Water vapor prevention structure of binding area of touch screen

Abstract

The utility model discloses a moisture-proof structure for a binding area of a touch screen, which relates to the technical field of touch screens and comprises an FPC (flexible printed circuit) board, a cover plate is arranged on the side surface of a functional piece, an anti-oxidation layer is arranged on one surface, far away from the cover plate, of the binding area, a sealing layer is arranged on one surface, close to the cover plate, of the binding area, and sealing strips are arranged inside four mounting cavities. A touch screen is arranged on the outer walls of the sealing strips, a sealing film is arranged on the outer wall of the touch screen, a waterproof film is arranged on one side of each of the four sealing strips, a gap between the cover plate and the touch screen can be sealed in a large range through the sealing strips, the sealing films and the waterproof film, and surface waterproofing is achieved; meanwhile, the connection sealing strength between the waterproof film and the touch screen is enhanced, an inner layer waterproof gap is achieved, the gap between the touch screen and the cover plate is filled with the sealing strip, water vapor permeation is further prevented, the installation strength of the touch screen and the cover plate is enhanced, and external water vapor is effectively prevented from entering the interior from the touch screen.

Description

Technical Field

[0001] The utility model relates to the technical field of touch screens, in particular to a moisture-proof structure of a binding area of ​​a touch screen. Background Art

[0002] Traditional touch screens include cover glass, flexible circuit board FPC board, and touch sensing film. The flexible circuit board FPC board and the touch sensing film need to be pressed, bound and electrically connected, and the connection of the flexible circuit board also has exposed metal pins. Therefore, the requirements for water vapor and salt spray corrosion are very high here, and usually the binding area is sealed with glue to prevent salt spray and water vapor.

[0003] A touch screen is proposed in the patent with the publication number CN215895429U, which includes a functional sheet, a touch sensing layer, an adhesive layer, a cover plate, an anti-oxidation layer, a sealing layer, a binding area, and a silver finger. The material of the adhesive layer 22 is OCA optical glue. OCA optical glue is one of the raw materials of important touch screens. It is a double-sided adhesive tape without a substrate by making optical acrylic glue without a substrate, and then laminating a layer of release film on the upper and lower bottom layers. It is the best adhesive for touch screens. Its advantages are clarity, high light transmittance (total light transmittance>99%), high adhesion, high weather resistance, water resistance, high temperature resistance, UV resistance, controlled thickness, uniform spacing, and long-term use will not cause yellowing (yellowing), peeling and deterioration. The material of the touch sensing layer 21 is ITO film, which is an n-type semiconductor material with high conductivity, high visible light transmittance, high mechanical hardness and good chemical stability. It is the most commonly used thin film material for transparent electrodes of liquid crystal displays (LCDs), plasma displays (PDPs), electroluminescent displays (EL / OLEDs), touch screens), solar cells and other electronic instruments. The thickness of the anti-oxidation layer 4 is less than the thickness of the adhesive layer 22 to prevent the FPC board 1 and the functional sheet 2 from bulging when the side away from the cover plate 3 is attached to the display module (not shown in the figure). Conductive glue is attached to the surface of the FPC board 1. The conductive glue is an adhesive with a certain conductivity after curing or drying. It can connect multiple conductive materials together to form an electrical path between the connected materials. The conductive glue is an adhesive with a certain conductivity after curing or drying. It can connect multiple conductive materials together to form an electrical path between the connected materials. In this embodiment, conductive glue is set and grounding is used for static discharge. However, the following problems still exist in this patent:

[0004] The existing touch screen is pressed on the inner frame, and there is inevitably a gap between the touch screen and the outer frame. Since the touch screen is exposed to the outside, when the environment is relatively harsh, such as humid air outdoors, the water dew gathered on the touch screen can easily penetrate into the inside of the touch screen through the gap between the screen frame, affecting the normal operation of the touch screen. Once the product is immersed in water, water can easily penetrate through the gap and cause circuit short circuit and other faults, and the waterproof performance is poor.

[0005] In view of the above problems, it is necessary to design a touch screen binding area waterproof structure to overcome the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a touch screen binding area waterproof structure, which can effectively solve the problems in the background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A touch screen binding area water vapor proof structure, comprising an FPC board, a functional sheet is arranged on the side of the FPC board, and a cover plate is arranged on the side of the functional sheet;

[0009] The functional sheet is composed of a touch sensing layer and an adhesive layer, the touch sensing layer is arranged away from the cover plate, the touch sensing layer includes a plurality of silver fingers, part of the FPC board is crimped with the silver fingers to form a binding area, an anti-oxidation layer is arranged on a side of the binding area away from the cover plate, a sealing layer is arranged on a side of the binding area close to the cover plate, installation cavities are opened at the four corners of the top of the cover plate, sealing strips are arranged inside the four installation cavities, a touch screen is arranged on the outer wall of the sealing strip, a sealing film is arranged on the outer wall of the touch screen, and a waterproof film is arranged on one side of the four sealing strips.

[0010] As a preferred solution of the utility model, the FPC board includes an FPCB body and a gold finger arranged on the FPC board, the gold finger is hot-pressed connected to the silver finger on the touch sensing layer, and the FPC board is connected to the functional sheet.

[0011] As a preferred solution of the utility model, the material of the bonding layer is OCA optical glue, and the material of the touch sensing layer is ITO film.

[0012] As a preferred solution of the utility model, the thickness of the anti-oxidation layer is less than the thickness of the bonding layer, conductive glue is attached to the surface of the FPC board, the material of the anti-oxidation layer is silicon dioxide, and the material of the sealing layer is double-sided adhesive material.

[0013] As a preferred solution of the present invention, the waterproof membrane is frame-shaped, the outer portion of which is adhered to the cover plate, and the inner portion of which is adhered to the touch screen.

[0014] As a preferred solution of the utility model, the sealing film is arranged between the waterproof film and the touch screen, and adhesive is provided on both sides of the sealing film. The four sealing strips are respectively embedded in the edges of the touch screen. The touch screen is a capacitive touch screen or a resistive touch screen, and the cover plate is an aluminum panel.

[0015] Beneficial Effects

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The touch screen binding area waterproof vapor structure can seal the gap between the cover plate and the touch screen in a large range through the provided sealing strip, sealing film and waterproof film, thereby achieving surface waterproofing, and at the same time strengthening the connection sealing strength between the waterproof film and the touch screen to achieve an inner waterproof gap. The sealing strip is filled in the gap between the touch screen and the cover plate to further prevent the penetration of water vapor and strengthen the installation strength of the touch screen and the cover plate, thereby effectively preventing external water vapor from entering the interior through the touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the anti-oxidation layer structure of the utility model;

[0020] Figure 3 The utility model is a schematic diagram of the sealing film and waterproof membrane structure.

[0021] In the figure: 1. FPC board; 2. functional sheet; 3. cover plate; 4. anti-oxidation layer; 5. sealing layer; 6. binding area; 7. silver finger; 8. installation cavity; 9. sealing strip; 10. touch screen; 11. sealing film; 12. waterproof film; 201. touch sensing layer; 202. adhesive layer. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1-3 As shown, a touch screen binding area water vapor proof structure comprises an FPC board 1, a functional sheet 2 is arranged on the side of the FPC board 1, and a cover plate 3 is arranged on the side of the functional sheet 2;

[0024] The functional sheet 2 is composed of a touch sensing layer 201 and an adhesive layer 202. The touch sensing layer 201 is arranged away from the cover plate 3. The touch sensing layer 201 includes a plurality of silver fingers 7. Part of the FPC board 1 is crimped with the silver fingers 7 to form a binding area 6. An anti-oxidation layer 4 is arranged on a side of the binding area 6 away from the cover plate 3. A sealing layer 5 is arranged on a side of the binding area 6 close to the cover plate 3. Four corners of the top of the cover plate 3 are provided with mounting cavities 8. The insides of the four mounting cavities 8 are provided with sealing strips 9. The outer wall of the sealing strip 9 has a touch screen 10. The outer wall of the touch screen 10 is provided with a sealing film 11. One side of the four sealing strips 9 is provided with a waterproof film 12.

[0025] The FPC board 1 includes an FPCB body and a gold finger arranged on the FPC board, the gold finger is hot-pressedly connected to the silver finger 7 on the touch sensing layer 201, the FPC board 1 is connected to the functional sheet 2, the material of the bonding layer 202 is OCA optical glue, the material of the touch sensing layer 201 is ITO film, the thickness of the anti-oxidation layer 4 is less than the thickness of the bonding layer 202, the surface of the FPC board 1 is attached with conductive glue, the material of the anti-oxidation layer 4 is silicon dioxide, the material of the sealing layer 5 is double-sided adhesive material, the waterproof film 12 is frame-shaped, the outer part of which is adhered to the cover plate 3, and the inner part of which is adhered to the touch screen 10, the sealing film 11 is arranged between the waterproof film 12 and the touch screen 10, and both sides of it are provided with glue, four sealing strips 9 are respectively embedded in the edges of the touch screen 10, the touch screen 10 is a capacitive touch screen or a resistive touch screen, and the cover plate 3 is an aluminum panel;

[0026] Among them, by setting the sealing strip 9, the sealing film 11 and the waterproof film 12, the gap between the cover plate 3 and the touch screen 10 can be sealed in a large range to achieve surface waterproofing, and at the same time strengthen the connection sealing strength between the waterproof film 12 and the touch screen 10 to achieve an inner waterproof gap. The sealing strip 9 is filled in the gap between the touch screen 10 and the cover plate 3 to further prevent the penetration of water vapor and strengthen the installation strength of the touch screen 10 and the cover plate 3, effectively preventing external water vapor from entering the interior from the touch screen 10.

[0027] It should be noted that the utility model is a touch screen binding area waterproof vapor structure. When in use, the sealing strip 9, sealing film 11 and waterproof film 12 arranged between the cover plate 3 and the touch screen 10 can seal the gap between the surface of the cover plate 3 and the touch screen 10 to achieve surface waterproofing. The sealing strip 9 is filled in the gap between the cover plate 3 and the touch screen 10 to further prevent the penetration of water vapor and enhance the installation strength of the cover plate 3 and the touch screen 10, and waterproof the inner layer. The anti-oxidation layer 4 can ensure that long-term use will not cause yellowing, peeling and deterioration problems. The conductive glue attached to the surface of the FPC board 1 can connect a variety of point materials together to form an electrical path between the linked materials.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A touch screen binding area water vapor proof structure, comprising an FPC board (1), characterized in that: A functional sheet (2) is provided on the side of the FPC board (1), and a cover plate (3) is provided on the side of the functional sheet (2); The functional sheet (2) is composed of a touch sensing layer (201) and an adhesive layer (202); the touch sensing layer (201) is arranged away from the cover plate (3); the touch sensing layer (201) includes a plurality of silver fingers (7); a portion of the FPC board (1) is crimped with the silver fingers (7) to form a binding area (6); an anti-oxidation layer (4) is arranged on a side of the binding area (6) away from the cover plate (3); a sealing layer (5) is arranged on a side of the binding area (6) close to the cover plate (3); four corners of the top of the cover plate (3) are provided with mounting cavities (8); sealing strips (9) are arranged inside the four mounting cavities (8); a touch screen (10) is arranged on the outer wall of the sealing strip (9); a sealing film (11) is arranged on the outer wall of the touch screen (10); and a waterproof film (12) is arranged on one side of the four sealing strips (9).

2. A touch screen binding area water vapor proof structure according to claim 1, characterized in that: The FPC board (1) comprises an FPCB body and a gold finger provided on the FPC board (1), the gold finger being hot-pressed connected to the silver finger (7) on the touch sensing layer (201), and the FPC board (1) being connected to the functional sheet (2).

3. The touch screen binding area water vapor proof structure according to claim 1, characterized in that: The material of the bonding layer (202) is OCA optical glue, and the material of the touch sensing layer (201) is ITO film.

4. The touch screen binding area water vapor proof structure according to claim 1, characterized in that: The thickness of the anti-oxidation layer (4) is less than the thickness of the bonding layer (202); a conductive adhesive is attached to the surface of the FPC board (1); the material of the anti-oxidation layer (4) is silicon dioxide; and the material of the sealing layer (5) is double-sided adhesive material.

5. The touch screen binding area water vapor proof structure according to claim 1, characterized in that: The waterproof membrane (12) is frame-shaped, with its outer portion being adhered to the cover plate (3) and its inner portion being adhered to the touch screen (10).

6. The touch screen binding area water vapor proof structure according to claim 1, characterized in that: The sealing film (11) is arranged between the waterproof film (12) and the touch screen (10), and adhesive is provided on both sides thereof. The four sealing strips (9) are respectively embedded in the edges around the touch screen (10). The touch screen (10) is a capacitive touch screen or a resistive touch screen, and the cover plate (3) is an aluminum panel.

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