| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel that allows a toric seal member to be easily anchored in an inner peripheral face of a frame member.SOLUTION: A lens barrel according to the present invention comprises: a cylindrical first frame; a second frame that, in the first frame, relatively moves forward and backward in an axial direction with respect to the first frame; a seal member that is formed in an inner peripheral face of the first frame, and includes a recess part composed of an engagement face composed of a cylindrical face, and an adhesion face protruding inward in a radial direction from the engagement face and composed of a flat face orthogonal to a central axis of the engagement face, a toric base part having an outer diameter getting into the engagement face, and a lip part extending inward in the radial direction from the base part and coming into slide contact with an outer peripheral face of the second frame; and an adhesive agent that lies between the adhesion face and the base part. The base part has an edge face being a flat face that is parallel to the adhesion face in a state where the base part gets into the engagement face.SELECTED DRAWING: Figure 3 |
