TWM461863U - Keyboard - Google Patents

Abstract

A keyboard comprises a key-module and a backlight module. The key-module includes at least a light-pass-through key unit and a circuit board. The backlight module includes a light-guide plate, a reflecting element and at least a light source. Said backlight module is deposited between the key unit and the circuit board that the light-guide plate of the backlight module face to the key unit, and the reflecting element face to the back of the light-guide plate. The light emitted from the light source, which placed the side of the light-guide plate projects into the light-guide plate. The light directly reflected from the reflecting element through the light-emitting surface of the light-guide plate and the key unit in order to enhance the light-emitting efficiency of the keyboard.

Description

keyboard

The invention relates to an input device connected or arranged in an electronic device such as a computer or a mobile phone, in particular to a keyboard with a light-emitting function.

The keyboard of the early notebook or desktop computer could not be illuminated, but with the advancement of the backlight module technology, manufacturers have set up the lighting device on the keyboard, so that the keyboard itself has the lighting effect, but also has the decorative effect. .

The conventional illuminated keyboard includes a button module and a backlight module. The button module has a bottom plate. The bottom plate is provided with at least one light transmissive button that can move up and down relative to the bottom plate; the backlight module is disposed on the button module. Below, and fixed with the button module. Thereby, the backlight module can provide a light source from under the button module, and the light passes through the light-transmissive button to make the button emit a light-emitting effect. Due to the trend of light, thin and short electronic products, today's illuminated keyboards not only provide keyboard lighting effects, but also reduce the thickness of the keyboard.

The conventional technology provides a thin standard keyboard, which comprises a circuit substrate disposed on a bottom plate and a transparent plate. The transparent plate is provided with a light guide plate and a light source electrically connected to the circuit substrate. The light source can project light from the side of the light guide plate into the light guide plate; an outer film with a plurality of key caps is disposed on the outermost layer of the keyboard. When one of the key caps on the outer diaphragm is pressed, the key cap presses the membrane switch on the circuit substrate via the corresponding elastic piece to output a button signal. Wherein, the bottom plate and the circuit substrate have a reflective sheet, so part of the light emitted by the light source can be reflected by the bottom plate through the circuit substrate, and then the light guide plate and the outer diaphragm are passed out to exhibit a luminous effect.

However, due to the poor light transmission of the circuit board, plus reflection The light must pass through the above plurality of different media, and finally the outer film is worn out, so that the amount of light reflected off the outer film is greatly reduced, and the luminous efficiency of the entire keyboard is lowered.

The purpose of the present invention is to solve the structure of the conventional illuminating keyboard, because the light is blocked by more media before the light is passed out of the light guide plate, which causes the light output to be reduced when the light finally passes out of the button, so that the luminous efficiency of the entire keyboard cannot be further improved. .

The feature of the present invention is that in the backlight module included in the illuminated keyboard, the reflective component is directly disposed on the back surface of the light guide plate relative to the light emitting surface, and the circuit substrate is disposed on the back surface of the reflective component relative to the reflective surface thereof, thereby After being projected into the light guide plate from the side of the light guide plate, the light is directly reflected and passed through the light guide plate and the button portion by the reflective element, so that the reflected light is blocked by a small amount of medium, thereby achieving the effect of increasing the amount of light emitted by the button portion.

The keyboard provided by the present invention provides a button module and a backlight module. The button module includes a light transmissive button portion and a circuit substrate. The backlight module includes a light guide plate and a reflective component. And a light source; the backlight module is disposed between the button portion and the circuit substrate, the light emitting surface of the light guide plate faces the button portion, and the reflective element faces the back surface of the light guide plate relative to the light emitting surface; the light source is electrically connected to the circuit substrate, and The light source faces the light incident surface on the side of the light guide plate, and the light emitted by the light source is projected from the side into the light guide plate, and the light is directly reflected by the light guide plate and the button portion by the reflective component, thereby reducing the light to be hindered by the excessive medium. The amount of light that passes through the button.

The illuminating keyboard provided by the present invention comprises a button module suitable for a flexible button diaphragm having a plurality of key caps.

The illuminating keyboard provided by the present invention comprises a backlight module, which uses a light-emitting diode (LED) as a light source, thereby reducing the volume of the backlight module and the overall keyboard.

The illuminating keyboard provided by the new model further comprises a button module and a back The optical modules are collectively disposed on a base.

In an embodiment, the present invention can be provided with a plurality of corresponding through holes and through holes respectively in the light guide plate and the reflective element of the backlight module, and a corresponding elastic piece is disposed in the through hole and the through hole, and on the back side of the button portion The plurality of protrusions corresponding to the position of the spring piece are disposed, so that when the keycap is pressed, the protrusion is applied to the elastic piece to deform, and then the circuit switch is activated to generate a button signal.

In an embodiment, the present invention can provide a plurality of through holes in the reflective component of the backlight module, a spring is disposed in the through hole, and the elastic piece is connected to the back surface of the light guide plate, and a plurality of pairs are disposed on the back side of the button portion. The protrusion at the position of the spring piece is used, so that when the key cap is pressed, the protrusion is applied to the elastic piece to deform, and then the circuit switch is activated to generate a button signal.

In an embodiment, the present invention can connect a plurality of elastic pieces to the reflective element corresponding to the position of the elastic piece in the backlight module, and a plurality of protrusions corresponding to the position of the elastic piece on the back side of the light guide plate, so that when the key cap is pressed, The protrusion is applied to the elastic piece to deform, and then the circuit switch is activated to generate a button signal.

1‧‧‧ button module

110‧‧‧Key diaphragm

11‧‧‧Keys

111‧‧‧Key Cap

111a‧‧‧Key Cap

112‧‧‧ protrusion

12‧‧‧ circuit board

120‧‧‧Circuit switch

121‧‧‧Upper diaphragm

122‧‧‧ lower diaphragm

123‧‧‧Insulation

124‧‧‧ hole

125‧‧‧Upper electrode

126‧‧‧ lower electrode

2‧‧‧Backlight module

21‧‧‧Light guide

211‧‧‧Into the glossy surface

212‧‧‧Glossy surface

213‧‧‧ back

214‧‧‧

215‧‧‧through holes

22‧‧‧reflecting elements

221‧‧‧through hole

222‧‧‧reflecting surface

23‧‧‧Light source

24‧‧‧Shrap

3‧‧‧Base

31‧‧‧ bottom

32‧‧‧ side wall

The first figure is a plan sectional exploded view showing the main component combination relationship of the first embodiment of the novel illuminated keyboard.

The second figure is a plan sectional view showing the combined structure of the first embodiment of the novel illuminated keyboard.

The third figure is a partial enlarged view of the circuit board structure of the present invention in part A of the first figure.

The fourth figure is a plan sectional exploded view showing the main component combination relationship of the second embodiment of the novel illuminated keyboard.

Figure 5 is a plan sectional view showing the combined structure of the second embodiment of the present illuminated keyboard.

Fig. 6 is a plan sectional exploded view showing the main component combination relationship of the third embodiment of the novel illuminated keyboard.

Figure 7 is a plan sectional view showing the combined structure of the third embodiment of the novel illuminated keyboard.

Figure 8 is a plan sectional exploded view showing the main component combination relationship of the fourth embodiment of the novel illuminated keyboard.

Figure 9 is a plan sectional exploded view showing the main component combination relationship of the fifth embodiment of the novel illuminated keyboard.

The embodiments of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present invention after studying the present specification.

The first embodiment and the second figure show a first embodiment of the illuminating keyboard provided by the present invention, including a button module 1 and a backlight module 2; wherein the button module 1 further includes a button portion 11 and a circuit substrate 12; the button portion 11 may be a flexible button, and a plurality of key caps 111 are disposed on the upper surface, and the button film 110 is provided on the lower surface of the plurality of protrusions 112. The button film 110 may be a thermoplastic polyurethane. (The film made of Thermoplastic Polyurethane, TPU); the protrusion 112 may be made of the same or different material than the button film 110; the button portion 11 is made of a material that can transmit light, and a predetermined word is set on the surface of the keycap. Type, pattern or symbol.

Referring to the third figure, the structure of the partially enlarged view of the portion A of the circuit substrate 12 shown in the first figure includes an upper diaphragm 121, a lower diaphragm 122 and an insulating layer 123; the insulating layer 123 is sandwiched thereon. Between the diaphragm 121 and the lower diaphragm 122; a lower electrode 126 is disposed on the surface of the lower diaphragm 122 facing the upper diaphragm 121, and an upper electrode 125 is disposed on the surface of the upper diaphragm 121 facing the lower diaphragm 122; the insulating layer 123 A hole 124 is formed, and a portion of the upper electrode 125 and a portion of the lower electrode 126 are exposed to the hole 124. The electrode 125 and the lower electrode 126 corresponding to the hole 124 form a membrane switch 120. In the third embodiment, only one hole 124 is drawn, and a membrane switch 120 is taken as an example. In the practical application embodiment, the insulating layer 123 has a plurality of holes. The holes 124, and each of the holes 124 correspond to an upper electrode 125 and a lower electrode 126, respectively, to form a plurality of membrane switches 120. When the upper diaphragm 121 is pressed so that the upper electrode 125 contacts the lower electrode 126 through the hole 124, an electrical path is formed to output a button signal.

Referring to the first, second and third figures, the backlight module 2 of the novel illuminated keyboard has a flexible light guide plate 21, a flexible reflective element 22 and a light source 23; In a preferred embodiment, the light source 23 is a light emitting diode (LED); the light guide plate 21 is made of an optical material having good light guiding properties and has a flat shape with a suitable thickness, and at least one side thereof is made. The light-incident surface 211 is a light-emitting surface 212, and the other surface of the light-emitting surface 212 is a back surface 213. The light guide plate 21 can be provided with a plurality of through holes 215 corresponding to the position of the circuit switch 120 on the circuit board 12. The reflective element 22 can be a diaphragm, at least one side of which is a reflective surface 222 that can reflect light. The reflective surface 222 can be white, or can be a mirror surface, or any surface suitable for reflection; the reflective element 22 is provided A plurality of through holes 221 corresponding to the through holes 215. A spring piece 24 is disposed in each of the corresponding through holes 215 and the through holes 221, respectively. If the elastic piece 24 is disposed in the through hole 215 and the through hole 221, the adhesive hole or other adhesive element may be adhered to fix the through hole 215, the through hole 221 and the elastic piece 24; or the adhesive or other adhesive element may not be disposed, and the elastic piece 24 may be directly used. It is movable in the through hole 215 and the through hole 221. The back surface 213 of the light guide plate 21 and the reflective surface 222 of the reflective member 222 may be bonded to each other by using an adhesive or other adhesive member, or may be bonded without using an adhesive or other adhesive member.

The present invention also provides a base 3 that includes a bottom portion 31 and side walls 32 that are coupled to the sides of the bottom portion 31 and extend upwardly. The button module 1 and the backlight module 2 are mounted on the bottom 31 of the base 3, and the periphery of the button module 1 and the backlight module 2 are restrained by the side wall 32 to form a button device that can emit light. The method of assembling the circuit board 12 is first disposed on the bottom portion 31, and then the reflective member 22 is disposed on the back surface 213 of the light guide plate 21, the through hole 215 is corresponding to the through hole 221, and the light guide plate 21 is disposed together with the reflective member 22. On the bottom portion 31, a spring piece 24 is disposed in the corresponding through hole 215 and the through hole 221, so that each of the elastic pieces 24 respectively corresponds to In the circuit switch 120, the light source 23 electrically connected to the circuit board 12 corresponds to the light incident surface 211 of the light guide plate 21; finally, the button portion 11 is mounted on the light guide plate 21 such that the bottom portion of the button portion 11 faces the light exit surface. In the present invention, the key film 110 having the plurality of key caps 111 on the upper surface is used as an embodiment, so that the key film 110 covers the side wall 32 and the partial bottom portion 31 of the base 3.

When the user operates the button portion 11 and presses the key cap 111, the protrusion 112 under the key cap 111 will touch the light guide plate 21 and the reflective member 22, thereby compressing the elastic piece 24 and transmitting the force to the upper diaphragm of the circuit substrate 12. 121, the upper electrode 125 is in contact with the lower electrode 126 through the hole 124 to form an electrical path to output a button signal; when the force applied to the key cap 111 is released, the compressed spring 24 will reflect the element. 22 and the light guide plate 21 bounce, the reflective element 22, the light guide plate 21 and the button portion 11 are returned to the original position, and the upper diaphragm 121 of the circuit substrate 12 is also restored to its original state by its own elasticity, so that the upper electrode 125 and the lower electrode 126 Separate to form an electrical circuit. When the light source 23 is turned on by the current, the light is projected from the light incident surface 211 on the side of the light guide plate 21 into the light guide plate 21, and the light can directly pass through the light exit surface 212 and the button portion 11, and the light can be reflected by the reflective member 22. The reflecting surface 222 is reflected through the light-emitting surface 212 and the button portion 11, and the light output is maximized under the condition that the light is blocked by the minimum medium, thereby improving the luminous efficiency of the button device.

The fourth and fifth figures show a second embodiment of the novel illuminated keyboard, which has a structure substantially similar to that of the first embodiment described above; however, wherein the back surface of the reflective element 22 is provided with a plurality of corresponding circuit substrates 12 The elastic piece 24 at the position of the circuit switch 120; the combination of the elastic piece 24 and the reflective element 22, the elastic piece 24 can be directly adhered to the back surface of the reflective element 22 by an adhesive or other adhesive element. The reflective element 22 can be a diaphragm having at least one side that is a reflective surface 222 that can reflect light. The back surface 213 of the light guide plate 21 is provided with a plurality of protrusions 214 corresponding to the positions of the elastic pieces 24. The light-emitting surface 212 of the light guide plate 21 and the lower surface of the button portion 111 may be bonded to each other by using an adhesive or other adhesive member, or may be bonded without using an adhesive or other adhesive member.

The button module 1 and the backlight module 2 of the second embodiment are mounted on the bottom 31 of the base 3, and the periphery of the button module 1 and the backlight module 2 are restricted by the side wall 32 to form a group. Button device. The circuit board 12 is first disposed on the bottom portion 31, and then the reflective member 22 on which the elastic member 24 is disposed is disposed on the circuit substrate 12, so that the respective elastic pieces 24 respectively correspond to a circuit switch 120, and then the light guide plate 21 is disposed. The reflective element 22 is disposed such that the reflective surface 222 faces the back surface 213 of the light guide plate 21, and the light source 23 electrically connected to the circuit board 12 corresponds to the light incident surface 211 of the light guide plate 21; finally, the button portion 11 is mounted on the light guide surface 11 On the light plate 21, the lower surface of the button portion 11 is directed toward the light exit surface 212.

When the user presses the button portion 11 and presses the key cap 111, the key cap 111 will touch the light guide plate 21, thereby causing the protrusion 214 to compress the elastic piece 24 under the reflective member 22, and the force is transmitted to the circuit substrate 12 to be touched. The circuit switch 120 forms an electrical path to output a button signal; when the force applied to the keycap 111 is released, the compressed spring 24 bounces the reflective element 22 and the light guide plate 21 to cause the reflective element 22 to The light guide plate 21 and the button portion 11 are returned to the original position, and the circuit switch 120 also uses its own elasticity to return to the original state to form an electrical disconnection.

6 and 7 show a third embodiment of the novel illuminated keyboard, which has a structure substantially similar to that of the first embodiment described above; however, wherein the reflective element 22 is provided with a plurality of circuit switches corresponding to the circuit substrate 12. The through hole 221 of the 120 position is provided with a spring piece 24 in the through hole 221, and the elastic piece 24 is connected to the back surface 213 of the light guide plate 21. The reflective element 22 can be a diaphragm having at least one side a reflective surface 222 that can reflect light. When the elastic piece 24 is disposed in the through hole 221, an adhesive or other adhesive component may be adhered and fixed between the through hole 221 and the elastic piece 24; or an adhesive or other adhesive component is not disposed, and the elastic piece 24 is directly passed through the through hole 221 It is connected to the back surface of the light guide plate 21. The back surface 213 of the light guide plate 21 and the reflective surface 222 of the reflective member 222 may be bonded to each other using an adhesive or other adhesive member, or may be bonded without using an adhesive or other adhesive member.

The button module 1 and the backlight module 2 of the third embodiment are installed On the bottom 31 of the base 3, the periphery of the button module 1 and the backlight module 2 is restrained by the side wall 32 to form a keyboard device that can emit light. The assembly is performed by first providing the reflective element 22 on the back surface 213 of the light guide plate 21, and then bonding the elastic piece 24 to the corresponding through hole 221 by the adhesive or other adhesive component at the position of the back surface 213 corresponding to the through hole 221. The back surface 213 of the light plate 21 is further disposed on the circuit board 12 together with the light guide plate 21, so that each of the elastic pieces 24 corresponds to a circuit switch 120, and the light source 23 electrically connected to the circuit board 12 is electrically connected in advance. Corresponding to the light incident surface 211 of the light guide plate 21; finally, the button portion 11 is attached to the light guide plate 21 such that the bottom portion of the button portion 11 faces the light exit surface 212.

When the user presses the button portion 11 and presses the key cap 111, the protrusion 112 under the key cap 111 will press the flexible light guide plate 21 and the reflective member 22, thereby deforming the elastic piece 24 and touching the circuit switch 120 to form an electrical path. To release a button signal; when the force applied to the keycap 111 is released, the compressed elastic piece 24 bounces the reflective member 22 and the light guide plate 21, so that the reflective member 22, the light guide plate 21 and the button portion 11 In return to the original position, the circuit switch 120 also utilizes its own elasticity while returning to its original shape to form an electrical disconnection.

The eighth embodiment shows a fourth embodiment of the novel illuminated keyboard having a structure substantially similar to that of the second embodiment described above; wherein the reflective member 22 is provided with a plurality of through holes corresponding to the position of the circuit switch 120 of the circuit substrate 12. 221, a spring piece 24 is disposed in the through hole 221 . The back surface of the light guide plate 21 is provided with a plurality of protrusions 214 corresponding to the elastic pieces 24. When the elastic piece 24 is disposed in the through hole 221, the adhesive or other adhesive element may be adhered between the fixed through hole 221 and the elastic piece 24; or the adhesive or other adhesive element is not disposed, and the elastic piece 24 is directly formed in the through hole 221. In the active state; or when the elastic piece 24 is disposed in the through hole 221, an adhesive member such as a tape is adhered to the reflective surface 222, and the elastic piece 24 is adhered and fixed to the reflective member 22. The light-emitting surface 212 of the light guide plate 21 and the lower surface of the button portion 111 may be bonded to each other by using an adhesive or other adhesive member, or may be bonded without using an adhesive or other adhesive member.

The button module 1 and the backlight module 2 of the fourth embodiment are installed On the bottom 31 of the base 3, the periphery of the button module 1 and the backlight module 2 is restrained by the side wall 32 to form a keyboard device that can emit light. The assembly is performed by first providing the reflective element 22 on the back surface 213 of the light guide plate 21, and then inserting a resilient piece 24 into each of the through holes 221 of the reflective element 22, and then combining the completed reflective element 22 and the light guide plate 21. The elastic piece 24 is disposed on the circuit board 12 so that each of the elastic pieces 24 corresponds to a circuit switch 120. The light source 23 electrically connected to the circuit board 12 in advance corresponds to the light incident surface 211 of the light guide plate 21; The portion 11 is mounted on the light guide plate 21 such that the bottom portion of the button portion 11 faces the light exit surface 212.

The ninth embodiment shows a fifth embodiment of the present illuminating keyboard, which has a structure substantially similar to that of the foregoing second embodiment; wherein the back surface of the reflecting member 22 is provided with a plurality of shrapnel corresponding to the position of the circuit switch 120 of the circuit substrate 12. 24; the combination of the elastic piece 24 and the reflective element 22, the elastic piece 24 can be directly adhered to the back surface of the reflective element 22 by an adhesive or other adhesive element. The reflective element 22 can be a diaphragm having at least one side that is a reflective surface 222 that can reflect light. The lower surface of the button portion 11 is provided with a plurality of protrusions 112 corresponding to the positions of the elastic pieces 24. The back surface 213 of the light guide plate 21 and the reflective surface 222 of the reflective member 22 may be bonded to each other using an adhesive or other adhesive member, or may be bonded without using an adhesive or other adhesive member.

The button module 1 and the backlight module 2 of the fifth embodiment are mounted on the bottom 31 of the base 3, and the periphery of the button module 1 and the backlight module 2 are restricted by the side wall 32 to form a light-emitting device. Keyboard device. The circuit board 12 is first disposed on the bottom portion 31, and then the reflective member 22 on which the elastic member 24 is disposed is disposed on the circuit substrate 12, so that the respective elastic pieces 24 respectively correspond to a circuit switch 120, and then the light guide plate 21 is disposed. The reflective element 22 is disposed such that the reflective surface 222 faces the back surface 213 of the light guide plate 21, and the light source 23 electrically connected to the circuit board 12 corresponds to the light incident surface 211 of the light guide plate 21; finally, the button portion 11 is mounted on the light guide surface 11 On the light plate 21, the lower surface of the button portion 11 is directed toward the light exit surface 212.

The above is only a preferred embodiment for explaining the present invention, and is not intended to impose any form limitation on the present invention, so that all are in the same Any modifications or changes made in the spirit should still be included in the scope of this new type of protection.

1‧‧‧ button module

11‧‧‧Keys

110‧‧‧Key diaphragm

111‧‧‧Key Cap

112‧‧‧ protrusion

12‧‧‧ circuit board

120‧‧‧ membrane switch

2‧‧‧Backlight module

21‧‧‧Light guide

211‧‧‧Into the glossy surface

212‧‧‧Glossy surface

213‧‧‧ back

215‧‧‧through holes

22‧‧‧reflecting elements

221‧‧‧through hole

222‧‧‧reflecting surface

23‧‧‧Light source

24‧‧‧Shrap

3‧‧‧Base

31‧‧‧ bottom

32‧‧‧ side wall

Claims (8)

A keyboard includes: a button module comprising a light transmissive button portion and a circuit substrate having a plurality of circuit switches; a backlight module comprising a light guide plate, a reflective member and at least one light source, the light guide plate Having at least one light-incident surface, a light-emitting surface, and a back surface opposite to the light-emitting surface, light emitted by the light source is projected from the light-incident surface into the light guide plate, and the backlight module is disposed on the button of the button module The light emitting surface faces the button portion between the portion and the circuit board, and the reflective element faces the back surface of the light guide plate. The keyboard of claim 1, wherein the light source is electrically connected to the circuit substrate, and light is projected from the side of the light guide plate into the light guide plate. The keyboard of the first aspect of the invention, wherein the light guide plate and the reflective element are respectively provided with a through hole and a through hole corresponding to the position of the circuit switch, and the corresponding through hole and the through hole are provided with a spring piece, A plurality of protrusions corresponding to the elastic pieces are provided on the back surface of the button portion. The keyboard of claim 1, wherein the reflective element is provided with a through hole corresponding to the position of the circuit switch, the through hole is provided with a spring piece, and the back side of the button portion is provided with a plurality of corresponding positions of the spring piece. The protrusion. The keyboard of claim 1, wherein the reflective element is provided with a through hole corresponding to a position of the circuit switch, the through hole is provided with a spring piece, and the back surface of the light guide plate is provided with a protrusion corresponding to the position of the spring piece. unit. The keyboard of claim 1, wherein the reflective element is connected to a plurality of bullets corresponding to the circuit switch on one side of the circuit substrate. a sheet, the back surface of the light guide plate is provided with a protrusion corresponding to the position of the spring piece. The keyboard of claim 1, wherein the reflective element is provided with a through hole corresponding to a position of the circuit switch, the through hole is provided with a spring piece, and the elastic piece is connected to a back surface of the light guide plate, the button The back of the part is provided with a plurality of protrusions corresponding to the position of the shrapnel. The keyboard of claim 1, wherein the reflective element is connected to a plurality of elastic pieces corresponding to the circuit switch on a side of the circuit board, and the back side of the button part is provided with a plurality of corresponding positions of the spring pieces. Highlights.