JP2009205860A - Electrodeless discharge lamp and illumination fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp and an illumination fixture wherein, in the electrodeless discharge lamp equipped with an annular bulb, an mounting property to the illumination fixture is improved while reducing cost, and a wide range of illumination is possible since light can be emitted in all directions that intersect a peripheral wall of a part from the whole of a part emitting the light in the bulb. <P>SOLUTION: The electrodeless discharge lamp is equipped with a bulb 1 having a first tubular body 1a formed of glass and a second tubular body 1b which is a molded product formed of ceramics. Then, the bulb 1 has an annular closed space formed in such a manner that the opening end 4a of the first tubular body 1a and the opening end 4b of the second tubular body 1b are adhered, and a mounting part 8 mounted to the illumination fixture (not shown) is integrally formed at the second tubular body 1b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, there is no electrode in the bulb filled with the discharge gas, and the discharge gas is discharged by applying a high-frequency electromagnetic field generated in the bulb to the induction gas by applying a high-frequency current to the induction coil. The present invention relates to an electrodeless discharge lamp and a lighting fixture using the same.

  2. Description of the Related Art Conventionally, an electrodeless discharge lamp including a bulb formed in an annular shape and filled with a discharge gas and a lighting fixture including the electrodeless discharge lamp have been proposed (see Patent Documents 1 to 3).

  Here, the bulb of the electrodeless discharge lamp described in Patent Documents 1 to 3 generally has a shape in which a light-transmitting glass tube is formed in an annular shape, and a function of the lamp is formed in a part of the bulb. The exhaust pipe which consists of a glass thin tube required for the top and manufacture is connected.

  In addition, as a method of manufacturing an annular bulb with a thin tube, two U-shaped tubes are produced on the other side, taking into consideration that the phosphor is uniformly attached to the inner surface of the bulb, and one of the above-mentioned glass-made bulbs is produced. Are generally connected to the inner surface of each U-shaped tubular body, and then the two U-shaped tubular bodies are welded (see Patent Document 3). ).

  However, in the above-described method for manufacturing an annular bulb with a thin tube, as a glass processing step, there are two steps of bending a glass cylindrical tube into a U shape, one U-shaped tube. The exhaust pipe connection process for connecting the thin tube to the body is one process, and the connection process for welding the open ends of the two U-shaped pipe bodies is one process, and the number of processes is large.

  On the other hand, as shown in FIG. 3, it has a tubular body 1c ′ bent in a U-shape and a hollow box-shaped stem 1d ′ for connecting both ends of the tubular body 1c ′. There has been proposed an electrodeless discharge lamp including a bulb 1 'formed of ceramics (see Patent Document 4).

  Here, in the bulb 1 ′ of the electrodeless discharge lamp described in Patent Document 4, the bending step of bending the glass cylindrical tube body into a U-shape is reduced to one step among the glass processing steps. Therefore, the number of glass processing steps can be reduced.

  In addition, a ceramic lamp body formed in a concave shape and a flat glass plate bonded to the front surface of the lamp body by a frit seal are provided, and the space surrounded by the lamp main body and the flat glass plate is discharged. An electrodeless discharge lamp serving as a space has been proposed (Patent Document 5).

Here, in the electrodeless discharge lamp described in Patent Document 5, since the bulb is composed of a ceramic lamp body formed in a concave shape and a flat glass plate, the above bending process is unnecessary. Thus, the number of glass processing steps can be reduced.
JP 2007-227120 A JP 2007-227119 A JP 2007-220387 A Japanese Examined Patent Publication No. 6-97604 JP-T-2001-507164

  However, the electrodeless discharge lamp having the configuration shown in FIG. 3 has a buffer structure that can protect the bulb 1 ′ that is a mounting part for attaching to the lighting fixture and is easily damaged when the bulb 1 ′ is attached to the lighting fixture. In other words, the electrodeless discharge lamp was not easily mounted.

  The electrodeless discharge lamp proposed in Patent Document 5 includes a ceramic lamp body and a flat glass plate bonded to the front side of the lamp body, and the electrode body has an electrodeless discharge lamp. By forming a mounting portion for mounting on a lighting fixture or the like, the mounting component can be made unnecessary, but the portion that emits light is limited to a glass plate that closes the opening on the front side of the lamp body. As a result, the radiation direction of the light is limited, so that a wide area cannot be illuminated.

  The present invention has been made in view of the above-mentioned reasons, and the object thereof is to improve the attachment property to a lighting fixture while reducing the cost, and from the entire portion that emits light in the bulb, the portion. It is an object of the present invention to provide an electrodeless discharge lamp and a luminaire capable of illuminating a wide range because light can be radiated in all directions intersecting with the peripheral wall.

  The invention of claim 1 includes a first tubular body formed of translucent glass, and a second tubular body that is a molded product formed of any one material of ceramics, synthetic resin, and metal. A valve having an annular closed space formed by adhering the opening end of the first tube body and the opening end of the second tube body, the valve having the second tube body Is characterized in that an attachment portion for attaching to a lighting fixture is integrally formed.

  According to this invention, it has the 1st pipe body formed with the translucent glass, and the 2nd pipe body which is a molded article formed with any one material of ceramics, a synthetic resin, and a metal. A bulb is provided, and the second tube body is integrally formed with an attachment portion for attachment to a lighting fixture. Therefore, by reducing the glass processing steps, it is possible to reduce costs by simplifying the bulb manufacturing process. The attachment property to the lighting apparatus can be improved. Further, since the attachment portion is formed integrally with the second tube body provided in the valve, it is not necessary to form a structure for connecting the second tube body and the attachment portion, and the shape of the attachment portion is not required. It can be made more compact. In addition, as described above, since the attachment portion is formed integrally with the second tube body, it is an attachment part for attachment to a lighting fixture, and has a buffer structure that protects a glass bulb or a base. Corresponding parts are not required, the number of parts can be reduced, and an adhesive for adhering the valve to the base is also unnecessary, thereby reducing costs. Furthermore, light can be emitted in all directions intersecting the peripheral wall of the portion from the entire portion corresponding to the first tubular body that is formed of light-transmitting glass in the bulb and emits light, so that a wide range of illumination is possible There is an effect of becoming.

  According to a second aspect of the present invention, the electrodeless discharge lamp according to the first aspect is provided.

  According to this invention, light can be emitted in all directions intersecting with the peripheral wall of the part from the whole part that is formed of translucent glass and is radiated in an annular bulb, and the radiation direction of the light is limited. Since there is no electrodeless discharge lamp, it is possible to provide a luminaire capable of illuminating a wide range without limiting the illuminable range. In addition, since there is no need for attachment parts for attachment to the lighting fixture, there is an effect that the number of parts can be reduced and cost can be reduced.

  According to the invention of claim 1, for an electrodeless discharge lamp having a bulb having an annular closed space, it is possible to reduce the cost by simplifying the manufacturing process by reducing the number of glass processing steps, and to attach to a lighting fixture. In addition, light can be emitted in all directions intersecting the peripheral wall of the portion from the entire portion corresponding to the first tubular body that is formed of translucent glass and emits light in the bulb. A wide range of lighting is possible.

  According to the invention of claim 2, light can be emitted in all directions intersecting with the peripheral wall of the part from the whole part formed of translucent glass in the annular bulb and emitting light, and the radiation direction of light is limited. Therefore, it is possible to provide a luminaire capable of illuminating a wide range without limiting the illuminable range.

  Hereinafter, the electrodeless discharge lamp of this embodiment is demonstrated based on FIG.

  The electrodeless discharge lamp of the present embodiment includes a bulb 1 having an annular closed space (in this embodiment, an oval annular closed space) in which a discharge gas described later is enclosed, and the bulb 1 is as shown in FIG. The U-shaped first tube 1a made of glass, which is a translucent material, and the U-shaped second tube 1b formed of ceramics.

  Further, inside the bulb 1, a discharge gas composed of an inert gas (for example, neon, argon, krypton, xenon, etc.) and mercury vapor is enclosed. Here, the discharge gas is introduced into the bulb 1 through a glass thin tube 3 having one end connected to a later-described protrusion 14b provided on the second tube 1b. The thin tube 3 is also used as an exhaust pipe for exhausting the air in the valve 1. The narrow tube 3 is sealed with only a specified length after the discharge gas is introduced.

  The first tubular body 1a described above heats the central portion of a glass cylindrical tubular body, immediately after that, a cylindrical mold is assigned to the heated portion, and both ends of the tubular body are formed into a cylindrical mold. It is formed by sandwiching and bending along On the other hand, the second tubular body 1b is a molded product that is molded by injecting ceramics into a mold, and two annular protrusions 6 and 6 are respectively provided in both ends of the second tubular body 1b in the tube axial direction. Are spaced apart from each other. Moreover, the cylindrical protrusion part 14b which protruded from the center part is formed in the bending part 13b of the said U-shaped 2nd pipe 1b.

  Further, the two connecting portions of the first tubular body 1a and the second tubular body 1b are located on a plane perpendicular to the longitudinal direction of the elliptical bulb 1 and are centered in the longitudinal direction of the elliptical bulb 1 It is located at a location shifted to one side. That is, the length of the discharge path corresponding to the first tubular body 1a is formed to be longer than the length of the discharge path corresponding to the second tubular body 1b.

  The ferrite cores 2 and 2 are attached to portions between the two annular protrusions 6 and 6 that are formed at both ends of the second tube 1b so as to be separated from each other in the tube axis direction. The ferrite core 2 is formed so as to be divided into two parts by a plane including a cross section perpendicular to the circumferential direction in a donut shape having a quadrangular cross section. Here, an induction coil (not shown) is wound around a part of each ferrite core 2, and when a high frequency current is passed through the induction coil, a high frequency electromagnetic field is generated inside the valve 1. The ferrite core 2 is formed of a magnetic material that is a metal compound such as zinc, manganese, nickel, or iron.

  The first tubular body 1a and the second tubular body 1b are made of glass frit obtained by liquefying glass powder with a solvent, and an opening end 4a of the first tubular body 1a and an opening end 4b of the second tubular body 1b. After the coating, the valve 1 having an annular closed space is formed by adhering the solvent applied to each of the opening ends 4a and 4b by vaporizing at a high temperature in a state where the opening ends 4a and 4b are in contact with each other. ing.

  Further, the protrusion 14b and the thin tube 3 of the second tubular body 1b are also protruded after applying glass frit made of glass powder with a solvent to the inside of the tubular protrusion 14b and the outer peripheral wall of the thin tube 3. In the state where the thin tube 3 is inserted into the part 14b, the applied solvent is vaporized at a high temperature to be bonded.

  Thus, among the manufacturing processes of the bulb 1, the glass processing step is one step of bending a glass cylindrical tube into a U-shape, and the first tube 1a and the narrow tube are formed in the second tube 1b. The number of glass processing steps can be reduced as compared with the prior art, and the manufacturing cost of the electrode 1 can be reduced by simplifying the manufacturing process of the bulb 1. The effect that the cost can be reduced is obtained.

  In the above-described example, the case where the second tubular body 1b in which the attachment portion 8 is integrally formed is formed of ceramics is not limited to this, and the attachment portion 8 is integrally formed. The second tubular body 1b may be a molded product made of synthetic resin or metal.

  The valve 1 having the configuration shown in FIG. 1 has an elliptical outer shape, but the annular tube (not shown) has a first tubular body (not shown) made of glass, ceramics, A second tubular body (not shown) that is a molded product formed of one of a resin and a metal, and the two connecting portions of the two tubular bodies include a cross section perpendicular to the tube axis direction. What is formed so as to be positioned on one side when divided on a plane, that is, the length of the discharge path of the first tubular body is longer than the length of the discharge path of the second tubular body Thus, the same effect as described above can be obtained.

  The same effect as described above can be obtained with a spherical valve (not shown). The spherical bulb is inserted through an opening formed in a part of the bulb, closed at one end, and welded at the other end to the opening. The stem is made of a glass cylindrical member and has an exhaust pipe at the center ( It is common to have (not shown). Here, for example, by forming a hemispherical portion on the opposite side of the opening portion of the bulb with glass, and integrally forming the portion including the other stem portion with ceramic, resin, or metal material, Since the glass processing step is only one step of forming the glass into a hemispherical shape, an effect of reducing the cost of the electrodeless discharge lamp can be obtained by reducing the manufacturing cost by simplifying the manufacturing process of the bulb.

  Further, in the electrodeless discharge lamp having the configuration of FIG. 1, an attachment portion 8 for attaching the electrodeless discharge lamp to the lighting fixture 20 (see FIG. 2) is formed on the second tubular body 1 b. Here, the attachment portion 8 includes an attachment plate 8a having four attachment holes 8c through which attachment screws 81 (see FIG. 2) for attaching the electrodeless discharge lamp to the luminaire 20 are inserted, and one end thereof. The second tube 1b is formed continuously with the other end, and the other end is formed continuously with the mounting plate 8a.

  Thus, in the electrodeless discharge lamp of the present embodiment, since the attachment portion 8 is formed integrally with the second tube 1b of the bulb 1, it is an attachment component for attachment to the lighting fixture 20, and the bulb 1 is What has the buffer structure which protects becomes unnecessary, and there exists an effect which improves the attachment property to the lighting fixture 20. FIG. Further, since the attachment portion 8 is formed integrally with the second tubular body 1b, it is not necessary to form a structure for connecting the second tubular body 1b and the attachment portion 8, and the attachment portion 8 The shape can be made compact. Furthermore, in addition to the above-described mounting parts, a part corresponding to the base is unnecessary, so the number of parts can be reduced, and an adhesive for bonding the bulb 1 to the base is also unnecessary, so the cost of the electrodeless discharge lamp is reduced. There is also an effect that can be reduced.

  In addition, the electrodeless discharge lamp of the present embodiment includes the first tube even when the second tube 1b of the bulb 1 is a molded product made of ceramics and has no translucency. Since light is emitted in all directions intersecting with the peripheral wall of the portion corresponding to the first tubular body 1a from the entire portion corresponding to the body 1a, a wide range can be illuminated.

  FIG. 2 shows a luminaire 20 provided with the electrodeless discharge lamp described in the present embodiment, in which couplers 12 to be described later are arranged at four locations of the bulb 1.

  The lighting fixture 20 has a U-shaped fixture body 21 having two bent pieces formed by bending both longitudinal ends of a rectangular plate piece in plan view in one direction orthogonal to the plate piece, The electrodeless discharge lamp and the lighting device 11 shown in the first embodiment are housed in the appliance main body 21, and the electrodeless discharge lamp has an attachment screw 81 inserted through the appliance attachment hole 8 c of the attachment portion 8. The plate 21 is fixed to the instrument body 21 by being screwed into a screw hole (not shown) drilled at a position corresponding to the instrument mounting hole 8c. Here, in the electrodeless discharge lamp, as described above, the coupler 12 formed by winding an induction coil (not shown) around a part of the ferrite core 2 (see FIG. 1) is connected to the first tube of the annular bulb 1. Two portions corresponding to the body 1a and two portions corresponding to the second tubular body 1b are arranged. The lighting device 11 is for lighting the electrodeless discharge lamp by supplying a high frequency current to the induction coil 3 included in the electrodeless discharge lamp, and is electrically connected to the induction coil 3 via the electric wire 23. Is. In addition, the other end of the two bent pieces whose one ends are continuous with the main piece in the instrument main body 21 are provided with flange portions 21a and 21a formed so as to protrude away from each other. Both ends of 22 in the longitudinal direction are fixed so as to be placed on the flanges 21a and 21a.

  Thus, the luminaire 20 of the present embodiment emits light in all directions intersecting the peripheral wall of the portion corresponding to the first tubular body 1a from the entire portion corresponding to the first tubular body 1a. Since a lamp is provided, a wide area can be illuminated.

It is a disassembled perspective view of the electrodeless discharge lamp of embodiment. The lighting fixture provided with the electrodeless discharge lamp of embodiment is shown, (a) is a schematic bottom view of the state which removed the glass plate, (b) is a schematic side view. It is a schematic perspective view of the electrodeless discharge lamp of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve | bulb 1a 1st tube 1b 2nd tube 2 Ferrite core 3 Narrow tube 4a, 4b Open end 8 Attachment part 20 Lighting fixture

Claims (2)

  A valve having a first tubular body formed of translucent glass and a second tubular body that is a molded product formed of any one material of ceramics, synthetic resin, and metal; It has an annular closed space formed by adhering the opening end of the first tube body and the opening end of the second tube body, and is attached to the lighting fixture on the second tube body An electrodeless discharge lamp, wherein the mounting portion is integrally formed. A lighting fixture comprising the electrodeless discharge lamp according to claim 1.

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