Patent ID: 8314997
Filing Date: 2012-11-20
Classification: G02B

Abstract:
1. A zoom lens barrel comprising: a fixed barrel; a guide barrel received in the fixed barrel; a cam barrel received in the fixed barrel and housing the guide barrel; a zoom barrel sandwiched between the guide barrel and the cam barrel; and a lens cover covering on the zoom barrel, wherein the cam barrel comprises a plurality of arc-shaped block radially extending form an end edge thereof and a flange radially positioned on an end close to the lens cover, the flange is opposite to the arc-shaped block, the guide barrel comprises a base portion and a barrel portion extending from the base portion along a direction parallel to an optical axis of the zoom lens barrel, the base portion comprises an outer annulus and an inner annulus spaced from the outer annulus, the inner annulus radially extends from an end of the barrel portion and is arranged above the outer annulus, the arc-shaped block is latched between the outer annulus and the inner annulus and movable around the optical axis, and the zoom barrel comprises a ring portion protruding out from an end close to the fixed barrel, a step surface is formed between an outer side surface of the zoom barrel and that of the ring portion, when the zoom lens barrel is in an unfolded state, the step surface interferingly resists against the flange, to limit a movement between the cam barrel and the zoom barrel along the optical axis.