Patent ID: 8344274

Claim:
A position locking device for a draw-out circuit breaker, comprising: a rotatable screw rod, including one end driving a drag plate and including at least two key ways; a catching plate, including a catching plate hole and a protrusion inserted into the key ways, and connected to a fixing plate through a tension mechanism; a positioning plate, including one end inserted into the catching plate hole and the other end connected to the drag plate, such that the positioning plate is driven by the drag plate to travel, wherein at least two positioning notches are formed on a top surface of the positioning plate; and a push rod including having a restoring mechanism, including one end disposed on a panel of the circuit breaker and the other end passing through the catching plate hole, and including an inclined surface, wherein at a time of pushing the push rod from the end disposed on the panel along an axial direction, the inclined surface makes the catching plate travel along a direction in which the protrusion leaves the key ways; wherein the catching plate further comprises an outward protruding platform, and the catching plate hole further comprises a first inward protruding platform bearing against the top surface of the positioning plate and a second inward protruding platform bearing against the positioning notches of the positioning plate.