JP2006236708A - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device Download PDF

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Publication number
JP2006236708A
JP2006236708A JP2005048024A JP2005048024A JP2006236708A JP 2006236708 A JP2006236708 A JP 2006236708A JP 2005048024 A JP2005048024 A JP 2005048024A JP 2005048024 A JP2005048024 A JP 2005048024A JP 2006236708 A JP2006236708 A JP 2006236708A
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case
discharge lamp
lighting device
lamp lighting
lighting circuit
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Junichi Hasegawa
純一 長谷川
Yoji Konishi
洋史 小西
Akihiro Kishimoto
晃弘 岸本
Hiroshi Watanabe
浩士 渡邊
Katsuyoshi Nakada
克佳 中田
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device having raised heat dissipation which is supplied electric power from a DC power source, and turns on a discharge lamp used for a light source of a projector or a rear projection television. <P>SOLUTION: The discharge lamp lighting device includes a lighting circuit block 1 with circuit components 3 of the lighting circuit on a mother board 2a for supplying the electric power from the DC to the discharge lamp, and a case 4 which contains the lighting circuit block 1 in its inside. The case 4 consists of a longwise boxy body 5 having an opening on its top, and a cover 6 which is attached to the opening to cover it. In the inside of the body 5, insulating filler 7 with good heat conductivity is filled in such a way that it covers at least the circuit components 3 of the lighting circuit. Consequently, the heat generated by heat generating components is conducted via the filler 7, and the high temperatures of the heat generating components can be reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、放電灯、特に、直流電源から電源供給を受けて、プロジェクタやリアプロジェクションテレビの光源に用いられる放電灯を点灯させる放電灯点灯装置に関するものである。   The present invention relates to a discharge lamp, and more particularly, to a discharge lamp lighting device for lighting a discharge lamp used as a light source for a projector or a rear projection television by receiving power from a DC power source.

近年、液晶テレビやプラズマテレビなどの薄型テレビが普及しつつあり、特に大画面の薄型テレビの需要が高まっている。しかしながら、現在の技術では大画面の液晶テレビやプラズマテレビはまだ高価であり、画質の向上したプロジェクタの技術を利用した安価なリアプロジェクションテレビの需要が北米を中心に高まっている。   In recent years, thin televisions such as liquid crystal televisions and plasma televisions have become widespread, and in particular, the demand for large-screen thin televisions is increasing. However, large screen LCD televisions and plasma televisions are still expensive with the current technology, and the demand for inexpensive rear projection televisions using projector technology with improved image quality is increasing mainly in North America.

ところでプロジェクタの優位性を決める評価基準の1つに大きさがあり、そのためプロジェクタの小型化が図られてきた。一般的にプロジェクタは、放電灯を有するランプユニット、光学ユニット、制御ボード、電源ユニット、放電灯点灯装置などの部品で構成されており、各部品のレイアウトを決定する上で放電灯点灯装置の優先順位は低く、先ず放電灯点灯装置以外の部品を配置した後で、余ったスペースに放電灯始動装置を配置するというような設計手法が採られていた(例えば特許文献1参照)。   By the way, there is a size as one of evaluation criteria for determining the superiority of the projector, and thus the projector has been downsized. In general, a projector is composed of components such as a lamp unit having a discharge lamp, an optical unit, a control board, a power supply unit, and a discharge lamp lighting device, and priority is given to the discharge lamp lighting device in determining the layout of each component. The order is low, and a design technique has been adopted in which components other than the discharge lamp lighting device are first arranged, and then the discharge lamp starting device is arranged in a surplus space (see, for example, Patent Document 1).

なお放電灯点灯装置を電源ユニットと一体化することも考えられるが、以下のような理由で電源ユニットとは別々に構成されている。電源ユニットと放電灯点灯装置のコストを比較すると、電源ユニットは出力電力が一定で同じサイズであれば、共通化が可能で、コストダウンが図れるのに対して、放電灯点灯装置はランプの定格電力が同じであっても、メーカによって仕様が異なるために、共通化が難しく自ずと高価になっていた。電源ユニットと放電灯点灯装置とを同一の基板上に構成すれば、各々を別個のケースに収納する必要がないので全体としては若干の小型化が可能になるが、放電灯点灯装置と同一の基板上に電源ユニットを構成することによって電源ユニットの部分を共通化できなくなるため、トータルコストは若干アップするという問題があった。また別個に構成する場合に比べて1つの部品の大きさとしては大型になるため、部品の配置を検討する際の制約になるという問題があり、電源ユニットと放電灯点灯装置とは別々に構成されていた。
特許第3508764号公報(段落番号[0018]−[0026]、[0042]、及び、第4図)
Although it is possible to integrate the discharge lamp lighting device with the power supply unit, it is configured separately from the power supply unit for the following reason. Comparing the costs of the power supply unit and the discharge lamp lighting device, if the power unit has the same output power and the same size, it can be shared and the cost can be reduced, whereas the discharge lamp lighting device is rated for the lamp. Even if the power is the same, the specifications differ from manufacturer to manufacturer, making it difficult to share and naturally becoming expensive. If the power supply unit and the discharge lamp lighting device are configured on the same substrate, it is not necessary to store each in a separate case, so the overall size can be slightly reduced, but the same as the discharge lamp lighting device. By configuring the power supply unit on the substrate, it becomes impossible to share the power supply unit, so there is a problem that the total cost is slightly increased. In addition, since the size of one component is larger than the case where it is configured separately, there is a problem that it becomes a restriction when considering the arrangement of components, and the power supply unit and the discharge lamp lighting device are configured separately. It had been.
Japanese Patent No. 3508764 (paragraph numbers [0018]-[0026], [0042] and FIG. 4)

上述したプロジェクタやリアプロジェクションテレビ用の放電灯点灯装置も、プロジェクタの更なる小型化に伴って小型化が求められており、回路技術の進歩が有るとは言え、狭いスペースに配置されるために放熱性能を充分に確保することができず、回路部品の温度上昇が増大して、動作が不安定になる可能性があった。   The above-described projectors and discharge lamp lighting devices for rear projection televisions are also required to be miniaturized with further miniaturization of the projector, and even though there are advances in circuit technology, they are arranged in a narrow space. There was a possibility that the heat dissipation performance could not be sufficiently ensured, the temperature rise of the circuit components increased, and the operation became unstable.

本発明は上記問題点に鑑みて為されたものであり、その目的とするところは、放熱性を高めた放電灯点灯装置を提供することにある。   The present invention has been made in view of the above problems, and an object thereof is to provide a discharge lamp lighting device having improved heat dissipation.

上記目的を達成するために、請求項1の発明は、直流電源から電源供給を受けて、放電灯に点灯出力を供給する点灯回路と、当該点灯回路を内部に収納するケースとを備え、ケースの内部に、点灯回路の発熱部品を少なくとも覆う放熱用の樹脂が充填されたことを特徴とする。   In order to achieve the above object, the invention of claim 1 includes a lighting circuit for receiving a power supply from a DC power source and supplying a lighting output to the discharge lamp, and a case for housing the lighting circuit therein. Is filled with a heat-dissipating resin that covers at least the heat-generating component of the lighting circuit.

この発明によれば、ケースの内部に充填された樹脂が、点灯回路の発熱部品を少なくとも覆っているので、発熱部品の熱が樹脂を介して伝導することによって、高温の発熱部品の温度を少しでも下げることができ、回路部品の温度差を小さくして、高温領域の温度を低減することができる。   According to the present invention, since the resin filled in the case covers at least the heat generating component of the lighting circuit, the heat of the heat generating component is conducted through the resin, so that the temperature of the high temperature heat generating component is slightly increased. However, the temperature difference between the circuit components can be reduced and the temperature in the high temperature region can be reduced.

請求項2の発明は、請求項1の発明において、樹脂は、ケースの内部の略全体に充填されたことを特徴とする。   The invention of claim 2 is characterized in that, in the invention of claim 1, the resin is filled in substantially the entire inside of the case.

この発明によれば、ケースの内部の略全体に樹脂を充填しているので、発熱部品の熱が樹脂を介して伝導することによって、放電灯点灯装置全体の温度を均一化することができる。   According to the present invention, since the resin is filled in almost the entire interior of the case, the heat of the heat generating component is conducted through the resin, so that the temperature of the entire discharge lamp lighting device can be made uniform.

請求項3の発明は、請求項1の発明において、樹脂は、ケースの内部に空気が流れる空間を残して充填されており、ケースの内部に送風して点灯回路の発熱部品を空冷する送風手段をケースに設けたことを特徴とする。   According to a third aspect of the present invention, in the first aspect of the present invention, the resin is filled in the case leaving a space for air to flow, and blows air into the case to air-cool the heat generating components of the lighting circuit. Is provided in the case.

この発明によれば、送風手段によりケースの内部に送風することで発熱部品を空冷しているので、放熱性を向上させて、放電灯点灯装置全体の温度上昇をさらに低減することができる。   According to this invention, since the heat generating component is air-cooled by blowing air into the case by the blowing means, it is possible to improve heat dissipation and further reduce the temperature rise of the entire discharge lamp lighting device.

請求項4の発明は、請求項3の発明において、送風手段に、ケースに対して着脱自在に取着するための取付手段を設けたことを特徴とする。   The invention of claim 4 is characterized in that, in the invention of claim 3, attachment means for detachably attaching to the case is provided in the blowing means.

この発明によれば、取付手段により送風手段を必要に応じてケースに取り付けることが可能になる。   According to this invention, it becomes possible to attach a ventilation means to a case as needed by an attachment means.

請求項5の発明は、請求項1乃至4の何れかの発明において、ケースが金属材料で形成され、発熱部品とケースとを熱的に結合したことを特徴とする。   The invention of claim 5 is characterized in that, in the invention of any one of claims 1 to 4, the case is formed of a metal material, and the heat generating component and the case are thermally coupled.

この発明によれば、金属製のケースと発熱部品とを熱的に結合することによって、金属ケースを発熱部品の放熱部材として利用することができ、放熱性をさらに向上させて、放電灯点灯装置全体の温度上昇をさらに低減することが可能になる。しかも点灯回路が金属製のケースに収納されているので、シールド効果が向上するという利点もある。   According to the present invention, the metal case and the heat generating component are thermally coupled to each other, whereby the metal case can be used as a heat radiating member for the heat generating component, further improving the heat dissipation, and the discharge lamp lighting device. It becomes possible to further reduce the overall temperature rise. Moreover, since the lighting circuit is housed in a metal case, there is an advantage that the shielding effect is improved.

本発明によれば、ケースの内部に充填された樹脂が、点灯回路の発熱部品を少なくとも覆っているので、発熱部品の熱が樹脂を介して伝導することによって、高温の発熱部品の温度を少しでも下げることができ、回路部品の温度差を小さくして、高温領域の温度を低減できるという効果がある。   According to the present invention, since the resin filled in the case covers at least the heat generating component of the lighting circuit, the heat of the heat generating component is conducted through the resin, so that the temperature of the high temperature heat generating component is slightly increased. However, there is an effect that the temperature difference between the circuit components can be reduced and the temperature in the high temperature region can be reduced.

以下に本発明の実施の形態を図面に基づいて説明する。
(実施形態1)
本発明の実施形態1を図1〜図5に基づいて説明する。本実施形態の放電灯点灯装置は、例えばプロジェクタやリアプロジェクションテレビの光源に用いられる高輝度放電灯を点灯させるために用いられる。高輝度放電灯を高周波点灯させると音響共鳴現象が発生するので、音響共鳴現象を避けるために、本実施形態の放電灯点灯装置では、例えば直流電源から供給される直流電圧を低周波で交番させた矩形波交流電圧を発生させて、高輝度放電灯を矩形波点灯させている。
Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
Embodiment 1 of this invention is demonstrated based on FIGS. The discharge lamp lighting device of this embodiment is used for lighting a high-intensity discharge lamp used for a light source of a projector or a rear projection television, for example. Since an acoustic resonance phenomenon occurs when a high-intensity discharge lamp is lit at a high frequency, in order to avoid the acoustic resonance phenomenon, in the discharge lamp lighting device of this embodiment, for example, a DC voltage supplied from a DC power source is alternated at a low frequency. A rectangular wave AC voltage is generated to light up the high-intensity discharge lamp in a rectangular wave.

図1(a)は放電灯点灯装置の点灯回路ブロック1を示し、プリント配線板よりなる親基板2aおよび子基板2bには、直流電源から電源供給を受けて図示しない高輝度放電灯に点灯出力を供給する点灯回路の回路部品3,3aがそれぞれ実装されている。   FIG. 1 (a) shows a lighting circuit block 1 of a discharge lamp lighting device. A master board 2a and a sub board 2b made of a printed wiring board are supplied with power from a DC power source and output to a high-intensity discharge lamp (not shown). The circuit components 3 and 3a of the lighting circuit for supplying are respectively mounted.

この点灯回路ブロック1は、図1(b)に示すように非金属材料であるポリカーボネード樹脂やプロピレンカーボネード樹脂のような合成樹脂で形成されたケース4内に収納される。親基板2aには直流電源からの入力線8と、放電灯との間を接続する出力線9とがそれぞれ接続されており、入力線8および出力線9はそれぞれケース4に設けた電線挿通孔を通して外部に導出されている。ここで、図3に示すようにケース4に設けた電線挿通孔に、EPTゴムやシリコン系ゴムのような非金属材料で成型されたブッシング16を取り付けて、ブッシング16の孔に入力線8および出力線9を通すようにしても良く、ランプ始動時に高電圧が発生した場合でも入力線8および出力線9とケース4との間をブッシング16で絶縁することによって、感電などの事故を防止でき、安全性を高めることができる。   The lighting circuit block 1 is housed in a case 4 formed of a synthetic resin such as a polycarbonate resin or a propylene carbonate resin, which is a non-metallic material, as shown in FIG. An input line 8 from a DC power source and an output line 9 for connecting the discharge lamp to each other are connected to the parent board 2a, and the input line 8 and the output line 9 are respectively wire insertion holes provided in the case 4. It is derived to the outside through. Here, as shown in FIG. 3, a bushing 16 molded of a non-metallic material such as EPT rubber or silicon rubber is attached to the electric wire insertion hole provided in the case 4, and the input line 8 and the bushing 16 are inserted into the hole of the bushing 16. The output line 9 may be passed, and even when a high voltage is generated at the time of starting the lamp, the input line 8 and the output line 9 and the case 4 are insulated by the bushing 16 so that an accident such as an electric shock can be prevented. , Can increase safety.

ケース4は、上面が開口した縦長の箱状の合成樹脂製のボディ5と、ボディ5の上面に被着される合成樹脂製のカバー6とを結合して構成される。ボディ5の長手方向に沿う両側壁の上部には各一対の係止孔5aが開口している。一方、カバー6は矩形板状の天板6aと、天板6aの周縁部から下方に突出する側壁6bとを備え、長手方向に沿う側壁6bの内側面には係止爪6cが突設されている。而して側壁6bを下側にして、ボディ5の上側からカバー6を被せると、ボディ5の側壁とカバー6の側壁6bとが弾性的に撓められ、カバー6の係止爪6cがボディ5の係止孔5aに係止することによって、ボディ5とカバー6とが結合される。なお、ボディ5とカバー6とを結合するための構成を上記の構成に限定する趣旨のものではなく、例えば図4に示すようにボディ5の長手方向に沿う両側壁の上部に内側に凹没した係止凹部5bを設けるとともに、カバー6の長手方向に沿う側壁6bに係止凹部5bと係止する係止凸部6dを設け、係止凸部6dを係止凹部5bに凹凸係止させることで、ボディ5とカバー6とを結合しても良い。   The case 4 is configured by connecting a vertically long box-shaped synthetic resin body 5 having an open upper surface and a synthetic resin cover 6 attached to the upper surface of the body 5. A pair of locking holes 5 a are opened at the upper portions of both side walls along the longitudinal direction of the body 5. On the other hand, the cover 6 includes a rectangular plate-shaped top plate 6a and a side wall 6b protruding downward from the peripheral edge of the top plate 6a, and a locking claw 6c projects from the inner side surface of the side wall 6b along the longitudinal direction. ing. Thus, when the cover 6 is covered from the upper side of the body 5 with the side wall 6b on the lower side, the side wall 6b of the body 5 and the side wall 6b of the cover 6 are elastically bent, and the locking claw 6c of the cover 6 is The body 5 and the cover 6 are coupled by being locked in the locking holes 5a of the five. Note that the structure for coupling the body 5 and the cover 6 is not limited to the above-described structure. For example, as shown in FIG. The locking recess 5b is provided, and the side wall 6b along the longitudinal direction of the cover 6 is provided with a locking projection 6d that locks with the locking recess 5b, and the locking projection 6d is locked to the locking recess 5b. Thus, the body 5 and the cover 6 may be combined.

ここで、図1(c)に示すようにボディ5内に点灯回路ブロック1を収納した状態で、ボディ5の内部に発熱部品(スイッチング素子3aなど)を含めた回路部品3の少なくとも一部を覆うレベルまで充填剤7を充填して、固化させている。この充填剤7は熱伝導性が良好な絶縁性の合成樹脂からなり、例えばシリコン系やウレタン系の樹脂を用いることが好ましい。このようにケース4の内部に充填剤7を充填し、この充填剤7で回路部品3を部分的に覆っているので、回路部品3の発する熱が充填剤7を介して伝導することによって、高温の発熱部品(例えばスイッチング素子3aなど)の温度を少しでも下げることができ、回路部品3の温度差を小さくして、高温領域の温度を低減することができる。なお図2に示すように充填剤7が充填されたボディ5内部に点灯回路ブロック1を上下逆さまに収納した後に充填剤7を固化させた場合や、発熱部品だけを覆うように充填剤7を充填した場合でも、発熱部品の温度を低減する効果を得ることが可能である。またケース4の内部の略全体に充填剤7を充填して固化させた場合でも、発熱部品の温度を低減する効果を得ることが可能であり、回路部品3の温度が充填剤7を介して伝導することによって、放電灯点灯装置全体の温度を均一化することができる。   Here, as shown in FIG. 1C, at least a part of the circuit component 3 including the heat generating component (such as the switching element 3a) in the body 5 in a state in which the lighting circuit block 1 is housed in the body 5. Filler 7 is filled to a level to cover and solidified. The filler 7 is made of an insulating synthetic resin having good thermal conductivity, and for example, a silicon-based or urethane-based resin is preferably used. Since the case 7 is filled with the filler 7 and the circuit component 3 is partially covered with the filler 7, the heat generated by the circuit component 3 is conducted through the filler 7, The temperature of the high-temperature heat-generating component (for example, the switching element 3a) can be lowered as much as possible, the temperature difference between the circuit components 3 can be reduced, and the temperature in the high-temperature region can be reduced. As shown in FIG. 2, when the lighting circuit block 1 is stored upside down in the body 5 filled with the filler 7, the filler 7 is solidified, or the filler 7 is covered so as to cover only the heat-generating parts. Even when it is filled, it is possible to obtain an effect of reducing the temperature of the heat generating component. Further, even when the filler 7 is filled almost entirely inside the case 4 and solidified, it is possible to obtain the effect of reducing the temperature of the heat-generating component, and the temperature of the circuit component 3 is reduced via the filler 7. By conducting, the temperature of the entire discharge lamp lighting device can be made uniform.

ところで本実施形態ではケース4を合成樹脂により形成しているが、ケース4(すなわちボディ5およびカバー6)を鉄系、アルミニウム系、銅系、マグネシウム系などの金属材料により形成しても良く、発熱部品(スイッチング素子3aなど)を含めた回路部品3と金属製のケース4とが導電性の良好な充填剤7を介して熱的に結合されるので、ケース4自体を発熱部品の放熱部材として利用することができ、放熱効果を高めて、回路部品3の温度上昇をさらに低減することができる。また点灯回路ブロック1を金属製のケース4の内部に収納しているので、ケース4を接地することによって、シールド効果を持たせることができ、点灯回路ブロック1からの放射ノイズによる悪影響を低減することができる。   By the way, in this embodiment, the case 4 is formed of a synthetic resin. However, the case 4 (that is, the body 5 and the cover 6) may be formed of a metal material such as iron, aluminum, copper, or magnesium. Since the circuit component 3 including the heat generating component (such as the switching element 3a) and the metal case 4 are thermally coupled through the filler 7 having good conductivity, the case 4 itself is connected to the heat radiating member of the heat generating component. The heat dissipation effect can be enhanced and the temperature rise of the circuit component 3 can be further reduced. Further, since the lighting circuit block 1 is housed in the metal case 4, the shielding effect can be provided by grounding the case 4, and the adverse effect due to the radiation noise from the lighting circuit block 1 is reduced. be able to.

また図5に示すように、金属製のケース4(ボディ5およびカバー6)にケース4の内外をそれぞれ連通する複数の通気孔10を貫設しても良く、回路部品3の発熱によって暖められたケース4内部の空気を通気孔10を通して外部に逃がすことで、ケース4内部の空気を対流させることができ、放電灯点灯装置の温度上昇をさらに低減することができる。なおこの場合は通気孔10を通して入力線8や出力線9をケース4の外側に導出すれば良い。また点灯回路ブロック1が、出力特性を調整するために可変抵抗器などの調整部品を備えている場合は、通気孔10にマイナスドライバなどの治具の先端を通して調整作業を行うことができ、通気孔10を電線挿通孔や治具の挿通孔として利用することができる。なお通気孔10を設けた場合は、ケース4の外面に蓋板(図示せず)を当てて通気孔10を塞いだ状態で充填剤7を充填して固化させた後、蓋板を外せば良い。   Further, as shown in FIG. 5, a plurality of vent holes 10 communicating with the inside and the outside of the case 4 may be provided in the metal case 4 (the body 5 and the cover 6). By letting the air inside the case 4 escape to the outside through the vent hole 10, the air inside the case 4 can be convected and the temperature rise of the discharge lamp lighting device can be further reduced. In this case, the input line 8 and the output line 9 may be led out of the case 4 through the vent hole 10. Further, when the lighting circuit block 1 includes an adjustment component such as a variable resistor for adjusting the output characteristics, the adjustment work can be performed through the vent hole 10 through the tip of a jig such as a minus driver. The air holes 10 can be used as electric wire insertion holes or jig insertion holes. When the vent hole 10 is provided, a lid plate (not shown) is applied to the outer surface of the case 4 so that the vent hole 10 is closed, the filler 7 is filled and solidified, and then the lid plate is removed. good.

また図6(a)に示すように、ボディ5の短幅方向に沿う両側壁の下側部から、それぞれねじ挿通孔11を有する各一対の脚片12を延出させても良く、各脚片12のねじ挿通孔11に通した固定ねじ13を、プロジェクタやリアプロジェクションテレビなどの筐体内の被固定部に設けたねじ部に螺合することで、ケース4を被固定部に容易にねじ固定することができ、また固定ねじ13を用いて筐体にねじ固定することで、金属製のケース4を筐体のアース端子に接地することができ、ケース4によるシールド効果をさらに高めることができる。   Further, as shown in FIG. 6A, a pair of leg pieces 12 each having a screw insertion hole 11 may be extended from the lower side of both side walls along the short width direction of the body 5, The case 4 is easily screwed into the fixed portion by screwing the fixing screw 13 passed through the screw insertion hole 11 of the piece 12 into a screw portion provided in the fixed portion in a housing such as a projector or a rear projection television. The metal case 4 can be grounded to the ground terminal of the housing by fixing the screw to the housing using the fixing screw 13, and the shielding effect of the case 4 can be further enhanced. it can.

またケース4への親基板2aの取付構造を図6(b)(c)に示すような取付構造としても良い。すなわちボディ5の長手方向両端部の底板には、底板の四隅をそれぞれ上側に突出させることによって取付座14を設けてあり、親基板2aの四隅に設けた透孔に取付ねじ15を通して、取付座14のねじ孔に螺合することによって親基板2aがボディ5にねじ固定されている。このとき親基板2aの四隅がケース4に確実に位置決めされるとともに、親基板2aの裏面に形成したグランドパターン2cが金属製のケース4の筐体アースに電気的に接続されるので、シールド効果をさらに高めることができる。   Moreover, the attachment structure of the parent substrate 2a to the case 4 may be an attachment structure as shown in FIGS. That is, the base plate at both ends in the longitudinal direction of the body 5 is provided with mounting seats 14 by projecting the four corners of the base plate upward, and through the mounting screws 15 through the through holes provided at the four corners of the main board 2a. The parent substrate 2a is screwed to the body 5 by being screwed into the 14 screw holes. At this time, the four corners of the main board 2a are surely positioned in the case 4, and the ground pattern 2c formed on the back surface of the main board 2a is electrically connected to the housing ground of the metal case 4, so that the shielding effect is achieved. Can be further enhanced.

なお親基板2aのケース4への取付構造を上記の構造に限定する趣旨のものではなく、他の取付構造を採用しても良い。例えば図7に示すように、ケース4を、一方の側面が開口した縦長の略箱状のボディ5’と、このボディ5’の開口を塞ぐようにしてボディ5’に被着されるカバー6’とで構成し、カバー6’をボディ5’の開口に被着し、カバー6’の係止爪17をボディ5’の係止孔18に係止させることでカバー6’とボディ5’とを結合する。ここで、ボディ5’の長手方向に沿う両側壁の内側面にはレール溝19,19がそれぞれ形成されており、親基板2aの両側縁をそれぞれレール溝19,19内に係入させ、レール溝19,19に沿って親基板2aをスライド移動させることで、親基板2aをボディ5’内に位置決めした後、ボディ5’の開口部にカバー6’を固定することで、親基板2aをケース4内に保持させることができる。なお親基板2aに接続された出力線9はカバー6’に設けた電線挿通孔20から外部に導出され、入力線8についてもボディ5’に設けた電線挿通孔(図示せず)から外部に導出されている。   The attachment structure of the parent substrate 2a to the case 4 is not limited to the above structure, and other attachment structures may be adopted. For example, as shown in FIG. 7, a case 4 includes a vertically long and substantially box-shaped body 5 ′ opened on one side surface, and a cover 6 attached to the body 5 ′ so as to close the opening of the body 5 ′. The cover 6 'is attached to the opening of the body 5', and the locking claw 17 of the cover 6 'is locked in the locking hole 18 of the body 5', thereby covering the cover 6 'and the body 5'. And combine. Here, rail grooves 19, 19 are formed on the inner side surfaces of both side walls along the longitudinal direction of the body 5 ', and both side edges of the parent substrate 2a are engaged with the rail grooves 19, 19, respectively. After the parent substrate 2a is slid along the grooves 19 and 19, the parent substrate 2a is positioned in the body 5 ′, and then the cover 6 ′ is fixed to the opening of the body 5 ′. It can be held in the case 4. The output line 9 connected to the parent board 2a is led out from the electric wire insertion hole 20 provided in the cover 6 ′, and the input line 8 is also connected to the outside from the electric wire insertion hole (not shown) provided in the body 5 ′. Has been derived.

(実施形態2)
本発明の実施形態2を図8(a)(b)に基づいて説明する。上述した実施形態1では合成樹脂製または金属製のケース4内に点灯回路ブロック1を収納するとともに、ケース4内に充填剤7を充填しているのに対して、本実施形態ではケース4の内部に空気の流れる空間を残して充填剤7を充填するとともに、ケース4内部に送風して点灯回路の発熱部品を空冷する送風ファン21(送風手段)をケース4に取り付けてある。なお送風ファン21以外の構成は実施形態1と同様であるので、共通する構成要素には同一の符号を付して、その説明は省略する。
(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the lighting circuit block 1 is housed in the synthetic resin or metal case 4 and the case 4 is filled with the filler 7, whereas in the present embodiment, the case 4 An air blowing fan 21 (air blowing means) is attached to the case 4 to fill the filler 7 while leaving a space for air to flow inside and to blow air into the case 4 to air-cool the heat generating components of the lighting circuit. Since the configuration other than the blower fan 21 is the same as that of the first embodiment, common components are denoted by the same reference numerals, and description thereof is omitted.

ケース4はボディ5とカバー6とを結合して構成され、ケース4の長手方向において対向する両側面は開口している。このケース4の内部に点灯回路ブロック1を収納し、両側の開口部に蓋板(図示せず)を当てて開口部を塞いだ状態で、ケース4の内部に充填剤7を充填して固化した後、蓋板を外すことで、ケース4内部に空気の流路を設けた状態で充填剤7が充填される。そして、このケース4の長手方向一端部には送風ファン21が着脱自在に取着される。送風ファン21は枠体22の中央に回転羽根23を回転自在に保持させてあり、枠体22の四隅に設けた挿通孔24に固定ねじ26を挿通し、各固定ねじ26をケース4の長手方向一端側に設けた取付片25のねじ孔に螺合することで、送風ファン21がケース4にねじ固定される。ここに固定ねじ26および取付片25などから、送風ファン21をケース4に対して着脱自在に取り付ける取付手段が構成される。なお枠体22からは回転羽根23を回転させるモータ(図示せず)に電源を供給するための電源線30が導出されており、この電源線30の端末に結線されたコネクタ29を点灯回路ブロック1に接続することで、モータに電源が供給されて、回転羽根23が回転する。   The case 4 is configured by combining a body 5 and a cover 6, and both side surfaces facing each other in the longitudinal direction of the case 4 are open. The lighting circuit block 1 is housed inside the case 4, and a lid 7 (not shown) is applied to the openings on both sides to close the openings. After that, by removing the cover plate, the filler 7 is filled with the air flow path provided inside the case 4. A blower fan 21 is detachably attached to one end of the case 4 in the longitudinal direction. The blower fan 21 has a rotating blade 23 rotatably held at the center of the frame body 22, and fixing screws 26 are inserted into insertion holes 24 provided at four corners of the frame body 22. The blower fan 21 is screwed to the case 4 by being screwed into a screw hole of the mounting piece 25 provided on one end side in the direction. Here, the fixing means for attaching the blower fan 21 to the case 4 in a detachable manner is constituted by the fixing screw 26 and the attachment piece 25. A power line 30 for supplying power to a motor (not shown) for rotating the rotary blade 23 is led out from the frame body 22, and a connector 29 connected to a terminal of the power line 30 is connected to a lighting circuit block. By connecting to 1, power is supplied to the motor, and the rotating blade 23 rotates.

このように本実施形態ではケース4に対して送風ファン21を取り付けてあり、送風ファン21によりケース4内部に風を送り込むことで、温度上昇をさらに低減することができる。また送風ファン21はケース4に対して着脱自在に取り付けられているので、状況に応じて送風ファン21を取り外すことが可能であり、送風ファン21を使用しない場合には送風ファン21の代わりに側面カバー27を取り付けて、ケース4の側面の開口を閉塞する。側面カバー27は矩形板状であって、四隅に設けた挿通孔28に固定ねじ26を挿通し、固定ねじ26をケース4の取付片25に設けたねじ孔に螺合することで、送風ファン21と同様に取り付けることが可能である。   As described above, in the present embodiment, the blower fan 21 is attached to the case 4, and the temperature rise can be further reduced by sending air into the case 4 by the blower fan 21. Further, since the blower fan 21 is detachably attached to the case 4, the blower fan 21 can be removed depending on the situation. When the blower fan 21 is not used, a side surface is used instead of the blower fan 21. A cover 27 is attached to close the opening on the side surface of the case 4. The side cover 27 has a rectangular plate shape, and the fixing screw 26 is inserted into the insertion holes 28 provided at the four corners, and the fixing screw 26 is screwed into the screw holes provided in the mounting piece 25 of the case 4. It can be attached in the same way as 21.

なお、本発明の精神と範囲に反することなしに、広範に異なる実施形態を構成することができることは明白なので、この発明は、特定の実施形態に制約されるものではない。   It should be noted that a wide variety of different embodiments can be configured without departing from the spirit and scope of the present invention, and the present invention is not limited to a specific embodiment.

実施形態1の放電灯点灯装置を示し、(a)は一部省略せる外観斜視図、(b)は充填剤を充填する前の分解斜視図、(c)は充填剤を充填した後の分解斜視図である。1 shows a discharge lamp lighting device according to Embodiment 1, wherein (a) is a perspective view that can be partially omitted, (b) is an exploded perspective view before filling with a filler, and (c) is an exploded perspective after filling with a filler. It is a perspective view. 同上の他の構成を示す分解斜視図である。It is a disassembled perspective view which shows the other structure same as the above. 同上の別の構成を示す外観斜視図である。It is an external appearance perspective view which shows another structure same as the above. 同上を示し、図1(c)のA−A断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG. 同上のまた別の構成を示す外観斜視図である。It is an external appearance perspective view which shows another structure same as the above. (a)(b)は同上の他の構成を示す外観斜視図、(c)は要部拡大断面図である。(A) (b) is an external appearance perspective view which shows the other structure same as the above, (c) is a principal part expanded sectional view. 同上のさらに別の構成を示す分解斜視図である。It is a disassembled perspective view which shows another structure same as the above. 実施形態2の放電灯点灯装置を示し、(a)は外観斜視図、(b)は分解斜視図である。The discharge lamp lighting device of Embodiment 2 is shown, (a) is an external perspective view, (b) is an exploded perspective view.

符号の説明Explanation of symbols

1 点灯回路ブロック
2a 親基板
3 回路部品
4 ケース
5 ボディ
6 カバー
7 充填剤
DESCRIPTION OF SYMBOLS 1 Lighting circuit block 2a Parent board 3 Circuit components 4 Case 5 Body 6 Cover 7 Filler

Claims (5)

直流電源から電源供給を受けて、放電灯に点灯出力を供給する点灯回路と、当該点灯回路を内部に収納するケースとを備え、前記ケースの内部に、前記点灯回路の発熱部品を少なくとも覆う放熱用の樹脂が充填されたことを特徴とする放電灯点灯装置。   A lighting circuit that receives a power supply from a DC power source and supplies a lighting output to the discharge lamp, and a case that houses the lighting circuit therein, and radiates heat that covers at least the heat-generating component of the lighting circuit inside the case. Discharge lamp lighting device characterized in that it is filled with resin for use. 前記樹脂は、前記ケースの内部の略全体に充填されたことを特徴とする請求項1記載の放電灯点灯装置。   The discharge lamp lighting device according to claim 1, wherein the resin is filled in substantially the entire interior of the case. 前記樹脂は、前記ケースの内部に空気が流れる空間を残して充填されており、前記ケースの内部に送風して前記点灯回路の発熱部品を空冷する送風手段を前記ケースに設けたことを特徴とする請求項1記載の放電灯点灯装置。   The resin is filled with leaving a space for air to flow inside the case, and the case is provided with a blowing means for blowing air inside the case to air-cool the heat generating components of the lighting circuit. The discharge lamp lighting device according to claim 1. 前記送風手段に、前記ケースに対して着脱自在に取着するための取付手段を設けたことを特徴とする請求項3記載の放電灯点灯装置。   4. The discharge lamp lighting device according to claim 3, wherein the blower means is provided with attachment means for detachably attaching to the case. 前記ケースが金属材料で形成され、前記発熱部品と前記ケースとを熱的に結合したことを特徴とする請求項1乃至4の何れかに記載の放電灯点灯装置。
The discharge lamp lighting device according to any one of claims 1 to 4, wherein the case is made of a metal material, and the heat generating component and the case are thermally coupled.
JP2005048024A 2005-02-23 2005-02-23 Discharge lamp lighting device Withdrawn JP2006236708A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011171154A (en) * 2010-02-19 2011-09-01 Denso Corp Circuit housing unit and discharge lamp unit
KR102136412B1 (en) * 2019-02-07 2020-07-21 (주)창조코프레이션 Power supply unit of led lighting fixtures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011171154A (en) * 2010-02-19 2011-09-01 Denso Corp Circuit housing unit and discharge lamp unit
KR102136412B1 (en) * 2019-02-07 2020-07-21 (주)창조코프레이션 Power supply unit of led lighting fixtures

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