JP5762004B2 - LED lighting fixtures - Google Patents

LED lighting fixtures Download PDF

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JP5762004B2
JP5762004B2 JP2011001858A JP2011001858A JP5762004B2 JP 5762004 B2 JP5762004 B2 JP 5762004B2 JP 2011001858 A JP2011001858 A JP 2011001858A JP 2011001858 A JP2011001858 A JP 2011001858A JP 5762004 B2 JP5762004 B2 JP 5762004B2
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led
capacitor
aluminum base
power supply
base substrate
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JP2012146406A (en
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秀和 大矢
秀和 大矢
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Fuji Industrial Co Ltd
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Description

本発明は、ＬＥＤをＡＣ電源で点灯するＬＥＤ照明器具に関する。   The present invention relates to an LED lighting apparatus that lights an LED with an AC power source.

従来、ＬＥＤを光源としたＬＥＤ照明器具においては、ＬＥＤの寿命は高温状態になると著しく短くなるから、ＬＥＤから発生する熱の放熱性能を向上することが重要である。
電球形ＬＥＤ照明器具においては、ＬＥＤをアルミベース基板の表面に設け、このアルミベース基板の裏面をアルミのヒートシンク（照明器具の外皮）に接触し、ＬＥＤから発生する熱をアルミのヒートシンクに伝えて冷却するようにしている（特許文献１参照）。 Conventionally, in an LED lighting apparatus using LEDs as a light source, the lifetime of the LED is remarkably shortened when it is in a high temperature state. Therefore, it is important to improve the heat dissipation performance of the heat generated from the LED.
In a bulb-type LED lighting fixture, an LED is provided on the surface of an aluminum base substrate, the back surface of the aluminum base substrate is brought into contact with an aluminum heat sink (the outer shell of the lighting fixture), and heat generated from the LED is transmitted to the aluminum heat sink. It is made to cool (refer patent document 1).

実用新案登録第３１６４４６７号公報Utility Model Registration No. 3164467

前述した従来の電球形ＬＥＤ照明器具は、ＬＥＤから発生する熱を、照明器具の外皮となるアルミのヒートシンクから放熱するので、そのアルミのヒートシンクは大きな放熱面積を必要とするから、アルミのヒートシンクが大きく、照明器具全体が大型で、高価格である。
一方、レンジフードにおいては、フード本体に照明器具を取り付けることがあるが、そのフード本体の照明器具の取り付けスペースや、価格の点などから、前述の電球形ＬＥＤ照明器具をフード本体に取り付けし難いことがある。 The above-described conventional bulb-type LED lighting fixture radiates the heat generated from the LED from the aluminum heat sink, which is the outer skin of the lighting fixture. Large, the entire lighting fixture is large and expensive.
On the other hand, in a range hood, a lighting fixture may be attached to the hood main body, but it is difficult to attach the above-described bulb-shaped LED lighting fixture to the hood main body because of the installation space of the lighting fixture in the hood main body or the price. Sometimes.

本発明者等は、ＬＥＤから発生する熱の放熱性能に優れていると共に、小型で低価格とすることができるＬＥＤ照明回路及びＬＥＤ照明器具とするために鋭意、研究、実験した結果、次のことを見出した。
すなわち、レンジフードのフード本体は金属製で、広い面積が空気と触れているので、広い放熱面積を有していることに着目し、ＬＥＤを設けたアルミベース基板をフード本体に取り付け、ＬＥＤから発生する熱をフード本体から放熱するようにした。
このようにすることで、従来のように大きなヒートシンクが不要であるから、小型で、低価格であると共に、放熱性能に優れているＬＥＤ照明器具とすることができた。 As a result of earnest, research and experiment, the present inventors have made the following LED lighting circuit and LED lighting fixture that are excellent in the heat dissipation performance of heat generated from the LED and can be made small and low in price. I found out.
That is, the hood body of the range hood is made of metal, and since a wide area is in contact with air, pay attention to the fact that it has a wide heat dissipation area, and attach an aluminum base substrate with LEDs to the hood body, The generated heat is dissipated from the hood body.
By doing in this way, since the big heat sink like the conventional one is unnecessary, it was able to be set as the LED lighting fixture which was small, was cheap, and was excellent in heat dissipation performance.

しかしながら、前述のようにした場合に、ＬＥＤが点灯したり、うっすら点灯する等の誤点灯するという問題が生じた。
この原因としては、フード本体が接地（アース）しているので、ＡＣ電源ラインからノイズ（漏えい電流）が注入されると、そのノイズが、アルミベース基板からフード本体に流れ、このノイズ（漏えい電流）がＬＥＤに流れるために、ＬＥＤが前述のように誤点灯すると考えられる。
特に、ＡＣ電源からＡＣ１００ＶをＬＥＤに直接流すことで、ＬＥＤを点灯するようにした場合には、前述のＬＥＤの誤点灯が顕著に現れた。 However, in the case described above, there has been a problem that the LED is lit up or lightly lit up.
The cause of this is that the hood body is grounded, so when noise (leakage current) is injected from the AC power line, the noise flows from the aluminum base board to the hood body, and this noise (leakage current) ) Flows to the LED, it is considered that the LED is erroneously lit as described above.
In particular, when the LED is turned on by flowing AC 100V directly from the AC power supply to the LED, the aforementioned erroneous lighting of the LED remarkably appears.

前述した従来の電球形ＬＥＤ照明器具は、アルミのヒートシンクが機器本体と電気的に絶縁され、接地されないので、ＡＣ電源ラインにノイズ（漏えい電流）が注入されてもアースに流れないので、ＬＥＤにこのノイズが流れないから、誤点灯することがなかった。   In the above-described conventional bulb-type LED lighting fixture, the aluminum heat sink is electrically insulated from the equipment body and is not grounded. Since this noise did not flow, there was no false lighting.

本発明の目的は、ＬＥＤから発生する熱の放熱性能に優れていると共に、小型で低価格とすることができ、しかもＡＣ電源ラインに注入されたノイズによってＬＥＤが誤点灯することがないようにしたＬＥＤ照明器具とすることである。   It is an object of the present invention to be excellent in the heat dissipation performance of the heat generated from the LED, to be small and inexpensive, and to prevent the LED from being erroneously turned on by noise injected into the AC power line. LED lighting fixtures.

本発明は、アルミベース２０の表面に絶縁層２１を設け、この絶縁層２１の上に電源パターン２２を設けたアルミベース基板１と、前記絶縁層２１の表面に設けたＬＥＤ２と、前記絶縁層２１の表面に設けた同一の静電容量の第１コンデンサ１１、第２コンデンサ１２を有し、
前記ＬＥＤ２の一端と前記第１コンデンサ１１の一端は、前記電源パターン２２で電気的に導通し、
前記ＬＥＤ２の他端と前記第２コンデンサ１２の一端は、前記電源パターン２２で電気的に導通し、
前記第１コンデンサ１１の他端と前記第２コンデンサ１２の他端は、前記電源パターン２２で電気的に導通し、この電源パターン２２の前記第１コンデンサ１１の他端と前記第２コンデンサ１２の他端の中間は、前記アルミベース２０の裏面に導通手段３０で電気的に導通し、
前記アルミベース基板１の前記アルミベース２０の裏面を電気絶縁性及び熱伝導性に優れた部材を介在して、接地された機器本体に取り付けるようにし、
前記ＬＥＤ２の一端は一方の電源ライン５に接続し、前記ＬＥＤ２の他端は他方の電源ライン６に接続するようにしたことを特徴とするＬＥＤ照明器具である。 In the present invention, an insulating layer 21 is provided on the surface of an aluminum base 20, an aluminum base substrate 1 provided with a power supply pattern 22 on the insulating layer 21, an LED 2 provided on the surface of the insulating layer 21, and the insulating layer 21 has a first capacitor 11 and a second capacitor 12 of the same capacitance provided on the surface of
One end of the LED 2 and one end of the first capacitor 11 are electrically connected by the power pattern 22,
The other end of the LED 2 and one end of the second capacitor 12 are electrically connected by the power pattern 22,
The other end of the first capacitor 11 and the other end of the second capacitor 12 are electrically connected by the power supply pattern 22, and the other end of the first capacitor 11 and the second capacitor 12 of the power supply pattern 22 are connected. The middle of the other end is electrically conducted by the conducting means 30 to the back surface of the aluminum base 20,
The back surface of the aluminum base 20 of the aluminum base substrate 1 is attached to a grounded device body through a member having excellent electrical insulation and thermal conductivity ,
The LED lighting device is characterized in that one end of the LED 2 is connected to one power line 5 and the other end of the LED 2 is connected to the other power line 6.

本発明のＬＥＤ照明器具は、前記アルミベース２０の裏面を絶縁放熱シート４を介在して、接地された機器本体に取り付けるようにできる。In the LED lighting apparatus of the present invention, the back surface of the aluminum base 20 can be attached to a grounded device body with the insulating heat radiating sheet 4 interposed therebetween.

本発明によれば、ＬＥＤ２から発生する熱を機器本体から放熱できるから、ＬＥＤ２から発生する熱の放熱機能に優れている。
しかも、ＬＥＤ２から発生する熱を放熱する専用の部材が不要であるから、小型で低価格とすることができる。
さらに、ＡＣ電源ラインに注入されたノイズによってＬＥＤ２が誤点灯することがない。 According to the present invention, since the heat generated from the LED 2 can be radiated from the device main body, the heat radiating function of the heat generated from the LED 2 is excellent.
And since the member for exclusive use which thermally radiates the heat | fever which generate | occur | produces from LED2 is unnecessary, it can be made small and low-cost.
Further, the LED 2 is not erroneously turned on by noise injected into the AC power line.

また、アルミベース基板１にＬＥＤ２と第１・第２コンデンサ１１，１２を設けたことによって、小型で持ち運びし易く、しかも任意の機器本体に簡単に取り付けできる。 In addition, by providing the LED 2 and the first and second capacitors 11 and 12 on the aluminum base substrate 1, it is small and easy to carry, and can be easily attached to any device body.

本発明のＬＥＤ照明回路の実施の形態を示す回路図である。It is a circuit diagram which shows embodiment of the LED lighting circuit of this invention. 本発明のＬＥＤ照明器具の実施の形態を示す平面図である。It is a top view which shows embodiment of the LED lighting fixture of this invention. 図２のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 本発明のＬＥＤ照明器具の使用状態を示す断面図である。It is sectional drawing which shows the use condition of the LED lighting fixture of this invention. 導通手段の第２の実施の形態を示す断面図である。It is sectional drawing which shows 2nd Embodiment of a conduction | electrical_connection means. 導通手段の第３の実施の形態を示す断面図である。It is sectional drawing which shows 3rd Embodiment of a conduction | electrical_connection means.

図１に示すように、アルミベース基板１の表面にＬＥＤ２を設けてＬＥＤ照明部３とする。
前記アルミベース基板１の裏面を電気的に絶縁し、かつ熱が伝わるように、広い放熱面積を有する接地された機器本体、例えばレンジフードのフード本体に取り付けてある。例えば、絶縁放熱シート４を介して機器本体に接するように取り付けてある。
２本のＡＣ電源ライン５，６の一方を前述のＬＥＤ２の一端２ａに接続し、他方をＬＥＤ２の他端２ｂに接続する。
前記２本のＡＣ電源ライン５，６間には、バリスタ７、コンデンサ８が接続されている。
このバリスタ７とコンデンサ８でノーマルモード用のフィルタを構成し、前記２つのＡＣ電源ライン５，６に注入されたノイズをバリスタ７とコンデンサ８で減衰させる。
前記一方のＡＣ電源ライン５にはヒューズ９が設けられ、他方のＡＣ電源ライン６には抵抗１０が設けてある。 As shown in FIG. 1, an LED 2 is provided on the surface of an aluminum base substrate 1 to form an LED illumination unit 3.
The back surface of the aluminum base substrate 1 is electrically insulated and attached to a grounded device body having a large heat radiation area, for example, a hood body of a range hood so that heat is transmitted. For example, it is attached so as to be in contact with the device main body via the insulating heat radiating sheet 4.
One of the two AC power supply lines 5 and 6 is connected to one end 2 a of the LED 2 described above, and the other is connected to the other end 2 b of the LED 2.
A varistor 7 and a capacitor 8 are connected between the two AC power lines 5 and 6.
The varistor 7 and the capacitor 8 constitute a normal mode filter, and the noise injected into the two AC power supply lines 5 and 6 is attenuated by the varistor 7 and the capacitor 8.
The one AC power line 5 is provided with a fuse 9, and the other AC power line 6 is provided with a resistor 10.

このようであるから、前記２本のＡＣ電源ライン５，６に設けた図示しないプラグを図示しないコンセントに差し込み、ＡＣ電源に接続すると共に、図示しないスイッチをＯＮすることでＬＥＤ２が点灯する。
前述のように，ＬＥＤ２が点灯しているときに、そのＬＥＤ２から発生した熱は、アルミベース基板１、絶縁放熱シート４を経て機器本体に伝熱し、その機器本体から放熱される。
これにより、ＬＥＤ２から発生する熱の放熱性能に優れる。
しかも、放熱のための専用の部材が不要であるから、小型で低価格とすることができる。 Therefore, the plugs (not shown) provided on the two AC power supply lines 5 and 6 are inserted into an outlet (not shown) and connected to an AC power source, and the LED 2 is turned on by turning on a switch (not shown).
As described above, when the LED 2 is lit, the heat generated from the LED 2 is transferred to the device body through the aluminum base substrate 1 and the insulating heat radiating sheet 4 and is radiated from the device body.
Thereby, it is excellent in the thermal radiation performance of the heat which generate | occur | produces from LED2.
In addition, since a dedicated member for heat dissipation is not necessary, it is possible to reduce the size and cost.

前記ＡＣ電源ライン５，６と接地されたＰＥ点との間にノイズが注入されることがある。   Noise may be injected between the AC power lines 5 and 6 and the grounded PE point.

例えば、一方のＡＣ電源ライン５にスイッチを設け、プラグを、他方のＡＣ電源ライン６に１００Ｖが流れるようにコンセントに差し込んだ場合に、そのスイッチをＯＦＦとしても、前記他方のＡＣ電源ライン６はＡＣ電源に接続しているので、その他方のＡＣ電源ライン６に点線で示すようにノイズが注入されることがある。
他方のＡＣ電源ライン６にスイッチを設け、プラグを、一方のＡＣ電源ライン５に１００Ｖが流れるようにコンセントを差し込んだ場合に、そのスイッチをＯＦＦしても、一方のＡＣ電源ライン５はＡＣ電源に接続しているので、その一方のＡＣ電源ライン５に一点鎖線で示すようにノイズが注入されることがある。 For example, when a switch is provided in one AC power line 5 and a plug is inserted into an outlet so that 100 V flows through the other AC power line 6, even if the switch is turned off, the other AC power line 6 Since it is connected to an AC power source, noise may be injected into the other AC power source line 6 as indicated by a dotted line.
When a switch is provided on the other AC power line 6 and a plug is inserted so that 100V flows through the other AC power line 5, even if the switch is turned off, the AC power line 5 is Therefore, noise may be injected into one of the AC power supply lines 5 as indicated by a one-dot chain line.

前述のように、ＡＣ電源ライン５，６にノイズが注入されたときにＬＥＤ２が誤点灯することがある。その原因はノイズ（漏えい電流）の一部がアルミベース基板１の表面から裏面へ流れ絶縁放熱シート４を通過し、機器本体から接地に流れるためと推測できるが、次のようにすることで、ＬＥＤ２が誤点灯しないようになった。
すなわち、一方のＡＣ電源ライン５に第１コンデンサ１１の一端を接続すると共に、他方のＡＣ電源ライン６に第２コンデンサ１２の一端を接続し、この第１・第２コンデンサ１１，１２の他端を接続する接続ライン１３を、導通ライン１４でアルミベース基板１の裏面に電気的に接続する。 As described above, the LED 2 may turn on erroneously when noise is injected into the AC power supply lines 5 and 6 . The reason is that a part of the noise (leakage current) flows from the front surface to the back surface of the aluminum base substrate 1 and passes through the insulating heat dissipation sheet 4 and flows from the device main body to the ground , but by doing the following, LED2 will not light up accidentally.
That is, one end of the first capacitor 11 is connected to one AC power line 5 and one end of the second capacitor 12 is connected to the other AC power line 6, and the other ends of the first and second capacitors 11, 12 are connected. Is electrically connected to the back surface of the aluminum base substrate 1 by a conduction line 14.

前述のようにすることで、ＬＥＤ２が誤点灯しないのは、次のようであると考えられる。
一方のＡＣ電源ライン５に一点鎖線で示すようにノイズが注入されると、そのノイズは第１コンデンサ１１で留めておかれる。第１コンデンサ１１で留めておかれないノイズはＡＣ電源ライン５からアルミベース２０に流れ、導通ライン１４を経由して第１コンデンサ１１と第２コンデンサ１２の接合点ｃに流れる。接合点ｃはａ点、ｂ点との電位差がないため、ノイズはここに留まり、ＬＥＤは誤点灯しない。
他方のＡＣ電源ライン６に点線で示すようにノイズが注入されると、そのノイズは第２コンデンサ１２で留めておかれる。第２コンデンサ１２で留めておかれないノイズはＡＣ電源ライン６からアルミベース２０に流れ、導通ライン１４を経由して第１コンデンサ１１と第２コンデンサ１２の接合点ｃに流れる。接合点ｃはａ点、ｂ点と電位差がないため、ノイズはここに留まり、ＬＥＤは誤点灯しない。
前述の説明で、電位差がないとは、ＬＥＤ２が誤点灯する大きさ以上の電位差（３０〜４０Ｖ以下の電位差）がないことである。 It is considered that the reason why the LED 2 is not erroneously turned on as described above is as follows.
When noise is injected into one AC power supply line 5 as indicated by a one-dot chain line , the noise is retained by the first capacitor 11. Noise that cannot be retained by the first capacitor 11 flows from the AC power supply line 5 to the aluminum base 20, and then flows to the junction c between the first capacitor 11 and the second capacitor 12 via the conduction line 14. Since the junction point c has no potential difference between the points a and b, the noise remains here and the LED does not light up erroneously.
When noise is injected into the other AC power supply line 6 as indicated by a dotted line, the noise is retained by the second capacitor 12. Noise that cannot be retained by the second capacitor 12 flows from the AC power supply line 6 to the aluminum base 20, and then flows to the junction c between the first capacitor 11 and the second capacitor 12 via the conduction line 14. Since the junction point c has no potential difference from the points a and b, the noise remains here and the LED does not light up erroneously.
In the above description, “there is no potential difference” means that there is no potential difference (potential difference of 30 to 40 V or less) larger than the magnitude at which the LED 2 is erroneously turned on.

前述の電位差がないことを確認するために、一方のＡＣ電源ライン５に１００Ｖを印加した状態で、接地されているＰＥ点とａ点、ｂ点、ｃ点、ｄ点間の電位差を測定したところ、ａ点が１００Ｖ、ｃ点が９５Ｖ、ｂ点が９６Ｖ、ｄ点が９６Ｖで、電位差がないことが確認された。
同様に、他方のＡＣ電源ライン６に１００Ｖを印加した状態で、ＰＥ点とａ点、ｂ点、ｃ点、ｄ点間の電位差を測定したところａ点が９５Ｖ、ｃ点が９３Ｖ、ｂ点が１００Ｖ、ｄ点が１００Ｖで、電位差がないことが確認された。 In order to confirm that there is no potential difference as described above, the potential difference between the grounded PE point and the points a, b, c, d was measured with 100 V applied to one AC power line 5. However, it was confirmed that the point a was 100V, the point c was 95V, the point b was 96V, the point d was 96V, and there was no potential difference.
Similarly, the potential difference between the PE point and the points a, b, c, and d was measured with 100 V applied to the other AC power line 6. The point a was 95 V, the point c was 93 V, and the point b. Was 100 V, d point was 100 V, and it was confirmed that there was no potential difference.

前述の第１コンデンサ１１の一端を一方のＡＣ電源ライン５に接続する位置は、コンデンサ８が接続した点とＬＥＤ２に接続した点の間で、第２コンデンサ１２の一端を他方のＡＣ電源ライン６に接続する位置も同様である。
また、第１コンデンサ１１の他端、第２コンデンサ１２の他端を導通ライン１４でアルミベース基板１の裏面にそれぞれ電気的に接続しても良い。
前記第１コンデンサ１１と第２コンデンサ１２を同一の静電容量とすることで、ａ点とｂ点との間の電圧を二等分し、ａ点とｃ点との間の電圧と、ｂ点とｃ点との間の電圧が同じになるようにしてある。 The position where one end of the first capacitor 11 is connected to one AC power line 5 is between the point where the capacitor 8 is connected and the point where it is connected to the LED 2, and one end of the second capacitor 12 is connected to the other AC power line 6. The same applies to the position where the connection is made.
Further, the other end of the first capacitor 11 and the other end of the second capacitor 12 may be electrically connected to the back surface of the aluminum base substrate 1 through the conduction line 14.
By making the first capacitor 11 and the second capacitor 12 have the same capacitance, the voltage between the point a and the point b is divided into two equal parts, the voltage between the point a and the point c, and b The voltage between the point and the point c is made the same.

次に、本発明のＬＥＤ照明器具の実施の形態を説明する。
図２に示すように、アルミベース基板１の表面に、ＬＥＤ２、バリスタ７、コンデンサ８、ヒューズ９、抵抗１０、第１コンデンサ１１、第２コンデンサ１２が設けてあると共に、第１端子１５（電圧側）と第２端子１６（０Ｖ側）が設けてある。 Next, an embodiment of the LED lighting apparatus of the present invention will be described.
As shown in FIG. 2, an LED 2, a varistor 7, a capacitor 8, a fuse 9, a resistor 10, a first capacitor 11, and a second capacitor 12 are provided on the surface of the aluminum base substrate 1, and a first terminal 15 (voltage Side) and a second terminal 16 (0V side).

前記アルミベース基板１は図３に示すように、アルミベース（アルミの板）２０の表面に絶縁層２１を設け、その絶縁層２１の上に電源パターン２２を設けてある。
そして、電源パターン２２にパット２３を介して前述の部材を電気的に導通して設け、その電源パターン２２を絶縁コート（ソルダーレジスト）２４で被覆してある。 As shown in FIG. 3, the aluminum base substrate 1 is provided with an insulating layer 21 on the surface of an aluminum base (aluminum plate) 20, and a power pattern 22 is provided on the insulating layer 21.
The power supply pattern 22 is provided by electrically connecting the above-described members via a pad 23, and the power supply pattern 22 is covered with an insulating coat (solder resist) 24.

前記アルミベース２０の裏面に、電気絶縁性と熱伝導性に優れた部材、例えば絶縁放熱シート４が設けてある。
第１端子１５（電圧側）に一方のＡＣ電源ライン５が接続し、第２端子１６（０Ｖ側）に他方のＡＣ電源ライン６が接続する。
第１端子１５が第１の電源パターン２２ａでヒューズ９を経てＬＥＤ２の一端２ａに電気的に導通し、第２端子１６が第２の電源パターン２２ｂで抵抗１０を経てＬＥＤ２の他端２ｂに電気的に導通している。
前記第１の電源パターン２２ａと第２の電源パター２２ｂに跨ってバリスタ７、コンデンサ８が電気的に導通して設けられ、第１コンデンサ１１、第２コンデンサ１２の一端が第１・第２の電源パターン２２ａ，２２ｂに電気的に導通して設けてある。
前記アルミベース基板１の絶縁層２１におけるＬＥＤ２を取り付ける部分に、放熱用の部材、例えば銅プレート２ｃが設けてある。
この銅プレート２ｃにＬＥＤ２の裏面を接してＬＥＤ２をアルミベース基板１に取り付け、ＬＥＤ２から発生した熱をアルミベース２０に伝わり易くしている。 On the back surface of the aluminum base 20, a member having excellent electrical insulation and thermal conductivity, for example, an insulating heat radiating sheet 4 is provided.
One AC power line 5 is connected to the first terminal 15 (voltage side), and the other AC power line 6 is connected to the second terminal 16 (0 V side).
The first terminal 15 is electrically connected to the one end 2a of the LED 2 via the fuse 9 by the first power supply pattern 22a, and the second terminal 16 is electrically connected to the other end 2b of the LED 2 via the resistor 10 by the second power supply pattern 22b. Is conductive.
A varistor 7 and a capacitor 8 are electrically connected across the first power supply pattern 22a and the second power supply pattern 22b, and one ends of the first capacitor 11 and the second capacitor 12 are connected to the first and second capacitors. The power supply patterns 22a and 22b are electrically connected.
A heat-dissipating member, for example, a copper plate 2c is provided at a portion where the LED 2 is attached to the insulating layer 21 of the aluminum base substrate 1.
The copper plate 2c is in contact with the back surface of the LED 2 so that the LED 2 is attached to the aluminum base substrate 1 so that heat generated from the LED 2 is easily transmitted to the aluminum base 20.

前記第１コンデンサ１１の他端と第２コンデンサ１２の他端を接続する第３の電源パターン２２ｃ（アルミベース基板１の表面）とアルミベース基板１の裏面であるアルミベース２０を導通手段３０で電気的に接続（導通）し、アルミベース基板１の表面側と裏面側との電位差がないようにしている。つまり、同電位としている。
前記導通手段３０は、第３の電源パターン２２ｃ、絶縁層２１、アルミベース２０に孔３１，３２，３３を連通するように同芯状に形成し、各孔３１，３２，３３にボルト３４を挿通し、そのボルト３４にナット３５を螺合することで、第３の電源パターン２２ｃ、絶縁層２１、アルミベース２０をボルト、ナットで挟着支持するようにしてある。 The third power supply pattern 22c (the surface of the aluminum base substrate 1) connecting the other end of the first capacitor 11 and the other end of the second capacitor 12 and the aluminum base 20 which is the back surface of the aluminum base substrate 1 are connected by the conduction means 30. Electrical connection (conduction) is made so that there is no potential difference between the front surface side and the back surface side of the aluminum base substrate 1. That is, they are at the same potential.
The conducting means 30 is formed concentrically so that the holes 31, 32, 33 communicate with the third power supply pattern 22c, the insulating layer 21, and the aluminum base 20, and a bolt 34 is provided in each of the holes 31, 32, 33. The third power supply pattern 22c, the insulating layer 21, and the aluminum base 20 are clamped and supported by bolts and nuts by inserting and nuts 35 screwed into the bolts 34.

前述のように、アルミベース基板１にＬＥＤ２、第１・第２コンデンサ１１，１２を設けたので、そのアルミベース基板１の第１・第２端子１５，１６にＡＣ電源ライン５，６を接続するだけでＬＥＤ２を点灯することができ、ＬＥＤ照明器具が小型で持ち運びし易く、しかも任意の機器本体に簡単に取り付けできる。   As described above, since the LED 2 and the first and second capacitors 11 and 12 are provided on the aluminum base substrate 1, the AC power supply lines 5 and 6 are connected to the first and second terminals 15 and 16 of the aluminum base substrate 1. The LED 2 can be turned on simply by doing so, and the LED lighting apparatus is small and easy to carry, and can be easily attached to any device body.

例えば、図４に示すように、アルミのランプケース４０の内面に絶縁放熱シート４を介してアルミベース基板１の裏面を接して取り付け、アルミベース基板１の透孔１ａから取付ねじ４１をランプケース４０に螺合して取り付ける。
そして、前記ランプケース４０をレンジフードのフード本体４２に固着して取り付ける。４３は透光性のカバーである。
つまり、ランプケース４０とフード本体４２が機器本体である。
前述のように取付ねじ４１でアルミベース基板１をランプケース４０に取り付けるときには、その取付ねじ４１によってアルミベース基板１とランプケース４０が電気的に導通しないようにしている。
例えば、アルミベース基板１の透孔１ａに、絶縁材によって作製した鍔付き筒状のスペーサ４４を挿通し、このスペーサ４４に取付ねじ４１を挿通することで、取付ねじ４１がアルミベース基板１に接触しないようにする。 For example, as shown in FIG. 4, the back surface of the aluminum base substrate 1 is attached to the inner surface of an aluminum lamp case 40 via an insulating heat-dissipating sheet 4, and mounting screws 41 are inserted from the through holes 1 a of the aluminum base substrate 1. Screw onto 40 and attach.
The lamp case 40 is fixedly attached to the hood main body 42 of the range hood. 43 is a translucent cover.
That is, the lamp case 40 and the hood main body 42 are device main bodies.
As described above, when the aluminum base substrate 1 is attached to the lamp case 40 with the attachment screw 41, the attachment screw 41 prevents the aluminum base substrate 1 and the lamp case 40 from being electrically connected.
For example, a flanged cylindrical spacer 44 made of an insulating material is inserted into the through hole 1 a of the aluminum base substrate 1, and the mounting screw 41 is inserted into the spacer 44 so that the mounting screw 41 is inserted into the aluminum base substrate 1. Avoid contact.

前記導通手段３０は、図５に示すように、ねじ３６を孔３１，３２を通してアルミベース２０のねじ穴３７に螺合するようにしても良い。
また、導通手段３０は、図６に示すようにスルーホール３８としても良い。
また、導通手段３０は、図示しないリベットとしても良い。
つまり、導通手段３０は第３の電源パターン２２ｃとアルミベース２０を電気的に導通する構成であれば良い。 As shown in FIG. 5, the conducting means 30 may be configured such that a screw 36 is screwed into a screw hole 37 of the aluminum base 20 through holes 31 and 32.
Further, the conduction means 30 may be a through hole 38 as shown in FIG.
Further, the conduction means 30 may be a rivet (not shown).
That is, the conduction means 30 may be configured to electrically connect the third power supply pattern 22c and the aluminum base 20.

１…アルミベース基板、２…ＬＥＤ、３…ＬＥＤ照明部、４…絶縁放熱シート、５…一方のＡＣ電源ライン、６…他方のＡＣ電源ライン、７…バリスタ、８…コンデンサ、９…ヒューズ、１０…抵抗、１１…第１コンデンサ、１２…第２コンデンサ、１３…接続ライン、１４…導通ライン、１５…第１端子、１６…第２端子、２０…アルミベース、２１…絶縁層、２２…電源パターン。   DESCRIPTION OF SYMBOLS 1 ... Aluminum base board, 2 ... LED, 3 ... LED illumination part, 4 ... Insulation heat radiation sheet, 5 ... One AC power supply line, 6 ... The other AC power supply line, 7 ... Varistor, 8 ... Capacitor, 9 ... Fuse, DESCRIPTION OF SYMBOLS 10 ... Resistance, 11 ... 1st capacitor, 12 ... 2nd capacitor, 13 ... Connection line, 14 ... Conduction line, 15 ... 1st terminal, 16 ... 2nd terminal, 20 ... Aluminum base, 21 ... Insulating layer, 22 ... Power pattern.

Claims (2)

アルミベース２０の表面に絶縁層２１を設け、この絶縁層２１の上に電源パターン２２を設けたアルミベース基板１と、前記絶縁層２１の表面に設けたＬＥＤ２と、前記絶縁層２１の表面に設けた同一の静電容量の第１コンデンサ１１、第２コンデンサ１２を有し、
前記ＬＥＤ２の一端と前記第１コンデンサ１１の一端は、前記電源パターン２２で電気的に導通し、
前記ＬＥＤ２の他端と前記第２コンデンサ１２の一端は、前記電源パターン２２で電気的に導通し、
前記第１コンデンサ１１の他端と前記第２コンデンサ１２の他端は、前記電源パターン２２で電気的に導通し、この電源パターン２２の前記第１コンデンサ１１の他端と前記第２コンデンサ１２の他端の中間は、前記アルミベース２０の裏面に導通手段３０で電気的に導通し、
前記アルミベース基板１の前記アルミベース２０の裏面を電気絶縁性及び熱伝導性に優れた部材を介在して、接地された機器本体に取り付けるようにし、
前記ＬＥＤ２の一端は一方の電源ライン５に接続し、前記ＬＥＤ２の他端は他方の電源ライン６に接続するようにしたことを特徴とするＬＥＤ照明器具。 An insulating layer 21 is provided on the surface of the aluminum base 20, an aluminum base substrate 1 provided with a power supply pattern 22 on the insulating layer 21, an LED 2 provided on the surface of the insulating layer 21, and a surface of the insulating layer 21. A first capacitor 11 and a second capacitor 12 having the same electrostatic capacitance provided;
One end of the LED 2 and one end of the first capacitor 11 are electrically connected by the power pattern 22,
The other end of the LED 2 and one end of the second capacitor 12 are electrically connected by the power pattern 22,
The other end of the first capacitor 11 and the other end of the second capacitor 12 are electrically connected by the power supply pattern 22, and the other end of the first capacitor 11 and the second capacitor 12 of the power supply pattern 22 are connected. The middle of the other end is electrically conducted by the conducting means 30 to the back surface of the aluminum base 20,
The back surface of the aluminum base 20 of the aluminum base substrate 1 is attached to a grounded device body through a member having excellent electrical insulation and thermal conductivity ,
One end of the LED 2 is connected to one power line 5, and the other end of the LED 2 is connected to the other power line 6. 前記アルミベース２０の裏面を絶縁放熱シート４を介在して、接地された機器本体に取り付けるようにした請求項１記載のＬＥＤ照明器具。
The LED lighting apparatus according to claim 1, wherein the back surface of the aluminum base 20 is attached to a grounded device body with an insulating heat radiating sheet 4 interposed therebetween.
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