JP2003219623A5 - - Google Patents

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Publication number
JP2003219623A5
JP2003219623A5 JP2002008525A JP2002008525A JP2003219623A5 JP 2003219623 A5 JP2003219623 A5 JP 2003219623A5 JP 2002008525 A JP2002008525 A JP 2002008525A JP 2002008525 A JP2002008525 A JP 2002008525A JP 2003219623 A5 JP2003219623 A5 JP 2003219623A5
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JP
Japan
Prior art keywords
magnet
magnetic pole
central axis
coil
pole part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2002008525A
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Japanese (ja)
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JP2003219623A (en
JP4006234B2 (en
Filing date
Publication date
Application filed filed Critical
Priority claimed from JP2002008525A external-priority patent/JP4006234B2/en
Priority to JP2002008525A priority Critical patent/JP4006234B2/en
Priority to US10/252,376 priority patent/US6897579B2/en
Priority to CNB021433844A priority patent/CN100454728C/en
Priority to MYPI20023592A priority patent/MY130614A/en
Priority to KR10-2002-0059048A priority patent/KR100495352B1/en
Publication of JP2003219623A publication Critical patent/JP2003219623A/en
Publication of JP2003219623A5 publication Critical patent/JP2003219623A5/ja
Publication of JP4006234B2 publication Critical patent/JP4006234B2/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Claims (4)

中空円盤形状に形成され中心軸に対して直交する平面と外周面と内周面からなり、前記中心軸を回転中心として回転可能に保持されるとともに、前記中心軸に対して直交する少なくとも一方の平面が角度方向に分割され異なる極に交互に着磁されたマグネットと、
前記マグネットの外周面の外側に同軸上に配置された第１のコイル、前記マグネットの内周面の内側に同軸上に配置された第２のコイルと、
前記マグネットの中心軸に対して直交する一方の平面に対向し、前記第１のコイルにより励磁される第１の磁極部と、
前記マグネットの中心軸に対して直交する他の一方の平面に対向し、前記第１のコイルにより励磁される第２の磁極部と、
前記マグネットの中心軸に対して直交する一方の平面に対向し、前記第２のコイルにより励磁される第３の磁極部と、
前記マグネットの中心軸に対して直交する他の一方の平面に対向し、前記第２のコイルにより励磁される第４の磁極部と、
からなることを特徴とするステッピングモータ。It is formed in a hollow disk shape and includes a plane orthogonal to the central axis, an outer peripheral surface, and an inner peripheral surface, and is held rotatably about the central axis as a rotation center, and at least one orthogonal to the central axis A magnet whose plane is divided into angular directions and alternately magnetized to different poles;
A first coil coaxially disposed outside the outer peripheral surface of the magnet, a second coil coaxially disposed inside the inner peripheral surface of the magnet,
A first magnetic pole portion opposed to one plane perpendicular to the central axis of the magnet and excited by the first coil;
A second magnetic pole portion facing the other plane perpendicular to the central axis of the magnet and excited by the first coil;
A third magnetic pole portion opposed to one plane orthogonal to the central axis of the magnet and excited by the second coil;
A fourth magnetic pole portion opposed to the other plane perpendicular to the central axis of the magnet and excited by the second coil;
A stepping motor characterized by comprising: 前記第２の磁極部と前記第４の磁極部が同一部材からなることを特徴とする請求項１に記載のステッピングモータ。  The stepping motor according to claim 1, wherein the second magnetic pole part and the fourth magnetic pole part are made of the same member. 前記第１の磁極部が前記マグネットに対向する位置は、前記第３の磁極部が前記マグネットに対向する位置に対して外周面側であり、前記第１の磁極部が前記マグネットに対向する面積をＳ１、前記第３の磁極部が前記マグネットに対向する面積をＳ２とすると、Ｓ１＜Ｓ２であることを特徴とする請求項１に記載のステッピングモータ。  The position where the first magnetic pole part faces the magnet is on the outer peripheral surface side with respect to the position where the third magnetic pole part faces the magnet, and the area where the first magnetic pole part faces the magnet. The stepping motor according to claim 1, wherein S1 <S2 where S1 is an area where the third magnetic pole portion faces the magnet and S2. 前記第１の磁極部或いは前記第３の磁極部は、前記マグネットの中心軸方向と直交する平面に所定の隙間をもって対向し、マグネットの半径方向に延出する複数の櫛歯形状より構成されることを特徴とする請求項１から３に記載のステッピングモータ。  The first magnetic pole part or the third magnetic pole part is configured by a plurality of comb-like shapes that face a plane perpendicular to the central axis direction of the magnet with a predetermined gap and extend in the radial direction of the magnet. The stepping motor according to claim 1, wherein the stepping motor is provided.
JP2002008525A 2001-09-28 2002-01-17 Stepping motor Expired - Fee Related JP4006234B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2002008525A JP4006234B2 (en) 2002-01-17 2002-01-17 Stepping motor
US10/252,376 US6897579B2 (en) 2001-09-28 2002-09-24 Motor
CNB021433844A CN100454728C (en) 2001-09-28 2002-09-26 Motor
MYPI20023592A MY130614A (en) 2001-09-28 2002-09-26 Motor
KR10-2002-0059048A KR100495352B1 (en) 2001-09-28 2002-09-28 Motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002008525A JP4006234B2 (en) 2002-01-17 2002-01-17 Stepping motor

Publications (3)

Publication Number Publication Date
JP2003219623A JP2003219623A (en) 2003-07-31
JP2003219623A5 true JP2003219623A5 (en) 2005-07-21
JP4006234B2 JP4006234B2 (en) 2007-11-14

Family

ID=27646763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002008525A Expired - Fee Related JP4006234B2 (en) 2001-09-28 2002-01-17 Stepping motor

Country Status (1)

Country Link
JP (1) JP4006234B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4637537B2 (en) * 2004-09-22 2011-02-23 富士フイルム株式会社 Lens driving device and digital camera
JP4455407B2 (en) 2005-05-31 2010-04-21 キヤノン株式会社 Drive device
JP2007047528A (en) * 2005-08-11 2007-02-22 Namiki Precision Jewel Co Ltd Autofocus lens driving actuator for personal digital assistant camera
WO2021192723A1 (en) * 2020-03-26 2021-09-30 ソニーグループ株式会社 Blade opening/closing device, interchangeable lens, and imaging device

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