JP2001196031A - Halogen lamp - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a one-end-sealed halogen lamp that does not become unlit due to contact between adjacent coils of a filament when the lamp is lit in a vertical posture. In a glass bulb having a sealing portion formed at one end, a filament having both ends connected to an internal lead rod is disposed in the axial direction of the glass bulb, and glass fused to the internal lead rod. In a halogen lamp of a one-end sealing type in which the middle part of the filament is held at the tip part of the supporter 30 whose base end part is held by the stem 13, the filament is firmly fixed to the tip part of the supporter in a non-rotatable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-end sealed halogen lamp which is lit in a vertical position, and more particularly to a halogen lamp used as a light source of an optical heating device for rapidly heating a semiconductor wafer. is there.

[0002]

2. Description of the Related Art One-end sealed type halogen lamps are widely used as general illumination lamps and light sources for various devices. Recently, for example, they are also used as light sources for light heating devices for rapidly heating semiconductor wafers. ing. In such a light heating apparatus, a plurality of one-end-sealed halogen lamps having a power consumption of about 1.5 kW are arranged in a plane in a vertical posture, and a semiconductor wafer, which is a work arranged below the halogen lamp, includes infrared rays. It is heated by irradiating light to rapidly raise the temperature to a predetermined temperature.

FIG. 8 shows a conventional example of a mount of a one-end sealed type halogen lamp used as a light source of a light heating device. 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. The upper and lower ends of the filament 20 are connected to a pair of internal lead rods 14, 14. It is connected. A glass stem 13, which is a non-conductor, is welded to the inner lead rods 14,.

When the mount is lit in a vertical position, the power consumption is large, so that the temperature of the filament 20 becomes extremely high, and the tungsten wire is softened. Therefore, the filament 20 hangs down by its own weight, and a "sag" phenomenon occurs. As a result, the coil pitch becomes narrower toward the lower side of the filament 20, and the vertically adjacent coils come into contact with each other, causing the filament 20 to be short-circuited and become unlit.

For this reason, the base end 30a of the supporter 30 is fixed to the glass stem 13, and the middle part of the filament 20 is hooked on an annular portion 39 formed at the tip of the supporter 30. Accordingly, the own weight of the filament 20 is
9, the weight of the filament 20 above the annular portion 39 is not transmitted to the filament 20 below. Accordingly, the filament 20 below the annular portion 39
Reduces the amount of sag due to its own weight, and can prevent non-lighting due to contact between vertically adjacent coils.

[0006]

However, the annular portion 39 of the supporter 30 does not hold the filament 20 at its axis but at a position deviated from the axis. The filament 20 is only inserted into the annular portion 39 and is not forcibly fixed by caulking or the like. That is, the filament 20 is rotatably held by the annular portion 39 of the supporter 30.

Therefore, if the temperature of the filament 20 becomes high at the time of lighting, a "sag" phenomenon also occurs below the annular portion 39. However, as described above, the annular portion 39 is located at a position deviated from the axis of the filament 20. Since it is rotatably held, the filament 20 below the annular portion 39 rotates around the annular portion 39 as a fulcrum. And the filament 20
Is held by the internal lead rod 14, so that the filament 20 below the annular portion 39 is deformed into a "U" shape. As a result, the filament 20 in the shape of
There is a case where the vertically adjacent coils come into contact with each other on the inside of the middle abdomen and the filament 20 is short-circuited, resulting in no lighting.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a one-end-sealed halogen lamp in which the adjacent coils of the filament do not come into contact with each other when the lamp is turned on in a vertical position.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a glass bulb having a sealing portion formed at one end, wherein a filament whose both ends are connected to an internal lead rod is made of glass. In a one-end sealed type halogen lamp in which the filament is held at the distal end of a supporter whose base end is held by a glass stem welded to an internal lead rod and which is arranged in the axial direction of the bulb, the filament is supported by the supporter. Securely fix to the tip so that it cannot rotate.

In order to firmly fix the filament to the tip of the supporter non-rotatably, the invention according to claim 2 forms a fixed coil along the axis of the filament in the middle abdomen of the filament. The tip of the supporter is inserted and fixed. According to the invention of claim 3, the filament is divided into a plurality of pieces,
A fixed coil is formed in a direction perpendicular to the axis of the filament, and the tip of the supporter is inserted into and fixed to the two fixed coils. The invention according to claim 4, wherein the filament is further wound with the primary coil. A double coil is formed in the shape of a secondary coil, and a helical ring formed at the tip of the supporter is inserted and fixed in the primary coil of the middle part of the filament along the primary coil.

[0011]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a one-end sealed halogen lamp with a power consumption of 1.5 kW according to a first embodiment. In FIG. 1, a sealing portion 11 is formed at one end of a glass bulb 10 made of quartz glass. The other end has an exhaust pipe remaining portion 12 formed therein. A small amount of halogen gas is sealed in the glass bulb 10 together with the inert gas. A pair of molybdenum foils 15 are embedded in the sealing portion 11, and one ends of the pair of external lead rods 16 are respectively welded to the molybdenum foils 15 and extend to the outside,
One ends of the pair of internal lead rods 14 are also welded to the molybdenum foil 15 and extend into the glass bulb 10. A glass stem 13, which is a non-conductor, is welded to the inner lead rods 14, 14, and a base end 30 a of a supporter 30 made of a molybdenum rod is held by the glass stem 13.

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 along the 0 axis. Therefore, the sealing portion 11
When lighting in a vertical position with the
Although 0 is also in a vertical posture, the upper and lower ends of the filament 20 are connected to a pair of internal lead rods 14,14. The lower end of one of the internal lead rods 14 is inserted and held in the remaining portion 12 of the exhaust pipe so that the filament 20 does not tilt.

A fixed coil 21 is formed in the middle part of the filament 20. The fixed coil 21 is obtained by stretching two portions of the middle abdomen of the filament 20 and placing the double coil between the stretched portions in a vertical posture. FIG. 2 is a cross-sectional view of the mount along the line AA in FIG. 1. As shown in FIG. 2, the fixed coil 21 coincides with the axis of the filament 20. On the other hand, the distal end of the supporter 30 is bent in a crank shape, and as shown in FIG. 2, a vertical distal end portion 31 is inserted into the fixed coil 21 and fixed by caulking or the like. That is, the fixed coil 2
The filament 20 below 1 is firmly fixed by a supporter 30 so as not to rotate.

If the filament 20 is long, that is, if the self-weight of the filament 20 is large, fixing the fixed coil 21 at one location with the supporter 30 will cause the self-weight of the upper and lower filaments 20 to the fixed coil 21. Are not sufficiently small, and may become unlit due to the “sag” phenomenon. Therefore, it is preferable to form the fixed coils 21 at a plurality of locations of the filament 20 and provide the same number of supporters 30 and fix them in the same manner. .

When the external lead rod 16 is energized, the filament 20 emits light and lights up. At this time, the filament 20 becomes extremely hot due to the large power consumption. However, since the fixed coil 21 is firmly fixed by the supporter 30 so as not to be able to rotate, the filament 20 below the fixed coil 21 is in a “K” state. It does not deform in the shape of a letter but hangs vertically. However, the self-weight of the filament 20 above the fixed coil 21 is not transmitted to the filament 20 below, so that the amount of sag is small. it can.

FIG. 3 shows a mount of the one-end sealed type halogen lamp of the second embodiment. The structure other than the mount is the same as that of FIG. In FIG. 3, the upper and lower ends of the filament 20 of the double coil are connected to a pair of internal leads 14, and the glass stem 13 welded to the internal leads 14 holds the base end 30 a of the supporter 30. 1, but the filament 20 is divided into two as shown in FIG. The fixed coils 21 are formed at the ends of the filaments 20 facing each other. The fixed coil 21 is one in which the end of the filament 20 is stretched and the double coil is oriented in the horizontal direction.

On the other hand, the tip of the supporter 30 is bent at a right angle, and the tip 31 in the horizontal direction is inserted into the two fixed coils 21 and fixed by caulking or the like. That is,
Also in this embodiment, the filament 20 below the fixed coil 21 is firmly fixed by the supporter 30 so as not to rotate. Therefore, at the time of lighting, the filament 20 below the fixed coil 21 does not deform into a “<” shape, and the vertically adjacent coils are not in contact with each other and the filament 20 is not short-circuited. .

FIG. 5 shows a mount of a one-end sealed type halogen lamp according to the third embodiment. A fixed coil 21 and the like are formed on a filament 20 in which a primary coil is wound into a secondary coil to form a double coil. This is the same as the conventional example shown in FIG. On the other hand, as shown in FIG. 6, the supporter 30 has a spiral ring portion 32 formed at its tip. Then, as shown in FIG. 7, the spiral ring portion 32 is inserted along the primary coil of the middle part of the filament 20 and fixed by caulking or the like. That is,
Also in this embodiment, the spiral ring 32 of the supporter 30 is used.
The filament 20 below the portion fixed by the supporter 30 is firmly fixed by the supporter 30 so as not to rotate. Therefore, at the time of lighting, the filament 20 below the portion fixed by the spiral ring 32 is not deformed in the shape of a “<”, and the vertically adjacent coils are not in contact with each other and the filament 20 is not short-circuited. Unlit can be prevented.

[0019]

As described above, according to the present invention, in a glass bulb having a sealing portion formed at one end, a filament whose both ends are connected to an internal lead rod is arranged in the axial direction of the glass bulb. In a one-end sealed halogen lamp in which the middle part of the filament is held at the tip of the supporter whose base end is held by the glass stem welded to the lead rod, the filament is firmly fixed to the tip of the supporter in a non-rotatable manner. As it is fixed, when lit in a vertical position, the filament below the part fixed by the supporter
It does not deform in the shape of a letter, and the coils adjacent to the filament do not come into contact with each other and do not turn off.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the mount along the line AA in FIG. 1;

FIG. 3 is a front view of a mount according to a second embodiment of the present invention.

FIG. 4 is an explanatory view of a filament in a second embodiment of the present invention.

FIG. 5 is a front view of a mount according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of a supporter according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view of FIG. 5A part.

FIG. 8 is a front view of a conventional mount.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Glass bulb 11 Sealing part 12 Exhaust pipe remainder 13 Glass stem 14 Internal lead rod 15 Molybdenum foil 20 Filament 21 Fixed coil 30 Supporter 30a Supporter base end 31 Supporter tip 32 Spiral ring part 39 Ring part

Claims (4)

[Claims] 1. A glass stem having a sealing portion formed at one end and a filament connected at both ends to an internal lead rod arranged in the axial direction of the glass bulb and welded to the internal lead rod. A halogen lamp in which a middle part of the filament is held at a distal end of a supporter whose base end is held, wherein the filament is non-rotatably fixed to a distal end of the supporter. 2. The fixing coil according to claim 1, wherein a fixed coil is formed in a middle part of the filament along an axis of the filament, and a tip of a supporter is inserted and fixed to the fixed coil. Halogen lamp. 3. The filament is divided into a plurality of filaments,
At the ends of the split filaments facing each other, fixed coils are formed in directions perpendicular to the axis of the filament, respectively.
2. The halogen lamp according to claim 1, wherein the tip of the supporter is inserted into and fixed to the two fixed coils. 4. The filament comprises a double coil in which a primary coil is further wound to form a secondary coil, and a helical ring formed at a tip of a supporter in a primary coil of a middle part of the filament. 2. The halogen lamp according to claim 1, wherein the portion is inserted and fixed along the primary coil.