JP5668675B2 - Vehicle occupant restraint system - Google Patents

Description

  The present invention relates to a vehicle occupant restraint device.

  As a vehicle occupant protection device, a structure is disclosed that includes side airbags that are respectively stored at both ends in the vehicle width direction of a seat cushion and a seat back, and a belt that is stored in an L shape from the seat cushion to the seat back. (See Patent Document 1). In this structure, the belt is stretched between the upper end of the seat back and the front end of the seat cushion by the actuator when performing the occupant protection operation against the side collision. By this belt, displacement of the deployed side airbag outward in the vehicle width direction is restricted from the outer side in the vehicle width direction of the airbag.

JP 2009-29182 A

  However, in the above-described conventional example, the side airbag corresponds to the chest and waist of the occupant and does not correspond to the shoulder. Further, since the belt that regulates the displacement of the side airbag is structured to be stretched between the upper end of the seat back and the front end of the seat cushion, that is, at a position lower than the shoulder portion of the occupant, the deployment region of the side airbag Even if it is extended to the height position of the shoulder portion of the occupant, it is considered difficult to regulate the displacement of the region corresponding to the shoulder portion with the belt.

  In view of the above facts, an object of the present invention is to improve occupant restraint performance by a side airbag.

According to a first aspect of the present invention, there is provided a side airbag that is stored in a side portion of a seat back of a vehicle seat and that inflates and deploys to a side of a chest and a shoulder portion of an occupant in a side collision, and a headrest in a side portion of the vehicle seat. stored from the upper portion over the lower portion of the seat back, front edge, the side is previously connected to the leading edge at a position intersecting the front edge of the airbag, during a side collision, the front edge the headrest A restricting member that is deployed in a sheet shape outwardly in the seat width direction of the deployment region of the side airbag so as to connect the upper end portion of the seat cushion and the front end portion of the seat cushion, and a lower front end of the restricting member at the side collision An actuator that pulls out from the lower end of the back to the front end of the seat cushion.

  In the vehicle occupant restraint device according to the first aspect, the side airbag is inflated and deployed to the sides of the occupant's chest and shoulders at the time of a side collision. At the same time, the lower front end of the regulating member stored across the upper end portion of the headrest from the lower end portion of the seat back is pulled out from the lower end portion of the seat back to the front end portion of the seat cushion by the actuator. As a result, the regulating member is deployed in a planar shape on the outer side in the seat width direction of the deployment region of the side airbag.

At this time, the front edge of the restricting member extends from the upper end of the headrest to the front end of the seat cushion. Due to the front edge, the lower edge along the seat cushion, and the rear edge along the seat back, the developed shape of the restricting member is substantially triangular. When viewed from the side of the seat, the position of the shoulder portion of the occupant is within the deployment range of the restricting member. Accordingly, even if the side airbag is pushed outward in the seat width direction by the shoulder portion of the occupant, the displacement of the side airbag in the seat width direction outside is restricted by the regulating member. For this reason, the passenger | crew restraint performance by a side airbag can be improved.
In addition, since the front edge of the regulating member is pre-connected to the front edge at a position that intersects the front edge of the side airbag, the regulating member can be stably deployed at the same timing as the side airbag. Can do.

  According to a second aspect of the present invention, in the vehicle occupant restraint device according to the first aspect, the actuator includes a pulley provided at the front end portion of the seat cushion, and one end connected to the lower front end of the restriction member. And extending to the front end of the seat cushion and wound around the pulley, and connected to the other end of the wire, and a pretensioner that is actuated at the time of a side collision and draws the wire.

  In the vehicle occupant restraint device according to the second aspect, the pretensioner is actuated at the time of a side collision to pull the wire. Since the wire is wound around the pulley at the front end portion of the seat cushion and one end is connected to the lower front end of the regulating member, the lower front end of the regulating member is moved to the seat cushion by pulling the wire into the pretensioner. Pulled out to the front end. Thereby, a control member can be rapidly developed at the time of a side collision.

  According to a third aspect of the present invention, in the vehicle occupant restraint device according to the first aspect, the actuator is provided at a lower portion of the side airbag, is connected to the lower front end of the restricting member, and A duct extending to the front side of the seat as the seat is inflated and deployed; and a return preventing mechanism for holding the lower front end of the restricting member pulled out to the front end of the seat cushion in that position.

  In the vehicle occupant restraint device according to the third aspect, when the side airbag is inflated and deployed at the time of a side collision, the duct under the side airbag extends to the front side of the seat. Since this duct is connected to the lower front end of the regulating member, the lower front end of the regulating member is pulled out to the front end of the seat cushion as the side airbag is inflated and deployed. The lower front end of the drawn out regulating member is held at that position by the return prevention mechanism.

  Thus, by deploying the restricting member by utilizing the extension of the duct accompanying the inflation and deployment of the side airbag, the occupant restraint performance by the side airbag can be enhanced at a low cost.

  As described above, according to the vehicle occupant restraint device of the first aspect of the present invention, an excellent effect that the occupant restraint performance by the side airbag can be enhanced is obtained.

  According to the vehicle occupant restraint device of the second aspect, it is possible to obtain an excellent effect that the regulating member can be quickly deployed at the time of a side collision.

  According to the vehicle occupant restraint device of the third aspect, an excellent effect that the occupant restraint performance by the side airbag can be enhanced at low cost is obtained.

  According to the vehicle occupant restraint device of the fourth aspect, an excellent effect is obtained that the regulating member can be stably deployed at the same timing as the side airbag.

1 to 4 relate to a first embodiment, and FIG. 1 is a side view showing a state in which a side airbag and a regulating member are deployed in a vehicle occupant restraint device. In the vehicle occupant restraint device, it is a perspective view showing a mounting state of the airbag module and the regulating member on the side portion of the seat back. It is a side view which shows the structure of an actuator. In a vehicle occupant restraint device, it is a front view showing a state where a side air bag and a regulating member are developed. It is a side view showing the structure of an actuator in the crew restraint device for vehicles concerning a 2nd embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
1 and 2, the vehicle occupant restraint device 10 according to the present embodiment includes a side airbag 12, a regulating member 14, and an actuator 16 (Fig. 3).

  The side airbag 12 is stored in the seat back side portion 22S of the vehicle seat 18, and is configured to inflate and deploy to the side of the chest portion 24C and the shoulder portion 24S of the occupant 24 at the time of a side collision. The side airbag 12 is further configured to be inflatable and deployable to the side of the head 24H of the occupant 24.

  The side airbag 12 is accommodated in a module case (not shown) together with an inflator (not shown), for example. Thereby, the airbag module 26 is configured. The side airbag 12 is mounted on the seat back side portion 22S in the state of the airbag module 26. Note that the inflator may be disposed outside the module case.

  The restricting member 14 is stored across the upper end portion 28 </ b> A of the headrest 28 at the side portion of the vehicle seat 18 and the lower end portion 22 </ b> L of the seat back 22. Thus, in order to store the regulating member 14, the vehicle seat 18 has a structure in which the seat back 22 and the headrest 28 are integrated. Thereby, storing of the regulating member 14 in the side portion of the vehicle seat 18 is facilitated.

  As shown in FIG. 2, a planned break portion 23 is provided from the upper end portion 28 </ b> A of the headrest 28 to the lower end portion 22 </ b> L of the seat back 22 at the side portion of the vehicle seat 18. The planned breaking portion 23 is, for example, control sewing, so-called tear seam, which is broken by the inflating force of the side airbag 12 or the pulling force of the regulating member 14. When the planned break portion 23 is broken, the side airbag 12 and the regulating member 14 can be quickly and easily deployed from the inside of the vehicle seat 18 to the outside.

  The restricting member 14 is configured by a uniform cloth, a lattice-like cloth (mesh), or the like, and for example, a material equivalent to a base cloth used for an airbag is used. The front edge 14F of the regulating member 14 is connected in advance to the front edge portion 12F of the side airbag 12 (sewing portion S in FIG. 1). The sewing portion S is provided at a position where the front edge portion 12F of the side airbag 12 and the front edge 14F of the regulating member 14 intersect in a side view. In addition, it is good also as a structure which does not provide this sewing part S. FIG.

  The restricting member 14 is deployed in a sheet shape outward in the seat width direction of the deployment region of the side airbag 12 so that the front edge 14F connects the upper end 28A of the headrest 28 and the front end 30A of the seat cushion 30 at the time of a side collision. It is configured as follows. That is, the upper end 28 </ b> A side of the headrest 28 of the regulating member 14 hardly expands, and the lower edge 14 </ b> L side expands most.

  The developed shape of the restricting member 14 is substantially triangular due to the front edge 14F, the lower edge 14L along the seat cushion 30, and the rear edge 14R along the seat back 22. In FIG. 3, the actuator 16 is configured to pull out the lower front end 14 </ b> A of the regulating member 14 from the lower end 22 </ b> L of the seat back 22 to the front end 30 </ b> A of the seat cushion 30 at the time of a side collision. The actuator 16 includes a pulley 32, a wire 34, and a pretensioner 36 in a seat cushion 30, for example.

  The pulley 32 is provided at the front end 30 </ b> A of the seat cushion 30. Specifically, the pulley 32 is attached to the seat cushion frame 38 inside the end portion in the seat width direction of the front end portion 30 </ b> A of the seat cushion 30. The pulley 32 is configured to be rotatable about the seat width direction as a central axis.

  One end 34 </ b> A of the wire 34 is connected to the lower front end 14 </ b> A of the regulating member 14, extends to the front end 30 </ b> A of the seat cushion 30, and is wound around the pulley 32. The other end 34 </ b> B of the wire 34 is connected to the pretensioner 36.

  The pretensioner 36 is a device that is connected to the other end 34 </ b> B of the wire 34, operates when a side collision occurs, and pulls the wire 34. As an example, the pretensioner 36 includes a cylinder 40, a piston 42 that can slide in the cylinder 40, and a gas generation source 44 that moves the piston 42 to the rear side of the seat (in the direction of arrow R). Configured. The axial direction of the cylinder 40 is the longitudinal direction of the seat. The other end 34B of the wire 34 is connected to the piston 42 from the front side of the seat.

  The gas generation source 44 is activated at the time of a side collision and supplies gas to the piston 42.

  Note that the structure of the pretensioner 36 is not limited to this, and a configuration in which, for example, the wire 34 is wound around the spool shaft as in the pretensioner of the seat belt device may be employed.

  At the time of a side collision, the regulating member 14 is deployed in a planar shape outside the deployment region of the side airbag 12 in the seat width direction, and the lower front end 14A of the regulating member 14 is connected to one end 34A of the wire 34. It has become. For this reason, when the restricting member 14 is deployed, the lower portion of the restricting member 14 moves in the seat cushion 30. In order to enable this, an end portion of the seat cushion 30 in the seat width direction is provided with a planned breaking portion that is broken when the regulating member 14 is pulled out by the wire 34 (not shown).

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1, in the vehicle occupant restraint device 10 according to the present embodiment, the side airbag 12 is inflated and deployed to the side of the chest 24C and the shoulder 24S of the occupant 24 at the time of a side collision. At the same time, the lower front end 14A of the restricting member 14 stored across the upper end 28A of the headrest 28 and the lower end 22L of the seat back 22 is moved from the lower end 22L of the seat back 22 to the front end of the seat cushion 30 by the actuator 16. Pulled out to 30A.

  At this time, an opening (not shown) is formed by breaking the planned breakage portion 23 (FIG. 2) provided in the vehicle seat 18. Further, when the regulating member 14 is pulled out by the wire 34, the breakable portion (not shown) of the seat cushion 30 is broken, and an opening (not shown) is formed at the end of the seat cushion 30 in the seat width direction. Is done. The side airbag 12 and the regulating member 14 are deployed from the inside of the vehicle seat 18 to the outside through each opening.

  Here, the operation of the actuator 16 will be described. As shown in FIG. 3, at the time of a side collision, the pretensioner 36 operates to pull the wire 34. Specifically, gas is supplied from the gas generation source 44 of the pretensioner 36 to the piston 42, and the piston 42 moves in the cylinder 40 to the rear side of the seat (in the direction of arrow R). Accordingly, the other end 34B side of the wire 34 also moves to the seat rear side (arrow R direction).

  Since the wire 34 is wound around the pulley 32 of the front end portion 30A of the seat cushion 30 and one end 34A is connected to the lower front end 14A of the restricting member 14, the wire 34 is pulled into the pretensioner 36, thereby restricting the wire 34. The lower front end 14 </ b> A of the member 14 is pulled out in the direction of arrow F to the front end 30 </ b> A of the seat cushion 30. As shown in FIG. 4, in this way, the regulating member 14 is rapidly deployed in a sheet shape outside the deployment region of the side airbag 12 in the seat width direction.

  Further, as shown in FIG. 1, the front edge 14F of the restriction member 14 is connected in advance to the front edge part 12F of the side airbag 12 (sewing part S), so that the restriction member 14 can be pulled out by the actuator 16. In addition, the expansion force of the side airbag 12 is also applied, and the vehicle is pulled out from the vehicle seat 18. For this reason, the regulating member 14 can be stably deployed at the same timing as the side airbag 12.

  The deployed front edge 14F of the restricting member 14 extends from the upper end 28A of the headrest 28 to the front end 30A of the seat cushion 30. Due to the front edge 14F, the lower edge 14L along the seat cushion 30 and the rear edge 14R along the seat back 22, the developed shape of the restricting member 14 is substantially triangular. When viewed from the side of the seat, the position of the shoulder 24 </ b> S of the occupant 24 is within the deployed range of the restricting member 14. Therefore, even if the side airbag 12 is pushed outward in the seat width direction by the shoulder 24S of the occupant 24, the displacement of the side airbag 12 outward in the seat width direction is restricted by the restriction member 14.

  Specifically, displacement of the side airbag 12 to the outside in the seat width direction can be suppressed by the tension generated at the front edge 14F of the regulating member 14. For this reason, the passenger | crew restraint performance by the side airbag 12 can be improved.

  Further, in the present embodiment, by restraining the shoulder portion 24S of the occupant 24 by the side airbag 12 via the regulating member 14, the displacement of the head 24H of the occupant 24 to the outside in the seat width direction can be significantly suppressed. it can.

[Second Embodiment]
In FIG. 5, in the vehicle occupant restraint device 20 according to the present embodiment, the actuator 16 includes a duct 46 and a return prevention mechanism 48.

  The duct 46 is provided at the lower part of the side airbag 12, and is connected to the lower front end 14A of the regulating member 14 at the front end 46A, for example, and is configured to extend forward of the seat as the side airbag 12 is inflated and deployed. . The duct 46 is an inflating portion, which is inflated by a part of the inflating gas supplied to the side airbag 12 and extends to the front side of the seat.

  The length of the duct 46 is set such that, for example, the front end 46A reaches the front end 30A of the seat cushion 30 when the duct 46 is expanded. In other words, the length of the duct 46 corresponds to the length of the lower edge 14L (see FIG. 1) of the regulating member 14 at the time of deployment.

  The length of the duct 46 is not limited to this, and the duct 46 may be configured to extend further forward of the seat than the front end portion 30A of the seat cushion 30. In that case, the deployment range of the regulating member 14 can be expanded to the front of the seat as compared with the case of the first embodiment, and the displacement of the side airbag 12 to the outside in the seat width direction can be further suppressed. Become.

  One end of a strap 50 is attached to the lower front end 14 </ b> A of the regulating member 14, and for example, a ring-shaped guide member 52 is attached to the other end of the strap 50. A linear guide rail 54 for guiding the guide member 52 is provided along the seat front-rear direction at the end in the seat cushion 30 in the seat width direction. The guide member 52 is always passed through the guide rail 54.

  The return prevention mechanism 48 is a mechanism that holds the lower front end 14 </ b> A of the regulating member 14 pulled out to the front end 30 </ b> A of the seat cushion 30 in that position. Specifically, the return prevention mechanism 48 is an inverted U-shaped bent portion that is formed at the front end of the guide rail 54 and protrudes upward from the seat. When the guide member 52 is caught by the return preventing mechanism 48, the position of the lower front end 14 </ b> A in the deployed regulating member 14 is regulated.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 5, in the vehicle occupant restraint device 20 according to the present embodiment, when the side airbag 12 is inflated and deployed at the time of a side collision, the duct 46 under the side airbag 12 is inflated and extends to the front side of the seat. . Since the front end 46 </ b> A of the duct 46 is connected to the lower front end 14 </ b> A of the restriction member 14, the lower front end 14 </ b> A of the restriction member 14 moves to the front end 30 </ b> A of the seat cushion 30 as the side airbag 12 is inflated and deployed. Pulled out.

  At this time, the guide member 52 attached to the lower front end 14A of the restricting member 14 via the strap 50 moves to the front of the seat while being guided by the guide rail 54, so that the movement locus of the lower front end 14A is restricted. Can do.

  When the lower front end 14 </ b> A of the regulating member 14 is pulled out to the front end 30 </ b> A of the seat cushion 30, the guide member 52 is caught by the return prevention mechanism 48 that is an inverted U-shaped bent portion. As a result, the lower front end 14A of the deployed regulating member 14 is held in that position. Moreover, this can suppress the displacement of the side airbag 12 outward in the seat width direction.

  Thus, the passenger | crew restraint performance by the side airbag 12 can be improved at low cost by deploying the control member 14 using the expansion | extension of the duct accompanying the expansion | deployment deployment of the side airbag 12. FIG.

  When the vehicle occupant restraint device 20 is operated, the planned break portion 23 (see FIG. 2) of the vehicle seat 18 is broken to form an opening (not shown), or the seat cushion 30 is scheduled to break. A portion (not shown) is broken, and an opening (not shown) is formed at the seat width direction end of the seat cushion 30 as in the first embodiment.

[Other Embodiments]
The vehicle occupant restraint devices 10 and 20 described above can be provided on the seat back side portions 22S on both sides of the vehicle seat 18. In such a configuration, the occupant 24 can be appropriately restrained regardless of whether the seating position of the occupant 24 is the collision side or the anti-collision side.

  The structure of the actuator 16 is not limited to that described above, and any structure may be used as long as the regulating member 14 can be pulled out and deployed.

DESCRIPTION OF SYMBOLS 10 Vehicle occupant restraint device 12 Side airbag 12F Front edge part 14 Restriction member 14A Lower front end 14F Front edge 16 Actuator 18 Vehicle seat 20 Vehicle occupant restraint device 22 Seat back 22L Lower end part 22S Seat back side part 24 Crew 24C Chest part 24S shoulder 28 headrest 28A upper end 30 seat cushion 30A front end 32 pulley 34 wire 34A one end 34B other end 36 pretensioner 46 duct 48 return prevention mechanism

Claims (3)

A side airbag that is stored in a seat back side portion of a vehicle seat and inflates and deploys to the side of an occupant's chest and shoulders in a side collision;
Stored across the lower end of the seat back from the upper end of the headrest at the side of the vehicle seat, the front edge is connected in advance to the front edge at a position that intersects the front edge of the side airbag, during a side collision, a regulating member which the leading edge is developed in the upper part and the seat width direction outside the planar expansion area of the side air bag so as to connect the front end of the seat cushion of the headrest,
An actuator for pulling out the lower front end of the regulating member from the lower end of the seat back to the front end of the seat cushion at the time of a side collision;
An occupant restraint device for vehicles. The actuator is
A pulley provided at the front end of the seat cushion;
One end is connected to the lower front end of the restricting member and extends to the front end of the seat cushion, and a wire wound around the pulley;
A pretensioner connected to the other end of the wire and actuated at the time of a side collision to pull in the wire;
The vehicle occupant restraint device according to claim 1, comprising: The actuator is
A duct provided at a lower portion of the side airbag, connected to the lower front end of the restricting member, and extending to a seat front side along with the inflation and deployment of the side airbag;
A return prevention mechanism for holding the lower front end of the restricting member pulled out to the front end of the seat cushion in its position;
The vehicle occupant restraint device according to claim 1, comprising: