The invention relates to a safety belt retractor that has a two-spring comfort function, a belt shaft which is rotatably mounted in a housing and on which a safety belt can be wound, and at least two return springs that are spring-loaded in the winding direction of the belt and act between the housing and the belt shaft. The return springs being able to be connect by one end to the belt shaft or the housing by means of a shift device that shifts as a function of the extraction length of the safety belt.

In a webbing take-up device, in a state in which a stopper of a force limiter stopper mechanism has been brought into abutting contact with a stopper abutment portion resulting in rotation of a spool in a pull-out direction having become limited, the stopper is disposed on the inside of a flywheel hole portion of a flywheel body of a flywheel of a second force limiter mechanism. For this reason, deformation of the stopper outward in its radial direction can be suppressed by the flywheel body of the flywheel.

In a webbing take-up device, in a state in which a stopper of a force limiter stopper mechanism has been brought into abutting contact with a stopper abutment portion resulting in rotation of a spool in a pull-out direction having become limited, the stopper is disposed on the inside of a flywheel hole portion of a flywheel body of a flywheel of a second force limiter mechanism. For this reason, deformation of the stopper outward in its radial direction can be suppressed by the flywheel body of the flywheel.

Provided are a seat belt retractor and a seat belt device with which it is possible to improve an occupant-restraining property and energy absorption characteristics. A seat belt retractor 1 including a spool 2 that winds up a webbing W for restraining an occupant, a shaft 3 inserted through an axial center of the spool 2, and a locking base 4 connected to the shaft 3 and capable of switching between a rotating state and a non-rotating state, further includes an energy absorption device 5 capable of changing an energy absorption amount according to a relative rotation speed between the spool 2 and the shaft 3, and a load adjustment member 6 that blocks or reduces load transmission when a load equal to or greater than a threshold is applied to the shaft 3 or the spool 2. The spool 2, the shaft 3, the locking base 4, the energy absorption device 5, and the load adjustment member 6 are serially connected.

A seat belt device includes a belt reel around which webbing is wound, a winding spring that rotationally biases the belt reel in a winding direction, a motor that is configured to transmit a driving force to the belt reel, a clutch that is interposed between the motor and the belt reel, and which performs connection/disconnection of the motor and the belt reel, a webbing speed detection unit that detects the winding speed of the webbing, a fastened/released state detection unit that detects a fastened state and a released state of the webbing, a basic winding control unit that drives the motor in the winding direction in a rotating manner and puts the clutch into a connected state, and a speed increase correction unit that increases the speed of the motor with respect to the speed of the motor obtained by the control of the basic winding control unit.

A seat belt device includes a belt reel around which webbing is wound, a winding spring that rotationally biases the belt reel in a winding direction, a motor that is configured to transmit a driving force to the belt reel, a clutch that is interposed between the motor and the belt reel, and which performs connection/disconnection of the motor and the belt reel, a webbing speed detection unit that detects the winding speed of the webbing, a fastened/released state detection unit that detects a fastened state and a released state of the webbing, a basic winding control unit that drives the motor in the winding direction in a rotating manner and puts the clutch into a connected state, and a speed increase correction unit that increases the speed of the motor with respect to the speed of the motor obtained by the control of the basic winding control unit.

A seat monitoring system including one or more shoulder belt tension sensors and one or more buckle belt tension seniors configured to monitor the tension in a harness of a child safety seat. The seat monitoring system further includes a headrest position sensor for monitoring the position of a headrest. The seat monitoring system includes a motor for automatic tensioning of the shoulder belts and buckle belt. The seat monitoring system includes an I/O device for inputting child specifications. The I/O device includes a step-by-step guide for properly securing the child within the child safety seat.

A seat monitoring system including one or more shoulder belt tension sensors and one or more buckle belt tension seniors configured to monitor the tension in a harness of a child safety seat. The seat monitoring system further includes a headrest position sensor for monitoring the position of a headrest. The seat monitoring system includes a motor for automatic tensioning of the shoulder belts and buckle belt. The seat monitoring system includes an I/O device for inputting child specifications. The I/O device includes a step-by-step guide for properly securing the child within the child safety seat.

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.

A seatbelt retractor comprises a housing having a first end and a second end. The seatbelt retractor includes a spool having a first end and a second end each rotatably supported by the housing, the spool being elongated on an axis from the first end to the second end. The seatbelt retractor includes a torsion bar having a first end fixed to the first end of the spool and a second end operatively engaged with the housing. The torsion bar includes a wire elongated along the axis and connected to the first end of the torsion bar and the second end of the torsion bar.