Seatbelt retractor of an automobile
AssigneeHyundai Motor Company
InventorByoung Tae Jeong
Life of this patent
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Abstract
The present invention relates to a seatbelt retractor of an automobile, which is provided with a frictional clutching means for decreasing the rotating speed of a drum shaft where a webbing and a spiral spring are fixed, whereby locking of a vehicle sensor is inhibited by reducing the shock caused by sudden expansion of the spiral spring.
Claims8
A seatbelt refractor comprising a frictional clutching means equipped in a drum, said clutching means acting between the drum and a drum shaft rotatable within the drum to reduce rotating speed of the drum shaft, to which a webbing and spiral spring are fixed, in response to expansion of said spiral spring during retraction of the webbing, and wherein the frictional clutching means comprises:
- a first rod member slidably inserted into a guide element so that the first rod member can slide through said guide element in accordance with expansion of the spiral spring, the first rod member being provided with a guide slot at the center thereof;
- a restoring spring installed at one end of said first rod member for elastically supporting said first rod member;
- a gear member pivotally fixed to a drum by a pivot shaft and slidably connected to said guide slot by a guide pin;
- and,
- a second rod member that slidably moves engaging with tooth of said gear member.
A seatbelt retractor, comprising:
- a drum containing a rotatable drum shaft and a spiral spring acting between the drum and shaft, said shaft configured and dimensioned for winding a seatbelt webbing thereon;
- and
- a frictional clutch operatively connected to said spiral spring and acting on said drum shaft in response to an increase in diameter of the spiral spring, wherein said frictional clutch comprises:
- an actuator rod slidably mounted with the drum and bearing against the spiral spring;
- a friction rod bearing against the drum shaft;
- a linkage operatively connecting the actuator rod and friction rod so as to apply pressure to the drum shaft in response to expansion of the spiral spring.
Dependencies are inferred from the claim text.