressing end. The inner wall of the limiting part contacts the outer spring ring of the pressing end. The pressing part is pressed by a mold to form an integral structure with the base plate, the limiting part, and the connecting parts.

[0009] Preferably, the wire diameter of the spring coil at the crimping end is d, and the depth D of the crimping portion is 2-3 times d.

[0010] Preferably, the number of pressing parts is at least three, and the number of connecting parts is equal to the number of pressing parts.

[0011] Preferably, the thickness h of the metal base is 0.15-0.3 mm.

[0012] Preferably, the gap distance w of the spring coil at the crimping end is not greater than the wire diameter width d of the spring coil at the crimping end.

[0013] Preferably, the end spring coils of the elastic portion are wound at least two turns outward in the same plane.

[0014] Preferably, the metal base is made of stainless steel.

[0015] Preferably, the side of the base plate that is not facing the crimping end is a plane.

[0016] The technical solution provided by this utility model can include the following beneficial effects:

[0017] Using a metal base, including a pressing part, a limiting part, and a base plate, the pressing end of the spring body is fitted and clamped into the receiving area. The mold presses to form the pressing part. The uniform distribution of the pressing part ensures that the pressing end is subjected to uniform force, ensuring that the connection between the spring body and the metal base is tight and reliable, and there will be no loosening. The limiting part ensures that the metal base and the spring body are concentric, ensuring good subsequent use and not affecting signal transmission. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a metal base according to an embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional view of one embodiment of the present invention.

[0021] Figure 4 This is a top view of a metal base according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the spring body according to one embodiment of the present invention.

[0023] The components include: metal base 1, base plate 11, limiting part 12, connecting part 13, pressing part 14, receiving area 15, elastic part 21, and pressing end 22. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The following is in conjunction with the appendix Figures 1 to 5 The technical solution of an embodiment of the present invention, which can realize a patch touch spring structure, will be further illustrated through specific implementation methods.

[0028] A touch spring structure capable of patch mounting includes a metal base 1 and a spring body;

[0029] The spring body includes an elastic part 21, and a spring coil is wound outward in the same plane to form a press-fit end 22 at one end of the elastic part 21.

[0030] The metal base 1 includes a base plate 11, a limiting part 12, a plurality of connecting parts 13, and a plurality of pressing parts 14. The connecting parts 13 and the pressing parts 14 are arranged alternately and connected to each other. The connecting parts 13 and the pressing parts 14 together form a continuous annular structure. The annular structure is connected to the upper edge of the limiting part 12, and the lower edge of the limiting part 12 is connected to the edge of the base plate 11. The pressing parts 14, the limiting part 12, and the base plate 11 together form a receiving area 15. The receiving area 15 is used to receive the pressing end 22. The base plate 11 and the pressing part 14 are respectively attached to the bottom surface and the top surface of the pressing end 22. The inner wall of the limiting part 12 is in contact with the outer spring ring of the pressing end 22. The pressing part 14 is pressed by a mold to form an integral structure with the base plate 11, the limiting part 12, and the connecting parts 13.

[0031] like Figures 1-5As shown, this utility model proposes a touch spring structure that enables patch mounting. The pressing part 14 is pressed together with the base plate 11, the limiting part 12 and the connecting part 13 by a mold to form an integral structure. The side of the base plate 11 that is not facing the pressing end 22 is flat. The integral structure formed by mold pressing can better maintain the flatness of the base plate 11, which is convenient for the patch machine to pick up and realize automated assembly. In addition, the flatness of the metal base 11 and the metal material make it easy to solder to the circuit board. In existing technologies, the spring is fixed by riveting the extended portion of the crimping plate, which makes it difficult to ensure concentricity between the crimping plate and the spring body after installation, and the consistency of the riveting of the extended portion is poor, making it prone to loosening; or the spring body needs to be rotated to engage the spring end with the crimping structure, which is inconvenient for installation. To solve the above problems, the touch spring structure proposed in this utility model uses the metal base 1 instead of the crimping plate. The crimping part 14, the limiting part 12, and the base plate 11 together form the receiving area 15. The base plate 11 and the crimping part 14 are respectively attached to the bottom surface and top surface of the crimping end 22. The inner wall of the limiting part 12 contacts the outer spring coil of the crimping end 22, through... The pressing force of the mold can effectively control the force applied by the pressing part 14 to the pressing end 22, so that the pressing end 22 is subjected to uniform force, and the pressing end 22 is locked in the receiving area 15, ensuring that the connection between the spring body and the metal seat 1 is tight and reliable, and there will be no loosening. In addition, the connecting part 13 and the pressing part 14 are alternately arranged and connected to each other. The connecting part 13 can effectively ensure the mechanical strength of the pressing part 14, making the pressing part 14 less prone to deformation, ensuring that the metal seat 1 and the spring body are firmly connected, and solving the problem that the spring body of the current touch spring structure used for patch is prone to loosening and causing poor contact. Meanwhile, the limiting part 12 restricts the crimping end 22, and the inner wall of the limiting part 12 contacts the outer spring ring of the crimping end 22, ensuring that the metal seat 1 and the spring body are concentric. Moreover, the metal seat 1 is formed in one step by pressing with a mold, and the shape and size of the metal seat 1 are well consistent, ensuring stable signal transmission when using this touch spring structure. This solves the problem that the current patch touch spring structure is not concentric and affects its use. The limiting part 12 can also facilitate the installation and positioning of the spring body on the metal seat 1.

[0032] Preferably, the specific installation process is as follows: a metal cylindrical barrel is used, the bottom of which is the base plate 11. The spring body is placed in the cylindrical barrel, and the pressing end 22 directly adheres to the base plate 11, with the periphery of the pressing end 22 adhering to the inner wall of the cylindrical barrel. The barrel is then pressed together in one step using a mold, squeezing the cylindrical barrel wall inward to obtain the pressing part 14. This pressing part 14 presses against the pressing end 22. The other areas of the cylindrical barrel wall are the connecting part 13 and the limiting part 12, thereby pressing the spring body tightly into the metal seat 1. Specifically, the mold used for pressing is adapted to the shape of the metal seat 1 and can be designed as needed.

[0033] Preferably, the wire diameter of the spring coil of the crimping end 22 is d, and the depth D of the crimping part 14 is 2-3 times d.

[0034] Specifically, such as Figure 4 and Figure 5 As shown, the depth D of the pressing part 14 is 2-3 times the wire diameter d of the spring coil of the pressing end 22, ensuring that the plane formed by the pressing end 22 fits against the base plate 11, increasing the contact area between the pressing part 14 and the pressing end 22, and reducing the risk of the spring body falling off the metal seat 1.

[0035] Preferably, the number of pressing parts 14 is at least three, and the number of connecting parts 13 is equal to the number of pressing parts 14.

[0036] Specifically, there are at least three pressing parts 14, and the connecting parts 13 are arranged alternately with the pressing parts 14 and connected to each other, that is, the pressing parts 14 are evenly distributed, which further ensures that the pressing end 22 is subjected to uniform force and improves the firmness of the spring body installed on the metal seat 1.

[0037] Preferably, the thickness h of the metal base 1 is 0.15-0.3 mm.

[0038] Currently, the wire diameter (d) of the spring coil in commercially available spring bodies is generally 0.5-1mm, to be compatible with circuit boards, such as... Figure 3 and Figure 4 As shown, the thickness h of the metal seat 1 is 0.15-0.3mm. The metal seat 1 is not easily deformed, ensuring that the metal seat 1 has sufficient thickness to press the spring body after being pressed by the mold. At the same time, it reduces the energy consumption of the mold pressing and reduces the increased cost caused by the excessive thickness of the metal seat 1.

[0039] It is worth noting that the thickness of the metal base 1 is the overall thickness, including the thickness of the base plate 11, the limiting part 12, the connecting part 13 and the pressing part 14.

[0040] Preferably, the gap distance w of the spring coil at the crimping end 22 is not greater than the wire diameter width d of the spring coil at the crimping end 22.

[0041] Specifically, such as Figure 5 As shown, the gap w between the two spring coils of the crimping end 22 does not exceed the width d of the wire diameter of one spring coil, so as to avoid the problem of weak connection caused by the crimping end 22 being too sparse and easily deformed, and reduce the difficulty of assembling and pressing the metal seat 1 and the spring body.

[0042] Preferably, the end spring coil of the elastic part 21 is wound at least two turns outward in the same plane.

[0043] Specifically, the end spring coil of the elastic part 21 is wound outward at least two turns in the same plane, that is, the crimping end 22 includes at least two turns of spring coil, which effectively increases the contact area between the crimping end 22 and the base plate 11, ensuring good contact and stable signal transmission during subsequent use.

[0044] Preferably, the metal base 1 is made of stainless steel.

[0045] Specifically, the metal base 1 can be made of copper, aluminum, zinc-plated or nickel-plated iron. When the requirements for salt spray are not high, the metal base 1 can be made of copper, aluminum, zinc-plated or nickel-plated iron.

[0046] For environments with high salt spray requirements and high humidity, such as the seaside, stainless steel can be used to ensure service life and strong connections.

[0047] Preferably, the metal base 1 is made of stainless steel SUS304.

[0048] Preferably, the side of the base plate 11 that is not facing the crimping end 22 is a plane.

[0049] Specifically, the touch spring structure is placed on the circuit board pads with solder paste using a pick-and-place machine for soldering. The flatness of the base plate 11 ensures that the touch spring structure can stand upright in the required position without bending or falling over. Moreover, compared to the spring body, there are gaps between its own spring coils, and the flatness of the base plate 11 allows for better solder adhesion and soldering.

[0050] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A touch spring structure capable of implementing a patch, characterized by: Includes a metal base and a spring body; The spring body includes an elastic part, and one end of the elastic part is formed by a spring coil wound outward in the same plane to form a press-fit end. The metal base includes a base plate, a limiting part, several connecting parts, and several pressing parts. The connecting parts and the pressing parts are arranged alternately and connected to each other, forming a continuous annular structure. The annular structure is connected to the upper edge of the limiting part, and the lower edge of the limiting part is connected to the edge of the base plate. The pressing parts, the limiting part, and the base plate together form a receiving area for accommodating the pressing end. The base plate and the pressing parts are respectively attached to the bottom and top surfaces of the pressing end. The inner wall of the limiting part contacts the outer spring ring of the pressing end. The pressing part is pressed by a mold to form an integral structure with the base plate, the limiting part, and the connecting parts.

2. The touch spring structure capable of implementing a patch according to claim 1, wherein: The wire diameter of the spring coil at the crimping end is d, and the depth D of the crimped part is 2-3 times d.

3. The touch spring structure capable of implementing a patch according to claim 1, wherein: The number of the pressing parts is at least three, and the number of the connecting parts is equal to the number of the pressing parts.

4. The touch spring structure capable of implementing a patch according to claim 1, wherein: The thickness h of the metal base is 0.15-0.3 mm.

5. The touch spring structure capable of implementing a patch according to claim 2, wherein: The gap distance w of the spring coil at the crimping end is not greater than the wire diameter width d of the spring coil at the crimping end.

6. The touch spring structure capable of implementing a patch according to claim 1, wherein: The end spring coils of the elastic part are wound at least two turns outward in the same plane.

7. The touch spring structure capable of implementing a patch according to claim 1, wherein: The metal base is made of stainless steel.

8. The touch spring structure capable of implementing a patch according to claim 1, wherein: The side of the base plate that is not facing the crimping end is a flat surface.

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