| 摘要 |
PURPOSE: To decide the length of a stroke operation brace by securing a grasping position by means of the engagement of the groove of a grasping collar with the teeth of an adjusting collar and gliding the grasping collar with the interference of the teeth of the adjusting collar and the teeth of a screw collar restrictively. CONSTITUTION: The grasping collar 21 is arranged on the external surface of the tube-shaped adjusting collar 6 having an external screw part 7 and in internal screw part 8 so as to be glidable and also the adjusting collar is made turnable by the grasping collar. When correct length is secured, the teeth 19 of a rotary star-shape 18 are guided to a core alligning position for the teeth 17 of the screw collar 15 and, after that, the grasping collar 21 is made to the slide with the teeth 19 or/and the teeth 17 by the groove 24 so as to be moved to a restricting position. The adjusting collar 6 and the screw collar 15 are kept in a mutually retaining state with the grasping collar 21, and the fluctuation of length does not occur. |
