Vehicle seat

Abstract

[Problem] To provide a vehicle seat capable of comfortably supporting the shoulders of a seated person. [Solution] In a vehicle seat (1) provided with a seat cushion (3) and a seat back (4), the seat back comprises: left and right side members (22) extending upward and downward; a lower straddle member (24) extending laterally and connected to the left and right side members, a straddle member (25) extending laterally above the lower straddle member and connected to the left and right side members; at least one wire member (31) extending upward and downward and connected to the lower crossing member and the crossing member; and at least one shoulder support member (32) supported on the upper portion of the wire member. The shoulder support member includes: a first plate member (32A) facing the front-rear direction and connected to an upper portion of the wire member; and a second plate member (32C) facing the front-rear direction and connected to the first plate member by a flexible member (32B).

Description

This application is a divisional application of Chinese invention patent application No. 202180030292.1, with an international filing date of April 20, 2021, and entitled "Vehicle Seat". Technical Field

[0001] This invention relates to a vehicle seat. Background Technology

[0002] Patent Document 1 discloses a seat back that includes a lumbar support member and left and right shoulder support members. The left and right shoulder support members are integrally formed at the upper end of the lumbar support member. Patent Document 2 discloses a seat back that includes a single shoulder support member extending laterally. In Patent Document 2, the shoulder support member is independent of the lumbar support member and is connected to a blower. Existing technical documents Patent documents

[0003] [Patent Document 1] JP2015-209082A [Patent Document 2] JP2015-209062A Summary of the Invention The task to be accomplished by this invention

[0004] The shoulder support member can comfortably support the seated person by moving and deforming along the occupant's shoulders. However, since the shoulder support member of Patent Document 1 is connected to the lumbar support member, it is difficult to move and deform. Similarly, the shoulder support member of Patent Document 2 is connected to the blower, thus also difficult to move and deform. Therefore, the shoulder support members of Patent Documents 1 and 2 cannot comfortably support the shoulders of the seated person.

[0005] In view of the above background, the object of the present invention is to provide a vehicle seat that can comfortably support the shoulders of a seated person. means of completing the task

[0006] To achieve the above objectives, a vehicle seat (1) is provided, which is provided with a seat cushion (3) and a seat back (4), wherein the seat back includes: left and right side members (22) extending upward and downward; a lower cross member (24) extending laterally and connected to the left and right side members; a cross member (25) extending laterally above the lower cross member and connected to the left and right side members; at least one wire member (31) extending upward and downward and connected to the lower cross member and the cross member; and at least one shoulder support member (32) supported on the upper part of the wire member, and the shoulder support member includes: a first plate member (32A) facing the fore-aft direction and connected to the upper part of the wire member; and a second plate member (32C) facing the fore-aft direction and connected to the first plate member via a flexible member (32B).

[0007] Based on this aspect, the second plate component can be displaced relative to the first plate component by the deformation of the flexible component. Therefore, when the shoulder support member is pushed by the shoulder of the seated person, the first plate component and the second plate component can move along the shoulder. Thus, a vehicle seat that can comfortably support the shoulder of the seated person can be provided.

[0008] In the above aspects, preferably, the plate-shaped waist support member (44) facing the front-rear direction is supported on the lower part of the wire member.

[0009] Based on this, it is possible to support the shoulder support member by using a wire member that supports the waist support member.

[0010] In the above aspects, preferably, the wire member includes a first portion (31A) and a second portion (31B) that are inclined relative to each other via a bend, and the first plate component of the shoulder support member includes a first locking portion (34) that locks the first portion and a second locking portion (35) that locks the second portion.

[0011] Based on this aspect, since the first locking part and the second locking part lock the first part and the second part that are inclined relative to each other, the position of the shoulder member relative to the wire member can be fixed.

[0012] In the above aspects, preferably, the first plate component of the shoulder support member includes a placement member (36) located between the first locking portion and the second locking portion, the placement member contacting the first portion and the second portion.

[0013] Based on this aspect, the position of the shoulder member relative to the wire member can be more reliably fixed due to the contact with the mounting components of the first and second parts.

[0014] In the above aspects, preferably, when viewed from the front, the first plate component and the flexible component are disposed between the left and right side members, and at least a portion of the second plate component is disposed in front of the side members.

[0015] Based on this, the first plate member can be moved backward relative to the second plate member along the back of the seated person.

[0016] In the above aspects, preferably, when viewed from the front, the flexible member extends upward and downward along the lateral inner edge of the side member.

[0017] Based on this, the first plate component can be moved backward without interfering with the side components.

[0018] In the above aspects, preferably, the flexible member has a slit (39) that penetrates the flexible member in the front-back direction and extends upward and downward with an opening at the lower end.

[0019] Based on this aspect, the first plate member can be easily displaced relative to the second plate member.

[0020] In the above aspects, preferably, a fluid bag assembly (52) that expands when liquid is supplied is provided on the front surface of the shoulder support member.

[0021] Based on this, the fluid bag can change the shape of the padding located in front of the shoulder support member. Thus, the vehicle seat can comfortably support the shoulders of the occupant.

[0022] In the above aspects, preferably, the shoulder support member includes a support surface (32F) extending in a first direction and facing forward, a fluid supply device (53) connected to the fluid bag assembly, one side in the first direction being referred to as the first side and the other side in the first direction being referred to as the second side, the fluid bag assembly including: a first fluid bag (56) disposed on the support surface; a second fluid bag (57) having a first connecting member (61) connected to and communicating with the first fluid bag at its end on the first side; and a third fluid bag (58) having a second connecting member (62) connected to and communicating with the second fluid bag at its end on the first side, and wherein, when viewed in a direction perpendicular to the support surface in the retracted state of the fluid bag assembly, the first side edge (61A) and the second side edge (62A) each extend in a straight line and in mutually different directions, wherein the first side edge is the side edge of the first connecting member on the second side, and the second side edge is the side edge of the second connecting member on the second side.

[0023] Based on this aspect, since the first and second side edges extend in different directions, it is possible to change the expansion direction of the second fluid bag and the third fluid bag. Therefore, it is possible to diversify the shape of the fluid bag assembly during expansion.

[0024] In the above aspects, preferably, the second side edge is positioned further away on the second side than the first side edge.

[0025] Based on this aspect, it is possible to diversify the shape of the fluid bag assembly during expansion.

[0026] In the above aspects, preferably, 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.

[0027] Based on this aspect, it is possible to diversify the shape of the fluid bag assembly during expansion.

[0028] In the above aspects, preferably, the fluid supply device is connected to the first fluid bag, the first fluid bag and the second fluid bag are connected through a first connecting hole (61B) through the first connecting member, and the second fluid bag and the third fluid bag are connected through a second connecting hole (62B) through the second connecting member.

[0029] Based on this aspect, the structure used to connect the air supply device and the fluid bag assembly can be made simple.

[0030] In the above aspects, preferably, the first fluid bag, the second fluid bag, and the third fluid bag extend in the first direction.

[0031] Based on this aspect, it is possible to simplify the manufacturing of the shape of the fluid bag assembly during shrinkage.

[0032] In the above aspects, preferably, the first fluid bag includes a tongue (56D) protruding to one side, and the tongue is fastened to a side surface perpendicular to the support surface of the shoulder support member.

[0033] Based on this, the shoulder support can be manufactured compactly in terms of size, and the fluid bag assembly can also be manufactured compactly in terms of size.

[0034] In the foregoing, preferably, the shoulder support member includes a pair of left and right shoulder support members, and the fluid bag assembly includes a pair of left and right fluid bag assemblies, the left and right shoulder support members being arranged on the upper left and right portions of the seat back, such that the first side points laterally inward and downward, and when viewed from the front, each of the first side edge and the second side edge extends obliquely downward in a laterally outward direction when the fluid bag assembly is in the retracted state.

[0035] Based on this aspect, the fluid bag assembly allows the portion of the seat back corresponding to the occupant's shoulders to bulge laterally inward and downward. This provides a seat back that conforms to the position and shape of the occupant's shoulders.

[0036] In the above aspects, preferably, the second plate component and the side member are in contact with each other in the front-rear direction.

[0037] Based on this, the position of the second plate component in the seat back can be fixed.

[0038] In the above aspects, preferably, when viewed from the front, the second plate component extends along the side member.

[0039] In this respect, since the second plate member is located between the shoulder of the seated person and the side member, it can comfortably support the shoulder of the seated person.

[0040] In the above aspects, preferably, the second plate component includes a rearwardly projecting mating portion (37) in its rear portion, and the second plate component contacts the side member at the mating portion.

[0041] Based on this aspect, the second plate component and the side member can reliably contact each other.

[0042] In the above aspects, preferably, the second plate component and the side member are in contact with each other in the front-rear direction via a cushioning material (38).

[0043] In this respect, the cushioning material prevents friction and clicking between the second plate component and the side member, thereby preventing noise generation.

[0044] In the above aspects, preferably, the rear surface of the second plate component is provided with a reinforcing structure (41).

[0045] Based on this, it is possible to increase the stiffness of the second plate component of the contact side member.

[0046] In the foregoing, preferably, the wire member comprises a pair of left and right wire members, and the shoulder support member comprises a pair of left and right shoulder support members corresponding to the left and right wire members.

[0047] Based on this aspect, the left and right shoulder support members can be moved independently of each other in a manner that follows the shoulders of the occupant. Thus, a vehicle seat that can comfortably support the shoulders of the occupant can be provided.

[0048] In the above aspects, preferably, the lateral inner edge of the first plate component is inclined laterally outward in the upward direction.

[0049] Based on this aspect, a space can be formed between the upper parts of the left and right shoulder support members. Devices such as blowers can be installed in said space.

[0050] In the above aspects, preferably, the blower (46) is disposed in the central part of the upper part of the seat back, and the left and right shoulder support members are disposed on the left and right sides of the blower.

[0051] Based on this, the fluid bag assembly and the blower can be installed inside the seat back without interfering with each other.

[0052] In the foregoing, preferably, the blower includes: a blower body (36) provided with an impeller; and a duct (46B) extending from the blower body, wherein the blower body is disposed in the central portion of the upper part of the seat back, the duct extends upward and downward on one side of the blower body, and one of the left and right shoulder support members is disposed on the left or right side of the duct.

[0053] Based on this, the fluid bag assembly and the blower can be installed inside the seat back without interfering with each other.

[0054] In the above manner, preferably, one of the left and right sides of the seat back is provided with a first side airbag (48), and the other of the left and right sides of the seat back is provided with a second side airbag (49). Each of the first and second side airbags extends upward and downward, the upper end of the first side airbag is positioned higher than the upper end of the second side airbag, and the lower end of each of the left and right shoulder support members is positioned higher than the upper end of the second side airbag.

[0055] Based on this, the fluid bag assembly and side airbags can be installed in the seat back without interfering with each other.

[0056] In the above aspects, preferably, each of the left and right fluid bag assemblies has a laterally outward recess on its laterally inner edge, and the left and right sides of the blower are disposed in the respective recesses.

[0057] Based on this, it is possible to install fluid bag assemblies and blowers at high density. The effects of the invention

[0058] To achieve the above objectives, a vehicle seat (1) is provided, which is provided with a seat cushion (3) and a seat back (4), wherein the seat back includes: left and right side members (22) extending upward and downward; a lower cross member (24) extending laterally and connected to the left and right side members; a cross member (25) extending laterally above the lower cross member and connected to the left and right side members; at least one wire member (31) extending upward and downward and connected to the lower cross member and the cross member; and at least one shoulder support member (32) supported on the upper part of the wire member, and the shoulder support member includes: a first plate member (32A) facing the fore-aft direction and connected to the upper part of the wire member; and a second plate member (32C) facing the fore-aft direction and connected to the first plate member via a flexible member (32B).

[0059] Based on this aspect, the second plate component can be displaced relative to the first plate component by the deformation of the flexible component. Therefore, when the shoulder support member is pushed by the shoulder of the seated person, the first plate component and the second plate component can move along the shoulder. Thus, a vehicle seat that can comfortably support the shoulder of the seated person can be provided.

[0060] In the above aspects, preferably, the plate-shaped waist support member (44) facing the front-rear direction is supported on the lower part of the wire member.

[0061] Based on this, it is possible to support the shoulder support member by using a wire member that supports the waist support member.

[0062] In the above aspects, preferably, the wire member includes a first portion (31A) and a second portion (31B) that are inclined relative to each other via a bend, and the first plate component of the shoulder support member includes a first locking portion (34) that locks the first portion and a second locking portion (35) that locks the second portion.

[0063] Based on this aspect, since the first locking part and the second locking part lock the first part and the second part that are inclined relative to each other, the position of the shoulder member relative to the wire member can be fixed.

[0064] In the above aspects, preferably, the first plate component of the shoulder support member includes a placement member (36) located between the first locking portion and the second locking portion, the placement member contacting the first portion and the second portion.

[0065] Based on this aspect, the position of the shoulder member relative to the wire member can be more reliably fixed due to the contact with the mounting components of the first and second parts.

[0066] In the above aspects, preferably, when viewed from the front, the first plate component and the flexible component are disposed between the left and right side members, and at least a portion of the second plate component is disposed in front of the side members.

[0067] Based on this, the first plate member can be moved backward relative to the second plate member along the back of the seated person.

[0068] In the above aspects, preferably, when viewed from the front, the flexible member extends upward and downward along the lateral inner edge of the side member.

[0069] Based on this, the first plate component can be moved backward without interfering with the side components.

[0070] In the above aspects, preferably, the flexible member has a slit (39) that penetrates the flexible member in the front-back direction and extends upward and downward with an opening at the lower end.

[0071] Based on this aspect, the first plate member can be easily displaced relative to the second plate member.

[0072] In the above aspects, preferably, a fluid bag assembly (52) that expands when liquid is supplied is provided on the front surface of the shoulder support member.

[0073] Based on this, the fluid bag can change the shape of the padding located in front of the shoulder support member. Thus, the vehicle seat can comfortably support the shoulders of the occupant.

[0074] In the above aspects, preferably, the shoulder support member includes a support surface (32F) extending in a first direction and facing forward, a fluid supply device (53) connected to the fluid bag assembly, one side in the first direction being referred to as the first side and the other side in the first direction being referred to as the second side, the fluid bag assembly including: a first fluid bag (56) disposed on the support surface; a second fluid bag (57) having a first connecting member (61) connected to and communicating with the first fluid bag at its end on the first side; and a third fluid bag (58) having a second connecting member (62) connected to and communicating with the second fluid bag at its end on the first side, and wherein, when viewed in a direction perpendicular to the support surface in the retracted state of the fluid bag assembly, the first side edge (61A) and the second side edge (62A) each extend in a straight line and in mutually different directions, wherein the first side edge is the side edge of the first connecting member on the second side, and the second side edge is the side edge of the second connecting member on the second side.

[0075] Based on this aspect, since the first and second side edges extend in different directions, it is possible to change the expansion direction of the second fluid bag and the third fluid bag. Therefore, it is possible to diversify the shape of the fluid bag assembly during expansion.

[0076] In the above aspects, preferably, the second side edge is positioned further away on the second side than the first side edge.

[0077] Based on this aspect, it is possible to diversify the shape of the fluid bag assembly during expansion.

[0078] In the above aspects, preferably, 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.

[0079] Based on this aspect, it is possible to diversify the shape of the fluid bag assembly during expansion.

[0080] In the above aspects, preferably, the fluid supply device is connected to the first fluid bag, the first fluid bag and the second fluid bag are connected through a first connecting hole (61B) through the first connecting member, and the second fluid bag and the third fluid bag are connected through a second connecting hole (62B) through the second connecting member.

[0081] Based on this aspect, the structure used to connect the air supply device and the fluid bag assembly can be made simple.

[0082] In the above aspects, preferably, the first fluid bag, the second fluid bag, and the third fluid bag extend in the first direction.

[0083] Based on this aspect, it is possible to simplify the manufacturing of the shape of the fluid bag assembly during shrinkage.

[0084] In the above aspects, preferably, the first fluid bag includes a tongue (56D) protruding to one side, and the tongue is fastened to a side surface perpendicular to the support surface of the shoulder support member.

[0085] Based on this, the shoulder support can be manufactured compactly in terms of size, and the fluid bag assembly can also be manufactured compactly in terms of size.

[0086] In the foregoing, preferably, the shoulder support member includes a pair of left and right shoulder support members, and the fluid bag assembly includes a pair of left and right fluid bag assemblies, the left and right shoulder support members being arranged on the upper left and right portions of the seat back, such that the first side points laterally inward and downward, and when viewed from the front, each of the first side edge and the second side edge extends obliquely downward in a laterally outward direction when the fluid bag assembly is in the retracted state.

[0087] Based on this aspect, the fluid bag assembly allows the portion of the seat back corresponding to the occupant's shoulders to bulge laterally inward and downward. This provides a seat back that conforms to the position and shape of the occupant's shoulders.

[0088] In the above aspects, preferably, the second plate component and the side member are in contact with each other in the front-rear direction.

[0089] Based on this, the position of the second plate component in the seat back can be fixed.

[0090] In the above aspects, preferably, when viewed from the front, the second plate component extends along the side member.

[0091] In this respect, since the second plate member is located between the shoulder of the seated person and the side member, it can comfortably support the shoulder of the seated person.

[0092] In the above aspects, preferably, the second plate component includes a rearwardly projecting mating portion (37) in its rear portion, and the second plate component contacts the side member at the mating portion.

[0093] Based on this aspect, the second plate component and the side member can reliably contact each other.

[0094] In the above aspects, preferably, the second plate component and the side member are in contact with each other in the front-rear direction via a cushioning material (38).

[0095] In this respect, the cushioning material prevents friction and clicking between the second plate component and the side member, thereby preventing noise generation.

[0096] In the above aspects, preferably, the rear surface of the second plate component is provided with a reinforcing structure (41).

[0097] Based on this, it is possible to increase the stiffness of the second plate component of the contact side member.

[0098] In the foregoing, preferably, the wire member comprises a pair of left and right wire members, and the shoulder support member comprises a pair of left and right shoulder support members corresponding to the left and right wire members.

[0099] Based on this aspect, the left and right shoulder support members can be moved independently of each other in a manner that follows the shoulders of the occupant. Thus, a vehicle seat that can comfortably support the shoulders of the occupant can be provided.

[0100] In the above aspects, preferably, the lateral inner edge of the first plate component is inclined laterally outward in the upward direction.

[0101] Based on this aspect, a space can be formed between the upper parts of the left and right shoulder support members. Devices such as blowers can be installed in said space.

[0102] In the above aspects, preferably, the blower (46) is disposed in the central part of the upper part of the seat back, and the left and right shoulder support members are disposed on the left and right sides of the blower.

[0103] Based on this, the fluid bag assembly and the blower can be installed inside the seat back without interfering with each other.

[0104] In the foregoing, preferably, the blower includes: a blower body (36) provided with an impeller; and a duct (46B) extending from the blower body, wherein the blower body is disposed in the central portion of the upper part of the seat back, the duct extends upward and downward on one side of the blower body, and one of the left and right shoulder support members is disposed on the left or right side of the duct.

[0105] Based on this, the fluid bag assembly and the blower can be installed inside the seat back without interfering with each other.

[0106] In the above manner, preferably, one of the left and right sides of the seat back is provided with a first side airbag (48), and the other of the left and right sides of the seat back is provided with a second side airbag (49). Each of the first and second side airbags extends upward and downward, the upper end of the first side airbag is positioned higher than the upper end of the second side airbag, and the lower end of each of the left and right shoulder support members is positioned higher than the upper end of the second side airbag.

[0107] Based on this, the fluid bag assembly and side airbags can be installed in the seat back without interfering with each other.

[0108] In the above aspects, preferably, each of the left and right fluid bag assemblies has a laterally outward recess on its laterally inner edge, and the left and right sides of the blower are disposed in the respective recesses.

[0109] Based on this, it is possible to install fluid bag assemblies and blowers at high density. Attached Figure Description

[0110] Figure 1 This is a perspective view of a seat according to one embodiment; Figure 2 This is a perspective view of the frame of the seat according to this embodiment; Figure 3 This is a front view of the seat back frame; Figure 4 This is a front view of the seat back frame with the fluid pockets omitted. Figure 5 This is a perspective view showing the fluid bag assembly and the shoulder support member; Figure 6 This is a perspective view showing the rear surface of the shoulder support member; Figure 7 This is a rear view of the upper part of the seat back frame; Figure 8 This is an exploded perspective view of the fluid bag assembly; Figure 9 This is an explanatory diagram showing a fluid bag assembly (A) in a contracted state, a fluid bag assembly (B) in a partially expanded state, and a fluid bag assembly (C) in an expanded state. Figure 10 This is a cross-sectional view of the fluid bag assembly in an expanded state; Figure 11 This is a perspective view showing the rear surface of the improved shoulder support member; Figure 12 This is a cross-sectional view of the fluid bag assembly in an expanded state; Figure 13This is a cross-sectional view of the fluid bag assembly in an expanded state; and Figure 14 This is a front view of the seat back frame according to a partially improved embodiment. Specific Implementation

[0111] Hereinafter, embodiments in which the vehicle seat according to the invention is applied to a car seat will be described with reference to the accompanying drawings. In the following description, the up-down direction is the direction along the vertical direction. Furthermore, the front-back direction is the direction perpendicular to the vertical direction, the direction in which the seat back is positioned relative to the seat cushion is the rearward direction, and the direction opposite to the rearward direction is the forward direction. Furthermore, the lateral direction is the direction perpendicular to both the up-down and front-back directions, and is defined based on the forward direction.

[0112] like Figure 1 As shown, seat 1 includes a seat cushion 3 mounted on the vehicle floor 2 and a seat back 4 extending upward from the rear of the seat cushion 3. The seat cushion 3 supports the occupant's buttocks, while the seat back 4 supports the occupant's back. Figure 2 As shown, the seat cushion 3 can be mounted on the base plate 2 via a slide rail 5. The slide rail 5 includes left and right lower rails 5A connected to the base plate 2, and left and right upper rails 5B supported by the left and right lower rails 5A respectively so as to be slidably movable. The seat cushion 3 is connected to the left and right upper rails 5B. A lifting device can be positioned between the seat cushion 3 and the upper rails 5B.

[0113] The seat cushion 3 includes a seat cushion frame 11 forming a skeleton, a pad 12 supported on the seat cushion frame 11, and a cover member 13 covering the surface of the pad 12. The seat back 4 includes a seat back frame 15 forming a skeleton, a pad 16 supported on the seat back frame 15, and a cover member 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 a tilting device 19 and constitute the frame 20 of the seat 1. In the following description, the seat back 4 is arranged in an initial position in which it extends upward and downward.

[0114] like Figure 2 and 3 As shown, the seat back frame 15 includes left and right rear members 22 extending upward and downward, an upper cross member 23 extending laterally and connected to the upper end of each of the left and right rear members 22, a lower cross member 24 extending laterally and connected to the lower part of each of the left and right rear members 22, and a middle cross member 25 extending laterally between the upper cross member 23 and the lower cross member 24 and connected to each of the left and right rear members 22.

[0115] The lower portions of the left and right rear members 22 are formed of sheet metal members having surfaces facing left and right, respectively. The upper portions of the left and right rear members 22 and the upper transverse member 23 are formed of continuous tubular members. The tubular members include a laterally extending central portion and left and right ends that bend relative to the central portion and extend downward. The left and right ends of the tubular members are connected to the laterally inwardly facing surfaces of the left and right sheet metal members.

[0116] The upper cross member 23 is provided with a pair of left and right headrest support members 27. Each headrest support member 27 is formed in a tubular shape and extends upward and downward. Each headrest support member 27 is connected to the front surface of the upper cross member 23 by welding or the like. The headrest support members 27 are arranged laterally spaced in the transverse central portion of the upper cross member 23. Resin collars (not shown in the drawings) are mounted on each headrest support member 27. A pair of left and right struts 29A extending from the headrest 29 (see...) Figure 1 It is inserted into and supported by the headrest support member 27 via a collar.

[0117] like Figure 2 and 3 As shown, the seat back frame 15 includes at least one wire member 31 extending upward and downward and connecting to the lower cross member 24 and the middle cross member 25. In this embodiment, a pair of left and right wire members 31 are provided. Each wire member 31 is made of a metal rod and is flexible. Each of the left and right wire members 31 includes a first portion and a second portion that are inclined relative to each other via bends. In this embodiment, each of the left and right wire members 31 includes an upper end portion 31A that is connected to one of the left and right ends of the middle cross member 25 and extends downward; an upper middle portion 31B that extends laterally inward and downward in an inclined manner from the lower end of the upper end portion 31A; a lower middle portion 31C that extends downward from the lower end of the upper middle portion 31B; and a lower end portion 31D that extends laterally outward and downward from the lower end of the lower middle portion 31C and connects to the lower cross member 24. The upper end portion 31A and the upper middle portion 31B are inclined relative to each other via bends. Therefore, the upper end portion 31A corresponds to the first portion, and the upper middle portion 31B corresponds to the second portion. The left and right lower ends 31D can be connected to each other through the connecting part 31E.

[0118] like Figure 4 As shown, at least one shoulder support member 32 is disposed on the upper part of the wire member 31. In this embodiment, a pair of left and right shoulder support members 32 are disposed on the laterally corresponding wire members 31.

[0119] The left and right shoulder support members 32 are preferably made of, for example, metal or resin. In this embodiment, the shoulder support member 32 is made of resin. The left and right shoulder support members 32 are formed in a bilaterally symmetrical shape. Hereinafter, the right shoulder support member 32 will be described.

[0120] like Figures 4 to 6 As shown, the shoulder support member 32 includes a first plate member 32A facing the front-to-back direction and connected to the upper part of the wire member 31, and a second plate member 32C facing the front-to-back direction and connected to the first plate member 32A via a flexible member 32B. In the right shoulder support member 32, the first plate member 32A extends obliquely to the right and upward, the second plate member 32C is arranged on the right side and extends upward and downward, and the flexible member 32B extends upward and downward between the first plate member 32A and the second plate member 32C. The lateral inner edge 32D of the first plate member 32A is laterally obliquely outward in the upward direction. A rearwardly projecting plate-shaped fastening member 32E is provided on the inner edge 32D of the first plate member 32A. The fastening member 32E extends along the inner edge 32D.

[0121] The flexible component 32B has greater flexibility than the first plate component 32A and the second plate component 32C. Utilizing the elastic deformation of the flexible component 32B, the first plate component 32A can be displaced relative to the second plate component 32C.

[0122] like Figure 6 As shown, the first plate component 32A includes a first locking portion 34 for locking the upper end portion 31A as a first part and a second locking portion 35 for locking the upper middle portion 31B as a second part. Furthermore, the first plate component 32A includes a placement member 36 between the first locking portion 34 and the second locking portion 35, such that the placement member 36 contacts the upper end portion 31A and the upper middle portion 31B. The first locking portion 34 includes a pair of first resilient claws 34A projecting rearward from the rear surface of the first plate component 32A and a first contact member 34B projecting rearward from the rear surface of the first plate component 32A. The pair of first resilient claws 34A face each other and clamp the upper end portion 31A between them. The first contact member 34B contacts the upper end portion 31A clamped between the pair of first resilient claws 34A from the front, thereby determining the position of the first plate component 32A relative to the upper end portion 31A. The pair of first resilient claws 34A extend in the vertical direction.

[0123] The second locking part 35 includes a pair of second resilient claws 35A projecting rearward from the rear surface of the first plate member 32A and a second contact member 35B projecting rearward from the rear surface of the first plate member 32A. The pair of second resilient claws 35A face each other and clamp the upper middle portion 31B between them. The second contact member 35B contacts the upper middle portion 31B clamped between the pair of second resilient claws 35A from the front, thereby determining the position of the first plate member 32A relative to the upper middle portion 31B. The pair of second resilient claws 35A extend laterally inward and downward along the upper middle portion 31B.

[0124] The mounting member 36 includes a tubular base 36A projecting rearward from the rear surface of the first plate member 32A and a wall portion 36B projecting further rearward from a portion of the rear end edge of the base 36A. When viewed from the rear, the wall portion 36B extends upward and downward and curves laterally inward. The shoulder support member 32 is positioned relative to the wire member 31 by the rear end edge of the base 36A contacting the upper end portion 31A and the upper middle portion 31B from the front, the upper end edge of the wall portion 36B contacting the upper end portion 31A from the left, and the lower end edge of the wall portion 36B contacting the upper middle portion 31B from above and from the left.

[0125] like Figure 4 As shown, when viewed from the front, the first plate member 32A and the flexible member 32B are disposed between the left and right rear member 22, and at least a portion of the second plate member 32C is disposed in front of the right rear member 22. Preferably, when viewed from the front, the second plate member 32C extends along the right rear member 22. The second plate member 32C and the right rear member 22 contact each other in the front-rear direction. The second plate member 32C includes a rearwardly projecting mating portion 37 in its rear portion, and the second plate member 32C contacts the right rear member 22 at the mating portion 37. Preferably, the mating portion 37 is formed in a rearwardly extending tubular shape and contacts the front surface of the right rear member 22 at its rear end edge.

[0126] Preferably, when viewed from the front, the flexible member 32B extends upward and downward along the transverse inner edge of the right rear member 22. In this embodiment, the flexible member 32B has a slit 39 that extends through it in the front-rear direction and upward and downward, with an opening at its lower end. Due to the slit 39, the first plate member 32A and the second plate member 32C are connected to each other at their upper ends via the flexible member 32B. Thus, the first plate member 32A can be displaced forward and backward relative to the lower part of the second plate member 32C.

[0127] A rearwardly protruding edge wall 42 may be provided on the edge portions of the first plate member 32A and the second plate member 32C. The edge wall 42 increases the rigidity of the first plate member 32A and the second plate member 32C.

[0128] A plate-shaped lumbar support member 44 is supported on the lower part of the wire member 31, facing forward and backward. Specifically, left and right shoulder support members 32 are disposed on the lumbar support member 44. The lumbar support member 44 is disposed in the lower part of the seat back 4 and supports the occupant's buttocks. Preferably, the lumbar support member 44 is made of resin.

[0129] A blower 46 is disposed in the upper central portion of the seat back 4. The blower 46 includes a blower body 46A with an impeller and a duct 46B extending from the blower body 46A. The blower 46 is mounted to a bracket 46C, which is connected to at least one of the upper cross member 23 and the intermediate cross member 25. In this embodiment, the bracket 46C extends upward and downward and has an upper end connected to the lateral central portion of the upper cross member 23 and a lower end connected to the lateral central portion of the intermediate cross member 25. The blower body 46A may be, for example, a centrifugal fan. The blower body 46A is formed as a flattened cylinder and is fixed to the front surface of the bracket 46C such that its axis extends in the front-rear direction. The blower body 46A is disposed in the upper central portion of the seat back 4. More specifically, the blower body 46A is disposed between the upper cross member 23 and the intermediate cross member 25. Furthermore, the blower body 46A is preferably positioned between the left and right headrest support members 27 in the lateral direction. Additionally, the blower 46 is arranged between the left and right shoulder support members 32.

[0130] The duct 46B has one end connected to the central portion of the rear surface of the blower body 46A and the other end forming an intake 46D. The duct 46B includes a transverse member 46E extending to the right from one end behind the bracket 46C and the right headrest support member 27, and a vertical member 46F extending downward and forward from the right end of the transverse member 46E. That is, the duct 46B extends upward and downward on one side of the blower body 46A. The intake 46D is located at the lower end of the vertical member 46F. The vertical member 46F extends upward and downward at the right side of the blower body 46A, and the intake 46D is positioned lower than the lower end of the blower body 46A. In another embodiment, the transverse member 46E may extend to the left from the said end, such that the vertical member 46F is located to the left side of the blower body 46A. In this embodiment, the blower body 46A draws in air from the central portion via the duct 46B and exhausts air from the outer periphery. The exhaust air flows through a duct (not shown) connected to the outer periphery of the blower body 46A. In another embodiment, the duct 46B may be omitted, and the blower body 46A may directly draw in air.

[0131] A first side airbag 48 is provided on one of the left and right sides of the seat back 4, and a second side airbag 49 is provided on the other of the left and right sides of the seat back 4. In this embodiment, the first side airbag 48 is provided on the right side surface of the right rear member 22, and the second side airbag 49 is provided on the left side surface of the left rear member 22. Each of the first side airbag 48 and the second side airbag 49 extends upward and downward. The upper end of the first side airbag 48 is positioned higher than the upper end of the second side airbag 49. Furthermore, the first side airbag 48 is formed to be longer than the second side airbag 49 in the vertical direction. In this embodiment, the seat 1 is the left seat of the vehicle, the first side airbag 48 is a distal airbag away from the side wall of the vehicle, and the second side airbag 49 is a proximal airbag close to the side wall of the vehicle.

[0132] In seat 1, an inflatable and deflatable fluid bag assembly 52 is disposed between frame 20 and skin members 13, 17. The fluid bag assembly 52 is disposed on the front surface of shoulder support member 32. In this embodiment, the fluid bag assembly 52 includes a group consisting of the pair of left and right shoulder support members 32 and the fluid bag assembly 52, and a single fluid supply device 53 connected to the left and right fluid bag assemblies 52. The group of left and right shoulder support members 32 and fluid bag assembly 52 is disposed between shoulder support member 32 and padding 12. In this embodiment, the fluid supplied to the fluid bag assembly 52 is air, and the fluid supply device 53 includes an air pump. In another embodiment, the fluid may be a liquid, such as water or oil. The fluid supply device 53 is preferably disposed on the inner surface of one of the left and right rear members 22. Preferably, a drive device 19A for driving the tilting device 19 is disposed on the inner surface of the other of the left and right rear members 22. That is, the fluid supply device 53 and the drive device 19A are disposed on the inner surfaces of different rear members 22. Preferably, the drive unit 19A includes an electric motor and a reduction gear mechanism.

[0133] Each shoulder support member 32 includes a support surface 32F extending along a first direction and facing forward. The support surface F is formed by the front surfaces of a first plate member 32A, a flexible member 32B, and a second plate member 32C. Here, one side in the first direction is referred to as the first side, and the other side in the first direction is referred to as the second side. In this embodiment, the left and right shoulder support members 32 are disposed on the left and right sides of the upper portion of the seat back 4 such that each support surface 32F faces forward and the first side points laterally inward and downward. Each shoulder support member 32 includes a side surface 51B perpendicular to the support surface 32F. In this embodiment, the shoulder support member 32 extends along the first direction.

[0134] Left and right shoulder support members 32 are respectively arranged on the left and right sides of the blower 46. Furthermore, the left and right shoulder support members 32 are positioned on the left and right sides of the duct 46B. The right shoulder support member 32 is positioned on the right side of the duct 46B, and the left shoulder support member 32 is positioned on the left side of the duct 46B. Preferably, the lower ends of each of the left and right shoulder support members 32 are positioned higher than the upper ends of the waist support member 44. Also preferably, the lower ends of each of the left and right shoulder support members 32 are positioned higher than the upper ends of the second side airbag 49.

[0135] like Figure 5 and 8 As shown, the fluid bag assembly 52 includes a first fluid bag 56, a second fluid bag 57, and a third fluid bag 58. The first fluid bag 56 is disposed on the support surface 32F of the shoulder support member 32. The second fluid bag 57 includes a first connecting portion 61 connected to and communicating with the first fluid bag 56 at its end on a first side. The third fluid bag 58 includes a second connecting portion 62 connected to and communicating with the second fluid bag 57 at its end on a first side. Each of the first to third fluid bags 56 to 58 is formed by welding the edge portions of overlapping sheets. For example, the fluid bag may be formed from two sheets that overlap each other and whose edge portions are joined together. Alternatively, the fluid bag may be formed from a single sheet that is folded such that the folds overlap and whose edge portions are joined together.

[0136] The first fluid bag 56 includes a first sheet 56A and a second sheet 56B that overlap each other. The first sheet 56A and the second sheet 56B are connected to each other by a third connecting member 56C, which extends along the respective edge portions and forms a closed loop. The third connecting member 56C is preferably a component where the first sheet 56A and the second sheet 56B are welded or bonded to each other. An inlet tube 63, which is a tube open at both ends, is inserted between the edge portions of the first sheet 56A and the second sheet 56B so as to cross the third connecting member 56C. The outer peripheral surface of the inlet tube 63, the first sheet 56A, and the second sheet 56B are hermetically sealed.

[0137] The first fluid bag 56 contacts the support surface 32F at the first sheet 56A and extends in a first direction. At least one of the first sheet 56A and the second sheet 56B includes a tongue 56D that projects laterally in the middle portion in the first direction. In this embodiment, the tongue 56D is disposed on the lateral inner edge of the middle portion in the first direction of each of the first sheet 56A and the second sheet 56B. The tongues 56D of the first sheet 56A and the second sheet 56B are preferably connected to each other. The tongue 56D is bent into a fastening member 32E along the shoulder support member 32 and is fastened to the fastening member 32E by means of a fastening member 65 such as a clip or a rivet. The first fluid bag 56 is secured to the shoulder support member 32 by means of the tongue 56D. When viewed in a direction perpendicular to the support surface 32F of the shoulder support member 32, the end of the first fluid bag 56 on the first side is arranged in a position coinciding with the end of the shoulder support member 32 on the first side, and the end of the first fluid bag 56 on the second side is arranged in a position coinciding with the end of the shoulder support member 32 on the second side.

[0138] The second fluid bag 57 includes a third sheet 57A and a fourth sheet 57B stacked on top of each other. The third sheet 57A and the fourth sheet 57B are connected to each other by a fourth connecting member 57C, which extends along corresponding edge portions and forms a closed loop. The fourth connecting member 57C is preferably a component where the third sheet 57A and the fourth sheet 57B are welded or bonded to each other. The second fluid bag 57 extends in a first direction and overlaps the first fluid bag 56. The third sheet 57A of the second fluid bag 57 contacts the second sheet 56B of the first fluid bag 56. When viewed from a direction perpendicular to the support surface 32F of the shoulder support member 32, the end of the second fluid bag 57 on the first side is arranged in a position coinciding with the end of the first fluid bag 56 on the first side, and the end of the second fluid bag 57 on the second side is arranged in a position coinciding with the end of the first fluid bag 56 on the second side.

[0139] The ends of the third sheet 57A and the second sheet 56B on the first side are connected to each other by a first connecting member 61. The first connecting member 61 is preferably a component where the third sheet 57A and the second sheet 56B are welded or bonded to each other. The first connecting member 61 has a first side edge 61A as a side edge on the second side. The first side edge 61A extends in a straight line. The first fluid bag 56 and the second fluid bag 57 are connected by a first communicating hole 61B passing through the first connecting member 61. The first communicating hole 61B is formed in the second sheet 56B and the third sheet 57A.

[0140] The third fluid bag 58 includes a fifth sheet 58A and a sixth sheet 58B that overlap each other. The fifth sheet 58A and the sixth sheet 58B are connected to each other by a fifth connecting member 58C, which extends along the respective edge portions and forms a closed loop. The fifth connecting member 58C is preferably a component where the fifth sheet 58A and the sixth sheet 58B are welded or bonded to each other. The third fluid bag 58 extends in a first direction and overlaps 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 perpendicular to the support surface 32F of the shoulder support member 32, the end of the third fluid bag 58 on the first side is offset to the second side relative to the end of the second fluid bag 57 on the first side, and the end of the third fluid bag 58 on the second side is positioned to coincide with the end of the second fluid bag 57 on the second side. 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.

[0141] The end of the fifth sheet 58A on the first side and the middle portion of the fourth sheet 57B in the first direction are connected to each other by a second connecting member 62. The second connecting member 62 is preferably a member where the fourth sheet 57B and the fifth sheet 58A are welded or bonded to each other. The second connecting member 62 has a second side edge 62A as a side edge on the second side. The second side edge 62A extends in a straight line. The second fluid bag 57 and the third fluid bag 58 are connected by a second communicating hole 62B passing through the second connecting member 62. The second communicating hole 62B is formed in the fourth sheet 57B and the fifth sheet 58A.

[0142] The inlet pipes 63 of the left and right fluid bag assemblies 52 are connected to the fluid supply device 53 via conduits 67. The fluid bag assemblies 52 expand when liquid is supplied and contract when liquid is discharged.

[0143] like Figure 3 and Figure 9 As shown in (A), when the fluid bag assembly 52 is in the contracted state, when viewed from a direction perpendicular to the support surface 32F of the shoulder support member 32, the first side edge 61A and the second side edge 62A extend in different directions from each other. That is, when viewed from a direction perpendicular to the support surface 32F of the shoulder support member 32, the angle defined between the first side edge 61A and the first direction is different from the angle defined between the second side edge 62A and the first direction. Moreover, the second side edge 62A is configured to be further away from the first side edge 61A on the second side.

[0144] The first side edge 61A and the second side edge 62A are preferably positioned below the central axis of the blower body 46A. Furthermore, the first side edge 61A and the second side edge 62A are preferably positioned below the upper end of the first side airbag 48. Additionally, the upper end of the fluid bag assembly 52 is preferably positioned below the central axis of the blower body 46A. Furthermore, the upper end of the fluid bag assembly 52 is preferably positioned below the upper end of the first side airbag 48.

[0145] The first to third fluid bags 56 to 58 each have a planar shape and overlap each other in the contracted state. When the fluid supply device 53 is activated and air is supplied to the fluid bag assembly 52, the fluid bag assembly 52 expands. Air supplied from the fluid supply device 53 via the conduit 67 flows into the first fluid bag 56 through the inlet pipe 63, into the second fluid bag 57 through the first connecting hole 61B, and into the third fluid bag 58 through the second connecting hole 62B. Thus, the fluid bag assembly 52 expands.

[0146] In the expanded state, the thickness of each of the first to third fluid bags 56 to 58 gradually increases from the edge towards the center. As a result, as Figure 10 As shown, in the inflated state, the second fluid bag 57 bends around the first side edge 61A, such that the end of the second fluid bag 57 on the second side separates from the end of the first fluid bag 56 on the second side. Furthermore, the third fluid bag 58 bends around the second side edge 62A, such that the end of the third fluid bag 58 on the second side separates from the end of the second fluid bag 57 on the second side. Therefore, the end of the fluid bag assembly 52 on the second side extends further in the direction perpendicular to the support surface 32F of the shoulder support member 32 than the end of the fluid bag assembly 52 on the first side.

[0147] With the left and right fluid bag assemblies 52 in a contracted state, when viewed from the front, each of the first side edge 61A and the second side edge 62A extends obliquely downward in a laterally outward direction. Therefore, during expansion, the end of the second fluid bag 57 on the second side moves or rotates laterally inward and downward about the first side edge 61A. Similarly, during expansion, the end of the third fluid bag 58 on the second side moves or rotates laterally inward and downward about the second side edge 62A. Because the first side edge 61A and the second side edge 62A extend in different directions from each other, the ends of the second fluid bag 57 and the third fluid bag 58 on the second side move in different directions. In this embodiment, during expansion, the end of the second fluid bag 57 on the second side moves forward and laterally inward and downward, while the end of the third fluid bag 58 on the second side moves forward and laterally inward. Therefore, the fluid bag assembly 52... Figure 9 The expansion is shown in (A) to 9(C).

[0148] like Figure 2 As shown, the seat cushion frame 11 includes left and right seat cushion side members 71 extending in a front-rear direction, a front member 72 extending laterally and connecting the front ends of the left and right seat cushion side members 71 to each other, a rear member 73 extending laterally and connecting the rear ends of the left and right seat cushion side members 71 to each other, and a movable frame 74 supported on the front member 72 for forward and rearward movement. Between the front member 72 and the rear member 73, a shoulder support member 75 for supporting the occupant's buttocks extends. The shoulder support member 75 preferably includes a plate-like member made of resin and a plurality of wire springs connected to the plate-like member.

[0149] The movable frame 74 includes an upper plate 74A disposed on the upper surface of the front member 72 and supported for forward and rearward movement relative to the front member 72, and a front plate 74B extending downward from the front end of the upper plate 74A to be disposed in front of the front member 72. The left and right ends of the rear portion of the upper plate 74A extend further rearward than the central portion of the upper plate 74A. When viewed in the lateral direction, the front plate 74B is formed into a forward-convex arcuate shape.

[0150] like Figure 12 and 13 As shown, a downwardly recessed receiving recess 72A is formed in the transverse central portion of the upper surface of the front member 72. The front and rear ends of the receiving recess 72A are accessible to the front and rear ends of the front member 72. A pair of left and right tracks 77A extending in the front-rear direction are provided on the portions of the upper surface of the front member 72 located to the left and right of the receiving recess 72A. Each of the left and right tracks 77A is provided with a slider 77B so that it can move forward and backward relative to the track 77A. The upper plate 74A of the front member 72 is connected to the left and right sliders 77B by bolts 78. Thus, a movable frame 74 is provided on the front member 72 so that it can move forward and backward by means of the sliders 77B and the tracks 77A. The receiving recess 72A is provided in the portion of the front member 72 located below the upper plate 74A.

[0151] As the upper plate 74A moves forward and backward, the movable frame 74 moves relative to the front member 72 between an initial position and a protruding position. The movable frame 74 moves forward from the initial position to reach the protruding position. Furthermore, the movable frame 74 moves backward from the protruding position to return to the initial position.

[0152] The seat cushion 3 has a pad 12 configured to cover the upper and front surfaces of the movable frame 74. When the movable frame 74 moves from its initial position to its protruding position, it slides relative to the pad 12. Even when the movable frame 74 is in its protruding position, the pad 12 has sufficient length to cover the front panel 74B of the movable frame 74. Preferably, when the movable frame 74 is in its initial position, the front edge of the pad 12 extends downward beyond the lower edge of the front panel 74B of the movable frame 74.

[0153] The seat 1 also includes actuators 80 for moving the movable frame 74 forward and backward relative to the front member 72. The actuator 80 includes a first actuator 81 that pushes the movable frame 74 forward, a second actuator 82 that pushes the movable frame 74 backward, a housing 85 that houses the first actuator 81 and the second actuator 82, and a control device (not shown) for controlling the pushing force generated by each of the first actuator 81 and the second actuator 82.

[0154] like Figure 12 As shown, each of the first actuator 81 and the second actuator 82 is formed by a fluid bag assembly that expands when supplied with compressed air and contracts when the compressed air is discharged. Preferably, the control device includes a compressor for generating compressed air, a connecting pipe connecting the compressor to the first actuator 81, a connecting pipe connecting the compressor to the second actuator 82, a control valve disposed in each connecting pipe, an electronic control unit (ECU) for controlling the compressor and the control valve, and an operating switch for inputting signals to the ECU, etc.

[0155] A housing 85 is disposed in a receiving recess 72A and includes a bottom wall 85A extending in a front-rear direction, 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 receiving recess 72A. Furthermore, the housing 85 preferably includes left and right end walls 85D extending in a front-rear direction along the left and right edges of the bottom wall 85A, respectively, and each end wall is connected to the front wall 85B and the rear wall 85C. The bottom wall 85A, front wall 85B, rear wall 85C, and left and right end walls 85D cooperate with each other to form an upwardly opening box structure.

[0156] A downwardly extending pressure plate 74C is provided in the central portion of the rear end of the upper plate 74A of the movable frame 74. The pressure plate 74C is disposed between the front wall 85B and the rear wall 85C. Furthermore, the pressure plate 74C is arranged between the left and right end walls 85D. A first actuator 81 is disposed between the front wall 85B and the pressure plate 74C, and a second actuator 82 is disposed between the pressure plate 74C and the rear wall 85C.

[0157] According to the extension and retraction of the first actuator 81 and the second actuator 82, the pressure plate 74C moves relative to the front wall 85B and the rear wall 85C, and the movable frame 74 moves forward and backward relative to the front member 72.

[0158] When compressed air is supplied to the corresponding first actuator 81 and second actuator 82, the first actuator 81 and second actuator 82 expand. When the control valve is in the holding state, airflow to the corresponding first actuator 81 and second actuator 82 is prevented, and the first actuator 81 and second actuator 82 maintain their dimensions. When the control valve is in the venting state, the compressed air in the corresponding first actuator 81 and second actuator 82 is discharged to the outside, and the first actuator 81 and second actuator 82 contract.

[0159] The rear end of the cover member 86 is connected to the rear portion of the receiving recess 72A. The cover member 86 includes a flange 86A that is fastened to the portion of the receiving recess 72A behind the rear wall 85C of the housing 85, a vertical plate member 86B that extends upward from the front edge of the flange 86A behind the rear wall 85C, and a transverse plate member 86C that extends forward from the upper end of the vertical plate member 86B to be disposed above the upper plate 74A of the movable frame 74. The transverse plate member 86C covers the rear portion of the upper plate 74A. The transverse plate member 86C supports the gasket 12 from below.

[0160] In the shoulder support member 32 of the aforementioned seat 1, the second plate member 32C can be displaced relative to the first plate member 32A by the deformation of the flexible member 32B. Therefore, when the shoulder support member 32 is pushed by the shoulder of the person sitting, the first plate member 32A and the second plate member 32C can move along the shoulder. Thus, a seat 1 that can comfortably support the shoulder of the person sitting can be provided.

[0161] Since, when viewed from the front, the first plate member 32A and the flexible member 32B are positioned between the left and right rear members 22, and at least a portion of the second plate member 32C is positioned in front of the rear member 22, the first plate member 32A can be moved rearward relative to the second plate member 32C along the back of the seated person. Furthermore, when viewed from the front, since the flexible member 32B extends upward and downward along the lateral inner edge of the rear member 22, the first plate member 32A can be moved rearward without interfering with the rear member 22. Because the flexible member 32B has a slit 39, the first plate member 32A can be easily moved relative to the second plate member 32C.

[0162] Since the second plate component 32C and the rear member 22 are in contact with each other in the front-rear direction, the position of the second plate component 32C in the seat back 4 can be fixed. When viewed from the front, the second plate component 32C extends along the rear member 22. Since the second plate component 32C is located between the shoulder of the seated person and the rear member 22, it can comfortably support the shoulder of the seated person.

[0163] Since the left and right shoulder support members 32 are respectively provided on the left and right wire members 31, the left and right shoulder support members 32 can be moved independently of each other along the shoulders of the seated person.

[0164] The fluid bag assembly 52 allows the portion of the seat back 4 corresponding to the occupant's shoulders to bulge laterally inward and downward. This provides a seat back 4 that conforms to the position and shape of the occupant's shoulders. Since each of the left and right fluid bag assemblies 52 expands forward and laterally inward and downward, the fluid bag assemblies 52 are positioned, according to the occupant's body shape, without interfering with other devices such as the blower unit, lumbar support member 44, and proximal airbag.

[0165] In the seat 1 according to this embodiment, since the first side edge 61A and the second side edge 62A extend in different directions, it is possible to change the expansion direction of the second fluid bag 57 and the third fluid bag 58. This allows for diverse shapes of the fluid bag assembly 52 during expansion. The first to third fluid bags 56 to 58 are connected at the first connecting member 61 and the second connecting member 62, and the first connecting hole 61B and the second connecting hole 62B are respectively formed in the first connecting member 61 and the second connecting member 62, thereby simplifying the structure. The tongue 56D of the first fluid bag 56 is bent and fixed to the side surface 51B perpendicular to the support surface 32F, thereby enabling the shoulder support member 51 to be manufactured compactly in terms of size.

[0166] The fluid bag assembly 52 allows the portion of the seat back 4 corresponding to the occupant's shoulders to bulge laterally inward and downward. This provides a seat back 4 that conforms to the position and shape of the occupant's shoulders. Since each of the left and right fluid bag assemblies expands forward and laterally inward and downward, the fluid bag assembly 52 is positioned, according to the occupant's body shape, without interfering with other devices such as the blower unit, lumbar support member 44, and proximal airbag.

[0167] Specific embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments and can be modified and varied in various ways. In another embodiment, the upper cross member 23 and the middle cross member 25 can be integrally formed. Furthermore, the middle cross member 25 can be omitted, and the upper end of the wire member 31 can be connected to the upper cross member 23.

[0168] like Figure 11 As shown, the second plate component 32C and the right rear member 22 are in contact with each other in the front-rear direction via a cushioning material 38. The cushioning material 38 is preferably a flexible component, such as non-woven fabric or a rubber sheet. The cushioning material 38 is preferably inserted between the mating portion 37 and the front surface of the right rear member 22. When the second plate component 32C contacts the front surface of the right rear member 22 via the cushioning material 38, the generation of friction noise and clicking noise can be prevented.

[0169] Furthermore, a reinforcing structure 41 may be provided on the rear surface of the second plate component 32C. The reinforcing structure 41 increases the rigidity of the second plate component 32C. Preferably, the reinforcing structure 41 is a rib protruding from the rear surface of the second plate component 32C. The reinforcing structure 41 is preferably provided on the upper part of the rear surface of the second plate component 32C.

[0170] The fluid bag assembly 52 may be disposed in the seat cushion 3 and / or headrest 29. Furthermore, the fluid bag assembly 52 may include four or more fluid bags, not limited to three fluid bags 56 to 58. For example, the fluid bag assembly 52 may include a fourth fluid bag connected to the third fluid bag 58 and a fifth fluid bag connected to the fourth fluid bag.

[0171] In embodiments that improve upon some of the above embodiments, such as Figure 14 As shown, the fluid bag assembly 52 can be positioned close to the outer edge of the blower 46. In this case, it is preferable that each fluid bag assembly 52 has a laterally outwardly recessed recess 101 in its laterally inner edge, and the left and right sides of the blower 46 are disposed in the corresponding recesses 101. Each recess 101 is preferably formed in a shape along the outer edge of the blower 46. For example, it is preferable that the blower 100 is formed as a cylinder, and each recess 101 is formed as an arc with a radius the same as that of the blower 100. Thus, it is possible to increase the size of each fluid bag assembly 52 while avoiding interference between the fluid bag assembly 52 and the blower 46. Furthermore, the support plate 102 of the waist support member 44 can extend laterally such that the left and right ends reach the left and right rear members 22. The blower 46 can be supported on the support plate 102. In addition, the support plate 102 of the waist support member 44 can constitute a shoulder support for each fluid bag assembly 52. In this case, it is preferable that the fluid bag assembly 52 is connected to the support plate 102. List of reference numerals

[0172] 1 Seat 3. Seat cushion 4. Seat backrest 15 Seat backrest frame 22 Rear side components 23 Upper transverse component 24 Lower transverse members 25. Intermediate cross-section component 31 Wire Components 31A Upper end 31B Upper Middle Section 31C Lower middle section 31D lower end 31E Connecting part 32 Shoulder support components 32A First Plate Component 32B Flexible Component 32C Second Plate Component 32D inner edge 32E Fastening Components 34 First Locking Section 35 Second Locking Section 36. Installation components 37. Docking section 38. Cushioning material 39 Slits 41. Strengthen the structure 44 Waist support components 46. ​​Blower 52 Fluid Bag Assembly

Claims

1. A vehicle seat, comprising a seat cushion and a seat back, wherein, The seat back includes: Left and right side components, extending upwards and downwards; The lower transverse member extends laterally and connects to the left and right side members; A transverse member that extends laterally above the lower transverse member and connects to the left and right side members; At least one wire member extending upward and downward and connected to the lower cross member and the cross member; and At least one shoulder support member is supported on the upper part of the wire member, and The shoulder support member includes: A first plate component, facing forward and backward and connected to the upper part of the wire component; and The second plate component faces the front-back direction and is connected to the first plate component via a flexible component.

2. The vehicle seat according to claim 1, wherein, A plate-shaped waist support member facing the front-back direction is supported on the lower part of the wire member.

3. The vehicle seat according to claim 1 or 2, wherein, The wire component includes a first part and a second part that are inclined relative to each other via a bend, and The first plate component of the shoulder support member includes a first locking part for locking the first part and a second locking part for locking the second part.

4. The vehicle seat according to claim 3, wherein, The first plate component of the shoulder support member includes a placement component located between the first locking portion and the second locking portion, the placement component contacting the first portion and the second portion.

5. The vehicle seat according to any one of claims 1 to 4, wherein, When viewed from the front, the first plate component and the flexible component are arranged between the left and right side members, and at least a portion of the second plate component is disposed in front of the side members.

6. The vehicle seat according to claim 5, wherein, When viewed from the front, the flexible component extends upward and downward along the lateral inner edge of the side member.

7. The vehicle seat according to claim 6, wherein, The flexible component has a slit that penetrates the flexible component in the front-back direction and extends upward and downward with an opening at the lower end.

8. The vehicle seat according to any one of claims 1 to 7, wherein, A fluid bag assembly that expands when liquid is supplied is provided on the front surface of the shoulder support member.

9. The vehicle seat according to claim 8, wherein, The shoulder support member includes a support surface extending in a first direction and facing forward. A fluid supply device is connected to the fluid bag assembly. One side in the first direction is referred to as the first side, and the other side in the first direction is referred to as the second side. The fluid bag assembly includes: A first fluid bag is disposed on the support surface; A second fluid bag, having at its end on the first side including a first connecting member connected to and in communication with the first fluid bag; and The third fluid bag includes a second connecting member at its end on the first side, which is connected to and communicates with the second fluid bag. In the contracted state of the fluid bag assembly, when viewed in a direction perpendicular to the support surface, the first side edge and the second side edge each extend in a straight line and in different directions from each other, wherein the first side edge is the side edge of the first connecting member on the second side, and the second side edge is the side edge of the second connecting member on the second side.

10. The vehicle seat according to claim 9, wherein, The second side edge is arranged to be further away on the second side than the first side edge.

11. The vehicle seat according to claim 9 or 10, 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.

12. The vehicle seat according to any one of claims 9 to 11, wherein, The fluid supply device is connected to the first fluid bag. The first fluid bag and the second fluid bag are connected by a first through-hole passing through the first connecting member, and The second fluid bag and the third fluid bag are connected by a second through hole passing through the second connecting member.

13. The vehicle seat according to any one of claims 9 to 12, wherein, The first fluid bag, the second fluid bag, and the third fluid bag extend in the first direction.

14. The vehicle seat according to any one of claims 9 to 13, wherein, The first fluid bag includes a protruding tab to one side, and The tongue is fastened to a side surface perpendicular to the support surface of the shoulder support member.

15. The vehicle seat according to any one of claims 9 to 14, wherein, The shoulder support members include a pair of left and right shoulder support members, and the fluid bag assembly includes a pair of left and right fluid bag assemblies. The left and right shoulder support members are arranged on the upper left and right sides of the seat back, such that the first side becomes the lateral inner and lower side, and When the fluid bag assembly is in its contracted state, each of the first and second side edges extends downward at an angle in a laterally outward direction when viewed from the front.

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