Photography device with a shake-correction structure
A photography device with anti-shake function for sensing camera shake and moving a lens toward a direction to correct the camera shake when photographing an object so that the object may be clearly photographed. A coil and a magnet are included in the invention, and the coil moves in a direction perpendicular to the optical-axis of the lens as a result of magnetic fields generated by the magnet and the coil when electric power is applied to the coil.
1. A photography device with a shake-correction structure, comprising:
a base;
a cover disposed above the base to form a housing having a space inside thereof;
a lens holder disposed horizontally movably inside the space, the lens holder capable of holding a lens inside thereof;
a coil member fixed to an outer surface of the lens holder and forming a magnetic field when an electric power is applied thereto;
upper magnet and lower magnet fixed to an inner surface of the housing to be positioned spaced apart from the lends holder and the coil member;
an iron piece member one end of which is fixed to an inner surface of the housing between the upper magnet and the lower magnet, and the other end of which passes through a hollow space in a center of the coil member, the coil member being spaced apart from the iron piece member;
a wire spring of which upper end is fixed to the cover and of which lower end is fixed to the lens holder to elastically and movably support the lens holder inside the space of the housing, wherein the wire spring is formed of an electric conductive material and the coil member is electrically connected to an electric power source through the wire spring,
wherein the lens holder moves horizontally by interaction of an electromagnetic field generated by the coil member with the iron piece member and the upper and lower magnets.
2. The photography device of claim 1 , further comprising: a first substrate attached to a bottom surface of the lens holder.
3. The photography device of claim 2 , wherein the lower end of the wire spring is attached to the first substrate.
4. The photography device of claim 2 , wherein a side surface of the cover is formed with an upper fixation part in which the upper magnet is inserted and a side surface of the base is formed with a lower fixation part in which the lower magnet is inserted, and the upper fixation part and lower fixation part are formed with a stopping projection that prevents the upper magnet or the lower magnet from moving towards the lens holder, respectively.
5. The photography device of claim 1 , further comprising:
a control unit mounted below the base to control the electric power supplied to the drive unit coil member; and
a second substrate to which the upper end of the wire spring is penetratively fixed,
wherein the second substrate is formed with a flexible circuit unit that electrically connects the second substrate with the control unit and side surfaces of the cover and the base are formed with a seating groove in which the flexible circuit unit is inserted and seated.
6. The photography device of claim 1 , wherein the upper part of the lens holder is formed with a stopping groove, and the cover is formed with a stopping projection which projects downwardly and inserted in the stopping groove, and rotation and ascent of the lens holder are prevented by the stopping projection and the stopping groove.