Stroller

A stroller is provided to have a "U" shaped handle, a pair of supports pivotally connected with the handle through a joint having a plurality of spaces provided therein for receiving a switch provided on and pivotally connected with the joint and a pair of detachable wheel mechanism respectively and securely mounted on a distal end of each of the support. The stroller is then able to be folded and used as a back-pack to continue to carry a baby within the stroller while walking in the field or over any rough terrain.

FIELD OF THE INVENTION 
The present invention generally relates to a stroller, and more 
particularly to a stroller which can be folded together and used as a 
back-pack. 
BACKGROUND OF THE INVENTION 
Strollers having a braking system for parking effectively, wheels for 
turning, and foldable means for storing the same have been widely used all 
over the world. By means of the above mentioned improved device, a user 
can provide a comfortable environment to a baby and convenience for 
herself/himself while walking outdoors. 
Most of the devices are designed to provide a better environment for babies 
while walking outdoors, especially on paved roads. Yet, it is very 
difficult to push a stroller while walking on a rugged road, because a 
general stroller normally has four wheels. 
Nowadays, recreation is emphasized for bringing families together, so, 
naturally, the number of outdoor activities will rise to meet the demand. 
Thus, if one of the families brings his/her child along to attend such an 
occasion, other family members will be busy pushing the stroller around in 
the wilderness. Even though they don't have to or can't push the stroller 
in some situations such as mountain climbing or crossing a river, they 
still have to carry the baby in their arms for a long time, which is very 
exhausting. Furthermore, when the baby is being carried over rough terrain 
to a smoother area, the stroller is left behind and so this result is 
clearly neither practical nor efficient. 
From the previous description, it is noted that especially when taking a 
field trip with baby, a general stroller will no longer meet the 
requirement. 
Thus, a stroller constructed in accordance with the present invention tends 
to mitigate and/or obviate the aforementioned problems. 
SUMMARY OF THE INVENTION 
The main objective of the invention is to provide a stroller which is able 
to be folded and used as a back pack to carry a baby therein. The stroller 
comprises only a pair of wheels and a plurality of foldable supports 
having a seat detachably attached to at least one of the supports. 
Another objective of the invention is to provide a stroller having a pair 
of detachable wheels which can be easily and quickly removed without any 
effort. 
Other objects, advantages and novel features of the invention will become 
more apparent from the following detailed description when taken in 
conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIG. 1, a stroller constructed in accordance with the present 
invention comprises a "U" shaped handle 10, a pair of supports 20, a pair 
of connectors 30 pivotally connected with the handle 10 and rigidly 
connected with the supports 20 and a pair of wheels 40 each having a 
braking system 50 mounted thereon and rotatably connected with the support 
20. The handle 10 is pivotally connected with the connector 30 by means of 
a joint 31 provided on the connector 30, such that the stroller of the 
invention is foldable only if the joint 31 is in a proper position. A 
cross bar 32 is also pivotally connected with the connector 30 through a 
retainer 33. It is to be noted that the braking system 50 is also 
pivotally connected within a wheel cover 41 and a brake pedal 51 is 
inserted into an opening 42 of the cover 41 to engage with the wheel 40 to 
accomplish the purpose of braking. 
Referring to FIGS. 2-5, it is to be noted especially from FIG. 2 that a 
part of the connector 30 incorporated with a substantially semi-circular 
hood (not numbered) form the joint 31. The joint 31 has a plurality of 
spaces (not labeled) provided therein and each space is configured to 
receive a switch 34 therein. The switch 34 is pivotally connected with the 
joint 31 by means of a pin 35 and a resilient member 36 is received within 
a slot 37 provided in the switch 34 and abutted by the pin 35. Thus, when 
the switch 34 is pressed downward into one space, the handle 10 is then 
released from the limitation of the joint 31 and is able to turn either 
clockwise or counterclockwise (in this case, the joint 31 is able to turn 
counterclockwise). It is better seen from FIG. 4 that the switch 34 is 
being pressed into the space and is rotated within the joint 31. The 
handle 10 will also be rotated when the switch 34 is rotated. Furthermore, 
the resilient member 36 within the slot 37 of the switch 34 will also be 
pressed due to the pin 35 when the switch 34 is being pressed downward. 
When the switch 34 reaches the next space, the switch 34 will eject out 
and again is limited by the joint 31 and the handle 10 is then rigidly 
positioned, as shown in FIG. 5. When the handle 10 is first positioned 
after the switch 34 is rotated and undergoes a distance, the status of the 
stroller is triangular as shown in FIG. 3. 
Referring to FIG. 6, if the switch 34 stops within the final space, the 
handle is then able to be pivoted with the support 20 thus folding the 
stroller for storage or use as a back pack. 
Referring again to FIG. 2, FIG. 7 and FIG. 8, it is shown that the cross 
bar 32 is retained by the retainer 33, therefore, the cross bar 32 is able 
to be held in that position. Thus, it is noted that the connector 30 
pivotally connected with the bar 32 is provided to have consecutive 
notches 331, and the retainer 33 is also configured to have a plurality of 
extensions 332 each received within a respective notch 331. An arcuate 
channel 333 having a spring 334 received therein is defined within the 
retainer 33. One end of the spring 334 urges against a second pin 335 
provided on the cross bar 32, such that when the retainer 33 is rotated 
counterclockwise, the spring 334 is pressed, as shown in FIG. 8, and then 
when one extension 332 of the retainer 33 coincides with the cross bar 32, 
the cross bar 32 then leaves the limitation of the retainer 33 and is 
therefore foldable. 
Referring to FIG. 9, a detachable wheel mechanism and a braking system 50 
are shown. The detachable wheel mechanism comprises a receiving member 61 
securely provided on a distal end of the support 20 and a hooking member 
62 securely provided on one side of the cover 41. When the stroller is in 
use, the hooking member 62 is securely abutted to the receiving member 61, 
and when the wheel 40 is no longer in need, a user will only have to pull 
back a finger 621 formed integrally with the hooking member 62, then the 
receiving member 61 will leave the limitation of the hooking member 62 and 
the wheel 40 together with the braking system 50 will eventually leave the 
support 20, as shown in FIG. 10. 
Referring to FIG. 11 and FIG. 12, one embodiments of the stroller is shown. 
A pliable seat 70 with two belts 71 is put on the stroller for providing a 
seat for baby. A first end of each belt 71 is securely fixed with the seat 
70, and a second end of each belt 71 is securely fixed with the receiving 
member 61, such that when the stroller is folded as the status as shown in 
FIG. 12, a user will easily carry the stroller of the invention on his/her 
back by means of the two belts 71. 
FIG. 13 shows the related status of the joint 31. The switch 34 is 
positioned in the last space as previously described, yet, the cross bar 
is still limited by the retainer 33 and keeps in an upright position as 
shown in FIG. 11 and FIG. 12, such that a baby will still have a full 
support when the stroller is folded. 
From the foregoing, it is seen that the objects hereinbefore set forth may 
readily and efficiently be attained, and since certain changes may be made 
in the above construction and different embodiments of the invention 
without departing from the scope thereof, it is intended that all matter 
contained in the above description or shown in the accompanying drawings 
shall be interpreted as illustrative and not in a limiting sense.