TWI778398B - Keyswitch device - Google Patents

Abstract

A keyswitch device includes a base plate, a plurality of keyswitch assemblies, a backlight module, and a woven fiber layer. The keyswitch assemblies are disposed on the base plate. The backlight module is disposed under the base plate and has a heat-dissipating channel passing through the backlight module. The backlight module includes a light guide plate. The woven fiber layer is located between the base plate and the light guide plate and blocks the heat-dissipating channel.

Description

keyboard

The present invention relates to a keyboard.

In recent years, notebook computers have continued to evolve with design trends such as lightness and thinness, and heat dissipation in the body has become one of the main issues. In the keyboard part, the backlight module has gradually become one of the standard equipment.

However, if heat dissipation holes are designed on the backlight module for heat dissipation, there may be a problem of light leakage. Therefore, how to propose a keyboard that can solve the above-mentioned problems is one of the problems that the industry is eager to invest in research and development resources to solve.

In view of this, one objective of the present invention is to provide a keyboard that can solve the above problems.

In order to achieve the above object, according to an embodiment of the present invention, a keyboard includes a bottom plate, a plurality of key assemblies, a backlight module and a fiber braided layer. The button assembly is arranged on the bottom plate. The backlight module is arranged under the bottom plate and has a heat dissipation channel running through the backlight module. The backlight module comprises a light guide plate fiber braided layer located between the bottom plate and the light guide plate, and blocks the heat dissipation channel.

In one or more embodiments of the present invention, the fiber braided layer covers and contacts the side of the light guide plate facing the bottom plate.

In one or more embodiments of the present invention, the light guide plate has a first through hole. The backlight module further includes a reflection sheet. The reflection sheet is arranged on the side of the light guide plate away from the bottom plate, and has a second through hole communicated with the first through hole. The heat dissipation channel is composed of at least a first through hole and a second through hole.

In one or more embodiments of the present invention, the backlight module further includes a light shielding sheet. The light shielding sheet is arranged on the side of the light guide plate away from the reflection sheet, and has a third through hole communicating with the first through hole and the second through hole. The heat dissipation channel is further constituted by a third through hole.

In one or more embodiments of the present invention, the fiber braided layer covers and contacts a side of the light shielding sheet away from the light guide plate.

In one or more embodiments of the present invention, the fiber braided layer is laminated between the light guide plate and the light shielding sheet.

In one or more embodiments of the present invention, the fiber braid includes depressions. The concave portion is located in the heat dissipation channel and covers the inner wall of the first through hole.

In one or more embodiments of the present invention, the recessed portion completely covers and contacts the inner wall of the first through hole.

In one or more embodiments of the present invention, the fiber braid includes depressions. The concave portion is located in the heat dissipation channel and is concave away from the bottom plate.

In one or more embodiments of the present invention, the fiber braided layer completely covers the heat dissipation channel.

In one or more embodiments of the present invention, the woven fiber layer comprises resin fibers, synthetic fibers, cotton fibers, hemp fibers or silk fibers.

In one or more embodiments of the present invention, the mesh width of the fiber braided layer ranges from 0.015 mm to 0.03 mm.

In one or more embodiments of the present invention, the fiber braided layer is formed by interlacing a plurality of fibers. At least one mesh is formed between the fibers. The mesh holes correspond to the heat dissipation channels.

To sum up, in the keyboard of the present invention, the fiber braided layer is used to cover the heat dissipation channel of the backlight module, which can not only effectively solve the problem of light leakage from the heat dissipation channel of the backlight module, but also utilize the ventilation of the fiber braided layer itself. So that the heat dissipation channel can still maintain its heat dissipation effect.

The above descriptions are only used to describe the problems to be solved by the present invention, the technical means for solving the problems, and their effects, etc. The specific details of the present invention will be described in detail in the following embodiments and related drawings.

Several embodiments of the present invention will be disclosed in the drawings below, and for the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known structures and elements will be shown in a simple and schematic manner in the drawings. The same reference numbers will be used throughout the drawings to refer to the same or similar elements.

Please refer to FIG. 1 , which is a schematic diagram illustrating a keyboard 100 according to an embodiment of the present invention. As shown in FIG. 1 , the keyboard 100 of this embodiment can be an external keyboard (eg, a PS2 interface keyboard or a USB interface keyboard) used by a desktop computer or a computer system including an input device in the form of a keyboard (eg, Notebook or Laptop), but not limited thereto. In other words, the concept of the keyboard 100 of the present invention can be applied to any electronic product using a key device as an input interface.

Please refer to FIG. 2 , which is an exploded view showing some components of the keyboard 100 in FIG. 1 . As shown in FIGS. 1 and 2 , the keyboard 100 includes a bottom plate 110 , a plurality of key assemblies 120 (omitted in FIG. 2 , see FIG. 1 ), a backlight module 130 and a fiber braided layer 140 . The bottom plate 110 can be a rigid plate body made of metal (such as aluminum, steel, alloy, etc.) or plastic material and has the function of supporting the components. The key assembly 120 is disposed on the bottom plate 110 . The backlight module 130 is disposed under the bottom plate 110 . The fiber braided layer 140 is located between the bottom plate 110 and the backlight module 130 , and therefore does not affect the movement of the key assembly 120 . The backlight module 130 includes a light guide plate 131 , a reflection sheet 132 and a light source module 133 arranged under the fiber braided layer 140 . The light source module 133 includes a flexible circuit board and a light source (not shown, such as a light emitting diode) disposed thereon. The light source is configured to emit light into the light guide plate 131 . The reflection sheet 132 is disposed on the side of the light guide plate 131 away from the bottom plate 110 (ie, disposed below the light guide plate 131 ), and is configured to reflect the light traveling in the light guide plate 131 upward, so that the light is transmitted from the upper part of the light guide plate 131 . surface left. The light guide plate 131 can be made of a light guide material and has the function of guiding light. For example, the light guide plate 131 can be a plate made of polycarbonate (Polycarbonate, PC), acrylic (Polymethyl Methacrylate, PMMA) or glass material. body.

In some embodiments, the keyboard 100 may further include a circuit board (not shown). The circuit board can be disposed between the bottom plate 110 and the key assembly 120, and a key circuit is disposed thereon, so as to generate a corresponding key signal when the key cap of the key assembly 120 is triggered. In some embodiments, the aforementioned circuit board may be a rigid printed circuit board or a flexible circuit board, but the invention is not limited thereto.

In some embodiments, the button assembly 120 may further include a connector (not shown). The connector can be a scissor connector, a butterfly connector or a mechanical switch. One end of the connector is connected to the aforementioned keycap, and the other end is connected to the base plate 110 , thereby assembling the aforementioned keycap to the base plate 110 and guiding the aforementioned keycap to move up and down relative to the base plate 110 .

In some embodiments, the button assembly 120 may further include a reset member (not shown). The reset member can be disposed on the bottom plate 110, between the bottom plate 110 and the aforementioned keycap, and above the key circuit. When the keycap receives an external force and is pressed down, the reset element will generate a resistance to the keycap, thereby providing a user with a pressing feeling. When the external force applied to the keycap is released, the restoring element can provide a restoring force for the depressed keycap to return to the original unpressed position. In some embodiments, the reset member may be an elastic member, such as a rubber dome, a metal dome, or a spring. In other embodiments, the reset element can also be other elements with similar functions, such as magnetic elements.

Please refer to Figures 3 to 5. FIG. 3 is a top view showing the light guide plate 131 and the fiber braided layer 140 in the second figure. FIG. 4 is a partial top view illustrating a fiber braided layer 140 according to an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of the backlight module 130 and the fiber braided layer 140 in FIG. 2 . As shown in FIG. 3 and FIG. 5 , in this embodiment, the backlight module 130 has a plurality of heat dissipation channels C passing through it. Thus, for example, when the keyboard 100 of the present invention is installed in the main body casing of the notebook computer (not shown), the heat generated by the heat source (eg, the processor) in the main body casing can pass through the backlight module. The heat dissipation channel C of 130 is dissipated to the outside of the host casing. Specifically, as shown in FIG. 5 , each heat dissipation channel C is formed by a first through hole 131 a of the light guide plate 131 and a second through hole 132 a of the reflection sheet 132 communicating with each other. The fiber braided layer 140 covers and contacts the side of the light guide plate 131 away from the reflection sheet 132 , so as to block the heat dissipation channel C. As shown in FIG. In other words, the fiber braided layer 140 covers and contacts the light guide plate 131 and is disposed on the side of the light guide plate 131 facing the bottom plate 110 . As shown in FIG. 3 , the fiber braided layer 140 completely covers the heat dissipation channel C. As shown in FIG. The fiber braided layer 140 may be disposed on the side of the light guide plate 131 away from the reflection sheet 132 by means of adhesion, but is not limited thereto.

In some embodiments, the fiber braided layer 140 is a one-piece structure woven from fiber strands. Specifically, as shown in FIG. 4, the fiber braided layer 140 is woven from a plurality of fibers 141a extending in the lateral direction and a plurality of fibers 141b extending in the longitudinal direction. The fibers 141a, 141b are staggered up and down. Specifically, each fiber 141a passes through the fiber 141b alternately from above and below, and each fiber 141b also passes through the fiber 141a alternately from above and below. A plurality of mesh holes 141c are formed between the fibers 141a and 141b. When the light is irradiated by the light source module 133 below, a part of the light is blocked by the fibers 141a and 141b and cannot pass through, and only a small amount of light can pass through the mesh hole 141c, thereby realizing the shading effect of the fiber braided layer 140. In addition, since it is woven, the fiber braided layer 140 is not completely airtight, but allows air to flow through the mesh 141c. When the fiber braided layer 140 is disposed on the light guide plate 131, the mesh holes 141c corresponding to the heat dissipation channel C can achieve the effect of ventilation and heat dissipation.

With the aforementioned structure and configuration, the fiber braided layer 140 can not only effectively solve the problem of direct light leakage from the backlight module 130 through the heat dissipation channel C, but also utilize its own ventilation properties so that the heat dissipation channel C can still maintain its heat dissipation effect.

In some embodiments, the woven fiber layer 140 includes resin fibers, synthetic fibers, cotton fibers, hemp fibers or silk fibers, but the present invention is not limited thereto.

In some embodiments, the fiber braided layer 140 is a mesh layer, a woven fabric layer or a non-woven fabric layer, but the present invention is not limited thereto.

In some embodiments, the width of the meshes 141c of the fiber woven layer 140 is in the range of 0.015 millimeters (millimeter, mm) to 0.03 millimeters. If the width of the mesh hole 141c is larger than this range, the shading ability of the fiber braided layer 140 will be significantly deteriorated; if the mesh hole 141c width is smaller than this range, the air permeability of the fiber braided layer 140 will be significantly deteriorated. In other words, through the above-mentioned width design of the mesh holes 141c, the mesh holes 141c can achieve the effect of air permeability without being too large to affect the light-shielding ability of the fiber woven layer 140. The mesh holes 141c can have a width within the above range Sufficient shade and breathability. However, depending on the practical application, the shading ability and/or the air permeability of the fiber woven layer 140 can be adjusted by adjusting the width of the mesh holes 141c of the fiber woven layer 140 .

In some embodiments, the light-shielding ability of the fiber braided layer 140 can be adjusted through the colors of the fibers 141a and 141b. For example, the shading ability of the fiber woven layer 140 woven with black fibers 141a and 141b is better than that of the fiber woven layer 140 woven with white fibers 141a and 141b.

In addition, as shown in FIG. 2 and FIG. 3 , the fiber braided layer 140 can also be patterned to form a plurality of light-transmitting parts 142 , and the light-transmitting parts 142 correspond to the upper button assemblies 120 respectively. In some embodiments, the light-transmitting portion 142 may be formed by cutting with die stamping or laser, but the present invention is not limited thereto. The light can be irradiated to the key assembly 120 through the aforementioned light-transmitting portion 142 . When the light traveling in the light guide plate 131 exits from the upper surface of the light guide plate 131 or the first through hole 131a of the light guide plate 131, it will be blocked by the fiber braided layer 140 and only a small amount of light can pass through the mesh hole 141c. It can be seen from this that the fiber braided layer 140 can reduce the brightness of the passing light, thereby achieving the effect of shading.

Please refer to FIG. 6 , which is a schematic cross-sectional view illustrating a backlight module 230 and a fiber woven layer 140 according to another embodiment of the present invention. Compared with the embodiment shown in FIG. 5 , the backlight module 230 of this embodiment further includes a light shielding sheet 234 . The light shielding sheet 234 is, for example, a polyester film (mylar) printed with ink. The light shielding sheet 234 is disposed on the side of the light guide plate 131 away from the reflection sheet 132 , and has a third through hole 234 a communicating with the first through hole 131 a and the second through hole 132 a. The heat dissipation channel C is composed of a first through hole 131a, a second through hole 132a and a third through hole 234a. The fiber braided layer 140 covers and contacts the side of the light shielding sheet 234 away from the light guide plate 131 . The fiber braided layer 140 may be disposed on the side of the light shielding sheet 234 away from the light guide plate 131 by means of adhesion, but is not limited thereto. By adding the light shielding sheet 234 , it can be further ensured that the light can only leave the portion of the light guide plate 131 that is not blocked by the light shielding sheet 234 and reach the upper button assembly 120 . Since the heat dissipation channel C is covered by the fiber braided layer 140 , the light leaving the heat dissipation channel C can be shielded to avoid light leakage. The heat dissipation channel C covered by the fiber braided layer 140 can still maintain its heat dissipation effect.

The stacking method of the backlight module 230 and the fiber braided layer 140 is not limited to the embodiment shown in FIG. 6 . Please refer to FIG. 7 , which is a schematic cross-sectional view illustrating a backlight module 330 and a fiber woven layer 140 according to another embodiment of the present invention. As shown in FIG. 7 , the backlight module 330 includes a reflective sheet 132 , a light guide plate 131 and a light shielding sheet 234 . The functions and relative positions of these elements are the same or similar to the embodiment shown in FIG. 6 . Explanation, which will not be repeated here. Compared with the embodiment shown in FIG. 6 , the fiber braided layer 140 of this embodiment is superimposed between the light guide plate 131 and the light shielding sheet 234 . In other words, in this embodiment, the fiber braided layer 140 is integrated with the backlight module 330 .

Please refer to FIG. 8 , which is a schematic cross-sectional view of a backlight module 430 and a fiber braided layer 440 according to another embodiment of the present invention. As shown in FIG. 8 , the backlight module 430 includes a reflective sheet 132 and a light guide plate 131 . The functions and relative positions of these elements are the same or similar to the embodiment shown in FIG. 5 . I won't go into details. Compared with the embodiment shown in FIG. 5 , the fiber braided layer 440 of this embodiment includes a flat portion 441 and a concave portion 442 . The flat part 441 is flatly attached to the side of the light guide plate 131 away from the reflection sheet 132 . The recessed portion 442 is located in the heat dissipation channel C and covers the inner wall of the first through hole 131a. Thereby, the fiber braided layer 440 can further enhance the effect of blocking the light leaking from the heat dissipation channel C. As shown in FIG.

In order to better solve the problem of light leakage of the backlight module 430 in the heat dissipation channel C, the concave portion 442 can be designed to completely cover and contact the inner wall of the first through hole 131a, as shown in FIG. 8 .

In practical applications, the fiber braided layer 140 has a certain degree of flexibility. The fiber braided layer 140 shown in FIG. 5 can be placed on the light guide plate 131 first, and then the fiber braided layer 140 can be positioned directly above the heat dissipation channel C by using a tool. The part of the fiber is squeezed into the heat dissipation channel C to form the fiber braided layer 440 shown in FIG. 8 . That is to say, the portion of the woven fiber layer 140 shown in FIG. 5 that is not pressed by the tool forms the flat portion 441 of the woven fiber layer 440 shown in FIG. 8, and the woven fiber layer 140 shown in FIG. 5 is formed. The portion squeezed by the tool into the heat dissipation channel C forms the concave portion 442 of the fiber braided layer 440 shown in FIG. 8 .

Please refer to Figure 9 and Figure 10. FIG. 9 is a schematic cross-sectional view illustrating a backlight module 530 and a fiber braided layer 440 according to another embodiment of the present invention. FIG. 10 is a schematic cross-sectional view illustrating a backlight module 630 and a fiber braided layer 440 according to another embodiment of the present invention. As shown in FIG. 9 , the backlight module 530 includes a reflective sheet 132 , a light guide plate 131 and a light shielding sheet 234 . The functions and relative positions of these elements are the same or similar to the embodiment shown in FIG. 6 . Explanation, which will not be repeated here. As shown in FIG. 10, the backlight module 630 includes a reflective sheet 132, a light guide plate 131 and a light shielding sheet 234. The functions and relative positions of these elements are the same or similar to the embodiment shown in FIG. description, which will not be repeated here. Compared with the embodiments shown in Fig. 6 and Fig. 7, the embodiments shown in Figs. 9 and 10 are changed to use the fiber woven layer 440 shown in Fig. 8, which can also better solve the problem. The problem of light leakage in the heat dissipation channel C of the backlight modules 530 and 630 .

From the above detailed description of the specific embodiments of the present invention, it can be clearly seen that the fiber braided layer is used to cover the heat dissipation channel of the backlight module, which can not only effectively solve the problem of light leakage from the heat dissipation channel of the backlight module, but also use The ventilation of the fiber woven layer itself enables the heat dissipation channel to maintain its heat dissipation effect.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

100: Keyboard 110: Bottom plate 120: Button assembly 130, 230, 330, 430, 530, 630: Backlight Modules 131: light guide plate 131a: first through hole 132: Reflector 132a: second through hole 133: Light source module 140,440: Fiber Braid 141a, 141b: Fiber 141c: mesh 142: Translucent part 234: Shades 234a: third through hole 441: Flat applicator 442: Depression C: cooling channel

In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows: FIG. 1 is a schematic diagram illustrating a keyboard according to an embodiment of the present invention. FIG. 2 is an exploded view showing some components of the keyboard in FIG. 1 . FIG. 3 is a top view showing the light guide plate and the fiber braided layer in FIG. 2 . FIG. 4 is a partial top view illustrating a fiber braided layer according to an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of the backlight module and the fiber braided layer in FIG. 2 . FIG. 6 is a schematic cross-sectional view illustrating a backlight module and a fiber braided layer according to another embodiment of the present invention. FIG. 7 is a schematic cross-sectional view illustrating a backlight module and a fiber braided layer according to another embodiment of the present invention. FIG. 8 is a schematic cross-sectional view illustrating a backlight module and a fiber braided layer according to another embodiment of the present invention. FIG. 9 is a schematic cross-sectional view illustrating a backlight module and a fiber braided layer according to another embodiment of the present invention. FIG. 10 is a schematic cross-sectional view illustrating a backlight module and a fiber braided layer according to another embodiment of the present invention.

130: Backlight module

131: light guide plate

131a: first through hole

132: Reflector

132a: second through hole

140: Fiber Braid

C: cooling channel

Claims (12)

A keyboard, comprising: a base plate; a plurality of key assemblies arranged on the base plate; a backlight module set under the base plate and having a heat dissipation channel running through the backlight module, the backlight module comprising a light guide plate ; And a fiber braided layer, located between the bottom plate and the light guide plate, and shields the heat dissipation channel, wherein the fiber braided layer is formed by a plurality of fibers staggered, at least one mesh is formed between these fibers, the at least one mesh The holes correspond to the heat dissipation channels. The keyboard of claim 1, wherein the fiber braided layer covers and contacts a side of the light guide plate facing the bottom plate. The keyboard according to claim 1, wherein the light guide plate has a first through hole, and the backlight module further comprises: a reflection sheet disposed on a side of the light guide plate away from the bottom plate and having a through hole connected to the first through hole. The hole communicates with a second through hole, wherein the heat dissipation channel is formed by at least the first through hole and the second through hole. The keyboard of claim 3, wherein the backlight module further comprises a light-shielding sheet, the light-shielding sheet is disposed on a side of the light guide plate away from the reflection sheet, and has the first through hole and the second through hole A third through hole is communicated with, and the heat dissipation channel is further formed by the third through hole to make. The keyboard of claim 4, wherein the fiber braided layer covers and contacts a side of the light shielding sheet away from the light guide plate. The keyboard of claim 4, wherein the fiber braided layer is laminated between the light guide plate and the light shielding sheet. The keyboard of claim 3, wherein the fiber braided layer includes a concave portion, and the concave portion is located in the heat dissipation channel and covers the inner wall of the first through hole. The keyboard of claim 7, wherein the recessed portion completely covers and contacts the inner wall of the first through hole. The keyboard of claim 1, wherein the fiber braided layer includes a concave portion, and the concave portion is located in the heat dissipation channel and is concave away from the bottom plate. The keyboard of claim 1, wherein the fiber braided layer completely covers the heat dissipation channel. The keyboard of claim 1, wherein the woven fiber layer comprises resin fibers, synthetic fibers, cotton fibers, hemp fibers or silk fibers dimension. The keyboard of claim 1, wherein a mesh width of the fiber braided layer is in the range of 0.015mm to 0.03mm.

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