Patent attributes
A communication headset includes a housing having an upper cover defining a pivot hole and a locating hole. An earpiece and an ear hook are disposed on the top of the upper cover. A microphone arm has a raised portion received in the pivot hole. The bottom center of the raised portion defines an aperture. A locating cavity is defined at the bottom of the microphone arm. A pivot frame fixed in the housing defines a receiving can to accept a spring shaft, around which a spring winds for providing a torsion force to the microphone arm. An end of the spring shaft forms a locking portion fixed in the aperture. And a limiting body having a buckling block is mounted in the housing for limiting rotation of the microphone arm which is driven by the torsion force when the buckling block is forced to withdraw from the locating cavity.
