GEAR, ROTARY MEMBER, PROCESS CARTRIDGE AND IMAGE FORMING DEVICE

PURPOSE:To restrain deformation of a gear by arranging a hollow part inside of a thick part in the gear whose flange gear is composed of a resin material by injection molding and which is arranged on a cylindrical member in an image forming device by adopting a process cartridge system. CONSTITUTION...

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Bibliographic Details
Main Authors TSUDA TADAYUKI, OGUMA TORU
Format Patent
LanguageEnglish
Published 18.04.1995
Edition6
Subjects
BLASTING
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
HOLOGRAPHY
LIGHTING
MAGNETOGRAPHY
MECHANICAL ENGINEERING
PHOTOGRAPHY
PHYSICS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:PURPOSE:To restrain deformation of a gear by arranging a hollow part inside of a thick part in the gear whose flange gear is composed of a resin material by injection molding and which is arranged on a cylindrical member in an image forming device by adopting a process cartridge system. CONSTITUTION:In a photoreceptor drum 8 of an image forming device in which a process cartridge is installed, an organic photoreceptor 8b being a photosensitive layer is applied to an outer peripheral surface of a drum base body 8a composed of cylindrical aluminium, and a flange gear 8c having a hollow part 8c2 inside of a thick part 8c1 is fixed to one end of the drum 8. When driving force is transmitted to this flange gear 8c, the photoreceptor drum 8 is rotated. In this case, the flange gear 8c is formed so that the hollow part 8c2 is arranged inside of the thick part 8c1 by using the so-called pressurized gas injection system by which pressurized gas is injected into resin after melting resin is injected into a metal mold. Thereby, strength in the radial direction of the gear is heightened.
Bibliography:Application Number: JP19930250364