Loudspeaker

Details Loudspeaker Loudspeaker

1997-10-07

2000-05-30

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

381403, H04R 2500

Patent

active

060699655

ABSTRACT:
The loudspeaker includes: a frame; a magnetic circuit portion; a diaphragm transmitting air vibration; a cylindrical voice coil bobbin connected to the diaphragm; a voice coil fixed to an outer peripheral portion of the voice coil bobbin; and a damper holding the voice coil in such a manner that the voice coil is capable of vibrating in a magnetic gap formed between an annular top plate and a center pole included in the magnetic circuit portion. The damper includes a flat portion which has a hole for passing the voice coil bobbin therethrough at its center, and a plurality of roll structures connected to a periphery of the flat portion and having a cross-section including a bent periphery. Each of the plurality of roll structures is fixed to the frame, and the hole of the flat portion is fixed to an outer peripheral surface of the voice coil bobbin.

REFERENCES:
patent: 1750009 (1930-03-01), Jensen
patent: 1944725 (1934-01-01), Tenny
patent: 2019878 (1935-11-01), Tolerton
patent: 2112473 (1938-03-01), Tolerton
patent: 4239944 (1980-12-01), Obara et al.
patent: 5511131 (1996-04-01), Kohara et al.
patent: 5619019 (1997-04-01), Yoshimura et al.
patent: 5790682 (1998-08-01), Hachiya et al.
K. Satoh et al., IEEE Transactions on Consumer Electronics, vol. 43, No. 3, pp. 972-979, 1997, "A High Fidelity Small-Sized Loudspeaker."

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