Note: Descriptions are shown in the official language in which they were submitted.
CA 02551222 2006-06-22
AN INTROVERTED TENT FRAME OF LARGE FRAME TENT
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tent frame, and more particularly to an
intro-
s verted tent frame structure in large frame tent.
2. Description of Prior Art
In accordance with prior art, the conventional large frame tent is similar
with the
small frame tent in the structure, as shown in Fig. 1 and Fig. 1A, it is
typically com-
prised of four poles and roof cross braces, between two adjacent poles proper
number
sets of cross braces are located for facilitating to pitching or striking.
Evidently, the dif
ference between them is that there are at least two sets of cross braces set
upon the two
adjacent poles, after pitching up, the four poles stand on the ground rightly,
the two or
three sets of cross braces connecting over two adjacent poles are stretched
out fully,
then over with awning on the located frame to finish a frame tent up.
Obviously said
1 S four poles of the large frame tent bearing the load is much more than a
small one, so the
so big load exerting on the poles often makes the poles swing, even occur the
tent un-
stable, especially to the vertical poles.
For overcoming said problem, an introverted tent frame came out, as shown in
Fig. 2, after pitching the tent up, the four introverted poles bearing the
vertical load
make the whole frame more stable than the conventional vertical poles without
any
swinging. For achieving the introverted poles, the cross brace set is shown in
Fig. 2A, in
which the hinged immovable ledge of the sliding hub fitting on the pole is
stretched out
longer than the prior art (comparing to Fig. 1A), so that a bracing strut 31'
of said cross
brace set 3' is hinged on the outer end of the hinged immovable ledge 41',
therefore as
2~ pitching the tent up, the poles are pushed by the sliding hub 4', and
tilted out at the feet
to form the introverted state at the top end. But this project also has
shortcoming: due to
the longer hinged immovable ledge 41', the folded framework of the tent
appears to in-
troverted shape keeping into trapezium small head and big foot, so the volume
of folded
framework is still bigger than desired, inconvenient for storing.
CA 02551222 2006-06-22
OBJECTS AND SUMMARY OF THE INVENTION
It is therefore a main object of the present invention to provide an
introverted
tent frame of large frame tent, in which the poles appears introverted state
as pitched up,
and appears vertical state as folded up.
For achieving the above-mentioned object, the present invention provides an
introverted tent frame of large frame tent, which is typically comprised of
four poles
and roof bracing struts, between two adjacent poles there are cross inter-
pivoted brace
sets set upon, said inter-pivoted brace set includes two cross bracing struts;
on the other
side, a sliding hub fitting on the pole in movable connection is connected to
a bracing
strut of the brace set in hinging connection; wherein, on the bracing strut
hinged on the
sliding hub, the distance from the cross pivoted point to the hinged point of
the sliding
hub is longer than the distance from the cross pivoted point to the other
hinged point of
the other bracing strut in the brace set.
In said introverted tent frame of large frame tent, there are at least two
cross
brace sets between two adjacent poles.
Said bracing strut hinged on the sliding hub is kept that the distance from
the
cross pivoted point to the hinged point of the sliding hub is longer 2 to 8 cm
than the
distance from the cross pivoted point to the hinged point of other bracing
strut in this set.
As utilizing above-mentioned project, due to the longer distance of the
bracing
strut hinged on the sliding hub than others, as pitching up the tent, the
sliding hub is
tilted under the pushing coming from the bracing strut hinged on the sliding
hub, further
to introvert the pole to stretch out at the foot, so that the whole framework
appears in-
troverted state for meeting the stable support goal.
As folding up, due to closing bracing struts of the brace sets, the poles is
brought
to close together, in this time, the longer bracing strut pushes the sliding
hub sliding
along the pole continuously until the pole is turned to vertical state, so the
folded
framework appears to square structure, therefore the volume of the folded tent
is smaller
than the prior art, and save space as storing.
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CA 02551222 2006-06-22
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a scheme of the prior art.
Fig. 1 A is an enlarged view showing the part of Fig. 1.
Fig. 2 is a scheme showing another embodiment of the prior art.
Fig. 2A is an enlarged view showing the part of Fig. 2.
Fig. 3 is a scheme of the present invention.
Fig. 4 is a scheme showing the folded state of the present invention.
Fig. 5 is a scheme showing another embodiment of the present invention.
CA 02551222 2006-06-22
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Fig. 3, an introverted tent frame of large frame tent provided by
the
present invention is typically comprised of four poles 1 and roof bracing
struts 2, be-
tween two adjacent poles 1 there are at least two cross inter-pivoted brace
sets 3 set
upon for pitching and striking up the tent. Wherein, said four poles 1 can be
telescoped
along the axils for further reducing the folded volume; on each pole 1 a
sliding hub 4 is
attached on in sliding fit, and a radial hinged immovable ledge 41 is extended
out from
the outside wall for hinging a bracing strut 31 of the cross brace set 3 on;
on the tip end
of each pole 1 a static hub 5 is fixed on for hinging the another bracing
strut 32 of the
cross brace set 3.
Said cross inter-pivoted brace set 3 includes two cross inter-pivoted bracing
struts 31 32, and they are respectively hinged on the static hub 5 and the
sliding hub 4
with one ends, or pivoted on the another cross brace set 3 end by end.
The difference is that on the bracing strut 31 hinged on the sliding hub 4,
the dis-
I S tance L 1 from the cross pivoted point to the hinged point on the sliding
hub 4 is longer
than the distance from the cross pivoted point to the hinged point of another
bracing
strut 32 of the cross brace set 3, the difference is selected in the range
from 2 to 8 cm.
Referring to Fig. 4, as folding up, because the cross bracing sets 3 are
closed up,
the poles 1 is brought to close to the center too, in this time, the longer
bracing strut 31
pushes the sliding hub 4 sliding along the pole 1 continuously until the pole
1 is turned
to vertical state, so the folded framework appears to square structure,
therefore the vol-
ume of the folded tent is smaller than the prior art, and save space as
storing.
In the present invention, the number of the cross brace sets depends on the
size
of the frame tent, as shown in Fig. S; there are three sets 3 setup on between
two adja-
cent poles 1. it can be another choice, for example, one coordinating sides
possess three
cross brace sets, and another coordinating sides possess two cross brace sets
to structure
a rectangular shape frame tent.
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