A durable microswitch

Abstract

The utility model discloses a kind of durable microswitch, and its technical solution main points include shell, the shell bottom is provided with contact piece, first elastic sheet, second elastic sheet are installed in the shell, first trigger structure is provided on the first elastic sheet, second trigger structure is provided on the second elastic sheet, insulating sheet is arranged between the first elastic sheet and second elastic sheet, opening structure is provided on the insulating sheet and is adapted with first trigger structure, opening structure can make first trigger structure provide trigger feedback when triggering;The first elastic sheet is bent and is dome-shaped, and the first trigger structure includes the contact piece portion bent downward. The utility model is bent by the setting of contact piece portion, and the total deformation ability of first elastic sheet is overlapped by first elastic sheet body and contact piece portion, to improve overall deformation stroke and bearing capacity, so that elastic sheet is directly pressed by upper and lower components simultaneously.

Description

Technical Field

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

[0002] Currently, a tactile switch is a miniaturized mechanical push-button electronic switch that achieves circuit switching by triggering the deformation of an elastic component through a pressing operation and provides clear mechanical feedback. Its structure usually includes a shell, a movable elastic component, a fixed contact assembly, and a pressing transmission component. It is widely used in consumer electronics, automotive electronics, and home appliances, and can provide users with the ability to switch circuits on and off by pressing in devices that require high-frequency, short-stroke pressing control. The structure of the double-spring tactile switch can also provide step-by-step operation support for the device, meeting the needs of precise control.

[0003] However, the existing technologies mentioned above still have some drawbacks. When the existing double-spring tactile switches are in operation, the spring body in the middle is directly sandwiched between the upper and lower parts, forming a "sandwich"-like compression structure, which makes it more prone to plastic deformation. Moreover, after the spring body in the middle is pressed to the conducting state, it will continue to be pressed. This excessive pressing further increases the risk of damage to the components and affects their service life. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a durable tactile switch.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a housing, with a contact piece at the bottom of the housing. A first spring and a second spring are installed inside the housing. The first spring has a first trigger structure, and the second spring has a second trigger structure. An insulating sheet is provided between the first and second springs. The insulating sheet has an opening structure adapted to the first trigger structure, which allows the first trigger structure to provide trigger feedback when triggered. The first spring is bent into a dome shape, and the first trigger structure includes a downwardly bent connecting portion.

[0006] The present invention is further configured such that the end of the connecting piece is continuously bent to form a downward protruding structure.

[0007] The present invention is further configured such that: the opening structure is provided with a stop protrusion near the receiving plate portion.

[0008] The present invention is further configured such that: at least two of the connecting pieces are provided, and all the connecting pieces are symmetrically distributed at equal angles with the dome of the first spring piece as the center.

[0009] The present invention is further configured such that: the second triggering structure includes a dome-shaped protrusion disposed at the center of the second spring piece.

[0010] The present invention is further configured such that the outer contour of the protrusion is provided with an annular groove.

[0011] In summary, this utility model has the following beneficial effects:

[0012] 1. By setting up the connecting piece, the total deformation capacity of the first spring piece is superimposed by the first spring piece body and the connecting piece, thereby improving the overall deformation stroke and load-bearing capacity. The first spring piece mainly bears the downward pressure of the upper component, while the connecting piece bears the force of the lower component, so that the spring piece is directly clamped by the upper and lower components at the same time.

[0013] 2. The shortening of the first spring's trigger press stroke by the connecting part reduces the force on the first spring, which helps extend the service life of the first spring.

[0014] 3. The protruding structure at the end of the contact piece allows the contact piece to withstand more force during further pressing after the first connection, protecting the first spring from damage and effectively solving the problem of the first spring being damaged by excessive pressing during two deformations.

[0015] 4. When the dome-shaped protrusion of the second spring is fully pressed, it quickly changes from an "upward convex" state to a "downward concave" state, which can disperse the deformation transmission force and prevent the first spring from being directly clamped by the upper and lower parts at the same time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0017] Figure 2 This is a schematic diagram of the first working state in this embodiment;

[0018] Figure 3 This is a schematic diagram of the second working state in this embodiment;

[0019] Reference numerals: 1. Housing; 11. Contact piece; 2. First spring piece; 21. Connecting piece; 211. Protruding structure; 3. Second spring piece; 31. Protrusion; 32. Annular groove; 4. Insulating sheet; 41. Stop protrusion. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This embodiment discloses a durable tactile switch, such as... Figures 1 to 3As shown, the device includes a housing 1, with a contact piece 11 at the bottom. A first spring 2 and a second spring 3 are installed inside the housing 1. The first spring 2 has a first trigger structure, and the second spring 3 has a second trigger structure. An insulating sheet 4 is positioned between the first spring 2 and the second spring 3. The insulating sheet 4 has an opening structure adapted to the first trigger structure. The insulating sheet 4 isolates the first spring 2 and the second spring 3 to prevent accidental short circuits, but allows electrical connection through the opening during triggering. The opening structure allows the first trigger structure to provide trigger feedback, giving the user clear trigger confirmation and improving the user experience. The first spring 2 is bent into a dome shape, providing good elasticity and reset capability, ensuring the switch quickly returns to its original shape after being pressed, improving durability. The first trigger structure includes a downwardly bent contact portion 21. The contact portion 21 moves downward synchronously with the first spring 2, contacting and connecting the second spring 3 to form a circuit. The connecting piece 21 is formed by bending the first spring piece 2 downwards. On the one hand, it shortens the spatial distance between the first spring piece 2 and the contact point with the second spring piece 3, allowing the first spring piece 2 to achieve conduction with the second spring piece 3 with only slight deformation, which is sensitive and efficient. On the other hand, the connecting piece 21 itself acts as an additional deformation unit, which can further undergo elastic bending when subjected to force. This means that the total deformation capacity of the first spring piece 2 is composed of the superposition of the first spring piece 2 body and the connecting piece 21, thereby improving its overall deformation stroke and load-bearing capacity, and enabling it to withstand greater external forces.

[0022] Further improvements include a continuously bent end of the contact portion 21 forming a downward-facing protruding structure 211. During operation, the first spring 2 deforms and bends downward under external pressure, causing the contact portion 21 to descend and contact the second spring 3. Under the reaction force, the continuously bent protruding structure 211 at the end of the contact portion 21 preferentially undergoes elastic deformation, successfully transferring the deformation and stress concentration point from the weakest root of the connection between the contact portion 21 and the spring body to the protruding structure 211 itself. This prevents metal fatigue fracture at the root due to repeated stress cycles, improving the switch's durability. The downward-bending shape of the protruding structure 211 naturally forms an arc-shaped contact surface facing the second spring 3, ensuring stable and reliable surface or line contact during triggering. This effectively increases the conductive area, reduces contact resistance, and guarantees the reliability of circuit switching.

[0023] Further improvements include a stop protrusion 41 near the contact piece 21 on the opening structure. Initially, the end of the contact piece 21 is blocked by the stop protrusion 41 and cannot pass directly. The user needs to increase the pressing pressure to allow the first spring piece 2 to continue pressing down. This process allows it to accumulate more elastic potential energy, thus providing the operator with a clear sense of resistance. When the pressure exceeds a critical point, the end of the contact piece 21 undergoes instantaneous elastic deformation, quickly "sliding" past the stop protrusion 41. At the moment of passing, the accumulated elastic potential energy is suddenly released, driving the contact piece 21 to rebound at high speed and triggering vibration, thereby producing a clear "click" sound, providing reliable audible confirmation of triggering. Simultaneously, the dynamic process of "resistance-breakthrough" allows the user's fingers to perceive a distinct sense of breakthrough. The entire triggering process thus possesses richer dynamic variations, significantly improving the layering and quality of the operating feel.

[0024] Furthermore, the connecting piece 21 is provided in at least two parts, and all the connecting pieces 21 are symmetrically distributed at equal angles with the dome apex of the first spring piece 2 as the center. When the switch is pressed, the multiple symmetrically distributed connecting pieces 21 are subjected to force simultaneously, evenly distributing the pressure, making the deformation of the first spring piece 2 more stable, improving the uniformity of the trigger force distribution, avoiding stress concentration at a single point, enhancing the stability and consistency of the switch; improving the feel, making pressing smoother.

[0025] Further improvements include a dome-shaped protrusion 31 located at the center of the second spring piece 3. This dome-shaped protrusion 31 has a stable deformation threshold, ensuring precise contact with the receiving portion 21 of the first spring piece 2 during half-press, thus maintaining stable conductivity between the first spring piece 2 and the second spring piece 3. During full-press, the protrusion 31 abruptly changes from an "upward convex" state to a "downward concave" state, transmitting the overall deformation force of the second spring piece 3 and preventing the first spring piece 2 from being directly clamped by both upper and lower components simultaneously.

[0026] Further improvements include an annular groove 32 on the outer contour of the protrusion. The metal material in the area where the annular groove 32 is located is thinner than the surrounding area, providing higher elastic deformation capability. Its elastic deformation can absorb the instantaneous impact during the pressing process, reduce the instantaneous force on the protrusion 31, and prevent it from undergoing plastic deformation such as collapse due to long-term high-frequency force, thereby improving the durability of the protrusion 31. When the second spring 3 is subjected to pressure, the annular groove 32 will undergo slight elastic deformation along its own width direction, so that the stress is evenly distributed along the circumference, avoiding the "pressing offset" phenomenon caused by excessive stress on one side of the second spring 3, and ensuring the synchronicity and feedback consistency of the two-stage rebound action.

[0027] Working principle of this utility model

[0028] During operation, pressing the switch button causes the first spring piece 2 to move downwards under pressure, transmitting the pressure downwards. When the pressure reaches the contact portion 21 of the first spring piece 2, the contact portion 21 deforms and moves downwards. In the initial stage of movement, the protruding structure 211 at the end of the contact portion 21 is blocked by the stop protrusion 41 on the opening of the insulating sheet 4, forming an abutment and providing the user with a sense of resistance. As pressure continues to be applied, when the pressure exceeds a critical point, the protruding structure 211 of the contact portion 21 undergoes instantaneous elastic deformation, quickly "sliding" past the stop protrusion 41. At the moment of passing, the accumulated elastic potential energy is suddenly released, driving the contact portion 21 to rebound at high speed and causing vibration, thus producing the first clear "click" sound. At the same time, the protruding structure 211 of the ejected contact portion 21 makes stable contact with the second spring piece 3 below through the opening of the insulating sheet 4 and conducts electricity, achieving the first conduction.

[0029] As pressure continues to be applied, the pressure exerted by the first spring 2 on the dome-shaped protrusion 31 of the second spring 3 increases, causing the dome-shaped protrusion 31 to move downwards under force. When its deformation reaches a threshold, the dome-shaped protrusion 31 will abruptly change from an "upward convex" state to a "downward concave" state, accompanied by a second "click" sound. At this point, the second spring 3 moves downwards as a whole, making contact with the contact piece 11 at the bottom of the housing 1, thus achieving a second electrical connection.

[0030] After the pressure is released, the first spring 2 and the second spring 3 will reset sequentially under their own elasticity. The connection between the contact part 21 of the first spring 2 and the second spring 3, as well as the connection between the second spring 3 and the contact piece 11, will be separated, and the circuit will be completely disconnected.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A durable tactile switch, comprising a housing (1), wherein a contact piece (11) is provided at the bottom of the housing (1), and a first spring (2) and a second spring (3) are installed inside the housing (1), characterized in that: The first spring (2) is provided with a first trigger structure, the second spring (3) is provided with a second trigger structure, and an insulating sheet (4) is provided between the first spring (2) and the second spring (3). The insulating sheet (4) is provided with an opening structure that is compatible with the first trigger structure. The opening structure allows the first trigger structure to provide trigger feedback when it is triggered. The first spring (2) is bent into a dome shape, and the first trigger structure includes a downwardly bent connecting part (21).

2. A durable tactile switch according to claim 1, characterized in that: The end of the connecting piece (21) is continuously bent to form a downward protruding structure (211).

3. A durable tactile switch according to claim 2, characterized in that: The opening structure is provided with a stop protrusion (41) near the receiving part (21).

4. A durable tactile switch according to claim 1, characterized in that: The connecting piece (21) is provided in at least two parts, and all the connecting pieces (21) are symmetrically distributed at equal angles with the dome of the first spring piece (2) as the center.

5. A durable tactile switch according to claim 1, characterized in that: The second triggering structure includes a dome-shaped protrusion (31) located at the center of the second spring (3).

6. A durable tactile switch according to claim 5, characterized in that: The outer contour of the protrusion (31) is provided with an annular groove (32).

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