U.S. patent application number 09/888119 was filed with the patent office on 2002-12-26 for chair backrest with ventilating function.
Invention is credited to Su, Tung-Hua.
Application Number | 20020195863 09/888119 |
Document ID | / |
Family ID | 25392559 |
Filed Date | 2002-12-26 |
United States Patent
Application |
20020195863 |
Kind Code |
A1 |
Su, Tung-Hua |
December 26, 2002 |
Chair backrest with ventilating function
Abstract
A chair backrest comprises an inner frame, a net, and an outer
frame. The inner frame is a hollow member and has an outer
peripheral edge. The net is made of soft material and embraces the
outer edge of the inner frame. The outer frame is a hollow member
made of rigid material and includes a peripheral groove defined in
a side thereof and extending along a periphery defining the outer
frame. A bottom wall defining the peripheral groove includes a
plurality of fastening holes. The outer peripheral edge of the
inner frame and an outer peripheral edge of the net are received in
the peripheral groove of the outer frame. Fasteners are
respectively extended through the fastening holes and into the
inner frame.
Inventors: |
Su, Tung-Hua; (Kuwi Jen
Hsiang, TW) |
Correspondence
Address: |
Charles E. Baxley, Esquire
59 John St, 5FL
New York
NY
10037
US
|
Family ID: |
25392559 |
Appl. No.: |
09/888119 |
Filed: |
June 25, 2001 |
Current U.S.
Class: |
297/440.11 |
Current CPC
Class: |
A47C 31/023 20130101;
A47C 7/282 20130101; A47C 7/40 20130101 |
Class at
Publication: |
297/440.11 |
International
Class: |
A47C 007/40 |
Claims
What is claimed is:
1. A chair backrest comprising an inner frame, a net, and an outer
frame, the inner frame being a hollow member and having an outer
peripheral edge, the net being made of soft material and embracing
the outer edge of the inner frame, the outer frame being a hollow
member made of rigid material and including a peripheral groove
defined in a side thereof and extending along a periphery defining
the outer frame, a bottom wall defining the peripheral groove
including a plurality of fastening holes, the outer peripheral edge
of the inner frame and an outer peripheral edge of the net being
received in the peripheral groove of the outer frame, and a
plurality of fasteners being respectively extended through the
fastening holes and into the inner frame.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a chair backrest with
ventilating function and, more particularly, to a chair backrest
that provides improved safety and an aesthetically pleasing
appearance.
[0003] 2. Description of the Related Art
[0004] Chairs are a necessity in daily life and there are a wide
variety of chairs that provides improved sitting comfort and
air-ventilating function. FIGS. 4 and 5 of the drawings illustrate
a conventional chair backrest for providing a ventilating function.
The backrest includes a rigid hollow rectangular frame 1' and a net
2'. The net 2' is made of soft material and wraps the outer
peripheral edge of the frame 1' tightly to hereby embrace the frame
1' and to thereby support a user when the user lies on the backrest
with the net 2' providing a ventilating function.
[0005] The conventional backrest includes several drawbacks. First
of all, the frame 1' might be deformed or even broken and thus
injure the user when the lying force from the user is relatively
large, as the user is only supported by the frame 1' that is
located in the net 2'. Second, the shape of the backrest is
confined to the shape of the frame 1', which is relatively
monotonous. Further, the frame 1' is still visible via the openings
or holes in the net 2', which adversely affects the aesthetically
pleasing appearance.
SUMMARY OF THE INVENTION
[0006] An object of the present invention is to provide a chair
backrest for providing improved safety and an aesthetically
pleasing appearance.
[0007] A chair backrest in accordance with the present invention
comprises an inner frame, a net, and an outer frame. The inner
frame is a hollow member and has an outer peripheral edge. The net
is made of soft material and embraces the outer edge of the inner
frame. The outer frame is a hollow member made of rigid material
and includes a peripheral groove defined in a side thereof and
extending along a periphery defining the outer frame. A bottom wall
defining the peripheral groove includes a plurality of fastening
holes. The outer peripheral edge of the inner frame and an outer
peripheral edge of the net are received in the peripheral groove of
the outer frame. Fasteners are respectively extended through the
fastening holes and into the inner frame.
[0008] Other objects, advantages, and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is an exploded perspective view of a chair backrest
in accordance with the present invention.
[0010] FIG. 2 is a perspective view of the chair backrest in
accordance with the present invention.
[0011] FIG. 3 is a sectional view of the chair backrest in
accordance with the present invention.
[0012] FIG. 4 is an exploded perspective view of a conventional
chair backrest.
[0013] FIG. 5 is a perspective view of the conventional chair
backrest.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0014] Referring to FIGS. 1 through 3, a chair backrest in
accordance with the present invention generally includes an inner
frame 1, a net 2, and an outer frame 3. The inner frame 1 is a
hollow member that has a shape corresponding to that of a backrest.
The net 2 is made of soft material and includes an opening 21 in a
lower end thereof and a zipper 22 provided to the lower end of the
net 2 for closing the opening 21. Thus, the inner frame 1 can be
inserted into the net 2 when the opening 21 is still open, and the
zipper 22 is used to close the opening 21 to make the net 2 embrace
an outer peripheral edge of the inner frame 1 tightly.
[0015] The outer frame 3 is a hollow member that is made of rigid
material and that includes a hollow interior 33 for ventilation
purpose. The outer frame 3 further includes a peripheral groove 31
defined in a side thereof and extended along a periphery of the
outer frame 3. A bottom wall defining the peripheral groove 31
includes a plurality of fastening holes 32 for engaging with
fasteners 34. Thus, as illustrated in FIG. 3, the outer peripheral
edge of the inner frame 1 and an outer peripheral edge of the net 2
are inserted into the peripheral groove 31 and fasteners 34 are
extended through the fastening holes 32 in the peripheral groove 31
and into the inner frame 1, thereby securing the inner frame 1 in
the peripheral groove 31. Thus, the outer frame 3 provides the
whole backrest with an increased strength and improved safety for
reliably supporting the user. In addition, the inner frame 1 is
hidden in the outer frame 3, thereby providing an aesthetically
pleasing effect.
[0016] According to the above description, it is appreciated that
the chair backrest in accordance with the present invention
provides improved safety and aesthetically pleasing effect in
addition to the original ventilating function.
[0017] Although the invention has been explained in relation to its
preferred embodiment, it is to be understood that many other
possible modifications and variations can be made without departing
from the scope of the invention as hereinafter claimed.
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