Membrane Switch Keyboard

What is Membrane Switch?

Membrane switch are waterproof, dustproof, oil-proof, harmful gas corrosion resistant, stable and reliable performance, lightweight, small in size, long life, easy to assembly, and assembly, the panel can be washed without the characters being damaged, rich in colors, beautiful appearance, etc. advantage. Use membrane switches to make your products more contemporary. The main type of membrane switch is a membrane switch panel, which is made of a rigid or flexible printed circuit board as a base, installed with touch or non-touch buttons, and then covered with plastic (polycarbonate PC, polyester PET) printed with colorful decorative patterns. etc.) is an electronic component composed of a thin membrane switch that integrates switching functions and decorative functions. It is a new type of human-computer dialogue interface. The connection between the switch circuit and the whole machine can be accomplished by welding or plugging.

Membrane Switch Keyboard Classified by Structure

• Flat non-touch type:

Long service life but non-tactile;

• Film convex touch type:

Has a good tactile feel, but has a relatively short service life;

• Convex frame non-touch type:

Beautiful appearance, strong three-dimensional sense, but no touch;

• Convex frame touch type:

The appearance is beautiful, has a strong three-dimensional sense, and has a tactile feel;

• Surface embossed touch type:

Type (a): When the design is improper, it is easy to have a two-stage phenomenon, but the panel is damaged and the electrical performance is still there;
Type (b): There is no two-stage phenomenon, and there are few structural layers, which is more economical. If the panel is damaged, the electrical performance will not exist;

• Metal shrapnel type:

Type (a): It is the most basic and commonly used structure. The shrapnel plays the role of both touch and line;
Type (b): has a complex structure and is used in situations where there are many and dense shrapnel and no jumpers are required. The shrapnel is placed on the upper line, the conductive surfaces of the upper and lower lines are upward, and the upper line needs to be punched. When this structure is turned on, the four legs of the shrapnel are not in the same plane as the center point, and there are “two sections”. At the same time, the shrapnel is often in an excessively concave state. After a long time, the shrapnel will not rebound, so it is not recommended;
Type (c): The shrapnel is placed on the upper line and only plays a tactile role. The conductive surface of the upper line is downward and the conductive surface of the lower line is upward. If there are “two sections”, it is not recommended;
Type (d): The shrapnel is placed on the lower line, and there are traces on both the upper and lower wires. The shrapnel not only functions as a tactile sensation but also connects the upper and lower lines; it is used when the shrapnel is dense and does not have jumps. In the case of wires, the structure is simpler than type (b). When designing, attention should be paid to routing the circuit to avoid the four legs of the shrapnel to ensure there is no short circuit.

• Luminous body shape:

Be sure to open the bottom plastic mold;
(a) The LED circuit and the lower circuit are on the same layer: the structure is simple, but if the height of the selected LED lamp is higher, the LED lamp will lift the panel. At this time, the LED window on the panel should be convex or the surface adhesive layer should be thickened. The thickness makes it thicker than the thickness of the LED lamp;
(b) The LED circuit and the lower circuit are on different layers: The structure is complex, but the LED window does not have to be convex, but the area above the LED light must be hollowed out to prevent light from passing through the LED light hole. Note: When wiring the wiring at this time, you need to avoid wiring around the LED light hole.

• Half-fold type:

This type can avoid jumpers and does not require drilling holes so that the conductive surface can be downward. The disadvantage of this structure is that the lines are easily broken at the fold.

• Waterproof type of inner and outer frames:

The outer frame is a closed frame with no wiring. It protects the inner frame and prevents moisture from entering the casing from the outlet groove.