JP3962202B2 - Airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag apparatus, and more particularly to an airbag apparatus to which a substantially cylindrical inflator for supplying inflation gas is attached and fixed in an airbag.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as an airbag device for fixing a substantially cylindrical inflator for inflating and deploying an airbag using a ring member, a device described in JP-T-4-504091 is known.
This includes a ring member having a ring portion and a bolt portion extending from the ring portion, and a casing holder for housing the inflator. The ring portion is fitted into the inflator, and the bolt portion is inserted into the hole of the casing holder. Is inserted into the airbag, and is attached to the fixed part via a nut.
[0003]
Further, as this type of airbag device, the one described in JP-A-9-123866 is also known.
In this structure, an elastic body is disposed on the inner peripheral surface of the ring portion so that the ring portion can be plastically deformed. After the ring portion is fitted to the inflator, the ring portion is plastically deformed to hold the inflator, and the air is removed. The structure is inserted into the bag, and the bolt portion of the ring member is tightened with a nut and attached to the fixed portion.
[0004]
[Problems to be solved by the invention]
According to the one described in the above Japanese National Publication No. 4-504091, since the inflator is not stable until the inflator fitted with the ring member is housed in the casing holder and fixed to the fixing part with the nut. There is a risk that the ring member may come off or be displaced.
In order to prevent this, a cover is provided on the ring member or a grooved insert is attached. However, there are problems that the number of parts increases and work efficiency is poor.
[0005]
On the other hand, in the one described in JP-A-9-123866, it is necessary to fit the ring member to the inflator so that the bolt portion is aligned with the position of the mounting hole of the airbag. There is a problem that the position adjustment at the time is difficult.
In addition, it is difficult to dispose an elastic body on the inner peripheral surface of the ring portion.
Furthermore, since the ring portion is plastically deformed and fixed to the inflator, and further fixed to the fixing portion using a nut, the mounting and fixing work must be performed twice, which has the problem of poor work efficiency. Yes.
[0006]
The present invention has been made in view of such problems of the prior art, and the object of the present invention is to easily determine the fitting position on the inflator, and to fix and fix the inflator. It is an object of the present invention to provide an airbag device that can be easily performed.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention comprises a substantially cylindrical inflator for inflating and deploying an airbag,
At least one ring member having a substantially annular ring portion to be fitted to the inflator, and a bolt portion attached in an outward direction of the ring portion;
A casing holder having a bottom plate and a pair of long side plates, housing the inflator from the opening, and providing a through hole through which the bolt portion penetrates the bottom plate;
A nut that is screwed to the bolt portion and attaches and fixes the inflator to a fixed portion;
A notch hole that fits into the ring part is formed at the opposing position of the pair of long side plates, and the width dimension between the long side plates is formed smaller than the outer diameter of the ring part, so that the ring part can be elastically deformed and temporarily fixed . The ring portion is formed and is plastically deformed by fixing the airbag device with the bolt portion .
[0008]
The invention according to claim 2 is characterized in that, in addition to the invention according to claim 1, the width dimension between the long side plates closer to the bottom plate than the notch hole is formed smaller than the outer diameter of the inflator.
The invention according to claim 3 is characterized in that, in addition to the invention according to claim 1 or 2, the width dimension between the long side plates is formed smaller than the outer diameter of the inflator, and the long side plates are also elastically deformed .
[0009]
The inflator used in the present invention is a cylinder type substantially cylindrical shape, and supplies inflation and deployment gas to a folded airbag.
The ring portion of the ring member is fitted on the outer peripheral surface portion of the inflator and has a substantially annular shape. Here, the substantially annular shape only needs to have a certain annular shape so as to be fitted to the inflator, and may have a horseshoe shape, for example.
The ring portion is formed slightly larger than the outer diameter of the inflator. When a plurality of ring members are used, the inflator can be stably fixed.
The casing holder stores an inflator fitted with a ring member, and has a horizontally long box shape. And the top part of a casing holder is made into the opening in order to insert the inflator which fitted the ring part.
When a plurality of through holes are provided in the casing holder, the distance between the through holes is set to be equal to the distance between the inflator mounting holes provided in the airbag.
The notch hole is formed so that the maximum diameter portion of the ring portion is partially inserted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a ring member and a casing holder used in the present invention, FIGS. 2 and 3 are cross-sectional views of the casing holder, FIG. 4 is a cross-sectional view showing a temporarily assembled state of the inflator, and FIG. FIG. 6 is a sectional view showing a fixed state of the inflator, and FIG. 7 is a side view showing the fixed state of the inflator.
[0011]
The inflator 10 used in the present invention is a cylinder type substantially cylindrical shape, and supplies inflation and deployment gas to a folded airbag.
[0012]
Reference numeral 20 denotes a ring member fitted to the inflator 10.
The ring member 20 includes a ring portion 21 that has a substantially annular shape, and a bolt portion 22 that is attached to the ring portion 21 in the outward direction.
Here, the substantially annular shape only needs to have a certain annular shape so as to be fitted to the inflator, and may have a horseshoe shape, for example.
[0013]
The ring portion 21 is fitted on the outer peripheral surface portion of the inflator 10 and is formed slightly larger than the outer diameter of the inflator 10. If the ring portion 21 is formed so as to be elastically deformable, it is convenient to fit into a casing holder 30 described later.
If a plurality of ring members 20 are used, the inflator 10 can be stably fixed.
Reference numeral 23 denotes a nut that is screwed into the bolt portion 22 and attaches and fixes the inflator 10 to a fixing portion (not shown).
[0014]
Reference numeral 30 denotes a casing holder having a horizontally long box shape that houses the inflator 10 fitted with the ring member 20.
The top portion of the casing holder 30 is an opening 31 for inserting the inflator 10 fitted with the ring portion 21.
[0015]
The bottom plate 32 of the casing holder 30 is provided with a through hole 33 through which the bolt portion 22 of the ring member 20 passes.
When a plurality of through holes 33 are provided, the distance between the through holes 33 is set equal to the distance between the inflator mounting holes provided in the airbag (not shown).
[0016]
A side portion of the casing holder 30 includes a pair of a long side plate 34 and a short side plate 35 that face each other.
As shown in FIG. 2, the long side plate 34 may be formed to have a U-shaped cross section with the bottom plate 32. Moreover, as shown in FIG. 3, the step part 36 may be provided and it may be formed so that the width | variety between the long side plates 34 and 34 may spread a little on the top part side.
[0017]
In the embodiment shown in FIG. 3, the width dimension between the long side plates 34 on the top side is formed smaller than the outer diameter of the circular portion of the ring portion 21.
And the long side board 34 is provided in the outer side so that elastic deformation is possible so that the inflator 10 can be inserted. Therefore, the long side plate 34 and the short side plate 35 are in close contact with each other, and the long side plate 34 can be easily elastically deformed. Moreover, as shown in FIG. 1, if the cutting part 37 is provided between the long side plate 34 and the short side plate 35, the wiring to the inflator 10 can be easily passed.
[0018]
Further, in the embodiment shown in FIG. 3, the width dimension between the long side plates 34 on the top side may be formed smaller than the outer diameter of the inflator 10.
In this way, when the inflator 10 is stored in the casing holder 30, the inflator 10 itself is directly sandwiched between the long side plates 34, 34 of the casing holder 30, so that the inflator 10 is fixed more firmly than the ring member 20 alone.
[0019]
Each side plate 34 is provided with a notch 38 that fits into the ring portion 21 of the ring member 20.
The cutout hole 38 is formed so that the maximum diameter portion of the ring portion 21 is partially inserted.
[0020]
Further, the width dimension between the long side plates 34 on the side of the bottom plate 32 from the notch hole 38 may be formed smaller than the outer diameter of the inflator 10.
Thus, when the inflator 10 is fixed, the ring portion 21 is shifted toward the bottom plate 32 of the casing holder 30 by tightening the nut 23, and the width dimension between the long side plates 34 on the bottom plate 32 side from the notch hole 38 is the inflator. Therefore, the inflator 10 drawn to the bottom plate 32 side of the casing holder 30 by the ring portion 21 is fixed in contact with the long side plates 34 and 34 on the bottom plate 32 side via the ring portion 21. . Further, when the long side plates 34, 34 plastically deform the ring portion 21, after tightening the nut 23, as shown in FIG. 6, the ring portion 21 is fitted into the inflator 10 without a gap and is more firmly held. be able to.
[0021]
Next, a method for mounting and fixing the inflator 10 will be described.
First, the ring portion 21 of the ring member 20 is fitted to the outer peripheral surface portion of the inflator 10. Then, the inflator 10 is accommodated in the casing holder 30 and temporarily assembled while the bolt portion 22 of the ring member 20 is passed through the through hole 33 of the casing holder 30.
[0022]
At this time, the width dimension between the long side plates 34, 34 of the casing holder 30 is formed smaller than the outer diameter of the ring portion 21, but when the inflator 10 fitted with the ring portion 21 is pushed in, the long side plates 34, 34 are inserted. Is elastically deformed outward, and the ring portion 21 is fitted into the notch hole 38 and fixed. If the ring portion 21 is formed so as to be elastically deformable, the inflator 10 is firmly fixed by the ring portion 21.
Since the width dimension between the long side plates 34 of the casing holder 30 is formed smaller than the outer diameter of the ring portion 21, the long side plates 34, 34 are moved in the direction in which the inflator 10 comes off via the ring member 20. Suppress movement. Further, since the inflator 10 is accommodated by elastically deforming at least one of the ring portion 21 and the long side plates 34, 34 fitted to the inflator 10, the inflator 10 can be held by these restoring forces.
[0023]
Next, the casing holder 30 to which the inflator 10 is temporarily assembled is inserted into the airbag, the bolt portion 22 protruding from the casing holder 30 is passed through the inflator mounting hole provided in the airbag, and the bolt portion 22 is fixed at the fixed portion. By screwing the nut 23 into the inflator 10, the inflator 10 is attached and fixed to the airbag at a time.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the ring member in the inflator can be obtained by simply passing the bolt part of the ring member through the through hole provided in the casing holder and aligning the ring part with the notch hole. Can be easily determined, and thereafter, the inflator can be stored in the casing holder simply by pushing in the inflator, and the inflator fitted with the ring member can be easily temporarily attached to the casing holder. In addition, the work for fixing the inflator to the airbag can be done by only one work of tightening the nut on the bolt part, and the work efficiency is extremely good.
Further, by using a plurality of ring members, the temporarily assembled state and the fixed state of the inflator can be further stabilized.
Further, even if a force is applied in the direction in which the inflator is detached in the temporarily assembled state, the movement of the ring portion is always suppressed between the long side plates of the casing holder, so that the inflator is difficult to be removed and is easy to carry.
And according to this invention, the number of parts can also be decreased.
[0025]
In the invention according to claim 2, since the width dimension between the long side plates on the bottom plate side from the notch hole is formed smaller than the outer diameter of the inflator, the inflator drawn to the bottom plate side comes into contact with the long side plate after tightening the nut. It is fixed in a state, it can be fixed easily and work efficiency is good. When the ring member is plastically deformed, the ring member is fitted into the inflator without a gap, and the inflator can be held more firmly and is stable.
In the invention according to claim 3, since the width dimension between the long side plates is formed smaller than the outer diameter of the inflator, the inflator itself is sandwiched between the side plates of the casing holder, and the temporarily assembled state of the inflator to the casing holder is more stable. To do.
[Brief description of the drawings]
FIG. 1 is a perspective view of a ring member and a casing holder used in the present invention.
FIG. 2 is a cross-sectional view of a casing holder.
FIG. 3 is a cross-sectional view of another embodiment of a casing holder.
FIG. 4 is a cross-sectional view showing a state where the inflator is temporarily assembled.
FIG. 5 is a cross-sectional view showing a state where the inflator is being fixed.
FIG. 6 is a cross-sectional view showing a fixed state of the inflator.
FIG. 7 is a side view showing a fixed state of the inflator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Inflator 20 Ring member 21 Ring part 22 Bolt part 23 Nut 30 Casing holder 31 Opening 32 Bottom plate 33 Through hole 34 Long side plate 38 Notch hole

Claims (3)

A substantially cylindrical inflator for inflating and deploying an airbag;
At least one ring member having a substantially annular ring portion to be fitted to the inflator, and a bolt portion attached in an outward direction of the ring portion;
A casing holder having a bottom plate and a pair of long side plates, housing the inflator from the opening, and providing a through hole through which the bolt portion penetrates the bottom plate;
A nut that is screwed to the bolt portion and attaches and fixes the inflator to a fixed portion;
A notch hole that fits into the ring part is formed at the opposing position of the pair of long side plates, and the width dimension between the long side plates is formed smaller than the outer diameter of the ring part, so that the ring part can be elastically deformed and temporarily fixed . The airbag device is formed and the ring portion is plastically deformed by fixing the airbag device with the bolt portion .   2. The airbag device according to claim 1, wherein a width dimension between the long side plates on the bottom plate side with respect to the notch hole is formed smaller than an outer diameter of the inflator. The airbag apparatus according to claim 1 or 2 , wherein a width dimension between the long side plates is formed smaller than an outer diameter of the inflator, and the long side plates are also elastically deformed .

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