Key switch assembly with stable triggering
By designing an independent trigger slider and guide rail structure in the key switch assembly, the problem of signal instability caused by shaking of traditional key switches is solved, and higher signal accuracy and stability are achieved.
Patent Information
- Application Number
- CN202421533928.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-01
AI Technical Summary
When a traditional button switch is pressed, due to the different pressing positions of the user's fingers, the switch shaft may easily shake, resulting in unstable and inaccurate signals generated by electronic components, making it difficult to meet high performance requirements.
A trigger-stable key switch assembly is designed. By assembling an independent trigger slider at the center of the bottom of the switch shaft, and a guide rail is set on the side of the trigger slider. A corresponding guide groove is set on the key base to ensure the stable up and down movement of the trigger slider, independent of the switch shaft, and prevent shaking conduction.
It effectively reduces the impact of the shaking of the switch shaft on the trigger electronic components, improves the accuracy and stability of the output signal, and meets the needs of high-performance key switches.
Smart Images
Figure CN222775179U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of key switches, in particular to a key switch component with stable triggering. Background Art
[0002] Push button switches are widely used as a common switch. The user presses the switch shaft (also known as 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 switch shaft resets upward under the action of the reset spring.
[0003] The traditional key switch is designed to directly trigger the electronic components to generate signals through the switch shaft. However, when the switch shaft is pressed, the user's finger presses in different positions, which can easily cause the switch shaft to shake. This shaking can 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 shaking, the cost is too high and the actual effect of reducing 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 key switch assembly with stable triggering and capable of effectively reducing shaking.
[0006] To achieve the technical purpose, the solution of the utility model is: a trigger-stable key switch assembly, used to trigger an electronic component to generate a switch signal, including a shell composed of a key base and an upper cover, a switch shaft and a reset spring, and also including an independent trigger slider, which is assembled and abutted against the bottom center of the switch shaft, the side of the trigger slider is configured with a guide rail, and the key base is provided with a guide groove corresponding to the guide rail; one end of the reset spring abuts against the key base, and the other end abuts against the trigger slider; pressing the switch shaft drives the trigger slider to overcome the tension of the reset spring and move downward to trigger the electronic component to generate a switch signal.
[0007] Preferably, a guide column extends downward from the bottom of the switch shaft, a guide platform with a guide cavity is constructed at the bottom of the key seat, a through hole is opened in the middle of the trigger slider, the cross-section of the through hole is larger than the cross-section of the guide column, the guide column can freely move through the through hole and be inserted into the guide cavity of the guide platform, and the reset spring is sleeved on the guide column and the guide platform.
[0008] Preferably, a circle of raised abutment ring extends around the through hole of the trigger slider toward the bottom of the switch shaft, and the trigger slider abuts against the bottom of the switch shaft through the abutment ring.
[0009] Preferably, a pair of stabilizing frames disposed opposite to each other on the key base are further constructed, the guide grooves are arranged on the side walls of the stabilizing frames, and two guide rails on the trigger slider are also disposed opposite to each other on the left and right, and the guide rails correspond to the guide grooves on the stabilizing frames one by one.
[0010] Preferably, a pair of anti-detachment hooks extend from both sides of the bottom of the switch shaft, and the trigger slider is provided with a hook groove corresponding to the position of the anti-detachment hook, and the anti-detachment hook can be inserted into the hook groove to prevent the trigger slider from falling.
[0011] Preferably, limiting protrusions are provided on both sides of the switch shaft, and the upper cover is provided with a top stop platform for limiting the upward movement of the limiting protrusions.
[0012] Preferably, the bottom of the guide rail is a wedge-shaped structure that is wide at the top and narrow at the bottom, and the bottom of the guide groove on the stabilizing frame is also configured as a wedge-shaped groove structure that matches the wedge-shaped structure.
[0013] Preferably, the electronic element is a Hall element, and a magnetic cavity is further formed on the trigger slider, in which a magnetic block is installed.
[0014] Preferably, the magnetic cavity is arranged on one side of the trigger slider, and a clearance groove is formed on the key seat corresponding to the position of the magnetic cavity.
[0015] Preferably, the magnetic cavity has a raised convex bottom extending from the bottom of the trigger slider toward the key seat avoidance groove, a magnetic hole is provided at the bottom of the convex bottom, and the Hall element is arranged at the lower part of the magnetic hole.
[0016] The beneficial effects of the present invention are as follows: through a uniquely designed trigger slider, the structural component that triggers the electronic component to generate a signal is separated from the switch shaft that is prone to shaking when pressed; by abutting the trigger slider against the bottom center of the switch shaft, the unstable pressing on the switch shaft can only transmit the downward pressure to the trigger slider, thereby minimizing and preventing the influence of the shaking of the switch shaft on the trigger slider; in addition, a precise guide rail of the trigger slider and a stable guide structure of the corresponding guide groove are constructed, further ensuring the stable up and down movement of the trigger slider; the key switch assembly of the present invention can effectively reduce the triggering influence caused by shaking, so that the output signal has higher accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a partial structural schematic diagram of the utility model;
[0018] Figure 2 It is an exploded view of the utility model;
[0019] Figure 3It is a schematic diagram of the structure of the switch shaft and the trigger slider in the utility model;
[0020] Figure 4 It is a cross-sectional view of the switch shaft and the trigger slider in the utility model;
[0021] Figure 5 It is a structural schematic diagram of the trigger slider in the utility model;
[0022] Figure 6 It is a schematic diagram of the structure of the trigger slider and the magnetic block in the utility model;
[0023] Figure 7 It is a structural schematic diagram of the key base in the utility model;
[0024] Figure 8 It is a cross-sectional view of the trigger slider in the utility model located on the upper part of the key base;
[0025] Fig. 9 It is a cross-sectional view of the trigger slider in the present invention located at the bottom of the key base;
[0026] Fig.10 It is a schematic diagram of the bottom structure of the utility model.
[0027] In the figure: 1. upper cover; 2. switch shaft; 201. guide column; 202. anti-disconnection hook; 203. limit convex block; 3. magnetic block; 4. trigger slider; 401. guide rail; 402. through hole; 403. abutment ring; 404. hook groove; 405. wedge-shaped structure; 406. magnetic cavity; 407. convex bottom; 408. magnetic hole; 5. reset spring; 6. key base; 601. guide groove; 602. guide cavity; 603. guide platform; 604. stabilizing frame; 605. wedge-shaped groove; 606. air avoidance groove; 7. Hall element; 8. PCB board. DETAILED DESCRIPTION
[0028] 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.
[0029] 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.
[0030] like Figure 1-10 As shown, the utility model relates to a trigger-stable key switch assembly for triggering electronic components to generate switch signals, which includes a shell consisting of a key base 6 and an upper cover 1, a switch shaft 2 that can move up and down, and a reset spring 5 for restoring the switch shaft to its original position.
[0031] The core point of the utility model is to design a trigger slider 4 independent of the switch shaft, through which the electronic components are triggered to generate a switch signal, rather than directly triggered by the switch shaft as in the traditional structure. The purpose of this is to effectively prevent and reduce the impact of the shaking of the switch shaft on the triggering of the electronic components.
[0032] The trigger slider 4 is assembled and abutted against the center of the bottom of the switch shaft 2. Such a connection structure prevents the shaking of the switch shaft 2 caused by the user pressing the switch shaft 2 at an uncertain position (such as any edge of the key cap) from being transmitted to the trigger slider, and ensures that the pressing of the switch shaft 2 can only transmit the downward pressure to the trigger slider as much as possible. In addition, in order to further ensure the smooth and stable up and down movement of the trigger slider 4, a guide rail 401 is constructed on the side of the trigger slider 4, and a guide groove 601 is provided on the key base 6 corresponding to the guide rail 401. The guide rail 401 and the guide groove 601 provide precise guidance for the trigger slider 4, ensuring that the slider will not deviate or shake during the up and down movement, and remain stable.
[0033] By separating the trigger slider 4 of the trigger structure from the switch shaft and further stabilizing the movement of the trigger slider itself, the transmission of shaking is effectively blocked while the movement stability of the trigger slider is further enhanced. This allows the key switch assembly of the utility model to effectively reduce the triggering effect caused by shaking and ensure that the output signal has higher accuracy and stability.
[0034] In the utility model, one end of the reset spring 5 abuts against the key seat 6, and the other end abuts against the trigger slider 4, providing upward reset tension for the trigger slider 4 and the switch shaft 2 at the same time, ensuring that the trigger slider 4 and the switch shaft 2 can quickly return to the initial position after release; when the user uses it, pressing the switch shaft 2 drives the trigger slider 4 to overcome the tension of the reset spring 5 and move downward, thereby triggering the electronic component to generate a switch signal.
[0035] In order to ensure the smooth up and down movement of the switch shaft itself, a guide column 201 extends downward from the bottom of the switch shaft 2, and a guide platform 603 with a guide cavity 602 is constructed at the bottom of the key seat 6 to provide a stable guide for the guide column 201. Correspondingly, a through hole 402 is opened at the middle of the trigger slider 4 at a position corresponding to the guide column 201. The cross section of the through hole 402 is larger than the cross section of the guide column 201 so that no force is generated between the guide column and the through hole. The guide column 201 can freely move through the through hole 402 of the trigger slider 4 and insert into the guide cavity 602 at the bottom of the key seat 6. For ease of assembly, the reset spring 5 is sleeved on the guide column 201 and the guide platform 603 to abut against the key seat 6. The purpose of this structural design is to ensure that the trigger slider 4 and the switch shaft 2 are isolated from each other and to prevent the shaking of the switch shaft from transmitting to the trigger slider.
[0036] In order to minimize the impact of the swing of the switch shaft 2 on the trigger slider 4, a raised abutment ring 403 extends around the through hole 402 of the trigger slider 4 toward the bottom of the switch shaft 2. The trigger slider 4 abuts against the bottom of the switch shaft 2 via the abutment ring 403. That is to say, the top of the trigger slider 4 abuts against the bottom of the switch shaft 2 only by the abutment ring 403, so that a connection relationship similar to a point contact is formed between the switch shaft 2 and the trigger slider 4, which can further reduce the transmission of the swing of the switch shaft 2 to the trigger slider 4.
[0037] In a preferred embodiment, Figure 7 , 9 As shown, a stabilizing frame 604 is constructed on the key base 6, and a guide groove 601 is arranged on the side wall of the stabilizing frame 604, and the stabilizing frame 604 is provided in two opposite to each other on the left and right; the guide rails 401 on the trigger slider 4 are also provided in two opposite to each other on the left and right, and the guide rails 401 correspond to the guide grooves 601 on the stabilizing frame 604 one by one, forming a stable sliding system, which further improves the stability of the up and down movement of the trigger slider 4.
[0038] In order to further limit the switch shaft 2 and the trigger slider 4, a pair of anti-disconnection hooks 202 are extended from both sides of the bottom of the switch shaft 2, and the trigger slider 4 is provided with a hook groove 404 corresponding to the position of the anti-disconnection hook 202. The anti-disconnection hook 202 can be inserted into the hook groove 404 to form a stable connection to prevent the trigger slider 4 from falling; limiting protrusions 203 are provided on both sides of the switch shaft 2, and the upper cover 1 is provided with a top stop platform for limiting the upward movement of the limiting protrusion 203. When the switch shaft 2 is reset by the reset spring 5, the limiting protrusion 203 will contact the top stop platform, and the top stop platform prevents the limiting protrusion 203 from continuing to move upward, thereby limiting the upward travel of the switch shaft 2.
[0039] The bottom of the guide rail 401 is a wedge-shaped structure 405 that is wide at the top and narrow at the bottom. The bottom of the guide groove 601 of the stabilizing frame 604 is provided with a wedge-shaped groove 605 structure that matches the wedge-shaped structure 405, which is used to receive and match the wedge-shaped structure 405 part of the guide rail 401 when the trigger slider 4 is pressed to the bottom. This design enables the guide rail 401 to fit tightly with the key base 6 when the trigger slider 4 moves to the bottom. When the key is pressed to the bottom, the switch shaft 2 and the trigger slider 4 are most likely to shake. Therefore, the wedge-shaped structure 405 set at the bottom is conducive to reducing the impact of the switch shaft 2 being pressed to the bottom and shaking, thereby ensuring the stability of the entire trigger structure and outputting a stable signal.
[0040] like Figure 8-9 As shown, Figure 8 To trigger the slider 4 to be at the top, Fig. 9 When the trigger slider 4 is at the bottom, the wedge-shaped structure 405 on the guide rail 401 of the trigger slider 4 matches and combines with the wedge-shaped groove 605 of the guide groove 601 on the stabilizing frame 604 .
[0041] The present application also provides a specific embodiment of a Hall switch, in which the electronic component is a Hall element 7 arranged on a PCB board 8, and a magnetic cavity 406 is also constructed on the trigger slider 4, and the magnetic cavity 406 is used to install a magnetic block 3. When the magnetic block 3 (located in the magnetic cavity 406) approaches or moves away from the Hall element 7, the Hall element 7 can detect changes in the magnetic field and output corresponding electrical signals.
[0042] In order to optimize the structure of the magnetic cavity 406 so that the Hall element 7 can detect the change of the magnetic field more accurately, the magnetic cavity 406 is arranged on one side of the trigger slider 4, and a clearance groove 606 is provided at the bottom of the key seat 6 corresponding to the position of the magnetic cavity 406. Furthermore, the magnetic cavity 406 extends a raised convex bottom 407 from the bottom of the trigger slider 4 toward the key seat clearance groove 606, which means that when the trigger slider 4 moves to the bottom position, the convex bottom 407 of the magnetic cavity can reach the lower position of the key seat 6, and the design of the clearance groove 606 allows the magnetic cavity 406 to be closer to the Hall element 7, and a magnetic hole 408 is provided at the bottom of the convex bottom 407 of the magnetic cavity, and the Hall element 7 is arranged at the lower part of the magnetic hole 408, so that when the trigger slider 4 moves to the bottom position, the Hall element 7 can more accurately sense the change of the magnetic field generated by the magnetic block 3, thereby improving the accuracy and reliability of the switch action.
[0043] 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 trigger-stable key switch assembly, used to trigger an electronic component to generate a switch signal, comprising a housing consisting of a key base and an upper cover, a switch shaft and a return spring, characterized in that: It also includes an independent trigger slider, which is assembled and abutted against the bottom center of the switch shaft. The side of the trigger slider is constructed with a guide rail, and the key seat is provided with a guide groove corresponding to the guide rail; one end of the reset spring abuts against the key seat, and the other end abuts against the trigger slider; pressing the switch shaft drives the trigger slider to overcome the tension of the reset spring and move downward, thereby triggering the electronic component to generate a switch signal.
2. The key switch assembly according to claim 1, characterized in that: A guide column extends downward from the bottom of the switch shaft, a guide platform with a guide cavity is constructed at the bottom of the key seat, a through hole is opened in the middle of the trigger slider, the cross section of the through hole is larger than the cross section of the guide column, the guide column can freely move through the through hole and be inserted into the guide cavity of the guide platform, and the reset spring is sleeved on the guide column and the guide platform.
3. The key switch assembly according to claim 2, characterized in that: A circle of raised abutment ring extends around the through hole of the trigger slider toward the bottom of the switch shaft, and the trigger slider abuts against the bottom of the switch shaft through the abutment ring.
4. The key switch assembly according to claim 3, characterized in that: The key base is also provided with a pair of stabilizing frames arranged opposite to each other on the left and right. The guide grooves are arranged on the side walls of the stabilizing frames. The guide rails on the trigger slider are also arranged opposite to each other on the left and right. The guide rails correspond to the guide grooves on the stabilizing frames one by one.
5. The key switch assembly according to claim 4, characterized in that: A pair of anti-drop hooks are also extended from both sides of the bottom of the switch shaft, and the trigger slider is provided with hook grooves corresponding to the positions of the anti-drop hooks. The anti-drop hooks can be inserted into the hook grooves to prevent the trigger slider from falling.
6. The key switch assembly according to claim 4, characterized in that: Limiting protrusions are arranged on both sides of the switch shaft, and the upper cover is provided with a top stop platform for limiting the upward movement of the limiting protrusions.
7. The key switch assembly according to claim 4, characterized in that: The bottom of the guide rail is a wedge-shaped structure that is wide at the top and narrow at the bottom, and the bottom of the guide groove on the stabilizing frame is also configured as a wedge-shaped groove structure that matches the wedge-shaped structure.
8. The key switch assembly according to any one of claims 1 to 7, characterized in that: The electronic element is a Hall element, and a magnetic cavity is also formed on the trigger slider, in which a magnetic block is installed.
9. The key switch assembly according to claim 8, characterized in that: The magnetic cavity is arranged on one side of the trigger slider, and a clearance groove is formed on the key seat corresponding to the position of the magnetic cavity.
10. The key switch assembly according to claim 9, characterized in that: The magnetic cavity has a protruding convex bottom extending from the bottom of the trigger slider toward the key seat avoidance groove, a magnetic hole is provided at the bottom of the convex bottom, and the Hall element is arranged at the lower part of the magnetic hole.