Patent ID: 8913773
Filing Date: 2014-12-16
Classification: H04R

Abstract:
1. An earphone comprising: a housing having a driver unit; a voice coil in the driver unit; a diaphragm, a portion of which is fixed to the voice coil; and a sound guide tube mounted on a front surface of the housing to protrude from the front surface and terminating in a sound guide tube tip, wherein directly behind the front surface is a porous structure, the porous structure is a porous protection plate, and directly behind the porous protection plate is the driver unit, and wherein the sound guide tube is tilted away from and relative to a center line of the driver unit by a predetermined angle, such that a line of sight exists, looking through the sound guide tube, between the sound guide tube tip and a portion of the voice coil, and the line of sight between the sound guide tube tip and the portion of the voice coil goes through the porous protection plate.