Invention Grant
- Patent Title: Multi-way coaxial loudspeaker with internal magnet motor and permanent magnet cylinder
- Patent Title (中): 带内置电机和永久磁铁的多路同轴扬声器
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Application No.: US13910151Application Date: 2013-06-05
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Publication No.: US09100733B2Publication Date: 2015-08-04
- Inventor: Zhijun Zhao
- Applicant: HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED
- Applicant Address: US CT Stamford
- Assignee: HARMAN INTERNATIONAL INDUSTRIES, INC.
- Current Assignee: HARMAN INTERNATIONAL INDUSTRIES, INC.
- Current Assignee Address: US CT Stamford
- Agency: Brooks Kushman P.C.
- Main IPC: H04R1/00
- IPC: H04R1/00 ; H04R9/06 ; H04R11/02 ; H04R1/24 ; H04R9/02

Abstract:
A loudspeaker includes a woofer having a first permanent magnet disposed substantially within a center pole having an associated magnetic polarity and generating a flux path through an air gap, a voice coil at least partially positioned in the air gap and having an inside diameter larger than an outside diameter of the first permanent magnet, a frame, a spider connecting the voice coil to the frame, and a diaphragm connected between the voice coil and the frame. A tweeter is generally coaxially positioned relative to the woofer and includes a second permanent magnet. A third permanent magnet is coaxially positioned between the woofer and the tweeter. A non-magnetic structure may encompass the third permanent magnet.
Public/Granted literature
- US20140363041A1 MULTI-WAY COAXIAL LOUDSPEAKER WITH INTERNAL MAGNET MOTOR AND PERMANENT MAGNET CYLINDER Public/Granted day:2014-12-11
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