An axisymmetric scissors leg structure

Abstract

The utility model discloses a kind of symmetrical scissors leg structures, including outer scissors leg and inner scissors leg, the outer scissors leg inner wall center is equipped with shaft hole, pivot is equipped on the outer scissors leg with the pivot joint of the shaft hole, the outer scissors leg with the inner scissors leg is crossed rotation when being stressed with the pivot as center, the opposite end of the outer scissors leg with the inner scissors leg is symmetrically arranged with the pivot as central axis, the both ends of the outer scissors leg with the inner scissors leg are crossed rotation along same central circular trajectory.The design scheme presented by the utility model, by axial symmetry design, makes inner and outer scissors leg rotate along same central circular trajectory, avoids structural inclination in rotation process, improves the uniformity and consistency of key feeling, and can be widely applied to keyboard key of different height stroke.

Description

Technical Field

[0001] This utility model belongs to the field of push button switch technology, specifically an axisymmetric scissor-type structure. Background Technology

[0002] To ensure even pressure distribution on keys, scissor-switch mechanisms are often used, such as in laptop or desktop computer keys. These mechanisms operate through two sets of parallel four-bar linkages (i.e., X-shaped supports), forcing the key to move. This allows users to experience a smooth and consistent tactile feedback regardless of where they press the keycap.

[0003] In traditional scissor-type structures, the displacement circles formed by the rotation of each axis of the outer shear and the displacement circles formed by the rotation of each axis do not coincide. Typically, the displacement circle of the inner shear is smaller than that of the outer shear. During the rotation of the scissor, the difference in position of the inner and outer shear axes on the Z-axis causes the structure to tilt. In severe cases, this can lead to a very poor feel, thus limiting the usable stroke of the scissor to a certain extent, which fails to meet the growing user needs. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide an axisymmetric scissor-leg structure.

[0005] The technical solution adopted by this utility model is as follows: an axisymmetric scissor leg structure, including an outer scissor leg and an inner scissor leg. The outer scissor leg has a shaft hole at the center of its inner wall. The outer scissor leg is provided with a pivot that is pivotally connected to the shaft hole. When the outer scissor leg and the inner scissor leg are subjected to force, they rotate intersectingly around the pivot. The opposite ends of the outer scissor leg and the inner scissor leg are symmetrically arranged with the pivot as the central axis. The outer scissor leg and the inner scissor leg rotate intersectingly along the same central circular trajectory.

[0006] In a preferred embodiment, the outer scissor legs are provided with outer scissor leg shafts at both ends, and the inner scissor legs are provided with inner scissor leg shafts at both ends. The outer scissor leg shafts and the inner scissor leg shafts are symmetrical about the pivot axis in the X-axis and Y-axis directions.

[0007] In a preferred embodiment, the outer scissor leg has a cavity through which the inner scissor leg rotates up and down, and the two ends of the outer scissor leg are recessed to form grooves for receiving the shaft of the inner scissor leg. When the outer scissor leg and the inner scissor leg are rotated to their limit positions under downward force, the shaft of the inner scissor leg and the shaft of the outer scissor leg overlap each other.

[0008] In a preferred embodiment, the pivot is located at the center of the outer wall of the inner scissor foot, and the pivot and the inner scissor foot are integrally formed.

[0009] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0010] This invention designs the outer and inner scissor legs with an axisymmetric structure centered on a pivot, allowing the inner and outer scissor legs to rotate along the same central circular trajectory. This improves the uniformity and consistency of the button feel. Furthermore, due to the axisymmetric structure, the scissor legs can work stably at different travel heights, breaking through the travel limitations of traditional structures and meeting the needs of high-travel buttons. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a top view of the overall planar structure of this utility model;

[0013] Figure 3 This is a simplified schematic diagram of the overall stacked planar structure of this utility model;

[0014] Figure 4 This is a simplified diagram illustrating the trajectory of the entire structure when it rotates in a cross pattern.

[0015] Marked in the image:

[0016] 100-scissor-foot structure;

[0017] 110 - External scissor foot, 111 - External scissor foot shaft, 112 - Shaft hole;

[0018] 120 - Inner scissor foot, 121 - Inner scissor foot pivot, 122 - Pivot. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] An axisymmetric scissor-leg structure, referenced Figure 1-4 It includes an outer scissor leg 110 and an inner scissor leg 120. The inner wall of the outer scissor leg 110 has a central shaft hole 112. A pivot 122, pivotally connected to the shaft hole 112, is located at the center of the outer wall of the inner scissor leg 120. When subjected to force, the outer scissor leg 110 and the inner scissor leg 120 rotate about the pivot 122. The opposite ends of the outer scissor leg 110 and the inner scissor leg 120 are symmetrically arranged about the pivot 122 as the central axis. The feet 120 rotate intersecting along the same central circular trajectory. The outer scissor feet 110 and the inner scissor feet 120 are designed with an axisymmetric structure with the pivot 122 as the central axis. This allows the inner and outer scissor feet to rotate along the same central circular trajectory, improving the uniformity and consistency of the button feel after assembly. At the same time, due to the axisymmetric structure, the scissor foot structure 100 can work stably at different travel heights, breaking through the travel limitations of traditional structures. It can meet the needs of high-travel buttons without increasing manufacturing costs.

[0023] Specifically, the pivot 122 and the inner scissor foot 120 are integrally formed parts. The integral forming of the pivot 122 and the inner scissor foot 120 reduces the number of parts and assembly complexity, improves structural rigidity and reliability, and reduces the failure rate.

[0024] In this embodiment, please refer to Figure 1 , Figure 3 and Figure 4 As shown, the outer scissor kick 110 has an outer scissor kick shaft 111 at each end, and the inner scissor kick 120 has an inner scissor kick shaft 121 at each end. The outer scissor kick shaft 111 and the inner scissor kick shaft 121 are symmetrical about the X-axis and Y-axis with pivot 122 as the center. The inner scissor kick shaft 121 and the outer scissor kick shaft 111 are respectively connected to the keycap and the base plate. When the keycap is pressed, the inner scissor kick shaft 121 and the outer scissor kick shaft 111 are always in a concentric circle and axially symmetrical state at any position of rotation. This can be widely used for different height travel and avoids the occurrence of problems such as keyboard structure tilting.

[0025] In this embodiment, please refer to Figure 3As shown, the outer scissor leg 110 has a cavity through the middle for the inner scissor leg 120 to rotate up and down. The two ends of the outer scissor leg 110 are recessed to form grooves for accommodating the inner scissor leg shaft 121. When the outer scissor leg 110 and the inner scissor leg 120 are rotated to their limit positions under downward force, the inner scissor leg shaft 121 and the outer scissor leg shaft 111 overlap. The cavity and groove design of the outer scissor leg 110 allows the inner scissor leg shaft 121 to overlap with the outer scissor leg shaft 111 at the rotation limit position, which optimizes space utilization, makes the structure more compact, and is suitable for narrow installation environments.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axisymmetric scissor-leg structure, comprising outer scissor legs and inner scissor legs, characterized in that, The outer scissor leg has a shaft hole at the center of its inner wall, and the outer scissor leg has a pivot that is pivotally connected to the shaft hole. When the outer scissor leg and the inner scissor leg are subjected to force, they rotate intersectingly around the pivot. The opposite ends of the outer scissor leg and the inner scissor leg are symmetrically arranged with the pivot as the central axis. The outer scissor leg and the inner scissor leg rotate intersectingly along the same central circular trajectory.

2. The axisymmetric scissor-leg structure as described in claim 1, characterized in that: The outer scissor leg is provided with an outer scissor leg shaft at both ends, and the inner scissor leg is provided with an inner scissor leg shaft at both ends. The outer scissor leg shaft and the inner scissor leg shaft are symmetrical about the X-axis and Y-axis directions with the pivot as the center.

3. The axisymmetric scissor-leg structure as described in claim 2, characterized in that: The outer scissor leg has a cavity through which the inner scissor leg rotates up and down. The two ends of the outer scissor leg are recessed to form grooves for receiving the shaft of the inner scissor leg. When the outer scissor leg and the inner scissor leg are rotated to their limit positions under downward force, the shaft of the inner scissor leg and the shaft of the outer scissor leg overlap each other.

4. The axisymmetric scissor-leg structure as described in claim 1, characterized in that: The pivot is located at the center of the outer wall of the inner scissor foot, and the pivot and the inner scissor foot are integrally formed.

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