JPH0351443U

JPH0351443U -

Info

Publication number: JPH0351443U
Application number: JP11199689U
Authority: JP
Priority date: 1989-09-25
Filing date: 1989-09-25
Publication date: 1991-05-20

Description

[Brief explanation of drawings]

第１図は感光体ドラムの側部にフライホイール
を配置する場合の正面図、第２図はフライホイー
ルの構成と作用とを示すもので、同図ａはフライ
ホイールのコピー開始時の縦断面図、ｂはその横
断面図、ｃはコピー動作中の縦断面図、ｄはその
横断面図、第３図は本考案の別の実施例を示すも
ので、同図ａは感光体ドラムのコピー開始時の横
断面図、ｂはその縦断面図、ｃはコピー動作中の
横断面図、ｄはその縦断面図、第４図は感光体ド
ラムの内部にウエイト部材を設けた場合の例を示
すもので、同図ａは感光体ドラムのコピー開始時
の横断面図、ｂはその縦断面図、ｃはコピー動作
中の横断面図、ｄはその縦断面図、ｅはコピー開
始時のウエイト部材の拡大説明図、ｆはコピー動
作中のウエイト部材の動きを示す拡大説明図、第
５図は第２図と同様な手段を感光体ドラムに組込
んだ場合を示すもので、同図ａはコピー開始時の
感光体ドラムの横断面図、ｂはその縦断面図、ｃ
はコピー動作中の横断面図、ｄはその縦断面図、
第６図はＤＣモータの駆動トルクと電流との関係
を示すグラフであり、第７図はＤＣモータのトル
クと、回転数、電流との関係を示すグラフである
。図中の符号、１……感光体ドラム、２……駆動
軸、１０……フライホイール、１１……外側電磁
石、１２……内側電磁石、１４……キヤリヤ、１
５……コイルスプリング状部材、１６……板バネ
、１７……スライダー、２０……ウエイト部材、
２１……ウエイト、２２……板バネ、２５……外
側電磁石、２６……内側電磁石、２７……キヤリ
ヤ。 Figure 1 is a front view when the flywheel is placed on the side of the photoreceptor drum, Figure 2 shows the structure and function of the flywheel, and Figure a is a longitudinal cross-section of the flywheel when copying starts. In the figures, b is a cross-sectional view thereof, c is a longitudinal cross-sectional view during copying operation, d is a cross-sectional view thereof, Fig. 3 shows another embodiment of the present invention, and Fig. 3a shows a photosensitive drum. A cross-sectional view at the start of copying, b is a vertical cross-sectional view, c is a cross-sectional view during copying operation, d is a vertical cross-sectional view, and FIG. 4 is an example of a case where a weight member is provided inside the photosensitive drum. In the figure, a is a cross-sectional view of the photosensitive drum when copying starts, b is a vertical cross-sectional view thereof, c is a cross-sectional view during copying operation, d is a vertical cross-sectional view thereof, and e is a vertical cross-sectional view of the photosensitive drum at the time of starting copying. f is an enlarged explanatory view showing the movement of the weight member during the copying operation, and Fig. 5 shows a case where the same means as in Fig. 2 is incorporated into the photosensitive drum. Figure a is a cross-sectional view of the photosensitive drum at the start of copying, b is its longitudinal cross-sectional view, and c
is a cross-sectional view during copying operation, d is a vertical cross-sectional view thereof,
FIG. 6 is a graph showing the relationship between the drive torque and current of the DC motor, and FIG. 7 is a graph showing the relationship between the torque, rotation speed, and current of the DC motor. Symbols in the diagram: 1...Photosensitive drum, 2...Drive shaft, 10...Flywheel, 11...Outer electromagnet, 12...Inner electromagnet, 14...Carrier, 1
5... Coil spring-like member, 16... Leaf spring, 17... Slider, 20... Weight member,
21... Weight, 22... Leaf spring, 25... Outer electromagnet, 26... Inner electromagnet, 27... Carrier.

Claims

[Claims for Utility Model Registration] An image forming apparatus configured to form a toner image on a photoreceptor drum and transfer the toner image onto paper to create recording paper, comprising: a drive shaft for the photoreceptor drum; In contrast, it is proposed to provide a rotation means that has a small moment of inertia at the start of copying and a large moment of inertia during the copying operation, so that the number of rotations of the photosensitive drum can be maintained constant during the copying operation. A photosensitive drum rotation unevenness control device for an image forming apparatus.