JP2011070941A - Light-emitting module, and lighting fixture equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-emitting module improving an optical output while suppressing an increase of its size in a radial direction and an excessive increase of temperature of a light emitting element. <P>SOLUTION: The lamp (light-emitting module) 2 includes light emitting portions 31, 41, front and rear metal bodies 11, 21 connected to each other, and a cover 51. Each of the light emitting portions 31, 41 includes a light emitting portion substrate 32, 42 and a plurality of LEDs (light-emitting elements) 33, 44 mounted on the substrate. Each of the bodies 11, 21 includes a heat receiving wall 12, 22 to which the light emitting portions 31, 41 are separately fixed in a heat conductive manner, and heat radiation parts 13, 23 continuing from them. The heat receiving wall 12 of the front body 11 having an optical through hole 14a separately opposing each LED included in the light emitting portion 41 fixed to the rear body 21. The cover 51 is connected to the front body 11. The cover 51 has optical through holes 51a-51c separately opposing the optical through hole in the rear body 21 and optical through holes 51f-51h separately opposing a plurality of LEDs 33 included in the light emitting portion 31 fixed to the front body 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light emitting module having a plurality of light emitting elements such as LEDs (light emitting diodes), and a lighting apparatus such as a spotlight including the module.

  A disc in which a plurality of LED elements are mounted in a synthetic resin container formed by screwing and covering a cover having a round window hole in the center with a shallow bottomed cylindrical main part. BACKGROUND ART A lighting fixture that houses a shaped substrate and a lens body disposed on the front surface of the substrate is known as a prior art (see, for example, Patent Document 1).

  In this lighting fixture, the substrate is single, and the plurality of LED elements are mounted on one surface of the substrate in a plane so as to have a predetermined arrangement. Further, the lens body has a lens portion facing each LED element, and is formed so as to control light distribution from each LED element by these lens portions.

JP 2002-304903 A

  When it is requested | required to raise the light output with the lighting fixture of patent document 1, it can respond by increasing the number of use of an LED element. However, in the luminaire of Patent Document 1, since a plurality of LED elements are arranged in a plane on a single substrate as described above, it is necessary to enlarge the substrate in order to increase the number of LED elements. is there. Therefore, it is inevitable that the luminaire becomes large in the radial direction.

  The LED element generates heat as it emits light. However, Patent Document 1 does not describe any technique for releasing such heat to the outside of the vessel. In particular, in the lighting device of Patent Document 1, since the container in which the substrate is stored is made of synthetic resin, the heat dissipation performance using this container is low, and therefore the temperature of the LED element is likely to rise, and accordingly It tends to cause the light emitting performance and life of the LED element to decrease. Such a defect becomes more remarkable as the number of LED elements mounted on the substrate is increased in the lighting apparatus disclosed in Patent Document 1.

  Therefore, the lighting fixture of patent document 1 has the subject that it is not suitable for improving a light output, suppressing the enlargement of radial direction and the temperature rise of a light emitting element.

  In order to solve the above-mentioned problems, a light emitting module according to claim 1 is a light emitting unit substrate and a plurality of light emitting units each having a plurality of light emitting elements mounted on the substrate; A plurality of metal bodies connected to each other having a heat receiving wall fixed to the heat receiving wall and a heat radiating portion continuous to the heat receiving wall, and relatively in the light emission direction within the adjacent bodies. The heat receiving wall of the arranged body individually faces the plurality of light emitting elements included in the light emitting unit fixed to another body arranged in the opposite emission direction with respect to the body arranged in the emission direction. The body having a plurality of light passage holes; a cover connected to the body arranged in the emission direction with the body arranged in the emission direction sandwiched between the other body; A plurality of each facing the light passage hole And a cover having a plurality of light passage holes individually facing the plurality of light emitting elements of the light emitting section fixed to the body arranged in the emission direction. It is a feature.

  In the present invention, a single layer or laminated synthetic resin or an insulating material made of an inorganic material, a metal base substrate in which an insulating layer is laminated on one side of a metal base, or the like can be used as the light emitting unit substrate. In the present invention, a semiconductor light emitting element such as an LED (light emitting diode) or an EL (electroluminescence) element can be used as the light emitting element. When the light emitting element is an LED, an SMD (surface mounted type) LED, an LED made of a bare chip, or the like can be used.

  In the present invention, the minimum number of bodies used is two, but more bodies can be used, and the plurality of bodies can be connected to each other adjacent to each other in the front-rear direction or the vertical direction. In the present invention, an aluminum alloy can be suitably used as the metal material forming the body. At the same time, the heat receiving wall and the heat radiating portion of the body are preferably formed integrally, but those formed separately may be integrated by bonding, welding, screwing, or the like. In the present invention, the shape of the heat receiving wall is not limited to a circular shape but may be a square shape. Therefore, in the present invention, the size in the radial direction refers to the size in the direction perpendicular to the longitudinal direction of the body. Yes.

  In the present invention, the cover may be made of a synthetic resin, but it is preferable that the cover is made of a metal, for example, an aluminum alloy from the viewpoint that heat can be radiated from the cover.

  In the invention of claim 1, since all of the required number of light emitting elements are not arranged in the same plane, but are arranged separately on the light emitting unit substrate supported by a plurality of bodies, the light emitting module is arranged in the radial direction. Thus, it is possible to use as many light-emitting elements as are necessary to increase the light output while suppressing the increase in size. At the same time, the light emitted from each light emitting element along the arrangement of each body is used for illumination or the like through the light passage hole of the body or cover disposed in the light emitting direction with respect to the light emitting element. The In addition, since a plurality of bodies connected to each other are provided and the heat radiating portion is secured in each body, the heat radiating area in the entire light emitting module can be increased. The heat receiving wall of each body receives heat generated by the light emitting element of the light emitting portion fixed thereto, and this heat is further conducted from the heat receiving wall to the heat radiating portion and released from the heat radiating portion to the outside. For this reason, the temperature rise of each light emitting element is suppressed.

  Therefore, according to the invention of claim 1, there is an effect that it is possible to provide a light emitting module capable of improving the light output while suppressing the enlargement in the radial direction and the temperature rise of the light emitting element.

  A light emitting module according to a second aspect of the present invention is the light emitting module according to the first aspect, wherein the peripheral wall of the body forms the heat dissipating part of the body arranged in the emission direction, and is fixed to the body arranged in the emission direction. Further, the plurality of light emitting elements included in the light emitting section are arranged close to the peripheral wall.

  In the invention of claim 2, since the light emitting element is disposed near the peripheral wall of the body forming the heat radiating portion, the heat generated by the light emitting element can be quickly conducted to the peripheral wall of the body and released to the outside. There is an advantage that the heat dissipation performance can be further improved.

  The light-emitting module of the invention of claim 3 is the light-emitting module according to claim 1 or 2, wherein a part of the plurality of light-emitting elements included in the light-emitting portion fixed to the other body arranged in the most anti-emission direction is The heat dissipating part is disposed corresponding to the center position of the heat receiving wall of the other body arranged in the most anti-emitted direction, and the heat radiating portion of the other body arranged in the most anti-emitted direction. A plurality of radiating fins projecting in the opposite-outgoing direction, and some of the radiating fins have a central position of the heat receiving wall of the other body arranged in the most opposite-outgoing direction. It is characterized by protruding so as to cross.

  In the invention of claim 3, since the heat radiating portion composed of the heat radiating fin of the body arranged in the most anti-light emitting direction can release the heat from the light emitting element moving to the heat receiving wall of the body, There is an advantage that the temperature rise of all the light emitting elements including the light emitting elements disposed corresponding to the center position of the heat receiving wall can be suppressed.

  The light emitting module according to a fourth aspect of the present invention is the light emitting module according to the third aspect, wherein the number of light emitting elements included in the light emitting section fixed to the bodies arranged in the light emitting direction relatively within the bodies connected to each other. However, the number of light emitting elements included in the light emitting portion fixed to the other body arranged in the most anti-light emitting direction is smaller.

  The body arranged in the most anti-emission direction (referred to here as the former body for convenience) carries the heat radiating portion with the radiation fin, whereas the body adjacent to this body in the emission direction (here, the latter for convenience). Since the peripheral wall carries a heat radiating portion, the heat radiating performance of the latter body is lower than that of the former body. For this reason, the number of light emitting elements allocated to these bodies is arranged as in the invention of claim 4 so that different numbers of light emitting elements can be adapted to the heat dissipation performance of each body. There is an advantage that it can be arranged.

  A lighting fixture according to a fifth aspect of the present invention includes the light emitting module according to any one of the first to fourth aspects.

  Since the light emitting module according to any one of claims 1 to 4 is provided, the light emitting module capable of improving the light output while suppressing the enlargement in the radial direction and the temperature rise of the light emitting element. There is an effect that it is possible to provide a luminaire equipped with.

  According to the light emitting module of the first aspect of the invention, there is an effect that the light output can be improved while suppressing the enlargement in the radial direction and the temperature rise of the light emitting element.

  According to the light emitting module of the invention of claim 2, in the invention of claim 1, further, there is an effect that the heat dissipation performance is further improved and the temperature rise of the light emitting element can be suppressed.

  According to the light emitting module of the invention of claim 3, in the invention of claim 1 or 2, the temperature of the light emitting element further disposed corresponding to the center position of the heat receiving wall of the body arranged in the most anti-light emitting direction. There is an effect that excessive rise can be suppressed.

  According to the light emitting module of the invention of claim 4, in the invention of claim 3, there is an advantage that a different number of light emitting elements can be arranged for each body in conformity with the heat dissipation performance of each body. There is an effect.

  According to the invention of claim 5, there is an effect that it is possible to provide a lighting fixture including a light emitting module capable of improving the light output while suppressing the enlargement in the radial direction.

It is a side view which shows the spotlight which concerns on one embodiment of this invention. It is sectional drawing which shows the spotlight of FIG. It is a perspective view which shows the lamp of the spotlight of FIG. It is a perspective view which shows the cover with which the lamp of FIG. 3 is provided seeing from a rear side. It is a perspective view which shows the front side body with which the lamp of FIG. 3 is provided seeing from the front side with the front side light emission part with which this was mounted | worn. It is a perspective view which shows the front side body with which the lamp of FIG. 3 is provided seeing from the rear side. It is a rear view which shows the spotlight of FIG. 1 in the state from which the rear body was removed. It is a perspective view which shows the rear side body with which the lamp of FIG. 3 is provided seeing from the front side with the rear side light emission part with which this was mounted | worn. It is a bottom view which shows the relationship between the rear side body of the spotlight of FIG. 1, and the light emission part before and behind.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

  Reference numeral 1 in FIGS. 1 and 2 denotes a lighting fixture, for example, a projector, specifically a spotlight. The spotlight 1 includes a light emitting module such as a lamp 2 and a fixture 3. The lamp 2 is supported by the fixture 3.

  As shown in FIG. 7, the fixture 3 has, for example, a power supply side connection portion 5 at an upper end portion of a suspension arm 4 formed in a substantially inverted U shape, and a lamp connection portion 6 at each of a pair of lower end portions. Have. The power supply side connection part 5 is attached to the installation part which is not shown in figure. The installation unit (not shown) is, for example, a ceiling rosette, a lighting rail, a support column, or the like. The lamp connecting portion 6 is connected to a connecting portion 16 described later, which is separated from the outer peripheral portion of the lamp 2 by, for example, approximately 180 °. The lamp 2 can be rotated in the vertical direction around these connecting portions 16, and the lamp 2 can be kept stationary at an arbitrary rotating position between the lamp connecting portion 6 and the connecting portion 16. The frictional engagement force is given.

  The lamp 2 includes a plurality of bodies, for example, the front body 11 and the rear body 21, and the same number as the plurality of bodies, and the front light-emitting unit 31 and the rear light-emitting unit that are arranged in parallel at the front and back, for example. 41, a cover 51, a plurality of first light distribution control components 61, a plurality of second light distribution control components 65, and the like.

  As will be described later, the front body 11 positioned relatively forward among the front and rear bodies connected to each other is disposed in the emission direction of the light emitted from the light emitting units 31 and 41, and similarly relatively The rear body 21 located behind is disposed in a direction opposite to the emission direction of the light emitted from the light emitting units 31 and 41, that is, in the opposite emission direction. Furthermore, in the case of the present embodiment, the rear body 21 is the body that is disposed in the most anti-light emitting direction among the bodies that are disposed in the front-rear direction.

  The front body 11 is an integrally molded product of a metal such as an aluminum alloy. As shown in FIGS. 2 and 5 to 7, the front body 11 includes a heat receiving wall 12 (hereinafter referred to as a front heat receiving wall for ease of identification), and a peripheral wall 13 that integrally forms a heat radiating portion. have. The shape of the front heat receiving wall 12 viewed from the front is, for example, a circle. The front heat receiving wall 12 is provided with a plurality of, for example, five light passage holes 14a to 14e. The front surface (front surface) of the front heat receiving wall 12 in which the light passage holes 14a to 14e are opened is a flat heat receiving surface.

  As shown in FIGS. 5 and 7, the light passage hole 14 a is opened at the center of the front heat receiving wall 12, and the remaining light passage holes 14 b to 14 e are preferably disposed between the light passage hole 14 a and the peripheral wall 13. It opens closer to the peripheral wall 13 than the through hole 14a. These light passage holes 14 b to 14 e are provided at equal intervals in the circumferential direction of the front heat receiving wall 12.

  The peripheral wall 13 of the front body 11 has a cylindrical shape, and a front end portion 13 a (see FIGS. 2 and 5) projects forward from the front of the front heat receiving wall 12. The peripheral wall 13 other than the front end portion 13a extends to the rear side of the front heat receiving wall 12 much longer than the front end portion 13a, and the rear portion thereof is continuously uneven with a gentle curve every 90 ° (see FIG. 6). ). Due to the shape of the rear portion, the heat radiating fins 23a positioned on the end sides in the arrangement direction in the heat radiating fins 23a to be described later are more protruded from the peripheral wall 13.

  As shown in FIGS. 6 and 7, the front body 11 is integrally formed with a plurality of connecting portions 16 that extend across the back surface (rear surface) of the front heat receiving wall 12 and the inner peripheral surface of the peripheral wall 13. These connecting portions 16 are provided alternately with the light through holes 14b to 14e. Each connecting portion 16 has a screw receiving boss portion 16a.

  The pair of connecting portions 16 separated from each other by 180 ° in each connecting portion 16 further has a recess 16b. The pair of connecting portions 16 having the recessed portions 16b are provided corresponding to portions where the rear end of the peripheral wall 13 is recessed in the front side when the front body 11 is viewed from the rear. As shown in FIGS. 3 and 5, a shallow groove 16c is formed in the surface of the peripheral wall 13 where the concave portion 16b of the pair of connecting portions 16 faces, and communicates with the groove 16c. A connecting hole 17 is opened.

  The pair of connecting holes 17 (only one is shown) is positioned on the same horizontal axis (not shown). The lamp connecting portion 6 uses a mounting shaft (not shown) that passes through the connecting hole 17 and a nut member (not shown) that is fitted in the recess 16b so as not to rotate and is screwed to the mounting shaft. It is connected to the peripheral wall 13 as described above.

  The rear body 21 is also an integrally molded product of a metal such as an aluminum alloy. As shown in FIGS. 2, 8, and 9, the rear body 21 includes a heat receiving wall 22 (hereinafter, referred to as a rear heat receiving wall for ease of identification) and a heat radiating portion 23 that is integrally continuous therewith. Have. The shape of the rear heat receiving wall 22 viewed from the front is, for example, a circle, and the front (front surface) of the rear heat receiving wall 22 is a flat heat receiving surface.

  The heat dissipating part 23 is formed by a plurality of heat dissipating fins 23 a that are integrally projected from the back surface (rear surface) of the rear heat receiving wall 22. The heat radiating fins 23a are substantially parallel to each other and extend in a direction orthogonal to a horizontal axis (not shown) passing through the pair of connecting holes 17. Therefore, in the state where the lamp 2 is stationary sideways as shown in FIG. 1, each radiating fin 23a protrudes rearward (in a direction away from the back surface of the rear heat receiving wall 22), and adjacent radiating fins 23a. As shown in FIG. 9, the gaps between them are opened in the vertical direction and in the rear direction, respectively.

  The projecting lengths of the respective heat dissipating fins 23a are not the same, and the shape connecting the projecting ends is provided so as to form an arc shape that protrudes rearward (see FIG. 9). In other words, the projection length of the radiation fin 23a located at the center of the arrangement direction of the radiation fins 23a is the longest, and the projection length gradually decreases from these to the radiation fins 23a located at both ends of the arrangement direction. .

  Providing the heat radiating fins 23a in this way makes it easy to form an upward airflow along the arc shape when the lamp 2 is used in a posture in which the protruding direction of the heat radiating fins 23a is upward, for example. Thereby, there exists an advantage which can improve the thermal radiation performance from each thermal radiation fin 23a more.

  Further, as shown in FIG. 1, the length of each radiating fin 23a in the direction perpendicular to the projecting direction is such that the radiating fins 23a located at both ends of the radiating fins 23a are arranged at the center in the arrangement direction. The fins 23a are gradually formed longer. Thereby, the shape which tied the side edge of the direction where the said length extends is provided so that the circular arc shape which may be convex upward or downward in the state of FIG. 1, for example.

  Even in such a device, it is easy to form an updraft along the arc shape in the same manner as the device in the protruding direction described above in the state where the lamp 2 is in the state of FIG. There is an advantage that the heat radiation performance from each heat radiation fin 23a can be further improved.

  As is clear from the above description, within each of the radiating fins 23a, the radiating fins 23a located in the center of the radiating fins 23a (in the case where it is necessary to identify them on the drawing, the reference numeral 23b is also written in parentheses) ) Has the maximum protrusion length and the length in the direction perpendicular to the protrusion direction. As shown in FIG. 9, the heat radiation fins 23 b having the largest heat radiation area are provided so as to cross the center position of the rear heat receiving wall 22 along the radial direction of the rear heat receiving wall 22.

  The maximum diameter of the rear body 21 is smaller than the inner diameter of the peripheral wall 13 of the front body 11. As shown in FIG. 2, the front portion of the rear body 21 is accommodated in the peripheral wall 13, and in this state, a plurality of connecting screws 25 that are individually screwed into the screw receiving boss portion 16 a through the rear heat receiving wall 22. Thus, the front body 11 and the rear body 21 aligned in the front-rear direction are connected. 7 denotes a screw through hole of the rear body 21. Most of the heat radiating fins 23 a and 23 b forming the heat radiating portion 23 of the rear body 21 protrudes outside the peripheral wall 13.

  As shown in FIGS. 5 and 9, the front light emitting unit 31 includes a front light emitting unit substrate 32 and a plurality of light emitting elements, for example, SMD type front LEDs 33 that emit white light. The number of front LEDs 33 included in the front light emitting unit 31 is smaller than the number of LEDs included in the rear light emitting unit 41 described later.

  The front light emitting unit substrate 32 is made of a metal base substrate and has, for example, a cross shape as shown in FIG. The front LED 33 is mounted on each of four end portions of the front light emitting unit substrate 32 with a predetermined interval.

  The front light emitting unit 31 is fixed to the front heat receiving wall 12 by using a plurality of screws (not shown) by bringing the metal base of the front light emitting unit substrate 32 into surface contact with the front surface of the front heat receiving wall 12 of the front body 11. Yes. Each screw fixes the front light emitting unit substrate 32 to the front heat receiving wall 12 in the vicinity of both sides of the front LED 33, and increases the closeness of the front light emitting unit substrate 32 to the front heat receiving wall 12. By such fixing, the front light emitting unit 31 is provided on the front heat receiving wall 12 so as to be able to conduct heat. Furthermore, by the fixing, each front LED 33 is arranged closer to the peripheral wall 13 than the light passage hole 14a, like the light passage holes 14b to 14e.

  2 and 8, reference numeral 34 denotes a connector, and this connector 34 is attached to the front light emitting unit substrate 32. The connector 34 is connected to the front LED 33 via a wiring pattern (not shown) formed on the front light emitting unit substrate 32. Each front LED 33 is electrically connected in series.

  As shown in FIGS. 5 and 9, the rear light emitting unit 41 includes a rear light emitting substrate 42 and a plurality of light emitting elements, for example, SMD type rear LEDs 43 and 44 that emit white light. The total number of rear LEDs 43 and 44 is greater than the number of front LEDs 33.

The rear light emitting unit substrate 42 is made of a metal base substrate, and has a cross shape as shown in FIG. 8, for example. The four rear LEDs 43 are mounted on the four end portions of the rear light-emitting unit substrate 42 at specific intervals, specifically. One rear LED 44 is connected to the rear light emitting unit substrate 42.
Implemented in the center of the. Accordingly, the rear LED 44 at the central position is provided so as to be surrounded by the other four rear LEDs 43, and the rear LED 44 is disposed corresponding to the central portion of the rear heat receiving wall 22. .

  The rear light emitting unit 41 makes the metal base of the rear light emitting unit substrate 42 come into surface contact with the front surface of the rear heat receiving wall 22 of the rear body 21 and uses a plurality of screws (not shown) for the rear heat receiving wall 22. Is fixed. In this case, when the lamp 2 is viewed from the front, the rear light-emitting unit 41 receives the rear heat reception so that each end of the front light-emitting unit 31 and each end of the rear light-emitting unit 41 are shifted by 45 degrees without overlapping each other. It is fixed to the wall 22. Each screw fixes the rear light emitting unit substrate 42 to the rear heat receiving wall 22 in the vicinity of both sides of the rear LED 43, and improves the close contact with the rear heat receiving wall 22 of the rear light emitting unit substrate 42.

  By such fixing, the rear light emitting portion 41 is provided on the rear heat receiving wall 22 so as to be able to conduct heat. Furthermore, by the fixing, four rear LEDs 43 are individually arranged to face the light passage holes 14b to 14e from the rear side, and one rear LED 44 is disposed on the light passage. It arrange | positions facing the through-hole 14a from the back side.

  In FIG. 9, reference numerals 45 and 46 denote connectors, and these connectors 45 and 46 are attached to the rear light emitting unit substrate 42. The connector 45 is connected to the rear LEDs 43 and 44 via a wiring pattern (not shown) formed on the rear light emitting unit substrate 42. The rear LEDs 43 and 44 are electrically connected in series. The connector 46 is used to electrically connect the front light emitting unit substrate 32 and the rear light emitting unit substrate 42 in series. Accordingly, the plurality of front LEDs 33 and the plurality of rear LEDs 43 and 44 emit light simultaneously with energization.

  The cover 51 is made of an integrally molded product made of metal, for example, an aluminum alloy. As shown in FIGS. 3 and 4, the cover 51 has, for example, circular light passage holes 51 a to 51 i, and the number thereof is the same as the total number of light emitting elements included in each light emitting unit.

  The light passage hole 51a is provided in a cylindrical shape at the center of the cover 51. When the cover 51 is connected to the front body 11, the light passage hole 51a continues to the light passage hole 14a and passes through the light passage hole 14a. It faces the LED 44. The light passage holes 51b to 51i are cylindrical, and are provided around the light passage hole 51a at regular intervals. The light passage holes 51b to 51e are individually connected to the light passage holes 14b to 14e of the front body 11 when the cover 51 is connected to the front body 11, and pass through the light passage holes 14b to 14e to the rear LED 43. It is individually opposed. The light passage holes 51 f to 51 i are individually opposed to the front LED 33 when the cover 51 is connected to the front body 11.

  As shown in FIGS. 2 and 4, the cover 51 has a plurality of screw receiving boss portions 53. These screw receiving boss portions 53 are provided in the circumferential direction of the cover 51 at intervals of 90 °, for example. A fitting step 54 is formed at the rear end of the cover 51.

  A plurality of covers 51 are individually screwed into the screw receiving boss portions 53 through the front heat receiving wall 12 with the outer periphery of the fitting step portion 54 being fitted to the inner periphery of the front end portion 13a of the front body 11. Are connected to the front body 11 from the front side thereof by a connecting screw (not shown). 5 to 7 indicate a screw through hole of the front body 11.

  The outer peripheral surface of the fitting step portion 54 and the inner peripheral surface of the front end portion 13a are in surface contact. Thereby, the heat of the front body 11 is conducted to the cover 51 and can be radiated from the cover 51.

  The first light distribution control component 61 and the second light distribution control component 65 are made of lenses, for example.

  As shown in FIG. 2, the first light distribution control component 61 is sandwiched between the front heat receiving wall 12 of the front body 11 and the cover 51. Each of the first light distribution control components 61 is provided so as to individually cover the front LED 33, and their front end portions (light emission end portions) are individually fitted into the light passage holes 51 f to 51 i of the cover 51. ing. Therefore, the plurality of first light distribution control components 61 are provided by individually closing the light passage holes 51f to 51i.

  As shown in FIG. 2, the second light distribution control component 65 is sandwiched between the front heat receiving wall 12 and the rear heat receiving wall 22 of the rear body 21. Each of the second light distribution control components 65 is provided so as to individually cover the rear LEDs 43 and 44, and their front end portions (light emission end portions) are formed in the light through holes 14 a to 14 e of the front heat receiving wall 12. They are fitted individually. Therefore, the plurality of second light distribution control components 65 individually close the light passage holes 14a to 14e.

  The light emitted from the rear LED 43 in the lighting state of the spotlight 1 passes through the light passage hole 14a at the center position of the front body 11 and the light passage hole 51a of the cover 51 continuous to the front side in the light utilization direction. Emitted. Similarly, the light emitted from the plurality of rear LEDs 43 passes through the light passage holes 14b to 14e at the peripheral position of the front body 11 and the light passage holes 51b to 51e of the cover 51 individually connected to the front side. It is emitted in the direction of use. The light emitted from the plurality of front LEDs 33 is emitted in the light utilization direction through the light passage holes 51 f to 51 i of the cover 51. Since each light emitted in this way passes through the plurality of first light distribution control components 61 or the plurality of second light distribution control components 65 supported by the lamp 2, desired light distribution control for the irradiation field can be performed. Done.

  In this spotlight 1, the number of LEDs 33 and 43.44 required to increase the light output and obtain a desired brightness in the illumination field of view are provided on the front body 11 and the rear body 21 arranged in parallel in the front and rear. The front light-emitting unit substrate 32 of the front light-emitting unit 31 and the rear light-emitting unit substrate 42 of the rear light-emitting unit 41 that are mounted individually are arranged. In other words, a plurality of LEDs are separately provided on a plurality of light emitting unit substrates arranged at intervals along a center line (that is, the optical axis) (not shown) of the spotlight 1.

  Thus, instead of arranging all the LEDs 33 and 43.44 necessary for increasing the light output on the same plane, the front light emitting unit substrate 32 and the rear light emitting unit substrate 32 arranged at intervals along the optical axis. Since it has been arranged on the side light emitting unit substrate 42, it is possible to prevent the respective light emitting unit substrates and the lamp 2 of the spotlight 1 having the same from increasing in the radial direction due to the arrangement of the LEDs.

  Furthermore, by arranging a plurality of metal bodies, for example, the front body 11 and the rear body 21 in parallel as described above, it is possible to secure a heat radiating portion in each of the front body 11 and the rear body 21. That is, the front body 11 can use the circular peripheral wall 13 as a heat radiating portion, and the metal cover 51 connected to the front body 11 so as to conduct heat can also be used as a heat radiating portion. The heat dissipating part 23 is composed of a plurality of heat dissipating fins 23a protruding rearward with respect to the front body 11. Therefore, the heat radiation area of the spotlight 1 can be increased.

  Heat dissipation in the state where the spotlight 1 is turned on is performed as follows. Heat generated by the LED 33 of the front light emitting unit 31 fixed to the front body 11 is conducted from the front light emitting unit substrate 32 to the front heat receiving wall 12 of the front body 11 and further conducted from the front heat receiving wall 12 to the peripheral wall 13. It is discharged from the outer peripheral surface of the peripheral wall 13 to the outside.

  In addition, in this case, a plurality of LEDs 33 included in the front light-emitting portion 31 are disposed near the peripheral wall 13 forming the heat radiating portion of the front body 11 disposed in the emission direction with respect to the rear body 21. Therefore, the heat generated by these LEDs 33 is quickly conducted to the peripheral wall 13 and released to the outside. Therefore, the heat dissipation performance from the front body 11 can be further improved. In addition, the heat of the front body 11 is also conducted to the cover 51 and released from the surface of the cover 51 to the outside.

  Further, the heat generated by the LEDs 43 and 44 of the rear light emitting part 41 fixed to the rear body 21 is conducted from the rear light emitting part substrate 42 to the heat radiating part 23 of the rear body 21 and further from the heat radiating part 23 to the outside. To be released.

  In other words, in this case, the heat dissipating part 23 is composed of the plurality of heat dissipating fins 23a, not the peripheral wall of the rear body 21, and thus a large heat dissipating area can be secured. Then, heat from the LEDs 43 and 44 moving to the rear heat receiving wall 22 of the rear body 21 is released to the outside by the heat radiating fins 23a.

  In addition, some of the radiating fins, that is, the radiating fins 23b at the center position are provided so as to cross the center position of the rear heat receiving wall 22, so that the rear heat receiving wall 22 of the rear body 21 has The heat of the LED 44 arranged corresponding to the center position can be released to the outside of the rear body 21 mainly by the heat radiating fins 23b. Thereby, the temperature rise of LED44 located so that the circumference | surroundings may be enclosed by several LED43 can be suppressed.

  As described above, in the spotlight 1 having the above-described configuration, the rear body 21 bears the heat radiating portion 23 with the heat radiating fins 23a, whereas the front body 11 bears the heat radiating portion with the peripheral wall 13; The heat dissipation performance of the body 11 is lower than that of the rear body 21. Accordingly, the number of LEDs 33 included in the front light emitting unit 31 fixed to the front body 11 is made smaller than the number of LEDs 43 and 44 included in the rear light emitting unit 41 fixed to the rear body 21. Thereby, it is possible to adapt the LEDs arranged in a shared manner to the front body 11 and the rear body 21 to the heat dissipation performance of each body.

  The lamp 2 having the above-described configuration and the spotlight 1 having the same can be radiated as described above, so that the number of mounted LEDs is large as described above, and the light output is improved accordingly. With the above heat dissipation, the LED 33, 43, and 44 are prevented from excessively rising in temperature, and the decrease in the light emission output and the decrease in the lifetime can be suppressed. Therefore, according to the said lamp 2 and the spotlight 1 provided with this, a light output can be improved, suppressing radial enlargement and LED temperature overheating.

  Since heat is radiated by a plurality of bodies arranged side by side continuously on the optical axis as described above, it is not necessary to lengthen the protruding length of the radiating fins 23a forming the radiating portion 23 of the rear body 21 excessively. Therefore, the moldability of the rear body 21 integrally formed by aluminum die casting can be improved, and the coating applied to the surface of the rear body 21 can easily reach every corner between the adjacent heat radiation fins 23a. It is also preferable in that it does not easily cause defects.

  Further, the spotlight 1 has a fixture 3 that supports the lamp 2, and a lamp connecting portion 6 of a suspension arm 4 that the fixture 3 has is connected to a front body 11 of the lamp 2. Therefore, a connecting portion 16 that is connected to the lamp connecting portion 6 is provided on the peripheral portion of the front body 11. In this case, although the increase in the radial direction of the lamp 2 is suppressed as described above, the LEDs are arranged separately in the front part and the rear part of the lamp 2, and the front body 11 The number of LEDs 33 smaller than the total number of rear LEDs 43 and 44 supported by the rear body 21 is supported. Therefore, a sufficient space can be secured between the LEDs 33 provided close to the peripheral wall 13 of the front body 11 to provide the connecting portion 16, so that the connecting portion 16 between the lamp 2 and the fixture 3 is provided with the lamp 2. The increase in diameter in the radial direction does not become a factor to promote.

  Further, as described above, the spotlight 1 that connects the front body 11 and the rear body 21 is formed to be long in the front-rear direction, and the radiating fins 23a of the rear body 21 have a tapered convex shape. It protrudes backward. Therefore, the external shape of the lamp 2 is not a form in which both ends of the cylinder are cut off, but is a substantially bullet shape that tapers toward the rear, which is preferable in terms of appearance as the spotlight 1.

  The present invention is not limited to the one embodiment. For example, a plurality of light distribution control members can be omitted, and when these light distribution control members are used, all of them may be supported by a cover, or the cover may be integrally formed as a light-transmitting molded body. Is also possible. Further, the present invention is not limited to spotlights, but can also be applied to downlights that are embedded in a ceiling. In this case, the lamp may be fixed so that it cannot swing, or the lamp is swung (rotated) with the lamp connecting portion of the fixture supporting the lamp as a fulcrum so that the light projecting direction can be arbitrarily changed. ) It may be provided so that it can.

  DESCRIPTION OF SYMBOLS 1 ... Spotlight (lighting fixture), 2 ... Lamp (light emitting module), 11 ... Front body, 12 ... Front heat receiving wall (heat receiving wall of front body), 13 ... Perimeter wall (heat radiating part of front body), 14a-14e ... (Light passage hole in the front body), 21 ... rear body, 22 ... rear heat receiving wall (heat receiving wall of the rear body), 23 ... heat radiating part of the rear body, 23a ... heat radiating fins, 23b ... heat radiating in the central part. Fins 31... Front light emitting part 32. Front light emitting part substrate 33. Front LED (light emitting element) 41. Rear light emitting part 42. Rear light emitting part substrate 43 43 Rear LED (light emitting element) 44 ... Rear side LED (light emitting element), 51 ... cover, 51a to 51i ... light through hole of cover

Claims (5)

A plurality of light emitting units having a light emitting unit substrate and a plurality of light emitting elements mounted on the substrate;
A plurality of metal bodies connected to each other with a heat receiving wall to which these light emitting parts are individually fixed so as to be capable of conducting heat and a heat radiating part continuous to the heat receiving wall, and of the adjacent bodies The heat receiving wall of the body disposed relatively in the light emitting direction is included in the light emitting unit fixed to the other body disposed in the opposite direction to the body disposed in the emitting direction. The body having a plurality of light through holes individually facing the plurality of light emitting elements;
A cover connected to the body arranged in the emission direction with the body arranged in the emission direction sandwiched between the other bodies, and a plurality of light passage holes respectively facing the light passage holes, And the cover having a plurality of light passage holes individually facing the light emitting elements of the light emitting section fixed to the body disposed in the emission direction;
A light emitting module comprising:   The peripheral wall of the body forms the heat dissipating part of the body arranged in the emitting direction, and the plurality of light emitting elements included in the light emitting part fixed to the body arranged in the emitting direction are The light emitting module according to claim 1, wherein the light emitting module is arranged close to the peripheral wall.   A part of the plurality of light emitting elements included in the light emitting portion fixed to the other body arranged in the most anti-emission direction is the heat receiving unit possessed by the other body arranged in the most anti-emission direction. The heat dissipating part that is disposed corresponding to the center position of the wall and that the other body disposed in the most anti-light emitting direction has is formed by a plurality of heat dissipating fins protruding in the anti-light emitting direction. A part of the radiating fins is protruded so as to cross a central position of the heat receiving wall of the other body arranged in the most anti-light emitting direction. The light emitting module according to 2.   The number of light emitting elements included in the light emitting portion fixed to the body disposed in the light emitting direction relative to each other among the bodies connected to each other is greater than the other body disposed in the most anti-light emitting direction. The light emitting module according to claim 3, wherein the number of light emitting elements included in the fixed light emitting unit is smaller.   A lighting fixture comprising the light emitting module according to any one of claims 1 to 4.

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