Scissor foot for keycap

Abstract

A scissor foot for a keycap comprises an outer scissor and an inner scissor, rotating shafts are arranged on the outer walls of two short edges of the inner scissor respectively, shaft holes are formed in the inner walls of the two short edges of the outer scissor respectively, an opening is formed in the mounting face, corresponding to the shaft holes, of the outer scissor, the opening is communicated with the shaft holes, and the width of the opening is smaller than the aperture of the shaft holes. Two pairs of receding grooves are further formed in the mounting face of the outer scissor, each pair of receding grooves are located on the two sides of the corresponding opening respectively and are spaced from each other, and the rotating shafts on the two sides of the inner scissor are matched with the corresponding shaft holes through the openings and combined to form the scissor foot for the key cap. The inner shear foot is simple in structure and convenient to assemble, the opening expansion resistance is reduced by arranging the receding groove, the deformation amount of the inner shear rotating shaft in the process of penetrating through the opening is effectively reduced, and then the quality of the assembled shear foot is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of laptop computers, and in particular to a scissor-switch keycap. Background Technology

[0002] The scissor-switch mechanism is located below the laptop keycaps and connects them to the keyboard support plate. When a keycap is pressed down and the scissor-switch mechanism resets, it presses down and springs back, respectively, making contact with or disengaging from the contact switch on the circuit board, thus serving as an input signal.

[0003] See Figure 1 This is a conventional scissor-leg structure, including an outer scissor and an inner scissor, both formed by injection molding. The inner frame of the outer scissor has shaft holes on both sides, while the inner scissor has pivots on both sides. During assembly, this type of scissor leg requires manual insertion of the pivot on one side of the inner scissor into the corresponding shaft hole, followed by expansion of the inner frame of the outer scissor to insert the pivot on the other side into the corresponding shaft hole, resulting in low assembly efficiency.

[0004] Some designs, such as CN 102479621 B, feature grooves on the outer shear plate that connect to the shaft holes. This type of scissor-leg structure allows the rotating shafts on both sides of the inner shear plate to be pressed into the corresponding shaft holes via the grooves, significantly improving assembly efficiency. However, during assembly, the rotating shafts on both sides of the inner shear plate can deform or even break as they compress the grooves and enter the shaft holes, potentially causing quality issues.

[0005] Therefore, how to design a scissor-leg structure that is simple in structure and easy to assemble is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a scissor-switch keycap, which has a simple structure and is easy to assemble. By setting a clearance groove to reduce the resistance to opening expansion, it effectively reduces the deformation of the inner shear shaft during the process of passing through the opening, thereby ensuring the quality of the assembled scissor-switch keycap.

[0007] The technical solution of this utility model is: a scissor-switch keycap, comprising an outer scissor and an inner scissor. A pivot is provided on the outer wall of each of the two short sides of the inner scissor, and a pivot hole is provided on the inner wall of each of the two short sides of the outer scissor. An opening is provided on the mounting surface of the outer scissor corresponding to the pivot hole, the opening communicating with the pivot hole, and the width of the opening being smaller than the diameter of the pivot hole. Two pairs of clearance grooves are also provided on the mounting surface of the outer scissor, each pair located on both sides of the corresponding opening and spaced apart. The pivots on both sides of the inner scissor engage with the corresponding pivot holes through the openings, thus forming the scissor-switch keycap.

[0008] The width of each relief groove gradually increases from the bottom to the opening.

[0009] The groove wall of each relief groove away from the opening is perpendicular to the outer shear mounting surface, and the groove wall of the relief groove near the opening extends inclined towards the opening.

[0010] The bottom of each relief groove is at the same height as the center line of the shaft hole.

[0011] The inner wall of the opening is connected to the mounting surface of the outer shear via an arc transition, and the inner wall of the opening and the mounting surface of the outer shear are perpendicular to each other.

[0012] The rotating shaft is connected to the outer wall of the inner short side through an arc transition, and the opening of the shaft hole is recessed inward to form a clearance space.

[0013] A limiting boss is provided on the circumferential sidewall of the rotating shaft. The limiting boss is located in the opening, and the width of the limiting boss is smaller than the width of the opening.

[0014] The height of the limiting boss is adapted to the depth of the opening.

[0015] An outer shear is fitted with one or two inner shears, with the two inner shears spaced apart along the length of the outer shear.

[0016] The above technical solution has the following beneficial effects:

[0017] 1. The keycap scissor-switch mechanism comprises an outer scissor and an inner scissor, which are two detachable and combinable components. The inner scissor has a pivot on each of its two short outer sides, and the outer scissor has a pivot hole on each of its two short inner sides. The inner and outer scissors engage through the pivots and pivot holes to form a rotating scissor structure. The outer scissor has an opening on its mounting surface corresponding to the pivot hole, which communicates with the pivot hole. The width of the opening is smaller than the diameter of the pivot hole; that is, the pivot hole communicates with the mounting surface of the outer scissor through the opening. The mounting surface of the outer scissor also has two pairs of clearance grooves, each pair located on either side of the corresponding opening and spaced apart. This reduces the thickness of the sidewall of the opening, decreasing the deformation resistance of the sidewall towards the corresponding clearance groove when the opening is subjected to compressive force. The pivots on both sides of the inner scissor engage with the corresponding pivot holes through the openings to form the keycap scissor mechanism. The pivot of the inner scissor is pressed into the pivot hole through the opening, making assembly simple and convenient. Furthermore, it has high assembly efficiency. Due to the small deformation resistance of the opening, the resistance encountered by the inner shear shaft as it passes through the opening is reduced, which can also effectively reduce the deformation of the inner shear shaft and ensure the quality of the assembled scissor feet.

[0018] 2. The width of each relief groove gradually increases from the bottom to the opening. The groove wall of each relief groove away from the opening is perpendicular to the outer shear mounting surface. The groove wall of the relief groove near the opening extends inclined towards the opening. This structure of the opening groove facilitates the demolding of the outer shear in the injection molding machine. In addition, it can ensure that the expansion resistance of the opening is small enough when the rotating shaft passes through the mounting surface, and that the expansion resistance of the opening is large enough when the rotating shaft passes through the shaft hole and exits the opening. It can also effectively reduce the risk of the inner shear falling off the outer shear.

[0019] 3. A limiting boss is provided on the circumferential side wall of the rotating shaft. The limiting boss is located in the opening, and the width of the limiting boss is smaller than the width of the opening. It is used to limit the rotation angle of the inner shear and meet the actual needs of the enterprise. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the traditional scissor-type structure in the background art;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 for Figure 2 Sectional view along line AA;

[0023] Figure 4 This is an exploded view of the present invention;

[0024] Figure 5 for Figure 4 Enlarged view at point M;

[0025] Figure 6 for Figure 4 Enlarged view at point N in the middle.

[0026] In the attached diagram, 1 is the outer shear, 2 is the inner shear, 3 is the rotating shaft, 4 is the shaft hole, 5 is the opening, 6 is the clearance groove, 8 is the clearance space, and 9 is the limiting boss. Detailed Implementation

[0027] See Figures 2 to 6This is a specific embodiment of a scissor-switch keycap. The scissor-switch keycap includes an outer scissor 1 and an inner scissor 2, both of which are injection molded. A pivot 3 is provided on each of the two short outer walls of the inner scissor 2, and a limiting boss 9 is provided on the circumferential side wall of the pivot. Furthermore, the pivot 3 and the short outer wall of the inner scissor 2 are connected by an arc transition. A shaft hole 4 is provided on each of the two short inner walls of the outer scissor 1. In this embodiment, two inner scissors are assembled in one outer scissor, that is, two mounting frames are provided in one outer scissor. These two mounting frames are spaced apart along the length of the outer scissor and are obviously symmetrically distributed along the center of the outer scissor. A shaft hole is provided on each of the two short inner walls of these two mounting frames, and typically, the shaft hole is located in the middle of the short inner wall. This type of scissor-switch keycap can be used for long keycaps in laptops, such as the spacebar. Of course, one inner scissor can also be assembled in one outer scissor, corresponding to laptop numeric keycaps, laptop letter keycaps, etc. An opening 5 is provided on the mounting surface of the outer shear 1 corresponding to the shaft hole 4. In this embodiment, the mounting surface of the outer shear corresponds to the top surface. The opening 5 communicates with the shaft hole 4, and the width of the opening 5 is smaller than the diameter of the shaft hole 4. In this embodiment, the inner wall of the opening 5 is connected to the mounting surface of the outer shear 1 by an arc transition, and the inner wall of the opening 5 is perpendicular to the mounting surface of the outer shear. The depth of the opening is adapted to the height of the limiting boss on the rotating shaft, and obviously, the width of the opening is greater than the width of the limiting boss 9. In addition, the opening of the shaft hole 4 is recessed inward to form a clearance space 8 for accommodating the arc surface at the root of the rotating shaft. Two pairs of clearance grooves 6 are also provided on the mounting surface of the outer shear 1. Each pair of clearance grooves 6 is located on both sides of the corresponding opening 5 and is spaced apart. In order to further reduce the expansion resistance of the opening and reduce the risk of the rotating shaft sliding out of the shaft hole along the opening, the width of the bottom of each clearance groove 6 gradually increases towards the opening. Specifically, the groove wall of each clearance groove 6 away from the opening 5 is perpendicular to the mounting surface of the outer shear, and the groove wall of the clearance groove 6 near the opening 5 extends inclined towards the opening 5. The bottom of each clearance groove 6 is at the same height as the center line of the shaft hole 4. The rotating shafts 3 on both sides of the inner shear 2 cooperate with the corresponding shaft holes 4 through the opening 5, and the limiting boss 9 is located in the opening 5, which together form the scissor legs for the keycap.

[0028] The assembly process of this utility model is as follows: After positioning the outer shear, the inner shear is transferred to the mounting frame position of the outer shear by a robot arm, and the inner shear is moved toward the mounting surface of the outer shear. The rotating shafts on both sides of the inner shear squeeze the opening and deform it toward the relief grooves on both sides, so that the rotating shaft of the inner shear passes through the opening and enters the corresponding shaft hole. At the same time, the opening restores its width. The inner shear is installed in the mounting frame of the outer shear, and its rotation angle is limited by the limiting boss and the opening, thus completing the assembly process.

Claims

1. A scissors foot for keycaps, comprising an outer scissor (1) and an inner scissor (2), the inner scissor (2) is provided with a rotating shaft (3) on the outer wall of each short side, and the outer scissor (1) is provided with a shaft hole (4) on the inner wall of each short side, characterized in that: The mounting surface of the outer scissors (1) corresponding to the shaft hole (4) is provided with an opening (5) which communicates with the shaft hole (4) and has a width smaller than the hole diameter of the shaft hole (4), and the mounting surface of the outer scissors (1) is further provided with two pairs of accommodation grooves (6), each pair of accommodation grooves (6) being located on the two sides of the corresponding opening (5) and having a spacing distance, and the shaft (3) on the two sides of the inner scissors (2) is matched with the corresponding shaft hole (4) through the opening (5) to form a keycap scissors leg.

2. The scissor foot for keycaps of claim 1, wherein: The width of the groove bottom of each accommodation groove (6) gradually increases towards the groove opening.

3. The scissor foot for keycaps of claim 2, wherein: The groove wall of each accommodation groove (6) far away from the opening (5) is vertically distributed with the mounting surface of the outer scissors, and the groove wall of the accommodation groove (6) near the opening (5) extends obliquely towards the opening (5).

4. The scissor foot for keycaps according to any one of claims 1 to 3, characterized in that: The groove bottom of each accommodation groove (6) is located at the same height as the center line of the shaft hole (4).

5. The scissor foot for keycaps of claim 1, wherein: The inner wall of the opening (5) and the mounting surface of the outer scissors (1) are connected through an arc surface, and the inner wall of the opening (5) is vertically distributed with the mounting surface of the outer scissors.

6. The scissor foot for keycaps of claim 1, wherein: The shaft (3) and the short side outer wall of the inner scissors (2) are connected through an arc surface, and the hole opening of the shaft hole (4) is recessed inward to form an accommodation space (8).

7. The scissor foot for keycaps of claim 1, wherein: The circumferential side wall of the shaft (3) is provided with a limiting boss (9), the limiting boss (9) is located in the opening (5), and the width of the limiting boss (9) is smaller than the width of the opening (5).

8. The scissor foot for keycaps of claim 7, wherein: The height of the limiting boss (9) is adapted to the depth of the opening (5).

9. The scissor foot for keycaps of claim 1, wherein: One outer scissors (1) is assembled with one or two inner scissors (2), and the two inner scissors (2) are spaced apart along the length direction of the outer scissors (1).

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