Flat type motorized vibrators with high vibration output
US7723881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Oct 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K3/47
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention involves a type of flat, motor-driven vibrator that does not increase the outer physical dimensions of the vibrator while increasing the amount of vibration by changing the mass and balance of the eccentric rotor. The base structure of the eccentric rotor is made of high-density alloy. Two or more coils are installed over the protuberances of the alloy oscillator and a circuit board is installed into the other end of the oscillator. A self-lubricating and wear-resistant, low-density plastic material is injected into the gap between the coils, the oscillator, and the circuit board to mold them together. A cylindrical bore in the middle of the molded plastic is used as a rotor bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.