WO2004023030A1

WO2004023030A1 - Emergency lamp

Info

Publication number: WO2004023030A1
Application number: PCT/JP2003/011146
Authority: WO
Inventors: Shinichi Yokoyama
Original assignee: Nippon Chemi-Con Corporation
Priority date: 2002-09-04
Filing date: 2003-09-01
Publication date: 2004-03-18
Also published as: JP2004103256A

Abstract

There is provided an emergency lamp having a longer service life at a reduced cost. The emergency lamp includes capacitors (DLC 8, 10) charged during power supply, switching means (a switching circuit 16) electrically connected upon detection of power supply stop, and light emitting diodes (high-luminance LED 2, 4, 6) which are turned on by discharge of the aforementioned capacitors when the switching means is electrically connected. For the capacitors, a high-luminance light emitting diode is used, and a light emitting diode which emits light by charging current is used for indicating charging during charging of the capacitors.

Description

Emergency light technical field

The present invention relates to an emergency light that is detachably attached to a power-supplied outlet such as a commercial AC power supply, is charged in a normal state, and is turned on in an emergency such as a power failure.

Akira Background technology

Emergency lights are lighting equipment used in emergency situations such as a power outage.

It uses batteries and uses light bulb power for the light source. Examples of this type of emergency light include the following Patent Documents 1 to 4 and the like.

Patent document 1: Japanese Patent Application Laid-Open No. Hei 7-211101

Patent Document 2: Japanese Patent Application Laid-Open No. Hei 8-244992

Patent Document 3: Japanese Patent Application Laid-Open No. 8-287073

Patent Document 4: Japanese Patent Application Laid-Open No. H10-274720

The technologies according to Patent Documents 1 to 4 relate to an emergency light in which a battery and a light bulb are combined. Emergency lights, which consist of a combination of batteries and light bulbs, have the disadvantage of not being able to provide the necessary functions in an emergency because of the short life of batteries and light bulbs. For this reason, the user has to check the operation and prepare for an emergency, which has the disadvantage that running costs are increased in addition to the trouble of replacing batteries and bulbs. Disclosure of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide an emergency light that has a long service life and a low running cost.

Further, another object of the present invention is to provide an emergency light which can obtain high luminance luminous power with low power consumption.

The configuration of the emergency light according to the present invention that has solved such a problem is as follows.

In order to achieve the above object, an emergency light according to the present invention includes a capacitor that is charged when power is supplied. (DLC 8, 10), a switching means (switching circuit 16) that detects conduction of power supply and conducts, and a light emitting diode (high brightness The configuration is provided with LEDs 2, 4, and 6).

According to such a configuration, the capacitor is charged by power supply from a power supply such as a commercial AC power supply, and the power of the capacitor is smaller than the power supply in an emergency. When the power supply is stopped, the switching means conducts, and the capacitor and the light emitting diode constitute a closed circuit via the conducting switching means. As a result, the capacitor discharges through the light emitting diode, and this discharge current becomes the driving current of the light emitting diode. Therefore, in an emergency, the light emitting diode is lit.

In order to achieve the above object, in the emergency light according to the present invention, the capacitor may be an electric double layer capacitor (DLC 8, 10). That is, the electric double layer capacitor is small in size and excellent in the function of accumulating electric charge, and is suitable for an emergency power supply.

In order to achieve the above object, the emergency light according to the present invention may be configured to include a light emitting diode 18 that is turned on by receiving a charging current flowing through the capacitor when charging the capacitor. That is, the charging of the capacitor can be known from the charging current. Therefore, if this charging current is supplied to the light emitting diode, it is possible to confirm whether the light emitting diode is being charged or not and whether there is a supply of AC input or not, depending on whether the light emitting diode is on or off.

In order to achieve the above object, the emergency light according to the present invention may be configured such that a housing 54 is provided with an energizing plug (AC plug 56) and a light emitting portion of the light emitting diode. Good. That is, the housing of the emergency light can be attached to the outlet using a plug, and the capacitor can be charged by power supply from an AC power supply or the like. The status of the charging can be confirmed from the light emitting unit on the housing. As described above, the advantages and effects of the emergency light of the present invention are listed as follows.

(1) Compared to those using incandescent lamps and batteries, maintenance is easier and the service life is longer, and running costs can be reduced. o

(2) It is possible to obtain high-intensity light emission with low power consumption, and realize a bright emergency light.

The objects, features, and advantages of the present invention will become more apparent by referring to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a circuit diagram showing an emergency light circuit according to an embodiment of the emergency light of the present invention. FIG. 2 is a front view showing the external shape of the emergency light.

Fig. 3 is a side view showing the external shape of the emergency light. BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of an emergency light according to the present invention will be described with reference to FIG. FIG. 1 shows an emergency light circuit according to an embodiment of the emergency light of the present invention.

The emergency light 1 is provided with an emergency light circuit 3 as a lighting circuit. The emergency light lighting circuit 3 includes, for example, a high-intensity light emitting diode (LED) 2 as one or more light sources in an emergency. , 4 and 6 are installed. In the event of an emergency, as a capacitor constituting an emergency power supply that supplies a driving current to these high-brightness LEDs 2 to 6, for example, an electric double layer capacitor (DLC) 8, 10 ing. These DLCs 8 and 10 are connected to a charging circuit 14 that is charged during power supply, for example, by a commercial AC power supply 12. In addition, a switching circuit is installed to detect and switch between normal power and emergency power such as when power supply is stopped.It also displays the charging or charging status of the DLC 8, 10 while charging, as well as being installed. Eighteen light emitting diodes (LEDs) are installed as display elements.

The emergency light circuit 3 according to this embodiment is supplied with power by being connected to the AC power supply 12 to the power supply terminals 20 and 22 to which the AC plug 56 (FIG. 3) is connected. In the section, a resistor 24.26 and a film capacitor 28 are installed as filters for removing ripples and the like. The charging circuit 14 is provided with a diode bridge 30 for performing full-wave rectification as a first rectifier circuit, and the DC output of the diode bridge 30 is provided. On the power side, DLCs 8 and 10 are connected in series via LEDs 18 for charging display, and each DLC 8 and 10 has a variable shunt regulator as a constant voltage element to prevent overcharge. 32, 34 are connected in parallel. A variable diode may be used in place of the variable shunt regulators 32, 34.

Each DLC 8, 10 is charged by the DC output of the diode bridge 30, but its charging voltage is suppressed to a constant voltage by the variable shunt regulators 32, 34, and the DLC 8, 10 is overcharged. 0 is hidden. Then, as a result of the charging current of the DLC 8, 10 flowing through the LED 18, the LED 18 lights up, indicating that the DLC 8, 10 is being charged, that is, being energized.

The switching circuit 16 is composed of NPN-type transistors 36, 38, etc. as switching elements, and a diode bridge 30 as a DC power supply is provided on the base side of the transistor 36 on the preceding stage. A diode 40 as a second rectifier circuit and a capacitor 42 for smoothing the rectified output are installed separately from the DC output from the diode 40 cathode and the capacitor 4. Eighty-six bases are supplied via resistors 44. And, between the diode 40 and the AC power supply 12, a film capacitor 28 as a voltage drop means is interposed, and as described above, without the current loss etc. For example, an AC voltage of 5 [V] is applied to the diode 40. The collector of the transistor 36 is connected to the base of the transistor 38 on the next stage; the transistor 36 is connected to the base of the transistor 38 when the transistor 36 is turned on. The output of the charging circuit 14 is supplied via a resistor 46. In addition, between the collector of the transistor 38 and the output side of the charging circuit 14, EDs 2 to 6 having high brightness are connected in parallel via resistors 48, 50 and 52, respectively.

Next, the appearance of the emergency light 1 will be described with reference to FIGS. The emergency light 1 includes, for example, a housing 54 having a trapezoidal external shape as shown in FIGS. 2 and 3, and the emergency light circuit 3 shown in FIG. ing. The housing 54 is provided with an AC plug 56 connected to the power supply terminal 20.2.2, and the ceiling side is provided with a light-emitting portion of the high-brightness LEDs 2 to 6, and , On the lower surface side, a light emitting portion of the LED 18 for charging display is provided.

With such a configuration, the charging mode is achieved by inserting the AC plug 56 into the outlet. In this charging mode, the DLCs 8, 10 are charged by the charging current supplied from the diode bridge 30, and the LEDs 18 are illuminated by the charging current during the charging. Under normal conditions, when AC power is supplied to the power supply terminals 20 and 22, the AC impedance of the film capacitor 28 etc. can reduce the voltage with low loss, and the resistors 24 and 26 are connected to the AC plug. The electric charge stored in the film capacitor 28 is consumed when the 56 is pulled out, so that there is no electric shock even if the user touches the AC plug 56.

In addition, the AC power supply 12 is rectified by the diode 40 and the DC output smoothed by the capacitor 42 is applied to the base of the transistor 36, so that the transistor 36 becomes conductive. When the transistor 36 is turned on, the transistor 38 is turned off, that is, turned off, and the high-brightness LEDs 2 to 6 are turned off. Normally, when the LED 18 is lit brightly, that is, when the DLC 8, 10 is charged, the high brightness LEDs 2 to 6 are turned off.

In the event of a power failure, the charging power of the DLCs 8 and 10 is released and the LED 18 is turned off, and the base input power of the transistor 36 is released. Transistor 38 is opened and the charging voltage of DLC 8, 10 is applied to the base of transistor 38. As a result, the transistor 38 conducts, the DLC 8, 10 discharges through the high-intensity LEDs 2 to 6 and the transistor 38, and the high-intensity LEDs 2 to 6 are lit by the discharge current. This lighting continues until the discharge of DLC 8, 10 is completed.

Also, besides a power failure, when the AC plug 56 is unplugged from the outlet and the AC power supply 12 from the power supply terminals 20 and 22 is released, the charging state is released and the DLC 8, 1 0 discharge causes high brightness and ED 2 to 6 powers.

In this way, the DLC 8, 10 can be normally charged with the DC obtained from the AC power supply 12, etc., and in the emergency, the charge can be released and the high-brightness LEDs 2 to 6 can be turned on. Can be used as In this case, since the high-brightness LEDs 2 to 6 are used as the light source, the current consumption is low, and the discharge current of DLC 8, 10 is used. For a long time. Compared with incandescent lamps, LEDs have a long service life and the DLC 8, 10 used for power supply can withstand repeated charging and discharging, so there are few failures and there is no trouble to replace. However, the ability to reduce running costs as well as extending the service life is possible.

The high-brightness LEDs 2 to 6 can use various luminescent colors, but if they use red light, they can be used as signal lights, etc. Illumination light close to natural light can be realized.

In the present embodiment, since the AC power supply 12 is used, the diode bridge 30 is used for the diode 40 charging circuit 14, and the DC power supply is used instead of the AC power supply 12. When power is supplied, rectifying means such as a diode 40 and a diode bridge 30 are not required.

In the embodiment, DLC 8, 10 is used as the capacitor, but an electrolytic capacitor or the like other than DLC may be used.

Further, as described above, the most preferred embodiments of the present invention have been described. However, the present invention is not limited to the above description, but is described in the scope of claims or the best mode for carrying out the invention. It is needless to say that various modifications and changes can be made by those skilled in the art based on the gist of the invention disclosed in the embodiment, and it is needless to say that such modifications and changes are included in the scope of the present invention. No. Industrial applicability

Advantageous Effects of Invention According to the present invention, maintenance is facilitated, the life is extended, and in addition to the reduction of running cost, power saving and high-luminance light emission are achieved, which contributes to performance.

Claims

1. A capacitor that is charged when power is supplied,

Switching means for detecting conduction stop and conducting.

A light emitting diode that is lit by the discharge of the capacitor when the switching means is turned on;

Emergency light with configuration.

of

2. The emergency light according to claim 1, wherein the capacitor is an electric double layer capacitor. Enclosure

3. The emergency light according to claim 1, wherein the emergency light is provided with a light emitting diode that is lit by receiving a charging current flowing through the capacitor when charging the capacitor.

4. The emergency light according to claim 1, wherein a power supply plug and a light emitting portion of the light emitting diode are provided in a housing.