Joint structure null of extended tube for electric cleaning machine

摘要

PROBLEM TO BE SOLVED: To obtain a structure with which the fitting part of an extension pipe for electric cleaner is hardly fall-off. ;SOLUTION: At least one part on the outer peripheral surface of the terminal part of an extension pipe 2, an expanded part 10e is formed to be expanded outside by fitting an opposite side pipe 3 to be connected onto the inner peripheral surface of the extension pipe 2. The opposite side pipe 3 to be connected with the terminal part of the extension pipe 2 is formed in the structure of partially duplex pipe having a top end part 3a to be fitted onto the inner peripheral surface of the terminal part of the extension pipe 2 and a sleeve part 11, into which the extension pipe 2 is fitted, rising from the outer peripheral surface of the pipe, and on the inner peripheral surface of the sleeve part 11, a projecting part 11a is formed to be engaged with the expanded part 10e. Thus, when the extension pipe 2 is inserted into the sleeve part 11 of the opposite side pipe 3 in duplex structure, the expanded part 10e formed on the outer peripheral surface of the extension pipe 2 engaged with the projecting part 11a, which is formed on the inner peripheral surface of the sleeve part 11 of the opposite side pipe 3, and hardly detached from the opposite side pipe 3.;COPYRIGHT: (C)1997,JPO