Lens driving apparatus
View Patent ↗A lens driving apparatus comprises a lens portion having at least one lens ( 21 ), a first driving portion ( 39 ) to cause a movement of said lens portion relatively to a base portion ( 40 ) along a vertical direction of a light axis (L) of said lens portion, and a second driving portion ( 38 ) to cause a movement of said lens portion relatively to said base portion along said light axis.
1. A lens driving apparatus comprising:
a lens portion having at least one lens,
a base portion on which an image sensor detecting light coming through said lens portion is fixed,
a first driving portion to cause a movement of said lens portion relatively to said base portion along a vertical direction of a light axis of said lens portion,
a second driving portion to cause a movement of said lens portion relatively to said base portion along said light axis,
a focus portion including said lens portion and said second driving portion,
at least three suspension wires connecting said focus portion and said base portion so as to allow a relative movement, wherein
a magnet of said focus portion faces a position sensor and a coil of said first driving portion fixed on said base portion in a light axis direction.
2. The lens driving apparatus as set forth in claim 1 , wherein
said position sensor is composed of X-direction position sensor and Y-direction position sensor,
said magnet of the focus portion includes X-direction blurring compensation magnet and Y-direction blurring compensation magnet,
said X-direction position sensor and Y-direction position sensor performs position detecting of said focus portion by detecting a magnetic field variation caused by the movement of said X-direction blurring compensation magnet and Y-direction blurring compensation magnet.
3. The lens driving apparatus as set forth in claim 2 , wherein
said coil of the first driving portion has X-direction blurring compensation coil and Y-direction blurring compensation coil,
said X-direction position sensor and said X-direction blurring compensation coil are arranged along a longitudinal direction of said X-direction blurring compensation magnet, and
said Y-direction position sensor and said Y-direction blurring compensation coil are arranged along a longitudinal direction of said Y-direction blurring compensation magnet.
4. A lens driving apparatus comprising:
a lens portion having at least one lens,
a base portion on which an image sensor detecting light coming through said lens portion is fixed,
a first driving portion to cause a movement of said lens portion relatively to said base portion along a vertical direction of a light axis of said lens portion,
a second driving portion to cause a movement of said lens portion relatively to said base portion along said light axis,
a focus portion including said lens portion and said second driving portion, and
four suspension wires connecting said focus portion and said base portion so as to allow a relative movement, wherein
said first driving portion can make said focus portion move to X-direction and Y-direction which are vertical direction to said light axis and mutually orthogonal,
a rigidity to said X-direction of said four suspension wires and a rigidity to said Y-direction of said four suspension wires are substantially equal, and
coils of the first driving portion are fixed on said base portion respectively to face four rod-like magnets of said focus portion, and said suspension wires are arranged at four corners of said base portion viewing from a direction of the light axis.
5. The lens driving apparatus as set forth in claim 4 , wherein
at least three suspension wires have a substantially circular shaped cross section respectively.