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Patent Searching and Data

Document Type and Number:
Japanese Patent JP2018194752
Kind Code:
To solve the problem that, in a driving device suitable for driving lenses, a roller of planetary rotation is formed in a stepped shape by a small diameter part and a large diameter part in order to decrease a rotation speed of a MF side relative to the rotation speed of an AF side, and a reduction ratio is given by causing an input of the AF side to abut against the small diameter part and causing the input of the MF side to abut against the large diameter part, and in this case, since a height position from the large diameter part and the small diameter part is different from each other, an axial-loss due to application of a twisting strain on the axis of the roller is generated, and transmission efficiency is decreased.SOLUTION: A screw strain applied to a roller axis is suppressed by arranging a separate large diameter roller using a stepped roller as an engaging axis so as to sandwich a small diameter part of the roller attached with a step which is planetary rotating.SELECTED DRAWING: Figure 2

杉田 潤
Application Number:
Publication Date:
December 06, 2018
Filing Date:
May 22, 2017
Export Citation:
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International Classes:
G02B7/04; F16H13/08; G02B7/08
Attorney, Agent or Firm:
高梨 幸雄