JPH0485457U

JPH0485457U -

Info

Publication number: JPH0485457U
Application number: JP12825290U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-24
Anticipated expiration: 2005-11-30
Also published as: JP2538012Y2

Description

[Brief explanation of the drawing]

第１図は本考案のシール構造の現像器ユニツト
とシール部材の概略斜視図、第２図は本考案のシ
ール部材を装着した現像器ユニツトの一部省略正
面図、第３図は本考案のシール部材を装着した現
像器ユニツトの要部の一部省略側断面図、第４図
は本考案のシール部材の他の構成例を示す図で、
ａは裏面図、ｂは側断面図、第５図は本考案のシ
ール部材の更に他の構成例を示す図で、ａは裏面
図、ｂは側断面図、第６図は画像形成装置の一例
の全体構成を示す概略側面図、第７図は従来例の
シール部材である梱包材と現像器ユニツトの概略
斜視図である。１……現像器ケーシング、１ａ……現像器ケー
シングの開口部、１ｂ……開口部の上縁、１ｃ…
…開口部の下縁、１ｄ，１ｅ……間隙、２……現
像スリーブ、２ａ……現像スリーブの露出周面、
３……ドクターブレード、４……シール部材、４
ａ……シール部材のカバー部、４ｄ，４ｅ……シ
ール部材の弾性突条部、５……現像剤。 Fig. 1 is a schematic perspective view of a developing unit with a seal structure of the present invention and a sealing member, Fig. 2 is a partially omitted front view of a developing unit equipped with a sealing member of the present invention, and Fig. 3 is a schematic perspective view of a developing unit with a sealing structure of the present invention. FIG. 4 is a partially omitted side sectional view of the main parts of the developing device unit equipped with the sealing member, and is a diagram showing another example of the structure of the sealing member of the present invention.
a is a back view, b is a side sectional view, FIG. 5 is a diagram showing still another configuration example of the sealing member of the present invention, a is a back view, b is a side sectional view, and FIG. 6 is a view of the image forming apparatus. FIG. 7 is a schematic side view showing the overall configuration of an example, and FIG. 7 is a schematic perspective view of a packaging material that is a sealing member and a developing device unit in a conventional example. DESCRIPTION OF SYMBOLS 1...Developer casing, 1a...Opening of developer casing, 1b...Upper edge of opening, 1c...
...lower edge of opening, 1d, 1e... gap, 2... developing sleeve, 2a... exposed peripheral surface of developing sleeve,
3...Doctor blade, 4...Seal member, 4
a... Cover portion of the sealing member, 4d, 4e... Elastic protruding portion of the sealing member, 5... Developer.

Claims

[Scope of claim for utility model registration] A developer casing that houses a developer therein;
A sealing structure that includes a developing sleeve that encloses a magnetized member and exposes a part of its circumferential surface from an opening of the developing device casing, and seals an exposed portion of a developing device unit that is detachably attached to an apparatus main body with a sealing member. The sealing member includes a cover portion having a shape corresponding to the exposed peripheral surface of the developing sleeve and having a magnetic material in at least a portion thereof, and an upper edge of the opening of the developing device casing attached to the upper and lower ends of the cover portion. and an elastic protrusion inserted into the gap formed by the lower edge and the exposed circumferential surface of the developing sleeve, and the exposed circumferential surface of the developing sleeve is A sealing structure for an exposed part of a developing unit, characterized in that it is attached and held in a developing unit.