TWI464764B - Backlight key structure - Google Patents

Description

Pressure type backlight button structure

The invention relates to a button structure, in particular to a pressure type backlight button structure, which can increase the convenience and the identification of the button operation in a place where the light source is insufficient, and can simplify the design structure of the product, so that the weight can be reduced and cut costs.

At present, the design of the keyboard on the market is more and more diversified. When the keyboard is selected by the user, the keyboard should have the basic input function, and the visual effect of the keyboard is also valued by the user. Therefore, the introduction of a keyboard with a luminous effect, in addition to visually attracting the user's attention, enhances the user's chance of purchase, at night or in low light, the user may not be able to see the number indicated on the keyboard button and The text, which makes the work difficult, the keyboard with the luminous effect will improve the inconvenience of using the keyboard in the case of insufficient light.

However, a keyboard having a backlight button on the market generally requires a large-scale independent light guide plate or light guide plate to provide a light guiding function due to the conventional structure, which increases the excessive cost. At the same time, the keyboard of the general backlight button, the light guide plate or the light guide sheet is disposed under the thin film electrical signal layer, so that the light flux is easily reduced, and the light emitted from the button is insufficient, and the light emitting effect is not good.

The pressure type backlight button structure of the invention has the advantages of economy and practicability, and the light-emitting effect can be achieved without a separate large-scale light guide plate or light guide sheet, and the light guide plate or the light guide sheet is not disposed on the film electrical signal layer. Below, you can reduce the loss of light.

The present invention provides a pressure type backlight button structure, comprising a button panel, a cover portion, a light transmissive insulating layer, at least one light guiding structure, at least one light reflecting structure, at least one light emitting unit, a first conductive layer, A spacer layer and a second conductive layer may further include a bottom plate.

The button panel is located on the front surface of the transparent insulating layer, and the button panel has a plurality of button bodies. The button body has a pressing surface and four side wall surfaces, and the interior of each button body is closed by the pressing surface, the side wall surface and the insulating layer. Space, the accommodation space can be filled with gas or liquid. The cover part is covered on the button panel, and the cover part has a plurality of frame holes respectively passing through the plurality of button bodies, and the frame holes limit the four side wall faces of the button body. The front surface of the transparent insulating layer has a light guiding structure, and the back surface of the transparent insulating layer has a light reflecting structure, and the receiving hole on the transparent insulating layer penetrates the transparent insulating layer in a longitudinal direction. The light-emitting unit is installed in the accommodating hole, and the light emitted from the light-emitting unit passes through the light-transmissive insulating layer to reach the lower side of the button body, and then transmits the light to the button body through the light-guiding structure, and the light-reflecting structure is increased. The reflection of the light, so that the button body emits light to achieve the effect of illuminating.

The first conductive layer is located on the back surface of the transparent insulating layer, and the back surface of the first conductive layer has a plurality of first electrical contact portions, and the first electrical contact portion corresponds to the button body. The second conductive layer is located below the first conductive layer, the front surface of the second conductive layer has a plurality of second electrical contacts, and the second electrical contact corresponds to the first electrical contact. The separation layer is located between the first conductive layer and the second conductive layer. The separation layer has a plurality of through holes, and the first electrical contact portion transmits through the corresponding through holes to face the corresponding second electrical contacts.

When the button body is pressed by an external force, the pressure is transmitted to the light-transmitting insulating layer through the gas or liquid in the accommodating space, and the light-transmitting insulating layer pushes the first conductive layer downward, and the first conductive layer drives the first electric layer. Sexual contact The first electrical contact portion is abutted on the second electrical contact portion through the through hole of the partition layer, so that the first electrical contact portion is electrically connected to the second electrical contact portion.

In summary, the pressure type backlight button structure of the present invention allows the user to obtain a clear button function display for operation in any environment with insufficient illumination. Moreover, it can replace the function of the independent large-scale light guide plate or light guide plate of the general backlight button, thereby greatly improving the backlight brightness and cost saving of the product, thereby increasing the competitiveness of the product. Since the inside of the button body is filled with gas or liquid, the function of buffering and dispersing the pressure allows the user to avoid finger fatigue and increase the comfort during operation when the button is operated for a long time, and to reduce the sound generated during the collision. The effect of mute.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams and exploded views of the pressure type backlight button structure 1 of the present invention. The pressure type backlight button structure 1 of the present invention comprises a button panel 10, a cover portion 60, a light transmissive insulating layer 20, one or more light guiding structures 21 on the front surface of the transparent insulating layer 20, and more than one light transmitting insulation. The light reflecting structure 23 on the back side of the layer 20, one or more light emitting units 80, a first conductive layer 30, a separating layer 40, and a second conductive layer 50 may further include a bottom plate 70.

Please refer to FIG. 3, which is a cross-sectional view of the pressure type backlight button structure 1 of the present invention. The button panel 10 is located in the transparent insulating layer 20 The button body 10 has a plurality of button bodies 11 , and the button body 11 is integrally formed on the button panel 10 . The material of the button body 11 can be plastic, silicone, resin or other polymer materials, but the button body 11 The material is not limited. The button body 11 has a pressing surface 112, a plurality of side wall surfaces 113 and a plurality of abutting surfaces 114. The pressing surface 112 is located at the top end of the button body 11, and provides a function of contacting with an external force. The pressing surface 112 can be an upwardly convex curved surface. The downward curved surface or the horizontal plane is not limited, and the pressing surface 112 can be designed with letters or symbols for user identification.

The sidewall surface 113 is formed to extend from the peripheral edge of the pressing surface 112 to form a sidewall surface 113. The sidewall surface 113 may be deformed less easily than the insulating layer 20 and the first conductive layer 30. Furthermore, the sidewall surface 113 may be made of a harder or tougher material than the insulating layer 20 and the first conductive layer 30, or the sidewall surface 113 may be increased to make the sidewall surface 113 less susceptible to deformation. The condition that the side wall surface 113 is less likely to be deformed than the insulating layer 20 and the first conductive layer 30 is not limited to the above. Then, the abutting surface 114 is extended from the lower end of the side wall surface 113, and the button body 11 is tightly joined to the transparent insulating layer 20 through the abutting surface 114 to achieve the effect of fixing the button body 11 to the transparent insulating layer 20. Therefore, the key panel 10 is joined to the light-transmitting insulating layer 20 through the abutting surface 114. The material of the transparent insulating layer 20 may be a Mylar, a Polyethylene film, a Polypropylene film, a Polystyrene film or other polymer film.

The inside of the button body 11 is formed with a hollow accommodating space 111 formed by the pressing surface 112 of the button body 11 and the side wall surface 113 and the light-transmissive insulating layer 20 at the lower end. The accommodation space 111 can be Fill the appropriate amount of gas or liquid. The gas can be general atmosphere, inert gas or nitrogen. The liquid can be water, oil or polymer. However, the materials of gas and liquid are not limited, and the gas or liquid is fully sealed. In the space 111, when an external force is applied to the pressing surface 112, it functions as a buffering and dispersing pressure. Therefore, when an external force is applied to the pressing surface 112, the gas or liquid in the accommodating space 111 is subjected to pressure, and the pressure is transmitted to the periphery and the lower side of the accommodating space 111 by the action of the gas or the liquid. The sidewall surface 113 may be deformed in a manner that is less likely to be deformed than the insulating layer 20 and the first conductive layer 30, that is, the gas or liquid in the accommodating space 111 is restricted to expand around, but tends to move downward. So that most of the force will be transferred down to the insulating layer 20, and the insulating layer 20 and the first conductive layer 30 are deformed.

The pressure button structure 1 of the present invention includes a cover portion 60, the cover portion 60 is covered on the button panel 10, and the cover portion 60 has a plurality of frame holes 61, so that the button body 11 of the button panel 10 can be It is exposed to the outside of the cover portion 60 through the frame hole 61. Therefore, the inner wall of the frame hole 61 can restrict the deformation of the button body 11 to the periphery. More specifically, when the pressing surface 113 of the button body 11 receives an external force, the button body 11 will be deformed to the periphery and below, due to the frame. The inner wall of the hole 61 limits the four side wall surfaces 113 of the button body 11 to restrict the deformation of the button body 11 to the periphery, and since the inner wall of the frame hole 61 returns the force, the button body 11 tends to Deformation occurs below, so the pressure will be transferred down to the insulating layer 20. In addition, the pressure type button structure 1 may include a bottom plate 70 that is attached to the back surface of the second conductive layer 50 to function as a load. Wherein, the cover portion 60 combines the bottom plate 70 to form a casing having a function of protecting the internal structure.

The light-transmissive insulating layer 20 has one or more accommodating holes 22, and the accommodating holes 22 can be used to mount the light-emitting unit 80. However, the light emitting unit 80 may be disposed by being covered by the transparent insulating layer 20, or the light emitting unit 80 may be disposed in the first conductive layer 30, the separation layer 40 or the second conductive layer 50, and thus the light emitting unit 80 is located below the button panel 10, and its position is not limited. The light-emitting unit 80 can be electrically connected to the first conductive layer 30 or through other electrical connections to achieve the effect of light emission, and the light-emitting unit 80 can be a light-emitting diode or other light-emitting element. The light guiding structure 21 is disposed on the front surface of the transparent insulating layer 20, and the light reflecting structure 23 is disposed on the back surface of the transparent insulating layer 20. The light guiding structure 21 and the light reflecting structure 23 are all located below the corresponding button body 11 to provide Light guide and increase the ability to reflect light. The material of the light guiding structure 21 may be a light guiding film, a light guiding sheet, a light guiding plate, a light guiding strip, a light guiding ink or other light guiding material, and the material of the light reflecting structure 23 may be a reflective sheet, a mirror or a reflective coating. The materials of the light guiding structure 21 and the light reflecting structure 23 are not limited.

Referring to FIG. 4, after the light emitting unit 80 generates the light source, the light penetrates through the light transmitting insulating layer 20 laterally and reaches below the button body 11. At this time, the light passes through the light guiding structure 21, and converts the original horizontal light into a longitudinal light to be transmitted to the button body 11. For example, when the light reaches the lower side of the button body 11, the light can be turned into an upward direction through the light guiding film, or the light is transmitted through the matrix point of the light guiding ink to turn the light into an upward direction. Then, the light penetrates through the gas or liquid in the accommodating space 111, and then penetrates the surface of the button body 11 to diverge the light. Wherein, the light reflecting structure 23 disposed on the back surface of the transparent insulating layer 20 can fully reflect the light to increase The brightness of the light for a better radiance.

In addition, in order to effectively control the uniformity of the backlight and increase the brightness to achieve a better illuminating effect, the density of the light guiding structure 21 may be increased in a region where the light may be insufficient or where the brightness is required, for example, : The density of the light guiding structure 21 can be increased for a button having a longer length or a larger area, or for a button that needs to be particularly noticeable to produce a better illuminating effect. In addition, a light guiding material may be added to the material of the button body 11, that is, the button body 11 is mixed with the material of the button body 11 during the molding process, and is formed into the button body 11 to make the button body 11 contains a light guiding material to make the light emitted from the button body 11 more uniform.

In the modified embodiment of the present invention, as shown in FIG. 5, the light emitting unit 80 may be connected to the conductive structure 81. The conductive structure 81 may be a flexible circuit board or a conductor wire or the like. However, the material of the conductive structure 81 is not limited. In order to make the light emitting unit 80 be designed as an independent circuit. Referring to FIG. 6 , the light emitting unit 80 can be disposed in the transparent insulating layer 20 , and the light emitting unit 80 can form an independent circuit. Therefore, the light emitting unit 80 can also be electrically connected to the first conductive layer 30 . Referring to FIG. 7 , the light emitting unit 80 can also be disposed in the first conductive layer 30 , and then the light transmitting insulating layer 20 is disposed on the first conductive layer 30 , and the light emitted from the light emitting unit 80 can also pass through. The light-transmitting insulating layer 20 transmits light to the button body 11 via the light guiding structure 21, and diverges the light through the button body 11.

Referring to FIG. 3, the first conductive layer 30 may be a thin film circuit board, a flexible circuit board, a printed circuit board or other device having a conductive circuit signal. However, the device of the first conductive layer 30 is not limited. in In this embodiment, the first conductive layer 30 is a thin film circuit board having a film structure, and has a plurality of first electrical contact portions 31 on the back surface of the first conductive layer 30, wherein the first electrical contact portions 31 are respectively protruded. The first electrical contact portion 31 can be an electrically conductive conductor such as a metal conductor, graphite or a conductive polymer material. The material of an electrical contact portion 31 is not limited.

The second conductive layer 50 is located under the first conductive layer 30, and the second conductive layer 50 can be a thin film circuit board, a flexible circuit board, a printed circuit board or other device having a conductive circuit signal, but the device of the second conductive layer 50 There are no restrictions. In this embodiment, the second conductive layer 50 is a thin film circuit board having a film structure, and has a plurality of second electrical contact portions 51 on the front surface of the second conductive layer 50, and the second electrical contact portions 51 are located corresponding to each other. Below the first electrical contact portion 31, wherein the second electrical contact portions 51 are respectively protruded from the front surface of the second conductive layer 50, and the second electrical contact portion 51 may be a conductive conductive conductor such as a metal conductor. The graphite or the conductive polymer material, however, the material of the second electrical contact portion 51 is not limited.

A spacer layer 40 is disposed between the first conductive layer 30 and the second conductive layer 50. The material of the spacer layer 40 may be plastic, silicone, resin or other polymer materials. However, the material of the spacer layer 40 is not limited. The partition layer 40 has a plurality of through holes 41. The first electrical contact portions 31 pass through the corresponding through holes 41 to face the corresponding second electrical contact portions 51. Therefore, the upper and lower sides of the through holes 41 are respectively first. The electrical contact portion 31 and the second electrical contact portion 51, the through hole 41 is a hollow passage, and the first electrical contact portion 31 can be actuated inside the through hole 41 to make the first electrical contact portion 31 selectively abuts the second electrical contact portion 51.

Please refer to FIG. 8 , which is a cross-sectional view showing the external pressure of the pressure type backlight button structure 1 of the present invention when the button body 11 is pressed. The button body 11 can drive the first electrical contact portion 31 to abut against the second electrical contact portion 51 to electrically connect the first electrical contact portion 31 to the second electrical contact portion 51. In more detail, when the pressing surface 112 of the button body 11 is pressed by an external force, the housing space 111 inside the button body 11 is a closed space filled with gas or liquid, and the side wall surface 113 of the button body 11 is compared with the insulating layer. 20 and the first conductive layer 30 are not easily deformed, and the frame hole 61 of the cover portion 60 restricts the button body 11 from being unfolded to the periphery, so that the force is reversed, and the gas or liquid in the accommodating space 111 will be allowed to be The pressure is transmitted downward to the light-transmitting insulating layer 20. The light-transmissive insulating layer 20 is subjected to pressure and thus deformed, and the light-transmitting insulating layer 20 transmits the pressure downward to push the first conductive layer 30, so that the first conductive layer 30 is bent downward to drive the first electrical contact portion. 31 is actuated downward, because the first electrical contact portion 31 faces the second electrical contact portion 51 through the through hole 41, so that the first electrical contact portion 31 passes through the through hole 41 of the separation layer 40 to abut the second electric portion. The first electrical contact portion 31 is electrically connected to the second electrical contact portion 51 on the sexual contact portion 51, thereby achieving the effect of signal conduction.

Since the first conductive layer 30 and the second conductive layer 50 have a circuit layout, the first electrical contact portion 31 can be electrically connected through the circuit of the first conductive layer 30, and the second electrical contact portion 31 can be electrically connected. The electrical contact portion 51 is electrically connected through the circuit of the second conductive layer 50. Therefore, when the user wants to input a message, the pressing surface 112 of the button body 11 can be pressed, and the transparent insulating layer 20 is pressed through the gas or liquid in the accommodating space 111, thereby transmitting the pressure to the first conductive layer 30. , And the first conductive layer 30 is deformed. The first electrical contact portion 31 is abutted against the second electrical contact portion 51, so that the first electrical contact portion 31 and the second electrical contact portion 51 are connected to each other, and the user can input the message to be transmitted. Then, the user's message is transmitted through the conduction of the circuit.

The pressure type backlight button structure 1 of the invention can be composed of a desktop computer keyboard, a notebook computer keyboard, a computer dictionary keyboard, an e-book keyboard, a home telephone keyboard, a mobile phone keyboard, a radio intercom keyboard, a remote control keyboard, and the like. The keyboard for operation has a luminous effect, which allows the user to get a good display effect in the case of insufficient light. The overall pressure type backlight button structure 1 can be more than one button body 11. The pressure type backlight button structure 1 can be square, rectangular, rectangular, rhombic, polygonal or circular, etc., to match the intended use. It is also used as an electronic, electrical or digital product that requires a button, such as a general button keyboard or a button interface.

In summary, the present invention has the following advantages:

1. A light source is generated through the light emitting unit, and the light penetrates the light transmitting insulating layer and then transmits the light to the button body through the light guiding structure to generate a light emitting effect. Therefore, the user can obtain a clear button function display for operation in any environment with insufficient illumination.

2. The pressure type backlight button structure of the invention can replace the function of the independent large-scale light guide plate or the light guide sheet of the general backlight button, and can greatly improve the backlight brightness and cost of the product, thereby increasing the competitiveness of the product.

3. Since the inside of the button body is filled with gas or liquid, it has the function of buffering and dispersing pressure, so that the user can avoid when the button is operated for a long time. It avoids the fatigue of the fingers and increases the comfort during operation, and reduces the sound generated during the collision, which can be muted.

4. The pressure type backlight button structure greatly reduces the height of the original product, in order to reduce the weight and reduce the use of materials, which is environmentally friendly and portable. Moreover, since the button panel is first bonded to the transparent insulating layer and then bonded to the first conductive layer through the transparent insulating layer, if the button on the button panel is abnormal during the production process, the button panel can be directly replaced. In order to increase the yield of the product without replacing the part of the circuit signal device, there will be a cost advantage.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalents of the present invention and the equivalents of the drawings are all included in the present invention. Within the scope of protection, it is given to Chen Ming.

1‧‧‧pressure type backlight button structure

10‧‧‧Key panel

11‧‧‧Key body

111‧‧‧ accommodating space

112‧‧‧ pressing surface

113‧‧‧ side wall

114‧‧‧Abutment

20‧‧‧Transparent insulation

21‧‧‧Light guiding structure

22‧‧‧ accommodating holes

23‧‧‧Light reflection structure

30‧‧‧First conductive layer

31‧‧‧First electrical contact

40‧‧‧Separation layer

41‧‧‧through hole

50‧‧‧Second conductive layer

51‧‧‧Second electrical contact

60‧‧‧ Covering Department

61‧‧‧ hollow holes

70‧‧‧floor

80‧‧‧Lighting unit

81‧‧‧Electrical structure

1 is a schematic view showing the combination of a pressure type backlight button structure of the present invention.

2 is an exploded perspective view showing the structure of a pressure type backlight button of the present invention.

3 is a cross-sectional view showing the light-emitting unit of the pressure type backlight button structure of the present invention disposed in the accommodating hole.

4 is a cross-sectional view showing a light path of a pressure type backlight button structure of the present invention.

FIG. 5 is a diagram showing a light-emitting unit connection conductive structure of a pressure type backlight button structure of the present invention.

FIG. 6 shows a light-emitting unit of a pressure type backlight button structure of the present invention disposed in a light-transmitting insulating layer.

FIG. 7 is a cross-sectional view showing the light emitting unit of the pressure type backlight button structure of the present invention disposed in the first conductive layer.

Fig. 8 is a cross-sectional view showing the external force of the pressure type backlight button structure of the present invention when the button body is pressed.

1‧‧‧pressure type backlight button structure

10‧‧‧Key panel

11‧‧‧Key body

111‧‧‧ accommodating space

112‧‧‧ pressing surface

113‧‧‧ side wall

114‧‧‧Abutment

20‧‧‧Transparent insulation

21‧‧‧Light guiding structure

22‧‧‧ accommodating holes

23‧‧‧Light reflection structure

30‧‧‧First conductive layer

31‧‧‧First electrical contact

40‧‧‧Separation layer

41‧‧‧through hole

50‧‧‧Second conductive layer

51‧‧‧Second electrical contact

60‧‧‧ Covering Department

61‧‧‧ hollow holes

70‧‧‧floor

80‧‧‧Lighting unit

Claims (15)

A pressure type backlight button structure comprises: a light transmissive insulating layer; a button panel located on a front surface of the light transmissive insulating layer, the button panel having a plurality of button bodies, each button body having a pressing force in contact with an external force And a plurality of side walls extending downward from the periphery of the pressing surface, the pressing surface of each of the button bodies and the side wall surfaces and the transparent insulating layer are sealed to form an accommodating space, the accommodating space is filled with gas and liquid One of the cover portions is attached to the button panel, and the cover portion has a plurality of frame holes respectively passing through the button bodies, and each of the frame holes is respectively for each of the button bodies The first conductive layer is located on the back surface of the transparent insulating layer, and the back surface of the first conductive layer has a plurality of first electrical contacts respectively corresponding to the button bodies; at least one a light-emitting unit is disposed under the button panel, and the light generated by the light-emitting unit passes through the light-transmissive insulating layer laterally to reach below the button bodies; and a second conductive layer is located at the first Conductive The second conductive layer has a plurality of second electrical contacts respectively corresponding to the first electrical contacts, and a spacer layer located at the first conductive layer and the second conductive layer The partition layer has a plurality of through holes, each of the first electrical contacts passing through each of the corresponding through holes to face each of the corresponding second electrical contacts; wherein the side walls are respectively phase Compared with the light transmissive insulating layer and the first The conductive layer is less prone to deformation. The pressure-type backlight button structure of claim 1, wherein the light-transmissive insulating layer has at least one receiving hole, and the light-emitting unit is disposed in the receiving hole. The pressure type backlight button structure according to claim 1, wherein the light emitting unit is disposed in the light transmissive insulating layer. The pressure type backlight button structure of claim 1, wherein the light emitting unit is electrically connected to the first conductive layer. The pressure type backlight button structure of claim 1, wherein the light emitting unit is electrically connected to a conductive structure. The pressure type backlight button structure according to claim 1, wherein the light emitting unit is a light emitting diode. The pressure type backlight button structure of claim 1, wherein at least one light guiding structure is disposed on the front surface of the transparent insulating layer, and the light guiding structure corresponds to the button body. The pressure type backlight button structure according to claim 7, wherein the light guiding structure is one of a light guiding film, a light guiding sheet, a light guiding plate, a light guiding strip, a light guiding ink, and a light guiding material. The pressure type backlight button structure of claim 7, wherein at least one light reflecting structure is disposed on the back surface of the light transmitting insulating layer, and the light reflecting structure corresponds to the button body. The pressure type backlight button structure according to claim 9, wherein the light reflection structure is one of a reflector, a mirror and a reflective paint. The pressure type backlight button structure according to claim 9, wherein the light generated by the light emitting unit passes through the transparent insulating layer, and then The light guiding structure transmits the light to the button body, and the reflection of the light is increased through the light reflecting structure. The pressure type backlight button structure according to claim 1, wherein a light guiding material is added to a material of the button body. The pressure type backlight button structure of claim 1, wherein the button body can drive the first electrical contact portion to abut the second electrical contact portion to achieve the first electrical contact portion. The second electrical contact is connected sexually. The pressure type backlight button structure of claim 1, further comprising a bottom plate attached to the back surface of the second conductive layer. The pressure type backlight button structure of claim 14, wherein the cover portion combines the bottom plate to form a housing that protects the internal structure.