Introduction of specific types of membrane switches


Release time:

2023-12-29

Introduction of specific types of membrane switches

flexible film

A flexible membrane switch is a typical form of membrane switch. This type of membrane switch is called flexible because the membrane switch mask layer, isolation layer, circuit layer are all composed of a variety of different properties of flexible film. The circuit layer of flexible membrane switch adopts polyester film (PET) with good electrical performance as the carrier of switch circuit pattern. This layer is also equipped with feel 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, bending resistance and high resilience. The graphics of the switch circuit, including the on-line of the switch and its outgoing lines, are printed with low-resistance, low-temperature curing conductive paint. 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 group switch online, it is collected at a certain place of the membrane and extends outward according to the position specified by the design and the standard line distance to be connected with the rear circuit of the whole machine as a soft, bendable and sealed lead wire.

 

hard film

Hard membrane switch refers to the switch graphics and lines are made in the common printed circuit copper clad laminate.

The hard membrane switch is characterized by convenient material, stable process, low resistance, and can be directly welded on the back of some components in the circuit. In the case of a small area, the hard liner layer can be omitted. Hard membrane switches generally use metal guide sheets as conductive labyrinth contacts, so they have a better feel. The disadvantage is that it is not as convenient to install 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 feel shrapnel. [2]

 

flat film

The buttons on the membrane switch, with different colors, represent the position, shape and size of the key body, which is more common in the initial stage of the membrane switch. Three-dimensional membrane switch: Usually, the buttons on the membrane switch only use color 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 indicating whether the finger is pressed on the effective range of the switch to make the switch act, the confidence and operation speed of the whole machine monitoring are affected. A membrane switch that makes the switch key body slightly convex and slightly higher than the panel to form a three-dimensional shape is called a three-dimensional key switch. Three-dimensional keys can not only accurately give the range of the key body, improve the recognition speed, make the operator's tactile sensitivity, but also enhance the decorative effect of the appearance of the product. The production of three-dimensional keys. [2]

 

Raised film

Usually, the keys on the membrane switch only use color 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, the self-confidence of the machine monitoring and the speed of operation are affected. Therefore, in the design stage of the panel, it is necessary to make arrangements and have process holes so as to have accurate positioning when the mold is pressed, and the height of the three-dimensional protrusion should not exceed twice the thickness of the substrate. For the appearance of the beautiful product, the bulge of the raised membrane switch can be made in many variations.

Keywords: membrane switch, membrane panel, touch screen