Patent Number: 8,718,317

Title: Moving-magnet electromagnetic device with planar coil

Abstract: An electromagnetic device includes a housing, a planar coil disposed inside the housing, and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, and wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.

Inventors: Wu; Zonghan (Nanjing, CN)

Assignee:

International Classification: H04R 1/00 (20060101); H04R 7/00 (20060101); G10K 13/00 (20060101); G10K 7/00 (20060101); H05K 5/00 (20060101); H04R 11/02 (20060101); H04R 9/06 (20060101)

Expiration Date: 5/06/12018