JP2001043722A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control radiation range, while preventing the light of a lamp from coming in sight by providing a movable light shielding member for shielding the light of the lamp and a movable reflective plate, supported rotatably on a support member or the movable light shielding member and for reflecting and controlling the light from the lamp to a specified direction, and by individually changing the angles of the movable light shielding member and the movable reflective plate. SOLUTION: The height of a movable shade 2 is determined approximately by changing the angle of a strut 4 in relation to a base, the angles of the strut 4 and the movable shade 2 are changed, so as to prevent the direct light of a lamp 1 from coming in sight and also make a necessary radiation range, and the position of the movable shade 2 is determined. The light A in the direction of eyes of a user, out of the light radiated from the lamp 1 is shielded by the movable shade 2, and the downward light B lights up the periphery of the hand. The angles of an upper movable reflective plate 8 and the movable shade 2 are changed, and the reflected light C1 obtained by the reflection of the light C advanced upward from the lamp 1 by the upper movable reflective plate 8 lights up the periphery of the hand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luminaire, and more particularly to a luminaire capable of controlling an irradiation range while changing the angle of a shade such as a desk lamp to prevent light from a lamp from entering a field of view.

[0002]

2. Description of the Related Art As a conventional lighting fixture capable of changing the angle of a shade, for example, there is a general desk lamp shown in FIGS. FIG. 9 is a perspective view of a conventional desk lamp, and FIG.
10 is a sectional view of FIG. 9 and 10, reference numeral 15 denotes a shade which is a movable light shielding member, 1 denotes a fluorescent lamp which is a lamp attached via a socket fixed to the shade 15, and 16 denotes a light which is attached to the shade 15 and reflects the light of the fluorescent lamp 1. The reflecting plate 4 is a supporting column as a support member, and 5 is a shade rotating mechanism for rotatably supporting the shade 15 on the supporting column 4. Reference numeral 6 denotes a base, and reference numeral 7 denotes a column rotating portion that rotatably supports the column 4.

In such a configuration, when the illuminance of the object or the range of irradiation is changed, the reflection plate 16 and the shade 1 are used.
Since the angle 5 of the lamp 1 is changed, the height of the lamp 1 is determined by changing the angle of the column 4 and the angle of the shade 15 is changed centering on the shade rotating mechanism 5, so that the direct light of the lamp 1 and the reflector 16 are changed. The object was illuminated with the reflected light from the object.
In FIG. 10, the reflected light is indicated by a solid line, and the direct light is indicated by an alternate long and short dash line.

As shown in FIG. 11, in the case of a downlight which is not a stand type, as shown in FIG. 11, a glare cap 18 for blocking the direct light of the lamp 1 mounted on a shade 17 also serving as a reflection surface is provided, or the lamp itself is provided. Some have a shield equivalent to a glare cap.

[0005]

In the conventional lighting apparatus having a shade whose angle can be changed as described above, if the shade 15 is brought closer to the object in order to increase the illuminance of the object, a large area such as a distant area can be illuminated. If the angle of the shade 15 is changed to irradiate a large area such as a distant place, the light of the lamp 1 may enter the field of view as shown in FIG.

Further, the performance of the fluorescent lamp depends on the ambient temperature, and the luminous flux becomes maximum when the lamp ambient temperature is at a certain temperature (Ta) as shown in FIG. On the other hand, the reflection plate 16
Since the distance between the lamp 1 and the lamp 1 is generally small, the flow of air is poor, and the heat generated by the lamp 1 causes the heat to be trapped and the temperature around the lamp to easily rise. Therefore, when a fluorescent lamp is used as the lamp 1, there is a problem that the luminous flux of the fluorescent lamp decreases due to an increase in the temperature around the fluorescent lamp.

In the case where a glare cap 18 for shielding the direct light of the lamp 1 and the light reflected by the inner surface of the shade 17 is provided as shown in FIG. 11, the efficiency is low because most of the effective direct light is blocked. There is a problem that it takes time to replace the lamp.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can control an irradiation range while preventing light from a lamp from entering a field of view. It is an object of the present invention to obtain an efficient lighting device which can prevent the occurrence of a problem, has excellent lamp exchangeability, and does not block effective direct light.

[0009]

A lighting apparatus according to the present invention is rotatably supported by a support member and rotatable by the support member or the movable light shield member for blocking light from a lamp. And a movable reflector that controls the reflection of light from the lamp in a required direction, wherein the angles of the movable light shielding member and the movable reflector can be independently changed.

The movable light-shielding member is formed by forming a band-like member into a substantially ring shape so as to cover the periphery of the lamp.

Further, the inner surface of the movable light-shielding member is formed to have a high reflectance surface and to be spread downward to form a shade.

Further, the movable reflection plate is provided above the movable light shielding member.

Further, the movable reflection plate is provided below the movable light shielding member.

Further, the reflecting surface of the movable reflecting plate is a mirror surface.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 is a perspective view of a stand-type lighting device according to Embodiment 1, FIG. 2 is a cross-sectional view of FIG. 1 and a diagram showing a use state, and FIG. 3 is a diagram showing a comparison of an irradiation state. In FIGS. 1 and 2, reference numeral 1 denotes a lamp, and 2 denotes a movable shade which is a light shielding member whose angle can be independently changed. A socket 3 which is formed in a substantially ring shape so as to block predetermined light, covers the periphery of the lamp 1 and mounts the lamp 1 is provided. Reference numeral 4 denotes a support as a support member, and reference numeral 5 denotes a shade rotating mechanism for rotatably supporting the movable shade 2 on the support 4. Reference numeral 6 denotes a base, and reference numeral 7 denotes a column rotating portion that rotatably supports the column 4. Reference numeral 8 denotes an upper movable reflector that is rotatably supported by an upper reflector rotating unit 9 provided on the upper part of the movable shade 2, and the reflection surface is a mirror surface.

Next, adjustment of the lighting equipment will be described with reference to FIGS. First, the angle of the column 4 with respect to the base is changed to roughly determine the height of the movable shade 2, so that the direct light of the lamp 1 does not enter the eyes, and the angle between the column 4 and the movable shade 2 is set so that the required irradiation range is obtained. To determine the position of the movable shade 2. Here, of the light emitted from the lamp 1, light A in the direction of the user's eyes is blocked by the movable shade 2, and downward light B illuminates the hand.

Next, the light C traveling upward from the lamp 1 by changing the angle between the upper movable reflector 8 and the movable shade 2 is reflected by the upper movable reflector 8 to illuminate the hand.

Here, the irradiation state of the light from the lamp will be described with reference to FIG. 3 in comparison with the conventional example. FIG. 3A is an irradiation state of the lighting apparatus according to the first embodiment. FIG. 3B is an irradiation state of a conventional example in a normal use state, and FIG. Shows the irradiation state. In the figure, the position of the movable shade 2 is the same. The solid line indicates the reflected light,
Cm indicates the maximum spread range of the reflected light. The dashed line indicates the direct light, and Bm indicates the maximum spread range of the direct light.

3 (a) and 3 (b), the direct light Bm illuminates substantially the same range, but in the invention of the first embodiment shown in FIG. 3 (a), the lamp 1 is moved while the angle of the movable shade 2 remains unchanged. By changing the angle of the movable reflecting plate 8 while approaching the target object, the reflected light Cm is prevented from entering the eyes, so that the reflected light Cm can reach a distant direction on the user side and the irradiation range can be widened. Further, it is possible to prevent the light of the lamp 1 from entering the eyes with the movable shade 2 while irradiating a wide range with the lamp 1 at a high position. However, in the conventional example, if the angle of the reflecting mirror is changed to widen the irradiation range shown in FIG.
As shown in (c), since the reflector 16 and the movable shade 15 are integrated, the angle of the shade 15 also needs to be changed, so that the direct light Bm enters the eyes. Further, although not shown, when the lamp 1 is set at a high position to irradiate a wide range, the direct light Bm enters the eyes. Therefore, FIG.
The irradiation range cannot be expanded as shown in FIG.

As described above, the irradiation range can be controlled by the upper movable reflector 8 while preventing the lamp 1 from entering the field of view by the movable shade 2, and the lamp can be controlled by the upper movable reflector 8 while bringing the lamp 1 closer to the object. It is possible to irradiate light from a large area such as a distant area with the light from the lamp 1, and to prevent the light from the lamp 1 from entering the eyes with the movable shade 2 while illuminating a wide area with the lamp 1 at a high position. Further, since the upper part of the movable shade 2 is open and there is a gap with the upper movable reflecting plate 8, the heat of the lamp 1 is not kept, so that it is possible to prevent the luminous flux from dropping due to an increase in the lamp ambient temperature. Furthermore, effective illumination can be performed because effective direct light is not blocked. Further, since the upper movable reflection plate 8 is a mirror surface, it is specularly reflected, the irradiation range can be more strictly controlled, and the illumination rate of the illuminated surface can be increased.

In the above embodiment, the movable shade 2 is formed in a band-like light-shielding plate in a substantially ring shape so as to shield substantially horizontal predetermined light out of the direct light of the lamp 1. However, the inner surface of the movable shade 2 is made to have a high reflectivity surface, and is spread downward to form a shade as shown in FIG. 4, and reflects the direct light A downward (A1) and May be illuminated.

Further, in the first embodiment, the upper movable reflector 8 is rotatably provided above the movable shade 2, but the upper movable reflector 8 may be provided rotatably above the support post 4. .

Embodiment 2 FIG. In the first embodiment, the movable reflector is rotatably mounted on the upper part of the shade, but in the present embodiment, the movable reflector is further provided on the lower part.
FIG. 5 is a perspective view of a stand-type lighting device according to the second embodiment, FIG. 6 is a cross-sectional view of FIG. 5 showing a use state, and FIG. 7 is a diagram showing a comparison of an irradiation state. 5 and 6, the same or corresponding parts as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 10 denotes a lower reflector turning mechanism 11 provided at a lower portion of the movable shade 2 on the side opposite to the user.
Is a lower movable reflecting plate rotatably supported by the movable member.

Next, adjustment of the lighting equipment will be described with reference to FIGS. First, the height of the movable shade 2 is roughly changed by changing the angle of the support 4 with respect to the base, so that the light emitted from the lamp 1 is prevented from entering the eyes and the support 4 and the movable shade 2 are adjusted to have a required irradiation range. And the position of the movable shade 2 is determined. Here, of the light emitted from the lamp 1, light A in the direction of the user's eyes is blocked by the movable shade 2, and downward light B illuminates the hand.

Next, light C traveling upward from the lamp 1 by changing the angle between the upper movable reflector 8 and the movable shade 2 is reflected by the upper movable reflector 8 to illuminate the hand. Further, the light D that has traveled downward from the lamp 1 by changing the angle between the lower movable reflector 10 and the movable shade 2 is reflected by the lower movable reflector 10 to illuminate the hand.

Here, the irradiation state of light from the lamp 1 will be described with reference to FIG. 7 in comparison with the first embodiment. FIG. 7 (a)
FIG. 7B shows an irradiation state of the lighting apparatus according to Embodiment 1, and FIG.
Indicates the irradiation state of the second embodiment. In the figure, the position of the movable shade 2 is the same, and the irradiation direction is the reflected light in the case of the solid line, and the direct light is the dashed line. In the first embodiment, the direct light D on the side opposite to the user is often unnecessary as shown in FIG. 7A, but in the second embodiment, as shown in FIG. 10, reflected light D1 of light D downward
Is reflected to the user's side. The reflected light D1 overlaps with the direct light B, and the brightness at hand increases.

As described above, the light from the lamp irradiates a wider area in the required direction (user side) with the upper movable reflector, and the unnecessary light is emitted in the unnecessary direction (the opposite side of the user, Light toward the rear of the stand) can be reflected in a required direction to increase the illumination rate of the illuminated area.

In the first embodiment, the movable reflection plate is provided above the shade, and in the second embodiment, the movable reflection plate is provided above and below. However, as shown in FIG. The movable reflector 12 integrated vertically, not below, may be provided inside the movable shade 2. In this case, it is not possible to irradiate a large area as in the first embodiment. However, as in the second embodiment, a part of light in an unnecessary direction is directed The light can be reflected to increase the illumination rate of the illuminated area.

In Embodiments 1 and 2 described above, the stand-type lighting fixture has been described. However, the shade is a variable-angle lighting fixture. A similar effect can be obtained as long as it is formed in a substantially ring shape so as to block the direct light in the direction and covers the periphery of the lamp 1.

[0030]

As described above, according to the present invention, the movable light shielding member rotatably supported by the support member and shielding the light of the lamp, and the movable light shielding member is rotatably supported by the support member or the movable light shielding member. A movable reflector that is supported and controls the reflection of light from the lamp in a required direction, and the angles of the movable light-blocking member and the movable reflector can be independently changed, so that the lamp enters the field of view. , The irradiation range can be controlled, and the decrease in efficiency due to an increase in the ambient temperature of the lamp can be prevented.

Further, since the movable light shielding member is formed in a band shape in a substantially ring shape so as to cover the periphery of the lamp, effective illumination can be performed without blocking effective direct light.

Further, since the inner surface of the movable light-shielding member is formed to have a high reflectivity surface and is formed so as to extend downward and form a shade, light is reflected downward without being blocked by light, so that the illuminance of the illuminated area is increased. can do.

Further, since the movable reflection plate is provided above the movable light shielding member, it is possible to irradiate a wider area and to prevent a decrease in efficiency due to a rise in the ambient temperature of the lamp.

Further, since the movable reflection plate is provided below the movable light-shielding member, light in an unnecessary direction is reflected in a required direction, so that the illumination rate of the illuminated area can be increased.

Further, since the reflecting surface of the movable reflecting plate is a mirror surface, the illumination rate of the illuminated surface can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lighting fixture according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a cross-sectional view of FIG. 1 and a state of use.

FIG. 3 is a diagram showing a comparison of an irradiation state between the first embodiment of the present invention and a conventional example.

FIG. 4 is a cross-sectional view and a diagram showing a use state of the lighting apparatus according to the first embodiment of the present invention.

FIG. 5 is a perspective view of a lighting fixture according to Embodiment 2 of the present invention.

FIG. 6 is a diagram showing a cross-sectional view of FIG. 5 and a state of use.

FIG. 7 is a diagram showing a comparison of irradiation states between the second embodiment and the second embodiment of the present invention.

FIG. 8 is a cross-sectional view of a lighting fixture according to Embodiment 2 of the present invention.

FIG. 9 is a perspective view of a conventional lighting fixture.

FIG. 10 is a sectional view of FIG. 9;

FIG. 11 is a sectional view of a conventional downlight.

FIG. 12 is a diagram showing a use state of a conventional lighting fixture.

FIG. 13 is a conceptual diagram showing the relationship between the ambient temperature of the fluorescent lamp and the luminous flux.

[Explanation of symbols]

1 ramp, 2 movable shades, 4 columns, 8 upper movable reflector, 10 lower movable reflector.

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Claims (6)

[Claims] A movable light-blocking member rotatably supported by a support member for blocking light from a lamp; and a light from the lamp rotatably supported by the support member or the movable light-blocking member in a required direction. And a movable reflection plate for controlling reflection of the light, wherein an angle between the movable light shielding member and the movable reflection plate can be independently changed. 2. The luminaire according to claim 1, wherein the movable light shielding member is formed in a band-like shape in a substantially ring shape so as to cover the periphery of the lamp. 3. The luminaire according to claim 2, wherein an inner surface of the movable light shielding member has a high reflectance surface and is spread downward to form a shade. 4. The lighting apparatus according to claim 1, wherein the movable reflection plate is provided above the movable light shielding member. 5. The lighting apparatus according to claim 4, wherein the movable reflection plate is provided below the movable light shielding member. 6. The lighting fixture according to claim 1, wherein the reflecting surface of the movable reflecting plate is a mirror surface.