JPS62145643A - Manufacture of lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a light bulb having a foil seal structure.

[Background of the invention]

Light bulbs are usually widely used as light sources or heat sources, and the inside of the bulb is filled with various gases depending on the purpose.For example, incandescent bulbs are equipped with filament coils, In a discharge lamp, electrodes are arranged. Conventionally, various seal structures have been used to conduct electricity to filament coils or electrodes, but the foil sole structure using metal foil made of molybdenum etc. has high airtightness and can carry large currents. It has been widely adopted due to its

[Conventional technology]

Conventionally, single-end type halogen incandescent light bulbs employing a foil seal structure have been manufactured, for example, in the following manner. That is, as shown in FIG. 4, one internal lead 14 and the other internal lead 15 are connected to one end I2 and the other end 13 of the filament coil 11, respectively, and metal foils are connected to these internal leads 14 and 15, respectively. lG, 17, and these metal foils 16.
External IJ-tooths 1B and 19 are connected to the other ends of 17, respectively, to form the light emitting section assembly 1. 20 is a supporter,
21 is a fixing glass member for fixing the relative positions of the internal leads 14, 15 and the supporter 20.

This light emitting part assembly 1 is assembled by inserting the external leads 18 and 19 into the holding holes 31 of the holder 3, and
is located at the bottom and the internal leads 14 and 15 are located at the top and held by the holder 3 so as to stand upright. The glass envelope tube 4 having the opening 42 is lowered with the opening 42 facing downward, and the filament coil 1 is removed.
1 and one internal lead 14 is located in the exhaust pipe 41 of the glass tube 4, and the metal foil 1
6.17 is positioned within the sealing tube section 43.

In this state, while flowing a protective gas such as nitrogen or argon into the inside of the glass tube 4 from the exhaust pipe 41, the sealing tube section 43 of the glass tube 4 is heated from the outside using a gas burner. After heating for one day, press the glass of the tube part 43 for the sealing part with a pincher or the like to remove the metal foil 1.
G, 17 is hermetically buried in the glass of the tube section 43 for sealing section to form a sealing section.

After forming the sealing portion in this way, the inside of the glass tube 4 is evacuated through the exhaust pipe 41, and the necessary sealed gas is introduced into the inside of the glass tube 4 through the exhaust pipe 41. Thereafter, the exhaust pipe 41 is heated and melted to form a light bulb in a cold airtight manner.

[Problem that the invention seeks to solve]

However, in the manufacturing process of such light bulbs,
In order to arrange the filament coil 11 in the proper position within the glass envelope tube 4, it is necessary to stably hold the light emitting section assembly 1 in an upright state with the holder 3. As the foils 16 and 17, molybdenum foils having a planar rectangular shape and having a thickness of, for example, 23 to 30 p* are used in order to obtain sufficient airtightness. When held upright, the metal foil 16.17 tends to bend due to the weight of the filament coil 11, internal lead 14.15, fixing glass member 21, etc., and as a result, the light emitting section assembly l may tilt or fall. Therefore, it is difficult to stably stand the light emitting unit assembly 1 upright in the glass tube 4 in an appropriate posture, and as a result, it is difficult to carry out this process smoothly by automated mechanical means. There are problems with low yield and low productivity.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to manufacture a light bulb with a foil seal structure in which the light emitting part assembly can be stably erected on a holder and with a high yield. The purpose of the present invention is to provide a method for manufacturing a light bulb that can be used to produce a light bulb.

[Means for solving problems]

The method of manufacturing a light bulb of the present invention is a method of manufacturing a light bulb with a whistle seal structure, in which an internal lead for power supply is connected to one end of a metal foil, and an external lead is connected to the other end of the metal foil to emit light. a step of forming a light-emitting part assembly, holding the light-emitting part assembly on a holder by an external lead so that the light-emitting part assembly is in an upright position with the inner lead positioned upward; The glass envelope tube is lowered from above the component assembly relative to the light emitting section assembly so that the light emitting section assembly is positioned within the glass envelope tube, and the glass tube for the envelope is lowered relative to the light emitting section assembly. and heating and melting the metal foil to airtightly embed the metal foil in the glass, and in the light emitting unit configuration assembly held by the holder, the metal foil has a fold line extending from the one end to the other end. It is characterized by being bent along the

[Effect]

According to this method, in the light emitting part assembly held by the holder, the metal foil is bent along the fold line extending from one end to the other end, so that the metal foil is folded along the fold line. The bending strength in the orthogonal direction is large, and therefore, when the light emitting part assembly of the lever is held upright on the holder by its external leads, the metal foil is less likely to bend and the light emitting part is The component assembly can be stably held in an upright position. Therefore, in the subsequent process, the light emitting part assembly can be easily placed in the single body tube in a proper posture, and the process can be carried out smoothly.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail. This embodiment is an example of manufacturing a non-glue end type halogen incandescent light bulb used for general lighting, for example, with a rated voltage of about 120 V and a rated power consumption of about 250 to 500 W.

As shown in Part 1, for example, if the thickness is 25μ, 7m11
It has a thin rectangular plate-like form with an area of ×311Im,
An inner lead 14 made of tungsten or molybdenum is spot-welded to one end of a metal foil 6 made of a molybdenum core material with a platinum cladding, and one molybdenum outer lead 14 is spot-welded to the other end of the metal foil 6. 18, and as shown in FIG.
For example, a fold i extending from the connection part with the internal lead 14 at one end to the connection part with the external lead 18 at the other end.
One of the power supply members 8 is formed by bending it so that, for example, a V-shaped groove 61 is formed along the direction p.

The other inner lead 15 made of tungsten or molybdenum is spot welded to one end of the metal tlAi 7 having the same structure as the metal foil 6, and the other outer lead 19 made of molybdenum is spot welded to the other end of this metal foil 7. Then, like the metal foil 6, this metal foil 7 is shaped, for example, in a V-shape along a fold line extending from the connection part with the internal lead 15 at one end to the connection part with the external lead 19 at the other end. 71 to form the other power supply member 9.
form.

The bending angle α (see FIG. 2) of these metal foils 6 and 7 is preferably 90° or 90' or more, for example.

When this bending angle is excessive, the gold Fi M 6
.

The strength against bending of the light emitting part assembly 7 is so small that it may not be possible to stably hold the light emitting part assembly in an upright position on the holder in a later step. On the other hand, if the bending angle is too small, it will be difficult to embed the metal foils 6 and 7 in a flat position in the glass of the hermetic sealing part in the process of forming the hermetic sealing part later, resulting in a high airtightness. You may not be able to get it.

Next, both of these power supply members 8 and 9 are connected to the internal lead 1.
At step 4.15, it is fixed to the fixing glass member 21. At this time, the supporter 20 also holds the fixing glass member 21 at the same time.
Fixed to. Then, the tip of one internal lead 14 is inserted into the coiled end 12 of the filament coil 11 made of tungsten, and these are spot welded, and the tip of the other internal lead 15 is inserted into the coiled end 12 of the filament coil It. The M filament coil 11 is stretched by inserting it into the other end 13 of the single coil shape and bringing them into contact (for example, spot) 8, thereby forming the light emitting section assembly I.
Form O.

The external lead 18゜1 of this light emitting section assembly 10
9 into the holding hole 31 of the holder 3, and hold the light emitting part assembly 10 so that the outer leads 8, 19 are positioned downward and the inner leads 14, 15 are positioned upward, so that it stands upright;
It is held by the t'F tool 3. Here, the inner diameter of the holding hole 31.degree. 31 is set to a size that matches, for example, the outer diameter of the inner lead 14, 15 so that the light emitting section assembly 10 does not swing when it is stood upright.

In this state, from above the light emitting unit assembly IO,
For example, a glass sealing tube 4 made of quartz glass having an exhaust pipe 41 at one end and an opening 42 at the other end is lowered with the opening 42 facing downward, and one end 12 of the filament coil 11 and one Tip 2 of the connection part with the internal lead 14
2 is located in the exhaust pipe 41 of the glass tube 4, and the metal foils 6, 7
is positioned within the opening 1 part 42.

In this state, the tube part 43 for the sealing part of the glass tube 4 is heated and melted using, for example, a gas burner, and the V-shaped grooves 61, 71 of the metal foils 6, 7 are
By pressing in the direction in which the metal foils 6,
In the state where the posture of 7 is corrected and flattened, the tube part 43 for the sealing part is
The tube portion 43 for the sealing portion is hermetically sealed to form an airtight sealing portion 44 (see FIG. 3).

Next, the inside of the glass tube 4 is exhausted through the exhaust pipe 41, and then, for example, high Iz
Introduce a filler gas such as gas or inert gas. After the introduction of the filled gas is completed, the exhaust pipe 4 is compressed to airtightly close the gap to form the chip 45, and as shown in Figure 3, the single-entity halogen white Tano 5 light bulb is completed. get.

According to the above embodiment, the light emitting unit configuration S,
The metal foils 6 and 7 are connected to the inner lead 14 at one end thereof.
and 15 along the fold line extending from the connection with external ports 18 and 19 at the other end.
1 and 71, the metals '1A+6 and 7 have a large bending strength in the direction orthogonal to the direction in which the V-shaped grooves 61 and 71 extend, respectively. When this light-emitting part configuration X and solid body 10 are held in an upright state on the holder 3, IQ distortion of the metal foils 6 and 7 is difficult to occur, and the light-emitting part configuration assembly 10 is stabilized in an upright position. can be held.

Therefore, in the later steps, be careful to position the light emitting part assembly 1 in the glass tube 4 in the proper position.・The coil 11 extends along the tube axis P of the glass tube 1, and the glass 1f, 1 is arranged so that the metal foil 7 is surrounded by the sealing tube section 43 of the glass tube 1. can be placed in the container (+J) by automated means (.k), and as a result it becomes possible to manufacture (;hi) with a high yield.

Then, the protrusions 6 and 7 of the metal 7 are formed into V-shaped rM G l in the process of forming the light emitting part structure 311 force body lO.
+ 71 is formed, but when this metal 2^6.7 is hermetically buried in the glass of the sealing tube 43 of the glass tube 4, the metal 2^6.7 is bent to form the sealing tube 43. By pressing the glass in the direction in which the V-shaped groove 61.71 expands, the metal box 6.7 is buried in a flat posture C: corrected, so that it is sufficiently high in the airtight sealing part 44. Provides airtightness.

Although the present invention has been described above based on one embodiment, various modifications can be made to the present invention. For example, the shape of the metal foil is not limited to a V-shape, but may be a curved shape such as a cylindrical surface.

The type of light bulb to which the present invention can be applied is not particularly limited as long as it has a foil-filled structure, such as a double-end type (both ends sealed) light bulb, ultra-high pressure mercury lamp,
The present invention can also be applied to discharge lamps such as xenon lamps, and in the case of discharge lamps, an electrode body is provided at the tip of the internal lead.

〔Effect of the invention〕

As described above, according to the present invention, in the light emitting part assembly held by the holder, the metal foil is folded along the fold line extending from one end connected to the internal lead to the other end connected to the external lead. Since it is bent, the metal foil has a large bending strength in the direction perpendicular to the fold line.
Therefore, when the light emitting part assembly is held upright on the holder by its external leads, the metal foil is less likely to bend, and the light emitting part assembly is stably held in an upright position. As a result, in the subsequent process, the light-emitting part assembly can be passed through the glass envelope tube and easily positioned in the correct position without causing the metal foil to bend. As a result, it becomes possible to manufacture light bulbs with a high yield.

[Brief explanation of drawings]

Figures 1 to 3 are explanatory diagrams showing one embodiment of the present invention, and Figure 4 is an illustration of a conventional light bulb! ! ! It is an explanatory diagram showing an example of how to send a letter. 1... Light emitting part configuration assembly 11... Filament coils 14, 15... Internal leads 16.17... Metal foils 18, 19... External leads 21... Fixing glass member 3...・Holder 31... Holding hole 4... Glass enclosure tube 41... Exhaust pipe 42...
・Opening part 43...Pipe part 44 for sealing part...
・Airtight sealing part 6, 7...Metal foil 61.71・
・・V-shaped full 8, 9 ・・Power supply member 10 ・・Light-emitting part configuration assembly

Claims (1)

[Claims] 1) A method for manufacturing a light bulb with a foil seal structure, wherein an internal lead for power feeding is connected to one end of the metal foil, an external lead is connected to the other end of the metal foil, and the light emitting part is assembled. a step of forming a three-dimensional object; holding the light emitting part assembly in a holder using an external lead so that the inner lead is positioned upward and in an upright position; and the light emitting part assembly being held in the holder. The glass envelope tube is lowered from above relative to the light emitting section assembly so that the light emitting section assembly is positioned within the glass envelope tube, and the glass envelope tube is heated and melted. and embedding the metal foil in the glass airtightly, and in the light emitting part configuration assembly held by the holder, the metal foil is arranged along a fold line extending from the one end to the other end. A method for manufacturing a light bulb characterized by being bent.