Patent ID: 9386376
Filing Date: 2016-07-05
CPC Classification: H04R,Y10T

Claim Text:
1. A speaker comprising: a magnetic circuit having a magnetic gap; a voice coil disposed in the magnetic gap; a diaphragm that vibrates together with the voice coil; a case in which the magnetic circuit, the voice coil, and the diaphragm are disposed; and a duct protruding from the case, the duct including a sound port that is a distal open end of the duct, the sound port facing and protruding into an acoustic space, wherein the case is disposed in an outer space that is separated from the acoustic space by a partition wall made of a metal, wherein the speaker is installed in such a way that the duct is inserted into a hole that is formed in the partition wall, wherein a heat dissipation port in which an end surface of the magnetic circuit facing the partition wall is exposed is formed in the case, and an elastically deformable thermal conductive sheet is inserted into the heat dissipation port so as to be sandwiched between the partition wall and the end surface of the magnetic circuit facing the partition wall when the speaker is attached to the partition wall; and wherein the acoustic space is a vehicle cabin, the outer space is a space within the vehicle that is outside of a vehicle cabin, and the partition wall is a wall of the vehicle cabin.