JP3103710B2 - Incandescent light bulb and incandescent light bulb with reflector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incandescent lamp used for stage lighting, studio lighting, hall lighting and the like, and an incandescent lamp with a reflector.

[0002]

2. Description of the Related Art Hitherto, as a high-power halogen bulb used for studio lighting, one having a configuration as shown in FIG. 5 is known. That is, metal foils 3 and 4 made of molybdenum are embedded in a sealing portion 2 provided at one end of the glass bulb 1, and external lead wires 8 and 9 are connected to each end of the metal foils 3 and 4. , 4 are connected to internal leads 5, 6, respectively, and a filament 7 is stretched between the internal leads 5, 6. A fuse 23 is connected to one external lead 8, the other end of the fuse 23 is connected to a power supply pin 24 of the base 12, and a metal wire 25 having no fuse function is connected to the other external lead 9. The other end of the metal wire 25 is connected to a power supply pin 26 of the base 12.

The purpose of providing the fuse 23 is to generate heat inside the glass bulb 1 by heat generated by arc discharge generated between the coils of the filament 7 when the filament 7 is broken or between the filament 7 and the internal lead wires 5 and 6. To prevent the glass bulb 1 from breaking due to the expansion of the gas and the breakage of the glass bulb 1. The fuse 23 is blown with a large current flowing by the arc discharge, thereby interrupting the continuation of the arc discharge. It is in.

[0004] A halogen lamp having such a configuration is
As shown in FIG. 6, pins 24 and 2 of the base 12 are attached to a socket 29 disposed behind a reflecting mirror 28 in the lighting fixture 27.
6 is installed in the reflecting mirror 28.

[0005]

However, when such a conventional high-power halogen bulb is installed in a lighting fixture, a filament, an internal lead, a metal foil, an external lead,
Due to heat from a heat source such as a fuse, the pins of the base inserted into the socket and the contacts of the socket are corroded at high temperatures, increasing the contact resistance of the corroded parts.
Due to a vicious cycle of increased heat generation in the corroded portion and further corrosion, for example, in the case of a halogen lamp of 1000 W, the temperature near the external lead wire was initially about 400 ° C., but was 600 ° C. during use. In use, the contact of the socket and the pin of the base may eventually burn, or the heat generated in the corroded portion may increase the temperature of the metal foil of the halogen bulb, causing the metal foil to oxidize and expand. There is a problem that cracks in the sealing part glass may be caused, or the sealed gas in the glass bulb may pass through the minute gaps on the metal foil to the outside and air may enter into the glass bulb. Was.

When the filament of the halogen lamp is broken and an arc discharge occurs, the fuse operates.
The lamp temperature is greatly affected by the position of the halogen bulb when it is turned on, and when the lamp is supported vertically upward,
The difference in the temperature of the sealing portion is 15 when compared with the case where the device is supported vertically downward.
The temperature may reach 0 ° C or higher. For this reason, there may be a large variation in the time from the occurrence of arc discharge to the filament until the fuse operates, and when the lamp is lit with the base supported upward, the arc discharge generated in the fuse portion may occur. As a result, a portion of the base and the glass bulb may be damaged due to rapid heat generation, which may cause damage to lighting equipment.

[0007]

According to the present invention, there is provided an incandescent lamp having a light-transmitting container having a sealing portion at at least one end, a metal foil embedded in the sealing portion, An inner lead extending inside the container, a filament provided between the inner leads, an outer lead led out of the sealing portion from the metal foil, and an end of the sealing portion
And a base extending from the external lead wire and
Comprising a feed line derived from serial mouthpiece, a fuse connected to at least one of the feed line, and a plug of the fuse is disposed within and connected to the feed line, prior to
The cap and the plug are separated from each other .

Further, the incandescent lamp with a reflecting mirror according to the present invention provides a light-transmitting container having a sealing portion at at least one end, a metal foil embedded in the sealing portion, and the light-transmitting container from the metal foil. An inner lead wire extending inside, a filament provided between the inner lead wires, an outer lead wire led out of the sealing portion from the metal foil, and an end portion of the sealing portion.
And a base extending from the external lead wire and
Tei comprising a feed line derived from serial mouthpiece, a fuse connected to at least one of the feed line, and a plug of the fuse is disposed within and connected to the feed line
And an incandescent lamp in which the base and the plug are separated from each other, and a reflector having an incandescent lamp mounting hole on a back surface thereof, wherein the incandescent lamp is positioned so that the filament is located in a focal range of the reflector. Are fixed to the incandescent lamp mounting holes.

[0009]

According to this configuration, when an incandescent light bulb with a lead wire is mounted in a lighting fixture, the plug is inserted into the socket at a location away from the incandescent light bulb, which constitutes most of the heat source. It can be much lower than the base temperature of conventional incandescent lamps, preventing corrosion and seizure of the power supply terminal of the plug and the contacts of the socket, and also reducing the temperature change near the fuse due to the lighting posture. The plug is not damaged even if the fuse is blown by an arc.

[0010]

FIG. 1 shows an embodiment of the present invention.
It is a partially cutaway front view of the halogen lamp of 00V and output 1000W.

As shown in FIG. 1, one end of a quartz glass bulb 1, which is a light-transmitting container in which a small amount of a halogen group element such as bromine or chlorine is sealed together with an inert gas such as nitrogen, argon, or krypton. The metal foils 3 and 4 made of molybdenum are embedded in the sealing portion 2 formed in the
The inner lead wires 5 and 6 extend from the inside 4 into the glass bulb 1, and a filament 7 is disposed between the tips of the inner lead wires 5 and 6. Further, external lead wires 8 and 9 are connected to the metal foils 3 and 4, respectively, and are led out of the glass bulb 1, and feed wires 10 and 11 are connected to the external lead wires 8 and 9, respectively. The power supply lines 10 and 11 extend from holes provided in the base 12, respectively, and a plug 15 having power supply terminals 13 and 14 is attached to the other end.

The power supply lines 10 and 11 are nickel-plated copper wires having a cross-sectional area of 0.75 mm ² and covered with a heat-resistant resin, and have a length from the end of the base 12 to the end of the plug 15 of 25 c.
m. As shown in FIG. 2, the plug 15 has a fuse 16 made of a Monel wire having a diameter of 0.4 mm provided therein.

FIG. 4 shows a halogen lamp having such a configuration.
As shown in (1), the plug 15 was attached to a lighting fixture configured to be inserted into a socket 17 located further back than the base 12. A halogen lamp having the same structure as the conventional halogen lamp of the embodiment of the present invention and having the structure shown in FIG. 5 and having the base 12 of GYX9.5 is shown in FIG.
It was attached to a lighting fixture as shown in FIG. Each lighting fixture was supported such that the plug 15 and the base 12 were vertically upward and downward, respectively.

Thereafter, the temperature of the power supply terminal 13 of the plug 15 of the halogen lamp according to the embodiment of the present invention and the temperature of the pin 24 of the base 12 of the conventional halogen lamp were measured while the lamp was turned on at a voltage of 100 V. As a result, the pin 24 of the base 12 of the conventional halogen lamp was about 270 ° C. in the downward direction and about 420 ° C. in the upward direction. Power supply terminal 13
Was about 80 ° C. in the downward direction and about 130 ° C. in the upward direction.

After this measurement, a life test was carried out on the halogen lamp of the embodiment of the present invention and the conventional halogen lamp of five lamps each under the same posture and the same lighting voltage as the measurement conditions. As a result, with the conventional halogen bulb, the pin 24 corrodes 100 hours after the start of the test, and it is difficult to remove the pin from the socket after the end of its life. There is a part that is discolored and has a concave shape as if it is cut out, and the contact of the other socket also has a black discoloration and severe irregularities on the surface,
It was in a state that could not be used again. On the other hand, the halogen lamp according to the embodiment of the present invention is 500 to 600.
Discoloration or corrosion does not occur in the power supply terminals 13 and 14 until the end of the service life of the time, and even if the fuse 16 operates during the service life, the plug 1
No abnormality was found in 5 and no abnormality was found in socket 17.

FIG. 3 shows another embodiment of the present invention. The outer diameter of the opening of the reflecting mirror is 150 mm, the rated voltage is 100 V, and the output is 1.
It is a partially cutaway front view of a 000W halogen bulb.

The basic structure of the halogen lamp shown in FIG. 3 is the same as that of the above-described embodiment except that the structure of the base 12 is different and that the halogen lamp has a reflecting mirror 18.

In FIG. 3, the reflecting mirror 18 has a spheroidal surface made of aluminum. The incandescent lamp is fixed to an incandescent lamp mounting hole 19 provided at the bottom of the reflecting mirror 18 with an inorganic adhesive 20, and the incandescent lamp mounting hole 19 is provided inside a reflecting mirror mounting hole 21 provided in the base 12. It is fixed with an adhesive 22. In this case, a part of the incandescent lamp is fixed to the incandescent lamp mounting hole 19 so that the filament 7 is located in the focal range of the reflecting mirror 18. The length from the end of the base 12 to the end of the plug 15 is 17 cm.

An incandescent lamp with a reflector having such a configuration and a halogen lamp of the embodiment of the present invention having the conventional structure shown in FIG.
5 is mounted on a commercially available lighting fixture, and the base 12 is supported upward, and in the case of the embodiment of the present invention, the plug 15 is inserted into a socket (not shown) located further above the base 12 in the vertical direction. It was configured as follows. With the lamp turned on at a voltage of 100 V, the temperature of the power supply terminal 13 of the plug 15 of the incandescent lamp with the reflecting mirror of the embodiment of the present invention and the temperature of the pin 24 of the base 12 of the conventional halogen lamp were measured. As a result, the plug 1 of the incandescent lamp with the reflecting mirror according to the embodiment of the present invention is obtained.
5, the temperature of the power supply terminal 13 did not exceed 150.degree.
It was above 0 ° C.

After this measurement, a life test was performed on each of the incandescent lamps with reflectors of the embodiment of the present invention and the conventional halogen lamps, each under the same measurement conditions and the same lighting voltage. As a result, in the conventional halogen bulb, the pin 24 corrodes 100 hours after the start of the test, and it is difficult to remove the pin 24 from the socket after the end of its life. There are parts that are discolored and are concave as if they were excavated,
The contact of the other socket was also in such a state that black discoloration and unevenness of the surface were so severe that it could not be used again. On the other hand, the incandescent lamp with the reflecting mirror according to the embodiment of the present invention has 50
Discoloration or corrosion does not occur in the power supply terminal 13 until the end of the life of 0 to 600 hours.
No abnormality was found in No. 5, and no abnormality was found in the socket.

[0021]

As described above, according to the present invention,
When an incandescent light bulb is installed in a lighting fixture, the plug with the power supply terminal is inserted into the socket at a distance from the incandescent light bulb, which forms the majority of the heat source. It is possible to prevent corrosion and seizure of the power supply terminal of the plug and the contact of the socket, and to reduce the temperature change near the fuse due to the lighting posture. It is possible to provide an incandescent lamp having an excellent effect that the plug is not damaged even when the arc is blown.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an incandescent lamp according to an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of a plug of the incandescent lamp.

FIG. 3 is a partially cutaway front view of an incandescent lamp according to another embodiment of the present invention.

FIG. 4 is a schematic view showing a lighting fixture to which an incandescent light bulb according to an embodiment of the present invention is attached.

FIG. 5 is a partially cutaway front view of a conventional halogen bulb.

FIG. 6 is a schematic view showing a lighting fixture to which a conventional halogen bulb is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass bulb 2 Sealing part 3, 4 Metal foil 5, 6 Inner lead wire 7 Filament 8, 9 Outer lead wire 10, 11 Power supply line 12 Base 15 Plug 16 Fuse 17 Socket 18 Reflector

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01K 1/66 H01K 1/42 H01K 7/00

Claims (2)

(57) [Claims] A translucent container having a sealing portion at at least one end, a metal foil embedded in the sealing portion, and an internal lead wire extending from the metal foil into the translucent container;
A filament provided between the inner leads, an outer lead led out of the sealing portion from the metal foil,
A base covering the end of the sealing portion, a power supply line extending from the external lead wire and derived from the base, a fuse connected to at least one of the power supply lines, and the fuse inside. An incandescent light bulb , comprising: a plug disposed and connected to the power supply line , wherein the base and the plug are separated from each other . 2. A light-transmitting container having a sealing portion at least at one end, a metal foil embedded in the sealing portion, and an internal lead wire extending from the metal foil to the inside of the light-transmitting container;
A filament provided between the inner leads, an outer lead led out of the sealing portion from the metal foil,
A base covering the end of the sealing portion, a power supply line extending from the external lead wire and derived from the base, a fuse connected to at least one of the power supply lines, and the fuse inside. And a plug connected to the power supply line, and the base and the plug
And a reflector having an incandescent lamp mounting hole on the back side, and a part of the incandescent lamp is mounted on the incandescent lamp mounting hole such that the filament is located in the focal range of the reflecting mirror. An incandescent light bulb with a reflecting mirror, which is fixed to the light bulb.