Rotation-controllable rotary grip assembly for luggage handle

A rotation-controllable rotary grip assembly, comprising:

• a shaft affixed to a retractable handle of a luggage, said shaft comprising a first end, a second end, and a locating means at the first end;
• a grip shaped like a barrel and rotatably sleeved onto said shaft, said grip comprising an axial hole axially extending through first and second ends thereof and coupled to said shaft for allowing rotation of said grip relative to said shaft, a locating means on the first end, and a recessed hole on the second end;
• a spiral torsion spring sleeved onto said shaft, said spiral torsion spring having a first pin extending from one end thereof and fastened to the locating means of said shaft and a second pin extending from an opposite end thereof and fastened to the locating means of said grip;
• and
• a lock for locking said grip to said shaft to prohibit rotary motion of said grip relative to said shaft, said lock comprising a latch mounted in said retractable handle of said luggage and movable between a locking position where said latch locks said grip to said shaft and an unlocking position wherein said latch unlocks said grip from said shaft for allowing rotation of said grip relative to said shaft, said latch comprising a base, a first top groove and a second top groove formed on a top side of said base, a finger strip extending from a bottom side of said base for operating by hand to move said latch between said locking position and said unlocking position, a latch pin extending from a front side of said base for engaging the recessed hole of said grip to lock said grip to said shaft, a positioning member selectively positioning in one of said first top groove and said second top groove, and a spring member pressed on said positioning member to hold said positioning member in one of said first top groove and said second top groove.