Patent ID: 8325962

Claim:
Headphones comprising: a pair of left and right earcups; an audio signal processing unit contained in each of the earcups; a headband connecting the left and right earcups respectively through a hanger; a first cord having a first end and a second end, wherein the first end is configured to be connected to an external input terminal and the second end is connected to one of the audio signal processing units; a second cord connected to each audio signal processing unit and extending through the headband, wherein the second cord has a multi-conductor structure including at least four signal wires, such that the second cord has a multi-layer structure with an external coating partitioned into a plurality of parts in a direction intersecting with an axis line direction, each part including a plurality of signal wires; a connection portion between the hanger and the headband configured as an extension and contraction unit having a multistage structure including a small-diameter hollow member able to be taken in and out of a large-diameter hollow member, wherein a portion of the second cord is contained in the extension and contraction unit and is spirally wound so as to be extended and contracted, and wherein nodes are placed respectively between the headband and the extension and contraction unit and between the hanger and the extension and contraction unit, each of the respective nodes having a through-hole allowing penetration of the second cord.