| 摘要 |
PROBLEM TO BE SOLVED: To obtain the lens barrel which is easily assembled and inexpensive by equipping the lens barrel with a slider which is formed integrally with a lens frame and a cam follower which is formed integrally with the lens frame or slider. SOLUTION: A power varying lens 14 and a correcting lens 16 are supported on lens frames 22 and 24. The lens frames 22 and 24 have rod type sliders 22A and 24B formed integrally so as to make the lens frames 22 and 24 slidable along an optical axis L. The respective corresponding sliders 22A and 24B are fitted in rectilinear grooves 32A and 32B formed on the internal surface of the lens barrel 10. The lens frames 22 and 24 have the cam follower 25 formed in one body and a bush 26 for sliding is inserted into the cam follower 25 while circumscribed. This bush 26 is engaged with the cam groove 30 for power varying lens and the cam groove 34 for correcting lens of an external cam cylinder 28 through a slit 31 formed on the lens barrel 10.
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