JP7017697B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat provided with 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, a blower attached to the bottom surface of the seat cushion, and a duct for communicating the blower and the air passage of the seat back are provided, and the blower is provided. , A vehicle seat configured to send conditioned air to an air outlet through a ventilation path or a duct is known (Patent Document 1).

Japanese Unexamined Patent Publication No. 2009-023477

By the way, in the prior art, there is a possibility that the foot of the occupant in the rear seat may hit the duct connecting the blower and the ventilation path of the seat back. Therefore, a configuration capable of suppressing the foot of the occupant in the rear seat from hitting the duct is desired. .. Further, it is desired that the seat can be made compact even in a configuration provided with a duct.

Therefore, an object of the present invention is to provide a vehicle seat capable of suppressing the foot of a occupant in the rear seat from hitting the duct.
Another object of the present invention is to make the vehicle seat 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 secure the flow rate of air flowing through the duct.
Another object of the present invention is to suppress deformation of the duct and the like.
Another object of the present invention is to reduce the influence of contact between the duct and other members.
It is also an object of the present invention to easily connect the air passage and the duct.
Another object of the present invention is to allow air to flow well in the duct.

The present invention for achieving the above object is a vehicle seat provided with a seat cushion and a seat back, the seat back from the seat cushion through a pair of side frames and the rear side of the frame of the seat cushion. The seat cushion and a duct formed in at least one of the seat backs and connecting a ventilation device are provided, and the ducts are provided at the rear of the frame of the seat cushions. It is characterized by having a retracting portion arranged at a position inside the side frame in the left-right direction and closer to one side frame than the center in the left-right direction of the pair of side frames.

According to such a configuration, since the retracting portion of the duct is arranged close to one side frame at the rear portion of the seat cushion, it is possible to prevent the feet of the occupants in the rear seats from hitting the duct. Further, since the retracting portion is arranged inside the pair of side frames in the left-right direction, the vehicle seat can be made compact left and right as compared with the case where the retracting portion is arranged outside in the left-right direction.

In the vehicle seat described above, the retracted portion may be configured to extend so as to be positioned forward as it goes downward.

According to this, since the retracting portion of the duct is arranged so as to be separated from the foot of the occupant in the rear seat at the rear of the seat cushion, it is possible to further suppress the foot of the occupant in the rear seat from hitting the duct. ..

In the vehicle seat described above, the pair of side frames includes a pair of cushion side frames constituting the left and right frames of the seat cushion, and the vehicle seat is arranged between the pair of cushion side frames and is used by an occupant. The duct may be configured to further include a support member that receives a load from the support member, and the duct has a lower inclined portion that is arranged below the support member and extends downward toward the rear.

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

In the vehicle seat described above, the duct may be arranged under the seat cushion and extend back and forth, and may have a wide portion in which the dimension in the left-right direction is larger than the dimension in the up-down direction.

According to this, since the wide portion arranged under the seat cushion has a small vertical dimension, it can be thinned vertically. As a result, the vehicle seat can be made compact up and down.

In the vehicle seat described above, the pair of side frames includes a pair of cushion side frames constituting the left and right frames of the seat cushion, and the vehicle seat is arranged between the pair of cushion side frames and is used by an occupant. A support member that receives a load from the above is further provided, and the wide portion is arranged below the support member at a position closer to the one side frame than the center in the left-right direction of the pair of side frames. can do.

According to this, when the support member receives a load from the occupant, the central part of the seat cushion bends more than the left and right ends, but the wide part is arranged at a position closer to one side frame. This makes it possible to suppress interference between the duct and the support member.

In the vehicle seat described above, the retracted portion has a narrow portion whose left-right dimension is smaller than the dimension in the direction orthogonal to the left-right direction, and the duct connects the narrow portion and the wide portion. The connecting portion may have a portion, and the connecting portion may be configured such that the dimension in the left-right direction becomes larger and the dimension in the vertical direction becomes smaller toward the wide portion from the narrow portion.

According to this, since the cross-sectional shape of the duct gradually changes from the narrow portion to the wide portion, the rigidity of the duct can be improved as compared with the case where the cross-sectional shape does not change. Further, since it is possible to suppress the reduction of the cross-sectional area of the flow path of the duct at the connection portion, it is possible to secure the flow rate of the air flowing in the duct. In addition, since the narrow portion has a shape that is strong against a load from a direction orthogonal to the left-right direction, deformation of the duct can be suppressed even when the foot of the occupant in the rear seat hits 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 the occupant, and the duct has a portion arranged on the side opposite to the occupant side of the support member. However, the support member has a plurality of arranged wire members and a resin member connecting the wire members, and the resin member is arranged so as to overlap the duct when viewed from the occupant side. Can be.

According to this, even if the support member bends and interferes with the duct, the resin member first comes into contact with the duct, so that the influence of the contact between the duct and the support member, for example, the generation of sound, is generated. It is possible to reduce the impact at the time of contact.

In the vehicle seat described above, the duct has a lower pipe portion arranged under the seat cushion, the lower pipe portion extends back and forth, and the front end is connected to the blower. One part, a second part extending diagonally rearward from the rear end of the first part toward the outside in the left-right direction, a third part extending rearward from the rear end of the second part, and upward from the third part. It can be configured to have a branch pipe portion that extends and is connected to a ventilation path formed in the seat cushion.

According to this, since the branch pipe portion can be provided in the seat cushion at a position avoiding, for example, a wire member, the air passage formed in the seat cushion and the duct can be easily connected. can.

In the vehicle seat described above, the lower pipe portion has a fourth portion extending diagonally rearward from the rear end of the third portion toward the outside in the left-right direction, and a fifth portion extending rearward from the rear end of the fourth portion. It can be configured to have a portion.

According to this, since the duct can be arranged so as to gradually approach one side frame, a sudden change in the flow path can be suppressed, and air can flow well in the duct.

According to the present invention, it is possible to prevent the feet of the occupants in the rear seats from hitting the duct. In addition, the vehicle seat can be made compact.

Further, according to the present invention, since the evacuation portion extends so as to be positioned forward as it goes downward, it is possible to further suppress the foot of the occupant in the rear seat from hitting the duct.

Further, according to the present invention, it is possible to suppress the interference between the duct and the support member by having the lower inclined portion extending so as to be positioned downward as the duct moves backward on the lower side of the support member.

Further, according to the present invention, the duct has a wide portion under the seat cushion, so that the vehicle seat can be made compact.

Further, according to the present invention, since the wide portion is arranged on the lower side of the support member at a position closer to one side frame than the center in the left-right direction, it is possible to suppress the interference between the duct and the support member. ..

Further, according to the present invention, the rigidity of the duct can be improved by having the duct having a wide portion, a narrow portion and a connecting portion. In addition, the flow rate of air flowing in the duct can be secured. In addition, deformation of the duct can be suppressed.

Further, according to the present invention, since the resin member of the support member is arranged so as to overlap the duct when viewed from the occupant side, the influence of contact between the duct and the support member can be reduced.

Further, according to the present invention, the lower pipe portion of the duct has a branch pipe portion extending from the first portion, the second portion, the third portion and the third portion, whereby the ventilation path and the duct formed in the seat cushion. Can be easily connected.

Further, according to the present invention, the lower pipe portion further has the fourth portion and the fifth portion, so that air can flow well in the duct.

It is a figure which shows the vehicle seat as the vehicle seat which concerns on embodiment. It is sectional drawing of the vehicle seat. It is a figure which shows the seat frame, the support member and the pressure receiving member. It is the figure which looked at the seat cushion from the top. It is the figure which looked at the back frame and a pressure receiving member from the front. It is a figure which shows the duct. It is the figure which looked at the cushion frame, the support member, the blower, and the duct from the bottom. It is a figure which looked at the back frame, a pressure receiving member and a duct from the rear. It is the figure which looked at the back frame which attached the cover member from the rear. It is a perspective view which looked at the side frame cover from the inside in the left-right direction. It is a perspective view which looked at the side frame cover from the outside in the left-right direction. It is a figure which shows the structure of a cushion pad. It is the figure which looked at the cushion pad from the top. It is a figure which shows the structure of a back pad. It is the figure which looked at the back pad from the front. FIG. 15 is a cross-sectional view taken along the line XX of FIG. It is a figure which shows the modification of the side frame cover. It is a figure which shows the deformation example of a pressure receiving member and a duct.

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

As shown in FIG. 2, in the vehicle seat S, the seat frame F (see FIG. 3) constituting the seat frame is covered with a pad P made of urethane foam or the like and skins U1 and U2 made of cloth or leather. It is composed of things. Although the details will be described later, the pad P has the ventilation passages A1 and A2 formed inside and the first ventilation holes H1 and H2 formed so as to communicate with the ventilation passages A1 and A2 from the surface on the occupant side. The vehicle seat S is configured to blow out the air blown from the blower device 70 from the first ventilation holes H1 and H2 toward the occupant sitting on the seat through the duct D and the ventilation passages A1 and A2. Has been done.

As shown in FIG. 3, the seat frame F has a cushion frame F1 constituting the frame of the seat cushion S1 and a back frame F2 constituting 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 rotatably supports the seat back S2 with respect to the seat cushion S1. In the present embodiment, regarding the seat cushion S1, the upper side corresponds to the "occupant side" and the lower side corresponds to the "opposite side to the occupant side". Further, regarding the seat back S2, the front side corresponds to the "occupant side" and the rear side corresponds to the "opposite side to the occupant side" in a state where the seat back S2 is not tilted by the reclining mechanism RL.

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 constituting the left and right frames of the seat cushion S1, and are arranged apart from each other in a state of facing each other in the left-right direction. The cushion side frame 11 is made of sheet metal and is formed in a long shape in the front and rear.

The pan frame 12 is a plate-shaped member that connects the front portions of the pair of cushion side frames 11 to each other, 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 a metal pipe material, are arranged apart from each other in the front-rear direction, and are provided so as to connect a pair of cushion side frames 11. Specifically, the rear pipe 13 is arranged behind the pan frame 12 so as to be separated from the pan frame 12, and connects the rear portions of the pair of cushion side frames 11. Further, the front pipe 14 is arranged in front of the rear pipe 13 so as to be separated from the rear pipe 13, and connects the front portions of the pair of cushion side frames 11. The front pipe 14 is arranged below the pan frame 12.

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

The wire member 31 is made of a metal wire and is erected on the pan frame 12 and the rear pipe 13. The wire member 31 mainly has 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 hooking portion 31D that is hooked on the hook portion 12H formed on the pan frame 12. The front end portion of the first extending portion 31A including the front hooking portion 31D is coated with a resin, whereby the generation of sound due to the contact between the wire member 31 (support member 30) and the pan frame 12 is suppressed. There is.
The second extending portion 31B extends diagonally upward from the rear end of the first extending portion 31A.
The rear side hooking portion 31C is a portion to be hooked on the rear pipe 13, and extends from the upper end of the second extending portion 31B and is curved so as to form 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 member 31. The resin member 32 is made of resin and is integrally formed with the wire member 31 in a state of covering the entire circumference of a part of the wire member 31 by insert molding or the like. 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 vicinity of the central portion of the four wire members 31 in the front-rear direction.
The second resin member 32B is arranged behind the first resin member 32A, and connects the vicinity of the central portion in the front-rear direction of the two wire members 31 arranged at the center in the left-right direction.
The third resin member 32C is arranged on both the left and right sides of the second resin member 32B, and extends to the left and right of the first extending portion 31A of the wire member 31 arranged outside in the left and right direction, and the outside of the portion in the left and right direction. It connects to the part that extends backward from the end of.
The resin members 32A to 32C are formed with substantially rectangular through holes (reference numerals omitted) that penetrate vertically. 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 arranged behind the resin members 32B and 32C, and connects the rear ends of the first extending portions 31A of the four wire members 31 to each other.
The fifth resin member 32E connects the rear ends of the two wire members 31 arranged adjacent to each other, specifically, the rear hooking portions 31C. The fifth resin member 32E covers the rear side hooking portion 31C, whereby the generation of sound due to the contact between the support member 30 and the rear pipe 13 is suppressed.

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 apart from each other in a state of facing each other in the left-right direction. The sheet metal frame 22 is made of sheet metal and is formed in a long shape that is long in the vertical direction.

The pipe frame 23 is made of a metal pipe material and has a pair of left and right upper side frames 23A extending substantially vertically and an upper frame 23B extending so as to connect the upper ends of the upper side frames 23A. The pair of upper side frames 23A constitutes a pair of backside frames 21 together with the pair of sheet metal frames 22 by connecting the lower portion to the upper part of the sheet metal frame 22 by welding. The pair of backside frames 21 constitutes the left and right frames of the seat back S2. In the present 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 to each other, and is made of sheet metal. The left and right ends of the lower frame 24 are connected by welding to the left and right inward extending portions of the rear ends of the sheet metal frame 22 constituting the backside frame 21.
The crosslinked frame 25 is a member that connects the upper portions of the pair of backside frames 21 to each other, and is made of sheet metal. The left and right ends of the crosslinked frame 25 are connected to the upper portion of the upper side frame 23A constituting the backside frame 21 by welding or the like. The cross-linking frame 25 has a lower extending portion 25A extending forward at the lower end, and the left and right ends of the lower extending portion 25A penetrate vertically into which a wire member 60 described later is inserted. The 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 alternately bending a metal wire in the vertical direction. The S spring 40 is arranged above the lower frame 24 and is erected on the pair of backside frames 21. Specifically, the S spring 40 is connected in a state of being erected on the pair of backside frames 21 by inserting the left and right ends into the spring engaging portion 22A provided at the lower part of the sheet metal frame 22 from above. ing.

The pressure receiving member 50 is a plate-shaped member that receives a load from an 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. Further, the lower end portion of the pressure receiving member 50 is arranged on the front side of the S spring 40. The pressure receiving member 50 has an opening 50A penetrating back and forth. The opening 50A is a hole for passing the duct D, and is formed in a substantially rectangular shape long to the left and right. The opening 50A is arranged at the center of the lower portion of the pressure receiving member 50 in the left-right direction. Specifically, the opening 50A is arranged between a pair of extending portions 61 of the wire member 60, which will be described later. Further, the opening 50A is arranged at 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 has 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 extending portions 61 extend in the vertical direction (orthogonal direction orthogonal to the left-right direction) as a predetermined direction, and are arranged side by side in the left-right direction (direction orthogonal to the predetermined direction).
The inclined portion 62 extends diagonally upward from the upper end of the extending portion 61 to the outside in the left-right direction.
The upper connecting portion 63 extends upward from the upper end of the inclined portion 62.
The lower connecting portion 64 connects a pair of left and right extending portions 61, an inclined portion 62, and an 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 the left and right ends of the lower end portion, it bends and extends inward in the left-right direction of the extending portion 61. It is connected to the lower end.

In the wire member 60, the lower connecting portion 64 is fastened to the front side of the lower frame 24, and the upper connecting portion 63 is inserted into the support hole 25B (see FIG. 3) formed in the lower extending portion 25A of the bridge frame 25. Therefore, it is connected to the back frame F2. The pressure receiving member 50 is arranged on the front side of the pair of extending portions 61 of the wire member 60, and is connected to the back frame F2 via the wire member 60 by being fastened to the extending portion 61 by a binding band or the like (not shown). There is. The pair of extending portions 61 are arranged at positions overlapping with the pressure receiving member 50 when viewed from the front side.

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

The duct D is a member that connects the ventilation passages A1 and A2 formed in the pads P of the seat cushion S1 and the seat back S2 to the blower device 70, and passes from the lower side of the seat cushion S1 to the rear side of the cushion frame F1. It extends toward the seat back S2. As shown in FIG. 6, the duct D includes a first duct D1 and a second duct D2 connected to the rear end portion of the first duct D1. The first duct D1 mainly has a lower pipe portion 110, a connecting portion 120, and a first narrow portion 131, and the second duct D2 has a second narrow portion 132 and a flexible portion. It mainly has a bellows portion 140, 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 pipe portion 110 is a portion arranged on the lower side of the seat cushion S1, more specifically, on the lower side of the support member 30, and extends substantially back and forth. The lower pipe portion 110 includes a blower connection portion 111 as a first portion, a second portion 112, a third portion 113, a fourth portion 114, a wide portion 115 as a fifth portion, and a branch pipe portion. It also has a cushion connection portion 116 (see also FIG. 6).

The front end of the blower connection portion 111 is a portion connected to the blower device 70, and extends back and forth.
The second portion 112 extends diagonally rearward from the rear end of the blower connection portion 111 toward the outside in the left-right direction.
The third portion 113 extends rearward from the rear end of the second portion 112.
In the present embodiment, the second portion 112 gradually increases in dimension (width) in the left-right direction from the position of the rear end of the blower connection portion 111 to the rear, and the third portion 113 is connected to the blower device. The dimension in the left-right direction is larger than that of the portion 111.

As shown in FIG. 6, the cushion connecting portion 116 is a portion connected to the ventilation path A1 formed in the seat cushion S1 and extends upward from the front end portion of the third portion 113. The cushion connecting portion 116 has a bellows portion (reference numeral omitted), and has a structure that is flexible and can be expanded and contracted up and down. As shown in FIG. 4, the duct D is inserted into the ventilation passage A1 from the lower side of the cushion pad P1 described later through the U-shaped portion of the wire member 31 in which the cushion connecting portion 116 is arranged second from the right. By doing so, it is connected to the cushion pad P1. Since the cushion connecting portion 116 extends from the third portion 113 arranged at a position shifted to the right with respect to the blower connecting portion 111 (see FIG. 7), the cushion connecting portion 116 is arranged in the seat cushion S1 in the present embodiment. The cushion connecting portion 116 can be provided at a position avoiding the wire member 31 and the like. As a result, the ventilation passage A1 formed in the seat cushion S1 and the duct D can be easily connected.

Further, in the present embodiment, the left-right dimension of the third portion 113 is larger than the left-right dimension of the blower connection portion 111 (see FIG. 7), so that the cushion connection portion extending from the third portion 113 is formed. The left-right dimension of 116 can be increased. As a result, the cross-sectional area of the flow path of the cushion connecting portion 116 can be secured, so that air can be satisfactorily flowed between the inside of the duct D and the ventilation 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 toward the outside in the left-right direction.

The wide portion 115 extends rearward from the rear end of the fourth portion 114. As shown in FIG. 6, in the wide portion 115, the dimension D11 in the left-right direction is larger than the dimension D12 in the up-down direction. In other words, the wide portion 115 has a vertically flat cross-sectional shape. Further, in the present embodiment, not only the wide portion 115 but also the entire lower pipe portion 110 has a vertically flat cross-sectional shape. Since the lower pipe portion 110 including the wide portion 115, which is arranged on the lower side of the seat cushion S1, has such a small vertical dimension, it can be thinned vertically. As a result, the vehicle seat S can be made compact up and down.

Returning to FIG. 7, the wide portion 115 is located below the support member 30 and is located on one cushion side frame 11 rather than the center position in the left-right direction of the pair of cushion side frames 11 (see the alternate long and short dash line). , Is located near the cushion side frame 11 on the right. In other words, the wide portion 115 is arranged at a position closer to the cushion side frame 11 on the right side. When the support member 30 receives a load from the occupant, the central portion of the seat cushion S1 bends significantly below the left and right ends, but the wide portion 115 is arranged at a position closer to the right. Interference between the duct D and the support member 30 can be suppressed.

As shown in FIG. 2, in the present embodiment, the fourth portion 114 and the wide portion 115 constitute the lower inclined portion 180. The lower inclined portion 180 is inclined and extends so as to be positioned downward toward the rear when viewed from the left-right direction. As a result, even when the occupant sits on the seat and the support member 30 bends downward, the interference between the duct D and the support member 30 can be suppressed.

The first narrow portion 131 and the second narrow portion 132 are portions arranged behind the cushion frame F1 and extend substantially vertically. The front-rear and left-right dimensions of the second narrow portion 132 are slightly larger than the front-rear and left-right dimensions of the outside of the first narrow portion 131, and the second narrow portion 132 fits into the upper end portion of the first narrow portion 131. It fits. As a result, the first duct D1 and the second duct D2 are connected. As shown in FIG. 6, in the first narrow portion 131 and the second narrow portion 132, the dimension D21 in the left-right direction is smaller than the dimension D22 in the substantially front-rear direction orthogonal to the left-right direction. In other words, the first narrow portion 131 and the second narrow portion 132 have a flat cross-sectional shape on the left and right. In this embodiment, not only the narrow portions 131 and 132 but also the bellows portion 140 has a flat cross-sectional shape on the left and right.

The connecting portion 120 is a portion connecting the first narrow portion 131 (narrow portion) and the wide portion 115. The connecting portion 120 has a shape in which the dimension in the left-right direction gradually increases and the dimension in the vertical direction gradually decreases toward the wide portion 115 from the first narrow portion 131. As a result, the cross-sectional shape of the duct D gradually changes from the first narrow portion 131 to the wide portion 115, so that the rigidity of the duct D is improved as compared with the case where the cross-sectional shape does not change. Can be done. Further, since it is possible to prevent the cross-sectional area of the flow path of the duct D from becoming small at the connection portion 120, it is possible to secure the flow rate of the air flowing in the duct D.

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 stretchable. As shown in FIG. 2, the bellows portion 140 is arranged behind the cushion frame F1, specifically behind the rear pipe 13. Further explaining, the bellows portion 140 is located above the lower end 13A of the rear pipe 13. Further, the bellows portion 140 is arranged at a position where the upper end thereof is directly behind the lower frame 24, in other words, at a position where the upper end overlaps with the lower frame 24 when viewed from the rear side.

In the present embodiment, the first narrow portion 131, the second narrow portion 132, and the bellows portion 140 constitute a retracting portion 190. The retracting portion 190 is inclined and extended so as to be positioned forward as it goes downward. As shown in FIG. 8, the retracting portion 190 is arranged at a position inside the pair of cushion side frames 11 in the left-right direction. As a result, the vehicle seat S can be made compact to the left and right as compared with the case where the retracting portion 190 is arranged at a position outside the pair of cushion side frames 11 in the left-right direction. Further, the retracting portion 190 is arranged behind the cushion frame F1 at a position closer to the right (one) cushion side frame 11 than the position at the center in the left-right direction of the pair of cushion side frames 11 (see the alternate long and short dash line). There is. In other words, the retracting portion 190 is arranged at a position closer to the cushion side frame 11 on the right side.

Further, in the duct D, the retracting portion 190, which is a portion passing through the rear side of the rear pipe 13, is arranged at different positions in the left-right direction with respect to the rear hooking portion 31C of the wire member 31. Specifically, the retracting portion 190 is arranged on the right side of the rear hooking portion 31C located on the far right. Further, the duct D is arranged at a different position 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 retracted 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 far right when viewed from the rear side. Furthermore, in the present embodiment, the retracting portion 190 and the wide portion 115 are arranged so as not to overlap with the second extending portion 31B when viewed from any of the front-back, left-right, and up-down directions. As a result, even when the occupant sits on the seat and the wire member 31 (support member 30) bends downward, the interference between the duct D and the wire member 31 can be suppressed.

The first flat portion 150 extends diagonally upward from the upper end of the retracting portion 190 (bellows portion 140) toward the center in the left-right direction of the pair of backside frames 21. The first flat portion 150 is arranged on the rear side of the lower frame 24. As shown in FIG. 6, the dimension D41 in the front-rear direction (opposite direction facing the lower frame 24) of the first flat portion 150 is smaller than the dimension D42 in the substantially vertical direction orthogonal to the front-rear direction. In other words, the first flat portion 150 has a flat cross-sectional shape in the front-rear direction. As a result, the first flat portion 150 can be thinned in the front-rear direction, so that the vehicle seat S can be made compact in the front-rear direction. Further, since a gap can be secured between the first flat portion 150 and the lower frame 24 while reducing the size, 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 behind the S spring 40. In the present embodiment, the second flat portion 160 and the first flat portion 150 have substantially the same dimensions in the front-rear direction. The second flat portion 160 has a dimension D41 (see FIG. 6) in the front-rear direction (opposite direction facing the S spring 40) smaller than the 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 in the front-rear direction. As a result, the second flat portion 160 can be thinned in the front-rear direction, so that the vehicle seat S can be made compact in the front-rear direction. Further, since a gap can be secured between the second flat portion 160 and the S spring 40 while reducing the size, 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 ventilation path A2 formed in the seat back S2, and extends diagonally 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 ventilation passage A2 from the rear side of the back pad P2, which will be described later, through the opening 50A formed in the pressure receiving member 50.

As shown in FIG. 4, a known weight sensor WS as a sensor is arranged on one side of the pair of cushion side frames 11, specifically, on the lower side of the left cushion side frame 11. In the present embodiment, the duct D has a right cushion side frame 11 which is the other of the pair of cushion side frames 11 rather than the left cushion side frame 11 which is one of the pair of cushion side frames 11 in the left-right direction. It is located close to. In other words, the duct D is arranged at a position close to the cushion side frame 11 in which the weight sensor WS is not arranged in the left-right direction. As a result, it is possible to suppress interference between the duct D and the weight sensor WS, an electric wire (not shown) extending from the weight sensor WS, and the like.

Further, the resin member 32 constituting the support member 30 is arranged so as to overlap the duct D when viewed from above. Specifically, the first resin member 32A is arranged on the upper side of the third portion 113 so that the right side portion overlaps with the third portion 113 of the duct D when viewed from above. Further, the third resin member 32C on the right is arranged above the wide portion 115 so as to overlap the wide portion 115 of the duct D when viewed from above. Further, the fourth resin member 32D is arranged on the upper side of the wide portion 115 so that the right end portion overlaps with the wide portion 115 when viewed from above. As a result, even if the support member 30 bends downward and interferes with the duct D when the occupant sits on the seat, the resin members 32A, 32C, 32D first come into contact with the duct D, so that the duct It is possible to reduce the influence of contact between D and the support member 30, for example, the generation of sound and the impact at the time of contact.

Further, as shown in FIG. 7, in the present embodiment, in the lower pipe portion 110, the second portion 112 extends diagonally rearward to the right and approaches the cushion side frame 11 on the right, and the third portion 113 substantially straightens rearward. After extending, the fourth portion 114 extends diagonally rearward to the right and is provided so as to be closer to the right cushion side frame 11, so that the duct D is arranged so as to gradually approach the right cushion side frame 11. Can be done. As a result, abrupt changes in the flow path in the duct D can be suppressed, so that air can flow well in 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 a portion where the duct D connects to the ventilation path A2 of the seat back S2, from the rear side. The cover member 80 is made of resin or the like and is formed in a long plate shape on the left and right. The cover member 80 is attached by fixing the left and right ends to the left and right inwardly extending portions of the rear ends of the pair of backside frames 21 by bolting or the like. By providing such a cover member 80, it is possible to protect the portion where the duct D and the pad P (back pad P2) of the seat back S2 are connected by the cover member 80.

As shown in FIGS. 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 of the rear end portion of the right cushion side frame 11 in the left-right direction. The side frame cover portion 91 is arranged so as to extend to the front side, the lower side, and the rear side of the lower end portion of the back side frame 21.

The duct cover portion 92 is a portion behind the cushion frame F1 that covers the retracting portion 190 that is a part of the duct D. Specifically, the duct cover portion 92 is arranged 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 portion 92 has a first side cover portion 92A extending rearward from the rear end of the side frame cover portion 91 to a position behind the retracting portion 190, and the duct cover portion 92 inward in the left-right direction from the rear end of the first side cover portion 92A. It has a rear cover portion 92B that extends toward and covers the retracting portion 190 later. The rear cover portion 92B has a bow-shaped cross-sectional shape that is convex diagonally downward and rearward, and extends so as to be positioned forward along the retracting portion 190 toward the bottom.

The reclining mechanism cover portion 93 is a portion that covers the reclining mechanism RL, and is formed in a substantially cup shape with the inner side and the lower side in the left-right direction open. The reclining mechanism cover portion 93 is formed so as to extend from the side frame cover portion 91 along the peripheral surface of the reclining mechanism RL, and covers the rear side, the upper side, and the front side of the reclining mechanism RL, and the reclining mechanism. It mainly has a second side cover portion 93B that covers the outside of the RL in the left-right direction.

The side frame cover portion 91, the duct cover portion 92, and the reclining mechanism cover portion 93 may be integrally formed as one component, or may be partially configured as a separate component. As an example, in the duct cover portion 92, the duct cover portion 92 is integrally formed with the side frame cover portion 91, the reclining mechanism cover portion 93 is formed as a separate body, and the duct cover portion 92 is formed at the rear end portion of the side frame cover portion 91. By engaging the claws provided in the reclining mechanism cover portion 93 with the holes provided, the reclining mechanism cover portion 93 can be configured to be attached to the side frame cover portion 91.

By integrally providing the duct cover portion 92 and the side frame cover portion 91, it is not necessary to separately provide the cover of the cushion side frame 11 and the cover of the duct D, so that the number of parts of the vehicle seat S can be reduced. .. Further, when the side frame cover portion 91, the duct cover portion 92, and the reclining mechanism cover portion 93 are integrally provided, the side frame cover 90 has a function of not only protecting the duct D but also protecting the reclining mechanism RL. Therefore, the number of parts of the vehicle seat S can be further reduced.

As shown in FIG. 2, the pad P includes a cushion pad P1 constituting the pad of the seat cushion S1 and a back pad P2 constituting 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 to the front side of the central portion P21.

As shown in FIG. 12, the cushion pad P1 has a plate-shaped second member 210 formed with a groove 211 forming the ventilation path A1 and a plate-shaped second member formed so that the first ventilation hole H1 penetrates vertically. It is configured to include the member 220. Further, the first member 210 includes a first member main body 230 and a plate-shaped groove forming member 240 in which a groove 211 is vertically penetrated. The groove forming member 240 is arranged so as to overlap the upper surface of the first member main body 230, and the second member 220 is arranged 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 constituting the 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 the left and right sides of the main body central portion 231. The central portion 231 of the main body has a recess 232 in the front side portion in which the groove forming member 240 and the second member 220 are arranged so as to overlap each other. A second vent 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 passage 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 alternate long and short dash line) of the cushion pad P1.

The groove forming member 240 has a groove 211 penetrating vertically, which constitutes the ventilation path A1. In the ventilation passage A1 of the cushion pad P1, the groove forming member 240 and the second member 220 are arranged in this order on the recess 232 of the first member main body 230, and the upper and lower portions of the groove 211 are the second member 220 and the first. It is formed by being closed by the member main body 230. The air passage A1 includes a first air passage 261, a second air passage 262, a third air passage 263, a fourth air passage 264, and a fifth air passage 265 when viewed from above.

The first air passage 261 extends in a direction intersecting in the left-right direction, specifically, in a substantially front-rear direction. The rear end of the first air passage 261 communicates with the blower device 70 through the fourth air passage 264, the fifth air passage 265, the second air hole 250, and the duct D.
The second air passage 262 extends in a direction different from the direction in which the first air passage 261 extends from the front end, which is the other end of the first air passage 261, specifically, inward in the left-right direction.
The third air passage 263 is a direction that intersects in the left-right direction from the inner end in the left-right direction, which is the end opposite to the first air passage 261 side of the second air passage 262, specifically, the first air passage 261. It extends substantially parallel to the first air passage 261 toward the rear end side.

In the present embodiment, two substantially U-shaped flow paths composed of the first air passage 261 and the second air passage 262 and the third air passage 263 are formed symmetrically with respect to the center in the left-right direction of the cushion pad P1. ing. As a result, the occupant can be supported in a well-balanced manner at the portion of the cushion pad P1 where the ventilation path A1 is not formed. Even in the configuration including the seat, the seating feeling when sitting on the seat can be improved.

The fourth air passage 264 is a flow path connecting the rear ends of the left and right first air passages 261 and extends substantially to the left and right.
The fifth ventilation passage 265 is a flow path connecting the second ventilation hole 250 and the fourth ventilation passage 264, and extends substantially in the front-rear direction. Specifically, the fifth ventilation passage 265 extends diagonally forward toward the center of the cushion pad P1 in the left-right direction from the second ventilation hole 250 arranged at a position shifted to the right from the center of the cushion pad P1 in the left-right direction. It is connected to the central 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 communicating with the ventilation passage A1. The first ventilation hole H1 of the cushion pad P1 includes a first hole 271, a second hole 272, a third hole 273, and a fourth hole 274.

The first hole 271 is a hole communicating with the first air passage 261 and is formed in plurality along the first air passage 261 extending substantially in the front-rear direction. Specifically, the first hole 271 is arranged side by side in the left-right direction of two first holes 271A arranged substantially front and back along the first air passage 261 and the first hole 271A located later. Includes one first hole 271B made.
The second hole 272 is a hole communicating with the third ventilation passage 263, and is formed in plurality along the third ventilation passage 263 extending substantially in the front-rear direction. Specifically, the second hole 272 is composed of two holes arranged substantially front and back along the third ventilation path 263.
The rows of the first holes 271A and the rows of the second holes 272 that are lined up in the front-rear direction are arranged side by side in the direction in which the second air passage 262 extends, specifically, in the left-right direction.

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

As shown in FIG. 4, the front pipe 14 is arranged under the cushion pad P1 in a state where the cushion pad P1 covers the cushion frame F1. In this state, the front pipe 14 is arranged at a position different from that of the first air passage 261 and the second air passage 262 and the third air passage 263 when viewed from above. Specifically, the front pipe 14 is arranged behind the first air passage 261 and the second air passage 262 and the third air passage 263 when viewed from above.

Further, in a state where the cushion pad P1 covers the cushion frame F1, the pan frame 12 is arranged on the lower side of the front end portion of the cushion pad P1 and supports the cushion pad P1 from the lower side. In this state, the pan frame 12 is arranged so as to overlap the first air passage 261 and the second air passage 262 and the third air passage 263 when viewed from above. In other words, the pan frame 12 is arranged below the portion where the first air passage 261 and 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 ventilation passages 261 to 265 are formed is more easily deformed than the portion in which the ventilation passages 261 to 265 are not formed, but in the present embodiment, the ventilation passages 261 to 263 are formed. Since the formed portion can be supported by the pan frame 12, excessive deformation of the cushion pad P1 can be suppressed. In particular, in the present embodiment, since the easily deformable portion where the ventilation passages 261 to 263 of the cushion pad P1 are formed can be supported by the plate-shaped pan frame 12 on the surface, excessive deformation of the cushion pad P1 is further suppressed. can do.

As shown in FIG. 14, the back pad P2 is a plate-shaped second member formed so that the first member 310 in which the groove 311 constituting the ventilation path A2 is formed and the first ventilation hole H2 penetrate in the front-rear direction. It is configured to include a member 320 and a third member 330. The second member 320 and the third member 330 are arranged so as 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 occupant 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 back and forth.
In the ventilation path A2 of the back pad P2, the second member 320 and the third member 330 are arranged so as to overlap each other in front of the first member 310, and the front side of the groove 311 is closed by the second member 320 and the third member 330. It is formed by that. The ventilation passages A2 include 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 fourth ventilation passages, and two. It includes a fifth road 365, a sixth road 366, a seventh road 367, and a pair of branch roads 368 as a first air passage.

The first road 361, the second road 362, the third road 363, the fourth road 364, and the fifth road 365 are formed near the center in the vertical direction of the central portion P21.
The first road 361 extends in the left-right direction. The second ventilation hole 350 communicates with the first passage 361 constituting the ventilation passage A2 from the rear surface of the first member 310 (back pad P2). 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 road 362 extends diagonally upward from the left and right ends of the first road 361 to the outside in the left-right direction.
The third road 363 extends in the vertical direction (orthogonal direction orthogonal to the left-right direction), specifically, upward from the upper end of the second road 362. The pair of third roads 363 are arranged side by side in the left-right direction.
The fourth road 364 extends diagonally upward in the left-right direction from the upper end of the third road 363, and the upper ends are connected to each other. In other words, the pair of fourth roads 364 connect the upper ends of the pair of third roads 363 to each other.

The fifth road 365 is arranged at a position inside the pair of third roads 363 in the left-right direction, and extends in the left-right direction to connect the pair of third roads 363 to each other. The two fifth roads 365 are arranged side by side in the vertical direction. The first road 361, the second road 362, the third road 363, and the fourth road 364 have substantially the same dimensions (depth) in the front-rear direction of the groove, but the fifth road 365 has the dimensions in the front-rear direction of the groove. Is smaller (shallow) than these.

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

The branch road 368 extends from the vicinity of the center of the third road 363 in the vertical direction toward the outside in the left-right direction along the front surface of the back pad P2. Specifically, as shown in FIG. 15, the branch road 368 moves up and down so as to be located on the upper side (the other side in the orthogonal direction) from the vicinity of the center of the third road 363 in the vertical direction toward the outer side in the left-right direction of the back pad P2. It extends diagonally to the direction. In other words, the branch road 368 extends from the vicinity of the center of the third road 363 in the vertical direction toward the diagonally upward side in the left-right direction. In this embodiment, the portion extending downward (one side in the orthogonal direction) from the position connected to the branch road 368 of the third road 363, the second road 362, and the first road 361 are the branch road 368. It corresponds to the "second ventilation path" that communicates with 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) communicating with the ventilation passage A2. The first ventilation hole H2 of the back pad P2 is formed in the first hole 371, the second hole 372, the third hole 373, the fourth hole 374, the fifth hole 375, and the third member 330 formed in the second member 320. It includes a sixth hole 376 formed.

The first hole 371 is a hole communicating with the vicinity of the lower end portion of the third road 363.
The second hole 372 is a hole that communicates with the vicinity of the center in the vertical direction of the third road 363, in other words, the position where the branch road 368 of the third road 363 is connected.
The third hole 373 is a hole communicating with the vicinity of the lower end portion of the fourth road 364.
The fourth hole 374 is a hole communicating with the fifth road 365, and is formed at a total of six holes, one at a position facing the center and near both ends in the left-right direction of each fifth road 365.
The fifth hole 375 is a hole communicating with the branch road 368. The fifth hole 375 is arranged at the end of the central 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 communicating with the seventh road 367, and is formed one by one at positions facing the left and right ends of the seventh road 367.

The back pad P2 has a substantially U-shaped suspension groove 380 on both the left and right sides and the upper side (one side in the direction orthogonal to the left and right direction) of the second member 320 as a ventilation hole forming portion. In the back pad P2, a suspension wire (not shown) for suspending the skin U2 (see FIG. 16) is embedded in the suspension groove 380 along the suspension groove 380 by insert molding, and the suspension wire is suspended. It is partially exposed from a plurality of holes 381 formed in the bottom of the recess 380. The skin U2 of the seat back S2 is fastened to the back pad P2 by engaging a hook or the like provided on the skin U2 with a portion exposed from the hole 381 of the suspension wire.

As shown in FIG. 16, in the branch path 368, the epidermis U2 is suspended in the suspension groove 380, so that the outer end in the left-right direction, which is one end, is closed by the epidermis U2. The branch path 368 has a facing surface 368A facing the fifth hole 375. The facing surface 368A is arranged at the outer end of the branch path 368 in the left-right direction. Specifically, the facing surface 368A is arranged at a position outside the left-right direction of the branch path 368 with respect to the center position in the left-right direction. The facing surface 368A is inclined so as to approach the front side as it approaches the edge of the back pad P2 viewed from the front side, specifically, the outer edge in the left-right direction. The facing 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 with an adhesive or the like.

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

The cushion pad P1 and the back pad P2 are configured to include the first members 210 and 310 in which the ventilation passages A1 and A2 are formed, and the second members 220 and 320 in which the first ventilation holes H1 and H2 are formed. Therefore, the pad P can be easily formed as compared with the case where the pad having the ventilation passages A1 and A2 and the first ventilation holes H1 and H2 is integrally formed. Further, it is possible to easily form the cushion pad P1 having the ventilation passage A1 including the ventilation passages 261 to 263 and the back pad P2 having the ventilation passage A2 in which the inclined facing surface 368A is formed. Further, regarding the cushion pad P1, since the first member 210 is composed of the first member main body 230 and the groove forming member 240, the first member 210 has a ventilation path A1 having a complicated shape including the ventilation paths 261 to 263. One member 210 can be easily formed. Thereby, the cushion pad P1 can be formed more easily.

According to the present embodiment described above, as shown in FIG. 2, the duct D (retracted 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 seat occupants from hitting the duct D.

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

Further, since the bellows portion 140 is located above the lower end 13A of the rear pipe 13, the foot of the occupant in the rear seat is duct D as compared with the case where the bellows portion is located below the lower end 13A of the rear pipe 13. It is possible to further suppress the contact with the bellows portion 140.

Further, since the narrow portions 131 and 132 have small dimensions (width) in the left-right direction, it is possible to prevent the feet of the occupants in the rear seats from hitting the narrow portions 131 and 132 of the duct D. In addition, the narrow portions 131 and 132 have small left and right dimensions, large front and rear dimensions, and a shape that is strong against loads from the substantially front and rear directions. Even when it hits 131 and 132, deformation of the duct D and the like can be suppressed.

Further, according to the present embodiment, in the rear part of the seat cushion S1, as shown in FIG. 8, the retracting part 190 of the duct D is arranged closer to the right cushion side frame 11, so that the rear seat is arranged. It is possible to prevent the foot of the occupant from hitting the duct D.

Further, since the retracting portion 190 is inclined and extended so as to be positioned forward as it goes downward, the retracting portion 190 of the duct D is arranged so as to be separated from the feet of the occupant in the rear seat at the rear portion of the seat cushion S1. Will be. As a result, it is possible to further prevent the feet of the occupants in the rear seats from hitting the duct D.

Further, according to the present embodiment, since the back connection 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, the vehicle seat S has a plate shape. Even in the configuration including the pressure receiving member 50, the ventilation passage A2 of the back pad P2 and the duct D can be easily connected.

Further, since the opening 50A is arranged at a position where it does not overlap with the S spring 40 when viewed from the rear side, the back connection portion 170 of the duct D can be easily passed through the opening 50A of the pressure receiving member 50. As a result, the ventilation path A2 of the back pad P2 and the duct D can be more easily connected.

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 communicating with the first ventilation passage 261 and the third ventilation passage 263. Since it includes the second hole 272, air can pass through a wide range of the sheet surface. On the other hand, since the first air passage 261 and the second air passage 262 and the third air passage 263 can be formed as continuous flow paths, the number of flow paths communicating with the blower 70 can be reduced. As a result, it is possible to suppress the weakening of the air flow in the air passage A1, so that the air can flow well in the cushion pad P1.

Further, since the row of the first hole 271A and the row of the second hole 272 are arranged side by side in the left-right direction, air can be passed over a wider range on the sheet surface, and a plurality of first ventilation holes H1 can be provided. It can be arranged efficiently.

Further, since the fifth air passage 265 extends diagonally forward from the second air hole 250 toward the center in the left-right direction and is connected to the fourth air passage 264, the fifth air passage hole 250 and the fourth air passage 264 are connected to each other. There is no sharply bent portion in the ventilation path 265. As a result, the air is sent 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 and the second ventilation passage 262 and the third ventilation passage 263. It can flow well to the ventilation hole H1.

Further, according to the present embodiment, as shown in FIG. 16, the facing 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 hole 375 can flow along the slope of the facing surface 368A. This allows air to flow satisfactorily.

Further, since the facing surface 368A is arranged at the outer end of the branch path 368 in the left-right direction, the facing surface allows air to flow as compared with the case where the facing surface is arranged in the middle of the long extending branch path 368. The inclination of 368A can be effectively used. This allows the air to flow better.

Further, since the fifth hole 375 is arranged at the end of the central portion P21 in the left-right direction, when air (see the broken line) is blown out from the fifth hole 375, it flows vigorously along the inclination of the facing surface 368A. Air can be blown out of the fifth hole 375 so as to graze the occupant's body. This makes it possible to increase the feeling of coolness.

Further, since the branch passage 368 extends diagonally upward on the outer side in the left-right direction so as to be 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. It can flow well from the road 363 to the branch road 368.

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 configurations as those of the above-described embodiment will be designated by the same reference numerals, and description thereof will be omitted as appropriate, and differences from the above-described embodiments will be described in detail.
For example, as shown in FIG. 17, in the side frame cover 90, the duct cover portion 92 has a rib-shaped convex portion 95 in which the duct cover portion 92 projects from the inner surface toward the duct D, and the convex portion 95 is a bellows portion 140. It may be configured to enter the valley and engage with it. According to this, since 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, 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 opening edge portion. According to such a configuration, since the duct D can be held by the pressure receiving member 50, it is not necessary 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 opening 50A is arranged between the pair of extending portions 61 of the wire member 60 and the duct D is held by the pressure receiving member 50, the pressure receiving member 50 Since the duct D can be held at the portion having high rigidity between the pair of extending portions 61, the duct D can be firmly held by the pressure receiving member 50.

Further, in the above embodiment, the opening 50A of the pressure receiving member 50 is arranged between the pair of extending portions 61, but the present invention is not limited to this, and the opening is, for example, in the left-right direction (direction orthogonal to a predetermined direction). In, it may be arranged outside the extending portion 61. As an example, as shown in FIG. 18, the opening 50B for passing the duct D is arranged at a position outside the extending portion 61 in the left-right direction, specifically, at a position on the right side of the right extending portion 61. There is. The left-right outer portion of the pair of extending portions 61 of the pressure receiving member 50 is more likely to bend than the portion between the pair of extending portions 61. Therefore, by arranging the opening 50B in the easily flexible portion, a duct is formed in the opening 50B. D can be easily connected. The opening 50B may be arranged at a position on the left side of the left extending portion 61.

Further, in the above embodiment, the pressure receiving member 50 is connected to the back frame F2 by 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 by two wire members. good. Further, in the above embodiment, one wire member 60 has a pair of extending portions 61, but when the pressure receiving member 50 is connected to the back frame F2 by two wire members, each wire member May have a configuration having one extending portion at a time.

Further, in the above-described embodiment, the pressure receiving member 50 does not operate, but the pressure receiving member 50 is not limited to this. It may be configured so that the shape of the portion corresponding to the waist portion of the occupant can be changed to change the support state of the waist portion of the occupant. In this case, the pressure receiving member driving device such as the actuator for moving the pressure receiving member 50 is described in reference to FIG. 8, in one of the pair of backside frames 21, specifically, the left backside frame 21. It is desirable that it is arranged. Since the duct D is arranged in the left-right direction at a position closer to the right (other) backside frame 21 than the left (one) backside frame 21 of the pair of backside frames 21, the duct D and the duct D It is possible to suppress interference with the pressure receiving member driving device and the electric wire extending from the pressure receiving member driving device. Further, it is desirable that the pressure receiving member driving device is arranged inside the pair of side frames in the left-right direction. As a result, the vehicle seat can be made compact to the left and right.

Further, when the pressure receiving member driving device is arranged on the right back side frame 21 or the cushion side frame 11 and the position in the left-right direction overlaps with the duct D, the pressure receiving member driving device is positioned in the front-rear direction or the vertical direction. Is different from duct D. For example, it is desirable to arrange the pressure receiving member drive device in front and after the duct D. According to this, it is possible to suppress the interference between the duct D and the pressure receiving member driving device. Further, by arranging the duct on the lower side of the pressure receiving member driving device in the seat cushion and arranging the duct on the rear side of the pressure receiving member driving device in the seat back, it is possible to suppress the interference between the duct and the pad. .. When the pressure receiving member 50 moves back and forth, it is desirable to provide a bellows portion 171 that expands and contracts back and forth at the rear end portion of the back connecting portion 170, as shown in FIG. According to this, it is possible to prevent the duct D from coming off the back pad P2 when the pressure receiving member 50 moves. Further, the pressure receiving member driving device is not limited to the actuator, and may be, for example, a control unit that controls the actuator.

Further, in the above embodiment, the side frame cover 90 covers the rear end portion which is a part of the cushion side frame 11, but the present invention is not limited to this, and for example, the side frame cover 90 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 part of the bellows portion 140 as a flexible portion, or may be configured to cover the whole.

Further, in the above-described embodiment, as shown in FIG. 4, the pan frame 12 as a pad support member is arranged so as to overlap the entire ventilation passages 261 to 263, but the present invention is not limited to this. For example, to explain with reference to FIG. 4, the pan frame 12 is arranged so as to overlap the entire second air passage 262 and the front side portions of the first air passage 261 and the third air passage 263 when viewed from above. May be. In other words, the pad support member may be arranged so as to overlap at least a part of the first air passage, the second air passage and the third air passage. Further, 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 or the like.

Further, in the above embodiment, a plurality of first holes 271 and second holes 272 as first ventilation holes H1 are formed in the cushion pad P1, but the present invention is not limited to this, and for example, a plurality of first holes are formed. However, the configuration may have only one second hole, or vice versa. In other words, at least one first hole and one second hole may be formed. Further, in the above embodiment, the second ventilation hole 250 of the cushion pad P1 is arranged at a position shifted to the right from the center in the left-right direction, but the present invention is not limited to this, and for example, the cushion pad P1 is left from the center in the left-right direction. It may be arranged at a position shifted to the center, or may be arranged at the center in the left-right direction. Further, in the above-described embodiment, two flow paths composed of the ventilation passages 261 to 263 are formed, but the present invention is not limited to this, and the number may be three or more, or may be one.

Further, in the above-described embodiment, one end of the branch path 368 (first ventilation path) is closed, but the present invention is not limited to this, and a configuration in which the branch path 368 (first ventilation path) is not closed may be used. Further, a plurality of fifth holes 375 (first ventilation holes) communicating with the first ventilation passage may be provided for each first ventilation passage.

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

Further, in the above-described embodiment, the duct D has a bellows portion 140 as a flexible portion, but the present invention is not limited to this, and the flexible portion is not particularly limited as long as it has flexibility.

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

Further, in the above embodiment, the sirocco fan is exemplified as the blower device 70, but the present invention is not limited to this, and for example, a propeller fan or a turbo fan may be used. Further, in the above embodiment, the vehicle seat S is configured to blow out air from the first ventilation holes H1 and H2, but the present invention is not limited to this, and for example, the vehicle seat S is configured to suck air from the first ventilation holes. It may have been done. Further, the blower device may be capable of switching between blower and suction by switching the rotation direction of the impeller, for example. Further, in the above-described embodiment, the vehicle seat S is provided with the blower device 70, but the vehicle seat itself may be configured not to be provided with the blower device. In other words, the blower may be provided on the vehicle body of the vehicle 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 above embodiment, the weight sensor WS for detecting the weight of the seat is exemplified as the sensor arranged under the cushion side frame 11, but the weight sensor WS is not limited to this, and for example, the front-rear position of the seat is detected. It may be a position sensor or the like.

Further, the same configuration as the frame or pad of the seat cushion S1 described in the above embodiment may be applied to the seat back, or the same configuration as the frame or pad of the seat back S2 may be applied to the seat cushion. May be good. Further, in the above-described embodiment, the ventilation passage is formed on both the seat cushion and the seat back, but the present invention is not limited to this, and the ventilation passage may be formed only on either the seat cushion or the seat back. good.

Further, in the above-described embodiment, the vehicle seat S mounted on an automobile is exemplified as a vehicle seat, but the present invention is not limited to this, and the seat is mounted on a vehicle other than an automobile, for example, a railroad vehicle, a ship, or an aircraft. May be.

Further, each element described in the above-described embodiment and modification may be arbitrarily combined and carried out.

11 Cushion side frame 30 Support member 31 Wire member 32 Resin member 70 Blower 110 Lower pipe part 111 Blower connection part 112 2nd part 113 3rd part 114 4th part 115 Wide part 116 Cushion connection part 120 Connection part 131 1 Narrow part 132 2nd narrow part 180 Lower inclined part 190 Retracting part A1, A2 Ventilation channel D Duct S Vehicle seat S1 Seat cushion S2 Seat back

Claims (9)

A vehicle seat with a seat cushion and seat back,
A pair of side frames and
A support member arranged 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 a ventilation path and a blower formed on at least one of the seat cushion and the seat back is provided.
The duct is a retractable portion arranged at the rear portion of the seat cushion at a position inside the pair of side frames in the left-right direction and closer to one side frame than the center in the left-right direction of the pair of side frames. And has a wide portion that is arranged under the seat cushion and extends back and forth, and the dimension in the left-right direction is larger than the dimension in the up-down direction.
The retracted portion has a narrow portion whose dimension in the left-right direction is smaller than the dimension in the direction orthogonal to the left-right direction.
The duct has a connecting portion connecting the narrow portion and the wide portion.
The duct extends diagonally backward from the portion connected to the blower toward the outside in the left-right direction and connects to the wide portion.
A vehicle seat characterized in that one end of the support member in the left-right direction is arranged at a position overlapping the wide portion when viewed from the vertical direction . The pair of side frames includes a pair of cushion side frames constituting the left and right frames of the seat cushion.
Vehicle seats
A front frame that connects the front parts of the pair of cushion side frames to each other,
A rear frame for connecting the rear portions of the pair of cushion side frames is provided.
The vehicle seat according to claim 1, wherein the support member is made of a metal wire and has a plurality of wire members erected on the front frame and the rear frame. The duct is
It extends from the underside of the seat cushion through the rear side of the cushion frame constituting the frame of the seat cushion toward the seat back.
The vehicle seat according to claim 1 or 2, wherein the cushion frame has a flexible portion arranged behind the cushion frame. The back frame constituting the seat back frame is connected to the cushion frame via a reclining mechanism.
Vehicle seats
The reclining mechanism cover portion that covers the reclining mechanism and
The vehicle seat according to claim 3, further comprising a duct cover portion that covers the flexible portion of the duct adjacent to the reclining mechanism cover portion. The vehicle seat according to claim 4, wherein the duct cover portion and the reclining mechanism cover portion are integrally formed. The vehicle seat according to claim 4 or 5, wherein the reclining mechanism cover portion is provided so as to extend forward and has a side frame cover portion that covers a part of the side frame. The pair of side frames includes a pair of cushion side frames constituting the left and right frames of the seat cushion.
A weight sensor is arranged on one of the pair of cushion side frames.
One of claims 1 to 6, wherein the duct is arranged in the left-right direction at a position close to the other of the pair of cushion side frames to which the weight sensor is not arranged. The vehicle seat described in. The pair of side frames includes a pair of cushion side frames constituting the left and right frames of the seat cushion.
The vehicle seat according to any one of claims 1 to 7, wherein the duct is arranged at a position that does not overlap with the pair of cushion side frames when viewed from the vertical direction. A seat frame having a cushion frame constituting the frame of the seat cushion and a back frame constituting the frame of the seat back, and
A reclining mechanism that connects the cushion frame and the back frame,
The pad and skin that cover the seat frame,
The vehicle seat according to any one of claims 1 to 8, further comprising a headrest.

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