High anti-interference key cover plate with reasonable structure

Abstract

The utility model discloses a high anti-interference key cover plate with a reasonable structure, which comprises a cover plate body, a black ink layer, a light-transmitting ink layer, a black shading ink layer, a silver paste layer, carbon paste and a light guide plate, and is characterized in that the black ink layer is arranged on the lower surface of the cover plate body and is provided with at least one key hollow area; the light-transmitting ink layers are arranged at the key hollow-out areas, and the number and the positions of the light-transmitting ink layers correspond to the number and the positions of the key hollow-out areas; the black shading ink layer is arranged on the lower surface of the black ink layer, and the black shading ink layer avoids all the key hollow areas; the silver paste layer is arranged below the light-transmitting ink layer, the silver paste layer comprises an RX signal pattern, a TX signal pattern and a GND wire, and the GND wire surrounds the RX signal pattern and the TX signal pattern.

Description

Technical Field

[0001] The utility model relates to the technical field of touch keys, and more specifically to a key cover plate with reasonable structure and high anti-interference performance. Background Art

[0002] Traditional key cover plates usually use FPC, glass sensor or key film under the cover plate. This structure leads to high product cost and is not conducive to improving product competitiveness. Therefore, in order to reduce product costs, some manufacturers set key touch function patterns and GND surrounding the key touch function patterns under the cover plate, and use carbon paste to connect the whole machine ejector pin through the self-capacitance principle to connect the circuit signal to realize the touch function. Although this structure can realize the touch function at a lower cost, it is found after testing that the self-capacitance key cover plate has weak anti-interference ability and cannot work normally in some environments with strong interference. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to design a key cover plate with reasonable structure and strong anti-interference performance.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the utility model provides a key cover with reasonable structure and high anti-interference, which includes a cover body, a black ink layer, a light-transmitting ink layer, a black light-shielding ink layer, a silver paste layer, a carbon paste and a light guide plate, wherein the black ink layer is arranged on the lower surface of the cover body, and the black ink layer is provided with at least one key hollow area; the light-transmitting ink layer is arranged at the key hollow area, and the number and position of the light-transmitting ink layer correspond to the number and position of the key hollow area; the black light-shielding ink layer is arranged on the lower surface of the black ink layer, and the black light-shielding ink layer is provided on the lower surface of the black ink layer. The ink layer avoids all the hollow areas of the keys; the silver paste layer is arranged below the light-transmitting ink layer, the silver paste layer includes an RX signal pattern, a TX signal pattern and a GND trace, and the GND trace surrounds the RX signal pattern and the TX signal pattern; the carbon paste is arranged below the silver paste layer and corresponds to the positions of the electrodes of the TX signal pattern, the electrodes of the GND trace and the RX signal pattern and is electrically connected thereto; the light guide plate is arranged above the RX signal pattern, the TX signal pattern and the GND trace by means of double-sided adhesive, and the double-sided adhesive avoids the RX signal pattern.

[0006] As a preferred implementation of the key cover plate with reasonable structure and high anti-interference performance provided by the utility model, the cover plate body is made of transparent glass.

[0007] As a preferred implementation of the key cover plate with reasonable structure and high anti-interference performance provided by the utility model, the cover plate body is tempered glass.

[0008] As a preferred implementation of the key cover plate with reasonable structure and high anti-interference performance provided by the utility model, the RX signal pattern avoids the key hollow area.

[0009] As a preferred implementation of the key cover plate with reasonable structure and high anti-interference performance provided by the utility model, an LED lamp is arranged on one side of the light guide plate.

[0010] As a preferred implementation of the rationally structured and highly anti-interference key cover provided by the utility model, the number of the LED lights is 1 or 2.

[0011] As a preferred implementation of the rationally structured high-interference-resistant key cover provided by the utility model, there are two light guide plates, which are respectively arranged on the left and right sides of the display area.

[0012] As a preferred implementation of the key cover plate with reasonable structure and high anti-interference performance provided by the utility model, the material of the light-transmitting ink layer is white light-transmitting ink or semi-transmitting black ink.

[0013] As a preferred implementation of the rationally structured high-interference-resistant key cover provided by the utility model, the shape of the key hollow area is the shape of Arabic numerals and the shape of control icons.

[0014] As a preferred implementation of the key cover plate with reasonable structure and high anti-interference performance provided by the utility model, a display hollow area is provided on the black ink layer and the black light-shielding ink layer.

[0015] The utility model has the following beneficial effects:

[0016] Since the silver paste layer includes the RX signal pattern, the TX signal pattern and the GND routing, the RX signal pattern and the TX signal pattern form a capacitor, which uses the mutual capacitance principle to realize the touch function and has stronger anti-interference ability. In addition, a light guide plate is used under the silver paste layer to guide light. Only one or two LED lights are needed to provide light source for all buttons, which makes the structural layout more reasonable, thereby improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a stacking structure of a key cover plate with a reasonable structure and high anti-interference performance provided by the utility model.

[0019] Figure 2 for Figure 1 Magnified view of point A in .

[0020] Figure 3 for Figure 1 Exploded view of the upper part of the .

[0021] Figure 4 for Figure 1 Exploded view of the lower half of the .

[0022] Description of Figure Numbers:

[0023] Cover plate body 1; black ink layer 2; light-transmitting ink layer 3; black light-shielding ink layer 4; silver paste layer 5; carbon paste 6; light guide plate 7; key hollow area 21; RX signal pattern 51; TX signal pattern 52; GND wiring 53; double-sided adhesive 8; display hollow area 22. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] The utility model provides a key cover plate with reasonable structure and high anti-interference, which comprises a cover plate body, a black ink layer, a light-transmitting ink layer, a black light-shielding ink layer, a silver paste layer, a carbon paste and a light guide plate, wherein the black ink layer is arranged on the lower surface of the cover plate body, and the black ink layer is provided with at least one key hollow area; the light-transmitting ink layer is arranged at the key hollow area, and the number and position of the light-transmitting ink layer correspond to the number and position of the key hollow areas; the black light-shielding ink layer is arranged on the lower surface of the black ink layer, and the black light-shielding ink layer avoids All the hollow areas of the keys; the silver paste layer is arranged below the light-transmitting ink layer, the silver paste layer includes an RX signal pattern, a TX signal pattern and a GND trace, and the GND trace surrounds the RX signal pattern and the TX signal pattern; the carbon paste is arranged below the silver paste layer and corresponds to the positions of the electrodes of the TX signal pattern, the electrodes of the GND trace and the RX signal pattern and is electrically connected thereto; the light guide plate is arranged above the RX signal pattern, the TX signal pattern and the GND trace by means of double-sided adhesive, and the double-sided adhesive avoids the RX signal pattern.

[0028] Since the silver paste layer includes the RX signal pattern, the TX signal pattern and the GND routing, the RX signal pattern and the TX signal pattern form a capacitor, which uses the mutual capacitance principle to realize the touch function and has stronger anti-interference ability. In addition, a light guide plate is used under the silver paste layer to guide light. Only one or two LED lights are needed to provide light source for all buttons, which makes the structural layout more reasonable, thereby improving the competitiveness of the product.

[0029] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0030] See also Figures 1 to 4, a key cover with reasonable structure and high anti-interference provided by the utility model comprises a cover body 1, a black ink layer 2, a translucent ink layer 3, a black light-shielding ink layer 4, a silver paste layer 5, a carbon paste 6 and a light guide plate 7, wherein the black ink layer 2 is arranged on the lower surface of the cover body 1, and the black ink layer 2 is provided with at least one key hollow area 21. In the present embodiment, there are six key hollow areas 21, and the six key hollow areas 21 are respectively arranged on both sides of the visible area; the translucent ink layer 3 is arranged at the key hollow area 21, and the number and position of the translucent ink layer 3 correspond to the number and position of the key hollow areas 21, that is, in the present embodiment, the number of the translucent ink layer 3 is also six; the black light-shielding ink layer 4 is arranged on the lower surface of the black ink layer 2, and the black light-shielding ink layer 4 avoids all key hollow areas 21; the silver paste layer 5 is provided Placed below the light-transmitting ink layer 3, the silver paste layer 5 includes an RX signal pattern 51, a TX signal pattern 52 and a GND trace 53, the GND trace 53 surrounds the RX signal pattern 51 and the TX signal pattern 52, and the RX signal pattern 51 and the TX signal pattern 52 form mutual capacitance; the carbon paste 6 is arranged below the silver paste layer 5, and the carbon paste 6 corresponds to the positions of the electrodes of the TX signal pattern 52, the electrodes of the GND trace 53 and the RX signal pattern 51 and is electrically connected to them. In this embodiment, there are 6 RX signal patterns 51, 1 electrode of the TX signal pattern 52, 1 electrode of the GND trace 53, and 8 carbon pastes 6 are arranged; the light guide plate 7 is arranged above the RX signal pattern 51, the TX signal pattern 52 and the GND trace 53 by means of double-sided adhesive 8, and the double-sided adhesive 8 avoids the RX signal pattern 51. Since the silver paste layer 5 includes the RX signal pattern 51, the TX signal pattern 52 and the GND trace 53, the RX signal pattern 51 and the TX signal pattern 52 form a capacitor, which uses the mutual capacitance principle to realize the touch function and has stronger anti-interference ability. In addition, a light guide plate 7 is used under the silver paste layer 5 to guide light. Only one or two LED lamps are needed to provide light source for all buttons, which makes the structural layout more reasonable, thereby improving the competitiveness of the product.

[0031] Furthermore, the cover body 1 is made of transparent glass so that light can pass through the cover body 1 . More preferably, the cover body 1 is made of tempered glass to improve the strength of the cover body 1 .

[0032] Furthermore, the RX signal pattern 51 avoids the key hollow area 21 , so that the light can pass through the RX signal pattern 51 and emit from the cover body 1 .

[0033] See also Figures 1 to 4 As a further optimization scheme of Example 1, in this embodiment, an LED lamp is provided on one side of the light guide plate 7, and the number of LED lamps only needs to be 1 or 2, which can save the cost of LED lamps as well as the cost of wiring and operation. Of course, if the structure permits, multiple LED lamps can also be provided to increase the brightness of the buttons.

[0034] Furthermore, there are two light guide plates 7, and the two light guide plates 7 are respectively arranged on the left and right sides of the display area.

[0035] Furthermore, the material of the light-transmitting ink layer 3 is white light-transmitting ink or semi-transmitting black ink.

[0036] Furthermore, the shape of the key hollow area 21 is the shape of Arabic numerals and the shape of a control icon.

[0037] Furthermore, a display hollow area 22 is provided on the black ink layer 2 and the black light-shielding ink layer 4 so that the display hollow area 22 can provide a display function.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A key cover with reasonable structure and high anti-interference performance, characterized in that: It includes a cover body, a black ink layer, a light-transmitting ink layer, a black light-shielding ink layer, a silver paste layer, a carbon paste and a light guide plate, wherein the black ink layer is arranged on the lower surface of the cover body, and the black ink layer is provided with at least one key hollow area; the light-transmitting ink layer is arranged at the key hollow area, and the number and position of the light-transmitting ink layer correspond to the number and position of the key hollow areas; The black shading ink layer is arranged on the lower surface of the black ink layer, and the black shading ink layer avoids all the key hollow areas; the silver paste layer is arranged below the light-transmitting ink layer, and the silver paste layer includes an RX signal pattern, a TX signal pattern and a GND trace, and the GND trace surrounds the RX signal pattern and the TX signal pattern; the carbon paste is arranged below the silver paste layer and corresponds to the positions of the electrodes of the TX signal pattern, the electrodes of the GND trace and the RX signal pattern and is electrically connected thereto; the light guide plate is arranged above the RX signal pattern, the TX signal pattern and the GND trace by means of double-sided adhesive, and the double-sided adhesive avoids the RX signal pattern.

2. The key cover with reasonable structure and high anti-interference performance according to claim 1 is characterized in that: The cover plate body is made of transparent glass.

3. The key cover with reasonable structure and high anti-interference performance according to claim 1 is characterized in that: The cover plate body is made of tempered glass.

4. The key cover with reasonable structure and high anti-interference performance according to claim 1 is characterized in that: The RX signal pattern avoids the key hollow area.

5. The key cover with reasonable structure and high anti-interference performance according to claim 1 is characterized in that: An LED lamp is arranged on one side of the light guide plate.

6. The key cover with reasonable structure and high anti-interference performance according to claim 5 is characterized in that: The number of the LED lights is 1 or 2.

7. The key cover with reasonable structure and high anti-interference performance according to claim 1 is characterized in that: There are two light guide plates, which are arranged on the left and right sides of the display area respectively.

8. The key cover with reasonable structure and high anti-interference performance according to claim 1 is characterized in that: The material of the light-transmitting ink layer is white light-transmitting ink or semi-transmitting black ink.

9. The key cover with reasonable structure and high anti-interference performance according to claim 1, characterized in that: The shape of the key hollow area is the shape of Arabic numerals and the shape of control icons.

10. The key cover with reasonable structure and high anti-interference performance according to claim 1, characterized in that: A display hollow area is arranged on the black ink layer and the black light-shielding ink layer.

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