Common ground of flexible board type switch

　　Flexible board type: main characteristic is working fulcrum is in central and working point is in fulcrum both sides, when press face of a working face, another working face is up, form is like seesaw.
　　Since the 1980s, the switch gradually emerged, and widely used in buses, cars, according to the different USES of its internal structure is also different.
　　(1) common features:
　　A. The appearance is black and non-reflective. The materials are generally black nylon 6 and nylon 66.
　　B. According to international regulations, there are marks of different shapes on the switch buttons according to different switch functions. The marking can be formed in two ways: one is to embed the button as a insert, and the other is to use laser engraving for the buttons sprayed with black ink.
　　C. In order to facilitate the vehicles to drive at night, there are also different color light emitting instructions on the signs. There are two kinds of light emitting sources: one is micro bulb, and the other is led tube.
　　D. There are clamping springs at both ends around, which are convenient for installation on the instrument panel.