JP2024045674A - vehicle seat - Google Patents

Abstract

To provide a vehicle seat which can reduce an influence due to contact with other member of a duct.SOLUTION: A vehicle seat includes a pair of side frames 11, a support member 30 for receiving a load from an occupant, and a duct D extending to a seat back from a seat cushion S1. The duct D has a wide part 115 which is arranged on the lower side of the seat cushion S1 and at a position closer to the one side frame 11 than a central part in a lateral direction and longitudinally extends, and has a lateral dimension larger than a vertical dimension, narrow parts 131 and 132 having a lateral dimension smaller than a longitudinal direction, and a connection part 120 for connecting the narrow parts 131 and 132 and the wide part 115. The duct D extends obliquely backward from a part connected to an air blower 70, and is connected to the wide part 115. The support member 30 has resin members 32C and 32D on one end in the longitudinal direction, and the resin members 32C and 32D are arranged at positions overlapping the wide part 115 when being viewed from a vertical direction.SELECTED DRAWING: Figure 7

Description

The present invention relates to a vehicle seat including a seat cushion and a seat back.

Conventionally, a seat cushion and a seat back in which an air outlet and an air passage are formed, an air blower attached to the bottom of the seat cushion, and a duct that communicates the air blower with the air passage of the seat back are provided. 2. Description of the Related Art A vehicle seat is known that is configured to send conditioned air to an air outlet through an air passage or a duct (Patent Document 1).

Japanese Patent Application Publication No. 2009-023477

However, in conventional technology, there is a risk that the feet of rear seat passengers may hit the duct that connects the air blower to the seat back's air passage, so a configuration that can prevent the feet of rear seat passengers from hitting the duct is desired. Also, even in a configuration that includes a duct, it is desirable to be able to make the seat more compact.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vehicle seat that can prevent the feet of rear seat occupants from hitting the duct.
Another object of the present invention is to make a vehicle seat more compact.
Another object of the present invention is to suppress interference between the duct and other members.
Another object of the present invention is to improve the rigidity of the duct.
Another object of the present invention is to ensure the flow rate of air flowing inside the duct.
Another object of the present invention is to suppress deformation of the duct.
Another object of the present invention is to reduce the influence caused by contact between the duct and other members.
Another object of the present invention is to easily connect a ventilation path and a duct.
Another object of the present invention is to allow air to flow well within the duct.

To achieve the above object, the present invention provides a vehicle seat including a seat cushion and a seat back, the vehicle seat including a pair of side frames, and a seat cushion that passes through the rear side of the frame of the seat cushion and extends from the seat cushion to the seat back. a duct extending toward the air blower and connecting a ventilation path formed in at least one of the seat cushion and the seat back to the air blower; The present invention is characterized in that it has a retraction portion located inside the side frames in the left-right direction and closer to one of the side frames than to the center of the pair of side frames in the left-right direction.

With this configuration, the retraction portion of the duct is positioned toward one of the side frames at the rear of the seat cushion, preventing the feet of rear seat passengers from hitting the duct. In addition, because the retraction portion is positioned on the inside of the pair of side frames in the left-right direction, the vehicle seat can be made more compact in the left-right direction compared to when it is positioned on the outside in the left-right direction.

In the vehicle seat described above, the retractable portion can be configured to extend downward and be positioned forward.

According to this, the retraction part of the duct is placed at the rear of the seat cushion so as to be away from the feet of the rear seat occupant, so it is possible to further prevent the rear seat occupant's feet from hitting the duct. .

In the vehicle seat described above, the pair of side frames include a pair of cushion side frames that constitute the left and right frames of the seat cushion, the vehicle seat further includes a support member that is disposed between the pair of cushion side frames and receives the load from the occupant, and the duct is disposed below the support member and has a lower inclined portion that extends downward toward the rear.

According to this, interference between the duct and the support member can be suppressed.

In the vehicle seat described above, the duct can be arranged below the seat cushion, extending in the front-rear direction and having a wide portion whose left-right dimension is greater than its up-down dimension.

As a result, the wide portion located below the seat cushion has a small vertical dimension, so it can be made thinner both vertically. This allows the vehicle seat to be made more compact both vertically.

In the vehicle seat described above, the pair of side frames include a pair of cushion side frames that constitute left and right frames of the seat cushion, and the vehicle seat is arranged between the pair of cushion side frames, and further comprising a support member that receives a load from the support member, and the wide portion is located below the support member at a position closer to the one side frame than to the center of the pair of side frames in the left-right direction. can do.

When the support member receives a load from the occupant, the center portion of the seat cushion will bend more than the left and right ends, but by positioning the wide portion closer to one of the side frames, interference between the duct and the support member can be reduced.

In the vehicle seat described above, the retraction portion has a narrow portion whose width in the left-right direction is smaller than the dimension in the direction perpendicular to the left-right direction, and the duct is a connection connecting the narrow portion and the wide portion. The connecting portion may have a configuration in which the dimension in the left-right direction increases and the dimension in the vertical direction decreases from the narrow width portion toward the wide width portion.

By doing this, the cross-sectional shape of the duct gradually changes from the narrow portion to the wide portion, so the rigidity of the duct can be improved compared to when the cross-sectional shape does not change. In addition, the flow path cross-sectional area of the duct can be prevented from becoming smaller at the connection portion, so the flow rate of air flowing through the duct can be secured. In addition, the narrow portion has a shape that is resistant to loads from directions perpendicular to the left and right direction, so deformation of the duct can be prevented even if the feet of a passenger in the rear seat hit the narrow portion.

The vehicle seat described above is arranged between the pair of side frames and includes a support member that receives a load from an occupant, the duct has a portion that is arranged on the side of the support member opposite the occupant side, the support member has a plurality of wire members arranged and a resin member that connects the wire members, and the resin member is arranged so as to overlap the duct when viewed from the occupant side.

According to this, even if the supporting member bends and interferes with the duct, the resin member will come into contact with the duct first, so the impact caused by the contact between the duct and the supporting member, such as the generation of sound, etc. It is possible to reduce the impact caused by contact.

In the vehicle seat described above, the duct has a lower pipe portion disposed under the seat cushion, and the lower pipe portion can be configured to have a first portion extending in the front-rear direction and a front end connected to the air blower, a second portion extending diagonally rearward from the rear end of the first portion toward the outside in the left-right direction, a third portion extending rearward from the rear end of the second portion, and a branch pipe portion extending upward from the third portion and connected to an air passage formed in the seat cushion.

This allows the branch pipe section to be provided in a position that avoids wire members, etc., arranged inside the seat cushion, making it easy to connect the duct to the air passage formed in the seat cushion.

In the vehicle seat described above, the lower pipe portion includes a fourth portion extending diagonally rearward from the rear end of the third portion outward in the left-right direction, and a fifth portion extending rearward from the rear end of the fourth portion. The configuration can include a portion.

According to this, the duct can be arranged so as to gradually approach one side frame, so that sudden changes in the flow path can be suppressed, and air can be smoothly flowed within the duct.

This invention can prevent the feet of rear seat passengers from hitting the duct. It also makes it possible to make the vehicle seat more compact.

In addition, according to the present invention, the retractable portion extends downward and is positioned forward, which further prevents the feet of rear seat passengers from hitting the duct.

Further, according to the present invention, interference between the duct and the support member can be suppressed because the duct has a lower inclined portion that extends downward toward the rear of the support member.

Further, according to the present invention, since the duct has a wide portion below the seat cushion, the vehicle seat can be made more compact.

In addition, according to the present invention, the wide portion is positioned on the underside of the support member closer to one of the side frames than the center in the left-right direction, which makes it possible to suppress interference between the duct and the support member.

Further, according to the present invention, since the duct has a wide portion, a narrow portion, and a connecting portion, the rigidity of the duct can be improved. Moreover, the flow rate of air flowing inside the duct can be ensured. Further, deformation of the duct can be suppressed.

In addition, according to the present invention, the resin member of the support member is positioned so that it overlaps with the duct when viewed from the passenger side, thereby reducing the effects of contact between the duct and the support member.

In addition, according to the present invention, the lower pipe portion of the duct has a first portion, a second portion, a third portion, and a branch pipe portion extending from the third portion, so that the duct can be easily connected to the air passage formed in the seat cushion.

Further, according to the present invention, since the lower pipe portion further includes the fourth portion and the fifth portion, air can flow smoothly within the duct.

1 is a diagram showing a vehicle seat as a vehicle seat according to an embodiment; FIG. 2 is a cross-sectional view of a vehicle seat. 3A and 3B are views showing a seat frame, a support member, and a pressure-receiving member. FIG. 3 is a top view of the seat cushion. FIG. 3 is a front view of the back frame and the pressure receiving member. It is a figure showing a duct. 1 is a bottom view of the cushion frame, the support member, the blower, and the duct. FIG. FIG. 3 is a rear view of the back frame, the pressure receiving member, and the duct. FIG. 3 is a rear view of the back frame to which the cover member is attached. 4 is a perspective view of the side frame cover as viewed from the inside in the left-right direction. FIG. FIG. 3 is a perspective view of the side frame cover viewed from the outside in the left-right direction. It is a figure showing the composition of a cushion pad. FIG. 3 is a top view of the cushion pad. It is a figure showing the composition of a back pad. FIG. 2 is a front view of the back pad. This is a cross-sectional view taken along the line XX in FIG. 15 . It is a figure which shows the modification of a side frame cover. It is a figure which shows the modification of a pressure receiving member and a duct.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In this specification, the terms front, back, left, right, top and bottom are based on the front, back, left, right, top and bottom as seen by a person sitting in the seat.
As shown in FIG. 1, the vehicle seat of this embodiment is configured as a vehicle seat S to be mounted in an automobile, and includes a seat cushion S1 and a seat back S2.

As shown in FIG. 2, the vehicle seat S is constructed by covering a seat frame F (see FIG. 3) that constitutes the frame of the seat with a pad P made of urethane foam or the like and upholstery U1, U2 made of fabric, leather or the like. Details will be described later, but the pad P has air passages A1, A2 formed therein and first air holes H1, H2 formed on the surface facing the occupant to communicate with the air passages A1, A2, and the vehicle seat S is configured to blow air blown from the blower 70 through the duct D and the air passages A1, A2 from the first air holes H1, H2 toward the occupant sitting in the seat.

As shown in FIG. 3, the seat frame F has a cushion frame F1 that constitutes the frame of the seat cushion S1, and a back frame F2 that constitutes the frame of the seat back S2. The back frame F2 is connected to the cushion frame F1 via a reclining mechanism RL. The reclining mechanism RL has a known configuration and supports the seat back S2 so that it can rotate relative to the seat cushion S1. In this embodiment, the upper side of the seat cushion S1 corresponds to the "occupant side" and the lower side corresponds to the "opposite side of the occupant side". In addition, the front side of the seat back S2 corresponds to the "occupant side" when not reclined by the reclining mechanism RL, and the rear side corresponds to the "opposite side of the occupant side".

The cushion frame F1 includes a pair of left and right cushion side frames 11, a pan frame 12 as a front frame, a rear pipe 13 as a rear frame, and a front pipe 14 (see FIG. 4) as a connecting pipe.
The pair of cushion side frames 11 are members that constitute the left and right frames of the seat cushion S1, and are arranged to face each other in the left-right direction and to be spaced apart from each other. The cushion side frame 11 is made of a sheet metal, and is formed into a long elongated shape from front to back.

The pan frame 12 is a plate-shaped member that connects the front parts of the pair of cushion side frames 11, and is made of sheet metal. The left and right ends of the pan frame 12 are connected to the front end of the cushion side frame 11 by welding.
As shown in FIG. 4, the rear pipe 13 and the front pipe 14 are made of metal pipe material, are spaced apart from each other in the front-rear direction, and are provided so as to connect the pair of cushion side frames 11. Specifically, the rear pipe 13 is arranged behind the pan frame 12 and spaced apart from the pan frame 12, and connects the rear portions of the pair of cushion side frames 11 to each other. Further, the front pipe 14 is arranged in front of the rear pipe 13 and spaced apart from the rear pipe 13, and connects the front portions of the pair of cushion side frames 11 to each other. The front pipe 14 is arranged below the pan frame 12.

A support member 30 is disposed between the pair of cushion side frames 11 of the cushion frame F1. The support member 30 is a member that receives the load from an occupant sitting in the seat, and includes a number of wire members 31 and a resin member 32.

The wire member 31 is made of a metal wire rod and is installed between the pan frame 12 and the rear pipe 13. The wire member 31 mainly includes a first extending portion 31A, a second extending portion 31B, and a rear hooking portion 31C as a hooking portion.
The first extending portion 31A extends in the front-rear direction while being bent alternately in the left-right direction. The front end of the first extending portion 31A is a front hook portion 31D that is hooked to a hook portion 12H formed on the pan frame 12. The front end portion of the first extending portion 31A including the front hook portion 31D is coated with resin, thereby suppressing the generation of sound due to contact between the wire member 31 (support member 30) and the pan frame 12. There is.
The second extending portion 31B extends obliquely rearward and upward from the rear end of the first extending portion 31A.
The rear hooking portion 31C is a portion that is hooked to the rear pipe 13, extends from the upper end of the second extending portion 31B, and is curved in a substantially arc shape.
The support member 30 includes four wire members 31, and the four wire members 31 are arranged in the left-right direction.

The resin member 32 is a member that connects the wire members 31. The resin member 32 is made of resin and is formed integrally with the wire member 31 by insert molding or the like so as to cover the entire circumference of a part of the wire member 31. The resin member 32 includes a first resin member 32A, a second resin member 32B, a third resin member 32C, a fourth resin member 32D, and a fifth resin member 32E.

The first resin member 32A connects the four wire members 31 near their central portions in the front-rear direction.
The second resin member 32B is disposed behind the first resin member 32A, and connects the two wire members 31 disposed at the center in the left-right direction near the central portions in the front-rear direction.
The third resin member 32C is arranged on both the left and right sides of the second resin member 32B, and is arranged on the left and right sides of the first extension part 31A of the wire member 31, which is arranged on the left and right sides, and on the left and right sides of the part. It connects the part that extends rearward from the end of the
The resin members 32A to 32C are formed with substantially rectangular through holes (numerals omitted) that extend vertically through the resin members 32A to 32C. The support member 30 is configured to be able to hold a member such as a wire harness by engaging a clip or the like for fastening the wire harness to the through hole.

The fourth resin member 32D is disposed behind the resin members 32B and 32C, and connects the rear ends of the first extending portions 31A of the four wire members 31 together.
The fifth resin member 32E connects the rear ends of the two adjacent wire members 31, specifically, the rear hook portions 31C. The fifth resin member 32E covers the rear hook portions 31C, thereby suppressing the generation of noise due to contact between the support member 30 and the rear pipe 13.

As shown in FIG. 5, the back frame F2 includes a pair of left and right sheet metal frames 22, a pipe frame 23, a lower frame 24 as a connecting frame, and a bridge frame 25.
The pair of sheet metal frames 22 are arranged so as to face each other in the left-right direction and to be spaced apart from each other. The sheet metal frame 22 is made of sheet metal and is formed into a vertically elongated shape.

The pipe frame 23 is made of a metal pipe material and includes a pair of left and right upper side frames 23A that extend substantially vertically, and an upper frame 23B that extends so as to connect the upper ends of the upper side frames 23A. The lower portions of the pair of upper side frames 23A are connected to the upper portion of the sheet metal frame 22 by welding, so that the pair of upper side frames 23A constitute the pair of back side frames 21 together with the pair of sheet metal frames 22. The pair of back side frames 21 constitute left and right frames of the seat back S2. In this embodiment, the "pair of side frames" includes a pair of back side frames 21 and a pair of cushion side frames 11 of the cushion frame F1.

The lower frame 24 is a member that connects the lower portions of the pair of backside frames 21, and is made of sheet metal. The left and right ends of the lower frame 24 are connected by welding to portions of the rear end of the sheet metal frame 22 constituting the backside frame 21 that extend inward from the left and right.
The bridge frame 25 is a member that connects the upper portions of the pair of backside frames 21, and is made of sheet metal. The left and right ends of the bridging frame 25 are connected to the upper part of the upper side frame 23A that constitutes the backside frame 21 by welding or the like. The bridging frame 25 has a lower extending portion 25A extending forward at the lower end, and vertically penetrating holes into which a wire member 60 to be described later is inserted are provided at the left and right ends of the lower extending portion 25A. A support hole 25B (see FIG. 3) is formed.

An S spring 40, a pressure receiving member 50, and a wire member 60 are arranged between the pair of back side frames 21 of the back frame F2.
The S spring 40 is formed by vertically bending a metal wire rod alternately. The S spring 40 is arranged above the lower frame 24 and is installed between the pair of backside frames 21. Specifically, the left and right ends of the S spring 40 are inserted from above into the spring engaging portions 22A provided at the bottom of the sheet metal frame 22, so that the S spring 40 is connected to the pair of back side frames 21 in a suspended state. ing.

The pressure-receiving member 50 is a plate-shaped member that receives the load from the occupant sitting on the seat, and is made of resin or the like. The pressure-receiving member 50 is arranged so as to face the back of the occupant. The lower end of the pressure-receiving member 50 is arranged in front of the S-spring 40. The pressure-receiving member 50 has an opening 50A that penetrates from front to back. The opening 50A is a hole for passing the duct D, and is formed in a substantially rectangular shape that is long in the left and right directions. The opening 50A is arranged in the center in the left and right direction of the lower part of the pressure-receiving member 50. More specifically, the opening 50A is arranged between a pair of extension parts 61 of the wire member 60, which will be described later. The opening 50A is arranged in a position that does not overlap with the S-spring 40 when viewed from the front side. Specifically, the opening 50A is arranged above the S-spring 40.

The wire member 60 is a member that connects the pressure receiving member 50 to the back frame F2, and mainly includes a pair of left and right extending portions 61, an inclined portion 62, an upper connecting portion 63, and a lower connecting portion 64. There is.
The extension portions 61 extend in the vertical direction (orthogonal direction perpendicular to the left-right direction) as a predetermined direction, and are arranged side by side in the left-right direction (direction perpendicular to the predetermined direction).
The inclined portion 62 extends from the upper end of the extending portion 61 toward the outer side in the left-right direction and diagonally upward.
The upper connecting part 63 extends upward from the upper end of the inclined part 62.
The lower connecting portion 64 connects the pair of left and right extending portions 61, the inclined portion 62, and the upper connecting portion 63. Specifically, the lower end portion of the lower connecting portion 64 extends in the left-right direction, and after extending upward from both left and right ends of the lower end portion, it is bent and extends inward in the left-right direction to connect the extension portion 61. connected to the bottom end.

The wire member 60 is connected to the back frame F2 by fastening the lower connecting portion 64 to the front side of the lower frame 24 and inserting the upper connecting portion 63 into a support hole 25B (see FIG. 3) formed in the lower extending portion 25A of the bridge frame 25. The pressure-receiving member 50 is disposed in front of a pair of extending portions 61 of the wire member 60, and is connected to the back frame F2 via the wire member 60 by fastening the extending portions 61 with cable ties or the like (not shown). The pair of extending portions 61 are disposed in positions overlapping the pressure-receiving member 50 when viewed from the front side.

As shown in FIG. 2, the vehicle seat S includes an air blower 70 and a duct D.
The blower 70 is, for example, a sirocco fan, and is disposed below the pan frame 12. Specifically, the blower 70 is attached to the pan frame 12 via a bracket 71.

The duct D is a member that connects the air passages A1, A2 formed in the pad P of the seat cushion S1 and the seat back S2 to the blower device 70, and extends from the underside of the seat cushion S1 through the rear side of the cushion frame F1 toward the seat back S2. As shown in FIG. 6, the duct D is configured to have a first duct D1 and a second duct D2 connected to the rear end of the first duct D1. The first duct D1 mainly has a lower pipe portion 110, a connection portion 120, and a first narrow portion 131, and the second duct D2 mainly has a second narrow portion 132, a bellows portion 140 as a flexible portion, a first flat portion 150, a second flat portion 160, and a back connection portion 170. In this embodiment, the first narrow portion 131 and the second narrow portion 132 correspond to the "narrow portion".

As shown in FIG. 7, the lower tube portion 110 is a portion disposed below the seat cushion S1, more specifically, below the support member 30, and extends substantially back and forth. The lower pipe part 110 includes a blower connection part 111 as a first part, a second part 112, a third part 113, a fourth part 114, a wide part 115 as a fifth part, and a branch pipe part. It has a cushion connection part 116 (see also FIG. 6).

The blower device connection portion 111 is a portion whose front end is connected to the blower device 70 and extends in the front-rear direction.
The second portion 112 extends obliquely rearward from the rear end of the blower device connection portion 111 outward in the left-right direction.
The third portion 113 extends rearward from the rear end of the second portion 112 .
In this embodiment, the second portion 112 has a left-right dimension (width) that gradually increases as it moves rearward from the rear end position of the blower device connection portion 111, and the third portion 113 has a left-right dimension that is larger than that of the blower device connection portion 111.

As shown in FIG. 6, the cushion connection part 116 is a part connected to the air passage A1 formed in the seat cushion S1, and extends from the front end of the third part 113 so as to protrude upward. The cushion connection part 116 has a bellows part (reference numeral omitted), and is flexible and can expand and contract vertically. As shown in FIG. 4, the duct D is connected to the cushion pad P1 by inserting the cushion connection part 116 through the U-shaped part of the wire member 31 arranged second from the right into the air passage A1 from the underside of the cushion pad P1 described later. Since the cushion connection part 116 extends from the third part 113 arranged in a position shifted to the right with respect to the blower device connection part 111 (see FIG. 7), in this embodiment, the cushion connection part 116 can be provided at a position that avoids the wire member 31 arranged in the seat cushion S1. This makes it possible to easily connect the air passage A1 formed in the seat cushion S1 to the duct D.

In addition, in this embodiment, the left-right dimension of the third portion 113 is larger than the left-right dimension of the blower device connection portion 111 (see FIG. 7), so the left-right dimension of the cushion connection portion 116 extending from the third portion 113 can be made larger. This ensures a sufficient flow path cross-sectional area for the cushion connection portion 116, allowing air to flow smoothly between the inside of the duct D and the air passage A1 formed in the seat cushion S1.

As shown in FIG. 7, the fourth portion 114 extends diagonally rearward from the rear end of the third portion 113 outward in the left-right direction.

The wide portion 115 extends rearward from the rear end of the fourth section 114. As shown in FIG. 6, the wide portion 115 has a dimension D11 in the left-right direction that is greater than its dimension D12 in the up-down direction. In other words, the wide portion 115 has a vertically flat cross-sectional shape. In this embodiment, not only the wide portion 115 but also the entire lower tube portion 110 has a vertically flat cross-sectional shape. The lower tube portion 110 including the wide portion 115, which is disposed below the seat cushion S1, has such a small vertical dimension that it can be made thinner in the vertical direction. This allows the vehicle seat S to be made more compact in the vertical direction.

Returning to FIG. 7, the wide portion 115 is located on the lower side of the support member 30, from the center position in the left-right direction of the pair of cushion side frames 11 (see the dashed line) to one of the cushion side frames 11, specifically , is located close to the right cushion side frame 11. In other words, the wide portion 115 is located closer to the right cushion side frame 11. When the support member 30 receives a load from the occupant, the center portion of the seat cushion S1 will bend more downward than the left and right end portions, but since the wide portion 115 is positioned closer to the right, Interference between the duct D and the support member 30 can be suppressed.

As shown in FIG. 2, in this embodiment, the fourth portion 114 and the wide portion 115 form the lower inclined portion 180. When viewed from the left-right direction, the lower inclined portion 180 extends at an incline so that it is positioned lower as it moves toward the rear. This makes it possible to suppress interference between the duct D and the support member 30 even if an occupant sits on the seat and the support member 30 is bent downward.

The first narrow portion 131 and the second narrow portion 132 are disposed at the rear of the cushion frame F1 and extend substantially vertically. The inner front-rear and left-right dimensions of the second narrow portion 132 are slightly larger than the outer front-rear and left-right dimensions of the first narrow portion 131, and the second narrow portion 132 is fitted to the upper end of the first narrow portion 131. This connects the first duct D1 and the second duct D2. As shown in FIG. 6, the first narrow portion 131 and the second narrow portion 132 have a left-right dimension D21 that is smaller than a dimension D22 in the approximately front-rear direction perpendicular to the left-right direction. In other words, the first narrow portion 131 and the second narrow portion 132 have a cross-sectional shape that is flattened horizontally. In this embodiment, not only the narrow portions 131 and 132 but also the bellows portion 140 have a cross-sectional shape that is flat horizontally.

The connection portion 120 is a portion that connects the first narrow portion 131 (narrow portion) and the wide portion 115. The connection portion 120 has a shape such that the dimension in the left-right direction gradually increases and the dimension in the up-down direction gradually decreases from the first narrow portion 131 toward the wide portion 115. This causes the cross-sectional shape of the duct D to gradually change from the first narrow portion 131 toward the wide portion 115, thereby improving the rigidity of the duct D compared to a case in which the cross-sectional shape does not change. In addition, the connection portion 120 can prevent the flow path cross-sectional area of the duct D from becoming smaller, so the flow rate of the air flowing through the duct D can be secured.

The bellows portion 140 extends substantially upward from the upper end of the second narrow portion 132. The bellows portion 140 has a shape in which peaks and valleys are alternately formed, and is flexible and expandable. As shown in FIG. 2, the bellows portion 140 is disposed behind the cushion frame F1, more specifically, behind the rear pipe 13. More specifically, the bellows portion 140 is located above the lower end 13A of the rear pipe 13. The upper end of the bellows portion 140 is disposed directly behind the lower frame 24, in other words, at a position overlapping the lower frame 24 when viewed from the rear.

In this embodiment, the first narrow portion 131, the second narrow portion 132, and the bellows portion 140 constitute a retraction portion 190. The retraction portion 190 extends in an inclined manner so as to be positioned forward as it goes downward. As shown in FIG. 8, the retraction portion 190 is arranged at a position inside the pair of cushion side frames 11 in the left-right direction. Thereby, the vehicle seat S can be made more compact in the left and right directions, compared to the case where the retracting portions 190 are arranged at positions on the left and right outer sides of the pair of cushion side frames 11. Further, the retraction portion 190 is arranged at a position closer to the right (one) cushion side frame 11 than the center position in the left-right direction of the pair of cushion side frames 11 (see the dashed line) at the rear of the cushion frame F1. There is. In other words, the retracting portion 190 is arranged at a position closer to the right cushion side frame 11.

Further, in the duct D, the retraction portion 190, which is a portion passing through the rear side of the rear pipe 13, is arranged at a different position in the left-right direction with respect to the rear hooking portion 31C of the wire member 31. Specifically, the retraction portion 190 is disposed on the right side of the rightmost rear hooking portion 31C. Furthermore, the ducts D are arranged at different positions in the left-right direction with respect to the second extending portion 31B of the wire member 31 when viewed from the rear side. Specifically, the retracting portion 190 and the wide portion 115 (see FIG. 7) are arranged on the right side of the second extending portion 31B located on the rightmost side when viewed from the rear side. Furthermore, in this embodiment, the retracting portion 190 and the wide portion 115 are arranged so as not to overlap the second extending portion 31B when viewed from any direction: front and back, left and right, and up and down. This makes it possible to suppress interference between the duct D and the wire member 31 even when the wire member 31 (support member 30) bends downward when the occupant sits on the seat.

The first flat portion 150 extends obliquely upward from the upper end of the retraction portion 190 (the bellows portion 140) toward the center in the left-right direction of the pair of back side frames 21. The first flat portion 150 is disposed on the rear side of the lower frame 24. As shown in FIG. 6, the dimension D41 of the first flat portion 150 in the front-rear direction (the direction facing the lower frame 24) is smaller than the dimension D42 in the approximately up-down direction perpendicular to the front-rear direction. In other words, the first flat portion 150 has a cross-sectional shape that is flat in the front-rear direction. This allows the first flat portion 150 to be made thinner in the front-rear direction, so that the vehicle seat S can be made compact in the front-rear direction. In addition, since a gap can be secured between the first flat portion 150 and the lower frame 24 while achieving compactness, interference between the duct D and the lower frame 24 can be suppressed.

Returning to FIG. 8, the second flat portion 160 extends upward from the upper end of the first flat portion 150. The second flat portion 160 is arranged at the center of the pair of backside frames 21 in the left-right direction and on the rear side of the S spring 40. In this embodiment, the second flat part 160 and the first flat part 150 have substantially the same dimension in the front-rear direction. The second flat portion 160 has a dimension D41 (see FIG. 6) in the front-rear direction (opposing direction facing the S spring 40) that is smaller than a dimension D43 in the left-right direction orthogonal to the front-rear direction. In other words, the second flat portion 160 has a flat cross-sectional shape from front to back. Thereby, the second flat portion 160 can be made thinner in the front-rear direction, so the vehicle seat S can be made more compact in the front-rear direction. Moreover, since a gap can be secured between the second flat part 160 and the S spring 40 while achieving compactness, interference between the duct D and the S spring 40 can be suppressed.

As shown in FIG. 2, the back connecting portion 170 is a portion connected to the air passage A2 formed in the seat back S2, and extends obliquely upward and forward from the upper end of the second flat portion 160. The duct D is connected to the back pad P2 by inserting the back connecting portion 170 into the air passage A2 from the rear side of the back pad P2, which will be described later, through an opening 50A formed in the pressure receiving member 50.

As shown in FIG. 4, a well-known weight sensor WS is disposed as a sensor on the underside of one of the pair of cushion side frames 11, specifically the left cushion side frame 11. In this embodiment, the duct D is disposed in a position in the left-right direction closer to the right cushion side frame 11, which is the other of the pair of cushion side frames 11, than to the left cushion side frame 11, which is one of the pair of cushion side frames 11. In other words, the duct D is disposed in a position in the left-right direction closer to the cushion side frame 11 where the weight sensor WS is not disposed. This makes it possible to suppress interference between the duct D and the weight sensor WS and the electric wires (not shown) extending from the weight sensor WS.

The resin member 32 constituting the support member 30 is arranged so as to overlap the duct D when viewed from above. More specifically, the first resin member 32A is arranged above the third part 113 so that the right part overlaps the third part 113 of the duct D when viewed from above. The right third resin member 32C is arranged above the wide part 115 of the duct D so as to overlap the wide part 115 when viewed from above. The fourth resin member 32D is arranged above the wide part 115 so that the right end part overlaps the wide part 115 when viewed from above. As a result, even if the support member 30 bends downward when an occupant sits on the seat and interferes with the duct D, the resin members 32A, 32C, and 32D will first come into contact with the duct D, so that the effects of contact between the duct D and the support member 30, such as the generation of noise and the impact at the time of contact, can be reduced.

Further, as shown in FIG. 7, in the present embodiment, the second portion 112 of the lower tube portion 110 extends diagonally rearward to the right and approaches the right cushion side frame 11, and the third portion 113 extends rearward substantially straight. After being extended, the fourth portion 114 extends obliquely to the right and rearward to further approach the right cushion side frame 11, so the duct D can be arranged so as to gradually approach the right cushion side frame 11. Can be done. Thereby, rapid changes in the flow path within the duct D can be suppressed, so that air can flow smoothly within the duct D.

As shown in FIG. 9, a cover member 80 is arranged on the back frame F2. The cover member 80 is a member that covers the back connecting portion 170, which is the portion where the duct D connects to the air passage A2 of the seat back S2, from the rear side. The cover member 80 is formed from resin or the like into a plate shape that is long from side to side. The cover member 80 has left and right end portions fixed to portions extending inward from the left and right of the rear ends of the pair of backside frames 21 by fastening bolts or the like. By providing such a cover member 80, the portion where the duct D and the pad P (back pad P2) of the seat back S2 are connected can be protected by the cover member 80.

10 and 11 , the vehicle seat S further includes a side frame cover 90. The side frame cover 90 is a member that covers the rear end portion of the right cushion side frame 11. The side frame cover 90 is made of resin, and has a side frame cover portion 91, a duct cover portion 92, and a reclining mechanism cover portion 93.
The side frame cover portion 91 is a portion that covers the inside in the left-right direction of the rear end portion of the right cushion side frame 11. The side frame cover portion 91 is disposed so as to extend across the front side, lower side, and rear side of the lower end portion of the back side frame 21.

The duct cover portion 92 is a portion that covers the retraction portion 190, which is a part of the duct D, at the rear of the cushion frame F1. Specifically, the duct cover portion 92 is disposed behind the rear pipe 13 and covers the first narrow portion 131, the second narrow portion 132, and the bellows portion 140. The duct cover section 92 includes a first side cover section 92A extending rearward from the rear end of the side frame cover section 91 to a position behind the retraction section 190, and a first side cover section 92A extending rearward from the rear end of the first side cover section 92A inward in the left-right direction. It has a rear cover part 92B that extends toward the rear cover part 92B and covers the retraction part 190 from behind. The rear cover portion 92B has an arcuate cross-sectional shape that is convex diagonally downward at the rear, and extends downward along the retraction portion 190 so as to be located at the front.

The reclining mechanism cover part 93 is a part that covers the reclining mechanism RL, and is formed into a substantially cup shape with an open inner side and lower side in the left-right direction. The reclining mechanism cover part 93 is formed to extend from the side frame cover part 91 along the circumferential surface of the reclining mechanism RL, and includes a circumferential cover part 93A that covers the rear side, upper side, and front side of the reclining mechanism RL, and It mainly includes a second side cover part 93B that covers the outer side of the RL in the left-right direction.

The side frame cover part 91, the duct cover part 92, and the reclining mechanism cover part 93 may be integrally formed as one part, or may be partially formed as separate parts. As an example, the duct cover part 92 is formed integrally with the side frame cover part 91, and the reclining mechanism cover part 93 is formed separately, and the duct cover part 92 is formed at the rear end of the side frame cover part 91. The reclining mechanism cover section 93 can be attached to the side frame cover section 91 by engaging the claws provided on the reclining mechanism cover section 93 into the provided holes.

By providing the duct cover portion 92 and the side frame cover portion 91 as an integral part, it is no longer necessary to provide a cover for the cushion side frame 11 and a cover for the duct D separately, so the number of parts in the vehicle seat S can be reduced. Furthermore, when the side frame cover portion 91, the duct cover portion 92, and the reclining mechanism cover portion 93 are provided as an integral part, the side frame cover 90 can be given the function of protecting not only the duct D, but also the reclining mechanism RL, making it possible to further reduce the number of parts in the vehicle seat S.

As shown in FIG. 2, the pad P includes a cushion pad P1 that constitutes the pad of the seat cushion S1, and a back pad P2 that constitutes the pad of the seat back S2.
As shown in FIG. 1, the cushion pad P1 has a central portion P11 and a pair of left and right side portions P12 provided on both left and right sides of the central portion P11 and projecting above the central portion P11. The pad P2 has a central portion P21 and a pair of left and right side portions P22 provided on both left and right sides of the central portion P21 and projecting forward from the central portion P21.

As shown in FIG. 12, the cushion pad P1 is configured to include a first member 210 in which a groove 211 that constitutes the ventilation path A1 is formed, and a plate-shaped second member 220 in which a first ventilation hole H1 is formed to penetrate vertically. The first member 210 also includes a first member main body 230 and a plate-shaped groove forming member 240 in which the groove 211 is provided vertically. The groove forming member 240 is disposed so as to overlap the upper surface of the first member main body 230, and the second member 220 is disposed so as to overlap the upper surface of the groove forming member 240 (first member 210).

The first member main body 230 has a main body central portion 231 that constitutes a central portion P11 together with the groove forming member 240 and the second member 220, and a pair of side portions P12 are formed on both left and right sides of the main body central portion 231. The main body central portion 231 has a recess 232 in the front portion thereof, in which the groove forming member 240 and the second member 220 are arranged to overlap. A second ventilation hole 250 penetrating vertically is formed at the rear end of the bottom surface of the recess 232 . The second ventilation hole 250 communicates with the ventilation path A1 from the lower surface of the first member main body 230 (cushion pad P1). The duct D is connected to the cushion pad P1 by inserting the cushion connecting portion 116 (see FIG. 6) into the second ventilation hole 250 from below. As shown in FIG. 13, the second ventilation hole 250 is arranged at a position shifted to the right from the center in the left-right direction (see the dashed line) of the cushion pad P1.

The groove forming member 240 has a groove 211 that penetrates vertically and forms the ventilation path A1. The ventilation path A1 of the cushion pad P1 is formed by arranging the groove forming member 240 and the second member 220 in this order on top of the recess 232 of the first member body 230, and blocking the top and bottom of the groove 211 with the second member 220 and the first member body 230. When viewed from above, the ventilation path A1 includes a first ventilation path 261, a second ventilation path 262, a third ventilation path 263, a fourth ventilation path 264, and a fifth ventilation path 265.

The first air passage 261 extends in a direction intersecting the left-right direction, specifically, in the approximately front-rear direction. One end, i.e., the rear end, of the first air passage 261 is in communication with the blower 70 via the fourth air passage 264, the fifth air passage 265, the second ventilation hole 250, and the duct D.
The second air passage 262 extends from the front end, which is the other end of the first air passage 261, in a direction different from the direction in which the first air passage 261 extends, specifically, toward the inside in the left-right direction.
The third air passage 263 extends in a direction intersecting the left-right direction from the inner left-right end, which is the end of the second air passage 262 opposite the first air passage 261, specifically, toward the rear end side of the first air passage 261, approximately parallel to the first air passage 261.

In this embodiment, two substantially U-shaped flow paths consisting of the first air passage 261, the second air passage 262, and the third air passage 263 are formed symmetrically with respect to the center of the cushion pad P1 in the left-right direction. This allows the occupant to be supported in a balanced manner in the part of the cushion pad P1 where the air passage A1 is not formed, so that even in a configuration in which the air passage A1 includes the first air passage 261, the second air passage 262, and the third air passage 263, the seating feeling when sitting in the seat can be improved.

The fourth air passage 264 is a flow passage that connects the rear ends of the left and right first air passages 261, and extends substantially left and right.
The fifth ventilation path 265 is a flow path that connects the second ventilation hole 250 and the fourth ventilation path 264, and extends approximately back and forth. Specifically, the fifth ventilation passage 265 extends obliquely forward toward the left-right center of the cushion pad P1 from the second ventilation hole 250, which is located at a position shifted to the right from the left-right center of the cushion pad P1. It is connected to the center portion of the fourth air passage 264 in the left-right direction.
The groove forming member 240 is fixed to the first member main body 230 with an adhesive or the like.

The second member 220 has a plurality of first ventilation holes H1 that communicate with the ventilation passage A1. The first ventilation holes H1 of the cushion pad P1 include a first hole 271, a second hole 272, a third hole 273, and a fourth hole 274.

The first holes 271 are holes that communicate with the first air passage 261, and are formed in plural along the first air passage 261 that extends substantially back and forth. Specifically, the first hole 271 is arranged along the left-right direction outer side of the two first holes 271A arranged substantially front and back along the first ventilation path 261, and the first hole 271A located behind the first hole 271A. one first hole 271B.
The second holes 272 are holes that communicate with the third ventilation path 263, and are formed in plural along the third ventilation path 263 that extends substantially back and forth. Specifically, the second hole 272 consists of two holes arranged substantially one behind the other along the third ventilation path 263.
The row of first holes 271A and the row of second holes 272, which are arranged in front and behind each other, are arranged side by side in the direction in which the second ventilation passage 262 extends, specifically, in the left-right direction.

The third hole 273 is a hole that communicates with the rear end of the first air passage 261 , and the fourth hole 274 is a hole that communicates with the left and right ends of the fourth air passage 264 .
The second member 220 is fixed to the groove forming member 240 and the first member main body 230 (first member 210) by adhesive or the like.

As shown in FIG. 4, the front pipe 14 is arranged below the cushion pad P1 with the cushion pad P1 covering the cushion frame F1. In this state, the front pipe 14 is arranged at a different position from the first ventilation passage 261, the second ventilation passage 262, and the third ventilation passage 263 when viewed from above. Specifically, the front pipe 14 is arranged behind the first ventilation path 261, the second ventilation path 262, and the third ventilation path 263 when viewed from above.

In addition, when the cushion pad P1 covers the cushion frame F1, the pan frame 12 is disposed below the front end of the cushion pad P1 and supports the cushion pad P1 from below. In this state, the pan frame 12 is disposed so as to overlap the first air passage 261, the second air passage 262, and the third air passage 263 when viewed from above. In other words, the pan frame 12 is disposed below the portion in which the first air passage 261, the second air passage 262, and the third air passage 263 are formed. In this embodiment, the pan frame 12 corresponds to the "pad support member". The portion of the cushion pad P1 in which the air passages 261 to 265 are formed is more easily deformed than the portion in which the air passages 261 to 265 are not formed, but in this embodiment, the portion in which the air passages 261 to 263 are formed can be supported by the pan frame 12, so that excessive deformation of the cushion pad P1 can be suppressed. In particular, in this embodiment, the easily deformed portion of the cushion pad P1 where the air passages 261-263 are formed can be supported by the surface of the plate-shaped pan frame 12, further suppressing excessive deformation of the cushion pad P1.

As shown in FIG. 14, the back pad P2 includes a first member 310 in which a groove 311 constituting the ventilation path A2 is formed, and a plate-shaped second member 310 formed so that the first ventilation hole H2 penetrates in the front and back. It is configured to include a member 320 and a third member 330. The second member 320 and the third member 330 are arranged to overlap the front surface of the first member 310. In this embodiment, the back pad P2 corresponds to "a pad member that covers the passenger side of the pressure receiving member".

The first member 310 has a bottomed groove 311 that is recessed toward the rear, and a second ventilation hole 350 that penetrates from the front to the rear.
In the air passage A2 of the back pad P2, a second member 320 and a third member 330 are arranged in front of the first member 310 to overlap each other, and the front side of the groove 311 is closed by the second member 320 and the third member 330. It is formed by The ventilation passage A2 includes a first passage 361, a pair of second passages 362, a pair of third passages 363 as a pair of third ventilation passages, a pair of fourth passages 364 as a fourth ventilation passage, and two It includes a fifth passage 365, a sixth passage 366, a seventh passage 367, and a pair of branch passages 368 as a first ventilation passage.

The first passage 361, the second passage 362, the third passage 363, the fourth passage 364, and the fifth passage 365 are formed near the vertical center of the central portion P21.
The first path 361 extends in the left-right direction. The second ventilation hole 350 communicates from the rear surface of the first member 310 (back pad P2) to a first passage 361 that constitutes the ventilation passage A2. The duct D is connected to the back pad P2 by inserting the back connecting portion 170 (see FIG. 6) into the second ventilation hole 350 from the rear side.

The second paths 362 extend obliquely upward from the left and right ends of the first path 361 outward in the left-right direction.
The third path 363 extends in a vertical direction (a direction perpendicular to the left-right direction), specifically, upward, from an upper end of the second path 362. The pair of third paths 363 are arranged side by side in the left-right direction.
The fourth paths 364 extend obliquely upward from the upper ends of the third paths 363 inwardly in the left-right direction, and the upper ends of the fourth paths 364 are connected to each other. In other words, the pair of fourth paths 364 connect the upper ends of the pair of third paths 363 to each other.

The fifth path 365 is disposed at a position inside the pair of third paths 363 in the left-right direction, and extends in the left-right direction to connect the pair of third paths 363. The two fifth paths 365 are disposed side by side in the up-down direction. The first path 361, the second path 362, the third path 363, and the fourth path 364 have approximately the same dimension (depth) in the front-to-back direction of the groove, but the fifth path 365 has a smaller (shallower) dimension in the front-to-back direction than these.

The sixth passage 366 and the seventh passage 367 are formed in the upper portion of the central portion P21.
The seventh path 367 extends in the left-right direction.
The sixth passage 366 is a flow passage that connects the upper ends of the pair of fourth passages 364 and the center portion in the left-right direction of the seventh passage 367, and extends substantially vertically.

The branch path 368 extends from near the vertical center of the third path 363 toward the left-right outer side along the front surface of the back pad P2. In detail, as shown in FIG. 15, the branch path 368 extends obliquely from near the vertical center of the third path 363 toward the left-right outer side of the back pad P2 so as to be located on the upper side (the other side in the perpendicular direction). In other words, the branch path 368 extends from near the vertical center of the third path 363 toward the left-right outer side obliquely upward. In this embodiment, the part of the third path 363 that extends downward (one side in the perpendicular direction) from the position where it connects to the branch path 368, the second path 362, and the first path 361 correspond to the "second ventilation path" that connects the branch path 368 and the second ventilation hole 350.

The second member 320 and the third member 330 have a plurality of first ventilation holes H2 (see FIG. 14) that communicate with the ventilation path A2. The first ventilation hole H2 of the back pad P2 is connected to a first hole 371, a second hole 372, a third hole 373, a fourth hole 374, and a fifth hole 375 formed in the second member 320, and to the third member 330. and a sixth hole 376 formed therein.

The first hole 371 is a hole that communicates with the vicinity of the lower end of the third passage 363.
The second hole 372 is a hole that communicates with the vicinity of the vertical center of the third path 363, in other words, the position where the branch path 368 of the third path 363 connects.
The third hole 373 is a hole that communicates with the vicinity of the lower end of the fourth passage 364.
The fourth holes 374 are holes communicating with the fifth passages 365, and six in total are formed, one each at opposing positions near the center and both ends in the left-right direction of each fifth passage 365.
The fifth hole 375 is a hole that communicates with the branch path 368. The fifth hole 375 is arranged at the end of the center portion P21 in the left-right direction, specifically, at the left and right ends of the second member 320.
The sixth hole 376 is a hole that communicates with the seventh passage 367, and is formed one each at positions facing the left and right ends of the seventh passage 367.

The back pad P2 has a generally U-shaped hanging groove 380 on both the left and right sides and on the upper side (one side in the direction perpendicular to the left and right direction) of the second member 320 as a ventilation hole forming portion. A hanging wire (not shown) for hanging the upholstery U2 (see FIG. 16) in the hanging groove 380 is embedded in the back pad P2 by insert molding so as to run along the hanging groove 380, and the hanging wire is partially exposed from a plurality of holes 381 formed in the bottom of the hanging groove 380. The upholstery U2 of the seat back S2 is attached to the back pad P2 by engaging a hook or the like provided on the upholstery U2 with the part exposed from the hole 381 of the hanging wire.

As shown in FIG. 16, the branch path 368 has one end, which is an outer end in the left-right direction, closed by the skin U2 by hanging the skin U2 in the hanging groove 380. The branch path 368 has an opposing surface 368A facing the fifth hole 375. The opposing surface 368A is disposed at an end of the branch path 368 on the outer side in the left-right direction. More specifically, the opposing surface 368A is disposed at a position on the outer side in the left-right direction from the center position of the branch path 368 in the left-right direction. The opposing surface 368A is inclined so as to approach the front side as it approaches the edge of the back pad P2 as viewed from the front side, specifically, the outer edge in the left-right direction. The opposing surface 368A is formed on the first member 310.
The second member 320 and the third member 330 (see FIG. 14) are fixed to the first member 310 by adhesive or the like.

Returning to FIG. 15, the ventilation passage A2 is arranged to intersect with the wire member 60 when viewed from the front side. Specifically, the second passage 362 and the fourth passage 364 extending diagonally are arranged to intersect with the extension portion 61 of the wire member 60 when viewed from the front side. Also, the fifth passage 365 is arranged so that the left and right ends intersect with the extension portion 61. On the other hand, the first passage 361 and the third passage 363 are arranged at positions different from the extension portion 61 when viewed from the front side. Specifically, the first passage 361 is arranged at a position on the inner side in the left-right direction of the extension portion 61, and the third passage 363 is arranged at a position on the outer side in the left-right direction of the extension portion 61. Also, the sixth passage 366 is arranged at a position on the inner side in the left-right direction of the lower end of the inclined portion 62 and the upper connecting portion 63 of the wire member 60, and the seventh passage 367 is arranged at a position on the inner side in the left-right direction of the upper end of the upper connecting portion 63.

The cushion pad P1 and the back pad P2 are configured to include the first members 210, 310 in which the ventilation paths A1, A2 are formed, and the second members 220, 320 in which the first ventilation holes H1, H2 are formed. Therefore, the pad P can be formed more easily than when the pads having the ventilation paths A1, A2 and the first ventilation holes H1, H2 are integrally formed. Furthermore, the cushion pad P1 having the ventilation path A1 including the ventilation paths 261-263 and the back pad P2 having the ventilation path A2 in which the inclined opposing surface 368A is formed can be easily formed. In addition, for the cushion pad P1, the first member 210 is configured from the first member main body 230 and the groove forming member 240, so that the first member 210 having the ventilation path A1 of a complex shape including the ventilation paths 261-263 can be easily formed. This makes it easier to form the cushion pad P1.

According to the present embodiment described above, as shown in FIG. 2, the duct D (retreat portion 190) can be protected by the duct cover portion 92 of the side frame cover 90 at the rear portion of the seat cushion S1. It is possible to prevent the feet of the occupant in the seat from hitting the duct D.

Further, since the duct cover portion 92 covers the bellows portion 140, it is possible to prevent the feet of the rear seat occupant from hitting the bellows portion 140, which is a soft portion of the duct D.

In addition, because the bellows portion 140 is located above the lower end 13A of the rear pipe 13, the feet of rear seat passengers are more effectively prevented from hitting the bellows portion 140 of the duct D compared to when the bellows portion is located below the lower end 13A of the rear pipe 13.

Further, since the narrow width portions 131 and 132 have a small dimension (width) in the left and right direction, it is possible to prevent the feet of the rear seat occupant from hitting the narrow width portions 131 and 132 of the duct D. In addition, the narrow width portions 131 and 132 have a shape that is strong against loads from approximately the front and back directions, with small left and right dimensions and large front and rear dimensions. 131, 132, deformation of the duct D can be suppressed.

Further, according to the present embodiment, in the rear part of the seat cushion S1, the retraction part 190 of the duct D is arranged close to the right cushion side frame 11, as shown in FIG. This can prevent the occupant's feet from hitting the duct D.

In addition, because the retraction portion 190 extends at an angle so that it is positioned forward as it approaches downward, the retraction portion 190 of the duct D is positioned at the rear of the seat cushion S1 so as to be away from the feet of the rear seat passenger. This further prevents the feet of the rear seat passenger from hitting the duct D.

Further, according to the present embodiment, the back connecting portion 170 of the duct D can be connected to the ventilation path A2 formed in the back pad P2 through the opening 50A of the pressure receiving member 50, so that the vehicle seat S can be Even in the configuration including the pressure receiving member 50, the air passage A2 of the back pad P2 and the duct D can be easily connected.

In addition, because the opening 50A is positioned so as not to overlap the S-spring 40 when viewed from the rear, the back connection portion 170 of the duct D can be easily passed through the opening 50A of the pressure-receiving member 50. This makes it easier to connect the air passage A2 of the back pad P2 to the duct D.

Further, according to the present embodiment, as shown in FIG. 13, the first ventilation hole H1 of the cushion pad P1 communicates with the first hole 271 that communicates with the first ventilation path 261 and the third ventilation path 263. Since the second hole 272 is included, air can pass through a wide range of the sheet surface. On the other hand, since the first ventilation path 261, the second ventilation path 262, and the third ventilation path 263 can be formed as continuous flow paths, the number of flow paths communicating with the blower device 70 can be reduced. As a result, it is possible to suppress the weakening of the air flow within the ventilation path A1, and thus the air can flow satisfactorily within the cushion pad P1.

Furthermore, since the row of first holes 271A and the row of second holes 272 are arranged side by side in the left-right direction, air can pass through a wider range of the seat surface, and the plurality of first ventilation holes H1 can be It can be arranged efficiently.

In addition, since the fifth air passage 265 extends diagonally forward from the second ventilation hole 250 toward the center in the left-right direction and connects to the fourth ventilation passage 264, there is no sharp bend in the fifth ventilation passage 265 connecting the second ventilation hole 250 and the fourth ventilation passage 264. This allows air to flow smoothly from the second ventilation hole 250 through the fifth ventilation passage 265 to the fourth ventilation passage 264, and further through the first ventilation passage 261, the second ventilation passage 262, and the third ventilation passage 263 to the first ventilation hole H1.

Further, according to the present embodiment, as shown in FIG. 16, the opposing surface 368A of the branch path 368 of the back pad P2 is inclined so as to approach the front side as it approaches the outer edge in the left-right direction. Air passing through the holes 375 can flow along the slope of the opposing surface 368A. This allows air to flow well.

In addition, since the opposing surface 368A is arranged at the outer end in the left-right direction of the branching path 368, the opposing surface is more suitable for air flow than in the case where the opposing surface is arranged in the middle of the long branching path 368. The slope of 368A can be effectively utilized. This allows air to flow better.

In addition, since the fifth hole 375 is located at the end of the central portion P21 in the left-right direction, when air (see dashed line) is blown out from the fifth hole 375, the air that flows vigorously along the slope of the opposing surface 368A can be blown out from the fifth hole 375 so as to graze the body of the occupant. This increases the feeling of coolness.

Further, since the branch passage 368 extends diagonally upward on the outside in the left-right direction so as to move away from the second ventilation hole 350, the air flowing in from the second ventilation hole 350 is passed through the first passage 361 and the second passage 362 to the third passage. The water can flow from the path 363 to the branch path 368 in a good manner.

Although one embodiment of the invention has been described above, the present invention is not limited to the above embodiment. The specific configuration can be appropriately changed as described below without departing from the spirit of the invention. In the following, the same reference numerals are used to designate the same configuration as the above embodiment, and the description is omitted as appropriate, and differences from the above embodiment are described in detail.
17, the side frame cover 90 may be configured such that the duct cover portion 92 has a rib-like convex portion 95 that protrudes from the inner surface toward the duct D, and the convex portion 95 enters and engages with a valley portion of the bellows portion 140. According to this, the position of the duct D can be regulated by the engagement between the duct D and the convex portion 95 of the duct cover portion 92, so that the movement of the duct D can be suppressed.

Further, as shown in FIG. 17, the opening 50A of the pressure receiving member 50 may be provided so that the duct D can be held at the edge of the opening. According to such a configuration, since the duct D can be held by the pressure receiving member 50, there is no need to separately provide a member for holding the duct D, and the number of parts of the vehicle seat S can be reduced. Further, as shown in FIG. 8, when the duct D is held by the pressure receiving member 50 in a configuration in which the opening 50A is arranged between the pair of extension portions 61 of the wire member 60, the pressure receiving member 50 Since the duct D can be held in the highly rigid portion between the pair of extension parts 61, the duct D can be firmly held by the pressure receiving member 50.

In the above embodiment, the opening 50A of the pressure-receiving member 50 is disposed between the pair of extensions 61, but this is not limited thereto. For example, the opening may be disposed outside the extensions 61 in the left-right direction (the direction perpendicular to the predetermined direction). As an example, as shown in FIG. 18, the opening 50B for passing the duct D is disposed at a position on the left-right outer side of the extensions 61, specifically, at a position on the right side of the right extension 61. The left-right outer portion of the pair of extensions 61 of the pressure-receiving member 50 is more flexible than the portion between the pair of extensions 61, so by disposing the opening 50B in the flexible portion, the duct D can be easily connected to the opening 50B. The opening 50B may be disposed on the left side of the left extension 61.

Further, in the embodiment, the pressure receiving member 50 is connected to the back frame F2 using one wire member 60, but the present invention is not limited to this, and the pressure receiving member 50 may be connected to the back frame F2 using two wire members. good. Further, in the embodiment, one wire member 60 has a pair of extension parts 61, but when connecting the pressure receiving member 50 to the back frame F2 with two wire members, each wire member It is good also as a structure which has one extension part each.

Further, in the embodiment, the pressure receiving member 50 does not operate, but this is not a limitation. The configuration may be such that the state of support for the occupant's lumbar region can be changed by changing the shape of the portion that corresponds to the lumbar region of the vehicle. In this case, a pressure receiving member driving device such as an actuator for moving the pressure receiving member 50 is attached to one of the pair of backside frames 21, specifically, the left backside frame 21, as explained with reference to FIG. It is desirable that the The duct D is located closer to the right (other) back side frame 21 of the pair of back side frames 21 than the left (one) back side frame 21 in the left-right direction. , interference with the pressure-receiving member drive device, electric wires extending from the pressure-receiver drive device, etc. can be suppressed. Further, it is desirable that the pressure receiving member driving device be disposed inside the pair of side frames in the left-right direction. Thereby, the vehicle seat can be made more compact laterally.

In addition, when the pressure-receiving member drive device is disposed on the right back side frame 21 or the cushion side frame 11 and overlaps with the duct D in the left-right direction, it is preferable that the pressure-receiving member drive device is disposed in a position different from that of the duct D in the front-rear direction or the up-down direction. For example, it is preferable to dispose the pressure-receiving member drive device in front and behind the duct D. This can suppress interference between the duct D and the pressure-receiving member drive device. In addition, by disposing the duct on the seat cushion below the pressure-receiving member drive device and disposing the duct on the seat back behind the pressure-receiving member drive device, it is possible to suppress interference between the duct and the pad. In addition, when the pressure-receiving member 50 moves forward and backward, it is preferable to provide a bellows portion 171 that expands and contracts forward and backward at the rear end of the back connection portion 170 as shown in FIG. 17. This can suppress the duct D from coming off the back pad P2 when the pressure-receiving member 50 moves. In addition, the pressure-receiving member drive device is not limited to an actuator, and may be, for example, a control unit that controls an actuator.

Further, in the embodiment, the side frame cover 90 has a configuration that covers the rear end portion that is a part of the cushion side frame 11, but is not limited to this. For example, the side frame cover 90 can have a configuration that covers the entire cushion side frame 11. There may be. Further, for example, the duct cover portion 92 may be configured to cover only a portion of the bellows portion 140 as a flexible portion, or may be configured to cover the entirety.

In the above embodiment, as shown in FIG. 4, the pan frame 12 as the pad support member is arranged so as to overlap the entire air passages 261 to 263, but this is not limited to this. For example, referring to FIG. 4, the pan frame 12 may be arranged so as to overlap the entire second air passage 262 and the front portions of the first air passage 261 and the third air passage 263 when viewed from above. In other words, the pad support member may be arranged so as to overlap at least a portion of the first air passage, the second air passage, and the third air passage. In addition, the pad support member is not limited to a plate-shaped member such as the pan frame 12, and may be, for example, a member made of a pipe material.

In the above embodiment, the cushion pad P1 has a plurality of first holes 271 and a plurality of second holes 272 as the first ventilation hole H1, but this is not limited thereto. For example, a plurality of first holes and only one second hole may be formed, or vice versa. In other words, at least one first hole and one second hole may be formed. In the above embodiment, the second ventilation hole 250 of the cushion pad P1 is disposed at a position shifted to the right from the center in the left-right direction, but this is not limited thereto. For example, it may be disposed at a position shifted to the left from the center in the left-right direction of the cushion pad P1, or it may be disposed at the center in the left-right direction. In the above embodiment, two flow paths consisting of the ventilation paths 261 to 263 are formed, but this is not limited thereto. There may be three or more, or there may be only one.

In the above embodiment, one end of the branch passage 368 (first air passage) is closed, but this is not limited thereto and may be an open configuration. In addition, multiple fifth holes 375 (first air passages) communicating with the first air passage may be provided for each first air passage.

Further, in the embodiment, the cushion pad P1 and the back pad P2 are configured to include a plurality of members, but the invention is not limited to this, and for example, each pad may be configured from one member.

In addition, in the above embodiment, the duct D has a bellows portion 140 as a flexible portion, but this is not limited thereto, and the flexible portion may have any configuration as long as it has flexibility.

Further, in the embodiment, the support member includes a plurality of wire members 31 and a resin member 32 connecting the wire members 31, but the support member is not limited to this. For example, the support member may have a configuration in which substantially the entirety of a plurality of wire members are covered with a resin member (resin) and connected. Moreover, the support member may be configured to consist only of a wire-shaped member such as an S spring.

Further, in the embodiment, a sirocco fan is illustrated as the blower device 70, but the blower device 70 is not limited to this, and may be, for example, a propeller fan or a turbo fan. Further, in the embodiment, the vehicle seat S is configured to blow out air from the first ventilation holes H1 and H2, but is not limited to this. For example, the vehicle seat S is configured to suck air from the first ventilation holes. may have been done. Further, the blower may be capable of switching between blowing air and suction, for example, by changing the rotation direction of the impeller. Furthermore, in the embodiment described above, the vehicle seat S includes the blower device 70, but the vehicle seat itself may be configured without the blower device. In other words, the blower device may be provided in the body of the automobile on which the vehicle seat is mounted. In this case, the vehicle seat may be configured such that the duct is connected to, for example, an air outlet or suction port provided in the vehicle body.

Further, in the embodiment, the weight sensor WS that detects the weight of the seat is exemplified as a sensor disposed below the cushion side frame 11, but the sensor is not limited to this, and for example, the sensor that detects the front and rear positions of the seat is It may also be a position sensor or the like.

In addition, a configuration similar to the frame and pads of the seat cushion S1 described in the above embodiment may be applied to the seat back, and a configuration similar to the frame and pads of the seat back S2 may be applied to the seat cushion. In addition, in the above embodiment, the air passage is formed in both the seat cushion and the seat back, but this is not limited to this, and the air passage may be formed in only one of the seat cushion and the seat back.

In the above embodiment, a vehicle seat S installed in an automobile is given as an example of a vehicle seat, but the vehicle seat is not limited to this and may be a seat installed in a vehicle other than an automobile, such as a railroad car, ship, or aircraft.

Furthermore, the elements described in the above embodiments and variations may be implemented in any combination.

11 Cushion side frame 30 Support member 31 Wire member 32 Resin member 70 Air blower 110 Lower tube portion 111 Air blower connection portion 112 Second portion 113 Third portion 114 Fourth portion 115 Wide portion 116 Cushion connection portion 120 Connection portion 131 No. 1 narrow part 132 2nd narrow part 180 Lower inclined part 190 Retraction part A1, A2 Air passage D duct S Vehicle seat S1 Seat cushion S2 Seat back

Claims (1)

A vehicle seat comprising a seat cushion and a seat back,
A pair of side frames,
a support member disposed between the pair of side frames and receiving a load from an occupant;
a duct extending from the seat cushion toward the seat back and connecting an air blower to an air passage formed in at least one of the seat cushion and the seat back;
The duct is
a wide portion disposed on the lower side of the seat cushion and at a position closer to one of the side frames than the center of the pair of side frames in the lateral direction, extending longitudinally, and having a lateral dimension larger than an up-down dimension; ,
a narrow portion whose width in the left-right direction is smaller than the dimension in the direction perpendicular to the left-right direction;
a connecting portion connecting the narrow width portion and the wide width portion;
The duct extends diagonally rearward from a portion connected to the blower toward the outside in the left-right direction and connects to the wide portion,
The support member has a resin member at one end in the left and right direction,
The vehicle seat is characterized in that the resin member is disposed at a position overlapping the wide portion when viewed from the top and bottom.

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