Contact switching device

摘要

An object of the present invention is to provide a contact switching device in which a short circuit contingent to flow-out of scattered objects caused by arc is eliminated, so that life durability is increased. For this, there is provided a contact switching device in which a movable iron core provided at one end portion of a movable shaft is attracted to a fixed iron core, based on excitation and degauss of an electromagnet portion, by which the movable shaft reciprocates in a shaft center direction, and movable contacts of a movable contact piece arranged at another end portion of the movable shaft contact and depart from fixed contacts. Particularly, contact surfaces between the fixed contacts and the movable contacts are arranged inside a box-shaped insulating member, and an opening portion of the insulating member is closed by a lid body having at least one extending portion in a direction of an arc generated between the fixed contacts and the movable contacts.

主权项

1. A contact switching device in which a movable iron core provided at one end portion of a movable shaft is attracted to a fixed iron core, based on excitation and degauss of an electromagnet portion, by which the movable shaft reciprocates in a shaft center direction, and movable contacts of a movable contact piece arranged at another end portion of the movable shaft contact and depart from fixed contacts, respectively,
wherein contact surfaces between the fixed contacts and the movable contacts are arranged inside a box-shaped insulating member, and an opening portion of the insulating member is closed by a plate, and a lid body is disposed along a lower surface of the plate facing the movable contacts, the lid body having at least one extending portion extending from the lid body in a direction parallel to the plate and laterally from a corner portion of the lid body, said extending portion configured to prevent scattered objects caused by an arc generated at a time of contact switching from flowing-out from the opening portion to an outside of the insulating member.