A seat belt retractor that includes a torsion bar is positioned in a spool. The second end of the torsion bar is engaged with a locking mechanism mounted to the frame. The torsion bar is configured to be locked at the second end while the first end rotates with the spool so that the torsion bar deforms to absorb force. The locking mechanism includes a lock base and a locking hub that is mounted to the second end of the torsion bar and is releasably connected to the lock base to prevent the second end of the torsion bar from rotating. The locking hub is configured to be released and rotate relative to the lock base to thereby permit rotation of the second end of the torsion bar with the first end of the torsion bar and the spool.

A seat belt retractor that includes a torsion bar is positioned in a spool. The second end of the torsion bar is engaged with a locking mechanism mounted to the frame. The torsion bar is configured to be locked at the second end while the first end rotates with the spool so that the torsion bar deforms to absorb force. The locking mechanism includes a lock base and a locking hub that is mounted to the second end of the torsion bar and is releasably connected to the lock base to prevent the second end of the torsion bar from rotating. The locking hub is configured to be released and rotate relative to the lock base to thereby permit rotation of the second end of the torsion bar with the first end of the torsion bar and the spool.

In a belt retractor (10) comprising a frame (12), a sensor (16) for vehicle-sensitive blocking including a sensor lever (22), a belt reel (14) and a rocker arm (30) coupled to the belt reel (14) via a coupling (32) which is adjustable between a home position in which the sensor lever (22) is blocked and an extended position in which the sensor lever (22) is released, the coupling (32) is a wrap spring coupling comprising a drive element (34) coupled to the belt reel (14) as well as a driven element (40) connected to the rocker arm (30), wherein the drive element (34) and the driven element (40) include a respective annular outer friction surface (38, 44) and are arranged concentrically to each other and a coil spring (46) is provided which contacts the friction surfaces (38, 44) and couples the driven element (40) to the drive element (34).

In a belt retractor (10) comprising a frame (12), a sensor (16) for vehicle-sensitive blocking including a sensor lever (22), a belt reel (14) and a rocker arm (30) coupled to the belt reel (14) via a coupling (32) which is adjustable between a home position in which the sensor lever (22) is blocked and an extended position in which the sensor lever (22) is released, the coupling (32) is a wrap spring coupling comprising a drive element (34) coupled to the belt reel (14) as well as a driven element (40) connected to the rocker arm (30), wherein the drive element (34) and the driven element (40) include a respective annular outer friction surface (38, 44) and are arranged concentrically to each other and a coil spring (46) is provided which contacts the friction surfaces (38, 44) and couples the driven element (40) to the drive element (34).

A seat belt retractor with a belt shaft rotatably supported in a frame for winding up a seat belt. A blocking device blocks the belt shaft in the winding off direction. A control disk (1) is spring-loaded in the direction of winding up and with a cogging (2). A sensor device (3) with an inertia mass (4) and a blocking lever (5) can be deflected by deflecting the inertia mass (4), which blocks the control disk (1) upon an exceeding of a predetermined vehicle delay by deflecting the inertia mass (4) and with an engagement of the blocking lever (5) into the cogging (2) of the control disk (1) opposite the belt shaft in the direction of withdrawing the belt and controls the blocking device. A counter gear unit (6) is driven by the rotary movement of the belt shaft, and a first switching device (7) is activated by the counter gear unit (6) and blocks the control disk (1) after a first predetermined belt webbing withdrawal length (A) and frees it again after a second predetermined belt webbing intake length (B). A second switching device (8) is activated by the counter gear unit (6) and fixes the blocking lever (5) after a predetermined belt webbing intake length (C) in a non-engagement position into the cogging (2) of the control disk (1). The first switching device (7) and the second switching device (8) are activated during the belt webbing intake movement in the second predetermined belt band webbing intake length (B).

A seat belt retractor with a belt shaft rotatably supported in a frame for winding up a seat belt. A blocking device blocks the belt shaft in the winding off direction. A control disk (1) is spring-loaded in the direction of winding up and with a cogging (2). A sensor device (3) with an inertia mass (4) and a blocking lever (5) can be deflected by deflecting the inertia mass (4), which blocks the control disk (1) upon an exceeding of a predetermined vehicle delay by deflecting the inertia mass (4) and with an engagement of the blocking lever (5) into the cogging (2) of the control disk (1) opposite the belt shaft in the direction of withdrawing the belt and controls the blocking device. A counter gear unit (6) is driven by the rotary movement of the belt shaft, and a first switching device (7) is activated by the counter gear unit (6) and blocks the control disk (1) after a first predetermined belt webbing withdrawal length (A) and frees it again after a second predetermined belt webbing intake length (B). A second switching device (8) is activated by the counter gear unit (6) and fixes the blocking lever (5) after a predetermined belt webbing intake length (C) in a non-engagement position into the cogging (2) of the control disk (1). The first switching device (7) and the second switching device (8) are activated during the belt webbing intake movement in the second predetermined belt band webbing intake length (B).

A control device for a seat belt of a vehicle includes a retracting unit configured to retract the seat belt, a departure detection unit configured to detect a departure of the vehicle from a lane; a vehicle speed sensor configured to measure a vehicle speed; and an electronic control unit configured to operate the retracting unit when both a first condition and a second condition are satisfied. The first condition is a condition that the departure detection unit detects the departure of the vehicle from the lane, and the second condition is a condition that the vehicle speed is equal to or higher than a prescribed speed, and the electronic control unit is configured not to operate the retracting unit when the first condition is satisfied and the second condition is not satisfied.

A control device for a seat belt of a vehicle includes a retracting unit configured to retract the seat belt, a departure detection unit configured to detect a departure of the vehicle from a lane; a vehicle speed sensor configured to measure a vehicle speed; and an electronic control unit configured to operate the retracting unit when both a first condition and a second condition are satisfied. The first condition is a condition that the departure detection unit detects the departure of the vehicle from the lane, and the second condition is a condition that the vehicle speed is equal to or higher than a prescribed speed, and the electronic control unit is configured not to operate the retracting unit when the first condition is satisfied and the second condition is not satisfied.

A motor vehicle belt restraint system combining a three-point active seatbelt system with a two-point seatbelt system. The webbing of the three-point seatbelt is allowed to slide through a latch plate releasably attached to a seatbelt buckle. The webbing of the two-point belt system is affixed to the latch plate. When in use, the belt systems combine to provide two lap belt segments extending across the lower torso of a vehicle seat occupant with a single diagonal shoulder belt section. Additional embodiments incorporate the use of an anchor mechanism for the three-point belt system having additional capabilities including a webbing release and a load limiting function. Further embodiments provide different arrangements for the two lap belt sections.

A belt retractor for a motor vehicle seat belt device, with a rotatably mounted belt reel onto which a seat belt is wound, and a belt tensioner with a drive wheel (1), which drives the belt reel in the event of an activation. A positively controlled tensioner coupling transfers the drive movement from the drive wheel (1) onto the belt reel. At least one coupling pawl (2,3) mounted on the drive wheel (1) and which is moved into and out of engagement with a toothing (20) rotationally fixed in relation to the belt reel to establish and disconnect a rotational connection of the drive wheel (1) with the belt reel. A friction ring (4) has a control arm (11) coupled with the coupling pawl (2,3), wherein in the event of an activation of the belt tensioner, the friction ring (4) performs a relative movement to the drive wheel (1) by frictional forces and, controls via the control arm (11) the movement of the coupling pawl (2,3) into engagement and disengagement with the toothing (20). The friction ring (4) and/or the coupling pawl (2,3) has a blocking contour (12), positioned such that the coupling pawl (2,3) abuts thereon after the disengaging movement out of the toothing (20) and is blocked in the direction of a repeated engagement movement into the toothing (20).