Frame structure for baby stroller with detachable infant carrier

A frame structure for baby stroller comprising:

• two front-leg tubes, said front.-leg tubes each having a first connector and a second connector;
• two rear-leg tubes;
• two handlebars respectively pivotally connected to the first connectors of said front-leg tubes;
• two bottom tubes respectively pivotally coupled between the second connectors of said front-leg tubes and said rear-leg tubes;
• wherein two front extension bars are respectively pivoted to the second connectors of said two front-leg tubes;
• two links are provided between said front-leg tubes and said front extension rods, said links each having a first end respectively pivoted to said front-leg tubes and a second end;
• two control devices are respectively coupled between said links and said front extension bars and controllable between a locking position to lock said links to said front extension bars and an unlocking position for enabling said front extension bars to be moved relative to said links and turned relative to said front-leg tubes;
• two quick-release locks are respectively applied on the front rod members of said front extension bars to hold a foldable front cross bar between said front extension bars for allowing movement of said foldable front cross bar along said front extension bars when unlocked said quick-release locks.