JP2650075B2 - Fluorescent lamp manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus for evacuating a fluorescent lamp and filling a rare gas, and more particularly to a manufacturing apparatus suitable for manufacturing a hot cathode fluorescent lamp.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing a main part of a conventional manufacturing apparatus for exhausting a fluorescent lamp and filling a rare gas. In the same figure, reference numeral 21 denotes a fluorescent lamp sealing member, in which electrodes 22 are housed inside both ends, and electrode lead wires 23 thereof extend to the outside. 24 is a power supply for energizing and heating the electrode 23, 25 is an exhaust pipe protruding from the tip of the sealing body 21, and 26 is this exhaust pipe 2
5 is a double-structured exhaust head into which a rubber mouth 27 is provided and an exhaust hole 28 for exhaust is provided.

When exhausting a fluorescent lamp, first, an exhaust pipe 25 communicating with a sealing body 21 is inserted into an insertion port of an exhaust head 26 as shown in FIG. Then, after the air is exhausted from the exhaust hole 28 as shown by the arrow in the figure, a rare gas is sealed, and the exhaust pipe 25 is cut and sealed.

When the sealing member 21 is evacuated, the tungsten filament electrode 22 is energized and heated to convert a carbonate emission material such as Ba, Sr, Ca or the like applied on the electrode 22 into an oxide. . Thus, a hot cathode electrode is formed.

[0005]

In the conventional fluorescent lamp manufacturing apparatus as described above, an exhaust pipe is used for an electric heating step. As shown in FIG. Dimension D remains, and it is difficult to form a stem structure without an exhaust pipe like a cold-cathode fluorescent lamp. Therefore, there is a problem that a non-light emitting portion of the fluorescent lamp becomes large. Since it is difficult to provide an exhaust pipe with a lamp, there has been a problem that a hot cathode fluorescent lamp with a small diameter cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a non-light emitting portion of a fluorescent lamp is reduced, and a fluorescent lamp manufacturing apparatus capable of easily obtaining a small-diameter hot cathode fluorescent lamp. It is intended to provide.

[0007]

An apparatus for manufacturing a fluorescent lamp according to the present invention is an apparatus for manufacturing a fluorescent lamp for exhausting an envelope accommodating the electrodes of the fluorescent lamp, wherein the end of the envelope is inserted. An exhaust head having an inlet and an exhaust hole for exhaust and having an elastic member disposed around the inlet is provided, and extends from the end of the seal inside the elastic member to the outside of the seal. A current-carrying terminal for contacting the electrode lead wire is provided, and the above-mentioned elastic member is expanded inward by compressing the gas exhaust head to make the space between the gas-tight body and the gas-tight body. The terminal is energized from the terminal to the electrode in the enclosure to oxidize the emission material on the electrode.

Further, the elastic member is provided in the longitudinal direction of the sealing body in a double manner , and one of the elastic members is provided with a current-carrying terminal. It was raised.

[0009]

According to the fluorescent lamp manufacturing apparatus of the present invention,
When the end of the sealing body is inserted into the insertion port of the exhaust head, and the exhaust head is compressed, the internal elastic member expands and the space between the sealing body and the sealing member becomes airtight. In this state, the inside of the sealed body is exhausted from the exhaust hole, and at the same time, the electrodes in the sealed body are energized through the electrode lead wires from the conductive terminals provided inside the elastic member, and the emission material on the electrodes becomes oxide.

[0010]

FIG. 1 is a sectional view showing a main part of an embodiment of the present invention. In the figure, reference numeral 1 denotes a sealing body in which electrodes 2 of a tungsten filament of a fluorescent lamp are housed at both ends, and an electrode lead wire 3 connected to the electrode 2 extends outside the sealing body 1 through a bead stem 4. Is formed in the vicinity of.

Reference numeral 6 denotes an exhaust head having an insertion port 7 into which the end of the envelope 1 is inserted and an exhaust hole 8 for exhaust. The exhaust head 6 has a double structure of heads 6a and 6b, and It is configured to be compressible in the direction. Reference numerals 9a and 9b denote elastic rubbers provided around the insertion port 7 inside the exhaust head 6, and have a double structure in the longitudinal direction of the envelope 1. A current-carrying terminal 10 is provided inside one rubber cuff 9a to be in contact with the electrode lead wire 3. The hardness of the rubber cuff 9a provided with the current-carrying terminal 10 is higher than the hardness of the other rubber cuff 9b. I have. Reference numeral 11 denotes a vacuum introduction terminal connected to the energization terminal 10.

Next, the operation of exhausting the fluorescent lamp and filling the rare gas in the apparatus configured as described above will be described. First, as shown in FIG. 2A, the electrode lead wire 3 from the electrode 2 in the envelope 1 is bent outward along the envelope 1. Then, the sealing body 1 is inserted into the insertion port 7 of the exhaust head 6, and the head 6a and the head 6b are compressed vertically. As a result, the rubber mouth 9b inside the exhaust head 6 is crushed in the vertical direction and expands in the horizontal direction, and the space between the rubber and the sealing body 1 is airtight.

Next, the sealing body 1 is exhausted from the exhaust hole 8 with the sealing body 1 airtight. At this time, as shown in FIG. 2 (b), the rubber mouth 9a has a conductive terminal 10 made of metal or the like provided inside, and expands in the lateral direction similarly to the rubber mouth 9b to press the conductive terminal 10 to form an electrode. Lead wire 3 and conducting terminal 10
Are in a conductive state. Then, during this evacuation step, a power source is connected to the vacuum introduction terminal 11, and a voltage is applied to the electrode 2 in the envelope 1 via the energization terminal 10 and the electrode lead wire 3.
Thereby, Ba, Sr, Ca applied to the electrode 2
And the like, and the carbonate emission material can be baked to form an oxide.

The CO ₂ gas and the like generated by the reaction of the emission material on the electrode 2 during the firing are simultaneously exhausted from between the bead stem 4 and the sealing body 1. Then, when the evacuation is completed, a rare gas such as Hg, Ar or the like is sealed in the sealing body 1 and sealed off by a gas burner or the like in the recess 5 near the bead stem 4. Thus, a fluorescent lamp having a stem structure without an exhaust pipe as shown in FIG. 2C is obtained.

As described above, the emission material can be heat-treated in a vacuum, and the exhaust pipe and the like do not remain after the sealing is cut off.
The following small diameter hot cathode fluorescent lamps can also be easily obtained.

In the above embodiment, the rubber caps 9a and 9b are provided in a double manner. This is because the hardness of the rubber cap 9a provided with one energizing terminal 10 is made higher than that of the other rubber cap 9b.
The mouth rubber 9b, which is not provided with the energizing terminal 10, expands greatly in the lateral direction, and a gap is generated due to contact with the lead wire 3.
It is possible to increase the vacuum-tight closing of the envelope 1 as compared to the easy elastic welt 9a.

[0017]

As described above, according to the present invention, the exhaust having the insertion port into which the end of the sealing body is inserted and the exhaust port for exhaust, and the elastic member disposed around the insertion port. A head is provided, and an energization terminal is provided inside the elastic member, which is in contact with an electrode lead wire extending from the end of the envelope to the outside of the envelope, and the elastic member is inwardly compressed by compressing the exhaust head. In a state in which the space between the sealing member and the sealing member is expanded, the sealing member is evacuated from the exhaust hole, and at the same time, a current is applied to the electrode in the sealing member through the current-carrying terminal to oxidize the emission material on the electrode. The non-light emitting part of the lamp becomes smaller,
Also, there is an effect that a small-diameter hot cathode fluorescent lamp can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an operation of the embodiment.

FIG. 3 is a sectional view showing a main part of a conventional example.

FIG. 4 is an explanatory diagram showing an operation of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Enclosure 2 Electrode 3 Electrode lead wire 6 Exhaust head 7 Insertion port 8 Exhaust hole 9a, 9b Rubber (elastic member) 10 Conducting terminal

Claims (2)

(57) [Claims] An apparatus for manufacturing a fluorescent lamp for exhausting an envelope containing an electrode of a fluorescent lamp, comprising an insertion hole into which an end of the envelope is inserted, and an exhaust hole for exhaustion. An exhaust head having an elastic member disposed around the mouth, and a current-carrying terminal provided on the inner side of the elastic member for contacting an electrode lead wire extending from an end of the seal to the outside of the seal; In a state where the elastic member is expanded inward by compressing the inside and the space between the sealing member and the sealing member is airtight, the sealing member is evacuated from the exhaust hole, and at the same time, a current is supplied to the electrode in the sealing member from a current-carrying terminal to cover the electrode. An apparatus for manufacturing a fluorescent lamp, wherein the emission material is an oxide. 2. The elastic member is provided double in the longitudinal direction of the envelope.
2. The fluorescent lamp manufacturing apparatus according to claim 1, wherein the energizing terminal is provided only on one of the elastic members, and the hardness of the elastic member provided with the energizing terminal is higher than the hardness of the other elastic member.