| 摘要 |
A handle for a mop or other such cleaning instrument is hollow for flow of water from a hose attached to one end of the handle to the work-engaging portion at the other end. A manually operable control moves a stopper between three positions wherein flow through an opening in an internal partition in the handle is fully blocked, partially blocked or fully unblocked. The stopper has a total of three detent members in the form of rounded protrusions and a total of three recess for receiving the detents are formed in the partition. As the operating member is manipulated to move the stopper between its three positions, one detent engages a recess in the fully blocked position, two detents engage respective recesses in the partially blocked position and all three detents engage the three recesses in the fully unblocking position. The provision of three detents and three recesses adds to the stability and reliability of operation of the implement.
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