Vibrating device for axially vibrating a movable member
US6700251B2 · kind B2 · utility
3Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Oct 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K33/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cup-shaped yoke is axially movably provided in a cylindrical frame, and a cylindrical permanent magnet is securely provided in the yoke. A coil bobbin is cantilevered in the frame and inserted in a space between the yoke and the permanent magnet, and a driving coil is mounted on the coil bobbin. The yoke is held by a pair of coil springs for resiliently holding the yoke in the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.