Loudspeaker

Details Loudspeaker Loudspeaker

2006-03-28

2006-03-28

Tran, Sinh (Department: 2646)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S419000, C381S420000, C381S399000

Reexamination Certificate

active

07020301

ABSTRACT:
A loudspeaker comprising at least one magnet27, a yoke24fixed to a bottom surface of the magnet, a flat plate26fixed on an upper surface of the magnet, a magnetic circuit29having a magnetic gap28formed between the plate and the yoke, and a flat diaphragm23provided with a coil21disposed above the magnetic gap. The magnet has a width greater than that of the plate, and at least a part of the upper surface of the magnet is exposed so that it directly faces the diaphragm. According to the structure of the present invention, a larger volume magnet can be used without increasing the size of the magnetic circuit. Furthermore, as magnetic flux can be concentrated in an upper region of the magnetic gap, the magnetic circuit becomes efficient and compact. Thus a compact and high-efficiency loudspeaker for high frequency sound reproduction can be provided.

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