JP2567583C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflatable impact protection bag for a vehicle, generally an air bag.
Gas generation mixing of solid fuels for gas generation for fast inflating purposes
The present invention relates to an expansion device or a gas generator that utilizes the combustion of an object. BACKGROUND OF THE INVENTION Many forms of gas generators or inflators are known that utilize a gas generating mixture of flammable solid fuel for inflating an inflatable impact protection bag. Such an expansion device
The general structure of the device is disclosed in US Pat. No. 4,547,342 to Adams et al.
As shown, the first chamber, the second chamber, and the second chamber are disposed concentrically within the housing.
It has three rooms. An ignition material is arranged in the innermost first chamber, and the first chamber
The gas generating material is arranged in the second chamber adjacent to the outside of the second chamber, and is adjacent to the outside of the second chamber.
A filter is arranged in the third chamber. In order to inflate the airbag, first, the ignition material in the first chamber is ignited and fired.
The generated ignition gas flows into the second chamber, and the ignition gas generates the gas in the second chamber.
The raw material is ignited, and the generated inflation gas flows into the third chamber.
Through the filter arranged in the third chamber to the outside of the housing.
I have. [0004] In the expansion device having the above-described structure, the ignition gas generated in the first chamber is directed radially.
Flow into the second chamber in the direction and proceed in the radial direction without dissipating in the second chamber,
It easily blows through the second chamber, and the ignition of the gas generating material in the second chamber becomes insufficient and gas
The entire generated material does not burn in a short time and the airbag cannot be inflated quickly.
No. [0005] Accordingly, an object of the present invention is to provide a gas generating material in an expansion device having the above-described structure.
The purpose of this is to burn the entire material in a short period of time and allow for quick inflation of the airbag. In order to achieve the above-mentioned object, inflators according to the present invention are substantially concentrically adjacent to each other.
The first chamber, the second chamber, and the third chamber, which are disposed in contact with each other, and the first chamber located at the innermost side.
An ignition material disposed therein and a gas generator disposed in a second chamber adjacent to the outside of the first chamber.
A raw material; and a filter disposed in the third chamber adjacent to the outside of the second chamber.
An ignition gas generated by igniting the ignition material in the first chamber flows into the second chamber; and the ignition gas ignites the gas generation material in the second chamber.
The generated inflation gas is caused to flow into the third chamber, and the inflation gas is supplied into the third chamber.
For inflator of vehicle inflatable shock protection bag which flows out through filter
The ignition gas flowing radially from the first chamber into the second chamber is axially displaced.
And a deflecting means for deflecting the light into the light. [0007] The above and other objects, features, and advantages of the present invention will be apparent from the following description, taken in conjunction with the accompanying drawings.
The following detailed description of the preferred embodiments of the invention will be apparent. Referring to the drawings, there is shown an inflatable shock protection bag for a vehicle, ie, a gas bag or airbag.
Provides gas to quickly inflate what is commonly known as an urbag
The inflator or gas generator used to do so is indicated generally at 10. expansion
The device 10 has a generally cylindrical outer shape and a storage structure 1 having two components.
2, that is, including the housing. Each of these components has a light weight
Lower or first element 14 and upper or second element 1 made of aluminum to provide
6. Elements 14 and 16 form storage structure 12 of inflator assembly 10.
For this purpose, they are joined by two coaxial friction welds, designated 18 and 20. these
The two welds 18 and 20 are performed simultaneously in a single friction welding operation. Friction welding
The process is described in more detail in the aforementioned Adams et al. Patent. [0009] The lower element or base 14 is formed by forging or drawing or other suitable means.
And a weld 18 to define a second chamber therein, also referred to as a combustion chamber 26.
One cylinder 22 which is fitted and friction welded with the mounting surface 24 of the upper element 16
That is, it has a first side wall. The upper element 16 may be forged or drawn or otherwise suitable.
Molded by any suitable means, coaxial with the cylinder 22 and located externally, and
Inner and outer cylinders that are compatible with the mounting surface 30 of the
To form an annular third chamber, referred to as a diffusion chamber 32, between the hoppers 22 and 28
A cylinder 28, which is welded to the base by a weld 20, ie, a second side wall. However, in accordance with the present invention, one component may be attached to another component.
That each cylinder may have a correspondingly welded cylinder
Is understood. The base 14 is such that all ignition techniques will become clearer below.
The inner cylinder 22 is inserted into the base 14 for easier friction welding.
It is preferred to have Further, the upper element 16 comprises an outer cylinder to the base 14.
28 welds 20 suitably hold the divider packs in the diffusion chamber 32 described below.
It is preferred to have an outer cylinder 28 to help assist. The base element 14 acts as a mounting post projecting inward from the center of the combustion chamber 26.
The knob 34 is formed to have a generally cylindrical member or knob 34. Called the ignition tube
The thin tubular member 36 is press-fitted or otherwise suitable to the cylindrical surface of the mounting post 34.
Attached and substantially extending but separated without reaching the upper element 16,
Its upper end is closed by aluminum or other suitable material 38 and the cap is closed.
In order to define a first chamber called an ignition chamber 40 in the center of the combustion chamber 26,
During the next assembly operation, the ignition material was inserted to prevent spilling of the ignition material 50.
It is later pressed. Thus, the ignition tube 36 is welded to the upper or second component.
Attached to the lower or first component, but the ignition tube 36 is attached to the upper or
The first and second components 14 and 14 are separated from the second component 16.
And 16 are joined by only two welded joints, so that the friction welding operation
Simplified for easier production of zero. The ignition tube 36 is made of stainless steel or charcoal.
It is made of steel or other suitable material that can withstand the heat of the ignition chamber 40. A conventional initiator or squib 44 extends through center hole 42 of knob 34
The device is connected to the device by a connector 47 and is also
External shock sensor means (not shown) for electrically pressurizing the device
The current flowing through a pair of electrical pressure leads 46 suitable for plugging
Pressurized. The following is used as a black powder or ignition material 50
A suitable ignition material, such as one through an appropriate bridge or resistance wire in contact therewith
Included within the squib 44 to be ignited by the flowing current. The squib 44 ignites through the hole 60. Reaction initiator or squib, this specification and patent application
Sparks or hot gases to ignite other ignition materials for the purposes of the
Formed as a device containing igniting material in contact with the electric bridge or resistance wire
. The squib 44 abuts a similarly shaped surface of the center hole 42, as shown in FIG.
, Having a conical portion 48 suitably held by a portion of the crimped knob 34
A fire device 44 extends from a portion of the knob 34 to the ignition chamber 40. A dose of ignition material 50 is contained around ignition device 44 in ignition chamber 40.
. Although various ignition materials are used as the ignition material 50, the preferred material is
It is a powder mixture of 25% urine and 75% calcium nitrate. This mixture is:
Suitable for igniting solid fuel gas generating material 56 in the described combustion chamber 26
It is known to burn with a very hot flame. A squib 44 ignites the ignition material directly to provide increased reliability of the ignition
Is desirable. It has a plurality of holes 58 for directing ignition gas to the combustion chamber 26
An ignition tube 36 is thus press-fitted into the mounting post 34, rather than a structural element.
Therefore, before being pressed into the mounting column 34, the ignition material in the ignition chamber 40 is completely held.
To be easily wrapped in a layer of aluminum foil 52. The foil 52 is further broken and burned
Enables an instantaneous pressure rise in the ignition chamber 40 of about 1/1000 second before igniting the chamber
Provided for. With the ignition tube wrapped in this way, the ignition material 50
It need not be contained within a chamber isolation container or ignition cap, but instead
In accordance with a preferred embodiment, a squib and a squib that the squib must first ignite
Included in the ignition chamber 40 immediately adjacent to the squib 44 without any membrane between the charges
It is. Thus, the ignition material 50 must ignite the ignition material through the membrane.
Lack of direct contact with the squib 44 to reduce the chance of ignition failure
You. [0014] The ignition chamber of the Adams et al. Patent includes a third or inner cylinder friction welded to a mounting surface.
Is defined by the underlayer. In order for such a cylinder to withstand the welding process, it has a thickness of especially 0.15 inch (3.81 mm) and directs the ignition gas to the combustion chamber.
To maintain a perfect structure of the cylinder.
This thickness of the material adds to the overall weight of the expansion device. To maintain a minimum overall weight of the inflator 10 in accordance with the present invention, the squib 36
, Preferably less than 0.07 inch (1.78 mm), more preferably burst
0.03 inches (0.73 inches), which is sufficient to prevent
6), having a thickness shown at 54 that is less than 0.05 inches (1.27 mm).
I do. For example, to avoid adding unnecessary weight to the inflator 10
Tube 36 has a thickness 54 of about 0.029 inches (0.74 mm). However
, Having a thickness 54 sufficient to be pressed into the mounting post 34 and preventing its rupture.
It should not be thinner than about 0.022 inches (0.56 mm) to prevent
I'm sorry. [0016] Any one of a number of mixtures that meet the requirements of burning rate, non-toxicity, flame temperature
A uniformly distributed granulate 56 of a gas generating mixture is contained within the combustion chamber 26.
You. One mixture utilized is Fred E.C. Schenita (Fred ES)
chneiter) and George F. Kirkoff (George F. Kircho)
ff) in U.S. Pat. No. 4,203,787. Advantageously used
Other mixtures are Graham C.I. United States by Graham C. Shaw
It is described in Japanese Patent No. 4369079. These are assigned to the assignee of the present invention.
Both patents are hereby incorporated by reference. In addition, gas generating materials
It can be in any other suitable shape different from granules such as wafers. The ignition gas of the ignition material 50 is used to ignite the gas generator 56 in the combustion chamber 26.
A plurality of holes 58 are provided in the ignition tube 36 to guide the ignition chamber 40 to the combustion chamber 26.
Have been. In accordance with aspects of the present invention, good ignition of the gas generating material 56 in the combustion chamber is achieved.
In order to provide a better mode of gas flow to the combustion chamber 26 for
A number of small diameter holes 58 of about 96, such as aligned holes, are allowed in the squib if the squib is a component of the housing as in Adams et al.
Instead of a smaller number of holes, they are provided in the ignition tube. The ignition tube 36 with a hole
Since there are no touching components, the number of holes 58 makes the ignition tube very weak for welding.
Regardless, it is increased to an ignition tube as described above. It is necessary for the ignition device 44 that the expansion device 10 of the present invention ignites the film containing the ignition material.
Because the ignition material is in direct contact with the squib,
Or multiple around the perimeter of the squib for better and faster reaction of the ignition material 50
About three holes 60 are provided. The plurality of holes 62 are used to allow gas generated in the combustion chamber 26 to pass through to the diffusion chamber 32.
It is provided around the cylinder 22. For hermetic sealing against moisture in the combustion chamber 26
In addition, there is an aluminum foil 64 or other suitable material on the inner surface of the inner cylinder 22
Provided over hole 62. A generally cylindrical cooling and filtering partition 66 is
Positioned in the combustion chamber adjacent to the foil 64 and before the combustion gas enters the diffusion chamber 32
The hole 62 is covered for cooling and filtering the combustion gas of No. 6. Partition 66
Consisting of three sheaths of 18 mesh stainless steel partition or other suitable material
You. In the aluminum member, the holding disk 68 contacts the partition 66 and
Store gas generating material 56 in the combustion chamber to prevent spilling of gas generating material during operation.
After the gas generant has been inserted for holding, it is pressed into the combustion chamber 26. A baffle or deflection ring 70 of aluminum or other suitable material is used to
As the gas passes through the hole 58, a fuel coaxial with the inner cylinder 22 to deflect the ignition gas.
Arbitrarily located in the firing chamber 26, thereby preventing the flaming action of the ignition gas on the partition 66.
You. In addition, the baffle 70 allows the ignition gas to flow in the combustion chamber 26 in the radial direction.
The entire gas generating material to be deflected axially from
It is ignited well and burns in a short time. The deflector is positioned and tensioned by spot welding
A plurality of approximately three stop members 72 are held by force to the deflecting plate 70 and the partition 66. So
It is possible to sufficiently distribute the baffle 70 and the granules 56 over the entire area of the bottom of the combustion chamber.
, A space is provided from the bottom of the combustion chamber 26. To pass generated gas from the diffusion chamber 32 to an air bag (not shown)
A plurality of holes or outlets 74 spaced around the circumference of the outer cylinder
It is included in the side cylinder 28. The upper or second component 16 absorbs heat from the hot gas generated and
2 to deflect the evolved gas downward into the second component.
Deflection ring 7 extending in front of bore 62 but spaced from inner cylinder 22
6 so that the gas directly impinges on the partitions and filter packs described below.
Instead of passing through a divider and filter pack for better filtration
Follow the more complex passage of hole 74 for a non-straight passage. Overall cylindrical shape
A deflection ring 76 coaxial with the inner cylinder 22 defines the inner mounting surface 24
An inwardly bent end pressed into the inwardly projecting portion of the upper element 16 that forms
Having a part. First, a deflection ring 76 and one 8-mesh aluminum sheath
West German pneumatics with 78 and 40 mesh stainless steel spare partitions
System sold by Newmat Krebsog
One cover 80 of Sikafil filter material and a suitable sera
One cover of Mick paper and finally two of 30 mesh stainless steel partitions
A partition and a filter pack comprising a cover 84 and the deflection ring 76 are
It is located between the side cylinders 28. Partitions and filter packs are
For gas cooling and filtration so that clean gas is supplied to the gas bag.
It is. Any other suitable filter pack is alternatively provided. Filter
The special configuration for the cut 66 and the divider and filter pack depends on the properties of the inflator 10.
Performance requirements: bag inflation time, gas analysis, and particle retention requirements.
You. To compensate for having no third cylinder to provide strength to define the ignition chamber
In order to ensure proper strength near the center of the inflator 10 for
And 16 is provided with an increased thickness near its center. For example, upper or
The thickness of the dissipating element is about 0.25 inches (6.35 mm) at its center. Circumferential grooves 86 allow the upper element 16, ignition tube 36 and cap member 38 to engage during the friction welding process.
It is provided on the inner surface of the upper element 16 to ensure a suitable gap between them. Groove 8
Outside of 6, the upper element 16 has been increased by about 0.325 inches (8.26 mm)
Having a thickness of about 0.225 inches (5.72 mm) at the periphery of the combustion chamber 26
The thickness gradually decreases. These thicknesses in the area of the notch 88 described below
Is reduced by the depth of the notch to maintain strength and reduce weight on the one hand
You. A portion of the lower component 14, which forms the lower wall of the combustion chamber 26, is about 0.25 inches.
With an increased thickness of 6.35 mm (6.35 mm). The inner cylinder 22 is approximately
It has a thickness of 175 inches (4.46 mm). The outer cylinder 28 is about 0.1
It has a thickness of 05 inches (2.67 mm). Provided for fixing the upper element 16 to a friction welding device for rotating the upper element
And reduce the added weight due to the increased thickness of the upper component 16
For this purpose, a plurality of approximately eight weight reduction notches or notches 88 are provided on the upper
It is provided entirely on the outer surface of the element 16. About 0.125 inch (3.18 mm) depth
These notches 88 having a thickness given by the increased thickness of the upper element 16
To form ribs 90 between the notches to maintain increased strength.
It is divided into surroundings and placed with a gap. These cutouts 88 are fitted with an inflation device.
The installation of the friction welding tool for rotating the upper element 16 clockwise as seen in FIG.
A straight leading edge 92 is provided. To further reduce the weight of the inflator, a notch or notch 94 is provided in the lower configuration
A plurality of approximately eight notches or depressions 96 are provided in the center of the outer surface of the element 14 for burning.
Along the bottom of the chamber 26 is provided an inner surface of the lower component 14 and
Ribs are formed between the depressions to maintain the strength of the
These cutouts 96 and their corresponding ribs are arranged so that the cutouts 96
It has the same dimensions as the cutout 88 and the rib 90 of the upper element 16 except that it is square
. In addition to being able to reduce the total weight, the notch 96 is seen on the left side of FIG.
As can be seen, it provides additional volume for the gas generating granules 56, thereby reducing the overall weight of the inflator. [0024] Rice by Adams et al., Assigned to the assignee of the present invention and incorporated herein by reference,
An automatic igniter 98, similar to the one disclosed in U.S. Pat.
It is located in one of the notches 96, as shown on the right side of the figure. Adams and others
As described more fully in the article, the purpose of an auto-ignition device is to
In the event of a fire, the igniter or granules 56 and 56
Ignition material 50, but its own ignition temperature depends on the expansion device.
The storage part of the storage part is damaged or ruptured due to the deterioration of the aluminum constituting the storage part.
Ambient temperature, the expansion device is normally exposed to prevent ignition of the
Substantially higher than the temperature range. The automatic ignition device 98 has a shape that fits the notch 96.
A suitable enclosure surrounded by a suitable pouch covered by a suitable foil 102, such as aluminum foil
It comprises a suitable ignition material 100, such as an explosive. Alternatively, the ignition material 100 is turned off
It is put in the notch 96 and aluminum foil tape covers it. Automatic ignition device 98
, Being provided in one of the notches 96 adjacent to the gas generating material 56,
However, when the auto-ignition device is placed adjacent to the ignition material 50,
An automatic igniter 9 for the gas generating granules 56 for low or slow ignition of the gas generating granules.
8 ignition possible. A plurality of about eight weight reduction notches 104 are provided on an outer surface of the lower component 14,
Surround the periphery of the lower component to secure the lower component to the friction welding device
Placed. The base or lower component 14 provides for the incorporation of the inflator 10 into a vehicle whose owner is to be protected.
A plurality of spaced holes 10 surrounding the lower component for attachment.
8 having a connection mounting flange 106. The mounting flange 106 is mounted
Any suitable shape depending on the requirements of the application. The overall diameter of the upper component may be greater than the expansion shown in the aforementioned Adams et al. Patent.
Characteristically approximately 4.09 inches (103.9 mm) approximately equal to the diameter of the device. However, for substantially the same amount of igniter and the same performance, characteristically about 1
. The total height of the inflator 10, which is 375 inches (34.9 mm), is similar to that of Adams et al.
It is about 0.2 inches (5.08 mm) less than the overall height of the inflator disclosed herein. In addition
Thus, the weight of the inflator 10 of the present invention can be substantially reduced by the weight of Adams et al.
Compared to the characteristic 585 gram weight of an inflator as disclosed in that patent,
It is 513 grams. Thus, the inflation device 10 according to the present invention has a weight and
The volume is advantageously reduced. The expansion device 10 is friction welded in a completely packed state. The fuse 44
The hole is inserted into the hole 42 and is fixed on the knob 34 or the portion forming the hole 42.
Properly fixed. The aluminum foil 52 is fixed to the outer surface of the ignition tube 36,
The tube is pressed into the mounting post 34. Next, the ignition tube 36 comes into direct contact with the ignition device 44.
Filled with the igniting material 50 to be deposited, the cap member 38 is
In order to prevent this from happening, it is press-fitted into the ignition tube 36. The aluminum foil 64
Attached to the inner cylinder 22 along the inner surface of the inner cylinder
The dynamic ignition device 98 is located in one of the notches 96. The baffle 70 is a baffle
It is pulled and fixed to the partition 66 by spot welding of the stop member 72 to the partition 70 and the partition 66.
The divider 66 and the baffle 70 are then moved together with the divider adjacent to the foil 64 to the combustion chamber.
26 and fixed to the inner cylinder 22. Next, gas generating granules 5
6 is placed in the combustion chamber 26 and the retaining disc 68 is then moved to the granulation 56 during the next assembly operation.
To prevent spillage, press into the inner cylinder 22 against the partition 66.
It is. The deflection ring comprises an upper element between the inner mounting surface 24 and the outer cylinder 28.
16 is press-fitted. The dividers and filter packs 78, 80, 82, 84
It is positioned on the upper component 16 between the orientation ring 76 and the outer cylinder 28.
During the friction welding operation, the base element 14 is secured to the friction welding device by a notch 104.
It is. The upper or dissipating element 16 is held in the friction welding device by a notch 88,
It is rotated on the base element 14 to a characteristic speed of about 3000 rpm. Such speed
Degrees, the clutch is actuated to disconnect the power source and the free upper element 16
Is lowered to bring inner mounting surface 24 into contact with inner cylinder 22 and outer cylinder 28 into contact with outer mounting surface 30. This results in friction
The rotation of the upper element 16 is momentarily stopped, but the gold of each lower and upper element 14 and 16 is
Raise the temperature of the contact portion sufficient to cause bonding at the genus contact portion. Pressure
The force is held for a short period of time to strengthen the welds 18 and 20, for example, one or two seconds.
It is. The function of the inflation device 10 is to provide an impact sensor (see FIG.
(Not shown). The ignition device 44 ignites the ignition material 50.
The ignition chamber 40 is ignited. The ignition material 50 burns and the resulting hot gas
After passing through the hole 58 of the ignition tube 36 and a short delay of about 1/1000 second, the aluminum foil 5
2 to enter the combustion chamber 26 to ignite the gas generating material 56 in the combustion chamber.
. The expansion device gas generated by the ignition of the gas generator 56 is first cooled and
Passed through the partition 66 of the combustion chamber, and then break through the aluminum foil 64 to form the emission chamber 32
Pass through the hole 62. The gas in the inflator is cooled and lowered by a deflection ring 76.
Direction, and then filter packs 78, 80,
82, 84, and then a gas bag (FIG.
(Not shown) through hole 74 and out of inflator 10. A third shell mounted in the inner cylinder 22 and to each of the first and second components
The omission of the cylinder further allows the omission of the ignition tube 36 and the ignition material 50,
Whereby the gas generant 56 is positioned directly tightly surrounding the ignition device,
That is, there is no film or partition between the squib and the gas generating material.
As shown in (1), the gas generator 56 is directly ignited. This further reduces the weight of the inflator.
It allows for reduced volume and size and a simple inflator construction. Shown in FIG.
As described above, the squib 110 similar to the squib 44 has substantially the same height and height.
It has a larger diameter of about 0.5 inches (12.7 mm) and also contains boron and nitric acid as described above.
Larger yields containing about 0.5 grams of a suitable ignition material, such as a mixture of calcium
A storage section 122 is provided. The storage section 122 is a more uniform point of the gas generator 56.
For fire, it has a hole 112 which is increased by about 10 and the gas generant is in direct contact with this hole. The squib 110 contacts the gas generant 56 and projects into the combustion chamber 26.
To extend through the central hole 114 of the lower component 14
The center hole is formed by a stop 116 on the lower component 14 which overlaps and engages the profile.
114. The squib 110 has a stop 118 on the lower component 14.
Is connected to the electric pressurizing wire 46 by the connector 120 held at a predetermined position.
Is done. Thus, in the expansion device according to the embodiment of FIG.
0 is the gas generating granule 5 in order to omit the ignition tube 36 and the ignition material 50 in FIG.
6 is ignited directly through hole 112. The present invention is not limited to the particular embodiments illustrated or described herein, but
The present invention as defined by the appended claims, with modifications of the various embodiments
It is understood that it is actually performed within the range of As described above, according to the inflating device for a vehicle inflatable impact protection bag according to the present invention,
, In the second chamber where the gas generating material is disposed, radially from the first chamber to the second chamber.
The flowing ignition gas is deflected in the axial direction by the deflecting means.
Shows a good emission state without blowing through in the second chamber,
Fast inflation of the airbags due to good ignition and burning in a short time
become.

[Brief description of the drawings]     FIG.   FIG. 4 is a plan view of an embodiment of the improved inflation device of the present invention.     FIG. 2   It is a front view of FIG.     FIG. 3   FIG. 3 is a cross-sectional view taken along line 3-3 of FIG.     FIG. 4   FIG. 9 is a front view of another embodiment of the ignition device of the expansion device.     [Explanation of symbols] 14 First component 16 Second component 18, 20 ... welded part 22 ... Inner cylinder 24, 30… Mounting surface 26 ... Combustion chamber 28 ... Outer cylinder 32 ... emission room 34… Mounting column 36 ... tubular member 38 ... Cap member 44,110… Fire device 50 ... Ignition material 52 ... Aluminum foil 54 ... thickness 56: Granules 58 ... hole 60,112 ... hole 62 ... hole 74 ... Exit hole 76 ... deflection ring 78, 80, 82, 84 ... 88… Notch 90 ... rib 96 ... hollow 98… Automatic ignition device 100… Auto ignition material 102 ... Foil

Claims (1)

Claims 1. A first chamber, a second chamber, and a third chamber, which are disposed substantially concentrically adjacent to each other in a housing , and are disposed in the first chamber located at the innermost side. Ignition material,
A gas generating material disposed in a second chamber adjacent to the outside of the first chamber, and a filter disposed in the third chamber adjacent to the outside of the second chamber; An ignition gas generated by igniting an ignition material flows into the second chamber, and an inflation gas generated by igniting the gas generating material in the second chamber with the ignition gas flows into the third chamber. And an inflation device for a vehicle inflatable shock protection bag for allowing the inflation gas to flow out through a filter in the third chamber to the outside, wherein the ignition gas flowing radially from the first chamber into the second chamber is provided. Deflecting means for deflecting in an axial direction, wherein the housing has an integral cylindrical outer cylinder as an outer wall;
Inside the cylinder, a cylindrical inner cylinder and a tubular member are attached to the outer cylinder.
And the inner cylinder and the tubular member,
The space inside the outer cylinder is the first chamber, the second chamber, and the third chamber.
Wherein the inner cylinder is integral with the housing and
The tubular member is separate from the housing and the thickness of the tubular member is
An inflatable device for an inflatable impact protection bag for a vehicle, wherein the inflatable device is thinner than the thickness of the vehicle.