The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2017
Filed:
Apr. 13, 2014
Wenjin Sha, Zhongshan, CN;
Wenjin Sha, Zhongshan, CN;
Yongming Wang, Zhongshan, CN;
Other;
Abstract
A double-voice coil moving-coil loudspeaker comprises a bracket. A U-shaped cup with a circular groove is fixed in the bracket. A vibrating diaphragm is fixed on the bracket at the position of the U-shaped cup. A large voice coil and a small voice coil distributed in a concentric circle are arranged on the vibrating diaphragm. A circular large magnet and a circular small magnet distributed in a concentric circle are arranged in the U-shaped cup. A circular big washer and a circular small washer are respectively arranged on an upper surface of the large magnet and the small magnet. The big voice coil and the small voice coil are respectively arranged in a gap formed by the U-shaped cup and the big washer and a small gap formed between the U-shaped cup and the small washer. The U-shaped cup is provided with air vents. The air vents of the U-shaped cup are communicated with a gap between the big washer and the smaller washer and a gap between the big magnet and the small magnet. The invention has the benefit of improving sound quality while reducing the cost of manufacturing.