Abstract: Disclosed is a handle locking device, including a first frame, a first snap hook and a second frame. A second snap hook is provided on the first frame; the first snap hook is rotatably mounted on the first frame; the second frame is rotatably mounted on the first frame; a protruding portion is formed on the second frame; and the protruding portion can push the first snap hook towards the first frame. By having the first snap hook and second snap hook disposed asymmetrically on the first frame, accidental mounting of the “OFF” position of the handle locking device in the “ON” position of the circuit breaker during installation by an operator can be avoided. Moreover, since the protruding portion can push the first snap hook towards the first frame, forced deformation of the snap claw and second snap hook can be prevented.

Abstract: Disclosed is a handle locking device including a first frame, a first hook and a second frame, wherein a second hook is provided on the first frame. The first and second hooks are rotatably installed on the first frame, and the second frame capable of fixing the first hook and the first frame. Since the handle locking device is only be installable on a circuit breaker by mating between the first hook and a first installation part of the circuit breaker and mating between the second hook and a second installation part of the circuit breaker, an operator is prevented from unintentionally setting an “OFF” position of the handle locking device in an “ON” position of the circuit breaker during installation. The first hook is rotatably installed on the first frame, so that the handle locking device can be conveniently and rapidly installed on or demounted from the circuit breaker.

Abstract: Disclosed is a circuit breaker, including a housing; a trip rod and locking device being disposed in the housing. The locking device includes a lock head, a mounting portion, a sliding member and at least one elastic element. The mounting portion includes a base plate and a first side plate. At least one protruding portion is provided on the base plate and a through-hole is formed in the first side plate. The lock head includes a first driving member. The sliding member includes a body and a push rod. A second driving member and at least one mounting slot are formed on the body. The second driving member is mated with the first driving member and the protruding portion is located in the mounting slot. The push rod is formed on the body and can pass through the through-hole to trigger the trip rod.

Abstract: Disclosed is a handle locking device, including a first frame, a first snap hook and a second frame. A second snap hook is provided on the first frame; the first snap hook is rotatably mounted on the first frame; the second frame is rotatably mounted on the first frame; a protruding portion is formed on the second frame; and the protruding portion can push the first snap hook towards the first frame. By having the first snap hook and second snap hook disposed asymmetrically on the first frame, accidental mounting of the “OFF” position of the handle locking device in the “ON” position of the circuit breaker during installation by an operator can be avoided. Moreover, since the protruding portion can push the first snap hook towards the first frame, forced deformation of the snap claw and second snap hook can be prevented.

Abstract: Disclosed is a circuit breaker, including a housing; a trip rod and locking device being disposed in the housing. The locking device includes a lock head, a mounting portion, a sliding member and at least one elastic element. The mounting portion includes a base plate and a first side plate. At least one protruding portion is provided on the base plate and a through-hole is formed in the first side plate. The lock head includes a first driving member. The sliding member includes a body and a push rod. A second driving member and at least one mounting slot are formed on the body. The second driving member is mated with the first driving member and the protruding portion is located in the mounting slot. The push rod is formed on the body and can pass through the through-hole to trigger the trip rod.

Abstract: Disclosed is a handle locking device including a first frame, a first hook and a second frame, wherein a second hook is provided on the first frame. The first and second hooks are rotatably installed on the first frame, and the second frame capable of fixing the first hook and the first frame. Since the handle locking device is only be installable on a circuit breaker by mating between the first hook and a first installation part of the circuit breaker and mating between the second hook and a second installation part of the circuit breaker, an operator is prevented from unintentionally setting an “OFF” position of the handle locking device in an “ON” position of the circuit breaker during installation. The first hook is rotatably installed on the first frame, so that the handle locking device can be conveniently and rapidly installed on or demounted from the circuit breaker.