Double-layer waterproof and anti-glue-pouring switch

Abstract

The utility model provides a double-layer waterproof glue-pouring-prevention switch, which belongs to the technical field of switches and comprises a base, a cover plate and a button, a first cavity is arranged on the base, an elastic sheet is arranged in the first cavity, a second cavity is arranged on the cover plate, the button is arranged in the second cavity, and the elastic sheet is arranged in the second cavity. A first membrane and a second membrane are arranged between the base and the cover plate in an abutting mode, the first membrane seals the upper end of the first cavity, and the second membrane seals the lower end of the second cavity; the waterproof performance of the switch is greatly improved through the double-sealing design of the first diaphragm and the second diaphragm, the second diaphragm can prevent hot melt adhesive from entering the first cavity and the second cavity during adhesive pouring, the normal function of the switch is ensured, and the first diaphragm can effectively prevent moisture from entering the first cavity, so that an internal circuit is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a double-layer waterproof and glue-proof switch. Background Art

[0002] With the widespread application of electronic products, micro switches are widely used in various devices such as home appliances, industrial control, automotive electronics and consumer electronics due to their excellent performance and high sensitivity. However, traditional micro switches often face challenges in humid environments after being soldered to circuit boards. In order to solve the impact of moisture on circuits and switches, manufacturers usually adopt the method of glue filling to enhance the waterproof performance to ensure the stability and reliability of the equipment in harsh environments. In the prior art, hot melt adhesive is a commonly used material in the glue filling process. Because of its good bonding strength and water resistance, it is widely used in the protection of electrical components.

[0003] At present, hot melt adhesive is usually melted at high temperature and applied to the circuit board, and solidifies to form an adhesive layer when it cools down. If the hot melt adhesive accidentally enters the micro switch during the curing process, it will cause the mechanical structure of the switch to be damaged, the button will be stuck or frozen, and it will not operate normally. Utility Model Content

[0004] The utility model aims to overcome the shortcomings and deficiencies of the prior art and to provide a double-layer waterproof and glue-proof switch.

[0005] The technical solution adopted by the utility model is as follows: The application provides a double-layer waterproof and anti-glue switch, including a base, a cover plate and a button, the base is provided with a first cavity, the first cavity is provided with a spring, the cover plate is provided with a second cavity, the button is provided in the second cavity, a first diaphragm and a second diaphragm are abutted between the base and the cover plate, the first diaphragm seals the upper end of the first cavity, and the second diaphragm seals the lower end of the second cavity.

[0006] In some embodiments, a groove portion is disposed on the upper end surface of the base, the groove portion is in a cross shape, and the first diaphragm and the second diaphragm are in a cross shape and are disposed in the groove portion.

[0007] In some embodiments, positioning columns are disposed at four corners of the upper end surface of the base, through holes for the positioning columns to pass through are disposed at four corners of the cover plate, and the through holes protruding from the upper ends of the positioning columns are used for riveting.

[0008] In some embodiments, the four corners of the cover plate are provided with sinking grooves corresponding to the through holes, and the side wall of the sinking groove close to the center of the cover plate is provided as an arc surface.

[0009] In some embodiments, it also includes a first contact sheet, a second contact sheet and a third contact sheet, and the first contact sheet, the second contact sheet and the third contact sheet are all integrally injection molded with the base.

[0010] In some embodiments, the first contact piece is arranged in the middle of the first cavity, the second contact piece and the third contact piece are located on both sides of the first contact piece, the first contact piece, the second contact piece and the third contact piece are respectively provided with a first contact point, a second contact point and a third contact point, the outer edge of the spring piece abuts against the second contact point and the third contact point, and a gap is arranged between the middle part and the first contact point, and the second contact piece and the third contact piece are both provided with pins extending outside the base.

[0011] In some embodiments, the button includes a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion which are arranged in sequence, the diameter of the second cylindrical portion is larger than the diameter of the first cylindrical portion, the diameter of the first cylindrical portion is larger than the diameter of the third cylindrical portion, the second cavity includes a first channel portion which is adapted to the second cylindrical portion and allows it to slide up and down, and a second channel portion for the first cylindrical portion to pass through, the outer edge of the lower end face of the third cylindrical portion is rounded, and the lower end face of the third cylindrical portion abuts against the second diaphragm.

[0012] In some embodiments, the second diaphragm is made of a flexible material, a positioning ring portion is coaxially arranged on the upper end of the second diaphragm and the third column portion, a fixing ring portion is sleeved on the outer periphery of the positioning ring portion, the fixing ring portion is made of a rigid material, and an annular groove portion is arranged on the outer ring of the third column portion on the second column portion for the fixing ring portion to extend into.

[0013] In some embodiments, the cover plate is provided with a sealing protrusion facing the second diaphragm, and the sealing protrusion presses against the second diaphragm.

[0014] In some embodiments, the thickness of the second diaphragm is not greater than 0.5 mm, and the thickness of the first diaphragm is not greater than 0.1 mm.

[0015] The beneficial effects of the present invention are as follows: in the present invention, the double sealing design of the first diaphragm and the second diaphragm greatly improves the waterproof performance of the switch. The second diaphragm can prevent hot melt adhesive from entering the first cavity and the second cavity during glue filling, thereby ensuring the normal function of the switch. The first diaphragm can effectively block moisture from entering the first cavity, thereby protecting the internal circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 The utility model is a double-layer waterproof and anti-glue switch explosion Figure 1 ;

[0018] Figure 2 This is a cross-sectional view of the double-layer waterproof and anti-glue switch in the utility model Figure 1 ;

[0019] Figure 3 It is a schematic diagram of the base in the utility model;

[0020] Figure 4 It is a schematic diagram of a double-layer waterproof and anti-glue switch in the utility model;

[0021] Figure 5 The utility model is a double-layer waterproof and anti-glue switch explosion Figure 2 ;

[0022] Figure 6 This is a cross-sectional view of the double-layer waterproof and anti-glue switch in the utility model Figure 2 . DETAILED DESCRIPTION

[0023] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0024] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0026] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0027] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0029] In a humid environment, traditional micro switches are often filled with hot melt adhesive to enhance waterproof performance after being soldered to the circuit board. The hot melt adhesive melts at high temperature and is applied to the circuit board. After cooling, it solidifies to form an adhesive layer. If the hot melt adhesive accidentally penetrates into the micro switch during the curing process, it will damage the mechanical structure of the switch, causing the button to stick or get stuck, which will affect the normal operation of the switch.

[0030] Based on the above problems, Figures 1 to 6 As shown, a double-layer waterproof and glue-proof switch is provided in the present specification, including a base 1, a cover plate 2 and a button 3. A first cavity 4 is provided on the base 1, and a spring 5 is provided in the first cavity 4. A second cavity 6 is provided on the cover plate 2, and the button 3 is provided in the second cavity 6. A first diaphragm 7 and a second diaphragm 8 are abutted between the base 1 and the cover plate 2. The first diaphragm 7 seals the upper end of the first cavity 4, and the second diaphragm 8 seals the lower end of the second cavity 6. In this way, the waterproof performance is greatly improved through the double sealing design of the first diaphragm 7 and the second diaphragm 8. The second diaphragm 8 can prevent hot melt adhesive from entering the first cavity 4 and the second cavity 6 during glue injection, thereby ensuring the normal function of the switch. The first diaphragm 7 can effectively block moisture from entering the first cavity 4, thereby protecting the internal circuit.

[0031] Therefore, through effective waterproof and anti-glue design, the stability of the entire switch can be significantly improved, and it can adapt to a variety of humid, dusty or high-concentration chemical working environments. It is widely used in home appliances, automotive electronics, industrial control and other fields to meet the needs of various industries.

[0032] Optionally, the material of the first diaphragm 7 is polyester film PET, polyurethane PU or polytetrafluoroethylene PTFE, which has good waterproof performance and can withstand mechanical pressure to a certain extent. Secondly, the thickness of the first diaphragm 7 is not more than 0.1mm, which is conducive to the miniaturization of the switch.

[0033] Optionally, the material of the second diaphragm 8 is selected from silicone rubber or fluororubber, which has good performance in anti-glue, is not easily penetrated by hot melt adhesive, and has a certain elasticity, and can be squeezed to enhance the seal. Secondly, the thickness of the second diaphragm 8 is not greater than 0.5mm. Since its main function is to prevent the invasion of hot melt adhesive, it can be appropriately thicker to enhance its ability to resist glue penetration.

[0034] In addition, the thickness of the diaphragm should not be too thick so as not to affect the effective triggering of the switch.

[0035] In some embodiments, a groove portion 9 is provided on the upper end surface of the base 1, and the groove portion 9 is cross-shaped. The first diaphragm 7 and the second diaphragm 8 are cross-shaped and are arranged in the groove portion 9, which can better accommodate the first diaphragm 7 and the second diaphragm 8, enhance the contact area between the diaphragm and the base, and provide a tighter sealing effect. Secondly, the cross-shaped groove portion 9 can accurately position the diaphragm to avoid dislocation or movement of the diaphragm during the assembly process, thereby ensuring the normal operation and protection performance of the switch.

[0036] In some embodiments, positioning posts 10 are provided at the four corners of the upper end surface of the base 1, and through holes 11 for the positioning posts 10 to pass through are provided at the four corners of the cover plate 2, thereby ensuring precise alignment between the cover plate 2 and the base 1. The overall structure of the switch can maintain consistency during assembly, thereby reducing functional problems caused by assembly errors.

[0037] Secondly, the protruding through hole 11 at the upper end of the positioning column 10 is used for riveting to form a firm mechanical connection, which is more reliable than traditional screws or bonding. The riveted connection can effectively resist vibration and impact, improve the durability and reliability of the switch, and simplify the production process, reduce the number of components required, and facilitate automated assembly.

[0038] In some embodiments, the four corners of the cover plate 2 are provided with sinking grooves 12 corresponding to the through holes 11, and the side walls of the sinking grooves 12 close to the center of the cover plate 2 are provided with arc-shaped surfaces 13. The design of the sinking grooves 12 is easier to position during riveting, which is conducive to automation and can effectively disperse the stress generated during the riveting process. The setting of the arc-shaped surface 13 can avoid interference with the riveting equipment, which is conducive to improving the riveting efficiency.

[0039] In some embodiments, the switch further includes a first contact piece 14, a second contact piece 15 and a third contact piece 16. The first contact piece 14, the second contact piece 15 and the third contact piece 16 are all integrally injection molded with the base 1. Since the contact piece and the base are integrally molded, the connection gap is reduced and the waterproof and dustproof performance of the switch is improved.

[0040] In some embodiments, the first contact piece 14 is arranged in the middle of the first cavity 4, the second contact piece 15 and the third contact piece 16 are located on both sides of the first contact piece 14, and the first contact point 17, the second contact point 18 and the third contact point 19 are respectively arranged on the first contact piece 14, the second contact piece 15 and the third contact piece 16, thereby ensuring good electrical contact performance. The outer edge of the spring piece 5 abuts against the second contact point 18 and the third contact point 19, and a spacing 20 is arranged between the middle part and the first contact point 17, thereby ensuring smooth flow of current between the contacts and improving the electrical performance of the switch. The second contact piece 15 and the third contact piece 16 are both provided with pins 21 extending outside the base 1, thereby conveniently connecting the switch to an external circuit.

[0041] In some embodiments, the button 3 includes a first cylindrical portion 22, a second cylindrical portion 23 and a third cylindrical portion 24 which are arranged in sequence, the diameter of the second cylindrical portion 23 is larger than the diameter of the first cylindrical portion 22, the diameter of the first cylindrical portion 22 is larger than the diameter of the third cylindrical portion 24, and the second cavity 6 includes a first channel portion 25 which is adapted to the second cylindrical portion 23 and allows it to slide up and down, and a second channel portion 26 for the first cylindrical portion 22 to pass through. Such an arrangement can effectively control the operating stroke and feedback of the button, thereby improving the flexibility and operability of use.

[0042] The outer edge of the lower end surface of the third column portion 24 is chamfered 27, and the lower end surface of the third column portion 24 abuts against the second diaphragm 8, so that the lower end surface of the third column portion 24 can better maintain contact with the second diaphragm 8, reducing damage to the second diaphragm 8 during long-term use.

[0043] In some embodiments, Figure 6 As shown, the second diaphragm 8 is made of a flexible material, such as silicone rubber and fluororubber, so that it can play a better sealing role. The upper end of the second diaphragm 8 is coaxially provided with a positioning ring portion 80 with the third column portion 24. It can be understood that the positioning ring portion 80 and the second diaphragm 8 are integrally formed to facilitate the positioning of the button 3, and at the same time enable the button 3 to apply force to the spring sheet 5 along its axial direction, thereby ensuring that the spring sheet 5 and the first contact sheet 14 are not misaligned when they are in conductive contact.

[0044] Secondly, a fixing ring portion 81 is sleeved on the outer periphery of the positioning ring portion 80 , and the fixing ring portion 81 is made of a rigid material, such as a metal ring and a plastic ring, so as to ensure that the flexible positioning ring portion 80 plays a stable positioning role.

[0045] The outer ring of the third column portion 24 on the second column portion 23 is provided with a first groove portion 230 into which the fixing ring portion 81 can extend, so as not to affect the travel of the button 3 .

[0046] In some embodiments, a protrusion 82 is provided on the second diaphragm 8 toward the cover plate 2, the outer peripheral wall of the protrusion 82 is provided as a slope 83, and a second groove portion matched with the protrusion 82 is provided on the cover plate 2, thereby enhancing the sealing performance here.

[0047] In some embodiments, the cover plate 2 is provided with a sealing protrusion toward the second diaphragm 8 , and the sealing protrusion is pressed against the second diaphragm 8 . The shape of the sealing protrusion matches the shape of the second diaphragm 8 , so that the second diaphragm 8 can be better pressed between the base 1 and the cover plate 2 .

[0048] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0049] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0050] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A double-layer waterproof and anti-glue switch, comprising a base (1), a cover (2) and a button (3), characterized in that: The base (1) is provided with a first cavity (4), a spring sheet (5) is provided in the first cavity (4), the cover plate (2) is provided with a second cavity (6), the button (3) is provided in the second cavity (6), a first diaphragm (7) and a second diaphragm (8) are provided in contact with each other between the base (1) and the cover plate (2), the first diaphragm (7) seals the upper end of the first cavity (4), and the second diaphragm (8) seals the lower end of the second cavity (6).

2. The double-layer waterproof and anti-glue switch according to claim 1, characterized in that: The upper end surface of the base (1) is provided with a groove portion (9), the groove portion (9) is in a cross shape, and the first diaphragm (7) and the second diaphragm (8) are in a cross shape and are arranged in the groove portion (9).

3. The double-layer waterproof and anti-glue switch according to claim 1, characterized in that: Positioning columns (10) are arranged at four corners of the upper end surface of the base (1), through holes (11) for the positioning columns (10) to pass through are arranged at four corners of the cover plate (2), and the upper ends of the positioning columns (10) protrude through the through holes (11) for riveting.

4. The double-layer waterproof and anti-glue switch according to claim 3, characterized in that: The four corners of the cover plate (2) are provided with sinking grooves (12) corresponding to the through holes (11), and the side wall of the sinking groove (12) close to the center of the cover plate (2) is provided as an arc-shaped surface (13).

5. The double-layer waterproof and anti-glue switch according to claim 1, characterized in that: It also comprises a first contact sheet (14), a second contact sheet (15) and a third contact sheet (16), wherein the first contact sheet (14), the second contact sheet (15) and the third contact sheet (16) are all integrally injection-molded with the base (1).

6. The double-layer waterproof and anti-glue switch according to claim 5, characterized in that: The first contact sheet (14) is arranged in the middle of the first cavity (4), the second contact sheet (15) and the third contact sheet (16) are located on both sides of the first contact sheet (14), the first contact sheet (14), the second contact sheet (15) and the third contact sheet (16) are respectively provided with a first contact point (17), a second contact point (18) and a third contact point (19), the outer edge of the spring sheet (5) abuts against the second contact point (18) and the third contact point (19), a spacing (20) is provided between the middle part and the first contact point (17), and the second contact sheet (15) and the third contact sheet (16) are both provided with pins (21) extending outside the base (1).

7. The double-layer waterproof and anti-glue switch according to claim 1, characterized in that: The button (3) comprises a first column portion (22), a second column portion (23) and a third column portion (24) which are arranged in sequence, the diameter of the second column portion (23) being greater than the diameter of the first column portion (22), the diameter of the first column portion (22) being greater than the diameter of the third column portion (24), the second cavity (6) comprising a first channel portion (25) adapted to the second column portion (23) and allowing the second column portion (23) to slide up and down, and a second channel portion (26) for the first column portion (22) to pass through, the outer edge of the lower end surface of the third column portion (24) being chamfered (27), and the lower end surface of the third column portion (24) being in contact with the second diaphragm (8).

8. The double-layer waterproof and anti-glue switch according to claim 7, characterized in that: The second diaphragm (8) is made of a flexible material. A positioning ring portion (80) is coaxially arranged at the upper end of the second diaphragm (8) and the third column portion (24). A fixing ring portion (81) is sleeved on the outer periphery of the positioning ring portion (80). The fixing ring portion (81) is made of a rigid material. An annular groove is arranged on the outer ring of the second column portion (23) located on the outer ring of the third column portion (24) into which the fixing ring portion (81) can extend.

9. The double-layer waterproof and anti-glue switch according to claim 1, characterized in that: The cover plate (2) is provided with a sealing protrusion facing the second diaphragm (8), and the sealing protrusion is pressed against the second diaphragm (8).

10. The double-layer waterproof and anti-glue switch according to claim 1, characterized in that: The thickness of the second diaphragm (8) is not greater than 0.5 mm, and the thickness of the first diaphragm (7) is not greater than 0.1 mm.

Images