| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive system capable of ensuring a size large enough to drive a body to be driven with miniaturization attained. <P>SOLUTION: The drive system 30 of a lens unit 1 can linearly drive a protrusion 202 in a predetermined direction along an optical axis O interlocking with rotational movement of a lever 60 because the protrusion 202 of the lever 60 is displaced along the direction crossing the optical axis O when the lever 60 rotationally moves. When the rotational movement is converted into a linear drive by means of a cum, a stroke of a lens 20 having the protrusion 202 cannot be increased unless a large-size cum is used. However, because the length of a string connecting both ends of a circular arc as a rotating path of the lever 60 can work as a stroke length, the stroke of the lens 20 having the protrusion 202 can be positively increased with the miniaturization of the drive system attained. Furthermore, this drive system can ensure less energy loss due to friction and improve driving efficiency more than a case where the protrusion 202 is friction-connected to a drive shaft moved by an oscillating body 40. <P>COPYRIGHT: (C)2007,JPO&INPIT |
