Seat

Abstract

To provide a seat that is able to appropriately reduce wobbling of a seated person in a yaw direction even when a top plate main is separated from a top plate side.SOLUTION: A seat includes a seat back 1 having: a cushion body 2 for elastically supporting a seated person; and a back frame 3 for supporting the cushion body 2 from the back side of the seat. The cushion body 2 is composed of three divided elements, i.e., a top plate main 2A forming a central portion in a seat-width direction and top plate sides 2B forming both side portions in the seat-width direction. The top plate main 2A has: a main pad A1 forming a seat pad; and a main base material A3 applied to a pad back-surface of the main pad A1. The main base material A3 has a pair of side bulging portions (first side bulging portions A33) in the seat-width direction that bulge so as to enter a pair of recesses A11 in the seat-width direction formed on both side portions in the seat-width direction of the pad back-surface of the main pad A1.SELECTED DRAWING: Figure 13

Description

Technical Field

[0001] The present invention relates to a seat. More specifically, the present invention relates to a seat having a cushion body that elastically supports a seated person and a seat frame that supports the cushion body from the back side of the seat.

Background Art

[0002] Patent Document 1 discloses a seat in which a cushion body composed of a seat pad and a seat cover that wraps the seat pad is divided into three parts in the seat width direction. Specifically, the cushion body is divided into a top plate main body that forms the central portion in the seat width direction and each top plate side that forms both side portions in the seat width direction. The top plate main body and each top plate side are individually fixed to the seat frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration described in Patent Document 1, since the pads of the top plate main body and each top plate side are not connected to each other, the top plate main body is likely to sink. Therefore, it is not possible to appropriately suppress the wobbling of the seated person in the yaw direction. Thus, the present invention provides a seat that can appropriately reduce the wobbling of the seated person in the yaw direction even when the top plate main body is separated from the top plate side.

Means for Solving the Problems

[0005] As means for solving the above problems, the seat of the present invention takes the following means.

[0006] That is, the first invention of the present invention is a seat having a cushion body that elastically supports a seated person and a seat frame that supports the cushion body from the back side of the seat, wherein the cushion body is composed of three divided elements, namely a top plate main portion forming the central portion in the seat width direction and each top plate side portion forming both side portions in the seat width direction, the top plate main portion having a main pad forming a seat pad and a main base material applied to the back surface of the pad of the main pad, and the main base material having a pair of side bulges in the seat width direction that bulge so as to enter a pair of recesses in the seat width direction formed in both side portions in the seat width direction on the back surface of the pad of the main pad.

[0007] According to the first invention, the pair of side bulges of the main base material can strongly support both side portions of the main pad from the back side of the seat more strongly than the central portion. As a result, even if the top plate main portion is separated from each top plate side portion, it is possible to reduce the wobbling of the seated person in the yaw direction.

[0008] The second invention of the present invention is the seat according to the first invention, wherein the pair of side bulges are provided at a position where the arrangement in the seat height direction overlaps with the pelvis support portion of the top plate main portion that supports the pelvis of the seated person in the seat back, or at a position where the arrangement in the seat front-rear direction overlaps with the ischium support portion of the top plate main portion that supports the left and right ischiums of the seated person in the seat cushion.

[0009] According to the second invention, the pair of side bulges of the main base material can suppress the rotation of the pelvis or the left and right ischiums of the seated person in the yaw direction. As a result, it is possible to more appropriately reduce the wobbling of the seated person in the yaw direction.

[0010] The third invention of the present invention is the seat according to the first or second invention, wherein the main base material is fixed to the seat frame.

[0011] According to the third invention, the pair of side bulges of the main base material supported by the seat frame can more appropriately reduce the swaying of the seated person in the yaw direction.

[0012] According to a fourth invention of the present invention, in the first or second invention, the pair of side bulges are inclined surfaces that are inclined so as to support the main pad in a planar manner from the obliquely outer side of the seat back in the corresponding pair of recesses, and the seat has the inclined surfaces.

[0013] According to the fourth invention, the pair of side bulges of the main base material can appropriately support the seated person from the lateral direction. As a result, the swaying of the seated person in the yaw direction can be more appropriately reduced.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0015] Hereinafter, the mode for carrying out the present invention will be described with reference to the drawings.

[0016] 《First Embodiment》 (Schematic Configuration of Sheet S) First, the configuration of the sheet S according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 15. In the following description, when indicating each direction such as front, rear, up, down, left, and right, the respective directions shown in each figure shall be referred to.

[0017] Also, when indicating each direction with "sheet" attached, such as "sheet width direction", it shall refer to the respective directions based on the sheet S. Further, in the following description, when no specific reference figure is shown, or when there is no reference numeral corresponding to the reference figure, any one of FIGS. 1 to 15 shall be appropriately referred to.

[0018] As shown in FIG. 1, the sheet S according to the present embodiment is configured as a single-seat for mounting on an automobile. The sheet S includes a seat back 1 that serves as the backrest portion of the seated person, a seat cushion (not shown) that serves as the seating portion, and a headrest H that serves as the headrest portion.

[0019] The lower ends of both left and right sides of the seat back 1 are connected to the rear ends of both left and right sides of the seat cushion via a recliner (not shown). Thereby, the seat back 1 can appropriately adjust the backrest angle with respect to the seat cushion.

[0020] As shown in FIG. 2, the seat back 1 has a cushion body 2 that elastically supports the back of the seated person, and a back frame 3 that supports the cushion body 2 from the back side (rear side) of the seat. The cushion body 2 is configured to be divided into three divided elements: a top plate main body 2A that forms the central portion in the seat width direction, and each top plate side 2B that forms both side portions in the seat width direction. Here, the back frame 3 corresponds to the "seat frame" of the present invention.

[0021] The back frame 3 is composed of metal members assembled in a frame shape when viewed from the front. Inside the frame of the back frame 3, a lumbar support 3D that can enhance the support of the seated person's waist is provided. The seat back 1 further has a cloth-like member 4 made of non-woven fabric stretched inside the frame of the back frame 3. The cloth-like member 4 is made of a so-called needle-punched non-woven fabric.

[0022] The cloth-like member 4 is a member that functions like a so-called hammock to support the top plate main body 2A in a planar manner from the back side against the back frame 3. The cloth-like member 4 is stretched inside the frame of the back frame 3 so as to be located in front of the lumbar support 3D.

[0023] Since the cushion body 2 is divided into the top plate main body 2A and each top plate side 2B as described above, it is possible to perform replacement according to the specifications for each divided element. The top plate main body 2A and each top plate side 2B can be easily assembled to the back frame 3 generally only by access from the front of the seat.

[0024] Since the top plate main body 2A is separated from each top plate side 2B, it is more likely to sink into the back side of the seat with respect to the load received from the back of the seated person. The reason is that the pads of the top plate main body 2A and each top plate side 2B are not connected to each other.

[0025] If the top plate main body 2A is likely to sink to the back side of the seat, when the vehicle is cornering, the support of the seated person's body by the top plate main body 2A becomes insufficient. As a result, the seated person's body is likely to wobble in the yaw direction.

[0026] Therefore, the seat S according to the present embodiment is configured to be able to appropriately support the top plate main body 2A from the back side of the seat in order to appropriately suppress the wobbling of the seated person's body in the yaw direction. One of them is a structure in which the top plate main body 2A is supported from the back side of the seat by the above-described cloth-like member 4.

[0027] (Configuration of the back frame 3) Hereinafter, the specific configuration of each part of the seat back 1 will be described in detail. First, the configuration of the back frame 3 will be described. As shown in FIG. 3, the back frame 3 has a pair of left and right long plate-shaped side frames 3A extending in the seat height direction along both left and right side portions of the seat back 1.

[0028] Further, the back frame 3 has an upper frame 3B extending in the seat width direction along the upper side portion of the seat back 1. The back frame 3 also has a lower frame 3C extending in the seat width direction along the lower side portion of the seat back 1.

[0029] Further, the back frame 3 further has a lumbar support 3D provided so as to be suspended between the side frames 3A from the upper frame 3B. The lower part of the lumbar support 3D is elastically supported from the back side of the seat by the lower frame 3C via a spring (not shown).

[0030] Brackets 3E are bolted to the outer sides of the side frames 3A. Hook claws E1 capable of hooking upper and lower two side hanging holes 4B formed at both left and right end portions of the cloth-like member 4 are formed on these brackets 3E. Each hook claw E1 has a claw shape protruding rearward of the seat from each bracket 3E.

[0031] In addition, at two positions on the left and right sides of the upper frame 3B, rectangular tube-shaped headrest support brackets B5 extending in the seat height direction are welded so as to penetrate in the seat height direction. These headrest support brackets B5 serve as holder portions for inserting and attaching a pair of left and right headrest stays (not shown) hanging down from the headrest H described above in FIG. 1 from above the seat.

[0032] (Configuration of the cloth-like member 4) The above-described cloth-like member 4 is assembled to the back frame 3 as follows. As shown in FIG. 4, first, two upper hook holes 4A formed at the upper terminal portion of the cloth-like member 4 are hooked by passing them from above the seat through the tip portions of the respective headrest support brackets B5 protruding upward from the upper frame 3B above the seat.

[0033] Next, the cloth-like member 4 is suspended from the front side of the back frame 3 with the hooked upper terminal portion as a fulcrum. Then, as shown in FIG. 5, the left and right terminal portions of the cloth-like member 4 are pulled in so as to be wound around the respective side frames 3A from the outside to the rear side.

[0034] Then, two upper and lower side hook holes 4B formed at the left and right terminal portions of the cloth-like member 4 are hooked by passing them from the rear side of the seat through the corresponding hook claws E1 protruding rearward from the seat from the respective brackets 3E. Thereby, as shown in FIG. 6, the cloth-like member 4 is stretched in a state of covering the seat front side across the upper frame 3B and the respective side frames 3A.

[0035] The lower terminal portion of the cloth-like member 4 is also hooked to the lower frame 3C of the back frame 3. Specifically, the lower terminal portion of the cloth-like member 4 is hooked to the lower frame 3C in accordance with the assembly of the top plate main body 2A shown in FIG. 2 to the back frame 3. The assembly of the lower terminal portion of the cloth-like member 4 will be described in detail together with the description of the top plate main body 2A later.

[0036] By the above assembly, the cloth-like member 4 is provided in a state of covering the side edge A5 at the tip, which is bent inward in the sheet width direction at the front edge of each side frame 3A, from the front of the sheet. Further, the cloth-like member 4 is provided so as to extend across the division line L (see FIGS. 13 to 15) between the top plate main body 2A and each top plate side 2B to be described later in the sheet width direction.

[0037] (Configuration of the cushion body 2) Next, the configurations of the top plate main body 2A and each top plate side 2B will be described. As shown in FIGS. 2 and 7 to 8, the top plate main body 2A includes a main pad A1 made of foamed urethane, a main cover A2 made of fabric covering the main pad A1, and a main base material A3 made of resin applied to the main pad A1 from the back side of the pad.

[0038] The main cover A2 is placed on the main pad A1 from the front side of the pad. As shown in FIGS. 7 to 8, the upper side and the left and right cover terminals of the main cover A2 are drawn into the back side of the main pad A1. And each cover terminal of the main cover A2 is fixed to each peripheral edge of the main base material A3 that is applied to the back surface of the main pad A1.

[0039] By this fixing, the main cover A2 is integrated with the main base material A3 so as to wrap the main pad A1 between the main cover A2 and the main base material A3. As a result, the main base material A3 is fixed in a state of being applied to the back surface of the main pad A1 through the main cover A2.

[0040] As shown in FIGS. 2 and 7 to 8, each top plate side 2B similarly includes a side pad B1 made of foamed urethane, a side cover B2 made of fabric covering the side pad B1, and a side base material B3 made of resin applied to the side pad B1 from the back side of the pad.

[0041] Each side cover B2 is covered on the side pad B1 from the front side of the pad. As shown in FIGS. 7 to 8, for each side cover B2, each of its upper, lower, left, and right cover terminals is drawn into the back side of the side pad B1. And each of these cover terminals of the side cover B2 is fixed to each peripheral edge of the side base material B3 that is applied to the back surface of the side pad B1 of the side pad B1.

[0042] By this fixing, each side cover B2 is integrated with the side base material B3 so as to wrap the side pad B1 between the side cover B2 and the side base material B3. As a result, each side base material B3 is fixed in a state where it is applied to the back surface of the side pad B1 through the side cover B2.

[0043] As shown in FIG. 2, the top plate main body 2A and each top plate side 2B are individually assembled to the back frame 3 by access from the front of the sheet. The top plate main body 2A and each top plate side 2B are assembled to the back frame 3 from the front of the sheet after the cloth-like member 4 is assembled to the back frame 3.

[0044] Specifically, first, each top plate side 2B is assembled to the back frame 3. The procedure is as follows. As shown in FIG. 7, first, a fitting protrusion B31 that hangs down from the eaves portion on the back side of the base material and is formed on the upper edge portion of the side base material B3 of each top plate side 2B is passed through from above the sheet into fitting holes B6 that open above the sheet and are formed at both left and right ends of the upper frame 3B to be hooked.

[0045] Next, each top plate side 2B is set so as to be applied to each side frame 3A from the front with the hooked upper end portion as a fulcrum. And each top plate side 2B is pressed against each side frame 3A from the front.

[0046] Thereby, clips (not shown) assembled to each side base material B3 are inserted from the front of the seat into mounting holes of corresponding brackets 3E bolted to each side frame 3A and snap-fitted. As shown in FIG. 9, as a result, each top plate side 2B is integrally fixed to the back frame 3.

[0047] After the above assembly, subsequently, the top plate main body 2A (see FIG. 2) is assembled to the back frame 3. The procedure is as follows. As shown in FIG. 7, first, two left and right upper hanging holes A4 formed in the eaves portions projecting rearward from the upper edge of the top plate main body 2A are hung by passing them from above the seat through the tip portions of two left and right headrest support brackets B5 projecting upward from the upper frame 3B.

[0048] As shown in FIG. 12, then, the top plate main body 2A is set so as to abut from the front against a cloth-like member 4 (located on the front side of the lumbar support 3D) with the hung upper end portion as a fulcrum. Then, the lower cover terminal of the main cover A2 is drawn rearward in the seat so as to be wound around the lower frame 3C from below together with the lower portion of the main pad A1.

[0049] And it is fixed by hooking a hooking tool A22 composed of a resin J-hook sewn to the lower cover terminal of the main cover A2 from below to the lower frame 3C. As shown in FIG. 10, as a result, the top plate main body 2A is integrally fixed to the back frame 3 in a state where the gap (split line L) in the seat width direction between each top plate side 2B is filled.

[0050] As shown in FIG. 12, the lower cover terminal of the main cover A2 described above is configured such that when the hooking tool A22 is hooked to the lower frame 3C, the hooking tool A22 is first passed through a lower hooking hole 4C formed in the lower terminal portion of the cloth-like member 4. Thereby, as the lower cover terminal of the main cover A2 is fixed to the lower frame 3C, the lower terminal portion of the cloth-like member 4 is also fixed to the lower frame 3C via the main cover A2.

[0051] As a result, the cloth-like member 4 is also wound around the lower frame 3C from below together with the main cover A2 and the main pad A1. With the above assembly, the upper part of the top plate main body 2A is supported from the back side of the seat by the upper frame 3B (see FIG. 7). Further, in the region from the middle part to the lower part of the top plate main body 2A, the lamb support 3D elastically supports it from the back side of the seat.

[0052] Furthermore, the top plate main body 2A is supported in a planar manner from the back side of the seat by the cloth-like member 4 stretched on the back frame 3 (see FIGS. 12 to 15). With these supports, the top plate main body 2A can support the body of the seated person from the back side of the seat with an appropriate hardness feeling.

[0053] In addition, even when a load in the yaw direction is input from the back of the seated person during cornering of the vehicle, the both side portions of the top plate main body 2A are supported from the back side of the seat by the cloth-like member 4, so that it is difficult to sink into the back side of the seat. With such a configuration, even when the top plate main body 2A is separated from each top plate side 2B, it can support the body of the seated person so as to be difficult to sway in the yaw direction during cornering of the vehicle.

[0054] As shown in FIGS. 13 to 15, the cloth-like member 4 is provided so as to extend across the division line L between the top plate main body 2A and each top plate side 2B in the seat width direction. Therefore, the cloth-like member 4 can prevent foreign matter from entering the seat from the gap between the top plate main body 2A and each top plate side 2B.

[0055] Each top plate side 2B is supported from the back side of the seat by each side frame 3A in substantially the entire region in the seat height direction. Each top plate side 2B has a configuration in which their side base materials B3 support the side pads B1 in a planar manner from the back and obliquely outward side of the seat. Thereby, each top plate side 2B can appropriately support the back of the seated person from both the left and right outer sides.

[0056] Specifically, the side base material B3 of each top plate side 2B is configured to support the side pad B1 in a planar manner from the obliquely outer side of the sheet back surface by a surface portion that obliquely extends so as to cover each of those side frames 3A from the front side and the inner side in the sheet width direction. Due to these structures, each top plate side 2B is configured to be less likely to sink into the sheet back side than the top plate main body 2A.

[0057] As shown in FIG. 11, the main base material A3 of the top plate main body 2A is shaped like a frame when viewed from the front. Specifically, the main base material A3 has a ladder shape in which the spaces between the left and right frame side portions A32 thereof are connected at a plurality of locations in the sheet height direction.

[0058] On the left and right frame side portions A32 of the main base material A3, first side bulging portions A33 that bulge forward of the sheet are formed in regions near their lower parts. These first side bulging portions A33 are formed at positions where the pelvic support portion R of the top plate main body 2A, that is, the portion that supports the pelvis of the seated person, overlaps in the sheet height direction. Here, each first side bulging portion A33 corresponds to the "side bulging portion" of the present invention.

[0059] As shown in FIG. 13, specifically, each first side bulging portion A33 is configured to be extruded in a shape that forms an inclined surface M that faces obliquely inward from the left and right frame side portions A32 of the main base material A3 toward the front of the sheet. On the main pad A1, recesses A11 that are recessed in accordance with the shapes of the respective first side bulging portions A33 protruding from the main base material A3 are formed in both left and right side portions on the back surface of the pad.

[0060] Thereby, each first side bulging portion A33 is shaped to bulge so as to enter into each recess A11 of the main pad A1. Due to the bulging of these first side bulging portions A33, the top plate main body 2A has both side portions of the main pad A1 made thinner than the central portion, and each first side bulging portion A33 can firmly support the back of the seated person from the sheet back side.

[0061] Specifically, each first side bulging portion A33 is configured such that its inclined surface M supports the main pad A1 in a planar manner from the obliquely outer side of the seat back. Thereby, the top plate main body 2A can support the pelvis of the seated person in a planar manner from both left and right outer sides by the inclined surfaces M of the respective first side bulging portions A33 of the main base material A3.

[0062] Due to these supports, even when a load in the yaw direction is input from the pelvis of the seated person during cornering of the vehicle, both side portions of the top plate main body 2A are strongly supported from the seat back side by the respective first side bulging portions A33, making it difficult for the top plate main body 2A to sink into the seat back side. With such a configuration, even when the top plate main body 2A is separated from each top plate side 2B, it can support the body of the seated person so as to be less likely to wobble in the yaw direction during cornering of the vehicle.

[0063] Specifically, each first side bulging portion A33 is formed on the main base material A3 fixed to the back frame 3. Therefore, the respective first side bulging portions A33 of the main base material A3 supported by the back frame 3 can more appropriately reduce the wobbling of the seated person in the yaw direction.

[0064] As shown in FIG. 11, the left and right frame side portions A32 of the main base material A3 are supported in a planar manner from the seat back side by the extending portions B32 whose regions closer to the upper part of the seat extend inward in the seat width direction from each side base material B3. These extending portions B32 are formed at positions above the pelvis support portion R of the top plate main body 2A.

[0065] As shown in FIG. 14, specifically, each extending portion B32 is configured to extend in a flat plate shape across the division line L between the top plate main body 2A and each top plate side 2B from the outer side to the inner side in the seat width direction. Specifically, each extending portion B32 extends inward to a position where its arrangement in the seat width direction overlaps with that of the lumbar support 3D that supports the top plate main body 2A from the back side of the pad.

[0066] As a result, each extending portion B32 is disposed so as to be sandwiched between the top plate main body 2A and the lumbar support 3D. Due to the support from the back side of the seat by these extending portions B32, the left and right side portions of the top plate main body 2A can firmly support the back of the seated person from the back side of the seat.

[0067] Accordingly, even when a yaw-direction load is input from the pelvis of the seated person during cornering of the vehicle, the top plate main body 2A is less likely to sink into the back side of the seat because its both side portions are strongly supported from the back side of the seat by the respective extending portions B32. Therefore, even when the top plate main body 2A is separated from each top plate side 2B, it can support the body of the seated person so as to be less likely to wobble in the yaw direction during cornering of the vehicle.

[0068] The left and right frame side portions A32 of the main base material A3 supported by each extending portion B32 from the back side of the seat are covered from the back side of the seat by a base material covering portion A21 which is a part of the cover terminal drawn into the back side of the seat of the main cover A2. By interposing the base material covering portion A21 between the main base material A3 and each extending portion B32 in this way, direct contact between the main base material A3 and each extending portion B32 can be reasonably prevented. As a result, generation of abnormal noise due to contact between resins can be appropriately suppressed. In FIGS. 7 to 8, in order to clearly show the configuration of the main base material A3, illustration of the base material covering portion A21 is omitted.

[0069] Each extending portion B32 extends inward in the seat width direction from each side base material B3. Therefore, even if the top plate main body 2A is assembled to the back frame 3 after each top plate side 2B is assembled to the back frame 3, each extending portion B32 does not inhibit the assembly of the top plate main body 2A.

[0070] As shown in FIG. 11, second side bulging portions A34 that bulge forward in the seat are formed in the intermediate region in the seat height direction between the first side bulging portions A33 and the extending portions B32 described above on the left and right frame side portions A32 of the main base material A3. Here, each second side bulging portion A34 corresponds to the "side bulging portion" of the present invention.

[0071] As shown in FIG. 15, each second side bulging portion A34 is configured to be extruded so as to form an inclined surface M that faces obliquely inward from the left and right frame side portions A32 of the main base material A3 toward the front of the sheet. In the main pad A1, recesses A11 that are recessed according to the shape of each second side bulging portion A34 protruding from the main base material A3 are formed in the left and right side portions on the back surface of the pad.

[0072] Thereby, each second side bulging portion A34 is shaped to bulge so as to enter each recess A11 of the main pad A1. Due to the bulging of these second side bulging portions A34, the top plate main body 2A is such that both side portions of the main pad A1 are thinner than the central portion, and can firmly support the back of the seated person from the back side of the seat.

[0073] Specifically, each second side bulging portion A34 is configured such that their inclined surfaces M support the main pad A1 in a planar manner from the outer diagonal back side of the seat. Thereby, the top plate main body 2A can support the back of the seated person in a planar manner from both left and right outer sides by the inclined surfaces M of each second side bulging portion A34 of the main base material A3.

[0074] Due to these supports, even when a load in the yaw direction is input from the back of the seated person during cornering of the vehicle, the top plate main body 2A is less likely to sink into the back side of the seat because both of its side portions are strongly supported by the respective second side bulging portions A34 from the back side of the seat. With such a configuration, even when the top plate main body 2A is separated from each top plate side 2B, it can support the body of the seated person so as to be less likely to wobble in the yaw direction during cornering of the vehicle.

[0075] Specifically, each second side bulging portion A34 is formed on the main base material A3 fixed to the back frame 3. Therefore, the yaw-direction wobbling of the seated person can be more appropriately reduced by each second side bulging portion A34 of the main base material A3 supported by the back frame 3.

[0076] Summarizing the above, the sheet S according to the present embodiment is configured as follows. In the following, the reference numerals in parentheses correspond to the respective configurations shown in the above embodiment.

[0077] That is, the sheet (S) has a cushion body (2) that elastically supports a seated person, and a sheet frame (3) that supports the cushion body (2) from the back side of the sheet. The cushion body (2) is composed of three divided elements: a top plate main part (2A) forming the central part in the sheet width direction, and each top plate side part (2B) forming both side parts in the sheet width direction. The top plate main part (2A) has a main pad (A1) forming a seat pad, and a main base material (A3) applied to the pad back surface of the main pad (A1).

[0078] The main base material (A3) has a pair of side bulging parts (A33, A34) in the sheet width direction that bulge so as to enter into a pair of recesses (A11) in the sheet width direction formed in both side parts in the sheet width direction on the pad back surface of the main pad (A1). According to the above configuration, the pair of side bulging parts (A33, A34) of the main base material (A3) can strongly support both side parts of the main pad (A1) from the back side of the sheet more strongly than the central part. As a result, even if the top plate main part (2A) is separated from each top plate side part (2B), it is possible to reduce the wobbling of the seated person in the yaw direction.

[0079] In addition, the pair of side bulging parts (A33) are provided at positions where the arrangement in the sheet height direction overlaps with the pelvis support part (R) of the top plate main part (2A) that supports the pelvis of the seated person in the seat back (1). According to the above configuration, the pair of side bulging parts (A33) of the main base material (A3) can suppress the rotation of the pelvis of the seated person in the yaw direction. As a result, it is possible to more appropriately reduce the wobbling of the seated person in the yaw direction.

[0080] Further, the main base material (A3) is fixed to the seat frame (3). According to the above configuration, the pair of side bulging portions (A33, A34) of the main base material (A3) supported by the seat frame (3) can more appropriately reduce the swaying of the seated person in the yaw direction.

[0081] Also, the pair of side bulging portions (A33, A34) has an inclined surface (M) that inclines so as to support the main pad (A1) planar from the obliquely outer side of the seat back within the corresponding pair of concave portions (A11). According to the above configuration, the pair of side bulging portions (A33, A34) of the main base material (A3) can appropriately support the seated person also from the lateral direction. As a result, the swaying of the seated person in the yaw direction can be more appropriately reduced.

[0082] 《Regarding Other Embodiments》 As described above, the embodiments of the present invention have been described using one embodiment, but the present invention can be implemented in various forms in addition to the above embodiments.

[0083] 1. The seat of the present invention may be applied to vehicles other than automobiles such as railways, airplanes, and ships. Further, the seat may be installed in various facilities (for non-vehicles) such as sports facilities, theaters, concert halls, and event venues in addition to vehicles. The configuration of the present invention is applicable not only to the seat back but also to the seat cushion.

[0084] 2. The bulging shape of the pair of side bulging portions provided on the main base material may be a shape that is pushed out so as to form an inclined surface facing obliquely inward toward the front of the seat, or a shape that is pushed out in a barrel shape toward the front of the seat.

[0085] When the configuration of the present invention is applied to a seat cushion, it is preferable that a pair of side bulging portions provided on the main base material are provided at positions where the seating bone support portions of the top plate main body that support the left and right sitting bones of the seated person in the seat cushion overlap with the arrangement in the front-rear direction of the seat. With this arrangement, it becomes possible to appropriately suppress the rotation in the yaw direction of the left and right sitting bones of the seated person by the pair of side bulging portions.

[0086] 3. The main cover and / or the side cover may be made of a leather material in addition to the fabric.

Explanation of Reference Numerals

[0087] 1 Seat back 2 Cushion body 2A Top plate main body A1 Main pad A11 Recessed portion A2 Main cover A21 Base material covering portion A22 Hanging tool A3 Main base material A32 Frame side portion A33 First side bulging portion (side bulging portion) A34 Second side bulging portion (side bulging portion) A4 Upper hanging hole 2B Top plate side B1 Side pad B2 Side cover B3 Side base material B31 Fitting protrusion B32 Extended portion 3 Back frame (seat frame) 3A Side frame A5 Side edge 3B Upper frame B5 Headrest support bracket B6 Fitting hole 3C Lower frame 3D Lumbar support 3E Bracket E1 Hanging claw 4 Cloth-like member 4A Upper Hanging Hole 4B Side Hanging Hole 4C Lower Hanging Hole L Split Line M Inclined Plane R Pelvis Support Part S Seat H Headrest

Claims

1. A seat having a cushion body that elastically supports a seated person and a seat frame that supports the cushion body from the back side of the seat, wherein the cushion body is composed of three divided elements: a top plate main part forming the central part in the seat width direction and each top plate side part forming both side parts in the seat width direction, the top plate main part has a main pad forming a seat pad and a main base material applied to the back surface of the main pad, and the main base material has a pair of side bulges in the seat width direction that bulge so as to enter into a pair of recesses in the seat width direction formed in both side parts in the seat width direction on the back surface of the main pad of the main pad. A seat.

2. The seat according to claim 1, wherein the pair of side bulges are provided at a position where the arrangement in the seat height direction overlaps with the pelvic support part of the top plate main part that supports the pelvis of the seated person in the seat back, or at a position where the arrangement in the seat front-rear direction overlaps with the ischial support part of the top plate main part that supports the left and right ischial bones of the seated person in the seat cushion.

3. The seat according to claim 1 or claim 2, wherein the main base material is fixed to the seat frame.

4. The seat according to claim 1 or claim 2, wherein the pair of side bulges have inclined surfaces that incline so as to support the main pad in a planar manner from the obliquely outer side of the seat in the corresponding pair of recesses.

Images