Patent ID: 7341290

Claim:
Lock for doors or hatches of vehicles, with a permanently supported rotary catch ( 20 ), into which a locking part ( 10 ) travels when the door or hatch is closed, thus pivoting the rotary catch ( 20 ) from an initial open position into a pre-latching position ( 20 . 1 ); where the rotary catch ( 20 ) is spring-loaded ( 25 ) in the direction toward its open position; with a permanently supported, spring-loaded ( 35 ) pawl ( 30 ), which, when the catch is in the pre-latching position ( 20 . 1 ), engages with a preliminary notch ( 21 ) in the rotary catch ( 20 ); with a motorized ( 52 ) closing assist mechanism for the door or hatch, comprising a gearbox ( 53 ) with a cam ( 50 ); with control means for turning the motor ( 52 ) on and off; where, when the motor is turned on, the movement ( 55 ) of the cam ( 50 ) moves the rotary catch ( 20 ) from the pre-latching position ( 20 . 1 ) to the main latching position ( 20 . 3 ), which is secured by the pawl ( 30 ), which engages with the main notch ( 22 ) of the rotary catch ( 20 ), wherein a pair of toggle-joint levers ( 40 ) and a spring-loaded driver ( 33 ) are installed between the cam ( 50 ) and the rotary catch ( 20 ); in that the driver ( 33 ) is hinged to the free end ( 42 ) of the toggle-joint lever pair ( 40 ), and the driver ( 33 ) is held by spring-loading ( 37 ) against a stationary end surface ( 18 ), at least when the rotary catch ( 20 ) is in the pre-latching position ( 20 . 1 ); in that the free end ( 42 ) of the toggle-joint lever pair ( 40 ) is positively guided by guide means ( 15 ) in the lock housing ( 11 ), whereas the other, fixed end ( 41 ) of the toggle-joint lever pair ( 40 ) is rotatably mounted on a stationary bearing ( 14 ); in that the cam ( 50 ) has a control curve ( 51 ), against which the toggle-joint lever pair ( 40 ) is held; and in that the driver ( 33 ) has a shoulder ( 34 ), which, when the catch is in the open position, is a certain distance away ( 36 ) from an opposing shoulder ( 24 ) provided on the rotary catch ( 20 ), whereas, during the motorized ( 52 ) closing movement, the toggle-joint lever pair ( 40 ) extends ( 40 . 2 ) or inflects ( 40 . 1 ), as a result of which the shoulder ( 34 ) of the driver ( 33 ) grips the opposing shoulder ( 24 ) of the rotary catch ( 20 ) and rotates the rotary catch ( 20 ) from its pre-latching position ( 20 . 1 ) to the main latching position ( 20 . 3 ).