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WO2000009365A1 - Siege a air bag - Google Patents

Siege a air bag Download PDF

Info

Publication number
WO2000009365A1
WO2000009365A1 PCT/JP1999/004370 JP9904370W WO0009365A1 WO 2000009365 A1 WO2000009365 A1 WO 2000009365A1 JP 9904370 W JP9904370 W JP 9904370W WO 0009365 A1 WO0009365 A1 WO 0009365A1
Authority
WO
WIPO (PCT)
Prior art keywords
air bag
seat
cover element
casing
air
Prior art date
Application number
PCT/JP1999/004370
Other languages
English (en)
Inventor
Yoshiaki Murata
Syunji Takazawa
Original Assignee
Nhk Spring Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nhk Spring Co., Ltd. filed Critical Nhk Spring Co., Ltd.
Priority to EP99937044A priority Critical patent/EP1021317A1/fr
Publication of WO2000009365A1 publication Critical patent/WO2000009365A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/0002—Type of accident
    • B60R2021/0006—Lateral collision

Definitions

  • This invention relates to an air-bagged seat provided with a side air bag capable of effectively protecting a user when a vehicle is subjected to a lateral force of impact.
  • An air bag that is mounted in a vehicle such as an automobile is caused instantaneously to bulge by means of gas that is generated by an inflator in case of a collision.
  • the inflated air bag restrains a user from undergoing a second collision with some interior members.
  • the air bag may be effectively located in front of the user, that is, in a center pad of a steering wheel, or near a glove box in front of a passenger seat.
  • a side impact can be effectively tackled by a so-called side air bag that is incorporated in a seat back or the like.
  • a conventional side-air-bagged seat 1 shown in FIG. 7 is provided with an air bag module 4 that is incorporated in a side portion 3 of a seat back 2 that, out of a pair of side portions, left and right, is nearer to a door.
  • An inflator 5 is actuated in response to a signal delivered from a sensor when the vehicle is subjected to a side impact, whereupon the air bag 6 is inflated with gas that is generated by the inflator 5.
  • the seat back 2 includes a frame 7, pad 8, cover member 9, etc.
  • thread 11 in a sewing portion 10 between a seat-back front cover element 9a and a side cover element 9b is broken by pressure that acts thereon from inside the cover member 9.
  • the air bag 6 bulges forward ( in the direction indicated by arrow F) from the seat back 2 through the broken portion, as indicated by two-dot chain line (shown in FIG. 7), and unfolds into a shape such that it can protect the flank, temple, etc. of the user.
  • the air bag 6 is stored together with the inflator 5 in a box-shaped casing 15.
  • the casing 15 is provided with a casing body 15a fixed to the frame 7 and a lid 15b attached to the casing body 15a and situated between the casing body 15a and the side cover element 9b.
  • the lid 15b is swingable around a hinge portion 16.
  • the lid 15b can be kept on in a manner such that retaining portions 17 such as hooks on the front end of the casing body 15a are anchored individually to receiving portions 18 that are formed on the lid 15b, as shown in FIG. 8.
  • the air bag 6 in this air bag module 4 unfolds when the lid 15b is swung open around the hinge portion 16 as the air bag 6 inflates, as shown in FIG. 9.
  • the inflator 5 is stored in the casing 15.
  • the lid 15b swings open sideways with respect to the seat back or toward the side cover element 9b.
  • a front edge portion C of the lid 15b and the like sometimes may abut hard against the side cover element 9b (shown in FIG. 7) when the lid 15b is taken off. Accordingly, stress is concentrated on a contact portion between the front edge portion C and the side cover element 9b, so that the side cover element 9b may possibly tear as the air bag 6 unfolds. In this case, the unfolding pressure of air bag 6 cannot easily act on the sewing portion 10, so that the unfolding performance of the air bag 6 may possibly be influenced.
  • the object of the present invention is to provide an air-bagged seat in which a side cover element or any other region than a sewing portion can be prevented from tearing when an air bag unfolds, so that the air bag can display proper unfolding performance.
  • an air-bagged seat having an air bag module in a seat back, in which a cover member for covering an air bag storage portion of the seat back includes a seat-back front cover element and a side cover element sewn together, the air bag module is provided with a casing containing an air bag and an inflator therein and fixed to a frame of the seat back, and the casing includes a tubular guide portion having two opposite side walls, a top wall, and a bottom wall, the front end of the guide portion having a front opening directed toward a sewing portion between the seat-back front cover element and the side cover element.
  • gas jetted out from the inflator is introduced into the air bag in case of a collision.
  • the air bag is inflated with this gas .
  • the air bag projects forward from the front opening through the guide portion of the casing and unfolds toward a sewing portion of the cover member. Thread in the sewing portion is broken as this air bag unfolds steadily in a regular direction.
  • the shock of a second collision between a user and interior members can be eased by the air bag unfolded in this manner.
  • the air bag stated herein is a member that can be inflated like a bag with gas, such as nitrogen gas. It is to be understood that any kinds of gases may be used for inflation.
  • This invention further comprises a front cover provided on the front end of the guide portion of the casing, covering the opening, and adapted to expose the opening when the air bag unfolds .
  • the front cover can be swung open toward the frame around a hinge portion situated closer to the frame. According to this invention, the front cover swings open toward the frame of the seat back around the hinge portion when the air bag unfolds, so that the front cover can be prevented from abutting against the cover member such as the side cover element .
  • FIG. 1 is a cross-sectional view of part of an air-bagged seat according to a first embodiment of this invention
  • FIG. 2 is a perspective view of the air-bagged seat shown in FIG. 1;
  • FIG. 3 is a perspective view of an air bag module used in the air-bagged seat shown in FIG. 1;
  • FIG. 4 is a perspective view of the air-bagged seat shown in FIG. 1 with its air bag unfolded;
  • FIG. 5 is a perspective view of an air bag module according to a second embodiment of this invention.
  • FIG. 6 is a perspective view of the air bag module shown in FIG. 5 with its air bag unfolded;
  • FIG. 7 is a cross-sectional view of part of a conventional air-bagged seat;
  • FIG. 8 is a perspective view of an air bag module used in the air-bagged seat shown in FIG. 7;
  • FIG. 9 is a perspective view of the air bag module shown in FIG. 8 with its air bag unfolded.
  • FIG. 10 is a side view of the air bag module shown in FIG. 8.
  • a side-air-bagged seat 20 shown in FIGS. 1 and 2 is applicable to a front seat of an automobile.
  • the seat 20 is provided with a seat cushion 21 and a seat back 22.
  • the seat back 22 is provided with a seat back frame 23, a pad 24 formed of, e.g., polyurethane foam, and a cover member (front seat trim cover) 25 that externally covers the seat back frame 23, pad 24, etc.
  • the cover member 25, which constitutes a covering of the seat back 22, is formed by cutting a cover element of, e.g., artificial leather into a given shape and sewing it.
  • the artificial leather is a cover element obtained by coating the outer surface of knitted fabric for use as a back fabric base with an elastomer layer. Natural leather or woven fabric may be used as a cover element for the cover member 25.
  • a side portion 22a of the seat back 22 functions as an air bag storage portion.
  • Part of the cover member 25 that covers the side portion 22a includes a seat-back front cover member 25a for use as a first cover element and a side cover element 25b for use as a second cover element. These cover elements 25a and 25 are sewn together at a sewing portion 26 by means of sewing thread 27.
  • the seat-back front cover element 25a constitutes the front face of the seat back 22, while the side cover element 25b constitutes a side face of the seat back 22.
  • the cover member 25 that covers the side portion 22a may be formed by combining the seat-back front cover element 25a, side cover element 25b, and some other cover elements.
  • a bracket 28 is fixed to the lateral of the seat back frame 23 by welding or the like.
  • the bracket 28 includes a mounting plate 28a having a shape such that it extends along an air bag module 30, which will be described below.
  • the air bag module 30 is incorporated in the side portion 22a that, out of two opposite side portions 22a and 22b of the seat back 22, is nearer to a door.
  • the air bag module 30 is provided with a casing 31 (shown in FIG. 3), an air bag 32 stored flat in the casing 31, an inflator 33 for generating inflator gas such as nitrogen gas, etc.
  • the casing 31 is fixed to the mounting plate 28a of the bracket 28 of the seat back frame 23.
  • the casing 31 includes a tubular guide portion 34 that has two opposite side walls 31a and 31b, a top wall 31c, and a bottom wall 3Id.
  • a bolt 36 is provided on the rear part of the casing 31.
  • the casing 31 is fixed in a predetermined position on the bracket 28 by passing the bolt 36 through a hole in the mounting plate 28a and fastening a nut 37 to the bolt 36 in an engaged manner.
  • the inflator 33 is connected with an ignition system, which includes a sensor for detecting a side collision of a vehicle, a power source (not shown), etc.
  • a front opening 40 is formed in the front end of the guide portion 34 of the air bag module 30. The front opening 40 is directed toward the sewing portion 26 between the seat-back front cover element 25a and the side cover element 25b and opens in front of the casing 31.
  • All the regions of the casing 31 except the front opening 40 that is, the opposite side walls 31a and 31b, the top wall 31c, the bottom wall 3Id, a rear wall 31e, etc. of the guide portion 34, are linked to one another in the form of a box having an internal space defined therein.
  • These walls 31a, 31b, 31c and 31d function also as guides for regulating the unfolding direction of the air bag 32 so that the air bag 32 can be directed toward the front opening 40.
  • the inflator 33 When the vehicle receives a lateral force of impact, the inflator 33 is actuated in response to a signal delivered from the sensor for detecting a collision of the vehicle, whereupon the inflator gas such as nitrogen gas is jetted out from injection nozzles 33a of the inflator 33. The jetted gas is ejected into the air bag 32 in a manner such that the direction of its ejection is regulated by the casing 31.
  • the air bag 32 When the air bag 32 starts to be inflated with the gas jetted out by the inflator 33, the air bag 32 projects toward the front opening 40 through the guide portion 34 of the casing 31, and unfolds ahead of the casing 31 through the front opening 40, that is, toward a position near the sewing portion 26.
  • the air bag module 30 according to this embodiment unlike the conventional air bag module, is not provided with any lid that swings open sideways with respect to the seat, so that the side cover element 25b can be prevented from being torn by the lid.
  • the unfolding force of the air bag 32 acts directly on the sewing thread 27 in the sewing portion 26, so that the sewing thread 27 in the sewing portion 26 breaks without fail.
  • This air bag 32 spreads out in the direction indicated by arrow F, as indicated by two-dot chain line in FIG. 1.
  • FIG. 4 shows the air bag 32 in its unfolded state. Since the unfolded air bag 32 is located in a space between the flank of a seated user's body and an inner side wall of the vehicle body, the shock of a second collision between the user and the inner side wall of the vehicle body can be eased.
  • FIG. 5 shows a second embodiment of this invention.
  • a front cover 50 for closing the front opening 40 is provided on the front end of the guide portion 34 of a casing 31.
  • this embodiment is similar to the foregoing embodiment (FIGS. 1 to 4). Therefore, portions common to the two embodiments are designated by common numerals, and a description of those portions is omitted.
  • the front cover 50 is swingable around a hinge portion 51 on that edge portion of the front opening 40 which is situated closer to the bracket 28.
  • the front cover 50 can be kept on the casing 31 in a manner such that retaining portions 52 such as hooks on the casing 31 are anchored individually to receiving portions 53 such as holes in the cover 50.
  • the front cover 50 swings toward the frame 23 around the hinge portion 51, whereupon the front cover 50 is undone.
  • an air bag module 30 (FIGS. 5 and 6) having the front cover 50 constructed in this manner, the air bag 32 projects toward the front opening 40 through the guide portion 34 of the casing 31, and unfolds toward the sewing portion 26 (shown in FIG. 1) of the cover member 25 through the front opening 40.
  • the front cover 50 according to this embodiment unlike the conventional lid, never swings open sideways with respect to the seat.
  • the air bag module 30 according to this embodiment is not provided with any lid that abuts against the side cover element 25b when the air bag 32 unfolds, so that the side cover element 25b can be prevented from being torn by the lid.
  • the air bag module 30 is supposed to be incorporated in the seat back 22 of a passenger seat in a right-hand wheel vehicle. According to this invention, however, the same effect as aforesaid can be obtained by incorporating an air bag module 30 similar to the one according to the foregoing embodiment in a door-side portion of the seat back of a driver's seat, for example .
  • the air-bagged seat according to this invention unlike the conventional air-bagged seat, is not provided with any lid that swings open sideways with respect to the seat as the air bag unfolds, so that the cover member such as the side cover element can be prevented from being torn by the lid when the air bag unfolds, and therefore, the air bag can display proper unfolding performance.
  • the air-bagged seat of this invention is suited for use in a vehicle such as an automobile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Seats For Vehicles (AREA)

Abstract

Une partie (22a) de stockage d'air-bag d'un élément (25) recouvrant un dossier de siège (22) comprend un élément de recouvrement avant (25a) et un élément de recouvrement latéral (25b) cousus ensemble. Un module d'air-bag (30) contenu dans un logement (31) comprend un air-bag (32) et un gonfleur (33). Le logement (31) est constitué d'un guide tubulaire (34) composé de deux parois latérales opposées (31a,31b), d'une paroi supérieure (31c) et d'une paroi inférieure (31d). L'extrémité frontale du guide (34) présente une ouverture frontale (40) dirigée vers une partie cousue (26) située entre les éléments de recouvrement avant (25a) et latéral (25b) du dossier de siège.
PCT/JP1999/004370 1998-08-12 1999-08-12 Siege a air bag WO2000009365A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99937044A EP1021317A1 (fr) 1998-08-12 1999-08-12 Siege a air bag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10228188A JP2000052912A (ja) 1998-08-12 1998-08-12 エアバッグ内蔵シート
JP10/228188 1998-08-12

Publications (1)

Publication Number Publication Date
WO2000009365A1 true WO2000009365A1 (fr) 2000-02-24

Family

ID=16872597

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/004370 WO2000009365A1 (fr) 1998-08-12 1999-08-12 Siege a air bag

Country Status (3)

Country Link
EP (1) EP1021317A1 (fr)
JP (1) JP2000052912A (fr)
WO (1) WO2000009365A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2441872A (en) * 2006-09-13 2008-03-19 Lear Corp A vehicle seat air bag assembly including a deployment guide
US8272665B2 (en) 2011-01-24 2012-09-25 Lear Corporation Side air bag assembly for vehicle seat
DE102013200047A1 (de) 2012-02-07 2013-08-08 Lear Corp. Fahrzeugsitz-Seitenairbag-Anordnung, die mittels Lasche befestigten Airbag-Kanal aufweist
DE102012211753A1 (de) 2012-07-05 2014-06-05 Lear Corp. Side Air Bag Assembly for Vehicle Seat Having External Rigid Deflector Sleeve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007230310A (ja) * 2006-02-28 2007-09-13 Toyoda Gosei Co Ltd サイドエアバッグ装置
WO2016010011A1 (fr) * 2014-07-14 2016-01-21 テイ・エス テック株式会社 Dispositif de coussin de sécurité gonflable latéral
JP6923793B2 (ja) * 2017-08-04 2021-08-25 テイ・エス テック株式会社 乗物用シート

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07215159A (ja) * 1994-02-07 1995-08-15 Mazda Motor Corp 車両のエアバッグ装置
GB2296476A (en) * 1994-12-20 1996-07-03 Ikeda Bussan Co Vehicular seat with side air-bag vertically mounted in a cutout or groove in the seat side panel
JPH0986327A (ja) * 1995-09-26 1997-03-31 Mazda Motor Corp 車体側部のエネルギ吸収構造
JPH09150706A (ja) * 1995-11-29 1997-06-10 Araco Corp エアバッグ装置付き車両用シート
WO1997031804A1 (fr) * 1996-02-29 1997-09-04 General Motors Corporation Module de coussin gonflable de securite
EP0818363A2 (fr) * 1996-07-12 1998-01-14 Mazda Motor Corporation Dispositif supplémentaire de sac gonflable latéral pour véhicule
JPH1053089A (ja) * 1996-08-09 1998-02-24 Ikeda Bussan Co Ltd 車両用シートのエアバッグ装置
JPH10129382A (ja) * 1996-10-25 1998-05-19 Honda Motor Co Ltd エアバッグ装置
JPH10152013A (ja) * 1996-09-27 1998-06-09 Mazda Motor Corp 車両側部のエネルギ吸収装置及びその装置の製造方法
JPH10194067A (ja) * 1997-01-10 1998-07-28 Ikeda Bussan Co Ltd 車両のエアバッグ装置
EP0856439A1 (fr) * 1996-09-03 1998-08-05 Toyota Jidosha Kabushiki Kaisha Structure de siege supportant un air-bag lateral

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07215159A (ja) * 1994-02-07 1995-08-15 Mazda Motor Corp 車両のエアバッグ装置
GB2296476A (en) * 1994-12-20 1996-07-03 Ikeda Bussan Co Vehicular seat with side air-bag vertically mounted in a cutout or groove in the seat side panel
JPH0986327A (ja) * 1995-09-26 1997-03-31 Mazda Motor Corp 車体側部のエネルギ吸収構造
JPH09150706A (ja) * 1995-11-29 1997-06-10 Araco Corp エアバッグ装置付き車両用シート
WO1997031804A1 (fr) * 1996-02-29 1997-09-04 General Motors Corporation Module de coussin gonflable de securite
EP0818363A2 (fr) * 1996-07-12 1998-01-14 Mazda Motor Corporation Dispositif supplémentaire de sac gonflable latéral pour véhicule
JPH1053089A (ja) * 1996-08-09 1998-02-24 Ikeda Bussan Co Ltd 車両用シートのエアバッグ装置
EP0856439A1 (fr) * 1996-09-03 1998-08-05 Toyota Jidosha Kabushiki Kaisha Structure de siege supportant un air-bag lateral
JPH10152013A (ja) * 1996-09-27 1998-06-09 Mazda Motor Corp 車両側部のエネルギ吸収装置及びその装置の製造方法
JPH10129382A (ja) * 1996-10-25 1998-05-19 Honda Motor Co Ltd エアバッグ装置
JPH10194067A (ja) * 1997-01-10 1998-07-28 Ikeda Bussan Co Ltd 車両のエアバッグ装置

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 10 31 October 1997 (1997-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 12 31 October 1998 (1998-10-31) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2441872A (en) * 2006-09-13 2008-03-19 Lear Corp A vehicle seat air bag assembly including a deployment guide
GB2441872B (en) * 2006-09-13 2009-01-28 Lear Corp Vehicle seat side air bag asembly
US7637531B2 (en) 2006-09-13 2009-12-29 Lear Corporation Vehicle seat side air bag assembly
US8272665B2 (en) 2011-01-24 2012-09-25 Lear Corporation Side air bag assembly for vehicle seat
DE102013200047A1 (de) 2012-02-07 2013-08-08 Lear Corp. Fahrzeugsitz-Seitenairbag-Anordnung, die mittels Lasche befestigten Airbag-Kanal aufweist
DE102013200047B4 (de) * 2012-02-07 2018-11-08 Lear Corp. Fahrzeugsitz-Seitenairbag-Anordnung, die mittels Lasche befestigten Airbag-Kanal aufweist
DE102012211753A1 (de) 2012-07-05 2014-06-05 Lear Corp. Side Air Bag Assembly for Vehicle Seat Having External Rigid Deflector Sleeve
US8814203B2 (en) 2012-07-05 2014-08-26 Lear Corporation Side air bag assembly for vehicle seat having external rigid deflector sleeve

Also Published As

Publication number Publication date
JP2000052912A (ja) 2000-02-22
EP1021317A1 (fr) 2000-07-26

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