Winding spring for seat belt winding apparatus
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United States of America Patent
Stats
-
Mar 3, 1981
Grant Date -
N/A
app pub date -
Sep 26, 1979
filing date -
Sep 29, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a winding spring for a seat belt winding apparatus which comprises an output drum and a take-up drum. The winding spring is stretched in the S-shaped form between the output drum and take-up drum. In the normal use region of the entire length of the winding spring, the natural radius of curvature of the spring is gradually increased. In the surplus use region of the spring, the natural radius of curvature of the spring is divided into a part where it is gradually decreased and a part where it is kept constant. The natural radius of curvature in the free end portion of the winding spring is increased.
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