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Seat belt retractor

A technology for seat belt retractors and seat belts, which is applied in the directions of seat belts, belt retractors, transportation and packaging, etc. in the car, which can solve the problems of excessive slack and slack enlargement, and achieve the effect of improving functions

Inactive Publication Date: 2007-11-14
JOYSON SAFETY SYST JAPAN KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if the occupant wears thick clothes, the resultant slack to be eliminated becomes larger due to the clothes, and in this case, it is easy to cause excessive slack

Method used

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  • Seat belt retractor
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Modes for implementing the present invention will be described below. An example of the overall structure of a seat belt device equipped with a seat belt retractor according to an embodiment is shown in FIG. 1 . The safety belt device 1 of this example is installed on the vehicle seat S, and is used to constrain the vehicle occupant M on the seat S, including a safety belt 2, a safety belt retractor 3, a tongue 4, a buckle device 5, a shoulder Fixer 6 and stopper 7.

[0026] The seat belt 2 is wound on the seat belt retractor 3 in a pull-out manner on one side, and the end of the other side is rotatably connected to the body B of the vehicle through the stopper 7, and its middle part passes through the shoulder Fixer6. When the occupant M wants to wear the seat belt 2, the seat belt 2 is pulled out from the seat belt retractor 3 through the tongue 4 slidably installed on the seat belt 2, and then the tongue 4 is connected with the buckle device 5 By buckling, the occ...

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PUM

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Abstract

The invention provides a seat belt retractor. In order to impart sufficient tension to a seat belt (2) for a restraining operation when slack is excessive in a ball-type pretensioner (19) of a seat belt device (1), the pretensioner (19) moves a ball train (32L) to the distal end side of a ball guide pipe (31) by means of gas (G) discharged from a gas generating device (37), and the movement rotates the spool (13) for winding the seat belt (2) in a belt winding direction so as to eliminate slack of the seat belt (2), while imparting necessary tension to the seat belt (2) by loading rotational resistance on the spool (13) in a belt withdrawing direction with gas pressure exerted on the ball train (32L). The ball stopper (33) stops movement of the ball train (32L) before all the balls (32) in the ball train (32L) are ejected from the ball guide pipe (31) in a state where the ball train (32L) functions to rotate the spool (13) in the belt winding direction.

Description

technical field [0001] The present invention relates to a seat belt retractor in a seat belt device, in particular to a seat belt retractor equipped with a pretensioner for increasing the restraining force of the seat belt when the seat belt device performs a restraining action. Background technique [0002] The seat belt device is a device that restrains the occupant (seat belt wearer) by restraining the rapid movement of the occupant (seat belt wearer) caused by the rapid acceleration caused by the collision of the vehicle, etc. installation. Such a seat belt device is composed of a seat belt, a seat belt retractor, and a buckle device as main elements, the seat belt retractor being the main mechanism element. [0003] The seat belt retractor has a take-up unit called a spool, and the seat belt can be accommodated by pulling the seat belt around the spool by spring force. When the occupant wears the seat belt, the tongue plate installed on the seat belt is pulled to pull...

Claims

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Application Information

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IPC IPC(8): B60R22/46B60R22/44
CPCB60R22/4628B60R2022/4642
Inventor 平松幸治
Owner JOYSON SAFETY SYST JAPAN KK
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