JP6036932B2 - Curtain airbag device and occupant protection device - Google Patents

Description

  The present invention relates to a curtain airbag device and an occupant protection device including the curtain airbag device.

  In a curtain airbag, a structure including a wide strap having a substantially triangular shape in a side view that is deployed so as to connect a seam portion between a main chamber and a front chamber and a front pillar is known (for example, Patent Document 1). In this structure, the front chamber is separated from the side window by the wide strap developed.

JP2012-020719A

  By the way, in the structure in which the front chamber is separated from the side window by the wide strap described above, it is difficult to secure the amount of movement of the front chamber to the vehicle interior side, and there is room for improvement from the viewpoint of passenger protection by the front chamber.

  An object of the present invention is to obtain a curtain airbag device and an occupant protection device that can improve occupant protection by a sub-deployment portion that is inflated and deployed in front of a main inflatable portion.

  The curtain airbag device according to the first aspect is expanded by receiving a gas supply when a side collision occurs and when at least one of a minute wrap collision and an oblique collision occurs, and is deployed in a curtain shape along the side window glass. A main deployment part that is provided on the front side in the vehicle front-rear direction with respect to the main deployment part, and a sub-deployment part that is inflated and deployed by receiving a gas supply when at least one of a micro-lap collision and an oblique collision occurs, Connecting the front end side portion of the front pillar in the vehicle front-rear direction and the rear end side portion of the front pillar in the vehicle front-rear direction, so that the intermediate portion in the vehicle front-rear direction passes outside in the vehicle width direction with respect to the sub-deployment portion. A tension structure that is deployed while receiving tension.

  In this curtain airbag device, the occupant is mainly protected by the main deployment portion against a side collision. On the other hand, in the case of a minute lap collision or an oblique collision, the occupant may move forward in the vehicle width while moving forward of the vehicle. Here, the sub-deployment portion that is expanded and deployed in front of the main deployment portion is arranged in the vehicle width direction by a tension structure that is deployed by tension while being inclined along the front pillar in plan view on the outer side in the vehicle width direction. It expands greatly on the inside. That is, in this curtain airbag device, the sub-deployment portion is arranged in the vehicle width direction in comparison with the configuration in which the sub-deployment portion is moved inward in the vehicle width direction by a tether or the like that connects the front end of the main deployment portion and the front end of the front pillar. It can be extended and expanded inward. By the sub-deployment portion that extends and extends greatly inward in the vehicle width direction, it is possible to directly or indirectly protect an occupant moving in front of the vehicle and outward in the vehicle width direction.

  Thus, in the curtain airbag device according to the first aspect, it is possible to improve the occupant protection by the sub-deployment portion that is inflated and deployed in front of the main inflation portion. The sub-deployment unit may receive gas supply from the main deployment unit, or may receive gas supply from a gas flow path or a gas supply unit different from the main deployment unit. In addition, the tension structure may be a structure that receives tension as the main deployment part and the like are deployed, or may be a structure that receives tension as the sub-deployment part is supported from the outside in the vehicle width direction. .

  A curtain airbag device according to a second aspect is the curtain airbag device according to the first aspect, wherein the tension structure includes a front end side portion of the front pillar in the vehicle front-rear direction and a rear end side of the front pillar in the vehicle front-rear direction. It is configured to include a portion that is connected to the portion and a front end portion in the vehicle front-rear direction in the main deployment portion and that is developed in a triangular shape in a side view.

  In this curtain airbag device, the tension structure deployed in a triangular shape as viewed from the side also serves as a tether that connects the main deployed part and the front pillar. For this reason, with a simple structure, it is possible to extend the sub-deployment portion so as to greatly extend inward in the vehicle width direction.

  The curtain airbag device according to a third aspect is the curtain airbag device according to the first or second aspect, wherein the sub-deployment portion includes a plurality of chambers that are deployed adjacent to each other in the vehicle front-rear direction on the outer side in the vehicle width direction. Are connected to each other.

  In this curtain airbag device, in a state where the occupant is protected by the sub-deployment portion, a connecting body that connects a plurality of chambers constituting the sub-deployment portion forms a substantially flat surface and is superimposed on the tension structure. For this reason, the movement and posture change of the sub-deployment portion in the occupant protection state are suppressed, and the occupant can be effectively protected by the sub-deployment portion.

  A curtain airbag device according to a fourth aspect is the curtain airbag device according to any one of the first to third aspects, deployed below a door belt line in a vehicle vertical direction, and the sub-deployment from the main deployment part. And a gas passage through which the gas supplied to the section passes.

  In this curtain airbag device, the sub-deployment portion is inflated and deployed by supplying gas from the main deployment portion through the gas passage. Since the gas passage is inflated and deployed below the door belt line, it is possible to prevent or effectively suppress the occupant from coming into contact with the door trim at the sub-deployment portion and the gas passage.

  The occupant protection device according to the fifth aspect provides a front-impact airbag by gas supply when a frontal collision occurs and when a collision of a form in which the main deploying portion is deployed occurs among a minute lap collision and an oblique collision. A front-seat airbag device that inflates and deploys the vehicle, and the first and fourth sub-deployment portions that are inflated and deployed on the front side in the vehicle front-rear direction with respect to the front-impact airbag in a side view. A curtain airbag device according to any one of the aspects.

  In this occupant protection device, an occupant that moves forward in the vehicle width direction while moving in the front of the vehicle in the event of a minute lap collision or oblique collision is caused by at least one of the front impact airbag and the main deployment portion of the curtain airbag device. Protected. Here, the sub deployment portion of the curtain airbag device is deployed in front of the front impact airbag. For this reason, even if an occupant slips between the front airbag and the main deployment part, the occupant is prevented or effectively prevented from coming into contact with the vehicle body structure (instrument panel, pillar, etc.). To be suppressed.

  As described above, the curtain airbag device and the occupant protection device according to the present invention have an excellent effect that the occupant protection by the sub-deployment portion that is inflated and deployed in front of the main inflatable portion can be improved.

It is a top view showing typically the operation state of the crew member protection device concerning a 1st embodiment of the present invention. It is the side view seen from the vehicle outside which shows the operation state of the crew member protection device concerning a 1st embodiment of the present invention typically. It is a side view of the non-inflation deployment (before folding) state which shows the front part of the curtain airbag which constitutes the crew member protection device concerning a 1st embodiment of the present invention. It is a figure which shows the modification of the curtain airbag which comprises the passenger | crew protection apparatus which concerns on the 2nd Embodiment of this invention, Comprising: (A) is the side surface seen from the vehicle outer side which shows typically the operating state of a passenger | crew protection apparatus. FIG. 4B is a plan view schematically showing the operating state of the occupant protection device.

In the present specification, “first embodiment” is read as “reference example”, and “second embodiment” is read as “first embodiment”.
An occupant protection device 10 according to a first embodiment of the present invention will be described with reference to FIGS. In addition, arrow FR, arrow UP, and arrow OUT that are appropriately described in each figure respectively indicate the front direction, the upward direction, and the vehicle width direction outside of the automobile A to which the occupant protection device 10 is applied. Hereinafter, when the description is made simply using the front-rear direction and the up-down direction, the front-rear direction of the vehicle and the up-down direction of the vehicle are indicated unless otherwise specified.

  FIG. 1 is a plan view showing a part of a passenger compartment of an automobile A to which an occupant protection device 10 is applied. FIG. 2 is a side view of a part of the automobile A viewed from the outside of the vehicle. Is shown. As shown in these drawings, the occupant protection device 10 includes a driver airbag device 12 as a front seat airbag device and a curtain airbag device 14.

(Configuration of driver airbag device)
The driver seat airbag device 12 includes a front impact airbag 18 that is deployed behind the steering wheel 16. The front airbag 18 is housed in the steering wheel 16 together with an inflator (not shown) in a folded state. The front airbag 18 is inflated and deployed between the steering wheel 16 and the driver's seat occupant P by receiving gas supply from the inflator when the inflator is operated.

  As will be described later, the inflator of the driver's seat airbag device 12 is actuated at the time of a frontal collision of the automobile A, a minute lap collision, and an oblique collision. In addition, the collision forms of the minute lap collision and the oblique collision will be described later.

(Configuration of curtain airbag device)
As shown in FIG. 2, the curtain airbag device 14 includes a curtain airbag 20 and an inflator 22 as a gas supply device. The curtain airbag 20 is formed so as to be deployed in a curtain shape along a side window glass 24 (see FIG. 1) as a vehicle interior side portion. In this embodiment, the curtain airbag 20 is configured to cover the front and rear side window glasses 24 and the center pillar 25 located on the sides of the front seat and the rear seat. 1 and 2 mainly illustrate the front portion of the curtain airbag 20.

  Although not shown, the curtain airbag 20 is, for example, a roll folded or bellows folded into a long shape, and a portion extending from the front pillar (A pillar) 26 to the vicinity of the rear pillar over the roof side portion 28. Is housed in. The roof side portion 28 in this embodiment forms the upper edge of the front and rear door opening as an opening for getting on and off surrounded by the roof side portion 28, the front pillar 26, and the center pillar 25 and a rear pillar and a rocker (not shown). doing. Further, supplementing the front pillar 26, as shown by an imaginary line in FIG. 1, the front pillar 26 is inclined and extended in a plan view so that the rear side is located on the inner side in the vehicle width direction from the front side. . In other words, the front pillar 26 extends in an inclined manner so that the upper side is positioned on the inner side in the vehicle width direction than the lower side.

  More specifically, the curtain airbag 20 is accommodated between a roof side rail that forms the roof side portion 28 and a roof head lining, and between the front pillar 26 and the pillar garnish. A part of the curtain airbag 20 on the front end side may be folded or folded inward in the vehicle width direction and accommodated in the roof front end portion or the roof side portion 28.

  The curtain airbag 20 receives the gas supply from the inflator 22 when the inflator 22 is operated, and deploys along the front and rear side window glasses 24 and the center pillar 25 so that the occupant of the front seat and the rear seat The head is protected. Specifically, the inflator 22 employs a combustion type or a cold gas type, and supplies the gas generated by being operated into the curtain airbag 20. The gas outlet of the inflator 22 communicates with the interior of the curtain airbag 20. In this embodiment, the inflator 22 is disposed on the roof side portion 28. The shape of the curtain airbag 20 will be described later.

  The curtain airbag device 14 described above is provided on each of the roof side portions 28 and the like on both sides of the vehicle A in the vehicle width direction. Although illustration and detailed explanation are omitted, the curtain airbag device 14 on the passenger seat side is line-symmetrical (left-right symmetric) with the curtain airbag device 14 on the driver seat side with respect to the center (center line) in the vehicle width direction of the automobile A. It is configured. The curtain airbag device 14 on the passenger seat side constitutes an occupant protection device with a passenger seat airbag device as a front seat airbag device.

(Configuration of curtain airbag front)
The front portion of the curtain airbag 20 includes a main deployment portion 20M that mainly protects the head H of the driver occupant P against side collision and rollover, and a sub-deployment portion that is inflated and deployed in front of the main deployment portion 20M. 20S. The front portion of the curtain airbag 20 includes a triangular cross tether 30 as a tension structure that connects the front end portion of the main deployment portion 20M and the front pillar 26. This will be specifically described below.

[Configuration of sub-expansion section]
FIG. 3 is a side view showing a deployed shape of the front portion of the curtain airbag 20 in a non-constrained and non-inflated state with respect to the vehicle body. As shown in this figure, the sub-deployment portion 20S is a bag body (chamber) independent of the main deployment portion 20M, and the gas passage 20F whose rear lower end portion is a communication portion with the front lower end portion of the main deployment portion 20M. It is said that.

  The sub-deployment part 20S receives gas supply from the main development part 20M through the gas passage 20F, and is expanded and deployed in a vertically long cylindrical shape (substantially cylindrical shape). In this deployed state (the occupant P is not restrained), the sub-deployment portion 20S is configured not to contact the rear surface of the instrument panel 32.

  Further, in this embodiment, the sub-deployment portion 20S is configured to be inflated and deployed such that the lower end thereof protrudes downward from the door belt line BL (see FIG. 2). That is, in this embodiment, the gas passage 20F is configured to expand and deploy below the door belt line BL. As a result, during the so-called rollover of the automobile A, the occupant's release from the vehicle is prevented or effectively suppressed. Note that the lower part of the sub-deployment part 20S (the part developed below the door belt line BL) may be regarded as a part of the gas passage 20F.

  A long seam S is formed above and below the gas passage 20F in the curtain airbag 20 so as to partition the main deploying portion 20M and the sub deploying portion 20S. The seam S reaches the upper end of the curtain airbag 20. Instead of the seam S, a configuration in which slits along the vertical direction are formed may be employed.

[Composition of triangle cross tether]
The triangular cross tether 30 is formed of a cloth (cloth) material that is developed in a right triangle shape in which the lower edge 30L and the rear edge 30R form a substantially right angle in a side view. The triangular cross tether 30 has a portion near the rear edge 30R connected to the seam S that forms the front end of the main deployment portion 20M by sewing or the like over substantially the entire length of the seam S. In this embodiment, the rear portion of the upper edge 30U that forms the oblique side portion of the triangular cross tether 30 in this state protrudes above the upper end of the sub-deployment portion 20S.

  The vehicle body connection portion 30CR connected to the upper end of the front pillar 26 (near the boundary with the roof side portion 28) is connected to the rear end (the corner portion of the upper edge 30U and the rear edge 30R) of the upper edge 30U in the triangular cross tether 30. Is formed. The vehicle body connection portion 30CR may be provided above the seam S in the curtain airbag 20. That is, the triangular cross tether 30 may be configured to be connected to the upper end of the front pillar 26 via the curtain airbag 20.

  On the other hand, a vehicle body connection portion 30CF connected to the lower end of the front pillar 26 (upper side of the door belt line BL) is formed at the front end 30F (the corner portion of the upper edge 30U and the lower edge 30L) of the triangular cross tether 30. . Thereby, the triangular cross tether 30 connects the upper and lower (front and rear) ends of the front pillar 26 along the upper edge 30U. The triangular cross tether 30 is folded together with the curtain airbag 20 and accommodated mainly between the front pillar 26 and the pillar garnish.

  The triangular cross tether 30 is deployed on the outer side in the vehicle width direction with respect to the sub-deployment portion 20 </ b> S while receiving tension from the curtain airbag 20 as the curtain airbag 20 is inflated and deployed. As a result, when the curtain airbag 20 is deployed, the sub-deployment portion 20S is supported by the triangular cross tether 30 from the outside in the vehicle width direction and deployed while being bent from the rear end side as a base point so that the front end side is directed inward in the vehicle width direction. It is configured.

  In the curtain airbag 20, the straight line connecting the front vehicle body connection portion 30CF in the triangular cross tether 30 and the connection point connected to the rear pillar on the rear end (not shown) represents the tension line in the deployed state (when occupant is restrained). It comes to form. Therefore, the triangular cross tether 30 in this embodiment has a function of connecting the main deployment part 20M of the curtain airbag 20 to the front end of the front pillar 26 and a function of bending the sub-deployment part 20S in the vehicle width direction in a plan view as described above. It is configured to fulfill.

[Composition summary of curtain airbag]
In the curtain airbag device 14 described above, the sub-deployment portion 20S is inflated and deployed so as to cover the front pillar 26 and the outer end portion in the vehicle width direction of the instrument panel 32 when viewed from the driver's seat occupant P. It has become. As shown in FIGS. 1 and 2, the sub-deployment portion 20S is inflated and deployed on the front side with respect to the front-impact airbag 18 (steering wheel 16) in a plan view and a side view.

[Configuration of ECU]
The occupant protection device 10 includes an occupant protection ECU 34 as a control device. The occupant protection ECU 34 is electrically connected to a plurality of collision sensors (not shown). The occupant protection ECU 34 can detect a frontal collision, a side collision, a rollover, a minute lap collision, and a diagonal collision (occurrence or unavoidable) with respect to the applied vehicle A based on information from each collision sensor. Has been.

  Here, the micro 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 A, 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 is defined as, for example, an oblique front defined by NHTSA (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). In this embodiment, an oblique collision at a relative speed of 90 km / hr is assumed as an example.

  The occupant protection ECU 34 operates the inflator of the driver airbag device 12 when a frontal collision is detected. The occupant protection ECU 34 operates the inflator 22 of the curtain airbag device 14 when a side collision or rollover is detected. Further, the occupant protection ECU 34 operates the inflator of the driver airbag device 12 and the inflator 22 of the curtain airbag device 14 when detecting a minute lap collision and an oblique collision, respectively.

(Function)
Next, the operation of the first embodiment will be described.

  First, the operation of the occupant protection device 10 when the occupant protection ECU 34 detects a minute lap collision will be described.

  The occupant protection ECU 34 operates the inflator of the driver's seat airbag device 12 and the inflator 22 of the curtain airbag device 14 when detecting that a minute lap collision has occurred based on a signal from each collision sensor. Then, the front airbag 18 is inflated and deployed in front of the driver's seat occupant P and above and behind the steering wheel 16 in response to gas supply from the inflator.

  The curtain airbag 20 is supplied with gas from the inflator 22, and the main deploying portion 20 </ b> M is deployed in a curtain shape along the side window glass 24. Further, the sub-deployment portion 20S that has received the gas supply from the inflator 22 through the main deployment portion 20M and the gas passage 20F is expanded and deployed.

  By the way, at the time of the minute lap collision, the driver's seat occupant P moves forward with respect to the vehicle body, and further moves outward in the vehicle width direction (see an arrow L1 indicated by an imaginary line in FIG. 1). For this reason, the head H of the driver's seat occupant P may enter between the front airbag 18 and the main deployment portion 20M of the curtain airbag 20.

  Here, in this occupant protection device 10, since the triangular cross tether 30 is deployed on the outer side in the vehicle width direction of the sub-deployment portion 20S, the sub-deployment portion 20S is bent inward in the vehicle width direction and protrudes inward in the vehicle width direction. Be expanded. Since the rear end of the triangular cross tether 30 is connected to the upper end (rear end) of the front pillar 26 at the vehicle body connection portion 30CR, the sub-expansion portion 20S is greatly extended and deployed in the vehicle width direction.

  This point is supplemented by comparison with a comparative example. For example, in the comparative example in which the sub-deployment portion 20M is moved inward in the vehicle width direction using the tether T (see the dashed line in FIG. 1) that simply connects the front end of the main deployment portion 20M and the lower end of the front pillar 26, The amount of movement of the portion 20M inward in the vehicle width direction is small. In contrast, in the present embodiment, as shown in FIG. 1, the triangular cross tether 30 (of the triangular cross tether 30 ( The top) is expanded. For this reason, the triangular cross tether 30 is developed such that the rear end side thereof is located on the inner side in the vehicle width direction than the tether T according to the comparative example. Therefore, the sub-deployment portion 20S in the present embodiment is projected so as to extend larger inward in the vehicle width direction than the sub-deployment portion 20S in the comparative example.

  As a result, even if the head H of the driver's seat occupant P passes through between the front impact airbag 18 and the main deployment part 20M, the head H contacts the front pillar 26, the instrument panel 32, and the like. Is prevented or effectively suppressed by the sub-deployment portion 20S. At this time, since the reaction force is supported by the gas passage 20F positioned below the door belt line BL, the sub-deployment portion 20S is compared with a configuration having no portion positioned below the door belt line BL. The occupant restraint is high. In addition, the outer end portion in the vehicle width direction of the front impact airbag 18 that restricts the forward movement of the head H interferes with the sub-deployment portion 20S, so that the head H and the front impact airbag 18 are mainly deployed. An effect of effectively suppressing the slipping through the portion 20M itself can also be expected.

  Next, the operation of the occupant protection device 10 when the occupant protection ECU 34 detects an oblique collision will be described.

  The occupant protection ECU 34 activates the inflator of the driver airbag device 12 and the inflator 22 of the curtain airbag device 14 when detecting that an oblique collision has occurred based on signals from the respective collision sensors. In an oblique collision, the driver's seat occupant P moves linearly forward and outward in the vehicle width direction (see an arrow L2 indicated by an imaginary line in FIG. 1). Even in this case, as described above, the sub-deployment portion 20S is greatly moved inward in the vehicle width direction, so that the head portion H comes into contact with the front pillar 26, the instrument panel 32, and the like by the sub-deployment portion 20S. Prevented or effectively suppressed. At this time, since the reaction force is supported by the gas passage 20F positioned below the door belt line BL, the sub-deployment portion 20S is compared with a configuration having no portion positioned below the door belt line BL. The occupant restraint is high. Further, the outer end portion in the vehicle width direction of the front collision airbag 18 that restricts the forward movement of the head H interferes with the sub-deployment portion 20S, so that the head H and the front collision airbag 18 are mainly deployed. An effect of effectively suppressing the slipping through the portion 20M itself can also be expected.

  In the curtain airbag device 14, the triangular cross tether 30 that projects the sub-deployment portion 20 </ b> S greatly inward in the vehicle width also functions as a tether that connects the main deployment portion 20 </ b> M of the curtain airbag 20 to the front end of the front pillar 26. ing. For this reason, compared with the structure which isolate | separates and fulfill | performs these functions by a separate structure, the sub expansion | deployment part 20S can be greatly extended and expanded by the vehicle width direction with a simple structure.

(Second Embodiment)
Next, an occupant protection device 50 according to a second embodiment will be described with reference to FIGS. 4 (A) and 4 (B). As shown in these drawings, the occupant protection device 50 includes a driver's seat airbag device 12 and a curtain airbag device 40. And the curtain airbag 20 which comprises the curtain airbag apparatus 40 differs from 1st Embodiment by the point by which the subdeployment part 20S has several chamber 20SC1, 20SC2.

  The chambers 20SC1 and 20SC2 constituting the sub-deployment unit 20S are configured as independent bags that are partitioned by a seam S2 that extends vertically and are adjacent to each other in the front-rear direction. The chambers 20SC1 and 20SC2 are each supplied with gas from the main developing portion 20M through the gas passage 20F.

  And the subdeployment part 20S has the connection tether 42 as a connection body which connects the front and rear chambers 20SC1, 20SC2. As shown in FIG. 4 (B), the connection tether 42 connects the portions facing outward in the vehicle width direction in the deployed state in the chambers 20SC1 and 20SC2, and has a substantially outward surface in the vehicle width direction in the sub-deployment portion 20S. It is set as the structure made into a flat surface. In this embodiment, the length of the connection tether 42 is determined so that the sub chamber 20S is deployed in a state where the seam S2 serves as a folded portion and the chamber SC1 overlaps the front side of the chamber 20SC2. Other configurations of the curtain airbag device 40 and the occupant protection device 50 are configured in the same manner as the corresponding configurations of the curtain airbag device 14 and the occupant protection device 10 according to the first embodiment, including portions not shown. .

  Accordingly, the curtain airbag device 40 constituting the occupant protection device 50 according to the second embodiment is basically the same as the curtain airbag device 14 and the occupant protection device 10 according to the first embodiment. Can be obtained.

  Further, in the curtain airbag device 40, the sub-deployment portion 20S is configured by connecting two chambers 20SC1 and 20SC2 adjacent in the front-rear direction by a connection tether 42. When the head H of the occupant P comes into contact with the sub-deployment portion 20S, the flat connection tether 42 is superimposed on the triangular cross tether 30 and the load (reaction force) is supported. For this reason, the sub-expansion part 20S in this embodiment is compared with the sub-expansion part 20S which consists of a single chamber expand | deployed in the cylindrical shape extended up and down from the head H by a movement or a posture change (rolling etc.). Escape is suppressed. Thereby, even if compared with 1st Embodiment, a passenger | crew can be protected more effectively by subdeployment part 20S.

  In the second embodiment, an example in which the sub-deployment unit 20S includes the two chambers 20SC1 and 20SC2 has been described, but the present invention is not limited to this. For example, at least a part of three or more chambers may be connected by the connecting tether 42 or the like to constitute the sub-deployment portion 20S. Further, the present invention is not limited to the configuration in which the connecting body that connects the plurality of chambers is the cloth-like connecting tether 42. For example, it is good also as a structure which connects a some chamber with connection bodies, such as a string shape and a strap shape, for example.

  Further, in each of the above-described embodiments, an example in which the triangular cross tether 30 receives tension due to the deployment of the main deployment portion 20M is shown, but the present invention is not limited to this. For example, the triangular cross tether 30 may receive a tension as it supports the sub-deployment portion 20S from the outside in the vehicle width direction.

  Further, in each of the above-described embodiments, an example in which the triangular cross tether 30 has both a function of connecting the main deployment portion 20M and the front pillar 26 and a function of projecting the sub-deployment portion 20S inwardly in the vehicle width direction is shown. However, the present invention is not limited to this. For example, in addition to the tether for connecting the main deploying portion 20M and the front pillar 26, a single or unfolded along the front pillar 26 in a plan view and projecting the sub-deploying portion 20S greatly inward in the vehicle width direction. It is good also as a structure which provided the some tension | tensile_strength structure. In this case, the tension structure is not limited to a cross (cloth) shape, and may be, for example, a string shape or a strap shape.

  Furthermore, in each of the above-described embodiments, an example in which the curtain airbag device 14 forms the occupant protection device 10 together with the driver's seat airbag device 12 has been described, but the present invention is not limited to this. For example, an occupant protection device may be configured by a safety device and a curtain airbag device 14 having a form different from that of the driver's seat airbag device 12, and for example, the occupant is protected against a minute wrap collision or an oblique collision by the curtain airbag device 14 alone. It is good also as a structure which protects.

  Further, in each of the above-described embodiments, the example in which the sub-deployment unit 20S is expanded and deployed by the gas supply from the main deployment unit 20M is shown, but the present invention is not limited to this. For example, the gas may be supplied to the sub-deployment portion 20S via a gas flow path formed along the upper edge of the curtain airbag, an inner tube provided in the curtain airbag, or the like. Further, for example, the gas may be supplied to the sub-deployment unit 20S by an inflator different from the inflator 22 that supplies the gas to the main deployment unit 20M. In this configuration, it is possible to expand and deploy the sub-deployment portion 20S only in the case of a minute lap collision and an oblique collision.

  Furthermore, in each of the above-described embodiments, the example in which the driver's seat airbag device 12 and the curtain airbag device 14 are operated in the case of a minute lap collision and an oblique collision has been described, but the present invention is not limited to this. For example, the driver's seat airbag device 12 and the curtain airbag device 14 may be configured to operate when either one of a minute wrap collision and an oblique collision. In this configuration, when the other of the micro lap collision and the diagonal collision occurs, the occupant is protected by another safety device.

  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 protection device 12 Driver's seat airbag device 14 Curtain airbag device 18 Front impact airbag 20 Curtain airbag 20M Main deployment part 20S Sub deployment unit 20F Gas passage 20SC1, 20SC2 Multiple chambers 24 Side window glass 26 Front pillar 30 Triangular cross tether (tensile structure)
40 Curtain airbag device 42 Connecting tether
50 Crew protection device BL Door belt line S2 Seam

Claims (5)

When a side collision occurs, and when at least one of a micro lap collision and an oblique collision occurs, the main deployment part expands in response to gas supply and is deployed in a curtain shape along the side window glass;
A plurality of chambers that are deployed adjacent to each other in the vehicle front-rear direction are configured to be connected to each other by a connecting body on the outer side in the vehicle width direction, and are provided on the front side in the vehicle front-rear direction with respect to the main deployment part. A sub-expansion part that expands and expands upon receiving a gas supply when at least one of them occurs
Connecting the front end side portion of the front pillar in the vehicle front-rear direction and the rear end side portion of the front pillar in the vehicle front-rear direction, so that the intermediate portion in the vehicle front-rear direction passes outside in the vehicle width direction with respect to the sub-deployment portion. A tension structure that is deployed while receiving tension;
Equipped with a,
The connecting body is configured as a connecting tether that connects portions facing outward in the vehicle width direction in the deployed state in the plurality of chambers, and has a surface that faces outward in the vehicle width direction in the sub-deployment portion as a substantially flat surface. And
The sub-deployment unit is a curtain airbag device configured to support a load that is input to the sub-deployment unit when the connection tether is superimposed on the tension structure .   The tension structure is connected to a front end side portion of the front pillar in the vehicle front-rear direction, a rear end side portion of the front pillar in the vehicle front-rear direction, and a front end side portion of the main deployment portion in the vehicle front-rear direction. The curtain airbag device according to claim 1, wherein the curtain airbag device is configured to include a portion deployed in a triangular shape in a side view. The plurality of chambers are configured as independent bags that are partitioned by seams extending vertically and are adjacent to each other in the front-rear direction.
The connection tether has a length in the vehicle front-rear direction so that the seam serves as a folded portion and the sub-deployment portion is deployed in a state where the chamber overlaps the front side of the rear chamber among the plurality of chambers. The curtain airbag device according to claim 1 or 2, wherein the curtain airbag device is fixed . The plurality of chambers are configured as independent bags that are partitioned by seams extending vertically and are adjacent to each other in the front-rear direction. The plurality of chambers are deployed below the door belt line and pass through gas passages positioned below the seams. The curtain airbag device according to any one of claims 1 to 3, wherein gas is supplied from a main deployment portion . Front seat air that inflates and deploys a front impact air bag by gas supply when a frontal collision occurs and when a collision of a form in which the main deploying part is deployed among a micro-lap collision and an oblique collision occurs A bag device;
The curtain airbag device according to any one of claims 1 to 4, wherein the sub-deployment portion is configured to be inflated and deployed on a front side in a vehicle front-rear direction with respect to the front-impact airbag in a side view. When,
An occupant protection device.

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