Abstract: A controller with an anti-pull out structure comprises at least one socket and one plug, the anti-pull out structure is formed with the same number of notches as the socket. The notch is used to restrict the plug in the socket of the controller, which not only prevents the plug from falling off but also prevents improper insertion of the plug into the socket of the controller.

Abstract: A limit switch control device for an actuator is disposed at both ends of a linearly moveable mover and comprises at least: two limit switches, a circuit board, and a connecting rod assembly. The two limit switches are disposed on the circuit board, both ends of the connecting rod assembly define the effective travel length of the mover. One end of the connecting rod assembly is moved by the mover to control the other limit switch. By such arrangements, the limit switch is simplified, and with the arrangement of the connecting rod assembly, the number of the brake devices or the limit switches can be increased as desired. Further, the circuit board and the connecting rod assembly are modular designed.