Source: https://patents.google.com/patent/JPH05162386A/en
Timestamp: 2019-12-15 01:15:55
Document Index: 579439081

Matched Legal Cases: ['art 12', 'art 12', 'art 17', 'art 12', 'art 17', 'art 12']

JPH05162386A - Led array head - Google Patents
Led array head
JPH05162386A
JPH05162386A JP35319891A JP35319891A JPH05162386A JP H05162386 A JPH05162386 A JP H05162386A JP 35319891 A JP35319891 A JP 35319891A JP 35319891 A JP35319891 A JP 35319891A JP H05162386 A JPH05162386 A JP H05162386A
JP35319891A
Ryosaku Kanzawa
亮策 神沢
1991-12-17 Application filed by Hitachi Cable Ltd, 日立電線株式会社 filed Critical Hitachi Cable Ltd
1991-12-17 Priority to JP35319891A priority Critical patent/JPH05162386A/en
1993-06-29 Publication of JPH05162386A publication Critical patent/JPH05162386A/en
PURPOSE:To ensure that an LED chip and a condensing lens are correctly positioned on an LED array head when assembled. CONSTITUTION:A stepped part 12 for receiving the rear of a peripheral part of a substrate 1 on which an LED array chip is mounted, is formed on the top surface of a base member, and an area outside the stepped part 12 is used as a seat 13 for the installation of a holder 4 for a condensing lens. In addition, the height H1 of the seat 13 is less than the thickness T1 of the substrate 1, and part of the bottom surface of a holder 4 is so designed as to come in contact with the front of the substrate 1, when the holder 4 is installed to the base member 2 with a screw 15. Further, a recessed part 17 for storing a busbar 9 provided on the rear of the substrate 1 inside the stepped part 12, and the depth H2 of this recessed part 17 is larger than the thickness T2 of the busbar 9, so that the busbar 9 does not come in contact with the top surface of the base member 2, when the substrate 1 is placed in the stepped part 12.
【産業上の利用分野】本発明は光学式プリンタの印字または消去用の光源等として用いるＬＥＤアレイヘッドに関する。 The present invention relates to a LED array head used as a light source or the like for printing or erasing of an optical printer.
【従来の技術】ＬＥＤ（Light Emitting Diode)やレーザ光を利用した光学式プリンタが広く普及しつつある。 Optical printers are becoming widely utilizing the Related Art LED (Light Emitting Diode) or a laser beam.
この光学式プリンタのプリントヘッドとしてＬＥＤアレイを用いたものは、ＬＥＤが固体素子であることから信頼性が高い。 Those using LED array as a print head of the optical printer, high reliability since LED is a solid element.
【０００３】図３は一般的なＬＥＤアレイヘッドの断面図であり、ＬＥＤアレイヘッドはヒートシンクを兼ねるベース部材２１の上面に、ＬＥＤアレイチップ２２及びドライブＩＣ２３を搭載した基板２４を固定し、またベース部材２１に集光レンズアレイ２５を保持したホルダ２６を取付けた構造になっている。 [0003] Figure 3 is a sectional view of a typical LED array head, LED array head on the upper surface of the base member 21 also serving as a heat sink to fix the substrate 24 mounted with the LED array chip 22 and the drive IC 23, also a base It has become a mounting structure holder 26 which holds the condenser lens array 25 to the member 21.
【０００４】そして、高精度の印刷を可能にするにはＬ [0004] Then, to enable the printing of high-precision L
ＥＤアレイを構成する各チップからの光の焦点と感光体表面とが正確に一致するすることが必要である。 It is necessary to have the focal point and the surface of the photoreceptor of the light exactly matches from each chip constituting the ED array. このため実開平２−１２８４５号公報にあっては、ベース部材を貫通するネジにてヘッド組立て後に集光レンズアレイの位置を微調整するようにし、また特開昭６２−１０１ Therefore In the actual Hei 2-12845 JP, so as to finely adjust the position of the condenser lens array by a screw extending through the base member after the head assembly, also JP 62-101
０８７号にあっては、ベース部材に基板の位置決め用突起を、ホルダに集光レンズアレイの位置決め用突起を設けている。 In the No. 087, the positioning projection of the substrate on the base member is provided with a positioning projection of the condenser lens array holder.
【発明が解決しようとする課題】実開平２−１２８４５ THE INVENTION Problems to be Solved] real-Open No. 2-12845
号のようにヘッド組立て後に個々の集光レンズの微調整を行なうのは極めて面倒であり、調整後にも狂いが生じやすい。 Very cumbersome, deviation is likely to occur even after adjusting for a fine adjustment of the individual focusing lens after head assembly as No.. また特開昭６２−１０１０８７号のように位置決め用の突起を設けても、基板と集光レンズアレイとはベース部材を介して間接的に位置決めされるため、焦点がずれることがあり、特に基板にＬＥＤアレイチップ及びドライブＩＣに通電するコモン電極としてブスバーを設けている場合には、このブスバーの凹凸、湾曲及びブスバー接着に用いる半田の厚みが個々のヘッドによって異なるため、組立て後の微調整が不可欠である。 Also provided with projections for positioning as JP 62-101087, since the substrate and the condenser lens array is indirectly positioned through the base member, sometimes out of focus, particularly a substrate If you are provided bus bar as a common electrode for energizing the LED array chips and driver IC, the irregularities of the bus bars, because it depends solder thickness of each head to be used for bending and bus bar bonding, fine adjustment after assembly It is essential.
【課題を解決するための手段】上記課題を解決すべく本発明は、ＬＥＤアレイチップを搭載した基板をベース部材に固定し、このベース部材に集光レンズアレイを保持するホルダを取付けたＬＥＤアレイヘッドにおいて、前記基板の裏面にコモン電極となるブスバーを設け、前記ベース部材上面にはブスバーの厚みよりも深いブスバー収納凹部を形成し、ホルダの底面の一部を基板の上面に当接した状態でベース部材に取付けた。 SUMMARY OF THE INVENTION The present invention to solve the above problems is, LED array mounted to the substrate the LED array chip fixed to the base member, attached to the holder for holding the condensing lens array on the base member state in the head, the bus bar serving as a common electrode on the back surface of the substrate provided on the base member upper surface a deep busbar accommodating recess than the thickness of the bus bar, which abuts a portion of the bottom surface of the holder on the upper surface of the substrate in was attached to the base member.
【作用】集光レンズアレイを保持するホルダの底面を基板の上面に当接した状態でベース部材に取付けているので、基板表面が集光レンズアレイの基準面となり、集光レンズアレイとＬＥＤアレイチップとの間隔を正確に定めることができる。 Since the upper surface of the substrate to the bottom surface of the holder holding the [action] condenser lens array is attached to the base member while abutting the substrate surface is the reference surface of the condenser lens array, the condenser lens array and the LED array the distance between the chip can be accurately determined.
【実施例】以下に本発明の実施例を添付図面に基づいて説明する。 EXAMPLES be described with reference to the embodiment accompanying drawings of the invention are described below. ここで、図１は本発明に係るＬＥＤアレイヘッドの断面図、図２は図１の要部拡大図であり、ＬＥＤ Here, FIG. 1 is a sectional view of the LED array head according to the present invention, FIG. 2 is an enlarged view of FIG. 1, LED
アレイヘッドはプリント配線基板１、この基板１を固定するベース部材２、集光レンズアレイ３及びこの集光レンズアレイ３を保持するホルダ４からなる。 The array head printed wiring board 1, the base member 2 for fixing the substrate 1, consists of a holder 4 for holding the condenser lens array 3 and the condenser lens array 3.
【０００９】基板１は樹脂やセラミックからなり、その表面には紙面垂直方向に多数のＬＥＤチップを連ねてなるＬＥＤアレイ５と、このＬＥＤアレイ５と金線６にて接続されるドライバＩＣ７と、このドライバＩＣ７と金線６にて接続されるコントロール用配線８が固着されている。 [0009] substrate 1 is made of resin or ceramic, an LED array 5 comprising been chosen number of LED chips in the direction perpendicular to the paper surface on the surface, a driver IC7 to be connected by the LED array 5 and the gold wires 6, control wiring 8 are connected by the driver IC7 gold wire 6 is fixed.
【００１０】また、基板１の裏面には前記ＬＥＤアレイ５及びドライバＩＣ７に給電するコモン電極としてのブスバー９を半田により接着し、このブスバー９とＬＥＤ Further, the back surface of the substrate 1 to bond the bus bar 9 as a common electrode for supplying power to the LED array 5 and the driver IC7 by soldering, the bus bars 9 and LED
アレイ５等を基板１に穿設したスルーホール１０にて導通している。 The array 5 or the like are conductive at the through hole 10 bored in the substrate 1.
【００１１】一方、ベース部材２はヒートシンクを兼ねるようにアルミニウム材を押出し成形して多数のフィン１１を形成している。 Meanwhile, the base member 2 forms a plurality of fins 11 of aluminum material was extruded to serve as a heat sink. そしてベース部材２の上面には基板１の周縁部裏面を載置する段部１２を形成し、この段部１２よりも外側をホルダ４の取付け座１３とし、この取付け座１３にネジ孔１４を刻設している。 And on the upper surface of the base member 2 to form a stepped portion 12 for mounting the periphery backside of the substrate 1, the outer side than the stepped portion 12 and the mounting seat 13 of the holder 4, a screw hole 14 in the mounting seat 13 It is engraved.
【００１２】ここで、取付け座１３の高さＨ１は基板１ [0012] Here, the height H1 of the mounting seat 13 is the substrate 1
の厚みＴ１よりも小さく（Ｈ１＜Ｔ１）設定し、ビス１ Thickness smaller than T1 (H1 <T1) is set, bis 1
５によりホルダ４をベース部材２に取付ける際に、ホルダ４の底面の一部が基板１の表面に当接するようにしている。 5 when attaching the holder 4 to the base member 2, a part of the bottom surface of the holder 4 is to be in contact with the surface of the substrate 1. このようにすることで、ホルダ４即ち集光レンズアレイ３が基板１の表面を基準として位置決めされる。 In this way, the holder 4 i.e. condenser lens array 3 is positioned relative to the surface of the substrate 1.
尚、ホルダ４をベース部材２に取付けるにあたっては、 Incidentally, when attaching the holder 4 to the base member 2,
取付け座１３上面とホルダ４の底面との間にシム１６を介在させて緩みを防止する。 The shim 16 is interposed between the bottom surface of the mounting seat 13 top and the holder 4 to prevent loosening. また、ビス１５を用いずにバネピンや接着剤にてホルダ４をベース部材２に取付けてもよい。 Further, the holder 4 may be attached to the base member 2 by a spring pin or an adhesive without using screws 15.
【００１３】また前記段部１２の内側には基板１裏面に設けたブスバー９を収納する凹部１７を形成している。 Further inside the stepped portion 12 forms a recess 17 for accommodating the bus bars 9 provided on the rear surface of the substrate 1.
この凹部１７の深さＨ２はブスバー９の厚みＴ２よりも大きく（Ｈ２＞Ｔ２）設定し、段部１２に基板１を載置した際に、ブスバー９がベース部材２上面に接触しないようにしている。 The depth H2 of the concave portion 17 is larger than the thickness T2 of the bus bar 9 (H2> T2) is set, when placing the substrate 1 to the stepped portion 12, the bus bar 9 is to avoid contact with the base member 2 the upper surface there. そして凹部１７内にはシリコーン１８ And in the recess 17 silicone 18
を注入して放熱効果を高めている。 Injection to have improved heat dissipation effect.
集光レンズホルダの底面を基板の上面に当接した状態でベース部材に取付け、しかも厚みが部分的に不均一となりやすいブスバーを基板の裏面に形成したので、平滑性と厚み精度に優れた基板表面を集光レンズアレイの基準面となり、集光レンズアレイとＬＥＤアレイチップとの間隔を正確に定めることができ、組立て後の調整が不要となる。 Attached to the base member to the bottom surface of the condensing lens holder in contact with the upper surface of the substrate, and since the bus bars tends to be thick partially unevenly formed on the back surface of the substrate, the substrate having excellent smoothness and thickness precision surface as the reference surface of the condenser lens array, the distance between the condenser lens array and the LED array chip can be determined accurately, it becomes unnecessary adjustment after assembly.
【図１】本発明に係るＬＥＤアレイヘッドの断面図 Sectional view of the LED array head according to the invention, FIG
【図３】従来のＬＥＤアレイヘッドの断面図 3 is a cross-sectional view of a conventional LED array head
１…基板、２…ベース部材、３…集光レンズアレイ、４ 1 ... substrate, 2 ... base member, 3 ... condenser lens array, 4
…ホルダ、５…ＬＥＤアレイ、６…ドライブＩＣ、９… ... holder, 5 ... LED array, 6 ... drive IC, 9 ...
ブスバー、１２…段部、１７…凹部。 Bus bar, 12 ... stepped portion, 17 ... recess.
【請求項１】 ＬＥＤアレイチップを搭載した基板をベース部材に固定し、このベース部材に集光レンズアレイを保持するホルダを取付けたＬＥＤアレイヘッドにおいて、前記基板は裏面にブスバーを設け、前記ベース部材上面にはブスバーの厚みよりも深いブスバー収納凹部を形成し、また前記ホルダの底面の一部は基板の上面に当接した状態でベース部材に取付けられていることを特徴とするＬＥＤアレイヘッド。 1. A substrate mounted with LED array chip fixed to the base member, the LED array head fitted with a holder for holding the condensing lens array on the base member, wherein the substrate is provided with a bus bar on the rear surface, said base LED array head in member top surface a deep busbar accommodating recess than the thickness of the bus bars, also part of the bottom surface of the holder is characterized in that mounted on the base member in a state of contact with the upper surface of the substrate .
JP35319891A 1991-12-17 1991-12-17 Led array head Withdrawn JPH05162386A (en)
JP35319891A JPH05162386A (en) 1991-12-17 1991-12-17 Led array head
JPH05162386A true JPH05162386A (en) 1993-06-29
ID=18429227
JP35319891A Withdrawn JPH05162386A (en) 1991-12-17 1991-12-17 Led array head
JP (1) JPH05162386A (en)
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