JPH11307050A - High-pressure discharge lamp, lighting device and luminaire for high-pressure discharge lamp, and manufacture of high-pressure discharge lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-pressure discharge lamp prevented from forming a coolest part that causes an accumulation of light emitting metal in an exhaust tube part connected to an airtight container, a lighting device as well as a luminaire for this lamp, and a manufacturing method of the high-pressure discharge lamp. SOLUTION: A high-pressure discharge lamp 1 equipped with a light- transmitting airtight container 2 with a longitudinal cross-section forming a curve continuous with, and substantially of a same curvature as, adjoining parts thereof at inner and outer surface parts connected with an exhaust tube 5, at least a pair of discharge electrodes 4, 4 provided in the airtight container 2, and light emitting metal and rare gas sealed in the airtight container 2, a lighting device as well as a luminaire for this lamp 1, and a manufacturing method of the high-pressure discharge lamp 1, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an airtight container forming a high-pressure metal vapor discharge lamp, a lighting device of the lamp, a lighting fixture, and a method of manufacturing the lamp.

[0002]

2. Description of the Related Art A high-pressure metal vapor discharge lamp is an inner tube lamp in which electrodes and mercury, mercury, a specific luminescent metal, and a rare gas are sealed in a hermetically sealed container made of a bulb made of a high melting point glass such as quartz glass. The lamp is sealed in an outer tube and a base is attached.

[0003] In these lamps, the luminous characteristics are greatly affected by the vapor pressure of mercury or luminescent metal sealed in an airtight container, and this vapor pressure is determined by the temperature of the lowest part in the container, that is, the coldest part. It is known.

In a high-pressure metal vapor discharge lamp, for example, a metal halide lamp, mercury and a halide such as sodium Na, thallium Tl or indium In and mercury are sealed in an airtight container. In this case, there occurs a problem that the vapor does not evaporate and accumulates, the inside of the container does not reach the predetermined vapor pressure, the luminous efficiency and the color rendering properties are lowered, and the predetermined characteristics such as an increase in the lamp voltage cannot be obtained.

[0005] Therefore, in the hermetic container, the location of the coolest portion may be a corner in a sealing portion formed at the end of the container, an embedded boundary of an internal introduction line, or an exhaust pipe projecting from the container. Many. When the coldest part does not reach the predetermined temperature, as a countermeasure, a heat insulating film is formed on the outer surface of the container, and in the case of an exhaust pipe, the protruding length is made as short as possible. .

[0006] When the coldest part is near the sealing part, it can be dealt with by forming a heat insulating film. However, the exhaust pipe is not necessary for manufacturing the lamp and is not necessary for exhausting the inside of the container and for enclosing the luminescent metal and rare gas. Also, in the case of an exhaust pipe, if the projection length is reduced, the flame of the oxyhydrogen burner for sealing the exhaust pipe extends to a part other than the area where the flame is to be sealed, and the part receiving the flame undergoes thermal deformation. It is difficult to seal the exhaust pipe along the surface of the container.

In the conventional high-pressure discharge lamp 1A, as shown in FIG. 9, the exhaust pipe 5 provided outside the top of the hermetic container 2 can be cut off at a position near the surface of the container 2 even if it can be sealed off. On the inner surface side, a concave portion 55 was formed by the through hole 53 of the remaining exhaust pipe 5. In addition, a container 2 having a small internal volume
In this case, the temperature of the container 2 rises due to the heating of the exhaust pipe 5, and the sealed gas or the like expands and blows out from the softened portion at the time of sealing.

When the discharge lamp 1A is turned on such that the top of the hermetic container 2 is directed upward, the temperature of the upper side becomes higher than that of the lower side due to convection of discharge heat between the discharge electrodes 4 and 4, for example. Even if a halide is present in the recess 55, it can be evaporated. However, when the lamp is lit with the top side of the hermetic container 2 being at the bottom, the temperature between the discharge electrodes 4 and 4 is low, and if the temperature has not reached the evaporation temperature of the halide, the temperature is particularly lower than the inner surface of the container 2. The temperature of the inside of the concave portion 55 at the pinched position has a low temperature rise, and the evaporation of the halide accumulated in the concave portion 55 becomes insufficient. As a result, there is a problem that predetermined light emission characteristics cannot be obtained.

Although the purpose is different, some lamps
The glass bulb that constitutes the airtight container does not have an exhaust pipe from the beginning, and the opening at the end of the container is directly sealed and connected to the work head of the exhaust machine, and the inside of the container is filled with exhaust gas, luminescent metal, and rare gas. After that, there is also a high-pressure discharge lamp, which is usually called chipless, in which an introduction conductor having an electrode connected to the end of the container is sealed.

However, this chipless type lamp has a complicated structure of a device for enclosing a luminescent metal and sealing an introduction conductor at an end of a container, and is applied to only some lamps.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is directed to a high-pressure discharge lamp in which a coldest portion where a luminescent metal pool is formed cannot be formed in an exhaust pipe connected to an airtight container. It is another object of the present invention to provide a lighting device for the lamp and a lighting device for the lamp.

[0012]

According to a first aspect of the present invention, a high-pressure discharge lamp according to the present invention has a vertical cross section of an inner and outer surface portion to which an exhaust pipe is connected, and a curved surface having substantially the same curvature as a continuous portion. A light-transmitting airtight container, at least a pair of discharge electrodes provided in the airtight container, and a luminescent metal and a rare gas sealed in the airtight container.

[0013] The lamp having the above structure is an airtight container (bulb).
The concave portion due to the formation of the exhaust pipe disappeared on the inner surface side of the device, and the luminescent metal such as a halide did not easily accumulate in one place on the lower surface side even when the exhaust tube forming side was turned on in a lower state.

[0014] Further, in the container exhaust process, ordinary work can be performed via an exhaust pipe. In addition, since the exhaust pipe does not protrude from the airtight container after the exhaust pipe has been sealed, the exhaust pipe does not collide with other members or the like and is not broken. In particular, in the case of small lamps, the ratio of the exhaust pipe to the container is large, and the exhaust pipe protruding at the time of lighting may act as a lens such as a prism or block light, thereby impeding light distribution characteristics. Then there is no such thing.

It is preferable that no concave portion of the trace of the exhaust pipe remains on the inner surface side of the airtight container. However, even if the light emitting metal accumulates in a slightly shallow concave portion, even if the luminescent metal accumulates, it evaporates within a short period of time. It does not inhibit.

The high-pressure metal vapor discharge lamp to which the present invention can be applied is not limited to a metal halide lamp, but may be another high-pressure discharge lamp such as a mercury lamp, a xenon lamp, or an ultra-high-pressure discharge lamp. In addition, the shape and material of the airtight container are not specified. In addition, the present invention is not limited to the one in which the sealing portion is formed at one end of the hermetic container, and may be provided at both ends thereof. It may be a sealing portion formed by contracting or a sealing portion formed by cutting off.

According to a second aspect of the present invention, there is provided a high-pressure discharge lamp having a circular or tube-shaped light-transmitting airtight container, an exhaust pipe provided in the airtight container, and sealing after the evacuation in the container. A closed hole formed by flowing the exhaust pipe glass so as to be substantially continuous with the inner and outer surfaces of the container, at least a pair of discharge electrodes provided in the hermetic container, and sealed in the hermetic container Characterized by comprising a light-emitting metal and a rare gas. The same operation as described in the first aspect is achieved.

The translucent airtight container made of a circular or tubular glass bulb as used in the present invention is not limited to a perfect circle but includes a spherical shape, an oval shape, an elliptical shape and the like.

A high-pressure discharge lamp according to a third aspect of the present invention is characterized in that the discharge lamp has a multi-tube structure in which the discharge lamp is housed in an outer tube.

By adopting a double tube or triple tube structure,
It keeps the lamp in the outer tube warm and prevents its scattering when the lamp ruptures.

According to a fourth aspect of the present invention, there is provided a lighting device for lighting a high-pressure discharge lamp according to any one of the first to third aspects, and connecting the high-pressure discharge lamp to an output side for lighting. And a circuit.

A normal lighting is performed by connecting the high pressure discharge lamp according to any one of claims 1 to 3 to an output side of a normal lighting circuit having a ballast such as an inverter. Can be.

According to a fifth aspect of the present invention, there is provided a lighting device according to any one of the first to third aspects, wherein the main body of the lighting device, the reflector provided on the main body of the lighting device, and the reflector are provided. A high-intensity discharge lamp as described above, and a lighting circuit provided in the appliance main body or separately.

The operation described in the first to fourth aspects is achieved. Further, the lighting circuit may be provided in the appliance main body or may be provided separately.

According to a sixth aspect of the present invention, in the method for manufacturing a high pressure discharge lamp, the exhaust pipe provided in the light-transmitting hermetic container in which the luminescent metal, the rare gas, and the discharge electrode are sealed is provided. The method is characterized in that a burner that can be spot-heated at the end is directed and sealed.

The sealing of the exhaust pipe is performed by using a burner capable of heating the sealing portion in a small area in a concentrated manner, for example, a plasma arc, so that the heating area is locally (spotted) finely and concentrated to heat unnecessary parts. Can be prevented. Further, it is easy to automate the work, for example, the glass can be melted in a short time.

The heating burner used at the time of final sealing (chipping) is not limited to a plasma arc.
Other means can be used as long as they can be concentratedly heated in a spot.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a front view showing a 150 W one-end sealed metal halide lamp, and FIG. 2 is a partially cross-sectional front view showing an internal lamp part in FIG. 1 in an enlarged manner.

In the figure, 1 is a high-pressure discharge lamp, 2 is an airtight container constituting the lamp 1, and this airtight container 2 is crushed and sealed at one end side of a container (bulb) whose discharge space made of quartz glass has a substantially elliptical shape. It has a one-end sealed shape in which the portion 21 is formed.

A metal foil 31 made of a pair of molybdenum Mo foils or the like is hermetically sealed in the crushed sealing portion 21, and one end of each of the metal foils 31, 31 is provided with tungsten W extending into the container 2. The base end of the internal introduction line 32 made of a high melting point metal such as molybdenum Mo, and the other end of the external introduction line 33 such as molybdenum Mo extending outside the container 2 at the other end by means such as spot welding. Connected. Also, 4,
Reference numeral 4 denotes a discharge electrode provided opposite to the tip of each of the internal introduction lines 32.

Reference numeral 5 denotes an exhaust pipe provided at the top of the airtight container 2 on the side opposite to the crushed sealing part 21. As will be described later, a closed part 54 is provided in a through hole 53 of the exhaust pipe 5, The vertical cross section of the inner and outer surfaces of the airtight container 2 provided with the exhaust pipe 5 is
It has a curved surface with substantially the same curvature that is continuous with the adjacent portion except for a slight concave portion 55.

The container 2 contains a luminescent metal selected from dysprosium Dy, holmium Ho, thulium Tm, cesium Cs, scandium Sc, tin Sn, sodium Na, thallium Tl, indium In, lithium Li and the like. , Mercury, and a rare gas such as argon Ar or xenon Xe.

Reference numeral 6 denotes an outer tube made of quartz glass containing the discharge lamp 1 therein.
1, a pair of metal foils 62, 62 are hermetically sealed in the sealing portion 61 in the same manner as above, and one end of each of the metal foils 62, 62 is sealed with the airtight container. External lead-ins 33, 33 extending from 2 are connected directly or via another conductive member. Reference numeral 68 denotes a base joined to the crushed sealing portion 61 of the outer tube 6, and external lead wires (not shown) connected to the metal foils 61, 61 are connected to terminal pins 69, 69 of the base 68. Have been. Further, the inside of the outer tube 6 is in a vacuum or an inert gas atmosphere, and the gas in the outer tube 6 is also replaced through the exhaust pipe 63, and a normal exhaust pipe tip 64 is provided at the tip,
These constitute a double-tube high-pressure discharge lamp L.

When the lamp L having such a configuration is turned on with the base 68 side upward, the base end side of the exhaust pipe 5 formed at the top of the hermetic container 2 is located downward, and the temperature rises. The coldest portion is formed at the lowest temperature, but the inner surface portion of the top portion may be set at a temperature higher than the evaporation temperature of the halide. Further, since there is no outwardly protruding concave portion in which the halide accumulates in this portion, most of the halide enclosed in the container 2 can be evaporated, and a predetermined luminous efficiency,
Light emission characteristics such as color rendering and lamp voltage can be obtained.

Further, since the exhaust pipe 5 does not protrude from the airtight container 2, it does not break due to collision with other members or the like.
It is easy to handle during production yield, transportation and storage.
In particular, in the case of a small lamp, the ratio of the exhaust pipe 5 to the container 2 is large, and the exhaust pipe 5 protruding at the time of lighting may act as a lens such as a prism or block light, thereby impeding light distribution characteristics. This can be prevented.

Next, a manufacturing (exhausting process) procedure of the hermetic container 2 constituting the discharge lamp L will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 3 is an explanatory view showing a stage in which the exhaust pipe 5 of the airtight container 2 connected to the exhaust device is closed, and FIG.
(A)-(e) is explanatory drawing which shows the sealing situation sequentially.

First, an outer diameter of about 13.5 mm and an inner diameter of about 10.
A glass tube made of 5 mm quartz glass is prepared, and the glass tube is heated with an oxyhydrogen burner to have an inner volume of about 13 mm in a major axis (direction perpendicular to the axis of the tube) and about 10 mm in a minor axis (axial direction of the tube). A hollow approximately elliptical shape portion 22 of 0.5 cc and a width of approximately 10 mm, a length (in the direction of the tube axis) of approximately 20 mm, a thickness of approximately 5 mm, and After forming a substantially rectangular shaped sealing portion having a cavity communicating with the hollow substantially elliptical portion 22, an outer diameter of about 4.3 mm made of quartz glass and an inner diameter of about 2. 2
mm is connected to the exhaust pipe 5 to form a container (valve).

The length is about 11 mm, the width is about 2 mm,
Molybdenum Mo foil 31 having a thickness of about 20 μm has an outer diameter of about 0.4 to 0.5 mm and a length of about 12 mm at one end thereof.
An inner lead wire 32 made of a rhenium Re wire and an outer lead wire 33 made of a molybdenum wire having an outer diameter of about 1 mm and a length of about 20 mm are spot-welded on the other end side. Note that a discharge electrode 4 in which a tungsten W wire is wound is provided at the tip of the internal introduction wire 32.

Then, the external introduction lines 33, 33 are inserted into mounting holes of a mount support of a sealing device (not shown) and supported and fixed in an upright state. The container is supported when the maximum major diameter portion of the substantially elliptical portion 22 is at substantially the same height position as the discharge electrodes 4 and 4. In this sealing, if the intermediate portion between the two internal introduction wires 32, 32 is fixed with a glass bead or the like, a predetermined distance between the discharge electrodes 4, 4 can be secured, and the sealing operation can be easily performed. is there.

Next, a through hole 5 is formed from the top of the exhaust pipe 5 at the top.
While a non-oxidizing gas such as nitrogen gas is introduced through 3, the substantially rectangular sealed portion of the container is heated from the outer surface with an oxyhydrogen gas burner, and when the glass in this portion is melt-softened, a pair of pressing is performed from both sides. The crushed sealing portion 21 is formed by crushing flat by a mold, and the metal foils 31 and 31 are hermetically sealed in the glass.

The container 2 in which the metal foils 31 and 31 are sealed in this manner is then air-tightly attached to the exhaust head 71 of the exhaust device 7 as shown in FIG. . The evacuation device 7 is connected to an evacuation path such as a vacuum pump, a rare gas path such as argon and nitrogen, and a luminous metal supply device (none is shown) such as mercury in some cases. A rubber band (not shown) for airtightly connecting the tube 5 is provided.

Then, the container 2 made of glass is heated to discharge the impurity gas from the inner wall of the container or the like while discharging the exhaust head 7.
When the inside of the container 2 is evacuated from the exhaust pipe 5 connected to 1 and reaches a predetermined degree of vacuum, for example, SnI ₂ -TlI-InI-
NaI-NaBr-LiBr-CsI: 31: 9: 1:
About 2 mg of halide, about 15 mg of mercury, and about 150 T of argon gas having a composition ratio of 33: 13: 1: 12
After orr sealing, the portion of the exhaust pipe 5A about 100 mm away from the end of the valve is heated with an oxyhydrogen burner and sealed (chipping) to form a first chip 51, and the valve is taken out of the exhaust device 7.

Thereafter, when the container 2 is cooled, the portion of the exhaust pipe 5B about 5 mm from the end of the container 2 is heated with an oxyhydrogen burner and cut off (chipping) to form a second chip 52. Then, the second chip 52 is connected to the second chip 52 as shown in FIGS.
The third chipping is performed through the process shown in FIG.

This third chipping is performed by the second chip 52
Is heated by, for example, a plasma arc ejected from a torch portion 81 connected via a gas supply control section of a plasma arc generator and a plasma gas supply pipe. (FIG. 4A) When the tip of the tip 52 of the exhaust pipe 5 is melted and the melted glass liquid starts flowing down into the through hole 53, the torch 81 is gradually lowered (the container side may be raised). )) Move the heating area downward. (FIGS. 4B to 4D) When the inside of the through hole 53 of the exhaust pipe 5 at the top of the container 2 is filled with glass, the heating by the plasma arc from the torch part 81 is stopped. At this time, the portion of the exhaust pipe 5 protruding from the top of the container 2 is melted to fill the through hole 53 to form a closed portion 54, and a slight concave portion 55 indicating the trace of the through hole 53 remains on the inner surface thereof, The inner and outer surface portions of the top are formed with a curved surface substantially the same as the curvature of the adjacent valve. In addition, it is preferable that the concave portion 55 in the trace of the through-hole 53 of the exhaust pipe 5 does not remain. Absent. (FIG. 4E) The plasma arc generator 8 includes a discharge current controller and a plasma gas supply control unit 82, and is connected to the torch unit 81 via a plasma gas supply pipe 83. The fusing operation can be easily controlled by providing a CCD camera 84 and the like for monitoring the melting and flowing conditions of the glass and a device for moving the torch 81 relative to the valve side. The torch 82 has a nozzle tip, an electrode made of a tungsten rod, a gas nozzle, and the like.

When the heating control of the exhaust pipe tip 52 by the plasma arc generator 8 is performed as shown in the block diagram of FIG. 5, the work can be automated, and the work is excellent in quality with little variation in quality. Can be easily performed. That is, when a signal indicating that the tip of the tip 52 and the torch portion 81 face each other is received, a plasma arc is supplied from the plasma arc generator 8 to the torch portion 81 via the plasma gas supply pipe 83. When the melting of the chip 52 is started by the plasma arc from the torch part 81, the torch part 81 and the container 2 side are relatively moved to change the heated part.
Then, when the monitoring camera 84 detects that the inside of the through hole 53 of the exhaust pipe 5 is filled with glass, the signal is fed back to the plasma gas supply control unit 82 to stop the output from the plasma arc generator 8. The exhaust pipe according to the above-described embodiment has the same dimensions as the exhaust pipe, and the time required for the final sealing of the exhaust pipe 5 is about 2.5 to 3.0 seconds.

The double tube type high-pressure discharge lamp L is used, for example, by mounting it on a lighting fixture 9 as shown in FIG. In FIG. 6, reference numeral 91 denotes an instrument main body.
1 is provided with a bowl-shaped reflector 92 having a reflection surface formed thereon, and a base 68 of the lamp L is provided at the center of the base of the reflector 92.
A socket (not shown) to which is mounted is provided. Reference numeral 93 denotes a light control member such as a light-transmitting protective cover or a lens for controlling light distribution, which covers the front surface of the reflector 92 and the lamp L; 94, a holding cover of the light control member 93;
1, a hanging arm capable of adjusting the direction, 96, a base having an attachment portion to a ceiling, a pillar, a wall, or the like; 97, a housing attached to the hanging arm 94, a lighting circuit having a stabilizer such as an inverter. 9C is accommodated. 98 is the base 9
5, a power supply line connecting the lighting circuit 9C and the socket.

FIG. 7 shows a lighting device 9C for the lamp L.
9S is a power supply unit, 9V is a ballast such as an inverter connected to the power supply unit 9S, and its output terminals 9T, 9T are equipped with terminal portions of the base 68 of the lamp L. Socket is connected.

In this configuration, when the switch of the power supply section 9S is turned on, the output terminals 9T, 9T of the lighting circuit 9C are turned on.
The power suitable for stably lighting the lamp L is supplied to the terminal pins 69, 69, 69, 69 of the base 68 via the power supply lines 98, 98.
It is supplied to the external introduction lines 33, 33, the metal foils 31, 31, and the internal introduction lines 32, 32, and discharge is maintained between the distal ends of the discharge electrodes 4, 4 formed on the internal introduction lines 32, 32, so that a predetermined amount is maintained. Light emission having characteristics is performed.

Further, the direct light from the lamp L and the reflected light from the reflector 92 are radiated forward from the lighting device 9 to exhibit a predetermined light distribution.

The present invention is not limited to the above embodiment. For example, the high-pressure metal vapor discharge lamp is not limited to a metal halide lamp, but may be another high-pressure discharge lamp such as a mercury lamp or a xenon lamp. The shape and material of the hermetic container (bulb) forming the lamp are substantially elliptical as shown. The shape is not limited to quartz glass, but may be a straight tube (shown in FIG. 8 (a)), an elliptical shape (shown in FIG. 8 (b)), a spherical shape, a curved tube, or the like. The material is borosilicate glass or aluminosilicate. The lamp may be made of hard glass such as glass. When the container is made of hard glass, the conductor hermetically sealed in the sealing portion is a molybdenum Mo wire or the like having a circular cross section. In this case, an internal introduction line portion, a sealing line portion, and an external introduction line portion are used. May be an introduction line formed of the same line.

The hermetic container (bulb) is not limited to a one-end sealed lamp, and the main discharge electrode and the auxiliary electrode for starting may be provided at both ends of the hermetic container (bulb) (one end may be only the main discharge electrode). Of course, the present invention can be applied to a sealed discharge lamp of both ends sealing type. Further, the sealing is not limited to the crush sealing formed by a mold, but may be a baking seal or a burn-down seal.

In the above embodiment, the lamp having the double tube structure in which the inner tube lamp 1 is housed in the outer tube has been described. However, the inner tube lamp is directly mounted on the lighting equipment without using the outer tube. It can also be applied to lamps that use

Further, sealing (chipping) of the exhaust pipe.
Is repeated three times. For example, the first sealing (chipping) is performed at about 5 mm from the base end of the exhaust pipe, and the second sealing (chipping) is performed by plasma arc twice. May be completed (chipping).

The pre-final sealing (chipping) is only required to have a sufficient amount of glass to fill the through hole of the exhaust pipe at the time of final sealing (chipping). The tip length of the exhaust pipe may be determined in consideration of the thickness of the exhaust pipe.

Further, the reflector used in the above-mentioned lighting equipment is not limited to a bowl shape, but can be selected according to the shape and use of the lamp such as a gutter shape. Further, a light control body may not be provided on the front surface of the reflector. Further, the lighting circuit is not limited to one using an electronic ballast such as an inverter, but may be one using a wound ballast.

[0056]

According to the first and second aspects of the present invention, normal exhaustion, luminous substance and rare gas can be sealed in the hermetic container (valve) via the exhaust pipe. Further, since the exhaust pipe does not protrude from the container, it is possible to prevent an accident in which the exhaust pipe is broken and also to prevent light radiation from the container from being blocked or refracted.

Further, since no concave portion is formed on the inner surface of the container due to the connection of the exhaust pipe, the encapsulated luminescent metal is reliably evaporated, and the high-pressure metal which does not decrease the luminous efficiency, the color rendering property, the luminous characteristics such as the lamp voltage, etc. This has the advantage that a vapor discharge lamp can be provided.

According to the third aspect of the present invention, the present invention can be applied not only to a discharge lamp in which the hermetic container itself is exposed and used, but also to a discharge lamp having a multi-tube structure in which the hermetic container is further housed in an outer tube. Thus, the same effect as described in the first aspect can be obtained.

According to the fourth aspect of the present invention, the discharge lamp according to the first to third aspects can be lit with high light emission characteristics.

According to the fifth aspect of the present invention, the effects described in the first to fourth aspects are achieved by applying the present invention to a lighting fixture.

According to the sixth aspect of the present invention, the heating range can be concentrated and directed in a spot manner to prevent unnecessary portions from being heated and to melt the glass in a short time. And a method for manufacturing a high-pressure discharge lamp having advantages such as easy automation.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a high-pressure discharge lamp (one-end sealed metal halide lamp) of the present invention.

FIG. 2 is an enlarged partial cross-sectional front view showing an inner tube portion in the lamp of FIG. 1;

FIG. 3 is an explanatory view showing a stage in which an exhaust pipe of an airtight container connected to an exhaust device is closed.

4 (a) to 4 (e) are explanatory diagrams sequentially showing a situation in which an exhaust pipe of an airtight container is closed.

FIG. 5 is a block diagram showing heating control of an exhaust pipe tip by a plasma arc generator.

FIG. 6 is a perspective view showing an embodiment of a lighting fixture using the high-pressure discharge lamp of the present invention.

FIG. 7 is a schematic circuit connection diagram showing an embodiment of a high pressure discharge lamp lighting device according to the present invention.

8 (a) and (b) are partial cross-sectional front views showing another embodiment of the high-pressure discharge lamp (both ends sealed) of the present invention.

FIG. 9 is an enlarged front view showing a conventional high-pressure discharge lamp (one-end sealed type).

[Explanation of symbols]

 L: Double tube high pressure discharge lamp 1: High pressure discharge lamp 2: Airtight container (glass bulb) 21: Sealing part 31: Metal foil 4: Discharge electrode 5: Exhaust pipe 51: First chip 52: Second chip 53 : Through-hole 54: Closed part 9: Lighting fixture 91: Fixture main body 92: Reflector 9C: Lighting device

Claims (6)

[Claims] 1. A translucent airtight container having a vertical section of an inner and outer surface portion to which an exhaust pipe is connected and having a curved surface having substantially the same curvature as a continuous portion, and at least one pair of airtight containers provided in the airtight container. A high-pressure discharge lamp comprising: a discharge electrode; and a luminescent metal and a rare gas sealed in the hermetic container. 2. A light-transmitting hermetic container having a circular or tubular discharge space; an exhaust pipe provided in the hermetic container; A through hole blocking portion formed so as to flow into a substantially continuous surface; at least one pair of discharge electrodes provided in the hermetic container; and a luminescent metal and a rare gas sealed in the hermetic container. A high-pressure discharge lamp characterized in that: 3. The high-pressure discharge lamp according to claim 1, wherein the discharge lamp has a multi-tube structure housed in an outer tube. 4. A high-pressure discharge lamp according to claim 1, further comprising: a lighting circuit connected to an output side of the high-pressure discharge lamp for lighting. Lighting device that is. 5. An apparatus main body; a reflector disposed on the apparatus main body; a high-pressure discharge lamp according to any one of claims 1 to 3 disposed on the reflector; Or a lighting circuit provided in a separate body. 6. Sealing an exhaust pipe provided in a light-transmitting hermetic container in which a light emitting metal, a rare gas and a discharge electrode are sealed, by directing a burner capable of spot heating at a base end of the exhaust pipe. A method for manufacturing a high-pressure discharge lamp characterized by the following.