Mechanical latching unit for a main drive unit

The invention proposes a mechanical latching unit (100) for a main drive unit (5) with a rolling mechanical switch within housing (10), with a main roller (30), a counter roller (40), a carriage (50) and a carriage trip/locking lever (20), with a first joint created between the main roller (30) and the first end of the carriage (50), where by at least one guide bolt (52) at the second end of the carriage (50) engages in a guiding slot (11), where by the load (F6) of the traction link (6) of the main drive unit (5) carried out to the main roller (30) distributes to a primary force component (F40) carried out to counter roller (40) and a secondary force component (F60) carried out in direction to the second end of the carriage (50), where by a trip force is carried out to the guide bolt (52) in direction to the guiding slot (11) by the carriage trip/locking lever (20).