TWM535343U - Keyswitch device and keyboard - Google Patents

Abstract

A keyswitch device includes a bottom board, a circuit layer, a light source, a light guide plate, a transmissive layer, and a keyswitch assembly. The circuit layer is disposed over the bottom board and has a contact. The light source is disposed on the circuit layer. The light guide plate is disposed over the circuit layer and has a first through hole and a second through hole. The light source is accommodated in the first through hole. The transmissive layer is disposed over the light guide plate and a third through hole substantially aligned with the second through hole. The keyswitch assembly is disposed on the transmissive layer and includes a restoring member and a conductive member. The conductive member is configured to electrically contact the contact sequentially through the third and second through holes.

Description

Button device and keyboard

The present invention relates to a button device and a keyboard, and more particularly to a button device and a keyboard that can be illuminated.

In terms of the current usage habits of personal computers, the keyboard is one of the indispensable input devices for inputting text or numbers. Moreover, the consumer-grade electronic products that are in contact with everyday life or the large-scale processing equipment used in the industry need to have a button structure as an input device to operate the above-mentioned electronic products and processing equipment.

In order to facilitate the use of the keyboard in a darker place, the market has developed a Light-Emitting Diode (LED) illuminated keyboard, which allows users to use it in places with dark lighting, thus making the keyboard more diverse. Increase in sex. Referring to Taiwan Patent No. I220213, there is a conventional illuminating keyboard which additionally includes a light guide body and a light emitting diode on the keyboard, so that light emitted by the light emitting diode can be incident into the light guide body, and The conduction of the light guide body is uniformly outputted or transmitted to the keycap. Today's computer products are moving in a light, thin, short, and small direction, and the keyboard is no exception. Under this development trend, the aforementioned conventional illuminated keyboard will not conform to the thickness because of the need to add a light guide. need.

Referring also to Taiwan Patent No. M341265, which discloses a light guide using a circuit board and a reflection sheet disposed under the circuit board, and a light source disposed on a side of the circuit board to transmit light emitted from the light source through the circuit board. Conducted to the keycap. Since the conventional illuminating keyboard mostly uses a flexible circuit board to provide the power required for the illuminating diode, however, for the sake of cost consideration, the conventional illuminating keyboard tends to concentrate only the illuminating diode on a small area of the illuminating keyboard. In order to avoid the use of a large-area flexible circuit board, which will result in a stronger light intensity obtained by a button closer to the light-emitting diode, and the light intensity obtained by the button farther from the light-emitting diode is weaker. Therefore, it is necessary to provide some light diffusion structures on the light guide body in a complicated manner to compensate for the difference in light intensity, and the effect thereof is extremely limited, and the design difficulty is increased. Furthermore, the light source is independently disposed outside the circuit board, and it is difficult to meet the requirements of waterproof and dustproof, which may affect the reliability of the product. Moreover, the circuit layout of the circuit board is mostly laid on the substrate by using silver paste material. However, since the material of the substrate is likely to be corroded when the silver paste is disposed, the layout of the circuit may affect the efficiency of light emission, and the luminous efficiency of the product is affected. .

Referring also to Taiwan Patent No. I490731, which discloses that a light-emitting diode is separately disposed under each button (or a required button) in the keyboard, and the light-emitting diode is directly disposed on the thin film circuit board as a silver paste line. And towards the keycap of the button to illuminate. However, this method requires a large number of light-emitting diodes, which not only increases the cost, but also consumes more power. In addition, due to the large impedance of the silver paste line, the impedance of each line may be different, which may result in uneven brightness of the light-emitting diode, so that the light-emitting effect of the key cap is greatly reduced. Not only that, but the above method will also limit the light-emitting area of the keycap to a small area, and therefore Affect the user's visual experience.

Therefore, how to propose a button device that can solve the above problems is one of the problems that the industry is eager to invest in research and development resources.

In view of this, one of the aims of the present invention is to propose a key device and a keyboard which can effectively reduce the overall thickness.

In order to achieve the above object, according to one embodiment of the present invention, a button device includes a bottom plate, a circuit layer, a light source, a light guide plate, a transmission layer, and a button assembly. The circuit layer is disposed above the bottom plate and has a switch contact. The light source is disposed on the circuit layer. The light guide plate is disposed above the circuit layer and has a first through hole and a second through hole. The light source is housed in the first perforation. The transmissive layer is disposed above the light guide plate and has a third perforation. The third aperture is substantially aligned with the second aperture. The button assembly is disposed on the transmissive layer and includes a reset member and a conductive member. The conductive member is configured to sequentially contact the switch contact through the third through hole and the second through hole.

In one or more embodiments of the present invention, the transmissive layer comprises a transparent substrate. The transparent substrate is provided with a reflective coating and a masking coating and forms a transmissive region. The orthographic projection of the button assembly on the transmissive layer encompasses the transmissive region. The orthographic projection of the first perforation on the transmissive layer overlaps the reflective coating.

In one or more embodiments of the present invention, the transparent substrate described above has a top surface. The top surface faces the button assembly. The reflective coating is placed on the top surface. The masking coating covers the reflective coating.

In one or more embodiments of the present invention, the transparent substrate has a top surface and a bottom surface. The top surface faces the button assembly. The bottom surface guides the light panel. The masking coating is disposed on the top surface. The reflective coating is placed on the bottom surface.

In one or more embodiments of the present invention, the orthographic projection of the first perforation of the light guide plate on the transmissive layer overlaps with the reflective coating.

In one or more embodiments of the present invention, the conductive member is disposed on a side of the reset member facing the transmissive layer.

In one or more embodiments of the present invention, the reset member is a rubber elastic body. The conductive member is a conductive rubber member.

In one or more embodiments of the present invention, the button device further includes an annular adhesive layer. The annular adhesive layer is configured to bond the reset member and the transmission layer. The third perforation is located within the range of the annular adhesive layer.

In one or more embodiments of the present invention, the light guide plate has a plurality of light diffusion structures. The light diffusing structure is located on a surface of the light guide plate facing the bottom plate and corresponds to the button assembly.

In one or more embodiments of the present invention, the circuit layer described above further includes a power supply circuit. The light source is powered by a power supply circuit.

In order to achieve the above object, according to another embodiment of the present invention, a keyboard includes a bottom plate, a circuit layer, a plurality of light sources, a light guide plate, a transmission layer, and a plurality of button assemblies. The circuit layer is disposed on the bottom plate and has a plurality of switch contacts. The light source is disposed on the circuit layer. The light guide plate is disposed on a side of the circuit layer away from the bottom plate, and has a plurality of first through holes and a plurality of second through holes. The light sources are respectively accommodated in the first perforations. The transmissive layer is disposed on a side of the light guide plate away from the circuit layer, and has a plurality of third perforations. The third aperture is substantially aligned with the second aperture, respectively. The button assembly is disposed on the transmission layer. Each button assembly includes a reset member and a conductive member. The conductive member is configured to sequentially pass through the corresponding third through hole and the corresponding second The perforated and electrically contacted corresponding switch contacts.

In one or more embodiments of the present invention, the transmissive layer comprises a transparent substrate. The transparent substrate is provided with a reflective coating and a masking coating and forms a plurality of transmissive regions. The orthographic projection of the button assembly on the transmissive layer encompasses the transmissive region, respectively. The orthographic projection of the first perforation on the transmissive layer overlaps the reflective coating.

In one or more embodiments of the present invention, the keyboard further includes a plurality of annular adhesive layers. Each annular adhesive layer is configured to bond the corresponding reset member and the transmission layer. Each third perforation is located within the range of the corresponding annular adhesive layer.

In summary, the button device and the keyboard of the present invention are arranged in a space between the circuit layer and the transmission layer, and provide a light guiding function by using a light guide plate disposed between the circuit layer and the transmission layer, and at the same time The thickness of the light plate separates the switch circuit from the conductive member, and simultaneously uses the function of the transmission layer and the circuit layer to reach the light shielding layer and the reflective layer, thereby integrating the switching function and the backlight function of the keyboard into a single module, thereby effectively reducing the button device and The overall thickness of the keyboard can reduce manufacturing costs and assembly processes. Moreover, compared to the conventional illuminated keyboard in which a backlight module is additionally provided outside the thin film circuit board (for example, under the bottom plate), since the light source of the keyboard of the present invention is built between the circuit layer and the transmission layer. The components, and thus their placement, do not affect the manufacturing cost, and can be evenly disposed on the circuit layer, so that each button device can obtain light with uniform and uniform light intensity. Furthermore, the button device and the keyboard of the present invention also provide switch contacts on the circuit layer, and respectively provide perforations on the light guide plate and the transmissive layer, and are arranged on the reset member of the button assembly to be connected to the switch through the through holes. A conductive member that is electrically contacted. It should be noted that the conventional light-emitting key for the conductive member and the switch contact are respectively disposed on the upper and lower films. In the case of a disk, if the distance between the two films is too large, the difficulty in contact between the conductive member and the switch contact is increased, which also results in a limited thickness of the light guide plate. In contrast, since the reset member is originally a movable member, the conductive member disposed on the reset member can be easily electrically contacted with the switch contact on the circuit layer as the reset member moves, and is not limited to the guide. The thickness of the light board. Thereby, the button device and the keyboard of the present invention can adopt a light guide plate having a thickness of a light guiding effect as needed.

The above description is only used to explain the problems to be solved by the present invention, the technical means for solving the problems, the effects thereof, and the like, and the specific details of the present invention will be described in detail in the following embodiments and related drawings.

100‧‧‧ keyboard

110‧‧‧floor

111‧‧‧ hook

121‧‧‧Line layer

121a‧‧‧Switch contacts

122‧‧‧Transmission layer

122a‧‧‧Transparent substrate

122a1‧‧‧ top surface

122a2‧‧‧ bottom

122b‧‧‧Reflective coating

122c‧‧‧mask coating

122c1‧‧‧Transmission zone

122d‧‧‧ third perforation

123‧‧‧Light guide plate

123a‧‧‧First perforation

123b‧‧‧second perforation

123c‧‧‧Light diffusion structure

124‧‧‧Power supply circuit

130‧‧‧Light source

140‧‧‧Key components

141‧‧‧Connecting parts

142‧‧‧Key Cap

143‧‧‧Reset parts

150‧‧‧Electrical parts

160‧‧‧ annular adhesive layer

The above and other objects, features, advantages and embodiments of the present invention can be more clearly understood. The description of the drawings is as follows: FIG. 1 is a perspective view showing a keyboard of an embodiment of the present invention.

Fig. 2 is a partial exploded view showing the key device of Fig. 1.

Figure 3 is a cross-sectional view showing the button device of Figure 1 along line 3-3.

Fig. 4 is a partial cross-sectional view showing the key device of Fig. 3 in an embodiment.

Fig. 5 is a partial cross-sectional view showing the key device of Fig. 3 in another embodiment.

Figure 6 is a partial cross-sectional view showing the key device of Figure 3 in another embodiment.

In the following, a plurality of embodiments of the present invention will be disclosed in the drawings. For the sake of clarity, a number of practical details will be described in the following description. However, it should be understood that these practical details are not applied to limit the creation. That is to say, in the implementation part of this creation, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

Please refer to Figure 1. FIG. 1 is a perspective view showing a keyboard 100 according to an embodiment of the present invention. As shown in FIG. 1, the keyboard 100 of the present embodiment may be a computer system (for example, a keyboard of a PS2 interface or a keyboard of a USB interface) for a desktop computer or a computer system including an input device in the form of a keyboard (for example, Notebook or laptop), but not limited to this. In other words, the concept of the keyboard 100 of the present invention can be applied to any electronic product that uses a button device as an input interface.

Please refer to Figure 2 and Figure 3. Fig. 2 is a partial exploded view showing the key device of Fig. 1. Figure 3 is a cross-sectional view showing the button device of Figure 1 along line 3-3. As shown in FIGS. 1 to 3, in the present embodiment, the keyboard 100 includes a bottom plate 110, a circuit layer 121, a light guide plate 123, a transmission layer 122, and a plurality of light sources 130 (only in FIGS. 2 and 3). A plurality of button assemblies 140 are illustrated, wherein the combination of the bottom plate 110, the circuit layer 121, the light guide plate 123, the transmission layer 122, the single light source 130, and the single button assembly 140 can be regarded as independent button devices, but the creation Without being limited thereto, the plurality of button assemblies 140 may share a light source 130 when actually applied. The circuit layer 121 is disposed above the bottom plate 110. The light source 130 is disposed on the circuit layer 121. The light guide plate 123 is disposed above the circuit layer 121. The transmission layer 122 is disposed above the light guide plate 123. Button assembly 140 is disposed above the transmissive layer 122.

Specifically, the bottom plate 110 is provided with a hook 111. The circuit layer 121 and the light guide plate 123 have a through hole (not labeled) corresponding to the transmission layer 122 for the hook 111 of the bottom plate 110 to pass through. The button assembly 140 includes a connector 141, a keycap 142, and a reset member 143. In this embodiment, the connecting member 141 is connected between the key cap 142 and the hook 111 of the bottom plate 110, and is pivotally connected by the two connecting rods, so as to drive the key cap 142 to move up and down with respect to the bottom plate 110. The reset member 143 is disposed above the transmissive layer 122 and between the key cap 142 and the transmissive layer 122. When the keycap 142 is pressed down by receiving an external force, the reset member 143 will generate a resistance to the keycap 142, thereby providing a user's feeling of pressing, and when the external force applied to the keycap 142 is released, the reset member 143 can be provided. The pressure key cap 142 is restored to the original uncompressed position. In this embodiment, the reset member 143 can be a rubber elastic body. The present invention is not limited thereto, and the metal round can also be used in actual application. Top, spring, shrapnel or other suitable component.

In practical applications, the connecting member 141 can also be replaced with other supporting structures having similar functions (ie, driving the keycap 142 to move up and down relative to the bottom plate 110), such as a V-shaped, A-shaped or two-parallel connecting rod structure.

Please refer to FIG. 4, which is a partial cross-sectional view showing the button device in FIG. 3 in an embodiment. As shown in FIGS. 2 to 4, in the present embodiment, the light guide plate 123 has a plurality of first through holes 123a (only one of which is shown in FIGS. 2 to 4). The light source 130 is disposed on the circuit layer 121 and located in the first through hole 123a of the light guide plate 123, and the transmission layer 122 covers the light source 130, thereby allowing the space where the light source 130 is located to have a waterproof and dustproof effect.

In addition, as shown in FIG. 3, the light guide plate 123 has a plurality of plural numbers The second perforations 123b (only one of which is shown in Figures 2 and 3). The second through holes 123b are located directly below the button assembly 140.

Further, please refer to FIG. 5, which is a partial cross-sectional view showing the key device of FIG. 3 in another embodiment. As shown in FIG. 5, the wiring layer 121 includes switch contacts 121a. The button assembly 140 further includes a plurality of conductive members 150 (only one of which is shown in FIGS. 2 to 4). The conductive member 150 is disposed on a side of the corresponding reset member 143 facing the transmissive layer 122. The conductive member 150 is disposed to sequentially pass through the third through hole 122d of the transmitting layer 122 and the second through hole 123b of the light guiding plate 123 to contact the switch contact 121a on the circuit layer 121. In this embodiment, the conductive member 150 is disposed on the conductive member 150. The conductive rubber member at the bottom of the reset member 143.

Specifically, when the key cap 142 is not pressed, the conductive member 150 on the reset member 143 and the switch contact 121a on the circuit layer 121 are electrically separated from each other on both sides of the light guide plate 123. When the keycap 142 is pressed to move toward the bottom plate 110, the key cap 142 pushes the reset member 143 toward the bottom plate 110, so that the conductive member 150 partially passes through the third through hole 122d of the transmission layer 122 to partially enter the light guide plate 123. The second via 123b, in turn, contacts the switch contact 121a on the circuit layer 121 (i.e., the triggering action, in the present embodiment, is caused by the reset member 143 to move the conductive member 150 to trigger the switch contact 121a). Thereby, the switch contact 121a then generates a trigger signal corresponding to the pressed button device. In some embodiments, the switch contacts 121a are finger electrodes.

As shown in FIGS. 2 and 5, in the present embodiment, the button device further includes an annular adhesive layer 160. The annular adhesive layer 160 is configured to bond the reset member 143 and the transmissive layer 122, and the third through hole 122d is located within the range of the annular adhesive layer 160. Thereby, it is possible to effectively prevent dust and/or water droplets from passing through the third The hole 122d enters the space between the circuit layer 121 and the transmission layer 122, so that the space in which the switch contact 121a is located has a waterproof and dustproof effect.

As shown in FIGS. 4 and 5, in the present embodiment, the transmission layer 122 includes a transparent substrate 122a. The transparent substrate 122a is provided with a reflective coating 122b and a masking coating 122c. The transparent substrate 122a has a top surface 122a1 and a bottom surface 122a2. The top surface 122a1 of the transparent substrate 122a faces the button assembly 140. The bottom surface 122a2 of the transparent substrate 122a faces the light guide plate 123. The reflective coating 122b is disposed on the top surface 122a1 of the transparent substrate 122a. Preferably, the reflective coating 122b and the shielding coating 122c correspond to each other, and are formed where the reflective coating 122b and the shielding coating 122c are not coated. Transmissive region 122c1 (refer to Fig. 4 for cooperation). The orthographic projection of button assembly 140 on transmissive layer 122 corresponds (e.g., encompasses) transmissive region 122c1. The circuit layer 121 also includes a power supply circuit 124. The light source 130 is powered by the power supply circuit 124.

In the present embodiment, the circuit layer 121 is a substrate made of a non-transparent material having a reflective effect, or may be formed by printing a reflective ink with a transparent substrate, thereby providing the circuit layer 121 with a reflective effect for improving Luminous efficiency. The light source 130 is a top-emitting LED, and the orthographic projection of the first via 123a of the light guide plate 123 on the transmissive layer 122 overlaps with the reflective coating 122b, so that the light emitted by the light source 130 toward the transmissive layer 122 is reflected. The coating 122b reflects and enters the light guide plate 123 for conduction. By the reflective function of the reflective layer 122b of the circuit layer 121 and the transmissive layer 122, it can be ensured that all the light emitted by the light source 130 can be completely transmitted into the light guide plate 123, and can be used for reflecting and shielding the light around the light source 130, avoiding the light source. The brightness of the surrounding area of 130 is too high, thereby improving the uniformity of light. When the conducted light reaches the uncoated masking coating 122c When the transmissive region 122c1 formed at the reflective coating 122b (as shown in FIG. 5) passes through the transmissive region 122c1 and reaches the button assembly 140, the effect of causing the button assembly 140 to emit light is achieved. In practical applications, in order to respond to actual needs, the number of transmissive regions 122c1 corresponding to each button assembly 140 can be flexibly increased or decreased, and the shape of the transmissive region 122c1 can be flexibly adjusted.

In the present embodiment, the light guide plate 123 has a light diffusion structure 123c. The light diffusing structure 123c can be disposed on the top surface or the bottom surface of the light guide plate 123. In the present embodiment, the light diffusing structure 123c is disposed on the bottom surface of the light guide plate 123. In some embodiments, the light diffusing structure 123c can form a reflective ink or be a recessed structure. By controlling the shape, size and arrangement of the light diffusing structure 123c, the light intensity transmitted through the light guide plate 123 throughout the light guide plate 123 can be made uniform and uniform.

Therefore, the light source 130 of the keyboard 100 of the present embodiment is a component built in between the circuit layer 121 and the transmissive layer 122, compared to the conventional illuminated keyboard in which a backlight module is additionally provided in addition to the thin film circuit board. Since the installation does not require an additional flexible circuit board, it does not affect the manufacturing cost, and can be uniformly disposed in the space between the circuit layer 121 and the transmission layer 122 according to design requirements, so that each button device can obtain light intensity. Uniform and consistent light. Moreover, since the circuit layer 121 and the light source 130 thereon can be directly fabricated as a single module, the cost of the raw materials and the assembly steps can be saved because the assembled components are reduced compared to the conventional illuminated keyboard.

Please refer to FIG. 6 , which is a partial cross-sectional view showing the button device in FIG. 3 in another embodiment. As shown in Fig. 6, in the present embodiment, the transmission layer 122 also includes a transparent substrate 122a. The transparent substrate 122a is provided with a reflective coating 122b and a masking coating 122c. The embodiment and the embodiment shown in FIG. The difference between the formulas is that the masking coating layer 122c of the present embodiment is disposed on the top surface 122a1 of the transparent substrate 122a, and the reflective coating layer 122b is disposed on the bottom surface 122a2 of the transparent substrate 122a.

Under this structural configuration, the light emitted by the light source 130 toward the transmissive layer 122 is immediately reflected by the reflective coating 122b and enters the light guide plate 123 for conduction, and by the reflective coating 122b of the wiring layer 121 and the transmissive layer 122. The reflection function ensures that all light emitted by the light source 130 can be completely conducted into the light guide plate 123. When the transmitted light reaches the transmissive area 122c1 (refer to FIG. 5), it will pass through the transmissive area 122c1 and reach the button assembly 140, and the effect of causing the button assembly 140 to emit light can also be achieved. That is, the reflective coating 122b and the shielding coating 122c shown in FIG. 4 are both located on the upper surface of the transmission layer 122, and the reflective coating 122b and the shielding coating 122c shown in FIG. 6 are respectively located on the transmission layer 122. Lower surface and upper surface.

In some embodiments, the bottom plate 110 may be made of a hard material (for example, metal or plastic), but the present invention is not limited thereto.

From the above detailed description of the specific implementation of the present invention, it can be clearly seen that the key device and the keyboard of the present invention are a space in which a light source is disposed between the circuit layer and the transmission layer, and is disposed on the circuit layer and the transmission layer. The light guide plate provides the function of guiding light, and the switch circuit and the conductive member are separated by the thickness of the light guide plate, and the function of the light shielding layer and the reflective layer is realized by using the transmission layer and the circuit layer, thereby switching the switching function and the backlight function of the keyboard. Integration into a single module can effectively reduce the overall thickness of the button device and keyboard, and reduce manufacturing costs and assembly processes. Moreover, compared to the conventional illuminated keyboard that additionally adds a backlight module outside the thin film circuit board (for example, under the bottom plate), due to the light of the keyboard of the present creation The source is an element built in between the circuit layer and the transmission layer, so that the installation position does not affect the manufacturing cost, and can be uniformly disposed on the circuit layer, so that each button device can obtain light with uniform and uniform light intensity. Furthermore, the button device and the keyboard of the present invention also provide switch contacts on the circuit layer, and respectively provide perforations on the light guide plate and the transmissive layer, and are arranged on the reset member of the button assembly to be connected to the switch through the through holes. A conductive member that is electrically contacted. It should be noted that for a conventional illuminated keyboard in which the conductive member and the switch contact are respectively disposed on the upper and lower films, if the distance between the two films is too large, the difficulty of contact between the conductive member and the switch contact will be increased. This also results in a limited thickness of the light guide plate. In contrast, since the reset member is originally a movable member, the conductive member disposed on the reset member can be easily electrically contacted with the switch contact on the circuit layer as the reset member moves, and is not limited to the guide. The thickness of the light board. Thereby, the button device and the keyboard of the present invention can adopt a light guide plate having a thickness of a light guiding effect as needed.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present creation. The scope is subject to the definition of the scope of the patent application.

100‧‧‧ keyboard

110‧‧‧floor

111‧‧‧ hook

121‧‧‧Line layer

122‧‧‧Transmission layer

122d‧‧‧ third perforation

123‧‧‧Light guide plate

123a‧‧‧First perforation

123b‧‧‧second perforation

130‧‧‧Light source

140‧‧‧Key components

141‧‧‧Connecting parts

142‧‧‧Key Cap

143‧‧‧Reset parts

150‧‧‧Electrical parts

160‧‧‧ annular adhesive layer

Claims (20)

A light button device comprises: a bottom plate; a circuit layer disposed above the bottom plate and having a switch contact; a light source disposed on the circuit layer; a light guide plate disposed above the circuit layer and having a a first through hole and a second through hole, wherein the light source is received in the first through hole; a transmissive layer is disposed above the light guide plate and has a third through hole, wherein the third through hole is substantially aligned with the second through hole And a button assembly disposed on the transmissive layer and including a reset member and a conductive member, the conductive member configured to sequentially contact the switch contact through the third through hole and the second through hole . The key device of claim 1, wherein the transmissive layer comprises: a transparent substrate, the transparent substrate is provided with a reflective coating and a masking coating, and forms a transmissive region, wherein the button assembly is An orthographic projection on the transmissive layer covers the transmissive region, and an orthographic projection of the first perforation on the transmissive layer overlaps the reflective coating. The button device of claim 2, wherein the transparent substrate has a top surface facing the button assembly, the reflective coating is disposed on the top surface, and the masking coating covers the reflective coating. The key device of claim 2, wherein the transparent substrate has a top surface facing the button assembly, the bottom surface facing the light guide plate, and the shielding coating is disposed on the top surface. The reflective coating is disposed on the bottom surface. The key device of claim 2, wherein an orthographic projection of the first perforation of the light guide plate on the transmissive layer overlaps the reflective coating. The button device of claim 1, wherein the conductive member is disposed on a side of the reset member facing the transmissive layer. The button device of claim 6, wherein the reset member is a rubber elastic body, and the conductive member is a conductive rubber member. The button device of claim 1, further comprising an annular adhesive layer configured to bond the reset member and the transmissive layer, and the third perforation is located in the range of the annular adhesive layer Inside. The button device of claim 1, wherein the light guide plate has a light diffusing structure, and the light diffusing structure is located on a surface of the light guide plate facing the bottom plate, and corresponds to the button assembly. The button device of claim 1, wherein the line The road layer further includes a power supply circuit, and the light source is powered by the power supply circuit. A keyboard comprising: a bottom plate; a circuit layer disposed above the bottom plate and having a plurality of switch contacts; a plurality of light sources disposed on the circuit layer; a light guide plate disposed above the circuit layer and having a plurality of first perforations and a plurality of second perforations, wherein the light sources are respectively received in the first perforations; a transmissive layer is disposed above the light guide plate and has a plurality of third perforations, wherein the plurality of perforations The three perforations are substantially aligned with the second perforations; and a plurality of button assemblies are disposed on the transmissive layer, each of the button assemblies includes a reset member and a conductive member, the conductive members are configured to sequentially pass through the corresponding The third through hole and the corresponding second through hole electrically contact the corresponding switch contact. The keyboard of claim 11, wherein the transmissive layer comprises: a transparent substrate, the transparent substrate is provided with a reflective coating and a masking coating, and a plurality of transmissive regions are formed, wherein the button components are The orthographic projections on the transmissive layer respectively cover the transmissive regions, and the orthographic projections of the first perforations on the transmissive layer overlap the reflective coating. The keyboard of claim 12, wherein the transparent The substrate has a top surface facing the button assembly, the reflective coating being disposed on the top surface, the masking coating covering the reflective coating. The keyboard of claim 12, wherein the transparent substrate has a top surface facing the button assembly, the bottom surface facing the light guide plate, and the shielding coating is disposed on the top surface, A reflective coating is disposed on the bottom surface. The keyboard of claim 12, wherein an orthographic projection of the first perforations of the light guide plate on the transmissive layer overlaps the reflective coating. The keyboard of claim 12, wherein the conductive member is disposed on a side of the reset member facing the transmissive layer. The keyboard of claim 16, wherein each of the reset members is a rubber elastic body, and each of the conductive members is a conductive rubber member. The keyboard of claim 11, further comprising a plurality of annular adhesive layers, each of the annular adhesive layers being configured to bond the corresponding reset member and the transmissive layer, and each of the third perforations is located Corresponding to the extent of the annular adhesive layer. The keyboard of claim 11, wherein the light guide plate has a light diffusing structure, and the light diffusing structure is located on a surface of the light guide plate facing the bottom plate. The keyboard of claim 11, wherein the circuit layer further comprises a power supply circuit, and the light sources are powered by the power supply circuit.