JP3733653B2 - lighting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture, and more particularly, to a lighting fixture in which an illuminance sensor is provided on a fixture body.
[0002]
[Prior art]
3 and 4 show a conventional lighting fixture, and this lighting fixture includes a fixture main body 1, an illuminance sensor 2, and a detection range adjustment tool 3 thereof.
[0003]
The appliance main body 1 has a substantially box shape opened on one side, and a lamp 4 is arranged inside facing the opening, and is attached to the ceiling with the opened side as a lower side. A lighting device (not shown) or the like is accommodated. In addition, a small-diameter concave portion 1a that is recessed upward is provided on the lower surface on one end side of the instrument body 1, and a small opening 1b is provided on the back side of the concave portion 1a.
[0004]
The illuminance sensor 2 is disposed inside the instrument body 1 facing the small opening 1b of the instrument body 1, and adjusts the output of the luminaire 1 according to the illuminance level by its output, and is on the front side. On the lower surface side, a detection range adjuster 3 for limiting the detection range is provided.
[0005]
The detection range adjuster 3 is made of a resin and has a substantially cylindrical shape having a predetermined inner diameter D1, and is engaged with a peripheral end of the small opening 1b of the instrument body 1 on the lower outer surface which is one end side thereof. A stop portion 3a is provided, and a light shielding portion 3b having a diameter D2 that shields a part of light incident on the illuminance sensor 2 at a substantially central portion, particularly light incident from directly below is provided inside the vicinity of the locking portion 3a. The amount of light incident on the detection range adjustment tool 3 is limited by a support portion 3c extending from the peripheral wall. In other words, the detection range adjuster 3 has a light shielding portion 3b formed at the center of a support portion 3c formed in a substantially cross shape from the peripheral wall on the inner bottom side and on the lower end side of the light shielding portion 3b. The peripheral wall side is formed so as to open except for the support portion 3c, so that light passes from below to above. Such a detection range adjuster 3 is fixed to the fixture body 1 by locking its locking portion 3 a to the peripheral end of the small opening 1 b of the lighting fixture 1, and the lower surface of the light shielding portion 3 b and the illuminance sensor 2. The distance from the side sensor lens is set to a predetermined distance h.
[0006]
The luminaire configured as described above performs dimming control on the luminaire 1 according to the illuminance level by measuring reflected light or the like incident on the illuminance sensor 2 in an installation environment of a predetermined condition, In this condition, the illuminance on the desk surface, floor surface, etc. is made to be substantially constant.
[0007]
[Problems to be solved by the invention]
However, in the conventional lighting fixture configured as described above, the detection range adjuster 3 is fixed to the fixture main body 1, and the light shielding portion 3b needs to be set for each environment according to the installation environment. For this reason, there has been a problem that it is not possible to respond flexibly to changes in the environment. Further, the detection range adjustment tool 3 on the lower surface side of the sensor lens of the illuminance sensor 2 has an opening except for the light shielding part 3b and the support part 3c inside thereof, and the sensor lens is easily contaminated, and the detection range adjustment tool 3 is fixed to the peripheral end of the small opening 1b provided on the back side of the small-diameter concave portion 1a, and the light-shielding portion 3b is supported and provided at the center by the support portion 3c. In order to clean the lens, it is only on the lower surface side of the small-diameter concave portion 1a and from a slight opening around the light-shielding portion 3b of the detection range adjusting tool 3, that is, from a small opening equal to or less than a quarter of the small opening 1b. There was a problem that it could not be done and maintenance was difficult.
[0008]
The present invention has been made in view of the above-described problems, and an object thereof is to provide a luminaire including an illuminance measuring unit that can easily cope with a change in an installation environment and is easy to maintain. .
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides the illumination sensor 2 in the instrument body 1 facing the small opening 1b provided on the outer surface of the instrument body 1 in the invention described in claim 1. In the illuminating device, the small opening 1b has a substantially cylindrical shape, and an outer surface on one end side is provided with a locking portion 3a to the peripheral end of the small opening 1b of the device main body 1 and the illuminance on the inner side on the other end side. The light-shielding part 3b which restrict | limits the detection range of the sensor 2 is provided in the approximate center, and the detection range adjustment tool 3 by which the peripheral part was made into the translucent opening 3d is mounted | worn, and the latching part 3a vicinity of this detection range adjustment tool 3 The filter 5 for adjusting the transmittance of light incident on the detection range adjuster 3 is detachably attached to the inside of the sensor.
[0010]
According to a second aspect of the present invention, in the luminaire according to the first aspect, a female screw 3e is provided on the inner side in the vicinity of the engaging portion 3a of the detection range adjusting tool 3, and the female screw 3e is provided on the outer surface of the filter 5. This is characterized in that a male screw 5a to be screwed onto is provided.
[0011]
The invention according to claim 3 is characterized in that, in the lighting apparatus according to claim 1 or 2, the detection range adjuster 3 is formed of an elastic body.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an embodiment of a lighting fixture of the present invention, and this lighting fixture includes a fixture main body 1, an illuminance sensor 2, a detection range adjuster 3, and a filter 5. It is configured.
[0013]
The luminaire 1 has a substantially box-like shape opened to one side, and a lamp 4 is arranged inside facing the opening, and is attached to the ceiling with the opened side as a lower side. In addition, a lighting device (not shown) for lighting the lamp 4 and a control unit (not shown) for performing blinking and dimming control of the lamp 4 are accommodated in the inside thereof. A small opening 1b having a small diameter is provided on the lower surface of the.
[0014]
The illuminance sensor 2 is disposed inside the instrument body 1 facing the small opening 1b of the instrument body 1, measures the illuminance level, transmits the output to the control unit, and outputs the output of the luminaire 1 according to the illuminance level. The controller controls the dimming of the luminaire 1 so as to increase the output of the luminaire 1 when the illuminance level is low and to decrease the output when the illuminance level is high. It operates so as to make the illuminance on the upper surface and the floor surface substantially constant. In addition, a detection range adjuster 3 for limiting the detection range is provided on the lower surface side that is the front surface side of the illuminance sensor 2.
[0015]
The detection range adjuster 3 is formed of a translucent member, has elasticity, and is formed in a substantially cylindrical shape with the upper surface having a predetermined inner diameter D1 closed. Further, a locking portion 3a that is locked to the peripheral end of the small opening 1b of the instrument body 1 is provided on the lower outer surface that is one end side, and a female screw 3e is provided inside the vicinity of the locking portion 3a. Is provided. In addition, a light shielding portion 3b having a diameter D2 that shields light that is part of light incident on the illuminance sensor 2, particularly light that is incident from directly below, is provided at the substantially central portion on the upper surface side that is the other end side of the detection range adjuster 3. However, it is formed by painting or the like, and an annular portion outside the light shielding portion 3b is a light transmitting opening 3d through which light to the illuminance sensor 2 passes. And such a detection range adjustment tool 3 is attached to the fixture main body 1 with the locking portion 3a locked to the peripheral end of the small opening 1b of the lighting fixture 1, and the light shielding portion 3b provided on the upper surface thereof. And the sensor lens on the lower surface side of the illuminance sensor 2 are set to a predetermined distance h.
[0016]
The filter 5 is formed of a translucent member, is formed in a substantially plate shape with a rising portion 5b at the peripheral end, and an internal thread provided on the inner surface side of the detection range adjuster 3 on the outer surface of the rising portion 5b. A male screw is provided to be screwed onto. This filter 5 adjusts the transmittance to limit the amount of light incident on the inside of the detection range adjuster 3, and is formed of various resins having substantially the same molding conditions in order to change the transmittance. Therefore, it is configured to be able to cope with a wider range of conditions by selecting and using an appropriate one according to the mounting environment, or by printing on the surface as necessary.
[0017]
In the luminaire configured as described above, the inner diameter D1 of the detection range adjuster 3, the diameter D2 of the light shielding portion 3b, the distance h between the illuminance sensor 2 and the light shielding portion 3b, and the transmission of the filter 5 according to the installation environment. The illuminance measurement unit is configured by changing the rate, and the output of the luminaire 1 is adjusted according to the illuminance level. If the mounting environment changes, the filter 5 is removed from the detection range adjuster 3 and replaced. The detection range adjusting tool 3 made of an elastic body is removed from the instrument main body 1 and exchanged so that the control unit or the like can be dealt with without any change.
[0018]
Since it is configured in this manner, in the lighting apparatus according to the present embodiment, the filter 5 is detachably attached to the detection range adjuster 3. Therefore, if the installation environment changes, the filter 5 is connected to the detection range adjuster. Since the detection range adjuster 3 is made of an elastic body, the detection range adjuster 3 can be easily removed from the instrument body 1 and replaced without changing the control unit or the like. It can easily cope with changes in the mounting environment. Furthermore, since the filter 5 and the detection range adjustment tool 3 are not opened on the front side of the sensor lens of the illuminance sensor 2, the sensor lens is not easily soiled, and the filter 5 and the detection range adjustment tool 3 can be easily detached from the instrument body 1. Therefore, the sensor lens of the illuminance sensor 2 can be cleaned using the entire small opening 1b by removing them, and the maintainability is improved. In addition, since the filter 5 is attached to the lower end of the detection range adjuster 3, the inside of the detection range adjuster 3 is hardly soiled, and there is almost no need to clean the inside of the detection range adjuster 3, and the filter 5 If the outer surface of the detection range adjuster 3 is cleaned, the light transmittance can be maintained in a desired state, and the maintainability is further improved.
[0019]
【The invention's effect】
Since the present invention is configured as described above, in the first and second aspects of the present invention, the filter is detachable from the detection range adjuster. The filter can be removed and replaced from the detection range adjuster, or the detection range adjuster can be removed from the instrument body and replaced, making it easy to respond to changes in the mounting environment without changing the control unit etc. . Furthermore, since the filter and the detection range adjuster are not open on the front side of the illuminance sensor, the illuminance sensor is difficult to get dirty, and since the filter and the detection range adjuster can be removed from the instrument body, the illuminance sensor can be cleaned. Maintenance can be improved by removing them and using the entire small opening.
[0020]
In the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, since the detection range adjuster is made of an elastic body, if the mounting environment changes, the detection range adjustment The tool can be easily removed from the tool body and exchanged, and a wider range of changes in the mounting environment can be accommodated.
[Brief description of the drawings]
1A and 1B show an embodiment of a lighting fixture according to the present invention, in which FIG. 1A is a perspective view, and FIG. 1B is a side view of a cross-sectional state of a detection range adjuster and a filter.
FIGS. 2A and 2B show the detection range adjuster of the above, in which FIG. 2A is a side view in a cross-sectional state, and FIG. 2B is a plan view;
FIGS. 3A and 3B show a conventional lighting apparatus, in which FIG. 3A is a perspective view, and FIG. 3B is a side view of a partial sectional state of a detection range adjuster and an illuminance sensor unit;
FIGS. 4A and 4B show the detection range adjuster of the above, where FIG. 4A is a side view and FIG. 4B is a plan view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lighting fixture 1b Small opening 2 Illuminance sensor 3 Detection range adjustment tool 3a Locking part 3b Light-shielding part 3d Translucent opening 3e Female screw 5 Filter 5a Male screw

Claims (3)

In a lighting fixture in which an illuminance sensor is disposed in the fixture body facing the small opening provided on the outer surface of the fixture body, the small opening is substantially cylindrical and the small opening of the fixture body is formed on the outer surface on one end side. A detection range adjuster provided with a locking portion to the peripheral end and a light blocking portion provided in a substantially central portion on the inner side of the other end side to limit the detection range of the illuminance sensor, and a peripheral portion thereof being a translucent opening. A lighting fixture, wherein a filter for adjusting the transmittance of light incident on the detection range adjuster is detachably mounted inside the vicinity of the engaging portion of the detection range adjuster. The lighting apparatus according to claim 1, wherein a female screw is provided on an inner side in the vicinity of the engaging portion of the detection range adjuster, and a male screw that is screwed to the female screw is provided on an outer surface of the filter. The lighting device according to claim 1, wherein the detection range adjuster is formed of an elastic body.

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