CN1923577A - Gas generator - Google Patents
Gas generator Download PDFInfo
- Publication number
- CN1923577A CN1923577A CNA2006101263584A CN200610126358A CN1923577A CN 1923577 A CN1923577 A CN 1923577A CN A2006101263584 A CNA2006101263584 A CN A2006101263584A CN 200610126358 A CN200610126358 A CN 200610126358A CN 1923577 A CN1923577 A CN 1923577A
- Authority
- CN
- China
- Prior art keywords
- diameter portion
- gas
- cartridge filter
- combustion chamber
- gas generator
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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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
-
- 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
- B60R2021/26011—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 a filter through which the inflation gas passes
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The present invention provides a gas generator including a housing formed by a closure shell and a diffuser shell having a gas discharge port, a combustion chamber provided inside the housing and charged with a gas generating agent, an ignition device to ignite and burn the gas generating agent inside the combustion chamber, a cylindrical filter disposed to face the gas discharge port and having an annular upper surface press-contacting a ceiling surface of the housing, a retainer disposed inside the combustion chamber to support the cylindrical filter, the retainer being substantially a cylinder, having a larger diameter portion and a smaller diameter portion, that is provided with a vent hole, as well as an annular surface portion provided between the larger diameter portion and the smaller diameter portion, an outer peripheral surface of the larger diameter portion abutting against an inner wall surface of the housing before activation and press-contacting the inner wall surface of the housing in activation, the annular surface portion press-contacting an annular lower surface of the cylindrical filter and an outer peripheral surface of the smaller diameter portion abutting against an inner peripheral surface of the cylindrical filter, a lower end portion of the larger diameter portion press-contacting the inner peripheral surface of the housing.
Description
Technical field
The present invention relates to the gas generator that gas-bag system is used.
Background technology
As the filter of one of component parts of the employed gas generator of gas-bag system of automobile, it has the function of the solid constituent that contains in the function of burning gases of cooling down high-temperature and the filtration combustion gas.So when gas generator moved, gas generant burning and the high-temperature gas that produces flowed in the air bag after being cooled by filter and filtering.
Yet, even under the situation that the filtration and the refrigerating function of filter are given full play to, when burning gases occurring and do not flow in the air bag, can might injure driver and crew owing to flow into the interior high-temperature gas of air bag and combustion residue by filter and bypass (Short-pass).
For preventing such bypass, though can make the quality of filter become big like this, thereby can't tackle the requirement of gas generator weight-saving with filter blanket gas generator inside as far as possible in large area.
Can be listed below as the prior art relevant with the present invention: reality is opened flat 7-31518 communique, the spy opens flat 5-178157 communique and the spy opens flat 10-81190 communique.
Open in the invention of flat 7-31518 communique real, container itself partly is out of shape, at the part riveted and fixed filter of distortion, its complex structure.
Open in the invention of flat 5-178157 communique the spy, will fix with diffusion aureole from bottom surface to a plurality of filters of end face of shell, but can not fully realize the lightweight this point.
Open in the invention of flat 10-81190 communique the spy, cooling and above the filter element 7 and between the loam cake and cooling and filter element 7 below and lower cover 2a above between dispose sealing element 10a, the 10b of graphite system, in addition, section be first and second bypass of ring-type of L font prevent that parts 15 and 16 are configured to that the inner face of both ends of the surface up and down with cooling and filter element 7 joins and with the inner face butt of loam cake 1a and lower cover 2a, though can utilize their combination to prevent bypass, but number of components is many, the packing engineering complexity.
Summary of the invention
The present invention relates to a kind of gas generator, it comprises: shell, the diffusion shell that it comprises closed cap and has gas discharge outlet; Combustion chamber, it is located in the described shell and is filled with gas generant; Ignition device, it is used to make the gas generant in the described combustion chamber fire burns; Cartridge filter, its disposes relative with described gas discharge outlet, it is crimped on above ring-type on the described outer casing top surface; And baffle plate, it is configured in the described combustion chamber and is used to support described cartridge filter, described baffle plate is tubular roughly, the minor diameter part that it possesses large-diameter portion and has vent, between described large-diameter portion and described minor diameter part, has the ring-shaped flat face, wherein, the outer peripheral face of described large-diameter portion is before gas generator action and described outer casing inner wall face butt, when moving, gas generator is crimped on the described outer casing inner wall face, described ring-shaped flat face is crimped on below the ring-type of described cartridge filter, the inner peripheral surface butt of the outer peripheral face of described minor diameter part and described cartridge filter, the bottom of described large-diameter portion are crimped on the described outer casing inner wall face.
The present invention relates to a kind of gas generator, it can prevent the generation of burning gases bypass, and can make the filter miniaturization and by baffle plate and combination of filters with given shape.
Combustion chamber can be one, also can be more than two or two.When the combustion chamber that is provided with more than two or two, dispose suitable partition member in the enclosure.Gas generant can be known, and its shape, material, composition etc. are not particularly limited.Ignition device can be only to use the structure of known electronic type firing unit and use any structure in the structure of combination of known electronic type firing unit and known flame intensifier.Cartridge filter can be the structure of and compression molding stacked metal gauze or metal wool is wound on the core and the known structures such as structure that are shaped.
The crimping of baffle plate partly is meant the state of baffle plate and outer casing inner wall face or cartridge filter driving fit.
The abutment portion of baffle plate is meant that baffle plate and outer casing inner wall face or cartridge filter are not driving fit but state of contact (yet can have small gap).The upper end of the minor diameter part of baffle plate and outer casing top surface (diffusion shell end face) butt.
When the action owing to ignition device burns gas generant in the combustion chamber to produce gas, the rising of pressing in being subjected to and baffle plate integral body is pushed laterally.Its result is by the internal face of the outer peripheral face of large-diameter portion pushing closed cap, by the inner peripheral surface of the outer peripheral face pushing cartridge filter of minor diameter part, by the pushing closed cap bottom surface, bottom of large-diameter portion.At this moment, though,, do not become crimped status so do not need to make between the upper end of minor diameter part and the diffusion shell end face because the upper surface of cartridge filter is crimped on the diffusion shell end face also by the upper end of minor diameter part pushing diffusion shell end face.
Therefore, the gas that in combustion chamber, produces at the vent by minor diameter part reliably (according to different situations, its part between the upper end of minor diameter part and diffusion shell end face by) be transported to cartridge filter and be filtered and cool off after, be discharged from from gas discharge outlet.Therefore, described gas can not take place is not discharged by bypass ground from gas discharge outlet by cartridge filter.
Like this, utilize the effect of the baffle plate of given shape, can prevent in the bypass of the gas that in combustion chamber, produces, and gas can be directed in the cartridge filter, therefore, can under the filtration of keeping filter and refrigerating function unmodified situation, make cartridge filter miniaturization and more.
From intensity and elastomeric viewpoint, preferably baffle plate is made of aluminium, corrosion-resistant steel, iron etc.The thickness of baffle plate can consider that the quality of cartridge filter adjusts, with obtain can be during effective tenure of use of vehicle the intensity of internal support cartridge filter degree.
And then, the present invention relates to a kind of gas generator, wherein, on described baffle plate, the bottom of described large-diameter portion has inside flange part, and the upper end of described minor diameter part has inside flange part, and the flange part of described large-diameter portion is crimped on described closed cap bottom surface.
By flange part is set in this wise, when gas generator moves,, make the upper end of minor diameter part and the area of contact of diffusion shell end face become big owing to can improve the adaptation of the bottom and the closed cap bottom surface of large-diameter portion, therefore make baffle plate be difficult to the changing of the relative positions.
And then, the present invention relates to a kind of gas generator, wherein, the height of the described diffusion shell of aspect ratio of described cartridge filter is little.
By making the further miniaturization and of cartridge filter, can make the whole lightweight of gas generator.
According to gas generator of the present invention, because by using the baffle plate of given shape, can make the filter miniaturization and under the situation of bypass function keeping filtration and refrigerating function and prevent, therefore can make the whole lightweight of gas generator.In addition, because number of components is also few, so Fabrication procedure is simplified.
Description of drawings
The following description and accompanying drawing only are in order to understand the present invention better, but the present invention is not limited to these embodiment and accompanying drawing.
Fig. 1 is the longitudinal diagram of gas generator of the present invention.
The specific embodiment
With reference to Fig. 1 the present invention is described.Fig. 1 is the longitudinal diagram of gas generator 10 of the present invention.
The shell utilization of gas generator 10 is formed by the shell 13 that closed cap 11 and diffusion shell 12 constitute.On diffusion shell 12, be provided with from the inboard by the different a plurality of gas discharge outlets 15,16 of diameter of obstructions such as aluminium strip bar.
Central portion in shell 13 disposes inner core 18.The upper end open portion periphery of inner core 18 is crimped on the end face 12a of diffusion shell 12.The bottom side of inner core 18 is inserted in the hole of the central portion that is arranged on closed cap 11.
Opening embedding in the bottom of inner core 18 side has first firing unit 22 and the secondary igniter 23 that is fixed on the metallic lining 21.Metallic lining 21 is fixed by the peristome periphery 18a of riveted joint inner core 18.
Igniting portion at first firing unit 22 disposes the first flame intensifier 24 that is filled in the aluminium box, disposes the second flame intensifier 25 in the igniting portion of secondary igniter 23.Between the first flame intensifier 24 and the second flame intensifier 25 and 23 of the first flame intensifier 24 and secondary igniters separate by next door 26.Therefore, the secondary igniter 23 and the second flame intensifier 25 are affected.The second flame intensifier 25 is filled in the space that is surrounded by next door 26 and the push part 27 with a plurality of vents 28.
The tubular space that is surrounded by shell 11 and inner core 18 becomes first combustion chamber 30, and portion is filled with the first not shown gas generant within it.First combustion chamber 30 utilizes the volume adjustment to be adjusted volume with baffle plate (リ テ one Na) 39 loadings according to first gas generant.
The space that is surrounded by inner core 18 and push part 27 becomes second combustion chamber 35, and portion is filled with the second not shown gas generant within it.Also can dispose the known automatic ignition material that constitutes by cellulose nitrate etc. as required at second combustion chamber 35.Second combustion chamber 35 is communicated with by second intercommunicating pore of being located on the inner core 18 20 with first combustion chamber 30.Second intercommunicating pore 20 from the inboard by obstructions such as aluminium strip bars.
In first combustion chamber 30, dispose cartridge filter 38.The height of the aspect ratio diffusion shell 12 of cartridge filter 38 is low, it can use spiral filter, wire gauzee filter, with the filter of the type of spiral filter and metal cloth filter combination, the material of filter silk thread is iron, cast iron, dead-soft steel, corrosion-resistant steel, copper, nickel alloy, copper alloy etc.
Baffle plate 40 has large-diameter portion 41 and the minor diameter part 42 littler than large-diameter portion 41 diameters, has ring-shaped flat face 43 between large-diameter portion and minor diameter part 42.Be provided with a plurality of vents 44 at minor diameter part 42.
The internal face butt of the outer peripheral face of large-diameter portion 41 and closed cap 11 is from the bonding part 14 of covering closed cap 11 in inboard with diffusion shell 12.
Ring-shaped flat face 43 has and the equal or equal above width of the thickness of cartridge filter 38 at least, and it is crimped on 38a below the ring-type of cartridge filter 38.38b is crimped on the diffusion shell end face 12a above the ring-type of cartridge filter 38.
The bottom of large-diameter portion 41 has inside flange part 45, and flange part 45 is crimped on the 11a of closed cap bottom surface.The shape of flange part 45 can be a shape as shown in the figure, also can be the shape consistent with the interior shape of closed cap 11.
The upper end of minor diameter part 42 has inside flange part 46, flange part 46 and diffusion shell end face 12a butt, the periphery wall butt of leading section and inner core 18.Like this, because the periphery wall butt of flange part 46 and diffusion shell end face 12a and inner core 18, institute is so that baffle plate 40 itself is difficult to the changing of the relative positions.
In addition, support fixedly cartridge filter 38 by ring-shaped flat facial 43 and diffusion shell end face 12a from clipping and push cartridge filter 38 up and down, thereby prevent its changing of the relative positions by baffle plate 40.
Below, the action in the gas-bag system that gas generator 10 is assembled to automobile the time describes.In addition, below the situation that first firing unit 22 and secondary igniter 23 were moved with the small time difference is described.
When being subjected to clashing into, accept signal from control unit when auto against, first firing unit 22 move igniting and make the first flame intensifier 24 fire burns, thereby produce flame etc.Described flame etc. flow in first combustion chamber 30 from first connecting bore 19, make first gas generant fire burns, thereby produce gas.
In first combustion chamber 30, owing to the gas that produces presses to rise in making baffle plate 40 is urged, therefore by flange part 45 pushing closed cap bottom surface 11a, by the part of the internal perisporium of the internal perisporium of large-diameter portion 41 pushing closed cap 11, junction surface 14, diffusion shell 12, and by flange part 46 pushing diffusion shell end face 12a.And then owing to utilize ring-shaped flat facial 43 and minor diameter part 42 pushing cartridge filters 38, so the adaptation of 38b and diffusion shell end face 12a further improves above the ring-type of cartridge filter 38.
Therefore, all gas that produces in first combustion chamber 30 can bypass, and supplies to cartridge filter 38 by the vent 44 of being located at minor diameter part 42.And, after being filtered by cartridge filter 38 and cooling off, break through aluminium strip bar etc. and be discharged from from gas discharge outlet 15,16, make airbag inflation.
Secondary igniter 23 a little lingeringly moves igniting, make the second flame intensifier 25 fire burns and produce flame etc.Described flame etc. flow in second combustion chamber 35 from vent 28, make second gas generant fire burns, thereby produce gas.
The gas that produces in second combustion chamber 35 flows in first combustion chamber 30 from second intercommunicating pore 20, and the pressure in first combustion chamber 30 is raise.Therefore, brought into play the anti-bypass action of baffle plate 40, made gas supply to cartridge filter 38 by the vent of being located on the minor diameter part 42 44.And, after being filtered by cartridge filter 38 and cooling off, be discharged from from gas discharge outlet 15,16, air bag is further expanded.
Like this, be specific shape and the interior pressure of utilizing first combustion chamber 30 by making baffle plate 40, can under the filtration of keeping cartridge filter 38 and refrigerating function unmodified situation, prevent bypass reliably, and can make cartridge filter 38 miniaturization more.
Though more than describe the present invention, it can adopt variety of way obviously.But these changes all can not be regarded as and break away from idea of the present invention and scope.All changes to those skilled in the art are included in the scope of technical scheme of the present invention.
Claims (3)
1, a kind of gas generator, it comprises:
Shell, the diffusion shell that it comprises closed cap and has gas discharge outlet;
Combustion chamber, it is located in the described shell and is filled with gas generant;
Ignition device, it is used to make the gas generant in the described combustion chamber fire burns;
Cartridge filter, its disposes relative with described gas discharge outlet, it is crimped on above ring-type on the described outer casing top surface; And
Baffle plate, it is configured in the described combustion chamber, be used to support described cartridge filter, described baffle plate is tubular roughly, the minor diameter part that it possesses large-diameter portion and has vent, between described large-diameter portion and described minor diameter part, has the ring-shaped flat face, wherein, the outer peripheral face of described large-diameter portion is before gas generator action and described outer casing inner wall face butt, when moving, gas generator is crimped on the described outer casing inner wall face, described ring-shaped flat face is crimped on below the ring-type of described cartridge filter, the inner peripheral surface butt of the outer peripheral face of described minor diameter part and described cartridge filter, and the bottom of described large-diameter portion is crimped on the described outer casing inner wall face.
2, gas generator as claimed in claim 1, it is characterized in that on described baffle plate, the bottom of described large-diameter portion has inside flange part, the upper end of described minor diameter part has inside flange part, and the flange part of described large-diameter portion is crimped on described closed cap bottom surface.
3, gas generator as claimed in claim 1 or 2 is characterized in that, the height of the described diffusion shell of aspect ratio of described cartridge filter is little.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005248593A JP4594830B2 (en) | 2005-08-30 | 2005-08-30 | Gas generator |
| JP248593/05 | 2005-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1923577A true CN1923577A (en) | 2007-03-07 |
| CN100581881C CN100581881C (en) | 2010-01-20 |
Family
ID=37715745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610126358A Active CN100581881C (en) | 2005-08-30 | 2006-08-30 | Gas generator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4594830B2 (en) |
| CN (1) | CN100581881C (en) |
| DE (1) | DE102006039496B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087762A (en) * | 2016-12-16 | 2019-08-02 | 株式会社大赛璐 | Fixing piece and gas generator |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242004B (en) * | 2011-05-20 | 2013-05-29 | 汤成忠 | Automatic and efficient coal gas producer |
| JP2013019347A (en) * | 2011-07-12 | 2013-01-31 | Nihon Glassfiber Industrial Co Ltd | Metal wire compressed body |
| JP5922956B2 (en) | 2012-03-12 | 2016-05-24 | 株式会社ダイセル | Gas generator |
| JP6276110B2 (en) | 2014-05-09 | 2018-02-07 | 株式会社ダイセル | Gas generator and assembly method |
| JP6951182B2 (en) | 2016-12-16 | 2021-10-20 | 株式会社ダイセル | Retainer and gas generator |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH039569U (en) * | 1989-06-12 | 1991-01-29 | ||
| JPH05305854A (en) | 1991-06-21 | 1993-11-19 | Daicel Chem Ind Ltd | Sheet structural gas generator |
| JPH05178157A (en) * | 1992-01-08 | 1993-07-20 | Daicel Chem Ind Ltd | Gas generator for air bag |
| JPH0570636U (en) * | 1992-03-05 | 1993-09-24 | センサー・テクノロジー株式会社 | Gas generator |
| JP2532843Y2 (en) * | 1993-06-29 | 1997-04-16 | センサー・テクノロジー株式会社 | Gas generator for airbag |
| JPH0731518U (en) | 1993-11-24 | 1995-06-13 | センサー・テクノロジー株式会社 | Gas generator |
| WO1996010495A1 (en) * | 1994-09-30 | 1996-04-11 | Sensor Technology Co., Ltd. | Gas generator for air bag |
| DE19505580A1 (en) * | 1995-02-18 | 1996-08-22 | Dynamit Nobel Ag | Gas generator in sheet metal construction for a motor vehicle occupant protection device |
| US5582427A (en) | 1995-06-28 | 1996-12-10 | Morton International, Inc. | Dual-wall pyrotechnic air bag inflator with tortuous gas flow |
| US5659150A (en) * | 1996-04-17 | 1997-08-19 | Trw Inc. | Gas generating composition with cyanamide and transition metal nitrate |
| JP3677949B2 (en) | 1996-07-17 | 2005-08-03 | 日本化薬株式会社 | Gas generator for airbag |
| JP4494023B2 (en) | 2004-01-15 | 2010-06-30 | ダイセル化学工業株式会社 | Gas generator for airbag |
| US7390019B2 (en) | 2004-06-10 | 2008-06-24 | Daicel Chemical Industries, Ltd. | Inflator for airbag |
-
2005
- 2005-08-30 JP JP2005248593A patent/JP4594830B2/en active Active
-
2006
- 2006-08-23 DE DE102006039496.8A patent/DE102006039496B4/en active Active
- 2006-08-30 CN CN200610126358A patent/CN100581881C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087762A (en) * | 2016-12-16 | 2019-08-02 | 株式会社大赛璐 | Fixing piece and gas generator |
| CN110087762B (en) * | 2016-12-16 | 2022-04-15 | 株式会社大赛璐 | Fixing piece and gas generator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4594830B2 (en) | 2010-12-08 |
| CN100581881C (en) | 2010-01-20 |
| JP2007062461A (en) | 2007-03-15 |
| DE102006039496A1 (en) | 2007-03-01 |
| DE102006039496B4 (en) | 2022-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Osaka Japan Patentee after: Daicel Chem Address before: Osaka Japan Patentee before: Daicel Chemical Industries Co., Ltd. |