Patent ID: 8311258

Claim:
A headset, comprising: a housing having a first wall with at least one sound hole formed thereon; a loudspeaker unit disposed in the housing and adjacent to the sound hole; a blocking component mounted in the housing and capable of slidably moving towards and backwards the first wall to form an adjunctive chamber therebetween; and an adjustive component rotatably mounted to the housing, the adjustive component connected with the blocking component in a way of screw link in order to drive the blocking component moving towards and backwards the first wall when the adjustive component is driven to rotate, wherein the adjustive component has a main body having a column shape, and comprising a thread groove and a protruding portion, the thread groove engaging with a corresponding thread ridge formed at a surface of a connecting hole defined at a substantial middle portion of the blocking component, an adjustive switch being disposed outside the housing and connected with an end of the main body away from the thread groove, the protruding portion enclosing the main body and located adjacent to the adjustive switch, a stopping portion formed on an inner surface of the housing, and extending inwards and bending towards the main body to surround the protruding portion.