Patent ID: 7438491

Claim:
A structure for multi-directional connectors, comprising: a connecting unit, further comprising a ball-shaped connecting element at one end; an encasing unit, further comprising a plurality of holding plates forming a ball-shaped concave for seating said connecting element of said connecting unit, said holding plates having an outer surface formed with screw teeth; and a ring-shaped fastening unit, having inner wall formed with screw teeth for engaging with said screw teeth on the outer surface of said holding plates; wherein said connecting element is made of an inner core layer and an outer covering layer which is softer and larger than said inner core layer, said inner core layer being a ball-shaped shell with a hollow center and an outer surface comprising a plurality of vertical first trenches each having at least a hole penetrating to said hollow center of said inner core layer, and wherein said outer covering layer being connected to said inner core layer through each said hole.