A membrane switch

Abstract

The utility model discloses a kind of membrane switches, including the panel layer, face glue layer, upper line layer, isolation layer, lower line layer and bottom glue layer arranged in order from top to bottom, panel layer is equipped with key, upper line layer is equipped with convex hull, convex hull is correspondingly arranged with key, upper line layer is equipped with connecting wire, the outer periphery of convex hull is equipped with multiple first conductive wire, each first conductive wire is electrically connected with connecting wire, the first conductive wire of each convex hull outer periphery is at least two, each first conductive wire is distributed in the outer periphery of corresponding convex hull. By distributing at least two first conductive wire in the outer periphery of convex hull, therefore, when the first conductive wire of one side appears fracture during stretch forming process, other conductive wire of other side can keep communication with connecting wire, thus, the communication of wire on convex hull can be kept all the time, that is, effectively prevent the phenomenon that key fails, ensure the normal use of membrane switch, ensure the yield of product.

Description

Technical Field

[0001] This utility model relates to a switch, and more particularly to a membrane switch. Background Technology

[0002] To achieve the tactile feedback required for membrane switches, a bulging process is used on the upper circuitry. However, during this bulging process, the conductive wires on the material surface are simultaneously subjected to pressure or stretching during the stretching and deformation of the material. Furthermore, due to potential misalignment during mold assembly and long-term use, the conductive wires are prone to breakage under pressure or stretching, leading to button malfunction and significantly impacting the overall quality and yield of the membrane switch. Utility Model Content

[0003] The purpose of this invention is to provide a membrane switch that can solve at least one of the above-mentioned problems.

[0004] According to one aspect of the present invention, a membrane switch is provided, comprising a panel layer, a top adhesive layer, an upper wire layer, an insulating layer, a lower wire layer, and a bottom adhesive layer arranged sequentially from top to bottom. The panel layer is provided with a raised key, and the upper wire layer is provided with a raised bulge, which is correspondingly arranged with the raised key. The upper wire layer is provided with a connecting wire, and the outer periphery of the raised bulge is provided with multiple first conductive wires, each of which is electrically connected to the connecting wire. Each raised bulge has at least two first conductive wires on its outer periphery, and each first conductive wire is evenly distributed on the outer periphery of the corresponding raised bulge.

[0005] The beneficial effects of this utility model are: by evenly distributing at least two first conductive lines around the outer periphery of the convex shroud, when the first conductive line on one side breaks during the stretching and forming process of the convex shroud, the other conductive lines on the other side can maintain communication with the connecting wires. Therefore, the connection of the wires on the convex shroud can always be maintained, which effectively prevents the convex key from malfunctioning, ensures the normal use of the membrane switch, and guarantees the product yield.

[0006] In some embodiments, a second conductive wire is provided on the outer periphery of each convex bulge. The second conductive wire is located on the outer periphery of the first conductive wire, and the first conductive wire on the outer side of each convex bulge is connected to the corresponding second conductive wire. The second conductive wire is arc-shaped and connected to the connecting wire. Thus, the second conductive wire facilitates the connection between the connecting wire and each of the first conductive wires.

[0007] In some embodiments, the convex hull is provided with a third conductive wire and a fourth conductive wire. The third conductive wire is circular, and the fourth conductive wire is located inside the third conductive wire, and there are multiple fourth conductive wires. Both ends of the fourth conductive wire are connected to the third conductive wire. Thus, the normal use of the convex hull can be achieved through the third and fourth conductive wires.

[0008] In some implementations, one end of the first conductive line is connected to the third conductive line, and the other end is connected to the second conductive line. This achieves the connection between the corresponding conductive lines on the convex hull and the connecting wires, enabling the normal operation of the button.

[0009] In some embodiments, the third conductive line is located at the bottom end of the convex hull. This facilitates the connection between the third conductive line and the first conductive line.

[0010] In some implementations, the panel layer has multiple raised keys, and the upper line layer has correspondingly multiple raised hulls. This allows for the fulfillment of different usage requirements.

[0011] In some embodiments, the first conductive wires on the outer periphery of each convex hull are two, three, or four. This allows the first conductive wires to be located in opposite directions of the convex hull, ensuring that at least one conductive wire remains connected during tensile deformation of the convex hull. Attached Figure Description

[0012] Figure 1 This is an exploded view of the structure of a membrane switch according to this utility model;

[0013] Figure 2 This is a schematic diagram of the upper wire layer in a membrane switch according to this utility model;

[0014] Figure 3 This is a schematic diagram of a portion of the circuit of a membrane switch according to the present invention, where the first conductive wire has two wires.

[0015] Figure 4 This is a schematic diagram of a portion of the circuit of a membrane switch according to the present invention, wherein the first conductive wire has three wires;

[0016] Figure 5 This is a schematic diagram of a portion of the circuit of a membrane switch according to this utility model, where the first conductive wire has four wires. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Reference Figures 1-2A membrane switch includes, from top to bottom, a panel layer 1, a top adhesive layer 2, an upper wiring layer 3, an insulating layer 4, a lower wiring layer 5, and a bottom adhesive layer 6. The panel layer 1 has raised keys 11, and the upper wiring layer 3 has raised bumps 31, which are correspondingly positioned to the raised keys 11. The upper wiring layer 3 has connecting wires 32, and the outer periphery of the raised bumps 31 has multiple first conductive lines 33, each electrically connected to the connecting wires 32. Each raised bump 31 has at least two first conductive lines 33, and these lines are evenly distributed around the outer periphery of the corresponding raised bump 31. The insulating layer 4 separates the upper wiring layer 3 from the lower wiring layer 5, preventing short circuits due to contact between the two. The arrangement of the panel layer 1, the top adhesive layer 2, the upper wiring layer 3, the insulating layer 4, the lower wiring layer 5, and the bottom adhesive layer 6 is the same as that in existing membrane switches and will not be described further here.

[0019] In the actual processing, after the connecting wires 32 and the first conductive wires 33 are printed on the upper wire layer 3, the convex clasp 31 is formed. The convex clasp 31 can be formed by stretching in a mold. During the forming process, the first conductive wires 33 are stretched. Since there are at least two first conductive wires 33 on the outer periphery of each convex clasp 31, if the gap on one side of the mold is too large, causing one of the corresponding first conductive wires 33 to break, there will be no excessive gap on the other side of the mold. This ensures that the first conductive wires 33 at other positions will not break, guaranteeing that at least one first conductive wire 33 remains connected. Thus, the connecting wires 32 on the upper wire layer 3 are always connected to the first conductive wires 33 on the convex clasp 31, thereby ensuring the normal use of the corresponding convex key.

[0020] Each convex 31 has a second conductive line 34 on its outer periphery. The second conductive line 34 is located on the outer periphery of the first conductive line 33. The first conductive line 33 on the outer side of each convex 31 is connected to the corresponding second conductive line 34. The second conductive line 34 is arc-shaped and is connected to the connecting wire 32. The arc shape of the second conductive line 34 facilitates its routing, reduces the space occupied by the second conductive line 34, and facilitates the distribution of multiple convex keys on the entire membrane switch.

[0021] Therefore, the second conductive line 34 can be connected to each of the first conductive lines 33, and the second conductive line 34 can be conveniently connected to the connecting wire 32 without each first conductive line 33 needing to be directly connected to the connecting wire 32 separately, which simplifies the circuit structure and facilitates the wiring of each wire.

[0022] The convex bulge 31 is provided with a third conductive line 35 and a fourth conductive line 36. The third conductive line 35 is circular, and the fourth conductive line 36 is located inside the third conductive line 35 and there are multiple fourth conductive lines. Both ends of the fourth conductive line 36 are connected to the third conductive line 35.

[0023] One end of the first conductive wire 33 is connected to the third conductive wire 35, and the other end is connected to the second conductive wire 34. The third conductive wire 35 forms a loop, which facilitates the connection between the first conductive wire 33 and the third conductive wire 35 in corresponding directions; at the same time, it facilitates the corresponding increase or decrease in the number of fourth conductive wires 36 and their connection with the third conductive wire 35.

[0024] The third conductive line 35 is located at the bottom end of the convex hull 31, which facilitates the connection of the third conductive line 35 with each corresponding wire.

[0025] Multiple raised keys 11 are formed on the panel layer 1, and multiple raised bumps 31 are correspondingly provided on the upper line layer 3.

[0026] In practical use, the first conductive wire 33 on the outer periphery of each convex 31 is preferably two, three, or four (e.g., Figures 3 to 5 (As shown); the number of first conductive lines 33 on each convex 31 can also be five or other corresponding numbers, which can be increased or decreased according to actual usage requirements. Therefore, when one of the first conductive lines 33 breaks, the other first conductive lines 33 remain connected to the third conductive line 35 and the connecting wire 32, realizing the conduction of the circuit and ensuring the complete function of the corresponding button.

[0027] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A membrane switch, characterized in that, The assembly includes, from top to bottom, a panel layer (1), a top adhesive layer (2), an upper wire layer (3), an isolation layer (4), a lower wire layer (5), and a bottom adhesive layer (6). The panel layer (1) has a raised key (11), and the upper wire layer (3) has a raised bulge (31). The raised bulge (31) is correspondingly arranged with the raised key (11). The upper wire layer (3) has a connecting wire (32). The outer periphery of the raised bulge (31) has multiple first conductive wires (33). Each first conductive wire (33) is electrically connected to the connecting wire (32). Each raised bulge (31) has at least two first conductive wires (33) on its outer periphery, and each first conductive wire (33) is evenly distributed on the outer periphery of the corresponding raised bulge (31).

2. A membrane switch according to claim 1, characterized in that, Each of the convex bulges (31) has a second conductive line (34) on its outer periphery. The second conductive line (34) is located on the outer periphery of the first conductive line (33). The first conductive line (33) on the outer side of each of the convex bulges (31) is connected to the corresponding second conductive line (34). The second conductive line (34) is arc-shaped and is connected to the connecting wire (32).

3. A membrane switch according to claim 2, characterized in that, The convex hull (31) is provided with a third conductive line (35) and a fourth conductive line (36). The third conductive line (35) is circular, and the fourth conductive line (36) is located inside the third conductive line (35) and there are multiple fourth conductive lines. Both ends of the fourth conductive line (36) are connected to the third conductive line (35).

4. A membrane switch according to claim 3, characterized in that, One end of the first conductive line (33) is connected to the third conductive line (35), and the other end is connected to the second conductive line (34).

5. A membrane switch according to claim 3 or 4, characterized in that, The third conductive line (35) is located at the bottom end of the convex hull (31).

6. A membrane switch according to claim 5, characterized in that, The panel layer (1) is provided with a plurality of convex keys (11), and the upper line layer (3) is provided with a plurality of convex hulls (31).

7. A membrane switch according to claim 6, characterized in that, The first conductive line (33) on the outer periphery of each of the convex hulls (31) is two, three or four.

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