Membrane switch capable of preventing blockage of exhaust hole

Abstract

The utility model provides a membrane switch with an anti-blocking vent hole, which comprises a panel layer, an upper circuit layer, a spacer adhesive layer, a conductive layer, a lower circuit layer and a bottom plate layer which are sequentially attached and connected from top to bottom, and a switch inner cavity is formed between the upper circuit layer and the conductive layer through the spacer adhesive layer. A plurality of exhaust holes communicated with the inner cavity of the switch are formed in the positions, corresponding to the inner cavity of the switch, of the spacer rubber layer, and an insulating supporting layer is arranged in the middle of each exhaust hole; the width of the insulating supporting layer is smaller than the inner diameter of the exhaust hole; and the thickness of the insulating support layer is equal to that of the spacer adhesive layer. The exhaust port can be prevented from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of membrane switch technology, specifically to a membrane switch with an anti-clogging vent. Background Technology

[0002] Chinese Patent Publication No. CN218299673U, published on January 13, 2023, discloses a membrane switch with an external venting structure. The switch includes an upper circuit, a wire key layer, a lower circuit, and a base adhesive layer. The entire membrane switch, from top to bottom, consists of the upper circuit, wire key layer, lower circuit, and base adhesive layer. The upper and lower circuits are bonded together via the wire key layer, and the base adhesive layer is attached to the back of the lower circuit. External venting components are also provided on the surfaces of the wire key layer, lower circuit, and base adhesive layer. This invention, by incorporating external venting components, allows the gas inside the membrane switch to communicate with the outside. During operation, the small holes, perforations, and large holes are interconnected, allowing the gas between the upper circuit, wire key layer, lower circuit, and base adhesive layer to communicate with the outside. Through structural improvements, external venting is achieved, preventing button sagging and jamming. In practical applications, the existing technology has the following drawback: once the venting component is blocked, gas cannot pass smoothly through the membrane switch cavity, requiring greater downward pressure on the pressing circuit. After pressing, the circuit's rebound speed slows down or even fails to rebound. Given this situation, improvements are urgently needed. Utility Model Content

[0003] To address the above problems, this utility model provides a membrane switch that can prevent the exhaust port from becoming blocked.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a membrane switch with anti-clogging vent holes, comprising, from top to bottom, a panel layer, an upper circuit layer, a spacer adhesive layer, a conductive layer, a lower circuit layer, and a base plate layer, which are sequentially bonded together. The spacer adhesive layer forms a switch cavity between the upper circuit layer and the conductive layer. The spacer adhesive layer has several vent holes corresponding to the switch cavity, communicating with the switch cavity. An insulating support layer is centrally located within each vent hole. The width of the insulating support layer is smaller than the inner diameter of the vent hole. The thickness of the insulating support layer is equal to the thickness of the spacer adhesive layer.

[0005] Preferably, the spacer adhesive layer is a pressure-sensitive double-sided adhesive layer.

[0006] Preferably, the panel layer is made of any one of PET, PI, and PC.

[0007] Preferably, the conductive layer is a carbon film layer.

[0008] Preferably, the base plate layer is configured as a double-sided adhesive layer or a 3M adhesive layer.

[0009] The beneficial effects of this utility model are: an insulating support layer is centrally located inside each exhaust hole. When the exhaust hole is blocked by the adhesive layer of the septum, the thickness of the insulating support layer is equal to the thickness of the adhesive layer of the septum, which can provide a supporting force to open up the upper circuit layer and the conductive layer, thereby achieving the technical effect of preventing the exhaust hole from being blocked. Attached Figure Description

[0010] Figure 1 This is a perspective view of the present invention from a top angle.

[0011] Figure 2 This is a side perspective view of the present invention.

[0012] Figure 3 This is a top view of the structure of each layer of this utility model.

[0013] The attached diagram is labeled as follows: panel layer 18, upper circuit layer 17, spacer adhesive layer 13, conductive layer 16, lower circuit layer 14, base plate layer 12, vent hole 10, insulating support layer 11, and switch cavity 15. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0015] Reference Figure 1-3 As shown: A membrane switch with vent blockage prevention includes, from top to bottom, a panel layer 18, an upper circuit layer 17, a spacer adhesive layer 13, a conductive layer 16, a lower circuit layer 14, and a base plate layer 12, which are sequentially bonded together. The upper circuit layer 17 is attached to the lower surface of the panel layer 18, the lower circuit layer 14 is attached to the upper surface of the base plate layer 12, the conductive layer 16 is attached to the upper surface of the lower circuit layer 14, and the spacer adhesive layer 13 is attached between the panel layer 18 and the base plate layer 12. The spacer adhesive layer 13 forms a switch cavity 15 between the upper circuit layer 17 and the conductive layer 16. Several vent holes 10 communicating with the switch cavity 15 are opened at positions corresponding to the spacer adhesive layer 13 and the switch cavity 15. An insulating support layer 11 is centrally disposed in each vent hole 10. The width of the insulating support layer 11 is smaller than the inner diameter of the vent hole 10, and the thickness of the insulating support layer 11 is equal to the thickness of the spacer adhesive layer 13.

[0016] In a preferred embodiment, the spacer adhesive layer 13 is a pressure-sensitive double-sided adhesive layer. The panel layer 18 is made of any one of PET, PI, or PC. The conductive layer 16 is a carbon film layer. The base plate layer 12 is a double-sided adhesive layer or a 3M adhesive layer.

[0017] In this embodiment, an insulating support layer is centrally located inside each vent hole. When the vent hole becomes blocked due to the adhesive layer of the spacer, the thickness of the insulating support layer is equal to the thickness of the spacer adhesive layer, which can provide a supporting force to open up the upper circuit layer and the conductive layer, thereby achieving the technical effect of preventing the vent hole from becoming blocked.

[0018] The above embodiments illustrate only one implementation of this utility model, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A membrane switch with an anti-clogging vent, comprising, from top to bottom, a panel layer (18), an upper circuit layer (17), a spacer adhesive layer (13), a conductive layer (16), a lower circuit layer (14), and a base plate layer (12), wherein the spacer adhesive layer (13) forms a switch cavity (15) between the upper circuit layer (17) and the conductive layer (16), characterized in that: The diaphragm adhesive layer (13) has several vent holes (10) that communicate with the switch cavity (15) at positions corresponding to the switch cavity (15). An insulating support layer (11) is centrally located in each vent hole (10). The width of the insulating support layer (11) is smaller than the inner diameter of the vent hole (10). The thickness of the insulating support layer (11) is equal to the thickness of the diaphragm adhesive layer (13).

2. A membrane switch for preventing vent blockage according to claim 1, characterized in that, The septum adhesive layer (13) is configured as a pressure-sensitive double-sided adhesive layer.

3. A membrane switch for preventing vent blockage according to claim 1, characterized in that, The panel layer (18) is set to any one of PET, PI, and PC.

4. A membrane switch for preventing vent blockage according to claim 1, characterized in that, The conductive layer (16) is configured as a carbon film layer.

5. A membrane switch for preventing vent blockage according to claim 1, characterized in that, The base plate layer (12) is configured as a double-sided adhesive layer or a 3M adhesive layer.

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