Waterproof type microswitch

Abstract

The utility model discloses a waterproof type light touch switch, including base and the cover of clamping in the top of base, the base is opened with contact cavity, the contact cavity is located in the fixedly connected with waterproof baffle at the edge of the cavity mouth, the top of base is installed with button, the button includes sealing board, press block and convex bundle, the top fixedly connected with press block of sealing board, the fixedly connected with convex bundle of sealing board bottom middle part, sealing board bottom surface and the top surface of base contact, sealing board bottom surface is located waterproof groove in waterproof baffle relative position and set up, and waterproof groove inner wall and waterproof baffle outer wall contact. Combination above structure design, thereby effectively solved the problem of background art.

Description

Technical Field

[0001] This utility model relates to the field of tactile switch technology, specifically a waterproof tactile switch. Background Technology

[0002] Tactile switches are widely used in household appliances due to their small size and light weight, such as audio-visual products, digital products, remote controls, communication products, security products, toys, computer products, fitness equipment, medical equipment, counterfeit money detectors, laser pointer buttons, etc. However, tactile switches also have their shortcomings. Common tactile switches have complex structures, and noise is generated when the switch is pressed, which cannot meet the needs of modern people for tactile switches.

[0003] In current tactile switch technology, improved waterproofing is a core requirement, leading most manufacturers to add a waterproof membrane inside the switch. However, this design generally faces a critical problem: to accommodate the limited space inside the switch, the waterproof membrane is usually made quite thin. During repeated button presses, an excessively thin membrane is prone to permanent deformation and is difficult to return to its initial state. Over time, this deformation severely compromises its sealing performance, ultimately leading to a significant decrease or even failure of the switch's waterproofing effect. Summary of the Invention

[0004] The purpose of this invention is to provide a waterproof tactile switch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof tactile switch, comprising a base and a cover plate snapped onto the top of the base, wherein a contact cavity is formed inside the base, and a waterproof baffle is fixedly connected to the edge of the contact cavity opening, and a button is installed on the top of the base, the button comprising a sealing plate, a pressing block and a protrusion, the pressing block being fixedly connected to the top of the sealing plate, and the protrusion being fixedly connected to the middle of the bottom of the sealing plate, the bottom surface of the sealing plate contacting the top surface of the base, and a waterproof groove being formed on the bottom surface of the sealing plate at a position opposite to the waterproof baffle, and the inner wall of the waterproof groove contacting the outer wall of the waterproof baffle.

[0006] Preferably, the top surface of the base is fixedly connected to the left and right ends of the contact cavity with fasteners, and the surface of the cover plate is provided with a fixing hole at the opposite position of the fastener, and the fixing hole and the fastener are interlocked.

[0007] Preferably, the sealing plate has clearance openings at its left and right ends relative to the fixing member, and the inner wall of the clearance opening is in contact with the outer wall of the fixing member.

[0008] Preferably, a plurality of contact parts are fixedly connected to the bottom of the contact cavity, and a spring is provided above the contact parts in the contact cavity, with the middle part of the spring in movable contact with one of the contact parts, and the highest point of the top of the spring in contact with the convex bulge.

[0009] Preferably, the cover plate has a movable opening in the middle of its surface, and a pressing block moves within the movable opening.

[0010] Preferably, a mounting guide block is fixedly connected to the bottom surface of the base.

[0011] Preferably, the sealing plate, pressing block, and convex bulge are designed as an integral molding structure.

[0012] Beneficial effects

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model abandons the traditional tactile switch design that relies on a thin waterproof membrane for sealing. By setting a waterproof strip at the edge of the base contact cavity, and cooperating with the waterproof groove opened at the bottom of the button sealing plate, a physical sealing structure with concave and convex fits is formed. This rigid sealing contact method avoids the problem of permanent deformation of the thin waterproof membrane due to repeated pressing. The sealing surface always remains in a tight fit, structurally eliminating the hidden danger of the waterproof performance decreasing with the time of use. It significantly improves the durability and reliability of the switch's waterproof effect, and can adapt to complex usage environments such as humid and dusty environments for a long time.

[0015] 2. The switch of this utility model is composed of core components such as a base, a cover plate, and a button. These components are assembled using a snap-fit ​​method. The fixing piece on the top of the base directly engages with the fixing hole in the cover plate, and the clearance opening of the button sealing plate precisely matches the position of the fixing piece, eliminating the need for complex connectors or assembly processes. Compared to traditional switches with complex structures in the prior art, this design significantly simplifies the assembly process, reduces production and maintenance costs, and ensures high precision in the fit of each component, resulting in strong structural stability after assembly. This further enhances the feasibility of mass production and the durability of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0018] The correspondence between the labels and component names in the attached figures is as follows:

[0019] 1. Base; 2. Cover plate; 3. Button; 4. Fixture; 5. Spring; 11. Contact cavity; 12. Contact part;

[0020] 13. Waterproof baffle strip; 14. Installation guide block; 21. Movable opening; 22. Fixed opening; 31. Sealing plate;

[0021] 32. Pressing block; 33. Protrusion; 34. Waterproof groove; 35. Clearance opening. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "vertical," and "horizontal," 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 the invention and simplifying the description, and 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figure 1-2 This is a schematic diagram of a waterproof tactile switch according to a preferred embodiment of the present invention. In this embodiment, the waterproof tactile switch mainly includes a base 1, a cover plate 2, a button 3, a fixing member 4, and a spring 5. The base 1 is the supporting body of the switch, and a downwardly recessed contact cavity 11 is formed inside it. A plurality of contact parts 12 for electrical connection are fixedly connected to the bottom of the contact cavity 11.

[0025] In this embodiment, the contact portions 12 are preferably three in a triangular arrangement. A ring-shaped waterproof baffle 13 is fixedly connected to the edge of the cavity opening of the contact cavity 11, and the waterproof baffle 13 is slightly higher than the top surface of the base 1. A mounting guide block 14 is also fixedly connected to the bottom of the base 1 to facilitate the precise installation of the entire switch onto the circuit board.

[0026] The cover plate 2 is fixed to the top of the base 1 by snap-fit. The cover plate 2 has a movable opening 21 in the middle and fixing holes 22 at its left and right ends.

[0027] In this embodiment, button 3 is the user's operating component, manufactured by integral injection molding of sealing plate 31, pressing block 32, and protrusion 33, ensuring the integrity of the structure and the reliability of the seal. Sealing plate 31 is a flat plate structure, with its bottom surface in direct contact with the top surface of base 1. A cylindrical pressing block 32 is fixedly connected to the top center of sealing plate 31, extending upwards through the movable opening 21 of cover plate 2, allowing the user to operate the device by pressing this opening. A downwardly protruding protrusion 33 is fixedly connected to the bottom center of sealing plate 31.

[0028] To achieve the core waterproof function, a ring-shaped waterproof groove 34 is formed on the bottom surface of the sealing plate 31, directly opposite the waterproof baffle 13 on the base 1. After assembly, the waterproof baffle 13 on the base 1 is precisely embedded in the waterproof groove 34 of the button 3, and the two walls are in close contact, forming a mechanical seal barrier, which can effectively prevent external liquids from seeping into the contact cavity 11 from the joint between the button 3 and the base 1.

[0029] Furthermore, columnar fasteners 4 are fixedly connected to the top surface of the base 1 at both ends of the contact cavity 11. Correspondingly, clearance openings 35 corresponding to the positions of the fasteners 4 are also provided at both ends of the sealing plate 31 surface of the button 3. During assembly, the fasteners 4 pass through the clearance openings 35 and engage with the fixing holes 22 on the cover plate 2, thereby firmly assembling the base 1, button 3, and cover plate 2 together. The inner wall of the clearance opening 35 contacts the outer wall of the fastener 4, serving a positioning function, and the contact between the inner wall of the clearance opening 35 and the outer wall of the fastener 4 also provides an auxiliary sealing effect.

[0030] In this embodiment, a flexible metal spring 5 is provided inside the contact cavity 11. The middle part of the spring 5 maintains active contact with one of the contact parts 12, and its highest point contacts the protrusion 33 at the bottom of the button 3.

[0031] Working principle

[0032] When the user applies downward pressure to the pressing block 32, the force is transmitted to the convex 33 through the button 3. The convex 33 presses down on the spring 5, causing it to undergo elastic deformation, thereby connecting the middle part of the spring 5 with another contact part 12, and the circuit is turned on.

[0033] After the pressing block 32 is released, the spring 5 returns to its original shape due to its own elasticity, pushing the button 3 as a whole to realize the circuit closing and opening of the tactile switch.

[0034] Throughout the pressing and resetting process, the waterproof groove 34 at the bottom of the sealing plate 31 and the waterproof baffle 13 on the base 1 always maintain a tight convex-concave fit. Even if liquid splashes onto the switch surface, it will be blocked by this mechanical seal structure and will not be able to enter the internal contact cavity 11, thus ensuring the switch's waterproof performance and long-term reliability.

[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A waterproof tactile switch, comprising a base (1) and a cover plate (2) snapped onto the top of the base (1), characterized in that: The base (1) has a contact cavity (11) inside. A waterproof baffle (13) is fixedly connected to the edge of the cavity opening inside the contact cavity (11). A button (3) is installed on the top of the base (1). The button (3) includes a sealing plate (31), a pressing block (32), and a protrusion (33). The pressing block (32) is fixedly connected to the top of the sealing plate (31). The protrusion (33) is fixedly connected to the middle of the bottom of the sealing plate (31). The bottom surface of the sealing plate (31) is in contact with the top surface of the base (1). A waterproof groove (34) is opened on the bottom surface of the sealing plate (31) at the position opposite to the waterproof baffle (13). The inner wall of the waterproof groove (34) is in contact with the outer wall of the waterproof baffle (13).

2. The waterproof tactile switch according to claim 1, characterized in that: The top surface of the base (1) is fixedly connected to the left and right ends of the contact cavity (11) with fasteners (4). The surface of the cover plate (2) is provided with a fixing hole (22) at the opposite position of the fastener (4), and the fixing hole (22) and the fastener (4) are interlocked.

3. The waterproof tactile switch according to claim 1, characterized in that: The sealing plate (31) has clearance openings (35) at its left and right ends on the surface, which are located opposite to the fixing member (4), and the inner wall of the clearance opening (35) is in contact with the outer wall of the fixing member (4).

4. The waterproof tactile switch according to claim 1, characterized in that: Multiple contact parts (12) are fixedly connected to the bottom of the contact cavity (11). A spring (5) is provided above the contact part (12) in the contact cavity (11). The middle part of the spring (5) is in contact with one of the contact parts (12). The highest point of the top of the spring (5) is in contact with the convex bulge (33).

5. A waterproof tactile switch according to claim 2, characterized in that: The cover plate (2) has a movable opening (21) in the middle of its surface, and a pressing block (32) moves within the movable opening (21).

6. A waterproof tactile switch according to claim 2, characterized in that: The base (1) has a mounting guide block (14) fixedly connected to its bottom surface.

7. A waterproof tactile switch according to claim 1, characterized in that: The sealing plate (31), pressing block (32) and convex bulge (33) adopt an integrated molding structure design.

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