Baby carriage

A baby carriage, comprising a frame and a seat mounted onto the frame, the frame including a support rack and a pair of handle sets, wherein:

• the support rack includes at least one holding member, a front tube fastened to a lower side of the holding member and a rear tube hinged on the lower side of the holding member, the front tube including an extension hole near the middle portion thereof and a retraction hole close to a front lower end thereof coupled with a front wheel set;
• the rear tube including a rear lower end coupled with a rear wheel set;
• the front wheel set further including a lateral wheel at a front end thereof;
• the handle set is fastened to the holding member of the support rack and includes a handgrip, an elevation set, a folding set, a flexible member and an outer sleeve;
• the handgrip including a coupling portion which is coupled with a driving member on an outer side;
• the elevation set including a driven member, an adjustment member, a driven bar and a coupling member;
• the driven member including an upper latch slot;
• the adjustment member including an insertion portion at one end thereof that includes a passage run through by the driven member and is inserted into the coupling portion, and also including an insertion hole at a lower end thereof and an adjustment knob at one side that includes a pressing portion and a longitudinal hole;
• the driven bar including a transverse hole at an upper end corresponding to the longitudinal hole of the adjustment knob, a chamber close to a lower end to hold an elastic element, and a diagonal slot at the lower end thereof;
• the coupling member including an upper end inserted into the insertion hole of the adjustment member, a hollow tube run through by the driven bar, a fastening hole at a lower end thereof corresponding to the diagonal slot to hold a positioning plate which includes a lug, and a winding portion at a distal end thereof;
• the folding set including a lower driving member, an upper driving member, an elastic pin and an elastic member;
• the lower driving member and the upper driving member being slid relative to each other and including respectively a first pin hole and a second pin hole corresponding to each other and inserted by the elastic pin;
• the first pin hole being located within a notch with a slanted surface;
• the lower driving member including a lower latch slot at an upper end thereof;
• the elastic member being interposed between the lower driving member and the upper driving member;
• the flexible member including one end fastened to the upper latch slot of the driven member and wound on the winding portion of the coupling member for one coil and another end fastened to the lower latch slot of the lower driving member;
• the outer sleeve being coupled on the outer sides of the elevation set and the folding set and including a plurality of adjustment holes formed on a lower wall thereof.