Tablet woofer and electronic device using same
US9769572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2013 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | May 31, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tablet woofer and an electronic device using same. The woofer comprises a vibrating diaphragm, at least four mutually independent drive units, and a housing. The vibrating diaphragm is a rectangle shape, and comprises a rigid arc portion at the central position and a spiral curve portion at the periphery; the drive unit comprises a voice coil unit and a corresponding magnetic circuit unit, and four angles of the arc portion of the vibrating diaphragm are each combined with one voice coil unit; the housing is provided with mounting holes for accommodating and mounting the drive units, and sound holes penetrating through the mounting plane; the spiral curve portion of the vibrating diaphragm is fixedly connected to the periphery of the upper side of the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.