An oppressive sensation reducer for safety belt wherein a reducer spring and a normal spring to which outer ends are fixed are installed in a reducer spring container and a normal spring container formed in a spring holder, a spring plate and a spring spacing plate coming into contact with a plate mounting surface are installed on both sides of the normal spring, a bush shaft and a stay shaft to which inner ends are fixed are connectedly installed in the center portion of the reducer spring and normal spring, thereby simplifying the structure and facilitating the fabrication.
A device for winding and unwinding a seat belt has an electric drive which supplies a torque to a belt reel that is loaded in the belt winding direction by a motive spring. The motive spring can be wound to a blocking configuration by the torque.
A tension reducer for relieving the drawing force of a retractor for an automobile safety seat belt comprises a clutch apparatus cooperated with a retractor for inducing the smooth operation of a webbing upon the pulling out and retracting of a web, the clutch apparatus including first and second coil springs mounted therein which have different elastic force assisting in the webbing to be changed directly into a rotation force thereof, thereby reducing the friction and noise of the coil springs and removing the eccentric rotation thereof.
A webbing take-up device which, when a webbing belt is pulled out, can reduce the rewind urging force applied to the vehicle occupant by the belt. The take-up device includes a spool 20 for winding a webbing belt, a take-up shaft that is connected to the spool, a shaft member connected to the take-up shaft via adapters 30, 44, a torsion coil spring 56 connected between a ratchet wheel 52 and adapter 44, another torsion coil spring 60 connected between the adapters 30, 44 and a spiral spring 48 connected to the shaft member. When the belt is pulled out and secured over an occupant, a plunger 70 engages ratchet wheel 52, and torsion coil spring 56 is wound tighter on the adapter 44. The resultant frictional force and urging force of the torsion coil spring 60 is greater than the urging force of the spiral spring 48. Thus, slack is present in the torsion coil spring 60, and the adapter 30 rotates relatively to the adapter 44. In this way, the urging force of the spiral spring 48 is not completely applied to the spool 20, thus relieving the occupant of the full rewind force of spring 48.
A clutch 100 of the present webbing retractor has a gear wheel 116 and spring claws 182, and has peripheral direction load receiving portions 120 at the gear wheel 116, and load from the spring claws 182 is applied along a peripheral direction via the peripheral direction load receiving portions 120. Therefore, compactness and weight reduction of the clutch 100 can be aimed for. Further, the clutch 100 has a ring 176, and the ring 176 integrally has a cover portion 178 holding respective clutch structural members at predetermined assembly positions, and the spring claws 182, and is held integrally with a rotor 124 by elastic forces of the spring claws 182. In this way, the respective clutch structural members can be temporarily held (sub-assembled) integrally.
