JP2018171987A - Curtain airbag device - Google Patents

Abstract

A curtain airbag device is provided that further enhances the protection performance of an occupant's head during a side collision of a vehicle. An airbag 20 includes an inner chamber 40 provided on the vehicle interior side and an outer chamber 50 provided on the vehicle exterior side. The inner chamber 40 includes a front chamber 41 and a front chamber 41 provided on the front side of the vehicle interior. The rear chamber 42 is provided on the rear side, and the outer chamber 50 is provided with an upper chamber 51 provided on the upper side of the vehicle compartment and a lower chamber 52 provided on the lower side, the front chamber 41, the rear chamber 42, An inflator device 60 for individually developing the upper chamber 51 and the lower chamber 52 according to the collision mode is provided. [Selection] Figure 2

Description

  The present invention relates to a curtain airbag device for a vehicle.

  2. Description of the Related Art Conventionally, a curtain airbag device that protects an occupant from an impact caused by a collision (side collision) with a side surface of a vehicle is known (see, for example, Patent Document 1).

  The curtain airbag device includes a sensor that detects a side collision of the vehicle, an airbag that is attached to a side roof rail, and an inflator that supplies gas to the airbag. An airbag is a bag body, and a plurality of (here, two) chambers, the interior of which is partitioned in the front-rear direction by a partition portion, are arranged side by side. When such a curtain airbag device detects that a vehicle has collided with another vehicle or an obstacle such as an obstacle, it supplies gas by an inflator to inflate the airbag, and the side roof rail extends to the side of the vehicle compartment. The passenger is protected by being deployed in a curtain shape along the outside of the vehicle along the vehicle.

  There are various types of vehicle side collisions. For example, when a collision object collides with a wide area on the side of the vehicle (barrier collision), a vertically long columnar collision object such as a pole collides with the vehicle side. There is a case (pole side collision).

  When a collision with a relatively low vehicle height, such as an ordinary vehicle, occurs on the barrier side, the lower side of the vehicle body side (doors, etc.) (below the door belt line) is pressed into the vehicle and deforms, The upper side (above the door belt line) is deformed to the outside of the passenger compartment. Such a barrier-side collision increases the distance between the head and the curtain airbag, and this tendency is particularly strong for passengers with a low sitting height.

  Further, when the vehicle collides with a collision body having a relatively high vehicle height such as an RV vehicle, the vicinity of the door belt line on the side surface of the vehicle body is pressed toward the vehicle compartment side, and the lower side or upper side of the side surface of the vehicle body is deformed to the outside of the vehicle. . Such a barrier-side collision increases the distance between the head and the curtain airbag, and this tendency is particularly strong for an occupant with a high seating height.

  As described above, when the distance between the airbag and the occupant's head increases, only the occupant's head may be greatly shaken toward the outside of the passenger compartment. If the front-rear direction of the vehicle is the X axis, the head is swung so as to rotate toward the outside of the passenger compartment around the X axis due to the barrier side collision.

  Further, in the case of a pole side collision, a part of the airbag collided by the collision body is pushed into the vehicle interior side. For example, when the pole collides in front of the occupant's head, the front portion of the airbag is displaced toward the head with respect to the occupant's head. In such a case, there is a possibility that the head of the occupant is pushed and rotated from the diagonally front to the passenger compartment side. If the height direction of the vehicle is the Z axis, the head is swung so as to rotate toward the vehicle interior centering on the Z axis due to the above-described pole side collision.

  As described above, there is room for further occupant protection performance improvement in absorbing the impact caused by the rotation of the head.

JP 2008-012995 A

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a curtain airbag device that further enhances the protection performance of the head of an occupant during a side collision of a vehicle.

  A first aspect of the present invention that solves the above problem is a curtain airbag device including an airbag that is disposed along a vehicle front-rear direction above a side surface of a passenger compartment and that is inflated and deployed between the occupant and the side surface of the passenger compartment. The airbag is composed of an inner chamber provided on the vehicle compartment side and an outer chamber provided on the vehicle exterior side, and the inner chamber comprises a front chamber and a rear side provided on the front side of the vehicle compartment. The outer chamber includes an upper chamber provided on the upper side of the passenger compartment and a lower chamber provided on the lower side, the front chamber, the rear chamber, the upper chamber, A curtain airbag device comprising an inflator device that individually inflates and deploys the lower chamber according to a collision mode That.

  In the first aspect, the front chamber, the rear chamber, the upper chamber, and the lower chamber are individually inflated and expanded according to the detected collision mode. Thereby, according to a collision form, each chamber can be inflate-deployed in the shape suitable for a passenger | crew's physique. And by expanding and deploying the chamber in this way, it is possible to suppress the occupant's head from rotating about the X axis and the Z axis, and to improve the occupant protection performance.

  According to a second aspect of the present invention, in the curtain airbag device according to the first aspect, the airbag is formed in a bag shape, and the interior thereof includes the front chamber, the rear chamber, the upper chamber, and the lower chamber. The curtain airbag device is characterized in that it is divided into two parts.

  In the second aspect, since the airbag is divided into the inside and formed as one bag as a whole, the relative position between the inner chamber and the rear chamber, the relative position between the front chamber and the rear chamber, the upper chamber, The relative position with the lower chamber is difficult to shift. That is, since it is suppressed that each front chamber etc. shifts from intended arrangement, a crew member can be protected more certainly.

  According to a third aspect of the present invention, in the curtain airbag device according to the first or second aspect, when the inflator device detects a pole side collision, the rear chamber, the upper chamber, and the lower chamber are arranged. The curtain airbag device is inflated and deployed, and does not inflate and deploy the front chamber.

  In the 3rd mode, it can control that a crew member's head rotates centering on the Z-axis by not expanding and expanding a front chamber corresponding to pole side collision.

  According to a fourth aspect of the present invention, in the curtain airbag device according to any one of the first to third aspects, the inflator device is below the door belt line on the outer side surface in the vehicle width direction of the vehicle. In the curtain airbag device, when a barrier side collision is detected with respect to the side, the front chamber, the rear chamber, and the lower chamber are inflated and deployed, and the upper chamber is not inflated and deployed.

  In the fourth aspect, the upper chamber is not inflated and deployed in response to a barrier side collision with the lower portion of the door, thereby suppressing the occupant's head having a relatively low seat height from rotating about the X axis. it can.

  According to a fifth aspect of the present invention, in the curtain airbag device according to any one of the first to fourth aspects, the inflator device is provided with respect to the door belt line on the outer side surface in the vehicle width direction of the vehicle. In the curtain airbag device, when the barrier side collision is detected, the front chamber, the rear chamber, and the upper chamber are inflated and deployed, and the lower chamber is not inflated and deployed.

  In the fifth aspect, the lower chamber is not inflated and deployed in response to a barrier side collision with the vicinity of the door belt line, so that the head of a passenger with a relatively high seat height is prevented from rotating around the X axis. Can do.

  According to a sixth aspect of the present invention, in the curtain airbag device according to any one of the first to fifth aspects, at least the outer chamber is accommodated in one bag body. Located in the airbag device.

  In the sixth aspect, each chamber can be prevented from jumping out of the vehicle from the window portion where the door glass is broken due to a side collision, and the head can be protected more reliably by the airbag. .

  ADVANTAGE OF THE INVENTION According to this invention, the curtain airbag apparatus which improved the protection performance of the passenger | crew's head at the time of the side collision of a vehicle is provided.

It is the front view which looked at the curtain airbag device at the time of deployment from the passenger compartment side. It is a schematic perspective view of a curtain airbag device. It is a top view of an airbag. It is the side view which looked at the airbag from the front side of vehicles. It is a top view which shows the principal part of the curtain airbag apparatus in a pole side collision. It is a top view which shows the principal part of the curtain airbag apparatus in a pole side collision. It is a side view of the curtain airbag apparatus in the 1st barrier side collision. It is the side view to which the principal part of FIG. 7 was expanded. It is a side view of the curtain airbag apparatus in the 2nd barrier side collision. It is the side view to which the principal part of FIG. 9 was expanded. It is the front view which looked at the curtain airbag device at the time of deployment from the passenger compartment side. It is a top view of an airbag. It is the side view which looked at the airbag from the front side of vehicles. It is a top view which shows the principal part of the curtain airbag apparatus in a pole side collision. It is a top view which shows the principal part of the curtain airbag apparatus in a pole side collision. It is a side view of the curtain airbag apparatus in the 1st barrier side collision. It is a side view of the curtain airbag apparatus in the 2nd barrier side collision.

  Hereinafter, modes for carrying out the present invention will be described. In addition, description of embodiment is an illustration and this invention is not limited to the following description.

<Embodiment 1>
1 is a front view of the curtain airbag device when inflated and deployed as viewed from the passenger compartment side, FIG. 2 is a schematic perspective view of the curtain airbag device, and FIG. 3 is a top view of the airbag. FIG. 3 is a side view of the airbag as viewed from the front side of the vehicle. The airbag shown in each figure is in a state after being inflated and deployed. The longitudinal direction of the vehicle is the X direction, the vehicle width direction is the Y direction, and the height direction is the Z direction. The same applies to the subsequent drawings. The vehicle compartment according to the present embodiment includes a roof side rail 1 and a front pillar 2 that constitute a part of the side surface of the vehicle compartment and extend in the front-rear direction. The inflating and deploying means that the airbag 20 (chamber 30) is inflated by the gas from the inflator device 60 and deployed in a shape that protects the occupant, and is hereinafter also referred to as deployment.

  The curtain airbag device 10 according to the present embodiment includes an airbag 20 that is disposed along the X direction (front-rear direction of the vehicle) above the side surface of the vehicle compartment. The airbag 20 includes a chamber 30 attached to a single base member 21. Before the airbag 20 is deployed, the base member 21 is folded into a roll shape together with the chamber 30 in the airbag 20. Note that the base member 21 and the chamber 30 are both made of a cloth-like material.

  The folded airbag 20 is attached to the roof side rail 1 and the front pillar 2 via the attachment member 3 provided on the base member 21. The curtain airbag device 10 is covered with a front pillar garnish or a roof head lining (not shown).

  The chamber 30 is formed in a substantially rectangular parallelepiped bag shape, and is divided into a front chamber 41, a rear chamber 42, an upper chamber 51, and a lower chamber 52. The chamber 30 includes an inner chamber 40 provided on the vehicle compartment side and an outer chamber 50 provided on the vehicle exterior side. That is, the inner chamber 40 is disposed on the vehicle compartment side relative to the outer chamber 50.

  In the present embodiment, the chamber 30 is divided into an inner chamber 40 and an outer chamber 50 by a first partition wall 31 having an XZ plane (a plane with the vehicle width direction as a normal line). Of course, the present invention is not limited to such a mode of dividing by the planar first partition wall 31. At least the inner chamber 40 may have a portion facing the passenger, and the outer chamber 50 may have a portion facing the outside of the vehicle.

  The inner chamber 40 is divided into two in the longitudinal direction of the vehicle, and includes a front chamber 41 provided on the front side of the vehicle compartment and a rear chamber 42 provided on the rear side of the vehicle compartment. That is, the front chamber 41 is disposed on the front side relative to the rear chamber 42.

  In the present embodiment, the inner chamber 40 is divided into a front chamber 41 and a rear chamber 42 by the second partition wall 32. The 2nd partition 32 is a planar member arrange | positioned so that the diagonal of the inner chamber 40 may be seen in the top view shown in FIG.

  Thus, even if the front chamber 41 and the rear chamber 42 overlap each other in the vehicle width direction, the present invention can be used as long as the center portion of the front chamber 41 is disposed in front of the center portion of the rear chamber 42. include. Of course, although not particularly illustrated, the front chamber 41 and the rear chamber 42 may not overlap each other in the vehicle width direction, and the entire front chamber 41 may be disposed in front of the rear chamber 42. In other words, the portion with the longest length in the vehicle width direction of the front chamber 41 (the frontmost portion of the front chamber 41 in the example of FIG. 3) is the portion with the longest length in the vehicle width direction of the rear chamber 42 (FIG. 3). In this example, it is located in front of (the rearmost part of the rear chamber 42).

  The outer chamber 50 is divided into two in the vehicle height direction, and includes an upper chamber 51 provided on the upper side of the passenger compartment and a lower chamber 52 provided on the lower side of the passenger compartment. . That is, the upper chamber 51 is disposed relatively above the lower chamber 52.

  In the present embodiment, the outer chamber 50 is divided into an upper chamber 51 and a lower chamber 52 by the third partition wall 33. The third partition wall 33 is a planar member disposed along the diagonal line of the outer chamber 50 in a side view shown in FIG.

  Even if the upper chamber 51 and the lower chamber 52 overlap in the vehicle width direction as described above, the present invention can be used as long as the center portion of the upper chamber 51 is disposed above the center portion of the lower chamber 52. include. Of course, although not particularly illustrated, the upper chamber 51 and the lower chamber 52 may not overlap in the vehicle width direction, and the entire upper chamber 51 may be disposed above the lower chamber 52. In other words, the portion of the upper chamber 51 having the longest length in the vehicle width direction (the uppermost portion of the upper chamber 51 in the example of FIG. 4) is the portion of the lower chamber 52 having the longest length in the vehicle width direction (FIG. 4). In this example, it is located above the lowermost part of the lower chamber 52. The size, shape, and arrangement of the chamber 30 are not particularly limited, but in the present embodiment, the size, shape, and arrangement are sufficient to cover the entire glass portion of the door.

  As described above, the chamber 30 is formed in one bag shape, and the inside is divided into the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52. Thereby, the size of the front chamber 41 and the like can be easily changed by adjusting the position of the first partition wall 31 to the third partition wall 33. Moreover, since the chamber 30 is formed in one bag shape as a whole, the relative position between the inner chamber 40 and the outer chamber 50, the relative position between the front chamber 41 and the rear chamber 42, the upper chamber 51 and the lower chamber 52, The relative position of is difficult to shift. That is, since each front chamber 41 etc. are prevented from deviating from the intended arrangement, the occupant can be more reliably protected.

  The curtain airbag device 10 includes an inflator device 60. The inflator device 60 includes a first on-off valve 61 to a fourth on-off valve 64, an inflator body 65, a control device 66, and a pipe 69.

  The inflator body 65 is a device that holds a gas supplied to the chamber 30. Under the control of the control device 66, the held gas is released and the gas is supplied to the chamber 30 via the pipe 69.

  The pipe 69 connected to the inflator main body 65 is branched into four, and is connected to each of the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52.

  A first opening / closing valve 61 is provided in a part of the pipe 69 that connects the inflator main body 65 and the front chamber 41. A second on-off valve 62 is provided in a part of the pipe 69 that connects the inflator main body 65 and the rear chamber 42. A third on-off valve 63 is provided in a part of the pipe 69 that connects the inflator body 65 and the upper chamber 51. A fourth on-off valve 64 is provided in a part of the pipe 69 that connects the inflator main body 65 and the lower chamber 52.

  The first on-off valve 61 to the fourth on-off valve 64 are controlled to open and close by the control device 66. By opening the first on-off valve 61, gas is supplied from the inflator body 65 to the front chamber 41, and the front chamber 41 expands. The same applies to the other on-off valves. The rear chamber 42 is expanded by opening the second on-off valve 62, the upper chamber 51 is expanded by opening the third on-off valve 63, and the lower chamber is opened by opening the fourth on-off valve 64. 52 expands. When gas is supplied from the inflator body to the chamber 30, a front pillar garnish or a roof head lining (not shown) is pressed from the inside, and is developed into the vehicle interior from the gap. The airbag 20 is deployed in a curtain shape between the side surface of the passenger compartment and the occupant.

  The control device 66 is configured by a microcomputer including a central processing unit and a main storage device, and is a device that controls the operation of the vehicle engine and various devices. Further, the control device 66 includes a collision detection unit 67 and a deployment control unit 68. Each of these means is implemented as computer software executed by the control device 66, but is not limited thereto, and may be implemented as hardware such as an electronic circuit.

  The collision detection means 67 detects a collision mode when a collision object collides with the side of the vehicle. Examples of the collision mode include a pole side collision and a barrier side collision.

  The pole side collision refers to a collision mode in which a collision is received at a part of the vehicle door in the front-rear direction. For example, it is possible to detect a collision form in which a columnar collision body having a height such as a utility pole collides sideways.

  Barrier-side collision refers to a collision mode in which a collision is received on the entire side surface of the vehicle. Moreover, the collision detection means 67 detects the site | part which had a barrier side collision. Specifically, it is detected that there is a barrier side collision below the door belt line of the vehicle door. For example, it is possible to detect a collision mode in which a normal vehicle having a relatively low vehicle height collides. Further, it is detected that there is a barrier side collision with the door belt line of the vehicle door. For example, it is possible to detect a collision mode in which an RV vehicle having a relatively high vehicle height collides.

  The collision detection means 67 detects such a pole side collision and a barrier side collision as follows, for example. For example, a plurality of acceleration sensors are arranged on the side sill. Each acceleration sensor is arranged at an appropriate interval in the longitudinal direction of the vehicle. Based on the acceleration obtained from these acceleration sensors, the position at which the side collision has occurred is detected. For example, if some of the acceleration sensors protrude and output high acceleration, it can be determined that a pole-side collision has occurred. Further, the position of the pole-side collision can be specified from the place where the acceleration sensor that detects such high acceleration is arranged.

  On the other hand, when the variance of acceleration output from each acceleration sensor is smaller than a predetermined value, it can be determined that a barrier side collision has occurred. Further, a plurality of acceleration sensors are arranged on the B pillar (center pillar) at an appropriate interval. By using the acceleration of these acceleration sensors, it is possible to detect at which height the barrier side collision has occurred.

  The collision detection means 67 of this embodiment detects whether a barrier side collision has occurred below the door belt line, or whether a barrier side collision has occurred with respect to the door belt line (or the vicinity thereof). Hereinafter, the former is also referred to as a first barrier side collision, and the latter is also referred to as a second barrier side collision.

  The deployment control means 68 deploys the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52 individually according to the collision mode. As a means for developing each chamber individually, gas is supplied to the inflator main body 65 to the pipe 69, and each of the fourth opening / closing valve 64 is controlled to be opened / closed by opening / closing each of the chambers individually. .

  The deployment control means 68 has a map that defines the chamber to be deployed for each of the collision modes of the pole side collision, the first barrier side collision, and the second barrier side collision. Since the chamber to be developed is determined by opening / closing the first opening / closing valve 61 to the fourth opening / closing valve 64, the correspondence between the collision mode and the opening / closing of the fourth opening / closing valve 64 from the first opening / closing valve 61 is a map.

  The unfolding control means 68 opens and closes the first on-off valve 61 to the fourth on-off valve 64 in accordance with the collision mode detected by the collision detection means 67 using the map stored in the storage means in advance. Read out. The map is preferably defined as shown in Table 1, for example. The map is not limited to such an aspect.

  By opening / closing the fourth opening / closing valve 64 from the first opening / closing valve 61 based on such a map, the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52 are individually developed according to the collision mode. be able to.

  The deployment of the chamber 30 and the occupant protection in the pole side collision will be described. FIG.5 and FIG.6 is a top view which shows the principal part of the curtain airbag apparatus 10 in a pole side collision.

  As shown in FIG. 5, in the pole side collision, the columnar collision body 110 collides with a part of a door (not shown). The collision detection means 67 detects such a pole side collision. Then, the deployment control means 68 opens the second on-off valve 62, the third on-off valve 63, and the fourth on-off valve 64 based on the map shown in Table 1, so that the rear chamber 42, the upper chamber 51, and the lower The chamber 52 (outer chamber 50) is developed. On the other hand, the first on-off valve 61 remains closed, and the front chamber 41 is not expanded.

  In such a pole side collision, the front chamber 41 does not expand. For this reason, the front portion of the occupant 100 in the chamber 30 is narrower in the vehicle width direction than the rear portion. That is, the distance between the front portion of the chamber 30 and the occupant 100 is larger than the distance between the rear portion of the chamber 30 (the rear chamber 42) and the occupant 100.

  As shown in FIG. 6, when the collision body 110 further enters the passenger compartment side from an oblique front of the occupant 100, the front portion of the chamber 30 is pressed into the passenger compartment and deformed. However, since the distance between the front portion and the occupant 100 is large as described above, the degree to which the front portion of the chamber 30 presses the head of the occupant 100 toward the passenger compartment can be suppressed. That is, it is suppressed that the head of the occupant 100 is pressed toward the passenger compartment side by the front portion of the chamber 30 and rotated about the Z axis toward the passenger compartment side.

  Thus, since the curtain airbag device 10 of the present embodiment suppresses the Z-axis rotation of the head of the occupant 100 due to the pole-side collision, the protection performance of the occupant is improved.

  The deployment of the chamber 30 and the occupant protection in the first barrier side collision will be described. FIG. 7 is a side view showing the main part of the curtain airbag device 10 in the first barrier side collision as seen from the front side of the vehicle, and FIG. 8 is an enlarged side view of the main part of FIG.

  As shown in FIG. 7, in the first barrier side collision, a collision body 110 such as another vehicle collides with the door 120. The height direction is lower than the door belt line 121. In such a first barrier-side collision, the lower part of the door 120 is deformed to the passenger compartment side, and the upper part of the door 120 (above the door belt line 121) is deformed to the outer side of the passenger compartment.

  When all of the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52 constituting the chamber 30 are expanded, the chamber 30 is expanded along the upper side of the door 120, and the lower portion of the chamber 30 is outside the vehicle interior. It becomes a state inclined to.

  However, the curtain airbag device 10 of the present embodiment does not deploy the upper chamber 51 by closing the third on-off valve 63 as shown in Table 1 in the first barrier side collision.

  As shown in FIG. 8, specifically, the collision detection means 67 detects a first barrier side collision. The deployment control means 68 opens the first on-off valve 61, the second on-off valve 62, and the fourth on-off valve 64 based on the map shown in Table 1 so that the front chamber 41 and the rear chamber 42 (inside The chamber 40) and the lower chamber 52 are expanded. On the other hand, the third on-off valve 63 remains closed and the upper chamber 51 is not expanded. Thereby, the width D2 of the lower part of the chamber 30 in the vehicle width direction is wider than the width D1 of the upper part in the vehicle width direction.

  As described above, since the lower portion of the chamber 30 is inclined to the outside of the passenger compartment, the distance between the occupant 100B having a relatively low seat height and the lower portion of the chamber 30 is increased. However, in the first barrier side collision, the upper chamber 51 is not expanded so that the width D2 of the lower portion of the chamber 30 in the vehicle width direction is relatively larger than the width D1 of the upper portion. As a result, the distance between the occupant 100B and the lower portion of the chamber 30 can be reduced.

  As described above, in the first barrier side collision, it is possible to suppress the interval between the head of the occupant 100B and the chamber 30 from being widened. Thereby, it can suppress that the head of the passenger | crew 100B shakes largely outside a passenger compartment centering on the X-axis, and can improve a passenger | crew's protection performance.

  The deployment of the chamber 30 and the occupant protection in the second barrier side collision will be described. FIG. 9 is a side view showing the main part of the curtain airbag device 10 in the second barrier side collision as viewed from the front side of the vehicle, and FIG. 10 is an enlarged side view of the main part of FIG.

  As shown in FIG. 9, in the second barrier side collision, a collision body 110 such as another vehicle side impacts the door 120. The height direction is near the door belt line 121. In such a second barrier side collision, the upper and lower portions of the door 120 are deformed to the outside of the passenger compartment, and the vicinity of the door belt line 121 of the door 120 is deformed to the passenger compartment side.

  When all of the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52 constituting the chamber 30 are expanded, the chamber 30 is expanded along the upper side of the door 120, and the upper portion of the chamber 30 is outside the vehicle interior. It becomes a state inclined to.

  However, the curtain airbag device 10 of the present embodiment does not deploy the lower chamber 52 by closing the fourth on-off valve 64 as shown in Table 1 in the second barrier side collision.

  As shown in FIG. 10, specifically, the collision detection means 67 detects the second barrier side collision. The deployment control means 68 opens the first on-off valve 61, the second on-off valve 62, and the third on-off valve 63 based on the map shown in Table 1, so that the front chamber 41, the rear chamber 42 (inside The chamber 40) and the upper chamber 51 are expanded. On the other hand, the fourth on-off valve 64 remains closed, and the lower chamber 52 is not expanded. Thereby, the width D1 of the upper part of the chamber 30 in the vehicle width direction is wider than the width D2 of the lower part in the vehicle width direction.

  As described above, since the upper portion of the chamber 30 is inclined to the outside of the passenger compartment, the distance between the occupant 100A having a relatively high seat height and the upper portion of the chamber 30 is increased. However, in the second barrier side collision, the lower chamber 52 is not expanded so that the width D1 of the upper portion of the chamber 30 in the vehicle width direction is relatively larger than the width D2 of the lower portion. As a result, the distance between the occupant 100A and the upper portion of the chamber 30 can be reduced.

  In this way, in the second barrier side collision, it is possible to suppress the interval between the head of the occupant 100A and the chamber 30 from being widened. Accordingly, it is possible to suppress the head of the occupant 100A from being greatly shaken toward the outside of the passenger compartment around the X axis, and the protection performance of the occupant can be improved.

  As described above, the curtain airbag device 10 of the present embodiment individually deploys the front chamber 41, the rear chamber 42, the upper chamber 51, and the lower chamber 52 according to the detected collision mode. Thereby, the chamber 30 can be developed into a shape suitable for the occupant's physique according to the collision mode. And by deploying the chamber 30 in this way, the occupant's head can be prevented from rotating around the X-axis and the Z-axis, and the occupant's protection performance can be improved.

  Moreover, the curtain airbag apparatus 10 of this embodiment can suppress that a passenger | crew's head rotates centering on a Z-axis by not deploying the front chamber 41 corresponding to a pole side collision.

  Further, the curtain airbag device 10 of the present embodiment does not deploy the upper chamber 51 corresponding to the first barrier side collision, so that the head of the occupant with a relatively low seat height rotates around the X axis. Can be suppressed.

  Further, the curtain airbag device 10 of the present embodiment does not deploy the lower chamber 52 corresponding to the second barrier side collision, so that the head of the occupant with a relatively high seat height rotates about the X axis. Can be suppressed.

<Embodiment 2>
In the first embodiment, the front chamber 41 and the like are formed by dividing the inside of one rectangular parallelepiped chamber 30, but the present invention is not limited to such a mode. You may form a front chamber etc. separately.

  11 is a front view of the curtain airbag device when deployed from the passenger compartment side, FIG. 12 is a top view of the airbag, and FIG. 13 is a side view of the airbag viewed from the front side of the vehicle. . The airbag in each figure is in a state after deployment. In addition, the same code | symbol is attached | subjected to the same thing as Embodiment 1, and the overlapping description is abbreviate | omitted.

  The curtain airbag device 10A according to the present embodiment includes an airbag 20A disposed along the X direction (the vehicle front-rear direction) above the side surface of the vehicle compartment. The airbag 20A is formed in a bag shape by stitching two cloth-like members. A chamber 30A is accommodated inside the airbag 20A. Before the airbag 20A is deployed, the airbag 20A is folded together with the chamber 30A in a roll shape.

  The chamber 30A is composed of a plurality (four in this embodiment) of chambers. The chamber 30A includes an inner chamber 40A provided on the vehicle compartment side and an outer chamber 50A provided on the vehicle exterior side. That is, the inner chamber 40A is disposed closer to the vehicle compartment than the outer chamber 50A. Although not particularly illustrated, the interior of the airbag 20A is divided into a compartment side and a compartment exterior side. The compartment on the compartment side accommodates the inner chamber 40A, and the compartment on the compartment exterior side. Contains an outer chamber 50A.

  The inner chamber 40A includes a front chamber 41A provided on the front side of the passenger compartment, and a rear chamber 42A provided on the rear side of the passenger compartment. That is, the front chamber 41A is disposed on the front side relative to the rear chamber 42A.

  The front chamber 41 </ b> A and the rear chamber 42 </ b> A are bags that are long in the height direction, and each has a substantially cylindrical shape, but the shape is not limited. Further, the height of the front chamber 41A and the rear chamber 42A is set to be higher than the head of the seated passenger. Furthermore, these seats are arranged so that the heads of seated passengers are positioned between the front chamber 41A and the rear chamber 42A. Although not particularly illustrated, the front chamber 41A and the rear chamber 42A are attached to the inner surface of the airbag 20.

  The outer chamber 50A includes an upper chamber 51A provided on the upper side of the passenger compartment, and a lower chamber 52A provided on the lower side of the passenger compartment. That is, the upper chamber 51A is disposed relatively above the lower chamber 52A.

  The upper chamber 51A and the lower chamber 52A are bag bodies that are long in the front-rear direction, and each has a substantially cylindrical shape, but the shape is not limited. The lengths of the upper chamber 51A and the lower chamber 52A are about the length of the front seat in the front-rear direction. Furthermore, the seats of the seated passengers are arranged so that the heads of the occupants are located between the upper chamber 51A and the lower chamber 52A. Although not particularly illustrated, the upper chamber 51A and the lower chamber 52A are attached to the inner surface of the airbag 20.

  The curtain airbag device 10 </ b> A includes an inflator device 60. The inflator device 60 has the same configuration as that of the first embodiment. The curtain airbag device 10A opens and closes the fourth open / close valve 64 (not shown) from the first open / close valve 61 based on the map described in the first embodiment, so that the front chamber 41A and the rear The chamber 42A, the upper chamber 51A, and the lower chamber 52A can be developed individually.

  The deployment of the chamber 30A and the occupant protection in the pole side collision will be described. FIG.14 and FIG.15 is a top view which shows the principal part of 10 A of curtain airbag apparatuses in a pole side collision.

  As shown in FIG. 14, in the pole side collision, the columnar collision body 110 collides with a part of a door (not shown). The collision detection means 67 detects such a pole side collision. Then, the deployment control means 68 opens the second on-off valve 62, the third on-off valve 63, and the fourth on-off valve 64 based on the map shown in Table 1, so that the rear chamber 42A, the upper chamber 51A, and the lower The chamber 52A (outer chamber 50A) is developed. On the other hand, the first on-off valve 61 remains closed, and the front chamber 41A is not expanded.

  In such a pole side collision, the front chamber 41A does not expand. Therefore, in the chamber 30A, the front portion of the occupant 100 is narrower in the vehicle width direction than the rear portion. That is, the distance between the front portion of the chamber 30A and the occupant 100 is larger than the distance between the rear portion of the chamber 30A (the rear chamber 42A) and the occupant 100.

  As shown in FIG. 15, when the collision body 110 further enters the passenger compartment side from an oblique front of the occupant 100, the front portion of the chamber 30A is pressed into the passenger compartment and deformed. However, since the distance between the front portion and the occupant 100 is wide as described above, the degree to which the front portion of the chamber 30A presses the head of the occupant 100 toward the passenger compartment can be suppressed. That is, it is suppressed that the head of the occupant 100 is pressed toward the passenger compartment side by the front portion of the chamber 30A and rotates toward the passenger compartment side about the Z axis.

  As described above, the curtain airbag device 10A according to the present embodiment suppresses the Z-axis rotation of the head of the occupant 100 due to the pole-side collision, so that the protection performance of the occupant is improved.

  The development of the chamber 30A and the occupant protection in the first barrier side collision will be described. FIG. 16 is a side view showing the main part of the curtain airbag device 10A in the first barrier side collision as seen from the front side of the vehicle.

  As shown in FIG. 16, specifically, the collision detection means 67 detects the first barrier side collision. Then, the deployment control means 68 opens the first on-off valve 61, the second on-off valve 62, and the fourth on-off valve 64 based on the map shown in Table 1, so that the front chamber 41A, the rear chamber 42A (inside The chamber 40A) and the lower chamber 52A are expanded. On the other hand, the third on-off valve 63 remains closed, and the upper chamber 51A is not expanded. Thereby, the width D2 of the lower part of the chamber 30A in the vehicle width direction is wider than the width D1 of the upper part in the vehicle width direction.

  In the first barrier side collision, since the lower part of the chamber 30A is inclined to the outside of the passenger compartment (see Embodiment 1, FIG. 7, FIG. 8), the distance between the occupant 100B having a relatively low seat height and the lower part of the chamber 30A Will open. However, in the first barrier side collision, the upper chamber 51A is not expanded so that the width D2 of the lower portion of the chamber 30A in the vehicle width direction is relatively larger than the upper width D1, so that the occupant 100B and the chamber 30A The distance to the lower part of can be reduced.

  As described above, in the first barrier side collision, it is possible to suppress the interval between the head of the occupant 100B and the chamber 30A from being widened. Thereby, it can suppress that the head of the passenger | crew 100B shakes largely outside a passenger compartment centering on the X-axis, and can improve a passenger | crew's protection performance.

  The development of the chamber 30A and the occupant protection in the second barrier side collision will be described. FIG. 17 is a side view showing the main part of the curtain airbag device 10A in the second barrier side collision as seen from the front side of the vehicle.

  As shown in FIG. 17, specifically, the collision detection unit 67 detects the second barrier side collision. Then, the deployment control means 68 opens the first on-off valve 61, the second on-off valve 62, and the third on-off valve 63 based on the map shown in Table 1, so that the front chamber 41A and the rear chamber 42A (inside The chamber 40A) and the upper chamber 51A are developed. On the other hand, the fourth on-off valve 64 remains closed, and the lower chamber 52A is not expanded. Thereby, the width D1 of the upper part of the chamber 30A in the vehicle width direction is wider than the width D2 of the lower part in the vehicle width direction.

  In the second barrier side collision, the upper portion of the chamber 30A is inclined to the outside of the passenger compartment (see the first embodiment, FIG. 9 and FIG. 10), so the distance between the occupant 100A having a relatively high seat height and the upper portion of the chamber 30A. Will open. However, in the second barrier side collision, the lower chamber 52A is not expanded so that the width D1 of the upper portion of the chamber 30A in the vehicle width direction is relatively larger than the width D2 of the lower portion, so that the occupant 100A and the chamber 30A The distance from the top of the can be reduced.

  As described above, in the second barrier side collision, it is possible to suppress the interval between the head of the occupant 100A and the chamber 30A from widening. Accordingly, it is possible to suppress the head of the occupant 100A from being greatly shaken toward the outside of the passenger compartment around the X axis, and the protection performance of the occupant can be improved.

  As described above, the curtain airbag device 10A of the present embodiment individually deploys the front chamber 41A, the rear chamber 42A, the upper chamber 51A, and the lower chamber 52A according to the detected collision mode. Thereby, according to the collision form, the chamber 30A can be developed into a shape suitable for the occupant's physique. And by deploying the chamber 30A in this way, it is possible to suppress the occupant's head from rotating around the X axis and the Z axis, and to improve the occupant protection performance.

  Further, the curtain airbag device 10A according to the present embodiment can prevent the occupant's head from rotating about the Z axis by not deploying the front chamber 41A corresponding to the pole side collision.

  Further, the curtain airbag device 10A of the present embodiment does not deploy the upper chamber 51A corresponding to the first barrier side collision, so that the head of the occupant having a relatively low seat height rotates around the X axis. Can be suppressed.

  Further, the curtain airbag device 10A of the present embodiment does not deploy the lower chamber 52A corresponding to the second barrier side collision, so that the head of the occupant having a relatively high seat height rotates around the X axis. Can be suppressed.

  In the curtain airbag device 10A of the present embodiment, the front chamber 41A, the rear chamber 42A, the upper chamber 51A, and the lower chamber 52A are accommodated in the airbag 20 that is a bag body. Thereby, it can prevent that each chamber jumps out of the vehicle from the window part which the door glass broke by side collision, and can protect the head by the airbag 20 more reliably.

<Other embodiments>
As mentioned above, although one embodiment of the present invention has been described, of course, the present invention is not limited to the above-described embodiment, and addition, omission, replacement, etc., of a configuration is possible without departing from the spirit of the present invention. And other changes are possible.

  Although the airbag 20 is provided along the roof side rail 1 and the front pillar 2 with respect to the seat of the front seat, the attachment position is not particularly limited, and may be attached to, for example, the roof side rail on the rear seat side. Moreover, although the airbag 20 was provided in the passenger seat side, it is not limited to this, You may arrange | position at the driver seat side.

DESCRIPTION OF SYMBOLS 10, 10A ... Curtain airbag apparatus 20, 20A ... Airbag 30, 30A ... Chamber 40, 40A ... Inner chamber 41, 41A ... Front chamber 42, 42A ... Rear chamber 50, 50A ... Outer chamber 51, 51A ... Upper chamber 52 52A ... Lower chamber 60 ... Inflator device 66 ... Control device

Claims (6)

A curtain airbag device including an airbag that is disposed along the front-rear direction of the vehicle above the side surface of the passenger compartment and inflates and deploys between the passenger and the side surface of the passenger compartment.
The airbag includes an inner chamber provided on the vehicle interior side and an outer chamber provided on the vehicle exterior side,
The inner chamber is composed of a front chamber provided on the front side of the passenger compartment and a rear chamber provided on the rear side,
The outer chamber is composed of an upper chamber provided on the upper side of the passenger compartment and a lower chamber provided on the lower side,
A curtain airbag device comprising: an inflator device that individually inflates and deploys the front chamber, the rear chamber, the upper chamber, and the lower chamber according to a collision mode. The curtain airbag device according to claim 1,
The airbag is formed in a bag shape, and is divided into the front chamber, the rear chamber, the upper chamber, and the lower chamber. In the curtain airbag device according to claim 1 or 2,
When the inflator device detects a pole-side collision, the rear chamber, the upper chamber, and the lower chamber are inflated and deployed, and the front chamber is not inflated and deployed. In the curtain airbag device according to any one of claims 1 to 3,
When the inflator device detects a barrier side collision with respect to the lower side of the door belt line on the outer side surface in the vehicle width direction of the vehicle, the inflator device expands and deploys the front chamber, the rear chamber, and the lower chamber, A curtain airbag device characterized in that the upper chamber is not inflated and deployed. In the curtain airbag device according to any one of claims 1 to 4,
The inflator device expands and expands the front chamber, the rear chamber, and the upper chamber, and expands the lower chamber when detecting a barrier side collision with respect to the door belt line on the outer side surface in the vehicle width direction of the vehicle. Curtain airbag device characterized by not being deployed. The curtain airbag device according to any one of claims 1 to 5,
At least the outer chamber is accommodated in a single bag body.

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