| 摘要 |
<p>PURPOSE:To shift a rotational movement to a linear movement in a condition that a sliding member is held in an elastic manner, by bringing the sliding member into a linear movement by dint of tensile forces of two elastic members corresponding to gears engaging each other. CONSTITUTION:Tensile forces F1 and F2 of springs are exerted on a pin 23 of a sliding plate 22. The tensile force F1 is exerted in the direction of an arrow mark B, the tensile force F2 in the direction of an arrow mark A or in a reverse direction to that of the tensile force F1, and F1 is larger than F2. Thus, the sliding plate 22 is brought into a stabilized state in which it is energized in the direction of the arrow mark B. When gears 9 and 10 spin in directions of arrow marks D and E by an angle beta (=90 deg.), tensile forces F5 and F6 are exerted on the pin 23 of the sliding plate 22. The sliding plate 22 moves in the direction of the arrow mark A to a position where the tensile force F5 is balanced with the tensile force F6. Thus, the sliding plate 22 is brought into a stabilized state. The state is a dead point in that, when a force is exerted from the exterior, the sliding plate 22 commits a toggle motion in the direction (the direction of the arrow mark A or B) of the force exerted thereon.</p> |
