A seat belt retractor for use with a seat belt webbing includes a spindle, a tread head part, a torsion bar, a stop nut and an energy management element. The spindle is configured for winding the seat belt webbing around the spindle. The tread head part is configured for having a locked condition or a free condition. The torsion bar is engaged with the spindle and the tread head part and configured to deflect torsionally by allowing relative rotation between the spindle and the tread head part when the tread head part is in the locked condition. The stop nut is operatively coupled with the tread head part and the spindle and configured to move in axial direction. Furthermore, the energy management element placed between the stop nut and the tread head part is configured to be deformed by the axial movement of the stop nut.

In this webbing take-up device, a first bend portion, a second bend portion, and a third bend portion are formed in a wire. In an initial state of the wire, the wire is supported by a second squeezing portion by being abutted against the second squeezing portion on a base end side in the longitudinal direction thereof from the second bend portion, and is supported by a third squeezing portion by being abutted against the third squeezing portion on a base end side in the longitudinal direction thereof from the third bend portion. As a result, the timings when the wire starts to be squeezed by each one of a first squeezing portion, the second squeezing portion, and the third squeezing portion can each be mutually offset.

A seat belt retractor for use with a seat belt webbing includes a spindle, a tread head part, a torsion bar, a stop nut and an energy management element. The spindle is configured for winding the seat belt webbing around the spindle. The tread head part is configured for having a locked condition or a free condition. The torsion bar is engaged with the spindle and the tread head part and configured to deflect torsionally by allowing relative rotation between the spindle and the tread head part when the tread head part is in the locked condition. The stop nut is operatively coupled with the tread head part and the spindle and configured to move in axial direction. Furthermore, the energy management element placed between the stop nut and the tread head part is configured to be deformed by the axial movement of the stop nut.

A safety belt automatic adjustment apparatus includes a safety belt buckle fastening assembly, a safety belt retractor and a linking component. The safety belt buckle fastening assembly is rotatably connected to a seat body of a child safety seat and for connecting with a safety belt buckle. The safety belt retractor is used for retracting a safety belt, and the safety belt retractor includes a restraining assembly for restraining a movement of the safety belt in a predetermined direction. The linking component is installed between the safety belt buckle fastening assembly and the safety belt retractor, and the safety belt buckle fastening assembly rotates to drive the linking component and the restraining assembly, so as to restrain or release the safety belt winding around the safety belt retractor. The safety belt automatic adjustment apparatus has advantages of automatic adjustment for the safety belt, simple structure, convenient operation and enhanced safety.

A seatbelt retractor includes a base, a spool, a cylinder and a cylinder lock. The spool is rotatably coupled to the base and has a piston portion. The cylinder is engaged with the piston portion and therewith defines a first chamber. The piston portion is movable from a first position yielding a first chamber volume to a second position yielding a second chamber volume. The cylinder lock in a first condition rotatably fixes the cylinder to the base. Damping fluid is disposed in the chamber.

A system includes a sensor, a controller, and a seatbelt retractor. The controller is programmed to receive a signal from the sensor indicating detection of a vehicle front oblique impact. The seatbelt retractor includes a load limiting mechanism selectively releasable from a high load mode to a low load mode. The controller is programmed to release the load limiting mechanism from the high load mode to the low load mode at a predetermined time in response to a signal from the sensor indicating a vehicle front oblique impact.

A serrated portion is formed on an outer peripheral portion of a lock base body of a lock base of a webbing take-up device. Furthermore, a flange portion is formed on the outer peripheral portion of the lock base body. The flange portion is disposed on a vehicle front side with respect to the serrated portion. Triangular grooves of the serrated portion are closed by the flange portion. When the lock base becomes displaced in a vehicle rearward direction and the flange portion comes into abutting contact with a leg plate of a frame, further displacement of the lock base in the vehicle rearward direction is blocked. Due to this, engagement between the serrated portion and ratchet teeth of a ratchet hole in the leg plate can be maintained.

A seatbelt retractor includes a spool, a piston, and a cylinder. The spool is rotatably coupled to a base by a piston and a cylinder. The piston is fixed to one of the base and the spool. The cylinder receives the piston and is fixed to the other of the base and the spool. A cutter is disposed between and fixed to one of the piston and the cylinder. The cutter is in engagement with the other of the piston and the cylinder.

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.

A vehicle includes a seatbelt retractor including a housing and a spool rotatably supported by the housing. The seatbelt retractor includes a load limiter fixed to the spool and lockable with the housing. The load limiter has a first coupling and a second coupling spaced from the first coupling on the rotational axis. The first coupling has a first energy absorber retained in a first cavity. The first energy absorber is compressible relative to a first male segment and a first female segment of the coupling. The second coupling has a second energy absorber retained in a second cavity. The second energy absorber is compressible relative to a second male segment and a second female segment of the second coupling.