Mobile seat

Abstract

To provide a sheet for mobile devices that can reduce weight while increasing the rigidity of the support structure. [Solution] The mobile sheet S comprises a cushion support 10 made of a first foam and a cushion pad material 20 made of a second foam that is softer than the first foam and laminated on the cushion support 10. A long groove 14 is formed on the surface of the cushion support 10 opposite to the laminated surface on which the cushion pad material 20 is laminated. The groove 14 extends in a direction intersecting the sheet width direction when viewed from the laminated direction on which the cushion pad material 20 is laminated on the cushion support 10. The bottom surface 15 of the groove 14 extends parallel to the laminated surface when viewed from the sheet width direction.

Description

Technical Field

[0001] The present invention relates to a seat for a moving body, and particularly to a seat for a moving body including a support and a padding material.

Background Art

[0002] Conventionally, there is known a seat for a moving body, such as an aircraft or a vehicle, which supports a seated person by a cushion made of a foam. For example, in the seat for a moving body described in Patent Document 1, a seat cushion detachable from a support structure of an aircraft is disclosed. The seat cushion is configured by laminating an upper layer (corresponding to the padding material) made of a honeycomb core panel on a base layer (corresponding to the support) made of a foam material, and covering the base layer and the upper layer with a skin material.

[0003] Also, for example, in the vehicle seat described in Patent Document 2, a seat cushion detachable from a vehicle body floor is disclosed. The seat cushion is configured by laminating a first pad member (corresponding to the padding material) made of a foamed resin on a second pad member (corresponding to the support) made of a foamed propylene, and covering the second pad member and the first pad member with a skin.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In recent years, eVTOLs (Electric Vertical Take-Off and Landing aircraft) have attracted considerable attention, and development of eVTOLs capable of carrying seated passengers is progressing. Mobile aircraft like eVTOLs tend to have a high proportion of passenger weight relative to the aircraft's weight. Therefore, from the perspective of aircraft control, there has been a need for mobile aircraft seats that support the passenger to be as lightweight as possible.

[0006] In mobile seats such as those described in Patent Documents 1 and 2, the support for the occupant was increased by using a two-layer structure for the support and padding material. However, the volume of the support was large, resulting in a heavy mobile seat. Furthermore, simply reducing the volume of the support could lead to a decrease in the rigidity of the support.

[0007] The present invention has been made in view of the above problems, and the object of the present invention is to provide a sheet for a mobile body that can increase the rigidity of the support while reducing the weight. [Means for solving the problem]

[0008] The aforementioned problem is solved by providing a sheet for a mobile body, comprising a support made of a first foam, and a pad material made of a second foam that is softer than the first foam and laminated on the support, wherein a long groove is formed on the surface of the support opposite to the laminated surface on which the pad material is laminated, the groove extends in a direction intersecting the sheet width direction when viewed from the lamination direction on which the pad material is laminated on the support, and the bottom surface of the groove extends parallel to the laminated surface when viewed from the sheet width direction.

[0009] With the above configuration, the groove bottom extends parallel to the laminated surface of the support, resulting in a nearly uniform thickness of the support. Therefore, the occurrence of stress concentration in the support can be suppressed. Therefore, it is possible to reduce the weight of the mobile unit's sheet while increasing the rigidity of the support structure.

[0010] In this case, the seat for the mobile body has a seat cushion for supporting the buttocks of the occupant, the seat cushion has a support and a pad material, the groove has a central groove formed in the center in the width direction of the seat and lateral grooves provided at positions spaced apart from the central groove in the width direction of the seat, in a side view of the seat, the bottom surface of the central groove and the bottom surface of the lateral groove each have a vertex, and it is preferable that the vertex on the bottom surface of the central groove is higher than the vertex on the bottom surface of the lateral groove. With the above configuration, the central groove, which receives relatively little load, is made larger to reduce weight, while the lateral grooves, which receive relatively more load, are made smaller, thereby ensuring the rigidity of the support structure.

[0011] In this case, when viewed from the side of the sheet, the apex of the groove bottom of the lateral groove is preferably located behind the apex of the groove bottom of the central groove. With the above configuration, the apex of the lateral groove is located towards the rear, which allows for optimal support of the occupant's legs.

[0012] In this case, a connecting member for attachment to a connected member provided on the floor surface of the mobile body is provided on the lower surface of the support, and in a view of the underside of the sheet, the connecting member is preferably positioned between the central groove and the lateral groove in the width direction of the sheet. With the above configuration, the connecting members are placed in positions that are prone to bending (between the grooves), so the design intersection of the connecting members can be absorbed by the bending of the grooves.

[0013] In this case, when viewed from below the seat, the connecting member is preferably positioned between the front end of the central groove and the front end of the lateral groove. With the above configuration, the connecting member is positioned in a location that is less prone to bending between the grooves (between the front ends of the grooves), thereby increasing the rigidity of the support. [Effects of the Invention]

[0014] According to the present invention, it is possible to increase the rigidity of the support while reducing its weight. Moreover, according to the present invention, the rigidity of the support can be ensured. Moreover, according to the present invention, the legs of the seated person can be suitably supported. Moreover, according to the present invention, the design intersections of the connecting members can be absorbed by the deflection of the concave grooves. Moreover, according to the present invention, the rigidity of the support can be increased.

Brief Description of the Drawings

[0015] [Figure 1] It is a perspective view of the seat for a moving body of the first embodiment. [Figure 2] It is a side view of the seat for a moving body, showing the state of being arranged on the moving body. [Figure 3] It is a rear view of the seat for a moving body. [Figure 4] It is a perspective view of the seat for a moving body, showing the state where the skin material is removed. [Figure 5] It is an exploded perspective view of the support and the pad material. [Figure 6] It is a side view of the support. [[ID=3l]] [Figure 7] It is a bottom view of the support. [Figure 8] It is a top view of the support. [Figure 9] It is a cross-sectional view taken along line IX-IX of FIG. 7. [Figure 10] It is a cross-sectional view taken along line X-X of FIG. 7. [Figure 11] It is a side view of the pad material. [Figure 12] It is a bottom view of the pad material. [Figure 13] It is a top view of the pad material. <00?00101> [Figure 14] It is a bottom view of the pad material, showing the state where the skin material is attached. [Figure 15] It is an explanatory view of the suspension structure. <? [Figure 16] It is a rear view of the support. [Figure 17] It is a front view of the support. [Figure 18] It is a rear view of the pad material. [Figure 19] This is a front view of the pad material. [Figure 20] This is a close-up view of a portion of the pad material. [Figure 21] This is a rear view of the pad material, showing the state with the outer covering material attached. [Figure 22] This is a rear view of the support of the second embodiment. [Figure 23] This is a cross-sectional view of line XXIII-XXIII in Figure 22. [Figure 24] This is a side view of the seat for a mobile body according to the third embodiment. [Figure 25] This is a side view of the seat for a mobile body according to the fourth embodiment. [Figure 26] This is a side view of the seat for a mobile body according to the fifth embodiment. [Figure 27] This is a side view of the seat for a mobile body according to the sixth embodiment. [Figure 28] This is a perspective view of the support for the mobile sheet of the seventh embodiment. [Modes for carrying out the invention]

[0016] Hereinafter, embodiments of the present invention will be described with reference to Figures 1 to 28. In the following explanation, "forward-backward direction" refers to the forward-backward direction of the seat for the mobile vehicle, which coincides with the direction of travel when the mobile vehicle is flying or traveling. "Seat width direction" refers to the width direction of the seat for the mobile vehicle, which coincides with the left-right direction as viewed from the perspective of a person seated in the seat. "Up-down direction" refers to the up-down direction of the seat for the mobile vehicle, which coincides with the vertical direction when the mobile vehicle is flying or traveling on a horizontal plane.

[0017] <First Embodiment> The mobile seat S of the first embodiment will be described with reference to Figures 1 to 21. As shown in Figure 1, the mobile seat S is a seat that is placed inside a mobile vehicle, such as an aircraft, to support a occupant. The mobile seat S may also be placed in mobile vehicles other than aircraft, such as a vehicle. As shown in Figure 2, the mobile sheet S can be directly attached to the floor F or wall W of the mobile body without, for example, using a steel sheet frame. Since the mobile sheet S is mainly composed of foam, it can be made lighter compared to using a steel sheet frame.

[0018] As shown in Figure 1, the mobile seat S comprises a seat cushion 1 that supports the seated person's buttocks and a seat back 2 that supports the seated person's back and head. As shown in Figure 2, the mobile seat S has separate seat cushion 1 and seat back 2, which are attached to the floor surface F and wall surface W (e.g., made of aluminum) of the mobile body, respectively. Specifically, seat cushion 1 is detachably attached to the floor surface F. Seat back 2 is detachably attached to the rear wall surface. Note that seat cushion 1 and seat back 2 are not limited to separate shapes, but may be integrated shapes. Also, the attachment positions of seat cushion 1 and seat back 2 to the mobile body are not limited to the floor surface F and rear wall surface, but may also be the ceiling surface or wall surface W such as the inner surface.

[0019] As shown in Figure 1, the seat cushion 1 is a seating portion for supporting the buttocks of a sitter from below, and comprises a cushion support 10 made of a first foam, a cushion pad material 20 made of a second foam that is softer than the first foam and laminated on the cushion support 10, and a cushion surface material 30 that covers the cushion pad material 20. As shown in Figure 2, the cushion support 10 is detachably attached to the floor surface F of the moving body, for example, by metal pins. The cushion pad material 20 is detachably engaged with the cushion support 10, for example, by hook-and-loop fasteners (loop portion and hook portion). The cushion surface material 30 is detachably locked to the cushion pad material 20, for example, by hook-and-loop fasteners. Note that a portion of the cushion pad material 20 may be detachably attached to the floor surface F.

[0020] As shown in Figure 3, the bottom surface of the seat cushion 1 is provided with a member for detachably attaching it to the floor surface F of the mobile body. Specifically, the lower surface 10b of the cushion support 10 is provided with a floor connection member 13, which will be described later. The cushion support 10 is detachably attached to the floor surface F of the mobile body by the floor connection member 13. The cushion support 10 can be detachably attached directly to the floor surface F of the moving body, but it may also be attached via an attachment. In this case, the attachment should preferably be made of a relatively lightweight material.

[0021] The cushion surface material 30 covers the surface 20a of the cushion pad material 20 and extends to the back surface 20b of the cushion pad material 20. The ends of the cushion surface material 30 are engaged with the back surface 20b of the cushion pad material 20, and the cushion pad material 20 is laminated onto the cushion support 10 from above. In other words, in the lamination direction (specifically the vertical direction) in which the cushion pad material 20 is laminated onto the cushion support 10, the cushion surface material 30 is positioned between the cushion support 10 and the cushion pad material 20. This allows the cushion pad material 20 to be easily attached to and detached from the cushion support 10 while the cushion surface material 30 is still attached.

[0022] Thus, since the seat cushion 1 is mainly composed of a cushion support 10 made of a first foam and a cushion pad material 20 made of a second foam, the overall weight of the seat for the mobile vehicle can be reduced. In particular, since the cushion support 10 of the seat cushion 1 is placed directly on the floor surface F of the mobile vehicle without the use of metal members or the like, the seat can be made even lighter compared to when a steel seat frame is used. Furthermore, since the cushion pad material 20 can be detachably attached to the cushion support 10, maintainability, assembly, and customization can be improved.

[0023] The seat back 2 is a backrest and headrest portion for supporting the back and head of the seated person from the rear, and comprises a back support 40 made of a first foam, a back pad material 50 made of a second foam that is softer than the first foam and laminated on the back support 40, and a back surface material 60 covering the back pad material 50. As shown in Figure 2, the back support 40 is detachably attached to the wall surface W of the moving body, for example, by metal pins. The back pad material 50 is detachably attached to the back support 40 and the wall surface W, for example, by hook-and-loop fasteners. The back surface material 60 is detachably attached to the back pad material 50, for example, by hook-and-loop fasteners.

[0024] As shown in Figure 3, the back of the seat back 2 is provided with a member for detachably attaching it to the wall surface W of the mobile body. Specifically, the rear surface 40b of the back support 40 is provided with a wall connection member 43, which will be described later. In addition, the back surface 50b of the back pad material 50 is provided with a mounting member 55, which will be described later. The back support 40 is detachably attached to the wall surface W of the mobile body by the wall connection member 43. A portion of the back pad material 50 is detachably attached to the wall surface W of the mobile body by the mounting member 55. The back support 40 can be detachably attached directly to the floor surface F of the moving body, but it may also be attached via an attachment. In this case, the attachment should preferably be made of a relatively lightweight material.

[0025] As shown in Figure 2, the back surface material 60 covers the surface 50a of the back pad material 50 and extends to the back surface 50b of the back pad material 50. The end of the back surface material 60 is engaged with the back surface 50b of the back pad material 50, and the back pad material 50 is laminated onto the back support 40 from the front. In other words, in the lamination direction (specifically the front-to-back direction) in which the back pad material 50 is laminated onto the back support 40, the back surface material 60 is positioned between the back support 40 and the back pad material 50. This allows the back pad material 50 to be easily attached to and detached from the back support 40 while the back surface material 60 is still attached.

[0026] Thus, since the seat back 2 is mainly composed of a back support 40 made of a first foam and a back pad material 50 made of a second foam, the overall weight of the seat for the mobile vehicle can be reduced. In particular, since the back support 40 of the seat back 2 is placed directly on the wall surface W of the mobile vehicle without the use of metal members or the like, the seat can be made even lighter compared to when a steel seat frame is used. Furthermore, since the back pad material 50 can be detachably attached to the back support 40, maintainability, assembly, and customization can be improved. In particular, since the back pad material 50 can be detachably attached to both the back support 40 and the wall surface W of the mobile body, the back pad material 50 can be easily attached to and detached from both the back support 40 and the wall surface W of the mobile body.

[0027] <<Seat Cushion Detailed Composition>> Here, we will describe each component of the seat cushion 1. Figure 4 shows the state after the cushion surface material 30 has been removed from the cushion pad material 20. The seat cushion 1 has a two-layer structure in which a cushion support 10 made of a first foam and a cushion pad material 20 made of a second foam are laminated together. Note that it may be three or more layers, not just two, and the hardness of each layer can be set as appropriate. As shown in Figure 5, the cushion pad material 20 can be removed from the cushion support 10.

[0028] The cushion support 10 is a rigid foam made, for example, from expanded polypropylene (EPP), and supports the buttocks and thighs of the seated person. As shown in Figure 2, the upper surface 10a of the cushion support 10 is a lamination surface for laminating the cushion pad material 20. The lower surface 10b of the cushion support 10 is a mounting surface for attaching it to the floor surface F of the mobile body. The lower surface 10b is a flat surface and is attached to a flat floor surface F. As shown in Figure 6, the cushion support 10 includes a cushion support body 11 that supports the seated person from below, and a cushion engagement member 12 for engaging with the cushion pad material 20. Furthermore, as shown in Figures 2 and 7, the lower surface 10b of the cushion support 10 is provided with a floor connection member 13 for attachment to a floor connection member Fa provided on the floor surface F of the mobile body, and a groove 14 that is elongated in the front-rear direction. The cushion engagement member 12 and the floor connection member 13 are fixed to the cushion support 10, for example, with adhesive. Note that the cushion engagement member 12 and the floor connection member 13 may be embedded by insert molding during the foam molding of the cushion support 10.

[0029] As shown in Figures 5 and 8, the cushion support body 11 has a central portion 11a that supports the buttocks and thighs of the seated person, a raised portion 11b provided on both sides of the central portion 11a in the seat width direction, a pad housing portion 11c for housing the floor connecting member 13, a front portion 11d provided in front of the central portion 11a, a rear portion 11e provided behind the central portion 11a, and a stepped portion 11f that protrudes upward from the rear portion 11e and forms a step. In other words, the pad housing portion 11c for housing the floor connecting member 13 is formed in the front portion 11d and the rear portion 11e.

[0030] As shown in Figure 8, the central portion 11a has a roughly square shape when viewed from above. Also, as shown in Figure 6, the central portion 11a slopes gently upward from the rear to the front when viewed from the side. As shown in Figures 6 and 8, the embankment portion 11b is a part that bulges upward to support the seated person's buttocks and thighs from the sides.

[0031] As shown in Figure 6, the pad housing section 11c is a circular hole that penetrates in the loading direction (i.e., vertical direction) and houses the floor connecting member 13 inside. The diameter of the hole in the pad housing section 11c is progressively larger on the upper surface 10a side than on the lower surface 10b side, and the floor connecting member 13 is fixed to the smaller diameter section. As shown in Figure 8, two pad housing sections 11c are formed in the front section 11d and two in the rear section 11e. By forming a pad housing portion 11c that penetrates vertically through the cushion support body 11, the seat cushion 1 can be made even lighter.

[0032] The front section 11d is located in front of the central section 11a and has a wide area that extends in the width direction of the sheet. As shown in Figure 6, the front section 11d slopes gently downward from rear to front in a side view. As shown in Figure 8, the rear section 11e is located behind the central section 11a and has a narrower section than the wider section. The cushion support body 11 has a shape that widens towards the front and is formed smoothly and continuously from the wide section to the narrow section. The embankment section 11b is formed in the central section 11a and the front section 11d (i.e., the wide section), but not in the rear section 11e (i.e., the narrow section).

[0033] As shown in Figure 6, the stepped portion 11f is positioned behind the rear portion 11e and protrudes upward. By forming the stepped portion 11f at the rear end of the cushion support body 11, it is possible to suppress the displacement of the cushion pad material 20 in the front-rear direction when the cushion pad material 20 is laminated. Furthermore, the central portion 11a and the front portion 11d have a mountain-like shape in a side view so as to correspond to the thighs of the seated person.

[0034] As shown in Figure 8, the cushion engagement member 12 is, for example, a hook-and-loop fastener (loop portion) and is a member for which the cushion engagement member 22 of the cushion pad material 20 engages. The cushion engagement member 12 has a central engagement portion 12a provided in the central portion 11a and a front engagement portion 12b provided in the front portion 11d. Note that the hook-and-loop fastener may also be a hook portion. The central engaging portions 12a extend elongated in the front-rear direction and are arranged in four parallel positions spaced apart in the seat width direction. The front engaging portions 12b extend elongated in the seat width direction and are arranged with one between the pad housing portions 11c and two outside the pad housing portions 11c. The two front engaging portions 12b located outside the pad housing portions 11c are inclined with respect to the seat width direction. Furthermore, as shown in Figure 8, the two central engaging portions 12a located on the central side in the seat width direction of the cushion engaging member 12 are positioned between the three grooves 14 in the seat width direction. In other words, the two central engaging portions 12a located on the central side are positioned so as not to overlap with the grooves 14 in the vertical direction.

[0035] As shown in Figure 2, the floor connecting member 13 is a member for attachment to the floor surface F of the mobile body, and is a cylindrical member that is detachably fitted to, for example, a floor connecting member Fa (specifically, a metal pin) formed on the floor surface F. More specifically, the floor connecting member 13 is fixed inside the pad housing 11c and is detachably attached to the floor connecting member Fa of the mobile body. Because the cushion support 10 can be detachably attached to the floor surface F of the mobile body by the floor connecting member 13, maintainability, ease of assembly, and customizability can be improved. The floor connecting member 13 has two front connecting portions 13a positioned on the front side of the lower surface 10b, and two rear connecting portions 13b positioned on the rear side of the lower surface 10b. The front connecting portions 13a are positioned between the grooves 14 in the sheet width direction. The rear connecting portions 13b are positioned between the grooves 14 in the sheet width direction (i.e., in a position aligned with the front connecting portions 13a in the front-rear direction).

[0036] As shown in Figure 7, the groove 14 is a long groove formed on the side of the cushion support 10 opposite to the laminated surface (i.e., the top surface 10a) where the cushion pad material 20 is laminated (i.e., the bottom surface 10b). In other words, the groove 14 is a space for reducing the weight of the cushion support 10. The groove 14 is a space formed during foam molding, but it may also be formed by hollowing it out after foam molding, or by other methods. The groove 14 extends linearly in a direction intersecting the sheet width direction (i.e., the front-to-back direction) when viewed from the stacking direction (i.e., the vertical direction) in which the cushion pad material 20 is stacked on the cushion support 10. The groove 14 has a central groove 14a formed in the central part in the sheet width direction, and two lateral grooves 14b provided at positions spaced apart from the central groove 14a in the sheet width direction.

[0037] As described above, the presence of multiple grooves 14 makes it possible to reduce the weight of the seat cushion 1. Furthermore, since the grooves 14 are positioned along the thighs of the seated person, it is possible to increase the rigidity of the cushion support 10 while reducing the weight.

[0038] Furthermore, in a view from the underside of the seat, the floor connecting member 13 is positioned between the central groove 14a and the lateral grooves 14b in the width direction of the seat. Specifically, in a view from the underside of the seat, the front connecting portion 13a of the floor connecting member 13 is positioned between the front end of the central groove 14a and the front end of the lateral grooves 14b. The rear connecting portion 13b of the floor connecting member 13 is positioned on the rear portion 11e of the cushion support body 11 and is provided in a position that does not overlap the grooves 14 in the width direction of the seat. In this way, since the floor connecting member 13 is provided in a position that is prone to bending (between the grooves 14), the design intersection of the floor connecting member 13 can be absorbed by the bending of the grooves 14. Furthermore, since the floor connecting member 13 is positioned in a position that is less prone to bending (between the front ends of the grooves 14) within the grooves 14, the rigidity of the cushion support body 11 can be increased.

[0039] As shown in Figures 9 and 10, the groove 14 has a concave shape that is recessed upward from the lower surface 10b and has a flat groove bottom surface 15. When viewed from the sheet width direction, the groove bottom surface 15 of the groove 14 extends parallel to the laminated surface. In other words, corresponding to the mountain shape of the laminated surface (i.e., the upper surface 10a of the cushion support 10), the groove bottom surface 15 has an upward sloping surface 15a that slopes upward as it moves forward and a downward sloping surface 15b that slopes downward as it moves forward. That is, in a side view of the sheet, the groove bottom surface 15 of the central groove 14a and the groove bottom surface 15 of the lateral grooves 14b each have an apex 16. Thus, since the groove bottom surface 15 extends parallel to the laminated surface of the cushion support 10, the thickness of the portion where the groove 14 is formed on the upper surface 10a side of the cushion support body 11 becomes substantially uniform. Therefore, the occurrence of stress concentration in the cushion support 10 can be suppressed.

[0040] The vertex 16 at the bottom surface 15 of the central groove 14a is higher than the vertex 16 at the bottom surface 15 of the lateral groove 14b. In other words, the length L1 from the bottom surface 10b to the vertex 16 of the central groove 14a is longer than the length L2 from the bottom surface 10b to the vertex 16 of the lateral groove 14b. Furthermore, in a side view of the seat, the apex 16 at the bottom surface 15 of the lateral groove 14b is located further back than the apex 16 at the bottom surface 15 of the central groove 14a. In other words, as shown in Figure 7, the length L3 from the rear end of the cushion support body 11 to the apex 16 of the central groove 14a is longer than the length L4 from the rear end of the cushion support body 11 to the apex 16 of the lateral groove 14b.

[0041] As shown in Figures 9 and 10, the position of the vertex 16 differs depending on the position of the groove 14, with the central groove 14a being larger than the lateral groove 14b. In other words, the thickness of the portion where the lateral groove 14b is formed on the upper surface 10a side of the cushion support body 11 is thicker than the thickness of the portion where the central groove 14a is formed. Therefore, by making the central groove 14a, which is not subjected to a relatively large load, larger to reduce weight, while making the lateral grooves 14b, which are subjected to a relatively large load, smaller, the rigidity of the cushion support 10 can be ensured. In addition, since the apex 16 of the lateral groove 14b is located towards the rear, the legs of the seated person can be suitably supported.

[0042] The cushion pad material 20 is a soft foam formed from a foamed resin such as urethane foam, and supports the buttocks and thighs of the sitter. The cushion pad material 20 is softer and less hard than the cushion support 10. Therefore, the support force of the seat cushion 1 can be increased by the rigid cushion support 10, while the seating feel can be improved by the flexible cushion pad material 20. The cushion pad material 20 may also be harder than the cushion support 10.

[0043] As shown in Figure 4, the surface 20a of the cushion pad material 20 is the seating surface on which the sitter sits. The surface 20a of the cushion pad material 20 has a suspension groove 20c for suspending the cushion surface material 30 and a seam relief groove 20d for accommodating the seams of the cushion surface material 30. As shown in Figure 2, the back surface 20b of the cushion pad material 20 is an opposing surface that faces the laminated surface of the cushion support 10. The back surface 20b has a shape that corresponds to the laminated surface and is a smooth surface.

[0044] As shown in Figures 11 and 12, the cushion pad material 20 includes a cushion pad body 21 that supports the occupant from below, a cushion engaging member 22 that detachably engages with the cushion support 10, a cushion locking member 23 that detachably locks with the cushion surface material 30, and a suspension member 24 for suspending the cushion surface material 30. The cushion engaging member 22 and the cushion locking member 23 are provided on the back surface 20b of the cushion pad material 20. The suspension member 24 is provided inside the suspension groove 20c on the front surface 20a side of the cushion pad material 20. The cushion engaging member 22, the cushion locking member 23, and the suspension member 24 are each fixed to the cushion pad material 20, for example, with an adhesive. The cushion engaging member 22, the cushion locking member 23, and the suspension member 24 may also be embedded by insert molding during the foam molding of the cushion pad material 20.

[0045] The cushion engagement member 22 and the cushion locking member 23 are provided only on the back surface 20b of the cushion pad material 20. That is, the cushion surface material 30 engages only with the suspension member 24 on its surface 20a. Thus, since the cushion engagement member 22 and the cushion locking member 23 are not provided on the surface 20a of the cushion pad material 20, it is possible to suppress the occurrence of wrinkles in the cushion surface material 30 on the surface 20a side of the cushion pad material 20. In addition, since the cushion surface material 30 is arranged flat, the unevenness of the cushion surface material 30 can be suppressed.

[0046] As shown in Figure 5, the cushion pad body 21 includes a support portion 21a that supports the buttocks and thighs of the seated person, pad ridge portions 21b provided on both sides of the support portion 21a in the seat width direction, a pad step portion 21c that is formed to be thinner along the contour of the cushion pad material 20, a front side portion 21d provided in front of the support portion 21a, a rear side portion 21e provided behind the support portion 21a, and a protruding portion 21f that protrudes rearward from the rear side portion 21e, corresponding to the shape of the rear portion 11e and step portion 11f of the cushion support 10.

[0047] As shown in Figure 13, the support portion 21a has a roughly square shape when viewed from above. Also, as shown in Figure 11, the support portion 21a slopes gently upward from the rear to the front when viewed from the side. The padded ridge portion 21b is a part that bulges upward to support the seated person's buttocks and thighs from the sides.

[0048] As shown in Figure 11, the pad step portion 21c is a recessed portion extending upward from the back surface 20b of the cushion pad material 20. As shown in Figure 12, the pad step portion 21c is formed along the contour of the cushion pad material 20. Multiple cushion locking members 23 are arranged on the pad step portion 21c. The pad step portion 21c is thinner by the thickness of the cushion locking member 23 and the cushion surface material 30. Therefore, when the cushion surface material 30 is locked to the cushion pad material 20, the cushion surface material 30 and the back surface 20b become flush, and the surface facing the laminated surface can be made flat.

[0049] As shown in Figure 13, the front portion 21d is located in front of the support portion 21a and has a wide area that is wide in the sheet width direction. As shown in Figure 11, the front portion 21d slopes gently downward from rear to front in a side view. As shown in Figure 13, the rear portion 21e is located behind the support portion 21a and has a narrower width than the wider portion. The cushion pad body 21 has a shape that widens towards the front and is formed smoothly and continuously from the wide portion to the narrow portion. The pad ridge portion 21b is formed on the support portion 21a and the front portion 21d (i.e., the wide portion), but not on the rear portion 21e (i.e., the narrow portion).

[0050] As shown in Figure 11, the protruding portion 21f is positioned behind the rear portion 21e and protrudes to the rear. By forming the protruding portion 21f at the rear end of the cushion pad body 21, as shown in Figure 2, it is possible to suppress the displacement of the cushion pad material 20 in the front-rear direction when the protruding portion 21f is laminated on the stepped portion 11f of the cushion support 10. Furthermore, the support portion 21a and the front portion 21d have a mountain-like shape in a side view so as to correspond to the thighs of the seated person.

[0051] As shown in Figure 12, the cushion engaging member 22 is, for example, a hook fastener (hook portion) and is a member for engaging with the cushion engaging member 12 of the cushion support 10. The cushion engaging member 22 has a central engaging portion 22a provided on the support portion 21a and a front engaging portion 22b provided on the front portion 21d. Note that the hook fastener may also be a loop portion. The central engaging portion 22a extends lengthwise in the front-to-back direction, and four of them are arranged parallel to each other and spaced apart in the sheet width direction. The outer central engaging portion 22a is positioned along the outer shape of the cushion pad material 20 and extends lengthwise in the front-to-back direction longer than the inner central engaging portion 22a. In other words, the inner central engaging portion 22a is shorter than the outer central engaging portion 22a. By using these lengthwise hook-and-loop fasteners, misalignment and wrinkle formation can be suppressed more effectively than by increasing the number of hook-and-loop fasteners. Furthermore, using lengthwise hook-and-loop fasteners can reduce the feeling of unevenness. The front engaging portion 22b extends elongated in the seat width direction, with one positioned in the center of the pad step portion 21c and two positioned on the outside in the seat width direction. The two front engaging portions 22b positioned on the outside of the pad step portion 21c are inclined with respect to the seat width direction.

[0052] As shown in Figure 12, the cushion locking member 23 is, for example, a hook-and-loop fastener (loop portion) and is a member for locking onto the cushion locking member 32 of the cushion surface material 30. Multiple cushion locking members 23 are arranged on the pad step portion 21c along the contour of the cushion pad material 20. Note that the hook-and-loop fastener may also be a hook portion. When viewed from the stacking direction (i.e., from a bottom view), the cushion engaging member 22 is positioned inside the cushion locking member 23. Also, when viewed from the stacking direction, the cushion locking member 23 is positioned closer to the contour of the cushion pad material 20 than the cushion engaging member 22.

[0053] Thus, the cushion locking member 23 is positioned near the contour, and the cushion engaging member 22 is positioned inside the cushion locking member 23. As shown in Figure 14, since the cushion locking member 23 is covered by the cushion surface material 30, it is possible to prevent the cushion engaging member 22, which is inside the cushion locking member 23, from coming into contact with the worker's hand when the worker grips the cushion pad material 20.

[0054] Furthermore, a cushion locking member 23 is provided in the straight portion 20e of the cushion pad material 20 where the contour extends in a straight line. Only one cushion locking member 23 (specifically, a straight locking portion 23a) is provided corresponding to the straight portion 20e. In other words, one straight portion 20e is provided with only one long straight locking portion 23a corresponding to that straight portion 20e, and the straight locking portion 23a is not divided. Thus, since there is only one cushion locking member 23 positioned corresponding to the straight section 20e, the occurrence of wrinkles in the cushion surface material 30 can be suppressed. In addition, since the cushion surface material 30 is positioned flat, the unevenness of the cushion surface material 30 can be suppressed.

[0055] The number and position of the cushion locking members 23 are not limited to those shown. In this embodiment, the cushion locking members 23 provided on the curved portion of the contour of the cushion pad material 20 consist of a plurality of straight-shaped cushion locking members 23. However, for example, the cushion locking members 23 may have a curved shape corresponding to the curved portion. Also, a straight-line locking portion 23a may be divided and arranged for a single straight portion 20e.

[0056] As shown in Figure 13, the suspension member 24 is, for example, a hook-and-loop fastener (loop portion) and is a member for engaging with the surface suspension member 33 of the cushion surface material 30. Multiple suspension members 24 are arranged inside the suspension groove 20c of the cushion pad material 20. Note that the suspension members 24 are not placed at the intersections or curved parts of the suspension groove 20c. Therefore, the configuration makes it easy to suspend the cushion surface material 30. As shown in Figures 13 and 14, in a view from below, a portion of the cushion engaging member 22 is positioned to intersect with the suspension groove 20c. As shown in Figure 15, the surface suspension member 33 of the cushion surface material 30 is suspended from the suspension member 24. Note that the suspension structure is not limited to the hook-and-loop fastener structure described above, but may be other suspension structures.

[0057] As shown in Figure 15, the cushion surface material 30 includes a cushion surface 31 that covers the cushion pad material 20, a cushion locking member 32 for attaching and detaching the cushion surface 31 to the cushion pad material 20, and a surface suspension member 33 for suspending the cushion surface 31 in the suspension groove 20c. As shown in Figure 2, the cushion cover 31 covers the surface 20a of the cushion pad material 20 and extends to the back surface 20b of the cushion pad material 20. The extended end of the cushion cover 31 is then locked to a cushion locking member 23 provided on the back surface 20b of the cushion pad material 20.

[0058] The cushion locking member 32 is, for example, a hook fastener (hook portion) and is a member for locking onto the cushion locking member 23 of the cushion pad material 20. The cushion locking member 32 is fixed to the end of the cushion surface 31 by adhesive or sewing. In this way, the cushion surface material 30 can be attached to and detached from the cushion pad material 20 using relatively lightweight hook-and-loop fasteners, making the seat cushion 1 even lighter.

[0059] The surface suspension member 33 is, for example, a hook fastener (hook portion) and is a member for suspending the cushion surface 31 to the suspension member 24 of the cushion pad material 20. The surface suspension member 33 is sewn to the cushion surface 31 at a position corresponding to the suspension groove 20c. In this way, since the cushion surface material 30 is suspended with relatively lightweight hook-and-loop fasteners, the seat cushion 1 can be made even lighter.

[0060] <<Detailed configuration of the seatback>> Next, we will describe each component of the seat back 2. Figure 4 shows the back pad material 50 with the back surface material 60 removed. The seat back 2 has a two-layer structure, consisting of a back support 40 made of a first foam and a back pad material 50 made of a second foam. As shown in Figure 5, the back pad material 50 can be removed from the back support 40.

[0061] The back support 40 is a rigid foam made, for example, from expanded polypropylene (EPP), and supports the back and head of the seated person. As shown in Figure 2, the front surface 40a of the back support 40 is a laminated surface for laminating the back pad material 50. The rear surface 40b of the back support 40 is a mounting surface for attaching it to the wall surface W of the mobile body. The rear surface 40b is a flat surface and is attached to a flat wall surface W.

[0062] As shown in Figure 6, the back support 40 includes a back support body 41 that supports the seated person from behind, and a back engaging member 42 for engaging with the back pad material 50. Furthermore, as shown in Figures 2 and 16, a wall connecting member 43 is provided on the rear surface 40b of the back support 40 for attachment to a wall connecting member Wa provided on the wall surface W of the moving body. The back engaging member 42 and the wall connecting member 43 are fixed to the back support 40, for example, with adhesive. Note that the back engaging member 42 and the wall connecting member 43 may be embedded by insert molding during the foam molding of the back support 40. The back support body 41 of the back support 40 has a U-shape when viewed from the direction that supports the seated person (i.e., in a front view). Because the back support 40, which is made of the first foam, has a U-shape, it can support the seated person from the side, ensuring a secure hold. Furthermore, because the back support 40 supports the back or part of the buttocks of the seated person, it can be made even lighter. In addition, because the back support 40 has a U-shape, the area corresponding to the seated person's back is flatter than if it were, for example, H-shaped, thus reducing discomfort for the seated person.

[0063] As shown in Figures 5, 16, and 17, the back support body 41 has an extended portion 41a that extends in the sheet width direction, a first lateral portion 41b and a second lateral portion 41c that extend upward from both ends of the extended portion 41a in the sheet width direction, and a housing portion 41d for housing the wall connecting member 43. In other words, the first lateral portion 41b and the second lateral portion 41c of the back support body 41 have housing portions 41d for housing the wall connecting member 43.

[0064] As shown in Figure 17, the extended portion 41a has a rectangular shape that is elongated in the sheet width direction when viewed from the front. As shown in Figures 5 and 6, the first lateral portion 41b and the second lateral portion 41c are parts that bulge forward to support the torso of the seated person from the side. Also, as shown in Figure 3, when the back pad material 50 engages with the back support 40, the upper ends of the first lateral portion 41b and the second lateral portion 41c are located below the upper end of the back pad material 50. In this way, the back support 40 is formed smaller than the back pad material 50, which makes the seat back 2 compact and prevents the overall seat from becoming larger. Furthermore, because the size is suppressed, the ease of installation is improved.

[0065] As shown in Figure 6, the housing section 41d is a circular hole that penetrates in the loading direction (i.e., the front-to-back direction) and houses the wall connecting member 43 inside. The diameter of the hole in the housing section 41d is progressively larger on the front side 40a than on the rear side 40b, and the wall connecting member 43 is fixed to the smaller diameter section. As shown in Figure 17, two housing sections 41d are formed on the first side section 41b and two on the second side section 41c. By forming a storage section 41d that penetrates vertically through the back support body 41, the seat back 2 can be made even lighter.

[0066] As shown in Figure 17, the back engaging member 42 is, for example, a hook-and-loop fastener (loop portion) and is a member for which the back engaging member 52 of the back pad material 50 engages. The back engaging member 42 is located in the center of the extended portion 41a in a front view. The back engaging member 42 extends elongated in the sheet width direction and one is placed on the extended portion 41a. Note that the hook-and-loop fastener may be a hook portion.

[0067] As shown in Figure 2, the wall connection member 43 is a member for attachment to the wall surface W of the mobile body, and is a cylindrical member that is detachably fitted to, for example, a wall connection member Wa (specifically, a metal pin) formed on the wall surface W. More specifically, the wall connection member 43 is fixed inside the housing section 41d and is detachably attached to the wall connection member Wa of the mobile body. Because the back support 40 can be detachably attached to the wall surface W of the mobile body by the wall connection member 43, maintainability, assembly, and customizability can be improved. The wall connecting member 43 has two first connecting portions 43a located on the right first lateral portion 41b and two second connecting portions 43b located on the left second lateral portion 41c. The two first connecting portions 43a are arranged side by side in the vertical direction. The two second connecting portions 43b are at the same height as the first connecting portions 43a and are arranged side by side in the vertical direction.

[0068] The back pad material 50 is a soft foam formed from a foamed resin such as urethane foam, and supports the back and head of the sitter. The back pad material 50 is softer and less rigid than the back support 40. Therefore, the support force of the seat back 2 can be increased by the rigid back support 40, while the seating feel can be improved by the flexible back pad material 50. The back pad material 50 may also be harder than the back support 40.

[0069] As shown in Figure 4, the surface 50a of the back pad material 50 is the seating surface on which the sitter sits. The surface 50a of the back pad material 50 has a suspension groove 50c for suspending the back upholstery material 60 and a splice relief groove 50d for accommodating the splices of the back upholstery material 60. As shown in Figure 2, the back surface 50b of the back pad material 50 is a surface facing the laminated surface and wall surface W of the back support 40. The lower portion of the back surface 50b has a shape corresponding to the laminated surface of the back support 40 and is a smooth surface. The upper portion of the back surface 50b has a shape corresponding to the wall surface W and is a flat surface.

[0070] As shown in Figures 11 and 18, the back pad material 50 includes a back pad body 51 that supports the sitter from behind, a back engagement member 52 that detachably engages with the back support 40, a back locking member 53 that detachably locks with the back surface material 60, a suspension member 54 for suspending the back surface material 60, and a mounting member 55 that detachably attaches to a mounting member Wb on the wall surface W. The back engagement member 52, the back locking member 53, and the mounting member 55 are provided on the back surface 50b of the back pad material 50. The suspension member 54 is provided inside the suspension groove 50c on the front surface 50a side of the back pad material 50. The back engagement member 52, back locking member 53, suspension member 54, and mounting member 55 are each fixed to the back pad material 50, for example, with adhesive. Alternatively, the back engagement member 52, back locking member 53, suspension member 54, and mounting member 55 may be embedded by insert molding during the foam molding of the back pad material 50.

[0071] The back engagement member 52, the back locking member 53, and the mounting member 55 are provided only on the back surface 50b of the back pad material 50. That is, the back surface material 60 engages only with the suspension member 54 on its surface 50a. Thus, since the back engagement member 52 and the back locking member 53 are not provided on the surface 50a of the back pad material 50, it is possible to suppress the occurrence of wrinkles in the back surface material 60 on the surface 50a side of the back pad material 50. In addition, since the back surface material 60 is arranged flat, the unevenness of the back surface material 60 can be suppressed.

[0072] As shown in Figures 5, 18, and 20, the back pad body 51 has a pressure-receiving portion 51a that supports the back and head of the seated person, a raised portion 51b provided on both sides of the pressure-receiving portion 51a in the seat width direction, a stepped portion 51c that is formed with a thin thickness along the contour of the back pad material 50, and a second stepped portion 51d that is recessed in the stacking direction compared to the stepped portion 51c. Furthermore, an engaging recess 51e is formed on the back surface 50b of the back pad material 50, which is recessed in the lamination direction and engages with the first lateral portion 41b and the second lateral portion 41c. In other words, the engaging recess 51e is a portion recessed forward from the back surface 50b of the back pad material 50. In addition, a through hole 51f is formed in the back pad body 51 that penetrates in the front-to-back direction.

[0073] As shown in Figure 19, the pressure-receiving portion 51a has a shape that extends vertically in a front view. As shown in Figure 3, when viewed from the stacking direction (i.e., in a rear view of the sheet back 2), the pressure-receiving portion 51a is positioned between the first lateral portion 41b and the second lateral portion 41c in the sheet width direction. Also, as shown in Figure 2, the back surface of the pressure-receiving portion 51a and the mounting surfaces of the first lateral portion 41b and the second lateral portion 41c to the wall surface W are flush. Because the mounting surface of the back pad material 50 is flush, the pressure-receiving portion 51a is suitably supported by the wall surface W. Therefore, rattling of the mobile sheet S can be suppressed. In addition, the back support 40 can be made smaller, so the mobile sheet S can be made even lighter.

[0074] The pressure-receiving portion 51a of the back pad material 50 is detachably attached to the wall surface W. In other words, the pressure-receiving portion 51a is supported from the rear by the first lateral portion 41b, the second lateral portion 41c and the wall surface W. In this way, since the back pad material 50 is supported by both the back support 40 and the wall surface W of the moving body, the support capacity of the back pad material 50 can be increased while reducing its weight.

[0075] As shown in Figure 11, the embankment portion 51b is a part that bulges forward to support the torso of the seated person from the side. An engagement recess 51e is formed in the rear portion of the embankment portion 51b.

[0076] As shown in Figures 18 and 20, the stepped portion 51c is a recessed portion on the back surface 50b of the back pad material 50 that extends forward from the pressure-receiving portion 51a. The stepped portion 51c is formed along the contour of the back pad material 50. Specifically, the stepped portion 51c is formed on the outer edge of the back surface 50b and on the periphery of the through hole 51f. Multiple back locking members 53 are arranged on the stepped portion 51c. The stepped portion 51c is thinner by the thickness of the back locking member 53 and the back surface material 60. Therefore, when the back surface material 60 is locked to the back pad material 50, the back surface material 60 and the back surface 50b become flush, and the surface facing the laminated surface can be made flat.

[0077] As shown in Figures 18 and 20, the second step portion 51d is a recessed portion on the back surface 50b of the back pad material 50, extending forward from the step portion 51c. The second step portion 51d is formed on the outside of the through hole 51f in the sheet width direction. A back locking member 53 is positioned in the second step portion 51d. The back locking member 53 (specifically the linear locking portion 53a) positioned in the second step portion 51d is arranged continuously between the step portion 51c and the second step portion 51d.

[0078] The second stage 51d is thinner by the thickness of the back locking member 53 and the two back surface materials 60. Therefore, when the back surface material 60 is locked to the back pad material 50, the back surface material 60 and the back surface 50b become flush, making the surface facing the wall W flat. In particular, the back surface material 60 is arranged overlapping on the outside of the through hole 51f in the sheet width direction. Therefore, even if there are parts where multiple back surface materials 60 overlap, these parts are located in the deeper recessed second stage 51d, so the back surface 50b of the back pad material 50 becomes flat. Consequently, when the back pad material 50 and the back support 40 are laminated together, rattling of the back pad material 50 can be suppressed.

[0079] As shown in Figure 21, hook-and-loop fasteners may be provided in the overlapping portion 51g where the back surface materials 60 overlap, for attaching and detaching the back surface materials 60 from each other. Providing hook-and-loop fasteners on the back surface materials 60 helps to prevent the back surface materials 60 from shifting position when they are secured to the back pad material 50.

[0080] As shown in Figure 11, the engaging recess 51e is formed behind the first lateral portion 41b and the second lateral portion 41c and is recessed forward. As shown in Figure 2, the engaging recess 51e engages with the first lateral portion 41b and the second lateral portion 41c, thereby supporting the back pad material 50 on the back support 40. In this way, by forming an engaging recess 51e on the back surface 50b of the back pad material 50 that corresponds to the shape of the back support 40, it is possible to suppress the positional displacement of the back pad material 50 in the vertical and sheet width directions when the back pad material 50 is laminated onto the back support 40. Furthermore, since the first lateral portion 41b and the second lateral portion 41c themselves engage with the back pad material 50, there is no need to provide a separate member for engagement. Therefore, it is possible to suppress an increase in the overall size of the sheet.

[0081] As shown in Figure 3, the through-hole 51f extends in the front-to-back direction and is a hole for inserting a seat belt (not shown). The seat belt, which is positioned on the wall surface W of the mobile body, is inserted through the through-hole 51f and holds both shoulders of the person seated in the mobile body seat S. The seat belt may also be designed to hold only one shoulder of the seated person. In this case, there may be only one through-hole 51f formed in the back pad material 50.

[0082] As shown in Figure 18, the back engaging member 52 is, for example, a hook fastener (hook portion) and is a member for engaging with the back engaged member 42 of the back support 40. In a rear view, the back engaging member 52 is provided at the lower end of the pressure receiving portion 51a. The back engaging member 52 extends elongated in the sheet width direction and is positioned as a single unit at the lower end of the pressure receiving portion 51a. In other words, only one back engaging member 52 is provided on the back pad material 50 and is positioned opposite the extended portion 41a. Note that the hook fastener may be a loop portion. In this way, since only one back engagement member 52 is provided on the back pad material 50, the number of parts can be reduced while ensuring support force.

[0083] As shown in Figure 18, the back locking member 53 is, for example, a hook-and-loop fastener (loop portion) and is a member for locking the back locking member 62 of the back surface material 60. Multiple back locking members 53 are arranged on the stepped portion 51c and the second stepped portion 51d along the outer edge of the back surface 50b and the periphery of the through hole 51f of the back pad material 50. Note that the hook-and-loop fastener may also be a hook portion. When viewed from the stacking direction (i.e., from the rear), the back engaging member 52 is positioned inside the back locking member 53. Also, when viewed from the stacking direction, the back locking member 53 is positioned closer to the contour of the back pad material 50 than the back engaging member 52.

[0084] Thus, the back locking member 53 is positioned near the contour, and the back engaging member 52 is positioned inside the back locking member 53. As shown in Figure 21, since the back locking member 53 is covered by the back surface material 60, it is possible to prevent the back engaging member 52, which is inside the back locking member 53, from coming into contact with the worker's hand when the worker grips the back pad material 50.

[0085] Furthermore, as shown in Figure 18, a back locking member 53 is provided in the straight portion 50e of the back pad material 50 where the contour extends in a straight line. Only one back locking member 53 (specifically, a straight locking portion 53a) is provided corresponding to the straight portion 50e. In other words, one straight portion 50e is provided with only one long straight locking portion 53a corresponding to that straight portion 50e, and the straight locking portion 53a is not divided. Thus, since there is only one back locking member 53 positioned corresponding to the straight section 50e, the occurrence of wrinkles in the back surface material 60 can be suppressed. In addition, since the back surface material 60 is positioned flat, the unevenness of the back surface material 60 can be suppressed.

[0086] The number and position of the back locking members 53 are not limited to those shown. In this embodiment, the back locking members 53 provided on the curved portion of the contour of the back pad material 50 consist of a plurality of back locking members 53 having a straight shape. However, for example, the back locking members 53 may have a curved shape corresponding to the curved portion. Also, a straight locking portion 53a may be divided and arranged for a single straight portion 50e.

[0087] As shown in Figure 19, the suspension member 54 is, for example, a hook-and-loop fastener (loop portion) and is a member for engaging with the surface suspension member (not shown) of the back surface material 60. Multiple suspension members 54 are arranged inside the suspension groove 50c of the back pad material 50. Since the surface attachment structure of the back surface material 60 is the same as that of the cushion surface material 30, a detailed explanation will be omitted.

[0088] As shown in Figure 2, the mounting member 55 is, for example, a hook fastener (hook portion) and is detachably attached to the mounting member Wb on the wall surface W (specifically, the loop portion of the hook fastener). As shown in Figure 18, multiple mounting members 55 are arranged on the pressure receiving portion 51a and the stepped portion 51c on the back surface 50b of the back pad material 50. Note that the hook fastener may be the loop portion. When viewed from the stacking direction (i.e., from the rear), the mounting member 55 is positioned inside the back locking member 53. Also, the number of back engaging members 52 is less than the number of mounting members 55. Specifically, the back surface 50b of the back pad material 50 is provided with one back engaging member 52 and nine mounting members 55.

[0089] Thus, the back locking member 53 is positioned near the contour, and the mounting member 55 is positioned inside the back locking member 53. As shown in Figure 21, since the back locking member 53 is covered by the back surface material 60, it is possible to prevent the mounting member 55, which is inside the back locking member 53, from coming into contact with the worker's hand when the worker grips the back pad material 50. Furthermore, by reducing the number of back engaging members 52 to fewer than the number of mounting members 55, the number of back engaged members 42 provided on the back support 40 can be reduced. Therefore, since there are fewer back engaging members 52 that engage the back pad material 50 and the back support 40, the number of steps required to attach and detach the back pad material 50 and the back support 40 can be reduced. In addition, the overall weight of the seat back 2 can be reduced.

[0090] Although the mounting member 55 is provided only on the seat back 2, it may also be provided on the seat cushion 1. In this case, a portion of the cushion pad material 20 is detachably attached to the floor surface F.

[0091] As shown in Figure 2, the back cover material 60 includes a back cover 61 that covers the back pad material 50 and a back locking member 62 for attaching and detaching the back cover 61 to the back pad material 50. The back cover 61 covers the surface 50a of the back pad material 50 and extends to the back surface 50b of the back pad material 50. The extended end of the back cover 61 is then locked to a back locking member 53 provided on the back surface 50b of the back pad material 50.

[0092] The back locking member 62 is, for example, a hook fastener (hook portion) and is a member for locking onto the back locking member 53 of the back pad material 50. The back locking member 62 is fixed to the end of the back surface 61 by adhesive or sewing. The hook fastener may also be a loop portion. In this way, the back surface material 60 can be attached to the back pad material 50 with a relatively lightweight hook-and-loop fastener, which further reduces the weight of the seat back 2.

[0093] <Second Embodiment> The following description of the mobile seat S2 of the second embodiment according to the present invention will be made with reference to Figures 22 and 23. Note that the description of components that overlap with the mobile seat S described above will be omitted.

[0094] The mobile seat S2 includes a seat cushion 101 that supports the seated person's buttocks and a seat back 102 that supports the seated person's back and head. The seat back 102 includes a back support 140. In the mobile seat S2, the configuration of the back support 140 differs from the configuration of the back support 40 of the mobile seat S.

[0095] As shown in Figures 22 and 23, the back support 140 has a back support body 141 that supports the seated person from behind. The rear surface 140b of the back support 140 is provided with a wall connection member 143 for attachment to the wall connection member Wa, and a plurality of grooves 144. As shown in Figure 22, the groove 144 extends linearly in a direction intersecting the sheet width direction (i.e., vertical direction) when viewed from the lamination direction (i.e., front-to-back direction) in which the back pad material is laminated on the back support 140. The groove 144 has three first grooves 144a located on the first lateral portion 141b and three second grooves 144b located on the second lateral portion 141c. The three first grooves 144a are arranged linearly in the vertical direction. The three second grooves 144b are arranged linearly in the vertical direction.

[0096] As shown in Figure 23, the groove 144 is a groove formed on the side of the back support 140 opposite to the laminated surface (i.e., the front surface 140a) (i.e., the rear surface 140b). As such, multiple grooves 144 are provided, making it possible to reduce the weight of the seat back 102.

[0097] The groove 144 is concave in shape, recessed forward from the rear surface 140b, and has a flat groove bottom surface 145. When viewed from the sheet width direction, the groove bottom surface 145 of the groove 144 extends parallel to the laminate surface. In other words, the groove bottom surface 145 is inclined to correspond to the mountain shape of the laminate surface (i.e., the front surface 140a of the back support 140). Thus, since the groove bottom surface 145 extends parallel to the laminated surface of the back support 140, the thickness of the portion where the groove 144 is formed on the front surface 140a side of the back support body 141 becomes approximately uniform. Therefore, the occurrence of stress concentration in the back support 140 can be suppressed.

[0098] Furthermore, as shown in Figure 22, in a rear view, the right wall connecting member 143 is positioned between the first grooves 144a that are arranged vertically. The left wall connecting member 143 is positioned between the second grooves 144b that are arranged vertically. In this way, since the wall connecting member 143 is provided between the easily flexible grooves 144, the design intersection of the wall connecting member 143 can be absorbed by the deflection of the grooves 144.

[0099] <Third Embodiment> The third embodiment of the mobile body sheet S3 according to the present invention will be described below with reference to Figure 24. Note that the configurations that overlap with the mobile body sheets S and S2 described above will not be explained.

[0100] The mobile seat S3 comprises a seat cushion 201 that supports the seated person's buttocks and a seat back 202 that supports the seated person's back and head. The front portion of the cushion support 210 of the seat cushion 201 protrudes downward in accordance with the floor surface F. The upper portion of the back support 240 of the seat back 202 protrudes backward in accordance with the wall surface W. In this way, by configuring the shapes of the seat cushion 201 and the seat back 202 to match the floor surface F or wall surface W, the seat S3 for the mobile body can be easily attached to and detached from the mobile body.

[0101] <Fourth Embodiment> The following describes the mobile seat S4 of the fourth embodiment according to the present invention with reference to Figure 25. Note that the configurations that overlap with the mobile seats S, S2, and S3 described above will not be explained.

[0102] The mobile seat S4 comprises a seat cushion 301 that supports the seated person's buttocks and a seat back 302 that supports the seated person's back and head. The rear portion of the cushion support 310 of the seat cushion 301 protrudes downward in accordance with the floor surface F. The lower portion of the back support 340 of the seat back 302 protrudes backward in accordance with the wall surface W. In this way, by configuring the shapes of the seat cushion 301 and the seat back 302 to match the floor surface F or wall surface W, the seat S4 for the mobile body can be easily attached to and detached from the mobile body.

[0103] <Fifth Embodiment> The fifth embodiment of the mobile body sheet S5 according to the present invention will be described below with reference to Figure 26. Note that the configurations that overlap with the mobile body sheets S, S2, S3, and S4 described above will not be explained.

[0104] The mobile seat S5 comprises a seat cushion 401 that supports the seated person's buttocks and a seat back 402 that supports the seated person's back and head. The front portion of the cushion support 410 of the seat cushion 401 is cut out upward to match the floor surface F. The lower portion of the back support 440 of the seat back 402 is cut out forward to match the wall surface W. In this way, by configuring the shapes of the seat cushion 401 and the seat back 402 to match the floor surface F or wall surface W, the seat S5 for the mobile body can be easily attached to and detached from the mobile body.

[0105] <Sixth Embodiment> Hereinafter, the mobile seat S6 of the sixth embodiment of the present invention will be described with reference to Figure 27. Note that the descriptions of configurations that overlap with the mobile seats S, S2, S3, S4, and S5 described above will be omitted.

[0106] The mobile seat S6 comprises a seat cushion 501 that supports the seated person's buttocks and a seat back 502 that supports the seated person's back and head. The rear portion of the cushion support 510 of the seat cushion 501 is cut upward to match the floor surface F. The upper portion of the back support 540 of the seat back 502 is cut forward to match the wall surface W. In this way, by configuring the shapes of the seat cushion 501 and the seat back 502 to match the floor surface F or wall surface W, the seat S6 for the mobile body can be easily attached to and detached from the mobile body.

[0107] <Seventh Embodiment> Hereinafter, the mobile seat S7 of the seventh embodiment according to the present invention will be described with reference to Figure 28. Note that the description of configurations that overlap with the mobile seats S, S2, S3, S4, S5, and S6 described above will be omitted.

[0108] The mobile seat S7 includes a seat cushion 601 that supports the seated person's buttocks and a seat back 602 that supports the seated person's back. The cushion support 610 of the seat cushion 601 includes a cushion support body 611 that supports the occupant from below, and a cushion engaging member 612 for engaging with a cushion pad material (not shown). The cushion support body 611 of the cushion support 610 has a U-shape when viewed from the direction that supports the occupant (i.e., in a top view). The back support 640 of the seat back 602 includes a back support body 641 that supports the occupant from the rear, and a back engaging member 642 for engaging with a back pad material (not shown).

[0109] In other words, the mobile seat S7 is configured by swapping the seat cushion 1 and seat back 2 of the mobile seat S. Because the cushion support 610 has a U-shape, when the seat cushion 601 is placed on the floor surface F, a portion of the cushion pad material can be directly attached to the floor surface F.

[0110] <Other Embodiments> The mobile seat S has a configuration in which a roughly square support and a U-shaped support are applied to the seat cushion 1 and seat back 2, one each, but the shape of the support is not limited to these. For example, a configuration in which a roughly square support is applied to both the seat cushion 1 and the seat back 2 is also possible. Alternatively, a configuration in which a U-shaped support is applied to both the seat cushion 1 and the seat back 2 is also possible. Furthermore, the seat S for the mobile vehicle is not limited to a configuration that includes both a seat cushion 1 and a seat back 2. For example, the seat S for the mobile vehicle may have a configuration that includes only a seat cushion 1, or a configuration that includes only a seat back 2.

[0111] <Manufacturing method> Furthermore, the manufacturing method for the mobile sheet S is as follows. Note that the manufacturing process for the mobile sheet S other than those described below will not be explained.

[0112] A method for manufacturing a seat S for a mobile body includes the steps of placing a seat cushion 1 on the floor surface F of the mobile body and placing a seat back 2 on the wall surface W of the mobile body. The seat back 2 may be placed on the mobile body first, or the seat cushion 1 and seat back 2 may be placed simultaneously.

[0113] To elaborate, first, the worker prepares the cushion support 10, cushion pad material 20, cushion surface material 30, back support 40, back pad material 50, and back surface material 60. Specifically, the cushion support 10 and back support 40 are foam-molded to form a first high-hardness foam. Then, the cushion pad material 20 and back pad material 50 are foam-molded to form a second low-hardness foam.

[0114] Then, the worker attaches the cushion surface material 30 to the cushion pad material 20. Specifically, the worker covers the surface 20a of the cushion pad material 20 with the cushion surface material 31 and locks the cushion locking member 32 to the cushion locking member 23. At this time, the surface material suspension member 33 is attached to the suspension member 24 and the cushion surface material 31 is suspended into the suspension groove 20c.

[0115] Furthermore, the worker attaches the cushion support 10 to the floor surface F. Specifically, the worker fits the floor connecting member 13 onto the floor connecting member Fa of the floor surface F. Then, the worker grasps the cushion pad material 20 with the cushion surface material 30 attached to it and stacks the cushion pad material 20 onto the cushion support 10. Specifically, the worker engages the cushion engaging member 22 with the cushion engaging member 12 from above. In this way, the seat cushion 1 is placed on the floor surface F. At this time, the worker positions the cushion pad material 20 such that the cushion surface material 30 is located between the cushion support 10 and the cushion pad material 20 in the vertical direction.

[0116] Next, the worker attaches the back cover material 60 to the back pad material 50. Specifically, the worker covers the surface 50a of the back pad material 50 with the back cover material 61 and locks the back locking member 62 to the back locking member 53. At this time, the cover suspension member (not shown) is attached to the suspension member 54 and the back cover material 61 is suspended into the suspension groove 50c. Furthermore, the worker attaches the back support 40 to the wall surface W. Specifically, the worker fits the wall connecting member 43 onto the wall connecting member Wa of the wall surface W. Then, the worker grasps the back pad material 50 with the back surface material 60 attached to it, and attaches the back pad material 50 to the wall surface W while stacking it on the back support 40. Specifically, the worker engages the back engaging member 52 with the back engaging member 42 from the front, and attaches the mounting member 55 to the mounting member Wb from the front. In this way, the seat back 2 is positioned on the wall surface W. At this time, the worker positions the back pad material 50 such that the back surface material 60 is located between the back support 40 and the back pad material 50 in the front-rear direction.

[0117] Alternatively, the cushion pad material 20 may be attached to the cushion support 10 first, and then the cushion support 10 may be attached to the floor surface F. More specifically, the worker attaches the cushion surface material 30 to the cushion pad material 20. Then, the cushion pad material 20 is engaged with the cushion support 10. After that, the cushion support 10, cushion pad material 20, and cushion surface material 30 are attached to the floor surface F. Alternatively, the back pad material 50 may be attached to the back support 40, and then the back support 40 may be attached to the wall surface W.

[0118] In this way, a mobile seat S can be manufactured that is lightweight while improving maintainability, ease of assembly, and customizability.

[0119] In the above embodiment, a seat for a mobile vehicle used in an aircraft such as an eVTOL was described as a specific example, but it is not particularly limited and can be used for various seats such as seats for automobiles, motorcycles, trains and buses, airplanes and ships, as well as office chairs for work, wheelchairs, and children's seats in shopping carts.

[0120] In this embodiment, the present invention has been described primarily in relation to a sheet for a mobile body. However, the embodiments described above are merely examples to facilitate understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included. [Explanation of Symbols]

[0121] S, S2, S3, S4, S5, S6, S7 Seats for moving objects 1, 101, 201, 301, 401, 501, 601 Seat cushions 2, 102, 202, 302, 402, 502, 602 Seatback 10, 110, 210, 310, 410, 510, 610 Cushion support (support) 10a top surface 10b Bottom side 11,611 Cushion support body 11a Central part 11b Embankment 11c Pad storage area 11d Front part 11e Rear part 11th floor step section 12, 612 Cushioned Engaged Member 12a Central engaged part 12b Front engaged part 13 Floor connection member 13a Front connection section 13b Rear connection section 14 grooves 14a Central groove 14b Side groove 15 Groove bottom surface 15a Upward slope 15b Downward slope 16 vertices 20 Cushion pad material (pad material) 20a surface 20b back side 20c Hanging groove 20d peeling escape groove 20e Straight section 21 Cushion pad main body 21a Support part 21b Pad embankment 21c pad section 21d Front side 21e Rear side 21f Projection 22 Cushion engaging member 22a Central engagement part 22b Front engaging part 23 Cushion locking member 23a Straight locking part 24 Suspension Member 30 Cushion surface material 31 Cushion surface 32 Cushioned locking member 33 Skin suspension member 40, 140, 240, 340, 440, 540, 640 Back support (support) 40a, 140a front 40b, 140b rear 41, 141, 641 Back support body 41a Extension 41b, 141b First lateral part 41c, 141c second lateral part 41d Storage area 42, 642 Back engaged member 43, 143 Wall connection members 43a First connection section 43b Second connection section 144 grooves 144a First groove 144b Second groove 145 Groove bottom surface 50 Back pad material (pad material) 50a surface 50b back side 50c Hanging groove 50d relief groove 50e Straight section 51 Back pad main unit 51a Pressure receiving part 51b Embankment 51c Stepped section 51d Second stage section 51e Engaging recess 51f through hole 51g overlapping portion 52 Back engaging member 53 Back locking member 53a Straight locking section 54 Suspension Member 55 Mounting components 60 Back surface material 61 Back surface 62 Back locking member F Floor Fa Floor covering connection member W Wall Wa Wall-mounted connecting member Wb Mounted Member

Claims

1. A seat for mobile devices, A support made of the first foam, The pad material comprises a second foam, which is laminated on the support and is softer than the first foam, On the surface of the support opposite to the laminated surface on which the pad material is laminated, a long groove is formed. The groove extends in a direction intersecting the sheet width direction when viewed from the lamination direction in which the pad material is laminated on the support, A sheet for a mobile body, characterized in that the bottom surface of the groove extends parallel to the laminated surface when viewed from the sheet width direction.

2. The aforementioned seat for the mobile vehicle has a seat cushion for supporting the buttocks of the person sitting there. The aforementioned seat cushion comprises the support and the pad material, The groove comprises a central groove formed in the center in the sheet width direction and lateral grooves provided at positions spaced apart from the central groove in the sheet width direction. In a side view of the sheet, the bottom surface of the central groove and the bottom surface of the lateral grooves each have an apex. The sheet for a moving body according to claim 1, characterized in that the apex of the central groove at the bottom of the groove is higher than the apex of the lateral groove at the bottom of the groove.

3. The sheet for a mobile body according to claim 2, characterized in that, in a side view of the sheet, the apex of the groove bottom surface of the lateral recess is located behind the apex of the groove bottom surface of the central recess.

4. A connecting member is provided on the lower surface of the support for attachment to a member to be connected, which is provided on the floor surface of the mobile body. The sheet for a mobile body according to claim 2 or 3, characterized in that, when viewed from below the sheet, the connecting member is positioned between the central groove and the lateral groove in the width direction of the sheet.

5. The sheet for a mobile body according to claim 4, characterized in that, when viewed from below the sheet, the connecting member is positioned between the front end of the central groove and the front end of the lateral groove.

Images