Lens Driving Device and Portable Equipment with Camera

Abstract

A lens driving device includes a moving body having a lens and a drive magnet that is moveable with the lens in an optical axis direction of the lens, and a fixed body that moveably supports the moving body in the optical axis direction. The fixed body includes a first drive coil and a second drive coil that are disposed in the optical axis direction and form magnetic circuits with the drive magnet, and a first magnetic member and a second magnetic member that are disposed opposite the first drive coil and the second drive coil, respectively. The moving body is retained at a first position by magnetic attraction working between the drive magnet and the first magnetic member when energization of the first drive coil is stopped. The moving body is also retained at a second position by magnetic attraction working between the drive magnet and the second magnetic member when energization of the second drive coil is stopped.

1 - 29 . (canceled) 
   
   
       30 . A lens driving device comprising:
 a moving body having a lens; and   a fixed body that moveably supports the moving body in an optical axis direction of the lens,   wherein the moving body is equipped with one of a drive magnet and a drive coil, the fixed body is equipped with another of the drive magnet and the drive coil, and the drive magnet and the drive coil are disposed so that the moving body is moved in the optical axis direction by one of mutual magnetic attractive force and mutual magnetic repelling force working between the drive magnet and the drive coil from a first position to a second position, and   wherein the moving body is received with a buffer effect at the second position when the moving body is moved to the second position by one of mutual magnetic attractive force and mutual magnetic repelling force working between the drive magnet and the drive coil.   
   
   
       31 . The lens driving device according to  claim 30 , further comprising a buffer member  36  disposed on the fixed body, wherein the buffer member applies the buffer effect to the moving body at the second position. 
   
   
       32 . The lens driving device according to  claim 31 , wherein the buffer member  36  is provided in order to prevent an impact force from being generated when the moving body is moved forward by one of mutual magnetic attractive force and mutual magnetic repelling force working between the drive magnet and the drive coil. 
   
   
       33 . The lens driving device according to  claim 31 , wherein the lens driving device is used in a portable telephone. 
   
   
       34 . The lens driving device according to  claim 33 , wherein the second position is a macro photographing position.