Hall switch with stable triggering and keyboard

Abstract

The utility model discloses a Hall switch capable of being triggered stably, which comprises an independent T-shaped triggering shaft, the triggering shaft is composed of a shaft top and a shaft body, and the triggering shaft is contacted with the central position of the bottom of a pressing handle through the top point of the triggering shaft; a guide cavity is formed in the key seat, and the shaft body can be assembled in the guide cavity in an up-and-down moving manner; the reset spring is sleeved outside the shaft body, one end of the reset spring abuts against the key seat, and the other end of the reset spring abuts against the bottom of the shaft top. The trigger shaft is magnetic, and the pressing handle is pressed downwards to drive the trigger shaft to overcome the tension of the reset spring to move downwards so as to trigger the Hall element to generate electromagnetic signals. The triggering shaft which is uniquely designed is independent of the pressing handle which is easy to shake during pressing and is in point contact with the center of the bottom of the pressing handle in an abutting mode, and the influence of shaking of the pressing handle on the triggering shaft is reduced to the maximum extent. Therefore, the stable up-and-down movement of the trigger shaft is ensured, the influence caused by the shaking of the key is reduced, and the output signal has higher accuracy and stability.

Description

Technical Field

[0001] The utility model relates to the field of switches, and particularly to a Hall switch with stable triggering. Background Art

[0002] As a non-contact magnetic control switch based on the Hall effect, the Hall switch has gradually become a research hotspot in the field of keyboard switches due to its advantages of no contact, long service life, low noise, high sensitivity, etc. The Hall switch triggers a signal by detecting the change of the magnetic field without physical contact, thus greatly reducing wear and noise. However, there are still some problems in the triggering stability of the existing Hall switches, such as inconsistent triggering force, triggering point drift, signal interference, etc., which affect the overall performance and user experience of the keyboard.

[0003] In particular, in the design of the existing Hall switches, the triggering mechanism often has a complex structure, difficult assembly, and it is difficult to ensure the same triggering force every time it is triggered, resulting in unstable triggering signals. In addition, due to the relative position between the magnetic part and the triggering mechanism being difficult to accurately control, the phenomenon of triggering point drift is likely to occur, affecting the accuracy of the signal. Summary of the Utility Model

[0004] Aiming at the above problems, the utility model aims to provide a Hall switch and a keyboard with stable triggering.

[0005] To achieve the technical purpose, the solution of the utility model is: a Hall switch with stable triggering, used to trigger a Hall element to generate a signal, including a key seat, a return spring, and a push handle that can move up and down in the key seat, and also includes an independent "T"-shaped trigger shaft, the trigger shaft is composed of a shaft top and a shaft body, and the trigger shaft contacts the bottom center position of the push handle with the shaft top; a guide cavity is provided in the key seat, and the shaft body of the trigger shaft is assembled in the guide cavity so as to be able to move up and down; the return spring is sleeved outside the shaft body, one end of the return spring abuts against the key seat, and the other end abuts against the bottom of the shaft top; the trigger shaft has magnetism, and pressing down the push handle drives the trigger shaft to overcome the tension of the return spring and move downward to trigger the Hall element to generate an electromagnetic signal.

[0006] Preferably, the inner wall of the key seat and the outer wall of the push handle are provided with mutually matching guiding structures, and the push handle moves up and down stably along the inner wall of the key seat through the guiding structures.

[0007] Preferably, a convex structure is configured in the middle of the surface of the shaft top.

[0008] Preferably, a concave structure is configured at the bottom of the push handle to match the convex structure in the middle of the surface of the shaft top.

[0009] Preferably, the shaft body of the trigger shaft is a hollow structure, and a magnetic part is arranged inside the hollow structure so that the trigger shaft has magnetism.

[0010] Preferably, the trigger shaft is made of a magnetic material.

[0011] Preferably, a pair of anti - detachment hooks are provided on the outer wall of the push handle, and hook grooves are provided at positions corresponding to the anti - detachment hooks in the key seat. When the push handle resets, the anti - detachment hooks are stopped by the hook grooves and cannot move upward continuously.

[0012] Preferably, limiting grooves are respectively provided at the inner corners of the key seat, and the outer corners of the push handle are matched with the limiting grooves.

[0013] Preferably, it further includes an upper cover which is sleeved on the key seat to limit the upward movement of the push handle.

[0014] The present utility model also provides a solution: a keyboard having a plurality of Hall switches as described in any one of the above, the Hall switches are assembled on a bottom plate, and Hall elements are patch - mounted at positions of the bottom plate corresponding to each switch one by one.

[0015] The beneficial effects of the present utility model are as follows: Through the uniquely designed trigger shaft, it is separated from the push handle which is prone to shaking during pressing, and is in point - contact abutment with the central part of the bottom of the push handle, minimizing the influence of the shaking of the push handle on the trigger shaft; and through a stable cooperation structure, the stable up - and - down movement of the trigger shaft is ensured, reducing the influence brought by the key shaking, making the output signal have higher accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of the first specific embodiment of the present utility model;

[0017] Figure 2 is a sectional view of the first specific embodiment of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the push handle in the first specific embodiment of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the key seat in the first specific embodiment of the present utility model;

[0020] Figure 5 is an exploded view of the second specific embodiment of the present utility model;

[0021] Figure 6 is a structural schematic diagram of the bottom of the push handle in the second specific embodiment of the present utility model;

[0022] Figure 7 is a structural schematic diagram of the key seat in the second specific embodiment of the present utility model;

[0023] Figure 8This is a schematic structural diagram of the trigger shaft in the present utility model.

[0024] In the figure: 1. Upper cover; 2. Push handle; 201. Guide groove; 202. Concave structure; 203. Anti-disengagement hook; 3. Trigger shaft; 301. Shaft top; 302. Shaft body; 303. Protrusion structure; 4. Return spring; 5. Magnetic part; 6. Key seat; 601. Guide cavity; 602. Stabilizing frame; 603. Guide rail; 604. Limiting groove; 605. Hook groove; 7. Hall element; 8. Bottom plate. Specific embodiments

[0025] The following further describes the present utility model in detail with reference to the drawings and specific embodiments. In order to clearly and completely describe the technical solution, the following embodiments are selected for description; the following embodiments are part of the embodiments of the present utility model; other embodiments obtained on the basis of this application without creative labor belong to the protection scope of the present utility model.

[0026] In the following embodiments, it should be noted that the orientation or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc. are all based on the orientation or positional relationships shown in the drawings, and are only for the convenience of clearly describing this embodiment, rather than indicating or implying that the device or element referred to must have a specific orientation, so it cannot be understood as a limitation to this application. At the same time, "first" and "second" in the embodiments are only used for the purpose of distinguishing descriptions, and do not represent indicating or implying relative importance.

[0027] As Figure 1-4 shown, the first specific embodiment of the present utility model is a Hall switch without an upper cover, which is used to trigger the Hall element 7 to generate a signal, and includes a key seat 6, a return spring 4, and a push handle 2 that can move up and down in the key seat 6. It also includes an independent "T"-shaped trigger shaft 3, that is, the cross-section of the trigger shaft 3 is "T"-shaped. The trigger shaft 3 is composed of a shaft top 301 and a shaft body 302. The trigger shaft 3 contacts the bottom center position of the push handle 2 at the shaft top 301 point; a guide cavity 601 is provided in the key seat 6, and the shaft body 302 can be assembled to move up and down in the guide cavity 601; the return spring 4 is sleeved outside the shaft body 302. One end of the return spring 4 abuts against the key seat 6, and the other end abuts against the bottom of the shaft top 301, so that the trigger shaft 3 can automatically reset to the initial position when not affected by external forces.

[0028] In order to reset and limit the push handle 2, a pair of anti - detachment hooks 203 are provided on the outer wall of the push handle 2. At the position corresponding to the anti - detachment hook 203 in the key seat 6, a hook groove 605 is provided. When the push handle 2 is reset, the anti - detachment hook 203 is stopped by the hook groove 605 and cannot continue to move upward, ensuring that the push handle 2 can return to the initial position when reset. This design prevents the push handle 2 from shaking or shifting during the reset process, ensuring the stability of the trigger signal. Further, in order to enable the push handle 2 to move up and down stably and smoothly, the guiding structure in this specific embodiment is as follows: limiting grooves 604 are respectively provided at the inner corners of the key seat 6, and the outer corners of the push handle 2 match the limiting grooves 604, providing precise guidance for the button.

[0029] As Figure 5-7 shown, the second specific embodiment of the present utility model is a Hall switch with an upper cover, which is used to trigger the Hall element 7 to generate a signal, including an upper cover 1, a key seat 6, a return spring 4, and a push handle 2 that can move up and down in the key seat 6. The upper cover 1 is sleeved on the key seat 6 to limit the upward movement of the push handle 2.

[0030] It further includes an independent trigger shaft 3. The cross - section of the trigger shaft 3 is "T" - shaped. The trigger shaft 3 is composed of a shaft top 301 and a shaft body 302. The trigger shaft 3 contacts the center position of the bottom of the push handle 2 at the shaft top 301 point - contact.

[0031] A guiding cavity 601 is provided in the key seat 6, and the shaft body 302 is assembled in the guiding cavity 601 so as to be able to move up and down; the return spring 4 is sleeved outside the shaft body 302. One end of the return spring 4 abuts against the key seat 6, and the other end abuts against the bottom of the shaft top 301; a guiding structure that cooperates with each other is provided between the inner wall of the key seat 6 and the outer wall of the push handle 2, and the push handle 2 moves up and down along the inner wall of the key seat 6 through the guiding structure. The guiding structure in this specific embodiment includes guide grooves 201 and guide rails 603. A stabilizing frame 602 is configured on the key seat 6. The guide rails 603 are arranged on the stabilizing frame 602, and the stabilizing frame 602 is provided with two opposite left and right; the guide grooves 201 are arranged on the left and right sides of the push handle 2, and the guide grooves 201 correspond to the guide rails 603 on the stabilizing frame 602 one by one, forming a stable sliding system, so that the position of the trigger shaft 3 can be kept unchanged even under the action of external force or shaking.

[0032] As Figure 8As shown, in the middle of the surface of the shaft top 301 of the present application, there is a convex structure 303 protruding upward. The convex structure 303 is preferably hemispherical and can form a point contact with the bottom of the push handle 2, reducing the influence of the key shaking on the trigger shaft 3. Further, a concave structure 202 matching the convex structure in the middle of the surface of the shaft top 301 can also be configured at the bottom of the push handle 2, so that the push handle 2 can be more precisely aligned and contacted with the trigger shaft 3 when pressed. This design reduces the gap generated due to uneven or offset contact surfaces, forms a point contact, thereby reducing the influence of the shaking of the push handle 2 on the trigger shaft 3 and improving the stability of signal triggering. Of course, the bottom of the push handle 2 of the present application can also be a plane, as long as it can achieve a point contact with the trigger shaft 3.

[0033] The trigger signal principle of the present application is as follows: By setting a magnetic part 5 on the trigger shaft 3, pressing the push handle 2 drives the trigger shaft 3 to move downward against the tension of the return spring 4, thereby triggering the Hall element 7 to generate an electromagnetic signal. When the magnetic part 5 on the trigger shaft 3 approaches or moves away from the Hall element 7, it will change the magnetic field around the Hall element 7, thereby triggering a signal.

[0034] Among them, the shaft body 302 of the trigger shaft 3 is a hollow structure, and a magnetic part is built in the hollow structure so that the trigger shaft has magnetism. Alternatively, the push handle 2 itself is a magnetic part 5, and the trigger shaft 3 is made of magnetic material.

[0035] It should be noted that the push handle 2 and the trigger shaft 3 in the present application are independent of each other. The trigger shaft 3 does not guide the push handle 2. The push handle 2 is only guided through the guiding structure to achieve stable up and down movement, and the guiding cavity 601 only guides the trigger shaft 3 to move up and down stably and precisely.

[0036] The present utility model also provides a solution: a keyboard having a plurality of Hall switches in the above specific embodiments. The Hall switches are assembled on the bottom plate 8, and a Hall element 7 is patch-mounted at each position of the bottom plate 8 corresponding to each switch. The Hall element 7 can be patch-mounted above or below the bottom plate 8 for adjustment to facilitate the arrangement of electronic components on the bottom plate 8.

[0037] The above is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. Any minor modifications, equivalent replacements, and improvements made to the above embodiments based on the technical essence of the present utility model should be included in the protection scope of the technical solution of the present utility model.

Claims

1. A Hall switch with stable triggering, used for triggering a Hall element to generate a signal, comprising a key base, a return spring, and a handle that can move up and down in the key base, characterized in that: It also includes an independent "T"-shaped trigger shaft, which is composed of a shaft top and a shaft body, and the trigger shaft contacts the bottom center position of the handle with the shaft top; a guide cavity is provided in 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; the trigger shaft is magnetic, and pressing the handle down drives the trigger shaft to overcome the tension of the reset spring and move downward, thereby triggering the Hall element to generate an electromagnetic signal.

2. The trigger-stable Hall switch according to claim 1, characterized in that: The inner wall of the key base and the outer wall of the push handle are provided with mutually matching guide structures, and the push handle moves up and down stably along the inner wall of the key base through the guide structure.

3. The trigger-stable Hall switch according to claim 2, characterized in that: A convex structure is formed in the middle of the shaft top surface.

4. The trigger-stable Hall switch according to claim 3, characterized in that: The bottom of the handle is provided with a concave structure matching the convex structure in the middle of the top surface of the shaft.

5. The trigger-stable Hall switch according to claim 4, characterized in that: The shaft body of the trigger shaft is a hollow structure, and a magnetic part is built into the hollow structure to make the trigger shaft magnetic.

6. The trigger-stable Hall switch according to claim 4, characterized in that: The trigger shaft is made of magnetic material.

7. The trigger-stable Hall switch according to claim 4, characterized in that: A pair of anti-detachment hooks are arranged on the outer wall of the push handle, and hook grooves are arranged in the key base at positions corresponding to the anti-detachment hooks. When the push handle is reset, the anti-detachment hooks are stopped by the hook grooves and cannot continue to move upward.

8. The trigger-stable Hall switch according to claim 7, characterized in that: Limiting grooves are respectively arranged on the inner corners of the key base, and the outer corners of the button handle match the limiting grooves.

9. The trigger-stable Hall switch according to claim 4, characterized in that: It also includes an upper cover, which is sleeved on the key base to limit the upward movement of the button handle.

10. A keyboard, characterized in that: The invention has a plurality of Hall switches as described in any one of claims 1 to 9, wherein the Hall switches are mounted on a base plate, and a Hall element is patched one by one at a base plate position corresponding to each switch.

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