Actuating device on the drain valve of a flush tank

An actuating device for a drain valve of a flush tank, comprising:

• a flush tank base defining a drain valve seat;
• a flush tank lid disposed above said base;
• a float housing positioned above said drain valve seat, between said flush tank base and said flush tank lid;
• a valve body moveable between a rest position, wherein said valve body is seated in said drain valve seat, and an upper position wherein said valve body is spaced from said drain valve seat, said valve body being mounted in said float housing;
• switching means mounted on said float housing and forming a single unit with said float housing, and fastened for movement of said valve body between said rest position and said upper position, said switching means including a lever and a trigger, said lever being pivotable in a first direction for raising said valve body to move said valve body between said rest position and said upper position, and pivotable in a second direction, lowering said valve body for moving said valve body between said upper position and said rest position, said lever being positioned within said float housing, said trigger being moveable axially downwardly to engage said lever to pivot said lever in said first direction when said valve body is in said rest position, and being movable downwardly to engage said lever to move said lever in said second direction when said valve body is in said upper position, for switching a direction of movement of said valve body upon downward movement of said trigger, depending upon a position of said valve body, said trigger being axially movably supported by said float housing;
• and release knob means for moving said trigger downwardly, said release knob means including a release knob movably connected to said flush tank lid and being vertically moveable from outside of said flush tank, and a downwardly extending part being cut to a desired length to abut an upper surface of said trigger thereby imparting downward movement between said flush knob and said trigger without fixedly connecting said downwardly extending part and said trigger.