Patent ID: 9275811
Filing Date: 2016-03-01
CPC Classification: H01H

Claim Text:
1. A switching unit for an electrical switching device, comprising: a switching mechanism, configured to connect and separate at least one moving contact from at least one fixed contact of the electrical switching device, the switching mechanism including a tensioning lever, at least one rocker moveably mounted on the tensioning lever and a hinge mechanism for moving the moving contact, the tensioning lever being actively connected to the moving contact to move the moving contact by way of the hinge mechanism; a pawl configured to latch and unlatch the tensioning lever; a switching lever configured to manually connect and separate the moving contact via the switching mechanism, the switching lever being manually or automatically pivotable between a TRIP position and a RESET position; a tensioning roller, drivable by way of the switching lever such that, when the switching lever is moved, the tensioning roller is actively connected to the tensioning lever in order to pivot the tensioning lever by rolling along a tensioning contour of the tensioning lever; a tripping mechanism, actively connected in a detachable manner to a pawl contact surface of the pawl via at least one tripping contact surface of the tripping mechanism in the TRIP position (T) of the switching unit; and a pawl spring, arranged between the pawl and the tripping mechanism, configured to tension the pawl and the tripping mechanism at least in the TRIP position, the pawl and the pawl spring being embodied such that, when the switching lever is moved into the TRIP position, the pawl spring is bent by contact with a lateral face of the pawl.