U.S. patent application number 11/091380 was filed with the patent office on 2005-12-29 for vehicle seat.
This patent application is currently assigned to TS TECH CO., LTD.. Invention is credited to Ishima, Shinya, Nagayama, Masaki.
Application Number | 20050285438 11/091380 |
Document ID | / |
Family ID | 35124767 |
Filed Date | 2005-12-29 |
United States Patent
Application |
20050285438 |
Kind Code |
A1 |
Ishima, Shinya ; et
al. |
December 29, 2005 |
Vehicle seat
Abstract
A vehicle seat having: a seat cushion and a seat back formed by
covering a surface of a seat pad with a top cover member; a
plurality of air holes which penetrate the seat pad to reach a
surface of the top cover member; a plurality of air outlets which
project from a surface of a duct to be connected to the air holes;
and an air blower to pressure and feed air inside a vehicle
compartment to the air holes through the duct and the air outlets,
wherein a member which has an elastic modulus larger than that of
the seat pad forming the seat cushion is interposed between the
seat cushion and the duct.
Inventors: |
Ishima, Shinya; (Shioya-gun,
JP) ; Nagayama, Masaki; (Shioya-gun, JP) |
Correspondence
Address: |
OLIFF & BERRIDGE, PLC
P.O. BOX 19928
ALEXANDRIA
VA
22320
US
|
Assignee: |
TS TECH CO., LTD.
Asaka-shi
JP
|
Family ID: |
35124767 |
Appl. No.: |
11/091380 |
Filed: |
March 29, 2005 |
Current U.S.
Class: |
297/452.42 |
Current CPC
Class: |
B60N 2/5635
20130101 |
Class at
Publication: |
297/452.42 |
International
Class: |
A47C 007/02 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 31, 2004 |
JP |
2004-102620 |
Claims
What is claimed is:
1. A vehicle seat comprising: a seat cushion and a seat back formed
by covering a surface of a seat pad with a top cover member; a
plurality of air holes which penetrate the seat pad to reach a
surface of the top cover member; a plurality of air outlets which
project from a surface of a duct to be connected to the air holes;
and an air blower to pressure and feed air inside a vehicle
compartment to the air holes through the duct and the air outlets,
wherein a member which has an elastic modulus larger than that of
the seat pad forming the seat cushion is interposed between the
seat cushion and the duct.
2. The vehicle seat as claimed in claim 1, wherein the seat pad
comprises an elastomeric resin formed by a foamed polyurethane or a
flexible urethane foam, the member having an elastic modulus larger
than that of the seat pad is formed by an elastomeric resin which
is formed by a foamed polyurethane or a flexible urethane foam
having an elastic modulus larger than that of the foamed
polyurethane or the flexible urethane foam used for the seat pad.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a vehicle seat having an
air conditioning function.
[0003] 2. Description of the Related Art
[0004] Recently, there is known a vehicle seat having an air
conditioning function in which a plurality of air holes are
provided in a top cover member of a seat cushion and a seat back of
the vehicle seat, and air from an air blower is ejected from the
air holes (refer to JP-Tokukaihei-10-297274).
[0005] The vehicle seat disclosed in JP-Tokukaihei-10-297274 is
schematically configured such that the plurality of air holes are
provided to penetrate a top cover member, a cover pad and a pad
forming the seat cushion and the seat back, an air blower, an
intermediate duct and a seat cushion air exhaust duct are arranged
on a lower surface of the seat cushion, and a seat back air exhaust
duct is arranged on a back surface of the seat back.
[0006] A plurality of air outlets which slightly project from the
surface to engage with the inside of the air holes are formed on
the seat cushion air exhaust duct and the seat back air exhaust
duct. The air from the air blower is fed to the seat cushion air
exhaust duct and the seat back air exhaust duct through the
intermediate duct, and is then ejected from the air holes connected
to the air outlets to the seat surface.
[0007] However, in a vehicle seat having a normal air conditioning
function including one disclosed in JP-Tokukaihei-10-297274, the
duct is arranged at the lower surface of the seat cushion, so that
when a passenger sits in or pushes a pedal, the passenger may feel
uncomfortable due to the duct, thereby losing a comfortable feeling
to sit in, or damaging the duct due to the impact by the weight of
the passenger's body.
SUMMARY OF THE INVENTION
[0008] The present invention has been achieved in view of the above
problem, and an object of the present invention is to provide a
vehicle seat which is capable of suppressing deterioration of
comfortable feeling when sitting in the seat due to a duct arranged
on a lower surface of a seat cushion.
[0009] To solve the above problem, in accordance with the first
aspect of the present invention, the vehicle seat of the present
invention comprises:
[0010] a seat cushion and a seat back formed by covering a surface
of a seat pad with a top cover member;
[0011] a plurality of air holes which penetrate the seat pad to
reach a surface of the top cover member;
[0012] a plurality of air outlets which project from a surface of a
duct to be connected to the air holes; and
[0013] an air blower to pressure and feed air inside a vehicle
compartment to the air holes through the duct and the air
outlets,
[0014] wherein a member which has an elastic modulus larger than
that of the seat pad forming the seat cushion is interposed between
the seat cushion and the duct.
[0015] According to the vehicle seat, a member which has elastic
modulus larger than that of the seat pad forming the seat cushion
is interposed between the seat cushion and the duct, so that in the
case where the front portion of the seat cushion is deformed due to
the downward compressing force from a thigh of a passenger when the
passenger sits in or pushes a pedal, the member us elastically
deformed to encompass the circumference of the duct. Thus, the
passenger does not feel uncomfortable due to the interposed duct,
thereby enabling to prevent to lose a comfortable feeling when
sitting in the seat, and absorbing the impact to the duct by the
weight of the passenger. Further, deformation of the front portion
of the seat cushion in the vertical direction (vertical stroke) can
be secured due to the elastic deformation of the member.
[0016] Consequently, a vehicle seat which is capable of suppressing
deterioration of comfortable feeling when sitting in the seat due
to the duct arranged on the lower surface of the seat cushion can
be obtained.
[0017] Preferably, in the vehicle seat of the present invention,
the seat pad comprises an elastomeric resin formed by a foamed
polyurethane or a flexible urethane foam, the member having an
elastic modulus larger than that of the seat pad is formed by an
elastomeric resin which is formed by a foamed polyurethane or a
flexible urethane foam having an elastic modulus larger than that
of the foamed polyurethane or the flexible urethane foam used for
the seat pad.
[0018] According to the vehicle seat, the seat pad comprises
elastomeric resin formed by foamed polyurethane or flexible
urethane foam, and the member having elastic modulus larger than
that of the seat pad is formed by elastomeric resin which is formed
by foamed polyurethane or flexible urethane foam having elastic
modulus larger than that of the foamed polyurethane or the flexible
urethane foam used for the seat pad, so that the structure capable
of obtaining the effect specifically described above can be
applied.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will become more fully understood from
the detailed description given hereinafter and the accompanying
drawings which are given by way of illustration only, and thus are
not intended as a definition of the limits of the present
invention, and wherein;
[0020] FIG. 1 is a perspective view showing an outline of a vehicle
seat;
[0021] FIG. 2 is a longitudinal sectional view of a main portion
showing a structure of a seat back;
[0022] FIG. 3 is a perspective view showing a framework structure
of the seat cushion side of the vehicle seat;
[0023] FIG. 4 is a perspective view showing the framework structure
of the seat cushion side of the vehicle seat;
[0024] FIG. 5 is a longitudinal sectional view of a main portion
showing an arrangement of a high modulus member; and
[0025] FIG. 6 is a perspective view showing a framework structure
of the seat back side of the vehicle seat.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] The preferred embodiments for embodying the present
invention will be explained in detail below referring to the
drawings.
[0027] As shown in FIG. 1, a vehicle seat 10 is schematically
configured to comprise a seat cushion 20, a seat back 30, a head
rest 40 provided on the upper portion of the seat back 30 and the
like. Among them, as shown in FIG. 2, the seat back 30 is
configured such that a surface of a pad 31 which keeps a seat shape
and functions as a cushion member is covered with a cover pad 32
with permeability, and the surface of the cover pad 32 is further
covered with a top cover member 33. FIG. 2 shows the seat back 30,
however, similarly, the seat cushion 20 is also configured such
that the surface of the pad 31 is covered with the cover pad 32 and
the top cover member 33. Hereinafter, the combination of the pad 31
and the cover pad 32 is described as a "seat pad 34".
[0028] There are a plurality of air holes 33a formed in the surface
of the top cover member 33. As shown in FIG. 2, each air hole 33a
is connected to an air outlet 61C on the surface of the duct
60C.
[0029] FIG. 3 is a perspective view showing a framework structure
of the seat cushion 20 side of the vehicle seat 10, and FIG. 4 is a
perspective view of the framework structure as seen from the lower
surface side.
[0030] The framework structure of the seat cushion 20 side is
schematically configured to comprise a pair of right and left seat
rails 21, a pair of right and left seat frames 22 attached to the
seat rails 21, seat springs 23, a pan frame 24 which is crossed
over the seat springs 23 and the front portions of the seat frames
22, and the like.
[0031] As shown in FIG. 4, air blowers 50A and 50B for the seat
cushion 20 are attached to the front and center of the lower
surface of the pan frame 24, respectively.
[0032] As shown in FIG. 5, a member 70 (hereinafter, refer to "high
modulus member 70") having elastic modulus higher than that of the
seat pad 34 (the pad 31 and the cover pad 32) forming the seat
cushion 20 is interposed between a duct 60A and the seat cushion
20.
[0033] As the pad 31 and the cover pad 32, for example, one which
is formed by integrally molding elastomeric resin such as closed
cell type or open cell type foamed polyurethane or flexible
urethane foam to conform to the seat shape is used, or an assembly
of elastomeric resins which are molded into particles is used. The
high modulus member 70 used in the present invention is also formed
with elastomeric resin such as closed cell type or open cell type
foamed polyurethane or flexible urethane foam, however, the elastic
modulus thereof is higher than that of the elastomeric resin used
in the pad 31 and the cover pad 32.
[0034] As shown in FIG. 4, a duct 60B connected to the air blow
hole of the central (back) air blower 50B extends backward on the
lower surface side of the pan frame 24, and branches off in right
and left direction.
[0035] A plurality of tubular air outlets 61A, 61B are provided to
project upward at the positions on the upper surfaces of the ducts
60A, 60B corresponding to the plurality of air holes 33a.
[0036] FIG. 6 is a back view of the seat back 30, and the seat back
30 is schematically configured to comprise a sub seat frame 31
having an opening 31a in the center, a seat spring (omitted from
the drawings) attached to the sub seat frame 31 and the like.
[0037] An air blower 50C for the seat back is attached to one of
the right and left lower sides of the back surface of the sub seat
frame 31.
[0038] A duct 60C connected to the air blow hole of the air blower
50C extends upward from the right and left positions in the opening
31a of the sub seat frame 31.
[0039] At the positions corresponding to the plurality of air holes
33a on the front surface of the duct 60C, similar to the above seat
cushion 20 side, a plurality of tubular air outlets 61C are
provided to project upward.
[0040] The air outlets 61A, 61B, 61C of the seat cushion 20 side
and the seat back 30 side engage the insides of the air holes 33a
of the seat cushion 20 side and the seat back 30 side,
respectively.
[0041] As above, according to the vehicle seat 10 of the present
invention, the high modulus member 70 is interposed between the
seat cushion 20 and the duct 60A, so that in the case where the
front portion of the seat cushion 20 is deformed due to the
downward compressing force from a thigh of a passenger when the
passenger sits in or pushes a pedal, the passenger does not feel
uncomfortable due to the interposed duct 60A, thereby enabling to
prevent to lose a comfortable feeling when sitting in the seat, and
absorbing the impact to the duct 60A by the weight of the
passenger's body. Further, enough deformation of the front portion
of the seat cushion 20 in the vertical direction (stroke in the
vertical direction) can be secured due to the elastic deformation
of the high modulus member 70.
[0042] Moreover, in the present invention, the seat pad 34 is
formed with elastomeric resin formed by foamed polyurethane or
flexible urethane foam, and a member having elastic modulus higher
than that of the seat pad 34 is formed with elastomeric resin
formed by foamed polyurethane or flexible urethane foam having
elastic modulus higher than that of the foamed polyurethane or
flexible urethane foam used in the seat pad 34. Thus, the structure
capable of obtaining the effect specifically described above can be
applied.
[0043] The present invention is not limited to the above
embodiment, and various improvements and design changes may be made
without departing from the scope of the invention.
[0044] As above, the vehicle seat according to the present
invention is useful as a seat mounted on the vehicle such as an
automobile or the like, especially, the vehicle seat is suitable as
a seat to give comfortable feeling to a passenger when the
passenger sit in.
[0045] The entire disclosure of Japanese Patent Application Nos.
Tokugan 2004-102527 which was filed on Mar. 31, 2004, Tokugan
2004-102594 which was filed on Mar. 31, 2004, Tokugan 2004-102601
which was filed on Mar. 31, 2004, Tokugan 2004-102620 which was
filed on Mar. 31, 2004, and Tokugan 2004-102639 which was filed on
Mar. 31, 2004, including specification, claims, drawings and
summary are incorporated herein by reference in its entirety.
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