JP5871475B2 - Crew protection device - Google Patents

Description

  The present invention relates to an occupant protection device for protecting an occupant from an impact force at the time of a vehicle collision.

  Conventionally, as this type of occupant protection device, an airbag that extends along the seat belt is provided between the seat belt and the occupant, and when an impact force acts on the vehicle such as a vehicle collision, the seat belt and the occupant Air bags are deployed between the seat belts to protect the occupant's lower back, and the space between the seat belt and the occupant is instantaneously increased to increase the restraint force of the occupant by the seat belt. (For example, refer to Patent Document 1).

JP 2004-330903 A

As the occupant protection device, in addition to deploying the airbag as in the occupant protection device, the airbag to be deployed is brought into contact with the side surface portion of the occupant seated on the seat to move the occupant toward the center in the vehicle width direction. In order to protect the occupant from the impact force, it is considered. In the occupant protection device, if the occupant's restraining force by the seat belt is increased after the occupant is moved toward the center in the vehicle width direction , the safety can be further improved. However, in the occupant protection device, the airbag can be deployed between the seat belt and the occupant along the seat belt, but the occupant seated on the seat cannot be moved toward the center in the vehicle width direction. In the occupant protection device, for example, the space between the seat belt and the occupant is partially different, such as on the front side and the side surface of the occupant. For this reason, when the airbag is deployed, the airbag may be caught where the space between the seat belt and the occupant becomes small, and the airbag may not be deployed along the seat belt.

  An object of the present invention is to allow the airbag to be deployed between the seat belt and the passenger along the seat belt, and to move the passenger seated on the seat toward the center in the vehicle width direction. The object is to provide an occupant protection device.

In order to achieve the above object, the present invention provides an occupant protection device including an airbag that extends between a seat belt and an occupant along the seat belt, wherein the airbag is a vehicle in the vehicle width direction of the seat. On the outside, a first deployment portion that develops in a direction other than the vehicle width direction center portion side of the vehicle, a second deployment portion that develops toward the vehicle width direction center portion side of the vehicle, a first deployment portion, and a second deployment And a bending portion that bends so as to change a direction in which the second deployment portion is deployed with respect to a direction in which the first deployment portion is deployed. The second deployment part is deployed at the side surface of the body, the second deployment part is deployed at the front part of the occupant's body, and the second deployment part is deployed at a later timing than the first deployment part is deployed. ing.

  As a result, the direction in which the airbag is deployed is changed to the target direction by the bent portion, so that the occupant seated on the seat is moved to the center in the vehicle width direction and the airbag is moved between the seat belt and the occupant. It is possible to spread the gap along the seat belt.

Also, the invention according to claim 2, wherein the bent portion, in the direction of deployment of the airbag, the length of the member located bending direction side, than the length of the member located opposite the bending direction Also, it is characterized by being formed short.
The invention according to claim 3 is characterized in that the tip of the second developing portion is developed closer to the vehicle width direction center portion of the vehicle than the width direction center portion of the seat .
Also, the invention of claim 4, wherein the airbag, and having a guide portion for deploying along the airbag to deploy to the seat belt.
The invention according to claim 5 is characterized in that a groove that engages with the seat belt when the airbag is deployed is provided in the airbag as the guide portion.
According to a sixth aspect of the present invention, the guide portion is provided on a surface of the airbag to be deployed on the seat belt side, the seat belt is passed through an inner peripheral portion, and the guide belt extends along the seat belt. It is a ring-shaped member provided movably.

According to the present invention, the direction in which the airbag is deployed by the bent portion is changed to a target direction, whereby the occupant seated on the seat is moved to the center in the vehicle width direction, and the airbag is seated between the seat belt and the occupant. It is possible to develop the space along the seat belt, so that the safety can be improved.

1 is a schematic front view of an occupant protection device showing an embodiment of the present invention. 1 is a schematic side view of an occupant protection device. 1 is a schematic front view of an occupant protection device showing a state in which an airbag is deployed. It is the schematic of the passenger | crew protection device which shows the state which expand | deployed the airbag of the side view. It is the figure which looked at the developed airbag from the front. It is the figure which looked at the developed airbag from the side. It is the schematic of the passenger | crew protection device of the front view which shows the state which expand | deployed the airbag which shows other embodiment of this invention. It is the figure which looked at the developed airbag from the front.

  1 to 6 show an embodiment of the present invention.

  The occupant protection device of the present invention is applied to the seat 10 and the seat belt 20 of the vehicle 1 shown in FIGS. 1 and 2.

  The seat 10 is provided so that the occupant M is seated thereon, the seat cushion 12 is provided so as to extend upward from the rear end side of the seat cushion 11, and the seat back 12 for receiving the back portion of the occupant M; And a headrest 13 provided at the upper end for receiving the head of the occupant M.

The seat belt 20 is a three-point seat belt, and includes a webbing 22 wound around a retractor 21 provided near the lower portion of the center pillar of the vehicle 1, a long hole through which the webbing 22 is inserted, and a side wall 1a. A shoulder anchor 23 attached to the upper portion, an anchor plate 24 provided at an end of the webbing 22 and fixed to the frame 11a located on the side wall 1a side of the seat cushion 11, and between the anchor plate 24 and the shoulder anchor 23 A tongue plate 25 through which the webbing 22 is inserted, and a buckle 26 fixed to the frame 11a located on the center side in the vehicle width direction of the seat cushion 11 and detachably connecting the tongue plate 25. Yes.
The seat belt 20 is used by coupling the tongue plate 25 and the buckle 26 with the occupant M seated on the seat 10. At this time, the webbing 22 passes through the shoulder and chest of the occupant M obliquely from the upper part on the outer side in the vehicle width direction and extends to the lower part of the central part in the vehicle width direction, and the lower part of the occupant M from the lower part on the outer side in the vehicle width direction It passes through and extends to the lower part on the center side in the vehicle width direction. As a result, the seat belt 20 restrains the chest and the waist of the seat 10.

  The airbag unit 30 as an occupant protection device of the present invention is provided on the seat cushion 11 located above the frame 11a to which the anchor plate 24 is fixed.

  The airbag unit 30 includes an airbag 31 and an inflator 32 for deploying the airbag 31.

  The airbag 31 is made of a bag-like member made of a fiber having high strength and high heat resistance, and is configured to be deployed along the surface on the occupant M side of the webbing 22 that restrains the waist. The airbag 31 is provided so as to extend from the front end side of the first deployment portion 31a and a first deployment portion 31a that deploys to the outer side in the vehicle width direction of the waist portion of the occupant M seated on the seat 10. And a second development part 31b that develops to the side. The second deployment portion 31b is formed to have a length that extends from the center in the width direction of the occupant M to the center in the vehicle width direction with the airbag 31 inflated.

  As shown in FIG. 5, between the first deployment portion 31a and the second deployment portion 31b of the airbag 31, the second deployment portion 31b is positioned in the vehicle width direction center side with respect to the deployed first deployment portion 31a. The bent portion 31c is formed so as to be changed in the direction and deployed. The bent portion 31c is formed such that the length of the member on the bending direction side of the airbag 31 is shorter than the length of the member on the opposite side of the bending direction. The bent part 31c is formed by shortening the direction of bending of a member located between the first developed part 31a and the second developed part 31b by sewing. Further, the bent portion 31c is formed by forming a long fabric opposite to the bending direction of the member located between the first developing portion 31a and the second developing portion 31b and folding it in a hook shape. Even formation is possible.

  Further, a valve 31d is provided between the first deployment portion 31a and the second deployment portion 31b of the airbag 31 for shifting the timing at which the second deployment portion 31b is deployed with respect to the first deployment portion 31a by a predetermined time. It has been. The valve 31d is configured by reducing the flow path communicating with the second deployment portion 31b between the first deployment portion 31a and the second deployment portion 31b by sewing. The valve 31d can also be configured by sewing so that the first deployment portion 31a and the second deployment portion 31b communicate with each other when the pressure in the first deployment portion 31a exceeds a predetermined pressure.

  On the side where the webbing 22 that restrains the waist of the airbag 31 is located, as shown in FIG. 6, the webbing 22 is in a state where the airbag 31 is inflated from the first deployment part 31a to the second deployment part 31b. An engaging groove 31e is formed as a concave guide portion to be engaged.

  A guide ring 31 f made of a member such as a synthetic resin and having a long hole through which the webbing 22 can be inserted is attached to the tip of the second deployment portion 31 b of the airbag 31. The guide ring 31f is in a state in which the webbing 22 that restrains the waist is inserted while the airbag 31 is housed in the seat cushion 11.

  The inflator 32 ignites gunpowder to generate gas or releases high-pressure gas in the pressure vessel when an impact force greater than a predetermined value is detected by an impact detection sensor (not shown) provided on the side of the vehicle 1. It is something to let you. The gas released from the inflator 32 is supplied to the airbag 31.

  In the occupant protection device configured as described above, when an impact force of a predetermined level or more acts on the side surface of the vehicle 1 from the side, the airbag unit 30 supplies high-pressure gas from the inflator 32 toward the airbag 31. Then, the airbag 31 is deployed.

  The airbag 31 to be deployed protrudes from the seat cushion 11 to the occupant M side. As shown in FIG. 4, the airbag 31 that protrudes from the seat cushion 11 is deployed along the webbing 22 that restrains the waist, and first the first deployment portion 31 a is deployed, and the tip side contacts the waist of the occupant M from the side. Then, the occupant M seated on the seat 10 is moved toward the center in the vehicle width direction. Thereafter, the second unfolding portion 31b unfolds toward the center in the vehicle width direction via the bent portion 31c, and protects the abdomen of the occupant M, as well as the webbing 22 and the occupant M, as shown in FIG. The space between the lumbar region of the occupant is instantaneously increased and the restraining force of the occupant M by the webbing 22 is increased. At this time, the airbag 31 is deployed while the engagement groove 31e is engaged with the webbing 22, and is deployed while being guided by the guide ring 31f.

  Thus, according to the occupant protection device of the present embodiment, the bent portion is bent so that the airbag 31 is deployed toward the center in the vehicle width direction after being deployed in a direction other than the center in the vehicle width direction. 31c. As a result, the direction in which the airbag 31 is deployed by the bent portion 31c is changed to the target direction, thereby moving the occupant M seated on the seat 10 toward the center in the vehicle width direction, and the webbing 22 of the airbag 31. Since the restraining force of the occupant M by the webbing 22 can be increased by deploying the vehicle and the occupant M along the webbing 22, safety can be improved.

  In addition, the bent portion 31c is configured by forming the length of the member on the bending direction side of the airbag 31 shorter than the length of the member on the opposite side of the bending direction. Thereby, it is not necessary to attach another member for bending the airbag 31 to the airbag, and the manufacturing cost can be reduced.

  The airbag 31 has a valve 31d that is deployed later than the deployment timing of the first deployment portion 31a on the proximal end side. As a result, after the occupant M seated on the seat 10 is moved to the center in the vehicle width direction, the airbag 31 is deployed along the webbing 22 between the webbing 22 and the occupant M, whereby the occupant M by the webbing 22 is obtained. Since it becomes possible to increase the restraining force, it is possible to further improve the safety.

  Further, the bent portion 31c is provided between the first deployment portion 31a that is deployed on the side surface portion of the occupant M's body and the second deployment portion 31b that is deployed on the front surface portion of the occupant M's body. Thereby, it is possible to smoothly deploy the second deployment portion 31b, and it is possible to reliably deploy the second deployment portion 31b.

  Moreover, the edge part of the 2nd expansion | deployment part 31b is expand | deployed to the vehicle width direction center part side rather than the center part of the passenger | crew's M body at least. Thereby, since the waist | hip | lumbar part of the passenger | crew M can be protected reliably, it becomes possible to improve the safety | security of the passenger | crew M more.

  Further, the airbag 31 is provided with an engagement groove 31e that engages with the webbing 22 when the airbag 31 is deployed. As a result, the airbag 31 can be reliably deployed along the webbing 22, so that safety can be further improved.

  Further, on the webbing 22 side of the airbag 31 to be deployed, the webbing 22 is passed through the inner peripheral portion, and a guide ring 31 f provided so as to be movable along the webbing 22 is provided. As a result, the airbag 31 can be reliably deployed along the webbing 22, so that safety can be further improved.

  7 and 8 show another embodiment of the present invention.

  In the airbag unit 30, the airbag 33 is deployed only on the side surface of the occupant M seated on the seat 10. The airbag 33 has a first deploying portion 33a that deploys upward and a second deploying portion 33b that deploys from the side toward the side surface of the occupant M. Between the first deployment portion 33a and the second deployment portion 33b of the airbag 33, as shown in FIG. 8, the same configuration as that of the first embodiment for changing the deployment direction of the first deployment portion 33a is used. A bent portion 33c is formed.

  In the occupant protection device configured as described above, as shown in FIG. 7, the airbag 33 is deployed along the webbing 22 that restrains the waist, and the first deployment portion 33a and the second deployment portion 33b are deployed. Thus, the front end side comes into contact with the waist of the occupant M from the side surface side, and the occupant M seated on the seat 10 is moved toward the center in the vehicle direction. At this time, the second expanding portion 31b changes its direction toward the center in the vehicle width direction via the bent portion 31c, and contacts the side surface of the lumbar portion of the occupant M from the side. In addition, the airbag 33 instantaneously increases the space between the webbing 22 and the side surface side of the waist of the occupant M, thereby increasing the restraining force of the occupant M by the webbing 22.

  Thus, according to the occupant protection device of the present embodiment, as in the first embodiment, the airbag 33 is seated on the seat 10 by changing the deployment direction of the airbag 33 to the target direction by the bent portion 33c. The occupant M is moved toward the center in the vehicle width direction, and the airbag 33 is deployed along the webbing 22 between the webbing 22 and the side surface of the occupant M, thereby increasing the restraining force of the occupant M by the webbing 22. Therefore, it is possible to improve safety.

  Further, the bent portion 33c is provided between the first deployment portion 33a and the second deployment portion 33b that are deployed on the side surface portion side of the occupant M. Thereby, since the edge part of 2nd expansion | deployment part 33b can be made to contact the side surface side of the waist | hip | lumbar part of the passenger | crew M reliably, the passenger | crew M seated on the seat | sheet 10 can be moved more reliably to the vehicle width direction center part side. Is possible.

  In the above-described embodiment, the guide portion for deploying the airbag 31 along the webbing 22 is shown with the engagement groove 31e and the guide ring 31f provided at the same time. However, the present invention is not limited to this. For example, if it is possible to deploy the airbag 31 along the webbing 22, it is sufficient that at least one of the engagement groove 31e and the guide ring 31f is provided.

  Moreover, although the said embodiment showed what provided the guide ring 31f in the front-end | tip part of the 2nd deployment part 31b of the airbag 31, it is not restricted to this. For example, you may make it provide in intermediate parts, such as the bending part 31c of the airbag 31, and may make it provide the some guide ring 31f along the direction which the airbag 31 expand | deploys.

  DESCRIPTION OF SYMBOLS 10 ... Seat, 11 ... Seat cushion, 12 ... Seat back, 20 ... Seat belt, 21 ... Webbing, 30 ... Air bag unit, 31 ... Air bag, 31a ... First deployment part, 31b ... Second deployment part, 31c ... Bending part, 31d ... valve, 31e ... engagement groove, 31f ... guide ring, 33 ... airbag, 33a ... first deployment part, 33b ... second deployment part, 33c ... bending part.

Claims (6)

In the occupant protection device including an airbag that deploys between the seat belt and the occupant along the seat belt,
The airbag has a first deployment portion that is deployed in a direction other than the vehicle width direction center portion side of the vehicle, and a second deployment that is deployed toward the vehicle width direction center portion side of the vehicle, outside the vehicle width direction of the vehicle. A deployment portion, and a bending portion that is provided between the first deployment portion and the second deployment portion and bends so as to change a deployment direction of the second deployment portion with respect to a deployment direction of the first deployment portion. has,
The first deployment part is deployed on a side part of the occupant's body,
The second deployment part is deployed on the front part of the occupant's body,
The occupant protection device , wherein the second deployment unit is configured to deploy at a later timing than the first deployment unit is deployed . The bent portion is configured by forming a length of a member positioned on the side of the bending direction in a direction in which the airbag is deployed shorter than a length of a member positioned on the opposite side of the bending direction. The occupant protection device according to any one of the preceding claims. The tip of the second expansion section, an occupant protection device according to claim 1 or 2, characterized in that deploying the vehicle width direction central portion side of the vehicle than the widthwise central portion of the sheet. The occupant protection device according to any one of claims 1 to 3 , wherein the airbag includes a guide portion that deploys the airbag to be deployed along the seat belt. The occupant protection device according to claim 4 , wherein a groove that engages with the seat belt when the airbag is deployed is provided in the airbag as the guide portion. The guide part is provided on a surface of the airbag to be deployed on the seat belt side, the seat belt is passed through an inner peripheral part, and a ring-shaped member provided to be movable along the seat belt The occupant protection device according to claim 4 , wherein:

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