JP3054892B2 - Optical head mounting structure for electrophotographic equipment - Google Patents

Optical head mounting structure for electrophotographic equipment

Info

Publication number
JP3054892B2
JP3054892B2 JP4086192A JP4086192A JP3054892B2 JP 3054892 B2 JP3054892 B2 JP 3054892B2 JP 4086192 A JP4086192 A JP 4086192A JP 4086192 A JP4086192 A JP 4086192A JP 3054892 B2 JP3054892 B2 JP 3054892B2
Authority
JP
Japan
Prior art keywords
optical head
bracket
recording medium
mounting structure
information recording
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
JP4086192A
Other languages
Japanese (ja)
Other versions
JPH05238058A (en
Inventor
功一 吉田
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4086192A priority Critical patent/JP3054892B2/en
Priority to DE69222406T priority patent/DE69222406T2/en
Priority to EP92915885A priority patent/EP0549812B1/en
Priority to US07/982,736 priority patent/US5339132A/en
Priority to PCT/JP1992/000907 priority patent/WO1993002402A1/en
Publication of JPH05238058A publication Critical patent/JPH05238058A/en
Application granted granted Critical
Publication of JP3054892B2 publication Critical patent/JP3054892B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Dot-Matrix Printers And Others (AREA)
  • Common Mechanisms (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、多数の発光素子を並設
した光学式ヘッドにより情報記録媒体に静電潜像を形成
する電子写真装置の光学式ヘッド取付構造に関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical head mounting structure for an electrophotographic apparatus for forming an electrostatic latent image on an information recording medium by an optical head having a large number of light emitting elements arranged in parallel.

【0002】この種の装置においては、一つの発光素子
から感光ドラム等の情報記録媒体に照射されたビームに
よって画像の1ドットを形成するように、発光素子から
出射するビームをレンズにより情報記録媒体の表面に収
束させている。従って、光学式ヘッドと情報記録媒体表
面との間隔を正確に保つ必要がある。
In this type of apparatus, a beam emitted from a light emitting element is formed by a lens so that one dot of an image is formed by a beam emitted from one light emitting element to an information recording medium such as a photosensitive drum. Is converged on the surface. Therefore, it is necessary to accurately maintain the distance between the optical head and the surface of the information recording medium.

【0003】[0003]

【従来の技術】従来の光学式ヘッド取付構造を、図3、
及び図4,5に示す。これらの構成,作用は次の通りで
ある。なお、これらの取付構造は、本出願人により出願
された特願平3−174997号(平成3年7月16日
出願)に開示されている。
2. Description of the Related Art A conventional optical head mounting structure is shown in FIG.
4 and 5. The configuration and operation of these are as follows. These mounting structures are disclosed in Japanese Patent Application No. 3-174997 (filed on Jul. 16, 1991) filed by the present applicant.

【0004】前者の図3(図3(A)は正面図、図3
(B)は側面図)の場合は、光学式ヘッド1は、押し付
けばね2に固定されており、光学式ヘッド1に回転自在
に設けられたギャップころ(間隔保持手段)3が、押し
付けばね2の付勢力によって感光ドラム(情報記録媒
体)4に押し付けられている。これにより、光学式ヘッ
ド1と感光ドラム4の外周との間隔が一定に保たれてい
る。
The former FIG. 3 (FIG. 3 (A) is a front view, FIG.
In the case of (B) is a side view), the optical head 1 is fixed to a pressing spring 2, and a gap roller (interval holding means) 3 rotatably provided on the optical head 1 includes a pressing spring 2. Is pressed against the photosensitive drum (information recording medium) 4 by the urging force. As a result, the distance between the optical head 1 and the outer periphery of the photosensitive drum 4 is kept constant.

【0005】ただし、これだけでは感光ドラム4の回転
運動に伴って押し付けばね2が矢印A方向に振動し、ギ
ャップころ3が感光ドラム4の表面に安定して当接しな
いので、固定ブラケット5に取り付けたゴムダンパ6で
押し付けばね2を背面から押して押し付けばね2の振動
を押さえ、印字乱れを防止している。
[0005] However, only with this, the pressing spring 2 vibrates in the direction of the arrow A with the rotation of the photosensitive drum 4 and the gap roller 3 does not stably contact the surface of the photosensitive drum 4. The pressing spring 2 is pressed from the back by the rubber damper 6 to suppress the vibration of the pressing spring 2 to prevent the printing from being disturbed.

【0006】また、後者の場合は、図4及び図5に示す
ように、光学式ヘッド1は、1対の回動ブラケット11
に固定され、該各回動ブラケット11は、固定ブラケッ
ト12に挿通された軸13の両端部に回動自在に支持さ
れる。詳しくは、一方の回動ブラケット11に形成され
た丸穴14が軸13の一端に嵌合し、他方の回動ブラケ
ット11に形成された長穴15が軸13の他端に嵌合す
る。長穴15は光学式ヘッド1から出射するビームの光
軸と平行に伸びている。
In the latter case, as shown in FIGS. 4 and 5, the optical head 1 comprises a pair of rotating brackets 11.
, And each of the rotating brackets 11 is rotatably supported by both ends of a shaft 13 inserted through the fixed bracket 12. Specifically, a round hole 14 formed in one rotating bracket 11 is fitted to one end of the shaft 13, and a long hole 15 formed in the other rotating bracket 11 is fitted to the other end of the shaft 13. The elongated hole 15 extends in parallel with the optical axis of the beam emitted from the optical head 1.

【0007】各回動ブラケット11は、トーションばね
(第1の付勢手段)16により図4の反時計方向に付勢
され、これにより、ギャップころ3は感光ドラム4の両
側部表面に押し付けられて、光学式ヘッド1と感光ドラ
ム4の間隔が一定に保たれる。なお、光学式ヘッド1の
構造については、図3では詳細図示を省略したが、図4
により詳細を説明すると次の通りである。
Each of the rotating brackets 11 is urged counterclockwise in FIG. 4 by a torsion spring (first urging means) 16, whereby the gap rollers 3 are pressed against the surfaces of both sides of the photosensitive drum 4. The distance between the optical head 1 and the photosensitive drum 4 is kept constant. Although the detailed illustration of the structure of the optical head 1 is omitted in FIG. 3, FIG.
The details will be described below.

【0008】17は発光ダイオード(発光素子)、18
はその駆動回路であり、共にプリント板19に取り付け
られている。発光ダイオード17から出射したビーム
は、収束レンズ20によって感光ドラム4の外周面上に
集束する。このビームの光軸は感光ドラム4の中心へ向
いている。
[0008] 17 is a light emitting diode (light emitting element), 18
Is a drive circuit thereof, both of which are attached to the printed board 19. The beam emitted from the light emitting diode 17 is focused on the outer peripheral surface of the photosensitive drum 4 by the converging lens 20. The optical axis of this beam is directed to the center of the photosensitive drum 4.

【0009】この後者の場合は、一方の回動ブラケット
が長穴を介し支持されているため、感光ドラムに対する
光学式ヘッドのギャップころの片当たり(固定ブラケッ
ト12,感光ドラム4等の各種部品の取り付け位置のず
れ等により発生)を解決して光学式ヘッドを適切な状態
に位置決めすることができる。
In the latter case, since one of the rotating brackets is supported via a long hole, one end of the gap roller of the optical head with respect to the photosensitive drum (the fixed bracket 12, the photosensitive drum 4, etc. And the optical head can be positioned in an appropriate state.

【0010】[0010]

【発明が解決しようとする課題】ところが、これらの従
来構造は次の問題点を有していた。 (1)前者(図3)の場合は、押し付けばね2に、ゴム
ダンパ6で押えられていない中間部分2aを中心にねじ
れや振動が発生し、感光ドラム表面に露光される画像に
印字乱れが発生して画像品質が低下する。 (2)後者(図4,5)の場合は、一方の回動ブラケッ
トに長穴が形成されているため、追従性は良いが、反面
微小振動にも追従することになって印字乱れを起こして
しまう。
However, these conventional structures have the following problems. (1) In the former case (FIG. 3), the pressing spring 2 is twisted or vibrated around the intermediate portion 2a which is not pressed by the rubber damper 6, and the image exposed on the photosensitive drum surface is disturbed in printing. Image quality is reduced. (2) In the latter case (FIGS. 4 and 5), since one of the rotating brackets has an elongated hole, the followability is good, but on the other hand, it follows fine vibrations, causing print disturbance. Would.

【0011】本発明は、印字乱れを防止することのでき
る電子写真装置の光学式ヘッド取付構造を提供すること
を目的としている。
SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical head mounting structure for an electrophotographic apparatus capable of preventing printing disturbance.

【0012】[0012]

【課題を解決するための手段】上述の目的を達成するた
め、本発明では、固定ブラケットと、情報記録媒体の軸
方向に沿って多数の発光素子を備えかつ該情報記録媒
体との間隔を保持するための1対の間隔保持手段を備え
た静電潜像形成用の光学式ヘッドを固定し、前記固定ブ
ラケットに挿通された軸の両端部に回転自在に支持され
る回動ブラケットと、前記固定ブラケットと前記回動
ラケットの間に設けられ、前記光学式ヘッドを前記両間
隔保持手段が前記情報記録媒体に当接するように付勢す
る第1の付勢手段とより成り、前記回動ブラケットの一
端には前記軸の一端に嵌合する丸穴が、他端には前記光
学式ヘッドの光軸方向にび前記軸の他端に嵌合する長
が形成された電子写真装置の光学式ヘッド取付構造に
おいて、前記固定ブラケットに、前記回動ブラケットの
他端を前記情報記録媒体に向う方向に付勢する第2の付
勢手段を一体的に設けたことを特徴とする構成とする。
Means for Solving the Problems] To achieve the above object, the present invention, a fixed bracket includes a plurality of light-emitting elements along the axial direction of the information recording medium, and a distance between the information recording medium A rotating bracket for fixing an optical head for forming an electrostatic latent image provided with a pair of interval holding means for holding, and rotatably supported at both ends of a shaft inserted through the fixed bracket; provided between the pivot Bed <br/> racket and the fixed bracket, more and first biasing means for biasing the optical head so that the two distance holding means is brought into contact with the information recording medium made, the circular hole to be fitted to one end of the shaft to one end of the pivot bracket, the elongated hole to be fitted to the other end of elongation the shaft in the direction of the optical axis of the optical head on the other end form In the formed optical head mounting structure of the electrophotographic apparatus, The constant bracket, a configuration that is characterized by providing integrally the second biasing means for biasing the other end of the pivot bracket in a direction toward the information recording medium.

【0013】[0013]

【作用】回動ブラケットの長穴形成部分は微小振動を受
けやすいが、この部分は、回動ブラケットに一体的に設
けられた第2の付勢手段により情報記録媒体に向う方向
に付勢されているため、振動を抑えることができ、印字
乱れを防止することが可能になる。
The portion of the rotary bracket where the slot is formed is susceptible to minute vibration, but this portion is urged in the direction toward the information recording medium by the second urging means provided integrally with the rotary bracket. Therefore, vibration can be suppressed, and printing disturbance can be prevented.

【0014】[0014]

【実施例】以下、図1及び図2に関連して本発明の実施
例を説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

【0015】図1は本例の電子写真装置の光学式ヘッド
取付構造を示す側面図で、図中、31は固定ブラケット
である。固定ブラケット31は、ブラケット押し付けば
ね(第2の付勢手段)32を一体的に備えた以外は図4
の固定ブラケット12と同様である。その他の構成部材
は、図4と同様なので同符号を用いている。
FIG. 1 is a side view showing an optical head mounting structure of the electrophotographic apparatus according to the present embodiment. In the figure, reference numeral 31 denotes a fixing bracket. 4 except that the fixed bracket 31 is integrally provided with a bracket pressing spring (second biasing means) 32.
Is the same as the fixing bracket 12. The other components are the same as those shown in FIG.

【0016】ブラケット押し付けばね32は、回動ブラ
ケット11の長穴15形成部分を感光ドラム4に向う方
向に付勢している。従って、従来長穴15形成部分で問
題となっていた回動ブラケット11の微振動を押えるこ
とができ、各キャップころ3を確実に感光ドラム4に押
し付けて感光ドラム4と光学式ヘッド1の間隔を一定に
保持することができる。
A bracket pressing spring 32 urges a portion of the rotating bracket 11 where the elongated hole 15 is formed in a direction toward the photosensitive drum 4. Therefore, it is possible to suppress the minute vibration of the rotating bracket 11 which has been a problem in the portion where the elongated hole 15 is formed. Can be kept constant.

【0017】その結果、従来問題となっていた印字乱れ
を防止することが可能になる。なお、ブラケット押し付
けばね32の付勢力は、微振動を抑えるだけの小さなも
ので良いため、ギャップころ3が感光ドラム4を押圧す
る力に与える影響はほとんど問題にならない。
As a result, it is possible to prevent the printing disturbance, which has conventionally been a problem. Since the biasing force of the bracket pressing spring 32 may be small enough to suppress the micro vibration, the influence of the gap roller 3 on the pressing force of the photosensitive drum 4 does not matter.

【0018】図2は本発明が適用されるプリンタ(電子
写真装置)の概要を示す側面図で、図中、101は現像
器、102は転写器、103は定着器、104はクリー
ナである。このプリンタの作用は次の通りである。
FIG. 2 is a side view showing an outline of a printer (electrophotographic apparatus) to which the present invention is applied. In the figure, 101 is a developing device, 102 is a transfer device, 103 is a fixing device, and 104 is a cleaner. The operation of this printer is as follows.

【0019】記録に際しては、感光ドラム4を矢印で示
す反時計方向に回転させ、その表面を図示しない帯電器
により一様に帯電させる。次に、該表面に、光学式ヘッ
ド1により、画像情報に対応した露光を行って静電潜像
を形成する。この静電潜像は、現像器101により現像
されてトナー像となる。
At the time of recording, the photosensitive drum 4 is rotated counterclockwise as indicated by an arrow, and its surface is uniformly charged by a charger (not shown). Next, exposure corresponding to image information is performed on the surface by the optical head 1 to form an electrostatic latent image. This electrostatic latent image is developed by the developing device 101 to become a toner image.

【0020】一方、図示しない給紙部から繰り出された
用紙が送りローラ105により転写部(イ)に送られ、
ここで、感光ドラム4上のトナー像は転写器102によ
り用紙に転写される。その用紙は定着器103に送られ
てトナー像定着が行なわれ、定着を完了した用紙は、排
出ローラ106によりスタッカ107に排出される。ま
た、転写後の感光ドラム4の表面は、クリーナ104に
より清掃される。
On the other hand, the paper fed from a paper supply unit (not shown) is sent to a transfer unit (a) by a feed roller 105,
Here, the toner image on the photosensitive drum 4 is transferred to a sheet by the transfer device 102. The sheet is sent to the fixing device 103 to fix the toner image, and the sheet on which the fixing is completed is discharged to the stacker 107 by the discharge roller 106. Further, the surface of the photosensitive drum 4 after the transfer is cleaned by the cleaner 104.

【0021】この記録時に、光学式ヘッド1の各ギャッ
プころ3は、前記のように、ブラケット押し付けばね3
2の作用により確実に感光ドラム4の両端部に圧接して
感光ドラム4と光学式ヘッド1の間隔が一定に保たれる
ため、光学式ヘッド1からのビームは確実に感光ドラム
4の表面に収束し、印字乱れは防止される。
At the time of this recording, each gap roller 3 of the optical head 1 is connected to the bracket pressing spring 3 as described above.
2, the pressure from both ends of the photosensitive drum 4 is securely pressed to keep the distance between the photosensitive drum 4 and the optical head 1 constant. The convergence is achieved, and printing disturbance is prevented.

【0022】[0022]

【発明の効果】以上述べたように、本発明によれば、光
学式ヘッドの両ギャップころを、感光ドラム表面に、片
当りを起さずに確実に押し付けることができ、印字乱れ
を防止することが可能になる。
As described above, according to the present invention, the gap rollers of the optical head can be reliably pressed against the surface of the photosensitive drum without causing any one-sided contact, thereby preventing printing disorder. It becomes possible.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例の電子写真装置の光学式ヘッド
取付構造を示す側面図である。
FIG. 1 is a side view showing an optical head mounting structure of an electrophotographic apparatus according to an embodiment of the present invention.

【図2】本発明が適用されるプリンタの概要を示す側面
図である。
FIG. 2 is a side view showing an outline of a printer to which the present invention is applied.

【図3】従来の光学式ヘッド取付構造説明図で、図3
(A)は斜視図、図3(B)は側面図である。
FIG. 3 is an explanatory view of a conventional optical head mounting structure.
3A is a perspective view, and FIG. 3B is a side view.

【図4】従来の他の光学式ヘッド取付構造を示す側面図
である。
FIG. 4 is a side view showing another conventional optical head mounting structure.

【図5】従来の他の光学式ヘッド取付構造を示す斜視図
である。
FIG. 5 is a perspective view showing another conventional optical head mounting structure.

【符号の説明】[Explanation of symbols]

1 光学式ヘッド 3 ギャップころ(間隔保持手段) 4 感光ドラム(情報記録媒体) 11 回動ブラケット 13 軸 14 丸穴 15 長穴 16 トーションばね(第1の付勢手段) 17 発光ダイオード(発光素子) 31 固定ブラケット 32 ブラケット押し付けばね(第2の付勢手段) DESCRIPTION OF SYMBOLS 1 Optical head 3 Gap roller (interval holding | maintenance means) 4 Photosensitive drum (information recording medium) 11 Rotating bracket 13 Shaft 14 Round hole 15 Elongated hole 16 Torsion spring (1st biasing means) 17 Light emitting diode (light emitting element) 31 Fixed bracket 32 Bracket pressing spring (second biasing means)

フロントページの続き (51)Int.Cl.7 識別記号 FI G03G 15/04 (56)参考文献 特開 平2−214674(JP,A) 特開 昭62−286769(JP,A) 特開 昭63−135265(JP,A) 特開 平1−279272(JP,A) 特開 平5−19602(JP,A) 特開 平1−216371(JP,A) 実開 昭63−98550(JP,U) (58)調査した分野(Int.Cl.7,DB名) B41J 2/44 B41J 2/45 B41J 2/455 B41J 25/312 B41J 25/649 G03G 15/04 - 15/04 120 Continuation of the front page (51) Int.Cl. 7 Identification symbol FI G03G 15/04 (56) References JP-A-2-214674 (JP, A) JP-A-62-286696 (JP, A) JP-A-63 JP-A-135265 (JP, A) JP-A-1-279272 (JP, A) JP-A-5-19602 (JP, A) JP-A-1-216371 (JP, A) Japanese Utility Model Laid-Open No. 63-98550 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) B41J 2/44 B41J 2/45 B41J 2/455 B41J 25/312 B41J 25/649 G03G 15/04-15/04 120

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 固定ブラケット(31)と、 情報記録媒体(4)の軸方向に沿って多数の発光素子
(17)を備え、かつ該情報記録媒体(4)との間隔を
保持するための1対の間隔保持手段(3)を備えた静電
潜像形成用の光学式ヘッド(1)を固定し、前記固定ブ
ラケット(31)に挿通された軸(13)の両端部に回
転自在に支持される回動ブラケット(11)と、 前記固定ブラケット(31)と前記回動ブラケット(1
1)の間に設けられ、前記光学式ヘッド(1)を前記両
間隔保持手段(3)が前記情報記録媒体(4)に当接す
るように付勢する第1の付勢手段(16)とより成り、 前記回動ブラケット(11)の一端には前記軸(13)
の一端に嵌合する丸穴(14)が、他端には前記光学式
ヘッド(1)の光軸方向に伸び前記軸(13)の他端に
嵌合する長穴(15)が形成された電子写真装置の光学
式ヘッド取付構造において、 前記固定ブラケット(31)に、前記回動ブラケット
(11)の他端を前記情報記録媒体(4)に向う方向に
付勢する第2の付勢手段(32)を一体的に設けたこと
を特徴とする電子写真装置の光学式ヘッド取付構造。
1. A fixing bracket (31), comprising a plurality of light emitting elements (17) along an axial direction of an information recording medium (4), and for maintaining a distance from the information recording medium (4). An optical head (1) for forming an electrostatic latent image provided with a pair of spacing means (3) is fixed, and is rotatably mounted on both ends of a shaft (13) inserted through the fixing bracket ( 31 ). The rotating bracket (11) supported, the fixed bracket ( 31 ) and the rotating bracket (1)
A first urging means (16) provided between the first and second optical heads, for urging the optical head (1) so that the both spacing means (3) comes into contact with the information recording medium (4); The shaft (13) is provided at one end of the rotating bracket (11).
A round hole (14) that fits into one end of the optical head (1), and an elongated hole (15) that extends in the optical axis direction of the optical head (1) and fits into the other end of the shaft (13) is formed in the other end. In the optical head mounting structure for an electrophotographic apparatus, a second bias for biasing the other end of the rotating bracket (11) to the fixed bracket (31) in a direction toward the information recording medium (4). An optical head mounting structure for an electrophotographic apparatus, wherein the means (32) is provided integrally.
JP4086192A 1991-07-16 1992-02-27 Optical head mounting structure for electrophotographic equipment Expired - Fee Related JP3054892B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP4086192A JP3054892B2 (en) 1992-02-27 1992-02-27 Optical head mounting structure for electrophotographic equipment
DE69222406T DE69222406T2 (en) 1991-07-16 1992-07-16 ASSEMBLY STRUCTURE FOR AN ARRANGEMENT OF LIGHT-EMITTING ELEMENTS IN AN ELECTROPHOTOGRAPHIC DEVICE
EP92915885A EP0549812B1 (en) 1991-07-16 1992-07-16 Light emission device array fitting structure of electrophotographic apparatus
US07/982,736 US5339132A (en) 1991-07-16 1992-07-16 Mount structure of a light emitting element array in electronic photographic apparatus
PCT/JP1992/000907 WO1993002402A1 (en) 1991-07-16 1992-07-16 Light emission device array fitting structure of electrophotographic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4086192A JP3054892B2 (en) 1992-02-27 1992-02-27 Optical head mounting structure for electrophotographic equipment

Publications (2)

Publication Number Publication Date
JPH05238058A JPH05238058A (en) 1993-09-17
JP3054892B2 true JP3054892B2 (en) 2000-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP4086192A Expired - Fee Related JP3054892B2 (en) 1991-07-16 1992-02-27 Optical head mounting structure for electrophotographic equipment

Country Status (1)

Country Link
JP (1) JP3054892B2 (en)

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Also Published As

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