JP4785196B2 - Developing device and image forming apparatus - Google Patents

Developing device and image forming apparatus Download PDF

Info

Publication number
JP4785196B2
JP4785196B2 JP2006257912A JP2006257912A JP4785196B2 JP 4785196 B2 JP4785196 B2 JP 4785196B2 JP 2006257912 A JP2006257912 A JP 2006257912A JP 2006257912 A JP2006257912 A JP 2006257912A JP 4785196 B2 JP4785196 B2 JP 4785196B2
Authority
JP
Japan
Prior art keywords
support shaft
film member
developer
toner
cylindrical film
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 - Fee Related
Application number
JP2006257912A
Other languages
Japanese (ja)
Other versions
JP2008076891A (en
Inventor
貢 猪股
邦男 重田
旨宣 大久保
源 崔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority to JP2006257912A priority Critical patent/JP4785196B2/en
Priority to KR1020060117912A priority patent/KR101329737B1/en
Publication of JP2008076891A publication Critical patent/JP2008076891A/en
Application granted granted Critical
Publication of JP4785196B2 publication Critical patent/JP4785196B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Dry Development In Electrophotography (AREA)

Description

本発明は、現像装置に関し、より詳細には、電子写真方式の画像形成装置に用いられる現像装置に関する。   The present invention relates to a developing device, and more particularly to a developing device used in an electrophotographic image forming apparatus.

攪拌部材を備える従来の現像装置１は、図５に示すように、トナーを担持して移送する現像ローラ１０と、現像ローラ１０上のトナーの層規制を行うドクターブレード２０と、現像ローラ１０にトナーを供給し、また現像ローラ１０上の残トナーを剥離するＲＳ（Ｒｅｍｏｖｅ ａｎｄ Ｓｕｐｐｌｙ）ローラ３０と、トナーを攪拌する攪拌部材４０とから構成される。   As shown in FIG. 5, a conventional developing device 1 having a stirring member includes a developing roller 10 that carries and transports toner, a doctor blade 20 that regulates a toner layer on the developing roller 10, and a developing roller 10. An RS (Remove and Supply) roller 30 that supplies toner and removes residual toner on the developing roller 10 and a stirring member 40 that stirs the toner are configured.

かかる現像装置１では、トナー容器（図示せず。）から供給されたトナーは、トナー受け５０の上方に設けられた攪拌部材４０により攪拌されて、基台６０に固定されたドクターブレード２０と現像ローラ１０との間（トナー供給領域Ｃ）に供給される。供給されたトナーは、ドクターブレードによって帯電および薄層に形成され、現像ローラ１０に付着する。現像ローラ１０に担持されたトナーは静電潜像ローラ５と対向する位置で、潜像に応じて現像される。現像ローラ１０上に残像したトナーは、例えばスポンジ等の発泡体３１からなるＲＳローラ３０により機械的に剥離される。   In the developing device 1, the toner supplied from the toner container (not shown) is stirred by the stirring member 40 provided above the toner receiver 50 and developed with the doctor blade 20 fixed to the base 60. The toner is supplied between the rollers 10 (toner supply region C). The supplied toner is charged and formed into a thin layer by a doctor blade and adheres to the developing roller 10. The toner carried on the developing roller 10 is developed according to the latent image at a position facing the electrostatic latent image roller 5. The toner remaining on the developing roller 10 is mechanically peeled off by an RS roller 30 made of a foam 31 such as a sponge.

特開平１１−１６７２５４号公報JP-A-11-167254

しかし、図５に示す現像装置１は、現像ローラ１０へのトナー供給能力が低い。例えば、図６に示す現像装置１’は、現像ローラ１０と、ドクターブレード２０と、ＲＳローラ３０とから構成されるが、現像ローラ１０およびＲＳローラ３０を反時計回りに回転させることにより、現像ローラ１０とＲＳローラ３０との接触部上方にトナー溜まりが形成される。このため、現像ローラ１０とドクターブレード２０とにより形成される微小隙間に十分な量のトナーが供給される。これに対して、図５の現像装置１では、攪拌部材４０による圧力でドクターブレード２０と現像ローラ１０との当接部にトナーが押し込まれるだけであり、現像ローラ１０とＲＳローラ３０とが接触して直接トナーを微小隙間に供給する場合と比較して、トナー供給能力が低い。   However, the developing device 1 shown in FIG. 5 has a low toner supply capability to the developing roller 10. For example, the developing device 1 ′ shown in FIG. 6 includes a developing roller 10, a doctor blade 20, and an RS roller 30. By developing the developing roller 10 and the RS roller 30 counterclockwise, development is performed. A toner reservoir is formed above the contact portion between the roller 10 and the RS roller 30. Therefore, a sufficient amount of toner is supplied to the minute gap formed by the developing roller 10 and the doctor blade 20. On the other hand, in the developing device 1 of FIG. 5, the toner is only pushed into the contact portion between the doctor blade 20 and the developing roller 10 by the pressure of the stirring member 40, and the developing roller 10 and the RS roller 30 are in contact with each other. As a result, the toner supply capability is low compared to the case where the toner is directly supplied to the minute gap.

このような問題に対して、例えばトナー供給領域Ｃに滞留するトナーを、現像ローラ１０とドクターブレード２０との間に積極的に供給するために、ＲＳローラ３０と同様のローラをトナー供給領域Ｃに備えることが考えられる。しかし、発泡体層３１によりトナーの供給および剥離を行うためには発泡体層３１の厚さが最低でも約３ｍｍ必要であり、中心軸径も考慮すると、直径が約１０ｍｍのローラとなってしまう。このため、ローラの配置の制約やコストの問題から望ましくない。   For such a problem, for example, in order to positively supply the toner staying in the toner supply area C between the developing roller 10 and the doctor blade 20, a roller similar to the RS roller 30 is provided in the toner supply area C. It is possible to prepare for this. However, in order to supply and remove the toner by the foam layer 31, the thickness of the foam layer 31 needs to be at least about 3 mm, and considering the central axis diameter, the roller has a diameter of about 10 mm. . For this reason, it is not desirable because of restrictions on the arrangement of rollers and cost problems.

また、上記のようなローラを設けない場合には、トナー供給領域Ｃにトナーが滞留してしまい、現像ローラ１０とドクターブレード２０との間へのトナー供給量が変動しやすい。このため、現像ローラ１０上のトナー層の厚さが変動し、画質の劣化が生じてしまう。したがって、トナー供給領域Ｃにローラを設けることが望ましいが、上述したようにトナー供給能力のあるローラの配置は難しく、どうしても必要な場合には、攪拌機能のみを有した軸が設けられる。   Further, when the roller as described above is not provided, the toner stays in the toner supply region C, and the amount of toner supplied between the developing roller 10 and the doctor blade 20 is likely to fluctuate. For this reason, the thickness of the toner layer on the developing roller 10 fluctuates and the image quality deteriorates. Therefore, it is desirable to provide a roller in the toner supply region C. However, as described above, it is difficult to dispose a roller having a toner supply capability. If absolutely necessary, a shaft having only a stirring function is provided.

そこで、本発明は、上記問題に鑑みてなされたものであり、本発明の目的とするところは、小型でかつトナー供給能力を有する供給部材を備えた、新規かつ改良された現像装置を提供することにある。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved developing device having a small-sized supply member having toner supply capability. There is.

上記課題を解決するために、本発明のある観点によれば、周面に現像剤を担持して移送する現像剤担持体と、現像剤担持体下部側の現像剤供給領域に、現像剤担持体に近接または接触して配置された筒状フィルム部材と、筒状フィルム部材に内挿され、筒状フィルム部材を回転自在に支持する支持軸と、を備え、前記支持軸は、回動不能に固定され、このとき、現像剤担持体と支持軸との間に筒状フィルム部材を現像剤担持体に静電吸着させる向きの電界が形成されるように、支持軸に電圧が印加される現像装置が提供される。
すなわち、本発明にかかる支持軸および現像剤担持体に電圧を印加して電界を形成することにより、筒状フィルム部材は静電吸着力によって現像剤担持体に吸着され、所定の幅のニップが形成される。また、筒状フィルム部材と支持軸との間には、わずかな隙間が設けられている。これにより、筒状フィルム部材は、現像剤担持体の回転に伴って回転するようになる。 In order to solve the above-described problems, according to one aspect of the present invention, a developer carrying body that carries and transports a developer on a peripheral surface, and a developer carrying area on a developer supply area on the lower side of the developer carrying body. A cylindrical film member disposed close to or in contact with the body, and a support shaft that is inserted in the cylindrical film member and rotatably supports the cylindrical film member, and the support shaft is not rotatable At this time, a voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft so that the cylindrical film member is electrostatically attracted to the developer carrier. A developing device is provided.
Ie, by forming an electric field by applying a voltage to the support shaft and a developer carrying member according to the present invention, the tubular film member is attracted to the developer carrying member by electrostatic attraction force, the predetermined width A nip is formed. A slight gap is provided between the tubular film member and the support shaft. Thereby, the cylindrical film member comes to rotate with the rotation of the developer carrier.

本発明によれば、現像剤が滞留し易い現像剤供給領域に、筒状フィルム部材と支持軸とからなるトナー移送部材が設けられる。筒状フィルム部材は有軟性を有する材質から形成され、支持軸の外周面と筒状フィルム部材との間には微小な隙間が設けられている。かかる構成により、筒状フィルム部材は支持軸の周りを回転することができ、現像剤担持体と筒状フィルム部材との間を通過する現像剤を積極的に移送することができる。   According to the present invention, the toner transfer member including the cylindrical film member and the support shaft is provided in the developer supply region where the developer is likely to stay. The tubular film member is formed of a soft material, and a minute gap is provided between the outer peripheral surface of the support shaft and the tubular film member. With this configuration, the cylindrical film member can rotate around the support shaft, and the developer passing between the developer carrier and the cylindrical film member can be positively transferred.

また、現像剤担持体と支持軸との間に筒状フィルム部材を支持軸に静電吸着される向きの電界が形成されるように、支持軸に電圧が印加される。このとき、筒状フィルム部材の内周面が支持軸の外周面に接触する部分が多くなるため、筒状フィルム部材は、現像剤担持体の回転によっても回転しなくなる。すなわち、筒状フィルム部材は、現像剤担持体の回転に対して滑りを生じるようになる。このような状態で現像剤がニップを通過することにより、現像剤を層規制するとともに帯電させることができる。   Further, a voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft in a direction in which the cylindrical film member is electrostatically attracted to the support shaft. At this time, since the portion where the inner peripheral surface of the cylindrical film member contacts the outer peripheral surface of the support shaft increases, the cylindrical film member does not rotate even when the developer carrying member rotates. In other words, the tubular film member slips with respect to the rotation of the developer carrier. When the developer passes through the nip in such a state, the developer can be regulated and charged.

また、支持軸は、回動可能に設けることもできる。このとき、現像剤担持体と支持軸との間に筒状フィルム部材を支持軸に静電吸着させる向きの電界が形成されるように、支持軸に電圧が印加される。このとき、支持軸と筒状フィルム部材は、一体に回転するようになる。これにより、非現像時には支持軸とともに筒状フィルムを回転させて、筒状フィルム部材の現像剤担持体との対向面を変えることができる。また、現像時には、支持軸を回転しないように固定して、現像剤を層規制するとともに帯電させることができる。   Further, the support shaft can be provided so as to be rotatable. At this time, a voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft in a direction in which the cylindrical film member is electrostatically attracted to the support shaft. At this time, the support shaft and the tubular film member rotate integrally. Thereby, at the time of non-development, the cylindrical film can be rotated together with the support shaft to change the surface of the cylindrical film member facing the developer carrier. Also, during development, the support shaft can be fixed so as not to rotate, and the developer can be regulated and charged.

このような現像装置は、例えばプリンタ等の画像形成装置に用いることができる。   Such a developing device can be used in an image forming apparatus such as a printer.

以上説明したように本発明によれば、小型でかつトナー供給能力を有する供給部材を備えた現像装置を提供することができる。   As described above, according to the present invention, it is possible to provide a developing device including a supply member that is small in size and has a toner supply capability.

以下に添付図面を参照しながら、本発明の好適な実施の形態について詳細に説明する。なお、本明細書及び図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。   Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

（第１の実施形態）
まず、図１および図２に基づいて、本発明の第１の実施形態にかかる現像装置１００について説明する。なお、図１は、本実施形態にかかる現像装置１００の概略構成を示す説明図である。図２は、本実施形態にかかるトナー移送部材１７０の作用を説明するための説明図である。 (First embodiment)
First, the developing device 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an explanatory diagram showing a schematic configuration of the developing device 100 according to the present embodiment. FIG. 2 is an explanatory diagram for explaining the operation of the toner transfer member 170 according to the present embodiment.

本実施形態にかかる現像装置１００は、図１に示すように、現像剤であるトナーを担持して移送する現像ローラ１１０と、現像ローラ１１０上のトナーの層規制を行い、トナーを帯電させるための層規制帯電ブレード１２０と、現像ローラ１１０上の残トナーを回収するＲＳローラ１３０と、トナーを攪拌する攪拌部材１４０と、トナー供給領域に設けられるトナー移送部材１７０とを備える。   As shown in FIG. 1, the developing device 100 according to this embodiment carries a toner roller that carries and transports toner as a developer, and controls the toner layer on the developing roller 110 to charge the toner. A layer regulating charging blade 120, an RS roller 130 for collecting the residual toner on the developing roller 110, a stirring member 140 for stirring the toner, and a toner transfer member 170 provided in the toner supply region.

現像ローラ１１０は、その外周面に現像剤であるトナーを担持して移送する略円柱形状の現像剤担持体であり、図１紙面奥方向に延びるように配置される。現像ローラ１１０は、回転することによりトナーを移送して、静電潜像を現像するためのトナーを静電潜像ローラ１０５に供給する。現像ローラ１１０は、静電潜像ローラ１０５と近接して設けられており、静電潜像ローラ１０５との間に電界を形成するために電圧Ｖ１が印加される。例えば、現像ローラ１１０と静電潜像ローラ１０５との電位差が約４００Ｖとなるように、現像ローラ１１０に電圧Ｖ１が印加される。 The developing roller 110 is a substantially cylindrical developer carrying member that carries and transports toner, which is a developer, on the outer peripheral surface thereof, and is arranged to extend in the depth direction in FIG. The developing roller 110 rotates to transfer toner and supply the electrostatic latent image roller 105 with toner for developing the electrostatic latent image. The developing roller 110 is provided close to the electrostatic latent image roller 105, and a voltage V 1 is applied to form an electric field between the developing roller 110 and the electrostatic latent image roller 105. For example, the voltage V 1 is applied to the developing roller 110 so that the potential difference between the developing roller 110 and the electrostatic latent image roller 105 is about 400V.

層規制帯電ブレード１２０は、トナーの層規制および帯電を行う機能部であり、例えば導電性材質からなる板状部材で形成される。層規制帯電ブレード１２０は、その一面が現像ローラ１１０の外周面と対向して設けられている。現像ローラ１１０の回転方向上流側には、現像ローラ１１０と層規制帯電ブレード１２０との間にトナーを導入するためのトナー供給領域が形成されている。また、現像ローラ１１０の回転方向下流側では、トナーの層規制を行いつつ帯電させるように、近接して設けられている。また、層規制帯電ブレードの一端は、基台１６０に支持されて固定されている。   The layer regulation charging blade 120 is a functional unit that performs toner layer regulation and charging, and is formed of, for example, a plate-like member made of a conductive material. One surface of the layer-regulating charging blade 120 is provided to face the outer peripheral surface of the developing roller 110. A toner supply region for introducing toner is formed between the developing roller 110 and the layer regulating charging blade 120 on the upstream side in the rotation direction of the developing roller 110. Further, on the downstream side in the rotation direction of the developing roller 110, they are provided close to each other so as to be charged while regulating the toner layer. Further, one end of the layer regulation charging blade is supported and fixed to the base 160.

ＲＳローラ１３０は、静電潜像ローラ１０５に付着せずに現像ローラ１１０に残像したトナーを回収する回収部材として機能する。ＲＳローラ１３０の外周部はスポンジ層１３１となっており、現像ローラ１１０に圧接して配置される。ＲＳローラ１３０には、例えば現像ローラ１１０とほぼ等電位となるように電圧が印加される。なお、本実施形態では回収部材としてＲＳローラ１３０を用いたが、本発明はかかる例に限定されない。   The RS roller 130 functions as a collecting member that collects the toner that does not adhere to the electrostatic latent image roller 105 and remains on the developing roller 110. The outer peripheral portion of the RS roller 130 is a sponge layer 131 and is disposed in pressure contact with the developing roller 110. For example, a voltage is applied to the RS roller 130 so as to have substantially the same potential as the developing roller 110. In the present embodiment, the RS roller 130 is used as the collecting member, but the present invention is not limited to this example.

攪拌部材１４０は、現像ローラ１１０に供給されるトナーを攪拌する部材である。攪拌部材１４０には、ＲＳローラ１３０によって回収された現像ローラ１１０上の残トナーと新たに供給されるトナーとが供給され、時計回りに回転する攪拌部材１４０によって攪拌される。攪拌部材１４０は、図１に示すように、例えば回転軸に略等間隔に設けられた４つの羽状部材１４１を備える。攪拌部材１４０の回転軸を回転させて羽状部材１４１を回転することにより、トナー供給領域へ供給する。   The stirring member 140 is a member that stirs the toner supplied to the developing roller 110. The stirring member 140 is supplied with the remaining toner on the developing roller 110 collected by the RS roller 130 and the newly supplied toner, and is stirred by the stirring member 140 that rotates clockwise. As shown in FIG. 1, the stirring member 140 includes, for example, four wing-shaped members 141 provided on the rotating shaft at substantially equal intervals. The rotating shaft of the stirring member 140 is rotated to rotate the wing member 141, thereby supplying the toner supply region.

トナー移送部材１７０は、トナーを移送する筒状フィルム部材１７１と、筒状フィルム部材１７１に内挿された支持軸１７３とからなる。筒状フィルム部材１７１は、中抵抗、望ましくは約１０４〜１０９Ω・ｃｍの抵抗値（体積抵抗値もしくは表面抵抗値）の材質から形成される中抵抗層を少なくとも含む。中抵抗層は、例えばポリイミド、ポリカーボネイト、ポリアミド等を主とした高分子フィルムから形成される。筒状フィルム部材１７１の厚さは、約５０〜５００μｍに形成される。 The toner transfer member 170 includes a cylindrical film member 171 that transfers toner and a support shaft 173 that is inserted into the cylindrical film member 171. The tubular film member 171 includes at least a medium resistance layer formed of a material having a medium resistance, preferably a resistance value (volume resistance value or surface resistance value) of about 10 4 to 10 9 Ω · cm. The middle resistance layer is formed from a polymer film mainly composed of polyimide, polycarbonate, polyamide, or the like. The thickness of the tubular film member 171 is about 50 to 500 μm.

支持軸１７３は、筒状フィルム部材１７１を回転可能に支持する軸であり、支持軸１７３自体は回転不能に固定されている。支持軸１７３は、例えばアルミニウム等の金属から形成され、その直径は約４〜５ｍｍに形成されている。また、支持軸１７３には電圧Ｖ２が印加され、接触より筒状フィルム部材１７１に電圧を供給する。現像ローラ１１０と支持軸１７３との電位差がない状態（初期状態）において、支持軸１７３の外周面と筒状フィルム部材１７１の内周面との間にはわずかな隙間が設けられている。このため、筒状フィルム部材１７１は支持軸１７３の周りを回転することができる。ここで、支持軸１７３の外周面と筒状フィルム部材１７１の内周面を摺動性のよい材質から形成することにより、筒状フィルム部材１７１の回転が容易になる。また、初期状態において、筒状フィルム部材１７１は、現像ローラ１１０の外周面と近接または接触するように設けられる。 The support shaft 173 is a shaft that rotatably supports the tubular film member 171, and the support shaft 173 itself is fixed so as not to rotate. The support shaft 173 is made of, for example, a metal such as aluminum and has a diameter of about 4 to 5 mm. Further, the voltage V 2 is applied to the support shaft 173, and supplies the voltage to the tubular film member 171 than the contact. In a state where there is no potential difference between the developing roller 110 and the support shaft 173 (initial state), a slight gap is provided between the outer peripheral surface of the support shaft 173 and the inner peripheral surface of the cylindrical film member 171. For this reason, the cylindrical film member 171 can rotate around the support shaft 173. Here, the cylindrical film member 171 can be easily rotated by forming the outer peripheral surface of the support shaft 173 and the inner peripheral surface of the cylindrical film member 171 from a material having good slidability. In the initial state, the tubular film member 171 is provided so as to be close to or in contact with the outer peripheral surface of the developing roller 110.

また、本実施形態にかかる現像装置１００は、現像装置１００を構成する各部材に印加する電圧を制御する電圧制御部（図示せず。）を備える。電圧制御部は、現像ローラ１１０および支持軸１７３に印加する電圧を制御する。各部材の電圧を制御することにより、現像ローラ１１０と支持軸１７３との間に形成される電界の強さを制御することができる。   Further, the developing device 100 according to the present embodiment includes a voltage control unit (not shown) that controls the voltage applied to each member constituting the developing device 100. The voltage control unit controls the voltage applied to the developing roller 110 and the support shaft 173. By controlling the voltage of each member, the strength of the electric field formed between the developing roller 110 and the support shaft 173 can be controlled.

以上、本実施形態にかかる現像装置１００の構成について説明した。本実施形態の現像装置１００は、攪拌部材１４０から供給されるトナーを移送するトナー移送部材１７０を備えることを特徴とする。以下、本実施形態の現像装置１００におけるトナーの循環、特にトナー移送部材１７０の作用について説明する。   The configuration of the developing device 100 according to the present embodiment has been described above. The developing device 100 according to the present embodiment includes a toner transfer member 170 that transfers toner supplied from the stirring member 140. Hereinafter, the toner circulation in the developing device 100 of the present embodiment, particularly the operation of the toner transfer member 170 will be described.

本実施形態にかかる現像装置１００では、まず、攪拌部材１４０により攪拌されたトナーがトナー供給領域に供給される。トナー供給領域は、現像ローラ１１０と層規制帯電ブレード１２０により形成される領域であり、かかる領域にはトナー移送部材１７０が設けられている。攪拌部材１４０により供給されるトナーは、トナー移送部材１７０によって層規制帯電ブレード１２０の現像ローラ回転方向下流側に向かって積極的に移送される。   In the developing device 100 according to the present embodiment, first, the toner stirred by the stirring member 140 is supplied to the toner supply region. The toner supply area is an area formed by the developing roller 110 and the layer regulating charging blade 120, and a toner transfer member 170 is provided in this area. The toner supplied by the stirring member 140 is positively transferred by the toner transfer member 170 toward the downstream side in the rotation direction of the developing roller of the layer regulating charging blade 120.

より詳細に説明すると、トナー移送部材１７０によってトナーを移送するとき、支持軸１７３には所定の電圧Ｖ２が印加される。一方、現像ローラ１１０には、静電潜像ローラ１０５との間に電界を形成するために電圧Ｖ１が印加されているため、支持軸１７３と現像ローラ１１０との間には電界が形成される。電界は、筒状フィルム部材１７１を現像ローラ１１０の外周面に静電吸着させるような向きに形成される。これにより、筒状フィルム部材１７１は静電吸着力Ｎ１によって現像ローラ１１０に吸着され、現像ローラ１１０と接触して所定の幅、例えば約１〜２ｍｍのニップを形成する。ここで、筒状フィルム部材１７１と支持軸１７３との間には微小な隙間が設けられている。このため、筒状フィルム部材１７１は現像ローラ１１０の回転に伴って、回動不能に固定された支持軸１７３の周りを回転する。 More particularly, when transferring the toner by the toner transfer member 170, the predetermined voltage V 2 is applied to the support shaft 173. On the other hand, since the voltage V 1 is applied to the developing roller 110 to form an electric field between the developing roller 110 and the electrostatic latent image roller 105, an electric field is formed between the support shaft 173 and the developing roller 110. The The electric field is formed in such a direction that the cylindrical film member 171 is electrostatically attracted to the outer peripheral surface of the developing roller 110. Thus, the tubular film member 171 is attracted to the developing roller 110 by an electrostatic attraction force N 1, to form a predetermined width in contact with the developing roller 110, for example, a nip of approximately 1 to 2 mm. Here, a minute gap is provided between the tubular film member 171 and the support shaft 173. Therefore, the cylindrical film member 171 rotates around the support shaft 173 that is fixed so as not to rotate as the developing roller 110 rotates.

かかるトナー移送部材１７０は、上述したように、支持軸１７３の外周面および筒状フィルム部材１７１の内周面は摩擦係数が極力小さくなるように、摺動性のよい材質、例えばフッ素等がコーティングされている。この微小な摩擦係数と静電吸着力Ｎ１との関係より、筒状フィルム部材１７１と支持軸１７３との間ですべりが生じる。したがって、筒状フィルム部材１７１は、支持軸１７３に大きな外力をかけることなく、固定された支持軸１７３の周りを安定して回転可能となる。また、筒状フィルム部材１７１は、現像ローラ１１０の回転に伴って回転するため、筒状フィルム部材１７１を回転させるための駆動機構も不要である。このように、非常に小径であり、かつトナー移送能力を有するローラが構成される。 As described above, the toner transfer member 170 is coated on the outer peripheral surface of the support shaft 173 and the inner peripheral surface of the cylindrical film member 171 with a material having good slidability such as fluorine so that the friction coefficient is minimized. Has been. The relationship between the small friction coefficient and the electrostatic adsorption force N 1, slippage occurs between the tubular film member 171 and the support shaft 173. Therefore, the cylindrical film member 171 can be stably rotated around the fixed support shaft 173 without applying a large external force to the support shaft 173. Moreover, since the cylindrical film member 171 rotates with the rotation of the developing roller 110, a driving mechanism for rotating the cylindrical film member 171 is not necessary. In this manner, a roller having a very small diameter and having a toner transfer capability is configured.

なお、筒状フィルム部材１７１と支持軸１７３との間にもわずかに静電気的な吸着力が発生している。このため、筒状フィルム部材１７１は支持軸１７３に多少静電吸着するが、その巻付き角は小さく、支持軸１７３の外周面および筒状フィルム部材１７１の内周面の摩擦係数は微小であるため、筒状フィルム部材１７１に大きな力は働かない。したがって、筒状フィルム部材１７１は支持軸１７３の周りを回転することができる。   A slight electrostatic attracting force is also generated between the tubular film member 171 and the support shaft 173. Therefore, the cylindrical film member 171 is slightly electrostatically attracted to the support shaft 173, but the winding angle is small, and the friction coefficient between the outer peripheral surface of the support shaft 173 and the inner peripheral surface of the cylindrical film member 171 is very small. Therefore, a large force does not act on the tubular film member 171. Therefore, the cylindrical film member 171 can rotate around the support shaft 173.

トナー移送部材１７０により層規制帯電ブレード１２０の現像ローラ回転方向下流側に移送されたトナーは、現像ローラ１１０と層規制帯電ブレード１２０との間を通過することにより、層規制されつつ帯電される。均一に層規制され、帯電したトナーは、現像ローラ１１０に付着して静電潜像ローラ１０５との対向部まで移送され、静電潜像に応じて現像ローラ１１０から静電潜像ローラ１０５に付着する。一方、現像ローラ１１０の残トナーは、ＲＳローラ１３０により回収される。ＲＳローラ１３０によって回収された残トナーは、攪拌部材１４０に供給されて、トナー容器（図示せず。）から供給される新しいトナーとともに攪拌される。そして、攪拌されたトナーは、トナー供給領域に供給される。   The toner transferred by the toner transfer member 170 to the downstream side of the layer regulating charging blade 120 in the rotation direction of the developing roller passes through between the developing roller 110 and the layer regulating charging blade 120 and is charged while regulating the layer. The uniformly regulated layered and charged toner adheres to the developing roller 110 and is transferred to a portion facing the electrostatic latent image roller 105, and from the developing roller 110 to the electrostatic latent image roller 105 according to the electrostatic latent image. Adhere to. On the other hand, the residual toner on the developing roller 110 is collected by the RS roller 130. The residual toner collected by the RS roller 130 is supplied to the stirring member 140 and stirred together with new toner supplied from a toner container (not shown). Then, the agitated toner is supplied to the toner supply area.

以上、第１の実施形態にかかる現像装置１００について説明した。かかる現像装置１００によれば、攪拌部材１４０から供給されるトナーを移送するトナー移送部材１７０を、トナーが滞留し易いトナー供給領域に設けられる。トナー移送部材１７０は、回動不能に固定された支持軸１７３と、支持軸１７３によって回動可能に支持された筒状フィルム部材１７１とからなり、支持軸１７３と現像ローラ１１０との間には、筒状フィルム部材１７１を現像ローラ１１０に静電吸着する向きの電界が形成される。これにより、現像ローラ１１０の回転に伴い、筒状フィルム部材１７１は安定して回転する。このように、筒状フィルム部材１７１を回転させる駆動機構も不要であり、小径でかつトナー移送能力を備えるローラを形成することができる。   The developing device 100 according to the first embodiment has been described above. According to the developing device 100, the toner transfer member 170 that transfers the toner supplied from the stirring member 140 is provided in the toner supply region where the toner tends to stay. The toner transfer member 170 includes a support shaft 173 that is fixed to be unrotatable and a cylindrical film member 171 that is rotatably supported by the support shaft 173, and is disposed between the support shaft 173 and the developing roller 110. Then, an electric field is formed in such a direction that the cylindrical film member 171 is electrostatically attracted to the developing roller 110. Thereby, the cylindrical film member 171 rotates stably with the rotation of the developing roller 110. Thus, a driving mechanism for rotating the tubular film member 171 is not required, and a roller having a small diameter and a toner transfer capability can be formed.

（第２の実施形態）
次に、図３および図４に基づいて、本発明の第２の実施形態にかかる現像装置２００について説明する。なお、図３は、本実施形態にかかる現像装置２００の概略構成を示す説明図である。図４は、本実施形態にかかる筒状フィルム部材２７１の作用を説明するための説明図である。 (Second Embodiment)
Next, a developing device 200 according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 3 is an explanatory diagram showing a schematic configuration of the developing device 200 according to the present embodiment. FIG. 4 is an explanatory diagram for explaining the operation of the tubular film member 271 according to the present embodiment.

本実施形態にかかる現像装置２００は、図３に示すように、現像剤であるトナーを担持して移送する現像ローラ２１０と、現像ローラ２１０上の残トナーを剥離するＲＳローラ２３０と、トナーを攪拌する攪拌部材２４０と、トナー供給領域に設けられるトナー移送部材２７０とを備える。   As shown in FIG. 3, the developing device 200 according to the present embodiment includes a developing roller 210 that carries and transports toner as a developer, an RS roller 230 that peels off residual toner on the developing roller 210, and toner. An agitation member 240 for agitation and a toner transfer member 270 provided in the toner supply region are provided.

これらの各部材は、第１の実施形態と同様に構成されている。本実施形態の現像装置２００のトナー移送部材２７０は、第１の実施形態にかかる現像装置１００と比較して、トナー移送能力に加え、トナーの層規制および帯電も可能である点で相違する。このため、現像装置２００には、トナーの層規制および帯電を行うための層規制帯電ブレードを備えなくともよい。以下、本実施形態にかかるトナー移送部材２７０の作用について詳細に説明する。   Each of these members is configured similarly to the first embodiment. The toner transfer member 270 of the developing device 200 according to the present embodiment is different from the developing device 100 according to the first embodiment in that the toner transfer capability, toner layer regulation and charging can be performed. For this reason, the developing device 200 may not include a layer regulation charging blade for regulating and charging the toner layer. Hereinafter, the operation of the toner transfer member 270 according to the present embodiment will be described in detail.

トナー移送部材２７０は、第１の実施形態と同様、柔軟性を有する筒状フィルム部材２７１と、筒状フィルム部材２７１に内挿された支持軸２７３とからなる。支持軸２７３には電圧Ｖ２が印加され、接触より筒状フィルム部材２７１に電圧を供給する。現像ローラ２１０と支持軸２７３との電位差がない状態（初期状態）において、支持軸２７３の外周面と筒状フィルム部材２７１の内周面との間には、第１の実施形態と同様、わずかな隙間が設けられている。 As in the first embodiment, the toner transfer member 270 includes a flexible tubular film member 271 and a support shaft 273 inserted in the tubular film member 271. Voltage V 2 is applied to the support shaft 273, and supplies the voltage to the tubular film member 271 than the contact. In a state where there is no potential difference between the developing roller 210 and the support shaft 273 (initial state), there is a slight gap between the outer peripheral surface of the support shaft 273 and the inner peripheral surface of the cylindrical film member 271 as in the first embodiment. Gaps are provided.

本実施形態において、支持軸２７３に印加される電圧Ｖ２は第１の実施形態における電圧Ｖ２よりも大きく、支持軸２７３と現像ローラ２１０との間に、帯電したトナーが現像ローラ２１０に吸着する方向の電界が形成されるように設定される。かかる電界により、筒状フィルム部材２７１は静電吸着力Ｎ１によって現像ローラ２１０に静電吸着され、筒状フィルム部材２７１と現像ローラ２１０とによって所定の幅、例えば約１〜２ｍｍのニップが形成される。このとき、筒状フィルム部材２７１の外周面の摩擦係数μ１と静電吸着力Ｎ１との関係より、現像ローラ２１０と筒状フィルム部材２７１との間で力Ｆ１が生じる。 In this embodiment, the voltage V 2 applied to the support shaft 273 is larger than the voltage V 2 in the first embodiment, and the charged toner is attracted to the development roller 210 between the support shaft 273 and the development roller 210. It is set so that an electric field in the direction to be formed is formed. Such an electric field, the tubular film member 271 is electrostatically attracted to the developing roller 210 by an electrostatic attraction force N 1, a predetermined width by a tubular film member 271 and the developing roller 210, for example, the nip of from about 1~2mm is formed Is done. At this time, a force F 1 is generated between the developing roller 210 and the tubular film member 271 due to the relationship between the friction coefficient μ 1 of the outer peripheral surface of the tubular film member 271 and the electrostatic adsorption force N 1 .

ここで、図４に示すように、筒状フィルム部材２７１と支持軸２７３との間にも静電気的な吸着力Ｎ２が発生している。しかしながら、筒状フィルム部材２７１の内周面と支持軸２７３の外周面との間には、微小な隙間しか存在しない。この筒状フィルム部材２７１の内周面と支持軸２７３の外周面との微小な隙間は、第１の実施形態の場合と比較して小さいことが望ましい。このため、筒状フィルム部材２７１が支持軸２７３に接触する領域は大きくなる。すなわち、筒状フィルム部材２７１と支持軸２７３とが吸着する角度（巻付け角）が大きくなり、結果として筒状フィルム部材２７１は支持軸２７３に静電吸着した状態となる。 Here, as shown in FIG. 4, an electrostatic adsorption force N 2 is also generated between the tubular film member 271 and the support shaft 273. However, only a minute gap exists between the inner peripheral surface of the tubular film member 271 and the outer peripheral surface of the support shaft 273. It is desirable that the minute gap between the inner peripheral surface of the tubular film member 271 and the outer peripheral surface of the support shaft 273 is small compared to the case of the first embodiment. For this reason, the area | region where the cylindrical film member 271 contacts the support shaft 273 becomes large. That is, the angle (winding angle) at which the tubular film member 271 and the support shaft 273 are attracted increases, and as a result, the tubular film member 271 is electrostatically attracted to the support shaft 273.

このとき、筒状フィルム部材２７１の内周面の摩擦係数μ２と静電吸着力Ｎ２との関係より、筒状フィルム部材２７１の内周面と支持軸２７３の外周面との間で力Ｆ２が生じる。したがって、筒状フィルム部材２７１は、現像ローラ２１０が回転しても力Ｆ１および力Ｆ２の働きによって支持軸２７３の周りを回転しないようになり、筒状フィルム部材２７１と現像ローラ２１０との間に滑りを生じさせる。 At this time, the force between the inner peripheral surface of the cylindrical film member 271 and the outer peripheral surface of the support shaft 273 is determined from the relationship between the friction coefficient μ 2 of the inner peripheral surface of the cylindrical film member 271 and the electrostatic adsorption force N 2. F 2 is produced. Therefore, the cylindrical film member 271 does not rotate around the support shaft 273 by the action of the force F 1 and the force F 2 even when the developing roller 210 rotates, and the cylindrical film member 271 and the developing roller 210 do not rotate. Causes slippage between them.

筒状フィルム部材２７１と現像ローラ２１０との間で滑りが生じた状態において、筒状フィルム部材２７１と現像ローラ２１０との間にトナーが導入されると、トナーは筒状フィルム部材２７１とのすべりによって摩擦帯電されるとともに（図４におけるグレーのトナー）、筒状フィルム部材２７１が現像ローラ２１０に吸着する力を受けて薄層に形成される。このように、トナー移送部材２７０をトナー供給領域に設けることにより、攪拌部材によって供給されたトナーが現像ローラ２１０と筒状フィルム部材２７１との間に取り込まれ易くなり、トナーの供給が潤滑に行われるようになる。また、筒状フィルム部材２７１を支持軸２７３に吸着させて回転しないようにし、現像ローラ２１０との間に滑りを生じさせることによってトナーの層規制を行いつつ帯電させることができる。   When the toner is introduced between the tubular film member 271 and the developing roller 210 in a state where the sliding occurs between the tubular film member 271 and the developing roller 210, the toner slides with the tubular film member 271. The cylindrical film member 271 receives a force that is attracted to the developing roller 210 and is formed into a thin layer. As described above, by providing the toner transfer member 270 in the toner supply region, the toner supplied by the stirring member can be easily taken in between the developing roller 210 and the cylindrical film member 271, and the toner supply is lubricated. Will come to be. Further, the cylindrical film member 271 is attracted to the support shaft 273 so as not to rotate, and can be charged while regulating the toner layer by causing slippage between the cylindrical film member 271 and the developing roller 210.

一方、非画像形成時に、筒状フィルム部材２７１と現像ローラ２１０との間に形成される電界をオフにすると、筒状フィルム部材２７１の支持軸への吸着力が若干弱まる。このため、筒状フィルム部材２７１は、現像ローラ２１０の回転に伴って若干回転される。これにより、筒状フィルム部材２７１の現像ローラ２１０に対向する部分を変えることができる。したがって、筒状フィルム部材２７１の現像ローラ１１０と対向する面を順次変えることにより、筒状フィルム部材２７１表面への逆帯電トナー等の付着、滞留を解消することができる。これにより、筒状フィルム部材２７１のトナーの帯電および層規制部の長寿命化を図ることができる。   On the other hand, when the electric field formed between the tubular film member 271 and the developing roller 210 is turned off during non-image formation, the attractive force of the tubular film member 271 on the support shaft is slightly weakened. For this reason, the cylindrical film member 271 is slightly rotated as the developing roller 210 rotates. Thereby, the part facing the developing roller 210 of the cylindrical film member 271 can be changed. Therefore, by sequentially changing the surface of the cylindrical film member 271 that faces the developing roller 110, adhesion and retention of reversely charged toner or the like on the surface of the cylindrical film member 271 can be eliminated. As a result, the toner of the cylindrical film member 271 can be charged and the life of the layer restricting portion can be extended.

以上、第２の実施形態にかかる現像装置２００について説明した。かかる現像装置２００によれば、攪拌部材２４０から供給されるトナーを移送するトナー移送部材２７０が、トナーが滞留し易いトナー供給領域に設けられる。トナー移送部材２７０は、回動不能に固定された支持軸２７３と、支持軸２７３によって回動可能に支持された筒状フィルム部材２７１とからなり、支持軸２７３と現像ローラ２１０との間には、筒状フィルム部材２７１を現像ローラ２１０に静電吸着する向きの電界が形成される。このとき、筒状フィルム部材２７１には現像ローラ２１０に吸着する向きの静電吸着力が働くとともに、支持軸２７３に吸着する向きの静電吸着力が強く働く。このため、筒状フィルム部材２７１は支持軸２７３に吸着し、現像ローラ２１０と滑りを生じる。これにより、トナーを現像ローラ２１０と筒状フィルム部材２７１との間に導入し易くなるとともに、トナーの層規制および帯電させることができる。   The developing device 200 according to the second embodiment has been described above. According to the developing device 200, the toner transfer member 270 that transfers the toner supplied from the stirring member 240 is provided in the toner supply region where the toner tends to stay. The toner transfer member 270 includes a support shaft 273 that is fixed to be unrotatable and a cylindrical film member 271 that is rotatably supported by the support shaft 273, and between the support shaft 273 and the developing roller 210. Then, an electric field is formed in such a direction that the cylindrical film member 271 is electrostatically attracted to the developing roller 210. At this time, the electrostatic attracting force in the direction of attracting to the developing roller 210 acts on the cylindrical film member 271, and the electrostatic attracting force in the direction of attracting to the support shaft 273 acts strongly. For this reason, the tubular film member 271 is attracted to the support shaft 273 and slips with the developing roller 210. Accordingly, the toner can be easily introduced between the developing roller 210 and the cylindrical film member 271, and the toner layer can be regulated and charged.

以上、添付図面を参照しながら本発明の好適な実施形態について説明したが、本発明は係る例に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

例えば、上記実施形態では、支持軸は回転不能に固定されたが、本発明はかかる例に限定されず、回転可能に設けてもよい。この場合、現像時には支持軸の回転を停止して、筒状フィルム部材と現像ローラ間でトナーの帯電および層規制を行う。一方、非画像形成時には、電界が形成されたままの状態で支持軸を少し回転させて、現像ローラとの対向面を変更する。電界が形成されたままの状態では、筒状フィルム部材は支持軸に静電吸着しているため、筒状フィルム部材と支持軸とが一体となって回転する。   For example, in the above-described embodiment, the support shaft is fixed so as not to rotate. However, the present invention is not limited to such an example and may be provided so as to be rotatable. In this case, the rotation of the support shaft is stopped during development, and toner charging and layer regulation are performed between the cylindrical film member and the developing roller. On the other hand, at the time of non-image formation, the support shaft is slightly rotated with the electric field still formed to change the surface facing the developing roller. In the state where the electric field is still formed, the cylindrical film member is electrostatically adsorbed to the support shaft, so the cylindrical film member and the support shaft rotate together.

また、上記第２の実施形態では、筒状フィルム部材２７１の内周面と支持軸２７３の外周面との隙間を小さくすることにより、筒状フィルム部材２７１と支持軸２７３との巻付け角を大きくしたが、本発明はかかる例に限定されず、例えば、筒状フィルム部材２７１の剛性を低くすることによっても、巻付け角を大きくすることができる。   Moreover, in the said 2nd Embodiment, the winding angle of the cylindrical film member 271 and the support shaft 273 is made small by reducing the clearance gap between the internal peripheral surface of the cylindrical film member 271, and the outer peripheral surface of the support shaft 273. Although enlarged, this invention is not limited to this example, For example, a winding angle can be enlarged also by making the rigidity of the cylindrical film member 271 low.

本発明の第１の実施形態にかかる現像装置の概略構成を示す説明図である。It is explanatory drawing which shows schematic structure of the image development apparatus concerning the 1st Embodiment of this invention. 同実施形態にかかるトナー移送部材の作用を説明するための説明図である。FIG. 6 is an explanatory diagram for explaining the operation of the toner transfer member according to the embodiment. 本発明の第２の実施形態にかかる現像装置の概略構成を示す説明図である。It is explanatory drawing which shows schematic structure of the image development apparatus concerning the 2nd Embodiment of this invention. 同実施形態にかかるトナー移送部材の作用を説明するための説明図である。FIG. 6 is an explanatory diagram for explaining the operation of the toner transfer member according to the embodiment. 従来の現像装置の概略構成を示す説明図である。It is explanatory drawing which shows schematic structure of the conventional image development apparatus. 他の従来の現像装置の概略構成を示す説明図である。It is explanatory drawing which shows schematic structure of the other conventional image development apparatus.

符号の説明Explanation of symbols

１００、２００ 現像装置
１０５、２０５ 静電潜像ローラ
１１０、２１０ 現像ローラ
１２０ 層規制帯電ブレード
１３０、２３０ ＲＳローラ
１４０、２４０ 攪拌部材
１７０、２７０ トナー移送部材
１７１、２７１ 筒状フィルム部材
１７３、２７３ 支持軸 100, 200 Developing device 105, 205 Electrostatic latent image roller 110, 210 Developing roller 120 Layer regulating charging blade 130, 230 RS roller 140, 240 Stirring member 170, 270 Toner transfer member 171, 271 Cylindrical film member 173, 273 Support axis

Claims (6)

周面に現像剤を担持して移送する現像剤担持体と、
前記現像剤担持体下部側の現像剤供給領域に、前記現像剤担持体に近接または接触して配置された筒状フィルム部材と、
前記筒状フィルム部材に内挿され、前記筒状フィルム部材を回転自在に支持する支持軸と、を備え、
前記支持軸は、回動不能に固定され、
前記現像剤担持体と前記支持軸との間に前記筒状フィルム部材を前記現像剤担持体に静電吸着させる向きの電界が形成されるように、前記支持軸に電圧が印加され、
前記筒状フィルム部材は、前記現像剤担持体の回転に伴って回転することを特徴とする、現像装置。 A developer carrying member carrying and transporting the developer on the peripheral surface;
A cylindrical film member disposed in the developer supply region on the lower side of the developer carrier, in proximity to or in contact with the developer carrier;
A support shaft that is inserted into the tubular film member and rotatably supports the tubular film member,
The support shaft is fixed so as not to rotate,
A voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft so that the cylindrical film member is electrostatically attracted to the developer carrier.
2. The developing device according to claim 1, wherein the cylindrical film member rotates with the rotation of the developer carrier . 周面に現像剤を担持して移送する現像剤担持体と、
前記現像剤担持体下部側の現像剤供給領域に、前記現像剤担持体に近接または接触して配置された筒状フィルム部材と、
前記筒状フィルム部材に内挿され、前記筒状フィルム部材を回転自在に支持する支持軸と、を備え、
前記支持軸は、回転不能に固定され、
前記現像剤担持体と前記支持軸との間に前記筒状フィルム部材を前記支持軸に静電吸着させる向きの電界が形成されるように、前記支持軸に電圧が印加され、
前記筒状フィルム部材は、前記現像剤担持体の回転に対して滑りを生じることを特徴とする、現像装置。 A developer carrying member carrying and transporting the developer on the peripheral surface;
A cylindrical film member disposed in the developer supply region on the lower side of the developer carrier, in proximity to or in contact with the developer carrier;
A support shaft that is inserted into the tubular film member and rotatably supports the tubular film member,
The support shaft is fixed to be non-rotatable,
A voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft in a direction in which the cylindrical film member is electrostatically attracted to the support shaft.
The developing device according to claim 1, wherein the cylindrical film member slips with respect to the rotation of the developer carrier. 周面に現像剤を担持して移送する現像剤担持体と、
前記現像剤担持体下部側の現像剤供給領域に、前記現像剤担持体に近接または接触して配置された筒状フィルム部材と、
前記筒状フィルム部材に内挿され、前記筒状フィルム部材を回転自在に支持する支持軸と、を備え、
前記支持軸は回動可能に設けられ、
前記現像剤担持体と前記支持軸との間に前記筒状フィルム部材を前記支持軸に静電吸着させる向きの電界が形成されるように、前記支持軸に電圧が印加され、
前記支持軸と前記筒状フィルム部材は、一体に回動することを特徴とする、現像装置。 A developer carrying member carrying and transporting the developer on the peripheral surface;
A cylindrical film member disposed in the developer supply region on the lower side of the developer carrier, in proximity to or in contact with the developer carrier;
A support shaft that is inserted into the tubular film member and rotatably supports the tubular film member,
The support shaft is rotatably provided,
A voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft in a direction in which the cylindrical film member is electrostatically attracted to the support shaft.
The developing device according to claim 1, wherein the support shaft and the cylindrical film member rotate integrally. 少なくとも１つの現像装置を備える画像形成装置であって、
前記現像装置は、
周面に現像剤を担持して移送する現像剤担持体と、
前記現像剤担持体下部側の現像剤供給領域に、前記現像剤担持体に近接または接触して配置された筒状フィルム部材と、
前記筒状フィルム部材に内挿され、前記筒状フィルム部材を回転自在に支持する支持軸と、を備え、
前記支持軸は、回動不能に固定され、
前記現像剤担持体と前記支持軸との間に前記筒状フィルム部材を前記現像剤担持体に静電吸着させる向きの電界が形成されるように、前記支持軸に電圧が印加され、
前記筒状フィルム部材は、前記現像剤担持体の回転に伴って回転することを特徴とする、画像形成装置。 An image forming apparatus comprising at least one developing device,
The developing device includes:
A developer carrying member carrying and transporting the developer on the peripheral surface;
A cylindrical film member disposed in the developer supply region on the lower side of the developer carrier, in proximity to or in contact with the developer carrier;
A support shaft that is inserted into the tubular film member and rotatably supports the tubular film member,
The support shaft is fixed so as not to rotate,
A voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft so that the cylindrical film member is electrostatically attracted to the developer carrier.
The cylindrical film member rotates with the rotation of the developer carrying member . 少なくとも１つの現像装置を備える画像形成装置であって、An image forming apparatus comprising at least one developing device,
前記現像装置は、  The developing device includes:
周面に現像剤を担持して移送する現像剤担持体と、  A developer carrying member carrying and transporting the developer on the peripheral surface;
前記現像剤担持体下部側の現像剤供給領域に、前記現像剤担持体に近接または接触して配置された筒状フィルム部材と、  A cylindrical film member disposed in the developer supply region on the lower side of the developer carrier, in proximity to or in contact with the developer carrier;
前記筒状フィルム部材に内挿され、前記筒状フィルム部材を回転自在に支持する支持軸と、を備え、  A support shaft that is inserted into the tubular film member and rotatably supports the tubular film member,
前記支持軸は、回転不能に固定され、  The support shaft is fixed to be non-rotatable,
前記現像剤担持体と前記支持軸との間に前記筒状フィルム部材を前記支持軸に静電吸着させる向きの電界が形成されるように、前記支持軸に電圧が印加され、  A voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft in a direction in which the cylindrical film member is electrostatically attracted to the support shaft.
前記筒状フィルム部材は、前記現像剤担持体の回転に対して滑りを生じることを特徴とする、画像形成装置。  The image forming apparatus, wherein the cylindrical film member slips with respect to the rotation of the developer carrier. 少なくとも１つの現像装置を備える画像形成装置であって、An image forming apparatus comprising at least one developing device,
前記現像装置は、  The developing device includes:
周面に現像剤を担持して移送する現像剤担持体と、  A developer carrying member carrying and transporting the developer on the peripheral surface;
前記現像剤担持体下部側の現像剤供給領域に、前記現像剤担持体に近接または接触して配置された筒状フィルム部材と、  A cylindrical film member disposed in the developer supply region on the lower side of the developer carrier, in proximity to or in contact with the developer carrier;
前記筒状フィルム部材に内挿され、前記筒状フィルム部材を回転自在に支持する支持軸と、を備え、  A support shaft that is inserted into the tubular film member and rotatably supports the tubular film member,
前記支持軸は回動可能に設けられ、The support shaft is rotatably provided,
前記現像剤担持体と前記支持軸との間に前記筒状フィルム部材を前記支持軸に静電吸着させる向きの電界が形成されるように、前記支持軸に電圧が印加され、  A voltage is applied to the support shaft so that an electric field is formed between the developer carrier and the support shaft in a direction in which the cylindrical film member is electrostatically attracted to the support shaft.
前記支持軸と前記筒状フィルム部材は、一体に回動することを特徴とする、画像形成装置。  The image forming apparatus, wherein the support shaft and the tubular film member rotate integrally.
JP2006257912A 2006-09-22 2006-09-22 Developing device and image forming apparatus Expired - Fee Related JP4785196B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2006257912A JP4785196B2 (en) 2006-09-22 2006-09-22 Developing device and image forming apparatus
KR1020060117912A KR101329737B1 (en) 2006-09-22 2006-11-27 Developing device and image-forming apparatus adopting the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006257912A JP4785196B2 (en) 2006-09-22 2006-09-22 Developing device and image forming apparatus

Publications (2)

Publication Number Publication Date
JP2008076891A JP2008076891A (en) 2008-04-03
JP4785196B2 true JP4785196B2 (en) 2011-10-05

Family

ID=39348991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006257912A Expired - Fee Related JP4785196B2 (en) 2006-09-22 2006-09-22 Developing device and image forming apparatus

Country Status (1)

Country Link
JP (1) JP4785196B2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005257818A (en) * 2004-03-09 2005-09-22 Fuji Xerox Co Ltd Developing device, image forming apparatus using the same, and developer layer regulating member
JP2005274900A (en) * 2004-03-24 2005-10-06 Fuji Xerox Co Ltd Developing apparatus and image forming apparatus using it

Also Published As

Publication number Publication date
JP2008076891A (en) 2008-04-03

Similar Documents

Publication Publication Date Title
JP4785196B2 (en) Developing device and image forming apparatus
JP2001175066A (en) Developing device
JP5417758B2 (en) Developing device, process cartridge, and image forming apparatus
JP4854444B2 (en) Developing device and image forming apparatus
JP3502967B2 (en) Image forming device
JP4845659B2 (en) Development device
JP4665511B2 (en) Developing device and image forming apparatus using the same
JP3905209B2 (en) Development device
KR101329737B1 (en) Developing device and image-forming apparatus adopting the same
JP4529610B2 (en) Image forming apparatus, developing apparatus, and gap holding member
JP4774863B2 (en) Developing device and image forming apparatus using the same
JPH0324569A (en) Developing device
JP2001042633A (en) Developing device
JP3467660B2 (en) Developing device
JP2920917B2 (en) Developing device
JP3876789B2 (en) Development device
JPH0527579A (en) Developing device
JP2007147924A (en) Developing device
JP2005257818A (en) Developing device, image forming apparatus using the same, and developer layer regulating member
JPH11288175A (en) Image forming method
JPH09138574A (en) Electrostatic latent image developing device
JPH0527578A (en) Developing device
JP2006091530A (en) Development apparatus and image forming apparatus using it
JP2001056605A (en) Non-magnetic one-component developing device
JPH06282158A (en) Developing device

Legal Events

Date Code Title Description
RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20090515

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20090706

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20090707

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090825

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110208

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110208

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110509

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110614

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110711

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140722

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees