Patent ID: 8975990
Filing Date: 2015-03-10
Classification: H01H

Abstract:
1. A switching mechanism for an electrical switching device, comprising: an articulated mechanism, configured to move a movable contact; an operating lever, configured to manually open and close the movable contact via the articulated mechanism, the operating lever including a grip and a terminal link, pivotable about a fixed bearing point; a latch, rotatably mounted about a fixed latch spindle, including a clamping cam, an end of the latch cooperating with a latching element of the switching mechanism for latching and unlatching the latch on the latching element, the latch being in operative contact with the movable contact and configured to move the movable contact via the articulated mechanism; a tensioning roller, drivable via the operating lever such that, in the event of a movement of the operating lever, the operating lever is in operative contact with the latch by rolling along the clamping cam of the latch; a tensioning element, configured to tension the operating lever; a tripping mechanism, configured to move the latching element by being brought into operative contact therewith; a force element, disposed between the latching element and the tripping mechanism and configured to press apart the latching element and the tripping mechanism, wherein the force element is configured to exert a force on the latching element in a direction of an end of the latch, the latch including a bearing and a sliding block guide; and a rotary element, mounted on the bearing and guidable along the sliding block guide, wherein the rotary movement of the rotary element is restrictable by the sliding block guide, the rotary element being configured to be brought into operative contact firstly with the tensioning roller and secondly with the latching element and, upon conclusion of a tensioning operation of the operating lever, the rotary element being configured to hold the latch and the latching element in a loaded position, and the latch, the rotary element and the latching element being designed such that, during the tensioning operation of the operating lever, the rotary element is inserted into a recess of the latching element so that the latching element is movable in the direction of the end of the latch and away from the tripping mechanism so that, in the loaded position, a gap exists between the latching element and the tripping mechanism.