JP2011249292A - High-pressure metal vapor discharge lamp and lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-pressure metal vapor discharge lamp, one whose support member for fixedly holding a luminous tube includes an elastic locking member having a function for preventing an outer tube bulb made of glass from falling off, which has had its quality and productivity improved by reducing a possibility of damaging the outer tube bulb or a coating film formed on the bulb, and a lighting apparatus having this discharge lamp installed therein.SOLUTION: A high-pressure metal vapor discharge lamp L1 comprises an outer tube bulb 1 made of glass having a neck section 13 continuous from a swollen section 11, a support member 3, a luminous tube 4 fixedly supported by and electrically connected to the support member 3, a pair of elastic locking members 6 and 6 whose one end sides are fixed to the support member 3 and having a bent section 64 which contacts the neck section 13 and a bent section 62 which protrudes to the swollen section 11 formed at an intermediate part, and a base 7 joined to the end part of the bulb 1. Also pertinent to the present invention is a lighting apparatus (utensil) 9 which has this discharge lamp L1 installed therein.

Description

  Embodiments of the present invention relate to a high-pressure metal vapor discharge lamp in which an arc tube is sealed in an outer tube bulb via a support member, and a lighting device equipped with the discharge lamp.

  The high-pressure metal vapor discharge lamp includes an outer tube bulb, a stem sealed at the end of the bulb, an arc tube fixedly supported by the support member of the stem, a base joined to the sealing portion of the outer bulb, etc. It consists of

  The arc tube has an electrode assembly disposed and fixed opposite to both ends of a hermetic vessel made of ceramic such as quartz glass or alumina, and a discharge made of a rare gas such as mercury or a metal halide as a light emitting metal and argon. The medium is enclosed.

  When this discharge lamp is fed to the arc tube via a cap-stem lead-in wire-support member, etc., it emits mercury or metal halide enclosed by the action of discharge generated between both electrodes in the arc tube. However, since the atomic density and temperature during lighting are considerably high, the emission spectrum is used in various applications as a light source exhibiting various wavelength ranges and high efficiency and high color rendering.

  This kind of high-pressure metal vapor discharge lamp is rarely cracked in the sealing part between the outer bulb and the stem or the neck part in the vicinity of this sealing part when the lamp is mounted on the lighting device socket or during lighting. May occur.

  The occurrence of cracks in the vicinity of the sealing part is caused by heating and melting the neck part of the glass outer tube valve with a burner during the sealing operation, so that the stem of the same kind of glass is hermetically fused. The glass in the vicinity of the stop has a uniform thickness and does not shrink or bulge, resulting in thick or thin parts, progress of minute scratches or cracks, processing residual strain strength, and partial differences in strain Or it originates in the distortion etc. which arise at the time of spot-like heating which connects the external lead-in | lead-out led out from the valve | bulb using a brazing material.

  That is, when a screw-in (E) type cap is screwed into a socket, a strong torsional stress is applied to the sealing part of the outer tube bulb or the neck part in the vicinity thereof, or mechanical shock such as thermal shock or vibration due to lamp flashing When an impact or the like acts on a thin portion, a minute scratch or crack, or a portion with a large amount of strain, breakage such as a crack or a crack may occur.

  For this reason, the above-mentioned high-pressure metal vapor discharge lamp with a multi-tube structure is prepared for the case where the neck portion of the sealed portion or the processing portion in the vicinity of the sealed portion is broken and separated due to damage or distortion of the outer tube bulb. It is necessary to prevent the pipe valve from falling off.

JP 2010-56081 A

In order to prevent the outer tube valve from dropping, for example, one end side is attached and fixed to a pair of support members, and the other end (intermediate portion) side has a locking portion that is bent and expanded larger than the inner diameter of the neck portion of the outer tube valve. Discharge lamps are known. (Patent Document 1)
By applying the invention of Patent Document 1, it was possible to prevent the valve from being dropped even if the valve was separated from the neck portion by causing a crack in the sealing portion of the outer tube valve.

  However, in the invention of Patent Document 1, when the stem that fixedly supports the arc tube is inserted into the outer tube bulb, a pair of engaging portions having a larger passing dimension than the inner diameter of the neck portion pass through the neck portion of the outer tube bulb. After that, the elasticity is released, and the reaction causes the coating on the inner surface of the bulb, such as the light diffusing film and the reflective film, to be undesirably peeled off, and in severe cases, the inner wall surface is scratched with minute scratches. There were problems such as cracking due to elongation by mechanical impact.

  The present invention has been made in view of the above problems, and is provided with an elastic locking member having a function of preventing the fall of a glass outer tube valve, and damages the coating formed on the outer tube valve or the valve. An object of the present invention is to provide a high-pressure metal vapor discharge lamp capable of reducing the quality and productivity which can be reduced, and a lighting fixture equipped with the discharge lamp.

  According to this embodiment, a glass outer tube valve that is connected to the bulging portion and has a neck portion having a smaller diameter than the bulging portion, and a support that is at least partially disposed in parallel in the outer tube valve. An arc tube that is fixedly supported and electrically connected to the support member along the outer tube valve axis, and one end side is fixed to each side portion of the support member arranged in parallel, and the outer tube valve It has two bends that extend in the same direction and project sideways in the middle part toward the other end, and the maximum distance between the one bends facing each other is larger than the minimum inner diameter part of the neck part. And a pair of elastic locking members formed so that the other bent portion elastically contacts the inner wall surface of the neck portion, and a base that is joined to the outer tube bulb and electrically connected to the arc tube. High characterized by Metal vapor discharge lamp and the discharge lamp is a lighting device mounted (instrument).

  According to the present invention, even if the outer tube valve is broken and separated, the elastic locking member can prevent the outer tube valve from dropping, and the elastic locking member contacts the bulging portion of the outer tube valve and is formed on the valve. It is expected to provide a high-pressure metal vapor discharge lamp and a lighting device (equipment) with improved quality and safety that can prevent damage to coatings such as light diffusion films and reflection films.

It is a front view which shows the outline of the high pressure metal vapor discharge lamp of embodiment. It is an enlarged front view which shows the outline of the elastic locking member which is the principal part in FIG. 1, and its vicinity. It is a front view of the principal part of the stem in which the arc tube and elastic locking member before outer tube bulb insertion were provided. It is an enlarged front view which shows the outline of the other elastic locking member used for the discharge lamp of embodiment, and its vicinity. It is a partial cross section front view which shows the outline of embodiment of the illuminating device (equipment) equipped with the said high pressure metal vapor discharge lamp which concerns on embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a front view showing an outline of a metal halide lamp, for example, as a high-pressure metal vapor discharge lamp, FIG. 2 is an enlarged front view showing an outline of one elastic locking member in FIG. 1, and FIG. It is a front view of the principal part of the stem provided with the arc tube and the elastic locking member.

  The metal halide lamp L1 shown in the figure includes an outer tube bulb 1 made of glass, a stem 2 sealed at one end of the outer tube bulb 1, and a pair of support wires 31, 31 provided on the stem 2. A support member 3; an arc tube 4 fixedly supported by the support member 3 and supplied with power; and elastic locking members 6 and 6 having one end connected and fixed to both support lines 31 and 31 of the support member 3; The main body is composed of a base 7 joined to the end of the outer pipe valve 1.

The outer tube bulb 1 is made of translucent hard glass such as borosilicate glass. The outer bulb 1 has a bulging portion 11 at the center and is connected to the bulging portion 11 on the lower side of the figure. It has a so-called BT shape in which a small diameter portion is formed on the closed top portion 12 and the upper neck portion 13. An end portion of the neck portion 13 has a sealing portion (not shown) with the stem 2, and an E (screw-in) base 7 is attached to cover the sealing portion. Further, the inside of the outer tube valve 1 is filled with an inert gas such as argon (Ar), nitrogen (N ₂ ) or the like, or is in a vacuum atmosphere.

  The stem 2 is formed of a flare stem having one end side expanded, and a glass tube 21 made of substantially the same material as the outer tube bulb 1 is used. At least a pair of introduction conductors 22 and 23 are sealed. Although the support member 3 may be directly connected to the introduction conductors 22 and 23, in this embodiment, a wire or plate-like body such as molybdenum (Mo) is used, and here the linear support wire 31 is a substantially rectangular shape. A frame member having a portion parallel to the axis of the bulb 1 at least partially is fixed and supported on a band member 32 wound around the glass tube 21 of the stem 2 by means such as fastening.

  The arc tube 4 is formed with crush sealing portions 42 and 43 at both ends of a straight tube arc tube container 41 made of translucent quartz glass. One end side is formed in the both crush sealing portions 42 and 43. A sealing member 53 made of a metal foil such as molybdenum (Mo) having an electrode shaft 51 made of tungsten (W), molybdenum (Mo), etc. and an external introduction conductor 52 connected to the other end is hermetically sealed. Yes.

  The tip of each of the electrode shafts 51, 51 may be directly used as the electrode 5. The coiled electrode 5 is formed by winding a wire made of tungsten (W) or tungsten (W) containing thorium (Th) at the tip. , 5 are provided opposite to each other. Further, in the crushing sealing portion 42 on the upper side, another metal foil 54 is sealed apart from the metal foil 53, and a starting auxiliary electrode 5s is connected. The electrode shaft 51, the external introduction conductor 52, the sealing member 53, and the coiled electrode 5 constitute an electrode assembly.

  Further, the discharge space in the arc tube vessel 41 is filled with a rare gas such as a predetermined amount of metal halide for light emission (and mercury (Hg) if necessary) and argon (Ar) as a discharge medium. . As the metal halide, a halogen such as iodine (I) or bromine (Br) and at least one luminescent metal such as sodium (Na), scandium (Sc), or cesium (Cs) are encapsulated, and the luminous efficiency. , Improving color rendering properties and color temperature.

  The arc tube 4 in the outer tube bulb 1 is supported by positioning the arc tube 4 along the longitudinal (tube axis) direction of the support member 3 formed into a substantially rectangular frame shape by the support wire 31, and forming a strip-shaped metal. The arc tube 4 is fixed by connecting the support portions 31 and 31 parallel to each other with the sealing portions 42 and 43 sandwiched between the band members 33 and 34 made of plates.

  In the case where the support of the arc tube 4 is unstable with the above-described configuration, metal blade-like elastic members 35 and 35 are provided on the side surface of the support member 3 (the elastic members 35 and 35 are on the neck portion 13 side). The elastic members 35, 35 are elastically brought into contact with the inner peripheral surface of the top portion 12 of the outer tube bulb 1, and the arc tube 4 itself is made to act as a main column. The outer tube valve 1 can be supported so as to be on the central axis.

  Although not shown, in order to prevent scattering of fragments when the arc tube 4 is broken, it is necessary to provide a translucent hollow tube having a cylindrical shape surrounding the arc tube 4 and having upper and lower ends made of quartz glass or the like. There is no problem. In this case, the arc tube 4 and the hollow tube can be fixedly supported on the support member 3 using a disk-shaped or ring-shaped support.

  Further, the elastic locking members 6 and 6 (only one of them is shown because it has a substantially symmetrical structure) will be described in detail with reference to FIG. Each elastic locking member 6 is made of a plate-like body such as stainless steel or molybdenum (Mo) or a linear body, in which a flat body is cut into a strip shape, and extends in the same direction as the support wires 31 and 31 when viewed from the front. A flat plate-like fixing portion 61 that is connected and fixed to the support wires 31 and 31 by means of welding, and the first ( The second (other) bent portion is bent into a substantially square shape lower than the first (one) bent portion 62 formed through the first bent portion 62 and the flat plate portion 63 following the bent portion 62. It is comprised from the part 64 and the other end part 65 which makes | forms a free end. The outer surfaces of the top portions of the first (one) and second (other) bent portions 62, 64 are semicircular curved surfaces. Further, the intermediate flat plate portion 63 is not essential.

  The dimensional relationship between the first (one) and second (other) bent portions 62 and 64 of the elastic locking member 6 and the inner diameter of the outer tube 1 before the stem 2 is inserted into the outer tube valve 1 is shown in FIG. As shown, the distance between the top outer surfaces of the first (one) bent portions 62, 62 of the chevron is B, the distance between the top outer surfaces of the second (other) bent portions 64, 64 of the chevron is N, and the outer tube When the inner diameter of the neck portion 13 of the valve 1 is D, these three members are inserted into the outer tube valve 1 in either case N> D <B or D <N <B or D <B <N. After that, B has a relationship of less than the maximum inner diameter of the bulging portion 11).

  The relationship between the three after the stem 2 is inserted into the outer tube valve 1 is D = N <B. That is, the elastic locking members 6, 6 are fixed to the side portions of the pair of support wires 31, 31 facing the outer tube valve 1, and the top of the first (one) bent portion 62 is the outer tube valve 1. It faces the bulging portion 11 and the top of the second (other) bent portion 64 elastically contacts the inner wall surface of the neck portion 13.

  In the above, the flat plate portion 63 and the other end portion 65 forming the free end of the elastic locking member 6 may be in contact with the support wire 31 or separated as shown in FIG. Thereafter, the top outer surface of the second (other) bent portion 64 of the chevron is pressed against the inner wall surface of the neck 13, so that the flat plate portion 63 and the other end portion 65 are warped and press the support wire 31. Further, the other end portion 65 may be at the top of the bent portion 64 or in the vicinity thereof, or may be in contact with or close to the support wire 31 as illustrated.

  In the figure, reference numeral 8 denotes the starting auxiliary circuit unit 8 and the like, and a lighting tube (glow starter) 81, a bimetal switch 82, and a resistor 83 are connected in series between the lead-in wires 22 and 23, and the lighting tube 81 and the bimetal switch 82 Is connected to the auxiliary electrode 5s through a current limiting resistor or the like. Reference numerals 84 and 85 denote power supply members.

  The high-pressure discharge lamp shown in FIG. 1 is a double-pipe metal halide lamp L1 in which an arc tube 4 is accommodated in a BT type outer tube bulb 1, and a base up in a vertically or inclined state with the base 7 side facing upward. Lights on.

  That is, the metal halide lamp L1 is turned on by energizing the lamp L1 from a power source through a lighting circuit device (not shown) having a ballast and the like. The lamp L1 has an introduction conductor 22 and 23 electrically connected to a terminal portion (shell and eyelet) of the base 7 at the time of starting, a start auxiliary circuit portion 8 a support member 3 a power supply member 84 and 85, and an external introduction conductor 52. A voltage is applied to the coiled electrodes 5 and 5 and the auxiliary electrode 5s through the metal foils 53 and 54, etc.

  Then, discharge first occurs between one electrode 5 close to the upper side and the auxiliary electrode 5s, then shifts to discharge between the electrodes 5 and 5, and the lamp L1 emits light. When the discharge starts between the electrodes 5 and 5, the starting circuit unit 8 including the lighting tube (glow starter) 81 and the bimetal switch 82 is operated to cut off the circuit, or the voltage is lowered by the resistor so that the electrode 5 Then, the discharge between the electrode 5 and the auxiliary electrode 5 s close to the electrode 5 is stopped, and thereafter stable lighting can be maintained by the discharge between the electrodes 5 and 5.

  Then, according to the metal halide lamp L1 of the present embodiment, breakage separation occurs due to scratches or distortions in the sealed portion or the neck portion 13 where the mechanical strength of the glass outer tube bulb 1 is the weakest. However, the valve 1 can be prevented from falling on the floor surface.

  That is, even when the outer tube valve 1 is broken at the sealing portion or the neck portion 13 and separated from the sealing portion side, the second (other) chevron is bent on the inner wall surface of the neck portion 13. The top portions of the portions 64 and 64 are elastically contacted to support the valve 1, and even if it begins to drop, the shoulder portion gradually reduced in diameter from the bulging portion 11 of the valve 1 to the neck portion 13 (E) is hooked and locked to an inclined portion (F) from the top of the protruding first (one) chevron-shaped bent portion 62 located at a larger interval than the inner diameter of the neck portion 13 toward the flat plate portion 63; It is possible to prevent the outer tube valve 1 from being locked at two locations by one elastic locking member 6 and further falling. Moreover, it can capture | acquire in the short space | interval H from the said E part to F part, while acceleration is not added to the falling outer tube | bulb valve 5 so much.

  Further, the distance from the opening of the outer tube valve 1 to the shoulder E of the neck portion 13 is longer than the dimension between the top of the bent portion 62 and the top of the bent portion 64 of the elastic locking member 6.

  For this reason, when the stem 2 provided with the elastic locking member 6 having spring properties is inserted into the valve 1, the outer surface side of the tops of the two bent portions 62 and 64 extending from the fixing portion 61 is the inner wall surface of the neck portion 13. The flat plate portion 63 and the free end 65 move along the support lines 31 and 31 while being deformed and inserted into a flat shape while rubbing.

  When the stem 2 is further inserted and the first (one) bent portion 62 passes through the neck portion 13 and enters the bulged portion 11, the bent portion 64 is released from the contact with the inner wall surface of the neck portion 13. The distance B between the tops of the bent portions 62 and 62 becomes larger than the inner diameter D of the neck portion 13, but the subsequent second (other) bent portion 64 is compressed between the neck portion 13. The top is always in elastic contact with the inner wall surface of the neck 13.

  That is, the movement of the first (one) bent portion 62 toward the outer tube valve 1 side is restricted by the fixing portion 61 and the second (other) bent portion 64 when entering the bulging portion 11. . For this reason, the fixed portion 61 and the second (other) bent portion 64 receive the repulsion when the pressure on the first (one) bent portion 62 is released, and a part of the elastic locking member 6 is It is possible to suppress hitting the outer tube valve 1 by the reaction. Therefore, the damage | wound given to coatings, such as a light-diffusion film | membrane and a reflecting film apply | coated and formed on the inner wall surface of the bulging part 11 and this inner wall surface, can be suppressed.

Further, at the time of this insertion, by making the tops of the bent portions 62 and 64 inserted into contact with the inner wall surface of the neck portion 13 while being rubbed into curved surfaces, there is little resistance and the inner wall surface of the neck portion 13 is not damaged. Further, even if a coating such as a light diffusion film or a reflection film is formed, these coatings are scratched or even if they are scratched, the appearance quality of the lamp L1 is not greatly impaired.

  Therefore, in the lamp that is lit with the base up, it is possible to prevent the outer bulb 1 separated from the sealing portion, the neck portion 13 and the like from dropping off to the floor surface or the like, and to damage people or goods below. Thus, the metal halide lamp L1 with improved safety can be provided.

  In addition to the shape shown in FIGS. 1 and 2, the elastic locking member 6 can be configured as shown in FIG. 4. In FIG. Description is omitted.

  The elastic locking member 6 used in the discharge lamp L2 shown in FIG. 4 includes a flat plate-like fixing portion 61 that extends in the same direction as the support member 3 and is connected and fixed to the support wire 31 by means such as welding. The first (one) mountain-shaped bent part 62 having a substantially semicircular shape that forms a spring action following the fixed part 61, and lower than the first (one) mountain-shaped bent part 62 formed following the bent part 62. The second (other) bent portion 64 is bent into a substantially semicircular mountain shape, and the other end portion 65 is a free end. Further, the intermediate flat plate portion 63 is not essential.

  The pair of elastic locking members 6 and 6 have substantially the same dimensional relationship in the neck portion 13 and the bulging portion 11 as in the above embodiment, and have the same effects as the elastic locking members 6 and 6 described above. Present.

  In the above embodiments, the two bent portions 62 and 64 have the same shape. However, the two bent portions 62 and 64 are not limited to the same shape. For example, the substantially bent and semicircular bent portions 62 and 64 have the same shape. Each one may be formed.

  Furthermore, in the embodiment shown in FIGS. 1 to 4 described above, the attachment of the elastic locking members 6 and 6 to the support member 3 is not limited to this, although the fixing portion 61 is provided on the bulging portion side of the valve 1. The neck portion 13 may have a fixing portion 61.

  In addition, since this fixing | fixed part 61 inserts the stem 2 from the opening part of the outer tube | pipe valve 1, it is better to work on the side of the bulging part 11 inserted previously.

  Specific examples of high pressure metal vapor discharge lamps are described below.

  The lamp is a metal halide lamp with a rated lamp power of 400 W, and the main configuration of the lamp is as follows.

  The lamp is a BT type outer tube bulb 1 having a total length (outer tube bulb + base) of about 290 mm and a maximum outer diameter (bulge portion) of about 116 mm, and a stem sealed at the end of the outer tube bulb 1 A support member 3 formed in the shape of a long rectangular frame having a length of about 220 mm and a width of about 40 mm with a support wire 31 made of stainless steel provided in 2, and electrodes are provided inside both ends fixedly supported by the support member 3. An arc tube 4 made of quartz glass having a total length of about 130 mm and an outer diameter of about 33 mm, in which a halide made of Sc-Na-I, mercury (Hg) and argon (Ar) gas are enclosed, and the above support A stainless steel plate having a plate thickness of about 0.25 mm, a width of about 4 mm, and a developed length of about 130 mm connected to the side surfaces of the support wires 31 and 31 on the left and right sides of the member 3 is used. The length of the free end) 65 is about 10 mm each, the height of the first (one) angled bent portion 62 (located in the valve bulging portion 11) is about 15 mm, the skirt width is about 51 mm, and the second ( On the other hand, it is composed of elastic locking members 6 and 6 which are bent and formed into a substantially W shape with a height of the angled bent portion 64 (abutting against the inner wall surface of the valve neck portion 13) of about 10 mm and a skirt width of about 34 mm. Has been.

  The outer tube valve 1 has a mass of about 160 g (grams), but in the drop test, the valve 1 falling at a head H of about 20 mm could be captured.

  FIG. 5 is a partial cross-sectional front view showing an outline of an embodiment of an illumination device (apparatus) 9 equipped with the high-pressure metal vapor discharge lamp L1 described above.

  This illumination device (appliance) 9 is an embedded illumination device (appliance) 9 embedded in a ceiling 91 or the like, and has, for example, a device (appliance) main body 92 attached to the ceiling 91 side. The base 7 of the high-pressure metal vapor discharge lamp L1 is attached to a socket 93 provided in the main body 92. In addition, a reflection mirror 94 that reflects the emitted light of the lamp L1 downward is provided in the apparatus (equipment) main body 92.

  It is not necessary to provide a lamp protection cover member made of glass or the like covering the opening side of the reflecting mirror 94, but a light control body 95 such as a lens or filter for light distribution or light color adjustment is provided. May be.

  The high-pressure metal vapor discharge lamp L1 is electrically connected through a socket 93 to a lighting circuit device (not shown) having a ballast or the like separately provided in the device (equipment) main body 92 or outside the main body 92, The lamp L1 can be turned on by power supply from the lighting circuit device.

  Accordingly, the lighting device (apparatus) 9 according to the embodiment using the high-pressure metal vapor discharge lamp L1 prevents the outer tube bulb 1 from dropping even if it is separated from the sealing portion or the neck portion 13 for some reason. It is possible to provide a lighting device (instrument) 9 with improved safety.

  In the above embodiments, the definitions and technical meanings of terms are as follows unless otherwise specified.

Examples of the hermetic container material forming the arc tube of the high-pressure metal vapor discharge lamp include translucent high silica glass mainly composed of silicon oxide (SiO ₂ ) such as quartz glass or aluminum oxide (alumina-Al ₂ O ₃ ). These translucent ceramics can be used.

  Further, the arc tube container may be cylindrical, oval, spherical, or a composite shape thereof, and a discharge space may be formed between the opposing electrode structures inside.

  In the case of a glass container, the shape of the sealing part formed at the end of the arc tube is a crushing seal using a molding die, but the glass tube not using the molding die is shrunk and shrunk. It may be a shrinkage seal that has a diameter and is gathered around the glass and its cross section is formed in a substantially circular shape. A metal foil or wire such as molybdenum (Mo) is used as an airtight sealing member in the sealing portion. Can be sealed. In the case of a ceramic container, the introduction conductor such as niobium (Nb) inserted through the opening can be hermetically sealed using a ceramic compound.

  The arc tube may be a both-end sealed type in which sealing portions are provided at both ends of the container, or a single-end sealed type arc tube in which a sealing portion is provided at one end. Further, the present invention can be applied to an arc tube in which a sealing portion in which the electrode assembly is hermetically closed is formed.

  As the discharge medium sealed in the arc tube container, mercury, a halide of a luminescent metal, a rare gas, or the like is appropriately selected and used according to the application or characteristics.

  The electrode assembly is used as a sealing member located in a sealing portion with the container. In the case of a glass container, a foil or wire made of molybdenum (Mo) or tungsten (W) is used. In the case of a ceramic container, niobium (Nb) is used. ) Or tungsten (W) or the like, and one end of the sealing member is provided with an electrode through an internal introduction member or electrode shaft made of molybdenum (Mo) or tungsten (W), etc. An external introduction member made of molybdenum (Mo), tungsten (W), or the like is connected to the end side.

  As the material for forming the outer bulb, hard or semi-rigid glass such as quartz glass, borosilicate glass or aluminosilicate glass, or soft glass such as soda lime glass can be used. You can choose correspondingly. The shape is A-type, BT-type, G-type, PS-type, R-type, or the like, or a combination thereof, and a small-diameter neck portion is formed in connection with the large-diameter bulge portion. In addition, a flare stem, a button stem, or the like is sealed and closed at the end of the neck portion by burn-off sealing or abutting sealing.

  The inside of the outer tube valve is an inert gas or nitrogen gas atmosphere or a vacuum atmosphere. In other words, inert gas or nitrogen gas is enclosed in the outer tube bulb at a low pressure or in a vacuum atmosphere to prevent oxidation of the arc tube component, support member, and stem component that become high temperature during lighting, and The restart time can be shortened, and it is possible to prevent rupture when the outer tube valve is damaged.

  In addition, the bulging part of the valve shown in the present invention can be clearly seen in the G-type, R-type, and BT-type valves, but in the T-type and other valves, the continuous maximum diameter portion that forms a straight tube corresponds to this. And the part formed in the edge part which passed through the shoulder part diameter-reduced from this largest diameter part turns into a neck part.

  The support member is formed by forming a wire or plate such as molybdenum (Mo) or stainless steel into a substantially rectangular frame shape or a substantially U-shape, or formed of a conductor such as two or more lead wires. Both ends are fixedly supported, and serve as a support for the power supply member and the elastic locking member. In addition to the arc tube, the support member may be provided with a shroud (medium tube), a starting auxiliary circuit member, a buffer member, and the like.

  Further, the elastic locking member uses a wire rod or plate made of a material such as stainless steel or molybdenum (Mo) described in JIS G4313, for example, and protrudes in a substantially square shape or a substantially semicircular shape from the side when viewed from the side. It is formed by bending so that a mountain-shaped bent portion having springiness is formed at two locations, and one end side is connected and fixed to a support wire or the like constituting the support member by means such as welding. Further, it is preferable that the top surface of the mountain shape is a curved surface so that sliding with the inner wall surface of the valve is improved.

  The fixing portion of the elastic locking member may be on the top side or the neck portion side of the valve. In addition, the fixed portion and the intermediate portion are attached to or guided by the outer peripheral surface of the support wire or the like (the entire surface may not be in contact with each other, for example, may be in a line contact state). By forming a groove shape such as a bent portion or a bent portion that forms a part of the above, the connection work with the support line can be easily and firmly performed.

  The elastic locking member should be highly elastic in order to securely capture the falling valve. However, when the mount is inserted into the valve, the inner wall of the valve and the coating are not damaged. However, a weak elastic material is preferable. The strength and weakness of this elasticity have contradictory effects, but the selection can be made as appropriate in consideration of the size and shape of the elastic locking member, such as the weight of the valve, the shape of the inner surface, the presence or absence of the coating, and the thickness. Good.

  Further, the base provided to cover the sealing portion can be screwed (E) or the like, and is screwed or engaged with a groove or a recess molded or formed in the sealing portion via an adhesive. It may be mechanically bonded.

  The lighting device in the present invention includes a general lighting fixture, and the lighting device (appliance) may be provided with a reflecting mirror, a lens, a protective cover, etc. It can be used for lighting, factory lighting, road lighting, sports facility lighting, and the like.

  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 can be applied to a multi-tube discharge lamp such as a double tube in which an arc tube such as a high-pressure sodium lamp or a mercury lamp is sealed in a glass outer tube bulb.

  The elastic locking member is not limited to the structure shown in the embodiment of FIGS. 2 and 3 as long as a plurality of bent portions corresponding to the neck portion and the bulging portion of the valve are formed.

  Furthermore, the lighting device (apparatus) is not limited to the structure and application shown in the embodiment of FIG. 4 described above, but can be applied to an apparatus having a structure according to various uses and applications, and the lighting direction of the discharge lamp is also vertical. Of course, the present invention can be applied not only to a simple base-up but also to an apparatus (apparatus) that lights in an inclined state or a horizontal direction.

L1, L2; high pressure metal vapor discharge lamp (metal halide lamp),
DESCRIPTION OF SYMBOLS 1; Outer pipe | tube valve, 11; The bulging part, 13;
3; support member, 31; support line, 4; arc tube,
5; lead-in conductor; 6; elastic locking member; 62, 64;
7; base, 9; lighting device (equipment), 92; device (equipment) body,

Claims (4)

A glass outer tube valve connected to the bulging portion and having a neck portion having a smaller diameter than the bulging portion;
A support member at least partially disposed in parallel in the outer tube valve;
An arc tube fixedly supported and electrically connected to the support member along the outer tube bulb axis;
One end side is fixed to each side portion of the support members arranged in parallel, and two bent portions that extend in the same direction as the outer tube valve and project laterally are provided in the intermediate portion toward the other end side. A pair of elastic locking members formed so that the maximum distance between the opposing bent portions is larger than the minimum inner diameter portion of the neck portion and protrudes into the bulging portion, and the other bent portion elastically contacts the inner wall surface of the neck portion;
A base joined to the outer tube bulb and electrically connected to the arc tube;
A high-pressure metal vapor discharge lamp comprising:   When the inner diameter of the neck portion of the outer tube valve is D, the interval between the top outer surfaces of the bent portions located at the neck portion of the elastic locking member is N, and the interval between the outer top surfaces of the bent portions located within the bulging portion is B The dimensional relationship between the outer tube valve and the elastic locking member outside the outer tube valve is N> D <B (where B is less than the maximum inner diameter of the bulging portion). High pressure metal vapor discharge lamp.   When the inner diameter of the neck portion of the outer tube valve is D, the interval between the top outer surfaces of the bent portions located at the neck portion of the elastic locking member is N, and the interval between the outer top surfaces of the bent portions located within the bulging portion is B 2. The high-pressure metal vapor discharge lamp according to claim 1, wherein the dimensional relationship between the outer tube bulb and the elastic locking member is D = N <B (where B is less than the maximum inner diameter of the bulging portion). . An instrument body;
A high-pressure metal vapor discharge lamp according to any one of claims 1 to 3 disposed in the appliance body;
A lighting circuit device connected to the high pressure metal vapor discharge lamp;
The lighting fixture characterized by comprising.

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