JPH0553383A - Process cartridge - Google Patents
Process cartridgeInfo
- Publication number
- JPH0553383A JPH0553383A JP3235665A JP23566591A JPH0553383A JP H0553383 A JPH0553383 A JP H0553383A JP 3235665 A JP3235665 A JP 3235665A JP 23566591 A JP23566591 A JP 23566591A JP H0553383 A JPH0553383 A JP H0553383A
- Authority
- JP
- Japan
- Prior art keywords
- process cartridge
- gear
- developing means
- developing
- flange
- 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
Landscapes
- Electrophotography Configuration And Component (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電子写真複写機、静電記
録装置、レーザビームプリンタの如き画像形成装置に用
いられるプロセスカートリッジに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process cartridge used in an image forming apparatus such as an electrophotographic copying machine, an electrostatic recording device and a laser beam printer.
【０００２】[0002]
【従来の技術】電子写真複写機等の画像形成装置におい
ては、装置の小型化やメンテナンスの容易化等を図るた
め、像担持体としての感光ドラムや該感光ドラムに作用
する帯電器、現像器、クリーニング器等のプロセス機器
をカートリッジフレーム内に一体に収容してユニットと
なし、これを画像図形成装置の装置本体内に着脱自在に
配設したプロセスカートリッジを使用するものも多い。2. Description of the Related Art In an image forming apparatus such as an electrophotographic copying machine, in order to downsize the apparatus and facilitate maintenance, a photosensitive drum as an image carrier, a charging device and a developing device that act on the photosensitive drum are provided. In many cases, a process cartridge such as a cleaning device is integrally housed in a cartridge frame to form a unit, and the process cartridge is detachably disposed in the main body of the image drawing forming apparatus.
【０００３】また、上記現像器には感光ドラムに対向し
て回転し、トナーをこの感光ドラムの方へ供給する現像
剤担持体としての現像スリーブが設けられているが、プ
ロセスカートリッジ内に現像器が組み込まれている場
合、該現像スリーブの回転駆動は感光ドラムを介してな
されるものも多い。図４はかかる現像器の現像スリーブ
１００の構成及び回転駆動機構の概要を示しており、現
像スリーブ１００は現像剤担持体として作用する金属製
の円筒部材１０１と、該円筒部材１０１の一端側に設け
られる金属製のフランジ部材１０２と、該フランジ部材
１０２の外端に取り付けられる回転駆動用の樹脂製のギ
ヤ部材１０３等とから構成されている。Further, although the developing device is provided with a developing sleeve as a developer carrying member which rotates in opposition to the photosensitive drum and supplies toner to the photosensitive drum, the developing device is provided in the process cartridge. In many cases, the developing sleeve is rotationally driven through the photosensitive drum. FIG. 4 shows an outline of a structure and a rotation driving mechanism of a developing sleeve 100 of such a developing device. The developing sleeve 100 includes a metallic cylindrical member 101 acting as a developer carrying member and one end side of the cylindrical member 101. It is composed of a metal flange member 102 provided and a resin-made gear member 103 for rotation driving attached to the outer end of the flange member 102.
【０００４】現像スリーブ１００は、円筒部材１０１の
一端とフランジ部材１０２の小径部１０２ａが軸受１１
０，１１１により枢支され、ギヤ部材１０３が感光ドラ
ムのドラムギヤ１２０に噛合することにより回転駆動さ
れている。尚、円筒部材１０１は例えばその径は１６mm
であり、フランジ部材１０２の小径部１０２ａはその径
が８mmとなっている。In the developing sleeve 100, one end of the cylindrical member 101 and the small diameter portion 102a of the flange member 102 are bearings 11.
The gear member 103 is rotatably driven by being meshed with the drum gear 120 of the photosensitive drum. The cylindrical member 101 has a diameter of 16 mm, for example.
The diameter of the small diameter portion 102a of the flange member 102 is 8 mm.
【０００５】ここで、前記ギヤ部材１０３はドラムギヤ
１２０に噛合して該ドラムギヤ１２０により回転駆動さ
れるため、フランジ部材１０２には該フランジ部材１０
２を偏心させようとする横方向の力が作用し、従って、
フランジ部材１０２の軸受１１１は円筒部材１０１の軸
受１１０より多くの摩擦力を受けることとなる。このた
め、フランジ部材１０２の摩擦力をできるだけ減少させ
るべく、その小径部１０２ａを軸受１１１に枢支させる
ようにし、且つその強度を補うべくフランジ部材１０２
を金属によって構成している。Here, since the gear member 103 meshes with the drum gear 120 and is rotationally driven by the drum gear 120, the flange member 10 is attached to the flange member 102.
A lateral force acting to eccentric 2 acts, thus
The bearing 111 of the flange member 102 receives more frictional force than the bearing 110 of the cylindrical member 101. Therefore, in order to reduce the frictional force of the flange member 102 as much as possible, the small diameter portion 102a is pivotally supported by the bearing 111, and the flange member 102 is supplemented with its strength.
Is made of metal.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、プロセ
スカートリッジにはその取り扱いの容易化等を図るべく
特に小型化、軽量化の要請が強いため、プロセスカート
リッジ内の現像器に金属製のフランジ部材１０２の如き
重量物を使用するのは妥当でなく、ギヤ部材１０３と一
体化した樹脂製のものにすべきとの要求が強い。一方、
樹脂製のフランジ部材１０２は強度的に弱いため、簡単
に使用できないと共に、小型化の要請で現像スリーブ１
００の円筒部材１０１もその径が１６mmのものから１２
mmのものへ変えられる傾向にあるため、フランジ部材１
０２の径もその分小さくなり、ますます樹脂製のフラン
ジ部材１０２の実現は困難になってきている。However, since there is a strong demand for downsizing and weight reduction of the process cartridge in order to facilitate its handling, the process cartridge is provided with a metal flange member 102 on the developing device. It is not appropriate to use such a heavy object, and there is a strong demand that it should be made of resin integrated with the gear member 103. on the other hand,
Since the resin flange member 102 is weak in strength, it cannot be easily used, and the developing sleeve 1 is required to be downsized.
00 cylindrical member 101 also has a diameter of 16 mm
Since it tends to be changed to mm, the flange member 1
The diameter of 02 becomes smaller accordingly, and it is becoming more difficult to realize the resin flange member 102.
【０００７】一方、図５で示される如く、現像スリーブ
の径を１２mmとし、該現像スリーブ１００のフランジ部
材１０２をギヤ部材１０３と一体化した樹脂製のものも
あるが、この場合、フランジ部材１０２の強度が弱いた
め、該フランジ部材１０２側の軸受１１１を金属製の大
径の円筒部材１０１側に設けざるを得ず、従って、ギヤ
部材１０３に近い軸受１１１側の摩擦力が増大し、現像
スリーブ１００の駆動源の容量を大きくしなければなら
ないという問題が生じる。On the other hand, as shown in FIG. 5, there is a resin sleeve in which the diameter of the developing sleeve is 12 mm and the flange member 102 of the developing sleeve 100 is integrated with the gear member 103. In this case, the flange member 102 is used. The bearing 111 on the side of the flange member 102 must be provided on the side of the metal cylindrical member 101 having a large diameter. Therefore, the frictional force on the side of the bearing 111 close to the gear member 103 increases, and There is a problem that the capacity of the drive source of the sleeve 100 must be increased.
【０００８】本発明は上記問題に鑑みてなされたもの
で、その目的とする処は、内部の現像手段を介して軽量
化と駆動源の小容量化が達成できるプロセスカートリッ
ジを提供するにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide a process cartridge which can achieve a reduction in weight and a reduction in capacity of a driving source through an internal developing means.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成すべく本
発明は、像担持体の他少なくとも、現像剤担持体の一端
部側にその回転駆動ギヤがフランジ部を介して取り付け
られている現像手段を有し、画像形成装置本体内に着脱
自在に配設されるプロセスカートリッジにおいて、前期
現像手段の現像剤担持体の回転駆動ギヤとフランジ部と
を一体の樹脂部材から構成し、且つ、該樹脂部材の回転
中心位置にその一端部がカートリッジフレームに枢支さ
れる小径の金属ピンを圧入又は接着固定し、該金属ピン
を現像剤担持体の一端部側の回転軸としたことを特徴と
する。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a developing device in which a rotary drive gear is attached to at least one end side of a developer carrying member via a flange portion in addition to an image carrying member. In a process cartridge that has a means and is removably disposed in the main body of the image forming apparatus, the rotary drive gear and the flange portion of the developer carrier of the developing means are composed of an integral resin member, and A small diameter metal pin, one end of which is pivotally supported by the cartridge frame, is press-fitted or adhesively fixed to the rotation center position of the resin member, and the metal pin serves as a rotation shaft on one end side of the developer carrying member. To do.
【００１０】[0010]
【作用】現像手段の現像剤担持体のフランジ部に支持さ
れる回転駆動ギヤ側に小径で強度の大きい金属ピンを圧
入等して固定し、該金属ピンを介してこの現像剤担持体
の一端部をカートリッジフレームに枢支させるようにし
ているため、回転駆動ギヤを介して金属ピンの支持部に
大きな摩擦摺擦力が作用しても、小径である分全体の摩
擦力は小さくなり、現像剤担持体の回転駆動力を小さな
ものですますことができることとなる。A small-diameter and high-strength metal pin is press-fitted and fixed to the rotary drive gear side supported by the flange portion of the developer carrier of the developing means, and one end of the developer carrier is inserted through the metal pin. Since the parts are pivotally supported by the cartridge frame, even if a large frictional sliding force acts on the support part of the metal pin via the rotary drive gear, the small friction reduces the overall frictional force, The rotation driving force of the agent carrier can be further reduced.
【００１１】従って、回転駆動ギヤを支持するフランジ
部側に支持部を設ける必要がないため、該フランジ部に
大きな力が作用することもなく、このフランジ部を回転
駆動ギヤと一体の樹脂部材で構成することができ、現像
手段の軽量化、及び該現像手段を有するプロセスカート
リッジの軽量化を達成できると共に、現像手段の現像剤
担持体の駆動力が小さくなった分だけ、プロセスカート
リッジの駆動源の小容量化を図ることができる。Therefore, since it is not necessary to provide a support portion on the side of the flange portion that supports the rotary drive gear, a large force does not act on the flange portion, and the flange portion is made of a resin member integrated with the rotary drive gear. The developing means can be configured to be lighter in weight, and the process cartridge having the developing means can be lighter in weight, and the driving force of the developer carrier of the developing means can be reduced. The capacity can be reduced.
【００１２】[0012]
【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。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１３】先ず、本発明の第１実施例を図１及び図２
により説明する。First, a first embodiment of the present invention will be described with reference to FIGS.
Will be explained.
【００１４】図２は複写機の断面を示すものであり、図
中１は矢印方向に回転される像担持体である感光ドラム
であり、該感光ドラム１の周りには帯電器２、現像器
３、クリーニング器４といったプロセス機器が配設され
ている。そして、これ等の機器はカートリッジフレーム
５ａ内に一体的に収納され、プロセスカートリッジ５と
して複写機の装置本体５０内に着脱自在に配設されて、
メンテナンス等の容易化が図られている。FIG. 2 is a sectional view of the copying machine. In FIG. 2, reference numeral 1 is a photosensitive drum which is an image bearing member rotated in the direction of the arrow, and a charging device 2 and a developing device are provided around the photosensitive drum 1. Process devices such as 3 and a cleaning device 4 are provided. These devices are integrally housed in the cartridge frame 5a, and are detachably arranged as the process cartridge 5 in the main body 50 of the copying machine.
Efforts such as maintenance are facilitated.
【００１５】プロセスカートリッジ５の上方には原稿載
置用の原稿台６が配設され、該原稿台６のやや下方には
原稿台６上の原稿に光を当てる照明ランプ７、及び該照
明ランプ７からの反射光を読み取り、これを画像光とし
て感光ドラム１の方へ導く短焦点光学素子アレイ８が配
設されている。また、プロセスカートリッジ５の給紙側
には給紙カセット９、給紙ローラ１０、転写紙ガイド１
１、転写帯電器１２が配設され、プロセスカートリッジ
５の排紙側には転写紙の配送路１３を介して、定着器１
４、排紙ローラ１５、排紙トレイ１６が配設されてい
る。A document table 6 for placing a document is arranged above the process cartridge 5, and an illumination lamp 7 for illuminating a document on the document table 6 and a lamp 7 for illuminating the document on the document table 6 are slightly below the document table 6. A short focus optical element array 8 is provided which reads the reflected light from 7 and guides it to the photosensitive drum 1 as image light. Further, on the paper feed side of the process cartridge 5, a paper feed cassette 9, a paper feed roller 10, a transfer paper guide 1
1. A transfer charger 12 is provided, and a fixing device 1 is provided on the paper discharge side of the process cartridge 5 via a transfer paper delivery path 13.
4, a paper discharge roller 15, and a paper discharge tray 16 are provided.
【００１６】即ち、帯電器２により一様帯電された感光
ドラム１上に、照明ランプ７及び短焦点光学素子アレイ
８を介して画像光が露光されると、この感光ドラム１上
には静電潜像が形成される。該静電潜像は感光ドラム１
の回転とともに現像器３の方へ向けられ、該現像器３に
よてトナーが供給されてトナー像として顕像化される。
そして、このトナー像は転写帯電器１２の方へ向けられ
て、該転写帯電器１２によって転写紙以上に転写され、
また、転写の終了した感光ドラム１はクリーニング器４
によりその残留トナーがクリーニングされて、つぎの画
像形成のために備えられる。That is, when image light is exposed on the photosensitive drum 1 uniformly charged by the charger 2 through the illumination lamp 7 and the short focus optical element array 8, the photosensitive drum 1 is electrostatically charged. A latent image is formed. The electrostatic latent image is the photosensitive drum 1.
Is rotated toward the developing device 3, and toner is supplied by the developing device 3 and visualized as a toner image.
Then, the toner image is directed toward the transfer charger 12, and is transferred onto the transfer paper or more by the transfer charger 12.
Further, the photosensitive drum 1 after the transfer is cleaned by the cleaning device 4
Thus, the residual toner is cleaned and prepared for the next image formation.
【００１７】一方、給紙カセット９内の転写紙は給紙ロ
ーラ１０により一枚ずつ取り出された後、転写紙ガイド
１１を介して感光ドラム１と転写帯電器１２間に送ら
れ、感光ドラム１上のトナー像が転写されるが、その
後、搬送路１３を介して定着器１４に送られる。そし
て、この定着器１４により転写紙はそのトナー像が永久
像として定着された後、排紙ローラ１５を介して排紙ト
レイ１６上に積載される。On the other hand, the transfer papers in the paper feed cassette 9 are taken out one by one by the paper feed roller 10 and then sent between the photosensitive drum 1 and the transfer charger 12 via the transfer paper guide 11 and the photosensitive drum 1 is transferred. The toner image on the upper side is transferred, but thereafter, it is sent to the fixing device 14 via the conveying path 13. Then, after the toner image of the transfer paper is fixed as a permanent image by the fixing device 14, the transfer paper is stacked on the paper discharge tray 16 via the paper discharge roller 15.
【００１８】さて、前記プロセスカートリッジ５を構成
する現像器３には、感光ドラム１に対向する位置に現像
作業に当り該感光ドラム１にトナーを供給する像担持体
としての現像スリーブ３０が配設されている。この現像
スリーブ３０は磁力等の作用によりその外周面にトナー
を吸着保持して回転し、該トナーを感光ドラム１側に移
動させ、バイアス電圧等の作用により、これを感光ドラ
ム１の潜像の方へ移動させるものである。以下この現像
スリーブ３０の構成及び回転駆動機構等について図１に
より説明する。The developing device 3 constituting the process cartridge 5 is provided with a developing sleeve 30 as an image carrier for supplying toner to the photosensitive drum 1 at the position opposed to the photosensitive drum 1 during the developing operation. Has been done. The developing sleeve 30 rotates by attracting and holding the toner on the outer peripheral surface thereof by the action of magnetic force or the like, moving the toner to the photosensitive drum 1 side, and by the action of the bias voltage or the like, the latent image on the photosensitive drum 1 is formed. It is to move toward. The structure of the developing sleeve 30 and the rotation driving mechanism will be described below with reference to FIG.
【００１９】図１は現像スリーブ３０が現像器３内に配
設されている状態を示しているが、この現像スリーブ３
０は金属製の円筒部材３１と、該円筒部材３１の一端に
取り付けられるフランジ部材３２と、該フランジ部材３
２の一端に設けられる回転駆動用のギヤ部材３３と、該
ギヤ部材３３及びフランジ部材３２の回転中心に設けら
れた孔部に圧入又は挿入後接着剤等で固定されたピン部
材３４等とから構成されている。そして、円筒部材３１
の一端部が軸受４０により枢支され、ギヤ部材３３から
外方に突出するピン部材３４の一端がカートリッジフレ
ーム５ａに設けた穴状の軸受４１に枢支されている。
尚、４２は現像スリーブ３０と感光ドラム１間の隙間を
一定に保持させる厚さ３００μｍのＳＤコロであり、４
３は円筒部材３１の外周面に吸着保持されたトナーがそ
の外端部へ移動するを防止する摺擦用のフェルトであ
る。Although FIG. 1 shows a state in which the developing sleeve 30 is disposed inside the developing device 3, this developing sleeve 3
Reference numeral 0 denotes a metallic cylindrical member 31, a flange member 32 attached to one end of the cylindrical member 31, and the flange member 3
2 includes a gear member 33 for rotation driving provided at one end of the pin 2, and a pin member 34 and the like fixed with an adhesive or the like after being press-fitted or inserted into a hole provided at the rotation center of the gear member 33 and the flange member 32. It is configured. Then, the cylindrical member 31
One end of the pin member 34 is pivotally supported by the bearing 40, and one end of the pin member 34 protruding outward from the gear member 33 is pivotally supported by the hole-shaped bearing 41 provided in the cartridge frame 5a.
Reference numeral 42 denotes an SD roller having a thickness of 300 μm that keeps the gap between the developing sleeve 30 and the photosensitive drum 1 constant.
3 is a felt for rubbing which prevents the toner adsorbed and held on the outer peripheral surface of the cylindrical member 31 from moving to the outer end portion thereof.
【００２０】現像スリーブ３０の円筒部材３１は外径が
１２mmのアルミ又はステンレス製の中空部材から構成さ
れるが、その外表面は例えば＃４００のブラスト粒子に
よる加工が施されて、その表面粗さはＪＩＳ１０点平均
粗さでＲｚ−２．０μｍ程度となっている。尚、円筒部
材３１の外表面の凹凸は均一であることが望ましく、ト
ナー粒子の平均粒径よりもＲｚが小さいことが望まし
い。The cylindrical member 31 of the developing sleeve 30 is made of an aluminum or stainless hollow member having an outer diameter of 12 mm. The outer surface of the cylindrical member 31 is processed with, for example, # 400 blast particles to obtain a surface roughness. The JIS 10-point average roughness is about Rz-2.0 μm. It should be noted that the irregularities on the outer surface of the cylindrical member 31 are preferably uniform, and Rz is preferably smaller than the average particle size of the toner particles.
【００２１】フランジ部材３２は円筒部材３１内に挿入
固定される大径部とギヤ部材３３が設けられる小径部と
からなるが、このフランジ部材３２とその端部側のギヤ
部材３３とは滑りのよいポリアセチレン樹脂等の樹脂部
材から一体的に形成されている。そして、ギヤ部材３３
は感光ドラム１の軸端に設けられたドラムギヤ１ａに噛
合し、該ドラムギヤ１ａによって回転駆動される。ま
た、ピン部材３４はその径が３mmと小径であり、強度の
大きいステンレス材等から構成されている。The flange member 32 is composed of a large-diameter portion which is inserted and fixed in the cylindrical member 31 and a small-diameter portion where the gear member 33 is provided. It is integrally formed from a resin member such as good polyacetylene resin. Then, the gear member 33
Engages with a drum gear 1a provided at the shaft end of the photosensitive drum 1 and is rotationally driven by the drum gear 1a. The pin member 34 has a small diameter of 3 mm and is made of stainless steel or the like having high strength.
【００２２】而して、プロセスカートリッジ５が装置本
体５０内に装着され、画像形成作業が開始されると、装
置本体５０側の駆動ギヤを介してドラムギヤ１ａが回転
駆動され、感光ドラム１が回転される。そして、ドラム
ギヤ１ａを介して現像器３のギヤ部材３３が回転され、
現像スリーブ３０が所定の速度で回転されて、現像作業
が行なわれることとなる。そして、現像スリーブ３０は
円筒部材３１側の軸受４０とピン部材３４側の軸受４１
に枢支されることとなる。When the process cartridge 5 is mounted in the apparatus main body 50 and the image forming operation is started, the drum gear 1a is rotationally driven via the drive gear on the apparatus main body 50 side, and the photosensitive drum 1 is rotated. To be done. Then, the gear member 33 of the developing device 3 is rotated via the drum gear 1a,
The developing sleeve 30 is rotated at a predetermined speed, and the developing work is performed. The developing sleeve 30 includes a bearing 40 on the cylindrical member 31 side and a bearing 41 on the pin member 34 side.
Will be pivoted to.
【００２３】この場合、ギヤ部材３３にはドラムギヤ１
ａを介してその回転軸をずらす向き（ギヤ部材３３を円
筒部材３１に対して偏心させる向き）に力が作用し、ピ
ン部材３４側の軸受４１には大きな摩擦摺擦力が作用す
ることとなるが、ピン部材３４が小径であるため、前記
摩擦摺擦力の合計たる摩擦力は小さく抑えられる。即
ち、直径３mmのピン部材３４を軸受で支持すれば、直径
１２mmの円筒部材３１を軸受で支持する場合に比べ、ギ
ヤ部材３３側の負荷トルクは1/4 程度に低下でき、現像
スリーブ３０の全体の負荷トルクも従来の円筒部材３１
に軸受を設けた場合では２．６Kg・cm あるのに、ピン部
材３４に軸受を設けた場合では１．６Kg・cm までに低減
できる。従って、プロセスカートリッジ５内の機器を駆
動する駆動源の容量をその分小さくできることとなる。
尚、小径のピン部材３４には現像スリーブ３０にかかる
力の半分以上が作用するが、ピン部材３４は強度の大き
いステンレス材でできているため、このピン部材３４に
折れや曲がりは生じない。In this case, the gear member 33 includes the drum gear 1
A force acts on the bearing 41 on the side of the pin member 34 to exert a large frictional frictional force on the bearing 41 on the side of the pin member 34, in which the force acts in the direction of displacing the rotation axis of the gear member 33 through a. However, since the pin member 34 has a small diameter, the total frictional force of the frictional sliding force can be suppressed to be small. That is, if the pin member 34 having a diameter of 3 mm is supported by the bearing, the load torque on the gear member 33 side can be reduced to about 1/4 as compared with the case where the cylindrical member 31 having a diameter of 12 mm is supported by the bearing. The entire load torque is also the same as the conventional cylindrical member 31.
When the bearing is provided on the pin member 34, the pressure is 2.6 kg · cm, but when the bearing is provided on the pin member 34, it can be reduced to 1.6 kg · cm. Therefore, the capacity of the drive source that drives the devices in the process cartridge 5 can be reduced accordingly.
Incidentally, more than half of the force applied to the developing sleeve 30 acts on the small-diameter pin member 34, but since the pin member 34 is made of a stainless steel material having high strength, the pin member 34 is not bent or bent.
【００２４】また、上記の如くピン部材３４で現像スリ
ーブ３０の一端部を支持できるため、フランジ部材３２
には大きな力が作用せず、その材質も樹脂により、ギヤ
部材３３と一体で構成できることとなる。このため、フ
ランジ部材及びギヤ部材３３の製作の容易化が図られる
と共に、現像器３の軽量化が図られ、該現像器３を有す
るプロセスカートリッジ５の軽量化が図られて、プロセ
スカートリッジ５の取り扱いの容易化が図られることと
なる。Further, since the one end portion of the developing sleeve 30 can be supported by the pin member 34 as described above, the flange member 32 is provided.
A large force does not act on the gear member 33, and the material of the gear member 33 can be integrally formed with the gear member 33. Therefore, the manufacturing of the flange member and the gear member 33 is facilitated, the weight of the developing device 3 is reduced, the weight of the process cartridge 5 having the developing device 3 is reduced, and the process cartridge 5 is reduced. The handling will be facilitated.
【００２５】次に、本発明の第２実施例を図３により説
明する。尚、第１実施例に係るものと同一機能を有する
ものについては同一符号を付しその説明を省略する。Next, a second embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to those having the same functions as those according to the first embodiment, and the description thereof will be omitted.
【００２６】本実施例ではフランジ部材３２と一体に樹
脂で構成された現像スリーブ３０のギヤ部材３３の歯形
を平歯から、はす歯に変更し、これと同時に感光ドラム
１のドラムギヤ１ａ及び装置本体５０側の駆動ギヤ１７
の歯形も平歯から、はす歯に変更した。他の条件は第１
実施例のものと全く同一である。In this embodiment, the tooth profile of the gear member 33 of the developing sleeve 30 which is integrally formed of resin with the flange member 32 is changed from a flat tooth to a helical tooth, and at the same time, the drum gear 1a of the photosensitive drum 1 and the apparatus. Drive gear 17 on the main body 50 side
The tooth profile of the tooth has been changed from a flat tooth to a helical tooth. Other conditions are first
It is exactly the same as that of the embodiment.
【００２７】而して、現像スリーブ３０のギヤ部材３
３、感光ドラム１のドラムギヤ１ａ及び装置本体５０側
の駆動ギヤ１７は全てはす歯ギヤであるため、これ等が
噛合して回転すれば、噛み合いが滑らかになされるばか
りでなく、感光ドラム１及び現像器３の現像スリーブ３
０はその軸方向に力を受け、このスラスト力によりプロ
セスカートリッジ５を装置本体５０の適正位置に固定で
きることとなる。Thus, the gear member 3 of the developing sleeve 30.
3. Since the drum gear 1a of the photosensitive drum 1 and the drive gear 17 on the side of the apparatus main body 50 are all helical gears, if they are meshed and rotated, not only the meshing is smoothed, but also the photosensitive drum 1 And the developing sleeve 3 of the developing device 3.
0 receives a force in the axial direction, and this thrust force allows the process cartridge 5 to be fixed at an appropriate position of the apparatus main body 50.
【００２８】この場合、はす歯ギヤである樹脂製のギヤ
部材３３には現像スリーブ３０をその軸方向に移動させ
ようとするスラスト力が作用し、平歯ギヤである場合に
比べて強度が必要とされるが、このギヤ部材３３にはそ
の中心部にステンレス製のピン部材３４が圧入等されて
いるため強度があり、このギヤ部材３３が破損等するこ
とはない。尚、本実施例においても第１実施例と同様な
効果を得ることができるのは勿論である。In this case, a thrust force for moving the developing sleeve 30 in the axial direction acts on the resin gear member 33, which is a helical gear, so that the strength is higher than that of the spur gear. Although required, this gear member 33 has strength because a pin member 34 made of stainless steel is press-fitted into the center portion of the gear member 33, so that the gear member 33 has strength and is not damaged. It is needless to say that the same effects as those of the first embodiment can be obtained in this embodiment as well.
【００２９】[0029]
【発明の効果】以上の説明で明らかな如く本発明によれ
ば、現像手段の現像剤担持体の回転駆動ギヤ側を小径の
金属ピンを介してカートリッジフレームに枢支させるよ
うにしているため、現像剤担持体の駆動力を小さなもの
ですますことができる。また、回転駆動ギヤを支持する
フランジ部に大きな力が作用しないため、これを回転駆
動ギヤと一体の樹脂部材から構成し、現像剤担持体の軽
量化を図ることができる。As is apparent from the above description, according to the present invention, the rotary drive gear side of the developer carrying member of the developing means is pivotally supported on the cartridge frame via the small diameter metal pin. The driving force of the developer carrier can be reduced. Further, since a large force does not act on the flange portion that supports the rotary drive gear, this can be made of a resin member integrated with the rotary drive gear to reduce the weight of the developer carrier.
【００３０】従って、以上の現像手段を有すプロセスカ
ートリッジの軽量化をも図ることができると共に、プロ
セスカートリッジ駆動用の駆動源の小容量化をも図るこ
とができる。Therefore, it is possible to reduce the weight of the process cartridge having the above-mentioned developing means and to reduce the capacity of the drive source for driving the process cartridge.
【図１】第１実施例に係るプロセスカートリッジの内部
の現像器の現像スリーブの構成等を示す図である。FIG. 1 is a diagram showing a configuration of a developing sleeve of a developing device inside a process cartridge according to a first embodiment.
【図２】同プロセスカートリッジを有する複写機の側断
面図である。FIG. 2 is a side sectional view of a copying machine having the same process cartridge.
【図３】第２実施例に係るプロセスカートリッジの内部
の現像器の現像スリーブの構成等を示す図である。FIG. 3 is a diagram showing a configuration of a developing sleeve of a developing device inside a process cartridge according to a second embodiment.
【図４】第１の従来技術の説明図である。FIG. 4 is an explanatory diagram of a first conventional technique.
【図５】第２の従来技術の説明図である。FIG. 5 is an explanatory diagram of a second conventional technique.
１ 感光ドラム（像担持体） ３ 現像器（現像手段） ５ａ カートリッジフレーム ３０ 現像スリーブ（現像剤担持体） ３２ フランジ部材（フランジ部） ３３ ギヤ部材（回転駆動ギヤ） ３４ ピン部材（金属ピン） 1 Photosensitive Drum (Image Bearing Body) 3 Developing Device (Developing Means) 5a Cartridge Frame 30 Developing Sleeve (Developer Bearing Body) 32 Flange Member (Flange Part) 33 Gear Member (Rotation Drive Gear) 34 Pin Member (Metal Pin)
Claims (1)
の一端部側にその回転駆動ギヤがフランジ部を介して取
り付けられている現像手段を有し、画像形成装置本体内
に着脱自在に配設されるプロセスカートリッジにおい
て、前記現像手段の現像剤担持体の回転駆動ギヤとフラ
ンジ部とを一体の樹脂部材から構成し、且つ、該樹脂部
材の回転中心位置にその一端部がカートリッジフレーム
に枢支される小径の金属ピンを圧入又は接着固定し、該
金属ピンを現像剤担持体の一端部側の回転軸としたこと
を特徴とするプロセスカートリッジ。1. In addition to the image carrier, at least one developing device having a rotary drive gear attached to one end of the developer carrier via a flange is detachably mounted in the main body of the image forming apparatus. In the disposed process cartridge, the rotary drive gear of the developer carrier of the developing means and the flange portion are formed of an integral resin member, and one end portion of the resin frame is at the rotation center position of the resin member. A process cartridge characterized in that a small-diameter metal pin pivotally supported is press-fitted or adhered and fixed, and the metal pin serves as a rotary shaft on one end side of a developer carrying member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3235665A JPH0553383A (en) | 1991-08-23 | 1991-08-23 | Process cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3235665A JPH0553383A (en) | 1991-08-23 | 1991-08-23 | Process cartridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0553383A true JPH0553383A (en) | 1993-03-05 |
Family
ID=16989387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3235665A Pending JPH0553383A (en) | 1991-08-23 | 1991-08-23 | Process cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0553383A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6040918A (en) * | 1993-11-09 | 2000-03-21 | Sieko Epson Corporation | Copying machine |
| US6317156B1 (en) | 1996-08-07 | 2001-11-13 | Olympus Optical Co., Ltd. | Printer incorporated type electronic camera and member to be recorded |
| JP2012226166A (en) * | 2011-04-20 | 2012-11-15 | Katsuragawa Electric Co Ltd | Roller positioning mechanism |
-
1991
- 1991-08-23 JP JP3235665A patent/JPH0553383A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6040918A (en) * | 1993-11-09 | 2000-03-21 | Sieko Epson Corporation | Copying machine |
| US6317156B1 (en) | 1996-08-07 | 2001-11-13 | Olympus Optical Co., Ltd. | Printer incorporated type electronic camera and member to be recorded |
| JP2012226166A (en) * | 2011-04-20 | 2012-11-15 | Katsuragawa Electric Co Ltd | Roller positioning mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5592275A (en) | Image fixing device with oil application roller for image forming apparatus | |
| JPS634252A (en) | Process cartridge and image forming device using same | |
| JP3293438B2 (en) | Drive transmission device | |
| JP2749953B2 (en) | Image forming device | |
| JP2002123143A (en) | Cleaning device, and process cartridge and image forming device equipped with the cleaning device | |
| JP2013037122A (en) | Process cartridge | |
| JPH0553383A (en) | Process cartridge | |
| JP2002196585A (en) | Process cartridge and electrophotographic image forming device | |
| JPH07271130A (en) | Image forming device | |
| JP3247280B2 (en) | Photoconductor drum drive mechanism | |
| JPH09305040A (en) | Turning part supporting device for image forming device | |
| JP3589112B2 (en) | Image forming device | |
| JP2003131543A (en) | Process cartridge and image forming device | |
| JP3535607B2 (en) | Image forming device | |
| JPH0535095A (en) | Developing device | |
| JPH0545949A (en) | Image forming device | |
| JPH02156280A (en) | Image forming device | |
| JP2009288458A (en) | Toner cartridge, developing unit and image forming apparatus | |
| JPH0950181A (en) | Electrostatic latent image developing device | |
| JPH1097158A (en) | Image forming device | |
| JPH0792801A (en) | Developing device | |
| JPH06175426A (en) | Image holding body and process cartridge and image formation device | |
| JP3280515B2 (en) | Image forming device | |
| JPH06348122A (en) | Image forming device and process cartridge | |
| JP5355039B2 (en) | Developer supply device and development device |