Coil component
US8093978B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2011 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coil component 1 includes: a pot core 2; a coil 10 for generating magnetic flux when a predetermined electric current is supplied; a piezoelectric actuator 15 for changing the position of a movable core portion 11 with respect to the coil 10 in response to a control signal supplied from the outside and for passing the movable core portion 11 through the magnetic flux of closed magnetic-path, which is generated by the coil 10. Also, the piezoelectric actuator 15 includes: a piezoelectric device 9 for creating displacement in parallel with the thickness direction caused by the control signal, a moving body 11 connected to the piezoelectric device 9 and the movable core portion 11 for moving the movable core portion 11 in response to the displacement which occurred for the piezoelectric device 9, and a friction-drive rod 13 for rendering the moving body 11 moved by the displacement which occurred for the piezoelectric device 9 to be stationary at a predetermined position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.