WO2007148542A1 - リテーナ及びインフレータ - Google Patents
リテーナ及びインフレータ Download PDFInfo
- Publication number
- WO2007148542A1 WO2007148542A1 PCT/JP2007/061543 JP2007061543W WO2007148542A1 WO 2007148542 A1 WO2007148542 A1 WO 2007148542A1 JP 2007061543 W JP2007061543 W JP 2007061543W WO 2007148542 A1 WO2007148542 A1 WO 2007148542A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- retainer
- inflator
- gas
- filter
- pressure
- Prior art date
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
- B60R21/264—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 generation of gas, e.g. pyrotechnic
- B60R21/2644—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 generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/26—Arrangements for mounting initiators; Accessories therefor, e.g. tools
Definitions
- the present invention relates to a retainer that is one of the components of an inflator that generates gas to be supplied to an airbag installed in an automobile as a safety device, and an inflator including the retainer.
- An airbag device is configured with an inflator, which is a gas generation device, and an airbag force.
- the airbag is deployed by gas generated by the inflator, thereby protecting an occupant from an impact at the time of a collision. is there.
- a general inflator 1 includes an ignition means 3 that operates in an electric signal generated after a collision is detected in a pressure vessel 2 that includes a diffuser 2a and a shallow dish base 2b.
- a gas generating agent 4 ignited by the ignition means 3 is incorporated.
- the ignition means 3 includes, for example, an igniter 3a and a transfer charge 3b.
- the gas generating agent 4 burns to instantly generate harmless gas, and the gas is discharged through the filter 5 through the filter 5 aa.
- the diffuser 2a and the base 2b are welded as shown in Fig. 7 (b) from a separate state before welding shown in Fig. 7 (a).
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-334517
- FIG. 1 When welding the inflator 1, in order to prevent the filter 5 from falling off and the gas generating agent 4 from spilling out from the base 2b, a tube 6 separating the ignition means 3 and the gas generating agent 4 is shown in FIG.
- the plate-like retainer 7 is fixed, and the filter 5 and the gas generating agent 4 are held.
- the retainer 7 also serves to prevent gas leakage between the inner surface of the diffuser 2a and the filter 5 when the inflator 1 is operated.
- the pressure vessel of the inflator is used to adjust the combustion pressure of the gas generant during operation of the inflator. Therefore, it expands greatly. Along with this, the retainer also expands greatly outward as shown in FIG. 10 from the state before the inflator operation shown in FIG.
- the retainer 7 provided with a flange 7a on the outer peripheral portion is effective as shown in FIG.
- the first is that it needs to be made in a shape that allows the ridges to enter the interior of the filter when attached. This complicates the shape of the retainer.
- high manufacturing accuracy is required for the positional relationship with the fitting part of the tube, making it difficult to manufacture and greatly increasing manufacturing costs.
- the problem to be solved by the present invention is that a large gap between the filter and the retainer formed when the inflator is activated closes the large gap between the retainer and the conventional retainer. The alignment is very difficult.
- the retainer of the present invention comprises:
- a plate-like retainer that is inserted into a pressure vessel of an inflator that generates gas to be supplied to an airbag, In the center portion, a fitting portion is formed between the ignition means and a tube arranged in the pressure vessel that partitions the gas generating agent,
- the most important feature is that at least one pressure release hole is provided on the outer periphery of the fitting.
- the gas passage becomes long so that gas passes between the retainer and the filter.
- the pressure between the retainer and the pressure vessel is reduced. Since it distributes uniformly, it is preferable.
- the pressure release holes are provided on a plurality of circumferences, the pressure distribution between the retainer and the pressure vessel can be preferably achieved. It is preferable to provide the pressure release hole on a circle with a constant radius, because the pressure is less likely to escape from the retainer.
- a fitting portion with a tube is formed in the central portion, and at least one pressure release hole is provided on the outer peripheral side from the fitting portion.
- the present invention can reduce the deformation of the retainer due to the combustion pressure, can maintain a close contact state between the retainer and the filter, and is included in the gas discharged to the outside of the pressure vessel gas discharge hole inflator. Solid residue can be reduced.
- FIG. 1 is a view of a retainer according to the present invention as viewed obliquely from above. 2] A view of the state before welding in which the retainer of the present invention is attached to the base, as viewed obliquely from above.
- FIG. 5 is a view of the state where the diffuser is removed after the inflator of the present invention is operated, and the oblique upward force is also seen.
- FIG. 7 A cross-sectional view illustrating the structure of the inflator, where (a) shows the pressure vessel before welding and (b) shows the pressure vessel after welding.
- FIG. 9 A view before the inflator is actuated, showing the state before welding with the retainer attached to the base as viewed obliquely from above.
- FIG. 12 is a cross-sectional view showing a state in which a retainer with a hook is attached.
- a retainer having a flange on the outer peripheral portion is considered to be effective in closing a large gap between the filter and the retainer formed when the inflator is activated.
- this retainer has a complicated shape and requires high manufacturing accuracy, and is not easy to manufacture. Furthermore, it is very difficult to align the filter and the retainer.
- the present invention has a simple structure, is easy to manufacture, and prevents gas leakage between the retainer and the filter as much as possible from the fitting portion with the tube formed at the center. This is realized by providing at least one pressure release hole.
- FIG. 1 is a view of the retainer of the present invention as viewed from obliquely above
- Fig. 2 is a view of the state before welding with the retainer of the present invention attached to the base as viewed from obliquely above
- Fig. 3 is a view of attaching the retainer of the present invention.
- FIG. 4 is a diagram for explaining a mechanism for reducing the amount of residue in the inflator of the present invention
- FIG. 4 is a diagram for explaining a mechanism for reducing the amount of residue in the inflator of the present invention
- the retainer 11 of the present invention has a fitting portion 11a for fitting and attaching to the tip end of the tube 6 disposed in the pressure vessel 2 at the center thereof.
- a fitting portion 11a for fitting and attaching to the tip end of the tube 6 disposed in the pressure vessel 2 at the center thereof.
- six pressure release holes 1 lb are provided on a constant radius circle on the outer peripheral side of the fitting portion 11a and above the insertion position of the gas generating agent 4.
- the number of diameters of the pressure release holes l ib that are desirably provided at equal positions in the circumferential direction so that the pressure balance on the front and back surfaces of the retainer is appropriately maintained is determined.
- a step portion 11c is further formed at the contact portion with the filter 5 on the outer peripheral side.
- the step portion 11c is formed in order to make the gas passage between the retainer 11 and the filter 5 longer and difficult to pass the gas. Therefore, it is not necessary to fit the filter 5 with high accuracy like the hook 7a of the retainer 7 with the hook shown in FIG. [0026]
- the retainer 11 of the present invention as described above has a simple structure in which only the stepped portion 11c is formed with the fitting portion 11a and the pressure release hole l ib if necessary. Since only the fitting portion 11a requires high manufacturing accuracy, manufacturing becomes easy and can be manufactured at low cost.
- the gas flow from the inside of the inflator 12 when the inflator 12 is operated is considered to be the following three. In the following, these three routes will be explained using Fig. 3.
- the gas escapes from the pressure release hole l ib provided in the retainer 11 to the upper part of the retainer 11.
- the gas passes through the gap between the inner periphery of the diffuser 2a and the retainer 11 and reaches the gas discharge hole 2aa (indicated by a thick solid arrow in FIG. 3).
- the first route is longer than the other two routes, the amount of flowing gas is considered to be small.
- the pressure release hole l ib since there is little solid residue passing through the pressure release hole l ib and through the gap between the inner periphery of the diffuser 2a and the retainer 11, even if the solid residue passes through the pressure release hole l ib, There is little possibility of solid residue being discharged out of the inflator 12
- the gas passes between the retainer 11 and the filter 5 and reaches the gas discharge hole 2aa of the pressure vessel 2 (indicated by a thick broken arrow in FIG. 3).
- the amount of gas passing through the second route increases, the amount of solid residue discharged out of the inflator 12 increases.
- This third route the gas passes through the filter 5 and reaches the gas discharge hole 2aa of the pressure vessel 2 (indicated by a white arrow in FIG. 3).
- This third route is considered to be the most easily routed route compared to the first and second routes, and is the most desirable route.
- the inflator 12 of the present invention a small amount of gas flows through the first route during operation, so that the pressure balance between the upper and lower sides of the retainer 11 is maintained, and the deformation of the retainer 11 due to the combustion pressure is reduced. (See Figure 4).
- the solid residue contained in the gas discharged from the gas discharge hole 2aa of the pressure vessel 2 through the first route to the outside of the inflator 12 is extremely small.
- the amount of residue discharged from the inflator to the outside can be greatly reduced by using the inflator to which the retainer of the present invention is attached. This means that when the inflator is activated, the gas flow from the inside of the inflator is correct, and the above explanation is correct.
- the force indicating the retainer 11 in which the step portion 11c is formed in the contact portion with the filter on the outer peripheral side For example, the step portion as shown in FIGS. It is not necessary to provide
- FIG. 5 and FIG. 6 show another modification of the pressure release hole l ib provided in the retainer 11.
- These pressure release holes l ib are provided on two circumferences, and are arranged in point symmetry with respect to the center of the retainer 11 in FIG. 5 and line symmetry with respect to the center line of the retainer 11 in FIG.
- These modifications are for maintaining the pressure balance between the front and back surfaces of the retainer appropriately, and a geometrically symmetrical arrangement is preferable for achieving an appropriate pressure balance.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800226059A CN101472772B (zh) | 2006-06-20 | 2007-06-07 | 保持器以及气体发生器 |
EP07744872A EP2033854B1 (en) | 2006-06-20 | 2007-06-07 | Retainer and inflator |
JP2008522383A JP5139284B2 (ja) | 2006-06-20 | 2007-06-07 | インフレータ |
US12/305,412 US7891703B2 (en) | 2006-06-20 | 2007-06-07 | Retainer and inflator |
US13/017,578 US8215670B2 (en) | 2006-06-20 | 2011-01-31 | Retainer and inflator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006170412 | 2006-06-20 | ||
JP2006-170412 | 2006-06-20 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/305,412 A-371-Of-International US7891703B2 (en) | 2006-06-20 | 2007-06-07 | Retainer and inflator |
US13/017,578 Continuation US8215670B2 (en) | 2006-06-20 | 2011-01-31 | Retainer and inflator |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007148542A1 true WO2007148542A1 (ja) | 2007-12-27 |
Family
ID=38833284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/061543 WO2007148542A1 (ja) | 2006-06-20 | 2007-06-07 | リテーナ及びインフレータ |
Country Status (5)
Country | Link |
---|---|
US (2) | US7891703B2 (ja) |
EP (1) | EP2033854B1 (ja) |
JP (1) | JP5139284B2 (ja) |
CN (1) | CN101472772B (ja) |
WO (1) | WO2007148542A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009149215A (ja) * | 2007-12-21 | 2009-07-09 | Daicel Chem Ind Ltd | ガス発生器 |
JP2010158988A (ja) * | 2009-01-08 | 2010-07-22 | Autoliv Nichiyu Co Ltd | エアバッグ装置用ガス発生器、ガス発生器の組み立て用治具及び、ガス発生器の組み立て方法 |
JP2010221750A (ja) * | 2009-03-19 | 2010-10-07 | Autoliv Nichiyu Co Ltd | エアバッグ用インフレータ |
JP2014184835A (ja) * | 2013-03-22 | 2014-10-02 | Autoliv Development Ab | エアバッグ用インフレータ |
WO2020050104A1 (ja) * | 2018-09-07 | 2020-03-12 | 株式会社ダイセル | ガス発生器及びガス発生器用のクッション部材 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007148542A1 (ja) * | 2006-06-20 | 2007-12-27 | Autoliv Nichiyu Co., Ltd. | リテーナ及びインフレータ |
WO2008084605A1 (ja) * | 2007-01-12 | 2008-07-17 | Autoliv Development Ab | エアバッグ装置 |
US8662532B2 (en) * | 2010-11-10 | 2014-03-04 | Autoliv Asp, Inc. | Inflator having a mechanically coupled two-piece housing |
JP5763000B2 (ja) * | 2012-03-19 | 2015-08-12 | 株式会社ダイセル | ガス発生器 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11334517A (ja) | 1997-12-26 | 1999-12-07 | Daicel Chem Ind Ltd | エアバッグ用ガス発生器及びエアバッグ装置 |
JP2001233167A (ja) * | 2000-02-22 | 2001-08-28 | Daicel Chem Ind Ltd | エアバッグ用ガス発生器のクーラント/フィルター手段支持部材及びそれを用いたエアバッグ用ガス発生器 |
JP2004507435A (ja) * | 2000-08-30 | 2004-03-11 | オートリブ エーエスピー,インコーポレイティド | ガス発生剤のインフレータ装置点火 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561675A (en) * | 1984-04-02 | 1985-12-31 | Morton Thiokol, Inc. | Auto ignition device |
JPH0672271A (ja) * | 1992-08-31 | 1994-03-15 | Takata Kk | エアバッグ装置のリテーナ |
JPH09207705A (ja) * | 1995-11-28 | 1997-08-12 | Nippon Kayaku Co Ltd | エアバッグ用ガス発生器及びその組立方法 |
US5951040A (en) * | 1997-03-19 | 1999-09-14 | Trw Inc. | Air bag inflator with pressure regulation |
JP2000016226A (ja) * | 1998-06-26 | 2000-01-18 | Daicel Chem Ind Ltd | エアバッグ用ガス発生器及びエアバッグ装置 |
US6290256B1 (en) * | 1999-03-04 | 2001-09-18 | Trw Inc. | Air bag inflator with pressure regulation |
US6257617B1 (en) * | 1999-03-04 | 2001-07-10 | Trw Inc. | Air bag inflator with pressure regulation |
CN1419504A (zh) | 2000-02-22 | 2003-05-21 | 大赛璐化学工业株式会社 | 气囊用气体发生器、偏流部件、冷却/过滤装置支撑部件、冷却器及壳体 |
EP1331143B1 (en) * | 2000-10-31 | 2012-08-08 | Daicel Chemical Industries, Ltd. | Gas generator for air bag and air bag device |
US6854395B2 (en) * | 2001-08-10 | 2005-02-15 | Daicel Chemical Industries, Ltd. | Inflator for an air bag |
US6886855B2 (en) * | 2002-05-31 | 2005-05-03 | Autoliv Asp, Inc. | Gas generant filter assemblies |
WO2007148542A1 (ja) * | 2006-06-20 | 2007-12-27 | Autoliv Nichiyu Co., Ltd. | リテーナ及びインフレータ |
-
2007
- 2007-06-07 WO PCT/JP2007/061543 patent/WO2007148542A1/ja active Application Filing
- 2007-06-07 US US12/305,412 patent/US7891703B2/en not_active Expired - Fee Related
- 2007-06-07 CN CN2007800226059A patent/CN101472772B/zh not_active Expired - Fee Related
- 2007-06-07 EP EP07744872A patent/EP2033854B1/en not_active Not-in-force
- 2007-06-07 JP JP2008522383A patent/JP5139284B2/ja not_active Expired - Fee Related
-
2011
- 2011-01-31 US US13/017,578 patent/US8215670B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11334517A (ja) | 1997-12-26 | 1999-12-07 | Daicel Chem Ind Ltd | エアバッグ用ガス発生器及びエアバッグ装置 |
JP2001233167A (ja) * | 2000-02-22 | 2001-08-28 | Daicel Chem Ind Ltd | エアバッグ用ガス発生器のクーラント/フィルター手段支持部材及びそれを用いたエアバッグ用ガス発生器 |
JP2004507435A (ja) * | 2000-08-30 | 2004-03-11 | オートリブ エーエスピー,インコーポレイティド | ガス発生剤のインフレータ装置点火 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2033854A4 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009149215A (ja) * | 2007-12-21 | 2009-07-09 | Daicel Chem Ind Ltd | ガス発生器 |
JP2010158988A (ja) * | 2009-01-08 | 2010-07-22 | Autoliv Nichiyu Co Ltd | エアバッグ装置用ガス発生器、ガス発生器の組み立て用治具及び、ガス発生器の組み立て方法 |
JP2010221750A (ja) * | 2009-03-19 | 2010-10-07 | Autoliv Nichiyu Co Ltd | エアバッグ用インフレータ |
JP2014184835A (ja) * | 2013-03-22 | 2014-10-02 | Autoliv Development Ab | エアバッグ用インフレータ |
WO2020050104A1 (ja) * | 2018-09-07 | 2020-03-12 | 株式会社ダイセル | ガス発生器及びガス発生器用のクッション部材 |
Also Published As
Publication number | Publication date |
---|---|
EP2033854B1 (en) | 2012-08-08 |
JPWO2007148542A1 (ja) | 2009-11-19 |
US20090200780A1 (en) | 2009-08-13 |
US7891703B2 (en) | 2011-02-22 |
EP2033854A1 (en) | 2009-03-11 |
JP5139284B2 (ja) | 2013-02-06 |
CN101472772B (zh) | 2011-04-20 |
CN101472772A (zh) | 2009-07-01 |
EP2033854A4 (en) | 2010-12-01 |
US20120025504A1 (en) | 2012-02-02 |
US8215670B2 (en) | 2012-07-10 |
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