| 摘要 |
PROBLEM TO BE SOLVED: To prevent the rotating center of a ball part provided to the rotating shaft from moving with an inexpensive structure. SOLUTION: The universal joint comprises a rotating shaft 21 having a ball section 22 on one end and a pair of shaft sections 24, 25 formed in line with the ball section 22 and a rotary body 26 having guide grooves 28, 28 in which the two shaft sections of the rotary shaft are inserted and a retainer hole 27 for retaining the ball section. The ball section is free to rotate around the axis of the shaft sections, and the shaft sections can be inclined along the guide grooves to allow free rotation of the universal joint. Recesses 30, 30 are formed in the retainer hole to prevent the ball section from coming out. COPYRIGHT: (C)2007,JPO&INPIT
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