JP2005225351A - Side airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device capable of effectively controlling deployment and inflation of an airbag. <P>SOLUTION: The side airbag device 24 comprises an inflater 26 for jetting gas from a gas jet port and the airbag 27 that is deployed and inflated between a body side section of a vehicle and an occupant by jetted gas. The airbag 27 has an upper partition chamber 34 and a lower partition chamber 35. The airbag has a front communication passage 36 and a rear communication passage 37 for communicating respective partition chambers 34 and 35, and the jetted gas circulates from the lower partition chamber 35 to the upper partition chamber 34. An inner tube 28 is disposed in the airbag 27. The gas jet port of the inflater 26 is inserted into the inside of the inner tube 28. An upper end opening 38 of the inner tube 28 is disposed in the upper partition chamber 34, and the lower end opening 39 is disposed in the lower partition chamber 35. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a side airbag device that inflates and deploys between a body side portion of a vehicle and a passenger when an impact of a predetermined value or more is applied to the body side portion of the vehicle.

Conventionally, as this type of side airbag apparatus, an apparatus including an inflator that ejects gas from a gas ejection port and an airbag that is inflated and deployed by the ejection gas is known (see Patent Document 1). The airbag described in Patent Document 1 includes an upper compartment, a lower compartment, and a communication passage that communicates each compartment. The airbag is configured to allow gas to flow from the lower compartment to the upper compartment via the communication passage. The gas outlet of the inflator is disposed in the lower compartment, and this side airbag device is configured to eject gas into the lower compartment. And the jetting gas jetted into the lower compartment is configured to be supplied to the upper compartment after flowing through the communication path. That is, the expansion and deployment of the lower compartment is completed prior to the expansion and deployment of the upper compartment, and the lower compartment protects the passenger's waist with priority.
International Publication No. 02/100690 Pamphlet

  However, in the side airbag device described in Patent Document 1, unless the lower compartment is sufficiently inflated and deployed, the supply of jet gas from the communication path to the upper compartment is not sufficiently performed. That is, the supply of the ejected gas to the upper compartment depends on the communication path. Therefore, there is a problem that it is difficult to effectively control the expansion and expansion of the upper compartment, such as the possibility that it will take time to complete the expansion and expansion of the upper compartment.

  The present invention has been made paying attention to the problems existing in the prior art as described above. The object is to provide a side airbag device capable of effectively controlling the inflation and deployment of the airbag.

  In order to achieve the above object, an invention described in claim 1 includes an inflator that ejects gas from a gas ejection port, and an airbag that is inflated and deployed between the body side portion of the vehicle and the passenger by the ejection gas. The airbag is provided with an upper compartment, a lower compartment, and a communication passage that communicates with each of the compartments, and is connected to the lower compartment via the communication passage. The ejected gas is configured to be able to flow in the upper compartment, and further, an inner tube is provided in the airbag, a gas ejection port is inserted into the inner tube, and an upper end opening of the inner tube is The gist is that the lower end opening of the inner tube is disposed in the lower compartment while being disposed in the upper compartment.

  According to this configuration, in addition to the jet gas supplied from the lower compartment through the communication path, the jet gas is also supplied from the upper end opening of the inner tube. That is, the supply of the jet gas to the upper compartment is also performed from the upper end opening of the inner tube without depending on only the communication path. As a result, the delay of expansion and deployment in the upper compartment is suppressed.

  According to a second aspect of the present invention, in the first aspect of the present invention, the supply amount of the jet gas supplied from the upper end opening of the inner tube to the upper compartment is changed from the lower end opening of the inner tube. The gist of the present invention is to make the configuration so as to be smaller than the supply amount of the jet gas supplied to the lower compartment.

According to this structure, expansion | swelling expansion | deployment of a lower compartment is facilitated easily, suppressing the delay of expansion | swelling expansion | deployment in an upper compartment.
The gist of the invention according to claim 3 is that, in the invention according to claim 1 or 2, the opening area of the upper end opening is narrower than the opening area of the lower end opening.

  According to this configuration, due to the shape of the upper end opening and the lower end opening of the inner tube, the supply amount of the ejection gas supplied to the upper compartment is easier than the supply amount of the ejection gas supplied to the lower compartment. It can certainly be reduced.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the inflator is a cylinder type in which a connector portion is provided at an upper end and the gas outlet is provided at a lower end. The inflator is inserted into the inner tube, the connector portion is disposed on the upper end opening side of the inner tube, and the gas outlet is disposed on the lower end opening side of the inner tube. This is the gist.

  According to this configuration, the downwardly ejected gas reaches the lower end opening directly through the inner tube. Moreover, the jet gas which goes upward reaches | attains an upper end opening part through the clearance gap between the outer peripheral surface of an inflator, and the inner peripheral surface of an inner tube. That is, in the inner tube, since the main part of the inflator is interposed between the gas outlet and the upper end opening, the flow rate of the ejected gas reaching the upper end opening rather than the flow rate of the ejecting gas reaching the lower end opening. Can be reduced.

  The invention according to claim 5 is the invention according to claim 4, further comprising a retainer for fixing the inflator to a mounting portion in a vehicle compartment, wherein the inflator and the inner tube are inserted into the retainer. It is a summary.

According to this structure, an inner tube can be easily fixed to an inflator using a retainer.
The invention according to claim 6 is the cylinder type of the invention according to any one of claims 1 to 3, wherein the inflator is a cylinder type in which a connector portion is provided at an upper end and a gas outlet is provided at a lower end. The gist of the inflator is that a fixing piece for fixing the inner tube to the inflator is provided at an upper end opening of the inner tube.

According to this configuration, the inner tube can be fixed to the inflator using the fixing piece.
According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects of the present invention, in the gap between the outer surface of the inflator and the inner surface of the lower end portion of the inner tube, The gist is that a flow rate adjusting member for adjusting the flow rate is provided.

  According to this configuration, the supply amount of the ejection gas supplied to the upper compartment can be easily adjusted.

  According to the present invention, the inflation and deployment of the airbag can be effectively controlled.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a left front seat 21 disposed in the vehicle interior. The front seat 21 includes a seat portion 22 and a backrest portion 23, and a side airbag device 24 is embedded in a left side portion of the backrest portion 23 in a state where the side airbag device 24 is accommodated in a case 25 as a mounting portion in the vehicle interior. . The side airbag device 24 is provided corresponding to a left door equipped on a body side portion of a vehicle (not shown). Although only the left front seat 21 is shown in the drawing, a similar side airbag device 24 is also provided on the right front seat (not shown). In the side airbag device 24 of the present embodiment, the vehicle front-rear direction is referred to as front-rear and the vehicle vertical direction is referred to as up-down with reference to FIG.

  As shown in FIGS. 2 and 4, the side airbag device 24 includes a cylindrical inflator 26 that ejects gas, a bag-like airbag 27 that is inflated and deployed by the ejected gas, and a tubular inner that circulates the ejected gas. Tube 28. Further, the side airbag device 24 includes a tubular (polygonal tubular) retainer 29, and the retainer 29 fixes the inner tube 28 to the inflator 26, and the inflator 26 and the airbag 27 are attached to the case 25. It is supposed to be fixed. These inflator 26, inner tube 28 and retainer 29 are accommodated in an airbag 27.

  The inflator 26 is a cylinder-type inflator 26, and a connector part 30 is provided at the upper end and a gas ejection part 31 is provided at the lower end. The inflator 26 is provided along the rear edge of the inner chamber of the airbag 27 with the connector portion 30 facing upward and the gas ejection portion 31 facing downward. A gas generating agent (not shown) is accommodated in the inflator 26. As shown in FIG. 4, a plurality of gas ejection ports 31 a are formed in the gas ejection portion 31 of the inflator 26, and gas generated from the gas generating agent is ejected from the gas ejection ports 31 a to the outside of the inflator 26. It is like that. The inflator 26 is connected to an impact sensor (not shown) for detecting an impact on the body side portion of the vehicle. An impact sensor is electrically connected to the inflator 26 via a control circuit (not shown) by connecting a connector of a harness (not shown) to the connector portion 30.

  As shown in FIGS. 1 and 2, the airbag 27 is inflated and deployed by supplying a jet gas from the inflator 26 when an impact of a predetermined value or more is applied to the body side portion of the vehicle. The airbag 27 has an elliptical shape extending in the vertical direction, and is configured to cover one side of the waist from the shoulder portion of the passenger P seated on the front seat 21. The airbag 27 is formed so as to form a bag shape as a whole by overlapping a pair of front and back base fabrics 32a and 32b made of woven fabric and sewing them along their peripheral edges. The airbag 27 is accommodated in the case 25 in a folded state in which the airbag 27 is folded into a predetermined shape. The airbag 27 shown in FIGS. 1 and 2 schematically shows the airbag 27 at the time of expansion and deployment in which the gas is filled in the entire airbag 27 while the airbag 27 at the time of deployment is not filled with gas. Is shown.

  A tether 33 as a connecting portion is provided so as to extend in the front-rear direction slightly below the center of the airbag 27, and the inner chamber of the airbag 27 is divided into an upper compartment 34 and a lower compartment 35 by the tether 33. It is partitioned. The tether 33 is formed of a horizontally long rectangular woven fabric made of the same material as the base fabrics 32a and 32b constituting the airbag 27. Both side edges in the longitudinal direction of the tether 33 are sewn to the base cloth 32a and the base cloth 32b, respectively, so that the tether 33 is installed between the base cloth 32a and the base cloth 32b. The tether 33 regulates the thickness of the airbag 27 at the time of inflation and deployment to a predetermined thickness. Therefore, the airbag 27 is inflated and deployed in a stable state.

  The length in the longitudinal direction (front-rear direction) of the tether 33 is shorter than the length in the front-rear direction in the inner chamber of the airbag 27, so that the tether 33 in the inner chamber of the airbag 27 has a front and rear length respectively. A front communication path 36 and a rear communication path 37 are formed as communication paths. The front communication passage 36 and the rear communication passage 37 are configured to allow the jet gas to flow from the lower compartment 35 to the upper compartment 34.

  The inner tube 28 shown in FIGS. 1 and 2 is formed of the same material as the base fabrics 32 a and 32 b constituting the airbag 27 and can be folded together with the airbag 27. The inner tube 28 is formed in a substantially cylindrical shape by sewing the opposing side edges of a long rectangular woven fabric. The inner tube 28 at the time of deployment and expansion / deployment is arranged in a shape bent along the rear end edge in the inner chamber of the airbag 27. An upper end opening 38 and a lower end opening 39 are opened at the upper and lower ends of the inner tube 28, respectively. As shown in FIG. 2, the upper end opening 38 is disposed in the upper compartment 34, and the lower end opening 39 is disposed in the lower compartment 35. The upper end opening 38 has a smaller diameter than the lower end opening 39, so that the upper end opening 38 has a smaller opening area than the lower end opening 39.

  As shown in FIGS. 2 and 3, the inflator 26 is inserted into the inner tube 28, and the inner tube 28 into which the inflator 26 is further inserted is inserted into a metal retainer 29. Then, the inner tube 28 is fixed to the inflator 26 and the inner tube 28 and the inflator 26 are fixed to the retainer 29 by caulking the retainer 29 so as to reduce the diameter. The inflator 26, the inner tube 28, and the retainer 29 are provided at the rear end portion in the inner chamber of the airbag 27 so as to extend in the vertical direction.

  A pair of bolts 41 projecting rearward from the upper end side and the lower end side of the retainer 29 are provided as mounting members. As shown in FIG. 4, these bolts 41 are inserted through an attachment hole 42 formed in the rear end edge of the airbag 27 and a fixing hole 43 formed in the case 25 in this order. The retainer 29 and the airbag 27 are fixed to the case 25 by screwing a nut 44 as an attachment member to these bolts 41. At this time, the upper end of the inflator 26 is disposed above the tether 33 and the lower end of the inflator 26 is disposed below the tether 33.

  As shown in FIG. 4, the gas ejection port 31 a of the inflator 26 is inserted into the inner tube 28, and the ejection gas is ejected from the gas ejection port 31 a into the inner tube 28. The gas ejection portion 31 of the inflator 26 is disposed on the lower end opening 39 side of the inner tube 28 and the connector portion 30 is disposed on the upper end opening 38 side. As shown by the arrows in FIG. 4, the jet gas in the inner tube 28 can flow below the inner tube 28. Further, the jet gas in the inner tube 28 can flow above the inner tube 28 through a gap between the outer peripheral surface of the inflator 26 and the inner peripheral surface of the inner tube 28 so as to avoid the caulking portion 40.

  To install the side airbag device 24, first, the inflator 26 is inserted into the inner tube 28 and the inner tube 28 is inserted into the retainer 29 as shown in FIG. Next, the inner tube 28 is fixed to the inflator 26 and the inner tube 28 and the inflator 26 are fixed to the retainer 29 by caulking the caulking portion 40 of the retainer 29. Subsequently, the retainer 29 to which the inner tube 28 and the inflator 26 are fixed is inserted into the inner chamber of the airbag 27. Next, the retainer 29 and the airbag 27 are fixed to the case 25 by inserting the bolts 41 in the order of the mounting holes 42 and the fixing holes 43 and screwing the nuts 44.

Next, the operation of the side airbag device 24 will be described.
When another vehicle collides with the body side portion of the vehicle and an impact of a predetermined value or more is applied to the body side portion, a drive current is output from the control circuit to the inflator 26 based on a detection signal from the impact sensor. And the gas based on this drive current generate | occur | produces from the gas generating agent of the inflator 26, and the gas is ejected from the gas ejection port 31a. At this time, as shown in FIG. 4, the gas ejection port 31 a is inserted into the inner tube 28, so that the ejection gas is supplied into the inner tube 28. Subsequently, the jet gas supplied to the inner tube 28 flows upward and downward in the inner tube 28 as indicated by arrows in FIG. The downwardly ejected gas reaches the lower end opening 39 directly through the inner tube 28. On the other hand, the jet gas flowing upward reaches the upper end opening 38 through the gap between the outer peripheral surface of the inflator 26 and the inner peripheral surface of the inner tube 28. At this time, the upper end opening 38 of the inner tube 28 is disposed in the upper compartment 34 and the lower end opening 39 is disposed in the lower compartment 35. Accordingly, the upper compartment 34 is supplied with an ejected gas from the upper opening 38 in addition to being supplied with the ejected gas from the lower compartment 35 via the front communication passage 36 and the rear communication passage 37. In other words, the supply of the ejected gas to the upper compartment 34 is performed from the upper end opening 38 of the inner tube 28 without depending only on the front communication passage 36 and the rear communication passage 37, and as a result, the upper compartment Delay of expansion and deployment in the chamber 34 is suppressed.

The effects exhibited by the first embodiment are described below.
(1) In the side airbag device 24, the airbag 27 is provided with a front communication passage 36 and a rear communication passage 37 that communicate the upper compartment 34 and the lower compartment 35. The inner tube 28 has a gas outlet 31 a inserted therein, the upper end opening 38 is disposed in the upper compartment 34, and the lower end opening 39 is disposed in the lower compartment 35. When configured in this manner, the upper compartment 34 is not supplied with the ejected gas from the lower compartment 35 via the front communication passage 36 or the rear communication passage 37, but also has an ejection gas from the upper end opening 38. Supplied. In other words, the supply of the ejected gas to the upper compartment 34 is performed from the upper end opening 38 of the inner tube 28 without depending only on the front communication passage 36 and the rear communication passage 37, and as a result, the upper compartment Delay of expansion and deployment in the chamber 34 is suppressed. Therefore, the expansion and deployment of the upper compartment 34 can be effectively controlled.

  (2) In the side airbag device 24, the inflator 26 is a cylinder type inflator 26, and the inflator 26 is inserted into the inner tube 28. Further, the gas ejection portion 31 of the inflator 26 is disposed on the lower end opening 39 side. When configured in this way, the downwardly ejected gas reaches the lower end opening 39 directly through the inner tube 28. Further, the jet gas directed upward reaches the upper end opening 38 through the gap between the outer peripheral surface of the inflator 26 and the inner peripheral surface of the inner tube 28. That is, in the inner tube 28, the main body portion of the inflator 26 is interposed between the gas ejection portion 31 and the upper end opening 38, so that the flow rate of the ejected gas reaching the lower end opening 39 is higher than the upper end opening 38. The flow rate of the jet gas that reaches is reduced. As described above, by using the main body portion of the inflator 26, it is possible to easily reduce the supply amount of the jet gas supplied to the upper compartment 34 rather than the supply amount of the jet gas supplied to the lower compartment 35. it can. Therefore, the inflation and deployment of the lower compartment 35 is easily promoted while suppressing the delay of the inflation and deployment in the upper compartment 34, so that the inflation and deployment of the airbag 27 can be controlled more effectively.

  (3) In the side airbag device 24, the opening area of the upper end opening 38 is formed to be narrower than the opening area of the lower end opening 39. When configured in this way, due to the shape of the upper end opening 38 and the lower end opening 39 of the inner tube 28, the jet gas supplied to the upper compartment 34 rather than the supply amount of jet gas supplied to the lower compartment 35. Can be easily and reliably reduced. Therefore, the stability in the operation of the airbag 27 can be enhanced.

  (4) In the side airbag device 24, the inflator 26 and the inner tube 28 are inserted into the retainer 29. In such a configuration, the inner tube 28 can be fixed to the inflator 26 by caulking the retainer 29. Therefore, the inner tube 28 can be easily mounted using the retainer 29.

  (5) In the side airbag device 24, the inner tube 28 is composed of a foldable base fabric (woven fabric). Therefore, it can be folded together with the airbag 27 and can be easily accommodated in the case 25.

(6) In the side airbag device 24, a front communication path 36 is provided on the vehicle front end side of the airbag 27 during inflation and deployment, and a rear communication path 37 is provided on the vehicle rear end side. . When configured in this manner, even if either one of the front communication passage 36 and the rear communication passage 37 is blocked by, for example, an entry from the outside of the vehicle, the jet gas flows from the lower compartment 35 to the upper compartment 34. It is possible. Therefore, it is possible to more effectively suppress the expansion and deployment of the upper compartment 34 from being delayed.
(Modification)
It should be noted that the first embodiment may be modified and embodied as follows.

The opening area of the upper end opening 38 may be the same as the opening area of the lower end opening or wider than the opening area of the lower end opening.
In place of the tether 33, a seam joined by sewing the base cloth 32a and the base cloth 32b without a gap may be employed. Moreover, you may comprise combining the tether 33 and a seam as a junction part which joins the base fabric 32a and the base fabric 32b.

In the embodiment, the front communication path 36 and the rear communication path 37 are employed as the communication path, but either the front communication path 36 or the rear communication path 37 may be omitted.
The inner tube 28 is made of the same material as the base fabrics 32a and 32b constituting the airbag 27. What is the base fabric constituting the airbag 27, such as a woven fabric coated with silicone resin? Different base fabrics may be employed.

The bolt 41 may be provided directly on the inflator 26 without providing the retainer 29.
(Second Embodiment)
The second embodiment of the present invention will be described with a focus on differences from the first embodiment.

  As shown in FIG. 5 and FIG. 6, in the second embodiment, the inflator 26 is inserted into the retainer 29, and the caulking portion 40 of the retainer 29 is caulked so that the diameter thereof is reduced. It is fixed to. The retainer 29 in which the inflator 26 is inserted is further inserted into the inner tube 28. As shown in FIG. 6, the bolt 41 is inserted through the locking hole 45 formed in the inner tube 28, the mounting hole 42, and the fixing hole 43 in this order, and the nut 44 is screwed into the retainer 29, the inner The tube 28 and the airbag 27 are fixed to the case 25.

Now, when gas is ejected from the gas ejection port 31a, the ejection gas flows upward and downward in the inner tube 28 as indicated by arrows in FIG. The downwardly ejected gas reaches the lower end opening 39 directly through the inner tube 28. On the other hand, the gas jetted upward reaches the upper end opening 38 through the gap between the outer peripheral surface of the inflator 26 and the inner tube 28 so as to avoid the caulking portion 40. As described above, the ejected gas can be circulated through the upper end opening 38 even if the gap between the inflator 26 and the retainer 29 is used in the inner tube 28. According to the second embodiment, the same effects as those described in (1) to (3), (5), and (6) in the first embodiment can be obtained.
(Third embodiment)
The third embodiment of the present invention will be described with a focus on differences from the first embodiment.

  As shown in FIGS. 7 and 8, in the inner tube 51 of the third embodiment, the opening area of the upper end opening 52 and the opening area of the lower end opening 53 are formed substantially the same. The inner tube 51 has a diameter larger than that of the inflator 26, and the lower end portion of the inflator 26 is inserted into the upper end opening 52 side. Further, a thin tube 54 as a flow rate adjusting member is interposed in a gap between the outer surface of the inflator 26 and the inner surface of the upper end opening 52. The upper end of the thin tube 54 protrudes from the upper end opening 52 and is disposed in the upper compartment 34. On the other hand, the lower end of the thin tube 54 is inserted into the inner tube 51.

  The retainer 55 is curved to match the outer peripheral surface of the inflator 26 and has a curved plate shape. The retainer 55 is mounted with the inflator 26 to which the inner tube 51 and the narrow tube 54 are mounted, and the inflator 26 is fixed by a pair of fixing bands 56. The upper end portion of the inflator 26 is fixed to the retainer 55 by one fixing band 56. The lower end of the inflator 26 is fixed to the retainer 55 by the other fixing band 56 together with the thin tube 54 and the inner tube 51. Further, the retainer 55 is provided with a pair of bolts 41 as mounting members protruding rearward.

Now, when gas is ejected from the gas ejection port 31a, the ejection gas flows upward and downward in the inner tube 51 as indicated by arrows in FIG. The downwardly ejected gas reaches the lower end opening 53 directly through the inner tube 51. On the other hand, the jet gas flowing upward is supplied to the upper compartment 34 through a gap between the narrow tube 54 and the upper end opening 52 and the outer surface of the inflator 26. In the third embodiment, the same effects as those described in (1), (5) and (6) of the first embodiment can be obtained. Furthermore, in the third embodiment, by changing the diameter of the narrow tube 54, the flow rate of the ejected gas flowing from the inner tube 51 to the narrow tube 54 is adjusted, and the supply amount of the ejected gas supplied to the upper compartment 34 is easy. Can be adjusted.
(Modification)
Note that the third embodiment may be modified and embodied as follows.

In addition to the thin tube 54, a curved plate having a semicircular cross section or a U-shaped cross section may be employed as the flow rate adjusting member.
The thin tube 54 may be provided so as to be disposed inside the upper end opening 52 without protruding the upper end from the upper end opening 52.
(Fourth embodiment)
The fourth embodiment of the present invention will be described with a focus on differences from the first embodiment.

  As shown in FIGS. 9 and 10, a fixing piece 63 is provided in the upper end opening 62 of the inner tube 61 of the fourth embodiment so as to extend upward. The fixing piece 63 has a tongue-like shape and is integrally formed with the inner tube 61 from a woven fabric made of the same material as the inner tube 61. A pair of locking holes 45 are formed in the fixed piece 63. The retainer 55 is the same as the retainer 55 of the third embodiment. The inflator 26 is placed on the retainer 55, and the inflator 26 is fixed to the retainer 55 by a pair of fixing bands 56 at the upper end portion and the lower end portion thereof.

  Now, to install the side airbag device 24, the lower end of the inflator 26 is inserted from the upper end opening 62 of the inner tube 61. Then, the bolt 41 is inserted in the order of the locking hole 45, the mounting hole 42, and the fixing hole 43, and the nut 44 is screwed to fix the retainer 55, the inner tube 61, and the airbag 27 to the case. At this time, the inner tube 61 can be fixed to the case 25 by using the fixing piece 63 in a state where the gas outlet 31a is inserted.

  When gas is ejected from the gas ejection port 31a, the ejected gas flows upward and downward in the inner tube 61 as indicated by arrows in FIG. The downwardly ejected gas reaches the lower end opening 64 directly through the inner tube 61. On the other hand, the jet gas flowing upward is supplied to the upper compartment 34 from the gap between the upper end opening 62 and the inflator 26 through the gap between the outer peripheral surface of the inflator 26 and the inner tube 61. In 4th Embodiment, the effect similar to the effect as described in (1), (5) and (6) of 1st Embodiment can be acquired. Furthermore, in the fourth embodiment, a fixing piece 63 is provided on the inner tube 61. The inner tube 61 can be fixed to the case 25 using the fixing piece 63 in a state in which the gas outlet 31a is inserted. Therefore, the inner tube 61 can be easily fixed.

The side view which shows the vehicle interior with which the side airbag apparatus of 1st Embodiment was mounted | worn. Sectional drawing of a side airbag apparatus. The disassembled perspective view which shows the main members of a side airbag apparatus. The principal part sectional drawing of a side airbag apparatus. The disassembled perspective view which shows the main members of 2nd Embodiment. The principal part sectional drawing of a side airbag apparatus. The perspective view which shows the main members of 3rd Embodiment Sectional drawing of a side airbag apparatus. The disassembled perspective view which shows the main members of 4th Embodiment. Sectional drawing of a side airbag apparatus.

Explanation of symbols

P ... Passenger, 24 ... Side airbag device, 26 ... Inflator, 27 ... Air bag, 28, 51, 61 ... Inner tube, 29 ... Retainer, 30 ... Connector part, 31a ... Gas outlet, 34 ... Upper compartment 35 ... lower compartment, 36 ... front communication passage as communication passage, 37 ... rear communication passage as communication passage, 38, 52, 62 ... upper end opening, 39, 53, 64 ... lower end opening, 54 ... A thin tube as a flow rate adjusting member, 63 ... a fixed piece.

Claims (7)

An inflator that ejects gas from a gas outlet;
An airbag that is inflated and deployed between the body side portion of the vehicle and the occupant by the jet gas;
A side airbag device comprising:
The airbag is provided with an upper compartment, a lower compartment, and a communication passage communicating the compartments, and the jet gas can flow from the lower compartment to the upper compartment via the communication passage. Composed of
Furthermore, an inner tube is provided in the airbag,
A gas outlet is inserted in the inner tube, an upper end opening of the inner tube is disposed in the upper compartment, and a lower end opening of the inner tube is disposed in the lower compartment. A side airbag device is characterized. The supply amount of the ejected gas supplied from the upper end opening of the inner tube to the upper compartment is less than the supply amount of the ejected gas supplied from the lower end opening of the inner tube to the lower compartment. The side airbag device according to claim 1, wherein the side airbag device is configured. The side airbag device according to claim 1 or 2, wherein an opening area of the upper end opening is smaller than an opening area of the lower end opening. The inflator is a cylinder type inflator in which a connector part is provided at an upper end and the gas outlet is provided in a lower end, the inflator is inserted into the inner tube, and the connector part is opened at an upper end of the inner tube. The side airbag device according to any one of claims 1 to 3, wherein the side air bag device is disposed on a portion side and the gas outlet is disposed on a lower end opening portion side of the inner tube. The side airbag device according to claim 4, further comprising a retainer for fixing the inflator to a mounting portion in a vehicle compartment, wherein the inflator and the inner tube are inserted into the retainer. The inflator is a cylinder type inflator having a connector part at the upper end and a gas outlet at the lower end, and a fixing piece for fixing the inner tube to the inflator at the upper end opening of the inner tube The side airbag device according to any one of claims 1 to 3, wherein the side airbag device is provided. The flow rate adjusting member which adjusts the flow volume of the said ejection gas is provided in the clearance gap between the outer surface of the said inflator, and the inner surface in the lower end part of the said inner tube, The any one of Claims 1-6 characterized by the above-mentioned. The side airbag device according to one item.

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