| 摘要 |
Disclosed is a joint (400) comprising first inner part (100) and a second inner part (100), a middle part (200), a first outer part (300) and a second outer part (300). The first and second inner parts each comprises a semi-spherical ball (110) with a through hole (130) connected to a non-circular tap (160). The ball has four recesses (140) thereon for attachment of wires and for enabling movement of the inner part inside the middle part. The middle part (200) comprises two opposing half-spheres (210), with a cylindrical portion (220) between them for fitting of the wires. The half-spheres (210) are adapted to accommodate the first and second inner part (100) respectively. The first and second outer parts (300) each comprises a semi-sphere (310) connected to a hollow tap (330), and the semi- sphere (330) is adapted to encompass one side of the middle part (200) and one of the inner parts (100). The first and second outer parts (300) each further comprises four brackets (320) for attachment of ligaments (410). |
