Folding mechanism and stroller thereof

A folding mechanism for a stroller, the stroller comprising a cover, a front leg connector, a rear leg connector, and a front guard member, the front leg connector being pivoted to the cover, the rear leg connector being pivoted to the front leg connector and collapsible relative to the front leg connector, the front guard member being pivoted to the front leg connector, a pair of connection arms extending from the front guard member, the folding mechanism comprising:

• a rotatable member pivoted to the cover and detachably connected to the connection arm, an abutting portion protruding from the rotatable member;
• wherein when the rear leg connector is unfolding, the rear leg connector abuts against the abutting portion and drives the front guard member rotating relative to the cover to an unfolded position;
• when the rear leg connector is folding, the rear leg connector is detached from the abutting portion to release the front guard member to a folded position.