| 摘要 |
A suction hose coupling for a vacuum cleaner comprises a flexible hose 40 connectable at one end to a vacuum cleaner, and rotatably connectable at the other end to a suction pipe 50. The connection comprises at least one connection protrusion 61 on the end of either the flexible hose or the suction pipe and at least one corresponding connection groove 62 on the end of either the flexible hose or the suction pipe to receive said connection protrusion. At least one guide protrusion 64a, 64b is provided on either the flexible hose or the suction pipe, adjacent said at least one connection protrusion, to reduce the surface contact between the flexible hose and the suction pipe. The connection protrusions and grooves, and the guide protrusion, may be disposed circumferentially around the diameter of the flexible hose and suction pipe. Preferably two connection protrusions and corresponding grooves are provided, and the guide protrusion is disposed between them. Preferably two guide protrusions are provided, one on the surface of the flexible hose and one on the surface of the suction pipe.
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