JP2013143245A - Lighting system for image scanner - Google Patents

Lighting system for image scanner Download PDF

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JP2013143245A
JP2013143245A JP2012002604A JP2012002604A JP2013143245A JP 2013143245 A JP2013143245 A JP 2013143245A JP 2012002604 A JP2012002604 A JP 2012002604A JP 2012002604 A JP2012002604 A JP 2012002604A JP 2013143245 A JP2013143245 A JP 2013143245A
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light cover
light
image scanner
cover
illumination device
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Takakimi Kaneda
隆王 金田
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KYOUWA DEVICE KK
Kyowa Device Co Ltd
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KYOUWA DEVICE KK
Kyowa Device Co Ltd
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  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To realize with an LED light sources, a lighting system for an image scanner used as a light source for image scanner scanning.SOLUTION: The lighting system is provided with a strip-shaped metal illumination board 10 with a plurality of LED light sources L linearly arranged and mounted on its top surface at intervals, and a light cover 1 having translucency, incorporating the illumination board and with a light diffusion process applied. The illumination board is pinched between a bottom part 2 of the light cover and locking flanges 3, 3 set in protrusion on right and left inner walls above the bottom part 2, and also, a constant gap is set between top surfaces of the mounted LED light sources and a ceiling surface of the light cover.

Description

この発明は、画像スキャナーのスキャンニング用の光源として用いるための画像スキャナー用照明装置に関する。   The present invention relates to an illumination device for an image scanner for use as a light source for scanning of an image scanner.

画像スキャナーのスキャンニング用の光源としては、スキャンニングする巾に応じた全長を有する線状のものが要求され、そのため従来はこの種の光源として冷陰極管が使用されていた(特許文献1)。   As a light source for scanning of an image scanner, a linear light source having a total length corresponding to the width to be scanned is required. For this reason, a cold cathode tube has been conventionally used as this type of light source (Patent Document 1). .

特開2007−53716号公報JP 2007-53716 A 意匠登録第1347110号公報Design Registration No. 1347110

従来技術において、冷陰極管が用いられていた理由は一重にそのコンパクトさにあり、それにより画像スキャナーの小型化に寄与していた。   In the prior art, the reason why the cold cathode tube is used is because of its compactness, thereby contributing to the downsizing of the image scanner.

しかしながら、冷陰極管には温度への依存性があり、それが使用可能になるまでの立ち上がり時間を要するという問題があった。   However, there is a problem that a cold cathode tube has a dependency on temperature and requires a rise time until it can be used.

また、電源に関してもスキャナーのモータの駆動用のものとは別種のものが要求され、コスト面で不利であった。   In addition, a power supply different from that for driving the scanner motor is required, which is disadvantageous in terms of cost.

この発明は、以上の問題点を解決した画像スキャナー用照明装置を提供することを目的として創作されたものである。すなわち、この発明の画像スキャナー用照明装置は上面に複数のLED光源を間隔をおいて直線上に並べて実装した短冊状の金属製の照明基板と、上記照明基板を内装する光の拡散処理が施された透光性を有するライトカバーよりなり、上記照明基板はライトカバーの底部とその上の左右内壁に突設される係止鍔との間に挟持されるとともに、実装されたLED光源の上面とライトカバーの天井面との間には一定の間隙が開けられることを特徴とする。   The present invention was created for the purpose of providing an illumination device for an image scanner that solves the above problems. That is, the illumination device for an image scanner according to the present invention is a strip-shaped metal illumination substrate having a plurality of LED light sources arranged on a top surface and arranged in a straight line at intervals, and a light diffusion process for interior of the illumination substrate. And the lighting board is sandwiched between a bottom portion of the light cover and a locking rod projecting on the left and right inner walls thereon, and an upper surface of the mounted LED light source A certain gap is opened between the light cover and the ceiling surface of the light cover.

また、請求項3に記載の発明は、前記の画像スキャナー用照明装置において、ライトカバーの側壁に通気窓を間隔をおいて配したことを特徴とする。   The invention described in claim 3 is characterized in that, in the illumination device for an image scanner, ventilation windows are arranged at intervals on the side wall of the light cover.

また、請求項4に記載の発明は、前記の画像スキャナー用照明装置において、ライトカバーの底部に窓を間隔をおいて配したことを特徴とする。   According to a fourth aspect of the present invention, in the image scanner illumination device, a window is disposed at a bottom portion of the light cover at an interval.

また、請求項5に記載の発明は、前記の画像スキャナー用照明装置において、ライトカバーの底部に全長方向に渡って中央切り欠きを設けたことを特徴とする。   According to a fifth aspect of the present invention, in the image scanner illumination device, a central notch is provided at the bottom of the light cover in the entire length direction.

冷陰極管は線状の光源であるのに対し、LED光源は点状の光源である。この場合をLED光源を間隔をおいて直線上に並べて実装することにより線状の発光を得ることは公知である(例えば、特許文献2)。   A cold cathode tube is a linear light source, whereas an LED light source is a point light source. In this case, it is known to obtain linear light emission by mounting LED light sources on a straight line at intervals (for example, Patent Document 2).

しかしながら、並べて実装されたLED光源とLED光源の間には暗部が存するので、点在するLED光源により光のリップルが生じることとなり、通常の照明なら特に問題とならないが画像スキャナーのスキャンニング用の光源としてはこの点が問題となった。   However, since there is a dark part between the LED light sources mounted side by side, light ripples are generated by the scattered LED light sources, and this is not a problem for normal illumination, but for scanning of image scanners. This was a problem for the light source.

一方、画像スキャナーの小型化に寄与していた冷陰極管の代替品として使用することを想定した場合、冷陰極管と同じか、それ以下の寸法でなくてはならなかった。その場合、LED光源は高い照明輝度を得ようとすると高熱を発する性質があるので、その問題を解決しなくてはならなかった。   On the other hand, when it was assumed to be used as an alternative to a cold cathode tube that contributed to the miniaturization of an image scanner, it had to be the same size as or smaller than the cold cathode tube. In that case, the LED light source has a property of generating high heat when trying to obtain a high illumination luminance, so that the problem has to be solved.

この発明の画像スキャナー用照明装置においては第一にライトカバーを光の拡散処理が施されたものとし、同時に実装されたLED光源の上面とライトカバーの天井面との間に一定の間隙を設けることにより、点在するLED光源からの光をライトカバーを通過する過程で拡散させて光のリップルが生じることを防止している。   In the illumination device for an image scanner according to the present invention, the light cover is first subjected to a light diffusion process, and a certain gap is provided between the upper surface of the LED light source mounted at the same time and the ceiling surface of the light cover. Thus, the light from the scattered LED light sources is diffused in the process of passing through the light cover to prevent the light ripple.

また、上面に複数のLED光源を間隔をおいて直線上に並べて実装した短冊状の金属製の照明基板を、ライトカバーの底部とその上の左右内壁に突設される係止鍔との間に挟持することにより、ちょうど両端が開放されたライトカバーを照明基板が串差しすることになり、ライトカバー間を空気が流通して内部に溜まった熱を両端の隙間から排熱する他、ライトカバーの両端から露出した金属製の照明基板が内部に溜まった熱を外に逃がすラジエターの役目も果たし、照明輝度を高めた際の照明装置内の高温化を防止する。   In addition, a strip-shaped metal lighting board having a plurality of LED light sources arranged and mounted on the upper surface in a straight line is spaced between the bottom of the light cover and the locking rods protruding from the left and right inner walls. By sandwiching the light cover, the lighting board will skew the light cover with both ends open. In addition to exhausting the heat accumulated inside the light cover through the gap between the light covers, The metal lighting board exposed from both ends of the cover also serves as a radiator that releases the heat accumulated inside, and prevents the temperature inside the lighting device from increasing when the illumination brightness is increased.

また、両端が開放されたライトカバーを照明基板が串差しする構造なので、ライトカバーに開閉部分が不要となり小型化に寄与する他、ライトカバーを押し出し成型により得ることができコスト面でも有利となる。   In addition, since the lighting board is inserted into the light cover with both ends open, the light cover does not require an opening / closing part, contributing to downsizing, and the light cover can be obtained by extrusion molding, which is advantageous in terms of cost. .

また、LED光源とすることにより、スキャナーのモータの駆動用のものと電源を共用できコスト面で有利となる。   Further, by using the LED light source, the power source can be shared with that for driving the scanner motor, which is advantageous in terms of cost.

この発明の画像スキャナー用照明装置の分解斜視図。The disassembled perspective view of the illuminating device for image scanners of this invention. この発明の画像スキャナー用照明装置の平面図。The top view of the illuminating device for image scanners of this invention. 同上、底面図。Same as above, bottom view. 同上、側面図。Same as above, side view. 同上、断面図。FIG. 同上、断面図。FIG. この発明の画像スキャナー用照明装置のランプカバーの断面図。Sectional drawing of the lamp cover of the illuminating device for image scanners of this invention. この発明の画像スキャナー用照明装置のランプカバーの異なる実施例の斜視図。The perspective view of the Example from which the lamp cover of the illuminating device for image scanners of this invention differs. この発明の画像スキャナー用照明装置のランプカバーの異なる実施例の底面図。The bottom view of the Example from which the lamp cover of the illuminating device for image scanners of this invention differs. この発明の画像スキャナー用照明装置のランプカバーの異なる実施例の斜視図。The perspective view of the Example from which the lamp cover of the illuminating device for image scanners of this invention differs.

以下、この発明の画像スキャナー用照明装置の具体的実施例を添付図面に基づいて説明する。この発明の画像スキャナー用照明装置は照明基板10と、上記照明基板を内装するライトカバー1より構成される。照明基板10は上面に複数のLED光源Lを間隔をおいて直線上に並べて実装した短冊状の金属板からなり、ここではアルミ板を採用している。   Hereinafter, specific embodiments of the illumination device for an image scanner according to the present invention will be described with reference to the accompanying drawings. The illumination device for an image scanner according to the present invention includes an illumination substrate 10 and a light cover 1 that houses the illumination substrate. The illumination board 10 is made of a strip-shaped metal plate on which a plurality of LED light sources L are arranged in a straight line at intervals, and an aluminum plate is used here.

前記、照明基板10が内装されるライトカバー1はライトカバーの底部2とその上の左右内壁に突設される係止鍔3、3との間に照明基板4を挟持するものであり、ちょうど両端が開放されたライトカバーを照明基板が串差しすることになる。ライトカバーの両端から露出した照明基板の両端には照明装置をスキャナーに取り付けるための止めねじのためのねじ孔11、11が穿設される。また、露出した照明基板の一端にはLED光源Lへの通電のための接続端子コネクタCが実装される。なお、前記係止鍔3、3はここではライトカバー1の全長方向に連続する直線状のものを例示しているが、複数に分割してもよいことは勿論である。   The light cover 1 in which the illumination board 10 is housed sandwiches the illumination board 4 between the bottom part 2 of the light cover and the locking rods 3 and 3 projecting from the left and right inner walls thereon, The lighting board will skew the light cover open at both ends. Screw holes 11 and 11 for setting screws for attaching the illumination device to the scanner are formed at both ends of the illumination board exposed from both ends of the light cover. A connection terminal connector C for energizing the LED light source L is mounted on one end of the exposed illumination board. In addition, although the said locking rods 3 and 3 have illustrated the linear thing continuous in the full length direction of the light cover 1 here, of course, you may divide | segment into plurality.

前記ライトカバー1は光の拡散処理が施された透光性を有するものであり、合成樹脂による押し出し成型により得られる。この場合、合成樹脂としては剛性、耐熱性、難燃性の見地からポリカーボネートが最適である。   The light cover 1 has a light-transmitting property subjected to a light diffusion treatment, and is obtained by extrusion molding with a synthetic resin. In this case, polycarbonate is most suitable as a synthetic resin from the viewpoint of rigidity, heat resistance, and flame retardancy.

図6は照明装置の断面を示す図であるが、実装されたLED光源Lの上面とライトカバー1の天井面4との間には一定の間隙が開けられることにより、ライトカバーによる光の拡散作用を高め、点在するLED光源により光のリップルが生じることを防止している。   FIG. 6 is a diagram showing a cross section of the lighting device. A certain gap is opened between the upper surface of the mounted LED light source L and the ceiling surface 4 of the light cover 1, thereby diffusing light by the light cover. The effect is enhanced, and light ripples are prevented from being generated by the scattered LED light sources.

図8はライトカバー1の異なる実施例を示す図であり、ここではライトカバー1の側壁に通気窓M1を間隔をおいて配することによりライトカバーからの排熱を図っている。   FIG. 8 is a view showing a different embodiment of the light cover 1, and here, exhaust air from the light cover is intended by arranging ventilation windows M <b> 1 on the side walls of the light cover 1 at intervals.

図9はライトカバー1の異なる実施例を示す図であり、ここではライトカバー1の底部2に窓を間隔をおいて窓M2を配することにより、金属製の照明基板が内部に溜まった熱を外に逃がすラジエターの役目を助長することを図っている。   FIG. 9 is a diagram showing a different embodiment of the light cover 1. Here, by arranging a window M 2 at a distance from the bottom 2 of the light cover 1, the heat accumulated in the metal illumination board is stored inside. We aim to promote the role of a radiator to escape the outside.

図10はライトカバー1の異なる実施例を示す図であり、ここではライトカバー1の底部2に全長方向に渡って中央切り欠きをKを設けることにより、金属製の照明基板が内部に溜まった熱を外に逃がすラジエターの役目を助長することを図っている。   FIG. 10 is a view showing a different embodiment of the light cover 1, in which a metal illumination board is accumulated inside by providing a K at the bottom 2 of the light cover 1 along the entire length direction. It is intended to promote the role of a radiator that escapes heat.

1 ライトカバー
10 照明基板
L LED光源
1 Light cover 10 Lighting board
L LED light source

前記、照明基板10が内装されるライトカバー1はライトカバーの底部2とその上の左右内壁に突設される係止鍔3、3との間に照明基板10を挟持するものであり、ちょうど両端が開放されたライトカバーを照明基板が串差しすることになる。ライトカバーの両端から露出した照明基板の両端には照明装置をスキャナーに取り付けるための止めねじのためのねじ孔11、11が穿設される。また、露出した照明基板の一端にはLED光源Lへの通電のための接続端子コネクタCが実装される。なお、前記係止鍔3、3はここではライトカバー1の全長方向に連続する直線状のものを例示しているが、複数に分割してもよいことは勿論である。 The light cover 1 in which the illumination board 10 is housed sandwiches the illumination board 10 between the bottom portion 2 of the light cover and the locking rods 3 and 3 protruding on the left and right inner walls. The lighting board will skew the light cover open at both ends. Screw holes 11 and 11 for setting screws for attaching the illumination device to the scanner are formed at both ends of the illumination board exposed from both ends of the light cover. A connection terminal connector C for energizing the LED light source L is mounted on one end of the exposed illumination board. In addition, although the said locking rods 3 and 3 have illustrated the linear thing continuous in the full length direction of the light cover 1 here, of course, you may divide | segment into plurality.

Claims (5)

上面に複数のLED光源を間隔をおいて直線上に並べて実装した短冊状の金属製の照明基板と、上記照明基板を内装する光の拡散処理が施された透光性を有するライトカバーよりなり、上記照明基板はライトカバーの底部とその上の左右内壁に突設される係止鍔との間に挟持されるとともに、実装されたLED光源の上面とライトカバーの天井面との間には一定の間隙が開けられることを特徴とする画像スキャナー用照明装置。   It consists of a strip-shaped metal lighting board on which a plurality of LED light sources are mounted in a straight line at intervals on the upper surface, and a light cover with translucency that has been subjected to a light diffusing process that interiors the lighting board. The lighting board is sandwiched between the bottom portion of the light cover and a locking rod protruding from the left and right inner walls, and between the upper surface of the mounted LED light source and the ceiling surface of the light cover. An illumination device for an image scanner, wherein a certain gap is opened. ライトカバーはポリカーボネートを押し出し成型して得られる請求項1記載の画像スキャナー用照明装置。   The illumination device for an image scanner according to claim 1, wherein the light cover is obtained by extruding polycarbonate. ライトカバーの側壁には通気窓が間隔をおいて配される請求項1または2記載の画像スキャナー用照明装置。   The illumination device for an image scanner according to claim 1, wherein ventilation windows are arranged at intervals on a side wall of the light cover. ライトカバーの底部には窓が間隔をおいて配される請求項1から3のいずれかに記載の画像スキャナー用照明装置。   The illumination device for an image scanner according to any one of claims 1 to 3, wherein windows are arranged at intervals on a bottom portion of the light cover. ライトカバーの底部は全長方向に渡って中央切り欠きが設けられる請求項1から4のいずれかに記載の画像スキャナー用照明装置。   The illumination device for an image scanner according to any one of claims 1 to 4, wherein a bottom portion of the light cover is provided with a central cutout in the entire length direction.
JP2012002604A 2012-01-10 2012-01-10 Lighting system for image scanner Pending JP2013143245A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103639927A (en) * 2013-11-22 2014-03-19 上海亚明照明有限公司 Fixture for assembling LED (light-emitting diode) lamp and method for assembling LED lamp by fixture
JP2015070285A (en) * 2013-09-26 2015-04-13 株式会社Pfu Light source unit for image reading device and image reading device with the light source unit
JP2019016440A (en) * 2017-07-03 2019-01-31 株式会社ナノテコ Light emitting body

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015070285A (en) * 2013-09-26 2015-04-13 株式会社Pfu Light source unit for image reading device and image reading device with the light source unit
CN104519230A (en) * 2013-09-26 2015-04-15 株式会社Pfu Light source unit of image-reading apparatus and image-reading apparatus with light source unit
CN104519230B (en) * 2013-09-26 2018-01-02 株式会社Pfu The light source cell of image read-out, the image read-out with the light source cell
CN103639927A (en) * 2013-11-22 2014-03-19 上海亚明照明有限公司 Fixture for assembling LED (light-emitting diode) lamp and method for assembling LED lamp by fixture
JP2019016440A (en) * 2017-07-03 2019-01-31 株式会社ナノテコ Light emitting body
JP7103762B2 (en) 2017-07-03 2022-07-20 株式会社ナノテコ Luminous body

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