CN104913249A - Lighting fixture - Google Patents

Abstract

A lighting fixture with a simplified structure, which can easily suppress the temperature rise of a light-emitting element and can uniformize the image of light emitted from the light-emitting element. The present invention is a lighting fixture, comprising: a mounting part (4) facing a wiring device (Cb) provided on a fixture mounting surface (C); a substrate (21) located around the mounting part (4) , and the mounting surface is disposed facing the front side; and the same number of light-emitting elements (22) in each row are mounted on the substrate (21), and arranged in a plurality of rows on the circumference of substantially concentric circles with different radii Or on the periphery of polygons whose centers are substantially the same in different sizes, and between adjacent columns, they are arranged in a shifted manner in the circumferential direction.

Description

lighting equipment

This application is a divisional application with the original application number 201110304690.6, the application date is October 10, 2011, and the invention name is "lighting appliance".

technical field

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

Background technique

Among lighting fixtures for ordinary houses, lighting fixtures using a ring-shaped fluorescent lamp (lamp) as a main light source and having a cover provided to cover the lower side of the ring-shaped fluorescent lamp have been popularized. ) member (shade), and the external shape is formed into a spherical shape.

Recently, with the increase in output, efficiency, and popularization of light-emitting elements such as LEDs, lighting fixtures for ordinary houses as described above that use light-emitting elements as light sources and can expect longer life are being developed.

On the other hand, as the temperature of light-emitting elements such as LEDs rises, the output of light decreases, and the service life also becomes shorter. Therefore, for lighting fixtures using solid-state light-emitting elements such as LEDs or electroluminescence (EL) elements as light sources, it is necessary to suppress the temperature rise of the light-emitting elements in order to improve durability or improve characteristics such as luminous efficiency.

Conventionally, as lighting fixtures for ordinary houses using LEDs as light sources, there is, for example, a lighting fixture in which a lighting device for controlling lighting of LEDs is installed around an installation part, and a plurality of lighting fixtures are arranged around the lighting device. As for the LED, the mounting part is mounted on a ceiling lamp holder provided on a ceiling surface. The LEDs are arranged so as to emit light toward the lateral outer peripheral side, and the emitted light is reflected by a reflector provided on the ceiling surface side to irradiate the front side.

[Prior art literature]

[Non-patent literature]

[Non-Patent Document 1] Sharp/LED ceiling light [retrieved on October 5, 2010]

(http://www.sharp.co.jp/corporate/news/100819-a-2.html)

However, in the conventional lighting fixture as described above, the light emitted from the LED in the lateral direction is reflected and irradiated toward the front side, and thus the structure may be complicated. Furthermore, since the LED is arranged near the lighting device, heat generated from the LED and the lighting device may interfere with each other, and the temperature of the LED may rise due to the heat.

Contents of the invention

The present invention was made in view of the above problems, and an object of the present invention is to provide a lighting fixture having a simplified structure, which can easily suppress the temperature rise of the light-emitting element and can uniformize the image of light emitted from the light-emitting element.

A lighting fixture according to an embodiment of the present invention includes: a fixture body; a substrate arranged on the fixture body with the mounting surface facing the front side; On the circumference of different substantially concentric circles or on the circumference of polygons having different sizes but having substantially the same center, they are arranged in a shifted manner in the circumferential direction between adjacent rows.

(effect of invention)

According to the embodiments of the present invention, it is possible to provide a lighting fixture capable of simplifying the structure, easily constituting a heat dissipation structure, and uniformizing the image of light emitted from a plurality of light emitting elements.

Description of drawings

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

Fig. 2 is a cross-sectional view showing a lighting fixture according to a first embodiment of the present invention.

Fig. 3 is a plan view showing the lighting fixture according to the first embodiment of the present invention seen from below.

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

5 is a plan view showing a light source unit according to a second embodiment of the present invention.

[explanation of the symbol]

1: Ontology

2: Light source department

3: lighting device

4: Mounting part (adapter guide part)

5: cover member

6: reflector

11: concave part

12: opening

21: Substrate

22: Light emitting element (LED)

51: Basal part

52: side edge

61: reflective surface

A: Adapter

A1: locking part

C: Appliance installation surface (ceiling surface)

Cb: wiring device (main body of ceiling lamp holder)

d1, d2: deviation

Detailed ways

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4 . In each figure, the wiring connection relationship shown by the lead wire etc. is abbreviate|omitted. In addition, the same code|symbol is attached|subjected to the same part, and repeated description is abbreviate|omitted.

The lighting fixture according to this embodiment is used by being attached to the lamp holder main body of a ceiling lamp, and illuminates a room by light emitted from a light source part having a plurality of light emitting elements arranged in a plurality of rows on the circumference. The main body of the lamp holder is arranged on the appliance installation surface and serves as a wiring appliance.

In FIGS. 1 to 3 , the lighting fixture includes a main body 1 , a light source unit 2 , a lighting device 3 , a mounting unit 4 , a cover member 5 , and a reflector 6 . Furthermore, the lighting fixture includes an adapter (adapter) A electrically and mechanically connected to a ceiling socket main body Cb provided on a ceiling surface C which is a fixture mounting surface. Such a lighting fixture has a spherical, circular appearance, the front side is used as a light irradiation surface, and the back side is used as an attachment surface to the ceiling surface C. As shown in FIG.

As representatively shown in FIG. 2 , the main body 1 is formed in a circular shape from a flat plate of metal material such as cold-rolled steel plate, and a circle for arranging the lighting device 3 and the mounting part 4 described later is formed in a substantially central portion. Shape recess 11 and opening 12 .

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 and is formed in a substantially circular shape, and is a flat plate made of glass epoxy resin as an insulating material, and a wiring pattern (pattern) is formed with copper foil on the surface side. . Furthermore, on the wiring pattern, that is, on the surface of the substrate 21, a white resist (resist) layer functioning as a reflective layer is applied. In addition, when the material of the substrate 21 is an insulating material, a ceramics material or a synthetic resin material can be applied. 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 such as aluminum having good thermal conductivity and excellent heat dissipation is applicable.

The light emitting element 22 is an LED, and is a surface mount type LED package. The LED packages are mounted over a plurality of rows along a plurality of circumferential directions of the annular substrate 21 , and in this embodiment, are mounted over two rows on the inner peripheral side and the outer peripheral side. A plurality of LED packages adjacent to each other in the circumferential direction are mounted on the circumference at substantially equal intervals. Specifically, 44 LED packages are mounted in the same number on both the inner peripheral side and the outer peripheral side. LED package.

Furthermore, the respective LED packages on the inner peripheral side and outer peripheral side rows are shifted (indicated by d in FIG. 4 ) and arranged so as not to overlap each other in the circumferential direction. More specifically, LED packages of another row (for example, a row on the outer peripheral side) are arranged at substantially the center of the distance between LED packages adjacent to each other in the circumferential direction in one row (for example, a row on the inner peripheral side), The LED packages of one row are disposed substantially at the center of the distance between the adjacent LED packages of the other row in the circumferential direction, and are arranged in a continuous relationship with each other in the circumferential direction.

That is, the same number (44) light-emitting elements 22 in each row are arranged in a plurality of rows (two rows) on the circumference of substantially concentric circles with different radii, and between adjacent rows (inner peripheral side and outer peripheral side) Rows) are arranged staggered along the circumferential direction, so-called zigzag arrangement between adjacent rows.

Since the same number of light-emitting elements 22 are mounted in each column in this way, the light-emitting elements 22 can be dispersed and arranged on the substrate 21 with a good balance.

The LED package generally includes: an LED chip (chip), which is arranged on a body including ceramics; and a light-transmitting resin for molding (mold) such as epoxy resin or silicone (silicone) resin, and seals the LED chip. .

The LED chip is a blue LED chip that emits blue light. Phosphor is mixed into the light-transmitting resin, and a yellow phosphor that emits yellow light having a complementary color relationship with blue light is used in order to emit white light.

In addition, LED chips can be directly mounted on the substrate 21 , or cannonball-shaped LEDs can be mounted, and the mounting method or form is not particularly limited.

As typically shown in FIGS. 2 and 3 , the light source unit 2 configured in this way has the substrate 21 positioned around the mounting portion 4 and the mounting surface of the light emitting element 22 is arranged facing the front side, that is, the downward irradiation direction. In addition, the substrate 21 is attached with a fixing mechanism such as a screw so that the back surface side of the substrate 21 is in close contact with the inner surface side of the main body 1 . Accordingly, the substrate 21 is thermally bonded to the body 21 so that heat from the substrate 21 is conducted from the back side to the body 21 and dissipated.

As shown in FIGS. 2 and 3 , the lighting device 3 includes: a substantially short cylindrical case; a circuit board 31 housed in the case; and circuit components mounted on the circuit board. The lighting device 3 is arranged and installed in the recess 11 formed in the central part of the main body 1, and is electrically connected to the side of the adapter A, and is connected to a commercial AC power supply through the adapter A. 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 control the lighting of the light emitting element 22 .

The attaching portion 4 is an adapter guide formed in a substantially cylindrical shape, and an engaging port through which the adapter A is inserted and engaged is provided at a central portion of the adapter guide. The adapter guide is arranged such that its outer peripheral surface is located on the inner peripheral side of the case of the lighting device 3 , in other words, the lighting device 3 is arranged on the outer peripheral side of the adapter guide. Furthermore, the adapter guide portion is inserted through the opening 12 of the main body 1 and extends to the front side.

In addition, the attachment part 4 does not necessarily need what is called an adapter guide part etc. For example, it may be an opening formed in the main body 1 or the reflector 6, and mainly refers to a member or a portion that faces the ceiling lamp holder main body Cb as a wiring device and engages the adapter A.

The cover member 5 is made of a material such as acryl resin, which is translucent, milky white, and diffusible, and includes: a circular base portion 51 formed in a flat shape; and a side edge portion 52 formed from the base. The outer periphery of the portion 51 extends in an oblique inner peripheral direction. Furthermore, the cover member 5 is attached to the outer peripheral portion of the main body 1 so as to cover the front side of the main body 1 including the light source unit 2 .

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

The adapter A is a part that is electrically and mechanically connected to the ceiling lamp holder main body Cb provided on the ceiling surface C through a hook provided on the upper side. A pair of locking parts A1 is provided so that a spring always protrudes toward the outer peripheral side. This locking part A1 is sunk by operating the lever (lever) provided in the lower surface side. Furthermore, a power cord (cord) not shown connected to the lighting device 3 is derived from the adapter A, and is connected to the lighting device 3 via a connector.

Next, an attached state of the lighting fixture attached to the ceiling surface C will be described. As shown in FIG. 2 , on the ceiling surface C, the ceiling lamp holder main body Cb is installed. Furthermore, the adapter A is electrically and mechanically connected to the ceiling socket main body Cb. From this state, as shown by the arrow in the figure, on the one hand, align the engaging port of the adapter guide part as the installation part 4 with the adapter A, and on the other hand, push up the appliance body from the bottom until the locking part A1 of the adapter A is secure. Engage with the engaging opening of the guide part of the adapter to carry out the installation operation.

Furthermore, when detaching the appliance body, it can be detached by removing the cover member 5 and operating the operating lever provided on the adapter A to release the engagement of the locking portion A1 of the adapter A.

When power is supplied to the lighting device 3 with the lighting fixture mounted on the ceiling surface C, electricity is supplied to the light emitting elements 22 via the substrate 21 , and each light emitting element 22 is turned on. The light emitted from the light emitting element 22 passes through the cover member 5 and is irradiated to the outside.

At this time, since the light emitting elements 22 are distributed and arranged in a well-balanced manner with shifted positions, unevenness in brightness of the light source unit 2 can be reduced, and an image of light emitted from a plurality of light emitting elements can be made uniform.

Moreover, since the substrate 21 is located around the mounting portion 4, and the mounting surface of the light-emitting element 22 is arranged facing the front side, the structure can be simplified, and further, the structure for dissipating heat from the substrate 21 can be easily configured. heat dissipation structure. For example, as in the present embodiment, a structure in which the back side of the substrate 21 is thermally bonded to the main body 1 and heat from the substrate 21 is conducted to the main body 21 and dissipated can be easily realized. Thereby, the temperature rise of the light emitting element 22 can be suppressed.

In addition, since the lighting device 3 is arranged on the outer peripheral side of the mounting part 4, the substrate 21 is located around the mounting part 4, and the back side is thermally bonded to the main body 1, the heat generated from the lighting device 3 is the same as that generated from the light emitting element 22. Interference between the heat of each other 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. 5 . FIG. 5 is a plan view showing the light source unit 2 similarly to FIG. 4 . In addition, the same code|symbol is attached|subjected to the part which is the same as or equivalent to 1st Embodiment, and redundant description is abbreviate|omitted.

In this embodiment, the light emitting elements 22 are mounted over three rows of the inner peripheral side, the central side, and the outer peripheral side. In addition, in each column, the LED packages adjacent to each other in the circumferential direction are spaced apart from each other at substantially equal intervals, and the same number of LED packages are aligned and mounted on the circumference.

In addition, the LED packages on adjacent columns are arranged in a shifted manner so as not to overlap with each other in the circumferential direction. That is, the LED packages on the inner row and the LED packages on the central row have a deviation shown by d1 in the figure, and the LED packages on the central row and the LED packages on the outer row There is a deviation indicated by d2 on the diagram.

Therefore, the same number (44) of light-emitting elements 22 in each row is arranged in a plurality of rows (three rows) on the circumference of substantially concentric circles with different radii, and between adjacent rows (inner peripheral and central sides) row, the row on the central side, and the row on the outer peripheral side) are arranged in a shifted manner along the circumferential direction.

In this way, similarly to the first embodiment, since the same number of light emitting elements 22 are mounted in each column, the light emitting elements 22 can be dispersed and arranged on the substrate 21 with a good balance, so that light emitted from a plurality of light emitting elements can be emitted. image homogenization of light.

In addition, this invention is not limited to the structure of each said embodiment, Various deformation|transformation is possible in the range which does not deviate from the summary of invention. For example, the present lighting fixture may be a pendant type or a ceiling-embedded type suspended from the ceiling surface, in addition to a direct mount type that is directly mounted on the ceiling. Furthermore, on the substrate, the light-emitting elements may be arranged in a plurality of rows on the circumference of a polygon with different sizes and approximately the same center, and each row may be aligned in a manner that the adjacent rows are arranged in a manner of being shifted in the circumferential direction. The number is installed. Specifically, assuming that light-emitting elements are mounted on the perimeter of a hexagonal polygon, it is the case that the light-emitting elements are arranged on the inner hexagonal perimeter and the outer hexagonal perimeter, and The light emitting elements arranged on the inner side and the light emitting elements arranged on the outer side are shifted and arranged in the circumferential direction.

The substrate is preferably formed in a circular ring 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 the circumference or the circumference of a polygon. Furthermore, the board|substrate may be divided and formed into several board|substrates, and these board|substrates may be combined and constituted as a whole.

Furthermore, in order to improve the uniformity of light radiated from the light source unit, a diffuser lens (lens) may be provided corresponding to the light emitting element, or a light transmittance control mechanism may be provided on the cover member.

Furthermore, solid-state light-emitting elements such as LEDs and organic ELs can be used as the light-emitting element. In this case, the number of light-emitting elements and the number of columns are not particularly limited.

Claims (3)

1. a ligthing paraphernalia, is characterized in that comprising:

Body, has installation portion, and this installation portion is installed on distributor, and this distributor is then arranged at utensil installed surface;

Ignition device, is disposed in the outer circumferential side of described installation portion, and is covered in box body;

Substrate, the front face side in described substrate is equipped with installed surface, and the mode that described substrate overlaps in the outside of described ignition device with described ignition device of getting along well is disposed in described body; And

Light-emitting component, in different circumferentially the becoming multiple row and be installed on described substrate of radius.

2. ligthing paraphernalia according to claim 1, is characterized in that,

In described body, be equipped with ignition device light-emitting component being carried out to lighting control.

3. ligthing paraphernalia according to claim 1 and 2, is characterized in that,

Be positioned at the surrounding of described body and arrange the substrate being provided with light-emitting component.