Audio transducer with forced ventilation of motor and method
US11611830B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 2019 |
| Grant date | Mar 21, 2023 |
| Priority date | — |
| Expiry date | Sep 19, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromechanical transducer (e.g., 200 or 300) includes a motor structure and voice coil winding support structure or former (203 or 303) configured with a vented annular spacer (e.g., 250) and vented distal pole tip member (e.g., 255) having aligned radial channels aimed to transport heat away from a voice coil (202 or 302) during the transducer's reciprocating movement while providing an extended, linear dynamic range and continuous cooling for the voice coil. A dual magnetic gap embodiment has an inside annular spacer member (e.g., 355A) and a co-planar outside annular spacer member (e.g., 350-O), each made of a thermally conductive steel alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.