JP2012216305A - Lamp device and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp device, and a lighting fixture using the same, with heat of a light-emitting body emitting illumination light efficiently radiated and with light extraction efficiency improved.SOLUTION: The lamp device 1 is provided with a device body 4 equipped with a cylindrical chassis 16 having an opening 19 at one end side 16a and a flat-plate part 20 at the other end side 16b, a cylindrical protruded body 17 formed in protrusion outward at a center part of the flat-plate part 20, and an insertion-through part 18 formed at the flat-plate part 20 inside the protruded body 17, a light-emitting body 2 housed inside the protruded body 17 for causing emission light to be emitted from the opening 19 passing through the insertion-through part 18, a lens 3 arranged inside the device body 4 so as to be properly faced to the light-emitting body 2 for converging emission light from the light-emitting body 2 toward an opening 19 side, a lighting device 5 arranged around the insertion-through part 18 inside the flat-plate part 20 of the device body 4 for supplying power to the light-emitting body 2, and a translucent cover 6 arranged at the opening 19 of the device body 4.

Description

  Embodiments described herein relate generally to a lamp device in which emitted light of a light emitter is controlled and a lighting fixture using the lamp device.

  Conventionally, as a flat lamp device, a lamp device using a GX53 type base has been provided. In some lamp devices, light emitted from the lamp device is distributed at a narrow angle by a light control body to obtain a light distribution suitable for downlights and spotlights (see, for example, Patent Document 1). This prior art lamp device has an annular abutting surface provided with a pair of lamp pins and a projecting portion projecting from the center side of the abutting surface to one surface side, and an LED on the top side inner wall surface of the projecting portion. Is mounted, a flat lamp device main body (housing) that emits LED light from at least the other surface side, and a light control body having a cylindrical reflection surface portion is provided in the lamp device main body. On the other hand, it is arrange | positioned in the other surface side direction.

  That is, the module substrate is fixed in a state where the contact surface of the substrate is in thermal contact with the top side inner wall surface of the protruding portion so that the LED is positioned at the center of the lamp device. Thereby, the heat which LED generate | occur | produces is thermally radiated from the protrusion part to the fixture main body of a lighting fixture, and is radiated. And the lighting device which lights LED is accommodated and arrange | positioned by the cyclic | annular space part between a lamp device main body and the outer peripheral surface of the reflective surface part of a light control body.

JP 2010-262781 (page 5, FIG. 1)

  When the module substrate is arranged on the inner wall surface on the top side of the protruding portion, when a part of the emitted light of the LED is repeatedly reflected by the light control body, the reflected light is attenuated and the light extraction efficiency is reduced. Have

  An embodiment of the present invention aims to provide a lamp device in which heat of a light emitting body that emits illumination light is dissipated and light extraction efficiency is improved, and a lighting fixture using the lamp device.

  The lamp device of the embodiment includes a device main body, a light emitter, a lens, a lighting device, and a translucent cover.

  The apparatus main body is formed having a housing, a protrusion, and an insertion portion. The housing is formed in a cylindrical shape having an opening at one end and a flat plate at the other end. The protruding body is formed in a cylindrical shape that protrudes outward from the central portion of the flat plate portion. The insertion part is formed in the flat plate part inside the protrusion.

  The luminous body is disposed in the projecting body so that the emitted light passes through the insertion portion of the apparatus main body and exits from the opening.

  The lens is disposed in the apparatus main body so as to face the light emitter, and is formed so as to collect radiated light from the light emitter on the opening side of the apparatus main body.

  The lighting device is disposed inside the flat plate portion of the device main body and around the insertion portion, and is configured to supply power to the light emitter.

  The translucent cover is disposed in the opening of the apparatus main body.

  According to the embodiment of the present invention, since the emitted light from the light emitter is condensed on the opening side of the apparatus main body by the lens, the ratio of the emitted light directly emitted from the opening of the apparatus main body can be increased. Even if a light control body is provided, it is possible to reduce the loss accompanying the attenuation of the radiated light, and it can be expected that the light extraction efficiency is improved.

It is a schematic front view of the lamp device which shows the 1st Embodiment of this invention. Similarly, a lamp device is shown, (a) is a schematic top view, and (b) is a schematic bottom view. Similarly, it is a schematic front sectional view of the lamp device. It is a schematic front view of the lamp device which shows the 2nd Embodiment of this invention. It is a schematic perspective view of the lighting fixture which shows the 3rd Embodiment of this invention. Similarly, it is a partially cutaway schematic front view of a lighting fixture.

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

  The lamp device 1 of this embodiment is configured as shown in FIGS. In FIG. 3, the lamp device 1 includes a light emitter 2, a lens 3, a device body 4, a lighting device 5, and a cover 6.

  The light emitter 2 is formed to have a flat substrate 7, a plurality of LED bare chips 8 provided on one surface 7 a of the substrate 7, and a sealing resin 9 that covers the LED bare chips 8. The substrate 7 is made of, for example, an aluminum (Al) plate, and is formed in a substantially rectangular shape. The LED bare chip 8 is mounted on one surface 7a via an insulating layer (not shown) to form a wiring pattern (not shown). The LED bare chips 8 are connected in series by a wiring pattern. Further, a connector 10 is disposed on one surface 7 a of the substrate 7, and the output cord 11 of the lighting device 5 is connected to the connector 10.

  The LED bare chips 8 are mounted in a planar shape by being mounted on one surface 7a of the flat substrate 7, and a plurality of the LED bare chips 8 are mounted in a matrix, for example. The LED bare chip 8 emits blue light, for example. On one surface 7a of the substrate 7, a plurality of LED bare chips 8 are surrounded, and for example, a silicone resin bank 12 is formed in a rectangular shape. The inside of the bank 12 is filled with a sealing resin 9, and the LED bare chip 8 is filled. The outer surface of the sealing resin 9 is formed in a flat shape.

  The sealing resin 9 is a translucent silicone resin, for example, and a yellow phosphor 13 is mixed therein. When the blue light emitted from the LED bare chip 8 is incident, the yellow phosphor 13 converts the wavelength of the blue light into yellow light. The yellow light and the blue light emitted from the LED bare chip 8 are emitted from the outer surface of the sealing resin 9 and mixed (mixed light), whereby white light is emitted from the light emitter 2. The outer surface of the sealing resin 8 is a light emitting surface of the light emitter 2.

  The lens 3 is made of, for example, glass, and is formed in a hemispherical shape having a concave portion 14 that accommodates the rectangular bank 12 of the light emitter 2 on the inner side, and has a pair of ear portions 15, 15 protruding outward on the bottom surface side thereof. Is formed. In the lens 3, the pair of ear portions 15, 15 are fixed to the one surface 7 a side of the substrate 7 with an adhesive, for example, so that the rectangular bank 12 is accommodated in the concave portion 14. That is, the lens 3 is disposed in the apparatus main body 4 so as to face the light emitter 2. The lens 3 is formed so as to collect the radiated light of the light emitter 2 on the center 6 c side of the cover 6 or the opening 19 side of the apparatus main body 4.

  The apparatus main body 4 is formed having a housing 16, a projecting body 17, and an insertion part 18. The casing 16 and the projecting body 17 are integrally formed of a synthetic resin such as polybutylene terephthalate (PBT) resin.

  The housing | casing 16 is formed in the cylindrical shape which has the opening part 19 in the one end side 16a, and the flat plate part 20 in the other end side 16b. The protruding body 17 is formed to protrude outward in a substantially cylindrical shape at the center of the flat plate portion 20. The insertion portion 18 is formed in a circular shape in the flat plate portion 20 inside the projecting body 17. A pair of lamp pins 21 and 21 (only one is shown in the figure) adjacent to the projecting body 17 are disposed on the upper surface 20a of the flat plate portion 20.

  In addition, a heat radiating member 22 molded by, for example, aluminum die casting is attached to the upper surface of the projecting body 17. The heat radiating member 22 is provided so as to face the insertion portion 18. On the inner surface 22b side of the heat radiating member 22, a thick and rectangular parallelepiped mounting portion 23 is formed to project. The light emitter 2 is attached to the attachment portion 23 in surface contact with a screw (not shown) through an insulating material (not shown).

  A substantially rectangular parallelepiped fixing portion 24 is formed from the attachment portion 23 toward the outer peripheral edge of the heat radiating member 22. A key portion 25 is provided at the tip of the fixing portion 24. Further, the fixing portion 24 is provided with a screw hole 26. As shown in FIG. 2A, three fixing portions 24 are formed at 120 ° intervals with respect to the center 22 c of the heat radiating member 22.

  As shown in FIG. 3, a cylindrical dowel 28 having a stepped through hole 27 is formed on the upper surface 20 a of the flat plate portion 20 so as to abut on the fixing portion 24. A screw 29 inserted into the through hole 27 from the lower surface 20 b of the flat plate portion 20 is screwed into the screw hole 26 of the fixing portion 24. Thereby, the heat radiating member 22 is attached to the protrusion 17. The protrusion 17 has a portion corresponding to the fixing portion 24 cut out.

  The heat radiating member 22 slightly protrudes in the normal direction of the outer peripheral surface from the outer peripheral surface of the projecting body 17, and the key portion 25 further protrudes. The heat radiating member 22 substantially seals the protrusion 17. The key part 25 is inserted and attached to a key groove of a socket to which the lamp device 1 is attached.

  A heat radiating sheet (not shown) is disposed on the upper surface 22 a of the heat radiating member 22. The upper surface 22a side of the screw hole 26 of the heat dissipation member 22 is closed by the heat dissipation sheet.

  The pair of lamp pins 21 and 21 are made of metal, and are formed in a substantially cylindrical shape whose top side is formed in a substantially hemispherical shape so as to be adjacent to the protrusion 17 and protrude upward from the upper surface 20a of the flat plate portion 20. Is provided. The lamp pins 21 and 21 are provided corresponding to power input terminals 31 and 31 (only one is shown in the figure) provided on the circuit board 30 of the lighting device 5, and the lighting device 5 is connected to the device body 4. When housed in the housing 16, it is provided at a location located in the vicinity of the power input terminals 31, 31.

  A pair of dowels 32 having through holes (not shown) projecting downward with a small projecting length are formed on the lower surface 20 b of the flat plate portion 20. The lamp pin 21 is press-fitted and attached to the dowel 32. The lamp pin 21 is inserted through a lead wire 33 connected to the power input terminal 31 and soldered to the lead wire 33 on the top side. Thus, the pair of lamp pins 21 and 21 are electrically connected to the pair of power input terminals 31 and 31 of the lighting device 5.

  Further, on the lower surface 20 b of the flat plate portion 20, a cylindrical protruding portion 34 that protrudes downward is formed in the circumference of the insertion portion 18. The insertion part 18 is formed to be slightly smaller than the circular central opening 35 of the circuit board 30. And the notch part which is not shown in figure in which the output code 11 of the lighting device 5 is penetrated is provided in the protrusion part 34. As shown in FIG.

  As shown in FIG. 1, triangular recesses 36 are formed at regular intervals on the outer peripheral surface of the housing 16 on the flat plate portion 20 side in order to increase the heat dissipation area.

  In FIG. 3, a light control body 37 is disposed in the apparatus main body 4. The light control body 37 is formed by, for example, aluminum die casting, and has a circular truncated cone shape that is continuously and gradually narrowed from the one end side 37a toward the other end side 37b. A flange portion 38 having a shape is formed. The light control body 37 has a circular one end side opening 39 on one end side 37a and a circular other end side opening 40 on the other end side 37b, and an inner surface 37d thereof is formed on a reflection surface.

  The other end side 37 b of the light control body 37 is inserted through the central opening 35 of the circuit board 30 of the lighting device 5 and is inserted into the projecting body 17. Then, by attaching the cover 6 to the opening 19 of the housing 16, the other end side opening 40 faces the light emitter 2, the one end side opening 40 is positioned in the opening 19, and the flange portion 38 is The cover 6 is in contact with the inner surface 6b.

  The lighting device 5 has a lighting circuit 42 formed by a circuit board 30 and a lighting circuit component 41 mounted on the circuit board 30. The circuit board 30 is made of, for example, a glass epoxy material, is formed in a substantially circular shape, and is provided with a circular central opening 35 having a notch not shown in the center thereof. On one surface 30a around the central opening 35, a lighting circuit component 43 made up of many types and many electronic components such as resistors R1 and R2, a capacitor C1, and a transformer T1 is mounted. The other surface 30b of the circuit board 30 is a solder surface of the lighting circuit component 41, and a small surface mount component such as the switching element Q1 is mounted thereon.

  A lighting circuit 42 is formed by a wiring pattern (not shown) formed on the lighting circuit component 41 and the circuit board 30. The lighting circuit 42 is formed by a known configuration that supplies power to the LED bare chip 8 of the light emitter 2. The circuit board 30 is located inside the flat plate portion 20 and around the insertion portion 18 so that the central opening 35 faces the protrusion 34 (insertion portion 18) formed in the flat plate portion 20 of the housing 16. It is arranged. That is, the lighting device 5 is housed in the device body 4 such that the circuit board 30 is sandwiched between the projecting portion 34 and the light control body 37.

  The cover 6 is disposed in the opening 19 of the housing 16 of the apparatus body 4. The cover 6 is molded from, for example, polycarbonate (PC) resin having translucency and light diffusibility. The outer surface 6a is a flat surface and is formed in a circular shape. The inner surface 6 b is provided with a plurality of intermittent solid bodies 43 along the inner surface 19 b of the opening 19. Some of the raised bodies 43 are provided with a locking claw 44, and the locking claw 44 is locked in a locking groove 45 formed in the inner surface 19 b of the opening 19. Thereby, the cover 6 is attached to the opening 19 of the apparatus main body 4. And the cover 6 is attached so that the inside of the apparatus main body 3 may be obstruct | occluded substantially.

  Further, on the peripheral side of the outer surface 6 a of the cover 6, rectangular parallelepiped finger-hanging portions 46, 46 are formed to project. As shown in FIG. 2 (b), the finger-hanging portions 46, 46 are provided with 180 ° rotational symmetry. Further, a triangular mark 47 is provided on the peripheral side of the outer surface 6a to display the mounting position on the lighting fixture.

  Next, the operation of the first embodiment will be described.

  The protrusion 17 of the apparatus body 4 is inserted into an insertion portion of a socket device (not shown), the pair of lamp pins 21 and 21 are inserted into the connection holes of the socket apparatus, and the apparatus body 4 is rotated, whereby a pair of lamp pins 21 and 21 are electrically connected to a pair of receptacles of the socket device. Thereby, the lighting device 5 can supply an external power supply via the socket device.

  In addition, when inserting the protrusion 17 in the insertion part of a socket apparatus, the mark 47 of the cover 6 is matched with the alignment mark provided in a lighting fixture or a socket apparatus. The key portion 25 of the heat radiating member 22 is inserted into the key groove of the socket device when the protruding body 17 is inserted into the insertion portion of the socket device, and into the key groove when the device body 4 is rotated. Fixed.

  When the external power supply is turned on, an AC voltage (for example, AC100V) of the external power supply is input to the lighting device 5 through the pair of lamp pins 21 and 21 and the lead wires 33 and 33. In the lighting device 5, the lighting circuit 43 operates and supplies power to the light emitter 2 via the output code line 11. As a result, the LED bare chip 8 is turned on, and white light is emitted from the light emitter 2.

  The lens 3 is disposed in the apparatus main body 4 so as to face the light emitter 2. The light emitted from the light emitter 2 enters the lens 3, passes through the lens 3, and is emitted from the outer surface 3 a side of the lens 3. Then, the light is refracted so as to be condensed on the center 6 c side of the cover 6 when the light is emitted from the outer surface 3 a of the lens 3. That is, most of the radiated light is refracted to the one end side opening 39 side (the opening 19 side of the housing 16) of the light control body 37 and radiated toward the opening 19 side. The ratio toward the body 37 side decreases.

  The emitted light enters the cover 6 disposed in the opening 19 of the housing 16, is diffused in the cover 6, and is emitted outward from the outer surface 6 a of the cover 6. The emitted light illuminates the outer surface to be irradiated and the object to be irradiated.

  Moreover, heat is generated in the light emitter 2 by lighting the LED bare chip 8. This heat is transferred to the attachment portion 23 of the heat dissipation member 22 attached to the protrusion 17 of the apparatus body 4. Then, heat is transferred from the heat radiating member 22 to the fixture body of the lighting fixture that is in contact with the heat radiating member 22 to be radiated. The heat dissipating member 22 is formed of a metal having thermal conductivity, for example, aluminum (Al), and the light emitter 2 is attached in surface contact, so that the heat generated by the light emitter 2 is rapidly conducted. And discharged to the outside of the lamp device 1.

  According to the present embodiment, the lamp device 1 can conduct heat generated in the light emitter 2 to the heat radiating member 22 to dissipate the heat from the heat radiating member 22, and the emitted light of the light emitter 2 is controlled by the lens 3. Since the light is emitted so as to be condensed on the one end side opening 29 side of the light body 37 (the opening portion 19 side of the apparatus body 4), the ratio of direct emission from the one end side opening 39 of the light control body 37 can be increased. Thus, the loss associated with the attenuation of the radiated light by the light control body 37 can be reduced, and this has the effect that the light extraction efficiency from the cover 6 can be improved.

  And by providing the cover 6 having light diffusibility in the opening 19 of the apparatus main body 4, the emitted light of the light emitter 2 collected on the opening 19 side of the apparatus main body 4 can be diffused, This has the effect of illuminating a surface to be irradiated or an object to be irradiated with diffused light with improved light extraction efficiency.

  In addition, since the proportion of the light emitted from the light emitter 2 reflected by the light control body 37 is reduced, light loss can be minimized without forming a reflective film on the inner surface 37d of the light control body 37. Since the light control body 37 is not provided with a reflective film, the lamp device 1 can be formed at low cost.

  In the present embodiment, the cover 6 may not have light diffusibility. Further, a Fresnel lens may be formed on the inner surface 6 a side of the cover 6 so that the light emitted to the opening 19 of the housing 16 is further condensed.

  Further, although the lens 3 is provided on the substrate 7 of the light emitter 2, the lens 3 may be disposed in the light control body 37 on the other end side opening 40 side so as to face the light emitter 2.

  Moreover, the light control body 37 does not need to be provided. In this case, a blindfold plate or the like may be provided so that the lighting device 5 or the like cannot be seen from the outside through the cover 6.

  Further, although the light emitter 2 is formed using the substrate 7, the LED bare chip 8 may be formed on the mounting portion 23 of the heat dissipation member 22 without using the substrate 7. In this case, since the heat radiating member 22 is a metal, an insulating layer is formed on the mounting portion 23, and the LED bare chip 8 and the like are mounted on the insulating layer.

  The apparatus body 4 may be provided with a dimming pin in addition to the lamp pins 21 and 21 on the flat plate portion 20, and the dimming pin is connected to the lighting circuit 43 to adjust the LED bare chip 8 of the light emitter 2. You may form so that light may be lighted.

  Next, a second embodiment of the present invention will be described.

  As shown in FIG. 4, the LED lamp 48 of the second embodiment is provided with a Fresnel lens 49 as a lens instead of the lens 3 of the lamp device 1 shown in FIG. 3. In addition, the same code | symbol is attached | subjected to the part same as the lamp apparatus 1, and description is abbreviate | omitted.

  The substrate 7 of the light emitter 2 is provided with a light distribution member 50 to which the Fresnel lens 49 is directly opposed. The light distribution member 50 is provided with, for example, a flat part 51 formed in a rectangular or circular shape, and a substantially cross section formed so as to stand substantially perpendicularly from both sides of the flat part 51 and facing opposite sides. It has a pair of L-shaped attachment pieces 52, 52.

  The light distribution member 50 is made of, for example, polycarbonate (PC) resin having translucency. A plurality of Fresnel lenses 49 are formed concentrically outward from the center 51 c on the outer surface side of the flat portion 51, and the formation region is a formation region in the bank 12 of the light emitter 2 (light emission of the light emitter 2). It is formed so as to be as large as possible. And the Fresnel lens 49 is formed so that the emitted light of the light-emitting body 2 may be condensed to the center 51c side. The Fresnel lens 49 can be formed by cutting or molding with a mold material.

  The light distribution member 50 has a pair of attachment pieces 52 and 52 fixed to the substrate 7 of the light emitter 2 with, for example, an adhesive so that the Fresnel lens 49 faces the light emitter 2.

  The emitted light of the light emitter 2 is condensed by the Fresnel lens 49 on the one end side opening 39 side (the opening 19 side of the housing 16) of the light control body 37, and enters the cover 6 from the one end side opening 39. The light is diffused in 6 and emitted outward.

  According to the present embodiment, the light emitted from the light emitter 2 is emitted by the Fresnel lens 49 so as to be condensed on the one end side opening 39 side of the light control body 37 (the opening 19 side of the apparatus body 4). The ratio of light emitted directly from the one end side opening 39 of the light body 37 can be increased, and the loss accompanying the attenuation of the radiated light by the light control body 37 can be reduced, thereby improving the light extraction efficiency from the cover 6. It has the effect of being able to.

  Further, since the light distribution member 50 on which the Fresnel lens 49 is formed is formed of synthetic resin, the light distribution member 50 is relatively lightweight, and thus has an effect that the lamp device 48 can be reduced in weight.

  In the present embodiment, the Fresnel lens 49 may be disposed in the light control body 37 on the other end side opening 40 side so as to face the light emitter 2.

  Next, a third embodiment of the present invention will be described.

  3rd Embodiment is the lighting fixture 53 of this invention, and is comprised as shown in FIG. 5 and FIG. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.

  The lighting fixture 53 is a downlight embedded in a ceiling or the like. In FIG. 6, the lighting fixture 53 includes a fixture main body 55 having a socket device 54 as a socket and the lamp device 1 shown in FIG.

  The instrument body 55 is molded by aluminum die casting, has an opening 56 on the lower end side 55a and an annular flange portion 57 protruding outward, closes the upper end side 55b on the upper end side 55b, and is formed in a flat shape. It is formed in a substantially cylindrical box having an upper plate portion 58. Further, on the outer surface 55c of the instrument body 55, reinforcing pieces 59, 60 that also serve as a plurality of heat radiation fins are formed. Furthermore, a pair of attachment springs 61 and 61 are provided on the lower end side 55a of the outer surface 55c to hold the ceiling or the like between the flange portion 57 and the like. And the inner surface 55d of the instrument main body 55 is formed in the reflective surface by white coating, for example.

  A top plate 62 is attached to the outer surface of the upper plate portion 58 with screws 63 or the like. As shown in FIG. 5, the top plate 62 has a terminal block 64 attached to its lower surface 62a. A power supply line (not shown) from an external power supply and a lead wire (not shown) connected to the socket device 54 are connected to the terminal block 64, respectively. A triangular alignment mark 65 for aligning with the mark 47 of the lamp device 1 is provided on the inner surface 55d of the instrument body 55.

  As shown in FIG. 6, the socket device 54 is attached to the inner surface of the upper plate portion 58 with screws (not shown). The socket device 54 is formed with a known configuration to which the protruding body 17 of the device main body 4 is attached. The lamp device 1 is mounted on the socket device 54. In the lamp device 1, the protrusion 17 (not shown) is inserted into an insertion portion (not shown) of the socket device 54, and the pair of lamp pins 21 and 21 (not shown) is a pair of connection holes (not shown) of the socket device 54. After being inserted into the socket device, it is fixed to the socket device 54 by being rotated, and the pair of lamp pins 21 and 21 are electrically connected to a pair of receptacles (not shown) of the socket device 54.

  When an external power supply is supplied to the terminal block 64, the lighting fixture 53 turns on the LED bare chip 8 (not shown) of the lamp device 1 and emits white light from the light emitter 2 (not shown). Light passes through the cover 6. White light is emitted outward from the opening 56 of the instrument body 55 and illuminates the surface to be irradiated, for example, the floor surface.

  Since the lighting fixture 53 is equipped with the lamp device 1 with improved light extraction efficiency, it has an effect that the irradiated surface, for example, the floor surface can be illuminated with an illuminance of a predetermined value or more.

  DESCRIPTION OF SYMBOLS 1,46 ... Lamp apparatus, 2 ... Luminescent body, 3 ... Lens, 4 ... Apparatus main body, 5 ... Lighting apparatus, 6 ... Cover, 16 ... Housing, 17 ... Projection body, 18 ... Insertion part, 19 ... Opening part, DESCRIPTION OF SYMBOLS 20 ... Flat plate part 49 ... Fresnel lens as a lens, 53 ... Lighting fixture, 54 ... Socket, 55 ... Instrument main body

Claims (2)

A cylindrical housing having an opening on one end and a flat plate on the other end, a cylindrical protrusion formed outwardly projecting from the central portion of the flat plate, and the flat plate inside the protrusion An apparatus body having a formed insertion portion;
A light emitter disposed in the projecting body so that emitted light passes through the insertion portion and exits from the opening;
A lens disposed in the apparatus main body so as to face the light emitter and condensing the emitted light from the light emitter on the opening side;
A lighting device that is disposed inside the flat plate portion of the device body and around the insertion portion, and supplies power to the light emitter;
A translucent cover disposed in the opening of the apparatus body;
A lamp device comprising: A lamp device according to claim 1;
An instrument body having a socket to which the lamp device is connected;
The lighting fixture characterized by comprising.

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