Double-layer pressure surface capacitive touch key film

Abstract

The utility model discloses a double-layer pressure surface capacitance touch key film, which belongs to the technical field of flexible circuit boards, and comprises a key film body, the key film body comprises an upper circuit layer and a lower circuit layer, a key sheet layer is arranged between the upper circuit layer and the lower circuit layer, and the upper circuit layer and the lower circuit layer are arranged on the key sheet layer. Through the cooperation of the upper circuit layer, the lower circuit layer and the key sheet layer, the upper circuit layer and the lower circuit layer are arranged to be conventional capacitive touch keys, and the middle key sheet layer is made of gummed paper, so that a key film body attached to a product does not deform when a user touches the key film generally, and the key film body is not prone to deformation when a certain pressure is used. When the button is pressed, the button film body is deformed only when the button is touched, so that the anti-touch performance of the button is improved, the satisfaction degree of customers is enhanced, and the button is in a closed state by arranging the upper adhesive paper layer and the lower adhesive paper layer, so that the distance between the upper circuit layer and the lower circuit layer can be reduced when a user presses the button, and signal transmission is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible circuit boards, in particular to a double-layer pressure surface capacitance touch key film. Background Art

[0002] Capacitive touch buttons refer to devices that can accurately detect finger touch. Capacitive touch button control chips are usually widely used in applications such as remote controls, lamp dimming, various switches, and car-mounted, small appliances, and home appliance control interfaces. The capacitive touch button sensing principle uses the human body's inductive capacitance to detect whether there is a finger. When no finger is pressed, due to the presence of distributed capacitance on the button, there is a certain static capacitance between the button and the ground. When no finger is pressed, each button has an equivalent static capacitance to the ground. When a finger is pressed, the human body capacitance is superimposed on the button, and the capacitance of the button to the ground increases. The capacitance value obtained in this way is input into the chip for processing to detect and judge the degree of this change. When this change exceeds a certain domain value, it is considered that the finger is pressed, thereby realizing the touch function.

[0003] Although the product's functional application is simple and the touch sensitivity can be freely adjusted, the frequency of false touches will increase, resulting in the problem of key linkage, and the anti-false touch function of the keys will be reduced. As a result, some products may come into contact with the human body multiple times. In order to solve the above problems, we have proposed a double-layer pressure surface capacitive touch key film. Utility Model Content

[0004] The purpose of the present utility model is to provide a double-layer pressure surface capacitive touch key film. By arranging an upper circuit layer, a lower circuit layer and a key sheet layer, the upper and lower circuit layers are configured as conventional capacitive touch keys, and the middle pressure layer is made of adhesive tape. Therefore, the touch key film adhered to the product will not deform under normal user touch. However, the touch key film will deform only when a certain pressure is applied, thereby improving the anti-touch performance of the key and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a double-layer pressure surface capacitive touch key film, including a key film body, the key film body including an upper circuit layer and a lower circuit layer, a key sheet layer is arranged in the middle position of the upper circuit layer and the lower circuit layer, the upper surface of the upper circuit layer is provided with an upper adhesive paper layer, and the lower surface of the lower circuit layer is provided with a lower adhesive paper layer.

[0006] Preferably, silver glue and conductive oil are provided on the surfaces of the upper circuit layer and the lower circuit layer, the silver glue is wrapped around the outside of the conductive oil, and the conductive oil is transparent.

[0007] Preferably, the upper and lower line layers are provided with reinforcing sheets at the end away from the conductive oil, and the lower surface of the reinforcing sheet is attached to the silver glue.

[0008] Preferably, the upper and lower glue paper layers are attached with hand tearing stickers on the outer side, and the upper and lower line layers are provided with through holes at the corresponding positions.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] 1. The double-layer pressure surface capacitive touch key film is provided with an upper line layer, a lower line layer and a key piece layer, the upper and lower line layers are set as conventional capacitive touch keys, the middle key piece layer is set as a glue paper material, so that the key film body will not be deformed when a user normally touches the product, and the key film body will be deformed when a certain pressure is used, thereby improving the anti-touch performance of the key and enhancing the satisfaction of customers.

[0011] 2. The double-layer pressure surface capacitive touch key film is provided with an upper glue paper layer and a lower glue paper layer, which are used for the client-side attachment of the product, so that the user can make the distance between the upper and lower line layers smaller when pressing, thereby facilitating the transmission of signals. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Fig. 2 It is a schematic diagram of the key film body structure of the utility model;

[0014] Fig. 3 It is a schematic diagram of the key film body structure of the utility model.

[0015] Reference numerals in the drawing: 1, key film body; 101, upper line layer; 102, lower line layer; 103, key piece layer; 2, upper glue paper layer; 3, lower glue paper layer; 4, silver glue; 5, conductive oil; 6, reinforcing sheet; 7, hand tearing sticker; 8, through hole. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] The utility model provides a double-layer pressure surface capacitive touch button membrane Figs. 1-3 As shown in double-layer pressure surface capacitive touch button membrane, including key membrane body 1, key membrane body 1 includes upper circuit layer 101, lower circuit layer 102, the middle position of upper circuit layer 101 and lower circuit layer 102 is provided with key piece layer 103, the upper surface of upper circuit layer 101 is provided with upper adhesive paper layer 2, the lower surface of lower circuit layer 102 is provided with lower adhesive paper layer 3, through the cooperation of upper circuit layer 101, lower circuit layer 102 and key piece layer 103, upper circuit layer 101 and lower circuit layer 102 are set as conventional capacitive touch button, the middle key piece layer 103 is set as adhesive paper material, therefore, the key membrane body 1 of product bonding will not produce deformation under general touch of user, but touch key membrane body 1 will produce deformation under using certain pressure, therefore, the anti-touch performance of key is improved, thereby the satisfaction of customer is enhanced.

[0018] The surface of upper circuit layer 101 and lower circuit layer 102 is provided with silver glue 4 and conductive oil 5, the silver glue 4 is wrapped in the outer side of conductive oil 5, the conductive oil 5 is transparent, through the silver glue 4 and conductive oil 5 set up, the electrical connection of upper circuit layer 101 and lower circuit layer 102 can be provided, and the transmission of signal is convenient.

[0019] The end of upper circuit layer 101 and lower circuit layer 102 surface away from conductive oil 5 is provided with reinforcing sheet 6, the lower surface of reinforcing sheet 6 is bonded with silver glue 4, and the functionality of signal transmission of upper circuit layer 101 and lower circuit layer 102 is enhanced.

[0020] The outer side of upper adhesive paper layer 2 and lower adhesive paper layer 3 is pasted with hand tear sticker 7, the surface of upper circuit layer 101 and lower circuit layer 102 is provided with through -hole 8 in corresponding position, the upper adhesive paper layer 2 and lower adhesive paper layer 3 on the surface of key membrane body 1 can be torn open by user, thereby can be bonded with the client end of product, and the through -hole 8 set up can further strengthen the effect of fixed installation of user conveniently.

[0021] In specific use, the upper circuit layer 101, the key piece layer 103 and the lower circuit layer 102 are sequentially laminated, then the upper circuit layer 101 and the lower circuit layer 102 are set as the conventional capacitive touch key, and the middle key piece layer 103 is set as the adhesive paper material, the touch key film body 1 of the product lamination will not be deformed under general touch, but the touch key film body 1 will be deformed under a certain pressure, so that the distance between the upper circuit layer 101 and the lower circuit layer 102 becomes smaller, the deformation amount is input to the silver glue 4 and the conductive oil 5 arranged inside the touch key film body 1, the signal is output through the electrical property of the silver glue 4 and the conductive oil 5, so as to derive the signal, the signal is captured through the driving circuit, the pressure data is formed, the customer can analyze whether the pressure sensing is realized according to the real-time data, thus the touch on the touch key film body 1 is completed, the false touch performance of the touch key film body 1 is improved, and the customer's satisfaction is enhanced.

[0022] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-layer pressure surface capacitive touch key film, comprising a key film body (1), characterized in that: The key film body (1) comprises an upper circuit layer (101) and a lower circuit layer (102); a key sheet layer (103) is provided in the middle of the upper circuit layer (101) and the lower circuit layer (102); an upper adhesive paper layer (2) is provided on the upper surface of the upper circuit layer (101); and a lower adhesive paper layer (3) is provided on the lower surface of the lower circuit layer (102).

2. The double-layer pressure surface capacitive touch key film according to claim 1, characterized in that: Silver glue (4) and conductive oil (5) are provided on the surfaces of the upper circuit layer (101) and the lower circuit layer (102); the silver glue (4) is wrapped around the outside of the conductive oil (5); and the conductive oil (5) is transparent.

3. The double-layer pressure surface capacitive touch key film according to claim 2, characterized in that: A reinforcing sheet (6) is provided on one end of the surface of the upper circuit layer (101) and the lower circuit layer (102) away from the conductive oil (5), and the lower surface of the reinforcing sheet (6) is in contact with the silver glue (4).

4. The double-layer pressure surface capacitive touch key film according to claim 3, characterized in that: Hand-tear stickers (7) are pasted on the outer sides of the upper adhesive paper layer (2) and the lower adhesive paper layer (3), and through holes (8) are opened at corresponding positions on the surfaces of the upper circuit layer (101) and the lower circuit layer (102).

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