Key shaft body for reducing rebound impact sound

Abstract

The application relates to the technical field of key shaft bodies, in particular to a key shaft body capable of reducing rebound impact sound. The key shaft body is slidably arranged in a key shell and cooperates with a reset spring in the key shell to realize stable pressing and rebounding actions. The key shaft body comprises a body, the bottom of the body extends downward to form a key shaft, and the top of the body is provided with a key cap connecting part used for connecting a key cap. A complete or partial wall structure is further formed by extending downward from the outer edge of the bottom of the body, and elastic clamping teeth with rebound characteristics are arranged on the wall structure. When the key shaft body contacts with the upper cover of the key shell during the rebound reset process, the elastic clamping teeth effectively absorb the collision impact energy through self elastic deformation, so that the impact noise generated in the rebound stage is significantly reduced. The key shaft body can significantly reduce the collision noise and vibration without sacrificing the key response speed and tactile feedback, and the mute performance and use comfort of the keyboard product are improved.

Description

Technical Field

[0001] This application relates to the field of key switch technology, and in particular to a key switch that reduces rebound impact noise. Background Technology

[0002] In the field of key switch technology, existing designs typically include a keycap, a spring-loaded reset structure, and a trigger mechanism. When a user presses the keycap, the elastic element (such as a rubber dome or spring) deforms to provide feedback force and trigger a signal; after releasing the key, the elastic element quickly rebounds, causing the keycap to reset. During this process, the keycap or internal moving parts often collide with the limiting structure at the reset endpoint, producing noticeable impact noise and vibration. This noise and tactile discomfort caused by the rebound impact, especially in high-speed continuous input or quiet environments, has become a key issue affecting user experience.

[0003] Existing technologies have explored various methods to reduce rebound impact noise, such as adding cushioning materials (e.g., silicone pads, foam patches) to the bottom of the keycap or base, or adjusting the stiffness and travel of the elastic element to reduce rebound speed. However, these methods often have significant limitations: adding cushioning materials increases structural complexity and production costs, and may affect the consistency of key travel and tactile clarity; while simply adjusting elastic parameters makes it difficult to balance rapid reset and cushioning requirements, potentially leading to delayed response or accidental keystrokes. The fundamental reason is that traditional designs rely on the reset capability of a single elastic element, failing to effectively control the energy release and termination process during the rebound phase. This results in the inefficient absorption or dispersion of impact energy, causing structural vibration and noise.

[0004] Therefore, it is of great significance to develop a key switch technology that can effectively reduce rebound impact noise. Utility Model Content

[0005] The purpose of this application is to overcome at least one deficiency of the existing technology and provide a key switch that reduces rebound impact noise. This key switch can significantly reduce impact noise and vibration without sacrificing key response speed and tactile feedback, thereby improving the quietness and comfort of keyboard products and making it more suitable for noise-sensitive users in office, gaming and other scenarios.

[0006] To achieve the above objectives, this application discloses a key switch that reduces rebound impact noise. The key switch is slidably disposed inside the key housing and cooperates with a return spring located within the key housing to achieve stable pressing and rebound actions. The key switch includes a body, with the bottom extending downwards to form the key shaft and the top having a keycap connecting portion for connecting keycaps. A complete or partial enclosure structure extends further downwards from the outer edge of the bottom of the body, and this enclosure is provided with elastic retaining teeth possessing rebound characteristics. When the key switch contacts the top cover of the key housing during the rebound reset process, the elastic retaining teeth effectively absorb the impact energy through their own elastic deformation, thereby significantly reducing the impact noise generated during the rebound phase.

[0007] Furthermore, at least one arc-shaped protrusion is provided at the bottom end of the key shaft. This arc-shaped protrusion improves the impact characteristics and enhances the crispness of the key-hitting sound by reducing the contact area between the key shaft and the inner bottom surface of the key housing, thereby concentrating and optimizing the stress distribution during impact, while maintaining the clarity of tactile feedback.

[0008] Furthermore, the enclosure structure is also equipped with a guide structure that cooperates with the button housing, specifically a linear guide groove or linear guide strip. This guide structure can constrain the movement trajectory of the button shaft during the pressing and rebound process, ensuring that it slides smoothly in a predetermined direction, reducing uneven wear and jamming, and further improving the stability and smoothness of the action.

[0009] Furthermore, the enclosure structure extends upward to form an upper enclosure section.

[0010] Furthermore, the key shaft is designed as a hollow shaft structure, with a magnetic column or magnetic block fixedly installed inside. This magnetic column or magnetic block can cooperate with an external sensor to achieve non-contact signal triggering.

[0011] Compared with the prior art, this application has at least one of the following beneficial technical effects: 1. By setting up an elastic tooth structure with rebound characteristics, the impact energy of the key shaft hitting the key housing when it rebounds and resets is effectively absorbed, significantly reducing rebound impact noise, while maintaining the original tactile feedback characteristics of the key. 2. Through the cooperation of the arc-shaped protrusion structure and the guide mechanism, the contact area is reduced to improve the crispness of the key press sound, while ensuring the stability of the key movement trajectory and improving the smoothness and reliability of the pressing operation. 3. By designing the upper enclosure section, the guide stroke is increased, thus improving operational stability.

[0012] The beneficial effects listed above are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation methods will be further disclosed in the embodiments or other descriptive sections of this application. Attached Figure Description

[0013] A better understanding of various aspects of this disclosure will be achieved by reading the following detailed description in conjunction with the accompanying drawings. The positions, dimensions, and extents of the structures shown in the drawings, etc., do not always represent actual positions, dimensions, and extents. In the drawings: Figure 1 This is a schematic diagram of the structure of the first embodiment disclosed in this application, in which the bottom end of the key shaft is provided with an arc-shaped protrusion.

[0014] Figure 2 This is a schematic diagram of the structure of the first embodiment disclosed in this application from another perspective.

[0015] Figure 3 This is a schematic diagram of the structure of the first embodiment disclosed in this application when it is fitted with the upper cover in the button housing.

[0016] Figure 4 This is a schematic diagram of the structure of the second embodiment disclosed in this application, which has an upper enclosure structure.

[0017] Figure 5 This is a schematic diagram of the third embodiment disclosed in this application, in which the bottom end of the key shaft has no arc-shaped protrusion. Detailed Implementation

[0018] The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0019] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0020] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. All terms used in this specification (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail; however, where appropriate, such techniques, methods, and apparatus should be considered part of this specification.

[0021] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term “and / or” used in this specification includes any and all combinations of one or more of the relevant listed items.

[0022] Referring to the attached drawings, the key switch includes a body 1 that is slidably disposed inside the key housing, such as... Figure 1 As shown, the key shaft 2 extends from the bottom of the main body 1 and works in conjunction with the reset spring (not shown in the figure) located inside the key housing to achieve the pressing and rebound action.

[0023] The keycap connecting part 3 at the top is used to form a reliable connection with the keycap. At the same time, the elastic buckle 6 on the outside of the enclosure structure 4 contacts the inside of the key shell cover to buffer the impact. The arc-shaped protrusion 7 at the bottom of the key shaft 2 optimizes the impact characteristics. The guide structure 8 on the enclosure structure 4 ensures the stability of the movement trajectory.

[0024] Furthermore, the main body 1 is integrally injection molded from plastic. The outer side of the enclosure structure 4 formed by the extension of its bottom outer edge is provided with outwardly extending elastic buckles 6. The root of the elastic buckle 6 is connected to the outer surface of the enclosure structure 4, while its free end extends outward, forming a cantilever beam structure capable of axial elastic deformation. When the button rebounds to the upper stop point... Figure 3 As shown, the free end of the elastic buckle 6 first contacts the limiting area inside the upper cover. The axial bending deformation of the elastic buckle 6 converts the collision kinetic energy into elastic potential energy. By extending the collision time, the instantaneous impact force is reduced. At the same time, the mechanical energy is converted into heat energy and dissipated by the friction between the molecular chains inside the material, thereby effectively suppressing the generation of vibration noise.

[0025] Subsequently, as Figure 1 and Figure 2 In the embodiment shown, the arc-shaped protrusion 7 at the bottom of the key shaft 2 adopts a hemispherical design. Its point contact with the bottom surface of the key housing concentrates the impact force in a specific area. By increasing the impact pressure per unit area, a higher frequency sound wave signal is generated, thereby forming a crisp striking sound effect while ensuring the clarity of tactile feedback.

[0026] Preferably, the guide structure 8 provided on the outer side of the enclosure structure 4 and the key housing are a sliding pair with clearance fit of the protrusion or guide strip. The guide structure 8 restricts the radial degree of freedom of the key when it moves in the vertical direction to ensure smooth sliding.

[0027] like Figure 4In the second embodiment shown, the upper enclosure section 5, which extends upward from the enclosure structure 4 and forms on the upper part of the body 1, forms a guiding mechanism with the opening of the mechanical switch housing during the button movement. By extending the guiding contact surface, the guiding stroke is effectively increased. This structure enables the button to maintain a stable vertical movement trajectory throughout the entire movement, significantly reducing button shaking and deflection, thereby improving the smoothness and stability of button operation.

[0028] Furthermore, the neodymium iron boron magnet fixedly installed inside the key shaft 2 and the Hall sensor on the PCB board constitute a non-contact detection module. This magnetoelectric conversion method is within the scope of existing technology. It achieves trigger signal output by detecting changes in magnetic flux, thus avoiding additional vibration noise generated by mechanical contacts.

[0029] In addition, such as Figure 5 In the third embodiment shown, the bottom end of the key shaft 2 does not have an arc-shaped protrusion 7 structure. This configuration is suitable for application scenarios with different requirements for the sound of the key strike. By omitting the arc-shaped protrusion 7, the key shaft 2 forms a surface contact with the bottom surface of the key housing, producing a relatively dull impact sound effect, while maintaining the rebound noise reduction function brought by the elastic buckle 6.

[0030] It should be understood that the preferred embodiments of this application are illustrated by way of example in this specific embodiment. However, other embodiments that can be naturally derived by those skilled in the art based on the concepts disclosed in this application, combined with common knowledge and conventional technical means, should all fall within the protection scope of this application. The description of this specific embodiment is only used to illustrate the technical solutions of this application and is not intended to limit the protection scope of this application. Any equivalent modifications or substitutions made based on the essential spirit of this application should be considered as included within the protection scope of this application.

[0031] While exemplary embodiments of this disclosure have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of this disclosure without departing from the spirit and scope thereof. Therefore, all changes and modifications are included within the scope of protection of this disclosure as defined by the claims. This disclosure is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. A key shaft for reducing rebound impact noise, the key shaft being slidably disposed inside a key housing and cooperating with a return spring located in the key housing, characterized in that, The key switch includes a body, with the bottom of the body extending downward to form the key switch, and the top having a keycap connecting part for connecting keycaps; the bottom outer edge of the body extends further downward to form a complete or partial enclosure structure, and the enclosure is provided with elastic teeth with rebound characteristics.

2. A key switch for reducing rebound impact noise as described in claim 1, characterized in that, At least one arc-shaped protrusion is provided at the bottom end of the key shaft.

3. A key switch for reducing rebound impact noise as described in claim 1, characterized in that, The enclosure structure is also equipped with a guide structure that cooperates with the button housing.

4. A key switch for reducing rebound impact noise as described in claim 3, characterized in that, The guiding structure is a linear guide groove or a linear guide bar.

5. A key switch for reducing rebound impact noise as described in claim 1, characterized in that, The enclosure structure extends upward to form the upper enclosure section.

6. A key switch for reducing rebound impact noise as described in claim 1, characterized in that, The key shaft is designed as a hollow shaft structure, with a magnetic column or magnetic block fixedly installed inside. This magnetic column or magnetic block can cooperate with an external sensor to achieve non-contact signal triggering.

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