Title:
LOUDSPEAKER
Document Type and Number:
WIPO Patent Application WO/1999/031931
Kind Code:
A1
Abstract:
This invention relates to a loudspeaker. One or more than one pair of repulsive magnets are mounted on both sides of a flat, another respective flat is mounted across the polar plane of said magnet, thereby three or more magnet gaps are formed between the surfaces of said three or more flats and the surfaces of coaxially installed ring-shaped magnet bodies. A voice coil is inserted in said magnet gaps, the winding direction of the voice coil and direction of a current which flows through the voice coil are prescribed to make said voice coil produce electromotive force with same direction at the same work instant. When said loudspeaker has a pair of repulsive magnets whose magnet characteristic is fully symmetric and repulsive magnet circuits, by setting the number of turns, inductance, and connection way of the voice coil, said loudspeaker has a pure resistance load characteristic.
Inventors:
ZHANG FAN (CN)
Application Number:
PCT/CN1998/000306
Publication Date:
June 24, 1999
Filing Date:
December 11, 1998
Export Citation:
Assignee:
ZHANG FAN (CN)
International Classes:
H04R9/02; H04R9/06; H04R9/04; (IPC1-7): H04R9/06
Domestic Patent References:
| WO1992009180A1 | 1992-05-29 | |||
| WO1994003026A1 | 1994-02-03 |
Foreign References:
| JPH06233383A | 1994-08-19 |
Attorney, Agent or Firm:
CHINA SINDA INTELLECTUAL PROPERTY LIMITED (China Garment Mansion Suite 1300 No. 99
Jianguo Road Chaoyang District Beijing 0, CN)
Download PDF: