keyboard

Abstract

A keyboard includes a bottom plate and a key module. The key module is disposed 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 and a second elastic arm. The key cap has a bottom surface, opposite first and second sides, and opposite third and fourth sides. The first elastic arm includes a first fixed portion fixed near the fourth side. One end of the first elastic arm is connected to the first side and extends from a position near the third side toward the fourth side. The second elastic arm includes a second fixed portion fixed near the fourth side. One end of the second elastic arm is connected to the second side and extends from a position near the third side toward the fourth side. The other end of the second elastic arm is connected to the adjacent first elastic arm.

Description

Technical Field

[0001] This invention relates to a keyboard, and more particularly to a thin keyboard. Background Technology

[0002] In current computer usage habits, the keyboard is an indispensable input device. Both computers themselves and their peripherals are evolving towards a design philosophy of being light, thin, short, and small. Keyboards have also transformed from early large architectures to thin keyboards. Thin keyboards typically use membrane circuit boards and are therefore called membrane keyboards. The main components of a thin keyboard include a base plate, a membrane circuit board, connectors (such as scissor-switch connectors), a reset component (such as a rubber elastic element), and keycaps. Pressing the keycaps triggers the switching of the membrane circuit board. Because thin keyboards have a low actuation distance, the keycaps can be directly guided to rise and fall relative to the base plate via the connectors, and the reset component provides the force for the keycaps to return to their original position.

[0003] Currently, the manufacturing requirements for slim keyboards primarily focus on simplifying the assembly process and reducing production costs. However, existing slim keyboards still require each connector, reset component, and keycap to be assembled separately onto the base plate, indicating room for improvement in the manufacturing process. Furthermore, the aesthetic requirements for slim keyboards naturally include making them thinner and lighter. However, the placement of reset components and connectors also limits the keyboard's thickness. Summary of the Invention

[0004] In view of the above-mentioned problems, the main objective of the present invention is to provide a keyboard that solves the problems of complicated assembly steps and thinness of known keyboards through a novel structural design of the key module.

[0005] To achieve the above objectives, the present invention provides a keyboard, comprising a base plate and a key module. The key module is disposed on the base plate and includes multiple key units. Each key unit includes a keycap, a first spring arm, a second spring arm, and a trigger portion. 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 spring arm includes a first fixing portion. One end of the first spring arm is connected to the first side of the keycap and extends from a position near the third side toward the fourth side. The first fixing portion is fixed at a position near the fourth side. The second spring arm includes a second fixing portion. One end of the second spring arm is connected to the second side of the keycap and extends from a position near the third side toward the fourth side. The second fixing portion is fixed to the base plate and near the fourth side. The other end of the second spring arm is interconnected with the first spring arm of an adjacent key unit.

[0006] According to one embodiment of the present invention, a first spring arm includes a first starting end and a first ending end. The first starting end is connected to a first side of the keycap. A second spring arm includes a second starting end and a second ending end. The second starting end is connected to a second side of the keycap. The second ending end is interconnected with the first ending end of the first spring arm of an adjacent key unit.

[0007] According to one embodiment of the present invention, a first spring arm includes a first starting end and a first ending end. The first starting end is connected to a first side of the keycap. A first fixing portion is located at the first ending end or between the first starting end and the first ending end. A second spring arm includes a second starting end and a second ending end. The second starting end is connected to a second side of the keycap. The second fixing portion is located between the first starting end and the first ending end.

[0008] According to one 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.

[0009] According to one 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.

[0010] According to one embodiment of the present invention, the first elastic arm has at least two first bending portions, and the second elastic arm has at least two second bending portions.

[0011] According to one embodiment of the present invention, the first spring arm has a first extension section located between the two first bends. The second spring arm has a second extension section located between the two second bends. The first extension section and a portion of the second extension section are parallel to the first and second sides of the keycap, respectively.

[0012] According to one embodiment of the present invention, the first spring arm further includes a first opening, and the second spring arm further includes a second opening.

[0013] According to one embodiment of the present invention, a major axis of the first opening and the second opening are parallel to the first side and the second side, respectively.

[0014] According to one embodiment of the present invention, a circuit board is provided on the base plate, and the circuit board includes a plurality of trigger switches. Each keycap has a trigger portion disposed on the bottom surface and corresponding to one of the plurality of trigger switches.

[0015] According to one embodiment of the present invention, the first fixing part and the second fixing part are fixed to the base plate.

[0016] According to one 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.

[0017] As described above, the keyboard according to the present invention includes a base plate, a circuit board, and a key module. The key module includes multiple key units, and each key unit includes a keycap, a first spring arm, a second spring arm, and a trigger portion. One end of the first spring arm is connected to the keycap, and a first fixing portion of the first spring arm is fixed to the base plate. One end of the second spring arm is connected to the keycap, and a second fixing portion of the second spring arm is fixed to the base plate. Through the structure of the first and second spring arms, the keycap can move up and down without the need for a reset component, thereby reducing the overall thickness of the keyboard and achieving a thinner and lighter effect. Simultaneously, removing the known reset component also saves costs. Furthermore, the other end of the second spring arm is connected to the first spring arm of an adjacent key unit, allowing adjacent key units to be interconnected. Therefore, the key module can be manufactured in a single molding process. After the key module is manufactured, it can be assembled onto the circuit board in one go, thereby reducing assembly steps and facilitating process assembly. Attached Figure Description

[0018] Figure 1 This is a partial schematic diagram of the keyboard according to the first embodiment of the present invention;

[0019] Figure 2 for Figure 1 An exploded view of the keyboard is shown below;

[0020] Figure 3 for Figure 2 Top view of the button module shown;

[0021] Figure 4 for Figure 2 The bottom view of the button module shown;

[0022] Figure 5 for Figure 1 The keyboard shown is in a bottom view.

[0023] Figure 6 for Figure 3 A schematic diagram of one of the button units shown;

[0024] Figure 7 This is a partial schematic diagram of the keyboard according to the second embodiment of the present invention.

[0025] [Symbol Explanation]

[0026] Base plate 1, 1c

[0027] Circuit board 2, 2c

[0028] Trigger switch 21

[0029] Hole 22

[0030] Button module 3, 3C

[0031] Button units 30, 30a, 30b, 30c

[0032] Keycaps 31, 31a, 31b, 31c

[0033] First side 311, 311a, 311b

[0034] Second side 312, 312b

[0035] Third side 313

[0036] Fourth side 314, 314a

[0037] Bottom 315

[0038] First spring arms 32, 32a, 32b, 32c

[0039] First starting ends 321, 321a, 321b

[0040] First fixing parts 322, 322a, 322b, 322c

[0041] First end 323, 323a, 323b

[0042] First bends 324, 324a, 324b, 325, 325a, 325b, 326a, 326

[0043] First opening 327b

[0044] First extension section 328, 328a, 328b

[0045] Second projectile arms 33, 33a, 33b, 33c

[0046] Second starting end 331

[0047] Second fixing part 332

[0048] Second end 333, 333a

[0049] Second bend section 334, 335, 336

[0050] Second opening 337b

[0051] Second extension section 338, 338b

[0052] Trigger 34

[0053] Framework 4, 4c

[0054] Hot melting point 41°C

[0055] Distance from D1 and D2

[0056] Lengths L1 and L2

[0057] Keyboards K1 and K2

[0058] Width W Detailed Implementation

[0059] To better understand the technical content of the present invention, preferred embodiments are described below.

[0060] Figure 1 This is a partial schematic diagram of the keyboard according to the first embodiment of the present invention. Figure 2 for Figure 1 The diagram shown is an exploded view of the keyboard. Figure 3 for Figure 2 The top view of the button module shown. Figure 4 for Figure 2 The button module shown is a bottom view. Figure 5 for Figure 1 The following description refers to the bottom view of the keyboard shown in the attached figures. In this embodiment, the keyboard K1 includes a base plate 1, a circuit board 2, a key module 3, and a frame 4. The circuit board 2 is mounted on the base plate 1. In this embodiment, the circuit board 2 can be a thin-film circuit board and includes multiple trigger switches 21. The key module 3 is mounted on the base plate 1, and in this embodiment, the key module 3 is mounted on the circuit board 2, while the frame 4 is mounted on the key module 3. In this embodiment, the key module 3 includes multiple key units 30, 30a, and 30b. The following description will focus on key unit 30. Adjacent key units 30 are interconnected; for example, key units 30 and 30a are interconnected, and key units 30a and 30b are interconnected. Therefore, the key module 3 can be integrally molded, producing multiple key units 30 at once, and directly assembled onto the circuit board 2.

[0061] Please refer to Figures 1 to 4 Specifically, each button unit 30 in this embodiment includes a keycap 31, a first spring arm 32, a second spring arm 33, and a trigger part 34. For example... Figure 3 As shown, the keycap 31 has a first side 311 and a second side 312, a third side 313 and a fourth side 314, and a bottom surface 315 (as shown). Figure 4(As shown). In this embodiment, the keycap 31 has a quadrilateral structure and has a first side 311, a second side 312, a third side 313, and a fourth side 314. 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 the key unit 30 near the fourth side 314 of the keycap 31 to operate each key unit 30. When the user presses the keycap 31, the first spring arm 32 and the second spring arm 33 drive the keycap 31 to rise and fall relative to the base plate 1, but the present invention is not limited thereto. In other embodiments, the user can also press the key unit 30 near the third side 313 of the keycap 31 to operate each key unit 30.

[0062] One end of the first spring arm 32 is connected to the first side 311 of the keycap 31, while one end of the second spring arm 33 is connected to the second side 312 of the keycap 31. In other words, the first spring arm 32 and the second spring arm 33 are located on opposite sides of the keycap 31. Specifically, in this embodiment, the first spring arm 32 includes a first starting end 321 and a first fixing part 322 (e.g., ...). Figure 4 and Figure 5 (as shown) and a first end 323. The first spring arm 32 is connected to the first side 311 of the keycap 31 with the first starting end 321. Similarly, the second spring arm 33 includes a second starting end 331, a second fixing part 332 (as shown) and a first end 323. Figure 4 (as shown) and a second end 333. The second spring arm 33 is connected to the second side 312 of the keycap 31 with the second starting end 331.

[0063] Furthermore, the first starting end 321 is closer to the third side 313, causing the first spring arm 32 to extend from the position close to the third side 313 toward the fourth side 314. Figure 6 for Figure 3 Please refer to the schematic diagram of one of the button units 30 shown. Figure 6 As shown. 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 3 times the distance D1 between the first starting end 321 and the third side 313. Correspondingly, the distance D2 between the 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.

[0064] Please refer to Figure 3 , Figure 4 and Figure 5 As shown, the first spring arm 32 extends towards the fourth side 314, allowing the first fixing part 322 to be fixed to the base plate 1 near the fourth side 314. In other words, the first fixing part 322 is close to the fourth side 314. Preferably, the first fixing part 322 is a heat-fusion point, allowing it to be fixed to the base plate 1 by heat fusion. Figure 2As shown, the circuit board 2 in this embodiment may have a recessed hole 22 for the first fixing part 322 to pass through and be heat-fused to the base plate 1. In other embodiments, the first fixing part 322 may also be glued, screwed or other fixing methods to fix the base plate 1, and the present invention is not limited thereto.

[0065] Similarly, the second spring arm 33 extends from a position near the third side 313 toward the fourth side 314. The second fixing part 332 can be fixed to the base plate 1 in the manner described above, and it can be fixed to the base plate 1 by, for example, but not limited to, heat fusion, adhesive, screwing, or other means. The position of the second fixing part 332 is also close to the fourth side 314. In other words, one end of the first spring arm 32 and the second spring arm 33 (i.e., the first starting end 321 and the second starting end 331) is close to the third side 313, while the first fixing part 322 and the second fixing part 332 are fixed to the base plate 1 near the fourth side 314.

[0066] Figure 7 This is a partial schematic diagram of the keyboard according to the second embodiment of the present invention. Please refer to... Figure 7 As shown. In this embodiment, the keyboard K1 includes a base plate 1c, a circuit board 2c, a key module 3c, and a frame 4c. The key module 3c also includes multiple key units 30c, the main structure of which can be referred to in the first embodiment. The difference between the keyboard K2 in the second embodiment and the first embodiment is that the first fixing part 322c of the first spring arm 32c and the second fixing part 332c of the second spring arm 33c are fixed to the frame 4c. Similarly, the first fixing part 322c and the second fixing part 332c can be fixed to the frame 4c by heat melting, bonding, screwing, or other means, and the present invention is not limited thereto. In this embodiment, the first fixing part 322c and the second fixing part 332c are holes for heat melting, and the frame 4c has heat melting points 41c corresponding to the first fixing part 322c and the second fixing part 332c. The first spring arm 32c and the second spring arm 33c can be fixed to the frame 4c by heat melting. When the user presses the keycap 31c, the first spring arm 32c and the second spring arm 33c can also drive the keycap 31c to rise and fall relative to the base plate 1c.

[0067] The following description continues using the keyboard K1 of the first embodiment as an example. Through the aforementioned structure of the first spring arm 32 and the second spring arm 33, the first starting end 321, the second starting end 331, the first fixing part 322, and the second fixing part 332 can serve as fulcrums for the up-and-down displacement of the keycap 31. Specifically, when the keycap 31 is pressed down (i.e., towards the base plate 1), the first fixing part 322 and the second fixing part 332 are fixed fulcrums, while the first starting end 321 and the second starting end 331 move down with the keycap 31, causing the first spring arm 32 and the second spring arm 33 to deform (e.g., be compressed). When the keycap 31 is stopped being pressed, the first spring arm 32 and the second spring arm 33 return to their original state, the first fixing part 322 and the second fixing part 332 again become fixed fulcrums, and the first starting end 321 and the second starting end 331 drive the keycap 31 back to its original position. Therefore, the structure of the first spring arm 32 and the second spring arm 33 allows the keycap 31 to move up and down without the need for a reset component, thereby reducing the overall thickness of the keyboard K1 and achieving a thinner and lighter design. At the same time, removing the known reset component also saves costs.

[0068] Better, such as Figure 3 As shown, the first spring arm 32 and the second spring 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 known keyboard connectors (such as scissor-switch connectors) which 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.

[0069] Better, such as Figure 4 As shown, 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 being close to the bottom surface 315 allows the frame 4 (as shown) to... Figure 1 and Figure 2 When assembled into the button unit 30 (as shown), the frame 4 can avoid interfering with the operation of the first spring arm 32 and the second spring arm 33.

[0070] like Figure 2 and Figure 4 As shown, in this embodiment, the trigger portion 34 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 keycap 31 is pressed, the keycap 31 approaches the circuit board 2, and the trigger portion 34 interacts with 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, rubber. When the keycap 31 is stopped being pressed, the elastic material of the trigger portion 34 can also provide a force for the key unit 30 to return to its original position.

[0071] like Figure 3 and Figure 4 As shown, in this embodiment, the other end (i.e., the second end 333) of the second spring arm 33 is connected to the first spring arm 32a of the adjacent button unit 30a, thereby enabling the adjacent button units 30 and 30a to be interconnected. Specifically, the second end 333 of the second spring arm 33 is connected to the first end 323a of the first spring arm 32a of the adjacent button unit 30a. Similarly, the second end 333a of the second spring arm 33a is also connected to the first end 323b of the first spring arm 32b of the adjacent button unit 30b, enabling the adjacent button units 30a and 30b to be interconnected.

[0072] The adjacent key units 30, 30a, and 30b are interconnected through the structure where the second spring arm 33 (or 33a) is connected to the adjacent first spring arm 32a (or 33b). Therefore, the key module 3 can be manufactured in one piece, for example, by injection molding. In one embodiment, the keycaps 31, 31a, and 31b, along with the first spring arms 32, 32a, and 32b and the second spring arms 33, 33a, and 33b, can be made of the same plastic material, such as acrylonitrile butadiene styrene copolymer (hereinafter referred to as ABS material), in one piece. In another embodiment, the keycaps 31, 31a, and 31b, along with the first spring arms 32, 32a, and 32b and the second spring arms 33, 33a, and 33b, can be made of different plastic materials and manufactured using a two-material injection molding process. For example, keycaps 31, 31a, and 31b can be made of the aforementioned ABS material, while the first spring arms 32, 32a, 32b and the second spring arms 33, 33a, and 33b can be made of polyoxymethylene (POM) material.

[0073] Once the key module 3 is manufactured, it can be assembled onto the circuit board 2 in one go, thereby reducing the number of assembly steps. Specifically, it is known that keyboard assembly requires the key units (including reset components, connectors, and keycaps) to be installed onto the circuit board or base plate separately. Therefore, the key module 3 in this embodiment can be assembled in one go, which makes it easier to reduce the number of assembly steps.

[0074] like Figure 3As shown, preferably, the first spring arm 32 of this embodiment has at least two first bending portions 324 and 325, so that the first spring arm 32 can be arranged along the outer contour of the keycap 31. Specifically, the first spring arm 32 has two first bending portions 324 and 325. Furthermore, the first spring arm 32 also has a first extension segment 328 located between the two first bending portions 324 and 325. The structure of the first spring arm 32 is such that it connects from the first starting end 321 to the first extension segment 328 via the first bending portion 324. The first extension segment 328 extends along the edge of the first side 311 and is parallel to the first side 311, then passes through another first bending portion 325 and is parallel to the fourth side 314. Preferably, the outer edge of the first extension segment 328 is parallel to the first side 311, that is, the first extension segment 328 of this embodiment is a rectangular segment maintaining the same width, but the present invention is not limited thereto, and the configuration of the first extension segment can be adjusted according to actual needs.

[0075] Furthermore, the first spring arm 32a of the key unit 30a has three first bending portions 324a, 325a, and 326a and one first extension segment 328a, while the first spring arm 32b of the key unit 30b has three first bending portions 324b, 325b, and 326b and one first extension segment 328b. The following description uses the first spring arm 32a as an example. After extending from the first side 311a of the keycap 31a, the first spring arm 32a passes through the first first bending portion 324A, and the first extension segment 328a is arranged parallel to the first side 311a. After passing through the second first bending portion 325a, it is arranged parallel to the fourth side 314a. The first spring arm 32a then passes through the third first bending portion 326a and bends back (still arranged parallel to the fourth side 314a), thus connecting with the second end 333 of the adjacent second spring arm 33.

[0076] like Figure 4 As shown, the rightmost button unit 30 has its first fixing portion 322 of the first spring arm 32 located at the first end 323. The button units 30a and 30b in the middle have their last section of the first spring arms 32a and 32b folded back and connected to the adjacent second spring arms 33 and 33a. Therefore, the first fixing portions 322a and 322b of the first spring arms 32a and 32b can be located between the first starting ends 321a and 321b and the first ending ends 323a and 323b. Preferably, the first fixing portions 322a and 322b can be located at the aforementioned third first bending portions 326a and 326b, such as... Figure 4 As shown.

[0077] Preferably, the first spring arm 32 and the second spring arm 33 are symmetrically arranged. Similarly, the second spring arm 33 also has at least two second bends 334, 335, and 336, and will be described here as an example with three second bends 334, 335, and 336. In addition, the second spring arm 33 also has a second extension 338, which is located between the two second bends 334 and 335. After extending from the second side 312 of the keycap 31, the second spring arm 33 passes through the first second bend 334, and the second extension 338 is parallel to the second side 312. After passing through the second second bend 335, it is parallel to the fourth side 314. The second spring arm 33 then bends back through the third second bend 336 (still parallel to the fourth side 314), and can then connect with the first end 323a of the adjacent first spring arm 32a. In short, taking the key unit 30 as an example, the first spring arm 32 and the second spring arm 33 are parallel to the first side 311 and the second side 312 of the keycap 31.

[0078] In this embodiment, the second fixing part 332 is located between the first starting end 321 and the first ending end 323, at the third second bending part 336, as shown. Figure 4 As shown. The second spring arms 33a and 33b of the other key units 30a and 30b also have the same structure, and will not be described in detail here. The key unit located on the far left of the keyboard K1 (not shown in the figure) may have two bent parts in its second spring arm, and the second fixing part may be located at the second end.

[0079] Furthermore, this invention does not limit the structure of the first spring arms 32, 32a, 32b and the second spring arms 33, 33a, 33b. For the key unit 30b of the multi-key, its first spring arm 32b and second spring arm 33b can be widened and hollowed out. The strength is increased by widening the first spring arm 32b and second spring arm 33b, and the elasticity of the first spring arm 32b and second spring arm 33b is maintained by the hollowed-out structure. Specifically, the width W of the first spring arm 32 or the second spring arm 33 of the single-key (e.g., ...) Figure 6 (As shown) Preferably, the width can be between 0.9mm and 1.5mm; this embodiment uses 1.2mm as an example. It should be noted that this mainly refers to the width of the first extension segment 328 or the second extension segment 338. Additionally, the width W of the first spring arm 32b or the second spring arm 33b of the multi-key (for simplicity, only indicated on the drawing) Figure 3 The second extension arm 33b is preferably between 2.8mm and 3.8mm; in this embodiment, 3.4mm is used as an example. Similarly, this mainly refers to the width of the first extension 328b or the second extension 338b.

[0080] Furthermore, the first spring arm 32b also includes a first opening 327b located in the first extension 328b. The second spring arm 33b also includes a second opening 337b located in the second extension 338b. Preferably, the first opening 327b and the second opening 337b are elongated openings. A major axis of the first opening 327b and the second opening 337b is parallel to the first side 311b and the second side 312b, respectively.

[0081] In summary, the keyboard according to the present invention includes a base plate, a circuit board, and a key module. The key module includes multiple key units, and each key unit includes a keycap, a first spring arm, a second spring arm, and a trigger portion. One end of the first spring arm is connected to the keycap, and a first fixing portion of the first spring arm is fixed to the base plate. One end of the second spring arm is connected to the keycap, and a second fixing portion of the second spring arm is fixed to the base plate. Through the structure of the first and second spring arms, the keycap can move up and down without the need for a reset component, thereby reducing the overall thickness of the keyboard and achieving a thinner and lighter design. Simultaneously, removing the known reset component also saves costs. Furthermore, the other end of the second spring arm is connected to the first spring arm of an adjacent key unit, allowing adjacent key units to connect to each other. Therefore, the key module can be manufactured in a single molding process. After the key module is manufactured, it can be assembled onto the circuit board in one go, thereby reducing assembly steps and facilitating process assembly.

[0082] It should be noted that the above embodiments are examples for illustrative purposes only, and the scope of the claims of this invention should be determined by the claims, and not limited to the above embodiments.

Claims

1. A keyboard, characterized in that, include: One base plate; A framework; A button module is mounted on the base plate. The button module includes multiple button units, each of which includes: A 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. A first spring arm includes a first fixing part, one end of which is connected to the first side of the keycap and extends from a position near the third side toward the fourth side; the first fixing part is fixed at a position near the fourth side. A second spring arm includes a second fixing part. One end of the second spring arm is connected to the second side of the keycap and extends from a position near the third side toward the fourth side. The second fixing part is fixed at a position near the fourth side. The other end of the second spring arm is connected to the first spring arm of the adjacent key unit. The first fixing part and the second fixing part are fixed to the base plate or the frame and serve as the fulcrum for the keycap to move up and down.

2. The keyboard according to claim 1, characterized in that, The first spring arm includes a first starting end and a first ending end. The first starting end is connected to the first side of the keycap. The second spring arm includes a second starting end and a second ending end. The second starting end is connected to the second side of the keycap. The second ending end is connected to the first ending end of the first spring arm of the adjacent key unit.

3. The keyboard according to claim 1, characterized in that, The first spring arm includes a first starting end and a first ending end. The first starting end is connected to the first side of the keycap, and the first fixing part is located at the first ending end or between the first starting end and the first ending end. The second spring arm includes a second starting end and a second ending end. The second starting end is connected to the second side of the keycap, and the second fixing part is located between the first starting end and the first ending end.

4. The keyboard according to claim 2, characterized in that, 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.

5. The keyboard according to claim 2, characterized in that, 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, and 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.

6. The keyboard according to claim 1, characterized in that, The first spring arm has at least two first bends, and the second spring arm has at least two second bends.

7. The keyboard according to claim 6, characterized in that, The first spring arm has a first extension section located between the two first bends, and the second spring arm has a second extension section located between the two second bends. The first extension section and the second extension section are parallel to the first side and the second side of the keycap, respectively.

8. The keyboard according to claim 1, characterized in that, The first spring arm also includes a first opening, and the second spring arm also includes a second opening.

9. The keyboard according to claim 8, characterized in that, The major axes of the first opening and the second opening are parallel to the first side and the second side, respectively.

10. The keyboard according to claim 1, characterized in that, The base plate is provided with a circuit board, which includes a plurality of trigger switches. Each keycap has a trigger part disposed on the bottom surface and corresponds to one of the plurality of trigger switches.

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