JPS6125360A - Picture reader - Google Patents
Picture readerInfo
- Publication number
- JPS6125360A JPS6125360A JP14525884A JP14525884A JPS6125360A JP S6125360 A JPS6125360 A JP S6125360A JP 14525884 A JP14525884 A JP 14525884A JP 14525884 A JP14525884 A JP 14525884A JP S6125360 A JPS6125360 A JP S6125360A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- array
- optical
- reading device
- image reading
- 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
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Abstract
Description
【発明の詳細な説明】
［技術分野］
本発明は画像読取装置に関し、特に原稿からの反射光を
集束する光学系の取付機構の改良を図ったものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image reading device, and particularly to an improvement in the mounting mechanism of an optical system that focuses reflected light from a document.
［従来技術］
第１図はこの種の画像読取装置における読取機構の一般
的構成の一例を示す。ここで、Ｘは原稿、１はその原稿
Ｘをｆ方向に搬送するための、例えばゴムで形成した搬
送ローラであり、その軸ＩＡが装置本体の所定位置に回
転自在に支持されている。３は搬送ローラに対向する位
置に設けた読取部であり、原稿Ｘの全幅にわたって原稿
にを搬送ローラｌに対し弾性的に押圧するための押え部
材としての板ばね５、原稿にを照明するための照明手段
としてのＬＥＤアレー７、原稿にからの反射光を集束す
るための集束性光伝送体アレー９、集束光の光電変換を
行う光電変換素子を設けた変換部１１、原稿の搬送方向
下流側に配置され読取位置からの原稿の離脱を円滑に行
うために原稿先端〃を案内するガイド部材１２）および
これら各部を保持する保持部材１３を有する。[Prior Art] FIG. 1 shows an example of a general configuration of a reading mechanism in this type of image reading device. Here, X is a document, and 1 is a conveyance roller made of rubber, for example, for conveying the document X in the f direction, and its axis IA is rotatably supported at a predetermined position of the main body of the apparatus. Reference numeral 3 denotes a reading unit provided at a position facing the conveyance roller; a plate spring 5 serves as a pressing member for elastically pressing the document against the conveyance roller L over the entire width of the document X; and a leaf spring 5 serves as a pressing member for illuminating the document an LED array 7 as an illumination means, a focusing light transmitter array 9 for focusing reflected light from the original, a conversion unit 11 provided with a photoelectric conversion element that performs photoelectric conversion of the focused light, and a downstream side in the conveyance direction of the original. It has a guide member 12 which is disposed on the side and guides the leading edge of the document in order to smoothly remove the document from the reading position, and a holding member 13 which holds these parts.
すなわち、搬送ローラ１の不図示の駆動手段による回転
に伴い、押え部材５により搬送ローラｌに向けて押圧さ
れている原稿には、その先端かガイド部材１２により案
内されてｆ方向に搬送されてゆく、その過程で原稿面が
ＬＥＤアレー７により照明され、その反射光が集束性光
伝送体アレー８を介して光電変換部１１に供給されて、
原稿Ｘ上の画像が順次読取られてゆく。That is, as the transport roller 1 is rotated by a drive means (not shown), the document being pressed toward the transport roller l by the presser member 5 has its leading edge guided by the guide member 12 and transported in the f direction. In the process, the surface of the document is illuminated by the LED array 7, and the reflected light is supplied to the photoelectric conversion section 11 via the convergent light transmitter array 8.
Images on document X are sequentially read.
ここで、集束性光伝送体アレー９は、光ファイバを複数
配列して成るものであり、物点から集束性光伝送体アレ
ー９の光軸方向の中心Ｃまでの距離と中心Ｃから像点ま
での距離とが等しいものである。このような集束性光伝
送体アレー９を画像読取装置に適用するにあたり、解像
度０１７Ｆ）を向上させるためには、原稿面から光電変
換部までの距離Ｔｃ、集束性光伝送体アレー３の中心Ｃ
の位置、および集束性光伝送体アレー８と光電変換部１
１との原稿搬送方向における相対位置の調整を行うこと
が望ましい。Here, the convergent light transmitter array 9 is formed by arranging a plurality of optical fibers, and the distance from the object point to the center C in the optical axis direction of the convergent light transmitter array 9 and the image point from the center C are as follows. The distance to When applying such a convergent optical transmitter array 9 to an image reading device, in order to improve the resolution (017F), the distance Tc from the document surface to the photoelectric conversion unit, the center C of the convergent optical transmitter array 3
, the position of the convergent light transmitter array 8 and the photoelectric conversion unit 1
It is desirable to adjust the relative position with respect to 1 in the document conveyance direction.
これらのうち、一般に、距離Ｔｃは固定されたものであ
り、また集束性光伝送体アレー８と光電変換部１１との
相対位置の精度は集束性光伝送体アレー８の側面を適切
な平面に当接させることによって確保することができる
。そこで、このような装置にあっては、第２図に示すよ
うに、集束性光伝送体アレー８の中心Ｃを距離Ｔｃの中
心に一致させるように調整することによってＭＴＦの向
上を図ることが好適である。Among these, the distance Tc is generally fixed, and the accuracy of the relative position between the convergent optical transmitter array 8 and the photoelectric converter 11 is determined by aligning the side surface of the convergent optical transmitter array 8 with an appropriate plane. This can be secured by bringing them into contact. Therefore, in such a device, as shown in FIG. 2, it is possible to improve the MTF by adjusting the center C of the convergent optical transmitter array 8 to coincide with the center of the distance Tc. suitable.
第３図（Ａ）および（Ｂ）は従来の画像読取装置の一例
を示す、ここで、１５は板ばねであり、保持部材１３の
内面＋３Ａに向けて集束性光伝送体アレー８の側面を押
圧し、その搬送方向の位置決めを行う、 ＋７は保持部
材１３に設けられた板ばねであり、ｓ
集束性光伝送体アレ−８底面において光伝送／係らない
有効領域外である両端部付近に当接してその支持を行う
、 １９は集束性光伝送体アレー９の図中上下方向の位
置を調整して、中心ＣをＴｃ／２の位置に一致させるた
めの調節ねじであり、集束性光伝送体アレ−８上面にお
いて光伝送に係らない有効領域外である両端部付近を押
圧する。従って、集束性光伝送体アレー８はねじ１８を
締めることによって板ばね１７がたわみ、下方に移動さ
せられ、逆にねじ１８を緩めることによって、板ばね１
７により上方に押上げられて位置調整が行われるもので
ある。3A and 3B show an example of a conventional image reading device, in which 15 is a leaf spring, and the side surface of the convergent optical transmitter array 8 is directed toward the inner surface +3A of the holding member 13. +7 is a leaf spring provided on the holding member 13, and s is a leaf spring provided on the holding member 13 near both ends of the bottom surface of the convergent light transmitting body array 8 outside the effective area where light is not transmitted/related. Numeral 19 is an adjusting screw for adjusting the vertical position of the convergent light transmitting element array 9 in the drawing to align the center C with the position Tc/2. The upper surface of the transmitter array 8 is pressed near both ends, which are outside the effective area not related to optical transmission. Therefore, by tightening the screw 18, the plate spring 17 is bent and moved downward, and conversely, by loosening the screw 18, the convergent light transmitting body array 8 is moved downward.
7 to adjust the position.
しかしながら、このような従来の画像読取装置では、集
束性光伝送体アレー９の有効領域外である両端部付近を
調整ねじ１８により押圧する構造であるので、搬送方向
の位置決めを行うばね１５のばね力によっては、第３図
（Ｂ）において一点鎖線で示すように、ねじ１８の押圧
力Ｆによって集束性光伝送体アレー１８の中央部を残し
て両端部のみがたわむので、出力画像の中央部付近の画
質が低下する問題点が生ずる。さらには、ねじ端部によ
って集束性光伝送体アレー８が破壊されることも考えら
れる。However, in such a conventional image reading device, the adjustment screw 18 presses the vicinity of both ends of the convergent light transmitting element array 9, which is outside the effective area. Depending on the force, the pressing force F of the screw 18 causes only both ends of the convergent light transmitter array 18 to bend, leaving the center part, as shown by the dashed line in FIG. 3(B), so that the center part of the output image A problem arises in that the image quality in the vicinity deteriorates. Furthermore, it is conceivable that the convergent light transmission body array 8 may be destroyed by the threaded end.
［目的］
本発明は、かかる従来の問題点に鑑みて、光学系の原稿
幅方向の全長にわたって光学系を光軸方向に適切に位置
づけることができるようにすることにより画質の向上を
図るとともに、調整部材による光学系の破壊を生じない
安全性の高い画像読取装置を提供することを目的とする
。[Objective] In view of such conventional problems, the present invention aims to improve image quality by making it possible to appropriately position an optical system in the optical axis direction over the entire length of the optical system in the document width direction, and It is an object of the present invention to provide a highly safe image reading device in which an optical system is not destroyed by an adjustment member.
かかる目的を達成するために、本発明においては、原稿
の幅方向に延在し、原稿からの反射光を伝送して集束す
るための光学系と、光学系の光伝送方向における位置を
調整する方向に移動可能な調整部材と、調整部材と係合
する第１部分および幅方向における光学系の光伝送に関
わらない部分に係合して調整部材の移動を光学系に伝達
する第２部分を有する係合部材とを具えたことを特徴と
する。In order to achieve such an objective, the present invention includes an optical system that extends in the width direction of the document and that transmits and focuses reflected light from the document, and adjusts the position of the optical system in the light transmission direction. an adjusting member movable in the direction; a first portion that engages with the adjusting member; and a second portion that engages with a portion of the optical system not involved in light transmission in the width direction to transmit movement of the adjusting member to the optical system. It is characterized by comprising an engaging member having.
［実施例］ 以下、図面を参照して本発明の詳細な説明する。[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.
第４図は本発明画像読取装置の主要部の一構成例を示し
、ここで、従来と同様に構成できるものについては対応
箇所に同一符号を付してその説明は省略する０本実施例
においては、ねじ１９の調整に応じて集束性光伝送体ア
レー９を均等に移動させる部分と集束性光伝送体アレー
８の側面を保持部材１３の内面に向けて押圧するための
板ばね部分とを有する部材２５を設ける。FIG. 4 shows an example of the configuration of the main parts of the image reading device of the present invention, and here, corresponding parts are given the same reference numerals and explanations are omitted for those parts that can be configured in the same way as in the conventional example. consists of a part that moves the convergent light transmitting body array 9 evenly according to the adjustment of the screw 19, and a leaf spring part that presses the side surface of the convergent light transmitting body array 8 toward the inner surface of the holding member 13. A member 25 is provided.
第５図はこの部材２５の一例を示す斜視図である。ここ
で、２７Ａおよび２７Ｂは、集束性光伝送体アレー８の
上面において、それぞれ、両端部付近に当接し、調整ね
じ１８に係合する位置に設けた部分、および側縁付近に
原稿幅方向に延在する部分であり、いずれも光伝送に係
らない有効領域外に設ける。２８は集束性光伝送体アレ
ー８の側面を保持部材１３の内面１３Ａに向けて押圧し
て、そのｒ方向の位置決めを行うための板ばね部分であ
り、このように、本実施例にあっては部材２５に一体に
設けている。FIG. 5 is a perspective view showing an example of this member 25. Here, 27A and 27B are provided at the upper surface of the convergent optical transmitter array 8, respectively, at a position that abuts near both ends and engages with the adjustment screw 18, and near the side edge in the document width direction. This is an extending portion, and all of them are provided outside the effective area that is not related to optical transmission. Reference numeral 28 denotes a leaf spring portion for pressing the side surface of the convergent optical transmitter array 8 toward the inner surface 13A of the holding member 13 and positioning it in the r direction. is provided integrally with the member 25.
第８図（Ａ）および（Ｂ）は、部材２５を読取装置に取
付けた場合において、それぞれ、第５図中部分２７Ａを
含むＡ−Ａ線断面および部分２７Ｂを含むＢ−Ｂ線断面
を示す、すなわち、ねじ１８を締めることによって、部
分２７Ａおよび２７Ｂは集束性光伝送体アレ−９全体を
押下しつつ図中下方に移動する。8(A) and (B) respectively show a cross section taken along the line A-A including the portion 27A in FIG. 5 and a cross section taken along the line B-B including the portion 27B in FIG. 5 when the member 25 is attached to the reading device. That is, by tightening the screw 18, the portions 27A and 27B move downward in the figure while pushing down the entire convergent light transmitter array 9.
従って、集束性光伝送体アレー８にたわみが生じること
はなく、その正確な位置調整を行うことができることに
なる。また、このような調整に際して、ねじ端部は部分
２７＾と係合し、その締めつけにより生ずる力は部分２
７Ａおよび２７Ｂを介して集束性光伝送体アレ−８上面
の広範囲にわたって作用するので、集束性光伝送体アレ
ー８が破壊されることはない。Therefore, the convergent optical transmitter array 8 is not bent, and its position can be adjusted accurately. Further, during such adjustment, the screw end engages with the portion 27^, and the force generated by the tightening is applied to the portion 27^.
Since it acts over a wide range of the upper surface of the convergent light transmitter array 8 via 7A and 27B, the convergent light transmitter array 8 is not destroyed.
加えて、本実施例においては、板ばね部分２８を部材２
５に一体に設けたので、画像読取装置の組立工程も簡単
となる。さらに、部材２５の移動に伴って板ばね部分２
８も一体に変位するので、いかなる調整位置においても
集束性光伝送体アレー９のｆ方向の適切な位置決めを行
うことができる。In addition, in this embodiment, the leaf spring portion 28 is connected to the member 2.
5, the assembly process of the image reading device is also simplified. Furthermore, as the member 25 moves, the leaf spring portion 2
8 is also displaced together, so that the convergent optical transmitter array 9 can be appropriately positioned in the f direction at any adjustment position.
なお、実施例においては、反射光の結像を得るための光
学系を集束性光伝送体アレーとしたが、これはいかなる
形態のものであってもよいことは勿論である１例えば、
マイクロレンズアレー、非球面レンズアレー等を用いる
こともできる。In addition, in the embodiment, the optical system for obtaining an image of reflected light is a convergent light transmitting body array, but it goes without saying that this may be of any form.1 For example,
A microlens array, an aspherical lens array, etc. can also be used.
［効果］
以上説明したように、本発明によれば、調整ねじと係合
し調整ねじの進みに伴って光学系全体を一様に変位させ
る部材を設けたので、光学系全体が光軸方向に適切に位
置づけられ、以て画像読取装置の出力画像の画質が向上
するとともに、調整に際して光学系が破壊されることな
く安全性の高い画像読取装置を実現できる。[Effect] As explained above, according to the present invention, a member is provided that engages with the adjusting screw and uniformly displaces the entire optical system as the adjusting screw advances, so that the entire optical system is moved in the optical axis direction. As a result, the image quality of the output image of the image reading device is improved, and the optical system is not destroyed during adjustment, making it possible to realize a highly safe image reading device.
第１図は画像読取装置の一般的構成の一例を示す斜視図
、
第２図はその光学系の位置調整を説明するための説明図
、
第３図（Ａ）および（Ｂ）は従来の光学系位置調整機構
の構成例をそれぞれ示す側面図および背面図。
第４図は本発明に係る画像読取装置の一構成例を示す斜
視図、
第５図はその光学系の位置調整を行うための部材の一例
を示す斜視図。
第６図（Ａ）および（Ｂ）は第５図示の部材を取付けた
画像読取装置の光学系位置調整機構のそれぞれ異なる断
面を示す側面図である。
１・・・搬送ローラ、
３・・・読取部、
５・・・押え部材、
７・・・ＬＥＤアレー、
３・・・集束性光伝送体アレー、
１１・・・光電変換部、
１３・・・保持部材、
１７・・・板ばね、
１８・・・調整ねじ、
２５・・・係合部材。
第５図
第６図Figure 1 is a perspective view showing an example of the general configuration of an image reading device, Figure 2 is an explanatory diagram for explaining position adjustment of the optical system, and Figures 3 (A) and (B) are conventional optical systems. FIG. 3 is a side view and a rear view showing a configuration example of a system position adjustment mechanism. FIG. 4 is a perspective view showing an example of the configuration of an image reading device according to the present invention, and FIG. 5 is a perspective view showing an example of a member for adjusting the position of the optical system. FIGS. 6A and 6B are side views showing different cross sections of the optical system position adjustment mechanism of the image reading apparatus to which the member shown in FIG. 5 is attached. DESCRIPTION OF SYMBOLS 1... Conveyance roller, 3... Reading part, 5... Pressing member, 7... LED array, 3... Focusing light transmission body array, 11... Photoelectric conversion part, 13... - Holding member, 17... Leaf spring, 18... Adjustment screw, 25... Engagement member. Figure 5 Figure 6
Claims (1)
て集束するための光学系と、 該光学系の光伝送方向における位置を調整する方向に移
動可能な調整部材と、 該調整部材と係合する第１部分および前記幅方向におけ
る前記光学系の光伝送に関わらない部分に係合して前記
調整部材の移動を前記光学系に伝達する第２部分を有す
る係合部材とを具えたことを特徴とする画像読取装置。 ２）特許請求の範囲第１項記載の画像読取装置において
、前記調整部材はねじを有し、該ねじの進みにより前記
光学系の位置を調整するようにしたことを特徴とする画
像読取装置。 ３）特許請求の範囲第１項または第２項記載の画像読取
装置において、前記光学系を保持するための保持部材の
所定部分に向けて前記光学系の側面を押圧することによ
り、前記光学系を前記原稿の読取位置に位置づける板ば
ね部材を具えたことを特徴とする画像読取装置。 ４）特許請求の範囲第１項ないし第３項のいずれかの項
に記載の画像読取装置において、前記板ばね部材を前記
係合部材に一体に形成したことを特徴とする画像読取装
置。 ５）特許請求の範囲第１項ないし第４項のいずれかの項
に記載の画像読取装置において、前記光学系を集束性光
伝送体アレーとしたことを特徴とする画像読取装置。[Claims] 1) An optical system that extends in the width direction of the document and transmits and focuses reflected light from the document, and is movable in a direction to adjust the position of the optical system in the light transmission direction. an adjusting member; a first portion that engages with the adjusting member; and a second portion that engages with a portion of the optical system that is not involved in light transmission in the width direction and transmits movement of the adjusting member to the optical system. An image reading device comprising an engaging member having: 2) The image reading device according to claim 1, wherein the adjusting member has a screw, and the position of the optical system is adjusted by advancing the screw. 3) In the image reading device according to claim 1 or 2, the optical system is removed by pressing a side surface of the optical system toward a predetermined portion of a holding member for holding the optical system. An image reading device comprising: a leaf spring member that positions the document at a reading position of the document. 4) The image reading device according to any one of claims 1 to 3, wherein the leaf spring member is integrally formed with the engagement member. 5) An image reading device according to any one of claims 1 to 4, characterized in that the optical system is a convergent light transmission body array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14525884A JPS6125360A (en) | 1984-07-14 | 1984-07-14 | Picture reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14525884A JPS6125360A (en) | 1984-07-14 | 1984-07-14 | Picture reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6125360A true JPS6125360A (en) | 1986-02-04 |
Family
ID=15380972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14525884A Pending JPS6125360A (en) | 1984-07-14 | 1984-07-14 | Picture reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6125360A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6364471A (en) * | 1986-09-05 | 1988-03-22 | Canon Inc | Image sensor |
| JPH02123168U (en) * | 1989-03-20 | 1990-10-09 | ||
| US5254847A (en) * | 1991-04-08 | 1993-10-19 | Canon Kabushiki Kaisha | Contact-type image sensor assembly having supporting structure for maintaining predetermined distance between the lens and the original and the sensor |
-
1984
- 1984-07-14 JP JP14525884A patent/JPS6125360A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6364471A (en) * | 1986-09-05 | 1988-03-22 | Canon Inc | Image sensor |
| JPH02123168U (en) * | 1989-03-20 | 1990-10-09 | ||
| US5254847A (en) * | 1991-04-08 | 1993-10-19 | Canon Kabushiki Kaisha | Contact-type image sensor assembly having supporting structure for maintaining predetermined distance between the lens and the original and the sensor |
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