JP2019207778A

JP2019207778A - Emergency lighting device and emergency illumination device

Info

Publication number: JP2019207778A
Application number: JP2018101786A
Authority: JP
Inventors: 将武山下; Masatake Yamashita; 竜介山口; Ryusuke Yamaguchi
Original assignee: Iwasaki Denki KK
Current assignee: Iwasaki Denki KK
Priority date: 2018-05-28
Filing date: 2018-05-28
Publication date: 2019-12-05

Abstract

To provide an emergency lighting device that securely inhibits inrush current to a light emitter from a regular use lighting circuit connected at the time of power recovery after outage.SOLUTION: An emergency lighting device 1 comprises: an emergency lighting circuit 10 capable of supplying power from a backup power supply 17 to a light emitter 2; a regular use lighting circuit 20 capable of supplying power from an external power supply to the light emitter 2; a power supply detection circuit 30 that outputs an outage signal according to outage of the external power supply and outputs a power supply recovery signal according to power supply recovery from the outage; a changeover unit 50 that connects the emergency lighting circuit 10 to the light emitter 2 according to a signal S1 and connects the regular use lighting circuit 20 to the light emitter 2 according to a signal S2; a switch 60 that makes the regular use lighting circuit 20 stop the output operation when receiving a signal S3 and makes the regular use lighting circuit 20 execute the output operation when receiving a signal S4; and a control circuit 40 that outputs the signal S1 and the signal S3 according to the outage signal, changes the signal S1 to the signal S2 at predetermined time according to the power supply recovery signal, and changes the signal S3 to the signal S4 after the predetermined time.SELECTED DRAWING: Figure 1

Description

本発明は、非常用点灯装置及びそれを用いた非常用照明装置に関する。 The present invention relates to an emergency lighting device and an emergency lighting device using the same.

特許文献１の点灯装置では、発光素子の前段にリレーが接続される。このリレーによって、外部電源の停電時に発光素子に対して非常用点灯ユニットが接続され、外部電源の停電からの復帰時に発光素子に対して常用点灯回路が接続される。非常用点灯ユニットに設けられた制御回路が、非常用点灯ユニットの電源入力状態に応じてリレーを切り替える。 In the lighting device disclosed in Patent Document 1, a relay is connected in front of the light emitting element. By this relay, the emergency lighting unit is connected to the light emitting element when the external power supply is interrupted, and the normal lighting circuit is connected to the light emitting element when the external power supply is recovered from the power failure. A control circuit provided in the emergency lighting unit switches the relay according to the power input state of the emergency lighting unit.

特許文献２の非常用点灯装置では、常用点灯回路が、外部電源によって発光素子を点灯させるとともに、出力側の電圧が所定の電圧以上になると電流の出力を低下又は停止させる保護動作を行う。着脱検出回路が、常用点灯回路の出力側に対する発光素子の接続の有無を検出する。着脱検出回路は、外部電源の停電からの復帰時に発光素子の接続を検出したときに、常用点灯回路の保護動作を解除する。 In the emergency lighting device of Patent Document 2, the regular lighting circuit lights a light emitting element with an external power source, and performs a protective operation to reduce or stop the output of a current when the output side voltage exceeds a predetermined voltage. The attachment / detachment detection circuit detects whether or not the light emitting element is connected to the output side of the regular lighting circuit. The attachment / detachment detection circuit cancels the protection operation of the regular lighting circuit when the connection of the light emitting element is detected upon recovery from a power failure of the external power supply.

特開２０１６−１１５６０４号公報Japanese Patent Laying-Open No. 2006-115604 特開２０１５−２１６００９号公報JP2015-216209A

ところで、特許文献１のような常用点灯回路においては、外部電源の電源復帰時に出力側が無負荷となる場合には、例えば内部のフィードバック回路の作用によって出力電圧は上限値に固定された状態で保持される。この状態から、常用点灯回路がＬＥＤなどの発光素子に接続されると、発光素子に突入電流が流れ、発光素子が故障又は短寿命化する可能性がある。特許文献２の構成は、無負荷状態において出力を低減させるので、上記の問題を解消できそうである。しかし、外部電源の電源復帰時に常用点灯回路が発光素子に接続される時点で出力電圧が発光素子（ＬＥＤ）の順方向電圧Ｖｆ未満である場合には無負荷状態が検出され得る。したがって、無負荷検出及び保護動作にマスクなどの複雑な制御が設けられない場合には常用点灯回路が通常出力動作にスムーズに移行しない可能性がある。 By the way, in the regular lighting circuit as in Patent Document 1, when the output side becomes no load when the power of the external power supply is restored, the output voltage is held in a state where the output voltage is fixed to the upper limit value by the action of the internal feedback circuit, for example. Is done. From this state, when the regular lighting circuit is connected to a light emitting element such as an LED, an inrush current flows through the light emitting element, which may cause the light emitting element to fail or have a short life. Since the configuration of Patent Document 2 reduces the output in a no-load state, it seems that the above problem can be solved. However, a no-load state can be detected if the output voltage is less than the forward voltage Vf of the light emitting element (LED) at the time when the regular lighting circuit is connected to the light emitting element when the external power supply is restored. Therefore, when complicated control such as a mask is not provided for the no-load detection and protection operation, the normal lighting circuit may not smoothly shift to the normal output operation.

そこで、本発明は、停電後の電源復帰時に接続される常用点灯回路から発光素子への突入電流を簡素な構成で確実に抑制することができる非常用点灯装置及び非常用照明装置を提供することを課題とする。 Therefore, the present invention provides an emergency lighting device and an emergency lighting device that can reliably suppress inrush current from a normal lighting circuit connected to a light emitting element when power is restored after a power failure with a simple configuration. Is an issue.

本発明の非常用点灯装置は、バックアップ電源から給電されて発光素子に給電可能な非常用点灯回路と、外部電源から給電されて発光素子に給電可能な常用点灯回路と、外部電源の停電に応じて停電信号を出力し、停電からの電源復帰に応じて電源復帰信号を出力する電源検出回路と、第１の信号に応じて非常用点灯回路を発光素子に接続させるとともに常用点灯回路を発光素子から遮断し、第２の信号に応じて常用点灯回路を発光素子に接続させるとともに非常用点灯回路を発光素子から遮断する切替部と、第３の信号を受けて常用点灯回路の出力動作を停止させ、第４の信号を受けて常用点灯回路に出力動作を実行させるスイッチと、停電信号に応じて第１の信号及び第３の信号を出力し、電源復帰信号に応じた所定時に第１の信号を第２の信号に切り替え、当該所定時以降に第３の信号を第４の信号に切り替える制御回路とを備える。 The emergency lighting device of the present invention includes an emergency lighting circuit that can be fed from a backup power source and can be fed to the light emitting element, a normal lighting circuit that can be fed from an external power source and can be fed to the light emitting element, and a power failure of the external power source A power detection circuit that outputs a power failure signal and outputs a power recovery signal in response to the power recovery from the power failure, and an emergency lighting circuit connected to the light emitting element in response to the first signal and a normal lighting circuit as the light emitting element Is connected to the light-emitting element in response to the second signal, and the switching unit that cuts off the emergency lighting circuit from the light-emitting element, and the output operation of the normal lighting circuit is stopped in response to the third signal. A first signal and a third signal are output in response to the power failure signal, and the first signal and the third signal are output in response to the power failure signal. Signal Switch to the signal, and a control circuit for switching the third signal to the predetermined time after the fourth signal.

本発明の非常用点灯装置によると、停電後の電源復帰時に、常用点灯回路が発光素子に接続された以降に常用点灯回路が出力動作を開始するようにスイッチが設けられる。すなわち、常用点灯回路と発光素子の接続後に発光素子への給電が開始される。したがって、停電後の電源復帰時に接続される常用点灯回路から発光素子への突入電流を簡素な構成で確実に抑制することが可能な非常用点灯装置が実現される。 According to the emergency lighting device of the present invention, when the power is restored after a power failure, the switch is provided so that the normal lighting circuit starts the output operation after the normal lighting circuit is connected to the light emitting element. That is, power supply to the light emitting element is started after the regular lighting circuit and the light emitting element are connected. Therefore, an emergency lighting device that can reliably suppress the inrush current from the service lighting circuit connected to the light emitting element when the power is restored after a power failure with a simple configuration is realized.

第１の態様の非常用点灯装置では、スイッチが、外部電源から常用点灯回路への入力経路に挿入接続され、第３の信号を受けてオフし、第４の信号を受けてオンするように構成される。これにより、第２の常用点灯回路の内部構成に変更を加える必要がなく、本発明の構成の導入容易性が高まる。 In the emergency lighting device of the first aspect, the switch is inserted and connected to the input path from the external power supply to the regular lighting circuit, and is turned off in response to the third signal, and is turned on in response to the fourth signal. Composed. Thereby, it is not necessary to change the internal configuration of the second service lighting circuit, and the ease of introducing the configuration of the present invention is enhanced.

第１の態様の変形例の非常用点灯装置では、常用点灯回路が、外部電源を全波整流する整流回路及びその整流回路の整流出力を発光素子への直流出力電流に変換するＤＣ／ＤＣコンバータを含み、スイッチは、整流回路の出力端とＤＣ／ＤＣコンバータの入力端と間の電流経路に挿入接続され、第３の信号を受けてオフし、第４の信号を受けてオンするように構成される。これにより、上記の場合と比べて定格電圧の低いスイッチを用いることができ、非常用点灯装置が低コスト化され得る。 In the emergency lighting device according to the modified example of the first aspect, the regular lighting circuit includes a rectifier circuit for full-wave rectification of the external power supply, and a DC / DC converter for converting the rectified output of the rectifier circuit into a DC output current to the light emitting element. The switch is inserted and connected to a current path between the output terminal of the rectifier circuit and the input terminal of the DC / DC converter, and is turned off in response to the third signal and turned on in response to the fourth signal. Composed. Thereby, a switch having a lower rated voltage than that in the above case can be used, and the cost of the emergency lighting device can be reduced.

第２の態様の非常用点灯装置では、常用点灯回路が、外部電源を全波整流する整流回路及びその整流回路の整流出力を発光素子への直流出力電流に変換するＤＣ／ＤＣコンバータを含み、ＤＣ／ＤＣコンバータが、スイッチング電源回路、そのスイッチング電源回路を駆動する駆動制御回路及びその駆動制御回路に制御電圧を供給する補助電源回路を含み、スイッチは、補助電源回路の電流経路に挿入接続され、第３の信号を受けてオフし、第４の信号を受けてオンするように構成される。これにより、第１の態様のスイッチと比べて、電流容量の小さいスイッチを用いることができ、非常用点灯装置が低コスト化され得る。 In the emergency lighting device according to the second aspect, the regular lighting circuit includes a rectifier circuit for full-wave rectification of the external power supply, and a DC / DC converter for converting the rectified output of the rectifier circuit into a DC output current to the light emitting element, The DC / DC converter includes a switching power supply circuit, a drive control circuit that drives the switching power supply circuit, and an auxiliary power supply circuit that supplies a control voltage to the drive control circuit. The switch is inserted and connected to the current path of the auxiliary power supply circuit. The third signal is turned off and the fourth signal is turned on. Thereby, compared with the switch of the 1st aspect, a switch with small current capacity can be used, and the emergency lighting device can be reduced in cost.

第３の態様の非常用点灯装置では、常用点灯回路が、外部電源を全波整流する整流回路及びその整流回路の整流出力を発光素子への直流出力電流に変換するＤＣ／ＤＣコンバータを含み、ＤＣ／ＤＣコンバータが、スイッチング電源回路及びそのスイッチング電源回路を駆動する駆動制御回路を含み、スイッチは、第３の信号を受けて、起動後の駆動制御回路によるスイッチング電源回路の駆動を無効化し、第４の信号を受けて駆動制御回路によるスイッチング電源回路の駆動を有効化するように構成される。これにより、第２の態様におけるスイッチと比べて定格電圧が低くかつ電流容量の小さいスイッチを用いることができ、非常用点灯装置がさらに低コスト化され得る。 In the emergency lighting device of the third aspect, the regular lighting circuit includes a rectifier circuit for full-wave rectification of the external power supply, and a DC / DC converter for converting the rectified output of the rectifier circuit into a DC output current to the light emitting element, The DC / DC converter includes a switching power supply circuit and a drive control circuit that drives the switching power supply circuit, and the switch receives the third signal, invalidates the driving of the switching power supply circuit by the drive control circuit after startup, The fourth signal is received to enable driving of the switching power supply circuit by the drive control circuit. Thereby, a switch having a lower rated voltage and a smaller current capacity can be used as compared with the switch in the second mode, and the cost of the emergency lighting device can be further reduced.

本発明の非常用点灯装置は、上記バックアップ電源と、外部電源を所定の電圧波形に変圧してバックアップ電源を充電する変圧充電回路とをさらに備える。また、本発明の非常用照明装置は、上記非常用点灯装置と、発光素子とを備える。これにより、停電後の電源復帰時に接続される常用点灯回路から発光素子への突入電流が確実に抑制され、発光素子の故障又は短寿命化が抑制される非常用照明装置が実現される。 The emergency lighting device according to the present invention further includes the backup power source and a transformer charging circuit that transforms the external power source into a predetermined voltage waveform to charge the backup power source. The emergency lighting device of the present invention includes the emergency lighting device and a light emitting element. Thus, an emergency lighting device is realized in which the inrush current from the regular lighting circuit connected when the power is restored after a power failure to the light emitting element is reliably suppressed, and the failure or shortening of the life of the light emitting element is suppressed.

第１の実施形態による非常用点灯装置を示すブロック図である。It is a block diagram which shows the emergency lighting device by 1st Embodiment. 第１の実施形態の非常用点灯装置における常用点灯回路の回路図である。It is a circuit diagram of the regular lighting circuit in the emergency lighting device of the first embodiment. 第１の実施形態の非常用点灯装置の動作を説明するタイムチャートである。It is a time chart explaining operation | movement of the emergency lighting device of 1st Embodiment. 比較例の非常用点灯装置の動作を説明するタイムチャートである。It is a time chart explaining operation | movement of the emergency lighting device of a comparative example. 第２の実施形態の非常用点灯装置における常用点灯回路の回路図である。It is a circuit diagram of the regular lighting circuit in the emergency lighting device of 2nd Embodiment. 第３の実施形態の非常用点灯装置における常用点灯回路の回路図である。It is a circuit diagram of the regular lighting circuit in the emergency lighting device of 3rd Embodiment. 第３の実施形態の非常用点灯装置における常用点灯回路の回路図である。It is a circuit diagram of the regular lighting circuit in the emergency lighting device of 3rd Embodiment.

＜第１の実施形態＞
図１に、本発明の第１の実施形態による非常用点灯装置１を含む非常用照明装置３のブロック図を示す。非常用点灯装置１及び発光素子２が、非常用照明装置３を構成する。非常用点灯装置１の入力端は点検スイッチＳＷを介して商用電源などの交流電源ＡＣ（外部電源）に接続され、出力端は発光素子２に接続される。本実施形態では、発光素子２は、直列接続又は直並列接続されたＬＥＤである。本開示において、外部電源が非常用点灯装置１に入力されないこと（各実施形態では、交流電源ＡＣが遮断されること又は点検スイッチＳＷがオフされること）を停電といい、停電後に交流電源が非常用点灯装置１に供給されることを電源復帰というものとする。 <First Embodiment>
FIG. 1 shows a block diagram of an emergency lighting device 3 including an emergency lighting device 1 according to the first embodiment of the present invention. The emergency lighting device 1 and the light emitting element 2 constitute an emergency lighting device 3. An input terminal of the emergency lighting device 1 is connected to an AC power source AC (external power source) such as a commercial power source via the inspection switch SW, and an output terminal is connected to the light emitting element 2. In the present embodiment, the light emitting element 2 is an LED connected in series or connected in series and parallel. In the present disclosure, the fact that an external power source is not input to the emergency lighting device 1 (in each embodiment, the AC power source AC is shut off or the inspection switch SW is turned off) is referred to as a power failure. Supplying to the emergency lighting device 1 is referred to as power recovery.

非常用点灯装置１は、非常用点灯回路１０、変圧充電回路１１、バックアップ電源１７、常用点灯回路２０、電源検出回路３０、制御回路４０、切替部５０及びスイッチ６０を備える。バックアップ電源１７は、例えば、充電可能なバッテリであり、非常用点灯装置１の筐体外部に接続される。ただし、バックアップ電源１７は、非常用点灯装置１の筐体内部に含まれてもよい。切替部５０は、非常用点灯回路１０側の接点（以下、「非常用接点」という）又は常用点灯回路２０側の接点（以下、「常用接点」という）に択一的に投入可能なリレースイッチである。スイッチ６０は、リレースイッチなどであり、交流電源ＡＣから常用点灯回路２０への入力経路に挿入接続される。 The emergency lighting device 1 includes an emergency lighting circuit 10, a transformer charging circuit 11, a backup power supply 17, a regular lighting circuit 20, a power supply detection circuit 30, a control circuit 40, a switching unit 50, and a switch 60. The backup power source 17 is a rechargeable battery, for example, and is connected to the outside of the housing of the emergency lighting device 1. However, the backup power source 17 may be included in the housing of the emergency lighting device 1. The switching unit 50 is a relay switch that can alternatively be turned on to a contact on the emergency lighting circuit 10 side (hereinafter referred to as “emergency contact”) or a contact on the normal lighting circuit 20 side (hereinafter referred to as “normal contact”). It is. The switch 60 is a relay switch or the like, and is inserted and connected to an input path from the AC power supply AC to the regular lighting circuit 20.

非常用点灯回路１０は、バックアップ電源１７の電圧を発光素子２の点灯に適した直流出力電流に変換してその直流出力電流を切替部５０（非常用接点）に印加するＤＣ／ＤＣコンバータである。非常用点灯回路１０の出力動作は制御回路４０によって有効化又は無効化されてもよいし、非常用点灯回路１０は制御回路４０から独立して常時動作するように構成されてもよい。 The emergency lighting circuit 10 is a DC / DC converter that converts the voltage of the backup power supply 17 into a DC output current suitable for lighting the light emitting element 2 and applies the DC output current to the switching unit 50 (emergency contact). . The output operation of the emergency lighting circuit 10 may be validated or invalidated by the control circuit 40, or the emergency lighting circuit 10 may be configured to always operate independently of the control circuit 40.

変圧充電回路１１は、整流回路１２、入力コンデンサ１３、電源回路１４、絶縁トランス１５及び充電回路１６を含む。整流回路１２が交流電源ＡＣの電圧を全波整流し、入力コンデンサ１３が整流回路１２の全波整流出力を若干平滑する。電源回路１４は、全波整流出力を高周波電圧に変換し、これを１次電圧として絶縁トランス１５の１次巻線に入力する。絶縁トランス１５は、その巻数比に応じて１次電圧を２次電圧に変圧（例えば昇圧）し、この２次電圧を充電回路１６に出力する。充電回路１６は、２次電圧から充電電流を生成してバックアップ電源１７に出力し、充電設定電圧までバックアップ電源１７を充電する。充電回路１６は、充電動作後には、バックアップ電源１７の充電電圧が設定値で一定となるように動作する。充電回路１６の出力電流（充電電流）は、制御回路４０によって制御されてもよいし、制御回路４０とは独立して充電回路１６内の制御回路によって制御されてもよい。 The transformer charging circuit 11 includes a rectifier circuit 12, an input capacitor 13, a power supply circuit 14, an insulating transformer 15, and a charging circuit 16. The rectifier circuit 12 full-wave rectifies the voltage of the AC power supply AC, and the input capacitor 13 slightly smoothes the full-wave rectified output of the rectifier circuit 12. The power supply circuit 14 converts the full-wave rectified output into a high-frequency voltage, and inputs this to the primary winding of the insulation transformer 15 as a primary voltage. The insulation transformer 15 transforms (for example, boosts) the primary voltage into a secondary voltage according to the turns ratio, and outputs the secondary voltage to the charging circuit 16. The charging circuit 16 generates a charging current from the secondary voltage, outputs the charging current to the backup power supply 17, and charges the backup power supply 17 to the charge setting voltage. After the charging operation, the charging circuit 16 operates so that the charging voltage of the backup power supply 17 becomes constant at the set value. The output current (charging current) of the charging circuit 16 may be controlled by the control circuit 40, or may be controlled by a control circuit in the charging circuit 16 independently of the control circuit 40.

常用点灯回路２０は、交流電源ＡＣの電圧を発光素子２の点灯に適した直流出力電流に変換してその直流出力電流を切替部５０（常用接点）に印加する。常用点灯回路２０は、交流電源ＡＣの入力を受けて、内部の制御回路によって自律的に出力動作を行う。 The normal lighting circuit 20 converts the voltage of the AC power supply AC into a DC output current suitable for lighting the light emitting element 2, and applies the DC output current to the switching unit 50 (normal contact). The regular lighting circuit 20 receives an input from the AC power supply AC and autonomously performs an output operation by an internal control circuit.

図２に、常用点灯回路２０の一例の回路図を示す。常用点灯回路２０は、整流回路２１、スイッチング電源回路２２、駆動制御回路２３及び補助電源回路２４を含み、全体としてフライバックコンバータを構成する。整流回路２１は、交流電源ＡＣの電圧を全波整流し、全波整流出力をスイッチング電源回路２２に出力する。なお、スイッチング電源回路２２、駆動制御回路２３及び補助電源回路２４をまとめてＤＣ／ＤＣコンバータともいう。 FIG. 2 shows a circuit diagram of an example of the regular lighting circuit 20. The regular lighting circuit 20 includes a rectifier circuit 21, a switching power supply circuit 22, a drive control circuit 23, and an auxiliary power supply circuit 24, and constitutes a flyback converter as a whole. The rectifier circuit 21 full-wave rectifies the voltage of the AC power supply AC and outputs a full-wave rectified output to the switching power supply circuit 22. The switching power supply circuit 22, the drive control circuit 23, and the auxiliary power supply circuit 24 are collectively referred to as a DC / DC converter.

スイッチング電源回路２２は入力コンデンサ２２０、トランス２２１、スイッチング素子（ＦＥＴ）２２２、ダイオード２２３及び出力コンデンサ２２４を含み、ＦＥＴ２２２は駆動制御回路２３によってスイッチング（ＰＷＭ駆動）される。電源供給時において、ＦＥＴ２２２のオン時に、全波整流出力（入力コンデンサ２２２の電圧）からＦＥＴ２２２及びトランス２２１の１次巻線に電流が流れ、トランス２２１にエネルギーが蓄えられる。ＦＥＴ２２２のオフ時に、トランス２２１に蓄えられたエネルギーがトランス２２１の２次巻線からダイオード２２３を介して出力され、出力コンデンサ２２４が充電される。出力コンデンサ２２４の電圧は、常用点灯回路２０の出力電圧として切替部５０の常用接点に印加される。切替部５０が常用接点に投入されている場合には、発光素子２に常用点灯回路２０の出力電圧が印加されるとともに出力電流が通電され、発光素子２が発光する。一方、切替部５０が非常用接点に投入されている場合には、常用点灯回路２０は無負荷状態となり、詳細を後述するように、常用点灯回路２０の上限出力電圧が切替部５０の常用接点に印加される。以降の説明において、常用点灯回路２０の出力電圧及び出力電流をそれぞれ単に出力電圧及び出力電流という。 The switching power supply circuit 22 includes an input capacitor 220, a transformer 221, a switching element (FET) 222, a diode 223, and an output capacitor 224, and the FET 222 is switched (PWM drive) by the drive control circuit 23. At the time of power supply, when the FET 222 is turned on, current flows from the full-wave rectified output (voltage of the input capacitor 222) to the primary winding of the FET 222 and the transformer 221, and energy is stored in the transformer 221. When the FET 222 is turned off, the energy stored in the transformer 221 is output from the secondary winding of the transformer 221 via the diode 223, and the output capacitor 224 is charged. The voltage of the output capacitor 224 is applied to the common contact of the switching unit 50 as the output voltage of the regular lighting circuit 20. When the switching unit 50 is inserted into the regular contact, the output voltage of the regular lighting circuit 20 is applied to the light emitting element 2 and the output current is applied, so that the light emitting element 2 emits light. On the other hand, when the switching unit 50 is inserted in the emergency contact, the service lighting circuit 20 is in a no-load state, and the upper limit output voltage of the service lighting circuit 20 is the service contact of the switching unit 50 as will be described in detail later. To be applied. In the following description, the output voltage and output current of the regular lighting circuit 20 are simply referred to as output voltage and output current, respectively.

駆動制御回路２３は、電圧検出回路２３１、電流検出抵抗２３２、オペアンプ２３３及び２３４、ダイオードＯＲ回路２３５、フォトカプラ２３６、抵抗２３７、ドライバＩＣ２３８並びに不図示の適宜の抵抗、コンデンサなどを含む。電圧検出回路２３１は、出力コンデンサ２２４に並列接続された抵抗分圧回路からなり、出力電圧を検出する。検出された出力電圧は、オペアンプ２３３の反転入力端子に入力される。電流検出抵抗２３２は、常用点灯回路２０の低電位側出力配線に挿入接続された低抵抗素子からなり、出力電流を検出する。検出された出力電流は、オペアンプ２３４の反転入力端子に入力される。なお、電圧検出回路２３１は、スイッチング電源回路２２の非動作時において出力コンデンサ２２４の電圧を低下させる放電抵抗としても作用する。 The drive control circuit 23 includes a voltage detection circuit 231, a current detection resistor 232, operational amplifiers 233 and 234, a diode OR circuit 235, a photocoupler 236, a resistor 237, a driver IC 238, and appropriate resistors and capacitors (not shown). The voltage detection circuit 231 includes a resistance voltage dividing circuit connected in parallel to the output capacitor 224, and detects the output voltage. The detected output voltage is input to the inverting input terminal of the operational amplifier 233. The current detection resistor 232 is composed of a low resistance element inserted and connected to the low potential side output wiring of the regular lighting circuit 20 and detects the output current. The detected output current is input to the inverting input terminal of the operational amplifier 234. The voltage detection circuit 231 also acts as a discharge resistor that reduces the voltage of the output capacitor 224 when the switching power supply circuit 22 is not operating.

オペアンプ２３３の非反転入力端子には、出力電圧の上限値に対応する電圧Ｖ１が入力される。オペアンプ２３４の非反転入力端子には、出力電流の目標値に対応する電圧Ｖ２が入力される。なお、オペアンプ２３３及び２３４の各々において、反転入力端子と出力端子の間には不図示のインピーダンス素子（抵抗、コンデンサなど）が接続されるものとする。ダイオードＯＲ回路２３５の一方のダイオードのカソードはオペアンプ２３３の出力端子に接続され、他方のダイオードのカソードはオペアンプ２３４の出力端子に接続され、共通アノードがフォトカプラ２３６のフォトダイオードのカソード側に接続される。フォトカプラ２３６のフォトダイオードと抵抗２３７の直列回路が、制御電圧などの固定電位点ＶｃとダイオードＯＲ回路２３５の共通アノードとの間に接続される。フォトカプラ２３６のフォトトランジスタは、ドライバＩＣ２３８の帰還端子Ｐ１に接続される。ドライバＩＣ２３８のゲート出力端子Ｐ２はＦＥＴ２２２のゲートに接続され、ドライバＩＣ２３８の接地端子Ｐ３はグランド（入力コンデンサ２２０の低電位側電極と同電位点）に接続される。 A voltage V 1 corresponding to the upper limit value of the output voltage is input to the non-inverting input terminal of the operational amplifier 233. The voltage V2 corresponding to the target value of the output current is input to the non-inverting input terminal of the operational amplifier 234. In each of the operational amplifiers 233 and 234, it is assumed that an impedance element (resistor, capacitor, etc.) (not shown) is connected between the inverting input terminal and the output terminal. The cathode of one diode of the diode OR circuit 235 is connected to the output terminal of the operational amplifier 233, the cathode of the other diode is connected to the output terminal of the operational amplifier 234, and the common anode is connected to the cathode side of the photodiode of the photocoupler 236. The A series circuit of a photodiode of the photocoupler 236 and a resistor 237 is connected between a fixed potential point Vc such as a control voltage and a common anode of the diode OR circuit 235. The phototransistor of the photocoupler 236 is connected to the feedback terminal P1 of the driver IC 238. The gate output terminal P2 of the driver IC 238 is connected to the gate of the FET 222, and the ground terminal P3 of the driver IC 238 is connected to the ground (the same potential point as the low potential side electrode of the input capacitor 220).

駆動制御回路２３は、出力電圧又は出力電流が所定値となるようにＦＥＴ２２２のＰＷＭ駆動をフィードバック制御する。オペアンプ２３３の出力又はオペアンプ２３４の出力のうちの低電圧側に対してダイオードＯＲ回路２３５が導通し、フォトカプラ２３６のフォトダイオードに流れる電流に応じた電流がフォトトランジスタに流れる。フォトトランジスタに流れる電流に応じてドライバＩＣ２３８の帰還端子Ｐ１の入力値が所定の変化方向に増減するようにフォトトランジスタが帰還端子Ｐ１に接続されるものとする。ドライバＩＣ２３８は、帰還端子Ｐ１の入力値に応じたオン時間のゲート信号をＦＥＴ２２２のゲートに出力し、ＦＥＴ２２２をＰＷＭ駆動する。これにより、無負荷時など、ダイオードＯＲ回路２３５がオペアンプ２３３側に導通する場合には出力電圧が上限値（電圧Ｖ１に対応する出力電圧）で一定となるようにＦＥＴ２２２がＰＷＭ駆動される。一方、有負荷時（すなわち、通常点灯時）など、ダイオードＯＲ回路２３５がオペアンプ２３４側に導通する場合には、出力電流が目標値（電圧Ｖ２に対応する出力電流）で一定となるようにＦＥＴ２２２がＰＷＭ駆動される。 The drive control circuit 23 feedback-controls the PWM drive of the FET 222 so that the output voltage or output current becomes a predetermined value. The diode OR circuit 235 conducts to the low voltage side of the output of the operational amplifier 233 or the output of the operational amplifier 234, and a current corresponding to the current flowing through the photodiode of the photocoupler 236 flows through the phototransistor. It is assumed that the phototransistor is connected to the feedback terminal P1 so that the input value of the feedback terminal P1 of the driver IC 238 increases or decreases in a predetermined change direction according to the current flowing through the phototransistor. The driver IC 238 outputs a gate signal with an ON time corresponding to the input value of the feedback terminal P1 to the gate of the FET 222, and drives the FET 222 by PWM. As a result, when the diode OR circuit 235 conducts to the operational amplifier 233 side, such as when there is no load, the FET 222 is PWM-driven so that the output voltage becomes constant at the upper limit value (the output voltage corresponding to the voltage V1). On the other hand, when the diode OR circuit 235 conducts to the operational amplifier 234 side, such as when there is a load (that is, during normal lighting), the FET 222 is set so that the output current is constant at the target value (the output current corresponding to the voltage V2). Are PWM driven.

補助電源回路２４は、起動抵抗２４１、トランス２２１の補助巻線２２１ｓに接続されたダイオード２４２、及びダイオード２４２に接続された定電圧回路２４３を含む。定電圧回路２４３は、平滑回路及びツェナーダイオード、シリーズレギュレータ、三端子レギュレータなどの周知の定電圧化回路である。起動抵抗２４１及び定電圧回路２４３の出力端は、ドライバＩＣ２３８の電源端子Ｐ４に接続される。なお、電源端子Ｐ４の外部（例えば、定電圧回路２４３の出力端）又は内部（ドライバＩＣ２３８の内部）に保護用のツェナーダイオードが接続され得る。ドライバＩＣ２３８は、整流回路２１の高電位側出力端から起動抵抗２４１を介して供給される起動電圧を受けて起動する。そして、ＦＥＴ２２２のスイッチングに応じて補助巻線２２１ｓに発生する電圧のダイオード２４２による整流電圧が定電圧回路２４３に入力され、定電圧回路２４３によって制御電圧Ｖｃｃが生成され、ドライバＩＣ２３８は制御電圧Ｖｃｃの供給を受けて動作を継続する。 The auxiliary power supply circuit 24 includes a starting resistor 241, a diode 242 connected to the auxiliary winding 221 s of the transformer 221, and a constant voltage circuit 243 connected to the diode 242. The constant voltage circuit 243 is a known constant voltage circuit such as a smoothing circuit, a Zener diode, a series regulator, and a three-terminal regulator. The output terminals of the starting resistor 241 and the constant voltage circuit 243 are connected to the power supply terminal P4 of the driver IC 238. A protective Zener diode can be connected to the outside (for example, the output terminal of the constant voltage circuit 243) or the inside (inside the driver IC 238) of the power supply terminal P4. The driver IC 238 is activated by receiving the activation voltage supplied from the high potential side output terminal of the rectifier circuit 21 via the activation resistor 241. Then, a rectified voltage generated by the diode 242 of the voltage generated in the auxiliary winding 221s according to the switching of the FET 222 is input to the constant voltage circuit 243, the control voltage Vcc is generated by the constant voltage circuit 243, and the driver IC 238 has the control voltage Vcc Continues operation upon receipt of supply.

電源検出回路３０は、整流回路１２の全波整流電圧（すなわち、入力コンデンサ１３の電圧）を検出する。電源検出回路３０は、例えば、全波整流電圧を分圧及び平滑する積分回路などで構成される。電源検出回路３０は、全波整流電圧（例えばピーク値）が閾値未満である場合には停電を検出して停電信号を制御回路４０に出力する。一方、電源検出回路３０は、全波整流電圧（例えばピーク値）が閾値以上となると電源復帰を検出して電源復帰信号を制御回路４０に出力する。なお、停電信号及び電源復帰信号はアナログ値であってもデジタル値であってもよい。電源検出回路３０から出力される停電信号及び電源復帰信号がアナログ信号（積分値）である場合、制御回路４０においてそのアナログ値が所定の閾値と比較されて停電及び電源復帰の判断がなされる。電源検出回路３０から出力される停電信号及び電源復帰信号がデジタル信号である場合、電源検出回路３０において検出値（積分値）が所定の閾値と比較されて停電信号及び電源復帰信号がデジタル信号として制御回路４０に出力される。いずれの場合であっても、電源検出回路３０が停電信号を出力したことに応じて制御回路４０において停電が判定され、電源検出回路３０が電源復帰信号を出力したことに応じて制御回路４０において電源復帰が判定されるものと定義される。なお、電源検出回路３０の基準電位（絶縁トランス１５の１次側）と制御回路４０の基準電位（絶縁トランス１５の２次側）とは異なるため、電源検出回路３０から制御回路４０への信号伝達はフォトカプラなどを介して行われ得る。 The power supply detection circuit 30 detects the full-wave rectified voltage of the rectifier circuit 12 (that is, the voltage of the input capacitor 13). The power supply detection circuit 30 includes, for example, an integration circuit that divides and smoothes the full-wave rectified voltage. The power supply detection circuit 30 detects a power failure and outputs a power failure signal to the control circuit 40 when the full-wave rectified voltage (for example, peak value) is less than the threshold value. On the other hand, when the full-wave rectified voltage (for example, peak value) is equal to or greater than the threshold value, the power supply detection circuit 30 detects power supply recovery and outputs a power supply recovery signal to the control circuit 40. The power failure signal and the power recovery signal may be analog values or digital values. When the power failure signal and the power recovery signal output from the power detection circuit 30 are analog signals (integrated values), the control circuit 40 compares the analog value with a predetermined threshold value to determine whether the power failure and power recovery. When the power failure signal and the power recovery signal output from the power detection circuit 30 are digital signals, the power detection circuit 30 compares the detection value (integrated value) with a predetermined threshold value, and the power failure signal and the power recovery signal are converted into digital signals. It is output to the control circuit 40. In any case, a power failure is determined in the control circuit 40 in response to the power detection circuit 30 outputting a power failure signal, and in the control circuit 40 in response to the power detection circuit 30 outputting a power return signal. It is defined that power recovery is determined. Since the reference potential of the power supply detection circuit 30 (primary side of the insulation transformer 15) is different from the reference potential of the control circuit 40 (secondary side of the insulation transformer 15), the signal from the power supply detection circuit 30 to the control circuit 40 is different. The transmission can be performed via a photocoupler or the like.

制御回路４０は、充電制御部４１、非常用制御部４２及び切替制御部４３を含む。充電制御部４１は、上述したように充電回路１６の出力電流を制御するとともに、出力電圧が上限値に達した後は出力電圧が上限値に維持されるように充電回路１６を制御する。ただし、上述したように、充電制御部４１の機能は、充電回路１６に含まれてもよい（すなわち、充電回路１６が制御回路４０とは独立して動作してもよい）。非常用制御部４２は、電源検出回路３０から停電信号が入力される場合には非常用点灯回路１０の出力動作を有効化し、電源復帰信号が入力される場合には非常用点灯回路１０の出力動作を停止させる。なお、制御回路４０の制御電源は、バックアップ電源１７から生成されてもよいし、バッテリなどの内部電源から生成されてもよい。いずれの場合であっても、制御回路４０は、以下に記載する規定の動作を実行可能なように制御電源の供給を受けるものとする。 The control circuit 40 includes a charge control unit 41, an emergency control unit 42, and a switching control unit 43. The charge control unit 41 controls the output current of the charging circuit 16 as described above, and controls the charging circuit 16 so that the output voltage is maintained at the upper limit value after the output voltage reaches the upper limit value. However, as described above, the function of the charging control unit 41 may be included in the charging circuit 16 (that is, the charging circuit 16 may operate independently of the control circuit 40). The emergency control unit 42 enables the output operation of the emergency lighting circuit 10 when a power failure signal is input from the power supply detection circuit 30, and outputs the emergency lighting circuit 10 when a power supply return signal is input. Stop operation. The control power supply of the control circuit 40 may be generated from the backup power supply 17 or an internal power supply such as a battery. In any case, the control circuit 40 is supplied with the control power so as to be able to execute the prescribed operation described below.

切替制御部４３は、信号Ｓ１及び信号Ｓ２を択一的に切替部５０に出力する。切替制御部４３は、電源検出回路３０から停電信号が入力される場合には信号Ｓ１を出力して切替部５０の投入位置を非常用接点に設定する。一方、切替制御部４３は、電源復帰信号が入力される場合（停電信号が入力されない場合）には信号Ｓ２を出力して切替部５０の投入位置を常用接点に設定する。すなわち、切替部５０は、信号Ｓ１に応じて非常用点灯回路１０を発光素子２に接続させるとともに常用点灯回路２０を発光素子２から遮断し、信号Ｓ２に応じて常用点灯回路２０を発光素子２に接続させるとともに非常用点灯回路１０を発光素子２から遮断する。なお、信号Ｓ１及び信号Ｓ２の一方がハイレベル信号で他方がローレベル信号であってもよいし、信号Ｓ１及び信号Ｓ２の一方がハイレベル信号で他方が無出力であってもよい。 The switching control unit 43 alternatively outputs the signal S1 and the signal S2 to the switching unit 50. When a power failure signal is input from the power supply detection circuit 30, the switching control unit 43 outputs a signal S1 and sets the input position of the switching unit 50 as an emergency contact. On the other hand, when the power supply return signal is input (when the power failure signal is not input), the switching control unit 43 outputs the signal S2 and sets the input position of the switching unit 50 as a regular contact. That is, the switching unit 50 connects the emergency lighting circuit 10 to the light emitting element 2 in response to the signal S1 and disconnects the common lighting circuit 20 from the light emitting element 2. The switching unit 50 disconnects the common lighting circuit 20 from the light emitting element 2 in response to the signal S2. And the emergency lighting circuit 10 is cut off from the light emitting element 2. Note that one of the signals S1 and S2 may be a high level signal and the other may be a low level signal, or one of the signals S1 and S2 may be a high level signal and the other may be non-output.

また、切替制御部４３は、信号Ｓ３及び信号Ｓ４を択一的にスイッチ６０に出力する。スイッチ６０は、信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンする。停電時において、切替制御部４３は信号Ｓ３を出力する。電源復帰時において、切替制御部４３は、信号Ｓ１から信号Ｓ２への切替時以後（すなわち、切替と同時又は切替の後）に信号Ｓ３を信号Ｓ４に切り替える。なお、停電時において、信号Ｓ４から信号Ｓ３への切替時は、信号Ｓ２から信号Ｓ１への切替時と同時であってもよいし、信号Ｓ２から信号Ｓ１への切替時よりも後であってもよい。なお、信号Ｓ３及び信号Ｓ４の一方がハイレベル信号で他方がローレベル信号であってもよいし、信号Ｓ３及び信号Ｓ４の一方がハイレベル信号で他方が無出力であってもよい。 The switching control unit 43 alternatively outputs the signal S3 and the signal S4 to the switch 60. Switch 60 receives signal S3 and turns off, and receives signal S4 and turns on. At the time of a power failure, the switching control unit 43 outputs a signal S3. At the time of power recovery, the switching control unit 43 switches the signal S3 to the signal S4 after switching from the signal S1 to the signal S2 (that is, at the same time as switching or after switching). In the event of a power failure, the switching from the signal S4 to the signal S3 may be simultaneous with the switching from the signal S2 to the signal S1, or after the switching from the signal S2 to the signal S1. Also good. Note that one of the signals S3 and S4 may be a high level signal and the other may be a low level signal, or one of the signals S3 and S4 may be a high level signal and the other may be non-output.

ここで、仮にスイッチ６０が設けられなかったとした場合の動作を説明する。図４は、非常用点灯装置１からスイッチ６０を省略（短絡）した比較例の動作を示すタイムチャートである。上段から、交流電源ＡＣの状態（点検スイッチＳＷはオン状態であるものとする）、切替部５０の接続状態、及び常用点灯回路２０の出力電圧を示し、横軸は時間である。時刻ｔ０までの期間は、停電状態であるものとする。 Here, the operation when the switch 60 is not provided will be described. FIG. 4 is a time chart showing the operation of the comparative example in which the switch 60 is omitted (short-circuited) from the emergency lighting device 1. From the top, the state of the AC power supply AC (assuming that the inspection switch SW is on), the connection state of the switching unit 50, and the output voltage of the regular lighting circuit 20 are shown, and the horizontal axis is time. It is assumed that the period up to time t0 is in a power failure state.

時刻ｔ０に電源が復帰したものとする。この時点では、電源検出回路３０におけるサンプリング（積分）などの応答時間に起因して、電源復帰信号は制御回路４０に出力されない。したがって、制御回路４０は信号Ｓ１を出力し、切替部５０は非常用接点に投入されている。一方、時刻ｔ０の電源復帰と同時に常用点灯回路２０が起動する。 It is assumed that the power supply is restored at time t0. At this time, the power supply return signal is not output to the control circuit 40 due to a response time such as sampling (integration) in the power supply detection circuit 30. Therefore, the control circuit 40 outputs the signal S1, and the switching unit 50 is input to the emergency contact. On the other hand, the regular lighting circuit 20 is activated simultaneously with the power recovery at time t0.

時刻ｔ１において、常用点灯回路２０が安定動作状態となる。この時点では、制御回路４０は未だに信号Ｓ２を出力しておらず、切替部５０は非常用接点に投入されている。したがって、時刻ｔ１以降において、常用点灯回路２０は、無負荷状態に応じて出力電圧を上限値に維持することになる。 At time t1, the regular lighting circuit 20 enters a stable operation state. At this time, the control circuit 40 has not yet output the signal S2, and the switching unit 50 is put in the emergency contact. Therefore, after time t1, the regular lighting circuit 20 maintains the output voltage at the upper limit value according to the no-load state.

時刻ｔ２（時刻ｔ０＋上記応答時間）において、電源検出回路３０が電源復帰信号を出力し、制御回路４０（切替制御部４３）は信号Ｓ２を出力し、切替部５０の投入位置を非常用接点から常用接点に切り替える。この時点で、既に常用点灯回路２０は出力電圧を上限値に維持しているため、この上限値の出力電圧が発光素子２に印加され、突入電流が流れることになる。その後、（発光素子２が正常に動作する場合には）出力電圧は発光素子２の順方向電圧Ｖｆで一定となる。 At time t2 (time t0 + response time), the power supply detection circuit 30 outputs a power supply return signal, the control circuit 40 (switching control unit 43) outputs a signal S2, and the input position of the switching unit 50 is changed from the emergency contact. Switch to regular contact. At this time, since the regular lighting circuit 20 has already maintained the output voltage at the upper limit value, the output voltage of the upper limit value is applied to the light emitting element 2 and an inrush current flows. Thereafter, (when the light emitting element 2 operates normally), the output voltage becomes constant at the forward voltage Vf of the light emitting element 2.

これに対して、図３に、スイッチ６０が設けられる本実施形態における動作を示す。図３において、上段から、交流電源ＡＣの状態（点検スイッチＳＷはオン状態であるものとする）、切替部５０の接続状態、スイッチ６０の動作状態、及び常用点灯回路２０の出力電圧を示し、横軸は時間である。時刻ｔ０までの期間は、停電状態であるものとする。 On the other hand, FIG. 3 shows an operation in this embodiment in which the switch 60 is provided. In FIG. 3, from the top, the state of the AC power source AC (assuming that the inspection switch SW is in the on state), the connection state of the switching unit 50, the operating state of the switch 60, and the output voltage of the regular lighting circuit 20 are shown. The horizontal axis is time. The period up to time t0 is assumed to be a power failure state.

時刻ｔ０に電源が復帰したものとする。この時点では、電源検出回路３０におけるサンプリング（積分）などの応答時間に起因して、電源復帰信号は制御回路４０に出力されない。したがって、制御回路４０（切替制御部４３）は、信号Ｓ１及び信号Ｓ３を出力し、切替部５０は非常用接点に投入され、スイッチ６０はオフされている。スイッチ６０はオフされているので、常用点灯回路２０は停止状態を維持する。 It is assumed that the power supply is restored at time t0. At this time, the power supply return signal is not output to the control circuit 40 due to a response time such as sampling (integration) in the power supply detection circuit 30. Therefore, the control circuit 40 (switch control unit 43) outputs the signal S1 and the signal S3, the switch unit 50 is turned on to the emergency contact, and the switch 60 is turned off. Since the switch 60 is turned off, the service lighting circuit 20 maintains the stopped state.

時刻ｔ２（時刻ｔ０＋上記応答時間）において、電源検出回路３０が電源復帰信号を出力し、切替制御部４３は信号Ｓ２を出力し、切替部５０の投入位置を非常用接点から常用接点に切り替える。この時点で、発光素子２は常用点灯回路２０に接続されるが、スイッチ６０はオフされているので常用点灯回路２０は停止している。 At time t2 (time t0 + response time), the power supply detection circuit 30 outputs a power supply return signal, the switching control unit 43 outputs a signal S2, and the switching position of the switching unit 50 is switched from the emergency contact to the regular contact. At this time, the light emitting element 2 is connected to the regular lighting circuit 20, but the regular lighting circuit 20 is stopped because the switch 60 is off.

時刻ｔ２以降の時刻ｔ３において、切替制御部４３が信号Ｓ４を出力し、スイッチ６０をオンする。これにより、常用点灯回路２０が起動し、出力電圧が徐々に増加していく。そして、出力電圧が発光素子２の順方向電圧Ｖｆとなった時点で、発光素子２に突入電流が流れることなく点灯が開始する。これ以降、出力電圧は、発光素子２の順方向電圧Ｖｆで一定となる。 At time t3 after time t2, the switching control unit 43 outputs a signal S4 and turns on the switch 60. As a result, the service lighting circuit 20 is activated, and the output voltage gradually increases. Then, when the output voltage becomes the forward voltage Vf of the light emitting element 2, lighting is started without an inrush current flowing through the light emitting element 2. Thereafter, the output voltage becomes constant at the forward voltage Vf of the light emitting element 2.

時刻ｔ２と時刻ｔ３の間の時間差は任意に定められるが、時刻ｔ２までの非常用点灯回路１０による発光素子２の点灯と、時刻ｔ３からの常用点灯回路２０による発光素子２の点灯との間の消灯期間長が問題とならない程度（例えば、０〜０．５秒程度）であればよい。なお、時刻ｔ３は時刻ｔ２と同時であってもよい。この場合、上記の消灯期間が最小化され得る。 The time difference between the time t2 and the time t3 is arbitrarily determined, but between the lighting of the light emitting element 2 by the emergency lighting circuit 10 until the time t2 and the lighting of the light emitting element 2 by the regular lighting circuit 20 from the time t3. As long as the length of the turn-off period does not become a problem (for example, about 0 to 0.5 seconds). Note that time t3 may be simultaneous with time t2. In this case, the extinguishing period can be minimized.

以上のように、本発明の非常用点灯装置１は、バックアップ電源１７から給電されて発光素子２に給電可能な非常用点灯回路１０と、交流電源ＡＣから給電されて発光素子２に給電可能な常用点灯回路２０と、交流電源ＡＣの停電に応じて停電信号を出力し、停電からの電源復帰に応じて電源復帰信号を出力する電源検出回路３０と、信号Ｓ１に応じて非常用点灯回路１０を発光素子２に接続させるとともに常用点灯回路２０を発光素子２から遮断し、信号Ｓ２に応じて常用点灯回路２０を発光素子２に接続させるとともに非常用点灯回路１０を発光素子２から遮断する切替部５０と、信号Ｓ３を受けて常用点灯回路２０の出力動作を停止させ、信号Ｓ４を受けて常用点灯回路２０に出力動作を実行させるスイッチ６０と、停電信号に応じて信号Ｓ１及び信号Ｓ３を出力し、電源復帰信号に応じた所定時に信号Ｓ１を信号Ｓ２に切り替え、所定時以降に信号Ｓ３を信号Ｓ４に切り替える制御回路４０とを備える。 As described above, the emergency lighting device 1 of the present invention can supply power to the light emitting element 2 by supplying power from the backup power supply 17 and supplying power to the light emitting element 2 and the AC lighting AC. A normal lighting circuit 20, a power detection circuit 30 that outputs a power failure signal in response to a power failure of the AC power supply AC, a power recovery signal in response to a power recovery from the power failure, and an emergency lighting circuit 10 in response to the signal S 1. Is connected to the light emitting element 2 and the normal lighting circuit 20 is disconnected from the light emitting element 2, and the normal lighting circuit 20 is connected to the light emitting element 2 and the emergency lighting circuit 10 is disconnected from the light emitting element 2 in response to the signal S2. In response to the power failure signal, the switch 50 that receives the signal S3, stops the output operation of the regular lighting circuit 20 and receives the signal S4, and causes the regular lighting circuit 20 to perform the output operation. Outputs issue S1 and signal S3, the switching signal S1 to the predetermined time corresponding to the power return signal to the signal S2, and a control circuit 40 for switching the signal S3 in a predetermined time after the signal S4.

このように、停電後の電源復帰時に、常用点灯回路２０が発光素子２に接続された以降に常用点灯回路２０が出力動作を開始する（起動する）ようにスイッチ６０が設けられる。すなわち、常用点灯回路２０と発光素子２の接続後に発光素子２への給電が開始される。したがって、停電後の電源復帰時に接続される常用点灯回路２０から発光素子２への突入電流を簡素な構成で確実に抑制することが可能な非常用点灯装置１及び非常用照明装置３が実現される。 As described above, the switch 60 is provided so that the normal lighting circuit 20 starts (starts up) the output operation after the normal lighting circuit 20 is connected to the light emitting element 2 when the power is restored after a power failure. That is, power supply to the light emitting element 2 is started after the regular lighting circuit 20 and the light emitting element 2 are connected. Therefore, the emergency lighting device 1 and the emergency lighting device 3 that can reliably suppress the inrush current from the normal lighting circuit 20 connected to the light emitting element 2 when the power is restored after a power failure with a simple configuration are realized. The

特に本実施形態では、スイッチ６０が、交流電源ＡＣから常用点灯回路２０への入力経路に挿入接続され、信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンするように構成される。したがって、常用点灯回路２０の内部構成に変更を加える必要がなく、本発明の構成の導入容易性が高まる。 In particular, in this embodiment, the switch 60 is inserted and connected to the input path from the AC power supply AC to the regular lighting circuit 20, and is configured to be turned off in response to the signal S3 and turned on in response to the signal S4. Therefore, it is not necessary to change the internal configuration of the regular lighting circuit 20, and the ease of introducing the configuration of the present invention is enhanced.

なお、変形例として、スイッチ６０が、整流回路２１の出力端とＤＣ／ＤＣコンバータ（スイッチング電源回路２２）の入力端と間の電流経路に挿入接続されてもよい。この場合も、スイッチ６０は、信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンするように構成される。なお、スイッチ６０は、入力コンデンサ２２０に対して整流回路２１側に接続されてもよいし、スイッチング電源回路２２側に接続されてもよい。この構成によると、常用点灯回路２０への変更が必要となるが、上記実施形態の場合と比べて低い耐圧のスイッチ６０を用いることができ、非常用点灯装置１が低コスト化され得る。 As a modification, the switch 60 may be inserted and connected in a current path between the output terminal of the rectifier circuit 21 and the input terminal of the DC / DC converter (switching power supply circuit 22). Also in this case, the switch 60 is configured to be turned off in response to the signal S3 and to be turned on in response to the signal S4. The switch 60 may be connected to the rectifier circuit 21 side with respect to the input capacitor 220 or may be connected to the switching power supply circuit 22 side. According to this configuration, a change to the regular lighting circuit 20 is required, but the switch 60 having a lower withstand voltage than that in the above embodiment can be used, and the emergency lighting device 1 can be reduced in cost.

＜第２の実施形態＞
上記第１の実施形態では、スイッチ６０が交流電源ＡＣから常用点灯回路２０までの入力経路に挿入接続される構成を示したが、本実施形態では、スイッチが補助電源回路２４に関して接続される構成を示す。 <Second Embodiment>
In the first embodiment, the configuration in which the switch 60 is inserted and connected to the input path from the AC power supply AC to the regular lighting circuit 20 is shown. However, in the present embodiment, the switch is connected in relation to the auxiliary power supply circuit 24. Indicates.

図５に、本実施形態の非常用点灯装置１における常用点灯回路２０の回路図を示す。本実施形態において、第１の実施形態と同様の構成には同じ符号を付し、その説明を省略又は簡略化する。本実施形態の非常用点灯装置１において、常用点灯回路２０以外の構成は、スイッチ６０の構成を除いて第１の実施形態の構成と同様である。 In FIG. 5, the circuit diagram of the regular lighting circuit 20 in the emergency lighting device 1 of this embodiment is shown. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified. In the emergency lighting device 1 of the present embodiment, the configuration other than the regular lighting circuit 20 is the same as the configuration of the first embodiment except for the configuration of the switch 60.

本実施形態のスイッチ６０は、補助電源回路２４の起動抵抗２４１に直列接続される。具体的には、整流回路２１の高電位側出力端からドライバＩＣ２３８の電源端子Ｐ４の間において、起動抵抗２４１に直列接続される。また、トランス２２１の３次巻線２２１ｓから電源端子Ｐ４の間において定電圧回路２４３に直列接続されてよい。 The switch 60 of this embodiment is connected in series to the starting resistor 241 of the auxiliary power circuit 24. Specifically, the start resistor 241 is connected in series between the output terminal of the rectifier circuit 21 and the power supply terminal P4 of the driver IC 238. Further, the constant voltage circuit 243 may be connected in series between the tertiary winding 221s of the transformer 221 and the power supply terminal P4.

スイッチ６０は、第１の実施形態と同様に、制御回路４０（切替制御部４３）から信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンする。すなわち、常用点灯回路２０において、電源復帰後に信号Ｓ４が入力されるまでは、入力コンデンサ２２０が充電されるもののＦＥＴ２２２のスイッチング動作は開始されず、出力電圧は実質的にゼロとなる。なお、電源復帰時以降における切替部５０の接続状態、スイッチ６０の動作状態及び常用点灯回路２０の出力電圧は、図３に示した第１の実施形態のものと実質的に同様である。 As in the first embodiment, the switch 60 receives the signal S3 from the control circuit 40 (switching control unit 43) and turns off, and receives the signal S4 and turns on. That is, in the regular lighting circuit 20, until the signal S4 is input after the power is restored, the input capacitor 220 is charged, but the switching operation of the FET 222 is not started, and the output voltage becomes substantially zero. Note that the connection state of the switching unit 50, the operation state of the switch 60, and the output voltage of the regular lighting circuit 20 after the power return is substantially the same as those of the first embodiment shown in FIG.

したがって、本実施形態においても第１の実施形態と同様に、停電後の電源復帰時に、常用点灯回路２０が発光素子２に接続された以降に常用点灯回路２０（特に、スイッチング電源回路２２）が出力動作を開始する（起動する）ようにスイッチ６０が設けられる。すなわち、常用点灯回路２０と発光素子２の接続後に発光素子２への給電が開始される。したがって、停電後の電源復帰時に接続される常用点灯回路２０から発光素子２への突入電流を簡素な構成で確実に抑制することが可能な非常用点灯装置１及び非常用照明装置３が実現される。 Therefore, also in the present embodiment, as in the first embodiment, the service lighting circuit 20 (particularly the switching power circuit 22) is connected after the service lighting circuit 20 is connected to the light emitting element 2 when the power is restored after a power failure. A switch 60 is provided to start (activate) the output operation. That is, power supply to the light emitting element 2 is started after the regular lighting circuit 20 and the light emitting element 2 are connected. Therefore, the emergency lighting device 1 and the emergency lighting device 3 that can reliably suppress the inrush current from the normal lighting circuit 20 connected to the light emitting element 2 when the power is restored after a power failure with a simple configuration are realized. The

特に、本実施形態では、ＤＣ／ＤＣコンバータの補助電源回路２４において、スイッチ６０が、補助電源回路２４の電流経路に挿入接続され、信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンするように構成される。これにより、第１の実施形態のスイッチ６０と比べて、電流容量の小さいスイッチ６０を用いることができ、非常用点灯装置１が低コスト化され得る。 In particular, in the present embodiment, in the auxiliary power supply circuit 24 of the DC / DC converter, the switch 60 is inserted and connected to the current path of the auxiliary power supply circuit 24, receives the signal S3, and turns off in response to the signal S4. Configured. Thereby, compared with the switch 60 of 1st Embodiment, the switch 60 with small current capacity can be used, and the emergency lighting device 1 can be reduced in cost.

＜第３の実施形態＞
上記第２の実施形態では、スイッチ６０が補助電源回路２４に関して接続された構成を示したが、本実施形態では、スイッチ６０が駆動制御回路２３に関して接続された構成を示す。 <Third Embodiment>
In the second embodiment, the configuration in which the switch 60 is connected with respect to the auxiliary power supply circuit 24 is shown. However, in this embodiment, the configuration in which the switch 60 is connected with respect to the drive control circuit 23 is shown.

図６に、本実施形態の非常用点灯装置１における常用点灯回路２０の回路図を示す。本実施形態において、第１又は第２の実施形態と同様の構成には同じ符号を付し、その説明を省略又は簡略化する。本実施形態の非常用点灯装置１において、常用点灯回路２０以外の構成は、スイッチ６０の構成を除いて第１の実施形態の構成と同様である。 FIG. 6 shows a circuit diagram of the regular lighting circuit 20 in the emergency lighting device 1 of the present embodiment. In this embodiment, the same code | symbol is attached | subjected to the structure similar to 1st or 2nd embodiment, and the description is abbreviate | omitted or simplified. In the emergency lighting device 1 of the present embodiment, the configuration other than the regular lighting circuit 20 is the same as the configuration of the first embodiment except for the configuration of the switch 60.

本実施形態のスイッチ６０は、駆動制御回路２３のドライバＩＣ２３８の有効／無効端子Ｐ５に接続される。ドライバＩＣ２３８は、有効／無効端子Ｐ５の入力電圧が閾値を超えると（ハイレベルとなると）駆動動作を停止し、すなわちゲート信号の出力を停止するように構成されているものとする。有効／無効端子Ｐ５は、制御電圧Ｖｃｃとグランドの間に接続された抵抗分圧回路２３９の分圧点に接続される。スイッチ６０は、有効／無効端子Ｐ５とグランドの間に接続される。スイッチ６０がオンした状態においては、有効／無効端子Ｐ５の入力電圧はグランド電位（ローレベル）となり、ドライバＩＣ２３８は駆動動作を行う。スイッチ６０がオフした状態においては、有効／無効端子Ｐ５の入力電圧が抵抗分圧回路２３９の分圧値（ハイレベル）となり、ドライバＩＣ２３８は駆動動作を停止する。 The switch 60 of this embodiment is connected to the valid / invalid terminal P5 of the driver IC 238 of the drive control circuit 23. It is assumed that the driver IC 238 is configured to stop the driving operation when the input voltage of the valid / invalid terminal P5 exceeds the threshold value (when it becomes high level), that is, stop the output of the gate signal. The valid / invalid terminal P5 is connected to the voltage dividing point of the resistance voltage dividing circuit 239 connected between the control voltage Vcc and the ground. The switch 60 is connected between the valid / invalid terminal P5 and the ground. When the switch 60 is turned on, the input voltage of the valid / invalid terminal P5 becomes the ground potential (low level), and the driver IC 238 performs a driving operation. In the state where the switch 60 is turned off, the input voltage of the valid / invalid terminal P5 becomes the divided value (high level) of the resistance voltage dividing circuit 239, and the driver IC 238 stops the driving operation.

スイッチ６０は、第１及び第２の実施形態と同様に、制御回路４０（切替制御部４３）から信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンする。したがって、電源復帰後に信号Ｓ４が入力されるまでは、常用点灯回路２０において、入力コンデンサ２２０が充電され、ドライバＩＣ２３８が起動するものの、ＦＥＴ２２２のスイッチング動作は開始されず、出力電圧は実質的にゼロとなる。なお、電源復帰時以降における切替部５０の接続状態、スイッチ６０の動作状態及び常用点灯回路２０の出力電圧は、図３に示した第１の実施形態のものと実質的に同様である。 As in the first and second embodiments, the switch 60 receives the signal S3 from the control circuit 40 (switching control unit 43) and turns off, and receives the signal S4 and turns on. Therefore, until the signal S4 is input after the power is restored, the input capacitor 220 is charged and the driver IC 238 is activated in the regular lighting circuit 20, but the switching operation of the FET 222 is not started, and the output voltage is substantially zero. It becomes. Note that the connection state of the switching unit 50, the operation state of the switch 60, and the output voltage of the regular lighting circuit 20 after the power return is substantially the same as those of the first embodiment shown in FIG.

また、有効／無効端子Ｐ５の仕様（入力ハイレベルで駆動停止であるのか、入力ローレベルで駆動停止であるのか）、スイッチ６０の接続位置（端子Ｐ５に対してグランド側に接続されるのか、端子Ｐ５に対して制御電圧Ｖｃｃ側に接続されるのか）、信号Ｓ３及びＳ４に対するスイッチ６０の仕様（信号Ｓ３／Ｓ４に対してオン／オフなのか、オフ／オンなのか）は、適宜変更可能である。すなわち、切替制御部４３から信号Ｓ３が出力される場合にはドライバＩＣ２３８が停止し、信号Ｓ４が出力される場合にはドライバＩＣ２３８が動作するように構成される。 In addition, the specification of the valid / invalid terminal P5 (whether driving is stopped at the input high level or driving stopped at the input low level), the connection position of the switch 60 (whether it is connected to the ground side with respect to the terminal P5, Whether the terminal P5 is connected to the control voltage Vcc side) and the specifications of the switch 60 for the signals S3 and S4 (whether the signal S3 / S4 is on / off or off / on) can be changed as appropriate. It is. That is, the driver IC 238 is stopped when the signal S3 is output from the switching control unit 43, and the driver IC 238 is operated when the signal S4 is output.

代替例として、図７に示すように、スイッチ６０が、ゲート出力端子Ｐ２とＦＥＴ２２２のゲートの間の配線に挿入接続されてもよい。この場合も、スイッチ６０は、信号Ｓ３を受けてオフし、信号Ｓ４を受けてオンするように構成される。この構成によっても、電源復帰後に信号Ｓ４が入力されるまでは、常用点灯回路２０において、入力コンデンサ２２０が充電され、ドライバＩＣ２３８が起動するものの、ＦＥＴ２２２のスイッチング動作は開始されず、出力電圧は実質的にゼロとなる。また、スイッチ６０は、有効／無効端子Ｐ５以外の他の保護用端子（不図示）に適宜の態様で接続されて、信号Ｓ３を受けて保護動作（ドライバＩＣ２３８の動作停止）を実行し、信号Ｓ４を受けて保護動作を解除するように構成されてもよい。 As an alternative example, as shown in FIG. 7, the switch 60 may be inserted and connected to the wiring between the gate output terminal P <b> 2 and the gate of the FET 222. Also in this case, the switch 60 is configured to be turned off in response to the signal S3 and to be turned on in response to the signal S4. Even with this configuration, until the signal S4 is input after the power is restored, the input capacitor 220 is charged in the regular lighting circuit 20 and the driver IC 238 is activated, but the switching operation of the FET 222 is not started, and the output voltage is substantially reduced. Will be zero. In addition, the switch 60 is connected to a protective terminal (not shown) other than the valid / invalid terminal P5 in an appropriate manner, receives the signal S3, and performs a protective operation (stops the operation of the driver IC 238). It may be configured to cancel the protection operation in response to S4.

このように、本実施形態においても第１及び第２の実施形態と同様に、停電後の電源復帰時に、常用点灯回路２０が発光素子２に接続された以降に常用点灯回路２０（特に、スイッチング電源回路２２）が出力動作を開始するようにスイッチ６０が設けられる。すなわち、常用点灯回路２０と発光素子２の接続後に発光素子２への給電が開始される。したがって、停電後の電源復帰時に接続される常用点灯回路２０から発光素子２への突入電流を簡素な構成で確実に抑制することが可能な非常用点灯装置１及び非常用照明装置３が実現される。 As described above, also in the present embodiment, as in the first and second embodiments, the service lighting circuit 20 (particularly switching) is performed after the service lighting circuit 20 is connected to the light emitting element 2 when power is restored after a power failure. A switch 60 is provided so that the power supply circuit 22) starts the output operation. That is, power supply to the light emitting element 2 is started after the regular lighting circuit 20 and the light emitting element 2 are connected. Therefore, the emergency lighting device 1 and the emergency lighting device 3 that can reliably suppress the inrush current from the normal lighting circuit 20 connected to the light emitting element 2 when the power is restored after a power failure with a simple configuration are realized. The

特に、本実施形態では、ＤＣ／ＤＣコンバータの駆動制御回路２３において、スイッチ６０が、信号Ｓ３を受けて、起動後の駆動制御回路２３によるスイッチング電源回路２２の駆動（スイッチング動作）を無効化し、信号Ｓ４を受けて駆動制御回路２３によるスイッチング電源回路２２の駆動を有効化するように構成される。これにより、第２の実施形態におけるスイッチ６０と比べて定格電圧が低くかつ電流容量の小さいスイッチ６０を用いることができ、非常用点灯装置１がさらに低コスト化され得る。 In particular, in the present embodiment, in the drive control circuit 23 of the DC / DC converter, the switch 60 receives the signal S3, invalidates the drive (switching operation) of the switching power supply circuit 22 by the drive control circuit 23 after startup, In response to the signal S4, the drive control circuit 23 is configured to validate the drive of the switching power supply circuit 22. Thereby, compared with the switch 60 in 2nd Embodiment, the rated voltage and the switch 60 with small current capacity can be used, and the emergency lighting device 1 can be further reduced in cost.

＜変形例＞
以上に本発明の好適な実施形態を示したが、本発明は、例えば以下に示すように種々の態様に変形可能である。 <Modification>
Although preferred embodiments of the present invention have been described above, the present invention can be modified into various modes as shown below, for example.

（１）発光素子２に関する変形
上記各実施形態では、発光素子２がＬＥＤである構成を説明したが、発光素子２は有機ＥＬなど他の発光素子であってもよい。 (1) Modification Regarding Light-Emitting Element 2 In the above embodiments, the configuration in which the light-emitting element 2 is an LED has been described, but the light-emitting element 2 may be another light-emitting element such as an organic EL.

（２）外部電源に関する変形
上記各実施形態では、外部電源として交流電源ＡＣを示したが、外部電源は直流電源であってもよい。この場合、非常用点灯回路１０側の整流回路１２及び常用点灯回路２０の整流回路２１はなくてもよい。 (2) Modifications related to external power supply In the above embodiments, the AC power supply AC is shown as the external power supply, but the external power supply may be a DC power supply. In this case, the rectifying circuit 12 on the emergency lighting circuit 10 side and the rectifying circuit 21 of the regular lighting circuit 20 may be omitted.

（３）スイッチング電源回路２２に関する変形
上記各実施形態では、スイッチング電源回路２２が力率改善型の（すなわち、入力コンデンサ２２０の容量が出力コンデンサ２２４の容量よりも小さい）フライバックコンバータを構成する例を示したが、スイッチング電源回路２２のコンバータ形式はこれに限られない。例えば、スイッチング電源回路２２は、力率改善型でない（すなわち、入力コンデンサの容量が出力コンデンサの容量よりも大きい）フライバックコンバータ、昇圧チョッパ回路（力率改善回路）及び降圧チョッパ回路（バックコンバータ）などであってもよい。スイッチング電源回路２２が昇圧チョッパ回路及び降圧チョッパ回路からなる場合、第２の実施形態のスイッチ６０は、降圧チョッパ回路に制御電圧を供給する補助電源回路の電流経路に挿入接続されることが好ましい。また、同場合に、第３の実施形態のスイッチ６０は、降圧チョッパ回路の駆動制御回路に含まれるドライバＩＣの有効／無効端子、ゲート端子、保護用端子などに対して適用されることが好ましい。 (3) Modification Regarding Switching Power Supply Circuit 22 In each of the above embodiments, the switching power supply circuit 22 constitutes a power factor improving type flyback converter (that is, the capacity of the input capacitor 220 is smaller than the capacity of the output capacitor 224). However, the converter type of the switching power supply circuit 22 is not limited to this. For example, the switching power supply circuit 22 is not a power factor improving type (that is, the capacity of an input capacitor is larger than the capacity of an output capacitor), a flyback converter, a boost chopper circuit (power factor improving circuit), and a step-down chopper circuit (buck converter). It may be. When the switching power supply circuit 22 includes a step-up chopper circuit and a step-down chopper circuit, the switch 60 of the second embodiment is preferably inserted and connected to a current path of an auxiliary power supply circuit that supplies a control voltage to the step-down chopper circuit. In this case, the switch 60 of the third embodiment is preferably applied to the valid / invalid terminal, gate terminal, protection terminal, etc. of the driver IC included in the drive control circuit of the step-down chopper circuit. .

（４）駆動制御回路２３に関する変形
上記各実施形態では、無負荷時に駆動制御回路２３が出力電圧をフィードバックして上限値で一定となるようにＦＥＴ２２２を駆動する構成を示した。一方、無負荷時に駆動制御回路２３が出力電圧をフィードバックせずに固定の高出力状態でＦＥＴ２２２を駆動する構成が採用されてもよい。 (4) Modification Regarding Drive Control Circuit 23 In each of the above embodiments, the configuration is shown in which the drive control circuit 23 drives the FET 222 so that the output voltage is fed back to be constant at the upper limit value when there is no load. On the other hand, a configuration may be employed in which the drive control circuit 23 drives the FET 222 in a fixed high output state without feeding back the output voltage when there is no load.

１非常用点灯装置
２発光素子
３非常用照明装置
１０非常用点灯回路
１１変圧充電回路
１７バックアップ電源
２０常用点灯回路
２１整流回路
２２スイッチング電源回路
２３駆動制御回路
２４補助電源回路
３０電源検出回路
４０制御回路
５０切替部
６０スイッチ
DESCRIPTION OF SYMBOLS 1 Emergency lighting device 2 Light emitting element 3 Emergency lighting device 10 Emergency lighting circuit 11 Transformer charging circuit 17 Backup power supply 20 Regular lighting circuit 21 Rectifier circuit 22 Switching power supply circuit 23 Drive control circuit 24 Auxiliary power supply circuit 30 Power supply detection circuit 40 Control Circuit 50 switching unit 60 switch

Claims

An emergency lighting device,
An emergency lighting circuit that can be fed from a backup power source and fed to the light emitting element;
A regular lighting circuit that is fed from an external power source and can feed the light emitting element;
A power detection circuit that outputs a power failure signal in response to a power failure of the external power supply, and outputs a power recovery signal in response to power recovery from the power failure,
The emergency lighting circuit is connected to the light emitting element in response to a first signal, the common lighting circuit is disconnected from the light emitting element, and the common lighting circuit is connected to the light emitting element in response to a second signal. And a switching unit that shuts off the emergency lighting circuit from the light emitting element,
A switch for receiving a third signal to stop the output operation of the regular lighting circuit, and for receiving a fourth signal to cause the regular lighting circuit to perform the output operation;
The first signal and the third signal are output in response to the power failure signal, the first signal is switched to the second signal at a predetermined time corresponding to the power return signal, and after the predetermined time, the first signal is switched to the second signal. An emergency lighting device comprising: a control circuit that switches a third signal to the fourth signal.

The switch is inserted and connected to an input path from the external power source to the regular lighting circuit, and is configured to be turned off in response to the third signal and to be turned on in response to the fourth signal. The emergency lighting device according to 1.

The regular lighting circuit includes a rectifying circuit for full-wave rectification of the external power supply, and a DC / DC converter for converting a rectified output of the rectifying circuit into a direct current output current to the light emitting element,
The switch is inserted and connected to a current path between the output terminal of the rectifier circuit and the input terminal of the DC / DC converter, and turns off in response to the third signal, and turns on in response to the fourth signal. The emergency lighting device according to claim 1, configured as described above.

The regular lighting circuit includes a rectifying circuit for full-wave rectification of the external power supply, and a DC / DC converter for converting a rectified output of the rectifying circuit into a direct current output current to the light emitting element,
The DC / DC converter includes a switching power supply circuit that outputs the direct current, a drive control circuit that drives the switching power supply circuit, and an auxiliary power supply circuit that supplies a control voltage to the drive control circuit;
2. The switch according to claim 1, wherein the switch is inserted and connected to a current path of the auxiliary power circuit, and is configured to be turned off in response to the third rectified signal and to be turned on in response to the fourth signal. Emergency lighting device.

The regular lighting circuit includes a rectifying circuit for full-wave rectification of the external power supply, and a DC / DC converter for converting a rectified output of the rectifying circuit into a direct current output current to the light emitting element,
The DC / DC converter includes a switching power supply circuit for outputting the direct current and a drive control circuit for driving the switching power supply circuit;
The switch receives the third signal, invalidates the driving of the switching power supply circuit by the drive control circuit after activation, and receives the fourth signal to drive the switching power supply circuit by the drive control circuit The emergency lighting device according to claim 1, wherein the emergency lighting device is configured to activate the lamp.

The emergency lighting device according to any one of claims 1 to 5, further comprising: the backup power source; and a transformer charging circuit that transforms the external power source into a predetermined voltage waveform to charge the backup power source.

An emergency lighting device comprising the emergency lighting device according to claim 6 and the light emitting element.