Patent ID: 7862053

Claim:
A golf bag cart foldable device, comprising: a.) a bottom cart stand, having a link segment at its top, where both sides of the link segment each is in pinned connection with a rear wheel frame which has its bottom end join the rear wheel, and said bottom cart stand being provided with a slider at the bottom of the link segment; b.) an upper cart stand, in pinned connection with the link segment of said bottom cart stand at its bottom, and having a bracket at its top, where the bracket couples to a mount at its one end; c.) a handle bar, joined the mount of said upper cart stand at its bottom at which an angle adjustable joint is located, having a score board at its top; and d.) a linkage set, comprising first linkages, second linkages and a third linkage, where the first linkage is set up between said upper cart stand and the slider of said bottom cart stand, to link said upper cart stand physically to the slider, and the second linkage being set up between the slider of said bottom cart stand and rear wheel frame, to link the slider physically to the rear wheel frame, while the third linkage is set up between the mount of said upper cart stand and the first linkage, to link said upper cart stand physically to said handle bar; wherein during the folding, said handle bar being first pushed down, and through the linking of the linkage set, the angles between said upper cart stand and said handle bar and between said bottom cart stand and the rear wheel frame getting smaller, for the contraction and merging, and also the folding of the rear wheels; on the contrary, once said handle bar being pulled up, and through the linking of the linkage set, the angles between said upper cart stand and said handle bar and between said bottom cart stand and the rear wheel frame getting wider, which is then ready for a fixing, to achieve a convenient use.