JP6032157B2 - Crew restraint system - Google Patents

Description

  The present invention relates to an occupant restraint device.

  There is known an occupant restraint device in which an airbag provided in a support portion for a seat cushion of a buckle is inflated so as to fill a space formed between a lap belt portion, a buckle and a seat cushion at the time of a collision. (For example, refer to Patent Document 1).

JP 2007-223524 A

  In the above configuration, the airbag is configured to be inflated only between the lap belt portion, the buckle, and the seat cushion, and from the viewpoint of restricting the upper body of the occupant to the buckle side in the seat width direction by the airbag. There is room for improvement.

  An object of the present invention is to obtain an occupant restraint device that can effectively restrict a seated occupant of a vehicle seat from moving to a buckle side in the seat width direction due to a vehicle collision.

An occupant restraint device according to a first aspect is provided on a side with respect to a vehicle seat and supports a buckle of a seat belt device, and overlaps with the support member in a side view on the vehicle seat side with respect to the support member. And a side airbag device including an airbag that is inflated by a gas supply and is deployed laterally from a waist portion to a chest portion of a seated occupant of the vehicle seat.

  In this occupant restraint device, when gas is supplied to the airbag during a vehicle collision, the airbag is inflated and deployed. This airbag restricts the movement of the seated occupant to the buckle side while contacting the seated occupant in a wide range from the waist to the chest and supporting the reaction force by the support member. For this reason, the movement of the seated occupant to the buckle side is effectively limited by the airbag as compared with the configuration including the airbag deployed on the side of the waist.

Thus, in the passenger | crew restraint apparatus of a 1st aspect , it can restrict | limit effectively that the seating passenger | crew of a vehicle seat moves to the buckle side of a seat width direction resulting from a vehicle collision.

The occupant restraint device according to the second aspect is configured such that, in the configuration of the first aspect , the airbag is deployed under the buckle side armpit of the seated occupant.

The occupant restraint system of this, the air bag by the gas supply, is deployed in a range extending waist of the occupant, from the chest to the armpit vicinity of the buckle. For this reason, for example, in a collision mode in which the seated occupant moves obliquely forward toward the buckle, the airbag restricts the seated occupant from moving obliquely forward in such a posture that the upper body is twisted.

In the occupant restraint device according to the third aspect, in the configuration of the first or second aspect , the seat belt of the seat belt device is configured such that one side with respect to the buckle is a shoulder belt portion attached to the upper body of the seated occupant. The other side with respect to the buckle is a lap belt portion to be attached to the waist of the seated occupant, and the airbag has a portion that is deployed on the shoulder occupant side with respect to the shoulder belt portion and the lap belt portion.

In the occupant restraint apparatus This airbag is arranged between the shoulder belt portion and the occupant has a portion that is deployed between the lap belt portion and the occupant. For this reason, since the airbag is in contact with the seated occupant over a larger area and the reaction force is supported by the shoulder belt portion and the lap belt portion, the seated occupant of the vehicle seat moves to the buckle side in the seat width direction. Is more effectively limited.

The occupant restraint device according to a fourth aspect is the configuration according to any one of the first to third aspects , wherein the support member is swingable about an axis line having a seat width direction as an axial direction with respect to the vehicle seat. The side airbag device is coupled to the vehicle seat, and is supported by the support member.

The occupant restraint system of this, the attitude for the vehicle seat of the buckle is adjusted by the support member swings to a vehicle seat. The side airbag device is supported by a support member and follows the swinging of the support member. For this reason, the reaction force of the airbag can be supported by the support member regardless of the attitude of the support member with respect to the vehicle seat.

The occupant restraint device according to a fifth aspect is the configuration according to any one of the first to third aspects , wherein the support member is capable of swinging around an axis whose axial direction is a seat width direction with respect to the vehicle seat. The side airbag device is coupled to the vehicle seat, and the side airbag device allows the support member to swing around the axis with respect to the vehicle seat, and the support member in a side view in the entire range of the swing. Are supported by the vehicle seat so as to overlap with each other.

The occupant restraint system of this, the attitude for the vehicle seat of the buckle is adjusted by the support member swings to a vehicle seat. The side airbag device supported by the vehicle seat is disposed so as to overlap the support member in a side view within a swing range of the support member with respect to the vehicle seat. For this reason, the reaction force of the airbag can be supported by the support member regardless of the attitude of the support member with respect to the vehicle seat.

The occupant restraint device according to a sixth aspect is the configuration according to any one of the first to fifth aspects , wherein the occupant restraint device is expanded by gas supply and is laterally or obliquely on the buckle side in the seat width direction with respect to the head of the seated occupant A head airbag device including a head airbag deployed forward is further provided.

In the occupant restraint apparatus of this is the side airbag contacts the buckle in the sheet width direction portion extending chest from the occupant's waist, head airbag from the buckle in the sheet width direction to the head of the seated crew Contact. For this reason, it is possible to more effectively restrict the seated occupant of the vehicle seat from moving to the buckle side in the seat width direction and the posture change of the seated occupant.

In the occupant restraint device of the seventh aspect, in the configuration of the sixth aspect , the head airbag device is provided in a seat back of the vehicle seat.

In the occupant restraint apparatus of this, since the head airbag device is provided in the seat back, it does not easily shift relative positions of the seated occupant's head and the head airbag. For this reason, it is possible to effectively restrict the seated occupant's head from moving toward the buckle with a small-capacity head airbag.

An occupant restraint device according to an eighth aspect is the configuration according to the sixth or seventh aspect , wherein the head airbag is in contact with another vehicle seat adjacent to the vehicle seat in the vehicle width direction when deployed. Has been.

The occupant restraint system of this, the head airbag while being supported reaction force by contact with an adjacent vehicle seat, the occupant of the vehicle seat is restricted from moving to the buckle in the sheet width direction. For this reason, the head airbag effectively restricts the seated occupant's head from moving toward the buckle side in the seat width direction.

  As described above, the occupant restraint device according to the present invention is excellent in that the seated occupant of the vehicle seat can effectively limit the movement to the buckle side in the seat width direction due to the vehicle collision. Have

1 is a partially cutaway front view schematically showing a state in which a buckle airbag is deployed in an occupant restraint device according to a first embodiment of the present invention. It is a figure which shows the buckle airbag apparatus which comprises the passenger | crew restraint apparatus which concerns on the 1st Embodiment of this invention, Comprising: (A) is an expansion perspective view which expands and shows an external appearance, (B) is FIG. 2 (A). It is an expanded sectional view along line 2B-2B. It is a flowchart which shows the control flow of the passenger | crew restraint apparatus which concerns on the 1st Embodiment of this invention. It is a top view which shows typically the movement locus | trajectory of the seated passenger | crew of the vehicle seat when the diagonal collision arises in the motor vehicle. It is a perspective view which shows typically the state by which the buckle airbag was expand | deployed in the passenger | crew restraint apparatus which concerns on the 2nd Embodiment of this invention. It is an expansion perspective view which expands and shows the buckle airbag device which constitutes the crew member restraint device concerning a 3rd embodiment of the present invention. It is a figure which shows the passenger | crew restraint apparatus which concerns on the 4th Embodiment of this invention, Comprising: (A) is a front view which shows typically the state by which the buckle airbag and the head airbag were expand | deployed, (B) is a head It is a top view which shows typically the state by which the part airbag was expand | deployed. It is the partially cutaway front view which shows the head airbag apparatus which comprises the passenger | crew restraint apparatus which concerns on the 4th Embodiment of this invention.

In the present specification, “first embodiment”, “third embodiment”, and “fourth embodiment” are “first reference example”, “second reference example”, and “fourth embodiment”. It shall be read as “third reference example”. In this specification, “second embodiment” is read as “embodiment”.
The passenger | crew restraint apparatus 10 which concerns on the 1st Embodiment of this invention is demonstrated based on FIGS. 1-4. It should be noted that arrows FR, arrow UP, and arrow OUT that are appropriately described in each figure indicate the front direction, the upward direction, and the vehicle width direction outside of the vehicle V to which the occupant restraint device 10 is applied. These directions substantially coincide with one side (left side) of the front direction, the upper direction, and the seat width direction of the vehicle seat 11 to which the occupant restraint device 10 is applied. Hereinafter, when using the front-rear direction and the up-down direction, unless otherwise specified, the front-rear direction of the automobile V and the up-down direction of the vehicle are indicated.

  The occupant restraint device 10 is configured such that a buckle airbag device 24 as a side airbag device is added to a three-point seat belt device 12. First, the configuration of the seat belt device 12 will be described, and then the configuration of the buckle airbag device 24 will be described.

(Configuration of three-point seat belt device)
FIG. 1 is a front view showing a use state (mounted state) of an occupant restraint device 10 applied to a vehicle seat 11 as a seat. Here, the vehicle seat 11 in the present embodiment is arranged offset to the left side with respect to the center line in the vehicle width direction of the applied vehicle V, and is a driver seat or a passenger seat. As shown in FIG. 1, the seat belt device 12 includes a seat belt 13, an anchor plate 14, a retractor 16, a shoulder anchor 18, a buckle 20, and a tongue plate 22. .

  The seat belt 13 is wound so that one end in the longitudinal direction is coupled to the anchor plate 14 and the other end in the longitudinal direction can be pulled out by the retractor 16. In this embodiment, the anchor plate 14 is fixed to the side portion of the seat cushion 11A (the frame thereof) on the outer side in the vehicle width direction with respect to the rear portion of the seat cushion 11A of the vehicle seat 11. The retractor 16 has a pretensioner function that forcibly winds up the seat belt 12 by being actuated at the time of, for example, various types of collision described later. Further, the retractor 16 is fixed to a lower portion of a center pillar (not shown) outside the vehicle seat 11 in the vehicle width direction with respect to the seat back 11B. The retractor 16 may be fixed to the frame of the seat back 11B.

  The buckle 20 is supported on the inner side in the vehicle width direction with respect to the rear portion of the seat cushion 11A via a support plate 20A as a support member so that the front and rear positions can be adjusted. Specifically, the lower end of the sheet metal support plate 20A with the buckle 20 fixed to the upper end side is the axis 20B along the vehicle width direction with respect to the rear portion of the seat cushion 11A (the frame thereof) (FIG. 2A). (Refer to Fig.1). The back-and-forth position of the buckle 20 according to the physique of the occupant P, the reclining angle of the seat back 11B, and the like is adjusted by the swing of the support plate 20A around the axis 20B.

  A tongue plate 22 into which the seat belt 13 is inserted so as to be slidable in the longitudinal direction of the seat belt 13 can be locked and unlocked on the buckle 20. Then, by engaging the tongue plate 22 with the buckle 20, the seat belt 13 is mounted on a seated occupant P (hereinafter simply referred to as “occupant P”) seated on the vehicle seat 11 as shown in FIG. 1. It has become.

  In this mounted state, a portion from the shoulder anchor 18 to the buckle 20 in the seat belt 13 is a shoulder belt portion 13A, and a portion from the buckle 20 to the anchor plate 14 in the seat belt 13 is a lap belt portion 13B. That is, the seat belt 13 has a shoulder belt portion 13A on one side with respect to the buckle 20 and a lap belt portion 13B on the other side with respect to the buckle 20.

  The shoulder belt portion 13A is attached to the upper body (upper body) of the occupant P diagonally from the front shoulder S of the occupant P in the vehicle width direction to the waist L of the occupant in the vehicle width direction, and the upper body is used for the vehicle. The seat 11 (seat back 11B) is restrained. The lap belt portion 13 </ b> B is attached to the lumbar portion L of the occupant P from the front upper side, and restrains the lumbar portion L to the vehicle seat 11. Note that the symbol H indicates the head of the passenger P.

  As described above, the seat belt device 12 constituting the occupant restraint device 10 is configured to function as a general three-point seat belt device.

(Configuration of buckle airbag device)
In the configuration described above, the occupant restraint device 10 includes the buckle airbag device 24 disposed on the buckle 20 side of the seat belt device 12 with respect to the vehicle seat 11. In this embodiment, the buckle airbag device 24 is supported by the support plate 20A or the buckle 20 so as to follow the swing around the axis 20B of the support plate 20A constituting the buckle 20.

  Specifically, as shown in FIGS. 2 (A) and 2 (B), the buckle airbag device 24 includes a case 26, a buckle airbag 28 as a side airbag, and an inflator 30 that are modularized. In this state, it is supported by the support plate 20A.

  When supplementing about the support structure by this support plate 20A, the stud bolt 30A of the inflator 30 arrange | positioned in the buckle airbag 28 has penetrated the buckle airbag 28, the case 26, and the support plate 20A. When the nut 32 is screwed onto the stud bolt 30A, the buckle airbag device 24 is supported by the support plate 20A so as to follow the swing of the support plate 20A around the axis 20B. In the configuration including a diffuser that controls the gas supply direction from the inflator 30 to the buckle airbag 28, a stud bolt 30A may be provided in the diffuser instead of the inflator 30.

  The buckle airbag 28 is folded in the case 26 so as to be flat in the vehicle width direction. The folded buckle airbag 28 is disposed so as to overlap the support plate 20A in a side view. The folded buckle airbag 28 is inflated by gas supply from the inflator 30 and is deployed on the buckle 20 side of the vehicle seat 11 with respect to the passenger P, that is, on the inner side in the vehicle width direction. This development mode (shape) will be described later. The inflator 30 is of a combustion type or a cold gas type, and is configured to supply gas into the buckle airbag 28 when operated by a command of a collision ECU 34 described later.

  The case 26 is made of resin, has a flat box shape in the vehicle width direction, and covers the buckle airbag 28 and the inflator 30. The case 26 has a base wall 26 </ b> A that is fastened between the inflator 30 and the nut 32 through the stud bolt 30 </ b> A described above through the wall portion on the inner side in the vehicle width direction.

  On the other hand, a tear line 26 </ b> B is formed on the seat occupant side wall or the upper wall facing the base wall 26 </ b> A in the case 26, which triggers the tearing of the buckle airbag 28 due to the inflation pressure. FIG. 2B shows an example in which a tear line 26B is formed on a wall facing the base wall 26A as an example. When the case 26 is cleaved at the tear line 26 </ b> B by the inflation pressure of the buckle airbag 28, the buckle airbag 28 is deployed toward the passenger P side of the vehicle seat 11.

  Hereinafter, the deployment form of the buckle airbag 28 will be described. 2B, the base end of the buckle airbag 28 is on the vehicle seat 11 (occupant P) side with respect to the support plate 20A (and the buckle 20) to which the inflator 30 is fixed. It is a configuration that is deployed. In this deployed state, a part of the lower end side of the buckle airbag 28 is configured to maintain a state of overlapping with the support plate 20A in a side view by the support structure by the stud bolt 30A. In other words, the lower portion of the buckle airbag 28 may be regarded as a configuration that is deployed between the inner end of the lap belt portion 13B in the vehicle width direction and the waist L of the occupant P. Thus, the buckle airbag 28 is configured such that the reaction force is supported (received) by the support plate 20A when the occupant P moving in a direction including the inward component in the vehicle width direction is supported (restrained). Yes.

  The buckle airbag 28 is deployed on the side of the occupant P including the portion from the waist L to the chest B of the occupant P. The chest B of the occupant P is a range where the occupant P has ribs. In this embodiment, the front end of the buckle airbag 28 in the deployed state is configured to reach the armpit F (the lower side of the base of the arm) on the right side (buckle 20 side) of the occupant P. When the vehicle seat 11 is a driver's seat, the buckle airbag 28 enters the armpit F of the occupant P holding the steering wheel. Further, when the vehicle seat 11 is a passenger seat, the buckle airbag 28 reaches the armpit F while pushing away the arm of the passenger P.

  The inflator 30 of the buckle airbag device 24 described above is electrically connected to a collision ECU 34 as a control device. In addition, a collision sensor 36 and a buckle switch 38 are electrically connected to the collision ECU 34. The collision sensor 36 is configured to output to the collision ECU 34 a signal corresponding to the presence or absence of a collision with the vehicle V and the form of the collision. The control of the inflator 30 by the collision ECU 34 will be described in the operation of this embodiment described later.

  In this embodiment, the collision sensor 36 outputs a signal corresponding to a full wrap frontal collision, an offset frontal collision, a minute lap collision, an oblique collision, and a side collision. The collision sensor 36 is configured to output a signal corresponding to the collision side (left or right) with respect to the vehicle V in the case of a minute lap collision, an oblique collision, or a side collision.

  Here, the minute lap collision is a collision in which the lap amount in the vehicle width direction with the collision partner prescribed by IIHS is 25% or less among the front collision of the automobile V, for example. For example, a collision to the outside in the vehicle width direction with respect to a front side member that is a vehicle body skeleton corresponds to a minute lap collision. In this embodiment, a minute lap collision at a relative speed of 64 km / hr is assumed as an example. Further, the oblique collision (MDB oblique collision, oblique collision) is, for example, an oblique front defined by NHSTA (for example, a collision with a relative angle of 15 ° with the collision partner and a lap amount of about 35% in the vehicle width direction). Is done. In this embodiment, an oblique collision at a relative speed of 90 km / hr is assumed as an example.

  The buckle switch 38 outputs a signal according to whether or not the tongue plate 22 is locked to the buckle 20, that is, whether or not the occupant P is wearing the seat belt 13. In this embodiment, the buckle switch 38 outputs an OFF signal when the tongue plate 22 is not locked to the buckle 20, and outputs an ON signal when the tongue plate 22 is locked to the buckle 20. It is said that.

(Function)
Next, the operation of the first embodiment will be described with reference to the flowchart shown in FIG.

  The collision ECU 34 configuring the occupant restraint device 10 having the above configuration determines whether or not an ON signal is input from the buckle switch 38 in step S10. When the occupant P of the vehicle seat 11 is wearing the seat belt 13, an ON signal is input from the buckle switch 38 to the collision ECU 34. If the determination is negative in step S10, step S10 is repeated until an affirmative determination is made.

  If the determination in step S10 is affirmative, the collision ECU 34 proceeds to step S12, and determines whether or not a collision with the vehicle V (inevitable) has been detected based on a signal from the collision sensor 36. If a negative determination is made in step S12, the process returns to step S10. On the other hand, if the determination in step S12 is affirmative, the process proceeds to step S14, where it is determined whether the collision mode is any one of a minute lap collision, an oblique collision, and a side collision. In this embodiment, the collision mode to the far side, which is the side (right side) opposite to the side (left side) where the vehicle seat 11 is installed in the automobile V, is any one of micro lap collision, oblique collision, and side collision. Occurrence is a condition that is affirmed in step S14.

  If a negative determination is made in step S14, the control is terminated. For example, in the case of a full lap frontal collision or an offset collision where the lap amount exceeds 25%, the control is terminated without the inflator 30 being operated. Further, in the case of a minute lap collision, an oblique collision, and a side collision on the installation side of the vehicle seat 11, the control is terminated without the inflator 30 being operated. In each of these collision modes, the occupant restraint device 10 restrains and protects the occupant mainly by the seat belt 13 (and other airbag devices not shown).

  If the determination in step S14 is affirmative, the collision ECU 34 proceeds to step S16, activates the inflator 30, and ends the control. The activated inflator 30 generates gas in the buckle airbag 28, and the buckle airbag 28 is inflated by supplying the gas. When the case 26 is cleaved at the tear line 26B by the inflation pressure of the buckle airbag 28, the buckle airbag 28 is deployed in a range from the waist L of the occupant P to the chest B.

  By the way, as shown in FIG. 4 (illustrated example is an example of an oblique collision by the barrier Br) in a minute lap collision and an oblique collision, the occupant P also moves forward with respect to the vehicle body and also moves to the collision side in the vehicle width direction. . In the side collision, the occupant P moves to the collision side in the vehicle width direction. The movement of the occupant P toward the collision side in the vehicle width direction (in the vehicle width direction that is the arrangement side of the buckle 20) is restricted by the deployed buckle airbag 28.

  For example, in the first comparative example that does not include the buckle airbag device 24, the movement of the occupant P toward the collision side (inside) in the vehicle width direction is limited only by the seat belt 13. In particular, the occupant P moves in such a posture that the upper body is twisted against a minute lap collision or an oblique collision in which the occupant P moves obliquely forward. In this posture, the upper body of the occupant P is a right part that is not restrained by the shoulder belt 13 </ b> A, and easily moves so that a part above the abdomen mainly falls forward. For this reason, the shoulder belt portion 13A may be detached from the shoulder portion S of the occupant P.

  Further, for example, in the second comparative example provided with a small airbag deployed on the buckle side with respect to the waist L of the occupant P, the airbag mainly restrains the waist L from the side.

  On the other hand, in the occupant restraint device 10, the buckle airbag 28 deployed as described above has the reaction force supported by the support plate 20 </ b> A whose lower end portion overlaps in a side view, from the waist L to the chest. Contact the occupant P over a wide range from B to B. Thereby, the movement of the occupant P toward the collision side (in the vehicle width direction) is effectively limited by the buckle airbag 28.

  Thus, in the occupant restraint device 10 according to the first embodiment, it is possible to effectively restrict the occupant P seated on the vehicle seat 11 from moving to the collision side (inside) in the vehicle width direction.

  Further, when the buckle airbag 28 contacts the occupant P in a wide range from the waist L to the chest B (in a range including the upper side of the abdomen), the upper body of the occupant P in the case of a minute wrap collision or an oblique collision. Twisting is suppressed. Thereby, it is suppressed that shoulder belt part 13A comes off from shoulder part S of crew member P. In particular, since the buckle airbag 28 is deployed to the armpit F on the inner side in the vehicle width direction of the occupant P, twisting of the upper body of the occupant P is further effectively suppressed. Thus, the proper posture of the occupant P with respect to the vehicle seat 11 is maintained, and the restraint of the occupant P by the seat belt 13 is ensured.

  Further, in the occupant restraint device 10, the buckle airbag device 24 is supported (fixed) on the support plate 20A. For this reason, even when the swing angle of the support plate 20A changes as the position of the buckle 20 is adjusted, the reaction force of the buckle airbag 28 is supported by the support plate 20A (the support plate 20A and the buckle airbag 28). Relative position). Therefore, regardless of the swing angle of the support plate 20A, the movement restriction and posture maintenance effect of the occupant P by the buckle airbag 28 can be obtained.

(Other embodiments)
Hereinafter, other embodiments of the present invention will be described. In addition, about the structure fundamentally similar to the structure of embodiment described previously, suppose that the code | symbol same as the structure of embodiment described previously is attached | subjected, and the description and illustration may be abbreviate | omitted.

(Second Embodiment)
FIG. 5 is a perspective view showing a deployed state of a buckle airbag 44 described later in the occupant restraint device 40 according to the second embodiment. As shown in this figure, the occupant restraint device 40 includes a buckle airbag device 42 instead of the buckle airbag device 24.

  The buckle airbag device 42 includes a buckle airbag 44 instead of the buckle airbag 28. The buckle airbag 44 is different from the buckle airbag 28 in that the buckle airbag 44 has a portion that is deployed between the shoulder belt portion 13A and the lap belt portion 13B and the occupant P (deployment form). That is, the buckle airbag 44 is located between the shoulder belt portion 13A and the occupant P and between the lap belt portion 13B and the occupant P (front) from the side deployed from the waist L to the chest B of the occupant P. (See a cross-sectional shape 44S shown by an imaginary line in FIG. 5). Other configurations of the occupant restraint device 40 are the same as the corresponding configurations of the occupant restraint device 10 including portions not shown.

  Therefore, also by the passenger | crew restraint apparatus 40 which concerns on 2nd Embodiment, the same effect can be acquired by the effect | action similar to the passenger | crew restraint apparatus 10 fundamentally. Moreover, in the passenger | crew restraint apparatus 40, since the buckle airbag 44 contacts the passenger | crew P in a wider range, the attitude | position change (twist) of the passenger | crew P is suppressed more effectively. Further, since the buckle airbag 44 is supported by the reaction force by the shoulder belt portion 13A and the lap belt portion 13B (the tension thereof), in particular, the movement in the oblique direction toward the front and the inside in the vehicle width direction is effectively limited. Is done. As a result, the occupant restraint device 40 has higher occupant restraint performance against minute lap collisions and oblique collisions than the occupant restraint device 10.

(Third embodiment)
FIG. 6 is a perspective view showing a buckle airbag device 52 that constitutes an occupant restraint device 50 according to the third embodiment. As shown in this figure, the buckle airbag device 52 is different from the buckle airbag devices 24 and 42 in that it is not fixed to the support plate 20A.

  The buckle airbag device 52 includes a case 54 that houses the folded buckle airbag 28, an inflator 56 disposed outside the case 54, and a hose 58 that communicates the inflator 56 with the buckle airbag 28. It consists of In this embodiment, the buckle airbag device 52 is fixed to the seat cushion 11 </ b> A in the inflator 56. Specifically, the inflator 56 is fastened and fixed to the frame 11AF of the seat cushion 11A via a pair of front and rear brackets 60 in a posture that is long in the front-rear direction.

  In this embodiment, the rear bracket 60 is fixed to the case 54. In other words, the case 54 located outside the seat cushion 11A is fixed to the frame 11AF, which is a component inside the seat cushion 11A, via the rear bracket 60 whose one end protrudes outside the seat cushion 11A. ing.

  Further, the case 54 has a frame portion 54A. The frame portion 54A is formed in a rectangular frame shape surrounding the longitudinal insertion hole 54B in the front-rear direction, and the support plate 20A is inserted through the insertion hole 54B. The frame portion 54A is dimensioned so as not to interfere with the support plate 20A in the swing range around the axis 20B of the support plate 20A accompanying the position adjustment of the buckle 20. Thus, in the configuration in which the buckle airbag device 52 is supported by the seat cushion 11A, the swing of the support plate 20A with respect to the buckle airbag device 52 is allowed.

  The buckle airbag device 52 is located at a position where the buckle airbag 28 (the lower end side in the deployed state) overlaps the support plate 20A in a side view in the entire range of swinging around the axis 20B of the support plate 20A. It is supported by the seat cushion 11A. The frame portion 54A is configured to prevent the buckle airbag 28 from being displaced from the support plate 20A when the buckle airbag 28 is inflated and deployed.

  The other parts of the case 54 are basically configured in the same manner as the case 26. That is, the case 54 is configured to be allowed to deploy the buckle airbag 28 by being cleaved at a tear line (not shown) by the inflation pressure of the buckle airbag 28 that is inflated by the gas supply from the inflator 56. Other configurations of the occupant restraint device 50 are the same as the corresponding configurations of the occupant restraint device 10 including portions not shown.

  Therefore, the occupant restraint device 50 according to the third embodiment also basically has the same operation as the occupant restraint device 10 except for the operational effect of the buckle airbag device 24 being supported by the support plate 20A. Similar effects can be obtained. Further, in the occupant restraint device 50, the buckle airbag device 52 supported by the vehicle seat 11 is configured such that the lower end side of the buckle airbag 28 is the support plate 20A in the entire range of swinging of the support plate 20A relative to the vehicle seat 11. And overlap in side view. For this reason, the reaction force of the buckle airbag 28 can be supported by the support plate 20A regardless of the posture of the support plate 20A with respect to the vehicle seat 11.

  Moreover, since the relative position of the buckle airbag device 52 with respect to the seat cushion 11A is determined regardless of the adjustment position of the buckle 20, the setting (design) for deploying the buckle airbag 28 in a required form is easy.

  In the third embodiment, the case 54 is integrated with the inflator 56 via the bracket 60. However, the present invention is not limited to this. For example, the case 54 may be supported by the frame 11AF independently (individually) from the inflator 58.

  In the third embodiment, an example in which the buckle airbag device 52 includes the buckle airbag 28 is shown, but the present invention is not limited to this. For example, a configuration in which a buckle airbag 44 is provided instead of the buckle airbag 28 may be employed.

  Further, in the third embodiment, for example, the case 54 may be configured as a transmission member that transmits the load (reaction force) from the buckle airbag 28 to the support plate 20A, and for example, the case 54 (bracket 60) is counteracted. It is good also as a structure which shares and supports a part of force.

(Fourth embodiment)
FIG. 7A shows an occupant restraint device 70 according to the fourth embodiment in a front view corresponding to FIG. 1, and FIG. 7B shows the occupant restraint device 70 in a plan view. Is shown. As shown in these drawings, the occupant restraint device 70 is different from the occupant restraint devices 10, 40, and 50 in that a head airbag device 72 is provided in addition to the buckle airbag device 24. The head airbag device 72 is configured such that the head airbag 74 is deployed from the upper portion on the inner end side in the vehicle width direction of the seat back 11B toward the side of the head H of the occupant P. This will be specifically described below.

  As shown in FIG. 8, the head airbag 74 is housed in the upper portion of the seat back 11B on the inner end side in the vehicle width direction in the folded state. An inflator 76 is disposed in the head airbag 74, and the inflator 76 is fixed to a frame 11BF constituting the seat back 11B. Although illustration is omitted, a part of the mating portion of the skin material constituting the seat back 11B is sewn with a tear seam. This tear seam is configured to be broken by the inflation pressure of the head airbag 74 by the gas supply from the inflator 76. The head airbag 74 is deployed outside the seat back 11B through a tear seam break at the joint of the skin material of the seat back 11B.

  Further, as shown in FIGS. 7A and 7B, the deployed head airbag 74 may be referred to as a right seat 77 adjacent to the vehicle seat 11 (hereinafter referred to as “neighboring seat 77”). ) In contact (interference) with the seat back 78. Accordingly, the head airbag 74 restrains the head H of the occupant P from the inside in the vehicle width direction while the reaction force is supported by the seat back 78 of the adjacent seat 77. Other configurations of the occupant restraint device 70 are the same as the corresponding configurations of the occupant restraint device 10 including portions not shown.

  Therefore, also by the passenger | crew restraint apparatus 70 which concerns on 3rd Embodiment, the same effect can be acquired by the effect | action similar to the passenger | crew restraint apparatus 10 fundamentally. Further, in the occupant restraint device 70, the buckle airbag 28 contacts the portion of the occupant P from the waist L to the chest B from the inside in the vehicle width direction, as shown in FIGS. 7 (A) and 7 (B). The part airbag 74 contacts the head H of the occupant P from the inside in the vehicle width direction. In particular, the head H which is the portion of the occupant P that moves the most in the configuration without the head airbag device 72 is restrained by the head airbag 74.

  As a result, the occupant restraint device 70 effectively restricts the occupant P of the vehicle seat 11 from moving to the collision side in the vehicle width direction. Further, the twist of the upper body of the occupant P is effectively suppressed in the case of a minute lap collision or an oblique collision.

  In particular, since the head airbag device 72 is provided in the seat back 11B, compared to a configuration (configuration included in the present invention) in which the head airbag device is provided in a portion other than the vehicle seat 11, The relative position between the head H of the occupant P and the head airbag 74 is difficult to shift. For this reason, the movement of the head H of the occupant P in the vehicle width direction can be more effectively restricted by the small-capacity head airbag 74.

  In addition, since the deployed head airbag 74 is in contact with the seat back 78 of the adjacent seat 77, the head airbag 74 is supported by the contact with the seat back 78, and the head of the occupant P is supported. Limit the movement of H inward in the vehicle width direction. For this reason, the movement of the head H of the occupant P inward in the vehicle width direction is more effectively limited by the head airbag 74.

(Modification)
In the fourth embodiment, an example in which the head airbag device 72 is provided in the seat back 11B is shown, but the present invention is not limited to this. For example, the head airbag device 72 may be provided on a roof, an overhead console, a center console, or the like. For example, the vehicle head 11 and the adjacent seat 77 have a common head airbag device 72. Also good. Further, for example, instead of the head airbag device 72, an air belt in which an inflating portion provided in the shoulder belt portion 13A is inflated and deployed by receiving gas supply may be employed. Further, the head airbag 74 is deployed obliquely forward (moving side in the case of an oblique collision or a minute lap collision) with respect to the head H, instead of being deployed at the same position in the front-rear direction with respect to the head H. It is good also as a structure.

  In the fourth embodiment, the occupant restraint device 70 is configured by the seat belt device 12, the buckle airbag device 24, and the head airbag device 72. However, the present invention is not limited to this. For example, the occupant restraint device 70 may be configured to include buckle airbag devices 42 and 52 instead of the buckle airbag device 24.

  Moreover, in each above-mentioned embodiment, although the example in which the buckle 20 was arrange | positioned inside the vehicle width direction was shown, this invention is not limited to this. For example, the present invention may be applied to a configuration in which the buckle 20 is disposed on the outer side in the vehicle width direction. In this case, the occupant P moves to the collision side (near side) in the vehicle width direction at the time of a minute lap collision, an oblique collision, or a side collision on the side where the vehicle seat 11 is disposed (left side in the above embodiment). This is limited by the buckle airbag 28 or the like.

  Further, in each of the above-described embodiments, the example in which the occupant restraint devices 10, 40, 50, and 70 are applied to the driver's seat or the passenger seat is shown, but the present invention is not limited to this. For example, the occupant restraint devices 10, 40, 50, and 70 may be applied to a rear seat of a two-row seat layout or a second row or a third row seat of a three-row seat layout.

  Furthermore, in each of the above-described embodiments, the example in which the support plate 20A is coupled to the rear portion of the vehicle seat 11 so as to be swingable about the axis 20B is shown, but the present invention is not limited to this. For example, the support plate 20A may be coupled to the body-side structure portion so as to be swingable about the axis 20B, or the support plate 20A may be configured not to swing.

  In addition, it goes without saying that the present invention can be variously modified and implemented without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 10 Crew restraint apparatus 11 Vehicle seat 11B Seat back 12 Seat belt apparatus 13A Shoulder belt part 13B Lap belt part 20 Buckle 20A Support plate (support member)
24 Buckle airbag device (side airbag device)
28 Buckle Airbag (Airbag)
40, 50, 70 Occupant restraint device 42, 52 Buckle airbag device (side airbag device)
44 Buckle airbag (airbag)
72 Head Airbag Device 74 Head Airbag

Claims (7)

A support member provided on a side of the vehicle seat and supporting a buckle of the seat belt device;
In the case of a minute lap collision or an oblique collision on the side of the vehicle seat with respect to the support member that overlaps with the support member in a side view and to the opposite side of the vehicle seat installation side in the vehicle width direction A side airbag device including an airbag inflated by gas supply and deployed laterally from the waist to the chest of the seated occupant of the vehicle seat;
With
The seat belt of the seat belt device includes a shoulder belt portion on one side with respect to the buckle that is mounted on the upper body of the seated occupant, and a lap belt portion on the other side with respect to the buckle that is mounted on the waist portion of the seated occupant. Has been
The airbag is from the side deployed from the waist to the chest of the seated occupant, in front of the seated occupant, between the shoulder belt portion and the seated occupant, and between the lap belt portion and the seated occupant. An occupant restraint device having a portion that is deployed to wrap around.   The occupant restraint device according to claim 1, wherein the airbag is configured to be deployed under an armpit on the buckle side of the seated occupant. The support member is coupled to the vehicle seat so as to be able to swing around an axis whose axial direction is the seat width direction with respect to the vehicle seat,
The occupant restraint device according to claim 1, wherein the side airbag device is supported by the support member. The support member is coupled to the vehicle seat so as to be able to swing around an axis whose axial direction is the seat width direction with respect to the vehicle seat,
The side airbag device allows the support member to swing around the axis with respect to the vehicle seat, and is disposed so as to overlap the support member in a side view in the entire range of the swing. The occupant restraint device according to claim 1, wherein the occupant restraint device is supported by the vehicle seat.   The head airbag device further comprising a head airbag that is inflated by gas supply and is deployed on the side of the buckle in the seat width direction or obliquely forward with respect to the head of the seated occupant. The occupant restraint device according to any one of claims 4 to 5.   The occupant restraint device according to claim 5, wherein the head airbag device is provided on a seat back of the vehicle seat.   The occupant restraint device according to claim 5 or 6, wherein the head airbag is configured to contact another vehicle seat adjacent to the vehicle seat in a vehicle width direction in a deployed state.

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