JPH0431683Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to lighting equipment.

[Background technology]

In order to prevent flickering caused by the power frequency at the tube end of a fluorescent lamp, it is known to place a magnet near the electrode. However, the anti-flicker effect is affected by the position of the spot on the electrode.
When close to the magnet, the flicker prevention effect is remarkable, but as you move away from the magnet, the magnetic force weakens and the flicker prevention effect decreases. For this reason,
If the position of the spot moves with time, there is a drawback that even if the flicker prevention effect is set high, the flicker prevention effect fluctuates over time.

[Purpose of invention]

The purpose of this invention is to provide a lighting fixture that can maintain a constant flicker prevention effect caused by the power frequency regardless of changes over time.

[Disclosure of invention]

This invention consists of a pair of fluorescent lamps arranged in parallel with each other and with their respective electrodes parallel to the direction in which they are arranged, and a pair of fluorescent lamps arranged in the vicinity of the electrodes of the fluorescent lamps between these lamps. a magnet for supplying a magnetic field, the spot of the electrode of one fluorescent lamp is formed on the side close to the magnet, and the spot of the electrode of the other fluorescent lamp is formed on the side far from the magnet. It is characterized by being wired.

According to this invention, since the magnet is arranged near the electrode between a pair of fluorescent lamps, it is possible to prevent flickering at low cost by sharing the magnet, and the position of the spot on the electrode of the fluorescent lamp is different from that of one fluorescent lamp. By making the lamp move closer to the magnet and the other fluorescent lamp moving away from the magnet, even if the spot moves on the electrode over time, the spot that is close to the magnet will move away. Objects located further away in the direction move toward each other, so that the initial anti-flicker effect can be maintained as a whole.

Embodiment An embodiment of this invention will be explained based on FIGS. 1 to 4. That is, in this tabletop lighting fixture, a stand base 2 is attached to a table 1 using a clamping member or the like, the base end 4 of a flexible arm 3 is supported on the stand base 2, and a fixture that also serves as a shade is attached to the upper end of the flexible arm 3. Install main body 5. The appliance body 5 has lamp sockets 6 at both ends.
A pair of fluorescent lamps 7 and 8 are attached to the. These fluorescent lamps 7 and 8 are arranged in parallel, and in particular, the electrodes 9 of the fluorescent lamps 7 and 8 are positioned parallel to the direction in which the fluorescent lamps 7 and 8 are arranged. Further, magnets 10 and 11 are arranged near the electrode 9 between a pair of fluorescent lamps 7 and 8, and the magnetic poles N and S of each magnet 10 and 11 are viewed from the front in FIG. 3rd to show
Arrange them so that they face each other as shown in the diagram. In this way, the blackening 12 generated in the fluorescent lamps 7 and 8 can be directed toward the back side of the device main body 5 and can be made invisible from the front side of the device.

Fig. 4 shows a wiring diagram of this lighting equipment, 13 is a power supply, 14 and 15 are ballasts, 16 and 17 are glow lamps, and the wiring is connected to the electrode 9 of the fluorescent lamp 7 and the power supply to the magnets 10 and 11 side. 13 and the ballast 14 are connected, and the glow lamp 16 is connected to the opposite side. Further, regarding the electrode 9 of the fluorescent lamp 8, the connecting ends of the ballast 15 and the power source 13 are connected to the opposite side of the magnet 11, and the glow lamp 17 is connected to the magnet 11 side. Therefore, the spots 18, 1 of each electrode 9 of the fluorescent lamps 7, 8
9 is as shown in FIG. 4, the spot of the fluorescent lamp 7 is close to the magnets 10 and 11, and the spot 19 of the fluorescent lamp 8 is close to the magnets 10 and 11.
It will be located far away from. On the other hand, due to changes over time, the electrode 9
If the positions of upper spots 18 and 19 move,
The fluorescent lamp 7 is directed away from the magnets 10 and 11, and the fluorescent lamp 8 is directed toward the magnets 10 and 11. The effect of preventing flicker caused by the power frequency by the magnets 10 and 11 is as follows: spots 18 and 19
There is a tendency for the effect to be higher as it is closer to the magnets 10 and 11, but even if there is a change over time, one will approach relatively and the other will move away, so the flicker prevention effect will be maintained at the same level as the initial flicker prevention effect.

Note that the connection of the fluorescent lamps 7 and 8 is not limited to the above embodiment, but may be connected such that the polarities appearing at the ends of the tubes are opposite to each other.

[Effect of idea]

According to this invention, since the magnet is arranged near the electrode between a pair of fluorescent lamps, it is possible to prevent flickering at low cost by sharing the magnet, and the position of the spot on the electrode of the fluorescent lamp is different from that of one fluorescent lamp. By making the lamp move closer to the magnet and the other fluorescent lamp moving away from the magnet, even if the spot moves on the electrode over time, the spot that is close to the magnet will move away. Objects located far away in the direction move toward each other, so that the initial flicker prevention effect can be maintained as a whole.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view of one embodiment of this invention, Fig. 2 is a front view of the main body of the instrument, and Fig. 3 is Fig. 2-
The line sectional view and FIG. 4 are connection diagrams. 7, 8...Fluorescent lamp, 9...Electrode, 10,1
1...Magnet, 18, 19...Spot.

Claims (1)

[Scope of utility model registration request] a pair of fluorescent lamps arranged in parallel with each other and with their respective electrodes parallel to the direction in which they are lined up, and a magnetic field arranged between these fluorescent lamps in the vicinity of the electrodes of the fluorescent lamps to supply a magnetic field to each fluorescent lamp; and a magnet, and wires are connected so that the spot of the electrode of one fluorescent lamp is formed on the side closer to the magnet, and the spot of the electrode of the other fluorescent lamp is formed on the side farther from the magnet. Featured lighting equipment.