WO2006033325A1

WO2006033325A1 - Circular fluorescent lamp and lighting appratus

Info

Publication number: WO2006033325A1
Application number: PCT/JP2005/017289
Authority: WO
Inventors: Masahiro Izumi; Masahiko Yoshida
Original assignee: Toshiba Lighting & Technology Corporation
Priority date: 2004-09-24
Filing date: 2005-09-20
Publication date: 2006-03-30
Also published as: KR100862410B1; CN100594570C; JP4788601B2; KR20070046177A; CN101027743A; TWI288425B; TW200611297A; JPWO2006033325A1

Abstract

A circular fluorescent lamp comprising: a circular bulb (2) that includes a pair of filament electrodes (9,10) respectively sealed at the opposite ends (2a,2b), a fluorescent substance layer formed on the inner surface, and a discharge medium sealed inside, and is formed to be circular so that the opposite ends face each other; and a base that includes outer leads (7a,7b,8a,8b) respectively extending to the outside from the opposite ends of the bulb, a hollow, cylindrical base body (5) rotatably provided along the outer surface of the bulb to extend between the opposite ends of the bulb, base pins (5c,5c,---) disposed on the outer surface of the bulb body and connected with the outer leads, and lead wire regulating units (14a,14b,15a,15b) provided in the base body so as to route the outer leads to be mutually separated in a base-diameter direction and regulating the rotation angle of the base body. According to the above arrangement, a circular fluorescent lamp and a lighting apparatus are provided that can regulate the rotation angle of the base to within specified range without forming, as a base rotation angle regulating means, a regulating member such as a protrusion on the bulb side.

Description

Annular fluorescent lamp and lighting fixture

Technical field

[0001] The present invention relates to an annular fluorescent lamp having a base that rotates at a predetermined angle with respect to an annular bulb, and a lighting fixture including the annular fluorescent lamp.

Background art

Conventionally, as an example of this type of annular fluorescent lamp, there is one described in Japanese Patent Application Laid-Open No. 11-162329. In the annular fluorescent lamp described therein, an annular concave portion (constricted portion) is formed at one of both end portions of an annular glass bulb to which a base is fitted, and a necessary interval is provided in the circumferential direction within the annular concave portion. A plurality of restricting members are fixed to each other, and a protruding portion protruding between the restricting members is provided on the inner surface of the base.

[0003] Therefore, the force that can turn the base with respect to the valve can be restricted by an angle that allows the protrusion of the base to be displaced between the restricting members on both sides thereof.

[0004] However, in such a conventional annular fluorescent lamp, a restricting member is fixed in at least one annular recess at both ends of the annular bulb, and a protrusion protruding into the gap between the restricting members And the structure is not always simple, and there is a problem that the rotation restriction angle of the base is likely to vary due to the positioning accuracy of these restricting members and protrusions. .

[0005] In general, when the shape of the annular valve is an annular shape, the base is curved in the same manner as the curvature of the annular valve. For this reason, when only the base is rotated about the axis, the bending directions of the base and the annular valve are shifted from each other, and when the predetermined rotational angle is reached, the inner surface of the base and the outer surface of the end of the annular valve are engaged. Therefore, the rotation angle of the base can be regulated relatively easily.

[0006] When both ends of the annular valve having the annular shape and the base fitted thereon are arranged substantially linearly opposite to each other, they are straddled between both ends of the valve. The base is also almost linear. For this reason, when the base is not connected to the valve via the lead wire, the rotation of the base is structurally almost infinite. A stage is needed.

[0007] Disclosure of the Invention

The present invention has been made in consideration of such circumstances, and its purpose is to set the rotation angle of the base within a predetermined range without forming a regulating member such as a protrusion on the valve side as a rotation angle regulating means. An object of the present invention is to provide an annular fluorescent lamp and a luminaire that can be regulated.

[0008] An annular fluorescent lamp of the present invention provided to achieve the above object is

A pair of filament electrodes sealed at both ends, and a phosphor layer formed on the inner surface

A ring-shaped bulb having a discharge medium enclosed therein, and formed in a ring shape so that the both ends face each other,

A pair of lead wires respectively connected to the ends of the pair of filament electrodes and extending to both ends of the bulb;

A hollow cylindrical base body rotatably disposed along the outer surface of the valve across both end portions of the valve; a base pin disposed on the outer surface side of the base body and connected to the lead wire; A base provided with a lead wire regulating member that is disposed in the base body so as to be routed away from each other in the radial direction of the base body and regulates the rotation angle of the base body within a predetermined range;

It is characterized by comprising.

[0009] The above lead wire is connected to each end portion of the filament electrode, and is wired in the base with a slight margin.

[0010] Further, according to a preferred embodiment of the present invention, in the lead wire regulating member, the rotation angle of the base body is in the range of 90 ° to 270 °, preferably in the range of 90 ° to 120 °. You may make it regulate to.

[0011] Further, it is preferable that the lead wire regulating member is a columnar rib disposed so as to protrude inwardly of the inner surface force of the base body. In this case, the base body includes a semi-cylindrical first base body provided with the base pins and columnar ribs, and a semi-cylindrical second base body coupled to the first base body, The inner surface of the second base body may be provided with a displacement restricting member that contacts the columnar rib and restricts the displacement of the lead wire toward the second base body. [0012] Preferably, the lead wire regulating member separates the pair of lead wires from each other beyond the interval between the pair of base pins to which the pair of lead wires extending from each filament is connected.

[0013] Further, the object is to provide an annular fluorescent lamp having the above structure, a lighting fixture main body to which the annular fluorescent lamp is attached, and a lighting circuit for supplying power to the annular fluorescent lamp. This is achieved by providing

[0014] According to the ring-shaped fluorescent lamp of the present invention having the above-described features and the lighting fixture including the same, when the base is rotated, the lead wire is pulled in the axial direction, and the tension limit thereof is set to the limit. Since it is regulated by the wire regulation member, further rotation of the base is regulated. In other words, the rotation angle of the die is regulated by the lead wire tension limit.

[0015] Further, since the lead wire regulating member routes the lead wires so as to bypass the outside of the cap pins arranged close to each other, it is possible to prevent the adjacent lead wires from coming into contact with each other and causing a short circuit. Can be prevented.

[0016] Further, according to the preferred embodiment described above, the entire base is rotated within a range of 90 ° to 270 °, preferably within a range of 90 ° to 120 °. The ease of attachment / detachment to / from can be improved. In addition, since the lead wire regulating member is a columnar rib of the die, the configuration of the lead wire regulating member is simple and can be easily formed integrally with the whole die by a die of the whole die.

[0017] Further, even if the pair of lead wires are removed from the lead wire restricting portion, it is possible to prevent the pair of lead wires from being displaced toward the second base body and coming close to or in contact with each other. For this reason, it is possible to reliably prevent the rotation of the base and the short-circuit between the pair of lead wires.

Brief Description of Drawings

FIG. 1 is a plan view of an essential part of an annular fluorescent lamp according to an embodiment of the present invention.

[FIG. 2] FIG. 2 is a plan view of the main part for explaining the action of the rotation angle of the ring-shaped fluorescent lamp shown in FIG. 1 when its base is rotated.

FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 after the first base body shown in FIG. 1 is joined to the second base body and assembled into the base. 4 is a partially open plan view showing the overall configuration of a ring-shaped fluorescent lamp including a base including the first base body shown in FIG.

FIG. 5 is a plan view of the inner surface side of the first base body shown in FIG.

FIG. 6 is a plan view of the outer surface side of the first base body shown in FIG.

FIG. 7 is a front view of the first base body shown in FIG.

FIG. 8 is a right side view of FIG.

FIG. 9 is a plan view of the inner surface side of the second base body according to the embodiment of the present invention.

FIG. 10 is a right side view of the second base body.

FIG. 11 is a plan view of a luminaire according to a second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding parts are denoted by the same reference numerals.

FIG. 1 is an enlarged cross-sectional view showing a base portion of a ring-shaped fluorescent lamp according to an embodiment of the present invention, a state before the base is rotated, and FIG. 2 shows a state in which the rotation is restricted. ing. 3 to 10 are drawings showing the overall structure of the annular fluorescent lamp and the structure of the base body.

[0021] Fig. 4 shows a ring-shaped fluorescent lamp formed in the same plane and in a square shape. This ring-shaped fluorescent lamp 1 has both end portions 2a and 2b of a glass bulb 2 arranged opposite to each other at a required interval. A hollow cylindrical base 3 is mounted on the outer surfaces of the both end portions 2a and 2b so as to straddle between the both end portions 2a and 2b. The base 3 is rotatably fitted along the outer surface of the valve 2 so that the tube shafts of the both end portions 2a and 2b of the nozzle are substantially pivoted.

[0022] The noble 2 is formed in a substantially square shape on one plane, for example, by bending a single straight tubular glass bulb, and includes a plurality of straight pipe portions 2c, 2c,. And 2d, 2d,.

[0023] The pipe outer diameter of each straight pipe portion 2c is, for example, in a range of 12 to 20 mm, and the optimum range of the pipe outer diameter in consideration of lamp characteristics such as lamp efficiency and manufacturing conditions is 14 to 20 mm. 18mm. The straight pipe portion 2c in the vicinity of the bent portion 2d is considered to be slightly out of the above-mentioned range force due to a slight change in the outer diameter of the pipe during bending of the bent portion. It is sufficient that most of c is within the above range. The wall thickness of the straight pipe portion 2c should be about 0.8 to 1.2 mm.

[0024] The bulb 2 may be made of a semi-hard glass such as a force borosilicate glass formed of a soft glass such as soda lime glass. The wall thickness of the valve is preferably about 0.8 to 1.2 mm, but is not limited to this.

[0025] The phosphor layer (film) 4 applied to the inner surface of the bulb 2 is formed on the entire straight tubular glass bulb 2 before the formation of the bent portion 2d.

The phosphor constituting the phosphor layer 4 can be a known phosphor such as a three-wavelength phosphor or a halophosphate phosphor. From the viewpoint of luminous efficiency, the three-wavelength phosphor Is preferred.

[0027] Three-wavelength phosphors include BaMg Al 2 O 3: Eu ²⁺ as a blue phosphor having an emission peak wavelength near 450 nm, and a green fluorescence having an emission peak wavelength near 540 nm.

2 16 27

(La, Ce, Tb) PO, a red phosphor having an emission peak wavelength near 6 lOnm

Four

YO: Forces that Eu ^{3+ and the} like are applicable to

twenty three

Note that a protective film (not shown) may be interposed between the inner surface of the bulb 2 and the phosphor layer 4. As the protective film, those composed of metal oxide fine particles are suitable, and fine particles such as alumina (Al 2 O 3) and strontium phosphate (Sr 3 P 2 O 3) are used as the metal oxide fine particles.

2 3 2 2 7

It is possible.

[0029] The base 3 is formed of a synthetic resin such as PBT (polybutylene terephthalate), PET (polyethylene terephthalate), PC (polycarbonate) or the like into a substantially cylindrical shape, and has a semi-cylindrical shape as shown in FIGS. The first base body (P body) 5 and the semi-cylindrical second base body (M body) 6 shown in FIGS. 9 to 10 are joined to each other in the radial direction as shown in FIG. By doing so, it is formed into a cylindrical shape with axially open ends.

[0030] As shown in Figs. 6 and 7, the first base body 5 is formed with a square recess 5a in the substantially central portion of the outer surface thereof, and on the bottom 5b of the recess 5a, a hollow cylindrical 4 The base pins 5c, 5c,... Are arranged in a substantially square lattice and are erected vertically. Both inner and outer ends of each cap pin 5c are open.

[0031] As shown in FIG. 5, there is a cylinder at the center of the square grid array of these cap pins 5c, 5c ''' A rib 5d is protruded, and a through hole 5e through which a mounting screw is passed is formed in the rib 5d.

FIG. 5 illustrates the inner surface of the first base body 5, and each base pin 5 c has a lead insertion hole 5 ca opened on the bottom surface thereof. In each lead insertion hole 5ca, a pair of left and right lead leads 7 and 8 shown in FIG. 1 are inserted, respectively, and each base pin 5c, 5c,... Connected to 5c, 5c, etc. mechanically and electrically.

[0033] As shown in FIG. 1, each pair of counter leads 7, 8 has a pair of upper and lower 7a, 7b, 8a, 8b in the figure. In addition to the outer leads 7 and 8, the lead wires are a pair of inner leads 9a, 9b, 10a, and 10b that support the axial ends of the pair of electrodes 9 and 10 sealed in the valve ends 2a and 2b, respectively. The sealing wires 9c, 9d, 10c, and 10d are sealed to the glass stems 11 and 12, and the valve ends 2a and 2b are hermetically penetrated to extend to the outside as a whole. In FIG. 1, at least one of the pair of left and right stems 11 and 12 is provided with an exhaust pipe 13 made of a glass thin tube communicating with the inside of the nozzle 2. In the bulb 2, mercury and rare gas are enclosed as a discharge medium. However, as the discharge medium, mercury may be omitted and only a rare gas may be enclosed in the valve 2.

As shown in FIG. 1, the first base body 5 has a pair of upper and lower prismatic lead wire regulating ribs 14a in FIG. 1 on the pair of left and right sides of the inner surface of the bottom 5b of the recess 5a. 14b, 15a and 15b are integrally projected as lead wire regulating members.

As shown in FIG. 1 or FIG. 5, the lead wire regulating ribs 14a, 14b, 15a, 15b are arranged at positions that pass outside the radial direction of the square lattice arrangement of the cap pins 5c. That is, the lead wire regulating ribs 14a, 14b, 15a, 15b are arranged on the inner surface of the first base body 5 so as to be routed away from each other in the radial direction of the pair of outer leads 7, 8 force S base bodies 5, 6. It is arranged in. In FIGS. 1 and 5, reference numerals 16a and 16b denote a pair of upper and lower engaging projections of the first base body 5, and 17 stands substantially vertically inward from the inner surface of the first base body 5. This is a prismatic positioning rib for positioning the mounting position when the base 3 is attached to the valve 2 by contacting the substantially central portion of the outer end of the valve end 2b.

[0036] As shown in the plan view of the inner surface of FIG. 9, the second base body 6 is located approximately at the center of the inner bottom surface. A cylindrical columnar rib 18 having a screw hole 18a to be screwed into a mounting screw (not shown) is protruded, and a pair of upper and lower pairs formed with an engagement hole 19a on the upper side and the lower side of the columnar rib 18 in FIG. Columnar ribs 19 and 19 are projected. The ribs 19 and 19 are positioned by engaging a pair of upper and lower engagement protrusions 16a and 16b of the first base body M body 5 in the engagement holes 19a and 19b, respectively, and are not shown in this state. The mounting screw is coupled by screwing into the screw hole 18a through the through hole 5e to constitute the cylindrical base 3.

[0037] In addition, the second base body 6 includes a pair of upper and lower displacement regulating ribs 20a, 20b, 21a, 21b, as shown in the right side view of FIG. Projecting together.

[0038] As shown in Fig. 3, these displacement regulating ribs 20a, 20b, 21a, 21b are such that the free end surface on the open end side of the second base body 6 has the lead wire regulating ribs 14a, 14b, 15a, They are arranged at positions that contact the free end face of 15b. It should be noted that the free end of the opening side of the second base body 6 and the free end surfaces of the lead wire regulating ribs 14a, 14b, 15a, 15b are not necessarily in contact with each other. There may be. However, this gap needs to be a minute gap smaller than the diameter of the outer leads 7a, 7b, 8a, 8b. As a result, the outer leads 7a, 7b, 8a, 8b get over the lead wire regulating ribs 14a, 14b, 15a, 15b and are displaced to the second base body 6 side, and the pair of outer leads 7, 8, or 9, 10 are close to each other. It is possible to restrict movement in the direction of the movement.

[0039] An example of main dimensions of the base 3 configured as described above is as follows.

[0040] [First base body 5 (see Fig. 5)]

Total length: 50.0 ± 0.5mm

Outside diameter: 19.6 ± 0.5 mm

Length of bottom 5b of recess 5a: 20. 0 ± 0.3 mm

The distance between the pair of lead wire regulating ribs 14a and 14b and 15a and 15b facing each other in the diameter direction of the first base body 5: 9.0 ± 0.3 mm

Length of one side of the orthogonal cross-section of each lead wire regulating rib 14a, 14b, 15a, 15b: 2.0 ± 0.5 mm (However, if the lead wire regulating rib is cylindrical, convert it to the outer diameter)

Length direction from the center of each cap pin 5c to each lead wire regulating rib 14a, 14b, 15a, 15b Dimensions: 6.0 ± 0.3 mm [Second base body 6 (See Fig. 9)]

Total length: 50.0 ± 0.5mm

Outside diameter: 19.6 ± 0.5 mm

The distance between the pair of displacement regulating ribs 20a and 20b and 21a and 21b facing each other in the diameter direction of the first base body 5: 9.0 ± 0.3 mm

Thickness of each displacement regulating rib 20a, 20b, 21a, 21b (dimension in the length direction of the second base body 5): 2.0 ± 0.5mm

Next, the operation of the annular fluorescent lamp 1 will be described.

[0041] First, when attaching the cap 3 to the outer surfaces of both ends 2a, 2b of the valve 2, as shown in Fig. 1, the free tips of the outer leads 7a, 7b, 8a, 8b are connected to the lead wire regulating ribs 14a, After passing through 14b, 15a, and 15b in the radial direction outside, they are passed through the through holes 5ca of the cap pins 5c. Then, the first base body 5 of the base 3 is placed between the valve end portions 2a and 2b, and one valve end, for example, the outer surface of the tip of 2b is brought into contact with the positioning rib 17 for positioning. Next, ensure the length of the water leads 7a, 7b, 8a, 8b in the base 3 so that the inserted water leads 7a, 7b, 8a, 8b are slightly cramped as shown in FIG. Each base pin 5c is fixed and connected to each base pin 5c by caulking in the radial direction of the outer end portion of each base pin 5c.

[0042] After that, the opening end of the second base body 6 is covered on the opening end of the first base body 5, and the respective engaging projections 16a, 16b of the first base body 5 are the second end. It is engaged and positioned in each of the engagement holes 19a and 19b of the base body 6.

[0043] After that, a mounting screw (not shown) is threaded through the screw through hole 5d of the first base body 5 and screwed into the screw hole 18a of the columnar rib 18 of the second base body 6. The first base body 5 and the second base body 6 are firmly joined.

[0044] After mounting the base 3 to the valve 2 in this way, the base 3 is moved as shown in Fig. 2 (the drawing shows a state in which both end portions 2a and 2b of the valve are relatively rotated around its axis). When the valve ends 2a and 2b are rotated in one direction around the axial center of the valve ends 2a and 2b, for example, the middle of the upper water lead abuts on the upper surface of the upper wiring regulating ribs 14a and 15a in the drawing, Pulled in the axial direction.

[0045] For this reason, when the upper water leads 7a and 8a reach the tension limit and become tensioned, they turn counterclockwise. The tension to push back in the direction increases, and when it rotates to a predetermined rotation angle, the rotation angle of the base 3 reaches the limit, and further rotation is restricted.

[0046] When the base 3 is rotated in the opposite direction, the middle of the lower tales 7b, 8b in FIG. 2 becomes the lower lead wire regulating ribs 14b, 15b in the figure. Similarly, the rotation angle of the base 3 is less than 360 °, for example, 90 ° to 270 °, preferably 90 ° to 120.

It can be regulated in the range of °.

[0047] Further, according to the annular fluorescent lamp 1, since it is not necessary to form annular recesses (constricted portions) at both end portions 2a and 2b of the bulb as in the conventional example, the processing of the bulb 2 is easy and quick. Can be improved. In the present invention, an annular recess may be formed on at least one end of the annular valve 2 as necessary without hindering the adoption of the annular recess.

Furthermore, the rotation angle of the base 3 can be easily and reliably restricted by a simple configuration in which the lead wire regulating ribs 14a, 14b, 15a, and 15b are simply formed on the base 3.

[0049] Further, the rotation angle of the base 3 can be easily and quickly adjusted by simply adjusting the length of the outer leads 7a, 7b, 8a, 8b as appropriate.

Furthermore, since the positioning rib 17 for positioning the mounting position of the valve 2 is formed on the base 3, positioning when mounting the base 3 to the valve 2 can be performed easily and quickly.

[0051] Further, since each of the outer leads 7a, 7b, 8a, 8b is passed radially outward of the lead wire regulating ribs 14a, 14b, 15a, 15b, each of the outer leads 7a, 7b, 8a, 8b rotates the base 3 It is possible to prevent short-circuiting due to contact with each other over time.

[0052] However, the reliability of short-circuit prevention may be further improved by covering the outer leads 7a, 7b, 8a, 8b with an electric insulating tube (not shown).

[0053] Further, in the above embodiment, the force described in the case where the pair of left and right wiring restricting ribs 14a, 14b, 15a, 15b are provided, respectively. The present invention is not limited to this. One of the regulating ribs 14a, 14b, 15a, 15b may be omitted.

[0054] Further, in the above embodiment, the force leads 7a, 7b, 8a, 8b are described in the case where the water leads 7a, 7b, 8a, 8b are simply wired outside the wiring regulating ribs 14a, 14b, 15a, 15b. In the middle, the wire regulating ribs 14a, 14b, 15a, and 15b may be wound as many times as necessary. FIG. 11 is a plan view of a lighting fixture 31 according to the second embodiment of the present invention. The illuminating device 31 includes the annular fluorescent lamp 1 shown in FIG. 1 above, an instrument main body 32 on which the annular fluorescent lamp 1 is detachably attached, and the instrument main body 32. And a lighting circuit 33 for supplying electric power.

[0056] The fixture body 32 is mounted on the ceiling, for example, a reflector (not shown), a lamp socket that is electrically connected to the lighting circuit 33, and a lamp holder that attaches the annular fluorescent lamp 1 to the fixture body 32 in a detachable manner. It has equipment. The reflector is formed in, for example, a white quadrangular pyramid shape and is disposed concentrically inside the annular fluorescent lamp 1.

[0057] The lighting circuit 33 obtains electric power from a commercial power source, converts it into high-frequency electric power having a required frequency, and supplies it to the annular fluorescent lamp via a lamp socket.

[0058] According to this lighting fixture 31, the quadrangular pyramid-shaped white reflector of the fixture main body 32 is disposed substantially concentrically at the center of the square ring-shaped fluorescent lamp 1, so that it is arranged in the downward direction of the fixture. The light characteristics are quadrangular, and the illumination space such as a quadrangular room can be illuminated almost uniformly.

[0059] In addition, since the base 3 of the annular fluorescent lamp 1 can be rotated in the range of 90 ° to 120 ° around its central axis, it can be connected to the lamp socket provided in the fixture body 32 without being connected. Ease of use can be improved.

Claims

The scope of the claims

[1] A pair of filament electrodes respectively sealed at both ends, a phosphor layer formed on the inner surface, and a discharge medium sealed inside, and having a ring shape formed in a ring shape so that the both ends face each other With a valve;

A hollow cylindrical base body that is rotatably disposed along the outer surface of the nozzle across the both ends of the core, and a base that is disposed on the outer surface side of the base body and is connected to the lead wire. A pin having a lead wire restricting member disposed within the base body of the pin so as to route the lead wires away from each other in the radial direction of the base body and restricting the rotation angle of the base body within a predetermined range. When;

An annular fluorescent lamp characterized by comprising:

[2] The annular fluorescent lamp according to claim 1, wherein the lead wire regulating member regulates a rotation angle of the base body within a range of 90 ° to 270 °.

3. The annular fluorescent lamp according to claim 1, wherein the lead wire regulating member is a columnar rib disposed so as to protrude inwardly of the inner surface force of the base body.

[4] The base body includes a semi-cylindrical first base body provided with the base pins and the columnar ribs, and a semi-cylindrical second base body coupled to the first base body. The inner surface of the second base body is provided with a displacement regulating member that abuts on the columnar rib and regulates the displacement of the lead wire toward the second base body. The ring-shaped fluorescent lamp according to claim 3.

[5] Annular fluorescent lamp,

A luminaire body to which the annular fluorescent lamp is attached;

A lighting circuit for supplying power to the annular fluorescent lamp;

Comprising

The ring-shaped fluorescent lamp

It has a pair of filament electrodes sealed at both ends, a phosphor layer formed on the inner surface, and a discharge medium sealed inside, and in a ring shape so that the both ends face each other An annular valve formed;

A pair of lead wires respectively connected to each end of the pair of filament electrodes and extending outward from both ends of the bulb;

A hollow cylindrical base body rotatably disposed along the outer surface of the valve across both end portions of the valve; a base pin disposed on the outer surface side of the base body and connected to the lead wire; A base provided with a lead wire regulating member disposed in the base body so as to be routed away from each other in the radial direction of the base body and restricting the rotation angle of the base body within a predetermined range;

The lighting fixture characterized by comprising.