JPH0529482Y2 - - Google Patents
Info
- Publication number
- JPH0529482Y2 JPH0529482Y2 JP1986101196U JP10119686U JPH0529482Y2 JP H0529482 Y2 JPH0529482 Y2 JP H0529482Y2 JP 1986101196 U JP1986101196 U JP 1986101196U JP 10119686 U JP10119686 U JP 10119686U JP H0529482 Y2 JPH0529482 Y2 JP H0529482Y2
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- shielding member
- toner
- developer
- high frequency
- 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 - Lifetime
Links
Landscapes
- Dry Development In Electrophotography (AREA)
- Cleaning In Electrography (AREA)
Description
【考案の詳細な説明】
イ 考案の目的
〔産業上の利用分野〕
本考案は例えば電子写真装置に適用する現像装
置に関するもので、特に、トナーの飛散を防止す
るようにした現像装置に関するものである。[Detailed description of the invention] A. Purpose of the invention [Industrial field of application] The present invention relates to a developing device that is applied to, for example, an electrophotographic device, and particularly relates to a developing device that prevents toner from scattering. be.
従来、この種の現像装置は、トナー飛散を吸引
するダクトを現像器の周りに設けて、トナー飛散
防止を行つている。
Conventionally, this type of developing device prevents toner from scattering by providing a duct around the developing unit to suck in toner scattering.
ところが、装置の大型化・複雑化が問題になつ
た。また、現像部より上流側に遮蔽部材を設ける
ものでも、長く使用すると、遮蔽部材表面にトナ
ーが蓄積し、この蓄積トナーがこぼれることで、
画像を汚すという問題が生じた。
However, the increasing size and complexity of the equipment became a problem. In addition, even if a shielding member is provided upstream of the developing section, if used for a long time, toner will accumulate on the surface of the shielding member, and this accumulated toner will spill.
A problem arose in that the image was smudged.
本考案は現像装置の上流側へのトナー飛散を完
全に遮蔽することが可能となると同時に、トナー
の落ちこぼれによる画像汚し問題も防止すること
ができる現像装置を得ることを目的とする。 An object of the present invention is to provide a developing device that can completely block toner scattering to the upstream side of the developing device, and at the same time prevent the problem of image smearing caused by falling toner.
ロ 発明の構成
〔問題点を解決するための手段〕
本考案は、潜像を保持する潜像保持体と周面に
現像剤を保持する現像剤担持体とを対向させ、潜
像保持体面を上記付着現像剤で現像する現像装置
において、上記対向部より上流側に潜像保持体面
に当接し該上流側を遮蔽する遮蔽部材を設け、こ
の遮蔽部材を高周波振動素子により高周波振動さ
せることを特徴とする現像装置である。B. Structure of the Invention [Means for Solving Problems] The present invention has a latent image holder that holds a latent image and a developer carrier that holds a developer on its peripheral surface facing each other, so that the surface of the latent image holder is The developing device that performs development using the adhered developer is characterized in that a shielding member is provided on the upstream side of the opposing portion to abut against the surface of the latent image carrier and shield the upstream side, and the shielding member is vibrated at high frequency by a high-frequency vibration element. This is a developing device.
現像部の上流側からのトナー飛散が遮蔽部材で
防止されるとともに、この遮蔽部材を高周波振動
させてトナーの蓄積を防止するので、蓄積トナー
の落下による画像汚しもなくなる。
Since toner scattering from the upstream side of the developing section is prevented by the shielding member, and the shielding member is vibrated at high frequency to prevent toner accumulation, image staining due to falling of accumulated toner is also eliminated.
図面は本考案の実施例を示す断面図であり、図
において、１は所定速度で矢印方向に回転自在に
支持されたドラム状の潜像保持体で、この潜像保
持体の表面には不図示の画像形成装置によつて潜
像が形成される。２な上記潜像保持体１と対向す
る下部側面に開口３が形成された現像ケースで、
内部には所定速度で矢印方向に回転自在に支持さ
れた、現像剤担持体たる現像スリーブ４およびキ
ヤリヤとトナーからなる２成分現像剤５を混合撹
拌しながら現像スリーブ側へ供給するスクリユ６
ａ，６ｂとが並設されている。７は現像部の上流
側、つまり、現像ケース２より外部に露出した現
像スリーブ４の上部を遮蔽する遮蔽部材で、現像
ケース２の外側面に取付けた第１遮蔽部材７ａと
該第１遮蔽部材に取付け先端を潜像保持体１に当
接させた第２遮蔽部材７ｂとからなる。ここで、
第１遮蔽部材７ａはアクリル、ポリエチレン、ポ
リカーボネートなどの樹脂やガラス、磁器、
BaTiO3やフアインセラミツク（Al2O3、ZrO2、
TiO2、MgO、SiO2、SiC）などの誘電体部材ま
たは強誘電体部材を用いる。第２遮蔽部材７ｂは
潜像保持体１の表面より硬度が小さく、かつ、弾
性のある部材、例えば25μmマイラを用いて軽く
潜像保持体に当接させたが、潜像電荷を乱さない
ものであれば、ウレタンゴムやシリコンゴムなど
でもよい。
The drawing is a cross-sectional view showing an embodiment of the present invention, and in the drawing, 1 is a drum-shaped latent image carrier supported rotatably in the direction of the arrow at a predetermined speed. A latent image is formed by the illustrated image forming apparatus. 2. A developing case in which an opening 3 is formed in the lower side surface facing the latent image holding member 1,
Inside, there is a developing sleeve 4 which is a developer carrier and is supported rotatably at a predetermined speed in the direction of the arrow, and a screw 6 which supplies two-component developer 5 consisting of a carrier and toner to the developing sleeve side while mixing and stirring.
a and 6b are arranged in parallel. Reference numeral 7 denotes a shielding member that shields the upstream side of the developing section, that is, the upper part of the developing sleeve 4 exposed to the outside from the developing case 2, and includes a first shielding member 7a attached to the outer surface of the developing case 2, and the first shielding member. and a second shielding member 7b whose tip is attached to the latent image holder 1. here,
The first shielding member 7a is made of resin such as acrylic, polyethylene, or polycarbonate, glass, porcelain,
BaTiO 3 and fine ceramics (Al 2 O 3 , ZrO 2 ,
A dielectric material or ferroelectric material such as TiO 2 , MgO, SiO 2 , SiC) is used. The second shielding member 7b is made of an elastic member that is less hard than the surface of the latent image carrier 1, such as 25 μm Mylar, and is brought into light contact with the latent image carrier, but does not disturb the latent image charge. If so, urethane rubber or silicone rubber may be used.
８は第１遮蔽部材７ａに取付けた超音波振動子
であり、駆動回路９で駆動されて第１遮蔽部材を
高周波振動させる。ここで、高周波としては数
100KHzから数100Hzの範囲で十分である。 Reference numeral 8 denotes an ultrasonic vibrator attached to the first shielding member 7a, which is driven by a drive circuit 9 to vibrate the first shielding member at high frequency. Here, the high frequency is a number
A range of 100KHz to several 100Hz is sufficient.
現像スリーブ４が不図示の駆動装置で矢印方向
に回転駆動されると、その表面に開口３との隙間
の厚さに付着した現像剤５ａが潜像保持体１との
対向部に移送されて現像に供される。 When the developing sleeve 4 is rotationally driven in the direction of the arrow by a drive device (not shown), the developer 5a adhering to its surface in the thickness of the gap between it and the opening 3 is transferred to the part facing the latent image holder 1. Subjected to development.
この現像スリーブ４の上部は潜像保持体と該現
像スリーブおよび第１・第２遮蔽部材７ａ，７ｂ
により閉じ領域となり、トナーの現像ケース外部
への飛散を防止する。このとき、第１遮蔽部材７
ａは超音波振動子で駆動されて高周波振動してい
るので、トナーが付着蓄積することがなく、蓄積
トナーのこぼれ落ちによる画像汚れを生ずること
もない。 The upper part of the developing sleeve 4 includes a latent image holding body, the developing sleeve and first and second shielding members 7a and 7b.
This creates a closed area and prevents toner from scattering to the outside of the developing case. At this time, the first shielding member 7
Since a is driven by an ultrasonic vibrator and vibrates at a high frequency, toner does not adhere and accumulate, and image stains due to accumulated toner falling off do not occur.
上記実施例では、強誘電体の第１遮蔽部材７ａ
上に超音波振動子８を設置したが、圧電性部材で
第１遮蔽部材７ａを作り該第１遮蔽部材の表・裏
両面に電極を設け、高周波駆動することで第１遮
蔽部材７ａ自身を自己振動させても良い。ここ
で、圧電性部材としては、水晶、BaTi3、ZnS、
ZnO、PzTセラミツクなどが使用できる。 In the above embodiment, the first shielding member 7a made of ferroelectric material
The ultrasonic transducer 8 is installed above, and the first shielding member 7a is made of a piezoelectric material, electrodes are provided on both the front and back surfaces of the first shielding member, and the first shielding member 7a itself is driven by high frequency. It may be allowed to vibrate itself. Here, as the piezoelectric member, crystal, BaTi 3 , ZnS,
ZnO, PzT ceramics, etc. can be used.
ハ 考案の効果
以上のように、この考案によれば、現像剤担持
体上部に遮蔽部材を設け、この遮蔽部材を高周波
振動素子により高周波振動させるので、現像ケー
スから機械内部への大量のトナー飛散を防止し、
かつ、トナーの付着蓄積を生じないので、トナー
のこぼれ落ちによる画像汚れを防止でき、長期に
渡つて最適の画像を得ることができるという効果
がある。また、遮蔽部材に付着防止されたトナー
により、カブリ等の画像劣化が生じることもな
い。また、遮蔽部材は潜像保持体面に接触してい
るが、高周波振動素子により高周波振動されるの
で、潜像保持体面を損傷したり、潜像保持体面に
トナーを融着させたりすることもない。C. Effect of the invention As described above, according to this invention, a shielding member is provided above the developer carrier, and this shielding member is vibrated at high frequency by a high-frequency vibration element, so that a large amount of toner is not scattered from the developer case into the inside of the machine. prevent,
In addition, since toner does not adhere and accumulate, it is possible to prevent image stains due to toner spillage, and it is possible to obtain optimal images over a long period of time. Further, image deterioration such as fogging does not occur due to toner that is prevented from adhering to the shielding member. Furthermore, although the shielding member is in contact with the surface of the latent image carrier, it is vibrated at high frequency by the high frequency vibration element, so there is no possibility of damaging the surface of the latent image carrier or fusion of toner to the surface of the latent image carrier. .
図は本考案の実施例を示す現像装置の断面図で
ある。
１は潜像保持体、５は現像剤、４は現像スリー
ブ、７は遮蔽部材、８は超音波振動子。
The figure is a sectional view of a developing device showing an embodiment of the present invention. 1 is a latent image holding member, 5 is a developer, 4 is a developing sleeve, 7 is a shielding member, and 8 is an ultrasonic vibrator.
Claims (1)
持する現像剤担持体とを対向させ、潜像保持体面
を上記付着現像剤で現像する現像装置において、
上記対向部より上流側に潜像保持体面に当接し該
上流側を遮蔽する遮蔽部材を設け、この遮蔽部材
を高周波振動素子により高周波振動させることを
特徴とする現像装置。 A developing device in which a latent image holder holding a latent image and a developer carrying member holding a developer on a peripheral surface face each other, and the surface of the latent image holder is developed with the adhered developer,
A developing device characterized in that a shielding member is provided on the upstream side of the opposing portion to abut against the surface of the latent image carrier and shield the upstream side, and the shielding member is vibrated at high frequency by a high frequency vibration element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986101196U JPH0529482Y2 (en) | 1986-07-01 | 1986-07-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986101196U JPH0529482Y2 (en) | 1986-07-01 | 1986-07-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS638762U JPS638762U (en) | 1988-01-21 |
| JPH0529482Y2 true JPH0529482Y2 (en) | 1993-07-28 |
Family
ID=30971722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986101196U Expired - Lifetime JPH0529482Y2 (en) | 1986-07-01 | 1986-07-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0529482Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018072625A (en) * | 2016-10-31 | 2018-05-10 | 株式会社リコー | Developing device, process cartridge, and image forming apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57142742U (en) * | 1981-03-03 | 1982-09-07 | ||
| JPS57208577A (en) * | 1981-06-19 | 1982-12-21 | Fuji Xerox Co Ltd | Choking preventing device for toner density detector of electronic copying machine |
| JPS60473A (en) * | 1983-05-20 | 1985-01-05 | Fuji Xerox Co Ltd | Developing device of copying machine or the like |
-
1986
- 1986-07-01 JP JP1986101196U patent/JPH0529482Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS638762U (en) | 1988-01-21 |
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