| US 7,486,452 B2 | ||
| Optical pickup for use in optical disk device and method of manufacturing the same | ||
| Yasushi Kinoshita, Hitachinaka (Japan); Hidenao Saito, Yokohama (Japan); and Akio Yabe, Fujisawa (Japan) | ||
| Assigned to Hitachi Media Electronics Co., Ltd., Iwate (Japan) | ||
| Filed on Sep. 27, 2007, as Appl. No. 11/862,228. | ||
| Claims priority of application No. 2006-342057 (JP), filed on Dec. 20, 2006. | ||
| Prior Publication US 2008/0151397 A1, Jun. 26, 2008 | ||
| Int. Cl. G02B 7/02 (2006.01); G11B 7/00 (2006.01) | ||
| U.S. Cl. 359—813 [359/824; 369/44.14] | 4 Claims |
| 1. An optical pickup for use in an optical disk device, comprising:
a motor having a rotation shaft;
a first thrust bearing at one end of said motor rotation shaft;
a second thrust bearing at the other end of said motor rotation shaft;
a base for fixing a motor case of said motor;
a lead screw fitted to said motor rotation shaft;
a screw mechanism for converting rotation of said lead screw into linear motion;
a lens holder to be moved in a thrust direction by said screw mechanism;
a lens to be held by said lens holder; and
preload means for exerting preload of the thrust direction on said lens holder,
wherein said second thrust bearing can adjust a position in the thrust direction.
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