TWI771190B - Keyboard - Google Patents

Abstract

The present invention discloses a keyboard, which includes a base plate and a key module. The key module is disposed above the base plate and includes a plurality of key units. Each of key units includes a keycap, a first elastic arm, and a second elastic arm. The keycap has a bottom surface, a first side and a second side opposite to each other, and a third side and a fourth side opposite to each other. The first elastic arm includes a first fixing portion fixed at a position close to the fourth side. One end of the first elastic arm connects to the first side, and the first elastic arm extends from a position close to the third side toward the fourth side. The second elastic arm includes a second fixing portion fixed at a position close to the fourth side. One end of the second elastic arm connects to the second side, and the second elastic arm extends from a position close to the third side toward the fourth side. The other end of the second elastic arm connects to the adjacent first elastic arm.

Description

keyboard

The present invention relates to a keyboard, especially a thin keyboard.

In terms of current computer usage habits, the keyboard is one of the indispensable input devices. Both the computer itself and its peripheral products are developing towards the design concept of light, thin, short and small, and the keyboard has also changed from the early large structure to a thin keyboard. Thin keyboards usually use membrane circuit boards, also known as membrane keyboards. The main components of the thin keyboard include a bottom plate, a thin-film circuit board, a connector (such as a scissor-type connector), a reset component (such as a rubber elastic component), and a keycap, which can trigger the switch of the thin-film circuit board by pressing the keycap. . Since the pressing stroke of the thin keyboard is relatively low, the keycap can be directly guided to rise and fall relative to the bottom plate by the connecting piece, and the reset piece provides the force for the keycap to return to its original position.

At present, the manufacturing requirements for thin keyboards mainly focus on simplifying assembly procedures and reducing production costs. However, in the assembly of the conventional thin keyboard, each connecting element, reset element and keycap must be assembled to the bottom plate respectively, and there is still room for improvement in the manufacturing process. In addition, for the appearance of a thin keyboard, of course, there is a need to make the keyboard better and thinner. However, the arrangement of the reset member and the connecting member also limits the thickness of the keyboard.

In view of the above problems, the main purpose of the present invention is to provide a keyboard, which can solve the problems of complicated assembly steps and thinning of the conventional keyboard through the novel structural design of the key module.

In order to achieve the above object, the present invention provides a keyboard, which includes a bottom plate and a key module. The key module is arranged on the bottom plate, and the key module includes a plurality of key units. Each key unit includes a key cap, a first elastic arm, a second elastic arm and a trigger portion. The keycap has a bottom surface, an opposite first side and a second side, and an opposite third side and a fourth side. The first elastic arm includes a first fixing portion. One end of the first elastic arm is connected to the first side of the keycap, and extends from a position close to the third side toward the direction of the fourth side. The first fixing portion is fixed at a position close to the fourth side. The second elastic arm includes a second fixing portion. One end of the second elastic arm is connected to the second side of the keycap and extends toward the fourth side from a position close to the third side. The second fixing portion is fixed to the bottom plate and is close to the fourth side. The other end of the second elastic arm is mutually connected with the first elastic arm of the adjacent key unit.

According to an embodiment of the present invention, the first elastic arm includes a first starting end and a first end. The first starting end is connected to the first side of the keycap. The second elastic arm includes a second starting end and a second end. The second starting end is connected to the second side of the keycap. The second end is connected with the first end of the first elastic arm of the adjacent key unit.

According to an embodiment of the present invention, the first elastic arm includes a first starting end and a first end. The first starting end is connected to the first side of the keycap. The first fixing portion is located at the first end or between the first starting end and the first end. The second spring arm includes a second start end and a second end. The second starting end is connected to the second side of the keycap. The second fixing portion is located between the second starting end and the second end

According to an embodiment of the present invention, the first starting end is located at the junction of the first side and the bottom surface, and the second starting end is located at the junction of the second side and the bottom surface.

According to an embodiment of the present invention, the distance between the first starting end and the third side is less than or equal to 1/3 of the length of the first side. The distance between the second starting end and the third side is less than or equal to 1/3 of the length of the second side.

According to an embodiment of the present invention, the first elastic arm has at least two first bending parts, and the second elastic arm has at least two second bending parts.

According to an embodiment of the present invention, the first elastic arm has a first extension section located between the two first bending portions. The second elastic arm has a second extending section, which is located between the two second bending portions. The first extension section and part of the second extension section are parallel to the first side and the second side of the keycap, respectively.

According to an embodiment of the present invention, the first elastic arm further includes a first opening, and the second elastic arm further includes a second opening.

According to an embodiment of the present invention, a long axis of the first opening and the second opening are parallel to the first side and the second side, respectively.

According to an embodiment of the present invention, a circuit board is provided on the bottom plate, and the circuit board includes a plurality of trigger switches. Each keycap has a trigger portion, which is arranged on the bottom surface and corresponds to one of the trigger switches.

According to an embodiment of the present invention, the first fixing part and the second fixing part are fixed to the bottom plate.

According to an embodiment of the present invention, the keyboard further includes a frame disposed on the key module. The first fixing part and the second fixing part are fixed to the frame.

As mentioned above, the keyboard according to the present invention includes a bottom plate, a circuit board and a key module. The key module includes a plurality of key units, and each key unit includes a key cap, a first elastic arm, a second elastic arm and a trigger portion. One end of the first elastic arm is connected to the keycap, and a first fixing portion of the first elastic arm is fixed to the bottom plate. One end of the second elastic arm is connected to the keycap, and a second fixing portion of the second elastic arm is fixed to the bottom plate. With the structure of the first elastic arm and the second elastic arm, the keycap can be moved up and down without using a reset member, thereby reducing the overall thickness of the keyboard to achieve a lighter and thinner effect. At the same time, the cost saving effect can also be achieved by removing the conventional reset member. In addition, the other end of the second elastic arm is connected to the first elastic arm of the adjacent key units, so that the adjacent key units are connected to each other. Therefore, the key module can be manufactured by integral molding. After the key module is fabricated, it can also be assembled to the circuit board at one time, thereby reducing the assembling steps, so as to achieve the effect of facilitating the assembly process.

1, 1c: bottom plate

2, 2c: circuit board

21: Trigger switch

22: Holes

3, 3c: key module

30, 30a, 30b, 30c: key unit

31, 31a, 31b, 31c: keycaps

311, 311a, 311b: first side

312, 312b: second side

313: Third side

314, 314a: Fourth side

315: Underside

32, 32a, 32b, 32c: the first spring arm

321, 321a, 321b: the first starting end

322, 322a, 322b, 322c: the first fixing part

323, 323a, 323b: first end

324, 324a, 324b, 325, 325a, 325b, 326a, 326b: the first bending part

327b: first opening

328, 328a, 328b: first extension

33, 33a, 33b, 33c: the second spring arm

331: Second starting end

332, 332c: Second fixing part

333, 333a: second end

334, 335, 336: Second bending part

337b: Second opening

338, 338b: second extension

34: Trigger Department

4. 4c: Framework

41c: thermal melting point

D1, D2: distance

L1, L2: length

K1, K2: keyboard

W: width

FIG. 1 is a partial schematic diagram of a keyboard according to a first embodiment of the present invention.

FIG. 2 is an exploded schematic view of the keyboard shown in FIG. 1 .

FIG. 3 is a top view of the key module shown in FIG. 2 .

FIG. 4 is a bottom view of the key module shown in FIG. 2 .

FIG. 5 is a bottom view of the keyboard shown in FIG. 1 .

FIG. 6 is a schematic diagram of one of the key units shown in FIG. 3 .

FIG. 7 is a partial schematic diagram of a keyboard according to a second embodiment of the present invention.

In order to better understand the technical content of the present invention, preferred specific embodiments are given as follows.

1 is a partial schematic view of a keyboard according to a first embodiment of the present invention, FIG. 2 is an exploded schematic view of the keyboard shown in FIG. 1 , FIG. 3 is a top view of the key module shown in FIG. 2 , and FIG. 4 is shown in FIG. 2 The bottom view of the key module shown in FIG. 5 is a bottom view of the keyboard shown in FIG. 1 . Please refer to the aforementioned drawings for the following description. In this embodiment, the keyboard K1 includes a bottom plate 1 , a circuit board 2 , a key module 3 and a frame 4 . Wherein, a circuit board 2 is arranged on the base plate 1 . The circuit board 2 of this embodiment may be a thin-film circuit board, and includes a plurality of trigger switches 21 . In addition, the key module 3 is disposed on the bottom plate 1 , and the key module 3 of this embodiment is disposed on the circuit board 2 , and the frame 4 is disposed on the key module 3 . In this embodiment, the key module 3 includes a plurality of key units 30 , 30 a and 30 b , and the key unit 30 is used as an example for description below. Also, adjacent key units 30 are connected to each other, for example, the key units 30, 30a are connected to each other, and the key units 30a, 30b are connected to each other. Therefore, the key module 3 can be integrally formed to form a plurality of key units 30 at a time, and directly assembled to the circuit board 2 .

Please refer to FIG. 1 to FIG. 4 . Specifically, each key unit 30 in this embodiment includes a key cap 31 , a first elastic arm 32 , a second elastic arm 33 and a trigger Section 34. As shown in FIG. 3 , the keycap 31 has an opposite first side 311 and a second side 312 , an opposite third side 313 and a fourth side 314 , and a bottom surface 315 (as shown in FIG. 4 ). The keycap 31 of this embodiment is a quadrilateral structure, and has a first side 311 , a second side 312 , a third side 313 and a fourth side 314 , wherein the first side 311 and the second side 312 are opposite sides, and The third side 313 and the fourth side 314 are opposite sides. In this embodiment, the user presses each key unit 30 close to the fourth side 314 of the key cap 31 to operate each key unit 30 . When the user presses the key cap 31 , the first elastic arm 32 and the second elastic arm 33 drive the key cap 31 to face each other. The bottom plate 1 is lifted and lowered, but the present invention is not limited to this. In other embodiments, the user can also press each key unit 30 close to the third side 313 of the key cap 31 to operate.

One end of the first elastic arm 32 is connected to the first side 311 of the keycap 31 , and one end of the second elastic arm 33 is connected to the second side 312 of the keycap 31 . In other words, the first elastic arm 32 and the second elastic arm 33 are located on opposite sides of the keycap 31 respectively. Specifically, the first elastic arm 32 of this embodiment includes a first starting end 321 , a first fixing portion 322 (as shown in FIGS. 4 and 5 ) and a first end 323 . The first elastic arm 32 is connected to the first side 311 of the keycap 31 with a first starting end 321 . Similarly, the second elastic arm 33 includes a second starting end 331 , a second fixing portion 332 (as shown in FIG. 4 ) and a second end 333 . The second elastic arm 33 is connected to the second side 312 of the keycap 31 with a second starting end 331 .

In addition, the first starting end 321 is closer to the third side 313 , so that the first elastic arm 32 extends from a position close to the third side 313 toward the direction of the fourth side 314 . FIG. 6 is a schematic diagram of one of the key units 30 shown in FIG. 3 , please refer to FIG. 6 . Preferably, the distance D1 between the first starting end 321 and the third side 313 is less than or equal to 1/3 of the length L1 of the first side 311 . In other words, the length L1 of the first side 311 is greater than or equal to three times the distance D1 between the first starting end 321 and the third side 313 . The distance D2 between the corresponding second starting end 331 and the third side 313 is less than or equal to 1/3 of the length of the second side 312 .

Referring to FIGS. 3 , 4 and 5 , the first elastic arm 32 extends toward the fourth side 314 , so that the first fixing portion 322 can be fixed to the bottom plate 1 near the fourth side 314 . In other words, the first fixing portion 322 is close to the fourth side 314 . Preferably, the first fixing portion 322 is a thermal melting point, so that it can be fixed to the base plate 1 by thermal melting. As shown in FIG. 2 , the circuit board 2 of the present embodiment may have a hole 22 to allow the first fixing portion 322 to pass through and be thermally fused to the bottom plate 1 . In other embodiments, the first fixing portion 322 can also fix the bottom plate 1 by gluing, screwing or other fixing methods, which is not limited in the present invention.

Similarly, the second elastic arm 33 extends from a position close to the third side 313 toward the direction of the fourth side 314 . The second fixing portion 332 can be fixed to the base plate 1 in the aforementioned manner, which can be fixed to the base plate 1 by, for example, but not limited to, heat fusion, adhesive, screw locking, or other means. The position of the second fixing portion 332 is also close to the fourth side 314 . In other words, one end of the first elastic arm 32 and the second elastic arm 33 (ie, the first starting end 321 and the second starting end 331 ) are close to the third side 313 , and the first fixing portion 322 and the second fixing portion 332 are close to the third side 313 . The four sides 314 are fixed to the base plate 1 .

FIG. 7 is a partial schematic diagram of a keyboard according to a second embodiment of the present invention. Please refer to FIG. 7 . In this embodiment, the keyboard K1 includes a bottom plate 1c, a circuit board 2c, a key module 3c and a frame 4c. The key module 3c also includes a plurality of key units 30c, and the main structure thereof can refer to the first embodiment. The difference between the keyboard K2 of the second embodiment and the first embodiment is that the first fixing portion 322c of the first elastic arm 32c and the second fixing portion 332c of the second elastic arm 33c in this embodiment are fixed to the frame 4c. Likewise, the first fixing portion 322c and the second fixing portion 332c may be fixed to the frame 4c by heat fusion, adhesive, screw locking, or other methods, which are not limited in the present invention. In this embodiment, the first fixing portion 322c and the second fixing portion 332c are holes for thermal melting, and the frame 4c has a thermal melting point 41c corresponding to the first fixing portion 322c and the second fixing portion 332c. The first elastic arm 32c and the second elastic arm 33c can be fixed to the frame 4c by thermal fusion. When the user presses the keycap 31c, the first elastic arm 32c and the second elastic arm 33c can also drive the keycap 31c to move up and down relative to the bottom plate 1c.

The following description will continue by taking the keyboard K1 of the first embodiment as an example. With the aforementioned structures of the first elastic arm 32 and the second elastic arm 33 , the first starting end 321 , the second starting end 331 , the first fixing portion 322 , and the second fixing portion 332 can be used to displace the keycap 31 up and down. fulcrum. Specifically, when the keycap 31 is pressed to move downward (ie, toward the bottom plate 1 ), the first fixing portion 322 and the second fixing portion 332 are fixed fulcrums, and the first starting end 321 and the second starting end 331 follow the The keycap 31 moves downward, so that the first elastic arm 32 and the second elastic arm 33 are deformed (for example, compressed). When the keycap 31 stops being pressed, the first elastic arm 32 and the second elastic arm 33 return to their original state, the first fixing portion 322 and the second fixing portion 332 are also fixed fulcrums, and the first starting end 321 and the second starting end 331 Drive the keycap 31 to return to its original position. Therefore, with the structure of the first elastic arm 32 and the second elastic arm 33, the keycap 31 can be moved up and down. Movement without the use of reset parts, thereby reducing the overall thickness of the keyboard K1 to achieve a thinner and lighter effect. At the same time, the cost saving effect can also be achieved by removing the conventional reset member.

Preferably, as shown in FIG. 3 , the first elastic arm 32 and the second elastic arm 33 are arranged along the outer contour of the keycap 31 , that is, the area outside the orthographic projection of the keycap 31 , compared with the connection of the conventional keyboard. The components (such as scissor foot connectors) are arranged below the keycaps. The configuration of the present invention can effectively utilize the space between the keycaps 31 and save the space below the keycaps 31 , which is beneficial to the thinning of the key unit 30 .

Preferably, as shown in FIG. 4 , the first starting end 321 is located at the junction of the first side 311 and the bottom surface 315 , and the second starting end 331 is located at the junction of the second side 312 and the bottom surface 315 . The design of the first starting end 321 and the second starting end 331 close to the bottom surface 315 can prevent the frame 4 from interfering with the first elastic arm 32 and the second elastic arm 30 when the frame 4 (as shown in FIGS. 1 and 2 ) is assembled to the button unit 30 . Action of the spring arm 33 .

As shown in FIGS. 2 and 4 , the trigger portion 34 of this embodiment is disposed on the bottom surface 315 of the keycap 31 and corresponds to the trigger switch 21 of the circuit board 2 . When the key cap 31 is pressed, the key cap 31 is close to the circuit board 2 , and the trigger portion 34 can contact the trigger switch 21 to generate an input signal. Preferably, the trigger portion 34 can be made of an elastic material, such as but not limited to a rubber material. When the key cap 31 stops being pressed, the elastic material of the trigger portion 34 can further provide the force for the key unit 30 to return to its original position.

As shown in FIG. 3 and FIG. 4 , the other end (ie, the second end 333 ) of the second elastic arm 33 in this embodiment is connected to the first elastic arm 32 a of the adjacent key unit 30 a, thereby making the adjacent The key units 30, 30a may be connected to each other. in particular, The second end 333 of the second elastic arm 33 is connected to the first end 323a of the first elastic arm 32a of the adjacent key unit 30a. Similarly, the second end 333a of the second elastic arm 33a is also connected to the first end 323b of the first elastic arm 32b of the adjacent key unit 30b, so that the adjacent key units 30a and 30b are connected to each other.

The adjacent key units 30, 30a, 30b are connected to each other by the structure that the second elastic arm 33 (or 33a) and the adjacent first elastic arm 32a (or 33b) are connected to each other. Therefore, the key module 3 can be manufactured by integral molding, such as injection molding. In one embodiment, the keycaps 31, 31a, 31b, the first elastic arms 32, 32a, 32b and the second elastic arms 33, 33a, 33b can be made of the same plastic material, such as acrylonitrile-butadiene -Styrene copolymer (Acrylonitrile Butadiene Styrene) material (hereinafter referred to as ABS material) is integrally formed. In another embodiment, the key caps 31 , 31 a , 31 b , the first elastic arms 32 , 32 a , 32 b and the second elastic arms 33 , 33 a , 33 b can be made of different plastic materials by double-material injection. For example, the keycaps 31, 31a, 31b can be made of the aforementioned ABS material, and the first elastic arms 32, 32a, 32b and the second elastic arms 33, 33a, 33b can be made of polyoxymethylene (POM) material.

After the key module 3 is fabricated, it can be assembled to the circuit board 2 at one time, thereby reducing assembly steps. Specifically, in the assembly of the conventional keyboard, the key unit (including the reset member, the connecting member and the key cap) needs to be respectively installed on the circuit board or the bottom plate, so the key module 3 of this embodiment can be assembled at one time, which is more convenient Reduce assembly steps.

As shown in FIG. 3 , preferably, the first elastic arm 32 of this embodiment has at least two first bending portions 324 and 325 , so that the first elastic arm 32 can be disposed along the outer contour of the keycap 31 . Specifically, the first elastic arm 32 has two first bending parts 324 and 325 . In addition, the first elastic arm 32 also has a first extending section 328 located between the two first bending portions 324 and 325 . The structure of the first elastic arm 32 is connected from the first starting end 321 to the first extending section 328 through the first bending portion 324 . The first extending section 328 extends along the edge of the first side 311 and is arranged in parallel with the first side 311 , and then pass through another first bending portion 325 to be parallel to the fourth side 314 . Preferably, the outer edge of the first extension section 328 and the first side 311 are parallel to each other, that is to say, the first extension section 328 in this embodiment is a rectangular section with the same width, but the invention is not limited to this. The configuration of the first extension section can also be adjusted according to actual needs.

In addition, the first elastic arm 32a of the button unit 30a has three first bending parts 324a, 325a, 326a and a first extending section 328a, while the first elastic arm 32b of the button unit 30b has three first bending parts 324b, 325b, 326b, a first extension section 328b, and the first elastic arm 32a is used as an example for description below. After the first elastic arm 32a extends from the first side 311a of the keycap 31a, after passing through the first first bending portion 324A, the first extending section 328a is arranged in parallel with the first side 311a, and then passes through the second first bending portion 324A. The bent portion 325a is arranged in parallel with the fourth side 314a. The first elastic arm 32a is then folded through the third first bending portion 326a (still arranged in parallel with the fourth side 314a ), so as to be connected to the second end 333 of the adjacent second elastic arm 33 .

As shown in FIG. 4 , the first fixing portion 322 of the first elastic arm 32 of the button unit 30 located on the far right is located at the first end 323 . button in the middle In the units 30a, 30b, the last section of the first elastic arms 32a, 32b is folded back and connected with the adjacent second elastic arms 33, 33a, so the first fixed parts 322a, 322b of the first elastic arms 32a, 32b can be located at Between the first starting ends 321a, 321b and the first ends 323a, 323b. Preferably, the first fixing portions 322a, 322b may be located at the aforementioned third first bending portions 326a, 326b, as shown in FIG. 4 .

Preferably, the first elastic arm 32 and the second elastic arm 33 are arranged symmetrically. Similarly, the second elastic arm 33 also has at least two second bending portions 334 , 335 , 336 , and the three second bending portions 334 , 335 , 336 are used as an example for illustration. In addition, the second elastic arm 33 also has a second extending section 338 located between the two second bending portions 334 and 335 . After the second elastic arm 33 extends from the second side 312 of the keycap 31, after passing through the first second bending portion 334, the second extending section 338 is arranged in parallel with the second side 312, and then passes through the second second bending portion 334. The bent portion 335 is arranged in parallel with the fourth side 314 . The second elastic arm 33 passes through the third second bending portion 336 and is folded back (still arranged in parallel with the fourth side 314 ), so as to be connected to the first end 323a of the adjacent first elastic arm 32a. In short, taking the key unit 30 as an example, the part of the first elastic arm 32 and the part of the second elastic arm 33 and the first side 311 and the second side 312 of the key cap 31 are parallel to each other.

In this embodiment, the second fixing portion 332 is located between the second starting end 331 and the second end 333 , and is located at the third second bending portion 336 , as shown in FIG. 4 . The second elastic arms 33a, 33b of the other key units 30a, 30b also have the same structure, and details are not described here. The second elastic arm of the key unit (not shown) located on the leftmost side of the keyboard K1 may have two bent portions, and the second fixed portion may be located at the second end.

In addition, the present invention does not limit the structures of the first elastic arms 32, 32a, 32b and the second elastic arms 33, 33a, 33b. For the key unit 30b with multiple keys, the first elastic arm 32b and the second elastic arm 33b may be widened and hollowed out. The strength is increased by the widened first elastic arm 32b and the second elastic arm 33b, and the elasticity of the first elastic arm 32b and the second elastic arm 33b is maintained by the hollow structure. Specifically, the width W (as shown in FIG. 6 ) of the first elastic arm 32 or the second elastic arm 33 of the single key may preferably be between 0.9 mm and 1.5 mm, and 1.2 mm is taken as an example in this embodiment. It should be noted that, this mainly refers to the width of the first extension section 328 or the second extension section 338 . In addition, the width W of the first elastic arm 32b or the second elastic arm 33b of the multiple key (for the sake of brevity of the drawing, only the second elastic arm 33b in FIG. 3) is preferably between 2.8mm and 3.8mm, This embodiment takes 3.4mm as an example. Likewise, this mainly refers to the width of the first extension section 328b or the second extension section 338b.

In addition, the first elastic arm 32b further includes a first opening 327b located at the first extending section 328b. In addition, the second elastic arm 33b further includes a second opening 337b located at the second extending section 338b. Preferably, the first opening 327b and the second opening 337b are elongated openings. A long axis of the first opening 327b and the second opening 337b is parallel to the first side 311b and the second side 312b, respectively.

To sum up, the keyboard according to the present invention includes a bottom plate, a circuit board and a key module. The key module includes a plurality of key units, and each key unit includes a key cap, a first elastic arm, a second elastic arm and a trigger portion. One end of the first elastic arm is connected to the keycap, and a first fixing portion of the first elastic arm is fixed to the bottom plate. One end of the second elastic arm is connected to the keycap, and a second fixing portion of the second elastic arm is fixed to the bottom plate. With the structure of the first elastic arm and the second elastic arm, the keycap can be moved up and down without using a reset member, thereby reducing the overall thickness of the keyboard to achieve a lighter and thinner effect. At the same time, the cost saving effect can also be achieved by removing the conventional reset member. In addition, the other end of the second elastic arm is connected to the first elastic arm of the adjacent key units, so that the adjacent key units are connected to each other. Therefore, the key module can be manufactured by integral molding. After the key module is fabricated, it can also be assembled to the circuit board at one time, thereby reducing the assembling steps, so as to achieve the effect of facilitating the assembly process.

It should be noted that the above-mentioned embodiments are given as examples for the convenience of description, and the scope of the claims claimed in the present invention should be based on the scope of the patent application, rather than being limited to the above-mentioned embodiments.

1: Bottom plate

2: circuit board

21: Trigger switch

22: Holes

3: key module

30, 30a, 30b: key unit

34: Trigger Department

4: Frame

K1: Keyboard

Claims (12)

A keyboard, comprising: a bottom plate; a key module set on the bottom plate, the key module includes a plurality of key units, each of the key units includes: a key cap, with a bottom surface, a first side opposite and a a second side, and an opposite third side and a fourth side; a first elastic arm including a first fixing part, one end of the first elastic arm is connected to the first side of the keycap, and Extending from a position close to the third side toward the fourth side, the first fixing portion is fixed at a position close to the fourth side; and a second elastic arm including a second fixing portion, the One end of the second elastic arm is connected to the second side of the keycap, and extends from a position close to the third side toward the fourth side, and the second fixing portion is fixed close to the fourth side The other end of the second elastic arm is connected with the first elastic arm of the adjacent button unit. The keyboard of claim 1, wherein the first elastic arm includes a first starting end and a first end, the first starting end is connected to the first side of the keycap, and the second elastic arm includes a second an initial end and a second end, the second initial end is connected to the second side of the keycap, and the second end is connected to the first end of the first elastic arm of the adjacent key unit. The keyboard of claim 1, wherein the first elastic arm comprises a first starting end and a first end, the first starting end is connected to the first side of the keycap, and the first fixing portion is located at the first The end, or between the first start end and the first end; the second elastic arm includes a second start end and a second end, the second start end is connected to the second side of the keycap, The second fixing portion is located between the second starting end and the second end. The keyboard of claim 2, wherein the first starting end is located at the junction of the first side and the bottom surface, and the second starting end is located at the junction of the second side and the bottom surface. The keyboard of claim 2, wherein the distance between the first start end and the third side is less than or equal to 1/3 of the length of the first side, and the distance between the second start end and the third side less than or equal to 1/3 of the length of the second side. The keyboard of claim 1, wherein the first elastic arm has at least two first bending parts, and the second elastic arm has at least two second bending parts. The keyboard of claim 6, wherein the first elastic arm has a first extension section located between the two first bending parts, and the second elastic arm has a second extension section located between the two first bending parts Between the second bending portions, the first extension section and the second extension section are parallel to the first side and the second side of the keycap, respectively. The keyboard of claim 1, wherein the first elastic arm further includes a first opening, and the second elastic arm further includes a second opening. The keyboard of claim 8, wherein a long axis of the first opening and the second opening are parallel to the first side and the second side, respectively. The keyboard of claim 1, wherein a circuit board is disposed on the bottom plate, the circuit board includes a plurality of trigger switches, and each of the key caps has a trigger portion disposed on the bottom surface and corresponding to one of the trigger switches one. The keyboard of claim 1, wherein the first fixing portion and the second fixing portion are fixed to the base plate. The keyboard of claim 1, further comprising: a frame disposed on the key module, and the first fixing part and the second fixing part are fixed to the frame.

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