| 摘要 |
A retracting reel assembly including a support means and a reel means which is rotatably supported by the support means and an elongated flexible seat belt connected to the reel means and adapted to be wound thereon and unwound therefrom. A locking bar is movable between a locked position engaging the reel means and an unlocked position for respectively preventing and allowing rotation of the reel means. There is also included time delay means for allowing the locking means to move to the locked position following the expiration of a predetermined period of time after the initial unwinding of the flexible element from the fully wound position. The time delay means includes a cup-shaped member and a flexible element which are connected together to define a closed chamber. A piston is movable in the chamber and is guided therein by a post and a flexible seal means coacts between the piston and the chamber. The seal means and the flexible wall of the chamber are an integral member and are disposed over an upwardly extending sleeve portion of the piston. The seal means is urged into sealing engagement with the chamber upon movement of the piston in the first direction and is freely movable out of its sealing engagement with the chamber upon movement of the piston in the second direction. The seal means has a passage therethrough to allow fluid flow or to meter fluid flow from one side of the piston to the other.
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