Keyboard device

Abstract

A keyboard device comprises a substrate, a circuit layer, a pressure sensing piece and a key assembly. The substrate is provided with a top surface and a bottom surface, the top surface is provided with an assembling area, the assembling area is provided with a through hole, and the through hole penetrates through the top surface and the bottom surface. The circuit layer is stacked below the bottom surface, and the surface of the circuit layer is provided with a conductive circuit. The pressure sensing member is located between the bottom surface and the circuit layer, the pressure sensing member is connected to the conductive circuit, and the position of the pressure sensing member corresponds to the through hole. The key assembly is arranged above the assembly area, the key assembly comprises a key cap and an elastic reset piece, the elastic reset piece is located between the key cap and the substrate, the elastic reset piece is provided with a top and a bottom, the top is in contact with the key cap, and the bottom corresponds to the pressure sensing piece.

Description

Technical Field

[0001] The present invention relates to an input device, in particular to a keyboard device. Background Art

[0002] Keyboards are currently very common input devices, which are usually used in conjunction with electronic devices, such as desktop computers, notebook computers, smart phones, tablet computers, etc.

[0003] Currently, keyboards on the market mainly use multi-layer trigger circuit boards to sense whether a key is pressed or not. For example, the trigger circuit board includes an upper circuit layer, a spacer layer, and a lower circuit layer stacked on each other, and the trigger circuit board is arranged on top of a bottom plate. However, this stacking structure not only increases the thickness of the keyboard and is not conducive to the development trend of thinness, but also requires holes to be set in the trigger circuit board so that the bottom plate can be assembled with other components above it. Summary of the invention

[0004] In view of the above, in one embodiment of the present invention, a keyboard device is provided, including a substrate, a circuit layer, a pressure sensing element and a key assembly. The substrate has a top surface and a bottom surface, the top surface has an assembly area, the assembly area has a through hole, and the through hole runs through the top surface and the bottom surface. The circuit layer is stacked below the bottom surface, and the surface of the circuit layer has a conductive circuit. The pressure sensing element is located between the bottom surface and the circuit layer, the pressure sensing element is connected to the conductive circuit, and the position of the pressure sensing element corresponds to the through hole. The key assembly is arranged above the assembly area, the key assembly includes a keycap and an elastic return element, the elastic return element is located between the keycap and the substrate, the elastic return element has a top and a bottom, the top contacts the keycap, and the bottom corresponds to the pressure sensing element.

[0005] In one embodiment of the present invention, the pressure sensing element is disposed on the surface of the circuit layer. In one embodiment of the present invention, the circuit layer has a light emitting element, and the position of the light emitting element corresponds to the through hole.

[0006] In one embodiment of the present invention, the keyboard device further includes a protection layer, which is stacked on the bottom surface of the substrate, and the circuit layer is stacked below the protection layer.

[0007] In one embodiment of the present invention, the protection layer has an upper surface and a lower surface, the upper surface is fixed to the bottom surface of the substrate, and the pressure sensing element is disposed on the lower surface.

[0008] In one embodiment of the present invention, the protection layer has a through hole, and the light-emitting element of the circuit layer is located in the through hole.

[0009] In one embodiment of the present invention, the width of the top of the elastic return element is greater than the width of the bottom.

[0010] In one embodiment of the present invention, the top of the elastic return member has an inner groove, the surface of the key cap contacting the top has an exhaust groove, and the exhaust groove is connected to the inner space of the inner groove.

[0011] In one embodiment of the present invention, the circuit layer has a light emitting member, the position of the light emitting member corresponds to the through hole, and the bottom of the elastic reset member has a light guiding groove, the position of the light guiding groove corresponds to the light emitting member.

[0012] In one embodiment of the present invention, the cross-section of the light guide groove has a curved edge and an opening, the opening faces the light-emitting component, the curved edge includes a first side edge, a central arc edge and a second side edge, the central arc edge is connected between the first side edge and the second side edge, and the curvature of the central arc edge is different from the curvature of the first side edge or the second side edge.

[0013] In one embodiment of the present invention, the curvature of the central arc edge is greater than the curvature of the first side edge and the curvature of the second side edge.

[0014] In one embodiment of the present invention, the width of the bottom of the elastic reset member is greater than that of the top, the bottom has an inner groove, the circuit layer has an exhaust hole, and the exhaust hole is connected to the inner space of the inner groove.

[0015] In one embodiment of the present invention, the keyboard device also includes a base, which is arranged below the circuit layer. The base includes a bottom wall and a circumferential wall. The circumferential wall protrudes and surrounds the bottom wall. A gas channel is formed between the circumferential wall and the bottom wall. The gas channel is connected to the exhaust hole, and the circumferential wall contacts the circuit layer.

[0016] In one embodiment of the present invention, the base includes a support rib connected to the bottom wall and located in the gas channel, the support rib contacts the circuit layer, and the position of the support rib corresponds to the bottom of the elastic reset member.

[0017] In one embodiment of the present invention, the circumferential wall has an exhaust groove, and the exhaust groove is connected to the gas channel.

[0018] In summary, according to the keyboard device of the embodiment of the present invention, the circuit layer is stacked under the substrate, so that the circuit layer does not need to be provided with holes and the space for circuit arrangement is increased. In addition, by providing a pressure sensing element on the circuit layer to provide a press trigger sensing, it is not necessary to provide a traditional multi-layer trigger circuit board, thereby reducing the overall thickness of the keyboard device and reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of an embodiment of a keyboard device of the present invention.

[0020] Figure 2 It is an exploded perspective view of an embodiment of a keyboard device of the present invention.

[0021] Figure 3 It is a cross-sectional view of an embodiment of a keyboard device of the present invention.

[0022] Figure 4 It is another exploded perspective view of an embodiment of the keyboard device of the present invention.

[0023] Figure 5 yes Figure 3 A partial enlarged view of .

[0024] Figure 6 It is a cross-sectional view of a keyboard device according to an embodiment of the present invention.

[0025] Figure 7 is a cross-sectional view of another embodiment of the keyboard device of the present invention.

[0026] Figure 8 It is an exploded perspective view of another embodiment of the keyboard device of the present invention.

[0027] Fig. 9 is a cross-sectional view of another embodiment of the keyboard device of the present invention.

[0028] Fig.10 It is a cross-sectional view of another embodiment of the keyboard device of the present invention.

[0029] Explanation of symbols:

[0030] 1: Keyboard device

[0031] 10:Substrate

[0032] 11: Top surface

[0033] 12: Assembly area

[0034] 13:Through hole

[0035] 15: Bottom

[0036] 20: Protective layer

[0037] 21: Pressure sensing device

[0038] 22: Upper surface

[0039] 23: Lower surface

[0040] 24:Through hole

[0041] 25: First exhaust hole

[0042] 30: Circuit layer

[0043] 31: Luminous parts

[0044] 32: Conductive circuit

[0045] 321: Conductive contacts

[0046] 35: Second exhaust hole

[0047] 40: Button assembly

[0048] 41:Keycap

[0049] 411: Exhaust groove

[0050] 42: Linking parts

[0051] 45,45a: Elastic reset element

[0052] 46,46a: Top

[0053] 461: Inner groove

[0054] 462:convex part

[0055] 47,47a: bottom

[0056] 471a: Inner groove

[0057] 48: Light guide groove

[0058] 481: Curved Edge

[0059] 482: first side edge

[0060] 483:Central arc edge

[0061] 484: Second side edge

[0062] 485: Opening

[0063] 50: Base

[0064] 51: Bottom wall

[0065] 52: Circumferential wall

[0066] 521: Exhaust slot

[0067] 53: Gas channel

[0068] 54: Support rib

[0069] 60: Support seat

[0070] 61: Bottom wall

[0071] 62: Circumferential wall

[0072] 64: Support rib DETAILED DESCRIPTION

[0073] It should be noted that in the description of each embodiment, the so-called "first" and "second" are used to describe different elements, and these elements are not limited by such predicates. In addition, for the convenience and clarity of the description, the thickness or size of each element in the figure is expressed in an exaggerated, omitted or schematic manner for the understanding and reading of those skilled in the art, and the size of each element is not completely its actual size, and is not used to limit the limiting conditions that the present invention can be implemented, so it has no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention. The same reference numerals will be used to represent the same or similar elements in all figures.

[0074] Figure 1 is a three-dimensional diagram of an embodiment of a keyboard device of the present invention, Figure 2 is an exploded perspective view of an embodiment of a keyboard device of the present invention, Figure 3 FIG. 2 is a cross-sectional view of an embodiment of a keyboard device of the present invention. Figures 1 to 3 As shown, the keyboard device 1 includes a substrate 10 , a protection layer 20 , a circuit layer 30 , a pressure sensing element 21 and at least one key assembly 40 . In this embodiment, there are multiple key assemblies 40 and they are respectively arranged on the substrate 10 .

[0075] like Figures 1 to 3 As shown, the substrate 10 can be a hard plate made of metal (such as aluminum, steel, alloy, etc.) or plastic material and has the function of supporting components. In this embodiment, the substrate 10 has a top surface 11 and a bottom surface 15. The top surface 11 has a plurality of assembly areas 12, wherein each assembly area 12 is a local area of ​​the top surface 11 for corresponding assembly of each key assembly 40 (for example Figure 2 In the figure, the area surrounded by a dotted chain line represents the assembly area 12, that is, the number of the assembly areas 12 corresponds to the number of the key assemblies 40. In addition, each assembly area 12 also has a through hole 13, and the through hole 13 passes through the top surface 11 and the bottom surface 15 of the substrate 10.

[0076] like Figures 1 to 3 As shown, the protective layer 20 is stacked on the bottom surface 15 of the substrate 10, wherein the protective layer 20 can be a plastic film layer, for example, the protective layer 20 can be a film made of plastic such as PET (Polyethylene terephthalate), PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene) or PP (Polypropylene). In addition, the surfaces adjacent to the protective layer 20 and the substrate 10 can be fixed by adhesion, but this is not limited to this.

[0077] like Figures 1 to 3 As shown, the circuit layer 30 is stacked under the protective layer 20. In this embodiment, the circuit layer 30 is a single-layer thin film flexible circuit board and a single-chip printed circuit, but this is not limited. In some embodiments, the circuit layer 30 can also be a printed circuit board (PCB) or a rigid-flex PCB or other circuit boards.

[0078] like Figure 2 and Figure 3 As shown, the pressure sensing element 21 is located between the bottom surface 15 of the substrate 10 and the circuit layer 30, and the position of the pressure sensing element 21 corresponds to the position of the through hole 13 of the substrate 10, wherein the pressure sensing element 21 may be annular and disposed on the surface of the protection layer 20 or the surface of the circuit layer 30. In some embodiments, the pressure sensing element 21 may be a piezoelectric, capacitive or resistive pressure sensor, for example, the pressure sensing element 21 may be a force sensing resistor.

[0079] like Figure 2 As shown, in this embodiment, the surface of the circuit layer 30 has a plurality of conductive circuits 32, and the pressure sensing element 21 is disposed on the surface of the protective layer 20 and connected to the plurality of conductive circuits 32. For example, the pressure sensing element 21 can be an annular pressure sensing ink and printed on the surface of the protective layer 20. When the pressure sensing element 21 is subjected to pressure, a resistance value change will occur and the plurality of conductive circuits 32 will be turned on.

[0080] For example, if Figure 2 As shown, one end of each conductive circuit 32 may have a conductive contact 321, for example, the conductive contact 321 may be but not limited to a finger-shaped electrode, the conductive contacts 321 of the plurality of conductive circuits 32 are adjacent to each other but not in contact, and the pressure sensing element 21 is a ring-shaped contact and is disposed on each conductive contact 321. Thus, when the pressure sensing element 21 is pressurized, a resistance change occurs, so that the plurality of conductive circuits 32 located on both sides of each conductive contact 321 are connected to each other.

[0081] Or, if Figure 4 As shown, in this embodiment, the pressure sensing element 21 is disposed on the surface of the circuit layer 30 facing the substrate 10 and connected to the plurality of conductive lines 32. For example, the pressure sensing element 21 may be a ring-shaped pressure sensing ink and printed on the surface of the circuit layer 30. When the pressure sensing element 21 is pressed, the resistance value changes and the plurality of conductive lines 32 are turned on. In addition, the surface of the circuit layer 30 may be coated with an insulating adhesive layer (omitted in this figure) to achieve a waterproof and dustproof effect, wherein the insulating adhesive layer may be directly adhered and fixed to the protective layer 20, or the keyboard device 1 may also omit the provision of the protective layer 20, so that the insulating adhesive layer is directly adhered and fixed to the bottom surface 15 of the substrate 10.

[0082] like Figures 1 to 3 As shown, in this embodiment, the surface of the circuit layer 30 may have at least one light emitting element 31, for example, the light emitting element 31 may be attached to the surface of the circuit layer 30 by surface-mount technology (SMT), but this is not limited. In addition, the number of the light emitting elements 31 corresponds to the number of the through holes 13 of the substrate 10, and the position of the light emitting element 31 corresponds to the position of the through hole 13, for example, the light emitting element 31 may be located within the range of the through hole 13.

[0083] like Figures 1 to 3 As shown, taking one of the key components 40 as an example, the key component 40 is disposed above the assembly area 12 of the substrate 10, and the key component 40 includes a key cap 41 and an elastic reset member 45, the elastic reset member 45 is located between the key cap 41 and the substrate 10, and the elastic reset member 45 has a top 46 and a bottom 47, wherein the top 46 contacts the key cap 41, the bottom 47 is located in the through hole 13 and contacts the protective layer 20, and the position of the bottom 47 corresponds to the position of the pressure sensing member 21. In some embodiments, the elastic reset member 45 can be a rubber dome or a metal dome.

[0084] like Figure 2 and Figure 3 As shown, in this embodiment, the key assembly 40 further includes a linking member 42, which is arranged between the assembly area 12 of the substrate 10 and the key cap 41, wherein the linking member 42 can be a scissor-type connector (such as Figure 2 As shown), a butterfly connector or a connecting rod of other shapes, one end of the connecting member 42 is movably connected to the keycap 41, and the other end of the connecting member 42 is movably connected to the substrate 10. When the keycap 41 is displaced relative to the substrate 10, the connecting member 42 can move synchronously to achieve the function of guiding and balancing the keycap 41.

[0085] Figure 5 for Figure 3 A partial enlarged view of Figure 6 FIG. 1 is a cross-sectional view of a keyboard device according to an embodiment of the present invention. Figure 3 and Figure 5 As shown, when the key cap 41 is not pressed, the key cap 41 can be elastically supported at a height position by the elastic reset member 45 to maintain a distance from the substrate 10. Figure 6As shown in FIG. 1 , when the key cap 41 is pressed and moves downward toward the substrate 10, the key cap 41 can compress the elastic reset member 45 to accumulate elastic force, and the elastic reset member 45 can press the pressure sensing member 21 to generate a resistance change, so as to judge that the key cap 41 has been pressed by the resistance change and generate a corresponding signal. In addition, when the key cap 41 is released, the elastic force accumulated by the elastic reset member 45 can cause the key cap 41 to rise and return to the original height position (such as the height of the key cap 41) when it is not pressed. Figure 5 shown).

[0086] In some embodiments, the shape of the pressure sensing element 21 may correspond to the shape of the bottom 47 of the elastic return element 45. For example, when the bottom 47 of the elastic return element 45 is annular, the shape of the pressure sensing element 21 may be annular or have multiple contacts arranged in an annular shape.

[0087] Based on the above, the embodiment of the present invention provides the keycap 41 for pressure sensing through a single-layer circuit layer 30, which can significantly reduce the thickness and manufacturing cost compared to the traditional multi-layer trigger circuit board. For example, the traditional multi-layer trigger circuit board generally has an upper circuit layer, a spacer layer and a lower circuit layer stacked on each other, while the thickness of the circuit layer 30 of the embodiment of the present invention can be only the thickness of one layer of the traditional trigger circuit board, thereby reducing the overall thickness and material cost of the keyboard device 1. In addition, by both the circuit layer 30 and the pressure sensing element 21 being disposed below the substrate 10, the circuit layer 30 can be further facilitated to be replaced and repaired. For example, when the circuit layer 30 is replaced or repaired, it is not necessary to disassemble the key assembly 40 above the substrate 10, thereby significantly reducing the cost of replacement or repair.

[0088] like Figure 3 and Figure 5 As shown, the light emitted by the light emitting element 31 of the circuit layer 30 can pass through the through hole 13 of the substrate 10 to illuminate the keycap 41, so that the entire keycap 41 or the characters on the keycap 41 can transmit light to cope with the use environment with insufficient light.

[0089] In summary, the embodiment of the present invention stacks both the protective layer 20 and the circuit layer 30 under the substrate 10, so that the protective layer 20 and the circuit layer 30 do not need to be provided with holes to avoid the assembly position of the linkage 42, thereby increasing the circuit layout space of the protective layer 20 and the circuit layer 30. In addition, by providing a light source with a light-emitting component 31 on the circuit layer 30 and providing a pressure-trigger sensing with a pressure-sensing component 21 on the protective layer 20, it is possible to eliminate the need for a backlight module and a traditional multi-layer trigger circuit board, thereby further reducing the overall thickness of the keyboard device 1 and reducing the manufacturing cost.

[0090] like Figures 2 to 4As shown, in this embodiment, at least one support seat 60 (here, multiple support seats 60 are provided to correspond to each assembly area 12) may be provided below the circuit layer 30, and the support seat 60 includes a bottom wall 61 and a circumferential wall 62, the circumferential wall 62 protrudes and surrounds the bottom wall 61, and the circumferential wall 62 contacts and bears against the circuit layer 30 to achieve the function of supporting the substrate 10, the protective layer 20 and the circuit layer 30. In addition, in this embodiment, the support seat 60 includes at least one support rib 64 (here, the number of the support ribs 64 is three and they are arranged at equal angles), each support rib 64 is connected to the bottom wall 61 and contacts the circuit layer 30, and the positions of the multiple support ribs 64 correspond to the bottom 47 of the elastic reset member 45, so as to achieve the function of supporting the elastic reset member 45, so that the force of the bottom 47 of the elastic reset member 45 pressing against the pressure sensing member 21 can be averaged to improve the accuracy of sensing.

[0091] like Figure 3 and Figure 5 As shown, in the present embodiment, the elastic reset member 45 is made of a light-transmitting material and can guide or diffuse light. The protective layer 20 has a through hole 24. The light-emitting member 31 of the circuit layer 30 is located in the through hole 24, so that the light emitted by the light-emitting member 31 will not be shielded by the protective layer 20 and can pass through the through hole 13 of the substrate 10 to irradiate the keycap 41.

[0092] However, the above embodiments are only examples. Figure 7 As shown, in another embodiment, the protective layer 20 and the circuit layer 30 may also be made of a light-transmitting material, and the light-emitting element 31 may be disposed on the surface of the circuit layer 30 away from the protective layer 20, so that the protective layer 20 does not need to be provided with a through hole 24, and the light emitted by the light-emitting element 31 can also pass through the protective layer 20 and irradiate the keycap 41. In addition, in this embodiment, since the protective layer 20 does not need to be provided with holes (such as through holes 24), the protective layer 20 can further achieve the function of protecting the circuit layer 30, preventing external dust, dirt or moisture from contacting the circuit layer 30, and having a waterproof and dustproof effect.

[0093] like Figure 3 and Figure 5 As shown, the protective layer 20 has an upper surface 22 and a lower surface 23. In this embodiment, the upper surface 22 is fixed to the bottom surface 15 of the substrate 10, and the pressure sensing element 21 is disposed on the lower surface 23, that is, the pressure sensing element 21 is located on the surface of the protective layer 20 facing the circuit layer 30. In this way, external dust, dirt or moisture can be prevented from contacting the pressure sensing element 21, thereby achieving a waterproof and dustproof effect.

[0094] like Figure 2 and Figure 5As shown, the width of the top 46 of the elastic reset member 45 is greater than the width of the bottom 47, that is, the elastic reset member 45 is wide at the top and narrow at the bottom. For example, in this embodiment, the top 46 and the bottom 47 of the elastic reset member 45 are both circular in shape, and the diameter of the top 46 is greater than the diameter of the bottom 47 (for example, the diameter of the top 46 can be 1.1 to 1.5 times the diameter of the bottom 47). In this way, the contact area between the elastic reset member 45 and the keycap 41 can be increased by the top 46 of the elastic reset member 45 with a larger width being in contact with the keycap 41, so that the keycap 41 can be more stable when being pressed and descending toward the substrate 10, and the keycap 41 can be prevented from shaking or bending, thereby providing a better operating feel.

[0095] like Figure 2 , Figure 3 and Figure 5 As shown, the top 46 of the elastic reset member 45 has an inner groove 461 and is hollow, so that the elastic reset member 45 can generate elastic deformation and accumulate elastic force when compressed by the key cap 41. In this embodiment, the surface of the top 46 of the key cap 41 that contacts the elastic reset member 45 has at least one exhaust groove 411, and the number of the exhaust grooves 411 is three and they are arranged at equal angles (such as Figure 2 As shown), one end of each exhaust groove 411 is connected to the internal space of the inner groove 461, and the other end of each exhaust groove 411 is connected to the external space of the elastic return member 45. Figure 6 As shown, when the elastic return member 45 is compressed by the key cap 41, the air in the inner groove 461 can be discharged through the exhaust grooves 411, so that the elastic return member 45 can be deformed smoothly. Therefore, the elastic return member 45 body of this embodiment does not need to be provided with any exhaust holes, which can not only improve the overall rigidity of the elastic return member 45, but also prevent external dust, dirt or moisture from entering the inner groove 461 and affecting the movement of the elastic return member 45.

[0096] In addition, please refer to Figure 3 and Figure 5 As shown, in this embodiment, the inner groove 461 of the elastic reset member 45 further has a convex portion 462, and the convex portion 462 is connected to the bottom 47 of the elastic reset member 45. When the key cap 41 is not pressed and is located at a height position, the convex portion 462 maintains a distance from the key cap 41. Figure 6 As shown, when the keycap 41 is pressed and moves downward toward the substrate 10, the keycap 41 approaches the protrusion 462 and presses against the protrusion 462, so that the pressing force can be directly transmitted to the bottom 47, so that the bottom 47 with a smaller width can actually press against the pressure sensing element 21, thereby improving the sensitivity of pressure sensing.

[0097] like Figure 3 and Figure 5As shown, the bottom 47 of the elastic reset member 45 has a light guide groove 48, and the position of the light guide groove 48 corresponds to the position of the light emitting member 31. In this embodiment, the light emitting member 31 is located inside the light guide groove 48, so that the light emitting member 31 can be protected by the elastic reset member 45 to prevent external dust, dirt or moisture from contacting the light emitting member 31 and causing damage. In addition, the light of the light emitting member 31 can also be guided by the light guide groove 48 to achieve the required irradiation angle and intensity distribution.

[0098] As above, Figure 3 and Figure 5 As shown, in this embodiment, the cross section of the light guide groove 48 has a curved edge 481 and an opening 485, the opening 485 faces the light emitting member 31, the curved edge 481 includes a first side edge 482, a central curved edge 483 and a second side edge 484, the central curved edge 483 is connected between the first side edge 482 and the second side edge 484, and the curvature of the central curved edge 483 is different from the curvature of the first side edge 482 or the second side edge 484 (here, the curvature of the central curved edge 483 is greater than the curvature of the first side edge 482 and the curvature of the second side edge 484). Therefore, the light emitted by the light emitting member 31 can be refracted to the required position by the change of the curvature of the curved edge 481. For example, the light emitted by the light emitting member 31 can be concentratedly irradiated to the central area of ​​the keycap 41 or the area with characters by the refraction of the curved edge 481, so as to control the light to meet a specific irradiation angle and intensity distribution.

[0099] Figure 8 is an exploded perspective view of another embodiment of the keyboard device of the present invention, Fig. 9 is a cross-sectional view of another embodiment of the keyboard device of the present invention, Fig.10 FIG. 2 is a cross-sectional view of another embodiment of the keyboard device of the present invention. Figure 8 and Fig. 9 As shown, this embodiment is different from the above Figure 3 The difference between the embodiment of the present invention and the embodiment of the present invention is that the width of the bottom 47a of the elastic reset member 45a is greater than the width of the top 46a, that is, the elastic reset member 45a is narrow at the top and wide at the bottom. In addition, the bottom 47a of the elastic reset member 45a has an inner groove 471a and is hollow, so that the elastic reset member 45a can generate elastic deformation and accumulate elastic force (such as when the key cap 41 is compressed) when it is compressed. Fig.10 shown).

[0100] like Figure 8 and Fig. 9As shown, in the present embodiment, the protective layer 20 has at least one first exhaust hole 25 (here the number of the first exhaust holes 25 is three and they are arranged at equal angles), the circuit layer 30 has at least one second exhaust hole 35 (here the number of the second exhaust holes 35 is three and they are arranged at equal angles), and the elastic return member 45a covers each first exhaust hole 25 and each second exhaust hole 35, and makes the internal spaces of each first exhaust hole 25, each second exhaust hole 35 and the inner groove 471a communicate with each other.

[0101] By this, Fig.10 As shown, when the elastic reset member 45a is compressed by the key cap 41, the air in the inner groove 471a can be discharged through the first exhaust hole 25 and the second exhaust hole 35 to make the elastic reset member 45a deform smoothly. Therefore, the elastic reset member 45a body of this embodiment does not need to be provided with any exhaust hole, which can not only improve the rigidity of the elastic reset member 45a as a whole, but also prevent external dust, dirt or moisture from entering the inner groove 471a and affecting the action of the elastic reset member 45a. In addition, since the elastic reset member 45a covers each first exhaust hole 25 and each second exhaust hole 35, external dust, dirt or moisture cannot enter the surface of the protective layer 20 in contact with the circuit layer 30 from each first exhaust hole 25 and each second exhaust hole 35, thereby achieving a waterproof and dustproof effect.

[0102] like Figure 8 and Fig. 9 As shown, in this embodiment, a base 50 is further provided below the circuit layer 30. The base 50 includes a bottom wall 51 and a peripheral wall 52. The peripheral wall 52 protrudes and surrounds the bottom wall 51. The peripheral wall 52 contacts and rests on the circuit layer 30 to support the substrate 10, the protective layer 20 and the circuit layer 30. In addition, a gas channel 53 is formed between the peripheral wall 52 and the bottom wall 51 of the base 50. The gas channel 53 is connected to the first exhaust hole 25 and the second exhaust hole 35. In this way, Fig.10 As shown, when the elastic return member 45a is compressed by the keycap 41, the air in the inner groove 471a can be discharged into the gas channel 53 through the first exhaust hole 25 and the second exhaust hole 35, so that the base 50 can provide support and exhaust functions at the same time.

[0103] like Figure 8 and Fig. 9 As shown, in this embodiment, the base 50 includes at least one supporting rib 54 (here, the number of supporting ribs 54 is three and they are arranged at equal angles), each supporting rib 54 is connected to the bottom wall 51 and is located in the gas channel 53, multiple supporting ribs 54 are in contact with the circuit layer 30, and the positions of the multiple supporting ribs 54 correspond to the bottom 47a of the elastic reset member 45a, so as to achieve the function of supporting the elastic reset member 45a, so that the force of the bottom 47a of the elastic reset member 45a pressing against the pressure sensing member 21 can be averaged to improve the accuracy of sensing. In addition, as Figure 8 and Fig.10 As shown, when the elastic return member 45 a is compressed by the key cap 41 , the air in the inner groove 471 a can also be discharged into the gas channel 53 from the gaps between the plurality of support ribs 54 .

[0104] For example Figure 8 As shown, in the present embodiment, the circumferential wall 52 of the base 50 further has at least one exhaust groove 521, wherein the number of the exhaust grooves 521 is two and they are respectively located on two opposite sides of the base 50, and each exhaust groove 521 is connected to the gas channel 53, so that the air entering the gas channel 53 can be further discharged to the outside through each exhaust groove 521.

[0105] Although the technical contents of the present invention have been disclosed as above in the form of preferred embodiments, they are not intended to limit the present invention. Any slight changes and modifications made by any person skilled in the art without departing from the spirit of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the appended claims.

Claims

1. A keyboard device, characterized in that: include: A substrate having a top surface and a bottom surface, wherein the top surface has an assembly area, the assembly area has a through hole, and the through hole passes through the top surface and the bottom surface; A circuit layer, stacked below the bottom surface, the surface of the circuit layer having a conductive circuit; A pressure sensing element, located between the bottom surface and the circuit layer, the pressure sensing element is connected to the conductive circuit, and the position of the pressure sensing element corresponds to the through hole; as well as A key assembly is arranged above the assembly area, and the key assembly includes a keycap and an elastic return member, wherein the elastic return member is located between the keycap and the substrate, and the elastic return member has a top and a bottom, wherein the top contacts the keycap, and the bottom corresponds to the pressure sensing member. 2 . The keyboard device as claimed in claim 1 , wherein the pressure sensing element is disposed on a surface of the circuit layer.

3. The keyboard device according to claim 1, wherein: The circuit layer has a light emitting member, and the position of the light emitting member corresponds to the through hole.

4. The keyboard device according to claim 1, wherein: It also includes a protection layer, which is stacked on the bottom surface of the substrate, and the circuit layer is stacked below the protection layer.

5. The keyboard device according to claim 4, characterized in that: The protection layer has an upper surface and a lower surface, the upper surface is fixed to the bottom surface of the substrate, and the pressure sensing element is arranged on the lower surface.

6. The keyboard device according to claim 4, characterized in that: The protection layer has a through hole, and the light-emitting element of the circuit layer is located in the through hole.

7. The keyboard device according to claim 1, wherein: The width of the top of the elastic return member is greater than the width of the bottom.

8. The keyboard device according to claim 1, wherein: The top of the elastic return member has an inner groove, and the surface of the key cap contacting the top has an exhaust groove, and the exhaust groove is connected to the inner space of the inner groove.

9. The keyboard device according to claim 1, wherein: The circuit layer has a light-emitting component, the position of the light-emitting component corresponds to the through hole, and the bottom of the elastic reset component has a light-guiding groove, the position of the light-guiding groove corresponds to the light-emitting component.

10. The keyboard device according to claim 9, characterized in that The cross-section of the light guide groove has a curved edge and an opening, the opening faces the light-emitting component, the curved edge includes a first side edge, a central arc edge and a second side edge, the central arc edge is connected between the first side edge and the second side edge, and the curvature of the central arc edge is different from the curvature of the first side edge or the second side edge.

11. The keyboard device according to claim 10, characterized in that: The curvature of the central arc edge is greater than the curvature of the first side edge and the curvature of the second side edge.

12. The keyboard device according to claim 1, wherein: The width of the bottom of the elastic return member is greater than the width of the top, the bottom has an inner groove, the circuit layer has an exhaust hole, and the exhaust hole is connected to the inner space of the inner groove.

13. The keyboard device according to claim 12, wherein: It also includes a base, which is arranged below the circuit layer. The base includes a bottom wall and a circumferential wall. The circumferential wall protrudes and surrounds the bottom wall. A gas channel is formed between the circumferential wall and the bottom wall. The gas channel is connected to the exhaust hole. The circumferential wall contacts the circuit layer.

14. The keyboard device according to claim 13, wherein: The base includes a support rib, the support rib is connected to the bottom wall and is located in the gas channel, the support rib contacts the circuit layer, and the position of the support rib corresponds to the bottom of the elastic reset member.

15. The keyboard device according to claim 13, characterized in that: The circumferential wall has an exhaust groove, and the exhaust groove is connected to the gas channel.

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