Tool handle mounting structure for garden tools

A tool handle mounting structure for attaching a handle to a tool head comprising:

• a coupling cap having a mounting section at one end fixed to said tool head and a coupling section at an opposite end adapted for coupling to a handle, said mounting section having a stepped periphery with the steps increasing in diameter in a direction toward said coupling section, said coupling section having an external spiral groove around the periphery;
• a tubular front end on said handle adapted for coupling to the coupling section of said coupling cap, said tubular front end having a plurality of threads raised from an inside surface adapted for threading onto the spiral groove of the coupling section;
• a longitudinal locating groove on a largest step of said mounting section;
• a sleeve fixedly mounted to the tubular front end of said handle, said sleeve having a longitudinal track on an outside with a longitudinal sliding slot in said longitudinal track, said longitudinal sliding slot being longitudinally aligned with the longitudinal locating groove of said coupling cap when said handle is coupled to said coupling cap;
• and,
• a sliding lock movably mounted in the longitudinal sliding slot, so as to be movable toward and away from the locating groove of said coupling cap, such that said sliding lock is movable into the locating groove of said coupling cap to prohibit rotary motion of said sleeve and said handle relative to said coupling cap and said tool head, and movable out of the locating groove of said coupling cap to enable said sleeve and said handle to be rotated relative to said coupling cap and said tool head.