Patent ID: 8275166

Claim:
A headphone comprising: a first earpiece having a first casing and a first ear plug disposed at an end of the first casing; and a second earpiece having a second casing and a second ear plug disposed at an end of the second casing; wherein the first casing has a clasping portion at an end opposite to the first ear plug, the second casing has a clasping recess at an end opposite to the second ear plug for receiving the clasping portion, the clasping portion engages with the clasping recess for assembling the first casing and the second casing together into a single piece, and wherein an annular rib is formed on an outer wall of the clasping portion, at least one rib is formed on and circularly arranged along an inner wall of the clasping recess, for receiving the annular rib between a recess end of the clasping recess and the ribs.