JPH0264957U

JPH0264957U -

Info

Publication number: JPH0264957U
Application number: JP14304988U
Authority: JP
Priority date: 1988-11-01
Filing date: 1988-11-01
Publication date: 1990-05-16

Description

[Brief explanation of drawings]

第１図は本実施例の支持構造を用いてコロナ帯
電器をドラムユニツトに装着した状態を示す要部
の側面図、第２図ａは本実施例の支持構造を用い
てコロナ帯電器をドラムユニツトに装着する初期
状態を示す正面断面図、第２図ｂは本実施例の支
持構造を用いてコロナ帯電器をドラムユニツトに
装着した状態を示す正面断面図、第３図は本実施
例の支持構造を用いてコロナ帯電器をドラムユニ
ツトに装着した状態の斜視図、第４図は本実施例
の支持構造を用いたコロナ帯電器を備えたドラム
ユニツトを内部にセツトした画像形成装置の構成
図、第５図ａは従来例の支持構造を示すコロナ帯
電器とドラムユニツトの正面断面図、第５図ｂは
第５図ａに示す支持構造によつて装着されたコロ
ナ帯電器とドラムユニツトの正面断面図、第６図
は従来例の支持構造におけるコロナ帯電器側の構
成を示し、コロナ帯電器の上下を反転して示す斜
視図である。１３……感光ドラム、１９……電極ブロツク、
２１……制御グリツド、２２，２３……フツク、
２４……ドラムユニツト、２５……支持部材、２
５ａ……円弧面、２６，２７……係合穴。 Fig. 1 is a side view of the main parts of the corona charger mounted on the drum unit using the support structure of this embodiment, and Fig. 2a is a side view of the corona charger mounted on the drum unit using the support structure of this embodiment. FIG. 2b is a front sectional view showing the state in which the corona charger is mounted on the drum unit using the support structure of this embodiment, and FIG. A perspective view of a state in which a corona charger is attached to a drum unit using a support structure, and FIG. 4 is a configuration of an image forming apparatus in which a drum unit equipped with a corona charger using the support structure of this embodiment is set inside. Figure 5a is a front sectional view of the corona charger and drum unit showing a conventional support structure, and Figure 5b is a front sectional view of the corona charger and drum unit mounted by the support structure shown in Figure 5a. FIG. 6 is a front sectional view showing the configuration of the corona charger side in the conventional support structure, and is a perspective view showing the corona charger upside down. 13...Photosensitive drum, 19...Electrode block,
21... Control grid, 22, 23... Hook,
24...Drum unit, 25...Support member, 2
5a...Circular surface, 26, 27...Engagement hole.

Claims

[Scope of Claim for Utility Model Registration] (1) A corona charger with a corona wire stretched inside a longitudinally formed shield case and a control grid provided in an opening at the bottom of the case is used as a support member for supporting a photoreceptor drum. In the support structure of the corona charger to be attached, elastic hooks are provided at both ends of the shield case toward the opening side, engagement holes are provided in the support member with which the hooks can respectively engage, and A support member is provided with an arcuate surface that is concentric with the photoreceptor drum and is in contact with the control grid, and the corona charger can be attached to the support member by engagement with the hook and the engagement hole. A support structure for a corona charger characterized by the following. (2) When the corona charger is attached to the support member, the control grid provided in the corona charger is connected to the photoreceptor drum through the arcuate surface formed on the support member. 2. The support structure for a corona charger according to claim 1, wherein the support structure is curved along a surface.