JP2016162705A - Light fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light fixture that can improve an efficiency of optical output.SOLUTION: A light fixture 10 comprises a radiator 18, a light emitting module 16, and a cover 19. The light emitting module 16 comprises a substrate 22 and a plurality of light emitting elements 23 mounted on the substrate 22, and is arranged on the radiator 18. The cover 19 comprises: a cover part 37 covering the light emitting module 16; a plurality of lens parts 51 provided integrally with the cover part 37 so as to be opposed to the light emitting elements 23; a fixing part 41 provided in the cover part 37, screwed to the radiator 18, and pressing an inside part of the substrate 22 against the radiator 18; and a pressing part 47 pressing an outer peripheral portion of the substrate 22 against the radiator 18.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting element.

  Conventionally, for example, in a lighting device for a high ceiling, a light emitting module in which a plurality of light emitting elements are mounted on a substrate is used. An optical member such as a lens or a reflector is disposed, and a lower surface cover is disposed so as to cover the light emitting module and the optical member.

  In such a luminaire, light emitted from the light emitting element is transmitted through the optical member and the lower surface cover, respectively, so that light transmission loss increases and the efficiency of light output is likely to decrease.

  In addition, if the contact between the substrate and the heat sink is not sufficiently ensured due to the distortion of the substrate, etc., the heat dissipation from the substrate to the radiator will decrease, so the temperature of the light emitting element will rise and the light emission efficiency will decrease, resulting in light output The efficiency of

JP 2013-201080 A

  The problem to be solved by the present invention is to provide a lighting fixture capable of improving the efficiency of light output.

  The lighting fixture of embodiment is provided with a heat radiator, a light emitting module, and a cover. The light emitting module includes a substrate and a plurality of light emitting elements mounted on the substrate, and is disposed in the heat radiator. The cover includes a cover portion that covers the light emitting module, a plurality of lens portions that are integrally provided in the cover portion so as to face the light emitting element, and is screwed to the heat sink that is provided on the cover portion, and the heat sink on the inner side of the substrate And a pressing portion that presses the outer peripheral portion of the substrate against the radiator.

  According to the present invention, it can be expected that the efficiency of light output is improved.

It is sectional drawing of the lighting fixture which shows one Embodiment. It is a perspective view of a lighting fixture same as the above. 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 heat radiator, light emitting module, and cover of a lighting fixture same as the above. It is a perspective view of the cover of a lighting fixture same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 5.

  As shown in FIG. 2, the luminaire 10 is installed on a high ceiling in a building such as a gymnasium, and is used to illuminate a wide illumination space.

  The lighting fixture 10 includes a lighting unit 11, a housing 12 to which the lighting unit 11 is attached, and a power supply device 13 that supplies power to the lighting unit 11.

  As shown in FIGS. 1 to 4, the lighting unit 11 includes a plurality of light emitting modules 16, a plurality of insulating sheets 17, a radiator 18, and a plurality of covers 19.

  As shown in FIGS. 1, 3, and 4, the light emitting module 16 includes a substrate 22, a plurality of light emitting elements 23 mounted on one surface of the substrate 22, and a connector 24. Furthermore, a plurality of chip-shaped capacitors 25 connected to the respective light emitting elements 23 are mounted on one surface of the substrate 22.

  One surface of the substrate 22 is a mounting surface 22a on which components are mounted, and the other surface is a contact surface 22b in contact with the radiator 18. The substrate 22 is based on a metal such as aluminum, for example. An insulating layer is formed on one surface of the metal base, and a wiring pattern is formed on the insulating layer. The light emitting element 23, the connector 24, and the capacitor 25 are formed on the wiring pattern. Has been implemented. The substrate 22 is formed in a substantially square shape, and wiring grooves 26 are provided at one corner. A plurality of holes 22 c are provided in the inner portion of the substrate 22. In the present embodiment, there are two hole portions 22c, one hole portion 22c is disposed in the vicinity of the wiring groove 26, and the other hole portion 22c is a corner portion of the substrate 22 opposite to the wiring groove 26. It is arranged in the vicinity.

  For example, SMD (Surface Mount Device) type LEDs are used as the light emitting elements 23, and the light emitting elements 23 are arranged at predetermined intervals on the entire surface of the substrate 22. In the case of using an LED, a COB (Chip On Board) module may be used as the light emitting module 16. Further, as the light emitting element 23, an EL (Electro Luminescence) element or the like may be used.

  The connector 24 is electrically connected to a feeder line with a connector drawn from the power supply device 13. The connector 24 is arranged such that the connection direction A (see FIG. 4) of the power supply line to the connector 24 faces the wiring groove 26 and is parallel along one side of the substrate 22.

  The plurality of light emitting modules 16 are formed in a common structure. In the present embodiment, four light emitting modules 16 are used, arranged in a quadrangular shape so that the wiring grooves 26 of the substrate 22 face each other, and arranged on the radiator 18.

  In addition, the insulating sheet 17 has an insulating property, adhesiveness, and thermal conductivity, and is formed in an outer shape slightly larger than the outer shape of the substrate 22. A plurality of insertion holes 17 a are formed in the insulating sheet 17 at positions that are coaxial with the hole portions 22 c of the respective substrates 22. The insulating sheet 17 is interposed between the substrate 22 and the radiator 18 to insulate them.

  As shown in FIGS. 1 to 4, the radiator 18 includes a main body 29, a plurality of heat radiating fins 30 projecting upward from the upper surface of the main body 29, and one direction of the main body 29. Attachment portions 31 are provided on both sides orthogonal to each other.

  The radiator 18 is integrally formed by extrusion molding with a metal material such as aluminum. Therefore, the radiator 18 is formed in the same cross-sectional shape along the extrusion direction P (see FIGS. 3 and 4) which is one direction.

  The main body 29 is substantially square and has a thickness greater than that of the heat radiating fin 30. A flat mounting surface 32 for mounting the light emitting module 16 is formed on the lower surface of the main body 29. Attachment positions 33 for attaching the four light emitting modules 16 are provided at four locations corresponding to the four corners of the attachment surface 32, respectively. A fixing hole 18a is formed through each attachment position 33 at a position coaxial with the hole 22c of each substrate 22. In the center of the attachment surface 32 and between the four attachment positions 33, a wiring hole 18b through which the feeder line passes is formed.

  The plurality of radiating fins 30 are provided in parallel along the extrusion direction P with a predetermined interval therebetween. The thickness of the radiating fin 30 is formed thinner than the thickness of the main body 29. The heat radiating fins 30 are disposed above the respective attachment positions 33. Between the mounting positions 33 adjacent to each other in the direction orthogonal to the extrusion direction P, the heat radiating fins 30 are not provided, and a space portion 34 through which the wiring hole 18b communicates is formed.

  The attachment portion 31 protrudes upward from both side portions orthogonal to the extrusion direction P of the main body portion 29. A plurality of fixing holes 18c are formed in the mounting portion 31 so as to penetrate the direction parallel to the mounting surface 32 (horizontal direction).

  Further, as shown in FIGS. 1 to 5, the cover 19 is integrally formed of a resin material having translucency such as polycarbonate. The cover 19 includes a cover portion 37 that faces the front surface of the light emitting module 16, and a side wall portion 38 that is provided in the peripheral portion of the cover portion 37 and covers the peripheral portion of the light emitting module 16.

  The cover portion 37 is formed in a substantially square flat plate like the substrate 22, and a wiring cover portion 39 that faces the wiring groove 26 of the substrate 22 and bulges outside the cover portion 37 is formed at one corner portion. Has been.

  The cover portion 37 is formed with a plurality of fixing portions 41 for fixing the cover 19 to the radiator 18 with a plurality of screws 40. The fixing portion 41 is cylindrical, protrudes from the inner surface of the cover portion 37, has a contact portion 42 that contacts the substrate 22 at the tip, and a protrusion 43 that fits into the hole 22c of the substrate 22. A mounting hole 44 through which the screw 40 is inserted is formed at the center of the protrusion 43. Then, the cover 19 and the substrate 22 are positioned by fitting the protrusion 43 with the hole 22c of the substrate 22, and the screw 40 is screwed from the fixing portion 41 to the fixing hole 18a of the radiator 18 to fix the fixing portion 41. The cover 19 is fixed to the radiator 18 in such a state that the inner part of the substrate 22 is pressed against the radiator 18 by the (contact portion 42).

  The side wall portion 38 is provided over the entire circumference of the peripheral portion of the cover portion 37. A fitting portion 45 that fits the outer peripheral portion of the substrate 22 and a fitting portion 46 that fits the outer peripheral portion of the insulating sheet 17 are formed on the distal end side of the side wall portion 38. The side wall portion 38 is provided with a pressing portion 47 that presses the outer peripheral portion of the substrate 22 fitted to the fitting portion 45 to the radiator 18 by the cover 19 being fastened and fixed to the radiator 18 by screws 40. . In the portion of the wiring cover portion 39, the side wall portion 38 bulges outward, and inside the portion of the side wall portion 38, a fitting space 45, 46, etc. is not provided, and a wiring space 48 is formed. A wiring groove 49 communicating with the wiring space 48 is formed in the side wall portion 38.

  Further, the cover portion 37 is integrally formed with a plurality of lens portions 51 that control the light distribution of the light incident from each light emitting element 23. The lens portion 51 protrudes in a mountain shape or a conical shape from the inner surface of the cover portion 37 so as to face each light emitting element 23, and a concave portion 52 facing the light emitting element 23 is formed on the top portion thereof. The inner surface of the recess 52 is formed on the incident surface 53 on which the light from the light emitting element 23 is incident, and the outer surface of the lens unit 51 is formed on the reflecting surface 54 that totally reflects the light incident from the incident surface 53 forward, The front surface of the cover part 37 is formed on the emission surface 55.

  Next, as shown in FIGS. 1 to 3, the housing 12 includes a chassis 58 that fixes the lighting unit 11, a front frame 59 that covers a front peripheral portion of the lighting unit 11, and an angle that supports the chassis 58 on a ceiling or the like. Has 60.

  The chassis 58 includes an upper surface portion 61 and a side surface portion 62 that is bent downward from both sides of the upper surface portion 61. A wiring hole 58a through which the feeder line passes is formed in the center of the upper surface portion 61, and a plurality of mounting holes 58b are formed in the side surface portion 62 corresponding to the positions of the fixing holes 18c of the radiator 18.

  The front frame 59 is formed in a quadrangular frame shape, and includes a front surface portion 63 and a side surface portion 64 provided around the front surface portion 63. The side surface portion 64 is formed with a plurality of mounting holes 59a through which screws 65 for fixing the chassis 58, the front frame 59, and the radiator 18 are inserted. Then, by screwing the screws 65 from the mounting holes 59a of the front frame 59 to the fixing holes 18c of the radiator 18 through the mounting holes 58b of the chassis 58, the radiator 18, the chassis 58 and the front frame 59 are fixed integrally. The front frame 59 covers the side surfaces of the light emitting module 16 and the cover 19, and the front frame 59 projects forward from the front surface of the cover 19.

  The angle 60 is attached to a ceiling or the like, and a chassis 58 is attached so that the angle can be adjusted in order to adjust the light irradiation direction of the illumination unit 11.

  Next, the power supply device 13 is accommodated in the power supply box 68 and installed on the upper surface of the chassis 58. The power supply device 13 receives AC power from the outside through a power line, converts it to predetermined DC power, and supplies it to each light emitting module 16. A power supply line with a connector is used to supply DC power to each light emitting module 16, and this power supply line is electrically connected to the connector 24 of each light emitting module 16 through the wiring hole 58a of the chassis 58 and the wiring hole 18b of the radiator 18. Connected.

  In order to assemble the lighting fixture 10, first, the insulating sheet 17 and the light emitting module 16 are sequentially arranged in the radiator 18, and the power supply line 13 drawn out from the wiring hole 18a of the radiator 18 is connected to the connector of the light emitting module 16. 24, the cover 19 is attached to the light emitting module 16, the screw 40 is screwed from the fixing portion 41 of the cover 19 to the radiator 18, and the lighting unit 11 is assembled. In addition, for example, the power supply line 13 of the power supply device 13 drawn out from the wiring hole 18a of the radiator 18 is connected to the connector 24 of the light emitting module 16, and the light emitting module 16, the insulating sheet 17, and the cover 19 are combined. The illumination unit 11 may be assembled in any order by arranging the screw 40 on the radiator 18 and screwing the screw 40 from the fixing portion 41 of the cover 19 to the radiator 18.

  In the assembled state of the lighting unit 11, the cover 19 is fastened and fixed to the radiator 18 with the screw 40, thereby pressing the inner portion of the substrate 22 against the radiator 18 with the fixing portion 41 of the cover 19 and the pressing portion of the cover 19. At 47, the outer peripheral portion of the substrate 22 is pressed against the radiator 18, and the entire contact surface 22 b of the substrate 22 is in close contact with the radiator 18.

  Further, the cover 19 covers the entirety of the light emitting module 16 including the front surface and side surfaces between the radiator 18 and the heat sink 18.

  Further, the protrusion 43 provided on the fixing portion 41 of the cover 19 is fitted into the hole 22c of the substrate 22, and the outer peripheral portion of the substrate 22 is fitted to the fitting portion 45 of the cover 19, so that the cover 19 and the substrate are fitted. And 22 are positioned. Therefore, each lens part 51 of the cover 19 and each light emitting element 23 are positioned.

  In addition, the power supply line drawn out from the wiring hole 18b of the radiator 18 enters the wiring space 48 in the cover 19 through the wiring groove 49 provided in the wiring cover portion 39 of the cover 19, and is connected to the connector 24. Yes. Since the cover 19 has the wiring cover portion 39, the power supply line is connected to the connector 24 without applying an excessive load to the power supply line.

  Then, by supplying DC power from the power supply device 13 to the light emitting element 23, the light emitting element 23 emits light, the light enters the incident surface 53 of the lens unit 51, and the lens unit 51 controls the light distribution to a predetermined level. Light is emitted from the emission surface 55, that is, the lower surface of the cover 19, into the illumination space.

  At this time, since the lens portion 51 is formed integrally with the cover 19, the light from the light emitting element 23 is transmitted through only the lens portion 51 and is emitted to the illumination space. The transmission loss of light can be reduced compared with the case where each of the light is transmitted.

  Furthermore, the heat generated by the light emitting element 23 during light emission is transmitted from the substrate 22 to the radiator 18 and is radiated from the radiation fin portion 30 of the radiator 18 into the air.

  At this time, since the entire contact surface 22b of the substrate 22 is in close contact with the radiator 18 by the fixing portion 41 and the pressing portion 47 of the cover 19, the thermal conductivity from the substrate 22 to the radiator 18 is good, and the light emitting element 23 Therefore, the excessive temperature rise of the light emitting element 23 can be suppressed, and the light emission efficiency of the light emitting element 23 can be kept high.

  Thus, according to the luminaire 10, the light transmission loss can be reduced, and the light emission efficiency of the light emitting element 23 can be kept high, whereby the light output efficiency can be improved.

  Further, since the cover 19 includes the side wall portion 38 together with the cover portion 37, the peripheral portion of the light emitting module 16 can be covered, and thereby the entire light emitting module 16 can be covered with the cover 19.

  Further, since the connection direction A of the power supply line to the connector 24 of the light emitting module 16 is parallel along one side of the substrate 22, the connection direction A of the power supply line to the connector 24 is arranged when the light emitting module 16 is disposed on the radiator 18. Can be directed to the wiring hole 18b from which the power supply line is drawn out from the radiator 18, and the wiring process of the power supply line to the connector 24 can be facilitated.

  Further, since the front frame 59 covers the periphery of the cover 19 and protrudes forward from the front surface of the cover 19, the cover 19 can be prevented from hitting an object when the lighting fixture 10 is installed, and the cover 19 is protected. be able to.

  In addition, since the radiator 18 is integrally formed by extrusion molding, the heat radiator 18 is highly manufacturable, and the heat dissipation performance of the radiator 18 can be improved as compared with the case of being integrally formed by die casting. .

  Further, the radiator 18 is provided with a screwing portion for attachment to the housing 12, but if the screwing portion is provided on the side portion in the pushing direction P of the main body portion 29, the thickness of the main body portion 29 is increased. This increases the mass and material costs. On the other hand, in this embodiment, since the attachment portion 31 is provided on the side portion in the direction orthogonal to the extrusion direction P of the main body portion 29, it is not necessary to increase the thickness of the main body portion 29, and the weight can be reduced. The material cost can also be reduced.

  Further, since the radiator 18 has a mounting portion 31 attached to the casing 12 on a side portion orthogonal to the extrusion direction P, the casing 12 is orthogonal to the extrusion direction P of the radiator 18. It is only necessary to provide a mounting structure with the radiator 18 only on the side surface in the direction in which the radiator 18 is disposed, and the side surface in the extrusion direction P of the radiator 18 can be opened. Therefore, the air flow with respect to the radiation fin part 30 is ensured from the side surface in the extrusion direction P of the radiation fin part 30, and the heat radiation performance of the radiator 18 can be improved.

  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.

10 Lighting equipment
16 Light emitting module
18 radiator
19 Cover
22 Board
23 Light emitting element
24 connectors
37 Cover
38 Side wall
41 Fixed part
47 Pushing part
51 Lens section
59 Front frame

Claims (4)

With a radiator;
A light emitting module having a substrate and a plurality of light emitting elements mounted on the substrate, and disposed in the radiator;
A cover portion that covers the light emitting module, a plurality of lens portions that are integrally provided on the cover portion so as to face the light emitting element, an inner portion of the substrate that is provided on the cover portion and is screwed to the radiator A cover having a fixing part that presses the radiator against the radiator, and a pressing part that presses the outer peripheral part of the substrate against the radiator;
The lighting fixture characterized by comprising. The lighting device according to claim 1, wherein the cover has a side wall portion covering a peripheral portion of the light emitting module at a peripheral portion of the cover portion. The lighting apparatus according to claim 1, wherein the light emitting module includes a connector mounted on the substrate, and a connection direction to the connector is parallel to one side of the substrate. The lighting fixture according to claim 1, further comprising a front frame that covers the periphery of the cover and protrudes forward from the front surface of the cover.

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