Voice coil motor and lens moving device
US10819207B2 · kind B2 · utility
0Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2018 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | May 16, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/21
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. Openings are provided toward both end positions of the outer yoke from a middle position of movement positions of the coil. The openings are formed to pass through the outer yoke. The outer yoke can be made lighter while a necessary thrust is ensured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.