RETRACTOR PRETENSIONER OF SEAT BELT FOR VEHICLE
First Claim
1. A retractor pretensioner of a vehicle seat belt, comprising:
- a spool around which the seat belt is wound, wherein the spool is rotatably installed in a frame to rotate the spool relative to the frame by gas pressure transmitted from a gas generator to the spool; and
a valve shaft installed in the spool, wherein the valve shaft operates as a rotating shaft of the gas generator with respect to the frame when the gas generator is not operated and as a valve, through which the gas is discharged out of the spool, when the gas generator is operated.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein is a retractor pretensioner of a vehicle seat belt. The retractor pretensioner of the present invention may prevent an overshoot phenomenon in which residual pressure of gas impedes reverse rotation of a spool when the pretensioner operates as a load limiter. The pretensioner includes a spool around which the seat belt is wound and wherein the spool is rotatably installed in a frame to rotate the spool relative to the frame by gas pressure transmitted from a gas generator to the spool. In addition, the pretensioner includes a valve shaft that is installed in the spool, wherein the valve shaft operates as a rotating shaft of the gas generator with respect to the frame when the gas generator is not operated and as a valve, through which the gas is discharged out of the spool, when the gas generator is operated.
10 Citations
9 Claims
-
1. A retractor pretensioner of a vehicle seat belt, comprising:
-
a spool around which the seat belt is wound, wherein the spool is rotatably installed in a frame to rotate the spool relative to the frame by gas pressure transmitted from a gas generator to the spool; and a valve shaft installed in the spool, wherein the valve shaft operates as a rotating shaft of the gas generator with respect to the frame when the gas generator is not operated and as a valve, through which the gas is discharged out of the spool, when the gas generator is operated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification