CN204879790U - Lighting installation - Google Patents

Abstract

The utility model provides a lighting appliance with good manufacturability of a heat sink and improved heat dissipation performance. A lighting fixture (10) includes a housing (12), a light emitting module (16), and a radiator (18). The light emitting module (16) has a substrate (22) and a plurality of light emitting elements (23) mounted on the substrate (22). The heat sink (18) is integrally formed by extrusion molding in such a manner that the cross section in the extrusion direction is the same. The heat sink (18) has: a main body (29) for installing the light-emitting module (16), a plurality of fins (30) arranged in a direction perpendicular to the extruding direction and protruding from the main body (29), A mounting portion (31) provided on the side portion of the main body portion (29) in a direction perpendicular to the extrusion direction and mounted to the frame body (12).

Description

lighting equipment

technical field

The embodiment of the utility model relates to a lighting fixture using a radiator.

Background technique

In the past, for example, in lighting fixtures such as high ceilings, when using a light-emitting module with a plurality of light-emitting elements mounted on a substrate, the light-emitting module is mounted on a heat sink in order to effectively dissipate the heat generated by the light-emitting elements. superior.

In addition, the heat sink includes a main body for mounting the light emitting module and a plurality of cooling fins protruding from the main body.

In this type of heat sink, the main body and the plurality of cooling fins are formed separately, and the cooling fins are respectively crimped into the plurality of grooves provided on the main body. Man-hours are required to manufacture a heat sink of this structure.

In addition, there is also a heat sink in which the main body and fins are integrally formed by die-casting. However, the heat dissipation performance of the heat sink formed by die-casting is lower than that of a non-die-casting combination of the main body and fins. The cooling performance of the radiator.

Patent Document 1: Japanese Patent Laid-Open No. 2013-201080

Contents of the invention

The technical problem to be solved by the utility model is to provide a lighting fixture with good manufacturability of the radiator and improved heat dissipation performance.

A lighting fixture according to an embodiment includes a housing, a light emitting module, and a heat sink. The light emitting module has a substrate and a plurality of light emitting elements mounted on the substrate. The heat sink is integrally formed by extrusion molding in such a way that the section in the extrusion direction is the same. The heat sink has: a main body for mounting the light emitting module, a plurality of fins arranged in a direction perpendicular to the extrusion direction and protruding from the main body, The side part is installed on the mounting part of the frame.

According to the present invention, it can be expected that the manufacturability of the heat sink is good, and the heat radiation performance can be improved.

Description of drawings

FIG. 1 is a cross-sectional view showing a lighting fixture according to an embodiment.

Fig. 2 is a perspective view of the above lighting fixture.

Fig. 3 is a perspective view showing an exploded state of the lighting fixture.

Fig. 4 is a perspective view showing a heat sink, a light emitting module, and a cover of the lighting fixture.

Fig. 5 is a perspective view showing a cover of the lighting fixture.

In the figure: 10-lighting device; 12-frame body; 16-light-emitting module; 18-radiator; 22-substrate; 23-light-emitting element; 29-main body; Extrusion direction.

Detailed ways

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

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

The lighting fixture 10 includes a lighting unit 11 , a housing 12 on which the lighting unit 11 is attached, and a power supply device 13 that supplies electric 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 plates 17 , a heat sink 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 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 component mounting surface 22 a , and the other surface is a contact surface 22 b that contacts the heat sink 18 . Substrate 22 is based on metal such as aluminum, for example, and an insulating layer is formed on one surface of the metal base, and a wiring pattern is formed on the insulating layer, and a light emitting element 23, a connector 24, and a capacitor 25 are mounted on the wiring pattern. . The substrate 22 is formed in a substantially square shape, and a wiring groove 26 is provided at one corner. A plurality of hole portions 22 c are provided on the inner side of the substrate 22 . In this embodiment, two holes 22c are provided, one hole 22c is arranged near the wiring groove 26, and the other hole 22c is arranged near the corner of the substrate 22 on the side opposite to the wiring groove 26. .

The light emitting elements 23 use, for example, SMD (Surface Mount Device, Surface Mount Device) LEDs, and are arranged at predetermined intervals over the entire area of one surface of the substrate 22 . In addition, when using an LED, a COB (Chip On Board, chip on board) module may be used as the light emitting module 16 . In addition, an EL (ElectroLuminescence, electroluminescent) element or the like may be used as the light emitting element 23 .

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

Moreover, the plurality of light emitting modules 16 are formed in the same structure. In this embodiment, four light emitting modules 16 are used, and the four light emitting modules 16 are arranged in a rectangular shape so that the wiring grooves 26 of the substrate 22 face each other and are arranged on the heat sink 18 .

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

And, as shown in FIGS. 1 to 4 , the heat sink 18 includes: a main body portion 29 , a plurality of fin portions 30 protruding upward from the upper surface of the main body portion 29 , and disposed on one side of the main body portion 29 and one direction respectively. The mounting portions 31 on both sides in the orthogonal direction.

The heat sink 18 is integrally formed by extrusion molding using a metal material such as aluminum, for example. Therefore, the heat sink 18 is formed such that its cross-sectional shape is the same along one direction, that is, the pressing direction P (see FIG. 3 and FIG. 4 ).

The main body portion 29 is formed in a substantially square shape and has a thickness greater than that of the fin portion 30 . A flat mounting surface 32 on which the light emitting module 16 is mounted is formed on the lower surface of the main body portion 29 . Mounting positions 33 for mounting four light emitting modules 16 are respectively provided at four positions corresponding to the four corners of the mounting surface 32 . Fixing holes 18 a are respectively penetratingly formed at positions coaxial with the hole portions 22 c of the respective substrates 22 in the mounting positions 33 . In the center of the mounting surface 32 and between the four mounting positions 33, a wiring hole 18b for passing a power supply line is formed.

The plurality of cooling fins 30 are disposed at predetermined intervals from each other and parallel to each other in the pressing direction P. As shown in FIG. The heat sink 30 is formed to be thinner than the thickness of the main body portion 29 . The heat sink 30 is disposed above each installation position 33 . Between the mounting positions 33 adjacent in the direction perpendicular to the extrusion direction P, no heat sink 30 is provided, and a space portion 34 communicating with the wiring hole 18 b is formed.

The mounting portion 31 protrudes upward from both side portions in the direction perpendicular to the pressing direction P of the main body portion 29 . A plurality of fixing holes 18c having an axial direction parallel to the mounting surface 32 (horizontal direction) are formed through the mounting portion 31 .

In addition, as shown in FIGS. 1 to 5 , the cover 19 is integrally formed of, for example, a translucent resin material such as polycarbonate. The cover 19 includes a cover portion 37 facing the front surface of the light emitting module 16 , and a side wall portion 38 provided on the peripheral portion of the cover portion 37 and covering the peripheral portion of the light emitting module 16 .

The cover portion 37 is formed in the same substantially square flat plate shape as the substrate 22 , and a wiring cover portion 39 facing the wiring groove 26 of the substrate 22 and protruding outward from the cover portion 37 is formed at one corner.

A plurality of fixing portions 41 for fixing the cover 19 to the heat sink 18 with a plurality of screws 40 are formed on the cover portion 37 . The fixed portion 41 is cylindrical, protrudes from the inner surface of the cover portion 37 , and has a contact portion 42 at the front end that contacts the substrate 22 and a protruding portion 43 that fits into the hole 22 c of the substrate 22 . A mounting hole 44 through which the screw 40 is inserted is formed at the center of the protruding portion 43 . And, the cover 19 and the base plate 22 are positioned by the fitting of the protruding portion 43 and the hole portion 22c of the base plate 22, and the cover 19 is used by screwing the screw 40 from the fixing portion 41 to the fixing hole 18a of the radiator 18. The fixing portion 41 (contact portion 42 ) is fixed to the heat sink 18 in a state where the inner portion of the substrate 22 is pressed against the heat sink 18 .

The side wall portion 38 is provided over the entire periphery of the peripheral portion of the cover portion 37 . A fitting portion 45 for fitting the outer peripheral portion of the substrate 22 and a fitting portion 46 for fitting the outer peripheral portion of the insulating plate 17 are formed on the front end side of the side wall portion 38 . A pressing portion 47 is formed on the side wall portion 38 for pressing the outer peripheral portion of the substrate 22 fitted into the fitting portion 45 against the heat sink 18 in a state where the cover 19 is fastened to the heat sink 18 with the screws 40 . . The side wall part 38 bulges outward at the part of the wiring cover part 39, and the fitting part 45, 46 etc. are not formed in the inside of this side wall part 38 part, but the wiring space 48 is formed, and on this side A wiring groove 49 communicating with the wiring space 48 is formed on the wall portion 38 .

Furthermore, a plurality of lens units 51 for controlling light distribution of light incident from each light emitting element 23 are integrally formed on the cover unit 37 . The lens portion 51 faces each light emitting element 23 and protrudes from the inner surface of the cover portion 37 in a mountain or conical shape, and a concave portion 52 facing the light emitting element 23 is formed on the top of the lens portion 51 . The inner surface of the concave portion 52 becomes the incident surface 53 where the light from the light emitting element 23 enters, the outer surface of the lens portion 51 becomes the reflective surface 54 that totally reflects the light incident from the incident surface 53 forward, and the front surface of the cover portion 37 becomes the light emitting surface. Face 55.

Next, as shown in FIGS. 1 to 3 , the frame body 12 includes a base frame 58 for fixing the lighting unit 11, a front frame 59 covering the front peripheral portion of the lighting unit 11, and a frame for supporting the base frame 58 on a ceiling or the like. Angle iron 60.

The chassis 58 includes an upper surface 61 and side surfaces 62 bent downward from both sides of the upper surface 61 . A wiring hole 58 a through which a power supply line is inserted is formed at the center of the upper surface 61 , and a plurality of mounting holes 58 b are formed at positions corresponding to the fixing holes 18 c of the heat sink 18 on the side surface 62 .

The front frame 59 is formed in a rectangular frame shape, and includes a front portion 63 and a side portion 64 provided on a peripheral portion of the front portion 63 . A plurality of mounting holes 59 a through which screws 65 for fixing the bottom frame 58 , the front frame 59 , and the heat sink 18 are inserted are formed in the side portion 64 . And, by passing the screw 65 from the mounting hole 59a of the front frame 59 through the mounting hole 58b of the bottom frame 58 and screwing it into the fixing hole 18c of the radiator 18, the radiator 18, the bottom frame 58, and the front frame 59 are fixed integrally. , and the side surfaces of the light emitting module 16 and the cover 19 are covered by the front frame 59 , and the front frame 59 protrudes forward more than the front surface of the cover 19 .

The angle iron 60 is attached to a ceiling or the like, and the bottom frame 58 is attached so as to be adjustable in angle in order to adjust the light irradiation direction of the lighting unit 11 .

Next, the power supply device 13 is accommodated in the power supply box 68 and is installed on the upper surface of the chassis 58 . The power supply unit 13 receives AC power from the outside through a power cord, converts the AC power into predetermined DC power, and supplies it to each light emitting module 16 . When DC power is supplied to each light-emitting module 16, a power supply line with a connector is used. 24 electrical connections.

In addition, when assembling the lighting fixture 10, first, after disposing the insulating plate 17 and the light emitting module 16 on the heat sink 18 in order, connect the power supply line of the power supply device 13 drawn out from the wiring hole 18a of the heat sink 18 to the light emitting module 16. Then, the cover 19 is covered on the light emitting module 16, and the screw 40 is threaded and fixed to the heat sink 18 from the fixing portion 41 of the cover 19, thereby assembling the lighting unit 11. In addition, the lighting unit 11 can be assembled in any order. For example, the power supply line of the power supply device 13 drawn from the wiring hole 18a of the radiator 18 can also be connected to the connector 24 of the light emitting module 16, and then the light emitting module 16, insulated After the plate 17 and the cover 19 are assembled and the assembly is arranged on the heat sink 18 , screws 40 are screwed and fixed to the heat sink 18 from the fixing portion 41 of the cover 19 .

In the state where the lighting unit 11 has been assembled, since the cover 19 is fastened to the heat sink 18 with the screws 40, the inner side of the substrate 22 is pressed against the heat sink 18 by the fixing portion 41 of the cover 19, and the pressing force of the cover 19 The portion 47 presses the outer peripheral portion of the substrate 22 against the heat sink 18 so that the entire contact surface 22 b of the substrate 22 is in close contact with the heat sink 18 .

Furthermore, the cover 19 covers the entire light-emitting module 16 including the front and side surfaces between it and the heat sink 18 .

And, by fitting the protruding portion 43 provided on the fixing portion 41 of the cover 19 into the hole portion 22c of the substrate 22, and fitting the outer peripheral portion of the substrate 22 into the fitting portion 45 of the cover 19, the cover 19 and the substrate 22 positioning. Accordingly, each lens portion 51 and each light emitting element 23 of the cover 19 are positioned.

In addition, the power supply wire drawn out from the wiring hole 18 b of the heat sink 18 enters the wiring space 48 inside the cover 19 through the wiring groove 49 provided in the wiring cover part 39 of the cover 19 , and is connected to the connector 24 . Since the cover 19 has the wiring cover portion 39, the power supply line can be connected to the connector 24 without receiving an excessive load.

And, by supplying DC power to the light-emitting element 23 from the power supply device 13, the light-emitting element 23 is able to emit light, the light is incident on the incident surface 53 of the lens portion 51, and is emitted from the lower surface of the cover 19 from the emission surface 55 to the lighting space by the lens portion 51. Light controlled to a predetermined light distribution.

At this time, since the lens part 51 and the cover 19 are integrally formed, the light from the light emitting element 23 is emitted to the lighting space only through the lens part 51. Therefore, compared with the case where the light passes through separate lenses and covers separately, it can Reduce light transmission loss.

Then, the heat generated by the light emitting element 23 when emitting light is transferred from the substrate 22 to the heat sink 18 , and is dissipated into the air from the fin portion 30 of the heat sink 18 .

At this time, since the entire contact surface 22b of the substrate 22 is in close contact with the heat sink 18 by the fixing portion 41 and the pressing portion 47 of the cover 19, the thermal conductivity from the substrate 22 to the heat sink 18 is good, and the heat dissipation performance of the light emitting element 23 is improved. Therefore, it is possible to suppress an excessive rise in the temperature of the light emitting element 23 and to keep the luminous efficiency of the light emitting element 23 high.

In this way, according to the lighting fixture 10 , since the transmission loss of light can be reduced and the light emitting efficiency of the light emitting element 23 can be kept high, the efficiency of light output can be improved.

Furthermore, since the cover 19 includes the cover portion 37 and the side wall portion 38 , it can cover the peripheral portion of the light emitting module 16 , whereby the entire light emitting module 16 can be covered by the cover 19 .

Moreover, since the connection direction A of the power supply line with respect to the connector 24 of the optical module 16 is parallel to one side of the substrate 22, when the light emitting module 16 is arranged on the heat sink 18, the direction A of the power supply line with respect to the connector 24 can be adjusted. The connection direction A faces the wiring hole 18b through which the power supply line is drawn out from the heat sink 18, so that the wiring process of the power supply line to the connector 24 can be easily performed.

Furthermore, since the front frame 59 covers the periphery of the cover 19 and protrudes forward from the front surface of the cover 19 , when the lighting fixture 10 is installed, the cover 19 can be prevented from being touched by objects and the cover 19 can be protected.

In addition, since the heat sink 18 is integrally formed by extrusion molding, the manufacturability of the heat sink 18 is good, and the heat dissipation performance of the heat sink 18 can be improved compared with the case of integrally forming by die-casting.

In addition, although the radiator 18 may be provided with a screw fixing portion for being mounted on the frame body 12, if the screw fixing portion is provided on the side of the extrusion direction P of the main body portion 29, the thickness of the main body portion 29 needs to be thickened. Consequently, the mass increases, leading to an increase in material cost. On the contrary, in this embodiment, since the mounting portion 31 is provided on the side portion of the main body portion 29 in the direction perpendicular to the pressing direction P, it is not necessary to increase the thickness of the main body portion 29, thereby reducing weight and enabling Reduce material costs.

Moreover, in the heat sink 18, since the side portion in the direction perpendicular to the extruding direction P has the mounting portion 31 mounted on the frame body 12, the frame body 12 only needs to be aligned with the extruding direction P of the heat sink 18. It is only necessary to have a mounting structure for the heat sink 18 on the side surface in the orthogonal direction, and the side surface in the extrusion direction P of the heat sink 18 can be opened. Therefore, the air flow with respect to the fin part 30 can be ensured from the side surface in the extrusion direction P of the fin part 30, and the heat dissipation performance of the heat sink 18 can be improved.

As mentioned above, although some embodiment of this invention was illustrated, these embodiment is only an illustration, and is not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the gist of the present invention. These embodiments and their modifications all belong to the scope or gist of the present invention, and are also included in the utility model described in the technical solution and its equivalent scope.

Claims (1)

1. A lighting fixture, characterized in that it has: framework; A light-emitting module, which has a substrate and a plurality of light-emitting elements mounted on the substrate; a heat sink integrally formed by extrusion molding in such a manner that the cross-section in the extrusion direction is the same, and having a main body portion for mounting the light emitting module, arranged in a direction orthogonal to the extrusion direction and extending from the A plurality of fin portions protruding from the main body are provided on side portions of the main body in a direction perpendicular to the extruding direction and are attached to a mounting portion of the frame.