Patent ID: 9207425
Filing Date: 2015-12-08
Classification: G02B

Abstract:
1. A lens barrel comprising: a hollow main body, the hollow main body being a cylindrical body and comprising a first upper end at an object side, and a first lower end at an image side, the hollow main body including a central axis passing through the first upper end and the first lower end, the hollow main body further comprising an outer wall and an outer screw thread formed on the outer wall, and an abutting portion formed on the an outer wall, the outer screw thread being located between the first upper end and the abutting portion, the outer screw thread being spaced apart from the abutting portion, the abutting portion being a closed ring-shaped protrusion protruding outwardly from an outer circumferential surface of the outer wall along a radial direction of the hollow main body; wherein the abutting portion comprises a first surface and a second surface adjoining the first surface, the second surface is closer to the first lower end than the first surface, and the first surface and the second surface are ring-shaped surfaces, the abutting portion tapers along a direction away from the central axis, and an outline of a cross section of the abutting portion taken by a plane through the central axis is a parabolic line, the opening of which faces the central axis.