Patent ID: 8172932
Filing Date: 2012-05-08
Classification: A47L,Y10S

Abstract:
1. A connecting tube having a dust sensing function for use in a vacuum cleaner, comprising: a tube element having a first air flowing passage therein to move suction air laden with dust or dirt; a body connected to the tube element and having a second air flowing passage to communicate with the first air flowing passage; a detecting sensor disposed in the second air flowing passage of the body to detect whether the dust or dirt passes through the second air flowing passage; a lamp part to operate according to a signal outputted from the detecting sensor; a rotating part rotatably disposed in the body; a rotation driving-passage part disposed in the body to draw in an external air into the second air flowing passage from the outside by means of an air suction force in the second air flowing passage of the body and thus to rotate the rotating part; an electric generator connected to the rotating part to rotate by the rotating part thus to generate an electric power for operating the detecting sensor and the lamp part; a muffler part disposed in the body to reduce noises generating in rotating of the rotating part and in flowing of air in the second air flowing passage; and a cover part to wrap an area of the body on which the detecting sensor, the lamp part, the rotation driving-passage part, the electric generator, and the muffler part are installed, wherein the muffler part comprises: a plurality of resonating holes formed in the body adjacent to the second air flowing passage; and a sponge filled in a space between the cover part and the body on the plurality of resonating holes.