The interior central locking system can improve the convenience and safety of car use, and modern cars are increasingly installing interior central locking systems. The working principle is to generate electromagnetic force when powered on, and use electromagnetic attraction to control the locking and unlocking of car doors.

The central locking system has three functions: central control, speed control, and individual control. Central control function: The driver can lock the doors around them while also locking other doors. The driver can also choose to open each door through the door lock switch or open a specific door separately.

1. Door lock switch: Most central control negative switches are composed of a main switch and a sub switch. The main switch is installed on the door next to the driver, and the driver can operate the main switch to lock or open all the doors of the vehicle; Separated and installed on other doors, one door can be controlled separately.

2. Door lock actuator: The central locking actuator is used to execute the driver's instructions to lock or unlock the door lock. The door lock actuator has three driving modes: electromagnetic, DC motor, and permanent magnet motor. Their structures are designed to lock or open doors by changing their polarity and direction of motion.