JP2018114838A - Airbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag which is not easily pushed to the vehicle outer side by contact with a front airbag while closing a gap with the front airbag.SOLUTION: In an airbag, a sub expansion part 48 which communicates with a main expansion part 47 and is located at a position including a side part of a front airbag 69, which is deployed at the front side of an occupant A, in a deployment state is provided. In the sub expansion part 48, a recessed part 76 is provided at the vehicle inner side and in a position that faces the side part of the front airbag 69 in the deployment state of the sub expansion part 48. The airbag 10, which causes the front airbag 69 to fit in the recessed part 76 to close a gap with the front airbag 69 without increasing an expansion thickness of the sub expansion part 48 in a vehicle width direction and be prevented from being easily pushed to the vehicle outer side by contact with the front airbag 69, can be provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an airbag including an airbag main body that is supplied with gas from a folded state, expands along a predetermined surface on the side of a vehicle compartment, and expands in the vehicle width direction.

  2. Description of the Related Art Conventionally, an airbag apparatus having an airbag that is inflated and deployed by introducing gas, is a longitudinal airbag longitudinally back and forth along a predetermined surface including a pillar portion of a side of a vehicle compartment and a window portion of a door. A so-called curtain airbag device is known. The airbag of such an airbag device is normally folded long and is arranged along the roof side portion of the upper edge portion of the window portion. When an impact such as a side collision or rollover occurs, gas is supplied from the inflator and the airbag is inflated and deployed downward along the side window glass to restrain the occupant. Protect your head.

  In recent years, in addition to a frontal collision, airbags are required to have occupant restraint performance in an oblique collision (oblique collision) in which a part of the vehicle collides with an obstacle from an oblique direction. Therefore, for example, the other end portion of the tether having one end portion attached to the front pillar (A pillar) is connected to the side portion on the front end side of the inflating portion of the curtain airbag, and the length between the both end portions of the tether is determined by the curtain air. By setting it to be shorter than the length of the inflatable part provided on the front end side of the bag, the inflated part is bent into the passenger compartment at the front side part of the occupant in the deployed state, thereby The structure which fills the clearance gap with the side part of the front airbag which expand | deploys is known (for example, refer patent document 1).

  However, in the case of this configuration, there is a concern that the curtain airbag is pushed toward the outside of the vehicle due to the contact between the front airbag and the inflated portion bent toward the front airbag.

  In addition, for example, a sub-inflation part is provided adjacent to the front end of the main inflating part of the curtain airbag vertically, and the upper sub-inflation part is deployed in a bent shape so as to overlap the inner side of the lower sub-inflation part. A configuration is known in which the head of an occupant who has moved obliquely forward at the time of an oblique collision is prevented from coming into contact with the front pillar or the instrument panel by being turned forward in the rear side of the front airbag. (For example, refer to Patent Document 2).

  In the case of this configuration, the configuration is complicated, and there is a concern that the curtain airbag is pushed outwardly by the contact between the front airbag and the upper sub-inflation portion bent toward the front airbag. Is done. In addition, for example, when the head of an occupant contacts the main inflating portion at an oblique collision, the head side surface moves to the front while contacting the main inflating portion, so that the head rotates toward the curtain airbag side. It is restrained by the secondary expansion part. For this reason, it is desirable to be able to restrain by the sub expansion part in the state which suppressed rotation of such a head. Further, considering that the head of the occupant contacts the main inflating portion, it is desirable to sufficiently take the thickness of the main inflating portion in the deployed state to suppress bottoming of the main inflating portion.

JP, 2006-124498, A (the 7th page, Drawing 1-Drawing 5) JP, 2014-151676, A (page 3-4, FIGS. 1-3)

  As described above, in order to effectively restrain the occupant moving forward in the case of an oblique collision, the curtain airbag is brought into contact with the front airbag while closing the gap with the front airbag by the curtain airbag. It is desired to make it difficult to be pushed to the outside of the vehicle.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an airbag that is less likely to be pushed to the outside of the vehicle by being in contact with the front airbag while closing a gap with the front airbag. .

  The airbag according to claim 1 is formed in a bag shape, and is supplied with gas from a folded state. The airbag main body expands along a predetermined surface on the side of the passenger compartment and expands in the vehicle width direction. The airbag main body portion includes a main inflating portion disposed on a side of the occupant in a deployed state, and a front air that communicates with the main inflating portion and is deployed in front of the occupant. A sub-inflation portion disposed in a deployed state at a position including a side portion of the bag, and the sub-inflation portion has a recess at a position facing the side portion of the front airbag in the deployed state.

  According to a second aspect of the present invention, in the airbag according to the first aspect, the sub-inflation portion has a bent portion that protrudes toward the vehicle outer side and forms a recess on the vehicle inner side.

  The airbag according to claim 3 is the airbag according to claim 2, wherein at least the vehicle exterior base fabric constituting the vehicle exterior side of the sub-inflation portion and the vehicle interior base fabric constituting the vehicle interior side of at least the sub-inflation portion. And a plurality of upper and lower parts connecting the vehicle outer side base fabric and the vehicle inner side base fabric by connecting the vehicle outer side base fabric and one end to each other, and connecting the vehicle outer side base fabric and the vehicle inner side base fabric. The distance between the one end of the upper connecting body and the one end of the lower connecting body is such that the other end of the upper connecting body and the other end of the lower connecting body. It is larger than the interval with the part.

  According to a fourth aspect of the present invention, in the airbag according to the third aspect of the present invention, the length of one end of each connector is longer than the length of the other end.

  According to the airbag according to claim 1, the airbag is in a deployed state at a position including the side portion of the front airbag that is communicated with the main inflating portion disposed on the side of the occupant in the deployed state and deployed in front of the occupant. In the vehicle width direction of the sub-inflation part, the front airbag is fitted in the recess by providing a recess in the side part of the front airbag in the deployed state of the sub-inflation part. Without increasing the expansion thickness of the vehicle, it is possible to make it difficult to be pushed to the outside of the vehicle by contacting the front airbag while closing the gap with the front airbag.

  According to the airbag of the second aspect, in addition to the effect of the airbag of the first aspect, by forming a concave portion on the vehicle inner side by projecting the bent portion provided on the auxiliary inflating portion to the vehicle outer side, By bending the bent portion, the concave portion can be easily formed on the inner side of the sub-inflatable portion, and the bent portion is brought into contact with a predetermined surface to firmly support the concave portion from the outer side of the vehicle, and the clearance between the front airbag and the concave portion is more reliably secured. Can be blocked.

  According to the airbag according to claim 3, in addition to the effect of the airbag according to claim 2, the one end connected to the vehicle exterior base fabric of the upper coupling body and the vehicle exterior base fabric of the lower coupling body The distance between the other end connected to the vehicle interior base fabric of the lower connecting body and the space between the other end connected to the vehicle inner base fabric of the lower connected body By increasing the size, a bent portion that is bent so that the side portion of the front airbag is fitted to the auxiliary inflation portion at the position of each tether can be easily formed. Therefore, the sub-inflation portion and the side portion of the front airbag are less likely to come into contact with each other, and the airbag main body portion can be more reliably suppressed from being pushed outward by the front airbag.

  According to the airbag of the fourth aspect, in addition to the effect of the airbag of the third aspect, the length of one end portion connected to the vehicle outer side base fabric of the coupling body is connected to the vehicle inner side base fabric. By making it longer than the length of the end portion, the front part of the bent part can be inflated thickly in the vehicle width direction in the secondary inflating part. And it can restrain more reliably, without letting the clearance gap between an airbag main-body part and a front airbag slip, and without making a subinflation part bottom.

(A) is the front view which shows typically the deployment state of the airbag of the 1st Embodiment of this invention from the front, (b) is a top view which shows typically the deployment state of an airbag same as the above from the top. . It is a side view which shows a part of deployment state of an airbag same as the above from the compartment side. It is sectional drawing which shows the non-deployment state of the airbag in the II equivalent position of FIG. It is a top view which shows typically the deployment state of the airbag of the 2nd Embodiment of this invention from upper direction. It is a side view which shows a part of deployment state of an airbag same as the above from the compartment side.

  The configuration of the first embodiment of the present invention will be described below with reference to the drawings.

  In FIG. 1 to FIG. 3, reference numeral 10 denotes an airbag, and the airbag apparatus provided with the airbag 10 is also called a curtain airbag apparatus, and is a roof side as a storage position of a compartment 14 of a vehicle body of a vehicle as a vehicle. Arranged in part 15. The airbag 10 is also called a curtain airbag, a side-impact airbag, an inflatable curtain, or a head protection airbag. The airbag 10 is subjected to a side impact or rollover. For example, it is developed in a downward direction in a predetermined direction on the side of an occupant as a protected object to protect the occupant's head and the like.

  In the following description, the front-rear direction, the vehicle width direction, the both-side direction, the up-down direction, and the like are based on the straight direction of the vehicle, and the front direction (arrow F direction), rear direction (arrow R direction), and upward (arrow U direction), the lower side (arrow D direction), the outside of the vehicle compartment 14 (arrow W direction), the inside of the vehicle compartment 14 (arrow C direction), and the like will be described.

  The vehicle body includes a front seat and a rear seat, which are not shown in the figure, in which a passenger can sit in the passenger compartment 14, and the front seat and the rear seat respectively correspond to the front seat and the rear seat. A door 20 having a covered window part (side window) 18 and a door trim 19 as an interior part is provided at the lower part. Further, on both sides of the passenger compartment 14, in order from the front side, a front pillar 21 as a (first) columnar body called a A pillar, a center pillar 22 as a (second) columnar body also called a B pillar, and a C pillar A rear pillar (not shown) as a (third) columnar body, also referred to as a third pillar, is provided, a front window 18 is located behind the front pillar 21 and in front of the center pillar 22, and behind the center pillar 22 and the rear pillar. A rear window portion 18 is located in front of the. The window 18, the door trim 19, the door 20, the front pillar 21, the center pillar 22, and the rear pillar form a predetermined surface 24 on which the airbag 10 is deployed on both sides of the vehicle compartment 14. Further, a vehicle body panel 25 constituting a member to be attached, which is also called a roof side rail, is provided on the upper side of the front pillar 21, the center pillar 22, and the rear pillar, that is, the upper edge that is one edge of the windows 18 and 18. The ceiling panel as a ceiling portion is supported through the vehicle body panel 25. A front glass (front windshield) is provided on the front side of the front pillars 21 on both sides, and a rear glass is provided on the rear side of the rear pillars on both sides. The roof side portion 15 as a storage position is set from the edge portion on both sides of the ceiling panel to the portion covering the entire length of the front pillar 21 and the rear pillar extending in a direction intersecting with the edge portion. The predetermined surface 24 is set inside the arc virtually formed by the edge portion of the ceiling panel, the front pillar 21 and the rear pillar.

  Here, the center pillar 22 indicates not a pillar portion at the front and rear ends but a pillar portion covered with the deployed airbag 10. Depending on the type of vehicle, for example, four or more pillar portions may be provided on one side, but the third and subsequent pillar portions from the front will be described as rear pillars.

  The airbag device is a so-called front / rear seat airbag that can protect front and rear passengers, and is an interior that continues from the upper end of the vehicle body panel 25, the front pillar 21, the center pillar 22, and the rear pillar to the ceiling. The roof side part 15 surrounded by the head lining which is a ceiling covering member as a material, that is, the airbag 10 which is folded and stored along the upper edge of the door opening of the vehicle body, and behind or above the rear seat An inflator (not shown) that is a gas generator that is housed and supplies gas to the airbag 10 is provided. In addition, this airbag device is a breakable cylindrical or string-like shape that holds the shape of the folded airbag 10 and a bracket (not shown) formed by pressing a metal plate that attaches the airbag 10 to the vehicle body panel. A sleeve or the like as a shape holding member is provided. Further, the interior side of each of the compartments 14 of the front pillar 21, the center pillar 22, and the rear pillar is covered with a cover garnish as a structure, that is, a covering interior material.

  The airbag 10 includes a gas introduction portion as an inflator connection portion into which an inflator is inserted and connected to introduce gas, an airbag body portion 33 formed in a flat bag shape, and an attachment provided in the airbag body portion 33 A portion 34 and a tether portion 35 provided in the airbag main body portion 33. The airbag 10 has an upper edge portion attached to the vehicle body side via the attachment portion 34 and, for example, a front end portion attached to the vehicle body side (front pillar 21) by the tether portion 35 and being folded in an elongated shape. The roof side portion 15 above the center pillar 22 is housed in a longitudinal shape along the front-rear direction.

  The airbag 10 is structurally constituted by one or a plurality of base fabrics. In the present embodiment, the airbag 10 includes a vehicle outer side base fabric 41, a vehicle inner side base fabric 42, and a tether 43 as a connection body that is a connection base fabric. The vehicle outer side base fabric 41 and the vehicle inner side base fabric 42 may be integrated or separated. Then, the vehicle exterior base fabric 41 and the vehicle interior base fabric 42 are joined to each other by the joint portion 45, and the main inflation portion 47 and the secondary inflation that protect the occupant A seated in the front seat are provided on the front side of the airbag main body portion 33. 48, and an inflatable portion (not shown) for protecting the occupant seated in the rear seat is formed on the rear side of the airbag body portion 33. In the present embodiment, the airbag 10 is described as being disposed on the side of the driver's seat of a left-hand drive (LHD) specification vehicle. However, for example, the airbag 10 may be disposed on the side of the passenger seat. In the case where the vehicle is disposed on the side of the driver's seat of a right-hand drive specification vehicle, it can be handled by reversing the left and right sides.

  The gas introduction part projects from the upper part of the airbag body part 33. The rear end portion (upper end portion) of the gas introduction portion is an insertion opening into which the inflator is inserted. The gas introduction part may be disposed at the center part in the front-rear direction of the airbag main body 33 or may be disposed at the rear part of the airbag main body 33.

  The airbag main body portion 33 is formed in a longitudinal shape, and is stored in the vehicle body in a state where the longitudinal direction is along the front-rear direction.

  A plurality of attachment portions 34 are provided on the upper edge portion of the airbag body portion 33, and are disposed apart from each other in the front-rear direction.

  The tether portion 35 protrudes from one end portion of the airbag body portion 33 in the longitudinal direction. In the present embodiment, the tether portion 35 is located at the front end portion of the airbag main body portion 33.

  The vehicle outer side base fabric 41 and the vehicle inner side base fabric 42 form a gas introduction part, an airbag main body part 33 (a main inflating part 47, a sub inflating part 48 and an inflating part), an attachment part 34 and a tether part 35, respectively. is there. The vehicle exterior base fabric 41 and the vehicle interior base fabric 42 are formed in substantially the same longitudinal shape.

  The joint portion 45 joins the vehicle outer side base fabric 41 and the vehicle inner side base fabric 42 by, for example, sewing or an adhesive. The joint portion 45 includes an outer edge joint portion 50 that joins the outer edge portions of the vehicle outer side base fabric 41 and the vehicle inner side base fabric 42 to each other. The joint portion 45 includes an inner joint portion 51 that partitions the main inflating portion 47, the sub inflating portion 48, the inflating portion, and the like.

  The inner joint portion 51 is a joint portion that protrudes upward or downward continuously from the outer edge joint portion 50. In the present embodiment, the inner joint portion 51 is provided with a first joint portion 53, a second joint portion 54, and a third joint portion 55. The inner joint portions 51 are each formed in a linear shape, and a protective portion 51a in which the base fabric is joined in a circular shape is formed at the tip portion. By providing such a protective portion 51a, it is possible to ensure the elongation of the base fabric during inflation and deployment and prevent wrinkles, and the stress generated at the end of the inner joint portion 51 when the airbag body 33 is inflated and deployed. A sufficient strength against concentration can be obtained.

  The first joining portion 53 defines a rear portion of the main inflating portion 47 and a front portion of the inflating portion. The first joint portion 53 is located on the side of the headrest of the front seat and overlaps with the center pillar 22 in the deployed state of the airbag 10 (airbag main body portion 33). The first joint portion 53 has a lower end portion of the airbag main body portion 33 (outer edge joint portion 50) as a base end portion, and is inclined rearward and upward from the base end portion toward the front end side. Along the front-rear direction at a position spaced downward with respect to the upper edge of the bag body 33 (outer edge joint 50), that is, substantially with respect to the upper edge of the airbag body 33 (outer edge joint 50). It is formed in a bent shape that is folded back so as to extend in parallel. The gas supplied from the inflator into the airbag main body 33 is supplied to the main inflating portion 47 between the upper end portion (tip portion) of the first joint portion 53 and the outer edge joint portion 50 located at the upper portion. It is an inflow path 57 that flows in.

  The second joint portion 54 partitions the front portion of the main expansion portion 47 and the rear portion of the sub expansion portion 48. The second joint portion 54 is positioned in front of the headrest of the front seat, that is, in front of the occupant A seated in the front seat, in the deployed state of the airbag 10 (airbag main body portion 33), and The rear pillar 21 is located behind the front pillar 21. The second joint portion 54 has a bent portion that has an upper end portion of the airbag body portion 33 (outer edge joint portion 50) as a base end portion and is inclined rearward and downward from the base end portion toward the front end side. Are formed in a straight line, and the distal end portion is located below the upper end portion of the first joint portion 53 and is located away from the upper end portion of the third joint portion 55. ing. Further, the second joint portion 54 is formed shorter than the first joint portion 53.

  The third joint 55 partitions the front part of the main expansion part 47 and the rear part of the sub expansion part 48. The third joint portion 55 is positioned in front of the headrest of the front seat, that is, in front of the occupant A seated in the front seat, in the deployed state of the airbag 10 (airbag main body portion 33), and The rear pillar 21 is located behind the front pillar 21. The third joint portion 55 has a bent portion that has a lower end portion of the airbag main body portion 33 (outer edge joint portion 50) as a base end portion and is inclined forward and upward from the base end portion toward the front end side. And the tip is positioned below the upper end of the first joint 53 and is spaced apart from the lower end of the second joint 54. ing. Therefore, a communication port 59 for communicating the main expansion portion 47 and the sub expansion portion 48 is formed between the second joint portion 54 and the third joint portion 55. Further, the third joint portion 55 is formed shorter than the first and second joint portions 53 and 54.

  The tether 43 connects the vehicle outer base fabric 41 and the vehicle inner base fabric 42 to each other at the position of the sub-inflating portion 48. The tether 43 is formed of one or more base fabrics. A plurality of tethers 43 are set up and down. Specifically, in the present embodiment, the tether 43 includes an upper tether 43a that is an upper connection body as a first connection body located on the upper side, and a lower connection as a second connection body that is located on the lower side. The lower tether 43b which is the body is set. That is, the tethers 43 are arranged in a pair in the vertical direction. One end 61 of the tether 43 is connected to the vehicle outer base fabric 41, and the other end 62 is connected to the vehicle inner base fabric 42. One end 61 and the other end 62, which are both long sides of the tether 43, are fixed to the vehicle outer base fabric 41 and the vehicle inner base fabric 42, for example, with a silicone adhesive.

  The upper tether 43a is formed in, for example, a rectangular shape, and is arranged in a state in which the longitudinal direction is aligned in the front-rear direction, that is, the longitudinal direction of the airbag main body 33 coincides with the longitudinal direction. The upper tether 43a is positioned above the central portion in the up-down direction, which is the deployment direction of the airbag main body 33. In the present embodiment, the upper tether 43a is positioned above the lower end that is the tip of the second joint 54. Therefore, the upper tether 43a is located above the communication port 59. Further, in the present embodiment, the upper tether 43a is positioned, for example, closer to the rear side in the front-rear direction of the sub-expansion portion 48, that is, close to the second and third joint portions 54 and 55. The upper tether 43a is inclined so that the one end 61a is positioned above the other end 62a. That is, the upper tether 43a is disposed so as to incline upward from the vehicle compartment 14 side toward the vehicle outer side in a deployed state of the airbag 10 (airbag main body portion 33).

  The lower tether 43b is formed, for example, in a rectangular shape, and is arranged in a state where the longitudinal direction is aligned in the front-rear direction, that is, the longitudinal direction of the airbag body 33 coincides with the longitudinal direction. Therefore, the lower tether 43b is disposed substantially parallel to the upper tether 43a. The lower tether 43b is located below the central portion in the up-down direction, which is the deployment direction of the airbag main body portion 33. In the present embodiment, the lower tether 43b is located below the upper end that is the tip of the third joint 55. Therefore, the lower tether 43b is located below the communication port 59. The lower tether 43b is disposed below (directly below) the upper tether 43a. Further, in the present embodiment, the lower tether 43b is located, for example, closer to the rear side in the front-rear direction of the sub-expansion portion 48, that is, close to the second and third joint portions 54 and 55. The lower tether 43b is inclined so that the one end 61b is positioned below the other end 62b. That is, the lower tether 43b is disposed so as to incline downward from the vehicle compartment 14 side toward the vehicle outer side in a deployed state of the airbag 10 (airbag main body portion 33). Therefore, the distance between the one end 61a of the upper tether 43a and the one end 61b of the lower tether 43b is set larger than the distance between the other end 62a of the upper tether 43a and the other end 62b of the lower tether 43b. (FIG. 3). In other words, the upper tether 43a and the lower tether 43b are arranged so as to gradually move up and down from the vehicle compartment 14 side toward the vehicle outer side in the deployed state of the airbag 10 (airbag main body portion 33). .

  The main inflating portion 47 restrains the head of the occupant A seated in the front seat by the development of the airbag 10 (airbag main body portion 33). The main inflating portion 47 is a steering wheel that is a handle as a portion to be installed that is located in front of the center pillar 22 and in front of the occupant A on the predetermined surface 24 in the deployed state of the airbag 10 (airbag main body portion 33). It is arranged in a range extending behind 65. The main inflating portion 47 is partitioned on the rear side by the first joint portion 53, on the upper and lower sides on the front side by the second and third joint portions 54 and 55, and on the upper and lower sides by the outer edge joint portion 50. The main inflating portion 47 restrains the head of the occupant A by the main restraining surface 67 surrounded by the first joining portion 53, the second joining portion 54, the third joining portion 55, and the outer edge joining portion 50. It is like that. In addition, the main inflating portion 47 has an upper rear side communicated with the gas introducing portion via the inflow passage 57 and directly communicated with the auxiliary inflating portion 48 via the communication port 59. Further, in the present embodiment, the main inflating portion 47 has a shape in which the width on the upper side (dimension in the front-rear direction) is larger than the lower side. That is, the main expansion portion 47 is partitioned into a substantially trapezoidal shape that expands in the front-rear direction from the lower side to the upper side.

  The sub-inflation part 48 restrains the head of the occupant A at the time of an oblique collision, for example, by deploying the airbag 10 (airbag body part 33). The sub-inflation part 48 is installed in the steering wheel 65 from the rear side of the steering wheel 65 on the predetermined surface 24 in the deployed state of the airbag 10 (airbag main body part 33), and is deployed in front of the occupant A. It is arranged over a position including the side portion of the bag 69, for example, a position close to the rear portion of the front pillar 21. The sub-expansion portion 48 communicates with the main expansion portion 47. That is, the sub-inflation portion 48 is located downstream of the main inflation portion 47 in the gas flow supplied from the inflator to the airbag main body portion 33. In other words, the sub-expansion part 48 is configured such that gas flows from the communication port 59 via the main expansion part 47. The rear side of the sub-inflatable portion 48 is defined by the second and third joint portions 54 and 55, and the top and bottom and the front portion are defined by the outer edge joint portion 50. The sub-inflatable portion 48 restrains the head of the occupant A by the sub-constraint surface 71 surrounded by the second joint portion 54, the third joint portion 55, and the outer edge joint portion 50. The sub-expansion part 48 is set to have a larger vertical dimension than the main expansion part 47. That is, the secondary restraint surface 71 is set larger than the main restraint surface 67. In the present embodiment, the sub-expansion portion 48 is arranged at a position where the upper end portion is substantially equal to the upper end portion of the main expansion portion 47, and the lower end portion projects downward from the lower end portion of the main expansion portion 47. Therefore, the secondary restraint surface 71 is positioned so as to extend below the main restraint surface 67. For this reason, the sub-inflating portion 48 (sub-restraining surface 71) extends below the lower portion of the steering wheel 65. Further, in the present embodiment, the sub-expansion portion 48 has a shape in which the lower width (front-rear direction dimension) is larger than the upper side. That is, the sub-expansion portion 48 is partitioned into a substantially trapezoidal shape that expands in the front-rear direction from the upper side to the lower side. The sub-inflation portion 48 is formed with a bent portion 73 at a position facing the side portion of the front airbag 69 in a deployed state of the airbag 10 (airbag main body portion 33). A front sub-inflatable portion 74 is formed in front of the front side.

  The bent portion 73 has a sub-inflation when the outer fabric 41 and the inner fabric 42 are pulled in the vehicle width direction by the tether 43 (tether 43a, 43b) when the airbag 10 (airbag body 33) is deployed. This is a portion formed in the secondary expansion portion 48 by restricting the expansion of the portion 48 in the vehicle width direction. Therefore, the bent portion 73 is formed at the position of the tether 43 (tethers 43a and 43b). The bent portion 73 suppresses the contact pressure between the side portion of the front airbag 69 and the sub-inflation portion 48 (the airbag 10 (the airbag body portion 33)) in the deployed state. The bent portion 73 is arranged in an inclined shape so that the upper tether 43a and the lower tether 43b are gradually separated from each other toward the outside of the vehicle, whereby the airbag 10 (the airbag main body portion 33) is deployed. In this state, it protrudes to the outside of the vehicle (imaginary line in FIG. 3) and is bent so as to have a recess 76 on the vehicle compartment 14 side (sub-restraint surface 71). That is, the bent portion 73 is bent in a reverse shape when viewed from the front in the present embodiment. The bent portion 73 is bent along the side of the front airbag 69 on the vehicle body side (the side opposite to the passenger seat). That is, the bent portion 73 is bent along the shape of the front airbag 69. Therefore, the bent portion 73 is interposed between the front airbag 69 and the predetermined surface 24 (door 20) in the deployed state of the airbag 10 (airbag main body portion 33). Further, the bent portion 73 is disposed from the upper side to the lower side of the center portion in the vertical direction of the steering wheel 65 (front airbag 69).

  The front side sub-inflation part 74 is a part formed in the sub-inflation part 48 in front of the bent part 73 without being pulled by the tether 43 (tethers 43a and 43b) when the airbag 10 (airbag body part 33) is deployed. It is. For this reason, the front side secondary expansion portion 74 is formed so as to expand in the vehicle width direction relative to the bent portion 73. Further, the front side sub-inflation part 74 is located in front of the steering wheel 65 (on the rear side) when the airbag 10 (airbag body part 33) is deployed, and the front side part of the steering wheel 65 and a predetermined surface. 24 (the door 20 and the front pillar 21).

  The steering wheel 65 is mounted on a steering shaft that is a steering shaft as a steering device (not shown) provided in a state inclined with respect to the horizontal direction (vertical direction), for example, and is rotatable.

  The front airbag 69 includes a gas introduction portion as an inflator connection portion into which an inflator (not shown) is inserted and connected to introduce gas, and a front airbag body portion 78 formed in a bag shape such as a circle. The front airbag 69 is stored, for example, in a folded state at the center of the steering wheel 65, protrudes from the steering wheel 65 by the gas supplied from the inflator at the time of a collision, and is inflated and deployed in front of the occupant A. The upper body including the head of A is restrained.

  When the airbag 10 is manufactured, the vehicle outer base fabric 41 and the vehicle inner base fabric 42 are connected by the tether 43 (tethers 43a and 43b), and the outer edge joint portion 50 and the inner joint portion 51 (first to fifth joints). The airbag 10 having the main inflating portion 47, the sub inflating portion 48, the air bag main body portion 33 including the inflating portion, and the like is completed by joining the third joining portions 53 to 55) by sewing or the like. In this state, the gas injection side of the inflator is inserted into the insertion opening of the gas introduction portion, and this inflator is integrally fixed as being exposed to the outside from the airbag 10.

  Further, the airbag body 33 can be rolled up while being folded into a roll shape, etc., and the airbag 10 can be folded into a predetermined elongated shape, and can be released or broken by the pressure when the airbag 10 is deployed using a sleeve (not shown). Hold the folded shape so that In this manner, the airbag 10 is folded into an elongated shape and the folded shape is maintained, and an airbag device serving as a curtain airbag module is configured.

  Then, an airbag device including the airbag 10 folded as described above is brought into the vehicle compartment 14, and the attachment work to the vehicle body is performed before the interior materials such as the head lining and the pillar garnish are attached. This attachment operation is performed by attaching and fixing the plurality of attachment portions 34 and the tether portion 35 of the airbag 10 to the vehicle body using a fastener such as a bolt (not shown). The inflator is fixed at a position corresponding to, for example, above the center pillar 22 or a position corresponding to above the rear pillar. Further, the harness derived from the inflator is connected to a control device provided in the vehicle body. Next, the headlining is attached to the ceiling panel of the vehicle body to cover the airbag device, and the pillar garnish is attached to the front pillar 21, the center pillar 22, and the rear pillar, respectively, and the operation of attaching the airbag device to the vehicle body is completed. In this attached state, the airbag device is isolated from the interior of the passenger compartment 14 by the headlining and the pillar garnish, and the inflator inserted into the gas introduction portion and the airbag 10 folded into a roll shape are connected to the pillar garnish. Held in the upper position.

  In the case of a side collision including a minute lap collision or an oblique collision (collision from diagonally forward) or a rollover of the vehicle, each inflator is actuated by the control device, and the gas injected from these inflators is a forward airbag 69. The front airbag main body 78 and the airbag main body 33 of the airbag 10 are introduced to the front airbag main body 78, and the front airbag main body 78 is inflated and deployed rearward. The front airbag 69 (front airbag main body portion 78) is inflated and deployed in a plane along the predetermined surface 24 to protect the occupant A.

  More specifically, in the airbag 10, when gas is supplied from the gas introduction part, the gas introduced from the gas introduction part is supplied to the expansion part and supplied from the inflow path 57 to the main expansion part 47. Is done. Therefore, the airbag main body 33 is deformed so that the inflating portion and the main inflating portion 47 are deployed while being inflated to push the lower end portion of the head lining toward the interior side of the passenger compartment 14, and from the upper end portion of the pillar garnish. It protrudes into the passenger compartment 14 and expands downward along the predetermined surface 24. Gas is supplied to the sub-expansion part 48 from the communication port 59 via the main expansion part 47, and this sub-expansion part 48 is also delayed from the main expansion part 47, that is, following the main expansion part 47, Expands while expanding.

  At this time, in the main inflating portion 47, the side of the head of the occupant A (occupant) by the first joint portion 53, the second joint portion 54 and the third joint portion 55 of the outer edge joint portion 50 and the inner joint portion 51. A main constraining surface 67 is formed between the head of A and the predetermined surface 24). Further, in the secondary inflating portion 48, the secondary joining portion 54 and the third joining portion 55 of the outer edge joint portion 50 and the inner joint portion 51 are placed in front of the main restraint surface 67 on the side of the occupant A's head. The restraint surface 71 is formed, and the tether 43 (tethers 43a and 43b) regulates the distance between the vehicle outer base fabric 41 and the vehicle inner base fabric 42, and is recessed in the sub-restraint surface 71 at the position of the tether 43. A bent portion 73 having 76 is formed, and a front sub-inflatable portion 74 is formed in front of the bent portion 73. For this reason, the side portion of the front airbag 69 (front airbag main body portion 78) is fitted into the concave portion 76 of the bent portion 73, and the airbag 10 (airbag main body portion 33) strongly interferes with the front airbag 69. Therefore, the airbag 10 (airbag body portion 33) does not reduce the expansion thickness (stroke) in the vehicle width direction of the sub-inflation portion 48 of the airbag 10 (airbag body portion 33). However, the gap between the front airbag 69 and the predetermined surface 24 (door 20) can be filled without being pushed out by the front airbag 69 (front airbag main body 78) (FIG. 1A). Further, the front side secondary inflating portion 74 is inflated more in the vehicle width direction than the bent portion 73 on the back side of the front airbag 69 (front airbag main body portion 78) in front of the steering wheel 65 (FIG. 1B). ).

  As a result, as shown in the locus T1 shown in FIGS. 1A and 2, the head of the occupant A moving toward the door trim 19 downward toward the front front side of the vehicle due to the oblique collision is the airbag 10 (airbag body portion). 33) and the front airbag 69 (front airbag main body 78) without passing through the gap and without rotating the head in the left-right direction, the airbag 10 (airbag main body 33) or the front airbag It is restrained by the bag 69 (front airbag main body 78), and interference with the door 20 (door trim 19) is prevented.

  Similarly, the airbag 10 (the airbag main body 33) and the front airbag are also applied to the head of the occupant A that moves toward the front pillar 21 by the oblique collision toward the front pillar 21 as shown by a trajectory T2 shown in FIG. The airbag 10 (the airbag body 33) or the front airbag 69 (the front airbag) without passing through the gap with the bag 69 (the front airbag body 78) and without rotating the head in the left-right direction. It is restrained by the bag main body 78), and interference with the front pillar 21 is prevented.

  At the time of a frontal collision, the occupant A is restrained by the front airbag 69 (the front airbag body 78).

  In this way, the side portion of the front airbag 69 (front airbag main body portion 78) that communicates with the main inflatable portion 47 disposed on the side of the occupant A in the deployed state and that is deployed in front of the occupant A is provided. A sub-inflation portion 48 that is disposed in a deployed state is provided at a position including the concave portion 76 provided at a position facing a side portion of the front airbag 69 (front airbag main body portion 78) in the deployed state of the sub-inflation portion 48. Thus, the side portion of the front airbag 69 (front airbag main body portion 78) is fitted into the recess 76, and the airbag 10 (airbag is not increased) without increasing the inflated thickness of the auxiliary inflatable portion 48 in the vehicle width direction. The main body portion 33) can be made difficult to be pushed to the outside of the vehicle by contacting the front airbag 69 while closing the gap with the front airbag 69 (front airbag main body portion 78).

  Accordingly, as in the case where the inflation thickness in the vehicle width direction of the airbag 10 (airbag body portion 33) is increased in order to fill a gap with the front airbag 69 (front airbag body portion 78), the front airbag 69 The airbag 10 (airbag body 33) is pushed to the outside of the vehicle due to strong interference with the (front airbag body 78), and the head of the occupant A cannot be restrained near the lower side from the center of the steering wheel 65. The head of the occupant A can be reliably restrained without causing a situation such as disappearance.

  In addition, by forming the concave portion 76 on the vehicle inner side by projecting the bent portion 73 provided on the sub-inflatable portion 48 to the vehicle outer side, the concave portion 76 can be easily formed on the vehicle inner side of the sub-inflatable portion 48 by the bending of the bent portion 73. While being able to form, the bending part 73 is made to contact the predetermined surface 24, the recessed part 76 is firmly supported from the vehicle outer side, and the clearance gap between a front airbag (front airbag main-body part 78) and the recessed part 76 can be obstruct | occluded more reliably.

  Further, as in the case where the expansion thickness in the vehicle width direction of the airbag 10 (airbag body portion 33) is suppressed so as not to be pushed outward by the front airbag 69 (front airbag body portion 78), the occupant A An area for receiving the head of the occupant A is not reduced, and contact of the head of the occupant A with the door trim 19 or the like can be suppressed.

  Further, structurally, since it is only necessary to add the tether 43 partially to the conventional airbag body 33, the configuration size can be prevented and the packaging size can be reduced.

  The distance between the one end portion 61a connected to the vehicle outer side base fabric 41 of the upper tether 43a and the one end portion 61b connected to the vehicle outer side base fabric 41 of the lower tether 43b is set as the vehicle inner side base fabric 42 of the upper tether 43a. Is larger than the distance between the other end portion 62b connected to the vehicle interior base cloth 42 of the lower tether 43b and the sub-expansion portion 48 at the positions of the tethers 43a and 43b. The bent portion 73 (concave portion 76) that is bent so that the side portion of the front airbag 69 (front airbag main body portion 78) is fitted can be easily formed. Therefore, the sub-inflation part 48 of the airbag 10 (airbag body part 33) and the side part of the front airbag 69 become more difficult to contact, and the airbag 10 (airbag body part 33) becomes the front airbag 69 (front). It can be more reliably suppressed that the airbag body 78) is pushed to the outside of the vehicle.

  In short, in the present embodiment, by forming the bent portion 73 in the sub-inflation portion 48, the front airbag 69 (the front airbag body portion) can be formed without increasing or decreasing the inflation thickness of the sub-inflation portion 48 in the vehicle width direction. 78), the configuration in which the airbag 10 (airbag body portion 33) is not pushed out of the vehicle by the front airbag 69 (front airbag body portion 78) can be easily realized.

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, the lengths of the one end 61 and the other end 62 of the tether 43 of the first embodiment are different.

  Specifically, the tether 43 (tether 43a, 43b) is formed in a trapezoidal shape in which the length of one end 61 (one end 61a, 61b) is longer than the length of the other end 62 (other end 62a, 62b). Has been. Further, the front end side of the one end 61 (one end 61a, 61b) of the tether 43 (tether 43a, 43b) is arranged to extend forward from the front end side of the other end 62 (other end 62a, 62b). ing. For this reason, compared with the case where the tether 43 is rectangular, the volume of the front side secondary expansion part 74 is set larger, and the front side secondary expansion part 74 is expanded more in the vehicle width direction.

  In the case of a side collision or rollover including a minute lap collision or oblique collision (collision from diagonally forward) of the vehicle, the airbag 10 supplies gas introduced from the inflator through the gas supply section to the expansion section. At the same time, by being supplied from the inflow path 57 to the main inflating portion 47, it develops downward along the predetermined surface 24. Gas is supplied to the sub-expansion part 48 from the communication port 59 via the main expansion part 47, and this sub-expansion part 48 is also delayed from the main expansion part 47, that is, following the main expansion part 47, Expands while expanding.

  At this time, in the secondary inflating portion 48, the second joint portion 54 and the third joint portion 55 of the outer edge joint portion 50 and the inner joint portion 51 are located in front of the main restraint surface 67 on the side of the head of the occupant A. The secondary restraint surface 71 is formed, and the tether 43 (tethers 43a and 43b) regulates the distance between the vehicle outer base fabric 41 and the vehicle inner base fabric 42. A bent portion 73 having a recess 76 is formed, and a front sub-inflatable portion 74 is formed in front of the bent portion 73.

  At this time, in the present embodiment, the length of one end 61 (one end 61a, 61b) connected to the vehicle outer side base fabric 41 of the tether 43 (tether 43a, 43b) is connected to the vehicle inner side base fabric 42. By making it longer than the length of the other end portion 62 (the other end portions 62a and 62b), the front side secondary expansion portion 74, which is the front portion of the bent portion 73, is expanded thickly in the vehicle width direction in the secondary expansion portion 48. Can do. For this reason, for example, the head of the occupant A that moves to the outer front side of the vehicle at the time of an oblique collision passes through the gap between the airbag 10 (the airbag main body portion 33) and the front airbag 69 (the front airbag main body portion 78). Without restraining the bottom of the sub-inflatable portion 48, it can be restrained more reliably.

  In each of the above embodiments, the airbag 10 is a curtain airbag that is deployed downward from the roof side portion along the predetermined surface 24.For example, the airbag 10 is deployed upward from the upper portion of the door. It can also be used as a so-called door mount airbag.

  Further, although the airbag 10 is deployed to the side of the driver seat, it may be deployed to the side of the passenger seat.

  Furthermore, the front airbag 69 is not limited to a front seat airbag such as a driver seat or a passenger seat, but may be an airbag that is deployed in front of the rear seat. In this case, the sub-inflatable portion is configured to be positioned in front of the occupant who has arrived at the rear seat, so that the same effects as those of the above-described embodiments can be achieved.

  The present invention can be applied to, for example, an airbag and an airbag apparatus that protects an occupant by being attached and deployed along a side window of an automobile.

10 airbag
14 compartment
24 Predetermined surface
33 Airbag body
41 Outer fabric
42 Car interior base fabric
43 Tether as a connected body
47 Main expansion part
48 Secondary expansion part
61 One end
62 other end
69 Front airbag
73 Bend
76 Recess A A Crew

Claims (4)

An airbag including an airbag main body that is formed in a bag shape, is supplied with gas from a folded state, expands along a predetermined surface on the side of the vehicle compartment, and expands in the vehicle width direction,
The airbag body is
A main inflatable part arranged on the side of the occupant in the unfolded state;
The secondary inflatable part is arranged in a deployed state at a position including the side part of the front airbag that is communicated with the main inflatable part and is deployed in front of the occupant
The sub-inflation part has a recess at a position facing the side part of the front airbag in the deployed state. The airbag according to claim 1, wherein the sub-inflation portion has a bent portion that protrudes toward the outside of the vehicle and forms a recess on the inside of the vehicle. A vehicle outer side base fabric that constitutes at least the vehicle outer side of the sub-inflatable portion;
A vehicle interior base fabric that constitutes at least the passenger compartment side of the sub-expansion portion;
A plurality of upper and lower connections are made to connect the vehicle outer side base fabric and the vehicle inner side base fabric by connecting one end of the vehicle outer side base fabric and the other end of the vehicle inside the sub-inflatable portion. Body and
The distance between one end of the upper connecting body and one end of the lower connecting body is greater than the distance between the other end of the upper connecting body and the other end of the lower connecting body. The airbag according to claim 2. The airbag according to claim 3, wherein each connection body has a length at one end longer than a length at the other end.

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