| 摘要 |
The present invention provides a suction tube for a vacuum cleaner, which comprises an outer pipe ( 8 ), an inner pipe ( 1 ) received in the outer pipe, and a locking device ( 20 ) disposed between the inner pipe ( 1 ) and the outer pipe ( 8 ). A guiding bush ( 2 ) is provided at the inner wall of the outer pipe ( 8 ). The inner pipe ( 1 ) is provided with a row of detent holes ( 9 ) which are arranged in the axial direction of the inner pipe ( 1 ). An inner liner tube ( 12 ) is fixed onto the inner wall of the inner pipe ( 1 ). Thus, the manufacturing of the detent recesses becomes easier since the detent holes are made through the inner wall of the inner pipe, and the air leakage of the inner pipe due to the detent holes can be prevented by the inner liner tube ( 12 ) provided at the inner pipe ( 1 ).
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