Patent ID: 7463428
Filing Date: 2008-12-09
Classification: G02B,G03B

Abstract:
1. A lens barrel which holds a lens, comprising: (a) a stationary main frame; (b) a first movable frame having the shape of a square tube; (c) a second movable frame having the shape of a square tube, the first movable frame and the second movable frame being provided coaxially in the order toward an optical axis of the lens, and capable of being telescopically moved in and out from the stationary main frame; (d) a first support member comprising two arm portions, a connecting portion to connect the two arm portions, a first pivot provided orthogonal to the optical axis by which the two arm portions are engaged with the first movable frame, and a pivot parallel with the first pivot by which the first support member is pivotally supported on the stationary main frame; (e) a second support member comprising two arm portions, a connecting portion to connect the two arm portions, a second pivot orthogonal to the optical axis and the first pivot by which the two arm portions are engaged with the first movable frame, and a pivot parallel with the second pivot by which the second support member is pivotally supported on the stationary main frame; (f) a first connection member comprising two arm portions and a connecting portion to connect the two arm portions, wherein each of one ends of the two arm portions is pivotally supported on the second movable frame by a third pivot parallel with the first pivot, and each of the other ends is engaged with the first movable frame as a fourth pivot parallel with the first pivot, or each of one ends of the two arm portions is engaged with the second movable frame as a third pivot parallel with the first pivot, and each of the other ends is pivotally supported on the first movable frame by a fourth pivot parallel with the first pivot; and (g) a second connection member comprising two arm portions and a connecting portion to connect the two arm portions, wherein each of one ends of the two arm portions is pivotally supported on the second movable frame by a fifth pivot parallel with the second pivot, and each of the other ends is engaged to the first movable frame as a sixth pivot parallel with the second pivot, or each of one ends of the two arm portions is engaged with the second movable frame as a fifth pivot parallel with the second pivot, and each of the other ends is pivotally supported on the first movable frame by a sixth pivot parallel with the second pivot, and wherein each of the two arm portions of the first support member and each of the two arm portions of the first connection member are engaged with each other.