Guiding stable key switch structure

Abstract

The utility model discloses a stable guide key switch structure, which comprises a base and a switch shaft capable of moving up and down in the base, the center of the bottom of the switch shaft extends downwards to be provided with a main guide column, a guide table extending upwards is arranged in the base, and a guide cavity matched with the main guide column is formed in the guide table; the guide table is sleeved with a reset spring, and the two ends of the reset spring abut against the base and the switch shaft respectively. The left side wall and the right side wall of the switch shaft extend downwards to be provided with guide grooves, two auxiliary guide columns matched with the two guide grooves extend upwards in the base, the two auxiliary guide columns are arranged on the two sides of the guide table respectively, and when the switch shaft is pressed, the auxiliary guide columns are matched with the inner walls of the guide grooves to limit transverse swing of the switch shaft. According to the switch structure, through cooperative work of the main guide column and the auxiliary guide column, traditional single-point guide is upgraded to three-point positioning, transverse swing of the key is effectively inhibited, and pressing stability is improved; the design of double positioning grooves of the reset spring prevents offset failure, the whole structure is compact and durable, the service life is remarkably prolonged, and the operation reliability is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electronic equipment key, concretely relates to a guide stable key switch structure. BACKGROUND

[0002] In the traditional key switch structure, the switch shaft is prone to horizontal swing due to uneven force or reset spring deviation during pressing, which leads to unstable key stroke, rough hand feeling and even affects the reliability of internal contact.

[0003] In the prior art, although up-down guidance is realized through the cooperation of the main guide column and the guide cavity, the single-point guide structure is insufficient to limit horizontal swing, especially prone to wear or jamming under frequent pressing. In addition, the installation stability of the reset spring is insufficient, which is prone to deviation or distortion, further aggravating the shaking of the key. Therefore, there is an urgent need for a key switch structure that can effectively suppress horizontal swing and improve pressing stability and reset accuracy. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model aims to provide a guide stable key switch structure.

[0005] To achieve this technical purpose, the utility model provides a guide stable key switch structure, which comprises a base and a switch shaft capable of moving up and down in the base, the bottom center of the switch shaft is provided with a main guide column extending downward, the base is provided with a guide table extending upward, and a guide cavity matched with the main guide column is formed in the guide table; a reset spring is sleeved outside the guide table, and the two ends of the reset spring are respectively abutted against the base and the switch shaft; the left and right side walls of the switch shaft are both provided with a guide groove extending downward, and the base is provided with two auxiliary guide columns extending upward and matched with the two guide grooves, the two auxiliary guide columns are arranged on the two sides of the guide table, and when the switch shaft is pressed, the auxiliary guide columns are matched with the inner walls of the guide grooves to limit the horizontal swing of the switch shaft.

[0006] Preferably, a key shell for limiting the upward movement of the switch shaft is arranged on the base, and the key shell is buckled on the base.

[0007] Preferably, the guide groove is a cylindrical groove, and the auxiliary guide column is a cylindrical structure matched with the guide groove.

[0008] Preferably, the guide grooves are symmetrically embedded in the opposite two side walls of the switch shaft, and the key shell is provided with an arc-shaped groove matched with the outer part of the guide groove.

[0009] Preferably, a step part is arranged in the guide table extending upward, and the main guide column is abutted against the step part when the switch shaft is pressed by external force to the bottom.

[0010] As preferred, the base is internally provided with a first spring groove for stabilizing the return spring, the first spring groove is arranged around the guide table, the bottom of the switch shaft is provided with a second spring groove for stabilizing the return spring, and the second spring groove is arranged around the main guide column.

[0011] As preferred, one side wall of the switch shaft is provided with an abutting piece, the base is internally provided with a metal reed switch, and when the switch shaft is pressed, the abutting piece extrudes the metal reed switch to trigger signal output.

[0012] The switch structure of the utility model has the advantages that through the cooperative work of the main guide column and the auxiliary guide column, the traditional single-point guidance is upgraded to three-point positioning, the horizontal swing of the key is effectively inhibited, the pressing stability is improved, the double-positioning groove design of the return spring prevents deviation and failure, the overall structure is compact and durable, the service life and operation reliability are significantly prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is an explosion view of the utility model;

[0015] Figure 3 It is a sectional view of the utility model;

[0016] Figure 4 It is a structural schematic view of the base in the utility model;

[0017] Figure 5 It is a structural schematic view of the key shell in the utility model;

[0018] Figure 6 It is a structural schematic view of the switch shaft in the utility model.

[0019] In the drawing: 1, base; 11, first spring groove; 2, switch shaft; 21, second spring groove; 22, abutting piece; 3, main guide column; 4, guide table; 41, guide cavity; 42, step part; 5, return spring; 6, guide groove; 7, auxiliary guide column; 8, key shell; 81, arc-shaped groove; 9, metal reed switch. DETAILED DESCRIPTION

[0020] The utility model will be further explained in detail in combination with the drawings and specific embodiments. In order to clearly and completely describe the technical scheme, the following embodiments are selected for description; the following embodiments are a part of the embodiments of the utility model; based on the application, other embodiments obtained without making creative labor also belong to the protection scope of the utility model.

[0021] 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.

[0022] like Figures 1-6 As shown, a specific embodiment of this utility model is a guided and stable push-button switch structure. This guided and stable push-button switch mainly includes a base 1, a key shell 8, a switch shaft 2, a return spring 5, a guide platform 4, and auxiliary guide components. The base 1 is injection molded from insulating plastic, forming a hollow cavity inside. The switch shaft 2 has a cylindrical structure, with a downward-extending main guide post 3 at the bottom center. The main guide post 3 and the guide platform 4 inside the base 1 form a main guide axial fit through the guide cavity 41, ensuring that the main guide post 3 slides axially within the guide cavity 41.

[0023] Cylindrical guide grooves 6 are machined on both sides of the switch shaft 2. Two auxiliary guide posts 7 are respectively provided on both sides of the guide platform 4 inside the base 1. The auxiliary guide posts 7 are cylindrical and correspond to the guide grooves 6. When the switch shaft 2 is pressed, the auxiliary guide posts 7 always form a two-point limit with the guide grooves 6, eliminating lateral displacement and ensuring the reliability of the trigger signal.

[0024] The reset spring 5 is sleeved on the outside of the guide plate 4, with its upper and lower ends respectively embedded in the first spring groove 11 of the base 1 and the second spring groove 21 of the switch shaft 2. Both grooves are annular structures to ensure that the spring pressure is evenly distributed and to prevent the spring from radially shifting.

[0025] The key housing 8 is fixed to the top of the base 1 by a snap-fit ​​structure, restricting the upward movement of the switch shaft 2. Its inner surface is provided with an arc-shaped groove 81 that matches the outer contour of the guide groove 6 of the switch shaft 2. When the switch shaft 2 moves downward, the main guide post 3 is in the guide cavity 41 of the guide platform 4, and the outer edge of the guide groove 6 matches the arc-shaped groove 81 of the key housing 8. Together with the action of the two auxiliary guide posts 7, a stable limiting structure is formed.

[0026] The guide plate 4 has a step 42 inside. When the switch shaft 2 is pressed to the lowest point, the end face of the main guide post 3 contacts the step 42. The main guide post 3 defines the downward endpoint and can prevent the guide groove 6 from hitting the inside of the base 1.

[0027] In this design, the side wall of the switch shaft 2 is provided with a protruding abutment 22, and a metal spring switch 9 is installed in the corresponding position inside the base 1. When the abutment 22 is pressed down, the spring in the metal spring switch 9 undergoes elastic deformation, and the contacts on the two springs make contact to output an electrical signal through the electrical pin.

[0028] The guiding and stabilizing key switch structure is not only suitable for mechanical switch keys, but also can be applied to the field of photoelectric switch or electromagnetic switch, and has wide adaptability.

[0029] When the structure is applied to a photoelectric key, the key comprises a photoelectric switch assembly composed of a light pair tube formed by combination of a light emitting element and a light receiving element, and a trigger part is arranged on the switch shaft. When the key is pressed, the trigger part can block or allow light to pass, trigger the light receiving element and generate a corresponding electrical signal.

[0030] When the structure is applied to an electromagnetic key, a magnetic element is arranged on the main guide column, and a Hall sensor is arranged. When the key is pressed, the magnetic field between the magnetic element and the Hall sensor changes, the Hall sensor detects the action of the key accordingly, and generates a corresponding electrical signal.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any slight modification, equivalent replacement and improvement made according to the technical essence of the present application to the above embodiment shall be included in the protection scope of the technical scheme of the present application.

Claims

1. A guide-stabilized push-button switch structure, comprising a base (1) and a switch shaft (2) capable of moving up and down within the base (1), wherein a guide post (3) extends downward from the center of the bottom of the switch shaft (2), and an upwardly extending guide platform (4) is provided within the base (1), wherein a guide cavity (41) cooperating with the guide post (3) is provided within the guide platform (4); a return spring (5) is sleeved on the outer side of the guide platform (4), and the two ends of the return spring (5) abut against the base (1) and the switch shaft (2) respectively; characterized in that: Both left and right side walls of the switch shaft (2) are provided with guiding grooves (6) extending downward, the base (1) is provided with two auxiliary guide columns (7) extending upward and matched with the two guiding grooves (6), the two auxiliary guide columns (7) are arranged on the two sides of the guiding table (4), when the switch shaft (2) is pressed, the auxiliary guide column (7) is matched with the inner wall of the guiding groove (6) to limit the lateral swing of the switch shaft (2).

2. The key guiding and stabilizing switch structure according to claim 1, wherein: The base (1) is provided with a key shell (8) for limiting the upward movement of the switch shaft (2), and the key shell (8) is buckled on the base (1).

3. The key switch structure according to claim 2, wherein: The guiding groove (6) is a cylindrical groove, and the auxiliary guide column (7) is a cylindrical structure matched with the guiding groove (6).

4. The key guide stabilizing switch structure according to claim 3, wherein: The guiding groove (6) is symmetrically embedded in the opposite two side walls of the switch shaft (2), and the key shell (8) is provided with an arc-shaped groove (81) matched with the outer part of the guiding groove (6).

5. The key guide stabilizing switch structure according to claim 4, wherein: The guiding table (4) is provided with a step portion (42) extending upward, when the switch shaft (2) is pressed to the bottom by external force, the main guide column (3) is in abutment with the step portion (42).

6. The key guide stabilizing switch structure according to claim 4, wherein: The base (1) is provided with a first spring groove (11) for stabilizing the return spring (5), the first spring groove (11) is arranged around the guiding table (4), the bottom of the switch shaft (2) is provided with a second spring groove (21) for stabilizing the return spring (5), and the second spring groove (21) is arranged around the main guide column (3).

7. The key guide stabilizing switch structure according to any one of claims 1 to 6, characterized by: One side wall of the switch shaft (2) is provided with an abutting piece (22), the base (1) is provided with a metal spring switch (9), when the switch shaft (2) is pressed, the abutting piece (22) extrudes the metal spring switch (9) to trigger the signal output.

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