CN204313259U - Lighting device - Google Patents

Abstract

The utility model provides an illuminating device capable of suppressing the height of a radiator and ensuring heat dissipation. A lighting device (10) includes a light emitting unit (33), a radiator (22), and a power supply unit (26). The radiator (22) has: a setting part (37) in which a light-emitting part (33) is provided at the lower part, a first cooling fin part (38) protruding upward from the setting part (37), and a The upper portion protrudes laterally from the second fin portion (39). The power supply unit (26) supplies electric power to the light emitting unit (33).

Description

lighting device

technical field

Embodiments of the present invention relate to a lighting device including a radiator that dissipates heat generated by a light emitting unit.

Background technique

Conventionally, an illuminating device including a light emitting unit using a light emitting element such as an LED includes a radiator in order to efficiently dissipate heat generated by the light emitting unit.

In such an illuminating device, in order to cope with higher output of the light emitting unit, it is necessary to improve the heat dissipation performance of the heat sink, and thus the heat sink tends to increase in size.

When the lighting device is a downlight embedded in the ceiling, the radial size of the radiator is limited due to the influence of the embedded opening of the ceiling member, so the radiator must be enlarged in the height direction.

However, if the radiator is enlarged in the height direction, depending on the ceiling structure, the upper part of the radiator may interfere with other structures and the like, which may hinder the installation of the lighting device.

Patent Document 1: Japanese Unexamined Patent Publication No. 2013-182734.

Contents of the invention

The problem to be solved by the present invention is to provide a lighting device capable of suppressing the height of the radiator and ensuring heat dissipation.

A lighting device according to an embodiment includes a light emitting unit, a radiator, and a power supply unit. The heat sink has an installation portion on which the light emitting unit is provided at the lower portion, a first heat dissipation fin portion protruding upward from the installation portion, and a second heat dissipation fin portion protruding sideways from an upper portion of the first heat dissipation fin portion. The power supply unit supplies power to the light emitting unit.

According to the present invention, the height of the radiator can be suppressed, and the heat dissipation of the radiator can be expected to be ensured.

Description of drawings

FIG. 1 is a cross-sectional view showing a lighting device according to a first embodiment.

Fig. 2 is a perspective view of the lighting device as viewed from above.

Fig. 3 is a perspective view of the lighting device seen from below.

Fig. 4 is a side view of the above lighting device.

Fig. 5 is a side view showing a lighting device according to a second embodiment.

In the figure: 10-illumination device, 22-radiating body, 26-power supply unit, 33-light-emitting part, 37-installation part, 38-first heat sink part, 39-second heat sink part.

Detailed ways

Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 4 .

The lighting device 10 is a recessed lighting device. Downlights are used as recessed lighting devices. The lighting device 10 is embedded in a circular opening 12 opened in the ceiling member 11 . In addition, the thickness of the ceiling member 11 is about 5-25 mm.

The lighting device 10 includes a lamp device 20 and a fixture 21 in which the lamp device 20 is arranged. Furthermore, the lighting device 10 includes a radiator 22 and a decorative frame 23 constituting a fixture 21 , and further includes a socket 24 , a reflector 25 , and a power supply unit 26 arranged on the radiator 22 .

In addition, the lamp device 20 includes: a frame body 28, a heat dissipation member 29 made of metal mounted on the upper portion of the frame body 28, a light emitting module 30 mounted on the lower surface of the heat radiation member 29, and a light emitting module 30 that is covered and mounted. The transparent cover 31 under the frame body 28. The upper side of the frame body 28 constitutes a base detachably attached to the socket 24 .

The light emitting module 30 includes a substrate 32 and a light emitting portion 33 formed on the substrate 32 . The light emitting unit 33 includes a plurality of light emitting elements mounted on the substrate 32 . The light emitting unit 33 can use a COB (Chip On Board, chip on board) module and an SMD (Surface Mount Device, surface mount device) package using LED as a light emitting element, or other light emitting elements such as an EL element can also be used.

Furthermore, the appliance 21 includes a radiator 22 as a appliance main body, and a decorative frame 23 attached to a lower portion of the radiator 22 .

Also, the radiator 22 is made of metal material. Die-cast aluminum is used, for example, as the metal material.

The radiator 22 has a disk-shaped base 36 . The diameter of the base portion 36 is formed smaller than the inner diameter of the opening portion 12 of the ceiling member 11 . A planar installation portion 37 on which the lamp device 20 is installed is formed on the lower surface of the base portion 36 . In addition, since the lamp device 20 installed in the installation part 37 includes the light emitting part 33 , it can be considered that the light emitting part 33 is provided in the installation part 37 .

The radiator 22 includes a plurality of first fin portions 38 protruding upward from the upper surface of the base portion 36 , and a plurality of second fin portions 39 protruding laterally from the upper portion of the side surface 38 a of the first fin portion 38 . . Although the first heat sink part 38 and the second heat sink part 39 are integrally formed, they may be separated as long as they are thermally connected.

The first fin portions 38 are formed parallel to each other with a gap 40 therebetween in the width direction (parallel direction). A connecting portion 41 protruding from the base portion 36 and integrally connecting the plurality of first fin portions 38 is formed at the central portion of the first fin portion 38 . The periphery of the first fin portion 38 is located in the upper region of the base portion 36 and is formed smaller than the inner diameter of the opening portion 12 of the ceiling member 11 . The upper surface of the first fin portion 38 is formed horizontally. A relief portion 42 is formed on the upper portion of the first fin portion 38 in a shape in which a corner portion opposite to the protruding direction of the second fin portion 39 is obliquely cut. The escape portion 42 may be linear or curved.

The second fin portions 39 are formed to be parallel to each other with a gap 43 therebetween in the width direction (parallel direction). The second fin portion 39 is provided continuously to the first fin portion 38 and linearly parallel to the first fin portion 38 . The upper surface of the second fin portion 39 is continuous and horizontal to the upper surface of the first fin portion 38 . The lower surface 39a of the second fin portion 39 is formed such that the front ends of the second fin portions 39 on both sides are inclined upward relative to the second fin portion 39 on the central side. The position of the lower surface 39a of the second heat sink portion 39 is set so as not to interfere with the mounting spring 48 when the lighting device 10 is installed so that the mounting spring 48 described later follows the reflector. The vertical and widthwise dimensions of the second fin portion 39 are formed smaller than the inner diameter of the opening portion 12 of the ceiling member 11 .

Furthermore, the decorative frame 23 has a cylindrical decorative frame main body 46 . The outer diameter of the decorative frame main body 46 is formed smaller than the inner diameter of the opening 12 of the ceiling member 11 . A flange 47 is formed on the lower portion of the decorative frame 23 , and the flange 47 contacts the lower surface of the ceiling member 11 to cover the opening 12 when the lighting device 10 is installed. A plurality of mounting springs 48 for mounting on the ceiling are mounted around the decorative frame 23 . In this embodiment, three mounting springs 48 are used, and one mounting spring 48 is arranged below the second heat sink portion 39 .

Furthermore, the socket 24 is attached to the installation part 37 of the radiator 22 . The base of the lamp device 20 is detachably attached to the lamp socket 24 . An insertion hole 51 through which the heat dissipation member 29 of the lamp device 20 is inserted is formed in the center of the socket 24 . Then, when the lamp device 20 is attached to the lamp socket 24 , the heat dissipation member 29 inserted through the insertion hole 51 contacts the installation portion 37 of the heat dissipation body 22 to thermally connect the heat dissipation member 29 and the heat dissipation body 22 . Furthermore, when the lamp device 20 is attached to the lamp socket 24 , the lamp socket 24 and the lamp device 20 are electrically connected, and the DC power output from the power supply unit 26 can be supplied to the light emitting module 30 of the lamp device 20 .

In addition, the reflector 25 is detachably mounted in the decorative frame 23 through the mounting fitting provided on the radiator 22 . The reflector 25 is formed in a cylindrical shape expanding downward.

Furthermore, the power supply unit 26 includes an elongated casing 54 and a power supply circuit 55 accommodated in the casing 54 . The case 54 includes a top plate 56 and a case main body 57 attached to the lower surface of the top plate 56 . In addition, the dimension in the direction intersecting the longitudinal direction of the power supply unit 26 is formed to be smaller than the inner diameter of the opening 12 of the ceiling member 11 .

Side plates 58 bent downward are formed on both sides of the top plate 56 , and one end of the side plate 58 is attached to the upper portion of the radiator 22 via a mounting member 59 . The attachment member 59 is attached to an upper portion on the front end side of the second fin portion 39 . Both side plates 58 of the top plate 56 are rotatably connected to both sides of the mounting member 59 via shafts 60 . Therefore, the power supply unit 26 is attached to the front end side of the second fin portion 39 of the radiator 22 . Furthermore, the power supply unit 26 is mounted on the front end side of the second fin portion 39 of the radiator 22 so as to be swingable in the vertical direction around the shaft 60 .

Legs 61 mounted on the upper surface of the ceiling member 11 are formed at the other end of the top plate 56 . The leg portion 61 protrudes downward from the side plate 58 , and an inclined portion 62 is formed between the leg portion 61 and the side plate 58 .

The power supply circuit 55 is configured to input AC power, convert the AC power into a predetermined DC power, and supply it to the light emitting module 30 of the lamp device 20 through the socket 24 .

A terminal block 63 is attached to the front end side of the top plate 56, and the terminal block 63 and the power supply circuit 55 are connected by electric wires.

Next, the operation of this embodiment will be described.

When installing the lighting device 10 , electric wires such as power lines and signal lines disposed above the ceiling member 11 are drawn from the opening 12 to the bottom of the ceiling member 11 and connected to the terminal block 63 of the power supply unit 26 .

Insert the front end of the power supply unit 26 into the opening 12 with the front end of the power supply unit 26 facing upward, and lay down the power supply unit 26 inserted into the opening 12 toward the upper area of the ceiling member 11 .

With the protruding front end side of the second heat sink portion 39 directed upward, the front end side of the second heat sink portion 39 is inserted into the opening 12 following the power supply unit 26 . Thereafter, the radiator 22 (apparatus 21 ) is rotated so that the upper portion of the first fin portion 38 can be inserted into the opening 12 , and the upper portion of the first fin portion 38 is inserted into the opening 12 .

At this time, as shown in FIG. 4 , the lower surface 39 a of the second fin portion 39 or the side surface 38 a of the first fin portion 38 facing the lower surface 39 a of the second fin portion 39 abuts against the opening. The heat sink 22 can be rotated smoothly by using the contact portion as a fulcrum P to rotate the heat sink 22 , and the upper part of the first heat sink portion 38 can be easily inserted into the opening 12 .

In addition, as for the radiator 22 that rotates around the fulcrum P of the edge of the opening 12, if it is accommodated in the imaginary line A that is centered on the fulcrum P and drawn with the diameter of the opening 12, the radiator 22 can be 22 is inserted into the opening 12. The shape of the radiator 22 that can be inserted into the opening 12 can be set by the position of the lower surface 39 a of the second fin portion 39 and the shape of the escape portion 42 of the first fin portion 38 .

Next, in a state where the plurality of mounting springs 48 are elastically deformed to follow the side surfaces of the radiator 22 and the plurality of mounting springs 48 are held, the lower part of the radiator 22 and the front ends of the plurality of mounting springs 48 are inserted into the opening 12. . After the front ends of the plurality of attachment springs 48 are inserted into the opening 12 , the holding of the plurality of attachment springs 48 can be released. The plurality of mounting springs 48 released from holding are elastically expanded outward, and contact the upper edge of the opening 12 of the ceiling member 11 .

Next, the lower portion of the radiator 22 , the plurality of mounting springs 48 , and the decorative frame 23 are inserted into the opening 12 . When it continues to be inserted into the opening part 12, several attachment springs 48 will play the role which pulls up the tool 21 toward the upper direction of the ceiling member 11 by elasticity. As a result, the flange 47 of the decorative frame 23 comes into contact with the lower surface of the ceiling member 11 , and the ceiling member 11 is sandwiched and held between the flange 47 and the plurality of attachment springs 48 .

The power supply unit 26 rotates according to the thickness of the ceiling member 11 , the front end leg portion 61 of the power supply unit 26 is mounted on the upper surface of the ceiling member 11 , and the front end of the power supply unit 26 is supported by the ceiling member 11 .

Next, after the lighting device 10 is installed, DC power is supplied from the power supply unit 26 toward the light emitting module 30 of the lamp device 20, whereby the light emitting part 33 of the light emitting module 30 emits light, and the light from the light emitting part 33 passes through the reflector 25 toward The lighting space below shoots out.

The heat generated when the light emitting portion 33 emits light is transferred from the substrate 32 to the heat dissipation member 29 , and then transferred from the heat dissipation member 29 to the heat dissipation body 22 , thereby dissipating heat from the heat dissipation body 22 to the air.

The heat transferred to the light emitting portion 33 of the radiator 22 is transferred throughout the entire radiator 22 including the first fin portion 38 and the second fin portion 39 .

As shown in Figure 1, since the heat is transferred to the first cooling fin part 38, the air heated by the first cooling fin part 38 rises from the upper side of the first cooling fin part 38, and the air at the ambient temperature before heating rises from the first cooling fin part 38. The lower side of the fin portion 38 flows into the gap 40 of the first fin portion 38 , thereby generating an airflow F1 from below to above via the gap 40 of the first fin portion 38 . The airflow F1 enables more efficient heat dissipation from the first fin portion 38 .

And, because the heat is transferred to the second fin portion 39 , the air heated by the second fin portion 39 rises from the upper side of the second fin portion 39 , and the air at the ambient temperature before heating flows from the second fin portion 39 . The lower side of the lower side flows into the gap 43 of the second fin portion 39 , thereby generating an airflow F2 from below to above through the gap 43 of the second fin portion 39 . This air flow F2 can more effectively dissipate heat from the second fin portion 39 . The second heat sink portion 39 protrudes laterally from the first heat sink portion 38 and has a lower surface 39a, thereby generating an air flow F2 flowing from the lower surface 39a to the upper surface, thereby obtaining a high heat dissipation effect.

Furthermore, since the illuminating device 10 of this embodiment includes the radiator 22 in which the second fin portion 39 protrudes laterally from the upper portion of the first fin portion 38 , the height of the radiator 22 can be suppressed, and it can be ensured that it can handle the lamp. The heat dissipation performance of the radiator 22 for high power of the device 20 .

And, since the first heat dissipation fin portion 38 and the second heat dissipation fin portion 39 are arranged in a straight line and in parallel, the air flow caused by heat dissipation becomes smooth, resulting in better heat dissipation, and the manufacturability of the heat dissipation body 22 becomes easier. good.

Furthermore, since the power supply unit 26 is attached to the front end side of the second fin portion 39 of the radiator 22 , the power supply unit 26 and the radiator 22 can be inserted into the opening 12 of the ceiling member 11 .

And, when the lighting device 10 is detached from the ceiling member 11, the decorative frame 23 is pulled down against the urging force of the multiple mounting springs 48, the multiple mounting springs 48 are taken out from the opening 12 downward, and the second cooling fin portion 39 The radiator 22 can be rotated upward, the radiator 22 can be taken out downward from the opening 12 , and the power supply unit 26 can be taken out downward from the opening 12 . At this time, although the leg portion 61 protrudes downward on the front end side of the power supply unit 26, since the leg portion 61 and the side plate 58 are connected by the inclined portion 62, the leg portion 61 will not be placed on the ceiling member 11. The upper wiring, structures, etc. are caught, and the power supply unit 26 can be easily removed from the opening 12 .

In addition, the position of the lower surface 39 a of the second fin portion 39 is greater than the thickness of the ceiling member 11 from the upper surface of the flange 47 of the decorative frame 23 . In this embodiment, since the mounting spring 48 is used when installing the lighting device 10, the lower surface 39a of the second heat sink portion 39 is positioned so that the mounting spring 48 does not interfere with the mounting spring 48 in a state of following the reflector. The location is fine. In addition, the vertical and width dimensions of the second heat dissipation fin portion 39 need only be smaller than the inner diameter of the opening 12 so that the second heat dissipation portion 39 can be inserted into the opening 12 of the ceiling member 11 .

Next, a second embodiment is shown in FIG. 5 . In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description of the structure and operation effect is abbreviate|omitted.

FIG. 5 shows a slanted ceiling lighting device 10 used for a slanted ceiling member 11 . The inclination angle of the ceiling member 11 is, for example, 20° with respect to the horizontal plane.

The decorative frame 23 includes an upper plate 70 attached to the lower portion of the radiator 22 , a frame portion 71 fitted to the opening 12 of the ceiling member 11 , and a support portion 72 connecting the upper plate 70 and the frame portion 71 . The support portion 72 is provided vertically with respect to the frame portion 71 .

Guide grooves 73 are formed in the support portion 72 along the longitudinal direction (vertical direction) of the support portion 72 . An installation fitting 74 that can slide along the guide groove 73 is mounted on the guide groove 73 of the support portion 72 . The upper portion of the mounting bracket 74 is slidably connected to the guide groove 73 , and the lower portion of the mounting bracket 74 can protrude laterally from the support portion 72 with the upper portion as a fulcrum. Then, after inserting the decorative frame 23 into the opening 12 of the ceiling member 11 together with the power supply unit 26 and the radiator 22, the mounting bracket 74 located above the upper surface of the ceiling member 11 is slid downward, thereby, The lower portion of the mounting bracket 74 protrudes sideways to be caught on the ceiling member 11 , and the upper portion of the mounting bracket 74 is crimped and fixed to the support portion 72 . As a result, the ceiling member 11 is sandwiched and held between the frame portion 71 and the attachment fitting 74 .

The lower portion of the reflector 25 is formed in an inclined shape in accordance with the inclination of the ceiling member 11 so as to be parallel to the frame portion 71 .

In addition, in the lighting device 10 of the ceiling mounting structure using the mounting bracket 74, the position of the lower surface 39a of the second fin portion 39 is not restricted to a position where it does not interfere with the mounting spring 48 like in the first embodiment, and the Since the lower surface 39 a of the second fin portion 39 is located on the lower side of the first fin portion 38 , the second fin portion 39 can be enlarged and the heat dissipation effect can be improved. In addition, in this case, the dimensions of the second fin portion 39 in the vertical direction and the width direction may also be smaller than the inner diameter of the opening portion 12 so that the second fin portion 39 can be inserted into the opening portion of the ceiling member 11. 12.

In addition, the second heat sink portion 39 and the power supply unit 26 of the lighting device 10 are arranged toward the ascending side in the inclination direction of the ceiling member 11 .

Assuming that the second cooling fin portion 39 and the power supply unit 26 are disposed toward the descending side of the inclination direction of the ceiling member 11, the inclination of the power supply unit 26 is large when the front end side of the power supply unit 26 is mounted on the ceiling member 11. The temperature on the upper side of the inclined power supply unit 26 tends to rise, which tends to affect the life of the power supply unit 26 . In order to prevent the above problems, the power supply unit 26 must be made long, which leads to an increase in the size of the power supply unit 26 .

By arranging the second fin portion 39 and the power supply unit 26 toward the rising side of the inclination direction of the ceiling member 11, the inclination of the power supply unit 26 in a state where the front end side of the power supply unit 26 is mounted on the ceiling member 11 is reduced, thereby Variations in the temperature distribution of the power supply unit 26 can be reduced, and the life of the power supply unit 26 can be extended. Furthermore, it is possible to reduce the size of the power supply unit 26 without lengthening the power supply unit 26 .

In addition, in the illuminating device 10 , the light emitting part may be attached to the installation part 37 of the radiator 22 without using the lamp device 20 , the lamp socket 24 , and the like.

As mentioned above, although some embodiment of this invention was demonstrated, these embodiment is an illustration and does not intend 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 (3)

1. A lighting device, characterized in that it has: luminous part; A heat sink comprising: an installation portion on which the light emitting unit is provided at a lower portion, a first heat dissipation fin portion protruding upward from the installation portion, and a second heat dissipation fin portion protruding sideways from an upper portion of the first heat dissipation fin portion. part; A power supply unit that supplies power to the light emitting unit. 2. The lighting device according to claim 1, characterized in that, The power supply unit is mounted on a front end side of the second heat sink portion of the heat sink. 3. The lighting device according to claim 1 or 2, characterized in that, The first heat dissipation fin part and the second heat dissipation fin part are arranged in parallel.