JP2532712Y2 - High output lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a high output lamp such as a short arc lamp or a halogen lamp which is operated with a large current.

[Conventional technology and its problems]

The large output lamp is used, for example, as a light source for a projector or a light source for outdoor lighting. With the miniaturization of projectors and lamps, it is required to reduce the size of the lamp, particularly, to shorten the overall length of the lamp. Such a high-power lamp is disclosed, for example, in Japanese Utility Model Publication No. Sho 63-36607, “discharge lamp”. This will be described with reference to FIG. 5 showing one end of the lamp. In a quartz glass envelope 10, a cylindrical stem portion 2 is connected to a spherical light emitting space surrounding portion 1 in which an electrode 7 is disposed. Then, the base 3 is put on the stem portion 2, and a gap between them is filled with a packing material or an adhesive (not shown) and fixed. An electrode 7 is attached to the inner end of a current supply rod 4 made of tungsten or molybdenum. A glass 5 having a similar expansion coefficient is wound around a predetermined portion of the current supply rod 4, and a stem portion 2 is provided via a stepped glass portion 6. As a result, the current supply rod 4 is hermetically sealed in the stem 2. One end of the inner conductor 16 made of a stranded wire is welded to the current supply rod 4 and the other end is connected to the base 4.
It is connected to the.

When the lamp is turned on, the temperature of the electrode 7 becomes high, and the temperature of the current supply rod 4 also rises. Therefore, it is necessary to increase the distance L to the glass 5 where it is necessary to avoid the temperature rise. For this reason, a part of the stem portion 2 is narrowed to form a narrowed portion 2a so that the deflection of the current supply rod 4 is minimized. As a result, a space 8 is formed between the narrowed portion 2a and the glass portion 5, and a heat radiating member 9 made of, for example, a wire is wound around the current supply rod 4 using the space 8. As a result, the temperature rise of the glass 5 is suppressed, and the distance L is reduced to shorten the overall length of the lamp.

However, it is very difficult to attach the heat radiating member 9 to the current supply rod 4 in manufacturing the lamp. For example, taking a xenon short arc lamp having a power consumption of 3 kW, for example, the diameter of the current supply rod 4 is about 3 mm, and a heat-dissipating wire having a diameter of 0.5 mm is spread over the current supply rod 4 over a distance of 10 mm. Although wound into layers, this operation has the disadvantage that it is very difficult to mechanize and difficult to produce. The situation is the same even in the case of a high-output halogen incandescent lamp having a light emitting filament attached in place of the electrode 7.

[Purpose of the Invention] Accordingly, an object of the present invention is to provide a high-power lamp in which the overall length of the lamp is shortened and mechanized production is easy.

[Means for achieving the purpose]

In order to achieve the above object, in the present invention, the high-power lamp is configured as follows.

That is, a sealing body in which a stem portion is continuously provided in a light emitting space surrounding portion in which an electrode or a light emitting filament is arranged inside,
It consists of a current supply rod airtightly sealed to the stem, an electrode or light emitting filament attached to the inner end, a cap with a ventilation hole fitted to the stem, and a stranded wire, one end of which is connected to the cap. A first hole and a second hole for receiving and fixing the current supply rod and the inner conductor extending from the stem, respectively, on both sides, and a first hole for receiving the current supply rod is formed. Adapter with cooling fins provided on the outer periphery of the
The current supply rod received in the hole is fixed by brazing, and the inner conductor received in the second hole is fixed by caulking,
The cooling fins face the ventilation holes of the base.

Next, in place of the above-mentioned base, another metal assembly may be attached, but even in such a case, if the cooling fin is too large, handling becomes inconvenient, so even when the above-mentioned base is not used. The size of the cooling fins is preferably smaller within a range having a temperature rise suppressing effect. That is, a high output lamp having the following configuration may be used.

That is, a sealing body in which a stem portion is continuously provided in a light emitting space surrounding portion in which an electrode or a light emitting filament is arranged inside,
A current supply rod hermetically sealed to the stem portion and having an electrode or a light emitting filament attached to the inner end; a first hole for receiving and fixing the current supply rod extending from the stem portion; a lead wire or a fixing member; Second for receiving and fixing
First having holes on both sides and receiving a current supply rod
An adapter having cooling fins provided on the outer periphery of the portion where the hole is formed is provided, and the outer diameter of the cooling fin or the size of an imaginary circle connecting the tops of the cooling fins is made smaller than the outer diameter of the stem portion.

Further, the heat capacity of the adapter may be increased in place of the cooling fins. However, in this case, too large the volume of the adapter makes handling difficult.

That is, a sealing body in which a stem portion is continuously provided in a light emitting space surrounding portion in which an electrode or a light emitting filament is arranged inside,
A current supply rod hermetically sealed to the stem portion and having an electrode or a light emitting filament attached to the inner end; a first hole for receiving and fixing the current supply rod extending from the stem portion; a lead wire or a fixing member; Second for receiving and fixing
An adapter having holes on both sides is provided, and the outer diameter of the adapter is smaller than the outer diameter of the stem portion.

[Action]

In such a high power lamp, the first hole and the second hole for receiving and fixing the current supply rod and the inner conductor, respectively.
Since an adapter having holes on both sides is used, the adapter itself is easy to manufacture by machining. However, the current supply rod received in the first hole of the adapter is fixed by brazing, and the inner conductor received in the second hole is used. Since the fixing is performed by caulking, it is easy to automate the process, and the quality and productivity are greatly improved. Next, the cooling fins provided on the outer periphery of the portion where the first hole for receiving the current supply rod is formed face the ventilation hole of the base, so that the temperature rise of the current supply rod can be suppressed and the overall length of the lamp can be reduced. Can be achieved.

Furthermore, when the base was not used, the outer diameter of the cooling fin or the size of the virtual circle connecting the vertices of the cooling fin was made smaller than the outer diameter of the stem, or the heat capacity was increased in place of the cooling fin. Since the outer diameter of the adapter is smaller than the outer diameter of the stem, handling is easy.

FIG. 1 is a cross-sectional view of a main part of the present embodiment, and a light emitting space surrounding portion shown in FIG. It is a high-power discharge lamp in which electrodes are arranged. The stem part 2 has about 2 to 4 ventilation holes in the middle abdomen.
A bottomed cylindrical base 3 on which 31 is bored is mounted. One end of the inner conductor 16 made of a stranded wire is brazed to the bottom of the base 3 with a brazing material 14, and the inner conductor 16 and the current supply rod 4 extending from the stem 2 are connected by an adapter 11.

Here, the adapter 11 is a copper cylindrical body, and as shown in FIGS. 2A and 2B, a small-diameter first hole 11a for receiving the current supply rod 4 is formed from one end face, A large-diameter second hole 11b for receiving the inner conductor 16 from the other end surface is formed. The inner diameter of the first hole 11a is such that the clearance when the current supply rod 4 is received is about 0.2 mm on one side, and when the current supply rod 4 is brazed, the brazing material penetrates into the first hole 11a by capillary action. Thus, the current supply rod 4 can be securely fixed. Also, since the second hole 11b has a large diameter, the thickness of the adapter 11 in that portion is thin, and the inner conductor 16
And can be easily swaged. The first hole 11a and the second hole 11b communicate with each other, but may be partitioned inside. An axial cooling fin 15 extending radially is formed on the outer periphery of the portion where the first hole 11a is formed. However, as shown in FIG. 3, the cooling fins 15 may have a circumferential flange shape.

Thus, the current supply rod 4 is inserted into the first hole 11a and brazed with the silver solder 12, and the inner conductor 16 is inserted into the second hole 11b and caulked at the caulked portion 11c. The conductor 16 is connected via the adapter 11. At this time, the cooling fins 15 face the ventilation holes 31 of the base 3.

As described above, the adapter 11 has a simple shape and can be easily machined. However, the current supply rod 4 and the inner conductor 16 are inserted into the first hole 11a and the second hole 11b of the adapter 11, respectively, and then brazed and crimped. Since each is fixed, this step can be easily automated. Therefore, the quality is stabilized and the productivity is greatly improved. Further, since the cooling fins 15 face the ventilation holes 31 of the base 3, the cooling fin 15 has a large cooling effect, and the temperature rise of the current supply rod 4 is suppressed. Therefore, the overall length of the lamp can be reduced.

Although the above embodiment has been described with reference to an example of a discharge lamp, a halogen incandescent lamp in which a light emitting filament is attached to a current supply rod 4 may be used.

[Embodiment according to the invention of claim 2] Also in this embodiment, the current supply rod 4 is inserted into the first hole 11a of the adapter 11 and fixed with the silver solder 12, but the base 3 is not attached to the stem portion 2. . That is, since the base 3 is not used,
Adapter 11 is exposed. Therefore, the cooling effect is also good, and the same operation and effect as the above embodiment can be obtained.

Here, as shown in FIG. 2 (B), the cooling fin 15 has a diameter D of an imaginary circle connecting the vertices, or as shown in FIG. Smaller than the diameter. That is, it is smaller than the stem portion 2 within a range where the cooling effect is not hindered, and the handling is convenient. Then, in the second hole 11b of the adapter 11,
Although a lead wire made of a stranded wire may be inserted and fixed by caulking, a fixing member for fixing the lamp to the equipment, for example, a bolt is inserted and welded, and used for fixing to the apparatus side. Good.

[Embodiment of the Invention According to Claim 3] In this embodiment, the current supply rod 4 is inserted into the first hole 11a of the adapter 11 and fixed with the silver solder 12.
As shown in FIG. 4, the cooling fins are not provided, and the thickness of the portion where the first hole 11a is formed is large.
Therefore, the heat capacity of the adapter 11 is large, and the cooling effect is not much different from the above two embodiments, and the same operation and effect can be obtained. However, the outer diameter D of the adapter 11 is smaller than the outer diameter of the stem portion 2 so that handling is convenient. In the same manner as described above, the second hole 11b of the adapter 11 may be fixed by caulking by inserting a stranded lead wire or used for fixing to the apparatus side.

[Effect of the invention]

As described above, the large output lamp of the present invention is provided with the first hole and the second hole from both end surfaces of the adapter having a large cooling effect, and inserts the current supply rod into the first hole and brazes the second hole.
The holes are used as holes for inserting an inner conductor made of a stranded wire and fixing by caulking, so that machining and automation of the process are facilitated. When a base is used, the cooling fins of the adapter face the vents of the base, so that the cooling effect of the adapter is not hindered and the overall length of the lamp can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIGS. 2 (A) and 2 (B).
3 is a sectional view of an adapter, FIG. 4 is an explanatory view of another embodiment, and FIG. 5 is an explanatory view of a conventional example. 1 ... light emitting space surrounding portion, 2 ... stem portion, 3 ... base,
4 ... current supply rod, 5 ... glass, 6 ... joint part, 7
…… electrode, 8 …… space, 9 …… cooling member, 10 …… envelope,
11 ... Adapter, 11a ... First hole, 11b ... Second hole, 12
…… Silver brazing, 14 …… Brazing material, 15 …… Cooling fins, 16 ……
Inner conductor, 31 ... vent

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H01K 3/16 H01K 3/16

Claims (3)

(57) [Scope of request for utility model registration] 1. A sealing body having a stem portion connected to a light emitting space surrounding portion in which an electrode or a light emitting filament is disposed,
The stem is hermetically sealed, a current supply rod having the electrode or light-emitting filament attached to the inner end thereof, a base with a ventilation hole attached to the stem, and a stranded wire,
An inner conductor having one end connected to the base, a current supply rod extending from the stem portion, and first and second holes for receiving and fixing the inner conductor, respectively, on both sides; An adapter provided with cooling fins on the outer periphery of a portion where the first hole for receiving the power supply is formed, wherein the current supply rod received in the first hole of the adapter is fixed by brazing and the second hole is provided. A high-power lamp characterized in that the inner conductor received by the cooling fin is fixed by caulking, and the cooling fin faces the ventilation hole of the base. 2. A sealing body in which a stem portion is connected to a light emitting space surrounding portion in which an electrode or a light emitting filament is arranged,
A current supply rod hermetically sealed to the stem portion and having the electrode or light-emitting filament attached to the inner end; a first hole and a lead wire for receiving and fixing the current supply rod extending from the stem portion; And an adapter having a second hole for receiving and fixing the fixing member on both sides and a cooling fin provided on an outer periphery of a portion where the first hole for receiving the current supply rod is formed. A large output lamp, wherein an outer diameter of the fin or a virtual circle connecting the tops of the cooling fins is smaller than an outer diameter of the stem portion. 3. A sealing body having a stem portion connected to a light emitting space surrounding portion in which an electrode or a light emitting filament is disposed,
A current supply rod hermetically sealed to the stem portion and having the electrode or light-emitting filament attached to the inner end; a first hole and a lead wire for receiving and fixing the current supply rod extending from the stem portion; A high-power lamp, comprising: an adapter having, on both sides, second holes for receiving and fixing the fixing member and the fixing member, wherein the outer diameter of the adapter is smaller than the outer diameter of the stem portion.