TWI509193B - Luminaire - Google Patents

Description

Lighting fixture

Embodiments of the present invention relate to a lighting fixture using a light-emitting element such as a light emitting diode (LED) as a light source.

Recently, with the increase in output, efficiency, and popularization of LEDs, lighting fixtures that can be expected to have a long life, which are used indoors or outdoors using LEDs as light sources, have been developed.

For example, in a lighting fixture for a general house, an adapter is electrically and mechanically connected to a ceiling body provided on an appliance mounting surface such as a ceiling surface, and the fixture body is attached thereto. An adapter having a light source portion that uses an LED as a light source. Such a lighting fixture illuminates the room by the light irradiated from the light source unit.

On the other hand, a light-emitting element such as an LED generates heat due to lighting, and as its temperature rises, the output of light decreases, and the durability is also shortened. Therefore, in a lighting fixture using a solid-state light-emitting element such as an LED or an electroluminescence (EL) element as a light source, it is necessary to suppress the temperature rise of the light-emitting element to prolong the durability or improve the luminous efficiency.

Further, in the lighting fixture, a lighting device connected to the light source unit is provided. The lighting device includes a circuit component and has a function of supplying power to the light source unit to perform lighting control of the light emitting element.

Prior technical literature

Non-patent literature

Non-Patent Document 1: LED Ceiling Light: Sharp [Internet Search, July 22, 2011] (http://www.sharp.co.jp/led_lighting/ceiling/)

However, in the lighting fixture as described above, the heat generated from the light-emitting elements in the light source unit and the heat generated from the heat-generating components such as semiconductor components or resistive elements in the circuit components of the lighting device interfere with each other. Excessive temperature rise of the light-emitting elements and circuit components may occur.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a lighting fixture capable of suppressing mutual thermal interference between a light-emitting element in a light source unit and a circuit component in a lighting device.

A lighting fixture of an embodiment of the present invention includes a mounting portion for mounting to an appliance mounting surface.

Further, the lighting fixture includes: a light source unit having a plurality of light-emitting elements disposed as a light source disposed around the mounting portion, directing light emitted from the light-emitting element toward a front surface side; and a lighting device that performs the light source portion The lighting control includes a circuit component disposed around the mounting portion and inside the light-emitting element, and is disposed to be spaced apart from the back side of the light source portion by an isolation distance.

(effect of utility model)

According to an embodiment of the present invention, it is possible to provide a lighting fixture capable of suppressing mutual thermal interference between a light-emitting element in a light source section and a circuit component in a lighting device.

In order to make the above features and advantages of the present invention more obvious, the following The embodiments are described in detail with reference to the accompanying drawings.

Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 8 . 1 to 6 and 8 show a lighting fixture, and Fig. 7 shows a light source unit and a lighting device. In each of the drawings, the wiring connection relationship by a wire or the like is omitted. In addition, the same portions are denoted by the same reference numerals, and overlapping description will be omitted.

The luminaire according to the present embodiment is an illuminating device for a general house that is attached to a ceiling lamp holder main body, and illuminates the room by light emitted from a light source unit having a plurality of light-emitting elements mounted on the substrate. The top base body is provided on the appliance mounting surface and serves as a wiring harness.

The lighting fixture includes an appliance body 1, a light source section 2, a lighting device 3, and a center member 4. Further, the lighting fixture includes a mounting portion 5, a photo sensor 6, a globe 7, a cover member 8, an indirect light source portion 9, and an elastic member 10. Further, the lighting fixture includes an adapter A that is electrically and mechanically coupled to the ceiling holder main body Cb, and the ceiling holder main body Cb is provided on the ceiling surface C as an appliance mounting surface (see FIG. 8). Such a lighting fixture is formed into a spherical circular outer appearance, and the front surface side is used as a light irradiation surface, and the back surface side is used as a mounting surface to the ceiling surface C. These constituent elements will be described below in order.

As shown in FIG. 2 to FIG. 6 , the luminaire main body 1 is a heat-conducting chassis formed of a flat plate of a metal material such as a cold-rolled steel sheet, and has a circular opening 11 formed at a substantially central portion thereof. The opening 11 is provided with a mounting portion 5 to be described later. One of the circular shapes of the opening 11 The portion protrudes outward and is formed into a shape substantially equal to the outer shape of the mounting portion 5.

A protruding portion 12 is formed on the outer peripheral side of the opening 11, and the protruding portion 12 has a quadrangular shape and the corner portion has an R shape and protrudes toward the back side. Further, on the outer peripheral side of the protruding portion 12, a circular annular projecting portion 13 that protrudes toward the front surface side is formed. Further, on the outer peripheral side of the protruding portion 13, a circular annular projecting portion 14 is formed so as to be continuous with the protruding portion 13 in the radial direction, and the protruding portion 14 protrudes toward the back side, in other words, in front. A concave portion is formed on the surface side.

In the recess formed by the protruding portion 14, a cover-receiving 75 that detachably mounts the globe 7 is disposed. These protruding portions 12, 13, and 14 mainly function as attachment portions of members attached to the chassis, and have a function of reinforcing the strength of the chassis or a function of increasing the heat dissipation area.

Further, the body 1 corresponds to the chassis in the present embodiment, but may be referred to as a case, a reflector, or a base. In general, the body 1 refers to a member or a portion in which the light source unit 2 is directly or indirectly disposed, and is not particularly limited.

As shown in FIGS. 2, 4, 6, and 8, the light source unit 2 includes a substrate 21 and a plurality of light-emitting elements 22 mounted on the substrate 21. The substrate 21 is disposed such that four arcuate substrates 21 having a predetermined width dimension are butted together, and are formed in a substantially circular shape as a whole. In other words, the substrate 21 formed in a substantially annular shape as a whole includes four divided substrates 21 .

By using the divided substrate 21 as described above, it is possible to absorb heat shrinkage by the divided portion of the substrate 21 to suppress deformation of the substrate 21. In addition, it is preferred to The substrate 21 is divided into a plurality of pieces, but a single substrate which is integrally formed into a substantially annular shape may be used.

The substrate 21 includes a flat plate of a glass epoxy resin (FR-4) as an insulating material, and a wiring pattern is formed on the surface side by a copper foil. The light emitting element 22 is electrically connected to the wiring pattern. Further, on the wiring pattern, that is, on the surface of the substrate 21, a white resist layer functioning as a reflective layer is applied.

Further, when the material of the substrate 21 is an insulating material, a ceramics material or a synthetic resin material can be applied. In addition, when it is made of a metal, the base substrate made of metal is laminated on one surface of the base plate having excellent heat conductivity and excellent heat dissipation properties such as aluminum.

The light-emitting element 22 is an LED and is a surface mount type LED package. The LED package is mounted over a plurality of rows along the circumferential direction of the plurality of annular substrates 21, and in the present embodiment, it is mounted over three rows on substantially concentric circles having different radii. In other words, the column on the inner circumference side, the column on the outer circumference side, and the row on the inner circumference side and the column on the outer circumference side are attached.

The LED package generally includes an LED chip disposed in a cavity formed of ceramic or synthetic resin, and a mold for molding an epoxy resin or a silicone resin. A photo-resin seals the LED chip.

For the LED package mounted on the column on the inner circumference side and on the column on the outer circumference side, an LED package in which the illuminating color is 昼 white (N) and the bulb color (L) is used. The LED packages are alternately arranged and arranged on the circumference at substantially equal intervals. The LED chip is an LED chip that emits blue light. A phosphor is mixed in the light-transmitting resin, and a yellow phosphor is mainly used in order to emit white light (N) and bulb color (L), and the yellow phosphor emits light and blue light exists. The yellow light of the complementary color relationship.

For the LED package mounted on the middle column, an LED package that emits red (R) light, green (G) light, and blue (B) light is used. Therefore, the LED chips are respectively LED chips emitting red light, green light, and blue light, and these LED chips are sealed by a light transmissive resin for molding.

These red (R) light, green (G) light, and blue (B) light LED packages are continuously empty in the order of red (R), green (G), and blue (B) on the circumference. Open at roughly equal intervals.

In addition, the arrangement of red (R), green (G), and blue (B) in the LED package is not specific, and may be in a different order, for example, green (G), red (R), and blue ( B) The order is arranged. Further, the adjacent LED packages are preferably provided with LED packages of different illuminating colors, but are not particularly limited. As an example, two of the same colors may be arranged in succession as in red (R), red (R), green (G), green (G), blue (B), and blue (B).

In this way, a plurality of light-emitting elements 22 having a bluish white (N) light and a bulb color (L) light are arranged in a row on a substantially concentric circle having different radii, and a circumference of a circle having substantially the same center as the circle is arranged. Red (R) light, green (G) light, and blue (B) are arranged in a row between the rows of the light-emitting elements 22 of the hair white (N) light and the light bulb color (L) light. ) more light Light-emitting elements 22.

Therefore, a plurality of light-emitting elements 22 having different luminescent colors are disposed, that is, hair white (N) light, light bulb color (L) light, red (R) light, green (G) light, blue ( B) Light-emitting elements 22, therefore, by mixing them, the range of light colors that can be expressed is wide, and by adjusting the output of the light-emitting elements 22, it is possible to appropriately color the light colors.

Further, the LED can mount the LED chip directly on the substrate 21, and a bullet-type LED can also be mounted. The mounting method or form is not particularly limited.

As shown in FIGS. 4 and 6 , the light source unit 2 configured in this manner is located on the front surface side of the main body 1 and around the opening 11 , in other words, around the mounting portion 5 to be described later, and the mounting of the light-emitting element 22 . The surface is disposed toward the front surface side, that is, toward the downward irradiation direction. Moreover, the back surface side of the substrate 21 is attached to the inner surface side of the main body 1 by a fixing mechanism such as a screw. Therefore, the substrate 21 is thermally coupled to the body 1, and heat from the substrate 21 is conducted from the back side to the body 1 and is radiated.

Further, the substrate 21 may be disposed directly to the main body 1 or may be indirectly attached via another member, and the arrangement form thereof is not particularly limited.

As shown in FIGS. 2 and 6, a light source unit cover 25 is disposed on the front surface side of the light source unit 2. The light source unit cover 25 includes, for example, an insulating transparent synthetic resin such as polycarbonate or acryl resin, and is integrally formed in a substantially annular shape along the arrangement of the light-emitting elements 22, and Covering the entire substrate 21 with the light-emitting element 22 included It is equipped in a face-to-face manner.

Therefore, the light emitted from the light-emitting element 22 is transmitted through the light source unit cover 25. Moreover, since the entire surface of the substrate 21 is covered, the charging portion is covered by the light source unit cover 25, and insulation is ensured. Further, the light source unit cover 25 is in contact with the body 1 and is attached by screwing, so that heat from the body 1 is conducted and emitted.

As shown typically in FIGS. 3, 6, and 7, the lighting device 3 includes a circuit board 31 and circuit components 32 mounted on the circuit board 31. The circuit board 31 is formed in a substantially rectangular shape by a glass epoxy resin (FR-4) or the like, and a notch portion 31a is formed in the center portion. The notch portion 31a has a circular shape and is formed by continuously cutting a part thereof so as to protrude outward. The notch portion 31a is a portion into which the mounting portion 5 to be described later is inserted.

Therefore, the circuit board 31 is formed in a plate shape so as to surround the periphery of the center portion, and the circuit component 32 is attached to the front surface side. Specifically, on the circuit board 31, a circuit component 32 necessary for lighting control of the light-emitting element 22 is mounted around the notch portion 31a, and for example, a control integrated circuit (IC) and a resistance element are mounted. , transformers, switching transistors, constant voltage diodes, full-wave rectifiers, capacitors, etc.

In the vicinity of the notch portion 31a, a heat generating component 32H having a relatively large amount of heat generation such as a control IC, a resistor element, or a transformer in the circuit component 32 is mounted, and a circuit component having a relatively small heat generation amount is attached to the outer peripheral side. .

On the circuit board 32, electrically connected to the adapter A side, and via Adapter A is connected to a commercial AC power source. Therefore, the lighting device 3 receives the AC power supply to generate a DC output, and supplies the DC output to the light-emitting element 22 via a wire to perform lighting control of the light-emitting element 22.

Such a lighting device 3 is attached to the lighting device cover 35 and covered, and is disposed on the back side of the main body 1. At this time, the circuit board 31 mounts the circuit component 32 toward the front surface side (upper and lower sides in the drawing).

The lighting device cover 35 is formed in a short rectangular shape having a substantially rectangular shape by a metal material such as a cold-rolled steel plate, and the side wall 35a is inclined so as to expand toward the front surface side, and an opening 35c is formed in a central portion of the rear surface 35b. .

As shown in FIG. 3, FIG. 5, and FIG. 6, the lighting device cover 35 is placed on the front surface side flanges of the main body 1, that is, the projections 12 of the chassis, and is screwed to be thermally coupled. Install it.

As shown in FIGS. 2, 4, and 6, the center member 4 is made of a synthetic resin material such as polybutylene terephthalate (PBT) resin and is formed into a substantially short cylindrical shape. The central portion has an opening 41 facing the ceiling holder main body Cb. Further, an annular space portion 42 is formed around the opening 41, and a photosensor 6 to be described later is disposed in the space portion 42. Further, a light receiving window 43 facing the light receiving portion of the photo sensor 6 is formed on the front surface wall of the center member 4.

The center member 4 configured in this manner is mainly attached as shown in FIG. 6, and the flange on the back side is screwed to the chassis via the light source unit cover 25. In addition, the center member 4 may be directly or indirectly mounted to the chassis, and the specific mounting structure thereof is not limited.

The mounting portion 5 is an adapter guide that is adapted The member that is inserted and engaged by the device A is a member for attaching the lighting fixture to the ceiling surface C. As shown in FIGS. 3 and 6, the adapter guide portion is formed in a substantially cylindrical shape, and an engagement opening 51 through which the adapter A is inserted and engaged is provided at the center portion. The adapter guide portion is disposed corresponding to the opening 11 formed in the central portion of the body 1.

Further, the mounting portion 5 is not necessarily a member called an adapter guiding portion or the like. For example, the opening formed in the main body 1 or the like may mainly be a member or a portion that faces the ceiling holder main body Cb as a wiring device and engages the adapter A.

As shown in FIG. 6, the photo sensor 6 includes an illuminance sensor, and includes a sensor element such as a photo diode, and operates to detect the surrounding brightness and output a detection signal. Thereby, when the surroundings are bright, the light source unit 2, that is, the light-emitting element 22, is dimmed (dimmed) and turned on.

The photo sensor 6 is mounted on a substrate, and is disposed so as to face the light receiving portion 43 so as to face the light receiving window 43 and be attached to the space portion 42 of the center member 4.

The shade 7 is formed into a substantially circular shape by a light-transmissive material having a light-transmissive property such as an acrylic resin and having diffusibility, and a circular opening 71 is formed in the center portion. Further, a shade decorative frame 7a is formed on the outer peripheral portion of the globe 7, and the shade decorative frame 7a is formed of a transparent material containing acrylic resin or the like.

Further, the shade 7 is detachably attached to the outer peripheral edge portion of the main body 1 so as to cover the front surface side of the main body 1 including the light source unit 2. Specifically, by rotating the lamp cover 7, the lamp cover provided on the lamp cover 7 is buckled. The snap-in 74 is attached to the cover by a snap 75 which is provided in the recess formed by the projection 14 of the body 1.

Further, when the lamp cover 7 is removed, the lamp cover 7 is rotated in a direction opposite to the mounting time to release the engagement between the lamp cover mounting buckle 74 and the lamp cover receiving buckle 75, so that the lamp cover 7 can be detached.

Further, the shade 7 is preferably detachably attached to the outer peripheral edge portion of the main body 1. However, the cover 7 may be fixed to the main body 1 by a fixing mechanism such as a screw. This is because, in the lighting fixture that uses the light-emitting element 22 as a light source and can be expected to have a long life, it is necessary to replace the light source for maintenance or to clean the inside.

Further, the distance between the light source unit cover 25 and the lamp cover 7 is set to 20 mm to 60 mm, preferably set to 30 mm to 50 mm. Thereby, the uniformity of the irradiation light becomes good, and the heat conducted from the main body 1 to the light source unit cover 25 is efficiently dissipated via the globe 7.

Further, a polyolefin sheet or the like having thermal conductivity may be attached to the inner surface side of the globe 7. At this time, heat dissipation from the globe 7 can be improved.

As shown in FIGS. 2 and 6, the cover member 8 is formed into a circular shape from a material such as a transparent acrylic resin. The cover member 8 is attached to the front surface wall of the center member 4 corresponding to the opening 71 of the globe 7, and is disposed to cover and close the opening 41 of the center member 4. Further, a circular transmissive portion 81 that faces the light receiving window 43 of the photosensor 6 is formed on the cover member 8.

Further, it is preferable that at least the transmissive portion 81 is left on the front surface side of the cover member 8 to attach a opaque film material or the like.

The indirect light source unit 9 is disposed on the back side of the main body 1 and mainly has a function of illuminating the ceiling surface. As shown in FIGS. 3, 5, and 6, the indirect light source unit 9 is disposed around the mounting portion 5 and is provided with a plurality of substrates 91 and a plurality of light-emitting elements 92 mounted on the substrate 91.

The substrate 91 is formed into a substantially rectangular flat plate, and the light-emitting elements 92 are arranged in a line shape along the longitudinal direction of the substrate 91.

The substrate 91 on which the light-emitting element 92 is mounted is attached to four places on the side wall 35a of the lighting device cover 35. At this time, the lighting device cover 35 is formed in a substantially quadrangular shape, and the substrate 91 is attached to the linear flat surface on the side wall 35a, so that the mounting can be stably performed.

Further, since the side wall 35a of the mounting portion constituting the substrate 91 is formed in an inclined shape that is expanded toward the front surface side, the substrate 91 is directed obliquely upward, that is, in the ceiling surface direction, and the light emitted from the light-emitting element 92 is directed toward the ceiling surface direction. Irradiation is performed.

Further, each of the indirect light source units 9 is covered by a box-shaped translucent cover 93.

The light-emitting element 92 is an LED package similar to the light source unit 2 and is a surface mount type LED package. Further, the light-emitting element 92 is connected to the lighting device 3 and is controlled by lighting.

The elastic member 10 is attached to the vicinity of the installation position of the plurality of indirect light source units 9. The elastic member 10 is a member that is disposed between the ceiling surface C and the ceiling surface C in a state where the lighting fixture is attached to the ceiling surface C as the appliance mounting surface (see FIG. 8 ).

Specifically, the elastic member 10 is a metal spring member including a material such as stainless steel, and is attached to the back side of the lighting device cover 35 in accordance with the attachment position of each indirect light source unit 9 . The elastic member 10 is formed by bending a horizontally long rectangular leaf spring, and has a fixing portion 10a at a central portion thereof, and an extending portion is formed to extend obliquely upward (back side) from both sides of the fixing portion 10a. 10b, on the front end side thereof, a contact portion 10c having a quadrangular shape is formed.

Further, a screw through hole is formed in the fixing portion 10a, and the elastic member 10 is fixed to the back side of the lighting device cover 35 by a mounting screw that penetrates the screw through hole and is screwed into the back side of the lighting device cover 35.

A plurality of, that is, four such elastic members 10 all use the same form and have the same elastic force.

In the fixed state of the elastic member 10, as schematically shown in Fig. 6, the elastic member 10 disposed on the back side of the lighting device cover 35 can be supported by the fixing portion 10a toward the front surface side side with the action of the spring ( The direction of the arrow is shown to be elastically deformed.

As shown in Fig. 8, the adapter A is electrically and mechanically connected to a portion of the ceiling holder main body Cb provided on the ceiling surface C by a hook provided on the upper surface side, and has a substantially cylindrical shape and a peripheral wall. A pair of locking portions A1 are provided on both sides so as to always protrude toward the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating the lever provided on the lower surface side. Further, a cord (not shown) connected to the lighting device 3 is led out from the adapter A, and is connected to the lighting device 3 via a connector.

In the lighting fixture configured in this manner, the arrangement relationship between the light source unit 2 and the lighting device 3 will be described with reference to FIGS. 4, 6, and 7. In addition, FIG. 7 is an explanatory view showing the positional relationship between the light source unit 2 and the lighting device 3 in a planar manner.

The light source unit 2 is configured by mounting a plurality of light-emitting elements 22 on the circumference of a substantially annular substrate 21 . Further, the substrate 21 is attached by thermally bonding the back side to the body 1. Therefore, the plurality of light-emitting elements 22 are disposed around the mounting portion 5, and specifically, as shown in FIGS. 4 and 7, are disposed so as to surround the periphery of the mounting portion 5 in plan view.

On the other hand, as shown in FIG. 6, the lighting device 3 is disposed on the back side of the main body 1, and is attached to the lighting device cover 35 at an isolation distance d from the light source unit 2 in the back surface direction. Further, the circuit component 32 is disposed so as to surround the periphery of the mounting portion 5, and as shown in FIG. 7, is located inside the plurality of light-emitting elements 22 arranged on the circumference, and the mounting portion 5 is inserted through the slit of the circuit substrate 31. Part 31a.

Further, in the vicinity of the mounting portion 5, the heat generating component 32H having a relatively large amount of heat generation in the circuit component 32 is disposed.

Therefore, the light-emitting element 22 in the light source unit 2 and the circuit component 32 in the lighting device 3 are disposed at an isolation distance d in the back surface direction, and the circuit component 32 is located inside the light-emitting element 22. In other words, the light-emitting element 22 and the circuit component 32 are arranged in a staggered manner in both the vertical direction (front-back direction) and the horizontal direction (radial direction). Further, the heat generating component 32H in the circuit component 32 is disposed away from the light emitting element 22.

Therefore, the light-emitting element 22 and the circuit component 32 are thermally separated. This makes it possible to suppress mutual thermal interference of heat generated from the light-emitting element 22 and the circuit component 32.

Further, since the light-emitting element 22 and the circuit component 32 are disposed around the mounting portion 5, they can be configured in a compact manner. Further, since the lighting device 3 is disposed on the back side of the main body 1, the range of light emitted from the light source unit 2 is not narrowed, and a predetermined light distribution range can be secured.

Next, an installation state in which the lighting fixture is attached to the ceiling surface C will be described with reference to Fig. 8 . First, the adapter A is electrically and mechanically connected to the ceiling holder main body Cb previously provided on the ceiling surface C. In the state in which the cover member 8 of the lighting fixture is disassembled, on the one hand, the engaging opening 51 of the adapter guiding portion is aligned with the adapter A, and on the other hand, against the elastic force of the elastic member 10, the appliance body 1 is pushed up by hand from below until the adapter A The locking portion A1 is surely engaged with the engagement opening 51 of the adapter guide portion to perform the mounting operation.

Next, the cover member 8 is attached to cover and close the opening 41 of the central portion of the center member 4 facing the ceiling holder main body Cb.

In this state, the elastic member 10 is elastically deformed, and the abutting portion 10c elastically abuts against the ceiling surface C. Further, the abutting portion 10c can be in contact with the ceiling surface C in a substantially parallel plane or in such a manner that the front end portion slightly faces in the vertical direction.

Therefore, the elastic member 10 is elastically deformed in the compression direction between the back side of the fixture body 1, that is, between the back side of the lighting device cover 35 and the ceiling surface C, and the luminaire main body 1 becomes a spring at the elastic member 10. It is in a state of being reliably held and mounted on the ceiling surface C.

More specifically, the distance between the ceiling surface C and each of the indirect light source units 9 can be kept constant by the action of the elastic member 10, and the emission angle of the light irradiated from each of the indirect light source units 9 can be made constant. As a result, it is possible to stabilize the light distribution characteristics, and it is possible to efficiently illuminate the ceiling surface C for indirect illumination. Further, since the elastic member 10 is disposed in the vicinity of the indirect light source unit 9 and is disposed in the vicinity thereof, it is expected that the fixing of the interval between the ceiling surface C and each of the indirect light source units 9 is more sure.

Further, when the lighting fixture is removed, the cover member 8 is removed, and the operating lever provided in the adapter A is operated by the opening 41 of the center member 4 to release the engagement of the locking portion A1 of the adapter A, thereby being detachable.

When electric power is supplied to the lighting device 3 in a mounted state in which the lighting fixture is attached to the ceiling surface C, the light-emitting element 22 is energized via the substrate 21 in the light source unit 2, and each of the light-emitting elements 22 is turned on. The light emitted from the light-emitting element 22 toward the front surface side passes through the light source unit cover 25, is diffused through the globe 7, and is transmitted to the outside. Therefore, the lower side can be illuminated within a prescribed light distribution range.

At the same time, when the indirect light source unit 9 is energized, the light-emitting elements 92 are turned on, and the light emitted obliquely upward from the light-emitting element 92 passes through the translucent cover 93 and is radiated from the periphery of the adapter guiding unit 5. The way is mainly to the ceiling. Therefore, the ceiling surface becomes bright, and the brightness of the space can be improved.

At this time, stabilization of the light distribution characteristics of the light irradiated from the indirect light source unit 9 can be achieved, and effective indirect illumination can be performed.

When the light-emitting element 22 is used as a light source in the light source section 2 In the case where the light emitted from the light-emitting element 22 has high directivity, the light distribution range tends to be narrow. However, by providing the indirect light source unit 9 on the back side of the main body 1 as in the present embodiment, the brightness of the space can be improved. sense. Therefore, the provision of the indirect light source unit 9 is effective as a means for setting the light source of the light source unit 2 as the light-emitting element 22.

Further, the light source unit 2 and the indirect light source unit 9 control the lighting state by the photo sensor 6 that detects the surrounding brightness and outputs a detection signal.

Since the back side of the substrate 21 is thermally bonded to the body 1, heat generated from the light-emitting element 22 is efficiently conducted to the body 1 and dissipates heat over a large area. Moreover, since the protrusions 12, 13, and 14 are formed in the main body 1, the heat dissipation area can be increased, and the heat dissipation effect can be further improved.

In addition to this, the lighting device cover 35 is placed on the protruding portion 12 of the main body 1. Therefore, heat is conducted from the main body 1 to the lighting device cover 35 to promote heat dissipation.

On the other hand, the heat generated from the lighting device 3 is mainly radiated by the convection of the space in the lighting device cover 35.

At this time, since the light-emitting element 22 and the circuit component 32 are disposed apart from each other in the back surface direction by the isolation distance d, and the circuit component 32 is located inside the light-emitting element 22, it can be disposed in a thermally separated manner, thereby suppressing mutual thermal interference. . Therefore, excessive temperature rise of the light-emitting element 22 and the circuit component 32 can be suppressed.

Further, since the heat generating component 32H in the circuit component 32 is disposed away from the light emitting element 22, mutual thermal interference can be more effectively suppressed.

Moreover, heat generated from the light-emitting element 92 of the indirect light source portion 9 is derived from The back side of the substrate 91 is conducted to the side wall 35a of the lighting device cover 35, and is further conducted to the elastic member 10 and is radiated.

As described above, according to the present embodiment, it is possible to provide a lighting fixture capable of suppressing mutual thermal interference between the light-emitting elements in the light source section and the circuit components in the lighting device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1‧‧‧ Appliance body (underframe)

2‧‧‧Light source department

3‧‧‧Lighting device

4‧‧‧ central components

5‧‧‧Installation Department (Adapter Guide)

6‧‧‧Light sensor

7‧‧‧shade

7a‧‧‧shade decorative frame

8‧‧‧ Cover member

9‧‧‧Indirect light source department

10‧‧‧Flexible components

10a‧‧‧Fixed Department

10b‧‧‧Extension

10c‧‧‧Apartment

11, 35c, 41, 71‧‧‧ openings

12, 13, 14‧‧ ‧ protruding parts

21, 91‧‧‧ substrate

22, 92‧‧‧Lighting elements (LED)

25‧‧‧Light source cover

31‧‧‧Lighting device substrate

31a‧‧‧Incision Department

32‧‧‧ circuit parts

32H‧‧‧Fever parts

35‧‧‧Lighting device cover

35a‧‧‧ side wall

35b‧‧‧back wall

42‧‧‧ Space Department

43‧‧‧light window

51‧‧‧Kate

74‧‧‧shade mounting buckle

75‧‧‧The lampshade is buckled

81‧‧‧Transmission Department

93‧‧‧Translucent cover

A‧‧‧ Adapter

A1‧‧‧ card stop

B‧‧‧Blue

C‧‧‧ appliance mounting surface (ceiling surface)

Cb‧‧‧Wiring device (main body of ceiling lamp holder)

D‧‧‧Isolation distance

G‧‧‧Green

L‧‧‧ bulb color

N‧‧‧昼 white

R‧‧‧Red

Fig. 1 is a perspective view showing a lighting fixture according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view showing the front surface side of the lighting fixture according to the embodiment of the present invention.

3 is an exploded perspective view showing the back side of the lighting fixture according to the embodiment of the present invention.

4 is a plan view showing a light fixture and a light source unit cover removed in the lighting fixture according to the embodiment of the present invention.

Fig. 5 is a perspective view showing a back side of the lighting fixture according to the embodiment of the present invention.

Fig. 6 is a longitudinal sectional view showing a lighting fixture according to an embodiment of the present invention.

Fig. 7 is a plan view showing a positional relationship between a light source unit and a lighting device.

8 is a view showing installation of a lighting fixture according to an embodiment of the present invention; A cross-sectional view of the state to the ceiling.

1‧‧‧ Appliance body (underframe)

2‧‧‧Light source department

3‧‧‧Lighting device

4‧‧‧ central components

5‧‧‧Installation Department (Adapter Guide)

6‧‧‧Light sensor

7‧‧‧shade

7a‧‧‧shade decorative frame

8‧‧‧ Cover member

9‧‧‧Indirect light source department

10‧‧‧Flexible components

10b‧‧‧Extension

10c‧‧‧Apartment

11, 41, 71‧‧‧ openings

12, 13, 14‧‧ ‧ protruding parts

21, 91‧‧‧ substrate

22, 92‧‧‧Lighting elements (LED)

25‧‧‧Light source cover

32‧‧‧ circuit parts

35‧‧‧Lighting device cover

42‧‧‧ Space Department

43‧‧‧light window

51‧‧‧Kate

74‧‧‧shade mounting buckle

75‧‧‧The lampshade is buckled

93‧‧‧Translucent cover

A‧‧‧ Adapter

A1‧‧‧ card stop

C‧‧‧ appliance mounting surface (ceiling surface)

Cb‧‧‧Wiring device (main body of ceiling lamp holder)

D‧‧‧Isolation distance

Claims (3)

A lighting fixture, comprising: a mounting portion formed at a center of a chassis and mounted to an appliance mounting surface; and a light source portion including a substrate on which a light source disposed around the mounting portion is mounted a plurality of light-emitting elements, a surface on which the plurality of light-emitting elements are mounted is disposed on a front surface side of the substrate, and a back surface side of the substrate is disposed on a front surface side of the chassis to direct light emitted from the light-emitting element a front surface side; and a lighting device that performs lighting control on the light source portion and has a circuit component mounted on the circuit board of the lighting device, the circuit component being disposed around the mounting portion and in the plurality of The lighting device is disposed inside the light-emitting element, and the lighting device is disposed at an isolation distance toward the back side of the light source portion. The circuit component is attached to the lighting device cover toward the front surface side, and the lighting device cover is mounted. On the back side of the chassis. The lighting fixture according to claim 1, wherein the light source unit is disposed on a front surface side of the chassis having thermal conductivity, and the lighting device is disposed on a back side of the chassis. The lighting fixture according to the first or second aspect of the invention, wherein in the circuit component of the lighting device, a heat generating component is disposed in the vicinity of the mounting portion.