TWM535393U - Keyswitch device and keyboard - Google Patents

Abstract

A keyswitch device includes a bottom plate, a membrane circuit board, a keyswitch assembly, and a backlight module. The membrane circuit board is disposed on the bottom plate. The keyswitch assembly is disposed on the membrane circuit board. The backlight module is disposed at a side of the bottom plate away from the membrane circuit board and includes a light-shielding piece. The light-shielding piece includes a transparent substrate and an anti-ESD/EMI shielding layer. The anti-ESD/EMI shielding layer is disposed on the transparent substrate and contacts the bottom plate.

Description

Button device and keyboard

This creation is about a button device and a keyboard.

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 increase the application of the keyboard (for example, in order to conveniently use the keyboard in a darker place, or for the keyboard to have a bright display, easy to distinguish, etc.), the market has developed a backlit keyboard, so that users can also Use in places with dark lighting. At present, it is known to set a backlight module in the keyboard to project the light emitted by the light source to the periphery of each button of the keyboard through the backlight module, so that the light passes through the gap between the plurality of buttons or the key cap of the button. The light part leaked out.

However, it is customary that a keyboard using a backlight module often performs backlighting during Electrostatic Discharge (ESD) testing and Electromagnetic Interference (EMI) testing. The internal components of the module are damaged. In the case of a backlight module using a light-emitting diode as a light source, the aforementioned test may cause damage to the wiring of some light-emitting diodes, which will cause a significant decrease in the yield of the keyboard.

Therefore, how to propose a button device and a keyboard 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 purposes of the present invention is to propose a button device that can effectively avoid damage of the backlight module used in performing Electrostatic Discharge (ESD) testing and Electromagnetic Interference (EMI) testing. And the keyboard.

In order to achieve the above object, according to one embodiment of the present invention, a button device includes a bottom plate, a thin film circuit board, a button assembly, and a backlight module. The thin film circuit board is disposed on the bottom plate. The button assembly is disposed on the thin film circuit board. The backlight module is disposed on a side of the bottom plate away from the thin film circuit board and includes a light shielding film. The visor comprises a transparent substrate and an anti-ESD/EMI masking coating. The anti-ESD/EMI masking coating is disposed on the transparent substrate and in contact with the substrate.

In one or more embodiments of the present disclosure, the anti-ESD/EMI masking coating described above comprises carbon powder.

In one or more embodiments of the present invention, the anti-ESD/EMI masking coating is a colloid layer mixed with carbon powder.

In one or more embodiments of the present invention, the anti-ESD/EMI masking coating is an ink layer mixed with carbon powder.

In one or more embodiments of the present creation, the above-mentioned light shielding film A reflective coating is also included. The reflective coating is placed on the side of the transparent substrate that is away from the ESD/EMI shielding coating.

In one or more embodiments of the present invention, the orthographic projection of the reflective coating described above on the ESD/EMI shielding coating is encompassed within the outer edge of the ESD/EMI shielding coating.

In one or more embodiments of the present invention, the light shielding sheet further includes an ink coating. The ink coating is disposed between the transparent substrate and the reflective coating.

In one or more embodiments of the present invention, the orthographic projection of the reflective coating described above on the ink coating is encompassed within the outer edge of the ink coating.

In one or more embodiments of the present invention, the backlight module further includes a reflective sheet, a light guiding spacer, and a light source. The reflection sheet is located on a side of the visor away from the bottom plate. The light guiding spacer layer has an accommodating space. The reflective sheet and the light shielding sheet are separated from opposite sides of the light guiding spacer layer. The light source is at least partially accommodated in the accommodating space.

In one or more embodiments of the present invention, the light shielding sheet and the light guiding spacer layer are adhered via an adhesive layer.

In order to achieve the above object, according to another embodiment of the present invention, a keyboard includes a bottom plate, a thin film circuit board, a plurality of key assemblies, and a backlight module. The thin film circuit board is disposed on the bottom plate. The button assembly is disposed on the thin film circuit board. The backlight module is disposed on a side of the bottom plate away from the thin film circuit board and includes a light shielding film. The visor comprises a transparent substrate and an anti-ESD/EMI masking coating. The anti-ESD/EMI masking coating is disposed on the transparent substrate and in contact with the substrate.

In one or more embodiments of the present invention, the reflective coating is substantially grid-like. The reflective coating extends over the button set when the keyboard is overlooked The gap between the pieces.

In one or more embodiments of the present invention, the anti-ESD/EMI masking coating described above is substantially grid-like. The anti-ESD/EMI masking coating extends over the gap between the button assemblies when the keyboard is overlooked.

In summary, the button device and the keyboard are provided with an anti-ESD/EMI shielding coating containing carbon powder on the light shielding sheet of the backlight module, and the anti-ESD/EMI shielding coating is used to contact the bottom plate. Therefore, the anti-ESD/EMI shielding coating can not only prevent the light generated by the backlight module from leaking out through the gap between the button components, but also perform electrostatic discharge test and electromagnetic interference test on the key device and keyboard of the present invention. Effectively avoid damage to the backlight module.

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, 300‧‧‧ keyboard

110‧‧‧floor

111‧‧‧Breaking

112‧‧‧ card hook

120‧‧‧Film board

130‧‧‧Backlight module

131, 231‧‧ ‧ shading film

131a, 231a‧‧‧ Transparent substrate

131b, 231b‧‧‧Anti-ESD/EMI shielding coating

131c, 231c‧‧‧reflective coating

132‧‧‧reflector

133‧‧‧Light guide spacer

134‧‧‧Light source

140‧‧‧Key components

141‧‧‧Connecting parts

142‧‧‧Key Cap

143‧‧‧Reset parts

150‧‧‧ adhesive layer

360‧‧‧ cover

231d‧‧‧Ink coating

2-2‧‧‧ segments

S‧‧‧ accommodating space

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.

Figure 2 is a cross-sectional view of the keyboard of Figure 1 taken along line 2-2.

FIG. 3 is an exploded view showing a backlight module according to an embodiment of the present invention.

FIG. 4 is a schematic exploded cross-sectional view showing a portion of a bottom plate, a light shielding film, and a light guiding spacer layer according to an embodiment of the present invention.

Fig. 5 is a partial plan view showing a light shielding sheet according to an embodiment of the present invention.

Figure 6 is a partial bottom panel, a light shielding film and another embodiment of the present invention. A schematic exploded view of the light guiding spacer layer.

FIG. 7 is a schematic cross-sectional view showing a part of components of a keyboard of another embodiment of the present invention.

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. Figure 2 is a cross-sectional view of the keyboard 100 of Figure 1 taken along line 2-2. FIG. 3 is an exploded view of the backlight module 130 according to an embodiment of the present invention. As shown in FIG. 1 to FIG. 3 , in the present embodiment, the keyboard 100 includes a bottom plate 110 , a thin film circuit board 120 , a backlight module 130 , and a plurality of button assemblies 140 , wherein the bottom plate 110 , the thin film circuit board 120 , and the backlight module The combination of group 130 and single button assembly 140 can be considered as a separate button assembly Set. The thin film circuit board 120 is disposed on the bottom plate 110. The button assembly 140 is disposed on the thin film circuit board 120. The backlight module 130 is disposed on a side of the bottom plate 110 away from the thin film circuit board 120.

Specifically, the bottom plate 110 extends with a plurality of hooks 112. The thin film circuit board 120 correspondingly has a through hole (not shown) for the hook 112 of the bottom plate 110 to pass through. The bottom plate 110 also has a plurality of holes 111 adjacent to the hooks 112. In practical applications, the hook 112 can be formed on the bottom plate 110 by using a stamping process, and the hole 111 is a hole punched out by the stamping process. In other words, the hole 111 generated when the bottom plate 110 forms the hook 112 connectable to the connecting member 141 can be used as an optical path, but the present invention is not limited thereto.

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.

The button assembly 140 includes a connector 141, a keycap 142, and a reset member 143. In the present embodiment, the connecting member 141 is connected between the key cap 142 and the hook 112 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 thin film circuit board 120 and between the key cap 142 and the thin film circuit board 120. 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 pressing key cap 142 returns to the restoring force of the original unpressed position. In the embodiment, the reset member 143 can be an elastic body.

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. The reset member 143 can also be replaced Switch to other components with similar functions, such as magnetic components.

It should be noted that the thin film circuit board 120 is configured to be pressed by the button assembly 140 to generate a trigger signal corresponding to the button assembly 140. Specifically, when the keycap 142 is not pressed, the switching circuit (not shown) in the thin film circuit board 120 is not electrically turned on. When the keycap 142 is pressed and moved toward the bottom plate 110, the keycap 142 directly or indirectly presses the thin film circuit board 120, so that the switching circuit in the thin film circuit board 120 is electrically turned on (ie, the triggering behavior, in this embodiment) The film circuit board 120 is pushed through the reset member 143 to trigger the switching circuit).

Referring to FIG. 4, an exploded cross-sectional view of a portion of the bottom plate 110, the light shielding sheet 131, and the light guiding spacer layer 133 of the embodiment of the present invention is shown. As shown in FIGS. 2 to 4, in the present embodiment, the backlight module 130 includes a laminated light-shielding sheet 131, a reflection sheet 132, a light-guiding spacer layer 133, and a plurality of light sources 134 (see FIG. 3). . The light shielding sheet 131 is disposed on a side of the bottom plate 110 away from the thin film circuit board 120 and is in contact with the bottom plate 110. The reflection sheet 132 is located on a side of the light shielding sheet 131 away from the bottom plate 110. The light guiding spacer layer 133 has a plurality of housing spaces S (see FIG. 3). The light shielding sheet 131 and the reflection sheet 132 are separated from opposite sides of the light guiding spacer layer 133. That is, the light guiding spacer layer 133 separates the reflection sheet 132 from the light shielding sheet 131 by the thickness thereof. The light source 134 is at least partially accommodated in the accommodating space S.

Specifically, the light shielding sheet 131 includes a transparent substrate 131a and an anti-ESD/EMI shielding coating layer 131b. The anti-ESD/EMI shielding coating 131b is disposed on the transparent substrate 131a and is in contact with the bottom plate 110. Thereby, the anti-ESD/EMI shielding coating 131b can perform Electrostatic Discharge (ESD) test and electromagnetic interference in the keyboard 100 of the present embodiment. During the (Electromagnetic Interference, EMI) test, the backlight module 130 (especially the line of the light source 134) is effectively prevented from being damaged.

Please refer to FIG. 5 , which is a partial plan view showing a light shielding sheet according to an embodiment of the present invention. As shown in Fig. 5, in the present embodiment, the anti-ESD/EMI shielding coating 131b layer is substantially in the form of a grid. The anti-ESD/EMI shielding coating 131b extends at the gap between the button assemblies 140 when the keyboard 100 is viewed from above. Therefore, the portion of the transparent substrate 131a where the anti-ESD/EMI shielding coating 131b is not applied (i.e., the region within the mesh) corresponds to the position where each button assembly 140 is disposed. In some embodiments, the anti-ESD/EMI masking coating 131b comprises carbon powder. The anti-ESD/EMI masking coating 131b containing carbon powder is also referred to as carbon black. In some embodiments, the anti-ESD/EMI masking coating 131b fills at least the gap between the button assemblies 140 when the keyboard 100 is viewed from above. Thereby, the anti-ESD/EMI shielding coating 131b can achieve the purpose of preventing the light generated by the light source 134 of the backlight module 130 from leaking out through the gap between the button assemblies 140.

In some embodiments, the anti-ESD/EMI masking coating 131b is a colloidal layer mixed with carbon powder, but the present invention is not limited thereto. In some other embodiments, the anti-ESD/EMI masking coating 131b may also be an ink layer mixed with carbon powder.

As shown in FIG. 4, in the present embodiment, the light shielding sheet 131 further includes a reflective coating layer 131c. The reflective coating 131c is disposed on a side of the transparent substrate 131a away from the anti-ESD/EMI shielding coating 131b. The reflective coating layer 131c of the light shielding sheet 131 and the light guiding spacer layer 133 are adhered via the adhesive layer 150. Thereby, the light emitted by the light source 134 enters the light guiding spacer layer 133, passes through the transparent substrate 131a, is reflected by the reflective coating layer 131c, and returns to the inside of the light guiding spacer layer 133 for transmission. It is guided and guided to the hole 111 of the bottom plate 110 to be projected to the keycap 142, so that the keycap 142 has a distinct bright light display effect.

In some embodiments, the reflective sheet 132 is a substrate made of a non-transparent material having a reflective effect, or may be made of a transparent substrate printed with an ink having a reflective effect.

In some embodiments, the light guiding spacer layer 133 has a plurality of light diffusing structures (not shown). The light diffusion structure may be disposed on a top surface or a bottom surface of the light guiding spacer layer 133. In some embodiments, the light diffusing structure can form a dot-like reflective pattern or be a recessed structure. By controlling the shape, size and arrangement of the light diffusing structure, the light intensity of the light conducted in the light guiding spacer layer 133 can be uniform and uniform throughout the light guiding spacer layer 133.

In the present embodiment, the orthographic projection of the reflective coating 131c on the anti-ESD/EMI shielding coating 131b is aligned with the outer edge of the anti-ESD/EMI shielding coating 131b, but the present invention is not limited thereto. In practical applications, the orthographic projection of the reflective coating 131c on the anti-ESD/EMI shielding coating 131b may be included within the outer edge of the anti-ESD/EMI shielding coating 131b. It can be seen that, similarly to the anti-ESD/EMI shielding coating 131b in FIG. 5, the reflective coating 131c is substantially in the form of a grid. The reflective coating 131c also extends at the gap between the button assemblies 140 when the keyboard 100 is viewed from above.

In some embodiments, the color of the anti-ESD/EMI masking coating 131b is black (eg, containing black ink or mixed with carbon powder), while the reflective coating 131c is white (eg, containing white ink). With the foregoing configuration, when the user uses the keyboard 100, only the black anti-ESD/EMI shielding coating 131b is seen by the gap between the button assemblies 140, and the white reflective coating is not seen. The layer 131c is such that the illuminating effect of the keyboard 100 is more remarkable.

Please refer to FIG. 6 , which is an exploded cross-sectional view showing a portion of the bottom plate 110 , the light shielding sheet 231 and the light guiding spacer layer 133 of another embodiment of the present invention. As shown in FIG. 6, in the present embodiment, the light shielding sheet 231 includes a transparent substrate 231a, an anti-ESD/EMI shielding coating 231b, a reflective coating 231c, and an ink coating 231d, wherein the transparent substrate 231a, anti-ESD/ The EMI shielding coating 231b and the reflective coating 231c are the same as the transparent substrate 131a, the anti-ESD/EMI shielding coating 131b and the reflective coating 131c shown in FIG. 4, and the related description is omitted, and details are not described herein again. It is to be noted that the light shielding sheet 231 of the present embodiment further includes an ink coating layer 231d as compared with the light shielding sheet 131 shown in FIG. The ink coating 231d is disposed between the transparent substrate 231a and the reflective coating 231c.

In some embodiments, the orthographic projection of reflective coating 231c on ink coating 231d is encompassed within the outer edge of ink coating 231d. In some embodiments, the color of the anti-ESD/EMI masking coating 131b is not limited to black, the color of the ink coating 231d is black (eg, including black ink), and the reflective coating 231c is white (eg, containing white ink) . With the foregoing configuration, when the user uses the keyboard 100, only the black ink coating 231d is seen by the gap between the button assemblies 140, and the white reflective coating 231c is not seen, so that the keyboard 100 is The luminous effect is more remarkable.

Please refer to FIG. 7 , which is a schematic cross-sectional view showing a part of components of the keyboard 300 according to another embodiment of the present invention. As shown in FIG. 7 , in the present embodiment, the keyboard 300 also includes the bottom plate 110 , the thin film circuit board 120 , and the backlight module 130 of the embodiment shown in FIG. 2 (only the backlight module is illustrated in FIG. 7 ). The light shielding sheet 131 of the 130 and the light guiding spacer layer 133) and a plurality of button components 140 (only the key cap 142 of the button assembly 140 is shown in FIG. 7), so these components can be referred to the related description, and will not be described herein. It should be noted that the keyboard 300 of the present embodiment further includes a cover plate 360 compared to the embodiment shown in FIG. 2 . Similar to the appearance of the anti-ESD/EMI shielding coating 131b in FIG. 5, the cover plate 360 is also substantially grid-like. When the keyboard 300 is viewed from above, the cover plate 360 also extends over the gap between the button assemblies 140, and further enhances the effect of preventing light from leaking out of the gap between the button assemblies 140. While the keycap 142 of the button assembly 140 is pressed, it can be moved into the area within the grid of the cover plate 360. It can be seen that the present invention can also be applied to the keyboard 300 including the cover 360.

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 provided with an anti-ESD/EMI shielding coating containing carbon powder on the light shielding film of the backlight module, and utilize this The anti-ESD/EMI masking coating contacts the backplane. Therefore, the anti-ESD/EMI shielding coating can not only prevent the light generated by the backlight module from leaking out through the gap between the button components, but also perform electrostatic discharge test and electromagnetic interference test on the key device and keyboard of the present invention. Effectively avoid damage to the backlight module.

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.

110‧‧‧floor

131‧‧‧shading film

131a‧‧‧Transparent substrate

131b‧‧‧Anti-ESD/EMI masking coating

131c‧‧·Reflective coating

133‧‧‧Light guide spacer

150‧‧‧ adhesive layer

Claims (22)

A button device includes: a bottom plate; a thin film circuit board disposed on the bottom plate; a button assembly disposed on the thin film circuit board; and a backlight module disposed on a side of the bottom plate away from the thin film circuit board And comprising a light shielding film comprising: a transparent substrate; and an anti-ESD/EMI shielding coating disposed on the transparent substrate and in contact with the bottom plate. The button device of claim 1, wherein the anti-ESD/EMI masking coating comprises carbon powder. The button device of claim 2, wherein the anti-ESD/EMI shielding coating is a colloid layer mixed with one of the carbon powders. The button device of claim 2, wherein the anti-ESD/EMI shielding coating is an ink layer mixed with one of the toners. The button device of claim 1, wherein the light shielding film further comprises a reflective coating disposed on a side of the transparent substrate away from the anti-ESD/EMI shielding coating. The button device of claim 5, wherein one of the reflective coatings on the anti-ESD/EMI shielding coating is covered by an outer edge of the anti-ESD/EMI shielding coating. The button device of claim 5, wherein the light shielding film further comprises an ink coating disposed between the transparent substrate and the reflective coating. The button device of claim 7, wherein an orthographic projection of the reflective coating on the ink coating is within an outer edge of the ink coating. The key device of claim 1, wherein the backlight module further comprises: a reflective sheet on a side of the light shielding sheet away from the bottom plate; a light guiding spacer layer having an accommodating space, wherein the reflecting The film and the light shielding film are separated from opposite sides of the light guiding spacer layer; and a light source is at least partially received in the receiving space. The button device of claim 9, wherein the light shielding sheet and the light guiding spacer are adhered via an adhesive layer. A keyboard comprising: a bottom plate; a thin film circuit board disposed on the bottom plate; a plurality of button assemblies disposed on the film circuit board; and a backlight module disposed on a side of the bottom plate away from the film circuit board and including a light shielding film, The light shielding sheet comprises: a transparent substrate; and an anti-ESD/EMI shielding coating disposed on the transparent substrate and in contact with the bottom plate. The keyboard of claim 11, wherein the anti-ESD/EMI masking coating comprises carbon powder. The keyboard of claim 12, wherein the anti-ESD/EMI shielding coating is a colloid layer mixed with one of the carbon powders. The keyboard of claim 12, wherein the anti-ESD/EMI masking coating is an ink layer mixed with one of the toners. The keyboard of claim 11, wherein the light shielding film further comprises a reflective coating disposed on a side of the transparent substrate away from the anti-ESD/EMI shielding coating. The keyboard of claim 15 wherein one of the reflective coatings on the anti-ESD/EMI shielding coating is within the outer edge of the anti-ESD/EMI shielding coating. The keyboard of claim 15, wherein the light shielding sheet further comprises an ink coating disposed between the transparent substrate and the reflective coating. The keyboard of claim 17, wherein an orthographic projection of the reflective coating on the ink coating is within an outer edge of the ink coating. The keyboard of claim 15 wherein the reflective coating is substantially grid-like and the reflective coating extends across the gap between the button assemblies when the keyboard is viewed from above. The keyboard of claim 11, wherein the backlight module further comprises: a reflective sheet on a side of the light shielding sheet away from the bottom plate; a light guiding spacer layer having at least one receiving space, wherein the reflecting The film and the light shielding film are separated from opposite sides of the light guiding spacer layer; and at least one light source is at least partially received in the corresponding receiving space. The keyboard of claim 20, wherein the light shielding sheet and the light guiding spacer layer are adhered via an adhesive layer. The keyboard of claim 11, wherein the anti-cord The ESD/EMI masking coating is substantially grid-like, and the ESD/EMI shielding coating extends across the gap between the button assemblies when the keyboard is viewed from above.