A long-life microswitch

Abstract

The utility model discloses a long service life's microswitch, including base, button of sliding installation on base and install the apron on the top of base, and the inside of base is equipped with first terminal and second terminal respectively, and the top of first terminal is installed with the sheet of metal, and the bottom of button is equipped with the support board, and the bottom of support board is equipped with the press part, and the bottom of support board still is equipped with four annular grooves that are annular equidistance respectively, and the inside of annular groove is equipped with the locating rod, and the inside fixed mounting of base is equipped with the limit stop, and the middle part of limit stop is equipped with the circular platform hole that corresponds with press part and is penetrated, and the top of limit stop is equipped with a plurality of location slots that correspond with locating rod, the utility model discloses the limit stop, locating rod, location slot, convex ring and annular groove that set up can limit the press stroke of button, avoid the sheet of metal excessive deformation because of excessive press, thereby reduce the bending amplitude of sheet of metal when pressing, reduce fatigue loss, prolong its life.

Description

Technical Field

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

[0002] A tactile switch is an electronic switch that allows the circuit to be switched on or off with a slight press and automatically resets when released. It mainly consists of a base, a button, terminals, and a spring.

[0003] When the button of an existing tactile switch is pressed, the spring is prone to excessive deformation due to excessive pressing force. Once the deformation exceeds its elastic limit, the spring will undergo permanent plastic deformation and cannot be reset. This will cause the tactile switch contacts to fail to make normal contact or disconnect, ultimately shortening its service life. Utility Model Content

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

[0005] To achieve the above objectives, this utility model provides the following technical solution: a long-life tactile switch, comprising a base, a button slidably mounted on the base, and a cover plate mounted on the top of the base. The base has a first terminal and a second terminal inside. A spring is mounted on the top of the first terminal. The bottom of the button has a support plate. The bottom of the support plate has a pressing part. The bottom of the support plate also has four equally spaced annular grooves. A positioning rod is located inside each annular groove. A limiting plate is fixedly mounted inside the base. A frustum-shaped hole corresponding to the pressing part is opened through the center of the limiting plate. Multiple positioning grooves corresponding to the positioning rods are opened on the top of the limiting plate. A raised ring is provided on the top edge of each positioning groove.

[0006] As a preferred embodiment of this utility model, the pressing part is a frustum structure.

[0007] In a preferred embodiment of this utility model, a diaphragm is installed inside the base, and the diaphragm is located between the limiting plate and the spring sheet.

[0008] As a preferred embodiment of this utility model, the top of the first terminal is provided with two first contacts, and the spring is connected to the first contacts. The top of the second terminal is provided with a second contact, and the second contact is located below the spring.

[0009] As a preferred embodiment of this utility model, the cover plate has a through hole in the middle for the button to pass through.

[0010] In a preferred embodiment of this utility model, one end of both the first terminal and the second terminal extends to the outer side of the base.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model can limit the pressing stroke of the button by setting the limiting plate, positioning rod, positioning groove, convex ring and annular groove, so as to avoid excessive deformation of the spring due to excessive pressing, thereby reducing the bending amplitude of the spring during pressing, reducing fatigue wear, and extending its service life. In addition, the positioning rod and positioning groove can play a positioning role for the button and the pressing part, preventing the button from shaking and ensuring that the pressing part is aligned with the spring, so as to ensure the sensitivity of the tactile switch trigger. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This utility model Figure 1 Exploded view;

[0015] Figure 4 This is a schematic diagram of the structure of the bottom of the button of this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the limiting plate of this utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the first terminal and the second terminal of this utility model.

[0018] In the diagram: 1. Base; 2. Cover plate; 3. Button; 4. Through hole; 5. First terminal; 6. Second terminal; 7. Diaphragm; 8. Positioning rod; 9. Annular groove; 10. Support plate; 11. Limiting plate; 12. Protruding ring; 13. Positioning groove; 14. First contact; 15. Second contact; 16. Spring; 17. Pressing part; 18. Frustum hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 6This utility model provides a technical solution: a long-life tactile switch, including a base 1, a button 3 slidably mounted on the base 1, and a cover plate 2 mounted on the top of the base 1. The base 1 has a first terminal 5 and a second terminal 6 inside. A spring 16 is mounted on the top of the first terminal 5. When the button 3 is pressed down, the button 3 causes the pressing part 17 to move downwards, squeezing the spring 16 and causing it to deform. The bottom of the spring 16 contacts the second contact 15, thereby connecting the first terminal 5 and the second terminal 6, thus completing the circuit. After the button 3 is released, the spring 16... 6. The reset button no longer contacts the second contact 15, thus disconnecting the circuit. A support plate 10 is provided at the bottom of button 3, which is slidably installed inside the base 1. This support plate 10 guides button 3, ensuring its stability. A pressing part 17 is provided at the bottom of the support plate 10. Four equally spaced annular grooves 9 are also provided at the bottom of the support plate 10. These grooves avoid the protruding ring 12, allowing the support plate 10 to fully fit with the limiting plate 11. A positioning rod 8 is provided inside the annular grooves 9. The limiting plate 11 is fixedly installed inside the base 1. When button 3 is pressed down to a certain extent, the support plate 10... Blocked by the limiting plate 11, the bottom of the positioning rod 8 is in contact with the bottom of the positioning groove 13, the top of the convex ring 12 is in contact with the top of the annular groove 9, and the pressing part 17 is in contact with the inner wall of the frustum hole 18, causing the button 3 to be unable to move further down. At this time, the bottom of the spring piece 16 is in contact with the second contact point 15, and the circuit is completed, which allows the pressing stroke of the button 3 to be limited, avoiding excessive pressing and causing excessive deformation of the spring piece 16, thereby reducing the bending amplitude of the spring piece 16 during pressing, reducing fatigue wear, and extending its service life. The middle of the limiting plate 11 has a through-hole opening for contact with the pressing part. The corresponding frustum hole 18 of the 17 allows the pressing part 17 to pass through the limiting plate 11. The top of the limiting plate 11 has multiple positioning grooves 13 corresponding to the positioning rod 8. The positioning rod 8 and the positioning groove 13 cooperate to position the button 3 and the pressing part 17, preventing the button 3 from shaking and allowing the pressing part 17 to be aligned with the spring 16 to ensure the sensitivity of the tactile switch. The top edge of the positioning groove 13 has a protruding ring 12, which limits one end of the positioning rod 8 so that the positioning rod 8 is always aligned with the positioning groove 13 when the button 3 is not pressed.

[0021] The pressing part 17 has a frustum structure, which allows the spring piece 16 to deform by applying only a small force to the button 3.

[0022] The base 1 has a diaphragm 7 installed inside. The diaphragm 7 serves to prevent dust and water from coming into contact with moisture or dust, which could cause short circuits or poor contact. The diaphragm 7 is located between the limiting plate 11 and the spring 16.

[0023] The first terminal 5 has two first contacts 14 on its top. The spring piece 16 is connected to the first contacts 14 and welded to the two first contacts 14. The second terminal 6 has a second contact 15 on its top. The second contact 15 is located below the spring piece 16 and is on the same central axis as the spring piece 16, so that the spring piece 16 can be aligned with the second contact 15 after being pressed and deformed.

[0024] The cover plate 2 has a through hole 4 in the middle for the button 3 to pass through. The button 3 can slide in the through hole 4 so that the user can press the button 3.

[0025] One end of both the first terminal 5 and the second terminal 6 extends to the outside of the base 1 to facilitate connection with external circuitry.

[0026] Specifically, when button 3 is pressed down, button 3 causes pressing part 17 and support plate 10 to move downward. Pressing part 17 pushes spring piece 16 to deform downward until support plate 10 is blocked by limit plate 11, causing button 3 to be unable to move downward. At this time, the bottom of spring piece 16 contacts the second contact 15, and the circuit is completed. After button 3 is released, spring piece 16 resets and no longer contacts the second contact 15, and the circuit is broken.

[0027] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-life tactile switch, comprising a base (1), a button (3) slidably mounted on the base (1), and a cover plate (2) mounted on the top of the base (1), wherein the base (1) is provided with a first terminal (5) and a second terminal (6) respectively, and a spring contact (16) is mounted on the top of the first terminal (5), characterized in that: The bottom of the button (3) is provided with a support plate (10), the bottom of the support plate (10) is provided with a pressing part (17), the bottom of the support plate (10) is also provided with four annular grooves (9) that are equidistant from each other in a ring, the inside of the annular grooves (9) is provided with a positioning rod (8), the inside of the base (1) is fixedly installed with a limiting plate (11), the middle of the limiting plate (11) is provided with a frustum hole (18) corresponding to the pressing part (17), the top of the limiting plate (11) is provided with multiple positioning grooves (13) corresponding to the positioning rods (8), and the top edge of the positioning grooves (13) is provided with a protruding ring (12).

2. The tactile switch with a long service life according to claim 1, characterized in that: The pressing part (17) has a frustum structure.

3. The tactile switch with a long service life according to claim 1, characterized in that: A diaphragm (7) is installed inside the base (1), and the diaphragm (7) is located between the limiting plate (11) and the spring sheet (16).

4. A tactile switch with a long service life according to claim 1, characterized in that: The first terminal (5) has two first contacts (14) on its top, and the spring piece (16) is connected to the first contacts (14). The second terminal (6) has a second contact (15) on its top, and the second contact (15) is located below the spring piece (16).

5. A tactile switch with a long service life according to claim 1, characterized in that: The cover plate (2) has a through hole (4) in the middle for the button (3) to pass through.

6. A tactile switch with a long service life according to claim 1, characterized in that: One end of the first terminal (5) and the second terminal (6) both extend to the outside of the base (1).

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