Patent ID: 7871100

Claim:
A collapsible stroller comprising: a frame body comprising: an upper frame unit having two upper frame tubes, each having a first end and a second end; two connecting members, each having a first portion and a second portion that is bent at an angle with respect to the first portion, wherein the first portion is connected to the second end of the upper frame tube and a first locking device is provided at one of the first portion and the upper frame tube; two front legs, each having a first end and a second end, wherein the first end is lockably/unlockably connected to the second end of the upper frame tube through the first locking device so that the upper frame unit is able to pivotally collapse toward the front leg while unlocked, and the second end is coupled to a front wheel assembly of the stroller; two base frame tubes, each having a first end pivotally coupled to the first end of the front leg and a second end, wherein a rear wheel of the stroller is rotatably installed to the base frame tube at a position close to the second end; two rear legs, each having a first end pivotally coupled to the second portion and a second end pivotally coupled to the second end of the base frame tube; and a seat unit including a seat portion, a backrest portion pivotally coupled to the seat portion, and two linking members disposed at two sides of the seat unit respectively, one end of each linking member thereof being pivotally coupled to the second portion of the connecting member and the other end being pivotally coupled to the seat portion, wherein when the upper frame tubes are pivotally moved with respect to the front legs, as a result the upper frame unit, the front legs, the rear legs, the base frame tubes and the seat unit will move toward each other into a collapsed state in which they are substantially parallely stacked, wherein the linking member is pivotally connected to the connecting member at the same pivotal point as the rear leg.