Stable mechanical shaft key structure
By using a U-shaped spring and a three-layer folded conductive pin design, the stability and reliability issues of mechanical button structures are solved, resulting in optimized button stability and feel, and improved user experience.
Patent Information
- Application Number
- CN202423185328.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing mechanical button structures suffer from insufficient stability and reliability. In particular, the metal switch spring structure is prone to tilting and imbalance, resulting in an unpleasant feel and a risk of breakage. Furthermore, existing improved structures are complex and costly.
The design employs a U-shaped moving spring, combined with a three-layer folded conductive pin and a limiting groove structure to ensure a stable connection between the moving spring and the fixed plate. It also increases the support of the elastic arm and provides stability and feedback through an arc-shaped platform and a tactile torsion spring. The conductive pin has a three-layer folded structure to enhance strength.
It improves the stability and balance of the buttons, optimizes the pressing feel, ensures the reliability of conductivity, enhances the durability of the overall structure, and provides a better user experience.
Smart Images
Figure CN223582857U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a key, concretely relates to a stable mechanical shaft key structure. BACKGROUND
[0002] In electronic devices, mechanical keys are important interfaces for users to interact with the devices, and their stability and reliability are crucial for user experience. Currently, most metal switch reed on the market adopts a structure in which the middle is pressed, and the two sides are connected by contact points. However, this structure causes tilting imbalance when pressed, resulting in an uncomfortable feel. In addition, the pins of the metal switch reed are folded by 180 degrees in a double-layer manner, which may cause cracking risk.
[0003] To solve these problems, various improved mechanical key structures have appeared on the market. However, these structures are often complex in structure, high in manufacturing cost, and still cannot fully meet the requirements of users for key stability and reliability in some specific application environments. SUMMARY
[0004] To solve the above problems, the utility model aims to provide a mechanical shaft key structure which is simple in structure, low in manufacturing cost, and high in key stability and reliability.
[0005] To achieve this technical purpose, the utility model provides a stable mechanical shaft key structure, which comprises a base, a press shaft, and a return spring installed between the base and the press shaft. The press shaft is fixed with a metal switch reed assembly on the side surface. The metal switch reed assembly comprises a moving reed and a fixed reed. The moving reed and the fixed reed are connected by a metal contact. Both the moving reed and the fixed reed are fixed inside the base, and the bottom of both is passed through the base to form a conductive pin connected with an external circuit. The conductive pin is a three-layer folded structure. The moving reed adopts a U-shaped structure design. The moving reed extends an elastic arm. When the press shaft is pressed, the elastic arm is extruded by the press shaft, so that the moving reed and the fixed reed are separated to trigger a mechanical switch signal.
[0006] Preferably, the base is provided with a first limiting groove, a second limiting groove, and a limiting block. One end of the U-shaped structure is limited in the first limiting groove, and the other end extends an arc-shaped platform abutting on the limiting block. The fixed reed is limited in the second limiting groove.
[0007] Preferably, the side surface of the press shaft is provided with a trigger block. The trigger block is used to extrude the elastic arm when the press shaft is pressed.
[0008] Preferably, the elastic arm extends upward from the bottom of the moving reed and is provided with an arc-shaped protrusion on the side facing the press shaft.
[0009] As preferred, the base is provided with a containing groove provided with a hand feeling torsional spring, the containing groove is further provided with a stopper, the hand feeling torsional spring extends a force arm to abut against the stopper, and the side of the press shaft is provided with a pressing block capable of pressing the force arm downward.
[0010] As preferred, the base is provided with a containing groove provided with a hand feeling torsional spring, the containing groove is further provided with a stopper, the hand feeling torsional spring extends a force arm to abut against the stopper, and the side of the press shaft is provided with a pressing block capable of pressing the force arm downward.
[0011] As preferred, the base is provided with a containing groove provided with a hand feeling torsional spring, the containing groove is further provided with a stopper, the hand feeling torsional spring extends a force arm to abut against the stopper, and the side of the press shaft is provided with a pressing block capable of pressing the force arm downward.
[0012] The metal switch elastic sheet assembly of the utility model has the beneficial effects that: the elastic arm and the arc-shaped platform structure of the metal switch elastic sheet assembly are carefully designed, the stability and balance of the key are improved, the pressing feeling is optimized, the reliability of the conductive performance is ensured, the durability of the overall structure is enhanced, and better use experience is provided for the user. 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 schematic view of the internal structure of the utility model;
[0017] Figure 5 It is a schematic view of the internal structure of the utility model;
[0018] Figure 6 It is a structural schematic view of the base in the utility model;
[0019] Figure 7 It is a structural schematic view of the metal switch elastic sheet assembly and the conductive socket in the utility model;
[0020] Figure 8 It is a structural schematic view of the dynamic elastic sheet and the fixed sheet in the utility model;
[0021] Figure 9 It is a structural schematic view of the dynamic elastic sheet in the utility model.
[0022] In the figure: 1, upper cover; 2, press shaft; 21, trigger block; 22, press block; 3, reset spring; 4, hand feeling torsional spring; 5, metal switch leaf spring assembly; 51, moving leaf spring; 511, elastic arm; 512, arc platform; 52, fixed leaf spring; 53, conductive pin; 54, metal contact; 6, base; 61, first limiting groove; 62, second limiting groove; 63, limiting block; 64, accommodating groove; 65, stop block; 7, bottom plate; 8, conductive socket. DETAILED DESCRIPTION
[0023] The utility model will be made further detailed explanation in combination with the drawings and specific embodiment. In order to clearly and completely describe technical scheme, therefore selects the following embodiment to explain, the following embodiment is a part of embodiment of the utility model, based on the present application, the other embodiment obtained under the premise of not making creative labor, all belong to the scope of the utility model protection.
[0024] In the following examples, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of clearly describing the embodiment, and not indicate or imply that the device or element must have a particular orientation, therefore can not be understood as a limitation on the present application. At the same time, "first", "second" in the embodiment are only used for distinguishing description purposes, and not represent the relative importance.
[0025] The following will be combined with the drawings Figures 1-9 The specific embodiment of the utility model is described in detail:
[0026] Example 1:
[0027] The stable mechanical key structure includes a base 6, a press shaft 2, and a reset spring 3 installed between the base 6 and the press shaft 2. The press shaft 2 has a metal switch leaf spring assembly 5 fixed on the side surface, which includes a moving leaf spring 51 and a fixed leaf spring 52. The moving leaf spring 51 and the fixed leaf spring 52 are connected by a metal contact 54, and both are fixed inside the base 6, with their bottoms exposed and passing through the base 6 to form a conductive pin 53 connected to the external circuit. The moving leaf spring 51 extends an elastic arm 511, which can reversibly deform when the press shaft 2 is pressed, thereby separating the moving leaf spring 51 from the fixed leaf spring 52 to trigger the mechanical switch signal. The elastic arm 511 plays a role in balancing the stability of the moving leaf spring 51.
[0028] The dynamic elastic sheet 51 adopts a U-shaped structure design, which not only enhances the structural strength of the dynamic elastic sheet 51, but also enables the dynamic elastic sheet 51 to be more stably deformed during the pressing process. The base 6 is provided with a first limiting groove 61, a second limiting groove 62 and a limiting block 63. One end of the U-shaped structure is limited in the first limiting groove 61, and the other end extends an arc-shaped platform 512 abutting on the limiting block 63. The fixed sheet 52 is limited in the second limiting groove 62. The fixing mode of the dynamic elastic sheet 51 and the fixed sheet 52 ensures that they will not be displaced or loose during the pressing process, effectively avoiding the problem of unstable electrical connection caused by looseness or wear, especially the arc-shaped platform 512 is added, and if the bottom of the metal elastic sheet of the existing key has no support, the key is easy to sink during pressing, resulting in instability and poor hand feeling. The arc-shaped platform 512 abuts on the limiting block 63, providing certain buffer and support, so that the pressing is more stable, and the metal contact 54 is also more stable.
[0029] The conductive pin 53 is designed in a three-layer folding structure, which increases the structural strength of the pin and the reliability of the electrical connection.
[0030] The side of the pressing shaft 2 is provided with a trigger block 21 for extruding the elastic arm 511 when the pressing shaft 2 is pressed.
[0031] The elastic arm 511 extends upward from the bottom of the dynamic elastic sheet 51 and is provided with an arc-shaped protrusion on the side facing the pressing shaft 2, which increases the contact area with the trigger block 21 and improves the stability and reliability of the trigger signal.
[0032] The base 6 is provided with a containing groove 64 in which a hand feeling torsional spring 4 is arranged, and the containing groove 64 is further provided with a stop block 65. The hand feeling torsional spring 4 extends a force arm abutting under the stop block 65, and the side of the pressing shaft 2 is provided with a pressing block 22 capable of extruding the force arm downward. The hand feeling torsional spring 4 refers to a torsional spring member for providing feedback hand feeling when pressing the pressing shaft 2. Through the force arm of the hand feeling torsional spring 4 abutting under the stop block 65, the hand feeling feedback of the key pressing is realized, and the user's use experience is improved.
[0033] Embodiment 2:
[0034] On the basis of the embodiment, the stable mechanical key structure of the application further comprises a bottom plate 7 and a conductive socket 8. The bottom plate 7 is installed below the base 6, and the conductive socket 8 matched with the conductive pin is installed on the bottom plate 7. The top of the conductive socket 8 is a socket part corresponding to the conductive pin, and the bottom is a socket part protruding below the PCB. The bottom plate 7 is provided with a through hole for fixing the socket part.
[0035] Embodiment 3:
[0036] On the basis of the embodiment or the embodiment, the stable mechanical key structure further comprises an upper cover 1. The top of the shaft 2 passes through the upper cover 1 and is limited in the upper cover 1 by a limiting structure. The upper cover 1 is buckled on the base 6, and the internal components of the key structure are protected.
[0037] The above is only the preferred embodiment of the present application, and is not used to limit the present application. Any slight modification, equivalent replacement and improvement of the above embodiment according to the technical essence of the present application shall be included in the protection scope of the technical scheme of the present application.
Claims
1. A stable mechanical shaft key structure comprising a base, a key shaft, and a return spring mounted between the base and the key shaft, characterized in that: The metal switch spring assembly is fixed on the side of the shaft, and includes a movable spring and a fixed spring. The movable spring and the fixed spring are connected through a metal contact. The movable spring and the fixed spring are fixed in the base, and the bottom of the two passes through the base to form a conductive pin connected with the external circuit. The conductive pin is a three-layer folding structure. The movable spring adopts a U-shaped structure design. The movable spring extends an elastic arm. When the shaft is pressed, the elastic arm is extruded by the shaft, so that the movable spring and the fixed spring are separated to trigger the mechanical switch signal.
2. The stable mechanical shaft key structure of claim 1, wherein: The base is provided with a first limiting groove, a second limiting groove and a limiting block. One end of the U-shaped structure is limited in the first limiting groove, and the other end extends a bottom arc-shaped platform abutting on the limiting block. The fixed spring is limited in the second limiting groove.
3. The stable mechanical shaft key structure of claim 2, wherein: The side of the shaft is provided with a trigger block for extruding the elastic arm when the shaft is pressed.
4. The stable mechanical shaft key structure of claim 2, wherein: The elastic arm extends upward from the bottom of the movable spring, and is provided with an arc-shaped protrusion on the side facing the shaft.
5. The stable mechanical shaft key structure of claim 2, wherein: The base is provided with a containing groove provided with a hand feeling torsional spring. The containing groove is further provided with a stop block. The hand feeling torsional spring extends a force arm abutting under the stop block. The side of the shaft is provided with a pressing block capable of extruding the force arm downward.
6. A stable mechanical shaft key structure according to any one of claims 1-5, characterized in that: The base is provided with a containing groove provided with a hand feeling torsional spring. The containing groove is further provided with a stop block. The hand feeling torsional spring extends a force arm abutting under the stop block. The side of the shaft is provided with a pressing block capable of extruding the force arm downward.
7. The stable mechanical shaft key structure according to any one of claims 1-5, wherein: The base is provided with a containing groove provided with a hand feeling torsional spring. The containing groove is further provided with a stop block. The hand feeling torsional spring extends a force arm abutting under the stop block. The side of the shaft is provided with a pressing block capable of extruding the force arm downward. The base is provided with a containing groove provided with a hand feeling torsional spring. The containing groove is further provided with a stop block. The hand feeling torsional spring extends a force arm abutting under the stop block. The side of the shaft is provided with a pressing block capable of extruding the force arm downward.