Patent ID: 7808728
Filing Date: 2010-10-05
Classification: G02B

Abstract:
1. A lens barrel comprising: a first cylindrical member fixed; a second cylindrical member rotatably disposed inside said first cylindrical member in a diametral direction and capable of moving in an axial direction of an axial center by cam-engaging with said first cylindrical member; a third cylindrical member disposed inside said second cylindrical member in a diametral direction and engaging with said first cylindrical member so as not to be rotatable relative to said first cylindrical member, said third cylindrical member being capable of moving in the axial direction of the axial center by the rotation of said second cylindrical member; a fourth cylindrical member disposed inside said third cylindrical member in a diametral direction, cam-engaging with said third cylindrical member, and engaging with said second cylindrical member so as not to be rotatable relative to said second cylindrical member, said fourth cylindrical member being capable of moving in the axial direction of the axial center by the rotation of said second cylindrical member; and a lens holding member holding an image pickup lens, disposed inside said fourth cylindrical member in a diametral direction, and capable of moving in an axial direction of an optical axis of the image pickup lens by cam-engaging with said fourth cylindrical member and engaging with said third cylindrical member so as not to be rotatable relative to said third cylindrical member.