Patent ID: 8090135

Claim:
A communication headset comprising: a housing, including a shell and an upper cover coupled on the top of the shell, the shell defining a gap on a sidewall thereof, the upper cover defining a pivot hole and a locating hole passing therethrough; an earpiece, disposed on the top of the upper cover; an ear hook, rotating around the earpiece, disposed on the top of the upper cover; a microphone arm, having a base portion and an extension portion, the bottom of the base portion defining a raised portion received in the pivot hole of the upper cover, the bottom center of the raised portion defining an aperture, a locating cavity defined at the bottom of the microphone arm; a pivot frame, having a tray-shaped portion fixed in the housing, the center of the tray-shaped portion defining a receiving can; a spring shaft, accepted in the receiving can of the pivot frame, an end of the spring shaft protruding to form a locking portion fixed in the aperture of the microphone arm; a spring, winding around the spring shaft for providing a torsion force to the microphone arm; and a limiting body, having a buckling block and a pressing portion, mounted in the housing for limiting rotation of the microphone arm which is driven by the torsion force when the pressing portion is pushed and therefore the buckling block is withdrawn from the locating cavity.