JP2007099103A - Air bag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow an air bag to be inflated and deployed quickly while an occupant is in a normal sitting attitude, and in an OOP state, exhaust a large quantity of gas at an early stage as much as possible. <P>SOLUTION: This device arrangement includes an exhaust state changeover member 30 installed at an opening 28h in an air bag body 20 with a state changeable between a non-exhausting state and an exhausting state, and a tether belt 40 coupled with part of the inside surface of the air bag body 20 and also the exhaust state changeover member 30 with a draw-in length set so as to introduce the member 30 into the air bag body 20 in a state that the air bag body 20 is inflated and deployed into a regular shape. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an airbag device for protecting a vehicle occupant.

  Conventionally, various airbag devices have been proposed as devices for protecting an occupant in an emergency such as a vehicle collision. The airbag device has a structure in which an airbag is inflated to protect an occupant by filling the airbag with gas when an automobile collides, or the like.

  In such an airbag device, it is necessary to inflate and deploy the gas in the airbag instantaneously at the time of a collision or the like. For this reason, it is necessary to prevent gas from leaking from the airbag as much as possible during inflation and deployment.

  On the other hand, the vehicle occupant may have an abnormal riding posture (out of position, hereinafter referred to as “OOP”), such as a posture leaning forward from a normal riding posture. In such a case, the airbag contacts the occupant at a relatively early stage when the airbag starts inflating and deploying. Therefore, at a relatively early stage after the start of inflation and deployment, it is necessary to exhaust the gas in the airbag to the outside to reduce the force applied to the occupant from the airbag and to absorb the impact applied to the occupant by the impact. is there.

  Japanese Patent Application Laid-Open Publication No. 2004-133707 discloses an airbag apparatus that takes such OOP countermeasures. In Patent Document 1, the lid member is sewn with a thread so as to close the vent hole. Further, a tether belt is provided so as to connect the lid member and the inner peripheral portion of the airbag. In the case of OOP or the like, when the airbag is inflated and deployed in an irregular shape, the tether belt is in a tensioned state, and the thread that sews the lid member is cut to open the vent hole.

JP 2005-153726 A

  However, in the airbag apparatus, the internal pressure is sufficiently increased in the entire airbag in the OOP state, and the vent hole is opened after the airbag has been greatly inflated and deployed in an irregular shape. . Therefore, the opening of the vent hole tends to be delayed.

  Therefore, the present invention provides a technique that allows an airbag to be inflated and deployed quickly in a normal riding posture, and that a larger amount of gas can be exhausted as early as possible in an OOP state. For the purpose.

  The airbag apparatus according to the present invention includes an airbag body provided with an exhaust state switching member, and an inflator that supplies gas into the airbag body, and the exhaust state switching member has a vent hole, A non-exhaust state that is introduced into the airbag body together with the vent hole and suppresses gas exhaust in the airbag body when the inflator is activated, and is led out of the airbag body together with the vent hole to be vented. Through the exhaust state that allows the gas in the airbag body to be exhausted, and is connected to connect a part of the inner periphery of the airbag body and the exhaust state switching member In the state in which the member is provided and the airbag main body is inflated and deployed in a normal shape when the inflator is activated, the connecting portion is In response to the inflating and deploying force due to the gas supply from the radiator, it is pulled between a part of the inner peripheral portion of the airbag body and the exhaust state switching member so that the exhaust state switching member is brought into a non-exhaust state. It is set to the pull-in length.

  In this case, the airbag body and the exhaust state switching member may be folded in a state where the exhaust state switching member is led out of the airbag body.

  Further, an exhaust opening may be formed in the airbag body.

  Furthermore, the exhaust state switching member may be provided on a side portion of the airbag body in the deployed form.

  The vent hole may be formed at a position away from a portion where the exhaust state switching member is attached to the airbag body.

  Further, the exhaust state switching member has one end portion of a pair of belt-like cloths attached to the airbag body, the other end portions of both belt-like cloths are joined, and both side openings are finished to the vent holes. There may be.

  Further, both end portions on the front end side of the exhaust state switching member may be coupled to the coupling member.

  According to the airbag device of the present invention, the airbag apparatus includes an airbag body provided with an exhaust state switching member, and an inflator that supplies gas into the airbag body, and the exhaust state switching member has a vent hole, A non-exhaust state that is introduced into the airbag body together with the vent hole and suppresses gas exhaust in the airbag body when the inflator is activated, and is led out of the airbag body together with the vent hole to be vented. Through the exhaust state that allows the gas in the airbag body to be exhausted, and is connected to connect a part of the inner periphery of the airbag body and the exhaust state switching member In the state in which the member is provided and the airbag body is inflated and deployed in a normal shape when the inflator is activated, the connecting portion is In response to the inflating and deploying force due to the gas supply from the flator, the exhaust state switching member is pulled between a part of the inner periphery of the airbag body and the exhaust state switching member so as to put the exhaust state switching member into a non-exhaust state. Since the length is set to be retracted, when the airbag body is inflated and deployed in a regular shape, the exhaust state switching member is retracted into the airbag body at least halfway. For this reason, in the middle of the inflation and deployment to the regular shape, the airbag body can be quickly inflated and deployed by reducing the gas exhaust from the airbag body as much as possible. In the case of OOP, since the occupant contacts the airbag body in the middle of the inflation and deployment of the airbag body, the internal pressure of the airbag body rises while the connecting member is loosened, and the exhaust state switching member The exhaust state switching member enters the exhaust state while being led to the outside or led to the outside. Thereby, in the case of OOP, a larger amount of gas can be exhausted at the earliest possible stage.

  In addition, when the airbag body and the exhaust state switching member are folded in a state where the exhaust state switching member is led out of the airbag body, the exhaust state switching member is not exhausted in the case of OOP. The process of changing the state from the state to the exhaust state can be omitted, and a large amount of gas can be exhausted at an earlier stage.

  Furthermore, if an exhaust opening is formed in the airbag body, various exhaust patterns can be set by combining the exhaust opening and the exhaust state switching member.

  Further, when the exhaust state switching member is provided on a side portion of the airbag body in the deployed form, it is possible to prevent interference with the exhaust state switching member, the windshield, the in-dash panel, etc., and more stable exhaust Can be done.

  Further, when the vent hole is formed at a position away from a portion where the exhaust state switching member is attached to the airbag body, gas discharge can be prevented more reliably in a non-exhaust state.

  Further, the exhaust state switching member has one end portion of a pair of belt-like cloths attached to the airbag body, the other end portions of both belt-like cloths are joined, and both side openings are finished to the vent holes. If it exists, a simple and low-cost airbag apparatus can be manufactured.

  Moreover, if the both end portions on the front end side of the exhaust state switching member are connected to the connecting member, the exhaust state switching member can be more stably guided into the airbag body.

  Hereinafter, an airbag apparatus according to an embodiment of the present invention will be described. 1 is a diagram showing a state in the middle of inflation and deployment of the airbag device, FIG. 2 is a diagram showing a state after the inflation and deployment of the airbag device is completed, and FIGS. 3 and 4 are exhaust state switching in an exhaust state. FIG. 5 and FIG. 6 are diagrams showing an exhaust state switching member in a non-exhaust state.

  The airbag device 10 is a device that is incorporated in a dashboard in front of a passenger seat of a vehicle, deploys in front of the passenger in the passenger seat at the time of a vehicle collision, etc., receives the passenger in the passenger seat, and absorbs the impact. Of course, the present invention can be applied not only to the airbag device for the passenger seat but also to the airbag for the driver's seat incorporated in the steering device.

  The airbag device 10 includes an airbag main body 20 provided with an exhaust state switching member 30, a tether belt 40 as a connecting member, and an inflator 12.

  The airbag body 20 is formed in a bag shape that can be inflated and deployed, and has at least one opening 28h. More specifically, the airbag main body 20 has a base fabric portion 22 formed in a cylindrical shape and a pair of side fabric portions 24 joined so as to close both side openings of the base fabric portion 22. Yes. The base fabric part 22 is formed in a substantially cylindrical shape by sewing both end edges of a substantially belt-like cloth. Further, the side cloth portion 24 has a widened shape capable of closing the side opening of the base cloth portion 22. And the airbag main body 20 is formed by sewing the edge part of the side cloth part 24 to the both-side opening peripheral part of the base cloth part 22 formed in the substantially cylindrical shape, respectively, and joining. Here, the airbag main body 20 is configured to be inflated and deployed in an elliptical cylindrical shape when viewed from the side.

  The airbag main body 20 is formed with a gas introduction hole 26h, a second vent hole 27h for gas discharge, and an opening 28h for gas discharge.

  The gas introduction hole 26h is formed in one side portion of the base fabric portion 22, here, in a portion facing the dashboard in a developed form. The inflator 12 is attached to the gas introduction hole 26h. The gas generated in the inflator 12 at the time of a vehicle collision or the like is introduced into the airbag body 20 through the gas introduction hole 26h.

  The second vent holes 27h are formed in both side portions of the airbag body 20 in the deployed form, that is, in the side cloth portions 24. The second vent hole 27h is always open. Then, the gas is discharged to the extent that the deployment speed of the airbag body 20 is not significantly affected during the inflation and deployment of the airbag body 20. Further, when the occupant pushes in the airbag body 20 due to an impact in a state where the airbag body 20 is completely inflated and deployed, gas is gradually discharged from the second vent hole 27h due to the pushing force, and the occupant It is designed to absorb the impact of

  Note that the position, number, and shape of the second vent hole 27h are not limited to the above example. Further, as will be described later, when the exhaust state switching member 30 has a function of discharging gas in a state where the airbag body 20 is completely inflated and deployed, the second vent hole 27h is omitted. May be.

  The gas discharge opening 28h is formed at one side of the base fabric part 22, here, at a position obliquely above and in front of the gas introduction hole 26h (position facing the front window) in a developed form. Further, here, the opening 28 h is formed in a long hole shape extending along the width direction of the airbag body 20. However, the opening 28h is not limited to a long hole shape, and may be formed in a circular hole shape or a substantially polygonal hole shape.

  The exhaust state switching member 30 is a member having a first vent hole 32h, and is provided in the opening 28h in the airbag body 20. When the exhaust state switching member 30 is led out of the airbag body 20 together with the first vent hole 32h forming portion, the exhaust state switching member 30 is in an exhaust state in which the gas in the airbag body 20 can be exhausted through the first vent hole 32h. (See FIGS. 1, 3 and 4). On the other hand, when the exhaust state switching member 30 is introduced into the airbag main body 20 together with the first vent hole 32h forming portion, the exhaust state switching member 30 covers the opening 28h so as to block the gas exhaust in the airbag main body 20. (See FIGS. 2, 5 and 6). And it is comprised so that a state change is possible between these both states with the drawing-in force by the tether belt 40 mentioned later, or the internal pressure of the airbag main body 20. FIG.

  More specifically, the exhaust state switching member 30 has a pair of belt-like cloths 32. One end portions (base end portions) of the pair of belt-like cloths 32 are sewn so as to surround the peripheral edge portion of the opening 28 h in the airbag body 20. The exhaust state switching member 30 may be sewn to the airbag body 20 on the outer surface of the airbag body 20. Further, the other end portions (tip portions) of the pair of belt-like cloths 32 are stitched together and joined substantially over the entire width direction. Further, both side portions of the pair of belt-like cloths 32 are stitched and joined only at their base ends, and the other portions are in an open state where they are not stitched. And the 1st vent hole 32h is comprised by the part enclosed by the non-sewn part among the both sides of a pair of strip | belt-shaped cloth 32. As shown in FIG. In addition, since the base end of the both sides of a pair of strip | belt-shaped cloth 32 is stitched over predetermined length, the opening part 28h and the 1st vent hole 32h are not in the continuous positional relationship, but are mutually separated positions. Will be formed.

  Further, the width dimension of the pair of belt-like cloths 32 is set larger than the width dimension of the opening 28h, and therefore the width dimension of the exhaust state switching member 30 is also set larger than the width dimension of the opening 28h. Yes. When the airbag main body 20 moves from the inside to the outside or vice versa, the exhaust state switching member 30 can pass through the opening 28h while being deformed so as to shrink in the width direction. Resistor is acting. This prevents the exhaust state switching member 30 from inadvertently changing the state when a pulling force by a tether belt 40, which will be described later, or when an internal pressure exceeding a predetermined value does not act on the airbag body 20.

  The tether belt 40 is an elongated connecting member that is connected to a part of the inner peripheral portion of the airbag body 20 and the exhaust state switching member 30. The tether belt 40 receives an inflating and deploying force due to gas supply from the inflator 12 in a state where the airbag body 20 is inflated and deployed in a regular shape (see FIG. 2), and a part of the inner peripheral portion of the airbag body 20 and the exhaust gas. The length is set so as to be pulled with the state switching member 30 so that the exhaust state switching member 30 is introduced into the airbag body 20.

  More specifically, the tether belt 40 is formed in an elongated strip shape.

  One end of the tether belt 40 is connected to the tip of the exhaust state switching member 30. Here, both end portions on the distal end side of the exhaust state switching member 30 are connected to the tether belt 40. That is, one end portion of the tether belt 40 is formed to have substantially the same width as the tip portion of the exhaust state switching member 30. Here, the tip of the tether belt 40 is formed in a shape that spreads in a substantially Y shape. Then, both end portions extending in a substantially Y shape are sewn on both sides of the distal end portion of the exhaust state switching member 30. As a result, the tether belt 40 pulls the exhaust state switching member 30 into the airbag body 20 so as to pull both end portions on the front end side of the exhaust state switching member 30.

  Further, the other end portion of the tether belt 40 is attached to the inner peripheral portion of the airbag body 20 by sewing. Here, the other end portion of the tether belt 40 is attached to a position facing the opening 28 h in the inner peripheral portion of the airbag body 20.

  Further, the length of the tether belt 40 is set to such a length dimension that the exhaust state switching member 30 is pulled substantially linearly in the airbag body 20 in a state in which the airbag body 20 is expanded and inflated into a regular shape. . Accordingly, the exhaust state switching member 30 is gradually drawn into the airbag body 20 against the internal pressure of the airbag body 20 during the deployment of the airbag body 20.

  The airbag device configured as described above is housed in a folded state in a dashboard in front of the passenger seat of the vehicle in a state of being assembled with the inflator 12. At this time, the exhaust state switching member 30 may be folded in a manner led out of the airbag body 20 or may be folded in a manner introduced into the airbag body 20. Here, it demonstrates by the structure of being folded in the former aspect, and the merit in that case is also mentioned later.

  When the vehicle collides or the like, the gas generated in the inflator 12 is introduced into the airbag body 20 through the gas introduction hole 26h.

  Here, when the passenger in the passenger seat is seated in a normal riding posture with the back in contact with the backrest, the passenger seat is inflated and deployed through an intermediate form as shown in FIG. In this state, since the gas from the inflator is jetted into the airbag body 20, the discharge of the gas through the exhaust state switching member 30 is small enough not to cause a problem.

  The exhaust state switching member 30 is guided into the airbag body 20 as it expands and deploys. When the exhaust state switching member 30 is guided into the airbag body 20, as shown in FIGS. 5 and 6, the exhaust state switching member 30 is in the airbag body 20 with the first vent hole 32h substantially closed. Thus, the non-exhaust state is reached so as to cover the opening 28h. As a result, in a state where the gas exhaust is reduced as much as possible, it rapidly expands and develops into the regular shape shown in FIG.

  The airbag body 20 that is almost completely inflated and deployed receives the passenger on the passenger seat that moves forward due to the impact of the vehicle collision. After the airbag body 20 receives the occupant, the gas is exhausted from the vent hole 32h to gradually absorb the occupant's impact. Of course, at this time, the airbag main body 20 is deformed so as to receive the impact of the occupant and the occupant side portion is reduced, so that the tether belt 40 is loosened and the exhaust state switching member 30 is moved outside the airbag main body 20 by the internal pressure. By being derived, gas may be introduced through the exhaust state switching member 30.

  On the other hand, in the case of OOP including the case where the passenger seat occupant is bent forward, the airbag body 20 abuts against the occupant while the airbag body 20 is inflated and deployed as shown in FIG. Thereby, expansion | swelling of the airbag main body 20 is prevented. As a result, the internal pressure in the airbag body 20 rises with the tether belt 40 still slackened. Then, since the exhaust state switching member 30 is outside the airbag body 20, as shown in FIGS. 3 and 4, the gas in the airbag body 20 passes through the exhaust state switching member 30 from the opening 28h to the first. The vent holes 32h are exhausted to the outside. That is, the exhaust state switching member 30 is in an exhaust state in a shape other than the case where the airbag body 20 is deployed in a regular shape.

  When the exhaust state switching member 30 is in the airbag main body 20 in the initial folded form, the air bag main body 40 remains loose and the airbag main body 20 is inflated by the OOP. As the internal pressure in the bag body 20 increases, the exhaust state switching member 30 is pushed out of the airbag body 20 by the internal pressure. And gas comes to be discharged like the above.

  As described above, the force applied to the occupant by the inflation and deployment of the airbag body 20 can be reduced. Further, the gas discharge via the exhaust state switching member 30 can be continued while absorbing the impact applied to the occupant by the collision impact of the vehicle.

  According to the airbag device 10 configured as described above, the exhaust state switching member 30 that is freely changeable between the non-exhaust state and the exhaust state is attached to the opening 28h of the airbag body 20, The exhaust state switching member 30 is introduced into the airbag main body 20 in a state where the airbag main body 20 is connected to a part of the inner peripheral portion of the airbag main body 20 and the exhaust state switching member 30 and inflated and deployed in a regular shape. When the airbag main body 20 is inflated and deployed in a regular shape, the exhaust state switching member 30 is retracted toward the airbag main body 20 at least halfway. It is. For this reason, in the middle of the inflation and deployment to the regular shape, the gas exhaust from the airbag body 20 can be reduced as much as possible, and the airbag body 20 can be quickly inflated and deployed.

  In the case of OOP, since the occupant contacts the airbag body 20 in the middle of the inflation and deployment of the airbag body, the internal pressure of the airbag body 20 rises while the tether belt 40 is slackened, and the exhaust state is switched. The member 30 is led out to the outside or led to the outside to be in an exhaust state. Thereby, in the case of OOP, a larger amount of gas can be exhausted at the earliest possible stage.

  In particular, by folding the airbag body 20 and the exhaust state switching member 30 in a state where the exhaust state switching member 30 is led out of the airbag body 20, the exhaust state switching member 30 can be used in the case of OOP. The process of changing the state from the inside non-exhaust state to the exhaust state outside the airbag body 20 can be omitted, and a large amount of gas can be exhausted at an earlier stage, which is effective as an OOP countermeasure.

  Further, since the airbag body 20 is provided with a first vent hole 27h as an exhaust opening separately from the opening provided with the exhaust state switching member 30, the exhaust structure thereof is provided. Various combinations of exhaust patterns can be set by combining the two.

  Further, since a stitched portion is interposed between the opening 28h and the first vent hole 32h and these are formed at positions separated from each other, the base end portion of the vent hole 32h is not exhausted. The internal pressure of the airbag body 20 overlaps closely and performs a kind of valve action, making it difficult for gas to leak from the first vent hole 32h through the opening 28h, and more reliably preventing gas discharge.

  Further, the exhaust state switching member 30 attaches one end of a pair of belt-like cloths 32 formed wider than the opening 28h to the opening 28h of the airbag body 20, and joins the other ends of both belt-like cloths 32. Since the opening on both sides is finished to the first vent hole 32h, the airbag can be manufactured with a relatively simple configuration and at a low cost.

  Further, since both end portions on the front end side of the exhaust state switching member 30 are connected to the tether belt 40, the tether belt 40 pulls the both end portions on the front end side of the exhaust state switching member 30 so that the exhaust state switching member 30 is connected to the airbag. Pull into the body 20. Thereby, the attitude | position of the exhaust state switching member 30 can be stabilized in the airbag main body 20, and it can be set as the stable non-exhaust state.

  In the above-described embodiment, the positions of the opening 28h and the exhaust state switching member 30 are described as an example in which the position is an obliquely upper front position (a position facing the front window) of the gas introduction hole 26h in the deployed form. The position is not limited. In the case of OOP, the opening 28h and the exhaust state switching member 30 are in a position where the exhaust state is prevented and exhaust is not hindered, for example, a position where an occupant in the case of OOP does not contact the airbag body 20, that is, an air What is necessary is just to be provided in the position except the passenger | crew side part of the bag main body 20. FIG.

  For example, in the modification shown in FIG. 7, the opening 128 h (corresponding to the opening 28 h) and the exhaust state switching member 130 (corresponding to the exhaust state switching member 130) are combined with the airbag body 120 (airbag body) in the deployed form. 120). Even in this modified example, as described above, when the airbag main body 20 is deployed in a regular shape, the tether belt 40 draws the exhaust state switching member 30 into the airbag main body 20 to be in the non-exhaust state. On the other hand, when the expansion and deployment of the airbag main body 20 is hindered by OOP, the tether belt 40 remains loose and the exhaust state switching member 30 enters the exhaust state outside the airbag main body 20. For this reason, the same operation | movement as the said embodiment is realizable.

  In particular, in this modified example, the exhaust state switching member 130 is provided at a side portion of the airbag main body 120 in the deployed form, so that the exhaust state switching member 30 is out of the airbag main body 120. Even when the air-conditioner jumps out, the exhaust state switching member 30 can be prevented from interfering with the windshield or in-dash panel of the vehicle, and there is an advantage that more stable exhaust can be performed.

  In the above embodiment, the connection destination of the other end of the tether belt 40, 140 is provided at a position facing the opening 28h in the airbag main body 20, 120 and facing the front of the occupant. There is no need. That is, the distance between the position of the opening 28h, which is the mounting position of the exhaust state switching members 30, 130, and the connecting position of the other end of the tether belt 40 is greater than in the case of the airbag bodies 20, 120 deployed in a regular shape. In the case of OOP, the positional relationship that the airbag main bodies 20 and 120 deployed halfway becomes smaller is sufficient.

  For example, in the modification shown in FIG. 7, as shown in FIG. 8, the connection destination of the tether belt 140 is an oblique side position of the occupant side portion of the airbag main body 120, or as shown in FIG. The connection destination 140 may be located obliquely below the passenger side portion of the airbag body 120. In FIG. 8 and FIG. 9, the range assumed as the position of the tether belt 140 is indicated by diagonal mesh lines.

  In the case of OOP, since it is assumed that the occupant takes a largely forward leaning posture, the inflation and deployment of the airbag body 120 is hindered at a relatively initial stage of the inflation and deployment process of the airbag body 120. For this reason, it is considered that the positional relationship is satisfied even when the airbag main body 120 is deployed in a regular shape and is a side portion or a lower portion or an upper portion that is deviated from the front portion of the occupant that is assumed to contact the occupant. .

  10 to 12 are views showing modifications of the exhaust state switching member.

  In the exhaust state switching member 230 shown in FIG. 10, the bottom side 232a which is the long side of the pair of substantially trapezoidal cloths 232 is attached to the opening 28h of the airbag body 20 by sewing, and the short side of the pair of substantially trapezoidal cloths 232 is attached. The upper sides 232b, which are the sides, are sewn and joined together. Then, one end of the long tether belt 240 is connected to the joint portion of the upper side of the pair of substantially trapezoidal cloths 232. In addition, a pair of first vent holes 232 h (see thick line portions) are formed by the portions surrounded by the oblique sides 232 c of the pair of substantially trapezoidal cloths 232.

  In the exhaust state switching member 330 shown in FIG. 11, the bottom side 332a, which is the long side of the pair of substantially trapezoidal cloths 332, is sewn and attached to the opening 28h of the airbag body 20, and both the pair of substantially trapezoidal cloths 332 are attached. The hypotenuses 332c are stitched together. Then, one end of a long tether belt 340 is connected to each upper side 332b of the pair of substantially trapezoidal cloths 332. In addition, a first vent hole 332h (refer to a thick line portion) is formed by a portion surrounded by the upper side 332b of the pair of substantially trapezoidal cloths 332.

  In the exhaust state switching member 430 shown in FIG. 12, the bottom side 432a, which is the long side of the pair of substantially trapezoidal cloths 432, is sewn and attached to the opening 28h of the airbag body 20, and both of the pair of substantially trapezoidal cloths 432 are attached. The oblique sides 432c and the upper sides 432b are sewn and joined. Then, one end of a long tether belt 440 is connected to each upper side of the pair of substantially trapezoidal cloths 432. Further, a hole is formed in one or both of the pair of substantially trapezoidal cloths 432, and this is used as a first vent hole 432h.

  Even in the case of each of these modifications, the state of non-exhaust and exhaust is switched by being introduced into the airbag body 20 or led out to the outside in the same manner as in the above embodiment.

It is a figure which shows the state in the middle of expansion | deployment of the airbag apparatus which concerns on embodiment. It is a figure which shows the state after completion of expansion | deployment of the airbag apparatus same as the above. It is a side view which shows the exhaust state switching member in an exhaust state. It is a top view which shows the exhaust state switching member in an exhaust state. It is a side view which shows the exhaust state switching member in a non-exhaust state. It is a top view which shows the exhaust state switching member in a non-exhaust state. It is a figure which shows the modification regarding the position of an opening part and an exhaust state switching member. It is a figure which shows an example of the connection position of a tether belt. It is a figure which shows the other example of the connection position of a tether belt. It is a figure which shows the modification of an exhaust state switching member. It is a figure which shows the other modification of an exhaust state switching member. It is a figure which shows the further another modification of an exhaust state switching member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Airbag apparatus 20 Airbag main body 27h 2nd vent hole 28h Opening part 30 Exhaust state switching member 32 Strip | belt-shaped cloth 32h 1st vent hole 40 Tether belt

Claims (7)

An airbag body provided with an exhaust state switching member;
An inflator for supplying gas into the airbag body;
With
The exhaust state switching member has a vent hole, and is introduced into the airbag main body together with the vent hole to suppress gas exhaust in the airbag main body when the inflator is activated, and together with the vent hole It is configured to be freely changeable between an exhaust state that is led out of the airbag body and allows the gas in the airbag body to be exhausted through the vent hole.
A connecting member is provided so as to connect a part of the inner peripheral portion of the airbag body and the exhaust state switching member, and the connecting portion is in a state where the airbag body is inflated and deployed into a normal shape when the inflator is activated. Is inflated and deployed by the gas supply from the inflator and pulled between a part of the inner peripheral portion of the airbag body and the exhaust state switching member to bring the exhaust state switching member into a non-exhaust state. An airbag device set to a length that is retracted. The airbag device according to claim 1,
The airbag device in which the airbag body and the exhaust state switching member are folded in a state where the exhaust state switching member is led out of the airbag body. The airbag device according to claim 1 or 2,
An airbag device in which an exhaust opening is formed in the airbag body. The airbag device according to any one of claims 1 to 3,
The exhaust state switching member is an airbag device provided at a side portion of the airbag main body in a deployed form. The airbag device according to any one of claims 1 to 4,
The vent hole is an airbag device formed at a position away from a portion where the exhaust state switching member is attached to the airbag body. The airbag device according to any one of claims 1 to 5,
The exhaust state switching member attaches one end of a pair of belt-like cloths to the airbag body, joins the other ends of the two belt-like cloths, and finishes both side openings into the vent holes. Airbag device. The airbag device according to any one of claims 1 to 6,
An airbag device in which both end portions on the front end side of the exhaust state switching member are coupled to the coupling member.

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