Electromagnetic driving unit for a loudspeaker assembly

Details Electromagnetic driving unit for a loudspeaker assembly Electromagnetic driving unit for a loudspeaker assembly

2007-07-10

2007-07-10

Le, Huyen (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S414000, C381S421000

Reexamination Certificate

active

10511975

ABSTRACT:
An electromagnetic driving unit includes a magnet part and a coil part that is translatable along a translation axis with respect to the magnet part. A diaphragm extends from the coil part in a substantially radial direction with respect to the translation axis of the coil part. The magnet part includes two permanent magnets and an intermediate magnetic pole element that is sandwiched between the permanent magnets when viewed along the translation axis of the coil part. In order to improve the efficiency of the driving unit, the permanent magnets and the intermediate magnetic pole element are sandwiched between two external magnetic pole elements, and all pole elements have pole faces that are magnetically directed towards the coil part.

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