JP2020131725A - Curtain airbag and curtain airbag device - Google Patents

Abstract

To suppress rotation of a head of a crewman guided forward.SOLUTION: A curtain airbag comprises: a curtain airbag body which is inflated by a gas from an inflator; and a tie panel which is connected to an upper part and a lower part of the curtain airbag body by an upper connection part and a lower connection part respectively. The curtain airbag body has: an indoor side first panel; an outdoor side second panel; and a coupling part which couples the first panel and the second panel. The coupling part has a peripheral edge coupling part along peripheral edge parts of the first panel and the second panel, an inner side coupling part which is positioned on an inner side with respect to the peripheral edge coupling part. An intermediate coupling part, which partitions an intermediate region into plural inflation chambers including at least an upper inflation chamber and a lower inflation chamber, exists as a part of the inner side coupling part, and plural virtual circles with a same diameter, which are arranged in a vehicle longitudinal direction, inscribe at least two places of an upper side coupling part and a lower side coupling part of the upper inflation chamber and the lower inflation chamber.SELECTED DRAWING: Figure 2

Description

The present invention relates to curtain airbags and curtain airbag devices.

Conventionally, a curtain airbag that expands downward along a side surface of a vehicle interior is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-08993

When the vehicle collides diagonally from the front, the occupant's head is guided forward by the inflated curtain airbag. At this time, it is required to suppress the rotation of the occupant's head and guide the head forward.

Therefore, the present disclosure provides a curtain airbag and a curtain airbag device capable of suppressing the rotation of the head of an occupant guided forward.

This disclosure is
A curtain airbag that extends downward along the side of the vehicle interior.
The curtain airbag body, which is inflated by the gas from the inflator,
The curtain airbag body is arranged on the outdoor side in the intermediate region in the vehicle front-rear direction, and includes a tie panel connected to the upper part and the lower part of the curtain airbag body by an upper connecting portion and a lower connecting portion, respectively.
The curtain airbag main body has a first panel on the indoor side, a second panel on the outdoor side, and a joint portion for connecting the first panel and the second panel.
The joint has a peripheral joint along the peripheral edges of the first panel and the second panel, and an inner joint located inside the peripheral joint.
The length from the upper connecting portion to the lower connecting portion of the tie panel is shorter than the length from the upper connecting portion to the lower connecting portion of the curtain airbag body.
As part of the inner coupling portion, there is an intermediate coupling portion that partitions the intermediate region into a plurality of expansion chambers including at least an upper expansion chamber and a lower expansion chamber.
Provided is a curtain airbag in which a plurality of virtual circles having the same diameter arranged in the front-rear direction of the vehicle are inscribed at at least two positions, an upper joint portion and a lower joint portion of the upper expansion chamber.

In addition, this disclosure is
A curtain airbag that extends downward along the side of the vehicle interior.
The curtain airbag body, which is inflated by the gas from the inflator,
The curtain airbag body is arranged on the outdoor side in the intermediate region in the vehicle front-rear direction, and includes a tie panel connected to the upper part and the lower part of the curtain airbag body by an upper connecting portion and a lower connecting portion, respectively.
The curtain airbag main body has a first panel on the indoor side, a second panel on the outdoor side, and a joint portion for connecting the first panel and the second panel.
The joint has a peripheral joint along the peripheral edges of the first panel and the second panel, and an inner joint located inside the peripheral joint.
The length from the upper connecting portion to the lower connecting portion of the tie panel is shorter than the length from the upper connecting portion to the lower connecting portion of the curtain airbag body.
As part of the inner coupling portion, there is an intermediate coupling portion that partitions the intermediate region into a plurality of expansion chambers including at least an upper expansion chamber and a lower expansion chamber.
The upper expansion chamber provides a curtain airbag having a plurality of portions having the same width in a direction different from the vehicle front-rear direction.

In addition, this disclosure is
A curtain airbag that extends downward along the side of the vehicle interior.
The curtain airbag body, which is inflated by the gas from the inflator,
The curtain airbag body is arranged on the outdoor side in the intermediate region in the vehicle front-rear direction, and includes a tie panel connected to the upper part and the lower part of the curtain airbag body by an upper connecting portion and a lower connecting portion, respectively.
The curtain airbag main body has a first panel on the indoor side, a second panel on the outdoor side, and a joint portion for connecting the first panel and the second panel.
The joint has a peripheral joint along the peripheral edges of the first panel and the second panel, and an inner joint located inside the peripheral joint.
The length from the upper connecting portion to the lower connecting portion of the tie panel is shorter than the length from the upper connecting portion to the lower connecting portion of the curtain airbag body.
As part of the inner coupling portion, there is an intermediate coupling portion that partitions the intermediate region into a plurality of expansion chambers including at least an upper expansion chamber and a lower expansion chamber.
The upper expansion chamber guides the head with a guide surface without the inner coupling portion so that the occupant's head comes into contact with the front collision airbag without reaching the front joint portion of the upper expansion chamber. , Curtain airbags are provided.

In addition, this disclosure is
Provided is a curtain airbag device including the curtain airbag and the inflator.

According to the technique of the present disclosure, it is possible to provide a curtain airbag and a curtain airbag device capable of suppressing the rotation of the head of an occupant guided forward.

It is a front view of the room side of the curtain airbag in 1st Embodiment. It is a partially enlarged front view of the indoor side of the curtain airbag in 1st Embodiment. It is a figure which shows the relationship between an occupant, a curtain airbag, and a frontal collision airbag from the upper view. It is a figure which shows the curtain airbag which receives the head of an occupant from the upper view. It is a figure which shows the curtain airbag which receives the head of an occupant from the front view. It is the front view which partially enlarged the indoor side of the curtain airbag in 2nd Embodiment. It is a partially enlarged front view of the interior side of the curtain airbag in the third embodiment. It is a partially enlarged front view of the indoor side of the curtain airbag in 4th Embodiment. FIG. 5 is a partially enlarged front view of the indoor side of the curtain airbag according to the fifth embodiment. 6 is a partially enlarged front view of the indoor side of the curtain airbag according to the sixth embodiment. FIG. 5 is a partially enlarged front view of the indoor side of the curtain airbag according to the seventh embodiment. FIG. 5 is a partially enlarged front view of the indoor side of the curtain airbag according to the eighth embodiment.

Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings. In each form, deviations to the extent that the effects of the present invention are not impaired are allowed in the directions such as parallel, right angle, horizontal, vertical, up / down, left / right, and front / back. Further, the X-axis direction, the Y-axis direction, and the Z-axis direction represent a direction parallel to the X-axis, a direction parallel to the Y-axis, and a direction parallel to the Z-axis, respectively. The X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other. The XY plane, YZ plane, and ZX plane are a virtual plane parallel to the X-axis direction and the Y-axis direction, a virtual plane parallel to the Y-axis direction and the Z-axis direction, and a virtual plane parallel to the Z-axis direction and the X-axis direction, respectively. Represents.

Further, in the following description, the X-axis direction, the Y-axis direction, and the Z-axis direction correspond to the vehicle width direction, the vehicle front-rear direction, and the vehicle vertical direction, respectively, when the curtain airbag is installed in the vehicle. The positive side in the Y-axis direction corresponds to the front side of the vehicle, and the negative side in the Y-axis direction corresponds to the rear side of the vehicle. The positive side in the Z-axis direction corresponds to the upper side of the vehicle, and the negative side in the Z-axis direction corresponds to the lower side of the vehicle.

Further, in the following description, unless otherwise specified, an embodiment in which the occupant on the left side of the center of the vehicle in the vehicle width direction is restrained will be described. The technique of the present disclosure can also be applied to an embodiment in which the occupant on the right side is restrained with respect to the center in the vehicle width direction, and the following description is incorporated for the description of the embodiment in which the occupant on the right side is restrained. Omitted or abbreviated with.

FIG. 1 is a front view of the curtain airbag according to the first embodiment from the indoor side. In the front view described later with reference to FIG. 1 and other embodiments, the curtain airbag or the curtain airbag body is in a flatly unfolded state before folding.

The curtain airbag device 100 shown in FIG. 1 includes an inflator 1 and a curtain airbag 101 that expands and expands by the gas supplied from the inflator 1. The curtain airbag 101 deploys downward along the side surface of the vehicle interior. The curtain airbag 101 includes a curtain airbag main body 2, tie panels 3 and 3A provided on the outdoor side of the curtain airbag main body 2, and a duct panel 4 arranged inside the curtain airbag main body 2. The duct panel 4 is a rectifying cloth for dividing the gas from the inflator 1 inserted into the insertion portion 7 into the front and the rear.

The curtain airbag main body 2 is expanded by the gas from the inflator 1 inserted into the insertion portion 7. In this embodiment, the curtain airbag main body 2 has an inner panel 5 (an example of a first panel) which is an indoor panel and an outer panel 6 (an example of a second panel) which is an outdoor panel. It has a combined configuration. By connecting the superposed inner panel 5 and the outer panel 6 to each other by the linear connecting portions 60 to 69, 71, 74 and the annular connecting portion 40 to 50, the difference between the inner panel 5 and the outer panel 6 The inclusion portion 7, the expansion chambers 8 to 19, and the gas passage portions 20 to 24 are formed.

The linear joints 60 to 69, 71, 74 and the annular joints 40 to 50 airtightly connect the panels 5 and 6 to each other, and even if the internal pressure of the curtain airbag body 2 rises to the design upper limit pressure, the panels It is formed by a strong coupling means so that the 5 and 6 do not separate from each other. Such bonding means include, for example, suturing with a high-strength sewing thread, bonding with a high-adhesive adhesive, or welding. When the panels 5 and 6 are sewn, a sealing adhesive (sealant) may be applied to the planned suture portion of the panel and then sewn, or the panels may be sewn without applying the sealant. In the linear joint portions 60 to 69, 71, 74 and the annular joint portions 40 to 50, the solid line represents the sewing thread, and the strip-shaped region sandwiched between the broken lines on both sides of the solid line represents the joint region due to adhesion or the like.

The linear joint portion 60 is an example of a peripheral joint portion that extends so as to substantially orbit the curtain airbag main body 2 and is along the peripheral edges of the inner panel 5 and the outer panel 6. The linear joint portion 60 is cut off in the middle of the upper edge of the curtain airbag main body 2 in the front-rear direction. An insertion portion 7 is formed in this disconnection portion. The linear coupling portions 61 to 69, 71, 74 and the cyclic coupling portions 40 to 50 are examples of inner coupling portions located inside the linear coupling portion 60.

The tie panel 3 is arranged on the outdoor side of the curtain airbag main body 2 in the intermediate region 2a in the vehicle front-rear direction. The upper side portion of the tie panel 3 is connected to the panels 5 and 6 by an upper connecting portion 72b along the upper side portion of the curtain airbag main body 2. The lower side portion of the tie panel 3 is connected to the panels 5 and 6 by a lower connecting portion 72a along the lower side portion of the curtain airbag main body 2. The upper connecting portion 72b and the lower connecting portion 72a may be a sutured portion made of a high-strength sewing thread, an adhesive portion made of an adhesive having a high adhesive strength, or a welded portion made of welding. The upper connecting portion 72b may be shared with the linear connecting portion 60 on the upper side, and the lower connecting portion 72a may be shared with the linear connecting portion 60 on the lower side. That is, the upper connecting portion 72b and the lower connecting portion 72
Each of a may be a part of the linear joint portion 60.

The tie panel 3A is a rear region of the curtain airbag body 2 in the vehicle front-rear direction (for example, a region on the vehicle rear side with respect to the insertion portion 7, or a center that bisects the curtain airbag body 2 in the vehicle front-rear direction. It is located on the outdoor side in the area on the rear side of the vehicle with respect to the line). The tie panel 3A is also connected to the curtain airbag main body 2 in the same manner as the tie panel 3.

The length from the upper connecting portion 72b to the lower connecting portion 72a in the state where the tie panel 3 is flatly spread is from the length from the upper connecting portion 72b to the lower connecting portion 72a of the curtain airbag main body 2 before attaching the tie panel 3. Is also short. Like the tie panel 3, the tie panel 3A also has a shorter length from the upper connecting portion to the lower connecting portion than the curtain airbag main body 2 before attaching the tie panel 3A. With such a length set, when gas is supplied from the inflator 1, the curtain airbag main body 2 projects indoor with respect to the tie panels 3 and 3A when viewed from the Y-axis direction. Inflate like.

In the front portion of the curtain airbag main body 2, the linear coupling portion 61 extends downward from the linear coupling portion 60 on the upper side and then extends forward. The end of the forward extension of the linear joint 61 is connected to the annular joint 40. An expansion chamber 14 on the front upper side is formed between the linear joint portion 61 and the linear joint portion 60 on the front upper side. A gas passing portion 22 is formed between the annular connecting portion 40 and the linear connecting portion 60 on the front side.

In the front portion of the curtain airbag main body 2, the linear coupling portion 62 extends upward from the linear coupling portion 60 on the lower side. The end of the upward extension of the linear joint 62 is connected to the annular joint 41. An expansion chamber 13 on the lower front side is formed between the linear joint portion 61, the linear joint portion 62, and the linear joint portion 60 on the lower front side. A gas passing portion 21 is formed between the annular coupling portion 41 and the linear coupling portion 61.

The linear coupling portions 63, 64, 65 and the cyclic coupling portion 42 are examples of intermediate coupling portions that partition the intermediate region 2a into a plurality of expansion chambers including at least the expansion chamber 8 and the expansion chamber 10. The intermediate region 2a is a region that overlaps with the tie panel 3, a region in the vicinity thereof, or both regions in the front view in the X-axis direction. The expansion chamber 8 is an example of an upper expansion chamber, and the expansion chamber 10 is an example of a lower expansion chamber. In the form shown in FIG. 1, the linear coupling portions 63, 64, 65 and the cyclic coupling portion 42 divide the intermediate region 2a into an expansion chamber 8, an expansion chamber 10, and an expansion chamber 12.

FIG. 2 is a partially enlarged front view of the indoor side of the curtain airbag 101 shown in FIG.

The linear connecting portion 63 extends linearly in the front-rear direction of the vehicle. The end portion of the linear coupling portion 63 extending forward is connected to the annular coupling portion 42. A circular patch cloth 29 is arranged in the portion provided with the annular connecting portion 46, and the panels 5 and 6 and the patch cloth 29 are joined by the annular connecting portion 46 by suturing or the like. Similar to the cyclic connecting portion 42, the other cyclic connecting portion is also provided with a patch cloth.

A linear connecting portion 64 extending diagonally upward on the rear side of the vehicle is connected to the end portion of the linear connecting portion 63 extending rearward. The end of the rearward extension of the linear coupling portion 64 is connected to the annular coupling portion 45.

A branch point 70 is formed in the middle of the straight portion of the linear connecting portion 63. The linear joint portion 65 extends diagonally downward from the branch point 70 on the rear side of the vehicle, and the end portion of the extension is connected to the annular joint portion 43. The linear joint portion 66 extends obliquely upward from the annular joint portion 43 on the rear side of the vehicle, and the end portion of the extension is connected to the annular joint portion 44.

The expansion chamber 12 is formed in a region surrounded by the linear joint portions 63 to 66 and the annular joint portions 43 to 45. A gas passage portion 23 is formed between the cyclic coupling portion 44 and the cyclic coupling portion 45.

In FIG. 1, the annular coupling portion 46 is arranged on the vehicle rear side of the annular coupling portions 44 and 45 and the linear coupling portion 66. The linear coupling portion 67 extends from the annular coupling portion 46 to the upper side of the vehicle, extends counterclockwise, and is connected to the linear coupling portion 60 on the lower side. The annular connecting portions 44 to 46, the linear connecting portion 66 extending diagonally upward from the annular connecting portion 43 on the rear side of the vehicle, the linear connecting portion 67 extending from the annular connecting portion 46 to the upper side of the vehicle, and the lower side line. An expansion chamber 11 is formed in a region surrounded by the shape connecting portion 60. A gas passage portion 24 is formed between the annular coupling portion 46 and the linear coupling portion 60 on the lower side. An expansion chamber 15 is formed in a region surrounded by the linear joint portion 67 and the lower linear joint portion 60.

The expansion chamber 9 is formed in a region sandwiched between the linear coupling portion 67 forming the upper coupling portion of the expansion chamber 15 and the linear coupling portion 60 on the upper side.

In the region sandwiched between the linear joint portion 67 forming the posterior joint portion of the expansion chamber 15 and the linear joint portion 60 on the posterior side, the linear joint portions 68, 69, 71, 74 and the annular joint portion 47 to 50 are formed. The linear joints 68, 69, 71, 74 intersect with each other at an intersection located in a region overlapping or in the vicinity of the tie panel 3A in the front view in the X-axis direction. The linear joint portion 68 extends diagonally upward from the intersection on the front side of the vehicle, and the end portion of the extension is connected to the annular joint portion 47. The linear joint portion 69 extends diagonally downward on the front side of the vehicle from the intersection, and the end portion of the extension is connected to the annular joint portion 48. The linear joint portion 74 extends diagonally upward from the intersection on the rear side of the vehicle, and the end portion of the extension is connected to the annular joint portion 49. The linear joint portion 71 extends diagonally downward on the rear side of the vehicle from the intersection, and the end portion of the extension is connected to the annular joint portion 50.

The expansion chamber 16 is formed in a region surrounded by the linear joint portions 68 and 69 and the linear joint portion 67, and the expansion chamber 17 includes the linear joint portions 68 and 74 and the linear joint portion 60 on the upper side. It is formed in the area surrounded by. The expansion chamber 18 is formed in a region surrounded by the linear coupling portions 69 and 71 and the linear coupling portion 60 on the lower side, and the expansion chamber 19 is linear with the linear coupling portions 71 and 74 on the rear side. It is formed in a region surrounded by the connecting portion 60.

A tether 51 for connecting the curtain airbag main body 2 to the A pillar of the vehicle body extends from the front side portion of the curtain airbag main body 2. Further, a tether (not shown) for connecting the curtain airbag main body 2 to the C pillar of the vehicle body extends from the rear side portion of the curtain airbag main body 2. Further, a plurality of mounting pieces 53 (mounting pieces 53a to 53f in the case of FIG. 1) for connecting the curtain airbag main body 2 to the roof side rail of the vehicle body extend from the upper side portion of the curtain airbag main body 2. ..

The inflator 1 (gas generator) is inserted into the insertion portion 7 of the curtain airbag 101, and for example, the inflator 1 is attached by tightening a fastener such as a band on the outer circumference of the insertion portion 7. The inflator 1 is fixed to, for example, the roof side rail of an automobile.

Although not shown, the curtain airbag 101 is arranged along the roof side portion (the boundary portion between the ceiling surface and the side surface of the vehicle interior) in a state of being elongated in the front-rear direction. The front and rear tethers are connected to the A pillar and the C pillar, respectively, and the mounting pieces 53a to 53f are fixed to the roof side rail with fixing tools such as bolts and rivets. The folding body of the curtain airbag 101 is covered with a roof garnish.

When a vehicle equipped with the curtain airbag device 100 having such a configuration collides or rolls over, the inflator 1 operates, gas is supplied from the inflator 1 into the curtain airbag main body 2, and the curtain airbag main body 2 expands. To start. The curtain airbag 101 pushes open the roof garnish and deploys downward along the side surface of the vehicle interior.

At this time, the gas supplied from the inflator 1 into the curtain airbag main body 2 is divided into front and rear by the duct panel 4. The gas diverted forward causes the expansion chambers 8 and 10 to be sequentially expanded. A part of the gas that wraps around from the expansion chamber 8 to the expansion chamber 10 flows into the expansion chamber 13 from the gas passage portion 21, expands the expansion chamber 13, and then flows into the expansion chamber 14 from the gas passage portion 22 and flows into the expansion chamber 14. 14 is inflated. A part of the gas that wraps around from the expansion chamber 10 to the expansion chamber 11 flows into the expansion chamber 15 from the gas passage portion 24, and expands the expansion chamber 15. Further, a part of the gas that wraps around from the expansion chamber 10 to the expansion chamber 11 flows into the expansion chamber 12 from the gas passing portion 23, and expands the expansion chamber 12.

Since the vertical length of the tie panel 3 is shorter than the vertical length of the intermediate region 2a of the curtain airbag main body 2, when the expansion chambers 8 and 10 expand, the vicinity of the linear joint portion 63 is from the tie panel 3. The curtain airbag main body 2 expands so as to project toward the indoor side.

The gas that has been diverted rearward by the duct panel 4 flows along the upper side in the curtain airbag main body 2, expands the expansion chamber 9, and then sequentially expands the expansion chambers 16 to 19.

Here, as shown in FIG. 2, in the linear coupling portions 63 and 64 and the annular coupling portion 42, a plurality of virtual circles 73a and 73b having the same diameter arranged in the front-rear direction of the vehicle are all connected to the upper coupling portion of the expansion chamber 8. It is formed so as to be inscribed at at least two points of the lower joint. In the case of FIG. 2, the upper joint portion of the expansion chamber 8 is the linear joint portion 60 on the upper side, and the lower joint portion of the expansion chamber 8 is the linear joint portions 63 and 64. The virtual circles 73a and 73b are not circles that actually exist, but represent circles that can be drawn by design. These virtual circles may be inscribed in the sewing thread (solid line) of the joint portion, or may be inscribed in the boundary line (broken line) of the joint region by adhesion or the like. As described above, the expansion chamber 8 is formed so that a plurality of virtual circles 73a and 73b having the same diameter inscribed at at least two positions of the upper joint portion and the lower joint portion of the expansion chamber 8 are arranged in the front-rear direction of the vehicle. In this case, when the expansion chamber 8 expands, the width of the expansion chamber 8 in the X-axis direction approaches a constant value in the Y-axis direction.

Alternatively, as shown in FIG. 2, the linear coupling portions 63, 64 and the annular coupling portion 42 are formed so that the expansion chamber 8 has a plurality of locations having the same width W1 in a direction different from the vehicle front-rear direction. You may. In the case of FIG. 2, the straight portion of the linear coupling portion 63 has a plurality of portions having the same distance (width W1 in the vertical direction of the vehicle) from the upper coupling portion of the expansion chamber 8 over the Y-axis direction. More specifically, the linear coupling portion 63 has a linear portion parallel to the upper coupling portion of the expansion chamber 8 (in this case, the linear portion of the linear coupling portion 60 on the upper side). The width W1 may be the length between the sewing threads (solid lines) of the joint portion or the length between the boundary lines (broken lines) of the joint region due to adhesion or the like (the same applies to the width such as the width W2 described later). As described above, when the expansion chamber 8 has a plurality of locations having the same width W1 in a direction different from the vehicle front-rear direction, when the expansion chamber 8 expands, the width of the expansion chamber 8 in the X-axis direction extends in the Y-axis direction. Approaches constant.

FIG. 3 is a view showing the relationship between the occupant's head, the curtain airbag, and the frontal collision airbag in an upward view. The frontal collision airbag 90 corresponds to a driver airbag that expands and expands from the steering wheel if the occupant sits in the driver's seat, and an instrument in front of the passenger seat if the occupant sits in the passenger seat. It corresponds to a passenger airbag that expands and expands from the ment panel.

When the vehicle collides diagonally from the front, the occupant's head 91 is guided forward by the guide surface 8a on the vehicle interior side of the expansion chamber 8 of the expanded curtain airbag. At this time, as shown in FIG. 3, since the width of the expansion chamber 8 in the maximum expansion state in the X-axis direction is formed to be substantially constant over the Y-axis direction, the panels 5 and 6 are connected. A uniform guide surface 8a without an inner connecting portion is formed on the vehicle interior side of the expansion chamber 8. Therefore, the head 91, which is guided while contacting the guide surface 8a without the inner joint and moves to the front of the vehicle, is rotated around the Z axis as compared with the form of being guided by the guide surface with the inner joint. Since it is unlikely to occur, the rotation of the head 91 guided to the front of the vehicle can be suppressed.

Further, when the head 91 enters the recess formed by the front joint portion (in this case, the linear joint portion 61) of the expansion chamber 8, the head 91 tends to rotate around the Z axis. Therefore, the expansion chamber 8 brings the occupant's head 91 into contact with the front collision airbag 90 without reaching the front joint portion (in this case, the linear joint portion 61) of the expansion chamber 8. The head 91 is guided by the guide surface 8a having no inner joint portion that connects the six parts. As a result, the head 91 is received by the front collision airbag 90 before being guided by the guide surface 8a to the recess generated by the front joint portion, so that the rotation of the head 91 can be suppressed.

The thickness of the linear coupling portion 61 and the size of the surface 14a on the vehicle interior side are preferably formed so as not to hinder the deployment of the front collision airbag 90. For example, the thickness of the linear coupling portion 61 and the size of the surface 14a on the vehicle interior side do not allow the occupant's head 91 to reach the front coupling portion (in this case, the linear coupling portion 61) of the expansion chamber 8 and the front surface. It is preferably formed so as to be in contact with the collision airbag 90.

Further, in the form shown in FIG. 2, the linear coupling portions 64 and 65 have a plurality of branch couplings extending rearward from the branch point 70 so that the expansion chamber 12 is formed behind the expansion chamber 8 and the expansion chamber 10. It is a department. The expansion chamber 12 is an example of an intermediate expansion chamber provided in a region sandwiched between the linear coupling portions 64 and 65. By providing the expansion chamber 12, as shown in FIG. 4, the head 91 of the occupant can be sandwiched between the expansion chamber 8 and the expansion chamber 12 from the front and back, so that the rotation of the head 91 (particularly around the Z axis) Rotation) can be suppressed.

FIG. 4 is a view showing the curtain airbag that receives the head of the occupant from above. FIG. 5 is a front view showing a curtain airbag that receives the head of an occupant. When the head 91 comes into contact with the expansion chamber 8 after the vicinity of the linear coupling portions 63 and 64 protrudes from the tie panel 3 toward the indoor side due to the expansion of the expansion chambers 8 and 10, the vicinity of the linear coupling portions 63 and 64 becomes visible. By denting toward the tie panel 3, the head 91 is received by the expansion chamber 8. At this time, as shown in FIG. 4, the curtain airbag main body 2 is bent along the linear joint portion 64, so that the occupant's head 91 is sandwiched between the expansion chamber 12 and the expansion chamber 8 from the front and back. The rotation of the unit 91 (particularly, the rotation around the Z axis) can be suppressed. At this time, as shown in FIG. 5, the curtain airbag main body 2 is bent along the linear joint portion 64, so that the occupant's head 91 is sandwiched between the expansion chamber 8 and the expansion chamber 10 from above and below. Therefore, the rotation of the head 91 (particularly, the rotation around the Y axis) can be suppressed.

FIG. 6 is a partially enlarged front view of the indoor side of the curtain airbag according to the second embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or simplified by referring to the above-mentioned description. The curtain airbag 102 shown in FIG. 6 is different from the form shown in FIG. 2 in that a branch point 70 exists at a terminal portion on the rear side of the straight portion of the linear coupling portion 63.

Also in the form shown in FIG. 6, since the expansion chamber 8 has a plurality of locations having the same width W1 in a direction different from the vehicle front-rear direction, when the expansion chamber 8 expands, the width of the expansion chamber 8 in the X-axis direction becomes the Y-axis. Since it approaches constant in the direction, the rotation of the head 91 guided to the front of the vehicle can be suppressed. Further, although not particularly shown in FIG. 6, the rotation of the head 91 guided to the front of the vehicle can be suppressed by forming the expansion chamber 8 so that the virtual circles 73a and 73b similar to the above can be arranged.

FIG. 7 is a partially enlarged front view of the indoor side of the curtain airbag according to the third embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or abbreviated by referring to the above-mentioned description. The curtain airbag 103 shown in FIG. 7 is different from the form shown in FIG. 2 in that the linear coupling portion 63 includes a plurality of straight portions 63a and 63b having different linear directions.

In FIG. 7, the straight portion 63a is on the upper side so that the distance (width W1 in the vertical direction of the vehicle) from the upper joint portion (in this case, the linear joint portion 60 on the upper side side) of the expansion chamber 8 is constant. Extends parallel to the linear joint 60 of. The straight portion 63b is attached to the linear coupling portion 61 so that the distance (width W2 in the diagonal direction with respect to the vehicle vertical direction) from the upper coupling portion (in this case, the linear coupling portion 61) of the expansion chamber 8 is constant. On the other hand, it extends in parallel. By being formed in this way, when the expansion chamber 8 expands, the width of the expansion chamber 8 in the X-axis direction approaches a constant value in the Y-axis direction, so that the rotation of the head 91 guided to the front of the vehicle is suppressed. it can. Further, by forming the expansion chamber 8 so that the virtual circles 73a and 73b similar to the above can be arranged, the rotation of the head 91 guided to the front of the vehicle can be suppressed.

FIG. 8 is a partially enlarged front view of the indoor side of the curtain airbag according to the fourth embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or abbreviated by referring to the above-mentioned description. The curtain airbag 104 shown in FIG. 8 differs from the form shown in FIG. 2 in that the linear coupling portion 63 includes a straight portion 63a and a curved portion 63c.

In FIG. 8, the straight portion 63a has a constant distance (width W1 in the vertical direction of the vehicle) from the upper coupling portion of the expansion chamber 8 (in this case, the linear portion 60aa of the linear coupling portion 60 on the upper side). In addition, it extends parallel to the straight line portion 60aa. The curved portion 63c is a curved portion so that the distance (width W3 in the vertical direction of the vehicle) from the upper joint portion of the expansion chamber 8 (in this case, the curved portion 60ac of the linear joint portion 60 on the upper side side) is constant. It runs in parallel with 60ac. By being formed in this way, when the expansion chamber 8 expands, the width of the expansion chamber 8 in the X-axis direction approaches a constant value in the Y-axis direction, so that the rotation of the head 91 guided to the front of the vehicle is suppressed. it can. Further, by forming the expansion chamber 8 so that the virtual circles 73a and 73b similar to the above can be arranged, the rotation of the head 91 guided to the front of the vehicle can be suppressed. The width W1 and the width W3 are preferably the same, but may be different.

FIG. 9 is a partially enlarged front view of the indoor side of the curtain airbag according to the fifth embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or abbreviated by referring to the above-mentioned description. The curtain airbag 105 shown in FIG. 9 is different from the form shown in FIG. 2 in that the linear coupling portions 63 to 65 branch from the annular coupling portion 42. That is, the cyclic connecting portion 42 corresponds to the branch point.

FIG. 10 is a partially enlarged front view of the indoor side of the curtain airbag according to the sixth embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or abbreviated by referring to the above-mentioned description. The curtain airbag 106 shown in FIG. 10 is different from the form shown in FIG. 2 in that the linear coupling portion 65 branches from the branch point 70 on the linear coupling portion 64.

FIG. 11 is a partially enlarged front view of the indoor side of the curtain airbag according to the seventh embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or simplified by referring to the above-mentioned description. The curtain airbag 107 shown in FIG. 11 differs from the form shown in FIG. 2 in that the tie panel 3 is composed of a plurality of tie panels 3B and 3C. The number of tie panels arranged in the intermediate region 2a is not limited to two, and may be three or more. Further, the branch point 70 may exist in a region where the tie panel 3 does not exist (in the case of FIG. 11, a region sandwiched between the tie panel 3B and the tie panel 3C) in the front view in the X-axis direction.

FIG. 12 is a partially enlarged front view of the indoor side of the curtain airbag according to the eighth embodiment. The description of the same configuration and effect as in the above-described embodiment will be omitted or abbreviated by referring to the above-mentioned description. The curtain airbag 108 shown in FIG. 12 differs from the form shown in FIG. 2 in that the branch point 70 exists on the front side of the tie panel 3. The branch point 70 may be located behind the tie panel 3 in front view in the X-axis direction.

Also in the modes shown in FIGS. 9 to 12, since the expansion chamber 8 has a plurality of locations having the same width W1 in a direction different from the vehicle front-rear direction, when the expansion chamber 8 expands, the width of the expansion chamber 8 in the X-axis direction increases. Since it approaches a constant value in the Y-axis direction, the rotation of the head 91 guided to the front of the vehicle can be suppressed. Further, although not particularly shown in FIGS. 9 to 12, the rotation of the head 91 guided to the front of the vehicle is suppressed by forming the expansion chamber 8 so that the same virtual circles 73a and 73b as described above can be arranged. it can.

Although the curtain airbag and the curtain airbag device have been described above by the embodiment, the present invention is not limited to the above embodiment. Various modifications and improvements, such as combinations and substitutions with some or all of the other embodiments, are possible within the scope of the present invention.

For example, the width of the tie panel 3 in the vehicle front-rear direction may be wider than the width of the intermediate region 2a in the vehicle front-rear direction. For example, in FIG. 1, the tie panel may be a single panel in which the tie panel 3 and the tie panel 3A are integrated.

Further, the insertion portion 7 of the inflator 1 is not limited to the central portion of the curtain airbag main body 2 in the vehicle front-rear direction, and may be provided in the rear region of the upper side portion of the curtain airbag main body 2.

1 Inflator 2 Curtain airbag body 2a Intermediate area 3, 3A Tie panel 4 Duct panel 5 Inner panel 6 Outer panel 7 Insertion part 8 to 19 Expansion chamber 20 to 24 Gas passage part 29 Patch cloth 40 to 50 Circular joint 51 Tether 60 to 69,71,74 Linear joint 60a Upper joint 70 Branch point 73a, 73b Virtual circle 90 Frontal collision airbag 100 Curtain airbag device 101-108 Curtain airbag

Claims (9)

A curtain airbag that extends downward along the side of the vehicle interior.
The curtain airbag body, which is inflated by the gas from the inflator,
The curtain airbag body is arranged on the outdoor side in the intermediate region in the vehicle front-rear direction, and includes a tie panel connected to the upper part and the lower part of the curtain airbag body by an upper connecting portion and a lower connecting portion, respectively.
The curtain airbag main body has a first panel on the indoor side, a second panel on the outdoor side, and a joint portion for connecting the first panel and the second panel.
The joint has a peripheral joint along the peripheral edges of the first panel and the second panel, and an inner joint located inside the peripheral joint.
The length from the upper connecting portion to the lower connecting portion of the tie panel is shorter than the length from the upper connecting portion to the lower connecting portion of the curtain airbag body.
As part of the inner coupling portion, there is an intermediate coupling portion that partitions the intermediate region into a plurality of expansion chambers including at least an upper expansion chamber and a lower expansion chamber.
A curtain airbag in which a plurality of virtual circles having the same diameter arranged in the front-rear direction of the vehicle are inscribed at at least two positions, an upper joint portion and a lower joint portion of the upper expansion chamber. A curtain airbag that extends downward along the side of the vehicle interior.
The curtain airbag body, which is inflated by the gas from the inflator,
The curtain airbag body is arranged on the outdoor side in the intermediate region in the vehicle front-rear direction, and includes a tie panel connected to the upper part and the lower part of the curtain airbag body by an upper connecting portion and a lower connecting portion, respectively.
The curtain airbag main body has a first panel on the indoor side, a second panel on the outdoor side, and a joint portion for connecting the first panel and the second panel.
The joint has a peripheral joint along the peripheral edges of the first panel and the second panel, and an inner joint located inside the peripheral joint.
The length from the upper connecting portion to the lower connecting portion of the tie panel is shorter than the length from the upper connecting portion to the lower connecting portion of the curtain airbag main body.
As part of the inner coupling portion, there is an intermediate coupling portion that partitions the intermediate region into a plurality of expansion chambers including at least an upper expansion chamber and a lower expansion chamber.
The upper expansion chamber is a curtain airbag having a plurality of portions having the same width in a direction different from the vehicle front-rear direction. The curtain airbag according to claim 1 or 2, wherein the intermediate coupling portion has a plurality of portions having the same distance from the upper coupling portion of the upper expansion chamber. The curtain airbag according to any one of claims 1 to 3, wherein the intermediate coupling portion has a portion parallel to the upper coupling portion of the upper expansion chamber. Any of claims 1 to 4, wherein the intermediate coupling portion includes a plurality of branch coupling portions extending rearward from the branch point so that the intermediate expansion chamber is formed behind the upper expansion chamber and the lower expansion chamber. The curtain airbag described in one item. The curtain airbag according to claim 5, wherein the intermediate expansion chamber is provided between the plurality of branch joints. The upper expansion chamber guides the head with a guide surface without the inner coupling portion so that the occupant's head comes into contact with the front collision airbag without reaching the front joint portion of the upper expansion chamber. , The curtain airbag according to any one of claims 1 to 6. A curtain airbag that extends downward along the side of the vehicle interior.
The curtain airbag body, which is inflated by the gas from the inflator,
The curtain airbag body is arranged on the outdoor side in the intermediate region in the vehicle front-rear direction, and includes a tie panel connected to the upper part and the lower part of the curtain airbag body by an upper connecting portion and a lower connecting portion, respectively.
The curtain airbag main body has a first panel on the indoor side, a second panel on the outdoor side, and a joint portion for connecting the first panel and the second panel.
The joint has a peripheral joint along the peripheral edges of the first panel and the second panel, and an inner joint located inside the peripheral joint.
The length from the upper connecting portion to the lower connecting portion of the tie panel is shorter than the length from the upper connecting portion to the lower connecting portion of the curtain airbag body.
As part of the inner coupling portion, there is an intermediate coupling portion that partitions the intermediate region into a plurality of expansion chambers including at least an upper expansion chamber and a lower expansion chamber.
The upper expansion chamber guides the head with a guide surface without the inner coupling portion so that the occupant's head comes into contact with the front collision airbag without reaching the front joint portion of the upper expansion chamber. , Curtain airbag. A curtain airbag device comprising the curtain airbag according to any one of claims 1 to 8 and the inflator.