Speaker
US8041070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | May 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a small speaker. A speaker 1 comprises: a magnetic circuit 3 having a yoke 7, a magnet 15, and a pole piece 16; a vibration system 4 having a voice coil 18 and diaphragm 19 which are joined to each other through a voice coil bobbin 23; and a frame 2 which holds the magnetic circuit 3 and the vibration system. The voice coil is placed in a magnetic gap 17. In the speaker, dampers 26 which are extended respectively from a plurality of places of an opening side end portion of the voice coil bobbin are disposed, and tip end portions of said dampers are bonded and fixed to the frame. The voice coil bobbin is supported from the lower side. The resistance to input is improved without impairing the thinness of the speaker 1, and while suppressing the increase of the production cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.