Silent magnetic shaft

Abstract

The utility model discloses a mute magnetic shaft, including base and the press shaft that can be relative to the up and down activity of base, and the press shaft bottom is equipped with elastic reset piece, and the press shaft is equipped with magnetic piece, and the press shaft is equipped with a mute pad in, bottom is equipped with the guide cavity in this guide cavity, and the opening edge of this guide cavity to the press shaft direction is configured as the concave-convex structure, when the press shaft is pressed to the bottom, and the mute pad and the edge of concave-convex structure abut. Through the mute pad of unique design, effectively eliminated the bottom and rebound noise, and the mute pad is installed firm, has guaranteed the hand feeling and signal stability, in addition, the concave-convex guide cavity edge of innovative design has realized stable contact and smooth exhaust, and each component of this magnetic shaft constitutes an organic whole, and the whole structure is ingenious, and the performance is improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of switch shafts, specifically to a silent magnetic shaft. Background Technology

[0002] A magnetic switch is an electronic switch that uses the Hall effect to sense key travel. Compared to traditional mechanical switches, it has advantages such as adjustable travel and fast response. However, in high-speed typing or gaming scenarios, the noise generated when the switch bottoms out and collides with the housing to reset can still affect the user experience.

[0003] In existing technologies, adding a silencing pad to the magnetic shaft is a common noise reduction method. The usual practice is to install the silencing pad below the pressing shaft and set a top-stop structure on the base to abut it. However, this solution has significant drawbacks: because the top-stop structure is usually located at the edge of the guide cavity, far from the guide post that serves as the center of motion guidance, the stress point of the silencing pad deviates from the support center. This deviation creates an unfavorable leverage effect, making it prone to torsional deformation or even cracking. This not only causes inconsistent pressing feel and loose, rattling noises, but more importantly, the unstable pressing shaft alters the relative position of the internal magnetic components and the external sensor, ultimately leading to electromagnetic signal fluctuations, unstable trigger stroke, and severely affecting the accuracy of the magnetic shaft.

[0004] However, if the silencing pad is placed directly against the guide cavity, the flat edge of the guide cavity and the silencing pad will form a sealed cavity. When the magnetic shaft is pressed, the air inside the cavity cannot be expelled, which can easily cause sticking and affect the smoothness of operation.

[0005] Therefore, there is an urgent need for a new technical solution to solve the problems of stable installation and sticking when pressing the soundproofing pad. Utility Model Content

[0006] To address the aforementioned problems, this invention aims to provide a magnetic shaft that can effectively silence noise and maintain stability.

[0007] To achieve this technical objective, the present invention provides a silent magnetic shaft, comprising a base and a pressing shaft that can move up and down relative to the base. The pressing shaft has an elastic reset component at its bottom, a magnetic component inside the pressing shaft, and a silent pad inside the pressing shaft. The base has a guide cavity, and the opening edge of the guide cavity facing the pressing shaft is constructed with a concave-convex structure. When the pressing shaft is pressed to the bottom, the silent pad abuts against the edge of the concave-convex structure.

[0008] Preferably, the bottom of the pressing shaft is provided with a guide post, and the middle of the silencing pad is provided with a through hole, and the silencing pad is sleeved on the outside of the guide post through the through hole.

[0009] Preferably, the noise-reducing pad further includes at least one fixing part, and the pressing shaft is provided with a mounting structure that cooperates with the fixing part. The fixing part cooperates with the mounting structure to fix the noise-reducing pad to the pressing shaft.

[0010] Preferably, the fixing part is an L-shaped bent end extending outward from the body of the sound-silencing pad, and the mounting structure is a mounting hole provided on both sides of the pressing shaft, with the L-shaped bent end passing through the mounting hole for fixing.

[0011] Preferably, a limiting stop block is provided on the sidewalls on both sides of the pressing shaft, and the mounting hole or slot is provided on the limiting stop block.

[0012] Preferably, the device also includes a housing that is fastened to the base; when the pressing shaft is reset, the end of the L-shaped bent end abuts against the housing to achieve buffering and noise reduction at the upper limit position.

[0013] Preferably, the concave-convex structure of the guide cavity includes multiple protrusions, and the top surfaces of each protrusion are located on the same plane.

[0014] Preferably, the concave-convex structure of the guide cavity is serrated, wavy, or crenellated.

[0015] Preferably, the sound-absorbing pad is made of silicone, rubber, or thermoplastic elastomer.

[0016] The beneficial effects of this utility model are as follows: the uniquely designed silent pad effectively eliminates bottoming and rebound noise; the silent pad directly abuts against the guide cavity, ensuring a stable installation; the force center of the silent pad coincides with the core of the pressing shaft, preventing the silent pad from shifting due to uneven force, thus ensuring stable pressing feel and signal accuracy of the magnetic shaft; in addition, the innovatively designed concave-convex edge of the guide cavity achieves stable contact and smooth airflow; all components of this magnetic shaft form an organic whole, with a clever overall structure and significantly improved performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the base structure in this utility model;

[0020] Figure 4 This is a cross-sectional view of the initial state of this utility model;

[0021] Figure 5 This is a cross-sectional view of the present invention in the pressed state;

[0022] Figure 6 This is an exploded view of the present invention.

[0023] In the diagram: 1. Housing; 2. Pressing shaft; 21. Guide post; 22. Mounting hole; 23. Limiting top stop block; 3. Silent pad; 31. Through hole; 32. L-shaped bent end; 4. Base; 41. Guide cavity; 42. Protrusion; 5. Elastic reset component; 6. Magnetic component. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. To provide a clear and complete description of the technical solution, the following embodiments are selected for illustration; these embodiments are only some embodiments of the present invention; other embodiments obtained based on this application without creative effort are all within the scope of protection of the present invention.

[0025] In the following embodiments, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "top / bottom," etc., are all based on the orientation or positional relationship shown in the accompanying drawings and are only for the purpose of clearly describing this embodiment. They do not indicate or imply that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this application. At the same time, the terms "first" and "second" in the embodiments are only used for descriptive purposes and do not represent an indication or implication of relative importance.

[0026] like Figure 1-6 As shown, the specific embodiment of this utility model is a silent magnetic shaft, which mainly includes a housing 1, a pressing shaft 2, a silent pad 3, a base 4, and an elastic reset component 5 (spring).

[0027] The press shaft 2 is movably mounted between the housing 1 and the base 4. A guide post 21 is located at the center of the bottom of the press shaft 2. Outwardly protruding limiting blocks 23 are integrally formed on both side walls of the press shaft, and these limiting blocks 23 have mounting holes 22. An elastic reset member 5 is sleeved outside the guide post 21, with its two ends abutting against the press shaft 2 and the base 4 respectively. A magnetic component 6 is installed inside the press shaft 2 to cooperate with a Hall sensor on the keyboard PCB board for trigger sensing.

[0028] The noise-reducing pad 3 is made of silicone and has a through hole 31 in the middle and L-shaped bent ends 32 extending outward on both sides. During assembly, the noise-reducing pad 3 is fitted onto the guide post 21 of the pressing shaft 2 through the through hole 31 to achieve initial positioning. The purpose of this design is to make the force center of the noise-reducing pad 3 coincide with the shaft core of the pressing shaft 2, preventing the noise-reducing pad from shifting due to uneven force and ensuring a stable pressing feel. Then, the L-shaped bent ends 32 on both sides are passed through the mounting holes 22 on the pressing shaft 2, so that the L-shaped bent ends 32 are firmly fastened to the pressing shaft 2. This application highly integrates the fixing function of the noise-reducing pad, the limiting function of the upper and lower stroke, and the bidirectional buffering and noise reduction function, thereby simplifying the structure, facilitating assembly, and achieving improved performance in terms of pressing stability, quietness, and smoothness.

[0029] The base 4 has a guide cavity 41, which is constructed with a concave-convex structure facing the opening edge of the pressing shaft 2. Specifically, this structure includes multiple protrusions 42, and the top surfaces of all protrusions 42 are located on the same horizontal plane. That is to say, when the silencing pad 3 touches the bottom, it is still a complete and stable plane. The silencing pad 3 can deform evenly on this plane, avoiding shaking caused by uneven force, and achieving a balance between exhaust and stability. Figure 3 The image shows a crenellated (rectangular) protrusion, but it could also be a serrated (triangular) protrusion or a wavy (semi-circular) protrusion. These protrusions 42 form recessed venting gaps.

[0030] The working principle of this magnetic shaft is as follows: When the button is pressed, the pressing shaft 2 moves downward, and the silencing pad 3 moves downward along with it. When pressed to the bottom, the lower surface of the silencing pad 3 contacts the top surface of the protrusion 42 on the edge of the guide cavity 41 of the base 4, achieving bottoming-out silence by utilizing the properties of the silicone material. During this process, air can be quickly discharged through the exhaust gap between the protrusions 42, completely avoiding jamming and ensuring a smooth feel. When the button is reset, the silencing pad 3 is reset by the action of the elastic reset component, and the limiting top stop block 23 is restricted by the housing 1. At this time, the end of the L-shaped bent end 32 of the silencing pad 3 abuts against the inner top wall of the housing 1, which also plays a role in buffering and silencing.

[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 minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present utility model should be included within the protection scope of the technical solution of the present utility model.

Claims

1. A silent magnetic shaft, comprising a base and a pressing shaft movable up and down relative to the base, wherein the pressing shaft has an elastic reset member at its bottom and a magnetic element is assembled inside the pressing shaft, characterized in that: A sound-silencing pad is installed inside the pressing shaft; the base has a guide cavity, and the opening edge of the guide cavity facing the pressing shaft is constructed with a concave-convex structure; when the pressing shaft is pressed to the bottom, the sound-silencing pad abuts against the edge of the concave-convex structure.

2. The silent magnetic shaft according to claim 1, characterized in that: The bottom of the pressing shaft is provided with a guide post, and the middle of the silencing pad is provided with a through hole. The silencing pad is sleeved on the outside of the guide post through the through hole.

3. The silent magnetic shaft according to claim 2, characterized in that: The noise-reducing pad also includes at least one fixing part, and the pressing shaft is provided with a mounting structure that cooperates with the fixing part. The fixing part cooperates with the mounting structure to fix the noise-reducing pad to the pressing shaft.

4. The silent magnetic shaft according to claim 3, characterized in that: The fixing part is an L-shaped bent end extending outward from the body of the sound-silencing pad, and the mounting structure is a mounting hole provided on the side wall of the pressing shaft, through which the L-shaped bent end passes and is fixed.

5. The silent magnetic shaft according to claim 4, characterized in that: Limiting top stops are provided on the side walls on both sides of the pressing shaft, and the mounting holes or slots are provided on the limiting top stops.

6. The silent magnetic shaft according to claim 5, characterized in that: It also includes a housing that is fastened to the base; when the pressing shaft is reset, the end of the L-shaped bent end abuts against the housing to achieve buffering and silence at the upper limit position.

7. The silent magnetic shaft according to claim 1, characterized in that: The concave-convex structure of the guide cavity includes multiple protrusions, and the top surfaces of each protrusion are located on the same plane.

8. The silent magnetic shaft according to claim 7, characterized in that: The concave-convex structure of the guide cavity is sawtooth-shaped, wavy, or crenellated.

9. The silent magnetic shaft according to any one of claims 1-8, characterized in that: The sound-absorbing pad is made of silicone, rubber, or thermoplastic elastomer.

Images