JP2593588B2 - Halogen lamp sealed on one side - Google Patents

Abstract

A halogen incandescent lamp (1), having a single pinch, with luminaire body arms (8) bent in a U-shape, for protection against the two lighting arms (8) of the luminaire body (6) striking together, has at least one glass tube (24) which extends at right angles to the plane of the luminaire body (6) and is formed from the material of the bulb (2). <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a halogen lamp sealed on one side according to the preamble of claim 1.

[0002]

2. Description of the Related Art A halogen lamp of this type is disclosed in EP-OS17.
39995.

If the lamp is designed to be used directly with the grid voltage, the illuminants used in the lamp must have a relatively high resistance and therefore be long. Must. For this reason, the luminous body is bent into two luminous arms and has a shape similar to a V or U shape as a whole. However, this promising concept in itself also has two significant drawbacks. One is that the lamp is very sensitive to vibration. When an impact load is applied to the lamp being lit, the two arms of the illuminator come into contact, and at that time the coil part that is still energized may burn due to overload. This is due to the fact that the entire voltage of the feed network is applied to one part (generally about half) of the filament length.

Another disadvantage is that, in a horizontal lighting position, the arm of the illuminator may come into contact with the inner wall of the bulb in some circumstances. This is because the free length of the arm is extremely long, and a certain amount of coil slack (about 10%) cannot be avoided. As a result, the glass eventually becomes black and devitrifies, and the life of the bulb is shortened.

[0005] On the other hand, DE-GM1952467 describes:
A halogen lamp suitable for photography is disclosed. The lamp has a U-shaped bent holding frame for the illuminator, the holding frame consisting of a glass rod or glass tube passing through the lamp axis, the rod or tube being remote from the pinch. The end has one or more hooks that hold the illuminant. The illuminant itself is short, as will be appreciated by those skilled in the art, so that there is no danger of the coil arms colliding. A glass tube or glass rod is introduced prior to sealing the bulb, partially embedded in the pinch base and positioned inside the pinch to connect to the respective power supply. At first glance, such an arrangement appears to be suitable for a halogen lamp used at the grid voltage, in order to avoid collision of both coil arms. However, the requirements for general lighting halogen lamps used at the grid voltage are different from the requirements for photographic lamps.
This is especially true for lifetime and power consumption. In the case of photographic lamps, the stability of the coil is improved due to the generally larger coil filament diameter.

As a result of a long series of experiments, in the case of the halogen lamp according to the invention, glass tubes or glass rods as described above are devitrified during the desired long life (about 2000 hours) due to high temperature loading. However, it may darken, which may indirectly result in early lamp failure. For a photographic lamp with a life of about 50 hours, this effect is of little consequence.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to make it particularly simple and inexpensive to manufacture, resistant to vibrations,
An object of the present invention is to provide a long-life halogen lamp.

[0008]

SUMMARY OF THE INVENTION In accordance with the present invention, at least one web formed from the material of the bulb prevents the light emitting arms of the light emitter from contacting each other. Has become. In this case, the expression “web” means a narrow or narrow projection, ie a narrow bridge or abdomen, projecting inward from the wall of the valve. A particularly advantageous configuration of the invention is described below.

[0009] Surprisingly, the following has been found. That is, unlike the prior art, glass webs formed from the bulb material have significantly improved temperature resistance. The reason for this is that additional cooling is performed from the outside, so that breakage of the glass web is prevented.

This web, in its simplest form, functions as a pure separation means. For example, it is configured as a partition passing through the lamp axis. In that case, however, the cooling effect is not very high, since the partitions are very thick.

The web may also be tubular and extend perpendicular to the lamp axis. By doing so, the cooling effect is enhanced. This is because the heat radiation area is larger than the heat radiation coil portion.

These two embodiments are particularly advantageous if horizontal assembly is avoided when the illuminator plane is vertical, or the luminous arm is relatively short (for example 10 mm), or the coil of the arm is itself stable. As far as is feasible (eg in the case of a 110 V feed network).

In a horizontal lighting position, even in the case of a 220 V power supply network or an extremely long light emitting arm (about 15 mm), an ideal use characteristic is that a plurality of horizontal tubular webs are used. On the basis of the fixed holding of the individual light-emitting arms.

The problem of darkening of the valve is solved by another measure. That is, the light emitting arm of the double coil is divided into a plurality of (preferably two) portions, and these portions are separated by a single coil connection portion for weaker light. These connections have a lower power density as compared to a stronger light double coil portion, as will be readily appreciated by those skilled in the art. Pressing and holding the connection in the transverse web provides a close contact with sufficient heat release to the outside. This significantly reduces the heat load on the horizontal web,
As a result, the phenomenon of darkening and devitrification is prevented.

The tubular web has the advantage that the halogen circulation of the filling is hardly hindered as compared with the partition walls.

By forming the web in a trumpet shape,
No excessively thin spots which rupture at low burst pressures occur in the transition area to the valve wall, and the wall thickness is fairly uniform. The web or partition is provided after sealing and before filling. The bulb of the lamp is shaped with plungers facing each other, with the area where the web is provided heated by a torch. The advantage of this technique is that the adjustment of the position of the luminous body by the above-mentioned process will not be disturbed later, especially in the case of a frame without a beam. The web is particularly simple to fabricate by deep drawing two "glass fingers" with two rod-shaped plungers. At that time,
If both "glass fingers" contact each other, an obstruction is provided between the lamp axes. The septum is formed by a molded pinch jaw. This is accomplished by providing the desired heating and blowing into the forming pinch jaws.

[0017]

Therefore, as a whole, the halogen lamp of the present invention has a long life (200
0 hours) Halogen lamp, extremely resistant to impact,
Simple structure with few parts (no horizontal bridge). Compared with standardized halogen lamps, the tube diameter is about 2 to 4 mm and the total length is about 7 mm smaller, so that the filling volume is additionally saved due to the reduced volume of the bulb.

The halogen lamp according to the invention is suitable for use directly at the grid voltage. Its voltage range is about 8
It should be understood that the range is from 0V to 250V. Typical watt steps range from 15W to 500W. For general lighting purposes, the lamp can be surrounded by an outer bulb. Because the lamp is compact, it can also be used advantageously for reflectors (e.g. PAR-lamps, cold-light reflecting lamps) and can be selectively screwed or pinned. The luminous body is advantageously bent in a U-shape.
The invention is, however, also applicable to V-shaped luminaries.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS Several embodiments of the invention are described below with reference to the drawings.

FIGS. 1 to 3 show a halogen lamp for general lighting purposes. This lamp is 75W and 2
Directly connected to a 20V power supply network. This lamp has an outer diameter of 12.5 mm and an inner diameter of 10.5 mm (tolerance of 0.8
mm), a cylindrical quartz glass bulb 2 with a total length of about 35 mm
have. One end of the valve 2 forms a crest 3, on which an exhaust pip 4 is provided. The other end of the valve 2 is closed by a pinch seal 5. 1.65 cm ³
The valve with the volume, 80% Kr and 20% N ₂ from consisting inert gas halide additive 0.005% CB
The mixture to which rClF ₂ has been added is filled.

A luminous body 6, which is entirely double coiled and bent in a U-shape, extends over substantially the entire length of the bulb volume. A U-shaped base portion 7 extending perpendicular to the lamp axis is located near the crest 3, whereas the U-shaped legs extend from the base portion 7 toward the pinch seal 5 and open outwardly. ing. These two legs form a light emitting coil arm 18 approximately 15 mm long. The luminous body 6 is held by a frame 9. The frame 9 is bent as follows in a plane substantially including the lamp axis. That is, the valve inner wall 12
Between the two legs 10, 11 which are in close contact with each other and extend from the transverse part 13 over the inner diameter of the valve. The first leg (about 8 mm) which is significantly longer than the second leg 11
(Approximately 21 mm) extends substantially the entire length of the interior of the bulb and is embedded in the pinch seal 5 to a depth of about 0.8 mm. The straight leg 10 is bent just below the crest 3 to form a lateral portion 13. This part 1
3 forms three raised portions 14 and 15 when viewed from the front, and two valley bottoms 16 are formed between the raised portions 14 and 15. The first and third ridges 14 are each bent into a semicircle, while the second ridge therebetween forms an acute angle hook 15 which extends between two valley bottoms 16. ing. The hooks 15 are positioned slightly offset axially parallel to the plane of the frame. The hook tip 17 terminates below the bulb crest 3. Since the base 7 of the illuminant is hooked on the hook 15, the end of the base 7 is placed on the valley bottom 16. As a result, the area of the base part 7 is short-circuited via the hook 15. The transverse section 13 is configured symmetrically with respect to the axis (as viewed from the front). In that case, the third
Ridge 14 has transitioned to the second leg 11. The free end 18 of the second leg 11 is not trimmed.

As a whole, the frame is fixed in the valve by a spring action. In the unloaded state before assembly, the two semicircular ridges 14 open wider and both legs extend obliquely outward. The ends of both light emitting coil arms 8 transition to a single coil portion, which has the function of a current supply unit 19. The luminous body 6 is stretched in the bulb by welding the current supply unit 19 to the seal foil 20 in the pinch seal 5. The current supply 19 has a total length of about 6 mm and only extends from the pinch seal 5 into the valve volume about 1 to 2 mm. For this reason, other commonly used core pins for stabilization can be omitted. A contact pin 21 is additionally welded to the outer end of the foil 20. This pin projects outside from the end of the pinch seal 5.

Over substantially the entire length of both coil arms 8, a partition 22 extends between the base part 7 of the illuminator and the pinch seal 5 along the lamp axis. The transition between the cylindrical valve wall and the septum 22 is a streamlined bulge 23 to keep the wall thickness as uniform as possible.
Is performed via The partition 22 has a substantially rod-like shape.
It is formed to have a width of 1 mm, a thickness of 1 mm, and a length of about 10 mm.

FIGS. 4 and 5 show a second embodiment. This embodiment is also not substantially different from the first embodiment. However, the web is configured as a glass tube 24, which extends perpendicular to the lamp axis and the plane of the illuminator, also approximately in the center of the bulb 2, over the bulb inner diameter. The glass tube 24 has an inner diameter of about 1.2 mm near the axis, but expands to both sides toward the bulb wall to form a flared portion 25 having a diameter two to four times the inner diameter. . In the area of the lamp axis, a blockage 26 is left in the tube. The luminous body 6 'is bent again into a U-shape. Both light-emitting arms 8 'of the light-emitting body 6' are, however, additionally provided with two double-coil portions 8a, 8b.
These portions are separated by a single coil connecting portion 27 of lower luminous intensity. Base part 7 '
Are configured as a single (or double) coil. The connecting portion 27 is approximately equal to the length of the double coil portions 8a to 8b, is approximately 5 mm, and is disposed at an interval of approximately 1.5 mm with respect to the glass tube 24, so that the connecting portion 27 sags in a horizontal lighting posture. Or the two arms 8 'do not contact the glass tube 24 unless they collide. Moreover, there is no problem of darkening.

The third embodiment (FIGS. 6 and 7), whose side view corresponds to the embodiment of FIG. 5, has a structure of the lamp including the luminous body 6 'which is almost the same as that of the second embodiment. ing. The difference is that, in the case of the third embodiment, instead of one glass tube being arranged in the middle, two glass tubes 24 'are connected at right angles to the lamp axis and the plane of the illuminator, so that both connections are made. At a height of 27, it also extends between the light emitting portions 8a and 8b of the arm 8 '. The connecting portions 27 of the illuminants are fastened between the central closing portions 26 'of the glass tubes 24', respectively. As a result, both light emitting arms 8 'are fixed at the respective positions, and the free length of the arms is reduced to half (the portions 8a, 8a).
b). A glass tube holds the light emitting arm. In the case of a glass tube 24 'formed from two halves, a seam 32 is formed between both halves in the area of the closure 26'.

In this case, instead of two separate webs, the only web having an oval cross section and a crimp of a corresponding width is arranged at half the height of the valve and the coil The arm may be fixed. In this case, another narrow communication passage is provided between the upper half and the lower half of the lamp.

In a further embodiment of the lamp, in particular with a long light-emitting arm, instead of a glass tube extending in a direction perpendicular to the lamp axis (second embodiment), it is arranged vertically above and below the lamp axis. Two glass tubes extending at right angles to each other are used. The light-emitting arms are each divided into three parts, and these parts are spaced at the height of the glass tube by connecting parts.

A further embodiment is based on the third embodiment and uses four glass tubes. In this case, each two glass tubes are arranged along the light emitting arm at the height of the connection. In this case, the light emitting arm is divided into three parts.

In another embodiment (FIG. 8), the halogen lamp 1 described above is assembled in the outer bulb 30. The contact pin 21 (possibly in two parts) is embedded in a base 28 which is enclosed in the neck 29 of the evacuated outer bulb 30. The outer bulb 30 has a mushroom-shaped (or, for example, pear-shaped) swelling, and has a threaded base 31.

The invention is not limited to the embodiment shown. In particular, the present invention is suitable for a halogen lamp used in a 110 V power supply network. The two coil arms can be further divided. The filling substance can also consist of other components known per se. For example, CH ₂ Br ₂ can be used as a halogen additive.

Hard glass (especially in the case of low power stages, for example at 100 W) is also suitable as a valve material. In this case, the illuminant is connected to the contact pins via a current supply, known per se, which is embedded in a pinch seal. In the case of hard glass, the critical temperature for the stress of the glass is about 600 ° C., so that as an additional cooling measure it is advisable to provide a connection with a core which shorts this coil section. . In the case of a hard glass bulb, the separation web 24 shown in FIG. 4 has a minimum distance of 3 mm from the light emitter.

The invention makes it possible to provide an inexpensive, directly connected to a power supply, a halogen lamp with a low power consumption of at least 15 watts. This lamp is particularly suitable for general lighting. Finally, in a manner analogous to the third embodiment, a halogen lamp having a single axially extending arm with a direct light emitter is also possible. One or more glass tubes arranged at right angles to the lamp axis can fix the light emitter to one or more connection parts, also between two or more light emission parts.

This type of arrangement is also suitable for tubular halogen lamps or one-side sealed halogen lamps with a long light emitter. In particular, this embodiment provides low power (100
W), which is suitable for lamps made of hard glass bulbs.

The illustrated glass web is configured as a tube having a circular cross section. However, the tube may have an elliptical cross section. In that case, the vertical axis is aligned in the coil axis direction.

It should be further mentioned that the frame is
The drawings were explained together with the glass web, but only the frame was used independently, even if it was not used simultaneously with the web,
It has several advantages over that of EP-OS 173995. The use of frames only is particularly advantageous, especially for relatively short luminaries bent in a U-shape.

In this respect, the disadvantages of the conventional frame are, in particular, the following points: The legs are of equal length, so that they do not have a sufficient self-holding effect when the frame is introduced. As a result, the temporary fixing must be performed by mechanical auxiliary means. In addition, the frame tends to tilt in the pinch before it is fixed, because the angle of flexion of the legs is obtuse. If the legs have an obtuse angle during the sealing process, they are very inconvenient because they extend outward in the area of the pinch.
During the heating of the pinch area, the softened quartz glass is pushed out by the preload of the spring, which almost forcibly causes cracks in the pinch and impairs the tightness of the lamp.

The assembly of the loop for fixing the coil takes time and labor, and in addition, this operation is hardly mechanized. In some embodiments, the loop is fixed in the exhaust pip, which significantly hinders the exhaust, scavenging and filling processes. Furthermore, in order to enable the attachment of the loop, the illuminant must have a coilless connection piece in the base area.

After all, in the case of the support wire shown in EP-OS 173995, only a V-shaped illuminant can be used. In addition, there is a risk that a short circuit may occur between the ends of the legs of the light emitting body.

In comparison, the frame according to the invention described above is particularly simple and inexpensive to manufacture and the valve seal is reliable.

A particular advantage is that by appropriately selecting the length of the non-implanted legs, the holding action of the frame can be optimally adjusted to the lamp dimensional tolerances of the lamp.
This is not possible with the prior art.

Another advantage is that the fabrication can be completely mechanized and the internal construction can be significantly simplified. In addition, support wires having legs of different lengths are configured such that the self-locking action of the support wire during introduction into the valve is extremely effective. Thereby, on the one hand, the attitude of the support wire, and thereby also the attitude of the illuminant, is precisely fixed in spite of the tilting movement. In addition, the illuminant can be preloaded and held, and in some cases can be preloaded later. This self-retaining effect is further increased by keeping the free end of the shorter leg (shortened by at least 50%) free of cutting burrs. In particular, what is surprising about this asymmetrical leg configuration is that no problem arises even if the frame is inclined at the time of introduction. The technical prejudice of creating problems had to be overcome during the development of this frame. actually,
The length ratio of both legs is about 3: 1. The tilt position will only occur if the shorter leg is further reduced in length. In addition, the fact that the legs are straight and close to the inner wall over their entire length has a stabilizing effect. In addition, the chosen configuration does not load the pinch. At that point, only a small part of the outwardly acting spring force acts. This spring force
Rather, it acts along the entire inner wall. Overall, the tightness and life of the lamp are crucially improved. In addition, by shortening the legs, the occurrence of shadows due to the frame is reduced.

The light-emitting coil portion of the holder for the illuminant is located along two paths that are substantially parallel to each other, but this holder is significantly simplified by the hook structure, so that it is troublesome. No threading work is required, and the coil processing can be completely mechanized. In a particularly advantageous embodiment, the hook of the valve is applied to the top of the bulb,
A particularly simple stop for the correct mounting depth of the light emitter is obtained.

In order to further simplify the construction of the frame, a short circuit of the U-shaped illuminator in the non-illuminated base area has been consciously accepted. As a result, both light emitting coil portions have V
There is no longer any danger of short-circuiting between the light-emitting coil parts, which shortens their life, because they are farther apart from each other than in the case of a coil which is bent in the shape of a letter.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of a high-pressure halogen lamp.

FIG. 2 is a side view showing the halogen lamp of FIG. 1 turned by 90 °.

FIG. 3 is a cross-sectional view of the halogen lamp of FIG. 1;

FIG. 4 is a front view of a second embodiment of the halogen lamp.

FIG. 5 is a side view of the halogen lamp of FIG. 4;

FIG. 6 is a front view of a third embodiment of the halogen lamp.

FIG. 7 is a cross-sectional view of the halogen lamp of FIG. 6;

FIG. 8 is a view of an embodiment in which a globe is attached to a halogen lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Halogen lamp 2 Bulb 3 Round top 4 Exhaust pip 5 Pinch seal 6 Light emitting body 7 U-shaped base part 8 Coil arm 9 Frame 10, 11 Frame leg 12 Bulb inner wall 13 Lateral portion of frame 14 Rise 15 Hook Part 16 valley bottom 17 tip of hook 18 end of short leg 19 current supply part 20 seal foil 21 contact pin 22 partition wall 23 bulge 24 glass tube 25 trumpet part 26 closing part 27 connecting part 29 neck part 30 glove

Claims (11)

(57) [Claims] A sealed one-sided halogen lamp for use at a grid voltage, comprising a hermetically sealed bulb (2) made of a translucent material defining a lamp axis, an inert gas and A fill comprising a halogen-containing additive and a luminous body (6) located in a plane containing the lamp axis and forming two luminous arms joined together near a bulb end opposite the pinch; Formed from the material of the bulb in the form of a power supply system with electrical leads for the luminous body (6) and a frame (9) holding the luminous body (6) near the bulb end opposite the pinch A halogen lamp sealed on one side, characterized in that at least one of the webs (22; 24; 24 ') prevents the light emitting arms (8; 8') of the light emitter from contacting each other. 2. The halogen lamp according to claim 1, wherein the luminous body is bent in a substantially U-shape or a V-shape. 3. The light-emitting arm (8 ') is divided into at least two parts (8a, 8b), which parts are separated from each other by a weakly luminous connection (27). The halogen lamp according to claim 1 or 2, wherein 4. Halogen lamp according to claim 1, wherein at least one web is arranged as a separating means between the two arms of the illuminant. 5. One or more tubular webs (24 ')
Extend at right angles to the lamp axis at the level of both arms (8 ') of the illuminator, abutting against said arms and directly holding said arms. Item 6. The halogen lamp according to item 1 or 3. 6. The web (24 ') is connected to a connecting portion (2) of the luminous body.
6. The halogen lamp according to claim 5, wherein said halogen lamp is in contact with said halogen lamp. 7. Halogen lamp according to claim 5, wherein the tubular web (24 ') is closed in the middle by a closure (26'). 8. Halogen lamp according to claim 1, wherein the frame (9) holds the luminous body (6) without using a stabilizing transverse beam. 9. The tubular web (24; 24 ′) is enlarged in a trumpet-like manner toward the valve wall, preferably two to four times the minimum diameter of the web. The halogen lamp according to claim 4. 10. The halogen lamp according to claim 1, wherein the lamp is surrounded by a globe or a reflector. 11. The lamp bulb, after the introduction of the illuminant,
And after sealing of the open valve, it is heated to a point by two torches facing each other and then a rod-shaped 2
6. A method according to claim 4, wherein each of the tubular webs is formed by being pressed by a plurality of plungers.