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US 2019/0103798 A1Published application
Voice coil motor and lens moving device
AssigneeFUJIFILM Corporation
InventorYuichi KAWANABE
Life of this patent
Estimating the term…
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.
Claims14
A voice coil motor comprising:
- a yoke that includes a magnet holding portion and a coil insertion portion held in parallel with the magnet holding portion with a gap therebetween;
- a magnet that is fixed to a surface of the magnet holding portion facing the coil insertion portion;
- and
- a coil which is inserted into the coil insertion portion and is moved along the coil insertion portion by the application of current;
- and
- an opening that is provided in the magnet holding portion toward both end positions of the magnet holding portion from a middle position of movement positions of the coil and is formed to pass through the magnet holding portion.
3 more elements
A voice coil motor comprising:
- a yoke that includes a magnet holding portion and a coil receiving portion held in parallel with the magnet holding portion with a gap therebetween;
- a magnet that is fixed to a surface of the magnet holding portion facing the coil receiving portion and includes an N-polar surface on one side of a boundary line and an S-polar surface on the other side thereof;
- a coil that is provided between the magnet and the coil receiving portion and is moved along the coil receiving portion in a direction orthogonal to the boundary line;
- and
- a plurality of openings that are formed to pass through the magnet holding portion and are arranged on both sides of the boundary line in parallel with the boundary line.
2 more elements
Dependencies are inferred from the claim text.