| 摘要 |
A dental cleaning appliance, such as an electric toothbrush with an extendable rinse nozzle 36 for delivering bursts of working fluid such as water to the teeth of a user, has a cleaning tool 14 detachably connected to a handle 12. The cleaning tool 14 includes a stem 26, which extends between the handle 12 and the nozzle 36, and a fluid reservoir 34 for storing working fluid and which is connected to and extends around the stem 26. The reservoir 34 may be refillable through a port 122 and have a transparent external wall 132 and an inner wall such as a tubular diaphragm or bladder which is movable relative to the external wall to vary the volume of the reservoir and an associated expansion chamber. A collar 124, which may form part of the external wall 132, is rotatable relative to the stem 26 and handle 12 between a first position in which the fluid port 122 is exposed by a recessed portion 126 of the handle for refilling, and a second position in which the reservoir fluid port 122 is in fluid communication with handle fluid inlet 104. |
