JP2010056081A - High-pressure discharge lamp, and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-pressure discharge lamp having a simple structure for facilitating forming work, and in which an elastic-locking member having a function of preventing a glass outer bulb from falling is provided in a support member which supports an arc tube. <P>SOLUTION: The high-pressure discharge lamp L1 includes an arc tube 1; a pair of support members 41, 42 for supporting the arc tube 1; a glass outer bulb 5 which is provided continuously with a swelled portion 52, while having a neck portion 51 with a diameter smaller than that of the swelled portion 52; and a pair of elastic locking members 7, 7 one end sides of which are extended coaxially with a pair of the support members 41, 42 and fixed to the sides of the support members 41, 42 respectively, which have bent portions, disposed respectively in the swollen portions 52 with their intermediate parts projecting sideward, and which are provided so that the maximum interval between a pair of the bent portions becomes larger than the minimum inner diameter portion of the neck part 51. The lighting system using this lamp L1 is also provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high-pressure discharge lamp such as a metal halide lamp in which an arc tube is provided in an outer tube bulb via a support member, and an illumination device equipped with the discharge lamp.

  High-pressure discharge lamps, such as metal halide lamps, are widely used as lighting sources for stores, factories, halls, sports facilities, and the like as high-efficiency, light-color rendering light sources.

  This high-pressure discharge lamp uses a discharge tube and an arc tube sealed with a discharge medium such as a metal halide or a rare gas as a light source, a stem tube of a mount that supports the arc tube, a neck portion of a glass outer tube bulb, The outer tube bulb has an inert gas, nitrogen gas, or vacuum atmosphere to protect the arc tube, keep the temperature, and prevent oxidation of metal parts in the outer tube.

  By the way, in this rare metal halide lamp, the quartz glass of the arc tube container material reacts with the metal halide to reduce its strength and break the arc tube at the end of its life. There was a risk that the outer pipe valve could be damaged and scattered by collision.

  Therefore, as a countermeasure, measures such as enclosing the arc tube with a heat-resistant and translucent glass tube (middle tube) and disposing it in the outer tube bulb are effective.

  In addition, this type of high-pressure discharge lamp is rare even when the base is attached to the socket of the lighting device or when the lamp is lit, and the seal portion between the stem tube of the mount and the bulb neck of the outer tube or the vicinity of this seal portion. In some cases, cracks such as cracks occurred.

  This is because the heating burner and strain relief burner during the sealing work between the outer tube valve and the stem tube of the mount, and when the sealing part is molded, the sealing part and the glass near the sealing part are uniform. The thickness of the wall does not shrink or bulge with a thick wall, resulting in thick or thin parts, progress of minute scratches or cracks, residual strain strength after processing, or partial strain differences increase, or external introduction derived from valves This is caused by a distortion or the like generated during spot-like heating in which a wire and a base are connected using a brazing material such as solder.

  That is, when mounting an E (screw-in) base while screwing it into a socket, a strong twisting force is applied to the sealing part of the outer tube bulb or the neck part in the vicinity, and thermal shock or vibration shock due to lamp flashing is thin. In some cases, cracks or cracks may occur when acting on a portion, a minute scratch or crack, or a portion having a large amount of strain.

Therefore, in a double-tube tube such as the above-mentioned high-pressure discharge lamp, even if the outer bulb is damaged or dropped at the sealing part or the neck part near this sealing part due to scratches or distortion, light emission occurs. It is known that a drop prevention stopper (fall prevention clasp) is provided on the lead member of the mount that supports the tube to prevent the valve from falling off. (Patent Documents 1 and 2)

JP 2002-184359 A JP 2008-66222 A

  The valve drop prevention stoppers (fall prevention clasps) shown in Patent Documents 1 and 2 are orthogonal to or obliquely intersect the tube axis with the lead member of the tube mount that is lit with the base side upward (base up). One or a plurality of lead members of a single bulb, the tip of which is provided in the bulging portion of the outer tube valve. Although it is not in contact with the inner wall surface of the valve, if the neck part breaks and begins to drop off, the arm (clasp) will come into contact with the inner wall at the part where the diameter gradually decreases from the bulging part to the neck part Hook the valve you are trying to prevent it from falling.

  The specific structure of the valve drop prevention stopper (fall prevention clasp) is such that the arm (clasp) can be rotated according to gravity up to a maximum of about 110 degrees on the top side of the valve with the lead member axis as a starting point. Is.

  The completed tube is turned on vertically or obliquely with the base side upward (base up). At this time, the arm (clasp) extends in a direction substantially perpendicular to the lead member axis (tube axis) due to gravity. Can be left.

  In the case of using such an arm (clasp) to prevent the valve from dropping, a desired effect can be obtained if the arm (clasp) is opened at a predetermined angle.

  However, in the case where the arm (clasp) is turned by its own weight, the arm (clasp) when the mandrel or protrusion, which is the swivel part, does not move smoothly due to flash or the impact or vibration is applied to the tube. ) Is in a raised position, and the tip portion does not reach the inner wall surface of the neck portion, so that the neck portion can be easily passed through and the valve may be dropped. In addition, there was a particular concern when the lamp was lit obliquely in one arm.

  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 bulb on a support member that supports an arc tube. It is another object of the present invention to provide a high-pressure discharge lamp capable of improving productivity and a lighting device using the discharge lamp.

  The high-pressure discharge lamp according to claim 1 of the present invention includes an arc tube; a pair of support members that support the arc tube; a stem to which the support member is attached; A glass outer tube valve having a neck portion having a smaller diameter than the protruding portion and having the stem sealed at the end portion of the neck portion; extending in the same direction as the pair of support members and having one end portion on the side of the support member Each of which has a bent portion that is fixed to each of the portions and has an intermediate portion protruding laterally and disposed at the bulging portion, and the maximum distance between the pair of bent portions is larger than the minimum inner diameter portion of the neck portion. A pair of elastic locking members provided; and a base that is joined to the sealing portion and electrically connected to the arc tube.

  Residual distortion, scratches, thin-walled parts, etc. may occur due to thermal processing in the vicinity of the sealing part with the stem formed by heat melting and reducing the diameter of the neck part of the glass outer tube bulb end. As a result, the valve may be damaged by a crack generated as described above and fall off the base.

  However, the present invention is provided with a pair of elastic locking members on the side portions of a pair of opposing support members. The portion of the valve that is gradually reduced in diameter from the bulging portion of the valve to the neck portion is hooked and locked, and further prevents the valve from falling.

  In addition, when the protruding tip of the elastic locking member on the opposite side of the fixed portion receives pressure from the valve, when the member contracts, the repulsive force increases and strong elasticity is obtained. The valve can be locked with (spring property).

  The angle lock member has a spring property, and when the mount is inserted into the outer tube valve, the outer surface side of the bent portion of the lock member is pressed against the inner wall surface of the neck portion, and is opposite to the fixed portion. When the free end extends along the support member and the bent portion passes through the neck portion and enters the bulging portion and is released from the pressure, the free end is restored and the interval between the bent portions is larger than the inner diameter of the neck portion.

  In addition, by setting the outer surface side apex of the bent portion that contacts the inner wall surface of the neck portion of the mount inserted into the outer tube bulb as a smooth surface such as a curved surface, the inner wall surface of the valve, the formed light diffusion film, reflection film, etc. The film is less likely to be scratched.

  In the present invention and the following invention, the material of the glass outer bulb is determined according to the type and temperature at the time of lighting, but quartz glass, borosilicate glass, aluminosilicate glass or soda lime glass is used, The shape is A-type, G-type, R-type, T-type, PS-type, BT-type, etc., or a combination of these. Flare stems and button stems can be burned off or abutted on the neck at the end. Some are sealed.

  In addition, the bulging portion of the valve referred to in the present invention can be clearly seen in a valve of G type, R type, BT type, etc., but in a valve of T type etc., the continuous maximum diameter portion forming a straight tube corresponds to this. And the sealing formation part by which this largest diameter part is diameter-reduced gradually becomes a neck part.

  In addition, the support member is formed by forming a wire or plate such as molybdenum (Mo) or stainless steel into a substantially long rectangular frame shape or a substantially U-shaped shape, so that both ends of the arc tube are fixedly supported and also acts as a power supply member. Make. In addition to the arc tube, the support member may be provided with a shroud (medium tube), a starting circuit, a buffer member, and the like, and the support member may be formed of two or more lead wires.

  In addition, the elastic locking member uses a wire 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 in the middle as viewed from the side. It is formed by bending so as to form a mountain-shaped bent portion with springiness, and one end side is connected and fixed to a support wire or the like constituting the support member by means such as welding.

  The position of the elastic locking member is preferably close to the contact portion with the bulb, but may be near the arc tube such as a shroud (medium tube), and the fixed side is the neck side or the top side of the bulb. It may be. Further, the fixing portion forms a part such as a cylindrical shape or a rectangular tube shape so as to follow the outer peripheral surface of the support line or the like (not necessarily the entire surface may be in contact, for example, a line contact state). By providing the bent portion or the bent portion, 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, a screw groove or the like that covers the sealing portion and the base is screwed or engaged via an adhesive is molded in advance and mechanically joined.

  The outer tube glass bulb contains an arc tube inside, and may contain a support member and a lighting circuit component that support the arc tube, and a shroud (medium tube) made of a heat-resistant translucent material around the arc tube. ) Etc.

  The material of the translucent airtight container constituting the arc tube accommodated therein is not limited to glass but may be made of ceramics such as alumina having high heat resistance.

  The base is not limited to the E (screw-in) type, but may be an S (insertion) type. Also, a base having an adapter portion that accommodates and joins a sealing portion and a neck portion of a valve formed of an electrically insulating material such as a metal or ceramic provided integrally or integrally with a shell portion. Also good.

  Furthermore, the high-pressure discharge lamp can be applied to a metal halide lamp, a high-pressure sodium lamp, a mercury lamp, or the like to prevent the outer bulb from dropping off from the base.

  According to a second aspect of the present invention, there is provided a high pressure discharge lamp according to a second aspect of the present invention, wherein the bent portion protrudes laterally from the middle portion of the elastic locking member, and the bent portion is on a virtual extension along the tube axis of the outer bulb. The distance from the inner wall of the valve in the neck portion direction is 20 mm or less.

  The position of the elastic locking member fixed to the support member is preferably as close as possible to the neck portion of the valve, and the falling valve is located near the bent portion while the fall interval (distance) H with a small acceleration is 20 mm or less. If it is made to catch, the impact (force) applied to both is small, and it can control that a valve breaks. Further, since the acceleration increases as the interval increases, it is necessary to select a material that can withstand this, and there is a risk of increasing the cost.

  The valve falls with a slight inclination with the opening side upward, but the drop interval H in the present invention is a distance in a vertical state along the valve axis.

  The high-pressure discharge lamp according to claim 3 of the present invention is characterized in that a free end of the other end portion on the opposite side of the fixed portion of the elastic locking member is separated from the support member.

  The free end on the opposite side of the fixed part that sandwiches the bent part of the elastic locking member is a hollow part in the outer pipe valve that is not in contact with other members, preferably a part where the inner diameter of the outer pipe valve is larger than the minimum inner diameter part of the neck part It is possible to lock the reduced diameter portion of the valve that is separated and dropped at the free end. Further, it is possible to form a fold or the like that can easily lock the reduced diameter portion of the valve at the tip of the free end.

  According to a fourth aspect of the present invention, there is provided an illuminating device comprising: an illuminating device main body; and the high-pressure discharge lamp according to any one of the first to third aspects disposed in the illuminating device main body. Features.

  This lighting device may be provided with a lighting circuit device in the main body, or may be provided with a lighting circuit device outside the main body and connected to a discharge lamp. Further, a reflecting mirror or a light-transmitting cover member may be provided on the light emitting side in the main body.

  According to the first aspect of the present invention, even if the valve is damaged and is likely to fall due to scratches or distortion at the portion from the sealing portion to the neck portion, the elastic locking member hooks the valve and prevents its falling off. It is possible to provide a high-pressure discharge lamp with improved safety that does not harm people or goods.

  According to the second aspect of the present invention, the falling valve is captured while the falling distance is small, so that the locking member is configured with a low elastic force to surely prevent the falling and the coating formed on the inner surface of the valve It is possible to provide a high-pressure discharge lamp with improved quality and safety such that no scratches are generated.

  According to the third aspect of the present invention, the reduced diameter portion of the valve that separates and falls on the free end side can be easily locked.

  According to invention of Claim 4, since the high pressure discharge lamp which has an effect as described in any one of Claim 1 thru | or 3 is provided, the illuminating device (equipment) which can prevent the accident by fall of a valve | bulb is provided. can do.

  In addition, this illuminating device (equipment) can be used for illumination of a store, a hall, an underground mall, an office, a sports facility, and the like.

It is a front view which shows the outline of a metal halide lamp, for example as a high pressure discharge lamp which concerns on embodiment of this invention. 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. (A) is an enlarged front view schematically showing another elastic locking member used in the high-pressure discharge lamp of the present invention and its vicinity, and (b) is a perspective view of the elastic locking member. The figure is an enlarged front view showing an outline of another elastic locking member used in the high-pressure discharge lamp of the present invention and the vicinity thereof. (A) is an enlarged front view showing an outline of another elastic locking member used in the high-pressure discharge lamp of the present invention, and (b) is a top view of the elastic locking member. It is a front view which shows the outline of the other high pressure discharge lamp which concerns on embodiment of this invention. It is a front view which shows the outline of the lighting fixture for high ceilings for sports facilities illumination etc. which mounted | wore with the said metal halide lamp which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention 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 discharge lamp according to the present invention, and FIG. 2 is an enlarged front view showing an outline in the vicinity of one elastic locking member which is a main part in FIG.

  In the figure, reference numeral 1 denotes an arc tube as a light source, 3 denotes a mount that supports the arc tube 1 and supplies power to the arc tube 1, 5 denotes a glass outer tube bulb that encloses the mount 3, and 6 denotes this An E (screw-in) type base joined to the end of the bulb 5 is used as a main member to constitute a metal halide lamp L1.

  The arc tube 1 is a light-transmitting hermetic container made of quartz glass, ceramics, or the like. Here, the thickness made of quartz glass is about 1.0 mm to 2.0 mm, and the inner diameter is about 10 to 20 mm. A straight tube (T) -shaped container 11 having an interval between inner end portions in the longitudinal direction of about 25 to 60 mm is used, and crushing sealing portions 12 and 13 are formed at both ends of the container 11. A pair of metal foils 21 and 22 made of ribbon-like molybdenum (Mo) are sealed in the crushing sealing portion 12, and a metal foil 21 is hermetically sealed in the other crushing sealing portion 13.

  Further, an inner lead member having discharge electrodes 2a, 2a, 2b made of tungsten (W) or the like is provided on the inner side of each metal foil 21, 21, 22 and a molybdenum (Mo) wire or the like is provided on the outer side of the container 11. The external lead members 23, 23, and 24 are connected by means such as welding and caulking. The tips of the discharge electrodes 2a and 2a are opposed to each other as a main electrode with an interval of 15 to 45 mm, and the discharge electrode 2b is arranged in the vicinity of one discharge electrode 2a as an auxiliary electrode.

  The arc tube vessel 11 is filled with a predetermined amount of mercury, metal halide, and 5 kPa to 20 kPa argon (Ar) gas as light emission and discharge media.

  Argon (Ar) gas is suitable as the rare gas, but other rare gas such as neon (Ne) having a partial pressure ratio of 10% or less, preferably 5% or less may be mixed therein. Examples of the metal halide include halogens such as iodine (I), bromine (Br), and chlorine (Cl), sodium (Na), scandium (Sc), cesium (Cs), dysprosium (Dy), and the like. And at least one kind of luminescent metal is enclosed to improve characteristics such as luminous efficiency, color rendering and color temperature.

  The mount 3 includes a stem 31 in which a pair of lead-in wires 32 and 33 are hermetically sealed, and a wire or plate such as molybdenum (Mo) or stainless steel connected to the one lead-in wire 32 by means such as welding. A pair of support members 41, 42 formed into a long rectangular frame shape, here a wire, and the support wires 41, 42 are fixed by supporting the crushing sealing portions 12, 13 at both ends of the arc tube 1 from both sides. A pair of band-shaped members 43, 43, fixing members 44, 44 having a ring shape fixed to the band-shaped members 43, 43 or the support wires 41, 42 via attachment pieces (not shown), The upper and lower end surface portions are supported by the fixing members 44 and 44, and a shroud (medium tube) 45 made of a transparent quartz glass tube disposed so as to surround the arc tube 1 and the discharge current acting as an auxiliary electrode. 2b, a starting circuit unit 46 including a resistor, a bimetal, or other thermal responsive switch connected between the external lead member 24 and the support wire 41, and the external lead member 23 of the discharge electrode 2a acting as a main electrode. A power supply member 47 interposed between the lead wire 49 connected to the wire 32, a power supply member 48 connected between the external lead member 23 of the discharge electrode 2a acting as the main electrode and the support wire 41, A pair of elastic locking members 7 and 7 whose one ends are connected to the outer surface portions of the support wires 41 and 42 are configured as main components.

  Further, the elastic locking members 7 and 7 (only one is shown because it has a substantially symmetrical structure) will be described in detail with reference to FIG. Each of the elastic locking members 7 and 7 is made of a plate-like body such as stainless steel or molybdenum (Mo) or a linear body, or a flat plate-like body cut in a band shape, and is coaxial with the support wires 41 and 42 when viewed from the front. A flat plate-like fixing portion 71 that extends and is fixedly connected to the support wires 41 and 42 by means such as welding, and a substantially semicircular mountain-shaped bent portion 72 that has a spring action following the fixing portion 71, and , And the other end 73 formed as a free end following the bent portion 72.

  The elastic locking member 7 fixed to the symmetric side portions of the opposing support lines 41 and 42 warps in the valve 5 direction in which the free end 73 repels the support lines 41 and 42 side in the bulging portion 52. The angle S between the apexes of the outer surfaces of the angled bent portions 72, 72 is larger than the inner diameter D of the neck portion 51 of the outer tube glass bulb 5, so that the bent portion 72 extends from the inner diameter portion of the neck portion 51 to the bulb. It lies outside the virtual extension line YY that runs substantially parallel to the five axes. In addition, the distance H between the portion B of the bulb 5 that is reduced in diameter and substantially parallel to the bulb 5 axis and the portion C that points from the bent portion 72 of the elastic locking member 7 to the fixed portion 71 is about 16 mm. is there.

The outer tube valve 5 is made of translucent hard glass such as borosilicate glass having a total length of about 260 mm, and has a bulging portion 52 having a maximum outer diameter of about 116 mm at the center and is closed on the lower side in the figure. Further, it has a so-called BT shape having a top portion 53 and a small-diameter neck portion 51 having an outer diameter of about 50 mm. The neck portion 51 has a sealing portion (not shown) in which a flare portion (not shown) of the stem 31 is sealed, and an exhaust pipe (not shown) provided on the stem 31 after sealing. ), The inside of the outer tube valve 5 is evacuated, and an inert gas such as argon (Ar), nitrogen (N ₂ ) gas, or the like is enclosed or vacuumed.

  In addition, a shell portion 61 of an E39 (screw-in) type base 6 is joined to the sealing portion via a heat-resistant adhesive so as to cover the sealing portion, or in a spiral thread groove formed by a mold. The shell part 61 of the die 6 is attached by screwing.

  The high-pressure discharge lamp shown in FIG. 1 is a double-pipe metal halide lamp L1 in which the arc tube 1 is housed in a BT type outer tube bulb 5, and the base up in a vertically or inclined state with the base 6 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 lead wires 32 and 33, support members 41 and 42, power supply members 47 and 48, power supply members 47 and 48, lead wires 49, and external leads electrically connected to the terminal portions (shell 61 and eyelet 63) of the base 6 at the time of starting. A voltage is applied to the main electrodes 2a and 2a and the auxiliary electrode 2b through the members 23 and 24, the metal foils 21 and 22, and the like.

  Then, the discharge first occurs between one main electrode 2a and the auxiliary electrode 2b that are close to each other, and then shifts to a discharge between the main electrodes 2a and 2a, and the lamp L1 emits light. When the discharge starts between the main electrodes 2a, 2a, the starting circuit unit 46 composed of a resistor, a heat responsive switch, etc. operates the heat responsive switch to shut off the circuit, or the voltage is lowered by the resistor and the main electrode 2 The discharge between 2a and the auxiliary electrode 2b adjacent to the main electrode 2a can be stopped, and thereafter stable lighting can be maintained by the discharge between the main electrodes 2a and 2a.

  And according to the metal halide lamp L1 of the present embodiment, the bulb is broken and separated due to scratches or distortions in the sealed portion where the outer tube glass bulb 5 has the weakest mechanical strength or the portion on the neck portion 51. However, the valve 5 can be prevented from falling on the floor surface.

  That is, even when the outer tube valve 5 is broken at the sealing portion or the neck portion 51 and separated from the base 6 side, the bulging portion 52 of the valve 5 that has started to drop gradually approaches the neck portion 51. A portion (point B) that is reduced in diameter to a portion (point C) that extends from the bent portion 72 of the pair of elastic locking members 7 and 7 that is spaced apart from the inner diameter of the neck portion 51 to the fixing portion 71 (point C). It is hooked and locked, and further prevented from falling. Further, since the distance H from the point C to the point B is about 16 mm, the falling valve 5 can be captured before much acceleration is applied.

  This is because each elastic locking member 7 has a spring property, and when the mount 3 is inserted into the valve 5, the outer surface side of the apex of the bent portion 72 abuts against the inner wall surface of the neck portion 51 and is pressed (compressed). The free end 73 opposite to the fixed portion 71 extends along the lead wires 41 and 42, and the angled bent portion 72 passes through the neck portion 51 and enters the bulging portion 52. This is because when the contact (pressing) is released, it is restored and the distance S between the bent portions 72 and 72 apexes becomes larger than the inner diameter D of the neck portion 51.

  In addition, since the bent portion 72 inserted while abutting and rubbing against the inner wall surface of the neck portion 51 is a semicircular apex portion during the insertion as described above, there is little resistance, and the inner wall surface of the neck portion 51 may be damaged. In addition, even if a film such as a light diffusion film or a reflection film is formed, these films are scratched, and even if they are scratched, the appearance quality of the lamp L1 is not greatly impaired.

  Therefore, it is possible to prevent the bulb 5 separated from the base 6 from dropping off to the floor surface and the like, and to provide a metal halide lamp L1 with improved safety without damaging a person or an article below. Can do.

  The rupture of the arc tube 1 inside the outer tube glass bulb 5 can be dealt with by a shroud (middle tube) 45 surrounding the arc tube 1, and the outer tube glass bulb is ruptured by the rupture of the arc tube 1. Even if a crack or the like occurs in the neck portion of the outer tube glass 5, it is possible to prevent the outer tube glass bulb 5 from falling off.

  The elastic locking member 7 of the present invention may have a shape as shown in FIGS. 3 to 5 in addition to the shape shown in FIG. In the figure, the same parts as those in FIG.

  The elastic locking member 7 shown in FIG. 3 includes a flat plate-like fixing portion 71 that extends coaxially with the support members 41 and 42 and is connected and fixed to the support wires 41 and 42 by means such as welding. 71 is composed of a substantially bent-shaped bent portion 72 having a substantially square shape that forms a spring action, and an other end portion 73 that is formed following the bent portion 72 and forms a free end.

  The pair of elastic locking members 7 also have a relationship between the distance (S) between the apexes of the outer surfaces of the mountain-shaped bent portions 72 and 72 and the inner diameter (D) of the neck portion 51 and the elastic locking. The distance H between the portions where the member 7 and the valve 5 are in contact with each other is substantially the same as that in the above embodiment, and the same effect as the elastic locking member 7 described above is exhibited.

  For example, this elastic locking member 7 uses a stainless steel plate having a plate thickness of about 0.25 mm, a developed length of about 40 mm, and a width of about 4 mm, and about 60 degrees to the left and right at about 10 mm from the end portion. It is bent into a chevron with a curved surface (R2 mm) having a small frictional resistance at the top at an angle of 120 degrees, and the fixed part 71 is folded back about 140 degrees, leaving about 10 mm in length. In the figure, reference numeral 74 denotes a tongue piece that stands up about 90 degrees from the fixing portion 71.

  In the elastic locking member 7 shown in FIG. 3, the free end 73 side of the other end opposite to the fixing portion 71 is not in contact with the support members 41 and 42. That is, it exists in the hollow part inside the outer pipe | tube valve | bulb 5, and the diameter reduction part of the valve | bulb 5 which isolate | separates and falls on this free end 73 side can be latched.

  Further, by making the extension length of the fixing portion 71 and the bending portion 72 longer than the extension length of the bending portion 72 and the distal end portion of the free end 73, the contact portion ( When the drop dimensions up to the point C) are the same, the rising angle from the fixed portion 71 can be reduced, the elasticity (spring property) can be reduced (of course, the elastic force can be used to lock the separated valve 5). ) When the mount is inserted into the bulb 5, it is possible to prevent the elastic locking member 7 from scratching the inner wall surface of the bulb neck and the coating such as the light diffusion film or the reflection film.

  2 and 3, when the member 7 contracts when the protruding tip 73 on the opposite side of the fixing portion 71 of the elastic locking member 7 receives pressure from the valve 5, the support members 41 and 42 are contacted. By making contact, the valve 5 can be locked with increased resilience and strong elasticity (springiness).

  Further, the tongue piece 74 formed on the fixing portion 71 in FIG. 3 secures directivity when the elastic locking member 7 is fixed to the support members 41, 42, etc. It is possible to improve workability and connection strength, such as by welding. The shape of the tongue piece 74 is not limited to a part (two pieces) of a rectangular tube shape, and may be a semi-cylindrical shape similar to the outer shape of the support members 41 and 42.

  The elastic locking member 7 shown in FIG. 4 includes a flat plate-like fixing portion 71 that extends coaxially with the support members 41 and 42 and is connected and fixed to the support wires 41 and 42 by means such as welding. 71 is composed of a substantially bend-shaped bent portion 72 having a substantially square shape that forms a spring action, and another end portion 73 that is formed following the bent portion 72 and forms a free end. The other end portion 73 is a support. The members 41 and 42 extend substantially in parallel with each other and are in contact with each other.

  The pair of elastic locking members 7 also have a relationship between the distance (S) between the apexes of the outer surfaces of the mountain-shaped bent portions 72 and 72 and the inner diameter (D) of the neck portion 51 and the elastic locking. The distance H between the portions where the member 7 and the valve 5 are in contact with each other is substantially the same as that in the above embodiment, and the same effect as the elastic locking member 7 described above is exhibited.

  For example, the elastic locking member 7 is made of a stainless steel plate having a plate thickness of about 0.25 mm, a developed length of about 50 mm, and a width of about 4 mm. Folded into a chevron with a curved surface (R2 mm) having a small frictional resistance, and the length of the fixed portion 71 and the other end portion 73 on the end side is about 5 mm, and the other end portion 73 is connected to the support members 41 and 42. It is in contact.

  In the elastic locking member 7 shown in FIG. 4, the free end 73 at the other end opposite to the fixed portion 71 is in contact with the support members 41 and 42, so that the mount is inserted into the valve 5. The elastic locking member 7 is hard to be compressed and is strongly pressed against the inner wall surface of the valve neck, the light diffusing film, the reflective film and the like, and is easily damaged. Can be captured.

  The elastic locking member 7 shown in FIG. 5 has substantially the same shape as that of FIG. 4, but a substantially U-shaped guide portion 75 is formed at the other end portion 73 forming the free end, and the support is provided in the guide portion 75. The members 41 and 42 are guided to prevent the free end 73 at the distal end of the elastic locking member 7 from being detached from the support members 41 and 42, and the elasticity (spring property) can be stabilized.

  FIG. 6 is a schematic front view showing another embodiment of the high-pressure discharge lamp L2 of the present invention. In FIG. 6, the same parts as those in FIG.

  FIG. 6 shows an arc tube 1 in which a ceramic such as alumina is used for a light-transmitting hermetic vessel 11, and a predetermined amount of mercury and metal halide are sealed in the vessel 11 as light emission and discharge media. A small metal halide lamp L2 is configured by being supported by a stem tube 31 via a support member 3 and the stem tube 31 being sealed with a glass outer tube bulb 5 having a T shape (straight tube shape). Further, the elastic locking member 7 shown in FIG. 2 is connected and fixed to the support wires 41 and 42 in the outer bulb 5 of the lamp L2 by means such as welding. In the case of FIG. 3, the fixing portion 71 of the elastic locking member 7 is on the top side of the valve 5.

  In the lamp L2, the straight tubular portion serves as the bulging portion 52, and the sealing formation portion with the stem tube 31 gradually reduced in diameter by sealing the end portion serves as the neck portion 51. Even if a crack is generated in the vicinity of the seal forming portion and the valve 5 is separated and dropped from the base 6, the gradually reduced diameter of the seal forming portion is formed at the portion from the angled bent portions 72, 72 to the free end 73. The valve 5 can be prevented from dropping further when it is caught.

  Also in the case of this metal halide lamp L2, the same effect as the lamp LI of the above embodiment is exhibited.

  FIG. 7 is a front view showing an outline of an embodiment of a lighting device 9 for a high ceiling such as for sports facility lighting equipped with the high-pressure discharge lamp L1 according to the present invention.

  In FIG. 7, the luminaire 9 has a socket 92 attached to a base 91 that forms a mounting portion on a ceiling surface and the like, and a guard 93 is provided surrounding the socket 92. A reflection shade 94 having a conical shape made of a metal plate or enamel and having a reflection surface formed on the inner surface is fixed to the lower end of the guard 93, and the base 3 of the discharge lamp L1 is attached to the socket 92. Holding and electrical connection is made.

  In this embodiment, the base 91, the guard 93, the reflective shade 94, and the like constitute an instrument body. Further, the lamp lighting circuit device and the power switch (both not shown) are provided in a place different from the instrument body.

  Such a lighting fixture 9 is attached to the ceiling surface of a sports facility with the opening side of the reflective shade 94 facing downward, and by turning on the power switch, the power source is switched to the discharge lamp L1 via the lighting circuit device and socket 92. Energized.

  When the lamp L1 in a vertical state with the base 6 side upward (base-up) is turned on in the reflecting shade 94, visible light from the lamp L1 is reflected by the reflecting surface or directly opens the opening. Through transmission, it is possible to obtain a predetermined illuminance by irradiating the coating or ground surface, which is an object to be irradiated.

  Therefore, the lighting fixture 9 according to the embodiment of the present invention using the high-pressure discharge lamp L1 can prevent the outer bulb 5 from being separated from the base 6 and can improve safety.

  The present invention is not limited to the above embodiment. For example, the high-pressure discharge lamp can be applied to a metal halide lamp, a high-pressure sodium lamp, a mercury lamp, and the like to achieve the above-described effects. The glass outer tube bulb is made of hard glass such as quartz glass, borosilicate glass or aluminosilicate glass, or soft glass such as soda lime glass. A PS type, a BT type, etc., or those formed in a composite shape thereof can be used.

  Further, the inside of the bulb that is the outer tube of the high-pressure discharge lamp has an airtight atmosphere such as an inert gas or nitrogen gas atmosphere or a vacuum atmosphere. In other words, inert gas or nitrogen gas is sealed in the outer tube bulb at a low pressure or in a vacuum atmosphere to prevent oxidation of the arc tube components, support members, and stem components that become hot during lighting, and to prevent the lamp from Restart time can be shortened.

The high pressure discharge lamp has a light emitting source sealed with at least a pair of hot and cold cathode discharge electrodes, and a starting circuit unit disposed in the outer bulb uses a lighting tube or a UV enhancer. May be used.

Further, the base is not limited to the E (screw-in) type, but may be an S (insertion) type. Also, a base having an adapter portion that accommodates and joins a sealing portion and a neck portion of a valve formed of an electrically insulating material such as metal or ceramics provided integrally or integrally with the shell portion. Also good.

  In addition, a shroud (middle tube) surrounding the arc tube is not essential, but a heat-resistant translucent material such as quartz glass, hard glass or ceramics similar to the arc tube container can be used. A shroud may be used as a double tube to increase impact strength.

  The shroud is attached to the support member by holding the standing plates on both ends of the ring-shaped metal plate, which is substantially the same shape as the end surface of the shroud. It is possible to hold it from both sides of the inner and outer surfaces, and fix some standing pieces by connecting them to the support member and band member by means such as welding, or to the opposite part of the end of the shroud in the axial direction Cuts may be provided, and the pair of cuts may be locked by a means such as mounting on a band member that fixes the arc tube.

  In addition, the frame-shaped support member that supports the arc tube and the shroud is configured so that no electric potential is applied to avoid photoelectron action, and is used as a power supply member for the electrode in arc tubes that do not enclose sodium halide. The member may be a member to which an electric potential is applied, or may be a support member composed of two parts in which the upper and lower ends of the arc tube and the shroud are separated.

  Also, when the mount is inserted into the outer tube valve, the mount is accommodated in a cylindrical body having a diameter smaller than the inner diameter of the neck portion in order to prevent scratches on the inner wall surface of the neck portion and the coating. If the sealing operation is performed after inserting the tube and pulling out only the cylindrical body from the valve, the elastic locking member does not directly contact the inner wall surface of the neck portion, which may damage the inner wall surface and the coating. Absent.

  Furthermore, the lighting device is not limited to the one shown in the above embodiment, and may include a lighting circuit device in the main body or a lighting circuit device provided outside the main body and connected to a high-pressure discharge lamp. A reflecting mirror or a light-transmitting cover member may be provided in the main body.

  This lighting device can be used for lighting in stores, halls, underground malls, offices and sports facilities.

L1, L2: Metal halide lamp,
1: arc tube,
3: Mount
41, 42: support members,
5: Glass outer tube valve,
51: neck part,
52: bulge part,
6: Clasp,
7: elastic locking member,
9: Lighting device

Claims (4)

Arc tube;
A pair of support members for supporting the arc tube;
A stem to which the support member is attached;
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 the stem is sealed at the end of the neck portion;
Extending in the same direction as the pair of support members, one end portion is fixed to the side portion of the support member, and the intermediate portion has a bent portion that protrudes laterally and is disposed on the bulging portion. A pair of elastic locking members provided such that the maximum distance between the pair of bent portions is larger than the minimum inner diameter portion of the neck portion;
A base joined to the sealing portion and electrically connected to the arc tube;
A high-pressure discharge lamp comprising:   The interval between the angle-shaped bent portion protruding to the side of the intermediate portion of the elastic locking member and the valve inner wall in the neck portion direction on the virtual extension along the tube axis of the outer tube valve of the bent portion is 20 mm or less. The high pressure discharge lamp according to claim 1, wherein the high pressure discharge lamp is provided.   The high-pressure discharge lamp according to claim 1 or 2, wherein a free end of the other end portion of the elastic locking member opposite to the fixed portion is separated from the support member. A lighting device body;
The high-pressure discharge lamp according to any one of claims 1 to 3 disposed in the lighting device main body;
A lighting device comprising:

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