Vehicle seat

Abstract

[Problem] To provide a vehicle seat capable of achieving, without using a plurality of air blowing devices, circulation of air between a seated person and a seating surface and blowing air to an occupant seated on a rear seat. [Solution] A vehicle seat 1 comprises: a seat body 3 including a seat back 7 and a seat cushion 6; and an air blowing unit 61 provided in the seat body. A ventilation passage 31 for blowing air to a seated person is formed inside the seat cushion, and an air supply port 68 opening rearward is provided on a rear surface of the seat back. The air blowing unit is provided with: an air blowing device 62 including one intake port 66 and two discharge ports 67, 67A and 67B; a first duct 63 connecting one of the discharge ports and the ventilation passage; and a second duct 64 connecting the other of the discharge ports and the air supply port.

Description

Vehicle seat

[0001] The present invention relates to a vehicle seat.

[0002] Patent Document 1 discloses a vehicle seat in which an air conditioning device for a rear seat is incorporated in a seat back. This air conditioning device has a blower device including an intake duct and a blow duct, and when the blower device is driven, air is taken in from the intake duct and delivered to the blow duct.

[0003] The vehicle seat includes a back frame that forms the skeleton of the seat back and to which the blower device is attached, and a plate-shaped seat back board disposed behind the blower device. The seat back board is provided with an intake port connected to the intake duct and a blow port connected to the blow duct. By driving the blower device, air is taken in from the back side of the vehicle seat through the intake port, and is delivered toward the occupant seated in the rear seat through the blow port.

[0004] Japanese Unexamined Patent Application Publication No. 2015-214289

[0005] A vehicle seat mounted on various vehicles such as automobiles may be provided with an air ventilation system (AVS). This air ventilation system includes a blower device for circulating air, and by driving the blower device, the air staying between the occupant and the seat surface is circulated, thereby improving the comfort of the vehicle seat.

[0006] Accordingly, it is conceivable to provide a vehicle seat with a blower device for blowing air toward the occupant in the rear seat and a blower device for circulating the air staying between the occupant and the seating surface. However, providing a blower device for each application in this manner causes problems of increasing the weight of the vehicle seat and increasing manufacturing costs.

[0007] In view of the above background, an object of the present invention is to provide a vehicle seat that can realize air circulation between an occupant and a seating surface and air blowing to an occupant seated in a rear seat without using a plurality of blower devices.

[0008] To solve the above problems, one aspect of the present invention provides a vehicle seat (1) comprising a seat body (3) having a seat back (7) and a seat cushion (6), and a ventilation unit (61) provided on the seat body, wherein a ventilation passage (31) for blowing air onto the seated person is formed inside the seat cushion, and an air outlet (68) opening toward the rear is provided on the rear surface of the seat back, and the ventilation unit comprises a ventilation device (62) having one intake port (66) and two discharge ports (67, 67A, 67B), a first duct (63) connecting one of the discharge ports and the ventilation passage, and a second duct (64) connecting the other discharge port and the intake port.

[0009] According to this embodiment, when the blower is activated, air is introduced into the ventilation passage inside the seat cushion via the first duct, and air circulates between the occupant and the seat surface. At the same time, air is sent to the air outlet via the second duct, and air is supplied to the occupant seated in the rear seat. Thus, it is possible to provide a vehicle seat that can achieve both air circulation between the occupant and the seat surface and air supply to the occupant seated in the rear seat.

[0010] In the above embodiment, preferably, the seat body has a cushion frame (16) that forms the skeleton of the seat cushion and a back frame (42) connected to the rear of the cushion frame and forming the skeleton of the seat back, and the blower is arranged so that the air intake faces downward and is connected to the lower surface of the cushion frame.

[0011] According to this embodiment, since the blower is coupled to the underside of the cushion frame, the noise generated by the operation of the blower is less likely to be transmitted to the occupant, thereby improving the comfort of the vehicle seat.

[0012] In the above embodiment, preferably, the cushion frame includes a pair of left and right cushion side members (21), a pair of front and rear cushion cross members (22, 23) connecting the left and right cushion side members, and a pressure receiving member (26) stretched across the front and rear cushion cross members, and the blower is coupled to the lower surface of the pressure receiving member.

[0013] According to this embodiment, the blower can be well coupled to the cushion frame.

[0014] In the above embodiment, preferably, an inlet (35A) for introducing air into the ventilation passage is provided on the lower surface of the seat cushion, the blower is positioned behind the inlet, and the first duct extends forward from the blower and is connected to the inlet.

[0015] According to this embodiment, the blower can be positioned further back than when it is positioned in front of the air intake. This makes it possible to more effectively prevent the occupant's legs from coming into contact with the blower and causing a feeling of foreign object in the occupant.

[0016] In the above embodiment, preferably, the seat body has a cushion pad (17) placed on the upper surface of the cushion frame and a cushion surface material (18) that covers at least the upper surface of the cushion pad, and the ventilation passage is provided in the cushion pad.

[0017] According to this embodiment, a ventilation channel can be formed to allow air to circulate between the seated person and the seating surface.

[0018] In the above embodiment, preferably, the second duct extends rearward from the blower.

[0019] According to this embodiment, the second duct can be arranged to extend toward the seat cushion side.

[0020] In the above embodiment, preferably, the back frame has a pair of left and right back side members, a back lower member (48) connecting the lower ends of the back side members, and a back upper member (47) connecting the upper ends of the back side members, and the second duct passes behind the back lower member and extends upward.

[0021] According to this embodiment, the second duct can be easily installed in the seat back body.

[0022] In the above embodiment, preferably, the seat body has a cushion frame (16) that forms the skeleton of the seat cushion, and a back frame (42) connected to the rear of the cushion frame and forming the skeleton of the seat back, the back frame comprising a pair of left and right back side members (46), a back lower member (48) connecting the lower ends of the back side members, and a back upper member (47) connecting the upper ends of the back side members, the back frame having brackets (53) connected to the back side members at its left and right ends, an air outlet forming portion (65) that defines the edge of the air outlet being connected to the bracket, the second duct extending upward and connected to the air outlet.

[0023] In this embodiment, the air inlet is formed by the air inlet forming section, and the air inlet forming section is supported by the back side member via a bracket. This allows the position and shape of the air inlet to be stably maintained. The second duct is also supported by the back side member via the air inlet forming section, which further stabilizes the position and shape of the second duct.

[0024] In the above embodiment, preferably, a back table (81) is provided on the rear surface of the seat back so as to be rotatable about an axis extending in the left-right direction, and the back table is displaced by rotation about the axis to a closed position that closes the air supply port and an open position that opens the air supply port.

[0025] According to this embodiment, the air supply port can be opened and closed by changing the position of the back table.

[0026] In the above embodiment, preferably, the back table has a flat table body (83) and a shaft portion (84) provided on the edge of the table body and extending along the axis, and the air inlet forming portion is provided with a pair of left and right support portions (85) that support the left and right ends of the shaft portion so as to be rotatable about the axis.

[0027] In this embodiment, the back table is supported by the back frame via a support portion and an air outlet forming portion. Therefore, the back table can be properly supported by the seat body.

[0028] In the above embodiment, preferably, the back table has a flat table body (83) and a shaft portion (84) provided on the edge of the table body and extending along the axis, and the bracket is provided with a pair of left and right support portions (85) that support the left and right ends of the shaft portion so as to be rotatable about the axis.

[0029] In this embodiment, the back table is supported by the back frame via a support and a bracket. Therefore, the back table can be properly supported by the seat body.

[0030] One aspect of the present invention is a vehicle seat (1) comprising a seat body (3) having a seat back (7) and a seat cushion (6), and a blower unit (61) provided on the seat body, wherein a ventilation passage (31) for blowing air onto the seated person is formed inside the seat cushion, and an air outlet (68) opening toward the rear is provided on the rear surface of the seat back, and the blower unit comprises a blower device (62) having one intake port (66) and two discharge ports (67, 67A, 67B), a first duct (63) connecting one of the discharge ports and the ventilation passage, and a second duct (64) connecting the other discharge port and the intake port.

[0031] According to this embodiment, when the blower is activated, air is introduced into the ventilation passage inside the seat cushion via the first duct, and air circulates between the occupant and the seat surface. At the same time, air is sent to the air outlet via the second duct, and air is supplied to the occupant seated in the rear seat. Thus, it is possible to provide a vehicle seat that can achieve both air circulation between the occupant and the seat surface and air supply to the occupant seated in the rear seat.

[0032] In the above embodiment, preferably, the seat body has a cushion frame (16) that forms the skeleton of the seat cushion and a back frame (42) connected to the rear of the cushion frame and forming the skeleton of the seat back, and the blower is arranged so that the air intake faces downward and is connected to the lower surface of the cushion frame.

[0033] According to this embodiment, since the blower is coupled to the underside of the cushion frame, the noise generated by the operation of the blower is less likely to be transmitted to the occupant, thereby improving the comfort of the vehicle seat.

[0034] In the above embodiment, preferably, the cushion frame includes a pair of left and right cushion side members (21), a pair of front and rear cushion cross members (22, 23) connecting the left and right cushion side members, and a pressure receiving member (26) stretched across the front and rear cushion cross members, and the blower is coupled to the lower surface of the pressure receiving member.

[0035] According to this embodiment, the blower can be well coupled to the cushion frame.

[0036] In the above embodiment, preferably, an inlet (35A) for introducing air into the ventilation passage is provided on the lower surface of the seat cushion, the blower is positioned behind the inlet, and the first duct extends forward from the blower and is connected to the inlet.

[0037] According to this embodiment, the blower can be positioned further back than when it is positioned in front of the air intake. This makes it possible to more effectively prevent the occupant's legs from coming into contact with the blower and causing a feeling of foreign object in the occupant.

[0038] In the above embodiment, preferably, the seat body has a cushion pad (17) placed on the upper surface of the cushion frame and a cushion surface material (18) that covers at least the upper surface of the cushion pad, and the ventilation passage is provided in the cushion pad.

[0039] According to this aspect, it is possible to configure a ventilation path for circulating air between a seated person and the seating surface.

[0040] In the above aspect, preferably, the second duct extends rearward from the blower device.

[0041] According to this aspect, the second duct can be arranged to extend toward the seat cushion side.

[0042] In the above aspect, preferably, the back frame includes a pair of left and right back side members, a back lower member (48) connecting lower ends of the back side members, and a back upper member (47) connecting upper ends of the back side members, and the second duct extends upward passing behind the back lower member.

[0043] According to this aspect, the second duct can be easily arranged in the seat back main body.

[0044] In the above aspect, preferably, the seat main body has a cushion frame (16) forming a framework of the seat cushion, and a back frame (42) connected to a rear portion of the cushion frame and forming a framework of the seat back, the back frame includes a pair of left and right back side members (46), a back lower member (48) connecting lower ends of the back side members, and a back upper member (47) connecting upper ends of the back side members, the back frame has brackets (53) connected to the back side members at left and right end portions, an air supply port forming portion (65) that defines an edge portion of the air supply port is coupled to the bracket, and the second duct extends upward and is connected to the air supply port.

[0045] According to this aspect, the air supply port is configured by the air supply port forming portion, and the air supply port forming portion is supported by the back side members via the brackets. Thereby, the position and shape of the air supply port can be stably maintained. Since the second duct is also supported by the back side members via the air supply port forming portion, the position and shape of the second duct can be further stabilized.

[0046] In the above aspect, preferably, a back table (81) connected rotatably about an axis extending in the left-right direction is provided on the rear surface of the seat back, and the back table is displaced between a closed position for closing the air supply port and an open position for opening the air supply port by rotating about the axis.

[0047] According to this aspect, the air supply port can be opened and closed by changing the position of the back table.

[0048] In the above aspect, preferably, the back table has a flat plate-shaped table main body (83), and a shaft portion (84) provided at an edge of the table main body and extending along the axis, and the air supply port forming portion is provided with a pair of left and right support portions (85) that respectively support the left and right end portions of the shaft portion rotatably about the axis.

[0049] According to this aspect, the back table is supported by the back frame via the support portions and the air supply port forming portion. Therefore, the back table can be favorably supported on the seat main body.

[0050] In the above aspect, preferably, the back table has a flat plate-shaped table main body (83), and a shaft portion (84) provided at an edge of the table main body and extending along the axis, and the bracket is provided with a pair of left and right support portions (85) that respectively support the left and right end portions of the shaft portion rotatably about the axis.

[0051] According to this aspect, the back table is supported by the back frame via the support portions and the bracket. Therefore, the back table can be favorably supported on the seat main body.

[0052] Perspective view of the vehicle seat according to the first embodiment when viewed from the front at an angle Perspective view of the vehicle seat according to the first embodiment when viewed from the rear at an angle Perspective view of the cushion frame and back frame Cross section of Figure 1, section IV-IV Top view of the pad members constituting the seat cushion Exploded perspective view of the pad members constituting the seat cushion Rear view of the back frame Top view of the cushion frame Rear view of the back frame of the vehicle seat according to the first modified example (A) Second modified example, (B) Third modified example, and (C) Rear view of the back frame for explaining the configuration of the blower unit in the fourth modified example (A) Fifth modified example Rear view of a vehicle seat according to the example and (B) sixth modified example Perspective view of the vehicle seat according to the second embodiment when viewed from the front at an angle Perspective view of the vehicle seat according to the second embodiment when viewed from the rear at an angle, and an enlarged view of the portion enclosed by the dashed line Perspective view showing the vehicle seat according to the second embodiment when the air blower unit is attached by a hook Exploded perspective view of the air blower unit Perspective view of the blower and duct of the air blower unit when viewed from the rear Rear view of the vehicle seat in an example configuration in which a storage section is provided in the seat body, showing the air blower unit in (A) storage position and (B) deployed position

[0053] The vehicle seat according to the present invention will be described below with reference to the drawings. For the sake of clarity, the forward / backward, up / down, and left / right directions will be defined and described based on the perspective of an occupant seated in the vehicle seat (hereinafter referred to as the "seatee"). In the following description, where necessary, the direction away from the seatee in the left / right direction will be referred to as the "outside of the seat," and the direction towards the seatee will be referred to as the "inside of the seat."

[0054] <<First Embodiment>> The vehicle seat 1 is a seat in which one occupant can sit. For example, as shown in Figure 1, the vehicle seat 1 may constitute a passenger seat. The vehicle seat 1 is placed in the passenger compartment (vehicle compartment 2) of an automobile, which has two rows of seats, front and rear. In Figure 1, the right side corresponds to the interior of the vehicle and the left side corresponds to the exterior of the vehicle.

[0055] As shown in Figures 1 and 2, the vehicle seat 1 has a seat body 3 on which a person sits. The seat body 3 is placed on the floor 4 that defines the lower edge of the vehicle compartment 2. The seat body 3 has a seat cushion 6 and a seat back 7 that extends upward from the rear of the seat cushion 6.

[0056] The seat cushion 6 constitutes the seat surface 6S on which the sitter sits, and supports the sitter's buttocks. The front of the seat back 7 constitutes the backrest surface 7S on which the sitter leans, and supports the sitter's back. Hereafter, the seat surface 6S and the backrest surface 7S will be collectively referred to as the seat surface 3S, as necessary.

[0057] In this embodiment, a headrest 8 is provided on the upper part of the seat back 7. The headrest 8 supports the occupant's head from behind. The headrest 8 has two pillars 10 (also called headrest pillars) that protrude downward. The headrest 8 is connected to the seat back 7 by inserting each of its pillars 10 into a headrest guide 11 (see Figure 3) provided on the upper part of the seat back 7.

[0058] In addition, the seat body 3 may be provided with armrests (not shown) to support the occupant's arms. The armrests are preferably columnar in shape extending in the front-to-back direction and rotatably connected at their rear ends to the left and right sides of the seat back 7 about an axis extending in the left-to-right direction.

[0059] The seat cushion 6 is connected to the floor 4 via a pair of left and right slide rails 14. This allows the seat body 3 to be supported on the floor 4 so that it can slide.

[0060] <Seat Cushion Frame> As shown in Figures 3 and 4, the seat cushion 6 has a cushion frame 16 (see Figures 3 and 4) that forms the skeleton, a pad member 17 (see Figure 4) supported by the cushion frame 16, and a surface material 18 (see Figure 4) that covers the surface of the pad member 17. In cases where it is necessary to distinguish it from the members provided on the seat back 7, the pad member 17 may be called the cushion pad member, and the surface material 18 may be called the cushion surface material.

[0061] The pad member 17 is made of an elastic material such as urethane foam, and the surface material 18 is made of fabric, leather, or the like. In this embodiment, a heater 19 for warming the seat surface 6S is provided between the upper surface of the pad member 17 and the lower surface of the surface material 18.

[0062] As shown in Figure 3, the cushion frame 16 includes a frame (hereinafter referred to as the cushion frame 20) that forms a rectangular frame shape when viewed from above. The cushion frame 20 has a pair of left and right cushion side members 21 that extend in the front and rear directions, a front member 22 that connects the front parts of the left and right cushion side members 21, and a rear member 23 that connects the rear parts of the left and right cushion side members 21.

[0063] Each cushion side member 21 is made of a bent metal plate material having a surface facing left or right. The front member 22 and rear member 23 are each made of a round metal pipe and are connected at both ends to the inner surface of the cushion side member 21. The front member 22 and rear member 23 correspond to a pair of front and rear cross members (also called cushion cross members or connecting members) that are arranged in the front-rear direction and connect the left and right cushion side members 21.

[0064] The cushion frame 16 further includes a substantially flat pan frame 24 having a surface facing vertically. The pan frame 24 is positioned to cover the front upper surfaces of the left and right cushion side members 21 and is connected to the left and right cushion side members 21.

[0065] In this embodiment, the cushion frame 16 is connected to the slide rail 14 via a known height adjustment mechanism 25. The height adjustment mechanism 25 supports the cushion frame 16 so that it can be displaced vertically relative to the floor 4, and the slide rail 14 supports it so that it can move back and forth relative to the floor 4.

[0066] The seat cushion 6 further includes a cushion pressure receiving member 26 positioned between the left and right cushion side members 21. The cushion pressure receiving member 26 spans across the front member 22 and the rear member 23 and is connected to the front member 22 and the rear member 23.

[0067] As shown in Figures 3 and 4, the cushion pressure receiving member 26 has a bottom portion 26A, a front inclined portion 26B, a front fastening portion 26C, a rear inclined portion 26D, and a rear fastening portion 26E.

[0068] The bottom portion 26A is a roughly horizontal plate shape. The front inclined portion 26B is a plate shape that slopes upward toward the front from the front edge of the bottom portion 26A. The rear inclined portion 26D is a plate shape that slopes upward toward the rear from the rear edge of the bottom portion 26A. The bottom portion 26A, the front inclined portion 26B, and the rear inclined portion 26D form a recessed area 26F that is recessed downward in the cushion pressure receiving member 26. The recessed area 26F is shaped to be recessed downward so as to conform to the buttocks of the person sitting.

[0069] The front fastening portion 26C is connected to the front end of the front inclined portion 26B and is slidably fastened to the outer circumferential surface of the front member 22. The rear fastening portion 26E is connected to the rear end of the rear inclined portion 26D and is slidably fastened to the rear member 23. As a result, the cushion pressure receiving member 26 is connected to the cushion frame 20 and receives the load applied by the occupant via the pad member 17, supporting the occupant's buttocks.

[0070] As shown in Figure 3, in this embodiment, the cushion pressure receiving member 26 is composed of a plurality of flexible metal wires (hereinafter referred to as cushion wires 28) stretched between the front member 22 and the rear member 23, and a flexible resin plate (hereinafter referred to as cushion plate 29). The metal wires constituting the cushion wires 28 are also referred to as rod-shaped members, wire springs, etc. The cushion wires 28 are preferably embedded inside the cushion plate 29 by insert molding.

[0071] <Pad Member> The pad member 17 is placed on the upper surface of the cushion pressure receiving member 26. As shown in Figures 4 and 5, the pad member 17 (also called the cushion pad) has a ventilation passage 31 for blowing air onto the seated person. The ventilation passage 31 is formed to extend from the lower surface to the upper surface of the pad member 17. Air is blown into the ventilation passage 31 from below, thereby realizing air ventilation that circulates air between the seated person and the seat surface 6S.

[0072] In this embodiment, as shown in Figure 6, the pad member 17 comprises a pad member body 32 that constitutes its lower part, a passage forming portion 33 that is placed on the upper surface of the pad member body 32, and an air outlet forming portion 34 that is placed on the upper surface of the passage forming portion 33.

[0073] The pad member body 32 constitutes the lower part of the pad member 17. The pad member body 32 is provided with a through hole 35 that penetrates vertically. The through hole 35 defines the upstream portion of the ventilation passage 31, and the lower end of the through hole 35 constitutes an inlet 35A for introducing air into the ventilation passage 31 (see Figure 4). The cushion pressure receiving member 26 has a through hole 36 that penetrates vertically, positioned to overlap the through hole 35 from below. As shown in Figure 4, the through hole 36 is provided in the left-right central portion of the forward inclined portion 26B.

[0074] As shown in Figure 6, the passage forming portion 33 is made of a plate-shaped member. The passage forming portion 33 has a passage forming hole 37 that penetrates in the vertical direction. The passage forming portion 33 comprises a main portion 38 and a pair of left and right branch portions 39 that are connected to the main portion 38 at the base end, branch to the left and right, extend diagonally forward, and then bend forward, and has a substantially Y-shaped cross-section. The passage forming portion 33 is positioned on the upper surface of the pad member body 32 such that the main portion 38 overlaps the through hole 35 of the pad member body 32.

[0075] The air vent forming section 34 is also made of a plate-shaped member. The air vent forming section 34 is positioned to overlap the passage forming hole 37 from above. The air vent forming section 34 is provided with openings 40 that penetrate vertically at positions that overlap each of the branching sections 39 of the passage forming hole 37. The passage forming section 33 is sandwiched between the pad member body 32 and the air vent forming section 34, thereby forming the downstream portion of the ventilation passage 31, which passes from the opening of the through hole 35 through the main section 38 and the branching section 39, and reaches the outside of the seat cushion 6 through the openings 40. In this embodiment, the openings 40 are formed in pairs, left and right, and three pairs of these openings 40 are arranged in the front-to-back direction at positions corresponding to each of the branching sections 39.

[0076] The heater 19 may be a known heater having a sheet-like base fabric 41 (see Figure 5) and heater wires (not shown) provided on the base fabric 41, which generate heat when power is supplied to the heater wires. In this embodiment, as shown in Figure 5, the heater 19 is positioned so as to overlap the opening 40 in at least a portion when viewed from above. More specifically, the base fabric 41 of the heater 19 is positioned so as to overlap the pair of two sets of openings 40 located at the rear end.

[0077] <Seat Back Frame> As shown in Figures 3, 4, and 7, the seat back 7, like the seat cushion 6, has a back frame 42 that forms the skeleton (see Figures 3 and 7), a pad member 43 supported by the back frame 42 (see Figure 4), and a surface material 44 that covers the surface of the pad member 43 (see Figure 4). Similar to the seat cushion 6, the pad member 43 that makes up the seat back 7 is also made of an elastic material such as urethane foam, and the surface material 44 that makes up the seat back 7 is also made of fabric, leather, or the like.

[0078] As shown in Figure 7, the back frame 42 includes a frame (hereinafter referred to as the back frame 45) that forms a rectangular frame shape when viewed from the front. The back frame 45 has left and right back side members 46 that extend vertically, a back upper member 47 that extends horizontally and is connected to the upper ends of the left and right back side members 46, and a back lower member 48 that extends horizontally and is connected to the lower ends of the left and right back side members 46.

[0079] The lower ends of the left and right backside members 46 are rotatably connected to the rear ends of the corresponding cushion side members 21 on the left and right sides via a reclining device 49, about an axis extending in the left-right direction.

[0080] In this embodiment, the back frame 45 is constructed by joining multiple metal plates. Specifically, most of the back frame 45, excluding the upper ends of the left and right back side members 46, is formed by sheet metal members 51 with their surfaces facing left and right. The upper ends of the back upper member 47 and the left and right back side members 46 are constructed by a bent, circular-section pipe 52. The central part of the pipe 52 extends left and right in the longitudinal direction to form the back upper member 47, and the left and right ends in the longitudinal direction bend downward to form the upper ends of the left and right back side members 46. Both ends of the pipe 52 are positioned along the inner surfaces of the left and right sheet metal members 51 that form the back side members 46 and are welded to the sheet metal members 51. The back lower member 48 is formed from the sheet metal members 51 and is positioned with its surfaces facing front and back. The left and right ends of the back lower member 48 are welded to the trailing edges of the lower ends of the corresponding back side members 46 on the left and right.

[0081] In this embodiment, the back frame 45 includes a back cross member 53 that connects the upper parts of the left and right back side members 46. The back cross member 53 is formed of a sheet metal member 53A whose surface faces in the front-rear direction. The left and right ends of the back cross member 53 are each connected to the corresponding back side members 46. As shown in Figure 3, the lower edge of the back cross member 53 is provided with a folded portion 53B that is folded forward at the left and right center portions.

[0082] Two headrest guides 11 are provided on the upper part of the back frame 45. Each headrest guide 11 is cylindrical and has an opening at its upper and lower ends. The pillar 10 is inserted into the opening at the upper end of the headrest guide 11, thereby supporting the headrest 8 on the upper part of the seat back 7.

[0083] As shown in Figure 7, an airbag module 54 may be fixed to the side of the backside member 46 that is on the outside of the seat. The airbag module 54 may be fixed to one side of the backside member 46 that is on the outside of the seat (for example, the side facing the outside of the vehicle), or it may be fixed to both sides.

[0084] The seat back 7 further includes a back pressure receiving member 55 positioned between the left and right back side members 46. The back pressure receiving member 55 spans the back upper member 47 and the back lower member 48. The back pressure receiving member 55 receives a portion of the load from the occupant leaning against the seat back 7 via a pad member 43, and supports the occupant's upper body, including their back.

[0085] The back pressure receiving member 55 includes a back wire 56 stretched across the back frame 45 and a pressure receiving plate 57 supported by the back frame 45 via the back wire 56.

[0086] The back wire 56 is made of a flexible metal wire (also called a rod-shaped member or wire spring) that has been bent. The back wire 56 has a pair of left and right vertical frame portions 56A and lower frame portions 56B that extend to the left and right and connect the lower ends of the vertical frame portions 56A, and has a substantially U-shape. The upper ends of the vertical frame portions 56A are each connected to the lower edge of the back cross member 53, and the lower frame portions 56B are connected to the back lower member 48. As a result, the back pressure receiving member 55 is connected to the back frame 45 while being spanned across it.

[0087] The pressure-receiving plate 57 is made of a flexible resin plate-like member. The pressure-receiving plate 57 is located inside the back frame 45, in the lower half thereof, and is connected to the back wire 56 from the front. In this way, the pressure-receiving plate 57 is supported by the back frame 45 via the back wire 56.

[0088] The pad member 43 that constitutes the seat back 7 is positioned in front of the back pressure receiving member 55. A portion of the rear surface of the pad member 43 abuts against the front surface of the pressure receiving plate 57, and the pad member 43 is supported by the back frame 45 and the back pressure receiving member 55.

[0089] When a occupant leans against the seatback 7 and a load is applied to the front of the seatback 7, a portion of that load is transmitted to the back pressure receiving member 55 via the pad member 43. The back pressure receiving member 55 receives the load applied by the occupant via the pad member 43 and supports the occupant's back.

[0090] Note that the back pressure receiving member 55 shown in Figures 4 and 8 is merely an example, and the back pressure receiving member 55 may be composed of, for example, metal wires that meander in the left-right direction and are fixed at both ends to the left and right back side members 46, respectively.

[0091] <Air Blower Unit> As shown in Figures 4 and 7, the vehicle seat 1 is equipped with an air blower unit 61. The air blower unit 61 is a device that provides both air to the ventilation passage 31 located inside the seat cushion 6 and air to the seated person located behind the seat body 3.

[0092] As shown in Figure 4, the air blowing unit 61 includes a blower 62, a first duct 63 and a second duct 64, and an air outlet forming section 65.

[0093] Blower 62 is an example of a blower, and is equipped with one intake port 66 and two discharge ports 67. Blower 62 can draw in air from intake port 66 and exhaust air simultaneously from the two discharge ports 67. However, blower 62 may be configured to be able to exhaust air simultaneously from both discharge ports 67, as well as selectively exhaust air from either one of the discharge ports 67. In that case, it is preferable that blower 62 be provided with a switch or the like for selecting the exhaust mode and / or discharge port 67. Hereinafter, one of the discharge ports 67 will be referred to as the first discharge port 67A, and the other discharge port 67 as the second discharge port 67B.

[0094] The blower 62 is positioned so that its intake port 66 faces downward, its first discharge port 67A faces forward, and its second discharge port 67B faces rearward, and is coupled to the lower surface of the cushion frame 16 behind the through hole 36. In this embodiment, the blower 62 is coupled to the lower surface of the bottom 26A of the cushion pressure receiving member 26. Alternatively, the blower 62 may be coupled to the cushion pressure receiving member 26 by fastening it to a boss or the like provided on the bottom 26A.

[0095] The first duct 63 is a cylindrical member, and is made of, for example, a resin member. As shown in Figure 8, the first duct 63 is connected to the first discharge port 67A at one end (also called the upstream end). As shown in Figure 4, the first duct 63 extends forward from the first discharge port 67A, then bends upward and passes through the through hole 36 of the forward inclined portion 26B (see also Figure 8), and the other end (also called the downstream end) is connected to the inlet 35A of the pad member 17. In this way, the first duct 63 connects the first discharge port 67A to the ventilation passage 31 formed inside the pad member 17 of the seat cushion 6. A flexible bellows section may be provided near the downstream end of the first duct 63 to accommodate deformation of the cushion pressure receiving member 26 due to the load when seated.

[0096] The second duct 64 is a cylindrical member, made of, for example, a resin member. The second duct 64 is connected to the second discharge port 67B at one end (also called the upstream end). The second duct 64 extends rearward from the second discharge port 67B, then bends upward behind the rear member 23, and is introduced into the interior of the seat back 7. Inside the seat back 7, the second duct 64 passes behind the back lower member 48, extends upward, and is connected to the air intake port forming section 65. By arranging the second duct 64 to pass behind the back lower member 48 in this way, the second duct 64 can be easily installed in the seat back 7 even after the pad member 43 of the seat back 7 is assembled to the back frame 42, compared to when it passes in front of the back lower member 48.

[0097] Furthermore, a flexible bellows section may be provided near the portion of the second duct 64 that bends upward behind the rear member 23. This allows the second duct 64 to more reliably follow the rotation (i.e., reclining) of the back frame 42 relative to the cushion frame 16.

[0098] The air vent forming portion 65 is a roughly rectangular tubular member, and is made of, for example, a resin member. As shown in Figure 2, an opening (not shown) is formed in the surface material 44 of the seat back 7 at a position corresponding to the air vent forming portion 65. The air vent forming portion 65 is fixed to the surface material 44 by stitching, adhesive, or locking at a position that overlaps with the opening formed in the surface material 44.

[0099] The air inlet forming portion 65 is provided with a locking portion 65A that protrudes upward from its outer circumferential surface. A clip is provided on the front surface of the locking portion 65A, and the back cross member 53 is provided with a locking hole (not shown) into which the locking portion 65A is locked. As shown in Figure 7, when the locking portion 65A is locked into the locking hole, the air inlet forming portion 65 is coupled to the lower part of the back cross member 53 at its upper part and supported by the back frame 42 at its upper part.

[0100] The air intake forming section 65 is equipped with an air intake 68 that penetrates in the front-to-back direction. The air intake 68 is substantially rectangular in shape when viewed from the front. The air intake forming section 65 defines the edge of the air intake 68. In this embodiment, a louver 69 for changing the direction of airflow is provided on the air intake 68.

[0101] As shown in Figure 4, the second duct 64 extends upward inside the seat back 7 and is connected to the air intake 68 at its downstream end. This creates an air intake 68 on the rear surface of the seat back 7 that opens towards the rear and supplies air to the rear seat occupants. The second duct 64 also connects the second discharge port 67B to the air intake 68 and is supported by the back frame 42 at its downstream end via the air intake forming section 65. In the example shown in Figure 7, the downstream end of the second duct 64 is configured to expand to match the shape of the air intake 68.

[0102] Next, the operation of the vehicle seat 1 configured in this way, and in particular the operation and effects of its air blower unit 61, will be described.

[0103] When the blower 62 is activated, air is drawn in through the intake port 66 and discharged from the first discharge port 67A and the second discharge port 67B, respectively. The air discharged from the first discharge port 67A passes through the first duct 63 and is introduced into the ventilation passage 31 provided inside the pad member 17 of the seat cushion 6. The air introduced into the ventilation passage 31 is discharged to the outside of the seat cushion 6 through the opening 40, allowing air to circulate between the occupant and the seat.

[0104] At the same time, the air discharged from the second outlet 67B passes through the second duct 64 and is discharged rearward from the air outlet 68 of the air outlet forming section 65. Therefore, a single air blowing unit 61 can achieve both air circulation between the seated person and the seating surface 3S, and air supply to the occupants seated in the rear seats.

[0105] <First Modified Example> In the above embodiment, the second duct 64 was configured to extend upward at its downstream end, but as shown in Figure 9, it may be bent in the sheet width direction near the downstream end and connected to the air inlet forming portion 65.

[0106] <Second to Fourth Modifications> In the above embodiment, the air blowing unit 61 was configured to blow air towards the buttocks of the seated person and towards the seated person in the rear seat. However, a unit can also be configured that is solely for the purpose of blowing air towards the seated person in the rear seat.

[0107] Figures 10(A) to (C) show three modified versions (hereinafter referred to as the second to fourth modified versions) in which the air blower unit 61 is built into the seat back 7 and is configured as a unit solely for the purpose of blowing air toward the rear seat occupants. In the second to fourth modified versions, the air blower unit 61 has a blower 62 with one intake port 66 and one discharge port 67, an intake duct 71 connected to the intake port 66, and an exhaust duct 72 connected to the discharge port 67.

[0108] As shown in Figure 10(A), in the second modified example, the blower 62 is connected to the rear surface of the back cross member 53, approximately in the center in the left-right direction. Intake port forming portions 74 are provided on the left and right sides of the upper end of the seat back 7. The intake port forming portion 74 is cylindrical and connected to the seat back 7 at one end. At the other end, the intake port forming portion 74 forms an intake port 74A that opens forward. The intake duct 71 connects the intake port forming portion 74 to the intake port 66 of the blower 62. An air supply port forming portion 65 similar to that in Figure 2 is provided on the back of the seat back 7, and the exhaust duct 72 connects the discharge port 67 of the blower 62 to the air supply port 68 of the air supply port forming portion 65. When the blower 62 is driven, air is drawn in from the intake port 74A of the intake port forming portion 74, and air is sent out towards the rear seat from the air supply port 68.

[0109] As shown in Figure 10(B), in the third modified example, similar to Figure 2, an air inlet forming portion 65 is provided on the back cross member 53. An extension portion 65B is provided on the air inlet forming portion 65. The extension portion 65B is connected to the right outer surface and the lower outer surface of the air inlet forming portion 65, has a plate-like shape with a surface facing in the front-rear direction, and is housed inside the seat back 7. The blower 62 is connected to the rear surface of its extension portion 65B. An intake port forming portion 74 is further connected to the rear surface of the extension portion 65B. The intake port forming portion 74 has a bottomed, roughly rectangular box shape and protrudes toward the rear. The rear end of the intake port forming portion 74 passes through an opening provided in the surface material 44 of the seat back 7 and reaches the outside of the seat back 7, forming an intake port 74A that opens toward the rear. Connection ports 74B to which the intake duct 71 is connected are provided on the left and right sides of the intake port forming portion 74.

[0110] One end of the intake duct 71 is connected to the intake port 66 of the blower 62, and the other end is connected to the suction port 74A via the connection port 74B. One end of the exhaust duct 72 is connected to the discharge port 67 of the blower 62, and the other end is connected to the air outlet 68 of the air outlet forming section 65.

[0111] In the case shown in Figure 10(B), when the blower 62 is driven, air is drawn in from the intake port 74A of the intake port forming section 74, and the air is sent out towards the rear seats from the air outlet 68. In the example shown in Figure 10(B), the intake port 74A is located below the air outlet 68. The intake port 74A may be provided with a mesh-like screen (not shown) to prevent the entry of foreign matter such as dust, and the air outlet 68 may be provided with a louver 69 for changing the direction of airflow, similar to the first embodiment.

[0112] As shown in Figure 10(C), in the fourth modified example, the air supply port 68 is provided on the upper rear surface of the seat back 7, and the air intake port 74A is provided on the lower rear surface of the seat back 7.

[0113] As shown in Figure 10(C), the blower 62 is connected to the rear surface of the extension 65B of the air inlet forming portion 65, similar to the third modified example. A lower plate 75 having a rearward-facing surface is provided at the lower part of the seat back 7. The lower plate 75 is provided with an intake port forming portion 74, similar to the third modified example. The intake port forming portion 74 forms an intake port 74A that opens towards the rear. The intake port forming portion 74 has a connection port 74B on its upper side to which the intake duct 71 is connected.

[0114] The lower plate 75 is connected to the back lower member 48 and supported by the back frame 42. The surface material 44 of the seat back 7 may be provided with an opening (not shown) for passing the rear end of the intake port forming portion 74.

[0115] One end of the intake duct 71 is connected to the intake port 66 of the blower 62 and extends downward, while the other end is connected to the suction port 74A via the connection port 74B. One end of the exhaust duct 72 is connected to the discharge port 67 of the blower 62, and the other end is connected to the air outlet 68 of the air outlet forming section 65.

[0116] In the case shown in Figure 10(C), when the blower 62 is driven, air is drawn in from the intake port 74A of the intake port forming section 74, and the air is sent out towards the rear seats from the air outlet 68. In the example shown in Figure 10(C), the intake port 74A is located below the air outlet 68. The intake port 74A may be provided with a mesh-like screen (not shown) to prevent the entry of foreign matter such as dust, and the air outlet 68 may be provided with a louver 69 for changing the direction of airflow, similar to the first embodiment.

[0117] <Fifth Modification> Figure 11(A) shows a vehicle seat 1 according to the fifth modification. In the vehicle seat 1 according to the fifth modification, the air blower unit 61 is configured to blow air towards the buttocks of the seated person and towards the seated person in the rear seat, similar to the first embodiment shown in Figures 1 to 8. However, the fifth modification differs in that a back table 81 is provided on the rear surface of the seat back 7, and the other configurations are the same as in the above embodiment.

[0118] The back table 81 comprises a table body 83 that is roughly flat and a shaft portion 84 provided on the edge of the table body 83.

[0119] The table body 83 is roughly rectangular in shape. The shaft portions 84 are provided on each of the end faces in the shorter direction of the table body 83. Each shaft portion 84 is cylindrical in shape and protrudes outward along a predetermined axis.

[0120] The air intake vent forming section 65 is provided with a pair of left and right support sections 85. Each support section 85 is connected to the rear surface of the cross member and protrudes rearward. The support sections 85 pass through through holes provided in the upholstery material 44 of the seat back 7 and extend to the rear of the upholstery material 44 of the seat back 7.

[0121] The support portion 85 may be integrally molded with the air outlet forming portion 65, or it may be made of a separate resin member. If the support portion 85 is made of a separate resin member, it may be fixed by clipping it into a locking hole provided in the air outlet forming portion 65.

[0122] Each support portion 85, on its inner surface on the inside of the sheet, supports the left and right ends of the shaft portion 84 so that they can rotate around a rotation axis extending in the left-right direction.

[0123] As a result, the back table 81 is rotatably connected to the rear surface of the seat back 7 about an axis extending in the left-right direction. Rotation around this axis causes the back table 81 to be displaced between an open position where the table body 83 is horizontal and the air vent 68 is open, and a closed position where the table body 83 extends vertically and the air vent 68 is closed. When the back table 81 is in the open position, its upper surface forms a horizontal plane and functions as a table on which objects can be placed.

[0124] In the fifth modified example of the vehicle seat 1, as shown in Figure 11(A), the back table 81 is displaced from the open position to the closed position by rotating upward (see the arrow in Figure 11(A)).

[0125] In this way, the air vent 68 can be opened and closed by changing the position of the back table 81. Therefore, since the air vent 68 can be opened and closed by the back table 81 without the need to provide a separate member for closing the air vent 68, the number of parts in the vehicle seat 1 can be reduced, and the cost can be reduced while ensuring convenience.

[0126] The back table 81 is connected to the back cross member 53 (also called a bracket) via the support portion 85 and the air supply port forming portion 65, and is supported by the back frame 42. This allows the back table 81 to be properly supported by the seat body 3.

[0127] Furthermore, an upper pocket 86 for storing items may be provided at the top of the seat back 7.

[0128] <Sixth Modification> Figure 11(B) shows a vehicle seat 1 according to the sixth modification. The vehicle seat 1 according to the sixth modification differs from the vehicle seat 1 according to the fifth modification in that the support portion 85 is provided on the back cross member 53 (bracket), the air supply port 68 is provided below the shaft portion 84, and the back table 81 rotates downward (see the arrow in Figure 11(B)) to displace from the open position to the closed position. The other configurations are the same as those of the fifth modification, so their explanation is omitted.

[0129] In the sixth modified example, the support portion 85 may be integrally molded with the back cross member 53, or it may be made of a separate resin member. If the support portion 85 is made of a separate resin member, it may be fixed by clipping it into a locking hole provided in the back cross member 53.

[0130] In the sixth modified example, as in the fifth modified example, the air outlet 68 can be opened and closed by changing the position of the back table 81.

[0131] <<Second Embodiment>> In the first embodiment described above, the air blower unit 61 was built into the seat body 3, but it can also be configured as an external unit that can be attached to the seat body 3. However, in this case, the air blower unit 61 is configured solely for the purpose of blowing air towards the rear seat occupants.

[0132] Figures 12 and 13 show perspective views of a vehicle seat 1 in an embodiment (second embodiment) in which the air blower unit 101 is configured as an external unit intended solely for blowing air toward the rear seat occupants.

[0133] As shown in Figures 12 and 13, the blower unit 101 according to the second embodiment includes an intake port 102 (see Figure 12) that opens forward and an exhaust port 103 (see Figure 13) that opens rearward. Air drawn in through the intake port 102 passes through the inside of the blower unit 101 and is discharged rearward through the exhaust port 103. This allows air to be blown towards the rear seat occupants.

[0134] As shown in Figure 13, the air blower unit 101 may be equipped with a pair of fastening parts 104 that can be fastened to each of the pillars 10 of the headrest 8. In addition, as shown in Figure 14, the air blower unit 101 may be equipped with a pair of hooks 105 that can be fastened to the upper end of the seat back 7. The number of hooks 105 provided on the air blower unit 101 is not limited to two; the air blower unit 101 may be equipped with one hook 105, or it may be equipped with three or more hooks 105.

[0135] Figure 15 shows an exploded perspective view illustrating an example of a blower unit 101 configured in this way.

[0136] In the example shown in Figure 15, the blower unit 101 includes a blower 107, a duct 108, an air outlet forming member 109, a control device 110, a switch 111, and a cover member 112.

[0137] The blower 107 according to this embodiment is composed of a centrifugal fan (a so-called Sirocco fan). The blower 107 comprises an impeller (not shown) that rotates around a rotation axis and a casing that houses the impeller.

[0138] The casing comprises a side wall portion 116 facing the impeller in the direction of the rotation axis and equipped with an air intake port 115, and a scroll-shaped portion 117 formed circumferentially along the outer circumference of the impeller.

[0139] The scroll-shaped section 117 is configured to collect air sent from the impeller to the outer circumference. The scroll-shaped section 117 is provided with a discharge port 118 that opens tangentially to the outer circumference of the impeller. The air sent from the impeller flows along the tangential direction to the outer circumference of the impeller and is discharged from the discharge port 118.

[0140] The duct 108 is connected to the discharge port 118. The duct 108 has a first extended portion 121 that extends tangentially from the discharge port 118 to the outer circumference of the impeller and is bent horizontally, and a second extended portion 122 that is continuous with the first extended portion 121 and extends horizontally.

[0141] The first extended portion 121 is shaped like a rectangular tube. Preferably, the bent portion of the first extended portion 121 is smoothly bent to guide the airflow.

[0142] As shown in Figure 16, the second extension 122 has a front wall 122A, a rear wall 122B, an upper wall 122C, a lower wall 122D, and a side wall 122E, and is in the shape of a roughly rectangular parallelepiped extending horizontally. The second extension 122 opens toward the first extension 121 and is connected to the first extension 121 at the opening.

[0143] The rear wall 122B of the second extension 122 is provided with a roughly rectangular outlet 124 for guiding the air that has flowed into the second extension 122 to the outside. An air outlet forming member 109 is connected to this outlet 124.

[0144] The inner bore of the second extension 122 is provided with a curved rib 126 that protrudes from the front wall 122A toward the outlet 124. The curved rib 126 extends vertically along the front wall 122A to alter the airflow from the discharge port 118. In this embodiment, the curved rib 126 curves away from the blower 107 at its base end and then protrudes toward the rear. As a result, the air sent from the blower 107 is well guided toward the rear (i.e., toward the outlet 124) by the side surface of the curved rib 126. Therefore, an airflow can be created within the duct 108 from the outlet of the blower 107 to the air outlet forming member 109, and the flow velocity distribution of the air introduced into the air outlet forming member 109 within the cross-section of the outlet 124 can be made more uniform. In this embodiment, two curved ribs 126 are arranged horizontally side by side in the second extension 122, and the upper edge of each curved rib 126 is connected to the front wall 122A.

[0145] The air outlet forming member 109 comprises a rectangular cylindrical portion 131 extending in the front-rear direction and a plurality of louvers 132 provided in the inner bore of the cylindrical portion 131 (see the enlarged view of Figure 13). The air outlet forming member 109 is connected to the outlet 124 to define the air outlet of the air blowing unit 101. It is preferable that the louvers 132 are rotatably supported relative to the cylindrical portion 131 in order to change the direction of air discharge from the air outlet forming member 109.

[0146] The control device 110 is composed of an electronic control unit (ECU) and controls the drive of the blower 107 in response to the input to the switch 111.

[0147] The cover member 112 has an opening facing forward and includes a housing member 141 that houses the blower 107, the duct 108, the air outlet forming member 109, the control device 110, and the switch 111, and a cap member 142 that seals the opening of the housing member 141.

[0148] As shown in Figure 13, the housing member 141 is provided with an opening 145 into which the rear end portion of the air outlet forming member 109 is fitted, and a switch hole 146 for enabling the operation of the switch 111. Also, as shown in Figure 15, the cap member 142 is provided with a hole 147 for enabling air to flow into the intake port 102.

[0149] The cover member 112 may be directly connected to the upper rear surface of the seat back 7, thereby attaching and fixing the air blower unit 101 to the vehicle seat 1. Alternatively, the cover member 112 may be provided with a latching portion 104 or a hooking portion 105, and the air blower unit 101 may be attached to the vehicle seat 1 by connecting the latching portion 104 or the hooking portion 105 to the upper part of the seat back 7.

[0150] The air blower unit 101 may be installed in the front seats, such as the driver's seat or passenger seat, located behind the dashboard (not shown). In this case, the air blower unit 101 can effectively deliver air from the air vents of the air conditioning unit installed in the dashboard (not shown) to the rear seats. Furthermore, by attaching the air blower unit 101 to the top of the seat back 7, it is possible to effectively deliver air to the upper bodies of rear seat occupants.

[0151] The seat body 3 may also be provided with a storage compartment 151 for housing the blower unit 101. Figures 17(A) and 17(B) show one example configuration in which the seat body 3 is provided with a storage compartment 151. Figure 17(A) shows the blower unit 101 in the storage position where it is housed in the storage compartment 151, and Figure 17(B) shows the blower unit 101 in the deployed position where it is used.

[0152] As shown in Figures 17(A) and 17(B), the storage compartment 151 is composed of recesses that are recessed inward from the left and right sides of the seat back 7 and open outward from the seat. The blower unit 101 is housed in the recesses that make up the storage compartment 151 such that the blower 107 is located on the opening side of the storage compartment 151.

[0153] In some cases, airbag modules 54 are provided on the left and right sides of the seatback 7. In such cases, the storage compartment 151 may be positioned above the airbag module 54, as shown in Figures 17(A) and 17(B).

[0154] As shown in Figure 17(A), when the blower unit 101 is in the storage position, the entire blower unit 101 is housed in a recess that constitutes the storage section 151, and it is preferable that the outer end face of the blower unit 101 on the seat is flush with the left and right outer surfaces of the seat back 7. As shown in Figures 17(A) and 17(B), the blower unit 101 is displaced from the storage position to the deployed position by being pulled out to the outside of the seat.

[0155] When the air blower unit 101 is in the deployed position, the holes 147 of the cap member 142 are located on the left and right outer sides of the seat back 7. In addition, on the rear surface of the seat back 7, when the air blower unit 101 is in the deployed position, there are air holes 152 that extend through to the inside of the storage section 151, overlapping with the opening 145 of the cover member 112. As a result, when the air blower unit 101 is driven, air is drawn in through the holes 147 and blown out towards the rear seats through the opening 145 and the air holes 152.

[0156] Furthermore, in order to facilitate the movement of the blower unit 101, a movable member (not shown) for displacing the blower unit 101 between the deployed position and the stored position may be provided inside the storage section 151. The movable member can be configured, for example, as a slider that slides the blower unit 101 in the seat width direction. In addition, in order to allow the blower unit 101 to be used even when it is in the stored position, the rear surface of the seat back 7 may be provided with a suction hole (not shown) that penetrates in the front-to-back direction in front of the hole 147 of the blower unit 101 in the stored position and reaches the inner hole of the storage section 151, and a discharge hole that penetrates in the front-to-back direction in rear of the opening 145 of the cover member 112 and reaches the inside of the storage section 151.

[0157] This concludes the description of specific embodiments, but the present invention is not limited to the above embodiments and can be broadly modified and implemented.

[0158] 1: Vehicle seat 3: Seat body 6: Seat cushion 7: Seat back 16: Cushion frame 17: Pad member (example of cushion pad) 18: Surface material (example of cushion surface material) 21: Cushion side member 22: Front member (example of cushion cross member) 23: Rear member (example of cushion cross member) 26: Cushion pressure receiving member (example of pressure receiving member) 31: Ventilation passage 35A: Inlet 42: Back frame 44: Surface material 46: Back side member 47: Back upper member 48: Back lower member 53: Back cross member (example of bracket) 61: Blower unit 62: Blower (example of blower) 63: First duct 64: Second duct 65: Air inlet forming section 66: Intake port 67: Outlet 67A : First discharge port (example of a discharge port) 67B : Second discharge port (example of a discharge port) 68 : Air supply port 81 : Back table (example of a table) 83 : Table body 84 : Shaft part 85 : Support part

Claims

1. A vehicle seat comprising: a seat body having a seat back and a seat cushion; a ventilation unit provided on the seat body, wherein a ventilation passage for blowing air onto the occupant is formed inside the seat cushion; an air outlet opening toward the rear is provided on the rear surface of the seat back; and the ventilation unit comprises: a ventilation device having one intake port and two discharge ports; a first duct connecting one of the discharge ports to the ventilation passage; and a second duct connecting the other discharge port to the intake port.

2. The seat body comprises a cushion frame that forms the skeleton of the seat cushion and a back frame connected to the rear of the cushion frame and forming the skeleton of the seat back, and the blower is arranged so that the air intake faces downward and is connected to the lower surface of the cushion frame, as described in claim 1.

3. The seat for a vehicle according to claim 2, wherein the cushion frame comprises a pair of left and right cushion side members, a pair of front and rear cushion cross members connecting the left and right cushion side members, and a pressure receiving member stretched across the front and rear cushion cross members, and the blower is coupled to the lower surface of the pressure receiving member.

4. The seat for a vehicle according to claim 2 or 3, wherein the lower surface of the seat cushion is provided with an inlet for introducing air into the ventilation passage, the blower is positioned behind the inlet, and the first duct extends forward from the blower and is connected to the inlet.

5. The seat for a vehicle according to claim 4, wherein the seat body comprises a cushion pad placed on the upper surface of the cushion frame and a cushion surface material covering at least the upper surface of the cushion pad, and the ventilation passage is provided in the cushion pad.

6. The vehicle seat according to claim 4, wherein the second duct extends rearward from the blower.

7. The seat for a vehicle according to claim 5, wherein the back frame comprises a pair of left and right back side members, a back lower member connecting the lower ends of the back side members, and a back upper member connecting the upper ends of the back side members, and the second duct passes behind the back lower member and extends upward.

8. The seat body comprises a cushion frame that forms the skeleton of the seat cushion, and a back frame connected to the rear of the cushion frame and forming the skeleton of the seat back, wherein the back frame comprises a pair of left and right back side members, a back lower member connecting the lower ends of the back side members, and a back upper member connecting the upper ends of the back side members, wherein the back frame has brackets connected to the back side members at its left and right ends, and an air outlet forming portion that defines the edge of the air outlet is connected to the bracket, and the second duct extends upward and is connected to the air outlet, the vehicle seat according to claim 1.

9. The seat for a vehicle according to claim 8, wherein a back table is provided on the rear surface of the seat back so as to be rotatable about an axis extending in the left-right direction, and the back table is displaced by rotation about the axis to a closed position that closes the air supply port and an open position that opens the air supply port.

10. The vehicle seat according to claim 9, wherein the back table comprises a flat table body and a shaft portion provided on the edge of the table body and extending along the axis, and the air supply port forming portion is provided with a pair of left and right support portions that support the left and right ends of the shaft portion so as to be rotatable about the axis.

11. The vehicle seat according to claim 9, wherein the back table comprises a flat table body and a shaft portion provided on the edge of the table body and extending along the axis, and the bracket is provided with a pair of left and right support portions that support the left and right ends of the shaft portion so as to be rotatable about the axis.

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