(19)
(11) EP 1 118 304 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.01.2003 Bulletin 2003/04

(43) Date of publication A2:
25.07.2001 Bulletin 2001/30

(21) Application number: 00110913.1

(22) Date of filing: 24.05.2000
(51) International Patent Classification (IPC)7: A47L 9/24
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 18.01.2000 CN 00216255

(71) Applicant: Yu, Jinxing
Suzhou, Jiangsu 215005 (CN)

(72) Inventor:
  • Yu, Jinxing
    Suzhou, Jiangsu 215005 (CN)

(74) Representative: Altenburg, Udo, Dipl.-Phys. et al
Patent- und Rechtsanwälte Bardehle - Pagenberg - Dost - Altenburg - Geissler - Isenbruck, Galileiplatz 1
81679 München
81679 München (DE)

   


(54) Stepless telescopic dust collecting tube for vacuum cleaner


(57) A stepless telescopic dust collecting tube of vacuum cleaner comprises an exterior tube (4), an interior tube (1) inserted into the chamber of exterior tube (4) and a locking device for positioning between the said exterior tube (4) and interior tube (1), wherein said locking device includes a conical tube section (5) in said interior tube 1 and a locking ring with gap fit round against the conical tube section (5). Said locking ring (7) mates with said interior tube section (5) through the internal screw thread (6) on the inner surface and the external screw thread (6') on the outer surface respectively. Said exterior tube (4) is provided with axial guiding configuration (11) on internal tube wall, and said locking ring (7) is provided with corresponding axial guiding configuration (11') so that the axial guiding configuration 11 can slide within it . The dust collecting tube can be locked at any position, and operation is reliable and simple.






Search report