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Title:
IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2011048284
Kind Code:
A
Abstract:

To provide an image forming apparatus which can reduce noise due to meshing frequency of a driving source even when a motor of an FG output method is a driving source in the image forming apparatus having high speed and low speed modes.

In a high speed mode, a driving gear 5 that is fixed to a rotational shaft of the motor of the FG output method is rotated in a clockwise direction, a rocking gear 17 is moved along a guide groove 43 to be engaged with a reduction gear 21 and a drum gear 23 that is integrated to a photoreceptor drum for magenta is rotated. In a low speed mode, the driving gear 5 is rotated in the counter-clockwise direction, the rocking gear 19 is engaged with the reduction gear 22 and the drum gear 23 is rotated at low speed. The high speed and the low speed can be switched in a state where the rotational speed is a constantly controllable by varying the rotating direction of the motor.


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Inventors:
FUKUSHIMA TATSUO
KUMADA KATSUMI
KITA NOBUHIKO
KONUMA KIYOSHI
Application Number:
JP2009198660A
Publication Date:
March 10, 2011
Filing Date:
August 28, 2009
Export Citation:
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Assignee:
RICOH CO LTD
International Classes:
G03G15/00; G03G21/00; G03G21/16; H02P29/00
Domestic Patent References:
JP2003107823A2003-04-09
JP2008035643A2008-02-14
JP2008225206A2008-09-25
JP2009104001A2009-05-14
JP2009293795A2009-12-17
JP2010002436A2010-01-07
JP2000221858A2000-08-11
JPH08175686A1996-07-09
JPH09307702A1997-11-28
JP2007017777A2007-01-25
JP2004067388A2004-03-04
JPH0535051A1993-02-12
JPH10232163A1998-09-02
JP2002257621A2002-09-11
JPS5779256U1982-05-15
JPS63120936A1988-05-25
JPS63120937A1988-05-25
JPH1113643A1999-01-19
JP2001182670A2001-07-06
JP2007078142A2007-03-29
JP2003107823A2003-04-09
JP2008035643A2008-02-14
JP2008225206A2008-09-25
JP2009104001A2009-05-14
JP2009293795A2009-12-17
JP2010002436A2010-01-07
JPH01201853A1989-08-14
JP2005350251A2005-12-22
Foreign References:
US5729779A1998-03-17
US20080217834A12008-09-11
US20090035041A12009-02-05
US5729779A1998-03-17
US20080217834A12008-09-11
US20090035041A12009-02-05
Attorney, Agent or Firm:
Shogo Honda
Toru Kabayama



 
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