An internal trip structure of a circuit breaker

Abstract

The utility model discloses an inner trip structure of circuit breaker, which is installed in a shell and comprises: an electric operating mechanism including a driving source and a gear set, the driving source is matched with the gear set, and the gear set includes a plurality of gears matched with each other; one of the gears is an unlocking gear; an outer handle part is located outside the shell for user operation; the operating mechanism includes an inner handle, a trip and a lock catch, the inner handle is connected with the outer handle through a first U-shaped connecting rod to realize manual closing and closing of the operating mechanism; the inner handle is provided with a sector gear part, the sector gear part is engaged with an output gear to realize electric closing, and the sector gear part is disengaged from the output gear after electric closing; one end of an unlocking member is matched with the unlocking gear; the other end of the unlocking member is matched with the trip or the lock catch; rotation of the unlocking gear drives the unlocking member to move, so that the locking of the trip and the lock catch is released to realize electric opening; this structure can trip more quickly, improve breaking capacity, reduce the generation of electric arc and improve arc extinguishing effect.

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