Image forming apparatus and driving apparatus for image forming means used in the image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorKunihiko Kitayama
Life of this patent
Estimating the term…
Abstract
An image forming apparatus having an image forming portion for forming an image, a drive source for generating a driving force for driving the image forming portion, a drive gear for transmitting the driving force from the drive source, a drive shaft for transmitting the driving force to the image forming portion, a first gear and a second gear fitted to the drive shaft and meshing with the drive gear, and a biasing member engaged with the first gear and the second gear and capable of circumferentially biasing the two, wherein in a state in which the first gear and the second gear mesh with the drive gear, it is possible to change over the biasing member to a biasing state and a bias releasing state.
Claims26
A driving apparatus for driving image forming means used in an image forming apparatus, comprising:
- a drive source for generating a driving force;
- a drive transmitting gear for transmitting the driving force;
- a first gear and a second gear meshing with said drive transmitting gear;
- and
- biasing means engaged with said first gear and said second gear for circumferentially biasing said first gear and said second gear,
- wherein one end portion of said biasing means is engaged with said first gear, and an other end portion of said biasing means is moved between an engagement portion and an engagement releasing portion provided in said second gear, so that said biasing means is changed over between a biasing state and a bias releasing state, and
- wherein said second gear is provided with a projected portion for preventing said other end portion of said biasing means from moving from said engagement portion to said engagement releasing portion when said biasing means is in the biasing state.
An image forming apparatus comprising:
- image forming means for forming an image;
- a drive source for generating a driving force for driving said image forming means;
- a drive transmitting gear for transmitting the driving force;
- a first gear and a second gear meshing with said drive transmitting gear;
- and
- biasing means engaged with said first gear and said second gear for circumferentially biasing said first gear and said second gear,
- wherein one end portion of said biasing means is engaged with said first gear, and an other end portion of said biasing means is moved between an engagement portion and an engagement releasing portion provided in said second gear, so that said biasing means is changed over between a biasing state and a bias releasing state, and
- wherein said second gear is provided with a projected portion for preventing said other end portion of said biasing means from moving from said engagement portion to said engagement releasing portion when said biasing means is in the biasing state.
Dependencies are inferred from the claim text.