US 2006/0078151 A1 · Loudspeaker having cooling system

Abstract

A loudspeaker has a cooling system in which a pole portion has a shorting ring made of non-magnetic conductive material that stabilizes magnetic field to reduce distortion of sound and a heat dissipation plate that couples to the shorting ring to facilitate efficient dissipation of heat. The heat generated by a voice coil of the loudspeaker is transmitted to the shorting ring and is conducted to the heat dissipation plate which acts as a heat sink to allow the heat dissipation. A multiplicity of shorting rings may be provided to further reduce impedance modulation, each of which is coupled to the heat plate. The heat dissipation plate has a gap in an axial direction of the loudspeaker to prevent an electric current in the shorting ring from flowing through the heat dissipation plate.

Claims20

Dependent claims

A loudspeaker, comprising:

a speaker frame;
a diaphragm connected to the speaker frame in a manner capable of vibration;
a voice coil connected to the diaphragm for vibrating the diaphragm;
a magnetic assembly including a permanent magnet for creating a magnetic circuit for interaction with the voice coil;
a pole piece disposed at a central opening of the magnetic assembly to form an air gap in the magnetic circuit with the magnetic assembly into which the voice coil is movably provided;
a shorting ring mounted on an outer surface of the pole piece;
and
a heat dissipation plate mounted on the pole piece at an inner opening thereof and connected to the shorting ring.

5 more elements

Dependencies are inferred from the claim text.

Loudspeaker having cooling system

Life of this patent

Loudspeaker having cooling system

Life of this patent

Abstract

Claims20