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A collapsible golf trolley comprises a handle, a first rod, a second rod and a third rod. The handle and the first rod are connected by a coupling. The first rod and the second rod are connected by a first upper coupler and a first lower coupler. The second rod and the third rod are connected by a s

A collapsible golf trolley comprises a handle, a first rod, a second rod and a third rod. The handle and the first rod are connected by a coupling. The first rod and the second rod are connected by a first upper coupler and a first lower coupler. The second rod and the third rod are connected by a second upper coupler and a second lower coupler. A first round joint is disposed on the coupling. A second round joint is disposed between the first upper coupler and the first lower coupler. A third round joint is disposed between the second upper coupler and the second lower coupler. A first bracket is disposed on the second rod. A second bracket is disposed on the third rod. First and second wheel support frames are connected to the joint block. The first wheel support frame connects and supports a first wheel. The second wheel support frame connects and supports a second wheel.

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[ I claim:] [1.] A collapsible golf trolley comprising:a handle, a first rod, a second rod, and a third rod;said handle and said first rod connected by a coupling;said first rod and said second rod connected by a first coupler which has a first upper coupler and a first lower coupler coupling with s

[ I claim:] [1.] A collapsible golf trolley comprising:a handle, a first rod, a second rod, and a third rod;said handle and said first rod connected by a coupling;said first rod and said second rod connected by a first coupler which has a first upper coupler and a first lower coupler coupling with said first upper coupler;said second rod and said third rod connected by a second coupler which has a second upper coupler and a second lower coupler coupling with said second upper coupler;a first round joint disposed on said coupling;a second round joint disposed between said first upper coupler and said first lower coupler;a third round joint disposed between said second upper coupler and said second lower coupler;a first bracket disposed on said second rod;a second bracket disposed on said third rod;a bag receiving seat disposed at a lower end of said third rod;a hinged joint block fastened on said third rod, first and second wheel support frames connected to said hinged joint block, said first wheel support frame connecting and supporting a first wheel, said second wheel support frame connecting and supporting a second wheel;said first round joint comprising a hollow inner disk, a hollow outer disk coupling with said hollow inner disk, and a round cover covering said hollow inner disk, said round cover having a rib disposed on an outer face of said round cover, at least a rim flange disposed on a rim of said round cover, and a threaded rod extending inward from a center of said round cover, said hollow inner disk having a peripheral outer wall, a hollow cylinder surrounded by a plurality of annular teeth toward said hollow outer disk, an annular groove defined between said peripheral outer wall and said hollow cylinder, a plurality of protrusions disposed on a face of said hollow cylinder toward said hollow outer disk, a center hole formed in a center of said hollow cylinder, first and second annular walls abutting an inner periphery of said peripheral outer wall toward said round cover, at least a tapered bevel edge formed on a top of said first annular wall, and an inner plate extending from said second annular wall toward said round cover, said first annular wall higher than said second annular wall, said hollow inner disk connecting an upper end of said first lower coupler, said hollow outer disk having a cylindrical disk disposed in said hollow outer disk, a plurality of blind holes disposed on a face of said hollow cylindrical disk toward said hollow inner disk, a through hole formed in a center of said cylindrical disk, a plurality of annular serrations disposed in said hollow outer disk toward said hollow inner disk, and an annular recess formed on an opening of said cylindrical disk, said hollow outer disk connecting said handle, a spring inserted in said center hole of said hollow cylinder and said through hole of said cylindrical disk, said hollow outer disk coupling with said hollow inner disk, one end of said spring inserted in said annular recess, said threaded rod passing through said center hole of said hollow cylinder, said spring and said through hole of said cylindrical disk to be screwed by a nut tightly, said rim flange pressed against said first annular wall, said annular serrations engaging with said corresponding annular teeth, said protrusions inserted in said corresponding blind holes;each of said second and third round joints comprising a hollow inner disk, a hollow outer disk coupling with said hollow inner disk, and a round cover covering said hollow inner disk, said round cover having a rib disposed on an outer face of said round cover, at least a rim flange disposed on a rim of said round cover, and a threaded rod extending inward from a center of said round cover, said hollow inner disk having a peripheral outer wall, a hollow cylinder surrounded by a plurality of annular teeth toward said hollow outer disk, an annular groove defined between said peripheral outer wall and said hollow cylinder, a plurality of protrusions disposed on a face of said hollow cylinder toward said hollow outer disk, a center hole formed in a center of said hollow cylinder, first and second annular walls abutting an inner periphery of said peripheral outer wall toward said round cover, at least a tapered bevel edge formed on a top of said first annular wall, and an inner plate extending from said second annular wall toward said round cover, said first annular wall higher than said second annular wall, said hollow inner disk connecting an upper end of said second lower coupler, said hollow outer disk having a cylindrical disk disposed in said hollow outer disk, a plurality of blind holes disposed on a face of said hollow cylindrical disk toward said hollow inner disk, a through hole formed in a center of said cylindrical disk, a plurality of annular serrations disposed in said hollow outer disk toward said hollow inner disk, and an annular recess formed on an opening of said cylindrical disk, said hollow outer disk connecting a lower end of said second upper coupler, a spring inserted in said center hole of said hollow cylinder and said through hole of said cylindrical disk, said hollow outer disk coupling with said hollow inner disk, one end of said spring inserted in said annular recess, said threaded rod passing through said center hole of said hollow cylinder, said spring and said through hole of said cylindrical disk to be screwed by a nut tightly, said rim flange pressed against said first annular wall, said annular serrations engaging with said corresponding annular teeth, said protrusions inserted in said corresponding blind holes;Wherein said first and second wheels are folded adjacent to said third rod, each said round cover is rotated ninety degrees so that each said rim flange is turned along each said corresponding tapered bevel edge to each said corresponding second annular wall, then each said spring extends so that each of said corresponding annular serrations disengages from each of said corresponding annular teeth, each of said protrusions disengages from each of said corresponding blind holes, said second upper coupler is folded downward toward said second lower coupler, said first rod and said second rod are turned upside down, said first upper coupler is folded upward toward said first lower coupler, and said collapsible golf trolley is folded into a compact configuration.