WO2018079093A1

WO2018079093A1 - Airbag, passenger support device, and variable volume device

Info

Publication number: WO2018079093A1
Application number: PCT/JP2017/032503
Authority: WO
Inventors: 鈴木　信太郎
Original assignee: アイシン精機株式会社
Priority date: 2016-10-25
Filing date: 2017-09-08
Publication date: 2018-05-03
Also published as: JP2018069799A; JP6883194B2

Abstract

This airbag is provided with a first bag section and a second bag section. The first bag section has first and second pressing surfaces that are oriented in opposite directions. The second bag section is connected with the first bag section through a hole provided in the first pressing surface, and is smaller in size than the first bag section. Furthermore, a leading end portion of an air tube disposed along the first pressing surface is connected to the second bag section.

Description

Air bag, occupant support device, and variable volume device

The present invention relates to an air bag, an occupant support device, and a variable volume device.

2. Description of the Related Art Conventionally, there is an occupant support device having an air bag disposed between an abutting portion for an occupant seated on a vehicle seat and a base member provided inside the abutting portion. For example, Patent Document 1 discloses a configuration in which the seat support shape is changed by expanding and contracting an air bag (bladder) provided inside the seat.

Further, in this conventional example, the bag portion of the air bag is formed by bonding two sheet materials (cloth). That is, by adopting such a configuration, the two sheet members form first and second pressing surfaces that face in opposite directions. Furthermore, when these sheet materials are bonded together, the air tube can be easily connected to the bag portion by sandwiching the air tube. As a result, the workability can be improved and the cost can be reduced.

JP2015-96403A JP 2004-201942 A

However, as shown in FIGS. 14A and 14B, when the configuration in which the air bag 50 is placed on the support surface 53s of the base member 53 as shown in FIG. , The posture of the air bag 50 changes so that the other end side is lifted with the one end side to which the air tube 61 is connected as a fulcrum. In the occupant support device as described above, the change in the attitude of the air bag 50 impairs the aesthetics of the abutment portion constituting the design surface of the device, or the occupant's body is in the abutment portion. There is a possibility that a problem such as a poor feeling when touched may occur.

14C, when the pressing surface S of the air bag 50 is fixed to the support surface 53s of the base member 53, the air tube 61 connected to the side end portion of the air tube 61 There is a possibility of local bending due to the expansion of the bag 50. This may hinder smooth expansion / contraction of the air bag 50.

In addition, for example, the air bag described in Patent Document 2 is provided with a communication tube portion serving as an intake / exhaust port (supply / exhaust port) on the pressing surface of the bag portion (air bag body), and an air tube ( Hose) is connected. And by employ | adopting such a structure, a bag part can be expanded / contracted with the stable attitude | position in which the press surface faced one direction (for example, the support surface side of a base member).

However, when the cylindrical member serving as the connection portion of the air tube is arranged so as to intersect the pressing surface of the bag portion, when the compressed air bag is touched, the cylindrical member feels as a protruding foreign object. There is a possibility that. As a result, there is a possibility that the texture may be lowered, so that there is still room for improvement in this respect.

An object of the present invention is to provide an air bag that is excellent in texture and can be smoothly expanded and contracted in a stable posture, and an occupant support device and a volume variable device provided with the air bag.

An air bag that solves the above-described problems is provided with a first bag portion having first and second pressing surfaces facing in opposite directions and a hole portion provided in the first pressing surface. 2nd bag part smaller than this 1st bag part connected to 1 bag part, Comprising: The said 2nd bag part to which the front-end | tip part of the air tube arrange | positioned along the said 1st pressing surface is connected It is preferable to provide the bag part.

It is preferable that an occupant support device that solves the above problems includes a contact portion for an occupant seated on a vehicle seat, a base member provided inside the contact portion, and the air bag. The air bag is arranged between the contact portion and the base member, and the contact portion is displaced by expansion and contraction of the air bag.

It is preferable that the variable volume device that solves the above-described problems includes a wall portion of a storage space provided in a vehicle compartment, a base member provided inside the wall portion, and the air bag. The air bag is arranged between the wall portion and the base member and is configured to change the volume of the accommodation space when the wall portion is displaced based on expansion and contraction of the air bag.

Explanatory drawing of the air bag provided in the inner side of the armrest provided in the inner panel of the vehicle door, and the elbow rest part. The perspective view of the air bag mounted in the base member of the armrest of FIG. The top view of the air bag mounted in the base member of the armrest of FIG. The bottom view of the air bag of FIG. The side view of the air bag of FIG. (A) (b) is sectional drawing of the air bag provided inside the armrest of FIG. 1 (the VI-VI cross section in FIG. 3, a: contraction state, b: expansion state). The perspective view of the 3rd sheet | seat material of the air bag of FIG. Sectional drawing of the air bag provided inside the armrest of FIG. 1 (VIII-VIII cross section in FIG. 3). Sectional drawing of the air bag provided inside the armrest of FIG. 1 (IX-IX cross section in FIG. 3). Explanatory drawing of the state which the 3rd sheet | seat material sticking to the 1st press surface by exhaust | gas_blocking a hole part. (A) is sectional drawing of the air bag of another example, (b) is a top view which shows the several protrusion surrounding the circumference | surroundings of the air hole provided in the 1st press surface of the air bag shown to (a). . Explanatory drawing of the armrest provided in the center console, and the air bag provided in the inside. The schematic structure figure of the air bag provided under the lower wall part of the console box, and the volume variable apparatus provided with this air bag. (A)-(c) is explanatory drawing which shows the air bag of a prior art.

Hereinafter, an embodiment in which an air bag of an occupant support device is embodied in an armrest provided on a vehicle door will be described with reference to the drawings.
As shown in FIG. 1, the inner panel 2 of the vehicle door 1 is provided with an armrest 3 used by a seat occupant (not shown) disposed on the side of the vehicle door 1. Specifically, the armrest 3 has an elbow rest 4 having a design surface 4s facing upward. Then, the armrest 3 of the present embodiment is configured so that an occupant seated on the seat can place an arm part (for example, the forearm part beyond the elbow) on the design surface 4s of the elbow rest part 4. It has become.

Further, the armrest 3 of the present embodiment includes an air bag 10 provided inside the armrest 3 at a position below the elbow rest portion 4. Specifically, the air bag 10 is connected to an intake / exhaust device 12 via an air tube 11 serving as an air flow path L. In addition, the air tube 11 of this embodiment is formed using the soft resin which can be elastically deformed. The operation of the intake / exhaust device 12 is controlled by the control device 13. Further, an operation input signal Scr for an operation switch (not shown) is input to the control device 13. And the control apparatus 13 of this embodiment is a structure which controls the action | operation of the intake / exhaust apparatus 12 based on this operation input signal Scr.

That is, the air bag 10 of the present embodiment expands when air is pumped through the air tube 11 and contracts when the internal air is discharged. Moreover, as for the armrest 3 of this embodiment, when this air bag 10 expands and contracts, the elbow rest part 4 located in the upper part displaces. Specifically, in the armrest 3 of the present embodiment, a soft material is used for the elbow rest 4. And the armrest 3 of this embodiment becomes a structure by which the design surface 4s of the elbow rest part 4 is displaced to an up-down direction by this.

Further, the control device 13 according to the present embodiment operates the intake / exhaust device 12, that is, the air bag so that the elbow rest portion 4 of the armrest 3 is displaced according to the operation request of the occupant indicated by the operation input signal Scr. The intake / exhaust control for 10 is executed. And the armrest 3 of this embodiment is a structure which supports the passenger | crew's passenger | crew with the stable attitude | position via the elbow rest part 4 used as the contact part by this.

(Air bag)
Next, the structure and arrangement of the air bag 10 provided on the armrest 3 of the present embodiment will be described.

As shown in FIGS. 2 to 5, the air bag 10 of the present embodiment includes a first bag portion 20 that is inflated into a flat and substantially square box shape when air is pumped through an air tube 11. Specifically, the first bag portion 20 overlaps two

sheet materials

21 and 22 cut into a substantially rectangular shape in the thickness direction, and welds the peripheral portions of the

respective sheet materials

21 and 22 to each other. It is formed by. And the 1st bag part 20 becomes the 1st and 2nd press surface S1, S2 in which the

outer surfaces

21s and 22s of the

sheet materials

21 and 22 face the mutually opposing direction at the time of the expansion by this. It is configured as follows.

As shown in FIGS. 2, 3, 6 (a) and 6 (b), the air bag 10 of the present embodiment is at a position below the elbow rest 4 (lower side in FIG. 6). The base member 23 is placed on the support surface 23 s of the base member 23 provided inside the armrest 3. Specifically, the air bag 10 is in a state in which the first sheet material 21 constituting the first pressing surface S1 in the first bag portion 20 is directed downward with respect to the support surface 23s of the base member 23. It is placed. Further, the air bag 10 placed on the support surface 23s, specifically, the groove portion 24 extending in the longitudinal direction of the first bag portion 20 is formed on the support surface 23s of the base member 23. And the air tube 11 of this embodiment becomes a structure wired inside this groove part 24. As shown in FIG.

More specifically, as shown in FIG. 4 to FIG. 6B, in the air bag 10 of the present embodiment, the first sheet material 21 of the first bag portion 20 includes the first sheet material at the central portion thereof. The hole 25 which penetrates the sheet material 21 in the thickness direction is provided. Moreover, the air bag 10 of this embodiment is provided with the 2nd bag part 30 smaller than the said 1st bag part 20 connected to the 1st bag part 20 through this hole part 25. As shown in FIG. Further, in the second bag portion 30, the longitudinal direction of the air bag 10, that is, the extending direction of the air tube 11 arranged along the first pressing surface S 1 by being disposed in the groove portion 24. A connection hole 31 is provided in the opening. And the air bag 10 of this embodiment becomes a structure by which the front-end | tip part 11a of the air tube 11 is connected with respect to this connection hole 31. FIG.

More specifically, as shown in FIGS. 4, 5, and 7, in the air bag 10 of the present embodiment, the second bag portion 30 is the first pressing surface S 1 in the first bag portion 20, that is, The third sheet material 33 is bonded to the outer surface 21 s of the first sheet material 21 constituting the first bag portion 20 at a position covering the hole 25. Specifically, the third sheet material 33 is cut smaller than the first sheet material 21. The third sheet material 33 includes a rectangular portion 33a extending in the longitudinal direction of the air bag 10 and a semicircular shape provided on one end in the longitudinal direction of the rectangular portion 33a (the right end portion in FIG. 4). Part 33b. The third sheet material 33 is affixed to the outer surface 21 s of the first sheet material 21 in such a manner that the center of the semicircular portion 33 b is aligned with the hole 25.

Moreover, as shown in FIGS. 6A, 6B, and 8, in the air bag 10 of the present embodiment, the air tube 11 uses the third sheet material 33 as the first sheet as described above. When being bonded to the outer surface 21 s of the material 21, the tip end portion 11 a is sandwiched between the rectangular portion 33 a and the first sheet material 21 in the third sheet material 33. And as for the air bag 10 of this embodiment, the connection hole 31 is formed when the rectangular part 33a in the 3rd sheet | seat material 33 closely_contact | adheres to the front-end | tip part 11a of the air tube 11 from radial direction by this. That is, the distal end portion 11 a of the air tube 11 disposed along the first pressing surface S 1 is connected to the second bag portion 30.

Further, as shown in FIG. 6B and FIG. 9, the second bag portion 30 is connected to the hole portion 25 and the connection hole 31 at a portion covering the hole portion 25 provided in the first sheet material 21. A communication portion 32 is formed between the air tube 11 (the tip portion 11a thereof). In the air bag 10 of the present embodiment, the air pressure-fed through the air tube 11 flows into the first bag portion 20 and the air in the first bag portion 20 is air tube. 11 is configured to be discharged to the outside through 11.

Thus, the air bag 10 of the present embodiment generates a pressing force when the first bag portion 20 having the first and second pressing surfaces S1, S2 expands and contracts. And the 2nd bag part 30 connected to the 1st bag part 20 via the hole part 25 provided in the 1st press surface S1 becomes a structure which functions as the connection part 40 of the air tube 11. FIG. Yes.

That is, by providing the connection portion 40 of the air tube 11 on the first pressing surface S1, the first bag 20 has the first pressing surface S1 that is the support surface 23s of the base member 23 regardless of the expansion / contraction state. Is maintained in a stable posture. Furthermore, the second bag portion 30 can be minimized by not obtaining a function for generating a pressing force on the second bag portion 30 constituting the connection portion 40. In other words, by suppressing the volume change due to expansion / contraction, the position of the second bag portion 30 to which the tip end portion 11a of the air tube 11 is connected hardly changes regardless of the expansion / contraction state of the first bag portion 20. . And the air bag 10 of this embodiment is the structure by which the 1st bag part 20 expands / contracts smoothly by suppressing the local bending of the air tube 11 by this.

In the contracted state, the second bag portion 30 has substantially the same thickness as the third sheet material 33 constituting the second bag portion 30. Furthermore, the front-end | tip part 11a of the air tube 11 connected to this 2nd bag part 30 is arrange | positioned along 1st press surface S1. That is, the distal end portion 11 a of the air tube 11 is configured to be easily crushed by being pressed in the radial direction via the first and

second sheet materials

21 and 22 constituting the first bag portion 20. Yes. And the air bag 10 of this embodiment is a structure which maintains the favorable tactile sense by which the connection part 40 of the air tube 11 is not felt as a protrusion-like foreign material by this even in a contracted state.

The armrest 3 of this embodiment arranges the air bag 10 configured as described above between the elbow rest portion 4 and a base member 23 provided inside the elbow rest portion 4. And thereby, the elbow rest part 4 can be smoothly displaced by expansion / contraction of the air bag 10, maintaining the aesthetics and feel of the design surface 4s.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The air bag 10 includes a first bag 20 having first and second pressing surfaces S1 and S2 facing in opposite directions, and a hole 25 provided in the first pressing surface S1. And a second bag portion 30 smaller than the first bag portion 20 communicating with the first bag portion 20 via the first bag portion 20. The tip part 11a of the air tube 11 arrange | positioned along the 1st press surface S1 in the 1st bag part 20 is connected to the 2nd bag part.

According to the above configuration, by causing the second bag portion 30 provided at a position adjacent to the first pressing surface S1 to function as the connecting portion 40 of the air tube 11, the first pressing surface S1 is unidirectional. The 1st bag part 20 can be expanded / contracted with the stable attitude | position which faced (the support surface 23 side of the base member 23). Moreover, the 2nd bag part 30 can be minimized by not calculating | requiring the function which generate | occur | produces pressing force in the 2nd bag part 30. FIG. And by this, the position of the 2nd bag part 30 which functions as the connection part 40 of the air tube 11 does not move regardless of the expansion / contraction state of the 1st bag part 20 by restraining the volume change by the expansion / contraction small. Can be. As a result, local bending of the air tube 11 can be suppressed, and the first bag portion 20 can be expanded and contracted smoothly.

Further, the distal end portion 11 a of the air tube 11 connected to the second bag portion 30 is pressed in the radial direction via the first and

second sheet materials

21 and 22 constituting the first bag portion 20. Therefore, the structure is easily crushed. As a result, even in the contracted state, it is possible to maintain a good tactile sensation in which the connecting portion 40 of the air tube 11 provided on the first pressing surface S1 is not felt as a protruding foreign object.

(2) The 2nd bag part 30 is provided with the 3rd sheet | seat material 33, and the 1st sheet | seat material 21 (outside surface 21s) which comprises 1st press surface S1 in the position which covers the hole part 25. The third sheet material 33 is bonded to each other.

According to the above configuration, the second bag portion 30 can be formed simply and easily. And when bonding the 3rd sheet | seat material 33 to 1st press surface S1, sandwiching the front-end | tip part 11a of the air tube 11 between these 1st press surfaces S1 and the 3rd sheet | seat material 33. Thereby, the front-end | tip part 11a of the air tube 11 can be connected to the 2nd bag part 30 easily.

(3) The first bag portion 20 includes two

sheet materials

21 and 22, and is formed by bonding these two

sheet materials

21 and 22 together. And the 2nd bag part 30 is provided in the position which covers the hole 25 provided in the center part of 1st press surface S1.

According to the above configuration, the first bag portion 20 can be formed simply and easily. In addition, the first bag portion 20 formed by bonding the two

sheet materials

21 and 22 in this manner has a feature that the central portion of each pressing surface (S1, S2) swells greatly. Therefore, about the 1st bag part 20 which has such composition, the 2nd bag part 30 provided in the position adjacent to the 1st press face S1 is used as connection part 40 of air tube 11, A remarkable effect can be obtained. And the remarkable effect can be acquired especially by providing the hole 25 covered with the 2nd bag part 30 in the center part of 1st press surface S1 which swells the most.

(4) The armrest 3 as an occupant support device includes an elbow rest portion 4 as a contact portion on which an arm portion of an occupant seated on a vehicle seat is placed, and a base provided inside the elbow rest portion 4 And a member 23. The air bag 10 is disposed between the elbow rest 4 and the base member 23.

According to the above configuration, the elbow rest portion 4 of the armrest 3 can be displaced in the vertical direction by the expansion and contraction of the air bag 10. As a result, the user of the armrest 3 can be supported in a more stable posture. Furthermore, when the air bag 10 is smoothly expanded and contracted in a stable posture, the elbow rest portion 4 can be smoothly displaced while maintaining the aesthetic appearance and feel of the design surface 4s. And thereby, a high texture can be ensured.

In addition, you may change the said embodiment as follows.
-In the said embodiment, the 1st bag part 20 decided to swell in flat flat square box shape. However, the shape is not limited thereto, and the shape may be arbitrarily changed as long as the first and second pressing surfaces S1 and S2 face in opposite directions. Moreover, although the 1st bag part 20 decided to bond two sheet |

seat materials

21 and 22, it may change arbitrarily also about the formation method. And the formation position of the hole 25 may be arbitrarily changed as long as it is the first pressing surface S1.

In the above-described embodiment, the second bag portion 30 is formed by bonding the third sheet material 33 to the first sheet material 21 constituting the first pressing surface S1 at a position covering the hole portion 25. It was decided to be done. However, the present invention is not limited to this, and the method of forming the second bag portion 30 may be arbitrarily changed, for example, by fixing the bag-like member at a position covering the hole 25. And if it is smaller than the 1st bag part 20, you may change arbitrarily also about the magnitude | size and shape. However, from the viewpoint of suppressing the volume change due to the expansion / contraction, the second bag portion 30 is desirably as small as possible.

Furthermore, in the above embodiment, when the second bag portion 30 is formed by bonding the third sheet material 33 to the first pressing surface S1, the first pressing surface S1 and the third sheet material 33 are formed. The tip 11a of the air tube 11 is sandwiched between the two. However, the present invention is not limited to this, and the connection hole 31 provided in the second bag portion 30 in advance is used as long as the distal end portion 11a of the air tube 11 arranged along the first pressing surface S1 is connected. On the other hand, the connection method may be arbitrarily changed, such as inserting the tip 11a of the air tube 11.

Moreover, the shape of the 3rd sheet | seat material 33 in the state before bonding on 1st press surface S1 may be a flat shape, and as shown in FIG. 7, the connection hole 31 and 1st The three-dimensional shape (cross-sectional U-shape) of the communication portion 32 that forms a gap between the hole portion 25 of the pressing surface S1 and the tip portion 11a of the air tube 11 connected to the connection hole 31 is formed in advance. There may be.

In particular, by using the third sheet material 33 in which the three-dimensional shape of the communication portion 32 is previously formed, the hole formed in the first pressing surface S1 even after the air is discharged from the air bag 10. 25 and the gap between the tip 11a of the air tube 11 connected to the connection hole 31 can be maintained.

That is, as shown in FIG. 10, when the second bag part 30 is crushed by exhaust, the third sheet material 33 constituting the second bag part 30 sticks to the first pressing surface S1. there is a possibility. And thereby, there exists a possibility that the hole 25 provided in the 1st press surface S1 may be block | closed. However, according to the above configuration, occurrence of such a situation can be avoided.

Note that, for example, when the second bag portion 30 is formed by other methods such as fixing a bag-like member to the first pressing surface S1, the hole portion 25 and the air tube are also in the exhaust state as described above. It is good to set it as the structure by which the communication part 32 which forms a clearance gap between 11 front-end | tip parts 11a is maintained. This prevents the situation in which the hole 25 connecting the first bag portion 20 and the second bag portion 30 is closed by exhaust, and smoothly expands the first bag portion 20. Can do.

-Moreover, it protrudes so that the hole 25 which connects the 1st bag part 20B and the 2nd bag part 30 may be enclosed like the air bag 10B shown to Fig.11 (a) and FIG.11 (b). A plurality of protrusions 35 may be provided on the first pressing surface S1. Specifically, in this example, each of the protrusions 35 has an arc-shaped protrusion shape that surrounds the hole 25 in an annular shape with a space between each other. That is, by adopting such a configuration, when the second bag portion 30 is crushed by exhaust, the third sheet material 33 attached to the first pressing surface S1 closes the hole portion 25. It can be avoided. Further, the air path is secured by the gap between the protrusions 35. And thereby, the 1st bag part 20 can be expanded smoothly.

It should be noted that the number and shape of the protrusions 35 surrounding the hole 25 may be arbitrarily changed. Further, such a protrusion 35 may be provided on the third sheet material 33 constituting the second bag portion 30. And you may apply to the structure which forms the 2nd bag part 30 by other methods, such as adhering a bag-shaped member to 1st press surface S1, for example.

In the embodiment described above, the groove portion 24 extending in the longitudinal direction of the first bag portion 20 is formed on the support surface 23s of the base member 23 on which the air bag 10 is placed. The air tube 11 is arranged in the groove 24. However, the present invention is not limited to this, and the extending direction of the groove portion 24 is not limited to this, as long as the distal end portion 11a of the air tube 11 connected to the second bag portion 30 is arranged along the first pressing surface S1. May be arbitrarily changed. Further, the depth of the groove 24 may be arbitrarily changed. And the structure which does not have such a groove part 24 is not excluded.

In the above embodiment, the armrest 3 as an occupant support device is embodied in a configuration provided on the inner panel 2 of the vehicle door 1. However, the present invention is not limited to this. For example, as shown in FIG. 12, the air bag 10 C may be embodied in the armrest 3 C provided in the center console 41. Specifically, the air bag 10C is provided inside an elbow rest portion 4C on which an arm portion (not shown) of an occupant seated on the seat 42 on the side of the armrest 3C is placed. As a result, the elbow rest portion 4C as a contact portion with respect to the occupant is displaced.

Further, for example, on the side surface of the center console 41 or the inner panel 2 of the vehicle door 1 or the like, a “knee pad portion” where the knee portion of an occupant seated on the seat 42 abuts is provided. Furthermore, while providing a base member inside the knee pad as this contact part, the air bag 10 is arrange | positioned between this base member and a knee pad. And it is good also as a structure which displaces the knee pad part by expanding and contracting this air bag 10. As shown in FIG. In addition, such a contact part may contact | abut leg parts other than a knee. Thus, the occupant seated on the seat can be supported in a more stable posture.

Further, for example, as shown in FIG. 13, a base member 23D is provided below the lower wall portion 43a of the console box 43, and the air bag 10D is disposed between the base member 23D and the lower wall portion 43a. And the volume variable apparatus 45 which changes the volume of the console box 43 may be formed by the lower wall part 43a moving to an up-down direction based on expansion / contraction of this air bag 10D.

According to the above configuration, the volume of the console box 43 can be freely changed in accordance with the size of the object accommodated in the console box 43. As a result, the contents in the console box 43 can be stably held.

Further, the side wall portion 43b of the console box 43 may be displaced laterally by the expansion / contraction of the air bag 10D. And such a volume variable apparatus 45 may be applied to other accommodation spaces provided in the passenger compartment, such as a door pocket 46 (see FIG. 1) provided in the inner panel 2 of the vehicle door 1, for example. .

Claims

A first bag portion having first and second pressing surfaces facing in opposite directions;
A second bag portion that is smaller than the first bag portion and communicates with the first bag portion through a hole provided in the first pressing surface, and is along the first pressing surface. An air bag comprising: the second bag portion to which a tip portion of an air tube arranged in this manner is connected.
The air bag according to claim 1,
The second bag portion is an air bag including a sheet material bonded to the first pressing surface at a position covering the hole portion.
In the air bag according to claim 1 or 2,
The first bag portion is an air bag including two sheet members bonded to each other.
The air bag according to claim 3,
The hole is an air bag provided in a central portion of the first pressing surface.
A contact portion for an occupant seated in a vehicle seat;
A base member provided inside the contact portion;
The air bag according to any one of claims 1 to 4, wherein the air bag is disposed between the contact portion and the base member, and the contact portion is displaced by expansion and contraction of the air bag. Configured as described above, and
An occupant support device.
The occupant support device according to claim 5,
The said contact part is a passenger | crew support apparatus which is an elbow rest part of the armrest by which the said passenger | crew's arm part is mounted.
A wall portion of a storage space provided in the passenger compartment;
A base member provided inside the wall,
The air bag according to any one of claims 1 to 4, wherein the air bag is disposed between the wall portion and the base member, and the wall portion is displaced based on expansion and contraction of the air bag. The air bag is configured to change the volume of the storage space by:
A variable volume device comprising: