| 摘要 |
PURPOSE:To prevent the axial fluctuation of male threads and female threads from occurring by containing springs for obliquely pressurizing through a plurality of balls to the balls and the threads of a shaft in a guide secured to a rotor. CONSTITUTION:A plurality of balls 13 and springs 14 are contained in a guide 12. The pressurizing forces of the springs 14 are obliquely pressed through a slider 15 and the balls 13 to the axis of male threads 1a of a shaft 1. With the construction, the guide 12 is secured to a support 9 to rotate simultaneously upon rotation of the support 9. The pressure of the spring 14 is applied through the slider 15 and the balls 13 to the male threads 1a of the shaft 1 to prevent the axial fluctuations of the male threads 1a and the female threads 9a.
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