CN116705535A - Keyboard device - Google Patents

Abstract

A keyboard device comprises a substrate and a composite key structure. The substrate is provided with an assembly area, and the assembly area is provided with a first assembly piece and a second assembly piece. The composite key structure is arranged on the assembly area and comprises a key cap, a first linkage piece and a second linkage piece which are integrally combined with each other, the key cap comprises a first side and a second side, the first linkage piece comprises a first connecting side and a first assembly side, a first flexible part is integrally connected between the first connecting side and the first side, the first assembly side is movably connected to the first assembly piece, the second linkage piece comprises a second connecting side and a second assembly side, a second flexible part is integrally connected between the second connecting side and the second side, and the second assembly side is movably connected to the second assembly piece of the substrate.

Description

Keyboard device

Technical Field

The present invention relates to an input device, and more particularly, to a keyboard device.

Background

A keyboard is one of the common input devices of the present electronic devices, and is often used for operating or inputting characters in computer products (such as notebook computers, desktop computers or tablet computers) or industrial large-scale control devices or processing devices which are commonly contacted in daily life.

Generally, the key structure of the keyboard mainly includes a key cap, a linkage assembly (e.g. a scissor-type connector) and a bottom plate, wherein the linkage assembly is assembled between the key cap and the bottom plate for supporting the key cap and guiding the key cap to lift. However, each component (key cap, linkage assembly and base plate) of the key structure needs to be produced by using different dies, and thus has a problem of high manufacturing cost. In addition, in the assembly process of the key structure, the linkage assembly is assembled firstly and then is assembled to the key cap and the bottom plate respectively, so that the defect of high labor cost is overcome.

Disclosure of Invention

In view of the foregoing, in an embodiment, a keyboard device is provided that includes a substrate and a composite key structure. The substrate comprises a top surface, the top surface is provided with an assembly area, and the assembly area is provided with a first assembly piece and a second assembly piece. The composite key structure is arranged on the assembly area and comprises a key cap, a first linkage piece and a second linkage piece which are integrally combined with each other, wherein the key cap comprises a first side and a second side which are opposite to each other, the first linkage piece comprises a first connecting side and a first assembly side which are opposite to each other, a first flexible part is integrally connected between the first connecting side and the first side of the key cap, the first linkage piece can swing relative to the key cap, the first assembly side is movably connected to the first assembly piece of the base plate, a first pivoting piece is arranged between the first connecting side and the first assembly side, the second linkage piece comprises a second connecting side and a second assembly side which are opposite to each other, the second flexible part is integrally connected between the second connecting side and the second side of the key cap, the second linkage piece can swing relative to the key cap, the second assembly side is movably connected to the second assembly piece of the base plate, and a second pivoting piece is arranged between the second connecting side and the second assembly side, and the second pivoting piece is pivoted to the first pivoting piece of the first linkage piece.

In summary, according to the keyboard device of the embodiment of the invention, the key cap, the first linkage member and the second linkage member of the composite key structure are integrally combined, so that the whole composite key structure can be produced by the same set of dies. In addition, in the assembly process, the first linkage piece and the second linkage piece can be assembled only by being mounted on the substrate after being combined, so that the effects of reducing the manufacturing and labor cost are achieved.

Drawings

FIG. 1 is a perspective view of an embodiment of a keyboard apparatus of the present invention;

FIG. 2 is a partially exploded perspective view of one embodiment of a keyboard apparatus of the present invention;

FIG. 3 is a partial cross-sectional view of one embodiment of a keyboard apparatus of the present invention;

FIG. 4 is an actuation diagram of one embodiment of a keyboard apparatus according to the present invention;

FIG. 5 is a perspective view of a first embodiment of a composite key structure of the present invention;

FIG. 6 is a cross-sectional view of a first embodiment of a composite key structure of the present invention;

FIG. 7 is an assembled schematic view of a first embodiment of a composite key structure according to the present invention;

FIG. 8 is a plan view of a second embodiment of a composite key structure of the present invention;

FIG. 9 is a plan view of a third embodiment of a composite key structure of the present invention;

FIG. 10 is a cross-sectional view of a fourth embodiment of a composite key structure of the present invention;

FIG. 11 is a cross-sectional view of a fifth embodiment of a composite key structure of the present invention;

FIG. 12 is a cross-sectional view of a sixth embodiment of a composite key structure of the present invention;

FIG. 13 is a cross-sectional view of a seventh embodiment of a composite key structure of the present invention;

FIG. 14 is a cross-sectional view of an eighth embodiment of a composite key structure of the present invention;

fig. 15 is a cross-sectional view of a ninth embodiment of the composite key structure of the present invention.

[ symbolic description ]

1 keyboard device

10 substrate

11 top surface

12 assembly area

121 first Assembly

122 second assembly

20 composite key structure

21 keycap

211 first side

212 second side

213 cover plate

214 hat brim

215 a-251 e caulking groove

2151 opening

2152 groove bottom

216,216': first caulking groove

217,217': second caulking groove

23 first linkage member

231 first connection side

232 first assembling side

2321 first shaft lever

233 first pivoting member

234 elongated slot

2341 arcuate surfaces

235 assembly port

236 guide ramp

24,24',24a to 24e, first flexible portion

241 first hollowed-out part

242a to 242e, first fitting portion

25 second linkage member

251 second connection side

252 second assembled side

2521 second shaft

253 second pivot joint

26 second flexible portion

261 second hollowed-out part

Detailed Description

It should be noted that, in the descriptions of the embodiments, the terms "first" and "second" are used to describe different elements, and these elements are not limited by such predicates. Moreover, for the sake of convenience and clarity, the thickness or dimensions of each element in the drawings are shown in exaggerated or omitted or simplified form for the understanding and reading of those skilled in the art, and the dimensions of each element are not all the exact dimensions and are not intended to limit the applicable limitations of the present invention, so that any modification of the structure, variation of the scale, or adjustment of the size of the elements should fall within the scope of the technical disclosure without affecting the efficacy and achievement of the present invention. The same reference numbers will be used throughout the drawings to refer to the same or like elements.

Fig. 1 is a perspective view of an embodiment of a keyboard apparatus according to the present invention, and fig. 2 is a partially exploded perspective view of an embodiment of a keyboard apparatus according to the present invention. As shown in fig. 1 and 2, the keyboard apparatus 1 of the present embodiment includes a substrate 10 and a plurality of composite key structures 20. The keyboard device 1 can be applied to various electronic products (such as input devices of desktop computers, notebook computers or other electronic devices) for being pressed by a user to generate corresponding signals.

As shown in fig. 1 and 2, the substrate 10 may be a hard plate made of metal (e.g. iron, aluminum, or alloy) or plastic, and the substrate 10 includes a top surface 11, and the top surface 11 has a plurality of assembly regions 12, wherein each assembly region 12 is a region (e.g. square region as shown in fig. 2) of the substrate 10 for corresponding assembly of each composite key structure 20. Taking one assembly area 12 as an example, at least one first assembly 121 and at least one second assembly 122 may be disposed on the assembly area 12. In the present embodiment, the number of the first assemblies 121 is two, the two first assemblies 121 are disposed at intervals and adjacent to one side of the assembly area 12, the number of the second assemblies 122 is also two, and the two second assemblies 122 are disposed at intervals and adjacent to the other side of the assembly area 12.

In the embodiment, as shown in fig. 2, each of the first assembly 121 and each of the second assembly 122 are hooks (here, L-shaped hooks, but may be U-shaped hooks or T-shaped hooks) integrally bent and extended from the substrate 10, but this is not a limitation, and each of the first assembly 121 and each of the second assembly 122 may be separate components and assembled on the assembly area 12 of the substrate 10.

Fig. 3 is a partial cross-sectional view of an embodiment of the keyboard apparatus of the present invention, and fig. 4 is an actuation diagram of an embodiment of the keyboard apparatus of the present invention. As shown in fig. 2 to 4, taking one of the composite key structures 20 as an example, the composite key structure 20 is disposed above the assembly area 12 and includes a keycap 21, a first linkage member 23 and a second linkage member 25 that are integrally combined with each other, for example, the keycap 21, the first linkage member 23 and the second linkage member 25 may be integrally manufactured by Casting (Casting) or injection molding (Injection Molding) instead of separate components.

As shown in fig. 2 to 4, the key cap 21 has a first side 211 and a second side 212, wherein the first side 211 and the second side 212 are opposite sides of the key cap 21, and in this embodiment, the key cap 21 includes a cover 213 and a cap peak 214, the cover 213 covers the first assembly 121 and the second assembly 122 on the assembly area 12, and the cap peak 214 is integrally connected around the cover 213 and protrudes toward the substrate 10.

As shown in fig. 2 to 4, the first linkage member 23 includes a first connecting side 231 and a first assembling side 232 opposite to each other, and a first flexible portion 24 is integrally connected between the first connecting side 231 and the first side 211 of the key cap 21, so that the first linkage member 23 can swing relative to the key cap 21 based on the flexible property of the first flexible portion 24, wherein the thickness of the first flexible portion 24 may be smaller than the thickness of the first linkage member 23 and the key cap 21, for example, the thickness of the first flexible portion 24 may be smaller than half the thickness of the first linkage member 23, so that the first flexible portion 24 has better flexibility.

As shown in fig. 2 to 4, the first assembling side 232 of the first linkage member 23 is movably connected to the first assembling member 121 of the substrate 10, where the first assembling side 232 of the first linkage member 23 has two first shafts 2321, and the two first shafts 2321 are respectively hooked on the two first assembling members 121, so that the first assembling side 232 can rotate or/and slide relative to the two first assembling members 121.

As shown in fig. 2 to 4, the second linking member 25 includes a second connecting side 251 and a second assembling side 252 opposite to each other, and the second flexible portion 26 is integrally connected between the second connecting side 251 and the second side 212 of the key cap 21, so that the second linking member 25 can swing relative to the key cap 21 based on the flexible property of the second flexible portion 26, wherein the thickness of the second flexible portion 26 may be smaller than the thickness of the second linking member 25 and the key cap 21, for example, the thickness of the second flexible portion 26 may be smaller than half the thickness of the second linking member 25, so that the second flexible portion 26 may have better flexibility.

As shown in fig. 2 to 4, the second assembly side 252 of the second linkage member 25 is movably connected to the second assembly 122 of the substrate 10, where the second assembly side 252 of the second linkage member 25 has two second shafts 2521, and the two second shafts 2521 are respectively hooked on the second assembly 122, so that the second assembly side 252 can rotate or/and slide relative to the two second assemblies 122.

As shown in fig. 2 to 4, at least one first pivot member 233 is further disposed between the first connecting side 231 and the first assembling side 232 of the first linking member 23, and a second pivot member 253 is further disposed between the second connecting side 251 and the second assembling side 252 of the second linking member 25, where the second pivot member 253 of the second linking member 25 is pivotally disposed on the first pivot member 233 of the first linking member 23, so that the first linking member 23 and the second linking member 25 can swing relatively with respect to each other about the positions of the first pivot member 233 and the second pivot member 253 as axes.

Fig. 5 is a perspective view of a first embodiment of the composite key structure of the present invention, and fig. 6 is a cross-sectional view of the first embodiment of the composite key structure of the present invention. As shown in fig. 3, 5 and 6, the first linking member 23 and the second linking member 25 may be scissor type linking members (scisssor), in this embodiment, the first linking member 23 is an outer frame (herein, a rectangular frame), the second linking member 25 is an inner frame (herein, a rectangular frame), and the size of the first linking member 23 is larger than the size of the second linking member 25, so that the first linking member 23 can be sleeved outside the second linking member 25. Here, the first linkage member 23 is provided with two first pivoting members 233, the two first pivoting members 233 are respectively located at two opposite sides of the first linkage member 23, each first pivoting member 233 includes a long slot 234, the second linkage member 25 is provided with two second pivoting members 253, the two second pivoting members 253 are respectively located at two opposite sides of the second linkage member 25, and each second pivoting member 253 is pivoted to be pivotally located in the long slot 234, so that each second pivoting member 253 can slide and rotate relative to the long slot 234.

Accordingly, as shown in fig. 3, when the key cap 21 is not pressed, an elastic body (not shown) can elastically prop up at a height position to keep a distance from the substrate 10, and at this time, the first linkage member 23 and the second linkage member 25 are in an expanded state crossing each other. Referring to fig. 3 and fig. 4, when the key cap 21 is pressed and moves toward the substrate 10, the first flexible portion 24 and the second flexible portion 26 can be bent under force, so that the first linking member 23 and the second linking member 25 swing around the key cap 21 respectively, so as to drive the first assembling side 232 of the first linking member 23 to rotate or/and slide with respect to the first assembling member 121 and drive the second assembling side 252 of the second linking member 25 to rotate or/and slide with respect to the second assembling member 122. In addition, the size of the long slot 234 of the first pivot member 233 is slightly larger than that of the second pivot member 253, so that the second pivot member 253 can move with a horizontal component in the long slot 234 of the first pivot member 233, and therefore, during the swinging process of the first link member 23 and the second link member 25, the second pivot member 253 can slide and rotate relative to the long slot 234 of the first pivot member 233, as shown in fig. 3 and fig. 4, when the key cap 21 is not pressed, the second pivot member 253 is located on the right side of the long slot 234, and when the key cap 21 is pressed, the second pivot member 253 slides to the left side of the long slot 234, so that the first link member 23 and the second link member 25 can swing relative to each other (as shown in fig. 4), and the key cap 21 can smoothly descend close to the substrate 10.

In summary, according to the keyboard device 1 of the embodiment of the present invention, the key cap 21, the first linking member 23 and the second linking member 25 of the composite key structure 20 are integrally formed, so that the key cap 21, the first linking member 23 and the second linking member 25 can be produced by the same set of dies, thereby achieving the advantage of greatly reducing the manufacturing cost. In addition, in the assembly process, the first linkage member 23 and the second linkage member 25 are combined and then only need to be mounted on the substrate 10 to complete the assembly operation, so as to achieve the effect of reducing the labor cost.

Fig. 7 is an assembly schematic diagram of a first embodiment of the composite key structure of the present invention. As shown in fig. 5 and fig. 6, after the key cap 21, the first linkage member 23 and the second linkage member 25 of the composite key structure 20 are integrally manufactured, the three components can be arranged side by side and located on the same plane, but the invention is not limited thereto. As shown in fig. 5 to 7, in the assembly process, only the first linkage member 23 and the second linkage member 25 are controlled to be folded towards the bottom of the keycap 21, so that the first linkage member 23 and the second linkage member 25 are close to each other and pivoted to each other by the first pivoting member 233 and the second pivoting member 253, thereby achieving the advantages of rapid and convenient assembly. Then, the first assembly side 232 of the first linkage 23 is assembled to the first assembly 121 on the substrate 10, and the second assembly side 252 of the second linkage 25 is assembled to the second assembly 122 on the substrate 10, so as to complete the assembly operation. Therefore, after the first linking member 23 and the second linking member 25 are combined with each other, no manpower is required to be expended to assemble the key cap 21, so that the assembly process and the labor cost are reduced, and the key cap 21 does not need to be provided with a member for installing the first linking member 23 and the second linking member 25, thereby further reducing the material cost.

As shown in fig. 7, in the present embodiment, the first pivot member 233 of the first connecting member 23 further includes an assembling opening 235, the assembling opening 235 is connected to the elongated slot 234, and the width of the assembling opening 235 is smaller than the width of the second pivot member 253, for example, the width of the assembling opening 235 may be 1/2-4/5 of the width of the second pivot member 253. Therefore, in the assembly process of the first linking member 23 and the second linking member 25, an assembler can apply force to pass the second pivoting member 253 through the assembly opening 235 to be buckled in the long groove 234 of the first pivoting member 233, so as to avoid the situation that the second pivoting member 253 is separated from the long groove 234 in the actuation process.

As shown in fig. 7, in the present embodiment, the first linkage member 23 further includes at least one guiding inclined surface 236, and the guiding inclined surface 236 is connected to an edge of the assembling opening 235. Therefore, during the assembly process of the first linking member 23 and the second linking member 25, the second pivoting member 253 can smoothly move towards the assembly opening 235 through the guiding of the guiding inclined plane 236 and pass through the assembly opening 235 to be buckled in the long slot 234, and the interference between the first linking member 23 and the second linking member 25 during the assembly is reduced. In addition, in the present embodiment, the elongated slot 234 further has an arc surface 2341, and in addition, as shown in fig. 3 and 4, the first linking member 23 and the second linking member 25 slide along the arc surface 2341 relative to the elongated slot 234 during the process of swinging and folding, that is, the arc surface 2341 can conform to the moving path of the pivoting member 253, so that the pivoting member 253 can be more stable and interference with the elongated slot 234 during the sliding process can be reduced.

As shown in fig. 3, 4 and 6, in the present embodiment, the first flexible portion 24 and the second flexible portion 26 are integrally connected to the visor 214 near the bottom of the substrate 10, so that the bending amplitude of the first flexible portion 24 and the second flexible portion 26 can be reduced and the stress applied to the first flexible portion 24 and the second flexible portion 26 can be reduced during the assembly and actuation of the composite key structure 20, thereby facilitating the assembly of the first linking member 23 and the second linking member 25 and prolonging the service life of the first linking member. However, the above embodiment is merely an example, and the first flexible portion 24 and the second flexible portion 26 may be integrally connected to different positions (e.g. the edge of the cover 213) of the key cap 21, which is not limited thereto.

Fig. 8 is a plan view of a second embodiment of the composite key structure of the present invention, and fig. 9 is a plan view of a third embodiment of the composite key structure of the present invention. As shown in fig. 8, in the present embodiment, the first flexible portion 24 may be provided with at least one first hollow portion 241 (the first hollow portion 241 is a hollow hole), and the second flexible portion 26 may be provided with at least one second hollow portion 261 (the second hollow portion 261 is a hollow hole). Therefore, when the keycap 21 is pressed to drive the first flexible portion 24 and the second flexible portion 26 to bend, the first hollowed-out portion 241 and the second hollowed-out portion 261 can reduce stress applied to the first flexible portion 24 and the second flexible portion 26, so as to increase the service life of the first flexible portion 24 and the second flexible portion 26.

Alternatively, as shown in fig. 9, in the present embodiment, the number of the first hollow portions 241 of the first flexible portion 24 may be plural, and the plural first hollow portions 241 may be disposed at intervals, the number of the second hollow portions 261 of the second flexible portion 26 may be plural, and the plural second hollow portions 261 may be disposed at intervals. Therefore, compared with the embodiment of fig. 8, the hollow areas of the first flexible portion 24 and the second flexible portion 26 can be reduced, so that when the keycap 21 is pressed to drive the first flexible portion 24 and the second flexible portion 26 to bend, the stress applied to the first flexible portion 24 and the second flexible portion 26 can be reduced, and a certain connection strength can be maintained between the first flexible portion 24, the second flexible portion 26 and the keycap 21.

In some embodiments, the key cap 21, the first linkage member 23, the first flexible portion 24, the second linkage member 25, and the second flexible portion 26 may be made of the same resin material, such as Polycarbonate (PC), polypropylene (PP), acrylonitrile-butadiene-styrene (Acrylonitrile Butadiene Styrene, ABS), polymethyl methacrylate (PMMA), or a synthetic resin material mixed by at least two of the above materials.

In some embodiments, the key cap 21, the first linking member 23, the first flexible portion 24, the second linking member 25 and the second flexible portion 26 can also be made of different materials by two-material injection molding (as shown in fig. 10 to 15). For example, as shown in fig. 10, in the present embodiment, the first linkage member 23 and the first flexible portion 24 'are made of the same material, and the key cap 21 and the first flexible portion 24' are made of different materials.

Alternatively, in some embodiments, the first linking member 23 and the key cap 21 may be made of the same material, and the first flexible portion 24 is made of different materials. For example, as shown in fig. 11, in the present embodiment, the key cap 21 has a caulking groove 215a, where the caulking groove 215a is a long groove and is disposed on the first side 211 of the key cap 21, the first flexible portion 24a is made of different materials from the key cap 21, and the first flexible portion 24a has a first fitting portion 242a. After the process of injection molding, the first engaging portion 242a of the first flexible portion 24a may be integrally engaged in the engaging groove 215a, so as to increase the bonding area between the first flexible portion 24a and the key cap 21, thereby improving the connection strength between the first flexible portion 24a and the key cap 21 to further increase the service life.

As shown in fig. 12, in the present embodiment, the key cap 21 has a caulking groove 215b, wherein the caulking groove 215b is a triangle groove and is disposed on the first side 211 of the key cap 21, the first flexible portion 24b is made of different materials from the key cap 21, and the first flexible portion 24b has a first fitting portion 242b. After the two-material injection molding process, the first engaging portion 242b of the first flexible portion 24b may be integrally engaged in the engaging groove 215b, so as to increase the bonding area between the first flexible portion 24b and the key cap 21. In addition, the triangular shape of the caulking groove 215b can further improve the drawing resistance of the first flexible portion 24b, so as to improve the connection strength between the first flexible portion 24b and the key cap 21 to further increase the service life.

As shown in fig. 13, in the present embodiment, the key cap 21 has a caulking groove 215c, wherein a cross section of the caulking groove 215c has an opening 2151 and a groove bottom 2152, and a width of the opening 2151 is smaller than a width of the groove bottom 2152 to form a shape of the caulking groove 215c with a narrow outside and a wide inside, the first flexible portion 24c and the key cap 21 are made of different materials, and the first flexible portion 24c has a first engaging portion 242c. After the process of injection molding, the first engaging portion 242c of the first flexible portion 24c may be integrally engaged in the caulking groove 215c, so as to increase the bonding area between the first flexible portion 24c and the key cap 21, and in addition, the caulking groove 215c is in a form of being narrow outside and wide inside, so that the drawing resistance of the first flexible portion 24c can be further improved, and the connection strength between the first flexible portion 24c and the key cap 21 can be further improved, so as to further increase the service life.

As shown in fig. 14, in the present embodiment, the key cap 21 has a slot 215d, where the slot 215d includes a first slot 216 and a second slot 217 that are disposed at intervals, the first flexible portion 24d and the key cap 21 are made of different materials, and the first flexible portion 24d has a first engaging portion 242d. After the process of injection molding, the first engaging portion 242d is engaged with the first engaging groove 216 and the second engaging groove 217, so that the first engaging portion 242d is engaged with the plurality of engaging grooves (the first engaging groove 216 and the second engaging groove 217), so as to further increase the bonding area between the first flexible portion 24d and the key cap 21, thereby improving the connection strength between the first flexible portion 24d and the key cap 21 and further increasing the service life.

As shown in fig. 15, in the present embodiment, the key cap 21 has a caulking groove 215e, where the caulking groove 215e includes a first caulking groove 216 'and a second caulking groove 217' that are disposed at a distance from each other, and the depth of the first caulking groove 216 'is different from the depth of the second caulking groove 217' (where the depth of the first caulking groove 216 'is greater than the depth of the second caulking groove 217'), and the first flexible portion 24e and the key cap 21 are made of different materials, and the first flexible portion 24e has a first fitting portion 242e. After the process of injection molding, the first engaging portion 242e is engaged with the first engaging groove 216 'and the second engaging groove 217', so that the first engaging portion 242e is engaged with the plurality of engaging grooves (the first engaging groove 216 'and the second engaging groove 217') with different depths, so that the combination area between the first flexible portion 24e and the key cap 21 can be increased, and the pulling resistance of the first flexible portion 24e can be further improved, thereby improving the connection strength between the first flexible portion 24e and the key cap 21 to further increase the service life.

As shown in fig. 10 to 15, in the embodiment in which the first flexible portions 24',24a to 24e and the key cap 21 are made of different materials, the first flexible portions 24',24a to 24e may be made of a material with higher strength or better flexibility to further increase the service life. For example, the first flexible portions 24',24 a-24 e may be made of rubber, silicone or plastic-steel (POM), wherein the plastic-steel material has high rigidity, good elasticity and can bear high load and stress, so that the service life of the first flexible portions 24',24 a-24 e can be more effectively prolonged. In some embodiments, the second flexible portion 26 may be made of a different material from the key cap 21, and the second flexible portion 26 may be made of the same material as the first flexible portions 24',24 a-24 e, which will not be repeated here.

In summary, according to the keyboard device of the embodiment of the invention, the key cap, the first linkage member and the second linkage member of the composite key structure are integrally combined, so that the whole composite key structure can be produced by the same set of dies. In addition, in the assembly process, the first linkage piece and the second linkage piece can be assembled only by being mounted on the substrate after being combined, so that the effects of reducing the manufacturing and labor cost are achieved.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited thereto, but rather, it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention.

Claims (15)

1. A keyboard apparatus, comprising:

the substrate comprises a top surface, wherein the top surface is provided with an assembly area, and a first assembly piece and a second assembly piece are arranged on the assembly area; and

a composite key structure arranged on the assembly area and comprising a key cap, a first linkage piece and a second linkage piece which are integrated with each other, wherein,

the key cap comprises a first side and a second side which are opposite to each other;

the first linkage piece comprises a first connecting side and a first assembling side which are opposite to each other, a first flexible part is integrally connected between the first connecting side and the first side of the keycap, so that the first linkage piece can swing relative to the keycap, the first assembling side is movably connected to the first assembling piece of the substrate, and a first pivoting piece is arranged between the first connecting side and the first assembling side;

the second linkage piece comprises a second connecting side and a second assembling side which are opposite to each other, a second flexible part is integrally connected between the second connecting side and the second side of the keycap, so that the second linkage piece can swing relative to the keycap, the second assembling side is movably connected to the second assembling piece of the substrate, a second pivoting piece is arranged between the second connecting side and the second assembling side, and the second pivoting piece is pivoted on the first pivoting piece of the first linkage piece.

2. The keyboard device of claim 1, wherein the key cap comprises a cover plate and a cap peak, the cap peak is connected to the periphery of the cover plate and extends toward the direction of the base plate, and the first flexible portion and the second flexible portion are integrally connected to the cap peak.

3. The keyboard device of claim 1, wherein a thickness of the first flexible portion is less than a thickness of the first linkage member.

4. The keyboard device of claim 1, wherein the first flexible portion is provided with at least one first hollow portion.

5. The keyboard device of claim 4, wherein the at least one first hollow portion is plural in number, and the first hollow portions are disposed at intervals.

6. The keyboard device of claim 1, wherein the first flexible portion and the keycap are injection molded with two materials, such that the material of the first flexible portion is different from the material of the keycap.

7. The keyboard device of claim 6, wherein the first linkage member is made of the same material as the key cap.

8. The keyboard device of claim 6, wherein the key cap has a slot, and the first flexible portion has a first engaging portion, and the first engaging portion is engaged in the slot.

9. The keyboard device of claim 8, wherein the cross section of the caulking groove has an opening and a groove bottom, and the width of the opening is smaller than the width of the groove bottom.

10. The keyboard device of claim 6, wherein the key cap has a first slot and a second slot, the first flexible portion has a first engaging portion, and the first engaging portion is engaged with the first slot and the second slot.

11. The keyboard apparatus of claim 10, wherein a depth of the first bezel is different from a depth of the second bezel.

12. The keyboard device of claim 1, wherein the first pivot of the first link comprises a slot, and the second pivot is pivotally disposed in the slot and is capable of sliding relative to the slot.

13. The keyboard device of claim 12, wherein the first pivot further comprises an assembly opening, the assembly opening is connected to the elongated slot, and a width of the assembly opening is smaller than a width of the second pivot.

14. The keyboard device of claim 13, wherein the first linkage member further comprises at least one guiding slope, the at least one guiding slope being connected to an edge of the assembly opening.

15. The keyboard device of claim 12, wherein the elongated slot further has an arcuate surface therein, and the second pivot member slides along the arcuate surface relative to the elongated slot.