阅读说明：本技术 乘员约束装置 (Occupant restraint device ) 是由 斋藤博之 松下彻也 于 2018-11-28 设计创作，主要内容包括：本发明更有效地限制在车辆发生碰撞时等膨胀展开状态下的气囊的移动,从而提高气囊的乘员约束性能。本发明的乘员约束装置的特征在于,具备气囊和张力布,并构成为,张力布通过气囊的膨胀展开而向座椅的外部展开,并从座椅靠背部的上面被张设至座垫部,从膨胀展开时的气囊上方俯视时,在由第一虚拟线和第二虚拟线所划分的四个区域中,张力布至少通过第一虚拟线的与乘员相反的一侧且第二虚拟线的车辆前方侧的区域,其中,所述第一虚拟线为在左右方向平行的直线上穿过气囊宽度最长的部分的中心沿车辆前后方向延伸,所述第二虚拟线为与第一虚拟线正交,在气囊前后长度上通过该第一虚拟线的中心沿左右方向延伸。(The present invention more effectively restricts the movement of an airbag in an inflated and deployed state such as when a vehicle is involved in a collision, thereby improving the occupant restraining performance of the airbag. The occupant restraint device according to the present invention is characterized by comprising an airbag and a tension cloth, wherein the tension cloth is deployed to the outside of the seat by inflation and deployment of the airbag, is stretched from the upper surface of the seatback portion to the cushion portion, and passes through at least a region on the opposite side of a first virtual line extending in the vehicle longitudinal direction through the center of a portion where the airbag width is longest on a straight line parallel to the lateral direction and a region on the vehicle front side of a second virtual line orthogonal to the first virtual line extending in the vehicle longitudinal direction through the center of the first virtual line, among four regions divided by the first virtual line and the second virtual line when viewed in a plan view from above the airbag during inflation and deployment.)

1. An occupant restraint device that restrains an occupant seated on a vehicle seat,

the occupant restraint device is characterized by comprising:

at least one airbag, at least a part of which is housed in a seatback portion of the seat and which is inflated and deployed to a side of an occupant seated in the seat;

one or more tension cloths that are accommodated from a seatback portion to a cushion portion of the seat via a side surface of the airbag on a side opposite to the occupant,

and the tension cloth is configured to be deployed to the outside of the seat by the inflation and deployment of the airbag, and is stretched from the upper surface of the seatback portion to the cushion portion,

the tension cloth passes through at least a region on a side opposite to the occupant of the first virtual line extending in a vehicle front-rear direction through a center of a portion where an airbag width is longest on a straight line parallel to the left-right direction, and on a vehicle front side of the second virtual line extending in the left-right direction through the center of the first virtual line on the airbag front-rear length, in four regions divided by the first virtual line and the second virtual line, when viewed from above the airbag during inflation and deployment.

2. An occupant restraint device that restrains an occupant seated on a vehicle seat,

the occupant restraint device is characterized by comprising:

at least one airbag, at least a part of which is housed in a seatback portion of the seat and which inflates and deploys to a side of an occupant seated in the seat;

one or more tension cloths that are accommodated from a seatback portion to a cushion portion of the seat via a side surface of the airbag on a side opposite to the occupant,

and the tension cloth is configured to be deployed to the outside of the seat by the inflation and deployment of the airbag, and is stretched from the upper surface of the seatback portion to the cushion portion,

the tension cloth passes through at least a region on a side opposite to the occupant of the first virtual line extending in a vehicle front-rear direction through a center of gravity in a plan view and on a vehicle front side of the second virtual line orthogonal to the first virtual line and extending in a left-right direction, among four regions divided by the first virtual line and the second virtual line when viewed from above the airbag during inflation and deployment.

3. The occupant restraint apparatus according to claim 1 or 2, wherein an installation position of the seatback portion upper surface of the tension cloth is near an inner side of a shoulder portion of the occupant in a left-right direction.

4. The occupant restraint apparatus according to any one of claims 1 to 3, wherein the tension cloth is deployed to the outside of the seat by a skin of the seat being cracked when the airbag is inflated and deployed.

5. The occupant restraint apparatus according to any one of claims 1 to 3, wherein at least a part of the tension cloth is housed in a case provided on the seat side, and is deployed from the case to the outside of the seat when the airbag is inflated and deployed.

6. The occupant restraint apparatus according to claim 1 or 2, wherein the width of the tension cloth is widened as going from the seatback portion toward the cushion portion.

7. The occupant restraint apparatus according to any one of claims 1 to 3, wherein a plurality of the tension cloths are provided.

8. The occupant restraint apparatus according to any one of claims 1 to 4, wherein a region of the tension cloth on a side of the first virtual line opposite to the occupant and on a vehicle front side of the second virtual line, as viewed from above the airbag at the time of inflation and deployment, intersects with a contour line of the airbag.

9. The occupant restraint apparatus according to any one of claims 1 to 8, wherein the one or more airbags are provided on both sides of the seat, and are constituted by a pair of airbags that inflate and deploy to the left and right of an occupant seated in the seat.

10. The occupant restraint apparatus according to claim 9,

the occupant restraint device further includes a biasing mechanism which is embedded in the seat back portion and biases one of the pair of airbags toward the occupant,

the force application mechanism comprises:

a shaft disposed at a position corresponding to a shoulder of the occupant on the one airbag side in the seatback portion and slidable in a left-right direction on the seatback portion;

a tether connected to the airbag on an opposite side of the one airbag and the shaft,

the tension cloth is fixed to the seatback at a position inside the shaft in the left-right direction,

when the pair of air bags are inflated and deployed,

the tension cloth is deployed to the outside of the seat and is stretched from the vicinity of the inside of the shoulder of the occupant in the left-right direction on the upper surface of the seatback to the cushion part,

when the pair of airbags are inflated and deployed and the tether is deployed to the outside of the seat, the tether is pulled by the airbag on the other side, and the shaft moves to a position corresponding to the other shoulder of the occupant in the seatback, so that the tension cloth is pulled by the shaft and the airbag is biased toward the occupant.

11. The occupant restraint apparatus according to claim 9,

the occupant restraint device further includes a biasing mechanism which is embedded in the seat back portion and biases one of the pair of airbags toward the occupant,

the force application mechanism comprises:

an annular slip ring which is disposed at a position corresponding to a shoulder of the occupant on the one airbag side in the seatback, is inserted with the tension cloth, and is movable forward;

a tether connected to the air bag and the slip ring on opposite sides of the one air bag,

the tension cloth is inserted through the slip ring and then fixed on the seat back,

when the pair of air bags is inflated and deployed,

the tension cloth is deployed to the outside of the seat and is stretched from the vicinity of the inside of the shoulder of the occupant in the left-right direction on the upper surface of the seatback part to the cushion part,

when the pair of airbags are inflated and deployed, the tether and the slip ring are exposed to the outside of the seat, the tether is pulled by the airbag on the opposite side and the slip ring moves forward, the slip ring moves away from the position where the tension cloth is fixed in the seatback, and the tension cloth is pulled and the airbag is biased toward the occupant.

12. The occupant restraint apparatus according to claim 10 or 11, wherein the tension cloth and the urging mechanism are provided on both of the pair of airbags.

13. The occupant restraint apparatus according to claim 11, wherein the tension cloth and the urging mechanism are provided on both of the pair of airbags,

and the slip ring to which the urging mechanisms provided in both the pair of slip rings are connected.

14. The occupant restraint apparatus according to any one of claims 1 to 13, wherein an intermediate portion of the tension cloth that is forward of a center of the longitudinal length of the tension cloth when viewed from above the airbag at the time of inflation and deployment is connected to the airbag.

15. The occupant restraint device according to any one of claims 1 or 2, further comprising an urging mechanism that is embedded inside the seatback portion and urges the airbag toward the occupant side,

the force application mechanism comprises a coiler which is connected with one end of the tension cloth and coils the tension cloth,

when the airbag is inflated and deployed, the tension cloth is retracted by the retractor, and the airbag is biased toward the occupant side.

16. The occupant restraint apparatus according to claim 15,

the tension cloth comprises a first tension cloth and a second tension cloth,

the first tension cloth passes from an upper portion of the seat back through a region on a side of at least a first virtual line on the airbag opposite to the occupant and on a vehicle front side of the second virtual line,

the second tension cloth is connected to the seat cushion through the airbag upper portion at a position rearward of the first tension cloth,

the urging mechanism further includes a direction changing portion that changes a direction in which the first tension cloth and the second tension cloth are drawn in from the retractor to the airbag.

17. The occupant restraint apparatus according to claim 1 or 2,

the occupant restraint device further includes a biasing mechanism which is embedded in the seat back portion and biases the airbag toward the occupant,

the force application mechanism comprises:

a direction changing unit that is movable between any one of end portions of the seatback in the left-right direction and a center thereof;

a pretensioner mechanism that pulls the direction changing portion toward a center side in the left-right direction when the airbag is inflated and deployed,

the tension cloth reaches the airbag from either end portion in the left-right direction of the seatback portion via the direction changing portion,

when the airbag is inflated and deployed, the pretensioner mechanism pulls the direction changing portion, and the airbag is biased toward the occupant by the tension cloth.

18. The occupant restraint apparatus according to claim 1 or 2,

the occupant restraint device further includes a biasing mechanism which is embedded in the seat back portion and biases the airbag toward the occupant,

the force application mechanism comprises:

a first direction changing unit that is movable between a position near a center of the seatback and either one of end portions in a left-right direction;

a second direction changing unit disposed on a front side of the first direction changing unit in a center of the seatback in a lateral direction;

a pushing mechanism for pushing the first direction changing portion to either one of left and right end portions of the seatback portion when the airbag is inflated and deployed,

the tension cloth reaches the airbag from the center of the seatback in the left-right direction via the first direction changing portion and the second direction changing portion,

when the airbag is inflated and deployed, the pushing mechanism pushes out the first direction changing portion, and the airbag is biased toward the occupant side by the tension cloth.

19. The occupant restraint apparatus according to any one of claims 15-18,

the first tension cloth and the second tension cloth are arranged to converge between from the retractor to the airbag.

20. The occupant restraint apparatus according to any one of claims 15, 17 and 18,

the tension cloth comprises a first tension cloth, a second tension cloth and a third tension cloth,

the first tension cloth is deployed to the outside of the seat by inflation and deployment of the airbag, and is stretched from an upper surface of the seatback part to a region on a side of the first virtual line of the airbag opposite to the occupant and on a vehicle front side of the second virtual line,

the second tension cloth is inclined forward as it goes downward from an end portion of the first tension cloth on the airbag and is stretched over the cushion portion,

the third tension cloth is inclined rearward from an end portion of the first tension cloth on the airbag toward a lower side, and is stretched to the cushion portion.

21. The occupant restraint apparatus according to any one of claims 15, 17 and 18,

the tension cloth comprises a first tension cloth and a second tension cloth,

the first tension cloth is deployed to the outside of the seat by inflation and deployment of the airbag, and is stretched from an upper surface of the seatback part to a region on a side of the first virtual line of the airbag opposite to the occupant and on a vehicle front side of the second virtual line,

the second tension cloth is a planar member that widens downward from an end portion of the first tension cloth on the airbag, and is stretched to the cushion portion.

Technical Field

The present invention relates to an occupant restraint device that restrains an occupant seated in a vehicle seat.

Background

Vehicles in recent years are basically equipped with an airbag device. An airbag device is a safety device that operates in an emergency such as a vehicle collision, and is inflated and deployed by gas pressure to catch and protect an occupant. The airbag device is variously classified according to the installation position and the use. For example, in the occupant protection device of patent document 1, side airbags that inflate and deploy toward both sides of an occupant are provided at side portions on both sides of a seat. According to patent document 1, it is possible to restrict movement to the opposite collision side (the other side in the vehicle width direction) due to rebound of movement to the collision side (one side in the vehicle width direction) at the time of collision or the like.

Disclosure of Invention

Problems to be solved by the invention

As shown in patent document 1, in an airbag device that laterally receives an occupant, if the airbag moves in a direction away from the occupant in the vehicle width direction, the performance of restraining the occupant is degraded. Therefore, in patent document 1, a tension cloth device is provided at a side portion of the inner bag on the inner side in the vehicle width direction. The tension cloth device of patent document 1 has a tension cloth as a side unwinding member and a spring bar structure as an unwinding means.

According to the structure of patent document 1, the inner bag can be restrained from moving in the vehicle width direction by being supported by the tension cloth provided at the inner side portion in the vehicle width direction. Therefore, the movement of the occupant toward the inside in the vehicle width direction is restricted. However, in the structure of patent document 1, only the side surface of the inner bag is supported by the tension cloth. Therefore, the movement of the airbag in the vehicle front-rear direction cannot be restricted. Therefore, there is a need for improvement in the occupant protection device of patent document 1.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an occupant restraint device capable of more effectively restricting the movement of an airbag in an inflated and expanded state such as at the time of a vehicle collision, and improving the occupant restraint performance of the airbag.

Means for solving the problems

In order to solve the above problem, a typical configuration of an occupant restraint device according to the present invention is an occupant restraint device that restrains an occupant seated in a vehicle seat, the occupant restraint device including: at least one airbag, at least a part of which is housed in a seatback of a seat and is inflated and deployed to the side of an occupant seated in the seat; one or more tension cloths which are accommodated from the seat back part to the cushion part of the seat through the side surface of the airbag opposite to the passenger, and the tension cloth is configured to be expanded to the outside of the seat by the expansion and the expansion of the airbag and is stretched from the upper surface of the backrest part to the cushion part, when viewed from above the airbag during the expansion and the expansion, a tension cloth passing through at least an area on a side of the first virtual line opposite to the occupant and on a vehicle front side of the second virtual line among four areas divided by the first virtual line and the second virtual line, wherein the first virtual line extends in the vehicle front-rear direction on a straight line parallel in the left-right direction passing through the center of the portion where the airbag width is longest, the second virtual line is orthogonal to the first virtual line, and extends in the left-right direction through the center of the first virtual line in the front-rear length of the airbag.

In the above configuration, since the airbag inflates and deploys at the time of a vehicle collision, the tension cloth is deployed to the outside of the seat. Thereby, the tension cloth is stretched to the side surface of the cushion part along the side surface of the airbag on the side opposite to the occupant. The tension cloth that is deployed to the outside of the seat passes through a region on the side of the first virtual line of the airbag opposite to the occupant and on the vehicle front side of the second virtual line. Thus, the tension cloth is mounted on the airbag obliquely in a direction away from the occupant as it goes toward the front of the vehicle when viewed from above. The surface of the airbag opposite to the occupant and the front side are held by the tension cloths. Therefore, the movement in the direction away from the occupant and the movement in the forward direction can be restricted, and the occupant restraining performance of the airbag can be improved.

In order to solve the above problem, another configuration of an occupant restraint device according to the present invention is an occupant restraint device for restraining an occupant seated in a vehicle seat, the occupant restraint device including: at least one airbag, at least a part of which is housed in a seatback of a seat and is inflated and deployed to the side of an occupant seated in the seat; and one or more tension cloths which are accommodated from the seat back part to the cushion part of the seat through the side surface of the airbag opposite to the passenger. The tension cloth is configured to be deployed to the outside of the seat by inflation and deployment of the airbag and to be stretched from the upper surface of the seatback portion to the cushion portion, and the tension cloth passes through at least a region on the side opposite to the occupant of a first virtual line extending in the vehicle front-rear direction through the center of gravity in a planar figure and a region on the vehicle front side of a second virtual line orthogonal to the first virtual line and extending in the left-right direction, out of four regions divided by the first virtual line and the second virtual line when viewed from above the airbag during inflation and deployment.

In the above structure, the first virtual line is a line segment passing through the center of the figure in a plan view from above the airbag. Even with such a configuration, the same effects as described above can be obtained by the tension cloth deployed to the outside of the seat passing through the region of the airbag on the side opposite to the occupant on the first virtual line and on the vehicle front side on the second virtual line.

The attachment position of the tension cloth to the upper surface of the seatback portion may be near the inside of the shoulders of the occupant in the lateral direction. Thereby, a force in a direction approaching the occupant side by the tension cloth is applied to the airbag in the vicinity of the shoulder of the occupant. Therefore, the movement of the airbag in the direction away from the occupant can be more effectively suppressed.

The tension cloth can be unfolded to the outside of the seat through the skin cracking of the seat when the airbag is expanded and unfolded. Alternatively, at least a part of the tension cloth may be housed in a case provided on a seat side, and the tension cloth may be deployed from the case to the outside of the seat when the airbag is inflated and deployed. In any of the above configurations, the above effects can be obtained satisfactorily.

The width of the tension cloth may be widened as going from the seatback portion toward the cushion portion. According to this structure, the tension cloth can hold the airbag over a wider area. Therefore, the movement of the airbag can be more reliably restricted, and the above-described effect can be improved.

A plurality of the tension cloths may be provided. This increases the number of places where the airbag is held by the tension cloth. Therefore, the movement of the airbag can be more reliably restricted, and the above-described effect can be improved.

The tension cloth viewed from above the airbag during inflation and deployment may intersect the contour line of the airbag at a region on the side of the first virtual line opposite to the occupant and on the vehicle front side of the second virtual line. With this configuration, even when the tension cloth is deployed, the above-described effect can be obtained when the tension cloth intersects the contour line of the region on the occupant side of the first virtual line and on the vehicle front side of the second virtual line.

The one or more airbags may be provided on both sides of the seat and may be configured by a pair of airbags that inflate and deploy to the left and right of an occupant seated in the seat. Thus, the left and right sides of the occupant can be restrained by the airbag, and higher occupant restraining performance can be obtained.

Preferably, the occupant restraint system further includes a biasing mechanism which is embedded in the seat back portion and biases one of the pair of airbags toward the occupant, the biasing mechanism including: a shaft which is disposed at a position corresponding to a shoulder of an occupant on one airbag side of the seatback and is slidable in a left-right direction in the seatback; and a tether connected to the airbag and the shaft on the opposite side of the one airbag, wherein the tension cloth is fixed to the seat back portion at a position inside the shaft in the left-right direction, the tension cloth is deployed to the outside of the seat when the pair of airbags are inflated and deployed, the tension cloth is stretched to the seat cushion portion from the vicinity of the inside of the shoulder of the occupant in the left-right direction on the upper surface of the seat back portion, and when the tether is deployed to the outside of the seat when the pair of airbags are inflated and deployed, the tether is pulled by the airbag on the other side, and the shaft moves to a position corresponding to the other shoulder of the occupant on the seat back portion, whereby the tension cloth is pulled.

According to the above configuration, one airbag provided with the apparatus is urged toward the occupant by the urging mechanism. This can improve the effect of suppressing the movement of the airbag in the left-right direction by the tension cloth. Therefore, the occupant restraining performance of the airbag can be further improved.

The occupant restraint system further includes a biasing mechanism which is embedded in the seat back portion and biases one of the pair of airbags to the occupant side, and the biasing mechanism includes: an annular slide ring which is disposed at a position corresponding to a shoulder of an occupant on one airbag side in the seat back portion, is inserted with a tension cloth, and is movable forward; and a tether connected to the air bag and the slip ring on the opposite side of the one air bag, the tension cloth being fixed to the seat back portion after being inserted through the slip ring, the tension cloth being deployed to the outside of the seat when the pair of air bags are expanded and deployed, the tension cloth being stretched to the cushion portion from the vicinity of the inner side of the shoulder of the occupant in the left-right direction on the upper surface of the seat back portion, the tether and the slip ring being exposed to the outside of the seat when the pair of air bags are expanded and deployed, the tether being pulled by the air bag on the other side, and the slip ring being moved forward, the slip ring being moved away from the position where the tension cloth is fixed in the seat.

With this configuration, the same effect as that of the above-described biasing mechanism can be obtained in which one airbag is biased toward the occupant. Therefore, the occupant restraining performance of the airbag can be further improved.

The tension cloth and the urging mechanism may be provided on both of the pair of airbags. According to the above configuration, the effect of the urging mechanism can be obtained in both of the pair of airbags. Therefore, the occupant restraining performance can be further improved.

The tension cloth and the urging mechanism are provided on both of the pair of airbags, and slip rings of the urging mechanisms provided on both of them may be connected. This allows the urging mechanisms provided for the pair of airbags to be interlocked with each other.

The tension cloth may be connected to the airbag at an intermediate portion of the tension cloth located forward of a center of the longitudinal length of the airbag when viewed from above the airbag during inflation and deployment. Thus, the tension cloth can receive the airbag at the time of inflation and deployment with good balance in the front-rear direction. Therefore, the above-described effects can be stably obtained.

The occupant restraint device further includes a biasing mechanism which is embedded in the seat back portion and biases one of the pair of airbags toward the occupant, wherein the biasing mechanism includes a retractor which is connected to one end of the tension cloth and which winds up the tension cloth, and when the airbag is expanded and deployed, the airbag can be biased toward the occupant by the tension cloth being wound up by the retractor. As an example of the retractor, a similar structure known as a general belt retractor in which a main shaft of the retractor is rapidly rotated by an electric motor or gas pressure of a gas generating device such as a micro gas generator may be used.

According to the above configuration, the same effect of biasing the airbag toward the occupant as the above biasing mechanism can be obtained. Therefore, the occupant restraining performance of the airbag can be further improved. In the above configuration, even when only one airbag is provided instead of the pair of airbags, the airbag can be biased toward the occupant.

The above-mentioned tension cloths include a first tension cloth passing through at least a side of the first virtual line on the airbag opposite to the occupant from an upper portion of the seat back and a region of the second virtual line on the vehicle front side, and a second tension cloth passing through the upper portion of the airbag and connected to the seat cushion at a rear side of the first tension cloth, and the urging mechanism may further include a direction changing portion changing a direction in which the first tension cloth and the second tension cloth are drawn in from the retractor to the airbag.

According to the above configuration, in the configuration in which the two tension cloths are provided, the two tension cloths join and gather at the direction changing portion when the airbag inflates and deploys. The concentrated tension cloth is supported by the direction changing portion in the middle of the retractor to change the drawing direction, and is wound on the retractor. Thus, the two tension cloths are wound around the retractor without being entangled with each other, and therefore, even in a configuration in which two tension cloths are provided, the above-described effects can be stably obtained.

The direction changing portion may be a rod-like shape such as a pin, an elongated slot-like opening provided in the upper portion of the seat back, or an elliptical or circular opening. In any case, any member may be used as long as the pulling direction of the tension cloth can be relatively changed.

The occupant restraint system further includes a biasing mechanism which is embedded in the seat back portion and biases the airbag toward the occupant, the biasing mechanism including: a direction changing unit which is movable between any one end of the seat back unit in the left-right direction and the center thereof; and a pretensioner mechanism that pulls the direction changing portion toward a center side in the left-right direction when the airbag is inflated and deployed, and that pulls the direction changing portion from either end portion in the left-right direction of the seatback portion to the airbag through the direction changing portion.

In the structure of the present invention, the airbag can be biased toward the occupant in the same manner as the biasing mechanism described above. Therefore, the occupant restraining performance of the airbag can be further improved. In this configuration, when only one airbag is provided, the airbag can be biased toward the occupant.

Further, as an example of the pretensioner, a similar structure of a buckle pretensioner such as a wire which is pulled rapidly by moving a piston in a cylinder by a micro gas generator can be used. The direction changing portion may be, for example, a rod-like shape such as a shaft or a pin, or may be an opening portion of a movable elongated groove provided in the upper portion of the seat back, or may be an opening portion of an elliptical shape or a circular shape. In any case, any member may be used as long as the pulling direction of the tension cloth can be relatively changed.

The occupant restraint system further includes a biasing mechanism which is embedded in the seat back portion and biases the airbag toward the occupant, the biasing mechanism including: a first direction changing unit that is movable between a position near a center of the seatback and either one of end portions in a left-right direction; a second direction changing unit disposed on a front side of the first direction changing unit in a center of the seatback in the lateral direction; and a pushing mechanism for pushing the first direction changing portion to either one of left and right end portions of the seatback portion when the airbag is inflated and deployed, wherein the tension cloth reaches the airbag from a center of the seatback portion in a left-right direction through the first direction changing portion and the second direction changing portion, and the pushing mechanism pushes the first direction changing portion out when the airbag is inflated and deployed, so that the airbag is biased toward an occupant side by the tension cloth.

In such a configuration, the effect of urging the airbag toward the occupant by the urging mechanism can also be obtained, and therefore, the occupant restraining performance of the airbag can be further improved. In addition, in such a configuration, when only one airbag is provided, an effect of biasing the airbag toward the occupant can be obtained.

As an example of the above-described pushing mechanism, a similar pushing mechanism that pushes out a piston in a cylinder by a micro gas generator, for example, may be used. The first direction changing portion and the second direction changing portion may be formed in a rod shape such as a movable shaft or a pin, may be formed in a movable elongated groove-like opening provided in the upper portion of the seat back, or may be formed in an elliptical or circular opening, as long as the pull-in direction of the tension cloth can be changed. In any case, any member may be used as long as the pulling direction of the tension cloth can be relatively changed.

The first tension cloth and the second tension cloth may be arranged to converge between the retractor and the airbag. Thus, the first tension cloth and the second tension cloth can be wound in the retractor without being entangled with each other.

The tension cloth includes a first tension cloth, a second tension cloth, and a third tension cloth, the first tension cloth is deployed to the outside of the seat by expansion of the airbag, and is stretched from the upper surface of the seatback portion to a region on the occupant side of the first virtual line of the airbag and on the vehicle front side of the second virtual line. The second tension cloth is inclined forward as it goes downward from the end on the airbag of the first tension cloth, and is stretched over the cushion part. The third tension cloth is inclined rearward from the end portion of the first tension cloth on the airbag toward the lower side, and is stretched to the cushion portion. That is, the path of the tension cloth on the airbag is divided into two paths. This allows the airbag to receive the airbag at the time of inflation and deployment in a well-balanced manner in the front-rear direction, and therefore the above-described effects can be stably obtained.

The tension cloth includes a first tension cloth that is deployed to the outside of the seat by inflation and deployment of the airbag, and a second tension cloth that is deployed from the upper surface of the seatback portion to a region of the airbag on the side opposite to the occupant on the first virtual line and on the vehicle front side of the second virtual line. The second tension cloth is a planar member whose width is widened downward from an end portion of the first tension cloth on the airbag, and is provided so as to be capable of being stretched over the cushion portion.

In this way, since the second tension cloth is a planar member, the tension cloth can receive the airbag at the time of inflation and deployment over a larger area. Therefore, the effect of the airbag on the force applied to the occupant can be improved by the tension cloth.

Effects of the invention

The present invention has an object to provide an occupant restraint device capable of more effectively restricting the movement of an airbag in an inflated and expanded state such as at the time of a vehicle collision, and improving the occupant restraint performance of the airbag.

Drawings

Fig. 1 is a diagram illustrating an occupant restraint system according to a first embodiment.

Fig. 2 is a diagram illustrating a state in which a passenger is seated on the seat of fig. 1.

Fig. 3 is a diagram illustrating another example of the occupant restraint system according to the first embodiment.

Fig. 4 is a diagram illustrating an occupant restraint system according to a second embodiment.

Fig. 5 is a diagram illustrating deformation of a tension cloth that can be applied to the first embodiment of fig. 1 or the second embodiment of fig. 2.

Fig. 6 is a diagram illustrating deformation of the air bladder.

Fig. 7 is a diagram illustrating an occupant restraint system according to a third embodiment.

Fig. 8 is a diagram illustrating an occupant restraint system according to a fourth embodiment.

Fig. 9 is a diagram illustrating an occupant restraint system according to a fifth embodiment.

Fig. 10 is a diagram illustrating an occupant restraint system according to a sixth embodiment.

Fig. 11 is a diagram illustrating an occupant restraint system according to a seventh embodiment.

Fig. 12 is a diagram illustrating an occupant restraint device according to an eighth embodiment.

Fig. 13 is a diagram exemplifying deformation of the tension cloth.

Fig. 14 is a diagram exemplifying deformation of the tension cloth.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Dimensions, materials, other specific numerical values, and the like shown in the embodiments are merely examples for facilitating understanding of the present invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are given the same reference numerals to omit duplicated explanation, and elements not directly related to the present invention are omitted from illustration.

In the present embodiment, when the occupant is seated in the regular posture, the direction in which the occupant faces is referred to as the front, and the opposite direction is referred to as the rear.

(embodiment I)

Fig. 1 is a diagram illustrating an occupant restraint system 100 according to a first embodiment. For convenience of understanding, in fig. 1, the airbags 120a and 120b and the left and right tension cloths 130a and 130b, which will be described later, are illustrated as virtual lines. Fig. 1 also shows the airbags 120a and 120b, the left tension cloth 130a, and the right tension cloth 130b during non-inflation and deployment.