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Pretensioners, seat belt retractors and seat belt units

A seat belt retractor and pre-tensioning technology, which is applied in the direction of car seat belts, belt retractors, transportation and packaging, etc., can solve the problem that the pressing force of multiple balls cannot effectively transmit the ring gear, and the ring gear cannot rotate Problems such as large quantity and inability to set multiple pressed parts can achieve the effect of simple installation, reduced quantity and reduced length

Active Publication Date: 2015-08-12
JOYSON SAFETY SYST JAPAN GK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the pretensioner described in Patent Document 3, since there is only one pressed portion of the ring gear that is pressed by a plurality of balls, there is a problem that the pressing force of the plurality of balls cannot be effectively transmitted to the ring gear.
Therefore, it is difficult to effectively wind the seat belt when the pretensioner is working
Also, since the ring gear has external teeth and the external teeth mesh with the pinion, the amount of rotation of the ring gear when the pretensioner operates cannot be set to be large.
In addition, since the ring gear and the pinion gear are meshed with external teeth, it is not possible to provide a plurality of pressed parts on the outer periphery of the ring gear.
Therefore, the pretensioner described in Patent Document 3 cannot be applied to the pretensioners described in Patent Document 1 and Patent Document 2

Method used

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  • Pretensioners, seat belt retractors and seat belt units
  • Pretensioners, seat belt retractors and seat belt units
  • Pretensioners, seat belt retractors and seat belt units

Examples

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Embodiment Construction

[0035] Next, preferred modes for implementing the present invention will be described with reference to the drawings.

[0036] figure 1 It is a figure which schematically shows the seat belt apparatus which has an example of embodiment of the seat belt retractor of this invention.

[0037] Such as figure 1 As shown, the seat belt device 1 of this example is basically equivalent to the conventionally known three-point seat belt device. In the figure, reference numeral 1 is a seat belt device, reference numeral 2 is a vehicle seat, reference numeral 3 is a seat belt retractor disposed near the vehicle seat 2, and reference numeral 4 is wound around the seat belt retractor 3 so as to be pulled out. The seat belt anchor 4a on the upper and front end is fixed to the seat belt on the bottom of the vehicle body or on the vehicle seat 2, and reference numeral 5 is a guide for guiding the seat belt 4 pulled out from the seat belt retractor 3 to the occupant's shoulder side Fixer 5, ...

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Abstract

In order to provide a compact and less expensive pretensioner (8) for improving the work assembly efficiency while effectively transmitting the pressing force of plural force transmission members (12) to a ring gear (16), plural balls (12a) inside a pipe (10) are pressed under the pressure of gas from a gas generator (14) in an emergency. The first ball (12a) presses a lever (17), and the balls (12a) other than the first ball (12a) sequentially press subsequent levers (18) such that the ring gear (16) rotates to move rightward. Internal teeth (16a) of the ring gear (16) are meshed with external teeth (20a) of a pinion (20) attached to a rotary shaft (19) at a side of a spool. The pinion (20) then rotates to allow the spool to retract a seatbelt. The first ball (12a) abuts on a ball stopper portion (10d) of the pipe (10) to stop the rest of the balls (12a) such that most of the balls (12a) are located in a circular movement path.

Description

technical field [0001] The present invention relates to the technical field of a pretensioner using a plurality of balls provided on a seatbelt retractor for winding a seatbelt, the technical field of the seatbelt retractor, and the technical field of a vehicle seatbelt device. Background technique [0002] Conventionally, various seat belt retractors equipped with pretensioners have been developed for seat belt devices equipped in vehicles such as automobiles. In this pretensioner, at the initial stage of an emergency when a deceleration greater than the normal deceleration is applied to the vehicle, such as a vehicle collision, the reaction gas generated by the gas generator causes the seat belt retractor to be wound toward the seat belt. The winding direction is rotated, and the seat belt is wound with the reel. As a result, the slack of the seat belt can be quickly removed, and tension can be applied to the seat belt to improve the occupant's restraint. [0003] As an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/46B60R22/34
CPCB60R2022/4642B60R22/4628
Inventor 富田浩
Owner JOYSON SAFETY SYST JAPAN GK
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