JPH0549522A - Cushion construction - Google Patents

Abstract

PURPOSE:To improve the comfort of a seat by a method wherein sol in bags is moved by the weight of a passenger and transferred between two or more bags through connecting devices, and particles in the bags are larger in size than the diameter of the connecting devices. CONSTITUTION:When a fitting mat 20 is pressed by the weight of a passenger, separators 26 prevent a mat upper 20A from inflating and sol 30 filled in chambers A, B, C and D moves to an area E. Sol 30 in the second chamber B moves to the edges in the width direction of a seat cushion through through- holes 28 of clearances 36, and sol in the third chamber C supports the rear parts of the buttocks of the passenger. As PE beads 32 can not pass through the through-holes 28 because the diameter of the through-holes 28 is smaller than that of the PE beads 32, the PE beads 32 are retained between the seat surface and bottom of the fitting mat 20 even though the pressure under the buttocks of the passenger is high, so that the seat surface of the fitting mat 20 can be prevented from contacting with the bottom and the comfort in sitting can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion structure such as a seat or a bed.

[0002]

2. Description of the Related Art Conventionally, a vehicle seat mounted on a vehicle such as an automobile does not give a seated occupant a feeling of fatigue and can take a sitting posture according to the occupant's preference. Seat cushions are known,
An example thereof is Japanese Utility Model Laid-Open No. 63-130335.

As shown in FIG. 7, in this seat cushion 70, a seat surface 72 is attached to the central portion of the seat cushion 70 made of a flexible material, and the seat surface 72 is adapted to accommodate the amount of fluid. A central fluid accommodating member 76 is provided which increases or decreases the amount of protrusion of the central portion of the seat surface 72. In addition, on the side portion of the seat cushion 70,
A lateral fluid housing member 78 is provided which increases or decreases the amount of protrusion of the side portion of the seat surface according to the amount of fluid housed. The lateral fluid housing member 78 and the central fluid housing member 76 are They are connected by a fluid passage 80. Further, a flow direction control valve 82 is provided in the fluid passage 80,
The flow direction of the fluid is selectively restricted to one-way on one side in response to the switching command.

Therefore, in the seat cushion 70, the fluid is stored in the central fluid storage member 76 and the lateral fluid storage member 78 by utilizing the weight of the seated occupant.
By moving between the seat and the seat, the central part of the seat surface 72 can be lowered and the side parts of the seat surface can be projected to reduce the clearance between the occupant's body and the seat surface. Since the body of the occupant can be supported more, it is possible to prevent the occupant from being displaced due to rolling.

[0005]

However, in the seat cushion 70, the flow direction control valve 82 and the flow direction control valve 82 are wired between the battery 84 and the flow direction control valve 82 to output a switching command to the flow direction control valve 82. Since the changeover switch 86 is required for this, there is a problem that the device becomes complicated and large, and the weight of the device increases.

In consideration of the above facts, an object of the present invention is to obtain a cushion structure which can obtain a seating surface conforming to the body shape of an occupant with a simple structure.

[0007]

According to a first aspect of the present invention, there is provided a mat member having a plurality of bag bodies which are provided between a cover and a pad and communicated with each other by a connecting means having a small diameter, and the plurality of mat members. With liquid or sol filled in the bag part,
And a granular material having a diameter larger than that of the connecting means mixed in these liquids or sols.

[0008]

According to the first aspect of the present invention, in the seated state, the seat cushion is in a substantially flat state because the liquid or sol filled in the plurality of bag portions of the mat member is dispersed substantially uniformly by gravity. Becomes

On the other hand, when the occupant is seated on the seat cushion, the liquid or sol in the plurality of bag body parts of the mat member is pressed by the weight of the occupant to move in the plurality of bag body parts and at the same time through the connecting means. It moves between the bag body parts and becomes an uneven shape conforming to the body shape of the occupant. Therefore, it is possible to obtain a seat surface that fits the occupant's body shape with a simple structure.

Further, since the granular material in the plurality of bag body portions of the mat member is larger than the diameter of the connecting means, it cannot pass through the connecting means and cannot move to another bag body portion. For this reason, in the bag body part where a large load acts such as the occupant's hips,
It is possible to prevent contact between the seat surface and the bottom surface of the mat member due to the interposition of the granular body between the seat surface and the bottom surface of the mat member, and to improve the sitting comfort.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cushion structure according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, a cover 14 is arranged on the surface of a seat cushion 12 of a vehicle seat 10 to which the cushion structure of this embodiment is applied, and this cover 14 constitutes an outer portion. It has a two-layer structure of the outer skin 16 and the cover pad 18 forming the inner part.

A fitting mat 20 as a mat member is arranged below the cover pad 18, and a pad 22 is arranged below the fitting mat 20. That is, the fitting mat 20 is sandwiched between the cover 14 and the pad 22.

As shown in FIG. 4, the fitting mat 20 comprises a fitting mat upper 20A and a fitting mat under 2 made of a soft resin film.
It is a thin bag with 0B, and as shown in FIG.
Inside the fitting mat 20, three separators 26 made of a soft resin film are arranged at substantially equal intervals in the front-rear direction.

As shown in FIG. 4, the upper end 26A of the separator 26 is adhered to the fitting mat upper 20A, and the lower end 26B of the separator 26 is adhered to the fitting mat under 20B. Therefore,
As shown in FIG. 2, the interior of the fitting mat 20 is divided into four chambers in order from the front into a first chamber A, a second chamber B, a third chamber C, and a fourth chamber D by three separators 26.

As shown in FIG. 1, the second chamber B and the third chamber C of the fitting mat 20 are filled with a sol 30, and the sol 30 has a spherical shape as a granular body and a waterproof PE. The beads 32 are filled. Further, only the sol 30 is filled in the first chamber A and the fourth chamber D.

The total amount of sol 30 injected into the first chamber A, the second chamber B, the third chamber C and the fourth chamber D is 100% or less of the total volume of the fitting mat 20. ,
As shown in FIG. 2, in the vicinity of the seat cushion width direction end of each separator 26, a through hole 28 as a connecting means is formed.
Are drilled respectively. Therefore, the sol 30 can move between the chambers. The diameter of the through hole 28 is P
Since the outer diameter of the E beads 32 is smaller than that of the E beads 32, the PE beads 32 cannot pass through the through holes 28 and move in each chamber.

The separator 26 shown in FIG. 3 has a shape in which a central portion 26C is bulged upward so that the separator 26 does not prevent the fitting mat upper 20A from bulging when a passenger is seated. It has become.

As shown in FIG. 2, the cover 14 is provided at a portion of the fitting mat 20 near the end in the sheet width direction.
A pair of long holes 34 extending in the front-rear direction are provided corresponding to the hanging portions of the first chamber A and the second chamber B from the center of the first chamber A to the center of the second chamber B. A pair of elongated holes 38 extending in the front-rear direction corresponding to the hanging portion of the cover 14 are formed on the rear side of these elongated holes 34, and these elongated holes 38 are formed in the second chamber B. 3rd from the center of
It is set to the center of chamber C. In addition, in the gap 36,
A separator having a through hole 28 is provided.
The E beads 32 cannot pass through.

Further, a long hole 40 is formed in the center portion of the separator 26 in the seat cushion width direction for partitioning the third chamber C and the fourth chamber D along the separator 26 corresponding to the hanging portion of the cover 14. In the vicinity of the long hole 40 of the separator 26 that separates the third chamber C and the fourth chamber D, through holes 28 are formed as connecting means. Furthermore, the long hole 4
Between the vicinity of the end portion of 0 and the end portion of the long hole 38, the through hole 28
PE beads 3 are provided with a separator in which
2 cannot pass through.

As shown in FIG. 4, the side sectional shape of the fourth chamber D at the rear portion of the seat cushion is mountain-shaped.
As shown in FIG. 3, the cloth rubber 44, which is integrally provided on the rear portion of the cover 14, has a substantially flat shape due to the tensile force of the cloth rubber 44. On the other hand, when the occupant is seated, the sol in the third chamber C enters the fourth chamber D through the through hole 28 due to the load of the occupant, and the fourth chamber D resists the tensile force of the cloth rubber 44. As shown by an imaginary line in FIG. 1, the side section is bulged so as to have a mountain shape, and the rear side of the occupant's hip is supported.

Next, the operation of this embodiment will be described.
In the present embodiment having the above-mentioned configuration, the seat cushion 12 is substantially flat as shown in FIG. 1 in the unseat state. This is the sol 3 filled in each of the first chamber A, the second chamber B, the third chamber C, and the fourth chamber D of the fitting mat 20.
This is because 0 is distributed almost uniformly due to gravity.

On the other hand, when the occupant sits on the seat cushion 12, the seat cushion 12 is pressed by the weight of the occupant and the fitting mat 20 is pressed. Thereby, the first chamber A, the second chamber B, the third chamber C, the fourth chamber D
The sol 30 filled in each chamber moves to the seat cushion widthwise end of each chamber and the region E corresponding to the crotch of the occupant (inside of the broken line in FIG. 2) depending on the weight of the occupant. Further, in the second chamber B, the sol 30 moves to the end portion in the seat cushion width direction via the through hole 28 of the gap 36. Also,
As shown in FIG. 3, the separator 26 has two end portions 26.
Since A, 26B and the central portion 26C are bulged to prevent bulging of the fitting mat upper 20A, the fitting mat upper 20A has an uneven shape that conforms to the occupant's body shape. on the other hand,
The sol 30 in the third chamber C enters the fourth chamber D through the through hole 28, bulges the fourth chamber D against the tensile force of the cloth rubber 44, and supports the rear side of the occupant's hip. . Therefore, it is possible to obtain a seat surface that fits the occupant's body shape with a simple structure.

The diameter of the through hole 28 is smaller than the outer diameter of the PE bead 32.
You cannot pass 8. Therefore, in the second chamber B and the third chamber C, even when the pressure of the hips of the occupant is high, there is P between the seat surface and the bottom surface of the fitting mat 20.
It is possible to prevent the seat surface and the bottom surface of the fitting mat 20 from coming into contact with each other through the interposition of the E beads 32, and it is possible to improve the sitting comfort. Further, although the fluid gel in the fitting mat 20 responds promptly to the sway of the occupant in the front, back, left and right directions, the PE beads 32 can prevent the sway of the occupant in the front, rear, left and right directions.

As described above, in the present embodiment, it is possible to obtain a seating surface that suits the occupant's body shape with a simple structure for occupants having different physiques. Further, the entire body pressure is reduced due to the expansion of the body pressure surface, a high pressure is not partially applied to the occupant, and numbness or the like does not occur even when sitting for a long time. Moreover, since the first chamber A, the second chamber B, the third chamber C, and the fourth chamber D of the fitting mat 20 are connected by the small-diameter through holes 28, the sol 30 does not move between the chambers instantaneously. The holdability for the lateral G during cornering is secured.

Although the sol 30 is used in this embodiment, a liquid such as water may be used instead of the sol 30. Further, in the present embodiment, the fitting mat 20 is divided into the first chamber A, the second chamber B, the third chamber C, and the fourth chamber D by the separator 26, but the number of chambers is not limited to four.
Further, the fitting mat 20 may be composed of a plurality of bags, and the plurality of bags may be connected by a connecting means such as a pipe having a small diameter.

In this embodiment, the diameter of the through hole 28 is P
Although the outer diameter of the E bead 32 is made smaller so that the PE bead 32 cannot pass through the through hole 28, a net may be provided in the through hole 28 instead. Further, as shown in FIG. 5, a pipe-shaped filter 50 having a large number of pores and allowing only the sol 30 to pass may be provided in the through hole 28. As shown in FIG. A pipe-shaped filter 52 that allows only the sol 30 to pass may be provided in the through hole 28.

[0028]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, it has an excellent effect that a seating surface conforming to the body shape of an occupant can be obtained with a simple structure.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a vehicle seat to which a cushion structure according to an embodiment of the present invention is applied.

2 is a sectional view taken along line 2-2 of FIG.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a side sectional view showing a fitting mat of a cushion structure according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing another connecting means of the cushion structure according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view showing another connecting means of the cushion structure according to the embodiment of the present invention.

FIG. 7 is a perspective view showing a cushion structure of a conventional example as seen obliquely from the front.

[Explanation of symbols]

 10 Vehicle Seat 12 Seat Cushion 14 Cover 20 Fitting Mat (Mat Material) 22 Pad 26 Separator 30 Sol 28 Through Hole (Connecting Means) 32 PE Beads (Granular Body) A First Chamber (Bag Body) B Second Chamber ( Bag part) C 3rd chamber (bag part) D 4th chamber (bag part)

Claims (1)

[Claims] 1. A mat member having a plurality of bag bodies provided between a cover and a pad and connected to each other by connecting means having a small diameter, a liquid or a sol filled in the plurality of bag bodies, and And a granular body having a diameter larger than that of the connecting means mixed in the liquid or the sol.