CN100578071C - Bulb-shaped fluorescent lamp and lighting fixture - Google Patents

Abstract

The present invention provides a bulb-shaped fluorescent lamp, which reduces the outer diameter of the cover to have an appearance similar to that of an ordinary incandescent bulb, and minimizes the proportion of the cover that does not emit light so that the appearance of the lamp is close to that of an ordinary lamp. The appearance of an incandescent light bulb. In the bulb-shaped fluorescent lamp (11), the maximum outer diameter (W) of the tube portion (41) of the base (15) is smaller than the maximum spiral outer diameter (D) of the luminous tube (14), therefore, the following small light bulb can be realized Shaped fluorescent lamp (11), that is, the outer diameter of the outer peripheral surface and cover (13) forming the lamp cap (15) can be reduced, and like a common incandescent bulb, the outer diameter is smaller towards the lamp socket (12). The emitted light of the luminous tube (14) is irradiated to the peripheral side of the cylindrical part (41) of the lamp cap (15), and due to the direct light irradiated from the vicinity of the peripheral side or the reflected light reflected from the peripheral side, etc., the tube The surrounding area of the lamp also emits light, so that the lighting appearance can be made close to that of an ordinary incandescent bulb, and the marketability can be improved.

Description

Bulb-shaped fluorescent lamps and lighting fixtures

technical field

The present invention relates to a bulb-shaped fluorescent lamp that can be replaced as a bulb for general lighting, and a lighting fixture using the bulb-shaped fluorescent lamp.

Background technique

Conventionally, a bulb-shaped fluorescent lamp has a luminous tube having a curved bulb, a cover on which a socket is attached at one end and supports the luminous tube at the other end, a lighting device accommodated in the cover, and Globe, etc. that cover the luminous tube and are attached to the other end side of the cover. And generally speaking, in many cases, a wall portion arranged inside a base housing (shell) is formed on one end side of the cover, and electronic components constituting the lighting device are arranged in the inner space of the wall portion. part.

In recent years, the above-mentioned bulb-shaped fluorescent lamps have gradually been miniaturized to be close to the length and maximum outer diameter of the bulbs for general lighting that comply with the Japanese industrial standard (JIS), but the proportion of the cover to the lamp length is , and the maximum outer diameter of the cover is larger. Therefore, the appearance of the light bulb for general lighting cannot be sufficiently close to that of the light bulb for general lighting. Moreover, the light directed to the socket side is blocked by the cover in a large proportion, and the light distribution characteristics at the time of lighting cannot be close enough to the light distribution of the light bulb for general lighting. characteristic.

For example, a bulb-shaped fluorescent lamp is known in which a disc-shaped holder made of metal supports a luminous tube formed in a spiral shape, and the holder and a cover made of resin covering the holder connected (for example, refer to Japanese Patent Application Laid-Open No. 2006-222079). In the above-mentioned conventional bulb-shaped fluorescent lamp, the outer peripheral surface of the base made of metal is exposed to the outside, so the heat of the arc tube can be easily dissipated to the outside.

In the previous bulb-shaped fluorescent lamp, the maximum shape of the disc-shaped lamp cap is approximately the same as the maximum spiral outer diameter of the luminous tube, therefore, the outer diameter of the cover is also equal, and it is impossible to obtain the same as the ordinary incandescent light bulb, which is closer to the lamp. Appearance shape with smaller mouth diameter. Moreover, the bottom end of the spherical lampshade is also far away from the lamp socket, so the ratio of the non-luminous cover portion near the lamp socket is relatively large, and the appearance of the lamp is also quite different from that of an ordinary incandescent bulb.

Contents of the invention

The present invention has been developed in view of the above problems, and an object of the present invention is to provide a light bulb-shaped fluorescent lamp in which the outer diameter of the cover portion is reduced to have a size of approximately Based on the appearance shape of ordinary incandescent light bulbs, and the proportion of the non-luminous cover portion is reduced as much as possible, so that the lighting appearance is close to that of ordinary incandescent light bulbs.

The bulb-shaped fluorescent lamp according to the first invention is characterized by comprising: a luminous tube formed in a spiral shape having a maximum outer diameter (D); The luminescent tube is provided on the other end side of the cover; the metal lamp cap has an annular outer peripheral surface and a cylindrical portion, one end side of the outer peripheral surface is installed on the other end side of the cover, and the outer peripheral surface A part is exposed outside, and the cylindrical part is integrally formed inside the outer peripheral surface, and protrudes toward the luminous tube side than the outer peripheral surface, and the metal lamp cap supports the luminous a tube that protrudes the luminous tube to the opposite side of the cover, wherein the maximum outer diameter (W) of the cylindrical portion is smaller than the maximum outer diameter (D) of the spiral shape of the luminous tube; and a lighting device having a mounting The circuit board is a circuit board of an electronic component constituting a lighting circuit capable of lighting the light-emitting tube, and the lighting device is arranged in the cover.

A luminous tube is a luminous tube that bends a light bulb into a spiral shape. Generally, a pair of electrodes are packaged at both ends of the discharge path, but a so-called electrodeless method that does not package a pair of electrodes in the luminous tube may also be used. .

The lamp socket is usually a screw type called E shape, but it is not limited to this as long as it can be mounted on a socket for mounting a general lighting bulb.

A lamp cap for supporting the luminous tube is installed on the other end side of the cover. Also can be installed on the cover with the spherical lampshade that covers luminous tube.

The base is formed of a metal material having good thermal conductivity such as aluminum or an aluminum alloy, and a cylindrical portion for supporting the arc tube and a partially exposed outer peripheral portion are integrally formed. The structure for supporting the arc tube is not particularly limited, but for example, the end of the arc tube can be inserted into a through hole or recess formed in the base, and adhesively fixed with an adhesive such as silicone resin.

The lighting circuit of the lighting device can be constituted by, for example, an inverter circuit. In the inverter circuit, the main body is an electronic component that applies high-frequency electric power equal to or greater than 10 kHz to the light-emitting tube to light the light-emitting tube. .

According to the present invention, the maximum outer diameter W of the cylindrical portion of the base is made smaller than the maximum spiral outer diameter D of the arc tube, so that a small bulb-shaped fluorescent lamp can be realized, that is, the outer peripheral portion forming the base and the outer surface of the cover can be similarly reduced. Diameter size, and like ordinary incandescent bulbs, the closer to the lamp socket, the smaller the outer diameter size. Then, the emitted light of the arc tube is irradiated to the peripheral side of the cylindrical part of the base, and the surrounding of the cylindrical part is also luminous due to direct light irradiated from the vicinity of the peripheral side or reflected light reflected from the peripheral side. In particular, when using a spiral-shaped arc tube, the light irradiated in the direction of the central axis of the spiral is not irradiated to the outside, and the loss ratio absorbed by the arc tube is large, but the light irradiated to the end side of the arc tube is easily Irradiate from the periphery of the barrel to the outside, so the number of sub-beams increases. Therefore, it is possible to make the lighting appearance close to that of an ordinary incandescent light bulb, thereby improving lamp efficiency and improving the marketability of products.

A second invention is the bulb-shaped fluorescent lamp according to the first invention, wherein the difference between the maximum outer diameter W of the cylindrical portion and the maximum outer diameter D of the spiral shape of the arc tube is 2 to 10 mm.

When the size difference is 2-10 mm, the gap size (d in FIG. 3 ) between the peripheral side of the barrel of the lamp cap and the outer peripheral edge of the arc tube can be set to 1-5 mm. When the gap size is less than 1 mm, it is difficult to sufficiently emit light around the cylindrical portion. Furthermore, when the gap dimension exceeds 5 mm, the bulb-shaped fluorescent lamp must be enlarged or the diameter of the cylindrical portion must be extremely reduced, which may cause problems in terms of structural design.

A third invention is the bulb-shaped fluorescent lamp according to the first invention or the second invention, wherein the cylindrical portion of the base is painted white.

The outer peripheral surface of the cylindrical portion is made white to increase the reflectivity, thereby obtaining an appearance that can effectively reflect the emitted light of the arc tube and make the surrounding of the cylindrical portion glow.

The bulb-shaped fluorescent lamp according to the fourth invention is characterized in that the cover member supports the luminous tube and houses the lighting device therein, wherein the luminous tube has a bulb at least partially formed in a spiral portion, so that The light bulb has two ends and a top, each of which has an electrode sealing portion and forms a discharge path inside the light bulb, the two ends protrude in parallel to opposite sides of the top, and the The minimum distance between the two ends is 5-15mm; the lamp socket is supported by the cover member.

According to the present invention, it is possible to configure a bulb-shaped fluorescent lamp in which the portion corresponding to the base of the lamp can be reduced as much as possible, and can be downsized to have a shape similar to or the same as that of a general lighting bulb such as an incandescent bulb.

The spiral portion of the bulb can constitute a so-called double discharge path, which refers to bending a straight tubular member at a position approximately bisected in its length direction, and then bisecting the straight tubular member into two equal parts. The approximate center of the member is bent in a helical shape as the top.

Furthermore, the straight tubular member may be formed into a shape in which about 2/3 of the straight tubular member is bent in a helical shape from one end side of the straight tubular member toward the other end as the top, and the remaining 1/3 The straight tubular member extends toward one end through a substantially helical central axis.

Furthermore, in order to make the appearance shape approximate to the silhouette of an incandescent light bulb, the top end side including the largest diameter portion of the globe may be formed into a substantially conical trapezoidal shape, at least a part of which has a diameter larger than that of the globe. The helical diameter portion of the reduced diameter portion may further be formed in a substantially spherical helical shape.

Furthermore, in order to form a short discharge path portion, an electrode sealing portion encapsulating the electrodes is formed with a predetermined length, and a linear portion is combined with a spiral portion.

In the electrode sealing portion, both end portions of the bulb may be formed in a straight line extending substantially parallel to each other, or may be formed in a curved shape inclined toward the extending direction of the spiral.

The minimum dimension between the facing inner surfaces is 5-15 mm, preferably 7-12 mm.

The lighting device can be constituted by, for example, a circuit board composed of an inverter circuit mainly composed of electronic components for lighting a light-emitting tube by applying high-frequency electric power of 10 kHz or more.

The cover member may be constituted by a base supporting the arc tube, a partition supporting the circuit board of the lighting device, and a cover supporting the socket.

The cover member can be, for example, support the circuit board of the lighting device on a cap made of synthetic resin with electrical insulation, omit the separator and be composed of the cap and the cover; Without limitation, any member capable of supporting a luminous tube and having a lighting device disposed therein may be used.

A fifth invention is the light bulb-shaped fluorescent lamp according to the fourth invention, wherein at least one of the electrode sealing parts is provided with a linear thin tube in the bulb, one end of the linear thin tube communicates with the inside of the bulb, and The other end is sealed and a mercury emitter is encapsulated inside the thin tube.

The thin tube does not have to be formed in a strict straight line, for example, may be formed in a substantially straight line such as a substantially straight line showing a gradual curve as a whole.

The capillary tube may be integrally formed in a tubular shape by reducing its diameter from the end of the bulb, or may be formed by connecting another small-diameter capillary tube to the inside of the bulb and then sealing it. The material of the thin tube can be the same as that of the light bulb, or it can be different from the light bulb. Furthermore, it can also be used for exhausting arc tubes.

As the mercury emitter, amalgam for controlling the vapor pressure of mercury can be used, but amalgam for quantitative sealing or pure mercury can also be used.

A sixth invention is the bulb-shaped fluorescent lamp according to the fourth invention, wherein the cover member is composed of the base, the partition body, and the cover, a part of the base is exposed, and is composed of a member having heat conductivity, and the partition The body supports the circuit board of the lighting device.

The base is preferably formed of at least one metal selected from the group consisting of aluminum (Al), copper (Cu), iron (Fe), and nickel (Ni) having good thermal conductivity. In addition, it may be formed of industrial materials such as aluminum nitride (AlN) and silicon carbide (SiC), and further may be formed of synthetic resin such as high thermal conductivity resin.

The separator and the cover may be made of a synthetic resin having electrical and thermal insulation properties, such as inexpensive engineering plastic such as PBT (polybutyleneterephthalate).

The seventh invention is the bulb-shaped fluorescent lamp according to the sixth invention, wherein the bulb-shaped fluorescent lamp further includes a globe, and the base further includes a base portion provided on the other end side of the barrel portion, and the base portion is formed to The light-emitting tube is supported on the disk surface, and the globe is supported on the other end side of the ring-shaped outer peripheral surface.

The roughly disc shape of the lamp holder does not have to be strictly circular as described in geometry, and can also be formed into polygons such as octagons and hexagons; regarding the shape of a bulb with a circular cross-section, it is important in appearance and design. It is only necessary to form a substantially disc shape within the allowable range from the point of view and the like.

The substantially disc shape in which the inclined portion is formed by cutting off the corner of the disk surface may be formed by cutting off the corner of the disk surface linearly, or the inclined portion may be formed by cutting the disk surface into an R (circle) shape. Furthermore, the entire circumference or substantially the entire circumference of the corners of the disk surface may be inclined.

In the inclined portion, an inclined portion formed of another member such as silicone resin may be added to the upper surface of the disc surface continuously or discontinuously with the inclined portion.

The structure for supporting the luminous tube on the lamp cap is not particularly limited. For example, a through support hole may be formed on a substantially disk-shaped disk surface, and the end of the arc tube may be inserted into the support hole for support, and a recess for support may also be formed without forming a through support hole. , fitting the end of the luminous tube into the recess for support.

Regarding the flange part, it is preferable to form a continuous annular shape on the entire circumference of the outer peripheral part of the disk surface, but it is not necessary to form a continuous annular shape on the entire circumference, and it may not be necessary to form a part of the annular shape. Continuously missing shapes.

The spherical lampshade is made of materials such as glass or translucent synthetic resin, and can be treated with colorless transparency, coloring or diffusion according to the required characteristics, and a reflective film can also be formed on a part of the spherical lampshade, etc. and other reflective units to improve the light distribution characteristics.

A lighting fixture according to an eighth invention is characterized by comprising: a fixture body, a socket attached to the fixture body, and the bulb-shaped fluorescent lamp according to any one of the first to seventh inventions mounted on the socket.

The fixture body is, for example, a downlighting type, but it is not limited thereto as long as it is a fixture body that can use a general lighting bulb. The lamp socket is usually a screw type called E shape, but it is not limited to this as long as it can be mounted with a general lighting bulb.

According to the lightbulb-shaped fluorescent lamp of the present invention, the maximum outer diameter W of the cylindrical portion of the base is made smaller than the maximum spiral outer diameter D of the arc tube, so that a small lightbulb-shaped fluorescent lamp can be realized in which the outer peripheral portion forming the base can be similarly reduced. And the outer diameter of the cover, and like ordinary incandescent bulbs, the closer to the lamp socket, the smaller the outer diameter. Moreover, the emitted light emitted by the arc tube is irradiated to the peripheral side of the cylindrical portion of the base, and the surrounding of the cylindrical portion also emits light due to the direct light irradiated from the vicinity of the peripheral side or the reflected light reflected from the peripheral side, etc. Therefore, the lighting efficiency can be improved by making the lighting appearance close to that of an ordinary incandescent bulb, and the marketability of products can be improved.

Description of drawings

Fig. 1 is a cross-sectional view showing a light bulb-shaped fluorescent lamp according to a first embodiment of the present invention, viewed from one side of a substrate.

Fig. 2 is a cross-sectional view of the above-mentioned bulb-shaped fluorescent lamp viewed from the side surface of the substrate.

Fig. 3 is a partial cross-sectional view illustrating the dimensional relationship between the arc tube and the base of the bulb-shaped fluorescent lamp described above.

Fig. 4 is a cross-sectional view of a lighting fixture using the bulb-shaped fluorescent lamp described above.

5 is a graph showing changes in luminous efficiency depending on whether or not the outer peripheral surface of the cylindrical portion of the base of the bulb-shaped fluorescent lamp described above is painted white.

Fig. 6 is a partial cross-sectional view illustrating the dimensional relationship between the arc tube and the base of the bulb-shaped fluorescent lamp according to the second embodiment of the present invention.

Fig. 7 is a front view showing an arc tube of a light bulb-shaped fluorescent lamp according to a third embodiment of the present invention.

Fig. 8 is a longitudinal sectional view showing a light bulb-shaped fluorescent lamp according to a third embodiment of the present invention.

Fig. 9 is a sectional view along A-A in Fig. 8 .

11: Bulb-shaped fluorescent lamp 12: Lamp port

13: Cover 14: Light-emitting tube

15: Lamp holder 16: Partition

17: spherical lampshade 17a: opening

18: Lighting device 21: Housing

21a: Spiral part 21b: Fixed part

22: Color edge part 23: Metal ring

26: Light socket installation part 27: Cover part

28: Board holding part, board mounting part 31: Bulb

32: Top 33: End

34: Electrode 35: Wire

36: thin tube 37: main amalgam

40: lamp head 40f, 51f: inclined part

41, 48: Tube part 42: Peripheral face

43, 50: Through jack 44: Adhesive

47: Bulkhead Department 49: Installation Department

53: Substrate 54: Lighting circuit

55: Electronic parts 56: Protruding part

57: Surrounding pin 64: Thermal insulation member

65: Heat conduction components 81: Lighting fixtures

82: Appliance body 83: Lamp holder

84: Reflector A, B: Curve

CT: Transformer D: Maximum spiral outer diameter of spiral bulb

D1: The maximum outer diameter of the spiral part D2: The outer diameter of the largest diameter part of the spherical lampshade

D3: The outer diameter of the lamp holder H2: The overall height of the lamp

o-o: light axis

Detailed ways

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 4 show the first embodiment, FIG. 1 is a cross-sectional view of a light bulb-shaped fluorescent lamp viewed from one side of the substrate, FIG. 2 is a cross-sectional view of a light bulb-shaped fluorescent lamp viewed from a side surface of the substrate, and FIG. Fig. 4 is a sectional view of a lighting fixture using a bulb-shaped fluorescent lamp.

In FIGS. 1 to 3 , 11 is a bulb-shaped fluorescent lamp, and the bulb-shaped fluorescent lamp 11 includes: a cover 13 having a lamp socket 12 at one end in the height direction; a light-emitting tube 14 supported on the other end side of the cover 13; Metal base 15 that supports one end side of the luminous tube 14 and is mounted on the other end side of the cover 13; a partition plate 16 made of synthetic resin provided to cover the inner surface side of the luminous tube 15; cover the luminous tube 14 and a spherical lampshade 17 installed on the lamp cap 15; In addition, the appearance of the bulb-shaped fluorescent lamp 11 is substantially the same as that of a general lighting bulb such as an incandescent bulb with a rated electric power of, for example, 40W, 60W, or 100W. The light bulb for general lighting refers to a light bulb conforming to the JISC7501 standard.

The cap 12 is, for example, a screw-on E26 type or the like, and includes a threaded cylindrical case 21 and an eyelet 23 provided on the top of one end of the case 21 via an insulating portion 22 . On one end side of the case 21, an externally threaded spiral portion 21a is formed, and on the other end side, an annular fixing portion 21b covered by one end portion of the cover 13 and fixed by caulking or bonding is formed.

Furthermore, the cover 13 is formed of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT), and a cylindrical socket mounting portion 26 is formed on one end side of the cover 13 . The fixing part 21b of the housing 21 of the cap 12 is attached to the cylindrical cap mounting part 26, and the annular cover part 27 expanded is formed in the other end side. Inside the cap mounting portion 26 , a groove-shaped substrate holding portion 28 is formed along the center line of the cover 13 at a position offset from the center line of the cover 13 .

In addition, the luminous tube 14 bends the central region of the bulb 31 so as to divide a straight tubular bulb 31 into two halves, and uses the curved central region of the bulb 31 as the top 32, and the two ends of the bulb 31 The side bends are formed in a helical shape. The maximum spiral outer diameter D of the arc tube 14 is about 35 to 46 mm, and about 37 mm in this embodiment. The molding method of the spiral bulb 31 is as follows: heat and melt a straight tube-shaped bulb 31 to make the bulb 31 soft, and in this state, divide it into two halves from the central area. The bulb 31 is bent, and the bent central region is used as the top 32, and the both ends of the bulb 31 are coiled along the spiral grooves of the mold, thereby forming the both ends of the bulb 31 in a spiral shape. . A pair of end portions 33 of the bulb 31 protrude in parallel toward one end direction on the opposite side of the top portion 32 .

For example, a three-band fluorescent body is formed on the inner surface of the bulb 31, and a rare gas such as argon (Ar), neon (Ne) or krypton (Kr) or mercury or the like is sealed inside the bulb 31. Filler gas.

In a pair of end portions 33 of the bulb 31, a pair of electrodes 34 are packaged with flare stems. Each electrode 34 has a filament coil suspended by a pair of dumet wires. A pair of Dumet wires are encapsulated by, for example, a horn stem, and are connected to a pair of wires that are led out from the horn stem and connected to the lighting device 18 .

At each end 33 of the bulb 31, a cylindrical thin tube 36, also called an exhaust pipe, installed in the horn tube stem protrudes, and the cylindrical thin tube 36 is connected to each end. Part 33 is connected. During the manufacturing process of the luminous tube 14, the thin tubes 36 are sequentially sealed by melting, and the unsealed part of the thin tubes 36 is passed through to exhaust the inside of the luminous tube 14. Sealing is performed by sealing the capillary tube 36 by sealing it with filling gas to replace the original gas inside.

One of the thin tubes 36 is formed so that the front end extends to the inside of the cap 12 and has a long length, and the main amalgam 37 as an amalgam is sealed in the front end when sealing. The main amalgam 37 is an alloy composed of bismuth, tin, and mercury, and is formed in a roughly spherical shape, and functions to control the mercury vapor pressure in the arc tube 14 within an appropriate range. In addition, in addition to bismuth and tin, alloys composed of indium and lead can also be used to form the main amalgam 37 . Furthermore, an auxiliary amalgam having a function of absorbing and releasing mercury may also be attached to the Dumet wire of the electrode 34 .

The base 15 is formed of a metal material having good thermal conductivity such as aluminum or an aluminum alloy, and includes a disc-shaped base 40 and a cylindrical barrel 41 protruding from the peripheral portion of the base 40 to one end side. And an annular outer peripheral surface portion 42 protruding outward from one end side of the cylindrical portion 41 . The maximum outer diameter W of the base 15 is 30 to 40 mm, and is about 35 mm in this embodiment. Accordingly, the gap dimension d between the peripheral side surface of the cylindrical portion 41 of the base 15 and the outer peripheral edge of the arc tube 14 can be set to 1 to 5 mm.

In the lamp head 40, a pair of insertion holes 43 are formed, through which the pair of ends 33 of the light emitting tube 14 are inserted. In the state where the pair of end portions 33 of the arc tube 14 are inserted into the pair of through holes 43, an adhesive 44 such as silicone resin or epoxy resin is injected from the inside of the cylinder portion 41 to bond the arc tube 14 Connect and be fixed on the lamp holder 15.

One end side of the outer peripheral surface portion 42 is fitted and installed in the other end side of the cover portion 27 of the cover 13, and one end side of the outer peripheral surface portion 42 is expanded toward the other end side of the cover portion 27, and the other end side of the outer peripheral surface portion 42 is installed. Wear spherical lampshade 17. Therefore, the outer peripheral surface portion 42 is exposed to the outside from between the cover 13 and the globe 17 , and the cover 13 and the globe 17 constitute a part of the appearance of the light bulb-shaped fluorescent lamp 11 together. Since the surface material of the base 15 is aluminum, the reflectance of light is high, and the surface of the base 40 and the surface of the barrel 41 are used as reflecting surfaces.

Furthermore, the separator 16 is formed of a heat-resistant synthetic resin material such as polybutylene terephthalate (PBT), and is provided with a disk-shaped separator portion 47 , and a peripheral portion of the separator portion 47 A cylindrical tube portion 48 protruding to one end side, and a mounting portion 49 protruding outward from one end of the tube portion 48 . The installation part 49 is clamped and installed between the cover 13 and the lamp base 15, and can be fixed by adhesive with a viscous adhesive such as silicone resin or epoxy resin.

A pair of insertion holes 50 are formed in the partition portion 47, and the thin tubes 36 and the wires 35 of the light emitting tube 14 are inserted therethrough. In addition, although not shown, a groove-shaped substrate holding portion is formed inside the cylindrical portion 48 at a position deviated from the center line of the spacer 16 and along the center line of the spacer 16 .

The globe 17 is made of transparent or light-diffusing glass or synthetic resin, and has a smooth curved shape close to the glass bulb shape of a general lighting bulb such as an incandescent bulb. An opening 17a is formed at one end of the globe 17, and the edge of the opening 17a is fitted inside the outer peripheral surface 42 of the lamp cap 15, and is bonded with a viscous adhesive such as silicone resin or epoxy resin. Adhesive fixation. The shortest distance a between the inner surface of the spherical lampshade 17 and the luminous tube 14 is 2-5 mm. When lateral vibration is applied to the bulb-shaped fluorescent lamp 11, the arc tube 14 also vibrates in the lateral direction, but since the arc tube 14 vibrates with the base 15 as a fulcrum, the amplitude of the vibration at the top side increases. Therefore, the shortest distance a is set to 2 to 5 mm, so that even if the bulb-shaped fluorescent lamp 11 vibrates in the lateral direction, the top side of the arc tube 14 can be prevented from being damaged due to contact with the inner surface of the globe 17 .

Furthermore, the lighting device 18 includes a substrate 53 on which a plurality of electronic components 55 constituting a lighting circuit 54 are mounted. In the base plate 53, the width of the socket 12 side is narrow relative to the cover 13 side, and the socket 12 side of the substrate 53 is formed in a width dimension that can be inserted into the inside of the socket 12, and, relative to the width dimension, the height Dimensions are formed into an elongated roughly rectangular shape.

The two side edges of the substrate 53 are inserted and engaged in the pair of substrate mounting portions 28 of the cover 13 and the pair of substrate mounting portions of the partition 16, and along the central axes of the cover 13 and the partition 16, the The base plate 53 is arranged in a vertically long shape; and, the base plate 53 is arranged at a position deviated from the center line of the cover 13 and the partition plate 16 . That is to say, in the state where the cap 12, the cover 13, the cap 15, and the partition plate 16 are combined, the base plate 53 is arranged in a vertically long shape along the centerline direction of the cap 12 inside the cap 12, And, it arrange|positions in the position deviated from the center line of the cap 12. As shown in FIG.

On the other end side of the light-emitting tube 14 side of the substrate 53, a protruding portion 56 abutting against the partition plate 16 at the center position of the other end side protrudes. There are four wrapping pins 57, on which a pair of wires 35 of each electrode 34 of the light emitting tube 14 are respectively coiled and connected. By connecting the lead wire 35 of the luminous tube 14 to the surrounding pin 57 or by inserting the base plate 53 between the socket 12 and the partition plate 16, the position in the height direction of the base plate 53 is maintained.

Next, for assembling the bulb-shaped fluorescent lamp 11, each end portion 33 of one end side of the arc tube 14 is inserted into each through-hole 43 of the lamp cap 15, and the adhesive 44 is injected from the inside of the lamp cap 15 to seal the arc tube 14. Each end portion 33 is adhesively fixed on the lamp cap 15 .

Thin tubes 36 and lead wires 35 protruding from the ends 33 of the arc tube 14 protruding inside the cap 15 are passed through the through holes 50 of the partition 16 , and the partition 16 is inserted into the cap 15 .

Insert both side edges of the substrate 53 into the substrate mounting portion of the partition 16, coil and connect each lead wire 35 of the luminous tube 14 protruding to the inside of the partition 16 to each surrounding pin 57 of the substrate 53 (omit the illustration of the coiled state described above).

The base 15 and the cover 13 are combined and combined. A heat rejection member 64 is injected into the opening between the inner peripheral surface of the cover 13 and the substrate 53 and the electronic component 55 to fill it.

A lead wire (not shown) connected to the input part side of the substrate 53 is connected to the metal ring 23 of the lamp socket 12, and the other lead wire is arranged on the lamp socket mounting part 26 of the cover 13, and The outer periphery of the socket mounting part 26 fits the fixing part 21b of the housing 21 of the lamp socket 12 and clamps the front end of another lead wire, and fixes the fixing part 21b of the housing 21 to the lamp socket of the cover 13 by riveting. part 26, and another lead wire is electrically and mechanically connected to the housing 21.

Before combining the cap 12, the heat conducting member 65 is injected into the front end portion of the capillary 36, the substrate 53, the electronic parts 55, etc. accommodated in the cap 12, or the heat conducting member 65 is injected into the inside of the cap 12, so that The base 12 is combined so that the tip of the thin tube 36 , the substrate 53 , the electronic component 55 , and the base 12 are thermally connected by the heat conduction member 65 .

The spherical lampshade 17 is covered on the luminous tube 14, and the spherical lampshade 17 is fixed on the lamp holder 15 by an adhesive.

In the bulb-shaped fluorescent lamp 11 formed in this way, the maximum outer diameter of the spherical lampshade is about 65mm, the overall height of the lamp including the lamp socket 12 is about 133mm, and the electric power of the lamp including the circuit loss is less than or equal to 23W, and The total luminous flux is approximately greater than or equal to 1500lm, so that the bulb-shaped fluorescent lamp 11 can be used to replace a 100W equivalent bulb for general lighting.

And, as shown in FIG. 4 , for example, a lighting fixture 81 for downward lighting has a fixture body 82 , and a lamp holder 83 and a reflector 84 are mounted in the fixture body 82 , and a bulb-shaped fluorescent lamp 11 is mounted on the lamp socket 83 . .

In the bulb-shaped fluorescent lamp 11 constructed in this way, the maximum outer diameter W of the cylindrical portion 41 of the base 15 is made smaller than the maximum spiral outer diameter D of the arc tube 14, so that a small bulb-shaped fluorescent lamp 11 can be realized in which the base can be reduced in size. The outer peripheral surface of 15 and the outer diameter of cover 13 are the same as common incandescent light bulbs, the closer they are to the socket 12, the smaller the outer diameter.

Moreover, the emitted light of the arc tube 14 is irradiated to the peripheral side of the cylindrical portion 41 of the lamp cap 15, and due to the direct light irradiated near the peripheral side or the reflected light reflected from the peripheral side, the surrounding of the cylindrical portion Lighting, therefore, can make the lighting appearance close to the appearance of ordinary incandescent bulbs, so that the marketability of goods can be improved.

Moreover, the substrate 53 formed to have a width dimension that can be inserted into the inside of the cap 12 is arranged in a vertically long shape along the centerline direction of the cap 12, whereby the substrate 53 and the electronic components 55 can be arranged in the cap 12. The cover 13 is made smaller in size.

By arranging the substrate 53 at a position deviated from the center line of the socket 12, the large electronic components 55 among the electronic components 55 can be arranged on the side of the substrate 53 with a wide distance from the socket 12, so that the electronic components 55 can be effectively placed The lighting device 18 is accommodated inside the socket 12, whereby the cover 13 and the like can be downsized. In particular, transformer (transformer) CT etc. need to increase the number of windings according to the requirement of high output, so the size increases, therefore, the above-mentioned large-scale transformer CT can be arranged on the side with a wide distance from the socket 12 of the substrate 53 superior.

By forming the substrate 53 that can be inserted into the base plate 53 inside the cap 12 with a width dimension, and disposing it in a vertically long shape along the center line direction of the cap 12, the front end portion of the capillary tube 36 of the arc tube 14 in which the main amalgam 37 is sealed can be It is arranged between the inner side of the lamp socket 12 and the base plate 53, and can reduce the thermal influence of the luminescent tube 14 on the main amalgam 37 during lighting, and can effectively arrange the lighting device 18 and the thin tube 36 inside the lamp socket 12 Therefore, the cover 13 can be miniaturized. In addition, the base plate 53 is disposed at a position deviated from the center line of the cap 12, and the capillary tube 36 enclosing the main amalgam 37 is disposed between the substrate 53 and the cap 12 on the narrow side. Therefore, Large electronic components 55 can be arranged on the side where the distance between substrate 53 and cap 12 is wide, and lighting device 18 and thin tube 36 enclosing main amalgam 37 can be efficiently arranged inside cap 12 .

The heat conduction member 65 disposed inside the socket 12 and thermally connecting the substrate 53 and the socket 12 can effectively transfer the heat of the electronic component 55 from the substrate 53 side to the socket 12 side, thereby improving heat dissipation.

Utilize the metal lamp base 15 that is exposed from the cover 13 and installed on the other end side of the cover 13, the heat of the light-emitting tube 14 supported by the lamp base 15 can be effectively dissipated to the outside, and the heat inside the cover 13 can be effectively dissipated. Radiates to the outside, and can reduce the temperature of the electronic component 55 and the substrate 53 .

When the inner side of the lamp socket 12 utilizes the heat-conducting member 65 to thermally connect the front end portion of the capillary 36 sealed with the main amalgam 37, a part of the electronic parts 55, and the lamp socket 12, the heat of the electronic parts 55 is effectively transferred to the lamp socket 12. The base 12 dissipates heat, and when the temperature of the tip of the thin tube 36 is low, the heat of the electronic component 55 is transferred to the tip of the thin tube 36 as in the case of lighting with the base 12 facing downward. Therefore, at this time, the heat conduction member 65 can be used to maintain a uniform temperature at the front end of the thin tube 36 and prevent the total luminous flux from decreasing.

The thermal insulation member 64 is used to isolate the heat between the lamp base 12 side and the arc tube 14 side, and the heat conduction member 65 is used to thermally connect the front end of the thin tube 36 , a part of the electronic parts 55 and the lamp base 12 . In this way, when the direction of the socket 12 of the bulb-shaped fluorescent lamp 11 is any direction such as upward, downward, or horizontal, the front end of the thin tube 36 in the socket 12, the electronic parts 55, etc. can be kept at a uniform temperature. , and the total luminous flux and luminous efficiency are fixed.

In this way, the bulb-shaped fluorescent lamp 11 can obtain approximately the same appearance as an incandescent bulb and other general lighting bulbs, and regardless of the direction of the bulb-shaped fluorescent lamp 11, stable light beams and luminous efficiency can be obtained, and the use of incandescent bulbs and other general lighting can be improved. Applicability of lighting fixtures using light bulbs.

In the bulb-shaped fluorescent lamp 11 of this embodiment, the globe 17 covering the arc tube 14 is attached, but when the globe 17 is omitted and the arc tube 14 is exposed, it is also possible to obtain a bulb for general lighting such as an incandescent bulb. Approximately the same appearance size, and can further improve the applicability of lighting fixtures using general lighting bulbs such as incandescent bulbs.

Next, the improvement effect of the luminous efficiency when the outer peripheral surface of the cylindrical part 41 of the base part 40 is white is demonstrated.

5 is a graph showing changes in luminous efficiency depending on whether or not the outer peripheral surface of the cylindrical portion 41 of the base 15 of the bulb-shaped fluorescent lamp 11 is painted white. The horizontal axis of the graph of FIG. 5 represents the input electric power of the luminous tube 14, and the vertical axis represents the relative value of luminous efficiency. A comparative example in which aluminum, which is a material of the base 40, is exposed on the outer peripheral surface. In addition, 100% of the relative luminous efficiency of the vertical axis is the maximum value of the line A obtained in this test.

In order to further reduce the light loss by the base 15, the present inventors tested the outer surfaces of the base 40 and the barrel 41 of the base 15 made of aluminum diecast by coating white. In the test, 15 uncoated normal products and white-coated products were prepared respectively, and the total luminous fluxes after being lit for 100 hours at each input electric power were measured. As a result, as shown by the two approximate curves A and B in FIG. 5 , it was confirmed that the luminous efficiency showed a difference of about 2%.

In particular, the double helical luminous tube is a shape that is easy to obtain a long discharge length and has high luminous efficiency, but it is insufficient in terms of light emission efficiency when a separator and an outer tube globe are combined. Furthermore, in small, high-density, especially high-illuminance arc tubes exceeding 20W, it is effective to use a metal spacer such as the lamp head 40 in order to reduce the thermal stress of the electronic circuit. At this time, the smaller the area of the disc-shaped lamp head 40 is, the higher the effective utilization rate of the light irradiated from the inner coiled part of the spiral arc tube 14 toward the lamp head 40 is, so it is preferable. For the luminous tube formed by connecting U-shaped curved bulbs, the width of the light-emitting part is approximately the same as the width of the end part side, so it is difficult to make the width of the base 40 smaller than the width of the luminous tube, but for the present embodiment In the case of the spiral arc tube 14, the distance between the ends 33 and 33 can be shortened, and therefore the width of the base 40 can be reduced, which is advantageous.

Next, a second embodiment will be described.

Fig. 6 is a partial cross-sectional view illustrating the dimensional relationship between the arc tube and the base of the light bulb-shaped fluorescent lamp according to the second embodiment. In addition, in FIG. 6 , the same symbols are assigned to the same members as those shown in FIGS. 1 to 3 , and detailed descriptions are omitted.

The bulb ends 33, 33 of the arc tube 14 of the present embodiment face each other at a position further inside the maximum outer diameter D of the spiral bulb 31, and are close to each other. The two end portions 33, 33 of the bulb are arranged in a facing state, and the minimum dimension b between the facing inner surfaces is set to 5-15 mm, preferably 7-12 mm. In this embodiment, it is set to about 10 mm. When the dimension b between the facing inner surfaces is less than 5 mm, the temperature of the electrode part increases, and thermal deterioration of the electrode or the bulb tends to occur. Furthermore, the temperature of the auxiliary amalgam and the like sealed in the bulb end portions 33, 33 also increases, making it difficult to obtain desired light emission characteristics. Furthermore, at the end of the service life of the arc tube, abnormal heat tends to be generated near the electrodes.

Moreover, when the dimension b between the opposing inner surfaces exceeds 15 mm, the distance d between the bulb ends 33, 33 and the base of the globe 17 is shortened, and the bulb ends 33, 33 are reflected on the globe 17 to form a shadow. In particular, since the bulb ends 33 and 33 near the base of the globe 17 hardly emit light, shadows are likely to be reflected due to differences in brightness and darkness. Conversely, when the bulb ends 33, 33 are away from the root of the globe 17, shadows hardly appear, but there is a problem that the portion becomes thick and the bulb profile cannot be made similar to that of an incandescent bulb.

The outer peripheral surface of the cylindrical part 41 of the base 15 of this embodiment is formed so that the whole circumference may incline. Since the outer peripheral surface of the cylindrical portion 41 is inclined, the light irradiated from the inner coiled portion of the spiral arc tube 14 toward the lamp head 40 is irradiated outward, so that the vicinity of the base of the globe 17 is hardly darkened. Furthermore, since the light incident on the outer peripheral surface of the cylindrical portion 41 is reflected toward the top of the globe 17 , there is an advantage that the amount of light emitted at the middle portion side of the globe 17 increases.

Next, a light bulb-shaped fluorescent lamp according to a third embodiment of the present invention will be described with reference to FIGS. 7 to 9 .

Fig. 7 is a front view showing an arc tube of a light bulb-shaped fluorescent lamp according to a third embodiment of the present invention. Fig. 8 is a longitudinal sectional view showing a light bulb-shaped fluorescent lamp according to a third embodiment of the present invention. Fig. 9 is a sectional view along A-A in Fig. 8 . In addition, in FIGS. 7 to 9 , the same components as shown in FIGS. 1 to 3 are given the same reference numerals, and detailed description thereof will be omitted.

The lightbulb-shaped fluorescent lamp of this embodiment corresponds to the 100W incandescent bulb using the arc tube which has a spiral part.

The arc tube 14 is constituted by a glass bulb 31 and has electrode sealing portions 33 , 33 formed at both ends of the spiral bulb.

In the spiral part, a straight round tubular bulb made of transparent lead-free glass with an outer diameter of about 10 mm is bent in half in the length direction, and the roughly center of the bisected straight tubular member As the top 32 , both ends of the bulb are wound around a molding jig not shown to form a helical shape, and are molded into a substantially cylindrical double helical shape by a mold.

Furthermore, from the end of the double-helical helix, both ends 33, 33 of the bulb 31 are bent at approximately right angles toward opposite sides of the top 32, and are approximately parallel to the pivot shaft (lamp axis o-o) of the helix. , forming a pair of straight lines. The two end portions 33, 33 having the linear portion protrude parallel to each other, and are bent so as to face the lamp axis o-o and close together, in other words, so as to wrap the final terminal portion of the spiral inside. Both ends 33,33.

In addition, the bending process of both ends of the bulb is carried out after pulling out the forming jig from the spiral portion. Thus, the two end portions 33, 33 of the bulb having the spiral portion face each other at a position further inside the maximum outer diameter D1 of the spiral portion and approach each other, in other words, so that the most terminal portion of the spiral is wound inward. Method Arrange the two ends 33, 33 of the bulb in a facing state, and set the minimum dimension b between the facing inner surfaces to 5-15 mm, preferably 7-12 mm. In this embodiment, it is set to about 10mm.

A pair of electrodes 34, 34 are respectively sealed in both end portions 33, 33 of the bulb 31 to form an electrode sealing portion. Thus, the spiral portion is continuous with both end portions 33, 33, has electrode sealing end portions at both end portions, and forms one elongated discharge path inside.

In addition, when the dimension b between the opposing inner surfaces is less than 5 mm, the temperature of the electrode portion increases, and thermal deterioration of the electrode tends to occur. Furthermore, the temperature of auxiliary amalgam and the like sealed in the end portion of the bulb also increases, making it difficult to obtain desired light emission characteristics. Furthermore, at the end of the service life of the arc tube, abnormal heat tends to be generated near the electrodes.

Moreover, when the dimension b between the opposing inner surfaces exceeds 15 mm, the distance between the end of the bulb and the root of the spherical lampshade is shortened, so that the two ends are reflected on the spherical lampshade to form a shadow. In particular, since the portion near the electrode as the root includes a non-luminous portion, shadows are likely to be reflected due to differences in brightness and darkness. Conversely, when the bulb end is far from the root of the globe, shadows are difficult to appear, but the neck of the lamp becomes thicker, making it impossible to make the bulb profile resemble that of an incandescent bulb. In addition, the strength of the arc tube, especially the strength in the opening direction of both ends decreases, and it is easy to break.

At the end 33 of the bulb 31 is protruded a thin tube 36 whose one end communicates with the inside of the tube and whose other end is sealed. The thin tube 36 is made of the same transparent lead-free glass as the glass constituting the light bulb 31, and is parallel to the lamp axis o-o in a straight line, and the front end of one of the elongated thin tubes 36 is sealed with mercury as mercury. The main amalgam 37 of the emitter. And the other thin tube 36 forms an exhaust pipe, and the protruding length is smaller than the one of the thin tubes 36 .

The luminous tube 14 is constructed in such a manner that the two ends 33, 33 of the bulb 31 are close to each other and face each other on the inner side of the maximum outer diameter D1 of the spiral portion. The form that is rolled inward is formed in a substantially cylindrical shape with a reduced outer diameter below the spiral portion.

The tube outer diameter of the bulb of the luminous tube 14 is about 10 mm, the maximum outer diameter D1 of the spiral portion is about 40 mm, and the height H1 is about 76 mm. Dimension b between facing inner surfaces is about 10mm, dimension c between outer surfaces of opposite bulb ends 33 and 33 is about 30mm, discharge path length between a pair of electrodes 34 and 34 is about 580mm, and rated lamp power is about 21W.

Next, the structure of the bulb-shaped fluorescent lamp using the arc tube comprised as mentioned above is demonstrated. Hereinafter, the case where the arc tube is set to the upper side and the base is set to the lower side will be described.

Compared with the first embodiment, the light bulb-shaped fluorescent lamp 11 of this embodiment is characterized by the structure of the base 40 . That is, the inclined portion 40f is integrally formed in a shape in which the corners of the outer periphery of the disk surface 41 of the base 40 are cut off over the entire circumference. The inclined portion 40f may be cut into an R shape (a quarter circle) to form the inclined portion. Furthermore, it is also possible to incline substantially the entire circumference while leaving a part of the corners of the disk surface.

In this way, the two ends 33, 33 of the arc tube are supported in a state facing the inclined portion 40f with the corner cut off, so that the light irradiated from the vicinity of the two ends (near the electrodes) will not be blocked by the corners of the base and Therefore, the vicinity of the root of the globe 17 is difficult to be darkened (as shown by arrows in FIGS. 8 and 9 ). Moreover, the upper surface of the disc surface as the lamp cap 40 is made of aluminum, so the surface is a light reflecting surface, and the light irradiated downward from the arc tube 14 is reflected upward by the upper surface of the aluminum, further avoiding light loss.

In addition, as described above, in the arc tube 14, the bulb end portions 33 and 33 having the electrode sealing portion are arranged facing each other on the inner side of the maximum outer diameter D1 of the spiral portion, and the minimum dimension between the opposing inner surfaces b is set to about 10 mm, therefore, the distance between the pair of bulb support holes can be made small, and the diameter of the base 40 can be reduced.

As shown in FIG. 9, in the bulb-shaped fluorescent lamp 11 constructed as described above, the overall height H2 of the lamp including the socket 12 is about 130 mm, and the outer diameter D2 of the largest diameter portion of the spherical lampshade 17 is about 65 mm. The diameter of the thinnest part (the outer diameter of the lamp cap) D3 is about 44mm, the rated lamp power including the circuit loss is about 21w, and the total luminous flux is about 15001m, so that the bulb-shaped fluorescent lamp 11 can be used to Replaces ordinary incandescent light bulbs equivalent to 100W. In addition, it is preferable that the diameter (outer diameter dimension) D3 of the thinnest part of a neck part is 40-44 mm.

In the luminous tube 14, the two ends 33, 33 of the bulb having the helical portion face each other on the inner side of the maximum outer diameter D1 of the helical portion, and the minimum dimension b between the opposing inner surfaces is set to about Therefore, the diameter of the lamp cap 40 is small, and when the spherical lampshade 17 is covered on the luminous tube 14, the root of the opposite spherical lampshade 17 can be formed into a thinner shape along the small lamp cap 40, and can be further made The bulb-shaped fluorescent lamp has a shape similar to or the same as that of a general lighting bulb such as an incandescent bulb.

Furthermore, even if the base of the globe 17 is formed into a thinner shape, the base 40 can be further miniaturized, so that the cap part does not appear as a shadow on the globe 17 and impairs the appearance.

Furthermore, the lamp head 40 is substantially disc-shaped with an inclined portion 40f cut off from the corner formed by the intersection of the outer peripheral surface of the cylindrical portion 41 and the disk surface on which a pair of through-holes are formed. Therefore, the two end portions 33, 33 of the arc tube are supported in a state facing the inclined portion 40f, so that the light irradiated from the vicinity of both end portions (near the electrodes) is not blocked by the corners of the cap and is irradiated downward. The base of the globe 17 does not become a dark part, and can be illuminated with a light distribution similar to or the same as that of an incandescent bulb. In particular, the portion near the electrode as the root portion includes a portion that does not emit light, so shadows are likely to appear. If only the root portion is thinned, shadows are extremely likely to appear, but the vicinity of both ends of the arc tube 14 can be effectively used by the inclined portion 40f. light, so as to fully emit light. Moreover, at the same time, there are no corners on the lamp base 40, and the corners will not become shadows because the corners are reflected on the spherical lampshade 17, so the appearance will not be damaged.

Furthermore, the spiral portion of the luminous tube 14 can be provided at the center of the lamp to ensure a long discharge path formed by the spiral portion, thereby increasing the light beam and improving luminous efficiency, and can provide sufficient brightness while performing efficient lighting.

Claims (7)

1. A bulb-shaped fluorescent lamp, characterized in that it comprises: The luminous tube is formed in a spiral shape, and the maximum outer diameter of the spiral shape is D; A cover member, the cover member is composed of a metal lamp base, a separator, and a cover, the lamp socket is installed on one end side of the cover, and the light-emitting tube is provided on the other end side of the cover, the metal Made of a lamp cap made of heat-conducting members, it has a ring-shaped outer peripheral surface and a tube, one end of the outer peripheral surface is mounted on the other end of the cover, a part of the outer peripheral surface is exposed, and the tube part is integrally formed on the inner side of the outer peripheral part, and protrudes toward the arc tube side than the outer peripheral part, and the metal base supports the arc tube through the cylindrical part, so that the arc tube The opposite side of the cover protrudes, wherein the maximum outer diameter (W) of the cylindrical portion is smaller than the maximum outer diameter (D) of the spiral shape of the light emitting tube; and A lighting device having a circuit board mounted with electronic parts constituting a lighting circuit capable of lighting the light-emitting tube, the lighting device is arranged in the cover, and the partition supports the lighting The circuit substrate of the device. 2. The bulb-shaped fluorescent lamp of claim 1, wherein: The difference between the maximum outer diameter (W) of the cylindrical part and the maximum outer diameter (D) of the spiral shape of the arc tube is 2 to 10 mm. 3. The bulb-shaped fluorescent lamp according to claim 1 or 2, characterized in that: The barrel portion of the base is painted white. 4. The bulb-shaped fluorescent lamp of claim 1, wherein: The cover member supports the luminous tube and houses the lighting device inside, wherein The luminous tube has a bulb at least partially formed in a spiral shape, the bulb has two ends and a top, electrode sealing portions are respectively provided at the two ends, and a discharge path is formed inside the bulb, The two ends protrude in parallel to opposite sides of the top, and the minimum distance between the two ends is 5-15 mm; the lamp socket is supported by the cover member. 5. The bulb-shaped fluorescent lamp of claim 4, wherein: In the bulb, at least one of the electrode sealing parts is provided with a linear thin tube, one end of the linear thin tube communicates with the inside of the bulb, and the other end is sealed, and the mercury emitter is encapsulated in the bulb. inside the thin tube. 6. The bulb-shaped fluorescent lamp of claim 1, wherein: The bulb-shaped fluorescent lamp further includes a spherical lampshade, and the base further includes a base portion provided on the other end side of the cylindrical portion. The light-emitting tube is supported on the disk surface, and the spherical lampshade is supported on the other end side of the annular outer peripheral surface. 7. A lighting fixture, characterized by comprising: appliance body; lampholders, mounted on the body of the appliance; and The bulb-shaped fluorescent lamp according to any one of claims 1 to 6 mounted on a lamp holder.

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