| 摘要 |
PROBLEM TO BE SOLVED: To obtain a tubular mechanism eliminating necessity for a separate connection means like a clamp, and having a very simply operated connection means. SOLUTION: A handle 3 of a mop is constituted by a large diametric pipe 6 and a bar-shaped member 7 inserting one end in this pipe. An engaging groove 6A is formed in an internal peripheral surface of the large diametric pipe 6, while an engaging protrusion 11A is formed in the external peripheral part of an engaging member 11 serving as one end of the bar-shaped member 7. In a condition that as shown in the drawing an engaging surface 11b of the engaging protrusion 11A is engaged with a bottom part 6b of the engaging groove 6A, the large diametric pipe 6 and the bar- shaped member 7 are integrally connected, can not be relatively moved in an axial direction. On the other hand, when the bar-shaped member 7 is relatively rotated in the clockwise direction from this connection condition relating to the large diametric pipe 6, the engaging groove 6A and the engaging protrusion 11A are easily separated. In this condition, the large diametric pipe 6 and the bar-shaped member 7 can be relatively moved in the axial direction. In this way, the handle 3 decreasing a number of part items as compared with in the past further with a simple structure can be provided.
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