| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens unit provided with a supporting part capable of reducing energy loss caused when a piezoelectric element vibrates. SOLUTION: This zoom lens unit 1 includes a lens-barrel 3, a group 7 of second lenses, a group 9 of third lenses, and a pedestal 4. A first guide shaft 11 and a second guide shaft 13 are provided by passing through the group 7 of second lenses and the group 9 of third lenses. The lens-barrel 3 is provided with the first supporting parts 81a, 81b supporting the first and second guide shafts 11, 13, respectively. The first supporting parts 81a, 81b have a thin-walled shape formed by chamfering their surfaces into a conical shape. A lid body 63 of the pedestal 4 is provided with the second supporting parts 91a, 91b supporting the first and second guide shafts 11, 13 at positions where the first and second guide shafts 11, 13 pass through. The second supporting parts 91a, 91b have a thin-walled shape formed by chamfering their surfaces into a conical shape. COPYRIGHT: (C)2009,JPO&INPIT
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