JP2002367569A - Incandescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an incandescent lamp surely preventing the sagging of a filament, making the temperature of the whole filament uniform, making a halogen cycle good, and preventing the abnormal thinning of the filament. SOLUTION: The filament of this incandescent lamp is divided into a first filament part and a second filament part, each one end positioned on the opposite sides of the first filament part and the second filament part is connected to an inner lead rod embedded in a sealing part, the other end facing each other is connected to each inner lead wire, at least one of the inner lead wires is embedded in the sealing part for fixing, and both inner lead wires are connected each other inside a bulb.

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 as a light source of an optical heating device for rapidly heating a semiconductor wafer or the like.

[0002]

2. Description of the Related Art Incandescent lamps of a one-end sealing type are widely used as lamps for general lighting and various devices. Recently, for example, they are also used as light sources for light heating devices for rapidly heating semiconductor wafers. ing. Such a light heating device arranges a plurality of one-end sealed incandescent lamps having a power consumption of about 1.5 kW in a vertical posture in a plane, and applies infrared rays to a semiconductor wafer which is a work disposed below the incandescent lamp. It is heated by irradiating the light containing the light and rapidly raising the temperature to a predetermined temperature.

FIG. 2 shows a conventional example of an incandescent lamp sealed at one end used as a light source of a light heating device. Filament 2
Numeral 0 denotes a double coil formed by winding a tungsten wire around a primary coil and further winding the primary coil to form a secondary coil. Both ends of the filament 20 are connected to a pair of internal lead rods 15, 15. I have. The ends of the internal lead bars 15 are connected to a molybdenum foil 13 embedded in the sealing portion 11. That is, the internal lead rod 1
One end of 5 is fixed to the sealing portion 11.

When such an incandescent lamp is turned on in a vertical position, the power consumption is large, so that the temperature of the filament 20 becomes extremely high, and the filament 20 hangs down by its own weight, causing a "sag" phenomenon.

For this reason, the base end 30a of the supporter 30 is fixed to the sealing portion 11, and the middle part of the filament 20 is hooked on the annular portion 31 formed at the front end of the supporter 30. Therefore, the self-weight of the filament 20 is divided by the annular portion 31, thereby preventing the filament 20 from drooping due to its own weight.

[0006]

However, even if the filament 20 is supported by the annular portion 31 of the supporter 30, if the temperature of the filament 20 becomes high during lighting, the filament 20 slightly hangs down, and the filament 20 As shown in FIG. 3 which is an enlarged view of the portion, the coils on both sides of the portion supported by the annular portion 31 of the filament 20 are short-circuited via the annular portion 31.

As a result, in the portion where the coil is short-circuited, the resistance becomes smaller than the original resistance value, and an excessive current flows,
The coils on both sides of the portion supported by the annular portion 31 are deformed, and the hanging of the filament 20 is promoted.

In the portion of the filament 20 supported by the annular portion 31, the heat generated in the filament 20 is taken by the supporter 30 through the annular portion 31.
The temperature in this part is low, that is, the filament 20
There has been a problem that the overall temperature uniformity is deteriorated, the halogen cycle is not performed well, a part of the filament 20 becomes abnormally thin, and is broken within the rated time.

[0009] Therefore, the present invention, even when vertically lit,
An object of the present invention is to provide an incandescent lamp which can reliably prevent the filament from sagging, and has a uniform temperature throughout the filament, a good halogen cycle, and no abnormal thinning of the filament.

[0010]

In order to solve the above-mentioned problems, an incandescent lamp according to claim 1 is provided in a bulb having a sealing portion at one end and a remaining exhaust pipe at the other end. In an incandescent lamp in which a filament is arranged in a direction perpendicular to a tube axis, the filament is divided into a first filament portion and a second filament portion in a longitudinal direction, and the first filament portion and the second filament portion are separated from each other. Each one end located on the opposite side is connected to an internal lead bar embedded and fixed in the sealing portion, and the other end of the first filament portion and the second filament portion facing each other are Each of the internal leads is connected to an internal lead, and at least one of the internal leads is embedded and fixed in the sealing portion, and both internal leads are connected in the bulb. It is characterized in.

[0011]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows that the power consumption is 1.
5 shows a 5 kW one-end sealed incandescent lamp. In the figure, a sealing portion 11 is formed at one end of a glass bulb 10 made of quartz glass, and an exhaust pipe remaining portion 12 is formed at the other end. A small amount of halogen gas is sealed in the glass bulb 10 together with the inert gas. A pair of molybdenum foils 13 are embedded in the sealing portion 11, and one ends of the pair of external lead rods 14 are welded to the molybdenum foil 13, respectively, and extend to the outside.
5 are also welded to the molybdenum foil 13 and extend into the glass bulb 10. That is, one end of the internal lead bar 15 is fixed to the sealing portion 11.

The filament 20 is a double coil formed by winding a tungsten wire around a primary coil and further winding the primary coil to form a secondary coil.
It is arranged in a direction orthogonal to the axis 0. Further, the filament 20 is divided into two in a longitudinal direction into a first filament portion 2a and a second filament portion 2b,
Both ends of the filament 20, that is, respective ends located on the opposite sides of the first filament portion 2 a and the first filament portion 2 b are connected to the internal lead rod 15.
The internal lead wire 16 is connected to both ends of the first filament portion 2a and the second filament portion 2b that face each other. The end portion of the internal lead wire 16 connected to the second filament portion 2b is wound in a coil shape to form a coil portion, and the internal lead wire 16 connected to the first filament portion 2a is formed inside the coil portion. And the end is buried and fixed in the sealing portion 11. Furthermore, the second
By caulking the coil portion of the internal lead wire 16 connected to the filament portion 2b, the internal lead wire 1 connected to the first filament portion 2a located therein is caulked.
6 and is fixed.

As described above, since the two internal lead wires 16 are connected, the first filament portion 2a and the second filament portion 2b are electrically connected, and the first filament portion 2a is connected to the first filament portion 2a. The second filament portion 2b is supported by the one internal lead rod 15 and the other internal lead wire 16 and the second filament portion 2b is supported by the other internal lead rod 15 and the other internal lead wire 16.
0 is divided into two parts, and the respective filament parts 2a, 2
Since b is supported individually and independently, the own weight of each filament part 2a, 2b can be made small enough.

As a result, each filament portion 2
Since the own weights of the filaments 2a and 2b can be reduced, the drooping of the respective filament portions 2a and 2b can be reliably prevented, that is, the drooping of the entire filament 20 can be surely prevented, and furthermore, the middle portions of the respective filament portions 2a and 2b Need not be supported by supporters,
The phenomenon of the short circuit between the coils constituting the filament 20 caused by the annular portion of the supporter, which has been a problem in the related art, does not occur, and the sag due to the short circuit between the coils does not occur.

Further, since the first filament part 2a and the second filament part 2b do not support the middle part by the supporter as in the prior art, the temperatures of the respective filament parts 2a and 2b become uniform, and the halogen content is reduced. The cycle is carried out well, and abnormal thinning of the filament does not occur. In other words, since the temperature of the entire filament 20 is uniform, the halogen cycle in the glass bulb 10 does not fail, and the filament is not partially thinned or broken. In this embodiment, the internal lead wires 16 have a constant outer diameter such that light is not emitted and blown at each connection portion.

[0016]

As described above, according to the present invention, a filament is disposed in a valve having a sealing portion at one end and a remaining exhaust pipe at the other end in a direction perpendicular to the tube axis of the valve. In the incandescent lamp, the filament is divided into a first filament portion and a second filament portion in the longitudinal direction, and each filament portion is individually and independently supported by the internal lead rod and the internal lead wire. The weight of the filament part can be reduced,
It is possible to reliably prevent the filament from sagging.

In addition, since the temperature of each filament portion can be made uniform, that is, the temperature of the entire filament can be made uniform, a halogen cycle failure in the bulb does not occur, and the filament is partially thinned abnormally and disconnected. Never do.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an incandescent lamp of the present invention.

FIG. 2 is an explanatory diagram of a conventional incandescent lamp.

FIG. 3 is a partially enlarged explanatory view of a supporter and a filament of a conventional incandescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Valve 11 Sealing part 12 Exhaust pipe remaining part 13 Molybdenum foil 14 External lead rod 15 Internal lead rod 16 Internal lead wire 20 Filament 2a First filament part 2b Second filament part

Claims (1)

[Claims] 1. An incandescent lamp in which a filament is disposed in a bulb having a sealing portion at one end and a remaining exhaust pipe at the other end in a direction perpendicular to a tube axis of the bulb, wherein the filament is disposed in a longitudinal direction. , The first filament part and the second filament part are divided into two, and one end located on the opposite side of the first filament part and the second filament part is embedded and fixed in the sealing part. The other end portions of the first filament portion and the second filament portion facing each other are connected to an internal lead wire, and at least one of the internal lead wires is a sealing portion. An incandescent lamp, wherein the lamp is embedded and fixed in the lamp and both internal lead wires are connected in the bulb.