Outdoor sun shade

The present invention consists of a screen-rolling device, two fixing frames for mounting the screen-rolling device on the roof of a car and two support frames for mounting the screen-rolling device on the ground, wherein the screen-rolling device is designed to adjust and control stretching or rolling a canvas screen through a twisting spring set which can generate a twisting force along with the rotation of a movable tube, the fixing frames are designed to mount the screen-rolling device on the roof of a car, and the support frames are designed to mount the canvas screen of the screen-rolling device on the ground so as to form an outdoor sun shade.

BACKGROUND OF THE INVENTION 
At weekends or on holidays, family members and/or good firends going to 
country-side by car for leisure activites such as sighteeing, fishing, 
camping, picnic, etc. have been very popular gradually so as to relax 
their daily busy and tense moods. However, most outdoor sites in the field 
in general are empty and extensive and lack of adequate buildings for 
shading the hot sunshine. As a matter of fact, to proceed with an outdoor 
activity in hot weather is rather intolerable. If a car is equipped with a 
sun shade, the people can use such an outdoor sun shade to proceed with 
their leisure activities without being suffered from the hot sunshine. The 
present invention is aimed at solving the foregoing problem. 
SUMMARY OF THE INVENTION 
The present invention consists of a screen-rolling device, two fixing 
frames for mounting the screen-rolling device on the roof of a car and two 
support frames for mounting the screen-rolling device on the ground, 
wherein the screen-rolling device is designed to adjust and control 
stretching or rolling a canvas screen through a twisting spring set which 
can generate a twisting force along with the rotation of a movable tube, 
the fixing frames are designed to mount the screen-rolling device on the 
roof of a car, and the support frames are designed to mount the canvas 
screen of the screen-rolling device on the ground so as to form an outdoor 
sun shade.

DETAILED DESCRIPTION 
As shown on FIGS. 1, 2 and 10, the present invention consists of a 
screen-rolling device 1, two fixing frames (2) for mounting the 
screen-rolling device (1) on the roof of a car (3), and two support frames 
(4) for mounting the screen-rolling device (1) on the ground. 
As shown in FIGS. 1, 2, 3, 4 and 6, the screen-rolling device (1) consists 
of a left fixing seat (10), a right fixing seat (20), a movable seat (30), 
a fixing rod (40), a shaft lever (50), a twisting spring set (60), a catch 
element (70), a movable tube (80) and a canvas screen (90). One end of the 
canvas screen (90) is fixed on the movable tube (80) and can be rolled by 
the movable tube (80), and another end thereof is provided with a tie rod 
(91) for stretching the canvas screen (90). 
As shown therein, each of two ends of the fixing rod (40) is provided with 
an insert hole (41). After the two ends of the fixing rod (40) are 
respectively inserted in two fixing holes (11A, (21A) on the left fixing 
seat (10) and the right fixing seat (20), these two ends of the fixing rod 
(40) can be respectively fixed on the left fixing seat (10) and the right 
fixing seat (20) by means of two pins (12), (22); in addition, each of two 
ends of the shaft lever (50) is also respectively provided with an insert 
hole (51), one end of the shaft lever (50) is provided with a loop coter 
(52), and both the shaft lever (50) and the loop coter (52) are inserted 
in a fixing hole (11B) on the left fixing seat (10). After another end of 
the shaft lever (50) is inserted in a fixing hle (21B) on the right fixing 
seat (20), the shaft lever (50) is also respectively fixed on the left 
fixing seat (10) and the right fixing seat (20) by the said two pin (12), 
(22) without coming off therefrom. 
As shown in FIGS. 3, 4, 5 and 6, the twisting spring set (60) consists of a 
larger twising spring (61), a middle twisting spring (62), a smaller 
twising spring (63) and two connecting thimbles (64), (65) for connecting 
these three twisting springs (61), (62), (63). Two hook holes (64A) and 
(65A) are respectively provided on the two side walls of these two 
connecting thimbles (64), (65). A hook is provided at each of two ends of 
each of these three twisting springs (61), (62), (63) respectively, 
wherein the hook (61A) at one end of the larger twisting spring (61) is 
hooked and fixed in the hook hole (64A) on the connecting thimble (64), 
two hooks (62A), (62B) at two ends of the middle twisting spring (62) are 
respectively hooked and fixed in the hook holes (65A), (64A) on the 
connecting thimbles (65), (64) respectively, and the hook (63B) at one end 
of the smaller twisting spring (63) is hooked and fixed in the hook hole 
(65A) on the connecting thimble (65). After these three twisting springs 
(61), (62), (63) and these two connecting thimbles (65), (65) are 
assembled as a twisting spring set (60), the shaft lever (50) can be 
nested in the twisting spring set (60). As shown in the drawings, the hook 
(63A) at another end of the smaller twisting spring (63) is first hooked 
and fixed in a hook hole (53) nearby the center of the shaft lever (50), 
and the hook (61B) at another end of the larger twisting spring (61) is 
then hooked and fixed in a hole (71) on a catch element (70), the assembly 
of the twisting spring set (60) is finished. 
As shown in FIGS. 3, 4, 5, 6 and 7, the twisting spring set (60) is nested 
on the shaft lever (50), the movable tube (80) is nested on the twisting 
spring set (60), and the right end of the movable tube (80) is provided 
with a slot (81). One side of the catch element (70) is provided with a 
hook hole (71) and a convex block (72), and another side thereof is a gear 
(73), the hook hole (71) is designed to hook and fix the hook (61B) of the 
larger twisting spring (61), and the convex block (72) can be inserted in 
the slot (81) on the movable tube (80) so as to combine the catch element 
(70) and the movable tube (80) together through insertion. As shown in the 
said drawings, since the shaft lever (50) has been fixed on the two fixing 
seats (10) (20), and the hook (63A) of the twisting spring set (60) is 
fixed in the hook hole (53) on the shaft lever (50), so the said hook 
(63A) can be regarded as a "fixing end" of the twisting spring set (60) as 
a w,hole. In addition, the convex block (72) on the catch element (70) is 
inserted and fixed in the slot (81) on the movable tube (80), so the catch 
element (70) and the movable tube (80) are combined together; and another 
hook (61B) of the twisting spring set (60) is fixed in the hook hole (71) 
on the catch element (70), so the hook (61B) can be regarded as a "movable 
end" of the twisting spring set (60) as a whole. Therefore, when the unser 
applies a force to stretch open the canvas screen (90), the movable tube 
(80) can be actuated to rotate so as to further rotate the catch element 
(70) and the twisting spring set (60) at the same time and to force the 
twisting spring set (60) to generate a twisting force; and when the user 
releases the canvas screen (90), the twisting force of the twisting spring 
set (60) will force both the catch element (70) and the movable tube (80) 
to rotate in an opposite direction so as to fully roll the canvas screen 
(90), and at the same time, the twisting spring set (60) restores its 
original state of no twisting force. 
In the foregoing twisting spring set (60), the wire diameters of larger, 
middle and smaller twisting springs (61), (62), (63) are 1.4 mm, 1.3 mm 
and 1.2 mm respectively in sequence. The twisting spring set (60) consists 
of these three springs (61), (62), (63) with the different wire diameters, 
and when a force is applied to the twisting spring set (60) to twist, 
firstly to twist the larger twisting spring (61) and then to twist the 
middle and smaller twisting spring (62), (63) in sequence, so the twisting 
force thereof as a whole is transmitted progressively, and the twisting 
spring set (60) will never lead to such drawbacks as unequal spring 
density and uneven density in the front and rear sections of spring, and 
the life of expectancy of the twisting spring set (60) can be prolonged. 
As shown in FIGS. 2, 3, 4, 6 and 8, the movable seat (30) is provided with 
an upper toggle (31) and a lower toggle (32) in a symmetrical state, the 
upper toggle (31) is nested on the fixing rod (40) and the lower toggle 
(32) is nested on the shaft lever (50) so that the movable seat (30) can 
slide left and right on the fixing rod (40) and the shaft lever (50); as 
shown in the foregoing drawings, one side of the movable seat (30) is 
provided with a convex grip (33) to control the movable seat (30) sliding 
left and right, and the outer perimeter of the lower toggle (32) on 
another side of the movable seat (30) is provided with a knob (35) with a 
notch (34); in addition, a stop block (36) with elasticity is inerted on 
the wall of the lower toggle (32), so when the movable seat (30) moves 
left to nest the gear (73) of the catch element (70) in the lower toggle 
(32) of the movable seat (30) as shown in FIG. 6, and the elastic stop 
block (36) is just in the notch (34) on the knob (35) as shown in FIG. 8, 
the user stretches or rolls the canvas screen through rotation, an 
elastic, intermittent and sectional catch action is generated between the 
elastic stop block (36) and the gear (37) so as to effectively adjust and 
control the desirable length of stretching or rolling the canvas screen 
(90) without limitlessly stretching or rolling the canvas screen (90) out 
of control. After the user has set the desirable length of stretching or 
rolling the convas screen (90) as shown in FIG. 9, the knob (35) can be 
rotated to press the elastic stop block (36) to be tightly caught in the 
gear (73), so the movable tube (80) cannot rotate any more in order to 
achieve the purpose of positioning the canvas scren (90). 
As shown in FIGS. 2, 3, 4 and 6, a separate brake rod (37) is inside the 
grip (33) on the movable seat (30), the front end of the grip (33) is a 
hook (38) which can catch a catch seat (23) at the lower end of the right 
fixing seat (20) so as to fix the movable seat (30) on the right fixing 
seat (20) as shown in FIG. 7, the gear (73) of the catch element (70) is 
released from the lower toggle (32) of the movable seat (80) so that the 
movable seat (30) is in a free state, the user can quickly stretch or roll 
the canvas screen (90). Furthermore, a compression spring (39) is provided 
inside the grip (33) and nested on the shaft lever (50). As shown in FIG. 
9, when the movable seat (30) has been fixed on the right fixing seat 
(20), the compression spring (39) is in a state of compressed tensile; and 
when the user pushes the hook (38) of the brake rod (37) away from the 
catch seat (23) of the right fixing seat (20) as shown in FIG. 8, the 
compression spring (39) will use its own compressed tensile to move the 
movable seat (30) left so as to nest the lower gottle (32) on the gear 
(73) of the catch element (70) once again. 
As shown in FIGS. 1 and 10, the fixing frame (2) consists of a foldable 
foot rest (210), a hollow tube (220), a cap (230), a foot rest rope (240), 
a cap rope (250), four catches (260), two hooks (270), a support seat 
(280), an upper clip (291) and a lower clip (292), wherein the foldable 
foot rest (210) consists of two corresponding round concave plates (211) 
to pivotally nest a thimble (212) so that the foldable foot rest (210) can 
be stretched open or folded down. Each bottom end of two round concave 
plates (211) is provided with two rope holes (213) and a soft pad (214), 
the rope holes (213) are designed to let the foot rest rope (240) pass 
therethrough, and the soft pad (214) is designed to prevent the foot rest 
(210) from scraping sheet metal when mounting the foot rest (210) on the 
roof of a car (3). 
As shown in FIGS. 10 and 13, the hollow tube (220) is inserted in the 
thimble (212) of the foot rest (210) and fixed therein through locking a 
bolt (215) in a concave slide way (221) on the perimeter of the hollow 
tube (220). A U-shaped catch (222) is nested in the top end of the hollow 
tube (220), and a spring catch (223) is nested in the bottom end thereof, 
two ends (224) of the U-shaped catch (222) can be caught in the catch 
holes (281) on the support seat (280) so that the hollow tube (220) and 
the support seat (280) can be combined together; and the spring catch 
(223) can be caught in an upper hole (A) or lower hole (B) on the thimble 
(212) so as to adjust and control a higher or lower position of the hollow 
tube (220) in the thimble (212). 
As shown in FIGS. 10 and 13, four catch holes (281) at the center of 
support (280) are designed to catch the two ends (224) of the U-shaped 
catch (222), and two threaded holes (282) on each of two sides of the 
support (280) are designed to lock four screws (283) therein so as to fix 
the upper clip (291) and the lower clip (292). A soft liner (293) is 
adhered to the inner wall of upper and lower clips (291), (292), so when 
the fixing rod (40) of screen-rolling device (1) is clipped and fixed by 
the upper and lower clips (291), (292), the soft liner (293) can step up 
the clamping force of these two clips (291), (292) to clip and fix the 
fixing rod (40), and the screen-rolling device (1) can be stably mounted 
on the fixing frame (2). As shown in FIG. 10, a soft gasket (284) can also 
be provided to the bottom surface of support (280) so as to let the 
support seat (280) be more beautiful and practical. 
The cap (230) is nested at the top end of the foldable foot rest (210), and 
two opposite rope holes (231) on two sides of the cap (230) are designed 
to let the cap rope (250) pass there-through. Each catch (260) is provided 
with three catch holes (261) and two clamps (262), and the hook (270) is 
provided with a hook hole (271) and a hook (272). When to apply the cap 
rope (250) and the foot rest rope (240) thereto, the four catches (260) 
are respectively fixed on the two opposite foot rest ropes (240) and two 
opposite cap ropes (250) which are caught in the hook holes (271) on two 
hooks (270) respectively. 
As shown in FIGS. 1 and 11, the support frame (4) consists of two toggles 
(410), two cross bars (420), two upright bars (230) and four fastening 
elements (440), wherein the two toggles (410) are directly mounted on the 
two ends of the fixing rod (40) of the screen-rolling device (1), each 
toggle (410) has a catch hole (411) to catch a movable hook (423) on the 
cross bar (420); one end of the cross bar (420) is a threaded connector 
(421) to engage with a threaded sleeve (443) on the fastening element 
(440), and another and thereof is a hook seat (422) whereon a movable hook 
(423) is pivotally provided. A foot pad (431) nested at the bottom end of 
the upright bar (430) is designed to let the said bottom end stably stand 
up on the ground without coming off therefrom, and the top end of the 
upright bar (430) is also a threaded connector (432) to engate with the 
threaded sleeve (443) of another festening element (440) so that the 
upright bar (430) can stand up on the ground. 
As shown in FIGS. 11 and 12, the fastening element (440) consists of a 
fastening clip (441), a clamping block (442) and a threaded sleeve (443), 
wherein the lower end of the fastening clip (441) can be nested in and 
extend out from a narrow hole (444) at the center of the clampingg bloci 
(442) and inserted in a guide hole (445) at the center of the threaded 
sleeve (443) at the same time, so the fastening clip (441), the clamping 
block (442) and the threaded sleeve (443) can be combined together through 
inserting two pins (446) in the threaded sleeve (443) without coming off 
therefrom. As shown in FIG. 11 and 12, when two fastening clips (441) of 
four fastening element (440) are respectively nested at the two ends of 
the tie rod (91) of the screen-rolling device (1), the threaded connectors 
(421), (432) at one each end of two cross bars (421) and two upright bars 
(430) are respectively engaged with the threaded sleeves (443) of the four 
fastening elements (440), and at the same time, through the screwing 
operation, the threaded connector (443) can push the clamping block (442) 
of the fastening element (440) upward to force the clamping block (442) 
tightly clamping the fastening clip (441) so as to fix each cross bar 
(420), upright bar (430) and tie rod (91) without coming off therefrom 
each other. As shown in FIG. 12, when the threaded connector (421) of 
(432) of the cross bar (420) or the upright bar (430) is screwed 
counterclockwise, the clamping block (442) and the fastening clip (441) 
can be released from each other in favor of the user's adjusting the 
positions of each cross bar (420) and upright bar (430). 
As shown in FIG. 1, when to assemble the present invention, firstly to 
stretch open the foldable foot rests (210) of two fixing frames (2) to 
stand up on the two sides of the roof of a car (3), then to hook the hooks 
(270) on the flanges on the margins of the roof of the car (3), to use the 
four catches (260) to adjust the tightness of the foot rest rope (240) and 
the cap rope (250), and to tightly pull and fix the foldable foot rest 
(210) so as to finish the construction of the fixing frames (2); nest, to 
mount and clamp the fixing rod (40) of the screen-rolling device (1) on 
the two clips (291), (292) at the upper ends of the hollow tubes (220) of 
the two fixing frame (2), and to use the movable hook (423) to hook one 
end of the cross bar (420) to connect the fixing rod (40) through hooking 
the movable hook (423) in the catch holes (411) on the toggles (410) at 
the two ends of the fixing rod (40), the threaded connector (421) on 
another end of the cross bar (420) has been engaged with the threaded 
sleeve (443) on the tie rod (91) provided to the canvas screen (90) of the 
screen-rolling device (1), so the stretched open canvas screen (90) can be 
fixed through the construction of the two cross bars (420); and finally, 
to engage the threaded connector (432) at the top end of the upright bar 
(430) with the threaded sleeves (443) having been nested on the tie rod 
(91) so as to fix the tie rod (91) and the two upright bars (430) together 
and to let the two upright bars (430) stand up on the ground, and then we 
can use the stretched open canvas screen (90) as a sun shade. 
As shown in FIGS. 14 and 15, another example of fixing frame (5) is 
designed for the roof of a sation wagon 6 having been equipped with a 
loading rack (61), and consists of two cross pivotally connected movable 
arms (520), two U-shaped nesting elements (510), a clamping seat (530) and 
two toothed snap rings (540), wherein the two U-shaped nesting elements 
(510) are directly nested on the loading rack (61) on the roof of a 
station wagon (6) to movably slide thereon for adjusting a desirable 
postion through locking a bolt (512) with a butterfly nut (511) in a 
rectangular hole (521) at the lower end of each one of these two movable 
arms (520) since the bolt (512), before being locked, can movably slide in 
the rectangular hole (521). After we set these two U-shaped nesting 
elements (510) in a desirable position on the loading rack (61) on the 
roof of a station wagon (6) and lock the bolt (512) in a desirable 
position in the rectangular hole (521), these two U-shaped nesting 
elements (510) and these two movable arms (520) are combined together with 
the loading rack (61). 
As shown in FIGS. 14, 15 and 16, through a bolt (522) passing through the 
two rectangular holes (523) at the upper ends of these two movable arms 
(520), these two movable arms (520) can be fixed together and the position 
of stretching open (as shown in FIG. 16) or folding down (as shown in FIG. 
17) thest two movable arms (520) can be adjusted. The clamping seat (530) 
is movably pivoted at the top ends of these two movable arms (520), the 
top surface of the clamping seat (530) is provided with a clamping piece 
(531) of which the opposite sides are provided with two corresponding 
movable hook clips (532) through which a plurality of catch slots (541) on 
the peripheral surface of the toothed snap rings (540) can be caught to 
combine the fixing rod (40) with the clamping seat (530). 
As shown in FIG. 14 and 15, the two toothed snap rings (540) are 
respectively nested at the two ends of the fixing rod (40) of the 
screen-rolling device (1). Upon assembly for use, firstly to nest the 
U-shaped nesting elements (510) on the two fixing frames (5) directly on 
the loading rack (61) on the roof of the station wagon (6), next to lock 
the two movable hook clips (532) of the clamping seat (530) in the catch 
slots (541) on the toothed snap ring (540) so as to stretch open the 
fixing frame (5) to stand up on the roof of the station wagon (6) and to 
install the screen-rolling device (1), then we can stretch open the canvas 
screen (90) and install the support frames (4) on the ground to be a ready 
outdoor sun shade. 
In view of the above, the structure of the present invention is really a 
novel outdoor sun shade which is very practical and advanced and therefore 
patentable.