JP6233777B2 - LED lighting fixtures - Google Patents

Description

  The present invention relates to an LED lighting apparatus having an optical sensor.

2. Description of the Related Art Conventionally, there is known a lighting fixture that includes an optical sensor that detects ambient brightness and performs light distribution control in accordance with ambient brightness (see, for example, Patent Document 1).
As shown in FIG. 7, the lighting fixture 100 described in Patent Document 1 includes a disk-shaped chassis 102 attached to the ceiling surface 101 or the like. A translucent cover 103 having a disk shape and light diffusibility is attached to the chassis 102. A disc-shaped center cover 104 is detachably attached to the central portion of the translucent cover 103.

The chassis 102 is provided with an LED module 105, and a control unit (not shown) for controlling the LED module 105 is accommodated. The LED module 105 is provided with a lens 109 that collects the light emitted from the LED module 105 and emits the collected light in a predetermined direction. A circuit board 106 is attached to the chassis 102, and a sensor board 108 on which an optical sensor (illuminance sensor) 107 is mounted is connected. Further, the optical sensor 107 is exposed downward through a through hole provided in the center cover 104 located on the bottom surface portion of the lighting fixture.
Thereby, the control unit (not shown) adjusts the brightness of the light from the LED module 105 according to the illuminance detected by the optical sensor 107.

JP 2012-22849 A (FIG. 3)

In the luminaire 100 described in Patent Document 1 as described above, the central portion is covered with the center cover 104 and darkened. Therefore, if the optical sensor 107 is arranged in this portion, the optical sensor 107 is an LED module. It becomes difficult to be adversely affected by the light from 105.
However, when such a lighting fixture 100 is looked up from below, the center portion becomes dark due to the presence of the center cover. In order to prevent such a central part from becoming dark, it is conceivable to arrange a light source in a lighting fixture in the center cover 104, for example. However, in that case, the optical sensor may malfunction due to the influence of the light source arranged in the center cover 104. For this reason, when the light source is disposed on the bottom surface of the lighting fixture 100, there is a problem that the optical sensor cannot be disposed on the bottom surface.

  The present invention has been made to solve the conventional problems, and even if a light source is provided on the bottom surface of a lighting fixture, it does not adversely affect the optical sensor, maintains the sensing characteristics of the optical sensor well, and malfunctions. It aims at providing the LED lighting fixture which can be prevented.

The LED lighting apparatus according to the present invention is supported by extending from a side surface of the instrument main body having a side surface and a bottom surface, and guiding and emitting light from the first LED light emitting unit accommodated in the instrument main body. A first light-emitting part having a light guide plate, a second light-emitting part that transmits light from the second LED light-emitting part accommodated in the instrument main body and emits light from the bottom surface, and an optical sensor accommodated in the instrument main body, A light receiving hole provided in the bottom surface of the bottom surface corresponding to the location of the optical sensor, the light receiving hole being positioned at the second surface; than the lower surface of the position of the center lens for transmitting light of the first 2LED light emitting portion constituting the light-emitting portion, the second light emitting portion is one that is provided to protrude equal or toward the direction of illumination.

In the present invention, the light receiving hole is provided in the vicinity of the second light emitting unit on the bottom surface of the instrument main body, and is provided at the location of the bottom surface corresponding to the location of the photosensor.
For this reason, an optical sensor becomes difficult to receive the influence of a 2nd light emission part, and can provide the LED lighting fixture which has the effect that malfunction can be prevented.

The perspective view which looked at the state which attached the LED lighting fixture of embodiment which concerns on this invention to the ceiling surface from the downward direction The perspective view which looked at the LED lighting fixture of embodiment which concerns on this invention from upper direction Sectional view at position III-III in FIG. Explanatory drawing which shows the positional relationship of an upper LED light emission part (lower LED light emission part) and an upper light-guide plate (lower light-guide plate). Perspective view of LED lighting fixture cut at the light receiving hole position Cross section of the main part of the LED lighting fixture cut at the light receiving hole position Cross-sectional view of a conventional lighting fixture

Hereinafter, the LED lighting fixture of embodiment which concerns on this invention is demonstrated using drawing.
As shown in FIG. 1, the LED lighting fixture 10 of embodiment is attached to the ceiling surface 11, for example, and can be used for mainly illuminating the downward direction.
In the following description, the LED lighting fixture 10 is attached to the ceiling surface 11, and the ceiling surface 11 side is “upper” and the side opposite to the ceiling surface 11 (that is, the floor side) is “lower”.

First, the overall configuration of the LED lighting apparatus 10 will be outlined.
As shown in FIGS. 1 and 2, the LED lighting device 10 has a device body 20 attached to the ceiling surface 11.
An upper light guide plate 32 is disposed on the lower side of the instrument main body 20, and a white light-transmitting and reflective characteristic that supports the upper light guide plate 32 from the lower side is provided on the lower side of the upper light guide plate 32. An upper cover 33 of the system is attached to the instrument body 20.

A lower light guide plate 42 is disposed below the upper cover 33 in parallel with the upper light guide plate 32, and the lower light guide plate 42 is opaque so as to support the lower light guide plate 42 from below. A white lower cover 43 having reflection characteristics is provided. The upper light guide plate 32 is provided to extend outward from the side surface of the instrument body 20.
The lower cover 43 has a ring shape in plan view from below, and a ring-shaped center lens (transmission panel) 52 is adjacent to the lower cover 43 on the inner side surrounded by the lower cover 43. It is provided along the inner periphery of 43.
A ring-shaped center cover 60 is provided inside the ring-shaped center lens 52, and a disk-shaped lid 61 is detachably attached to the inside of the center cover 60. The lower cover 43, the center lens 52, the center cover 60, and the lid 61 in plan view form the bottom surface of the LED lighting apparatus 10.
The center cover 60 is provided with a light receiving hole 62 for an optical sensor 63 (see FIG. 5).

Hereinafter, each component will be described in detail.
As shown in FIGS. 2 and 3, the instrument main body 20 is formed in a disc shape as a whole with a metal such as aluminum, for example. In the center of the instrument main body 20, there is an opening 21 for an attachment adapter 22 attached to a hook ceiling (not shown) attached to the ceiling surface 11.
The instrument main body 20 is bent outwardly from the outer peripheral end of the flat portion 23 at the center so as to be inclined downward, and a standing wall (side surface) 24 is formed. The standing wall 24 is provided with a horizontal portion 25 by bending the lower end portion outward.

The standing wall 24 corresponds to the arrangement of an upper LED light emitting unit (first LED light emitting unit) 31 described later, and is formed in, for example, a hexagonal shape in plan view, and each standing wall 24 is formed in a planar shape. Note that a plurality of (for example, three) elastic members 26 are attached to the flat portion 23.
Therefore, the lid 61 is removed, and the attachment adapter 22 is attached to the hooking ceiling to be electrically and mechanically connected, and the instrument body 20 is attached to the ceiling surface 11. At this time, the elastic member 26 is elastically deformed between the instrument body 20 and the ceiling surface 11 to prevent the instrument body 20 from wobbling.

As shown in FIG. 3, an upper light emitting unit (first light emitting unit) 30 is provided inside the instrument body 20. The upper light emitting unit 30 includes an upper LED light emitting unit 31 and an upper light guide plate 32.
The upper LED light emitting unit 31 includes an LED chip 311 and an LED substrate 312 on which the LED chip 311 is mounted.
The upper LED light emitting portions 31 are provided on the inner side of the instrument main body 20 so as to be in contact with the lower surface of the flat portion 23, and six are provided corresponding to the arrangement of the standing walls 24 (here, hexagons). .

An upper cover 33 is attached to the instrument body 20 below the upper LED light emitting unit 31. The upper cover 33 includes a ring-shaped horizontal support portion 331 attached to the instrument body 20 and extending horizontally outward, and an inclined support portion 332 that rises outward from the outer peripheral end of the horizontal support portion 331.
An upper end 333 of the inclined support portion 332 faces the horizontal portion 25 of the instrument body 20, and the upper light guide plate 32 is supported between the horizontal portion 25 of the instrument body 20 and the upper end 333 of the upper cover 33. Yes.

The upper light guide plate 32 has an overall disc shape and has a hollow portion (not shown) at the center. The hollow portion is formed in a hexagonal shape corresponding to the upper LED light emitting portion 31 supported by the instrument body 20 and arranged in a hexagonal shape. The upper light guide plate 32 can be controlled in light distribution by providing ribs or printing on the surface.
The end surface on the hollow portion side of the upper light guide plate 32 becomes an incident end surface 321 facing the LED chip 311 of the LED substrate 312 (see FIG. 4).

As shown in FIGS. 1 and 3, the lower cover 43 is supported by the instrument body 20 below the upper cover 33. A lower light guide plate 42 is supported between the upper cover 33 and the lower cover 43. The lower light guide plate 42 is provided to extend outward from the side surface of the instrument body 20.
As shown in FIG. 3, the lower light guide plate 42 is supported between the lower surface of the horizontal support portion 331 of the upper cover 33 and the upper end 431 of the lower cover 43.
Although the lower light guide plate 42 is smaller than the upper light guide plate 32, the lower light guide plate 42 has the same configuration as the above-described upper light guide plate 32, and thus detailed description thereof will be omitted.

A lower light emitting unit 40 is provided between the upper cover 33 and the lower cover 43. The lower light emitting unit 40 includes a lower LED light emitting unit 41 and a lower light guide plate 42.
The lower LED light emitting unit 41 includes an LED chip 411 and an LED substrate 412 on which the LED chip 411 is mounted. The LED chip 411 is opposed to the incident end face 421 of the lower light guide plate 42 (see parentheses in FIG. 4).

The lower cover 43 is opaque, and has a pressing portion 432 whose upper end 431 contacts the lower light guide plate 42 and a top plate portion 433 connected to the pressing portion 432.
Above the center lens 52, there is provided a second light emitting unit 50 that emits light in a direction orthogonal to the emission direction (horizontal direction) of the upper LED light emitting unit 31 and the lower LED light emitting unit 41, that is, downward. Yes.

The second light emitting unit 50 includes a second LED light emitting unit 51, a center lens 52 provided adjacent to the center cover 60, and a tube part 53 provided between the second LED light emitting unit 51 and the center cover 60.
As shown in FIGS. 5 and 6, the second LED light emitting unit 51 can be formed by arranging a plurality of LED chips 511 in a ring shape on a ring-shaped LED substrate 512. It is suitable for. A center lens 52 is attached in the irradiation direction (downward) of the second LED light emitting unit 51.
Therefore, the light emitted from the second LED light emitting unit 51 is light distribution controlled through the center lens 52, and is irradiated and illuminated mainly directly below.

The optical sensor 63 is provided inside (upper side) of the light receiving hole 62 provided in the center cover 60. That is, the optical sensor 63 is disposed on the inner side (center side) of the cylindrical portion 53, is accommodated in the instrument main body 20, and is disposed toward the light irradiation direction (downward) of the second light emitting unit 50 through the light receiving hole 62. ing.
The optical sensor 63 is connected to the power supply device 27 that controls the light distribution of the upper light emitting unit 30, the lower light emitting unit 40, and the second light emitting unit 50, and based on the detection signal transmitted from the optical sensor 63 to the power supply device 27. The power supply device 27 controls each light emitting unit. The power supply device 27 is housed inside the instrument body 20.

As shown in FIG. 6, the lower surface 601 of the center cover 60 is formed to project at least as much as the lower surface (front surface) 521 of the center lens 52 in the direction (downward) illuminated by the second light emitting unit 50. That is, the lower surface 601 of the center cover 60 is located on the same surface as the lower surface 521 of the center lens 52 or below the lower surface 521 of the center lens 52.
Therefore, the lower surface 601 of the center cover 60 is located on the floor surface side (downward) most of the LED lighting fixtures 10 attached to the ceiling surface 11.

The effect of the LED lighting fixture 10 is demonstrated.
In the LED lighting device 10, the device body 20 accommodates the upper light emitting unit 30. The upper light emitting unit 30 includes an upper LED light emitting unit 31 and an upper light guide plate 32 disposed on the standing wall 24 of the instrument body 20 so that the incident end surface 321 faces the emission direction of the upper LED light emitting unit 31. .
The instrument body 20 houses the second light emitting unit 50. The second light emitting unit 50 is provided adjacent to the second LED light emitting unit 51, the central cover 60 of the instrument body 20, and transmits the light of the second LED light emitting unit 51, and the second LED light emitting unit 51 and the center. And a cylindrical portion 53 provided between the cover 60 and the cover 60.
Furthermore, the instrument main body 20 is disposed inside the cylindrical portion 53, and a portion corresponding to an arrangement position of the optical sensor 63 arranged in the light emitting direction of the second light emitting unit 50 and the optical sensor 63 in the central cover 60. And a light receiving hole 62 provided in the.

The center cover 60 is provided so as to protrude at least equal to the lower surface 521 of the center lens 52 in the direction illuminated by the second light emitting unit 50.
Further, the position of the light receiving hole 62 is provided so as to protrude from the second light emitting unit 50, that is, the position of the lower surface 521 of the center lens 52 in the direction in which the second light emitting unit 50 illuminates.
For this reason, since the optical sensor 63 detects the ambient brightness through the light receiving hole 62 provided in the center cover 60, the light from the upper light emitting unit 30, the lower light emitting unit 40, and the second light emitting unit 50 is detected. It is less affected and can prevent malfunction.

The LED lighting apparatus of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
For example, in the above-described embodiment, the case where the first light emitting unit is the upper light emitting unit 30 is illustrated, but the same applies to the case where the first light emitting unit is the lower light emitting unit 40.
In the above-described embodiment, the circular fixture body has been described. However, the present invention may be used for a lighting fixture or the like configured such that the light guide plate extends from the opposite side surfaces of the square fixture body. .

DESCRIPTION OF SYMBOLS 10 LED lighting fixture 20 Appliance main body 24 Side surface 30 Upper light emission part (1st light emission part)
31 Upper LED light emitting part (first LED light emitting part)
32 Light guide plate 321 Incident end face 50 Second light emitting part 51 Second LED light emitting part 52 Center lens (transmission panel)
53 Tube portion 60 Bottom surface 63 Optical sensor 62 Light receiving hole

Claims (1)

An instrument body having side and bottom surfaces;
A first light-emitting part having a light guide plate that extends from the side surface of the instrument body and is supported and guides and emits light from the first LED light-emitting part accommodated in the instrument body;
A second light emitting unit that transmits light from the second LED light emitting unit housed in the instrument body and emits light from the bottom surface;
An optical sensor housed in the instrument body;
In the bottom surface, provided near the second light emitting unit, and provided with a light receiving hole provided in a location of the bottom surface corresponding to the location of the photosensor,
Position of the light receiving hole, than the position of the lower surface of the center lens for transmitting light of the first 2LED light emitting portion constituting the second light emitting section, provided the second light emitting portion protrudes above same toward the direction of illumination LED lighting fixtures.

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