| US 7,572,012 B2 | ||
| Optical elevation apparatus | ||
| Yukitsugu Nakamura, Sagamihara (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 30, 2007, as Appl. No. 11/694,211. | ||
| Claims priority of application No. 2006-108233 (JP), filed on Apr. 11, 2006. | ||
| Prior Publication US 2007/0236658 A1, Oct. 11, 2007 | ||
| Int. Cl. A61B 3/00 (2006.01) | ||
| U.S. Cl. 351—245 | 5 Claims |
| 1. An optical elevation apparatus for elevating an optical system body, comprising:
an optical system body adapted to elevate around a predetermined fixed point of the optical elevation apparatus;
a guide member adapted to guide an elevation of the optical system body;
a hook provided to the guide member and adapted to fix one end of a traction cord member;
a spring unit provided to the optical system body and adapted to take up the traction cord member to generate a traction force;
and
a pulley for the traction cord member, which is provided to the guide member,
wherein the pulley is arranged inside the guide member such that the traction cord member runs through the optical system
body.
|