| 摘要 |
The invention provides a means for engaging and disengaging the cleaning and adhesive rollers 20, 22 provided within surface cleaning apparatus with a drive means 24. The respective rollers 20, 22 are mounted within slidable cartridges such that drive and pinion gear wheels 24, 26 provided on a base unit of the apparatus and the cleaning roller 20 respectively can be moved into and out of engagement with each other. A cam member 30 is mounted on the axle 28 of the cleaning roller 20 and is provided with frustoconical surfaces 32, 34. During insertion/removal of the cleaning roller 20 into/from the base unit, the cam member 30 engages the upstanding member 36 such that the distal end of the axle 28 is forced upwards. This vertical direction component ensures that the gear teeth of the gear wheels 24, 26 engage/disengage in a radial direction. Accordingly, the gear wheels (24, 26) do not collide as they move laterally towards each other.
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