JP2007250215A - Compact self-ballasted fluorescent lamp and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact self-ballasted fluorescent lamp capable of improving adhesive strength between an arc tube and a holder, and preventing deterioration of adhesive material in accompany with an increase in temperature of the arc tube, and to provide a lighting device using the lamp. <P>SOLUTION: The lamp includes a bent arc tube formed so that a pair of ends having electrodes respectively are positioned on one end side, a holder having two or more recesses for housing at least the pair of ends of the arc tube for supporting the acr tube by adhering to the respective end parts, a first adhesive material with relatively high heat resistance provided so as to adhere an outer surface of the end on a side where the respective end parts face with each other and the holder, a second adhesive material with relatively high hardness provided so as to adhere an outer surface of the end on a surface which does not face with each other and the holder, a base provided on one end side of the holder, and a lighting device for lighting the arc tube, housed between the holder and the base. This structure can improve the adhesive strength of the arc tube and the holder as compared with a conventional lamp. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an arc tube and a light bulb-type fluorescent lamp provided with a lighting device for lighting the arc tube, and an illumination device using the light bulb-type fluorescent lamp.

  2. Description of the Related Art Conventionally, a bulb-type fluorescent lamp has a bent arc tube formed by connecting a plurality of substantially U-shaped bulbs so as to form, for example, one continuous discharge path, and a holder that supports one end of the arc tube A cover having a base attached to one end and supporting the arc tube via a holder on the other end, a lighting device housed in the cover, and a glove that covers the arc tube and is attached to the other end of the cover I have.

In the conventional bulb-type fluorescent lamp, the holder that supports one end side of the arc tube has a plurality of bulb insertion holes provided with an inner diameter larger than the outer diameter of the bulb end of each bulb of the arc tube, The bulb end portions of the bulbs of the arc tube are inserted into the bulb insertion holes and bonded and fixed with a silicone adhesive (for example, see Patent Document 1).
JP 2000-21351 (page 6, FIG. 3)

  However, since the silicone adhesive has a small hardness of about 20 to 40, the adhesive strength is not sufficient, and when the lamp is subjected to a strong impact, the arc tube may bend and the arc tube may be damaged. On the other hand, there is also known a fluorescent lamp using a cement material mainly composed of calcium (Ca) and phenol resin, whose hardness is higher than that of a silicone adhesive, in order to increase the adhesive strength. However, in recent years, fluorescent lamps are becoming smaller and higher in output, so that the temperature during lighting of the end of the arc tube may rise and exceed the heat resistance temperature of the cement material. For this reason, if the fluorescent lamp is kept lit, the cement material deteriorates, and there is a possibility that problems such as the arc tube dropping off from the holder may occur.

  The present invention has been made in view of the above problems, and has improved the adhesive strength between the arc tube and the holder, and suppresses the deterioration of the adhesive material accompanying the temperature rise of the arc tube, and the bulb-type fluorescent lamp. It aims at providing the illuminating device using a lamp | ramp.

  A bulb-type fluorescent lamp according to claim 1, wherein a bent arc tube formed such that a pair of ends each having an electrode is positioned on one end side; and at least a pair of ends of the arc tube are fixed to emit light. A holder for supporting the tube; a first adhesive material having relatively high heat resistance provided to bond the holder to the outer peripheral surface of the end portion facing each other; and each end portion A second adhesive material having a relatively high hardness provided so that the end surface on the non-facing surface side and the holder are bonded; a base provided on one end side of the holder; and between the holder and the base And a lighting device for lighting the arc tube.

  The bent arc tube includes a shape in which a plurality of U-shaped bulbs are arranged in parallel, a shape bent in a spiral, and the like. The pair of electrode end portions refers to the end portion where the electrodes are sealed among the end portions of each U-shaped bulb in the case where a plurality of U-shaped bulbs are arranged side by side.

  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 lighting device includes an inverter circuit mainly composed of electronic components that apply high-frequency power of 10 kHz or more to the arc tube to light the arc tube.

  The outer peripheral surface of the electrode end portion of the arc tube on which the first adhesive is formed is close to the electrode, and thus becomes hot during lighting. In particular, the side where the ends face each other is surrounded by the arc tube, so that it is difficult to dissipate heat and is likely to have a high temperature. Therefore, the first adhesive is a relatively high heat-resistant adhesive compared to the second adhesive. On the other hand, since the end surface of the electrode end portion is separated from the electrode, the temperature during lighting does not increase compared to the outer peripheral surface. For this reason, although the heat resistance is not high for the second adhesive that adheres the end surfaces of the electrode end portions, an adhesive having a higher hardness than the first adhesive can be used.

  The bulb-type fluorescent lamp according to claim 2 is the bulb-type fluorescent lamp according to claim 1, wherein the holder is integrally formed toward the other end of the arc tube so as to be inserted between the insides of the respective ends. It has the formed protrusion, and this protrusion and the edge part of the said arc_tube | light_emitting_tube are adhere | attached by the said 1st adhesive material.

  The bulb-type fluorescent lamp according to claim 3, wherein the first adhesive is a silicone resin having a heat resistant temperature of 180 ° C. or higher, the second adhesive is mainly composed of at least a phenol resin, and has a hardness of 50 or higher. It is characterized by being a cement material.

  The hardness is defined by the measurement method of Japanese Industrial Standard “JIS K 6301”, and the hardness of 50 indicates 50 Hs. Moreover, as long as it shows a value equivalent to the hardness defined here, it may be defined by other measurement methods.

  The lighting device according to claim 4 comprises: a lighting fixture body; a socket attached to the lighting fixture body; and the bulb-type fluorescent lamp according to any one of claims 1 to 3 attached to the socket. It is characterized by being.

  According to the bulb-type fluorescent lamp of the first aspect, the outer surface of the end portion on the side where the end portions of the arc tube oppose each other and the holder are bonded by the first adhesive having relatively high heat resistance. For this reason, it can suppress that an adhesive material deteriorates with a heat | fever. In addition, the outer surface of the end portion on the non-facing surface side of each end portion and the holder are bonded by a second adhesive having a relatively high hardness. For this reason, compared with the method of fixing only with a 1st adhesive material, adhesive strength can be raised. Moreover, since it adhere | attaches avoiding the surface side which each edge part opposes, it can suppress that a 2nd adhesive material deteriorates with a heat | fever.

  According to the light bulb shaped fluorescent lamp of claim 2, in addition to the effect of the light bulb shaped fluorescent lamp of claim 1, toward the other end side of the arc tube so as to be inserted between the inner ends of each electrode. Since the integrally formed protrusion is provided on the holder, the holder and the outer peripheral surface of the end of the arc tube can be firmly fixed. Moreover, since an adhesive material should just be formed between this protrusion and the edge part outer peripheral surface of an arc_tube | light_emitting_tube, the usage-amount of an adhesive material can be decreased. Furthermore, the components of the lighting device can be arranged in the space inside the protrusion, and the size can be reduced.

  According to the bulb-type fluorescent lamp of claim 3, the first adhesive is a silicone resin including at least one of calcium (Ca) and silicone (Si) and having a heat resistant temperature of 180 ° C. or higher. For this reason, even if the temperature of the end of the arc tube rises, the adhesive does not deteriorate due to heat. The second adhesive material is a cement material that has at least one of calcium (Ca) and a phenol resin as a main component and has a hardness of 50 or more. For this reason, the arc tube and the holder can be more firmly fixed.

It is possible to provide a lighting device having the function of

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

  1 to 9 show a first embodiment. 1 is a cross-sectional view of bulb-type fluorescent lamps as viewed from the direction in which bulbs are arranged, FIG. 2 is a cross-sectional view of bulb-type fluorescent lamps as viewed from a direction intersecting with the direction of bulbs, and FIG. 4 is a perspective view of the inside of the holder combined with the arc tube of the bulb-type fluorescent lamp, and FIG. 5 is a bottom view of the bulb-type fluorescent lamp as viewed from one end side of the holder with the cover and globe removed. FIG. 6 is a bottom view of the bulb-type fluorescent lamp viewed from one end side of the holder with the cover, globe and lighting device removed, FIG. 7 is a plan view of the bulb-type fluorescent lamp holder seen from the other end side, and FIG. FIG. 9 is a schematic view of an illuminating device using a bulb-type fluorescent lamp, and FIG. 9 is a cross-sectional view seen from the other end side of a holder to which an arc tube of a bulb-type fluorescent lamp is bonded and fixed.

  1 and 2, reference numeral 11 denotes a light bulb-type fluorescent lamp. The light bulb-type fluorescent lamp 11 is supported by a cover 13 having a base 12 at one end in the height direction (tube axis direction) and the other end of the cover 13. The arc tube 14, the holder 15 supported on one end side of the arc tube 14 and attached to the cover 13, the globe 16 covering the arc tube 14 and covering the periphery of the holder 15 on one end side and attached to the cover 13 The lighting device 17 is housed inside the base 12 and the cover 13. And it is formed in the external appearance close | similar to the light bulbs for general illumination, such as a 40W type, 60W type, and 100W type incandescent lamp. This general lighting bulb is defined in JIS C 7501.

  The base 12 is an Edison type E26 type or the like, 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 of the shell 21 is put on one end of the cover 13 and fixed by an adhesive or caulking.

  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 portion 27 is formed on the inner side, and a holder attaching portion 28 for attaching the holder 15 is formed on the inner side.

  The arc tube 14 has at least three U-shaped bent valves 31, 32, 33, and these valves 31, 32, 33 are sequentially connected by a communication pipe 34 to form one continuous discharge path. 35 is formed. Each communication pipe 34 is formed by joining openings formed by blowing and breaking the vicinity of the end where the valves 31, 32, and 33 are connected to each other.

  The bulbs 31, 32, and 33 are formed in a substantially U shape in which a tube body having a substantially cylindrical cross section made of glass having a tube outer diameter of 3 to 8 mm is curved at an intermediate portion and has a top portion. That is, the valves 31, 32, and 33 include a bent portion that is curved and a pair of straight pipe portions that are continuous with the bent portion and are parallel to each other. The height of the central valve 32 is higher than the height of the valves 31 and 33 on both sides. The bulbs 31, 32, 33 are arranged in parallel so that their U-shaped surfaces face each other in parallel, and the maximum width b1 in the width direction intersecting the height direction of the arc tube 14 is 30 mm. It is formed as follows.

  For example, a three-wavelength phosphor is formed on the inner surface of the arc tube 14, and the arc tube 14 is filled with a noble gas such as argon (Ar) or krypton (Kr), or a gas containing mercury. .

  A pair of electrodes 36 are sealed with stem seals or pinch seals at one end portions of the bulbs 31 and 33 located on both ends of the discharge path 35. Each electrode 36 has a filament coil, and this filament coil is supported by a pair of linear wells. Each well is, for example, a pair of wires 37 that are led out from one end of the bulbs 31 and 33 on both sides and connected to the lighting device 17 via a jumet wire sealed at one end of the bulbs 31 and 33 on both sides. (See FIG. 4).

  Cylindrical narrow tubes 38 that are sealed by stem seals or pinch seals and are also called exhaust pipes communicate with each electrode end where the electrodes 36 of the valves 31 and 33 on both sides are sealed, and both ends of the valve 32 on the center. Projected to Each of these capillaries 38 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 of the capillaries 38, and an enclosed gas is enclosed. After the replacement, the unsealed part of each capillary 38 is sealed by fusing.

  Of the narrow tubes 38 at both ends of the central valve 32, one narrow tube 38 is formed in a long shape so that the tip extends to the inside of the base 12 and is in a straight line parallel to the straight tube portion of the valve 32. The main amalgam 39 as an amalgam is encapsulated at the tip portion when sealing. The main amalgam 39 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 39, you may use what was formed with the alloy which combined indium, lead, etc. other than bismuth and tin. Further, auxiliary amalgam having mercury adsorption / release action is attached and sealed in the wells of the electrodes 36 of the bulbs 31 and 33 at both ends. Further, an auxiliary amalgam similar to the auxiliary amalgam provided in the valves 31 and 33 at both ends is also sealed at the other end of the central valve 32.

  The arc tube 14 includes a pair of electrode side end portions 40 in which a pair of electrodes 36 of the bulbs 31, 32, 33 are sealed, and bulb end portions 31a, 32a, 33a of the bulbs 31, 32, 33 in the height direction. Located on one end side and on the same circumference around the center of the arc tube 14, the end faces of the bulb end portions 31a, 32a, 33a are arranged on the same plane.

A cylindrical tube portion 43 protruding from the peripheral edge to one end side is provided.

  A protrusion 44 inserted between the bulb end portions 31a, 32a, and 33a of the bulbs 31, 32, and 33 is formed at the center of the substrate portion 42, and the arc surface of the arc tube 14 is formed on the peripheral surface of the projection 44. Concave portions 45 are formed as a plurality of valve mounting portions in which the inner peripheral surface portions of the respective valve end portions 31a, 32a, 33a facing the central portion are opposed to each other. Each recess 45 is formed in a curved surface that is substantially concentric with the curved surface of the peripheral surface of each valve end 31a, 32a, 33a, and a hole 46 that communicates with the inside and outside of the projection 44 is formed in the center. Has been. The sharp protrusion formed at the boundary between the adjacent recesses 45 does not protrude outwardly of the arc tube 14 from between the adjacent bulb ends 31a, 32a, 33a, and the adjacent bulb ends 31a, 32a. , 33a is located between the inner peripheral portions.

  An annular wall 47 is formed on the inner side of the protrusion 44 so as to be opposed to the inner side of the recess 45 and the hole 46 on the peripheral surface portion of the protrusion 44, and around the protrusion 44 on the outer side of the wall 47. An annular gap portion 48 is formed between the concave portion 45 and the hole portion 46 of the surface portion, and a space portion 49 is formed inside the wall portion 47, and the gap portion 48 and the space portion 49 are on one end side of the holder 15. An opening is formed inside.

  The end face of each valve end 31a, 32a, 33a disposed in each recess 45 of the projection 44 is abutted against the substrate portion 42.

A contact portion 50 is formed in contact therewith. Corresponding to the position of each contact part 50, a positioning part 51 for receiving and positioning each valve end 31a, 32a, 33a contacting each contact part 50 is formed, that is, at the bottom of each positioning part 51 Each contact portion 50 is formed. The positioning part 51 is opened by cutting out the outer peripheral part of the substrate part 42, and can position the valve end parts 31a, 32a, 33a and emit light emitted from the valve end parts 31a, 32a, 33a. It is formed to a height that does not obstruct. In addition, an insertion hole 52 is formed in the center of each contact portion 50 through which the wires 37 and the thin tubes 38 protruding from the end surfaces of the valve end portions 31a, 32a, 33a are inserted. Is smaller than the outer diameter of the valve end portions 31 a, 32 a, 33 a, so that the valve end portions 31 a, 32 a, 33 a do not enter the insertion hole 52.

  A claw portion 53 that is attached to the holder attachment portion 28 of the cover 13 is formed at one end portion of the cylindrical portion 43. A pair of substrate attachment portions 55 having a pair of substrate attachment grooves 54 facing each other at a position offset from the center line of the holder 15 are formed inside the cylindrical portion 43. The substrate mounting groove 54 is formed in parallel with the center line of the holder 15 and is formed at one end portion side of the cylindrical portion 43. In addition, a pair of notches 56 are formed in the cylinder portion 43 on the opposite side to the side where the pair of substrate mounting portions 55 are formed offset.

  The lighting device 17 includes a substrate 64 on which a plurality of electronic components 66 constituting the lighting circuit 65 are mounted. The substrate 64 is formed in a rectangular shape having a width dimension that allows insertion into the inside of the base 12 and has a height that is longer than the width dimension, and both side edges of the substrate 64 are attached to the pair of substrates of the holder 15. It is inserted into and engaged with the groove 54 and is arranged vertically along the direction of the central axis of the holder 15 and is arranged at a position offset from the center line of the holder 15. In addition, the position of the substrate 64 in the direction intersecting the height direction is temporarily fixed by the substrate mounting portion 55 of the holder 15, and the base 12 and the holder 15 are connected by connecting the wire 37 of the arc tube 14 and the wrapping pin 67. The position in the height direction is positioned and held by sandwiching between the two.

  Each valve end 31a, 32a, 33a and the holder 15 are bonded and fixed by a first adhesive 57a and a second adhesive 57b. Silicone resin is used for the first adhesive 57a, and the holder is bonded to the outer peripheral surface of the end on the side where the valve end portions 31a, 32a, 33a face each other. The second adhesive material 57b is made of a cement material mainly composed of phenol resin and having a hardness of 50Hs or more, and the non-opposing surface side of each bulb end portion 31a, 32a, 33a (outside of the arc tube 14). Side) and the holder 15 are bonded together.

  Hereinafter, the bonding process between the valve end portions 31a, 32a, 33a and the holder will be described. First, the protrusions 44 of the holder 15 are inserted between the inner ends of the bulb end portions 31a, 32a, and 33a at the central portion on one end side of the arc tube 14, whereby the bulb end portions 31a, 32a, and 33a are inserted into the concave portions 45, respectively. To place. Then, the end surfaces of the valve end portions 31a, 32a, 33a are brought into contact with the contact portions 50 and combined. At this time, by receiving the valve end portions 31a, 32a, 33a in the positioning portion 51, the positions of the end surfaces of the valve end portions 31a, 32a, 33a can be reliably positioned at the positions of the contact portions 50. As shown in FIGS. 1, 2, and 8, for example, a tip of a needle-like jig (not shown) for injecting the first adhesive material 57 a is inserted into the gap 48 from the inside of the holder 15, and the jig The first adhesive material 57a is discharged from the front end side of the sheet. The first adhesive 57a discharged into the gap 48 is filled in the gap 48 and goes out of the protrusion 44 through the hole 46. Further, the gas is injected into the gap while proceeding along the gap between the inner peripheral surface of the valve end portions 31a, 32a, 33a and the recess 45. Then, by discharging the first adhesive material 57a, the jig is made to make one turn along the gap portion 48, so that the inner portions of the peripheral surfaces of all the valve end portions 31a, 32a, and 33a and the recesses 45 are spaced from each other. Similarly, the first adhesive material 57a is injected. At this time, the first adhesive 57a that has come out of the protrusion 44 through the hole 46 enters along the gap between the inner peripheral surface of the valve end portions 31a, 32a, 33a and the recess 45. Applied. And the 1st adhesive material 57a is formed in the surrounding surface inner side part of valve | bulb edge part 31a, 32a, 33a, and hardly forms in the surrounding surface outer side. Further, the first adhesive 57a penetrates into the end surfaces of the valve end portions 31a, 32a, 33a through the gap with the recess 45, and is formed in a region about half of the inside direction. In this manner, the inner peripheral surface portions of the valve end portions 31a, 32a, and 33a and the inner half of the end surface can be bonded and fixed to the recess 45, the wall portion 47, and the positioning portion 51 of the protrusion 44 of the holder 15.

  Next, the second adhesive material 57b is discharged from the inside of the holder 15 so as to make a round so as to sequentially pass through the respective insertion holes 52. At this time, since the first adhesive material 57a formed earlier is formed on the end surface of the bulb end portions 31a, 32a, 33a on the sides (center side of the arc tube 14) facing each other, the second This adhesive material 57b can fix the holder 15 to the region of the end face on the outer side of the arc tube 14 with respect to the center of each bulb end portion 31a, 32a, 33a.

  FIG. 9 is a schematic view showing an application region of the adhesive material of the holder 15, where the region where the first adhesive material 57 a is formed is represented as 57 a ′, and the region where the second adhesive material 57 b is formed is represented as 57 b ′. ing.

  Here, the second adhesive 57b is provided to improve the fixing strength between the arc tube and the holder. In order to improve the fixing strength of the adhesive, it is common to increase the hardness by including a phenol resin in the adhesive. However, this phenolic resin generally has a low heat-resistant temperature and deteriorates when the temperature rises to about 120 ° C. In recent years, since lamps have become smaller and have higher output, the temperature of the lamp can reach 150 ° C. during lighting, which may exceed the heat resistance temperature of phenol resin. On the other hand, conventionally used silicone adhesives have a high heat-resistant temperature as high as 200 ° C., but their adhesion strength is weak because of their low hardness. Therefore, the present inventors examined a method for increasing the fixing strength between the arc tube and the holder and suppressing the adhesive material from being deteriorated by heat. As a result, for example, in a bulb-type fluorescent lamp having a plurality of U-shaped bent bulbs, the end face of each bulb end is 8 to 25 mm, preferably 10 to 20 mm away from the electrode, so that the temperature is relatively 110 to 120 ° C. Was found to be low. Further, it was found that the outside is easy to radiate heat with respect to the center of each valve end, so that the temperature is less likely to rise than the inside. Therefore, a bulb-type fluorescent light in which a first adhesive material 57a made of silicone resin is formed on the opposite surface side of each bulb end portion and a second adhesive material 57b made of cement material containing phenol resin is formed on the end surface of each bulb end portion. Experimented with a lamp. According to this configuration, it was confirmed that deterioration due to heat hardly occurs even when the lamp is lit for a predetermined period, and the fixing strength between the arc tube 14 and the holder 15 is improved. Furthermore, since the inner peripheral surface side of each bulb end is fixed with an adhesive having a low hardness, there is also an effect of relieving stress on the communication tube 34 that occurs due to thermal contraction or impact of the arc tube 14.

  Next, the assembly process of the lamp after the arc tube 14 is fixed to the holder 15 will be described.

The side edges of the substrate 64 are inserted into the pair of substrate mounting grooves 54 of the holder 15, the substrate 64 is inserted inside the holder 15, and each wire 37 of the arc tube 14 drawn out inside the holder 15 is connected to the substrate 64. Each of the wrapping pins 67 is wound and connected (illustration of this winding state is omitted). Subsequently, the holder 15 and the cover 13 are combined and combined. Subsequently, an electric wire (not shown) connected in advance from the input part side of the substrate 64 is connected to the shell 21 and the eyelet 23 of the base 12, and the base 12 is fitted into the cover 13 and fixed by caulking or bonding. Subsequently, by injecting a heat conductive member into the base 12 through the notch 56 of the holder 15 with the base 12 facing down and the arc tube 14 facing upward, at least the notch 56 side of the holder 15 A heat conductive member is filled between the electronic component 66 such as a transformer CT positioned opposite to the base 12 and the cover 13 side, or the whole inside of the base 12 is filled with the heat conductive member. Subsequently, the luminous bulb 14 is covered with a globe 16 and the globe 16 is fixed to the cover 13 with an adhesive.

  As shown in FIG. 10, for example, a lighting device 81 that is a downlight has a lighting fixture body 82, and a socket 83 and a reflector 84 are attached to the lighting fixture body 82. 11 is installed.

  Note that the number of bulbs 31, 32, 33 of the arc tube 14 is not limited to three, but two or four or more may be arranged in parallel to make the discharge path length longer.

  11 to 13 show a second embodiment. FIG. 11 is a side view of an arc tube of a bulb-type fluorescent lamp, FIG. 12 is a perspective view showing a holder of the bulb-type fluorescent lamp, and FIG. 13 is a perspective view showing another example of a holder of the bulb-type fluorescent lamp.

  As shown in FIG. 11, the arc tube 14 uses a bulb 91 having a discharge path length of 250 to 500 mm and a tube outer diameter of 3 to 8 mm, and a pair of electrode end portions where a pair of electrodes 36 are sealed. It is bent spirally so that 40 is located at one end side in the height direction. The pair of electrode end portions 40 protrudes in parallel with the height direction, and a pair of wires 37 and a thin tube 38 are provided so as to protrude from the tip. One narrow tube 38 extends long so as to be disposed inside the base 12, and a main amalgam 39 is enclosed at the tip thereof.

  As shown in FIG. 12, the holder 15 has an arcuate recess 45 fitted into the peripheral surface of the protrusion 44 on each end side of the bulb 91 and the inner peripheral surface facing the center side of the arc tube 14. Formed in each of these recesses

A hole 46 communicating with the inside of the holder 15 is formed in the part 45. Although not shown,

The holder 15 also includes a wall portion 47, a contact portion 50, a positioning portion 51, an insertion hole 52, and the like.

  As shown in FIG. 13, when the arc tube 14 is spirally bent to the pair of electrode side end portions 40, the spiral electrode ends are arranged on the peripheral surface of the projection 44 of the holder 15. A concave portion 45 and a hole portion 46 are formed with which the inner peripheral side of the portion 40 engages.

  Then, after the arc tube 14 is combined with the holder 15, the first adhesive material 57 a is injected from the inside of the holder 15 through each hole 46, and faces the central portion of the arc tube 14 on the end side of the bulb 91. The inner peripheral portion of the peripheral surface is bonded and fixed to the holder 15. Subsequently, the second adhesive material 57b can be formed on the outer peripheral surface portion to further increase the fixing strength.

    In each of the above embodiments, the globe 16 may be omitted and the arc tube 14 may be exposed.

  Further, in each of the above embodiments, the cover 13 is omitted, the lighting device 17 is accommodated in the base 12, and the edge 61 of the opening 60 of the globe 16 is fitted and bonded to the inside of the shell 21 of the base 12. You may fix using materials etc.

  Further, the positioning portion of the holder 15 is not limited to the positioning portion 51, and a plurality of protrusions may protrude around the contact portion 50.

  Further, although it is preferable to provide the wall 47 inside the protrusion 44 of the holder 15, the adhesive 57 can be injected from the hole 46 of the protrusion 44 without providing the wall 47, and the protrusion 44 The wall portion 47 may not be formed if it is devised so that the adhesive 57 does not go around the inner center portion of the inner wall.

It is sectional drawing seen from the juxtaposition direction of the bulb | bulb in the lightbulb-type fluorescent lamp which shows the 1st Embodiment of this invention. It is sectional drawing seen from the direction which cross | intersects with the parallel arrangement direction of the bulb | bulb in a bulb-type fluorescent lamp same as the above. It is a perspective view of the holder of a bulb-type fluorescent lamp. It is a perspective view inside a holder combined with the arc tube of the bulb-type fluorescent lamp. It is the bottom view seen from the one end side of a holder by removing the cover and globe of the same bulb-type fluorescent lamp. It is the bottom view seen from the one end side of a holder by removing the cover, globe, and lighting device of the same bulb-type fluorescent lamp. It is the top view seen from the other end side of the holder of a bulb-type fluorescent lamp same as the above. It is sectional drawing seen from the other end side of the holder which adhere | attached and fixed the arc tube of the bulb-type fluorescent lamp same as the above. It is the top view which looked at FIG. 8 from the one end side of a holder. It is the schematic of the illuminating device using a bulb-type fluorescent lamp same as the above. It is a side view of the arc tube of the bulb-type fluorescent lamp showing the second embodiment of the present invention. It is a perspective view which shows the holder of a bulb-type fluorescent lamp same as the above. It is a perspective view which shows the other example of the holder of a bulb-type fluorescent lamp same as the above.

Explanation of symbols

11 Bulb-type fluorescent lamp
12 base
14 arc tube
15 Holder
17 Lighting device
31a, 32a, 33a Valve end
45 Recessed part for valve mounting
57a First adhesive
57b Second adhesive
81 Lighting equipment
82 Luminaire body
83 socket

Claims (4)

A bent arc tube formed such that a pair of electrode ends each having an electrode are positioned on one end side;
A holder for supporting at least one pair of electrode ends of the arc tube to support the arc tube;
A first adhesive having a relatively high heat resistance provided to bond the outer peripheral surface of the electrode end on the side where the electrode ends of the arc tube face each other and the holder;
A second adhesive having a relatively high hardness provided so that the end face of each electrode end of the arc tube and the holder are bonded;
A base provided on one end of the holder;
A lighting device housed between the holder and the base and lighting the arc tube;
A bulb-type fluorescent lamp characterized by comprising:   The holder has a protrusion integrally formed toward the other end side of the arc tube so as to be inserted between the inner ends of the electrode ends, and the protrusion and the outer periphery of the electrode end of the arc tube The bulb-type fluorescent lamp according to claim 1, wherein a surface is bonded to the first adhesive.   The first adhesive material is a silicone resin, and the second adhesive material is a cement material having at least a phenol resin as a main component and a hardness of 50 or more. The described bulb-type fluorescent lamp. A lighting fixture body;
A socket attached to the luminaire body;
The bulb-type fluorescent lamp according to any one of claims 1 to 3 mounted in a socket;
An illumination device comprising:

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