JP2013165079A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of easily suppressing temperature rise of a light-emitting element and uniformalizing an image of light emitted from the light-emitting element, in a simple structure.SOLUTION: A lighting fixture is provided with a fitting part 4 opposed to a wiring fixture Cb arranged on a fixture-fitting face C, a substrate 21 located around the fitting part 4 and with a mounting face arranged to face a front face side, and light-emitting elements 22 which are mounted on the substrate 21 and aligned in a plurality of rows on circumferences of nearly concentric circles of different radiuses or on circumferences of polygons of different sizes having nearly the same center, and arranged shifted in a circumferential direction in the same number for each row between neighboring rows.

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting element such as an LED as a light source.

  In general residential lighting fixtures, an annular fluorescent lamp is used as a main light source, and a cover member (sade) is provided so as to cover the lower side of the annular fluorescent lamp, and the external shape is configured in a round shape. It is popular.

  In recent years, with the increase in output, efficiency, and widespread use of light emitting elements such as LEDs, lighting fixtures for general homes such as those described above that can be expected to have a long life using light emitting elements as light sources have been developed. .

  On the other hand, as the temperature of a light emitting element such as an LED increases, the light output decreases and the useful life is shortened. For this reason, for lighting fixtures that use solid light emitting elements such as LEDs and EL elements as light sources, it is possible to suppress the temperature of the light emitting elements from rising in order to extend the service life or improve characteristics such as light emission efficiency. It is necessary.

  Conventionally, as a lighting fixture for a general house using LEDs as a light source, for example, a lighting device that controls lighting of LEDs is provided around an attachment portion to a hanging ceiling installed on a ceiling surface, and an outer periphery in the vicinity of this lighting device There are some in which a plurality of LEDs are arranged. This LED is arranged so as to emit light toward the outer peripheral side in the lateral direction, and the emitted light is reflected by a reflecting plate provided on the ceiling surface side to irradiate the front side.

Sharp / LED ceiling light [October 5, 2010 search] (http://www.sharp.co.jp/corporate/news/100819-a-2.html)

  However, in the conventional lighting fixture as described above, since the light emitted from the LED emitted in the lateral direction is reflected and applied to the front side, the configuration may be complicated. Moreover, since the LED is configured to be disposed in the vicinity of the lighting device, the heat generated from the LED and the heat generated from the lighting device interfere with each other, and the heat may cause an increase in the temperature of the LED. is there.

  The present invention has been made in view of the above problems, and provides a lighting fixture that can easily suppress the temperature rise of a light emitting element with a simplified configuration and can uniformize the image of light emitted from the light emitting element. For the purpose.

  A lighting fixture according to an embodiment of the present invention includes a mounting portion facing a wiring fixture installed on a fixture mounting surface, and a substrate disposed around the mounting portion with a mounting surface facing the front side. And arranged in a plurality of rows on the circumference of a substantially concentric circle having different radii or a polygonal circumference having substantially the same center of a different size, and arranged in a circumferential direction between adjacent rows. The same number of light emitting elements arranged in each column are provided.

  According to the embodiment of the present invention, the configuration can be simplified, the heat dissipation structure can be easily configured, and the image of light emitted from a plurality of light emitting elements can be made uniform. Possible lighting fixtures can be provided.

It is a perspective view which shows the lighting fixture which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the same lighting fixture. It is a top view which shows the lighting fixture seeing from the downward direction. It is a top view which shows the light source part in the same lighting fixture. It is a top view which shows the light source part which concerns on the 2nd Embodiment of this invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In each drawing, the wiring connection relationship using lead wires or the like is omitted. In addition, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  The lighting fixture of the present embodiment is a type that is used by being attached to a hanging sealing body as a wiring fixture installed on the fixture mounting surface, and a plurality of light emitting elements arranged in a plurality of rows on the circumference. Indoor lighting is performed by light emitted from a light source unit having an element.

  In FIG. 1 thru | or FIG. 3, the lighting fixture is provided with the main body 1, the light source part 2, the lighting device 3, the attaching part 4, the cover member 5, and the reflecting plate 6. FIG. Moreover, the adapter A electrically and mechanically connected to the hooking sealing body Cb installed in the ceiling surface C as an instrument mounting surface is provided. Such a lighting fixture is formed in a round and circular appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C.

  As representatively shown in FIG. 2, the main body 1 is formed in a circular shape from a flat plate of a metal material such as a cold-rolled steel plate, and a lighting device 3 and a mounting portion 4 which will be described later are disposed in a substantially central portion. A circular recess 11 and an opening 12 are formed.

  As described with reference to FIG. 4, 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 has a predetermined width dimension and is formed in a substantially circle shape. The substrate 21 is made of a glass epoxy resin flat plate as an insulating material, and a wiring pattern is formed of copper foil on the surface side. Further, a white resist layer acting as a reflective layer is applied on the wiring pattern, that is, on the surface of the substrate 21. The material of the substrate 21 can be a ceramic material or a synthetic resin material when an insulating material is used. Furthermore, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum and excellent heat dissipation can be applied.

  The light emitting element 22 is an LED, which is a surface mount type LED package. A plurality of LED packages are mounted in a plurality of rows along the circumferential direction of the circle-shaped substrate 21, in this embodiment, two rows on the inner peripheral side and the outer peripheral side. A plurality of LED packages adjacent in the circumferential direction are arranged on the circumference at substantially equal intervals, specifically, 44 are mounted in the same number in two rows on the inner and outer sides. Has been.

  In addition, the LED packages in the inner and outer rows are arranged so as not to overlap each other in the circumferential direction (indicated by d in FIG. 4). More specifically, the LED package of the other row (for example, the outer row) is arranged at the substantially central portion of the separation distance of the LED packages adjacent in the circumferential direction of one row (for example, the inner row). The LED packages in one row are arranged at substantially the center of the separation distance between the LED packages adjacent to each other in the circumferential direction of the other row, and this is in a mutual arrangement relationship that is continuous in the circumferential direction.

That is, the same number (44) of light emitting elements 22 in each row are arranged in a plurality of rows (two rows) on the circumference of substantially concentric circles having different radii, and between adjacent rows (inner and outer rows). ) Are shifted in the circumferential direction, and so-called staggered between adjacent rows.
In this way, since the same number of light emitting elements 22 are mounted in each column, the light emitting elements 22 can be distributed and arranged on the substrate 21 in a well-balanced position.

  The LED package is generally composed of an LED chip disposed in a main body formed of ceramics, and a translucent resin for molding such as an epoxy resin or a silicone resin that seals the LED chip. Yes.

  The LED chip is a blue LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light, a yellow phosphor that emits yellow light that is complementary to blue light is used. Yes.

  In addition, LED may be made to mount an LED chip directly on the board | substrate 21, and you may make it mount a bullet-type LED, and a mounting system and a format are not exceptionally limited.

  In the light source unit 2 configured as described above, as representatively shown in FIGS. 2 and 3, the substrate 21 is positioned around the mounting unit 4, and the mounting surface of the light emitting element 22 is the front side, that is, the lower side. Are arranged in the direction of irradiation. Moreover, it attaches by fixing means, such as a screw | thread, so that the back surface side of the board | substrate 21 may closely_contact | adhere to the inner surface side of the main body 1. FIG. Accordingly, the substrate 21 is thermally coupled to the main body 21 so that heat from the substrate 21 is conducted from the back surface side to the main body 21 and radiated.

  As shown in FIGS. 2 and 3, the lighting device 3 includes a substantially short cylindrical case, a circuit board 31 mounted and accommodated in the case, and circuit components mounted on the circuit board. ing. The lighting device 3 is disposed and attached to a concave portion 11 formed in the central portion of the main body 1, and the adapter A side is electrically connected and connected to a commercial AC power source via the adapter A. Therefore, the lighting device 3 receives this AC power supply, generates a DC output, supplies the DC output to the light emitting element 22 via the lead wire, and controls the lighting of the light emitting element 22.

  The attachment portion 4 is an adapter guide formed in a substantially cylindrical shape, and an engagement port through which the adapter A is inserted and engaged is provided at the center portion of the adapter guide. The adapter guide is disposed such that the outer peripheral surface thereof is located on the inner peripheral side of the case of the lighting device 3, in other words, the lighting device 3 is disposed on the outer peripheral side of the adapter guide. It has become. The adapter guide extends through the opening 12 of the main body 1 to the front side.

  Note that the attachment portion 4 is not necessarily a member referred to as an adapter guide or the like. For example, it may be an opening formed in the main body 1 or the reflection plate 6, and in short, means a member or a portion that is opposed to the hooking sealing body Cb as a wiring device and to which the adapter A is engaged. .

  The cover member 5 is made of a translucent material such as an acrylic resin and has a milky white diffusibility. The cover member 5 has a circular base portion 51 formed in a flat shape, And a side edge 52 extending obliquely from the outer periphery toward the inner periphery. And the cover member 5 is attached to the outer periphery part of the main body 1 so that the front side of the main body 1 including the light source part 2 may be covered.

  As shown in FIG. 2, the reflecting plate 6 is formed in a circular shape having an inclined reflecting surface 61 from a flat plate of a metal material such as a cold rolled steel plate, and is used for operating the adapter A at a substantially central portion. An opening is formed. Therefore, a part of the light emitted from the light emitting element 22 is reflected to the front side by the reflecting surface 61 and is effectively used.

  The adapter A is electrically and mechanically connected to a hooking sealing body Cb installed on the ceiling surface C by a hooking blade provided on the upper surface side, and has a substantially cylindrical shape. Is provided so that it always protrudes to the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating a lever provided on the lower surface side. Further, a power 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.

  Next, the attachment state to the ceiling surface C of a lighting fixture is demonstrated. As shown in FIG. 2, the hanging ceiling body Cb is installed on the ceiling surface C. The adapter A is electrically and mechanically connected to the hooking sealing body Cb. From this state, as shown by the arrow in the figure, the fitting body 4 is adjusted until the engaging portion A1 of the adapter A is securely engaged with the engaging port of the adapter guide while aligning the engaging port of the adapter guide as the mounting portion 4 with the adapter A. Push up from below to perform the mounting operation.

  Further, when removing the instrument main body, it can be removed by removing the cover member 5 and operating the lever provided on the adapter A to disengage the engaging portion A1 of the adapter A.

  When power is supplied to the lighting device 3 in a state where the lighting fixture is attached to the ceiling surface C, the light emitting elements 22 are energized through the substrate 21 and the light emitting elements 22 are turned on. The light emitted from the light emitting element 22 passes through the cover member 5 and is irradiated outward.

  In this case, since the light emitting elements 22 are arranged in a balanced manner by shifting the positions, the luminance unevenness of the light source unit 2 can be reduced, and the images of light emitted from the plurality of light emitting elements can be made uniform. It becomes possible.

  In addition, since the substrate 21 is positioned around the mounting portion 4 and the mounting surface of the light emitting element 22 is disposed toward the front surface side, the configuration can be simplified. A heat dissipation structure for radiating heat can be easily configured. For example, as in the present embodiment, a configuration in which the back surface side of the substrate 21 is thermally coupled to the main body 1 and heat from the substrate 21 is conducted to the main body 21 to dissipate heat can be easily realized. Thereby, the temperature rise of the light emitting element 22 can be suppressed.

  In addition, the lighting device 3 is disposed on the outer peripheral side of the mounting portion 4, and the substrate 21 is positioned around the mounting portion 4, and the back side is thermally coupled to the main body 1. Mutual thermal interference between the heat generated from the device 3 and the heat generated from the light emitting element 22 is reduced, and the temperature rise of the light emitting element 22 can be effectively suppressed.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 shows the plane of the light source unit 2 as in FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted.

  In this embodiment, the light emitting elements 22 are mounted over three rows on the inner peripheral side, the central side, and the outer peripheral side. In each row, the LED packages adjacent in the circumferential direction are arranged in the same number and arranged on the circumference with a substantially equal spacing.

  In addition, the LED packages in adjacent rows are arranged so as to be offset so as not to overlap each other in the circumferential direction. That is, each LED package in the inner circumferential row and each LED package in the middle row are provided with a shift indicated by d1 in the drawing, and each LED package in the central row and the outermost row are arranged in the middle row. Each LED package is provided with a deviation d2 in the figure.

  Therefore, the same number (44) of light emitting elements 22 in each row are arranged in a plurality of rows (3 rows) on the circumference of substantially concentric circles having different radii, and between adjacent rows (inner and middle rows). , The central side and the outer peripheral side) are shifted in the circumferential direction.

  As described above, as in the first embodiment, the same number of light emitting elements 22 are mounted in each column, so that the light emitting elements 22 can be distributed and arranged on the substrate 21 in a balanced manner by shifting the positions. It is possible to make the image of the light emitted from the light uniform.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, a light emitting element is mounted on a substrate, arranged in a plurality of rows on a polygonal circumference that has substantially the same center of different size, and the same number of rows is mounted so that the rows are shifted in the circumferential direction between adjacent rows. You may make it do. Specifically, if the light emitting elements are mounted on the hexagonal polygonal circumference, the light emitting elements are arranged on the inner hexagonal circumference and the outer hexagonal circumference, and are arranged on the inner side. In this case, the light emitting elements arranged on the outside and the light emitting elements arranged on the outside are arranged so as to be shifted in the circumferential direction.

The substrate is preferably formed in a circular circle shape or a hexagonal or octagonal polygonal shape, but is not limited to this shape. In short, the shape of the substrate is not particularly limited as long as the light emitting elements can be arranged on a circumference or a polygonal circumference. Further, the substrate may be divided into a plurality of parts, which may be combined to form a whole.
Further, in order to improve the uniformity of light emitted from the light source unit, a diffusion lens may be provided corresponding to the light emitting element, or a light transmittance control means may be provided on the cover member.
Furthermore, solid-state light emitting elements such as LEDs and organic EL can be applied as the light emitting elements. In this case, the number of light emitting elements and the number of columns are not particularly limited.

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Light source part, 3 ... Lighting apparatus, 4 ... Mounting part (adapter guide), 5 ... Cover member, 6 ... Reflecting plate, 21 ... Board | substrate , 22 ... Light emitting element (LED), C ... Appliance mounting surface (ceiling surface), Cb ... Wiring appliance (hanging ceiling body)

Claims (2)

A mounting portion facing the wiring device installed on the device mounting surface;
A substrate positioned around the mounting portion and disposed with the mounting surface facing the front surface;
Mounted on this board and arranged in multiple rows on the circumference of a substantially concentric circle with different radii or on the circumference of a polygon with roughly the same center of different size, and shifted in the circumferential direction between adjacent rows The same number of light emitting elements arranged in each row;
The lighting fixture characterized by comprising.   The lighting apparatus according to claim 1, wherein a lighting device that controls lighting of the light emitting element is disposed on an outer peripheral side of the attachment portion.

Images