JP4710446B2 - lighting equipment - Google Patents

lighting equipment Download PDF

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Publication number
JP4710446B2
JP4710446B2 JP2005199292A JP2005199292A JP4710446B2 JP 4710446 B2 JP4710446 B2 JP 4710446B2 JP 2005199292 A JP2005199292 A JP 2005199292A JP 2005199292 A JP2005199292 A JP 2005199292A JP 4710446 B2 JP4710446 B2 JP 4710446B2
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Japan
Prior art keywords
wiring board
printed wiring
wall portion
front wall
rib
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JP2007018879A (en
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博司 青木
美紀 若林
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Panasonic Corp
Panasonic Electric Works Co Ltd
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Panasonic Corp
Matsushita Electric Works Ltd
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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

本発明は、光源として発光ダイオードを用いる照明器具に関し、特に発光ダイオードが実装されたプリント配線板を透光性を有する樹脂材料製のカバー内に収納するようにした照明器具に関するものである。   The present invention relates to a lighting fixture using a light emitting diode as a light source, and more particularly to a lighting fixture in which a printed wiring board on which a light emitting diode is mounted is housed in a cover made of a resin material having translucency.

従来、蛍光灯などの放電灯や白熱灯を光源とする照明器具が一般的であったが、近年、発光ダイオードの発光色の白色化並びに高輝度化に伴い、発光ダイオードを光源として用いる照明器具が提供されている（例えば、特許文献１参照）。   Conventionally, lighting fixtures using a discharge lamp such as a fluorescent lamp or an incandescent lamp as a light source have been generally used. Is provided (see, for example, Patent Document 1).

この種の照明器具においては、光源である発光ダイオードをプリント配線板に実装するとともに当該プリント配線板を透明な樹脂成型品からなるカバーで覆うように構成されている。かかるカバーは、発光ダイオードが実装されているプリント配線板の表面と対向する前壁部と、前壁部の周囲を囲む周壁部と、前壁部並びに周壁部に跨って突設されプリント配線板の表面に当接する１乃至複数の第１のリブと、周壁部より突設されてプリント配線板の裏面に当接する１乃至複数の第２のリブとを具備している。つまり、第１のリブと第２のリブをプリント配線板の表裏両面に当接させることによって、プリント配線板の表面と前壁部との間にスペースを設けた状態でカバー内にプリント配線板を収納することができるものである。
特表２００３−５０５８３５号公報 In this type of lighting fixture, a light-emitting diode as a light source is mounted on a printed wiring board, and the printed wiring board is covered with a cover made of a transparent resin molded product. The cover includes a front wall portion facing the surface of the printed wiring board on which the light emitting diode is mounted, a peripheral wall portion surrounding the front wall portion, and a front printed wiring board protruding from the front wall portion and the peripheral wall portion. And one or more first ribs that contact the surface of the printed circuit board, and one or more second ribs that protrude from the peripheral wall and contact the back surface of the printed wiring board. That is, the printed wiring board in the cover with a space provided between the front surface and the front wall of the printed wiring board by bringing the first rib and the second rib into contact with both front and back surfaces of the printed wiring board. Can be stored.
Special table 2003-505835 gazette

ところで上記従来例においては、第２のリブがプリント配線板に実装されている発光ダイオードの近傍に設けられていたため、カバーの前壁部における発光ダイオードの近傍にひけやウェルドマークなどの成型不良が発生した場合に発光ダイオードの光の配光が乱れるといった不具合が生じる虞があった。つまり、第２のリブは前壁部との間に隙間を空けて周壁部より突設されているため、成型時に前壁部との間にスライドコアを配置する必要があり、スライドコアを使用することで前壁部にひけやウェルドマークなどの成型不良が発生しやすくなっているのである。   In the above conventional example, since the second rib is provided in the vicinity of the light emitting diode mounted on the printed wiring board, molding defects such as sink marks and weld marks are formed in the vicinity of the light emitting diode on the front wall portion of the cover. When this occurs, there is a possibility that the light distribution of the light emitting diode is disturbed. In other words, since the second rib protrudes from the peripheral wall with a gap between it and the front wall, it is necessary to place the slide core between the front wall and the slide core during molding. As a result, molding defects such as sink marks and weld marks are likely to occur on the front wall.

本発明は上記事情に鑑みて為されたものであり、その目的は、カバーに成型不良が発生しても配光の乱れなどの不具合が生じ難い照明器具を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a luminaire that is unlikely to cause problems such as a disturbance of light distribution even if a molding failure occurs in a cover.

請求項１の発明は、上記目的を達成するために、光源として発光ダイオードを用いる照明器具であって、複数個の発光ダイオードと、４つの辺の長さがほぼ等しい四辺形状に形成されて当該発光ダイオードが表面の周縁近傍に実装されるプリント配線板と、透光性を有する合成樹脂材料によって一面が開口する箱状に形成され内部にプリント配線板が収納されるカバーと、当該カバーが取り付けられる基台とを備え、カバーは、発光ダイオードが実装されているプリント配線板の表面と対向する前壁部と、前壁部の周囲を囲む周壁部と、前壁部並びに周壁部に跨って突設されプリント配線板の表面に当接する１乃至複数の第１のリブと、周壁部より突設されてプリント配線板の裏面に当接する１乃至複数の第２のリブとを具備し、第２のリブが、プリント配線板の発光ダイオードが実装されている位置から離れた位置でプリント配線板の裏面に当接し、前記プリント配線板は、前記４つの辺にそれぞれ複数の切り欠きが設けられるとともに、内側に複数の貫通孔が設けられていることを特徴とする。 In order to achieve the above object, the invention of claim 1 is a luminaire using a light emitting diode as a light source, and is formed into a plurality of light emitting diodes and a quadrilateral shape in which the lengths of four sides are substantially equal. A printed wiring board on which light emitting diodes are mounted near the periphery of the surface, a cover formed in a box shape with one surface opened by a synthetic resin material having translucency, and the printed wiring board stored therein, and the cover attached And a cover straddling the front wall portion facing the surface of the printed wiring board on which the light emitting diode is mounted, a peripheral wall portion surrounding the front wall portion, and the front wall portion and the peripheral wall portion. One or more first ribs protruding and contacting the surface of the printed wiring board; and one or more second ribs protruding from the peripheral wall and contacting the back surface of the printed wiring board; 2 ribs Together but come into contact with the back surface of the printed wiring board at a location remote from the location where the light emitting diode printed circuit board is mounted, said printed circuit board, said four sides to plurality of cut-outs each of which is provided, and a plurality of through holes are provided on the inner side.

請求項１の発明によれば、プリント配線板の発光ダイオードが実装されている位置から離れた位置で第２のリブがプリント配線板の裏面に当接するので、前壁部における第２のリブと対向する部位に成型不良が発生しても配光の乱れなどの不具合が生じ難くなるという効果がある。しかも、プリント配線板は、４つの辺にそれぞれ複数の切り欠きが設けられるとともに、内側に複数の貫通孔が設けられているので、カバー内に封止材料を充填する際にプリント配線板とカバーの前壁部との間の空気を切り欠きや貫通孔から抜くことで気泡が残るのを防ぐことができる。 According to the first aspect of the present invention, the second rib contacts the back surface of the printed wiring board at a position away from the position where the light emitting diode of the printed wiring board is mounted. Even if molding defects occur in the opposing parts, there is an effect that troubles such as disturbance of light distribution hardly occur. Moreover, since the printed wiring board has a plurality of notches on each of the four sides and a plurality of through holes on the inside, the printed wiring board and the cover are filled when the sealing material is filled in the cover. It is possible to prevent air bubbles from remaining by cutting out the air between the front wall portion and the through-hole.

以下、図１〜図４を参照して本発明の実施形態を詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

本実施形態は、図１に示すように矩形平板状の取付台１と、取付台１の前面に取り付けられる４つの光源ユニット２とで構成される。取付台１は、図４に示すように矩形の金属板からなり、四隅には平面視略円形の突部１ａが背面側へそれぞれ突設され、各辺の中央と中心との間には平面視略短冊形の突台部１ｂが背面側へそれぞれ突設されている。また突台部１ｂの底面には取付台１を壁面や床面などの施工面に固定するための固定ねじ（図示せず）を挿通するねじ挿通孔１ｃが貫設されている。ここで、４つの突台部１ｂは金属板を絞り加工することで形成されるのであるが、絞り加工の際に金属板に作用する応力によって金属板全体に反りが発生してしまうので、絞り加工の前に各突台部１ｂの底面に相当する部位に突台部１ｂの長手方向に沿った溝１ｄを貫設しておくことが望ましい。すなわち、絞り加工時に金属板に作用する応力が溝１ｄによって緩和されるために金属板の反りを防ぐことができるのである。   As shown in FIG. 1, the present embodiment includes a rectangular flat plate mounting base 1 and four light source units 2 mounted on the front surface of the mounting base 1. As shown in FIG. 4, the mounting base 1 is made of a rectangular metal plate, and projecting portions 1 a having a substantially circular shape in plan view are provided on the four corners so as to project to the back side. A substantially strip-shaped projecting portion 1b is provided so as to project to the back side. In addition, a screw insertion hole 1c through which a fixing screw (not shown) for fixing the mounting base 1 to a construction surface such as a wall surface or a floor surface is inserted is provided in the bottom surface of the projecting portion 1b. Here, the four protrusions 1b are formed by drawing a metal plate. However, since the entire metal plate is warped by the stress acting on the metal plate during drawing, Before processing, it is desirable that a groove 1d extending in the longitudinal direction of the projecting portion 1b is provided in a portion corresponding to the bottom surface of each projecting portion 1b. That is, since the stress acting on the metal plate during the drawing process is relieved by the grooves 1d, the metal plate can be prevented from warping.

光源ユニット２は、複数個（図示例では９個）の発光ダイオード３が実装されたプリント配線板４と、プリント配線板４が内部に収納されるカバー５と、プリント配線板４から引き出されたリード線６とで構成される。   The light source unit 2 is drawn out of the printed wiring board 4 on which a plurality of (9 in the illustrated example) light emitting diodes 3 are mounted, a cover 5 in which the printed wiring board 4 is housed, and the printed wiring board 4. It is comprised with the lead wire 6. FIG.

プリント配線板４は略矩形平板状であって、図３（ａ）に示すように四隅と中心と各辺の中央とに各々１個ずつで合計９個の発光ダイオード３が表面に実装され、図３（ｂ）に示すように商用電源を整流平滑して発光ダイオード３に直流電圧を印加するための回路素子（トランジスタや抵抗など）が裏面に実装されている。また商用電源と接続するためのリード線６や送り配線用のリード線６がプリント配線板４から引き出されており、リード線６の先端には他の光源ユニット２のリード線６と接続するためのコネクタ８，９が取り付けられている（図１参照）。なお、プリント配線板４には多数の切り欠き４ａが周縁に設けられるとともに平面視略円形の複数の貫通孔４ｂが全体に設けられており、後述するように封止材料（シリコン）を充填する際にプリント配線板４とカバー５の前壁部５０との間の空気を切り欠き４ａや貫通孔４ｂから抜くことで気泡が残るのを防いでいる。   The printed wiring board 4 has a substantially rectangular flat plate shape, and as shown in FIG. 3A, nine light emitting diodes 3 are mounted on the surface, one at each of the four corners, the center, and the center of each side. As shown in FIG. 3B, circuit elements (transistors, resistors, etc.) for rectifying and smoothing the commercial power source and applying a DC voltage to the light emitting diode 3 are mounted on the back surface. In addition, a lead wire 6 for connection with a commercial power source and a lead wire 6 for feed wiring are drawn out from the printed wiring board 4 and are connected to the lead wire 6 of another light source unit 2 at the tip of the lead wire 6. Connectors 8 and 9 are attached (see FIG. 1). The printed wiring board 4 is provided with a large number of notches 4a on the periphery and a plurality of substantially circular through holes 4b in plan view, and is filled with a sealing material (silicon) as will be described later. At that time, air between the printed wiring board 4 and the front wall portion 50 of the cover 5 is removed from the cutout 4a and the through hole 4b to prevent bubbles from remaining.

カバー５は、図２に示すようにアクリル樹脂等の透光性を有する（透明な）合成樹脂材料により、平面視略矩形の前壁部５０並びに前壁部５０の周囲を囲む周壁部５１を有し且つ背面が開口した扁平な矩形箱状に形成されている。周壁部５１は対角線上に位置する一対の角部分において内向きに屈曲され、これら一対の角部分には開口端縁から延設された平坦なねじ止め部５２が一体に形成されている。２つのねじ止め部５２には取付ねじ７を挿通するねじ挿通溝５２ａが形成されている。またカバー５は、前壁部５０の各辺の中央並びに四隅において前壁部５０並びに周壁部５１に跨って突設された複数（図示例では１１個）の第１のリブ５３と、対向する一対の周壁部５１より突設された複数（図示例では２個）の第２のリブ５４とを具備している。第１のリブ５３は、図２（ｅ）に示すように薄肉の矩形板状に形成されてプリント配線板４の表面に当接する。また第２のリブ５４は、図２（ｅ）に示すように前壁部５０に近づくにつれて周壁部５１からの突出量が増加する幅細の四角錐状に形成されている。すなわち、発光ダイオード３が実装された面（表面）を前壁部５０に対向させる形でプリント配線板４をカバー５内に押し込めば、第２のリブ５４の傾斜面に摺接しながらプリント配線板４が撓み、やがて第２のリブ５４を乗り越えるとプリント配線板４の表面に第１のリブ５３が当接するとともにプリント配線板４の裏面に第２のリブ５４が当接し、プリント配線板４が第１及び第２のリブ５３，５４の間に狭持されることになる。   As shown in FIG. 2, the cover 5 is made of a transparent resin material having transparency (transparent) such as acrylic resin, and includes a front wall portion 50 that is substantially rectangular in plan view and a peripheral wall portion 51 that surrounds the periphery of the front wall portion 50. It has a flat rectangular box shape with a back surface opened. The peripheral wall portion 51 is bent inward at a pair of corner portions located on a diagonal line, and a flat screwing portion 52 extending from the opening edge is integrally formed at the pair of corner portions. The two screwing portions 52 are formed with screw insertion grooves 52a through which the attachment screws 7 are inserted. The cover 5 faces a plurality of (11 in the illustrated example) first ribs 53 projecting across the front wall 50 and the peripheral wall 51 at the center and at the four corners of each side of the front wall 50. A plurality of (two in the illustrated example) second ribs 54 projecting from the pair of peripheral wall portions 51 are provided. The first rib 53 is formed in a thin rectangular plate shape as shown in FIG. 2E and abuts on the surface of the printed wiring board 4. Further, as shown in FIG. 2 (e), the second rib 54 is formed in a narrow quadrangular pyramid shape in which the amount of protrusion from the peripheral wall portion 51 increases as it approaches the front wall portion 50. That is, if the printed wiring board 4 is pushed into the cover 5 with the surface (front surface) on which the light emitting diode 3 is mounted facing the front wall portion 50, the printed wiring board is slidably in contact with the inclined surface of the second rib 54. 4 is bent, and eventually the second rib 54 is overcome, the first rib 53 comes into contact with the surface of the printed wiring board 4 and the second rib 54 comes into contact with the back surface of the printed wiring board 4. It is sandwiched between the first and second ribs 53 and 54.

ここで、第１のリブ５３は前壁部５０並びに周壁部５１に跨って突設されているからスライドコアを使用する必要はないが、第２のリブ５４は前壁部５０との間に隙間を空けて周壁部５１から突設されているからスライドコアを使用する必要があり、図２（ａ）において二点破線で示した範囲Ｓがカバー５の成型時に第２のリブ５４を形成するためにスライドコアが用いられる範囲となる。従来技術で説明したようにスライドコアが用いられる範囲Ｓにおいては前壁部５０にひけやウェルドマークなどの成型不良が発生し易い。そこで、図２（ａ）に示すようにスライドコアの範囲Ｓと、プリント配線板４の表面に実装される発光ダイオード３とが前壁部５０の法線方向からみて重ならず、プリント配線板４の発光ダイオード３が実装されている位置から離れた位置でプリント配線板４の裏面に第２のリブ５４が当接するようにして、前壁部５０における第２のリブ５３と対向する部位に成型不良が発生しても配光の乱れなどの不具合が生じ難くしている。   Here, since the first rib 53 protrudes across the front wall portion 50 and the peripheral wall portion 51, it is not necessary to use a slide core, but the second rib 54 is between the front wall portion 50 and the front wall portion 50. Since it projects from the peripheral wall 51 with a gap, it is necessary to use a slide core. A range S indicated by a two-dot broken line in FIG. 2A forms the second rib 54 when the cover 5 is molded. This is the range in which the slide core is used. As described in the prior art, in the range S where the slide core is used, molding defects such as sink marks and weld marks are likely to occur on the front wall portion 50. Therefore, as shown in FIG. 2A, the range S of the slide core and the light emitting diode 3 mounted on the surface of the printed wiring board 4 do not overlap with each other when viewed from the normal direction of the front wall portion 50. The second rib 54 is in contact with the back surface of the printed wiring board 4 at a position away from the position where the four light emitting diodes 3 are mounted. Even if molding defects occur, problems such as disturbance of light distribution are less likely to occur.

上述のように本実施形態によれば、プリント配線板４の発光ダイオード３が実装されている位置から離れた位置で第２のリブ５４がプリント配線板４の裏面に当接するようにしているので、前壁部５０における第２のリブ５４と対向する部位に成型不良が発生しても配光の乱れなどの不具合が生じ難くなっている。   As described above, according to the present embodiment, the second rib 54 contacts the back surface of the printed wiring board 4 at a position away from the position where the light emitting diode 3 of the printed wiring board 4 is mounted. Even if a molding failure occurs in a portion of the front wall portion 50 that faces the second rib 54, it is difficult for problems such as disturbance of light distribution to occur.

本発明の実施形態を示し、（ａ）は正面図、（ｂ）は下面図である。The embodiment of this invention is shown, (a) is a front view, (b) is a bottom view. 同上におけるカバーを示し、（ａ）は正面図、（ｂ）は同図（ａ）のＢ−Ｂ’線断面矢視図、（ｃ）は右側面図、（ｄ）は同図（ａ）のＡ−Ａ’線断面矢視図、（ｅ）は要部の断面図である。The cover in the above is shown, (a) is a front view, (b) is a cross-sectional view taken along the line BB ′ of FIG. (A), (c) is a right side view, and (d) is the same figure (a). AA ′ line cross-sectional arrow view of FIG. 同上におけるプリント配線板を示し、（ａ）は表面図、（ｂ）は裏面図である。The printed wiring board in the same as above is shown, (a) is a front view and (b) is a back view. 同上における取付台を示し、（ａ）は正面図、（ｂ）は右側面図である。The mount in the same is shown, (a) is a front view, (b) is a right side view.

符号の説明Explanation of symbols

１ 取付台
２ 光源ユニット
３ 発光ダイオード
４ プリント配線板
５ カバー
５０ 前壁部
５１ 周壁部
５３ 第１のリブ
５４ 第２のリブ DESCRIPTION OF SYMBOLS 1 Mounting base 2 Light source unit 3 Light emitting diode 4 Printed wiring board 5 Cover 50 Front wall part 51 Peripheral wall part 53 1st rib 54 2nd rib

Claims (1)

光源として発光ダイオードを用いる照明器具であって、複数個の発光ダイオードと、４つの辺の長さがほぼ等しい四辺形状に形成されて当該発光ダイオードが表面の周縁近傍に実装されるプリント配線板と、透光性を有する合成樹脂材料によって一面が開口する箱状に形成され内部にプリント配線板が収納されるカバーと、当該カバーが取り付けられる基台とを備え、カバーは、発光ダイオードが実装されているプリント配線板の表面と対向する前壁部と、前壁部の周囲を囲む周壁部と、前壁部並びに周壁部に跨って突設されプリント配線板の表面に当接する１乃至複数の第１のリブと、周壁部より突設されてプリント配線板の裏面に当接する１乃至複数の第２のリブとを具備し、第２のリブが、プリント配線板の発光ダイオードが実装されている位置から離れた位置でプリント配線板の裏面に当接し、前記プリント配線板は、前記４つの辺にそれぞれ複数の切り欠きが設けられるとともに、内側に複数の貫通孔が設けられていることを特徴とする照明器具。 A lighting fixture using a light-emitting diode as a light source, a plurality of light-emitting diodes, a printed wiring board formed in a quadrilateral shape in which the lengths of four sides are substantially equal, and the light-emitting diodes being mounted near the periphery of the surface; A cover formed with a translucent synthetic resin material in the shape of a box with one side open, and in which a printed wiring board is stored, and a base on which the cover is mounted. A front wall portion facing the surface of the printed wiring board, a peripheral wall portion surrounding the front wall portion, and one or a plurality of abutting projections straddling the front wall portion and the peripheral wall portion and contacting the surface of the printed wiring board A first rib, and one or more second ribs protruding from the peripheral wall portion and contacting the back surface of the printed wiring board, and the second rib is mounted with a light emitting diode of the printed wiring board. Contact the rear surface of the printed wiring board at a position away from that position, the printed wiring board, wherein the four sides with their respective plurality of cut-outs are provided, a plurality of through holes are provided on the inner side A lighting apparatus characterized by that.
JP2005199292A 2005-07-07 2005-07-07 lighting equipment Expired - Fee Related JP4710446B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0866946A (en) * 1994-08-30 1996-03-12 Idemitsu Petrochem Co Ltd Injection molding device of synthetic resin molded piece
JPH0968343A (en) * 1995-08-30 1997-03-11 Yamatake Honeywell Co Ltd Housing structure of electric appliance
JP2000280830A (en) * 1999-03-31 2000-10-10 Polyplastics Co Molding method for roof rail stay
JP2002304904A (en) * 2001-04-04 2002-10-18 Matsushita Electric Works Ltd Led lighting system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0866946A (en) * 1994-08-30 1996-03-12 Idemitsu Petrochem Co Ltd Injection molding device of synthetic resin molded piece
JPH0968343A (en) * 1995-08-30 1997-03-11 Yamatake Honeywell Co Ltd Housing structure of electric appliance
JP2000280830A (en) * 1999-03-31 2000-10-10 Polyplastics Co Molding method for roof rail stay
JP2002304904A (en) * 2001-04-04 2002-10-18 Matsushita Electric Works Ltd Led lighting system

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