# US 2014/0153112 A1 · Lens barrel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153112 A1 - Document ID: US20140153112A1 - Status: Published application - Kind: A1 - Application number: 14/173,057 - Filed: 2014-02-05 - Published: 2014-06-05 - Earliest claimed: 2011-11-11 - Assignees: Panasonic Corporation - Applicants: Panasonic Corporation - Inventors: Hiroyasu FUJINAKA - Web page: https://patentgrep.com/patent/US20140153112A1 ## CPC - G02B 7/04: with mechanism for focusing or varying magnification - G02B 7/08: adapted to co-operate with a remote control mechanism - G02B 7/102: {controlled by a microcomputer (cameras with interchangeable lenses G03B17/14)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract The present lens barrel is provided with a cylindrical moving frame and a cylindrical cam frame disposed on the inner periphery of the moving frame. The cylindrical moving frame has a first cam follower and a second cam follower. The first cam follower projects radially from the inner peripheral surface or the outer peripheral surface. The second cam follower projects radially further from the top of the first cam follower. The cylindrical cam frame is disposed on the inner periphery or the outer periphery of the moving frame, and has a first cam and a second cam on the outer peripheral surface side or the inner peripheral surface side. The first cam engages with the first cam follower, and has a cam surface only on the image plane side in the optical axis direction. The second cam is formed on the bottom surface of the first cam, and engages with the second cam follower. ## Claims ### Claim 1 A lens barrel, comprising: a cylindrical moving frame having a first cam follower that projects radially from the inner peripheral surface or the outer peripheral surface and a second cam follower that projects radially further from the top of the first cam follower; and a cylindrical cam frame disposed on the inner periphery or the outer periphery of the moving frame, and having on the outer peripheral surface side or the inner peripheral surface side a first cam that engages with the first cam follower and has a cam surface only on the image plane side in the optical axis direction and a second cam that engages with the second cam follower, the second cam being formed on the bottom surface of the first cam. ### Claim 2 (depends on 1) The lens barrel according to claim 1, wherein the first cam follower has a larger cross-sectional area than the second cam follower. ### Claim 3 (depends on 1) The lens barrel according to claim 1, wherein the end parts on the image-plane-most side in the optical axis direction of the first cam follower and the second cam follower are provided at substantially the same height. ### Claim 4 (depends on 1) The lens barrel according to claim 1, wherein an angle α, which is formed by two mutually opposite cam surfaces constituting the first cam, is smaller than an angle β, which is formed by two mutually opposite cam surfaces constituting the second cam. ### Claim 5 (depends on 1) The lens barrel according to claim 1, wherein the cam frame has a thick-walled part provided on the image plane side of the first cam and forming a cam surface of the first cam and a thin-walled part provided on the subject side of the first cam and having a smaller thickness than the thick-walled part. ### Claim 6 (depends on 1) The lens barrel according to claim 1, wherein the moving frame has a reinforcing part that is provided further toward the subject side than a region opposing the second cam on the cam frame side and has a larger thickness than the other portion thereof. ### Claim 7 (depends on 2) The lens barrel according to claim 2, wherein the end parts on the image-plane-most side in the optical axis direction of the first cam follower and the second cam follower are provided at substantially the same height. ### Claim 8 (depends on 2) The lens barrel according to claim 2, wherein an angle α, which is formed by two mutually opposite cam surfaces constituting the first cam, is smaller than an angle β, which is formed by two mutually opposite cam surfaces constituting the second cam. ### Claim 9 (depends on 2) The lens barrel according to claim 2, wherein the cam frame has a thick-walled part provided on the image plane side of the first cam and forming a cam surface of the first cam and a thin-walled part provided on the subject side of the first cam and having a smaller thickness than the thick-walled part. ### Claim 10 (depends on 2) The lens barrel according to claim 2, wherein the moving frame has a reinforcing part that is provided further toward the subject side than a region opposing the second cam on the cam frame side and has a larger thickness than the other portion thereof. ### Claim 11 (depends on 3) The lens barrel according to claim 3, wherein an angle α, which is formed by two mutually opposite cam surfaces constituting the first cam, is smaller than an angle β, which is formed by two mutually opposite cam surfaces constituting the second cam. ### Claim 12 (depends on 3) The lens barrel according to claim 3, wherein the cam frame has a thick-walled part provided on the image plane side of the first cam and forming a cam surface of the first cam and a thin-walled part provided on the subject side of the first cam and having a smaller thickness than the thick-walled part. ### Claim 13 (depends on 3) The lens barrel according to claim 3, wherein the moving frame has a reinforcing part that is provided further toward the subject side than a region opposing the second cam on the cam frame side and has a larger thickness than the other portion thereof. ### Claim 14 (depends on 4) The lens barrel according to claim 4, wherein the cam frame has a thick-walled part provided on the image plane side of the first cam and forming a cam surface of the first cam and a thin-walled part provided on the subject side of the first cam and having a smaller thickness than the thick-walled part. ### Claim 15 (depends on 4) The lens barrel according to claim 4, wherein the moving frame has a reinforcing part that is provided further toward the subject side than a region opposing the second cam on the cam frame side and has a larger thickness than the other portion thereof. ### Claim 16 (depends on 5) The lens barrel according to claim 5, wherein the moving frame has a reinforcing part that is provided further toward the subject side than a region opposing the second cam on the cam frame side and has a larger thickness than the other portion thereof.