Seat belt retractor
AssigneeTakata Corporation
InventorsMasahiro Shiotani, Joji Mishina, Yasushi Kanamori, Mizuno Isamu
Life of this patent
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Abstract
A seat belt retractor which achieves more stable performance of a pretensioner is provided. The seat belt retractor includes a spool for winding up a belt thereon. The spool has a shaft portion, a spool gear, and a spring-biased shaft projection which are disposed to project from a face of the spool. A spool bearing (or ring-like collar) is fitted around the shaft portion of the spool. The spool bearing is made of a material having high hardness and high rigidity such as SUS or SC. By this spool bearing, the spool is prevented from being directly subjected to load, like a bearing.
Claims8
A seat belt retractor comprising:
- a spool for winding up a seat belt rotatably held in a frame;
- a bearing attached to a portion of said spool held by said frame;
- a clutch mechanism arranged on one end of said spool;
- a pretensioner disposed adjacent to said clutch mechanism;
- and
- wherein said spool is made of light alloy, and said bearing is made of steel.
A seat belt retractor comprising:
- a rotatable spool for winding and unwinding a seat belt;
- a pretensioner operably connected to the spool for rotating the spool to wind the seat belt;
- wherein the pretensioner includes an opening for retaining the spool;
- and
- wherein a bearing is positioned in the opening between the pretensioner and the spool.
Dependencies are inferred from the claim text.