JP5489161B2 - Ducted seat cushion - Google Patents

Description

  The present invention relates to a seat cushion including a duct, in which a duct is integrated by insert molding.

  Seat cushions that make up the seats and backrest of seats mounted on vehicles such as automobiles are the parts where the occupant sits down and touches directly. It may feel cold. For these reasons, seat seats have been proposed that can provide temperature-adjusted air by providing an air distribution passage inside the seat pad (for example, Patent Documents 1 to 3).

JP 2000-125990 A Japanese Utility Model Publication No. 61-55858 JP 2000-52747 A

  However, in any of the inventions of Patent Documents 1 to 3, the seat pad and the duct such as the air flow path forming means that become the air distribution passage are separate seat cushions. After building the seat pad and the duct separately, both had to be assembled in a later process, which forced the assembly work burden. Conventionally, there is no seat cushion with a duct in which a duct such as an air blowing path forming unit is integrally foam-molded in a seat pad. Even if the duct is integrally foam-molded in the seat pad, the seat pad in which the duct is embedded interferes with the duct, and it is difficult to connect the duct to the upstream connecting pipe.

  The present invention solves the above problem, eliminates the burden of assembling the seat pad and the air duct, and facilitates the connection between the air duct and the upstream connecting pipe. It is an object of the present invention to provide a seat cushion with a duct that improves the workability of attaching a wind duct and a connecting pipe.

In order to achieve the above object, the gist of the invention described in claim 1 is a seat cushion (S) constituting a vehicle seat, wherein an air outlet (20) is provided on a surface (1a) on the passenger contact side. A plurality of seat pads (1), and an air duct (5) disposed in the seat pad and communicated with the air outlets (20) through the air outlets (64). on the back side of the use duct (5), an air inlet tube portion and a overhangs outwardly cylindrical body comprising the air inlet (e) and (61a) from the tubular member (61a) the flange (61b) (61 ) Projectingly formed, and the seat pad (1) is integrally foam-molded by inserting the air distribution duct (5), and the portion of the seat pad back surface located on the back side of the flange (61b) ( 1b ₂ ) is provided with a stepped portion (12) that is one step higher than the seat pad back surface (1b ₁ ) around the outer region than the portion, and the tip surface (121) of the stepped portion (12) is the flange (61b) is a ducted seat cushion characterized by being in contact with the rear surface of (61b).
A seat cushion with a duct according to a second aspect of the present invention is the seat cushion with a duct according to the first aspect, wherein the air distribution duct (5) includes the foamed seat pad (1) and a non-adhesive resin duct. Features. A ducted seat cushion according to a third aspect of the present invention is the seat cushion according to the first or second aspect, further comprising a non-woven fabric (91), wherein the seat pad (1) is integrally foam-molded by inserting the non-woven fabric (91), and The nonwoven fabric (91) is not disposed on the step (12) of the back surface (1b) of the seat pad (1). A ducted seat cushion according to a fourth aspect of the present invention is the duct cushioning seat cushion according to the first to third aspects, wherein the release agent (k) is applied to the flange (61b) and the cylindrical body (61a) in contact with the stepped portion (12). It is characterized by that.

  The seat cushion with a duct according to the present invention eliminates the work of assembling the air distribution duct and the seat pad required so far by inserting the air distribution duct and integrally foaming the seat pad. It facilitates the connection between the wind duct and the upstream connecting pipe, and exhibits excellent effects such as improving the installation work of the wind duct and connecting pipe.

It is a perspective view of the seat pad with a duct which omitted the skin in one form of the seat cushion with a duct of the present invention. 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. 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 IV-IV line arrow directional view of FIG. It is the VV line arrow directional view of FIG. It is the elements on larger scale of FIG. FIG. 6 is an enlarged cross-sectional view around the air introduction tube portion of FIG. 5. It is an expanded sectional view which shows a mode that the connection pipe was connected with the air introduction cylinder part of FIG. FIG. 9 is a schematic explanatory diagram illustrating a state of a load applied to the stepped portion by the coupling fastener in coupling of the air introduction tube portion and the connection pipe. FIG. 7 and FIG. 8 are comparison views, in which (A) is an enlarged cross-sectional view around an air introduction cylinder without a step portion, and (B) is an enlarged cross-section showing a connection duct connected to the air introduction cylinder. FIG. It is a schematic explanatory drawing which shows the mode of the load which the fastener for a connection gives to a step part by connection with an air introduction cylinder part and a connection duct in FIG.10 (b). It is a schematic sectional drawing of the foaming type | mold which foam-molds the sheet pad with a ventilation duct of FIG. 10 (a).

Hereinafter, the seat cushion with a duct according to the present invention will be described in detail. 1 to 9 show one embodiment of the ducted seat cushion of the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a perspective view of a duct for air distribution, and FIG. 3 is a perspective view of the ducted seat cushion of FIG. 4 is a perspective view taken along line IV-IV of FIG. 2, FIG. 5 is a view taken along arrow VV of FIG. 1, FIG. 6 is a partially enlarged view of FIG. 1, and FIG. FIG. 8 is a cross-sectional view of a state in which a connecting pipe is connected to the air introduction tube portion, and FIG. 9 is an explanatory view showing the relationship between the fastener and the stepped portion in the connection of FIG.
In order to make the drawings easy to understand, FIG. 1 omits the illustration of the skin, and FIGS. 7 and 8 omit the illustration of the nonwoven fabric. In FIG. 5, in order to make the duct flow path easy to understand, the horizontal cylinder portion and the air introduction cylinder portion relating to the distribution duct main portion are drawn on the same cross section for convenience.

  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 ducted seat cushion S is used for a seat portion and a backrest of a vehicle seat. The lower part of the occupant M on which the seat is seated is received and supported (Fig. 5). Protect.

  Hereinafter, the seat pad 1 of the present embodiment is an example used for the seat portion. 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 FIGS. 1 and 5, the seat pad 1 rich in cushioning properties supports a main portion 2 that supports the occupant's buttocks and thighs, and side portions of the buttocks and thighs on both sides of the main portion 2. It is roughly divided into the side part 3. 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 an epidermis 99 to be attached in a later process (FIG. 1). 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 both longitudinal grooves 41a is formed in the vehicle width direction. Reference numeral 42 denotes a hog ring unit.
On the surface 1a of the seat pad 1 on the occupant contact side, a plurality of depressions for the air outlets 20 from which the air-conditioning air is blown out are provided at a necessary location. In the present embodiment, six air outlets 20 are provided in the main portion 2. And the duct 5 which aligned the air ejection port 64 to each hollow 20 is arrange | positioned.

  The duct 5 is a resin tubular member disposed in the seat pad 1, and the duct 5 is aligned with the air outlets 20 on the surface side of the duct 5. Is opened. In the present embodiment, the distribution duct main portion 6 of the duct 5 is provided so as to run vertically and horizontally along the back surface 2b of the main portion 2 related to the seat pad 1, and a short pipe is provided on the surface side of the distribution duct main portion 6. A plurality of nozzle portions 65 for the air jets 64 are provided (FIGS. 2 and 4). The duct 5 is inserted into the air outlets 20 so that the air outlets 64 of the tip ends 65a of the nozzle portions 65 are aligned with the air outlets 20, and then the foam pad 5 is formed by foam molding of the seat pad 1. It is integrated with the pad 1.

The duct 5 of the present embodiment runs in the vehicle width direction at a substantially center between the pair of vertical tube portions 6a and the pair of vertical tube portions 6a that run in the vehicle longitudinal direction at intervals slightly narrower than the interval between the pair of vertical grooves 41a. With the horizontal cylinder part 6b which connects both the vertical cylinder parts 6a, it has the distribution duct main part 6 of the air distribution flow path 60 which was substantially H-shaped in plan view as shown in FIG. The distribution duct main part 6 is arranged along the back surface 2b of the main part 2, and the air outlet 64 of each nozzle tip 65a is aligned with the air outlet 20, and the duct internal flow path 60 is provided in the air outlet 20. The seat pad 1 is integrally foam-molded with the duct 5. As shown in FIGS. 4 and 5, the distribution duct main portion 6 is arranged along the main portion back surface 2 b and the seat pad 1 is integrally formed. Therefore, even if the duct 5 exists, the distribution duct main portion 6 is located above the distribution duct main portion 6. Thus, a sufficient pad thickness is secured in the main portion 2 where the occupant M sits.
4 and 5, a part of the distribution duct main part 6 is exposed on the back surface 1b of the seat pad 1 and is disposed along the back surface 1b of the seat pad 1. 6 may be completely embedded in the seat pad 1.

  On the other hand, on the back side of the distribution duct main portion 6 related to the duct 5, an air introduction cylinder portion 61 having a cylinder body 61a serving as an air introduction port e and a flange 61b projecting outward from the cylinder body is provided. . On the back side (lower surface side) of the distribution duct main portion 6, an air introduction cylinder portion 61 having a cylinder opening as an air introduction opening e is erected. The air introduction cylinder part 61 is erected at the center of the back surface of the horizontal cylinder part 6b and protrudes from the center of the back surface of the seat cushion S as shown in FIGS. On the back surface 1b side of the seat pad 1, an air introduction port e, which is a tip end of the air introduction tube portion 61, is looked into, and the air introduction port e is connected to the blower unit through a connecting pipe.

Specifically, on the back surface side of the distribution duct main portion 6 according to the duct 5, a cylinder 61a for the air introduction port e and a flange 61b projecting outward from the cylinder are provided. The air introduction cylinder portion 61 is formed so as to protrude on the rear surface side of FIG. Furthermore, the seat pad 1 is integrally foamed by inserting the duct 5, but the seat pad back surface ₁ b ₁ around the outer region than that portion is formed in the seat pad back surface portion 1 b ₂ located on the back surface 61 b ₂ side of the flange 61 b. Compared to FIG. 7, a step 12 that is one step higher is provided (FIG. 7). A portion 1b ₂ where the flange 61b is located is raised by foam molding of the seat pad 1 to form a stepped portion 12 of the seat pad 1 with respect to the outer back surface 1b ₁ of the seat pad 1 which is located outside the flange 61b. To do. Then, the distal end surface 121 of the step portion 12 abuts against the rear surface 61b ₂ of the flange 61b. The “rear surface of the flange 61b” refers to a flange surface facing the distribution duct main portion 6 side in FIG.
An air introduction cylinder portion 61 protrudes on the back side of the distribution duct main portion 6, and the seat 61 covers the cylinder body 61 a and the flange back surface 61 b ₂ of the air introduction cylinder portion 61, but a flange fastening surface 61 b ₁ with the mating flange is provided. The step 12 of the seat pad 1 is formed at the location of the flange back surface 61b ₂ that is exposed.

Thus, abutting the flange D ₂ provided in connection pipe D and a flange 61b provided in the air introduction tube 61, it can be fastened both flanges 61b, the D ₂ with fasteners P such as a clip or rivet. Reference numeral _{D 1} indicates a tube body of the connecting pipe D, 7 and 8, unlike 3-5, the flange 61b than the protruding end 61a ₁ of the cylindrical body 61a slightly to the cylindrical body proximal side It is shown retracted. After the air introduction cylinder part 61 and the connection pipe D are connected, air-conditioned air is supplied from the blower unit to the air introduction port e via the connection pipe D. As shown in FIG. 4, the conditioned air passes through the duct 5 forming the air distribution channel 60, passes through each nozzle tip port 65a, and blows out from the upper surface opening 20c of the recess.

Meanwhile, the duct 5 mixed sheet pad 1 according to the present duct containing the seat cushion S is on the back side portion 1b ₂ of the flange 61b, as compared with the rear surface 1b ₁ of the outer zone around the flange 61b, the provision of the stepped portion 12 raised one step Accordingly, the flanges 61b by fasteners P such as a clip, smoothly coupling D _2. If the step 12 is not provided, a troublesome problem is encountered.

When the seat pad 1 is foam-molded by inserting the air introduction cylinder portion 61 with the flange 61b, a foam mold T as shown in FIG. 12 is usually used. In Figure 12, reference numeral T ₂ are lower mold, reference numeral T ₁ upper mold, reference numeral j denotes a hinge portion, the duct 5, the distribution ducts main portion 6, a nozzle portion 65 ease shown. Duct mixed sheet pads foam molding with foam-type T in FIG. 12, to set a duct 5 to the lower die T _2, slip portion 19 of the seat pad 1 is always present on the back of the fastening flange 61b (A in FIG. 10). Therefore, the flanges 61b for connecting the connection pipe D and the air introduction tube 61, binding work D ₂ becomes difficult.
As shown in FIG. 10 (b), for example, the height of the rivet as the fastener P is bent by 10 mm or more to connect the connecting pipe D. However, a very strong force is required for bending. When the flange back surface 61b ₂ of the seat pad ₁ and the seat pad back surface 1b ₁ existing in the outer region of the flange 61b are flush with each other, the front end P _{1 of the} fastener P such as a rivet needs to be pressed against the seat pad 1 When trying to bend the height, the seat pad 1 is made of an elastic body, and therefore, it is necessary to bend not only the place where it is pressed but also the entire surrounding area where the elastic deformation spreads. In Figure 10, recess symbol F is the deflected by it, reference numeral F ₁ denotes an outer peripheral edge thereof. Referring to FIG. 11, when the height of the rivet as the fastener P is bent, an external force is required to bend the large range of the diameter d that the seat pad 1 follows by elastic deformation. A large burden is imposed on the connection work with the connecting pipe D. Prior to the flange connection between the connection pipe D and the air introduction tube 61 as improvement, although a hole corresponding also conceivable seat pad 1 tip P ₁ of the fastener P strikes, also becomes necessary extra working steps .

On the other hand, the seat pad 1 with the duct 5 according to the present invention has a seat pad back surface 1b ₁ positioned on the periphery of the outer region than the flange 61b in a portion 1b ₂ on the back surface of the seat pad disposed on the back surface 61b ₂ side of the flange 61b. Compared to the above, the stepped portion 12 is one step higher. Therefore, when the height of the rivet as the fastener P is bent, the range of the seat pad 1 that follows the deformation by the bending is reduced, and the force required for the bending can be reduced. In the foam molding of the seat pad 1, the front end surface 121 of the stepped portion 12 comes into contact with the back surface 61 b ₂ of the flange 61 b, but the fastener P is inserted into the hole 61 b _{3 of the} flange 61 b and the height of 10 mm or more is bent. This is advantageous because the range of the seat pad 1 required is limited to the area width W of the flange 61b. The area width W of the flange 61b is smaller than the diameter d of FIG. A fastener P such as a rivet is inserted into the flange hole, and only the portion of the step 12 having the height h ₁ and the area width W of the front end surface 121 in the state shown in FIGS. as 9 (b), sufficient only force submerged up to a height h ₂ in fasteners P, the connection between the connecting pipe D the air introduction tube part 61b proceeds smoothly.

Here, it is more preferable to use a foam-molded sheet pad 1 and a non-adhesive resin duct for the duct 5. In the case of a resin duct having poor adhesion to the integrally foamed seat pad, the step height h ₁ is set using a fastener P such as a rivet by the flange connection between the air introduction tube portion 61 and the connection pipe D. when plunging from the stepped portion height h ₂ (FIGS. 7-9), the step portion 12 is the duct 5 (details air introduction tube portion 61) without being detained, depending on devoted force pushing the fastener P The reason for this is that it bends smoothly from FIG. 7 to FIG. "The foamed sheet pad 1 and non-adhesive resin duct" means that when the seat pad 1 is a urethane foam, it is a resin duct that is difficult to adhere to the urethane foam even if it is inserted by foam molding. Specifically, it refers to a duct made of thermoplastic resin such as polypropylene resin and polyethylene resin. In the present embodiment, urethane foam is used for the seat pad 1, and a polypropylene resin duct is used for the duct 5. For this reason, the flange connecting operation between the air introduction cylinder 61 and the connecting pipe D can be performed more smoothly.

  Further, as shown in FIG. 7, it is even more preferable that a release agent k is applied to the flange 61b and the cylindrical body 61a in contact with the stepped portion 12. When the air introduction cylinder 61 and the connecting pipe D are flange-coupled (FIG. 8), the step 12 smoothly slides on the air introduction cylinder 61 according to the force pressed against the fastener P such as a rivet. This is because the step portion 12 is more smoothly bent and deformed from 7 to FIG.

  The seat pad 1 is integrally foam-molded by insert-molding a nonwoven fabric 91 on the back surface 1 b of the seat pad 1. As a result, abnormal noise due to rubbing between the seat frame and the seat pad 1 can be reduced. The non-woven fabric 91 is adhered and integrated with the back surface 1b of the seat pad 1 on the back surface 1b of the seat pad 1 other than the portion where the flange 61b exists. In this embodiment, the non-woven fabric 91 covers and integrates the distribution duct main portion 6 other than the area of the air introduction cylinder portion 61 on the back surface 1b of the seat pad 1 and is integrally attached to the seat pad back surface 1b. Specifically, the non-woven fabric 91 is an air introduction cylinder portion 61 protruding from the seat pad back surface 1b as shown in FIGS. 3 and 4, and includes a flange 61b exposed from the seat pad 1 and an area of the step portion 12 formed by the seat pad 1. The seat pad 1 is integrated with the seat pad 1 so as to cover almost the entire area of the rear surface 1b.

Since the non-woven fabric 91 is not disposed in the portion where the flange 61b exists, when the seat pad 1 is integrally foam-molded with the non-woven fabric, the stepped portion 12 is more reliably separated from the other seat pad back surface 1b. The ridge is formed on the back surface 1b of the seat pad.
By the way, when the nonwoven fabric 91 is disposed at the portion where the flange 61b is present, the sidewall of the stepped portion 12 and the nonwoven fabric 91 adhere to each other, and the nonwoven fabric covers the flange 61b. 1 (specifically, the step portion 12) is difficult to bend.

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 applying a skin 99 to 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 disposed in the skin tension hanging groove 41. When the connecting pipe D is connected, the desired air-conditioned air from the blower unit passes through the duct 5 and the recess 20 and further through the skin 99 to reach the occupant M sitting on the seat cushion S. Completed (Figs. 1-9).

The ducted seat cushion S configured as described above has a seat pad back surface portion 1b ₂ located on the back surface 61b ₂ of the flange 61b of the air introduction tube portion 61, compared with the seat pad back surface 1b ₁ around the outer region than that portion. since the stepped portion 12 of the seat pad 1 becomes higher by one step is provided, engaging the flange D ₁ of the connecting pipe D connected to the flange 61b and the blowing unit of the air introduction tube 61 is facilitated. Inserting the fastener P such as rivets flanges 61b, the hole of D _2, the pressing as in Figure 9 with fastener tip P ₁ the surface of the stepped portion 12 which is one step higher, 8 simply deflect this part The flange can be connected like this. In a general ducted seat pad made of a normal foam type T as shown in FIG. 12, the seat pad back surface 1b is flush with the periphery of the flange 61b, and the seat pad 1 is made of an elastic body. As shown in FIG. 10, the force pressed in the step propagates in a wide range, and the flange cannot be connected unless the wide range is bent. Flange 61b of the connecting pipe D the air introduction tube 61, the fastening of the D ₂ was very difficult.

On the other hand, the seat cushion S with the duct is formed by foaming the seat pad 1 and allows the sinking portion 19 in FIG. Eliminate the assembly work. The seat pad 1 is allowed to come into contact with the rear surface 61b _{2 of the} flange 61b, and the structure in which the seat pad 1 is integrally foamed by inserting the duct 5 is maintained, which is a problem in Patent Documents 1 to 3. Eliminate the burden of assembly work. On the other hand, the difficulty of the work of flange-joining the air introduction part 61 derived from the seat pad 1 by inserting the duct 5 and being integrally foamed and the connecting pipe D connected to the blower unit is a stepped part. 12 is formed and solved. The seat pad 1 is _only brought into contact with the rear surface 61b2 of the flange 61b as the front end surface 121 of the step portion 12, and only the range of the step portion 12 is elastically deformed as shown in FIGS. the flange 61b of the flange D ₂ of the connection pipe D to easily fastened by fasteners P such as rivets. In the seat pad 1 of FIG. 10 in which the flange back surface 61b ₂ and the seat pad back surface 1b ₁ in the outer region of the flange 61b are flush with each other and flat, the rivet height as the fastener P is bent by flange fastening. As shown in FIG. 11, the seat pad 1 has to bend a large range of the diameter d followed by elastic deformation, whereas the seat cushion S with the duct needs only the range of the step portion 12 (FIG. 8), and both flanges 61b , D ₂ can be fastened easily.

When the duct 5 is a foam-formed sheet pad 1 and a resin duct such as a non-adhesive polypropylene resin, the flange P between the air introduction cylinder 61 and the connecting pipe D is used to rivet the fastener P. when deflecting the height, from the duct 5 (air introducing tube portion 61) becomes easy to move it dissociates sheet pad 1, a flange 61b, the fastening operation of the D ₂ becomes easier.
In addition, if the release agent k is applied to the flange 61b and the cylindrical body 61a that are in contact with the stepped portion 12, the air introducing cylindrical portion 61 is more easily separated from the seat pad 1, so that the flanges 61b, D ₂ is extremely easy to fasten. Enjoyed the advantages of integral foam molding of the duct 5 containing seat pad 1, further, in this foam molding, the seat pad 1 contacting the flange back 61b ₂ are substantially completely solve the difficult problems of the flange fastening work causing newly.

  In addition, when the seat pad 1 is integrally foamed by inserting the nonwoven fabric 91 and the nonwoven fabric 91 is disposed on the back surface 1b of the seat pad 1 other than the step portion 12 which is the region of the air introduction cylinder portion 61, Abnormal noise due to rubbing between the seat frame and the seat pad 1 can be reduced, and the non-woven fabric covering the flange 61b does not adhere to the side wall of the step portion 12. Therefore, when the fastener P is inserted, the seat pad 1 ( The step 12) is deflected.

  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. The shape, size, number, material, and the like of the seat pad 1, the duct 5, the distribution duct main portion 6, the air introduction tube portion 61, the nonwoven fabric 91, the skin 99, and the like can be appropriately selected according to the application. For example, in the embodiment, the nozzle portion 65 for the air outlet 64 is provided, but without providing the nozzle portion 65, it is also possible to make a hole in the duct main portion 6 and directly provide the air discharge portion 64.

1 Seatpad 1a Surface (Seatpad surface)
1b Back side (back side of seat pad)
1b Seat pad back surface located on the back side of the ₁ flange 1b Seat pad back surface around the outer area than the ₂ flange back side portion 12 Step portion 121 Tip surface 20 Air outlet (dent)
5 Duct for air distribution (duct)
6 distribution duct main part 61 air introduction cylinder part 61a cylinder 61b flange 61b ₁ back 64 air outlet 91 non-woven fabric S seat cushion e air introduction port k release agent

Claims (4)

A seat cushion (S) constituting a vehicle seat, and a seat pad (1) provided with a plurality of air outlets (20) on a surface (1a) on the occupant contact side, and disposed in the seat pad And an air duct (5) communicating with an air outlet (64) to the air outlet (20), and on the back side of the air duct (5), the air inlet (e) An air introduction cylinder part (61) having a cylindrical body (61a) and a flange (61b) projecting outward from the cylindrical body (61a) ,
The seat pad (1) is integrally foam-molded by inserting the air distribution duct (5), and the part (1b ₂ ) on the back side of the seat pad located on the back side of the flange (61b), from the part Is provided with a step portion (12) that is one step higher than the back surface (1b ₁ ) around the outer region, and the tip surface (121) of the step portion (12) is in contact with the back surface of the flange (61b). Ducted seat cushion, characterized by The seat cushion with duct according to claim 1, wherein the duct (5) for air distribution uses a foam-molded seat pad (1) and a non-adhesive resin duct. Further comprising a nonwoven fabric (91), the seat pad (1) is integrally foamed by inserting the nonwoven fabric (91), and the step (12) on the back surface (1b) of the seat pad (1) The seat cushion with a duct according to claim 1 or 2, wherein the nonwoven fabric (91) is not disposed. The seat cushion with a duct according to any one of claims 1 to 3, wherein a release agent (k) is applied to the flange (61b) and the cylinder (61a) in contact with the stepped portion (12).

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