JPH04131837A - Illuminator - Google Patents

Abstract

PURPOSE:To stabilize rising characteristic at the time of lighting by providing a movable light source position adjusting member which integrally holds a light source and a proximity conductor. CONSTITUTION:A fluorescent lamp 3 being the light source is simply fixed to the U-shaped pawl 5a of the light source position adjusting member 5. The proximity conductor 4 is nearly as long as the fluorescent lamp 3, and fixed in an up-and-down direction by the other pawl 5c of the member 5 and fixed in a right-and-left direction by a wall 5b set in one part of the member 5, then the fluorescent lamp 3 and the proximity conductor 4 are set in an illuminating device with a uniform gap. The member 5 can move in a direction parallel with an original 1 in a state where it simultaneously holds the fluorescent lamp 3 and the proximity conductor 4, and is moved according to the state of illuminance distribution on a photosensitive body 10 so as to obtain the appropriate illuminance distribution. Thus, the lighting characteristic of the light source is stabilized without increasing production cost.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、電子写真式複写機、プリンターファックスな
どの原稿面の反射光を感光体に結（象させる照明系を有
する画像形成装置に用いるのに適した照明装置に関する
。Detailed Description of the Invention (Industrial Field of Application) The present invention is used in image forming apparatuses such as electrophotographic copying machines, printers, fax machines, etc., which have an illumination system that focuses reflected light from the surface of a document on a photoreceptor. This invention relates to a lighting device suitable for.

（従来の技術） 従来、第４図に示すように、蛍光灯１０３などの光源の
光束を反射部材１０７．１０８を介して、原稿ガラス１
０２に保持された原稿１０１に照射し、その反射光を感
光体１１０表面に導ひく照明装置においては、蛍光灯１
０３の点灯初期の立上り特性を向上させるために、光源
としての蛍光灯１０３の長平方向近傍に近接導体１０４
を設置するのが普通である。(Prior Art) Conventionally, as shown in FIG.
In the illumination device that illuminates the original 101 held by the fluorescent lamp 1 and guides the reflected light to the surface of the photoreceptor 110, the fluorescent lamp 1
In order to improve the rising characteristics of the fluorescent lamp 103 at the initial stage of lighting, a conductor 104 is placed near the fluorescent lamp 103 as a light source in the longitudinal direction.
It is common to install .

例えば、蛍光灯１０３の原稿面への光束を妨げない近傍
に銅板やアルミ板又、基板上のパターンなどの導体を設
置し、蛍光灯、？３、対峙の陰極放電性を向上させ、点
灯立上り時間を短縮させている。For example, a conductor such as a copper plate, an aluminum plate, or a pattern on a board may be installed in the vicinity of the fluorescent lamp 103 so as not to interfere with the luminous flux of the fluorescent lamp 103 toward the document surface. 3. Improved cathode discharge performance and shortened lighting start-up time.

（発明が解決しようとする課題） しかしながら、上記従来例においては、蛍光灯１０３の
照度分布はかならずしも一定ではなく、蛍光灯１０３か
らの光束が原稿１０１面に反射し結像レンズ１０９に導
かれて、感光体１１０に入射する照度分布がある一定域
の範囲内に入るように、光源としての蛍光灯１０３の位
置を調整する必要がある。(Problem to be Solved by the Invention) However, in the above conventional example, the illuminance distribution of the fluorescent lamp 103 is not necessarily constant, and the luminous flux from the fluorescent lamp 103 is reflected on the surface of the original 101 and guided to the imaging lens 109. It is necessary to adjust the position of the fluorescent lamp 103 as a light source so that the illuminance distribution incident on the photoreceptor 110 falls within a certain range.

このため、光源である蛍光灯１０３は光源位置調整部材
１０５に保持された状態で、ビン１０６によって枠体１
１１に、近接導体１０４は、枠体１１１に、別々に固定
されていて、調整のために蛍光灯１０３のみを移動させ
る場合、前記蛍光灯１０３と近接導体１０４との距離が
離れる方向に調整しなければならない照明装置では、前
記近接導体１０４の（９割が減少し、蛍光灯、６灯立上
り特性において、個々の照明装置にバラツキが発生し、
製品としての品質に悪影響を与えるという欠点があった
。Therefore, the fluorescent lamp 103 serving as the light source is held by the light source position adjustment member 105, and the frame body 103 is held by the bottle 106.
11, the proximity conductor 104 is fixed separately to the frame 111, and when only the fluorescent lamp 103 is moved for adjustment, the distance between the fluorescent lamp 103 and the proximity conductor 104 is adjusted in the direction of increasing distance. In the case of lighting devices in which the proximity conductor 104 is reduced by 90%, variations occur among individual lighting devices in the rise characteristics of fluorescent lamps and 6 lamps.
This had the disadvantage of adversely affecting the quality of the product.

本発明は上記課題を解決するためになされたもので、そ
の目的とするところは、点灯立上り特性の安定した照明
装置を提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a lighting device with stable lighting start-up characteristics.

（課題を解決するための手段） 光源と、該光源の、点灯初期の立上り特性を向上させる
ために設けられた近接導体とを有する照明装置において
、前記光源と前記近接導体とを一体に保持し、かつ移動
可能な光源位置調整部材を備えたことを特徴とする。(Means for Solving the Problems) In a lighting device having a light source and a proximate conductor provided for improving the rising characteristics of the light source at the initial stage of lighting, the light source and the proximal conductor are held together. , and a movable light source position adjustment member.

（作　用） 光源位置調整部材は光源と近接導体とを同時に保持した
状態で移動がなされる。(Function) The light source position adjustment member is moved while simultaneously holding the light source and the proximal conductor.

（実施例） 第１図及び第２区は、本発明に係る照明装置の第１の実
施例を示し、同図において１は原稿、２は原稿を保持す
る原稿ガラス、３は光源である蛍光灯、４は近接導体、
５は光源位置調整部材、６は光源位置調整部材５を枠体
１１に固定するためにビス、７，８は蛍光灯３の光束を
原稿ガラス２の下面に導くための下、上反射部材、９は
原稿面からの反射光を感光体１０に導（ための結像レン
ズである。(Embodiment) Figures 1 and 2 show a first embodiment of the illumination device according to the present invention, in which 1 is a document, 2 is a document glass that holds the document, and 3 is a fluorescent light source. light, 4 is a nearby conductor,
5 is a light source position adjustment member; 6 is a screw for fixing the light source position adjustment member 5 to the frame 11; 7 and 8 are lower and upper reflective members for guiding the luminous flux of the fluorescent lamp 3 to the lower surface of the original glass 2; Reference numeral 9 denotes an imaging lens for guiding reflected light from the surface of the document to the photoreceptor 10.

次に、上記構成において、光源である蛍光灯３は、光源
位置調整部材５のＵ字状の爪５ａに簡易固定されている
。また、近接導体４は、蛍光灯３とほぼ同等の長さであ
り、前記光源位置調整部材５の他の爪５ｃによって上下
方向に固定され、前記光源位置調整部材５の一部に設置
された壁５ｂにより左右方向が固定されるため、蛍光灯
３と近接導体４は、均一な隙間をもって照明装置内に設
置されている。Next, in the above configuration, the fluorescent lamp 3 that is the light source is simply fixed to the U-shaped claw 5a of the light source position adjustment member 5. Further, the proximity conductor 4 has approximately the same length as the fluorescent lamp 3, is fixed in the vertical direction by the other claw 5c of the light source position adjustment member 5, and is installed in a part of the light source position adjustment member 5. Since the wall 5b fixes the fluorescent lamp 3 and the adjacent conductor 4 in the horizontal direction, the fluorescent lamp 3 and the adjacent conductor 4 are installed in the lighting device with a uniform gap between them.

また、光源位置調整部材５は、前記蛍光灯３及び近接導
体４を同時に保持した状態で原稿ｌと平行な方向に移動
可能であり、前記感光体１０上の照度分布の状態に応じ
て前記光源位置調整部材５の奥１手前を移動させ、適切
な照度分布になった時点、でビス６で前記枠体１１に固
定することになる。Further, the light source position adjusting member 5 is movable in a direction parallel to the document l while holding the fluorescent lamp 3 and the proximity conductor 4 at the same time, and can move the light source according to the state of the illuminance distribution on the photoreceptor 10. The position adjusting member 5 is moved one distance from the rear, and when an appropriate illuminance distribution is obtained, it is fixed to the frame 11 with screws 6.

第３図は本発明に係る照明装置の第２の実施例を示し、
第１の実施例と同一の構成部分については、同一の番号
を付し、同一の作用・効果についてはその説明を省略す
る。４は近接導体の長手方向両端において蛍光灯３を囲
む形状４ａに曲げ、また他面は、ビス６で枠体１１に固
定できるように平坦な形状４ｂに折り曲げ、近接導体と
光源位置調整部材を一体化させたものである。FIG. 3 shows a second embodiment of the lighting device according to the present invention,
Components that are the same as those in the first embodiment are given the same numbers, and descriptions of the same functions and effects will be omitted. 4 is bent into a shape 4a that surrounds the fluorescent lamp 3 at both longitudinal ends of the proximity conductor, and the other side is bent into a flat shape 4b so that it can be fixed to the frame 11 with screws 6, and the proximity conductor and the light source position adjustment member are bent. It is integrated.

（発明の効果） 以上説明したように、蛍光灯と近接導体とを同時に保持
する光源位置調整部材を設けることにより製造コストを
上げずに、光源の点灯特性を安定させる効果がある。(Effects of the Invention) As described above, by providing the light source position adjustment member that simultaneously holds the fluorescent lamp and the adjacent conductor, there is an effect of stabilizing the lighting characteristics of the light source without increasing the manufacturing cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の第１の実施例に係る照明装置の概略断
面図、 第２図は同実施例に係る同装置の平面図、第３図は第２
の実施例に係る照明装置の主要部概略斜視図、 第４図は従来の照明装置の概略断面図である。 符　　号　　の　　説　　明 ３・・・蛍光灯〔光源）　　　４・・・近接導体５・・
・光源位置調整部材 第 図 第２図FIG. 1 is a schematic sectional view of a lighting device according to a first embodiment of the present invention, FIG. 2 is a plan view of the same device according to the same embodiment, and FIG.
FIG. 4 is a schematic sectional view of a conventional lighting device. Explanation of symbols 3...Fluorescent lamp (light source) 4...Proximity conductor 5...
・Light source position adjustment member Figure 2

Claims (1)

【特許請求の範囲】 光源と、 該光源の点灯初期の立上り特性を向上させるために設け
られた近接導体とを有する照明装置において、 前記光源と前記近接導体とを一体に保持し、かつ移動可
能な光源位置調整部材を備えたことを特徴とする照明装
置。[Scope of Claims] A lighting device having a light source and a proximate conductor provided to improve the initial start-up characteristics of the light source, wherein the light source and the proximal conductor are held integrally and are movable. 1. A lighting device comprising a light source position adjustment member.