Vehicle seat

Abstract

To provide a vehicle seat that is able to stably operate a movable body mounted in a seat body.SOLUTION: A vehicle seat includes: a seat back 2; and a movable body 30 that is mounted in the seat back 2 and is movable to project a side part of the seat back 2 toward a seated person side (a seat front side). A back frame 20 includes: back side frames 21 disposed on left and right sides in a seat width direction and extending vertically; an upper frame 22 connecting upper parts of the left and right back side frames 21; a second connection frame 26 disposed at a position different from the upper frame 22 and connecting the left and right back side frames 21; and a connection member 27 connecting the upper frame 22 and the second connection frame 26. The movable body 30 is mounted on the connection member 27 and extends outside in the seat width direction from the connection member 27.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat having a movable body that is movable to project a part of the seat body toward a seat occupant from a normal position. [Background technology]

[0002] Conventionally, there has been known a vehicle seat that is equipped with a movable body (e.g., a shoulder support member) that is attached inside the seat body on which the occupant sits and that can move to protrude a part of the seat body (e.g., a side portion) toward the occupant from a normal position (see, for example, Patent Document 1). By providing this movable body, the holding ability of the vehicle seat can be improved according to the physique and preferences of the seated occupant. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-148235 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a vehicle seat such as that described in Patent Document 1, there has been a demand for more stable operation of the movable body (shoulder support member) for protruding the side portion of the seat body toward the seated occupant, and also for the arrangement of components including the movable body in the vehicle seat as compactly as possible.

[0005] In addition, when the movable body protrudes the side portion of the seat body toward the occupant, wrinkles or folds may unintentionally occur on the surface of the seat body (specifically, in the upholstery material), which may detract from the appearance of the vehicle seat. For example, when the movable body protrudes the side portion of the seat body toward the occupant, there was a risk that wrinkles or folds in the upholstery material would occur noticeably at the boundary between the center and side portions of the seat body (specifically, the portion corresponding to the upholstery hanging groove).

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat that is capable of stably operating a movable body attached to the seat body. Another object of the present invention is to provide a vehicle seat that allows components of the vehicle seat to be arranged compactly. Another object of the present invention is to provide a vehicle seat that is capable of preventing wrinkles and sagging on the surface of the seat body even when a portion of the seat body protrudes toward the seat occupant. Another object of the present invention is to provide a vehicle seat that is capable of suppressing the occurrence of wrinkles and sagging of the upholstery material at the boundary between the center and side portions of the seat body (the portion corresponding to the upholstery hanging groove). [Means for solving the problem]

[0007] The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat comprising a seat body on which an occupant sits, and a movable body attached inside the seat body and movable to cause a part of the seat body to protrude towards the occupant, wherein the seat body comprises a seat frame which serves as a skeleton, the seat frame having side frames arranged on the left and right sides in the width direction of the seat and extending in a predetermined direction, a connecting frame connecting the ends of the left and right side frames in the extending direction, a second connecting frame which is arranged at a different position in the extending direction of the side frames and connects the left and right side frames, and a connecting member which connects the connecting frame and the second connecting frame, and the movable body is attached to the connecting member. With the above configuration, it is possible to realize a vehicle seat that allows stable operation of the movable body attached to the seat body. Specifically, the movable body is attached to a connecting member, which is a component part of the seat frame with a relatively high rigidity. Therefore, even if a load is applied to the movable body by a seat occupant, the deformation of the movable body can be suppressed. As a result, the movable body can be operated stably.

[0008] In this case, the seat body is constructed by placing a cushion material on the seat frame and covering it with a skin material, and the movable body is provided on the back surface of the cushion material at the side portion of the seat body in the seat width direction, movable to protrude the side portion of the seat body toward the seat occupant, and attached to the portion of the connecting member to which the second connecting frame is connected. With the above-described configuration, the movable body is attached to a portion of the seat frame that has higher rigidity, and therefore the movable body can be operated with greater stability.

[0009] In this case, the seat frame has a back frame that forms the skeleton of the seat back, the side frames are back side frames extending in the vertical direction, the connecting frame is an upper frame that connects the upper ends of the left and right back side frames, and the connecting member extends in the vertical direction and spans between the upper frame and the second connecting frame. The above-mentioned configuration allows the movable body to be stably moved in the seat back, and also allows the components of the vehicle seat (the movable body, the connecting member) to be compactly arranged in the seat back.

[0010] In this case, the movable body is arranged on the left and right sides of the back frame in the seat width direction, and the left and right movable bodies are respectively attached to the connecting members provided on the left and right sides of the back frame and extend so as to protrude outward in the seat width direction from the connecting members. With the above-described configuration, the movable body can be compactly arranged on the side portion of the seat back, and the movable body can be operated in an optimal manner.

[0011] In this case, it is preferable that the connecting member has a support surface that supports the movable body, and that the support surface extends along the extension direction of the movable body to support the movable body. With the above-described configuration, the movable body can be operated more stably.

[0012] In this case, it is preferable that the movable body has a plurality of bags that expand when fluid is sealed inside, the plurality of bags being arranged at different positions in the front-to-rear direction of the seat and each being of a different size. With the above-described configuration, by inflating a plurality of bags having different positions and sizes, it is possible to adjust the protruding direction and protruding amount of the seat back caused by the movable body. Furthermore, with the above-described configuration, by adjusting the protruding direction and protruding amount of the side portion of the seat back, it is possible to prevent the occurrence of wrinkles and folds in the covering material of the seat back.

[0013] In this case, the movable body has a base member supported by the connecting member, a plurality of bag bodies arranged at a position forward of the base member and supported by the base member, and a rotating member arranged at a position forward of the base member and attached so as to be rotatable relative to the base member via a pivot axis, and the plurality of bag bodies are arranged between the base member and the rotating member, and the rotating member rotates so as to protrude the side portion toward the front of the seat by the plurality of bag bodies expanding. With the above-mentioned configuration, the movable body is suitably supported by the connecting member. As a result, the movable body's movable movement (inflation and deployment of the plurality of bags) can be stabilized. In addition, the stabilization of the movable body's movable movement can also be adjusted to suppress the occurrence of wrinkles and sagging in the cover material of the seat back. Furthermore, by providing the rotating member as described above, the movable body can be made to move more stably.

[0014] In this case, the back frame is attached to the upper frame and has a pillar mounting member for mounting a pillar that supports the main body of the headrest, and the connecting member is preferably positioned at a position outer than the pillar mounting member in the seat width direction. The above-described configuration can suppress interference between the movable body and the pillar, and can also suppress an increase in size of the vehicle seat in the front-rear direction.

[0015] In this case, the back frame has a support plate that supports the seated occupant and a second wire member that extends in the vertical direction and connects the second connecting frame and the support plate, and the connecting member is preferably positioned more inward than the second wire member in the seat width direction. With the above-described configuration, interference between the movable body and the second wire member can be suppressed, and an increase in size of the vehicle seat in the front-rear direction can also be suppressed.

[0016] In this case, a skin hanging groove for hanging the end of the skin material is formed on the surface of the cushion material, and the skin hanging groove is arranged on the left and right sides in the seat width direction, and has a hanging groove side portion extending in the up and down direction and a hanging groove upper portion extending in the seat width direction so as to connect the upper parts of the left and right hanging groove side portions, and the connecting member is preferably arranged at a position higher than the hanging groove upper portion. With the above-mentioned configuration, the movable body and the connecting member are disposed at positions spaced apart from the up-down direction from the up-down groove, which makes it possible to prevent the up-down material of the seat back from wrinkling or becoming sagging. To explain in more detail, it is known that when the movable body projects the side portion of the seat body toward the seat occupant, wrinkles and folds are generally formed in the upholstery material around the upholstery hanging groove. Therefore, it is possible to take care to prevent wrinkles and folds from forming in the upholstery material around the groove. Effect of the Invention

[0017] According to the present invention, it is possible to realize a vehicle seat that is capable of stably moving a movable body attached to a seat body. Furthermore, according to the present invention, the movable body is attached to a portion of the seat frame that has higher rigidity, which allows the movable body to be operated more stably. Furthermore, according to the present invention, the components of the vehicle seat (the movable body, the connecting member) can be arranged compactly in the seat back. Furthermore, according to the present invention, the movable body can be arranged compactly on the side portion of the seat back, and the movable body can be operated in an optimal manner. According to the present invention, by inflating a plurality of bags having different positions and sizes, it is possible to adjust the protruding direction and the protruding amount of the seat back caused by the movable body. Also, by adjusting the protruding direction and the protruding amount of the side part of the seat back, it is possible to prevent the occurrence of wrinkles and sagging in the covering material of the seat back. According to the present invention, the movable body is preferably supported by the connecting member. As a result, the movable body's movement (inflation and deployment of the plurality of bags) can be stabilized. In addition, the seat back cover material can be adjusted to prevent wrinkles and sagging. Furthermore, according to the present invention, it is possible to suppress interference between the movable body and the pillar, and between the movable body and the second wire member, and to suppress an increase in size of the vehicle seat in the front-rear direction. Furthermore, according to the present invention, the occurrence of wrinkles and folds in the cover material of the seat back can be suppressed, particularly in the vicinity of the cover hanging groove. [Brief description of the drawings]

[0018] [Figure 1] 1 is an external perspective view of a vehicle seat according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing a seat frame that serves as a framework. [Diagram 3] FIG. [Figure 4]FIG. 11 is a front view showing the vehicle seat, illustrating the positional relationship between the movable body and the connecting member and the skin hanging groove. [Figure 5A] FIG. 2 is a VV cross-sectional view of FIG. 1, illustrating a state in which the movable body is not moved and the side portion of the seat back is in a "normal position." [Figure 5B] 13 is a diagram illustrating a state in which the movable body is movable and the side portion of the seat back is in a "protruding position." FIG. [Figure 6A] FIG. 13 is a diagram showing modified example 1 of the movable body, illustrating a state in which the side portion of the seat back is in the "normal position." [Figure 6B] 11 is a diagram illustrating a state in which the side portion of the seat back is in a "protruding position." FIG. [Figure 7A] FIG. 13 is a diagram showing modified example 2 of the movable body, illustrating the state in which the side portion of the seat back is in the "normal position." [Figure 7B] 11 is a diagram illustrating a state in which the side portion of the seat back is in a "protruding position." FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 7A and 7B. This embodiment relates to an invention for a vehicle seat which is mainly characterized in that the movable body is attached to the inside of the seat body and is movable to protrude the side portion of the seat body in the seat width direction towards the seat occupant, the seat frame having side frames arranged on the left and right sides in the seat width direction and extending in a predetermined direction, a connecting frame connecting the ends of the left and right side frames in the extending direction, a second connecting frame arranged at a position different from the connecting frame and connecting the left and right side frames, and a connecting member connecting the connecting frame and the second connecting frame, and the invention relates to a vehicle seat which is mainly characterized in that the movable body is attached to the connecting member. In addition, the side of the vehicle seat on which a seat occupant sits relative to the seat back is the front side of the seat.

[0020] As shown in FIG. 1, the vehicle seat S of this embodiment is a vehicle seat, and includes a seat body having a seat cushion 1, a seat back 2, and a headrest 3, a movable body 30 (shoulder support member) attached to the inside of the seat back 2 and movable to move the side portion 2B of the seat back 2 between a "normal position" and a "protruding position" in which the side portion 2B protrudes toward the seat occupant from the normal position, and an operating device 40 (fluid supply device) that operates to move the movable body 30.

[0021] As shown in FIG. 1, the seat cushion 1 is a seating portion that supports a seated person from below, and is configured by placing a cushion material 1a on a cushion frame 10 shown in FIG. 2, which serves as a skeleton, and covering it with a cover material 1b. The seat cushion 1 is composed of a central portion 1A located in the center in the seat width direction, and left and right side portions 1B (side bolster portions) located outside the central portion 1A in the seat width direction. The cushion material 1a is a pad member made of urethane foam or the like. On the surface of the cushion material 1a, left and right skin hanging grooves 1aa are formed which extend in the front-rear direction of the seat so as to separate the central portion 1A from the left and right side portions 1B.

[0022] As shown in Figs. 1 and 4, the seat back 2 is a backrest portion that supports the back of a seated occupant from behind, and is configured by placing a cushion material 2a on a back frame 20 shown in Fig. 2, which serves as the skeleton, and covering it with a skin material 2b. The seat back 2 is composed of a central portion 2A located in the center in the seat width direction, and left and right side portions 2B (side bolster portions) located outside the central portion 2A in the seat width direction. On the surface of the cushion material 2a, there are formed left and right hanging groove side portions 2aa (skin hanging grooves) extending in the vertical direction so as to separate the central portion 2A from the left and right side portions 2B, and a hanging groove upper portion 2ab (skin hanging groove) extending in the seat width direction so as to connect the upper portions of the left and right hanging groove side portions 2aa.

[0023] As shown in Figs. 1 and 4, the headrest 3 is a head rest that supports the head of an occupant from behind, and is configured by placing a cushion material 3a on a pillar 3c that serves as a core material and covering it with a skin material 3b. As shown in FIG. 4, a pillar mounting member 29 for mounting a pillar 3c that supports the main body of the headrest 3 is attached to the upper portion of the back frame 20. As shown in FIG.

[0024] As shown in FIG. 2, the cushion frame 10 is a substantially rectangular frame-like body and is mainly composed of cushion side frames 11 arranged on the left and right sides, a plate-shaped pan frame 12 (mounting frame) mounted on the front end portion of each cushion side frame 11, a rear connecting frame 13 connecting the rear portions of each cushion side frame 11, and a number of elastic springs 14 (elastic support members) hooked onto the pan frame 12 and the rear connecting frame 13 and extending in a snake-like shape in the fore-and-aft direction of the seat.

[0025] The cushion side frame 11 is a plate-shaped frame that is long in the front-rear direction of the seat. A reclining device 4 is attached to the rear portion of the cushion side frame 11, and a rail device 6 is attached to its lower portion via a height link device 5.

[0026] As shown in Figures 2 to 4, the back frame 20 is a roughly rectangular frame-like body and is mainly composed of back side frames 21 arranged on the left and right sides, an inverted U-shaped upper frame 22 connecting the upper end portions of each back side frame 21, a plate-shaped lower frame 23 connecting the lower end portions of each back side frame 21, a plurality of wire members 24 (elastic wires) extending in the vertical direction and hooked onto the lower frame 23, and a support plate 25 held by the plurality of wire members 24 and supporting a seated occupant. In addition, the back frame 20 is positioned at a different position from the upper frame 22 in the extension direction of the back side frame 21, and is equipped with a second connecting frame 26 (cross member) that connects the upper portions of the left and right back side frames 21, a connecting member 27 (connecting bracket) that connects the upper frame 22 and the second connecting frame 26, and a second wire member 28 that extends in the vertical direction and connects the second connecting frame 26 and the support plate 25. Furthermore, the back frame 20 is attached to a central portion of the upper frame 22 in the seat width direction, and further includes a pillar attachment member 29 for attaching the pillar 3c of the headrest 3.

[0027] The back side frame 21 is a sheet metal member that extends in the vertical direction and has a generally C-shaped cross section. In the above configuration, the back frame 20 is capable of rotating relative to the cushion frame 10.

[0028] The connecting member 27 is a bracket that extends in the vertical direction and has a generally rectangular cross section, and is disposed between the front surface of the upper frame 22 and the front surface of the second connecting frame . The connecting members 27 are disposed on the left and right sides at a predetermined interval in the seat width direction. Left and right movable bodies 30 are attached to the front surfaces of the left and right connecting members 27, respectively.

[0029] In the above configuration, as shown in FIG. 3, the connecting member 27 is disposed at a position outside the pillar mounting member 29 in the seat width direction. This makes it possible to prevent interference between the movable body 30 attached to the connecting member 27 and the pillar 3c attached to the pillar attachment member 29. It is also possible to prevent the vehicle seat S from becoming large in the front-rear direction.

[0030] In the above configuration, as shown in FIG. 3, the connecting member 27 is disposed on the inside of the second wire member 28 in the seat width direction. This makes it possible to prevent interference between the movable body 30 attached to the connecting member 27 and the second wire member 28. It is also possible to prevent the vehicle seat S from becoming large in size in the front-rear direction of the seat.

[0031] In the above configuration, as shown in FIG. 4, the connecting member 27 is disposed at a position above the skin hanging groove (hanging groove upper portion 2ab). Therefore, the movable body 30 attached to the connecting member 27 and the upholstery hanging groove (hanging groove upper portion 2ab) are disposed at positions spaced apart in the up-down direction. This makes it possible to prevent the upholstery material 2b of the seat back 2 from being wrinkled or flabby. More specifically, when the movable body 30 protrudes the side portion 2B of the seat back 2 toward the front side of the seat, it is known that wrinkles and folds are generally generated in the upholstery material 2b around the upholstery hanging groove. Therefore, it is possible to take care not to generate wrinkles and folds in the upholstery material 2b around the groove.

[0032] As shown in Figures 2-5A and B, the movable body 30 has a bag (air cell) that expands when a fluid is sealed inside, and expands toward the occupant (protruding from the normal position to the protruding position) when compressed air is sealed inside as the fluid, and contracts (returns to the normal position) when the sealed compressed air is released. Specifically, the movable body 30 is a shoulder support member that is attached to the rear surface of the cushion material 2a in the side portion 2B in the upper portion of the seat back 2 and is movable to protrude the side portion 2B toward the seated occupant. The movable bodies 30 are disposed on the left and right at a predetermined interval in the seat width direction, and are attached to the front surface of the connecting member 27. More specifically, they are attached to the overlapping portion of the front surface of the connecting member 27 to which the second connecting frame 26 is connected. The movable body 30 is attached in a folded state.

[0033] The movable body 30 has a generally pentagonal shape that is elongated in the seat width direction, and extends so as to protrude from the connecting member 27 outward in the seat width direction. In detail, the movable body 30 is mainly composed of a base member 31 supported by the connecting member 27 and a plurality of bag bodies 32 that are positioned in front of the base member 31 and supported on the front surface of the base member 31.

[0034] The base member 31 is a plate member that is long in the seat width direction, and is bridged (connected) between the front surface of the connecting member 27 and the front surface of the back side frame 21. The plurality of bags 32 are supported by the base member 31, and when compressed air is enclosed in the bags 32, they can expand toward the front side of the seat from a folded state. The plurality of bags 32 are attached to the base member 31 by attachment members 33 provided on the inner end portion in the seat width direction of the front surface of the base member 31.

[0035] The plurality of bags 32 are arranged at different positions in the seat front-rear direction and the seat width direction, and are configured to have different sizes. More specifically, the plurality of bag bodies 32 is composed of three bag bodies, and the first bag body 32a, which is located the furthest in front of the seat, is configured to have the smallest capacity compared to the other bag bodies among the plurality of bag bodies 32. The second bag body 32b is configured to have the largest capacity, and the third bag body 32c is configured to have a medium capacity. With the above-described configuration, by inflating a plurality of bags 32 having different positions and sizes, it is possible to adjust the protruding direction and protruding amount of the seat back 2 (side portion 2B). In addition, by adjusting the protruding direction and the protruding amount of the side portion 2B of the seat back 2, the occurrence of wrinkles and folds in the covering material 2b of the seat back 2 can be suppressed.

[0036] In the above configuration, the movable body 30 can move (inflate) to move the side portion 2B (shoulder portion) of the seat back 2 from the "normal position" shown in Fig. 5A to the "protruding position" shown in Fig. 5B. This will be described in detail below.

[0037] FIG. 5A is a cross-sectional view of the seat back 2, showing a state in which the side portion 2B of the seat back 2 is in the "normal position." The movable body 30 is disposed between the back frame 20 and the covering material 2b in the seat front-rear direction. Specifically, the movable body 30 is attached to the front surface of the connecting member 27, and is disposed on the rear surface of the cushion material 2a.

[0038] Inside the seat back 2, at a position rearward of the cushion material 2a, an actuator 40 (fluid supply device) that supplies compressed air to the plurality of bags 32 (air cells) is disposed. The actuator 40 is attached to a predetermined position in the center of the back frame 20. Specifically, it is mainly composed of an air pump 41 that can supply (intake) and discharge (exhaust) compressed air, and an air pipe 42 that connects the air pump 41 and the movable body 30 (bag body 32).

[0039] The actuator 40 can supply compressed air to the bag body 32 or discharge compressed air from the bag body 32 by receiving a predetermined control signal from a control device (not shown), for example. At this time, the control device may transmit the control signal upon receiving a selection of a predetermined user operation by the seated occupant. This makes it possible to adjust the range of motion of the movable body 30 according to the physique of the seated occupant.

[0040] FIG. 5B is a diagram showing a state in which the movable body 30 (the bag body 32) protrudes toward the front of the seat and the side portion 2B of the seat back 2 moves from the "normal position" to the "protruding position." Specifically, when compressed air is supplied from the actuator 40, the folded bag body 32 expands and unfolds toward the front of the seat, and the side portion 2B moves toward the front of the seat. As a result, the side portion 2B of the seat back 2 moves to the "protruding position." When the operating device 40 discharges the compressed air from inside the bag body 32, the inflated bag body 32 contracts and the side portion 2B moves downward toward the rear of the seat. As a result, the side portion of the seat back 2 returns from the "protruding position" to the "normal position."

[0041] In the above configuration, as shown in FIG. 5B, the movable body 30 (the bag body 32) is configured so that the side portions of the seat back 2 protrude forward of the seat and inward in the seat width direction. In particular, the left and right shoulder portions of the seat back 2 are configured to protrude forward of the seat and diagonally downward inward in the seat width direction. This can improve the seating feeling for the seat occupant.

[0042] <Modification 1 of Movable Body> Next, a first modified example of the "movable body" will be described with reference to Figs. 6A and 6B. It should be noted that explanations of the contents that overlap with those of the vehicle seat S described above will be omitted. The movable body 130 is mainly composed of a base member 131, a rotating member 133 that is positioned further forward in the seat than the base member 131 and is attached so as to be rotatable relative to the base member 131 via a rotating shaft 132, and a bag body 134 that is positioned between the base member 131 and the rotating member 133 and supported on the front surface of the base member 131.

[0043] The base member 131 spans between the front surface of the connecting member 127 and the front surface of the back side frame 121 . The rotation shaft 132 is attached to the inner end in the seat width direction of the front surface of the base member 131. In other words, it is attached to the portion where the base member 131 and the connecting member 127 overlap. The rotating member 133 is attached to the base member 131 so as to be rotatable in the front-rear direction of the seat, and can cause the side portion 102B of the seat back 102 to protrude (push out) toward the front of the seat by rotating toward the front of the seat. When the seat back 102 is in the normal position, the rotating member 133 is disposed at a position shifted toward the base member 131. The rotating member 133 may be biased toward the base member 131 by a biasing spring (biasing member) (not shown).

[0044] The bag body 134 is supported by the base member 131, and when compressed air is enclosed inside, the bag body 134 expands toward the front side of the seat, and can push the rotating member 133 toward the front of the seat. In other words, the rotating member 133 can be rotated toward the front of the seat.

[0045] FIG. 6B is a diagram showing a state in which the movable body 130 (rotating member 133) protrudes toward the front of the seat and the side portion 102B of the seat back 102 moves from the "normal position" to the "protruding position." Specifically, by receiving a supply of compressed air from the operating device 140, the folded bag body 134 expands and unfolds toward the front of the seat, pushing the rotating member 133 toward the front of the seat, and the side portion 102B moves toward the front of the seat. As a result, the side portion 102B moves to the "protruding position."

[0046] <Modification of movable body 2> Next, a second modified example of the "movable body" will be described with reference to Figs. The movable body 230 is composed of a plurality of bags 231 supported on the front surface of the connecting member 227 . The plurality of bags 231 are bridged across the front surface of the connecting member 227 and the front surface of the back side frame 121 . At this time, the connecting member 227 has a support surface 227a that supports the movable body 230 (bag body 231), and the support surface 227a extends along the extension direction of the bag body 231 to support the bag body 231. In other words, the support surface 227a and the bag body 231 are arranged to overlap along the sheet width direction.

[0047] The plurality of bags 231 are made up of three bags, which are arranged at different positions in the seat front-rear direction and the seat width direction, and are configured to have different sizes. The plurality of bags 231 are attached to the connecting member 227 by attachment members 232 provided on the inner end portion of the support surface 227a of the connecting member 227 in the sheet width direction.

[0048] FIG. 7B is a diagram showing a state in which the movable body 230 (the bag body 231) protrudes toward the front of the seat and the side portion 202B of the seat back 202 moves from the "normal position" to the "protruding position." Specifically, the bag body 231 in the folded state expands and unfolds toward the front of the seat, causing the side portion 202B to move toward the front of the seat. As a result, the side portion 202B of the seat back 202 moves to the "protruding position."

[0049] <Other embodiments> In the above embodiment, as shown in FIG. 1, the movable body 30 is attached to the upper part of the seat back 2, but is not particularly limited thereto, and may be attached to the central part of the seat back 2 or to the lower part of the seat back 2. Alternatively, the movable body 30 may be attached to the seat cushion 1.

[0050] In the above embodiment, as shown in FIGS. 5A and 5B, the movable body 30 is configured as a bag (air cell) and the operating device 40 is configured as a fluid supply device, but this is not particularly limited and can be modified. For example, the "movable body" and the "actuating device" may be configured by mechanical mechanisms. Specifically, the "movable member" may be configured to be movable by a link mechanism, a hinge mechanism, or the like, and the "actuating device" may be configured by a motor-type or hydraulic drive device, or the like.

[0051] In the above embodiment, as shown in FIGS. 5A and 5B, the movable body 30 is disposed on the back surface side of the cushion material 2a, but this is not particularly limited and the movable body 30 may be disposed on the front surface side of the cushion material 2a.

[0052] In addition to the above embodiment, the cushion material 2a may have a portion facing the movable body 30 formed with a plurality of through holes penetrating in the front-rear direction of the seat. In this case, it is preferable that the plurality of through holes and the connecting member 27 are provided at positions overlapping each other in the seat width direction. Alternatively, it is preferable that the plurality of through holes are disposed at positions outside the connecting member 27 in the seat width direction. This allows the cushion material 2a to bend easily and favorably, allowing the movable body 30 to operate stably.

[0053] In addition to the above embodiment, it is preferable that the left and right connecting members 27 and the left and right skin hanging grooves (hanging groove side portions 2aa) are provided at positions where they overlap in the seat width direction. Alternatively, it is preferable that the left and right connecting members 27 are disposed at positions outside the left and right skin hanging grooves (hanging groove side portions 2aa) in the seat width direction. This allows the cushion material 2a to bend easily and favorably, allowing the movable body 30 to operate stably.

[0054] In the above embodiment, a vehicle seat used in an automobile has been described as a specific example, however, without being limited thereto, the present invention can be used for various seats such as two-wheeler seats, vehicle seats for trains and buses, seats for vehicles such as airplanes and ships, as well as office chairs for work, wheelchairs, and child seats in shopping carts.

[0055] In this embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0056] S Vehicle seat Sa seat frame 1 seat cushion 1A, 2A central part 1B, 2B, 102B, 202B Side section 1a, 2a, 3a Cushioning material 1aa Epidermis hanging groove 1b, 2b, 3b Skin material 2, 102, 202 Seat back 2aa Hanging groove side part (surface hanging groove) 2ab Hanging groove side part (surface hanging groove) 3 Headrest 3c Pillar 4 Reclining device 5 Height link device 6 Rail device 10 Cushion Frame 11 Cushion side frame 12 Pan Frame 13 Rear connecting frame 14 Elastic spring (elastic support member) 20 Back Frame 21, 121 Backside frame 22 Upper frame (connecting frame) 23 Lower frame 24 Wire material 25 Support Plate 26 Second connecting frame (cross member) 27, 127, 227 Connecting members 227a Support surface 28 Second wire member 29 Pillar mounting material 30 Movable body (shoulder support member) 31 Base material 32 Bag body 32a~32c 1st bag ~ 3rd bag 33 Mounting material 40, 140 Actuator (fluid supply device) 41 Air Pump 42 Air piping 130, 230 Movable body 131 Base material 132 Rotating shaft 133 Rotating member 134 Bag body 231 Bag body 232 Mounting material

Claims

1. A seat body on which an occupant sits; A vehicle seat including: a movable body attached to an inside of the seat body and movable to cause a part of the seat body to protrude toward the seat occupant; The seat body includes a seat frame that serves as a framework, The seat frame includes: Side frames are disposed on the left and right sides in the seat width direction and extend in a predetermined direction; A connecting frame connecting the ends of the left and right side frames in the extension direction; A second connecting frame is disposed at a different position from the connecting frame in the extension direction of the side frames and connects the left and right side frames; a connecting member that connects the connecting frame and the second connecting frame, A vehicle seat, characterized in that the movable body is attached to the connecting member.

2. The seat body is configured by placing a cushion material on the seat frame and covering it with a skin material, The movable body is The cushion is provided on the back surface of the cushion material at the side portion of the seat body in the seat width direction, and is movable to protrude the side portion of the seat body toward the seat occupant, The vehicle seat according to claim 1 , wherein the second connecting frame is attached to a portion of the connecting member to which the second connecting frame is connected.

3. The seat frame has a back frame that serves as a framework for the seat back, The side frame is a back side frame extending in the vertical direction, The connecting frame is an upper frame that connects upper ends of the left and right back side frames, 3. The vehicle seat according to claim 2, wherein the connecting member extends in the vertical direction and spans between the upper frame and the second connecting frame.

4. The movable body is disposed on the left and right sides of the back frame in a seat width direction, The left and right movable bodies are The back frame is attached to the connecting members provided on the left and right sides, 4. The vehicle seat according to claim 3, wherein the connecting member extends so as to protrude outward in a seat width direction.

5. The connecting member has a support surface that supports the movable body, 5. The vehicle seat according to claim 4, wherein the support surface extends along an extension direction of the movable body to support the movable body.

6. the movable body has a plurality of bags that expand when a fluid is sealed therein; 6. The vehicle seat according to claim 3, wherein the plurality of bags are arranged at different positions in a front-rear direction of the seat and have different sizes.

7. The movable body is A base member supported by the connecting member; a plurality of bags disposed in a position forward of the base member and supported by the base member; a rotating member that is disposed at a position forward of the base member and is attached to the base member so as to be rotatable about a rotating shaft, The plurality of bags are disposed between the base member and the rotating member, 7. The vehicle seat according to claim 6, wherein the rotating member rotates so as to cause the side portions to protrude toward a front side of the seat by the plurality of bags expanding.

8. the back frame is attached to the upper frame and has a pillar mounting member for mounting a pillar supporting a main body of a headrest; 8. The vehicle seat according to claim 3, wherein the connecting member is disposed at an outer position than the pillar mounting member in the seat width direction.

9. The back frame is A support plate for supporting a seated person; a second wire member extending in a vertical direction and connecting the second connecting frame and the support plate, 9. The vehicle seat according to claim 3, wherein the connecting member is disposed more inwardly than the second wire member in the seat width direction.

10. a skin hanging groove for hanging an end of the skin material is formed on the surface of the cushion material; The skin hanging groove is A hanging groove side portion is arranged on the left and right sides in the seat width direction and extends in the up and down direction; and a hanging groove upper portion extending in the seat width direction so as to connect upper portions of the left and right hanging groove side portions, 10. The vehicle seat according to claim 3, wherein the connecting member is disposed at a position above an upper portion of the suspension groove.

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