JP2010015828A - Fluorescent lamp with built-in ballast and lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluorescent lamp with a built-in ballast and a lighting fixture capable of improving brightness startup characteristics with light flux maintained. <P>SOLUTION: With the fluorescent lamp 20, an inside of a lamp body 23 is divided into a space S1 and a space S2 by a holder 22. A ballast 27 is housed in the space S1 surrounded by the holder 22 and the lamp body 23. An arc tube is provided in the sealed space S2 surrounded by the holder 22 and a globe 21. An end part 31a of a U-tube of the arc tube is covered with metal components 34, equipped with an electrode part 35 at the tip. An end part 31b of the U-tube is equipped with an exhaust tube 37 with its tip end sealed used on enclosing gas into the arc tube in a manufacturing process. The holder 22 is made penetrated into the exhaust tube 37 which is preliminarily formed long, and has its tip put into the space S1. As heat generated at the arc tube 30 is thermally moved to the space S1 through the exhaust tube 37, temperature rise inside the arc tube 30 is restrained to restrain rise of a coldest-point temperature. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ballast-equipped fluorescent lamp and a lighting fixture.

  From 2007, the fluorescent lamp with GX53 cap was approved in Japan due to the revision of technical standards. The GX53 base fluorescent lamp uses an inverter built-in light bulb, so there is no need for an inverter on the side of the lighting fixture, and the arc tube is arranged in a plane, making it a thin and compact design. Downlights and thin pendants Widespread use as lighting.

Patent Document 1 describes that an inverter power source and a fluorescent lamp are housed in a cover to save space such as a straight tube fluorescent lamp. Patent Document 2 is directed to a thin and small fluorescent lamp device having a lighting device, and Patent Document 3 is a flat light source discharge lamp device. In Patent Document 2, the body of the fluorescent lamp device is provided with an aluminum holder to release heat of the fluorescent lamp to the outer peripheral portion, and the partition plate is provided to block the heat, and the temperatures of the lighting device and the base portion are controlled. It is described to reduce. Further, Patent Document 3 discloses that the mercury vapor pressure is properly maintained by increasing the distance between the electrode at the end of the straight pipe portion and the narrow tube in which the amalgam is enclosed, and suppressing the temperature rise of the amalgam, and lighting. It is described to prevent a decrease in brightness at the time.
JP 2006-190694 A JP 2007-180011 A JP 2007-294428 A

  Fluorescent lamps employing this GX53 base have a thin and sealed structure, and lighting fixtures often have a thin structure, and the lamp tends to be hot. An example of the fluorescent lamp is shown in FIG. In FIG. 5, the tip of the arc tube is housed in a sealed space surrounded by a globe and a holder. If the fluorescent lamp is continuously used, the temperature of the space surrounded by the arc tube and the globe including the arc tube and the holder rises. At high temperatures, the lamp becomes inefficient and the brightness decreases. Further, when an amalgam capable of controlling the mercury vapor pressure even in a high temperature region is employed, there arises a problem that the rise time of brightness (light flux) immediately after lighting is delayed.

  Patent Documents 2 and 3 describe a method for suppressing the temperature rise of the lamp, but the temperature rise is suppressed for the space surrounded by the globe including the arc tube and the holder. By suppressing the temperature rise of the arc tube itself, it is possible to efficiently maintain the brightness of the lamp. Further, it is not necessary to use an amalgam capable of controlling the mercury vapor pressure even in a high temperature range, so that the brightness rise characteristic is improved. Furthermore, in consideration of environmental problems, it is desirable that the fluorescent lamp uses as little mercury as possible.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ballast-equipped fluorescent lamp and a luminaire that can improve brightness rising characteristics while maintaining a luminous flux.

The fluorescent lamp with built-in ballast according to the first aspect of the present invention,
Arc tube,
A holder for supporting the arc tube;
A housing that houses the arc tube and at least a part of which is made of the holder and is sealed;
A ballast supported on a surface of the holder opposite to the surface supporting the arc tube;
A part of a member constituting the arc tube, and a tip portion protruding from the housing through the holder;
It is characterized by providing.

The lighting fixture according to the second aspect of the present invention is:
A ballast-equipped fluorescent lamp according to the first aspect of the present invention is provided.

  According to the present invention, the brightness rise characteristic is improved while maintaining the luminous flux.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  FIG. 1 is a plan view of an embedded lighting fixture using a fluorescent lamp with a GX53 base according to an embodiment of the present invention. FIG. 2A is a cross-sectional view of the embedded luminaire according to the embodiment, and represents a cross section taken along the line MM of FIG. FIG.2 (b) is the top view which showed the fluorescent lamp and socket of the embedded type lighting fixture which concerns on embodiment, and is seen from the lighting fixture bottom side. FIG. 3 is a partial cutaway view of a cross section of the fluorescent lamp of the GX53 base according to the embodiment.

  The lighting fixture 1 includes a fixture body 10 and a fluorescent lamp 20. When the fluorescent lamp 20 is attached to the fixture main body 10 of the lighting fixture 1, the fixture main body 10 and the fluorescent lamp 20 are fitted with almost no gap. The lighting fixture 1 is embedded in an attachment surface B such as a ceiling, for example, and the attachment surface B and the fluorescent lamp 20 are in a flat state.

  Two to four arms 11 for fixing the luminaire 1 to the attachment surface B are provided at equal intervals on the outer side surface of the fixture body 10. A power supply base 12 is provided on the outer upper surface of the instrument body 10. The power supply stand 12 connects an external power supply and the lighting fixture 1. In addition, two power supply terminal blocks 16 for electrical connection between the fluorescent lamp 20 and the lighting fixture 1 are provided near the bottom surface inside the fixture body 10. The power terminal block 16 includes a spring terminal that sandwiches or supports the flange-shaped electrode 26 of the fluorescent lamp 20.

  The socket 13 is attached to the vicinity of the bottom surface inside the instrument body 10 with a screw in advance, and is integrated with the instrument body 10. The socket 13 has a shape that fits with the base 24 of the fluorescent lamp 20, and a tubular part that covers the side surface of the base 24 and a brim part that covers the surface of the fluorescent lamp 20 on the side provided with the flange-shaped electrode 26. The shape is a combination of In the socket 13, a convex portion 15 that engages with the L-shaped groove 25 is formed at a portion of the side surface inside the cylindrical portion facing the L-shaped groove 25 of the base 24 of the fluorescent lamp 20. By engaging the convex portion 15 and the L-shaped groove 25, the socket 13 and the fluorescent lamp 20 can be attached, and the fluorescent lamp 20 can be attached to the lighting fixture 1. Specifically, the convex portion 15 and the L-shaped groove 25 are aligned, the base 24 is passed through the socket 13, the surface on the side provided with the collar portion 22 and the base 24 approaches and the insertion is deepest, By rotating the fluorescent lamp 20 along the L-shaped groove 25, the convex portion 15 and the L-shaped groove 25 are hooked.

  When the convex portion 15 and the L-shaped groove 25 are aligned, a dharma hole 14 is formed in the collar portion of the socket 13 at a position facing the flange-shaped electrode 26 of the fluorescent lamp 20. When the base 24 is inserted into the socket 13 most deeply, the head portion of the flange-shaped electrode 26 penetrates the thick portion of the Dharma hole 24. When the fluorescent lamp 20 is rotated, the flange-shaped electrode 26 slides from the tapered portion toward the tapered portion, and when the convex portion 15 and the L-shaped groove 25 are hooked, the head portion of the flange-shaped electrode 26 is Hang on the dharma hole 14. Furthermore, by providing the power terminal block 16 of the fixture body 10 at a position where the flange-shaped electrode 26 is slid and hooked, it is possible to make an electrical connection when the fluorescent lamp 20 is attached to the lighting fixture 1. It becomes.

  The fluorescent lamp 20 includes a globe 21, a holder 22, a lamp body 23, a base 24, a flange-shaped electrode 26, a ballast 27, and an arc tube 30. The holder 22 is made of an insulating resin or the like, has a plate shape, and can partition the internal space of the lamp body 23. A space S <b> 1 for accommodating the ballast 27 is formed in a portion surrounded by the holder 22 and the lamp body 23. Further, the globe 21 is attached to the lamp main body 23 so as to be fitted to the holder 22, and a sealed space S <b> 2 of a portion surrounded by the globe 21 and the holder 22 is formed. The space S <b> 2 is made of a translucent globe 21 on one side and accommodates the arc tube 30. At this time, the holder 22 supports the ballast accommodated in the space S1 and the arc tube 30 accommodated in the space S2, respectively, and can be fixed so as not to move in the space.

  The lighting fixture 1 can be turned on by electrically connecting the ballast 27 and the power base 12 and the ballast 27 and the arc tube 30. First, an electric current is applied to the electrode of the arc tube 30 to discharge it, and the moving electrons collide with mercury (atoms). Mercury atoms receiving energy from electrons generate ultraviolet rays, and the fluorescent lamps are irradiated with the ultraviolet rays and visible rays are generated, whereby the fluorescent lamp 20 shines. A ballast 27 is used to obtain the current required for this discharge.

  The space S1 needs to satisfy the upper-limit standard temperature during use when the ballast 27 is used, that is, when the lighting fixture 1 is turned on. The lamp body 23 is made of a material having high thermal conductivity such as aluminum, and the lamp body 23 can absorb the heat generated in the space S1 and release the heat to the outside of the space S1.

  The space S1 may contain not only the ballast 27 but also a circuit board such as an electronic circuit, a capacitor, an inductor, and the like, which are electrical parts necessary for lighting. In the case of housing, the holder 22 is fixed and supported in the same manner as the ballast 27.

  The arc tube 30 accommodated in the space S2 is composed of a glass tube coated with a fluorescent material and electrodes attached to both ends of the glass tube. The arc tube 30 is formed by connecting bent U-shaped tubes 31, 32, and 33 with a communication tube, and functions as one arc tube 30. The U-shaped tubes 31 and 33 are configured to be line-symmetric with respect to the U-shaped tube 32, and one ends (end portions 31 a and 33 a) of the U-shaped tubes 31 and 33 are covered with a metal part 34. . The metal part 34 has an electrode for discharging electrons inside the arc tube 30 side, and the temperature is highest. The other end (end portions 31 b and 33 b) includes an exhaust pipe 37. The exhaust pipe 37 is used when gas is sealed in the arc tube 30 in the manufacturing process, and the tip is sealed after the gas is sealed.

  A hole is formed in a part of the holder 22 that fixes and supports the arc tube 30, and the tip of the exhaust tube 37 is inserted into the space S1. The hole of the holder 22 after passing through the exhaust pipe 37 is closed with an adhesive or the like so that the space S1 and the space S2 do not contact each other.

  When the lighting fixture 1 is turned on and the fluorescent lamp 20 is caused to emit light, heat is gradually accumulated in the arc tube 30, and the temperature of the arc tube 30 gradually increases. At this time, the lowest temperature in the tube is called the coldest spot temperature. If the coldest spot temperature exceeds a predetermined value, the mercury vapor pressure in the arc tube 30 exceeds the optimum value and the brightness (light flux) falls, so the coldest spot temperature needs to be kept below the predetermined temperature. .

  The exhaust pipe 37 provided in the U-shaped tubes 31a and 33a of the arc tube 30 is a space continuous with the U-shaped tubes 31a and 33a, and the temperature in the exhaust tube 37 as well as in the arc tube 30 rises. As the temperature of the arc tube 30 rises, the temperature of the space S2 having the arc tube 30 also rises. The space S1 and the space S2 are partitioned by the holder 22, and heat transfer between the space S1 and the space S2 is hardly performed. In the space S <b> 1, there is heat generated by using the ballast 27, but the value is sufficiently smaller than the heat generated in the arc tube 30.

  The heat generated in the arc tube 30 increases the temperature in the arc tube 30 and causes the coldest spot temperature to increase. Further, the temperature of the space S2 is increased. At this time, the tip of the exhaust pipe 37 is provided in the space S1, and heat is transferred from the tip of the exhaust pipe 37 toward the space S1 where the temperature is low. If the space S2 is a closed space, heat is being accumulated, but since heat can be released from the exhaust pipe 37 toward the space S1, the temperature rise of the arc tube 30 is suppressed. Is possible. By suppressing the temperature rise of the arc tube 30, the coldest spot temperature in the arc tube 30 can be lowered, and the brightness can be maintained.

  At this time, the heat of the arc tube 30 moves to the space S1 through the exhaust pipe 37 and is accumulated. Most of the space S <b> 1 is covered with the lamp body 23. Since the lamp body 23 is made of a material having high thermal conductivity, such as aluminum, the lamp body 23 emits heat accumulated in the space S1 toward the outside of the light emitting lamp 20, and satisfies the upper limit standard temperature of the space S1. To maintain. Therefore, the arc tube 30 and the space S1 can be kept at a predetermined temperature or less, and the fluorescent lamp 20 can be continuously used while maintaining the brightness.

  In the example shown in FIG. 5, in order to prevent the coldest spot temperature of the arc tube 30 from becoming high, the temperature rise of the space S <b> 2 around the arc tube 30 is suppressed and the temperature of the arc tube 30 is indirectly increased. There were cases where it was done to prevent. In the present embodiment, it is possible to directly suppress the temperature rise in the arc tube 30 and efficiently suppress the rise of the coldest spot temperature.

  Moreover, in the example of a related technique, the amalgam which can control mercury vapor pressure also in a high temperature region may be used besides the method of suppressing the temperature rise of space S2. In this case, there arises a problem that the rise time is delayed, that is, it does not become bright immediately after lighting. However, in the embodiment, the coldest spot temperature in the arc tube 30 can be kept at a predetermined temperature or lower, and the amalgam described above is not used, so that the rise time is not delayed. Further, the amount of mercury used in the arc tube 30 can be reduced, and the fluorescent lamp 20 and the lighting apparatus 1 can be obtained in consideration of the environment.

(Modification of the embodiment)
FIG. 4 is a partially cutaway view of a cross section of a fluorescent lamp of the GX53 base according to a modification of the embodiment. The embedded lighting fixture using the fluorescent lamp of the GX53 base according to the modification of the embodiment is the one shown in FIGS. 1 and 2, and the basic structure is the same.

  The arc tube 30 of the fluorescent lamp 20 includes U-shaped tubes 31, 32, and 33, and is configured to be mirror-symmetric with respect to the U-shaped tube 32. The U-shaped tubes 31, 32, and 33 are connected to each other by a communication tube and function as one arc tube 30. Each of the U-shaped tubes 31 and 33 is covered with a metal part 34 at one end (end portions 31 a and 33 a), and includes an electrode portion 35 connected to the ballast 27. The metal part 34 has an electrode for discharging electrons inside the arc tube 30 side, and the temperature is highest. The other end (end portions 31b, 33b) includes a sealed exhaust pipe 36 used when gas is sealed in the arc tube 30 in the manufacturing process. Near the other ends (end portions 31b and 33b), a narrow tube 38 extending from the U-shaped tubes 31 and 33 toward the bottom surface of the instrument body 10 is formed, and the inside of the arc tube 30 and the narrow tube 38 have the same atmosphere. .

  The narrow tube 38 has a shape in which the tip is disposed in the space S <b> 1 and passes through a hole formed in the holder 22 in advance. After passing the thin tube 38 through the space S1, the periphery of the hole of the holder 22 is closed with an adhesive or the like so that a gap is not formed, so that the space S1 and the space S2 do not contact each other.

  When the lighting fixture 1 is used, heat is gradually accumulated in the arc tube 30, the temperature in the arc tube 30 gradually increases, and the temperature in the narrow tube 38 connected to the arc tube 30 also increases. As the temperature of the arc tube 30 rises, the temperature of the space S2 having the arc tube 30 also rises. The space S1 and the space S2 are partitioned by the holder 22, and heat transfer between the space S1 and the space S2 is hardly performed. In the space S <b> 1, there is heat generated by using the ballast 27, but the value is sufficiently smaller than the heat generated in the arc tube 30.

  The heat generated in the arc tube 30 causes a temperature rise in the arc tube 30 and further causes a temperature rise in the space S2. At this time, the tip of the thin tube 38 is provided in the space S1, and heat is transferred from the tip of the thin tube 38 toward the space S1 where the temperature is low. If the space S <b> 2 is a closed space, heat is accumulated, but heat can be released from the narrow tube 38 toward the space S <b> 1, thereby suppressing the temperature rise of the arc tube 30. It becomes possible.

  The space S1 contains the ballast 27 and needs to satisfy an upper limit standard temperature when an electronic circuit or the like is used. The heat of the arc tube 30 moves to the space S <b> 1 through the narrow tube 38, and most of the space S <b> 1 is surrounded by the lamp body 23. The lamp body 23 is made of a material having high thermal conductivity, such as aluminum, and the lamp body 23 absorbs the heat generated in the space S1 and releases the heat toward the outside of the light emitting lamp 20, so that the space S1. Temperature rise can be suppressed. Therefore, the space S1 can suppress the temperature rise of the arc tube 30 and the space S2 while satisfying the upper limit standard temperature.

  It is desirable that the narrow tube 38 has a shape extending toward the outer peripheral portion of the fluorescent lamp 20, and it is desirable that the thin tube 38 be formed near the outer peripheral portion of the fluorescent lamp 20 in the arc tube 30 portion. The holder 22 through which the thin tube 38 penetrates is provided with a ballast 27 in the vicinity of the center of the surface opposite to the surface supporting the arc tube 30. When the narrow tube 38 penetrating into the space S1 is close to the ballast 27, it is preferable that the position of the thin tube 38 and the ballast 27 are separated from each other because the heat from the thin tube 38 is easily given to the ballast 27. When the thin tube 38 is close to the ballast 27, it is desirable to dispose the ballast 27 so that components that are susceptible to heat, such as an electronic circuit, are located far from the thin tube 38. In addition, by making the narrow tube 38 long and covering the side surface with a heat insulating material so that heat is transferred only at the tip, heat can be efficiently transferred in the space S1, and the heat to the ballast 27 can be transferred. Reduce impact.

  In the modification of the embodiment, when the lighting fixture 1 is used, the brightness can be maintained by suppressing the temperature rise in the arc tube 30 and suppressing the rise of the coldest spot temperature. . Further, since an amalgam capable of controlling the mercury vapor pressure even in a high temperature range is not used, there is no problem that the rise time immediately after lighting, which is a disadvantage of this amalgam, is delayed. Furthermore, the amount of mercury used in the arc tube 30 can be reduced, and the fluorescent lamp 20 and the lighting apparatus 1 can be obtained in consideration of the environment.

  As described above, according to the present invention, it is possible to provide a luminaire that can improve the brightness rise characteristic while maintaining the luminous flux.

  In addition, the shape and type of the above-mentioned lighting fixture, the type and shape of exhaust pipes and capillaries that play the role of heat transfer from the space in which the arc tube is accommodated to the space in which the ballast is accommodated, the position to be attached, the number, etc. are examples Any change and correction is possible.

  Other suitable modifications of the present invention include the following configurations.

  The ballast-equipped fluorescent lamp according to the first aspect of the present invention is preferably characterized in that the protruding tip portion is an exhaust pipe portion of the arc tube.

  Or you may comprise the said front-end | tip part which protruded so that it might become a thin tube with which the side part of the said arc_tube | light_emitting_tube was integrated with the said arc_tube | light_emitting_tube.

  More preferably, the base is a GX53 base.

It is a top view of the embedded lighting fixture using the fluorescent lamp of GX53 base concerning an embodiment of the invention. (A) is sectional drawing of the embedded lighting fixture which concerns on embodiment, and represents the MM sectional view of FIG. (B) is the top view which showed the fluorescent lamp and socket of the embedded lighting fixture which concern on embodiment, and is seen from the lighting fixture bottom face side. It is a partial fracture figure of the section of the fluorescent lamp of GX53 mouthpiece concerning an embodiment. It is a partial fracture figure of the section of the fluorescent lamp of GX53 nozzle concerning the modification of an embodiment. It is a partially broken figure of the cross section of the fluorescent lamp of GX53 nozzle | cap | die of related technology.

Explanation of symbols

1 lighting equipment
10 Instrument body
20 Fluorescent lamp
21 Globe
22 Holder
23 Lamp body
24 base
27 Ballast
30 arc tube 31, 32, 33 U-shaped tube
35 Electrode part 36, 37 Exhaust pipe
38 Capillary S1, S2 space

Claims (5)

Arc tube,
A holder for supporting the arc tube;
A housing that houses the arc tube and at least a part of which is made of the holder and is sealed;
A ballast supported on a surface of the holder opposite to the surface supporting the arc tube;
A part of a member constituting the arc tube, and a tip portion protruding from the housing through the holder;
A ballast built-in fluorescent lamp characterized by comprising:   The ballast-embedded fluorescent lamp according to claim 1, wherein the protruding tip portion is an exhaust pipe portion of the arc tube.   2. The ballast-embedded fluorescent lamp according to claim 1, wherein the protruding tip is a thin tube provided on a side surface of the arc tube so as to be integrated with the arc tube.   The fluorescent lamp with built-in ballast according to any one of claims 1 to 3, further comprising a GX53 base.   A lighting fixture comprising the ballast-equipped fluorescent lamp according to any one of claims 1 to 4.

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