Plug-in circuit breaker

A plug-in circuit breaker, comprising a circuit breaker housing, and a locking mechanism, an unlocking mechanism, a button mechanism and an operating mechanism all arranged inside said circuit breaker housing;

• said operating mechanism connected to said button mechanism, said button mechanism is operated to enable the circuit breaker to switch on/switch off by means of said operating mechanism;
• wherein
• said locking mechanism includes a first locking member with one end protruding outside said circuit breaker housing, and said circuit breaker housing includes a locking member opening co-operated with said first locking member,
• said unlocking mechanism includes a pulling member independent from said button mechanism and drivingly co-operated with said first locking member, when the circuit breaker is in a switch-off state, one end of said first locking member protrudes outside said circuit breaker housing from said locking member opening, and pulling said pulling member enables said first locking member to retract into the inside of said circuit breaker housing, wherein said circuit breaker housing is shaped as a hexahedral structure entirely, including a front side wall and a rear side wall arranged oppositely, wire-outlet holes, button holes and a pulling member operating hole all arranged on said front side wall, and wire-inlet holes arranged on said rear side wall.