JPS6321849Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to lighting equipment.

2. Description of the Related Art Among lighting fixtures, for example, disaster prevention lighting fixtures, which include a high frequency inverter within the fixture body are well known. This means that the discharge lamp is normally lit by a commercial AC power source, and when the commercial AC power source is cut off in an emergency situation, the built-in battery is used as a power source to operate the high frequency inverter, and the high frequency inverter is operated as a power source for future high frequency output. Therefore, the discharge lamp is turned on. By the way, this type of lighting equipment is required to display the voltage status of the battery using an indicator light. For example, when the battery voltage drops below a specified value, the indicator light is turned on.

Figure 1 shows a conventional lighting fixture, where 1 is the fixture body, 2 is a discharge lamp installed across the fixture body, and 3 is a ballast used when lighting the discharge lamp 2 with a commercial AC power source. , 4 is a case containing a high-frequency inverter that operates using a battery as a power source, a detection device for detecting battery voltage, etc., and 9 is a storage battery built into the main body 1 of the device. Actually, the case 4 has a built-in circuit configuration as shown in FIG.

In the figure, 11 is a full-wave rectifier that performs full-wave rectification of the voltage of the commercial AC power supply 12; 13 is a battery charged by the rectified voltage from the full-wave rectifier 11;
Reference numeral 4 denotes a high frequency inverter that operates using the battery 13 as a power source, and the discharge lamp 2 is lit in an emergency by the high frequency output from this inverter. 15 is a comparator, battery 13
The voltage of the reference power source 16 is compared with the voltage of the reference power source 16. Then, when the battery voltage becomes lower than the voltage of the reference power source 16, the output of the comparator 15 turns on the indicator light (for example, a light emitting diode) 17. In the conventional configuration, the case 4 houses circuits other than the commercial AC power supply 12 and the indicator light 17 shown in FIG.

The indicator light 17 is installed so as to be exposed from the wall (bottom wall) 1A of the appliance main body 1, and is easily visible from below. A lead wire 5 connects the case 4 and the indicator light 17, and is wired along the inner wall of the appliance body 1.

However, according to the conventional configuration described above, the lead wire 5
Since a high frequency inverter 14 is present near the lead wire 5, high frequency waves may be induced in the lead wire 5 due to the high frequency output generated by the high frequency inverter 14 when it operates. Therefore, the indicator lamp 17 may be erroneously lit due to this induced high-frequency output.

The purpose of this invention is to prevent the indicator lamp from being erroneously lit due to induction by the high frequency output from the high frequency inverter.

An embodiment of this invention will be explained with reference to FIGS. 2 and 3. Note that parts given the same reference numerals as in FIG. 1 indicate the same or corresponding parts. In this design, indicator light 1
7 is not used as an indicator light, but is simply used as a light source 6. This light source 6 is housed in the case 4 together with at least a high frequency inverter 14 and a comparator 15. For example, if the printed circuit board 7 on which the high frequency inverter 14 etc. is installed is installed inside the case 4,
A light source 6 is installed on this printed circuit board 7 (see FIG. 3). An optical fiber 8 is prepared, with one end surface 8A facing the light source 6 and the other end surface 8B directed outward from the wall 1A of the instrument main body 1. Optical fiber 8 is arranged along the inner wall of instrument body 1 .

In the above configuration, when the voltage of the battery 13 becomes lower than the voltage of the reference power source 16, the light source 6 lights up like the indicator light 17 lights up. The light from this point on is transmitted by the optical fiber 8 from one end surface 8A to the other end surface 8B. Therefore, the end face 8B
When viewed from the outside, it appears bright and shiny. This makes it possible to determine that the light source 6 has been turned on, that is, that the voltage of the battery 13 has fallen below the reference voltage.

In this case, since the optical fiber 8 is made of an insulating material such as resin, even if it is installed in the device body 1, high frequency waves will not be induced when the high frequency inverter 14 is operated. Even so, the end face 8B does not shine brightly. In other words, no erroneous visual recognition occurs.

Note that this type of lighting equipment may have a waterproof structure, in which case the indicator light 17 is installed as shown in Figure 1.
When installing on the wall 1A, the installation structure needs to be waterproof. For this purpose, the socket of the indicator light 17 and other parts must be made waterproof, which is a complicated structure. However, if the optical fiber of this invention is used, there is no need for a waterproof socket, and therefore the display structure has the advantage that it can be manufactured at low cost.

As detailed above, this invention has the effect of reliably preventing erroneous display due to induction of high frequency output.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional example, Fig. 2 is a front view showing an embodiment of this invention, Fig. 3 is a front sectional view of main parts,
FIG. 4 is a circuit diagram. 1... Appliance body, 1A... Wall, 2... Discharge lamp,
4... Case, 6... Light source, 8... Optical fiber,
8A, 8B... end face, 14... high frequency inverter.

Claims (1)

[Scope of utility model registration request] A high-frequency inverter that emits high-frequency output necessary for high-frequency lighting of a discharge lamp is housed in a case together with a light source that turns on when the voltage of a battery that serves as a power source for the high-frequency inverter falls below a standard value,
A lighting fixture, wherein the case is installed inside the fixture body, and the end face of the optical fiber that transmits light from the light source is placed facing outside from the wall surface of the fixture body.