JPH0127423B2 - - Google Patents
Info
- Publication number
- JPH0127423B2 JPH0127423B2 JP2254380A JP2254380A JPH0127423B2 JP H0127423 B2 JPH0127423 B2 JP H0127423B2 JP 2254380 A JP2254380 A JP 2254380A JP 2254380 A JP2254380 A JP 2254380A JP H0127423 B2 JPH0127423 B2 JP H0127423B2
- Authority
- JP
- Japan
- Prior art keywords
- developing sleeve
- magnet roller
- conductive
- bias voltage
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
- G03G15/0907—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with bias voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing For Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、電子写真複写機の磁気ブラシ式現像
装置を構成する導電性の現像スリーブに所定のバ
イアス電圧を安定して印加することのできる現像
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device capable of stably applying a predetermined bias voltage to a conductive developing sleeve constituting a magnetic brush type developing device of an electrophotographic copying machine.
以下、本発明を図示の実施例に基いて説明す
る。 Hereinafter, the present invention will be explained based on illustrated embodiments.
図面において、１ａ，１ｂは側板、２はアルミ
ニウムのごとき導電性材料で形成された現像スリ
ーブであり、これは導電性の軸受３を介して一端
にギア４が設けられ、外部駆動源（図示せず）に
よつて回転されるように側板１ａ，１ｂに保持さ
れている。２ａは現像スリーブ２の端部に設けら
れたアルミニウム等の導電性材料から形成された
フランジであり、その内部に軸受６を保持してい
る。５は前記現像スリーブ２の内部に設けられた
複数の永久磁石（または着磁部）を備えたマグネ
ツトロールで、現像スリーブ２とは導電性フラン
ジ２ａと軸受６を介して相互に回動可能となつて
おり、かつ、一端軸７に調整つまみ８を設けて手
動で任意に回転可能となしているが、通常のコピ
ー動作中は、この調整つまみ８を側板１ｂに固定
して回転しないようにしている。そして、他方の
金属製マグネツトロール軸９は現像スリーブ２の
軸心を貫通して外部に引き出され、その先端部に
はブラケツト１０の一端に設けた導電性のガイド
ボス１１が挿入されている。上記ブラケツト１０
の他端は側板１ａに固定されており、該ブラケツ
ト１０に軸方向へ移動可能に保持され、かつコイ
ル状圧縮ばね１２で移動付勢された導電性の押圧
ピン１３がガイドボス１１の側面よりマグネツト
ロール軸９に圧接している。１４は前記押圧ピン
に接続したバイアス電圧印加用のリード線であ
る。これにより、バイアス電圧をリード線１４か
ら押圧ピン１３を介してマグネツトロール軸９に
与え、さらに軸受６と導電性フランジ２ａを介し
て現像スリーブ２に与えることができる。 In the drawing, 1a and 1b are side plates, 2 is a developing sleeve made of a conductive material such as aluminum, and this is equipped with a gear 4 at one end via a conductive bearing 3, and is connected to an external drive source (not shown). It is held on the side plates 1a, 1b so as to be rotated by the Reference numeral 2a denotes a flange formed from a conductive material such as aluminum, provided at the end of the developing sleeve 2, and holds the bearing 6 inside. 5 is a magnet roll provided with a plurality of permanent magnets (or magnetized parts) provided inside the developing sleeve 2, and is rotatable with respect to the developing sleeve 2 via a conductive flange 2a and a bearing 6. In addition, an adjustment knob 8 is provided on one end of the shaft 7 so that it can be manually rotated as desired; however, during normal copying operations, this adjustment knob 8 is fixed to the side plate 1b to prevent it from rotating. I have to. The other metal magnet roll shaft 9 passes through the axis of the developing sleeve 2 and is pulled out to the outside, and a conductive guide boss 11 provided at one end of the bracket 10 is inserted into its tip. . Bracket 10 above
The other end is fixed to the side plate 1a, and a conductive pressing pin 13, which is held movably in the axial direction by the bracket 10 and is biased to move by a coiled compression spring 12, is inserted from the side surface of the guide boss 11. It is in pressure contact with the magnet roll shaft 9. 14 is a lead wire for applying a bias voltage connected to the pressing pin. Thereby, a bias voltage can be applied from the lead wire 14 to the magnet roll shaft 9 via the press pin 13, and further to the developing sleeve 2 via the bearing 6 and the conductive flange 2a.
以上の説明から明らかなように本発明によれ
ば、固定されたマグネツトロール軸に押圧ピンを
常時押圧した状態でバイアス電圧を印加すること
ができるため、常時安定したバイアス電圧を現像
スリーブに印加でき、また、接点が消耗しないの
で接点部品の交換の手間が省けるといつたすぐれ
た特長を有するものである。 As is clear from the above description, according to the present invention, the bias voltage can be applied with the pressing pin constantly pressed against the fixed magnet roll shaft, so that a stable bias voltage can always be applied to the developing sleeve. Moreover, since the contacts do not wear out, it has an excellent feature in that the trouble of replacing contact parts can be saved.
図面は本発明の一実施例の要部側断面図であ
る。
１ａ，１ｂ……側板、２……現像スリーブ、
３，６……軸受、５……マグネツトロール、９…
…マグネツトロール軸、１０……ブラケツト、１
１……ガイドボス、１２……圧縮ばね、１３……
押圧ピン。
The drawing is a side sectional view of a main part of an embodiment of the present invention. 1a, 1b...side plate, 2...developing sleeve,
3, 6...bearing, 5...magnetic roll, 9...
...Magnetic roll shaft, 10...Bracket, 1
1... Guide boss, 12... Compression spring, 13...
Press pin.
Claims (1)
リーブと、前記現像スリーブと導電性フランジ及
び軸受を介して回転自在に保持されたマグネツト
ローラと、前記マグネツトローラの一端軸に設け
られその回転を任意に調整する調整部と、前記マ
グネツトローラの他端軸に設けられ該軸を常時押
圧する押圧部とを備え、前記押圧部にバイアス電
圧を印加することにより前記現像スリーブに前記
バイアス電圧を印加させたことを特徴とする電子
写真複写機の現像装置。1. A conductive developing sleeve rotatably held on a side plate, a magnet roller rotatably held via the developing sleeve, a conductive flange, and a bearing, and a magnet roller provided on one end shaft of the magnet roller. The developing sleeve is provided with an adjusting section for arbitrarily adjusting the rotation, and a pressing section provided on the other end shaft of the magnet roller and constantly pressing the shaft, and by applying a bias voltage to the pressing section, the bias voltage is applied to the developing sleeve. A developing device for an electrophotographic copying machine, characterized in that a voltage is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2254380A JPS56119154A (en) | 1980-02-25 | 1980-02-25 | Developing device of electrophotographic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2254380A JPS56119154A (en) | 1980-02-25 | 1980-02-25 | Developing device of electrophotographic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56119154A JPS56119154A (en) | 1981-09-18 |
| JPH0127423B2 true JPH0127423B2 (en) | 1989-05-29 |
Family
ID=12085729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2254380A Granted JPS56119154A (en) | 1980-02-25 | 1980-02-25 | Developing device of electrophotographic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56119154A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5971361U (en) * | 1982-11-04 | 1984-05-15 | 株式会社リコー | bearing device |
| US4608737A (en) * | 1984-08-20 | 1986-09-02 | Magnetic Technologies Corp. | Magnet developer rolls |
| US5196889A (en) * | 1992-02-04 | 1993-03-23 | Eastman Kodak Company | Apparatus for applying an electrical bias to a shell of a magnetic brush |
-
1980
- 1980-02-25 JP JP2254380A patent/JPS56119154A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56119154A (en) | 1981-09-18 |
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