JP7227449B2 - vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat comprising 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 surface of the seat cushion, and a duct connecting the air blower and the air passage of the seat back are provided. , a vehicle seat that is configured to send conditioned air to an air outlet through an air passage or a duct is known (Patent Document 1).

JP 2009-023477 A

By the way, in the conventional technology, since the duct extends from the rear end of the seat cushion and is arranged to face the seat back, there is a risk that the legs of the rear seat occupant may hit the duct.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle seat that can prevent the legs of rear seat passengers from hitting the duct.
Another object of the present invention is to facilitate the work of fixing the skin of the seat cushion.
Another object of the present invention is to prevent the seat from becoming large.
Another object is to improve the rigidity of the duct.
Another object is to suppress interference between the duct and other members.
It is another object of the present invention to realize a structure that blows out and sucks air over a wide range of the seating surface of the seat cushion and seat back.
Another object of the present invention is to prevent unnecessary force from acting on the duct.
Another object of the present invention is to allow the duct to follow the reclining motion satisfactorily.
Another object is to improve the appearance of the seat provided with the duct.
Another object of the present invention is to fasten the ends of the skin member while suppressing interference between the duct and the skin member.

The present invention for achieving the above object is a vehicle seat comprising a seat cushion and a seat back, comprising left and right cushion side frames forming left and right frames of the seat cushion, and left and right cushion side frames. a rear frame that connects rear parts; a duct that is disposed across the seat cushion and the seat back and connects an air passage formed in at least one of the seat cushion and the seat back to a blower; and the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the rear frame.

According to such a configuration, the rear frame can prevent the feet of the rear seat occupant from hitting the vertically extending portion of the duct. In addition, since the duct does not pass through the rear side of the rear frame, the duct does not interfere with the structure for fixing the skin of the seat cushion to the rear frame, so that the work of fixing the skin to the rear frame can be facilitated.

The vehicle seat includes left and right back side frames that form left and right frames of the seat back, and a lower frame that connects lower parts of the left and right back side frames, and the duct extends vertically. A portion may be arranged so as to pass through the front side of the lower frame and extend from the seat cushion toward the seat back.

According to this, it is possible to prevent the rear seat passenger's feet from hitting the vertically extending portion of the duct by the lower frame.

In the vehicle seat described above, the duct may have a flexible portion, and the flexible portion may be positioned above the rear frame.

According to this, it is possible to prevent the legs of the passengers in the rear seats from coming into contact with the soft flexible portion of the duct by the rear frame.

In the vehicle seat described above, the duct has a flexible portion, and the flexible portion extends between the rear frame and the lower frame in a direction connecting the rear frame and the lower frame at the shortest distance. It can be a configuration located in between.

According to this, it is possible to prevent the rear seat passenger's leg from hitting the soft flexible portion of the duct by the rear frame or the lower frame.

In the vehicle seat described above, the duct has the vertically extending portion connecting the first part and the second part, and the connecting part between the first part and the second part extends in the front-rear direction. It can be configured to overlap with the rear frame when viewed from above.

According to this, it is possible to prevent the leg of the passenger in the rear seat from hitting the connecting portion between the first part and the second part of the duct by the rear frame.

In the above-described vehicle seat, the vertically extending portion of the duct connects the third part and the fourth part, and the connecting portion between the third part and the fourth part extends in the front-rear direction. It can be configured to overlap with the lower frame when viewed from above.

According to this, it is possible to prevent the leg of the passenger in the rear seat from hitting the connecting portion between the third part and the fourth part of the duct by the lower frame.

In the above-described vehicle seat, the cross-sectional shape of the passage of the portion of the duct positioned on the front side of the rear frame may be configured such that the dimension in the front-rear direction is smaller than the dimension in the direction orthogonal to the front-rear direction. .

According to this, since the duct can be compactly arranged in the front-rear direction on the front side of the rear frame, it is possible to suppress an increase in the size of the seat in the front-rear direction.

In the above-described vehicle seat, the cross-sectional shape of the passage of the portion of the duct positioned on the front side of the lower frame may be configured so that the dimension in the front-rear direction is smaller than the dimension in the direction orthogonal to the front-rear direction. .

According to this, since the duct can be arranged compactly in the front-rear direction on the front side of the lower frame, it is possible to suppress the seat from becoming large in the front-rear direction.

In the vehicle seat described above, the duct may be curved in a U-shape that protrudes backward below the rear frame when viewed in the left-right direction.

According to this, the rigidity of the duct can be improved. Also, interference between the duct and other members arranged below the rear frame can be suppressed.

In the vehicle seat described above, one of the seat cushion and the seat back has a first air passage and a second air passage, and the duct includes a first duct portion connected to the first air passage, It can be configured to have a second duct portion branching from the first duct portion and extending and connected to the second air passage.

According to this, since the air blower and the plurality of air passages can be connected by the ducts, it is possible to realize a structure for blowing air over a wide range of the seating surface of the seat cushion or seat back, or a structure for sucking air.

The vehicle seat may include a pad member covering the frame of the seat cushion or the seat back, and the pad member may have a concave portion in which the vertically extending portion of the duct is arranged.

According to this, it is possible to suppress interference between the duct and the pad member, so that it is possible to suppress unnecessary force from acting on the duct from the pad member. In addition, since the duct can be arranged compactly, it is possible to suppress an increase in the size of the seat.

The vehicle seat includes a cushion pad covering a frame of the seat cushion and a back pad covering a frame of the seat back, the seat back being configured to be reclinable with respect to the seat cushion, and A vertically extending portion of the duct has a flexible portion, at least a portion of which is positioned between the cushion pad and the back pad, and the seat back is positioned against the seat cushion. It can be configured such that it is curved in an arc that protrudes rearward in a seated state in which it stands upright.

According to this, the duct can favorably follow the reclining motion of the seat back.

In the vehicle seat described above, the seat back is configured to be reclinable with respect to the seat cushion, and the vehicle seat includes a cover that covers a portion of the duct extending over the seat cushion and the seat back. It can be set as the structure provided with a member.

According to this, since the duct is covered with the cover member and is not directly exposed between the seat cushion and the seat back, the appearance of the seat provided with the duct can be improved.

The vehicle seat includes a frame member forming a frame of the seat cushion or the seat back, a pad member covering the frame member, and a skin member covering the pad member. When viewed from the direction, it extends from the occupant side of the seat cushion or the seat back toward the side opposite to the occupant side, and is fastened to the engaged portion on the opposite side of the seat cushion or the seat back from the occupant side. The first tongue portion has a first end portion, and the first end portion is a first tongue portion extending from the occupant side of the seat cushion or the seat back toward the side opposite to the occupant side through one side in the left-right direction of the duct. a second tongue portion extending from the occupant side of the seat cushion or the seat back toward the side opposite to the occupant side through the other side of the duct in the left-right direction; a first engaging portion that engages with the engaging portion; and a second engaging portion that is provided on the second tongue portion and engages with an end portion of the first tongue portion on the other side in the left-right direction and the engaged portion. It can be configured to have a joint portion.

According to this, the first end portion of the skin member can be fastened to the engaged portion while suppressing interference between the duct and the skin member.

According to the present invention, the rear frame can prevent the legs of the passengers in the rear seats from coming into contact with the vertically extending portions of the duct. Also, the work of fixing the seat cushion cover to the rear frame can be facilitated.

Further, by arranging the duct so that the vertically extending portion passes through the front side of the lower frame, the lower frame can prevent the rear seat occupant's feet from hitting the vertically extending portion of the duct.

In addition, by locating the flexible portion of the duct above the rear frame, it is possible to prevent the rear frame from hitting the flexible portion of the duct with the legs of the passengers in the rear seats.

In addition, by arranging the flexible portion of the duct between the rear frame and the lower frame, it is possible to prevent the feet of rear seat occupants from hitting the flexible portion of the duct due to the rear frame or the lower frame.

In addition, since the connecting portion between the first part and the second part of the duct overlaps with the rear frame when viewed in the front-rear direction, the legs of the rear seat occupant can be connected to the first part of the duct by the rear frame. It is possible to suppress contact with the connecting portion with the second component.

In addition, since the connecting portion between the third part and the fourth part of the duct overlaps with the lower frame when viewed in the front-rear direction, the leg of the rear seat occupant can be connected to the third part of the duct by the lower frame. It is possible to suppress contact with the connecting portion with the fourth component.

Further, by configuring the cross-sectional shape of the flow path of the portion of the duct located on the front side of the rear frame so that the dimension in the front-rear direction is small, it is possible to suppress an increase in the size of the seat in the front-rear direction.

Further, by setting the cross-sectional shape of the flow path of the portion of the duct located on the front side of the lower frame to be small in the front-rear direction, it is possible to prevent the seat from becoming large in the front-rear direction.

In addition, the rigidity of the duct can be improved by forming the duct to be curved in a U-shape that becomes convex later under the rear frame. Also, interference between the duct and other members can be suppressed.

In addition, one of the seat cushion and the seat back has a first ventilation path and a second ventilation path, and the duct has a first duct portion and a second duct portion, so that the seating surface of the seat cushion and the seat back can be adjusted. It is possible to realize a configuration in which air is blown out or sucked in a wide range of .

Further, by configuring the pad member so as to have a concave portion in which the vertically extending portion of the duct is arranged, it is possible to suppress the application of unnecessary force to the duct. In addition, it is possible to suppress an increase in the size of the seat.

In addition, when the reclinable seat back is seated, the duct can follow the reclining motion of the seat back satisfactorily by arranging the flexible portion of the duct to curve in an arc shape that protrudes rearward.

In addition, by covering the portion of the duct extending over the seat cushion and the seat back with the cover member, the appearance of the seat provided with the duct can be improved.

Further, by configuring the first end of the skin member to have the first tongue portion, the second tongue portion, the first engaging portion, and the second engaging portion, the duct and the skin member While suppressing interference, the first end of the skin member can be fastened to the engaged portion.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the vehicle seat as a vehicle seat which concerns on 1st Embodiment. 1 is a cross-sectional view of a vehicle seat; FIG. It is a perspective view of a seat frame. 1 is a perspective view of a duct; FIG. 4A and 4B are cross-sectional views of the vicinity of a connection portion of a duct; FIG. FIG. 4 is a bottom view of the cushion frame, the blower and the duct; FIG. 4 is an enlarged cross-sectional view of the rear portion of the vehicle seat; FIG. 10 is a rear view of the back frame and ducts; FIG. 7 is a perspective view showing the configuration of a seat back of a vehicle seat as a vehicle seat according to a second embodiment; It is the perspective view (a) of a duct and a cover member, sectional drawing (b) of a 1st connection part, and sectional drawing (c) of a 2nd connection part. It is the figure which looked at the vehicle seat from the bottom. It is the figure which looked at the vehicle seat from the back. FIG. 4 is an enlarged cross-sectional view of the rear portion of the vehicle seat; It is the figure which looked at the cushion pad from the top. It is the figure which looked at the back pad from the back. FIG. 4 is a perspective view showing the configuration of the end portion of the seatback cover. FIG. 10 is a perspective view showing a state in which a second engaging member provided on a second tongue of the outer skin is engaged with the first tongue; FIG. 18 is a cross-sectional view (a) corresponding to the XX cross-section of FIG. 17 and a cross-sectional view (b) corresponding to the YY cross-section of FIG. FIG. 11 is a perspective view showing a state in which the third tongue of the outer skin is fastened to the wire frame; It is the figure which looked at the duct which concerns on a 1st modification from behind. It is the figure which looked at the duct which concerns on a 2nd modification from the back.

A first embodiment will be described below with reference to the accompanying drawings. In this specification, the front, rear, left, right, and top and bottom are based on the front, back, left, right, and top and bottom 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 in an automobile, and includes a seat cushion S1 and a seat back S2.

As shown in FIG. 2, the vehicle seat S is configured by covering a seat frame F (see FIG. 3) with a pad P made of urethane foam or the like and skins U1 and U2 made of cloth or leather. .

The pad P includes a cushion pad P1 forming the pad of the seat cushion S1 and a back pad P2 forming the pad of the seat back S2. The cushion pad P1 has an air passage A1 formed inside and a plurality of air holes H1 communicating with the air passage A1 from the upper surface. In addition, the back pad P2 has a ventilation path A2 formed inside and a plurality of ventilation holes H2 communicating with the ventilation path A2 from the front surface.

The ventilation paths A1 and A2 are connected to the blower device 70 through a duct D, which will be described later. The blower device 70 is a sirocco fan and is arranged below the pan frame 12 to be described later. The blower device 70 is attached to the pan frame 12 via a bracket 71 . The vehicle seat S is configured to blow air blown from the air blower 70 through the duct D and the air passages A1 and A2 from the air holes H1 and H2 toward the passenger sitting on the seat.

As shown in FIG. 3, the seat frame F includes a cushion frame F1 forming the frame of the seat cushion S1 and a back frame F2 forming the frame of the seat back S2. The seat cushion S1 is configured by covering the cushion frame F1 with the cushion pad P1 and the skin U1, and the seat back S2 is configured by covering the back frame F2 with the back pad P2 and the skin U2 (Fig. 1 reference).

The cushion frame F1 includes left and right cushion side frames 11, a pan frame 12, a rear pipe 13 as a rear frame, and a front pipe 14 (see FIG. 6). The left and right cushion side frames 11 are members that constitute the left and right frames of the seat cushion S1, and are spaced apart while facing each other in the left-right direction. The cushion side frame 11 is made of sheet metal and formed in an elongated shape elongated in the front-rear direction.

The pan frame 12 is made of sheet metal and connects front portions of the left and right cushion side frames 11 to each other. As shown in FIG. 6, the rear pipe 13 and the front pipe 14 are made of metal pipe material, are spaced apart in the front-rear direction, and connect the left and right cushion side frames 11 . Specifically, the rear pipe 13 connects the rear portions of the left and right cushion side frames 11 to each other, and the front pipe 14 connects the front portions of the left and right cushion side frames 11 to each other. The front pipe 14 is arranged below the pan frame 12 .

A support member 30 is arranged between the left and right cushion side frames 11 . 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 plurality of resin members 32 that connect the wire members 31 . The wire member 31 is made of a metal wire and extends forward and backward while alternately bending left and right. The wire members 31 are arranged side by side on the left and right and are provided in a state of being bridged between the pan frame 12 and the rear pipe 13 . The resin member 32 is made of resin and formed integrally with the wire member 31 by insert molding so as to partially cover the entire circumference of the wire member 31 .

As shown in FIG. 3, the back frame F2 includes left and right sheet metal frames 22, a pipe frame 23, a lower frame 24 as a lower frame, and a bridge frame 25. As shown in FIG. The left and right sheet metal frames 22 are spaced apart while facing each other in the left-right direction. The sheet metal frame 22 is made of sheet metal, and is formed in a vertically elongated shape.

The pipe frame 23 is made of a metal pipe material, and has left and right upper side frames 23A that extend substantially vertically, and an upper frame 23B that connects the upper ends of the upper side frames 23A. The left and right upper side frames 23A are connected at their lower portions to the upper portions of the sheet metal frames 22, thereby forming, together with the left and right sheet metal frames 22, the left and right back side frames 21 that constitute the left and right frames of the seat back S2. there is The lower frame 24 is made of sheet metal and connects the lower portions of the left and right back side frames 21 to each other. The bridging frame 25 is made of sheet metal and connects the upper parts of the left and right back side frames 21 to each other.

The rear portion of the cushion side frame 11 and the lower portion of the back side frame 21 are rotatably connected via a reclining mechanism RL. Accordingly, in the vehicle seat S, the seat back S2 can be rotated forward and backward with respect to the seat cushion S1.

As shown in FIG. 2, the duct D is a member that connects the ventilation paths A1 and A2 formed in the pads P (P1 and P2) of the seat cushion S1 and seat back S2 and the blower device . Duct D is formed by connecting a plurality of parts. Specifically, as shown in FIG. 4, the duct D includes a first duct member 110 as a first component, a second duct member 120 as second and third components, and a fourth It has a third duct member 130 and a fourth duct member 140 as parts.

The first duct member 110 includes a lower pipe portion 111 extending substantially forward and backward, a curved pipe portion 112 extending upward while curving from the rear end of the lower pipe portion 111 so as to protrude rearward, and an upper end of the curved pipe portion 112 extending upward. and a first connecting pipe portion 113 extending substantially upward. The front end portion of the lower pipe portion 111 is connected to the blower device 70 (see FIG. 2).

The second duct member 120 is connected to the rear portion of the first duct member 110 and provided to extend substantially vertically. The second duct member 120 includes a second connection pipe portion 121 , a first bellows portion 122 as a flexible portion provided on the second connection pipe portion 121 , and a first bellows portion 122 provided on the first bellows portion 122 . 3 connecting tube portion 123 . The second connecting pipe portion 121 is formed in a size such that the first connecting pipe portion 113 of the first duct member 110 fits inside. The first bellows portion 122 is flexible and stretchable.

The third duct member 130 is connected to the upper end of the second duct member 120 . The third duct member 130 includes a fourth connection pipe portion 131 that extends substantially vertically, and a fourth connection pipe portion 131 that extends obliquely upward to the left (diagonally upward toward the center of the vehicle seat S in the left-right direction) from the upper end of the fourth connection pipe portion 131 . A first upper pipe portion 132, a second upper pipe portion 133 extending leftward (the center of the vehicle seat S in the left-right direction) from the upper end of the first upper pipe portion 132, and substantially forward from the second upper pipe portion 133. and an extending back connecting tube portion 134 . The fourth connecting pipe portion 131 is sized to fit inside the third connecting pipe portion 123 of the second duct member 120 . The back connecting tube portion 134 is connected at its front end to the air passage A2 formed in the back pad P2 (see FIG. 2).

The fourth duct member 140 is connected to the front portion of the first duct member 110 and provided to extend substantially vertically. The fourth duct member 140 includes a second bellows portion 141 , a cushion connection tube portion 142 provided above the second bellows portion 141 , and left and right connection wall portions 143 provided below the second bellows portion 141 . have. The second bellows portion 141 is flexible and stretchable. The cushion connection pipe portion 142 is connected to the air passage A1 formed in the cushion pad P1 (see FIG. 2). The connection wall portion 143 extends downward from the lower end of the second bellows portion 141 and is provided so as to sandwich the lower pipe portion 111 of the first duct member 110 from the left and right sides.

As shown in FIG. 5A, the first duct member 110 has a first engaging portion 151 and a second engaging portion 152 provided at the first connecting portion C1, and the second duct member 120 has a third engaging portion 153 and a fourth engaging portion 154 provided at the first connecting portion C1. The first connection portion C<b>1 is a connection portion between the first duct member 110 and the second duct member 120 . Specifically, the first connection portion C1 is a portion where the first connection pipe portion 113 of the first duct member 110 and the second connection pipe portion 121 of the second duct member 120 are connected and overlapped. The first connection portion C1 extends substantially vertically. In other words, the portion of the duct D that extends substantially vertically includes the first connection portion C1.

The first engaging portion 151 and the second engaging portion 152 are convex portions that protrude outward in the left-right direction from the left and right side surfaces of the first connecting pipe portion 113 . The third engaging portion 153 and the fourth engaging portion 154 are substantially rectangular holes penetrating to the left and right with which the engaging portions 151 and 152 as convex portions are engaged. is provided in The third engaging portion 153 engages with the first engaging portion 151 and the fourth engaging portion 154 engages with the second engaging portion 152 .

In addition, the third duct member 130 has a fifth engaging portion 161 and a sixth engaging portion 162 provided at the second connection portion C2, and the second duct member 120 is provided at the second connection portion C2. It has a seventh engaging portion 163 and an eighth engaging portion 164 provided. The second connecting portion C2 is a connecting portion between the second duct member 120 and the third duct member 130 . Specifically, the second connecting portion C2 is a portion where the third connecting pipe portion 123 of the second duct member 120 and the fourth connecting pipe portion 131 of the third duct member 130 are connected and overlapped. The second connection portion C2 extends substantially vertically. In other words, the portion of the duct D that extends substantially vertically includes the second connection portion C2.

The fifth engaging portion 161 and the sixth engaging portion 162 are convex portions that protrude outward in the left-right direction from the left and right side surfaces of the fourth connecting pipe portion 131 . The seventh engaging portion 163 and the eighth engaging portion 164 are substantially rectangular holes penetrating to the left and right with which the engaging portions 161 and 162 are engaged, and are provided in the left and right side walls of the third connecting pipe portion 123. there is The seventh engaging portion 163 engages with the fifth engaging portion 161 and the eighth engaging portion 164 engages with the sixth engaging portion 162 .

Further, as shown in FIG. 5B, the first duct member 110 has a ninth engaging portion 171 and a tenth engaging portion 172 provided on the lower tube portion 111, and the fourth duct member 140 has an eleventh engagement portion 173 and a twelfth engagement portion 174 provided on the connection wall portion 143 . The ninth engaging portion 171 and the tenth engaging portion 172 are convex portions that protrude outward in the left-right direction from the left and right side surfaces of the lower pipe portion 111 . The eleventh engaging portion 173 and the twelfth engaging portion 174 are substantially rectangular holes penetrating left and right with which the engaging portions 171 and 172 are engaged. The eleventh engaging portion 173 engages with the ninth engaging portion 171 , and the twelfth engaging portion 174 engages with the tenth engaging portion 172 . The first duct member 110 is provided with a fifth connection pipe portion 114 that branches off from the lower pipe portion 111 and extends substantially upward to fit inside the fourth duct member 140 .

The engaging portions 151, 152, 161, 162, 171, 172 are substantially triangular in cross-sectional view shown in FIG. Specifically, the engaging portions 151, 152, 161, 162, 171, 172 include contact surfaces 151A, 152A, 161A, 162A, 171A, 172A and inclined surfaces 151B, 152B, 161B, 162B, 171B, 172B. have. The contact surfaces 151A, 152A, 161A, 162A, 171A, 172A are flat surfaces that are substantially perpendicular to the direction in which the second duct member 120 or the fourth duct member 140 extends (vertical direction in FIG. 5). In addition, the inclined surfaces 151B, 152B, 161B, 162B, 171B, 172B extend from the laterally outer ends of the contact surfaces 151A, 152A, 161A, 162A, 171A, 172A to the corresponding connection pipe portions 113, 131, 114. The surface is inclined so as to approach the center of the duct D in the left-right direction toward the tip.

The first engaging portion 151 and the third engaging portion 153 are provided on the right side surface of the first connecting portion C1, and the second engaging portion 152 and the fourth engaging portion 154 are provided on the first connecting portion C1. Located on the left side. The fifth engaging portion 161 and the seventh engaging portion 163 are provided on the right side surface of the second connecting portion C2, and the sixth engaging portion 162 and the eighth engaging portion 164 are provided on the second connecting portion C2. It is provided on the left side of C2. The ninth engaging portion 171 is provided on the right side surface of the lower pipe portion 111 , and the tenth engaging portion 172 is provided on the left side surface of the lower pipe portion 111 . The eleventh engaging portion 173 is provided on the right connecting wall portion 143 , and the twelfth engaging portion 174 is provided on the left connecting wall portion 143 .

As shown in FIG. 2, the duct D is arranged across the seat cushion S1 and the seat back S2. Specifically, the duct D mainly includes the first duct member 110 and the fourth duct member 140 arranged on the seat cushion S1, the third duct member 130 arranged on the seat back S2, and the second duct member 120 mainly on the seat cushion. It is arranged so as to straddle S1 and seat back S2.

As shown in FIG. 6, in the duct D, the first duct member 110 is arranged below the support member 30 and to the right of the center (central plane CP) of the seat cushion S1 in the left-right direction. The front end of the first duct member 110 is connected to the blower device 70 arranged below the pan frame 12, and the lower pipe portion 111 extends substantially rearward. As shown in FIG. 7 , the curved tube portion 112 is curved in a substantially U shape that becomes convex later below the rear pipe 13 when viewed from the left-right direction. More specifically, the curved tube portion 112 is curved so as to pass through the rear end portion of the support member 30 below, behind, and above the support member 30 so as to avoid the rear end portion of the support member 30 . The first connecting pipe portion 113 extends substantially vertically through the front side of the rear pipe 13 toward the upper seat back S2.

Further, the duct D is arranged so that the second duct member 120 extends substantially vertically and straddles the cushion frame F1 and the back frame F2. As shown in FIG. 8, the duct D has a first upper pipe portion 132 and a second upper pipe portion 133 of the third duct member 130 connected to the upper end of the second duct member 120 extending toward the central plane CP. A back connecting pipe portion 134 extending substantially forward from the second upper pipe portion 133 is connected to an air passage A2 formed in the back pad P2 (see FIG. 2). Bent pipe portion 112, first connection portion C1 (first connection pipe portion 113 and second connection pipe portion 121), first bellows portion 122, second connection portion C2 (third connection pipe portion 123 and fourth connection pipe portion 131) is positioned closer to the right cushion side frame 11 than the central plane CP in the left-right direction.

As shown in FIG. 7, the duct D is arranged such that a portion extending substantially vertically extends from the seat cushion S1 to the seatback S2 through the front side of the rear pipe 13 and the lower frame 24. As shown in FIG. Specifically, the first connection portion C1 is arranged to pass through the front side of the rear pipe 13, and the second connection portion C2 and the first upper pipe portion 132 are arranged to pass through the front side of the lower frame 24. .

Further, the duct D is arranged so that the first connecting portion C1 overlaps the rear pipe 13 when viewed from the front-rear direction. Further, the duct D is arranged so that the second connecting portion C2 and the first upper pipe portion 132 overlap the lower frame 24 when viewed from the front-rear direction.

As shown in FIG. 4, the cross-sectional shape of the first connection portion C1, which is the portion of the duct D located on the front side of the rear pipe 13, is such that the dimension D11 in the front-rear direction is the dimension D12 in the left-right direction orthogonal to the front-rear direction. is smaller than In addition, the cross-sectional shape of the second connection portion C2, which is the portion of the duct D located on the front side of the lower frame 24, has a dimension D21 in the front-rear direction smaller than a dimension D22 in the left-right direction. That is, both the first connection portion C1 (the first connection pipe portion 113 and the second connection pipe portion 121) and the second connection portion C2 (the third connection pipe portion 123 and the fourth connection pipe portion 131) are flattened in the front-rear direction. cross-sectional shape.

Returning to FIG. 7 , the first bellows portion 122 is positioned above the rear pipe 13 . More specifically, the first bellows portion 122 is located substantially between the rear pipe 13 and the lower frame 24 . Specifically, the first bellows portion 122 is positioned between the rear pipe 13 and the lower frame 24 in the direction (see arrow) that connects the rear pipe 13 and the lower frame 24 at the shortest distance.

The skin U1 of the seat cushion S1 covering the cushion frame F1 and the cushion pad P1 is fixed to the rear pipe 13 by hooking the hook U11 provided at the end of the skin U1 to the rear pipe 13 constituting the cushion frame F1.

According to the present embodiment described above, the duct D is arranged so that the vicinity of the first connecting portion C1 passes through the front side of the rear pipe 13 and extends from the seat cushion S1 toward the seat back S2. can be protected later. As a result, it is possible to prevent the feet of the passengers in the rear seats from hitting the vicinity of the first connecting portion C1 of the duct D. Further, since the duct D does not pass through the rear pipe 13, the duct D does not become an obstacle when the hook U11 provided on the skin U1 of the seat cushion S1 is fixed to the rear pipe 13. Fixing work can be facilitated.

Further, since the duct D is arranged so that the vicinity of the second connection portion C2 passes through the front side of the lower frame 24 and is directed from the seat cushion S1 toward the seat back S2, the lower frame 24 connects the second connection portion C2 of the duct D to the second connection portion C2. The neighborhood can be protected later. As a result, it is possible to prevent the rear seat occupant's feet from hitting the vicinity of the second connecting portion C2.

In addition, since the first bellows portion 122 of the duct D is positioned above the rear pipe 13, even if the rear portion of the seat cushion S1 is hit by the leg of a rear seat passenger, the rear pipe 13 can receive it. As a result, the rear pipe 13 can prevent the feet of the passengers in the rear seats from coming into contact with the soft first bellows portion 122 of the duct D.

In addition, since the first bellows portion 122 of the duct D is positioned between the rear pipe 13 and the lower frame 24, even if the rear portion of the seat cushion S1 or the lower portion of the seat back S2 is hit by the foot of a passenger in the rear seat, the rear pipe 13 does not move. or the lower frame 24. As a result, the rear pipe 13 and the lower frame 24 can prevent the rear seat occupant's feet from hitting the first bellows portion 122 .

In addition, since the duct D is arranged so that the first connecting portion C1 overlaps with the rear pipe 13 when viewed from the front-rear direction, even if the rear portion of the seat cushion S1 is hit by the leg of a passenger in the rear seat, the rear pipe 13 receives the foot. be able to. As a result, the rear pipe 13 can prevent the feet of the passengers in the rear seats from hitting the connecting portion between the first duct member 110 and the second duct member 120 .

In addition, since the duct D is arranged so that the second connecting portion C2 overlaps the lower frame 24 when viewed in the front-rear direction, even if the lower portion of the seat back S2 is hit by the leg of a passenger in the rear seat, the lower frame 24 is can be accepted. As a result, the lower frame 24 can prevent the legs of the passengers in the rear seats from hitting the connecting portion between the second duct member 120 and the third duct member 130 .

In addition, since the cross-sectional shape of the first connection portion C1 positioned on the front side of the rear pipe 13 has a front-rear dimension D11 smaller than a left-right dimension D12, the first connection portion C1 can be made thinner in the front-rear direction. As a result, the duct D can be arranged compactly in the front-rear direction on the front side of the rear pipe 13, so that the vehicle seat S can be prevented from becoming large in the front-rear direction.

In addition, since the cross-sectional shape of the second connection portion C2 located on the front side of the lower frame 24 has a front-rear dimension D21 smaller than a left-right dimension D22, the second connection portion C2 can be made thinner in the front-rear direction. . As a result, the duct D can be arranged compactly in the front-rear direction on the front side of the lower frame 24, so that the vehicle seat S can be prevented from becoming large in the front-rear direction.

Further, since the duct D has the curved tube portion 112 curved in a U shape, the rigidity of the duct D can be improved. In addition, since the duct D is curved so as to avoid the rear end portion of the support member 30 at the curved pipe portion 112, interference between the duct D and the support member 30 arranged below the rear pipe 13 can be suppressed. can be done. In other words, since interference between the duct D and the support member 30 is suppressed by the curved tube portion 112, the front and rear dimensions of the support member 30 that receives the load from the occupant can be ensured. Therefore, the stability of the support of the vehicle seat S and the sitting comfort can be improved.

Further, since the first engaging portion 151 and the second engaging portion 152 are convex portions, and the third engaging portion 153 and the fourth engaging portion 154 are holes with which the convex portions are engaged, the first duct The member 110 and the second duct member 120 can be connected with a simple configuration. The same applies to the connection between the second duct member 120 and the third duct member 130 and the connection between the first duct member 110 and the fourth duct member 140 .

When an occupant sits on the seat cushion S1 and the weight of the cushion pad P1 and the support member 30 bends downward, the position of the first duct member 110 is lowered, and the first duct member 110 is connected to the second duct. A force may act to remove the member 120. In this case, the contact surfaces 151A and 152A of the engaging portions 151 and 152 are caught on the edges of the engaging portions 153 and 154, so that the first duct It is possible to prevent the member 110 from coming off the second duct member 120 .

Also, when the seat back S2 is rotated forward with respect to the seat cushion S1, the third duct member 130 rotates together with the seat back S2, so that the third duct member 130 can be pulled out of the second duct member 120. However, in this case, the contact surfaces 161A and 162A of the engaging portions 161 and 162 are caught on the edges of the engaging portions 163 and 164, so that the third duct member 130 becomes the third Detachment from the two-duct member 120 can be suppressed.

Next, a second embodiment will be described. In this embodiment, the right side corresponds to "one side in the left-right direction" and the left side corresponds to "the other side in the left-right direction". Further, in the following, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof is omitted as appropriate, and the points different from the first embodiment will be described in detail.
As shown in FIG. 9 , the back frame F<b>2 as a frame member includes a pipe frame 26 , sheet metal frames 27 and 28 , a bridge frame 25 and a wire frame 29 .

The pipe frame 26 is a frame formed by bending a metal pipe into a substantially rectangular shape and connecting the ends of the pipe at the bottom by welding. 26B and a lower frame 26C. The upper frame 26B and the lower frame 26C extend in the left-right direction and are spaced apart in the orthogonal direction, more specifically, in the vertical direction. The upper frame 26B connects the upper ends of the left and right side frames 26A, and the lower frame 26C connects the lower ends of the left and right side frames 26A.

The sheet metal frames 27 and 28 are made of sheet metal. The sheet metal frame 27 is formed in a vertically elongated shape and welded to the right portion of the pipe frame 26 . The right side frame 26A and the sheet metal frame 27 constitute the right back side frame 21. As shown in FIG. The sheet metal frame 28 is welded to the pipe frame 26 while holding the left lower end of the pipe frame 26 . The left side frame 26A and the sheet metal frame 28 constitute the left back side frame 21. As shown in FIG. The left and right back side frames 21 as a pair of side portions are spaced apart in the left-right direction.

The wire frame 29 is a frame formed by bending a metal wire (rod) into a substantially C shape, and is fixed to the back side frame 21 located on the left side. Specifically, the wire frame 29 has an upper end portion welded to the vicinity of the vertical central portion of the left side frame 26A, and a lower end portion welded to the lower end portion of the left side frame 26A.

As shown in FIG. 10(a), the duct D includes a first duct member 110 as a first tubular member, a second duct member 120 as a second tubular member, a third duct member 130, and a third tubular member. 4 duct members 140 are connected. In this embodiment, the first upper pipe portion 132A of the third duct member 130 extends substantially rearward from the upper end of the fourth connection pipe portion 131 . The second upper pipe portion 133A extends rightward (toward the center of the vehicle seat S in the left-right direction) from the rear end of the first upper pipe portion 132A and connects to the back connection pipe portion 134 .

As shown in FIG. 10(b), the first duct member 110 has a first engagement protrusion 155 provided on the first connection portion C1, and the second duct member 120 has a first connection portion C1. It has a first engaging recess 156 provided in C1. The first engagement projection 155 is a projection having a shape that protrudes from the outer peripheral surface of the first connection pipe portion 113 toward the outside of the first connection pipe portion 113 . placed around the perimeter. The first engaging recess 156 is a recess formed in the inner peripheral surface of the second connection pipe portion 121 and provided over the entire inner peripheral surface of the second connection pipe portion 121 . In the first duct member 110 and the second duct member 120, the first connecting pipe portion 113 is inserted inside the second connecting pipe portion 121 to engage the first engaging convex portion 155 and the first engaging concave portion 156. It is connected by letting

Further, as shown in FIG. 10(c), the second duct member 120 has a second engaging recess 166 provided in the second connecting portion C2, and the third duct member 130 has a second connecting portion C2. It has a second engaging projection 165 provided on the portion C2. The second engaging recess 166 is a recess formed in the inner peripheral surface of the third connecting pipe portion 123 and provided over the entire inner peripheral surface of the third connecting pipe portion 123 . The second engaging convex portion 165 is a convex portion that protrudes from the outer peripheral surface of the fourth connecting pipe portion 131 toward the outside of the fourth connecting pipe portion 131, and the entire outer peripheral surface of the fourth connecting pipe portion 131 is protruded. placed around the perimeter. The second duct member 120 and the third duct member 130 insert the fourth connecting pipe portion 131 inside the third connecting pipe portion 123 to engage the second engaging convex portion 165 and the second engaging concave portion 166. It is connected by letting

In addition, the engaging convex portion and the engaging concave portion are arranged on the inner peripheral surface of the pipe portion such as the second connecting pipe portion 121 and the third connecting pipe portion 123 arranged on the outside. The engaging recess is provided in a shape that protrudes toward the inner side of the tube, and the engaging recess is provided on the outer peripheral surface of the tube to be inserted inside, such as the first connection tube 113 and the fourth connection tube 131, in a shape that is recessed toward the inside of the tube. may be configured.

As shown in FIG. 11, the duct D has a lower pipe portion 111 located below the support member 30 and to the left of the central plane CP. The lower pipe portion 111 extends substantially forward and backward, and the front end thereof is connected to the blower device 70 . In the present embodiment, the support member 30 includes a plurality of, specifically, three wire members 31 arranged side by side. Each wire member 31 is provided in a state of being bridged between the pan frame 12 as a front frame and the rear pipe 13 . A portion of the duct D is located outside the outermost wire member 31 in the left-right direction. Specifically, the left portion of the rear end portion of the lower pipe portion 111 of the duct D is positioned outside the leftmost wire member 31 in the left-right direction.

As shown in FIG. 12, in the duct D, the curved tube portion 112, the first connection portion C1, the first bellows portion 122, the second connection portion C2, and the first upper tube portion 132A extend in the left-right direction of the seatback S2. It is arranged at a position closer to the left end than the center (central plane CP). In other words, the vertically extending portion of the duct D is arranged at a position closer to the left end than the central plane CP in the left-right direction of the seatback S2.

As shown in FIG. 13, the vertically extending portion of the duct D is arranged to pass from the seat cushion S1 to the seat back S2 through the rear pipe 13 and the front side of the lower frame 26C. Specifically, the vertically extending portion of the duct D includes a curved tube portion 112, a first connecting portion C1, a first bellows portion 122, and a second connecting portion C2. The duct D is arranged such that the upper end portion of the curved tube portion 112 and the first connection portion C1 pass through the front side of the rear pipe 13, and the upper end portion of the first bellows portion 122 and the second connection portion C2 are connected to the lower frame 26C. It is arranged to pass through the front side. More specifically, the upper end portion of the curved tube portion 112 and the first connection portion C1 are arranged between the rear pipe 13 and the cushion pad P1 in the front-rear direction, and the upper end portion of the first bellows portion 122 and the second connection portion are disposed between the rear pipe 13 and the cushion pad P1. C2 is arranged between the lower frame 26C and the back pad P2 in the front-rear direction.

The seat back S2 is configured to be rotatable (reclinable) back and forth with respect to the seat cushion S1. In this state, it is curved in an arc shape that is convex backward as a whole. More specifically, in this embodiment, when the first bellows portion 122 is seated, the upper end of the first bellows portion 122 is curved in an arcuate shape (see the upper arrow) that protrudes forward, and the portion below the upper end is curved rearwardly. It is curved in a substantially S-shape by being curved in an arcuate shape (see the arrow on the lower side) that is convex. A portion of the first bellows portion 122, specifically, a lower end thereof, is positioned between the cushion pad P1 and the back pad P2.

In this embodiment, the vehicle seat S includes a cover member DC.
The cover member DC is made of the same cloth or leather as the skins U1 and U2, and has flexibility. For example, as shown in FIG. 10, the cover member DC is attached to the duct D by stitching the opposite ends of a sheet-like member having a substantially C-shaped cross section to form a tubular shape and covering the duct D. Returning to FIG. 13, the cover member DC is attached so as to mainly cover the first bellows portion 122 and the second connection portion C2. By covering the first bellows portion 122 with the cover member DC, the cover member DC covers a portion of the duct D that straddles the seat cushion S1 and the seat back S2.

Further, the duct D is arranged with the first connecting portion C<b>1 as an overlapping portion in contact with the rear pipe 13 . The first connection portion C1 is a portion where the first connection pipe portion 113 of the first duct member 110 is inserted into and overlaps with the second connection pipe portion 121 of the second duct member 120 . The duct D contacts the rear pipe 13 at a portion of the first connecting portion C1 below the portion where the first engaging projection 155 and the first engaging recess 156 are provided. 13, the second connection pipe portion 121 of the second duct member 120 is inserted inside the first connection pipe portion 113 of the first duct member 110. It may be a configuration in which they are overlapped. The same applies to the second connecting portion C2.

As shown in FIGS. 14 and 15, a cushion pad P1 and a back pad P2 as pad members have notches 65 and 75 as recesses in which ducts D are arranged, respectively.

More specifically, as shown in FIG. 14, the cushion pad P1 has a cushion pad central portion PC1 and left and right cushion pad side portions PS1 projecting above the cushion pad central portion PC1. The notch 65 has a shape in which the left side of the rear end portion of the cushion pad central portion PC1 is cut away, and the rear, left, upper and lower portions are opened. In the notch 65, mainly the first connection portion C1, which is a portion of the duct D that extends vertically, and the upper portion of the curved tube portion 112 (see FIG. 13) are arranged.

Further, as shown in FIG. 15, the back pad P2 has a back pad central portion PC2 and left and right back pad side portions PS2 projecting forward from the back pad central portion PC2. The notch 75 has a shape in which the left side of the lower end portion of the back pad central portion PC2 is notched, and the bottom and front and rear are open. As shown in FIG. 13, the notch 75 mainly includes the upper portion of the first bellows portion 122, which is the portion of the duct D that extends vertically, and the second connection portion C2.

As shown in FIG. 14, the cushion pad P1 has, on its upper surface, a hanging groove G1 for hanging the skin U1 (see FIG. 13) of the seat cushion S1. The hanging groove G1 includes a pair of left and right first hanging grooves G11 extending in the front-rear direction, a second hanging groove G12 connecting the rear ends of the pair of first hanging grooves G11, and a second hanging groove G12. It has a third hanging groove G13 that connects the pair of first hanging grooves G11 at the front. The first hanging grooves G11 are formed at the boundaries between the cushion pad center portion PC1 and the left and right cushion pad side portions PS1. A portion of the duct D is located outside the pair of left and right first hanging grooves G11 in the left-right direction. Specifically, in the duct D, the left portion of the rear end portion of the lower pipe portion 111 is positioned further in the left-right direction than one of the first hanging grooves G11, specifically, the first hanging groove G11 located on the left side. located outside.

As shown in FIG. 9, the skin U2 as the skin member is formed in a substantially bag-like shape with an open bottom, and covers the back frame F2 and the back pad P2 by covering the back frame F2 and the back pad P2 from above. . The skin U2 is arranged so as to surround the upper frame 26B and the lower frame 26C of the pipe frame 26 when viewed from the left-right direction. As shown in FIG. 13, the skin U2 has a skin body 510, a first end 520, and a second end 530 when viewed in the left-right direction.

The skin main body 510 is the main body portion of the skin U2 except for the first end portion 520 and the second end portion 530, and mainly covers the front side, the upper side, and the left and right sides of the back frame F2 and the back pad P2.

The first end portion 520 is one end portion of the outer skin U2 as viewed in the left-right direction. The first end portion 520 extends from the front side of the seat back S2, which is the occupant side, toward the rear side, which is the side opposite to the occupant side of the seat back S2, passing under the back pad P2 when viewed in the left-right direction. It extends and is fastened to the engaged member 570 of the second end 530 on the rear side of the seat back S2.

The second end 530 is an end opposite to the first end 520 when viewed in the left-right direction. The second end portion 530 extends downward from the upper side on the rear side of the seat back S2 and covers the rear sides of the back frame F2 and the back pad P2.

As shown in FIG. 16, the first end portion 520 includes a first tongue portion 521, a second tongue portion 522, a third tongue portion 523, a first engaging member 540 as an engaging member, and a second tongue portion 520. It has a second engaging member 550 as an engaging portion and a third engaging member 560 .
The first tongue portion 521 is a portion extending from the lower end of the outer skin main body 510 toward the rear side from the front side through the right side of the portion of the duct D extending vertically. The free end portion 521A of the first tongue portion 521 extends to substantially the same position as the left edge of the second tongue portion 522 in the left-right direction so that the left end portion of the free end portion 521A intersects the second tongue portion 522. . Therefore, the first tongue portion 521 is substantially L-shaped.

The second tongue portion 522 is a strip-shaped portion extending from the lower end of the outer skin body 510 to the rear side from the front side through the left side of the portion of the duct D extending vertically. The skin U2 has an opening formed by the lower edge of the skin main body 510, the left edge of the first tongue portion 521, and the right edge of the second tongue portion 522 for passing the vertically extending portion of the duct D. A portion 511 is formed.
The third tongue portion 523 is provided so as to extend laterally outward and obliquely upward in the posture shown in FIG. 16 from the left end of the free end portion 521A of the first tongue portion 521 .

The first engaging member 540 is made of resin and provided on the first tongue portion 521 . Specifically, the first engaging member 540 is sewn or adhered to the front surface of the free end portion 521A of the first tongue portion 521 in the posture shown in FIG. 521 attached. The first engaging member 540 has a first engaging portion 541 and a plate-like portion 542 . The first engaging portion 541 is a portion that engages with the engaged member 570 of the second end portion 530 and is formed in a hook shape that is long in the left and right direction. The plate-like portion 542 is a flat plate-like portion and extends leftward from the left end of the first engaging portion 541 .

The second engaging member 550 is made of resin and provided on the second tongue portion 522 . Specifically, the second engaging member 550 is sewn or adhered to the upper surface of the free end of the second tongue 522 in the posture shown in FIG. attached to the The second engaging member 550 is a portion that engages with the engaged member 570 of the second end portion 530 and is formed in a hook shape. The surface of the second tongue portion 522 to which the second engaging member 550 is attached and the surface of the first tongue portion 521 to which the first engaging member 540 is attached are the surfaces of the first end portion 520 (skin U2) on the same side. is.

The third engaging member 560 is made of resin and provided on the third tongue portion 523 . Specifically, the third engaging member 560 is sewn or adhered to the front surface of the upper and left end portions of the third tongue portion 523 in the posture shown in FIG. It is attached to the portion 523 . The third engaging member 560 is formed in a hook shape. The surface of the third tongue portion 523 to which the third engaging member 560 is attached and the surface of the first tongue portion 521 to which the first engaging member 540 is attached are the surfaces on the same side of the first end portion 520 (outer skin U2). is.

The second end portion 530 has an engaged member 570 as an engaged portion. The engaged member 570 is a flat plate-shaped member made of resin and provided at the second end portion 530 . Specifically, the engaged member 570 is sewn or adhered to the front side surface of the free end portion 531 of the second end portion 530 in the posture shown in FIG. attached to the The engaged member 570 is a member harder than the skin U2.

Next, a method for manufacturing the vehicle seat S, more specifically, a method for attaching the upholstery U2 will be described. When attaching the skin U2, the duct D is attached first before attaching the skin U2.
When attaching the skin U2, first, as shown in FIG. 9, the back pad P2 covering the back frame F2 is covered with the skin U2. Next, the first end 520 is placed on the back side of the back pad P2 through the bottom side of the back pad P2. Specifically, as shown in FIG. 16, the first tongue portion 521 and the third tongue portion 523 are arranged on the rear side of the back pad P2 through the right side of the vertically extending portion of the duct D, and the second tongue portion 522 is It is arranged on the rear side of the back pad P2 through the left side of the vertically extending portion of the duct D.

Next, the second engaging member 550 provided on the second tongue portion 522 is engaged with the left end portion of the first tongue portion 521 as shown in FIG. Specifically, the second tongue portion 522 (see FIG. 16) is passed through the front side of the left end portion of the free end portion 521A of the first tongue portion 521, and the second engaging member 550 is inserted into the left end portion of the free end portion 521A. to engage. As a result, the hook-shaped second engaging member 550 holds the left end of the free end 521A and the plate-like portion 542 of the first engaging member 540 between the first tongue 521 and the plate. Both of the prongs 542 are engaged.

The first end 520 is then clipped to the second end 530 . Specifically, as shown in FIGS. 18A and 18B, the free end portion 531 of the second end portion 530 is folded forward to connect the engaged member 570 and the free end portion 531 to the first engaging member. It is inserted into the hook-shaped first engaging portion 541 of 540 and into the hook-shaped second engaging member 550 .

As a result, as shown in FIG. 18A, the first engaging portion 541 sandwiches the first tongue portion 521, the free end portion 531 of the second end portion 530, and the engaged member 570. , the first tongue 521 of the first end 520 is clipped to the second end 530 . Further, as shown in FIG. 18B, the second engaging member 550 includes a second tongue portion 522, a plate-like portion 542 of the first engaging member 540, a first tongue portion 521, and a second end. The second tongue portion 522 of the first end portion 520 is fastened to the second end portion 530 with the free end portion 531 of the portion 530 and the engaged member 570 sandwiched therebetween.

Next, as shown in FIG. 19, the third tongue portion 523 is attached to the wire frame 29 of the back frame F2. Specifically, the third tongue portion 523 is arranged laterally outward from the rear side along the lower portion of the left back side frame 21 , and the third engaging member 560 is positioned approximately below the wire frame 29 from the laterally outer side. Hook it on the part that extends back and forth. Thereby, the third tongue portion 523 is fastened to the wire frame 29, and the skin U2 is fastened to the back frame F2.

According to the present embodiment described above, the same effects as those of the first embodiment can be obtained.
Further, since the cushion pad P1 and the back pad P2 have the cutouts 65 and 75 in which the vertically extending portions of the duct D are arranged, interference between the duct D and the cushion pad P1 and the back pad P2 can be suppressed. . As a result, it is possible to prevent unnecessary force from acting on the duct D from the cushion pad P1 and the back pad P2. Further, since the duct D can be arranged compactly, it is possible to suppress the vehicle seat S from becoming large.

Further, since the vertically extending portion of the duct D (the upper end portion of the curved tube portion 112 and the first connection portion C1) is arranged between the rear pipe 13 and the cushion pad P1 in the front-rear direction, the rear pipe 13 and the cushion pad P1 The duct D can be restrained from moving back and forth. Further, since the vertically extending portion of the duct D (the upper end portion of the first bellows portion 122 and the second connecting portion C2) is disposed between the lower frame 26C and the back pad P2 in the front-rear direction, the lower frame 26C and the back pad P2 are arranged. The pad P2 can restrain the duct D from moving back and forth.

Further, the seat back S2 is configured to be reclinable with respect to the seat cushion S1, and the vertically extending portion of the duct D has a first bellows portion 122, and a part of the first bellows portion 122 is made up of the cushion pad P1 and the back pad. Since it is positioned between P2, the duct D can follow the reclining motion of the seat back S2.

In addition, since the first bellows portion 122 is curved in an arc shape that protrudes rearward in the seated state, the duct D can follow the reclining motion of the seatback S2 satisfactorily.

Further, since a part of the duct D is located outside the pair of first hanging grooves G11 in the left-right direction, the cushion pad P1 may be bent downward due to the load when the occupant sits down. Even if there is, an unnecessary force acting on the duct D can be suppressed.

In addition, since a portion of the duct D is located outside the outermost wire member 31 in the left-right direction, the wire member 31 (support member 30) is directed downward by the load when the occupant sits down. Even if the duct D is bent by force, application of unnecessary force to the duct D can be suppressed.

The duct D has a first connection portion C1 in contact with the rear pipe 13, and the first connection portion C1 is a second connection between the first connection pipe portion 113 of the first duct member 110 and the second duct member 120. Since the rigidity is high due to the overlap with the pipe portion 121, the rigidity of the portion of the duct D that contacts the rear pipe 13 can be increased. Accordingly, deformation of the duct D can be suppressed with a configuration in which a portion of the duct D is arranged in contact with the rear pipe 13 (seat frame F).

Further, since the seat back S2 is configured to be reclinable with respect to the seat cushion S1, and the vehicle seat S includes the cover member DC that covers the portion of the duct D straddling the seat cushion S1 and the seat back S2, the duct D is covered with a cover member DC and is not directly exposed between the seat cushion S1 and the seat back S2. As a result, the appearance of the vehicle seat S having the duct D can be improved.

Further, since the first end portion 520 of the skin U2 has the first tongue portion 521, the second tongue portion 522, the first engaging member 540, and the second engaging member 550, the duct D and the skin U2 The first end portion 520 of the outer skin U2 can be fastened to the engaged member 570 while suppressing interference with the outer skin U2.

Also, since the first engaging member 540 has the plate-like portion 542 with which the second engaging member 550 engages, the second engaging member 550 engages both the first tongue portion 521 and the plate-like portion 542 . can be made As a result, the first tongue portion 521 and the second tongue portion 522 can be firmly fastened, so that the first end portion 520 can be firmly fastened to the engaged member 570 .

Further, since the engaged member 570 is provided at the second end portion 530, the first end portion 520 and the second end portion 530, that is, the ends of the outer skin U2 can be fastened to each other. Accordingly, for example, since it is not necessary to provide a portion for fastening the first end portion 520 and a portion for fastening the second end portion 530 to the back frame F2, the configuration of the back frame F2 and the like can be simplified.

Further, since the skin U2 has the third tongue portion 523 that is fastened to the wire frame 29 of the back frame F2, the skin U2 can be fastened to the back frame F2. Thereby, the skin U2 can be firmly attached.

Although the embodiment has been described above, the present invention is not limited to the embodiment. The specific configuration can be changed as appropriate without departing from the spirit of the invention as described below.

For example, in the modified example shown in FIG. 20, the seat back S2 (back pad P2) has a first ventilation path A21 formed in the lower part and an upper part of the first ventilation path A21 independently of the first ventilation path A21. It has a second air passage A22 formed (not connected to the first air passage A21). Further, the duct D includes a third duct member 130 as a first duct portion connected to the first air passage A21, and a second duct portion branched from the third duct member 130 and connected to the second air passage A22. It has a fifth duct member 180 as.

The third duct member 130 further has a branch pipe portion 135 extending substantially upward from the upper end of the fourth connection pipe portion 131 . The first back connecting pipe portion 134 is connected at its front end to the first air passage A21 formed under the back pad P2.

The fifth duct member 180 includes a third upper pipe portion 181 extending substantially vertically, a fourth upper pipe portion 182 extending obliquely upward to the left from the upper end of the third upper pipe portion 181, and a and a second back connecting pipe portion 183 extending substantially forward. The third upper pipe portion 181 is sized so that the upper end of the branch pipe portion 135 of the third duct member 130 fits inside, and the lower end thereof is connected to the branch pipe portion 135 of the third duct member 130 . . The second back connecting tube portion 183 is connected at its front end to the second air passage A22 of the back pad P2, which is formed on the first air passage A21.

With such a configuration, the air blower 70 can be connected to the plurality of air passages A21 and A22 by the duct D, so that a configuration can be realized in which air is blown over a wide area of the seat surface of the seat back S2.

20 may be applied to the seat cushion S1 together with the seat back S2 or instead of the seat back S2. That is, the seat cushion S1 has a first ventilation path and a second ventilation path. For example, the duct D is branched under the seat cushion S1 and individually connected to the first ventilation path and the second ventilation path. You may do so. According to this, it is possible to achieve a configuration in which air is blown out over a wide range of the seating surface of the seat cushion S1.

Further, the duct D may be configured to have a symmetrical shape with respect to the configuration described in the above embodiment. Also, the duct D may be configured without a curved portion (the curved tube portion 112), for example. In the above-described embodiment, the duct D has the first bellows portion 122 as the flexible portion, but the invention is not limited to this, and the configuration of the flexible portion is not particularly limited as long as it has flexibility. do not have. Moreover, in the above-described embodiment, the duct D is formed by connecting a plurality of parts, but is not limited to this, and may be formed by a single part.

Further, in the first embodiment, the first engaging portion 151 and the second engaging portion 152 are convex portions protruding outward, and the third engaging portion 153 and the fourth engaging portion 154 are convex portions. was the hole to engage with, but is not limited to this. For example, the first engaging portion and the second engaging portion may be convex portions protruding inward. Further, the third engaging portion and the fourth engaging portion may be convex portions, and the first engaging portion and the second engaging portion may be holes. Also, the hole may be a bottomed hole (recess) instead of a through hole. Also, the first engaging portion and the second engaging portion may have different structures, for example, one may be a protrusion and the other may be a hole. The same applies to the third engaging portion and the fourth engaging portion. Moreover, the same can be said for the other engaging portions (161 to 164, 171 to 174). Further, the duct may have a configuration in which the connecting portion is not provided with the engaging portion.

In the above-described embodiment, the rear pipe 13 made of a pipe material is used as the rear frame, but the rear frame is not limited to this. For example, the rear frame may be a plate-shaped frame made of sheet metal. In addition, in the first embodiment, the plate-shaped lower frame 24 made of sheet metal was exemplified as the lower frame.

Further, in the above-described embodiment, the vertically extending portion of the duct D is arranged at a position closer to the right or left end than the center in the left-right direction of the seatback S2, but the present invention is not limited to this. For example, as shown in FIG. 21, the vertically extending portion of the duct D may be arranged at a position closer to the center (central plane CP) than the ends in the left-right direction of the seatback S2. Specifically, the duct D has a lower pipe portion 110A that extends back and forth under the seat cushion S1, and a front end portion of which is connected to an air blower (not shown), and a rear pipe portion 120A that extends substantially upward from the rear end of the lower pipe portion 110A. and a back connecting pipe portion 130A extending forward from the upper end of the rear pipe portion 120A and connected to the back pad P2. In the duct D, the lower pipe portion 110A, the rear pipe portion 120A extending vertically, and the back connection pipe portion 130A are positioned closer to the center plane CP than the ends in the left-right direction of the seat back S2. are arranged at positions overlapping with the central plane CP. With such a configuration, the length of the duct D can be shortened.

In the modified example shown in FIG. 21, the rear tube portion 120A is arranged so as to pass from the seat cushion S1 to the seatback S2 through the front side of the rear pipe 13 of the cushion frame F1 and the lower frame 26C of the back frame F2. The cushion pad P1 has a notch 66 in which the rear tube portion 120A is arranged in the center portion in the left-right direction of the rear end portion. Further, the back pad P2 has a notch 76 in which the rear tube portion 120A is arranged in the center portion in the left-right direction of the lower end portion. The cutouts 66 and 76 have an open top, bottom, and rear.

In the above-described embodiment, a portion of the lower pipe portion 111 of the duct D is positioned outside the outermost wire member 31 in the left-right direction. The entire duct may be positioned outside the outermost wire member. Alternatively, the entire duct may be positioned between the two outermost wire members.

Further, in the above-described embodiment, a portion of the lower pipe portion 111 of the duct D is positioned outside the pair of first hanging grooves G11 in the left-right direction. may be located outside the pair of hanging grooves extending in the front-rear direction. Alternatively, the entire duct may be positioned between a pair of hanging grooves extending back and forth.

Further, in the above-described embodiment, the lower end portion (a part of the flexible portion) of the first bellows portion 122 is positioned between the cushion pad P1 and the back pad P2. The whole may be located between the cushion pad and the back pad. In addition, as long as the seat back does not recline with respect to the seat cushion, the portion other than the flexible portion may be positioned between the cushion pad and the back pad. Also, the duct may be configured without a flexible portion.

Further, in the above-described embodiment, the first connecting portion C1 (overlapping portion) of the duct D is arranged in contact with the rear pipe 13 of the back frame F2, but the present invention is not limited to this. For example, the duct may be arranged in a state where the portion other than the overlapping portion is in contact with the frame, as long as the duct is hard and hard to deform as a whole. Also, the duct may be spaced apart from the frame so as not to contact the frame.

Further, in the second embodiment, the first engaging member 540 (engaging member) has the first engaging portion 541 and the plate-like portion 542 , and the plate-like portion 542 engages the second engaging member 550 . Although the configuration is such that it fits together, it is not limited to this, and for example, the engagement member may be configured without the plate-like portion. In other words, in the second embodiment, the second engaging member 550 (second engaging portion) is configured to engage with both the first tongue portion 521 and the plate-like portion 542. The configuration may be such that the portion engages only the first tongue.

In the second embodiment, the skin U2 (skin member) has the third tongue portion 523 that is fastened to the wire frame 29 and is fastened to the back frame F2 (frame member). Not limited. For example, the skin member may be configured without the third tongue. That is, a configuration in which the skin member is not fastened to the frame member may be employed. Moreover, if the wire frame is used only for fastening the skin member, the frame member may be configured without the wire frame.

Also, the configuration of the first end of the skin member and the configuration of fastening the skin member to the wire frame of the frame member described in the second embodiment may be applied to the seat cushion instead of the seat back. In this case, the cushion frame corresponds to the "frame member", and the first end extends from the upper side of the seat cushion, which is the occupant side, toward the lower side, which is the side opposite to the occupant side of the seat cushion. It extends through the rear side of the pad and is clipped to the engaged portion on the underside of the seat cushion. In other words, the first tongue extends from the top to the bottom through one side of the duct in the left-right direction, and the second tongue extends from the top to the bottom through the other side of the duct in the left-right direction. Extend.

Further, in the second embodiment, the engaged member 570 (engaged portion) to which the first end portion 520 is fastened is provided at the second end portion 530, but this is not a limitation. The engaging portion may be provided on a frame member or the like. In other words, the first end of the skin member may be configured to be fastened to a frame member or the like instead of being configured to be fastened to the second end.

In the second embodiment, the cover member DC is a soft member made of the same fabric or leather as the skins U1 and U2. The cover member may be a member harder than the skin. Further, the vehicle seat may be configured without the cover member.

In addition, in the second embodiment, the notches 65 and 75 are illustrated as recesses in which the vertically extending portions of the duct are arranged, but the present invention is not limited to this. For example, in the second embodiment, as shown in FIG. 14, the recess (notch 65) of the cushion pad P1 has a shape in which the rear, left and top and bottom are open, but only the left and top and bottom are open. It may be a shape that has been That is, the recessed portion of the cushion pad P1 may have a shape that is open only in one direction when viewed from above and below. Further, in the second embodiment, as shown in FIG. 15, the concave portion (notch 75) of the back pad P2 has a shape in which the bottom and front and back are open, but only the bottom and rear are open. It may be in shape. That is, the concave portion of the back pad P2 may have a shape in which the front side is closed.

Further, in the above-described embodiment, the sirocco fan was exemplified as the air blower 70, but the present invention is not limited to this, and may be a propeller fan, a turbo fan, or the like. Further, in the above-described embodiment, the vehicle seat S is configured to blow air from the ventilation holes H1 and H2, but is not limited to this. good. By applying the configuration shown in FIG. 20 for sucking air through the ventilation holes, it is possible to realize a configuration for sucking air over a wide range of the seating surface of the seat back and seat cushion.

Further, the blower may switch between blowing and sucking by, for example, switching the rotation direction of the impeller. Further, in the above-described embodiment, the vehicle seat S includes the air blower 70, but the vehicle seat itself may be configured without the air blower. In other words, the blower device may be provided in 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-described embodiment, the air passage connected to the blower device by the duct D is formed in both the seat cushion and the seat back. It may be a configuration formed in

In the above-described embodiment, the vehicle seat S mounted in an automobile was exemplified as a vehicle seat. may be

Also, the elements described in the above-described embodiment and modification may be arbitrarily combined and implemented.

Reference Signs List 11 cushion side frame 13 rear pipe 21 back side frame 24 lower frame 65, 75 notch 70 blower 110 first duct member 112 curved tube portion 120 second duct member 122 first bellows portion 130 third duct member 520 first end portion 521 First tongue portion 522 Second tongue portion 541 First engaging portion 550 Second engaging member 570 Engaged member A1 Air passage A2 Air passage C1 First connecting portion C2 Second connecting portion D Duct DC Cover member P1 Cushion pad P2 Back pad S Vehicle seat S1 Seat cushion S2 Seat back U2 Outer skin

Claims (13)

A vehicle seat comprising a seat cushion and a seat back,
left and right cushion side frames forming left and right frames of the seat cushion;
a rear frame connecting rear portions of the left and right cushion side frames;
a duct disposed across the seat cushion and the seat back and connecting an air passage formed in at least one of the seat cushion and the seat back to a blower device;
the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the rear frame ;
The vertically extending portion of the duct connects the first part and the second part, and the connection part between the first part and the second part is connected to the rear frame when viewed from the front-rear direction. A vehicle seat characterized by overlapping . A vehicle seat comprising a seat cushion and a seat back,
left and right cushion side frames forming left and right frames of the seat cushion;
a rear frame connecting rear portions of the left and right cushion side frames;
a duct disposed across the seat cushion and the seat back and connecting an air passage formed in at least one of the seat cushion and the seat back to a blower device;
the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the rear frame ;
A vehicle seat according to claim 1, wherein the duct is curved in a U-shape that protrudes backward below the rear frame when viewed from the left-right direction . A vehicle seat comprising a seat cushion and a seat back,
a cushion pad covering the frame of the seat cushion;
a back pad covering the frame of the seat back;
left and right cushion side frames forming left and right frames of the seat cushion;
a rear frame connecting rear portions of the left and right cushion side frames;
a duct disposed across the seat cushion and the seat back and connecting an air passage formed in at least one of the seat cushion and the seat back to a blower device;
the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the rear frame ;
The seat back is configured to be reclinable with respect to the seat cushion ,
The vertically extending portion of the duct has a flexible portion,
The flexible portion is
at least a portion of which is located between the cushion pad and the back pad;
1. A vehicle seat, wherein said seat back is curved in an arc shape projecting rearward in a seated state in which said seat back stands up against said seat cushion . A vehicle seat comprising a seat cushion and a seat back,
a frame member forming a frame of the seat cushion or the seat back;
a pad member covering the frame member;
a skin member covering the pad member;
left and right cushion side frames forming left and right frames of the seat cushion;
a rear frame connecting rear portions of the left and right cushion side frames;
a duct disposed across the seat cushion and the seat back and connecting an air passage formed in at least one of the seat cushion and the seat back to a blower device;
the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the rear frame ;
The skin member extends from the occupant side of the seat cushion or the seat back toward the side opposite to the occupant side when viewed in the left-right direction, and covers the seat cushion or the seat back on the side opposite to the occupant side. having a first end that is clipped to the engagement portion;
The first end is
a first tongue portion extending from the occupant side of the seat cushion or the seat back toward the side opposite to the occupant side through one side in the left-right direction of the duct;
a second tongue extending from the occupant side of the seat cushion or the seat back toward the side opposite to the occupant side through the other side of the duct in the left-right direction;
a first engaging portion provided on the first tongue portion and engaged with the engaged portion;
A vehicle seat, comprising: a second engaging portion that is provided on the second tongue portion and engages the other end portion in the left-right direction of the first tongue portion and the engaged portion. left and right back side frames forming left and right frames of the seat back;
a lower frame that connects the lower parts of the left and right back side frames,
5. The duct according to any one of claims 1 to 4, wherein the vertically extending portion is arranged so as to pass through the front side of the lower frame and extend from the seat cushion toward the seat back. Vehicle seat as described. A vehicle seat comprising a seat cushion and a seat back,
left and right cushion side frames forming left and right frames of the seat cushion;
a rear frame connecting rear portions of the left and right cushion side frames;
left and right back side frames forming left and right frames of the seat back;
a lower frame connecting lower portions of the left and right back side frames;
a duct disposed across the seat cushion and the seat back and connecting an air passage formed in at least one of the seat cushion and the seat back to a blower device;
the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the rear frame ;
the duct is arranged such that a portion extending vertically extends from the seat cushion toward the seat back through the front side of the lower frame;
The vertically extending portion of the duct connects the third part and the fourth part, and the connecting part between the third part and the fourth part is connected to the lower frame when viewed from the front-rear direction. A vehicle seat characterized by overlapping . The duct has a flexible portion having flexibility,
7. A vehicle seat according to any one of claims 1 to 6, wherein the flexible portion is positioned above the rear frame. The duct has a flexible portion having flexibility,
7. The vehicle seat according to claim 5, wherein the flexible portion is positioned between the rear frame and the lower frame in a direction connecting the rear frame and the lower frame at the shortest distance. . The cross-sectional shape of the portion of the duct located on the front side of the rear frame is characterized in that the dimension in the front-rear direction is smaller than the dimension in the direction orthogonal to the front-rear direction. A vehicle seat according to any one of the preceding items. 5 , 6, and 6 , wherein the cross-sectional shape of the flow path of the portion of the duct located on the front side of the lower frame is smaller in the front-rear direction than in the direction perpendicular to the front-rear direction. A vehicle seat according to claim 8 . one of the seat cushion and the seat back has a first air passage and a second air passage;
The duct has a first duct portion connected to the first air passage, and a second duct portion branching from the first duct portion and extending and connected to the second air passage. A vehicle seat according to any one of claims 1 to 10 . A pad member covering the frame of the seat cushion or the seat back,
The vehicle seat according to any one of claims 1 to 11 , wherein the pad member has a recess in which the vertically extending portion of the duct is arranged. The seat back is configured to be reclinable with respect to the seat cushion,
13. The vehicle seat according to any one of claims 1 to 12, further comprising a cover member that covers a portion of the duct extending over the seat cushion and the seat back.

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