Patent ID: 7623010
Filing Date: 2009-11-24
Classification: H01H

Abstract:
1. An electrical switch for connecting and breaking a circuit, comprising: a connecting and breaking mechanism to connect and break the circuit provided with at least a set of movable contacts and stationary contacts; an electromagnetism drive mechanism to control the movable and stationary contacts to be actuated so as to close the circuit; a housing to accommodate the movable contacts and stationary contacts; an arc-extinguishing mechanism disposed in the housing and corresponded to the movable and stationary contacts; a case connected to a base to accommodate the electromagnetism drive mechanism; a bedplate associated with the case; a movable bolt connected with the movable contacts; a movable iron core connected with the movable bolt to allow the movable bolt to move based on a movement of the movable iron core; and an electromagnetic holding mechanism disposed on the bedplate to hold the movable and stationary contacts to connect the circuit after the movable and stationary contacts are connected, wherein the holding mechanism has an electromagnetic iron, and one of a pothook or a baffle, wherein when the electromagnetic drive mechanism is powered on, the movable iron core is attracted so that the movable bolt is configured to be driven by the movable iron to move to a position, where the pothook hitches the movable bolt or the baffle rams the movable bolt, and the movable contacts move to contact with the stationary contacts, and then the electromagnetic iron of the holding mechanism is powered on to cause the pothook or the baffle to be attracted by the electromagnetic iron to further keep the movable and stationary contacts closed.