0ne-hand operational control device of foldable stroller

A foldable stroller, comprising:

• a foldable supporting frame;
• a handle frame comprising two pivot arms extending downwardly;
• a pair of folding joints for pivotally connecting two lower ends of said pivot arms to two sides of said supporting frame respectively;
• an engagement unit comprising a pair of first engaging members provided at two lower ends of said pivot arms of said handle frame respectively and a pair of second engaging members provided at said two folding joints and securely engaged with said two first engaging members respectively, so as to lock up said handle frame with said supporting frame;
• and
• an one-hand operational control device, comprising:
• a turn switch, which is arranged to drive said first engaging members to disengage with said second engaging members respectively, comprising a central shaft which has a pusher cavity being firmly and coaxially mounted between two upper ends of said pivot arms and a turning handle which has a guiding slot being rotatably and coaxially mounted on said central shaft and arranged to drive said first engaging members to disengage with said second engaging members respectively, wherein said turning handle further comprises a blocking wall inwardly extended towards said pusher cavity;
• a locking unit comprising a locking latch disposed in said pusher cavity of said turn switch in a slidably movable manner and a finger trigger extended from said locking latch to outside through said guiding slot, wherein said locking latch is arranged to be driven by said finger trigger to move from a normally locking position to an locked position;
• and
• a resilient unit, which is disposed in said pusher cavity for applying an urging pressure against said locking latch so as to normally retain said locking latch at said locking position, wherein at said locking position, a locking portion of said locking latch is extended outwardly for blocking up said turn switch from being rotated by said blocking wall so as to lock up said foldable stroller from being folded up, and that at said unlocked position, said locking portion of said locking latch is moved away from said blocking wall of said turn switch so as to release said blocking up of said turn switch with respect to said pivot arms, therefore said turn switch is capable of being rotated to disengage said first engaging members with said second engaging members respectively.