JP2022012670A - Fluid bag device and vehicle seat equipped with fluid bag device - Google Patents

Abstract

[Problem] To diversify the shape of a fluid bag device when inflated. [Solution] A fluid bag device 50 includes a support member 51 having a support surface 51A along a first direction, a fluid bag assembly 52 arranged on the support surface, and a fluid supply device 53 connected to the fluid bag assembly. The fluid bag assembly includes a first fluid bag 56 arranged on the support surface, a second fluid bag 57 having a first connecting portion 61 connected to the first fluid bag at an end on the first side and communicating with the first fluid bag, and a third fluid bag 58 having a second connecting portion 62 connected to the second fluid bag at an end on the first side and communicating with the second fluid bag. When the fluid bag assembly is in a contracted state, a first side edge 61A which is a side edge on the second side of the first connecting portion and a second side edge 62A which is a side edge on the second side of the second connecting portion each extend linearly in different directions when viewed from a direction perpendicular to the support surface. [Selected Figure] FIG. 2

Description

The present invention relates to a fluid bag device and a vehicle seat provided with the fluid bag device.

Patent Document 1 describes a fluid bag device provided inside a seat cushion and a seat back of a vehicle seat. The fluid bag device changes the surface shape of the seat cushion and seat back by expanding. The fluid bag device is formed by connecting a plurality of fluid bags to each other. Each fluid bag is formed by welding the edges of two sheets to each other. In some fluid bag devices, the fluid bags are laminated in the thickness direction and welded to each other at their central portions. This fluid bag device expands in the thickness direction of the fluid bag. Further, in other fluid bag devices, the fluid bags are laminated in the thickness direction and welded to each other at the side edges corresponding to each other. This fluid bag device expands in the circumferential direction around the welded side edge.

Jitsukaisho 63-5846 Gazette

There is a desire to diversify the shape of the fluid bag device when inflated so that it can be adapted to the shape of the seated person. For example, there is a desire to expand the fluid bag device in a plurality of directions, and a desire to change the expansion direction as the expansion progresses.

In view of the above background, it is an object of the present invention to diversify the shape of the fluid bag device at the time of expansion. Another object of the present invention is to provide a vehicle seat provided with a fluid bag device capable of diversifying the shape at the time of expansion.

In order to solve the above problems, one aspect of the present invention is a fluid bag device (50) that is arranged between the frame (20) and the skin material (13, 17) in the vehicle seat (1) and expands and contracts. ), A support member (51) provided on the frame and having a support surface (51A) along the first direction, a fluid bag assembly (52) arranged on the support surface, and the fluid. It has a fluid supply device (53) connected to the bag assembly, one side in the first direction is the first side, the other side is the second side, and the fluid bag assembly is on the support surface. A second fluid bag (56) that has been arranged and has a first coupling portion (61) that is coupled to the first fluid bag at the end on the first side and communicates with the first fluid bag. A third fluid bag (58) having a fluid bag (57) and a second coupling portion (62) coupled to the second fluid bag at the end on the first side and communicating with the second fluid bag. With the first side edge (61A) which is the side edge of the first joint portion on the second side when viewed from a direction orthogonal to the support surface in a state where the fluid bag assembly is contracted. , The second side edge (62A), which is the side edge of the second side of the second coupling portion, extends linearly and extends in different directions from each other.

According to this aspect, since the first side edge and the second side edge extend in different directions from each other, the expansion direction of the second fluid bag and the expansion direction of the third fluid bag can be changed. This makes it possible to diversify the shape of the fluid bag assembly during expansion.

In the above aspect, it is preferable that the second side edge is arranged on the second side of the first side edge.

According to this aspect, the shape of the fluid bag assembly at the time of expansion can be diversified.

In the above aspect, it is preferable that the length of the second fluid bag in the first direction is longer than the length of the third fluid bag in the first direction.

According to this aspect, the shape of the fluid bag assembly at the time of expansion can be diversified.

In the above embodiment, the fluid supply device is connected to the first fluid bag, and the first fluid bag and the second fluid bag are connected by a first communication hole (61B) passing through the first coupling portion. The second fluid bag and the third fluid bag may be connected by a second communication hole (62B) passing through the second coupling portion.

According to this aspect, the connection structure between the air supply device and the fluid bag assembly can be simplified.

In the above aspect, the first fluid bag, the second fluid bag, and the third fluid bag may extend in the first direction.

According to this aspect, the shape of the fluid bag assembly at the time of contraction can be simplified.

In the above embodiment, the first fluid bag may have a tab (56D) protruding laterally, and the tab may be fastened to a side surface of the support member orthogonal to the support surface.

According to this aspect, the support member can be miniaturized, and the fluid bag device can be miniaturized.

Another aspect of the present invention is a vehicle seat (1) having a fluid bag device (50), the seat cushion (3) supporting the occupant's bag and an occupant extending upward from the rear portion of the seat cushion. Each of the support member and the fluid bag assembly is provided with a pair of left and right, and the left and right support members have their respective support surfaces facing forward. The first side is arranged on the left and right parts in the upper part of the seat back so that the first side is on the left and right inside and downward, and when the fluid bag assembly is contracted, the first side edge and the first side edge are viewed from the front. Each of the second side edges may extend downwardly toward the left and right outwards.

According to this aspect, the fluid bag device can inflate the portion of the seat back corresponding to the shoulder of the seated person inward and downward in the left-right direction. Thereby, it is possible to provide a seat back according to the position and shape of the shoulder of the seated person.

In the above aspect, it is preferable that the blower (35) is provided in the central portion of the upper part of the seat back, and the left and right support members are arranged on the left and right sides of the blower.

According to this aspect, the fluid bag device and the blower device can be arranged in the seat back so as not to interfere with each other.

In the above embodiment, the blower body has a blower body (36) provided with an impeller and a duct (37) extending from the blower body, and the blower body is in the upper part of the seat back. It is preferable that the duct is arranged in the central portion and extends vertically on the side of the blower main body, and one of the left and right support members is arranged on the left and right sides of the duct.

According to this aspect, the fluid bag device and the blower device can be arranged in the seat back so as not to interfere with each other.

In the above embodiment, a lumbar support member (31) for supporting the waist of the occupant is provided at the lower portion of the seat back, and the lumbar support member includes a support plate (32) and the support plate as the frame. It is preferable that each of the lower ends of the left and right support members is arranged above the upper end of the support plate.

According to this aspect, the fluid bag device and the lumbar support member can be arranged in the seat back so as not to interfere with each other.

In the above embodiment, the first side airbag (41) is provided on one of the left and right side portions of the seat back, and the second side airbag (42) is provided on the other side of the left and right side portions of the seat back. Each of the first side airbag and the second side airbag extends vertically, and the upper end of the first side airbag is arranged above the upper end of the second side airbag, and is left and right. Each of the lower ends of the support member may be arranged above the upper end of the second side airbag.

According to this aspect, the fluid bag device and the side airbag can be arranged in the seat back so as not to interfere with each other.

In the above aspect, the left and right fluid bag assemblies have left and right outwardly recessed recesses on the left and right inner side edges, and the left and right side portions of the blower are arranged in each of the recesses. It is good.

According to this aspect, the fluid bag device and the blower device can be arranged at high density.

One aspect of the present invention is a fluid bag device (50) that is arranged between a frame (20) and a skin material (13, 17) in a vehicle seat (1) and expands and contracts, and is attached to the frame. A support member (51) provided and having a support surface (51A) along the first direction, a fluid bag assembly (52) arranged on the support surface, and a fluid connected to the fluid bag assembly. A first fluid bag (with a feeder (53), one side in the first direction is the first side and the other side is the second side, and the fluid bag assembly is arranged on the support surface. 56), a second fluid bag (57) having a first coupling portion (61) coupled to the first fluid bag at the end on the first side, and communicating with the first fluid bag, and the above. The end on the first side has a second coupling portion (62) to be coupled to the second fluid bag, and has a third fluid bag (58) communicating with the second fluid bag, and the fluid bag. In the contracted state of the assembly, the first side edge (61A), which is the side edge of the first joint portion on the second side, and the second joint portion, when viewed from a direction orthogonal to the support surface. The second side edge (62A), which is the side edge of the second side, extends linearly and extends in different directions from each other. According to this aspect, since the first side edge and the second side edge extend in different directions from each other, the expansion direction of the second fluid bag and the expansion direction of the third fluid bag can be changed. This makes it possible to diversify the shape of the fluid bag assembly during expansion.

In the above aspect, it is preferable that the second side edge is arranged on the second side of the first side edge. According to this aspect, the shape of the fluid bag assembly at the time of expansion can be diversified.

In the above aspect, it is preferable that the length of the second fluid bag in the first direction is longer than the length of the third fluid bag in the first direction. According to this aspect, the shape of the fluid bag assembly at the time of expansion can be diversified.

In the above embodiment, the fluid supply device is connected to the first fluid bag, and the first fluid bag and the second fluid bag are connected by a first communication hole (61B) passing through the first coupling portion. The second fluid bag and the third fluid bag may be connected by a second communication hole (62B) passing through the second coupling portion. According to this aspect, the connection structure between the air supply device and the fluid bag assembly can be simplified.

In the above aspect, the first fluid bag, the second fluid bag, and the third fluid bag may extend in the first direction. According to this aspect, the shape of the fluid bag assembly at the time of contraction can be simplified.

In the above embodiment, the first fluid bag may have a tab (56D) protruding laterally, and the tab may be fastened to a side surface of the support member orthogonal to the support surface. According to this aspect, the support member can be miniaturized, and the fluid bag device can be miniaturized.

Another aspect of the present invention is a vehicle seat (1) having a fluid bag device (50), the seat cushion (3) supporting the occupant's bag and an occupant extending upward from the rear portion of the seat cushion. Each of the support member and the fluid bag assembly is provided with a pair of left and right, and the left and right support members have their respective support surfaces facing forward. The first side is arranged on the left and right parts in the upper part of the seat back so that the first side is on the left and right inside and downward, and when the fluid bag assembly is contracted, the first side edge and the first side edge are viewed from the front. Each of the second side edges may extend downwardly toward the left and right outwards. According to this aspect, the fluid bag device can inflate the portion of the seat back corresponding to the shoulder of the seated person inward and downward in the left-right direction. Thereby, it is possible to provide a seat back according to the position and shape of the shoulder of the seated person.

In the above aspect, it is preferable that the blower (35) is provided in the central portion of the upper part of the seat back, and the left and right support members are arranged on the left and right sides of the blower. According to this aspect, the fluid bag device and the blower device can be arranged in the seat back so as not to interfere with each other.

In the above embodiment, the blower body has a blower body (36) provided with an impeller and a duct (37) extending from the blower body, and the blower body is in the upper part of the seat back. It is preferable that the duct is arranged in the central portion and extends vertically on the side of the blower main body, and one of the left and right support members is arranged on the left and right sides of the duct. According to this aspect, the fluid bag device and the blower device can be arranged in the seat back so as not to interfere with each other.

In the above embodiment, a lumbar support member (31) for supporting the waist of the occupant is provided at the lower portion of the seat back, and the lumbar support member includes a support plate (32) and the support plate as the frame. It is preferable that each of the lower ends of the left and right support members is arranged above the upper end of the support plate. According to this aspect, the fluid bag device and the lumbar support member can be arranged in the seat back so as not to interfere with each other.

In the above embodiment, the first side airbag (41) is provided on one of the left and right side portions of the seat back, and the second side airbag (42) is provided on the other side of the left and right side portions of the seat back. Each of the first side airbag and the second side airbag extends vertically, and the upper end of the first side airbag is arranged above the upper end of the second side airbag, and is left and right. Each of the lower ends of the support member may be arranged above the upper end of the second side airbag. According to this aspect, the fluid bag device and the side airbag can be arranged in the seat back so as not to interfere with each other.

In the above aspect, the left and right fluid bag assemblies have left and right outwardly recessed recesses on the left and right inner side edges, and the left and right side portions of the blower are arranged in each of the recesses. It is good. According to this aspect, the fluid bag device and the blower device can be arranged at high density.

Perspective view of the sheet according to the embodiment Perspective view of the frame of the sheet according to the embodiment Front view of seat back frame Perspective view showing fluid bag assembly and support plate An exploded perspective view of the fluid bag assembly Explanatory drawing showing (A) contracted state, (B) partially expanded state, and (C) expanded state of the fluid bag assembly. Cross-sectional view of the inflated state of the fluid bag assembly Cross-sectional view of the inflated state of the fluid bag assembly Cross-sectional view of the inflated state of the fluid bag assembly Front view of the seat back frame according to the partially modified embodiment

Hereinafter, embodiments in which the vehicle seat according to the present invention is applied to an automobile seat will be described with reference to the drawings. In the following description, the vertical direction is the direction along the vertical direction. Further, the front-rear direction is a direction orthogonal to the vertical direction, and the direction in which the seat back is located is the rear and the direction opposite to the rear is the front with respect to the seat cushion. Further, the left-right direction is a direction perpendicular to the vertical direction and the front-back direction, and is determined with the front as a reference.

As shown in FIG. 1, the seat 1 has a seat cushion 3 provided on the floor 2 of an automobile and a seat back 4 extending upward from the rear portion of the seat cushion 3. The seat cushion 3 supports the buttocks of the occupant, and the seat back 4 supports the back of the occupant. As shown in FIG. 2, the seat cushion 3 may be provided on the floor 2 via the slide rail 5. The slide rail 5 has left and right lower rails 5A coupled to the floor 2 and left and right upper rails 5B supported by each of the left and right lower rails 5A so as to be slidable. The seat cushion 3 is connected to the left and right upper rails 5B. An elevating device may be interposed between the seat cushion 3 and the upper rail 5B.

The seat cushion 3 has a seat cushion frame 11 forming a skeleton, a pad 12 supported by the seat cushion frame 11, and a skin material 13 covering the surface of the pad 12. The seat back 4 has a seat back frame 15 forming a skeleton, a pad 16 supported by the seat back frame 15, and a skin material 17 covering the surface of the pad 16. The seat cushion frame 11 and the seat back frame 15 are connected to each other via the reclining device 19 to form the frame 20 of the seat 1. In the following description, the seat back 4 is arranged at an initial position extending vertically.

As shown in FIGS. 2 and 3, the seat back frame 15 has left and right backside members 22 extending vertically, upper members 23 extending left and right and connected to the upper ends of the left and right backside members 22, and left and right. It has a lower member 24 that extends and is connected to each of the lower portions of the left and right backside members 22, and a middle member 25 that extends left and right between the upper member 23 and the lower member 24 and is connected to each of the left and right backside members 22.

The lower portions of the left and right backside members 22 are formed of sheet metal members whose surfaces face left and right. The upper parts of the left and right backside members 22 and the upper member 23 are formed of a continuous pipe material. The pipe material has a central portion extending to the left and right and left and right ends bent with respect to the central portion and extending downward. The left and right ends of the pipe material are joined to the left and right inward facing surfaces of the left and right sheet metal members.

The upper member 23 is provided with a pair of left and right headrest support members 27. Each of the headrest support members 27 is formed in a tubular shape and extends vertically. Each of the headrest support members 27 is connected to the front surface of the upper member 23 by welding or the like. Each of the headrest support members 27 is arranged at a left-right spacing in the central portion of the upper member 23 in the left-right direction. A resin collar (not shown) is attached to each of the headrest support members 27. A pair of left and right pillars 29A (see FIG. 1) extending from the headrest 29 are inserted into and supported by the headrest support member 27 via a collar.

As shown in FIGS. 2 and 3, a lumbar support member 31 for supporting the waist of the occupant is provided at the lower portion of the seat back 4. The lumbar support member 31 has a plate-shaped support plate 32 and an elastic member 33 that connects the support plate 32 and the seat back frame 15. The elastic member 33 is, for example, a plurality of wire springs, and may be spanned between at least two of the middle member 25, the lower member 24, and the left and right backside members 22. In the present embodiment, the elastic member 33 is a pair of left and right wire springs, which extend vertically and are coupled to the middle member 25 and the lower member 24, respectively. The left and right elastic members 33 are connected to the left and right ends of the middle member 25, and have an upper end portion 33A extending downward, an upper intermediate portion 33B extending inwardly and downwardly from the lower end of the upper end portion 33A, and an upper side. It has a lower intermediate portion 33C extending downward from the lower end of the intermediate portion 33B, and a lower end portion 33D extending outward and downward from the lower end of the lower intermediate portion 33C and coupled to the lower member 24. The left and right lower end portions 33D may be connected to each other by the connecting portion 33E, and the elastic member 33 may be formed from one wire spring. The support plate 32 may be coupled to the lower intermediate portion 33C and the lower end portion 33D of the left and right elastic members 33. The support plate 32 is made of resin and has flexibility.

A blower 35 is provided at the center of the upper part of the seat back 4. The blower device 35 has a blower device main body 36 provided with an impeller and a duct 37 extending from the blower device main body 36. The blower 35 is coupled to a bracket 38 coupled to at least one of the upper member 23 and the middle member 25. In the present embodiment, the bracket 38 extends vertically and has an upper end connected to the central portion of the upper member 23 in the left-right direction and a lower end connected to the central portion of the middle member 25 in the left-right direction. The blower main body 36 may be, for example, a centrifugal fan. The blower main body 36 is formed in a flat cylindrical shape, and is fixed to the front surface of the bracket 38 so that the axis faces the front and back. The blower main body 36 is arranged at the center of the upper part of the seat back 4. More specifically, the blower main body 36 is arranged between the upper member 23 and the middle member 25. Further, the blower main body 36 may be arranged between the left and right headrest support members 27 in the left-right direction. The duct 37 has one end coupled to the central portion of the rear surface of the blower main body 36 and the other end forming the intake port 37A. The duct 37 has a lateral portion 37B extending to the right behind the bracket 38 and the right headrest support member 27 from one end, and a vertical portion 37C extending downward and forward from the right end of the lateral portion 37B. That is, the duct 37 extends up and down on the side of the blower main body 36. The intake port 37A is provided at the lower end of the vertical portion 37C. The vertical portion 37C extends vertically to the right of the blower main body 36, and the intake port 37A is arranged below the lower end of the blower main body 36. In another embodiment, the horizontal portion 37B may extend to the left from one end and the vertical portion 37C may be arranged to the left of the blower main body 36. In the present embodiment, the blower main body 36 sucks air from the central portion through the duct 37 and discharges it from the outer peripheral portion. A duct (not shown) through which the discharged air flows may be connected to the outer peripheral portion of the blower main body 36. In other embodiments, the duct 37 may be omitted and the blower body 36 may directly inhale air.

A first side airbag 41 is provided on one of the left and right side portions of the seat back 4, and a second side airbag 42 is provided on the other side of the left and right side portions of the seat back 4. In the present embodiment, the first side airbag 41 is provided on the right side surface of the back side member 22 on the right side, and the second side airbag 42 is provided on the left side surface of the back side member 22 on the left side. Each of the first side airbag 41 and the second side airbag 42 extends up and down. The upper end of the first side airbag 41 is arranged above the upper end of the second side airbag 42. Further, the first side airbag 41 is formed to be vertically longer than the second side airbag 42. In the present embodiment, the seat 1 is the left seat of the vehicle, the first side airbag 41 is the far side airbag away from the side wall of the vehicle, and the second side airbag 42 is the near side airbag near the side wall of the vehicle. Is.

In the sheet 1, a fluid bag device 50 that expands and contracts is arranged between the frame 20 and the skin materials 13 and 17. The fluid bag device 50 has a support member 51 having a support surface 51A, a fluid bag assembly 52 supported on the support surface 51A, and a fluid supply device 53 connected to the fluid bag assembly 52. In the present embodiment, the fluid bag device 50 has a pair of left and right support members 51 and a fluid bag assembly 52, and one fluid supply device 53 connected to the left and right fluid bag assembly 52. The set of the left and right support members 51 and the fluid bag assembly 52 is arranged between the support member 51 and the pad 12. In the present embodiment, the fluid supplied to the fluid bag assembly 52 is air, and the fluid supply device 53 includes an air pump. In other embodiments, the fluid may be a liquid such as water or oil. The fluid supply device 53 may be provided on the inner surface of one of the left and right backside members 22. A drive device 19A for driving the reclining device 19 may be provided on the other inner side surface of the left and right backside members 22. That is, the fluid supply device 53 and the drive device 19A are provided on the inner surface of different backside members 22. The drive device 19A may include an electric motor and a reduction mechanism.

The support member 51 is formed of, for example, resin, and is formed in a plate shape. The left and right support members 51 are provided on the frame 20. The left and right support members 51 are provided on at least one of the middle member 25 and the backside member 22, for example. Further, the left and right support members 51 may be provided on the frame 20 via the elastic member 33. The support member 51 is coupled to, for example, an elastic member 33, and its position is fixed by abutting on the middle member 25 and the backside member 22. A part of the left and right support members 51 is arranged in front of the upper end 33A of the corresponding elastic member 33 on the left and right, the left and right ends of the middle member 25, and the backside member 22. Further, it is preferable that a part of the support member 51 is arranged in front of the joint portion between the left and right backside members 22 and the middle member 25.

The support surface 51A of the support member 51 faces forward along the first direction. Here, one side in the first direction is referred to as the first side, and the other side is referred to as the second side. In the present embodiment, the left and right support members 51 are arranged on the left and right portions in the upper part of the seat back 4 so that the respective support surfaces 51A face forward and the first side is left and right inside and downward. .. The support member 51 has a side surface 51B orthogonal to the support surface 51A. In this embodiment, the support member 51 extends in the first direction.

The left and right support members 51 are arranged on the left and right sides of the blower device 35. Further, one of the left and right support members 51 is arranged on the left and right sides of the duct 37. The right support member 51 is arranged on the right side of the duct 37, and the left support member 51 is arranged on the left side of the duct 37. Further, it is preferable that each of the lower ends of the left and right support members 51 is arranged above the upper ends of the support plate 32. Further, it is preferable that each of the lower ends of the left and right support members 51 is arranged above the upper ends of the second side airbag 42.

As shown in FIGS. 4 and 5, the fluid bag assembly 52 has a first fluid bag 56, a second fluid bag 57, and a third fluid bag 58. The first fluid bag 56 is arranged on the support surface 51A. The second fluid bag 57 has a first coupling portion 61 bonded to the first fluid bag 56 at the end on the first side, and communicates with the first fluid bag 56. The third fluid bag 58 has a second coupling portion 62 to be coupled to the second fluid bag 57 at the end on the first side, and communicates with the second fluid bag 57. Each of the first to third fluid bags 56 to 58 is formed by welding the edges of the laminated sheet materials. For example, two sheet materials may be laminated with each other and their edges may be bonded to each other to form a fluid bag. Further, one sheet material may be folded back to be laminated, and the edges may be bonded to each other to form a fluid bag.

The first fluid bag 56 has a first sheet 56A and a second sheet 56B laminated on each other. The first sheet 56A and the second sheet 56B extend by their respective edges and are coupled to each other by a closed annular third coupling portion 56C. The third joint portion 56C may be a portion where the first sheet 56A and the second sheet 56B are welded to each other or bonded to each other. An introduction pipe 63, which is a pipe having both ends open so as to cross the third joint portion 56C, is interposed between the edges of the first sheet 56A and the second sheet 56B. The outer peripheral surface of the introduction pipe 63 and the first sheet 56A and the second sheet 56B are airtightly sealed.

The first fluid bag 56 is in contact with the support surface 51A in the first sheet 56A and extends in the first direction. At least one of the first sheet 56A and the second sheet 56B has a tab 56D protruding laterally in the middle portion in the first direction. In the present embodiment, the tab 56D is provided on the inner side edge in the left-right direction of the intermediate portion in the first direction of the first sheet 56A and the second sheet 56B. It is preferable that the tabs 56D of the first sheet 56A and the second sheet 56B are connected to each other. The tab 56D is bent along the side surface 51B of the support member 51, and is fastened to the side surface 51B by a fastening member 65 such as a clip or a rivet. The first fluid bag 56 is fixed to the support member 51 by the tab 56D. The first end of the first fluid bag 56 is arranged at a position corresponding to the first end of the support member 51 when viewed from a direction orthogonal to the support surface 51A, and the second end of the first fluid bag 56 is arranged. The side end is arranged at a position corresponding to the second end of the support member 51.

The second fluid bag 57 has a third sheet 57A and a fourth sheet 57B laminated on each other. The third sheet 57A and the fourth sheet 57B extend along their respective edges and are coupled to each other by a closed annular fourth coupling portion 57C. The fourth joint portion 57C may be a portion where the third sheet 57A and the fourth sheet 57B are welded to each other or bonded to each other. The second fluid bag 57 extends in the first direction and is arranged so as to overlap the first fluid bag 56. The third sheet 57A of the second fluid bag 57 comes into contact with the second sheet 56B of the first fluid bag 56. The first end of the second fluid bag 57 is arranged at a position corresponding to the first end of the first fluid bag 56 when viewed from a direction orthogonal to the support surface 51A, and the second fluid bag 57 The end on the second side is arranged at a position corresponding to the end on the second side of the first fluid bag 56.

The first-side end of the third sheet 57A and the first-side end of the second sheet 56B are coupled to each other by the first coupling portion 61. The first joint portion 61 may be a portion where the third sheet 57A and the second sheet 56B are welded to each other or bonded to each other. The first coupling portion 61 has a first side edge 61A which is a side edge on the second side. The first side edge 61A extends linearly. The first fluid bag 56 and the second fluid bag 57 are connected by a first communication hole 61B that passes through the first coupling portion 61. The first communication hole 61B is formed in the second sheet 56B and the third sheet 57A.

The third fluid bag 58 has a fifth sheet 58A and a sixth sheet 58B laminated on each other. The fifth sheet 58A and the sixth sheet 58B extend along their respective edges and are coupled to each other by a closed annular fifth coupling portion 58C. The fifth joint portion 58C may be a portion where the fifth sheet 58A and the sixth sheet 58B are welded to each other or bonded to each other. The third fluid bag 58 extends in the first direction and is arranged so as to overlap the second fluid bag 57. The fifth sheet 58A of the third fluid bag 58 contacts the fourth sheet 57B of the second fluid bag 57. When viewed from a direction orthogonal to the support surface 51A, the first end of the third fluid bag 58 is offset to the second end with respect to the first end of the second fluid bag 57, and is arranged so as to be offset to the second side. 3 The second end of the fluid bag 58 is arranged at a position corresponding to the second end of the second fluid bag 57. That is, the length of the second fluid bag 57 in the first direction is longer than the length of the third fluid bag 58 in the first direction.

The first-side end of the fifth sheet 58A and the intermediate portion of the fourth sheet 57B in the first direction are coupled to each other by a second coupling portion 62. The second joint portion 62 may be a portion where the fourth sheet 57B and the fifth sheet 58A are welded to each other or bonded to each other. The second coupling portion 62 has a second side edge 62A, which is a side edge on the second side. The second side edge 62A extends linearly. The second fluid bag 57 and the third fluid bag 58 are connected by a second communication hole 62B that passes through the second coupling portion 62. The second communication hole 62B is formed in the fourth sheet 57B and the fifth sheet 58A.

The introduction pipe 63 of the left and right fluid bag assembly 52 is connected to the fluid supply device 53 via the tube 67. The fluid bag assembly 52 expands by receiving the supply of the fluid and contracts by discharging the fluid.

As shown in FIGS. 3 and 6A, when the fluid bag assembly 52 is contracted, the first side edge 61A and the second side edge 62A are different from each other when viewed from a direction orthogonal to the support surface 51A. It extends in the direction. That is, the angle formed by the first side edge 61A and the first direction is different from the angle formed by the second side edge 62A and the first direction when viewed from the direction orthogonal to the support surface 51A. Further, the second side edge 62A is arranged on the second side of the first side edge 61A.

The first side edge 61A and the second side edge 62A may be arranged below the central axis of the blower main body 36. Further, the first side edge 61A and the second side edge 62A may be arranged below the upper end of the first side airbag 41. Further, it is preferable that the upper end of the fluid bag assembly 52 is arranged below the central axis of the blower main body 36. Further, it is preferable that the upper end of the fluid bag assembly 52 is arranged below the upper end of the first side airbag 41.

Each of the first to third fluid bags 56 to 58 has a planar shape in a contracted state and is laminated with each other. When the fluid supply device 53 is driven and air is supplied to the fluid bag assembly 52, the fluid bag assembly 52 expands. The air supplied from the fluid supply device 53 via the tube 67 flows through the introduction pipe 63 into the first fluid bag 56, and from the first fluid bag 56 through the first communication hole 61B to the second fluid. It flows into the bag 57, passes through the second communication hole 62B from the second fluid bag 57, and flows into the third fluid bag 58. As a result, the fluid bag assembly 52 expands.

In the expanded state, the thickness of each of the first to third fluid bags 56 to 58 gradually increases from the edge portion to the central portion. Therefore, as shown in FIG. 7, in the expanded state, the second fluid bag 57 bends around the first side edge 61A, and the second end of the second fluid bag 57 is the second of the first fluid bag 56. Move away from the end on the 2nd side. Further, the third fluid bag 58 is bent around the second side edge 62A, and the second end portion of the third fluid bag 58 is separated from the second side end portion of the second fluid bag 57. As a result, the end portion on the second side of the fluid bag assembly 52 becomes wider than the end portion on the first side in the direction orthogonal to the support surface 51A.

In a state where the left and right fluid bag assemblies 52 are contracted, each of the first side edge 61A and the second side edge 62A extends downward with an inclination toward the left and right outwards when viewed from the front. As a result, the end portion of the second fluid bag 57 on the second side moves or rotates inward and downward on the left and right with the first side edge 61A as the center when expanded. Similarly, the second end of the third fluid bag 58 moves or rotates inwardly and downwardly around the second side edge 62A when inflated. Since the first side edge 61A and the second side edge 62A extend in different directions, the second end of the second fluid bag 57 and the second end of the third fluid bag 58 The direction of movement is different from. In the present embodiment, each of the second end of the second fluid bag 57 moves forward, left and right inward and downward, and each of the second end of the third fluid bag 58 moves forward and left and right inward and downward. Move forward and inward left and right. As a result, the fluid bag assembly 52 expands as shown in FIGS. 6A to 6C.

According to the fluid bag device 50 according to the present embodiment, since the first side edge 61A and the second side edge 62A extend in different directions from each other, the expansion direction of the second fluid bag 57 and the expansion direction of the third fluid bag 58 The expansion direction can be changed. Thereby, the shape of the fluid bag assembly 52 at the time of expansion can be diversified. The first to third fluid bags 56 to 58 are coupled at the first coupling portion 61 and the second coupling portion 62, and the first communication hole 61B and the second communication hole 62B are connected to the first coupling portion 61 and the second coupling portion 62. Since it is formed, the structure is simple. Since the tab 56D of the first fluid bag 56 is bent and fastened to the side surface 51B orthogonal to the support surface 51A, the support member 51 can be miniaturized.

The fluid bag device 50 can inflate the portion of the seat back 4 corresponding to the shoulder of the seated person inward and downward in the left-right direction. Thereby, it is possible to provide the seat back 4 according to the position and shape of the shoulder of the seated person. Since the left and right fluid bag assemblies expand forward, left and right inward and downward, respectively, the fluid bag device 50 may be a blower device, a lumbar support member 31, and other nearside airbags, depending on the physique of the seated person. It is located in a position that does not interfere with the device.

As shown in FIG. 2, the seat cushion frame 11 extends left and right with the left and right cushion side members 71 extending back and forth, the front member 72 extending left and right and connecting the front ends of the left and right cushion side members 71, and the left and right. It has a rear member 73 that connects the rear ends of the cushion side member 71 of the cushion side member 71, and a movable frame 74 that is supported by the front member 72 so as to be movable back and forth. A support member 75 that supports the buttocks of the occupant is bridged between the front member 72 and the rear member 73. The support member 75 may include a plate-shaped member formed of resin and a plurality of wire springs coupled to the plate-shaped member.

The movable frame 74 is provided on the upper surface of the front member 72 and is movably supported on the front side and the rear side with respect to the front member 72. It has a front plate 74B arranged in front of the. The rear portion of the upper plate 74A has a left end and a right end extending rearward with respect to the central portion. The front plate 74B is formed in an arc shape that is convex toward the front when viewed from the left and right sides.

As shown in FIGS. 8 and 9, an accommodating recess 72A recessed downward is formed in the central portion of the upper surface of the front member 72 in the left-right direction. The front and rear ends of the accommodating recess 72A may reach the front and rear ends of the front member 72. A pair of left and right rails 77A extending back and forth are provided on the left and right sides of the accommodating recess 72A on the upper surface of the front member 72. Each of the left and right rails 77A is provided with a slider 77B so as to be movable back and forth with respect to the rail 77A. The upper plate 74A of the front member 72 is connected to the left and right sliders 77B by bolts 78. As a result, the movable frame 74 is provided on the front member 72 so as to be movable back and forth via the slider 77B and the rail 77A. The accommodating recess 72A is arranged below the upper plate 74A of the front member 72.

As the upper plate 74A is displaced back and forth, the movable frame 74 moves between the initial position and the protruding position with respect to the front member 72. The movable frame 74 reaches the protruding position by moving from the initial position to the front side. Further, the movable frame 74 returns to the initial position by moving from the protruding position to the rear side.

The pad 12 of the seat cushion 3 is arranged so as to cover the upper surface and the front surface of the movable frame 74. When the movable frame 74 moves from the initial position to the protruding position, the movable frame 74 slides with respect to the pad 12. The pad 12 has a sufficient length so that the front plate 74B of the movable frame 74 can be covered even when the movable frame 74 is in the protruding position. When the movable frame 74 is in the initial position, it is preferable that the leading edge of the pad 12 extends below the lower edge of the front plate 74B of the movable frame 74.

The seat 1 further includes an actuator 80 that moves the movable frame 74 to the front side and the rear side with respect to the front member 72. The actuator 80 includes a first actuator 81 that urges the movable frame 74 to the front side, a second actuator 82 that urges the movable frame 74 to the rear side, and a case 85 that houses the first actuator 81 and the second actuator 82. , A control device (not shown) for controlling the urging force generated by each of the first actuator 81 and the second actuator 82.

As shown in FIG. 8, each of the first actuator 81 and the second actuator 82 is formed by a fluid bag assembly that expands by supplying compressed air and contracts by discharging compressed air. .. The control device includes a compressor that generates compressed air, a connecting pipe that connects the compressor and the first actuator 81, a connecting pipe that connects the compressor and the second actuator 82, a control valve provided in each connecting pipe, a compressor, and a control device. It is preferable to have an electronic control device (ECU) for controlling the valve, an operation switch for inputting a signal to the electronic control device, and the like.

The case 85 is arranged in the accommodating recess 72A and has a bottom wall 85A extending back and forth, a front wall 85B extending upward from the front end of the bottom wall 85A, and a rear wall 85C extending upward from the rear end of the bottom wall 85A. The bottom wall 85A is fastened to the bottom of the accommodating recess 72A. Further, the case 85 may have left and right end walls 85D extending back and forth along each of the left and right side edges of the bottom wall 85A and connected to each of the front wall 85B and the rear wall 85C. The bottom wall 85A, the front wall 85B, the rear wall 85C, and the left and right end walls 85D cooperate with each other to form a box structure that opens upward.

A pressure receiving plate 74C extending downward is provided at the center of the rear end of the upper plate 74A of the movable frame 74. The pressure receiving plate 74C is arranged between the front wall 85B and the rear wall 85C. Further, the pressure receiving plate 74C is arranged between the left and right end walls 85D. The first actuator 81 is arranged between the front wall 85B and the pressure receiving plate 74C, and the second actuator 82 is arranged between the pressure receiving plate 74C and the rear wall 85C.

As the first actuator 81 and the second actuator 82 expand and contract, the pressure receiving plate 74C moves with respect to the front wall 85B and the rear wall 85C, and the movable frame 74 moves back and forth with respect to the front member 72.

The compressed air is supplied to the corresponding first actuator 81 and the second actuator 82, so that the first actuator 81 and the second actuator 82 expand. When the control valve is in the holding state, the flow of air to the corresponding first actuator 81 and the second actuator 82 is cut off, and the first actuator 81 and the second actuator 82 maintain their size. When the control valve is in the discharged state, the compressed air in the corresponding first actuator 81 and the second actuator 82 is discharged to the outside, and the first actuator 81 and the second actuator 82 contract.

The rear end of the cover member 86 is coupled to the rear portion of the accommodating recess 72A. The cover member 86 includes a flange 86A fastened to a portion of the accommodating recess 72A behind the rear wall 85C, a vertical plate portion 86B extending upward from the front edge of the flange 86A to the rear of the rear wall 85C, and a vertical plate. It has a horizontal plate portion 86C extending forward from the upper end of the portion 86B and arranged above the upper plate 74A of the movable frame 74. The horizontal plate portion 86C covers the rear portion of the upper plate 74A. The horizontal plate portion 86C supports the pad 12 from below.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. The fluid bag device 50 may be provided on the seat cushion 3 or the headrest 29. Further, the fluid bag device 50 is not limited to the three fluid bags 56 to 58, and may include four or more fluid bags. For example, the fluid bag device 50 may include a fourth fluid bag coupled to the third fluid bag 58 or a fifth fluid bag coupled to the fourth fluid bag.

In the embodiment in which a part of the embodiment is modified, the fluid bag assembly 52 may be arranged close to the periphery of the blower 35 as shown in FIG. In this case, it is preferable that the fluid bag assembly 52 has recesses 101 recessed left and right outward on the left and right inner side edges, and the left and right side portions of the blower 35 are arranged in each of the recesses 101. The recess 101 may be formed in a shape along the outer edge of the blower device 35. For example, the blower 100 may be formed in a cylindrical shape, and the recess 101 may be formed in an arc shape having a radius equal to that of the blower 100. As a result, the size of the fluid bag assembly 52 can be increased while avoiding interference between the fluid bag assembly 52 and the blower device 35. Further, the support plate 102 of the lumbar support member 31 may extend to the left and right, and the left end and the right end may reach the left and right backside members 22. The blower 35 may be supported by the support plate 102. Further, the support plate 102 of the lumbar support member 31 may form the support member of the fluid bag device 50. In this case, the fluid bag assembly 52 may be coupled to the support plate 102.

1: Seat 3: Seat cushion 4: Seat back 15: Seat back frame 20: Frame 22: Backside member 23: Upper member 24: Lower member 25: Middle member 31: Lumber support member 32: Support plate 33: Elastic member 35: Blower Device 36: Blower body 37: Duct 41: First side air bag 42: Second side air bag 50: Fluid bag device 51: Support member 51A: Support surface 51B: Side surface 52: Fluid bag assembly 53: Fluid supply device 56: 1st fluid bag 56D: Tab 57: 2nd fluid bag 58: 3rd fluid bag 61: 1st coupling portion 61A: 1st side edge 61B: 1st communication hole 62: 2nd coupling portion 62A: 2nd side Edge 62B: Second communication hole 63: Introductory pipe 65: Fastening member 67: Tube

Claims (12)

A fluid bag device that is placed between the frame and the skin material in a vehicle seat and expands and contracts.
A support member provided on the frame and having a support surface along the first direction,
With the fluid bag assembly placed on the support surface,
It has a fluid supply device connected to the fluid bag assembly and
One side in the first direction is the first side, and the other side is the second side.
The fluid bag assembly is
The first fluid bag arranged on the support surface and
A second fluid bag having a first coupling portion to be coupled to the first fluid bag at the end on the first side and communicating with the first fluid bag, and a second fluid bag.
It has a second coupling portion that is coupled to the second fluid bag at the end on the first side, and a third fluid bag that communicates with the second fluid bag.
In a state where the fluid bag assembly is contracted, the first side edge, which is the side edge of the first joint portion on the second side, and the second joint portion, when viewed from a direction orthogonal to the support surface. The second side edge, which is the side edge of the second side, is a fluid bag device that extends linearly and extends in different directions from each other. The fluid bag device according to claim 1, wherein the second side edge is arranged on the second side of the first side edge. The fluid bag device according to claim 1 or 2, wherein the length of the second fluid bag in the first direction is longer than the length of the third fluid bag in the first direction. The fluid supply device is connected to the first fluid bag and is connected to the first fluid bag.
The first fluid bag and the second fluid bag are connected by a first communication hole passing through the first coupling portion.
The fluid bag device according to any one of claims 1 to 3, wherein the second fluid bag and the third fluid bag are connected by a second communication hole passing through the second connecting portion. The fluid bag device according to any one of claims 1 to 4, wherein the first fluid bag, the second fluid bag, and the third fluid bag extend in the first direction. The first fluid bag has a tab protruding laterally and has a tab.
The fluid bag device according to any one of claims 1 to 5, wherein the tab is fastened to a side surface of the support member orthogonal to the support surface. A vehicle seat having the fluid bag device according to any one of claims 1 to 6.
A seat cushion that supports the occupant's buttocks,
It has a seat back that extends upward from the rear of the seat cushion and supports the back of the occupant.
Each of the support member and the fluid bag assembly is provided in pairs on the left and right.
The left and right support members are arranged on the left and right portions in the upper part of the seat back so that the support surfaces thereof face forward and the first side faces the left and right inside and downward.
A vehicle seat in which the first side edge and the second side edge each extend downward from the left and right outwards when viewed from the front in a state where the fluid bag assembly is contracted. A blower is provided at the center of the upper part of the seat back.
The vehicle seat according to claim 7, wherein the left and right support members are arranged on the left and right sides of the blower. The blower has a blower main body provided with an impeller and a duct extending from the blower main body.
The blower main body is arranged in the central portion in the upper part of the seat back.
The duct extends up and down on the side of the blower main body, and the duct extends vertically.
The vehicle seat according to claim 8, wherein one of the left and right support members is arranged on the left and right sides of the duct. At the lower part of the seat back, a lumbar support member for supporting the waist of the occupant is provided.
The lumbar support member has a support plate and an elastic member that connects the support plate to the frame.
The vehicle seat according to any one of claims 7 to 9, wherein each of the lower ends of the left and right support members is arranged above the upper end of the support plate. A first side airbag is provided on one of the left and right sides of the seat back.
A second side airbag is provided on the other side of the left and right sides of the seat back.
Each of the first side airbag and the second side airbag extends up and down.
The upper end of the first side airbag is arranged above the upper end of the second side airbag.
The vehicle seat according to any one of claims 7 to 9, wherein each of the lower ends of the left and right support members is arranged above the upper end of the second side airbag. The left and right fluid bag assemblies have left and right outwardly recessed recesses on the left and right inner side edges.
The vehicle seat according to claim 8 or 9, wherein the left and right side portions of the blower are arranged in each of the recesses.

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