Collapsing device for a stroller

A collapsing device for a stroller is provided, including a framework consisting of two front feet, two rear feet, a lying frame, an extended frame and an inverted U-shaped handle pivotally combined with the front and rear feet. When a pusher unit fixed on the handle is pressed, the extended frame supporting a canopy is swung down to a collapsed position to lie on the lying frame. Then, the handle is swung down, with two connecters functioning as pivots for the handle to permit the handle to disengage from the front feet in moving to the collapsed position, responsive to a contact member of each connecter respectively separating from upper ends of the two front feet.

BACKGROUND OF THE INVENTION 
This invention relates to a collapsing device for a stroller, particularly 
to a device having a push unit which can move a frame supporting a canopy, 
for shading sunlight, from an extended position to a collapsed position, 
wherein the canopy supporting extended frame lies on a lying frame. An 
inverted U-shaped handle is pivotally connected to the two front feet of 
the stroller, in the extended position, and is disengaged from the front 
feet in the collapsed position, by means of two connecters fixed on the 
handle and connecting the handle with the two front feet. The handle is 
tilted down and is supported by the two rear feet of the stroller, which 
have their upper ends pivotally combined with the handle. 
Nowadays, collapsible strollers are widely used, having many kinds of 
collapsing devices for collapsing strollers with some advantages and some 
drawbacks. 
SUMMARY OF THE INVENTION 
This invention has been devised to provide a collapsing device for a 
stroller that is convenient to operate to collapse and extend. 
One feature of the invention is a push unit fixed on an intermediate 
portion of an inverted U-shaped handle for easily collapsing a stroller by 
pressing it down. Then, an extended frame positioned almost upright, to 
support a canopy in an extended position, can be disengaged from elastic 
lockers respectively fixed on an intermediate portion of two sides of the 
handle, so that the extended frame can be lowered down to lie on a lying 
frame in a collapsed position. 
Another feature of the invention is the inclusion of two connecters 
respectively fixed on two side portions of the handle, for disengaging the 
two ends of the two sides of the handle from the two front feet of the 
stroller, when the push unit is pressed to collapse the stroller. 
One more feature of the invention is the inclusion of two elastic lockers 
respectively fixed around an intermediate portion of the two side portions 
of the handle, locking the extended frame in the extended position, with 
two sideways projecting bars of the extended frame respectively engaging 
two notches of the two elastic lockers.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
A preferred embodiment of a collapsing device for a stroller, as shown in 
FIGS. 1 and 6, includes a main framework 1, wheels 13, a push unit 2, two 
connecters 3, 3, two elastic lockers 4, 4, two securing bases 36, 36 and 
an inverted U-shaped canopy frame 361 as main components that are combined 
together. 
The main frame 1 consists of a pair of front feet 11, 11, a pair of rear 
feet 12, 12, a lying frame 14, and an inverted U-shaped extended frame 15, 
and an inverted U-shaped handle 16. 
The pair of front feet 11, 11 and the pair of rear feet 12, 12, 
respectively have a lower end combined with a respective wheel 13. An 
intermediate portion of each of the front feet 11, 11 are pivotally 
combined with the lying frame 14. The lying frame supports a baby lying 
thereon. The lying frame 14 being displaceable with respect to the rear 
feet 12, 12. 
Two lower ends of the inverted U-shaped extended frame 15 are pivotally 
combined with the lying frame 14 so that the extended frame 15 may be 
swung upward from a collapsed position of lying on the lying frame 14 to 
an extended position for supporting a canopy 5. 
The inverted U-shaped handle 16 has two lower ends combined releasably with 
the upper ends of the pair of front feet 11, 11, by means of the two 
connecters 3, 3. The inverted U-shaped handle 16 is also pivotally 
connected with the pair of the rear feet 12, 12 by means of pivot pins. 
The push unit 2 is combined on an intermediate horizontal portion of the 
handle unit 16, as shown in FIG. 2, having a front cover 21 and a rear 
cover 22 respectively fixed on a front side and a rear side of the handle 
16 with screws 27. The front cover 21 has an inner cavity 211, a hole 212 
bored in a bottom side thereof. A pusher 23 is inserted through the bottom 
hole 212 into the cavity 211. The pusher 23 has an upper portion fixed 
with a pin 231 to two L-shaped arms 24, 25. The pin 231 passes through and 
is able to move in two slots 241, 251 of the two L-shaped arms 24, 25. The 
L-shaped arms 24, 25 are combined with the front cover 21 and the rear 
cover 22 in the inner cavity 211 with pins 242, 252, respectively fitted 
in an intermediate portion of the L-shaped arms 24, 25. Two pins 243, 253 
are respectively pivotally connected with upper ends of the arms 24, 25. 
Upper ends of two ropes 26, 26 are respectively bound to the pins 243, 
253. Each rope 26 extends through a respective lengthwise hole 161 of the 
two side portions of the handle 1. 
Each connecter 3 is respectively fixed on a lower end portion of the two 
side portions of the inverted U-shaped handle 16. Each connecter 3 has a 
first passageway 31 formed in a front portion thereof for a guide portion 
331 of a contact member 33 to fit therein. A second passageway 32 is 
formed in a rear portion of each of two lower ends of the handle 16. Each 
contact member 33 has an inlet 333 and a groove 332 behind the inlet 333 
for each rope 26 and a limiter 28, each limiter 28 being fixed to a lower 
end of a respective rope 26 to fit therein. A respective stopper 29 is 
used to close each of two lower ends of the handle 16. 
As shown in FIG. 3, the contact member 33, fitted into the first passageway 
31, has a vertical hole 334 formed in an upper portion. A spring 35 of a 
limit projection 34 is fitted into the vertical hole 334. Further, a 
securing base 36 of an inverted U-shaped canopy frame 361, for supporting 
a canopy 5, is pivotally connected at a proper location to each connecter 
3. Each connecter 3 further has a lengthwise hole 37 for receiving a push 
bar 371 therein. The push bar 371 can be pushed up by the guide portion 
331 of the contact member 33. 
Each securing base 36 is combined with a respective lower end of the 
inverted U-shaped frame 361, for supporting the canopy 5 when the canopy 5 
is extended, as shown in FIG. 8. 
Each elastic locker 4 is fixed around an intermediate portion of a 
respective one of the two sides of the handle 16, near an upper end of 
each connecter 3. Each elastic locker 4 has a front inner cavity 44, and a 
rear inner cavity 41 in which a spring 42 is received. A pin 43 passing 
through the lengthwise hole 163 f the handle 16 has two protruding ends 
respectively movable within the cavities 41, 44 of each elastic locker 4. 
Further, each elastic locker 4 has a notch 45 formed in an appropriate 
location in a lower edge for a sideways projecting bar 151 of the extended 
frame 15 to fit therein to lock the extended frame 15 in an extended 
position of the stroller. 
If the stroller is to be collapsed from an extended position shown in FIG. 
8 into a collapsed position shown in FIG. 9, referring to FIGS. 6 and 7, a 
user manually swings the two securing bases 36, 36 toward the handle 16, 
with the inverted U-shaped canopy frame 361 lying on the handle 16 and 
aligned with the front frame 11, with the canopy 5 collapsed. Next, the 
user presses down the pusher 23 of the push unit 2, forcing the two 
L-shaped arms 24 and 25 to pivot and thereby pull up the two ropes 26, 26. 
The two ropes 26, 26 then pull up the contact members 33, 33. Then the 
contact members 33, 33 respectively separate from the upper ends of the 
pair of the front feet 11, 11. At the same time, the push bars 371, 371 
are pushed up by the contact members 33, 33, the push bars 371, 371 
respectively pushing up the elastic lockers 4, 4 so that the notches 45, 
45 are separated from a respective sideways projecting bar 151 of the 
extended frame 15. The extended frame 15 is then lowered down to lie on 
the lying frame 14. Lastly, the U-shaped handle 16 is pushed rearward to a 
collapsed position. 
To extend the stroller from the collapsed position, shown in FIGS. 6, 7, 
into the extended position shown in FIG. 8, a user swings the handle 16 
upward and forward, letting the contact members 33, 33 fit into the upper 
ends of the front frame 11 respectively, by elasticity of the springs 35, 
35. If the canopy 5 is also to be used, as shown in FIG. 8, the inverted 
U-shaped frame 361 is swung forward to permit the canopy 5 to be extended 
and supported. Lastly, the extended frame 15 is swung up, letting the 
sideways protruding bars 151, 151 respectively engage the notches 45, 45, 
so as to secure the extended frame 15 in place for supporting the canopy 
5, thereby finishing the extension process of the stroller. 
While the preferred embodiment of the invention has been described above, 
it will be recognized and understood that various modifications may be 
made therein and the appended claims are intended to cover all such 
modifications which may fall in the spirit and scope of the invention.