JP2010262846A - Luminaire - Google Patents

Luminaire Download PDF

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JP2010262846A
JP2010262846A JP2009113415A JP2009113415A JP2010262846A JP 2010262846 A JP2010262846 A JP 2010262846A JP 2009113415 A JP2009113415 A JP 2009113415A JP 2009113415 A JP2009113415 A JP 2009113415A JP 2010262846 A JP2010262846 A JP 2010262846A
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light source
source substrate
heat
heat dissipation
substrate
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JP5537833B2 (en
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Koji Saito
公史 齋藤
Yasuo Imai
康雄 今井
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Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
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Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance efficiency of heat dissipation through good heat conduction from a light source substrate to a heat dissipation member, and also to prevent the occurrence of cracks on the light source substrate, in a luminaire with the light source substrate mounting the light source and the heat dissipation member. <P>SOLUTION: The luminaire holds the light source substrate between a reflector and the heat dissipation member by attaching to the heat dissipation member which is arranged on one face side of the light source substrate, the reflector which is arranged on the other face side of the light source substrate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、例えば、光源が実装される光源基板の背面に放熱部材が設けられた照明器具に関する。   The present invention relates to, for example, a lighting fixture in which a heat dissipation member is provided on the back surface of a light source substrate on which a light source is mounted.

特許文献１には、表面積の大きな器具本体に、光源部と電源部と電源端子台とを取り付けた照明器具についての記載がある。この照明器具は、器具本体の表面積を大きくすることにより、放熱性能を高めている。   Patent Document 1 describes a lighting fixture in which a light source unit, a power source unit, and a power terminal block are attached to a fixture body having a large surface area. This lighting fixture has improved heat dissipation performance by increasing the surface area of the fixture body.

特開２００８−１８６７７６号公報JP 2008-186776 A

光源基板は光源から発生する熱により温度が上昇する。特に、光源基板に複数の光源を実装した場合、温度が上昇し易い。光源基板の温度が上昇すると、光源の発光効率が悪くなる。そのため、光源基板の熱を放熱する必要がある。
光源基板の熱を放熱する方法としては、光源基板の背面にヒートシンクとなる放熱部材を密着するように配置する方法が考えられる。この方法では、光源基板と放熱部材の密着の状態によっては光源基板の熱がうまく放熱部材へ伝導せず、放熱効率が悪い。そこで、光源基板と放熱部材とをねじ止めすることにより、光源基板と放熱部材とを強固に結合することが考えられる。しかし、光源基板と放熱部材とをねじ止めした場合、光源基板と放熱部材との密着面全体に一様に力がかからず、光源基板と放熱部材とが局部的にしか密着せず、熱がうまく放熱部材へ伝導しない。また、ねじ止めした場合、光源基板に局部的に力がかかるため、光源基板にクラックなどが生じる虞がある。 The temperature of the light source substrate rises due to heat generated from the light source. In particular, when a plurality of light sources are mounted on the light source substrate, the temperature tends to rise. When the temperature of the light source substrate rises, the light emission efficiency of the light source deteriorates. Therefore, it is necessary to radiate the heat of the light source substrate.
As a method of dissipating heat from the light source substrate, a method of arranging a heat dissipating member serving as a heat sink on the back surface of the light source substrate is conceivable. In this method, depending on the state of close contact between the light source substrate and the heat radiating member, the heat of the light source substrate may not be conducted well to the heat radiating member, resulting in poor heat radiating efficiency. Therefore, it is conceivable to firmly bond the light source substrate and the heat dissipation member by screwing the light source substrate and the heat dissipation member. However, when the light source board and the heat radiating member are screwed together, no uniform force is applied to the entire contact surface between the light source board and the heat radiating member, and the light source board and the heat radiating member are only in close contact with each other. Does not conduct well to the heat dissipation member. Further, when screwed, a force is locally applied to the light source substrate, so that the light source substrate may be cracked.

この発明は、例えば、熱を光源基板から放熱部材へうまく熱伝導させ放熱効率を高くするとともに、光源基板のクラック発生を防止することを目的とする。   An object of the present invention is, for example, to conduct heat well from a light source substrate to a heat radiating member to increase heat radiation efficiency and to prevent generation of cracks in the light source substrate.

この発明に係る照明器具は、例えば、光源が実装される光源基板と、前記光源基板の一方の面側に設けられた放熱部材と、前記光源基板の他方の面側に設けられた反射板とを備え、前記反射板を前記放熱部材に取付部材により取り付けることにより、前記光源基板を前記反射板と前記放熱部材との間に挟持することを特徴とする。   The luminaire according to the present invention includes, for example, a light source substrate on which a light source is mounted, a heat dissipation member provided on one surface side of the light source substrate, and a reflector provided on the other surface side of the light source substrate. The light source substrate is sandwiched between the reflection plate and the heat dissipation member by attaching the reflection plate to the heat dissipation member with an attachment member.

この発明に係る照明器具は、反射板を放熱部材に取り付けることにより、光源基板を反射板と放熱部材との間に挟持する。このため、光源基板に局部的な力がかかることなく、光源基板を放熱部材に一様な力で密着させることができる。その結果、熱を光源基板から放熱部材へうまく熱伝導させ放熱性能を高くできるとともに、光源基板のクラック発生を防止することができる。   The lighting fixture which concerns on this invention clamps a light source board | substrate between a reflecting plate and a heat radiating member by attaching a reflecting plate to a heat radiating member. For this reason, a light source board | substrate can be closely_contact | adhered to a heat radiating member with uniform force, without applying local force to a light source board | substrate. As a result, heat can be conducted well from the light source substrate to the heat radiating member to improve heat radiating performance, and cracks in the light source substrate can be prevented.

照明器具１０の前面側から見た一部分解斜視図。FIG. 3 is a partially exploded perspective view seen from the front side of the lighting fixture 10. 照明器具１０の背面側から見た一部分解斜視図。FIG. 3 is a partially exploded perspective view seen from the back side of the lighting fixture 10. 照明器具１０の断面図。FIG. 3 is a cross-sectional view of the lighting fixture 10. 図３の破線部で囲った部分の拡大図。The enlarged view of the part enclosed with the broken-line part of FIG.

実施の形態１．
図１は、照明器具１０の前面側（反射板２側）から見た一部分解斜視図である。
図２は、照明器具１０の背面側（放熱フィン３側）から見た一部分解斜視図である。
図３は、照明器具１０の断面図である。
図４は、図３の破線部で囲った部分の拡大図である。
なお、図１，２では、分かり易くするため、カバー６を省略している。また、図１，２では、反射板２が放熱フィン３に取り付けられていない状態である。
図１から図４に示すように、照明器具１０は、光源基板１、絶縁シート１ａ、反射板２、放熱フィン３（放熱部材の一例）、ねじ４（取付部材の一例）、電源ケース５、カバー６を備える。 Embodiment 1 FIG.
FIG. 1 is a partially exploded perspective view seen from the front side (the reflecting plate 2 side) of the luminaire 10.
FIG. 2 is a partially exploded perspective view seen from the back side (radiation fin 3 side) of the lighting fixture 10.
FIG. 3 is a cross-sectional view of the lighting fixture 10.
4 is an enlarged view of a portion surrounded by a broken line in FIG.
In FIGS. 1 and 2, the cover 6 is omitted for easy understanding. 1 and 2, the reflector 2 is not attached to the heat radiating fins 3.
As shown in FIGS. 1 to 4, the luminaire 10 includes a light source substrate 1, an insulating sheet 1 a, a reflector 2, a heat radiating fin 3 (an example of a heat radiating member), a screw 4 (an example of a mounting member), a power supply case 5, A cover 6 is provided.

光源基板１は、平板状に形成される。光源基板１には、中央部に複数の光源７（ここでは、ＬＥＤ）が一様に実装される。光源基板１の周縁部には、後述する光源基板位置決めピン２−５に対応する位置に光源基板位置決めガイド１−１（貫通部の一例）が形成される。
絶縁シート１ａは、平面状に形成され、周縁部には、後述するねじ止め孔２−２に対応する位置に切り欠き１ａ−１と、後述する絶縁シート位置決めピン３−２に対応する絶縁シート位置決め孔１ａ−２が形成される。 The light source substrate 1 is formed in a flat plate shape. A plurality of light sources 7 (here, LEDs) are uniformly mounted on the light source substrate 1 at the center. A light source substrate positioning guide 1-1 (an example of a penetrating portion) is formed on the periphery of the light source substrate 1 at a position corresponding to a light source substrate positioning pin 2-5 described later.
The insulating sheet 1a is formed in a flat shape, and an insulating sheet corresponding to a notch 1a-1 at a position corresponding to a screwing hole 2-2 described later and an insulating sheet positioning pin 3-2 described later is formed on the peripheral edge. Positioning hole 1a-2 is formed.

反射板２は、光源基板１の光源７が実装された面側（前面側）に設けられる。反射板２には、光源基板１に実装された各光源７に対応して光出口２−１が中央部に形成されるとともに、周縁部に複数のねじ止め孔２−２が形成される。また、中央部と周縁部との境界部分には、光出口２−１が形成された部分の周囲を囲うように光源基板１側に突出した境界突出部２−３が形成される。また、光源基板１側に突出し、光源基板１が取り付けられるときに、光源基板１の位置をガイドする光源基板位置決めピン２−５が形成される。
光出口２−１は、光源７が発する光が放射される孔である。光出口２−１の周囲は、光源基板１側に突出して出口突出部２−４を形成する。なお、光源７は、光源基板１の中央部に一様に実装されているため、光出口２−１は、反射板２の中央部に一様に形成される。
ねじ止め孔２−２は、周縁部に均等の間隔に配置され、後述するねじ４が挿入される孔である。ここでは、ねじ止め孔２−２は、４箇所に形成される。 The reflection plate 2 is provided on the surface side (front side) of the light source substrate 1 on which the light source 7 is mounted. In the reflecting plate 2, a light outlet 2-1 is formed at the center portion corresponding to each light source 7 mounted on the light source substrate 1, and a plurality of screw holes 2-2 are formed at the peripheral portion. In addition, a boundary protruding portion 2-3 that protrudes toward the light source substrate 1 so as to surround the periphery of the portion where the light exit 2-1 is formed is formed at the boundary portion between the central portion and the peripheral portion. Further, light source substrate positioning pins 2-5 that project toward the light source substrate 1 and guide the position of the light source substrate 1 when the light source substrate 1 is attached are formed.
The light exit 2-1 is a hole through which light emitted from the light source 7 is emitted. The periphery of the light outlet 2-1 protrudes toward the light source substrate 1 to form an outlet protrusion 2-4. Since the light source 7 is uniformly mounted on the central portion of the light source substrate 1, the light outlet 2-1 is uniformly formed on the central portion of the reflecting plate 2.
The screwing holes 2-2 are holes that are arranged at equal intervals on the peripheral edge and into which screws 4 described later are inserted. Here, the screw holes 2-2 are formed in four places.

放熱フィン３は、光源基板１の光源７が実装された面と反対の面側（背面側）に設けられる。放熱フィン３には表面積が大きくなるように複数のフィンが形成され、光源７が発した熱や後述する電源ケース５に収納された電源が発した熱を放熱する。また、放熱フィン３には、光源基板１が取り付けられる面に突出して、絶縁シート１ａの位置をガイドする絶縁シート位置決めピン３−２が形成される。放熱フィン３は、アルミダイキャスト等により形成される。   The heat radiation fin 3 is provided on the surface side (back side) opposite to the surface on which the light source 7 of the light source substrate 1 is mounted. A plurality of fins are formed on the heat dissipating fin 3 so as to increase the surface area, and dissipate heat generated by the light source 7 and heat generated by a power source housed in a power supply case 5 described later. In addition, the heat radiation fin 3 is formed with insulating sheet positioning pins 3-2 that protrude from the surface to which the light source substrate 1 is attached and guide the position of the insulating sheet 1a. The heat radiating fins 3 are formed by aluminum die casting or the like.

ねじ４は、反射板２のねじ止め孔２−２に挿入され、絶縁シート１ａの切り欠き１ａ−１を貫通して、放熱フィン３のねじ止め孔３−１に挿入されて固定される。つまり、ねじ４は、反射板２と放熱フィン３との間に光源基板１を挟みながら、反射板２と放熱フィン３とを固定する。すなわち、ねじ４は、光源基板１には直接触れていない。   The screw 4 is inserted into the screwing hole 2-2 of the reflection plate 2, passes through the notch 1a-1 of the insulating sheet 1a, and is inserted into the screwing hole 3-1 of the radiating fin 3 and fixed. That is, the screw 4 fixes the reflecting plate 2 and the radiating fin 3 while sandwiching the light source substrate 1 between the reflecting plate 2 and the radiating fin 3. That is, the screw 4 does not touch the light source substrate 1 directly.

電源ケース５は、内部に電源を収納したケースであり、放熱フィン３の中央部に配置される。   The power supply case 5 is a case in which a power supply is housed, and is disposed at the center of the heat radiation fin 3.

カバー６は、反射板２の周囲を覆うように設けられ、光が放射される方向を限定する。
これは、反射板２が光源７に対応して個々の光を制御するのに対し、照明器具１０から放射される全体的な光を制御している。
なお、光源７が発する光の制御を反射板２のみで行える場合は、カバー６は、光を制御をする機能を備えることなく、ねじ４などを覆う化粧カバーとしての機能のみを備えてもよい。
また、カバー６は、天井などに設けられた取付穴に固定する固定部材としての機能を備えてもよい。 The cover 6 is provided so as to cover the periphery of the reflecting plate 2 and limits the direction in which light is emitted.
This controls the overall light emitted from the luminaire 10 while the reflector 2 controls the individual light corresponding to the light source 7.
If the light emitted from the light source 7 can be controlled only by the reflector 2, the cover 6 may have only a function as a decorative cover that covers the screws 4 and the like without having a function of controlling light. .
Further, the cover 6 may have a function as a fixing member that fixes to a mounting hole provided in a ceiling or the like.

上述したように、反射板２を放熱フィン３にねじ４により固定することにより、光源基板１が反射板２と放熱フィン３とに挟まれて固定される。
ここで、反射板２には、光源基板１側に突出した境界突出部２−３、出口突出部２−４が形成される。光源基板１は、この境界突出部２−３、出口突出部２−４により、放熱フィン３へ押し付けられる。
特に、光出口２−１は、反射板２の中央部に一様に形成されるため、光源基板１の中央部は光出口２−１により一様に放熱フィン３へ押し付けられる。また、光源基板１のうち光源７が実装された部分の外周は、境界突出部２−３により放熱フィン３へ押し付けられる。
また、光出口２−１が、光源７の周囲に接するので、光源７が配置される部分の光源基板１が特に放熱フィン３に押し付けられる。そのため、光源７が発する熱を効率よく放熱フィン３に熱伝導させることができる。
ここで、光源７の周囲を放熱フィン３に押し付ける力が強すぎると、光源基板１の中央部分が押されるため、外周部分が放熱フィン３に対して反り返る恐れがある。
しかしながら、境界突出部２−３が光源基板１の外周部分を放熱フィン３に押し付けるので、光源基板１が反り返る恐れがなく、また、光源基板１をほぼ均等な力で放熱フィン３に押し付けることができる。 As described above, the light source substrate 1 is sandwiched and fixed between the reflection plate 2 and the radiation fin 3 by fixing the reflection plate 2 to the radiation fin 3 with the screws 4.
Here, the reflecting plate 2 is formed with a boundary protruding portion 2-3 and an outlet protruding portion 2-4 protruding toward the light source substrate 1 side. The light source substrate 1 is pressed against the radiating fin 3 by the boundary protrusion 2-3 and the outlet protrusion 2-4.
In particular, since the light exit 2-1 is uniformly formed at the central portion of the reflecting plate 2, the central portion of the light source substrate 1 is uniformly pressed against the heat radiation fin 3 by the light exit 2-1. Further, the outer periphery of the portion of the light source substrate 1 where the light source 7 is mounted is pressed against the heat radiation fin 3 by the boundary protrusion 2-3.
Further, since the light outlet 2-1 is in contact with the periphery of the light source 7, the portion of the light source substrate 1 where the light source 7 is disposed is pressed against the heat radiation fin 3 in particular. Therefore, the heat generated by the light source 7 can be efficiently conducted to the radiating fin 3.
Here, if the force pressing the periphery of the light source 7 against the heat radiating fins 3 is too strong, the central portion of the light source substrate 1 is pushed, so that the outer peripheral portion may warp against the heat radiating fins 3.
However, since the boundary protrusion 2-3 presses the outer peripheral portion of the light source substrate 1 against the heat radiating fin 3, there is no fear that the light source substrate 1 is warped, and the light source substrate 1 can be pressed against the heat radiating fin 3 with almost equal force. it can.

したがって、光源基板１は、反射板２により全体的に放熱フィン３に接する。つまり、光源基板１に局部的な力がかかることなく、光源基板１がシャフト３に一様に密着する。そのため、光源基板１からの熱を放熱フィン３にうまく熱伝導させることができ、放熱性能を高くすることができる。また、光源基板１にクラックが発生することを防止することができる。
また、光源基板１とねじ４とが金属である場合であっても、光源基板１がねじ４に直接触れないため、光源基板１の光源７実装部分とねじ４との間に十分な絶縁距離をとることができる。 Therefore, the light source substrate 1 is entirely in contact with the heat radiating fins 3 by the reflecting plate 2. That is, the light source substrate 1 is uniformly adhered to the shaft 3 without applying a local force to the light source substrate 1. Therefore, the heat from the light source substrate 1 can be successfully conducted to the heat radiating fins 3, and the heat radiation performance can be improved. Moreover, it is possible to prevent the light source substrate 1 from being cracked.
Further, even if the light source substrate 1 and the screw 4 are made of metal, the light source substrate 1 does not directly touch the screw 4, so that a sufficient insulation distance is provided between the light source 7 mounting portion of the light source substrate 1 and the screw 4. Can be taken.

また、光源基板１の光源基板位置決めガイド１−１に光源基板位置決めピン２−５を接触させることで、光源基板１がずれて配置されることを防止できる。   Further, the light source substrate positioning pin 2-5 is brought into contact with the light source substrate positioning guide 1-1 of the light source substrate 1, whereby the light source substrate 1 can be prevented from being displaced.

なお、光源基板１と放熱フィン３との間に配置される絶縁シート１ａに、熱伝導性の高い材質のものを用いると、光源７および光源基板１の熱伝導率を高めることができる。
また、切り欠き１ａ−１は、孔であってもよい。 In addition, when the thing of a material with high heat conductivity is used for the insulating sheet 1a arrange | positioned between the light source substrate 1 and the radiation fin 3, the heat conductivity of the light source 7 and the light source substrate 1 can be raised.
Moreover, the notch 1a-1 may be a hole.

１ 光源基板、１−１ 光源基板位置決めガイド、１ａ 絶縁シート、１ａ−１ 切り欠き、１ａ−２ 絶縁シート位置決め孔、２ 反射板、２−１ 光出口、２−２ ねじ止め孔、２−３ 境界突出部、２−４ 出口突出部、２−５ 光源基板位置決めピン、３ 放熱フィン、３−１ ねじ止め孔、３−２ 絶縁シート位置決めピン、４ ねじ、５ 電源ケース、６ カバー、７ 光源、１０ 照明器具。   DESCRIPTION OF SYMBOLS 1 Light source board, 1-1 Light source board positioning guide, 1a Insulating sheet, 1a-1 Notch, 1a-2 Insulating sheet positioning hole, 2 Reflecting plate, 2-1 Light exit, 2-2 Screwing hole, 2-3 Boundary protrusion, 2-4 Exit protrusion, 2-5 Light source board positioning pin, 3 Radiation fin, 3-1 Screw hole, 3-2 Insulating sheet positioning pin, 4 Screw, 5 Power supply case, 6 Cover, 7 Light source 10 Lighting equipment.

Claims (3)

光源が実装される光源基板と、
前記光源基板の一方の面側に設けられた放熱部材と、
前記光源基板の他方の面側に設けられた反射板とを備え、
前記反射板を前記放熱部材に取付部材により取り付けることにより、前記光源基板を前記反射板と前記放熱部材との間に挟持する
ことを特徴とする照明器具。 A light source substrate on which the light source is mounted;
A heat dissipating member provided on one surface side of the light source substrate;
A reflector provided on the other surface side of the light source substrate;
The lighting apparatus, wherein the light source substrate is sandwiched between the reflection plate and the heat dissipation member by attaching the reflection plate to the heat dissipation member with an attachment member. 前記反射板には、前記光源基板側へ突出した複数の突出部が形成され、
前記反射板を前記放熱部材に取付部材により取り付けた場合に、前記反射板に形成された複数の突出部により前記光源基板を前記放熱部材へ押し付ける
ことを特徴とする請求項１に記載の照明器具。 The reflection plate is formed with a plurality of protrusions protruding toward the light source substrate.
2. The lighting apparatus according to claim 1, wherein when the reflection plate is attached to the heat dissipation member with an attachment member, the light source substrate is pressed against the heat dissipation member by a plurality of protrusions formed on the reflection plate. . 前記光源基板には、切り欠き状又は孔状の貫通部が形成され、
前記反射板には、所定の位置に前記光源基板側へ突出した光源基板位置決めピンが形成され、
前記反射板を前記放熱部材に取付部材により取り付けた場合に、前記反射板に形成された光源基板位置決めピンが前記光源基板に形成された貫通部を貫通する
ことを特徴とする請求項１又は２に記載の照明器具。 The light source substrate is formed with a notch-shaped or hole-shaped through-hole,
A light source substrate positioning pin protruding toward the light source substrate at a predetermined position is formed on the reflector.
The light source board positioning pin formed in the said reflecting plate penetrates the penetration part formed in the said light source board, when the said reflecting plate is attached to the said heat radiating member with an attachment member. The lighting fixture as described in.
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