Button

Abstract

To provide a button.SOLUTION: A button installed on a plate body is provided. The button includes a front frame, an optical switch module, and a fixing ring. The front frame includes a second penetration hole, an outer flange, a positioning part, and an accommodation groove. The outer flange is installed at a front end of the second penetration hole and surrounds the second penetration hole. The positioning part is installed in the second penetration hole and exists between the front end and a rear end of the second penetration hole. The accommodation groove is provided on at least one side wall surface of the front frame. The optical switch module is connected to the front frame and attached to the inside of the second penetration hole. The fixing ring is fitted to the rear end and includes an inner ring, an outer ring, and a connection part connecting between the outer ring and the inner ring. The inner ring, the outer ring, and the connection part surround the accommodation space altogether. The accommodation space accommodates the rear end when the fixing ring and the front frame are connected. The inner ring presses the substrate of the optical switch module to pressurize the positioning part. The outer ring holds the plate body together with the outer flange.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to buttons, and more particularly to optical trigger buttons. [Background technology]

[0002] Buttons are common components for operating machines and electrical equipment. There are many considerations when it comes to button installation. For example, when applied to machine tools, different buttons are installed according to the functions of different devices. When applied to elevators, buttons are installed corresponding to each floor. As the functions of the device become more complex or the number of objects to be operated increases, the number of buttons required becomes increasingly complex. This significantly increases the time required to install the buttons, the number of parts required for assembly, and the possibility of errors during installation, making it easier for interference between buttons to occur.

[0003] Buttons are divided into contact and non-contact types based on the trigger method. Some structures of contactless buttons include a detection unit and a corresponding light-emitting element. Because the components are complex, how to arrange each component in the limited space of the button and avoid installation difficulties while maintaining good detection accuracy of the button are important issues. Summary of the Invention

[0004] The present invention provides a button that can be quickly installed and avoids interference between components during installation while maintaining good optical sensor performance.

[0005] To achieve the above-mentioned advantages, one embodiment of the present invention provides a button installed in a first through-hole of a plate body. The button includes a front frame, an optical switch module, and a fixing ring. The front frame includes a second through-hole, an outer flange, a positioning portion, and a receiving groove. The axial direction of the second through-hole is the same as the axial direction of the first through-hole, and the outer flange is installed at the front end of the second through-hole and surrounds the second through-hole. The positioning portion is installed in the second through-hole and located between the front end and the rear end of the second through-hole, and the positioning portion has a contact surface facing the rear end. The receiving groove is provided on at least one side wall surface of the front frame. The optical switch module is connected to the front frame and includes a substrate, a light-emitting element, and an optical trigger switch, where one of the light-emitting element and the optical trigger switch is mounted on the substrate and the other is mounted in the receiving groove. The fixed ring is fitted to the rear end and includes an inner ring, an outer ring, and a connecting part connecting the outer ring and the inner ring. The inner ring, the outer ring, and the connecting part together surround an accommodating space that accommodates the rear end when the fixed ring and the front frame are connected. The inner ring presses against the substrate to compress the contact surface, and the outer ring and the outer flange sandwich the plate body.

[0006] In one embodiment, the distance between the end face of the outer ring and the outer flange is equal to the thickness of the plate.

[0007] In one embodiment, the button further comprises a gasket disposed between the base plate and the inner ring.

[0008] In one embodiment, a connecting member is provided on a wall surface of the inner ring facing the accommodation space, and the inner ring is connected to the rear end by the connecting member.

[0009] In one embodiment, the connecting member is a screw groove, and a screw thread is provided on the inner wall surface of the rear end.

[0010] In one embodiment, the button further comprises an optical imaging module mounted between the substrate and the front end to generate a stereoscopic optical image that is projected in front of the front end.

[0011] In one embodiment, the button further comprises a contact switch disposed on the substrate, and a pressing member disposed between the substrate and the front end, for pressing the contact switch.

[0012] In one embodiment, the first slot opening of the accommodating groove is located on the radially inner wall surface of the front frame, and is located between the front end and the positioning portion, close to the front end, and toward the center of the second through hole.

[0013] In one embodiment, the receiving groove is located on the radially outer wall surface of the front frame, and further includes a second slot opening located between the front end and the positioning portion.

[0014] From the above description, the button of the present invention has the advantage of being able to quickly complete installation because the electronic component (board) inside the button and the position of the button on the plate can be fixed simultaneously via the fixing ring having an outer ring and an inner ring during installation. Furthermore, by adding a gasket between the inner ring and the electronic component, the distance between the front end of the front frame and the outer ring can be changed, allowing the button to be installed on plates of different thicknesses. Furthermore, by installing a movable pressing member and a pressing switch inside the button, the button can function as both a contact switch and a non-contact switch.

[0015] In order to make the above and other objects, features and advantages of the present invention more clearly understandable, the following detailed description will be given with reference to the accompanying drawings, in which: [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is an exploded schematic view of a button in one embodiment. [Figure 2] FIG. 2 is a cross-sectional schematic view of the button of FIG. [Figure 3] FIG. 3 is an exploded schematic view of the button of FIG. 1 in combination with a gasket and attached to plates of different thicknesses. [Figure 4]FIG. 4 is a schematic cross-sectional view of the button in FIG. 3 combined with a gasket. DETAILED DESCRIPTION OF THE INVENTION

[0017] In the following text, terms used in the description of the embodiments of the present invention, such as "upper" and "lower," that indicate directions and positions are based on the directions and positions shown in the drawings. The above terms are merely for convenience in describing the present invention and are not intended to limit the present invention, and do not indicate or imply that the elements referenced must be constructed in a particular direction. Furthermore, terms such as "first" and "second" used in this specification or claims are used only to name elements or distinguish between different embodiments or scopes, and are not used to set upper or lower limits on the number of elements.

[0018] FIG. 1 is an exploded schematic view of a button according to one embodiment. FIG. 2 is a cross-sectional schematic view of the button of FIG. 1. Also, in FIG. 1, a front frame 3 is attached to a plate body 2. As shown in FIG. 1, the button 1 provided in this embodiment is installed in a first through-hole 21 of the plate body 2 and includes a front frame 3, an optical switch module 4, and a fixing ring 5. As shown in FIGS. 1 and 2, the front frame 3 includes a second through-hole 31, an outer flange 32, a positioning portion 33, and a receiving groove 34. The axial direction of the second through-hole 31 is the same as the axial direction of the first through-hole 21 (see the extension direction of axis A in FIG. 1), and the outer flange 32 is installed at a front end 311 of the second through-hole 31 and surrounds the second through-hole 31. The positioning portion 33 is installed in the second through-hole 31 and is located between the front end 311 (see FIG. 2 ) and the rear end 312 (see FIG. 2 ) of the second through-hole 31, and has a contact surface 331 facing the rear end 312. The accommodating groove 34 is provided on at least one side wall surface of the front frame 3 and is adjacent to the front end 311. The optical switch module 4 is connected to the front frame 3 and includes a substrate 40, a light-emitting element 41, and an optical trigger switch 42, one of which is mounted on the substrate 40 and the other is mounted in the accommodating groove 34 (in the embodiment illustrated in FIG. 2 , the light-emitting element 41 is mounted on the substrate, and the optical trigger switch 42 is mounted in the accommodating groove 34). The fixing ring 5 is fitted into the rear end 312 and includes an inner ring 51, an outer ring 52, and a connecting portion 53 connecting the outer ring 52 and the inner ring 51. The inner ring 51, the outer ring 52, and the connecting portion 53 together surround an accommodation space 54, which accommodates the rear end 312 when the fixed ring 5 and the front frame 3 are fitted together. The inner ring 51 presses against the substrate 40, compressing the contact surface 331, and the outer ring 52, together with the outer flange 32, sandwiches the plate body 2.

[0019] Specifically, the device using the button 1 of this embodiment is not particularly limited, and the plate 2 may be, for example, part of the housing of a certain part of a machine tool or an elevator panel. The shape of the first through-hole 21 in the plate 2 corresponds to the shape of the front frame 3, for example, but is not limited to this. The distance D between the end face of the outer ring 52 and the outer flange 32 is, for example, equal to the thickness T of the plate 2, and it is preferable that the thickness T of the plate 2 is thick enough to support the weight of the button 1. However, the distance D between the end face of the outer ring 52 and the outer flange 32 is not limited to this (see the embodiments in Figures 3 and 4 described below for details).

[0020] 2 and 3, in this embodiment, the front frame 3 accommodates electronic components (such as the light-emitting element 41) required for the button 1. In a specific structure, the front frame 3 is, for example, cylindrical, and the contour of the outer wall surface of the front frame 3 corresponds to, for example, the shape of the first through-hole 21, but is not limited thereto. The contour of the second through-hole 31 on the inner wall surface of the front frame 3 is, for example, a circular hole, but the contour shape of the second through-hole 31 is not particularly limited and can be adjusted based on the outer shape of the button 1.

[0021] 2, in this embodiment, the outer flange 32 is located at the front end 311 of the front frame 3 and surrounds the second through hole 31. The outer flange 32 extends, for example, along the radial direction of the axis A of the second through hole 31, in a direction away from the second through hole 31, and protrudes from the outer surface of another portion of the front frame 3 (for example, the rear end 312 or a portion between the front end 311 and the rear end 312). The specific contour of the outer flange 32 is not limited, and can be, for example, similar to the contour of the second through hole 31, or can be selected as needed.

[0022] As shown in FIGS. 1 and 2 , in this embodiment, the second through-hole 31 includes a first tube 31A and a second tube 31B that communicate with each other and have different inner diameters. The first tube 31A is located in a portion of the front frame 3 close to the front end 311, and the second tube 31B is located in a portion of the front frame 3 close to the rear end 312. The inner diameter of the first tube 31A is smaller than that of the second tube 31B, and the first tube 31A provides a space for accommodating, for example, electronic components (e.g., light-emitting element 41) inside the button 1. The second tube 31B provides a space for accommodating, for example, the wiring of the button 1 and the inner ring 51 of the fixed ring 5. In this embodiment, the connection between the first tube 31A and the second tube 31B (where the inner diameter changes and has a stepped structure) forms the positioning portion 33, and the surface of this stepped structure facing the rear end 312 forms the contact surface 331. During installation, the substrate 40 enters the second through-hole 31 from the rear end 312 and is then pressed by the positioning portion 33 .

[0023] The specific structure of the second through hole 31 and its interior is not limited to the above example, and in other embodiments not shown, the second through hole 31 may be a cylinder with the same inner diameter, and the positioning portion 33 may be another well-known position limiting structure, such as a limiting block (not shown) protruding from the wall surface of the second through hole 31. Furthermore, since the position of the substrate 40 can be limited by the positioning portion 33, in embodiments not shown, the shape and size of the front end 311 of the second through hole 31 may be different from the shape and size of the rear end 312, and the shape of the substrate 40 can be changed as needed.

[0024] 2, in this embodiment, the receiving groove 34 is provided on at least one side wall surface near the front end 311 of the front frame 3. The receiving groove 34 is located, for example, at the front end 311 and includes a first slot opening 341 on the inner wall surface of the front frame 3 and a second slot opening 342 on the outer wall surface of the front frame 3. The second slot opening 342 allows the optical trigger switch 42 to enter the receiving groove 34 along the radial direction of the second through-hole 31, but the specific shape is not limited thereto. It should be understood that in embodiments not shown, the second slot opening 342 may not be provided. The axial direction of the first slot opening 341 is inclined, for example, with respect to the axial direction of the second through hole 31. Due to this structure, even after the button 1 of this embodiment is combined with the plate body 2, the first slot opening 341 of the accommodating groove 34 is not covered by the plate body 2, and when attaching a component (the optical trigger switch 42 in this embodiment) to the accommodating groove 34, it can be inserted into the accommodating groove 34 from the second slot opening 342 without passing through the first slot opening 341.

[0025] Regarding the specific structure of the optical switch module 4, as shown in FIGS. 1 and 2, in this embodiment, the substrate 40 is, for example, a printed circuit board, but is not limited thereto. During assembly, the substrate 40 is positioned between the first tube 31A and the second tube 31B, and the edge of the substrate 40 contacts the contact surface 331 of the positioning portion 33. The light-emitting element 41 is, for example, mounted on the substrate 40 and faces the front end 311. The light beam emitted from the light-emitting element 41 is, for example, an infrared beam, but is not limited thereto. The optical trigger switch 42 is, for example, mounted in the receiving groove 34 and detects the light beam generated by the light-emitting element 41 reflected by the user's finger. The wavelength of the light beam detected by the optical trigger switch 42 corresponds to the wavelength of the light beam generated by the light-emitting element 41. When a user's finger (not shown) approaches the button 1, a light beam emitted from the light-emitting element 41 is reflected by the finger, enters the receiving groove 34 through the first slot opening 341, and triggers the optical trigger switch 42. After the optical trigger switch 42 is triggered, an operation signal is generated to operate, for example, a device (not shown). However, the specific positions and types of the light-emitting element 41 and the optical trigger switch 42 are not limited to these.

[0026] Regarding the specific structure of the fixed ring 5, in this embodiment, the inner ring 51 is, for example, a circular ring corresponding to the shape of the inner wall surface of the second through hole 31, and is used to pass a conductor (not shown) connected to the substrate 40. A central annular opening 510 of the inner ring 51 is used to pass, for example, a wiring (not shown) connected to the substrate 40. The height of the inner ring 51 (height along the axis A or the extension direction of the fixed ring 5) is greater than, for example, the distance from the rear end 312 to the substrate 40 (see FIG. 2). When the fixed ring 5 is connected to the front frame 3, the substrate 40 is pressed against the inner ring 51 and comes into contact with the contact surface 331. A connecting member 511 is provided on the wall surface facing the accommodation space 54, and the inner ring 51 is connected to the rear end 312 of the front frame 3 via this connecting member 511. As shown in FIGS. 1 and 2, the connecting member 511 is, for example, a screw groove, and a thread corresponding to the screw groove is provided on the inner wall surface near the rear end 312 of the front frame 3.

[0027] The shape of the outer ring 52 corresponds to, for example, the shape of the inner ring 51, but is not limited to this. The height of the outer ring 52 (height along the extension direction of the fixed ring 5) corresponds to, for example, the distance from the rear end 312 to the plate body 2, and is greater than the height of the inner ring 51. There are no particular limitations on the structure of the connecting portion 53, and it is sufficient if it can connect both the inner ring 51 and the outer ring 52 and form an accommodation space 54 between the inner ring 51 and the outer ring 52 for accommodating the rear end 312 of the front frame 3.

[0028] With the above-described structure, when the front frame 3 and the fixed ring 5 are connected, the distance between the outer ring 52 and the outer surface of the front frame 3 can be increased via the connecting portion 53, so that the connection structure between the front frame 3 and the fixed ring 5 does not affect the shape of the outer surface of the front frame 3 (second through-hole 31), and it is possible to prevent the outer ring 52 from affecting the design of the accommodating groove 34 or the components within the accommodating groove 34. Furthermore, once the installation of the fixed ring 5 is complete, the positioning between the substrate 40 and the front frame 3 and between the front frame 3 and the plate body 2 is simultaneously completed.

[0029] In the above-described embodiment, the connecting member 511 is located on the inner ring 51, but since the inner ring 51 is connected to the outer ring 52 via the connecting portion 53, when the user attaches the button 1 to the plate body 2, the user can adjust the precise position of the inner ring 51 on the front frame 3 by grasping a part of the outer ring 52. Furthermore, since the connecting member 511 is located within the accommodation space 54, it is protected by the inner ring 51, the outer ring 52, the connecting portion 53, etc.

[0030] Furthermore, the type of connecting member 511 is not limited to the above-mentioned threads or screw grooves, and in embodiments not shown, the connecting member 511 on the inner ring 51 can be changed to, for example, a spring with a bump. Also, a locking groove or locking hole corresponding to the positions of the spring and bump can be provided on the inner wall surface of the front frame 3, for example, near the rear end 312. Furthermore, since the outer ring 52 mainly serves to fix the front frame 3 to the plate body 2, in other embodiments not shown, the shape of the outer ring 52 can be changed to other shapes as needed, and can be similar to or different from the shape of the inner ring 51.

[0031] As shown in FIGS. 1 and 2 , in this embodiment, the button 1 includes a light-emitting unit 60 and an optical imaging module 61. The light-emitting unit 60 is, for example, mounted on the substrate 40 and is, for example, a light-emitting diode. The wavelength range of the light beam generated by the light-emitting unit 60 is, for example, within the wavelength range of visible light. The optical imaging module 61 is mounted between the optical switch module 4 and the front end 311 and covers the light-emitting unit 60 and the light-emitting element 41. The optical imaging module 61 converts the light beam generated by the light-emitting unit 60 into a stereoscopic optical image (not shown) that is projected in front of the front end 311. There is no particular limitation on the type relationship between the light-emitting unit 60 and the light-emitting element 41. Therefore, in other embodiments, the light-emitting element 41 can also be used as the light-emitting unit 60 depending on the type of optical trigger switch 42.

[0032] 2, the optical imaging module 61 sequentially includes, for example, a front cover 611, a lens array 612, a pattern layer 613, and a collimator 614, but is not limited thereto. The front cover 611 is, for example, a light-transmitting member, and the periphery of the front cover 611 is provided with a plurality of locking blocks 611A for fixing components such as the lens array 612, the pattern layer 613, and the collimator 614. As shown in FIGS. 1 and 2, the locking blocks 611A are provided with protruding rails 611B, and the inner wall surface of the first barrel 31A is provided with slide grooves 313 corresponding to the shape of the protruding rails 611B. This allows the optical imaging module 61 to slide within the first barrel 31A along the extension direction of the axis A, and move closer to or farther away from the substrate 40.

[0033] The collimating section 614 is provided on the side of the optical imaging module 61 facing the light emitting unit 60, and converts the light beams generated by the light emitting unit 60 and traveling in various directions into a collimated light beam that is emitted approximately parallel to the extension direction of the axis A of the second through hole 31. Specifically, the collimating section 614 is, for example, a Fresnel lens, but is not limited to this.

[0034] The pattern layer 613 is covered on the collimating portion 614 and generates an optical pattern, and is composed of, for example, but not limited to, a light-transmitting layer having a pattern or a light-shielding layer having patterned openings. The lens array 612 is provided between the pattern layer 613 and the front cover 611 and includes, for example, a plurality of microlenses (not shown), and converts the light beams passing through the pattern layer 613 into a stereoscopic optical image.

[0035] As described above, in this embodiment, the light emitting element 41 is mounted on the substrate 40 and covered by the optical imaging module 61, so that the light beam generated by the light emitting element 41 can pass through the collimator portion 614, which avoids the problem of the light beam being difficult to reflect at the position in front of the button 1 due to the angle, and improves detection accuracy. However, the positions of the light emitting element 41 and the optical trigger switch 42 are not limited to this and can be interchanged.

[0036] 1 and 2, in this embodiment, the button 1 further includes, for example, a contact switch 71 and a pressing member 72. The contact switch 71 is, for example, a tact switch or other known contact switch. The contact switch 71 is, for example, disposed on the substrate 40 (or located near the light-emitting unit 60).

[0037] The pressing member 72 is, for example, a housing that covers the contact switch 71, but is not limited to this. As shown in FIG. 1 , the pressing member 72 has an opening 720 for passing light beams generated by the light-emitting elements 41 and the light-emitting units 60 on the substrate 40. The pressing member 72 has, for example, elastic arms 721 on its outer surface that extend toward the plurality of substrates 40. The pressing member 72 presses the substrates 40 via the elastic arms 721, forming a gap G between one end of the pressing member 72 that is close to the substrates 40 and the contact switch 71 on the substrate 40. The other end of the pressing member 72 presses the optical imaging module 61, and maintains a certain gap from the substrate 40 when the optical imaging module 61 is not pressed.

[0038] In this embodiment, when the user presses the front cover 611, the optical imaging module 61 moves toward the board 40, the shape of the elastic arm 721 changes, the gap G is reduced, and then the pressing member 72 indirectly presses the contact switch 71 on the board 40, causing the contact switch 71 to generate a control signal. That is, the button 1 in this embodiment also functions as a contact button.

[0039] In an embodiment not shown, by changing the shape, type, or installation position of the contact switch 71, the optical imaging module 61 can directly function as the pressing member 72, and by installing an elastic member such as a spring on the substrate 40, it is not necessary to install an elastic arm 721.

[0040] FIG. 3 is an exploded schematic diagram of the button of FIG. 1 combined with a gasket and attached to a plate of a different thickness. FIG. 4 is a cross-sectional schematic diagram of the button of FIG. 3 combined with a gasket. Referring to FIGS. 3 and 4, in this embodiment, the button 1 can be further combined with a gasket 8 and attached to a plate 201 of a different thickness than the plate 2. The gasket 8 is installed, for example, within the second tube 31B and contacts the base 40 and the inner ring 51. Because the inner ring 51 is connected to the outer ring 52 via the connecting portion 53, changing the distance between the base 40 and the inner ring 51 using the gasket 8 changes the distance D2 between the outer ring 52 and the outer flange 32, which is equal to the sum of the distance D and the thickness of the gasket 8. In other words, the same button 1 can be attached to a plate 201 of a different thickness T2 without structural changes, whether combined with a different gasket 8 or without using a gasket 8.

[0041] From the above description, the button of the present invention has the advantage of being able to quickly complete installation because the electronic component (board) inside the button and the position of the button on the plate can be fixed simultaneously via the fixing ring having an outer ring and an inner ring during installation. Furthermore, by adding a gasket between the inner ring and the electronic component, the distance between the front end of the front frame and the outer ring can be changed, allowing the button to be installed on plates of different thicknesses. Furthermore, by installing a movable pressing member and a pressing switch inside the button, the button can function as both a contact switch and a non-contact switch.

[0042] Although the present invention has been disclosed using examples, the present invention is not limited thereto. Those skilled in the art may make some modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is limited by the appended claims. [Explanation of symbols]

[0043] 1: Button 2, 201: Plate 21: First through hole 3: Previous frame 31: Second through hole 31A: 1st tube 31B: 2nd cylinder 311: Front end 312: Rear end 313: Slide groove 32: Outer flange 33: Positioning unit 331: Contact surface 34: Storage groove 341: First slot opening 342: Second slot opening 4: Optical switch module 40: Circuit board 41: Light-emitting element 42: Optical trigger switch 5: Fixed ring 51: Inner Ring 510: Annular opening 511: Connection member 52: Outer ring 53: Connection 54: Storage space 60: Lighting unit 61: Optical imaging module 611: Front cover 611A: Locking block 611B: Convex rail 612: Lens array 613: Pattern layer 614: Collimation part 71: Contact switch 72: Pressing member 720:Aperture 721: Elastic arm 8: Gasket D, D2: distance T, T2: Thickness A: Axial center G: Spacing

Claims

1. The plate is installed in the first through hole, a front frame including a second through hole, an outer flange, a positioning portion, and an accommodating groove, wherein the axial direction of the second through hole is the same as the axial direction of the first through hole, the outer flange is installed at a front end of the second through hole and surrounds the second through hole, the positioning portion is installed within the second through hole and is located between the front end and a rear end of the second through hole, and the positioning portion has a contact surface facing the rear end, and the accommodating groove is provided on at least one side wall surface of the front frame; an optical switch module connected to the front frame, the optical switch module including a substrate, a light-emitting element, and an optical trigger switch, one of the light-emitting element and the optical trigger switch being mounted on the substrate and the other being mounted in the receiving groove; a fixed ring fitted onto the rear end and including an inner ring, an outer ring, and a connecting portion connecting the outer ring and the inner ring, the inner ring, the outer ring, and the connecting portion together surrounding an accommodating space, the accommodating space accommodating the rear end when the fixed ring and the front frame are connected, the inner ring pressing against the substrate to compress the contact surface, and the outer ring sandwiching the plate body together with the outer flange; A button comprising:

2. 2. The button according to claim 1, wherein the distance between the end face of the outer ring and the outer flange is equal to the thickness of the plate.

3. The button according to claim 1 , further comprising a gasket disposed between the base plate and the inner ring.

4. The button according to claim 1 , wherein a connecting member is provided on a wall surface of the inner ring facing the storage space, and the inner ring is connected to the rear end by the connecting member.

5. 5. The button according to claim 4, wherein the connecting member is a screw groove, and the front frame has a screw thread on an inner wall surface near the rear end.

6. The button of claim 1 , further comprising an optical imaging module mounted between the base and the front end to generate a stereoscopic optical image that is projected in front of the front end.

7. The button according to claim 1 , further comprising: a contact switch disposed on the substrate; and a pressing member disposed between the substrate and the front end, for pressing the contact switch.

8. The button according to claim 1 , wherein the receiving groove is located on the inner wall surface of the front frame, and has a first slot opening located between the front end and the positioning portion.

9. The button according to claim 1 , wherein the receiving groove is located on the outer wall surface of the front frame, and includes a second slot opening located between the front end and the positioning portion.

Images