Patent ID: 9473840
Filing Date: 2016-10-18
CPC Classification: H04R

Claim Text:
1. A dynamic headphone unit comprising: a diaphragm comprising a peripheral dome at an outer periphery; a voice coil fixed to the diaphragm, the voice coil comprising a lead line for transmitting signal current to the voice coil; a permanent magnet; a pole piece disposed adjacent one of the magnetic poles of the permanent magnet; and a yoke disposed adjacent the other magnetic pole of the permanent magnet, wherein the pole piece and the yoke define a magnetic gap therebetween, the voice coil is vibratably supported by the diaphragm in the magnetic gap, the lead line is urged against an inner surface of the peripheral dome of the diaphragm to be bonded to the inner surface with a pressure-sensitive adhesive, the lead line is bonded to the inner surface of the peripheral dome of the diaphragm with the pressure-sensitive adhesive, and the lead line is linearly bonded in a radially outward direction of the peripheral dome of the diaphragm.