JP2007125937A - Air belt device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air belt device for a vehicle capable of properly absorbing the inertia at an occupant's head at the time of collision. <P>SOLUTION: This device has a webbing 16 for restraining an occupant corresponding to a chest 14B of an occupant 14, and an expansion part 20 for protecting a head and a neck installed to the webbing 16 for restraining the occupant and arranged along a front face of a headrest 28 at the time of expansion. Then, when collision of the vehicle is detected, the expansion part 20 for protecting the head and the neck is developed between a head 14H and the headrest 28 along the front face of the headrest 28, so that a backward inertia of the head 14H can be received and absorbed by the expansion part 20 for protecting the head and the neck. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular air belt apparatus having an inflating portion provided on an occupant restraining webbing.

As a conventional vehicular airbelt device, a vehicular airbelt device in which an inflating portion provided on an occupant restraining webbing corresponds to the head and neck of the occupant has been proposed (see Patent Document 1). In this vehicle airbelt device, the protection performance is improved by softly restraining the head and neck of the occupant who wants to move forward or left and right by the inertial force at the time of collision with the inflating part.
JP 2002-316615 A

  However, in this vehicle air belt device, when the inertial force of the occupant's head is large, for example, when the head moves to the rear side of the vehicle due to a reaction force at the time of a frontal collision, the head hits the headrest, and the headrest Since inertial force is absorbed, there are restrictions on the thickness of the headrest or the material used for the headrest.

  In view of the above-described facts, an object of the present invention is to provide a vehicular air belt device that can appropriately absorb the inertial force of an occupant's head during a collision.

  The invention of claim 1 has an occupant restraining webbing corresponding to the chest of the occupant, and an inflating part for protecting the head and neck that is provided on the occupant restraining webbing and inflates along the front surface of the headrest. It is characterized by.

  In the vehicle airbelt device according to claim 1, an occupant restraining webbing corresponding to the chest of the occupant, an inflating part for protecting the head and neck provided on the occupant restraining webbing and inflating along the front surface of the headrest, Therefore, when the so-called rebound occurs, the head / neck protection inflating part moves along the front surface of the headrest. Expansion between the headrest and the headrest can prevent the occupant head from moving backward due to inertial force, and the occupant head can be prevented from coming into direct contact with the headrest. In other words, a vehicle air belt device capable of receiving and appropriately absorbing the inertia force of the occupant's head by an inflating portion for protecting the head and neck that expands between the occupant's head and the headrest at the time of a collision is provided. be able to.

  According to a second aspect of the present invention, in the vehicular inflatable belt device according to the first aspect, the vehicular restraint webbing has a chest protection inflatable portion corresponding to the chest of the occupant when inflated.

  In the vehicle air belt device according to claim 2, in addition to the head / neck protection inflating portion, the vehicle air belt device has a chest protection inflating portion corresponding to the chest of the occupant when inflated. Moreover, not only can the inertial force of the occupant's head be absorbed appropriately, but also the burden on the occupant's chest can be reduced. Further, by dividing the inflating portion in this way, it is possible to arbitrarily control the deployment of the head / neck protecting inflating portion and the chest protecting inflating portion according to the collision mode, for example, the chest protecting inflating portion. Controls such as expanding only the head, expanding only the head / neck protecting inflatable part, and further expanding the chest protecting inflating part and then expanding the head / neck protecting inflating part. Is possible.

  According to a third aspect of the present invention, in the vehicular airbelt device according to the second aspect, the head / neck protection inflating portion is provided in advance along the front surface of the headrest or the headrest stay when the chest protection inflating portion is attached. It is characterized by being arranged.

  In the vehicle air belt device according to claim 3, since the head / neck protection inflating portion is disposed along the front surface of the headrest or headrest stay in advance when the chest protection inflating portion is mounted, Regardless of the form of expansion of the neck protection inflating part, the inertial force that causes the passenger's head to move backward can be reliably absorbed by the head / neck protecting inflating part.

  According to a fourth aspect of the present invention, in the vehicular airbelt device according to any one of the first to third aspects, the head / neck protecting inflatable portion is provided at both ends of the occupant restraining webbing. It is characterized by being used for the rear part of the occupant.

  In the vehicle air belt device according to claim 4, since both ends of the head / neck protection inflating portion are provided on the occupant restraining webbing for mounting the rear portion of the occupant, the vehicle air belt device is mounted. In doing so, the head / neck protecting inflatable portion can be routed behind the occupant head, that is, between the occupant head and the headrest. For this reason, the inertia force which moves a passenger | crew's head backward can be reliably absorbed by the expansion part for head / neck protection irrespective of the form of expansion | deployment of a head / neck protection expansion part.

  According to a fifth aspect of the present invention, in the vehicular airbelt device according to any one of the first to fourth aspects, the occupant restraining webbing is movably guided by a belt guide provided on the occupant seat. The head / neck protecting inflatable portion is provided closer to the occupant side than the belt guide.

  In the vehicle air belt device according to claim 5, the occupant restraining webbing is movably guided by the belt guide provided on the occupant seat, and the head / neck protecting inflating portion is more than the belt guide. The position of the inflating portion for protecting the head and neck in the occupant restraining webbing is positioned corresponding to the position of the belt guide. For this reason, the head / neck protecting inflatable part does not expand behind the belt guide, and the head / neck protecting inflating part is on the occupant side of the belt guide, for example, the occupant head and the headrest. Deploy securely between.

  In addition, since the belt guide is provided, for example, on the seat back of the occupant's seat, the belt guide and the head / neck protection inflating portion are also changed if the seat front / rear position or the seat back inclination angle is changed according to the occupant. It follows the front / rear position of the seat and the inclination angle of the seat back. For this reason, the head / neck protecting inflatable portion can always be deployed to an appropriate position between the occupant's head and the headrest regardless of the seat front-rear position and the seat back inclination angle.

  According to a sixth aspect of the present invention, in the vehicle air belt device according to any one of the first to fifth aspects, the vehicle includes an adjusting means for adjusting a length of the occupant restraining webbing.

  In the vehicle inflatable belt device according to claim 6, since the adjusting means for adjusting the length of the occupant restraining webbing is provided, the head / neck protecting inflating part is fixed on the occupant restraining webbing. Even so, the length of the occupant restraint webbing can be adjusted in advance by the adjusting means, so that the head and neck can be securely moved to an appropriate position between the occupant's head and the headrest according to the occupant's physique. The expansion part for part protection can be developed.

  As described above, according to the vehicle airbelt device of the first aspect of the present invention, the head / neck protecting inflating portion that inflates between the head of the occupant and the headrest at the time of collision causes the occupant's head. An excellent effect is obtained that it is possible to provide a vehicle air belt device capable of appropriately absorbing the inertial force of the portion.

  According to the vehicle air belt device according to claim 2, when the vehicle collides, not only can the inertial force of the occupant's head be properly absorbed, but also the burden on the occupant's chest can be reduced. Effect.

  According to the air belt device for a vehicle according to claim 3, the inertial force for moving the occupant's head backward is applied to the inflatable portion for protecting the head and neck, regardless of the form of expansion of the inflatable portion for protecting the head and neck. Thus, an excellent effect that it can be absorbed reliably is obtained.

  According to the vehicle air belt device according to claim 4, when the vehicle air belt device is mounted, the head / neck protection inflating portion is disposed on the rear side of the occupant head, that is, between the occupant head and the headrest. The inertial force that moves the occupant's head backward is reliably absorbed by the head / neck protection expansion part regardless of the form of deployment of the head / neck protection expansion part. The excellent effect of being able to be obtained is obtained.

  According to the vehicle air belt device according to claim 5, for example, the occupant head and the headrest that are on the occupant side of the belt guide without expanding the head / neck protection inflating portion behind the belt guide. An excellent effect that it can be surely deployed between the two is obtained.

  According to the vehicle air belt device of the sixth aspect, the length of the occupant restraining webbing is adjusted in advance by the adjusting means, so that the head and neck can be surely moved to an appropriate position between the occupant head and the headrest. The excellent effect that the expansion part for part protection can be developed is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
1 to 3, a vehicle air belt device 10 according to the present embodiment is a type of seat belt for restraining an occupant 14 seated on an occupant seat 12, and includes an occupant restraining webbing 16 and chest protection. The expansion part 18 for a head, the expansion part 20 for head and neck protection, and the retractor 22 which is an example of an adjustment means are provided.

  The occupant seat 12 includes a seat cushion 24 having a seat frame 32 on which the occupant 14 sits, a seat back 26 that supports the back 14A of the occupant 14, and a headrest 28 provided on the upper portion of the seat back 26. And is slidable on the seat rail 30 provided on the floor panel 25 in the vehicle front-rear direction.

  A lap belt anchor 34 is mounted on the outer side of the seat frame 32 and a buckle device 36 is pivotally mounted on the inner side of the seat frame 32 so as to be swingable in the vehicle front-rear direction. A belt guide 42 for guiding the movement of the occupant restraining webbing 16 is provided on the shoulder portion of the seat back 26 outside the passenger compartment. Note that the height of the belt guide 42 may be appropriately adjusted without fixing. In the buckle device 36, an expansion source of the chest protecting inflating portion 18 and the head / neck protecting inflating portion 20, for example, a dual stage inflator capable of instantaneously ejecting a large amount of gas at two stages of pressure ( (Not shown) is provided.

  The occupant restraining webbing 16 is a belt-like member corresponding to the chest 14B of the occupant 14 and is configured to be wound around the retractor 22, and is pulled out from the retractor 22 according to the physique of the occupant 14 when the vehicle air belt device 10 is mounted. Be able to. A tongue plate 38 that can be fitted to the buckle device 36 is provided at the tip of the passenger restraining webbing 16. Between the tongue plate 38 and the lap belt anchor 34, a lap belt 40 corresponding to the waist of the occupant 14 is provided.

  The lap belt 40 and the occupant restraining webbing 16 may be configured as a single webbing so that the tongue plate 38 can be moved according to the physique of the occupant 14, or the lap belt 40 and the occupant restraining webbing may be used. When 16 is fixed to the tongue plate 38 separately, a lap belt retractor for adjusting the length of the lap belt 40 may be provided at the position of the lap belt anchor 34.

  The chest protection inflating portion 18 is provided on the occupant restraining webbing 16 and is a bag corresponding to the chest 14B of the occupant when inflated. As shown in FIG. The sewing machine is sewn using a control sewing, that is, a so-called tear seam (not shown) that is broken when an internal pressure of a certain level or more is applied. As shown in FIG. When gas is supplied from the inflator in the buckle device 36 through the tongue plate 38, the tear seam breaks and expands from the folded state to the bag state. The chest protecting inflatable portion 18 may be provided so as to overlap the occupant restraining webbing 16 extending from the retractor 22 to the tongue plate 38. Further, an inflating portion 18 for protecting the chest may be connected to the end of the occupant restraining webbing 16. That is, a portion of the occupant restraining webbing 16 that corresponds to the chest 14 </ b> B of the occupant 14 may be replaced with the chest protection inflating portion 18.

  The head / neck protecting inflatable portion 20 is provided on the occupant restraining webbing 16 and protects at least one of the occupant head 14H (hereinafter simply referred to as “head 14H”) and the neck 14N during inflation. In addition, the bag body is inflated toward the inside of the vehicle along the front surfaces of the headrest 28 and the headrest stay (not shown), and for normal use, for example, an expansion for chest protection so as to have an equivalent width of the occupant restraining webbing 16. It is sewed using a tear seam 44 (FIGS. 7, 8, and 9) that is folded into the portion 18 and breaks when a constant internal pressure is applied. As shown in FIG. For example, when gas is supplied from the inflator in the buckle device 36 to the chest protection inflating portion 18 through the tongue plate 38 and the internal pressure of the chest protection inflating portion 18 reaches a certain pressure, the test is performed. Ashimu 44 is broken, and is configured to deploy a bag-shaped into between the head portion 14H and the headrest 28.

  The head / neck protecting inflatable portion 20 is provided closer to the occupant 14 than the belt guide 42 in the chest protecting inflating portion 18, and is deployed between the head 14H and the headrest 28. Specifically, when the vehicle air belt device 10 is mounted or when the head / neck protecting inflatable part 20 is deployed, the head / neck protecting inflating part 20 is positioned closer to the occupant 14 than the belt guide 42. As described above, the retracting amount of the occupant restraining webbing 16 is controlled by the retractor 22. Specifically, for example, the occupant restraining webbing 16 is moved by rotating a spool (not shown) of the retractor 22 in a winding direction or a pulling direction by a motor (not shown). The position of the neck protection inflating portion 20 is moved to the occupant 14 side of the belt guide 42. It is desirable that the head / neck protecting inflating portion 20 is widely deployed between at least one of the head 14H and neck 14N and the headrest 28 and headrest stay (not shown).

  The retractor 22 is a winding device for adjusting the length of the occupant restraining webbing 16, and is provided, for example, on a vehicle body (not shown) behind the belt guide 42 as shown in FIG. . The position where the retractor 22 is provided is not limited to this, and may be the back surface of the seat back 26, for example.

  The retractor 22 can wind up the occupant restraint webbing 16 within a predetermined range when the vehicle air belt device 10 is not mounted, and can pull out the occupant restraint webbing 16 when the vehicle air belt device 10 is mounted. In addition, when the occupant 14 is seated on the occupant seat 12 and the vehicle air belt device 10 is mounted, or when the head / neck protecting inflating part 20 is deployed, the head / neck protecting inflating is expanded. The pull-out amount of the occupant restraining webbing 16 can be controlled so that the portion 20 is positioned closer to the occupant 14 than the belt guide 42.

  In the present embodiment, the belt guide 42 is provided on the occupant seat 12, but the present invention is not limited to this, and the head / neck protecting inflatable part 20 is deployed between the head 14 </ b> H and the headrest 28. If so, the belt guide 42 may not be provided. In addition, the retractor 22 is given as an example of the adjusting means, but the position of the head / neck protecting inflating portion 20 can be controlled by configuring the position of the buckle device 36 so as to be controllable in the vehicle vertical direction and the vehicle width direction. You may make it adjust.

(Function)
During normal use where no collision has occurred in the vehicle, as shown in FIGS. 4 to 6, neither the chest protecting inflating portion 18 nor the head / neck protecting inflating portion 20 is deployed. Is seated on the occupant seat 12 and the lap belt 40 is applied to the waist, and the occupant restraining webbing 16 is pulled out of the retractor 22 via the belt guide 42 and applied to the chest 14B from the left shoulder, and the tongue plate 38 is attached to the buckle device 36. When fitted, the occupant 14 is restrained by the occupant seat 12 as a so-called three-point seat belt.

  At this time, the retractor 22 automatically winds or pulls out the occupant restraining webbing 16, and the head / neck protecting inflating portion 20 is positioned in front of the belt guide 42, that is, the head 14 H and the headrest 28. It adjusts to the position which can expand | deploy the expansion part 20 for head-and-neck protection.

  Here, when a frontal collision of the vehicle is detected by a front collision sensor (not shown), the inflator in the buckle device 36 immediately operates, and a large amount of the inflator 18 for chest protection passes from the buckle device 36 through the tongue plate 38. A large amount of gas is supplied at the first stage pressure. As a result, as shown in FIGS. 7 to 9, since the chest protection inflating portion 18 expands corresponding to the chest 14B of the occupant 14, the inertial force forward of the occupant 14 is applied to the chest protection inflating portion 18. Can be absorbed and absorbed.

  Next, in order to absorb the inertial force of the head 14H when the head 14H of the occupant 14 once moves forward due to a frontal collision and then returns backward, that is, the inertial force at the time of rebound, the inflator in the buckle device 36 is used. From the first stage into the chest protecting inflatable portion 18 at a second stage pressure, which is higher than the first stage. Then, as shown in FIGS. 1 to 3, the tear seam 44 is broken by the pressure, and the gas flows into the head / neck protecting inflating part 20, and the head / neck protecting inflating part 20. However, along the front surfaces of the headrest 28 and the headrest stay, the headrest 14H and the neck 14N are deployed toward the inside of the vehicle between the headrest 28 and the headrest stay.

  Thus, since the head / neck protecting inflating portion 20 inflates along the front surface of the headrest 28, the head 14H can be prevented from coming into direct contact with the headrest 28 when the occupant 14 rebounds. Can be received and absorbed by the expanding part 20 for protecting the head and neck. Since the rear end of the deployed position of the head / neck protecting inflatable portion 20 is limited by the belt guide 42, the head / neck protecting inflating portion 20 does not deploy behind the belt guide 42. , The head 14H and the neck 14N are securely deployed between the headrest 28.

  It should be noted that gas can be supplied independently from the inflator to the chest protecting inflating portion 18 and the head / neck protecting inflating portion 20, and the chest protecting inflating portion 18 and the head / You may make it control expansion | deployment of the expansion part 20 for neck protection. By doing in this way, it is also possible to expand only the head / neck protecting inflating part 20, for example.

  Further, in the vehicle airbelt device 10, in addition to the head / neck protection inflating portion 20, the vehicle airbelt device 10 has the chest protection inflating portion 18 corresponding to the chest 14 </ b> B of the occupant 14 when inflated, so that the vehicle collides. In this case, not only can the inertial force of the head 14H be appropriately absorbed, but also the burden on the chest 14B of the occupant 14 can be reduced.

  By dividing the inflating portion in this way, it is possible to arbitrarily control the development of the head / neck protecting inflating portion 20 and the chest protecting inflating portion 18 according to the collision mode. Control can be performed such that after the protective inflating portion 18 is deployed, the head / neck protecting inflating portion 20 is further deployed.

  Further, when gas is supplied independently to the chest protection inflating part 18 and the head / neck part inflating part 20, for example, only the chest protection inflating part 18 is deployed, It is also possible to control such that only the neck protecting inflating part 20 is deployed.

  In the vehicle air belt device 10, the occupant restraining webbing 16 is movably guided to a belt guide 42 provided on the occupant seat 12, and the head / neck protection inflating portion 20 is also connected to the belt guide 42. The head / neck protecting inflatable portion 20 of the occupant restraining webbing 16 is positioned so as to correspond to the position of the belt guide 42. The inflatable portion 20 does not expand behind the belt guide 42, and the head / neck protecting inflatable portion 20 is on the occupant 14 side of the belt guide 42, for example, between the head 14 H and the headrest 28. Deploy securely.

  Further, since the belt guide 42 is provided, for example, on the seat back 26 of the occupant seat 12, the belt guide 42 and the head / neck can be changed if the seat front / rear position or the inclination angle of the seat back 26 is changed according to the occupant 14. The part protecting inflating part 20 also follows the seat front-rear position and the inclination angle of the seat back 26. For this reason, the head / neck protecting inflatable portion 20 can always be deployed to an appropriate position between the head 14H and the headrest 28 regardless of the seat front-rear position or the inclination angle of the seat back 26.

  Further, since the vehicle air belt device 10 includes the retractor 22 that adjusts the length of the occupant restraining webbing 16, the head / neck protection inflating part 20 is fixed to the occupant restraint webbing 16. Even so, since the length of the occupant restraining webbing 16 can be adjusted in advance by the retractor 22, the head is surely moved to an appropriate position between the head 14H and the headrest 28 according to the physique of the occupant 14. The inflatable portion 20 for protecting the head and neck can be deployed.

  Since the head / neck protecting inflating portion 20 is deployed only at the time of a collision, it does not exist between the head 14H and the headrest 28 of the occupant 14 during normal use, and the occupant 14 is not in the head / neck. The air belt device 10 for a vehicle can be mounted as a seat belt without being aware of the presence of the inflatable portion 20 for protecting the head, and there is no inconvenience to the inflatable portion 20 for protecting the head and neck.

[Second Embodiment]
10, in the vehicle air belt device 50 according to the present embodiment, both end portions 52 and 54 of the head / neck protecting inflating portion 20 are provided on the occupant restraining webbing 16 so that the occupant 14 is attached to the rear portion. Has been. When the occupant restraining webbing 16 is mounted, the head / neck protecting inflatable portion 20 is positioned between at least one of the head 14H and the neck 14N of the occupant 14 and the headrest 28. It means that it is a site | part arrange | positioned.

  Specifically, the head / neck protecting inflatable portion 20 is connected to the chest protecting inflating portion 18 via a tear seam (not shown) at, for example, both end portions 52 and 54, and gas is supplied from the inflator. When a certain pressure or more is applied to the chest protection inflating portion 18, the tear seam is broken, and gas is also supplied into the chest protection inflating portion 18.

  As shown in the figure, the head / neck protecting inflatable part 20 is connected to the chest protecting inflating part 18 at both ends 52, 54, so that the chest protecting inflating part 18 and the head / neck protecting inflating part 18 are connected. Between the parts 20, for example, a slit 46 through which the occupant 14 can pass the head 14H is formed.

  That is, in the vehicle air belt device 50, the webbing 16A having the chest protecting inflating portion 18 and the webbing 16B having the head / neck protecting inflating portion 20 are provided. The headrest 28 can be arranged in advance between at least one of the 14H and the neck 14N.

  A belt guide (not shown) for guiding the passenger restraining webbing 16 may be provided on the passenger seat 12. By providing the belt guide, the webbings 16A and 16B can be bundled into one, and when the occupant restraining webbing 16 is mounted by the occupant 14, the height position of the end of the webbing 16B is lowered to the position of the belt guide. This is because the webbing 16B can be easily arranged on the rear side of the head 14H and the neck 14N of the passenger.

  Since other parts are the same as those of the first embodiment of the present invention, the same parts are denoted by the same reference numerals and description thereof will be omitted.

(Function)
During normal use where no collision has occurred in the vehicle, as shown in FIG. 10, neither the chest protecting inflating portion 18 nor the head / neck protecting inflating portion 20 is deployed, and the occupant 14 is used for the vehicle. Sitting on the air belt device 10, the lap belt 40 is applied to the lumbar region, the occupant restraining webbing 16 is pulled out of the retractor 22, and the webbing 16 </ b> A having the chest protection inflating part 18 is applied from the left shoulder to the chest 14 </ b> B. When the tongue plate 38 is fitted into the buckle device 36 through the portion 14H, the webbing 16B having the head / neck protection expanding portion 20 is disposed in advance between the head 14H and neck 14N and the headrest 28, And the passenger | crew 14 will be in the state restrained by the passenger | crew seat 12 by webbing 16A. At this time, as shown in the figure, the upper part of the head / neck protecting inflating part 20 is mainly located between the head 14H and neck 14N and the headrest 28, and the head / neck protecting inflating part 20 is located. The lower part of the part 20 is connected between the head 14H and neck 14N and the headrest 28 in front of the chest 14B and is connected to the chest protecting inflating part 18 at both end parts 54. It should be noted that the retractable length of the occupant restraining webbing 16 may be automatically adjusted by the retractor 22 when the vehicle air belt device 50 is mounted or when a collision occurs.

  Here, when a frontal collision of the vehicle is detected by a front collision sensor (not shown), the inflator in the buckle device 36 immediately operates, and a large amount of the inflator 18 for chest protection passes from the buckle device 36 through the tongue plate 38. A large amount of gas is supplied. When the pressure of the supplied gas is in the first stage, only the chest protection inflating portion 18 is deployed. Further, when the gas is supplied at the pressure of the second stage, the tear seams arranged at both end portions 52 and 54 of the head / neck protecting expansion portion 20 are broken, thereby protecting the head / neck. Gas also flows into the inflating part 20, and the inflating part 20 for protecting the head / neck part inflates. Note that the tear seam may be provided only on one of the both end portions 52 and 54.

  As shown in FIG. 11, the chest protection inflating portion 18 expands corresponding to the chest 14B of the occupant 14, and the head / neck protecting inflating portion 20 extends along the front surface of the headrest 28 and the headrest stay. By inflating between the head 14H and the neck 14N and the headrest 28, the forward inertia force of the occupant 14 can be received and absorbed by the chest protection inflating portion 18 and rearward of the head 14H due to rebound. This inertial force can be received and absorbed by the head / neck protecting inflating part 20. In particular, since the head / neck protecting inflatable portion 20 is disposed in advance along the front surface of the headrest 28 or the headrest stay when the chest protecting inflating portion 18 is attached, the head / neck protecting inflating portion 20 is disposed. The inertial force that causes the head 14 </ b> H to move backward can be reliably absorbed by the head / neck protection inflating part 20 regardless of the form of deployment.

  In addition, since most of the periphery of the neck 14N is wrapped by the chest protecting inflatable portion 18 and the head / neck protecting inflating portion 20, the vehicle width direction of the head 14H at the time of a side collision as well as a frontal collision. It is possible to accept and absorb the inertial force.

  In the above-described embodiment, the structure in which the chest protecting inflating portion 18 and the head / neck protecting inflating portion 20 are attached to the occupant restraining webbing 16 has been described. The chest protecting inflating portion 18 and the head / neck protecting inflating portion 20 are configured so that the chest protecting inflating portion 18 and the head / neck protecting inflating portion 20 serve as the occupant restraining webbing 16. It is good also as a structure which has.

  Further, in the above-described embodiment, the vehicle air belt devices 10 and 50 are configured to have both the chest protecting inflating portion 18 and the head / neck protecting inflating portion 20, but in the present invention, the vehicle air belt device is provided. It is good also as a structure which 10 and 50 have only the expansion part 20 for head and neck part protection.

  Furthermore, in the above-described embodiment, the structure for inflating both the chest protecting inflating portion 18 and the head / neck protecting inflating portion 20 with a single inflator has been described, but the two chest protecting inflating portions 18 and It is good also as a structure which expands the expansion part 20 for a head and neck protection with another inflator, respectively. In this case, it is good also as a structure which shifts an expansion | swelling timing or expands only one according to a collision form.

  Further, the head / neck protecting inflatable portion 20 may be arranged in the longitudinal direction of the occupant restraining webbing 16 so that the mounting position thereof can be adjusted.

FIG. 1 to FIG. 9 relate to the first embodiment. FIG. 1 shows that an occupant seated on an occupant seat wears a vehicle air belt device, and the vehicle air belt device operates to operate a chest protection inflatable portion and a head. It is a front view which shows the state which the expansion part for a part and neck protection expanded. It is the side view which shows the state similar to FIG. 1 seen from the vehicle interior side. It is a top view which shows the state similar to FIG. 1 seen from the vehicle compartment upper side. FIG. 3 is a front view showing a normal use state in which an occupant seated on an occupant seat is mounted with a vehicle air belt device. It is the side view which shows the state similar to FIG. 4 seen from the vehicle interior side. It is a top view which shows the state similar to FIG. 4 seen from the vehicle compartment upper side. It is a front view which shows the state which the airbelt apparatus for vehicles act | operated and only the expansion part for chest protection is expand | deployed. It is the side view which shows the state similar to FIG. 7 seen from the vehicle interior side. It is a top view which shows the state similar to FIG. 7 seen from the vehicle compartment upper side. FIGS. 10 and 11 relate to the second embodiment, and FIG. 10 is a front view showing a normal use state in which the occupant seated on the occupant seat is mounted with the vehicle air belt device. It is a front view which shows the state which the airbelt apparatus for vehicles act | operates and the expansion part for a chest protection and the expansion part for a head and neck protection are expand | deployed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle air belt apparatus 12 Crew seat 14 Crew 14 A Back 14 B Chest 14 H Crew head 16 Crew occupant restraint webbing 18 Chest protection expansion part 20 Head and neck protection expansion part 22 Retractor (adjustment means)
28 Headrest 42 Belt Guide 50 Vehicle Air Belt Device 52 Both Ends 54 Both Ends

Claims (6)

An occupant restraining webbing corresponding to the chest of the occupant;
An inflatable portion for protecting the head and neck that is provided on the occupant restraining webbing and inflates along the front surface of the headrest;
A vehicular airbelt device comprising:   The vehicular airbelt device according to claim 1, further comprising a chest protecting inflatable portion provided on the occupant restraining webbing and corresponding to the chest of the occupant when inflated.   The vehicular airbelt device according to claim 2, wherein the head / neck protecting inflatable portion is disposed in advance along a front surface of the headrest or the headrest stay when the chest protecting inflating portion is attached.   4. The head / neck protecting inflating portion according to claim 1, wherein both ends of the inflating portion are provided on the occupant restraining webbing and are used for mounting a rear portion of the occupant. The vehicle air belt device according to claim. The occupant restraining webbing is movably guided by a belt guide provided on the occupant seat,
The vehicular airbelt device according to any one of claims 1 to 4, wherein the head / neck protecting inflating portion is provided closer to a passenger than the belt guide.   The vehicular air belt device according to any one of claims 1 to 5, further comprising adjusting means for adjusting a length of the occupant restraining webbing.

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