Length-adjustable fan duct device

A fluid guiding device comprising:

• a fluid inlet portion;
• a fluid outlet portion;
• and
• a central portion fluidly communicated with the inlet portion and the outlet portion, the central portion comprising a pipe having a spring lever extended therefrom and a barrel defining a plurality of teeth thereon, an engaging tab and a handling tab perpendicularly extending from the spring lever in opposite directions, the engaging tab being selectively engaged with any one of the teeth to position the barrel to the pipe and being escapable from said any one of the teeth by pulling the handling tab to allow the barrel to be movable relative to the pipe.

A fan duct device for use in a computer enclosure defining a ventilating port, comprising:

• a ventilating pipe having an end portion adapted for attaching to the enclosure around the ventilating port and a tubular portion extending from the end portion and forming a cantilevered spring lever having an engaging tab thereon;
• a barrel slidably mounted on the ventilating pipe, having a jagged member thereon, the engaging tab being able to lock with the jagged member at a selected position of the jagged member so that a length of the barrel combined with the ventilating pipe is adjustable;
• and
• a holding frame adapted for holding a fan thereon, being fixed on the barrel so that the holding frame can move with the barrel.