Patent ID: 8292321

Claim:
A golf bag cart foldable device comprising: 1.) a bottom cart stand having a plate joint, wherein the plate joint is in pinned connection with a rear wheel frame at each of two laterals to connect to rear wheels, with the bottom cart stand connected to a bottom of a bag base, wherein the bottom of the bag base is joined to a front wheel frame to connect to a front wheel; 2.) an upper cart stand having a winding member to pivotally connect to the plate joint; 3.) a sliding chunk set on the bottom cart stand and slideable along the bottom cart stand, with the sliding chunk set including an active sliding chunk and a passive sliding chunk; 4.) a link set, including a plurality of links, connecting to the upper cart stand, the bottom cart stand, the front wheel frame, the rear wheel frames and the sliding chunk set respectively, to form links between the upper cart stand and the bottom cart stand and between the front wheel frame and the rear wheel frame; and 5.) a folding joint on the winding member of the upper cart stand, with the folding joint having a buckle for release of the folding joint first, and by the upper cart stand being pulled by the link set, simultaneous unfolding or folding of the upper cart stand, the bottom cart stand, the front wheel and the rear wheels is accomplished, followed by locking for the folding joint, to enable a mutual locking between the upper cart stand and the bottom cart stand, to facilitate handiness in use.