JP2009184646A - Side airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount a side airbag body and an inflator on a vehicle seat in which a projecting part is installed at the lateral side end of a seat back rest and secure the deployment capability of the side airbag body. <P>SOLUTION: At the seat lateral side end of a vehicle seat 18 in the seat back rest 22, the inflator 12 is disposed on the projecting part attached to the side end while being offset in the height direction of the seat back rest 22. When a side collision occurs, a gas is supplied from the inflator 12 to the side airbag body 14, and the side airbag body is deployed. Since the deployment direction of the side airbag body 14 is controlled by a reaction force member 16 (deployment control means), the side airbag body 14 is suppressed to be interfered with the projecting part 24 or to be deployed out of a predetermined deployment area. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a side airbag device.

As a conventional side airbag device, an airbag module is disposed in a storage recess provided at an end of the seat back in the vehicle width direction, and the airbag is regulated so that the airbag is oriented in the deployment direction in the storage recess. A structure in which a guide plate is disposed is disclosed (see Patent Document 1).
JP 2001-130363 A Japanese Patent Laid-Open No. 10-230811

  However, depending on the vehicle seat, an overhanging part such as a lock device that is operated when the seat back is reclining may be provided at an end of the seat back in the seat width direction. In the conventional example described above, no consideration is given to the mounting of the airbag module on such a vehicle seat.

  In consideration of the above-mentioned fact, the present invention enables a side airbag bag body and an inflator to be mounted on a vehicle seat provided with an overhang component at an end portion in the seat width direction of the seat back. It aims at ensuring the expandability of this side airbag bag body.

  The invention of claim 1 is arranged at the seat width direction side end portion in the seat back of the vehicle seat, being offset in the height direction of the seat back with respect to the overhang component provided at the side end portion, An inflator capable of injecting gas at the time of a side collision, and side air that is folded and housed in front of the seat back from the overhanging part in the seat back and can be inflated and deployed by receiving gas supply from the inflator It has a bag bag body and a deployment control means for controlling the deployment direction of the side airbag bag body.

  In the side airbag device according to claim 1, the inflator is disposed at a seat width direction side end in the seat back of the vehicle seat in a seat back height direction with respect to an overhang component provided at the side end. Since the side airbag bag body is folded and stored on the front side of the seat back rather than the overhanging part in the seat back, the side airbag bag side end portion in the seat back is disposed. Even when the overhanging part is provided, the side airbag bag body and the inflator can be mounted.

  Further, in the side airbag device according to the first aspect, when a side collision occurs, the inflator is activated, gas is supplied to the side airbag bag body, and the side airbag bag body is deployed. At this time, since the deployment direction of the side airbag bag body is controlled by the deployment control means, the side airbag bag body may interfere with the overhanging part or be deployed out of a predetermined deployment area. Can be suppressed. For this reason, even if the inflator and the side airbag bag body are arranged as described above, it is possible to ensure the deployability of the side airbag bag body.

  According to a second aspect of the present invention, in the side airbag device according to the first aspect, the deployment control means is provided between the overhang component and the inflator, and the side airbag bag body is inflated and deployed at the side. It has the reaction force member which produces the reaction force with respect to an airbag bag body, It is characterized by the above-mentioned.

  In the side airbag device according to claim 2, the reaction force member provided between the overhang component and the inflator as the deployment control means is a reaction force against the side airbag bag body when the side airbag bag body is inflated and deployed. Give rise to Thereby, unnecessary interference between the side airbag bag body and the overhang component can be suppressed, and the side airbag bag body can be inflated and deployed at a desired timing.

  According to a third aspect of the present invention, in the side airbag device according to the second aspect, the reaction member includes a center of the side airbag bag body in a folded state, the inflator side of the overhang component, and the seat back. It is characterized in that the inflator side has an inclined surface along the direction connecting the front corner.

  In the side airbag device according to claim 3, a direction in which the inclined surface of the reaction member connects the center of the side airbag bag body in the folded state and the corner on the inflator side of the overhanging part and the front side of the seat back. Therefore, when the inflator is operated, gas is smoothly supplied from the inflator to the side airbag bag body. Further, since the reaction force can be generated on the side airbag bag body by the inclined surface of the reaction member, unnecessary interference between the side airbag bag body and the overhang component is suppressed, and the side airbag bag body is suppressed. Can be deployed in an appropriate direction. Thus, in the side airbag device according to the third aspect, it is possible to further enhance the deployability of the side airbag bag body.

  According to a fourth aspect of the present invention, in the side airbag device according to the first aspect, the inflator is disposed to be offset below the overhang component in the height direction of the seat back, and as the deployment control means, A reaction force member is provided on the upper side of the side airbag bag body in the height direction of the seat back, and generates a reaction force against the side airbag bag body when the side airbag bag body is inflated and deployed. It is said.

  In the side airbag device according to claim 4, the inflator is disposed to be offset below the overhang component in the height direction of the seatback, and is positioned below the side airbag bag body. The gas from the inflator is supplied upward in the height direction of the seat back toward the side airbag bag body. At this time, the side airbag bag body tends to be deployed upward in the height direction of the seat back. However, since a reaction force member that generates a reaction force against the side airbag bag body is provided on the upper side of the side airbag bag body, the reaction force member causes the side of the seat back to rise upward in the height direction. Expansion of the airbag bag body is suppressed. Thus, in the side airbag device according to the fourth aspect, the side airbag bag body can be deployed in an appropriate direction.

  According to a fifth aspect of the present invention, in the side airbag device according to the fourth aspect, the reaction force member is in a lying state so that the amount of forward projection of the seat back is reduced in a normal state, The bag bag body is configured to be rotatable to a predetermined position by the inflation pressure when the bag bag body is inflated and deployed.

  In the side airbag device according to the fifth aspect, the reaction member is in a lying state so that the amount of forward protrusion of the seat back is reduced in a normal state. For this reason, it is difficult to give an uncomfortable feeling to the passengers who get on and off the vehicle seat. The reaction force member can be rotated to a predetermined position by the inflation pressure when the side airbag bag body is inflated and deployed. Thereby, expansion | deployment of the side airbag bag body to the height direction upper direction of a seat back can be suppressed, and this side airbag bag body can be expand | deployed to a suitable direction.

  According to a sixth aspect of the present invention, in the side airbag device according to the first aspect, the gas ejection portion of the inflator is disposed on the overhanging component side, and the gas ejection portion communicates with the side airbag bag body. A gas supply pipe is connected, and as the expansion control means, it covers the connection part of the gas ejection part and the gas supply pipe, and regulates the gas flow to the overhanging part side, while the front side of the seat back It is characterized by having a lid body that allows gas flow to.

  In the side airbag device according to the sixth aspect, the gas ejected from the gas ejection portion during operation of the inflator is supplied to the side airbag bag body through the gas supply pipe connected to the gas ejection portion. At this time, the flow of gas to the overhang component side is regulated by the lid body that covers the connection portion between the gas ejection portion and the gas supply pipe. On the other hand, the gas flow to the front side of the seat back is allowed. For this reason, unnecessary interference between the side airbag bag body and the overhang component can be suppressed, and the developability of the side airbag bag body can be ensured.

  A seventh aspect of the invention is the side airbag device according to the sixth aspect, wherein the lid is made of a non-extensible cloth.

  In the side airbag device according to the seventh aspect, since the lid body is made of non-extensible cloth, an increase in the vehicle weight can be suppressed.

  According to an eighth aspect of the present invention, in the side airbag device according to the sixth or seventh aspect, a gas flow from the inflator is forwarded to the front side of the seat back by the lid in the gas supply pipe. It is characterized in that a reinforcing member that reinforces the part is disposed at the part to be regulated.

  In the side airbag device according to claim 8, the gas flowing from the gas ejection portion of the inflator and flowing through the ejection gas supply pipe is regulated to the front side of the seat back by the lid body and supplied to the side airbag bag body. The At this time, since the portion of the gas supply pipe where the gas flow is regulated by the lid is reinforced by the reinforcing member, the state of the gas supply pipe hardly changes. For this reason, even if the flow direction of the gas is regulated by the lid, the gas can be smoothly supplied to the side airbag bag.

  As described above, according to the side airbag device of the first aspect of the present invention, the side airbag is provided to the vehicle seat in which the overhang component is provided at the seat width direction side end portion of the seat back. An excellent effect is obtained that the bag bag body and the inflator can be mounted, and the developability of the side airbag bag body can be secured.

  According to the side airbag device of claim 2, it is possible to suppress unnecessary interference between the side airbag bag body and the overhang component, and to inflate and deploy the side airbag bag body at a desired timing. An excellent effect is obtained.

  According to the side airbag device of the third aspect, an excellent effect that the deployability of the side airbag bag body can be further improved is obtained.

  According to the side airbag device of the fourth aspect, it is possible to obtain an excellent effect that the side airbag bag body can be deployed in an appropriate direction.

  According to the side airbag device of the fifth aspect, it is possible to suppress the deployment of the side airbag bag body upward in the height direction of the seat back and to deploy the side airbag bag body in an appropriate direction. The excellent effect of being able to be obtained is obtained.

  According to the side airbag device of the sixth aspect, it is possible to suppress unnecessary interference between the side airbag bag body and the overhang component, and to ensure the deployability of the side airbag bag body. Effect is obtained.

  According to the side airbag device of the seventh aspect, it is possible to obtain an excellent effect that an increase in vehicle weight can be suppressed.

  According to the side airbag device of the eighth aspect, even if the gas flow direction is regulated by the lid, an excellent effect is obtained that gas can be smoothly supplied to the side airbag bag. .

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

[First Embodiment]
In FIG. 1, a side airbag device 10 according to the present embodiment includes an inflator 12, a side airbag bag body 14, and a reaction force member 16 as an example of a deployment control means.

  The inflator 12 is disposed in the seat width direction side end portion in the seat back 22 of the vehicle seat 18 so as to be offset in the height direction of the seat back 22 with respect to the overhang component 24 provided on the side end portion. This is a gas generating means capable of ejecting gas at the time of a side collision.

  Here, the seat back 22 is a component that constitutes a backrest of the occupant 42, and a seat back frame 28 is provided in the seat back 22. The seat back frame 28 is provided with a headrest 32 corresponding to the head 42H of the occupant 42.

  The seat back frame 28 includes a side frame 28A provided at an end portion in the seat width direction, and an upper pipe 28B that connects upper portions of the side frame 28A. For example, a net-like spring (not shown) is stretched on the side frame 28A. The seat back frame 28 is covered with a cushion material (not shown) molded in a predetermined shape, and the cushion material is further covered with a seat skin (not shown).

  As shown in FIG. 2, an overhang component 24 is provided on the outer surface of the upper portion of the side frame 28A. The overhang component 24 is a base frame of a lock device that is operated when, for example, the seat back 22 is reclined. Further, the overhang component 24 has a shape in which, for example, both ends in the height direction of the seat back 22 are opened.

  The inflator 12 is disposed so as to be offset below the overhang component 24 in the height direction of the seat back 22. The inflator 12 is configured to operate in response to an operating current from an air bag ECU (not shown), and the air bag ECU determines the side collision based on a signal from a side collision sensor (not shown). Is configured to flow an operating current.

  As the inflator 12, a gas generating agent enclosed type or a high pressure gas enclosed type may be used. A configuration example of the inflator 12 will be briefly described. In the case of the former type, a bottomed cylindrical housing having a plurality of gas ejection ports formed on the peripheral surface, and a combustion that is disposed in the housing and burned. A gas generating agent that generates gas, a filter that removes debris after combustion of the gas generating agent, and an electric ignition ignition device that is attached to an end of the opening side of the housing and burns the gas generating agent. It is configured to include.

  On the other hand, in the case of the latter type, a bottomed cylindrical housing, a pressure partition disposed in the housing, and argon, helium, etc. sealed in a chamber defined by the pressure partition and the housing. A mixed gas, a moving member that is movably disposed in the vicinity of the pressure partition, and that breaks the pressure partition by moving; an electric ignition type ignition device that is attached to an end of the housing on the opening side and moves the moving member; , Including.

  The gas ejection part 12A of the inflator 12 is disposed, for example, on the overhanging component 24 side, that is, on the upper side in the height direction of the seat back 22. The gas ejection portion 12A is provided with a plurality of gas ejection holes. A gas supply pipe 34 leading to the side airbag bag body 14 is connected to the gas ejection part 12A. The gas supply pipe 34 is configured using, for example, a non-extensible material. The gas supply pipe 34 may be a part integrally formed with the side airbag bag body 14, or may be a separate part connected to the side airbag bag body 14.

  As shown in FIG. 1 and FIG. 2, the side airbag bag body 14 is folded and housed in the seat back 22 in front of the overhanging part 24 with respect to the seat back 22 to supply gas from the inflator 12. In response, it is configured to be inflatable. The height dimension of the side airbag bag body 14 in the folded state is equal to the height dimension of the overhang component 24, for example. This is so that the reaction force at the initial stage of deployment of the side airbag bag body 14 can be efficiently generated in the overhang component 24.

  In the present embodiment, since the inflator 12 is disposed offset below the overhang component 24 in the height direction of the seat back 22, the gas supply pipe 34 extends from the gas ejection portion 12 </ b> A to the height of the seat back 22. It extends to the front side of the seat back 22 through the lower side of the overhanging part 24 in the direction and reaches the side airbag bag body 14. In the illustrated example, the side airbag bag body 14 is folded by bellows folding, but the folding method is not limited to this.

  1 and 2, the reaction force member 16 is provided between the overhang component 24 and the inflator 12 and generates a reaction force against the side airbag bag body 14 when the side airbag bag body 14 is inflated and deployed. It is.

  Specifically, the reaction force member 16 is attached to the lower end portion 24 </ b> A of the overhang component 24 so as to cover the lower opening portion of the overhang component 24. As the reaction force member 16, a plate-like member such as urethane, iron, or synthetic resin, or webbing is used. By providing such a reaction force member 16 at the lower end 24A of the overhang component 24, a reaction force is generated on the side airbag bag body 14 and the gas supply pipe 34 at the initial stage of deployment of the side airbag bag body 14, As a result, the gas supply pipe 34 and the side airbag bag body 14 can be prevented from entering the overhang component 24.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the side airbag device 10 according to the present embodiment, the inflator 12 is provided at the end in the seat width direction in the seat back 22 of the vehicle seat, that is, at the outer side of the side frame 28 </ b> A in the seat back frame 28. The side airbag bag body 14 is disposed in the seat back 22 more than the overhanging component 24 in the seat back 22 while being disposed offset with respect to the overhanging component 24 in the height direction of the seat back 22. Since it is folded and stored on the front side, the side airbag bag body 14 and the inflator 12 can be mounted even when the overhang component 24 is provided at the end in the seat width direction inside the seat back 22.

  In the side airbag device 10 according to the present embodiment, when the airbag ECU determines that a side collision has occurred based on a signal from the side collision sensor, an ignition current is caused to flow from the airbag ECU to the inflator 12. The inflator 12 is operated by the ignition current and ejects a large amount of gas from the gas ejection part 12A. The gas ejected from the gas ejection part 12 </ b> A is supplied to the side airbag bag body 14 through the gas supply pipe 34. Thereby, the side airbag bag body 14 starts to inflate and deploy.

  Here, the gas ejection part 12A of the inflator 12 is disposed on the overhanging part 24 side, and the gas supply pipe 34 connected to the gas ejection part 12A passes through the lower side of the overhanging part 24 and seat back 22 extends to the front side and reaches the side airbag bag body 14. Therefore, at the initial stage of deployment of the side airbag bag body 14, the gas supply pipe 34 and the side airbag bag body 14 tend to be displaced in the direction of entering the overhang component 24 due to the pressure of the gas from the inflator 12.

  However, in this embodiment, the reaction force member 16 is provided between the overhang component 24 and the inflator 12 as the expansion control means, and the reaction force member 16 enters the overhang component 24 into the gas supply pipe. A reaction force is generated on the side bag bag body 14 and the side airbag bag 14. Thereby, unnecessary interference between the side airbag bag body 14 and the overhang component 24, that is, the gas supply pipe 34 and the side airbag bag body 14 can be prevented from entering the overhang component 24. This also allows the side airbag bag body 14 to be inflated and deployed at a desired timing.

  Since the deployment direction of the side airbag bag body 14 is controlled by the reaction force member 16, the side airbag bag body 14 cleaves a part of the skin of the seat back 22 by the inflation pressure, and the seat back 22 In front of the vehicle, that is, to the side of the occupant 42. Thus, in this embodiment, even if the inflator 12 and the side airbag bag body 14 are arranged as described above, the deployability of the side airbag bag body 14 can be ensured.

  The reaction force at the initial stage of deployment of the side airbag bag body 14 can be taken at the front surface 24B of the overhang component 24. The interference between the side airbag bag body 14 and the overhang component 24 at this time does not correspond to unnecessary interference.

  In the present embodiment, the reaction force member 16 is attached to the lower end 24A of the overhang component 24. However, the arrangement of the reaction force member 16 is not limited to this, and the overhang component 24 and the inflator are not limited thereto. 12 and any configuration that can suppress unnecessary interference between the side airbag bag body 14 and the overhang component 24. Accordingly, the reaction force member 16 may be disposed away from the overhang component 24.

[Second Embodiment]
In FIG. 3, in the side airbag device 20 according to the present embodiment, the reaction force member 26 includes the center O of the side airbag bag body 14 in the folded state, the inflator 12 side of the overhang component 24, and the front of the seat back 22. An inclined surface 26A is provided on the inflator 12 side along the direction connecting the corner portion 38 on the side. The reaction force member 26 is attached to the lower end portion 24 </ b> A of the overhang component 24 so as to cover the lower opening portion of the overhang component 24.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 3, in the side airbag device 20 according to the present embodiment, the inclined surface 26A of the reaction member 26 includes the center O of the side airbag bag body 14 in the folded state, the inflator 12 side of the overhang component 24, and the seat back. 22, the gas is smoothly supplied from the gas ejection portion 12 </ b> A of the inflator 12 to the side airbag bag body 14 through the gas supply pipe 34 when the inflator 12 is operated. The

  In the present embodiment, when the side airbag bag body 14 is inflated and deployed, the inclined surface 26A of the reaction force member 26 can generate a reaction force on the side airbag bag body 14. Unnecessary interference between the bag body 14 and the overhang component 24 can be suppressed, and the side airbag bag body 14 can be deployed in an appropriate direction, that is, the front side of the seat back 22. Thus, in this embodiment, the developability of the side airbag bag body 14 can be further improved.

  In the present embodiment, the reaction force member 26 is attached to the lower end 24A of the overhang component 24. However, the arrangement of the reaction force member 26 is not limited to this, and the overhang component 24 and Any configuration may be employed as long as it is disposed between the inflator 12 and can suppress unnecessary interference between the side airbag bag body 14 and the overhang component 24. Therefore, the reaction force member 26 may be disposed away from the overhang component 24.

[Third Embodiment]
In FIG. 4, the side airbag device 30 according to the present embodiment includes a reaction force member 36 as an example of a deployment control means.

  The reaction force member 36 is provided on the upper side of the side airbag bag body 14 in the height direction of the seat back 22 and generates a reaction force on the side airbag bag body 14 when the side airbag bag body 14 is inflated and deployed. It is a member.

  Specifically, the reaction force member 36 is attached to, for example, the front surface 24B of the overhang component 24 in the fixing portion 36A. An eaves portion 36B extends from the upper edge of the fixed portion 36A to the front of the seat back 22. This eaves part 36B is extended in the seat back 22 to a position beyond the front end of the folded side airbag bag body 14, for example. The side edge of the eaves part 36B and the side edge of the fixing part 36A are connected by a side wall part 36C, and the eaves part 36B is supported by the side wall part 36C.

  Of the reaction force member 36, at least the eaves portion 36B and the side wall portion 36C are made of a relatively flexible material such as cloth, rubber, or synthetic resin. This is to make it difficult for the occupant 42 getting on and off the vehicle seat 18 to feel uncomfortable. In addition, the reaction force member 36 is a member that generates a reaction force against the side airbag bag body 14 when the side airbag bag body 14 is inflated and deployed, so that the inflation pressure of the side airbag bag body 14 can be received. Has strength.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 4, in the side airbag device 30 according to the present embodiment, at least the eaves part 36B and the side wall part 36C of the reaction force member 36 are made of a relatively flexible material. It is difficult to give a sense of incongruity to the passenger 42 getting on and off.

  Further, in the side airbag device 30 according to the present embodiment, the inflator 12 is offset and disposed below the overhang component 24 in the height direction of the seat back 22, as in the first embodiment. Since it is located below the bag bag body 14, when the inflator 12 is operated, the gas from the inflator 12 is directed upward in the height direction of the seat back 22 toward the side airbag bag body 14. Supplied. Accordingly, the side airbag bag body 14 tends to be deployed upward in the height direction of the seat back 22 in the initial stage of deployment.

  However, since a reaction force member 36 that generates a reaction force against the side airbag bag body 14 is provided on the upper side of the side airbag bag body 14, the side airbag toward the upper side in the height direction of the seat back 22 is provided. Expansion of the bag 14 is suppressed.

  Specifically, since the eaves portion 36B and the side wall portion 36C of the reaction force member 36 bend appropriately, the reaction force against the side airbag bag body 14 can be generated by receiving the side airbag bag body 14. The deployment of the side airbag bag body 14 in the upper direction of the seat back 22 is restricted. Thereby, the side airbag bag body 14 is developed toward the front side of the seat back 22. Thus, in the side airbag device 30 according to the present embodiment, the side airbag bag body 14 can be deployed in an appropriate direction.

[Fourth Embodiment]
In FIG. 6, the side airbag device 40 according to the present embodiment has a reaction force member 46 as an example of a deployment control means.

  The reaction member 46 is normally in a lying state so that the amount of forward protrusion of the seat back 22 is reduced, and can be rotated to a predetermined position by the inflation pressure when the side airbag bag body 14 is inflated and deployed. Has been. Specifically, the reaction force member 46 is a plate-like member made of, for example, metal or synthetic resin, and is configured to be rotatable on the front surface 24B of the overhang component 24 with a seat width direction as a rotation axis via a hinge 48. ing. At the rear end of the reaction force member 46, a stopper portion 46A that defines the upper limit of the rotation range of the reaction force member 46 is provided.

  The reaction force member 46 is in a lying state on the front lower side of the seat back 22 at a normal time. Along with this, the side airbag bag body 14 is folded so that the upper portion thereof is inclined downward in front of the seat back 22.

  As shown in FIG. 8, a notch 46 </ b> K is formed at a corner on the inner side in the sheet width direction of the front end of the reaction force member 46. The cutout portion 46K is cut out obliquely so as to follow the shape of the side support portion 62 of the seat back 22. By doing in this way, it is hard to give an uncomfortable feeling to the occupant 42 getting on and off the vehicle seat 18.

  From the viewpoint of generating abnormal noise during normal use, a torsion coil spring or the like (not shown) is provided at the hinge 48 portion, and the reaction force member 46 is urged below the seat back 22 during normal operation. There may be.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the side airbag device 30 according to the present embodiment, the reaction force member 46 is in a lying state so that the amount of forward protrusion of the seat back 22 is reduced in a normal state. For this reason, it is difficult to give an uncomfortable feeling to the occupant 42 getting on and off the vehicle seat 18.

  Further, in the side airbag device 40 according to the present embodiment, the inflator 12 is offset and disposed below the overhang component 24 in the height direction of the seat back 22, as in the first embodiment. Since it is located below the bag bag body 14, when the inflator 12 is operated, the gas from the inflator 12 is directed upward in the height direction of the seat back 22 toward the side airbag bag body 14. Supplied. Accordingly, the side airbag bag body 14 tends to be deployed upward in the height direction of the seat back 22.

  At this time, as shown in FIG. 7, the reaction force member 46 is pushed up by the side airbag bag body 14, and the stopper portion 46 </ b> A rotates to a position where it comes into contact with the upper part of the overhang component 24. When the stopper portion 46A comes into contact with the upper portion of the overhang component 24, further rotation of the reaction force member 46 is restricted. As a result, as shown in FIG. 8, the reaction force member 46 protrudes by a distance A to the front of the seat back 22 as compared with the normal time.

  Expansion of the side airbag bag body 14 in the height direction of the seat back 22 is restricted by the reaction force member 46 projecting as described above. Specifically, since the reaction force member 46 receives the side airbag bag body 14, a reaction force against the side airbag bag body 14 can be generated. Deployment of the air bag 14 is restricted. Thereby, the side airbag bag body 14 is developed toward the front side of the seat back 22. Thus, in the side airbag device 40 according to the present embodiment, the side airbag bag body 14 can be deployed in an appropriate direction.

[Fifth Embodiment]
In FIG. 9, the side airbag device 50 according to the present embodiment has a lid 56 as an example of a deployment control means.

  The lid 56 is placed on the connection part between the gas ejection part 12A and the gas supply pipe 34, and regulates the gas flow toward the overhanging part 24 (see FIG. 1), while the gas toward the front side of the seat back 22 is present. For example, it is a member made of metal or hard resin.

  Here, as shown in FIG. 10, a small diameter portion 12 </ b> C is provided at an end of the cylindrical housing 12 </ b> B of the inflator 12 on the gas ejection portion 12 </ b> A side. As shown in FIG. 9, the gas supply pipe 34 covers the inflator 12 up to a position covering the gas ejection part 12 </ b> A of the inflator 12 and the small diameter part 12 </ b> C.

  The lid 56 has an inner diameter that can be covered with the housing 12B of the inflator 12, and has a cylindrical portion 56A in which a notch 56K is formed on the front side of the seat back 22 (see FIG. 1). An upper wall portion 56B provided at the upper end and a groove portion 56C corresponding to a ring 52 described later are configured. The width of the notch 56K is set to be equal to or greater than the outer diameter of the gas supply pipe 34 when the gas pressure from the inflator 12 acts on the gas supply pipe 34. This is because the gas flows smoothly in the gas supply pipe 34. A ring 52 is fitted into the groove portion 56C of the lid body 56, and the lid body 56 is caulked together with the gas supply pipe 34 to the small diameter portion 12C of the housing 12B of the inflator 12 by the ring 52. Yes.

  Other portions are the same as those in the first to fourth embodiments, for example.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the side airbag device 50 according to the present embodiment, the gas ejected from the gas ejection part 12A during the operation of the inflator 12 passes through the side airbag bag body 14 (FIG. 1) through the gas supply pipe 34 connected to the gas ejection part 12A. Reference).

  At this time, the flow of gas toward the overhang component 24 (see FIG. 1) is restricted by the upper wall portion 56B of the lid 56 that covers the connection portion between the gas ejection portion 12A and the gas supply pipe. On the other hand, the flow of gas toward the front side of the seat back 22 (see FIG. 1) is allowed by the notch 56K of the lid 56. For this reason, useless interference with the side airbag bag body 14 and the overhang | projection component 24 can be suppressed, and the expandability of this side airbag bag body 14 can be ensured.

[Sixth Embodiment]
In FIG. 11, the side airbag device 60 according to the present embodiment has a lid 66 as an example of a deployment control means.

  The lid 66 is made of a non-extensible cloth, and is put on the connection part between the gas ejection part 12A and the gas supply pipe 34, and regulates the gas flow toward the overhanging part 24 (see FIG. 1). It is configured to allow a gas flow to the front side of the seat back 22 (see FIG. 1).

  Specifically, as shown in FIG. 12, the lid 66 has a rear side portion 66R having an inner diameter that can be covered with the housing 12B of the inflator 12, and a gas supply pipe communicating with the rear side portion 66R. 34 and a front side portion 66F through which 34 can be passed. In the rear side portion 66R, a lower end 66A located on the inflator 12 side opens, and an upper end 66B located on the overhanging component 24 (see FIG. 1) side is sewn and closed. On the other hand, in the front side portion 66F, an upper end 66C located on the side airbag bag body 14 (see FIG. 1) side opens, and a lower end 66D located on the opposite side of the upper end 66C is sewn and closed. The front side part 66F and the rear side part 66R communicate with the seat back 22 in the front-rear direction.

  As shown in FIG. 11, the gas supply pipe 34 is inserted into the front side portion 66F from the upper end 66C of the front side portion 66F, passed through the front side portion 66F from the front side portion 66F to the rear side portion 66R, and the rear side portion 66R. To the vicinity of the lower end 66A (FIG. 12). The gas supply pipe 34 is fixed to the housing 12B of the inflator 12, for example, using a fastening band (not shown), for example, together with the rear side portion 66R of the lid 66 in a state of covering the gas ejection portion 12A. .

  Other portions are the same as those in the first to fourth embodiments, for example.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the side airbag device 60 according to the present embodiment, the gas ejected from the gas ejection part 12A during the operation of the inflator 12 passes through the side airbag bag body 14 (FIG. 1) through the gas supply pipe 34 connected to the gas ejection part 12A. Reference).

  At this time, since the upper end 66B of the rear side portion 66R of the lid body 66 covering the connection portion between the gas ejection portion 12A and the gas supply pipe is closed, the projecting component 24 (see FIG. 1) side The gas flow to is regulated. On the other hand, since the gas supply pipe 34 is passed from the rear side portion 66R to the front side portion 66F in the lid 66, the gas flow to the front side of the seat back 22 (see FIG. 1) is allowed. . For this reason, useless interference with the side airbag bag body 14 and the overhang | projection component 24 can be suppressed, and the expandability of this side airbag bag body 14 can be ensured.

  In particular, in the present embodiment, since the lid 66 is made of a non-extensible cloth, an increase in vehicle weight can be suppressed.

[Seventh Embodiment]
In FIG. 13, the side airbag device 70 according to the present embodiment includes a reinforcing member 58 in addition to the same configuration as the side airbag device 50 (see FIGS. 9 and 10) according to the fifth embodiment. ing.

  The reinforcing member 58 reinforces the portion of the gas supply pipe 34 where the gas flow from the inflator 12 is restricted to the front side of the seat back 22 (see FIG. 1) by the lid 56. It is arranged.

  Specifically, in FIG. 14, the lid body 56 is a member obtained by sewing a non-extensible cloth into a cylindrical shape, for example, before connecting the gas supply pipe 34 to the inflator 12. The gas supply pipe 34 is inserted in a folded state. As shown in FIG. 13, in the state where the gas supply pipe 34 is connected to the inflator 12, the rear portion 58 </ b> R of the reinforcing member 58 is disposed around the gas ejection portion 12 </ b> A of the inflator 12. On the other hand, the front portion 58F of the reinforcing member 58 is disposed close to or in contact with the inner wall of the gas supply pipe 34 located in front of the gas ejection portion 12A.

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

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the side airbag device 70 according to the present embodiment, the gas ejected from the gas ejection part 12A during the operation of the inflator 12 passes through the side airbag bag body 14 (FIG. 1) through the gas supply pipe 34 connected to the gas ejection part 12A. Reference).

  At this time, the flow of gas toward the overhang component 24 (see FIG. 1) is restricted by the upper wall portion 56B of the lid 56 that covers the connection portion between the gas ejection portion 12A and the gas supply pipe. On the other hand, the flow of gas toward the front side of the seat back 22 (see FIG. 1) is allowed by the notch 56K of the lid 56. As a result, the gas ejected from the gas ejection part 12A of the inflator 12 is regulated to the front side of the seat back 22 by the lid 56 and supplied to the side airbag bag body 14 when flowing in the gas supply pipe 34. Is done.

  At this time, in the present embodiment, the portion of the gas supply pipe 34 where the flow of gas is restricted by the lid 56 is reinforced by the reinforcing member 58, so that the state of the gas supply pipe 34 hardly changes.

  Specifically, the rear portion 58R of the reinforcing member 58 is disposed around the gas ejection portion 12A, and the front portion 58F is disposed in proximity to or in contact with the inner wall of the gas supply pipe 34 positioned in front of the gas ejection portion 12A. Therefore, a part of the pressure of the gas toward the front side of the seat back 22 can be received by the reinforcing member 58. For this reason, even if the flow direction of the gas is regulated by the lid, the gas supply pipe 34 is hardly changed, so that the gas can be smoothly supplied to the side airbag bag 14. Further, by this, unnecessary interference between the side airbag bag body 14 and the overhang component 24 can be suppressed, and the deployability of the side airbag bag body 14 can be ensured.

  In each of the above embodiments, the reaction force members 16, 26, 36, and 46 and the lids 56 and 66 are given as examples of the expansion control means. However, the expansion control means is not limited to these, Other means may be used as long as the deployment direction of the side airbag bag body 14 can be controlled.

1 and 2 relate to a first embodiment, and FIG. 1 is a side view showing a side airbag device. It is a perspective view which shows a side airbag apparatus. It is a side view which shows a side airbag apparatus in 2nd Embodiment. 4 and 5 relate to the third embodiment, and FIG. 4 is a side view showing the side airbag device. It is a side view which shows the state by which the reaction force member has suppressed the expansion | deployment of the side airbag bag body to the upper direction of the seat back at the time of expansion | deployment of a side airbag bag body. 6 to 8 relate to the fourth embodiment, and FIG. 6 is a side view showing the side airbag device. It is a side view which shows the state by which the reaction force member has suppressed the expansion | deployment of the side airbag bag body to the upper direction of the seat back at the time of expansion | deployment of a side airbag bag body. It is a cross-sectional view showing the difference in the protruding amount of the reaction force member between the normal time and the time when the side airbag bag body is deployed. 9 and 10 relate to the fifth embodiment, and FIG. 11 is a cross-sectional view showing a connection portion between the inflator and the gas supply pipe in the side airbag device. It is a disassembled perspective view which shows the connection part of the inflator and gas supply pipe | tube in a side airbag apparatus. FIGS. 11 and 12 relate to the sixth embodiment, and FIG. 11 is a cross-sectional view showing a connection portion between the inflator and the gas supply pipe in the side airbag device. It is a disassembled perspective view which shows the connection part of the inflator and gas supply pipe | tube in a side airbag apparatus. FIGS. 13 and 14 relate to the seventh embodiment, and FIG. 13 is a cross-sectional view showing a connection portion between the inflator and the gas supply pipe in the side airbag device. It is a disassembled perspective view which shows the connection part of the inflator and gas supply pipe | tube in a side airbag apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Side airbag apparatus 12 Inflator 12A Gas ejection part 14 Side airbag bag body 16 Reaction force member (deployment control means)
DESCRIPTION OF SYMBOLS 18 Vehicle seat 20 Side airbag device 22 Seat back 24 Overhang component 26 Reaction force member (deployment control means)
26A Inclined surface 30 Side airbag device 34 Gas supply pipe 36 Reaction force member (deployment control means)
38 corner portion 40 side airbag device 42 occupant 46A stopper portion 46 reaction force member (deployment control means)
46K Notch 50 Side airbag device 56 Lid (deployment control means)
58 Reinforcing member 60 Side airbag device 66 Lid (deployment control means)
70 Side airbag device O Center of side airbag bag body

Claims (8)

At the end in the seat width direction in the seat back of the vehicle seat, it is arranged to be offset in the height direction of the seat back with respect to the overhang component provided at the side end, and gas can be ejected at the side collision Inflators,
Inside the seat back, the side airbag bag body that is folded and housed on the front side of the seat back than the overhanging part and that can be inflated and deployed by receiving the supply of gas from the inflator,
Deployment control means for controlling the deployment direction of the side airbag bag;
A side airbag device comprising:   The deployment control means includes a reaction force member that is provided between the overhang component and the inflator and that generates a reaction force against the side airbag bag body when the side airbag bag body is inflated and deployed. The side airbag device according to claim 1.   The reaction force member has an inclined surface along a direction connecting the center of the side airbag bag body in a folded state and the corner on the inflator side and the front side of the seat back of the overhanging part on the inflator side. The side airbag device according to claim 2, wherein the side airbag device is provided in the side airbag device. The inflator is disposed below the overhang component in the height direction of the seat back and is offset;
As the deployment control means, a reaction force is provided on the upper side of the side airbag bag body in the height direction of the seat back, and generates a reaction force against the side airbag bag body when the side airbag bag body is inflated and deployed. The side airbag device according to claim 1, further comprising a member.   The reaction force member is normally laid down so that the amount of forward projection of the seat back is reduced, and can be rotated to a predetermined position by the inflation pressure when the side airbag bag body is inflated and deployed. The side airbag device according to claim 4, wherein the side airbag device is provided. The gas ejection portion of the inflator is disposed on the overhanging component side,
A gas supply pipe leading to the side airbag bag body is connected to the gas ejection part,
As the expansion control means, it covers the connection part of the gas ejection part and the gas supply pipe, and regulates the gas flow to the overhanging part side while allowing the gas flow to the front side of the seat back The side airbag device according to claim 1, further comprising: a lid body that performs the operation.   The side airbag device according to claim 6, wherein the lid is made of a non-extensible cloth.   In the gas supply pipe, a reinforcing member that reinforces the part is disposed at a part where the flow of gas from the inflator is restricted to the front side of the seat back by the lid. The side airbag device according to claim 6 or 7.

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