JPH03181973A - Developing device and process cartridge using same - Google Patents
Developing device and process cartridge using sameInfo
- Publication number
- JPH03181973A JPH03181973A JP1322315A JP32231589A JPH03181973A JP H03181973 A JPH03181973 A JP H03181973A JP 1322315 A JP1322315 A JP 1322315A JP 32231589 A JP32231589 A JP 32231589A JP H03181973 A JPH03181973 A JP H03181973A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- stirring
- toner
- process cartridge
- developing device
- 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
- 238000000034 method Methods 0.000 title claims description 19
- 238000003756 stirring Methods 0.000 claims description 32
- 238000007600 charging Methods 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000007786 electrostatic charging Methods 0.000 abstract 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 10
- 239000005020 polyethylene terephthalate Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子写真複写装置、静電記録装置、レーザビ
ームプリンタ等の画像形成装置の現像装置及びそれを用
いたプロセスカートリッジに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a developing device for an image forming apparatus such as an electrophotographic copying device, an electrostatic recording device, or a laser beam printer, and a process cartridge using the same.
〔従来の技術）
この種の現像装置において、現像剤容器内で薄いゴム上
のシート部材を回転させることによって現像剤の攪拌及
び搬送を行っているが、この現像剤の攪拌及び搬送が円
滑になされるべく、前記シート部材が現像剤容器の内面
に均一に摺接するように構成されている。モして現像容
器の一部を透明にし、光透過型または光反射型センサー
を用いて現像剤の残量を検知していた。[Prior Art] In this type of developing device, the developer is stirred and conveyed by rotating a thin rubber sheet member within the developer container. In order to achieve this, the sheet member is configured to uniformly slide into contact with the inner surface of the developer container. A portion of the developer container was made transparent, and a light transmission type or light reflection type sensor was used to detect the amount of developer remaining.
しかしながら、従来の現像装置にあっては、現像剤を確
実に搬送する為にシート部材が現像剤容器と強く摺擦す
るようにしたが、帯電している現像剤が透明部材に静電
付着してしまい、現像剤の残量を透過型又は反射型のセ
ンサーを用いて検知しようとしても、これが不可能とな
るという問題があった。However, in conventional developing devices, the sheet member rubs strongly against the developer container in order to reliably transport the developer, but the charged developer electrostatically adheres to the transparent member. Therefore, there is a problem in that even if an attempt is made to detect the remaining amount of developer using a transmissive or reflective sensor, it is impossible to do so.
（課題を解決する為の手段）
本発明は上記問題点に鑑みてなされたもので、その目的
とする処は、現像剤容器の透明部材への現像剤の静電付
着を防止し、軍備な現像剤残量検知を可能ならしめる現
像装置及びプロセスカートリッジを提供することにある
。(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent electrostatic adhesion of developer to the transparent member of a developer container, and to prevent military use. It is an object of the present invention to provide a developing device and a process cartridge that enable detection of the remaining amount of developer.
上記目的を遠戚すべく本発明は、現像剤の攪拌・搬送手
段を現像剤容器内に備える現像装置又はプロセスカート
リッジにおいて、前記攪拌、搬送手段が現像剤容器に設
けられた現像剤残量検出用の透明部材と摺接し、この摺
接により前記攪拌、搬送手段が現像剤の帯電極性と異極
性に、前記透明部材が現像剤の帯電極性と同極性に帯電
することを特徴とするものである。In order to achieve the above object, the present invention provides a developing device or a process cartridge in which a developer stirring/transporting means is provided in a developer container, in which the developer remaining amount detection is provided in a developer container. The device is characterized in that the stirring and conveying means is in sliding contact with a transparent member for use, and as a result of this sliding contact, the stirring and conveying means is charged to a polarity different from that of the developer, and the transparent member is charged to a polarity that is the same as that of the developer. be.
すなわち、本発明によれば前記攪拌、搬送手段であるシ
ート部材が、前記透明部材上に付着している現像剤を良
好にクリーニングするために、強く摺擦させて、前記透
明部材が摩擦帯電しても、現像剤と同極性に帯電してい
るｋめ、現像剤が前記透明部材と反発しあい、現像剤が
前記透明部材に静電付着することを防止できる。よって
現像剤の残量を透過型又は反射型のセンサーを用いて正
確に検知できる。That is, according to the present invention, the sheet member serving as the stirring and conveying means rubs strongly in order to properly clean the developer adhering to the transparent member, so that the transparent member is triboelectrically charged. However, since the developer is charged to the same polarity as the developer, the developer repels the transparent member and prevents the developer from electrostatically adhering to the transparent member. Therefore, the remaining amount of developer can be accurately detected using a transmissive or reflective sensor.
〔実施例） 以下に本発明の実施例を添付図面に基づいて説明する。〔Example) Embodiments of the present invention will be described below based on the accompanying drawings.
第１図は本発明に係る現像装置を備えるプロセスカート
リッジの縦断面図、第２図は同プロセスカートリッジの
部分斜視図である。FIG. 1 is a longitudinal sectional view of a process cartridge equipped with a developing device according to the present invention, and FIG. 2 is a partial perspective view of the same process cartridge.
プロセスカートリッジ１００は画像形成装置本体に対し
て着脱自在に構成されるものであって、これのハウジン
グ１０内の図中、右寄りには像担持体としての電子写真
感光ドラム１が回転自在に配されており、プロセスカー
トリッジ１００が画像形成装置本体から取り出されてい
るときには、該感光ドラム１は図中、実線にて示す閉じ
状態にある防護カバー（ドラムカバー）５にて被われて
その損傷、外光による劣化等が防がれている。The process cartridge 100 is configured to be detachably attached to the main body of the image forming apparatus, and an electrophotographic photosensitive drum 1 as an image carrier is rotatably disposed on the right side of the housing 10 in the figure. When the process cartridge 100 is removed from the main body of the image forming apparatus, the photosensitive drum 1 is covered with a protective cover (drum cover) 5 in the closed state shown by the solid line in the figure to protect it from damage and external parts. Deterioration caused by light is prevented.
尚、プロセスカートリッジ１ｏｏが画像形成装置本体内
の支持部材１０１に載置装填された際には、不図示の機
構によって防護カバー５が第１図中、鎖線にて示すよう
に開けられ、感光ドラム１の一部は開口部１１から外部
に露出する。そして、この感光ドラム１は、ハウジング
１ｏの第１図中、左側面に形成されたスリット状の露光
窓６を介して画像形成装置本体で形成された光像露光光
（原稿画像のスリット露光光、レーザビーム走査露光光
等）Ｌの照射をその光像露光工程部１９に受ける。尚、
第１図中、８は装置本体側に設けられた転写帯電器であ
る。Note that when the process cartridge 1oo is loaded onto the support member 101 inside the image forming apparatus main body, the protective cover 5 is opened as shown by the chain line in FIG. 1 by a mechanism not shown, and the photosensitive drum is removed. 1 is exposed to the outside through the opening 11. The photosensitive drum 1 receives light image exposure light (slit exposure light of an original image) formed in the main body of the image forming apparatus through a slit-shaped exposure window 6 formed on the left side of the housing 1o in FIG. , laser beam scanning exposure light, etc.) is applied to the optical image exposure process section 19 . still,
In FIG. 1, 8 is a transfer charger provided on the main body side of the apparatus.
又、ハウジング１０内には帯電装置２、クリーニング装
置４及び現像装置３が設けられるが、帯電装置２とクリ
ーニング装置４は、前記露光窓６から感光ドラム１の光
像露光工程部１９に至る略水平な光像露光光路１７の上
側に配され、現像装置３は同光像露光光路１７の下側に
配されている。Further, a charging device 2, a cleaning device 4, and a developing device 3 are provided in the housing 10. The developing device 3 is arranged above the horizontal light image exposure optical path 17, and the developing device 3 is arranged below the same light image exposure optical path 17.
上記帯電装置２は、感光ドラム１に摺接して回転する接
触帯電ローラ（又は摩擦帯電ローラ）２Ａを含んで構成
され、該接触帯電ローラ２Ａはクリーニング装置４の凹
部２０内に収納されている。尚、帯電装置２はコロナ帯
電器であってもよい。The charging device 2 includes a contact charging roller (or friction charging roller) 2A that rotates in sliding contact with the photosensitive drum 1, and the contact charging roller 2A is housed in a recess 20 of the cleaning device 4. Note that the charging device 2 may be a corona charger.
又、前記クリーニング装置４は、ゴム製等のクリーニン
グブレード４ａを含んで構成されるが、クリーニングブ
レード４ａは接触帯電ローラ２Ａよりも感光ドラム１の
回転方向上流側の感光ドラム１上面部に対して接触して
いる。The cleaning device 4 includes a cleaning blade 4a made of rubber or the like, and the cleaning blade 4a is attached to the upper surface of the photosensitive drum 1 on the upstream side in the rotational direction of the photosensitive drum 1 with respect to the contact charging roller 2A. are in contact.
前記現像装置３は、現像ローラ３ａを収容して成る現像
器３ｂと、その左側に連設具備されるトナー容器３ｃ（
現像剤は以下単にトナーと呼ぶことにする。）を有し、
現像器３ｂとトナー容器３Ｃは両者の隔壁に設けた連通
孔３ｄを介して連通せしめられている。トナー容器３ｂ
内のトナーｔは、撹拌棒３ｅが所定の速度で回転駆動さ
れることにより攪拌を受けるとともに、撹拌棒３ｅの先
端側に取り付けられた攪拌シート部材３ｆでその一部が
連通孔３ｄから現像器３ｂ内、に撹拌棒３ｅの１回転毎
に間欠的に送り込まれて補給される。The developing device 3 includes a developing device 3b that accommodates a developing roller 3a, and a toner container 3c that is connected to the left side of the developing device 3b.
The developer will be simply referred to as toner hereinafter. ),
The developing device 3b and the toner container 3C are communicated with each other through a communication hole 3d provided in a partition wall between the two. Toner container 3b
The toner t inside is agitated by the stirring rod 3e being driven to rotate at a predetermined speed, and a part of the toner t is transferred from the communication hole 3d to the developing unit by the stirring sheet member 3f attached to the tip side of the stirring rod 3e. 3b is intermittently fed and replenished every rotation of the stirring rod 3e.
尚、トナー容器３ｃの上部は蓋部材３ｇにて閉塞されて
いる。又、現像ローラ３ａ、ｆ電ローラ２Ａに対しては
所要の電圧（帯電電圧、現像バイアス）が印加される。Note that the upper part of the toner container 3c is closed with a lid member 3g. Further, a required voltage (charging voltage, developing bias) is applied to the developing roller 3a and the f-electric roller 2A.
而して、感光ドラム１は帯電ローラ２Ａにより正又は負
の一様帯電を受け、光像露光工程部１９で光像露光光り
を受けることにより潜像形成がなされ、その潜像が現像
ローラ３ａでトナー像として現像される。そして、その
トナー像が像転写工程部にて感光ドラム１と転写帯電器
８との間に画像形成装置本体内の給紙機構（不図示）か
ら給送された複写材Ｐ面に順次転写される。像転写を受
け、感光ドラム１面から分離された複写材Ｐは、定着装
置（不図示〉へ搬送されて像転写を受け、コピーとして
機外へ排出される。他方、像転写後の感光ドラム１面は
クリーニング装置４のクリーニングブレード４ａにより
転写残りトナー、その他の付着物の拭掃除去を受けて清
浄面化され、繰返して像形成に供される。Thus, the photosensitive drum 1 is uniformly charged positively or negatively by the charging roller 2A, and is subjected to photoimage exposure light in the photoimage exposure process section 19 to form a latent image, and the latent image is transferred to the developing roller 3a. It is developed as a toner image. Then, the toner image is sequentially transferred between the photosensitive drum 1 and the transfer charger 8 in the image transfer process section onto the surface of the copy material P fed from a paper feed mechanism (not shown) in the main body of the image forming apparatus. Ru. The copying material P that has undergone image transfer and has been separated from the first surface of the photosensitive drum is conveyed to a fixing device (not shown), where it undergoes image transfer and is discharged outside the machine as a copy.On the other hand, the photosensitive drum after image transfer One surface is wiped off by a cleaning blade 4a of a cleaning device 4 to remove residual toner after transfer and other deposits to make it a clean surface, and is repeatedly used for image formation.
ところで、トナー容器３Ｃの側面と底面には透明部材か
ら成る窓７１．７２がそれぞれ嵌め込まれているが、こ
れら窓７１．７２は撹拌棒３ｅの回転中心（攪拌中心）
から等距離の位置に配されており、その内面７１ａ、７
２ａはトナー容器３Ｃの内面３ｈから攪拌部３ｅ側へ突
出している。Incidentally, windows 71 and 72 made of transparent members are fitted into the side and bottom surfaces of the toner container 3C, respectively, and these windows 71 and 72 are located at the center of rotation (stirring center) of the stirring rod 3e.
It is arranged at a position equidistant from the inner surface 71a, 7
2a protrudes from the inner surface 3h of the toner container 3C toward the stirring section 3e.
又、画像形成装置本体に装填された状態でのプロセスカ
ートリッジ１００外の現像装置３の側方には、１字状を
成すセンサー台７０が前記窓７１．７２を外側から被う
ようにして配されており、該センサー台７０には発光部
７４と受光部７３が窓７１．７２を挟むようにして対向
配置されている。尚、発光部７４はランプ、発光ダイオ
ード等で構成されており、受光部７３は光電セルの如き
光を電流に変換する素子で構成されている。台７０は画
像形成装置本体側に設けられている。Further, on the side of the developing device 3 outside the process cartridge 100 when loaded in the main body of the image forming apparatus, a sensor stand 70 having a letter shape is arranged so as to cover the windows 71 and 72 from the outside. A light emitting section 74 and a light receiving section 73 are arranged opposite to each other on the sensor stand 70 with windows 71 and 72 interposed therebetween. Note that the light emitting section 74 is composed of a lamp, a light emitting diode, etc., and the light receiving section 73 is composed of an element such as a photocell that converts light into electric current. The stand 70 is provided on the image forming apparatus main body side.
而して、トナー容器３Ｃ内で撹拌棒３ｅが回転すると、
その都度攪拌シート部材３ｆが窓７１゜７２の表面７１
ａ、７２ａを擦ってトナーｔを拭き取るが、前述のよう
に窓７１ａ、７２ａの内面（表面）７１ａ、７２ａはト
ナー容器３Ｃの内面３ｈよりも内方（撹拌棒３ｅ側）に
突出しているため、この内面７１ａ、７２ａにおける攪
拌シート部材３ｆの当接圧が部分的に高まり、ここでの
トナーｔのクリーニングが行われる。そして、画像形成
時にトナー容器３Ｃ内のトナーｔが撹拌棒３ｅの回転に
よって連通孔３ｄから現像器３ｂ内に送られて消費され
ると、トナー容器３Ｃ内のトナーを量（残量）が徐々に
減少するが、発光部７４から発せられる光が窓７１．７
２を通過して受光部７３に届くようになると、受光部７
３はこの光の照射を受けて電圧を発生するため、この電
圧レベルを検知することによってトナー容器３Ｃ内のト
ナーｔの残量を知ることができる。尚、本実施例におい
ては、窓７１．７２は前述のように攪拌中心から等距離
の位置に配されているため、これら窓７１．７２の内面
７１ａ、７２ａは攪拌シート部材３ｆによって等しい圧
力で擦られてその表面からトナーｔが拭き取られる。Then, when the stirring rod 3e rotates within the toner container 3C,
Each time, the stirring sheet member 3f is moved to the surface 71 of the window 71° 72.
The toner t is wiped off by rubbing the windows 71a and 72a, but as mentioned above, the inner surfaces 71a and 72a of the windows 71a and 72a protrude inward (toward the stirring bar 3e) than the inner surface 3h of the toner container 3C. The contact pressure of the stirring sheet member 3f on the inner surfaces 71a and 72a is partially increased, and the toner t is cleaned here. When the toner t in the toner container 3C is sent into the developing device 3b from the communication hole 3d by the rotation of the stirring rod 3e during image formation and is consumed, the amount (remaining amount) of the toner in the toner container 3C gradually decreases. However, the light emitted from the light emitting section 74 is
2 and reaches the light receiving section 73, the light receiving section 7
3 generates a voltage upon being irradiated with this light, and by detecting this voltage level, it is possible to know the remaining amount of toner t in the toner container 3C. In this embodiment, since the windows 71 and 72 are arranged at equal distances from the stirring center as described above, the inner surfaces 71a and 72a of these windows 71 and 72 are applied with equal pressure by the stirring sheet member 3f. The toner t is wiped off from the surface by rubbing.
本実施例において、攪拌シート部材３ｆはポリエチレン
テレフタレート（ＰＥＴ）を用いた。厚みは１００μｍ
であった。ここで、窓７１．７２の各材質と攪拌シート
部材３ｆであるポリエチレンテレフタレート（ＰＥＴ）
との摩擦帯電極性の実験を行い、第１表１の結果が得ら
れた。In this example, polyethylene terephthalate (PET) was used for the stirring sheet member 3f. Thickness is 100μm
Met. Here, each material of the windows 71 and 72 and polyethylene terephthalate (PET) which is the stirring sheet member 3f
The results shown in Table 1 were obtained by conducting an experiment on frictional charging polarity.
第
１
表
そして本実施例においては、負極性に帯電するトナーを
用いているので、これを少量トナー容器３ｃ内に入れ、
窓７１．７２のトナー付着を観察したところ第２表の結
果が得られた。In Table 1 and in this example, negatively charged toner is used, so a small amount of this is placed in the toner container 3c,
When the toner adhesion on the windows 71 and 72 was observed, the results shown in Table 2 were obtained.
第 ２ 表
○はとんど付着せず： ×付着している第２表より、窓
７１．７２へのトナーの静電付着を防ぐには、窓７１．
７２の材質としてはポリスチレン（ｐｓ）又はポリカー
ボネート（ｐｃ）がよいことがわかる。これは、攪拌シ
ート部材３ｆであるポリエチレンテレフタレート（ＰＥ
Ｔ）と窓７１．７２であるポリスチレン（ｐｓ）やボ１
リカーボネート（ｐｃ）とが、互いに摩擦しあうことで
、攪拌シート部材３ｆが正、残検窓７１゜７２が負に帯
電する。そして負に帯電しているトナーと負に帯電して
いる窓７１．７２が、静電力で反発しあい、トナーが窓
７１．７２に静電付着しないのである。しかし、窓７１
．７２の材質としてアクリル樹脂を用いると、負帯電ト
ナーの場合、逆に窓７１．７２が正に帯電してしまうた
め、負に帯電しているトナーが、窓７１．７２に静電付
着してしまう。Table 2 ○: Almost no adhesion: × Adhesion According to Table 2, in order to prevent toner from electrostatically adhering to the windows 71 and 72, the window 71.
It can be seen that the material for 72 is preferably polystyrene (PS) or polycarbonate (PC). This is polyethylene terephthalate (PE) which is the stirring sheet member 3f.
When the polystyrene (PS) and polycarbonate (PC) which are the windows 71 and 72 rub against each other, the stirring sheet member 3f is positively charged and the remaining inspection windows 71 and 72 are negatively charged. Then, the negatively charged toner and the negatively charged windows 71, 72 repel each other due to electrostatic force, and the toner does not electrostatically adhere to the windows 71, 72. However, window 71
．． If acrylic resin is used as the material of the window 72, the window 71.72 will become positively charged in the case of negatively charged toner, so the negatively charged toner will electrostatically adhere to the window 71.72. Put it away.
以上の実験結果から、負帯電トナーを用いた場合、攪拌
シート部材３ｆと窓７１．７２との摩擦帯電において、
攪拌シート部材３ｆは正に帯電し、窓７１．７２はトナ
ーと同極性の負に帯電する材質のものをそれぞれ選べば
、トナーが窓に静電力で反発しあい、静電付着しない。From the above experimental results, when using negatively charged toner, in the frictional charging between the stirring sheet member 3f and the windows 71 and 72,
If the agitation sheet member 3f is positively charged and the windows 71 and 72 are made of a material that is negatively charged and has the same polarity as the toner, the toner will repel each other against the window by electrostatic force and will not be electrostatically attached.
以上のように本実施例においては、前述のように窓７１
．７２に負帯電トナーが静電付着しないため、正確な残
量検知が常に安定してなされる。As described above, in this embodiment, the window 71
．． Since negatively charged toner does not electrostatically adhere to the toner 72, accurate and stable remaining amount detection is always possible.
また、他の実施例として正極性に帯電するトナーを少量
トナー容器３Ｃ内に入れ窓７１．７２のトナー付着を観
察したところ第３表の結果が得られた。As another example, a small amount of positively charged toner was placed in the toner container 3C and the toner adhesion on the windows 71 and 72 was observed, and the results shown in Table 3 were obtained.
弔
表
○はとんど付着せず； ×付着している第３表より、窓
７１．７２への正帯電トナーの静電付着を防ぐには、ア
クリル樹脂がよいことがわかる。ただし、攪拌シート部
材３ｆはポリエチレンテレフタレート（ＰＥＴ）を用い
た。From Table 3, it can be seen that acrylic resin is good for preventing electrostatic adhesion of positively charged toner to the windows 71 and 72. However, polyethylene terephthalate (PET) was used for the stirring sheet member 3f.
これは第１表より攪拌シート部材３ｆであるポリエチレ
ンテレフタレート（ＰＥＴ）と窓７１゜７２であるアク
リル樹脂とが、互いに摩擦しあうことで攪拌シート部材
３ｆが負、窓７１．７２が正に帯電する。そして正に帯
電しているトナーと正に帯電している窓７１．７２が、
静電力で反発しあい、窓７１．７２に静電付着しないの
である。From Table 1, this is because the polyethylene terephthalate (PET) that is the stirring sheet member 3f and the acrylic resin that is the windows 71 and 72 rub against each other, so that the stirring sheet member 3f is negatively charged and the windows 71 and 72 are positively charged. do. Then, the positively charged toner and the positively charged windows 71 and 72,
They repel each other due to electrostatic force and are not electrostatically attached to the windows 71 and 72.
尚、部材３ｆはシート状の化パイプ状、棒状等にもする
ことができる。Note that the member 3f can also be shaped like a sheet, a pipe, a rod, or the like.
以上のように本発明によれば、攪拌部材と窓との当接圧
を高めて、窓が攪拌部材と摩擦帯電しても、攪拌部材が
トナーの帯電極性と異極性、残検窓がトナーの帯電極性
と同極性に帯電することにより、トナーが窓に対して静
電力で反発し、窓に静電付着しない。As described above, according to the present invention, even if the contact pressure between the agitating member and the window is increased and the window is charged by friction with the agitating member, the agitating member has a polarity different from that of the toner, and the remaining detection window is not charged with the toner. By being charged to the same polarity as the toner, the toner is repelled by electrostatic force against the window, and does not electrostatically adhere to the window.
よってトナーの残量を透過型又は反射型のセンサーを用
いて正確に検知できる。Therefore, the remaining amount of toner can be accurately detected using a transmissive or reflective sensor.
第１図は本発明に係る現像装置を備えるプロセスカート
リッジの縦断面図、第２図は同プロセスカートリッジの
部分斜視図。
３は現像装置、
３Ｃはトナー容器（現像剤容器）
３ｅは撹拌棒（攪拌、搬送手段）
７１．７２は透明窓（透明部材）FIG. 1 is a longitudinal sectional view of a process cartridge equipped with a developing device according to the present invention, and FIG. 2 is a partial perspective view of the same process cartridge. 3 is a developing device, 3C is a toner container (developer container), 3e is a stirring rod (stirring, conveyance means), 71.72 is a transparent window (transparent member)
Claims (2)
現像装置において、前記攪拌、搬送手段が現像剤容器に
設けられた現像剤残量検出用の透明部材と摺接し、この
摺接により前記攪拌、搬送手段が現像剤の帯電極性と異
極性に、前記透明部材が現像剤の帯電極性と同極性に帯
電することを特徴とする現像装置。(1) In a developing device that includes a developer stirring and transporting means in a developer container, the stirring and transporting means is in sliding contact with a transparent member for detecting the remaining amount of developer provided in the developer container, and this sliding contact The developing device is characterized in that the stirring and conveying means is charged to a polarity different from that of the developer, and the transparent member is charged to the same polarity as the developer.
像を現像する現像装置であって、現像剤の攪拌、搬送手
段を現像剤容器内に有する現像装置とを備え、画像形成
装置本体に着脱可能なプロセスカートリッジに於て、画
像形成装置本体に装着された際、現像剤残量を検出する
為に画像形成装置本体に設けられた発光手段と受光手段
に対向するように前記現像剤容器に設けられた透明部材
を有し、前記攪拌、搬送手段が透明部材と摺接し、この
摺接により前記攪拌、搬送手段が現像剤の帯電極性と異
極性に、前記透明部材が現像剤の帯電極性と同極性に帯
電することを特徴とするプロセスカートリッジ。(2) comprising an image carrier and a developing device that applies a developer to the image carrier to develop a latent image, the developer having means for stirring and transporting the developer in a developer container; In a process cartridge that is detachable from the image forming apparatus main body, when the process cartridge is installed in the image forming apparatus main body, the process cartridge faces the light emitting means and light receiving means provided on the image forming apparatus main body in order to detect the remaining amount of developer. has a transparent member provided in the developer container, and the stirring and conveying means is in sliding contact with the transparent member, and this sliding contact causes the stirring and conveying means to have a charge polarity different from that of the developer. A process cartridge characterized by being charged to the same polarity as that of the developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322315A JPH03181973A (en) | 1989-12-11 | 1989-12-11 | Developing device and process cartridge using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322315A JPH03181973A (en) | 1989-12-11 | 1989-12-11 | Developing device and process cartridge using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03181973A true JPH03181973A (en) | 1991-08-07 |
Family
ID=18142259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1322315A Pending JPH03181973A (en) | 1989-12-11 | 1989-12-11 | Developing device and process cartridge using same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03181973A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7072594B2 (en) | 2003-10-24 | 2006-07-04 | Canon Kabushiki Kaisha | Developing apparatus, process cartridge, and image forming apparatus |
| JP2014071259A (en) * | 2012-09-28 | 2014-04-21 | Brother Ind Ltd | Image forming apparatus |
| JP2015094929A (en) * | 2013-11-14 | 2015-05-18 | 株式会社リコー | Toner amount detection mechanism, developing device, process unit, and image forming apparatus |
-
1989
- 1989-12-11 JP JP1322315A patent/JPH03181973A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7072594B2 (en) | 2003-10-24 | 2006-07-04 | Canon Kabushiki Kaisha | Developing apparatus, process cartridge, and image forming apparatus |
| JP2014071259A (en) * | 2012-09-28 | 2014-04-21 | Brother Ind Ltd | Image forming apparatus |
| JP2015094929A (en) * | 2013-11-14 | 2015-05-18 | 株式会社リコー | Toner amount detection mechanism, developing device, process unit, and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2005055544A (en) | Developing cartridge, processing device and image forming apparatus | |
| JP2000352873A (en) | Electrophotographic image forming device, and processing cartridge adopted for the device | |
| US7756432B2 (en) | Image forming apparatus and cartridge having optical detection of toner amount | |
| JPS632087A (en) | Developing device | |
| JPH03181973A (en) | Developing device and process cartridge using same | |
| JP3736116B2 (en) | Image recording device | |
| JPH01316766A (en) | Developing device of image forming device | |
| JP2001356600A (en) | Process cartridge and image forming device | |
| JPH08220936A (en) | Electrophotographic recorder | |
| JP2002214906A (en) | Developing device and image forming device | |
| JPH096110A (en) | Developer cartridge, developing device, process cartridge and image forming device | |
| JP2820695B2 (en) | Process cartridge | |
| JP3826640B2 (en) | Developer supply device and image forming apparatus using the same | |
| JP2003186294A (en) | Developer container, process cartridge and electrophotographic image forming apparatus each using the container | |
| JP2576060B2 (en) | Toner supply device | |
| JPH06180542A (en) | Image forming device | |
| JP4371348B2 (en) | Image forming apparatus | |
| JPH0497179A (en) | Developing device and process cartridge | |
| JPH06180543A (en) | Cleaning device and process cartridge and image forming device | |
| JP2000194241A (en) | Image forming machine | |
| JPH09106182A (en) | Image forming device | |
| JP2000047524A (en) | Image forming device | |
| JPH0798538A (en) | Developer residual quantity detecting device | |
| JP6025417B2 (en) | Image forming apparatus and toner supply device | |
| JPH06110332A (en) | Empty toner detection device for developing device |