TWI427655B - Key device - Google Patents

Description

Button device

The present invention relates to a button device, and more particularly to a structural improvement of a button device.

Referring to FIG. 1, a button structure of a computer keyboard generally includes a base 91, a circuit unit 92 disposed on the base 91, a keycap 93, and a support link 94 disposed between the circuit unit 92 and the keycap 93. And a contact member 95, wherein the bottom of the support link 94 is rotatably connected to the base 91, and the connection relationship between the bottom of the support link 94 and the base 91 is usually a shaft (shaft member)-hole (hole) Cooperating, and the shaft holes are usually matched by the clearance. Therefore, when the entire button structure is subjected to external vibration, touch or pressing, the shaft member is more likely to generate noise when it is operated in the hole.

Accordingly, it is an object of the present invention to provide a key device that can reduce noise generated by vibration, touch or pressing between shaft-hole fittings.

Therefore, the button device of the present invention comprises a substrate, a circuit unit, a keycap, a contact element and a support rod. The substrate has a plate body and a hole block. The plate body has a top surface. The hole block is connected to the top surface of the plate body and forms a laterally extending through hole. The circuit unit is disposed on a top surface of the board body of the substrate and includes a plurality of layer structures and a movable tongue formed by one of the structures and spaced apart from the top surface of the substrate board body, and the movable tongue has a adjacent The end of the socket. The key cap is located above the circuit unit. The contact element is provided under the keycap as a flexible material. The support rod has a first rod portion and a second rod portion connected to each other, the first rod portion is pivotally disposed on the key cap, and the second rod portion is disposed through the through hole of the hole seat, the movable tongue piece Located below the second rod portion and the end portion abuts the second rod portion to support the second rod portion to contact the hole holder upward.

The button device of the present invention comprises a substrate, a body, a contact element, a keycap and a support rod. The substrate has a plate body and a hole seat. The plate body has a top surface connected to the top surface of the plate body and defining a laterally extending through hole. The sheet is disposed on the substrate and is formed with a movable tongue spaced above the top surface of the substrate body, the movable tongue having an end adjacent to the socket. The contact member protrudes from the sheet. The keycap is disposed on the contact element. The support rod has a first rod portion and a second rod portion connected to each other, the first rod portion is pivotally disposed on the key cap, and the second rod portion is disposed through the through hole of the hole seat, the movable tongue piece Located below the second rod portion and the end portion abuts the second rod portion to support the second rod portion to contact the hole holder upward.

The utility model has the advantages that the movable tongue is supported under the second rod portion of the support rod, and the second rod portion abuts against the hole seat to eliminate the gap between the second rod portion and the bottom edge of the socket, thereby further It is possible to prevent the second rod from frequently hitting the bottom edge of the socket to generate noise.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of FIG.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

The button device of the present invention may be a button device of a computer keyboard, but is not limited thereto. It may also be a button of another electronic device, a numeric keypad, etc., and for convenience of illustration and description, in the following embodiments, Referring to FIG. 2 and FIG. 3, the first preferred embodiment of the button device 100 of the present invention comprises a substrate 1, a circuit unit 2, a support rod 3, and a key cap. 4 and a touch element 5, of course, the button device 100 may also comprise other support elements or members (not shown), such as scissors elements.

The substrate 1 includes a board body 11 and a plurality of sockets 12. The board body 11 has a top surface 111. Each of the sockets 12 is connected to the top surface 111 of the board body 11 and defines a laterally extending through hole 121. The extension means that the extending direction D2 of the through hole 121 is substantially in the direction of the top surface 111 of the parallel plate body 11.

In the present embodiment, the socket 12 is formed by partially stamping the plate body 11 into a U-shape and bending upward to form an inverted U-shaped structure 122. The inverted U-shaped structure 122 defines the aforementioned through holes 121, and each The inverted U-shaped structure 122 has a bottom edge 123 (see FIG. 7) that defines the through hole 121.

Referring to FIG. 3, FIG. 4 and FIG. 7, the circuit unit 2 is disposed on the top surface 111 of the board body 11 of the substrate 1 and includes a plurality of layer structures and a plurality of movable tongues formed on one of the structures spaced apart from the top surface 111 of the board body 11. In this embodiment, the layer structure includes a first circuit layer 21, a second circuit layer 22 above the first circuit layer 21, and a combination between the first circuit layer 21 and the second circuit layer 22. The spacer layer 23, the second circuit layer 22, the spacer layer 23 and the first circuit layer 21 are stacked on top of each other. In the embodiment, the first circuit layer 21, the second circuit layer 22, and the spacer layer 23 Both of the top surface of the first circuit layer 21 and the bottom surface of the second circuit layer 22 are provided with circuits (not shown), and the contact element 5 is disposed on the top surface of the second circuit layer 22, and is pressed. The material of the component 5 is, for example, silicone. When the pressing component 5 is pressed downward, the region of the second circuit layer 22 under the contact element 5 can be pressed directly under the contact element 5 with the first circuit layer 21. The areas are in contact to form an electrical connection.

The movable tongues 24 are formed in one of the structures of the circuit unit 2 and as shown in FIG. 7, when the circuit unit 2 is disposed on the top surface 111 of the board body 11 of the substrate 1, the movable tongues 24 are spaced apart from the board body. 11 above the top surface 111, and each of the movable tongues 24 has an end portion 241. In the embodiment, the movable tongues 24 are formed by the second circuit layer 22 on both sides of the touch element 5 respectively. An opening 221 and a pair of parallel and coherent ends communicate with the first groove 222 of the first opening 221, and the first groove 222 and the first opening 221 communicate with each other are substantially U-shaped, each pair first The movable tongue 24 is defined between the grooves 222 to form an elongated strip. In other words, the movable tongue 24 is actually formed as a partial area of the second circuit layer 22, and as shown in FIG. 3, the movable tongue The projection direction D1 of the second circuit layer 22 is parallel to the direction D2 in which the through hole 121 extends, and the end portion 241 of the movable tongue 24 referred to above is the free end thereof.

The spacer layer 23 is respectively formed with a third trench 232 corresponding to a region below each of the movable tabs 24, and the spacer layer 23 is further formed with a third opening 231 communicating with one end of the third trench 232, and a third opening communicating with each other. 231 and the third groove 232 are substantially T-shaped in outline. The first circuit layer 21 is formed with a second trench 212 corresponding to a region below the movable tab 24, and the first circuit layer 21 is further formed with a second opening 211 communicating with one end of the second trench 212. The second opening 211 and the second groove 212 are substantially T-shaped in outline. When the second circuit layer 22 and the spacer layer 23 are overlapped with the first circuit layer 21, each movable tongue 24 can be deformed up and down due to the space provided by the lower second groove 212 and the third groove 232. The first opening 221, the second opening 211, and the third opening 231 are correspondingly connected to each other to define a hollowed out area 20, and the circuit unit 2 is two hollowed out on both sides of the touch element 5. The region 20 is disposed on the two-hole base 12 of the substrate 1 and is disposed on the top surface 111 of the plate body 11 of the substrate 1, so that the positions of the two movable tongues 24 respectively correspond to the two-hole seats 12, and the ends of each movable tongue piece 24 The portion 241 faces the through hole 121 adjacent to the socket 12 .

Referring to FIG. 3 and FIG. 5 to FIG. 7 , the support rod 3 is substantially U-shaped and has a first rod portion 31 and two second rod portions 32 extending from opposite ends of the first rod portion 31 in the same direction. The support rod 3 is a balance rod for supporting the larger size keycap 4, but the support rod 3 may also be one of the support rods of the scissors element. Each of the second rod portions 32 has a head portion 320 connecting the first rod portion 31 and a final portion 321 connecting the head portion 320. The first rod portion 31 of the support rod 3 is pivoted at the bottom of the keycap 4, and the second portion The end portions 321 of the rod portions 32 are respectively disposed on the through holes 121 of the two holes 12 of the substrate 1 and are respectively located on both sides of the touch element 5, and at this time, the key cap 4 is touched on the top of the touch element 5 The support of the pressing element 5, in other words, the contact element 5 is located below the keycap 4 between the keycap 4 and the circuit unit 2. When the keycap 4 is not subjected to the downward pressing force, the two second rod portions 32 are inclined, and when the key cap 4 is pressed downward, the pressing member 5 is pressed and the key cap 4 and the support rod 3 are pressed. The first rod portions 31 are all adjacent to the circuit unit 2 downward, and when the downward pressing force disappears, the key cap 4 is moved upward away from the circuit unit 2 by the elastic restoring force of the contact member 5.

It should be noted that, in this embodiment, by the arrangement of the movable tongues 24, when the support rod 3 is assembled and coupled between the keycap 4 and the substrate 1, the two movable tongues 24 are located at the two second rods. Below the portion 32, and the end portion 241 of each movable tongue 24 abuts against the end portion 321 of each second rod portion 32. Since the movable tongue piece 24 is made of PET, it has flexibility and also has A certain degree of rigidity, therefore, when the end portion 241 of the movable tongue 24 abuts against the end portion 321 of the second rod portion 32, the second rod portion 32 can be supported upward, so that the second rod portion 32 is in contact with The hole 12 is inverted with the bottom edge 123 of the U-shaped structure 122. Thus, the gap between the second rod portion 32 and the bottom edge 123 of the inverted U-shaped structure 122 can be eliminated, thereby preventing the button device 100 from being shaken by an external force. The rod portion 32 frequently hits the bottom edge 123 of the inverted U-shaped structure 122 to generate low-frequency noise. In addition, since the movable tongue piece 24 has a generally cantilever-like structure, when the second rod portion 32 is pressed due to pressure When displaced, the movable tongue 24 can also be deformed downward as the second stem portion 32 moves downward, without affecting the mobility of the second stem portion 32.

In the first preferred embodiment, the support rod 3 is U-shaped and includes a first rod portion 31 and two second rod portions 32, but the structure of the support rod 3 may also be only the second rod portion 32 of FIG. The parts are respectively located on the two sides of the keycap 4. At this time, the first rod portion and the second rod portion of the support rod are respectively pivotally connected to the key cap 4 and the second rod portion 32 of FIG. At both ends of the through hole 121 of the socket 12, for example, the head section 320 and the end section 321 are provided.

Referring to FIG. 8, in the first preferred embodiment, the first variation of the movable tongues is different from that of FIG. 4 in that, in FIG. 8, the first groove formed in the second circuit layer 29 is formed. The slot 292 is generally L-shaped and has one end in communication with the first opening 293. The first groove 292 cooperates with the first opening 293 to define a movable tab 291, and the movable tab 291 protrudes relative to the second circuit layer 29. The direction D3 is perpendicular to the extending direction D4 of the through hole 121, the free ends of the two movable tongues 291 face each other, and the free end of the movable tongue 291 faces the first groove 292, and the aforementioned movable tongue 291 end The portion 290 refers to a side end of the movable tongue 291 facing the first opening 293.

The lower spacer layer 23 and the first circuit layer 21 are respectively provided with openings 233 and 213 at positions corresponding to the lower portion of the movable tongue 291, and the movable tongue 291 is provided with a space which is deformed downward by pressure.

In the case where the movable tongue 291 is the same as that of FIG. 8, referring to FIG. 9, the second rod portion 33 of the support rod 3' may also be L-shaped, in other words, the head portion 330 of the second rod portion 33 is The end sections 331 are connected in an L shape, and the end sections 331 of the two second rod portions 33 face each other.

And corresponding to the structural change of the support rod 3', the extending direction D5 of the through hole 131 of the base 13 of the substrate 1' is parallel to the protruding direction D3 of the movable tongue 291, that is, the base 1' of the base of FIG. The extending direction D5 of the through hole 131 of 13 is rotated by 90 degrees compared with the extending direction D4 of the through hole 121 of the substrate 1 of the substrate 1 of FIG. 8 to change the direction of the end portion 331 of the second rod portion 33, thereby making the support rod The end portions 331 of the two second rod portions 33 of 3' can also be passed through the through holes 131 of the two-hole holder 13.

When the support rod 3' is assembled and coupled to the base 1', the movable tongue 291 can also abut against the end portion 331 of the second rod portion 33 with its end portion 290, achieving the same effect as described above.

Referring to FIG. 10, a second variation of the movable tongue of the first preferred embodiment is different from that of FIG. 8 in that, in FIG. 10, the first trench 252 of the second circuit layer 25 is formed. The direction of the first groove 292 is opposite to the direction of the first groove 292 of FIG. 8, such that the free ends of the two movable tongues 251 are opposite to each other, and the end portion 250 of the movable tongue 251 is referred to as the movable tongue 251 facing the first opening. One side of 253.

Referring to FIG. 11 and FIG. 12, a second preferred embodiment of the button device 101 of the present invention is different from the first preferred embodiment shown in FIG. 4 in that in the second preferred embodiment, the active tongues are The sheet 28 is connected to the spacer layer 27, in other words, the movable tongue 28 is formed by the spacer layer 27 on both sides of the contact member 5 respectively provided with a first opening 271 and a pair of parallel and the same end are connected to the first The first trench 272 of the opening 271, the first trench 272 and the first opening 271 are substantially U-shaped, and the movable tab 28 is defined between each pair of trenches 272. The second circuit layer 26 is formed with a third trench 262 corresponding to the upper portion of each of the movable tabs 28, and the second circuit layer 26 is further formed with a third opening 261 that communicates with one end of the third trench 262. The third groove 262 and the third opening 261 are substantially T-shaped. When the first circuit layer 21 and the second circuit layer 22 are overlapped with the spacer layer 23, the movable tongue 28 is the third groove 212 of the first circuit layer 21 and the third groove of the second circuit layer 26. Between the grooves 262, by the space provided by the first groove 212, the movable tongue 28 is also spaced above the top surface 111 of the plate body 11 of the substrate 1, and the end portion 281 of the movable tongue 28 abuts the second Below the stem 32, the second stem 32 is supported upwardly against the bottom edge 123 of the socket 12. Of course, since the movable tongue 28 of FIG. 12 is lower in height than the movable tongue 24 of FIG. 4, the length of the movable tongue 28 will be slightly longer than the movable tongue 24 of FIG. 4, which is sufficient for the second portion. The upper support 32 is in contact with the bottom edge 123 of the socket 12.

The structure of the movable tongue 28 formed in the spacer layer 27 of the second preferred embodiment may also be as shown in Figs. 8 and 10.

Referring to FIG. 13 and FIG. 14 , a third preferred embodiment of the present invention is different from the first preferred embodiment of FIG. 4 in that the button device 102 of the third preferred embodiment further includes a body 6 (for example, For the light shielding sheet or the rubber sheet, the button device 102 may also include a plurality of sheets which are respectively a light shielding sheet and a rubber sheet.

The sheet body 6 can be disposed on the circuit unit 7 and interposed between the circuit unit 7 and the keycap 4, and the touch element 5 is formed by the sheet body 6 integrally formed upwardly (in other embodiments). The touch element 5 may be separately disposed on the sheet body 6 or the circuit unit 2, and the sheet body 6 is respectively disposed on both sides of the touch element 5 with a first opening 61 and a pair of parallel and opposite ends. The first trench 62, which communicates with the first opening 61, is substantially U-shaped, and the first opening 61 defines a movable tongue 63 between each pair of first trenches 62. The first circuit layer 71, the second circuit layer 72, and the spacer layer 73 of the circuit unit 7 respectively form a fourth trench 712, 722, 732 corresponding to a region below each of the movable tongues 63, and the first Each of the circuit layer 71, the second circuit layer 72, and the spacer layer 73 is further formed with a fourth opening 711, 721, 731 that communicates with one end of the fourth trench 712, 722, 732, and a fourth trench 712 that communicates with each other. The contours of 722, 732 and fourth openings 711, 721, and 731 are substantially T-shaped. When the first circuit layer 71, the second circuit layer 72, and the spacer layer 73 of the circuit unit 7 are stacked and overlapped, the first side is on the same side. The four grooves 712, 722, and 732 are correspondingly connected to the fourth openings 711, 721, and 731, and the fourth grooves 712, 722, and 732 corresponding to the lower portions of the movable tongue 63 cooperate to define a recessed space for The movable tongue 63 has a space that is deformed downward as the second rod portion 32 is pressed down.

In other words, in the third preferred embodiment, the movable tab 63 is not formed on the circuit unit 7, but is formed on the sheet 6 (for example, a light shielding sheet or a rubber sheet) located above the circuit unit 7, when the support rod 3 is When the assembly is coupled between the keycap 4 and the substrate 1, the end portion 631 of each movable tongue 63 abuts against each of the second rod portions 32, and supports the second rod portion 32 upwardly and against the socket The inverted bottom edge 123 of the U-shaped structure 122 eliminates the gap between the second rod portion 32 and the bottom edge 123 of the inverted U-shaped structure 122, thereby preventing the second rod portion 32 from being shocked, touched or pressed by the external force of the button device 102. Frequently impacting the bottom edge 123 of the inverted U-shaped structure 122 to generate low frequency noise, the circuit unit 7 is provided by the fourth groove 712, 722, 732 for the movable tongue 63 along with the second shank 32 goes down and deforms.

Of course, in the third preferred embodiment of FIG. 13 and FIG. 14, the structure of the movable tongue 63 formed by the sheet body 6 may also be as shown in FIGS. 8 and 10.

In summary, the present invention is formed by the movable tongues 24, 251, 28, 291, 63 so as to be supported by the second rod portion 32 of the support rod 3 so that the second rod portion 32 abuts against the hole. The seat 12 eliminates the gap between the second rod portion 32 and the bottom edge 123 of the socket 12, thereby preventing the second rod portion 32 from frequently hitting the bottom edge 123 of the socket 12 to generate noise, so that the present invention can be achieved. The purpose. Furthermore, the technique of the movable tongues 24, 251, 28, 291, 63 of the present invention supported on the support bar 3 can also be utilized to support the shaft-hole fit of any of the support links 94 as shown in FIG. The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

100. . . Button device

101. . . Button device

102. . . Button device

1, 1’. . . Substrate

11. . . Board body

111. . . Top surface

12. . . Hole seat

121. . . Through hole

122. . . Inverted U-shaped structure

123. . . Bottom edge

2. . . Circuit unit

twenty one. . . First circuit layer

211. . . Second groove

212. . . Second opening

213. . . Opening

twenty two. . . Second circuit layer

221. . . First opening

222. . . First groove

twenty three. . . Spacer

231. . . Third groove

232. . . Third opening

233. . . Opening

twenty four. . . Movable tongue

241. . . Ends

25. . . Second circuit layer

251. . . Movable tongue

252. . . First groove

26. . . Second circuit layer

261. . . Third groove

262. . . Third opening

27. . . Spacer

271. . . First opening

272. . . First groove

28. . . Movable tongue

29. . . Second circuit layer

290. . . Ends

291. . . Movable tongue

292. . . First groove

293. . . First opening

3. . . Support rod

31. . . First pole

32. . . Second pole

320. . . Header

321. . . End

4. . . keycap

5. . . Touching element

6. . . Sheet

61. . . First opening

62. . . First groove

63. . . Movable tongue

71. . . First circuit layer

711. . . Fourth groove

712. . . Fourth opening

72. . . Second circuit layer

721. . . Fourth groove

722. . . Fourth opening

73. . . Spacer

731. . . Fourth groove

732. . . Fourth opening

D1, D3. . . Movable tongue protruding direction

D2, D4, D5. . . Through hole extension direction

1 is a cross-sectional view showing a key structure of a conventional computer keyboard;

Figure 2 is a perspective view of a first preferred embodiment of the key device of the present invention;

Figure 3 is an exploded view of the first preferred embodiment;

Figure 4 is an exploded view of a circuit unit of the first preferred embodiment;

Figure 5 is a perspective view of a keycap of the first preferred embodiment in combination with a support rod;

Figure 6 is a perspective view showing the support rod of the first preferred embodiment combined with a substrate;

Figure 7 is a longitudinal cross-sectional view of the first preferred embodiment;

Figure 8 is a first variation of the plurality of active tongues of the circuit unit in the first preferred embodiment;

Figure 9 is a variant of the support rod of the movable tongue in the state of Figure 8;

Figure 10 is a second variation of the plurality of movable tongues in the first preferred embodiment;

Figure 11 is an exploded perspective view of a second preferred embodiment of the button device of the present invention;

Figure 12 is a longitudinal cross-sectional view of the second preferred embodiment;

Figure 13 is an exploded perspective view showing a third preferred embodiment of the key device of the present invention;

Figure 14 is a longitudinal cross-sectional view of the third preferred embodiment.

1. . . Substrate

11. . . Board body

111. . . Top surface

12. . . Hole seat

121. . . Through hole

122. . . Inverted U-shaped structure

123. . . Bottom edge

2. . . Circuit unit

twenty one. . . First circuit layer

212. . . Second opening

twenty two. . . Second circuit layer

twenty three. . . Spacer

232. . . Third opening

twenty four. . . Movable tongue

241. . . Ends

32. . . Second pole

321. . . End

4. . . keycap

5. . . Touching element

Claims (13)

A button device comprising: a substrate having a plate body and a hole block, the plate body having a top surface, the hole block being connected to the top surface of the plate body and forming a laterally extending through hole; a circuit unit, setting a top surface of the substrate body of the substrate and including a plurality of layers and a movable tongue formed by one of the structures and spaced above the top surface of the substrate body, and the movable tongue has an end adjacent to the socket a keycap located above the circuit unit; a touch component disposed under the keycap for a flexible material; and a support bar having a first stem portion and a second stem portion connected thereto The first rod portion is pivotally disposed on the keycap, the second rod portion is disposed through the through hole of the hole seat, the movable tongue is located below the second rod portion and the end portion is in contact with the second rod portion The second rod portion is supported to be in contact with the socket. The button device of claim 1, wherein the layer structure comprises a first circuit layer, a second circuit layer above the first circuit layer, and a first circuit layer coupled to the first circuit layer a spacer layer between the second circuit layers, the second circuit layer being formed with at least one first trench, the first trench defining the movable tab, the first circuit layer corresponding to an area below the movable tab Forming a second trench, the spacer layer forming a third trench connecting the second trench corresponding to a region below the movable tab. The button device of claim 2, wherein the second circuit layer further defines a first opening that communicates with one end of the first trench, and the first circuit layer further forms a second trench a second opening at one end of the slot, the spacer layer further defines a third opening that communicates with one end of the third slot, and the first opening and the second opening are correspondingly connected to the third opening to define a hollow area. The circuit unit is sleeved on the hole by the hollowing area, so that the end of the movable tongue is adjacent to the hole seat. The button device of claim 3, wherein the second circuit layer is formed with two first trenches, and the first trenches of the first trenches communicate with the first opening, the first trenches The movable tongue is defined between the slots, and a protruding direction of the movable tongue is parallel to the extending direction of the through hole. The button device of claim 1, wherein the layer structure comprises a first circuit layer, a second circuit layer above the first circuit layer, and a first circuit layer coupled to the first circuit layer a spacer layer between the second circuit layers, the spacer layer is formed with at least one first trench, the first trench defines the movable tongue, and the first circuit layer is formed corresponding to a region below the movable tongue a second trench, the second circuit layer forming a third trench corresponding to a region above the movable tab. The button device of claim 5, wherein the spacer layer is further formed with a first opening that communicates with one end of the first trench, and the first circuit layer is further formed with a second end that communicates with the second trench a second opening, the second circuit layer further defines a third opening that communicates with one end of the third trench, and the first opening and the second opening are correspondingly connected to the third opening to define a hollow region. The circuit unit is sleeved on the hole by the hollowing area, so that the end of the movable tongue is adjacent to the hole seat. The button device of claim 6, wherein the spacer layer is formed with two first trenches, and the first trenches of the first trenches are connected to the first opening, and the first trenches are The movable tongue is defined, and a protruding direction of the movable tongue is parallel to the extending direction of the through hole. The button device of claim 3, wherein the first groove is L-shaped and cooperates with the first opening to define the movable tongue, and a protruding direction of the movable tongue It is perpendicular to the extending direction of the through hole. A button device comprising: a substrate having a plate body and a hole seat, the plate body having a top surface, the hole block being connected to the top surface of the plate body and defining a laterally extending through hole; Forming a movable tongue spaced above the top surface of the substrate body of the substrate, the movable tongue having an end adjacent to the socket; a contact element protruding from the body; a keycap, setting And a support rod having a first rod portion and a second rod portion connected to each other, wherein the first rod portion is pivotally disposed on the key cap, and the second rod portion is disposed in the hole a through hole of the seat, the movable tongue is located below the second rod portion and the end portion abuts against the second rod portion to support the second rod portion to contact the hole holder upward. The button device of claim 9, wherein the sheet body is provided with at least one first groove and a first opening that communicates with the first groove at one end, the first groove and the first opening The cooperation defines the active tongue. The button device of claim 10, wherein the first groove is substantially L-shaped. The button device of claim 10, wherein the sheet body is provided with a pair of first grooves, and the opposite ends of the pair of first grooves are in communication with the first opening, the first grooves The active tongue is defined by the cooperation. The button device of claim 9, further comprising a circuit unit disposed between the top surface of the board body and the sheet body, wherein the circuit unit has a recessed space formed below the movable tongue. The movable tongue has a space that can be deformed downward.