Damping device for rotating members
AssigneeKonica Corporation
InventorsTadashi Miwa, Toru Makino, Ken Nonaka
Life of this patent
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Abstract
A proper frequency of a driving system is shifted to a high frequency side by increasing the rigidity of a photoreceptor drum or the proper frequency of the driving system is shifted to a low frequency side by reducing the rigidity of the photoreceptor drum so that the proper frequency of the driving system is made so as not to conform with a frequency of a speed fluctuation component transmitted to the driving system. With this construction, the photoreceptor drum is prevented from causing the resonance and the speed fluctuation is reduced so that an image quality can be improved.
Claims11
An apparatus in an image forming device, for rotating a rotation member having a given length in an axial direction, comprising:
- a shaft provided at an axis of said rotation member, for rotating said rotation member, said rotation member and said shaft constituting a driven system;
- a driving source;
- a transmitting member for transmitting a driving force from said driving source to said shaft, said transmitting member including tooth members engaging with each other to transmit driving force, said driving source and said transmitting member constituting a driving system;
- and
- said driven system and said driving system being constructed whereby a natural frequency of said driven system is lower than a frequency of a primary variable component under 150 Hz or is higher than said frequency of said primary variable component under 150 Hz, wherein said frequency of said primary component is caused per one rotation of said driving system and per engagement of one tooth of each of said tooth members.
The apparatus of clam 1, wherein said rotation member is a driving roller which rotates a belt-type photoreceptor.
Dependencies are inferred from the claim text.