Third wheel collapsing device for a golf club cart

A third wheel collapsing device for a golf club cart comprising a third wheel support frame, said third wheel support frame comprising:

• a U-shaped frame having its open end pivotally assembled with a third wheel, said U-shaped frame having its closed end extending outward and forming a hollow support arm, said support arm at least bored with a first and a second insert hole
• a fit block fitted in said hollow support arm, said fit block bored transversely with a first and a second connecting hole, said two connecting holes of said fit block respectively matching with said two insert holes of said support arm
• a support base assembled on said support arm, said support base having a pivotal shaft secured under the bottom, said pivotal shaft inserted downward through both said second insert hole of said support arm and said second connecting hole of said fit block, said pivotal shaft locked in position under said support arm by fasteners, said support base pivotally fixed on said support arm and able to rotate thereon, said support base provided with an elastic lock member in front of said pivotal shaft, said elastic lock member having an engage rod always pushed downward by a spring, said engage rod having its lower end inserted in both said first insert hole of said support arm and said first connecting hole of said fit block, said engage rod having its upper end extending out of said support base to be controlled by a user, said support base having its rear end fixed with a fastening frame extending backward and upward, said fastening frame fixedly assembled on the lower end of the main frame of a golf club cart
• said engage rod pulled upward and removed out of said first insert hole of said support arm and said first connecting hole of said fit block for collapsing said third wheel of said golf club cart, the handle of said golf club cart pressed downward slightly to let said third wheel separate from the supporting surface of the cart, said third wheel support frame being turned transversely to collapse said third wheel of said golf club cart.