JP5419218B2 - Ducted seat cushion - Google Patents

Description

  The present invention relates to a seat cushion that constitutes a seat portion of a vehicle seat and includes a duct with a duct integrated by insert molding.

  The seat cushion that constitutes the seat of a seat seat mounted on a vehicle such as an automobile is a part where the occupant sits and touches directly, and the occupant sweats in the hot season, but cools when the winter season is approached I may feel it. For these reasons, there has been proposed a seat that can send air whose temperature is adjusted by providing an air distribution passage inside the seat pad (for example, Patent Document 1).

JP 2005-95343 A

However, the invention of Patent Document 1 is a cushion pad having “... a molded body having a wind distribution passage extending along the seat surface” as described in claim 1, and is provided on the seat surface through the wind distribution passage. While the occupant sits down, the air distribution passage that extends along the seat surface may be different from the cushioning property of the cushion pad, and the seating comfort may be uncomfortable. is there. In addition, as described in claim 3, the `` the molded body is a planar member arranged substantially parallel to the sheet surface and having the air distribution passage formed into a tubular shape '', The bending of the urethane pad that is elastically deformed by the pressure applied at the time of sitting is blocked by the planar member, which tends to further reduce riding comfort and sitting comfort.
In addition, in the manufacture of the cushion pad of Patent Document 1, the planar member is installed in the lower mold and the foamed resin material such as urethane material is injected. There is also a possibility that the quality of the molded part between the planar member and the lower mold cavity may deteriorate.

  An object of the present invention is to solve the above-mentioned problem, and to provide a seat cushion with a duct that satisfies a ride comfort and a seat comfort while enabling a smooth temperature adjustment of the surface of the seat.

In order to achieve the above object, the gist of the invention described in claim 1 is a seat cushion (S) that constitutes a seat portion of a vehicle seat, and a depression (20 A plurality of seat pads (1), and a distribution duct main part (6) running vertically and horizontally along the back surface (2b) of the main part (2) of the seat pad, and the distribution duct main part The air distribution duct (5) in which a plurality of air discharge ports (64) are formed on the front surface side of the distribution duct main part (6) while the air introduction port (62) is formed on the back surface side of (6), and the nonwoven fabric (91) , and the seat pad (1) is integrally foamed by inserting the air duct (5) and the nonwoven fabric (91), and the air discharge port (64) is The duct (20) is aligned with each other so that the duct internal flow path (60) is electrically connected to the recess (20), and the air inlet (62) is looked into the back surface (1b) side of the seat pad (1). And the nonwoven fabric (91) is a ducted seat cushion characterized in that it covers the air duct (5) and is integrally attached to the back surface (1b) of the seat pad (1) .

The seat cushion with a duct according to claim 2 is the seat cushion with duct according to claim 1, wherein a plurality of nozzle portions (65) are erected on the surface side of the distribution duct main portion (6), and the front end opening (65a) of each nozzle portion (65). Is the air discharge port (64). The seat cushion with a duct according to claim 3 is characterized in that, in claim 1 or 2, the air distribution duct (5) is formed with an accordion portion (8) interposed in the middle of the path. The seat cushion with duct according to claim 4 is the seat cushion with duct according to claims 1 to 3, wherein the air distribution duct (5) extends from the distribution duct main part (6) to the distribution duct sub part (7). The vertical duct portion (7a) of (7) is disposed on the side portion (3) provided on both sides of the main portion (2) and has a cross-sectional area of the vertical duct portion (7a) running in the vehicle longitudinal direction. The cross-sectional area of the vertical cylinder portion (6a) running in the vehicle longitudinal direction related to the distribution duct main portion (6) and from the surface (3a) of the side portion (3) to the vertical duct portion (7a). The reaching pad thickness (t2) is smaller than the pad thickness (t1) from the surface (2a) of the main part (2) to the distribution duct main part (6).

The duct seat cushion according to claim 5 is the seat cushion with ducts according to claims 1 to 4 , wherein the cross-sectional shape of the distribution duct main part (6) is a flat shape having a wide horizontal width (x) with respect to the vertical height (y). The side wall portion (6a2) extending in the vertical direction is formed in an arc shape. The ducted seat cushion according to claim 6 is the seat cushion (1) according to claim 1 , wherein the upper surface opening (20c) of the recess (20) provided in the surface (1a) of the seat pad (1) is aligned with the recess (20). The air discharge port (64) that is made conductive is made larger than the air discharge port (64). A seat cushion with a duct according to claim 7 is the seat cushion with ducts according to claims 1 to 6 , wherein a tongue-like clip stopper (68) is formed to project from the main part (6) of the distribution duct, and the clip stopper (68) is the seat pad. (1) It is characterized by being arranged in a hanging groove (41) for covering the skin provided on the surface (1a) side. The seat cushion with a duct according to claim 8 is the seat cushion with duct according to claims 1 to 7 , wherein the vertical cylinder portion (6a) running in the vehicle front-rear direction according to the distribution duct main portion (6) is provided at both side corners of the back surface (2b) of the main portion. It is characterized by having a hypotenuse part (hy) arranged along the cross-section and facing the occupant's buttocks (Bu) seated on the main part (2).

The ducted seat cushion of the present invention ensures the necessary thickness for the seat pad while allowing smooth temperature adjustment by sending air-conditioned air from various places with depressions to the occupant seated on the seat seat, and when seating the occupant The duct has good follow-up performance to satisfy the ride comfort and sitting comfort, and the non-woven fabric covers the duct and is integrated with the back of the seat pad to eliminate the duct falling off. It exhibits an excellent effect such as.

It is a perspective view of the seat pad with a duct of the state which removed the skin with the seat cushion with a duct of Embodiment 1. FIG. It is a perspective view of the duct for wind distribution by which the front-end | tip opening of a nozzle part is correspondingly arrange | positioned by the hollow of the seat pad of FIG. FIG. 3 is a detailed perspective view of the air distribution duct of FIG. 2. It is the IV-IV line arrow directional view of FIG. It is the VV line arrow directional view of FIG. 6 is a partial enlarged view of FIG. 5, and is a cross-sectional view in which another nozzle portion is employed in the nozzle portion of FIG. 5. It is the schematic perspective view which looked at the seat cushion with a duct of FIG. 1 from the back surface side. It is the elements on larger scale of FIG. FIG. 9 is a cross-sectional view corresponding to the cross-sectional view taken along the line IX-IX in FIG. It is a seat cushion with a duct of another form concerning Embodiment 3, and is a sectional view of a seat pad with a duct which omitted the skin illustration. FIG. 6 is a cross-sectional view corresponding to FIG. 5, showing a ducted seat cushion according to another embodiment. It is a principal part enlarged view of FIG.

Hereinafter, the seat cushion with a duct according to the present invention will be described in detail.
(1) Embodiment 1
1 to 8 show one embodiment of the seat cushion with duct according to the present invention, FIG. 1 is a perspective view of the seat cushion with duct according to the present invention, FIGS. 2 and 3 are perspective views of the duct for air distribution, and FIG. IV-IV line arrow view of FIG. 2, FIG. 5 is a VV line arrow view of FIG. 1, FIG. 6 is a sectional view around the nozzle part of another embodiment, FIG. 7 is a perspective view of a ducted seat cushion from the back side, FIG. 8 shows a partially enlarged view of FIG. In order to make the drawings easy to understand, FIGS. 1 and 8 omit the illustration of the epidermis.

  The duct-containing seat cushion S includes a seat pad 1, an air distribution duct 5 (hereinafter simply referred to as “duct”), a non-woven fabric 91, and a skin 99 (FIG. 4). The seat cushion S with duct, a known backrest (not shown), and a known headrest (not shown) form a vehicle seat. The lower body of the occupant M on which the seat cushion S with the duct is seated is supported (FIGS. 5 and 9), and the backrest is tiltably attached to the rear part to hold the upper body of the occupant M. Install to protect occupant head.

  The seat pad 1 is a foam that is foam-molded into the shape of the seat cushion S using a foamed resin material such as a polyurethane material. As shown in FIG. 1, FIG. 5, and FIG. 9 according to Embodiment 2 described later, the seat pad 1 having a high cushioning property includes a main part 2 that supports the buttock Bu and thigh TH of the occupant M It is roughly divided into a side portion 3 that supports the side portions of the buttock Bu and the thigh TH on both sides. The side portion 3 is formed so as to be raised with respect to the main portion 2 so that the occupant M can maintain a good posture even when the vehicle M is subjected to lateral acceleration during vehicle travel. Here, the horizontal direction in FIG. 1 is the vehicle traveling direction or the vehicle front-rear direction, which is also referred to as the vertical direction in the present invention. The right direction in FIG. 1 is the vehicle forward direction. The up and down direction on the paper surface of FIG. The vertical direction in FIG. 1 is the vertical direction of the present invention, and the upward vertical direction on the paper is the upward direction (front side).

A suspension groove 41 is formed on the surface 1a of the seat pad 1 for tension-fixing the skin 99 to be applied in a later process (FIGS. 1 and 8). Here, the suspension groove 41 is formed with a pair of longitudinal grooves 41a that run in the vehicle front-rear direction at the boundary between the main portion 2 and the side portion 3, and a lateral groove 41b that connects the longitudinal grooves 41a is formed in the vehicle width direction. Two lateral grooves 41b are provided that are arranged substantially in parallel with a predetermined interval. Reference numeral 42 denotes a hog ring portion made of a hog ring wire or the like.
On the surface 1a of the seat pad 1 on the occupant contact side, finally, a plurality of dents 20 for air-conditioning air are provided at necessary locations. In this embodiment, eleven depressions 20 are provided in the main part 2, and one depression 30 is provided in each side part 3. And the duct 5 which aligned each front-end | tip port 65a (75a) of the nozzle part 65 (75) to each hollow 20 (30) is arrange | positioned.

  The duct 5 is provided such that the distribution duct main portion 6 runs vertically and horizontally along the back surface 2 b of the main portion 2 related to the seat pad 1, and a nozzle portion 65 made of a short pipe is provided on the surface side of the distribution duct main portion 6. Are tubular members standing upright (FIGS. 2 and 4).

  The duct 5 of the present embodiment includes a pair of vertical cylinder portions 6a that run in the vehicle front-rear direction (vertical direction) at a slightly narrower interval than the interval between the pair of vertical grooves 41a, and a vehicle width at the approximate center between both vertical cylinder portions 6a. It has the distribution duct main part 6 of the air distribution flow path 60 which is substantially H-shaped in a plan view as shown in FIGS. 2 and 3 with the horizontal cylinder part 6b which runs in the direction (lateral direction) and connects the vertical cylinder parts 6a. Further, the distribution duct sub-portion 7 that is a branch pipe that extends at a substantially intermediate point in the vehicle longitudinal direction of the vertical cylinder portion 6a from the both outer side surfaces of the vertical cylinder portion 6a to both outwards so as to widen the wings. Have A distal end port 75 a related to the nozzle portion 75 at the distal end portion of the distribution duct sub-portion 7 is installed toward the surface 3 a side of the side portion 3. The distribution duct main portion 6 is arranged along the back surface 2b of the main portion 2, and each nozzle portion 65 (75) aligns the tip opening 65a (75a) with the recess 20 (30), respectively. (70) is arranged to be electrically connected to the inside of the recess 20 (30), and the seat pad 1 is integrally foamed with the duct 5. As shown in FIGS. 4 and 8, the tip 65b (75b) of each nozzle portion 65 (75) penetrates the bottom surface 20a (30a) of each recess 20 (30) to form a nozzle tip 65a ( 75a) looks into the depression 20 (30). As shown in FIG. 4, the distribution duct main part 6 is arranged along the back surface 2 b of the main part 2 and the seat pad 1 is integrally formed. Therefore, even if the duct 5 exists, the distribution duct main part 6 is located above the distribution duct main part 6. A sufficient pad thickness is ensured in the main portion 2 where the occupant M sits.

  On the other hand, on the back side (lower surface side) of the distribution duct main portion 6, an air introduction cylinder portion 61 is erected to form a cylinder opening which is an air introduction opening 62. The air introduction cylinder portion 61 erected on the center back surface of the horizontal cylinder portion 6b protrudes from the substantially back center of the seat cushion S as shown in FIG. An air introduction port 62, which is a tip end of the air introduction cylinder portion 61, is viewed on the back surface 1b side of the seat pad 1, and the air introduction port 62 is connected to a blower unit through a connection pipe (not shown). Air-conditioned air is supplied from the blower unit to the air inlet 62 via the connecting pipe. The air-conditioned air passes through the duct 5 forming the air distribution flow path 60 (70) as shown in FIG. 4 and passes through the tip port 65a (75a) of each nozzle portion 65 (75), and the upper surface opening 20c (30c) of the recess. It is set to blow out from.

Further, the duct 5 is a tubular resin molded product in which the bellows portion 8 is interposed in the middle of the path, and the bellows portion 8 is integrated with the duct body by blow molding. It is a blow molded product made of polypropylene resin or the like. Here, as shown in FIGS. 2 to 4, the bellows portion 8 is located in the middle of the route of the distribution duct main portion 6 related to the duct 5, specifically, at a position near the buttocks Bu where the occupant M sits and takes the most weight. Is provided. The vertical cylinder part 6a of the distribution duct main part 6 is installed in the vehicle front-rear direction, and the bellows part 8 has a ridge line 81a of a mountain 81 perpendicular to the longitudinal direction of the vertical cylinder part 6a. The flexure deformation of the duct 5 in the vehicle front-rear direction when the occupant is seated can be easily handled by the bellows portion 8. In the figure, reference numeral 82 denotes a valley of the bellows portion 8.
Further, in the course of the distribution duct sub-part 7, a bellows part 8 is provided in the vicinity of the vertical groove 41a provided in the boundary part between the main part 2 and the side part 3 as shown in FIG. The ridgeline 81a of the peak 81 of the bellows portion 8 is arranged substantially parallel to the groove direction of the vertical groove 41a. When the occupant is seated, the side portion 3 bends as indicated by the arrow in FIG. 9 with the groove line of the vertical groove 41a as a fulcrum with respect to the main portion 2, but the ridgeline 81a of the bellows portion 8 is substantially parallel to the groove direction of the vertical groove 41a. The bellows portion 8 enhances the followability of the distribution duct sub-portion 7 against this bending deformation.

Further, the duct 5, the cross-sectional shape in FIG. 5 of the dispensing duct main portion 6, a horizontal width x is a wide flat shape, the side wall portion 6a ₂ of and extending vertically with respect to the vertical direction height y as shown in FIG. 6 The standing wall portion is eliminated, and an arc shape is formed in a sectional view. The duct 5 is not only deformed and deformed at the bellows portion 8 but also has such a cross-sectional shape, and when the occupant M is seated on the seat cushion S, when stress is applied, the duct itself (distribution duct main portion 6 ) Make it easier to follow. As shown in FIGS. 5 and 6, by forming the flattened duct 5 whose cross-sectional shape is low in the vertical height y, the pad thickness from the upper surface of the distribution duct main portion 6 to the seat pad surface 1a is increased. It is also. Similarly to the distribution duct main portion 6, the distribution duct sub-portion 7 extends in the vehicle width outward direction from the vertical cylindrical portion 6 a, and the cross-sectional shape of the distribution duct subportion 7 is flat with a wide horizontal width with respect to the vertical height as shown in FIG. 3. A side wall portion that is shaped and extends in the vertical direction is formed in an arc shape. When the occupant is seated, the side portion 3 bends with respect to the main portion 2 as indicated by the arrow in FIG. 9 with the groove line of the longitudinal groove 41a as a fulcrum. Easier to improve follow-up.

  Further, the nozzle portion 65 having a nozzle diameter slightly smaller than the horizontal width x is erected on the upper surface of the flattened wide distribution duct main portion 6. As shown in FIGS. 5 and 6, the cross-sectional shape is a saddle shape that narrows at a nozzle portion 65 extending from the distribution duct main portion 6. The distribution duct main portion 6 is elastically deformed as shown by a chain line in FIG. 6 with respect to a load applied vertically downward from above the nozzle portion 65 when the occupant is seated, thereby making it easier to follow the load and further enhancing the riding comfort and sitting comfort.

  On the other hand, at the place where the nozzle portion 65 (75) conducts by aligning the tip opening 65a (75a) with the recess 20 (30), the recess 20 (on the surface of the seat pad 1 as shown in FIGS. 4 and 8). The upper surface opening 20c (30c) of 30) is made larger than the front end opening 65a (75a) of the nozzle portion 65 (75) which is aligned with the recess and is conducted. This is for smooth temperature adjustment of the sheet surface. In particular, the upper surface opening 20c of the recess 20 is made slightly larger than the hole diameter of the nozzle portion 65 so that the recess 20 for air-conditioning air is not blocked by the buttocks Bu and the thigh TH when the occupant is seated. In the recess 20 with which the back side of the thigh abuts, a two-step recess 20 is formed as shown in FIGS. The lower depression 22 has a diameter that is slightly larger than the hole diameter of the nozzle portion 65, and the upper depression 21 forms a laterally elongated opening extending in the vehicle width direction. It flows out smoothly through the gap. Side walls 21b and 22b having a predetermined height are secured in the upper dent 21 and the lower dent 22 so that the air-conditioned air flows out smoothly (FIG. 8). In the figure, reference numeral 21 a denotes the bottom surface of the upper depression, reference numeral 20 b denotes the side wall of the main part depression 20, and reference numeral 30 b denotes the side wall of the side depression 30.

The nonwoven fabric 91 has a size that can cover at least the duct 5. The seat pad 1 is integrally foam-molded by inserting the nonwoven fabric 91, and the nonwoven fabric 91 is attached to and integrated with the back surface 1 b of the seat pad 1 covering the duct 5. In the present embodiment, the non-woven fabric 91 is integrated with the seat pad 1 so as to cover the entire seat pad back surface 1b except for the air introducing cylinder portion 61 protruding from the seat pad back surface 1b as shown in FIGS.
In the seat pad 1 that is integrally foamed by inserting the duct 5 along the back surface 2b of the main portion 2, the adhesiveness between the seat pad 1 made of urethane foam or the like and the duct 5 made of polypropylene resin or the like is poor. . Since the distribution duct main part 6 is arranged along the back surface of the main part 2, there is a possibility that the duct 5 may be broken due to elastic deformation of the seat pad 1 due to passenger seating or the like. The nonwoven fabric 91 covers the duct 5 and is integrally attached to the back surface 1 b of the seat pad 1, thereby eliminating the duct 5 from falling off the seat pad 1. While the duct 5 is set in the lower mold cavity, the nonwoven fabric 91 is set in the upper mold cavity, the foamed resin material is injected into the lower mold, the mold is closed, the foam is cured, and the duct 5 is covered with the nonwoven fabric 91. Thus, the seat pad 1 with the duct 5 attached is prepared.

The skin 99 is a sheet that covers at least the occupant contact side of the seat pad 1 (FIG. 4), and a fabric skin 99 having air permeability, a perforated leather skin provided with many small holes, or the like is used.
A seat cushion S with a duct is completed by putting the skin 99 on the seat pad 1 with the duct 5 in which the nonwoven fabric 91 is adhered and integrated. The skin 99 is stretched by engaging a hog ring clip provided on the back surface of the skin 99 with a hog ring part 42 or the like disposed in the skin tension hanging groove 41 provided on the front surface 1a of the seat pad 1. . The desired air-conditioned air from the blower unit passes through the duct 5 and the recess 20 (30) and further through the outer skin 99 to reach the passenger M seated on the seat cushion S, thereby obtaining a desired seat cushion S with duct (FIGS. 1 to 3). Fig. 8).

FIG. 6 is another embodiment around the recess 20 and the nozzle portion 65, and is a partially enlarged view of FIG. In the present embodiment, the bellows portion 8 is provided in the vertical cylindrical portion 6a of the distribution duct main portion 6 and the distribution duct sub-portion 7, but the bellows portion 8 is provided in the nozzle portion 65 of the distribution duct main portion 6 as shown in FIG. Can also be provided. If the bellows portion 8 is provided in the nozzle portion 65, the bellows portion 8 can directly contract and deform to follow the load when the occupant is seated from above the nozzle portion 65. Along with this, it becomes more preferable.
Moreover, you may provide the bellows part 8 in the horizontal cylinder part 6b of the distribution duct main part 6, like FIG. 9 of Embodiment 2 mentioned later. When the occupant M is seated on the main part 2, the main part 2 is recessed in the center and curved in the vehicle width direction, but the bellows part 8 provided in the horizontal cylinder part 6b follows the bending deformation, and the sitting comfort is improved. keep.

In FIG. 3, the tongue-like clip stopper 68 is shown by a chain line. The clip stopper 68 is integrally formed with the distribution duct main portion 6. A tongue-like clip stopper 68 is formed in the distribution duct main portion 6 so as to protrude, and the clip stopper 68 is disposed in a hanging groove 41 for covering the skin provided on the surface 1 a side of the seat pad 1. A clip stopper 68 extending from a part of the duct 5 is provided with a mounting hole 69 and constitutes a hog ring part 42 as an alternative to the hog ring wire. Reference numeral 67 denotes a locking tongue for setting the duct 5 to the lower mold when the duct 6 is insert-molded, and reference numeral 671 denotes a through hole.
In addition, since air-conditioning air blows out from the surface of the seat cushion S through the skin 99 from the plurality of depressions 20 (30), the drift in the duct flow path 60 (70) is suppressed, and from each depression 20 (30). In view of the necessary air volume to be blown out, the shape of the duct 5, the hole diameter of the nozzle portion 65 (75), and the shape of the recess 20 (30) are appropriately selected. For example, as shown in FIG. 3, the distribution duct sub-part 7 is slightly shifted from the horizontal cylinder part 6b in the vehicle front-rear direction and extends outward from the vertical cylinder part 6a, thereby suppressing the drift of the air-conditioning air.

(2) Embodiment 2
This embodiment is a seat cushion S as shown in FIG. This figure is a sectional view of the seat pad 1 with the duct 5 with the skin 99 removed, and corresponds to the sectional view taken along the line IX-IX in FIG. In order to make the drawings easy to understand, hatching representing a cross section of the seat pad 1 is omitted.

A duct 5 extends a distribution duct sub-part 7 from a distribution duct main part 6, and the distribution duct sub-part 7 has a vertical duct part 7 a via a conduit part 7 b arranged on side parts 3 provided on both sides of the main part 2. Established. The cross-sectional area of the vertical duct portion 7 a that runs in the vehicle longitudinal direction related to the distribution duct sub-portion 7 is made larger than the cross-sectional area of the vertical cylinder portion 6 a that runs in the vehicle longitudinal direction related to the distribution duct main portion 6. Then, the pad thickness t ₂ from the surface 3 a of the side portion 3 to the vertical duct portion 7 a is made smaller than the pad thickness t ₁ from the surface _{2 a} of the main portion 2 to the distribution duct main portion 6. Here, the pad thickness t ₂ ranging from the surface 3a of the side portion 3 in the vertical duct portion 7a is an area in the side portion surface 3a, it refers to the shortest distance of the pad thickness from the surface 3a to the vertical duct portion 7a. The pad thickness t ₁ from the surface 2a of the main part 2 to the distribution duct main part 6 is the shortest distance pad from the surface 2a to the distribution duct main part 6 excluding the area of the depression 20 in the region of the main part surface 2a. Refers to thickness.

Since the conditioned air is distributed and supplied from the vertical tube portion 6a of the distribution duct main portion 6 to the vertical duct portion 7a of the terminal distribution duct sub-portion 7, the cross-sectional area of the vertical duct portion 7a is larger than that of the vertical tube portion 6a. It is small in nature. However, here, as shown in FIG. 9, by increasing the cross-sectional area of the vertical duct portion 7a, that is, by increasing the diameter of the vertical duct portion 7a, the support of the side portion 3 is achieved with the rigidity of the resin vertical duct portion 7a. To improve performance. A duct diameter of the resin-made vertical duct portion 7a larger than the duct diameter of the vertical tube portion 6a, and the pad thickness t ₂ from the side area surface 3a to the vertical duct portion 7a, the distribution duct main portion from the main portion surface 2a 6 and smaller than the pad thickness t ₁ up, by bringing the outer peripheral surface of the vertical duct portion 7a to the side section surface 3a, even using the same pad material as the main portion 2, to stiffen the hardness of the side portion 3 Gives the same effect. Furthermore, by increasing the cross-sectional area of the vertical duct portion 7a, whereas the pad thickness t ₂ of the side portion 3 becomes thinner, the greater the channel portion 70 of the vertical duct portion 7a, leads to the vehicle weight. In FIG. 9, other configurations are the same as those in FIGS. 9, the same reference numerals as those in FIGS. 1 to 8 denote the same or corresponding parts.

(3) Embodiment 3
This embodiment is a seat cushion with a duct as shown in FIG. 10, which shows a cross-sectional view of the seat pad 1 with a duct 5 with the skin removed. In order to make the drawings easy to understand, hatching representing a cross section of the seat pad 1 is omitted. FIG. 10 is a cross-sectional view in the vehicle width direction, in which the vertical cylinder portion 6a of the distribution duct main portion 6 of the resin duct 5 is arranged in the vehicle front-rear direction along the both side corners of the main portion back surface 2b. By providing the vertical cylinder part 6a along the both side corners of the main part back surface 2b related to the seat pad 1, the rigid resin vertical cylinder part 6a satisfactorily supports and supports the occupant's collar Bu seated on the main part 2. As shown in the drawing, a hypotenuse portion hy arranged to face the occupant's buttock Bu seated on the main portion 2 is provided in the cross-sectional shape of the vertical cylinder portion 6a. The hypotenuse part hy is arranged so as to face the occupant buttock Bu seated on the main part 2. With such a configuration, the vertical cylinder portion 6a exerts a role of maintaining a good occupant posture even when the vehicle travels in a lateral direction. It becomes possible to hold the occupant's buttock Bu more stably, which is more preferable. In addition, as shown by the chain line in FIG. 10, even when the side portion back surface 3b forms the seat pad back surface 1b, the vertical cylinder portion 6a is provided along the side corners of the main portion back surface 2b. In FIG. 10, other configurations are the same as those in FIGS. 10, the same reference numerals as those in FIGS. 1 to 8 denote the same or corresponding parts.

(4) Embodiment 4
This embodiment is a seat cushion S as shown in FIGS. 11 and 12, and the illustration of the skin 99 is omitted. 11 is a cross-sectional view corresponding to FIG. 5, and FIG. 12 is an enlarged view of a main part of FIG. In the first embodiment, a plurality of nozzle portions 65 are erected on the surface side of the distribution duct main portion 6, and the front end port 65 a of each nozzle portion 65 is an air discharge port 64, but here, the nozzle portion 65 is not provided and distribution is performed. On the surface side of the duct main portion 6, specifically, directly on the upper surface of the distribution duct main portion 6, the air distribution duct 5 is provided with a plurality of air discharge ports 64. Distance from FIG. 5, the nozzle tip opening 65a to the main portion surface 2a can be said pad thickness t ₁ of the shortest. In the ease of manufacturing the duct 5 by blow molding, the first embodiment (FIG. 5) is superior to the present embodiment. However, in the seat cushions of FIGS. 11 and 12, the pad thickness t ₁ is the distance from the air discharge port 64 directly opened in the distribution duct main part 6 to the main part surface 2a, and the main part 2 is equivalent to the absence of the nozzle part 65. This has the advantage that the pad thickness HT can be further reduced (FIG. 11). Reference numeral 641 denotes an opening edge of the air discharge port 64. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted. 11 and 12, the same reference numerals as those in FIGS. 1 to 8 denote the same or corresponding parts.

(5) Effect The seat cushion S with a duct configured as described above has a recess 20 in which an air discharge port 64 directly opened in the duct or a front end port 65a (75a) of each nozzle portion 65 (75) is provided at a necessary location. (30) and conducting to the recess 20 (30), respectively, and the air introduction port 62 is viewed through the back surface 1b of the seat pad 1, so that air-conditioned air passes through the duct 5 from the air introduction port 62. The temperature of the surface of the seat cushion S can be quickly adjusted through the depression 20 (30) and the outer skin 99. The air-conditioned air is sent to the occupant M sitting on the duct-containing seat cushion S from various places where the depressions 20 (30) are provided, thereby enabling smooth temperature adjustment of the seat cushion surface.

  On the other hand, the distribution duct main portion 6 is provided so as to run vertically and horizontally along the back surface 2b of the main portion 2, and the seat pad 1 is integrally formed with the duct 5, so that the sitting comfort is also satisfied. Unlike the “molded body having an air distribution passage extending along the sheet surface” of Patent Document 1, the distribution duct main portion 6 is disposed along the back surface 2b of the main portion 2, and therefore, above the distribution duct main portion 6. The main part 2 having a sufficient cushioning property is sufficiently thick to provide a comfortable sitting comfort. And since the vertical cylinder part 6a and the horizontal cylinder part 6b which concern on the distribution duct main part 6 are the ducts 5 which run only vertically and horizontally, the bending of the urethane pad which is elastically deformed by the pressure applied when the passenger is seated is It is not blocked like a planar member. Good sitting comfort is obtained. Riding comfort and seating performance are maintained without reducing the air conditioning function. Furthermore, since it has such a duct structure, when the seat pad 1 is integrally formed by inserting the duct 5 into the lower mold, a place where the foaming raw material can be injected into the lower mold can be freely selected.

  Further, since the duct 5 is formed with the bellows part 8 interposed in the middle of the path, the duct 5 has good followability to the deformation of the seat pad 1 when seated on the occupant even in the seat cushion S with the duct, The occupant M is not given an uncomfortable feeling that the duct 5 exists. Even if the bellows portion 8 is interposed in the middle of the duct 5, the duct 5 with the bellows portion 8 can be easily manufactured at a relatively low cost by blow molding.

Furthermore, when the cross-sectional shape of the distribution duct main portion 6 is a flat shape having a wide horizontal width x with respect to the vertical height y (FIGS. 5 and 6), the load applied to the passenger seat in the vertically downward direction is The duct 5 can easily follow the deformation. When the side wall portion 6a ₂ extending in the vertical direction of the distribution ducts main portion 6 is formed in the lateral cross section arcuate become more flexible duct 5 is further no seat pad of regions and the duct 5 of the seat pad 1 duct 5 there The difference in deflection characteristics in the region 1 is further reduced. The riding comfort and sitting comfort of the occupant M on the ducted seat cushion S are further improved.
More specifically, the vertical cylinder portion 6a is arranged along the both side corners of the main portion back surface 2b related to the seat pad, and is arranged so as to face the occupant's buttock Bu seated on the main portion 2 in the cross-sectional shape thereof. By having the hypotenuse part hy, it becomes possible to catch the occupant at the hypotenuse part hy even if the vehicle is subjected to lateral acceleration, so that an excellent effect of maintaining a good occupant posture is also exhibited.

Further, as shown in FIG. 9, the area of the cross section of the vertical duct portion 7 a that runs in the vehicle longitudinal direction of the side portion 3 is larger than the area of the cross section of the vertical cylinder portion 6 a that runs in the vehicle longitudinal direction related to the distribution duct main portion 6. increased, and the pad thickness t ₂ from the side area surface 3a to the vertical duct portion 7a, when smaller than the pad thickness t ₁ of the main portion surface 2a to the distribution duct main portion 6, a resin vertical duct section there is a rigid Since the surface of 7a approaches the surface 3a of the side part 3, side support property improves. Even if the same material as the main part 2 is used for the foam material of the side part 3, the same effect as that obtained by increasing the hardness of the side part 3 can be obtained. Furthermore, if the cross-sectional area of the vertical duct portion 7a is increased, the cross-sectional area of the hollow duct flow path 70 is correspondingly increased, leading to a reduction in foaming material costs and a reduction in vehicle weight.

  In addition, when the seat pad 1 is integrally foamed with the nonwoven fabric 91 inserted, and the nonwoven fabric 91 is covered and integrated with the back surface 1b of the seat pad 1 between the duct 5 and the seat pad 1, Even if it is in the seat pad 1 with the duct 5 which is inferior to adhesiveness, both sense of unity is raised. Since the non-woven fabric 91 strongly bonds and maintains the duct 5 to the seat pad 1, the problem that the duct 5 peels off due to elastic deformation of the seat pad 1 is eliminated.

Further, when the upper surface opening 20c of the recess 20 provided in the surface 2a of the main portion 2 related to the seat pad 1 is made larger than the front end opening 65a of the nozzle portion 65 that is aligned with the recess 20 and is conducted, the occupant is seated on the seat cushion S. It is possible to prevent M from sitting and closing the recess 20. A gap through which air-conditioned air blows out can be formed between the occupant's buttocks Bu and thigh TH, and the temperature-adjusted air can be reliably sent to the occupant M. Further, even if the air-conditioning air passing through the nozzle portion 65 has a speed, by making the upper surface opening 20c of the recess 20 larger than the nozzle portion front end opening 65a, the speed is reduced at the upper surface opening 20c and the recess 20 Since air whose temperature is adjusted in a wide range is sent from the large upper surface opening 20c to the buttock Bu and thigh TH of the occupant M, more comfortable temperature adjustment is possible.
Furthermore, if the clip stop portion 68 is formed integrally with the duct 5 so as to protrude and can serve as the hog ring portion 42 as an alternative to the hog ring wire, the cost of the duct seat cushion can be reduced.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. Shape, size, number, material of seat pad 1, main part 2, side part 3, suspension groove 41, duct 5, distribution duct main part 6, distribution duct sub-part 7, bellows part 8, nonwoven fabric 91, skin 99, etc. Etc. can be suitably selected according to the application. For example, all of the other parts may be the duct 5 formed of the bellows portion 8 while leaving the portion of the air introduction cylinder portion 61 that requires rigidity. It becomes easier for the duct 5 to follow the deformation of the seat pad 1. In order to make the air distribution amount from each recess 20 uniform, the hole diameter of the air discharge port 64 and the nozzle diameter of the nozzle portion 65 may be set larger as the distance from the air introduction port 62 increases.

1 Seatpad 1a Surface (Seatpad surface)
1b Back side (back side of seat pad)
2 Main part 2b Back side (back side of main part)
20 hollow 20c upper surface opening 3 side part 5 duct for air distribution (duct)
6 Distribution duct main part 6a Vertical cylinder part 62 Air introduction port 64 Air discharge port 65 Nozzle part 65a Tip port 68 Clip stop part 7 Distribution duct sub part 7a Vertical duct part 8 Bellows part 91 Non-woven fabric Bu collar part (occupant collar part)
S Seat cushion hy Inclined part t ₁ , t ₂ Pad thickness x Horizontal width y Vertical height

Claims (8)

A seat cushion (S) that constitutes a seat portion of a vehicle seat, wherein a seat pad (1) is provided with a plurality of depressions (20) on a surface (1a) on an occupant contact side, and a main body related to the seat pad The distribution duct main part (6) is provided to run vertically and horizontally along the back surface (2b) of the part (2), and further, the air introduction port (62) is formed on the back side of the distribution duct main part (6), A distribution duct (5) having a plurality of air discharge ports (64) on the surface side of the distribution duct main portion (6), and a non-woven fabric (91) ; and the seat pad (1) The duct (5) for air distribution and the nonwoven fabric (91) are inserted and integrally foamed, the air discharge port (64) is aligned with the recess (20), and the duct internal flow path (60) is recessed. (20) The inside of the seat pad (1) is electrically connected to the back surface (1b) of the air introduction port (62) , and the nonwoven fabric (91) covers the air distribution duct (5). The seat pad (1 ) A seat cushion with a duct, which is integrally attached to the back surface (1b) . The nozzle part (65) is standingly arranged by the surface side of the said distribution duct main part (6), The front-end | tip opening (65a) of each nozzle part (65) is made into the said air discharge port (64). Duct seat cushion. The duct cushion according to claim 1 or 2, wherein the air distribution duct (5) is formed with a bellows portion (8) interposed in the middle of the path. The air distribution duct (5) extends from the distribution duct main part (6) to the distribution duct sub part (7), and the vertical duct part (7a) of the distribution duct sub part (7) is connected to the main part ( 2) The cross-sectional area of the vertical duct portion (7a) that is disposed on the side portions (3) provided on both sides of the distribution duct and that runs in the vehicle front-rear direction is the longitudinal section that runs in the vehicle front-rear direction related to the distribution duct main portion (6). A pad thickness (t2) from the surface (3a) of the side portion (3) to the vertical duct portion (7a) is made larger than the cross-sectional area of the cylindrical portion (6a), and the surface of the main portion (2) The seat cushion with duct according to any one of claims 1 to 3 , wherein the seat cushion is smaller than a pad thickness (t1) from (2a) to the distribution duct main part (6). The cross-sectional shape of the distribution duct main part (6) is a flat shape having a wide horizontal width (x) with respect to the vertical height (y), and the side wall portion (6a2) extending in the vertical direction is formed in an arc shape. The duct seated cushion according to any one of claims 1 to 4 . Claims wherein provided on the surface of the seat pad (1) (1a) depression a top opening (20c) of (20), is greater than the air discharge opening to conduct in alignment in the depressions only (20) (64) Item 6. A duct cushion with a duct according to any one of Items 1 to 5 . A tongue-like clip stopper (68) is formed to protrude from the distribution duct main part (6), and the clip stopper (68) is provided on the surface (1a) side of the seat pad (1) for hanging the skin. The ducted seat cushion according to any one of claims 1 to 6 , wherein the seat cushion is disposed in the groove (41). A vertical tube portion (6a) running in the vehicle longitudinal direction related to the distribution duct main portion (6) is disposed along both side corners of the back surface (2b) of the main portion, and the main portion has a cross-sectional shape. The seat cushion with a duct according to any one of claims 1 to 7 , further comprising a hypotenuse portion (hy) arranged to face an occupant's buttocks (Bu) seated on (2).

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