Liquid-proof keyboard conducting film

Abstract

The utility model provides a liquid-proof keyboard conductive film, which comprises a lower PET film, a lower hydrogel film, a middle PET film, an upper hydrogel film and an upper PET film, the lower PET film, the lower hydrogel film, the middle PET film, the upper hydrogel film and the upper PET film are sequentially adhered from bottom to top, the lower PET film is provided with mechanism holes, the middle PET film is provided with through holes, the lower hydrogel film is provided with a lower air passage, and the upper air passage is provided with a lower air passage. One end of the lower-layer air channel is communicated with the mechanism hole, the other end of the lower-layer air channel is communicated with the lower end of the through hole, the upper-layer water glue film is provided with an upper-layer air channel, one end of the upper-layer air channel is communicated with the outer side of the edge of the upper-layer water glue film, and the other end of the upper-layer air channel is communicated with the upper end of the through hole. The air in the mechanism hole firstly passes through the lower-layer air channel and the upper-layer air channel and then is discharged from the edge of the upper-layer glue film, so that external water vapor does not easily reach the mechanism hole, the service life of a circuit and a metal dome is prolonged, and the key response of the keyboard is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of keyboard conductive films, in particular to a liquid-proof keyboard conductive film. Background Art

[0002] A keyboard conductive film, also known as a metal shrapnel conductive film, is a PET thin sheet containing metal shrapnel, which is used as a switch on a circuit board such as a PCB or FPC, and plays an important role as a tactile switch between the user and the instrument. It realizes the conductive function by printing conductive silver paste on the PET thin sheet. When using a traditional keyboard, if water or other liquids are accidentally spilled on the keyboard, the water or other liquids will directly flow into the keyboard, remain inside the keyboard or cause a short circuit in the internal circuit of the conductive film. Since the waterproof function of the conductive film is not ideal, it causes abnormal use of the conductive function, and problems such as adjacent key control disorders and affecting the operation effect are likely to occur. Therefore, it is necessary to make a liquid-proof keyboard conductive film to solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a liquid-proof keyboard conductive film to solve the problems mentioned in the background art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A liquid-proof keyboard conductive film includes a lower PET film, a lower water glue film, a middle PET film, an upper water glue film and an upper PET film. The lower PET film, the lower water glue film, the middle PET film, the upper water glue film and the upper PET film are adhesively bonded in sequence from bottom to top. Mechanism holes are provided on the lower PET film, through holes are provided on the middle PET film, lower air channels are provided on the lower water glue film, one end of the lower air channels is communicated with the mechanism holes, and the other end is communicated with the lower end of the through holes. Upper air channels are provided on the upper water glue film, one end of the upper air channels is communicated with the outside of the edge of the upper water glue film, and the other end is communicated with the upper end of the through holes.

[0006] Further description of the utility model: The lower air channels include first longitudinal air channels and first transverse air channels. Two groups of first longitudinal air channels are provided. Both ends of the first transverse air channel are communicated with the two groups of first longitudinal air channels respectively. The mechanism holes are communicated with one group of first longitudinal air channels, and the through holes are communicated with the other group of first transverse air channels.

[0007] Further description of the utility model: The first longitudinal air channels and the first transverse air channels are composed of multiple groups of sequentially connected S-shaped air channels.

[0008] Further description of the present utility model: The upper air duct includes a second longitudinal air duct and a second transverse air duct. One end of the second longitudinal air duct is communicated with one end of the second transverse air duct, the other end of the second longitudinal air duct is communicated with the through hole, and the other end of the second transverse air duct is communicated with the outside of the edge of the upper water glue film.

[0009] Further description of the present utility model: The second longitudinal air duct and the second transverse air duct are composed of multiple groups of sequentially communicated S-shaped air ducts.

[0010] Further description of the present utility model: The through hole is a cylindrical hole.

[0011] The beneficial effect of the present utility model is that by arranging the upper air duct on the upper PET film, the lower air duct and the upper air duct are communicated through the through hole, so that the gas in the mechanism hole first passes through the lower air duct and the upper air duct and then is discharged from the edge of the upper water glue film. The overall length of the air duct is doubled, making it difficult for external water vapor to reach the mechanism hole, prolonging the service life of the circuit and the dome sheet, and making the key response of the keyboard more stable and reliable. Description of the Drawings

[0012] Figure 1 is the structural diagram of the upper water glue film in the present utility model;

[0013] Figure 2 is the structural diagram of the lower water glue film in the present utility model;

[0014] Figure 3 is the cross-sectional structural schematic diagram of the present utility model;

[0015] Figure 4 is the structural diagram of the upper water glue film in the prior art;

[0016] Figure 5 is the structural diagram of the lower water glue film in the prior art;

[0017] Figure 6 is the cross-sectional structural schematic diagram of the prior art;

[0018] Description of the Reference Numerals:

[0019] 01, lower PET film; 011, mechanism hole; 02, lower water glue film; 021, lower air duct; 0211, first longitudinal air duct; 0212, first transverse air duct; 03, middle PET film; 031, through hole; 04, upper water glue film; 041, upper air duct; 0411, second longitudinal air duct; 0412, second transverse air duct; 05, upper PET film. Detailed Embodiment

[0020] The present utility model will be further described below with reference to the drawings:

[0021] AsFigures 1 to 6 As shown, a liquid-proof keyboard conductive film comprises a lower PET film 01, a lower hydrogel film 02, a middle PET film 03, an upper hydrogel film 04 and an upper PET film 05. The lower PET film 01, the lower hydrogel film 02, the middle PET film 03, the upper hydrogel film 04 and the upper PET film 05 are sequentially bonded from bottom to top. The lower PET film 01 is provided with a mechanism hole 011, the middle PET film 03 is provided with a through hole 031, the lower hydrogel film 02 is provided with a lower airway 021, one end of the lower airway 021 is communicated with the mechanism hole 011, and the other end is communicated with the lower end of the through hole 031, the upper hydrogel film 04 is provided with an upper airway 041, one end of the upper airway 041 is communicated with the outer side of the edge of the upper hydrogel film 04, and the other end is communicated with the upper end of the through hole 031.

[0022] When the keyboard is used, the gas at the bottom of the key will enter the mechanism hole 011 when the key is pressed. It is necessary to set an air channel connected to the mechanism hole 011 to discharge the gas outward to achieve air pressure balance and make the key feel better when pressed. Figures 4 to 6 As shown, the airway setting in the prior art, after pressing the key, the gas in the mechanism hole 011 is directly discharged to the periphery of the conductive film through the lower airway 021, but due to the existence of the airway, external water vapor is also easy to enter the mechanism hole 011 through the airway, causing adverse effects on the circuit and the pot piece on the conductive film, while the present design also sets an upper airway 041 on the upper PET film 05, and the lower airway 021 and the upper airway 041 are connected through the through hole 031, so that the gas in the mechanism hole 011 first passes through the lower airway 021 and the upper airway 041, and then is discharged from the edge of the upper hydrogel film 04, the overall length of the airway is doubled, so that external water vapor is not easy to reach the mechanism hole 011, the service life of the circuit and the pot piece is extended, and the key response of the keyboard is made more stable and reliable.

[0023] The lower layer air channel 021 includes a first longitudinal air channel 0211 and a first transverse air channel 0212. Two groups of first longitudinal air channels 0211 are provided. Both ends of the first transverse air channel 0212 are respectively connected to the two groups of first longitudinal air channels 0211. The mechanism hole 011 is connected to one group of first longitudinal air channels 0211, and the through hole 031 is connected to the other group of first transverse air channels 0212. The air channel is provided in a combination of transverse and longitudinal directions, so that water vapor is more difficult to enter the mechanism hole 011.

[0024] The first longitudinal air channel 0211 and the first transverse air channel 0212 are composed of a plurality of groups of sequentially connected S-shaped air channels. The S-shaped air channel can increase the air channel length, further making it difficult for water vapor to enter the mechanism hole 011.

[0025] The upper airway 041 includes a second longitudinal airway 0411 and a second transverse airway 0412. One end of the second longitudinal airway 0411 communicates with one end of the second transverse airway 0412, the other end of the second longitudinal airway 0411 communicates with the through hole 031, and the other end of the second transverse airway 0412 communicates with the outside of the edge of the upper water glue film 04. The airway is arranged in a combination of transverse and longitudinal directions, making it more difficult for water vapor to enter the mechanism hole 011.

[0026] The second longitudinal airway 0411 and the second transverse airway 0412 are composed of multiple groups of sequentially connected S-shaped airways. The S-shaped airways can increase the airway length, further making it difficult for water vapor to enter the mechanism hole 011.

[0027] The through hole 031 is a cylindrical hole, which is convenient for processing and conducive to the smooth discharge of air flow.

[0028] The above does not impose any limitation on the technical scope of the present utility model. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A liquid-proof keyboard conductive film, characterized in that: The invention comprises a lower PET film, a lower hydrogel film, a middle PET film, an upper hydrogel film and an upper PET film, wherein the lower PET film, the lower hydrogel film, the middle PET film, the upper hydrogel film and the upper PET film are sequentially bonded from bottom to top, the lower PET film is provided with a mechanism hole, the middle PET film is provided with a through hole, the lower hydrogel film is provided with a lower airway, one end of the lower airway is communicated with the mechanism hole, and the other end is communicated with the lower end of the through hole, the upper hydrogel film is provided with an upper airway, one end of the upper airway is communicated with the outer side of the edge of the upper hydrogel film, and the other end is communicated with the upper end of the through hole.

2. The liquid-proof keyboard conductive film according to claim 1, characterized in that: The lower layer air duct includes a first longitudinal air duct and a first transverse air duct. The first longitudinal air duct is arranged in two groups. The two ends of the first transverse air duct are respectively connected to the two groups of the first longitudinal air ducts. The mechanism hole is connected to one group of the first longitudinal air ducts, and the through hole is connected to the other group of the first transverse air ducts.

3. The liquid-proof keyboard conductive film according to claim 2, characterized in that: The first longitudinal air channel and the first transverse air channel are composed of a plurality of groups of sequentially connected S-shaped air channels.

4. The liquid-proof keyboard conductive film according to claim 1, characterized in that: The upper air channel includes a second longitudinal air channel and a second transverse air channel, one end of the second longitudinal air channel is connected to one end of the second transverse air channel, the other end of the second longitudinal air channel is connected to the through hole, and the other end of the second transverse air channel is connected to the outer side of the edge of the upper hydrogel film.

5. The liquid-proof keyboard conductive film according to claim 4, characterized in that: The second longitudinal air passage and the second transverse air passage are composed of a plurality of groups of sequentially connected S-shaped air passages.

6. The liquid-proof keyboard conductive film according to claim 1, characterized in that: The through hole is a cylindrical hole.

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