JP2004030963A - Bulb-type fluorescent lamp - Google Patents

Abstract

Provided is a bulb-type fluorescent lamp (11) capable of reducing the diameter of an opening edge portion (22) of a globe (14) and reducing the size.
An arc tube (16) and a lighting circuit (17) are attached to a partition (15), and a partition (15) and a globe (14) are attached to a cover (12) having a base (13). The partition body 15 is provided with a mounting hole 30 for mounting the arc tube 16 between the central portion 28 and the outer peripheral portion 29, and the central portion 28 is projected toward the arc tube 16 with respect to the outer peripheral portion 29, and A step 31 is provided between the outer peripheral portion 29 and the outer peripheral portion 29. The opening edge 22 of the glove 14 is arranged outside the step 31 of the partition 15 and attached to the cover 12. The opening edge 22 of the globe 14 is made smaller in diameter than the case where the opening edge 22 of the globe 14 is arranged on the outer periphery of the partition body 15, and the bulb-type fluorescent lamp 11 is made smaller.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a miniaturized compact fluorescent lamp.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as described in Japanese Patent Application Laid-Open No. 11-353911, for example, a bulb-shaped fluorescent lamp is formed by sequentially connecting a plurality of substantially U-shaped tubes to form a bulb having a bent discharge path. A light emitting tube with electrodes sealed at both ends of the bulb is provided, and the end of each bulb of the light emitting tube is inserted into a mounting hole of a resin partition plate, and is adhered and fixed, and a lighting circuit connected to the light emitting tube is provided. The mounted circuit board is held in a partition body, the circuit board held in the partition body is housed in a resin cover having a base, the partition body is attached to the cover, and the glove containing the arc tube is used as the cover. By mounting, it is formed in a shape similar to an incandescent lamp using an E26 type base.
[0003]
The partition body has a tubular portion and a partition plate formed in a flat plate shape at one end of the tubular portion, and a mounting hole for inserting an arc tube is formed inside the partition plate. The glove has an opening into which the arc tube is inserted, and the opening edge, which is the edge of the opening, is disposed between the outside of the cylindrical portion, which is the maximum outer diameter portion of the partition, and the cover. It is fixed with an adhesive.
[0004]
[Problems to be solved by the invention]
In the above-mentioned conventional bulb-type fluorescent lamp, only a bulb-type fluorescent lamp having a shape whose height and width are slightly larger than those of the incandescent bulb using the E26 type base is realized. Since a bulb-type fluorescent lamp having substantially the same dimensions as the above has not yet been realized, it is necessary to further reduce the size of the envelope including the globe and the cover. On the other hand, in recent years, with the spread of miniature bulbs such as mini krypton using an E17 type base, there has been a demand for further miniaturization of bulb-type fluorescent lamps. In addition, it is necessary to reduce the size of the envelope including the glove and the cover.
[0005]
However, in the structure of the conventional bulb-type fluorescent lamp, since the opening edge of the glove is arranged outside the cylindrical portion which is the maximum outer diameter portion of the partition, the outer diameter of the opening edge of the globe depends on the partition. There is a problem that the size of the globe cannot be sufficiently reduced due to restrictions, and the compact fluorescent lamp cannot be reduced in size.
[0006]
The present invention has been made in view of such a point, and an object of the present invention is to provide a light bulb-shaped fluorescent lamp in which the opening edge of the globe can be reduced in size and downsized.
[0007]
[Means for Solving the Problems]
The bulb-type fluorescent lamp according to claim 1, wherein: an arc tube; a lighting circuit for lighting the arc tube; a partition provided with a mounting hole for mounting the arc tube; A cover attached to the cover; a glove having an opening into which the arc tube is inserted and an opening edge around the periphery of the opening, the opening edge facing the arc tube and attached to the cover; Is provided.
[0008]
In this configuration, since the opening edge of the glove is attached to the cover so as to face the arc tube, the opening edge of the glove is reduced in diameter compared to the case where the opening edge of the glove is arranged on the outer periphery of the partition. Thus, it is possible to reduce the size of the compact fluorescent lamp.
[0009]
A bulb-type fluorescent lamp according to claim 2, comprising: an arc tube; a lighting circuit for lighting the arc tube; a central portion and an outer peripheral portion, and a mounting hole for mounting the arc tube between the central portion and the outer peripheral portion. A partition provided and provided with a stepped portion whose central portion protrudes toward the arc tube with respect to the outer peripheral portion; a cover accommodating a lighting circuit and having the partition attached; a base attached to the cover; A glove having an opening into which the arc tube is inserted and an opening edge around the periphery of the opening, wherein the opening edge is arranged outside the step of the partition and attached to the cover. It is.
[0010]
In this configuration, a mounting hole for mounting an arc tube is provided between the central portion and the outer peripheral portion of the partition body, and a step portion is provided in which the central portion projects toward the arc tube with respect to the outer peripheral portion. Since the opening edge of the glove is arranged outside the step and attached to the cover, the opening edge of the glove is reduced in diameter compared to the case where the opening edge of the glove is arranged on the outer periphery of the partition, and the bulb shape is reduced. The size of the fluorescent lamp can be reduced. In addition, since the central portion of the partition body projects toward the arc tube with respect to the outer peripheral portion, the light extraction efficiency of the arc tube from the outer peripheral portion side of the partition body is ensured, and the arc tube with respect to the central portion of the partition body. As a result, the strength of the adhesive fixing is secured.
[0011]
According to a third aspect of the present invention, there is provided the bulb-type fluorescent lamp according to the first or second aspect, wherein the end surface of the opening edge of the globe is restricted in position by the outer peripheral portion of the partition.
[0012]
In this configuration, since the position of the end surface of the opening edge of the glove can be regulated by the outer peripheral portion of the partition body, the positioning of the glove at the time of assembly is facilitated, and the occurrence of the inclination of the glove is prevented.
[0013]
According to a fourth aspect of the present invention, there is provided the bulb-type fluorescent lamp according to any one of the first to third aspects, wherein the inside of the opening edge of the globe is regulated by the arc tube.
[0014]
In this configuration, since the position of the inside of the opening edge of the glove can be regulated by the arc tube, the positioning of the glove at the time of assembly is facilitated, and the occurrence of displacement of the glove is prevented.
[0015]
According to a fifth aspect of the present invention, there is provided the bulb-type fluorescent lamp according to any one of the first to fourth aspects, wherein the opening edge of the globe and the arc tube are bonded with an adhesive.
[0016]
In this configuration, since the opening edge of the globe and the arc tube are adhered with the adhesive, the heat of the arc tube is efficiently transmitted to the globe through the adhesive, and is radiated.
[0017]
According to a sixth aspect of the present invention, there is provided the bulb-type fluorescent lamp according to any one of the first to fifth aspects, wherein a stopper for regulating an insertion position of the arc tube is provided in the mounting hole of the partition. .
[0018]
In this configuration, since the stopper for regulating the insertion position of the arc tube is provided in the mounting hole of the partition, the positioning of the arc tube and the partition at the time of assembling becomes easy, and the light emitting tube and the partition are separated. The occurrence of displacement is prevented.
[0019]
A bulb-type fluorescent lamp according to a seventh aspect is the bulb-type fluorescent lamp according to any one of the first to sixth aspects, wherein a central portion of the partition body is provided with metal and an outer peripheral portion is provided with resin.
[0020]
In this configuration, since the central portion of the partition body is provided with metal, the influence of heat from the arc tube and deterioration due to ultraviolet rays is prevented, and heat is efficiently transmitted from the partition body to the cover side, so that the partition is provided. The heat transmitted from the body to the lighting circuit is suppressed, and the temperature rise of the lighting circuit is reduced. Further, since the outer peripheral portion of the partition body is provided with a resin, it is possible to hold the lighting circuit and attach the lighting circuit to the cover.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0022]
1 to 6 show an embodiment, FIG. 1 is a sectional view of a bulb-shaped fluorescent lamp, FIG. 2 is a side view of a partially cut-away bulb-shaped fluorescent lamp, and FIG. 3 is a partition of the bulb-shaped fluorescent lamp. FIG. 4 is a sectional view taken along line AA of FIG. 3, FIG. 5 is a plan view of an arc tube of the bulb-type fluorescent lamp, and FIG. 6 is a development view of the arc tube and the circuit board of the bulb-type fluorescent lamp.
[0023]
1 and 2, reference numeral 11 denotes a bulb-shaped fluorescent lamp. The bulb-shaped fluorescent lamp 11 is attached to an envelope having a cover 12, a base 13 and a globe 14, and a partition 15 and is housed in the envelope. The light-emitting tube 16 and the lighting circuit 17 are provided to constitute a bulb-type fluorescent lamp device. The envelope has an outer shape similar to the standard size of a small incandescent light bulb such as a mini krypton using the E17 type base 13, and a dimension in a height direction from the base 13 to the globe 14 is 75 to 105 mm. In the present embodiment, the width is about 81 mm, and the dimension in the width direction corresponding to the maximum diameter portion of the globe 14 is 35 to 45 mm, and in the present embodiment, it is about 45 mm. Hereinafter, one end of the cover 12, that is, the base 13 side, will be described as an upper side, and the other end side, that is, the globe 14 and the arc tube 16 will be described as a lower side.
[0024]
The cover 12 is made of, for example, a white heat-resistant synthetic resin such as polybutylene terephthalate (PBT) and is formed in a substantially cylindrical shape that expands below the arc tube 16 side.
[0025]
The base 13 is an E17 type of Edison type, which is placed on the upper end of the cover 12 after wiring with the lighting circuit 17, and is fixed with an adhesive or a caulking.
[0026]
The globe 14 is formed of a material such as transparent or light diffusing glass or synthetic resin, and has a maximum diameter of 35 to 45 mm and is formed in a substantially spherical shape similar to the shape of a glass bulb of a mini krypton type bulb. . An opening 21 is formed in a part of the glove 14, and an opening edge 22 around the opening 21 is fitted into the cover 12, and is adhered and fixed with an adhesive 23 such as a silicone resin. The light diffusing property of the glove 14 is milky white or is formed by sandblasting the inner surface or the outer surface of the glove 14, so that the light distribution in the horizontal direction can be made uniform. Further, the uniformity of luminance can be improved by combining another member such as a diffusion film, or the globe 14 itself can be omitted.
[0027]
The partition body 15 is fitted and mounted in the opening at the lower end of the cover 12, and has a partition plate portion 26 and an annular portion 27 formed on the periphery of the partition plate portion 26, for example, polybutylene. It is integrally formed of a heat-resistant synthetic resin material such as terephthalate (PBT).
[0028]
As shown in FIGS. 1 to 4, the partition plate portion 26 of the partition body 15 has a central portion 28 and an outer peripheral portion 29 at the periphery of the central portion 28, and between the central portion 28 and the outer peripheral portion 29. A pair of mounting holes 30 through which the arc tube 16 is inserted and mounted are formed, and a central portion 28 projects toward the distal end side of the arc tube 16 with respect to the outer peripheral portion 29 so that a step is formed between the central portion 28 and the outer peripheral portion 29. A part 31 is formed. Each of the mounting holes 30 has a plurality of bulb fitting portions 32 into which a plurality of bulbs of the arc tube 16 are inserted and fitted, and these plurality of bulb fitting portions 32 are formed to communicate with each other. The inner surface of the annular portion 27 has a stepped shape that regulates and positions the insertion position by contacting the end of each bulb of the arc tube 16 inserted into each bulb fitting portion 32 opposite to each bulb fitting portion 32. A stopper 33 is formed.
[0029]
The outer surface of the annular portion 27 of the partition body 15 is formed to be inclined so as to be able to abut and fit along the inside of the cover 12, and the outer surface of the annular portion 27 has a plurality of unillustrated surfaces provided on the inner surface of the cover 12. A plurality of locking recesses 34 that engage with the locking claws are formed, and a plurality of ribs 35 that hold the circuit board of the lighting circuit 17 are protruded from the inner surface of the annular portion 27.
[0030]
The arc tube 16 is inserted into the mounting hole 30 of the partition body 15, and is fixedly adhered by an adhesive 23 such as a silicone resin. At this time, the insertion amount of the arc tube 16 into the outer peripheral portion 29 of the partition body 15 is small, the light extraction efficiency of the arc tube 16 from the outer peripheral portion 29 side of the partition body 15 is secured, and the central portion 28 of the partition body 15 is The insertion amount of the arc tube 16 into the central portion 28 of the partition 15 increases, and the fixing strength by adhesion with the adhesive 23 is secured.
[0031]
As shown in FIGS. 1, 2, 5 and 6, the arc tube 16 has a bulb 39 made of glass, and for example, a three-wavelength phosphor is formed on the inner surface of the bulb 39. A sealed gas containing a rare gas such as argon or mercury is sealed inside the valve body 39, and a pair of electrodes 40 are sealed at both ends of the valve body 39 by a pinch seal.
[0032]
The valve body 39 has at least three U-shaped bent valves 41, 42, 43, and these U-shaped bent valves 41, 42, 43 are juxtaposed so that their U-shaped surfaces face each other in parallel. A pair of electrodes 40 is disposed at each end of the U-shaped bent bulbs 41 and 43 on both sides located on a diagonal line of the arc tube 16.
[0033]
Each of the U-shaped bent valves 41, 42, and 43 is made of, for example, a glass having an outer diameter d of 5 to 10 mm, about 6.5 mm in the present embodiment, and an inner diameter of about 5.2 mm in the present embodiment. Is formed in a substantially U-shape having a top portion that is curved at an intermediate portion. That is, each of the U-shaped bent valves 41, 42, and 43 includes a bent portion 44 that bends and a pair of straight pipe portions 45 that are continuous with the bent portion 44 and that are parallel to each other. The height H1 of the central U-shaped bent valve 42 is 30 to 45 mm, preferably 35 to 40 mm, and the height H2 of the U-shaped bent valves 41 and 43 on both sides is 25 to 40 mm, preferably 30 to 35 mm, and H1> H2. have. The height H1 of the central U-shaped bent valve 42 and the height H2 of the U-shaped bent valves 41, 43 at both ends mean the length from the valve sealing end to the top of the bent portion 44.
[0034]
The ends of the U-shaped bent bulbs 41 and 43 on both sides on which the electrode 40 is not sealed and the ends of the central U-shaped bent bulb 42 are sequentially connected by a communication pipe 46 so that the discharge path length is 120 to 200 mm. One continuous discharge path 47 is formed. Each communication pipe 46 is formed by heating and melting the vicinity of the connected end of each of the U-shaped bent valves 41, 42, and 43, and then connecting the openings formed by blowing.
[0035]
Each end of each U-shaped bent valve 41, 42, 43 is pinched by heating and melting each end of each U-shaped bent valve 41, 42, 43, that is, a pinch sealed by a pinch seal. A seal portion 48 is formed.
[0036]
Each electrode 40 sealed with a pinch seal at one end located at both ends of the arc tube 16 with the U-shaped bent bulbs 41, 43 on both sides has a filament coil 51, and the filament coil 51 is a pair (two). It is supported by linear wells 52. Each of the wells 52 is led out of the ends of the U-shaped bent valves 41, 43 on both sides through, for example, a dumet wire sealed at the ends of the U-shaped bent valves 41, 43 on both sides by a pinch seal. It is connected to a wire 53 connected to the lighting circuit 17.
[0037]
At each end of the U-shaped bent valves 41 and 43 on both sides on which the electrodes 40 are not sealed, and at one end of the center U-shaped bent valve 42, a cylindrical thin tube which is sealed by a pinch seal and is also called an exhaust pipe. 54 and 55 are protruded in a communication state. These small tubes 54 and 55 are sequentially sealed by fusing during the manufacturing process of the valve body 39, and the inside of the valve body 39 is exhausted through an unsealed part of each of the small tubes 54 and 55, and sealed. After the gas has been filled and replaced, the gas is sealed by fusing out an unsealed part of each of the small tubes 54 and 55.
[0038]
A main amalgam 56 as an amalgam is sealed in the thin tube 55 of the central U-shaped bent valve 42 when the thin tube 55 is sealed. The main amalgam 56 is an alloy composed of bismuth, indium and mercury, is formed in a substantially spherical shape, and has an action of controlling the mercury vapor pressure in the valve body 39 to an appropriate range. In addition, as the main amalgam 56, a material formed of an alloy in which tin, lead, and the like are combined in addition to bismuth and indium may be used. An auxiliary amalgam 57 having the same mercury vapor pressure characteristics as the main amalgam 56 is attached and sealed to the wells 52 of the electrodes 40 of the U-shaped bent valves 41 and 43 at both ends. Further, an auxiliary amalgam 58 having a mercury vapor pressure characteristic similar to that of the main amalgam 56 and the auxiliary amalgam 57 is enclosed by a support wire 59 at the end of the central U-shaped bent valve 42 on the side where the thin tube 55 is not sealed. ing.
[0039]
Each end of each of the U-shaped bent bulbs 41, 42, 43 of the arc tube 16 is inserted into each of the mounting holes 30 of the partition 15, and an adhesive 23 such as a silicone resin is filled from the inside of the partition 15. Thereby, the ends of the U-shaped bent valves 41, 42, 43 and the partition body 15 are fixed to each other. At this time, the insertion amount of the arc tube 16 into the outer peripheral portion 29 of the partition body 15 is small, the light extraction efficiency of the arc tube 16 from the outer peripheral portion 29 side of the partition body 15 is secured, and the central portion 28 of the partition body 15 is The insertion amount of the arc tube 16 into the central portion 28 of the partition 15 increases, and the fixing strength by adhesion with the adhesive 23 is secured.
[0040]
As shown in FIG. 5, three U-shaped bent valves 41, 42, and 43 having a tube outer diameter d of 5 to 10 mm were connected in parallel so that their U-shaped surfaces face each other. In the arc tube 16, the width dimension a of the central U-shaped bent valve 42 in the direction intersecting the bulb juxtaposition direction is 30 to 35 mm, the width dimension of the arc tube 16 in the bulb juxtaposition direction is b, and the U-shaped The width dimension of the bent valves 41 and 43 in the direction intersecting the direction in which the valves are arranged is c.
[0041]
For example, the width dimension a of the central U-shaped bent bulb 42 is about 32 mm, the width dimension c of the U-shaped bent bulbs 41 and 43 on both sides is about 26 mm, and the width dimension b of the arc tube 16 is about 26 mm. ing. Corresponding to these width dimensions, the tube length in the height direction between the bent portion 44 of the central U-shaped bent valve 42 and the end portion is approximately 37 mm, and the bent portions 44 of the U-shaped bent valves 41 and 43 on both sides and each straight portion. The tube length in the height direction from the end of the tube portion 45 is formed to be about 34 mm. At this time, the ends of the U-shaped bent valves 41 and 43 on both sides are arranged closer to the peripheral edge of the partition body 15 than the end of the central U-shaped bent valve 42.
[0042]
The height H1 of the central U-shaped bent valve 42 is 30 to 45 mm, the height H2 of the U-shaped bent valves 41 and 43 on both sides is 25 to 40 mm, and H1> H2, and the discharge path length is 120 to 200 mm. In a certain arc tube 16, when the total luminous flux when the lamp is lit at a lamp power of 7 to 12 W is 450 lm or more and the lamp efficiency is 45 lm / W or more, b and c are as follows.
0.9a ≧ b ≧ 0.75a
0.9a ≧ c ≧ 0.75a
The following relationship is advantageous in terms of manufacturing, and is also suitable in terms of miniaturization.
[0043]
In the arc tube 16 configured in such a numerical relationship, since the light distribution in the horizontal direction is likely to be uniform, luminance unevenness is unlikely to occur, and both sides along the curvature of the bent portion 44 of the central U-shaped bent valve 42. Since the tops of the bent portions 44 of the U-shaped bent valves 41 and 43 are arranged stepwise, the rotational symmetry is excellent. Further, in such a configuration of the bent portion 44, as can be seen from FIGS. 1 and 2, when the globe 14 having a substantially spherical end is attached, the distance between the bent portion 44 and the inner surface of the glove 14 is reduced. It is easy to make them substantially uniform, and uneven brightness can be suppressed.
[0044]
In this manner, the arc tube 16 has a lamp power (power input between the electrodes 40 of the arc tube 16) of 7 to 7, appropriately considering the discharge path length, the tube outer diameter, the phosphor layer, the gas type, the gas pressure, and the like. When lit at 12 W, the total luminous flux is 450 lm or more, and the lamp efficiency is 45 lm / W or more, more preferably 50 lm / W or more.
[0045]
The lighting circuit 17 includes a substantially disk-shaped circuit board 61 disposed in the cover 12. One side of the circuit board 61 on the base 13 side, or both sides of the base 13 and the arc tube 16 side, A plurality of electric components 62 are mounted to constitute an inverter circuit for lighting the arc tube 16 at high frequency, that is, a high-frequency lighting circuit. The circuit board 61 is reduced in size to have a maximum diameter of 30 to 40 mm, and is fitted and arranged in the partition body 15 such that the center thereof substantially coincides with the center of the arc tube 16. The circuit board 61 fitted to the partition 15 is positioned in contact with the rib 35 of the partition 15.
[0046]
When the electric components 62 are mounted on both sides of the circuit board 61, the electric components 62 such as a large electrolytic capacitor and a film capacitor which are relatively vulnerable to heat are disposed on the base 13 side, and the electric components 62 are disposed on the arc tube 16 side. A chip-like electrical component 62 such as a rectifier, a diode bridge, and other RECs, transistors, and resistors is relatively resistant to heat and has a small height.
[0047]
The circuit board 61 is formed with a through hole 63 through which the thin tube 55 in which the main amalgam 56 of the light emitting tube 16 is sealed is inserted. On the upper surface side of the circuit board 61, a side portion of the through hole 63 through which the thin tube 55 is inserted is formed. A plurality of switching elements 64 such as a field effect transistor (FET) are arranged. That is, since the main amalgam 56 and the plurality of switching elements 64 in the narrow tube 55 are arranged close to each other, the switching elements 64 which are relatively easy to generate heat among the circuit components when the light bulb-shaped fluorescent lamp 11 is started up. The main amalgam 56 is quickly heated by the heat, and the mercury vapor pressure in the arc tube 16 is rapidly increased, so that the rising characteristics of the luminous flux can be improved.
[0048]
Then, at the time of assembling the bulb-type fluorescent lamp 11, the ends of the bulbs 41, 42, 43 of the arc tube 16 are inserted into the mounting holes 30 of the partition 15, and the adhesive 23 is filled from inside the partition 15. The partition 15 and the arc tube 16 are bonded and fixed. At this time, since the stopper 33 for regulating the insertion position of the arc tube 16 is provided in the mounting hole 30 of the partition member 15, the positioning between the partition member 15 and the arc tube 16 can be easily performed, and the partition member 15 and the arc tube 16 can be easily positioned. Can be prevented from occurring. Further, since the central portion 28 of the partition body 15 projects toward the arc tube 16 with respect to the outer peripheral portion 29, the light extraction efficiency of the arc tube 16 from the outer peripheral portion 29 side of the partition member 15 can be ensured, and the partition body 15 can be secured. The insertion amount of the arc tube 16 into the central portion 28 of the fifteen increases, and the strength can be ensured by adhesive fixing.
[0049]
The partition 15 to which the arc tube 16 is attached and the circuit board 61 electrically connected to the arc tube 16 is fitted and fixed in the opening of the cover 12. As a result, the step 31 of the partition plate 15 and the outer surface of the arc tube 16 face the inside of the opening edge of the cover 12, and between the cover 12 and the step 31 of the partition plate 15 and the arc tube 16. A space is formed in the fitting portion 66 into which the opening edge portion 22 of the glove 14 is fitted and inserted.
[0050]
The fitting portion 66 is filled with the adhesive 23, and the opening edge 22 of the glove 14 is fitted and inserted into the fitting portion 66 while enclosing the arc tube 16 through the opening 21, and the opening edge 22 of the glove 14 is bonded. The adhesive 23 is adhered and fixed to the cover 12, the step 31 of the partition plate 15, and the arc tube 16 forming the fitting portion 66 by the agent 23. At this time, since the position of the inside of the opening edge 22 of the globe 14 can be regulated by the step 31 of the partition plate 15 and the arc tube 16, the positioning of the globe 14 can be facilitated and the occurrence of displacement of the globe 14 can be prevented. Further, since the position can be regulated by bringing the end surface of the opening edge portion 22 of the glove 14 into parallel contact with the outer peripheral portion 29 of the partition member 15, the positioning of the glove 14 can be facilitated and the inclination of the globe 14 can be prevented. .
[0051]
A mounting hole 30 for mounting the arc tube 16 is provided between the central portion 28 and the outer peripheral portion 29 of the partition body 15, and a step portion 31 is provided in which the central portion 28 protrudes toward the arc tube 16 with respect to the outer peripheral portion 29. Since the opening edge 22 of the glove 14 is disposed outside the stepped portion 31 of the partition 15 and attached to the cover 12, the opening edge 22 of the glove 14 is disposed on the outer periphery of the partition 15. The opening edge 22 of the globe 14 can be reduced in diameter. Therefore, the light bulb shaped fluorescent lamp 11 can be a light source of substantially the same size with a light output equivalent to that of a small incandescent light bulb using the E17 base 13.
[0052]
Further, since the opening edge portion 22 of the globe 14 and the arc tube 16 are bonded with the adhesive 23, the heat of the arc tube 16 can be efficiently transmitted to the globe 14 through the adhesive 23 and can be radiated.
[0053]
Next, another embodiment is shown in FIG. 7 and FIG. 8, FIG. 7 is a front view of a partition body of the bulb-type fluorescent lamp, and FIG. 8 is a cross-sectional view along BB of FIG.
[0054]
A metal partition plate 71 is used for the central portion 28 of the partition body 15, and the partition plate 71 is integrally formed with the resin outer peripheral portion 29 and the annular portion 27 by, for example, insert molding. The partition plate 71 is made of a metal material having excellent heat conductivity, such as aluminum, and is formed on both sides of the partition plate 71 in a shape corresponding to each mounting hole 30.
[0055]
As described above, since the central portion 28 of the partition body 15 is formed of the metal partition plate 71, the influence of heat and ultraviolet rays from the arc tube 16 can be prevented from being deteriorated, and the efficiency of the partition body 15 from the partition body 15 toward the cover 12 can be reduced. The heat is well transmitted, the heat transmitted from the partition body 15 to the lighting circuit 17 is suppressed, and the temperature rise of the lighting circuit 17 can be reduced. Further, since the outer peripheral portion 29 of the partition body 15 is provided with a resin, the lighting circuit 17 can be held on the circuit board 61 and attached to the cover 12.
[0056]
Alternatively, the opening edge 22 of the glove 14 may be directly opposed to the arc tube 16 or may be attached to the cover 12 with the adhesive 23 interposed therebetween, so that the opening edge 22 of the globe 14 is formed on the outer periphery of the partition body 15. The diameter of the opening edge 22 of the globe 14 can be reduced as compared with the case where the globe 14 is arranged, and the bulb-type fluorescent lamp 11 can be reduced in size. In this case, it is preferable that the partition body 15 be provided with the stepped portion 31 in that the position of the opening edge portion 22 of the glove 14 is regulated and attached to the cover 12. Fourteen open edges 22 can be attached to the cover 12.
[0057]
【The invention's effect】
According to the bulb-type fluorescent lamp of the first aspect, since the opening edge of the glove is attached to the cover so as to face the arc tube, the glove is compared with the case where the opening edge of the glove is arranged on the outer periphery of the partition. Can be reduced in diameter, and the bulb-type fluorescent lamp can be reduced in size.
[0058]
According to the bulb-type fluorescent lamp of the second aspect, a mounting hole for mounting an arc tube is provided between the central portion and the outer peripheral portion of the partition body, and the step portion whose central portion protrudes toward the arc tube with respect to the outer peripheral portion. Is provided, and the opening edge of the glove is arranged outside the step of the partition body and attached to the cover, so that the opening edge of the glove is compared with the case where the opening edge of the glove is arranged on the outer periphery of the partition body. Can be reduced in size, and the compact fluorescent lamp can be reduced in size. In addition, since the central portion of the partition protrudes toward the arc tube with respect to the outer peripheral portion, the light extraction efficiency of the arc tube from the outer peripheral portion of the partition can be secured, and the arc tube with respect to the central portion of the partition body can be secured. The insertion amount increases, and the strength can be ensured by adhesive fixing.
[0059]
According to the light bulb shaped fluorescent lamp of the third aspect, in addition to the effect of the light bulb shaped fluorescent lamp of the first or second aspect, the position of the end surface of the opening edge of the glove can be regulated by the outer peripheral portion of the partition body, so that assembly is possible. The positioning of the glove at the time can be facilitated, and the occurrence of inclination of the glove can be prevented.
[0060]
According to the bulb-type fluorescent lamp according to the fourth aspect, in addition to the effect of the bulb-type fluorescent lamp according to any one of the first to third aspects, the inside of the opening edge of the glove can be regulated by the arc tube, so that assembly is possible. The positioning of the glove at the time can be easily performed, and the occurrence of the displacement of the glove can be prevented.
[0061]
According to the bulb-type fluorescent lamp of the fifth aspect, in addition to the effect of the bulb-type fluorescent lamp of any one of the first to fourth aspects, the opening edge of the globe and the arc tube are adhered with an adhesive. In addition, the heat of the arc tube can be efficiently transmitted to the glove through the adhesive to release the heat.
[0062]
According to the bulb-type fluorescent lamp of the sixth aspect, in addition to the effect of the bulb-type fluorescent lamp of any one of the first to fifth aspects, a stopper for regulating the insertion position of the arc tube is provided in the mounting hole of the partition. Therefore, it is possible to easily position the arc tube and the partition at the time of assembling, and it is possible to prevent the displacement between the arc tube and the partition.
[0063]
According to the bulb-type fluorescent lamp according to the seventh aspect, in addition to the effect of the bulb-type fluorescent lamp according to any one of the first to sixth aspects, the central portion of the partition body is provided with a metal, so that the heat from the arc tube is generated. And the effect of deterioration due to ultraviolet rays and ultraviolet rays can be prevented, heat can be efficiently transmitted from the partition body to the cover side, heat transmitted from the partition body to the lighting circuit can be suppressed, and a rise in the temperature of the lighting circuit can be reduced. In addition, since the outer peripheral portion of the partition body is provided with resin, the lighting circuit can be held and attached to the cover.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a compact fluorescent lamp showing an embodiment of the present invention.
FIG. 2 is a side view in which a part of the bulb-type fluorescent lamp is cut away.
FIG. 3 is a front view of a partition body of the bulb-type fluorescent lamp.
FIG. 4 is a sectional view taken along line AA of FIG. 3;
FIG. 5 is a plan view of a light emitting tube of the light bulb-type fluorescent lamp according to the first embodiment.
FIG. 6 is a development view of a light emitting tube and a circuit board of the bulb-type fluorescent lamp.
FIG. 7 is a front view of a partition of a bulb-type fluorescent lamp showing another embodiment of the present invention.
FIG. 8 is a sectional view taken along line BB of FIG. 7;
[Explanation of symbols]
11 Bulb-type fluorescent lamp
12 Cover
13 base
14 gloves
15 Partition body
16 arc tube
17 Lighting circuit
21 Opening
22 Opening edge
23 Adhesive
28 Central part
29 Outer circumference
30 mounting holes
31 Step
33 Stopper

Claims (7)

An arc tube;
A lighting circuit for lighting an arc tube;
A partition provided with a mounting hole for mounting an arc tube;
A cover containing a lighting circuit and a partition attached;
A base attached to the cover;
A glove having an opening into which the arc tube is inserted and an opening edge around the periphery of the opening, the opening edge being attached to the cover so as to face the arc tube;
A bulb-type fluorescent lamp comprising: An arc tube;
A lighting circuit for lighting an arc tube;
A partition having a central portion and an outer peripheral portion, wherein a mounting hole for mounting an arc tube is provided between the central portion and the outer peripheral portion, and a step portion is provided in which the central portion projects toward the arc tube with respect to the outer peripheral portion. With the body;
A cover containing a lighting circuit and a partition attached;
A base attached to the cover;
A glove having an opening through which the arc tube is inserted and an opening edge around the opening, the opening edge being arranged outside the step of the partition and attached to the cover;
A bulb-type fluorescent lamp comprising: 3. The light bulb-shaped fluorescent lamp according to claim 1, wherein an end surface of an opening edge of the glove is restricted in position by an outer peripheral portion of the partition. The bulb-type fluorescent lamp according to any one of claims 1 to 3, wherein a position inside the opening edge of the glove is regulated by an arc tube. The bulb-type fluorescent lamp according to any one of claims 1 to 4, wherein an opening edge of the glove and the arc tube are adhered with an adhesive. 6. The bulb-type fluorescent lamp according to claim 1, wherein a stopper for regulating an insertion position of the arc tube is provided in a mounting hole of the partition. 7. The bulb-type fluorescent lamp according to claim 1, wherein a central portion of the partition is made of metal and an outer peripheral portion is made of resin.

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