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AssigneeSchaltbau GmbH
InventorsKorbinian Kreuzpointner, Andrej Ignatov, Martin Geschke
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Disclosed is a switching device having an electromagnetic actuation device for driving a movable contact, which actuation device has an excitation coil for generating a magnetic field, a magnetic yoke for amplifying the flux density of the magnetic field, and a magnet armature which can be pulled from a starting position to a pulled position by the magnetic field and which is connected to the movable contact. The actuation device includes a locking element which at least partly consists of a ferromagnetic material and is arranged such that by virtue of the effect of the magnetic field, the locking element is brought from the unlocking position to the locking position. The magnetic yoke is designed to have a discontinuity when the locking element is in the locking position, and the discontinuity of the magnetic yoke is closed by the locking element when the locking element is in the unlocking position.
Switching device (1) comprising at least one stationary contact (2) and a movable contact (3) cooperating therewith, and comprising an electromagnetic actuation device for driving the movable contact (3), wherein the electromagnetic actuation device comprises an excitation coil (4) for generating a magnetic field, a magnetic yoke (5, 5.1, 5.2, 7) for amplifying the flux density of the magnetic field, and a magnet armature (6) configured to be pulled by the magnetic field from an starting position to a pulled position and connected to the movable contact (3), wherein the electromagnetic actuation device further comprises a locking element (7) movable from a locking position, in which the locking element (7) prevents movement of the magnet armature (6) and/or the movable contact (3), into an unlocking position, in which the locking element (7) releases a movement of the magnet armature (6) and/or of the movable contact (3), and wherein the locking element (7) consists at least partially of a ferromagnetic material and is configured so as to be transferred from the unlocking position into the locking position due to the action of the magnetic field, characterized in that the magnetic yoke (5, 5.1, 5.2, 7) is configured such that the magnetic yoke has a discontinuity when the locking element (7) is in the locking position, the discontinuity of the magnetic yoke being closed by the locking element (7) when the locking element (7) is in the unlocking position.
Dependencies are inferred from the claim text.