| 摘要 |
PURPOSE: A universal joint is provided to have a small number of components, make a manufacture assembly easy, have cheap cost and light weight and smoothly flow without lubricating oil. CONSTITUTION: The universal joint is composed of:a holder unit(24) that installs a guide groove(25); a ball member(6) that fits the inner face of the holder unit; and a rotator(4) that is rotated along the guide groove of the holder unit. Herein the holder unit makes the ball member fitted inside the holder unit by fitting an elastic ring(7) after forming a ring-rimmed groove on the inner circumference.
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