JPH0267363U

JPH0267363U -

Info

Publication number: JPH0267363U
Application number: JP14646988U
Authority: JP
Priority date: 1988-11-08
Filing date: 1988-11-08
Publication date: 1990-05-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例である現像装置１を
レーザプリンタ２に装着した場合の縦断面図、第
２図は現像装置１および感光体ドラム３まわりの
構成を示す図、第３図は現像装置１の一部断面を
示す斜視図、第４図は現像装置本体４１の一方側
から見た側面図、第５図は第４図の分解斜視図、
第６図は現像装置本体４１の他方側から見た側面
図、第７図は第６図の分解斜視図、第８図は現像
装置１に取付けられる現像ローラ１９の断面図、
第９図は現像ローラ１９の感光体ドラム３の配設
関係を示した図、第１０図は現像装置１の蓋４２
の底面４２ｂから見た斜視図、第１１図は蓋４２
の下レジストローラ３２が取付けられた側から見
た正面図、第１２図は下レジストローラ３２が取
付けられた蓋４２の一部を示す斜視図、第１３図
は現像装置１の蓋４２、カバー体３８、上レジス
トローラ３１および下レジストローラ３２の分解
斜視図、第１４図は本考案の他の実施例である現
像装置１の現像ローラ１９へ電圧を印加する構成
を説明するための図である。１……現像装置、２……レーザプリンタ、３…
…感光体ドラム、１８……主コロナ帯電器、１９
……現像ローラ、２３……コロナ帯電器、３１…
…上レジストローラ、３２……下レジストローラ
、３８……カバー体、３９……突起、４１……現
像装置本体、４２……蓋、４３ａ，４３ｂ……支
持部材、４４ｂ，４４ｂ，９４……ねじりばね、
４７……穂切部材、４８ａ，４８ｂ……板ばね、
４９……シート体、５０，５１……摺動片、５２
ａ，５２ｂ……支持筒、５９ａ，５９ｂ……支持
ローラ、６０ａ，６０ｂ……ばね受ローラ、６３
……スリーブ、６４……永久磁石片、７２……マ
グネツトローラ、Ｄ１……スリーブ６３の直径、
Ｄ２……支持ローラ５９ａ，５９ｂの直径、ｄ１
……マグネツトローラ７２の軸６５の直径、ｄ２
……端部材６６，６７の軸受６６ｂ，７３の内径
、Ｑ……支持部材４３ａ，４３ｂの回転軸線、△
……感光体ドラム３と現像ローラ１９との間隔。 FIG. 1 is a longitudinal sectional view of a developing device 1 according to an embodiment of the present invention installed in a laser printer 2, FIG. 2 is a diagram showing the configuration around the developing device 1 and the photosensitive drum 3, and FIG. is a perspective view showing a partial cross section of the developing device 1, FIG. 4 is a side view of the developing device main body 41 seen from one side, FIG. 5 is an exploded perspective view of FIG. 4,
6 is a side view of the developing device main body 41 seen from the other side, FIG. 7 is an exploded perspective view of FIG. 6, and FIG. 8 is a sectional view of the developing roller 19 attached to the developing device 1.
FIG. 9 is a diagram showing the arrangement relationship of the photosensitive drum 3 of the developing roller 19, and FIG.
11 is a perspective view of the lid 42 as seen from the bottom surface 42b of the lid 42.
12 is a perspective view showing a part of the lid 42 to which the lower registration roller 32 is attached, and FIG. 13 is a front view showing the lid 42 and cover of the developing device 1. FIG. 14 is an exploded perspective view of the body 38, the upper registration roller 31, and the lower registration roller 32, and is a diagram for explaining a configuration for applying voltage to the developing roller 19 of the developing device 1, which is another embodiment of the present invention. be. 1...Developing device, 2...Laser printer, 3...
...Photosensitive drum, 18...Main corona charger, 19
...Developing roller, 23...Corona charger, 31...
. . . Upper registration roller, 32 . . . Lower registration roller, 38 . torsion spring,
47... Ear cutting member, 48a, 48b... Leaf spring,
49... Sheet body, 50, 51... Sliding piece, 52
a, 52b...Support tube, 59a, 59b...Support roller, 60a, 60b...Spring receiving roller, 63
... Sleeve, 64 ... Permanent magnet piece, 72 ... Magnet roller, D1 ... Diameter of sleeve 63,
D2...Diameter of support rollers 59a, 59b, d1
...The diameter of the shaft 65 of the magnet roller 72, d2
...Inner diameter of bearings 66b, 73 of end members 66, 67, Q...Rotation axis of support members 43a, 43b, △
... Distance between the photosensitive drum 3 and the developing roller 19.

Claims

[Scope of Claim for Utility Model Registration] In a developing device that uses a developing roller to apply a developer to a photoreceptor on which an electrostatic latent image is formed and visualize it, the developing roller is provided with a portion of the developing roller facing outward in the circumferential direction. A flexible material that hangs down toward the developing roller from a peripheral edge portion of the casing surrounding the developing roller on the upper side of the developing roller. A developing device characterized by being provided with a scattering prevention member consisting of: