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US 8,301,058 B2Granted
Developing unit and image forming apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorYoung Chae Kim
Life of this patent
Estimating the term…
Abstract
A developing unit and an image forming apparatus having the same. The developing unit includes a controlling unit to restrict a contact position between the charging roller and a photosensitive body, thereby preventing deformation of the charging roller caused when the developing unit is not used for a long period of time.
Claims22
A developing unit comprising:
- a housing including a first fixing portion;
- a photosensitive body arranged in the housing;
- a roller arranged in the housing to come into contact with the photosensitive body;
- and
- a controlling unit installed in the housing, and including a controlling member to seat and support the roller and to keep the roller at a first position spaced apart from the photosensitive body based on the first fixing portion, and including an elastic member to elastically support and push the controlling member toward the photosensitive body such that when a predetermined external force is applied to the controlling unit, the roller moves to a second position to allow the roller to come into contact with the photosensitive body.
2 more elements
An image forming apparatus having a developing unit detachably installed in a body to form an image on a printing medium supplied via a paper supply unit, the developing unit comprising:
- a housing and a photosensitive body arranged in the body to be electrically charged by a charging roller;
- and
- a controlling unit received by the housing to restrict contact between the charging roller and the photosensitive body, and including a controlling member to seat and support the charging roller and an elastic member to elastically support and push the controlling member toward the photosensitive body, and including a controlling member mount to movably support the controlling member, the controlling member mount including a first fixing portion to fix the controlling member to position the charging roller apart from the photosensitive body and a second fixing portion to restrict a contact position between the charging roller and the photosensitive body.
Dependencies are inferred from the claim text.