Head protecting air bag device
First Claim
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1. An air bag device comprising:
- a bag body having at least one expansion chamber and a gas passage extending in a longitudinal direction of a vehicle body and communicating with the at least one expansion chamber;
an inflator ejecting an expansion gas in the bag body through a gas ejection port;
a flexible inner tube provided in the gas passage and supplying the expansion gas into the expansion chamber through at least one gas outlet hole; and
a pipe coupled to the gas ejection port and extending in an axial direction of the flexible inner tube, the pipe including a leading end protruding into the inner tube, wherein an inner diameter of the pipe is less than an outer diameter of the gas ejection port, and a length of the pipe is less than a distance between a rear end of the pipe and the at least one gas outlet hole, and wherein the inner diameter of the pipe becomes less at a predetermined point along the length thereof and remains less along the length thereof from the predetermined point to the leading end.
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Accused Products
Abstract
To reduce damaging of an inner tube in the vicinity of a gas ejection port of an inflator. To the peripheral portion near an end on a gas ejection port side of an inflator, one end of a pipe is fixed. The pipe extends in the axial direction of an inner tube having such flexibility as a cloth, is smaller in the diameter, shorter and higher in rigidity than the inner tube. In the pipe, its leading end is thinner than a part that is an outer portion of the gas ejection port of the inflator. Further, at the peripheral portion of the end of the pipe, a rear-leading end of the inner tube is clamped by a clamp.
43 Citations
8 Claims
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1. An air bag device comprising:
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a bag body having at least one expansion chamber and a gas passage extending in a longitudinal direction of a vehicle body and communicating with the at least one expansion chamber;
an inflator ejecting an expansion gas in the bag body through a gas ejection port;
a flexible inner tube provided in the gas passage and supplying the expansion gas into the expansion chamber through at least one gas outlet hole; and
a pipe coupled to the gas ejection port and extending in an axial direction of the flexible inner tube, the pipe including a leading end protruding into the inner tube, wherein an inner diameter of the pipe is less than an outer diameter of the gas ejection port, and a length of the pipe is less than a distance between a rear end of the pipe and the at least one gas outlet hole, and wherein the inner diameter of the pipe becomes less at a predetermined point along the length thereof and remains less along the length thereof from the predetermined point to the leading end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification
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Current AssigneeToyoda Gosei Company Limited (Toyota Motor Corporation)
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Original AssigneeToyoda Gosei Company Limited (Toyota Motor Corporation)
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InventorsOgata, Kenji, Ogata, Tetsuya, Takahashi, Hiroyuki, Tanase, Toshinori
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Primary Examiner(s)DUNN, DAVID R
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Application NumberUS10/058,289Publication NumberTime in Patent Office867 DaysField of Search280/730.2, 280/742, 280/740, 280/730.1, 280/736US Class Current280/730.2CPC Class CodesB60R 2021/2612 Gas guiding means, e.g. ductsB60R 2021/2617 Curtain bag nozzlesB60R 21/232 Curtain-type airbags deploy...B60R 21/26 characterised by the inflat...
