Patent ID: 8643962
Filing Date: 2014-02-04
Classification: G02B

Abstract:
1. A lens moving mechanism comprising: a guide shaft which extends in an optical axis direction; a lens frame which is biased in said optical axis direction and includes a fit-on portion which is fitted onto said guide shaft; and a lead screw which is formed directly on a drive shaft of a motor, which is driven to rotate in accordance with control information, said lead screw extending parallel to said guide shaft; and a nut member which is screw-engaged with said lead screw while being prevented from rotating integrally with said lead screw, wherein said nut member moves forward and rearward in said optical axis direction relative to said lead screw in accordance with rotation of said lead screw, wherein said lens frame comprises a transfer portion which follows movement of said nut member, wherein an effective length of said guide shaft is greater than an effective length of said lead screw so that an end of said guide shaft and said motor overlap each other in said optical axis direction, wherein at least part of said fit-on portion of said lens frame is positioned at a position where said end of said guide shaft and said motor overlap each other in said optical axis direction when said lens frame is positioned at one of opposite ends of a moving range of said lens frame, and wherein said at least part of said fit-on portion of said lens frame is positioned to face said lead screw in a direction orthogonal to said optical axis when said lens frame is positioned at the other of said opposite ends of said moving range of said lens frame.