WO2003078215A1 - Insufflateur a calotte - Google Patents

Insufflateur a calotte Download PDF

Info

Publication number
WO2003078215A1
WO2003078215A1 PCT/JP2003/003342 JP0303342W WO03078215A1 WO 2003078215 A1 WO2003078215 A1 WO 2003078215A1 JP 0303342 W JP0303342 W JP 0303342W WO 03078215 A1 WO03078215 A1 WO 03078215A1
Authority
WO
WIPO (PCT)
Prior art keywords
inflation
cap
diffuser
gas outlet
diameter portion
Prior art date
Application number
PCT/JP2003/003342
Other languages
English (en)
Japanese (ja)
Inventor
Yuzo Goto
Yasunori Iwai
Masayuki Nakayasu
Original Assignee
Daicel Chemical Industries, 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 Daicel Chemical Industries, Ltd. filed Critical Daicel Chemical Industries, Ltd.
Publication of WO2003078215A1 publication Critical patent/WO2003078215A1/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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
    • B60R21/272—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators

Definitions

  • the present invention relates to an inflation overnight with a cap suitable for use as an inflation overnight for a vehicle, an inflation for a side airbag, or the like, and an airbag apparatus using the inflation night with a cap.
  • the driver's seat airbag inflation Inflation for passenger airbags, inflation for side airbags, inflation for curtains, inflation for bolsters, inflation for inflation for seat belts, inflation for tubular systems,
  • Various inflation nights such as an inflation night for a retainer, are known.
  • the curtain inflation event instantly expands a curtain-shaped airbag with a thickness of several centimeters to the window side of the vehicle when the vehicle receives a side impact. It is to let.
  • US Pat. No. 5,527,066 discloses an apparatus for expanding a flexible container by using helium and hydrogen in combination
  • US Pat. No. 5,728,486 Discloses a gas flow device for an airbag using a pressurized inert gas
  • 3,680,886 discloses that an airbag is inflated with nitrogen or helium
  • No. 5,803,493 discloses a side inflation overnight housing for airbags using both pressurized gas and a gas generating agent.
  • Japanese Utility Model Publication No. 03131246 discloses a pressurized gas inflation system using argon or nitrogen as a pressurized gas.
  • An object of the present invention is to provide an airbag device using a cap with a cap that can achieve a reduction in size and weight, improve workability, and simplify the manufacturing process.
  • the present invention provides, as a means for solving the above problems, a tubular inflation overnight housing, one end of which is closed and the other end of which has an opening; And a diffuser part having a first gas discharge port for discharging a pressurized medium flowing out of the opening during operation to the outside, and an opening of the inflator housing.
  • the outflow path of the pressurized medium between the diffuser and a part of the diffuser is closed with a rupturable plate, and furthermore, a part of the diffuser is provided with a means for destroying the rupturable plate.
  • an inflation system with a cap which covers at least an outer surface including a first gas outlet and has a cap having an opening serving as a second gas outlet by caulking.
  • the cap is provided between a minimum diameter portion provided on both sides in the length direction, a maximum diameter portion provided at a center portion in the length direction, and the minimum diameter portion and the maximum diameter portion.
  • a barrel-shaped member having a step portion, preferably having an opening serving as the second gas discharge port at the step portion or the maximum diameter portion, and being attached to a part of the diffuser at the minimum diameter portion.
  • the second gas outlet at the step, the maximum diameter part, or both the step and the maximum diameter part
  • a space for distributing the pressurized medium can be secured between the first gas outlet and the second gas outlet, so that the ejection of the pressurized medium is not hindered.
  • the cap is attached by caulking one or both of the minimum diameter portions in a groove provided on a part of the peripheral surface of the diffuser. It is desirable that the groove provided on the part of the peripheral surface of the diffuser is a continuous groove (ring groove) that goes around the peripheral surface.
  • the cap By installing in the groove in this way, the cap can be more firmly fixed to the diffuser part, and when attaching the airbag to the inflator, it can be connected and fixed using the groove (caulked part).
  • the total opening area of the second gas discharge port is larger than the total opening area of the first gas discharge port, and the total opening area of the second gas discharge port is 1.10 of the total opening area of the first gas discharge port. It is preferably at least 5 times.
  • the pressure of the pressurized medium to be ejected can be controlled by the first gas outlet.
  • a plurality of the first gas outlets are provided, and at least two of the plurality of the first gas outlets are arranged at positions symmetrical in the width direction or at positions similar thereto. .
  • the cross section in the width direction of a part of the diffuser is circular and two or more first gas outlets are provided, at least two first gas outlets are positioned in the width direction ( (In the radial direction).
  • the three outlets are evenly arranged at an angle of 120 °, and when four primary gas outlets are provided, the four outlets are installed at an angle of 90 °. It is desirable that they are evenly distributed, and the same applies when five or more are provided.
  • the workability at the time of manufacturing is improved by using the cylindrical inflation housing which is symmetrical with respect to the axial direction and the width direction.
  • the present invention provides, as means for solving the above problems, an operation signal output means comprising an impact sensor and a control unit, and a module case in which the inflation with cap and the airbag are housed in a case. To provide an airbag device.
  • the inflation process of this invention can assemble easily, can reduce the burden of an operator, and can increase the connection strength at the time of connecting an airbag.
  • FIG. 1 is an axial sectional view of an inflation process according to the present invention.
  • FIG. 2 is a diagram for explaining a method of attaching a cap in the event of FIG. 1.
  • FIG. 1 is a cross-sectional view of the inflation of the present invention in the longitudinal direction
  • FIG. 2 is a view for explaining a method of mounting a cap by caulking.
  • the inflation housing 12 has an opening 14 at one end, and the other end is closed by swaging or spinning.
  • a pressurized medium consisting of inert gas such as argon and helium, and nitrogen gas has a maximum pressure of 600,000 k. It is filled with about Pa.
  • the inflation housing 12 has a circular cross section in the width direction, and the opening 14 is also circular.
  • the inflation housing 12 can be symmetrical with respect to the axial and width directions. After connecting the diffuser part 20 to the inflation overnight housing 12, the pressurized medium is filled from the gap between the seal pins 17 fitted into the pores provided on the closed end face, and then thinned together with the seal pins 17. The hole is welded and completely closed.
  • the diffuser part 20 is connected to the opening 14 side of the inflation overnight housing 12, and the diffuser part 20 is a first gas discharge port 2 for allowing the pressurized medium to flow out.
  • the first gas outlet 22 is not closed, and a screen 29 made of an annular wire mesh for removing fragments of the rupturable plate 19 is arranged inside the first gas outlet 22.
  • the inflation housing 12 and the diffuser part 20 may be connected by welding (welded portion 26) as shown in Fig. 1, or a male thread is provided on the outer peripheral surface of the end of the inflation housing 12.
  • a female screw portion may be provided on the inner peripheral surface of the end portion of the diffuser part 20, and the male screw portion and the female screw portion may be screwed and connected.
  • the outflow path 18 of the pressurized medium in the part 20 of the diffuser is closed by a rupturable plate 19, and before operation, the internal space 16 of the inflation overnight housing 12 has a high pressure. It is kept airtight.
  • the diffuser part 20 is provided with an igniter 25 provided with an igniter as a means for destroying the rupturable plate 19.
  • the igniter 25 is attached after connecting the inflation overnight housing 12 and the diffuser part 20, and is fitted in a direction from the one end opening of the diffuser part 20 toward the rupturable plate 19. After the fitting, the diffuser part 20 is fixed by caulking the peripheral edge 28 of the one end opening.
  • the igniter 25 is mounted coaxially with the central axis of the inflation housing 12.
  • a cap 40 is attached to the diffuser part 20 so as to cover the outer surface including the first gas outlet 22.
  • the cap 40 has a minimum diameter portion 41 a, 41 b provided on both sides in the length direction, a maximum diameter portion 43 provided at the center in the length direction, and a minimum diameter portion 41 a, 4. It is a barrel-shaped member having step portions 42 a and 42 b provided between 1 b and the maximum diameter portion 43.
  • the cap 40 has a minimum diameter portion 41b caulked and is fixed in the ring groove 31. It is desirable to provide a flat surface or a depression on the outer surface side of the minimum diameter portion 41a in consideration of the connectivity at the time of airbag attachment.
  • a distribution space 46 composed of the outer peripheral surface of the part of the diffuser 20 and the maximum diameter part 4 3 of the steps 42a and 42b is formed. Has been done. Therefore, after the pressurized medium ejected from the first gas outlet 22 flows into the distribution space 46, the pressurized medium flows out of the second gas outlet 45 provided in the steps 42a and 42b. As a result, the same amount of pressurized medium is ejected from all the second gas outlets 45.
  • the pressurized medium flowing into the distribution space 46 is ejected radially because the second gas outlet provided in the step portions 42a and 42b and the first gas outlet 222 are not directly opposed.
  • the second gas outlet 22 may be provided only in the stepped portion 42a or only in the stepped portion 42b in order to adjust the ejection direction of the pressurized medium according to the inflation and deployment direction of the airbag. In addition to this, it can be provided only on the maximum diameter portion 43, and further can be provided on the step portions 42a, 42b and the maximum diameter portion 43.
  • the diameter of the first gas outlets 22 is preferably smaller than the diameter of the second gas outlets 45, and the same applies when a plurality of each are provided. For this reason, the total opening area of the second gas outlets 45 is larger than the total opening area of the first gas outlets 22 and is adjusted to 1.5 times or more.
  • the two first gas outlets 2 are located at positions that are symmetrical in the radial direction. It is preferable to provide 2.
  • the cap 40 is fitted into the part of the diffuser 20 from the side of the igniter 25 and adjusted so that the minimum diameter portion 41b and the ring groove 31 match.
  • the end of the minimum diameter portion 4 la is in contact with the opening edge 28 of the part 20 of the diffuser, and the contact portion is provided with a 0 ring 30 in order to maintain airtightness.
  • the portion of the minimum diameter portion 41b of the cap 40 in FIG. 2 is swaged and fixed to the ring groove 31 as shown in FIG.
  • the airbag device using the inflation overnight 10 includes an operation signal output means including an impact sensor and a control unit, and the inflation overnight 10 and the curtain-shaped airbag 50 are housed in a case.
  • This is a combination with a module case and the like, and for example, can have the same configuration as that shown in FIG. 17 of Japanese Patent Application Laid-Open No. 11-334517.
  • the igniter 25 When the vehicle receives an impact, the igniter 25 is activated in response to a signal from the impact sensor, and the igniter is ignited and burns, so that the rupturable plate 19 is destroyed. Since the flow path 18 of the pressurized medium is opened by the destruction of the rupturable plate 19, the pressurized medium in the internal space 16 passes through the flow path 18 and the filter 29, and passes through the first gas outlet 2 After flowing from 2 into the distribution space 46, it is ejected through the second gas outlet 45 to inflate the airbag. At this time, the fragments of the rupture disk 19 are removed by the filter 29.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un insufflateur à calotte permettant une installation aisée de la calotte, la surface externe d'une partie de diffuseur (20) comprenant des premières sorties de gaz (22) étant recouverte par la calotte (40) présentant des secondes sorties de gaz (45). La calotte (40) est fixée dans une rainure annulaire (31) pratiquée dans la partie de diffuseur (20) par l'intermédiaire du matage de la partie de diamètre minimal (41b).
PCT/JP2003/003342 2002-03-19 2003-03-19 Insufflateur a calotte WO2003078215A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002-75554 2002-03-19
JP2002075554 2002-03-19
JP2002-163992 2002-06-05
JP2002163992A JP2003341467A (ja) 2002-03-19 2002-06-05 キャップ付きインフレータ

Publications (1)

Publication Number Publication Date
WO2003078215A1 true WO2003078215A1 (fr) 2003-09-25

Family

ID=28043763

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/003342 WO2003078215A1 (fr) 2002-03-19 2003-03-19 Insufflateur a calotte

Country Status (2)

Country Link
JP (1) JP2003341467A (fr)
WO (1) WO2003078215A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220324410A1 (en) * 2019-08-27 2022-10-13 ZF Ainbag Germany GmnH Diffusor for a gas generator, gas generator with such diffusor and manufacturing method for such diffusor
US20220340100A1 (en) * 2019-08-27 2022-10-27 Zf Airbag Germany Gmbh Assembly group consisting of a cap of a tubular gas generator and a deflector element, tubular gas generator and method for manufacturing a tubular gas generator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2417066B (en) * 2004-08-13 2006-12-06 Autoliv Dev Improvements in or relating to an inflator for an air-bag
JP2010264965A (ja) * 2009-05-18 2010-11-25 Chung-Shan Inst Of Science & Technology 車両用人身保護装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05201304A (ja) * 1991-09-20 1993-08-10 Trw Vehicle Safety Syst Inc 膨張器アセンブリ
JPH10315900A (ja) * 1997-05-15 1998-12-02 Daicel Chem Ind Ltd エアバッグ用ガス発生器及びエアバッグ装置
JPH11512048A (ja) * 1995-08-31 1999-10-19 ティーアールダブリュ エアバッグ システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディトゲゼルシャフト 保護装置を充満させる装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05201304A (ja) * 1991-09-20 1993-08-10 Trw Vehicle Safety Syst Inc 膨張器アセンブリ
JPH11512048A (ja) * 1995-08-31 1999-10-19 ティーアールダブリュ エアバッグ システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディトゲゼルシャフト 保護装置を充満させる装置
JPH10315900A (ja) * 1997-05-15 1998-12-02 Daicel Chem Ind Ltd エアバッグ用ガス発生器及びエアバッグ装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220324410A1 (en) * 2019-08-27 2022-10-13 ZF Ainbag Germany GmnH Diffusor for a gas generator, gas generator with such diffusor and manufacturing method for such diffusor
US20220340100A1 (en) * 2019-08-27 2022-10-27 Zf Airbag Germany Gmbh Assembly group consisting of a cap of a tubular gas generator and a deflector element, tubular gas generator and method for manufacturing a tubular gas generator
US11945397B2 (en) * 2019-08-27 2024-04-02 Zf Airbag Germany Gmbh Assembly group consisting of a cap of a tubular gas generator and a deflector element, tubular gas generator and method for manufacturing a tubular gas generator
US11951930B2 (en) * 2019-08-27 2024-04-09 ZF Airbag Germany GmnH Diffusor for a gas generator, gas generator with such diffusor and manufacturing method for such diffusor

Also Published As

Publication number Publication date
JP2003341467A (ja) 2003-12-03

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