Invention Grant
US07671884B2 Rotary drive apparatus, optical scan apparatus, and image formation apparatus
有权
旋转驱动装置，光学扫描装置和图像形成装置
- Patent Title: Rotary drive apparatus, optical scan apparatus, and image formation apparatus
- Patent Title (中): 旋转驱动装置，光学扫描装置和图像形成装置
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Application No.: US12071578Application Date: 2008-02-22
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Publication No.: US07671884B2Publication Date: 2010-03-02
- Inventor: Yukio Itami , Kensuke Masuda , Yoshihiro Takahashi , Tomotaka Takamura
- Applicant: Yukio Itami , Kensuke Masuda , Yoshihiro Takahashi , Tomotaka Takamura
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2007-046276 20070226
- Main IPC: B41J27/00
- IPC: B41J27/00
Abstract:
A rotary drive apparatus includes a rotary body with a support portion, a rotor magnet supported by the support portion of the rotary body, a fixation section facing the rotor magnet and rotatably supporting the rotary body, and a winding coil provided in the fixation section, in which an expression E1/E2≦0.75 is satisfied where Young's modulus of the rotor magnet is E1 [GPa], and Young's modulus of the support portion is E2 [GPa].
Public/Granted literature
- US20080204539A1 Rotary drive apparatus, optical scan apparatus, and image formation apparatus Public/Granted day:2008-08-28
Information query
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