JP2009224222A - Compact self-ballasted fluorescent lamp and lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact self-ballasted fluorescent lamp 11 which secures a sufficient fixing strength with an arc tube 14 and a holder 15 and improves light extracting efficiency. <P>SOLUTION: A pair of electrode sealing end portions 33 of an arc tube 14 is inserted into an inside of a pair of ribs 48 projected on a holder 15, and the electrode sealing end portion 33 is fixed in the inside of the ribs 48 by an adhesive 52. A strength of the ribs 48 themselves are increased by providing the ribs 48 continuously on a projection portion 47 projected on a central area of the holder 15, and a fixing strength between the arc tube 14 and the holder 15 is sufficiently secured. A light extracting efficiency is improved by reducing blockage of light by the projection portion 47 and the ribs 48. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bulb-type fluorescent lamp that can be used in place of a general lighting bulb, and a lighting fixture using the bulb-type fluorescent lamp.

  Conventionally, a bulb-type fluorescent lamp has a light emitting tube having a bulb in which a pair of electrodes are sealed at a pair of electrode sealing ends disposed on one end side in the axial direction, a holder that supports the light emitting tube, and a base on one end side. A cover that is attached and has a holder supported on the other end side, a lighting device housed in the cover, and a glove that covers the arc tube and is supported by the cover on one end side.

As a bulb shape of the arc tube, there is one formed in a spiral shape. To support this bulb with a holder, a pair of electrode sealing ends including a portion where the pair of electrodes of the bulb are sealed are arranged inside the holder. And is fixed with an adhesive (for example, see Patent Document 1).
Japanese Patent Laying-Open No. 2004-311032 (page 3-4, FIG. 1)

  When the bulb is supported by the holder, the pair of electrode sealing ends including the portion where the pair of electrodes of the bulb are sealed are inserted inside the holder and fixed with an adhesive. The light emitted from the side is blocked by the holder, and there is a problem that the light extraction efficiency for extracting light to the outside as a bulb-type fluorescent lamp is lowered.

  Further, if the amount of inserting the pair of electrode sealing ends of the bulb into the holder is reduced, the fixing strength is reduced and sufficient light extraction efficiency cannot be improved.

  The present invention has been made in view of the above points, and is a bulb-type that can secure sufficient fixing strength between the arc tube and the holder and can improve the light extraction efficiency as compared with the conventional case in which the electrode sealing end is inserted into the holder. It is an object of the present invention to provide a fluorescent lamp and a lighting fixture using the bulb-type fluorescent lamp.

  The bulb-type fluorescent lamp according to claim 1 is a bulb having a pair of electrode sealing ends on one end side and an arc tube having a pair of electrodes sealed on the pair of electrode sealing ends; The convex portion protrudes from the central region, and a pair of ribs that fit the pair of electrode sealing end portions of the arc tube continuously project from the convex portion, and the electrode sealing end portion is provided inside the rib. A holder fixed with an adhesive; a cover with a base attached to one end and a holder supported on the other end; and a lighting device housed in the cover.

  The bulb of the arc tube may be any one of a bulb bent in a spiral shape, a bulb having a bent shape in which a plurality of U-shaped tubes are juxtaposed. Moreover, if the outer shape of the bulb is formed in a shape that follows the shape of the globe, the discharge path length becomes longer and the light emission efficiency becomes higher.

  The rib of the holder may have a substantially C-shaped cross section that opens in the outer peripheral direction of the holder, a cylindrical shape, or the like, but a substantially C-shaped cross section is preferable for improving light extraction efficiency. The rib secures a bonding area by an adhesive with the outer peripheral surface of the electrode sealing end portion of the arc tube and reduces the protrusion of the adhesive.

  The convex portion of the holder may be formed so as to have, for example, an approximately 8-shaped outer shape along a pair of ribs, and some parts of the lighting device are placed inside the convex portion on one end side of the holder. You may arrange. The adhesive for fixing the electrode sealing end portion inside the rib may be any cement such as cement containing silicon oxide or a silicon compound as a main component, or a silicone resin.

  A screw-in type referred to as an E-type is normally used as the base, but it is not limited to this as long as it can be attached to a socket to which a general lighting bulb is attached.

  The cover indirectly supports the arc tube via the holder.

  For example, the lighting device may be configured by an inverter circuit mainly composed of electronic components that turn on the arc tube by applying high-frequency power of 10 kHz or more to the arc tube.

  The bulb-type fluorescent lamp according to claim 2 is the bulb-type fluorescent lamp according to claim 1, wherein the outer shape of the convex portion in a direction intersecting with the direction in which the pair of ribs of the holder are arranged projects from the rib and the outer periphery of the holder It is provided apart from the inside.

  If the outer shape of the convex part in the direction intersecting the direction in which the pair of ribs of the holder intersect is not protruding from the ribs, the ribs cannot be sufficiently reinforced and are not separated inward from the outer peripheral part of the holder , The light going to one end side is blocked and the light extraction efficiency is lowered.

  The light bulb shaped fluorescent lamp according to claim 3 is the light bulb shaped fluorescent lamp according to claim 1 or 2, wherein a flame retardant is provided on the inner surface of one end side of the holder.

  The flame retardant material may be formed by applying cement, silicone resin, or the like whose main component is the same to the inner surface of one end of the holder, or a separate flame retardant material may be disposed.

  The light bulb shaped fluorescent lamp according to claim 4 is the light bulb shaped fluorescent lamp according to any one of claims 1 to 3, wherein the light emitting tube is accommodated and a locking structure for locking the cover on one end side is provided. It has a glove.

  The globe is made of a resin having translucency. For example, the top side which is the other end side is spherical, and a reduced diameter portion having a smaller diameter than the maximum diameter portion on the top side is formed on one end side supported by the cover. The reduced diameter portion may be smaller or larger than the maximum diameter portion of the arc tube. In the case of a small diameter, the globe is divided into a plurality of parts so as to accommodate the arc tube.

  The locking structure may be any of a concave-convex fitting structure, a screw threaded structure, and a combination thereof.

  The lighting fixture according to claim 5 comprises: a fixture main body; a socket attached to the fixture main body; and the light bulb shaped fluorescent lamp according to any one of claims 1 to 4 connected to the socket. is there.

  The instrument body is, for example, a downlight, but is not limited to this as long as the instrument body uses a general lighting bulb. As the socket, a screw-in type called E-type is usually used, but the socket is not limited to this as long as it is a socket to which a general lighting bulb is attached.

  According to the light bulb shaped fluorescent lamp according to claim 1, the pair of electrode sealing ends of the arc tube are fitted inside the pair of ribs projecting from the holder, and the electrode sealing end by an adhesive inside the rib. Can be firmly fixed, and the rib itself can be improved by continuously projecting from the convex part projecting in the center area of the holder, so that sufficient fixing strength can be secured, The light extraction efficiency can be improved as compared with the conventional case in which the electrode sealing end is inserted.

  According to the light bulb shaped fluorescent lamp according to claim 2, in addition to the effect of the light bulb shaped fluorescent lamp according to claim 1, the outer shape of the convex portion in the direction intersecting the direction in which the pair of ribs of the holder are arranged is rib Since it protrudes more and is provided away from the outer periphery of the holder, it is possible to improve both the strength of the rib and prevent light from being blocked by the convex portion in a balanced manner.

  According to the light bulb shaped fluorescent lamp according to claim 3, in addition to the effect of the light bulb shaped fluorescent lamp according to claim 1 or 2, a flame retardant is provided on the inner surface of one end of the holder. Can be less affected by heat.

  According to the light bulb shaped fluorescent lamp of claim 4, in addition to the effect of the light bulb shaped fluorescent lamp according to any one of claims 1 to 3, in order to provide a locking structure for locking to the cover on one end side of the globe, The glove can be easily assembled to the cover and the assemblability can be improved. If the lock is released, the glove can be separated and the recyclability can be improved.

  According to the lighting fixture of Claim 5, the lighting fixture which has an effect | action of the bulb-type fluorescent lamp of any one of Claim 1 thru | or 4 can be provided.

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

  1 is a cross-sectional view of a bulb-type fluorescent lamp, FIG. 2 is a perspective view showing the other end side of the holder of the bulb-type fluorescent lamp, FIG. 3 is a perspective view showing one end side of the holder, and FIG. FIG. 5 is a cross-sectional view of a lighting fixture using a bulb-type fluorescent lamp.

  In FIG. 1, reference numeral 11 denotes a bulb-type fluorescent lamp. The bulb-type fluorescent lamp 11 includes a cover 13 having a base 12 attached to one end in the axial direction (height direction) of the bulb-type fluorescent lamp 11, and the cover 13. An arc tube 14 supported on the other end side, a holder 15 that supports one end side of the arc tube 14 and attached to the other end side of the cover 13, and the other end side of the cover 13 that accommodates the arc tube 14 And a lighting device 17 housed inside the base 12, the cover 13 and the holder 15. And the rated electric power is formed in a size and appearance close to those of general lighting bulbs such as incandescent bulbs of 40W type, 60W type, and 100W type. This general lighting bulb is defined in JIS C 7501.

  The base 12 is, for example, an Edison type E26 type, and includes a cylindrical shell 21 having a thread and an eyelet 23 provided on the top of one end side of the shell 21 via an insulating portion 22. . The other end side of the shell 21 is fixed to the one end portion of the cover 13 by caulking or bonding.

  Further, the cover 13 is formed of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT), and a cylindrical base mounting portion 26 to which the shell 21 of the base 12 is attached is formed on one end side, and the other end side is formed. An expanded annular cover 27 is formed on the inner side, and a plurality of locking claws 28 for attaching the globe 16 are formed inside the cover 27. On one end side of the cover 13, a pair of substrate holding portions 29 are projected from a position offset from the center of the cover 13.

  In addition, the arc tube 14 has one bulb 31, and the bulb 31 is formed with a spiral portion 32 and a pair of electrode sealing end portions 33 at both ends.

  In the spiral portion 32, the central region of the valve 31 is bent so that one valve 31 is divided into two equal parts, and both ends of the valve 31 are spirally formed with the bent central region of the valve 31 as a top portion 34. It is formed in a curved double spiral shape. The spiral portion 32 is formed by bending a single straight tubular valve 31 softened by heating and softening, so that the valve 31 is divided into two equal parts in the central region, and the bent central region is further divided into the top 34. As shown, the both ends of the bulb 31 are wound along a groove formed in a spiral shape of the mold to form a spiral shape. Further, the shape of the spiral portion 32 is such that the maximum diameter portion in the direction perpendicular to the axis is larger than the opening size on one end side of the globe 16 and is a shape that follows the shape of the globe 16 and is in the middle portion in the axial direction. It is formed to have a substantially spherical shape whose diameter is larger than the diameter on one end side and the top 34 side. The coldest part may be formed by bulging the top part 34 of the spiral part 32 in the direction of the other end.

  The pair of electrode sealing end portions 33 protrudes in parallel with the axial direction toward one end direction opposite to the top portion 34.

  For example, a three-wavelength phosphor film is coated on the inner surface of the bulb 31.

  The bulb 31 is filled with a noble gas such as argon (Ar), neon (Ne), or krypton (Kr), or a gas containing mercury.

  A pair of electrodes 35 is sealed at the pair of electrode sealing ends 33 of the bulb 31 by, for example, a flare stem. Each electrode 35 has a filament coil suspended between a pair of wells sealed in a flare stem. The pair of wells is connected to a pair of wires that are led out from the flare stem and connected to the lighting device 17.

  Each electrode sealing end 33 of the bulb 31 is provided with a cylindrical thin tube 36 called an exhaust pipe attached to the flare stem so as to communicate therewith. Each of these capillaries 36 is sequentially sealed by fusing in the manufacturing process of the arc tube 14, and the arc tube 14 is exhausted through an unsealed part of each capillaries 36, and a sealed gas is enclosed. After the replacement, the capillary 36 is sealed by fusing.

  One narrow tube 36 is formed long so that the tip portion extends to the inside of the base 12, and a main amalgam 37 as an amalgam is enclosed in the tip portion when sealed. The main amalgam 37 is an alloy composed of bismuth, tin and mercury, is formed in a substantially spherical shape, and has an action of controlling the mercury vapor pressure in the arc tube 14 within an appropriate range. In addition, as the main amalgam 37, what was formed with the alloy which combined indium, lead, etc. other than bismuth and tin may be used. Further, an auxiliary amalgam having a mercury adsorption / release action may be attached to the wells of the electrode 35.

  The holder 15 is formed of a heat-resistant synthetic resin material such as polybutylene terephthalate (PBT), for example, and has a disk-shaped substrate portion 41 and a cylindrical shape protruding from the peripheral portion of the substrate portion 41 to one end side. A cylindrical portion 42 is provided.

  In order to attach the holder 15 to the globe 16, a plurality of stopper portions 43 project from the circumferential surface of the cylindrical portion 42, and a plurality of mounting pieces 44 project from the cylindrical portion 42 to one end side. Has been. A locking claw portion 45 projects from the outer surface of the tip of the mounting piece 44.

  Inside the holder 15, a groove-like substrate holding portion 46 is formed along the center line of the holder 15 at a position offset from the center line of the holder 15.

  The substrate portion 41 of the holder 15 has a convex portion 47 protruding from the central region of the substrate portion 41 toward the other end side, and a pair of electrode sealing end portions 33 of the arc tube 14 are inserted from the axial direction. A pair of ribs 48 to be fitted project from the convex portion 47 continuously.

  The convex portion 47 is formed in an approximately 8 shape in which the outer shape in the direction intersecting the direction in which the pair of ribs 48 is arranged is a convex arc shape, and the direction in which the pair of ribs 48 is arranged is formed in a concave arc shape. . Due to the convex portion 47, a concave portion 49 having the same shape is formed on one end surface of the holder 15. The external dimensions of the convex portion 47 in a direction intersecting with the direction in which the pair of ribs 48 are arranged protrude from the rib 48 and are separated from the outer peripheral portion of the holder 15 to the inner side. On the other end surface of the convex portion 47, a heat shield engaging portion 50 is projected along the outside of each rib 48.

  The pair of ribs 48 protrudes at the same height as the convex portion 47, and both end portions extend from the convex portion 47 toward the outer peripheral side of the holder 15 and are open to the other end side and the outer peripheral side of the holder 15. It is formed in a substantially C shape. In the central portion of the pair of ribs 48, the substrate portion 41 is formed with a pair of insertion holes 51 through which the thin tubes 36 of the arc tube 14 and wires are inserted.

  A pair of electrode sealing end portions 33 of the arc tube 14 are inserted into the pair of ribs 48 to support one end surface of these electrode sealing end portions 33 and the inner surface facing the rib 48, and calcium oxide, silica, alumina Alternatively, they are bonded and fixed by an adhesive 52 such as cement mainly composed of these mixed compounds.

  The inner surface of one end side of the holder 15 is provided with a flame retardant such as cement or silicone resin mainly composed of calcium oxide, silica, silicon compound and the like after assembly with the arc tube 14.

  The globe 16 is made of a transparent or light diffusing resin material such as polycarbonate, acrylic, polyethylene, etc., and is formed into a smooth curved surface close to the shape of a glass bulb of a general lighting bulb such as an incandescent bulb. That is, the globe 16 has a spherical portion 61 formed on the top side which is the other end side, and a reduced diameter portion 62 gradually reduced in diameter from the spherical portion 61 on one end side. An opening end 64 having an opening 63 is formed on one end side of the reduced diameter portion 62, and the opening end 64 is fitted inside the cover 13. The opening end portion 64 is formed with a plurality of locking holes 65 as a locking structure for locking with the plurality of locking claw portions 28 of the cover 13. Further, an abutting portion 66 with which the stopper portion 43 of the holder 15 abuts is formed inside the opening end portion 64, and the stopper portion 43 of the holder 15 is disposed at one end side of the opening end portion. A locking groove 67 is formed in which the plurality of locking claw portions 45 of the holder 15 are locked in a state of contacting with each other.

  The globe 16 is divided into two parts, the top side glove part 68 and the reduced diameter part side glove part 69 in the axial direction of the globe 16 with the maximum diameter part of the spherical part 61 in the direction perpendicular to the axial direction of the globe 16 as a dividing line. Has been. The top-side glove part 68 and the reduced-diameter part-side glove part 69 are combined so as to cover the arc tube 14 supported by the holder 15 from the axial direction and are fixed by, for example, ultrasonic welding.

  Due to the divided structure of the globe 16, the arc tube 14 having the spiral portion 32 having a larger diameter than the opening 63 of the globe 16 can be accommodated in the globe 16. Moreover, since the dividing line of the globe 16 is perpendicular to the axial direction of the globe 16, when viewed from the top side of the globe 16, the dividing line is not visible, and the appearance can be secured, and when lit, The shadow of the dividing line becomes difficult to be projected, and the aesthetic appearance during lighting can be secured.

  The lighting device 17 includes a substrate 71, and a plurality of electronic components 73 constituting the lighting circuit 72 are mounted on both side surfaces of the substrate 71. The substrate 71 is vertically arranged along the direction of the center axis of the cover 13 and the holder 15 by having both side edges of the substrate 71 inserted and engaged with the substrate holding portion 29 of the cover 13 and the substrate holding portion 46 of the holder 15. In addition, the cover 13 and the holder 15 are disposed at positions offset with respect to the center line. In addition, four wrapping pins 74 are provided on the substrate 71 so as to project and connect a pair of wires of each electrode 35 of the arc tube 14. Further, a part of the electronic component 73 may be disposed in the recess 49 of the holder 15.

  Next, in order to assemble the bulb-type fluorescent lamp 11, the electrode sealing end portions 33 of the arc tube 14 are passed through the heat shields 81, and the thin tubes 36 and the wires protruding from the electrode sealing end portions 33 of the arc tube 14 are connected. The electrode sealing end portions 33 of the arc tube 14 are inserted and fitted inside the ribs 48 of the holder 15 through the insertion holes 51 of the holder 15. At this time, by previously injecting an adhesive 52 such as cement mainly composed of Ca and Si into the inside of each rib 48 of the holder 15, each electrode sealing end portion 33 of the arc tube 14 to be inserted and fitted. The adhesive 52 is crushed and spread between the peripheral surface and the inner side of the rib 48, and the adhesive 52 comes into contact with each other over a relatively wide area to be fixed. Further, since the rib 48 has the same height as the convex portion 47 and extends from the convex portion 47 toward the outer peripheral side of the holder, the protrusion of the adhesive 52 can be reduced.

  After the arc tube 14 and the holder 15 are assembled, a flame retardant material such as cement or silicone resin mainly composed of calcium oxide or silica (even if the same as the adhesive 52 is used) so as to cover the entire inner surface of one end of the holder 15. Apply). At this time, a flame retardant is applied to the end face of the electrode sealing end portion 33 of the arc tube 14 through the insertion hole 51, and the fixing strength between the arc tube 14 and the holder 15 is improved.

  The substrate 71 is inserted inside the holder 15, and each wire of the arc tube 14 drawn out inside the holder 15 is wound around and connected to each wrapping pin 74 of the substrate 71.

  The top side glove part 68 and the reduced diameter part side glove part 69 of the glove 16 are combined and fixed so as to cover the arc tube 14 supported by the holder 15 from the axial direction. Note that only the reduced-diameter portion-side globe portion 69 may be attached to the holder 15 and the top-side globe portion 68 may be fixed in combination with the reduced-diameter portion-side globe portion 69 in any subsequent or final step.

  In order to attach the holder 15 to the reduced diameter part side globe part 69, the stopper part 43 of the holder 15 is inserted into the reduced diameter part by inserting one end side of the holder 15 from the large diameter side of the reduced diameter part side globe part 69. While abutting on the abutment portion 66 of the side glove portion 69, each locking claw portion 45 of the holder 15 is locked in each locking groove 67 of the reduced diameter portion side glove portion 69, and these are mechanically fixed. .

  Thereafter, the cover 13 is inserted from one end side of the substrate 71 and combined with the outside of the opening end portion 64 on one end side of the reduced diameter portion side globe portion 69, and each locking claw portion 28 of the cover 13 is combined with the reduced diameter portion side globe portion 69. These are locked in the respective locking holes 65 to mechanically fix them.

  The substrate 71 and the shell 21 and the eyelet 23 of the base 12 are respectively connected by wiring, and the shell 21 is fixed to the base mounting portion 26 of the cover 13 by caulking or bonding.

  The specific configuration of the bulb-type fluorescent lamp 11 formed in this way is as follows. The total length in the axial direction of the bulb-type fluorescent lamp 11 is 109 mm, the maximum diameter of the globe 16 is 60 mm, the maximum diameter of the arc tube 14 is 54 mm, the axial dimension of the arc tube 14 is 64 mm, and the discharge of the arc tube 14 The path length is 360 to 610 mm (the discharge path length is 476 mm when the diameter of the bulb 31 is 8 mm, and the discharge path length is 374 mm when the diameter is 9 mm), and the appearance approximates that of a general lighting bulb. Can be used instead.

  Therefore, as shown in FIG. 5, the bulb-type fluorescent lamp 11 can be used in a lighting fixture 91 that is a downlight. The lighting fixture 91 has a fixture main body 92, and a socket 93 and a reflector 94 are mounted in the fixture main body 92, and the bulb-type fluorescent lamp 11 is attached to the socket 93.

  In the bulb-type fluorescent lamp 11, the pair of electrode sealing ends 33 of the arc tube 14 are fitted inside the pair of ribs 48 projecting from the holder 15, and the electrode is formed by the adhesive 52 inside the rib 48. Since the sealing end 33 can be firmly fixed, and the rib 48 can be continuously protruded from the projecting portion 47 protruding from the central region of the holder 15, the strength of the rib 48 itself can be improved. The fixing strength can be secured, and the light extraction efficiency can be improved as compared with the conventional case where the electrode sealing end portion 33 is inserted into the holder 15.

  The outer shape of the convex portion 47 in the direction intersecting with the direction in which the pair of ribs 48 of the holder 15 is arranged protrudes from the rib 48 and is provided away from the outer peripheral portion of the holder 15, so that the strength of the rib 48 is improved. And preventing the light from being blocked by the protrusion 47 can be balanced.

  In addition, since a flame retardant is provided on the inner surface of one end of the holder 15, it is possible to reduce the influence of the holder 15 due to the heat generated by the lighting device 17.

  The flame retardant material may be formed by applying a cement or silicone resin mainly composed of calcium oxide, silica, or the like, or a separate flame retardant material having a plate shape or a cylindrical shape. . As the separate flame retardant material, for example, a resin made of a flame retardant grade (94V-5 level) higher than the holder 15 such as polyether India or liquid crystal polymer, or a metal such as aluminum can be used.

  In addition, since a locking structure that locks the cover 13 on the one end side of the globe 16 is provided, the globe 16 can be easily assembled to the cover 13 to improve the assembly, and if the locking is released, the globe 16 is separated. And improve recyclability.

  Note that the locking structure for locking to the cover 13 on one end side of the globe 16 may be any of a screw screw structure, a combination of a screw screw structure and an uneven fitting structure. In the case of a screwed structure, it is preferable to use a reverse screw with respect to the direction in which the bulb-type fluorescent lamp 11 is attached to the socket 93.

It is sectional drawing of the lightbulb-type fluorescent lamp which shows one embodiment of this invention. It is a perspective view which shows the other end side of the holder of a bulb-type fluorescent lamp same as the above. It is a perspective view which shows the one end side of a holder same as the above. It is sectional drawing which shows the assembly structure of the holder and cover of a bulb-type fluorescent lamp same as the above. It is sectional drawing of the lighting fixture using a bulb-type fluorescent lamp same as the above.

Explanation of symbols

11 Bulb-type fluorescent lamp
12 base
13 Cover
14 arc tube
15 Holder
16 Globe
17 Lighting device
31 Valve
33 Electrode sealing edge
35 electrodes
47 Convex
48 Ribs
52 Adhesive
65 Locking hole as locking structure
91 Lighting equipment
92 Instrument body
93 socket

Claims (5)

A bulb having a pair of electrode sealing ends on one end side and an arc tube having a pair of electrodes sealed on the pair of electrode sealing ends;
A convex portion protrudes from the central region toward the other end side, and a pair of ribs that fit the pair of electrode sealing ends of the arc tube continuously protrude from the convex portion, and the inside of the rib A holder for fixing the electrode sealing end to the adhesive with an adhesive;
A cover having a base attached to one end and a holder supported on the other end;
A lighting device housed in a cover;
A bulb-type fluorescent lamp characterized by comprising: The light bulb according to claim 1, wherein an outer shape of the convex portion in a direction intersecting with a direction in which the pair of ribs of the holder intersects is provided so as to protrude from the rib and to be separated from the outer peripheral portion of the holder. Shaped fluorescent lamp. The light-emitting fluorescent lamp according to claim 1 or 2, wherein a flame retardant is provided on an inner surface of one end side of the holder. The bulb-type fluorescent lamp according to any one of claims 1 to 3, further comprising a glove that houses the arc tube and is provided with a locking structure that locks the cover on one end side. An instrument body;
A socket attached to the instrument body;
A bulb-type fluorescent lamp according to any one of claims 1 to 4 connected to a socket;
The lighting fixture characterized by comprising.

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