JP2011029057A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provided a luminaire capable of suppressing the temperature rise of the base of a fluorescent lamp having a spirally whirled tubular discharge path. <P>SOLUTION: Lamp supporting springs 18 for holding the fluorescent lamp 20 hold a pair of bases 23 each provided at both ends of an arc tube 22 in which the tubular discharge path is spirally whirled. Thereby, heat of the bases 23 heated by a filament 25 is released to a luminaire body 12 through the lamp supporting springs 18, and the temperature rise of the bases 23 is suppressed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a luminaire having a fluorescent lamp in which a tubular discharge path is swirled in a spiral shape.

2. Description of the Related Art Conventionally, a fluorescent lamp that is used in a lighting fixture and has a discharge path swirled in a double spiral shape is known (see, for example, Patent Document 1).
As shown in FIGS. 16A to 16C, in the fluorescent lamp 100 described in Patent Document 1, the tubular discharge path is swirled in a double spiral along substantially the same plane with the longitudinal center portion 101a as the center. The arc tube 101 is provided, and on the back surface (opposite side to the light emitting surface), a bridge 102 is provided to connect both end portions 101b and 101b of the arc tube 101 through the central portion 101a.

  A base 103 is provided at the center of the bridge 102 so as to protrude from the back side, and a lamp pin 104 is provided at the center of the base 103. Further, a plurality of arc tube holding members 102 a and 102 a are provided through the fluorescent lamp 100 from the bridge 102, and hold an intermediate portion of the arc tube 101. Further, a pair of holding handles 103a and 103a are provided so as to protrude from the base 103 to the back side.

  In addition, tungsten filament coil electrodes 105 and 105 are sealed as electrodes inside both ends 101b and 101b of the arc tube 101, and are spanned between electrode lead wires (not shown). The electrode lead wire extends to the base 103 along the bridge 102 and is connected to the lamp pin 104. At both ends 101b and 101b of the arc tube 101, arc tube holding portions 106 and 106 are provided.

JP 2007-273336 A (FIG. 2)

 However, the lighting fixture described in Patent Document 1 described above has a problem that when the fluorescent lamp 100 is turned on, the arc tube end portion 101b on which the filament is provided becomes high temperature, so that the base 103 becomes high temperature.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a luminaire that can suppress the temperature rise of the base of a fluorescent lamp in which a tubular discharge path is swirled in a spiral shape. .

  The luminaire of the present invention includes a fluorescent lamp comprising a luminous tube in which a tubular discharge path is swirled, a pair of caps provided at both ends of the luminous tube, and a lamp pin provided in the cap. A lamp socket that is electrically connected to the lamp pin to supply power to the fluorescent lamp, a lamp support spring that holds the fluorescent lamp, and holds the fluorescent lamp through the lamp socket and the lamp support spring. In the lighting fixture including the fixture main body, the lamp support spring is made of metal and has a configuration for holding the base.

  With this configuration, the lamp support spring made of metal with good heat conductivity that holds the fluorescent lamp holds the base, so that the heat of the base heated by the filament can be released to the instrument body through the lamp support spring. Temperature rise can be suppressed.

  The lighting fixture of the present invention includes a panel attached to the fixture main body so as to cover the front surface of the fluorescent lamp, and the lamp support spring covers the panel side of the portion corresponding to the filament at the end of the arc tube. is doing.

  With this configuration, since the lamp support spring is interposed between the filament and the panel, it is possible to make it difficult for the heat of the filament to be transmitted to the panel. Accordingly, the distance between the fluorescent lamp and the panel can be reduced, and the lighting fixture can be reduced in thickness.

  Further, the lighting fixture of the present invention has a configuration in which the lamp support spring is in contact with the base on the side opposite to the panel side and does not cover a portion corresponding to the filament at the end of the arc tube. .

  With this configuration, since the metal lamp support spring contacts the base, the heat of the base can be released to the instrument body to suppress the temperature rise, and the part corresponding to the filament is not covered on the opposite side of the panel. The fluorescent lamp can be easily attached to and detached from the lamp support spring.

  In the lighting fixture of the present invention, the lamp support spring includes a base holding portion that holds the base from a side surface, and a shielding portion that covers the panel side of a portion corresponding to the filament at the arc tube end. And the said shielding part has the structure which protrudes on the same curved surface along the said filament side from the said base holding | maintenance part.

  With this configuration, since the base holding portion of the metal lamp support spring comes into contact with the base, the heat of the base can be relieved to the instrument main body and the temperature rise can be suppressed. Moreover, since the shielding part of the lamp support spring covers the panel side of the part corresponding to the filament at the arc tube end, the heat of the filament can be made difficult to be transmitted to the panel. Further, since the portion corresponding to the filament is not covered on the side opposite to the panel, the fluorescent lamp can be easily attached to the lamp support spring.

  Moreover, the lighting fixture of this invention has the structure which provided the flame-resistant thin layer which has elasticity in the surface which the said lamp support spring contact | connects the said nozzle | cap | die.

  With this configuration, an elastic flame-retardant (for example, silicon) thin layer (for example, 0.5 mm to 1.0 mm) is provided on the surface of the lamp support spring that contacts the arc tube. It can be in close contact with the arc tube, and the heat of the arc tube can be efficiently transferred to the lamp support spring and further transferred to the fixture body for heat dissipation.

  Furthermore, in the lighting fixture of the present invention, the lamp pin is provided on the base so as to protrude along the axial direction of the arc tube, and the lamp pin comes from the lamp socket by abutting against the outer peripheral surface of the base and the lamp support spring. It has the structure which provided the turning movement prevention means which blocks | prevents that a fluorescent lamp moves to the direction to leave | separate.

  With this configuration, the turning movement preventing means abuts on the outer peripheral surface of the base and the lamp support spring, thereby preventing the fluorescent lamp from turning in a direction away from the lamp socket, so that the lamp pin is exposed from the lamp socket. , Can prevent falling out.

  In the present invention, since the metal lamp support spring having good heat conduction for holding the fluorescent lamp holds the base, the heat of the base heated by the filament can be released to the instrument body through the lamp support spring, and the base The lighting fixture which has the effect that a temperature rise can be suppressed can be provided.

The disassembled perspective view which shows the lighting fixture of 1st Embodiment which concerns on this invention. (A) is a plan view of a flat spiral fluorescent lamp, (B) is a front view as seen from the B direction in (A). Perspective view of lamp socket (A) is a front view of a lamp support spring, (B) is a plan view, and (C) is a side view. (A) is a perspective view showing the mounting position of the lamp support spring, (B) is a perspective view showing a state in which the flat spiral fluorescent lamp is held by the lamp support spring. (A) is a front view showing a state in which a flat spiral fluorescent lamp is mounted on a reflector, (B) is a side view, and (C) is a plan view. (A) is a perspective view which shows the attachment position of a lamp support spring in the lighting fixture concerning 2nd Embodiment, (B) is a perspective view which shows the state which hold | maintained the flat spiral fluorescent lamp with the lamp support spring. (A) is a front view of a lamp support spring, (B) is a plan view, and (C) is a side view. (A) is a front view showing a state in which a flat spiral fluorescent lamp is mounted on a reflector, (B) is a side view, and (C) is a plan view. (A) is a perspective view showing the mounting position of the lamp support spring, (B) is a perspective view showing a state in which the flat spiral fluorescent lamp is held by the lamp support spring. (A) is a front view of a lamp support spring, (B) is a side view. (A) is a perspective view showing a state before a flat spiral fluorescent lamp is mounted, and (B) is a perspective view showing a state where the flat spiral fluorescent lamp is held by a lamp support spring. (A) is a front view showing a state in which a flat spiral fluorescent lamp is mounted on a reflector, (B) is a side view, and (C) is a plan view. (A) is the perspective view which looked at the state which attached the flat spiral fluorescent lamp from the diagonal, (B) is the side view seen from the front of a lamp support spring (A) is a front view showing a state in which a flat spiral fluorescent lamp is mounted on a reflector, (B) is a side view, and (C) is a plan view. (A) is a perspective view of a flat spiral fluorescent lamp used in a conventional lighting fixture as seen from the irradiation direction, (B) is a perspective view of the flat spiral fluorescent lamp as seen from the opposite side to the irradiation direction, (C ) Is a front view seen from the irradiation direction.

(First embodiment)
Hereinafter, the lighting fixture of 1st Embodiment of this invention is demonstrated using drawing.
As shown in FIG. 1, a lighting fixture 10 according to a first embodiment of the present invention is used by being fixed to a wall surface 11 such as a ceiling or a wall. For example, a rectangular box-shaped fixture body 12 and a fixture body. 12 has a panel 13 made of a transparent or translucent resin or the like covering the front opening of 12. An electrical component such as a lighting device 14 connected to a commercial AC power supply (not shown) is attached to the bottom plate 12a of the appliance main body 12 near one end, and covers the lighting device 14 and the panel 13. A mounting plate 15 for mounting is provided. The panel 13 is detachably attached by screwing the screw 13a into the screw hole 15a of the attachment plate 15 and tightening.

  Further, a reflector 16 is provided from the center and the other end of the bottom plate 12a to reflect the illumination light of the flat spiral fluorescent lamp 20 as a fluorescent lamp toward the panel 13 and improve the illumination efficiency. A pair of lamp sockets 17 and 17 for mounting the flat spiral fluorescent lamp 20 are attached to the upper surface of the reflector 16. These lamp sockets 17 and 17 are connected to the lighting device 14 by power lines (not shown). When the flat spiral fluorescent lamp 20 is mounted on the lamp socket 17 on the upper surface of the reflecting plate 16, which is the surface facing the flat spiral fluorescent lamp 20 in the instrument body 12, the base of the flat spiral fluorescent lamp 20 is mounted. A lamp support spring 18 is provided to hold 23.

  As shown in FIG. 2, the flat spiral fluorescent lamp 20 has an arc tube 22 in which a tubular discharge path is swirled in a double spiral shape along the same plane starting from the longitudinal central portion 22a. The central portion 22a of the arc tube 22 has a larger diameter than the other portions and is the coldest point. Bases 23 and 23 are respectively attached to both ends of the arc tube 22, and both the caps 23 and 23 are provided at point-symmetrical positions with respect to the central portion 22 a of the arc tube 22. Both the caps 23 and 23 are connected by a bridge 24 provided on the back surface opposite to the irradiation direction. Each of the caps 23, 23 is provided with a pair of lamp pins 21 protruding in the direction perpendicular to the plane of the flat spiral fluorescent lamp 20 with one end projecting along the axial direction of the arc tube 22, and the other end emitting light. It is connected to a filament 25 (see FIG. 5A) provided at the inner end of the tube 22.

  As shown in FIG. 3, the lamp socket 17 has, for example, a cylindrical main body 17a, and the main body 17a is provided with a lamp pin insertion groove 17b for inserting the lamp pin 21. A pair of conductive plates 17c and 17c are provided inside the lamp pin insertion groove 17b to hold and connect the pair of lamp pins 21 and 21. Further, an opening / closing lid 17d for closing the lamp pin insertion groove 17b is provided along the outer peripheral surface of the main body 17a by moving the handle 17e.

  As shown in FIGS. 4A to 4C, the lamp support spring 18 is made of metal such as SK material or SUS, which has good heat conductivity and good heat dissipation, and holds the base 23 from the side. The base holding part 18 a has a curved surface along the side surface of the base 23. An upper end portion of the base holding portion 18 a is provided with a folded portion 18 b that is folded outward, so that the flat spiral fluorescent lamp 20 can be easily attached to the lamp support spring 18.

  The base holding part 18a is provided integrally with the support part 18c and the base part 18d, and the base part 18d is attached to the reflecting plate 16 by screws, for example. Before the flat spiral fluorescent lamp 20 is mounted, the lamp support spring 18 is attached to the flat spiral fluorescent lamp 20 so as to be offset from the position of the flat spiral fluorescent lamp 20 in the direction of arrow A in FIG. Is attached in the direction of the arrow A and is securely held.

  When attaching the flat spiral fluorescent lamp 20 to the instrument body 12, as shown in FIG. 5A, lamp pins 21, 21 provided on the caps 23, 23 at both ends of the flat spiral fluorescent lamp 20, The lamp socket 17 is positioned in the lamp pin insertion groove 17b. Then, the lamp pin 21 is inserted into the lamp socket 17, and the base 23 is held by the base holding part 18a of the lamp support spring 18 (see FIG. 5B). Thereafter, the handle 17e of the lamp socket 17 is operated and the open / close lid 17d is closed to fix the lamp socket 17 (see FIGS. 6A to 6C).

  As described above, according to the luminaire 10 according to the first embodiment described above, the lamp support spring 18 made of metal having good thermal conductivity and holding the flat spiral fluorescent lamp 20 holds the base 23, so that the filament 25 The heat of the heated base 23 can be released to the instrument body 12 through the lamp support spring 18, and the temperature rise of the base 23 can be suppressed.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment of this invention is demonstrated using drawing. In addition, suppose that the same code | symbol is attached | subjected to the site | part common to the lighting fixture of 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 7-9, in the lighting fixture 10B concerning 2nd Embodiment of this invention, the nozzle | cap | die holding | maintenance part 18a of the lamp | ramp support spring 18 in the lighting fixture 10 which concerns on 1st Embodiment mentioned above is the panel 13 side ( 7 is extended along the arc tube 22 so as to cover the panel 13 side of the portion 22b (see FIG. 7A) corresponding to the filament 25 at the end of the arc tube 22. A support spring 182 was formed. The base portion 18d, the support portion 18c, and the folded portion 18b are the same as those in the first embodiment described above.

  The lamp support spring 182 is provided with a base holding part 18a for holding the base 23 from the side surface and a shielding part 18e for covering the panel 13 side of the part 22b corresponding to the filament. That is, as shown in FIG. 8C, the base holding part 18a is extended along the filament 25 side to provide a shielding part 18e. Therefore, the shielding part 18e covers the outer side (that is, the side opposite to the center of the flat spiral fluorescent lamp 20) and the upper part (that is, the panel 13 side) of the portion 22b corresponding to the filament 25, but does not cover the inner side and the lower side. Moreover, the shielding part 18e protrudes on the same curved surface as the base holding part 18a. For this reason, the shield 18 e does not contact the arc tube 22 at the end of the arc tube 22 whose outer diameter is smaller than the outer diameter of the base 23.

  Further, the lamp support spring 182 is in contact with the base 23 on the side opposite to the panel 13 side (lower side in FIG. 7) so as not to cover the portion 22 b corresponding to the filament at the end of the arc tube 22. That is, as shown in FIG. 8C, the shielding part 18e is provided from the upper surface to the side surface of the base 23, and is not provided from the side surface to the lower surface.

  As described above, according to the lighting apparatus 10B according to the second embodiment described above, the shielding portion 18e of the lamp support spring 182 is interposed between the filament 25 and the panel 13, and therefore the heat of the filament 25 is applied to the panel 13. Can be difficult to communicate. Accordingly, the lighting fixture 10B can be thinned by reducing the distance between the fluorescent lamp lamp 20 and the panel 13.

  Further, since the base holding portion 18a of the lamp support spring 182 contacts the base 23, the heat of the base 23 can be released to the instrument body 12 to suppress the temperature rise, and on the side opposite to the panel 13, the shielding portion 18e. Does not cover the portion 22b corresponding to the filament, the fluorescent lamp 20 can be easily attached to and detached from the lamp support spring 182.

  In addition, since the range covered with the shielding part 18b is limited to the part 22b corresponding to the filament 25, the appearance is not impaired.

(Third embodiment)
Next, the lighting fixture of 3rd Embodiment of this invention is demonstrated using drawing. In addition, suppose that the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture of 1st Embodiment and 2nd Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 10, in the luminaire 10 </ b> C according to the third embodiment of the present invention, the flame retardant having elasticity on the surface of the lamp support spring 18 in the luminaire 10 according to the first embodiment that is in contact with the base 23. The thin lamp layer 19 is provided to form the lamp support spring 183. The base portion 18d, the support portion 18c, and the folded portion 18b are the same as those in the first embodiment described above.

  As shown in FIGS. 11A and 11B, the lamp support spring 183 is provided at a location in contact with the arc tube 22, that is, at the base holding portion 18a, at least on the surface on the arc tube 22 side (in FIG. 10B). A thin layer 19 (for example, 0.5 mm to 1.0 mm thick) formed of a flame-retardant material having elasticity, such as silicon, is provided on the right surface).

  As described above, according to the luminaire 10C according to the third embodiment described above, since the flame-retardant thin layer 19 having elasticity is provided on the surface of the lamp support spring 183 in contact with the arc tube 22, the light emission of the fluorescent lamp 20 is achieved. It can be in close contact with the tube 22, and the heat of the arc tube 22 can be efficiently transferred to the lamp support spring 183 and further transferred to the fixture body 12 to be radiated.

(Fourth embodiment)
Next, the lighting fixture of 4th Embodiment of this invention is demonstrated using drawing. In addition, suppose that the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture of 1st Embodiment mentioned above-3rd Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 12 and 13, in the lighting fixture 10D according to the fourth embodiment of the present invention, in the lighting fixture 10 according to the first embodiment described above, the outer peripheral surface 23a of the base 23 and the lamp support spring 18 are A swivel movement blocking means 26 is provided for blocking the fluorescent lamp 20 from moving in a direction in which the lamp pin 21 moves away from the lamp socket 17 by coming into contact with each other.

  That is, as shown in FIG. 12, a concave portion 23b is provided on the outer peripheral surface 23a of the base 23 as the rotational movement preventing means 26, and the lamp support spring 18 is fitted into the concave portion 23b of the base 23 to thereby turn the arc tube 22 in the rotational direction. To prevent movement. The width of the recess 23 b provided in the base 23 needs to be large enough to fit the base holding part 18 a of the lamp support spring 18. Further, as shown in FIG. 12A, the recesses 23b can be formed by providing protrusions at both ends in the width direction along the circumferential direction of the base 23, but the recesses can be formed by reducing the thickness of the base 23. May be formed. The recess 23b is sufficient if provided on the outer peripheral surface 23a outside the base 23 (opposite the center of the fluorescent lamp 20), but may be provided on the entire periphery.

  Accordingly, when the flat spiral fluorescent lamp 20 is attached to the instrument body 12, as shown in FIG. 12A, the lamp pins 21, 21 provided on the caps 23, 23 at both ends of the flat spiral fluorescent lamp 20 are provided. Is positioned in the lamp pin insertion groove 17 b of the lamp socket 17. Then, the flat spiral fluorescent lamp 20 is lowered (that is, moved in a direction approaching the reflecting plate 16) while opening the cap holding portion 18a of the lamp support spring 18 to the outside, and the lamp pin 21 is inserted into the lamp socket 17. At the same time, the lamp support spring 18 is fitted along the recess 23 b of the base 23. Thereby, the base 23 is held. Thereafter, the handle 17e of the lamp socket 17 is operated and the open / close lid 17d is closed to fix it.

As described above, according to the luminaire 10D according to the fourth embodiment described above, the lamp support spring 18 is fitted into the recess 23b provided on the outer peripheral surface 23a of the base 23, so that the lamp pin 21 moves away from the lamp socket 17. It is possible to prevent the fluorescent lamp 20 from turning and to prevent the lamp pin 21 from being exposed and dropped from the lamp socket 17.
Further, when the fluorescent lamp 20 is mounted, the lamp support spring 18 is fitted into the recess 23 b of the base 23, and the fluorescent lamp 20 is lowered along the lamp support spring 18, thereby easily positioning the fluorescent lamp 20. Therefore, the fluorescent lamp 20 can be easily mounted.

(Fifth embodiment)
Next, the lighting fixture of 5th Embodiment of this invention is demonstrated using drawing. In addition, suppose that the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture of 1st Embodiment-4th Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 14 and 15, in the lighting fixture 10E according to the fifth embodiment of the present invention, in the lighting fixture 10 according to the first embodiment described above, the outer peripheral surface 23a of the base 23 and the lamp support spring 18 are Rotation movement blocking means 26 is provided for blocking the fluorescent lamp from moving in a direction in which the lamp pins are separated from the lamp socket by abutting each other.

  That is, the end face 18f of the lamp support spring 18 is brought into contact with the step 23c of the base 23 serving as the turning movement preventing means 26, thereby preventing the arc tube 22 from moving in the turning direction.

  Therefore, when the flat spiral fluorescent lamp 20 is attached to the fixture body 12, the lamp pins 21, 21 provided on the caps 23, 23 at both ends of the flat spiral fluorescent lamp 20 are replaced with the lamp pin insertion grooves 17 b of the lamp socket 17. Position to. Then, the flat spiral fluorescent lamp 20 is lowered (that is, moved in a direction approaching the reflecting plate 16) while opening the cap holding portion 18a of the lamp support spring 18 to the outside, and the lamp pin 21 is inserted into the lamp socket 17. . At this time, the step 23 c of the base 23 is brought into contact with the end face 18 f of the lamp support spring 18, and the fluorescent lamp 20 is lowered along the lamp support spring 18. Thereafter, the handle 17e of the lamp socket 17 is operated and the open / close lid 17d is closed to fix it.

As described above, according to the luminaire 10E according to the fifth embodiment described above, the lamp support spring 18 contacts the step 23c of the base 23, so that the fluorescent lamp 20 pivots in a direction away from the lamp socket 17. Therefore, it is possible to prevent the lamp pin 21 from being exposed and dropped from the lamp socket 17.
Further, when the fluorescent lamp 20 is mounted, the step 23 c of the base 23 is brought into contact with the end face 18 f of the lamp support spring 18, and the fluorescent lamp 20 is lowered along the lamp support spring 18 to facilitate the fluorescent lamp 20. Therefore, the fluorescent lamp 20 can be easily mounted.

In addition, the lighting fixture of this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, in the above-described embodiment, the base 23 and the bridge 24 are integrally formed, and the fluorescent lamp in which the step 23c is provided in the joint portion of the base 23 with the bridge 24 has been described. For example, a fluorescent lamp that does not have the step 23 c at the joint portion of the base 23 with the bridge 24 or a fluorescent lamp that does not have the bridge 24 may be used.

  Further, in each of the above-described embodiments, the description has been given using the fluorescent lamp 20 in which the tubular arc tube 22 is swirled in a double spiral shape along substantially the same plane with the longitudinal center portion 22a as the center. However, the present invention is not limited to this. For example, the arc tube 22 has a arc tube having a shape in which the arc tube 22 is swirled in a double spiral shape about the longitudinal central portion 22a, and the central portion gradually rises (swells). Alternatively, a fluorescent lamp having an arc tube swung in a single spiral shape may be used.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 12 Appliance main body 13 Panel 17 Lamp socket 18 Lamp support spring 18a Base holding | maintenance part 18e Shielding part 19 Thin layer 20 Fluorescent lamp 21 Lamp pin 22 Light emitting tube 22b Part corresponding to a filament 23 Base 23a Outer peripheral surface 23b Recessed means)
23c Step (turning movement prevention means)
25 Filament

Claims (6)

A fluorescent lamp comprising an arc tube in which a tubular discharge path is swirled, a pair of caps provided at both ends of the arc tube, and a lamp pin provided at the cap, and electrically connected to the lamp pin A lamp socket connected to supply power to the fluorescent lamp, a lamp support spring that holds the fluorescent lamp, and an appliance body that holds the fluorescent lamp via the lamp socket and the lamp support spring In the instrument,
The lamp support spring is made of metal and holds the base.   2. The illumination according to claim 1, further comprising a panel attached to the fixture body so as to cover a front surface of the fluorescent lamp, wherein the lamp support spring covers a panel side of a portion corresponding to the filament at the end of the arc tube. Instruments.   3. The lighting apparatus according to claim 2, wherein the lamp support spring is in contact with the base on the side opposite to the panel side and does not cover a portion corresponding to the filament at the end of the arc tube.   The lamp support spring includes a base holding portion that holds the base from a side surface, and a shielding portion that covers the panel side of a portion corresponding to the filament of the arc tube end portion, and the shielding portion holds the base. The luminaire according to claim 2, wherein the luminaire protrudes from the portion along the filament side along the same curved surface.   The lighting fixture according to any one of claims 1 to 4, wherein the lamp support spring is provided with a flame-retardant thin layer having elasticity on a surface in contact with the base.   The lamp pin is provided on the base so as to protrude along the axial direction of the arc tube, and the fluorescent lamp moves in a direction in which the lamp pin moves away from the lamp socket by contacting the outer peripheral surface of the base and the lamp support spring. A lighting fixture according to any one of claims 1 to 5, further comprising a turning movement blocking means for blocking the rotation.

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