Patent ID: 8124901
Filing Date: 2012-02-28
Classification: H01H

Abstract:
1. An energy storage mechanism for a switching device, comprising: a main gear that has a closing cam for performing closing of a contact of the switching device and a crank portion connected with a closing spring, that is rotated by an energy storage motor or manually, that is rotated by restoration force exerted by the closing spring in the same direction as the closing spring is energized through an action of the crank portion, and that makes the switching device perform closing operation through an action of the closing cam, the main gear including a gear A all the teeth of which are sound and a gear B having a missing-tooth portion that are integrally assembled in such a way that all the teeth of the gear A and all the teeth of the gear B are in phase; an output gear that is rotated through an output shaft that is driven by the energy storage motor or manually; an intermediate gear that is engaged with the output gear as well as the gear B and whose rotation axle is supported in a rotation direction of the main gear by an elongated hole provided on the circumference of a circle with respect to the output shaft; and a reverse rotation prevention mechanism for the main gear, wherein, in the case where the closing spring is energized, the main gear is rotated by the energy storage motor or manually, via the output gear and the intermediate gear; in the case where the closing spring has been energized, the engagement between the intermediate gear and the main gear is released at the missing-tooth portion of the gear B; in the case where the switching device is closed, the main gear is rotated by restoration force exerted by the closing spring, and the intermediate gear is separated from the main gear due to the elongated hole that supports the rotation axle thereof; and in the case where the closing spring is energized again, the intermediate gear is again engaged with the main gear due to the elongated hole that supports the rotation axle thereof.