In a vehicle emergency, rotation of a lock base in a pull-out direction opposite to a take-up direction is restricted. A first pinion-configuring portion formed at an outer circumferential portion of the lock base configures one width direction side of a pinion section that is rotated in the take-up direction by a rack that moves due to fluid pressure in a vehicle emergency. A coupling member disposed between the lock base and the torsion shaft is fixed to the lock base and to a torsion shaft. A second pinion-configuring portion that configures a width direction other side of the pinion section is formed alongside the first pinion-configuring portion at an outer circumferential portion of the coupling member.

A self-locking seat belt retractor includes a blocking system for a seat belt winding shaft that is actuated in an at least vehicle-sensitive manner, in which, in the event of triggering, a sensor mass mounted in a vehicle-sensitive manner moves a locking lever with its engagement tip into a trigger position in engagement with the toothing of a control disk, as the result of which the control disk in its joint rotational motion with the belt winding shaft is stopped and the blocking system is activated. The sensor mass is situated in a support part on a contact surface, and when vehicle accelerations occur the sensor mass in the support part is movable on the contact surface by inertial control from a neutral position into the trigger position. The support part together with the sensor mass situated therein is situated in a housing that includes the control disk. The housing with the support part and the sensor mass situated therein is fixable on the seat belt retractor in various rotational angle positions with respect to the control disk.

A self-locking seat belt retractor includes a blocking system for a seat belt winding shaft that is actuated in an at least vehicle-sensitive manner, in which, in the event of triggering, a sensor mass mounted in a vehicle-sensitive manner moves a locking lever with its engagement tip into a trigger position in engagement with the toothing of a control disk, as the result of which the control disk in its joint rotational motion with the belt winding shaft is stopped and the blocking system is activated. The sensor mass is situated in a support part on a contact surface, and when vehicle accelerations occur the sensor mass in the support part is movable on the contact surface by inertial control from a neutral position into the trigger position. The support part together with the sensor mass situated therein is situated in a housing that includes the control disk. The housing with the support part and the sensor mass situated therein is fixable on the seat belt retractor in various rotational angle positions with respect to the control disk.

Provided are a seat belt retractor and a seat belt device with which it is possible to improve energy absorption characteristics and a restraining property. The seat belt retractor includes a spool that performs winding of a webbing for restraining an occupant, a shaft inserted through an axial center of the spool, and a locking base connected to the shaft and capable of switching between a rotating state and a non-rotating state. The seat belt retractor further includes a load adjustment member disposed between the shaft and the locking base and that blocks or reduces load transmission in a case where a load equal to or greater than a threshold is applied to the shaft, and an energy absorption device disposed between the spool and the locking base and capable of changing an energy absorption amount according to a relative rotation speed between the spool and the locking base. The energy absorption device is connected in parallel with the load adjustment member.

Sealed web retractors and associated systems and methods for retracting a web, such as seat belt web, are disclosed herein. In one embodiment, a web retractor includes a frame having a sidewall with a first opening, a locking assembly attached to the frame and having a housing with a second opening adjacent to the first opening, and a shaft coupler rotatably and sealably carried by the sidewall. The shaft coupler operably couples a spool shaft to the locking assembly through the first and second openings. At least one seal is operably positioned in the first opening between the shaft coupler and the sidewall.

Sealed web retractors and associated systems and methods for retracting a web, such as seat belt web, are disclosed herein. In one embodiment, a web retractor includes a frame having a sidewall with a first opening, a locking assembly attached to the frame and having a housing with a second opening adjacent to the first opening, and a shaft coupler rotatably and sealably carried by the sidewall. The shaft coupler operably couples a spool shaft to the locking assembly through the first and second openings. At least one seal is operably positioned in the first opening between the shaft coupler and the sidewall.

Variable behaviour control mechanism with a variety of motion characteristics, the mechanism comprising means to measure a plurality of motion characteristics and to activate systems when a threshold of the motion characteristics is reached. The mechanism described is, for example, a vehicle seat belt and the mechanism minimises or prevents unwanted activation of line extension or retraction of the seat belt. A first mechanism is described where activation occurs between at least one primary system and at least one secondary system when a combination of the sensed motion characteristics achieves a threshold. A second mechanism is described where activation occurs between at least one primary system and at least one secondary system when at least one sensed motion characteristic achieves a threshold, the threshold being modified based on at least one further motion characteristic. A method of use of the above mechanisms is also described.

Variable behaviour control mechanism with a variety of motion characteristics, the mechanism comprising means to measure a plurality of motion characteristics and to activate systems when a threshold of the motion characteristics is reached. The mechanism described is, for example, a vehicle seat belt and the mechanism minimises or prevents unwanted activation of line extension or retraction of the seat belt. A first mechanism is described where activation occurs between at least one primary system and at least one secondary system when a combination of the sensed motion characteristics achieves a threshold. A second mechanism is described where activation occurs between at least one primary system and at least one secondary system when at least one sensed motion characteristic achieves a threshold, the threshold being modified based on at least one further motion characteristic. A method of use of the above mechanisms is also described.

In a seatbelt device, when paying out webbing from a spool of a webbing take-up device to fit the webbing over the body of an occupant, drive of a first motor of the webbing take-up device is controlled based on the magnitude of a signal level of a load detection signal output by a load sensor according to the physical build of the occupant, and pulse data stored in a storage unit corresponding to each signal level of the load detection signal.

In a seatbelt device, when paying out webbing from a spool of a webbing take-up device to fit the webbing over the body of an occupant, drive of a first motor of the webbing take-up device is controlled based on the magnitude of a signal level of a load detection signal output by a load sensor according to the physical build of the occupant, and pulse data stored in a storage unit corresponding to each signal level of the load detection signal.