JP2012047991A - 駆動モータおよび光量調節装置 - Google Patents
駆動モータおよび光量調節装置 Download PDFInfo
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Abstract
【解決手段】ローターマグネット102を取り付けられている回転軸21と、該回転軸を回転自在に軸支する軸受部材26と、を備える駆動モータ11であって、回転軸の一端側に凸面の球形状部21aが形成される一方、回転軸がスラスト方向に移動する際に球形状部に対面する軸受部材の軸受面が凹面の球面軸受面28aに形成されており、軸受部材の球面軸受面の曲率半径が回転軸の球形状部の曲率半径よりも1.5倍〜2倍の範囲内の大きさになるように形成されている。
【選択図】図3
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Claims (3)
- 回転体を取り付けられている回転軸と、該回転軸を回転自在に軸支する軸受部材と、を備える駆動モータであって、
前記回転軸の端部の一方あるいは双方に凸面の球形状部が形成される一方、
前記回転軸がスラスト方向に移動する際に当該端部の前記球形状部に対面する前記軸受部材の軸受面が凹面の球面軸受面に形成されており、
前記軸受部材の前記球面軸受面の曲率半径が前記回転軸の前記球形状部の曲率半径よりも大きく形成されていることを特徴とする駆動モータ。 - 前記軸受部材の前記球面軸受面の曲率半径が前記回転軸の前記球形状部の曲率半径よりも1.5倍〜2倍の範囲内の大きさになるように形成されていることを特徴とする請求項1に記載の駆動モータ。
- 上記請求項1または2に記載の駆動モータの回転軸と一体回転するように光量調節機構が連結されて、該駆動モータの駆動力により光量調節を行うことを特徴とする光量調節装置。
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JP2012047991A true JP2012047991A (ja) | 2012-03-08 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105137697A (zh) * | 2015-09-18 | 2015-12-09 | 中山联合光电科技股份有限公司 | 一种口径大、厚度薄的电磁式光圈装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004138939A (ja) * | 2002-10-21 | 2004-05-13 | Canon Electronics Inc | 光量調節装置 |
JP2004151743A (ja) * | 2003-12-24 | 2004-05-27 | Nisca Corp | 光量調節装置の製造方法 |
JP2008003437A (ja) * | 2006-06-26 | 2008-01-10 | Nisca Corp | 光量調整装置 |
JP2010138992A (ja) * | 2008-12-11 | 2010-06-24 | Nippon Densan Corp | 軸受装置、スピンドルモータ、及びディスク駆動装置 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004138939A (ja) * | 2002-10-21 | 2004-05-13 | Canon Electronics Inc | 光量調節装置 |
JP2004151743A (ja) * | 2003-12-24 | 2004-05-27 | Nisca Corp | 光量調節装置の製造方法 |
JP2008003437A (ja) * | 2006-06-26 | 2008-01-10 | Nisca Corp | 光量調整装置 |
JP2010138992A (ja) * | 2008-12-11 | 2010-06-24 | Nippon Densan Corp | 軸受装置、スピンドルモータ、及びディスク駆動装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105137697A (zh) * | 2015-09-18 | 2015-12-09 | 中山联合光电科技股份有限公司 | 一种口径大、厚度薄的电磁式光圈装置 |
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