Patent ID: 8755129
Filing Date: 2014-06-17
Classification: G02B,G03B

Abstract:
1. A lens barrel, having a shooting region and a retracted region, comprising: a linear guiding member having a first linear movement groove, a second linear movement groove, and an impact groove, each extending in an optical axis direction of the lens barrel; a cam barrel having a cam barrel groove, said cam barrel moving in the optical direction while rotating; and a linear movement unit being movable in the optical direction relative to said linear guiding member, and having a first linear movement pin engaging the first linear movement groove, a second linear movement pin engaging the second linear movement groove, and an impact pin engaging the impact groove, wherein said linear guiding member includes a cam groove, a first crossing part at which the cam groove crosses the first linear movement groove, and a second crossing part at which the cam groove crosses the second linear movement groove, wherein, the locations of the first and second crossing parts are different from each other in the optical direction so that the first linear movement pin engages the first linear movement groove when the second linear movement pin is at the second crossing part and the second linear movement pin engages the second linear movement groove when the first linear movement pin is at the first crossing part, and wherein when the lens barrel receives an external force, the impact pin abuts against the impact groove.