JPH07319301A - Transfer device in image forming device - Google Patents
Transfer device in image forming deviceInfo
- Publication number
- JPH07319301A JPH07319301A JP6111344A JP11134494A JPH07319301A JP H07319301 A JPH07319301 A JP H07319301A JP 6111344 A JP6111344 A JP 6111344A JP 11134494 A JP11134494 A JP 11134494A JP H07319301 A JPH07319301 A JP H07319301A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- image forming
- high voltage
- unit base
- forming apparatus
- 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.)
- Granted
Links
Landscapes
- Electrophotography Configuration And Component (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、レーザプリンタ、複写
機、ファクシミリ装置等の静電写真式の画像形成装置に
おける転写装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device in an electrostatographic image forming apparatus such as a laser printer, a copying machine or a facsimile machine.
【0002】[0002]
【従来の技術】従来から、例えば特開平3−16657
3号公報に開示されているように、一様に帯電させた像
担持体の表面に光像信号を与えて静電潜像を形成し、こ
の潜像に帯電トナーを付与してトナー像を形成した後、
像担持体表面に転写ローラを当接した転写部位に用紙を
通過させつつ転写ローラに高圧の転写電圧を印加して、
用紙にトナー像を転移させ、その後、用紙を加熱押圧さ
せてトナー像を用紙に定着して画像形成するようにした
画像形成装置が知られている。2. Description of the Related Art Conventionally, for example, JP-A-3-16657.
As disclosed in Japanese Patent Laid-Open No. 3 (1993), an optical image signal is applied to the surface of an image carrier that is uniformly charged to form an electrostatic latent image, and charged toner is applied to the latent image to form a toner image. After forming
Applying a high transfer voltage to the transfer roller while passing the paper through the transfer part where the transfer roller is in contact with the surface of the image carrier,
An image forming apparatus is known in which a toner image is transferred onto a sheet and then the sheet is heated and pressed to fix the toner image on the sheet to form an image.
【0003】この場合、従来では、転写ローラを支持す
る部材と、転写部位から出てくる用紙を定着装置方向へ
誘導するガイド部材と転写電圧を印加するための高電圧
回路を形成した基板とは、別々に画像形成装置の本体フ
レームに取付けていた。In this case, conventionally, a member for supporting the transfer roller, a guide member for guiding the paper coming out of the transfer portion toward the fixing device, and a substrate having a high voltage circuit for applying a transfer voltage are used. , Were separately attached to the main body frame of the image forming apparatus.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うに構成すると、前記各部品の取付け作業や分解作業に
手間が掛かるし、その上、高電圧基板から転写ローラに
印加する導電線を別途接続しなければならず、その接
続、取り外しにも手間が掛かる。さらに、画像形成装置
の使用中に、紙ジャムが生じた場合には、作業者が転写
部位に手を差し込んで用紙を抜き取る作業を実行するか
ら、前記高電圧基板に手等が触れないようにする配慮も
必要であり、そのため、従来では、前記高電圧基板の表
面を絶縁製のカバー体で覆う等の処置を施していたか
ら、必要部品点数も多くなると共に製造コストも高くな
るという問題があった。However, with this configuration, it takes a lot of time to attach and disassemble the above-mentioned components, and additionally, a conductive wire to be applied to the transfer roller from the high-voltage board is separately connected. It has to be connected and disconnected, which is troublesome. Furthermore, if a paper jam occurs during use of the image forming apparatus, the operator inserts his / her hand into the transfer portion to pull out the paper, so that the hand or the like should not touch the high-voltage board. Therefore, conventionally, since the surface of the high-voltage board is covered with an insulating cover body, the number of required parts is increased and the manufacturing cost is increased. .
【0005】本発明は、前記の技術的問題を解決すべく
なされたものであり、取付け、分解作業を容易にでき、
且つ製造コストを低減し、安全な画像形成装置における
転写装置を提供することを目的とするものである。The present invention has been made to solve the above technical problems, and facilitates the mounting and disassembling work,
Moreover, it is an object of the present invention to provide a transfer device in a safe image forming apparatus, which reduces manufacturing cost.
【0006】[0006]
【課題を解決するための手段】前記目的を達成するた
め、請求項1記載の発明の画像形成装置における転写装
置は、トナー像を担持し回転する像担持体の表面と対峙
する転写部材に転写電圧を印加し、転写部材を通過する
用紙等の被記録媒体にトナー像を転写させるように構成
した画像形成装置において、表面に前記転写部材の支持
部と被記録媒体の通過ガイド部材とを形成した転写ユニ
ット台の裏面側には、前記転写部材に転写電圧を印加す
るための高電圧基板における縁部を取付け支持するため
の支持手段を備えたものである。In order to achieve the above object, a transfer device in an image forming apparatus according to the present invention transfers a toner image onto a transfer member which faces a surface of an image carrier which rotates and carries a toner image. In an image forming apparatus configured to transfer a toner image to a recording medium such as a sheet that passes a transfer member by applying a voltage, a support portion of the transfer member and a passage guide member for the recording medium are formed on the surface. On the back surface side of the transfer unit table, there is provided a supporting means for attaching and supporting an edge portion of the high voltage substrate for applying a transfer voltage to the transfer member.
【0007】また、請求項2記載の発明は、請求項1記
載の画像形成装置における転写装置において、前記転写
ユニット台を裏面開放状の箱状に形成し、該箱部内に前
記高電圧基板の広幅面がほぼ覆われるように構成する一
方、前記箱部内側面に前記支持手段を設けたものであ
る。さらに、請求項3記載の発明は、請求項1または請
求項2記載の画像形成装置における転写装置において、
前記転写ユニット台の裏面側には、前記高電圧基板広幅
面に形成した電極部に対して弾性押圧して接触する端子
手段を臨ませ、該端子手段と前記転写部材に接続した配
線とを接続したものである。According to a second aspect of the present invention, in the transfer device of the image forming apparatus according to the first aspect, the transfer unit base is formed in a box shape with an open back surface, and the high voltage substrate is formed in the box portion. While the wide surface is configured to be substantially covered, the supporting means is provided on the inner surface of the box portion. Further, the invention according to claim 3 is the transfer device in the image forming apparatus according to claim 1 or 2,
On the back surface side of the transfer unit base, terminal means for elastically pressing and contacting the electrode portion formed on the wide surface of the high voltage substrate is exposed, and the terminal means and the wiring connected to the transfer member are connected. It was done.
【0008】[0008]
【実施例】次に、本発明を具体化した実施例について説
明する。図1は画像形成装置としてのレーザビーム式プ
リンタ1の概略側断面図、図2は転写装置の側断面図で
ある。本実施例のプリンタ1における本体ケース2内の
下部に給紙部としての給紙カセット3を着脱自在に装着
し、複数の給紙ローラ4等により、給紙カセット3内に
積層された被記録媒体としての用紙Pが一枚ずつに分離
されて用紙ガイド板5や給送ローラ対6を介して画像形
成ユニット7と、転写部材としての転写ローラ9を備え
た転写ユニット台8との間に送られる。EXAMPLES Next, examples embodying the present invention will be described. FIG. 1 is a schematic sectional side view of a laser beam printer 1 as an image forming apparatus, and FIG. 2 is a sectional side view of a transfer device. In the printer 1 of this embodiment, a paper feed cassette 3 as a paper feed unit is detachably attached to a lower portion of a main body case 2, and recording sheets stacked in the paper feed cassette 3 by a plurality of paper feed rollers 4 and the like. The paper P as a medium is separated one by one, and between the image forming unit 7 and the transfer unit base 8 having a transfer roller 9 as a transfer member via the paper guide plate 5 and the feeding roller pair 6. Sent.
【0009】画像形成ユニット7は、感光体ドラム10
と、トナータンクや現像ローラ12等からなる現像装置
ユニット11と、帯電ローラ等からなる帯電装置13、
クリーニング(図示しない)装置等を1つのキットとし
てケース内に収納して単一ユニットを構成している。画
像形成ユニット7の上方には、レーザ発光部23、レン
ズ24、反射鏡25等からなるスキャナユニット22が
配置されており、転写ユニット台8の下方には、前記帯
電装置13や転写ローラ9の高電圧を印加するための高
電圧基板26が配置され、定着ユニット15の下方に制
御基板27が配置されている。The image forming unit 7 includes a photosensitive drum 10.
A developing device unit 11 including a toner tank and a developing roller 12, and a charging device 13 including a charging roller,
A cleaning (not shown) device and the like are housed in a case as one kit to form a single unit. A scanner unit 22 including a laser emitting section 23, a lens 24, a reflecting mirror 25, and the like is arranged above the image forming unit 7, and below the transfer unit table 8 the charging device 13 and the transfer roller 9 are arranged. A high voltage substrate 26 for applying a high voltage is arranged, and a control substrate 27 is arranged below the fixing unit 15.
【0010】帯電装置13にて予め帯電させた感光体ド
ラム10の表面に、図示しないホストコンピュータ等の
外部機器から伝送された画像データに応じて、スキャナ
ユニット22から発射された光を照射して、感光体ドラ
ム10の表面に静電潜像を形成し、次いで、現像ローラ
12を回転して帯電させた粉体状のトナーの供給により
前記潜像を可視像化するという現像を実行した後、この
感光体ドラム10と転写ローラ9との間に供給された用
紙Pに前記トナー像を転写する。次に、後に詳述する転
写ユニット台8表面側(上側)の用紙の通過ガイド部材
32上を滑って搬送される用紙Pは、定着ユニット15
における加熱ローラ16と押圧ローラ17との間を通過
して、前記転写された像に熱及び圧力を付加して用紙に
トナー像を定着させる。その後、排紙ガイド板18、中
間ローラ対19、排紙ローラ対20を介して本体ケース
2上面の用紙トレイ21に排紙されるものである。The surface of the photosensitive drum 10 precharged by the charging device 13 is irradiated with light emitted from the scanner unit 22 in accordance with image data transmitted from an external device such as a host computer (not shown). The electrostatic latent image is formed on the surface of the photoconductor drum 10, and then the developing roller 12 is rotated to supply the charged powdery toner to visualize the latent image. After that, the toner image is transferred onto the paper P supplied between the photosensitive drum 10 and the transfer roller 9. Next, the sheet P that is conveyed by sliding on the sheet passage guide member 32 on the front surface side (upper side) of the transfer unit table 8 which will be described in detail later is fixed in the fixing unit 15.
Then, heat and pressure are applied to the transferred image to fix the toner image on the sheet by passing between the heating roller 16 and the pressing roller 17. After that, the paper is discharged to the paper tray 21 on the upper surface of the main body case 2 via the paper discharge guide plate 18, the intermediate roller pair 19, and the paper discharge roller pair 20.
【0011】次に、本発明の転写装置の一実施例につい
て、図1及び図2を参照しながら以下に説明する。転写
ユニット台8は、ABS樹脂等の電気絶縁性を有する合
成樹脂にて射出成形にて形成したものであり、転写ユニ
ット台8の台板8a上面の一側には、図2に示すよう
に、導電性スポンジ等にて構成された転写ローラ9の導
電性(金属製)の軸の左右両端の軸受(図示せず)を上
下動自在に支持するための二股溝状の支持部31を上向
き突設する。なお、この軸受は金属性(導電性)のコイ
ル等の付勢手段(図示せず)にて転写ローラ9が感光体
ドラム10の下側円周面に押圧されるように構成されて
おり、前記支持部31に隣接する台板8a上の段部に
は、前記転写部位を通過した用紙Pを前記定着ユニット
15方向に導くための複数のフイン状の通過ガイド部材
32を上向きに一体的に突設している。前記軸受のうち
少なくとも一方の軸受を導電性材料(金属製、または合
成樹脂にカーボンブラック、黒鉛、金属粉末を分散させ
た複合部材)にて構成されている。An embodiment of the transfer device of the present invention will be described below with reference to FIGS. 1 and 2. The transfer unit base 8 is formed by injection molding with a synthetic resin having an electrical insulation property such as ABS resin. As shown in FIG. 2, one side of the upper surface of the base plate 8a of the transfer unit base 8 is formed as shown in FIG. , A bifurcated groove-shaped support portion 31 for vertically supporting the bearings (not shown) at the left and right ends of the conductive (metal) shaft of the transfer roller 9 made of a conductive sponge, etc. To project. The bearing is configured such that the transfer roller 9 is pressed against the lower circumferential surface of the photosensitive drum 10 by a biasing means (not shown) such as a metallic (conductive) coil. A plurality of fin-shaped passage guide members 32 for guiding the paper P, which has passed through the transfer portion, toward the fixing unit 15 are integrally formed on the stepped portion on the base plate 8a adjacent to the support portion 31 in an upward direction. It is protruding. At least one of the bearings is made of a conductive material (metal or a composite member in which carbon black, graphite, and metal powder are dispersed in a synthetic resin).
【0012】他方、図1及び図2に示すように、高電圧
基板26の縁部を取付け支持するための支持手段とし
て、前記転写ユニット台8の台板8aから複数本の支持
足33、33を下向きに突出させ、各支持足32の下端
部には、前記高電圧基板26の縁部を係止する係合爪3
4を設けている。これにより、高電圧基板26を転写ユ
ニット台8の裏面側に予め脱落不能に装着した状態で、
転写ユニット台8を所定の箇所に装着することができ
る。On the other hand, as shown in FIGS. 1 and 2, a plurality of supporting legs 33, 33 are provided from the base plate 8a of the transfer unit base 8 as a supporting means for attaching and supporting the edge portion of the high voltage substrate 26. Are projected downward, and the engaging claws 3 for locking the edges of the high-voltage board 26 are provided at the lower ends of the support legs 32.
4 is provided. As a result, in a state where the high-voltage board 26 is attached to the back surface side of the transfer unit base 8 in advance so that it cannot be removed,
The transfer unit base 8 can be mounted at a predetermined location.
【0013】図3は別の実施例を示しており、基本的構
成は前記実施例とほぼ同じである。従って、異なってい
る部分についてのみ説明する。転写ユニット台8を下方
に開放する箱状に形成し、この箱部内に前記高電圧基板
26がすっぽり覆われるように構成している。そして、
転写ユニット台8の台板8aから下向きに一体的に突設
した4枚の側板8bのうち少なくとも対峙する2枚の側
板8bを、高電圧基板26の縁部を支持するめの支持手
段とする。FIG. 3 shows another embodiment, and the basic constitution is almost the same as that of the above embodiment. Therefore, only different parts will be described. The transfer unit base 8 is formed in a box shape that opens downward, and the high voltage substrate 26 is completely covered in the box portion. And
Of the four side plates 8b integrally projecting downward from the base plate 8a of the transfer unit base 8, at least two side plates 8b facing each other are used as supporting means for supporting the edge portion of the high-voltage board 26.
【0014】この場合、側板8bの内面には、高電圧基
板26を箱部内に押し込んだとき嵌合係合できる係合爪
39が形成されている。この実施例によれば、前記の実
施例と同様に、高電圧基板26を転写ユニット台8の裏
面側に予め脱落不能に装着した状態で、転写ユニット台
8を所定の箇所に装着することができると同時に、高電
圧基板26は電気絶縁性を有する転写ユニット台8の裏
面側箱部内にすっぽり囲まれるから、作業者が紙ジャム
除去のために通過ガイド部材32箇所に触れても、感電
することがなく安全である。In this case, on the inner surface of the side plate 8b, there is formed an engaging claw 39 which can be fitted and engaged when the high voltage board 26 is pushed into the box portion. According to this embodiment, similarly to the above-described embodiments, the transfer unit base 8 can be mounted at a predetermined position while the high-voltage board 26 is mounted on the back surface side of the transfer unit base 8 in advance so that it cannot be removed. At the same time, since the high-voltage board 26 is completely surrounded by the box on the back side of the transfer unit base 8 having an electric insulation property, even if an operator touches the passage guide member 32 to remove the paper jam, an electric shock will occur. It is safe without.
【0015】さらに、図3に示すように、転写ユニット
台8の台板8aから下向きに一体的に突設した電気絶縁
性を有する筒状のガイド体35の内径部に、導電性(金
属性等)のコイル状の端子36を配置し、該端子36の
一端を前記導電性を有する一方の軸受30(または付勢
手段30a)に接続した配線37に接続する一方、端子
36の他端(下端)を高電圧基板26の上面に形成した
平板状の電極部38に押圧接触させるのである。このよ
うに構成すれば、転写ユニット台8の裏面側に高電圧基
板26を装着する作業と同時に転写ローラ9に給電する
配線接続作業が完了するので、取付け作業を至極簡略化
することができるという効果を奏する。Further, as shown in FIG. 3, the inner diameter of the electrically insulating cylindrical guide member 35 projecting downward from the base plate 8a of the transfer unit base 8 is electrically conductive (metallic). Etc.) and the coil-shaped terminal 36 is arranged, and one end of the terminal 36 is connected to the wiring 37 connected to the bearing 30 (or the biasing means 30a) having the conductivity, while the other end of the terminal 36 ( The lower end) is pressed into contact with the flat plate-shaped electrode portion 38 formed on the upper surface of the high voltage substrate 26. According to this structure, the work of mounting the high-voltage board 26 on the rear surface side of the transfer unit base 8 and the wiring connection work for supplying power to the transfer roller 9 are completed at the same time, so that the mounting work can be extremely simplified. Produce an effect.
【0016】なお、前記支持部31に隣接した位置に
は、前記転写部位を通過した用紙Pに帯電した静電荷を
除去するための除電板40を上向きに立設し、これに隣
接する台板8a上の段部には、平板状の補助除電板41
を配置し、この補助除電板41と除電板40とを接触部
42にて電気的に接続し、除電板40等から図示しない
グランド(電位0)に接続しておく。これにより、当該
除電板40及び補助除電板41の上方箇所を通過すると
きに、用紙Pの帯電した静電荷を効率良く除去すること
ができる。At a position adjacent to the support portion 31, a static elimination plate 40 for removing the electrostatic charge charged on the sheet P passing through the transfer portion is erected upward, and a base plate adjacent thereto. A flat auxiliary charge-eliminating plate 41 is provided on the stepped portion on 8a.
Are arranged, the auxiliary static elimination plate 41 and the static elimination plate 40 are electrically connected at the contact portion 42, and the static elimination plate 40 and the like are connected to a ground (potential 0) not shown. As a result, it is possible to efficiently remove the electrostatic charge charged on the paper P when passing through the upper portion of the static elimination plate 40 and the auxiliary static elimination plate 41.
【0017】本発明は、ファクシミリや複写機等の静電
電子写真式画像形成装置における転写装置にも適用でき
ることはいうまでもない。It goes without saying that the present invention can also be applied to a transfer device in an electrostatic electrophotographic image forming apparatus such as a facsimile or a copying machine.
【0018】[0018]
【発明の作用・効果】以上に説明したように、請求項1
記載の発明の画像形成装置における転写装置は、トナー
像を担持し回転する像担持体の表面と対峙する転写部材
に転写電圧を印加し、転写部材を通過する用紙等の被記
録媒体にトナー像を転写させるように構成した画像形成
装置において、表面に転写部材の支持部と被記録媒体の
通過ガイド部材とを形成した転写ユニット台の裏面側に
は、転写部材に転写電圧を印加するための高電圧基板に
おける縁部を取付け支持するための支持手段を備えたも
のである。As described above, claim 1
A transfer device in an image forming apparatus according to the invention described above applies a transfer voltage to a transfer member that faces a surface of an image carrier that carries and rotates a toner image, and a toner image is applied to a recording medium such as a sheet that passes through the transfer member. In an image forming apparatus configured to transfer a transfer member, a transfer unit table having a support member for a transfer member and a passage guide member for a recording medium formed on the front surface is used for applying a transfer voltage to the transfer member. It is provided with a support means for mounting and supporting the edge portion of the high voltage board.
【0019】従って、本発明に従えば、転写ユニット台
には、転写部材を支持するための支持部と被記録媒体の
通過を円滑にするための通過ガイド部材と支持手段とを
備えているから、部品点数が少なくなると共に、支持部
に転写部材を装着し、高電圧基板を転写ユニット台の裏
面側にて支持手段を介して予め装着したのち、当該転写
ユニット台を所定の箇所に装着すれば、これらの部品の
取付け作業をまとめて一挙に実行できることになり、分
解作業も一箇所で行え、組立、分解作業の手間が大幅に
簡略化でき、製造コストを大幅に低減できるという効果
を奏する。Therefore, according to the present invention, the transfer unit base is provided with the supporting portion for supporting the transfer member, the passage guide member for facilitating the passage of the recording medium, and the supporting means. , The number of parts is reduced, the transfer member is mounted on the supporting portion, the high-voltage board is mounted on the back side of the transfer unit base in advance via the supporting means, and then the transfer unit base is mounted on the predetermined position. In this way, it is possible to perform the mounting work of these parts all at once, and the disassembling work can be performed at one place, and the labor of assembling and disassembling work can be greatly simplified, and the manufacturing cost can be significantly reduced. .
【0020】また、請求項2記載の発明は、請求項1記
載の画像形成装置における転写装置において、前記転写
ユニット台を裏面開放状の箱状に形成し、該箱部内に前
記高電圧基板の広幅面がほぼ覆われるように構成する一
方、前記箱部内側面に前記支持手段を設けたものであ
る。従って、本発明によれば、請求項1記載の発明の作
用・効果に加え、転写ユニット台の裏面側に装着した状
態での高電圧基板における電子部品が搭載された広幅面
がすっぽり覆われるから、紙ジャム等に際して作業者が
転写ユニット台に手を近づけても感電等する事故を未然
に防止できて安全であるという効果を奏する。According to a second aspect of the present invention, in the transfer device of the image forming apparatus according to the first aspect, the transfer unit base is formed in a box shape having an open back surface, and the high voltage substrate is formed in the box portion. While the wide surface is configured to be substantially covered, the supporting means is provided on the inner surface of the box portion. Therefore, according to the present invention, in addition to the operation and effect of the invention described in claim 1, the wide surface on which the electronic components are mounted in the high-voltage board mounted on the back side of the transfer unit base is completely covered. Even when an operator brings his or her hand close to the transfer unit base in the event of paper jam, it is possible to prevent an accident such as electric shock and it is safe.
【0021】さらに、請求項3記載の発明は、請求項1
または請求項2記載の画像形成装置における転写装置に
おいて、前記転写ユニット台の裏面側には、前記高電圧
基板広幅面に形成した電極部に対して弾性押圧して接触
する端子手段を臨ませ、該端子手段と前記転写部材に接
続した配線とを接続したものである。この発明によれ
ば、請求項1または請求項2記載の発明の作用・効果に
加え、高電圧基板を転写ユニット台の裏面側に装着する
作業と同時に転写ユニット台の裏面側から突出させた端
子手段が高電圧基板広幅面の電極部に押圧接触して電気
的に接続されるのだから、高電圧基板の取付け、取り外
しの作業と配線接続作業とが同時に実行できることにな
り、組立て分解作業が一層容易になるという効果を奏す
るのである。Furthermore, the invention according to claim 3 is the same as claim 1.
Alternatively, in the transfer device of the image forming apparatus according to claim 2, terminal means for elastically pressing and contacting the electrode portion formed on the wide surface of the high voltage substrate is provided on the rear surface side of the transfer unit base. The terminal means and the wiring connected to the transfer member are connected. According to this invention, in addition to the operation and effect of the invention according to claim 1 or 2, in addition to the work of mounting the high voltage substrate on the back side of the transfer unit base, the terminals projected from the back side of the transfer unit base are also provided. Since the means is pressed into contact with the electrode part of the wide surface of the high voltage board and electrically connected, the work of mounting and removing the high voltage board and the wiring connection work can be performed at the same time, and the assembly and disassembly work is further improved. The effect is that it becomes easy.
【図1】レーザプリンタの概略側断面図である。FIG. 1 is a schematic side sectional view of a laser printer.
【図2】転写装置の要部側断面図である。FIG. 2 is a side sectional view of a main part of a transfer device.
【図3】他の実施例の側断面図である。FIG. 3 is a side sectional view of another embodiment.
1 プリンタ 2 本体ケース 7 画像形成ユニット 8 転写ユニット台 8a 台板 8b 側板 10 感光体ドラム 11 現像装置ユニット 15 定着ユニット 26 高電圧基板 30 軸受 31 支持部 32 通過ガイド部材 33 支持足 34,39 係合爪 37 配線 38 電極部 1 Printer 2 Main Body Case 7 Image Forming Unit 8 Transfer Unit Base 8a Base Plate 8b Side Plate 10 Photosensitive Drum 11 Developing Device Unit 15 Fixing Unit 26 High Voltage Substrate 30 Bearing 31 Support Portion 32 Passage Guide Member 33 Support Foot 34, 39 Engagement Claw 37 Wiring 38 Electrode
Claims (3)
面と対峙する転写部材に転写電圧を印加し、転写部材を
通過する用紙等の被記録媒体にトナー像を転写させるよ
うに構成した画像形成装置において、表面に前記転写部
材の支持部と被記録媒体の通過ガイド部材とを形成した
転写ユニット台の裏面側には、前記転写部材に転写電圧
を印加するための高電圧基板における縁部を取付け支持
するための支持手段を備えたことを特徴とする画像形成
装置における転写装置。1. A transfer member is configured to transfer a toner image onto a recording medium such as a sheet of paper which passes through the transfer member by applying a transfer voltage to a transfer member which faces the surface of an image bearing member which carries and rotates the toner image. In the image forming apparatus, on the back side of the transfer unit base having the support portion of the transfer member and the passage guide member of the recording medium formed on the front surface, an edge of a high voltage substrate for applying a transfer voltage to the transfer member. A transfer device in an image forming apparatus, comprising a supporting means for mounting and supporting a unit.
に形成し、該箱部内に前記高電圧基板の広幅面がほぼ覆
われるように構成する一方、前記箱部内側面に前記支持
手段を設けたことを特徴とする請求項1記載の画像形成
装置における転写装置。2. The transfer unit base is formed in a box shape with an open back surface, and the wide surface of the high-voltage board is substantially covered in the box portion, while the supporting means is provided on the inner surface of the box portion. The transfer device in the image forming apparatus according to claim 1, wherein the transfer device is provided.
高電圧基板広幅面に形成した電極部に対して弾性押圧し
て接触する端子手段を臨ませ、該端子手段と前記転写部
材に接続した配線とを接続したことを特徴とする請求項
1または請求項2記載の画像形成装置における転写装
置。3. A terminal means for elastically pressing and contacting the electrode portion formed on the wide surface of the high voltage substrate is exposed on the back surface side of the transfer unit base, and is connected to the terminal means and the transfer member. The transfer device in the image forming apparatus according to claim 1, wherein the transfer device is connected to the wiring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11134494A JP3467074B2 (en) | 1994-05-25 | 1994-05-25 | Transfer device in image forming apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11134494A JP3467074B2 (en) | 1994-05-25 | 1994-05-25 | Transfer device in image forming apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07319301A true JPH07319301A (en) | 1995-12-08 |
JP3467074B2 JP3467074B2 (en) | 2003-11-17 |
Family
ID=14558823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11134494A Expired - Fee Related JP3467074B2 (en) | 1994-05-25 | 1994-05-25 | Transfer device in image forming apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3467074B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1378799A3 (en) * | 2002-07-03 | 2006-02-15 | Samsung Electronics Co., Ltd. | High voltage switching equipment of developing device for colour image forming apparatus |
US7627262B2 (en) * | 2004-11-29 | 2009-12-01 | Kyocera Mita Corporation | Image forming apparatus having high voltage circuit board and an insulative cover |
US8855518B2 (en) * | 2007-08-03 | 2014-10-07 | Samsung Electronics Co., Ltd. | Image forming apparatus |
US10042312B2 (en) | 2016-04-22 | 2018-08-07 | Canon Kabushiki Kaisha | Image forming apparatus having reduced component and assembling cost |
-
1994
- 1994-05-25 JP JP11134494A patent/JP3467074B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1378799A3 (en) * | 2002-07-03 | 2006-02-15 | Samsung Electronics Co., Ltd. | High voltage switching equipment of developing device for colour image forming apparatus |
US7627262B2 (en) * | 2004-11-29 | 2009-12-01 | Kyocera Mita Corporation | Image forming apparatus having high voltage circuit board and an insulative cover |
US8855518B2 (en) * | 2007-08-03 | 2014-10-07 | Samsung Electronics Co., Ltd. | Image forming apparatus |
US10042312B2 (en) | 2016-04-22 | 2018-08-07 | Canon Kabushiki Kaisha | Image forming apparatus having reduced component and assembling cost |
Also Published As
Publication number | Publication date |
---|---|
JP3467074B2 (en) | 2003-11-17 |
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