JPH08146273A - Optical device for electrophotographic device - Google Patents

Optical device for electrophotographic device

Info

Publication number
JPH08146273A
JPH08146273A JP28542594A JP28542594A JPH08146273A JP H08146273 A JPH08146273 A JP H08146273A JP 28542594 A JP28542594 A JP 28542594A JP 28542594 A JP28542594 A JP 28542594A JP H08146273 A JPH08146273 A JP H08146273A
Authority
JP
Japan
Prior art keywords
lens
lens barrel
seat
wrench
optical device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP28542594A
Other languages
Japanese (ja)
Inventor
Akira Sawahata
昌 澤畑
Hideho Yokogawa
秀穂 横川
Kunitomo Takahashi
國友 高橋
Yoji Hirose
洋二 広瀬
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki 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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP28542594A priority Critical patent/JPH08146273A/en
Publication of JPH08146273A publication Critical patent/JPH08146273A/en
Pending legal-status Critical Current

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  • Mechanical Optical Scanning Systems (AREA)
  • Lens Barrels (AREA)

Abstract

PURPOSE: To easily finely adjust the focal distance of a lens in a short time in an optical device for an electrophotographic device. CONSTITUTION: The adjustment of the focal distance of the lens 1 is explained based on an example shown by figure. First, while measuring a spot diameter on a photoreceptor drum or performing printing, a screw is somewhat loosened and a hexagonal wrench 6 is fitted in a groove 3 between a lens barrel 2 and a seat 5 in a state where frictional force acts between the seat 5 and the lens barrel 2, so that the wrench 6 is inserted in the fulcrum 7 of the seat 5. By moving the leading edge of the wrench 6, the lens barrel 2 is moved. In such a case, since the sufficient length of the wrench 6 functioning as a lever is secured, the delicate position of the lens 1 is finely adjusted.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は電子写真装置の光学装
置、さらに詳細には、レーザプリンタの光学装置に設け
られたレンズの焦点距離調整機構に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device of an electrophotographic apparatus, and more particularly, to a lens focal length adjusting mechanism provided in an optical device of a laser printer.

【0002】[0002]

【従来の技術】レーザプリンタにおいては、従来から、
回転多面鏡、複数の走査レンズ、及び反射鏡の組み合せ
により、レーザ光を感光ドラム上に走査することが行わ
れている。
2. Description of the Related Art In a laser printer, conventionally,
A combination of a rotary polygon mirror, a plurality of scanning lenses, and a reflecting mirror is used to scan the photosensitive drum with laser light.

【0003】レーザ光を感光ドラムに走査する上での問
題点の一つに、部品精度のバラツキによりレーザ光の結
像位置が感光ドラム上に一致せず、印字がぼけることが
ある。
One of the problems in scanning the laser beam on the photosensitive drum is that the image forming position of the laser beam does not coincide with the photosensitive drum due to variations in component precision, and the printing is blurred.

【0004】従来、レンズの焦点距離調整は、図4に示
すように、レンズ鏡胴2を直接前後動させ、レーザビー
ムの結像位置を変えることにより行っていた。
Conventionally, the focal length of a lens is adjusted by directly moving the lens barrel 2 back and forth to change the image forming position of the laser beam, as shown in FIG.

【0005】なお、図4において、1はレンズ、5は
座、4は板バネ8を介してレンズ鏡胴2と座5とを固定
するネジを示している。
In FIG. 4, 1 is a lens, 5 is a seat, and 4 is a screw for fixing the lens barrel 2 and the seat 5 via a leaf spring 8.

【0006】[0006]

【発明が解決しようとする課題】ところで、レンズの焦
点距離を調整する場合、従来のように、レンズ鏡胴2を
直接前後動させる方法にあっては、微妙な焦点距離を正
確に出すことは実際上非常な困難を伴い、焦点距離が一
寸でもズレた場合、スポット径が大きく変動し、従って
従来、前記した焦点距離の微調整には多くの手間暇を必
要としていた。
By the way, when adjusting the focal length of the lens, in the conventional method of directly moving the lens barrel 2 back and forth, it is not possible to accurately obtain a delicate focal length. In practice, it is very difficult and even if the focal length is deviated even by a slight amount, the spot diameter fluctuates greatly. Therefore, conventionally, the fine adjustment of the focal length requires a lot of time and effort.

【0007】本発明は、電子写真装置の光学装置におい
て、レンズ焦点距離の微調整を短時間のうちに簡単に行
わしめることをその目的とする。
It is an object of the present invention to easily perform fine adjustment of a lens focal length within a short time in an optical device of an electrophotographic apparatus.

【0008】[0008]

【課題を解決するための手段】前記目的は、レーザを用
いた露光装置内のレーザビーム整形部に、レーザビーム
を整形するレンズと、前記レンズを保護固定するための
レンズ鏡胴と、前記レンズ鏡胴を固定する座とを有する
電子写真装置の光学装置において、前記レンズ鏡胴と座
とに、座に設けた支点を中心に差込レバーの先端を移動
させることでレンズ鏡胴を移動させることのできる、レ
バー差込用の溝を設けることによって達成される。
The object is to provide a lens for shaping a laser beam, a lens barrel for protecting and fixing the lens in a laser beam shaping section in an exposure apparatus using a laser, and the lens. In an optical device of an electrophotographic apparatus having a seat for fixing a lens barrel, the lens barrel is moved by moving the tip of an insertion lever with respect to the lens barrel and the seat around a fulcrum provided on the seat. This is achieved by providing a possible groove for lever insertion.

【0009】[0009]

【作用】そして、本発明によれば、レンズ鏡胴と座とに
嵌合されたレバーの先端を、座に設けた支点を中心に移
動させることでレンズ鏡胴を移動させることができ、そ
の際、レバーの長さを長くとれるため、レンズの微妙な
位置を短時間のうちに微少に調整することができる。
According to the present invention, the lens barrel can be moved by moving the tip of the lever fitted to the lens barrel and the seat about the fulcrum provided on the seat. At this time, since the length of the lever can be increased, the delicate position of the lens can be finely adjusted within a short time.

【0010】[0010]

【実施例】以下、本発明を、図面にもとづいて説明する
と、図1は本発明の一実施例を示す斜視図、図2は図1
の一部破断正面図、図3は図2の縦断側面図である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
Is a partially cutaway front view, and FIG. 3 is a vertical side view of FIG.

【0011】図において、レーザビームを整形するレン
ズ1は、レンズ鏡胴2に保護固定されている。
In the figure, a lens 1 for shaping a laser beam is protected and fixed to a lens barrel 2.

【0012】また、レンズ鏡胴2と座5には、レンズ1
自身の焦点距離や他のレンズの焦点距離のバラツキをレ
ンズ1の位置で補正するため、下記のごとく機能するレ
バー差込用の溝3が設けられている。
The lens barrel 2 and the seat 5 have a lens 1
In order to correct variations in the focal length of itself and the focal lengths of other lenses at the position of the lens 1, a lever insertion groove 3 that functions as described below is provided.

【0013】次に、本実施例において、レンズ1の焦点
距離調整を行う場合について説明する。
Next, the case of adjusting the focal length of the lens 1 in this embodiment will be described.

【0014】まず、感光ドラム上のスポット径を測定す
るか、あるいは印刷を行いながら、ネジ4を少し緩め、
座5とレンズ鏡胴2との間に摩擦力が働いている状態
で、六角レンチ6をレンズ鏡胴2と座5との溝3とに嵌
合せしめ、座5の支点7に挿入する。
First, while measuring the spot diameter on the photosensitive drum or printing, loosen the screw 4 a little,
With the frictional force acting between the seat 5 and the lens barrel 2, the hexagon wrench 6 is fitted into the groove 3 between the lens barrel 2 and the seat 5, and inserted into the fulcrum 7 of the seat 5.

【0015】そして、六角レンチ6の先端を移動させる
ことにより、レンズ鏡胴2を移動させることができるも
のであって、その際、レバーとして機能する六角レンチ
6の長さを長くとれるため、レンズ1の微妙な位置を短
時間のうちに微少に調整することができる。
The lens barrel 2 can be moved by moving the tip of the hexagonal wrench 6, and at this time, the length of the hexagonal wrench 6 functioning as a lever can be increased, so that the lens The delicate position of 1 can be finely adjusted within a short time.

【0016】なお、レンズ鏡胴2の移動量は、レンズ鏡
胴2の移動量=支点7〜レンズ鏡胴2までの距離/支点
7〜レンチ6先端までの距離×レンチ6の先端移動量と
して表すことができる。
The amount of movement of the lens barrel 2 is defined as the amount of movement of the lens barrel 2 = the distance from the fulcrum 7 to the lens barrel 2 / the distance from the fulcrum 7 to the tip of the wrench 6 × the amount of movement of the tip of the wrench 6. Can be represented.

【0017】続いて、最後に、当初少し緩めておいたネ
ジ4を六角レンチ6を使って固定する。
Then, finally, the screw 4 which has been slightly loosened at the beginning is fixed using a hexagon wrench 6.

【0018】[0018]

【発明の効果】以上本発明によれば、レンズ鏡胴と座と
に嵌合されたレバーの先端を、座に設けた支点を中心に
移動させることでレンズ鏡胴を移動させることができ、
その際、レバーの長さを長くとれるため、レンズの微妙
な位置を短時間のうちに微少に調整することができる。
As described above, according to the present invention, the lens barrel can be moved by moving the tip of the lever fitted to the lens barrel and the seat about the fulcrum provided on the seat.
At that time, since the length of the lever can be increased, the delicate position of the lens can be finely adjusted within a short time.

【0019】また、レンズ鏡胴と座とに設けたレバー差
込用の溝を、保守工具の挿抜を許容する寸法の溝、たと
えば図示実施例に示すように、六角レンチの挿抜を許容
する寸法の溝とすれば、前記したレンズ焦点距離の微調
整は、レンズ鏡胴を座に固定する保守工具、たとえば六
角レンチを用いて行うことができ、焦点距離微調整に専
用の工具を殊更必要とせず、経済的である。
Further, the groove for inserting the lever provided on the lens barrel and the seat is a groove of a size that allows the insertion and removal of a maintenance tool, for example, a size that allows the insertion and removal of a hexagon wrench as shown in the illustrated embodiment. With the groove, the fine adjustment of the lens focal length can be performed by using a maintenance tool for fixing the lens barrel to the seat, for example, a hexagon wrench, and a special tool is required for fine adjustment of the focal length. It is economical.

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

【図1】本発明の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.

【図2】図1の一部破断正面図である。FIG. 2 is a partially cutaway front view of FIG.

【図3】図2の縦断側面図である。3 is a vertical side view of FIG.

【図4】従来のレンズ鏡胴形状と光軸方向レンズ位置調
整を説明するための斜視図である。
FIG. 4 is a perspective view for explaining a conventional lens barrel shape and optical axis direction lens position adjustment.

【符号の説明】[Explanation of symbols]

1…レンズ、2…レンズ鏡胴、3…レバー差込用溝、4
…ネジ、5…座、6…六角レンチ、7…支点。
1 ... Lens, 2 ... Lens barrel, 3 ... Lever insertion groove, 4
… Screws, 5… seats, 6… hexagonal wrenches, 7… fulcrum points.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 広瀬 洋二 茨城県ひたちなか市武田1060番地 日立工 機株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoji Hirose 1060 Takeda, Hitachinaka City, Ibaraki Prefecture Hitachi Koki Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 レーザを用いた露光装置内のレーザビー
ム整形部に、レーザビームを整形するレンズと、前記レ
ンズを保護固定するためのレンズ鏡胴と、前記レンズ鏡
胴を固定する座とを有する電子写真装置の光学装置にお
いて、前記レンズ鏡胴と座とに、座に設けた支点を中心
に差込レバーの先端を移動させることでレンズ鏡胴を移
動させることのできる、レバー差込用の溝を設けたこと
を特徴とする電子写真装置の光学装置。
1. A laser beam shaping unit in an exposure apparatus using a laser, a lens for shaping a laser beam, a lens barrel for protecting and fixing the lens, and a seat for fixing the lens barrel. In an optical device of an electrophotographic apparatus having the lens barrel, the lens barrel can be moved by moving the tip of the insertion lever around the fulcrum provided on the seat to the lens barrel and the seat. An optical device for an electrophotographic apparatus, characterized in that a groove is provided.
【請求項2】 請求項1において、レンズ鏡胴と座とに
設けたレバー差込用の溝は、保守工具の挿抜を許容する
寸法の溝である電子写真装置の光学装置。
2. The optical device for an electrophotographic apparatus according to claim 1, wherein the lever insertion groove provided in the lens barrel and the seat is a groove having a size that allows insertion and removal of a maintenance tool.
【請求項3】 請求項2において、レンズ鏡胴と座とに
設けたレバー差込用の溝は、六角レンチの挿抜を許容す
る寸法の溝である電子写真装置の光学装置。
3. The optical device for an electrophotographic apparatus according to claim 2, wherein the lever insertion groove provided in the lens barrel and the seat is a groove having a dimension allowing insertion and removal of a hexagon wrench.
JP28542594A 1994-11-18 1994-11-18 Optical device for electrophotographic device Pending JPH08146273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28542594A JPH08146273A (en) 1994-11-18 1994-11-18 Optical device for electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28542594A JPH08146273A (en) 1994-11-18 1994-11-18 Optical device for electrophotographic device

Publications (1)

Publication Number Publication Date
JPH08146273A true JPH08146273A (en) 1996-06-07

Family

ID=17691363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28542594A Pending JPH08146273A (en) 1994-11-18 1994-11-18 Optical device for electrophotographic device

Country Status (1)

Country Link
JP (1) JPH08146273A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10170792A (en) * 1996-12-13 1998-06-26 Fuji Photo Optical Co Ltd Optical member coupling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10170792A (en) * 1996-12-13 1998-06-26 Fuji Photo Optical Co Ltd Optical member coupling device

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