What are the membrane switches

　　 foldable flexible film

　　 membrane switch

　　 Flexible membrane switch is a typical form of membrane switch. This type of membrane switch is called flexible because the mask layer, isolation layer, and circuit layer of the membrane switch are all composed of flexible films with different properties. The circuit layer of the flexible membrane switch uses polyester film (PET) with good electrical performance as the carrier of the switch circuit pattern. This layer is also divided into hand-feeling shrapnel and upper and lower circuits. Due to the influence of the properties of the polyester film, the membrane switch has good insulation, heat resistance, flexural resistance and high resilience. The graphics of the switch circuit, including the switch connection and its lead wires, are printed with low-resistance, conductive paint that cures under low-temperature conditions. Therefore, the composition of the entire membrane switch has a certain degree of flexibility, which is not only suitable for use on a flat body, but also can be matched with a curved body. The lead wire of the flexible membrane switch is integrated with the switch body itself. When making the connection of the group switch, it is collected in a certain place of the membrane and extended outward according to the designated position and standard line distance of the design as a soft , The arbitrarily bendable and sealed lead wire is connected to the rear circuit of the complete machine.

　　 folded rigid film

　　 Rigid membrane switch means that the pattern and circuit of the switch are made on common printed circuit copper clad laminates.

　　 rigid membrane switch

　　 Rigid membrane switch is characterized by convenient material selection, stable process, low resistance, and some components in the circuit can be directly welded on its back. In the case of a small area, the hard liner layer can be omitted. Rigid membrane switches generally use metal guides as the conduction labyrinth contacts, so they have a better feel. The disadvantage is that it is not as easy to install and connect as a flexible membrane switch in the whole machine, and it is often necessary to weld and lead the lead through a flat cable. In addition to the buzzer signal and LED indication, the information feedback of the rigid membrane switch can generally use metal handle shrapnel.

　　 folded flat film

　　 The buttons on the membrane switch use different colors to indicate the position, shape and size of the key body, which are common in the initial stage of the membrane switch. Three-dimensional membrane switch: Usually, the buttons on the membrane switch only use colors to express the position, shape and size of the key body. so,

　　Plane membrane switch

　　 The accuracy of the operation can only be recognized by the operator's vision. Since there is no appropriate feedback information to indicate whether the finger is pressed in the effective range of the switch to make the switch operate, it affects the confidence in the monitoring of the whole machine and the speed of operation. A kind of membrane switch that makes the switch key body slightly protrude, slightly higher than the panel to form a three-dimensional shape, is called a three-dimensional key switch. The three-dimensional key can not only accurately specify the range of the key body, improve the recognition speed, make the operator's sense of touch more sensitive, but also enhance the decorative effect of the product appearance. The production of the three-dimensional key.

　　 folded raised film

　　 Usually, the buttons on the membrane switch only use colors to express the position, shape and size of the key body. In this way, the accuracy of the operation can only be recognized by the operator’s vision. Since there is no appropriate feedback information,

　　 raised membrane switch

　　 thus affected the confidence in the monitoring of the machine and the speed of operation. Therefore, in the design stage of the panel, it is necessary to make arrangements and prepare process holes for accurate positioning during mold pressing. Generally, the height of the three-dimensional protrusions should not exceed twice the thickness of the substrate. In order to make the appearance of the product beautiful, the protrusion of the raised membrane switch can be made in many variations.