Acoustic piezoelectric vibrator and loudspeaker using the same
US6088464A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Jun 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a piezoelectric vibrator used for acoustic equipment, a vibration control piece composed of an elastomer is attached to the peripheral section of the piezoelectric plate of the vibrator. The shape of the vibration control plate is decided so that the distance between an axial line which is perpendicular to the straight line connecting the center of the piezoelectric plate to the center of gravity of the vibration control piece and passing through the center of the plate and the center-of-mass line of the vibration control plate can change along the axial line, or the masses of the cut pieces of the vibration control plate cut along a plurality of straight lines parallel to the straight line connecting to the center of the piezoelectric plate to the center of gravity of the vibration control piece can change along the axial line which is perpendicular to the straight line and passes through the center of the piezoelectric plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.