| 摘要 |
PURPOSE:To offer a thin lens sliding mechanism that unsteadiness is hardly recognized. CONSTITUTION:Balls 9-a, 9-b and 9-c held by a retainer 7 are arranged between a lens barrel 8 and a lens frame 2 sliding in the lens barrel 8. Besides, the ball 9-a rolling in a V-shaped groove provided on the frame 2 is pressed to the inside by a leaf spring 11 through a ball presser 10. Then, smooth linear movement is obtained by engaging a detent pin 13 with a key groove 14 and regulating the turning of the lens frame 2. |
