U.S. patent application number 16/258711 was filed with the patent office on 2019-08-01 for folding canopy.
This patent application is currently assigned to Linhai Zhenyi Arts and Crafts Co., Ltd.. The applicant listed for this patent is Nengxiao Lu, Feilong Zhan. Invention is credited to Nengxiao Lu, Feilong Zhan.
Application Number | 20190234102 16/258711 |
Document ID | / |
Family ID | 67391955 |
Filed Date | 2019-08-01 |
United States Patent
Application |
20190234102 |
Kind Code |
A1 |
Lu; Nengxiao ; et
al. |
August 1, 2019 |
Folding Canopy
Abstract
A folding canopy comprises pillars, the two adjacent pillars are
connected by an intermediate folding unit, an upper portion of the
pillar is hingedly connected with a spoke with flexural elasticity,
upper ends of the spokes are converged toward and hingedly
connected with a hub to form a top supporting frame, a runner
capable of ascending upward and descending downward is disposed
below the hub, ribs of a same number as the spokes are disposed
between the runner and the spokes, a first end of the rib is
hingedly connected with the spoke, a second end of the rib is
converged toward and hingedly connected with the runner, a locking
structure capable of locking the runner on the hub is disposed
between the runner and the hub, and the second end is higher than
the first end of the rib when the runner is locked by the snap-on
locking structure.
Inventors: |
Lu; Nengxiao; (Linhai City,
CN) ; Zhan; Feilong; (Linhai City, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Lu; Nengxiao
Zhan; Feilong |
Linhai City
Linhai City |
|
CN
CN |
|
|
Assignee: |
Linhai Zhenyi Arts and Crafts Co.,
Ltd.
Linhai City
CN
|
Family ID: |
67391955 |
Appl. No.: |
16/258711 |
Filed: |
January 28, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E04H 15/46 20130101;
E04H 15/18 20130101; E04H 15/50 20130101; E04H 15/64 20130101; E04H
15/58 20130101; E04H 1/1272 20130101 |
International
Class: |
E04H 15/50 20060101
E04H015/50; E04H 15/46 20060101 E04H015/46 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 30, 2018 |
CN |
CN201820159014.1 |
Jan 18, 2019 |
CN |
CN201920088533.8 |
Claims
1. A folding canopy comprising: at least three pillars; an
intermediate folding unit, two adjacent pillars being connected by
the intermediate folding unit to form a lateral supporting frame; a
spoke, connected with an upper portion of each of the pillars being
hingedly connected and an upper end of each of the spokes being
converged toward a hub and hingedly connected with the hub to form
a top supporting frame; a runner, disposed below the hub and
capable of ascending upward and descending downward; ribs disposed
between the runner and the spokes, the ribs being in equal number
to the spokes, a first end of each of the ribs being hingedly
connected with one of the spokes, a second end of each of the ribs
being converged toward the runner and being hingedly connected with
the runner; a locking structure disposed between the runner and the
hub and capable of locking the runner on the hub; wherein the spoke
has flexural elasticity and the spoke comprises a first rod, a
second rod, and a joint with a U-groove, an opening of the U-groove
faces upward, and a second end of the first rod and a first end of
the second rod are disposed in the U-groove of the joint and are
hingedly connected with the joint; and wherein the second end of
the rib is higher than the first end of the rib when the runner is
locked by the locking structure.
2. The folding canopy as claimed in claim 1, wherein the locking
structure comprises an insertion hole disposed on a lower end
surface of the hub and along an axial direction of the hub, a
mounting hole is formed on an inner wall of the insertion hole and
along a radial direction of the insertion hole, inside the mounting
hole is disposed with a lock pin and a spring capable of causing
the lock pin to always have a tendency to move toward the insertion
hole, the runner has a pole capable of being plugged into and being
connected with the insertion hole, a limit slot is formed on an
outer surface of an upper end of the pole, and an upper end portion
of the pole has a spherical frontal shape.
3. The folding canopy as claimed in claim 1, wherein an upper end
of the pillar is fixed with a first mount, and a second end of the
second rod is hingedly connected on the corresponding first
mount.
4. The folding canopy as claimed in claim 3, wherein each of the
pillars is slidably connected with a second mount, the second mount
is located below the first mount, a strut is disposed between the
second mount and the second rod, a first end of the strut is
hingedly connected on the second mount, and a second end of the
strut is hingedly connected at a middle portion of the
corresponding second rod.
5. The folding canopy as claimed in claim 4, wherein the pillars
have four rectangularly configured folding units that are
intermediately disposed between the two adjacent pillars
respectively and each of the folding units is a parallelogram
connecting rod structure, two corners of a first end of the
parallelogram connecting rod structure are hingedly connected on
the first mount and the second mount of one of the pillars, and two
corners of a second end of the parallelogram connecting rod
structure are hingedly connected on the first mount and the second
mount of the adjacent pillar.
6. The folding canopy as claimed in claim 5, wherein the
parallelogram connecting rod structure comprises a first connecting
bar, a second connecting bar, a third connecting bar, and a fourth
connecting bar, a first end of the first connecting bar is hingedly
connected on the first mount of one of the pillars, and a first end
of the second connecting bar is hingedly connected on the second
mount of the same pillar that the first connecting bar is hingedly
connected with; wherein a first end of the third connecting bar is
hingedly connected on the first mount of another adjacent pillar,
and a first end of the fourth connecting bar is hingedly connected
on the second mount of the same pillar that the third connecting
bar is hingedly connected with; and wherein a second end of the
first connecting bar is hingedly connected with a second end of the
third connecting bar, and a second end of the second connecting bar
is hingedly connected with a second end of the fourth connecting
bar.
7. The folding canopy as claimed in claim 2, wherein an upper end
of the pillar is fixed with a first mount, and a second end of the
second rod is hingedly connected on the corresponding first
mount.
8. The folding canopy as claimed in claim 7, wherein each of the
pillars is slidably connected with a second mount, the second mount
is located below the first mount, a strut is disposed between the
second mount and the second rod, a first end of the strut is
hingedly connected on the second mount, and a second end of the
strut is hingedly connected at a middle portion of the
corresponding second rod.
9. The folding canopy as claimed in claim 1, wherein a second end
of the rib is hingedly connected on the runner by the eccentric
plates arranged in parallel, the second end of the rib is
positioned between two eccentric plates.
10. The folding canopy as claimed in claim 1, wherein a pole is
fixed with the hub and a lower end portion of the pole has a limit
slot, an insertion hole is disposed in the runner and along an
axial direction of the runner, a mounting hole is formed on an
inner wall of the insertion hole and along a radial direction of
the insertion hole, the mounting hole is disposed with a lock pin
and a spring capable of causing the lock pin to always have a
tendency to move toward the insertion.
11. The folding canopy as claimed in claim 10, wherein a fixing
tube is fixed with the hub, a sliding tube is axially slidably
coupled to the fixing tube, and a spring is disposed between the
sliding tube and the hub, the pole is arranged in the fixing tube
and sliding tube and the sliding tube is capable of covering the
lower end portion of the pole under a force from the spring.
Description
RELATED APPLICATIONS
[0001] This application claims priority to China Patent Application
No. CN201820159014.1 filed Jan. 30, 2018 and CN201920088533.8 filed
Jan. 18, 2019.
[0002] The applications and all patents, patent applications,
articles, books, specifications, other publications, documents, and
things referenced herein are hereby incorporated herein in their
entirety for all purposes. To the extent of any inconsistency or
conflict in the definition or use of a term between any of the
incorporated publications, documents, or things and the text of the
present document, the definition or use of the term in the present
document shall prevail.
BACKGROUND OF THE INVENTION
Field of Invention
[0003] The present invention belongs to the technical field of
machinery and relates to a folding canopy, and more particularly to
a mobile folding canopy.
Related Art
[0004] Mobile folding canopy is used for temporary activities such
as outdoor exhibition, product promotion and advertisement,
celebration evening party, exhibition and trade fair, tourism and
leisure, field work as well as singing and dance evening party. It
can also be used as a long-term leisure facility in resort park
area, tourist attraction, vacation resort and scenic spot. The
folding canopy is unfolded during use, which is lightweight,
durable and portable.
[0005] The main structure of mobile folding canopy is composed of
lateral supporting frames formed by a plurality of pillars, and a
top frame disposed on top of the lateral supporting frames. The top
frame can be covered with a sunshade canvas or the top and the side
portions can be covered with a sunshade canvas as needed. Compared
with parasol, mobile folding canopy has a larger practical space,
and there is a greater market demand for it.
[0006] At present, folding canopies are very inconvenient in
unfolding and collapsing because of their large size, and often
require one or two people to operate at the same time. For example,
a mobile canopy has been disclosed, in which lateral supporting
frames are formed by a plurality of pillars, folding units are
connected between the pillars, a top frame is formed by spokes, the
top frame is supported by struts connected to the pillars, and a
locking structure is disposed on each of the pillars so that the
struts can support the top frame.
SUMMARY OF THE INVENTION
[0007] One object of one embodiment of the present invention is to
provide a folding canopy to solve the above technical problem in
the prior art. The technical problem to be solved by the present
invention is how to achieve easy, convenient and labor-saving
unfolding and collapsing of the folding canopy.
[0008] One object of one embodiment of the present invention can be
achieved by the following technical solutions: a folding canopy
comprising at least three pillars, two adjacent pillars being
connected by an intermediate folding unit to form a lateral
supporting frame, an upper portion of each of the pillars being
hingedly connected with a spoke, the spoke having flexural
elasticity and the spoke comprising a first rod, a second rod, and
a joint with a U-groove, an opening of the U-groove facing upward,
and a second end of the first rod and a first end of the second rod
being disposed in the U-groove of the joint and being hingedly
connected with the joint; an upper end of each of the spokes being
converged toward a hub and hingedly connected with the hub to form
a top supporting frame, a runner capable of ascending upward and
descending downward being disposed below the hub, ribs of a same
number as the spokes being disposed between the runner and the
spokes, a first end of each of the ribs being hingedly connected
with one of the spokes, a second end of each of the ribs being
converged toward the runner and being hingedly connected with the
runner, a locking structure capable of locking the runner on the
hub being disposed between the runner and the hub, wherein the
second end of the rib is higher than the first end of the rib when
the runner is locked by the snap-on locking structure.
[0009] In one embodiment of the folding canopy of the present
invention, the pillars, the spokes and the ribs are in a folded
state when the folding canopy is collapsed, and the hub and the
runner are separated vertically when the spokes are folded. When
the folding canopy needs to be unfolded, the runner is pushed
upwardly by hands manually, as the runner continues to move upward,
the runner drives the two rods of each of the spokes to unfold, and
simultaneously, through the ribs, pushes the adjacent spokes to
mutually separate and deploy, and the pillars connected with the
spokes are also unfolded along with the spokes when the spokes are
unfolded. Therefore, by pushing a single runner, the spokes and the
pillars can be simultaneously unfolded, thereby realizing
convenient operation by a single person. Since the unfolding of the
spokes and the pillars is achieved by one person, it is very
convenient and labor-saving.
[0010] During the ascent of the runner, the ribs are pushed to be
disposed horizontally, that is, the first end and the second end of
each of the ribs are in a horizontal state, in that state the
spokes are in a critical state and cannot be further unfolded
outwardly. The spokes have a certain flexible deformation due to
their long length, which can produce slight flexural elasticity,
and the spoke is formed by hingedly connecting the two rods, which
also provide a certain slight deformation displacement. Therefore,
when pushing the runner to continue to move upward, after the first
ends of the ribs continue to push the spokes to flexurally deform
the spokes, the second ends of the ribs cross over the horizontal
state so that the second ends are higher than the first ends of the
ribs. And the runner is locked on the hub by the locking structure,
and then the spokes are restored to the original shape to realize
the unfolding and fixing of the folding canopy. Similarly, when the
folding canopy needs to be folded, pull the runner downward to
unlock the runner from the hub, and the runner is moved downwardly
until the ribs are in a horizontal state, the spokes are slightly
flexurally deformed, and only a small acting force applied to the
runner can cause the second ends of the ribs to be lower than the
first ends, thereby the collapse of the folding canopy is realized.
The collapsing and unfolding manner of the folding canopy makes the
necessary acting force applied on the runner smaller, and the
collapsing and unfolding of the folding canopy is easy and
convenient, as well as time-saving and labor-saving.
[0011] In one embodiment of the above-mentioned folding canopy, the
locking structure comprises an insertion hole disposed on a lower
end surface of the hub and along an axial direction of the hub, a
mounting hole is formed on an inner wall of the insertion hole and
along a radial direction of the insertion hole, inside the mounting
hole is disposed with a lock pin and a spring capable of causing
the lock pin to always have a tendency to move toward the insertion
hole, the runner has a pole capable of being plugged into and being
connected with the insertion hole, a limit slot is formed on an
outer surface of an upper end of the pole, and an upper end portion
of the pole has a spherical frontal shape. When the folding canopy
is unfolded, the runner is moved upwardly so that the pole is
inserted into the insertion hole, and the upper end portion of the
pole first pushes aside the lock pin so that the lock pin moves
toward the inside of the mounting hole until the limit slot moves
to a position opposite to the lock pin. The lock pin moves toward
the insertion hole under the action of the spring and is caught in
the limit slot, so that the runner is locked on the hub. At this
point, under the flexural action of the spokes, the ribs cause the
runner to have a tendency to move upward, thereby achieving the
locking effect of the runner on the hub. When the folding canopy
needs to be collapsed, pull the runner downward to cause the lock
pin to withdraw from the limit slot, so that the runner and the hub
are unlocked. The locking structure can further include having the
mounting hole opened on the outer surface of the pole, the lock pin
and the spring disposed in the mounting hole, and the limit slot
disposed on the inner wall of the insertion hole.
[0012] Alternately, the upper end portion of the pole is fixed with
the hub and the lower end portion of the pole has a limit slot, the
insertion hole is disposed in the runner and along an axial
direction of the runner, the mounting hole is formed on an inner
wall of the insertion hole and along a radial direction of the
insertion hole, the mounting hole is disposed with a lock pin and a
spring capable of causing the lock pin to always have a tendency to
move toward the insertion hole. When the folding canopy is
unfolded, the runner is moved upwardly so that the lower end
portion of the pole is inserted into the insertion hole, and the
lower end portion of the pole first pushes aside the lock pin so
that the lock pin moves toward the inside of the mounting hole
until the limit slot moves to a position opposite to the lock
pin.
[0013] In one embodiment of the above-mentioned folding canopy, an
upper end of the pillar is fixed with a first mount, and a second
end of the second rod is hingedly connected on the corresponding
first mount. The above structure facilitates the unfolding of the
rods, and the pillars form a better supporting effect for the
folding canopy.
[0014] In one embodiment of the above-mentioned folding canopy,
each of the pillars is slidably connected with a second mount, the
second mount is located below the first mount, a strut is disposed
between the second mount and the second rod, a first end of the
strut is hingedly connected on the second mount, and a second end
of the strut is hingedly connected at a middle portion of the
corresponding second rod. When the above structure is in a state in
which the folding canopy is fully extended, the struts form a
better support for the second rods, which enhances an overall
structural strength of the folding canopy, and enhances the
stability of the folding canopy when it is unfolded.
[0015] In one embodiment of the above-mentioned folding canopy, the
pillars have four rectangularly configured folding units that are
intermediately disposed between the two adjacent pillars
respectively and each of the folding units is a parallelogram
connecting rod structure, the two corners of a first end of the
parallelogram connecting rod structure are hingedly connected on
the first mount and the second mount of one of the pillars, and the
two corners of a second end of the parallelogram connecting rod
structure are hingedly connected on the first mount and the second
mount of the adjacent pillar. When the folding canopy needs to be
unfolded or collapsed, the parallelogram connecting rod structure
drives the two adjacent pillars to be outwardly extended or
inwardly collapsed, which provides a guiding effect for the
unfolding or collapsing of the pillars to ensure that the folding
canopy is unfolded or collapsed smoothly, and the above structure
also enhances the stability of the overall structure of the folding
canopy.
[0016] In one embodiment of the above-mentioned folding canopy, the
parallelogram connecting rod structure comprises a first connecting
bar, a second connecting bar, a third connecting bar, and a fourth
connecting bar, a first end of the first connecting bar is hingedly
connected on the first mount of one of the pillars, and a first end
of the second connecting bar is hingedly connected on the second
mount of the same pillar that the first connecting bar is hingedly
connected with; a first end of the third connecting bar is hingedly
connected on the first mount of another adjacent pillar, and a
first end of the fourth connecting bar is hingedly connected on the
second mount of the same pillar that the third connecting bar is
hingedly connected with; a second end of the first connecting bar
is hingedly connected with a second end of the third connecting
bar, and a second end of the second connecting bar is hingedly
connected with a second end of the fourth connecting bar. Through
the parallelogram connecting rod structures, a distance between the
two adjacent pillars is larger when the folding canopy is unfolded,
which increases a volume of the folding canopy when it is
unfolded.
[0017] Compared with the prior art, one embodiment of the folding
canopy of the present invention has the following advantages: the
collapsing and unfolding manner of the folding canopy makes the
necessary acting force applied on the runner smaller, and the
collapsing and unfolding of the folding canopy is easy and
convenient, as well as time-saving and labor-saving.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a perspective structural view of first embodiment
of the present invention;
[0019] FIG. 2 is an enlarged structural view of A of FIG. 1;
[0020] FIG. 3 is an enlarged structural view of B of FIG. 1;
[0021] FIG. 4 is a perspective structural view of a runner of one
embodiment of the present invention;
[0022] FIG. 5 is a perspective structural view of a hub of one
embodiment of the present invention;
[0023] FIG. 6 is a section structural view of FIG. 2; and
[0024] FIG. 7 is a part section structural view of second
embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0025] The technical solutions of the present invention are further
described below with reference to the specific embodiments of the
present invention in conjunction with the accompanied drawings, but
the present invention is not limited to the embodiments.
First Embodiment
[0026] As shown in FIG. 1, FIG. 2, and FIG. 3, this embodiment of a
folding canopy comprises a plurality of spokes 1, a hub 2, and a
runner 3 located below the hub 2 and capable of being locked on the
hub 2. The spoke 1 comprises a first rod 11, a second rod 12, and a
joint 13 with a U-groove 131, an opening of the U-groove 131 faces
upward, a first end of the first rod 11 is hingedly connected on
the hub 2, and a second end of the first rod 11 and a first end of
the second rod 12 are extended into the U-groove 131 of the joint
13 and hingedly connected with the joint 13. A plurality of ribs 4
in one-to-one correspondence with the first rods 11 are disposed on
the runner 3, a second end of the rib 4 is hingedly connected on
the runner 3 by the eccentric plates 33 arranged in parallel, the
second end of the rib 4 is positioned between two eccentric plates
33 for reinforcing the structure and preventing the runner 3 from
rotating and a first end of the rib 4 is hingedly connected at a
middle portion of the corresponding first rod 11, and the spoke 1
has flexural elasticity. When the first rod 11 and the second rod
12 are rotated to the same linear position, the rib 4 is inclined
and the second end of the rib 4 hingedly connected with the runner
3 faces downward.
[0027] Furthermore, as shown in FIG. 1, this embodiment of the
folding canopy further comprises a plurality of pillars 7
corresponding to the second rods 12 respectively, an upper end of
the pillar 7 is fixed with a first mount 8, and a second end of the
second rod 12 is hingedly connected on the corresponding first
mount 8. Each of the pillars 7 is fixed with a second mount 9, the
second mount 9 is located below the first mount 8, a strut 10 is
disposed between the second mount 9 and the second rod 12, a first
end of the strut 10 is hingedly connected on the second mount 9,
and a second end of the strut 10 is hingedly connected at a middle
portion of the corresponding second rod 12. In this embodiment, the
pillars 7 have four rectangularly configured parallelogram
connecting rod structures 71 that are disposed between the two
adjacent pillars 7 respectively. The parallelogram connecting rod
structure 71 comprises a first connecting bar 711, a second
connecting bar 712, a third connecting bar 713, and a fourth
connecting bar 714, a first end of the first connecting bar 711 is
hingedly connected on the first mount 8 of one of the pillars 7,
and a first end of the second connecting bar 712 is hingedly
connected on the second mount 9 of the same pillar 7 that the first
connecting bar 711 is hingedly connected with; a first end of the
third connecting bar 713 is hingedly connected on the first mount 8
of another adjacent pillar 7, and a first end of the fourth
connecting bar 714 is hingedly connected on the second mount 9 of
the same pillar 7 that the third connecting bar 713 is hingedly
connected with; a second end of the first connecting bar 711 is
hingedly connected with a second end of the third connecting bar
713, and a second end of the second connecting bar 712 is hingedly
connected with a second end of the fourth connecting bar 714.
[0028] As shown in FIG. 4, FIG. 5 and FIG. 6, this embodiment of an
insertion hole 21 is disposed on a lower end surface of the hub 2
and along an axial direction of the hub 2, a mounting hole 22 is
formed on an inner wall of the insertion hole 21 and along a radial
direction of the insertion hole 21, inside the mounting hole 22 is
disposed with a lock pin 5 and a spring 6 capable of causing the
lock pin 5 to always have a tendency to move toward the insertion
hole 21, the runner 3 has a pole 31 capable of being plugged into
and being connected with the insertion hole 21, a limit slot 32 is
formed on an outer surface of an upper end of the pole 31, and an
upper end portion of the pole 31 has a spherical frontal shape.
[0029] When the folding canopy needs to be unfolded, one embodiment
of the runner 3 is moved upward, during the upward movement of the
runner 3, the first rod 11 and the second rod 12 are driven to
rotate, and the hub 2 is driven to move upward and the pillars 7
are driven to move outward and parallel to each other, through the
guide of the parallelogram connecting rod structures 71. When the
first rod 11 and the second rod 12 are rotated to the same linear
position, the hub 2 is moved to a highest point, and the spokes 1
are in a maximum unfolded state. At this point, the ribs 4 are
inclined and the second end of the rib 4 is lower than the first
end, the runner 3 is moved upwardly continuously to cause the ribs
4 in a horizontal state, the spokes 1 are slightly flexurally
deformed in this state, and only a small acting force applied to
the runner 3 can cause the second ends of the ribs 4 to be higher
than the first ends. During the process of restoring the spokes 1
to the original shape, the runner 3 can be driven to move upward by
flexural action through the ribs 4 so that the pole 31 is inserted
into the insertion hole 21, until after the lock pin 5 is located
in the limit slot 32, the runner 3 is locked on the hub 2 to
realize the unfolding of the folding canopy. Under the flexural
action of the spokes 1, the ribs 4 cause the runner 3 to have a
tendency to move upward, thereby enhancing the locking effect of
the runner 3 on the hub 2.
Second Embodiment
[0030] This embodiment is similar to the first embodiment except
the snap-on locking structure, as shown in FIG. 7. An upper end
portion 311 of the pole 31 is fixed with the hub 2 and the lower
end portion 312 of the pole 31 has a limit slot 32, the insertion
hole 21 is disposed in the runner 3 and along an axial direction of
the runner 3, the mounting hole 22 is formed on an inner wall of
the insertion hole 21 and along a radial direction of the insertion
hole 21, the mounting hole 22 is disposed with a lock pin 5 and a
spring 6 capable of causing the lock pin 5 to always have a
tendency to move toward the insertion hole 21 and the lower end
portion 312 of the pole 31 has a spherical frontal shape. When the
folding canopy is unfolded, the runner 3 is moved upwardly so that
the lower end portion 312 of the pole 31 is inserted into the
insertion hole 21, and the lower end portion 312 of the pole 31
first pushes aside the lock pin 5 so that the lock pin 5 moves
toward the inside of the mounting hole 22 until the limit slot 32
moves to a position opposite to the lock pin 5.
[0031] For protecting the pole 31, a fixing tube 14 is fixed with
the bottom of the hub 2 and a sliding tube 15 is axially slidably
coupled to the fixing tube 14, and a spring 16 is disposed between
the upper end surface 121 of the sliding tube 15 and the hub 2, the
pole 31 is arranged in the fixing tube 14 and sliding tube 15, the
sliding tube 15 is capable of stretching out the fixing tube 14 to
cover the limit slot 32 of the pole 31 under the force from the
spring 16. When the pole 31 is plugged into and connected with the
insertion hole 21, the sliding tube 15 returns back into the fixing
tube 11 and abuts against the top surface of the runner 3. This
structure can improve locking stability due to an preload between
the pole 31 and the lock pin 5.
[0032] The specific embodiments described herein are merely
illustrative of the scope of the present invention. Technical
personnel skilled in the art to which the present invention
pertains can make various modifications or additions to the
specific embodiments described or replace them in a similar manner,
without departing from the spirit of the present invention or
beyond the scope defined by the appended claims.
LIST OF REFERENCED PARTS
[0033] 1 spoke [0034] 11 first rod [0035] 12 second rod [0036] 13
joint [0037] 131 U-groove [0038] 14 fixing tube [0039] 15 sliding
tube [0040] 16 spring [0041] 2 hub [0042] 21 insertion hole [0043]
22 mounting hole [0044] 3 runner [0045] 31 pole [0046] 32 limit
slot [0047] 33 eccentric plates [0048] 311 upper end portion [0049]
312 lower end portion [0050] 4 rib [0051] 5 lock pin [0052] 6
spring [0053] 7 pillar [0054] 8 first mount [0055] 9 second mount
[0056] 10 strut [0057] 71 parallelogram connecting rod structure
[0058] 711 first connecting bar [0059] 712 second connecting bar
[0060] 713 third connecting bar [0061] 714 fourth connecting
bar
* * * * *