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Shenzhen Xinjie Jia Talks about the Structure and Types of Thin Film Switches

Release time:

2023-06-06 08:55

 Shenzhen Xinjie Jia Talks about the Structure and Types of Thin Film Switches
Thin film switch structure
1) Flat, non tactile:
Long service life, but no tactile sensation;
2) Film convex tactile type:
Has good tactile sensation, but relatively short service life;
3) Raised border non tactile type:
Appearance is beautiful, with a strong three-dimensional feeling, but no tactile sensation;
4) Raised border tactile type:
Appearance is beautiful, with a strong three-dimensional sense and a touch;
5) Surface embossing tactile type:
(a) Type: Improper design can easily result in two segments, but the surface is damaged and the electrical function also exists;
(b) Type: There is no two-stage phenomenon and there are fewer structural layers, which is more economical. If the surface plate is damaged, the electrical function will not exist;
6) Metal shrapnel type:
(a) Type: The most basic and commonly used structure. The shrapnel serves as both a tactile sensation and a circuit;
(b) Type: It has a complex structure and is used in situations where there are many dense shrapnel and there are no jumpers. Place the shrapnel on the upper and lower wire paths, with the conductive surfaces facing upwards. The upper and lower wire paths need to be punched. When this structure is conductive, the four legs of the fragment are not in the same plane as the central point, and there are "two segments" that arise. At the same time, the shrapnel is often in a strong state of excessive concavity, and over time, the shrapnel will rise and not rebound, which is not recommended;
(c) Type: The shrapnel is placed on the upper circuit and only serves as a tactile sensation. The upper circuit is conductive facing downwards and the lower circuit is conductive facing upwards, and there are "two sections", so it is not recommended to use it;
(d) Type: The shrapnel is placed on the lower line, with both the upper and lower lines running. The shrapnel not only serves as a tactile sensation but also connects the upper and lower lines; Used in situations where there are many shrapnel, dense, and no jumpers, it has a simpler structure than the (b) type. When designing, attention should be paid to avoiding the four legs of shrapnel in the wiring to ensure no short circuit.
7) Luminous body shape: Be sure to open the bottom rubber mold;
(a) The LED circuit is on the same layer as the lower circuit: the structure is simple, but the LED window needs to be raised, otherwise, the LED light will lift the surface plate; It is advisable to choose small LED lights with lower height or occasions with fewer LED lights;
(b) LED circuit and lower circuit have different layers: the structure is complex, but the LED window does not necessarily need to be convex. It is suitable to choose dual color LED lights or occasions with a large number of LED lights; Punching and bottom rubber molds need to be opened;
8) Half Fold:
This type of structure can avoid jumpers and does not require holes to make the conductive surface downward. The disadvantage of this structure is that the line is easily broken at the fold.
9) Waterproof inner and outer frames:
The outer frame is a sealed frame without wiring, providing protection for the inner frame and preventing moisture from entering the casing from the outlet groove.
switch type
Flexible membrane switch
Flexible membrane switch is a typical form of membrane switch. The reason why this kind of membrane switch is called flexible is that the facial mask layer, isolation layer and circuit layer of the membrane switch are all composed of software films with different properties.
The circuit layer of flexible film switches adopts polyester film (PET) with good electrical performance as the carrier of switch circuit graphics, and this layer is also divided into hand felt shrapnel and upper and lower circuits. Because of the properties of polyester film

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