Head protection airbag device

Abstract

To provide a head protection airbag device capable of protecting the head of an occupant with a simple configuration.SOLUTION: Provided is a head protection airbag device M capable of protecting the head MH of an occupant MD seated on a seat 3 of a vehicle. An end edge 7a side of a roof 7 in a vehicle being a side of the occupant is provided with: an airbag 25 arranged in a folded state and configured to be deployed downward to cover the side of the head of the occupant when an external force is applied from the side of the vehicle; and guide means GM that guides the airbag for deploying downward from a stored position to a deployed position. The airbag includes: an indoor side wall part 27 arranged in the indoor side when inflation is completed; an outdoor side wall part 28 arranged in the outdoor side; and a connection wall part 29 that connects end edges of the indoor side wall part and the outdoor side wall part. In a region of the connection wall part, an air intake hole 35 into which atmospheric air can flow when the airbag is deployed downward is installed.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a head-protecting airbag device capable of protecting the head of an occupant seated in a vehicle seat. [Background technology]

[0002] Normally, a head protection airbag device for protecting the head of an occupant seated in a vehicle seat has a structure in which an airbag is inflated using an inflator. Recently, there are also vehicles for one person that do not have doors and have left and right sides open to the occupant (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP2014-83858A Summary of the Invention [Problem to be solved by the invention]

[0004] In vehicles that do not have doors, it is preferable that the device installed to protect the occupants be of a simple configuration, and there has been a demand for a device that can protect the occupants with a simple configuration without using an inflator.

[0005] The present invention is devised to solve the above-mentioned problems, and has an object to provide a head-protecting airbag device capable of protecting the head of an occupant with a simple configuration. [Means for solving the problem]

[0006] The head-protecting airbag device according to the present invention is a head-protecting airbag device capable of protecting the head of an occupant seated in a vehicle seat, comprising: an airbag that is folded and disposed on the side of an occupant at an edge side of a roof of a vehicle and that is configured to deploy downward to cover the side of the occupant's head when an external force is applied from the side of the vehicle; A guide means for guiding the airbag downward from a storage position to a deployment position; The present invention is configured to include: The airbag has an interior wall portion that is positioned on the interior side of the vehicle when inflation is complete, an exterior wall portion that is positioned on the exterior side of the vehicle, and a connecting wall portion that connects the edges of the interior wall portion and the exterior wall portion, and is characterized in that an air intake hole is provided in the area of ​​the connecting wall portion to allow air to flow into the interior when the airbag is deployed downward.

[0007] In the head-protecting airbag device of the present invention, the airbag is configured to inflate by allowing air to flow into the airbag through the air intake hole when the airbag is deployed downward. That is, the head-protecting airbag device of the present invention does not require a gas supply member such as an inflator for supplying inflation gas to the airbag, and can have a simple configuration. Since the air intake hole is formed in the airbag in an area of ​​a connecting wall portion that connects the edges of the vehicle-interior wall portion and the vehicle-exterior wall portion, the airbag is stably opened when the airbag is deployed downward, allowing air to smoothly flow into the airbag. Furthermore, in the head-protecting airbag device of the present invention, the airbag is configured to be guided in its downward deployment by a guide means, so that even if the airbag is configured to inflate by allowing air to flow into the airbag, the airbag can be rapidly deployed downward to cover the sides of the occupant's head.

[0008] Therefore, the head-protecting airbag device of the present invention can protect the head of the occupant with a simple configuration.

[0009] In the head protection airbag device of the present invention, the guide means is A guide pole on the vehicle body side that is disposed substantially along the vertical direction behind the airbag when the airbag is fully deployed; a connecting ring portion that is disposed on the airbag side and allows the guide pole to slide when the airbag is deployed; A drive source that deploys the airbag downward; The configuration includes: It is preferable that the airbag is configured to utilize gravity as a driving source and to deploy downwards by free fall while being guided by a guide pole.

[0010] With a head protection airbag device configured as described above, the airbag is deployed downward by free fall using its own weight, eliminating the need for a drive means for deploying the airbag downward, making it possible to further simplify the configuration.

[0011] Furthermore, in the head protection airbag device configured as described above, if the intake hole is configured to include a hole body formed by opening the connecting wall portion and a check valve mechanism capable of closing the hole body, the atmospheric air (air) that has flowed into the airbag can be prevented from flowing out to the outside, thereby allowing the airbag to maintain a high internal pressure and enabling the inflated airbag to adequately protect the occupant's head.

[0012] Specifically, if the airbag is configured so that its fully inflated shape when viewed from the inside and outside is a roughly triangular plate with its lower edge roughly aligned in the front-to-rear direction, and the air intake hole is disposed on the underside of the airbag when fully inflated, a large amount of air can flow in through the air intake hole when the airbag deploys downward, enabling the airbag to inflate quickly, which is preferable.

[0013] In addition, the airbag may be configured so that its fully inflated shape when viewed from the inside or outside is a roughly triangular plate with the trailing edge roughly aligned in the up-down direction, and the air intake hole may be located on the rear side of the airbag when fully inflated. With such a configuration, rapid inflation is suppressed compared to when the air intake hole is located on the underside, but air resistance around the edges of the air intake hole is reduced, so that the airbag can be deployed downwards stably with less flapping. [Brief description of the drawings]

[0014] [Figure 1] 1 is a schematic side view of a vehicle on which a head protection airbag device according to an embodiment of the present invention is mounted. [Diagram 2] 1 is a schematic front view of a vehicle on which a head protection airbag device according to an embodiment of the present invention is mounted. [Diagram 3] 10 is a partially enlarged schematic vertical cross-sectional view showing a locking member disposed on the upper end side of the guide pole. FIG. [Figure 4] 11 is a partially enlarged schematic side view showing a stopper disposed on the lower end side of the guide pole. FIG. [Diagram 5] 1 is a schematic side view of an airbag used in a head protection airbag device according to an embodiment in a state in which the airbag is inflated by itself; [Figure 6] FIG. 6 is a schematic bottom view of the airbag of FIG. 5. [Figure 7] FIG. 7 is an end view of portion VII-VII of FIG. 5. [Figure 8] FIG. 7 is a schematic cross-sectional view taken along the line VIII-VIII in FIG. 6. [Figure 9] 5 is a schematic cross-sectional view showing an open and closed state of an intake hole. FIG. [Figure 10] 1 is a schematic side view of a vehicle showing a state in which an airbag has completed inflation in a head protection airbag device according to an embodiment. [Figure 11] 1 is a schematic front view of a vehicle showing a state in which an airbag has completed inflation in a head protection airbag device according to an embodiment. [Figure 12] FIG. 11 is a schematic perspective view of an airbag according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A head protection airbag device M of the embodiment is mounted on a one-person vehicle V as shown in Figures 1 and 2. As shown in Figure 1, the vehicle V does not have a door, and when a driver MD as an occupant is seated in a seat 3, the left and right sides of the driver MD are open.

[0016] The head protection airbag device M is disposed to the side of the driver MD as an occupant seated in the seat 3, and in this embodiment, is disposed to the right of the driver MD (see FIG. 2). The head protection airbag device M includes an airbag 25 that is folded and disposed on the right edge 7a side of the roof 7 of the vehicle V, and guide means GM that guides the downward deployment of the airbag 25. The guide means GM includes a guide pole 10 that is disposed on the vehicle body 1 side of the vehicle V, a connecting ring portion 46 that is disposed on the airbag 25 side, and a retaining means (locking means 12) that retains the position of the connecting ring portion 46 of the airbag 25 that is folded and disposed in the stored position relative to the guide pole 10.

[0017] The guide pole 10 constituting the guide means GM is disposed on the vehicle body 1 side behind the airbag 25 when the airbag 25 is fully inflated, so as to be substantially aligned in the vertical direction, and is disposed on the right rear side of the backrest 4 of the seat 3 of the vehicle V, so as to be substantially aligned in the vertical direction (see Figs. 1, 2, 10, and 11). Specifically, although detailed illustration is omitted, the guide pole 10 is disposed so that its upper end 10a is connected to the right edge 7a of the roof 7, and its lower end is connected to the vehicle body 1 at a position that is the right rear side of the seat part 5 of the seat 3. The guide pole 10 has a cylindrical outer shape, and in the case of the embodiment, is made of a metal pipe made of aluminum, aluminum alloy, or the like. The guide pole 10 guides the downward deployment of the airbag 25 from the stored position to the deployed position by sliding a connecting ring part 46 disposed on the airbag 25 side.

[0018] As a retaining means for retaining the position of the connecting ring portion 46 of the airbag 25 folded and disposed at the storage position relative to the guide pole 10, a locking member 12 for locking the connecting ring portion 46 of the airbag 25 folded and disposed at the storage position is disposed on the upper end 10a side of the guide pole 10 as shown in A and B of FIG. 3. This locking member 12 is configured to be able to maintain the holding state of the connecting ring portion 46 and to be able to release the holding state of the connecting ring portion 46 when actuated. In the case of the embodiment, an electromagnetic solenoid is used as the locking member 12. Specifically, as shown in A of FIG. 3, the locking member 12 includes a fixed iron core portion 13 and a movable iron core portion 14 disposed inside the upper end 10a side of the guide pole 10, and a coil 15 disposed on the outer circumferential side of the movable iron core portion 14 and the fixed iron core portion 13. The movable iron core part 14 is disposed below the fixed iron core part 13 with its lower surface supported by the support part 10d extending from the inner peripheral surface of the guide pole 10. A locking groove 14a into which the connecting ring part 46 can be inserted and locked is formed on the outer peripheral side of the lower end of the movable iron core part 14 so as to be recessed over the entire circumference. This locking groove 14a is formed in the movable iron core part 14 in a non-energized state (a state in which the lower surface side is supported by the support part 10d) at a position corresponding to the insertion hole part 10c formed by cutting out at least the rear surface side of the guide pole 10, and the connecting ring part 46 can be locked (the connecting ring part 46 can be held) by inserting a part of the inner peripheral edge 46a side of the connecting ring part 46 into the inside through the insertion hole part 10c. The coil 15 is disposed in the movable iron core part 14 in a non-energized state (a state in which the lower surface side is supported by the support part 10d), from the outer periphery of the region above the locking groove 14a to the outer periphery of the upper fixed iron core part 13. The fixed iron core part 13 is disposed above the movable iron core part 14 and spaced apart from the movable iron core part 14 so as to ensure the movement stroke of the movable iron core part 14. In the locking member 12 of the embodiment, when the coil 15 is energized, the movable iron core part 14 is moved upward toward the fixed iron core part 13 side (see B in FIG. 3), and as the movable iron core part 14 moves upward, the connecting ring part 46 is released from the locked state with the locking groove 14a.When the engagement with the locking groove 14a is released, the connecting ring portion 46 is caused to slide down the guide pole 10 by gravity. When the power supply to the coil 15 is stopped after the engagement between the connecting ring portion 46 and the locking groove 14a is released, the movable iron core portion 14 falls and the lower surface side is supported by the support portion 10d. The locking member 12 is electrically connected to an operating circuit (not shown) provided on the vehicle body 1 side of the vehicle V.

[0019] A stopper 18 is formed on the lower end 10b side of the guide pole 10 to lock the connecting ring portion 46 after the airbag 25 has been fully deployed (after the downward movement has been completed) and restrict the airbag 25 from returning upward. As shown in Fig. 4, the stopper 18 is formed so as to protrude outward from the outer circumferential surface of the guide pole 10, and in this embodiment, the diameter of the stopper 18 is enlarged toward the lower end side. The outer diameter dimension of the lower end side of the stopper 18 is set to a dimension that can be inserted into the falling connecting ring portion 46 and can be locked to the inner peripheral edge side of the connecting ring portion 46 after the falling has been completed to restrict the upward movement of the connecting ring portion 46.

[0020] As shown in Figures 5 to 8, the airbag 25 comprises a bag body 26 that inflates by allowing air to flow into it, a connecting tab 42 that connects the upper edge side of the bag body 26 to the right edge 7a side of the roof 7, a connecting belt portion 45 that extends rearward from the lower rear end side of the bag body when deployment is complete, and a connecting ring portion 46 that is arranged on the tip 45a side of the connecting belt portion 45 and inserted into the guide pole 10.

[0021] The bag body 26 is configured to inflate so as to cover the sides of the head MH of the driver MD seated on the seat 3, and when fully inflated, as viewed from the inside / outside direction (left / right direction), it is shaped like a substantially right-angled triangular plate with the oblique side located at the front upper side. Specifically, when fully inflated, the bag body 26 is arranged so that the front upper edge 26a side is substantially aligned with the roof 7 (the right edge 7a of the roof 7) which is curved and slightly inclined downward toward the front, as viewed from the inside / outside direction, and more specifically, the bag body 26 is arranged so that the lower edge 26b side is substantially aligned with the front-rear direction and the rear edge 26c side is substantially aligned with the up-down direction (see FIG. 10). More specifically, when fully inflated, the lower edge 26b of the bag body 26 is arranged so that it is slightly inclined upward toward the front with respect to the front-rear direction, and the rear edge 26c is arranged so that it is inclined downward toward the front with respect to the vertical direction. The bag body 26 is configured to include an interior wall portion 27 arranged on the interior side of the vehicle when the bag is fully inflated, an exterior wall portion 28 arranged on the exterior side of the vehicle, and a connecting wall portion 29 connecting the edges of the interior wall portion 27 and the exterior wall portion 28. In the embodiment, the connecting wall portion 29 is arranged over substantially the entire periphery of the interior wall portion 27 and the exterior wall portion 28. That is, the connecting wall portion 29 is configured to include a front upper wall portion 29a constituting the front upper surface side when the bag is fully inflated, a lower wall portion 29b constituting the lower surface side when the bag is fully inflated, and a rear wall portion 29c constituting the rear surface side when the bag is fully inflated. The bag body 26 is configured to widely cover the right side of the head MH of the driver MD seated on the seat 3 in the vertical and front-rear directions, with the rear lower end side of the bag body 26 positioned slightly above the vertical center of the backrest portion 4 when the bag is fully inflated. The bag body 26 is made of a flexible sheet, specifically, made of a woven fabric woven with polyester yarn, polyamide yarn, etc. The bag body 26 is made into a bag shape by sewing together the periphery of a base material cut into a predetermined shape made of this woven fabric, and in the case of the embodiment, only the region of the lower wall portion 29b of the connecting wall portion 29 is made of three layers of the base material 26d (see Figs. 7 and 8).

[0022] The bag body 26 is provided with an intake hole 35 through which the atmosphere A can flow in when the bag body 26 is deployed downward. The intake hole 35 is provided in the region of the connecting wall portion 29, and in the case of the embodiment, specifically, in the region of the lower wall portion 29b which is the lower surface side when the bag body 26 is fully inflated (see Figs. 6 to 8). The intake hole 35 includes a hole body 36 formed by opening the lower wall portion 29b, and a check valve mechanism 37 capable of closing the hole body 36. In the case of the embodiment, the hole body 36 is formed in an elongated hole shape with a wider width on the front-rear direction side at a position that is approximately the center of the bag body 26 in the front-rear direction. The check valve mechanism 37 is configured to include two valve bodies 38, 39 that are elongated and capable of closing the hole body 36, and are arranged so as to be stacked on the top-bottom direction side when the bag body 26 is fully inflated. The valve bodies 38, 39 are formed of a flexible sheet body (woven fabric made of polyester yarn, polyamide yarn, or the like) similar to the base material constituting the bag body 26, and each has one end 38a, 39a in the longitudinal direction facing each other in a stacked state, which is connected to the lower wall portion 29b, and the other end 38b, 39b is a free end (see FIG. 8). The intake hole 35 is closed when the airbag 25 is in the stored state, and when the bag body 26 is deployed downward, the valve bodies 38, 39 are lifted up due to air resistance acting on the lower wall portion 29b, and the atmosphere A flows into the bag body 26 from the hole body 36 opened to lift up the valve bodies 38, 39 (see A in FIG. 9). After the bag body 26 moves downward (after the expansion of the bag body 26 is completed), the hole body 36 of the air intake hole 35 is subjected to the pressure of the atmosphere A that has flowed into the inside of the bag body 26 and is blocked by the two valve bodies 38, 39 (see B in Figure 9), so that the atmosphere A that has flowed into the inside is prevented from flowing back to the outside, and the bag body 26 is maintained in an expanded state.

[0023] The connecting tab 42, which connects the upper edge side of the bag body 26 to the roof 7, is attached to the right edge 7a side of the roof 7, although detailed illustration is omitted. The connecting tab 42 is formed at multiple locations along the front-to-rear direction so as to extend from the front upper edge 26a side of the bag body 26, and in the case of this embodiment, it is formed at four locations including the front upper end side and the rear upper end side of the bag body 26. The connecting tab 42 is formed from a sheet body (woven fabric woven with polyester yarn, polyamide yarn, etc.) having the same flexibility as the base material constituting the bag body.

[0024] The connecting belt portion 45, which is arranged to extend rearward from the rear lower end side of the bag body 26 when the bag body is fully deployed, is configured to have a connecting ring portion 46 inserted through the guide pole 10 disposed on the tip 45a side, and the rear end side (specifically, the rear lower end side) of the bag body 26 is configured to be connected to the guide pole 10 using this connecting ring portion 46. In the embodiment, the connecting belt portion 45 is formed from a sheet body (woven fabric woven from polyester yarn, polyamide yarn, etc.) having flexibility similar to the base material constituting the bag body 26, and the length dimension is set to a dimension that does not hinder the falling of the connecting ring portion 46 along the guide pole 10 when the bag body 26 is fully deployed, positions the connecting ring portion 46 approximately directly below the stopper 18, and enables tension to be generated between the connecting belt portion 45 and the lower edge 26b side of the bag body 26 approximately along the front-rear direction.

[0025] In the embodiment, the connecting ring portion 46 is made of a metal such as aluminum or an aluminum alloy, and is in the shape of a circular ring plate through which the guide pole 10 can be inserted. Specifically, the connecting ring portion 46 is set to a dimension that allows the guide pole 10 to slide smoothly when the airbag 25 falls along the guide pole 10, and allows the stopper 18 to be inserted therethrough. When the airbag 25 is folded and stored on the right edge 7a side of the roof 7, the connecting ring portion 46 is configured such that the part on the inner peripheral edge 46a side is inserted into the locking groove 14a formed on the outer peripheral surface side of the movable iron core portion 14 of the locking member 12, as described above, and is locked by the locking member 12 (see A in FIG. 3). After the locking by the locking member 12 is released (see B in FIG. 3), the bag falls freely along the guide pole 10 due to gravity, and at this time, the bag body 26 also unfolds downward due to gravity. That is, in the head protection airbag device M of the embodiment, the guide means GM that guides the downward deployment of the airbag 25 is configured to utilize gravity as a driving source for deploying the airbag 25 downward, and the airbag 25 deploys downward by free fall while being guided by the guide pole 10.

[0026] Although detailed illustration is omitted, the airbag 25 of the embodiment is configured such that the bag body 26 is folded into a generally belt-like shape so that the width dimension in the vertical direction can be reduced while the lower wall portion 29b is maintained in a flat deployed state, and this folded folded body 50 is attached to the right edge 7a side of the roof 7 while maintaining the folded state by a wrapping material (not shown) that can be broken when the bag body 26 moves downward. At this time, the connecting ring portion 46 is engaged with the engaging member 12 while being inserted into the guide pole 10.

[0027] In the head protection airbag device M of the embodiment, when an external force is applied from the side (right) of the vehicle V, the locking member 12 releases the locking state of the connecting ring portion 46 upon receiving an activation signal from a control circuit (not shown), and the bag body 26 folded and arranged on the edge (right edge 7a) side of the roof 7 unfolds and deploys downward. At this time, the bag body 26 is inflated by allowing the atmosphere A to flow into the bag body 26 through the intake hole 35 formed on the lower wall portion 29b side, and the airbag 25 (bag body 26) that has completed the inflation is arranged to cover the side (right) of the head MH of the driver MD (see FIGS. 10 and 11).

[0028] In the head protection airbag device M of the embodiment, the airbag 25 (bag body 26) is configured to inflate by allowing air to flow into the airbag 25 through the air intake hole 35 when deployed downward. That is, the head protection airbag device M of the embodiment does not require a gas supply member such as an inflator for supplying inflation gas to the airbag 25, and can be configured simply. The air intake hole 35 is formed in the airbag 25 (bag body 26) in the region of the connecting wall portion 29 that connects the edges of the vehicle interior wall portion 27 and the vehicle exterior wall portion 28, so that the air intake hole 35 is stably opened when deployed downward, allowing air to smoothly flow into the airbag 25. In addition, in the head protection airbag device M of the embodiment, the airbag 25 is configured to be guided in its downward deployment by the guide means GM, so that even if the airbag 25 is configured to inflate by allowing air A to flow into the airbag 25, it can be quickly deployed downward to cover the side of the head MH of the driver MD as an occupant.

[0029] Therefore, the head protecting airbag device M of the embodiment can protect the head MH of the driver MD as an occupant with a simple configuration.

[0030] In the head protection airbag device M of the embodiment, the guide means GM is configured to include a guide pole 10 on the vehicle body side arranged so as to be substantially aligned in the vertical direction behind the airbag 25 when the airbag 25 is fully deployed, and a connecting ring portion 46 arranged on the airbag 25 side and capable of sliding the guide pole 10 when the airbag 25 is deployed. The airbag 25 is configured to be deployed downward by free fall while being guided by the guide pole 10, using gravity as a driving source for deploying the airbag 25 downward. That is, in the head protection airbag device M of the embodiment, the airbag 25 is configured to be deployed downward by free fall using its own weight, so that a driving means for deploying the airbag downward is not required, and the configuration can be further simplified. In particular, in the airbag 25 of the embodiment, the lower wall portion 29b of the connecting wall portion 29 arranged on the lower surface side when the airbag 25 is fully deployed is configured by stacking three base materials 27d, so that the airbag can be smoothly deployed downward when deployed.

[0031] Furthermore, in the head protection airbag device M of the embodiment, the intake hole 35 is configured to include a hole body 36 formed by opening the connecting wall portion 29, and a check valve mechanism 37 capable of closing the hole body 36. Therefore, since the atmosphere A (air) that once flowed into the airbag 25 can be prevented from flowing out to the outside, the airbag 25 can maintain a high internal pressure, and the inflated airbag 25 can adequately protect the head MH of the driver MD.

[0032] Specifically, in the head protection airbag device M of the embodiment, the intake hole 35 is disposed in an area of ​​the lower wall portion 29b that is the lower surface side of the airbag when the airbag 25 is fully inflated. Therefore, when the airbag 25 is deployed downward, a large amount of air can flow in through the intake hole 35, and the airbag 25 can be inflated quickly.

[0033] Also, the air intake hole 35A may be arranged in the connecting wall 29A in a region (rear side) of the rear wall 29c that is disposed substantially along the up-down direction when the airbag is fully inflated, as in the airbag 25A (bag body 26A) shown in Fig. 12. The air intake hole 35A is formed in a region below the center between the up-down direction of the rear wall 29c. With the airbag 25A arranged in this way, rapid inflation is suppressed compared to the case where the air intake hole is provided in the region of the lower wall 29b on the lower side, as in the airbag 25 described above. However, air resistance generated around the periphery of the air intake hole 35A is suppressed, so that the airbag 25A can be deployed stably downward while suppressing flapping. In the embodiment, the rear wall portion 29c of the bag body 26A is configured to be inclined downward toward the front with respect to the vertical direction when the airbag 25A is fully inflated. Therefore, compared to a case in which the rear wall portion is positioned approximately along the up-down direction, it is easier for air to flow in through the air intake hole 35A when the airbag 25A is deployed downward, and the airbag 25A can be inflated quickly.

[0034] In the head protection airbag device of the embodiment, an electromagnetic solenoid is used as the driving source for the holding means that holds the connecting ring portion, but the driving source for the holding means is not limited to an electromagnetic solenoid, and for example, an actuator that is capable of generating a small amount of driving gas when activated, or a biasing means such as a spring may also be used.

[0035] In the embodiment, the head protection airbag device M is described as being mounted on a one-person vehicle V that does not have doors. However, the vehicles in which the head protection airbag device of the present invention can be mounted are not limited to those described in the embodiment. The head protection airbag device can of course also be mounted on vehicles that have doors and can accommodate multiple passengers. [Explanation of symbols]

[0036] 3...seat, 10...guide pole, 25, 25A...airbag, 26, 26A...bag body, 27...inner wall portion, 28...outer wall portion, 29, 29A...connecting wall portion, 29b...lower wall portion, 29c...rear wall portion, 35, 35A...intake hole, 36...hole body, 37...check valve mechanism, 45...connecting belt portion, 46...connecting ring portion, GM...guide means, MD...driver (occupant), MH...head, M...head protection airbag device.

Claims

1. A head protection airbag device capable of protecting the head of an occupant seated in a vehicle seat, an airbag that is folded and disposed on the side of the occupant at an edge side of a roof of the vehicle and that is configured to deploy downward to cover the side of the occupant's head when an external force is applied from the side of the vehicle; A guide means for guiding the airbag downward from a stored position to a deployed position; The present invention is configured to include: the airbag has an interior wall portion that is disposed on the interior side of the vehicle when the airbag is fully inflated, an exterior wall portion that is disposed on the exterior side of the vehicle, and a connecting wall portion that connects edges of the interior wall portion and the exterior wall portion to each other, and an air intake hole that allows air to flow into the airbag when the airbag is deployed downward is disposed in the area of ​​the connecting wall portion, The guide means A guide pole on a vehicle body side that is disposed substantially along a vertical direction behind the airbag when the airbag is fully deployed; a connecting ring portion disposed on the airbag side and allowing the guide pole to slide when the airbag is deployed; A drive source that deploys the airbag downward; The present invention is configured to include: The head-protecting airbag device is configured so that the airbag utilizes gravity as the driving source and deploys downward by free fall while being guided by the guide pole.

2. 2. The head-protecting airbag device according to claim 1, wherein the intake hole comprises a hole body formed by opening the connecting wall portion, and a check valve mechanism capable of closing the hole body.

3. The airbag is configured such that, when viewed from the inside-outside direction, the fully inflated shape is a substantially triangular plate shape with a lower edge side substantially aligned along the front-rear direction, 3. A head-protecting airbag device according to claim 2, wherein the air intake hole is disposed on a lower surface side of the airbag when the airbag is fully inflated.

4. The airbag is configured such that, when viewed from the inside / outside direction, the airbag has a substantially triangular plate shape with a trailing edge that is substantially aligned in the up-down direction, 3. A head-protecting airbag device according to claim 2, wherein the air intake hole is disposed on a rear side of the airbag when the airbag is fully inflated.

5. A head protection airbag device capable of protecting the head of an occupant seated in a vehicle seat, an airbag that is folded and disposed on the side of the occupant at an edge side of a roof of the vehicle and that is configured to deploy downward to cover the side of the occupant's head when an external force is applied from the side of the vehicle; A guide means for guiding the airbag downward from a stored position to a deployed position; The present invention is configured to include: the airbag is configured such that when fully inflated, as viewed from the inside / outside direction, it has a generally triangular plate shape with its trailing edge generally aligned in the up-down direction, and has an interior wall portion that is disposed on the interior side of the vehicle when fully inflated, an exterior wall portion that is disposed on the exterior side of the vehicle, and a connecting wall portion that connects edges of the interior wall portion and the exterior wall portion to each other, and an air intake hole that allows air to flow into the interior when the airbag is deployed downward is disposed in the area of ​​the connecting wall portion, a head protection airbag device comprising: a hole body formed by opening the connecting wall portion; and a check valve mechanism capable of closing the hole body, the intake hole being disposed on a rear side of the airbag when inflation is complete.

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