JP5807625B2 - Side airbag device for vehicle - Google Patents

Description

  The present invention relates to a vehicle side airbag device.

  2. Description of the Related Art Conventionally, a vehicle side airbag device for projecting a restricting member so as to be attached to a side airbag when the side airbag is inflated and deployed has been proposed (for example, see Patent Document 1).

JP 2007-230310 A

  However, in the vehicle side airbag device described in Patent Document 1, since the side airbag and the regulating member are provided independently of each other, the regulating member may slide along the side airbag. There is a possibility that the reaction force of the side airbag at the time of inflation and deployment cannot be effectively received.

  Then, an object of this invention is to obtain the side airbag apparatus for vehicles which can receive effectively the reaction force of the side airbag at the time of expansion | deployment.

In order to achieve the above object, a vehicle side airbag device according to claim 1 of the present invention includes an inflator that generates gas when activated, and a side portion of a seat back frame in a folded state. Side air that is stored and is inflated and deployed in a rectangular shape in a side view as viewed from the vehicle width direction from the side portion of the seat back to the front side of the vehicle body by supplying gas generated from the inflator to restrain the occupant One end of the bag is pivotally supported on the lower side of the side portion of the seat back frame, and the other end extends to a position reaching the upper front end of the side airbag. a first link member mounted to a side upper portion is rotatably supported on the upper side one end of the side portion of the seat back frame, the side other end It is characterized in that it has a second link member is extended to a position reaching the front side of the vehicle body lower portion of the airbag attached to the vehicle body front lower end, a regulating member having a, a.

According to the invention described in claim 1, in the event of a side collision of the vehicle, gas is generated from the inflator, the gas, Ru is supplied into the stored in a folded state side air bag.

Thus, the side airbag is inflated and deployed in a rectangular shape in a side view as viewed from the vehicle width direction to restrain the occupant. At this time, the side airbag is provided with the first link member and the second link member. The provided regulating member is attached.

That is, the other end portion of the first link member, whose one end portion is rotatably supported on the lower side of the side portion of the seat back frame, extends to a position reaching the vehicle body front side upper end portion of the side airbag, The other end portion of the second link member attached to the upper end portion on the front side of the vehicle body and rotatably supported on the upper side of the side portion of the seat back frame is connected to the lower end portion on the front side of the vehicle body of the side airbag. It is extended position until, that is attached to the front side of the vehicle body lower portion.

Thus, the regulating member, the behavior of the vehicle width direction of the side air bag is restricted at the time of inflation and deployment, Ru is stably caused the reaction force against the side air bag.

That is, according to the regulating member, the reaction force of the side air bag is Ru is received effectively at the time of inflation and deployment.

The vehicle side airbag device according to claim 2 is the vehicle side airbag device according to claim 1 , wherein the first link member and the second link member are provided on the side airbag. When inflating and deploying is completed, the air bag is disposed substantially along a diagonal line of the side airbag as viewed from the side in the vehicle width direction.

According to the second aspect of the present invention, the first link member and the second link member are disposed substantially along the diagonal of the side airbag as viewed from the side in the vehicle width direction when the side airbag is inflated and deployed. Is done. Therefore, the behavior of the side airbag in the vehicle width direction at the time of inflating and deploying is more favorably regulated, and the reaction force can be generated more stably with respect to the side airbag.

As described above, according to the first aspect of the present invention, the behavior of the side airbag in the vehicle width direction at the time of inflation and deployment can be regulated, and the reaction force can be stably applied to the side airbag. Ru can be generated.

That is, according to the present invention, the reaction force of the side airbag at the time of inflation and deployment can be effectively received .

According to the second aspect of the invention, the behavior of the side airbag in the vehicle width direction at the time of inflating and deploying can be more satisfactorily controlled, and the reaction force can be generated more stably with respect to the side airbag. Can be made.

(A) It is a perspective view which shows the sheet | seat before the far side airbag apparatus which concerns on this embodiment is inflate-deployed. (B) It is a perspective view which shows the sheet | seat after the far side airbag apparatus which concerns on this embodiment is inflate-deployed. It is a disassembled perspective view which shows the attachment structure to the seat back frame of the far side airbag apparatus which concerns on this embodiment. It is a perspective view which shows the far side airbag apparatus before the inflation deployment which concerns on this embodiment. It is a perspective view showing the far side airbag device after inflation deployment concerning this embodiment.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For convenience of explanation, an arrow UP appropriately shown in each drawing is an upward direction of the vehicle body, an arrow FR is a forward direction of the vehicle body, and an arrow IN is an inner side of the vehicle width direction. In addition, in the following description, when the front-rear, up-down, left-right directions are indicated without special mention, the front-rear direction of the vehicle body, the up-down direction of the vehicle body, the left-right direction of the vehicle body (the vehicle width direction) To do.

  As shown in FIG. 1, a vehicle seat 10 includes a seat cushion 12 on which an occupant sits, a seat back 14 that stands upright at the rear end of the seat cushion 12 and supports the upper body of the occupant, A headrest 18 is provided at the center of the upper end of the back 14 so as to be adjustable in height, and supports the head of the occupant.

  A straight fragile portion 14B extending in the vehicle body vertical direction is formed on the skin of the side portion 14A on the inner side in the vehicle width direction of the seat back 14, and the side portion 14A (skin) has a side surface of the vehicle. A vehicle side airbag device (hereinafter referred to as “far-side airbag device”) 20 that accommodates a fragile portion 14B that is inflated and deployed toward the front side of the vehicle body at the time of a collision is housed.

  As shown in FIGS. 2 to 4, the far-side airbag device 20 includes a side frame 16 </ b> A as a side portion on the inner side in the vehicle width direction of the seat back frame 16 constituting the skeleton member of the seat back 14. It is stored by being attached by a weld nut (not shown) provided on the frame 16A and a flange bolt 46 or a bolt 48.

  Specifically, the far side airbag device 20 is disposed on the side frame 16A on the vehicle body rear side of the far side airbag 22 and the far side airbag 22 stored in the side frame 16A in a folded state. An inflator 26 that supplies gas to the far side airbag 22 and a regulating member 30 that supports the side surface portion 22A on the inner side in the vehicle width direction of the inflated and deployed far side airbag 22 are provided as main parts.

  The far-side airbag 22 is formed in a bag shape in which the shape when inflated and deployed (after inflated and deployed) is a rectangular shape as viewed from the side in the vehicle width direction. A pocket portion 23 is formed in each of the side surface portion 22A on the vehicle body front side upper end portion (vehicle body front upper side) and vehicle body front side lower end portion (vehicle body front lower side). Overhang portions 33 and 37 (to be described later) of the regulating member 30 are inserted into the pocket portion 23, respectively.

  In addition, a gas injection port 24 that opens to the rear side of the vehicle body is formed at a substantially central portion in the vehicle body vertical direction at the side edge portion 22B of the far side airbag 22 on the rear side of the vehicle body. The far side airbag 22 has a side edge portion 22B fixed to the side frame 16A. That is, through holes 22C through which the flange bolts 46 are inserted are formed at both ends in the vehicle body vertical direction of the edge portion 22B.

  Accordingly, the flange bolt 46 is inserted into each through hole 22C, and is inserted into each through hole 16C formed in the side frame 16A, and a weld nut (not shown) provided coaxially with each through hole 16C. The side edge portion 22B of the far side airbag 22 is fixed to the side frame 16A.

  The inflator 26 is made of metal and is formed in a cylindrical shape with both axial ends closed. A squib (ignition device) (not shown) is disposed at the axial center of one end of the inflator 26 in the axial direction. Further, the inside of the inflator 26 is filled with a gas generating agent that generates a large amount of gas by burning, and a coolant for cooling the generated high-temperature gas and fragments generated when the gas generating agent burns. A filter or the like for removing water is accommodated.

  Note that the inflator 26 in this embodiment is a type of inflator that uses a gas generating agent, but a type of inflator in which high-pressure gas is sealed may be used. Further, a gas ejection portion 28 that opens to the front side of the vehicle body is formed on the peripheral wall portion at the axially central portion of the inflator 26. The gas ejection portion 28 is inserted into the gas inlet 24 of the far side airbag 22 from the rear side of the vehicle body and attached.

  The inflator 26 is fixedly supported by a bracket 27 at a central portion in the axial direction. Two through holes (not shown) through which the bolts 48 are inserted are formed at both ends of the bracket 27 in the vertical direction of the vehicle body. Therefore, the bolts 48 are respectively inserted into the through holes, inserted into the through holes 16B of the side frame 16A, and screwed into weld nuts (not shown) provided coaxially with the through holes 16B. The inflator 26 is fixed to the side frame 16A.

  Further, the inflator 26 is connected to, for example, a controller (airbag ECU) (not shown) disposed in the center of the vehicle body floor. This controller is connected to a side collision detection sensor (not shown) disposed in the side of the vehicle body such as a rocker or a center pillar or in a side door.

  The regulating member 30 includes a flat plate-like first link member 32 and a second link member 36. The first link member 32 and the second link member 36 are formed in the same shape, and through holes 32C and 36C through which the flange bolts 46 are inserted are formed in the respective one end portions 32A and 36A. That is, the first link member 32 and the second link member 36 are configured such that the one end portions 32A and 36A are rotatably attached to the side frame 16A by the flange bolts 46.

  Specifically, the flange bolt 46 is sequentially inserted into each of the through holes 32C and 36C and each of the washers (not shown), and then inserted into each of the through holes 22C formed in the edge portion 22B of the far side airbag 22. Further, it is inserted into each through hole 16C of the side frame 16A and screwed into the weld nut.

  Thus, the one end portions 32A and 36A of the first link member 32 and the second link member 36 are attached to the side frame 16A together with the edge portion 22B of the far side airbag 22, and the side frame 16A has friction. In this state, it is supported so as to be rotatable. That is, as a result, the retracted state of the far side airbag 22 can be maintained.

  At the other end portions 32B and 36B of the first link member 32 and the second link member 36, overhang portions 33 and 37 extending in a direction perpendicular to the longitudinal direction of the first link member 32 and the second link member 36 are provided. Are integrally formed. That is, the first link member 32 and the second link member 36 are each formed in a substantially “T” shape.

  And each overhang | projection part 33,37 (each other end part 32B, 36B) is inserted in each pocket part 23 of the far side airbag 22, and the edge part 23A in the opening side of each pocket part 23 is each side surface after that. By sewing the portion 22A, the other end portions 32B and 36B (the overhang portions 33 and 37) of the first link member 32 and the second link member 36 are the upper end portions on the vehicle body front side of the far side airbag 22. And it fixes to the vehicle body front side lower end part so that it may not fall off, respectively.

  The other end portions 32B and 36B (the projecting portions 33 and 37) of the first link member 32 and the second link member 36 are connected to the vehicle body front side upper end portion and the vehicle body front side lower end portion of the far side airbag 22, respectively. The means for fixing each is not limited to this. For example, the other end portions 32B and 36B (the overhang portions 33 and 37) may be fixed to the side surface portion 22A by bonding them with an adhesive or the like.

  In addition, elongated holes 34 and 38 are formed in the longitudinal direction substantially central portions of the first link member 32 and the second link member 36, respectively, along the longitudinal direction. The long hole 34 and the long hole 38 are fitted with a resin connector 40 inserted therethrough, whereby the first link member 32 and the second link member 36 are integrally connected. It is like that.

  Specifically, the connector 40 includes a convex coupling part 42 in which a cylindrical part 42B is formed at the center of the disk part 42A, and a concave coupling part 44 in which a cylindrical part 44B is formed at the center of the disk part 44A. The height of the cylindrical portion 44B is approximately twice the plate thickness of the first link member 32 (or the second link member 36).

  The inner diameter of the cylindrical portion 44B is slightly smaller than the outer diameter of the columnar portion 42B. Therefore, the cylindrical portion 44B is continuously inserted into the long hole 34 and the long hole 38, and the columnar portion 42B is press-fitted into the cylindrical portion 44B, whereby the connector 40 is inserted into the first link member 32 and the second link member 36. It can be attached.

  Accordingly, the first link member 32 and the second link member 36 are configured to be rotatable in opposite directions around the connector 40, and the connector 40 is movable along the long holes 34 and 38. It is designed to be configured. That is, this allows the first link member 32 and the second link member 36 to follow the side surface portion 22A when the far-side airbag 22 is inflated and deployed.

  In addition, the 1st link member 32 and the 2nd link member 36 are each arrange | positioned substantially along the diagonal in 22 A of side parts of the far side airbag 22 at the time of completion of expansion | deployment. Each of the long holes 34 and 38 is formed to be slightly longer than the moving range of the connector 40 so that the connector 40 does not hinder the inflation and deployment of the far side airbag 22. The length may be set so as to be the same as the movement range of 40.

  Next, the operation of the far-side airbag device 20 configured as described above will be described.

  When the vehicle collides with the side, a side collision detection sensor (not shown) detects that the vehicle has collided, and a detection signal is output to the controller. Then, the controller applies a predetermined current to the squib of the inflator 26 of the far-side airbag device 20. As a result, the gas generating agent burns to generate a large amount of gas, which is ejected from the gas ejection portion 28 of the inflator 26 into the far side airbag 22 through the gas inlet 24.

  When the gas is ejected into the far side airbag 22, the far side airbag 22 stored in a state of being folded in the side frame 16A is inflated, and the weak portion 14B of the seat back 14 is cleaved to open the front side of the vehicle. Inflated and expanded. The far-side airbag 22 that is inflated and deployed toward the front side of the vehicle body is pressed against the upper body of the seated occupant to compress and deform, thereby protecting the upper body of the seated occupant from impact.

  Here, the one end portions 32A and 36A of the first link member 32 and the second link member 36 constituting the regulating member 30 are rotatably supported by the side frame 16A. And each other end part 32B and 36B (each overhang part 33 and 37) is each pocket part provided in the vehicle body front side upper end part and vehicle body front side lower end part in side part 22A of far side airbag 22, respectively. 23 is fixed by being inserted.

  Further, the first link member 32 and the second link member 36 are configured to be rotatable in opposite directions around the connector 40 by a connector 40 inserted and attached to each of the long holes 34 and 38. The connector 40 is configured to be movable along the long holes 34 and 38.

  Accordingly, when the far-side airbag 22 is inflated and deployed, the first link member 32 and the second link member 36 follow the inflation and deployment of the far-side airbag 22 and move forward toward the vehicle body centering on the connector 40. The other side portions 32B and the other end portion 36B are rotated in directions opposite to each other (the direction in which the other end portion 32B and the other end portion 36B approach each other), and are arranged substantially along the diagonal line of the side surface portion 22A of the far side airbag 22.

  That is, the restriction member 30 (the first link member 32 and the second link member 36) in the present embodiment has no problem of sliding along the side surface portion 22A when the far side airbag 22 is inflated and deployed. The side airbag 22 is projected to the front side of the vehicle body by the regulating member 30 while its direction is regulated (variation in deployment in the vehicle width direction is suppressed).

  As described above, according to the regulating member 30 in the present embodiment, the behavior of the far side airbag 22 in the vehicle width direction at the time of inflation and deployment can be regulated, and the far side airbag 22 can be stably counteracted. Can generate power. That is, according to the restriction member 30, the reaction force of the far side airbag 22 at the time of inflation and deployment can be effectively received.

  Further, the first link member 32 and the second link member 36 constituting the restricting member 30 are disposed substantially along the diagonal line of the far side airbag 22, and the other end portions 32 </ b> B and 36 </ b> B thereof are side portions. It extends to the front upper end of the vehicle body and the lower front end of the vehicle front in 22A. Therefore, the far-side airbag 22 can effectively restrain the upper body of the seated occupant (maintain occupant restraint performance satisfactorily) while the behavior is stable.

  Further, since the restriction member 30 (the first link member 32 and the second link member 36) in the present embodiment is configured as described above, the far-side airbag 22 is stored in a folded state. There is also an advantage of compact storage so that the space in the longitudinal direction of the vehicle body is reduced during storage.

  As mentioned above, although the far side airbag apparatus 20 which concerns on this embodiment was demonstrated based on drawing, the far side airbag apparatus 20 which concerns on this embodiment is not limited to the thing of illustration, The design can be changed as appropriate without departing from the scope of the invention. For example, the regulating member 30 only needs to be provided with at least one of the first link member 32 and the second link member 36 (preferably the first link member 32).

  The other end portion 32B (the overhang portion 33) of the first link member 32 and the other end portion 36B (the overhang portion 37) of the second link member 36 are fixed to the pocket portion 23 of the far side airbag 22, respectively. It is not limited to the configuration. That is, each of the other end portions 32B and 36B (the overhang portions 33 and 37) may move somewhat in each pocket portion 23 when the far-side airbag 22 is inflated and deployed, so that it does not fall out of each pocket portion 23. It only has to be attached.

  Further, the far-side airbag 22 is not limited to one that is inflated and deployed in a rectangular shape when viewed from the side in the vehicle width direction. Therefore, the first link member 32 and the second link member 36 are not limited to the configuration arranged substantially along the diagonal line of the far-side airbag 22, and the other end portions 32 </ b> B and 36 </ b> B are disposed on the far side. It is not limited to the structure extended to the vehicle body front side upper end part and vehicle body front side lower end part of the airbag 22. FIG.

  However, the far-side airbag 22 is inflated and deployed in a rectangular shape as viewed from the vehicle width direction, and the first link member 32 and the second link member 36 are substantially along the diagonal line of the far-side airbag 22. It is desirable that the other end portions 32B and 36B extend to the vehicle body front side upper end portion and the vehicle body front side lower end portion of the far side airbag 22 because it becomes more effective.

14 seat back 14A side part 16 seat back frame 16A side frame (side part)
20 Far-side airbag device (vehicle side airbag device)
22 Far-side airbag (side airbag)
26 inflator 30 restricting member 32 first link member 36 second link member

Claims (2)

An inflator that generates gas when activated;
In the folded state, it is stored in the side part of the seat back frame, and the gas generated from the inflator is supplied, so that it is rectangular in a side view as viewed from the vehicle width direction from the side part of the seat back to the front side of the vehicle body. A side airbag that inflates and expands into a shape and restrains the occupant;
One end portion is pivotally supported on the lower side of the side portion of the seat back frame, and the other end portion extends to a position reaching the vehicle body front upper end portion of the side airbag. A first link member attached to the side of the seat back frame, and one end portion is rotatably supported on the upper side of the side portion of the seat back frame, and the other end portion reaches the vehicle body front side lower end portion. A second link member that is extended and attached to the lower end on the front side of the vehicle body , and a restriction member,
A vehicle side airbag device comprising: The first link member and the second link member are disposed substantially along a diagonal of the side airbag as viewed from the side of the vehicle width when the side airbag is inflated and deployed. The vehicle side airbag device according to claim 1.

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