Title:
A rack and the optical apparatus using it
Document Type and Number:
Japanese Patent JP6161361
Kind Code:
B2
Abstract:
The rack includes a first member having a first tooth engaged with a lead screw, a second member having a second tooth engaged with the lead screw, a third member having a third tooth engageable with the lead screw, a first forcing unit configured to apply a force between the first and second members, a second forcing unit configured to apply a force between the first member and third members, and a limiter configured to limit a distance between the third tooth and the lead screw so that the third tooth is separated from the lead screw when the first and second teeth are engaged with the lead screw by the force applied by the first forcing unit and a distance between the first tooth and the third tooth is smaller than an outer diameter of the lead screw.
Inventors:
Takehiko Sato
Application Number:
JP2013070862A
Publication Date:
July 12, 2017
Filing Date:
March 29, 2013
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/04; F16C17/08; H02K5/167; H02K7/116; H02K37/14
Domestic Patent References:
| JP2000023446A | ||||
| JP2012252288A | ||||
| JP2008039942A | ||||
| JP2001228500A | ||||
| JP2005315935A |
Foreign References:
| US20120314311 | ||||
| US20100007972 |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya
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