发明名称 |
Step motor |
摘要 |
The present invention relates to a PM (Pulse-Width Modulation) type step motor used for conveying an optical pickup lens of media devices or a mobile camera lens. In detail, the present invention relates to a step motor that is composed of a stator, a rotor rotating by interacting with the stator, a lead screw combined with the rotor and rotating with the rotation of the rotor, and a bearing supporting the lead screw and which can perform precise conveying because it can perform fine adjustment and of which the operation state can be precisely sensed by having a position correcting unit that moves the lead screw to a desired position by finely moving it while contracting and stretching and a rotation sensing unit that is disposed at a side of the rotor or a rotary member rotating with the rotor and senses rotation of the rotor. |
申请公布号 |
US9135946(B1) |
申请公布日期 |
2015.09.15 |
申请号 |
US201514645649 |
申请日期 |
2015.03.12 |
申请人 |
|
发明人 |
Yang Hyun-Ki;Oh Seong-Kwan;Ahn Hyok-Sang;Park Se-Hee |
分类号 |
G11B19/20 |
主分类号 |
G11B19/20 |
代理机构 |
Park Law Firm |
代理人 |
Park John K.;Park Law Firm |
主权项 |
1. A step motor comprising:
stators; a rotor rotating by interacting with the stators; a lead screw combined with the rotor and rotating with rotation of the rotor; and a bearing supporting the lead screw, and further comprising a position compensator moving the lead screw to a desired position by finely changing a position of the lead screw while contracting and expanding. |
地址 |
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