The coupling has a pivot-bearing body (14) pivoted about a pivot axis between operating and rest positions. Rotation-blocking bodies (54a - 54c) are disposed relative to an actuating body (52) such that reaction forces, which are directed transversely to the pivot axis and act on the actuating body cancels one another. The bodies are disposed around the actuating body and symmetrically in relation to a plane running perpendicularly to the pivot axis. A bearing for the actuating body is connected to a guide body. The guide body is formed as a pivot bearing for the pivot-bearing body.
