JP3104107B2 - Image reading unit - Google Patents
Image reading unitInfo
- Publication number
- JP3104107B2 JP3104107B2 JP04236024A JP23602492A JP3104107B2 JP 3104107 B2 JP3104107 B2 JP 3104107B2 JP 04236024 A JP04236024 A JP 04236024A JP 23602492 A JP23602492 A JP 23602492A JP 3104107 B2 JP3104107 B2 JP 3104107B2
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- reflection
- reflecting
- reflected
- reflection mirror
- 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
Links
- 238000003384 imaging method Methods 0.000 claims description 29
- 239000011521 glass Substances 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000005286 illumination Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Electrophotography Configuration And Component (AREA)
- Facsimile Heads (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は画像の読み取り用ユニッ
トに係り、特に読み取り用ユニットに複数の反射ミラ
ー、固体撮像素子等が収納された画像の読み取り用ユニ
ットに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading unit, and more particularly to an image reading unit in which a plurality of reflection mirrors, solid-state image pickup devices, and the like are stored in the reading unit.
【０００２】[0002]
【従来の技術】従来、この種の画像の読み取り用ユニッ
トは図３に示すように、遮光部材で形成された読み取り
用ユニット本体（ケース）１０内に、光源１２、１２、
反射ミラー１４、１６、１８、２０、２２、２４、結像
レンズ２６、及び固体撮像素子（ＣＣＤ）２８が収納さ
れて構成される。2. Description of the Related Art Conventionally, as shown in FIG. 3, this type of image reading unit includes a light source 12, 12 and a light source 12 inside a reading unit body (case) 10 formed of a light shielding member.
The reflection mirrors 14, 16, 18, 20, 22, and 24, the imaging lens 26, and the solid-state imaging device (CCD) 28 are housed therein.
【０００３】この読み取り用ユニットは、プラテンガラ
ス３０上に載置された原稿３２の読み取り時に、光源１
２、１２から原稿３２に向けて光を照射しながらガイド
シャフト３４に沿って矢印Ａ方向に移動して原稿３０を
走査し、走査した光を前記反射ミラー１４乃至２４で複
数回反射させて結像レンズ２６で集光し、この集光した
光束３６を前記固体撮像素子２６上で結像させている。[0005] The reading unit reads a light source 1 when reading a document 32 placed on a platen glass 30.
While irradiating light from 2, 12 to the original 32, the original 30 is moved along the guide shaft 34 in the direction of arrow A to scan the original 30, and the scanned light is reflected multiple times by the reflection mirrors 14 to 24 to form a connection. The light is condensed by the image lens 26, and the condensed light flux 36 forms an image on the solid-state imaging device 26.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
画像の読み取り用ユニットは、原稿３２を走査した光を
反射させる回数分だけ反射ミラー１４乃至２４を設けて
いるので、大型になり、また反射ミラーの取付工数が増
大するという欠点がある。本発明はこのような事情に鑑
みてなされたもので、小型化でき、且つ反射ミラーの取
付工数を削減することができる画像の読み取り用ユニッ
トを提供することを目的とする。However, since the conventional image reading unit is provided with the reflecting mirrors 14 to 24 as many times as the number of times of reflecting the light obtained by scanning the original 32, the size becomes large. There is a drawback that the number of mounting steps increases. The present invention has been made in view of such circumstances, and has as its object to provide an image reading unit that can be reduced in size and that can reduce the number of man-hours for attaching a reflection mirror.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記目的を達
成するために、プラテンガラス上に載置された原稿に光
を照射する光源と、前記原稿で反射した光を反射させる
複数の反射ミラーと、複数の反射ミラーの最後段に配置
された反射ミラーで反射された前記光を結像する結像レ
ンズと、結像レンズの結像部に配置された撮像部と、が
収納された画像の読み取り用ユニットに於いて、前記複
数の反射ミラーは第１、第２、第３、第４反射ミラーで
構成され、第１反射ミラーは、原稿の下方で原稿からの
反射光を受ける位置に斜めに配置され、第２反射ミラー
は、第１反射ミラーの側方で第１反射ミラーに対面する
位置に斜めに配置され、第３反射ミラーは、第２反射ミ
ラーの上方で第２反射ミラーに対面する位置に斜めに配
置され、第４反射ミラーは、第３反射ミラーの側方で縦
方向に配置され、前記結像レンズは、第１、第２反射ミ
ラーの側方に配置され、第１反射ミラーは、原稿からの
反射光を第２反射ミラーに向けて側方に反射させ、第２
反射ミラーは、前記反射光を第３反射ミラーに向けて上
方に反射させ、第３反射ミラーは、前記反射光を第４反
射ミラーに向けて側方に反射させ、第４反射ミラーは、
前記反射光を前記第３反射ミラーに向けて側方に反射さ
せ、前記第３反射ミラーは、前記反射光を前記第２反射
ミラーに向けて下方に反射させ、前記第２反射ミラー
は、前記反射光を前記結像レンズに向けて側方に反射さ
せて前記結像レンズに導き、前記第２、第３反射ミラー
は２回反射させるに充分な大きさに形成されていること
を特徴としている。In order to achieve the above object, the present invention provides a light source for irradiating a document placed on a platen glass with light, and a plurality of reflectors for reflecting light reflected on the document. A mirror, an imaging lens configured to image the light reflected by the reflection mirror disposed at the last stage of the plurality of reflection mirrors, and an imaging unit disposed at an imaging unit of the imaging lens are housed. In the image reading unit, the plurality of reflection mirrors include first, second, third, and fourth reflection mirrors, and the first reflection mirror is located at a position below the document to receive light reflected from the document. The second reflection mirror is disposed obliquely at a position facing the first reflection mirror on the side of the first reflection mirror, and the third reflection mirror is disposed above the second reflection mirror. Obliquely placed at the position facing the mirror, 4th reflection The mirror is disposed in the vertical direction on the side of the third reflection mirror, the imaging lens is disposed on the side of the first and second reflection mirrors, and the first reflection mirror transmits reflected light from the document to the first side. 2 Reflect to the side to the reflecting mirror,
The reflecting mirror reflects the reflected light upward toward a third reflecting mirror, the third reflecting mirror reflects the reflected light sideways toward a fourth reflecting mirror, and the fourth reflecting mirror includes:
The reflected light is laterally reflected toward the third reflecting mirror, the third reflecting mirror reflects the reflected light downward toward the second reflecting mirror, and the second reflecting mirror is The reflected light is laterally reflected toward the imaging lens and guided to the imaging lens, and the second and third reflection mirrors are formed large enough to reflect twice. I have.
【０００６】[0006]
【作用】本発明によれば、読み取り用ユニットに収納さ
れた複数の反射ミラーのうち、少なくとも１枚の反射ミ
ラーで原稿等で反射した光を異なる方向に複数回反射さ
せて結像レンズに導くようにした。これにより、光を反
射させる回数分だけ反射ミラーを設けている従来の画像
の読み取り用ユニットと比較して、反射ミラーの枚数を
少なくすることができるので、小型化することができ、
また反射ミラーの取付工数を削減することができる。According to the present invention, of a plurality of reflecting mirrors housed in a reading unit, at least one reflecting mirror reflects light reflected from an original or the like a plurality of times in different directions and guides the light to an imaging lens. I did it. This makes it possible to reduce the number of reflecting mirrors as compared with a conventional image reading unit in which the reflecting mirrors are provided by the number of times of reflecting light, so that the size can be reduced.
Also, the number of steps for mounting the reflection mirror can be reduced.
【０００７】[0007]
【実施例】以下添付図面に従って本発明に係る画像の読
み取り用ユニットの好ましい実施例を詳説する。図１に
は、画像の読み取り用ユニット４０が複写機に適用され
た参考例を示し、図３に示した従来例中と同一若しくは
類似の部材については同一の符号を付して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an image reading unit according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a reference example in which an image reading unit 40 is applied to a copying machine, and the same or similar members as those in the conventional example shown in FIG.
【０００８】図１に示す読み取り用ユニット４０は、遮
光部材で形成された読み取り用ユニット本体４２内に、
一対の照明ランプ１２、１２、反射ミラー４４、４６、
４８、５０、５２、結像レンズ２６、及び固体撮像素子
２８等が収納されて構成される。前記読み取り用ユニッ
ト４０は、プラテンガラス３０上に載置された原稿３２
の複写時に、前記照明ランプ１２、１２から光を原稿３
２に向けて照射しながらガイドシャフト３４に沿って矢
印Ａ方向に移動して原稿３２を走査する。そして、走査
した光を前記反射ミラー４４→反射ミラー４６→反射ミ
ラー４８→反射ミラー５０→反射ミラー５２→反射ミラ
ー５０の順で６回反射させることにより、光路長を伸ば
して結像レンズ２６で集光し、この集光した光束３６を
前記固体撮像素子２８上に結像する。The reading unit 40 shown in FIG. 1 includes a reading unit main body 42 formed of a light shielding member.
A pair of illumination lamps 12, 12, reflecting mirrors 44, 46,
48, 50, 52, the imaging lens 26, the solid-state imaging device 28, and the like are housed therein. The reading unit 40 includes a document 32 placed on the platen glass 30.
When copying the original, light from the illumination lamps 12
The document 32 is moved in the direction of arrow A along the guide shaft 34 while irradiating the document 2 to scan the document 32. Then, the scanned light is reflected six times in the order of the reflection mirror 44 → reflection mirror 46 → reflection mirror 48 → reflection mirror 50 → reflection mirror 52 → reflection mirror 50, so that the optical path length is extended and the imaging lens 26 The light is condensed, and the condensed light flux 36 forms an image on the solid-state imaging device 28.
【０００９】前記結像レンズ２６は鏡胴５４に保持され
ており、複写倍率に応じて光軸上を鏡胴５４と共に矢印
Ｂ、Ｃ方向に移動することができる。また、前記固体撮
像素子２８には該固体撮像素子２８のドライバ基板５６
が接続されている。一方、前記反射ミラー５０は、反射
ミラー４８で反射された光を反射ミラー５２に向けて反
射させると共に、この反射ミラー５２で反射された光を
結像レンズ２６に向けて反射可能な大きさで、且つ反射
可能な角度で取り付けられている。The imaging lens 26 is held by a lens barrel 54, and can move on the optical axis in the directions of arrows B and C together with the lens barrel 54 in accordance with the copying magnification. The solid-state imaging device 28 includes a driver board 56 of the solid-state imaging device 28.
Is connected. On the other hand, the reflection mirror 50 reflects the light reflected by the reflection mirror 48 toward the reflection mirror 52 and has a size capable of reflecting the light reflected by the reflection mirror 52 toward the imaging lens 26. , And at an angle that allows reflection.
【００１０】このように構成された読み取り用ユニット
４０によれば、反射ミラー４４乃至５２のうち１枚の反
射ミラー５０を、前記反射ミラー４８で反射された光を
反射ミラー５２側と、反射ミラー５２で反射された光を
結像レンズ２６側とに２回反射させるように取り付けた
ので、反射させる回数分だけ反射ミラーを取り付ける従
来の画像の読み取り用ユニットと比較して、反射ミラー
枚数を少なくできる。According to the reading unit 40 constructed as described above, one of the reflecting mirrors 44 to 52 is used to set the reflecting mirror 50 so that the light reflected by the reflecting mirror 48 is Since the light reflected at 52 is attached to the imaging lens 26 side so as to be reflected twice, the number of reflecting mirrors is smaller than that of a conventional image reading unit in which a reflecting mirror is attached by the number of times of reflection. it can.
【００１１】従って、参考例によれば、従来の読み取り
用ユニットと比較して小型化できると共に、反射ミラー
の取付工数を削減できる。尚、参考例では１枚の反射ミ
ラー５０を、異なる方向に２回反射させるように取り付
けたが、これに限られるものではなく、複数枚の反射ミ
ラーで複数回反射させるようにしても良い。これによ
り、読み取り用ユニット４０を更に小型化でき、反射ミ
ラーの取付工数をより削減できる。Therefore, according to the reference example, it is possible to reduce the size as compared with the conventional reading unit, and to reduce the number of steps for mounting the reflection mirror. In the reference example, one reflecting mirror 50 is mounted so as to reflect twice in different directions. However, the present invention is not limited to this. The reflecting mirror 50 may be reflected plural times by a plurality of reflecting mirrors. This makes it possible to further reduce the size of the reading unit 40 and further reduce the number of man-hours for mounting the reflection mirror.
【００１２】図２には、本発明に係る画像の読み取り用
ユニット５８の実施例を示し、図１に示した参考例と同
一若しくは類似の部材については同一の符号を付してそ
の説明は省略する。図２に示す読み取り用ユニット本体
４２内には、第１〜第４反射ミラーである、反射ミラー
６０、６２、６４、６６が収納され、これらの反射ミラ
ー６０乃至６６は、原稿３２から反射された光を反射ミ
ラー６０→反射ミラー６２→反射ミラー６４→反射ミラ
ー６６→反射ミラー６４→反射ミラー６２の順で６回反
射させて、結像レンズ２６で集光するように配置されて
いる。即ち、２枚の反射ミラー６２、６４が、前記光を
異なる方向に２回反射可能な大きさで、且つ２回反射可
能な角度で取り付けられている。FIG. 2 shows an embodiment of an image reading unit 58 according to the present invention. The same or similar members as those of the reference example shown in FIG. I do. In the reading unit main body 42 shown in FIG. 2, first to fourth reflecting mirrors, ie, reflecting mirrors 60, 62, 64, and 66 are housed, and these reflecting mirrors 60 to 66 are reflected from the original 32. The reflected light is reflected six times in the order of the reflection mirror 60 → the reflection mirror 62 → the reflection mirror 64 → the reflection mirror 66 → the reflection mirror 64 → the reflection mirror 62, and is condensed by the imaging lens 26. That is, the two reflecting mirrors 62 and 64 are attached in such a size that the light can be reflected twice in different directions and at an angle that allows the light to be reflected twice.
【００１３】このように構成された読み取り用ユニット
５８によれば、反射ミラー６０乃至６６のうち２枚の反
射ミラー６２、６４を、異なる方向に２回反射させるよ
うに取り付けたので、反射させる回数分だけ反射ミラー
を取り付ける従来の画像の読み取り用ユニットと比較し
て、反射ミラーの枚数を大幅に少なくできる。従って、
本実施例によれば、従来の読み取り用ユニットと比較し
て小型化できると共に、反射ミラーの取付工数を削減で
きる。According to the reading unit 58 constructed as described above, the two reflecting mirrors 62 and 64 of the reflecting mirrors 60 to 66 are mounted so as to reflect twice in different directions. The number of reflecting mirrors can be greatly reduced as compared with a conventional image reading unit in which a reflecting mirror is mounted. Therefore,
According to this embodiment, it is possible to reduce the size as compared with the conventional reading unit and to reduce the number of man-hours for mounting the reflection mirror.
【００１４】また、１枚の反射ミラー５０で２回反射さ
せる参考例（図１参照）と比較して、反射ミラーを１枚
少なくできるので、読み取り用ユニット４２内に他目的
スペース６８を形成することができる。尚、実施例では
２枚の反射ミラー６２、６４を異なる方向に２回反射さ
せるように取り付けたが、これに限られるものではな
く、３枚以上の反射ミラーで複数回反射させても良い。
これにより、読み取り用ユニットを更に小型化でき、反
射ミラーの取付け工数をより削減できる。Since the number of reflecting mirrors can be reduced by one compared with the reference example (see FIG. 1) in which one reflecting mirror 50 reflects light twice, another space 68 is formed in the reading unit 42. be able to. In the embodiment, the two reflecting mirrors 62 and 64 are mounted so as to reflect twice in different directions. However, the present invention is not limited to this. The reflecting mirrors 62 and 64 may be reflected plural times by three or more reflecting mirrors.
This makes it possible to further reduce the size of the reading unit and to further reduce the number of steps for attaching the reflection mirror.
【００１５】また、本実施例では、複写機に適用した場
合について説明したが、ＦＡＸやコンピュータの画像の
読み取り用にも適用できる。In this embodiment, a case where the present invention is applied to a copying machine has been described. However, the present invention can also be applied to a facsimile or a computer for reading images.
【００１６】[0016]
【発明の効果】以上説明したように本発明に係る画像の
読み取り用ユニットによれば、読み取り用ユニットに収
納された複数の反射ミラーのうち、少なくとも１枚の反
射ミラーで原稿等で反射した光を異なる方向に複数回反
射させて結像レンズに導くようにした。これにより、光
を反射させる回数分だけ反射ミラーを設けている従来の
画像の読み取り用ユニットと比較して、反射ミラーの枚
数を少なくすることができるので小型化することがで
き、また反射ミラーの取付工数を削減することができ
る。As described above, according to the image reading unit of the present invention, of the plurality of reflecting mirrors housed in the reading unit, at least one of the reflecting mirrors reflects light reflected from an original or the like. Is reflected a plurality of times in different directions and guided to the imaging lens. As a result, the number of reflecting mirrors can be reduced as compared with a conventional image reading unit provided with a reflecting mirror by the number of times of reflecting light, so that the size of the reflecting mirror can be reduced. Installation man-hours can be reduced.
【図１】画像の読み取り用ユニットの参考例を示す断面
図FIG. 1 is a cross-sectional view showing a reference example of an image reading unit.
【図２】本発明に係る画像の読み取り用ユニットの実施
例を示す断面図FIG. 2 is a sectional view showing an embodiment of an image reading unit according to the present invention.
【図３】従来の画像の読み取り用ユニットの実施例を示
す断面図FIG. 3 is a sectional view showing an embodiment of a conventional image reading unit.
１２…照明ランプ ２６…結像レンズ ２８…固体撮像素子 ３０…プラテンガラス ３２…原稿 ４０、５８…読み取り用ユニット ４４、４６、４８、５０、５２、６０、６２、６４、６
６…反射ミラー12 Illumination lamp 26 Imaging lens 28 Solid-state image sensor 30 Platen glass 32 Document 40, 58 Reading unit 44, 46, 48, 50, 52, 60, 62, 64, 6
6 ... Reflection mirror
Claims (1)
を照射する光源と、前記原稿で反射した光を反射させる
複数の反射ミラーと、複数の反射ミラーの最後段に配置
された反射ミラーで反射された前記光を結像する結像レ
ンズと、結像レンズの結像部に配置された撮像部と、が
収納された画像の読み取り用ユニットに於いて、前記複数の反射ミラーは第１、第２、第３、第４反射ミ
ラーで構成され、 第１反射ミラーは、原稿の下方で原稿からの反射光を受
ける位置に斜めに配置され、 第２反射ミラーは、第１反射ミラーの側方で第１反射ミ
ラーに対面する位置に斜めに配置され、 第３反射ミラーは、第２反射ミラーの上方で第２反射ミ
ラーに対面する位置に斜めに配置され、 第４反射ミラーは、第３反射ミラーの側方で縦方向に配
置され、 前記結像レンズは、第１、第２反射ミラーの側方に配置
され、 第１反射ミラーは、原稿からの反射光を第２反射ミラー
に向けて側方に反射させ、 第２反射ミラーは、前記反射光を第３反射ミラーに向け
て上方に反射させ、 第３反射ミラーは、前記反射光を第４反射ミラーに向け
て側方に反射させ、 第４反射ミラーは、前記反射光を前記第３反射ミラーに
向けて側方に反射させ、 前記第３反射ミラーは、前記反射光を前記第２反射ミラ
ーに向けて下方に反射させ、 前記第２反射ミラーは、前記反射光を前記結像レンズに
向けて側方に反射させて前記結像レンズに導き、 前記第２、第３反射ミラーは２回反射させるに充分な大
きさに形成されている ことを特徴とする画像の読み取り
用ユニット。And 1. A light source for irradiating light to the document placed on the platen glass, and a plurality of reflecting mirrors for the light reflected by the original anti-Isa, reflected arranged in a plurality of last stage of the reflection mirror An imaging lens that forms an image of the light reflected by the mirror, and an imaging unit disposed in an imaging unit of the imaging lens, in a unit for reading an image stored therein, the plurality of reflection mirrors are First, second, third, fourth reflection
It consists of color, the first reflection mirror, receiving a reflected light from the document under the document
And the second reflection mirror is located on the side of the first reflection mirror.
The third reflecting mirror is disposed obliquely at a position facing the mirror , and the third reflecting mirror is located above the second reflecting mirror.
The fourth reflecting mirror is disposed at an angle to the position facing the mirror , and the fourth reflecting mirror is disposed in the vertical direction on the side of the third reflecting mirror.
And the imaging lens is disposed on a side of the first and second reflection mirrors.
And the first reflection mirror converts the reflected light from the original into a second reflection mirror.
And the second reflection mirror directs the reflected light toward a third reflection mirror.
Is reflected upward Te, third reflecting mirror directs the reflected light to the fourth reflecting mirror
And the fourth reflecting mirror reflects the reflected light to the third reflecting mirror.
The third reflection mirror reflects the reflected light toward the second reflection mirror.
And the second reflection mirror reflects the reflected light to the imaging lens.
To the image forming lens, and the second and third reflecting mirrors are large enough to reflect twice.
An image reading unit characterized by being formed in a size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04236024A JP3104107B2 (en) | 1992-09-03 | 1992-09-03 | Image reading unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04236024A JP3104107B2 (en) | 1992-09-03 | 1992-09-03 | Image reading unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0686013A JPH0686013A (en) | 1994-03-25 |
| JP3104107B2 true JP3104107B2 (en) | 2000-10-30 |
Family
ID=16994639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04236024A Expired - Fee Related JP3104107B2 (en) | 1992-09-03 | 1992-09-03 | Image reading unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3104107B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3191151U (en) * | 2013-12-27 | 2014-06-12 | スペランザジャパン株式会社 | Beauty face roller |
| US20230308578A1 (en) * | 2022-03-28 | 2023-09-28 | Fujifilm Business Innovation Corp. | Image-reading apparatus and image-forming system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3889656B2 (en) | 2001-05-14 | 2007-03-07 | ニスカ株式会社 | Image reading unit and image reading apparatus |
-
1992
- 1992-09-03 JP JP04236024A patent/JP3104107B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3191151U (en) * | 2013-12-27 | 2014-06-12 | スペランザジャパン株式会社 | Beauty face roller |
| US20230308578A1 (en) * | 2022-03-28 | 2023-09-28 | Fujifilm Business Innovation Corp. | Image-reading apparatus and image-forming system |
| US11870961B2 (en) * | 2022-03-28 | 2024-01-09 | Fujifilm Business Innovation Corp. | Image-reading apparatus and image-forming system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0686013A (en) | 1994-03-25 |
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