Key sleeve

Abstract

The invention provides a key sleeve which sleeves a key generating a sound source and comprises a pressing part and a sleeving part which are oppositely arranged on a body, and an inner cavity is formed between the pressing part and the sleeving part; the first reflecting layer is arranged in the inner cavity, a first reflecting cavity is defined by the first reflecting layer and the sleeving part, the direction perpendicular to the surface of the key is marked as the first direction, the first reflecting layer is obliquely arranged inwards from the inner wall of the inner cavity in the first direction, a reflecting opening is defined by the first reflecting layer and the inner wall of the inner cavity, the reflecting opening faces the key, and the opening of the key is gradually reduced in the first direction; the multiple sound absorption holes are formed in the inner wall of the inner cavity, communicate with the reflection cavity and are used for absorbing sound waves. According to the key sleeve provided by the invention, the sound wave is guided into the reflection cavity through the first reflection layer, and the sound wave energy is effectively dispersed and attenuated through the design that the reflection opening is gradually reduced. And in cooperation with the combination of the multiple sound absorption holes, sound waves are guided into the sound absorption holes, and the noise treatment effect is optimized.

Description

Technical Field

[0001] The present application relates to the technical field of key covers, and in particular to a key cover. Background Art

[0002] As an indispensable component of electronic devices, silicone keypad covers are widely used in various keypad devices. Their main functions include protecting keys, providing a comfortable operating feel, and reducing the noise generated during key operation to a certain extent. With the popularization of electronic devices and the improvement of users' requirements for user experience, the design of silicone keypad covers has become more sophisticated and the functions have become more diversified.

[0003] In order to further reduce the noise generated when the keys are pressed, the prior art has proposed a variety of improvement schemes. Some designs fill the silicone sleeve with flexible materials, such as foam, fiber, etc., to enhance its sound absorption effect. In addition, increasing the thickness of the silicone sleeve is also a common noise reduction method, which reduces the transmission of noise by increasing the buffer area when the keys are pressed.

[0004] Although filling the inside with flexible materials and increasing the thickness can reduce the noise during key operation, these solutions also have certain defects. Although increasing the thickness of silicone can reduce noise to a certain extent, it will also affect the touch of the keys; filling the inside with flexible materials will cause the rebound performance of the keys to decrease, and the noise reduction effect is not ideal. Summary of the invention

[0005] In view of this, it is necessary to provide a key cover that can better absorb the noise generated during key operation to solve the above problem.

[0006] The embodiment of the present application provides a key cover, which is mounted on a key that generates a sound source, including:

[0007] The main body comprises a pressing portion and a sleeve portion which are arranged opposite to each other, and an inner cavity is opened between the pressing portion and the sleeve portion;

[0008] A first reflective layer is disposed in the inner cavity and enclosed with the sleeve portion to form a first reflective cavity. The direction perpendicular to the key surface is recorded as a first direction. The first reflective layer is inclined inwardly from the inner wall of the inner cavity along the first direction and encloses a reflective opening with the inner wall of the inner cavity. The reflective opening faces the key, and the key opening gradually decreases along the first direction.

[0009] A plurality of sound absorbing holes are provided on the inner wall of the inner cavity and connected to the reflection cavity, and are used to absorb sound waves when the sound waves are reflected by the first reflection cavity and enter the sound absorbing holes.

[0010] In at least one embodiment of the present application, the sound absorbing hole includes a first inclined portion and a second inclined portion that are interconnected;

[0011] The first inclined portion is inclined outwardly from the inner wall of the inner cavity along the first direction, and the opening of the second inclined portion is away from the first inclined portion and close to the outer surface of the side wall of the main body. The angle between the central axis of the first inclined portion and the central axis of the second inclined portion is defined as a, 60°≤a≤120°, and the side wall of the main body blocks the end of the second inclined portion away from the first inclined portion.

[0012] In at least one embodiment of the present application, the sleeve portion is recessed along the first direction to form an inclined surface, the inclined surface is arranged in the first reflection cavity and surrounds the sleeve portion, and the central axis of the first inclined portion is perpendicular to the inclined surface.

[0013] In at least one embodiment of the present application, the key silicone cover also includes a sound absorbing block, which is filled in the sound absorbing hole, and the angle between the central axis of the first inclined portion and the horizontal plane of the bottom of the first reflection cavity is 45°.

[0014] In at least one embodiment of the present application, the key silicone cover further includes a sound absorbing member, and the inner wall extends inwardly to form the sound absorbing member;

[0015] The pressing portion and the first reflecting layer are combined to form a second reflecting cavity. The sound absorbing member is arranged in a ring shape on the inner wall of the second reflecting cavity. A plurality of the sound absorbing members are arranged in an array along a vertical direction.

[0016] In at least one embodiment of the present application, the sound absorbing member further includes an arc surface portion, the arc surface portion is arranged away from the inner wall of the body, and a sound waveguide groove is formed between two adjacent arc surface portions for absorbing low-frequency sound waves.

[0017] In at least one embodiment of the present application, the key silicone cover includes a second reflective layer, the second reflective layer is arranged on the inner wall of the inner cavity, a third reflective cavity is formed between the pressing portion and the second reflective layer, and the first reflective cavity, the second reflective cavity and the third reflective cavity are arranged in sequence along the vertical direction;

[0018] The second reflective layer further includes a first isolation layer, a second isolation layer and an elastic layer, wherein the elastic layer is disposed between the first isolation layer and the second isolation layer.

[0019] In at least one embodiment of the present application, the thickness of the pressing portion along the vertical direction is defined as b, 0.5 mm ≤ b ≤ 1 mm;

[0020] The pressing portion is provided with grooves, the grooves are arranged in a honeycomb shape, and a plurality of the grooves are evenly arranged on a side of the pressing portion away from the contact end.

[0021] In at least one embodiment of the present application, the key silicone sleeve further includes a support layer, and the support layer is disposed in the inner cavity;

[0022] One end of the support layer is arranged on the pressing part, and the other end is fixedly connected to the sleeve part, and the support layer is located at the geometric center of the key silicone sleeve.

[0023] In at least one embodiment of the present application, the button silicone sleeve also includes a pressure equalizing layer, which is arranged in the inner cavity and fits the sleeve part, and one end of the support layer away from the pressing part is fixedly connected to the pressure equalizing layer.

[0024] The above-mentioned button cover guides the sound waves into the reflection cavity through the first reflection layer, and effectively disperses and attenuates the sound wave energy through the design of gradually reducing the reflection opening. With the combination of multiple sound-absorbing holes, the sound waves are effectively guided into the sound-absorbing holes, and multiple reflections and gradual absorption of the sound waves can be achieved within a limited path, thereby optimizing the noise processing effect. It can achieve better noise reduction effect while maintaining a good operating touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional diagram of a button cover in one embodiment of the present application.

[0026] Figure 2 for Figure 1 An enlarged view of the multi-layer reflective cavity of the key cover.

[0027] Figure 3 for Figure 1 An enlarged cross-sectional view of the internal structure of the key cover.

[0028] Figure 4 for Figure 1 A three-dimensional diagram of the pressing portion of the key cover.

[0029] Figure 5 for Figure 1 A three-dimensional diagram of the first reflective cavity of the key cover.

[0030] Main component symbols

[0031] 100. A key cover; 10. Main body; 11. Pressing part; 111. Groove; 12. Sleeve part; 121. Inclined surface; 13. Inner cavity; 20. First reflecting layer; 21. First reflecting cavity; 30. Sound absorbing hole; 31. First inclined part; 32. Second inclined part; 33. Sound absorbing block; 40. Second reflecting cavity; 41. Sound absorbing member; 411. Arc part; 412. Sound waveguide groove; 50. Second reflecting layer; 51. Third reflecting cavity; 52. First isolation layer; 53. Second isolation layer; 54. Elastic layer; 60. Support layer; 70. Pressure equalizing layer. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0033] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0034] The embodiment of the present application provides a key cover, which is mounted on a key that generates a sound source, including:

[0035] The main body comprises a pressing portion and a sleeve portion which are arranged opposite to each other, and an inner cavity is opened between the pressing portion and the sleeve portion;

[0036] A first reflective layer is disposed in the inner cavity and enclosed with the sleeve portion to form a first reflective cavity. The direction perpendicular to the key surface is recorded as a first direction. The first reflective layer is inclined inwardly from the inner wall of the inner cavity along the first direction and encloses a reflective opening with the inner wall of the inner cavity. The reflective opening faces the key, and the key opening gradually decreases along the first direction.

[0037] A plurality of sound absorbing holes are provided on the inner wall of the inner cavity and connected to the reflection cavity, and are used to absorb sound waves when the sound waves are reflected by the first reflection cavity and enter the sound absorbing holes.

[0038] The above-mentioned button cover guides the sound waves into the reflection cavity through the first reflection layer, and effectively disperses and attenuates the sound wave energy through the design of gradually reducing the reflection opening. With the combination of multiple sound-absorbing holes, the sound waves are effectively guided into the sound-absorbing holes, and multiple reflections and gradual absorption of the sound waves can be achieved within a limited path, thereby optimizing the noise processing effect. It can achieve better noise reduction effect while maintaining a good operating touch.

[0039] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] See also Figure 1-Figure 5 The embodiment of the present application provides a key cover 100, which is mounted on a key that generates a sound source, and includes:

[0041] The body 10 includes a pressing portion 11 and a sleeve portion 12 which are arranged opposite to each other, and an inner cavity 13 is formed between the pressing portion 11 and the sleeve portion 12;

[0042] The first reflective layer 20 is disposed in the inner cavity 13 and encloses the first reflective cavity 21 with the sleeve portion 12. The direction perpendicular to the key surface is recorded as the first direction. The first reflective layer 20 is inclined inwardly along the first direction from the inner wall of the inner cavity 13 and encloses a reflective opening with the inner wall of the inner cavity 13. The reflective opening faces the key, and the key opening gradually decreases along the first direction.

[0043] The sound absorbing holes 30 are arranged on the inner wall of the inner cavity 13 and connected to the reflection cavity, so as to absorb the sound waves when the sound waves are reflected by the first reflection cavity 21 and enter the sound absorbing holes 30 .

[0044] Specifically, it includes a pressing portion 11 and a sleeve portion 12. The pressing portion 11 is the area where the user's finger contacts, and the sleeve portion 12 is used to wrap the key body 10. By providing an inner cavity 13 between the pressing portion 11 and the sleeve portion 12, sufficient space can be provided for the internal structure to achieve reflection and absorption of sound waves, thereby effectively reducing noise. The design of the first reflective layer 20 allows the sound waves generated during key operation to be reflected in the inner cavity 13, and multiple reflections help to reduce the energy of the sound waves. As the reflection opening gradually decreases, the sound waves are gradually guided to a specific position to prevent the direct propagation of the sound waves, thereby reducing noise.

[0045] In a specific embodiment, the key cover body 10 is made of silicone. Silicone has extremely high flexibility and elasticity, can be easily bent, compressed and stretched, can adapt to the design of complex shapes, and quickly return to its original shape after being subjected to external forces. For keys that need to be operated frequently or structures that require flexible support, silicone can provide a comfortable touch and continuous elastic response.

[0046] Furthermore, the sound-absorbing holes 30 are designed to capture the reflected sound waves and absorb the sound wave energy through the sound-absorbing material filled inside, thereby reducing the noise. This design allows both high-frequency and low-frequency sound waves to be effectively controlled and absorbed. The sound-absorbing holes 30 can significantly reduce the noise generated during key operation and avoid the secondary propagation of sound waves. By absorbing sound waves, the overall noise reduction effect of the key cover is improved, providing users with a quieter operating experience.

[0047] Furthermore, during operation, the key generates sound waves that penetrate the sleeve 12 along the key surface and enter the inner cavity 13. The first reflection cavity 21 is formed by the inner wall of the inner cavity 13 and the first reflection layer 20. The reflection layer is tilted so that the sound waves are continuously reflected after entering the reflection cavity. With the multiple reflections of the sound waves in the first reflection cavity 21, the direction of the sound waves will be changed and guided. Since the first reflection layer 20 is tilted and the opening of the reflection cavity gradually decreases along the first direction perpendicular to the key surface, the sound waves are guided to a narrower area. In this process, the energy of the sound waves gradually weakens, reducing the intensity of their propagation.

[0048] Furthermore, when the sound waves are guided to a narrower area, the sound waves will be reflected back to the surface of the sleeve portion 12, and a part of the sound waves will enter the sound absorbing hole 30 through the sound absorbing hole 30 provided on the inner wall of the inner cavity 13. The material in the sound absorbing hole 30 can effectively absorb the energy of the sound waves. The sound absorbing holes 30 are designed to be multiple and distributed on the inner wall of the inner cavity 13, which can capture and absorb the sound waves to the maximum extent. This process significantly reduces the energy of the sound waves, and ultimately reduces the noise.

[0049] In a specific embodiment, the sound absorbing hole 30 includes a first inclined portion 31 and a second inclined portion 32 that are interconnected;

[0050] The first inclined portion 31 is inclined outwardly from the inner wall of the inner cavity 13 along the first direction, and the opening of the second inclined portion 32 away from the first inclined portion 31 is close to the outer surface of the side wall of the main body 10. The angle between the central axis of the first inclined portion 31 and the central axis of the second inclined portion 32 is defined as a, 60°≤a≤120°, and the side wall of the main body 10 blocks the end of the second inclined portion 32 away from the first inclined portion 31.

[0051] Specifically, the two inclined portions are arranged in an inverted V shape, and the inverted V-shaped arrangement causes the sound waves to be refracted and reflected multiple times in the direction of the two inclined portions in the hole. This design can effectively increase the path length of the sound waves in the hole, ensuring that the sound waves have more opportunities to contact the hole wall, thereby improving the absorption effect of the sound waves. The inverted V-shaped design causes the sound waves to scatter between the two inclined portions, reducing the linear propagation of the sound waves and optimizing the distribution and diffusion of the sound waves. When the sound waves pass through the V-shaped hole, they will be dispersed in different directions, thereby enhancing the processing effect of the sound waves. By optimizing the scattering of the sound waves, the sound waves in different directions can be processed more evenly, improving the comprehensiveness of the noise control.

[0052] Furthermore, the angle between the two inclined portions (60° to 120°) allows the sound waves to be more reflected in the hole when passing through the sound absorbing hole 30. This angle setting optimizes the propagation path of the sound waves in the hole, enhances the multiple reflections of the sound waves, increases the propagation distance of the sound waves in the hole, and further enhances the noise reduction effect. The opening of the first inclined portion 31 faces the sleeve portion 12. This design makes it easier to guide the sound waves generated from the key to enter the sound absorbing hole 30. This design can effectively guide the sound waves into the hole along the direction of the inclined portion, thereby optimizing the path of the sound waves.

[0053] Furthermore, the blocked sidewalls can effectively prevent sound waves from being directly transmitted to the outside from the sound absorbing hole 30. After the sound waves are reflected and refracted multiple times by the first and second inclined portions 32, if the sidewalls are not blocked, the sound waves may escape directly without being completely absorbed, thereby reducing the overall noise reduction effect. The blocking design helps to form a more closed acoustic environment inside the sound absorbing hole 30. By increasing the number of reflections of the sound waves, the energy of the sound waves in the hole is gradually reduced, thereby improving the sound absorption efficiency.

[0054] In a specific embodiment, the sleeve portion 12 is recessed along the first direction to form an inclined surface 121 . The inclined surface 121 is disposed in the first reflection cavity 21 and surrounds the sleeve portion 12 . The central axis of the first inclined portion 31 is perpendicular to the inclined surface 121 .

[0055] Specifically, the sleeve portion 12 is recessed in the first direction to form an inclined surface 121. The design of this inclined surface 121 helps to improve the propagation path of the sound waves. It interacts with other structures in the reflection cavity (such as the first reflection layer 20). The contact efficiency between the sound waves and the reflection layer is improved, thereby improving the reflection and absorption effects of the sound waves. The surrounding arrangement of the inclined surface 121 enables all sound waves generated from the keys to be effectively guided and reflected in the first reflection cavity 21. In this way, the sound waves will not deviate from the designed path, but will be guided to the inside of the reflection cavity and make full use of the reflection effect.

[0056] Furthermore, the perpendicularity of the first inclined portion 31 to the inclined surface 121 enables sound waves to enter the sound-absorbing hole 30 from multiple angles, and multiple reflections can be achieved. This design allows sound waves to be reflected at different angles and paths in the inner cavity 13, thereby increasing the chances of sound waves contacting the sound-absorbing material. The sound waves experience more reflections and refractions in the inner cavity 13, which allows the sound wave energy to be more fully attenuated. If the sound wave can directly enter the sound-absorbing hole 30, it may not experience enough reflection process, thereby reducing the sound absorption effect. This design method ensures that the sound wave will be reflected multiple times in the inner cavity 13 before reaching the sound-absorbing hole 30, thereby effectively dispersing the sound wave energy and increasing the attenuation of the sound wave. This can prevent the sound wave from passing directly through the sound-absorbing hole 30 without sufficient reflection processing.

[0057] In a specific embodiment, the key silicone cover also includes a sound absorbing block 33, the sound absorbing block 33 is filled in the sound absorbing hole 30, and the angle between the central axis of the first inclined portion 31 and the horizontal plane at the bottom of the first reflection cavity 21 is 45°.

[0058] Specifically, the sound absorbing block 33 is filled in the sound absorbing hole 30, and its main function is to further enhance the sound absorption and noise reduction effect. The sound absorbing block 33 is usually made of a material with good sound absorption performance, such as polyurethane foam, sound absorbing sponge or other porous materials. By filling the sound absorbing block 33 in the sound absorbing hole 30, the residence time of the sound wave in the sound absorbing hole 30 can be effectively increased, and the contact area between the sound wave and the sound absorbing material can be increased, thereby improving the attenuation of the sound wave energy. The filling of the sound absorbing block 33 can reduce the reflection and transmission of the sound wave, and further reduce the noise generated when the button is operated.

[0059] In a specific implementation, the sound absorbing block 33 is a polyester fiber sound absorbing cotton. It performs particularly well in the high frequency band of sound waves. It has a loose structure and can effectively absorb sound waves passing through the sound absorbing holes. The polyester fiber sound absorbing cotton has a porous structure that can effectively absorb sound wave energy, especially high-frequency sound waves, and achieves gradual attenuation of sound waves through a multi-level structural design. In addition, the lightweight characteristics of the material can reduce the weight of the overall structure while maintaining a good sound absorption effect.

[0060] Furthermore, the angle between the central axis of the first inclined portion 31 and the horizontal plane at the bottom of the first reflection cavity 21 is set to 45°, in order to optimize the reflection path of the sound wave. The design angle of the inclined portion enables the sound wave to be reflected along a predetermined path when it contacts the bottom of the first reflection cavity 21. The 45° angle design can ensure that the sound wave has a high reflection efficiency during the reflection process, while reducing the straight-line propagation of the sound.

[0061] Furthermore, even if some sound waves directly enter the sound absorbing holes 30, the sound absorbing blocks 33 can still effectively attenuate the energy of these sound waves. The material of the sound absorbing blocks 33 usually has a high porosity and good sound wave absorption capacity, and it can absorb and scatter sound waves through the air layer and fiber structure inside the material. When the sound waves pass through the sound absorbing blocks 33, the energy is continuously attenuated. The design of the sound absorbing blocks 33 complicates the path of the sound waves, thereby increasing the residence time of the sound waves in the material, and ultimately the energy of the sound waves is effectively converted into heat energy, reducing noise.

[0062] In a specific embodiment, the key silicone cover further includes a sound absorbing member 41, and the inner wall extends inwardly to form the sound absorbing member 41;

[0063] The pressing portion 11 and the first reflective layer 20 are combined to form a second reflective cavity 40 . The sound absorbing member 41 is annularly disposed on the inner wall of the second reflective cavity 40 . A plurality of the sound absorbing members 41 are arranged in an array along the vertical direction.

[0064] Specifically, the setting of the sound absorbing member 41 can significantly enhance the noise reduction effect of the key silicone cover. The multi-layer sound absorption design of the sound absorbing member 41 can effectively absorb and attenuate sound waves, thereby reducing the noise generated by key operations. The sound absorbing member 41 is arranged in the second reflection cavity 40 to reduce the resonance phenomenon inside the cavity. Resonance amplifies sound waves of specific frequencies, resulting in increased noise. The sound absorbing member 41 reduces the resonance effect by absorbing sound waves of these frequencies.

[0065] Furthermore, the design of the sound absorbing member 41 increases the contact area between the sound wave and the sound absorbing material. Multiple sound absorbing members 41 are arranged in an array in the vertical direction, providing a larger sound absorbing surface, which helps to absorb the sound waves more comprehensively. The annular and vertical array design of the sound absorbing member 41 makes the propagation path of the sound wave in the cavity more complicated, reducing the single resonance mode formed by the sound wave in the cavity. The complex sound wave path helps to disperse and reduce the resonance phenomenon of a specific frequency.

[0066] In a specific embodiment, the sound absorbing member 41 further includes an arc surface portion 411 , and the arc surface portion 411 is disposed away from the inner wall of the body 10 , and a sound waveguide groove 412 is formed between two adjacent arc surface portions 411 for absorbing low-frequency sound waves.

[0067] Specifically, the arc surface 411 is designed to be curved, which helps to change the propagation path of the sound wave. When the sound wave is reflected on the surface of the arc surface 411, its path will be bent, thereby reducing the direct reflection and concentration of the sound wave. The arc surface 411 can effectively disperse the sound wave and reduce the interference and resonance phenomenon formed by the sound wave in the cavity. By bending the propagation path of the sound wave, the contact between the sound wave and the sound-absorbing material can be improved, thereby improving the absorption efficiency of the sound wave. The waveguide groove is a narrow and long groove 111 area, and its design can effectively capture and guide the sound wave. In particular, for the processing of low-frequency sound waves, the guide groove can make the propagation path of the low-frequency sound wave in the cavity more complicated, thereby enhancing the attenuation effect of the sound wave. Low-frequency sound waves are usually difficult to be effectively absorbed by traditional sound-absorbing materials. By designing the sound wave guide groove 412, the low-frequency sound wave can be reflected and scattered multiple times in the guide groove, the contact frequency between the sound wave and the sound-absorbing material is increased, and the absorption effect of the low-frequency sound wave is enhanced.

[0068] Furthermore, the bottom of the second reflection cavity 40 is the first reflection layer 20. After multiple reflections between the multiple arc surface parts 411, the sound waves are reflected to the inclined surface 121 of the first reflection layer 20. The inclined surface 121 guides the sound waves to a narrower area, and then reflects again into between the arc surface part 411 and the guide groove, thereby fully attenuating the energy of the low-frequency sound waves to achieve the effect of noise reduction.

[0069] In a specific embodiment, the key silicone cover includes a second reflective layer 50, the second reflective layer 50 is arranged on the inner wall of the inner cavity 13, a third reflective cavity 51 is formed between the pressing portion 11 and the second reflective layer 50, and the first reflective cavity 21, the second reflective cavity 40 and the third reflective cavity 51 are arranged in sequence along the vertical direction;

[0070] The second reflective layer 50 further includes a first isolation layer 52 , a second isolation layer 53 and an elastic layer 54 . The elastic layer 54 is disposed between the first isolation layer 52 and the second isolation layer 53 .

[0071] Specifically, the arrangement of the first isolation layer 52 and the second isolation layer 53 provides a multi-level sound wave isolation effect. This helps to reduce the direct propagation of sound waves and enhance the reflection effect of sound waves. The arrangement of the elastic layer 54 between the isolation layers can further enhance the reflection effect. The elastic layer 54 can absorb and buffer part of the sound wave energy during the sound wave propagation process, thereby effectively reducing noise.

[0072] In a specific embodiment, the elastic layer 54 is polyurethane foam. This material has good elasticity and sound absorption performance, and is particularly suitable for absorbing low-frequency sound waves. It can effectively buffer the impact of sound waves and gradually weaken the energy of sound waves.

[0073] Furthermore, the layer-by-layer design of each reflection cavity allows the sound waves to experience different reflection paths in multiple cavities. This multi-level reflection helps to gradually reduce the energy of the sound waves, rather than processing all the sound waves at once. As the sound waves enter different reflection cavities, their energy is gradually consumed. The design of each reflection cavity processes specific sound wave frequencies and energies, thereby achieving progressive sound wave attenuation. The elastic layer 54 in the second reflection layer 50 and the sound absorbing member 41 in the second reflection cavity 40 work together to further optimize the absorption and attenuation of the sound waves, especially for the processing of low-frequency sound waves.

[0074] In a specific embodiment, the thickness of the pressing portion 11 in the first direction is defined as b, 0.5 mm ≤ b ≤ 1 mm;

[0075] The pressing portion 11 is provided with grooves 111 , and the grooves 111 are arranged in a honeycomb shape. A plurality of the grooves 111 are evenly arranged on a side of the pressing portion 11 away from the contact end.

[0076] Specifically, the thickness is in the range of 0.5mm to 1mm, which can provide sufficient protection to prevent the keys from being easily worn out while maintaining a comfortable feeling when pressed. The appropriate thickness helps to absorb and reduce the sound waves generated when the keys are operated. A pressing portion 11 that is too thin may not be able to effectively isolate the noise, while a pressing portion 11 that is too thick may affect the sensitivity of the keys. The structure of the honeycomb groove 111 can effectively increase the surface area of ​​the pressing portion 11, so that the sound waves are reflected multiple times in the groove 111, thereby improving the sound absorption effect. The groove 111 design can provide additional shock absorbing effect during key operation and reduce the transmission of sound waves during pressing. The uniform arrangement of multiple grooves 111 helps the entire area of ​​the key to effectively control noise when pressed, rather than relying solely on a certain part of the key.

[0077] , the button silicone sleeve further includes a support layer 60, and the support layer 60 is disposed in the inner cavity 13;

[0078] One end of the support layer 60 is disposed on the pressing portion 11 , and the other end is fixedly connected to the sleeve portion 12 , and the support layer 60 is located at the geometric center of the key silicone sleeve.

[0079] In a specific embodiment, the support layer 60 is made of slightly harder silicone, which is stronger than ordinary silicone and helps provide additional support. It ensures that the key silicone cover does not deform excessively during use. The support layer 60 is located at the geometric center of the key silicone cover, which can effectively and evenly distribute the pressure of the pressing part 11. This uniform distribution helps to maintain the shape and structural stability of the key silicone cover and prevent local collapse or deformation of the key part.

[0080] Specifically, slightly harder silicone materials can effectively absorb and disperse the vibration generated when pressing. Compared with ordinary silicone, slightly harder silicone can better resist compression deformation and convert vibration energy into heat or reduce vibration through elastic recovery inside the material.

[0081] In a specific embodiment, the button silicone sleeve also includes a pressure equalizing layer 70 , which is disposed in the inner cavity 13 and fits the sleeve portion 12 , and one end of the support layer 60 away from the pressing portion 11 is fixedly connected to the pressure equalizing layer 70 .

[0082] Specifically, the pressure equalizing layer 70 is located in the inner cavity 13 of the key silicone sleeve and is attached to the sleeve portion 12. This design allows the pressure equalizing layer 70 to evenly distribute the pressure applied to the silicone sleeve during the pressing operation. The presence of the pressure equalizing layer 70 helps prevent the pressure from being concentrated in a small area of ​​the key silicone sleeve, thereby avoiding local excessive compression or deformation. This can reduce local damage or instability caused by uneven pressure.

[0083] Furthermore, when the user presses a key, the applied pressure first acts on the pressing portion 11. This part of the pressure will be evenly distributed to the sleeve portion 12 through the pressure equalizing layer 70. The pressure equalizing layer 70 evenly transfers the pressure to the support layer 60, ensuring that the entire area of ​​the key silicone sleeve is evenly stressed. The support layer 60, with its slightly harder nature, further enhances the support and shock absorption effect, preventing the key silicone sleeve from being excessively deformed, resulting in performance differences between the components in the inner cavity 13.

[0084] In summary, the sound waves generated by the keys first enter the inner cavity 13 of the key cover, and are reflected by the first reflective layer 20 to form the first reflective cavity 21. The inclined design of the first reflective layer 20 allows the sound waves to be reflected multiple times in the reflective cavity. The sound waves in the first reflective cavity 21 are guided to a narrower area through the gradually shrinking reflection opening, further changing the propagation path of the sound waves. After the sound waves are reflected by the first reflective cavity 21, part of the sound waves enter the internal sound-absorbing material through the sound-absorbing holes 30. Multiple sound-absorbing holes 30 are distributed on the wall of the inner cavity 13, and the sound waves are reflected and absorbed in these holes. The sound-absorbing blocks 33 filled in the sound-absorbing holes 30 further absorb the energy of the sound waves. The sound-absorbing member 41 is arranged in a ring in the second reflective cavity 40, which increases the contact area between the sound waves and the sound-absorbing material.

[0085] The sound waves enter the second reflection cavity 40 from the sound absorption holes 30 of the first reflection cavity 21. The sound absorbing member 41 in the second reflection cavity 40 and the inclined first reflection layer 20 work together to absorb and buffer low-frequency sound waves. In the second reflection cavity 40, the sound waves pass through the elastic layer 54, and the buffering effect of the elastic layer 54 reduces the energy of the sound waves, so that the sound waves can be more smoothly transferred to the third reflection cavity 51.

[0086] The sound waves pass through the elastic layer 54 and enter the third reflection cavity 51. In the third reflection cavity 51, the honeycomb structure performs post-processing on the remaining small amount of sound waves to further reduce the intensity of the sound waves. In the third reflection cavity 51, the honeycomb structure performs the final attenuation on the sound waves, and further absorbs and disperses the energy of the sound waves through its complex structure.

[0087] The sound waves undergo preliminary reflection and absorption in the first reflection cavity 21. The design of the inclined first reflection layer 20 and the sound absorbing holes 30 effectively reduces the intensity of the sound waves, especially for high-frequency sound waves. In the second reflection cavity 40, the combination of the sound absorbing member 41 and the first reflection layer 20 effectively absorbs and buffers low-frequency sound waves, reducing the energy of low-frequency sound waves. The elastic layer 54 further buffers the energy of the sound waves, making the propagation of the sound waves more stable and reducing the impact of high-intensity sound waves. In the third reflection cavity 51, the honeycomb structure post-processes the small amount of remaining sound waves, and further absorbs and disperses the energy of the sound waves through a complex structure.

[0088] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A key cover, which is mounted on a key that generates a sound source, characterized in that: include: The main body comprises a pressing portion and a sleeve portion which are arranged opposite to each other, and an inner cavity is opened between the pressing portion and the sleeve portion; A first reflective layer is disposed in the inner cavity and enclosed with the sleeve portion to form a first reflective cavity. The direction perpendicular to the key surface is recorded as a first direction. The first reflective layer is inclined inwardly from the inner wall of the inner cavity along the first direction and encloses a reflective opening with the inner wall of the inner cavity. The reflective opening faces the key, and the key opening gradually decreases along the first direction. A plurality of sound absorbing holes are provided on the inner wall of the inner cavity and connected to the reflection cavity, and are used to absorb sound waves when the sound waves are reflected by the first reflection cavity and enter the sound absorbing holes.

2. A key cover according to claim 1, characterized in that: The sound absorbing hole comprises a first inclined portion and a second inclined portion which are interconnected; The first inclined portion is inclined outwardly from the inner wall of the inner cavity along the first direction, and the opening of the second inclined portion is away from the first inclined portion and close to the outer surface of the side wall of the main body. The angle between the central axis of the first inclined portion and the central axis of the second inclined portion is defined as a, 60°≤a≤120°, and the side wall of the main body blocks the end of the second inclined portion away from the first inclined portion.

3. A key cover according to claim 2, characterized in that: The sleeve portion is recessed along the first direction to form an inclined surface, the inclined surface is arranged in the first reflection cavity and surrounds the sleeve portion, and the central axis of the first inclined portion is perpendicular to the inclined surface.

4. A key cover according to claim 2, characterized in that: The key silicone cover also includes a sound absorbing block, which is filled in the sound absorbing hole, and the angle between the central axis of the first inclined portion and the horizontal plane of the bottom of the first reflection cavity is 45°.

5. A key cover according to claim 1, characterized in that: The key silicone cover also includes a sound absorbing member, and the inner wall extends inwardly to form the sound absorbing member; The pressing portion and the first reflecting layer are combined to form a second reflecting cavity. The sound absorbing member is arranged in an annular shape on the inner wall of the second reflecting cavity. A plurality of the sound absorbing members are arranged in an array along a vertical direction.

6. A key cover according to claim 5, characterized in that: The sound absorbing member further comprises an arc surface portion, which is arranged away from the inner wall of the body, and a sound waveguide groove is formed between two adjacent arc surface portions for absorbing low-frequency sound waves.

7. A key cover according to claim 1, characterized in that: The key silicone cover comprises a second reflective layer, the second reflective layer is arranged on the inner wall of the inner cavity, a third reflective cavity is formed between the pressing portion and the second reflective layer, and the first reflective cavity, the second reflective cavity and the third reflective cavity are arranged in sequence along the vertical direction; The second reflective layer further includes a first isolation layer, a second isolation layer and an elastic layer, wherein the elastic layer is disposed between the first isolation layer and the second isolation layer.

8. A key cover according to claim 7, characterized in that: The thickness of the pressing portion in the first direction is defined as b, 0.5 mm ≤ b ≤ 1 mm; The pressing portion is provided with grooves, the grooves are arranged in a honeycomb shape, and a plurality of the grooves are evenly arranged on a side of the pressing portion away from the contact end.

9. A key cover according to claim 1, characterized in that: The key silicone sleeve further includes a support layer, and the support layer is arranged in the inner cavity; One end of the support layer is arranged on the pressing part, and the other end is fixedly connected to the sleeve part, and the support layer is located at the geometric center of the key silicone sleeve.

10. A key cover according to claim 9, characterized in that: The button silicone sleeve also includes a pressure equalizing layer, which is arranged in the inner cavity and fits the sleeve portion, and one end of the support layer away from the pressing portion is fixedly connected to the pressure equalizing layer.

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