JP5800164B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire using a solid light emitting element such as a light emitting diode as a light source.

  In recent years, instead of filament light bulbs, lighting fixtures have been commercialized that employ light-emitting diodes, which are solid-state light-emitting elements with a long life and low power consumption, as light sources. For example, what is shown in Patent Document 1 is a downlight using a light emitting diode as a light source, and as described in paragraphs [0041] and [0042], the light source unit is composed of four LEDs and a reflector, A so-called SMD (Surface Mount Device) type downlight is shown in which four LEDs are mounted concentrically on a disc-shaped wiring board having a diameter of about 60 mm.

  Patent Document 2 (particularly, paragraph number [0028]) describes a downlight using a light emitting module in which a plurality of LED chips are mounted in a matrix using a COB (Chip on Board) technology on a circuit board. Illuminating devices such as are shown.

JP 2008-186776 A JP 2008-300207 A

  On the other hand, in recent years, in this type of lighting fixtures, fixtures with a large amount of light are increasingly required. For example, when a downlight with a large amount of light is configured with an SMD type, it is necessary to mount a large number of light emitting diodes. Since the instrument becomes large, there arises a problem that it does not fit within a predetermined embedding hole size such as a ceiling.

  Further, in the case of a COB substrate, a large amount of light can be achieved. However, as shown in Patent Document 2, when a single COB substrate is used, the heat generation of the light emitting diode is concentrated in one place. Heat dissipation becomes worse. In order to improve this, it is necessary to increase the heat dissipating area, and the instrument cannot be made compact. At the same time, in order to obtain a spot-like light distribution as a downlight, it is necessary to deepen the reflector, which makes it difficult to reduce the size. For this reason, in a luminaire using a solid light emitting element such as this type of light emitting diode, it is an important issue how to realize a large amount of light in a small size.

  The present invention has been made in view of the above problems, and intends to provide a small and high-intensity lighting apparatus capable of obtaining necessary heat dissipation and predetermined light distribution performance without increasing the size. .

The invention of the lighting fixture according to claim 1 is an appliance main body constituted by a thermally conductive member having an opening provided on one end side, a recess formed inside the opening, and a bottom surface of the recess; A plurality of light emitting modules each having a substrate on which a solid light emitting element is mounted and arranged circumferentially on the bottom surface of the instrument body; facing each of the plurality of light emitting modules and reflecting light emitted from each light emitting module A reflector having a control part to be controlled and disposed in a recess of the instrument body; and disposed in a direction in which the reflected light of the reflector emits so as to integrally cover all of the plurality of reflectors has been the translucent cover member; inner diameter is formed to a larger dimension than the outside diameter dimension of said reflector and said cover member, said instrument body so as to surround the sides of the reflector body and the cover member Gold disposed in the recess Characterized in that it comprises a; and manufacturing of the frame member.

  According to the present invention, it has a reflector for reflecting and controlling the emitted light from a plurality of light emitting elements arranged in the instrument body, and a translucent cover member arranged to cover the plurality of reflectors, By having the frame member that surrounds the reflector and the cover member, it is possible to configure a small and high-intensity lighting apparatus that can obtain the necessary heat dissipation and predetermined light distribution performance without increasing the size.

  In the present invention, the luminaire is preferably applied to downlights, spotlights, and the like that are installed with a predetermined embedded hole size on an installation object such as a ceiling. Various small lighting fixtures for facilities and business use may be configured.

  For example, an instrument body having a light emitting portion disposed on one end side of a cylindrical body is allowed. Moreover, in order to dissipate the heat generated from the light emitting part, it is preferably composed of a heat conductive member made of a metal such as aluminum, copper, iron, etc., having good heat conductivity, but ceramics and high heat conductive resin It may be composed of a synthetic resin such as

  The solid light emitting element is allowed to be composed of a solid light emitting element such as a light emitting diode, a semiconductor laser, or an organic EL. A single light emitting module mounted with a solid light emitting element is generally a matrix in which a large number of solid light emitting elements are arranged in a matrix on a square or rectangular substrate. A part or the whole may be arranged and mounted in a plane in a certain order.

  Since the light emitting modules are distributed and disposed in the instrument body, the generated heat is also dispersed and can be effectively dissipated. At the same time, since the light emitting modules are dispersed, each of the dispersed light emitting modules is provided with a reflecting portion, so that it is possible to reduce the depth of the reflector that controls the light distribution angle. These effective configurations can suppress the increase in size of the instrument.

  The reflector has a reflecting portion that faces each of the plurality of light emitting modules and controls the light emitted from each light emitting module. The reflecting portion includes, for example, a light source side opening facing one light emitting module, In addition, it may have a widened emission side opening for emitting light from the light source, and these may be integrated to form a reflector, or may be individually configured as a reflector. Further, for example, in order to mainly illuminate the center of the room, a reflector for obtaining a light distribution with a relatively small change in luminous intensity over the periphery is allowed. In addition, the light emitting module emits light so as to be inclined from the light source side opening toward the light emitting side opening to form a reflecting surface to reflect light emitted from the light emitting module and to obtain a light distribution to be rotated. It may be formed of a “mortar-shaped” recess having a circular cross section so as to surround the region. Further, for example, the shape may be a “mortar-shaped” recess having a rectangular cross section. Moreover, although it is preferable that the reflective surface is formed by a continuous curved surface, a part of a flat surface may be formed.

  The material of the reflector is integrated with a white synthetic resin having light resistance, heat resistance and electrical insulation, for example, PBT (polybutylene terephthalate), or synthetic resin such as acrylic or ABS in consideration of light reflection performance. You may form in. Moreover, even if the surface is painted white, a metal such as aluminum or silver may be deposited or plated to be processed into a mirror surface or a half mirror surface. Further, it may be made of a metal such as aluminum or copper, and white coating, vapor deposition, plating, or the like may be performed similarly to the above synthetic resin. Furthermore, what gave various patterns etc. may be used.

  According to the first aspect of the present invention, the reflector that controls the reflection of the emitted light from the plurality of light emitting elements disposed in the instrument body, and the translucent cover member that is disposed so as to cover the plurality of reflectors. And having a frame member that surrounds the reflector and the cover member constitutes a small and high-intensity lighting device that can obtain the required heat dissipation and predetermined light distribution performance without increasing the size. be able to.

It is a figure which shows the lighting fixture which concerns on the 1st Embodiment of this invention, (a) is sectional drawing which follows the aa line of FIG. 2, (b) is a cross section which expands and shows the principal part of (a) figure. Figure. The top view which similarly shows a lighting fixture in the state which removed the frame member, the cover member, and the reflector. The bottom view of a lighting fixture. The figure which shows typically the light emitting module of a lighting fixture, (a) is a front view, (b) is sectional drawing which follows the bb line | wire of (a) figure. The lighting fixture is similarly shown, (a) is a top view showing a state in which the frame member and the cover member are removed, and (b) is a sectional view of the reflector. It is a figure equivalent to Drawing 5 in the conventional lighting fixture, (a) is a top view shown in the state where a frame member and a cover member were removed, and (b) is a sectional view of a reflector. Sectional drawing which shows the state which installed the lighting fixture which concerns on the 1st Embodiment of this invention in the ceiling. Similarly, the modification of the lighting fixture which concerns on 1st Embodiment is shown, (a) is sectional drawing which shows the principal part of a 1st modification, (b) is sectional drawing which shows the principal part of a 2nd modification. The experimental data of the lighting fixture which concerns on the 2nd Embodiment of this invention are shown, (a) is a figure which shows experimental conditions, (b) is a graph which shows the relationship between an angle and BCD average brightness | luminance, (c) is opening diameter, and The graph which shows the relationship of a brightness | luminance. The experimental data of the lighting fixture which concerns on the 3rd Embodiment of this invention are shown, (a) is a light distribution curve of a downlight, (b) shows the angle difference when a resident | crew observes the reflector from which a level | step difference differs. FIG.

  Hereinafter, an embodiment of a lighting apparatus according to the present invention will be described with reference to the drawings.

  The luminaire 10 of the present embodiment is a downlight-type luminaire that is installed in an embedding hole having a diameter of about 150 mm, and as shown in FIG. The light emitting module 13 in which the solid light emitting element 12 is mounted is opposed to the light emitting unit 14 and the plurality of light emitting modules arranged in a distributed manner in the instrument body, reflects light in the emission direction, and sets the light distribution angle. The reflector 15 includes a plurality of reflecting portions 15a set at a predetermined angle, a translucent cover member 16 provided on the front surface of the reflector, and a frame member 17 provided so as to surround the reflector.

  The instrument body 11 is a metal having good thermal conductivity in order to enhance heat dissipation. In this embodiment, the instrument body 11 has a substantially circular cylindrical shape made of aluminum die casting, and has an opening 11a on one end side. And the other end is closed to form a bowl-shaped case body, the light emitting portion 14 is housed in a recess 11b formed inside, and a large number of heat radiation fins 11c are integrally formed on the outer peripheral surface and the bottom surface. Is done. In this example, the opening diameter φ1 of the instrument body 11, that is, the diameter of the opening 11a was formed to be about 135 mm (see FIG. 2).

  The solid-state light emitting element 12 is composed of a light emitting diode chip (hereinafter referred to as “LED chip”) in the present embodiment, and the LED chip 12 is a plurality of LED chips having the same performance. The blue LED chip. The LED chip 12 is mounted on a substrate to constitute a light emitting module 13.

  In this embodiment, six light emitting modules 13 each having a light output of 1000 lm in total are used to achieve a light output of 6000 lm in total light necessary as a downlight fixture. Therefore, as shown in FIG. 2, the above six light emitting modules 13 have the same configuration, and the LED chip 12 is mounted on one side (front side) of the substrate 13a and the substrate, and the plan view is square. Thus, a yellow phosphor is provided so as to cover the plurality of LED chips 12.

  As schematically shown in FIG. 4, the substrate 13a constituting each light emitting module 13 is constituted by a thin rectangular aluminum plate having good thermal conductivity in this embodiment. On the surface side of the substrate 13a, a bank portion having a substantially square shape is formed, leaving a margin s1 on one side edge side, and a shallow square accommodating recess 13b is formed. On the bottom surface of the accommodating recess, that is, on the surface of the substrate 13a The plurality of LED chips 12 (blue LED chips) described above are mounted in a substantially matrix shape. The blue LED chips 12 regularly arranged in a substantially matrix form are connected in series by a wiring pattern and bonding wires.

  The housing recess 13b of the first substrate 13 configured as described above is coated or filled with a sealing member 13b1 in which a yellow phosphor is dispersed and mixed, whereby the light emitting module 13 is configured. And while transmitting the blue light radiated | emitted from the blue LED chip | tip 12 mentioned above, a yellow fluorescent substance is excited by blue light, it converts into yellow light, the transmitted blue light and yellow light mix, and white light is mixed. Is emitted from the light emitting module 13. The light emitting surface of the light emitting module 13 in this example is the entire sealing member 13b1 inside the bank, and the area of the light emitting surface is formed to be about 15 mm square.

  As shown in FIG. 2, the light emitting module 13 configured as described above is achieved by dispersing and arranging the light output necessary for the downlight fixture, that is, the total luminous flux of 6000 lm in the fixture body 11. Six light-emitting modules 13 constituting the light-emitting portion 14 are prepared, and six are inserted into the recess 11b from the opening 11a on one end side of the instrument body 11, and are thermally coupled to the bottom surface of the recess. Fixed to. That is, each light emitting module 13 is annularly arranged at substantially equal intervals so that a space S is formed in the center so that light is uniformly emitted from the circular openings 11a of the instrument body 11, in this embodiment. Each of the six light emitting modules 13 is configured such that the longitudinal axis yy is radially distributed at substantially equal intervals with an angle of 60 °.

  Furthermore, each light emitting module 13 is disposed by overlapping a part of the substrate 13a in order to effectively utilize the narrow storage space formed by the recess 11b of the instrument body 11 and prevent the instrument body 11 from being enlarged. That is, as shown in FIG. 1B, a concave fitting portion 11d is formed on the bottom surface of the concave portion 11b that fixes each light emitting module 13. The recessed fitting portion 11d is integrally formed corresponding to one of the bottom surfaces of the recessed portions 11b in the adjacent light emitting modules 13. In other words, every other recessed fitting portion 11d is radially formed at substantially 120 ° angles, and stepped portions 11e adjacent to the recessed fitting portion 11d are radially formed at substantially 120 ° angles. The The concave fitting portion 11d is formed in such a size that the rectangular substrate 13a of the light emitting module 13 can be fitted as it is, and the area of the stepped portion 11e is large enough to mount the rectangular substrate 13a. Formed. The bottom surface of the recessed fitting portion 11d and the surface of the step portion 11e are formed on a flat surface in order to closely fix the substrate 13a. In the figure, t1 is a step size of the recessed fitting portion 11d and the stepped portion 11e, and is set to about 5 mm in this embodiment. That is, the substrates 13a and 13a 'are arranged with a step.

  Then, as shown in FIG. 2, three substrates 13a of the six light emitting modules 13 are fixed to the recessed fitting portion 11d and three are fixed to the step portion 11e. At this time, each substrate 13a is arranged such that the corners of the margin s1 overlap. The substrate 13a fitted in the recessed fitting portion 11d is positioned by the pin 11f, and the substrate 13a ′ placed on the step portion 11e is positioned by the pin 11g. Furthermore, each board | substrate 13a, 13a 'is arrange | positioned so that the notch part formed in the peripheral edge of board | substrate 13a, 13a' may overlap in the center side of an instrument, and this notch part is latched by the pin 11h, and 2 sheets Are simultaneously positioned. If necessary, the concave fitting portion 11d may be interposed through an adhesive, a sheet, or the like (not shown) made of a silicone resin, an epoxy resin, or the like having heat resistance and good thermal conductivity and electrical insulation. And may be adhered to the flat surface of the step portion 11e. As described above, by arranging a part of the substrates 13 a and 13 a ′ in an overlapping manner, a narrow storage space formed by the recess 11 b of the instrument main body 11 can be effectively used, and an increase in the size of the instrument main body 11 is prevented. be able to.

  As described above, the six substrates 13a are formed so that a space S formed of a concave portion is formed in the central portion, in other words, the light emitting module 13 is not disposed in the center of the instrument body, and is arranged in a ring at substantially equal intervals. Further, the light emitting unit 14 is configured by being disposed so that a part of the substrate 13a overlaps. As described above, the light emitting unit 14 is arranged in an annular manner at equal intervals on the instrument body 11 using six light emitting modules 13 having a total luminous flux of 6000 lm necessary for a downlight fixture and a total luminous flux of 1000 lm per sheet. To achieve this.

  In addition, by fixing each light emitting module 13 in close contact with the recessed fitting portion 11d and the stepped portion 11e as described above, the heat generated from the light emitting module 13 is transferred from the aluminum die-cast device body 11 to a large number of heat radiation fins 11c. To dissipate heat to the outside. In particular, by dispersing each light emitting module 13 and disposing it on the instrument main body 11, heat generated from the light emitting module 13 is distributed substantially evenly with respect to the instrument main body 11 without concentrating on the central portion. Heat can be effectively dissipated. Incidentally, as shown in Patent Document 2, when it is configured by one large light emitting module, heat is concentrated on the central portion of the instrument body, and effective heat dissipation cannot be performed.

  Each light emitting module 13 is provided with a wiring connector 13c. The connector 13c of each light emitting module 13 is provided on the center side of the instrument body 11 so as to face the space S at the center. It is done. In addition, a wire insertion hole 11k that penetrates from the center of the instrument body 11 toward the bottom surface is formed on the bottom surface of the space S formed by the recesses, and the lead wires w connected to the connectors 13c of the respective light emitting modules 13 are bundled. As shown in FIG. 3, the wire is pulled out from the wire insertion hole 11 k to the outside through the bottom surface of the instrument body 11. 3 in FIG. 3 is a top plate for closing the electric wire insertion hole 11k. The lead wire w drawn out is sandwiched between the end of the electric wire insertion hole 11k and fixed, thereby fixing the central portion of the instrument body 11. To fix the lead wire tension. Further, the drawn lead wire is connected to the output terminal of a separate power supply unit E. The six light emitting modules 13 are connected in series, and the three connected in series are further connected in parallel. The lead wire w is a harness so that this wiring can be simplified. To form.

  As a result, the plurality of light emitting modules 13 are arranged in an annular manner so as to form a space S in the central portion so as to be distributed substantially evenly. The space S can be used for electrical connection in the plurality of light emitting modules 13, and no special wiring space is required, so that the size of the appliance, particularly the size in the height direction of the appliance, can be suppressed. . Moreover, the excess part of the lead wire w can also be accommodated in the recessed part around the electric wire penetration hole 11k in the space S of the center part. In addition, all the connections between the lead wire w and the substrate 13a can be performed by the connector 13c, so that the wiring becomes easy and the assemblability of the instrument is improved. Furthermore, these connections can be made in the substrate 13a, that is, the space S in which the light emitting module 13 is not disposed, and the connection work is easy and does not hinder heat dissipation of the substrate 13a.

  As shown in FIG. 5, the reflector 15 faces each of the six light emitting modules 13 in the light emitting section 14, reflects the light in the emission direction, and sets the light distribution angle to a predetermined angle. Therefore, it is configured by integrally configuring six individual reflecting portions 15a. The individual reflecting portions 15a form a light source side opening 15b facing the LED chip 12 side, and an expanded emission side opening 15c that emits light from the LED chip 12, and the light source side opening 15b emits light from the light source side opening 15b. A reflecting surface 15d that is continuously inclined toward the opening 15c is integrally formed. The reflecting surface 15d reflects the light emitted from the LED chip 12, and further traverses so as to surround the light emitting region of the LED chip 12 in order to obtain a light distribution to be rotated with relatively little change in luminous intensity. The surface is configured to form a “mortar-shaped” recess having a circular shape. The reflector 15 is configured by providing six individual reflectors 15 a configured as described above corresponding to the respective LED chips 12 of the six light emitting modules 13.

  The reflector 15 is integrally formed in a disc shape with a white synthetic resin having light resistance, heat resistance and electrical insulation, in this embodiment, PBT (polybutylene terephthalate). In this disk, in this embodiment, six individual reflecting portions 15a corresponding to the six light emitting modules 13 are integrally formed on the concentric circle so as to have substantially equal intervals. The reflector 15 is processed into a mirror surface by applying a vapor deposition film made of aluminum over the surface and the light source side opening 15b, the reflection surface 15d, and the emission side opening 15c of each reflection portion 15a.

  The reflector 15 configured as described above is fitted by being dropped into the recess 11 b of the instrument body 11. At this time, the individual reflecting portions 15a of the reflector 15 are respectively opposed to the six light emitting modules 13 arranged in a ring at substantially equal intervals, and the LED chips 12 are mounted in a square shape by the emission side openings 15c. Each light emitting module 13 is fixed by surrounding each light emitting surface and holding down each substrate 13a, 13a '. The reflector 15 is fixed to a mounting boss integrally provided on the back surface side of the reflector 15 by screws inserted from the bottom surface side of the instrument body 11. As shown in FIG. 5B, the height h1 of the reflecting portion 15a ′ corresponding to the light emitting module 13 ′ fixed to the step portion 11e corresponds to the light emitting module 13 fixed to the recessed fitting portion 11d. It is formed so as to be lower than the height dimension h2 of the reflecting portion 15a by the level difference dimension t1 (h2-h1 = t1).

  By providing the reflectors 15 corresponding to the six light emitting modules 13 as described above, it is possible to reflect light in the emission direction and set the light distribution angle to a predetermined angle. That is, as shown in FIG. 5B, the light distribution angle α1 in the LED chip 12 is set by the height h1 of the light-emitting side opening 15c from the light source-side opening 15b of the individual reflecting part 15a. In the case of the present embodiment, the light distribution angle as the target downlight can be set to a medium angle light distribution of about 60 ° (α1 = about 30 °) by the low height dimension h1. Incidentally, as in the prior art, in order to set the medium angle light distribution angle of 60 ° with one large light emitting module, as shown in FIG. 6B, the height dimension h1 in this embodiment is used. The high dimension h3 is required (h1 <h3), the reflector becomes large, and particularly the height dimension becomes large, and it becomes impossible to achieve downsizing of the instrument body. Thus, by dividing and disperse | distributing the light emitting module 13, it becomes possible to make the depth of the reflector which controls a light distribution angle low, and can suppress the enlargement of an instrument. In FIG. 6, which shows the conventional example, the same reference numerals are given to the same parts as in the present embodiment, and the detailed description is omitted.

  The reflector 15 configured as described above is provided with a translucent cover member 16 as shown in FIG. The cover member 16 is for protecting the charging portion of the light emitting module 13, that is, the LED chip 12, by covering the emission side opening 15 c of the reflector 15, and all the six emission side openings 15 c are covered. It is made of an acrylic resin made of a translucent disk with a frost applied so as to cover and prevent glare, and the support leg 16a formed integrally with the acrylic resin is locked to the outer peripheral surface of the reflector 15 Supported by letting. The cover member may be made of transparent resin or transparent or translucent glass.

  Reference numeral 17 denotes a ring-shaped frame member provided so as to surround the reflector 15, and is configured as a ring-shaped lightweight decorative frame in which white metal is applied to a metal having good thermal conductivity, in this embodiment, a steel plate. The inner diameter of the frame member 17 is formed to be slightly larger than the outer diameter of the reflector 15 and the cover member 16 having a disk shape, and the height dimension (depth dimension) is up to the cover member 16 provided on the reflector 15. The reflector 15 and the cover member 16 are surrounded by the inner peripheral surface of the frame member 17, and the outer periphery of the reflector 15 is surrounded by the frame member 17 that is a beautiful white decorative frame. Further, the frame member 17 is integrally formed with a support piece 17a protruding in the inner circumferential direction at the bottom opening thereof, and the support piece 17a is placed on the bottom surface of the recess 11b of the instrument body 11 and is surrounded by screws 17b. Stick around the place. As a result, the aluminum die-cast instrument main body 11 and the frame member 17 made of a steel plate are thermally connected, and the heat generated from the light emitting module 13 is dissipated from the frame member 17. Note that the frame member 17 may be made of an aluminum plate, or may be made of a white synthetic resin having light resistance, heat resistance, and electrical insulation, for example, PBT such as white, similarly to the reflector 15. May be. In FIG. 3, reference numeral 20 denotes three fixtures made of stainless steel plate springs provided at substantially equal intervals on the outer peripheral surface of the instrument body 11.

  As described above, a plurality of divided light emitting modules are distributed and arranged in the main body of the light output necessary for the device, that is, one light emitting module 13 having a light output of 1000 lm in total is used. Thus, the downlight-type lighting fixture 10 having a small size and a large amount of light that achieves the light output of the total luminous flux of 6000 lm required as the downlight fixture is configured.

  As shown in FIG. 7, the downlight-type lighting fixture 10 configured as described above is used by connecting a single or a plurality of them to a ceiling X that is an installation surface using a feeding cable. First, a circular embedding hole 30 is formed at a predetermined position on the ceiling X. The diameter dimension of the embedding hole 30 forms a circular through hole of about 150 mm in this embodiment.

  Next, the lead wire w drawn from the bottom surface of the instrument body 11 is connected to the output terminal of a separate power supply unit E that is connected in advance to a commercial power supply and installed on the ceiling or the like. With the lead wire w connected, the fixture 20 made of a leaf spring of the instrument main body 11 is bent inward by hand and inserted into the embedding hole 30 together with the instrument main body 11, and the projecting rear surface side of the frame member 17 is placed on the ceiling. Abut the surface X to determine the position.

  Release the hand 20 from the fixture 20 in a fixed position. As a result, the leaf spring returns to its original state due to its own elasticity and is pressed against the inner surface of the embedding hole 30, and the instrument body 11 is fixed to the ceiling X by the pressing force. The cut end of the embedding hole 30 is neatly covered with a frame member 17 serving as a decorative frame. At this time, as described above, the instrument main body 11 is suppressed in size, and is configured to be small in size while having a large light quantity and high output. For example, a beam protruding from the ceiling, a heat insulating material, an air conditioner or a cable The upper surface of the instrument body 20 will not hit the duct or the like for installation, and it will not be impossible to install.

  When the downlight-type lighting fixture 10 installed above is turned on, the light emitted from each light emitting module 13 is reflected by the individual reflecting surface 15d formed of the paraboloid of the reflector 15, and the light distribution angle is It is possible to perform illumination with a light distribution characteristic as a downlight that is controlled and has a light distribution characteristic with a relatively small change in luminous intensity over the surroundings, with a relatively bright central part of the room and gradually darkening over the surroundings.

  At this time, six light emitting modules 13 each having a light output of 1000 lm in total are used to illuminate with light output of 6000 lm in total light necessary for a downlight fixture. At the same time, the six light emitting modules 13 are arranged in an annular manner so as to form a space S in the central portion so as to be distributed substantially evenly. Moreover, since the reflected light of the individual reflecting portions 15a is shielded by the reflector 15, it is possible to obtain a desired light distribution angle and at the same time reduce glare.

  Further, the heat generated from the LED chip 12 of each light emitting module 13 is directly transmitted to the bottom surface of the recess 11b in the instrument main body 11 to which the substrate 13a is closely fixed, and further transmitted to the main body side wall having a large surface area. The heat is radiated to the outside through the heat radiation fins 11c. This heat radiation action is arranged in the instrument main body 11 in such a manner that the six light emitting modules 13 are distributed in a substantially uniform manner in a ring shape, so that the heat generated from the LED chip 12 does not concentrate on the center of the bottom surface of the instrument main body 11, Dispersed substantially uniformly with respect to the instrument body 11 and effectively dissipated heat. At the same time, the heat is dissipated from the steel plate frame member 17 fixed to the bottom surface of the recess 11 b of the instrument body 11. With these heat dissipation actions, the heat generated from each LED chip 12 can be dissipated sufficiently effectively.

  As described above, in the present embodiment, six light emitting modules 13 each having a light output of 1000 lm in total are used to achieve a light output of 6000 lm in total light necessary for a downlight fixture.

  By adopting a configuration in which the plurality of divided light emitting modules 13 are distributed and arranged in the instrument main body 11, light is radiated substantially uniformly to the periphery, and heat generated in the light emitting modules 13 is dispersed to the instrument side. Heat can be dissipated. Moreover, since the heat generated from the light emitting module 13 is distributed substantially uniformly with respect to the instrument body 11 without concentrating on the central portion, it can be radiated effectively. By dividing and distributing the light emitting modules 13, it is possible to reduce the depth of the reflector 15 that controls the light distribution angle, and it is possible to suppress an increase in the size of the instrument. By arranging a part of the substrate 13a in an overlapping manner, it is possible to prevent an increase in size of the instrument. Since the plurality of light emitting modules 13 are arranged in an annular manner so as to form a space S at the center, the plurality of light emitting modules 13 can be electrically connected using the space S at the center. Wiring space is unnecessary, and the increase in size of the instrument can be suppressed. By providing the necessary heat dissipation and the prescribed light distribution performance without increasing the size of the fixture, these unique functions and effects provide a small and high-intensity lighting fixture that enables the use of light-emitting modules. I was able to.

  In addition, according to the present embodiment, an excess portion of the lead wire w can be accommodated around the wire insertion hole 11k in the space S of the central portion, and the connection between the lead wire w and the substrate 13a is as follows. All can be performed by the connector 13c, and wiring becomes easy and the assembling property of the instrument is improved. Wiring can be performed in the space S where the light emitting module 13 is not arranged, and the light emitting modules are distributed and arranged in the instrument body so that the wiring work is easy and the heat radiation of the substrate 13a is not hindered. A wide variety of additional effects can be achieved.

  As described above, in this embodiment, the steel plate frame member 17 is fixed to the bottom surface of the recess 11b of the instrument body 11, and the heat generated from the LED chip 12 of each light emitting module 13 is dissipated. As shown to a), the board | substrate 13a of a light emitting module is stuck to the bottom face of the recessed part 11b of an instrument main body, the frame member 17 is mounted on it, and the collar part 15e of the reflector 15 is mounted further on it. And you may comprise so that these may be fastened and fixed with respect to the recessed part 11b of an instrument main body with the screw | thread 11j from the upper surface of the collar part 15e.

  According to this structure, the board | substrate 13a and the frame member 17 of a light emitting module can be inserted | pinched between the reflector 15 and the recessed part 11b of an instrument main body, and also the frame member 17 is the heat | fever of the light emitting module 13 in the near position. Effective heat dissipation can be performed. In addition, since all the parts are sandwiched and fixed, adhesion is improved, and heat shock and assembly are improved.

  Further, as shown in FIG. 8 (b), the frame member 17 is brought into close contact with the back side of the instrument body 11, the substrate 13a of the light emitting module is brought into close contact with the bottom surface of the recess 11b of the instrument body, and the reflector 15 is placed thereon. The flange part 15e may be mounted and may be configured to be fastened and fixed to the frame member 17 provided on the back surface of the instrument main body with a screw 11j from the upper surface of the flange part 15e. In this case, the recess 11b of the instrument body 11 is formed with a low height (a shallow depth).

  According to this structure, the board | substrate 13a and the frame member 17 of a light emitting module can be inserted | pinched between the reflector 15 and the recessed part 11b of an instrument main body, and also the frame member 17 is the heat | fever of the light emitting module 13 in the near position. Effective heat dissipation can be performed. In addition, since all the parts are sandwiched and fixed, adhesion is improved, and heat shock and assembly are improved.

  In the configuration shown in FIGS. 8 (a) and 8 (b), this type of instrument will have a higher output in the future, so that the LED chips will be arranged at a higher density and more effective heat dissipation will be required. A configuration that can effectively transfer heat to these frame members and can effectively dissipate heat is particularly effective. Moreover, although the power supply unit E was comprised separately, it may comprise so that it may provide in the instrument main body 11, and may comprise the instrument of a power supply unit integrated type. In addition, in FIG. 8 which shows a modification, the same code | symbol was attached | subjected to the same part as FIGS. 1-7, and detailed description was abbreviate | omitted.

  In this embodiment, the diameter of the embedding hole 30 is about 150 mm, the total luminous flux of the instrument is 4000 lm or more, a medium angle light distribution, and a plurality of rotationally symmetric optical systems, that is, the small size of the embodiment 1 having the reflector 15. Thus, it was determined how to set the aperture area of the optical system in order to obtain a predetermined medium angle light distribution while suppressing glare in a large amount of downlight type lighting fixture. In this example, the total aperture area of the optical system was set to be 4000 mm 2 to 6000 mm 2 by the experiment described below. Specifically, the opening diameter of the exit side opening 15c in the individual reflecting portion 15a in the reflector 15 was set to 29.5 mm to 36 mm, and six pieces thereof were provided.

  With the above-described configuration, a predetermined medium-angle light distribution can be obtained while suppressing glare in a small and large downlight type lighting fixture having a total luminous flux of 4000 lm or more. That is, in a downlight type instrument having a light emitting module of 800 lm × 6p and 4800 lm and a total luminous flux of 4400 lm, in order to realize a light distribution angle of 60 ° with a reflector, reflection characteristics close to a mirror surface are required. According to the data shown in FIG. 9B, the BCD luminance in the horizontal view has a minimum of about 20000 cd / m 2 at a vertical angle of 55 °. The baffle with a light shielding angle of 30 ° blocks light of 60 ° or more, but the vertical angle of 55 ° cannot be shielded outside the light shielding range of the baffle. 9A is a diagram showing experimental conditions, and the data shown in FIG. 9B is a graph showing the relationship between the angle α and the BCD average luminance (background luminance is 50 [cd / m 2]).

  For this reason, in this embodiment, the down-light type instrument having a total luminous flux of 4000 lm and a light distribution angle of 60 ° is used, and the opening angle of the individual reflector 15a in the reflector 15 is changed at an emission angle of 55 °. The luminance value was determined. As a result, as shown in the graph of FIG. 9C, in order to obtain a luminance of 20000 cd / m 2 at a vertical angle of 55 °, the opening diameter of the reflecting portion 15a must be about 29.5 mm or more. The total area at φ29.5 mm × 6p is 4000 mm 2.

  On the other hand, the diameter of the composite reflector having the embedded hole diameter of about 150 mm (the reflector 15 provided with the 6p individual reflecting portion 15a) is about φ120 mm in consideration of the space required for the fixture and the like, and is the maximum that fits in this. The reflector diameter (opening diameter of the individual reflecting portions 15a) is 36 mm, and the total area at 6p is 6000 mm 2.

  From the above results, it was possible to set the aperture area of the optical system for obtaining a predetermined medium-angle light distribution while suppressing the glare by the total aperture area of the optical system. In particular, as in Example 1, six light emitting modules 13 each having a light output of 1000 lm in total are used to achieve a light output of 6000 lm in total light required as a downlight fixture. This is particularly effective for suppressing the occurrence of glare in a small downlight type lighting apparatus having a large light quantity. In particular, this type of downlight-type lighting fixture in the past has an embedding hole diameter of 150 mm and is up to about 2000 lm. However, when the output of the fixture is increased to a total luminous flux of 4000 lm or more, glare and glare can be felt. In order to suppress these glare and glare, the above configuration is extremely effective.

  In this example, a part (one) of the reflector 15 in Example 1 is displaced along the optical axis xx direction, thereby suppressing glare and glare feeling while obtaining a predetermined medium angle light distribution. To do. Specifically, as shown in FIG. 1B, the reflector 15 provided on the substrate 13a fixed to the recessed fitting portion 11d of the recessed portion 11b in the instrument main body 11 is arranged along the optical axis xx direction. It is configured to be displaced (in the direction opposite to the light emission direction) so that the opening end of the exit side opening 15c is lower than other reflectors, that is, the reflector 15 'fixed to the step portion 11e. (Step t1).

  That is, as shown in FIG. 10 (a), an example of light distribution in a downlight type luminaire having a medium angle light distribution of 60 ° of this type has a large inclination in the vicinity of 30 ° to 50 °. Also, as shown in FIG. 10B, when the ceiling height is 2.4 m, the angle of the reflectors 15 and 15 ′ having different heights as seen from the occupants near the exit angle of 50 ° is A difference of about 0.5 ° occurs (angle α−β≈0.5 °). In the light distribution example of FIG. 10A, the difference of 0.5 ° near the emission angle of 50 ° is 10 to 15% in terms of luminance. That is, for example, when three of the six reflectors 15 are displaced by the step t1 in the optical axis xx direction, the luminance in the optical axis direction decreases by 5 to 7%.

  As a result, as shown in FIG. 9B in the second embodiment, the vicinity of the emission angle of 50 ° is the range where the BCD luminance is the lowest but cannot be shielded by baffle or the like. The luminance could be reduced by displacing 15 in the direction of the optical axis xx, and glare and dazzling feeling could be suppressed while obtaining a predetermined medium angle light distribution. In addition, when diffused by a baffle, φ150m, that is, when the entire diameter of the buried hole was made to shine, medium angle light distribution could not be achieved. However, according to the above configuration, glare and glare were obtained while reliably obtaining predetermined medium angle light distribution. A feeling of feeling can be suppressed.

  In particular, as in the first embodiment, this is a small and large light quantity downlight type lighting fixture that is configured to use a plurality of light emitting modules 13 to achieve the light output of the total luminous flux necessary as a downlight fixture. Is particularly effective for suppressing the occurrence of glare. In particular, this type of downlight-type lighting fixture in the past has an embedding hole diameter of 150 mm and is up to about 2000 lm. However, when the output of the fixture is increased to a total luminous flux of 4000 lm or more, glare and glare can be felt. In order to suppress these glare and glare, the above configuration is extremely effective. In the first embodiment, the light emitting modules 13 are arranged on the same circumference. However, in this embodiment, the case where the light emitting modules 13 are arranged on different circumferences has been described.

  In this embodiment, a downlight-type lighting fixture having a small diameter and a large amount of light having a diameter of the embedded hole 30 of about 150 mm and a total luminous flux of 20000 lm or more is required to have a required heat dissipation and a predetermined light distribution without increasing the size. And how to set the light emitting area in the light emitting section 14 capable of obtaining the target total luminous flux was obtained.

  In the present example, as shown below, the ratio of the total area of the light emitting surface of the light emitting module to the opening area of the instrument body 11 was set to be 4.25% to 15%. If the area is further increased, an area for heat dissipation is further required, the instrument body, in particular, the instrument height becomes too large to be miniaturized, and it becomes difficult to obtain an appropriate light distribution angle. Further, if the area is smaller than this, it becomes difficult to obtain a desired total luminous flux. For this reason, when considering these factors, the range of 4.5% to 15% is preferable. By the above, in a small and large downlight type lighting fixture having a total luminous flux of 2000 lm or more, the required heat dissipation and a predetermined light distribution can be obtained without increasing the size, and the desired total luminous flux can be obtained. Is possible.

  The ratio of the area of the light emitting part to the opening area of the above-described instrument body was obtained as follows. That is, the opening diameter φ1 (see FIG. 2) of the instrument for the embedded hole 30 with φ150 mm is about 104 mm and the area is about 8491 mm2.

  In addition, as a light source in a conventional LED downlight having a total luminous flux of about 2000 lm, an SMD type LED chip having a diameter of about 4.2 mm is used, for example, 26p. In this case, the total area, that is, the area of the light emitting portion Is about 360 mm @ 2 and the ratio of the instrument opening area to the area is about 4.24%.

  In addition, the downlight-type lighting fixture 10 according to the first embodiment can achieve a total luminous flux of about 6000 lm to about 9000 lm, and one light emitting module 13 uses 6 p with a light emitting surface of about 15 mm square. The total area, that is, the area of the light emitting surface is about 1350 mm 2, and the opening diameter φ1 of the device is 108 mm, the area of the device opening is 9156 mm 2, and the ratio of the total area of the light emitting surface to the opening area of the device is about 15%.

  Considering the diameter of the embedded hole, in the case of an instrument for an embedded hole of φ150 mm, the instrument open end on the side from which light is emitted is about φ135 mm. The optimum range of the ratio of the total area of the light emitting surface of the light emitting module 13 to the area is 2.5% to 9.5%.

  From the above results, it was possible to obtain the light emission area in the light emitting unit 14 that can obtain the desired total luminous flux without obtaining an increase in size and obtaining the necessary heat dissipation and predetermined light distribution. In particular, as in Example 1, six light emitting modules 13 each having a light output of 1000 lm in total are used to achieve a light output of 6000 lm in total light required as a downlight fixture. In the configuration to dissipate and dissipate the heat of the LED chip without concentrating it at one place, the necessary heat radiation and a predetermined light distribution can be obtained without increasing the size of the device, and the desired total luminous flux can be obtained. In order to obtain this, it is particularly effective when setting the light emitting area of each light emitting module to be dispersed and the total light emitting area. In particular, this type of downlight-type lighting fixture in the past has a buried hole diameter of 150 mm and was up to about 2000 lm. However, when the output of the fixture is increased so that the total luminous flux exceeds 4000 lm, the temperature of the LED chip will increase. As the temperature rises, it becomes necessary to increase the size of the instrument for heat dissipation, and the desired light distribution control becomes difficult. The above configuration is extremely effective in order to suppress the increase in size of the instrument for heat dissipation and light distribution control.

  In FIGS. 8 to 10 showing the second and third embodiments, the same portions as those in FIGS. 1 to 7 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Further, other configurations, functions, effects, modifications, and the like in the second, third, and fourth embodiments are the same as those in the first embodiment except for items that are specifically defined. The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention. For example, all the above embodiments have been described with respect to the downlight, but the shape of the appliance may be rectangular or square, or may be applied to a directly attached appliance instead of being embedded in a ceiling or the like.

DESCRIPTION OF SYMBOLS 10 Lighting fixture, 11 Appliance main body, 12 Solid light emitting element, 13 Light emitting module, 13c Connector, 14 Light emission part, 15 Reflector, 16 Cover member, 17 Frame member, S space

Claims (2)

An instrument body composed of an opening provided on one end, a recess formed inside the opening, and a thermally conductive member having a bottom surface of the recess;
A plurality of light emitting modules having a substrate on which a solid light emitting element is mounted, and arranged circumferentially on the bottom surface of the instrument body;
A reflector that faces each of the plurality of light emitting modules and has a reflective portion that controls reflection of light emitted from each light emitting module, and is disposed in a recess of the instrument body;
A translucent cover member disposed in a direction in which reflected light of the reflector emits so as to integrally cover all of the plurality of reflectors;
Is formed to a larger dimension than the outside diameter dimension of the inner diameter the reflector body and the cover member, said reflector and said cover member said instrument metal wherein disposed in the recess of the body so as to surround the side of the A frame member;
The lighting fixture characterized by comprising.   The lighting device according to claim 1, wherein the plurality of light emitting modules are arranged so as to surround an insertion hole formed in a central portion of the device main body.

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