Folding child's push chair

Folding child's push chair comprising two lateral chassis units, at least one transverse bracing member interconnecting said chassis units and which can be deformed for folding-up and unfolding of the push chair, wherein each lateral chassis unit comprises:

• a handle bar;
• a push bar integral with said handlebar,
• a front underframe,
• a rear underframe having an extension and a hinge pin,
• means for enabling the push bar to slide parallel to the front underframe, said enabling means including a sliding piece connected with an upper end portion of the front underframe,
• first and second sleeves, each being freely traversed by the push bar and the front underframe,
• a support piece connected to each of said first and second sleeves, said support piece extending downwards and having a bearing for said hinge pin of the rear underframe, the extension of said rear underframe having an extension extending beyond said hinge pin and
• a connecting rod articulated between an end portion of the extension of the rear underframe and a position next to a lower end portion of the push bar.