Automatic reset structure of key switch

Abstract

The utility model discloses an automatic reset structure of a key switch, which comprises a shell cylinder, two pairs of fixed contact pieces are arranged on the inner side wall of the shell cylinder, the distance between the two pairs of fixed contact pieces towards one end inside the shell cylinder is gradually increased from top to bottom, a key cap is embedded in the top of the shell cylinder, a movable contact piece with a cone-shaped structure is arranged at the bottom of the key cap, and the movable contact piece is connected with the movable contact piece. The movable contact piece can be synchronously contacted with the two pairs of fixed contact pieces for circuit conduction; springs are vertically assembled on the two sides of the shell cylinder, and the springs push the key caps to enable the movable contact pieces to be separated from the two pairs of fixed contact pieces. According to the utility model, the flat design is adopted, the installation height is reduced, the progressive compensation function is provided, the circuit can be switched on / off by pressing each time as much as possible, and the durability and reliability of the key switch are improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical switch technology, specifically to an automatic reset structure for a push-button switch. Background Technology

[0002] In electronic devices and electrical control systems, push-button switches are widely used as an important component for human-computer interaction in various applications, such as household appliances, industrial equipment, and instruments. The reliability and ease of use of push-button switches directly affect the user experience and the safety of the equipment.

[0003] After a push-button switch is pressed, it usually requires manual release by the user or the assistance of an external mechanism to reset it. Currently, traditional push-button switches typically use a spring structure to push the button to reset. However, in practical applications, it has been found that the spring used to push the button to reset is usually mounted below the button, which increases the overall height of the push-button switch and is not conducive to the assembly and use of small devices. Therefore, this application proposes an automatic reset structure for push-button switches to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an automatic reset structure for a push button switch. It adopts a flat design, which reduces the installation height, and has a progressive compensation function to ensure that the circuit can be connected / disconnected with each press, thereby improving the durability and reliability of the push button switch.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatic reset structure for a push-button switch includes a housing. Two pairs of fixed contacts are disposed on the inner wall of the housing. The distance between the two pairs of fixed contacts facing the inside of the housing gradually increases from top to bottom. A keycap is embedded in the top of the housing. A cone-shaped movable contact is disposed at the bottom of the keycap. The movable contact can synchronously contact the two pairs of fixed contacts to make the circuit conductive. Springs are vertically mounted on both sides of the housing. The springs push the keycap to disengage the movable contact from the two pairs of fixed contacts.

[0007] Preferably, a fixing sleeve is vertically fixed to the top of the outer side wall of the shell, and a pair of fixing sleeves are provided. The pair of springs are vertically assembled in the pair of fixing sleeves respectively. The fixing sleeves penetrate the side wall of the shell and communicate with the internal space of the shell. A pair of inner sleeves are vertically fixed to the outer circular surface of the keycap. The inner sleeves are embedded in the springs, and the top of the springs are embedded in the inner sleeves.

[0008] Preferably, a ring plate is provided at the top of the shell, and an installation hole is provided on the ring plate, through which the top of the fixing sleeve passes.

[0009] Preferably, the fixed contact includes a fixed block embedded in the inner wall of the shell, a fixed contact piece disposed at the end of the fixed block facing the inside of the shell, and a terminal block disposed at the end of the fixed block facing the outside of the shell. The terminal block extends through the side wall of the shell and extends outside the shell, and the shell passes through the fixed block and is connected to the fixed contact piece.

[0010] Preferably, the movable contact includes a vertical plate fixed to the lower surface of the keycap and movable contact pieces disposed on both sides of the vertical plate, wherein the spacing between a pair of movable contact pieces gradually decreases from top to bottom.

[0011] Preferably, a connecting block is provided at the bottom end of the vertical plate, and the bottom end of the movable contact piece is bent toward the vertical plate and screwed to the connecting block.

[0012] Preferably, the lower surface of the keycap is provided with spring pieces at positions on both sides of the vertical plate, and the spring pieces provide elastic support for the movable contact piece.

[0013] Preferably, a progressive bolt is threaded vertically through the bottom end of the shell, and a pillow block is provided at one end of the progressive bolt that extends into the shell.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes a spring mechanism. When the keycap is pressed down, the keycap pushes the vertical plate, causing a pair of movable contacts to engage with the fixed contacts in two pairs of fixed contacts. This, in conjunction with the control circuit, enables circuit conduction. When the keycap is released, the spring force pushes the inner sleeve, causing the keycap to move upward and reset. Because the springs are distributed on both sides of the housing, compared to the traditional key switch where the reset structure is located below the keycap, the overall design is more compact and flat, reducing installation height and making it more practical.

[0016] This invention features a structural design where the distance between two pairs of fixed contact pieces facing the inner end of the housing gradually increases from top to bottom, and the distance between a pair of movable contact pieces gradually decreases from top to bottom. This design provides a progressive compensation function during the pressing of the button switch, ensuring that the circuit can be connected / disconnected with each key press, thereby improving the durability and reliability of the button switch.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the shell of this utility model;

[0020] Figure 3This is a structural schematic diagram of the keycap and movable contact of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the fixed contact component of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the fixed sleeve, inner sleeve, and spring of this utility model.

[0023] In the diagram: 1. Shell; 2. Keycap; 3. Fixed contact; 4. Fixed sleeve; 5. Inner sleeve; 6. Ring plate; 7. Movable contact; 8. Advancing bolt; 9. Pillow block; 10. Vertical plate; 11. Connecting block; 12. Movable contact piece; 13. Spring piece; 14. Fixed block; 15. Terminal block; 16. Fixed contact piece; 17. Spring. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "length," "width," "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, 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. The various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0025] Example

[0026] Please see Figures 1 to 5 The present invention preferably provides the following technical solution: an automatic reset structure for a push-button switch, comprising a housing 1, two pairs of fixed contacts 3 disposed on the inner wall of the housing 1, a keycap 2 embedded in the top of the housing 1, and a conical movable contact 7 disposed at the bottom of the keycap 2, the movable contact 7 being able to synchronously contact the two pairs of fixed contacts 3 to establish circuit conduction, and springs 17 vertically mounted on both sides of the housing 1, the springs 17 pushing the keycap 2 to disengage the movable contact 7 from the two pairs of fixed contacts 3, and the two pairs of fixed contacts 3 then reconnecting with the desired circuit. When the keycap 2 is pressed down, the keycap 2 pushes the movable contact 7, causing a pair of movable contact pieces 12 to contact the fixed contact pieces 16 in the two pairs of fixed contact pieces 3 respectively. This, in conjunction with the control circuit, enables the circuit to be turned on. After the keycap 2 is released, the spring 17 pushes the inner sleeve 5 to move the keycap 2 upward and reset it. Since the spring 17 is distributed on both sides of the shell 1, compared with the traditional key switch where the reset structure is arranged below the keycap 2, the structure is compact and flat, reducing the installation height.

[0027] In this embodiment, a fixed sleeve 4 is vertically fixed to the top of the outer side wall of the shell 1. A pair of fixed sleeves 4 are provided, and a pair of springs 17 are vertically assembled inside each pair of fixed sleeves 4. The fixed sleeves 4 penetrate the side wall of the shell 1 and communicate with the internal space of the shell 1. A pair of inner sleeves 5 are vertically fixed to the outer surface of the keycap 2. The inner sleeves 5 are embedded inside the springs 17, with the top ends of the springs 17 embedded inside the inner sleeves 5. A ring plate 6 is provided at the top of the shell 1, and mounting holes are provided on the ring plate 6. The top ends of the fixed sleeves 4 penetrate the ring plate 6.

[0028] In this embodiment, the fixed contact 3 includes a fixing block 14 embedded in the inner wall of the shell 1, a fixing contact piece 16 disposed at the end of the fixing block 14 facing the inside of the shell 1, and a terminal post 15 disposed at the end of the fixing block 14 facing the outside of the shell 1. The terminal post 15 extends through the side wall of the shell 1 and extends out of the shell 1. The shell 1 passes through the fixing block 14 and is connected to the fixing contact piece 16. The fixed contact 3 is connected to the circuit to be controlled through the terminal post 15 extending out of the shell 1. The movable contact 7 includes a vertical plate 10 fixed vertically on the lower surface of the keycap 2 and movable contact pieces 12 disposed on both sides of the vertical plate 10. A connecting block 11 is provided at the bottom end of the vertical plate 10. The bottom end of the movable contact piece 12 is bent towards the vertical plate 10 and screwed to the connecting block 11.

[0029] In a further embodiment, the distance between the two pairs of fixed contacts 3 facing the inner end of the housing 1 gradually increases from top to bottom, and the distance between the pair of movable contacts 12 gradually decreases from top to bottom. With this structural design, during the pressing of the button switch, the movable contacts 12 can continuously contact the fixed contacts 16 in the fixed contacts 3, which has a progressive compensation function, and ensures as much as possible that the circuit can be connected / disconnected every time the keycap 2 is pressed.

[0030] In this embodiment, spring pieces 13 are provided on the lower surface of the keycap 2 at the positions on both sides of the vertical plate 10. The spring pieces 13 provide elastic support for the movable contact piece 12, ensuring that the movable contact piece 12 can be elastically reset and make good contact with the fixed contact piece 16.

[0031] In a further embodiment, a progressive bolt 8 is threaded vertically through the bottom end of the housing 1. A pillow block 9 is provided at one end of the progressive bolt 8 that extends into the housing 1. The progressive bolt 8 and the pillow block 9 can limit the downward stroke of the keycap 2, preventing the keycap 2 from being pressed down too much and causing excessive compression between the movable contact piece 12 and the fixed contact piece 16. Furthermore, by turning the progressive bolt 8 toward the outside of the housing 1, the limiting length of the pressing stroke of the keycap 2 can be adjusted, thereby achieving progressive compensation contact between the movable contact piece 12 and the fixed contact piece 16.

[0032] In use, the two pairs of fixed contacts 3 are connected to the circuit to be controlled via terminals 15 extending out of the housing 1. When the keycap 2 is pressed down, the keycap 2 pushes the vertical plate 10, causing a pair of movable contacts 12 to contact the fixed contacts 16 of the two pairs of fixed contacts 3 respectively. This, in conjunction with the control circuit, enables circuit conduction. After the keycap 2 is released, the spring 17 pushes the inner sleeve 5, causing the keycap 2 to move upward and reset. Since the springs 17 are distributed on both sides of the housing 1, compared with the traditional key switch where the reset structure is located below the keycap 2, the overall design is more compact and flat, reducing the installation height. Furthermore, the spacing between the two pairs of fixed contacts 3 facing the inside of the housing 1 gradually increases from top to bottom, and the spacing between the pair of movable contacts 12 gradually decreases from top to bottom. During the key switch pressing process, there is a progressive compensation function, ensuring that the circuit can be connected / disconnected with each press of the keycap 2, improving the durability and reliability of the key switch.

[0033] The foregoing, in conjunction with the embodiments and accompanying drawings, has clearly and completely described the concept, specific structure, and technical effects of this utility model, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages mentioned herein do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions.

[0034] The above description of the specific embodiments of this utility model is only used to further illustrate this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made to this utility model by technical engineers based on the above description of the utility model shall fall within the scope of protection of this utility model.

Claims

1. An automatic reset structure for a push-button switch, comprising a housing (1), characterized in that: Two pairs of fixed contact members (3) are provided on the inner wall of the shell (1). The distance between the two pairs of fixed contact members (3) facing the inside of the shell (1) gradually increases from top to bottom. A keycap (2) is embedded in the top of the shell (1). A cone-shaped movable contact member (7) is provided at the bottom of the keycap (2). The movable contact member (7) can synchronously contact the two pairs of fixed contact members (3) to make the circuit conduction. Springs (17) are vertically mounted on both sides of the shell (1). The springs (17) push the keycap (2) to disengage the movable contact (7) from the two pairs of fixed contacts (3).

2. The automatic reset structure of a push-button switch according to claim 1, characterized in that: A fixed sleeve (4) is vertically fixed to the top of the outer wall of the shell (1). A pair of fixed sleeves (4) are provided. A pair of springs (17) are vertically assembled in the pair of fixed sleeves (4). The fixed sleeves (4) penetrate the side wall of the shell (1) and communicate with the internal space of the shell (1). A pair of inner sleeves (5) are vertically fixed on the outer surface of the keycap (2). The inner sleeves (5) are embedded in the springs (17). The top of the springs (17) is embedded in the inner sleeves (5).

3. The automatic reset structure of a push-button switch according to claim 2, characterized in that: The top of the shell (1) is provided with a ring plate (6), and the ring plate (6) has an installation hole. The top of the fixing sleeve (4) passes through the ring plate (6).

4. The automatic reset structure of a push-button switch according to claim 1, characterized in that: The fixed contact (3) includes a fixed block (14) embedded in the inner wall of the shell (1), a fixed contact piece (16) disposed at one end of the fixed block (14) facing the inside of the shell (1), and a terminal (15) disposed at one end of the fixed block (14) facing the outside of the shell (1). The terminal (15) extends out of the shell (1) through the side wall of the shell (1), and the shell (1) is connected to the fixed contact piece (16) through the fixed block (14).

5. The automatic reset structure of a push-button switch according to claim 4, characterized in that: The movable contact (7) includes a vertical plate (10) fixed vertically on the lower surface of the keycap (2) and movable contact pieces (12) arranged on both sides of the vertical plate (10). The distance between a pair of movable contact pieces (12) gradually decreases from top to bottom.

6. The automatic reset structure of a push-button switch according to claim 5, characterized in that: The bottom end of the vertical plate (10) is provided with a connecting block (11), and the bottom end of the movable contact piece (12) is bent toward the vertical plate (10) and screwed to the connecting block (11).

7. The automatic reset structure of a push-button switch according to claim 6, characterized in that: The keycap (2) has a spring piece (13) located on both sides of the vertical plate (10) on its lower surface. The spring piece (13) provides elastic support for the movable contact piece (12).

8. The automatic reset structure of a push-button switch according to claim 1, characterized in that: The bottom end of the shell (1) is provided with a vertical threaded advance bolt (8), and a pillow block (9) is provided at one end of the advance bolt (8) that extends into the shell (1).

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