Patent ID: 6871813
Filing Date: 2005-03-29
Classification: B60R

Abstract:
1. A vehicular seatbelt retractor for winding and releasing a length of webbing from a spool, said vehicular seatbelt retractor comprising: a frame including openings formed at a center of each of a pair of left and right leg portions, on an upper portion of each leg portion a frictional tooth portion is formed in a predetermined arc; a spool including a winding portion sealed at one end and opened at the other end and a sprocket portion for winding a web thereon, in which the winding portion forming a cavity therein, the spool including a flange formed on a circumferential portion from one side of said spool to be positioned on an opening thickness of said left leg portion with a shaft projected from a center of said sealed end to be coupled with one end of a spring and another flange having stoppers formed in a diametrical line on a circumference thereof facing each other, on an upper surface of each stopper a fixing pin is mounted; a load control including a torsion bar inserted into said cavity, on both ends of which a coupling portion is formed, a disk having guiders bent downward to be respectively positioned adjacent said stoppers contacting said flange on said opened end of said winding portion and a projector formed on an upper surface of the disk and a sprocket portion having a boss projected therefrom and coupled with one end of said torsion bar, a groove formed on a circumference of the sprocket portion adjacent said boss to guide the movement of said projector, a sprocket stretched from a flange to be engaged with a tooth portion of said right leg portion and having another shaft projected from a center of the sprocket; a locking portion mounted adjacent said sprocket portion to stop rotation of said spool; a web sensor including a retainer mounted adjacent said sprocket portion to couple a guide of said locking portion with a hook ring thereof, around an inner circumference of the retainer, a second sprocket is formed, a clutch wheel including an opening portion at a center, a first tooth portion formed on an inner circumference of said opening and a second tooth portion formed around an outer circumference thereof to be concentric with said first tooth portion and a mass member coupled with said clutch wheel and having a wing integrally extended in an arc around a circumference thereof and a latch member connected at one end to an inertia spring to be elastically supported, one end of the latch member being formed to be passed over tops of teeth of a first tooth portion of said clutch wheel; and a vehicle sensor mounted adjacent said clutch wheel to engage with a second tooth portion of said clutch wheel.