| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a double-break circuit breaker having one pair of contact points that maintains contact pressure balance while making a movable contact generate a spring force directly without causing an increase in cost and poor breaking. <P>SOLUTION: A circuit breaker includes: a rotary movable contact; a power source side stationary contact and a load side stationary contact; a rotor that transmits a torque to the movable contact; and pull springs that are fixed onto the rotor to give contact pressure. The contact pressure of the movable contact is given by arranging coil parts of the pull springs on both sides in the axial direction of the rotary shaft of the movable contact and directly locking the hook onto a rib provided with the rotor. At least a pair of the set of pull springs is symmetrically arranged about the rotary shaft center of the movable contact. The movable contact is fitted into the rotor when the rotor is rotated by the opening/closing mechanism of the circuit breaker. <P>COPYRIGHT: (C)2013,JPO&INPIT |
