Vehicle seats

Abstract

A vehicle seat having a seat cushion and a seat back, comprising: a pair of seat cushion side frames (11); a duct (D) extending from the seat cushion along the rear side of a frame (F1) of the seat cushion toward the seat back to connect an air passage formed in at least one of the seat cushion and the seat back and a duct of a blower; a side frame cover (90) covering at least a portion of the seat cushion side frames (11). The side frame cover (90) has a duct cover portion (92) covering a portion of the duct on the rear side of the seat cushion frame.

Description

[0001] This application is a divisional application of application number 201780087790.3, application date September 13, 2017, and invention name “Vehicle Seat”. Technical Field

[0002] The present invention relates to vehicle seats. Background Art

[0003] In the prior art, a vehicle seat includes a seat cushion and a seat back, an air outlet and an air passage are formed in the seat back, a blower is installed on the bottom surface of the seat cushion, and a pipe is used to connect the blower and the air passage of the seat back, and the blower blows conditioned air to the air outlet via the air passage and the pipe. Such a vehicle seat is known (Patent Document 1).

[0004] Another vehicle seat includes an air blower disposed at the lower portion of a seat cushion, a first duct connecting the air blower and an air passage of the seat cushion, and a second duct connecting the air blower and an air passage of a seat back. This vehicle seat is also known (Patent Document 2). In this technology, the front end portion of the duct is inserted into a through hole formed in a polyurethane pad of a seat cushion or a seat back, and is connected to the seat cushion or the seat back in this way.

[0005] There is another known car seat in which the polyurethane pad of the seat cushion or the seat back is provided with a guide channel for blowing the air from the air supply unit to the inside of the air seat, and an air distribution channel for distributing the air from the guide channel to the seat surface, and the conditioned air entering the air distribution channel from the guide channel is blown out from the surface of the seat (Patent Document 3).

[0006] Patent Document 1: JP 2009-023477 A

[0007] Patent Document 2: JP 2016-164028 A

[0008] Patent Document 3: JP 2000-152849 A Summary of the invention

[0009] According to the technology of Patent Document 1, since the duct is exposed at the rear side of the seat pad, the feet of a passenger sitting on the rear seat are likely to collide with the duct.

[0010] It can also be said that since the feet of the passengers sitting on the back seat are likely to collide with the duct of the air passage connecting the blower and the seat back in the technology of Patent Document 1, a structure is desired to reduce the possibility of the feet of the passengers sitting on the back seat hitting the duct. For such a structure with the duct, it is also desired that the seat can be made compact.

[0011] In the technology disclosed in Patent Document 2, a plate-shaped pressure-bearing component for bearing the load from the occupant is arranged under the polyurethane pad of the seat cushion or behind the polyurethane pad of the seat back, and the back side of the cushion member such as the polyurethane pad is covered by the pressure-bearing component. For this structure, it is also desired to make the air passages and pipes in the cushion member easily connectable.

[0012] In the technology of Patent Document 3, in order to allow air to pass through the seat surface over a wide range and blow out air for air conditioning, a plurality of air distribution channels are arranged to extend radially from the introduction passage. However, such a structure will weaken the flow of air in each air distribution channel, making it impossible for the air to flow well in the cushion, resulting in the possibility that the force of the air blown out from the seat surface will be weakened.

[0013] Furthermore, for an air passage provided in a cushion of a seat for air flow, a structure capable of well flowing air is required.

[0014] An object of the present invention is to provide a vehicle seat capable of preventing the feet of an occupant sitting in a rear seat from hitting a pipe.

[0015] Furthermore, the invention aims to reduce the number of components of a vehicle seat.

[0016] Furthermore, the present invention aims to suppress deformation or other harmful effects of the pipeline.

[0017] Furthermore, the invention aims to increase the rigidity of the pipe.

[0018] Furthermore, the present invention aims to ensure the flow rate of the air flowing in the duct.

[0019] Furthermore, the present invention aims to make the vehicle seat compact.

[0020] Furthermore, the present invention aims to suppress displacement of the pipeline.

[0021] Furthermore, the present invention aims to suppress interference between pipes and other components.

[0022] Furthermore, the present invention aims to reduce adverse effects caused by contact between the pipeline and other components.

[0023] Furthermore, the present invention aims to facilitate the connection of air passages and ducts.

[0024] In addition, the present invention aims to enable air to flow smoothly through the duct.

[0025] Furthermore, the present invention is intended to protect the portion where the pipe and the mat member are connected.

[0026] Furthermore, the present invention is directed to providing satisfactory air flow within the cushion, allowing air to penetrate a large area of ​​the seat surface.

[0027] Another object of the present invention is to effectively arrange ventilation holes that communicate with air passages.

[0028] Furthermore, the invention aims to improve the seating comfort.

[0029] Furthermore, the present invention aims to suppress excessive deformation of the pad having the air channels.

[0030] Another object of the present invention is to facilitate the formation of a pad having air channels and vents.

[0031] In addition, the present invention aims to make the air flow smoothly.

[0032] Furthermore, the present invention aims to increase the cooling sensation.

[0033] Another object of the present invention is to facilitate the formation of a cushion having air channels.

[0034] The present invention for achieving the above-mentioned purpose is a vehicle seat including a seat cushion and a seat back, the vehicle seat including: a pair of side frames; a duct extending from the seat cushion along the rear side of the frame of the seat cushion toward the seat back and connecting an air passage and a blower, the air passage being formed in at least one of the seat cushion and the seat back; and a side frame cover covering at least a portion of the side frame, wherein the side frame cover has a duct cover portion covering a portion of the duct on the rear side of the frame of the seat cushion.

[0035] According to such a structure, the duct at the rear side of the seat pad can be protected, and therefore the duct will not be hit by the feet of the passenger sitting on the rear seat. In addition, since there is no need to separately set a cover for the side frame and the duct, the number of components for the vehicle seat is reduced.

[0036] In the above-mentioned vehicle seat, the duct includes a soft portion having a deformability at a rear side of a frame of the seat pad, wherein the duct cover is configured to cover at least a portion of the soft portion.

[0037] According to this, it is possible to prevent the feet of the occupant in the rear seat from hitting the soft portion of the duct.

[0038] The vehicle seat described above includes a reclining mechanism for supporting the seat back so as to be rotatable relative to the seat cushion, wherein the side frame cover includes a reclining mechanism cover portion for covering the reclining mechanism.

[0039] According to such a structure, the side frame cover can be configured not only to protect the duct but also to have a function capable of providing a protection reclining mechanism, so the number of components of the vehicle seat can be further reduced.

[0040] In the above vehicle seat, the duct includes a narrow portion provided at a rear side of a frame of the seat cushion, and a dimension in a lateral direction of the narrow portion is smaller than a dimension perpendicular to the lateral direction.

[0041] According to such a structure, the narrow portion can reduce the possibility of the risk of the foot of the passenger sitting in the back seat hitting the narrow portion of the duct because of its small size in the lateral direction. In addition, the narrow portion has a stronger ability to withstand the load in the direction perpendicular to the lateral direction in terms of shape, and even if the narrow portion is hit by the foot of the passenger sitting in the back seat, the deformation or other adverse effects of the duct can be effectively suppressed.

[0042] In the above-mentioned vehicle seat, the pipe includes a wide portion, which is located below the seat cushion and extends in the front-to-rear direction, and the dimension of the wide portion in the lateral direction is greater than the dimension in the up-down direction, and a connecting portion connecting the wide portion and the narrow portion, and the lateral dimension of the connecting portion between the narrow portion and the wide portion is larger in the lateral direction as it is closer to the wide portion, and smaller in the up-down direction.

[0043] According to such a structure, the cross-sectional shape of the duct gradually changes from the narrow portion toward the wide portion, and the rigidity of the duct is more effectively improved compared with a structure in which the cross-sectional shape does not change. In addition, the reduction in the flow path cross-sectional area in the connection portion of the duct can be suppressed, so the flow rate of air flowing in the duct can be ensured. In addition, the wide portion provided below the seat cushion is smaller in the vertical dimension, and can be made thinner in the vertical dimension, so that the vehicle seat can be made compact in the vertical dimension.

[0044] In the above vehicle seat, the duct cover has a protrusion that protrudes toward the duct and is engageable with the duct.

[0045] According to such a configuration, the position of the duct is adjusted by the engagement between the duct and the protruding portion of the duct cover, so that the movement of the duct can be suppressed.

[0046] In the above-mentioned vehicle seat, the pair of side frames include a pair of seat cushion side frames constituting left and right frames of the seat cushion, the frame of the seat cushion includes, the pair of seat cushion side frames, a rear frame for connecting the rear parts of the pair of seat cushion side frames, the pipe has a bellows portion, which serves as a soft portion on the rear side of the rear frame, and the bellows portion is located above the lower end of the rear frame.

[0047] According to such a structure, the bellows portion of the duct is less likely to be hit by the feet of the occupant sitting on the rear seat than in the case of the bellows portion located below the lower end of the rear frame.

[0048] In the above-mentioned vehicle seat, a pair of side frames include a pair of seat cushion side frames constituting left and right frames of the seat cushion. In addition to the pair of seat cushion side frames, the frame of the seat cushion also includes a front frame for connecting the front parts of the pair of seat cushion side frames, and a rear frame for connecting the rear parts of the pair of seat cushion side frames. The vehicle seat also includes a cable component laid out for connecting the front frame and the rear frame. The cable component includes a hook portion hooked on the rear frame, and a portion of the pipe extends along the rear side of the rear frame and is located at a different position from the hook portion in the lateral direction.

[0049] According to such a structure, interference between the duct and the cable member can be suppressed.

[0050] Wherein, the vehicle seat is provided with a sensor arranged below the pair of side frames,

[0051] The duct is located closer to the other of the pair of side frames than one of the pair of side frames in the lateral direction.

[0052] According to such a structure, interference between the pipe and the sensor and with electric wires and / or other members extending from the sensor can be suppressed.

[0053] In the above vehicle seat, the duct includes a retracted portion located on the frame rear side of the seat cushion, the retracted portion is located at a position inside the pair of side frames in the transverse direction, and the retracted portion is located closer to one of the side frames than the transverse direction center between the pair of side frames.

[0054] According to such a structure, since the retracted portion of the duct is located at a position of one of the side frames moved to the rear of the seat cushion, it can be prevented from being hit by the feet of the occupant sitting on the rear seat. In addition, since the retracted portion is arranged at a position inward in the lateral direction of the pair of side frames, the lateral dimension of the vehicle seat is more compact than when the retracted portion is arranged outward in the lateral direction of the pair of side frames.

[0055] In the above vehicle seat, the retracted portion extends obliquely in a downward and forward direction.

[0056] According to such a structure, since the retracted portion of the duct at the rear portion of the seat cushion is located away from the feet of the occupant sitting on the rear seat, the duct can be prevented from being hit by the feet of the occupant sitting on the rear seat.

[0057] In the above-mentioned vehicle seat, the pair of side frames include a pair of seat cushion side frames constituting left and right frames of the seat cushion, wherein the vehicle seat also includes a support member arranged between the pair of seat cushion side frames to bear the load from the occupant, and the pipe has a lower inclined portion, which is arranged below the support member and extends obliquely in a rearward and downward direction.

[0058] According to such a structure, interference between the duct and the supporting member can be suppressed.

[0059] In the above vehicle seat, the duct includes a wide portion that is located below the seat cushion and extends in the front-rear direction, and a dimension of the wide portion in the lateral direction is larger than a dimension thereof in the up-down direction.

[0060] According to such a structure, the wide portion provided under the seat pad has a small vertical dimension, so it can be made thinner in the vertical direction. This makes the vertical dimension of the vehicle seat compact.

[0061] In the above-mentioned vehicle seat, the pair of side frames include a pair of seat cushion side frames constituting left and right frames of the seat cushion, and the vehicle seat also includes a support member arranged between the pair of seat cushion side frames to bear the load from the occupant, and the wide portion is arranged below the support member and is located at a position closer to one of the side frames than the center in the lateral direction between the pair of side frames.

[0062] According to such a structure, even if the middle portion of the seat cushion is recessed more than the left and right side portions of the seat cushion due to the load from the occupant being borne by the support member, the wide portion is moved to the position of one of the side frames, so that interference between the duct and the support member can be suppressed.

[0063] In the above-mentioned vehicle seat, the retracted portion includes a narrow portion having a dimension in the lateral direction smaller than a dimension perpendicular to the lateral direction, and the pipe includes a connecting portion connecting the wide portion and the narrow portion, and the lateral dimension of the connecting portion between the narrow portion and the wide portion is larger in the lateral direction as it is closer to the wide portion, and smaller in the up and down direction.

[0064] According to such a structure, the cross-sectional shape of the duct gradually changes from the narrow part to the wide part, which significantly improves the rigidity of the duct compared to a structure in which the cross-sectional shape does not change. In addition, since the reduction of the flow path cross-sectional area in the connection part of the duct can be suppressed, the flow rate of air flowing in the duct can be ensured. Moreover, the narrow part has a stronger ability to withstand loads from a direction perpendicular to the lateral direction in terms of shape, and even if the narrow part is hit by the feet of a passenger sitting in the back seat, the deformation or other adverse effects of the duct can be effectively suppressed.

[0065] The vehicle seat includes a support member disposed between a pair of side frames for bearing a load from an occupant, wherein the duct includes a portion located on a side opposite to the occupant side of the support member, wherein the support member includes a plurality of cable members arranged in a row and a resin member connecting the cable members, and the resin member is disposed so as to overlap with the duct when viewed from the occupant side.

[0066] According to such a structure, even when the supporting member is recessed and interferes with the pipe, the resin member contacts the pipe first; therefore, adverse effects that may be caused by the contact between the pipe and the supporting member can be reduced, for example, noise and / or vibration generated during contact can be reduced.

[0067] In the above-mentioned vehicle seat, the duct includes a lower tube portion located below the seat cushion, and the lower tube portion includes: a first portion extending in the front-to-rear direction, the first portion having a front end connected to the blower; a second portion extending outward in the lateral direction from the rear end of the first portion obliquely rearward; a third portion extending rearward from the rear end of the second portion; and a branch portion extending upward from the third portion and connected to an air channel formed in the seat cushion.

[0068] According to such a structure, the branch pipe portion can be provided at a position not overlapping with any member located in the seat pad (for example, the cable member), and thus the duct and the air passage formed in the seat pad can be easily connected.

[0069] In the above-mentioned vehicle seat, the lower tube portion includes: a fourth portion extending obliquely rearwardly from the rear end of the third portion and outwardly in the lateral direction; and a fifth portion extending rearwardly from the rear end of the fourth portion.

[0070] According to such a structure, since the duct can be arranged to gradually change its direction toward one of the side frames, a sudden change in the flow path can be suppressed so that the air can smoothly pass through the duct.

[0071] The above-mentioned vehicle seat includes: a plate-shaped pressure-bearing component for bearing the load from the occupant; a cushion component for covering the occupant side of the pressure-bearing component, wherein an air channel is formed in the cushion component, the pipe is connected to the air channel from the side opposite to the occupant side of the cushion component, and the pressure-bearing component has an opening for allowing the pipe to pass through.

[0072] According to such a structure, the duct is connected to the air passage formed in the cushion member through the opening of the pressure receiving member, and the duct can be easily connected to the air passage of the cushion member even if a plate-like pressure receiving member is present.

[0073] The vehicle seat includes a first flat portion, which is disposed on the opposite side of the connecting frame to the passenger side, and has a dimension of the first flat portion facing the connecting frame that is smaller than a dimension in a direction perpendicular thereto.

[0074] According to such a structure, the first flat portion can be thinned in the direction facing the connection frame, so the vehicle seat can be made compact in the direction facing the connection frame. In addition, since a gap can be ensured between the first flat portion and the connection frame while achieving compactness, interference between the duct and the connection frame can be suppressed.

[0075] The above-mentioned vehicle seat may be provided with a cover member that covers a portion of the duct connected to the air passage from a side opposite to an occupant's side.

[0076] According to such a structure, the portion where the duct and the cushion member are connected can be protected by the cover member.

[0077] The above-mentioned vehicle seat may include an S spring installed between the pair of side frames, and the opening is provided at a position not overlapping with the S spring when viewed from the passenger side.

[0078] According to such a structure, since the duct can be easily passed through the opening of the pressure receiving member, the duct can be easily connected to the air passage of the cushion member.

[0079] The vehicle seat may include an S spring installed between the pair of side frames, and the pipe includes a second flat portion arranged on the side of the S spring opposite to the passenger side, and the dimension of the second flat portion facing the S spring is smaller than the dimension in a direction perpendicular to the S spring.

[0080] According to such a structure, since the second flat portion can be thinned in the direction facing the S spring, the vehicle seat can be made compact in the direction facing the S spring. In addition, while ensuring compactness, a gap can be ensured between the second flat portion and the S spring, thereby suppressing interference between the pipe and the S spring.

[0081] In which, the vehicle seat is provided with a cable component, connecting the pressure-bearing component to the frame of the seat, the cable component includes a pair of extensions extending in a predetermined direction and arranged side by side with each other in a direction perpendicular to the predetermined direction, and is located at a position where the cable component overlaps with the pressure-bearing component when viewed from the passenger side, and the opening is located between the pair of extensions.

[0082] Optionally, in the above-mentioned vehicle seat, the cable member includes a frame that connects the pressure-bearing member to the seat, the cable member includes an extension portion that extends in a predetermined direction and is located at a position where the cable member overlaps with the pressure-bearing member when viewed from the passenger side, and the opening is arranged on the outside of the extension portion in a direction perpendicular to the predetermined direction.

[0083] The vehicle seat includes a cushion, the cushion including an air channel and a plurality of first ventilation holes, the first ventilation holes extending from an occupant-side surface to the air channel, the air channel including a first air channel, one end of which is connected to the blower when viewed from the occupant side, a second air channel extending from the other end of the first air channel in a direction different from the direction in which the first air channel extends, and a third air channel extending from an end of the second air channel opposite to an end of the second air channel connected to the first air channel toward one end of the first air channel, wherein the first ventilation holes include at least one first hole communicating with the first air channel and at least one second hole communicating with the third air channel.

[0084] According to such a structure, since the first ventilation hole includes at least one first hole connected to the first air passage and at least one second hole connected to the third air passage, air can be distributed over a wide area of ​​the seat surface. On the other hand, the first air passage, the second air passage, and the third air passage can form a continuous flow passage, so the number of flow passages connected to the blower can be reduced. As a result, the weakening of the air flow in the air passage can be suppressed, so that the air can flow satisfactorily in the cushion.

[0085] In the above vehicle seat, the first holes are formed at multiple positions along the first air passage, wherein the second holes are formed at multiple positions along the third air passage, wherein a row of first holes and a row of second holes are arranged side by side with each other in an extending direction of the second air passage.

[0086] According to such a structure, air can pass through a wider area of ​​the seat surface, and the plurality of first ventilation holes can be efficiently arranged.

[0087] In the above-mentioned vehicle seat, the first air channel extends in a direction intersecting the lateral direction, the second air channel extends laterally inward from the other end of the first air channel, wherein the third air channel extends in a direction intersecting the lateral direction from the end opposite to the end where the second air channel is connected to the first air channel, and two flow channels consisting of the first air channel, the second air channel and the third air channel are formed in a symmetrical manner on the left and right sides.

[0088] According to such a structure, the portion of the pad having no air passage formed therein can allow the occupant to maintain a good sense of balance, and the seating comfort can be improved even if the air passage includes the first air passage, the second air passage, and the third air passage.

[0089] The vehicle seat may include a cushion support member on an opposite side of the cushion from a passenger side for supporting the cushion, the cushion support member overlapping at least a portion of the first, second and third air passages when viewed from the passenger side.

[0090] According to such a structure, even if portions of the first air passage, the second air passage, and the third air passage formed in the mat are easily deformed, these portions can be supported by the mat supporting member, preventing the mat from being excessively deformed.

[0091] In the above-mentioned vehicle seat, the pad supporting member may be plate-shaped.

[0092] According to such a structure, the portion of the mat in which the first air passage, the second air passage, and the third air passage are formed can be supported by the surface of the plate-like mat support member, and excessive deformation of the mat can be suppressed.

[0093] In the above-mentioned vehicle seat, the cushion has a second ventilation hole, which is connected to the air channel from the surface on the opposite side of the occupant side, and the air channel includes a fourth air channel, which extends laterally and connects one end of the first air channel on the left side and one end of the first air channel on the right side, and a fifth air channel, which connects the second ventilation hole and the fourth air channel, the second ventilation hole is located at a position offset to the left or right from the lateral center position of the cushion, and the fifth air channel extends obliquely from the second ventilation hole toward the lateral center position of the cushion and is connected to the fourth air channel.

[0094] According to such a structure, since there is no sharp bend in the fifth air passage connecting the second ventilation hole and the fourth air passage, air can flow better from the second ventilation hole to the fourth air passage.

[0095] In the above vehicle seat, the pad includes a first member formed with a groove for constituting an air passage, and a second member having the first ventilation hole and provided overlappingly on a surface of the first member on the passenger side.

[0096] According to such a structure, the pad can be formed more easily compared to an alternative configuration in which the air passage and the pad having the first ventilation holes connected to the air passage are integrally formed.

[0097] In the above vehicle seat, the first member includes a first member main body and a groove forming member provided in an overlapping manner on a surface of the first member main body on the passenger side, the groove forming member having a groove penetrating therethrough.

[0098] According to such a structure, the first member having the air passages including the first, second and third air passages provided therein can be easily formed, and thus the pad can be formed more easily.

[0099] The vehicle seat includes a cushion having the air passage and a first ventilation hole, wherein the first ventilation hole is connected to the air passage from a surface of the cushion on the passenger side, and the air passage includes a first air passage extending along the surface of the cushion on the passenger side, wherein the first air passage has an opposite surface facing the first ventilation hole, and the opposite surface is inclined when viewed from the passenger side, and the portion closer to the edge of the cushion is closer to the passenger side.

[0100] According to such a structure, since the air passing through the first ventilation hole can flow along the slope of the opposing surface, the air can flow smoothly.

[0101] In the above vehicle seat, one end of the first air passage is closed, and the opposing surface is provided at an end portion of the first air passage close to the one end.

[0102] According to such a structure, compared with a case where the opposing surface is provided in the middle of the first air passage, it is possible to more effectively utilize the slope of the opposing surface to flow the air. This allows the air to flow better.

[0103] In the above-mentioned vehicle seat, the cushion includes a middle part, and a pair of side parts arranged on the left and right sides of the middle part, and the side parts bulge toward the passenger side compared with the middle part, and the first ventilation hole is arranged at the end of the middle part in the lateral direction, and air can be blown from the first ventilation hole.

[0104] According to such a structure, the air that flows vigorously along the slope of the opposing surface can be blown out from the first ventilation hole to pass over the body of the occupant, and the perceived coolness can be improved.

[0105] In the above-mentioned vehicle seat, the cushion has a second ventilation hole, which is connected to the air channel from the surface of the side opposite to the passenger side, and the air channel includes a second air channel connecting the first air channel and the second ventilation hole, and the second air channel extends from the connection position to the first air channel in one of the vertical directions perpendicular to the lateral direction, and the first air channel extends obliquely relative to the vertical direction and deviates in the direction opposite to one of the vertical directions as the distance from the second air channel toward the lateral outer end of the cushion increases.

[0106] According to such a structure, the air flowing in from the second ventilation hole can smoothly flow from the second air passage into the first air passage.

[0107] In the above-mentioned vehicle seat, the pad includes a first member having a groove therein for constituting an air passage, and a second member having a first ventilation hole formed therein and overlappingly disposed on a surface on the passenger side of the first member, the opposing surface being formed in the first member.

[0108] According to such a structure, it is possible to more easily form a pad having an air passage in which inclined opposing surfaces are formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0109] Figure 1 It is a view of a car seat as a vehicle seat according to the embodiment.

[0110] Figure 2 It is a cross-sectional view of a car seat.

[0111] Figure 3 2 is a view showing a seat frame, a supporting member and a pressure member.

[0112] Figure 4 This is a view of the seat cushion from above.

[0113] Figure 5 It is a front view of the backrest frame and pressure-bearing members.

[0114] Figure 6 is a view of the pipeline.

[0115] Figure 7 It is a bottom view of the cushion frame, support members, blower and ducting.

[0116] Figure 8 It is a rear view of the backrest frame, pressure-bearing members and piping.

[0117] Fig. 9 It is a rear view of the backrest frame with the cover member installed.

[0118] Fig.10 It is a perspective view of the side frame cover viewed from the inside in the lateral direction.

[0119] Fig.11 It is a perspective view of the side frame cover viewed from the outside in the lateral direction.

[0120] Fig.12 is a view of the cushion construction.

[0121] Fig.13 This is a view of the cushion from above.

[0122] Fig.14 is a view showing the configuration of a back pad.

[0123] Fig.15 This is a view of the back pad from the front.

[0124] Fig.16 is along Fig.15 Cross-sectional view of line XX.

[0125] Fig.17 It is a view of a modified example of the side frame cover.

[0126] Fig.18 It is a view of a modified example of a pressure-bearing member and a pipe. DETAILED DESCRIPTION

[0127] Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings. In this specification, front / rear, left / right, up / down and up / down represent front / rear, left / right and up / down defined from the line of sight of a person sitting on a seat.

[0128] like Figure 1 As shown, the vehicle seat of this embodiment is a vehicle seat S installed in a vehicle, and includes a seat cushion S1 and a seat back S2.

[0129] like Figure 2 As shown in FIG. 1 , the automobile seat S is composed of a seat frame F (refer to FIG. 1 ). Figure 3 ) is covered with a pad P made of polyurethane foam or the like and fabrics U1, U2 made of fabric, leather or the like. This will be described in detail later. Air channels A1, A2 and first ventilation holes H1, H2 are formed in the pad P. The first ventilation holes H1, H2 connect the surface on the passenger side with the air channels A1, A2. In the car seat S, the air from the blower 70 passes through the duct D and the air channels A1, A2 and is blown from the first ventilation holes H1, H2 to the passenger sitting on the seat.

[0130] like Figure 3As shown, the seat frame F includes a cushion frame F1 constituting a frame of a seat cushion S1 and a backrest frame F2 constituting a frame of a seat backrest S2. The backrest frame F2 is connected to the cushion frame F1 via a tilt mechanism RL. The tilt mechanism RL is a conventional structure, and supports the seat backrest S2 so that it can rotate relative to the seat cushion S1. In the present embodiment, for the seat cushion S1, the upper side of the seat cushion S1 corresponds to the "passenger side", and the lower side corresponds to the "opposite side to the passenger side". For the seat backrest S2, the front side and the rear side of the seat backrest S2 when it is not laid down are maintained by the tilt mechanism RL, and correspond to the "passenger side" and the "opposite side to the passenger side", respectively.

[0131] The cushion frame F1 includes a pair of left and right side frames 11, a pan frame 12 as a front frame, a rear pipe 13 as a rear frame, and a front pipe 14 as a connecting pipe (see Figure 4 ).

[0132] The pair of cushion side frames 11 are components constituting left and right frames of the seat cushion S1, and are arranged to oppose and be spaced apart from each other in the lateral direction. The cushion side frames 11 are each made of a metal plate and formed into a shape that is long in the front-rear direction.

[0133] The tray frame 12 is a plate-like member that connects the front portions of the pair of pad side frames 11 to each other, and is made of a metal plate. The left and right end portions of the tray frame 12 are connected to the front end portions of the pad side frames 11 by welding.

[0134] like Figure 4 As shown, the rear pipe 13 and the front pipe 14, each made of a metal pipe material, are disposed separately from each other in the front-rear direction and connected to the pair of cushion side frames 11. More specifically, the rear pipe 13 is disposed behind the pan frame 12, separated from the pan frame 12, and connected to the rear portions of the pair of cushion side frames 11. The front pipe 14 is disposed in front of the rear pipe 13, separated from the rear pipe 13, and connected to the front portions of the pair of cushion side frames 11. The front pipe 14 is disposed below the pan frame 12.

[0135] The support member 30 is provided between the pair of cushion side frames 11 of the cushion frame F1. The support member 30 is a pressure-bearing member that bears the weight of an occupant sitting on the seat, and includes a plurality of cable members 31 and a resin member 32.

[0136] The cable members 31 are each made of a metal wire material, and are disposed between the tray frame 12 and the rear tube 13. Each of the cable members 31 mainly includes a first extending portion 31A, a second extending portion 31B, and a rear hook portion 31C as a hook portion.

[0137] The first extension 31A extends in the front-to-rear direction while being alternately bent in the left-to-right direction. The front end of the first extension 31A has a front hook 31D hooked on a hook anchor 12H formed on the tray frame 12. The front end portion of the first extension 31 including the front hook 31D is covered with a resin for suppressing noise generated by contact between the cable member 31 (support member 30) and the tray frame 12.

[0138] The second extension portion 31B extends obliquely rearward and upward from the rear end of the first extension portion 31 .

[0139] The rear hook portion 31C is a portion hooked on the rear pipe 13, extends from the upper end of the second extension portion 31B, and is bent substantially into a circular shape.

[0140] The supporting member 30 includes four cable members 31 , and the four cable members 31 are arranged side by side in the lateral direction.

[0141] The resin member 32 is a member connected to the cable member 31. The resin member 32 is made of resin, the entire circumference of a part of the cable member 31 is covered by the resin member 32, and is integrally molded with the cable member 31 by insert molding or the like. The resin member 32 includes a first resin member 32A, a second resin member 32B, a third resin member 32C, a fourth resin member 32D, and a fifth resin member 32E.

[0142] The first resin member 32A connects the middle portions of the four cable members 31 in the front-rear direction.

[0143] The second resin member 32B is arranged behind the first resin member 32A, connecting the middle portions in the front-rear direction of the two cable members 31 located in the middle in the transverse direction.

[0144] The third resin member 32C connects the leftward and rightward extending portions of the first extending portion 31A of the cable member 31 located on the left and right sides of the second resin member 32B and the portions of the ends of the leftward and rightward extending portions to the rear.

[0145] The resin members 32A to 32C are formed with through holes (not numbered) penetrating vertically and substantially in a rectangular shape. Clips for holding a wire harness or the like are mounted in the through holes, and the wire harness or other members can be held on the support member 30 .

[0146] The fourth resin member 32D is provided behind the resin components 32B and 32C, and connects the rear end portions of the first extending portions 31A of the four cable members 31 .

[0147] The fifth resin member 32E connects the rear end portions of two adjacent cable members 31, specifically, the rear hooks 31C together. The fifth resin member 32E covers the rear hooks 31C, thereby suppressing noise that may be generated by contact between the support member 30 and the rear pipe 13.

[0148] like Figure 5 As shown, the backrest frame F2 includes a pair of left and right metal plate frames 22 , a pipe frame 23 , and a lower frame 24 as a connecting frame, and a bridge frame 25 .

[0149] A pair of metal plate frames 22 are arranged to be opposed to each other in the lateral direction and spaced apart from each other. Each metal plate frame 22 is made of a metal plate and is formed in a long shape in the up-down direction.

[0150] The pipe frame 23 is made of a metal pipe material, and includes a pair of left and right upper side frames 23A and an upper frame 23B extending substantially in the up-down direction, and the upper frame 23B extends to connect the upper end of the upper frame 23A. The pair of upper side frames 23A, whose lower portions are welded to the upper portions of the metal plate frames 22, constitute a pair of back side frames 21 together with the pair of metal plate frames 22. The pair of back side frames 21 constitute the left and right frames of the seat back S2. In the present embodiment, the "pair of side frames" includes a pair of back side frames 21 and a pair of cushion side frames 11 of the cushion frame F1.

[0151] The lower frame 24 is a member that connects the lower parts of the pair of back frames 21 to each other and is made of a metal plate. The left and right ends of the lower frame 24 are connected to the left and right inwardly extending rear ends of the metal plate frame 22 constituting the back frame 21 by welding.

[0152] The bridge frame 25 is a member that connects the upper portions of the pair of back frames 21 to each other, and is made of a metal plate. The left and right ends of the bridge frame 25 are connected to the upper portion of the upper frame 23A constituting the back frame 21 by welding or the like. The bridge frame 25 has a lower extension 25A extending forward at the lower end, and has support holes 25B penetrating the upper and lower sides at the left and right ends of the lower extension 25A (see FIG. Figure 3 ) for insertion of a cable member 60 to be described below.

[0153] The S spring 40, the pressure receiving member 50 and the cable member 60 are provided between the pair of back side frames 21 of the back frame F2.

[0154] The S spring 40 is formed by alternately bending a metal wire in the upward and downward directions. The S spring 40 is arranged above the lower frame 24 and installed between the pair of back side frames 21. More specifically, the left and right ends of the S spring 40 are inserted from above into the spring engaging portion 22A provided at the lower portion of the metal plate frame 22, and in this way, it is connected between the pair of back side frames 21.

[0155] The pressure-bearing member 50 is a plate-like member that bears the weight of the occupant sitting on the seat and is made of resin or the like. The pressure-bearing member 50 faces the back of the occupant. In addition, the lower end of the pressure-bearing member 50 is arranged on the front side of the S spring 40. The pressure-bearing member 50 has an opening 50A that penetrates front and back. The opening 50A is a hole through which the pipe D can pass, and is formed into a substantially rectangular shape that is longer in the lateral direction. The opening 50A is arranged in the middle part in the lateral direction of the lower part of the pressure-bearing member 50. Specifically, the opening 50A is arranged between a pair of extensions 61 described later. In addition, when viewed from the front side, the opening 50A is arranged at a position that does not overlap with the S spring 40. Specifically, the opening 50A is arranged above the S spring 40.

[0156] The cable member 60 is a member for connecting the pressure receiving member 50 to the back frame F2 , and mainly includes a pair of left and right extending portions 61 , an inclined portion 62 , an upper connecting portion 63 , and a lower connecting portion 64 .

[0157] The extending portions 61 extend in the up-down direction (a predetermined direction, a direction perpendicular to the lateral direction) and are arranged side by side with each other in the lateral direction (a direction perpendicular to the predetermined direction).

[0158] The inclined portion 62 extends obliquely from the upper end of the extending portion 61 in a laterally outward and upward direction.

[0159] The upper connection portion 63 extends upward from the upper end of the inclined portion 62 .

[0160] The lower connecting portion 64 connects a pair of left and right extensions 61, the inclined portion 62 and the upper connecting portion 63. Specifically, the lower connecting portion 64 includes a lower end portion extending in the lateral direction, and extending upward from the left and right ends of the lower end portion; the upper extending portion is bent inwardly in the lateral direction and extends to the lower end of the extension portion 61 to connect therewith.

[0161] The cable member 60 is connected to the backrest frame F2, the lower connecting portion 64 is held on the front side of the lower frame 24, and the upper connecting portion 63 is inserted into the support hole 25B formed in the lower extension portion 25A of the bridge frame 25 (see FIG. Figure 3 The pressure-bearing member 50 is disposed in front of a pair of extensions 61 of the cable member 60, and is fastened to the extensions 61 by tying straps (not shown), and is connected to the backrest frame F2 via the cable member 60. The pair of extensions 61 are disposed at positions overlapping with the pressure-bearing member 50 when viewed from the front.

[0162] like Figure 2 As shown, the vehicle seat S includes a blower 70 and a duct D.

[0163] The blower 70 is, for example, a sirocco fan, and is disposed below the tray frame 12. More specifically, the blower 70 is mounted to the tray frame via a bracket 71.

[0164] The duct D is a member connecting the blower 70 to the air passages A1, A2 formed in the pad P of the seat cushion S1 and the seat back S2, and extends from below the seat cushion S1 along the rear side of the cushion frame F1 toward the seat back S2. Figure 6 As shown, the pipe D has a first pipe D1 and a second pipe D2 connected to the rear end of the first pipe D1. The first pipe D1 mainly includes a lower pipe portion 110, a connecting portion 120 and a first narrow portion 131, and the second pipe D2 mainly includes a second narrow portion 132, a bellows portion 140 as a soft portion, a first flat portion 150, a second flat portion 160 and a rear connecting portion 170. In this embodiment, the first narrow portion 131 and the second narrow portion 132 correspond to the "narrow portion".

[0165] As in Figure 7 , the lower tube portion 110 is disposed below the seat cushion S1, more specifically, below the support member 30, and extends substantially in the front-rear direction. The lower tube portion 110 has a blower connection portion 111 as a first portion, a second portion 112, a third portion 113, a fourth portion 114, a wide portion 115 as a fifth portion, and a cushion connection portion 116 as a branch tube portion (see also Figure 6 ).

[0166] The blower connection portion 111 is a portion whose front end is connected to the blower 70 and extends in the front-rear direction.

[0167] The second portion 112 extends obliquely rearward from the rear end of the blower connecting portion 111 to the outside in the lateral direction.

[0168] The third portion 113 extends rearward from a rear end of the second portion 112 .

[0169] In this embodiment, in the second portion 112, the farther away from the rear end of the blower connecting portion 111, the larger the transverse dimension is, and the transverse dimension of the third portion 113 is larger than the transverse dimension of the blower connecting portion.

[0170] like Figure 6 As shown, the cushion connection portion 116 is a portion connected to the air passage A1 formed in the seat cushion S1, and extends upward from the front end of the third portion 113. The cushion connection portion 116 has a bellows portion (not numbered), has a deformable capability, and is retractable in the up and down directions. Figure 4As shown in FIG. 1 , the duct D is connected to the cushion P1 through the cushion connection portion 116, which passes through the U-shaped portion on the second cable member 31 adjacent to the rightmost cable member 31 and is inserted into the air passage A1 from below the cushion P1, which will be described below. Figure 7 ) extends from the third portion 113 at a position offset to the right, so in this embodiment, the cushion connection portion 116 can be provided at a position not covering any member such as the cable member 31. Thus, the duct D and the air passage A1 formed in the seat cushion S1 can be easily connected.

[0171] In addition, in this embodiment, since the lateral dimension of the third portion 113 is larger than the lateral dimension of the blower connecting portion 111 (refer to Figure 7 ), the lateral dimension of the cushion connection portion 116 extending from the third portion 113 can be larger. Therefore, a sufficient flow path cross-sectional area of ​​the cushion connection portion 116 can be ensured, so that air can flow better between the inside of the duct D and the air passage A1 formed in the seat cushion S1.

[0172] like Figure 7 As shown, the fourth portion 114 extends obliquely outward and rearward from the rear end of the third portion 113 in the transverse direction.

[0173] The wide portion 115 extends backward from the rear end of the fourth portion 114. Figure 6 As shown, in the wide portion 115, the dimension D11 in the lateral direction is greater than the dimension D12 in the up-down direction. In other words, the wide portion 115 has a thin and flat cross-sectional shape in the up-down direction. In addition, in the present embodiment, not only the wide portion 115, but also the entire lower tube portion 110 has a thin and flat cross-sectional shape in the up-down direction. The lower tube portion 110 includes the wide portion 115, and the lower tube portion 110 is located below the seat cushion S1. Since the dimension of the lower tube portion 110 in the up-down direction is very small, it can be made thinner in the up-down direction. This allows the car seat S to be made more compact in the up-down direction.

[0174] Back to Figure 7 , the wide portion 115 is located below the support member 30, closer to one of the cushion side frames 11 than the lateral middle position (see the dotted line) between the pair of cushion side frames 11, specifically, closer to the right cushion side frame 11. In other words, the wide portion 115 is arranged at a position close to the right cushion side frame 11. That is, when the load from the occupant is received by the support member 30, the middle portion of the seat cushion S1 may be more depressed than the left and right side portions of the seat cushion S1, but the wide portion 115 is arranged at a position slightly to the right, which can suppress the interference between the duct D and the support member 30.

[0175] like Figure 2 As shown in FIG. 1 , in the present embodiment, the fourth portion 114 and the wide portion 115 constitute a lower inclined portion 180. The lower inclined portion 180 extends obliquely rearward and downward when viewed from the left or right side. Therefore, even when an occupant sits on the seat and causes the support portion 30 to sag, interference between the duct D and the support member 30 can be suppressed.

[0176] The first narrow portion 131 and the second narrow portion 132 are portions located at the rear of the cushion frame F1 and extend substantially in the up-down direction. The second narrow portion 132 has inner dimensions in the front-to-back direction and the lateral direction slightly larger than the outer dimensions in the front-to-back direction and the lateral direction of the first narrow portion 131, and is engaged with the upper end portion of the first narrow portion 131. Thus, the first duct D1 and the second duct D2 are connected together. Figure 6 As shown, the first narrow portion 131 and the second narrow portion 132 have a dimension D21 in the transverse direction that is smaller than a dimension D22 in the front-rear direction approximately above and below the transverse direction. In other words, the first narrow portion 131 and the second narrow portion 132 have a transversely thin and flat cross-sectional shape. In addition, in the present embodiment, not only the narrow portions 131 and 132, but also the bellows portion 140 has a transversely thin and flat cross-sectional shape.

[0177] The connecting portion 120 is a portion connecting the first narrow portion 131 (narrow part) and the wide portion 115. The dimension of the connecting portion 120 in the lateral direction increases as it moves away from the first narrow portion 131 and approaches the wide portion 115, and the dimension in the vertical direction gradually decreases accordingly. Therefore, the cross-sectional shape of the duct D gradually changes from the first narrow portion 131 to the wide portion 115, and the rigidity of the duct D can be effectively improved compared to a structure in which the cross-sectional shape does not change. In addition, it is also possible to suppress the undesired contraction of the cross-sectional area of ​​the flow path in the connecting portion 120 of the duct D, and ensure that a sufficient amount of air flows through the duct D.

[0178] The bellows portion 140 extends substantially upward from the upper end of the second narrow portion 132. The bellows portion 140, having a pleated shape with peaks and valleys alternately formed, can be deformed and is expandable and retractable. Figure 2 As shown, the bellows portion 140 is located behind the cushion frame F1, more specifically, is disposed behind the rear pipe 13. More specifically, the bellows portion 140 is located above the lower end 13A of the rear pipe 13. In addition, the upper end of the bellows portion 140 is located immediately behind the lower frame 24, that is, is disposed at a position overlapping with the lower frame 24 when viewed from the rear side.

[0179] In this embodiment, the first narrow portion 131, the second narrow portion 132 and the bellows portion 140 constitute a retracted portion 190. The retracted portion 190 extends obliquely downward and forward. Figure 8As shown, the retracted portion 190 is arranged at a position in the lateral direction inside the pair of cushion side frames 11. Therefore, the car seat S can be made more compact in the lateral dimension compared with the case where the retracted portion 190 is arranged at a lateral outward position of the pair of cushion side frames 11. In addition, the retracted portion 190 is located at the rear side of the cushion frame F1, closer to the right cushion side frame 11 (i.e., one of the cushion side frames) than the lateral middle position between the pair of cushion side frames 11 (see the dotted line). In other words, the retracted portion 190 is arranged at a position close to the right cushion side frame 11.

[0180] Furthermore, the retracted portion 190, that is, the portion of the duct D located at the rear side of the rear tube 13, is arranged at a position different from the position of the rear hook portion 31C of the cable member 31 in the lateral direction. Specifically, the retracted portion 190 is arranged on the right side of the rightmost rear hook portion 31C. Furthermore, the duct D, when viewed from the rear side, has a different position from the second extension portion 31B of the cable member 31 in the lateral direction. Specifically, when viewed from the rear side, the retracted portion 190 and the wide portion 115 (see FIG. 1 ) are arranged at a different position from the second extension portion 31B of the cable member 31. Figure 7 ) is located on the right side of the rightmost second extension 31B. In the present embodiment, the retracted portion 190 and the wide portion 115 do not overlap with the second extension 31B when viewed from any direction, i.e., from the front, rear, left and right, and from above and below. This makes it possible to suppress interference between the duct D and the cable member 31 even when an occupant sits on the seat and causes the cable member 31 (support portion 30) to deform downward.

[0181] The first flat portion 150 extends obliquely upward from the upper end of the retracted portion 190 (the bellows portion 140) toward the lateral middle position between the pair of back side frames 21. The first flat portion 150 is provided at the rear side of the lower frame 24. Figure 6 As shown, the first flat portion 150 has a dimension D41 in the front-to-back direction (facing the lower frame 24) that is smaller than a dimension D42 in the approximate up-down direction perpendicular to the front-to-back direction. In other words, the first flat portion 150 has a thin cross-sectional shape that is flat in the front-to-back direction. Therefore, the thickness of the first flat portion 150 in the front-to-back direction can be reduced, and the car seat S can be made more compact in the front-to-back direction. In addition, in addition to achieving compactness, a gap between the first flat portion 150 and the lower frame 24 can be ensured, so that interference between the duct D and the lower frame 24 can be suppressed.

[0182] return Figure 8The second flat portion 160 extends upward from the upper end of the first flat portion 150. The second flat portion 160 is located at the middle position in the lateral direction between the pair of back frames 21, and is located on the rear side of the S spring 40. In addition, in this embodiment, the second flat portion 160 and the first flat portion 150 have substantially the same size in the front-to-back direction. The second flat portion 160 has a front-to-back direction (direction facing the S spring 40) dimension D41 (refer to Figure 6 ) is smaller than the dimension D43 in the left-right direction perpendicular to the front-rear direction. In other words, the second flat portion 160 has a flat thin cross-sectional shape in the front-rear direction. Therefore, the thickness of the second flat portion 160 in the front-rear direction can be reduced, and the car seat S can be made more compact in the front-rear direction. In addition, in addition to achieving compactness, a gap between the second flat portion 160 and the S spring 40 can be ensured, so that interference between the pipe D and the S spring 40 can be suppressed.

[0183] like Figure 2 As shown, the back connection portion 170 is a portion connected to the air passage A2 formed in the seat back S2, and extends obliquely forward and upward from the upper end of the second flat portion 160. The duct D is connected to a back pad P2 to be described later through the back connection portion 170, which is arranged to pass through the opening 50A formed in the pressure receiving member 50 and to be inserted into the air passage A2 from the rear side of the back pad P2.

[0184] As in Figure 4 In the embodiment, it is known that a weight sensor WS is provided as an example of a sensor below one of the pair of cushion side frames 11, specifically, below the left cushion side frame 11. In the present embodiment, the duct D is closer to the other of the pair of cushion side frames 11 (i.e., the right cushion side frame 11) than one of the pair of cushion side frames 11 (i.e., the left cushion side frame 11) in the lateral direction. In other words, the duct D is provided at a position close to the cushion side frame 11 in the lateral direction, in which the weight sensor WS is not provided. Thus, interference between the duct D and the weight sensor WS and an electric wire (not shown) extending from the weight sensor WS or other members can be suppressed.

[0185] The resin members 32 constituting the support member 30 are arranged to overlap with the duct D when viewed from the upper side. Specifically, the first resin member 32A has a right side portion which is arranged above the third portion 113 of the duct D so as to overlap the third portion 113 viewed from the upper side. Meanwhile, the third resin member 32C on the right side is arranged above the wide portion 115 of the duct D so as to overlap with the wide portion 115 when viewed from the upper side. In addition, the fourth resin member 32D has a right end portion which is located above the wide portion 115 so as to overlap with the wide portion 115 when viewed from the upper side. Therefore, even if the support member 30 is depressed and interferes with the duct D when the passenger sits on the seat, since the resin members 32A, 32C, 32D first contact the duct D, adverse effects caused by the contact between the support member 30 and the duct D, such as noise and / or vibration generated when contacting, can be reduced.

[0186] like Figure 7 As shown in FIG. 1 , in the present embodiment, the lower tube portion 110 has a second portion 112 extending obliquely in the rightward and rearward direction toward the right cushion side frame 11, a third portion 113 extending substantially straight rearward, and then a fourth portion 114 extending obliquely in the rightward and rearward direction, i.e., further toward the right cushion side frame 11, so that the duct D can be arranged to gradually change its route toward the right cushion side frame 11. Therefore, it is possible to suppress a sharp change in the flow path in the duct D, and the air can be made to flow smoothly in the duct D.

[0187] like Fig. 9 As shown, a cover member 80 is provided in the backrest frame F2. The cover member 80 is a member that covers the backrest connection portion 170 from the rear side, and the backrest connection portion 170 is a portion where the duct D connects to the air passage A2 of the seat back S2. The cover member 80 is made of a material such as resin, and is in the shape of a laterally long plate. The left and right ends of the cover member 80 are fastened with bolts or otherwise fixed to the portions of the rear ends of a pair of backrest side frames 21 that extend laterally inward, and are installed thereon accordingly. By providing such a cover member 80, the portion where the duct D and the pad P (backrest pad P2) of the seat back S2 are connected can be protected.

[0188] like Fig.10 and 11 As shown, the car seat S further includes a side frame cover 90. The side frame cover 90 is a member that covers the rear end portion of the right cushion side frame 11. The side frame cover 90 is made of resin and includes a side frame cover portion 91, a duct cover portion 92, and a reclining mechanism cover portion 93.

[0189] The side frame cover portion 91 is a portion that covers the transversely inner side of the rear end portion of the right cushion side frame 11. The side frame cover portion 91 is located above the front side, the lower side, and the rear side of the lower end portion of the back side frame 21.

[0190] The duct cover portion 92 is a portion provided at the rear of the cushion frame F1, and covers the retracted portion 190 as a part of the duct D. More specifically, the duct cover portion 92 is provided at the rear of the rear pipe 13, and covers the first narrow portion 131, the second narrow portion 132, and the bellows portion 140. The duct cover portion 92 includes a first side cover portion 92A extending rearward from the rear end of the side frame cover portion 91 to a position behind the retracted portion 190, and a rear cover portion 92B extending laterally inward from the rear end of the first side cover portion 92A to cover the retracted portion 190 from the rear side. The cross-sectional shape of the rear cover portion 92B is an arc shape that protrudes obliquely rearward and downward, and extends downward and forward along the retracted portion 190.

[0191] The tilt mechanism cover 93 is a portion that covers the tilt mechanism RL and is generally formed in a cup shape that is open on the lateral inner side and bottom side. The tilt mechanism cover 93 is formed to extend from the side frame cover 91 along the outer peripheral surface of the tilt mechanism RL, and mainly includes a peripheral surface cover 93A configured to cover the rear side, upper side and front side of the tilt mechanism RL, and a lateral outer side second side cover 93B configured to cover the tilt mechanism RL.

[0192] The side frame cover 91, the duct cover 92, and the tilt mechanism cover 93 may be integrally formed as a single piece, or a portion thereof may be configured as a separate component. As an example, the duct cover 92 may be configured to be integrally formed with the side frame cover 91, while the tilt mechanism cover 93 formed separately from the side frame cover 91 is provided with a claw engageable in a hole provided in the rear end portion of the side frame cover 91, and the tilt mechanism cover 93 is mounted on the side frame cover 91.

[0193] Since the duct cover 92 and the side frame cover 91 are integrally provided as one body, it is unnecessary to separately provide covers for the cushion side frame 11 and the duct D, so that the number of components of the car seat S can be reduced. In addition, the side frame cover 91, the duct cover 92 and the reclining mechanism cover 93 can be integrally formed as a single piece. In this case, the side frame cover 90 can not only provide protection for the duct D, but also has the function of protecting the reclining mechanism RL, which can further reduce the number of components of the car seat S.

[0194] like Figure 2 As shown, the pad P includes a cushion pad P1 constituting a pad of a seat pad S1 and a back pad P2 constituting a pad of a seat back S2.

[0195] like Figure 1 As shown in the figure, the cushion pad P1 includes a middle portion P11, and a pair of left and right side portions P12 arranged on the left and right sides of the middle portion P11 and protruding upward than the middle portion P11, and the backrest pad P2 has a middle portion P21 and a pair of left and right side portions P22 arranged on the left and right sides of the middle portion P21 and protruding forward beyond the middle portion P21.

[0196] like Fig.12 As shown in , the cushion pad P1 includes a first member 210 and a plate-like second member 220, in which a groove 211 constituting an air passage A1 is formed, and in which a first ventilation hole H1 is formed passing through the upper and lower sides thereof. In addition, the first member 210 includes a first member body 230 and a plate-like groove forming member 240, and the plate-like groove forming member 240 has a groove 211 penetrating in the up-down direction. The groove forming member 240 is disposed on the upper surface of the first member body 230, and the second member 220 is disposed on the upper surface (first member 210) of the groove forming member 240.

[0197] The first member body 230 has a main body central portion 231 that constitutes a middle portion P11 together with a groove forming member 240 and a second member 220, and a pair of side portions P12 are formed on the left and right sides of the main body central portion 231. The front side of the main body central portion 231 has a recessed portion 232, on which the groove forming member 240 and the second member 220 are arranged. A second ventilation hole 250 penetrating up and down is formed at the rear end portion of the bottom surface of the recessed portion 232. The second ventilation hole 250 is connected to the air passage A1 from the lower surface of the first member body 230 (cushion pad P1). By connecting the seat cushion connecting portion 116 (see Figure 6 ) is inserted into the second ventilation hole 250 from the bottom, and the pipe D is connected to the cushion P1. Fig.13 As shown, the second ventilation hole 250 is provided at a position offset from a transverse center position of the cushion pad P1 (see the dotted line).

[0198] The groove forming member 240 has a groove 211 penetrating from top to bottom to form an air passage A1. The structure of the air passage A1 of the cushion pad P1 is that the groove forming member 240 and the second member 220 are sequentially overlapped and arranged on the recessed portion 232 of the first member body 230, and the upper side and the lower side of the groove 211 are respectively covered by the second member 220 and the first member body 230. When viewed from the upper side, the air passage A1 includes a first air passage 261, a second air passage 262, a third air passage 263, a fourth air passage 264 and a fifth air passage 265.

[0199] Each first air passage 261 extends in a direction intersecting the lateral direction, specifically in a substantially front-rear direction. One end (i.e., rear end) of the first air passage 261 is connected to the blower 70 via the fourth air passage 264, the fifth air passage 265, the second ventilation hole 250 and the duct D.

[0200] Each second air passage 262 extends from the other end (ie, the front end) of the first air passage 261 in a direction different from the extending direction of the first air passage 261 (specifically, a transverse inward direction).

[0201] Each third air channel 263 extends from the lateral inner end of the second air channel 262 (i.e., the end opposite to the end connected to the first air channel 261) along a direction intersecting the lateral direction (specifically, the direction in which the first air channel 261 extends toward its rear end, i.e., a direction roughly parallel to the first air channel 261).

[0202] In the present embodiment, two approximately U-shaped flow passages each consisting of the first air passage 261, the second air passage 262, and the third air passage 263 are formed symmetrically with respect to the lateral middle position of the cushion pad P1 on the left and right sides. According to such a configuration, the portion of the cushion pad P1 where the air passage A1 is not formed can be used to support the occupant with good balance; therefore, even if the air passage A1 includes the first air passage 261, the second air passage 262, and the third air passage 263, it is possible to provide an occupant sitting on the seat with increased riding comfort.

[0203] The fourth air passage 264 is a flow passage that connects the left and right rear ends of the first air passage 261 to each other and extends substantially in the lateral direction.

[0204] The fifth air passage 265 is a flow path connecting the second ventilation hole 250 and the fourth air flow passage 264, and extends substantially forward and backward. Specifically, the fifth air passage 265 extends obliquely forward and laterally inward from the second ventilation hole 250 located at a position shifted rightward from the laterally middle position of the cushion pad P1 toward the transverse middle position of the cushion pad P1, and is connected to the middle portion of the fourth air passage 264 in the transverse direction.

[0205] The groove forming member 240 is fixed to the first member body 230 by an adhesive or the like.

[0206] The second member 220 has a plurality of first ventilation holes H1 communicating with the air passage A1. The first ventilation holes H1 of the cushion pad P1 have a first hole 271, a second hole 272, a third hole 273, and a fourth hole 274.

[0207] The first hole 271 is a hole communicating with the first air passage 261; a plurality of first holes 261 are formed along the first air passage 261 extending substantially in the front-rear direction. Specifically, the first hole 271 includes two first holes 271A arranged substantially in the front-rear direction along each first air passage 261, and one first hole 271B arranged in the rear laterally outer side of the first hole 271A.

[0208] The second holes 272 are holes communicating with the third air passage 263, and a plurality of second holes 272 are formed along the third air passage 263 extending substantially in the front-rear direction. More specifically, the second holes 272 include two second holes 272 substantially arranged in front and rear along each third air passage 263.

[0209] The first holes 271A arranged in a front and rear row and the second holes 272 arranged in a front and rear row are arranged side by side with each other in the extending direction of the second air passage 262 , specifically, in the lateral direction.

[0210] The third hole 273 is a hole communicating with the rear end portion of the first air passage 261 , and the fourth hole 274 is a hole communicating with the left and right end portions of the fourth air passage 264 .

[0211] The second member 220 is fixed to the groove forming member 240 and the first member main body 230 (first member 210 ) by an adhesive or the like.

[0212] like Figure 4 As shown, when the cushion pad P1 is placed on the cushion frame F1, the front pipe 14 is located below the cushion pad P1. In this state, the front pipe 14, when viewed from above, is located at a position different from the positions of the first air passage 261, the second air passage 262, and the third air passage 263. Specifically, the front pipe 14, when viewed from above, is disposed behind the first air passage 261, the second air passage 262, and the third air passage 263.

[0213] In addition, in the case where the cushion pad P1 covers the cushion frame F1, the disc frame 12 is located below the front end of the cushion pad P1, supporting the cushion pad P1 from below. In this state, the disc frame 12 is arranged to overlap the first air channel 261, the second air channel 262, and the third air channel 263 when viewed from the upper side. In other words, the disc frame 12 is arranged below the portion where the first air channel 261, the second air channel 262, and the third air channel 263 are formed. In this embodiment, the disc frame 12 is equivalent to a "pad support member". Although the portion of the cushion pad P1 in which the air channels 261-263 are formed is more likely to deform than the portion in which the air channels are not formed, the present embodiment according to which the portion in which the air channels 261-263 are formed can be supported by the disc frame 12, so that excessive deformation of the cushion pad P1 can be suppressed. In particular, in this embodiment, according to this embodiment, the easily deformable portion in which the air channels 262-263 are formed is supported by the plate-shaped disc frame 12; therefore, excessive deformation of the cushion pad P1 can be more effectively suppressed.

[0214] like Fig.14As shown in FIG. 1 , the backrest pad P2 is composed of a first member 310, a second member 320, and a third member 330. The first member 310 is formed with a groove 311 constituting an air passage A2. The second member 320 and the third member 330 are both plate-like in shape with first ventilation holes H2 perforated in front and back. The second member 320 and the third member 330 are arranged on the front surface of the first member 310. In this embodiment, the backrest pad P2 corresponds to a "pad member covering the passenger side of the pressure-bearing member".

[0215] The first member 310 has a bottomed groove 311 recessed rearward and a second ventilation hole 350 penetrating the front and rear sides.

[0216] The air passage A2 of the backrest pad P2 has a structure in which the second member 320 and the third member 330 are overlapped and arranged on the front side of the first member 310 so that the front side of the groove 311 is covered by the second member 320 and the third member 320. The air passage A2 includes a first passage 361, a pair of second passages 362, a pair of third passages 363 (as third air passages), a pair of fourth passages 364 and two fifth passages 365 (as fourth air passages), a sixth passage 366, a seventh passage 367 and a pair of branch passages 368 (as first air passages).

[0217] The first passage 361 , the second passage 362 , the third passage 363 , the fourth passage 364 , and the fifth passage 365 are formed near the center in the up-down direction of the middle portion P21 .

[0218] The first passage 361 extends in the lateral direction. The second ventilation hole 350 extends from the rear surface of the first member 310 (backrest pad P2) and communicates with the first passage 361 constituting the air passage A2. Figure 6 ) is inserted into the second ventilation hole 350 from the rear side, and the duct D is connected to the back cushion P2.

[0219] The second passage 362 extends obliquely upward from the left and right ends of the first passage 361 to the outside in the lateral direction.

[0220] The third passage 363 extends in the up-down direction (orthogonal direction up-down to the lateral direction), specifically, extends upward from the upper end of the second passage 362. A pair of the third passages 363 are arranged side by side in the lateral direction.

[0221] The fourth channels 364 extend inwardly from the upper ends of the third channels 363 in the lateral direction and are connected to each other at their upper ends. In other words, the pair of fourth channels 364 connects the upper ends of the pair of third channels 363.

[0222] The fifth channel 365 is arranged on the lateral inner side of the pair of third channels 363 and extends laterally to connect the pair of third channels 363. The two fifth channels 365 are arranged side by side in the up-down direction. The first channel 361, the second channel 362, the third channel 363 and the fourth channel 364 have substantially the same front-to-back dimension of the groove (depth), and the fifth channel 365 has a groove with a front-to-back dimension that is smaller (i.e., shallower) than the first, second, third and fourth channels.

[0223] The sixth channel 366 and the seventh channel 367 are formed at the upper portion of the middle portion P21.

[0224] The seventh channel 367 extends in the transverse direction.

[0225] The sixth passage 366 is a flow path that connects the upper end portions of the pair of fourth passages 364 and the transverse center portion of the seventh passage 367 and extends substantially up and down.

[0226] The branch channel 368 is located near the vertical center of the third channel 363 and extends outward in the lateral direction along the front surface of the backrest pad P2. Fig.15 As shown in , each branch channel 368 extends outward and upward from the vicinity of the center position of the third channel 363 in the up-down direction, and is oblique to the up-down direction (in the other up-down direction). In other words, the branch channel 368 extends upward obliquely in the lateral direction from the up-down direction near the center of the third channel 363. In addition, in the present embodiment, a portion of the third channel 363 extends downward (in one of the up-down directions) from the portion where it is connected to the branch channel 368, and the second channel 362 and the first channel 361 correspond to the "second air channel" where the branch channel 368 communicates with the second ventilation hole 350.

[0227] The second member 320 and the third member 330 have a plurality of first ventilation holes H2 communicating with the air passage A2 (see Fig.14 The ventilation holes H2 of the back pad P2 include a first hole 371 , a second hole 372 , a third hole 373 , a fourth hole 374 , and a fifth hole 375 formed in the second member 320 , and a sixth hole 376 formed in the third member 330 .

[0228] The first hole 371 is a hole that communicates with the third passage 363 near the lower end thereof.

[0229] The second hole 372 is a hole connected to the third channel 363 near the center position in the up-down direction of the channel, in other words, a position to which the branch channel 368 of the third channel 363 is connected.

[0230] The third hole 373 is a hole that communicates with the fourth passage 364 in the vicinity of the lower end thereof.

[0231] The fourth holes 374 are holes connected to the fifth channels 365 ; a total of six holes are formed in various positions in the center and vicinity of both end portions in the lateral direction of each fifth channel 365 .

[0232] The fifth hole 375 is a hole communicating with the branch channel 368. The fifth hole 375 is located at the end of the middle portion P21 in the transverse direction, more specifically, is provided at the left and right ends of the second member 320.

[0233] The sixth holes 376 are holes communicating with the seventh passage 367 , and are formed one each at positions facing the left and right ends of the seventh passage 367 .

[0234] The backrest pad P2 has a substantially U-shaped folded groove 380 on the left and right sides and the upper side (in one direction perpendicular to the lateral direction) of the second member 320 as the ventilation hole forming portion. In the backrest pad P2, a hanging wire (not shown) is buried in the folded groove 380 along the folded groove 380 by insert molding to attach the outer cover U2 (see FIG. Fig.16 ) is hung in the folded groove 380. A portion of the hanging wire is exposed from a plurality of holes 381 at the bottom of the folded groove 380. The outer cover U2 of the seat back S2 is hung to the back cushion P2, wherein a hook or the like provided on the outer cover U2 is hooked to the exposed hanging wire portion through the hole 381.

[0235] like Fig.16 As shown, each branch channel 368 has an end, namely a lateral outer end, which is enclosed in the outer cover member U2 folded into the folding groove 380. The branch channel 368 has a relative surface 368A facing the fifth hole 375. The relative surface 368A is located at the lateral outer end portion of the branch channel 368. More specifically, the relative surface 368A is located at a position closer to the lateral outer end position of the branch rather than the lateral center position. When viewed from the front side, the relative surface 368A extending toward the edge (specifically, the lateral outer edge) of the backrest pad P2 is inclined in an inclined direction toward the front side. The relative surface 368A is formed in the first member 310.

[0236] The second member 320 and the third member 330 (see Fig.14 ) is fixed to the first member 310 by an adhesive or the like.

[0237] Back to Fig.15, the air passage A2 is arranged to intersect with the cable member 60 when viewed from the front side. Specifically, the second passage 362 and the fourth passage 364 extending obliquely are arranged to intersect with the extension 61 of the cable member 60 when viewed from the front side. In addition, the fifth passage 365 is arranged so that the left end portion and the right end portion intersect with the extension 61. On the other hand, the first passage 361 and the third passage 363 are arranged at different positions from the extension 61 when viewed from the front side. Specifically, the first passage 361 is arranged at a position on the inner side in the transverse direction of the extension 61, and the third passage 363 is arranged at a position on the outer side in the transverse direction of the extension 61. The sixth passage 366 is arranged at a position on the inner side in the transverse direction of the inclined portion 62 and the lower part of the upper connecting portion 63 of the cable member 60, and the seventh passage 367 is located at a position on the inner side in the transverse direction of the upper end of the upper connecting portion 63.

[0238] Since the cushion pad P1 and the backrest pad P2 include: the first member 210, 310 formed with the air passages A1, A2, and the second member 220, 320 formed with the ventilation holes H1, H2, the cushion P can be easily formed compared with the structure in which the cushion having the air passages A1, A2 and the first ventilation holes H1, H2 are formed in one piece. In detail, the cushion pad P1 and the backrest pad P2 can also be easily formed, wherein the cushion pad P1 is formed with the air passage A2 including the air passages 261-263, and the backrest pad P2 includes the air passage A2 having the obliquely extending opposite surface 368A formed therein. In addition, since the cushion pad P1 includes the first member 210 composed of the first member body 230 and the groove forming member 240, the first member 210 having the air passage A1 of a complex shape including the air passages 261-263 can be easily formed. In this way, the cushion pad P1 can be more easily formed.

[0239] According to the above embodiment, Figure 2 As shown in FIG. 1 , the duct D (retracted portion 190 ) on the rear side of the seat cushion S1 can be protected by the duct cover portion 92 of the side frame cover 90 , and the feet of the occupant sitting on the rear seat can be prevented from hitting the duct D.

[0240] Furthermore, since the duct cover portion 92 covers the bellows portion 140 , it is possible to prevent the feet of the occupant sitting on the rear seat from hitting the bellows portion 140 , which is the soft portion of the duct D.

[0241] In addition, since the bellows portion 140 is located above the lower end 13A of the rear pipe 13, the feet of the occupant sitting on the rear seat can be further prevented from hitting the bellows portion 140 of the duct D compared to the case where the bellows portion is located below the lower end 13A of the rear pipe 13.

[0242] Since the narrow portions 131 and 132 have a smaller transverse direction (i.e., width) dimension, it is possible to prevent the feet of the passengers sitting on the rear seats from hitting the narrow portions 131 and 132 of the duct D. Moreover, since the narrow portions 131 and 132 have a smaller transverse direction dimension and a larger substantially front-rear direction dimension, they have a sufficiently strong shape to withstand a load placed substantially in the front-rear direction. Even if the narrow portions 131 and 132 are hit by the feet of the passengers sitting on the rear seats, deformation or other harmful effects on the duct can be effectively suppressed.

[0243] In addition, according to this embodiment, if Figure 8 Behind the seat cushion S1 shown in FIG. 1 , the retracted portion 190 of the duct D is arranged close to the right cushion side frame 11 , which can prevent the feet of a passenger sitting on the rear seat from hitting the duct D.

[0244] Since the retracted portion 190 extends obliquely downward and forward, the retracted portion 190 of the duct D is located at a position away from the feet of the passenger sitting on the rear seat, behind the seat cushion S1. Therefore, the duct D is less likely to be hit by the feet of the passenger sitting on the rear seat.

[0245] In addition, according to the present embodiment, since the backrest connecting portion 170 of the duct D can be connected to the air passage A2 formed in the backrest pad P2 through the opening 50A of the pressure-bearing member 50, the duct D can be easily connected to the air passage A2 of the backrest pad P2 even in a structure in which the car seat S includes a plate-like pressure-bearing member 50.

[0246] Furthermore, since the opening 50A is provided at a position not overlapping the S spring 40 when viewed from the rear side, the back connection portion 170 of the duct D can be easily arranged to the opening 50A of the pressure receiving member 50. As a result, the duct D and the air passage A2 of the back pad P2 can be more easily connected.

[0247] In addition, according to this embodiment, if Fig.13 As shown in FIG. 1 , the first ventilation hole H1 of the cushion pad P1 includes a first hole 271 communicating with the first air passage 261, and a second hole 272 communicating with the third air passage 263, and air can pass through a wide area of ​​the seat surface. On the other hand, the first air passage 261, the second air passage 262, and the third air passage 263 can be formed as one continuous flow passage, so the number of flow paths communicating with the blower 70 can be reduced. Therefore, it is possible to prevent the air flowing in the air passage A1 from being weakened, so that the air can flow smoothly in the cushion pad P1.

[0248] Since the row of the first holes 271A and the row of the second holes 272 are arranged side by side with each other, air can be distributed over a large area of ​​the surface of the seat, and the plurality of first ventilation holes H1 can be arranged in a manner allowing efficient air flow.

[0249] Since the fifth air passage 265 extends from the second ventilation hole 250 toward the transverse center position in the oblique forward direction and is connected to the fourth air passage 264, the fifth air passage 265 connecting the second ventilation hole 250 and the fourth air passage 264 does not bend sharply. Therefore, air can flow from the second ventilation hole 250 to the fourth air passage 264 through the fifth air passage 265, and further flow to the first ventilation hole H1 through the first air passage 261, the second air passage 262 and the third air passage 263.

[0250] In addition, according to this embodiment, if Fig.16 As shown in FIG. 1 , since the opposing surface 368A of each branch channel 368 extending toward the lateral outer edge of the back pad P2 is inclined toward the front side at an angle, the air passing through the fifth ventilation hole 375 can flow along the inclined surface of the opposing surface 368A. Therefore, the air can flow smoothly.

[0251] Since the opposing surface 368A is disposed above the lateral outer end of the branch channel 368, the slope of the opposing surface 368A can be used to allow air to flow more efficiently compared to the case where the opposing surface is placed at some midpoint in the length of the branch channel 368. This allows better air flow.

[0252] Since the fifth hole 375 is located at the end of the middle part P21 in the lateral direction, when the fifth hole 375 blows out air (refer to the dotted line), the air flowing rapidly along the slope of the opposite surface 368A can be blown out from the fifth hole 375 to brush against the body of the passenger. This can increase the cool feeling.

[0253] Since the branch channel 368 extends obliquely upward in the transverse outward direction away from the second ventilation hole 350 , the air flowing from the second ventilation hole 350 can smoothly flow through the first channel 361 and the second channel 362 , and further flow to the branch channel 368 through the third channel 363 .

[0254] Although an embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment. Regarding the specific configuration, it can be appropriately changed within the scope of the gist of the present invention as described below. Hereinafter, the same components as those mentioned in the above-described embodiment will be represented by the same reference numerals, and their description will be omitted where appropriate, and a detailed description of the different aspects from the above-described embodiment will be given.

[0255] For example, Fig.17As shown in , the side frame cover 90 may be configured such that the duct cover portion 92 includes a rib-shaped protrusion 95 protruding from its inner surface toward the duct D, and the protrusion 95 is disposed deep and engaged in the folds or grooves of the bellows portion 140. According to such a configuration, it is possible to restrict the position of the duct D by engaging the protrusion 95 of the duct cover portion 92, thereby suppressing the movement of the conduit D.

[0256] like Fig.17 As shown in , the opening 50A of the pressure-receiving member 50 may be provided with its edge portion to allow the pipe D to be held therein. According to such a structure, the pipe D is allowed to be held by the pressure-receiving member 50, thereby eliminating the necessity of another member to hold the pipe D, thereby reducing the number of parts of the car seat S. Figure 8 As shown in , where the opening 50A is provided between a pair of extensions 61 of the cable member 60 , if the pressure-bearing member 50 holds the pipe D, the pipe D can be fixed to a high-rigidity portion of the pressure-bearing member 50 between the pair of extensions 61 , so that the pipe D can be firmly held by the pressure-bearing member 50 .

[0257] Although the above embodiment is configured so that the opening 50A is located between a pair of extensions 61, this configuration is not necessary; for example, the opening may be located outside the extension 61 in the lateral direction (i.e., in the direction up and down the predetermined direction). As an example, Fig.18 As shown in FIG. 5 , the opening 50B for inserting the pipe therein is located at the lateral outer side of the extension 61, specifically, is provided at the right side of the right extension 61. Since the portion of the pressure-bearing member 50 at the lateral outer side of the extension 61 is more easily deformed than the portion between the pair of extensions 61, the position of the opening 50B at the portion more likely to deform makes it easy to connect the pipe D to the opening 50B. It should be noted that the opening 50B may be provided at the left side position of the left extension 61.

[0258] Furthermore, in the above-described embodiment, the pressure-bearing member 50 is connected to the back frame F2 via a single cable member 60, but the configuration is not limited thereto; of course, two cable members may be used to connect the pressure-bearing member 50 to the back frame F2. In the above-described embodiment, the single cable member 60 has a pair of extensions 61, however, when the pressure-bearing member 50 is connected to the back frame F2 via two cable members, each cable member includes one extension.

[0259] Although the above embodiment is configured so that the pressure-bearing member 50 is not driven, the configuration is not limited thereto; for example, another structure is feasible, so that the pressure-bearing member 50 moves forward and backward and / or arches forward, thereby changing the shape of the portion thereof that can contact the waist area of ​​the occupant, and the supporting state of the waist of the occupant can be changed. In this case, it is preferred to provide a pressure-bearing member driving device, such as a driver for driving the pressure-bearing member 50. For the sake of convenience, reference is made to FIG. Figure 8 , on one of the pair of backrest side frames 21, specifically, on the left backrest side frame 21. Since the duct D is provided not near the left backrest side frame (one of the pair of backrest side frames) but closer to the right backrest side frame (the other of the pair of backrest side frames), interference of the duct D with other parts such as the pressure-bearing member driving device or the electric wires extending from the pressure-bearing member driving device can be suppressed. In addition, it is preferred that the pressure-bearing member driving device is provided on the inner side of the pair of side frames in the lateral direction. As a result, the car seat can be reduced in size in the lateral direction.

[0260] Optionally, the pressure-bearing member driving device is arranged on the right backrest side frame 21 or the right seat cushion side frame 11, and its position overlaps with the duct D in the lateral direction, then the pressure-bearing member driving device may preferably be arranged at a position different from the duct D in the front-to-back direction or the up-and-down position. For example, the pressure-bearing member driving device is preferably placed in front of the duct D. Accordingly, the interference between the duct D and the pressure-bearing member driving device can be suppressed. Another arrangement, a duct below the pressure-bearing member driving device arranged in the seat cushion, and a duct on the rear side of the pressure-bearing member driving device arranged in the seat back, can suppress the interference between the duct and the cushion. In the case where the pressure-bearing member 50 is configured to move forward and backward, the bellows portion 171 configured to be retractable may preferably be arranged in the rear end portion of the backrest connecting portion 170, such as Fig.17 As shown. According to this, when the pressure receiving member 50 moves, the pipe D can be prevented from being separated from the back pad P2. In addition, the pressure receiving member driving device is not limited to the driver, and may be, for example, a control unit for controlling the driver or the like.

[0261] Although in the above-described embodiment, the side frame cover 90 is configured to be a covering portion (rear end portion) of the cushion side frame 11, it is not limited thereto, and for example, the side frame cover 90 may be configured to cover the entire cushion side frame 11. Alternatively, for example, the duct cover portion 92 may cover only a portion of the bellows portion 140 that is a soft portion, or may cover the entire portion.

[0262] Although in the above-mentioned embodiment, as in Figure 4 As shown in FIG. 1 , the tray frame 12 as the pad support member has been arranged to overlap the entire air passage 261-263, but is not limited thereto. For example, for ease of explanation, refer to Figure 4 , when viewed from above, the position of the disc frame 12 may overlap the entire second air passage 262, and the front portions of the first and third air passages 261, 263. In other words, the pad support member may be arranged to overlap at least a portion of the first air passage, the second air passage, and the third air passage. In addition, the pad support member is not limited to a plate-like member such as the disc frame 12, but may be, for example, a member made of a tube material, etc.

[0263] Although in the above embodiment, the first hole 271 and the second hole 272 are set as the first ventilation holes, which are respectively formed at multiple positions in the cushion pad P1, it is not limited to this. For example, another configuration may be that multiple first holes are formed, and only one second hole is formed therein, or vice versa. In other words, it is sufficient to form at least one first hole and at least one second hole respectively. In addition, in the above embodiment, although the second ventilation hole 250 of the cushion pad P1 is arranged at a position shifted from the lateral center to the right, it is not limited to this. For example, the second ventilation hole 250 is arranged at a position shifted from the lateral center to the left, or it may be arranged in the middle position in the lateral direction. In addition, in the above embodiment, although two flow channels including air channels 261-263 have been formed, it is not limited to this, and it may be three flow channels, or one flow channel is formed.

[0264] Although in the above embodiment, one end of the branch channel 368 is closed, it is not limited thereto, and another configuration may be that one end is not closed. In addition, a plurality of fifth holes 375 (first vents) communicating with the first air channel may be provided for each first air channel.

[0265] Although in the above-described embodiment, the cushion pad P1 and the back pad P2 have been configured to include a plurality of members, this is not limiting, and for example, each pad may be constituted by one member.

[0266] Although in the above-described embodiment, the duct D includes the bellows portion 140 as the soft portion, it is not limited thereto, and the soft portion may be configured without particular limitation in structure as long as it has deformability.

[0267] Although in the above-described embodiment, the supporting member includes a plurality of cable members 31 and a resin member 32 connecting the cable members 31, the present invention is not limited thereto. For example, the supporting member may have a configuration in which a plurality of cable members are substantially entirely covered and connected by a resin member (resin). In addition, the supporting member may be composed only of a cable member such as an S spring.

[0268] Although the Sirocco fan illustrated in the above embodiment is used as an example of the blower 70, it is not limited thereto, for example, it can be a propeller fan or a turbo fan. In addition, although in the above embodiment, the car seat S has been configured to blow air from the first vents H1, H2, it is not limited thereto, for example, it is configured so that air is sucked from the first vent. The blower can be a blower capable of switching between blowing and exhausting, for example, by switching the direction of rotation of the impeller. Although in the above embodiment, the car seat S includes a blower 70, the car seat itself may not be provided with a blower. In other words, the blower can be provided in the body of a car on which a car seat is mounted. In this case, the car seat can be configured so that the duct is connected to an air outlet or suction port, for example, provided in the car body.

[0269] Although in the above embodiment, the sensor arranged below the cushion side frame 11 is illustrated as a weight sensor WS for detecting the weight of the seat, it is not limited thereto, and for example, a position sensor or the like may be used to detect the front-rear position of the seat.

[0270] In addition, similar structures adopted in the frame and pad of the seat cushion S1 described in the embodiment may be adopted in the seat back, and similar structures as the frame and pad of the seat back S2 may be adopted in the seat cushion. In addition, although in the above embodiment, it has been formed, it is not limited to this; another configuration may be that the air passage may be formed in only one of the seat cushion and the seat back.

[0271] In addition, in the above embodiment, the car seat S installed in the car is represented as the vehicle seat, but it is not limited to this. The vehicle seat can be a seat installed in other vehicles other than the car, such as railway vehicles, ships, airplanes, etc.

[0272] In addition, the examples described in the above-mentioned embodiments and modifications may be arbitrarily combined and implemented.

Claims

1. A vehicle seat, characterized in that: include, a pair of side frames (11, 21); A connecting frame (24) connecting the pair of side frames; A plate-shaped pressure-bearing member (50) for bearing the load from the occupants; a cushion member (P2) arranged on the passenger side covering the pressure-bearing member (50); a duct (D) having air passages (A1, A2) formed in the cushion member, the duct (D) being used to connect the air passages (A1, A2) and a blower (70), the duct (D) being connected to the air passages (A1, A2) from the side opposite to the passenger side of the cushion member (P2), The pressure-bearing member (50) has an opening (50A) for allowing the pipeline (D) to pass through. The duct (D) comprises a first flat portion (150), the first flat portion (150) is located on the opposite side of the connecting frame (24) to the passenger side, and the dimension of the first flat portion (150) in the direction facing the connecting frame (24) is smaller than the dimension in the direction perpendicular thereto.

2. The vehicle seat according to claim 1, characterized in that: include, A cover member (80) covers a connection portion between the duct (D) and the air passages (A1, A2) from a side opposite to a passenger side.

3. The vehicle seat according to claim 1, characterized in that include, An S spring (40) installed between the pair of side frames (11, 21); The duct (D) includes a second flat portion (160) disposed on the opposite side of the passenger side of the S spring (40), and a dimension of the second flat portion (160) in a direction facing the S spring (40) is smaller than a dimension in a direction perpendicular thereto.

4. The vehicle seat according to any one of claims 1 to 3, characterized in that: include, a cable member (60) connecting the pressure-bearing member (50) and the frame of the seat, The cable member (60) includes a pair of extensions (61), the two extensions (61) extending in a predetermined direction and arranged side by side in a direction perpendicular to the predetermined direction, and when viewed from the passenger side, the two extensions (61) are located at a position overlapping the pressure-bearing member (50), The opening (50A) is located between the two extension portions (61).

5. The vehicle seat according to any one of claims 1 to 3, characterized in that: include, a cable member (60), wherein the cable member (60) connects the pressure-bearing member (50) and the frame of the seat, The cable member (60) includes an extension portion (61), the extension portion (61) extending in a predetermined direction and located at a position overlapping with the pressure-bearing member (50) when viewed from the passenger side. The opening (50A) is located outside the extending portion (61) in a direction perpendicular to the predetermined direction.

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