Miniature speaker
US9578421B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2014 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Mar 11, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A vibration unit of a miniature speaker is disclosed that the vibration unit has a diaphragm, a voice coil driving the diaphragm along a vibration direction, and a support around which the voice coil is wound. The support includes a base attached to the diaphragm, and a number of sidewalls each extending from a bound of the base along the vibration direction to a distal end thus forming an edge connecting the distal end and the bound. The support further includes a number of smooth corners formed at the edges of the sidewalls. For forming the smooth corners, each of the sidewalls includes two flanges extending from two edges for protecting the voice coil from being cut broken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.