Key cover plate capable of preventing ink from discoloring and falling off

Abstract

The utility model discloses a key cover plate for preventing ink from discoloring and falling, which comprises a cover plate body, an anti-UV (ultraviolet) film, main body black ink, light-transmitting ink, black shading ink, a silver paste layer, carbon paste and a diffusion film, and is characterized in that the anti-UV film is adhered to the lower surface of the cover plate body through optical cement; the main body black ink is arranged on the lower surface of the anti-UV film, and at least one key clearance part is arranged on the main body black ink; the light-transmitting ink is arranged at the key clearance parts, and the position and the quantity of the light-transmitting ink correspond to the position and the quantity of the key clearance parts; the black shading ink is arranged on the lower surface of the main body black ink and avoids the key avoiding part; the silver paste layer is arranged below the black shading ink, and the silver paste layer comprises a key touch function pattern located below the key clearance part and a GND wire surrounding the key touch function pattern.

Description

Technical Field

[0001] The utility model relates to the technical field of a touch key cover plate, and more specifically to a key cover plate capable of preventing ink from changing color and falling off. Background Art

[0002] Some key covers have a silver paste layer printed under the ink layer to enable the touch key function on the cover. However, most electronic products need to be used outdoors. When used outdoors, the ink layer is prone to discoloration after being exposed to sunlight, resulting in abnormal display color of the key cover. In severe cases, the ink layer may fall off, and then the silver paste layer may fall off, causing the touch key function to be lost, reducing the user experience and product competitiveness. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to prevent the ink of the key cover from changing color and falling off.

[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 plate for preventing ink from changing color and falling off, which comprises a cover plate body, an anti-UV film, a main black ink, a light-transmitting ink, a black light-shielding ink, a silver paste layer, a carbon paste and a diffusion film, wherein the anti-UV film is adhered to the lower surface of the cover plate body by optical adhesive; the main black ink is arranged on the lower surface of the anti-UV film, and at least one key space-avoiding portion is arranged on the main black ink; the light-transmitting ink is arranged at the key space-avoiding portion, and the position and quantity of the light-transmitting ink correspond to the position and quantity of the key space-avoiding portion; the black light-shielding ink is arranged on the lower surface of the main black ink and avoids the key space-avoiding portion; the silver paste layer is arranged at the Below the black light-shielding ink, the silver paste layer includes a key touch function pattern located below the key avoidance portion and a GND trace surrounding the key touch function pattern, and the position and number of the key touch function pattern correspond to the position and number of the key avoidance portion; the carbon paste is arranged below the silver paste layer and corresponds to the electrode of the GND trace and the position of the key touch function pattern and is electrically connected thereto; the diffusion membrane is fixed to the lower surface of the silver paste layer by a black tape, and the position and number of the diffusion membrane correspond to the position and number of the key avoidance portion, the diffusion membrane avoids the carbon paste, the black tape avoids the key avoidance portion, and the black tape partially avoids the carbon paste and covers the silver paste layer.

[0006] As a preferred embodiment of the key cover plate for preventing ink from changing color and falling off provided by the utility model, the material of the light-transmitting ink is white light-transmitting ink or semi-transmitting black ink.

[0007] As a preferred implementation of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, the key touch function pattern avoids the key space avoidance portion.

[0008] As a preferred embodiment of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, the shape of the key avoiding portion is the shape of Arabic numerals and the shape of control icons.

[0009] As a preferred embodiment of the key cover plate for preventing ink from changing color and falling off provided by the utility model, a circular avoidance portion surrounding the key avoidance portion is arranged on the main black ink, and red ink is arranged on the avoidance portion.

[0010] As a preferred embodiment of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, an anti-fingerprint film is arranged on the upper surface of the cover plate.

[0011] As a preferred implementation of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, the thickness of the anti-fingerprint film is 1 μm to 10 μm.

[0012] As a preferred embodiment of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, the upper surface of the cover plate located in the non-visible area is provided with a surface treatment layer for improving the surface roughness.

[0013] As a preferred embodiment of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, a glue layer is provided on the lower surface of the anti-fingerprint film located in the non-visible area.

[0014] As a preferred implementation of the key cover plate for preventing ink from discoloring and falling off provided by the utility model, the thickness of the adhesive layer is 0.5 μm.

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

[0016] Since an anti-UV film is provided on the lower surface of the cover body, UV light can be prevented from entering the interior of the cover body when used outdoors, thereby preventing the ink layer inside the cover body from discoloring and falling off, and further preventing the silver paste layer from falling off and causing the loss of touch button function, thereby improving user experience and product competitiveness. 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 The utility model provides a schematic diagram of the stacking structure of a key cover plate for preventing ink from changing color and falling off.

[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] Figure 5 This is a schematic diagram of the structure of Example 2.

[0023] Description of Figure Numbers:

[0024] Cover plate body 1; anti-UV film 2; main black ink 3; light-transmitting ink 4; black light-shielding ink 5; silver paste layer 6; carbon paste 7; diffusion film 8; optical glue 9; key avoidance part 31; key touch function pattern 61; GND wiring 62; black tape 10; red ink 11; anti-fingerprint film 12; glue layer 13. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] The utility model provides a key cover plate for preventing ink from changing color and falling off, which comprises a cover plate body, an anti-UV film, a main black ink, a light-transmitting ink, a black light-shielding ink, a silver paste layer, a carbon paste and a diffusion film, wherein the anti-UV film is attached to the lower surface of the cover plate body by optical adhesive; the main black ink is arranged on the lower surface of the anti-UV film, and at least one key avoiding portion is arranged on the main black ink; the light-transmitting ink is arranged at the key avoiding portion, and the position and quantity of the light-transmitting ink correspond to the position and quantity of the key avoiding portion; the black light-shielding ink is arranged on the lower surface of the main black ink and avoids the key avoiding portion; the silver paste layer is arranged on the black light-shielding ink layer. The silver paste layer comprises a key touch function pattern located below the key avoidance portion and a GND trace surrounding the key touch function pattern, and the position and number of the key touch function pattern correspond to the position and number of the key avoidance portion; the carbon paste is arranged below the silver paste layer and corresponds to the position of the electrode of the GND trace and the key touch function pattern and is electrically connected thereto; the diffusion membrane is fixed to the lower surface of the silver paste layer by a black tape, and the position and number of the diffusion membrane correspond to the position and number of the key avoidance portion, the diffusion membrane avoids the carbon paste, the black tape avoids the key avoidance portion, and the black tape partially avoids the carbon paste and covers the silver paste layer.

[0029] Since an anti-UV film is provided on the lower surface of the cover body, UV light can be prevented from entering the interior of the cover body when used outdoors, thereby preventing the ink layer inside the cover body from discoloring and falling off, and further preventing the silver paste layer from falling off and causing the loss of touch button function, thereby improving user experience and product competitiveness.

[0030] 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.

[0031] See also Figures 1 to 4 , a key cover plate for preventing ink from changing color and falling off provided by the utility model, comprising a cover plate body 1, an anti-UV film 2, a main black ink 3, a light-transmitting ink 4, a black light-shielding ink 5, a silver paste layer 6, a carbon paste 7 and a diffusion film 8, the anti-UV film 2 is adhered to the lower surface of the cover plate body 1 by an optical adhesive 9; the main black ink 3 is arranged on the lower surface of the anti-UV film 2, and at least one key space-avoiding portion 31 is arranged on the main black ink 3. In this embodiment, there are ten key space-avoiding portions 31 and they are arranged around the display area; the light-transmitting ink 4 is arranged at the key space-avoiding portion 31, and the position and number of the light-transmitting ink 4 correspond to the position and number of the key space-avoiding portions 31, that is, there are also ten light-transmitting inks 4; the black light-shielding ink 5 is arranged on the lower surface of the main black ink 3 and avoids the key space-avoiding portion 31; the silver paste layer 6 is arranged below the black light-shielding ink 5, and the silver paste layer 6 includes a key touch function pattern 61 located below the key space-avoiding portion 31 and a key touch function pattern surrounding the key touch function pattern 61 The GND wiring 62 of the key touch function pattern 61, the position and number of the key touch function pattern 61 correspond to the position and number of the key avoidance portion 31, that is, there are ten key touch function patterns 61; the carbon paste 7 is arranged below the silver paste layer 6 and corresponds to the position of the electrode of the GND wiring 62 and the key touch function pattern 61 and is electrically connected to them. In this embodiment, there is one electrode of the GND wiring 62, and there are eleven carbon pastes 7, which respectively correspond to the positions of the electrode of the GND wiring 62 and the key touch function pattern 61; the diffusion film 8 is fixed to the lower surface of the silver paste layer 6 by the black tape 10, the position and number of the diffusion film 8 correspond to the position and number of the key avoidance portion 31, that is, there are ten diffusion films 8, the diffusion film 8 avoids the carbon paste 7, the black tape 10 avoids the key avoidance portion 31, and the black tape 10 partially avoids the carbon paste 7 and covers the silver paste layer 6, so that the carbon paste 7 is exposed and connected to the ejector pin of the whole machine and the black tape 10 can completely cover the silver paste layer 6. Since the anti-UV film 2 is provided on the lower surface of the cover body 1, UV light can be prevented from entering the cover body 1 when used outdoors, thereby preventing the ink layer inside the cover body 1 from discoloring and falling off, and further preventing the silver paste layer 6 from falling off and causing the touch button function to lose function, thereby improving the user experience and product competitiveness.

[0032] Furthermore, the material of the light-transmitting ink 4 is white light-transmitting ink 4 or semi-transmitting black ink.

[0033] Furthermore, the key touch function pattern 61 avoids the key avoiding portion 31 .

[0034] Furthermore, the key avoiding portion 31 has an appearance of Arabic numerals and a control icon.

[0035] Furthermore, a circular avoidance portion surrounding the key avoidance portion 31 is provided on the main black ink 3, and red ink 11 is provided on the avoidance portion to enrich the display effect.

[0036] See also Figure 5 As a further optimization scheme of Example 1, in this embodiment, an anti-fingerprint film 12 is provided on the upper surface of the cover body 1, so that users can avoid fingerprints remaining on the surface of the cover body 1 during use, thereby improving the aesthetics and enhancing the competitiveness of the product.

[0037] Furthermore, the anti-fingerprint film 12 has a thickness of 1 μm to 10 μm.

[0038] Furthermore, the upper surface of the cover body 1 in the non-visible area is provided with a surface treatment layer for improving the surface roughness, and the surface treatment layer is a frosted treatment layer or an etching treatment layer, and the lower surface of the anti-fingerprint film 12 in the non-visible area is provided with an adhesive layer 13, so that the anti-fingerprint film 12 can be more firmly attached to the upper surface of the cover body 1. More preferably, the thickness of the adhesive layer 13 is 0.5 μm.

[0039] 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.

[0040] 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 plate for preventing ink from discoloring and falling off, characterized in that: It includes: Cover plate body; An anti-UV film, which is adhered to the lower surface of the cover body by optical adhesive; A main body black ink, which is disposed on the lower surface of the anti-UV film, and at least one key avoidance portion is disposed on the main body black ink; Translucent ink, which is arranged at the key-avoiding portion, and the position and quantity of the translucent ink correspond to the position and quantity of the key-avoiding portion; Black light-shielding ink, which is disposed on the lower surface of the main black ink and avoids the key avoidance portion; A silver paste layer, which is disposed below the black light-shielding ink, the silver paste layer comprising a key touch function pattern located below the key gap portion and a GND trace surrounding the key touch function pattern, wherein the position and number of the key touch function pattern correspond to the position and number of the key gap portion; A carbon paste is disposed below the silver paste layer and corresponds to the position of the electrode of the GND wiring and the key touch function pattern and is electrically connected thereto; A diffusion film is fixed to the lower surface of the silver paste layer by a black tape, the position and number of the diffusion film correspond to the position and number of the key avoidance parts, the diffusion film avoids the carbon paste, the black tape avoids the key avoidance parts, and the black tape partially avoids the carbon paste and covers the silver paste layer.

2. The key cover plate for preventing ink from discoloring and falling off according to claim 1, characterized in that: The material of the light-transmitting ink is white light-transmitting ink or semi-transmitting black ink.

3. The key cover plate for preventing ink from discoloring and falling off according to claim 1, characterized in that: The key touch function pattern avoids the key avoiding portion.

4. The key cover plate for preventing ink from discoloring and falling off according to claim 1, characterized in that: The shape of the key avoiding portion is the shape of Arabic numerals and the shape of a control icon.

5. The key cover plate for preventing ink from discoloring and falling off according to claim 1, characterized in that: A circular avoidance portion surrounding the key avoidance portion is arranged on the main body black ink, and red ink is arranged on the avoidance portion.

6. The key cover plate for preventing ink from discoloring and falling off according to claim 1, characterized in that: An anti-fingerprint film is arranged on the upper surface of the cover plate.

7. The key cover plate for preventing ink from discoloring and falling off according to claim 6, characterized in that: The anti-fingerprint film has a thickness of 1 μm to 10 μm.

8. The key cover plate for preventing ink from discoloring and falling off according to claim 6, characterized in that: The upper surface of the cover plate located in the non-visible area is provided with a surface treatment layer for improving the surface roughness.

9. The key cover plate for preventing ink from discoloring and falling off according to claim 6, characterized in that: The lower surface of the anti-fingerprint film located in the non-visible area is provided with an adhesive layer.

10. The key cover plate for preventing ink from discoloring and falling off according to claim 9, characterized in that: The thickness of the adhesive layer is 0.5 μm.

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