JP2012194210A5

JP2012194210A5 -

Info

Publication number: JP2012194210A5
Application number: JP2011056034A
Authority: JP
Filing date: 2011-03-15
Publication date: 2014-05-08
Anticipated expiration: 2031-03-15

Description

上記目的を達成するための本発明に係る画像形成装置の代表的な構成は、駆動源から駆動力が伝達されて回転するギアと、前記ギアから駆動力が伝達され、前記ギアと同軸で回転可能な軸部材と、前記軸部材を回転可能に支持する軸支持部と、を有し、前記軸部材に設けられた係合部と、装置本体に装着されたカートリッジの被係合部とが係合した状態で前記駆動源から駆動力を伝達して前記被係合部を回転させることでシート材へ画像形成を行う画像形成装置において、前記ギアを回転可能に支持する前記軸部材とは別のギア支持部を有することを特徴とする。 Typical configuration of an image forming apparatus according to the present invention for achieving the above object, a gear that rotates being transmitted driving force from a driving source, the driving force is transmitted from said gear, rotated by the gear coaxially a shaft member capable, anda shaft support portion that rotatably supports the shaft member, and the engaging portion provided on the shaft member, and the engaged portion of the cartridge mounted in the apparatus main body In the image forming apparatus that forms an image on a sheet material by transmitting a driving force from the driving source in an engaged state and rotating the engaged portion, the shaft member that rotatably supports the gear. It has another gear support part .

上記構成によれば、駆動源から駆動力が伝達されて回転するギアを回転可能に支持するギア支持部が、前記ギアから駆動力が伝達され、前記ギアと同軸で回転可能な軸部材とは別部材で構成される。そのためカートリッジを装置本体に挿入して装着する際、装置本体に備えられた軸部材と、カートリッジに備えられたカップリング軸との間で、軸中心がずれた場合でも、前記ギアの回転に対して前記軸部材の軸ずれによる影響が減少する。そのため前記ギアの回転ムラの要因である振れを防止することができ、画質の向上につながる。 According to the above configuration, the gear support portion that rotatably supports the gear that rotates when the driving force is transmitted from the driving source is the shaft member that can transmit the driving force from the gear and can rotate coaxially with the gear. Consists of separate members . When mounting the other Me cartridges device is inserted into the body, a shaft member provided in the apparatus main body, between a coupling shaft provided in the cartridges, even if the axial center is shifted, the formic The influence of the axial displacement of the shaft member is reduced with respect to the rotation of a. Therefore it is possible to prevent the vibration is a factor of the rotation unevenness of the gears, leading to improved image quality.

Claims

A gear that rotates when a driving force is transmitted from a driving source ;
A driving force is transmitted from the gear, and a shaft member that can rotate coaxially with the gear ;
A shaft support portion for rotatably supporting the shaft member ;
Have
A driving force is transmitted from the driving source to rotate the engaged portion in a state where the engaging portion provided on the shaft member is engaged with the engaged portion of the cartridge mounted on the apparatus main body. In an image forming apparatus for forming an image on a sheet material,
An image forming apparatus, comprising: a gear support portion different from the shaft member that rotatably supports the gear .

The gear support portion, an image forming apparatus according to claim 1, wherein the cylindrical portion shaped portion der Rukoto.

The portion of the gear support portion that supports the gear is located at a position different from the portion of the shaft support portion that supports the shaft member with respect to the axial direction of the shaft member. The image forming apparatus described in 1 .

A pin for transmitting a driving force from the gear to the shaft member;
The image according to any one of claims 1 to 3, wherein a driving force is transmitted from the gear to the shaft member in a state in which a longitudinal direction of the pin intersects an axial direction of the shaft member. Forming equipment .

A main body frame constituting the apparatus main body;
A bearing member fixed to the main body frame and provided with a part of the gear support and the shaft support;
The image forming apparatus according to claim 1, further comprising:

The image forming apparatus according to claim 5, further comprising a member that is fixed to the main body frame and is different from the bearing member including another part of the shaft support portion .

The driving force from the driving source can be transmitted from the engaging portion to the engaged portion in a state where the engaging portion of the shaft member and the engaged portion are not coaxial. Item 7. The image forming apparatus according to any one of Items 1 to 6 .

The image forming apparatus according to claim 1, wherein the cartridge is attached to the apparatus main body by moving in a direction intersecting an axial direction of the shaft member .

The image forming apparatus according to claim 1, wherein the engaged portion is swingable with respect to a main body of the cartridge .