Patent ID: 8594359

Claim:
An earphone comprising: a speaker unit having a sound emitting surface through which a sound is emitted and a rear surface, on both sides of the speaker unit; a bushing through which a cord that carries an audio signal to the speaker unit runs to the outside of the earphone; and a housing having a first housing member, a second housing member, and a third housing member that are combined with each other to constitute the housing, wherein the housing covers the speaker unit and covers a portion of the bushing, wherein a back cavity is provided between the rear surface of the speaker unit and the portion of the bushing, the back cavity being surrounded by inner surfaces of the first, second, and third housing members, such that the portion of the bushing extends into the housing so that the portion of the bushing covers a border line between the first and second housing members, and a border line between the second and third housing members.