Dustproof key

Abstract

The utility model discloses a dustproof key, including the key shell of being located on the base and the press shaft of being set up in the key shell center and can go up and down, the upper surface of key shell is equipped with the opening of the press shaft transmission, the upper surface of key shell is in the peripheral area of the opening and is formed in a ring around dustproof wall that protrudes upwards, and the dustproof wall is around the four around press shaft and forms the clearance of press shaft up and down movement with the outer wall of press shaft. Can effectively block most dust from lateral and side upper dust directly into the key internal gap, has guaranteed the stability of key action and the consistency of hand feeling, has avoided the abnormal sound and abrasion of producing because of the wobble, the dustproof structure is directly integrated with the key shell, need not to increase the additional part, has simplified the assembly process, has reduced the production cost, has improved the reliability of structure simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of buttons, specifically to a dustproof button. Background Technology

[0002] Buttons are indispensable input components in various electronic devices (such as keyboards, remote controls, control panels, etc.). Common buttons typically consist of a key shell, a switch, and an underlying trigger mechanism (such as a silicone spring or mechanical switch). The switch moves up and down within an opening in the key shell to trigger the button.

[0003] In actual use, dust, liquids, and other contaminants in the environment can easily enter the key through the gap between the key switch and the key case opening. The accumulation of these contaminants can cause the key switch to move poorly, become stuck, or even corrode the internal trigger mechanism, severely affecting the key's lifespan and reliability.

[0004] To address the aforementioned issues, existing technologies have proposed several dustproof solutions, such as incorporating sealing rings inside the buttons. However, these solutions often involve complex structures, increasing assembly difficulty and cost, or negatively impacting the button's tactile feel. Therefore, there is an urgent need for an improved button structure that is simple in structure, provides good dustproof performance, and does not affect the button's tactile feel. Utility Model Content

[0005] To address the aforementioned problems, this utility model aims to provide a button with a simple structure and significant dustproof effect.

[0006] To achieve this technical objective, the present invention provides a dustproof button, comprising a key shell located on a base and a key shaft movably disposed at the center of the key shell. The upper surface of the key shell has an opening for the key shaft to pass through. The upper surface of the key shell protrudes upward in the periphery of the opening to form a surrounding dustproof wall. The dustproof wall surrounds the key shaft and forms a gap with the outer peripheral wall of the key shaft to allow the key shaft to move up and down.

[0007] Preferably, the dustproof wall has a plurality of arc-shaped protrusions on its inner side facing the push shaft, and the arc-shaped protrusions are distributed at intervals along the circumference of the dustproof wall to limit the movement of the push shaft in the radial direction.

[0008] Preferably, the top of the dustproof wall forms a wedge-shaped guide surface that slopes outward and downward from the upper surface, and the inner edge of the wedge-shaped guide surface is higher than its outer edge.

[0009] Preferably, the dustproof wall and the key shell are integrally injection molded structures.

[0010] Preferably, a main guide post extends downward from the center of the bottom of the push shaft, and an upward-extending guide platform is provided inside the base, with a guide cavity inside the guide platform that cooperates with the main guide post; a return spring is sleeved on the outside of the guide platform, with both ends of the return spring abutting against the base and the push shaft respectively.

[0011] Preferably, the left and right side walls of the push shaft are provided with guide grooves extending downwards, and the base has two auxiliary guide posts extending upwards to cooperate with the two guide grooves. The two auxiliary guide posts are respectively arranged on both sides of the guide platform. When the push shaft is pressed, the auxiliary guide posts cooperate with the inner wall of the guide groove to limit the lateral swing of the push shaft.

[0012] Preferably, the guide groove is a cylindrical groove, and the auxiliary guide post is a cylindrical structure that matches the guide groove.

[0013] Preferably, the guide groove is symmetrically embedded on the opposite side walls of the key shaft, and the key housing is provided with an arc-shaped groove that matches the outside of the guide groove.

[0014] The beneficial effects of this utility model are as follows: the dustproof wall surrounding the key shaft effectively blocks most of the dust coming from the side and above from directly entering the gaps inside the key; the multiple arc-shaped protrusions on the inner side of the dustproof wall limit the movement of the key shaft in the radial direction without contacting it, effectively preventing excessive shaking or tilting of the key shaft during pressing, ensuring the stability of the key action and the consistency of the feel, and avoiding abnormal noise and wear caused by shaking; this dustproof structure is directly integrally formed with the key shell, eliminating the need for additional parts, simplifying the assembly process, reducing production costs, and improving the overall integrity and reliability of the structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a schematic diagram of the key shell structure in this utility model;

[0018] Figure 4 This is a cross-sectional view of the present invention;

[0019] Figure 5 for Figure 4 A magnified view of part A in the image.

[0020] In the figure: 1-key shell, 2-button shaft, 3-dustproof wall, 4-gap, 5-arc-shaped protrusion, 6-wedge-shaped guide surface, 7-base, 8-main guide post; 9-guide platform; 10-guide cavity; 11-reset spring; 12-guide groove, 13-auxiliary guide post. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] like Figure 1-5 As shown, the specific embodiment of this utility model is a dustproof button provided by this utility model, mainly including a key shell 1 and a push-button 2. The key shell 1 is fixed on the base 7, and the push-button 2 is movably inserted into the opening in the center of the key shell 1.

[0024] The core improvement of this invention lies in the dustproof structure on the upper surface of the key shell 1. Specifically, a ring-shaped dustproof wall 3 protrudes upwards around the periphery of the opening on the upper surface of the key shell 1. This dustproof wall 3 surrounds the button shaft 2 and maintains a small gap 4 between it and the outer peripheral wall of the button shaft 2. This gap 4 ensures that the button shaft 2 can move up and down without obstruction.

[0025] On the inner sidewall of the dustproof wall 3 facing the shaft 2, multiple inwardly protruding arc-shaped protrusions 5 are integrally formed. These arc-shaped protrusions 5 are evenly distributed along the circumference of the dustproof wall 3. Figure 5 As shown in the enlarged view, the protruding end of the arc-shaped protrusion 5 maintains a small distance from the outer peripheral wall of the push shaft 2, and the two do not contact each other. This non-contact design allows the arc-shaped protrusion 5 to constrain the swing amplitude of the push shaft 2 in the radial direction, effectively limiting the movement and preventing the push shaft 2 from shaking, while not affecting the smoothness of its vertical movement at all.

[0026] Furthermore, the top of the dustproof wall 3 is designed as a wedge-shaped guide surface 6. This guide surface 6 slopes downward from the inner edge (the side closer to the shaft 2) to the outer edge (the side farther from the shaft 2), meaning the inner edge is higher than the outer edge. This sloping design allows dust particles falling from above or to the side to be effectively guided outward and slide off, rather than accumulating at the edge of the gap 4, thus significantly improving the dustproof effect.

[0027] As a preferred manufacturing solution, the entire key shell 1, together with its dustproof wall 3, arc-shaped protrusion 5 and wedge-shaped guide surface 6, is integrally molded by injection molding, which ensures the strength and consistency of the structure and has excellent production economy.

[0028] To further enhance the stability of the dustproof button, the base is injection molded from insulating plastic, forming a hollow cavity inside. The button shaft 2 has a cylindrical structure, with the bottom 7 extending downwards from the center to form a main guide post 8. The main guide post and the guide platform 9 inside the base 7 form a main guide engagement through the guide cavity 10, ensuring that the main guide post slides axially within the guide cavity. A return spring 11 is sleeved on the outside of the guide platform 9, with its two ends abutting against the base 7 and the button shaft 2, respectively.

[0029] Cylindrical guide grooves 12 are machined on both sides of the push shaft 2. Two auxiliary guide posts 13 are respectively provided on both sides of the guide platform inside the base 7. The auxiliary guide posts 13 are cylindrical and correspond to the guide grooves 12. When the push shaft 2 is pressed, the auxiliary guide posts always form a two-point limit with the guide grooves, eliminating lateral displacement and ensuring the reliability of the trigger signal.

[0030] The inner surface of the key shell 1 is provided with an arc-shaped groove that matches the outer contour of the guide groove of the key shaft 2. When the key shaft moves down, the main guide post is in the guide cavity of the guide platform, and the outer edge of the guide groove matches the arc-shaped groove of the key shell. Together with the action of the two auxiliary guide posts, a stable limiting structure is formed.

[0031] The working principle of this utility model is as follows: When the key shaft 2 is pressed, the key shaft 2 moves vertically downward within the space defined by the gap 4, triggering a signal. The dustproof wall 3 acts as the main barrier, blocking external dust. Due to the dustproof wall 3, the side wall of the key shell 1 is raised, making it easy for the key shaft 2 to get stuck with the dustproof wall 3 during pressing. Slight tilting can easily cause jamming and uneven pressing. Therefore, this application also adds an arc-shaped protrusion 5 to the inner wall. The arc-shaped protrusion 5 avoids direct contact between the key shaft 2 and the dustproof wall 3, and at the same time, it can limit the radial wobbling of the key shaft 2, ensuring smooth operation. The wedge-shaped guide surface 6 guides any contaminants that may fall on it away. Throughout the process, the dustproof function and the mechanical function of the key do not interfere with each other and work together to achieve a balance between efficient dustproofing and stable operation.

[0032] 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 dustproof key, comprising a key shell located on a base and a key shaft movably disposed at the center of the key shell, wherein the upper surface of the key shell has an opening for the key shaft to pass through, characterized in that: The upper surface of the key shell protrudes upward at the periphery of the opening to form a surrounding dustproof wall. This dustproof wall surrounds the button shaft and forms a gap with the outer peripheral wall of the button shaft to allow the button shaft to move up and down.

2. The dustproof button according to claim 1, characterized in that: The dustproof wall has a plurality of arc-shaped protrusions on its inner side facing the push shaft. The arc-shaped protrusions are distributed at intervals along the circumference of the dustproof wall to limit the radial movement of the push shaft.

3. The dustproof button according to claim 2, characterized in that: The top of the dustproof wall forms a wedge-shaped flow guide surface that slopes outward and downward from the upper surface, with the inner edge of the wedge-shaped flow guide surface being higher than its outer edge.

4. The dustproof button according to any one of claims 1-3, characterized in that: The dustproof wall and the key shell are integrally injection molded structures.

5. The dustproof button according to claim 4, characterized in that: The bottom center of the push shaft has a downward-extending main column, and the base has an upward-extending guide platform with a guide cavity that cooperates with the main column. A return spring is sleeved on the outside of the guide platform, and the two ends of the return spring abut against the base and the push shaft, respectively.

6. The dustproof button according to claim 5, characterized in that: The left and right side walls of the push shaft are provided with guide grooves extending downwards. The base has two auxiliary guide posts extending upwards to cooperate with the two guide grooves. The two auxiliary guide posts are respectively arranged on both sides of the guide platform. When the push shaft is pressed, the auxiliary guide posts cooperate with the inner wall of the guide groove to limit the lateral swing of the push shaft.

7. The dustproof button according to claim 6, characterized in that: The guide groove is a cylindrical groove, and the auxiliary guide post is a cylindrical structure that matches the guide groove.

8. The dustproof button according to claim 7, characterized in that: The guide grooves are symmetrically embedded on the opposite side walls of the key shaft, and the key housing is provided with an arc-shaped groove that matches the outside of the guide grooves.

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