JP2012109153A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of improving heat dissipation properties.SOLUTION: The lighting fixture 11 is provided with a socket 42, a radiator 43, and a fixture body 41. The socket 42 has a lamp device 21 mounted. With the radiator 43, the lamp device 21 mounted on the socket 42 is in contact. The fixture body 41 has a convection forming part 57 formed having a body part 49 with the radiator 43 arranged at an upper part for enabling convection of air from an underside to a top-face side of the radiator 43 outside the body part 49.

Description

  Embodiments described herein relate generally to a lighting fixture including a radiator.

  2. Description of the Related Art Conventionally, embedded lighting fixtures such as downlights are installed by embedding the main body of the fixture main body in an embedding hole provided in a ceiling plate or the like. In many cases, the main body portion of the instrument main body is formed in a cylindrical shape having the same diameter, and a socket is disposed in an upper portion of the main body portion, and a light source that is detachably attached to the socket is accommodated in the main body portion.

JP 2009-104958 A

  When the light source is an incandescent light bulb, the embedded lighting fixture is not required to have a high heat dissipation performance by the lighting fixture, but particularly in the case of a lamp device using an LED device, in order to suppress the temperature rise of the LED device. Therefore, it is necessary to ensure sufficient heat dissipation performance by the lighting fixture.

  This invention is made | formed in view of such a point, and it aims at providing the lighting fixture which can improve heat dissipation performance.

  The lighting fixture of embodiment is provided with a socket, a heat radiator, and a fixture main body. The socket is fitted with a lamp device. The lamp unit attached to the socket contacts the radiator. The appliance main body has a main body portion on which the heat dissipating body is disposed, and forms a convection forming portion that enables air convection from the lower surface side to the upper surface side of the heat dissipating body outside the main body portion.

  According to the present invention, since the lamp device mounted on the socket contacts the heat radiating body, the heat of the lamp device can be efficiently conducted to the heat radiating body, and further, the heat is dissipated by the convection forming portion formed outside the main body. Since convection of air from the lower surface side to the upper surface side of the body can be performed, heat can be efficiently radiated from the heat radiating body, and therefore, it can be expected that the heat radiation performance by the lighting fixture can be improved.

It is sectional drawing of the lighting fixture which shows one Embodiment. It is a perspective view of the decomposition | disassembly state of a lighting fixture same as the above. It is a perspective view of the assembly state of a lighting fixture same as the above. It is a perspective view of the lamp device of a lighting fixture same as the above.

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

  As shown in FIG. 1, the luminaire 11 is an embedded luminaire such as a downlight, and is installed in a state of being embedded in a circular embedding hole 13 provided in an installation portion 12 such as a ceiling board. ing.

  As shown in FIGS. 1 to 4, a flat lamp device 21 is used for the luminaire 11. The lamp device 21 has a cylindrical casing 22, and a glove 23 that emits light to the outside is attached to the lower surface of the casing 22.

  The housing 22 includes a cylindrical case 24 and a cylindrical base member 25 attached to the center of the upper surface of the case 24. A base part 26 is constituted by the upper surface side of the case 24 and the base member 25 protruding from the upper surface of the case 24. The casing 22 is made of, for example, an insulating synthetic resin, and the base member 25 is made of, for example, a metal such as aluminum die casting, a ceramic, or a resin excellent in thermal conductivity.

  The housing 22 accommodates a light emitting module in which a light emitting unit having a semiconductor light emitting element such as an LED element or an EL element is formed on a substrate, a lighting circuit for lighting the semiconductor light emitting element, and the like. The substrate of the light emitting module is attached in close contact with the inner surface of the base member 25 and is thermally bonded.

  On the periphery of the upper surface of the case 24, a plurality of lamp pins 27 for power supply, grounding, dimming signal, etc. are vertically projected.

  A plurality of key grooves 28 are formed on the peripheral surface of the base member 25. Each key groove 28 has a vertical groove 28a that communicates with the upper surface of the base member 25 and is formed along the vertical direction, and a horizontal groove 28b that is formed along the circumferential direction of the base member 25 at the bottom of the base member 25. It is formed in a substantially L shape. Further, a plurality of keys 29 are formed on the peripheral surface of the base member 25 so as to protrude between the plurality of key grooves 28. A heat radiating sheet 30 is attached to the upper surface of the base member 25.

  The globe 23 is made of light-transmitting synthetic resin or glass, and is provided with a triangular mark 31 indicating a mounting position on the lighting fixture 11 at one place on the lower surface.

  Note that the lamp device 21 of the present embodiment uses a COB (Chip On Board) type light emitting module in which a plurality of LED elements are mounted on a substrate, and the input power (power consumption) of the light emitting module is 20 to 25 W. The luminous flux is 1100 to 1650 lm.

  Also, as shown in FIGS. 1 to 3, the lighting fixture 11 is placed on a fixture body 41 that is also used as a reflector 40, a socket 42 arranged inside the fixture body 41, and an upper portion of the fixture body 41. A radiator 43, a plurality of mounting springs 44 attached to the peripheral surface of the radiator 43, a mounting plate 45 attached to the top of the radiator 43, and terminal blocks 46 and 47 attached to the mounting plate 45 are provided. Yes.

  The instrument main body 41 is made of, for example, metal, and includes a cylindrical main body portion 49 and an annular flange portion 50 that protrudes from the lower end of the main body portion 49 to the periphery. The main body portion 49 has an upper surface portion 51 and a peripheral surface portion 52 extending downward from the peripheral portion of the upper surface portion 51, and is opened downward. A circular fitting hole 53 is formed at the center of the upper surface portion 51, and a plurality of attachment holes 54 are formed at the periphery of the upper surface portion 51. A wiring hole 55 is formed at one location of the main body 49 across the upper surface 51 and the peripheral surface 52. A triangular mark 56 indicating the mounting position of the lamp device 21 is provided at one place on the inner peripheral surface of the main body 49.

  The diameter of the main body 49 is smaller than the diameter of the embedded hole 13, and the diameter of the flange portion 50 is formed larger than the diameter of the embedded hole 13. The peripheral surface portion 52 of the main body 49 is inclined so that the diameter on the lower side is the largest and the diameter on the upper side is gradually reduced. On the outer surface of the peripheral surface portion 52 of the main body portion 49, a convection forming portion 57 that allows convection of air from the lower surface side to the upper surface side of the radiator 43 is formed.

  The socket 42 includes a socket main body 59 made of, for example, an insulating synthetic resin and formed in an annular shape, and a plurality of terminals (not shown) arranged in the socket main body 59.

  An annular portion 60 is formed in the socket body 59, an inner cylinder 61 protruding upward from the inner periphery of the annular portion 60 is formed, and an outer cylinder 62 protruding downward from the outer periphery of the annular portion 60 is formed. . An insertion opening 63 through which the cap member 25 of the lamp device 21 is inserted is formed inside the inner tube 61, and an upper portion of the case 24 of the lamp device 21 can be fitted inside the outer tube 62.

  A plurality of bosses 65 to which a plurality of screws 64 for fixing the socket 42, the instrument main body 41, and the heat radiating body 43 are screwed are formed on the annular portion 60 so as to protrude upward, and each lamp pin 27 of the lamp device 21 is further formed. A plurality of connecting grooves 66 into which are inserted are formed in an elongated shape along the circumferential direction.

  A plurality of key grooves 67 are formed on the inner peripheral surface of the inner cylinder 61. Each key groove 67 is substantially L having a vertical groove 67a that communicates with the annular portion 60 and is formed along the vertical direction, and a horizontal groove 67b that is formed along the circumferential direction of the inner cylinder 61 at the top of the inner cylinder 61. It is formed in a letter shape. Further, on the inner peripheral surface of the inner cylinder 61, a plurality of keys 68 are formed so as to protrude between the plurality of key grooves 67. The key grooves 67 and 68 and the keys 29 and key grooves 28 of the lamp device 21 correspond to each other, and the lamp device 21 can be detachably attached to the socket 42.

  Each terminal is disposed on the upper side of each connection groove 66, and the lamp device 21 is attached to the socket 42, and each lamp pin 27 inserted into each connection groove 66 is electrically connected.

  Further, the heat radiating body 43 is formed of a material such as a metal such as aluminum die casting, ceramics, or a resin excellent in heat dissipation. The heat dissipating body 43 has a cylindrical base portion 70 and a plurality of heat dissipating fins 71 protruding radially from the periphery of the base portion 70.

  An attachment surface 72a to which the upper surface portion 51 of the instrument main body 41 is attached in contact with the peripheral portion of the base portion 70 and the lower surface of the radiating fin 71 is formed. A circular protrusion 73 is formed on the lower surface of the central portion of the base 70 so as to close the lower surface of the base 70 and protrude downward from the mounting surface 72a. A flat contact surface 72b is formed on the lower surface of the protrusion 73. Is formed. Inside the base portion 70, ribs (not shown) are formed radially.

  Between the plurality of heat radiation fins 71, gaps 74 are formed that open to the outer periphery, the lower surface, and the upper surface of the heat radiator 43. An inclined portion 75 is formed on the outer diameter side upper portion of the radiating fin 71 so as to cut out a corner portion. One of the gaps 74 between the radiating fins 71 communicates with the wiring hole 55 of the instrument body 41.

  A plurality of attachment portions 76 are formed around the base portion 70 of the radiator 43. Below these attachment portions 76, attachment holes 77 into which the screws 64 for fixing the socket 42, the instrument main body 41, and the radiator 43 are screwed are formed.

  The outer diameter dimension d1 of the radiator 43 is smaller than the maximum outer diameter dimension d2 as the maximum outer dimension of the main body section 49 of the instrument main body 41 and is larger than the outer diameter dimension d3 of the upper portion of the main body section 49. is there. Therefore, a part of the radiating fin 71 on the outer diameter side protrudes to the outer diameter side from the upper outer peripheral surface of the main body 49, and the lower surface of the heat radiating body 43 by the convection forming portion 57 formed on the outer surface of the main body 49. Air convection from the side to the top side is enabled.

  The attachment spring 44 is formed of a metal leaf spring, and includes a support piece 79 and a contact piece 80 bent from the lower end of the support piece 79. The upper end of the support piece 79 is fixed to the outer side surface of the mounting portion 76 of the radiator 43 with a screw 81, and the support piece 79 is arranged along the side surface of the main body portion 49 of the instrument main body 41. The contact piece 80 protrudes to the side of the instrument main body 41, and a substantially L-shaped hook portion 82 is formed at the tip of the contact piece 80.

  Further, the mounting plate 45 is made of, for example, metal, and is fixed with screws 84 in a state of being in contact with the upper surface of the radiator 43. The mounting plate 45 is formed with a terminal block mounting portion 85 that protrudes to the side of the radiator 43, and the terminal blocks 46 and 47 are mounted on the lower surface of the terminal block mounting portion 85. That is, the terminal blocks 46 and 47 are arranged at positions separated from the side of the heat radiating body 43 by the mounting plate 45.

  Further, the terminal block 46 is for power supply and grounding, and the terminal block 47 is for dimming signal, and the terminal blocks 46 and 47 and the socket 42 are connected by an electric wire (not shown). The electric wires are connected to the terminal blocks 46 and 47 through the gaps 74 between the socket 42 and the wiring holes 55 of the instrument main body 41 and the radiating fins 71 of the radiator 43.

  Next, assembly of the lighting fixture 11 will be described.

  The fitting hole 53 of the instrument body 41 is fitted around the protrusion 73 of the radiator 43, the socket 42 is inserted into the body part 49 of the instrument body 41, and the instrument body 41 is inserted between the socket 42 and the radiator 43. While being sandwiched, each screw 64 is screwed into the mounting hole 77 of the radiator 43 through the boss 65 of the socket 42 and the mounting hole 54 of the instrument body 41, and the instrument body 41 is sandwiched between the socket 42 and the radiator 43. These are fixed together in a state.

  When the socket 42 is inserted into the main body 49 of the instrument main body 41, the wires from the socket 42 previously drawn out from the wiring holes 55 of the instrument main body 41 are connected to the terminal blocks 46 and 47, and these terminals are connected. The mounting plate 45 to which the bases 46 and 47 are attached is fixed to the upper portion of the heat radiating body 43 with a plurality of screws 84.

  Each mounting spring 44 is fixed to the side surface of the radiator 43 with each screw 81.

  The contact surface 72b of the heat radiating body 43 is exposed above the insertion opening 63 of the socket.

  Next, installation of the luminaire 11 will be described.

  A power line, a ground wire, and a dimming signal line led in advance to the embedded hole 13 of the installation part 12 are drawn from the embedded hole 13 below the installation part 12, and each terminal block 46 of the luminaire 11 is provided. , 47.

  In a state where the contact piece 80 of each mounting spring 44 is elastically deformed and held so as to be along the side surface of the instrument body 41, first, the terminal block mounting portion 85 and the terminal blocks 46 and 47 of the mounting plate 45 face upward. As shown, the lighting fixture 11 is tilted, and the terminal block mounting portion 85 and the terminal blocks 46 and 47 of the mounting plate 45 are inserted diagonally into the embedding hole 13, and then the lighting fixture 11 is returned to be horizontal. The heat radiating body 43, the main body 49 of the instrument main body 41, and the mounting springs 44 are inserted into the embedding holes 13.

  When the hooking portion 82 of each mounting spring 44 moves above the embedding hole 13, the holding of each mounting spring 44 is released. As a result, the contact piece 80 of each mounting spring 44 expands to the side of the fixture body 41 due to the repulsive force against elastic deformation, and the contact piece 80 comes into contact with the upper edge of the embedding hole 13 so that the lighting fixture 11 is Pulling upward, the flange portion 50 comes into contact with the lower surface of the portion to be installed 12, and the installation is completed.

  And in the lighting fixture 11 of this embodiment, since the radiator 43 is formed in a size smaller than the maximum outer diameter of the main body 49 of the fixture main body 41, the radiator 43 attaches the fixture main body 41 to the embedded hole of the installation portion 12. Therefore, even if the radiator 43 is provided, the installation workability can be prevented from being deteriorated.

  Further, when the luminaire 11 is removed from the installation portion 12, the abutment piece of each mounting spring 44 that has moved down below the embedded hole 13 by lowering the luminaire 11 against the pulling force of each mounting spring 44. While elastically deforming 80 along the side of the fixture body 41, the main body portion 49 and the radiator 43 of the fixture body 41 are moved below the embedded hole 13, and the lighting fixture 11 is moved in the same manner as at the time of installation. The terminal block mounting portion 85 of the mounting plate 45 and the terminal blocks 46 and 47 are moved below the embedded hole 13 by tilting.

  Next, attachment of the lamp device 21 to the lighting fixture 11 will be described.

  The lamp device 21 is inserted inside the main body 49 of the fixture body 41, the mark 31 displayed on the lamp device 21 and the mark 56 displayed on the inner surface of the main body portion 49 of the fixture main body 41 are aligned, and the lamp device Push 21 up and insert into socket 42.

  Thereby, first, the base member 25 of the lamp device 21 is fitted into the insertion opening 63 of the socket 42, and then each key 68 of the socket 42 enters the vertical groove 28a of each key groove 28 of the base member 25, Each key 29 of the base member 25 enters the vertical groove 67a of each key groove 67 of the socket 42, and each lamp pin 27 of the lamp device 21 is inserted into each corresponding connection groove 66 of the socket 42. The upper surface contacts the contact surface 72b of the heat radiating body 43 through the heat radiating sheet 30.

  While the lamp device 21 is pressed against the heat radiating body 43, the lamp device 21 is rotated in the mounting direction, whereby each key 68 of the socket 42 enters and is caught in the lateral groove 28b of each key groove 28 of the base member 25. Then, each key 29 of the base member 25 enters into the lateral groove 67b of each key groove 67 of the socket 42 and is caught, and the lamp device 21 is attached to the socket 42. In addition, each lamp pin 27 of the lamp device 21 moves in each connection groove 66 of the socket 42 and comes into contact with and electrically connected to each terminal arranged above each connection groove 66.

  In the mounted state of the lamp device 21, the upper surface of the base member 25 of the lamp device 21 is in close contact with the contact surface 72b of the heat radiating body 43 via the heat radiating sheet 30, so that heat can be efficiently conducted from the lamp device 21 to the heat radiating body 43. .

  When the lamp device 21 is removed from the lighting fixture 11, first, the lamp device 21 is rotated in the removal direction opposite to that when the lamp device 21 is mounted, so that the socket is inserted into the vertical groove 28a of each key groove 28 of the base member 25. As each key 68 of 42 moves, each key 29 of the base member 25 moves to the vertical groove 67a of each key groove 67 of the socket 42, and each lamp pin 27 moves in each connection groove 66 of the socket 42 to move to each The terminal is separated from each terminal disposed on the upper side of the connection groove 66. Subsequently, by moving the lamp device 21 downward, the lamp pins 27 are detached from the connection grooves 66 of the socket 42, and the vertical grooves 28a of the key grooves 28 of the base member 25 are detached from the keys 68 of the socket 42. Each key 29 of the base member 25 is detached from the longitudinal groove 67a of each key groove 67 of the socket 42, and further, the base member 25 is detached from the insertion opening 63 of the socket 42, and the lamp device 21 can be removed from the socket 42.

  Next, lighting of the lamp device 21 will be described.

  When power is supplied to the lighting circuit from the power line through the terminal block 46, the terminal of the socket 42 and the lamp pin 27 of the lamp device 21, the lighting power is supplied from the lighting circuit to the semiconductor light emitting element of the light emitting module, and the semiconductor light emitting element is turned on. Light emitted when the semiconductor light emitting element is turned on passes through the globe 23 and is emitted from the lower surface opening of the instrument body 41.

  In addition, the heat generated by the semiconductor light-emitting element of the light-emitting module during lighting is mainly conducted to the base member 25 that is thermally bonded from the substrate of the light-emitting module, and from the base member 25 through the heat dissipation sheet 30. Then, the heat is efficiently conducted to the heat-dissipating body 43 that is in close contact with the heat-dissipating body 43, and the heat is dissipated into the air from the surface of the heat-dissipating body 43 including the plurality of heat-radiating fins 71.

  At this time, convection of air passing from the lower surface side to the upper surface side of the heat radiating body 43 through the gaps 74 between the plurality of heat radiating fins 71 can be formed by the convection forming portion 57 formed outside the main body portion 49. Therefore, heat can be efficiently radiated from the radiator 43.

  Further, a part of the heat conducted from the lamp device 21 to the radiator 43 is conducted to the fixture body 41, the plurality of attachment springs 44, and the attachment plate 45, respectively, and is also radiated into the air from these.

  According to the lighting fixture 11 of the present embodiment configured as described above, since the lamp device 21 attached to the socket 42 contacts the radiator 43, the heat of the lamp device 21 is efficiently conducted to the radiator 43. Can improve the heat dissipation performance.

  Furthermore, since the radiator 43 is formed to be smaller than the maximum outer diameter of the main body 49 of the instrument body 41, the radiator 43 is less likely to hinder the installation of the instrument body 41 in the embedded hole 13 of the installation part 12. It is possible to prevent a decrease in installation workability.

  Further, the terminal blocks 46 and 47 are arranged at positions separated from the side of the heat sink 43 by the mounting plate 45 protruding to the side of the heat sink 43 from the heat sink 43. The electric wires connected to the terminal blocks 46 and 47 can be hardly affected by the heat radiator 43. Generally, F cables are often used as the electric wires connected to the terminal blocks 46 and 47. Since the heat resistance temperature of the F cables is 60 to 70 ° C., the electric wires connected to the terminal blocks 46 and 47 are heat radiators. It is preferable to make it less susceptible to thermal influence from 43.

  In addition, the convection forming portion 57 formed outside the main body 49 enables convection of air from the lower surface side to the upper surface side of the heat radiating body 43, so that heat can be radiated efficiently from the heat radiating material 43 and heat radiating performance can be improved. .

  In addition, since the reflector 40 that is also used as the instrument body 41 is sandwiched and fixed between the socket 42 and the heat radiating body 43, these can be easily assembled together with the screw 64, and the assemblability can be improved.

  Furthermore, since the radiator 43 is provided with a contact surface 72b that contacts the lamp device 21 so as to protrude from the mounting surface 72a that sandwiches the reflector 40 with the socket 42, there is no contact between the reflector 40 and the contact surface 72b. The steps can be eliminated and the surfaces can be flush with each other, and the lamp device 21 can be securely adhered to the contact surface 72b.

  In addition, since a plurality of mounting springs 44 are attached to the heat radiating body 43, these mounting springs 44 install the heat radiating body 43 having a large mass among the components of the lighting fixture 11 and positioned above the fixture main body 41. It can support the part 12 stably. In addition, since heat is efficiently conducted from the radiator 43 to the plurality of attachment springs 44, a heat radiation effect from the plurality of attachment springs 44 to the air can be obtained, and the heat dissipation performance of the lighting fixture 11 can be improved.

  Further, since the wiring hole 55 of the instrument body 41 and the gap 74 between the radiation fins 71 of the radiator 43 are communicated with each other, the wires connecting the terminal blocks 46 and 47 and the socket 42 are connected from the socket 42 to the instrument body 41. The wiring hole 55 and the gap 74 between the heat dissipating fins 71 of the heat dissipating body 43 can be used for wiring.

  Further, since the mark 31 is provided on the lamp device 21 and the mark 56 is provided on the instrument main body 41, the lamp device 21 can be easily adjusted to a position where it can be correctly inserted into the socket 42.

  Note that the luminaire 11 may be a radiating fan that forcibly forms an air flow with respect to the radiator 43 and effectively radiates heat. In this case, the power supply of the heat radiating fan may be taken from the socket 42 or the terminal block 47 for dimming signal.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Lighting equipment
21 Lamp device
41 Instrument body
42 socket
43 radiator
49 Main unit
57 Convection formation section

Claims (1)

A socket in which the lamp device is mounted;
A radiator that contacts the lamp device mounted in the socket;
An instrument main body having a main body portion on which the heat dissipating body is disposed, and having a convection forming portion formed on the outer side of the main body portion that enables air convection from the lower surface side to the upper surface side;
The lighting fixture characterized by comprising.

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