Button device

Abstract

This invention discloses a key device comprising a connector and a keycap. The connector has a locking shaft. The keycap comprises a pressing body and a shaft hole structure. The pressing body has a bottom surface. The shaft hole structure connects to the bottom surface and has a communicating locking groove and an inlet channel. The locking shaft is rotatably engaged within the locking groove. The inlet channel has a first inner wall and a second inner wall that are opposite and parallel. The first inner wall and the second inner wall are inclined relative to the bottom surface of the pressing body.

Description

TECHNICAL FIELD

[0001] The present application relates to a key device. BACKGROUND

[0002] In terms of current personal computer usage habits, the keyboard is one of the indispensable input devices for inputting text or numbers. Not only that, but also all consumer electronics or industrial use of large processing equipment need to have keys as input devices to operate the above-mentioned electronic products and processing equipment.

[0003] However, the keycap of the keyboard is generally connected by a notch structure (such as a water drop hole) and a lower connection structure, but the keycap often falls off due to insufficient tensile strength during the keycap pull test.

[0004] Therefore, how to propose a key device that can solve the above problems is one of the problems that the industry tries to invest in research and development resources to solve. SUMMARY

[0005] Therefore, the purpose of the present application is to propose a key device that can solve the above problems.

[0006] In order to achieve the above purpose, according to an embodiment of the present application, a key device includes a connecting member and a keycap. The connecting member has a clamping shaft. The keycap includes a pressing body and a shaft hole structure. The pressing body has a bottom surface. The shaft hole structure is connected to the bottom surface and has a clamping groove and an entrance channel in communication. The clamping shaft is rotatably clamped in the clamping groove. The entrance channel has a first inner wall and a second inner wall that are opposite and parallel. The first inner wall and the second inner wall are inclined relative to the bottom surface of the pressing body.

[0007] In one or more embodiments of the present application, the clamping shaft has a central axis. A virtual line segment extending in a radial direction perpendicular to the central axis is equidistantly located between the first inner wall and the second inner wall.

[0008] In one or more embodiments of the present application, the shaft hole structure includes at least one first side clamping block and at least one second side clamping block. The first side clamping block constitutes a part of the clamping groove and has the first inner wall. The second side clamping block constitutes another part of the clamping groove and has the second inner wall. The first side clamping block and the second side clamping block are connected to the bottom surface and separated from each other.

[0009] In one or more embodiments of the present application, the first side clamping block and the second side clamping block respectively have a first clamping wall and a second clamping wall. The first clamping wall and the second clamping wall are connected to the first inner wall and the second inner wall, respectively, and are configured to clamp the clamping shaft. The clamping groove is at least composed of the first clamping wall and the second clamping wall.

[0010] In one or more embodiments of the present application, at least a portion of one of the first engaging wall and the second engaging wall is a straight wall.

[0011] In one or more embodiments of the present application, the straight wall is perpendicular to the bottom surface of the pressing body.

[0012] In one or more embodiments of the present application, the straight wall is inclined with respect to the bottom surface of the pressing body.

[0013] In one or more embodiments of the present application, the first engaging wall is a circular arc wall.

[0014] In one or more embodiments of the present application, the shaft hole structure comprises a first bottom surface and a second bottom surface. The height of the first bottom surface with respect to the bottom surface of the pressing body is greater than the height of the second bottom surface with respect to the bottom surface of the pressing body.

[0015] In one or more embodiments of the present application, the first inner wall is closer to the center of the pressing body than the second inner wall. The first inner wall and the second inner wall are inclined away from the center of the pressing body.

[0016] In one or more embodiments of the present application, an included angle is formed between the normal line of the bottom surface and the first inner wall. The included angle is 10 to 45 degrees.

[0017] In one or more embodiments of the present application, the shaft hole structure further has a guide angle. The guide angle is connected to one end of the first inner wall away from the engaging slot.

[0018] In summary, in the key device of the present application, since the shaft hole structure of the bottom of the keycap has an inclined entrance channel (i.e., the first inner wall and the second inner wall are inclined with respect to the bottom surface of the pressing body), the amount of interference between the shaft hole structure and the engaging shaft of the lower connector in the horizontal direction can be increased when the keycap is subjected to the pull test, thereby effectively improving the pull resistance of the keycap. Moreover, by making the first inner wall and the second inner wall parallel to each other, the structural strength of the shaft hole structure at the entrance channel can be effectively increased, thereby further improving the pull resistance of the keycap.

[0019] The above merely describes the problems to be solved by the present application, the technical means for solving the problems, and the effects thereof. The specific details of the present application will be described in detail in the embodiments and the related drawings below. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the above and other purposes, features, advantages and embodiments of the present application more apparent, the following describes the accompanying drawings:

[0021] Figure 1 To illustrate a schematic diagram of an assembly stage of a key device according to an embodiment of the present application;

[0022] Figure 2 is a schematic view of a next assembly stage of the key device in Figure 1 ;

[0023] Figure 3 is a schematic view of a next assembly stage of the key device in Figure 2 ;

[0024] Figure 4 is a schematic view of a next assembly stage of the key device in Figure 3 ;

[0025] Figure 5 is a partial enlarged view of the key device in Figure 4 ;

[0026] Figure 6 is a partial view of a key cap according to another embodiment of the present application;

[0027] Figure 7 is a partial view of a key cap according to another embodiment of the present application;

[0028] Figure 8 is a partial view of a key cap according to another embodiment of the present application;

[0029] Figure 9 is a partial view of a key cap according to another embodiment of the present application;

[0030] Figure 10 is a partial view of a key cap according to another embodiment of the present application; Figure 7 ;

[0031] Figure 11 is a partial view of a key cap according to another embodiment of the present application;

[0032] Figure 12 is a partial view of a key cap according to another embodiment of the present application;

[0033] Figure 13 is a partial view of a key cap according to another embodiment of the present application.

[0034]

BRIEF DESCRIPTION OF DRAWINGS

[0035] 100: key device

[0036] 110: base plate

[0037] 120: connecting assembly

[0038] 121, 122: connecting member

[0039] 121a: engaging shaft

[0040] 122a: Sliding shaft

[0041] 130, 230, 330, 430, 530, 630, 730, 830: Keycaps

[0042] 131: Press the main body

[0043] 131a: Bottom surface

[0044] 132,232,332,432,532,632,732,832: Shaft hole structure

[0045] 132a, 232c, 332c, 432c, 832c: Engagement slot

[0046] 132b, 232d: Entrance passage

[0047] 132b1,232a2: First inner wall

[0048] 132b2, 232b2: Second inner wall

[0049] 132b3: Chamfer

[0050] 132b4: First base

[0051] 132b5: Second base

[0052] 133: Slide Structure

[0053] 232a, 332a, 432a, 632a, 732a, 832a: First side locking block

[0054] 232a1, 332a1, 432a1, 832a1: First card combined

[0055] 232b, 532b: Second side locking block

[0056] 232b1: Second Card Combination

[0057] 232b3, 532b1, 632a1: Gap

[0058] 732c: Ribs

[0059] 832a11: First wall section

[0060] 832a12: Second wall portion

[0061] A: Central axis

[0062] N: Normal line

[0063] P: Virtual line segment

[0064] θ: included angle Detailed Implementation

[0065] The following describes several embodiments of the present invention with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and elements will be shown in the drawings in a simple schematic manner.

[0066] Please refer to Figures 1 to 4 . Figure 1 This is a schematic diagram illustrating an assembly stage of a button device 100 according to an embodiment of the present invention. Figure 2 For illustration Figure 1 A schematic diagram of the next assembly stage of the button device 100. Figure 3 For illustration Figure 2 A schematic diagram of the next assembly stage of the button device 100. Figure 4 For illustration Figure 3 A schematic diagram of the next assembly stage of the button device 100. (See diagram below.) Figure 1 As shown, in this embodiment, the key device 100 includes a base plate 110, a connecting assembly 120, and a keycap 130. The connecting assembly 120 is connected between the base plate 110 and the keycap 130 and is configured to drive the keycap 130 to move up and down relative to the base plate 110. The connecting assembly 120 includes connectors 121 and 122. Connector 121 has a locking shaft 121a for engaging with the keycap 130. Connector 122 has a sliding shaft 122a for engaging with the keycap 130. The keycap 130 includes a pressing body 131, a shaft hole structure 132, and a sliding groove structure 133. The pressing body 131 has a bottom surface 131a. The shaft hole structure 132 and the sliding groove structure 133 are connected to the bottom surface 131a. The shaft hole structure 132 has a communicating locking groove 132a and an inlet channel 132b. The engaging groove 132a is configured to rotatably engage with the engaging shaft 121a. The sliding groove structure 133 is configured to slidably engage with the sliding shaft 122a.

[0067] During assembly, the keycap 130 can be tilted and moved to allow the slide groove structure 133 to connect with the sliding shaft 122a, such as... Figure 2 As shown. At this time, the inlet channel 132b of the shaft hole structure 132 can just abut against the engaging shaft 121a of the connector 121. Next, the keycap 130 is pressed down flat, so that the engaging shaft 121a of the connector 121 connects with the engaging groove 132a through the inlet channel 132b, as shown. Figure 3As shown. Finally, the key mechanism 100 may further include a reset member (not shown, such as a rubber dome) disposed between the base plate 110 and the keycap 130, and this reset member can push the keycap 130 upward to the unpressed position (i.e., the highest position of the keycap 130 in the pressing stroke), as shown. Figure 4 As shown.

[0068] In this embodiment, the connecting component 120 is a scissor-type connecting structure, but the present invention is not limited thereto. In practical applications, the connecting component 120 can also be replaced with other support structures with similar functions (i.e., driving the keycap 130 to rise and fall relative to the base plate 110), such as V-shaped, A-shaped, or two parallel linkage structures.

[0069] Please refer to Figure 5 It is a drawing Figure 4 A partially enlarged view of the button device 100. (See attached image.) Figure 5 As shown, in this embodiment, the inlet channel 132b has opposing first inner walls 132b1 and second inner walls 132b2. The first inner wall 132b1 and the second inner wall 132b2 are inclined relative to the bottom surface 131a of the pressing body 131. (See reference) Figure 2 The first inner wall 132b1 is closer to the center of the pressing body 131 than the second inner wall 132b2. For example... Figure 1 As shown, the normal N of the bottom surface 131a at the center of the engaging groove 132a forms an angle θ with the first inner wall 132b1. The first inner wall 132b1 and the second inner wall 132b2 are inclined relative to the normal N away from the center of the pressing body 131.

[0070] By configuring the structure as described above, the horizontal interference between the shaft hole structure 132 and the engaging shaft 121a of the lower connector 121 can be increased during the pull-out test of the keycap 130, thereby effectively improving the tensile strength of the keycap 130. In other words, the tensile strength of the keycap 130 can be significantly improved by appropriately adjusting the aforementioned interference amount.

[0071] In some embodiments, the included angle θ is between 10 and 45 degrees. When the included angle θ is less than the aforementioned range, the amount of interference in the horizontal direction between the shaft hole structure 132 and the engaging shaft 121a may not be large enough to effectively improve the tensile strength (i.e., ease of disassembly) of the keycap 130; when the included angle θ is greater than the aforementioned range, the inlet channel 132b will be too tilted, thus... Figure 2 When the keycap 130 is pressed down during the assembly stage shown, it is not easy for the engaging shaft 121a to enter the engaging slot 132a through the inlet channel 132b (i.e., difficult to assemble).

[0072] Furthermore, in this embodiment, the first inner wall 132b1 and the second inner wall 132b2 are parallel to each other. This effectively increases the structural strength of the shaft hole structure 132 at the entrance channel 132b, thereby further enhancing the tensile strength of the keycap 130.

[0073] like Figure 5 As shown, in this embodiment, the engaging shaft 121a has a central axis A. A virtual line segment P extending radially perpendicular to the central axis A is equidistantly located between the first inner wall 132b1 and the second inner wall 132b2. Therefore, during the oblique pressing of the engaging shaft 121a into the engaging groove 132a, the interference amounts of the first inner wall 132b1 and the second inner wall 132b2 with respect to the engaging shaft 121a are consistent, thereby allowing the engaging shaft 121a to accurately enter the engaging groove 132a through the inlet channel 132b.

[0074] As can be clearly seen from the foregoing disclosure, the shaft hole structure 132 with the aforementioned structural configuration has the advantage of being easy to assemble and difficult to disassemble compared to the engaging shaft 121a.

[0075] In some implementations, such as Figure 5 As shown, the shaft hole structure 132 further includes a first bottom surface 132b4 and a second bottom surface 132b5. The first bottom surface 132b4 and the second bottom surface 132b5 are respectively connected to the first inner wall 132b1 and the second inner wall 132b2. The height of the first bottom surface 132b4 relative to the bottom surface 131a is greater than the height of the second bottom surface 132b5 relative to the bottom surface 131a. The height difference between the first bottom surface 132b4 and the second bottom surface 132b5 helps to engage the shaft 121a and the inlet channel 132b. Figure 2 Alignment is performed during the assembly stage shown.

[0076] In some implementations, such as Figure 5 As shown, the shaft hole structure 132 further has a chamfer 132b3. The chamfer 132b3 is connected to the end of the first inner wall 132b1 away from the engaging groove 132a, that is, between the first inner wall 132b1 and the first bottom surface 132b4. The chamfer 132b3 can reduce the obstruction of the shaft hole structure 132 on the engaging shaft 121a during the process of the keycap 130 being pressed down and the engaging shaft 121a moving from the first bottom surface 132b4 to abutting the inlet channel 132b.

[0077] Please refer to Figure 6 This is a partial schematic diagram illustrating a keycap 230 according to another embodiment of the present invention. Figure 6 As shown, in this embodiment, the keycap 230 includes a pressing body 131 and a shaft hole structure 232. The pressing body 131 and... Figure 5The illustrated implementation is the same and will not be described again here. The shaft hole structure 232 includes a first side engaging block 232a and a second side engaging block 232b. The first side engaging block 232a forms part of the engaging groove 232c and has a first inner wall 232a2. The second side engaging block 232b forms the other part of the engaging groove 232c and has a second inner wall 232b2. The first side engaging block 232a and the second side engaging block 232b are connected to the bottom surface 131a and are separate from each other.

[0078] In the embodiment where the keycap 230 is manufactured by plastic injection molding, by designing the shaft hole structure 232 to include a first side engagement block 232a and a second side engagement block 232b that are separate from each other, the problem of material shrinkage at the position of the keycap 230's pressing body 131 corresponding to the shaft hole structure 232 can be effectively solved.

[0079] like Figure 6 As shown, the height of the first side engaging block 232a relative to the bottom surface 131a is greater than the height of the second side engaging block 232b relative to the bottom surface 131a. This height difference between the first side engaging block 232a and the second side engaging block 232b facilitates the engagement between the engaging shaft 121a and the inlet channel 232d. Figure 2 Alignment is performed during the assembly stage shown.

[0080] In detail, the first side engaging block 232a and the second side engaging block 232b each have a first engaging wall 232a1 and a second engaging wall 232b1. The first engaging wall 232a1 and the second engaging wall 232b1 are respectively connected to the first inner wall 232a2 and the second inner wall 232b2, and are configured with engaging shaft 121a. The engaging groove 232c is formed by at least the first engaging wall 232a1 and the second engaging wall 232b1.

[0081] exist Figure 6 In the illustrated embodiment, a portion of the first engaging wall 232a1 and the second engaging wall 232b1 are straight walls. These straight walls are perpendicular to the bottom surface 131a of the pressing body 131. The normal N of the bottom surface 131a at the center of the engaging groove 232c is parallel and equidistantly located between the first engaging wall 232a1 and the second engaging wall 232b1, thereby facilitating the engagement of the engaging shaft 121a (at... Figure 6 (Indicated by dashed lines) When engaged in the engagement groove 232c, it firmly abuts against the first engagement wall 232a1 and the second engagement wall 232b1. However, the present invention is not limited thereto.

[0082] Please refer to Figure 7 This is a partial schematic diagram illustrating a keycap 330 according to another embodiment of the present invention. Figure 7As shown, in this embodiment, the keycap 330 includes a pressing body 131 and a shaft hole structure 332. The pressing body 131 and... Figure 5 The implementation shown is the same and will not be described again here. The shaft hole structure 332 includes a first side engaging block 332a and a second side engaging block 232b. The first side engaging block 332a forms part of the engaging groove 332c and has a first inner wall 232a2. The second side engaging block 232b forms the other part of the engaging groove 332c. The first side engaging block 332a and the second side engaging block 232b are connected to the bottom surface 131a and are separate from each other. The first side engaging block 332a has a first engaging wall 332a1. The first engaging wall 332a1 is connected to the first inner wall 232a2. It should be noted that, compared to Figure 6 In the embodiment shown, the first engaging wall 332a1 is an arc-shaped wall and is configured to conform to a portion of the surface of the engaging shaft 121a, thereby increasing the contact area.

[0083] Please refer to Figure 8 This is a partial schematic diagram illustrating a keycap 430 according to another embodiment of the present invention. Figure 8 As shown, in this embodiment, the keycap 430 includes a pressing body 131 and a shaft hole structure 432. The pressing body 131 and... Figure 5 The implementation shown is the same and will not be described again here. The shaft hole structure 432 includes a first side engaging block 432a and a second side engaging block 232b. The first side engaging block 432a forms part of the engaging groove 432c and has a first inner wall 232a2. The second side engaging block 232b forms the other part of the engaging groove 432c. The first side engaging block 432a and the second side engaging block 232b are connected to the bottom surface 131a and are separate from each other. The first side engaging block 432a has a first engaging wall 432a1. The first engaging wall 432a1 is connected to the first inner wall 232a2. It should be noted that, compared to Figure 6 In the embodiment shown, the first engaging wall 432a1 of this embodiment is a straight wall portion that is inclined relative to the bottom surface 131a of the pressing body 131.

[0084] Please refer to Figure 9 This is a partial schematic diagram illustrating a keycap 830 according to another embodiment of the present invention. Figure 9 As shown, in this embodiment, the keycap 830 includes a pressing body 131 and a shaft hole structure 832. The pressing body 131 and... Figure 5The implementation shown is the same and will not be described again here. The shaft hole structure 832 includes a first side engaging block 832a and a second side engaging block 232b. The first side engaging block 832a forms part of the engaging groove 832c and has a first inner wall 232a2. The second side engaging block 232b forms the other part of the engaging groove 832c. The first side engaging block 832a and the second side engaging block 232b are connected to the bottom surface 131a and are separate from each other. The first side engaging block 832a has a first engaging wall 832a1. The first engaging wall 832a1 is connected to the first inner wall 232a2. It should be noted that, compared to Figure 6 In the embodiment shown, the first engaging wall 832a1 has a first wall portion 832a11 and a second wall portion 832a12 connected together. The first wall portion 832a11 is connected between the bottom surface 131a and the second wall portion 832a12. The second wall portion 832a12 is connected between the first wall portion 832a11 and the first inner wall 232a2. Both the first wall portion 832a11 and the second wall portion 832a12 are straight walls, and a right angle is formed between them.

[0085] exist Figures 6 to 9 In the embodiment shown, the wall surface of the snap-fit ​​wall may include a vertical surface, an arc surface, an inclined straight surface, or a composite straight surface forming a right angle. These structures will make the contact area between the snap-fit ​​wall and the bottom surface 131a of the pressing body 131 uniform, so that the surface of the keycap 130 is less likely to have surface shrinkage problems in plastic injection molding, and can also increase the strength of the inclined pin structure of the plastic mold design.

[0086] In addition, Figures 6 to 9 In the embodiment shown, the end of the first inner wall 232a2 away from the engaging grooves 232c, 332c, 432c, and 832c can be further connected to, for example... Figure 5 The chamfer 132b3 is shown. The chamfer 132b3 can reduce the obstruction of the shaft hole structure 132 on the locking shaft 121a during the process of the locking shaft 121a moving from the first side locking blocks 232a, 332a, 432a, 832a to abutting the inlet channel 232d when the keycap 130 is pressed down.

[0087] Please refer to Figure 10 It is a drawing Figure 7 A partial 3D view of keycap 330 in the image. (See image for reference.) Figure 10As shown, in this embodiment, the shaft hole structure 332 includes only one first side engaging block 332a and one second side engaging block 232b. However, the present invention is not limited thereto. Specifically, the second side engaging block 232b has a notch 232b3. The notch 232b3 is located on the side of the second side engaging block 232b away from the first side engaging block 332a, and is formed along the normal N to abut against the bottom surface 131a of the pressing body 131. Thereby, the thickness of the second side engaging block 232b is uniform, which helps to reduce the shrinkage problem of the keycap 130 surface during plastic injection molding.

[0088] Please refer to Figure 11 This is a partial perspective view illustrating a keycap 530 according to another embodiment of the present invention. Figure 11 As shown, in this embodiment, the shaft hole structure 532 includes a first side engaging block 332a and two second side engaging blocks 532b. Figure 10 The single second-side engagement block 232b shown is replaced by two second-side engagement blocks 532b in this embodiment, which further avoids the problem of material shrinkage in the pressing body 131 of the keycap 530 at the position corresponding to the second-side engagement block 532b. Specifically, there is a notch 532b1 between the two second-side engagement blocks 532b, and this notch 532b1 extends from the side of the second-side engagement block 532b away from the first-side engagement block 332a to the side of the second-side engagement block 532b closer to the first-side engagement block 332a. Please refer to... Figure 12 This is a partial perspective view illustrating a keycap 630 according to another embodiment of the present invention. Figure 12 As shown, in this embodiment, the shaft hole structure 632 includes two first-side engaging blocks 632a and two second-side engaging blocks 532b. Figure 11 The single first side engagement block 332a shown is replaced by two first side engagement blocks 632a in this embodiment, which further avoids the problem of material shrinkage in the pressing body 131 of the keycap 630 at the position corresponding to the first side engagement block 632a. Specifically, there is a notch 632a1 between the two first side engagement blocks 632a, and this notch 632a1 extends from the side of the first side engagement block 632a away from the second side engagement block 532b to the side of the first side engagement block 632a closer to the second side engagement block 532b. Please refer to... Figure 13 This is a partial perspective view illustrating a keycap 730 according to another embodiment of the present invention. Compared to Figure 12 In the embodiment shown, the shaft hole structure 732 of this embodiment further includes a rib 732c connected between the two first side engaging blocks 732a, thereby increasing the overall structural strength of the two first side engaging blocks 732a.

[0089] From the detailed description of the specific embodiments of the present invention above, it is evident that in the key device of the present invention, since the shaft hole structure at the bottom of the keycap has an inclined inlet channel (that is, the first inner wall and the second inner wall are inclined relative to the bottom surface of the pressing body), the amount of interference in the horizontal direction between the shaft hole structure and the engagement shaft of the lower connector can be increased during the keycap pull-out test, thereby effectively improving the tensile strength of the keycap. Furthermore, by making the first inner wall and the second inner wall parallel to each other, the structural strength of the shaft hole structure at the inlet channel can be effectively increased, thereby further improving the tensile strength of the keycap.

[0090] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A key device, characterized by, Comprising: a connector having a snap shaft and a sliding shaft; and a keycap comprising: a pressing body having a bottom surface; and a shaft hole structure directly connected to the bottom surface and having a snap groove and an entry channel in communication, wherein the snap shaft is rotatably snapped into the snap groove; a sliding groove structure configured to slidably engage with the sliding shaft, wherein the entry channel has a first inner wall and a second inner wall opposite and parallel to each other, and the first inner wall and the second inner wall are inclined relative to the bottom surface of the pressing body, and the first inner wall is closer to the center of the pressing body than the second inner wall, and the first inner wall and the second inner wall are inclined away from the center of the pressing body, wherein the moving direction of the keycap is parallel to the normal line of the bottom surface at the center of the snap groove.

2. The key device according to claim 1, wherein The snap shaft has a central axis, and a virtual line segment extending in a radial direction perpendicular to the central axis is equidistantly located between the first inner wall and the second inner wall.

3. The key device of claim 1, wherein The shaft hole structure comprises: at least one first side snap block constituting a part of the snap groove and having the first inner wall; and at least one second side snap block constituting another part of the snap groove and having the second inner wall, wherein the at least one first side snap block and the at least one second side snap block are connected to the bottom surface and separated from each other.

4. The key device according to claim 3, wherein The at least one first side snap block and the at least one second side snap block respectively have a first snap wall and a second snap wall connected to the first inner wall and the second inner wall respectively and configured to snap the snap shaft, and the snap groove is at least constituted by the first snap wall and the second snap wall.

5. The key device according to claim 4, wherein At least a part of one of the first snap wall and the second snap wall is a straight wall.

6. The key device according to claim 5, wherein The straight wall is perpendicular to the bottom surface of the pressing body.

7. The key device of claim 5, wherein The straight wall is inclined relative to the bottom surface of the pressing body.

8. The key device of claim 4, wherein The first snap wall is a circular arc wall.

9. The key device of claim 1, wherein The shaft hole structure comprises a first bottom surface and a second bottom surface, and the height of the first bottom surface relative to the bottom surface of the pressing body is greater than the height of the second bottom surface relative to the bottom surface of the pressing body.

10. The key device of claim 1, wherein An included angle is formed between the normal line of the bottom surface and the first inner wall, and the included angle is 10 to 45 degrees.

11. The key device according to claim 1 or 3, wherein The shaft hole structure further has a guide angle connected to an end of the first inner wall away from the snap groove.

Images