JP4490376B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device mounted on a vehicle or the like.

In the airbag apparatus disclosed in Patent Document 1 below, when the body of an occupant who moves inertially forward to the front side of the vehicle due to sudden deceleration of the vehicle abuts against the bag body inflated and deployed by gas and pressurizes the bag body The valve body opens the gas vent air vent and discharges a part of the gas to the outside, thereby adjusting the gas pressure in the bag body to a certain level or less.
JP 2000-64415 A

  However, the structure disclosed in Patent Document 1 is provided in a retainer that supports the bag. For this reason, it is difficult to improve the responsiveness from the pressurization of the bag body inflated and deployed by the occupant until the gas is released by the air vent.

  In view of the above fact, an object of the present invention is to obtain an airbag device that has good degassing response when an inflated and deployed bag body is pressurized.

The airbag apparatus according to the first aspect of the present invention includes a bag body that is inflated and deployed by the pressure of gas supplied to the inside thereof, and in which a hole for venting gas is formed, and a valve that closes the hole. An internal pressure adjusting means for opening the hole by moving the valve body when the internal pressure of the bag body exceeds a certain size , and further having an outer peripheral shape toward one end side. Is formed by a coil spring that enters the inner side of the one located on one end side of the pitch portions adjacent to each other in the compressed state against the biasing force, A biasing means that is elastically deformable in a direction perpendicular to the opening of the hole and biases the valve body in a direction to close the hole; and a direction perpendicular to the opening of the hole against the biasing force of the coil spring And holding the coil spring in a compressed state while the bag body is inflated. It is characterized by being configured the pressure adjusting means including holding means for releasing the holding of the coil spring upon deployment, the.

In the airbag apparatus according to the first aspect of the present invention, when the bag body is pressurized from the outside by forming the hole for venting in the bag body, the internal pressure rising in the bag body is increased. The gas in the bag tends to escape from the hole earlier than acting on the support side that supports the open end of the bag. The hole is closed by a valve body biased by the biasing force of a biasing means constituted by a coil spring. If the pressure of the gas to be released from the hole exceeds a certain level , the hole is closed . The valve body is moved against the urging force of the urging means, whereby the hole is opened and gas is released from the hole.

On the other hand, in a state where the bag body is not inflated and deployed, the conical coil spring constituting the urging means is held by the holding means in a compressed state . When the conical coil spring constituting the urging means has a smaller outer peripheral shape toward one end side and is compressed against the urging force, the other end is located on one end side among the pitch portions adjacent to each other. It enters the inside of the side located on the side, and in the compressed state, it is generally spiral, and the thickness dimension is about the coil wire diameter. Since the holding means holds the coil spring in such a state that the thickness dimension of the coil spring is as thin as the coil wire diameter, the internal pressure adjusting means can be thinned and the internal pressure adjusting means can be disposed between the folded bag bodies. For this reason, even if an urging means is attached to a bag body corresponding to a hole, a bag body can be folded up compactly. That is, in the airbag device according to the present invention, since the urging means does not become a major obstacle when the bag body is folded compactly, a hole is provided in the bag body, and an internal pressure adjusting means is provided corresponding to the hole. It can be provided in the bag. Thereby, the responsiveness of degassing when the internal pressure exceeds a certain level is improved.

According to a second aspect of the present invention, in the air bag apparatus according to the first aspect of the present invention, the internal pressure adjusting means guides the valve body in a direction in which it is in contact with or separated from the hole. While restricting the movement of the valve body in a direction other than the direction of contact and separation, the valve body can be folded in a direction inclined with respect to a direction perpendicular to the opening of the hole, and in the folded state, the hole is less than the state before bending . It is characterized by comprising guide means whose dimensions along the direction perpendicular to the opening are shortened.

In the airbag device according to the second aspect of the present invention, the movement of the valve body in a direction other than the direction in which the valve body is in contact with or separated from the hole is restricted by being guided by the guide means. On the other hand, the guide means can be folded in a direction inclined with respect to the opening of the hole and perpendicular to the opening, and in the folded state, the dimension along the opening of the hole is perpendicular to the state before the bending, that is, the bag. The dimension along the thickness direction of the cloth constituting the body is shortened. For this reason, the bag body can be folded compactly by folding the guide means when the bag body is folded. That is, in the airbag apparatus according to the present invention, since the guide means does not become a major obstacle when the bag body is folded compactly, a hole is provided in the bag body, and the internal pressure adjusting means is provided in the bag corresponding to the hole. Can be provided on the body. Thereby, the responsiveness of degassing when the internal pressure exceeds a certain level is improved.

  As described above, in the airbag device according to the first aspect of the present invention, the degassing response when the internal pressure exceeds a certain level is high.

Moreover, because be held by the holding means the thickness of the coil springs to compress the coil spring (urging means) with thinned state the coil wire diameter of about a state before the bag is deployed, the inner pressure adjusting means It can be made thin, and the bag can be folded compactly even if the internal pressure adjusting means is attached to the bag.

In the airbag device according to the second aspect of the present invention, the inner pressure is adjusted to the bag body by bending the guide means for guiding the valve body and shortening the dimension of the guide means along the direction perpendicular to the opening of the hole. Even if a means is provided, the bag can be folded compactly.

<Configuration of the present embodiment>
FIG. 1 is a perspective view showing a configuration of a vehicle passenger seat airbag device 10 (hereinafter simply referred to as “airbag device 10”), which is an aspect of an airbag device according to an embodiment of the present invention. ing. In each of the drawings including FIG. 1, the direction of arrow LF indicates the left side of the vehicle when the airbag device 10 is mounted on a vehicle (not shown), and the direction of arrow FR indicates that the airbag device 10 is mounted on a vehicle (not shown). The state substantially indicates the front of the vehicle, and the arrow UP direction indicates substantially upward of the vehicle when the airbag device 10 is mounted on a vehicle (not shown).

  As shown in FIG. 1, the airbag device 10 includes a module case 12. The module case 12 is disposed, for example, on the back side (front side) of the instrument panel (not shown) on the front side of the passenger seat of the vehicle. The module case 12 is formed in a box shape opened upward, and an inflator (not shown) as a gas generating means is provided inside the module case 12. Further, a bag body 14 is attached to the module case 12. The bag body 14 is formed in a bag shape as a whole, and the opening edge is locked to the inner bottom portion and the inner peripheral portion of the module case 12 in a state where the inflator is covered from above.

  In FIG. 1, the bag body 14 is shown in an inflated and expanded state, but the bag body 14 is usually accommodated inside the module case 12 in a folded state. One or more straps (not shown) are provided inside the bag body 14. The strap is formed in a flexible narrow band shape, and both longitudinal ends thereof are locked at appropriate positions inside the bag body 14. When the gas from the inflator is supplied to the bag body 14 and the bag body 14 is expanded and expanded by the pressure of the gas, the expansion and expansion of the bag body 14 are partially restricted by the tension of the strap. Thereby, as shown in FIG. 1, the bag body 14 has a pair of side cloth parts 16 (only one side cloth part 16 is shown in FIG. 1) facing in the left-right direction, and these side cloth parts. It becomes the shape which has the surrounding fabric part 18 provided so that the outer peripheral part of 16 might be connected.

  As shown in FIG. 3, the bag body 14 having the above structure has a vent hole 20 as a hole formed in the side cloth portion 16, and the bag body 14 is connected to the inside and outside through the vent hole 20 in addition to the opening edge. Are communicating. Corresponding to the vent hole 20, the side cloth portion 16 is provided with an active vent 22 as an internal pressure adjusting means. Here, FIG. 2 shows the configuration of the active vent 22 in an exploded perspective view.

  As shown in FIG. 2, the active vent 22 includes a base plate 24. The base plate 24 is formed in a disc shape, and a circular hole 26 coaxial with the outer peripheral portion is formed. The base plate 24 is fixed to the side cloth portion 16 so that the circular hole 26 is substantially coaxial with the vent hole 20. A valve body 28 is provided on the side of the base plate 24 opposite to the side cloth portion 16. The valve body 28 has a circular shape whose outer peripheral shape is larger than the inner peripheral shape of the circular hole 26, and is curved into a concave shape opened toward the opposite side of the base plate 24 with a predetermined position on the opposite side of the base plate 24 as the center of curvature. is doing.

  A ring-shaped peripheral wall 30 is erected from the outer peripheral portion of the valve body 28 toward the side opposite to the base plate 24. A first ring portion 32 is erected on the base plate 24 corresponding to the peripheral wall 30. The first ring portion 32 has a ring shape whose inner diameter is larger than the outer diameter of the peripheral wall 30 and is provided coaxially with the circular hole 26. In the first ring portion 32, a plurality of restriction pieces 34 (three in every 120 degrees in the present embodiment) are formed for each predetermined angle around the center. The restriction piece 34 is thicker than the first ring portion 32, and the length from the center of the first ring portion 32 to the restriction piece 34 along the radial direction of the first ring portion 32 is the inner diameter dimension of the first ring portion 32. Shorter than the outer diameter of the peripheral wall 30. For this reason, when the valve body 28 is arranged inside the first ring portion 32, the regulating piece 34 comes into contact with the outer peripheral portion of the peripheral wall 30, and the valve body 28 is not prepared along the radial direction of the first ring portion 32. Restricts the displacement.

  A ring-shaped second ring portion 36 is provided coaxially with respect to the first ring portion 32 on the outer side in the radial direction of the first ring portion 32 on the base plate 24. The second ring portion 36 is formed with a plurality of guide pieces 38 (three in every 120 degrees in this embodiment) as guide means for each predetermined angle around the center thereof. These guide pieces 38 are provided between a plurality of restricting pieces 34 provided on the first ring portion 32 (that is, an intermediate portion between two restricting pieces 34 adjacent in the circumferential direction of the first ring portion 32). ing. These guide pieces 38 are thin plate-like plates having a thickness direction along the radial direction of the second ring portion 36, and their longitudinal base ends are connected to the second ring portion 36.

  As shown in FIG. 2, the distal end side of the guide piece 38 extends to the side of the second ring portion 36 in the axial direction (that is, one in the thickness direction of the base plate 24), but the guide piece 38 is thin. Therefore, the guide piece 38 can be bent or bent around an axis whose axial direction is the width direction. As shown in FIG. 3, the guide piece 38 is centered on the base end portion and the distal end side is the radius of the second ring portion 36. It can be bent or bent so as to extend inward in the direction. A plurality of valve-body-side slide pieces 40 are extended from the outer peripheral portion of the peripheral wall 30 corresponding to these guide pieces 38. These valve element side slide pieces 40 are formed in a plate shape in the thickness direction along the axial direction of the peripheral wall 30.

  Further, the valve body side slide pieces 40 are formed with rectangular valve body side guide holes 42 penetrating in the thickness direction, and the corresponding guide pieces 38 pass through the valve body side guide holes 42. By passing the guide piece 38 through these valve body side guide holes 42, the valve body side slide piece 40, and thus the valve body 28, is guided by the guide piece 38 and is in a direction to come in contact with and away from the base plate 24 (that is, the circular hole 26. In the axial direction).

  Further, the valve body side slide piece 40 in which the valve body side guide hole 42 is formed has a thickness dimension smaller than the axial dimension of the peripheral wall 30, and the vicinity of the end of the peripheral wall 30 opposite to the side on which the valve body 28 is formed. The dimension from the end of the peripheral wall 30 on the base plate 24 side to the valve element side slide piece 40 is larger than the standing dimension of the first ring part 32 and the second ring part 36 from the base plate 24. For this reason, even if the guide piece 38 passes through the valve element side guide hole 42, the peripheral wall 30 is positioned inside the first ring portion 32, and the valve element 28 can contact the base plate 24.

  On the other hand, as shown in FIG. 2, a support body 44 is disposed on the opposite side of the valve body 28 from the base plate 24. The support body 44 is formed in a disk shape whose outer diameter dimension is substantially equal to the inner diameter dimension of the second ring portion 36. A plurality of support-side slide pieces 46 are extended from the outer peripheral portion of the support 44 so as to correspond to the respective guide pieces 38. A support body side guide hole 48 equivalent to the valve body side guide hole 42 is formed in the support body side slide piece 46, and the guide piece 38 that has passed through the valve body side guide hole 42 passes through the support body side guide hole 48. A stopper 50 larger than the valve body side guide hole 42 and the support body side guide hole 48 is formed at the distal end portion of the guide piece 38. When the support body side slide piece 46 reaches the distal end side of the guide piece 38, The piece 50 abuts against the support side slide piece 46 to prevent the guide piece 38 from coming out of the support side guide hole 48.

  In addition, a coil spring 52 as an urging means is disposed between the valve body 28 and the support body 44. The coil spring 52 is slightly smaller in outer diameter at one end than the inner diameter of the peripheral wall 30, and one end of the coil spring 52 enters the inner side of the peripheral wall 30 and contacts the valve body 28. In addition, the coil spring 52 gradually decreases in outer diameter and inner diameter toward the other end side, and has a truncated cone shape as a whole in a front view and a side view. It is set to be equal to or larger than the outer diameter of the pitch adjacent to the pitch at the other end side.

  As shown in FIGS. 2 to 5, a plurality of engagement pieces 54 are formed from the surface of the support body 44 on the valve body 28 side. These engaging pieces 54 are located on the circumference of an imaginary circle whose outer peripheral part is coaxial with the outer peripheral part of the support body 44 and whose diameter dimension is slightly smaller than the inner diameter dimension at the other end part of the coil spring 52. is doing. These engagement pieces 54 enter the inside of the coil spring 52 from the other end portion of the coil spring 52, and the other end portion of the coil spring 52 into which the engagement piece 54 enters is in contact with the support body 44.

  Here, the length from one end to the other end of the coil spring 52 in a state where no external force is applied to the coil spring 52, that is, the free length of the coil spring 52 is such that the valve element 28 abuts the base plate 24, and , Longer than the length from the valve body 28 to the support body 44 in a state in which the retaining piece 50 is in contact with the support side slide piece 46. Therefore, as shown in FIG. The coil spring 52 whose other end is in contact with the support body 44 whose separation is restricted presses the valve body 28 against the base plate 24 with its urging force to close the circular hole 26.

  On the other hand, the support body 44 is formed with a circular hole 56 coaxial with the outer periphery of the support body 44. A lock piece 58 is disposed inside the circular hole 56. The lock piece 58 is formed in a bottomed cylindrical shape whose outer diameter is sufficiently smaller than the inner diameter of the circular hole 56, and the circular hole 56 is formed by a plurality of holding pieces 60 extending from the inner periphery of the circular hole 56. The lock piece 58 is held so as to be slidable only along the axial direction. A plurality (three in this embodiment, every 120 degrees) of connecting strings 62 extend radially from the outer peripheral portion of the lock piece 58. A guide portion 64 is formed on the support body 44 so as to correspond to the connecting strings 62.

  These guide portions 64 are formed with guide holes 66 penetrating along the radial direction of the support body 44, and the connecting string 62 passes through the guide portion 64 and protrudes outward from the outer peripheral portion of the support body 44. Yes. A locking piece 68 constituting a holding means is formed at the tip of the connecting string 62. These locking pieces 68 have an outer peripheral shape that is thicker and thicker than the connecting string 62. Corresponding to these locking pieces 68, a plurality (three in this embodiment) of holding pieces 70, each of which forms holding means together with the locking pieces 68, are formed on the base plate 24. These holding pieces 70 are provided along the second ring portion 36 at regular intervals (in this embodiment, every 120 degrees). Each holding piece 70 is formed with a through hole 72 penetrating along the radial direction of the second ring portion 36.

  When the guide hole 66 and the through hole 72 face each other along the radial direction of the base plate 24 and the support body 44, the locking piece 68 that passes through the guide hole 66 and protrudes to the outside of the guide hole 66 enters the through hole 72. be able to. Thus, in a state where the locking piece 68 enters the through hole 72, the support body 44 is held in a state of approaching the base plate 24 against the biasing force of the coil spring 52.

  On the other hand, a through hole 74 is formed in the upper bottom of the lock piece 58, and one end of a flexible long string-like release string 76 passes through the through hole 74 and enters the inside of the lock piece 58. Yes. A retaining member 78 having an outer peripheral shape larger than the inner diameter of the through hole 74 is attached to one end of the release string 76 that has entered the inside of the lock piece 58, and one end side of the release string 76 comes out of the lock piece 58. To prevent that. The other end portion of the release string 76 is fixed to the inner peripheral portion of the module case 12 described above. In the deployed state of the bag body 14 shown in FIG. 1, the entire length of the release cord 76 and the module case 12 can be moved so that the lock piece 58 can be moved by pulling the lock piece 58 to the opposite side of the valve body 28 of the support body 44. The fixed part of the release string 76 is set.

<Operation and effect of the present embodiment>
Next, the operation and effect of the present embodiment will be described.

  As described above, in the active vent 22 of the airbag device 10, the overall shape of the coil spring 52 is a truncated cone shape in front view and side view, and the inner diameter dimension at each pitch is different from that pitch. Since it is set to be equal to or larger than the outer diameter dimension of the adjacent pitch on the end side, the pitch adjacent to each other along the axial direction of the coil spring 52 in the free length state is supported on the inner side of the pitch on the valve body 28 side. The coil spring 52 can be contracted by causing the one end side and the other end side of the coil spring 52 to approach each other against the biasing force of the coil spring 52 until the pitch on the side of 44 is arranged. Therefore, when the coil spring 52 is most contracted, the axial dimension of the coil spring 52 is about the wire diameter of the coil material constituting the coil spring 52.

  Thus, when the coil spring 52 is contracted, the locking piece 68 protruding from the guide hole 66 along the radial direction of the support body 44 can enter the through hole 72. In a state where the locking piece 68 enters the through hole 72, the support side guide hole 48 is held close to the valve body 28 against the urging force of the coil spring 52 as shown in FIG. The overall thickness of the active vent 22 along the thickness direction of 24 is the thinnest state, that is, the retractable state. When the bag body 14 is folded and accommodated in the module case 12, the bag body 14 is folded so that the active vent 22 in a retractable state is disposed between the folded side cloth portions 16.

  When the airbag device 10 is activated and gas is supplied to the inside of the bag body 14, the bag body 14 moves to the outside of the module case 12 due to the expansion and deployment of the bag body 14 due to an increase in the internal pressure of the bag body 14. Further, the active vent 22 moves to the outside of the module case 12 together with the side cloth portion 16 (bag 14). Further, as shown in FIG. 1, when the bag body 14 is inflated and deployed on the front side of the occupant, the release string 76 whose other end is locked to the inner peripheral portion of the module case 12 has the lock piece 58. pull. The lock piece 58 pulled in this way moves in a direction away from the valve body 28 along the central axis of the support body 44 while being guided by the holding piece 60. When the lock piece 58 moves in this manner, each connecting string 62 is pulled toward the center side of the support body 44, whereby the locking piece 68 comes out of the through hole 72.

  When the retaining piece 68 is released from the through hole 72 and the holding of the support body 44 is released, the support body 44 is urged by the coil spring 52 until the support body side slide piece 46 contacts the retaining piece 50. It is moved away from. As a result, the state of the active vent 22 changes from the retractable state shown in FIG. 3 to the valve operable state shown in FIG.

  When the internal pressure of the bag body 14 expanded and deployed as described above exceeds the biasing force of the coil spring 52 in the valve operable state, the internal pressure (that is, gas pressure) of the bag body 14 becomes the biasing force of the coil spring 52. The valve body 28 is pressed against it. Thereby, as shown in FIG. 5, the valve body 28 moves in a direction away from the base plate 24 while being guided by the guide piece 38. The movement of the valve body 28 in this way opens the circular hole 26 and thus the vent hole 20, and the gas in the bag body 14 is released from the vent hole 20. When the internal pressure of the bag body 14 becomes equal to or less than the urging force of the coil spring 52 in the valve operable state due to such gas release, the valve body 28 is moved by the urging force of the coil spring 52, and the valve body 28 causes the circular hole to move. 26 and eventually the vent hole 20 is closed. Thereby, it can prevent that the gas in the bag body 14 leaks large carelessly.

  In addition, when the bag body 14 is expanded and deployed, for example, when the occupant's body presses the bag body 14 due to the inertia of the vehicle sudden deceleration, the occupant's body presses the bag body 14 even when the bag body 14 is about to move forward. Rises. Even in such a case, if the internal pressure of the bag body 14 exceeds the urging force of the coil spring 52 in the valve operable state, the valve body 28 moves to open the circular hole 26 and thus the vent hole 20. The gas in the bag body 14 is released.

  Here, in the present embodiment, a vent hole 20 is formed in the side cloth portion 16 constituting the bag body 14, and an active vent 22 is provided corresponding to the vent hole 20. Therefore, the position of the vent hole 20 is sufficiently closer than the module case 12 to the pressing position when the body of the occupant who is about to move to the front side of the vehicle presses the inflated and deployed bag body 14 as described above. . Therefore, the increased internal pressure of the bag body 14 acts on the valve body 28 at an early stage as compared with the configuration in which the module case 12 is provided with an air vent for degassing and further provided with a valve mechanism corresponding to the air vent of the module case 12. . For this reason, the responsiveness of the valve body 28 with respect to the internal pressure rise of the bag body 14 is high, and the gas in the bag body 14 can be discharged at an early stage.

  By the way, in this Embodiment, the responsiveness of the valve body 28 with respect to the internal pressure rise of the bag body 14 is provided by providing the active vent 22 in the side cloth part 16 corresponding to the vent hole 20 of the side cloth part 16 as mentioned above. Although the gas in the bag body 14 can be released at an early stage, even if a valve mechanism having a configuration other than the active vent 22 is provided in the side cloth portion 16, the same effect can be obtained and the same effect can be obtained.

  However, in the airbag device 10, the bag body 14 before being expanded and deployed is stored in the module case 12 in a folded state. Here, in the active vent 22 applied to the airbag device 10, the dimension of the coil spring 52 along the axial direction of the base plate 24 in the retractable state is reduced to the outer diameter dimension of the wire constituting the coil spring 52. When the locking piece 68 enters the through hole 72, the coil spring 52 is held in a contracted state. For this reason, the active vent 22 can be thinned as a whole along the thickness direction of the base plate 24 in the retractable state.

  Further, the guide 44 guides the support body 44 when changing from the retractable state to the valve operable state, and guides the valve body 28 when the internal pressure of the bag body 14 is increased or after the gas is discharged from the vent hole 20. As shown in FIG. 1, the piece 38 extends in the thickness direction of the base plate 24 in a valve operable state, but the guide piece 38 can be bent or bent around an axis whose axial direction is the width direction. . For this reason, as shown in FIG. 3, the guide piece 38 is arranged around the axis whose axial direction is the width direction on the base end side so that the distal end side faces inward in the radial direction of the base plate 24 in a state where the active vent 22 can be stored. Can be bent. For this reason, the guide piece 38 does not protrude greatly in the thickness direction (axial direction) of the base plate 24 in the retractable state, and the active vent 22 is also thinned by this.

  As described above, since the active vent 22 applied to the airbag device 10 is thinned in the retractable state, the active vent 22 in the retractable state is disposed between the folded side cloth portions 16. The bag body 14 can be folded into an overall compact size and stored in the module case 12. Thereby, it becomes possible to attach the active vent 22 to the side cloth part 16 (bag body 14) substantially, and the effect by attaching the active vent 22 to the side cloth part 16 (bag body 14) mentioned above can be acquired. it can.

  In the present embodiment, the present invention is applied to the vehicle passenger seat airbag device 10, but the airbag device according to the present invention is not limited to the passenger seat and includes a driver seat and a rear seat. The present invention may be applied to an airbag device installed corresponding to any part.

  Further, in the present embodiment, the vent hole 20 is formed in the side cloth portion 16 constituting the bag body 14, and the active vent 22 is provided in the side cloth portion 16 corresponding to the vent hole 20. However, the formation position of the vent hole 20 in the bag body 14, and the attachment position of the active vent 22 is not limited to the side cloth portion 16, but the vent hole 20 is formed in any part of the bag body 14, and An active vent 22 may be provided corresponding to the hole 20.

It is a perspective view which shows the state which the bag body of the airbag apparatus which concerns on one embodiment of this invention expand | deployed. It is a disassembled perspective view which shows the structure of the internal pressure adjustment means (active vent) applied to the airbag apparatus which concerns on one embodiment of this invention. It is an end view of the bag body and the internal pressure adjusting means (active vent) in which the internal pressure adjusting means (active vent) is expanded in a state where the internal pressure adjusting means (active vent) is retractable. FIG. 4 is an end view corresponding to FIG. 3 in a state in which the internal pressure adjusting means (active vent) is operable in a valve. FIG. 4 is an end view corresponding to FIG. 3, showing a state in which the valve body has moved and the hole has been opened.

Explanation of symbols

10 Airbag device for vehicle passenger seat (airbag device)
14 Bag 20 Vent hole (hole)
22 Active vent (internal pressure adjustment means)
28 Valve body 38 Guide piece (guide means)
52 Coil spring (biasing means)
68 Locking piece (holding means)
70 Holding piece (holding means)

Claims (2)

A bag body that is inflated and deployed by the pressure of the gas supplied to the inside and in which a hole for degassing is formed,
An internal pressure adjusting means for opening the hole by moving the valve body when the internal pressure of the bag body exceeds a certain size, the valve body closing the hole;
In addition,
In the conical shape where the outer peripheral shape becomes smaller toward the one end side and compressed against the urging force, the one located on one end side of the pitch portions adjacent to each other enters the inside located on the other end side An urging means configured by a coil spring, which is elastically deformable in a direction perpendicular to the opening of the hole and urges the valve body in a direction to close the hole;
The coil spring is held in a compressed state against the biasing force of the coil spring in a direction perpendicular to the opening of the hole, and the holding of the coil spring is released when the bag body is inflated and deployed. Holding means;
The airbag apparatus according to claim 1, wherein the internal pressure adjusting means is configured to include The pressure adjusting means is adapted to limit movement of the valve body to guide the valve element toward or away from the direction other than the direction approaching or separating with respect to the hole, and the opening of the hole 2. The guide device according to claim 1, further comprising guide means that can be bent in a direction inclined with respect to the vertical direction, and in the bent state, the dimension along the opening and the vertical direction of the hole is shorter than that before the bending. Airbag device.

Images