| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening/closing mechanism for a valve, in which while suppressing a stroke of an operating part small, the valve can be opened/closed with a small operational force.SOLUTION: An opening/closing mechanism 22 for opening/closing a valve through a pushing operation includes: an opening/closing mechanism body 8a; a valving element 24 which is disposed movable in a first direction and moved between a valve opening position, where a valve seat 26 is opened, and a valve closing position; a control stick 30 which is movably arranged in a second direction substantially perpendicular to the first direction, acts an operational force on the valving element based on the pushing operation and moves the valving element in the first direction; and a moving direction converting means which converts the movement of the control stick 30 in the second direction into the movement of the valving element 24 in the first direction. The moving direction converting means is configured to make a moving amount of the valving element 24 in the first direction, with respect to a moving amount of the control stick 30 in the second direction, small at the valve closing position and to make it large at a position where the valving element 24 is moved from the valve closing position for a predetermined distance. |
