JPH041629Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a discharge lamp apparatus for lighting a discharge lamp such as a fluorescent lamp at high frequency, and is concerned with countermeasures against emitter consumption of the discharge lamp.

[Background technology]

As shown in FIG. 3, a conventional discharge lamp device is constructed by attaching lamp sockets 11 to both ends of a device body (not shown) containing an inverter-type ballast, covering the device body with a reflector 12, and tightening the lamp socket with a thumbscrew 13. After fixing, the rapid start type discharge lamp 14
It becomes attached.

This discharge lamp fixture is used by being set on a ceiling surface, and the tube axis of the discharge lamp 14 is horizontal.

As shown in FIG. 4, the discharge lamp 14 described above has two wire-like filament support fittings 3 and 4 implanted at the tip of a glass stem 2 provided at the end of a glass tube 1. A filament 5 is installed between both ends of the filament support fittings 3 and 4, and two wire-like flexible plates are supported on both outsides of the filament support fittings 3 and 4 at the tip of the glass stem 2. An oval ring-shaped metal shield plate 8 is attached to the metal fittings 6 and 7, and this shield plate 8
It has a structure in which the filament 5 is surrounded around the tube axis.

When the discharge lamp 14 is attached to a discharge lamp apparatus, the filament support fittings 3 and 4 are arranged horizontally, and the filament 5 is horizontally installed between the filament support fittings 3 and 4, and the filament support fittings 3 and 4 are horizontally arranged between the filament support fittings 3 and 4, and the filament support fittings 3 and 4 are horizontally arranged between the filament support fittings 3 and 4. The plate support fittings 6 and 7 are arranged horizontally, and a ring-shaped stiffening plate 8 is attached to the stiffening plate support fittings 6 and 7 so as to surround the filament 5 with the long axis direction being horizontal. . Also, the base 9
A pair of pins 10, 10 provided in the discharge lamp 14
are lined up horizontally with the lamps attached to the lamp sockets 11.

The purpose of the above-mentioned shield plate 8 is to prevent the emitter material (oxide) applied to the filament 5 from scattering and adhering to the tube wall of the glass tube 1, thereby preventing the end of the glass tube 1 from becoming black. It was established in

Discharge lamp 1 used in the above-mentioned discharge lamp equipment
4 is lit at high frequency, but at the end of its life, the filament 5 becomes emitter exhausted (half-wave discharge state). That is, most of the emitter material applied to the filament 5 is scattered, and the filament no longer emits electrons, thereby eliminating discharge in this direction.

If such a state continues for a long period of time, the filament 5 and the filament support fittings 3 and 4 will generate abnormal heat, and the filament 5 will eventually break, and as a result, electrical discharge to the filament support fittings 3 and 4 will begin. , the amount of heat generated will further increase due to the discharge to the filament support fittings 3 and 4. As a result, the glass stem 2 begins to melt, and the holding force of the stem 2 to the flexible plate supports 6 and 7 decreases, and the weight of the flexible plate 8 causes the stem 2 to melt in the direction of gravity (arrow The shield plate support fittings 6 and 7 (shown as A) hang down,
The shielding plate 8 contacts both ends of the filament 5, causing a short circuit between both ends of the filament 5, which may burn out the filament winding of the oscillation transformer of the inverter ballast (not shown) or destroy the oscillation transistor. There was a problem. Generally speaking, in a rapid start type inverter ballast, if the filament winding is shorted, the filament winding will receive 15A~15A.
A current of 20A will flow.

[Purpose of invention]

The object of this invention is to provide a discharge lamp apparatus that can prevent short circuits between both ends of the filament due to the shingle plate.

[Disclosure of invention]

The discharge lamp device of this invention has a filament support fitting and a shield plate support fitting installed in the stem provided at the end of the tube, a filament is attached to the filament support fitting, and the filament is made of metal that surrounds the filament around the tube axis. In a high-frequency lighting type discharge lamp apparatus in which a discharge lamp with a Noshiyahei plate attached to the Shiyahei plate support fitting is mounted so that the tube axis direction is horizontal, the length direction of the filament is vertical. The present invention is characterized in that the discharge lamp is mounted in such a manner that

In this way, when a discharge lamp is installed so that the tube axis direction is horizontal, in a case where a filament is installed, it is assumed that the discharge lamp is installed so that the length direction of the filament is vertical. Even if the shield plate comes into contact with the filament due to the hanging of the shield plate support metal fitting, it will only come into contact with the filament at one end (the upper end) and the other end (the lower end) Since there is no contact, short circuits between both ends of the filament can be prevented.

Embodiment An embodiment of this invention will be explained based on FIGS. 1 to 3. As shown in Fig. 3, this discharge lamp fixture is constructed by attaching lamp sockets 11 to both ends of a fixture body (not shown) containing an inverter type ballast, covering the fixture body with a reflector plate 12, and fixing it with thumbscrews 13. After that, a rapid start type discharge lamp 14 is installed.

This discharge lamp fixture is used by being set on a ceiling surface, and the tube axis of the discharge lamp 14 is horizontal.

As shown in FIG. 2, the discharge lamp 14 described above has two wire-shaped filament support fittings 3 and 4 implanted at the tip of a glass stem 2 provided at the end of a glass tube 1. A filament 5 is installed between both ends of the filament support fittings 3 and 4, and two wire-like flexible plates are supported on both outsides of the filament support fittings 3 and 4 at the tip of the glass stem 2. The metal fittings 6 and 7 are installed, and an oval ring-shaped metal bending plate 8 is attached to the bending plate support fittings 6 and 7, and the filament 5 is fixed to the tube axis by the bending plate 8. It has a surrounding structure.

When the discharge lamp 14 is attached to a discharge lamp apparatus, the filament support fittings 3 and 4 are arranged vertically, and the filament 5 is arranged vertically between the filament support fittings 3 and 4, as shown in FIG. 2A. The support metal fittings 6 and 7 are installed in the direction of the
are arranged horizontally, and a ring-shaped shear plate 8 is attached to the shear plate supports 6 and 7 so as to surround the filament 5 with its long axis vertical. In addition, a pair of pins 1 provided on the base 9
0 and 10 also connect the discharge lamp 14 to the lamp socket 11.
They are lined up horizontally when installed.

The purpose of the above-mentioned shield plate 8 is to prevent the emitter material (oxide) applied to the filament 5 from scattering and adhering to the tube wall of the glass tube 1, thereby preventing the end of the glass tube 1 from becoming black. It was established in

Discharge lamp 1 used in the above-mentioned discharge lamp equipment
4 is lit at high frequency, but at the end of its life, the filament 5 becomes emitter exhausted (half-wave discharge state). That is, most of the emitter material applied to the filament 5 is scattered, and the filament no longer emits electrons, thereby eliminating discharge in this direction.

If such a state continues for a long period of time, the filament 5 and the filament support fittings 3 and 4 will generate abnormal heat, and the filament 5 will eventually break, and as a result, electrical discharge to the filament support fittings 3 and 4 will begin. , the amount of heat generated will further increase due to the discharge to the filament support fittings 3 and 4. As a result, the glass stem 2 begins to melt, and the holding force of the stem 2 to the flexible plate supports 6 and 7 decreases, and the weight of the flexible plate 8 causes the stem 2 to melt in the direction of gravity (arrow The shield plate support fittings 6 and 7 (indicated by A) hang down.

However, since the filament support fittings 3 and 4 are arranged vertically and the filament 5 is installed vertically, the stiffening plate 8 comes into contact with the filament 5 due to the hanging of the stiffening plate supporting fittings 6 and 7. Even if this occurs, the contact occurs only at one end (upper end) of the filament 5, and the other end (lower end) of the filament 5 does not come into contact, thus preventing a short circuit between both ends of the filament 5. be able to. As a result, the problems of burning out the filament winding of the oscillation transformer of the inverter type ballast and destroying the oscillation transistor can be solved.

The pins 10, 10 may be arranged vertically as shown in FIG. 2B when attached to the discharge lamp apparatus. The discharge lamp 14 is arranged so that the length direction is in the vertical direction.
All you have to do is place the .

Furthermore, although the above embodiments have been described with respect to straight tube lamps, the present invention can also be applied to annular lamps, U-shaped lamps, and the like.

[Effect of idea]

The discharge lamp device of this invention is characterized in that the discharge lamp is mounted so that the tube axis direction is horizontal, and the discharge lamp is mounted so that the length direction of the filament is vertical. Even if the shield plate comes into contact with the filament due to hanging of the shield plate support fitting, it will only touch one end (upper end) and not the other end (lower end), so the filament can prevent short circuits between both ends.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts of an embodiment of this invention, Fig. 2 is a schematic diagram showing the positional relationship of filaments, Fig. 3 is an external perspective view of the embodiment and the conventional example, and Fig. 4 is the conventional example. FIG. 3 is a perspective view of main parts. 1... Glass tube, 2... Stem, 3, 4... Filament support fitting, 5... Filament, 6,
7...Shiyahei plate support fittings, 8...Shiyahei board,
14...discharge lamp.

Claims (1)

[Scope of utility model registration request] A filament support fitting and a shingle plate support fitting are implanted in the stem provided at the tube end, a filament is attached to the filament support fitting, and a metal baffle plate is provided to surround the filament around the tube axis. In a high-frequency lighting type discharge lamp appliance in which a discharge lamp is mounted on a flexible plate support fitting so that the tube axis direction is horizontal, the discharge lamp is installed so that the length direction of the filament is vertical. A discharge lamp device characterized by: