JPH076612Y2 - Single-ended halogen incandescent light bulb - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a single-ended halogen incandescent lamp according to the general concept of claim 1.

PRIOR ART This type of halogen incandescent lamp is particularly suitable for operation at voltages of about 50 to 250V. Such halogen incandescent bulbs have a rated power of about 40-150W.

Usually, in this case, the lead-in wire (hereinafter referred to as the first lead-in wire) leading to the end of the luminous body on the side opposite to the base is supported by the tip end of the exhaust pipe on the side opposite to the base of the glass bulb. (See, for example, West German Utility Model Application No. 6804136). This construction, however, is very costly and increases the axial length of the bulb. In addition, disadvantages arise in the production process, for example in passing the phosphor lines through the support and in the cleaning process. Moreover, the accuracy of filament centering in the axial direction of the bulb is not satisfactory for a particular application.

On the other hand, there has also been proposed a light bulb in which the lead-in line leading to the end of the luminous body opposite to the base is curved at its free end into a circular shape that abuts the inner wall of the outer glass tube. This improves the axial centering of the light emitter (see, for example, US Pat. No. 3,988,505).

Similar circular loops are also used in double ended halogen lamps. In this case, many circular loops are sequentially connected to the light emitter and hang freely in the outer tube. The disadvantage of this arrangement is the relatively high spring force applied to the circular loop afterwards (US Pat. No. 3,982,145). U.S. Pat. No. 3,982,145 proposes a polygon-shaped filament holding member, preferably a heptagon-shaped holding member, as an alternative to the circular loop in double-ended lamps. Such holding members are, however, very difficult to manufacture. From the German Utility Model Application No. 7310947 a triangular holding member is known for double-ended lamps, which is inscribed in the inner diameter of the outer tube at three points, the filament being two legs in a triangle. It is held by one "edge" of parts. This holding element is in this case also connected to the light emitter. This construction, however, does not prevent the filament from being significantly displaced from its rest position in the event of an impact, whereupon the angle of the triangle changes. The holding member in the double-ended lamp is used to prevent the sagging of the relatively long illuminator, which may impair the operation of the halogen bulb. Compared with this, the light-emitting body in the single-ended halogen incandescent lamp is significantly shorter and does not require a large supporting member for sagging. On the other hand, the carrier must at the same time act as a lead-in wire and ensure the axial position of the light emitter. This means that at the end on the mouthpiece side, the lead-in wire is fixed in the press seal, while the end opposite to the die is held in that position by using the free end of the other lead-in wire. It is done by being done.

Problem to be Solved by the Invention An object of the present invention is to improve a support structure in a single-ended halogen incandescent lamp. In particular, the holding body at the end of the luminous body opposite to the base not only supports the filament but also accurately centers it in the axial direction so that it is hardly displaced from the axial position in the event of impact.

Means for Solving the Problems According to the configuration described in the characteristic part of claim 1, the above-mentioned problem is that the first internal lead-in wire is in contact with the inner wall of the outer tube, and the end of the light-emitting body opposite to the base. A top view on an intersection consisting of a leg beam and a transverse beam, each having an end region that is curved away from the inner wall of the outer tube at the height of the part, the end region having two end points each. The problem is solved by forming the end region to approximate at and bringing all four of these end points in the intersection into contact with the inner wall of the outer tube.

Advantageous embodiments are described in the other claims.

Effect of the Invention The production process in the present invention is simplified. Evacuation and encapsulation are facilitated because no support is required at the exhaust pipe tip off end. At the same time, the axial length of the bulb is reduced, so that the bulb can be enclosed at a higher pressure. Further, the centering of the light emitter is more accurate and more stable against impact, so that when the outer tube is coated with infrared light, the infrared light is reflected back to the light emitter and thus energy saving can be increased.

The device according to the invention is particularly suitable for double-coil filaments having laterally offset ends, such double-coil filaments already having as their own axially arranged double ends. It is significantly easier and more accurate to manufacture than coil filaments. The absence of a beam-passing technique in the coil wire makes it possible in a simple manner to hold the filament end offset from the bulb axis by welding. In this way, the accuracy of position adjustment is indirectly improved.

By fixing the ends of the coil filaments to the leg beams of the cross body of the first lead-in line, the displacement of the light emitter from its rest position in the axial direction is significantly reduced during impact. This is because the leg beam, with the coil filament ends fixed, causes the light emitter to actually vibrate only in the bulb axis direction upon impact (ie change in bend angle). It can be explained by the fact that it is curved at. Furthermore, this vibration is damped by abutting the remaining end points of the intersection on the inner wall. On the other hand, the position of the transverse beam with respect to the leg beam, which holds its position with respect to the bulb axis, does change, ie the angle between the leg beam and the transverse beam does change during impact. However, this is done without affecting the ends of the coil filament which are fixed to the leg beam. Another advantage is different power consumption (eg 45W or 130W) with different coil filament sizes.
It is possible to use the same type of support for the light bulb having It only changes the weld location in the leg beam of the lead-in line.

Embodiment Next, the present invention will be described based on an embodiment with reference to the drawings. 1 and 2 are two side views of a halogen incandescent light bulb 1 with a power consumption of 130 W, which are rotated by 90 ° with respect to each other. The halogen incandescent light bulb 1 is provided with a cylindrical outer tube 2 made of quartz glass, and the outer tube 2 has one end through an exhaust pipe tip-off end portion 3 and an inert gas (80% Kr, 20% N ₂ ).
And an additive of 0.2% HBr as a halogen compound is filled. A press sealing portion 4 is provided at the other end of the outer tube 2, and a ceramic base 5 having a metal screw 6 is fixed to the press sealing portion 4. Two molybdenum strips 7a, 7b are enclosed in the press-sealing portion 4, and the molybdenum strips 7a, 7b are enclosed.
2 external lead wires (not shown) to 2 internal lead wires 8,
It is connected to 9 in a conductive and vacuum-tight manner.
The two internal leads (consisting of a single piece of tungsten wire each having a diameter of approximately 340 μm) are components of the carrier 10, which in turn contains the carrier wire 11. These components are fixed at a position relative to each other by means of a quartz beam 12 arranged transversely to the axis of the bulb, the entire support being provided with a lead-in line 8 on the side opposite to the base.
Except for an end region (described later) of the lamp, the lamp is arranged in a plane including the bulb axis. (The outer diameter of the secondary coil filament is
The light-emitting body 13, which is wound with a double coil (2.7 mm and the outer diameter of the primary coil filament is 420 μm), is arranged in the axial direction and is fixed at that position by the three components of the support body 10.

The outer diameter of the secondary coil filament in a 45W bulb is 1.8
mm and the outer diameter of the primary coil filament is 350 μm. The same support is used for the two power bulbs.

In a known manner, the support wire 11 is enclosed at the first end of the quartz beam 12 irrespective of the potential, is guided parallel to the emitter 13 to the center of the emitter and is fixed there by a loop.

The first internal lead-in wire 8 of the two internal lead-in wires is guided from the press-sealing portion 4 through the molybdenum strip 7a to the second end of the quartz beam 12 and sealed therein. Then, the internal lead-in wire 8 is guided to the height of the end portion of the luminous body 13 on the side opposite to the base while abutting on the inner wall 14 of the outer tube 2.

At that point the first lead-in line 8 has a 90 ° bend 16 towards the bulb axis. The end of the lead-in wire 8 opposite the base is approximately formed into a "T" with the leg beam 17 and the transverse beam 18 in a plane transverse to the bulb axis (see FIG. 3). ). The leg beam 17 has a leg end 19 and a curved portion of the lead-in wire 8.
Connected with 16. At the head end 20, the lead-in wire 8 is bent at right angles in a plane transverse to the bulb axis and the transverse beam 18
Is guided to the first end point of. Here, the introduction line 8 is
The second end point 22 of the transverse beam 18 forming the free end of the entry line 8
It is bent back up to 180 °. In order to avoid damage to the bulb outer bulb, the lead-in line 8 has at its end 22 a short end 23 which is bent back 180 ° towards the bulb axis. The length of the leg beam 17 is about 80-90% of the length of the lateral beam 18. These two lengths are chosen such that in addition to the leg ends 19 of the leg beam 17, the two end points 21, 22 of the transverse beam 18 also abut the inner wall 14 of the outer tube. At the same time, the length of the leg beam 17 exceeds the inner radius of the outer tube, so that the leg beam 17 is in contact with the bulb axis. By this three-point fixing, the support is centered and held in the outer tube.

The second internal lead-in line 9 emerges from the press seal, comes from the molybdenum strip 7b and is guided to the quartz beam 12 via the bend. The quartz beam 12 and the second internal lead-in wire 9 are linearly guided to the end 24 on the base side of the light emitter, and are curved at a right angle.

The light-emitting body 13, which is wound with a double coil arranged axially for fixing on the support, is wound with a single coil, which is laterally displaced from the bulb axis by the radius of the secondary coil filament. With the ends 15 and 24 being open. The two ends 15, 24 of the light emitter are both internal pins 25, 26 of tungsten which are matched to their inner diameter.
Is equipped with.

The end 15 of the light emitter opposite the base crosses the leg beam 17 of the first lead-in wire 8, whereas the base end 24 of the light emitter is in the second lead-in wire 9. It intersects the curved end. At the intersection, thin platinum sheets or platinum plates 27, 28 are inserted between the intersection and the other party. Infrared reflective coating 29 on the outer wall of the outer tube
Is vapor-deposited.

During the manufacture of the light bulb, the support parts are first curved, sealed in the quartz beam and thus fixed in their position. The coil filament is then inserted into the welding jig and the fixed support is placed and welded to the end of the coil filament. In this case, the platinum small plate and the internal pin are used as welding auxiliary members. In another embodiment where the support is made of molybdenum wire, no platinum platelets are used.

The mounted support is then introduced into the bulb envelope, which is still open on one side. In the subsequent press sealing process,
The end of the light emitter on the base side is fixed, whereas the end on the side opposite to the base is automatically fixed by three-point support of the support.

The support structure of the present invention significantly reduces the displacement of the light emitter from the bulb axis compared to known supports. For this purpose, a tungsten wire having a diameter of 340 μm with respect to the lead-in wire was used to perform measurement with a 130 W light bulb having an outer diameter of 10 mm. The displacement of the light emitter from the bulb axis during the vibration test is a maximum of 0.25 mm in the case of the light bulb with the new type of three-point fixing of the present invention, whereas all supports have only one plane. Other conditions in the case of a light bulb having a known holding member (West German Utility Model Application No. 8716797), in which the introduction line on the side opposite to the base is curved like a roof If the same, the maximum deviation is 1m
Measured as m. This type of support structure of the present invention thus improves the centering of the illuminator in a single-ended halogen incandescent light bulb by a factor of four. This enhances the efficiency of the infrared-reflecting coating, because the infrared beam emitted from the emitter again heats the emitter to a high degree after reflection.

The present invention allows for higher grid voltage (eg 220V or 250V)
Can also be used for light bulbs of the type configured for. Furthermore, at a grid voltage of, for example, 120 V, it is possible to reduce the effective applied voltage to 84 V by means of a diode integrated in the base.

The present invention is not limited to the above embodiment. For example, the plane with the T-shaped end region may be inclined with respect to the plane lying transversely to the bulb axis.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a halogen incandescent light bulb, FIG. 2 is a side view of the same halogen incandescent light bulb rotated by 90 °, and FIG. 3 is a line III-III of the halogen incandescent light bulb of FIG. It is the cross-sectional view cut by. DESCRIPTION OF SYMBOLS 1 ... Halogen incandescent light bulb, 2 ... Outer tube, 3 ... Exhaust tube tip off end, 4 ... Press sealing part, 7a, 7b ... Molybdenum strip,
8,9 ... Introduction wire, 10 ... Support, 11 ... Support wire, 12 ...
Quartz beam, 13 ... Light emitter, 16 ... Curved part, 17 ... Leg beam, 18 ... Side beam, 19 ... Leg end, 20 ... Head end, 25, 26
… Internal pins, 27,28… Platinum sheet or platinum plate

Continuation of the front page (56) Reference JP-A-55-41675 (JP, A) JP-A-61-190853 (JP, A) Actually opened 50-92079 (JP, U) Actual-opened Sho-49-42782 (JP , U) Japanese Patent Sho 38-5391 (JP, B1) Real Japanese Sho 144855 (JP, Y1)

Claims (17)

[Scope of utility model registration request] 1. A cylindrical glass outer tube (2) and a base (5).
And the first internal introduction line (8) including at least two internal introduction lines (8, 9) is guided along the inner wall of the outer tube to the light emitter end (15) on the side opposite to the base, Introductory line (9)
Is an axially arranged light emitter which is connected at both ends (15, 24) to a support (10) which is guided near the bulb axis to the base end (24) of the light emitter. (1
In the single-ended halogen incandescent lamp (1), the support (10) is connected to the external lead-in wire via the press-sealing part (4). ) Is in contact with the inner wall of the outer tube, and the first internal lead-in wire (8) has the end (1) of the light emitter opposite to the base.
Curved in a plane transverse to the bulb axis at a height of 5) in which the leg beam (17) and the transverse beam (18) at this head end (20) Is in the shape of "T",
A single-ended halogen incandescent light bulb, which is formed to have three end points (19, 21, 22) in total, and in which the three end points of "T" are in contact with the inner wall (14) of the outer tube. 2. The leg beam (17) of the "T" has its leg end (1
9. The single-ended halogen incandescent lamp according to claim 1, which is connected with the curved portion (16) of the first introduction wire (8). 3. The leg beam (17) is curved at its head end (20) at a right angle and is guided to the first end point (21) of the transverse beam where it is curved by 180 °. Second
The single-ended halogen incandescent lamp according to claim 2, which is led to the end point (22) of the. 4. Single-ended halogen incandescent lamp according to claim 3, wherein the second end point (22) of the transverse beam forms the free end of the entry line (8). 5. A single-ended halogen incandescent lamp according to claim 4, wherein the free end has an end portion (23) which is bent by 180 °. 6. The single-ended halogen incandescent lamp according to claim 1, wherein the end (15) of the light emitter opposite to the base is arranged parallel to the axis of the light bulb. 7. A single-ended halogen incandescent lamp according to claim 1, wherein both ends (15, 24) of the light emitter are arranged parallel to the axis of the lamp. 8. The single-ended halogen incandescent lamp of claim 1, wherein at least one end of the light emitter is welded to the support. 9. A single-ended halogen incandescent lamp according to claim 8, wherein a small plate (28) made of platinum is inserted between the end portion of the luminous body and the support. 10. Single-ended type according to claim 1, wherein the support body (10) has a support wire (11) which is guided from the quartz beam (12) to the height of the center of the light emitter and fixed there without potential. Halogen incandescent bulb. 11. The single-ended halogen incandescent lamp according to claim 6, wherein the light emitter is a double coil, and the ends (15, 24) of the light emitter are single coils. 12. A single-ended halogen incandescent lamp according to claim 1, wherein the length of the leg beam (17) is about 80% to 85% of the length of the transverse beam (1). 13. The single-ended halogen incandescent lamp according to claim 1, wherein the outer bulb is coated with a material (29) that reflects infrared rays. 14. The single-ended halogen incandescent lamp of claim 11, wherein the ends of the single helix are laterally offset from the bulb axis by the radius of the secondary coil filament. 15. The single-ended halogen incandescent light bulb according to claim 11, wherein an internal pin (25, 26) is provided at an end of the light emitter. 16. The single-ended halogen incandescent lamp according to claim 1, wherein an end (15) of the light emitter opposite to the base is fixed to the leg beam (17). 17. Single-ended halogen incandescent lamp according to claim 1, wherein the inner conduits (8, 9) are fixed by means of a quartz beam (12).