JPH02140547U - - Google Patents
Info
- Publication number
- JPH02140547U JPH02140547U JP4951489U JP4951489U JPH02140547U JP H02140547 U JPH02140547 U JP H02140547U JP 4951489 U JP4951489 U JP 4951489U JP 4951489 U JP4951489 U JP 4951489U JP H02140547 U JPH02140547 U JP H02140547U
- Authority
- JP
- Japan
- Prior art keywords
- view
- latent image
- image carrier
- developing
- showing
- 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.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 1
Description
第１図はこの考案の複写機の全体の概略断面図
、第２図はこの考案の要部断面図、第３図はこの
考案における潜像担持体電位と導電性プレート電
位の関係を示すグラフ、第４図はこの考案におけ
る現像装置に取付けられるシール部材の潜像乱れ
発生表かと表面粗さとの関係を示すグラフ、第５
図は現像装置にトナー乗上げ防止用シール部材の
取付け状態を示す分解斜視図、第５Ａ図はトナー
乗上げ防止用シール部材の別の取付け状態を示す
分解断面図、第６図ないし第８図はそれぞれトナ
ー乗上げ防止用シール部材の取付け状態を示す背
面図、側面図及び平面図、第９図はトナー乗上げ
防止用シール部材の別の形態を示す平面図、第１
０図は現像装置に取付けられるトナーセンサの清
掃部材の取付け状態を示す平面断面図、第１１図
ａ，ｂはトナーセンサ清掃部材の別の取付け状態
を示す断面図、第１２図はトナーセンサとトナー
センサ清掃部材との距離とセンサ出力電圧との関
係を示すグラフ、第１３図は現像装置のリトラク
ト機構を示す平面図、第１４図はリトラクト機構
の駆動カムを示す平面図、第１５図は第１４図の
−矢視図、第１６図はリトラクト機構の
従動カムを示す平面図、第１７図は第１６図の
−矢視図、第１８図及び第１９図は駆動カ
ムと従動カムの関係を示す側面図、第２０図はこ
の考案における別のリトラクト機構を示す平面図
、第２１図及び第２２図はそれぞれ別のリトラク
ト機構における駆動カムと従動カムとの関係を示
す側面図、第２３図は従来の複写機の全体を示す
概略断面図である。
符号説明、１２…感光ドラム（潜像担持体）１
３…帯電器、１４…露光手段、１５…第１現像装
置、１６…第２現像装置、１７…転写器、１８…
クリーニング装置、２５…リトラクト機構、３５
…導電性プレート、４３…バイアス電源、４６…
スイツチング素子（切換手段）、４７，４８…電
源、４９…バイアス電源。
Figure 1 is a schematic sectional view of the entire copying machine of this invention, Figure 2 is a sectional view of the main parts of this invention, and Figure 3 is a graph showing the relationship between the latent image carrier potential and the conductive plate potential in this invention. , FIG. 4 is a graph showing the relationship between the latent image disturbance occurrence table and the surface roughness of the sealing member attached to the developing device in this invention.
FIG. 5A is an exploded perspective view showing how the seal member for preventing toner riding-up is attached to the developing device, FIG. 5A is an exploded sectional view showing another attachment state of the sealing member for preventing toner riding-up, and FIGS. 6 to 8 9 is a rear view, a side view, and a plan view showing the attached state of the seal member for preventing toner from running over, and FIG. 9 is a plan view showing another form of the seal member for preventing toner from running over, and FIG.
Figure 0 is a plan sectional view showing how the toner sensor cleaning member is attached to the developing device, Figures 11a and b are sectional views showing another attachment status of the toner sensor cleaning member, and Figure 12 is the toner sensor cleaning member. A graph showing the relationship between the distance to the toner sensor cleaning member and the sensor output voltage, FIG. 13 is a plan view showing the retract mechanism of the developing device, FIG. 14 is a plan view showing the drive cam of the retract mechanism, and FIG. 15 is a graph showing the relationship between the distance to the toner sensor cleaning member and the sensor output voltage. FIG. 14 is a plan view showing the driven cam of the retract mechanism, FIG. 17 is a plan view showing the driven cam of FIG. 16, and FIGS. 18 and 19 are views of the driving cam and driven cam 20 is a plan view showing another retract mechanism in this invention; FIGS. 21 and 22 are side views showing the relationship between the driving cam and the driven cam in the different retract mechanisms; FIG. FIG. 23 is a schematic sectional view showing the entire conventional copying machine. Description of symbols: 12...Photosensitive drum (latent image carrier) 1
3... Charger, 14... Exposure means, 15... First developing device, 16... Second developing device, 17... Transfer device, 18...
Cleaning device, 25... Retract mechanism, 35
...Conductive plate, 43...Bias power supply, 46...
Switching element (switching means), 47, 48...power supply, 49...bias power supply.
Claims (1)
書込み用露光手段、現像手段、転写手段及びクリ
ーニング手段等を具備し、上記現像手段が上記潜
像担持体に対して接離移動可能に配設されると共
に、現像手段を構成する少なくとも１つが２成分
系現像剤を収容する現像装置にて形成される複写
機において、上記現像装置の上記潜像担持体と近
接する部位に導電性プレートを対峙させると共に
、この導電性プレートに切換手段を介して互いに
逆極性のバイアス印加電圧源を接・断可能に接続
して成ることを特徴とする複写機。 A charging means, an exposure means for image writing, a developing means, a transfer means, a cleaning means, etc. are provided at positions facing the outer peripheral side of the latent image carrier, and the developing means is arranged so as to be movable toward and away from the latent image carrier. In a copying machine in which at least one of the developing means is a developing device containing a two-component developer, a conductive plate is provided in a portion of the developing device adjacent to the latent image carrier. A copying machine characterized in that bias application voltage sources of opposite polarity are connected/disconnected to the conductive plates through a switching means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4951489U JPH02140547U (en) | 1989-04-28 | 1989-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4951489U JPH02140547U (en) | 1989-04-28 | 1989-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02140547U true JPH02140547U (en) | 1990-11-26 |
Family
ID=31567266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4951489U Pending JPH02140547U (en) | 1989-04-28 | 1989-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02140547U (en) |
-
1989
- 1989-04-28 JP JP4951489U patent/JPH02140547U/ja active Pending