Large-size integrated multifunctional touch switch

Abstract

The utility model provides a large-size integrated multifunctional touch switch, and relates to the field of touch switches, the large-size integrated multifunctional touch switch comprises a panel, a circuit board and a base, the surface of the panel is provided with a plurality of character areas through laser etching, the panel is internally provided with a plurality of contact sensors corresponding to the plurality of character areas, and the base is provided with a light emitting source, a light emitting diode (LED) light source and a light emitting diode (LED) light source, the plurality of sensors are arranged and correspond to the plurality of contact type sensors; the light guide sleeve covers the single light emitting source and corresponds to the contact type sensor; and the shading cotton is annular, is arranged between the light guide sleeve and the panel, and is propped against the inner side of the panel by the light guide sleeve. According to the backlight touch switch, the light rays emitted by the light emitting source are gathered through the light guide sleeve, the backlight brightness uniformity can be guaranteed to a certain degree, the light guide sleeve presses the shading cotton after being installed, the situation that the light rays in the light guide sleeve escape to influence the backlight effect of the adjacent character areas can be effectively avoided, and the problems of light leakage and light crosstalk of the backlight touch switch can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of touch switches, and in particular to a large-volume integrated multifunctional touch switch. Background Art

[0002] The multifunctional touch switches currently on the market usually include panel components, circuit boards and bases, etc. A contact sensor is provided inside the panel components, and characters are laser engraved on the surface of the panel. After the components are assembled, different switch control functions can be realized by touching different key characters.

[0003] As customers' requirements for user interface design continue to change and improve, the structural design of touch switches needs to be adjusted accordingly. For example, touch switches need to be equipped with a backlight function, which generally uses LED as the light source. However, backlight touch switches currently generally have uneven backlight brightness, and backlight leakage and cross-lighting between adjacent touch areas occur, affecting the user experience. Utility Model Content

[0004] In order to improve the problems of poor backlight brightness uniformity and easy light leakage of a backlight touch switch, the present application provides a large-volume integrated multifunctional touch switch.

[0005] The present application provides a large-volume integrated multifunctional touch switch adopts the following technical solution:

[0006] A large-volume integrated multifunctional touch switch comprises a panel, a circuit board and a base. The panel surface is laser-engraved with a plurality of character areas. The panel is provided with a plurality of contact sensors corresponding to the plurality of character areas. The base is provided with:

[0007] A plurality of light sources are provided and correspond to the plurality of contact sensors;

[0008] A light guide sleeve, which is covered on a single light source and corresponds to the contact sensor;

[0009] The light-shielding cotton is ring-shaped, arranged between the light-guiding sleeve and the panel and pressed against the inner side of the panel by the light-guiding sleeve.

[0010] Furthermore, the light guide sleeve is made of light-proof material.

[0011] Furthermore, the inner wall of the light guide sleeve is provided with a reflective surface.

[0012] Furthermore, a diffuser is provided between the light guide sleeve and the panel.

[0013] Furthermore, the distance between the character area and the light source is greater than the radius of the circumscribed circle of the character area.

[0014] Furthermore, the panel is made of brown PC material, a black spray paint layer is provided on the outer surface of the panel, and the character area is laser engraved on the black spray paint layer.

[0015] Furthermore, the sensing distance of the contact sensor is 0-3.5 mm, and the thickness of the panel is not greater than 3 mm.

[0016] Furthermore, a plurality of screw columns are provided on one side of the panel close to the circuit board, the base is fixed to the inner side of the panel by screws screwed into the screw columns, and the inner side of the panel has a step for positioning the light guide sleeve.

[0017] Furthermore, a decorative strip is connected to the periphery of the panel, and a plurality of handles are integrally formed on the length direction of the decorative strip. The panel is provided with a plurality of mounting holes adapted to be engaged with the plurality of handles.

[0018] Furthermore, the handle includes a vertical section fixedly connected to the decorative strip and a horizontal section integrally formed with the vertical section, and a side of the horizontal section close to the decorative strip is designed to be wedge-shaped.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. The light guide gathers the light from the light source, which can have a certain enhancement effect. The reflective surface of the inner wall of the light guide can play a good reflective role, reflecting the light from all angles of the light source upward, which can play the role of light uniformity and reduce light loss to ensure the uniformity of backlight brightness;

[0021] 2. After the light guide sleeve is installed, the light-shielding cotton is pressed tightly, which can effectively prevent the light in the light guide sleeve from escaping and affecting the backlight effect of the adjacent character area, and can improve the light leakage and cross-light problems of the backlight touch switch;

[0022] 3. With the combined use of light guide sleeve, light shielding cotton and diffuser, the backlight quality of the touch switch of the present application can be guaranteed, and there is no light leakage or cross-light phenomenon, and the backlight brightness uniformity can be made greater than 75%;

[0023] 4. By controlling the distance between the light source and the character area to be greater than 1.73 times the radius of the circumscribed circle of the character area, the characters or patterns in the character area can always fall within the optimal light-emitting range of the LED light source, thereby significantly improving the uniformity of the backlight brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is an exploded diagram of the overall structure of the embodiment of the present application;

[0026] Figure 2 is a schematic cross-sectional structural diagram of an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the overall structure of a touch sensor according to an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of an embodiment of the present application when the backlight is not lit;

[0029] Figure 5 is a schematic diagram of an embodiment of the present application after the backlight is turned on;

[0030] Figure 6 is a schematic diagram of the structure of the panel and the decorative strip of an embodiment of the present application;

[0031] Figure 7 It is a cross-sectional schematic diagram of the assembled panel and decorative strip of the embodiment of the present application.

[0032] Reference numerals:

[0033] 1. Panel; 11. Screw column; 12. Step; 13. Mounting hole;

[0034] 21. Circuit board; 211. Light source; 22. Base;

[0035] 3. Character area;

[0036] 4. Contact sensor;

[0037] 51. light guide sleeve; 511. wing piece; 52. light-shielding cotton; 53. diffuser;

[0038] 6. Decorative strip; 61. Handle; 611. Vertical section; 612. Horizontal section. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Reference Figure 1 , Figure 2 and Figure 3 The embodiment of the present application discloses a large-volume integrated multifunctional touch switch, which includes a panel 1, a circuit board 21 and a base 22. The outer surface of the panel 1 is laser-engraved with multiple character areas 3, and the panel 1 is provided with multiple touch sensors 4 corresponding to the multiple character areas 3. The touch sensors 4 are specifically touch capacitive sensors corresponding to different functional modules, and are bonded to the inner side of the panel 1 corresponding to the character areas 3 by optical glue.

[0041] The base 22 is provided with:

[0042] A plurality of light sources 211 are provided and correspond one to one with the plurality of contact sensors 4, and are specifically LED lights or other light sources capable of emitting visible light;

[0043] A light guide sleeve 51 is disposed on the single light source 211 and corresponds to the touch sensor 4;

[0044] The shading cotton 52 is in the shape of a ring coaxial with the light guide sleeve 51, and is disposed between the light guide sleeve 51 and the panel 1 and pressed against the inner side of the panel 1 by the light guide sleeve 51. The shading cotton 52 is bonded to the side of the touch sensor 4 facing away from the panel 1 by optical glue, and its inner diameter is adapted to the inner diameter of the light guide sleeve 51.

[0045] The specific arrangement is that the base 22 is installed on the inner side of the panel 1 , the circuit board 21 is installed on the base 22 , the light source 211 is installed on the circuit board 21 , and the light guide sleeve 51 is pressed between the circuit board 21 and the panel 1 .

[0046] After such arrangement, the base 22 can cover the circuit board 21 and other related components, and can play a good role in fixing and protecting; the light guide sleeve 51 gathers the light emitted by the light source 211, which can not only play a certain improvement effect and ensure the uniformity of the backlight brightness, but also avoid light leakage between two adjacent character areas 3; and after the light guide sleeve 51 is installed, the shading cotton 52 is pressed tightly, which can effectively prevent the light in the light guide sleeve 51 from escaping and affecting the backlight effect of the adjacent character area 3, thereby effectively improving the poor backlight brightness uniformity of the backlight touch switch and the problems of light leakage and light crosstalk.

[0047] In this way, when using the touch switch of the present application, the operator's finger approaches the touch sensor 4, which begins to transfer the electric field generated in the touch acquisition phase from the free space to the ground, thereby causing the capacitance of the touch sensor 4 to change. The touch chip on the circuit board 21 can accurately identify and read the capacitance change, thereby making a corresponding response to achieve the corresponding function.

[0048] Further, see Figure 1 and Figure 2 In order to further improve the brightness uniformity of the backlight of the character area 3, the light guide sleeve 51 is made of an opaque material, specifically, it is set to porcelain white; and a reflective surface is provided on the inner wall of the light guide sleeve 51, which is formed by polishing the inner wall of the light guide sleeve 51; and a diffuser 53 is provided between the light guide sleeve 51 and the panel 1, and the diffuser 53 is specifically provided between the shading cotton 52 and the contact sensor 4.

[0049] In this way, part of the visible light emitted by the light source 211 is directly irradiated upward to illuminate the character area 3; the other part is transmitted upward with the help of the reflective surface of the inner wall of the light guide sleeve 51, and can also illuminate the character area 3. This can achieve the effect of even light distribution and reduce light loss, and can also ensure the uniformity of light transmission in the character area 3. The diffuser 53 is made of white light-transmitting material, which can make the light diffusely emitted after passing through the diffuser 53, so that the human eye cannot see the extremely bright LED light source 211. Therefore, with the combined use of the light guide sleeve 51, the light-shielding cotton 52, and the diffuser 53, the backlight quality of the touch switch of the present application can be guaranteed, and there is no light leakage or cross-light phenomenon, and the backlight brightness uniformity can be made greater than 75%.

[0050] In addition, considering that the maximum light-emitting angle of a general LED light source 211 is 120° and the optimal light-emitting angle is 60°, in order to further improve the uniformity of the backlight brightness of the touch switch of the present application, the distance between the character area 3 and the light source 211 is set to be greater than the radius of the circumscribed circle of the character area 3, specifically greater than 1.73 times the radius of the circumscribed circle of the character area 3, where the radius of the circumscribed circle of the character area 3 refers to the radius of the smallest circumscribed circle of the character in the character area 3.

[0051] Therefore, when the character area 3 is close to the light source 211 and the font or pattern of the character area 3 is larger, and the character area 3 is outside the 60° range of the optimal light-emitting angle of the LED light source 211, the reflective surface of the inner wall of the light guide sleeve 51 can play a good reflective role, reflecting the light emitted from various angles of the light source 211 and propagating upward, which can play a role in even light and reducing light loss.

[0052] Moreover, in order to achieve the integrated effect of the character area 3 and the panel 1 without backlight, the panel 1 is made of brown PC material, and the outer surface of the panel 1 is provided with a black spray paint layer, specifically piano black paint, and the character area 3 is laser engraved on the black spray paint layer. At the same time, the sensing distance of the contact sensor 4 is 0 to 3.5 mm, and the thickness of the panel 1 is not more than 3 mm.

[0053] In this way, since the panel 1 is selected to be a transparent brown color similar to the color of the black spray paint layer, after the character area 3 is laser engraved on the black spray paint layer, the selected panel 1 substrate color is similar to piano black, so the effect of hiding the characters can be achieved visually, and the effect is shown in the figure below. Figure 4 When the touch switch of the present application is powered on and in an activated state, the light source 211 emits light, the backlight is turned on, and the corresponding character area 3 appears, and the effect is as follows Figure 5 Furthermore, when the light source 211 is set to a colored LED light, when the corresponding key is operated, the light color of the light source 211 can be controlled to change, so that the character area 3 can show different colors.

[0054] Finally, to facilitate the installation of the light guide sleeve 51, refer to Figure 1 and Figure 2 , the panel 1 is provided with a plurality of screw columns 11 on one side close to the circuit board 21, the base 22 is fixed to the inner side of the panel 1 by screws screwed into the screw columns 11, the inner side of the panel 1 is provided with a step 12 for positioning the light guide sleeve 51, the outer peripheral side of the light guide sleeve 51 is provided with a wing 511 which fits with the step 12, and the light guide sleeve 51 has at least two wings 511, so as to stabilize the light guide sleeve 51 and prevent the light guide sleeve 51 from rotating or deviating. Therefore, when the base 22 is screwed and fixed to the panel 1, the light guide sleeve 51 is also clamped between the base 22 and the panel 1, and by means of the fitting effect of the wing 511 and the step 12, and the elastic pressing effect of the light-shielding cotton 52, the shaking phenomenon of the light guide sleeve 51 can be effectively reduced, and the stability of the light guide sleeve 51 is greatly improved.

[0055] In order to facilitate the reliable connection between the touch switch of the present application and the device, refer to Figure 6 and Figure 7 A decorative strip 6 is connected to the periphery of the panel 1, and a plurality of handles 61 are integrally formed in the length direction of the decorative strip 6. A plurality of mounting holes 13 that are engaged with the plurality of handles 61 are provided on the panel 1; the handle 61 includes a vertical section 611 fixed to the decorative strip 6 and a horizontal section 612 integrally formed with the vertical section 611, and a side of the horizontal section 612 close to the decorative strip 6 is set to be wedge-shaped. Specifically, the mounting hole 13 is a long hole and its length is greater than that of the horizontal section 612; the distance between one end of the horizontal section 612 close to the vertical section 611 and the panel 1 is less than the thickness of the hole wall of the mounting hole 13 of the panel 1 at that location.

[0056] In this way, when the panel 1 is used to assemble the decorative strip 6, the multiple handles 61 on the decorative strip 6 can be aligned with the multiple mounting holes 13 on the panel 1, and then the handle 61 can be inserted into the mounting hole 13, so that the horizontal section 612 of the handle 61 passes through the mounting hole 13, and then the decorative strip 6 is pushed to move in the direction in which the horizontal section 612 extends, so that the panel 1 can be clamped between the horizontal section 612 and the decorative strip 6 by means of the wedge-shaped surface on the horizontal section 612, so as to realize the convenient installation of the decorative strip 6 on the panel 1, and then the decorative strip 6 is locked and limited by screws. In addition, during the process of assembling the decorative strip 6, the horizontal section 612 and the panel 1 are gradually clamped, and the multiple handles 61 work together to correct the decorative strip 6 at the same time, so as to prevent the thin and long decorative strip 6 from being deformed and warped.

[0057] The implementation principle of a large-volume integrated multifunctional touch switch in the embodiment of the present application is as follows:

[0058] The light guide sleeve 51 gathers the light emitted by the light source 211, which can not only play a certain improvement effect and ensure the uniformity of the backlight brightness, but also avoid light leakage between two adjacent character areas 3. After the light guide sleeve 51 is installed, the light-shielding cotton 52 is pressed tightly, which can effectively prevent the light in the light guide sleeve 51 from escaping and affecting the backlight effect of the adjacent character area 3, thereby effectively improving the poor backlight brightness uniformity of the backlight touch switch and the problems of light leakage and light crosstalk.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-volume integrated multifunctional touch switch, comprising a panel, a circuit board and a base, wherein the panel surface is laser-engraved with a plurality of character areas, and the panel is provided with a plurality of contact sensors corresponding to the plurality of character areas, characterized in that: The base is provided with: A plurality of light sources are provided and correspond to the plurality of contact sensors; A light guide sleeve, which is covered on a single light source and corresponds to the contact sensor; The light-shielding cotton is ring-shaped, arranged between the light-guiding sleeve and the panel and pressed against the inner side of the panel by the light-guiding sleeve.

2. A large-volume integrated multifunctional touch switch according to claim 1, characterized in that: The light guide sleeve is made of light-proof material.

3. A large-volume integrated multifunctional touch switch according to claim 1, characterized in that: The inner wall of the light guide sleeve is provided with a reflective surface.

4. The large-volume integrated multifunctional touch switch according to claim 1, characterized in that: A light diffuser is arranged between the light guide sleeve and the panel.

5. The large-volume integrated multifunctional touch switch according to claim 1, characterized in that: The distance between the character area and the light source is greater than the radius of the circumscribed circle of the character area.

6. A large-volume integrated multifunctional touch switch according to claim 1, characterized in that: The panel is made of brown PC material, a black spray paint layer is provided on the outer surface of the panel, and the character area is laser engraved on the black spray paint layer.

7. The large-volume integrated multifunctional touch switch according to claim 1, characterized in that: The sensing distance of the contact sensor is 0-3.5 mm, and the thickness of the panel is not more than 3 mm.

8. The large-volume integrated multifunctional touch switch according to claim 1, characterized in that: A plurality of screw columns are arranged on one side of the panel close to the circuit board. The base is fixed to the inner side of the panel by screws screwed into the screw columns. The inner side of the panel has a step for positioning the light guide sleeve.

9. The large-volume integrated multifunctional touch switch according to claim 1, characterized in that: A decorative strip is connected to the periphery of the panel, and a plurality of handles are integrally formed on the decorative strip in the length direction. The panel is provided with a plurality of mounting holes adapted to be engaged with the plurality of handles.

10. A large-volume integrated multifunctional touch switch according to claim 9, characterized in that: The handle comprises a vertical section fixedly connected to the decorative strip and a horizontal section integrally formed with the vertical section, and a side of the horizontal section close to the decorative strip is set in a wedge shape.

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