Pingyang chunde auto parts co. LTD：Introduction to various switches of automobile

　　Introduction to various switches of automobile
　　1. Push-pull type: created in the 1940s and developed in the 1950s, it is widely used in cars and trucks. It mainly relies on the action of pushing and pulling force to complete the connection and disconnection of the circuit. Some varieties also have bimetallic safety devices and light regulating resistance (see figure 1). At present only in the domestic bus, truck use. Its characteristic is the structure is simple, the price is cheap, the deficiency is the volume is big, the operation force is big, when the vehicle runs, the adjustment gear position is not convenient.
　　2. Rotary: mainly rely on the spindle rotation to change gear, in order to achieve the purpose of circuit on and off. There are many kinds of this kind of switch. One is a keyoperated ignition switch, which is composed of a lock mechanism and a switch. The switch is fixed by a mounting nut. The other is a switch with different shaped knobs. If use circular knob to control the switch of rearview mirror Angle, it has been used in various styles of santana 2000.
　　3. Push rod type: this kind of switch action principle is relatively simple, mainly under the action of specified external force, push rod in a certain range of linear motion, to push the contact closed (or open), once the external force disappeared, rely on its own counterforce spring automatic reset, make the contact remain original state. This is a signal switch used for doors and brake lights. At present, there are two types of coordination of brake light switch in the braking system. One is the combination of the brake light switch and the oil (gas) circuit of the braking system, which basically belongs to this type on the truck at present. The other is the separation of brake light switch and brake system. This kind of structure is mainly used in cars. The brake light switch is connected to the brake pedal by mechanical structure.
　　The product has the following characteristics: (1) the extension distance of the jacking rod can be adjusted in a certain range to meet the requirements of working stroke during braking. (2) two pairs of parallel contacts are adopted to ensure the reliability of the signal lamp when it is switched on. (3) special measures are taken in the structure and materials to ensure the reliability and durability of the products, and ensure the service life can reach more than 250,000 times.
　　4. Flexible plate type: the main feature is that the working fulcrum is in the center and the working point is on both sides of the fulcrum, when pressing a working face, another working face is up, like a seesaw. Since the 1980s, the switch gradually rise, and widely used in buses, cars, according to the use of different internal structure there are differences.
　　This paper is organized by pingyang chunde auto parts co., LTD