Invention Grant
- Patent Title: Driving device
- Patent Title (中): 驱动装置
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Application No.: US12296321Application Date: 2007-04-10
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Publication No.: US08026688B2Publication Date: 2011-09-27
- Inventor: Ryuichi Yoshida , Hirohisa Sueyoshi , Satoshi Shinke , Shinichi Yamamoto
- Applicant: Ryuichi Yoshida , Hirohisa Sueyoshi , Satoshi Shinke , Shinichi Yamamoto
- Applicant Address: JP Hachioji-shi
- Assignee: Konica Minolta Opto, Inc.
- Current Assignee: Konica Minolta Opto, Inc.
- Current Assignee Address: JP Hachioji-shi
- Agency: Sidley Austin LLP
- Priority: JP2006-108275 20060411
- International Application: PCT/JP2007/057873 WO 20070410
- International Announcement: WO2007/119713 WO 20071025
- Main IPC: H02N2/02
- IPC: H02N2/02

Abstract:
In order to provide a driving device that is capable of eliminating sticking of a movable member due to nonuse, the driving device includes a drive shaft that reciprocates in axial directions with expansion and contraction of an electromechanical transducer element, a movable member that frictionally engages with the drive shaft, and a drive circuit that inputs drive voltage into the electromechanical transducer element, the drive circuit outputting drive operation pattern voltage having a frequency (fd1′) lower than a resonance frequency (fr) of the electromechanical transducer element and lower than a frequency (fd1) that maximizes moving velocity of the movable member and sticking elimination pattern voltage having a frequency lower than the frequency (fd1′) of the drive operation pattern voltage and in vicinity of a frequency (fd2) that maximizes thrust acting on the movable member.
Public/Granted literature
- US20090160372A1 DRIVING DEVICE Public/Granted day:2009-06-25
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