JP2012160418A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture with a side of a fixture body and a light source covered with one shade, that can reduce size, and give light to a working surface.SOLUTION: The lighting fixture 10 includes: a fixture body 11 formed into a bottomed-cylindrical shape, and set on a working surface side; a light-emitting element mounted on a rear surface of the bottom part of the fixture body 11; and a shade 14 covering the side of the fixture body 11 and the light-emitting element. The fixture body 11 includes a slant surface 20 from a mounting surface of the light-emitting element toward sideways, and the shade 14 includes a reflecting surface 33 facing to a front surface of the light-emitting element.

Description

  The present invention relates to a lighting device such as a ceiling light installed on a wall surface or ceiling surface of a corridor, for example.

  Conventionally, there has been known a lighting fixture in which a plurality of radiating fins are provided on the outer bottom surface of the fixture main body so as to fit in the inner region of the outer periphery of the fixture main body, and the radiating fins can freely protrude into the outer region of the outer periphery of the fixture body (for example, Patent Document 1).

Japanese Patent Laying-Open No. 2008-130397 (FIG. 1, claim 1)

The lighting fixture of patent document 1 can be made compact by setting it as the structure which improves the heat dissipation of a fixture main body.
By the way, as shown in FIG. 14, a lighting fixture 100 is proposed in which the LED unit 102 is attached to the bottom of the fixture body 101 and the shade 103 is attached below the fixture body 101.
In such a conventional lighting device 100, the power supply unit 104 is arranged on the inner peripheral portion of the device main body 101, the device main body 101 is attached to a construction surface (not shown) by a screw 105, and the shade 103 is attached to the device main body 101. Screwed.

In such a conventional lighting fixture 100, in order to dissipate the heat generated by the LED unit 102, the shade main body 101 is not covered with the shade 103 by attaching the shade 103 below the fixture main body 101.
However, on the design side, it is desirable to cover the side of the instrument body 101 and the LED unit 102 with one shade.
Therefore, such a conventional lighting fixture 100 is not good in terms of design because the fixture main body 101 is independently arranged above the shade 103.

On the other hand, in order to solve such a problem, a lighting fixture in which the side of the fixture body and the LED unit are covered with one shade has been proposed.
However, although such a conventional lighting fixture is good in terms of design, since the LED unit has directivity, light does not travel to the construction surface side.
Therefore, in such a conventional lighting fixture, the impression of the construction space becomes dark.
The sense of brightness of the construction space is enhanced by turning light on the walls and ceilings and greatly affects the impression of the space, so it is one of the important factors in the lighting plan as well as ensuring the illuminance of the work surface. .

  The present invention has been made in order to solve the above-described problems. The object of the present invention is to cover the side of the instrument main body and the light source with a single shade to reduce the size and provide light to the construction surface side. To provide an instrument.

  A lighting fixture according to the present invention is formed in a bottomed cylindrical shape, and is a fixture main body installed on a construction surface side, a light emitting element attached to a bottom rear surface of the fixture main body, a side of the fixture main body, and the light emitting element The instrument body has an inclined surface laterally from the mounting surface of the light emitting element, and the shade has a reflective surface facing the front surface of the light emitting element.

  As for the lighting fixture which concerns on this invention, the said reflective surface inclines in the attachment surface direction of the said light emitting element of the said fixture main body.

  According to the lighting fixture according to the present invention, the side of the fixture main body and the light source are covered with one shade, so that the size can be reduced and light can be applied to the construction surface side.

The side view of the installation state of the ceiling surface of the lighting fixture of 1st Embodiment which concerns on this invention The disassembled perspective view seen from diagonally upward of the lighting fixture of 1st Embodiment which concerns on this invention Side view including a vertical cross-sectional view of the shade of the lighting apparatus according to the first embodiment of the present invention. The external appearance perspective view seen from diagonally downward of the fixture main body of the lighting fixture of 1st Embodiment which concerns on this invention The bottom view of the fixture main body of the lighting fixture of 1st Embodiment which concerns on this invention. The enlarged view around the radiation fin of the fixture main body of the lighting fixture of 1st Embodiment which concerns on this invention. The disassembled perspective view of the LED unit of the lighting fixture of 1st Embodiment which concerns on this invention. The side view explaining the flow of the air in the lighting fixture of 1st Embodiment which concerns on this invention. The expanded side view explaining the flow of the air in the lighting fixture of 1st Embodiment which concerns on this invention The partially broken vertical sectional view of the shade in the lighting fixture of 1st Embodiment which concerns on this invention Side view including a vertical sectional view of a shade for explaining optical characteristics relating to shadows in the lighting apparatus of the first embodiment according to the present invention. Side view including a vertical sectional view of a shade for explaining optical characteristics relating to reflection in the lighting apparatus of the first embodiment according to the present invention. The exploded perspective view of the lighting fixture of 2nd Embodiment which concerns on this invention Exploded perspective view of a conventional lighting fixture

Hereinafter, the lighting fixture of several embodiment which concerns on this invention is demonstrated with reference to drawings.
(First embodiment)
The lighting fixture 10 of 1st Embodiment which concerns on this invention is the LED main body 11 and LED unit 13 which has LED12 which is a light emitting element attached to the bottom back surface of the fixture main body 11, the side of the fixture main body 11, and the LED unit 13. And a shade 14 covering the.
As shown in FIG. 1, the lighting fixture 10 is mechanically fixed and electrically connected to the construction surface 1 by a hook sealing member 15 provided at the upper end of the fixture body 11.
In addition, as a fixing method of the lighting fixture 10, a rosette method and a scab method other than the hooking sealing member 15 can be applied as a saving construction method. Moreover, methods, such as a duct, direct attachment, and suspension, can be implemented.

As shown in FIG. 2, the instrument main body 11 is molded with a metal material such as ADC 12 and dyed white, and is fixed to the fixed body 18 via the insulating sheet 17 on the upper part of the power supply unit 16 accommodated in the top. Is attached.
As for the instrument main body 11, the LED unit 13 is attached to the LED attachment surface 19 of a bottom part. The instrument body 11 has an inclined surface 20 laterally from the LED mounting surface 19, and has a plurality of radiating fins 21 erected on the inclined surface 20 from the LED unit 13 toward the construction surface 1.
The radiating fins 21 may be formed in a spiral shape instead of being erected from the LED unit 13 toward the construction surface 1.

An LED unit 13 and a power feeding unit 16 are integrally attached to the instrument body 11.
Therefore, as compared with the case where the LED unit 13 and the power feeding unit 16 are arranged in different places, wiring (not shown) can be omitted and the structure can be reduced to a simple structure.
The seed 14 is made of a resin such as polymethyl methacrylate resin (PMMA), and is dyed milky white.

As shown in FIG. 3, the instrument body 11 has a plurality of heat radiation fins 21 erected from the LED unit 13 toward the construction surface 1 on the inclined surface 20 that is laterally provided from the LED mounting surface 19. The generated heat is easily transmitted to the heat radiating fins 21.
Therefore, the heat of the LED 12 can be efficiently radiated by the heat radiating fins 21, and the side of the instrument body 11 and the LED unit 13 can be covered with one shade 14 to improve the heat radiating characteristics.
At this time, since the radiation fin 21 enlarges the surface area of the instrument main body 11, the heat radiation performance can be improved.
Furthermore, since the radiation fins 21 are provided on the inclined surface 20 of the instrument body 11, the radiation fins 21 can be effectively installed without reducing the outer shape of the instrument body 11, and the size can be reduced.

The shade 14 has a bottom plate 23 at the bottom of the peripheral plate 22, an opening 24 at the center of the bottom plate 23, and an opening 25 at the upper end of the peripheral plate 22.
Since the shade 14 is milky white, it is intended to transmit light. The same effect can be obtained when the other material is used for the shade 14.
When the shade 14 has a heat dissipation property higher than that of a resin such as iron, the degree of heat dissipation can be increased. In terms of design, it is best in terms of appearance to use glass.
The shade 14 is attached to the instrument body 11 by rotating the guide receiver 26 provided at the upper end of the inner peripheral surface by engaging with the guide protrusion 27 provided at the upper end of the instrument body 11 by a predetermined angle. It is done.

As shown in FIGS. 4 and 5, the LED unit 13 is attached to the LED attachment surface 19 with a hand tool such as a driver.
The LED unit 13 cannot be removed alone when attached to the instrument body 11.
As shown in FIG. 6, the heat radiating fins 21 project radially from the LED mounting surface 19 at an interval angle θ <b> 1 of, for example, 10 degrees, and have an inclined chamfered portion 28 on the LED mounting surface 19 side. .
In addition, the space | interval angle of the radiation fin 21 is not limited to 10 degree | times, As long as it is an angle radiated | emitted, another angle may be chosen.

As shown in FIG. 7, in the LED unit 13, the base member 30 is disposed on the LED substrate 29 on which the LEDs 12 are mounted, and the lens 31 and the frame 32 are disposed on the lower portion of the LED substrate 29.
The LED 12 can select various color temperatures. In addition to the LED 12, an organic EL or the like can be selected as the light emitting element.

Next, the heat dissipation characteristics of the lighting fixture 10 will be described.
As shown in FIG. 8, the gap between the radiation fin 21 and the inner peripheral surface of the shade 14 is such that the vicinity of the LED mounting surface 19 of the appliance main body 11 is the gap dimension L1, and the central portion of the appliance main body 11 is smaller than the gap dimension L1. The gap size L2 is small.
And as for the clearance gap between the radiation fin 21 and the internal peripheral surface of the shade 14, the upper end part vicinity of the instrument main body 11 is the clearance gap dimension L3 smaller than the clearance gap dimension L2.
Therefore, the opening 24 on the irradiation surface side of the shade 14 serves as an intake port, and the opening 25 on the construction surface side serves as an exhaust port to create an air flow.

At this time, if the speed of the air flow coming from the intake port is set to 1 as an integer for convenience, the gap dimension L1 near the LED mounting surface 19 of the instrument body 11 is 25 mm, for example. 11 is, for example, 10 mm.
Thereby, the clearance dimension of the instrument main body 11 and the shade 14 becomes 1/2 or less as it goes from the LED attachment surface 19 vicinity of the instrument main body 11 to the upper end part vicinity of the instrument main body 11.
At this time, since the amount of air does not change, the speed of the air flowing toward the minimum gap becomes 1 or more, and the speed of the air is accelerated around the instrument body 11.

Therefore, the accelerated air becomes an upward air flow directed upward from the LED mounting surface 19 side of the instrument main body 11, and the instrument main body 11 can be efficiently radiated.
Furthermore, since the radiation fin 21 has the chamfered portion 28 on the irradiation surface side, it is possible to make the air flow more easily, which works advantageously for the air flow.

As shown in FIG. 9, between the instrument main body 11 and the shade 14, the low pressure area | region A1 with low atmospheric pressure (temperature is low) arises on the shade 14 side, and atmospheric | air pressure is high on the instrument main body 11 side (temperature is high). A high atmospheric pressure region A2 occurs.
For this reason, since a difference in atmospheric pressure is generated around the single instrument body 11, air can easily flow and heat dissipation is improved.

Next, the optical characteristics of the lighting fixture 10 will be described.
As shown in FIG. 10, the shade 14 has a reflecting surface 33 that is inclined at an inclination angle θ <b> 2 of, for example, 15 degrees or more around the opening 24 of the bottom plate 23.
Therefore, since the reflecting surface 33 is inclined, the light from the LED unit 13 can be actively reflected toward the construction surface 1 side, and the glare is taken into consideration, and both the light shielding and the instrument efficiency can be considered. .
Note that the angle of inclination of the reflecting surface 33 is not necessarily this angle.

As shown in FIG. 11, the gap between the radiating fin 21 and the shade 14 is formed so as to decrease from the LED mounting surface 19 toward the construction surface 1 side, and the radiating fin 21 has a chamfered portion 28. Therefore, light from the LED unit 13 is not directly received.
Therefore, since the shadow of the radiation fin 21 is unlikely to be generated on the shade 14 and the shadow becomes gentle as it approaches the construction surface 1 side, it is difficult to recognize the presence, so that the appearance design of the shade 14 can be improved.

In addition, among the light components reflected on the inner peripheral surface of the shade 14, the light component that has passed through the radiation fin 21 does not form a shadow.
On the other hand, when the gap between the heat dissipating fin and the shade is formed so as to be constant from the LED mounting surface to the construction surface 1 side or widen toward the construction surface 1 side, the light from the LED unit is Pass directly through the apex of the radiating fin.
Therefore, the shadow 34 of the radiation fin is generated on the shade.

As shown in FIG. 12, the light from the LED unit 13 is emitted downward from the opening 24 of the shade 14 and is reflected by the reflecting surface 33 of the shade 14 facing the LED unit 13 to be a secondary reflecting surface. After the tool body 11 is irradiated, the process proceeds to the construction surface 1.
At this time, the LED unit 13 is attached toward the floor surface. However, since the instrument body 11 is dyed white, a lot of light reflected by the shade 14 is reflected toward the construction surface 1.
Therefore, by directing light to the construction surface 1 by the reflecting surface 33 of the shade 14, indirect illumination can be produced. Since the shade 14 is a transmission shade, not only the light is directed to the construction surface 1, but the shade 14 The whole area is illuminated and the appearance design can be improved.

As described above, according to the lighting apparatus 10 of the first embodiment, indirect illumination can be produced by turning light to the construction surface 1 by the reflecting surface 33 of the shade 14, and the shade 14 is a transmissive shade. In addition to the light turning to the construction surface 1 side, the light is turned to the entire shade 14.
Thereby, according to the lighting fixture 10 of 1st Embodiment, it can reduce in size, can provide light to the construction surface 1 side, and can improve an external appearance design.

  Moreover, according to the lighting fixture 10 of 1st Embodiment, since the reflective surface 33 inclines, while being able to reflect the light from LED unit 13 toward the construction surface 1 side actively, consideration of glare It is possible to consider both shading and appliance efficiency.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment which concerns on this invention is demonstrated.
Note that, in the following second embodiment, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, or the description is simplified. Omitted.

As shown in FIG. 13, the lighting fixture 50 according to the second embodiment of the present invention includes a fixture main body 51, an LED unit 13 attached to the bottom rear surface of the fixture main body 51, the side of the fixture main body 51, and the LED unit 13. And a shade 14 covering the.
The lighting fixture 50 does not have a heat radiating fin in the fixture body 51.

  In the lighting fixture of the present invention, the LED, the hook sealing member, the power feeding unit, the insulating sheet, the fixed body, the lens, the frame, and the like are not limited to the above-described embodiments, and can be appropriately modified or improved. It is.

DESCRIPTION OF SYMBOLS 1 Construction surface 10,50 Lighting fixture 11,51 Appliance main body 12 LED (light emitting element)
14 SEED 19 LED mounting surface (mounting surface)
20 Inclined surface 33 Reflecting surface

Claims (2)

An instrument body that is formed into a bottomed cylinder and is installed on the construction surface side;
A light emitting element attached to the bottom back of the instrument body;
A side covering the instrument body and a shade covering the light emitting element;
The instrument body has an inclined surface laterally from the mounting surface of the light emitting element,
The said shade is a lighting fixture which has a reflective surface which faces the front surface of the said light emitting element. The lighting fixture according to claim 1,
The said reflecting surface is a lighting fixture which inclines in the attachment surface direction of the said light emitting element of the said fixture main body.

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