U.S. patent application number 16/656819 was filed with the patent office on 2021-04-22 for type of simple folding chair.
The applicant listed for this patent is Zenithen USA LLC d/b/a Z Company, Zenithen USA LLC d/b/a Z Company. Invention is credited to Andrew David Frankel, Shi-Ping Zheng, Tian-Xia Zheng.
Application Number | 20210112986 16/656819 |
Document ID | / |
Family ID | 1000004440200 |
Filed Date | 2021-04-22 |
![](/patent/app/20210112986/US20210112986A1-20210422-D00000.png)
![](/patent/app/20210112986/US20210112986A1-20210422-D00001.png)
![](/patent/app/20210112986/US20210112986A1-20210422-D00002.png)
![](/patent/app/20210112986/US20210112986A1-20210422-D00003.png)
![](/patent/app/20210112986/US20210112986A1-20210422-D00004.png)
United States Patent
Application |
20210112986 |
Kind Code |
A1 |
Frankel; Andrew David ; et
al. |
April 22, 2021 |
TYPE OF SIMPLE FOLDING CHAIR
Abstract
A folding chair that includes a frame and seat and back fabric
supported by the frame. The frame includes primary leg frames and
secondary leg frames that cross-hinge on both sides, and the lower
sections hinge to a pair of backrest bars of the secondary leg
frames. There is a support ring or armrest bars at the hinges
between the primary leg bars and the backrest bars to form traction
to the backrest bars and to provide armrest function.
Inventors: |
Frankel; Andrew David;
(Yorba Linda, CA) ; Zheng; Shi-Ping; (Fuzhou,
CN) ; Zheng; Tian-Xia; (Fuzhou, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Zenithen USA LLC d/b/a Z Company |
Upland |
CA |
US |
|
|
Family ID: |
1000004440200 |
Appl. No.: |
16/656819 |
Filed: |
October 18, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47C 7/22 20130101; A47C
4/28 20130101 |
International
Class: |
A47C 4/28 20060101
A47C004/28; A47C 7/22 20060101 A47C007/22 |
Claims
1. A folding chair that includes a frame and seat fabric supported
by the frame; the frame includes primary leg bars, secondary leg
bars, and backrest bars; the primary leg bars, the secondary leg
bars, and the backrest bars form a u-shaped structure, and the leg
bars on both sides of the primary leg bars and secondary leg bars
cross-hinge to form the support; the lower sections of a pair of
said backrest bars hinge to the top sections of the secondary leg
bars; it is also equipped with a support ring, where the front part
of the support ring hinges to the top sections of the primary legs
and the back part hinges to the top sections of the backrest bars,
and both ends form the armrests; the hinges of the backrest bars
and the second leg bars can be lifted and closed toward the front
parts of hinges between the primary leg bars and the armrest bars
to form a folded structure; the seat fabric is divided into seat
area and backrest area; and the front edge of the seat area and the
upper edge of the backrest area hang on to the front and back edges
of the support ring.
2. The chair in claim 1, wherein the u-shaped bottom bars of the
primary leg bars and secondary leg bars rest of the ground, and the
hinges between the upper sections of the secondary leg bars have a
horizontal bar; and the connection between the seat area and the
backrest area of the seat fabric is anchored on the horizontal bar,
and the horizontal bar forms the support and shape of the seat.
3. The chair in claim 2, wherein the seat fabric is formed by the
arrangement of multiple woven straps, and forms one of the
following structures: a) seat area and backrest area have a
continuous strap, and the two ends are anchored to the front part
and back part of the support ring, respectively; b) seat area and
backrest area have a continuous strap, and the woven strap wraps
around the horizontal bar and is sewn into a cover, and the two
ends are anchored to the front part and back part of the support
ring, respectively; c) seat area and backrest area have independent
seat woven straps and backrest woven straps, the two ends of the
seat woven straps are anchored to the front part the support ring
and the horizontal bar, and all the seat woven straps near the
horizontal bar are cross woven to a side-oriented woven strap; one
end of each of the backrest woven straps is woven to the
side-oriented woven strap, while the other end is anchored to the
back part of the support ring, and the seat woven straps and the
backrest woven straps are alternatively distributed on the
side-oriented woven straps; and d) seat area and backrest area have
independent seat woven straps and backrest woven straps, the two
ends of the seat woven straps are anchored to the front part the
support ring and the horizontal bar, the two ends of the backrest
woven straps are anchored to horizontal bar and the back part of
the support ring, and the seat woven straps and the backrest woven
straps are alternatively distributed on the horizontal bar.
4. The chair in claim 3, wherein: the support ring is a closed
circle or oval structure; the two hinge points between the front
part of the support ring and the primary legs form an area where
the seat cloth fabric is located as a transition; one end of the
woven strap or seat back woven strap is directly sewn to the edge
of the seat cloth fabric; the hinge point between the back part of
the support ring and the pair of backrest bars forms an area where
the backrest cloth fabric is located as a transition; one end of
the woven strap or seat back woven strap is directly sewn to the
edge of the backrest cloth fabric.
5. The chair in claim 2, wherein there are also chain stoppers at
the two sides of the hinge points of the primary leg bars and
secondary leg bars; and the chain stoppers have one of the
following structural options: double hinge plates, traction chains,
or woven straps.
6. A folding chair includes a frame and seat fabric supported by
the frame; the frame includes primary leg bars, secondary leg bars,
and backrest bars; the primary leg bars, the secondary leg bars,
and the backrest bars both form a u-shaped structure, and the leg
bars on both sides of the primary leg bars and secondary leg bars
cross-hinge to form the support; the lower sections of a pair of
said backrest bars hinge to the top sections of the secondary leg
bars; its special feature is: it is also equipped with a pair of
armrest bars, where the front parts of the armrest bars hinge to
the top sections of the primary legs and the back part hinges to
the top sections of the backrest bars; the hinges of the backrest
bars and the secondary leg bars can be lifted and closed toward the
front parts of hinges between the primary leg bars and the armrest
bars to form a folded structure; the seat fabric is divided into
seat area and backrest area; and the seat area is anchored between
the upper sections of the primary leg bars and the secondary leg
bars, and upper edge of the backrest area hangs on to the upper
section of the pair of backrest bars.
7. The chair in claim 6, wherein the primary leg bars and the
secondary leg bars is a closed rectangular structure that includes
a U-shaped structure.
8. The chair in claim 6, wherein: the seat fabric is made of woven
straps; the seat area and the backrest area are independent seat
woven straps and backrest woven straps, respectively; and the two
ends of the seat woven straps are anchored to the u-shaped bottom
bars of the primary leg bars and secondary leg bars, the two ends
of the backrest woven straps are anchored to the u-shaped bottom
bars of the secondary leg bars and the backrest bars, and the seat
woven straps and the backrest woven straps are alternatively
distributed on the u-shaped bottom bar of the secondary leg bars.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
[0001] This invention is to the folding chair category.
Specifically, it refers to a type of simple folding chair, and the
backrest area of this folding chair has an optional embodiment
having of woven straps.
Technical Background
[0002] There are many types of folding chairs currently available
in the market and they provide diverse options. One such chair is
shown in published pre grant application number 201120038961.3,
which shows a type of simple folding backrest chair that includes
leg frames, seat area, and backrest. The leg frame are two
rectangular steel tube frames with both sides cross-hinged at the
center, forming a foldable structure that opens into an X-shaped
support. The seat area is a square canvas placed horizontally above
the two leg frames and are firmly fastened to the top of the two
leg frames. The inner part of the upper backrest has a bow-shaped
steel tube frame for the rectangular canvas. The bow of the
backrest curves upwardly at an inclination and the lower part is
firmly fastened to the upper part of both sides of the leg frames,
such that support must be provided for the backward leaning
position to maintain the inclination of the backrest and to be able
to withstand the backward leaning force. The patent is to a
traditional folding stool with a backrest.
[0003] Patent application number 201621117245.3 discloses a stable,
portable folding chair, which simply replaces the square canvas in
the aforementioned patent with straps in order to achieve a
breathable effect.
[0004] Small structure and simplicity are the biggest advantages of
this type of folding chair. It can satisfy the needs for temporary
seating, but the lack of armrests significantly impacts its level
of comfort. How to improve the shortcomings of available folding
chairs is an object of the present invention.
SUMMARY OF THE INVENTION
[0005] A purpose of this invention is to design a simple folding
chair with armrests located at the connections between the front of
the seat area and the backrest.
[0006] A technical solution of this invention is implemented with
the following method: a simple folding chair that includes a frame
and a seat fabric supported by the frame. The frame includes
primary leg bars, secondary leg bars, and backrest bars. The
primary leg bars and the secondary leg bars both form a U-shaped
structure, and the leg bars on both sides cross-hinge to form the
support. The lower sections of a pair of backrest bars hinge to the
top sections of the second leg bars. A special feature is that it
is also equipped with a support ring, where the front part of the
support ring hinges to the top sections of the primary legs and the
back part hinges to the top sections of the pair of backrest bars
to form armrests on both sides. The hinges of the backrest bars and
the secondary leg bars can be lifted and closed toward the front
part of the support ring to form a folded structure. The seat
fabric is divided into seat area and backrest area. The front edge
of the seat area and the upper edge of the backrest area hangs on
to the front and back edges of the support ring, respectively.
[0007] The U-shaped bottom bars of the primary leg bars and
secondary leg bars rest on the ground, and the hinges between the
upper sections of the secondary leg bars have a horizontal bar. The
connection between the seat area and the backrest area of the seat
fabric is anchored to the horizontal bar, and the horizontal bar
forms the support and shape of the seat.
[0008] The seat fabric is formed by an arrangement of multiple
woven straps, and form one of the following structures: 1) Seat
area and backrest area having a continuous strap, and the two ends
are anchored to the front part and back part of the support ring,
respectively; 2) Seat area and backrest area having a continuous
strap, and the woven strap wraps around the horizontal bar and is
sewn into a cover, and the two ends are anchored to the front part
and back part of the support ring, respectively; 3) Seat area and
backrest area having independent seat woven straps and backrest
woven straps, the two ends of the seat woven straps are anchored to
the front part the support ring and the horizontal bar, and all the
seat woven straps near the horizontal bar are cross woven to a
side-oriented woven strap. One end of each of the backrest woven
straps is woven to the side-oriented woven strap, while the other
end is anchored to the back part of the support ring, and the seat
woven straps and the backrest woven straps are alternatively
distributed on the side-oriented woven straps; and 4) Seat area and
backrest area have independent seat woven straps and backrest woven
straps, the two ends of the seat woven straps are anchored to the
front part the support ring and the horizontal bar, the two ends of
the backrest woven straps are anchored to horizontal bar and the
back part of the support ring, and the seat woven straps and the
backrest woven straps are alternatively distributed on the
horizontal bar.
[0009] The support ring is a closed circle or an oval structure.
The two hinge points between the front part of the support ring and
the primary legs form an area where the seat cloth fabric is
located as a transition. One end of the woven strap or seat back
woven strap is directly sewn to the edge of the seat cloth fabric.
The hinge point between the back part of the support ring and the
pair of backrest bars forms an area where the backrest cloth fabric
is located as a transition. One end of the woven strap or seat back
woven strap is directly sewn to the edge of the backrest cloth
fabric.
[0010] There are also chain stoppers at the two sides of the hinge
points of the primary leg bars and secondary leg bars. The chain
stoppers have one of the following structural options: double hinge
plates, traction chains, or woven straps.
[0011] A simple folding chair that includes a frame and seat fabric
supported by the frame. The frame includes primary leg bars,
secondary leg bars, and backrest bars. The primary leg bars, the
secondary leg bars, and the backrest bars form a U-shaped
structure, and the leg bars on both sides of the primary leg bars
and secondary leg bars cross-hinge to form the support. The lower
sections of the pair of said backrest bars hinge to the top
sections of the secondary leg bars. Its special feature is that it
is also equipped with a pair of armrest bars, where the front parts
of the armrest bars hinge to the top sections of the primary legs
and the back part hinges to the top sections of the backrest bars.
The hinges of the backrest bars and the secondary leg bars can be
lifted and closed toward the front parts of hinges between the
primary leg bars and the armrest bars to form a folded structure.
The seat fabric is divided into seat area and backrest area. The
seat area is anchored between the upper sections of the primary leg
bars and the secondary leg bars, and upper edge of the backrest
area hangs on to the upper section of the pair of backrest
bars.
[0012] The primary leg bars and the secondary leg bars are part of
a closed rectangular structure that includes a U-shaped
structure.
[0013] The seat fabric is made of woven straps. The seat area and
the backrest area are independent seat woven straps and backrest
woven straps, respectively. The two ends of the seat woven straps
are anchored to the U-shaped bottom bars of the primary leg bars
and secondary leg bars, the two ends of the backrest woven straps
are anchored to the U-shaped bottom bars of the secondary leg bars
and the backrest bars, and the seat woven straps and the backrest
woven straps are alternatively distributed on the U-shaped bottom
bar of the secondary leg bars.
[0014] This invention adds a support ring or armrest bars between
the front edge of the seat area and the backrest area to form a
traction backrest bar and to have a larger design for the backrest
inclination angle for longer sitting time. The design also provides
an armrest function for resting the arms to improve the level of
comfort. In addition, woven straps with good breathability are used
as the seat fabric. In addition to a simple parallel design, the
woven straps can also add a crisscross form to have more varieties
of woven patterns to provide personalized options.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is an illustration of the simple folding chair.
[0016] FIG. 2 is a magnified illustration of selection A from FIG.
1.
[0017] FIG. 2B is partial illustration of woven strap configuration
II.
[0018] FIG. 3 is a schematic side-view of the simple folding
chair.
[0019] FIG. 4 is an illustration of the simple folding chair
support frame.
[0020] FIG. 5 is an illustrated of the folded simple folding
chair.
[0021] FIG. 6 is a partial illustration of woven strap
configuration Ill.
[0022] FIG. 7 is a partial illustration of woven strap
configuration IV.
[0023] FIG. 8 is an illustration of simple folding chair II.
[0024] FIG. 9 is a magnified illustration of selection B from FIG.
8.
[0025] Similar reference characters denote corresponding features
consistently throughout the attached drawings. Namely, in the
drawings the following reference numbers refer to the following
part: [0026] 1--frame [0027] 11--primary leg bar [0028]
111--U-shaped bottom bar [0029] 12--secondary leg bar [0030]
13--backrest bar [0031] 14--support ring [0032] 15--horizontal bar
[0033] 16--armrest bar [0034] 2--seat fabric [0035] 21--seat area
[0036] 211--sea area woven strap [0037] 212--seat cloth fabric
[0038] 22--backrest area [0039] 221--backrest woven strap [0040]
222--backrest cloth fabric [0041] 23--side-oriented woven strap
[0042] 24--anchoring woven strap [0043] 3--chain stopper
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Example 1
[0044] Referring to FIGS. 1 to 5, a simple folding chair includes
support frame 1 and seat fabric 2 supported by the support
frame.
[0045] Frame 1 includes primary leg frames 11, secondary frames 12,
backrest bars 13, and support ring 14. Both primary leg frames 11
and secondary leg frames 12 form a U-shaped structure and thus have
leg bars on both sides and U-shaped bottom bar 111. The ideal
process is by bending a bar. The leg bars on both sides of the
primary leg bars 11 and secondary leg bars 12 cross-hinge to form
the support, so the main body forms an X-shaped cross which can be
opened or folded up. The lower sections of a pair of backrest bars
13 hinge to the top sections of the second leg bars 12. The front
part of the support ring 14 hinges to the top sections of the
primary legs 11 and the back part hinges to the top sections of the
backrest bars 13 thus connecting to the pair of backrest bars 13
and form armrests on both sides to provide seating comfort. The
folding direction is shown in FIG. 3, where it is lifted forward
from the hinges between secondary leg bars 12 and backrest bars 13,
such that the primary leg frames 11 and support ring 14 close to
form a folded structure. The folded and flat shape of frame 1 is
shown in FIG. 5.
[0046] As shown in FIGS. 4 and 5, to further strengthen the
structure, the U-shaped bottom bars 11 of the primary leg bars 11
and secondary leg bars 12 rest on the ground, and the hinges
between the upper sections of the secondary leg bars have a
horizontal bar 15, thus forming a rectangular structure. It can
also be understood that the secondary leg bars 12 an be bent into
the rectangular frame. Both upper and lower sections have a
U-shaped bottom bar 111, and the upper part of the U-shaped bottom
bar 111 is identical to the horizontal bar 15. The function of the
horizontal bar 15 is the strengthen the hinges between the
secondary leg bars 12 and the backrest bars 13, such that they will
not collapse due to weight, and it also serves as an anchor for
seat fabric 2.
[0047] Seat fabric 2 is divided into two functional areas, namely,
seat area 21 and backrest area 22. The front edge of the seat area
21 and the upper edge of the backrest area 22 hang on to the front
and back edges of the support ring, respectively, and the armrests
on both sides are hollow and are not enclosed by fabric to form a
simple sitting style. Furthermore, the connection between seat area
21 and backrest area 22 of the seat fabric is anchored to backrest
bar 15, and the horizontal bar forms the support and shape of the
seat and back, such that a good seat shape can be obtained from the
soft fabric.
[0048] In this example, the seat fabric 2 is formed by the
arrangement of multiple woven straps with the following specific
structures:
[0049] 1) Seat area 21 and backrest area 22 have a continuous
strap, and the two ends are anchored to the front part and back
part of the support ring 14, respectively. In this structure, the
woven straps are in a hanging form, and the shape of the seat
fabric 2 is relatively hard to maintain in a stable shape.
Therefore, the bottom part of each section of the seat area that
corresponds to each woven strap is further stabilized by an
anchoring woven strap 24. The top section of the anchoring woven
strap 24 is fastened to the horizontal bar 15, thus providing a
shape-forming function to the seat area 21 and improving the weight
bearing capacity of the seat area, as shown in FIG. 6.
[0050] 2) Seat area 21 and backrest area 22 have a continuous
strap, and the woven strap wraps around the horizontal bar 15 and
is stitched into a cover, and the two ends are anchored to the
front part and back part of the support ring 14, respectively. The
woven strap process in this structure is the simplest, but the
connection between the seat area 21 and the backrest area 22 has a
significant corner, as shown in FIG. 9.
[0051] 3) Seat area 21 and backrest area 22 have independent seat
woven straps 211 and backrest woven straps 221, the two ends of the
seat woven straps 211 are anchored to the front part the support
ring 14 and the horizontal bar 15, and all the seat woven straps 21
near the horizontal bar 15 are cross woven to a side-oriented woven
strap 23. One end of each of the backrest 221 woven straps is woven
to the side-oriented woven strap 23, while the other end is
anchored to the back part of the support ring 14, i.e., the
side-oriented woven strap 23 is the anchoring point of the lower
section of the backrest woven strap. In this structure, the
backrest woven straps 221 may have a certain curve to match the
buttocks of the user and to provide a curved form. In addition, the
seat woven straps 211 and backrest woven straps 221 crisscross with
each other to present an aesthetic appearance. Thus, it is the
preferred solution, as shown in FIGS. 1 and 2.
[0052] The woven straps in this solution can utilize an aligned
orientation, as shown in FIG. 2B. Specifically, backrest woven
straps 221 and seat woven straps 211 are aligned, and the lower
section is directly anchored to the seat woven straps 221, which
can also maintain the curved shaped of backrest woven straps 221.
In structure, the side-oriented woven strap 23 can be maintained to
connect all the seat woven straps 211, or it can be omitted.
[0053] 4) Seat area 21 and backrest area 22 have independent seat
woven straps 211 and backrest woven straps 221, the two ends of the
seat woven straps 211 are anchored to the front part the support
ring 14 and the horizontal bar 15, the two ends of the backrest
woven straps 221 are anchored to horizontal bar 15 and the back
part of the support ring 14, and the seat woven straps 211 and the
backrest woven straps 221 are alternatively distributed on the
horizontal bar, as shown in FIG. 7.
[0054] The aforementioned woven straps are in a vertical and
parallel format and are in the same direction as a pair of backrest
bars 13. The seat woven straps 211 and the backrest woven straps
221 can either be aligned or staggered to provide the best
appearance. However, solutions such as a checkered pattern can also
be implemented, e.g., anchor multiple side-oriented woven straps 23
on seat woven straps 211 and backrest woven straps 221 to form
checkers. Or, mesh fabric can be used directly to form a simple
folding chair with a different appearance.
[0055] Furthermore, this application preferably uses a support ring
14, which has a closed circle or oval structure. The two hinge
points between the front part of the support ring 14 and the
primary legs 11 form an area where the seat cloth fabric 212 is
located as a transition. One end of the woven strap or seat back
woven strap 211 is directly sewn to the edge of the seat cloth
fabric 212. The hinge point between the back part of the support
ring 14 and the pair of backrest bars 13 forms an area where the
backrest cloth fabric 222 is located as a transition. One end of
the woven strap or seat back woven strap 221 is directly sewn to
the edge of the backrest cloth fabric 222. The circle ring or oval
ring is preferred for its moderate shape. In addition, it forms
additional spaces at the front edge of the seat and the top of the
backrest, so that the legs and the back will not directly touch the
bars after eating. Both sides curve outward to match the natural
form of resting arms, making it more comfortable. As shown in FIG.
1, the seat cloth fabric 212 and backrest cloth fabric 222 have
horizontal weight bearing capacity and a certain level of
flexibility, and are not hard on the legs and back, and thus are
more preferred. In addition, the multiple woven straps are equal in
length, making it easier to process as well as aesthetically more
pleasing.
[0056] In addition, there are also chain stoppers 3 at the two
sides of the hinge points of the primary leg bars 11 and secondary
leg bars 12. The chain stoppers 3 has one of the following
structures: double hinge plates, traction chains, or woven straps.
They serve as stoppers and have a weight bearing function; they
alleviate the range of extension of the lower part of the hinge
between primary leg bars 11 and secondary leg bars 12.
Example 2
[0057] In FIGS. 8 and 9, the design is similar to the
aforementioned example, but the support ring 14 is directly
replaced two armrest bars 16 to form a more compact structure.
Specifically, a type of simple folding chair is shown that includes
a frame 1 and seat fabric 2 supported by the frame. The frame 1
includes primary leg bars 11, secondary leg bars 12, backrest bars
13, and armrest bars 16. The primary leg bars 11, the secondary leg
bars 12, and the backrest bars 13 form a U-shaped structure, so the
structure has leg bars on both sides and U-shaped bottom bars 111.
The leg bars on both sides of the primary leg bars 11 and secondary
leg bars 12 cross-hinge to form the support. The lower sections of
a pair of backrest bars 13 hinge to the top sections of the
secondary leg bars 12. The front parts of the armrest bars 16 hinge
to the top sections of the primary leg bars 11 and the back part
hinges to the top sections of the backrest bars 13. The hinges of
the backrest bars 14 and the secondary leg bars 12 can be lifted
and closed toward the front parts of hinges between the primary leg
bars 11 and the armrest bars 16 to form a folded structure.
[0058] In this structure, the preferred solution for the primary
leg bars 11 and the secondary leg bars 12 is a closed rectangular
structure, i.e., a rectangular framed is formed by connecting the
ends of bent bars. The rectangular frame can be understood as both
upper and lower sections having a U-shaped bottom bar 111, and the
upper part of the U-shaped bottom bar 111 is identical to the
horizontal bar 15. The advantage of choosing a rectangular frame is
that it 1) Provides convenient anchoring to seat fabric 2; and 2)
Support frame 1 rests more stably on the ground. The process of the
seat fabric 2 is the same as that in Example 1, i.e., the structure
in Example 1 is applicable to this example.
[0059] The seat fabric 2 is divided into seat area 21 and backrest
area 22. The seat area 21 is anchored between the upper sections of
the primary leg bars 11 and the secondary leg bars 12, i.e.,
between the upper parts of the two U-shaped bottom bars 111. The
upper edge of the backrest area 22 hangs on to the upper section of
the pair of backrest bars 14; more specifically, on the U-shaped
bottom bars 111 of the backrest bars 14.
[0060] Additionally, the seat fabric 2 is made of woven straps. The
seat area 21 and the backrest area 22 are independent seat woven
straps 211 and backrest woven straps 221, respectively. The two
ends of the seat woven straps 211 are anchored to the U-shaped
bottom bars 111 of the primary leg bars 11 and secondary leg bars
12, the two ends of the backrest woven straps 221 are anchored to
the U-shaped bottom bars 111 of the secondary leg bars 12 and the
backrest bars 13, and the seat woven straps 211 and the backrest
woven straps 221 are alternatively distributed on the U-shaped
bottom bar 111 of the secondary leg bars 12, as shown in FIG.
7.
[0061] In this example, the secondary leg frame 12 is a bent
U-shaped structure and is formed into a closed rectangular frame by
a separate horizontal bar. Therefore, the aforementioned U-shaped
bar and the horizontal bar 15 are the same part, or in other words,
the upper and lower sections of the primary leg bars 11 and the
secondary leg bars 12 that form the rectangular frame structure
have both the U-shaped bottom bar 111 or the horizontal bar 15.
[0062] To summarize, woven straps are the preferred seat fabric 2,
but regular fabrics such as nylon straps, mesh cloth and oxford
cloth are not excluded. In terms of the sewing and fastening of the
seat woven straps and the backrest woven straps, solutions such as
heat fusion, metal hoop or rivet locking can be used. These are all
regular anchoring solutions and are applicable to this
structure.
* * * * *