JP2018192213A - Seat pad - Google Patents

Abstract

To solve the problems that when burying an insertion member different from a seat pad constituent member in a seat pad, a discomfort, for instance, uneven hardness of the seat pad, occurs to an occupant seating on the seat pad, and deterioration of a seating feeling of the occupant seating on the seat pad, consequently, deterioration of riding comfortableness is caused.SOLUTION: A seat pad 10 including a cushion pad 11 which becomes a seat part in seating is such that: an insertion member 12 is buried in a front side of the cushion pad 11 with respect to a hip lower part arranged under the hip of a seating occupant; at least a seating surface side and a front end side of the insertion member 12 are covered without being exposed; and a deflection amount in a constant load in a seat pad insertion part buried with the insertion member 12 is larger at a seat pad rear side than that at a seat pad front side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seat pad.

2. Description of the Related Art Conventionally, as a seat pad that is a structure that forms a seat serving as a seat, for example, one used for an automobile seat is known. Since the seat pad used for this automobile seat needs to have appropriate hardness and softness in order to stably maintain the sitting posture of the seated occupant and ensure a comfortable sitting comfort, for example, It is made of a foamed material such as flexible polyurethane foam.
By the way, since the body temperature of the occupant is transmitted to the vehicle seat on which the occupant is seated, if the seat pad does not sufficiently dissipate heat, it is avoided that the seat pad is heated due to the transmitted body temperature. I couldn't. In addition, even when the vehicle is parked when the outside air temperature is high, such as under a hot sun, it is inevitable that the temperature of the vehicle seat increases and the seat pad heats up as the temperature in the vehicle rises.

If heat is trapped in the seat pad of the automobile seat, the occupant who continues to sit on the automobile seat will always receive the heat of the seat pad, resulting in discomfort. This will lead to a deterioration in the ride comfort of the occupant.
Therefore, various measures for improving the ride comfort of the occupant, such as heat measures for avoiding heat accumulation in the seat pad, have been taken. It is practiced to embed a different insertion member.

However, for example, when an insertion member different from the seat pad constituent member is embedded in the seat pad for the reasons described above, for example, an occupant seated on the seat pad such as the hardness of the seat pad is not uniform. For this reason, a sense of incongruity arises, and there is a possibility that the seating comfort of the occupant seated on the seat pad is deteriorated and, consequently, the riding comfort is deteriorated.
Accordingly, an object of the present invention is to provide a seat pad that can improve the sitting comfort and further the riding comfort of a seated occupant in a seat pad in which an insertion member different from the seat pad constituent member is embedded. It is.

In order to achieve the above object, a seat pad according to the present invention is a seat pad provided with a cushion pad that serves as a seat when seated, from the bottom of the buttocks disposed below the buttocks of a seated occupant. Also, a constant load in the seat pad insertion portion in which the insertion member is embedded on the front side, and at least the seating surface side and the front end side of the insertion member are covered without being exposed, and the insertion member is embedded. The amount of deflection at the time is characterized in that the rear side of the seat pad is larger than the front side of the seat pad. According to the seat pad according to the present invention, it is possible to improve the riding comfort of the seated occupant in the seat pad in which the insertion member different from the seat pad constituent member is embedded.
In the seat pad of the present invention, the hardness of the material constituting the seat pad is higher than the hardness of the material constituting the insertion member, and the hardness of the rear side of the insertion member is that of the insertion member. It is preferable that the hardness is lower than the hardness of the portion other than the rear side. According to this configuration, the rear side of the insertion member can be softened to improve the riding comfort of the seated passenger.
Here, the rear side of the insertion member refers to the insertion member located on the rear side of the seat pad in a state where the insertion member is embedded in the seat pad.

In the seat pad of the present invention, the 25% hardness at 100 mm thickness on the rear side of the insertion member is 20 N or more lower than the 25% hardness at 100 mm thickness on the portion other than the rear side of the insertion member. preferable. According to this configuration, the rear upper surface side of the insertion member can be made softer and the riding comfort of the seated occupant can be further improved.
In the seat pad of the present invention, the hardness of the material constituting the seat pad is higher than the hardness of the material constituting the insertion member, and the rear upper surface side of the insertion member is chamfered. preferable. According to this configuration, the rear upper surface side of the insertion member can be softened by chamfering.
In the seat pad of this invention, it is preferable that the hardness of the rear upper surface side of the insertion member is lower than the hardness of a portion other than the rear upper surface side of the insertion member. According to this configuration, the rear upper surface side of the insertion member can be softened to improve the riding comfort of the seated passenger.

In the seat pad of this invention, it is preferable that at least a part of the rear upper surface side of the insertion member has a portion whose longitudinal section is curved or uneven. According to this configuration, the rear upper surface side of the insertion member can be softened by having a curved or uneven portion on the rear upper surface side of the insertion member.
Here, the rear upper surface side of the insertion member refers to an insertion member positioned on the rear upper surface side of the seat pad in a state where the insertion member is embedded in the seat pad.
In the seat pad of this invention, it is preferable that the insertion member has a plurality of members adjacent to each other in the front-rear direction of the seat pad. According to this configuration, the insertion member can be formed using a plurality of members having different hardnesses.
In the seat pad of this invention, it is preferable that the thickness of the insertion member gradually decreases from the front of the seat pad to the rear of the seat pad. According to this configuration, the rear side of the insertion member can be made softer than the front side.

In the seat pad according to the present invention, the insertion member is exposed only on the back side of the cushion pad, and has a density of 20 to 40 kg / m ³ and a number of cells of 45/25 mm or less. It is preferable that the urethane foam be made. According to this configuration, heat can be efficiently radiated from the insertion member.
In the seat pad of this invention, it is preferable that the said insertion member is provided in the thigh lower part of the said cushion pad. According to this configuration, heat can be radiated more efficiently from the cushion pad by the insertion member provided at the lower thigh of the cushion pad.

  According to the present invention, it is possible to provide a seat pad that can improve the sitting comfort and further the riding comfort of the seated occupant in the seat pad in which the insertion member different from the seat pad constituting member is embedded. .

BRIEF DESCRIPTION OF THE DRAWINGS The structure of the cushion pad in the seat pad which concerns on one embodiment of this invention is shown typically, (a) is the perspective view cut | disconnected along the front-back direction line in the width direction approximate center part of the cushion pad, (b) is It is sectional drawing which follows the front-back direction line of the cushion pad of (a). FIG. 2 is an enlarged view of the highly ventilated member of FIG. 1, (a) is a sectional view of a chamfered example, and (b) is a sectional view conceptually showing a hardness distribution state.

Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 1, in the present embodiment, the seat pad 10 includes a cushion pad 11 that serves as a seat portion on which the user sits down while sitting, and a back pad (not shown) that serves as a backrest portion that rests on the seat. Yes. The seat pad 10 is attached to a seat frame (not shown), and the surface is covered with a skin material (not shown). For example, the seat pad 10 is installed in a vehicle such as an automobile as a seat for a passenger to sit on.

In the present embodiment, the seat pad 10 has the insertion member 12 embedded in the front side of the seat pad of the cushion pad 11 that constitutes the seat pad 10 and below the bottom of the bottom of the seated occupant. At least the seating surface side and the front end side of the insertion member 12 are covered without being exposed (see FIG. 1). That is, in this embodiment, the insertion member 12 is provided in the lower thigh of the cushion pad 11 which becomes a seat part of the seated occupant. In this embodiment, the insertion member 12 is made of a high ventilation member having a higher air permeability than the seat pad member forming the seat pad 10.
The insertion member (highly ventilating member) 12 of this embodiment is formed in a horizontally long rectangular parallelepiped shape that reaches substantially the entire width direction of the flat surface portion 11 a of the cushion pad 11, and corresponds to the insertion member 12. It is embed | buried in the recessed space 13 provided in the cushion pad 11 (refer FIG. 1).

In this embodiment, as an example, the insertion member 12 is disposed on the cushion pad 11 constituting the seat pad 10 so as to be exposed only on the back surface side 11b of the cushion pad 11 (see FIG. 1). However, in addition to this, the cushion pad 11 may be exposed and embedded on the side surface side (width direction side) together with the back surface side 11b of the cushion pad 11, and at least the seating surface side and the front end side of the insertion member 12 are exposed. As long as it is covered.
In the present embodiment, the same member may be used for the cushion pad member that forms the cushion pad 11 and the back pad member that forms the back pad.

Here, the lower buttocks of the cushion pad 11 is a portion that supports a load applied to the cushion pad 11, and the cushion pad 11 according to the present embodiment is, for example, a seat pad installed in an automobile as a seat for a passenger to sit on. 10 is a portion where the occupant's buttocks are located, including at least a portion of the cushion pad 11 where the sciatic tubercle of the seated occupant is located. The occupant seated on the seat pad 10 is mainly supported by the sciatic tuberculosis, which is located on the flat surface portion 11a that occupies the central portion in the width direction of the cushion pad 11 as a seating surface.
In addition, the width direction is a direction along the vehicle width direction of the seat pad 10 installed in the vehicle, the front-rear direction is a direction along the vehicle front-rear direction of the seat pad 10 installed in the vehicle, and the vertical direction is The direction along the vertical direction of the automobile.

As the cushion pad member forming the cushion pad 11 of the present embodiment, a foamed synthetic resin such as polyurethane foam, for example, a polyurethane foam having a density of 45 to 75 kg / m ³ is used. This polyurethane foam is not subjected to film removal treatment. For example, 25% hardness (based on JIS K 6400-2 method) in the form of a seat pad is 200 to 300 N / 200φ, and air permeability (JIS K 6400-7 B). (According to the law) is 100 cc / cm ² / sec or less. The hardness as the material is, for example, 250 to 300 N / 200φ at 25% hardness (based on JIS K 6400-2 method) at a thickness of 100 mm.

The insertion member 12 of the present embodiment has higher air permeability and a density of 20 to 40 kg / m ³ than the seat pad member that forms the seat pad 10 (and thus the cushion pad member that forms the cushion pad 11). The film is formed of a polyurethane foam that has been subjected to film removal, preferably 20 to 30 kg / m ³ , and the number of cells is 45/25 mm or less, more preferably 25/25 mm or less. Thereby, heat can be efficiently radiated from the seat pad 10 by the insertion member (highly-permeable member) 12.

Since the density of the polyurethane foam subjected to film removal treatment is 20 to 40 kg / m ³ , the heat capacity can be lowered while maintaining sitting comfort and riding comfort, and the number of cells is 45 cells / 25 mm or less. Sufficient air permeability can be ensured, and heat can be efficiently radiated from the insertion member (highly air permeable member) 12 and thus the seat pad 10. If the density of the polyurethane foam subjected to film removal treatment is less than 20 kg / m ³ , it will adversely affect sitting comfort and riding comfort. If the density exceeds 40 kg / m ³ , conventional polyurethane foam will be used. Compared to the case where it is used, the heat capacity becomes large and it is difficult to dissipate heat. Further, when the number of cells exceeds 45 cells / 25 mm, it is impossible to ensure a sufficient air permeability for radiating heat.

This film-removed polyurethane foam has, for example, 100 to 200 N / 200φ at 25% hardness at a thickness of 100 mm and an air permeability of 150 to 1000 cc / cm ² / sec. These values are those in a state where the insertion member 12 is not inserted into the cushion pad 11 (that is, a natural state that is not a compressed state).
In the present embodiment, the hardness of the cushion pad member that forms the cushion pad 11 formed of polyurethane foam that has not been subjected to film removal treatment is the hardness of the insertion member 12 that is formed of polyurethane foam that has undergone film removal treatment. The insertion member 12 is softer than the cushion pad member.

  The above-described polyurethane foam used as the insertion member 12 of the present embodiment is a polyurethane foam that has been subjected to film removal for removing the foamed film, that is, has only a skeleton. In the polyurethane foam subjected to the film removal treatment, the air can be easily exchanged in the natural ventilation state as compared with the polyurethane foam not subjected to the film removal treatment. High air permeability can be secured in the environment. The polyurethane foam used as the insertion member 12 of the present embodiment has higher air permeability than the polyurethane foam used as the seat pad member forming the seat pad 10.

Further, the amount of deflection at a constant load in the seat pad insertion portion in which the insertion member 12 of the present embodiment is embedded is larger on the rear side of the seat pad than on the front side of the seat pad. Since the amount of deflection at a constant load is large, for example, when a pressing force is applied, it is easy to compress and deform, and it is easy to bend. Therefore, the seat pad 10 of the portion where the insertion member 12 of this embodiment is embedded is The seat pad rear side, compared to the seat pad front side, is provided with a softness that can be depressed without great resistance according to the load applied when the occupant is seated.
The reason why the seat pad 10 on the back side of the seat pad 10 where the insertion member 12 of the present embodiment is embedded is softer is that the closer the lower part of the seat pad 10 is, the greater the load is applied. This is because the influence of the load is large.

  Here, an example of the seat pad measurement method for obtaining the deflection amount in the insertion member embedded portion in which the insertion member 12 of the present embodiment is embedded, and a difference in the deflection amount obtained from the measurement result are shown. The seat pad measurement for obtaining the amount of deflection in the insertion member 12 embedded portion is performed, for example, by compressing the insertion member 12 embedded portion with 20 N with a cylindrical loader of φ30 mm. And in this embodiment, from the measurement result of the amount of deflection | deviation respectively obtained by the front side and back side of the insertion member 12 embed | buried part, the difference of a deflection | deviation amount is with respect to the back side of the embedment member 12 embed | buried part. The front side is increased by 5 to 10 mm.

  The seat pad 10 in the portion where the insertion member 12 of the present embodiment is embedded (the lower thigh of the cushion pad 11) is more easily compressed and deformed on the rear side of the seat pad than on the front side of the seat pad. 10 can be softened at the portion where the thigh (thigh) of the seated occupant hits, that is, the lower thigh of the cushion pad 11. The portion where the occupant's thigh (thigh) abuts, that is, the lower thigh of the cushion pad 11 is softened and becomes easy to bend, so that the bottom part of the seat pad 10 receives most of the occupant's weight and is greatly bent. Even if the heel lowers, the soft lower thigh also bends in accordance with the bending of the lower buttocks, so that the occupant seated on the seat pad 10 feels uncomfortable between the lower thigh and the lower thigh that bends greatly. It does not occur.

  For this reason, when the insertion member 12 of the present embodiment, which is lower in hardness and softer than the seat pad 10 (cushion pad 11), is disposed on the front side of the bottom part of the seat pad 10, The sitting comfort of the seated passenger can be improved. In addition, if the insertion member 12 of the present embodiment is formed of a high ventilation member, it is possible to ensure high air permeability in the seat pad 10 and to efficiently dissipate heat from the seat pad 10 so that the seated occupant Heat can be made difficult to transmit,

  As shown in FIGS. 1 and 2A, in this embodiment, the hardness of the material constituting the seat pad 10 (for example, polyurethane foam that has not been subjected to film removal treatment) is the material constituting the insertion member 12. (For example, polyurethane foam subjected to film removal treatment) is higher in hardness and the rear upper surface side of the insertion member 12 is chamfered, that is, the rear end surface and the upper end surface of the insertion member 12 intersect. For example, the corners are removed obliquely (chamfered) to eliminate the corners, thereby forming an inclined surface 12a (see FIG. 2A). Thereby, the hardness of the seat pad 10 in the portion where the insertion member 12 of the present embodiment is embedded is lower on the rear side of the seat pad than on the front side of the seat pad, and the rear side of the insertion member 12 Can be softened, and passenger comfort can be improved.

As shown in FIG. 2 (b), in the present embodiment, the hardness of the material constituting the seat pad 10 (for example, polyurethane foam that has not been subjected to film removal) is the material constituting the insertion member 12 (for example, The hardness of the polyurethane foam that has been subjected to film removal treatment is higher than that of the insertion member 12 and the hardness of the rear side of the insertion member 12 is lower than the hardness of the portion other than the rear side of the insertion member 12 (in the figure, the hardness distribution). The state may be displayed conceptually).
As an example, in this embodiment, the 25% hardness at the 100 mm thickness on the rear side of the insertion member 12 is 20 N or more lower than the 25% hardness at 100 mm thickness on the portion other than the rear side of the insertion member 12. Is preferred. Thereby, the hardness of the seat pad 10 in the portion where the insertion member 12 of the present embodiment is embedded is lower on the rear side of the seat pad than on the front side of the seat pad, and the rear side of the insertion member 12 This makes it possible to improve the sitting comfort of the seated passenger.

  In the present embodiment, the hardness of the rear upper surface side of the insertion member 12, that is, the seating surface side located on the seat pad rear end side is lower than the hardness of the portion other than the rear upper surface side of the insertion member 12. Also good. Accordingly, the hardness of the seat pad 10 in the portion where the insertion member 12 of the present embodiment is embedded is a portion other than the seat pad rear upper surface side, that is, the seat pad rear upper surface side than the seat pad rear upper surface side. Therefore, the rear upper surface side of the insertion member 12 can be softened to further improve the sitting comfort of the occupant.

  In the present embodiment, at least a part of the rear upper surface side of the insertion member 12 may have a portion whose longitudinal section is a curved shape or an uneven shape. Thereby, the hardness of the seat pad 10 in the portion where the insertion member 12 of the present embodiment is embedded is lower on the seat pad rear side than on the seat pad front side. The rear upper surface side of the insertion member 12 is easily compressed and deformed when a pressing force is applied such that the vertical cross-section of the seat pad along the longitudinal direction of the seat pad is a curved shape or an uneven shape, that is, an arc shape or a wave shape. If it has the part which becomes a shape which bends easily, the back upper surface side of insertion member 12 can be made soft, and a crew member's sitting comfort can be improved.

  In the present embodiment, the insertion member 12 may have a plurality of members adjacent in the front-rear direction of the seat pad. The insertion member 12 of the present embodiment is formed of, for example, a plurality of members having different hardnesses, and is adjacent to each other so that the hardness changes from high to low from the front of the seat pad to the rear of the seat pad. Thereby, the insertion member 12 can be formed using the some member from which hardness differs, and the hardness of the seat pad 10 of the part by which the insertion member 12 of this embodiment is embed | buried is from a seat pad front side. Further, the seat pad rear side becomes lower, and the rear upper surface side of the insertion member 12 can be softened to improve the sitting comfort of the occupant.

  In the present embodiment, the insertion member 12 may be gradually thinner from the front of the seat pad toward the rear of the seat pad. Thereby, the back side of the insertion member 12 can be made softer than the front side, and the hardness of the seat pad 10 in the portion where the insertion member 12 of the present embodiment is embedded is higher than that of the front side of the seat pad. The rear side becomes lower, the rear upper surface side of the insertion member 12 can be made softer, and the sitting comfort of the occupant can be improved.

Moreover, in this embodiment, the insertion member 12 is a laminated body in which a plurality of layers having different air permeability are laminated, so that the air permeability on the back side of the seat pad (the back side 11a of the cushion pad 11) is The insertion member 12 can be made larger than the air permeability of the portion other than the back side. In this case, the air permeability of the insertion member 12 made of a laminate is desirably increased from the seat pad seating surface side toward the seat pad back surface side, but is not necessarily limited thereto, and the air permeability is not necessarily limited to the seat pad. What is necessary is just to become large as it goes to a seat pad back surface side from a seating surface side.
Further, in the present embodiment, the insertion member 12 is made of the same member, and the compression rate on the back side of the seat pad is smaller than the compression rate of the portion other than the back side of the seat pad. The insertion member 12 having a degree greater than the air permeability of the portion other than the back side of the seat pad can be obtained.

The insertion member 12 can be compressed, that is, the density can be increased, for example, by increasing the compression rate. The insertion member 12 of the present embodiment has a seat pad back surface compared to the seat pad back surface side in advance. It is good also as what formed the compression rate of parts other than the side high, or when installing in the recessed space 13 of the cushion pad 11, compared with the seat pad back surface side, the compression rate of parts other than the seat pad back surface side It may be installed with a higher height.
In the insertion member 12 of the present embodiment, as a specific method of forming or mounting with a higher density as the compression rate of the portion other than the seat pad rear surface side compared to the seat pad rear surface side, for example, the seat pad rear surface There is a method in which a portion other than the side is previously fixed with a fastener or the like so as to be in a compressed state, and the seat pad 10 is attached in that state.

In the present embodiment, the recessed space 13 is formed in the cushion pad 11 as a recessed space that has a horizontally long rectangular parallelepiped shape corresponding to the shape of the insertion member 12 and opens only on the back surface side of the cushion pad 11. (See FIG. 1). In this recessed space 13, the insertion member 12 of this embodiment is inserted into the seat pad 10 (in this embodiment, the cushion pad 11) in a state compressed in the lateral direction of the insertion member 12. Yes. Therefore, the insertion member 12 of this embodiment is embedded in the seat pad 10 in a state where it is exposed only on the back side of the seat pad 10 (see FIG. 1).
Here, the short side direction in plan view of the insertion member 12 refers to a direction orthogonal to the longitudinal direction of the insertion member 12 in plan view, and in FIG.

Moreover, as an example, the compression rate at the time of compressing the insertion member 12 of this embodiment is preferably 20% or less, and more preferably 5 to 10%, of the overall length in the lateral direction of the insertion member 12.
In this embodiment, when the insertion member 12 is inserted into the recessed space 13 of the seat pad 10 (the cushion pad 11 in this embodiment), the insertion member 12 is compressed in the short side direction of the insertion member 12 in plan view. This makes it difficult for the insertion member 12 to be deformed and also makes it difficult to drop out of the recessed space 13 of the seat pad 10.
In the present embodiment, the recessed space 13 is a flat surface portion 11a of the cushion pad 11 serving as a seating surface, the front end side of the portion where the thigh of the seated occupant is located (the lower thigh of the cushion pad 11), that is, It is located in the part located in the front-end side in the range except the passenger | crew's buttocks lower part of the surface part 11a.

  For this reason, the insertion member 12 inserted into the recessed space 13 and embedded in the cushion pad 11 is, in this embodiment, the lower part of the seated occupant's thigh, that is, the flat surface part 11a of the cushion pad 11 serving as the occupant seating part. It is located in the part located in the front-end side in the range except a passenger | crew's bottom. In other words, the lower butt, particularly the portion where the seated sciatic nodule of the seated occupant is located is a portion that supports the weight of the occupant and affects the ride comfort of the occupant. By positioning the insertion member 12 in a range excluding the portion where the nodule is located, it is possible to eliminate the influence on the ride comfort of the occupant as much as possible.

More specifically, the insertion position of the insertion member 12 is only in a region that occupies 40% of the length L in the front-rear direction of the cushion pad 11 from the front end of the cushion pad 11 (see FIG. 1B). It is preferable that it is within the region occupying a length of 35%. This is because it is out of the region that affects the ride comfort of the occupant, and the ride comfort of the occupant seated is not further deteriorated.
The insertion member 12 is not limited to one, and may be formed by a plurality.

  In the seat pad 10 of the present embodiment, the insertion member 12 having the above-described configuration causes the insertion member 12 to generate heat generated in the cushion pad 11 via the insertion member 12 on the seating surface side. Instead, a heat exhaust passage for discharging to the back side of the seat pad is formed. A heat exhaust passage that discharges to the back side of the seat pad through the insertion member 12 is formed, and the heat generated inside the cushion pad 11 can be actively flowed to the back side of the seat pad, thereby increasing the temperature. Since it is possible to prevent the warmed air from going toward the seating surface of the seat pad 10, it is possible to make it difficult for passengers sitting on the seat pad 10 to feel the heat generated inside the cushion pad 11.

  As described above, the insertion member 12 of the seat pad 10 according to the present embodiment transmits the body temperature of the occupant seated on the seat pad 10, or the vehicle is parked when the outside air temperature is high, such as under hot weather, and the temperature inside the vehicle rises. Accordingly, the temperature of the automobile seat is also increased, so that even when the seat pad 10 is heated, heat can be efficiently radiated from the back side of the cushion pad 11. In other words, in the seat pad 10 of the present embodiment, the heat trapped in the seat pad 10 made of polyurethane foam, which is a material that is not easily lowered in temperature and easily trapped in heat, is transferred from the back side of the seat pad of the insertion member 12 to the sheet. It can be efficiently discharged out of the pad 10.

  Further, the insertion member 12 of the present embodiment is a front end side of the portion (lower thigh) where the thigh of the seated occupant is located on the flat surface portion 11a of the cushion pad 11 serving as a seat surface, more specifically, It is located in a region that occupies 40% of the length of the cushion pad 11 from the front end of the pad 11 in the front-rear direction. Compared with the movement. As a result, since the cushion pad 11 is compressed and released frequently and a pumping effect is easily obtained, the effect of exhausting warm air inside the cushion pad 11 including the insertion member 12 to the outside is great. Heat can be efficiently released from the inside of the 11 and the cushion pad 11 can be easily cooled.

  Accordingly, the seat pad 10 according to the present embodiment is easy to cool the cushion pad 11 and avoids the heat from being accumulated in the seat pad 10, so that the occupant who keeps sitting due to the heat accumulated in the seat pad 10 is uncomfortable. As a result, the seating comfort of the occupant is not deteriorated, and consequently the occupant comfort is not deteriorated. In particular, when the interior of an automobile is cooled by an air conditioner, it can be efficiently cooled and the cooling effect can be enhanced, so it is more effective when the automobile is parked under hot weather and the automobile seat is at a high temperature. Is.

  Furthermore, in this embodiment, the insertion member 12 is embedded in the cushion pad 11 on the front end side of the portion (thigh lower part) where the thigh of the flat surface part 11a of the cushion pad 11 is located, and is particularly seated in the lower part of the buttocks. In the portion where the sciatic tuberosity of the occupant is located, there is no space inside the cushion pad 11 which is a foam, and in addition, the portion where the thigh of the flat surface portion 11a is located (the lower thigh) and the lower bottom of the hip In all, polyurethane foam is arranged. Therefore, the seating posture of the seated occupant that occurs when a space is provided in the cushion pad 11 is not stably maintained and it is difficult to secure a comfortable seating comfort. The comfort and, in turn, the ride comfort of the passengers is not impaired.

  As described above, even when another member different from the seat pad constituent member is inserted into the seat pad 10, the sitting comfort of the seated occupant in the seat pad 10 can be improved. When the separate member inserted into the seat pad 10 is the insertion member 12 provided in the lower thigh of the cushion pad 11 serving as the seat, that is, the high ventilation member of the present embodiment, the insertion member 12 is included. Heat can be efficiently released from the inside of the cushion pad 11, and heat can be radiated from the cushion pad 11 more efficiently.

  10: seat pad, 11: cushion pad (seat pad), 11a: flat surface portion, 11b: back side, 12: insertion member, 12a: inclined surface, 13: recessed space.

Claims (10)

A seat pad with a cushion pad that becomes a seat when seated,
An insertion member is embedded in the cushion pad on the front side of the lower bottom of the occupant seated, and at least the seating surface side and the front end side of the insertion member are covered without being exposed. ,
The seat pad, wherein the seat pad insertion portion in which the insertion member is embedded has a deflection amount at a constant load on the rear side of the seat pad larger than that on the front side of the seat pad.   The hardness of the material constituting the seat pad is higher than the hardness of the material constituting the insertion member, and the hardness of the rear side of the insertion member is the hardness of the portion other than the rear side of the insertion member The seat pad according to claim 1, which is lower.   The seat pad according to claim 2, wherein 25% hardness at 100 mm thickness on the rear side of the insertion member is 20 N or lower than 25% hardness at 100 mm thickness on a portion other than the rear side of the insertion member.   The hardness of the material which comprises the said seat pad is higher than the hardness of the material which comprises the said insertion member, and the back upper surface side of the said insertion member is chamfered. The seat pad according to item.   The seat pad according to any one of claims 1 to 3, wherein a hardness on a rear upper surface side of the insertion member is lower than a hardness of a portion other than the rear upper surface side of the insertion member.   The seat pad according to any one of claims 1, 2, 3 and 5, wherein at least a part of the insertion member on a rear upper surface side has a portion having a curved or uneven longitudinal section.   The said insertion member is a seat pad as described in any one of Claim 1 to 6 which made the several member adjoin the seat pad front-back direction.   The seat pad according to any one of claims 1 to 7, wherein the insertion member gradually decreases in thickness from the front of the seat pad toward the rear of the seat pad. The insertion member is a urethane foam that has been exposed to the back side of the cushion pad, has a density of 20 to 40 kg / m ³ , and has a number of cells of 45/25 mm or less, and has been subjected to film removal treatment. The seat pad according to any one of claims 1 to 8.   The seat pad according to any one of claims 1 to 9, wherein the insertion member is provided at a lower thigh of the cushion pad.

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