| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the operability of a rigidity adjusting means by preventing the softening of a soft part against the operator's will during the operation to harden the soft part. SOLUTION: A cam ring 46 has a cam groove 47 for guiding a moving pin 45 which moves to activate the rigidity adjusting means for adjusting the hardness of the soft part. When the cam ring 46 is, thereupon, turned, for example, counterclockwise (downward) by operating force, the moving pin 45 is guided by the cam groove 47 and is moved toward a rear end side (clockwise) and the rigidity adjusting means interlocked to the moving pin 45 changes the rigidity of the soft part, for example, hardens the part. The traveling angle of the cam groove 47 comprises only the anglesα,γwhich are right uphill on the plane of Fig. where the soft part is hardened and an angleβof a longitudinal direction where the specified rigidity is held. The cam groove 47 is thus formed in a manner as to avoid the mingling of the traveling angles at which the rigidity of the soft part softnes.</p> |
