JP2006080079A - Incandescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an incandescent lamp for operating with high operational safety and being produced simply. <P>SOLUTION: The lamp has a bulb (2), of which the inside (10) houses a light-emitting body (12), and which is sealed by a crushing and sealing part (8) so as to guide a current feeding part of the light-emitting body (12). For instance, in a halogen incandescent lamp provided for a middle-level voltage area and a high-level voltage area, the current feeding part has each current feeding section (30, 32) partially embedded in the crushing and sealing part (8), and each current feeding section (30, 32) is formed of a filament (40) which surrounds a plug core (42). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an incandescent lamp having a bulb, for example, a halogen incandescent lamp provided for a medium voltage region and a high voltage region, and a light emitter is accommodated in the bulb, and a current supply section thereof. Is guided through a crushing seal that seals the valve.

  DE 296 20 098 U1 discloses a halogen incandescent lamp, in which a luminous body in the form of a filament is accommodated in a lamp vessel or bulb. One side of the lamp vessel is sealed by a crushing portion, and a current supply device for the filament is led through the crushing portion. Such a lamp is driven in a medium voltage range and a high voltage range, and due to a high operating voltage, arc discharge occurs between two adjacent current supply units of the current supply device. Can do. This arc is caused, for example, by a short circuit between the filament parts, which short circuit is caused, for example, by contact of two filament legs (Wendelschenkel) (mainly in a U or V-shaped light emitter) or by filament winding. Line breaks can occur during each lamp operation. To the end of the lifetime of such a halogen incandescent lamp, critical thin spots (hot spots) may be formed in the filament, which are burned off in the process of switching on, for example. As the filament material partially burns, for example, an arc is generated between the two current supplies on the collapsed portion. This short circuit current causes a high temperature in the collapsed portion, and the lamp explodes.

  In order to prevent such a thermal overload of the collapsed part, DE 296 20 098 U1 proposes that at least a partial area of the internal current supply part is implemented with a relatively small cross-section and almost completely. It is embedded in the crushing part.

  When a short-circuit current is generated, a part of the wire is evaporated in the crushing portion, an empty capillary is generated, and the discharge continues to burn along the capillary initially. Beyond the predetermined effective length of the empty capillary, this discharge arc rapidly disappears by itself. Such a form of safety device is also referred to as an intrinsic safety device. It has been found that in many application cases it is impossible to choose a small diameter for the current supply and make this diameter comply with the provisions of DE 296 20 098 U1, which is another safety reason. Measures must be taken.

  In US-PS 4 132 922, a safety device is shown, in which the current supply is made via a U-shaped melted wire region (Schmelzdrahtbereich), the end of which is embedded in the collapsed part, and The middle part protrudes into the bulb. In this U-shaped melting wire region, a unique hermetic sheet (Dichtungsfolie) must be put in the crushing part, so that the method and apparatus technical cost for producing a halogen lamp is relatively high due to the additional members. It will end up.

The German utility model DE 91 02 566 U1 describes a safety device, in which the current supply is formed by a part wound once. These portions are inserted into the crushing portion, and the space surrounded by the filament remains as a tube-shaped space, and this space acts as an exhaust channel when an arc is generated. Such an intrinsic safety device cannot be produced without a high technical cost.
DE 296 20 098 U1 US-PS 4 132 922 DE 91 02 566 U1

  An object of the present invention is to provide an incandescent lamp such as a halogen incandescent lamp that can be operated with high operational safety and can be easily manufactured.

  This problem is solved by the characteristic configuration described in the characterizing part of claim 1 of the present invention. Particularly advantageous embodiments of the invention are described in the dependent claims.

  The incandescent lamp of the present invention is provided for operation in, for example, a medium voltage region and a high voltage region, and has a bulb in which a light emitter is accommodated. The inside is sealed by a crushing sealing portion, and a current supply unit for the light emitter is guided through the crushing sealing portion. The current supply section has a wound current supply section, which is substantially embedded in the collapsed section and surrounds the plug-in core (Einsteckkern). Here, the length of the plug-in core is adapted to the length of the current supply section. In addition, a spare fuse (Vorsicherung) is used, which is preferably accommodated in a lamp socket.

  What has been found here is that, even when a filament wire having a relatively large diameter is used, the crushing portion can be prevented from being overheated and thus the lamp can be prevented from bursting.

  Here, a reliable blow of the spare fuse is guaranteed. That is, an arc with a large current value is formed by a current supply section provided with a plug-in core and wound, and the above-mentioned spare fuse blows sufficiently fast to protect this incandescent lamp from the explosion of the lamp. Because.

  It has also been found that this embodiment can be used particularly advantageously in incandescent lamp structures in which the light emitters implemented as current supply lines and filaments must be composed of relatively large diameter wires. It is. For example, this is the case. That is, in a projection type (Noppentechnik) lamp in which the light emitter is fixed by the support projection of the bulb, the filament is designed for a relatively large output (typically> 150 W) and is therefore made from a tungsten wire with a large diameter. This is the case. This projection method is described in the applicant's EP 0 466 460 B1. In such a case, when using a tungsten wire with a large diameter (as is usual when using the protrusion method), the end of the filament from the first winding (Primaergewickel) is directly welded to the molybdenum molten sheet. In this case, the operational stability of the lamp can no longer be guaranteed by the effect of the intrinsic safety device mentioned at the beginning. In this case, if such a lamp is operated with a spare fuse, the lamp may already burst in the time until the spare fuse blows. This problem is not solved even if a more sensitive spare fuse is selected. This is because in this case, the spare fuse is overloaded by the normal lamp current, and there is a risk that the lamp will fail early due to the failure of the spare fuse overloaded by the normal lamp current. It is. The solution of the present invention allows a spare fuse to be implemented relatively insensitive so that it does not break.

  The mechanical connection between the filament of the current supply section and the plug core inserted therein is preferably made by pressing the filament in the radial direction.

  It has now been found that the same material, preferably tungsten, can be used for the filament and the plug core.

  In a particularly advantageous embodiment, the light emitter is implemented as a filament, which is bent into a U-shape or V-shape, with one or two filament portions formed on its legs. This filament part can be implemented as a double filament, where the connection region leading to the current supply section, which is implemented as the first winding and is provided with the plug-in core, is advantageously formed without winding. .

  If the filament part and the current supply section are implemented in one piece, the production of the light emitter is particularly simple.

  The lamp vessel can be housed in an outer bulb, where the outer bulb is supported by a screw-on socket.

  In the following, the invention will be described in detail on the basis of advantageous embodiments.

  FIG. 1 shows a side view of a halogen incandescent lamp for general lighting purposes, which can be used especially in the low-pressure and medium-voltage ranges.

  The halogen incandescent lamp 1 has a bulb 2, which is made from quartz glass. A rounded tip 4 is formed at one end of the valve 2 and has a pump rod addition 6 at the center. Here, when producing the halogen incandescent lamp 1, a pump tube is attached, through which the inside 10 of the bulb is evacuated and filled with a filling gas containing halogen. After filling, the pump tube is removed and the pump rod addition part 6 is melted and closed.

  A crushing sealing portion 8 is formed at the end of the bulb 2 away from the round head portion 4, and the inside 10 of the valve 2 is sealed by this crushing sealing portion.

  The interior 10 houses a light emitter 12 (hatched in FIG. 1) that is bent into a U shape in the illustrated embodiment. Here, on each leg of the U, two filament portions 14, 16; 18, 19 are constituted by double windings (Doppelgewickel). The two filament parts 14, 16; 18, 19 of each leg of U are connected via connections 20 or 22, and the upper filament parts 14, 19 in FIG. 1 extend substantially horizontally. They are connected to each other via the connection unit 24. The two filament parts 16 and 18 close to the crushing sealing part 8 are connected to short parts that act as the internal current supply parts 26 and 28.

  In the illustrated embodiment, the connecting portions 20, 22; 24 are carried out without being wound, and the internal current supply portions 26, 28 are made without being wound at least toward the crushing portion. Here, the connecting parts 20, 22, 24 and the filament parts 14, 16, 18 and 19 are made in one piece from the same winding.

  The unwound internal current supply units 26 and 28 are connected to current supply sections 30 and 32, respectively, and these are similarly made of the light emitter 12 and one piece from the windings. In the present invention, these current supply sections 30 and 32 are mostly embedded in the crushing sealing portion 8, and a relatively short end, for example, about 1 to 2 mm enters the interior 10 of the valve 2. .

  The position of the light emitter 12 is fixed by a so-called projection method in the illustrated embodiment. Here, the glass bulb 2 or the support projections 34, 36, and 38 are formed by deforming the glass bulb 2. . These protrusions are paired and extend radially inward from each other toward the connecting portions 20, 22, 24 on the diameter, and are configured as follows. That is, the connecting portions 20, 22, and 24 are sandwiched and fixed between these support protrusions, so that the light emitter 12 is securely held in the interior 10. Since this technique is described in detail in EP 0 446 40 B1, no further explanation is necessary.

  What is needed to design a filament for relatively high power consumption is that the filament winding must be relatively robust. In this way, the intrinsic safety device used in the prior art described at the beginning does not work, or at least unless it is accompanied by a decrease in operational safety. Eight superheats and explosions can occur. This is avoided in the solution according to the invention by uniquely configuring the two current supply sections 30, 32 and simultaneously using a spare fuse. The current supply sections 30 and 32 will be described with reference to FIG. This figure shows the end of the light emitter 12 located in the hatched region of FIG. According to this, in this embodiment, the internal current supply unit 26 is implemented without being wound, and is connected to the current supply section 32 formed by the first winding 40. This first winding is carried out, for example, with the same inclination as the first winding of the filament parts 14, 16, 18, 19 that are wound twice together. Of course, it is also possible to select a different slope. It is also possible to implement the internal current supply units 26 and 28 as a single winding filament.

  In the space surrounded by the first winding 40 is an insert core 42, which is made of the same material as the light emitter 12, ie tungsten, in the embodiment shown here. The connection between the plug-in core 42 and the first winding 40 is effected by pressing the filaments radially towards the outer periphery of the plug-in core in the central region 44, where this deformation is advantageously the first roll. This is done with the wire 40 heated. As can be read from FIG. 2, the first winding 40 ends just above the end of the plug-in core 42 below in FIG.

  Most of the longitudinal direction of the current supply sections 30 and 32 formed in this way is embedded in the crushing sealing portion 8, where it is welded to a molybdenum sealing sheet 46 or 48. In FIG. 1, contact pins 49 and 51 are welded to the ends of the two lower sealing sheets 46 and 48, and the ends protrude from the crushing sealing portion 8.

  The halogen burner 1 is implemented with a spare fuse as shown in the completed lamp example of FIG.

  FIG. 3 shows the completed halogen lamp, in which the halogen incandescent lamp 1 shown above is placed in the outer bulb 50. This outer bulb is supported by a screw-in socket 52. The screw-type socket has a ceramic body 54 in the illustrated embodiment, the outer bulb 50 is supported on its support flange 56, and the incandescent lamp 1 is fitted on this support flange. The support flange 56 is further provided with a screw sleeve 58 of the screw-type socket 52. Contact surfaces 60 and 62 are formed on the screw sleeve 58 and the support flange 56, and these are connected to corresponding contact pins 49 or 51 via lead wires 64 and 66, respectively. As connecting portions between the contact pins 49, 51 and the contact surfaces 60, 62, one spare fuse 68, 70 is attached in the illustrated embodiment. This spare fuse advantageously consists of a melting wire surrounded by a glass cartridge as well as external leads leading to the glass cartridge. This spare fuse is designed to “not burn out” at normal lamp current.

  In such a configuration (for example, when the end of life is reached and the illuminant 12 is burned out), this arc is applied over the crushing seal 8 in the solution according to the invention and with the current according to the invention. Due to the configuration of the supply sections 30, 32, the process proceeds with a very large current intensity. Since the intensity of this current leads to the extremely fast pre-fuses 68 and 70 being blown, the current supply is interrupted and the incandescent lamp 1 is reliably prevented from bursting. Without the current supply sections 30 and 32 implemented as in the present invention, the spare fuses 68 and 70 are used in the diameter of the tungsten wire used for the lamp implemented in the protruding manner and the light emitter 12 required at this time. It can blow out too slowly and cause the lamp to burst.

  Of course, the spare fuses 68 and 70 may be configured differently from those shown in FIG. The lamp is designed, for example, for a power consumption of 250 W at a rated voltage of 230V. The required lifetime is at least 2400 hours. In the illustrated embodiment, the diameter of the insertion core 42 is 2 mm, the length is 7.0 mm, the length of the first winding 40 is 6.9 mm, and the diameter of the wire used for the light emitter 12 is the raw material. Is 82 μm. In an advantageous embodiment of the invention, the diameter of the wire constituting the luminous body and / or filament 40 is not less than 50 μm, particularly preferably not less than 80 μm.

  Disclosed here is an incandescent lamp 1 having a bulb 2, for example a halogen incandescent lamp for medium and high voltage ranges, in which an interior 10 is advantageously provided with a wound light emitter 12. Contained. The current supply is guided through the crushing seal 8 of the valve 2 and has current supply sections 30, 32 wound in accordance with the present invention and surrounding the plug-in core 42. Preliminary fuses 68 and 70 are assigned to the incandescent lamp 1, which is blown when an arc having a large current value occurs. In the preferred embodiment, the light emitter 12 is supported on the bulb 2 by support protrusions 34, 36, 38 implemented in one piece.

It is a front view which shows 1st Example of the bulb | ball of the halogen incandescent lamp by this invention. It is a figure which shows the electric current supply part of the halogen incandescent lamp of FIG. FIG. 6 shows an example of a completed halogen incandescent lamp having a spare fuse incorporated in a screw-type socket.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Halogen incandescent lamp, 2 Bulb, 4 Round tip part, 6 Pump rod addition part, 8 Crushing sealing part, 10 Inside of a bulb, 12 Light emitter, 14, 16, 18, 19 Filament division, 20, 22, 24 Connection part 26, 28 Internal current supply section, 30, 32 Current supply section, 34, 36, 38 Support protrusion, 40 First winding, 42 Insert core, 44 Central region, 46, 48 Sealed sheet, 49, 51 Contacts Pin, 50 Outer bulb, 52 Threaded socket, 54 Ceramic body, 56 Support flange, 58 Screw sleeve, 60,62 Contact surface, 64,66 Lead wire, 68,70 Spare fuse

Claims (13)

A light-emitting body (12) is accommodated in the interior (10) of the bulb (2), and a current supply section of the light-emitting body is guided through a crushing sealing section (8) that seals the valve (2). An incandescent lamp having (2), for example, a halogen incandescent lamp provided for a medium voltage region and a high voltage region,
The current supply part has a current supply section (30, 32) partially embedded in the crushing sealing part (8),
The current supply section is formed by a filament (40);
An incandescent lamp characterized in that the insertion core (42) is surrounded by the filament. The incandescent lamp has a spare fuse (68, 70);
The incandescent lamp according to claim 1. The light emitter (12) is supported by at least one support protrusion (34, 36, 38);
The support protrusion is formed in one piece on the valve (2),
The incandescent lamp according to claim 1 or 2. The diameter of the wire constituting the luminous body and / or filament (40) is not less than 50 μm, particularly preferably not less than 80 μm,
The incandescent lamp according to any one of claims 1 to 3. The current supply unit has two unwinded internal current supply units or internal current supply units (26, 28) configured as a single-turn filament,
Each of the current supply units is provided with a current supply section (30, 32).
The incandescent lamp according to any one of claims 1 to 4. The portion (44) of the filament (40) is pressed against the plug-in core (42) by thermal deformation,
The incandescent lamp according to any one of claims 1 to 5. The current supply section (30, 32) and the insertion core (42) are made of tungsten.
The incandescent lamp according to any one of claims 1 to 6. The luminous body (12) is a filament bent into a U or V shape,
The filament leg is configured with one or two filament sections (14, 116, 18, 19),
The incandescent lamp according to any one of claims 1 to 7. The filament sections (14, 16, 18, 19) are double filaments,
The incandescent lamp according to claim 8. The current supply section (30, 32) is composed of the filament and one piece,
The incandescent lamp according to claim 8 or 9. The regions between the filament sections (14, 16, 18, 19) and the current supply sections (30, 32) are each not wound or configured as a single turn filament,
The incandescent lamp according to any one of claims 8 to 10. The current supply section (30, 32) is connected to the sealing sheet (46, 48) at the crushing sealing portion (8),
One contact pin (49, 51) is fixed to the sealing sheet itself,
The crushing sealing part (8) protrudes from the contact pin,
The incandescent lamp according to any one of claims 1 to 11. Said valve (2) is surrounded by an outer valve (50);
The outer valve itself is supported on a threaded socket (52),
The incandescent lamp according to any one of claims 1 to 12.

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