Speaker
US10951977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2017 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Oct 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2207/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker includes a main-cone and a sub-cone. Linear thin portions configured to reduce a plate thickness of the sub-cone are formed on a region containing at least any one of an outer side and an inner side of the sub-cone. Each of the linear thin portions has both of a component in a radial direction and a component in a circumferential direction of the sub-cone. First and second linear thin portions cross each other at an intersection. With this configuration, stiffness of the whole sub-cone is reduced to enhance a divided vibration of the sub-cone. In particular, a vibrational displacement of an outer peripheral portion of the sub-cone, from which a sound is mainly radiated, is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.