JPS5837664B2 - Fluorescent lamp with glow starter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluorescent lamp with a glow starter.More specifically, the present invention relates to a fluorescent lamp with a glow starter. This relates to a fluorescent lamp with a glow starter, characterized in that an electrode 10 is disposed on a filament electrode D so as to be able to come into contact with and separate from it, and a heat shielding plate 17 is provided between the filament 5 and the movable electrode 10. be.

Structure of conventional fluorescent lamp A, structure of glow starter B,
and glow starter circuit C are shown in FIGS. 1, 2, and 3, respectively.

As shown in FIG. 1, a conventional fluorescent lamp A has a structure in which a fluorescent material 2 is thinly and evenly coated on the inner surface of a glass tube 1.

A stem 3 is sealed to both ends of the glass tube 1, and a tungsten filament 5 supported by a lead wire 4 (nickel, etc.) is coated with an electron emitting material (Bas S r , an oxide mainly composed of Ca) to form a filament. An electrode D is formed.

Both ends of the glass tube 1 have a cap 7 having two cap pins 6.
It is equipped with

Furthermore, mercury particles and a rare gas are sealed in the glass tube 1 after evacuation.

The structure of glow starter B is neon, as shown in Figure 2.
Or put U in the gross starter tube 9 filled with argon gas.
A bimetallic movable electrode 10 and a fixed electrode 11 are sealed facing each other, and are used in a connection as shown in FIG.

The operating principle of this lighting circuit E will be explained. First, power supply circuit 8
When switch SW is closed, both electrodes 1 of glow starter B
Glow discharge occurs for 0.11 seconds, and the movable electrode 10 made of bimetal expands due to the heat generated by this glow discharge.
The contact portion 12 contacts the fixed electrode 11.

As a result, the filaments 5 of both filament electrodes D of the fluorescent lamp A are connected in series, and a current of about 1.5 to 2 times the rated discharge current flows through them, heating the filaments 5 and emitting thermionic electrons. become possible.

Meanwhile, during this time, the movable electrode 10 of the glow starter B cools and contracts, and the contact is finally opened.

Since the heating current is cut off at this moment, a high voltage induction kick is generated by the choke coil of the ballast F, which is applied between both filament electrodes D of the fluorescent lamp A, and combines with the heating effect of the filament 5. Fluorescent lamp A lights up.

The above is the lighting circuit E for fluorescent lamp A using glow starter B, which is the most commonly used conventional method. There were drawbacks such as the need for a lead wire C for wiring, and (1) maintenance of the glow starter B in the same way as the fluorescent lamp A.

The present invention was made in view of the drawbacks of the conventional example, and
The object of the present invention is to replace the conventional glow starter used to start a fluorescent lamp by forming a bimetallic one on one electrode part of the internal discharge space of the fluorescent lamp, and using the heat generated by the glow discharge. The object of the present invention is to provide a fluorescent lamp with a glow starter that has a starting function within the fluorescent lamp by incorporating a movable electrode that operates.

A first embodiment of the present invention will be described in detail below with reference to FIG.

A stem 3 sealed to one end of the glass tube 1 is provided with a lead wire 4 for supporting a tungsten filament 5 and a movable electrode 10 made of bimetal.

Further, one IJ single wire 4 functions as a fixed electrode 11.

The lead wire 4 and the movable electrode 10 are electrically connected to the base pin 6 and connected to an external circuit.

In addition, in order to prevent the movable electrode 10 from malfunctioning due to the heat generated from the filament 5 after the fluorescent lamp A is turned on, a disk-shaped heat shielding plate 17 is attached to the lead wire 4 that the movable electrode 10 comes into contact with. establish.

The fluorescent lamp A shown in FIG. 4 is then connected as shown in FIG.

First, when the switch SW of the power supply circuit 8 is closed, a glow discharge occurs between the movable electrode 10 made of bimetal and the lead wire 4 which acts as the fixed electrode 11. The movable electrode 10 stretches due to the heat generated by this glow discharge, and the lead wire 4 and Contact.

As a result, the filaments 5 of both filament electrodes D of the fluorescent lamp A are connected in series, and approximately 2
Double the current flows, heating the filament 5 and putting it in a state where it can emit thermionic electrons.

Meanwhile, during this time. Then, the movable electrode 10 cools and contracts, and the contact is finally opened.

Since the heating current is cut off at this moment, a high-voltage induction kick is generated by the choke coil of the ballast F, which is applied between the electrodes D of the fluorescent lamp A, and combines with the heating effect of the filament 5 to produce a high voltage induction kick. Light lamp A lights up.

Next, a second embodiment of the present invention will be described with reference to FIG.

A lead wire 4 for supporting a tungsten filament 5 and a movable electrode 10 made of bimetal are formed on a stem 3 sealed to one end of the glass tube 1.

One lead wire 4 is electrically connected to the cap pin 6, and the other lead wire 4 serves as a fixed electrode 11 and is not electrically connected to the cap pin 6. As in the first embodiment, a heat shielding plate 17 is provided on the lead wire 4 that serves as the fixed electrode 11.

Further, a conductive film 26 (so-called inner surface stripe) is applied in stripes on the inner surface of the glass tube 1, and one end thereof is electrically connected to a movable electrode 10 made of bimetal.

A slam 3 is similarly sealed to the other end of the glass tube 1, and a tungsten filament 5 is supported by a lead wire 4.

One of the lead wires 4 is connected to the base pin 6, and the other lead wire 4 is electrically connected to the other end of the conductor coating 26.

The fluorescent lamp A shown in FIG. 5 is connected as shown in FIG. 7.

This lighting circuit E operates in the same manner as described in the first embodiment.

The difference from Embodiment 1 is that a striped conductor coating 26 is applied to the inner surface of the fluorescent lamp A, and the number of pinot caps 6 is one.

As described above, in the present invention, electrodes are disposed facing each other in a glass tube, a bimetal for glow discharge is disposed so as to be able to come into contact with and separate from the electrodes, and a heat shield is provided between the filament and the movable electrode. Since the closing plate is provided, (a) there is no need for a glow starter to start the fluorescent lamp, and at the same time there is no need for a socket for the glow starter, resulting in a resource saving effect.

(Example) Since the glow starter function is built into the fluorescent lamp, there is no need to maintain the glow starter like before.

(In the conventional system, the life of the fluorescent lamp and the life of the glow starter are almost the same, and it was necessary to replace the glow starter when replacing the fluorescent lamp.

) Furthermore, even though the movable electrode is provided with the function of a glow starter as described above, the presence of the heat shielding plate prevents the movable electrode from malfunctioning due to the heat generated by the filament.

In the case of the second embodiment, since a conductive film (inner surface stripe) is provided inside the fluorescent lamp, the external circuit is simplified.

In addition, since the fluorescent lamp has only one base pin, there is no need for directionality when attaching the fluorescent lamp to a fixture, improving work efficiency.

As Example 3, both electrodes D of Example 2 are used as shown in FIG.
Instead of the conductor coating 26 connecting the glass tube 1, the conductor coating 26 may be applied to the outer surface of the glass tube 1 and connected externally via the cap pins 6 on both sides.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a conventional fluorescent lamp, FIG. 2 is a front view of a conventional glow starter, FIG. 3 is a lighting circuit diagram of a conventional example, and FIG. 4 is a front view of a conventional fluorescent lamp. FIG. 5 is a partially cutaway front view of the first embodiment, FIG. 5 is a partially cutaway hemogram of the second embodiment, FIG. 6 is a lighting circuit diagram of the fluorescent lamp shown in FIG. 4, and FIG. 7 is a partially cutaway front view of the first embodiment. A lighting circuit diagram of a fluorescent lamp shown in FIG.
FIG. 8 is a schematic front view of a third embodiment of the fluorescent lamp of the present invention, in which 1 is a glass tube, 10 is a movable electrode, and D is a filament electrode.

Claims (1)

[Claims] 1 Filament electrodes are arranged facing each other in a glass tube, and a bimetallic movable electrode for glow discharge is arranged so as to be able to come into contact with and separate from the filament electrode, and a heat shield plate is provided between the filament and the movable electrode. A fluorescent lamp with a glow starter characterized by comprising: