Cover plate with membrane switch

Abstract

The utility model particularly relates to a cover plate with a membrane switch, which comprises a cover plate body, the front surface of the cover plate body is provided with a light-transmitting key area, the back surface of the cover plate body is provided with a PET (Polyethylene Terephthalate) base material, a light equalizing film and a tea color film are arranged between the back surface of the cover plate body and the front surface of the PET base material, and the back surface of the PET base material is provided with a conducting layer. A protective film is arranged at the upper end of the back face of the PET base material. The light uniformizing film and the tea color film are combined for use, and when light emitted by the LED lamp passes through the light uniformizing film and the tea color film, the light uniformizing degree and the color display effect are improved, so that the impression effect is improved.

Description

Technical Field

[0001] The utility model specifically relates to a cover plate with a membrane switch. Background Art

[0002] A membrane switch is a device that uses a plurality of touch portions located on the inner surfaces of two opposing thin films to contact each other after being squeezed by an external force, so that the circuit is turned on, thereby achieving the desired switch function to generate a signal. Multiple sets of membrane switches can be combined and connected through a circuit to form an input device. The membrane switch is generally provided with a lead-out terminal. The membrane switch is installed on the indicator graphic panel. The membrane switch also has a lead-out terminal. The surface of the lead-out terminal is connected to the back of the indicator graphic panel with a double-sided tape. However, current customers are in urgent need of improving the uniformity and color of the membrane switch. The above-mentioned membrane switch cannot be implemented and needs further improvement. Summary of the invention

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a cover with a membrane switch, which can provide improved uniform lightness and color display effects, thereby improving the viewing effect.

[0004] According to the utility model, a cover plate with a membrane switch includes a cover plate body, a light-transmitting key area is provided on the front surface of the cover plate body, a PET substrate is provided on the back surface of the cover plate body, a light-homogenizing film and a tea-colored film are provided between the back surface of the cover plate body and the front surface of the PET substrate, a conductive layer is provided on the back surface of the PET substrate, and a protective film is provided at the upper end of the back surface of the PET substrate.

[0005] Specifically, the cover body is further provided with a display area, and the display area is located above or below the light-transmitting button area.

[0006] Specifically, the conductive layer is connected with a single-sided adhesive and a light-shielding adhesive in sequence.

[0007] Specifically, the back side of the cover body is connected to the brown colored film via a second double-sided adhesive.

[0008] Specifically, the back surface of the light-homogenizing film is connected to the front surface of the PET substrate via a first double-sided adhesive tape.

[0009] Specifically, a protective film is provided on the rear surface of the PET substrate.

[0010] Specifically, the front and rear surfaces of the PET substrate are provided with foam, and the foam on the rear surface of the PET substrate is located at the outer surface of the protective film.

[0011] Specifically, a reinforcing sheet is provided on the upper front surface of the PET substrate.

[0012] Specifically, a conductive surface is provided on the upper rear surface of the PET substrate.

[0013] Specifically, a cable tie is provided on the side of the cover body.

[0014] The beneficial effect of the utility model is that the structure uses a light-homogenizing film and a tea-colored film in combination, and when the light emitted by the LED lamp passes through the light-homogenizing film and the tea-colored film, the uniform light intensity and color display effect are improved, thereby improving the viewing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the exploded structure of the membrane switch and the cover plate of the utility model.

[0018] The markings in the attached drawings are as follows:

[0019] PET substrate 1; first double-sided adhesive tape 2; conductive layer 3; single-sided adhesive tape 4; light-shielding adhesive tape 5; light-distributing film 6, brown-colored film 7; second double-sided adhesive tape 8; cover body 9, protective film 10, foam 11, conductive surface 12, reinforcing sheet 13, light-transmitting key area 14, display area 15, and cable ribbon 16. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, 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 having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] Reference below Figure 1 and Figure 2 A cover with a membrane switch according to an embodiment of the utility model is described, including a cover body 9, a front surface of the cover body 9 is provided with a light-transmitting key area 14, a back surface of the cover body 9 is provided with a PET substrate 1, the PET substrate 1 is installed with an LED lamp, a light-homogenizing film 6 and a tea-colored film 7 are also provided between the back surface of the cover body 9 and the front surface of the PET substrate 1, a conductive layer 3 is provided on the back surface of the PET substrate 1, and a protective film 10 is provided at the upper end of the back surface of the PET substrate 1.

[0022] This structure is provided with a computer board on the back of the PET substrate 1, and the computer board is installed with an LED lamp. The LED lamp corresponds to the light-distributing film 6. The light-distributing film 6 and the tea-colored film 7 are used together. The light emitted by the LED lamp when it is powered on improves the uniformity of light and the color display effect when the light passes through the light-distributing film 6 and the tea-colored film 7, thereby improving the viewing effect.

[0023] Even light film 6 Even light film is also called LED even light film. Even light film 6 is made of roll film with thickness ranging from 0.025~0.25MM. The overall light source is more uniform, soft and full. Brown color film 7 prevents moisture, water vapor penetration, oxidation corrosion and transparency.

[0024] The cover body 9 of this structure is further provided with a display area 15, which is located above or below the light-transmitting key area 14. The display area 15 corresponds to a digital display, and the light-distributing film 6 and the tea-colored film 7 correspond to the light-transmitting key area 14.

[0025] The conductive layer 3 of the present structure is connected with a single-sided adhesive 4 and a light-shielding adhesive 5 in sequence. The light-shielding adhesive 5 is a kind of glue that can block light, and is usually composed of a coating and a substrate. Its main function is to prevent light from passing through the glue and ensure that the contact surface has a certain light-shielding property. The light-shielding adhesive also has the functions of sealing, fixing and insulating. The single-sided adhesive 4 is used to fix the light-shielding adhesive 5 on the surface of the conductive layer 3.

[0026] The back of the cover body 9 of this structure is connected to the brown-colored film 7 via the second double-sided adhesive tape 8. The back of the homogenizing film 6 of this structure is connected to the front surface of the PET substrate 1 via the first double-sided adhesive tape 2. The second double-sided adhesive tape 8 and the first double-sided adhesive tape 2 play a fixing role.

[0027] The rear surface of the PET substrate 1 of this structure is provided with a protective film 10. The protective film 10 plays a role in protecting the PET substrate 1; the front and rear surfaces of the PET substrate 1 of this structure are provided with foam 11, and the foam 11 on the rear surface of the PET substrate 1 is located on the outer surface of the protective film 10. The upper front surface of the PET substrate 1 of this structure is provided with a reinforcing sheet 13. The reinforcing sheet 13 strengthens the overall rigidity.

[0028] The upper rear surface of the PET substrate 1 of this structure is provided with a conductive surface 12. The conductive surface 12 is used to conduct electrical energy. The side of the cover body 9 of this structure is provided with a wiring belt 16. One end of the wiring belt 16 is connected to the conductive surface 12. The LED lamp is also welded to the conductive surface 12 to supply power to the LED lamp.

[0029] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cover plate with a membrane switch, comprising a cover plate body (9), a light-transmitting keypad area (14) being provided on the front surface of the cover plate body (9), and a PET substrate (1) being provided on the back surface of the cover plate body (9), characterized in that: A light-homogenizing film (6) and a tea-colored film (7) are provided between the back surface of the cover plate body (9) and the front surface of the PET substrate (1), a conductive layer (3) is provided on the back surface of the PET substrate (1), and a protective film (10) is provided at the upper end of the back surface of the PET substrate (1).

2. A cover plate with a membrane switch according to claim 1, characterized in that: The cover plate body (9) is further provided with a display area (15), and the display area (15) is located above or below the light-transmitting key area (14).

3. The cover plate with a membrane switch according to claim 1, characterized in that: The conductive layer (3) is sequentially connected with a single-sided adhesive (4) and a light-shielding adhesive (5).

4. The cover plate with a membrane switch according to claim 1, characterized in that: The back surface of the cover plate body (9) is connected to the tea-colored film (7) via a second double-sided adhesive tape (8).

5. The cover plate with a membrane switch according to claim 1, characterized in that: The back surface of the light-homogenizing film (6) and the front surface of the PET substrate (1) are connected via a first double-sided adhesive (2).

6. The cover plate with a membrane switch according to claim 1, characterized in that: The rear surface of the PET substrate (1) is provided with a protective film (10).

7. The cover plate with a membrane switch according to claim 1, characterized in that: The front and rear surfaces of the PET substrate (1) are provided with foam (11), and the foam (11) on the rear surface of the PET substrate (1) is located on the outer surface of the protective film (10).

8. The cover plate with a membrane switch according to claim 1, characterized in that: A reinforcing sheet (13) is provided on the upper front surface of the PET substrate (1).

9. The cover plate with a membrane switch according to claim 1, characterized in that: The upper rear surface of the PET substrate (1) is provided with a conductive surface (12).

10. The cover plate with a membrane switch according to claim 1, characterized in that: A cable arrangement belt (16) is provided on the side of the cover plate body (9).

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