Anti-gumming membrane switch

Abstract

The utility model discloses a kind of anti-glue film switches, specifically related to thin film switch technical field, including shell, the upper side of the shell is detachably installed with control circuit upper layer, metal spring fixed layer is clamped on the upper side of control circuit upper layer, the upper side of the metal spring fixed layer is equipped with multiple button grooves, back face rubber is installed on the shell upper surface edge, the upper side of the back face rubber is evenly provided with multiple button blocks, the shape and position of the button block correspond with the button groove of the upper side of metal spring fixed layer, interlayer is installed on the upper side of the metal spring fixed layer, face rubber layer is detachably placed at the edge of the interlayer;By the detachable installation mode between each layer structure, it is convenient to assemble and maintain, and while guaranteeing the stability of connection, the overall performance of thin film switch will not be affected, effectively improve the anti-glue ability of thin film switch, prolong its service life.

Description

Technical Field

[0001] This utility model relates to the field of membrane switch technology, and more specifically, to a membrane switch that prevents adhesive delamination. Background Technology

[0002] Membrane switches, as electronic components that integrate button and indicator functions, are widely used in various electronic devices due to their advantages such as compact structure, beautiful appearance, and convenient operation. However, in the existing technology, membrane switches generally suffer from the problem of easy adhesive peeling, which to some extent affects their performance stability and service life.

[0003] Existing publication number CN212967479U discloses a membrane switch, including a housing and a substrate layer fixed inside the housing. The substrate layer consists of an upper substrate and a lower substrate. An electrical circuit is etched on the surface of the lower substrate, and several electrical contact pads electrically connected to the electrical circuit are welded to the surface of the lower substrate. The upper substrate has several first through holes corresponding to the electrical contact pads. A button that contacts the electrical contact pad is fixed in each of the first through holes. A spring with elasticity is added to the button between the upper and lower substrates. One end of the spring is fixed in a fixing groove, and the other end is connected to an insulating ring around the electrical contact pad, ensuring that the button can freely return to its original position after being pressed. In the process of realizing this utility model, the inventors discovered the following problems with the prior art: Membrane switches are frequently subjected to button presses during daily use. This repeated external force can damage the adhesive bonding effect and accelerate the separation between the layers. Once the membrane switch shows signs of adhesive failure, it will not only affect the sensitivity and accuracy of button operation, but may also expose the internal circuitry, causing safety hazards such as short circuits.

[0004] Therefore, a membrane switch designed to prevent adhesive delamination is proposed to address the aforementioned issues. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an anti-adhesion membrane switch to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a membrane switch with anti-adhesion, comprising a housing, a control circuit upper layer detachably mounted on the upper side of the housing, a metal spring fixing layer snapped onto the upper control circuit, a plurality of button grooves formed above the metal spring fixing layer, a back adhesive layer mounted on the edge of the upper surface of the housing, a plurality of button blocks evenly arranged above the back adhesive layer, a sandwich layer mounted above the metal spring fixing layer by bolts, a top adhesive layer detachably placed at the edge of the sandwich layer, a through hole formed on the upper side of the top adhesive layer, and a membrane panel layer detachably placed on the upper side of the housing.

[0007] Preferably, the upper surface of the back adhesive is in close and complete contact with the bottom of the upper layer of the control circuit.

[0008] Preferably, a cavity is reserved at the bottom of the interlayer, and the lower layer of the control circuit is placed in the cavity of the interlayer.

[0009] Preferably, multiple adhesive dots are evenly distributed above the interlayer.

[0010] Preferably, a lead wire is fixedly connected to one side of the upper layer of the control circuit, and a connector is fixedly installed at the end of the lead wire away from the upper layer of the control circuit.

[0011] Preferably, a display screen is fixedly disposed above the thin film panel layer, and a plurality of button protrusions are evenly disposed on the upper side of the thin film panel layer. The position of the button protrusions is located directly above the adhesive dots and also corresponds to the position directly above the button blocks.

[0012] Preferably, the shape and position of the button block correspond to the button groove opened on the upper side of the metal spring fixing layer.

[0013] The technical effects and advantages of this utility model are as follows: Compared with existing technologies, this anti-adhesion membrane switch uses a back adhesive installed on the edge of the upper surface of the housing, with the back adhesive positioned between the housing and the upper layer of the control circuit. The upper surface of the back adhesive is in close and complete contact with the bottom of the upper layer of the control circuit. This design greatly enhances the connection stability between the housing and the upper layer of the control circuit, effectively reducing the risk of delamination caused by loose connection between the two.

[0014] Secondly, the adhesive layer can be detachably placed at the edge of the interlayer, and the inner wall of the thin film panel layer is in close contact with the upper surface of the adhesive layer, which further strengthens the bonding effect between the layers, making the overall structure more compact and less prone to delamination.

[0015] Compared with existing technologies, this anti-bonding membrane switch utilizes evenly distributed adhesive dots above the interlayer to buffer the pressure generated by the button during operation, preventing excessive local pressure from damaging the adhesion between the layers. Simultaneously, the button protrusions correspond to the adhesive dots and button blocks, ensuring precise button operation and reducing the impact of additional stress caused by button misalignment on the connection structure. Furthermore, the detachable installation method between the layers facilitates assembly and maintenance, ensuring connection stability without affecting the overall performance of the membrane switch. This invention effectively improves the anti-bonding capability of the membrane switch and extends its service life. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a frontal sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the right-side structure of this utility model.

[0019] The attached diagram is labeled as follows: 1. Housing; 2. Upper layer of control circuit; 3. Back adhesive layer; 4. Metal spring fixing layer; 5. Interlayer; 6. Lower layer of control circuit; 7. Adhesive dot; 8. Adhesive layer; 9. Through hole; 10. Thin film panel layer; 11. Lead wire; 12. Connector; 13. Display screen; 14. Button protrusion; 15. Button block; 16. Button groove. 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 3 The illustrated anti-adhesion membrane switch includes a housing 1. A control circuit upper layer 2 is detachably mounted on the upper side of the housing 1. A metal spring fixing layer 4 is snapped onto the upper control circuit upper layer 2. Multiple button grooves 16 are formed above the metal spring fixing layer 4. A back adhesive 3 is installed on the edge of the upper surface of the housing 1. Multiple button blocks 15 are evenly arranged above the back adhesive 3. A sandwich layer 5 is bolted onto the upper side of the metal spring fixing layer 4. A surface adhesive layer 8 is detachably placed at the edge of the sandwich layer 5. A through hole 9 is formed on the upper side of the surface adhesive layer 8. A membrane panel layer 10 is detachably placed on the upper side of the housing 1.

[0022] Specifically: The housing 1 and the upper layer 2 of the control circuit are detachable, facilitating subsequent maintenance and component replacement, thus reducing maintenance costs; secondly, multiple button grooves 16 are provided above the metal spring fixing layer 4, which, together with multiple button blocks 15 evenly arranged on the back adhesive 3, can accurately position the buttons, improving the accuracy and stability of button operation; thirdly, the metal spring fixing layer 4 is bolted to the interlayer 5, and the edge of the interlayer 5 can be detachably fitted with the adhesive layer 8. This layered and detachable design facilitates individual maintenance or adjustment of each layer, improving structural flexibility; fourthly, through holes 9 are provided on the upper side of the adhesive layer 8, which facilitates the transmission of force during button operation, ensuring the sensitivity of button feedback; and fifthly, a thin film panel layer 10 is detachably installed on the upper part of the housing 1, which not only provides protection but also facilitates the replacement of different styles of thin film panel layers 10 to meet different needs. The overall structure is reasonable and highly practical. 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 3 As shown below, see details: In a preferred embodiment, the upper surface of the back adhesive 3 is in close and complete contact with the bottom of the upper layer 2 of the control circuit. The back adhesive 3 has good adhesion and flexibility, which ensures the stability of the connection between the upper layer 2 of the control circuit and the housing 1, and can also effectively buffer the influence of external vibration on the upper layer 2 of the control circuit, ensuring the stable operation of the circuit.

[0024] In a preferred embodiment, a cavity is reserved at the bottom of the interlayer 5, and the lower layer 6 of the control circuit is placed in the cavity of the interlayer 5. The metal spring fixing layer 4 can provide a certain degree of protection for the lower layer 6 of the control circuit to avoid it from being accidentally hit by external forces. The interlayer 5 plays the role of isolation and support, separating the lower layer 6 of the control circuit from other structures, while ensuring the stability of its installation and ensuring the normal operation of the circuit.

[0025] As a preferred embodiment, multiple adhesive dots 7 are evenly distributed on the upper part of the interlayer 5. When the button block 15 is pressed, the evenly distributed adhesive dots 7 can play a good cushioning role, avoiding direct hard contact between the button block 15 and the upper structure, reducing wear and abnormal noise. At the same time, the adhesive dots 7 can also enhance the pressing feel of the button to a certain extent, making the user's operation more comfortable and smooth.

[0026] In a preferred embodiment, a lead wire 11 is fixedly connected to one side of the upper layer 2 of the control circuit. The material and specifications of the lead wire 11 are strictly selected to ensure the stability and reliability of signal transmission. A connector 12 is fixedly installed at the end of the lead wire 11 away from the upper layer 2 of the control circuit. The connector 12 can accurately connect with external equipment to realize the electrical connection between the upper layer 2 of the control circuit and external circuits or equipment, and ensure the efficient and accurate transmission of signals and electrical energy.

[0027] In a preferred embodiment, a display screen 13 is fixedly disposed above the thin film panel layer 10. The display screen 13 can clearly display various information and provide users with intuitive operation feedback. Multiple button protrusions 14 are evenly disposed on the upper side of the thin film panel layer 10. The position of the button protrusions 14 is directly above the adhesive dots 7 and also corresponds to the position of the button block 15. When the user presses the button protrusions 14, the pressure can be transmitted to the button block 15 through the buffer of the adhesive dots 7, so as to achieve a convenient and comfortable operating experience.

[0028] In a preferred embodiment, the shape and position of the button block 15 correspond to the button groove 16 opened on the upper side of the metal spring fixing layer 4. The outline and size of the button block 15 are strictly designed according to the specifications of the button groove 16. The two are perfectly matched to ensure that the button block 15 can be accurately embedded in the button groove 16. The button block 15 and the button groove 16 correspond one-to-one, ensuring the accuracy and stability of the button operation.

[0029] In this embodiment, the lead wire 11, button bump 14, and button block 15 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 without making any structural or functional improvements, and we will not go into detail here.

[0030] The working process of this utility model is as follows: First, the back adhesive 3 is firmly placed on the upper surface edge of the housing 1, so that it is between the housing 1 and the upper layer 2 of the control circuit, and the upper surface of the back adhesive 3 is in close and full contact with the bottom of the upper layer 2 of the control circuit. The upper layer 2 of the control circuit is installed on the upper side of the housing 1 in a detachable manner. The metal spring fixing layer 4 is snapped on the upper layer 2 of the control circuit. At this time, the shape and position of the button blocks 15 evenly arranged on the back adhesive 3 correspond to the button grooves 16 opened on the upper side of the metal spring fixing layer 4. Then, the interlayer 5 is detachably installed on the upper side of the metal spring fixing layer 4. The space reserved at the bottom of the interlayer 5 is used to place the lower layer 6 of the control circuit, so that it is firmly placed at the bottom of the interlayer 5 and between the metal spring fixing layer 4 and the interlayer 5. Next, the adhesive layer 8 is detachably installed at the edge of the interlayer 5. The through hole 9 opened on the upper side of the adhesive layer 8 corresponds to the button position. Subsequently, a thin film panel layer 10 is detachably placed on top of the housing 1, so that the inner wall of the thin film panel layer 10 is in close contact with the upper surface of the adhesive layer 8. At this time, a plurality of button protrusions 14 evenly and orderly arranged on the thin film panel layer 10 are located directly above the adhesive dots 7, and also correspond directly above the button blocks 15. A display screen 13 is fixedly installed on top of the thin film panel layer 10. When the user presses the button protrusion 14 on the thin film panel layer 10, the button protrusion 14 presses down on the adhesive dot 7, and at the same time the button block 15 presses down on the metal spring at the button groove 16 on the metal spring fixing layer 4, triggering the corresponding circuit signal to realize the button function. The signal is transmitted to the external device through the lead wire 11 fixedly connected to one side of the upper layer 2 of the control circuit and the connector 12 fixedly installed at the end away from the upper layer 2 of the control circuit. The display screen 13 can display the corresponding information according to the operation.

[0031] The above describes the working principle of this type of anti-adhesion membrane switch.

Claims

1. An anti-galling membrane switch comprising a housing (1), characterized in that: The upper side of the housing (1) is detachably mounted with a control circuit upper layer (2). A metal spring fixing layer (4) is snapped on top of the control circuit upper layer (2). Multiple button grooves (16) are opened on the top of the metal spring fixing layer (4). A back adhesive (3) is installed on the edge of the upper surface of the housing (1). Multiple button blocks (15) are evenly arranged on the top of the back adhesive (3). A sandwich layer (5) is installed on the top of the metal spring fixing layer (4) by bolts. A surface adhesive layer (8) is detachably placed at the edge of the sandwich layer (5). A through hole (9) is opened on the upper side of the surface adhesive layer (8). A thin film panel layer (10) is detachably placed on the top of the housing (1).

2. The anti-gel film switch according to claim 1, wherein: The upper surface of the back adhesive (3) is in close and complete contact with the bottom of the upper layer (2) of the control circuit.

3. A cut-resistant film switch according to claim 2, wherein: The bottom of the interlayer (5) has a cavity, and the lower layer (6) of the control circuit is placed in the cavity of the interlayer (5).

4. The anti-gel film switch of claim 2, wherein: Multiple adhesive dots (7) are evenly distributed above the interlayer (5).

5. A cut-resistant film switch according to claim 4, wherein: A lead wire (11) is fixedly connected to one side of the upper layer (2) of the control circuit, and a connector (12) is fixedly installed at the end of the lead wire (11) away from the upper layer (2) of the control circuit.

6. A cut-resistant film switch according to claim 4, wherein: A display screen (13) is fixedly disposed above the thin film panel layer (10). Multiple button protrusions (14) are evenly disposed on the upper side of the thin film panel layer (10). The button protrusions (14) are located directly above the glue dot (7) and also correspond to the direct top of the button block (15).

7. The anti-gel thin film switch according to claim 1, wherein: The shape and position of the button block (15) correspond to the button groove (16) opened on the upper side of the metal spring fixing layer (4).

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