Stably-triggered button switch assembly

Abstract

Disclosed in the present invention is a stably-triggered button switch assembly, comprising an independent triggering sliding block, wherein the triggering sliding block is fitted on and abuts against the center of the bottom of a switch shaft; guide rails are arranged on the sides of the triggering sliding block; guide grooves are formed at the positions of a button base corresponding to the guide rails; a return spring has one end abutting against the button base, and the other end abutting against the triggering sliding block; and the switch shaft is pressed to drive the triggering sliding block to overcome the tension of the return spring to move downward, thereby triggering an electronic element to generate a switch signal. By means of the unique design of a triggering sliding block, a structural member for triggering an electronic element to generate a signal is separated from a switch shaft that is prone to shake during pressing, and the triggering sliding block abuts against the center of the bottom of the switch shaft, such that only downward pressure can be intensively conducted to the triggering sliding block when an unstable pressing force is applied to the switch shaft, thereby reducing and preventing the impact of the shaking of the switch shaft on the triggering sliding block to the greatest extent, and achieving high accuracy and stability of an output signal.

Description

Trigger stable key switch assembly TECHNICAL FIELD

[0001] The present application relates to the field of key switch, in particular to a trigger stable key switch assembly. BACKGROUND

[0002] Key switch as a commonly used switch is widely used, the user presses the switch shaft (also known as the pressing head) down, triggers the electronic element (may be a metal spring, pressure sensor, light pair tube, hall element, etc.) to generate a corresponding switch signal, and the switch shaft is reset under the action of the reset spring when the hand is released.

[0003] The traditional key is directly triggered by the switch shaft to generate a signal in the structural design, but because the switch shaft is pressed, the pressing position of the user's finger is different, which easily leads to the shaking of the switch shaft. This shaking will lead to unstable and inaccurate signal generation of the electronic element. For high-performance key switch, it is a difficult technical obstacle to overcome. If only the processing precision of the mechanical structure of the key is blindly improved to reduce the shaking, the cost is too high and the effect of reducing the shaking is very limited.

[0004] The motivation of the present application is to reduce the shaking problem of the key switch as much as possible at a low cost by reconfiguring the structure of the key. SUMMARY

[0005] In view of the above problems, the present application aims to provide a trigger stable key switch assembly which can effectively reduce the shaking.

[0006] To achieve the technical purpose, the present application is as follows: a trigger stable key switch assembly for triggering an electronic element to generate a switch signal, comprising a shell composed of a key seat and an upper cover, a switch shaft and a reset spring, further comprising a separate trigger slider which is assembled to abut the bottom center of the switch shaft, the side of the trigger slider is provided 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 on the key seat, and the other end abuts on the trigger slider; the switch shaft is pressed to drive the trigger slider to overcome the tension of the reset spring to go down and trigger the electronic element to generate a switch signal.

[0007] As a preferred, the bottom of the switch shaft extends downwardly with a guide column, the bottom of the key seat is provided with a guide table with a guide cavity, the middle part of the trigger slider is provided with a through hole, the cross section of the through hole is larger than that of the guide column, the guide column can freely pass through the through hole and insert into the guide cavity of the guide table, and the reset spring is sleeved on the guide column and the guide table.

[0008] Preferably, the trigger slider is provided with a protruding abutting ring around the through hole, which abuts against the bottom of the switch shaft.

[0009] Preferably, the key seat is further provided with a pair of left and right opposite stabilizing frames, the guide grooves are arranged on the side walls of the stabilizing frames, and the guide rails on the trigger slider are also arranged in pairs and opposite to each other, and the guide rails correspond to the guide grooves on the stabilizing frames.

[0010] Preferably, the bottom of the switch shaft is further provided with a pair of anti-falling hooks, the trigger slider is provided with a hook groove corresponding to the positions of the anti-falling hooks, and the anti-falling hooks can be inserted into the hook groove to prevent the trigger slider from falling.

[0011] Preferably, the switch shaft is provided with limiting protrusions on both sides, 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 in a wedge-shaped structure with a wide top and a narrow bottom, and the bottom of the guide groove on the stabilizing frame is also in a wedge-shaped groove structure matching the wedge-shaped structure.

[0013] Preferably, the electronic element is a Hall element, and the trigger slider is further provided with a magnet cavity, and a magnetic block is arranged in the magnet cavity.

[0014] Preferably, the magnet cavity is arranged on one side of the trigger slider, and the key seat is provided with a clearance groove corresponding to the magnet cavity.

[0015] Preferably, the magnet cavity extends a protruding bottom towards the clearance groove of the key seat at the bottom of the trigger slider, the bottom of the protruding bottom is provided with a magnetic through hole, and the Hall element is arranged below the magnetic through hole.

[0016] The key switch assembly of the present application can effectively reduce the triggering effect caused by shaking, so that the output signal has higher accuracy and stability. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a partial structure schematic view of the present application;

[0018] Fig. 2 is an exploded view of the present application;

[0019] Fig. 3 is a structural diagram of the switch shaft and the trigger slider in the present application;

[0020] Fig. 4 is a sectional view of the switch shaft and the trigger slider in the present application;

[0021] Fig. 5 is a structural diagram of the trigger slider in the present application;

[0022] Fig. 6 is a structural diagram of the trigger slider and the magnetic block in the present application;

[0023] Fig. 7 is a structural diagram of the key seat in the present application;

[0024] Fig. 8 is a sectional view of the trigger slider located at the upper part of the key seat in the present application;

[0025] Fig. 9 is a sectional view of the trigger slider located at the bottom of the key seat in the present application;

[0026] Fig. 10 is a structural diagram of the bottom part in the present application.

[0027] In the figure: 1, upper cover; 2, switch shaft; 201, guide column; 202, anti-escape hook; 203, limiting protrusion; 3, magnetic block; 4, trigger slider; 401, guide rail; 402, through hole; 403, abutment ring; 404, hook groove; 405, wedge structure; 406, magnetic cavity; 407, convex bottom; 408, magnetic through hole; 5, reset spring; 6, key seat; 601, guide groove; 602, guide cavity; 603, guide table; 604, stabilizing frame; 605, wedge-shaped groove; 606, empty slot; 7, Hall element; 8, PCB board. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below in conjunction with the drawings and specific embodiments. In order to clearly and completely describe the technical solutions, the following embodiments are selected for description; the following embodiments are part of the embodiments of the present application; other embodiments obtained based on the present application without making creative efforts are all within the protection scope of the present application.

[0029] In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and the like orientation or position relationship are all based on the orientation or position relationship shown in the drawings, and are only for the convenience of clearly describing the embodiments, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, so it cannot be understood as a limitation on the present application. At the same time, "first", "second" in the embodiments are only used for distinguishing description purposes, and do not represent relative importance.

[0030] As shown in Fig. 1-10, the key switch assembly of the present application is used for triggering electronic components to generate switch signals, which comprises a shell composed of a key base 6 and an upper cover 1, a switch shaft 2 capable of moving up and down, and a reset spring 5 for restoring the switch shaft to its original position.

[0031] The core point of the present application is to design a trigger slider 4 independent of the switch shaft, which is used to trigger electronic components to generate switch signals, instead of directly triggering the electronic components through the switch shaft as in the conventional structure. The purpose of this is to effectively block and reduce the influence of the shaking of the switch shaft on the triggering of the electronic components.

[0032] The trigger slider 4 is assembled to abut the center of the bottom of the switch shaft 2. Such a connection structure makes the shaking of the switch shaft 2 when pressed by the user at an uncertain position (such as any edge of the keycap) not be transmitted to the trigger slider, thereby maximizing the assurance that the pressing of the switch shaft 2 can only transmit the downward pressure to the trigger slider. 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 arranged on the side of the trigger slider 4, and a guide groove 601 is arranged on the key base 6 corresponding to the guide rail 401. The guide rail 401 and the guide groove 601 provide accurate guidance for the trigger slider 4, ensuring that the slider will not deviate or shake during the up-and-down movement, and maintaining stability.

[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, and the movement stability of the trigger slider is further enhanced, so that the key switch assembly of the present application can effectively reduce the triggering effect caused by shaking, and ensure that the output signal has higher accuracy and stability.

[0034] In the present application, one end of the reset spring 5 abuts against the key base 6, and the other end abuts against the trigger slider 4, thereby providing upward restoring tension for the trigger slider 4 and the switch shaft 2, and ensuring that the trigger slider 4 and the switch shaft 2 can quickly return to the initial position after being released; when used by the user, the switch shaft 2 is pressed to drive the trigger slider 4 to overcome the tension of the reset spring 5 and move downward to trigger the electronic components to generate switch signals.

[0035] In order to guarantee the stability of the up and down movement of the switch shaft, the bottom of the switch shaft 2 extends downwardly with a guide column 201, the bottom of the key seat 6 is provided with a guide table 603 with a guide cavity 602, which provides stable guidance for the guide column 201. Correspondingly, a through hole 402 is formed in the middle of the trigger slider 4 corresponding to the position of the guide column 201, the cross section of the through hole 402 is larger than that 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 pass through the through hole 402 of the trigger slider 4 and is inserted into the guide cavity 602 of the bottom of the key seat 6. In order to facilitate assembly, the return spring 5 is sleeved on the guide column 201 and the guide table 603 and abuts against the key seat 6. The purpose of this structure design is to guarantee the mutual isolation of the trigger slider 4 and the switch shaft 2 and to eliminate the influence of the swing of the switch shaft on the trigger slider.

[0036] In order to best reduce the influence of the swing of the switch shaft 2 on the trigger slider 4, a circle of protruding abutting rings 403 is extended from the periphery of the through hole 402 of the trigger slider 4 towards the bottom of the switch shaft 2, the trigger slider 4 abuts against the bottom of the switch shaft 2 through the abutting rings 403, that is, the top of the trigger slider 4 only abuts against the bottom of the switch shaft 2 through the abutting rings 403, so that a connection relationship similar to point contact is formed between the switch shaft 2 and the trigger slider 4, which can further reduce the swing of the switch shaft 2 and the transmission to the trigger slider 4.

[0037] In the preferred specific embodiment, as shown in FIGS. 7 and 9, the key seat 6 is provided with a stabilizing frame 604, the guide groove 601 is arranged on the side wall of the stabilizing frame 604, and the stabilizing frame 604 is arranged oppositely on the left and right sides; the guide rails 401 on the trigger slider 4 are also arranged oppositely on the left and right sides, 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, the bottom of the switch shaft 2 further extends a pair of anti-falling hooks 202 on both sides, the trigger slider 4 is provided with hook grooves 404 corresponding to the positions of the anti-falling hooks 202, the anti-falling hooks 202 can be inserted into the hook grooves 404 to form a stable connection for preventing the trigger slider 4 from falling; the switch shaft 2 is provided with limiting protrusions 203 on both sides, the upper cover 1 is provided with a top stop platform for limiting the upward movement of the limiting protrusions 203, when the switch shaft 2 is reset by the return spring 5, the limiting protrusions 203 will contact the top stop platform, the top stop platform prevents the limiting protrusions 203 from continuing to move upward, thereby limiting the upward stroke of the switch shaft 2.

[0039] The bottom of the guide rail 401 is a wedge-shaped structure 405 which is wide at the top and narrow at the bottom. The guide groove 601 of the stabilizer 604 is provided with a wedge-shaped groove 605 structure which matches the wedge-shaped structure 405, and is used to receive and match the wedge-shaped structure 405 of the guide rail 401 when the trigger slider 4 is pressed to the bottom. This design enables the guide rail 401 to closely match the key seat 6 when the trigger slider 4 is moved 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, so the wedge-shaped structure 405 provided at the bottom helps to reduce the influence of the switch shaft 2 shaking when pressed to the bottom, and ensures the stability of the entire trigger structure, thereby stably outputting a signal.

[0040] As shown in FIGS. 8-9, FIG. 8 shows the trigger slider 4 in a top position, and FIG. 9 shows the trigger slider 4 in a bottom position. 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 of the stabilizer 604.

[0041] The application also provides a specific embodiment of a Hall switch. The electronic element is a Hall element 7 provided on the PCB 8. The trigger slider 4 is further provided with a magnet cavity 406. The magnet cavity 406 is used to install the magnetic block 3. When the magnetic block 3 (located in the magnet cavity 406) approaches or moves away from the Hall element 7, the Hall element 7 can detect the change in the magnetic field and output a corresponding electrical signal.

[0042] In order to optimize the structure of the magnet cavity 406 to enable the Hall element 7 to more accurately detect the change in the magnetic field, the magnet cavity 406 is provided on one side of the trigger slider 4. The key seat 6 is provided with an empty slot 606 at a position corresponding to the magnet cavity 406. Further, the magnet cavity 406 extends out a convex bottom 407 towards the key seat empty slot 606 at the bottom of the trigger slider 4. This means that when the trigger slider 4 is moved to the bottom position, the convex bottom 407 of the magnet cavity can reach the low position of the key seat 6. The design of the empty slot 606 allows the magnet cavity 406 to be closer to the Hall element 7. The bottom of the convex bottom 407 of the magnet cavity is provided with a magnetic through hole 408. The Hall element 7 is provided at the lower part of the magnetic through hole 408. When the trigger slider 4 is moved to the bottom position, the Hall element 7 can more accurately perceive the change in the magnetic field generated by the magnetic block 3, thereby improving the accuracy and reliability of the switch operation.

[0043] The above description is only a preferred embodiment of the application and is not intended to limit the application. Any slight modification, equivalent replacement and improvement made according to the technical essence of the application to the above embodiment shall be included in the protection scope of the technical solution of the application.

Claims

1. A trigger-stable key switch assembly for triggering an electronic element to generate a switch signal, comprising a housing composed of a key base and an upper cover, a switch shaft and a reset spring, characterized in that, The trigger slider is assembled against the bottom center of the switch shaft, the side of the trigger slider is provided with a guide rail, the key seat is provided with a guide groove corresponding to the guide rail, one end of the reset spring is abutted against the key seat and the other end is abutted against the trigger slider, the trigger slider is driven to move downward to trigger the electronic element to generate a switch signal by overcoming the tension of the reset spring.

2. The key switch assembly of claim 1, wherein The bottom of the switch shaft extends downwardly a guide column, the bottom of the key seat is provided with a guide table with a guide cavity, the middle of the trigger slider is provided with a through hole with a cross section larger than that of the guide column, the guide column is freely inserted into the guide cavity of the guide table through the through hole, and the reset spring is sleeved on the guide column and the guide table.

3. The key switch assembly of claim 2, wherein The trigger slider is provided with a protruding abutting ring around the through hole and extending toward the bottom of the switch shaft, and the trigger slider is abutted against the bottom of the switch shaft through the abutting ring.

4. The key switch assembly of claim 3, wherein The key seat is further provided with a pair of left and right stable frames, the guide groove is arranged on the side wall of the stable frame, and the guide rail on the trigger slider is also a pair of left and right stable frames, and the guide rail and the guide groove on the stable frame are one-to-one corresponding.

5. The key switch assembly of claim 4, wherein, The bottom of the switch shaft is further provided with a pair of anti-falling hooks, the trigger slider is provided with a hook groove corresponding to the position of the anti-falling hooks, and the anti-falling hooks can be inserted into the hook groove to prevent the trigger slider from falling.

6. The key switch assembly of claim 4, wherein, The switch shaft is provided with a limiting protrusion on both sides, and the upper cover is provided with a top stop platform for limiting the upward movement of the limiting protrusion.

7. The key switch assembly of claim 4, wherein The bottom of the guide rail is a wedge-shaped structure with a wide top and a narrow bottom, and the guide groove on the stable frame is also a wedge-shaped groove structure matching the wedge-shaped structure.

8. The key switch assembly according to any one of claims 1 to 7, wherein The electronic element is a Hall element, and the trigger slider is further provided with a magnet cavity, and a magnetic block is installed in the magnet cavity.

9. The key switch assembly of claim 8, wherein, The magnet cavity is arranged on one side of the trigger slider, and the key seat is provided with an avoidance slot corresponding to the magnet cavity.

10. The key switch assembly of claim 9, wherein, The magnet cavity extends a protruding bottom toward the avoidance slot of the key seat at the bottom of the trigger slider, the bottom of the protruding bottom is provided with a magnetic through hole, and the Hall element is arranged below the magnetic through hole.

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