| 摘要 |
A dual quantity flushing valve mechanism comprising a housing having a base fitting for attachment to a water outlet of a toilet cistern, an overflow tube axially displaceable within the housing and having a bottom portion extending substantially coaxial within the housing, a top portion parallel to the bottom portion and extending outside of the housing, and an intermediate, inclined portion extending between the top portion and the bottom and projecting through the housing, with a seal disc fitted at a bottom of the bottom portion for sealing engagement of the water outlet. The mechanism further comprising an internal float coaxial over the bottom portion of the overflow tube, has an axial displacement restrictor articulated thereto and an external float fixed to the overflow tube, an operating mechanism fitted within the housing, for axial displacement of the overflow tube, however with selective axial displacement of the internal float responsive to a operating a long flush actuator or a short flush actuator, articulated with said operating mechanism.
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