An antistatic membrane switch

Abstract

This utility model discloses an antistatic membrane switch, specifically relating to the field of membrane switch technology. It includes a housing with a circuit board installed inside. Multiple spring contacts are mounted on the top of the circuit board via a fixing assembly. An insulating block is fixed to the top of each spring contact. A plastic button is mounted on the top of the insulating block. The plastic button is located on the top of the housing. A signal transmitter is mounted on the side of the circuit board. The insulating block on the top of the spring contacts enhances audible feedback. First, pressing the plastic button causes the insulating block to press down on the spring contacts, triggering the circuit board and transmitting a signal through the signal transmitter. Then, the spring contacts reset, pushing the insulating block to the bottom of the plastic button and emitting a sound, providing feedback to the user. The sound of the insulating block touching the plastic button allows the user to quickly confirm that the action has been received by the device, especially during blind operation or when wearing gloves. The sound helps determine whether the button has been pressed accurately, reducing the probability of accidental touches.

Description

Technical Field

[0001] This utility model relates to the field of membrane switch technology, and more specifically, to an antistatic membrane switch. Background Technology

[0002] A membrane switch is a flexible electronic device that integrates button function, indicator element and circuit connection. By pressing the panel, the upper and lower circuits are made to make contact and conduction to realize signal transmission. It is widely used in electronic instruments, home appliances, medical equipment, automotive electronics and other fields, and can provide devices with a simple and intuitive human-machine interface.

[0003] The existing publication number (CN211404374U) discloses an antistatic membrane switch with a blue LED. From bottom to top, it comprises a base adhesive layer, an LED circuit layer, a wire key layer, a thickened adhesive layer, a thickened layer, a fixing layer, a surface key layer, a panel, an LED light, and a button. An antistatic protective film is provided between the surface key layer and the panel. The LED light is fixed on the LED circuit layer. A raised bump is provided on the panel above the LED light. The button is fixed on the LED circuit layer. Above the button, the corresponding wire key layer, thickened adhesive layer, thickened layer, fixing layer, and surface key layer have interconnected spring contact holes. The diameter of the spring contact hole on the fixing layer is smaller than the diameter of the spring contact, and the fixing layer confines the spring contact between the fixing layer and the LED circuit layer. The common electrode has thickened wiring for stable current and to prevent breakdown. It provides a clear indication when turned on in environments without light. An antistatic protective film is applied to the back of the panel to prevent electrostatic breakdown, and an additional antistatic protective film is added to the circuit layer, providing double protection. In the process of realizing this utility model, the inventors discovered the following problems with the prior art: Existing membrane switches lack obvious physical tactile feedback when pressed. Some users, especially when operating blindly or wearing gloves, may experience multiple presses due to static electricity, leading to accidental operation and other issues. Therefore, an antistatic membrane switch is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an antistatic membrane switch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an antistatic membrane switch, comprising a housing, wherein a circuit board is installed inside the housing; a plurality of spring contacts are mounted on the top of the circuit board via a fixing assembly; an insulating block is fixedly connected to the top of the plurality of spring contacts; a plastic button is mounted on the top of the insulating block; the plastic button is located on the top of the housing; and a signal transmitter is mounted on the side of the circuit board.

[0006] Preferably, a fixing plate is fixedly connected to the side wall of the spring sheet; the fixing plate is fixedly connected to the circuit board.

[0007] Preferably, a carbon plate is mounted on the bottom of the circuit board; the carbon plate is located inside the outer casing.

[0008] Preferably, a bottom cotton is installed on the top of the carbon plate; the bottom cotton is located between the spring sheet and the carbon plate; and the top of the bottom cotton has multiple circular holes.

[0009] Preferably, the top of the spring sheet has a threaded hole; the threaded hole penetrates the carbon plate and the bottom cotton; a plastic screw is installed in the middle of the threaded hole.

[0010] Preferably, a sponge is fixed to the bottom of the carbon plate; the sponge is located on the inner sidewall of the outer shell.

[0011] Preferably, the surface of the plastic button has multiple anti-slip textures; the depth of the anti-slip textures is between 0.2-0.25mm.

[0012] Preferably, the bottom of the outer casing is provided with multiple rubber pads; the bottom of the multiple rubber pads is provided with multiple anti-slip grooves; the rubber pads are fixed to the outer casing by screws.

[0013] The technical effects and advantages of this utility model are as follows: Compared to existing technologies, this antistatic membrane switch increases audible feedback by incorporating an insulating block on top of the contact spring. First, pressing the plastic button causes the insulating block to press the contact spring downwards, triggering the circuit board and transmitting a signal via a transmitter. The contact spring then resets, pushing the insulating block to the bottom of the plastic button and emitting an audible sound, providing feedback to the user. Using a plastic button reduces static electricity during device use, and the sound of the insulating block hitting the button quickly confirms that the action has been received by the device, especially useful for blind operation or when wearing gloves. The sound helps users determine if the button was pressed correctly, reducing the probability of accidental presses.

[0014] Compared with the existing technology, this antistatic membrane switch can fix the spring to the top of the circuit board by means of a fixing plate. When the spring pops up and resets, the fixing plate can fix the spring to the top of the circuit board, reducing the possibility of misalignment of the spring when it pops up due to long-term use of the device, which may cause the button to malfunction. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram showing the cooperation between the fixing piece and the spring piece of this utility model.

[0017] Figure 3This is a schematic diagram of the structure of the carbon plate and the bottom cotton of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the rubber pad of this utility model.

[0019] The attached diagram is labeled as follows: 1. Outer shell; 11. Circuit board; 12. Spring; 13. Insulating block; 14. Plastic button; 15. Signal transmitter; 2. Fixing plate; 3. Carbon plate; 4. Base cotton; 41. Circular hole; 5. Threaded hole; 51. Plastic screw; 6. Sponge; 7. Anti-slip texture; 8. Rubber pad; 81. Anti-slip groove; 82. Screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] As attached Figures 1 to 4 An antistatic membrane switch is shown, including a housing 1, inside which a circuit board 11 is installed; a plurality of spring contacts 12 are mounted on the top of the circuit board 11 by a fixing component; an insulating block 13 is fixedly connected to the top of the plurality of spring contacts 12; a plastic button 14 is installed on the top of the insulating block 13; the plastic button 14 is located on the top of the housing 1; and a signal transmitter 15 is mounted on the side of the circuit board 11.

[0022] Specifically, when using membrane buttons, pressing the plastic button 14 first causes the insulating block 13 to press down on the spring 12. This triggers the circuit board 11, transmitting a signal through the signal transmitter 15. The spring 12 then resets, pushing the insulating block 13 to the bottom of the plastic button 14 and emitting a sound, providing feedback to the user. Using plastic buttons reduces static electricity during device use. The sound of the insulating block 13 touching the plastic button 14 allows the user to quickly confirm that the action has been received by the device, especially during blind operation or when wearing gloves. The sound helps determine whether the button was pressed accurately, reducing the probability of accidental presses. Example

[0023] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details: In a preferred embodiment, a fixing plate 2 is fixedly connected to the side wall of the spring 12; the fixing plate 2 is fixedly connected to the circuit board 11; furthermore, when the spring 12 pops up and resets, the fixing plate 2 can fix the spring 12 to the top of the circuit board 11, reducing the possibility of misalignment of the spring 12 and button malfunction due to long-term use of the device.

[0024] In a preferred embodiment, a carbon plate 3 is mounted on the bottom of the circuit board 11; the carbon plate 3 is located inside the housing 1; furthermore, the carbon plate 3 can reduce interference from other external devices with the membrane switch signal, and since the carbon plate 3 itself is relatively hard, it can increase the device's drop resistance.

[0025] In a preferred embodiment, a bottom cotton 4 is installed on the top of the carbon plate 3; the bottom cotton 4 is located between the spring piece 12 and the carbon plate 3; the top of the bottom cotton 4 has a plurality of circular holes 41; furthermore, since the bottom cotton 4 is made of rubber, when the device is dropped, the bottom cotton 4 is squeezed and deformed, reducing the impact damage to the circuit board 11, and also reducing the friction between the circuit board 11 and the carbon plate 3.

[0026] In a preferred embodiment, the top of the spring piece 12 is provided with a threaded hole 5; the threaded hole 5 passes through the carbon plate 3 and the bottom cotton 4; a plastic screw 51 is installed in the middle of the threaded hole 5; furthermore, the circuit board 11, the bottom cotton 4, and the carbon plate 3 can be fixed by passing the plastic screw 51 through the threaded hole 5.

[0027] In a preferred embodiment, a sponge 6 is fixed to the bottom of the carbon plate 3; the sponge 6 is located on the inner side wall of the outer shell 1; furthermore, by providing the sponge 6, the abnormal noise caused by the collision and friction between the carbon plate 3 and the outer shell 1 can be reduced.

[0028] In a preferred embodiment, the surface of the plastic button 14 is provided with a plurality of anti-slip textures 7; the depth of the anti-slip textures 7 is between 0.2-0.25mm; furthermore, when the plastic button 14 is pressed, the anti-slip textures 7 can increase the force-bearing area of ​​the plastic button 14 and reduce the possibility of accidental touch.

[0029] In a preferred embodiment, the bottom of the housing 1 is provided with a plurality of rubber pads 8; the bottom of the plurality of rubber pads 8 is provided with a plurality of anti-slip grooves 81; the rubber pads 8 are fixed to the housing 1 by screws 82; furthermore, the rubber pads 8 can increase the friction of the contact surface to prevent the membrane switch from sliding and falling when placed on a smooth surface.

[0030] In this embodiment, the shrapnel 12, signal transmitter 15, etc. are all commercially available devices known to those skilled in the art. They can be customized or selected according to actual needs. Here, we are only using them and have not made any structural or functional improvements. We will not go into detail here.

[0031] The working process of this utility model is as follows: First, press the plastic button 14. The anti-slip texture 7 can increase the force-bearing area of ​​the plastic button 14. At this time, the plastic button 14 causes the insulating block 13 to press the spring 12 downward. Then the circuit board 11 is triggered and the signal is transmitted through the signal transmitter 15. Then, when the spring 12 bounces back to reset, the spring 12 can be fixed to the top of the circuit board 11 by the fixing piece 2. Then the insulating block 13 is pushed to the bottom of the plastic button 14 to make a sound, and the user receives feedback. The carbon plate 3 can reduce the interference of other external devices on the membrane switch signal. Since the bottom cotton 4 is made of rubber, when the device is dropped, the bottom cotton 4 is squeezed and deformed, reducing the impact damage to the circuit board 11. The sponge 6 can reduce the abnormal noise caused by the collision and friction between the carbon plate 3 and the outer shell 1. The rubber pad 8 can increase the friction of the contact surface. The above is the working principle of this antistatic membrane switch.

Claims

1. An antistatic membrane switch comprising a housing (1), characterized in that: A circuit board (11) is installed inside the outer casing (1); multiple spring pieces (12) are installed on the top of the circuit board (11) by a fixing component; an insulating block (13) is fixed to the top of the multiple spring pieces (12); a plastic button (14) is installed on the top of the insulating block (13); the plastic button (14) is located on the top of the outer casing (1); a signal transmitter (15) is installed on the side of the circuit board (11).

2. The antistatic membrane switch according to claim 1, characterized in that: The side wall of the spring (12) is fixedly connected to a fixing piece (2); the fixing piece (2) is fixedly connected to the circuit board (11).

3. An antistatic membrane switch according to claim 1, characterized in that: A carbon plate (3) is mounted on the bottom of the circuit board (11); the carbon plate (3) is located inside the outer casing (1).

4. An antistatic membrane switch according to claim 3, characterized in that: The carbon plate (3) is fitted with a bottom cotton (4) on top; the bottom cotton (4) is located between the spring sheet (12) and the carbon plate (3); the bottom cotton (4) has multiple circular holes (41) on top.

5. An antistatic membrane switch according to claim 1, characterized in that: The top of the spring (12) is provided with a threaded hole (5); the threaded hole (5) passes through the carbon plate (3) and the bottom cotton (4); a plastic screw (51) is installed in the middle of the threaded hole (5).

6. An antistatic membrane switch according to claim 4, characterized in that: A sponge (6) is fixed to the bottom of the carbon plate (3); the sponge (6) is located on the inner side wall of the outer shell (1).

7. An antistatic membrane switch according to claim 1, characterized in that: The surface of the plastic button (14) is provided with multiple anti-slip textures (7); the depth of the anti-slip textures (7) is between 0.2-0.25mm.

8. An antistatic membrane switch according to claim 1, characterized in that: The bottom of the outer shell (1) is provided with multiple rubber pads (8); multiple anti-slip grooves (81) are opened on the bottom of the multiple rubber pads (8); the rubber pads (8) are fixed to the outer shell (1) by screws (82).

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