Abstract: An air bag cover structure comprising an air bag cover main body and an insert member. The air bag cover main body has an upper wall portion, a bag body which inflates toward a vehicle occupant when a vehicle suddenly decelerates being accommodated between the upper wall portion and a base plate, the upper wall portion being pushed by the bag body, which is expanding, so that the upper wall portion unfolds, and the air bag cover main body having a side wall portion which includes a center of unfolding of the upper wall portion when the upper wall portion unfolds.

Abstract: A seat for use in a vehicle equipped with an automatic seatbelt system includes a seat cushion for supporting the buttocks of an occupant. The seat cushion is provided with a passage for a webbing of the seatbelt system. Accordingly, it is possible to prevent the contact between the webbing and the seat cushion when the webbing is wound up into and unwound from a webbing retractor.

Abstract: A main shaft is threadably coupled to a base mounted on a vehicle body, and this main shaft is biased by a spring in the axial direction thereof. However, the main shaft is prevented from rotating by an arm tiltably supported on the main shaft being engaged with a stopper provided on the base. In an emergency of a vehicle, an acceleration sensor turns the arm to slip off the stopper to make the main shaft rotatable, whereby the main shaft rotatingly moves in the axial direction thereof. This moving force is transmitted to the webbing, whereby the webbing is retracted, so that the webbing can be closely fastened to an occupant.

Abstract: A seatbelt retractor forcibly winds up a webbing fastened to an occupant onto a takeup shaft by utilization of an explosive force of a powder to closely attach the webbing to the occupant for restraining and protecting the occupant in an emergency of a vehicle. The retractor is provided therein with a pressure control valve for releasing an explosive pressure exceeding a predetermined value to atmosphere, which prevents a webbing takeup force beyond necessity from acting on the takeup shaft so as not to permit the webbing to excessively oppress the occupant.

Abstract: A drum is arranged coaxially with a winding barrel for winding up a webbing for restraining an occupant, the winding barrel is provided therein with an internal gear ratchet wheel and the drum is provided at the outer periphery thereof with a pawl for meshing, respectively, and, in an emergency of a vehicle, the drum is rotated, whereby the pawl is meshed with the internal gear ratchet wheel by use of cam means so that the winding barrel can be forcedly rotated in the direction of winding up the webbing, to thereby closely attach the webbing to the occupant.

Abstract: A seatbelt retractor including a means for preventing excessive tightness of the seatbelt during use. The seatbelt retractor including a frame, a seatbelt take-up spool having a torque applied thereto in a wind-up direction and rotatably coupled to the frame, at least one ratchet gear coupled to the take-up spool, a pawl pivotally coupled to the frame and engageable with the ratchet gear such that the spool is prevented from winding up when the pawl engages with the ratchet gear, and means for disengaging the ratchet from the ratchet gear when the seatbelt is completely wound on the spool or so long as the seatbelt is being pulled out from the would up state and for engaging the ratchet with the ratchet gear when the seatbelt is being utilized.

Abstract: A pair of pawls engageable with a ratchet wheel by the actuation of an acceleration detector are adapted to oscillate a lock bar through a working plate, so that said lock bar can prevent the rotation of a take-up shaft solidly secured to said ratchet wheel, to thereby stop the wind-out of a webbing for restraining an occupant which has been wound up by said take-up shaft. Particularly, since said pair of pawls are mounted on said acceleration detector through a balancer, either one of the pawls can reliably engage the ratchet wheel. Furthermore, since those pawls are guided by a guide member or members, the balancer and pawls are improved in stability.

Abstract: An occupant retaining webbing is wound up to a take-up shaft supported on a frame, a ratchet wheel is secured to said take-up shaft, and a pawl tiltingly movably supported on the frame and is engaged with the ratchet wheel to thereby stop wind-out of the webbing. Said take-up shaft pivotally supports a working plate which guides a balancer provided thereon with a pair of pawls, and due to the operation of an acceleration detector either one of the pawls is engaged with the ratchet wheel, whereby the working plate tilts the pawl to be engaged with the ratchet wheel.

Abstract: A seat belt retractor of the type for winding up two restraining seat belts on a single retractor shaft one over the other including a base, a retractor shaft rotatably supported by the base for winding up the two seat belts during retraction, a means for applying a retracting force to the retractor shaft and a means for applying a bending force to at least one of the two belts which is smaller in magnitude than the retracting force whereby slack is prevented from occurring in the retractor when the belts are wound out.

Abstract: A seat belt restraining system utilizing restraining belts which are wound up on a single retractor shaft one over the other. In the seat belt restraining system at least one of the restraining belts is provided along its entire length with a material which is more rigid than the restraining belt but which can also be bent so that the restraining belt can be wound up by a retractor mechanism.

Abstract: A seatbelt retractor including a means for preventing excessive tightness of the seatbelt during use. The seatbelt retractor including a frame, a seatbelt take-up spool having a torque applied thereto in a wind-up direction and rotatably coupled to the frame, at least one ratchet gear coupled to the take-up spool, a pawl pivotally coupled to the frame and engageable with the pawl gear such that the spool is prevented from winding up when the pawl engages with the ratchet gear, and a means for disengaging the pawl from the ratchet gear when the seatbelt is completely wound on the spool or so long as the seatbelt is being pulled out from the wound up state and for engaging the pawl with the ratchet gear when the seatbelt is being utilized.

Abstract: A tongue plate for a seat belt device in which a roller is rotatably provided in a slot in a tongue plate through which a seat belt webbing passes so that the seat belt does not press or tighten the passenger's body, when the passenger moves his body while wearing the seat belt.

Abstract: A tongue plate slidably fitted on a safety seat belt which comprises a continuous webbing which consists of a lap belt and a shoulder belt. A projection or a plurality of projections are provided in a slotted opening formed in the tongue plate, which opening provides for the passage of webbing therethrough whereby abrasion or frictional resistance of the lap belt is to be reduced when the lap belt is moved only in the direction of the shoulder belt. Suitable slack of the shoulder belt can be achieved by making the slack of the lap belt considerably smaller than that of the shoulder belt by means of said reduced frictional resistance of the lap belt.