Assembly for a vacuum cleaner having a sound-absorbing system

An assembly for a vacuum cleaner having a sound-absorbing system comprising:

• a body including a suction opening in order for the air entraining dirt in an area to be cleaned to be sucked into the cleaner, and a suction space formed in the body adjacent to the suction opening;
• a neck including a relatively large-diameter section, said large-diameter section having a front part, said front part inserted in the body, a shoulder connected to a rear end of the large-diameter section, a cylindrical relatively small-diameter section connected to the shoulder and having a diameter smaller than that of the large-diameter section, a PVA, polyvinyl alcohol, sponge located within the large-diameter section and having a predetermined thickness so that said PVA sponge has a first cylindrical path formed therein which is interconnected with said suction space, and a stopper having a front section engaged with said PVA sponge and a rear section engaged with an outer surface of said large-diameter section, the thickness of said PVA sponge being not less than the difference between radiuses of said large-diameter section and said small-diameter section of the neck, so that said first cylindrical path has a diameter not greater than the diameter of said small-diameter section of the neck, said PVA sponge having an inner corner rounded off so as to have a predetermined curvature, and said front section of said stopper covering an outer peripheral part of a front end surface of said PVA sponge;
• and
• a connector pipe including an expansion-pipe section and a remaining-pipe section, said expansion pipe section is bent with respect to the remaining-pipe section with a predetermined angle, and the diameter of said expansion-pipe section is enlarged compared with the remaining-pipe section, the small-diameter section of the neck is locatable in the expansion-pipe section, and said connector pipe having a second cylindrical path formed therein, which is interconnected to the first cylindrical path of the neck.