A belt retractor (40) having a belt reel (14), a seat belt (12) which can be wound thereon to form a belt reel, and at least one first assembly, the first assembly being arranged coaxially with the axis of rotation of the belt reel (14) and in series with the belt reel (14). The belt retractor is especially adapted for mounting inside the frame member of a motor vehicle seat.

In a seat belt retractor (12) for a vehicle, comprising a frame (14) in which a belt reel (10) is supported which includes a reel body (26) as wed as a first flange (32) and a second flange (34), said flanges being provided at the axial ends (28, 30) of the reel body (26) and each being arranged in a seat (22) of the frame (14), wherein the first flange (32) is rotatable relative to the reel body (26) and wherein between the first flange (32) and the reel body (26) a force limiter is provided, and at the seat (22) locking teeth (24) are provided and at the first flange (32) a toothing corresponding to the locking teeth is provided, the second flange (34) is rotatable relative to the reel body (26) and at the second flange (34) and/or at the reel body (26) interacting stops (50, 54, 58) are provided for limiting rotation of the second flange (34) relative to the reel body (26). Furthermore, the second flange (34) Includes a peripheral wall (44) which encloses the axial end (30) of the reel body (26) facing the second flange (34) in the peripheral direction.

The present disclosure presents a webbing take-up device, which comprises: a spool; a lock section that is restricted from rotating at a time of a vehicle emergency so as to limit rotation of the spool in the pull-out direction; a force limiter mechanism that permits rotation of the spool in the pull-out direction at a force limiter load or greater when rotation of the spool in the pull-out direction with respect to the lock section is being limited; a switching member that switches a load value of the force limiter load by switching between a rotation-restricted state and a rotation-enabled state; and a mounting member that includes a switching member mounting section at which the switching member is disposed, and a restriction section that is engaged with the switching member so as to restrict displacement of the switching member disposed at the switching member mounting section.

The invention relates to a belt retractor for a seat belt of a motor vehicle, comprising a belt shaft which is rotatably mounted in a housing frame, a profiled head which can be locked relative to the housing frame, and a force-limiting device, wherein the force-limiting device is coupled on the one hand to the profiled head and on the other hand to the belt shaft and wherein the force-limiting device allows a force-limited rotation of the belt shaft relative to the locked profiled head, characterized by an actively releasable decoupling device.

A winding drum used for winding a safety belt extends in the axial direction and is rotatably supported in a frame of a retractor. A gear mechanism is installed at one side of the winding drum through a force limiting mechanism and comprises a stop wheel and a ball gear which are riveted and fixedly connected in the axial direction. The stop wheel is rotatably installed on the frame, and the ball gear comprises a penetrating shaft hole. The force limiting mechanism is inserted into the shaft hole in the axial direction and both ends of the force limiting mechanism are respectively connected with the winding drum and the gear mechanism to prevent passengers from being excessively restrained by realizing the force limiting function. The gear mechanism and the force limiting mechanism are directly assembled to the winding drum, with simple steps and few independent components.

An increase in structural complexity is suppressed in a webbing take-up device provided with a force limiter load switching mechanism and a pre-tensioner mechanism. The webbing take-up device includes a spool that takes up a webbing, a pre-tensioner mechanism that takes up the webbing onto the spool by rotating the spool in the take-up direction in a vehicle emergency, and a lock mechanism that restricts pull-out direction rotation of the spool in a vehicle emergency. The webbing take-up device further includes a force limiter mechanism that permits pull-out direction rotation of the spool at a force limiter load or greater when the lock mechanism has restricted pull-out direction rotation of the spool, and a force limiter load switching mechanism that switches a force limiter load value by being input with a portion of an actuation force that actuates the pre-tensioner mechanism.

A safety belt arrangement for a vehicle, with a belt force limiting unit which is constructed as a piston/cylinder assembly having a piston tube and a piston, which in the event of the belt force being limited is displaceable by a force limiting path in the piston tube, while expanding and plastically deforming the latter, whereby the belt force exerted on a vehicle occupant is limited to a predefined level of force. According to the invention, at least one tube element, which can be pushed telescopically onto the piston tube to form a double tube structure, is provided for setting the force level course over the force limiting path.

In a webbing take-up device, an angle from one end portion toward another end portion of a second clutch spring in a direction of winding of a coil portion from the one end portion toward the another end portion of the second clutch spring is 270. Therefore, in a case in which the one end portion of the second clutch spring is rotated toward a side of the direction of the winding of the coil portion, one end side portion of the second clutch spring is displaced so as to bulge-out toward a side opposite to a side toward which another end side portion bulges-out.

A seat belt system for protecting an occupant of a vehicle, the system having seat belt webbing connected to a seat belt retractor that includes (a) a frame; (b) a spool with the seat belt webbing wound around, wherein the spool is rotatably mounted to the frame and configured to rotate in a webbing extraction direction and a webbing retraction direction; (c) an energy absorbing device for absorbing energy when the spool is rotated in the webbing extraction direction after an emergency event has occurred; and (d) a mechanism for selectively cancelling the operation of the energy absorbing device by preventing motion of the spool in the webbing extraction direction.

A seatbelt retractor includes a housing and a spool rotatably supported by the housing. A torsion bar has a first end and a second end. The first end of the torsion bar is fixed to the spool, and the second end of the torsion bar is fixable relative to the housing. The seatbelt retractor includes a magnet and a rotor disposed adjacent the magnet. One of the magnet and the rotor being fixed relative to the spool and the other of the magnet and the rotor being rotatable relative to the spool. The rotor includes a conductive material.