JP2015062159A - Light-emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting device that is high in the degree of freedom for the number of mounted light-emitting units and the arrangement of the light-emitting units, that can easily achieve a change in a luminous flux class or a surface emitted light intensity distribution, that is excellent is heat radiation, that can achieve an appropriate device weight even if the luminous flux class changes, and that can ensure excellent assemblability and low cost.SOLUTION: A light-emitting device 1 of the present invention includes: a frame 3 of a toric shape or a rotation symmetric annular shape; and a light-emitting unit 2 that includes light-emitting elements (LED light sources 21), a radiator (a light source attachment plate 23, a radiation fin attachment plate 24, and radiation fins 25) radiating heat generated by the light-emitting elements to surrounding air; and a frame fixed portion fixed to the frame 3, the light-emitting elements being arranged within a range of a sector having a vertex at a center of the frame 3 and a central angle of 120° or less in a view from a direction of a center line of the frame 3, a plurality of light-emitting units 2 being fixed to the frame 3.

Description

  The present invention relates to a light emitting device.

  As a conventional lighting device using LEDs (Light Emitting Diode), particularly an LED lighting device installed on a high ceiling, a substrate on which a plurality of LED packages each having a relatively small size and a small luminous flux are mounted is combined with one large heat sink (heat radiation). The mainstream is an apparatus configuration that is attached to the body and reduces the temperature of the LED light source by its heat dissipation effect to maintain high luminous efficiency (see, for example, Patent Document 1). Similarly, as another device configuration for the purpose of improving heat dissipation, a configuration in which a plurality of light emitting units each including a heat radiator is mounted on each LED light source has been proposed (see, for example, Patent Document 2). .

JP 2010-262846 A Special table 2008-542882 gazette

  In the configuration as disclosed in Patent Document 1, heat is radiated by one large heat radiating body. Therefore, the heat radiating portion is increased in size and weight as the luminous flux is increased, leading to higher costs. In addition, when trying to support a product with a plurality of luminous flux classes with the specification of one radiator, the specification of the radiator must be a specification corresponding to a product with the largest luminous flux class. In a product with a small luminous flux class that uses this common radiator, the amount of heat generated by the light source is reduced by reducing the number of LEDs or lowering the drive current, so the weight and size of the radiator are excessive. become. For this reason, the weight and size of the product become larger than necessary. On the other hand, when using heat sinks with special specifications according to the luminous flux class of the product, it is necessary to prepare heat sinks with multiple specifications, leading to an increase in the number of parts, leading to high costs and productivity. It gets worse.

  Further, in the configuration as in Patent Document 2, the LED light source and the heat radiating body are configured to dissipate heat as a small package. However, since the number and arrangement positions of the LED light sources are determined in advance, the number adjustment and arrangement thereof are performed. There is a drawback that the position cannot be easily changed. In other words, when it is desired to adjust the luminous flux and surface emission intensity distribution with a certain size device, there is no degree of freedom and each device must be made according to the individual optical requirement specifications. It has become.

  The present invention has been made to solve the above-described problems. The number of light emitting units mounted and the degree of freedom of arrangement are high, and the light flux class or surface light emission intensity distribution can be easily changed with the same apparatus size. An object of the present invention is to provide an inexpensive light-emitting device that is excellent in heat dissipation, can have an appropriate device weight even when the luminous flux class is changed, and is excellent in assemblability.

  A light emitting device according to the present invention includes a frame having an annular shape or a rotationally symmetric ring, a light emitting element, a heat radiator that radiates heat generated by the light emitting element to surrounding air, and a frame that is fixed to the frame. A light-emitting unit in which a light-emitting element is arranged in a fan-shaped range with a center angle of 120 ° or less as viewed from the direction of the center line of the frame. The light emitting unit is fixed to the frame.

  According to the present invention, the number of light emitting units to be mounted and the degree of freedom of arrangement are high, and the light flux class or the surface light emission intensity distribution can be easily changed with the same apparatus size, excellent heat dissipation, and the light flux class can be changed. Even when it is changed, it is possible to provide an appropriate device weight and to provide an inexpensive light emitting device excellent in assemblability.

It is the perspective view which looked at the light-emitting device (state which mounted two light-emitting units) of Embodiment 1 of this invention from diagonally forward. It is the perspective view which looked at the light-emitting device shown in FIG. 1 from diagonally behind. It is the perspective view which expanded a part (near the light emission unit support plate) of FIG. It is the perspective view which looked at the light emission unit with which the light-emitting device of Embodiment 1 of this invention is provided from diagonally forward. It is the disassembled perspective view which looked at the light emission unit with which the light-emitting device of Embodiment 1 of this invention is provided from diagonally forward. It is the perspective view which looked at the light emission unit support plate with which the light-emitting device of Embodiment 1 of this invention is provided from diagonally back. It is the perspective view which looked at the light source attachment board with which the light emission unit of the light emitting device of Embodiment 1 of this invention is provided from diagonally back. It is sectional drawing which shows the light-emitting device of Embodiment 1 of this invention. It is the perspective view which looked at the light-emitting device (state which mounted four light emission units) of Embodiment 1 of this invention from diagonally forward. It is the perspective view which looked at the light-emitting device shown in FIG. 9 from diagonally behind. It is the perspective view which looked at the light-emitting device (state which mounted three light emission units) of Embodiment 1 of this invention from diagonally forward. It is the perspective view which looked at the light-emitting device 1 shown in FIG. 11 from diagonally back. FIG. 11 is a rear view of the light emitting device shown in FIGS. 9 and 10 (where the device support is removed). It is a rear view of the light-emitting device (however, the state which removed the apparatus support body) of Embodiment 2 of this invention. It is a side view of the light-emitting device of Embodiment 3 of this invention. It is a rear view of the light-emitting device (however, the state which removed the apparatus support body) of Embodiment 3 of this invention. It is the perspective view which looked at the heat radiator with which the light emission unit of the light emitting device of Embodiment 3 of this invention is provided from diagonally back. It is the perspective view which looked at the light-emitting device (however, the state which removed one light-emitting unit) of Embodiment 3 of this invention from diagonally back. It is sectional drawing which cut | disconnected the light-emitting device of Embodiment 3 of this invention by the plane containing a centerline. It is a side view of the light-emitting device of Embodiment 4 of this invention. It is a rear view of the light-emitting device (however, the state which removed the apparatus support body) of Embodiment 4 of this invention. It is the perspective view which looked at the heat radiator with which the light emission unit of Embodiment 4 of this invention is provided from diagonally back. It is a side view of the heat sink with which the light emission unit of the light-emitting device of Embodiment 4 of this invention is provided. It is a side view of the light-emitting device of Embodiment 5 of this invention. It is the figure which looked at the 2nd member of the apparatus support body in the light-emitting device of Embodiment 5 of this invention, and the arm part of the light-emitting unit from the light-emitting surface side. It is the figure which looked at the 2nd member of the apparatus support body in the light-emitting device of the modification of Embodiment 5 of this invention, and the arm part of the light-emitting unit from the light-emitting surface side. It is a perspective view of the light emission unit (however, the state which removed the reflecting plate) with which the light-emitting device of Embodiment 6 of this invention is provided. It is a perspective view of the light emission unit (however, the state which removed the reflecting plate) with which the light-emitting device of Embodiment 7 of this invention is provided. It is a perspective view of the light emission unit (however, the state which removed the reflecting plate) with which the light-emitting device of Embodiment 8 of this invention is provided. It is a perspective view of the light emission unit (however, the state which removed the reflecting plate) with which the light-emitting device of Embodiment 9 of this invention is provided. It is a perspective view of the light emission unit (however, the state which removed the reflecting plate) with which the light-emitting device of Embodiment 10 of this invention is provided. It is a perspective view of the light emission unit (however, the state which removed the reflecting plate) with which the light-emitting device of Embodiment 11 of this invention is provided.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the light-emitting device according to Embodiment 1 of the present invention as viewed obliquely from the front. FIG. 2 is a perspective view of the light emitting device shown in FIG. 1 as viewed obliquely from behind. The light-emitting device 1 according to the first embodiment shown in FIGS. 1 and 2 is a high-ceiling illuminating device used to illuminate the device main body from the ceiling surface and illuminate the light-emitting surface toward the floor surface. The light emitting device 1 is preferably used as an illumination device that emits a large luminous flux of, for example, several thousand to several tens of thousands of lumens. The light-emitting device 1 includes a plurality of light-emitting units 2, an annular frame 3, a device support 4, a column 5, a translucent plate 6, a dummy reflector 7, a power supply 8, and light emission. A unit support plate 10. The light emitting device 1 of the first embodiment projects light downward in FIG. In the following description, for the sake of convenience, the direction in which the light emitting device 1 projects light (that is, the light emitting surface side) is defined as the front (front), and the opposite direction is defined as the rear (rear). The frame 3 has an annular shape concentric with the center line (center axis) of the light emitting device 1. In the following description, the center line of the frame 3 (that is, the center line of the light emitting device 1) is simply referred to as “center line”. The frame body 3 has a function of supporting the plurality of light emitting units 2. The overall shape of the light-emitting device 1 of Embodiment 1 is a shape that forms a substantially circular shape when the light-emitting device 1 is viewed from the direction of the center line.

  FIG. 3 is an enlarged perspective view of a part of FIG. 2 (near the light emitting unit support plate 10). FIG. 4 is a perspective view of the light emitting unit 2 as viewed obliquely from the front. In the light emitting unit 2 shown in FIG. 4, the light emitting element and the heat radiating body (the light source mounting plate 23, the heat radiating fin mounting plate 24, and the heat radiating fin 25 described later) that radiate the heat generated by the light emitting element to the surrounding air are integrated. It is a unit that became. In the first embodiment, an LED (Light Emitting Diode) light source 21 is used as the light emitting element of the light emitting unit 2. The light emitting unit 2 emits a predetermined amount of light flux. In the first embodiment, four light emitting elements (LED light sources 21) are mounted on one light emitting unit 2, but in the present invention, the number of light emitting elements mounted on the light emitting unit 2 may be any number, One may be sufficient. The light emitting unit 2 includes a frame body fixing portion 231 that is fixed to the frame body 3. In the light emitting unit 2 according to the first embodiment, the LED light source 21 is arranged in a fan-shaped range with the center of the frame 3 as a vertex and a central angle of 90 ° when viewed from the center line direction. The heat radiator provided in the light emitting unit 2 is designed to have a heat radiation performance corresponding to the amount of heat generated from the LED light source 21 mounted on the light emitting unit 2. In the first embodiment, the entire light emitting unit 2 is located on the inner peripheral side of the frame 3 as viewed from the direction of the center line. The details of the structure of the light emitting unit 2 will be described later.

  The light emitting device 1 of the first embodiment can mount a maximum of four light emitting units 2 (see FIGS. 9 and 10 to be described later). The light emitting device 1 shown in FIGS. 1 and 2 has two light emitting units 2 mounted thereon. In the light emitting device 1 of the first embodiment, the number of the light emitting units 2 mounted can be three (see FIGS. 11 and 12 described later). According to such a light emitting device 1, the following effects can be obtained.

(1) In the same apparatus size mainly defined by the size (diameter) of the frame body 3, the number of mounted light emitting units 2 can be easily changed. Moreover, since the mounting position of the light emitting unit 2 can be rotated around the center line, the degree of freedom of arrangement of the plurality of light emitting units 2 is high. For these reasons, when manufacturing a plurality of products having different luminous flux classes or different surface emission intensity distributions in the same apparatus size, it is possible to share components and assembling processes. For this reason, parts cost and assembly cost are reduced, and an inexpensive product can be provided.
(2) Since each of the light emitting units 2 includes an independent radiator, even when the number of the light emitting units 2 mounted is changed and the luminous flux class is changed, an appropriate apparatus weight can be obtained. For example, in a product in which the number of mounted light emitting units 2 is reduced, the weight of the entire radiator is reduced according to the number of mounted light emitting units 2. Therefore, according to the number of the light emitting units 2 mounted, that is, according to the respective light flux classes, the weight of the entire heat radiating body becomes a weight commensurate with the heat generation amount of the entire light emitting device 1. Therefore, the weight of the light emitting device 1 does not become excessive and can be set to an appropriate weight.

  The two light emitting units 2 included in the light emitting device 1 shown in FIGS. 1 and 2 are arranged so that the mutual positional relationship is a positional relationship that is rotated by 180 ° around the center line. As described above, in the present invention, it is preferable to arrange the plurality of light emitting units 2 at equiangular intervals around the center line. Thereby, since arrangement | positioning of the several light emission unit 2 becomes a rotationally symmetrical arrangement | positioning, favorable light quality is obtained. In the light emitting device 1 shown in FIGS. 1 and 2, the dummy reflector 7 is installed in a gap formed between the light emitting unit 2 and the light emitting unit 2 on the inner peripheral side of the frame 3. The dummy reflector 7 shown in FIGS. 1 and 2 has a substantially sector shape with the center of the frame 3 as a vertex and a central angle of 90 ° as viewed from the direction of the center line. The dummy reflector 7 fills a gap formed between the light emitting unit 2 and the light emitting unit 2. For this reason, it is possible to prevent light leaking to the rear of the light emitting device 1. Moreover, the light emitted from the light emitting unit 2 can be reflected forward by the dummy reflector 7, and the effect of increasing the amount of light emitted by the light emitting device 1 can also be obtained.

  The frame 3 is fixed to the device support 4. The device support 4 has a first member 41 having a gate shape (U-shape). The distance between the two leg portions of the first member 41 is substantially equal to the diameter of the frame 3. The front end portions of the two leg portions of the first member 41 are respectively fixed to the outer peripheral portion of the frame body 3. The apparatus support 4 further includes a second member 42 that is fixed in a state of being spanned between two legs of the first member 41. The first member 41 and the second member 42 are formed, for example, by bending a flat plate. The outer shape of the light emitting device 1 is generally defined by the device support 4 and the frame 3. A hanging portion 9 for attaching the light emitting device 1 to the ceiling surface is provided at the rear portion of the device support 4. A power source 8 is mounted on the second member 42 of the apparatus support 4. Note that the power supply 8 may not be integrated into the light-emitting device 1 and the power supply 8 may be separated. That is, the light emitting device 1 may not include the power source 8 and the second member 42. In a state where the light emitting device 1 is suspended by the suspension unit 9, the frame body 3 is supported by the device support 4.

  As shown in FIG. 2, the light emitting unit 2 and the frame 3 are fixed by screws 40. Moreover, in this Embodiment 1, as shown in FIG. 3, the some light emission unit 2 is mutually connected via the disk-shaped light emission unit support plate 10 (connection part) provided on the centerline. . Thereby, the light emitting units 2 can be supported more firmly by connecting the plurality of light emitting units 2 to each other at positions close to the center line. Moreover, the light-emitting device 1 of this Embodiment 1 is provided with the support | pillar 5 located on a centerline. The light emitting unit support plate 10 is fixed to the front end portion of the column 5. The rear end portion of the column 5 is fixed to the second member 42 of the device support 4. That is, the light emitting unit support plate 10 is connected to the frame body 3 via the support column 5 and the device support body 4. With such a configuration, the light emitting unit 2 is supported by the frame 3 and the light emitting unit support plate 10 on the inner peripheral side, so that the light emitting unit 2 can be supported more firmly.

  FIG. 5 is an exploded perspective view of the light emitting unit 2 as viewed obliquely from the front. FIG. 6 is a perspective view of the light emitting unit support plate 10 as viewed obliquely from behind. FIG. 7 is a perspective view of the light source mounting plate 23 provided in the light emitting unit 2 as viewed obliquely from behind. FIG. 8 is a cross-sectional view of the light emitting device 1 cut along a plane including the center line.

  As shown in FIG. 5, each LED light source 21 included in the light emitting unit 2 is attached to an individual socket 26. FIG. 5 shows a state after the LED light source 21 is mounted on the socket 26. These sockets 26 are attached to the front surface of the common light source attachment plate 23. The radiation fin mounting plate 24 is installed in contact with the rear surface of the light source mounting plate 23. The radiating fins 25 are attached to the radiating fin mounting plate 24 by a method such as welding or fitting. The heat generated by the LED light source 21 is transferred to the heat radiating fins 25 through the light source mounting plate 23 and the heat radiating fin mounting plate 24, and efficiently radiated from the heat radiating fins 25 having a large surface area to the surrounding air. In the light emitting unit 2, the temperature of the LED light source 21 can be lowered by such a configuration, so that the efficiency of the LED light source 21 can be improved and the life can be extended. Further, the arrangement direction of the radiation fins 25 is arranged so as to extend from the center of the light emitting device 1 to the outer peripheral side of the light emitting device 1. In the light emitting unit 2 according to the first embodiment, the light source attachment plate 23, the radiation fin attachment plate 24, and the radiation fin 25 correspond to a radiator.

  It is desirable to use a material having a high thermal conductivity or a material having a high emissivity as the material constituting the light source mounting plate 23, the radiating fin mounting plate 24, and the radiating fin 25. For example, an aluminum alloy is preferably used as a material having high thermal conductivity. Moreover, when the light source attachment plate 23, the radiation fin attachment plate 24, and the radiation fin 25 are made of an aluminum alloy, it is preferable that the surface of each component is subjected to alumite treatment. By applying alumite treatment to the surface, the emissivity can be increased and the heat dissipation can be further improved. In that case, it is preferable that all parts are surface-treated, but only a part of the parts may be used. In the first embodiment, the light source mounting plate 23 and the radiation fin mounting plate 24 are configured as separate members. However, the light source mounting plate 23 and the radiating fin mounting plate 24 may be configured as members integrated with each other.

  Moreover, in this Embodiment 1, the light emission unit 2 has the reflecting plate 22 attached to the front surface. The reflection plate 22 has an opening that exposes the light emitting portion of each LED light source 21, that is, an opening that surrounds the light emitting portion of each LED light source 21. On the inner periphery of the opening, a reflecting portion 221 that is inclined like a conical side surface is formed. According to such a reflection plate 22, the light emitted in the horizontal direction out of the light emitted from the LED light source 21 can be reflected by the reflection unit 221 and irradiated in the forward direction. As a material constituting the reflector 22, for example, a highly reflective resin material is preferably used.

  The socket 26 is preferably made of ceramics or resin. When the ceramic socket 26 is used, the LED light source 21 and the radiator portion can be more reliably insulated and an excellent heat radiation effect from the ceramic surface of the socket 26 can be expected. Further, when the resin socket 26 is used, the LED light source 21 and the radiator portion can be more reliably insulated, and the weight reduction and cost reduction can be further improved. In addition, although illustration is abbreviate | omitted about the electric power feeding to the LED light source 21, it is performed via the wiring from the power supply 8. FIG.

  In the first embodiment, the LED light source 21 provided in the light emitting unit 2 is a chip-on-board type LED light source. As a result, the mounting area can be reduced and the size of the light emitting unit 2 can be reduced as compared with a configuration in which a plurality of packaged LED chips are mounted to obtain a desired light flux. As a result, the entire light emitting device 1 can be reduced in size and weight. In particular, as the LED light source 21 in the first embodiment, for example, a white light emitting chip-on-board in which a plurality of blue LED bare chips are arranged on a substrate and sealed with a resin material mixed with a yellow phosphor. A type of LED light source can be preferably used.

  As shown in FIG. 6, the light emitting unit support plate 10 is formed with an opening 101 through which air can pass and a screw hole 102. In the present embodiment, the openings 101 are formed at four locations at regular intervals along the circumferential direction, and the screw holes 102 are formed at 12 locations at regular intervals along the circumferential direction. As shown in FIG. 7, the light source mounting plate 23 has a substantially fan shape. The light source mounting plate 23 includes a frame body fixing portion 231 that is fixed to the frame body, and an inner peripheral side fixing portion 232 that is fixed to the light emitting unit support plate 10. The frame fixing portion 231 is formed with a screw hole through which the screw 40 is passed. The inner peripheral side fixing portion 232 is formed with a screw hole for passing a screw 50 to be fastened to the screw hole 102 of the light emitting unit support plate 10 and an opening 233 through which air can pass.

  In FIG. 8, the light emitting unit 2 is provided on the right side of the column 5, and the dummy reflector 7 is provided on the left side of the column 5. Note that the cross-sectional view of FIG. 8 is not exactly a cross-sectional view on the same plane. That is, in FIG. 8, for convenience of understanding the mounting structure of each component, a screw 40 for fixing the light emitting unit 2 and the frame body 3, and a screw 50 for fixing the light emitting unit 2 and the light emitting unit support plate 10. Although the device support 4 and the heat radiation fins 25 of the light emitting unit 2 are illustrated on the same plane, they are not necessarily located on the same plane in the actual structure.

  As shown in FIG. 8, almost the entire light emitting unit 2 is disposed on the inner peripheral side of the annular frame 3. The frame fixing portion 231 of the light emitting unit 2 is in contact with the rear end surface of the frame 3. The light emitting unit 2 and the frame 3 are fixed by tightening the screws 40 that are passed through the screw holes formed in the frame body fixing portion 231 and the screw holes 31 formed in the frame body 3. The light emitting unit support plate 10 is fixed to the front end portion of the column 5 by screws 60. The light emitting unit 2 and the light emitting unit support plate 10 are fixed by tightening a screw 50 that is passed through the screw hole formed in the inner peripheral side fixing portion 232 of the light emitting unit 2 and the screw hole 102 of the light emitting unit support plate 10. Has been. The rear end portion of the column 5 is fixed to the second member 42 of the device support 4. Therefore, the inner peripheral side fixing portion 232 of the light emitting unit 2 is supported by the device support 4 via the light emitting unit support plate 10 and the support column 5. As described above, in the first embodiment, the light emitting unit 2 has both the frame body fixing portion 231 and the inner peripheral side fixing portion 232 with respect to the frame body 3 and the device support body 4 corresponding to the main body of the light emitting device 1. It is fixed with. For this reason, the light emitting unit 2 can be more firmly fixed. In the first embodiment, the light emitting unit support plate 10 and the inner peripheral side fixing portion 232 constitute a connecting portion that connects the plurality of light emitting units 2 at positions close to the center line.

  The dummy reflecting plate 7 includes an inner peripheral side fixing portion 71 fixed to the light emitting unit support plate 10 and a frame body fixing portion 72 fixed to the frame body 3. The dummy reflector 7 and the frame body 3 are fixed by tightening the screws 40 passed through the screw holes formed in the frame body fixing portion 72 and the screw holes 31 formed in the frame body 3. Further, the dummy reflector 7 and the light emitting unit support plate 10 are fixed by tightening a screw 50 passed through the screw hole formed in the inner peripheral side fixing portion 71 and the screw hole 102 of the light emitting unit support plate 10. ing.

  The translucent plate 6 has a disk shape having an outer diameter slightly smaller than the inner diameter of the frame 3. The light transmitting plate 6 is fixed by being sandwiched between a flange portion provided on the inner periphery of the frame 3 and the front surfaces of the light emitting unit 2 and the dummy reflecting plate 7. The translucent plate 6 corresponds to a transparent cover that covers the installation surface side of the LED light source 21 of the plurality of light emitting units 2 included in the light emitting device 1. The light projected from the light emitting unit of the light emitting unit 2 is projected outside the light emitting device 1 through the light transmitting plate 6. The translucent plate 6 has a function of protecting the LED light source 21 and a function of light distribution control. The translucent plate 6 is made of a translucent resin or glass material whose surface is clear or blasted according to the intended light quality. Further, depending on the intended light quality, the translucent plate 6 may have a lens function.

  An opening 61 through which air can pass is formed at the center of the light transmitting plate 6. In the light emitting device 1 according to the first embodiment, as shown in FIG. 8, the air in front of the light emitting device 1 flows into the opening 61 of the translucent plate 6 and is formed in the light emitting unit support plate 10. 101 and the opening 233 formed in the inner peripheral side fixing portion 232 can flow to the radiation fin 25 of the light emitting unit 2. Thereby, the air flow path from the center part of the light-emitting device 1 to the radiation fin 25 is formed. For this reason, the heat dissipation effect in the radiation fin 25 can be improved. Further, the arrangement direction of the radiation fins 25 is arranged so as to extend from the center of the light emitting device 1 (that is, the inner peripheral side of the frame 3) toward the outer peripheral side of the light emitting device 1 (that is, the outer peripheral side of the frame 3). Therefore, the air flowing from the center of the light emitting device 1 passes through the surface of the radiation fin 25. For this reason, the heat radiation effect in the heat radiation fin 25 is further improved, and the temperature of the LED light source 21 can be further lowered.

  As described above, in the first embodiment, almost the entire light emitting unit 2 is located on the inner peripheral side of the frame 3 when viewed from the direction of the center line. For this reason, even if the number or arrangement of the light emitting units 2 is changed, the projected shape and the projected area of the entire light emitting device 1 as viewed from the direction of the center line do not change. Accordingly, in a plurality of products having different numbers or arrangements of the light emitting units 2, additional components (such as the translucent plate 6) attached to the front surface of the light emitting device 1 or additional components (such as the device support 4) attached to the frame 3. Can be shared. Therefore, the part cost and the assembly cost can be further reduced. Moreover, since the light emitting unit 2 does not protrude to the outer peripheral side of the frame 3, the light emitting device 1 can be reduced in size and the design of the light emitting device 1 is improved. However, in the present invention, a configuration in which a part of the light emitting unit 2 projects to the outer peripheral side of the frame 3 as viewed from the direction of the center line may be employed.

  In the first embodiment, the projection shape of the light emitting unit 2 when viewed from the direction of the center line is such that the width on the outer peripheral side of the frame 3 (side closer to the frame 3) is the inner periphery of the frame 3. The shape is larger than the width on the side (center side of the frame 3). With such a configuration, a wide projection area of the light emitting unit 2 can be secured inside the frame 3. As a result, since the area of the heat radiator mounted on the light emitting unit 2 can be secured widely, a high heat radiation effect can be obtained. In particular, in the first embodiment, the projection shape of the light emitting unit 2 when viewed from the direction of the center line is substantially fan-shaped with the center of the frame 3 as the apex. For this reason, the projection area of the light emitting unit 2 can be further ensured.

  FIG. 9 is a perspective view of the light-emitting device 1 according to the first embodiment on which four light-emitting units 2 are mounted as viewed obliquely from the front. FIG. 10 is a perspective view of the light emitting device 1 shown in FIG. 9 as viewed obliquely from behind. In the first embodiment, the central angle of the substantially sector shape, which is the projection shape of the light emitting unit 2 when viewed from the direction of the center line, is 90 °. For this reason, as shown in FIGS. 9 and 10, by arranging four light emitting units 2 around the center line at intervals of 90 °, the light emitting unit 2 and the light emitting unit 2 can be seen from the direction of the center line. There is an advantage that there is no gap between them.

  In order to obtain the same effect as described above, in the present invention, the projection shape of the light emitting unit 2 when viewed from the direction of the center line has two sides, and the extension lines of the two sides pass through the center of the frame 3. The angle formed by these two sides is preferably 360 ° / N (where N is an integer of 3 or more). In such a case, N light emitting units 2 are mounted on the light emitting device 1, and the light emitting units 2 and the light emitting units 2 emit light by arranging them at equiangular intervals of 360 ° / N around the center line. There is an advantage that there is no gap between the unit 2. In this case, the projection shape of the light emitting unit 2 when viewed from the direction of the center line may not be a substantially fan shape, and may be, for example, a polygon including sides other than the two sides.

  The light emitting unit 2 according to the first embodiment has the LED light source 21 disposed in a fan-shaped range with the center of the frame 3 as a vertex and a central angle of 90 ° when viewed from the center line direction. However, in the present invention, the light emitting unit 2 is configured such that the LED light source 21 is disposed within a fan-shaped range with the center of the frame 3 as a vertex and a central angle of 120 ° or less as viewed from the direction of the center line. I just need it. With such a light emitting unit 2, at least three light emitting units 2 can be mounted on the frame 3. For this reason, the number of light emitting units 2 mounted on the light emitting device 1 can be changed to at least three and two, and the same effect as described above can be obtained. Note that it is not preferable that the number of light emitting units 2 mounted on the light emitting device 1 be one because the light distribution is biased with respect to the center of the light emitting device 1.

  FIG. 11 is a perspective view of the light emitting device 1 according to the first embodiment on which three light emitting units 2 are mounted as viewed obliquely from the front. FIG. 12 is a perspective view of the light emitting device 1 shown in FIG. 11 as viewed obliquely from behind. In the light-emitting device 1 shown in FIGS. 11 and 12, three light-emitting units 2 are arranged around the center line at intervals of 120 °. And the dummy reflector 7A which fills the substantially fan-shaped gap | interval whose center angle produced between the light emission unit 2 and the light emission unit 2 is 30 degrees is provided. As described above, in a product in which the number or arrangement of the light emitting units 2 is changed, dummy reflectors having different shapes may be provided in accordance with the size of the gap between the light emitting units 2. If light leakage to the rear of the light emitting device 1 is not a problem, or if the effect of increasing the amount of light forward by the dummy reflector is not necessary, a dummy reflector that fills the gap between the light emitting units 2 may not be provided. Also good.

  As described above, in the first embodiment, the light emitting unit 2 is fixed by the screws 40 and 50. The frame body 3 is provided with twelve screw holes 31 at equal intervals along the circumferential direction. Similarly, the light emitting unit support plate 10 is also provided with twelve screw holes 102 at equal intervals along the circumferential direction. Each light emitting unit 2 is fixed using two screw holes 31 on the frame 3 side and two screw holes 102 on the light emitting unit support plate 10 side. Thus, in this Embodiment 1, since the twelve screw holes 31 and 102 are provided along the circumferential direction, the mounting position of the light emitting unit 2 is rotated around the center line every 30 °. Can be adjusted to the position. Therefore, when four light emitting units 2 are mounted at 90 ° intervals, when three light emitting units 2 are mounted at 120 ° intervals, and when two light emitting units 2 are mounted at 180 ° intervals, It is possible to cope with any of these cases. Thus, the number of mounting screw holes 31 and 102 corresponding to the common multiple (12 in the above example) of the number of light emitting units 2 that can be mounted (2, 3 and 4 in the above example) is By providing the light emitting units 2 at equal intervals along the direction, the light emitting units 2 can be arranged in a rotationally symmetrical manner when any number of the light emitting units 2 are mounted. As another example, when the angle formed by two sides of the projected shape of the light emitting unit 2 when viewed from the direction of the center line is 60 °, a maximum of six light emitting units 2 are mounted, and five are mounted. In order to be able to cope with both the case of mounting and the case of mounting four, 60 screw holes 31, 102 that are common multiples of 6, 5, and 4 may be provided. If it is not necessary to consider the case of five, screw holes 31 and 102 may be provided at 12 locations which are common multiples of 6 and 4. Needless to say, the fixing method of the light emitting unit 2 is not limited to screw fixing, but may be fixing by rivets, welding, or the like. In the case of welding or the like, in particular, since the position of the screw holes 31 and 102 is not limited, it can be fixed at a free position. Moreover, the marking etc. which show the attachment position of the light emission unit 2 may be given to the frame 3 grade | etc.,. In the first embodiment, one light emitting unit 2 is fixed at two places on the frame 3 side and two places on the light emitting unit support plate 10 side, but the number of the fixed places is a number that can be reliably fixed. Any number is acceptable.

  FIG. 13 is a rear view of the light-emitting device 1 shown in FIGS. 9 and 10 (with the device support 4 removed). Although the arrow in FIG. 13 has shown the flow of the air from the center part of the light-emitting device 1, only the one part flow is shown and the symmetrical flow is abbreviate | omitted. As described with reference to FIG. 8, in the light emitting device 1 of the first embodiment, the air in front of the light emitting device 1 causes the opening 61 of the translucent plate 6 and the opening 101 of the light emitting unit support plate 10. And it can flow to the radiation fin 25 through the opening 233 of the inner peripheral side fixing part 232 of the light emitting unit 2. And since each radiation fin 25 is arrange | positioned so that it may extend from the inner peripheral side of the light-emitting device 1 (frame 3) to an outer peripheral side as shown in FIG. Can flow to the outer peripheral side. With such a configuration, the contact area between the air flowing through the above-described flow path and the radiation fins 25 is increased, and a higher heat radiation effect can be obtained.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. 14. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Is omitted. FIG. 14 is a rear view of the light-emitting device 1 according to Embodiment 2 of the present invention (where the device support 4 is removed). The arrows in FIG. 14 indicate the flow of air from the central portion of the light emitting device 1 of the second embodiment, but only a part of the flow is shown, and the symmetrical flow is omitted.

  The plurality of heat dissipating fins 25 provided in the light emitting unit 2 in the first embodiment described above are configured of independent components for each sheet. On the other hand, as shown in FIG. 14, the plurality of heat radiation fins 25 </ b> B provided in the light emitting unit 2 in the second embodiment are integrally formed and configured as a single component as a whole. Such a radiation fin 25B can be produced by, for example, extrusion. Thus, in this Embodiment 2, since the several radiation fin 25B is comprised by one component, the assembly property of the light emission unit 2 improves.

  In the light emitting device 1 shown in FIG. 14, the light emitting unit 2 is disposed so that there is no gap between the light emitting unit 2 and the light emitting unit 2, and the heat radiating fins 25 </ b> B of one light emitting unit 2 and the heat radiating fins 25 </ b> B of the other light emitting unit 2 are arranged. A gap is formed between the two. Then, the air in front of the light emitting device 1 passes through the opening 61 of the translucent plate 6, the opening 101 of the light emitting unit support plate 10, and the opening 233 of the inner peripheral side fixing portion 232 of the light emitting unit 2. The air flows into the central portion of 1 and flows through the gap between the heat radiation fins 25B and the heat radiation fins 25B of the adjacent light emitting units 2 to the outer peripheral side. With such a configuration, the contact area between the air and the heat radiating fins 25B is increased, and a higher heat radiating effect can be obtained.

Embodiment 3 FIG.
Next, the third embodiment of the present invention will be described with reference to FIG. 15 to FIG. 19. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 15 is a side view of the light emitting device 1A according to Embodiment 3 of the present invention. FIG. 16 is a rear view of the light emitting device 1A according to the third embodiment of the present invention (however, the device support 4 is removed). FIG. 17 is a perspective view of the heat radiating body provided in the light emitting unit 2 of the light emitting device 1A according to Embodiment 3 of the present invention as viewed obliquely from behind. FIG. 18 is a perspective view of the light emitting device 1A according to Embodiment 3 of the present invention (where one light emitting unit 2 has been removed) as viewed obliquely from the rear. FIG. 19 is a cross-sectional view of the light-emitting device 1A according to Embodiment 3 of the present invention cut along a plane including the center line.

  As shown in FIGS. 15 and 16, the light emitting device 1 </ b> A of the third embodiment has a center fixing portion 11 </ b> A that fixes the light emitting units 2 at positions close to the center line. The center fixing part 11A is formed by a disk-shaped connecting part 12. Each light emitting unit 2 has an arm portion 27. The fixed portion at the tip of the arm portion 27 of each light emitting unit 2 is fixed to the connecting component 12, whereby the light emitting units 2 are fixed via the connecting component 12. The central fixing portion 11 </ b> A is located behind the rear end of the radiator of the light emitting unit 2. That is, in FIG. 15, the center fixing portion 11 </ b> A is located at a position higher than the upper end of the radiation fin 25.

  As shown in FIG. 17, the arm part 27 protrudes from the substantially fan-shaped top part of the radiation fin attachment plate 24 toward the rear of the light emitting device 1A. The connecting component 12 is provided with a plurality of screw holes for fixing the arm portions 27 of the respective light emitting units 2 along the circumferential direction. In the illustrated configuration, the fixed portion at the tip of the arm portion 27 is fixed to the connecting component 12 with a screw. Further, the base end portion of the arm portion 27 is fixed to the radiating fin mounting plate 24 with screws. These fixing methods are not limited to screws, and any method such as welding, brazing, bonding, and fitting may be used.

  As shown in FIG. 18, the light emitting device 1 </ b> A has an opening 13 in the vicinity of the center line on the light emitting surface side. Each light-emitting unit 2 has a shape in which the vicinity of the top portion of a substantially fan shape is missing when viewed from the light-emitting surface side. Since each light emitting unit 2 has such a shape, the opening 13 is formed.

  As shown in FIG. 19, air can flow from the light emitting surface side of the light emitting device 1 </ b> A through the opening 13 to the radiator (radiating fin 25) of the light emitting unit 2. For this reason, the heat dissipation effect in the radiation fin 25 can be improved, and the temperature of the LED light source 21 can be lowered. As a result, the efficiency and life of the LED light source 21 can be improved.

  In the light emitting device 1A of the third embodiment described above, each light emitting unit 2 is attached to the frame 3 and the center fixing portion 11A by providing the center fixing portion 11A that fixes the light emitting units 2 at positions close to the center line. And can be fixed on both sides. For this reason, the attachment rigidity of the light emitting unit 2 can be improved. In addition, since the central fixing portion 11A is positioned behind the rear end of the heat radiating body (radiating fin 25) of the light emitting unit 2, air flowing from the opening 13 flows to the heat radiating fin 25 without hitting the central fixing portion 11A. Can do. For this reason, as shown in FIG. 19, air can be entirely applied to the rear end of the radiation fin 25, the heat radiation effect in the radiation fin 25 can be further improved, and the temperature of the LED light source 21 can be further lowered. it can. Further, since the central fixing portion 11A is formed using the connecting component 12, the central fixing portion 11A can be formed with a simple structure.

Embodiment 4 FIG.
Next, the fourth embodiment of the present invention will be described with reference to FIGS. 20 to 23. The difference from the above-described first and third embodiments will be mainly described, and the same part or corresponding part will be the same. Reference numerals are assigned and description is omitted. FIG. 20 is a side view of light-emitting device 1B according to Embodiment 4 of the present invention. FIG. 21 is a rear view of the light emitting device 1B according to Embodiment 4 of the present invention (however, the device support 4 is removed). FIG. 22 is a perspective view of the heat radiating body provided in the light emitting unit 2 of the light emitting device 1B according to Embodiment 4 of the present invention, as viewed obliquely from behind. FIG. 23 is a side view of a heat radiating body provided in light-emitting unit 2 of light-emitting device 1B according to Embodiment 4 of the present invention.

  As shown in FIGS. 20 and 21, the light emitting device 1 </ b> B of the fourth embodiment has a center fixing portion 11 </ b> B that fixes the light emitting units 2 at positions close to the center line. Each light emitting unit 2 is provided with a connecting piece 28 at a position close to the center line. The center fixing portion 11B is formed by connecting the connecting pieces 28 of the adjacent light emitting units 2 together. The center fixing portion 11B is located behind the rear end of the heat radiator of the light emitting unit 2. That is, in FIG. 20, the center fixing portion 11 </ b> B is located at a position higher than the upper end of the radiation fin 25. In the first embodiment, the connecting pieces 28 are fixed to each other with screws, but the method of fixing the connecting pieces 28 is not limited to screws, but welding, brazing, adhesion, fitting Any method is acceptable.

  As shown in FIG. 22, the shape of the connecting piece 28 is a substantially arc-shaped elongated shape when viewed from the direction of the center line. Screw holes for attaching screws for connecting the connecting pieces 28 to each other are formed in the first end portion 28a and the second end portion 28b of the connecting piece 28, respectively. The connecting piece 28 is fixed to the radiating fin mounting plate 24 via the arm portion 29. The arm part 29 protrudes from the substantially fan-shaped top part of the radiation fin attaching plate 24 toward the rear of the light emitting device 1B. The fixing method of the arm portion 29 and the radiation fin mounting plate 24 may be any method such as screw fixing, welding, brazing, adhesion, and fitting. Further, in the configuration shown in the figure, the connecting piece 28 and the arm portion 29 are integrally formed, but both may be configured as separate parts.

  FIG. 23 is a view of the radiating fin mounting plate 24 as viewed from the substantially fan-shaped inner peripheral side. As shown in FIG. 23, the first end portion 28a and the second end portion 28b of the connecting piece 28 are formed so that the positions in the center line direction are slightly different. That is, with respect to the center line direction, the front surface position (height) of the first end portion 28a is formed to be the same as the rear surface position (height) of the second end portion 28b.

  As shown in FIGS. 20 and 21, the first end portion 28a of the connecting piece 28 of each light emitting unit 2 is overlapped with the second end portion 28b of the connecting piece 28 of the adjacent light emitting unit 2 on one side, It is fixed with screws. Similarly, the second end 28b of the connecting piece 28 of each light emitting unit 2 is overlapped with the first end 28a of the connecting piece 28 of the adjacent light emitting unit 2 on the opposite side, and is fixed with screws. In this way, the connecting pieces 28 of the light emitting units 2 are connected to each other, whereby the annular center fixing portion 11B is formed.

  In the light emitting device 1B of the fourth embodiment described above, the following effects are obtained as in the third embodiment. By providing the center fixing part 11B that fixes the light emitting units 2 at positions close to the center line, each light emitting unit 2 can be fixed by both the frame 3 and the center fixing part 11B. For this reason, the attachment rigidity of the light emitting unit 2 can be improved. In addition, since the central fixing portion 11B is located behind the rear end of the heat radiating body (radiating fin 25) of the light emitting unit 2, air flowing from the opening 13 flows to the radiating fin 25 without hitting the central fixing portion 11B. Can do. For this reason, the heat dissipation effect in the radiation fin 25 can be further improved, and the temperature of the LED light source 21 can be further lowered. Further, in the fourth embodiment, compared with the third embodiment, since the connecting component 12 is not necessary, the number of components is reduced, the assembly is facilitated, and the cost is reduced.

Embodiment 5 FIG.
Next, the fifth embodiment of the present invention will be described with reference to FIGS. 24 to 26. The difference from the first, third, and fourth embodiments described above will be mainly described, and the same or corresponding portions will be described. Are denoted by the same reference numerals and description thereof is omitted. FIG. 24 is a side view of light-emitting device 1C according to Embodiment 5 of the present invention. FIG. 25 is a view of the second member 42 of the device support 4 and the arm portion 27 of the light emitting unit 2 in the light emitting device 1C according to Embodiment 5 of the present invention, as viewed from the light emitting surface side. FIG. 26 is a view of the second member 42 of the device support 4 and the arm portion 27 of the light emitting unit 2 as viewed from the light emitting surface side in the light emitting device 1C according to the modification of the fifth embodiment of the present invention.

  As shown in FIGS. 24 and 21, the light emitting device 1 </ b> C of the fifth embodiment has a central fixing portion 11 </ b> C that fixes the light emitting unit 2 to the device support 4 at a position close to the center line. Each light emitting unit 2 has an arm portion 27. The arm portion 27 protrudes from the substantially fan-shaped top portion of the radiating fin mounting plate 24 toward the rear of the light emitting device 1A. The fixed portion at the distal end portion of the arm portion 27 of each light emitting unit 2 is fixed to the second member 42 of the apparatus support 4, thereby forming the central fixing portion 11 </ b> C. The center fixing portion 11C is located behind the rear end of the heat radiator of the light emitting unit 2. That is, in FIG. 24, the center fixing portion 11 </ b> C is at a position higher than the upper end of the radiation fin 25.

  As shown in FIG. 25, the arm portion 27 of each light emitting unit 2 is fixed to the second member 42 of the apparatus support 4 with screws. This fixing method is not limited to screws, and any method such as welding, brazing, bonding, or fitting may be used. In the example shown in FIG. 25, the width of the second member 42 of the device support 4 is constant along the longitudinal direction including the central fixing portion 11C. However, as in the modification of FIG. The width of the second member 42 may be locally increased at the position of the central fixing portion 11C.

  In the light emitting device 1C of the fifth embodiment described above, the following effects are obtained as in the third embodiment. By providing the central fixing portion 11C for fixing the light emitting unit 2 to the apparatus support 4 at a position close to the center line, each light emitting unit 2 can be fixed by both the frame body 3 and the central fixing portion 11C. For this reason, the attachment rigidity of the light emitting unit 2 can be improved. In addition, since the central fixing portion 11C is positioned behind the rear end of the heat radiating body (radiating fin 25) of the light emitting unit 2, air flowing from the opening 13 flows to the radiating fin 25 without hitting the central fixing portion 11C. Can do. For this reason, the heat dissipation effect in the radiation fin 25 can be further improved, and the temperature of the LED light source 21 can be further lowered. Moreover, in this Embodiment 5, compared with Embodiment 3, since the connection component 12 becomes unnecessary, a number of parts decreases, an assembly becomes easy and cost reduces. In the fifth embodiment, the mounting rigidity of the light emitting unit 2 can be further improved as compared with the third embodiment by fixing the light emitting unit 2 to the apparatus support 4 with the center fixing portion 11C. .

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described with reference to FIG. 27. The description will focus on the differences from the first to fifth embodiments described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 27 is a perspective view of light-emitting unit 2 (provided with reflector 22 removed) included in the light-emitting device according to Embodiment 6 of the present invention. The sixth embodiment is the same as the first to fifth embodiments described above except that the configuration of the radiation fins 25 of the light emitting unit 2 is different.

  In the sixth embodiment, the radiating fins 25 are formed of sheet metal (thin metal plate). Thereby, compared with the case where the radiation fin 25 is formed by extrusion molding etc., weight reduction can be achieved. In the sixth embodiment, the plurality of heat radiating fins 25 included in the light emitting unit 2 are arranged in parallel to each other. In the sixth embodiment, the plurality of heat radiation fins 25 included in the light emitting unit 2 are formed one by one, and are fixed to the heat radiation fin mounting plate 24 one by one.

Embodiment 7 FIG.
Next, a seventh embodiment of the present invention will be described with reference to FIG. 28. The description will focus on the differences from the first to fifth embodiments described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 28 is a perspective view of light-emitting unit 2 (with the reflecting plate 22 removed) provided in the light-emitting device according to Embodiment 7 of the present invention. The seventh embodiment is the same as the first to fifth embodiments described above except that the configuration of the radiation fins 25 of the light emitting unit 2 is different.

  In the seventh embodiment, the radiating fins 25 are formed of sheet metal (thin metal plate). Thereby, compared with the case where the radiation fin 25 is formed by extrusion molding etc., weight reduction can be achieved. In the seventh embodiment, the plurality of heat radiation fins 25 included in the light emitting unit 2 are arranged in parallel to each other. In the seventh embodiment, a set of two radiating fins 25 included in the light emitting unit 2 is integrally formed. That is, in the seventh embodiment, two radiating fins 25 are formed by sheet metal processing as one component, and the two radiating fins 25 are fixed to the radiating fin mounting plate 24 as a set. For this reason, the number of parts of the radiating fin 25 can be reduced, the process of fixing the radiating fin 25 to the radiating fin mounting plate 24 is simplified, and the cost can be reduced.

Embodiment 8 FIG.
Next, an eighth embodiment of the present invention will be described with reference to FIG. 29. The description will focus on the differences from the first to fifth embodiments described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 29 is a perspective view of light-emitting unit 2 (provided with reflector 22 removed) included in the light-emitting device according to Embodiment 8 of the present invention. The eighth embodiment is the same as the first to fifth embodiments described above except that the configuration of the radiation fins 25 of the light emitting unit 2 is different.

  In the eighth embodiment, the radiating fins 25 are formed of sheet metal (thin metal plate). Thereby, compared with the case where the radiation fin 25 is formed by extrusion molding etc., weight reduction can be achieved. In the eighth embodiment, the plurality of heat radiation fins 25 included in the light emitting unit 2 are arranged in parallel to each other. In the eighth embodiment, all of the three or more radiating fins 25 included in the light emitting unit 2 are integrally formed. That is, in the eighth embodiment, all the radiation fins 25 included in the light emitting unit 2 are formed as one component by sheet metal processing, and the one component is fixed to the radiation fin mounting plate 24. For this reason, the number of parts of the radiating fin 25 can be reduced, the process of fixing the radiating fin 25 to the radiating fin mounting plate 24 is simplified, and the cost can be reduced.

Embodiment 9 FIG.
Next, a ninth embodiment of the present invention will be described with reference to FIG. 30. The description will focus on the differences from the first to fifth embodiments described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 30 is a perspective view of light-emitting unit 2 (provided with reflector 22 removed) provided in the light-emitting device according to Embodiment 9 of the present invention. The ninth embodiment is the same as the first to fifth embodiments described above except that the configuration of the radiation fins 25 of the light emitting unit 2 is different.

  In the ninth embodiment, the radiating fins 25 are formed of sheet metal (thin metal plate). Thereby, compared with the case where the radiation fin 25 is formed by extrusion molding etc., weight reduction can be achieved. In the ninth embodiment, each of the plurality of radiating fins 25 included in the light emitting unit 2 is such that the radiating fins 25 extend along the radial direction of the frame 3 when the light emitting unit 2 is mounted on the light emitting device 1. It is arranged in various directions. By disposing each radiation fin 25 in such an orientation, the heat spread in the radiation fins 25 becomes uniform as compared with the case where a plurality of radiation fins 25 are disposed in parallel, and the temperature distribution of the radiation fins 25. Becomes uniform, and the local temperature rise of the radiation fin 25 can be suppressed. In the ninth embodiment, the plurality of heat radiation fins 25 included in the light emitting unit 2 are formed one by one, and are fixed to the heat radiation fin mounting plate 24 one by one.

Embodiment 10 FIG.
Next, a tenth embodiment of the present invention will be described with reference to FIG. 31. The description will focus on the differences from the first to fifth embodiments described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 31 is a perspective view of light emitting unit 2 (provided with reflector 22 removed) included in the light emitting device according to the tenth embodiment of the present invention. The tenth embodiment is the same as the first to fifth embodiments described above except that the configuration of the radiation fins 25 of the light emitting unit 2 is different.

  In the tenth embodiment, the radiating fins 25 are formed of sheet metal (thin metal plate). Thereby, compared with the case where the radiation fin 25 is formed by extrusion molding etc., weight reduction can be achieved. In the tenth embodiment, each of the plurality of radiating fins 25 included in the light emitting unit 2 extends such that the radiating fins 25 extend along the radial direction of the frame 3 when the light emitting unit 2 is mounted on the light emitting device 1. It is arranged in various directions. By disposing each radiation fin 25 in such an orientation, the heat spread in the radiation fins 25 becomes uniform as compared with the case where a plurality of radiation fins 25 are disposed in parallel, and the temperature distribution of the radiation fins 25. Becomes uniform, and the local temperature rise of the radiation fin 25 can be suppressed. In the tenth embodiment, a set of two heat dissipating fins 25 provided in the light emitting unit 2 is integrally formed. That is, in the tenth embodiment, two radiating fins 25 are formed by sheet metal processing as one component, and the two radiating fins 25 are fixed to the radiating fin mounting plate 24 as a set. For this reason, the number of parts of the radiating fin 25 can be reduced, the process of fixing the radiating fin 25 to the radiating fin mounting plate 24 is simplified, and the cost can be reduced.

Embodiment 11 FIG.
Next, an eleventh embodiment of the present invention will be described with reference to FIG. 32. The description will focus on the differences from the first to fifth embodiments described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted. FIG. 32 is a perspective view of light-emitting unit 2 (provided with reflector 22 removed) provided in the light-emitting device according to Embodiment 11 of the present invention. The eleventh embodiment is the same as the first to fifth embodiments described above except that the configuration of the radiation fins 25 of the light emitting unit 2 is different.

  In the eleventh embodiment, the radiating fins 25 are formed of sheet metal (thin metal plate). Thereby, compared with the case where the radiation fin 25 is formed by extrusion molding etc., weight reduction can be achieved. In the eleventh embodiment, each of the plurality of radiating fins 25 included in the light emitting unit 2 is such that the radiating fins 25 extend along the radial direction of the frame 3 when the light emitting unit 2 is mounted on the light emitting device 1. It is arranged in various directions. By disposing each radiation fin 25 in such an orientation, the heat spread in the radiation fins 25 becomes uniform as compared with the case where a plurality of radiation fins 25 are disposed in parallel, and the temperature distribution of the radiation fins 25. Becomes uniform, and the local temperature rise of the radiation fin 25 can be suppressed. In the eleventh embodiment, all of the three or more radiating fins 25 included in the light emitting unit 2 are integrally formed. That is, in the eighth embodiment, all the radiation fins 25 included in the light emitting unit 2 are formed as one component by sheet metal processing, and the one component is fixed to the radiation fin mounting plate 24. For this reason, the number of parts of the radiating fin 25 can be reduced, the process of fixing the radiating fin 25 to the radiating fin mounting plate 24 is simplified, and the cost can be reduced.

  As described above, the embodiment of the present invention has been described. However, the application target of the present invention is to suspend the apparatus main body from the ceiling and illuminate the light emitting surface toward the floor as in the above-described embodiment. The present invention is not limited to a high ceiling lighting device, and can be applied to various light emitting devices in which a light source is arranged on the circumference of a single circle or a plurality of concentric circles. For example, the light emitting device of the present invention can be applied to a projector or the like. In addition, the light emitting unit in the present invention may use a light emitting element other than the LED light source. Moreover, although embodiment mentioned above demonstrated the example provided with the frame 3 which makes an annular | circular shape, the shape of the frame in this invention is not limited to an annular shape. The shape of the frame in the present invention may be a rotationally symmetric annular shape, for example, a regular polygonal ring such as a regular hexagon, a regular octagon, a regular decagon, a regular dodecagon, or a star-shaped ring. But you can.

1, 1A, 1B, 1C Light-emitting device, 2 Light-emitting unit, 3 Frame, 4 Device support, 5 Support, 6 Translucent plate, 7 and 7A Dummy reflector, 8 Power supply, 9 Suspension unit, 10 Light-emitting unit support Plate, 11A, 11B, 11C Center fixing part, 12 connecting parts, 13 opening, 21 LED light source, 22 reflector, 23 light source mounting plate, 24 heat radiating fin mounting plate, 25, 25B heat radiating fin, 26 socket, 27, 29 Arm part, 28 Connecting piece, 28a First end part, 28b Second end part 28b, 31, 102 Screw hole, 40, 50, 60 Screw, 41 First member, 42 Second member, 61, 101, 233 Opening 71, 232 Inner peripheral side fixing part, 72, 231 Frame fixing part, 221 Reflecting part

Claims (19)

A frame that forms an annular or rotationally symmetric ring;
A light emitting element; a heat radiating body that radiates heat generated by the light emitting element to surrounding air; and a frame body fixing portion that is fixed to the frame body, as viewed from the direction of the center line of the frame body A light emitting unit in which the light emitting element is arranged in a fan-shaped range with the center of the frame as a vertex and a central angle of 120 ° or less;
With
A light emitting device in which a plurality of the light emitting units are fixed to the frame.   2. The light emitting device according to claim 1, wherein substantially the entire light emitting unit is positioned on an inner peripheral side of the frame when viewed from the direction of the center line. An apparatus support for supporting the frame;
A center fixing portion for fixing the light emitting unit to the device support at a position close to the center line;
A light-emitting device according to claim 1 or 2.   The light-emitting device of Claim 1 or 2 provided with the center fixing | fixed part which fixes the said light-emitting units in the position close | similar to the said centerline. The light emitting unit has a connecting piece,
The light emitting device according to claim 4, wherein the central fixing portion is formed by connecting the connecting pieces of the adjacent light emitting units. Comprising a connecting part forming the central fixing part,
The light-emitting device according to claim 4, wherein the light-emitting unit includes a fixed portion that is fixed to the connection component.   The light emitting device according to any one of claims 3 to 6, wherein the center fixing portion is located rearward of a rear end of the heat radiating member when a light emitting surface side is a front side and a side opposite to the light emitting surface is a rear side. An apparatus support for supporting the frame;
A connecting part for connecting the light emitting units at a position close to the center line;
A strut connecting the device support and the connecting portion;
A light-emitting device according to claim 1 or 2.   The light emitting device according to any one of claims 1 to 8, further comprising an opening near the center line on the light emitting surface side, wherein air on the light emitting surface side flows to the heat radiating body through the opening.   The projection shape of the light emitting unit when viewed from the direction of the center line is a shape in which the width on the outer peripheral side of the frame is larger than the width on the inner peripheral side of the frame. The light emitting device according to any one of the above.   When viewed from the direction of the center line, the projection shape of the light emitting unit has two sides, the extension line of the two sides passes through the center of the frame, and the angle formed by the two sides is 360 ° / N ( However, N is an integer greater than or equal to 3. The light-emitting device of any one of Claims 1 thru | or 10.   The light emitting device according to any one of claims 1 to 11, wherein the heat dissipating member includes a plurality of heat dissipating fins extending from an inner peripheral side to an outer peripheral side of the frame body. A transparent cover that covers an installation surface side of the light emitting elements of the plurality of light emitting units,
An opening is formed at a position through which the center line of the cover passes,
The light-emitting device according to claim 1, wherein air flows through the opening of the cover and the radiator.   The light emitting device according to claim 1, wherein the plurality of light emitting units are arranged at equiangular intervals around the center line.   The light emitting device according to any one of claims 1 to 14, wherein the light emitting element is a chip-on-board type LED light source.   The light-emitting device according to claim 1, wherein the heat dissipating body includes heat dissipating fins formed of sheet metal.   The light-emitting device according to claim 16, wherein the heat dissipating body includes a plurality of the heat dissipating fins extending along a radial direction of the frame body.   The light-emitting device according to claim 16, wherein the heat dissipating body includes a plurality of heat dissipating fins arranged in parallel to each other.   The light emitting device according to claim 17 or 18, wherein the two or more heat radiation fins are integrally formed.

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