Seat and cushion member

Abstract

To provide a seat to / from which a cushion member can be easily attached / detached, and the cushion member which can be easily attached / detached to / from a seat body.SOLUTION: This seat is provided with a seat body side S1 having a seat part side S2 and a back rest side S0 on which a person sits, and the seat part side S1 and the back rest side S2 have recessed parts 10 formed in a part of a seat surface S10 and a S20. The seat further includes a cushion member 100 which is attachable to and detachable from the recessed part 10 and fits in the recessed part 10 in an attached state.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a seat having a seat portion and a backrest, and a cushion member attached to the seat body. [Background technology]

[0002] A sheet has been known in the past in which the surface of a foam pad is covered with a surface skin, and the surface skin is composed of a surface cover and a surrounding cover, and the surface cover is detachable from the surrounding cover (Patent Document 1). In this technology, the surface cover and the surrounding cover are connected on the outer surface of the sheet by wire fasteners, hook and loop fasteners, or hook means. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-097947 Summary of the Invention [Problem to be solved by the invention]

[0004] When the cushion member is made detachable from the seat body, it is desirable that the cushion member be easily detachable.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a cushion member that can be easily attached and detached. Another object is to firmly hold the cushion member. Another object is to prevent the cushion member from sliding down. [Means for solving the problem]

[0006] A seat for achieving the above-mentioned object comprises a seat body having a seat portion on which a person sits and a backrest, wherein at least one of the seat portion and the backrest has a recess formed in a part of the seat surface, and further comprises a cushion member which is detachable from the recess and fits into the recess when attached.

[0007] The cushion member is characterized in that it is attached to the seat body of a seat having a seat portion on which a person sits and a backrest, and at least one of the seat portion and the backrest has a recess formed in part of the seat surface, and is detachable from the recess and fits into the recess when attached.

[0008] With this configuration, the cushion member can be easily attached by simply fitting it into the recess, and can be easily removed by simply pulling the cushion member out of the recess. This makes it easy to attach and detach the cushion member.

[0009] In the above-described configuration, the seat and the backrest have a pad and a cover covering the pad, and the recess can be formed by covering a pad recess formed in the pad with the cover.

[0010] In the above-described configuration, the recess may have an inner surface that holds the cushion member when the cushion member is fitted in the recess.

[0011] This allows the cushion member fitted in the recess to be firmly held.

[0012] In the above-described configuration, the recess includes a backrest recess formed in a part of the seat surface of the backrest, the cushion member includes a backrest cushion that is detachable from the backrest recess and fits into the backrest recess when attached, and may further include a retention mechanism that prevents the backrest cushion that fits into the backrest recess from sliding down.

[0013] This can prevent the backrest cushion fitted in the backrest recess from sliding down.

[0014] In the above-described configuration, the retaining mechanism may include a hook portion provided on the backrest, covering at least a portion of the lower part of the backrest recess when viewed from the front, and positioned so as to sandwich the backrest cushion between itself and the bottom surface of the backrest recess when the backrest cushion is fitted into the backrest recess, thereby supporting the backrest cushion.

[0015] With this, the backrest cushion fitted into the backrest recess is caught on the hook portion, thereby preventing the lower end of the backrest cushion from shifting forward and sliding down.

[0016] In the above-described configuration, the retaining mechanism may include a convex or concave engaging portion provided on the backrest cushion and an engaged portion provided on the backrest, which is a concave or convex engaged portion with which the engaging portion engages when the backrest cushion is fitted into the backrest recess.

[0017] With this, when the backrest cushion is fitted into the backrest recess, the engaging portion and the engaged portion engage with each other, thereby preventing the backrest cushion from sliding down.

[0018] In the above-described configuration, the holding mechanism may include a first magnetic member provided on the backrest and a second magnetic member provided on the backrest cushion, the second magnetic member being attracted to the first magnetic member by magnetic force when the backrest cushion is fitted into the backrest recess.

[0019] According to this, when the backrest cushion is fitted into the backrest recess, the second magnetic member is attracted to the first magnetic member by magnetic force, thereby preventing the backrest cushion from sliding down.

[0020] In the above-described configuration, the retaining mechanism may include a friction member provided on at least one of the backrest cushion and the backrest, which generates a friction force between the backrest cushion and the backrest, thereby preventing the backrest cushion fitted into the backrest recess from slipping down.

[0021] According to this, when the backrest cushion fits into the backrest recess, a frictional force is generated between the backrest cushion and the backrest, so that the backrest cushion can be prevented from sliding down.

[0022] In the above-described configuration, the retaining mechanism may include a hook-and-loop fastener consisting of a first fastener member provided on the backrest and a second fastener member provided on the backrest cushion, the second fastener member being detachable from the first fastener member and adhering to the first fastener member when the backrest cushion is fitted into the backrest recess.

[0023] With this, when the backrest cushion is fitted into the backrest recess, the fastener members stick together, thereby preventing the backrest cushion from sliding down.

[0024] In the above-described configuration, the cushion member may include a cushion pad and a cushion skin covering the cushion pad. [Effects of the Invention]

[0025] According to the present invention, the cushion member can be easily attached and detached.

[0026] Furthermore, since the recess has an inner surface that holds the cushion member, the cushion member fitted in the recess can be firmly held.

[0027] Furthermore, by providing a retaining mechanism, it is possible to prevent the backrest cushion fitted into the backrest recess from sliding down. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a perspective view of a seat according to an embodiment. [Figure 2] 1A is a perspective view of a seat body and a cushion member, and FIG. 1B is a perspective view of the cushion member in a portable state. [Figure 3] FIG. 2 is a vertical cross-sectional view of the seat portion and backrest of the seat body and the cushion member. [Figure 4] FIG. 2 is a cross-sectional view of the seat and seat cushion. [Figure 5] FIG. 2 is a cross-sectional view of the backrest and backrest cushion. [Figure 6] FIG. 10 is a diagram showing a seat holding mechanism according to a first modified example. [Figure 7] FIG. 10 is a diagram showing a seat holding mechanism according to a second modified example. [Figure 8] FIG. 10 is a diagram showing a seat holding mechanism according to a third modified example. [Figure 9] FIG. 10 is a diagram showing a seat holding mechanism according to a fourth modified example. [Figure 10] 10A, 10B, and 10C are perspective views of cushion members according to modified examples, showing a fifth modified example, a sixth modified example, and a seventh modified example, respectively. [Figure 11] 13A is a perspective view of a seat according to an eighth modified example, FIG. 13B is a perspective view of a cushion member, and FIG. 13C is a perspective view of the cushion member in a carryable state. [Figure 12] 13(a) is a perspective view of a seat body and a cushion member of a seat according to a ninth modified example, and FIG. 13(b) is a perspective view of a seat body and a cushion member of a seat according to a tenth modified example. [Figure 13] 10(a) and 10(b) are diagrams showing modified examples of the handle. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this specification, the terms "front, back, left, right, top, bottom" and "bottom" refer to the front, back, left, right, top, bottom as seen from the perspective of a person sitting in the seat. As shown in FIG. 1, the seat is configured as a vehicle seat S to be installed in an automobile, and includes a seat body S0 and a cushion member 100 attached to the seat body S0 of the vehicle seat S.

[0030] The seat body S0 has a seat portion S1 on which a person sits, a backrest S2, and a headrest S3. As shown in Figures 1 and 2(a), the cushion member 100 is detachable from the seat surfaces S10, S20 of the seat portion S1 and the backrest S2 that support a person seated in the vehicle seat S. More specifically, the cushion member 100 is detachable from the recess 10 of the seat body S0.

[0031] As shown in Figure 3, the seat S1 and backrest S2 have a frame 20, a pad 30 that covers the frame 20, and a cover 40 that covers the pad 30. More specifically, the frame 20 has a seat frame 21 that forms the frame of the seat S1 and a back frame 22 that forms the frame of the backrest S2. The pad 30 is made of urethane foam or the like and has a seat pad 31 and a back pad 32. The cover 40 is made of fabric, leather, or the like and has a seat cover 41 and a back cover 42.

[0032] The seat S1 is constructed by covering the seat frame 21 with the seat pad 31 and the seat cover 41. The backrest S2 is constructed by covering the backrest frame 22 with the backrest pad 32 and the backrest cover 42.

[0033] The seat S1 and the backrest S2 have recesses 10 formed in parts of the seat surfaces S10, S20. The recesses 10 include a seat recess 11 formed in part of the seat surface S10 of the seat S1, and a backrest recess 12 formed in part of the seat surface S20 of the backrest S2.

[0034] As shown in Fig. 2(a), the seat S1 has a seat center S11 and left and right seat side portions S12 located on both the left and right sides of the seat center S11 and projecting upward beyond the seat center S11. The seat recess 11 is generally rectangular when viewed from above and is formed on the seat surface S10 of the seat S1 from the center in the front-to-rear direction of the seat center S11 to the rear. As shown in Fig. 4, the seat recess 11 is formed by covering a pad recess 31A formed in a seat pad 31 with a seat cover 41.

[0035] 2(a), the backrest S2 has a backrest center portion S21 and left and right backrest side portions S22 that are provided on both the left and right sides of the backrest center portion S21 and protrude forward beyond the backrest center portion S21. The backrest recess 12 is generally rectangular when viewed from the front and is formed on the seat surface S20 of the backrest S2, extending from the center in the up-down direction of the backrest center portion S21 to the lower portion. As shown in FIG. 5, the backrest recess 12 is formed by covering a pad recess 32A formed in a backrest pad 32 with a backrest cover 42.

[0036] As shown in FIG. 2(a), the cushion member 100 has a seat cushion 110, a back cushion 120, and a handle .

[0037] 4 and 5, the cushion member 100 has a cushion pad P and a cushion skin C that covers the cushion pad P. Specifically, the cushion pad P is made of urethane foam or the like and has a seat cushion pad 111 and a backrest cushion pad 121. The cushion skin C is made of fabric, leather, or the like and has a seat cushion skin 112 and a backrest cushion skin 122.

[0038] As shown in Fig. 4, the seat cushion 110 is formed by covering a seat cushion pad 111 with a seat cushion skin 112. As shown in Fig. 5, the back cushion 120 is formed by covering a back cushion pad 121 with a back cushion skin 122.

[0039] As shown in FIG. 2(a), in this embodiment, the seat cushion 110 and the back cushion 120 have approximately the same shape and size. More specifically, both the seat cushion 110 and the back cushion 120 have an approximately rectangular plate shape. The left-right width of the seat cushion 110 and the left-right width of the back cushion 120 are approximately the same. The front-to-back length of the seat cushion 110 and the up-to-down length of the back cushion 120 are also approximately the same. The thickness of the seat cushion 110 and the thickness of the back cushion 120 are also approximately the same.

[0040] The seat cushion 110 is detachable from the seat surface S10 of the seat S1. More specifically, the seat cushion 110 is detachable from the seat recess 11. As shown in FIG. 4, the seat cushion 110 fits into the seat recess 11 when attached to the seat surface S10 of the seat S1. The seat recess 11 has left and right inner surfaces 11A and 11B that sandwich the seat cushion 110 when the seat cushion 110 of the cushion member 100 is fitted into the seat recess 11. Also, as shown in FIG. 3, the seat recess 11 has front and rear inner surfaces 11C and 11D that sandwich the seat cushion 110 when the seat cushion 110 is fitted into the seat recess 11.

[0041] The seat cushion 110 is formed to fit into the seat recess 11 in a slightly compressed state. As a result, when the seat cushion 110 is fitted into the seat recess 11, the left, right, and front, and rear side surfaces of the seat cushion 110 come into close contact with the left, right, and front, and rear inner surfaces 11A to 11D of the seat recess 11. When the seat cushion 110 is fitted into the seat recess 11, the contours of the seat cushion 110 and the seat recess 11 become approximately the same.

[0042] As shown in Fig. 5, the backrest cushion 120 is detachable from the seat surface S20 of the backrest S2. More specifically, the backrest cushion 120 is detachable from the backrest recess 12. The backrest cushion 120 fits into the backrest recess 12 when attached to the seat surface S20 of the backrest S2. The backrest recess 12 has left and right inner surfaces 12A and 12B that sandwich the backrest cushion 120 of the cushion member 100 when it is fitted into the backrest recess 12. Also, as shown in Fig. 3, the backrest recess 12 has upper and lower inner surfaces 12C and 12D that sandwich the backrest cushion 120 when it is fitted into the backrest recess 12.

[0043] The backrest cushion 120 is formed to fit into the backrest recess 12 in a slightly compressed state. As a result, when the backrest cushion 120 is fitted into the backrest recess 12, the left, right, and top and bottom side surfaces of the backrest cushion 120 are in close contact with the left, right, top and bottom inner surfaces 12A to 12D of the backrest recess 12. The contours of the backrest cushion 120 and the backrest recess 12 are approximately the same when the backrest cushion 120 is fitted into the backrest recess 12.

[0044] As shown in Fig. 2(a), handle 130 is a part that a person can hook onto and hold, and is provided to connect seat cushion 110 and back cushion 120. Handle 130 is made of, for example, fabric or leather, and is a roughly H-shaped member with notches 131A and 131B at the top and bottom. For example, handle 130 is provided with its lower end connected to the rear end of the back surface (lower surface) of seat cushion 110, and its upper end connected to the lower end of the back surface (rear surface) of back cushion 120.

[0045] 3, when the seat cushion 110 is fitted into the seat recess 11, the lower portion of the handle 130 enters the seat recess 11 together with the seat cushion 110 and is positioned between the rear side surface of the seat cushion 110 and the rear inner surface 11D of the seat recess 11. Furthermore, when the backrest cushion 120 is fitted into the backrest recess 12, the upper portion of the handle 130 enters the backrest recess 12 together with the backrest cushion 120 and is positioned between the lower side surface of the backrest cushion 120 and the lower inner surface 12D of the backrest recess 12.

[0046] 2(b), cushion member 100 can be made portable by folding the upper and lower portions of handle 130 to form a roughly U-shape and by placing the back surfaces of seat cushion 110 and backrest cushion 120 together. Handle 130 has hole 131 for holding the hand. Hole 131 is formed by parts of notches 131A, 131B formed in handle 130 and the edges of seat cushion 110 and backrest cushion 120.

[0047] As shown in Fig. 1, the seat body S0 further has left and right child seat mounting parts 50. The child seat mounting parts 50 are provided with fixing brackets for mounting a child seat, and are arranged at a predetermined distance on the left and right. Although a detailed description of the specific structure of the child seat mounting parts 50 will not be given in this specification, for example, a child seat fixing structure defined by the international standard ISOFIX can be adopted.

[0048] The handles 130 of the cushion member 100 are provided so as to be positioned between the left and right child seat attachment portions 50 when the cushion member 100 is attached to the seat body S0.

[0049] Specifically, the left and right child seat attachment portions 50 are arranged in positions that fit within the width of the seat cushion 110 and the backrest cushion 120 in the left-right direction. The left-right width of the handle 130 is smaller than the distance between the left and right child seat attachment portions 50, and the handle 130 is provided in a position that corresponds to the position between the left and right child seat attachment portions 50 in the left-right direction. Specifically, the handle 130 is provided near the center of the cushion member 100 in the left-right direction. As a result, when the cushion member 100 is attached to the seat main body S0, the entire handle 130 is positioned between the left and right child seat attachment portions 50.

[0050] The vehicle seat S further includes a retaining mechanism 60. The retaining mechanism 60 is a mechanism for preventing the backrest cushion 120 fitted into the backrest recess 12 from sliding down due to the lower end of the backrest cushion 120 slipping forward as shown by the imaginary line in Fig. 3. In this embodiment, the retaining mechanism 60 has left and right hook portions 61.

[0051] The hooking portion 61 is a substantially right-angled triangular member made of, for example, fabric or leather, and is provided on the backrest S2. Specifically, as shown in Fig. 2(a), the hooking portion 61 is provided so as to cover a part of the lower part of the backrest recess 12 when viewed from the front. More specifically, the hooking portion 61 is provided so as to cover the left and right corners located below the backrest recess 12 when viewed from the front.

[0052] The left hook portion 61 is attached to the left and lower portions of the left corner of the seat surface S20 of the backrest S2, which is located below the backrest recess 12. The right hook portion 61 is attached to the right and lower portions of the right corner of the seat surface S20 of the backrest S2, which is located below the backrest recess 12.

[0053] 5, when the backrest cushion 120 is fitted into the backrest recess 12, the hooking portion 61 is disposed to sandwich the backrest cushion 120 between itself and the bottom surface 12E of the backrest recess 12, thereby supporting the backrest cushion 120. In this way, the hooking portion 61 prevents the lower end of the backrest cushion 120 fitted into the backrest recess 12 from moving forward.

[0054] According to the present embodiment described above, the cushion member 100 can be easily attached by simply fitting it into the recess 10, and the cushion member 100 fitted into the recess 10 can be easily removed by simply pulling it out of the recess 10. This allows the cushion member 100 to be easily attached and detached.

[0055] Furthermore, since the cushion member 100 can be easily attached and detached, if the cushion member 100 becomes soiled, it can be easily removed and washed or replaced. Furthermore, by preparing a plurality of cushion members 100 with different colors, patterns, hardness, etc., the cushion member 100 can be easily replaced according to the preference of the person sitting on it.

[0056] 10(a) to 10(c), by preparing a cushion member 100 that includes planar heaters 71A, 71B, fans 72A, 72B, vibrators 73A, 73B, etc., it is possible to add a heating function, a ventilation function, a massage function, etc. to the vehicle seat S. Furthermore, because the cushion member 100 can be easily attached and detached, it is easy to replace the cushion member 100 with one having a different function, and the functions added to the vehicle seat S can be easily changed.

[0057] Furthermore, recess 10 has inner surfaces 11A to 11D, 12A to 12D that sandwich cushion member 100 when cushion member 100 is fitted in recess 10, so cushion member 100 fitted in recess 10 can be held firmly.

[0058] Furthermore, since the vehicle seat S is provided with the retaining mechanism 60, it is possible to prevent the backrest cushion 120 fitted into the backrest recess 12 from sliding down. More specifically, the backrest cushion 120 fitted into the backrest recess 12 is caught on the hooking portion 61, thereby preventing the lower end of the backrest cushion 120 from sliding down and shifting forward.

[0059] Furthermore, the cushion member 100 has a handle 130 that can be hooked by a person's hand and held, so that the cushion member 100 can be easily carried after being removed from the seat body S0. Furthermore, the ease of carrying the cushion member 100 allows it to be used at the destination where it is carried.

[0060] Furthermore, cushion member 100 has seat cushion 110 and backrest cushion 120, and handle 130 is provided to connect seat cushion 110 and backrest cushion 120, so cushion member 100 can be carried by holding handle 130 with seat cushion 110 and backrest cushion 120 stacked on top of each other. This makes cushion member 100, which has seat cushion 110 and backrest cushion 120, compact and easy to carry.

[0061] Furthermore, when the cushion member 100 is attached to the seat body S0, the handle 130 is arranged to be positioned between the left and right child seat attachment parts 50, so that the handle 130 does not get in the way when attaching a child seat to the vehicle seat S having the cushion member 100 attached to the seat body S0.

[0062] In addition, since the seat cushion 110 and the back cushion 120 have substantially the same shape and size, the cushion member 100 can be made more compact by stacking the seat cushion 110 and the back cushion 120. This makes it easier to carry the cushion member 100 having the seat cushion 110 and the back cushion 120.

[0063] Furthermore, since the seat cushion 110 and the back cushion 120 have substantially the same shape and size, the seat cushion 110 and the back cushion 120 can be attached to the seat body S0 interchangeably. Furthermore, when the cushion member 100 is removed from the seat body S0 and carried to a destination for use, the seat cushion 110 and the back cushion 120 can be used while remaining stacked.

[0064] Although one embodiment of the invention has been described above, the present invention is not limited to the above embodiment and can be practiced by making appropriate modifications as exemplified below. Note that, in the following, the same components as those in the above embodiment are given the same reference numerals and their description will be omitted.

[0065] In the above embodiment, the hook portion 61 of the holding mechanism 60 is provided so as to cover a part of the lower portion of the backrest recess 12 when viewed from the front side, but this is not limited thereto, and the hook portion may be provided so as to cover the entire lower portion of the backrest recess 12 when viewed from the front side. Moreover, the hook portion may be made of a member that constitutes the cover and may be provided integrally with the cover.

[0066] In addition, in the above embodiment, the holding mechanism 60 has the hook portion 61, but the present invention is not limited to this.

[0067] For example, as shown in Fig. 6, the holding mechanism 60 may have an engaging portion 62A and an engaged portion 62B. The engaging portion 62A is a concave portion provided on the left and right side surfaces of the backrest cushion 120. The engaged portion 62B is a convex portion provided on the left and right inner surfaces 12A, 12B of the backrest recess 12 formed in the backrest S2. The engaging portion 62A engages with the engaged portion 62B when the backrest cushion 120 is fitted into the backrest recess 12.

[0068] According to this configuration, when the backrest cushion 120 is fitted into the backrest recess 12, the engaging portion 62A and the engaged portion 62B engage with each other, thereby preventing the backrest cushion 120 from sliding down.

[0069] In the modified example shown in FIG. 6, the engaging portion 62A of the cushion member 100 is concave and the engaged portion 62B of the backrest S2 is convex, but this is not limiting. For example, the engaging portion may be convex and the engaged portion may be concave. Also, multiple pairs of engaging portions and engaged portions may be provided on each side, rather than just one pair. The engaging portion and engaged portion may have a shape that combines concaves and convexes. The engaging portion and engaged portion may have different convex and convex shapes on the left and right. The engaging portion may be provided on the back surface of the backrest cushion 120, and the engaged portion may be provided on the bottom surface of the backrest recess 12.

[0070] 7, the holding mechanism 60 may have a configuration including a first magnetic member 63A and a second magnetic member 63B. A plurality of first magnetic members 63A are provided on the backrest S2. The first magnetic members 63A are fixed between the bottom surface of the pad recess 32A of the backrest pad 32 and the backrest cover 42.

[0071] A plurality of second magnetic members 63B are provided on the backrest cushion 120. The plurality of second magnetic members 63B are respectively provided at positions facing the corresponding first magnetic members 63A when the backrest cushion 120 is fitted into the backrest recess 12. The second magnetic members 63B are provided in a fixed state between the back surface of the backrest cushion pad 121 and the backrest cushion surface 122 of the backrest cushion 120.

[0072] One of the first magnetic member 63A and the second magnetic member 63B is made of a permanent magnet, and the other is made of a ferromagnetic material such as a permanent magnet or iron. As a result, the second magnetic member 63B is attracted to the first magnetic member 63A by magnetic force when the backrest cushion 120 is fitted in the backrest recess 12.

[0073] According to this configuration, when the backrest cushion 120 fits into the backrest recess 12, the second magnetic member 63B is attracted to the first magnetic member 63A by magnetic force, thereby preventing the backrest cushion 120 from sliding down.

[0074] Alternatively, the second magnetic member may be provided on the side surface of the backrest cushion 120, and the first magnetic member may be provided on the inner surface of the backrest recess 12.

[0075] 8, the holding mechanism 60 may also have a friction member 64. The friction member 64 is provided on the backrest cushion 120 and the backrest S2. More specifically, the friction member 64 is a strip-shaped member made of rubber, felt, or the like, and has a first friction member 64A and a second friction member 64B. The first friction member 64A is provided on the left and right side surfaces of the backrest cushion 120, and the second friction member 64B is provided on the left and right inner surfaces 12A, 12B of the backrest recess 12.

[0076] The first friction member 64A and the second friction member 64B generate frictional forces between the left and right side surfaces of the backrest cushion 120 and the left and right inner surfaces 12A, 12B of the backrest recess 12 formed in the backrest S2, thereby preventing the backrest cushion 120 fitted into the backrest recess 12 from sliding down.

[0077] According to this configuration, when the backrest cushion 120 fits into the backrest recess 12, a frictional force is generated between the backrest cushion 120 and the backrest S2, thereby preventing the backrest cushion 120 from sliding down.

[0078] The first friction member may be provided on the rear surface of the backrest cushion 120, and the second friction member may be provided on the bottom surface of the backrest recess 12. Also, the friction member may be provided on only one of the backrest cushion 120 and the backrest S2.

[0079] 9, the retaining mechanism 60 may have a hook-and-loop fastener 65 consisting of a first fastener member 65A and a second fastener member 65B. The first fastener member 65A and the second fastener member 65B are formed in a strip shape and are detachable from each other. A plurality of first fastener members 65A are provided on the backrest S2. The first fastener members 65A are provided on the left and right sides of the bottom surface of the backrest recess 12, respectively.

[0080] A plurality of second fastener members 65B are provided on the backrest cushion 120. The plurality of second fastener members 65B are respectively provided at positions facing the corresponding first fastener members 65A when the backrest cushion 120 is fitted into the backrest recess 12. The second fastener members 65B are detachable from the first fastener members 65A, and attach to the corresponding first fastener members 65A when the backrest cushion 120 is fitted into the backrest recess 12.

[0081] According to this configuration, when the backrest cushion 120 is fitted into the backrest recess 12, the fastener members 65A, 65B stick together, thereby preventing the backrest cushion 120 from sliding down.

[0082] Alternatively, the second fastener member may be provided on the side surface of the backrest cushion 120, and the first fastener member may be provided on the inner surface of the backrest recess 12.

[0083] The holding mechanism may also be configured by combining two or more of the configurations of the above-described embodiment and the modified examples shown in Figures 6 to 9. That is, the holding mechanism 60 may be configured to include two or more of the hooking portion 61, the engaging portion 62A and the engaged portion 62B, the first magnetic member 63A and the second magnetic member 63B, the friction member 64, and the hook-and-loop fastener 65.

[0084] The holding mechanism may be provided not only in the backrest but also in the seat portion. For example, if the configurations of the modified examples shown in Fig. 7 and Fig. 9 are also provided in the seat portion S1, the seat portion cushion 110 and the backrest cushion 120 may be arranged to be attracted to each other by magnetic force or attached by hook-and-loop fasteners when the cushion member 100 is in the portable state (see Fig. 2(b)). Furthermore, as long as the cushion member is firmly held to the seat body by fitting into the recess and does not slip, the vehicle seat may be configured without a holding mechanism.

[0085] As shown in FIG. 10(a), the cushion member 100 may further include an electrical component 70, a battery 80 for supplying power to the electrical component 70, and electric wires 91 and 92.

[0086] The electrical components 70 are, for example, planar heaters 71A and 71B. The heater 71A is provided on the seat cushion 110, and the heater 71B is provided on the back cushion 120. The battery 80 is provided in the seat cushion 110. The battery 80 may be a rechargeable battery. Also, the battery 80 may be replaceable.

[0087] The electric wire 91 is an electric wire that connects the battery 80 and the electrical component 70 (heater 71A) provided in the seat cushion 110, and is provided in the seat cushion 110.

[0088] The electric wire 92 connects the battery 80 and the electrical component 70 (heater 71B) provided on the backrest cushion 120. The electric wire 92 has a first electric wire 92A that is provided on the seat cushion 110, a second electric wire 92B that is provided on the backrest cushion 120, and a third electric wire 92C that connects the first electric wire 92A and the second electric wire 92B. The third electric wire 92C is provided to pass through a handle 130 that connects the seat cushion 110 and the backrest cushion 120.

[0089] The electrical components 70 provided on the cushion member 100 are not limited to the heaters 71A and 71B shown in Fig. 10(a). For example, as shown in Fig. 10(b), they may be fans 72A and 72B for cooling or the like, or as shown in Fig. 10(c), they may be vibrators 73A and 73B for generating vibrations.

[0090] According to this configuration, the cushion member 100 has the electric wires 91 and 92, and the third electric wire 92C can be neatly arranged.

[0091] Furthermore, by providing the cushion member 100 with electrical components 70 and a battery 80 connected by electric wires 91, 92, when the cushion member 100 is attached to the seat body S0, it is possible to add a heating function, a ventilation function, a massage function, etc. to the vehicle seat S afterward. Furthermore, when the cushion member 100 is detached from the seat body S0, these functions can be used wherever the cushion member 100 is carried.

[0092] The electrical components provided in the seat cushion 110 and the electrical components provided in the backrest cushion 120 do not have to be the same type of electrical components, and may be different types of electrical components. For example, the seat cushion 110 may be provided with a fan, and the backrest cushion 120 with a heater. The electrical components provided in the seat cushion 110 do not have to be of one type, but may be of two or more types. For example, the seat cushion 110 may be provided with both a heater and a fan. The same applies to the electrical components provided in the backrest cushion 120.

[0093] The battery may be provided in the back cushion 120 instead of the seat cushion 110, or may be provided in both the seat cushion 110 and the back cushion 120. The electric wire 92 may be a continuous electric wire, or may be a plurality of electric wires, for example, a first electric wire 92A, a second electric wire 92B, and a third electric wire 92C, which are separate members, connected together.

[0094] In the above embodiment, the handle 130 of the cushion member 100 is provided so as to be positioned between the left and right child seat attachment portions 50 when the cushion member 100 is attached to the seat main body S0, but this is not limiting. For example, as shown in Fig. 11(a), the handle 230 may be provided so as to cover the left and right child seat attachment portions 50 when the cushion member 100 is attached to the seat main body S0.

[0095] More specifically, the left and right child seat attachment portions 50 are arranged in positions that fit within the width of the seat cushion 110 and the backrest cushion 120 in the left-right direction. As shown in FIGS. 11(b) and 11(c), the left-right width of the handle 230 is approximately the same as the left-right width of the seat cushion 110 and the backrest cushion 120, and the handle 230 is provided across the entire width of the seat cushion 110 and the backrest cushion 120 in the left-right direction. As a result, when the cushion member 100 is attached to the seat main body S0, the handle 230 covers the left and right child seat attachment portions 50. The handle 230 has holes 131 for holding hands.

[0096] According to this configuration, it is possible to realize specifications in which the child seat cannot be attached to the vehicle seat S unless the cushion member 100 is removed from the seat body S0.

[0097] Although not shown, the handle may be provided so as to cover only one of the left and right child seat attachment portions 50 when the cushion member 100 is attached to the seat body S0.

[0098] In the above embodiment, the vehicle seat S is a seat having a child seat mounting portion 50, such as a second-row seat or a third-row seat of an automobile, but is not limited to this. For example, the vehicle seat may be a seat that does not have a child seat mounting portion, such as a driver's seat or a passenger seat of an automobile.

[0099] In the above embodiment, the seat cushion 110 and the back cushion 120 have substantially the same shape and size, but this is not limiting. For example, the seat cushion and the back cushion may have substantially the same shape but different sizes, or may have substantially the same size but different shapes. Furthermore, the seat cushion and the back cushion may have different shapes and sizes.

[0100] In the above embodiment, the cushion member 100 has both the seat cushion 110 that is detachable from the seat surface S10 of the seat S1 and the back cushion 120 that is detachable from the seat surface S20 of the backrest S2, but this is not limiting. For example, as shown in Fig. 12(a), the cushion member 100 may have only the seat cushion 110 that is detachable from the seat surface S10 of the seat S1 (seat recess 11). In the modified example shown in Fig. 12(a), only the seat S1 has a recess (seat recess 11) formed in part of the seat surface S10, and no recess for attaching or detaching the cushion member is formed in the seat surface S20 of the backrest S2.

[0101] 12(b), the cushion member 100 may have only a backrest cushion 120 that is detachable from the seat surface S20 (backrest recess 12) of the backrest S2. In the modified example shown in FIG. 12(b), only the backrest S2 has a recess (backrest 12) formed in part of the seat surface S20, and no recess for attaching or detaching the cushion member is formed in the seat surface S10 of the seat portion S1.

[0102] In addition, when the cushion member 100 has a configuration including only one of the seat cushion 110 and the back cushion 120, the handle 330 does not connect the seat cushion and the back cushion, as shown in Fig. 13(a). The handle 330 is a substantially U-shaped member made of, for example, fabric or leather, and is provided connected to the vicinity of the end of the back surface of the seat cushion 110 or the back cushion 120. The handle 330 may be configured to be foldable so as to be attached to the back surface of the cushion member 100, as shown by the imaginary lines, when attaching the cushion member 100 to the seat main body S0, for example.

[0103] In the above embodiment, the handle 130 has a hole 131 for hooking a hand, but the present invention is not limited to this. For example, as shown in Fig. 13(b), the handle 430 provided on the back surface of the seat cushion 110 or the back cushion 120 may have a recess 431 for hooking a hand.

[0104] In the above embodiment, the seat is exemplified as a vehicle seat S mounted in an automobile, but is not limited thereto. For example, the seat may be a vehicle seat mounted in a vehicle other than an automobile, specifically, a railroad car, a ship, an airplane, etc. Furthermore, the seat may be a seat used in a home, a seat installed in a facility, etc.

[0105] Furthermore, in the above embodiment, the cushion member 100 was detachable from the recess 10 formed in a part of the seat surface of the vehicle seat S, but the cushion member can be configured to be detachable from the seat surface of a seat that does not have a recess formed therein.

[0106] Furthermore, in the above embodiment, the cushion member 100 has the handle 130, but the cushion member may be configured without a handle.

[0107] Furthermore, the elements described in the above-described embodiment and modified examples may be implemented in any combination. [Explanation of symbols]

[0108] 10 recess 11A~11D,12A~12D Inner side 12 Backrest recess 30 pads 31A, 32A Pad recess 40 Epidermis 60 Retention mechanism 61 Latch part 100 cushion member 120 Backrest Cushion C Cushion cover P cushion pad S vehicle seat S0 seat body S1 seat S2 Backrest S10, S20 seat

Claims

[Claim 1] A seat comprising a seat body having a seat portion on which a person sits and a backrest, At least one of the seat and the backrest has a recess formed in a part of the seat surface, The seat further comprises a cushion member that is detachable from the recess and fits into the recess when attached.

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