Voice coil motor
AssigneeLG Innotek Co., Ltd.
InventorTae Jin Jung
Life of this patent
Estimating the term…
Abstract
The VCM according to an exemplary embodiment of the present disclosure includes a base unit, a mover including a bobbin arranged at an upper surface of the base unit and formed with a plurality of rotation prevention units along a periphery and a first driving unit arranged at a periphery of the bobbin, a stator including a yoke configured to the base unit to surround the mover and inner yoke units each extended to between the rotation prevention units, and a second driving unit oppositely arranged to the first driving unit, and an elastic member elastically supporting the mover, wherein an object occurrence preventing portion is formed between the rotation prevention unit and the inner yoke units to decrease a contact area between the rotation prevention unit and the inner yoke units.
Claims20
A voice coil motor comprising:
- a base unit;
- a yoke disposed on the base unit;
- a bobbin disposed in the yoke;
- a coil and a magnet disposed in the yoke and configured to move the bobbin in an optical axis direction;
- and
- an upper elastic member coupled to the bobbin,
- wherein the bobbin comprises an upper surface disposed with the upper elastic member, and first and second recesses recessed from the upper surface of the bobbin,
- wherein the second recess is recessed deeper than the first recess from the upper surface of the bobbin,
- wherein the yoke comprises an inner yoke,
- wherein at least a portion of the inner yoke is disposed in the second recess,
- wherein the first recess is disposed next to the second recess so that the first recess is connected to the second recess when viewed from outside the bobbin,
- wherein the portion of the inner yoke is overlapped by a part of the bobbin in a direction perpendicular to a first direction parallel to the optical axis direction and a second direction from the second recess to the optical axis, and
- wherein the portion of the inner yoke is disposed between the coil and the part of the bobbin.
A voice coil motor comprising:
- a base unit;
- a yoke disposed on the base unit;
- a bobbin disposed in the yoke;
- a coil and a magnet disposed in the yoke and configured to move the bobbin in an optical axis direction;
- and
- an upper elastic member disposed on an upper surface of the bobbin,
- wherein the bobbin comprises first and second recesses formed on an outer peripheral surface of the bobbin,
- wherein the second recess is recessed deeper than the first recess with respect to the upper surface of the bobbin,
- wherein the yoke comprises an inner yoke,
- wherein at least a portion of the inner yoke is disposed in the second recess,
- wherein the first recess is disposed next to the second recess so that the first recess is connected to the second recess,
- wherein the second recess is formed between a plurality of rotation prevention units of the bobbin, and
- wherein a part of the outer peripheral surface of the bobbin is overlapped by the inner yoke.
Dependencies are inferred from the claim text.