JP2006093044A - Bulb-shaped fluorescent lamp and lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulb-shaped fluorescent lamp device which suppresses flowing out of the thermal conductive substance for efficiently radiating the heat inside the cover out of the heat generated during lighting, to outside before hardening, and which prevents the occurrence of nonconformities of the adjoining components due to thermal expansion or the like, and a lighting apparatus that uses this lamp device. <P>SOLUTION: The bulb-shaped fluorescent lamp has a curved glass tube bulb 13; a holder 6 supporting the edge part side of this fluorescent lamp 1; a lighting circuit device 4 supported by the holder 6, having a circuit board 42 to which electronic components 41, ... to be electrically connected to the fluorescent lamp 1 are connected; a cover 2 the one side of which a base 8 is installed, and the other side the holder 6 is installed and which houses the lighting circuit device 4 inside; and a thermal conductive substance 7 which is interposed so as to make contact at least a part of the specific electronic components 41 with the inner face of the cover 2 or the base 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fluorescent lamp device having a bent glass tube bulb and a lighting circuit device, and a lighting fixture using the fluorescent lamp device.

  Fluorescent lamps that are brighter and have a longer life than incandescent bulbs and generate less heat are well known as high-efficiency, energy-saving light sources, but they require lighting circuit devices such as ballasts to light up.

  The fluorescent lamp constituting this bulb-type fluorescent lamp device is a so-called bowl shape in which a glass tube bulb with electrodes sealed at both ends is bent into a substantially U shape, or the substantially U shape bulb is further bent into a substantially U shape. Alternatively, a plurality of substantially U-shaped bulbs or straight tube-type glass tube bulbs are connected through a connecting pipe to reduce the size.

  A lighting circuit device comprising a circuit board to which the fluorescent lamp and the lighting circuit components are connected is attached to a holder made of a synthetic resin material, accommodated in a cover molded of the synthetic resin material, and most of the fluorescent lamp Is covered with a translucent glove attached to the opening of the cover formed of translucent glass or synthetic resin material.

  In recent years, the bulb-type fluorescent lamp apparatus has a narrower sealed space as the storage capacity of the lighting circuit device becomes smaller as the output becomes smaller and the temperature in the cover tends to rise more and more.

  In the case of an inverter circuit in which the lighting circuit device built in the bulb-type fluorescent lamp device is composed of electronic components, electronic components that are relatively heat-sensitive are also mounted. In order to protect these components thermally, However, it is necessary to radiate the heat in the cover more efficiently to the outside, and the temperature in the cover must be lowered reliably. Specific specifications of heat conductive materials such as silicone resin are required to dissipate the heat in the cover. The applicant of the present application has previously filed as Patent Document 1.

  As described in Patent Document 1, by restricting the specifications of the thermally conductive material and the like, the thermal protection of the electronic components can be enhanced and the reliability of the lighting circuit device can be enhanced.

However, since silicon before curing has fluidity, if a heat conductive material comes into contact with a member with weak mechanical strength such as a lamp tube (exhaust tube), it will be damaged by the stress during heat shrinkage. There is a risk of doing. That is, it is preferable that a thermal conductive material that is to be coated or coated on an electronic component flows out, and that an electronic component or a member such as a thin tube that cannot be adjacently coated is buried or adhered to the thermal conductive material. There was nothing.
Japanese Patent Laid-Open No. 2004-6204

  The present invention suppresses the heat conductive material for efficiently radiating the heat in the cover out of the heat generated during lighting from flowing out before curing, and also causes the occurrence of a problem that the adjacent parts receive due to thermal expansion etc. It is an object of the present invention to provide a bulb-type fluorescent lamp device that prevents this and a lighting fixture using the lamp device.

  The bulb-type fluorescent lamp device according to claim 1 of the present invention includes a fluorescent lamp having a bent glass tube bulb, and a thin tube provided at the end of the bulb, and supports the end of the fluorescent lamp. A lighting circuit device having a circuit board to which a holder and an electronic component supported by the holder and electrically connected to the fluorescent lamp are connected; a base on one side; the holder on the other side; A cover for housing the device, a partition provided so as to substantially surround at least a part of the specific electronic component or / and the thin tube constituting the lighting circuit device in the cover, and a cover for at least a part of the specific electronic component Or a thermally conductive material interposed so as to be in contact with the inner surface of the die.

  In this bulb-type fluorescent lamp device, the internal temperature of the cover increases due to heat generated by the electronic components of the lighting circuit device and the electrodes in the lamp when energized. Especially, the electronic components and the cover that are relatively hot during lighting are thermally conductive. Since it is in contact with the substance, the heat generated during lighting is transmitted to the cover through the heat conductive substance and is radiated from the outer surface of the cover, so that the temperature can be lowered.

  In this way, by enclosing the part to be radiated to the cover through the heat conductive material with the partition wall, the amount of the heat conductive material can be reduced. In addition, the partition wall can prevent the heat conductive material from flowing into the adjacent parts.

  Further, if the thin tube is separated from the electronic component by the partition wall, it is possible to suppress the thin tube from being buried or adhered in the heat conductive material, and thus the thin tube is not subjected to the stress. Further, when the amalgam is contained in the narrow tube, the thermal influence by the heat conductive material is suppressed, so that the amalgam can be operated at an optimum temperature.

  In the present invention and each of the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified.

  The fluorescent lamp bulb to which the present invention can be applied is a straight tube-type glass tube or a plurality of substantially U-shaped glass tubes connected on the same circumference, or a substantially U-shaped glass tube. A single discharge path bent by a glass tube is formed, such as a spiral bulb that is bent into a substantially U shape or has a spiral portion at least partially.

  Further, at both ends of the discharge path, a form such as crushing sealing is employed in addition to sealing using a stem such as a flare stem or a button stem provided with electrodes. A thin tube that can communicate with the bending valve may be provided. In addition, the narrow tube provided at the valve end may be attached to be able to communicate with the inside of the valve, or may be an extension of the valve end. Further, this thin tube may be used for enclosing amalgam for controlling the mercury vapor pressure in the tube being lit or for exhaust.

  The electrode is not limited to a hot cathode using a filament coil or the like, but may be a cold cathode, or an electrode may be provided on an intermediate glass tube forming a bulb.

  The discharge medium enclosed in the bulb is mercury or a rare gas such as argon, xenon, krypton, or neon. When encapsulating mercury, liquid mercury, amalgam, which is a mercury alloy containing mercury and indium, tin, bismuth, lead, etc., a mercury-releasing alloy of mercury, zinc, and titanium, or a porous material formed of ceramics or glass It may be a mercury pellet in which mercury is impregnated in a quality substrate. Alternatively, a lamp that emits noble gas without enclosing mercury may be used.

  As the phosphor film formed on the inner surface of the bulb, a rare earth phosphor such as a three-wavelength or five-wavelength emission type, a white-emitting halophosphate phosphor, or the like can be used. Further, a protective film such as alumina may be formed between the inner surface of the glass tube and the phosphor film.

  The holder that supports the fluorescent lamp may be formed of an electrically insulating heat-resistant synthetic resin material such as polybutylene terephthalate (PBT), and may also serve as a partition that partitions the lamp and the lighting circuit device. In addition, it is possible to integrally support a lighting circuit device or a globe having a circuit board to which a lighting circuit (electronic) component of the lamp is connected.

  The cover is formed with a cylindrical portion into which the dome-shaped portion and the base are inserted with a metal plate whose surface is covered with an electrically insulating heat-resistant synthetic resin material such as polybutylene terephthalate (PBT) or an electrically insulating material, for example, A base is attached to the outer periphery of the cylindrical portion. For example, the cylindrical portion is formed with a spiral groove into which a screw-type (E-type) base is screwed. Moreover, the shape of the dome-shaped part which covers a holder, a lighting circuit device, etc. does not ask | require.

  On the inner surface side of the cover or / and on the holder, a partition formed in the shape of a plate or the like that encloses and encloses these in advance at locations corresponding to the members is integrally formed or separately formed as a separate partition. It is provided by the means.

  For example, even if the partition wall is formed in a single plate shape that protrudes substantially perpendicularly to the inner wall surface of the cover from the cylindrical portion located on one end side of the cover toward the other end side that is the fluorescent lamp side, There may be a plurality of sheets. The plurality of plate-like partitions may be formed so as to extend in the cover central axis direction to form a polygonal hollow space by the plurality of plate-like partitions and the cover inner wall. Moreover, when the partition is formed separately, for example, it may be a partition formed in a substantially V shape, a substantially U shape, a substantially U shape, a substantially cylindrical shape, or the like by two partitions.

  This partition may be provided on at least one of the cover or holder (including the circuit board) depending on the position of the shielding member in consideration of its workability. It can be formed of a metal plate with a mark In addition, the shape is not limited as long as it has a space in which to-be-contained objects such as electronic components and thin tubes are sufficiently placed.

  Further, in addition to suppressing the loss of the heat conductive material, if it is desired to enhance the heat shielding effect by the partition wall, it may be formed of a material having a low heat conductivity, or may exhibit other functions. . Further, the cover may be provided with a through hole for ventilation or silicon injection.

  High-frequency lighting circuit components using an inverter for lighting this lamp and lighting circuit (electronic) components using a winding ballast are directly provided on or connected to a circuit board made of phenol resin, glass epoxy resin, etc. The circuit board of this lighting circuit device is fixed to the holder.

The thermally conductive material is an oxide of one kind of element (for example, Al ₂ O ₃ , SiO ₂ ) selected from the group consisting of aluminum (Al), silicon (Si), titanium (Ti), and magnesium (Mg) in silicon resin. , TiO ₂ , MgO, etc.), nitrides (eg AlN, Si ₃ N ₄ O ₂ etc.) and oxide hydrates (eg Al ₂ O ₃ .nH ₂ O, SiO ₂ , TiO ₂ .nH ₂ O, Mg ( The thermal conductivity can be increased by using 0.1 wt% or more of a filler composed of at least one of OH) _{2 and the} like.

  In addition, the thermally conductive material radiates heat from lighting and heat generated by the electronic component from the cover and the base by thermally connecting the surface of the electronic component and the cover and the base, respectively.

  The bulb-type fluorescent lamp device according to claim 2 of the present invention is characterized in that the partition wall is formed integrally or integrally with a cover or a holder.

  On the inner surface side of the cover or / and the surface of the holder (including the circuit board) corresponding to a member requiring heat shielding such as a high-temperature electronic component or a thin tube that maintains a predetermined temperature, a plate that houses and encloses these in advance A partition wall (partition) formed in a body shape or the like can be integrally formed or formed as a separate body and provided by means such as joining or locking.

  According to a third aspect of the present invention, there is provided a lighting fixture comprising: a fixture main body; a socket device provided in the fixture main body; and the bulb-type fluorescent lamp device according to claim 1 or 2 attached to the socket device. It is characterized by having.

  Since the fluorescent lamp device having the effect described in claim 1 or 2 is provided, it is excellent in light emission and life characteristics, and it is possible to reduce troubles such as maintenance such as replacement of the lamp device.

  According to the first aspect of the present invention, since the electronic component and the cover or the base are connected by the heat conductive material, the heat generated during lighting can be efficiently radiated, so that the temperature of the lighting circuit device or the like can be reduced. It is possible to provide a bulb-type fluorescent lamp device that can reduce the temperature and protect the internal components thermally and mechanically to maintain the performance of the components stably for a long period of time, that is, has excellent light emission characteristics and a long life.

  Moreover, since the partition is provided in the cover, it is possible to suppress the heat conductive material from flowing out and to suppress the use of the heat conductive material more than necessary.

  According to the second aspect of the present invention, a partition having a simple configuration can be easily obtained.

  According to the third aspect of the present invention, since the light bulb-type fluorescent lamp device having the effect of the first or second aspect is provided, the light emission and life characteristics are excellent, and maintenance such as replacement of the lamp device is easy. Lighting equipment can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially sectional front view of a bulb-type fluorescent lamp device L, and FIGS. 2A and 2B are a front view and a bottom view of a cover.

  In the figure, reference numeral 1 denotes a fluorescent lamp, which is a bulb 13 in which three glass tubes 11,... Bent in a substantially U shape are connected in the same circumferential shape through connecting tubes 12,. Have A stem (not shown) provided with an electrode (not shown) made of a filament coil is sealed at the ends of the glass tube 11 at both ends of the bulb 13, and a narrow tube (exhaust pipe) 10 provided on the stem is sealed. It protrudes longer than usual for forming the coldest part from the sealing part. Further, a phosphor film (not shown) is formed on the inner surface of the glass tube bulb 13, and a rare gas such as mercury and argon is sealed therein as a discharge medium.

  A cover 2 is formed of an electrically insulating heat-resistant synthetic resin material such as PBT resin, and has a cylindrical portion 20 on the proximal end side and a dome-shaped portion 21 on the other end side. The base-side cylindrical portion 20 has an outer diameter that is substantially the same as the inner diameter of the shell 81 of the base 8 and has a base fitting insertion portion, and is attached to the outer periphery by screwing an E-type base 8. It is locked and fixed so as not to rotate by punching from the outside (180 degrees apart) and pressing it inward (not shown).

  Further, partitions 31 and 31 are integrally formed in the dome-shaped portion 21 on the other end side, and the partition wall 3 forms a substantially triangular pyramid shape with the outer wall. A holder 6 made of PBT resin or the like to support the fluorescent lamp 1 and to which the lighting circuit device 4 and the globe 5 of the lamp 1 are attached is fixed to the opening 22 of the dome 21 by means such as fitting. .

  Ends of bulbs 13,... Are inserted into loose holes (not shown) formed in the shelf 61 below the holder 6, and the fluorescent lamp 1 is attached via a thermosetting adhesive such as silicone. Bonded and fixed. At this time, the distal end portion of the thin tube 10 protruding from the sealing portion is located in the partition wall 3 formed by the partitions 31 and 31 in the dome-shaped portion 21.

  Further, a circuit board 42 on which circuit components 41,... For high-frequency lighting using a transistor inverter, for example, constituting the lighting circuit device 4 are fixed to the holder 6, and a fluorescent lamp is attached to the circuit board 42. 1 external lead wires 14 and 14 are electrically connected. Further, the lead wire or the external lead wire 14 led out from the lighting circuit device 4 is connected to the shell 81 and the eyelet terminal 83 of the base 8.

  The electronic components 41,... Of the lighting circuit device 4 are heated at, for example, the periphery of the inductance and, for example, silicon is the main component and calcium is added in an amount of 20% by mass or more so as to be in contact with the inner surface of the dome 21. A thermally conductive material 7 is filled. In addition, you may perform filling of this heat conductive substance 7 to several electronic components 41 .... The heat conductive material 7 can be filled by making a through hole in the dome-shaped portion 21 near the filling portion, and through the through hole. The color of the heat conductive material 7 and the cover 2 is the same color such as white. The presence of holes is not noticeable.

  In addition, a globe 5 formed in a mold having one end opened with a glass or synthetic resin material having a light diffusibility and a substantially hemispherical tip so as to cover the fluorescent lamp 3 composed of a plurality of glass tubes 11. Is provided. In this globe 5, the tip of the opening 51 is inserted into an annular portion between the inner wall of the opening 22 of the dome-shaped portion 21 of the cover 2 and the outer periphery of the holder 6 fitted in the opening 22. It is fixed by filling and joining a thermosetting adhesive 9 such as a system or by fitting uneven portions (not shown) formed on both.

  The bulb-type fluorescent lamp device L configured as described above is performed by screwing the base 8 into the spiral groove of the socket device receptacle, and can be turned on by applying a normal rated voltage.

  The bulb-type fluorescent lamp device L is energized, and the internal temperature formed by the cover 2 and the holder 6 increases due to the heat generated by the circuit components 41 of the lighting circuit device 4 and the electrodes in the lamp 1, but is particularly high. An electronic component 41 such as a ballast choke that is heated is coated with a heat conductive material 7, and the generated heat is transmitted to the cover 2 through the heat conductive material 7 and is radiated from the outer surface of the cover 2. The temperature can be reduced.

  Further, when the heat conductive material 7 is coated on the electronic component 41 such as the ballast choke or after the heat conductive material 7 is scattered or discharged after the coating, the tip of the thin tube 10 of the fluorescent lamp 1 is located. Since the portion is surrounded by the partitions 31 and 31 and the outer wall, the heat conductive material 7 is prevented from entering the partition wall 3 beyond the partitions 31 and 31.

  Therefore, since the heat conductive material 7 is regulated by the partition walls 3, even a small amount of the heat conductive material 7 can ensure contact. Further, the thin tube 10 comes into contact with the heat conductive material 7 by suppressing the outflow of the heat conductive material 7 such that the thin tube 10 is buried in the heat conductive material 7 or the heat conductive material 7 adheres. Therefore, even if the thermal conductive material 7 is thermally expanded due to the influence of heat during lighting, it is possible to suppress damage to the thin tube 10 due to the pressure.

  Further, when amalgam or the like is enclosed in the thin tube 10 of the lamp 1, the thin tube 10 is not affected by the heat of conduction of the heat conductive material 7, so that an optimum mercury vapor pressure can be obtained.

  Further, in the substantially triangular pyramid-shaped partition wall 3 in which the tip of the thin tube 10 surrounded by the partitions 31 and 31 and the outer wall is located, the temperature rise is lower than that in the cover 2 because the heat is blocked by the partition wall 3. Because of this tendency, the coldest part can be easily secured by extending the space surrounded by the narrow tube 10 and the partition wall 3.

  Therefore, the desired light emission characteristics can be maintained, and the thin tube 10 having a low strength is easily broken. However, since the thin tube 10 is located in the partition wall 3, it is protected without coming into contact with other articles.

  In the light bulb type fluorescent lamp device according to the present invention, the partition wall 3 is not limited to the one that surrounds the narrow tube 100 as in the above embodiment, but the electronic component 41 of the lighting circuit device 4 is surrounded by the partition wall 3 to generate heat from other components. It may be effective to block thermal effects such as receiving heat or applying heat to other components.

  Further, at this time, the plurality of electronic components 41,... May be individually shielded or the plurality may be integrally shielded, and the dome-shaped portion 21 of the partition wall 3 is provided with a ventilation hole for ventilation. By providing, the cooling effect can be further enhanced.

  3 to 5 show other embodiments of the present invention, in which the same parts as those in FIGS.

  FIG. 3A is a front view of a circuit board 42 (which is supported by the holder 6 and is a part of the holder) on which the electronic components 41 of the lighting circuit device 4 are provided, and FIG. Is a top view. In this case, the circuit board 42 is provided with a partition wall 3 formed by a single plate-like partition 31 bent in a substantially U shape so as to cover the thin tube. In the case of FIG. 3 as well, the partition wall 3 is surrounded by the plate-like bodies 31 and 31 and the dome-shaped portion 21 of the cover 2, and the distal end side of the thin tube 10 is located inside, so that the same function and effect as in the above embodiment are obtained. Present.

  4A is a front view of the holder 6, and FIG. 4B is a top view. In this case, the partition 6 formed of two plate-like bodies 31 and 31 is provided on the holder 6 so as to cover the thin tubes. ing. FIG. 5 is a front view of the narrow tube 10 protruding from the holder 6. In this case, a hollow tube 32 made of silicon or the like is placed on the tip of the thin tube to form the partition wall 3. 4 and 5 also exhibit the same operational effects as the embodiment shown in FIGS.

  3 to 5, the partition wall 3 surrounds the thin tube 10. However, the present invention is not limited to the thin tube 10 but can be applied to the partition wall 3 that surrounds the electronic components 41... The same effect as the form is achieved.

  The fluorescent lamp device L can be used as appropriate by being mounted on a general-purpose socket device such as a lighting fixture used for lighting a light bulb or the like depending on the type of the attached base, and the lighting fixture is also limited. Is not to be done.

  In addition, this invention is not limited to what was described in the said embodiment. For example, the configuration and shape of the holder, cover, globe, or mutual member engaging means for supporting the lamp and the lighting circuit device may be variously modified according to the shape of the lamp, the parts to be incorporated, and the like. Further, in a lamp device having a high temperature rise, a heat radiating vent hole may be formed in a cover or the like.

  In addition, by forming a photocatalyst film made of titanium oxide or the like directly or via an ultraviolet absorbing film on the surface of the cover, globe, holder, lighting circuit device circuit board or fluorescent lamp shown in the above embodiment, Adsorbs and decomposes the pollutant gas generated inside the light bulb device to reduce the emission of pollutant gas to the outside.It disassembles dirt caused by organic substances attached to the surfaces of various members to prevent fouling and disinfect and disinfect. An odor effect can be performed.

  Further, the globe is not essential, and a lamp device in which a fluorescent lamp without the globe is exposed may be used.

It is a partial cross section front view which shows the lightbulb-type fluorescent lamp apparatus of embodiment of this invention. FIGS. 1A and 1B are a front view and a bottom view of the cover in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a circuit board with which the electronic component of the lighting circuit device of embodiment of this invention is provided, Comprising: Fig. (A) is a front view, Fig. (B) is a top view of Fig. (A). BRIEF DESCRIPTION OF THE DRAWINGS It is a holder provided with the lighting circuit device and fluorescent lamp of embodiment of this invention, Comprising: The figure (a) is a front view, The figure (b) is a top view. It is a front view of the thin tube which protruded from the holder provided with the lighting circuit device and fluorescent lamp of embodiment of this invention, and a holder.

Explanation of symbols

  L: Bulb-type fluorescent lamp device, 1: Fluorescent lamp, 11: Glass tube, 13: Glass tube bulb, 2: Cover, 20: Cylindrical part, 21: Domed part, 3: Bulkhead, 31: Bulkhead, 4: Lighting Circuit device, 41: electronic component, 42: circuit board, 5: globe, 6: holder, 7: thermally conductive material, 8: base,

Claims (3)

A fluorescent lamp having a bent glass tube bulb, with a narrow tube at the end of the bulb;
A holder supporting the end side of the fluorescent lamp;
A lighting circuit device having a circuit board to which an electronic component that is supported by the holder and electrically connected to the fluorescent lamp is connected;
A cover having a base attached to one side and the holder attached to the other side and housing the lighting circuit device therein;
A partition provided within the cover so as to substantially surround at least a part of the specific electronic component and / or the thin tube constituting the lighting circuit device;
A thermally conductive material interposed in contact with at least a part of a specific electronic component and the inner surface of the cover or base;
A bulb-type fluorescent lamp device characterized by comprising:   2. The bulb-type fluorescent lamp device according to claim 1, wherein the partition wall is formed integrally or integrally with a cover or a holder. An instrument body;
A socket device provided on the instrument body;
The bulb-type fluorescent lamp device according to claim 1 or 2 mounted on the socket device;
The lighting fixture characterized by comprising.

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