A spool 20 and a locking base 40 are connected through a torsion bar 70. A stop gear 82 and a positioning member 86 are engaged through threads with the male thread 42c of a locking base 40 so as to be separated from each other a predetermined distance. The locking base 40 and the torsion bar 70 are mounted to the spool 20 while the distance of separation between the stop gear 82 and the positioning member 86 is accurately set to a specified distance. When the tension of webbing increases due to the movement of a vehicle occupant in a vehicle collision and provides the torsion bar 70 with EA rotation while twisting the torsion bar 70, the stop gear 82 advances toward the positioning member 86 and comes into contact therewith.

A seatbelt retractor includes: a housing; a winding drum configured to wind a webbing and rotatable in a winding direction and a pull-out direction of the webbing; a lock member coupled to the winding drum to be not rotatable relative to the winding drum when a force for pulling out the webbing is less than a predetermined value and to be rotatable relative to the winding drum when the force exceeds the predetermined value; an impact energy absorber provided between the winding drum and the lock member and configured to absorb impact energy by relative rotation between the winding drum and the lock member; and a bush made of resin. The lock member includes a tubular shaft support portion, and the winding drum includes a protrusion disposed inside the shaft support portion. The bush made of resin is provided between the shaft support portion and the protrusion.

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.

For a vehicle seat, for instance an aircraft passenger seat, a seat belt system including a seat belt reel having a rotating shaft, a seat belt wound on the rotating shaft, and a lock for locking at least one of the rotating shaft and the seat belt. At least one sensor is operative to output a signal when a sensed parameter exceeds a predetermined magnitude threshold. An activation device is operative to activate the lock. A time delay device electrically coupled to the at least one sensor and the activation device is operative to, upon receiving the signal output by the at least one sensor, activate the activation device upon completion of a time delay after receiving the signal output by the at least one sensor. Further embodiments include shoulder belts forming loops allowing a predetermined amount of forward travel prior to restraining a passenger.

The invention relates to a belt retractor surrounding a belt reel which is rotatably mounted in a frame, and comprising a force-limiting device with at least one plastically deformable first torsion rod, wherein the first torsion rod has a first end rotationally fixed to the belt reel and a second end rotationally fixed to a profiled head which can be blocked via a first blocking device in a fixed manner relative to the vehicle. The belt reel, the first torsion rod and the profiled head are arranged coaxially to one another and in series relative to one another.

A belt retractor comprises a frame (10), a belt reel (12) rotatably arranged in the frame (10) and having a first end (16) and an opposite second end (17) as well as comprising a blocking mechanism (18) arranged at an end face of the belt reel (12) by which the belt reel (12) can be blocked within the frame (10). The belt retractor further comprises an axially extending first load limiter which is releasably coupled to the belt reel (12) by means of a disconnecting clutch (24), a second load limiter which is coupled to be rotationally fixed to the first load limiter or a hub, and a third load limiter which can be coupled to be rotationally fixed to the belt reel (12) by means of a connecting clutch (38). Moreover, a method for controlling such belt retractor is provided.

A webbing retractor includes a spool, a motor, a force limiter mechanism, a first rotating body, a second rotating body, a ratchet gear, a pawl body and a control section. The ratchet gear is provided at one of the first rotating body or the second rotating body. The pawl body is provided at another of the first rotating body or the second rotating body. The pawl body can engage with the ratchet gear in a case in which the first rotating body rotates toward one side, and engagement of the pawl body with the ratchet gear being cancelled in a case in which the first rotating body rotates toward another side. The control section drives the motor to rotate in reverse, such that the first rotating body rotates toward another side in a case in which a physical amount relating to load of the passenger exceeds a predetermined value during forward rotational driving.

The invention relates to a belt retractor comprising a frame (10), a belt reel (12) rotatably arranged within the frame, a blocking mechanism (18) by which the belt reel (12) can be blocked within the frame (10), and a load limiter (14) which is detachably coupled to the belt reel (12), characterized in that for coupling the load limiter (14) at least one load-transmitting bar (28) is used which is arranged at the belt reel (12) and is retained in a coupling position by a support ring (32), wherein the support ring (32) can be moved from a supporting position to a release position by means of an actor (70).

A safety belt retractor having a load limiting device is provided. The load limiting device comprises: a hollow spool (1) on which a webbing can be wound, a locking disk (2) having a flange (21) and a sleeve (22) attached thereto, and a torsion bar (3); the locking disk (2) can be mounted with the flange (21) on an end of the spool (1) and can extend with the sleeve (22) into a hollow chamber of the spool (1), and the spool (1) is rotatable in relation to the locking disk (2); the torsion bar (3) can be arranged in the hollow chamber of the spool (1) and is fixed on the spool (1) and on the locking disk (2) in a rotationally secured manner. The load limiting device further comprises a load limiting ring (5) with a thread (51) on the inner circumference, the load limiting ring (5) can be rotated around the sleeve (22) with the rotation of the spool (1), and the sleeve (22) is provided on its outer circumference with an engaging section (221) and with a resistance part for applying a resistance to the load limiting ring (5), the sleeve (22) having in the engaging section (221) a mating thread which matches with the thread (51) of the load limiting ring (5) and the resistance part being arranged downstream of the engaging section (221) in the axial displacement direction of the load limiting ring (5).

In a webbing retractor, due to a moving member being moved toward an axial direction distal end side, and first teeth and second teeth of a rotating member piercing the moving member, the rotating member is rotated in a take-up direction. Here, at the moving member, a sectional surface area, in a direction orthogonal to an axis, of a small diameter portion that is at an axial direction distal end side is made to be small as compared with a moving member main body that is at an axial direction proximal end side. Therefore, resistance to movement of the moving member can be reduced.