Multi-layer membrane switch with high sensitivity

Abstract

The utility model relates to the technical field of membrane switches, and discloses a high-sensitivity multilayer membrane switch which comprises a circuit layer assembly, a surface layer assembly is arranged on the upper portion of the circuit layer assembly, and a protective film is arranged on the upper portion of the surface layer assembly. The upper portion of the light reflecting layer is arranged on the lower portion of the light guide layer, the upper portion of the light guide layer is arranged on the lower portion of the panel, and the LED lamp beads are arranged in the light guide layer. According to the multi-layer membrane switch with high sensitivity, the characters and the identifiers at the keys are shielded and protected through the high-transmittance wear-resistant sheet, the situation that the characters and the identifiers at the keys become blurred due to long-time use is prevented, only the characters and the identifiers at the keys of the panel are light-transmitting, and the rest of the keys are light-tight, so that the high-sensitivity multi-layer membrane switch is convenient to use. The light emitted by the LED lamp beads is reflected by the reflective layer and then penetrates through the keys of the panel, so that characters and marks at the keys are light-transmitting and high-brightness, and a user can clearly see the keys in a dark environment and can conveniently use the keys in the dark environment.

Description

Technical Field

[0001] This utility model relates to the field of membrane switch technology, and in particular to a multilayer membrane switch with high sensitivity. Background Technology

[0002] A membrane switch is an integrated operating system combining button functionality, indicating elements, and an instrument panel. It consists of four parts: a panel, an upper circuit, an insulating layer, and a lower circuit. When the membrane switch is pressed, the contacts in the upper circuit deform downwards, making contact with the plates in the lower circuit to conduct electricity. When the finger is released, the contacts in the upper circuit rebound, breaking the circuit and triggering a signal. Membrane switches have a robust structure, an attractive appearance, and excellent sealing. They are moisture-proof and have a long service life. They are widely used in electronic communications, electronic measurement instruments, industrial control, medical equipment, the automotive industry, smart toys, and home appliances.

[0003] After prolonged use, the text and markings on the buttons of current membrane switches wear off severely, especially in dimly lit environments, making it difficult for users to distinguish the text and markings and hindering their use. Utility Model Content

[0004] The main objective of this invention is to provide a highly sensitive multilayer membrane switch that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a multilayer membrane switch with high sensitivity, comprising a circuit layer assembly, a surface layer assembly disposed on the upper part of the circuit layer assembly, and a protective film disposed on the upper part of the surface layer assembly;

[0006] The surface assembly includes a reflective layer, a light guide layer, a panel, and LED beads. The upper part of the reflective layer is disposed at the lower part of the light guide layer, the upper part of the light guide layer is disposed at the lower part of the panel, the LED beads are disposed inside the light guide layer, and the protective film is disposed at the upper part of the panel.

[0007] Preferably, a plurality of high-transparency wear-resistant sheets are disposed between the panel and the protective film, and each high-transparency wear-resistant sheet corresponds to a button.

[0008] Preferably, a heat dissipation copper sheet is provided on the upper part of the light guide layer, the heat dissipation copper sheet is offset from the button, and the end of the heat dissipation copper sheet away from the surface layer component is folded onto the upper part of the protective film.

[0009] Preferably, the circuit layer assembly includes a lower circuit layer, an isolation layer, and an upper circuit layer, with the lower part of the isolation layer disposed above the lower circuit layer and the lower part of the upper circuit layer disposed above the isolation layer.

[0010] Preferably, the lower circuit layer and the reflective layer are provided with an anti-static mesh, which is connected to the ground wire via a conductor.

[0011] Preferably, adhesive is provided on the lower part of the lower circuit layer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The text and markings on the buttons are shielded and protected by a high-transparency, wear-resistant sheet to prevent them from becoming blurry after prolonged use. Only the text and markings on the buttons are translucent, while the rest of the panel is opaque. Therefore, the light emitted by the LED beads is reflected by the reflective layer and penetrates the buttons, making the text and markings on the buttons bright and clear. This allows users to clearly see the buttons in dim environments, facilitating their use in low-light conditions. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a highly sensitive multilayer membrane switch according to the present invention.

[0015] In the diagram: 1. Circuit layer assembly; 101. Lower circuit layer; 102. Isolation layer; 103. Upper circuit layer; 2. Surface layer assembly; 201. Reflective layer; 202. Light guide layer; 203. Panel; 204. Heat dissipation copper sheet; 205. High-transparency wear-resistant sheet; 3. Protective film. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1 As shown, a highly sensitive multilayer membrane switch includes a circuit layer assembly 1, a surface layer assembly 2 on top of the circuit layer assembly 1, and a protective film 3 on top of the surface layer assembly 2. A high-transparency, wear-resistant sheet 205 shields and protects the text and markings at the buttons, preventing them from becoming blurred after prolonged use. Only the text and markings at the buttons are translucent on the panel 203; the rest is opaque. Therefore, the light emitted by the LED beads is reflected by the reflective layer 201 and penetrates the buttons on the panel 203, making the text and markings at the buttons highly visible and allowing users to clearly see the buttons in dim environments, facilitating use in low-light conditions.

[0018] The surface component 2 includes a reflective layer 201, a light guide layer 202, a panel 203, and LED beads. The upper part of the reflective layer 201 is located at the lower part of the light guide layer 202, and the upper part of the light guide layer 202 is located at the lower part of the panel 203. The LED beads are located inside the light guide layer 202, and the protective film 3 is located on the upper part of the panel 203. Only the text and markings at the buttons on the panel 203 are translucent, while the rest are opaque. Therefore, the light emitted by the LED beads is reflected by the reflective layer 201 and penetrates the buttons on the panel 203, making the text and markings at the buttons highly translucent and bright. This allows users to clearly see the buttons in dim environments, making it convenient for users to use the device in low-light conditions.

[0019] Multiple high-transparency wear-resistant sheets 205 are provided between the panel 203 and the protective film 3. Each high-transparency wear-resistant sheet 205 corresponds to a button. The high-transparency wear-resistant sheet 205 covers and protects the text and markings on the buttons, preventing them from becoming blurry after long-term use, thus facilitating long-term use by the user.

[0020] A heat dissipation copper sheet 204 is provided on the upper part of the light guide layer 202. The heat dissipation copper sheet 204 is offset from the button. The end of the heat dissipation copper sheet 204 away from the surface component 2 is folded onto the upper part of the protective film 3. Heat is conducted through the heat dissipation copper sheet 204, so that the heat generated by the LED can be dissipated in time, thereby extending the service life of the LED.

[0021] The circuit layer assembly 1 includes a lower circuit layer 101, an isolation layer 102, and an upper circuit layer 103. The lower part of the isolation layer 102 is disposed above the lower circuit layer 101, and the lower part of the upper circuit layer 103 is disposed above the isolation layer 102. When the membrane switch is pressed, the contacts of the upper circuit layer 103 deform downward and make contact with the electrode plate of the lower circuit layer 101 to conduct electricity. When the finger is released, the contacts of the upper circuit layer 103 rebound back, the circuit is broken, and the circuit triggers a signal.

[0022] The lower circuit layer 101 and the reflective layer 201 are provided with anti-static mesh. The anti-static mesh is connected to the ground wire through a wire, and static electricity is discharged through the anti-static mesh to prevent static electricity from damaging the membrane switch.

[0023] Adhesive is provided at the bottom of the lower circuit layer 101 to facilitate the installation of membrane switches.

[0024] Working principle:

[0025] The high-transparency wear-resistant sheet 205 shields and protects the text and markings on the buttons, preventing them from becoming blurry after prolonged use. Only the text and markings on the buttons on the panel 203 are translucent, while the rest are opaque. Therefore, the light emitted by the LED beads is reflected by the reflective layer 201 and penetrates the buttons on the panel 203, making the text and markings on the buttons highly translucent and bright. This allows users to clearly see the buttons in dim environments, facilitating their use in low-light conditions.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A highly sensitive multilayer membrane switch, comprising a circuit layer assembly (1), characterized in that: The circuit layer assembly (1) is provided with a surface layer assembly (2) on its upper part, and a protective film (3) is provided on the upper part of the surface layer assembly (2); The surface assembly (2) includes a reflective layer (201), a light guide layer (202), a panel (203), and LED beads. The upper part of the reflective layer (201) is disposed at the lower part of the light guide layer (202), the upper part of the light guide layer (202) is disposed at the lower part of the panel (203), the LED beads are disposed inside the light guide layer (202), and the protective film (3) is disposed at the upper part of the panel (203).

2. The highly sensitive multilayer membrane switch according to claim 1, characterized in that: Multiple high-transparency wear-resistant sheets (205) are provided between the panel (203) and the protective film (3), and each high-transparency wear-resistant sheet (205) corresponds to a button.

3. The highly sensitive multilayer membrane switch according to claim 1, characterized in that: A heat dissipation copper sheet (204) is provided on the upper part of the light guide layer (202). The heat dissipation copper sheet (204) is offset from the button, and the end of the heat dissipation copper sheet (204) away from the surface layer assembly (2) is folded onto the upper part of the protective film (3).

4. A high-sensitivity multilayer membrane switch according to claim 1, characterized in that: The circuit layer assembly (1) includes a lower circuit layer (101), an isolation layer (102) and an upper circuit layer (103). The lower part of the isolation layer (102) is disposed above the lower circuit layer (101), and the lower part of the upper circuit layer (103) is disposed above the isolation layer (102).

5. A highly sensitive multilayer membrane switch according to claim 4, characterized in that: The lower circuit layer (101) and the reflective layer (201) are provided with anti-static mesh, which is connected to the ground wire through a conductor.

6. A high-sensitivity multilayer membrane switch according to claim 4, characterized in that: Adhesive is provided on the lower part of the lower circuit layer (101).

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