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:
Sep. 19, 2023
Filed:
Dec. 13, 2021
Aac Microtech (Changzhou) Co., Ltd., Changzhou, CN;
Jiujian Liu, Shenzhen, CN;
AAC Microtech (Changzhou) Co., Ltd., Changzhou, CN;
Abstract
The present disclosure provides a dual magnetic circuits structure and a sound device, the dual magnetic circuits structure includes a shell and an inner magnetic assembly, the shell is made of a magnetically permeable material, the inner magnetic assembly is arranged in the shell and includes a first inner magnetic element and a second inner magnetic element, a first magnetic gap, a second magnetic gap, an outer diameter of the second inner magnetic element is greater than that of the first inner magnetic element. Therefore, compared to the existing dual magnetic circuits structure, the dual magnetic circuits structure provided by the present invention has the advantage that the thickness of the whole dual magnetic path structure can be effectively reduced while ensuring that the vibration spaces and winding heights of the first voice coil and the second voice coil are not changed.