Patent ID: 7289283
Filing Date: 2007-10-30
Classification: G02B,H04N

Abstract:
1. A lens barrel, comprising: a lens moving frame configured to hold an image pickup lens; a barrel member configured to support said lens moving frame for back and forth linear movement along the direction of an optical axis of said image pickup lens; said lens moving frame having a magnetized face magnetized alternately with N poles and S poles along the direction of the back and forth linear movement; and a magnetic resistance sensor apparatus provided at an attaching portion of said barrel member and configured to detect said magnetized face to produce a detection signal corresponding to an amount of movement of said lens moving frame; said magnetic resistance sensor apparatus including a magnetic resistance sensor having a sensing face, a body having said magnetic resistance sensor attached to the body with said sensing face exposed, a single screw fitted in said body in a direction perpendicular to said sensing face and configured to attach said body to said attaching portion with said sensing face opposed to said magnetized face, and a plurality of resilient pieces provided on said body for resilient deformation in a direction perpendicular to said sensing face and configured to contact, in a state wherein said body is attached to said attaching portion by said single screw, with said attaching portion so as to be resiliently deformed all by the same amount by said attaching portion to keep said sensing face in parallel to said magnetized face,