A stable key structure
By designing an independent T-shaped trigger shaft in the key structure separates from the press head, and stabilizing the shaft body movement through point contact and guide cavity structure, the problem of signal instability caused by shaking of the traditional key is solved, and a higher accuracy signal output is achieved.
Patent Information
- Application Number
- CN202421534142.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-01
AI Technical Summary
When traditional buttons are pressed, due to the different pressing positions of the user's fingers, the pressing head is likely to shake, which in turn makes the signal generated by electronic components unstable and inaccurate, making it difficult to meet the needs of high-performance buttons.
A stable button structure is designed, using an independent T-shaped trigger shaft to separate from the pressing head, and the shaft top of the trigger shaft is contacted at the center of the bottom of the pressing head, forming point contact, ensuring concentrated pressure conduction, reducing the impact of shaking, and stabilizing the up and down movement of the shaft body through the guide cavity structure.
It effectively reduces the impact of key shaking on trigger electronic components, improves the accuracy and stability of the output signal, reduces costs, and avoids the limitations of improving mechanical precision to reduce shaking.
Smart Images
Figure CN222749366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of switches, in particular to a stable key structure. Background Art
[0002] Push button switches are widely used as a common switch. The user presses the switch shaft (also called the push head) downward, triggering the electronic component (which can be a metal shrapnel, pressure sensor, light-emitting diode, Hall element, etc.) to generate a corresponding switch signal. When the user releases the hand, the push head resets upward under the action of the reset spring.
[0003] The traditional key structure is designed to directly trigger the electronic components to generate signals through the pressing head. However, when the pressing head is pressed, the user's finger presses in different positions, which easily causes the pressing head to shake. This shaking will cause the electronic components to generate unstable and inaccurate signals, which is a difficult technical obstacle to overcome for high-performance key switches. If we simply improve the machining precision of the key mechanical structure to reduce the shaking, the cost is too high and the actual effect of reducing the shaking is very limited.
[0004] The motivation of the utility model is to reduce the shaking problem of the key switch as much as possible at a low cost by re-constructing the structure of the key. Utility Model Content
[0005] In view of the above problems, the utility model aims to provide a stable key structure which can effectively reduce shaking.
[0006] To achieve the technical purpose, the solution of the utility model is: a stable key structure for triggering an electronic component to generate a signal, including a key seat, a reset spring, and a pressing head that can move up and down in the key seat, and also includes an independent T-shaped trigger shaft, which is composed of a shaft top and a shaft body, and the trigger shaft is abutted with its shaft top at the bottom center position of the pressing head; a guide cavity is provided on the key seat, and the shaft body can be assembled in the guide cavity so as to move up and down; the reset spring is sleeved outside the shaft body, one end of the reset spring abuts on the key seat, and the other end abuts on the bottom of the shaft top; pressing down the pressing head drives the trigger shaft to overcome the tension of the reset spring and move downward, thereby triggering the electronic component to generate a signal.
[0007] Preferably, the top surface of the shaft is a curved surface structure, and the top of the shaft is in point contact with the bottom of the pressing head.
[0008] Preferably, the electronic element is a light-transmitting tube assembly consisting of a light-emitting element and a photosensitive element, and the up and down movement of the shaft can affect the change of the light flux received by the photosensitive element from the light-emitting element and thus generate a signal.
[0009] Preferably, a through hole is provided on the guide cavity, and the photosensitive element can receive light emitted by the light-emitting element through the through hole; a light-transmitting hole is provided on the shaft body; when the light-transmitting hole of the shaft body moves to the through hole position of the guide cavity, the photosensitive element receives light from the light-emitting element.
[0010] Preferably, the shaft body is a hollow structure, and a grating piece made of an opaque material is inserted and embedded in the hollow structure of the shaft body, and the grating piece is provided with a light-transmitting conical long hole.
[0011] Preferably, the two ends of the grating sheet are provided with wedge-shaped elastic ends. Preferably, the bottom of the shaft top is also provided with a spring fixing column, and the top end of the reset spring is sleeved on the spring fixing column.
[0012] Preferably, a pair of limit hooks extend from both sides of the pressing head respectively, and a hook groove is provided in the key base at a position corresponding to the limit hook. When the pressing head is reset, the limit hook is stopped by the hook groove and cannot continue to move upward.
[0013] Preferably, guide grooves are respectively provided on the inner corners of the key base, and the outer corners of the pressing head match the guide grooves.
[0014] The beneficial effect of the utility model is that the utility model triggers the electronic component to generate a signal through a uniquely designed trigger shaft, so that it is independent of the pressing head that is prone to shaking when pressed, and abuts against the bottom center of the pressing head to form a point contact, so that the unstable pressing of the pressing head can only transmit the downward pressure to the trigger shaft, which minimizes and blocks the influence of the shaking of the pressing head on the trigger shaft. Combined with structures such as the guide cavity, the stable up and down movement of the trigger shaft is guaranteed as much as possible, reducing the influence of the key shaking, so that the output signal has higher accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is an exploded view of the utility model;
[0016] Figure 2 It is a side view of the pressing head in the utility model;
[0017] Figure 3 It is a structural schematic diagram of the grating axis and the grating component in the utility model;
[0018] Figure 4 It is a structural schematic diagram of the grating axis and the grating component in the utility model;
[0019] Figure 5 It is a structural schematic diagram of the key base in the utility model;
[0020] Figure 6 It is a cross-sectional view of the key base in the utility model;
[0021] Figure 7 It is a cross-sectional view of the pressing head of the utility model when it is not pressed;
[0022] Figure 8 It is a cross-sectional view of the pressing head of the present invention when being pressed.
[0023] In the figure: 1, pressing head; 101, limiting hook; 2, trigger shaft; 201, shaft top; 202, spring fixing column; 203, shaft body; 204, light-transmitting hole; 3, reset spring; 4, key base; 401, guide cavity; 402, through hole; 403, upper part of guide platform; 404, lower part of guide platform; 405, hook groove; 406, guide groove; 5, grating piece; 501, wedge-shaped elastic end; 502, tapered long hole. DETAILED DESCRIPTION
[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In order to clearly and completely describe the technical solution, the following embodiments are selected for illustration; the following embodiments are part of the embodiments of the utility model; based on this application, other embodiments obtained without creative work are all within the scope of protection of the utility model.
[0025] In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of clearly describing the present embodiment, rather than indicating or implying that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present application. At the same time, "first" and "second" in the embodiments are only used for distinguishing description purposes, and do not represent or imply relative importance.
[0026] like Figure 1-8 As shown, the utility model relates to a stable key structure for triggering an electronic component to generate a signal. The key structure comprises a key base 4, a reset spring 3, and a pressing head 1 which can move up and down in the key base 4.
[0027] The core point of the utility model is to design a T-shaped trigger shaft 2 independent of the pressing head 1, through which the electronic components are triggered to generate a switch signal, rather than directly triggered by the pressing head as in the traditional structure. The purpose of this is to effectively prevent and reduce the impact of the shaking of the pressing head 1 on the triggering of the electronic components.
[0028] The trigger shaft 2 is composed of a shaft top 201 and a shaft body 203. The trigger shaft 2 is abutted against the bottom center position of the pressing head 1 with its shaft top 201. Such a connection structure ensures that the shaking of the pressing head when the pressing head is pressed at an uncertain position by the user (such as any edge of the keycap / pressing head) will not be transmitted to the trigger shaft 2, thereby ensuring to the greatest extent possible that the pressing of the pressing head 1 can only concentrate the downward pressure on the trigger shaft 2.
[0029] In addition, in order to further ensure the smooth and stable up and down movement of the trigger shaft 2, a guide cavity 401 is provided on the key base 4, and the shaft body 203 can be assembled in the guide cavity 401 so as to move up and down, ensuring that the shaft body 203 maintains linear motion during the movement.
[0030] The reset spring 3 in the solution of the utility model is sleeved outside the shaft body 203, one end of the reset spring 3 abuts on the key seat 4, and the other end abuts on the bottom of the shaft top 201; pressing the pressing head 1 down drives the trigger shaft 2 to overcome the tension of the reset spring 3 and go downward, thereby triggering the electronic component to generate a signal. The shaft top 201 of the trigger shaft 2 abuts against the pressing head 1, and transmits the force applied by the user to the pressing head 1 to the shaft body 203, thereby triggering the electronic component to generate a signal. By separating the trigger shaft 2 of the trigger structure from the pressing head 1 and further stabilizing the movement of the trigger shaft 2 itself, while effectively blocking the transmission of shaking, the movement of the trigger shaft 2 is further stabilized, so that the key of the utility model can effectively reduce the triggering effect caused by shaking, ensuring that the output signal has higher accuracy and stability.
[0031] In the solution of the present invention, the surface of the shaft top 201 is a curved structure, and the shaft top 201 is in point contact with the bottom of the pressing head 1, so that when the pressing head 1 is subjected to unstable pressing, it can only concentrate the downward pressure to the trigger shaft 2, thereby minimizing and preventing the influence of the shaking of the pressing head 1 on the trigger shaft 2.
[0032] The utility model provides an optical key, in which the electronic component is a light-transmitting tube assembly composed of a light-emitting element and a photosensitive element. The up and down movement of the shaft 203 can affect the change of the light flux received by the photosensitive element from the light-emitting element and thus generate a signal. When the key is pressed, the shaft 203 moves downward, blocking or changing the light path between the light-emitting element and the photosensitive element, thereby changing the light flux received by the photosensitive element.
[0033] In the solution of the utility model, a through hole 402 is opened on the guide cavity 401, and the photosensitive element can receive the light emitted by the light-emitting element through the through hole 402. A light-transmitting hole 204 is opened on the shaft body 203. When the light-transmitting hole 204 of the shaft body moves to the position of the through hole 402 of the guide cavity, the photosensitive element receives the light from the light-emitting element.
[0034] Furthermore, in order to adjust the key signal output more accurately, a grating piece 5 is further provided in the solution of the utility model. The shaft body 203 is a hollow structure. The grating piece 5 is embedded and inserted into the hollow structure of the shaft body 203. The grating piece 5 is made of an opaque material, and a light-transmissive tapered long hole 502 is provided on the grating piece 5. When the shaft body 203 moves, the grating piece 5 also moves accordingly, so that when the tapered long hole 502 moves through the through hole 402 of the guide cavity, the opening area of the through hole 402 corresponding to the light path of the tapered long hole 502 also changes accordingly, so that the light flux received by the photosensitive element to the light-emitting element changes accordingly, and more accurate signal feedback is obtained.
[0035] The grating sheet of the present application is not limited to conical long holes. The grating sheet may also have regularly arranged light-transmitting and light-impermeable parts. These parts will block or allow light to pass through as the grating sheet moves, thereby achieving different light flux control effects.
[0036] As a specific embodiment of the present application, wedge-shaped elastic ends 501 are provided at both ends of the grating piece 5 , and the wedge-shaped elastic ends 501 facilitate expansion of the grating piece 5 after being embedded in the shaft body 203 , so that the grating piece 5 can be firmly embedded in the shaft body 203 .
[0037] As a specific embodiment of the present application, a guide platform is constructed at the bottom of the keybed 4, the guide cavity 401 is located at the central hollow position of the guide platform, the guide platform is composed of an upper part and a lower part, and the cross section of the guide platform is preferably a "convex" structure, and the reset spring 3 is sleeved on the upper part 403 of the guide platform and abuts against the lower part 404 of the guide platform. The setting of the guide platform is conducive to reducing the length of the reset spring 3, making it more suitable for the key structure, thereby ensuring the stability of the key operation.
[0038] Further, for ease of assembly, a spring fixing column 202 is provided at the bottom of the shaft top 201 for fixing the top end of the return spring 3, and the top end of the return spring 3 is sleeved on the spring fixing column 202. The top end of the return spring 3 is sleeved on the spring fixing column 202, and the bottom end is sleeved on the upper part 403 of the guide platform.
[0039] In order to limit the pressing head 1, a pair of limit hooks 101 extend from both sides of the pressing head 1, and a hook groove 405 is provided in the key base 4 corresponding to the position of the limit hook 101. When the pressing head 1 is reset, the limit hook 101 is stopped by the hook groove 405 and cannot continue to move upward, thereby avoiding the problem of key rebound overshoot.
[0040] Furthermore, in order to keep the pressing head 1 moving up and down stably and smoothly, guide grooves 406 are respectively provided on the inner corners of the key base 4, and the outer corners of the pressing head 1 match the guide grooves 406 to form a stable sliding system, further improving the stability of the up and down movement of the pressing head 1.
[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.
Claims
1. A stable key structure for triggering an electronic component to generate a signal, comprising a key base, a return spring, and a pressing head that can move up and down in the key base, characterized in that: It also includes an independent T-shaped trigger shaft, which consists of a shaft top and a shaft body, and the trigger shaft abuts against the bottom center position of the pressing head with its shaft top; a guide cavity is provided on the key seat, and the shaft body can be assembled in the guide cavity so as to move up and down; the reset spring is sleeved outside the shaft body, one end of the reset spring abuts against the key seat, and the other end abuts against the bottom of the shaft top; pressing down the pressing head drives the trigger shaft to overcome the tension of the reset spring and move downward, thereby triggering the electronic component to generate a signal.
2. The stable key structure according to claim 1, characterized in that: The top surface of the shaft is a curved surface structure, and the top of the shaft is in point contact with the bottom of the pressing head.
3. The stable key structure according to claim 2, characterized in that: The electronic element is a light-transmitting tube assembly composed of a light-emitting element and a photosensitive element. The up and down movement of the shaft can change the light flux received by the photosensitive element from the light-emitting element and thus generate a signal.
4. The stable key structure according to claim 3, characterized in that: The guide cavity is provided with a through hole, through which the photosensitive element can receive light emitted by the light-emitting element; the shaft body is provided with a light-transmitting hole; when the light-transmitting hole of the shaft body moves to the through hole position of the guide cavity, the photosensitive element receives light from the light-emitting element.
5. The stable key structure according to claim 4, characterized in that: The shaft body is a hollow structure, and a grating piece made of an opaque material is inserted and embedded in the hollow structure of the shaft body. The grating piece is provided with a light-transmitting conical long hole.
6. The stable key structure according to claim 5, characterized in that: The two ends of the grating sheet are provided with wedge-shaped elastic ends.
7. The stable key structure according to any one of claims 2 to 6, characterized in that: A spring fixing column is also provided at the bottom of the shaft top, and the top end of the return spring is sleeved on the spring fixing column.
8. The stable key structure according to any one of claims 2 to 6, characterized in that: A pair of limit hooks are respectively extended from both sides of the pressing head, and a hook groove is arranged in the key seat at a position corresponding to the limit hook. When the pressing head is reset, the limit hook is stopped by the hook groove and cannot continue to move upward.
9. The stable key structure according to any one of claims 2 to 6, characterized in that: Guide grooves are respectively arranged on the inner corners of the key base, and the outer corners of the pressing head match the guide grooves.