Telescopic dust-collecting pipe for vacuum cleaner

A telescopic dust collecting pipe for a vacuum cleaner comprises an outer pipe, an inner pipe inserted in the outer pipe, and a locking mechanism for locking the relative position of the inner pipe and outer pipe, wherein an oriented groove is arranged on the outer surface of said inner pipe axially at intervals;

• a controlling rod is arranged on the outer wall of the inner pipe slidingly and a part of the control rod is located between the outer and inner pipes, an oriented groove corresponding to the oriented groove on the inner pipe at intervals is arranged on the controlling rod to form an outer layer oriented groove and an inner layer oriented groove, wherein the oriented groove on inner pipe forms inner layer oriented groove, the oriented groove on controlling rod forms outer layer oriented groove;
• relative movement between the controlling rod and the inner pipe brings the outer layer oriented groove to coincide or stagger with the inner layer oriented groove;
• between the outer pipe and the inner pipe a locking element moved along radial direction is arranged;
• the locking element is pressed against one side of the inner pipe by an elastic element;
• when two layer oriented grooves are coincided, the locking element is pressed into the grooves coincided, and both the outer and inner pipes are locked relatively;
• when two layer oriented grooves are staggered, the locking element is pushed out of the oriented groove, and the locking state of the outer and inner pipes is released.

A telescopic dust collecting pipe for a vacuum cleaner comprises an outer pipe, an inner pipe inserted in the outer pipe, and a locking mechanism for locking the relative position of the inner pipe and outer pipe, wherein an oriented groove is arranged on the outer surface of said inner pipe axially at intervals;

• a controlling rod is arranged in the inner pipe slidingly, an oriented groove corresponding to the oriented groove on the inner pipe at intervals is arranged on the controlling rod to form an outer layer oriented groove and an inner layer oriented groove;
• relative movement between the controlling rod and the inner pipe brings the outer layer oriented groove to coincide or stagger with the inner layer oriented groove;
• between the outer pipe and the inner pipe a locking element moved along radial direction is arranged, said locking element and said outer layer oriented groove being sized and shaped to be laterally moveable with respect to each other;
• the locking element is pressed against one side of the inner pipe by an elastic element;
• when two layer oriented grooves are coincided, the locking element is pressed into the grooves coincided, and both the outer and inner pipes are locked relatively;
• when two layer oriented grooves are staggered, the locking element is pushed out of the oriented groove, and the locking state of the outer and inner pipes is released.