JP5213253B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire that reduces glare by attaching a glare cut cap to a high-intensity lamp.

Conventionally, a lighting fixture to which an antiglare device for reducing glare is attached has been proposed (see, for example, Patent Document 1).
As shown in FIG. 8A, in this lighting fixture 100, a high-intensity lamp 101 that is a light source includes an inner tube 102. The inner tube 102 has a discharge tube 103 inside, and the outer side is surrounded by a protective tube 104 for preventing bursting at an interval. The protective tube 104 is surrounded by the reflection plate 105.

As shown in FIG. 8B, a light shielding member 107 as an antiglare device is attached to the center of the opening 106 of the reflecting plate 105. The light shielding member 107 includes a hemispherical cover cap 108 and a cylindrical portion 109, and an antiglare collar 110 that projects obliquely is integrally formed at the end of the cylindrical portion 109.
The light shielding member 107 is attached to the lamp 101 by holding a bulging portion 112 provided at the tip of the protective tube 104 at a step portion 111 at the boundary between the cover cap 108 and the cylindrical portion 109.

Japanese translation of PCT publication No. 2008-529246 (FIG. 1)

  However, in the conventional lighting apparatus 100 as described above, the light emitted from the high-intensity lamp 101 is blocked by the collar 110, and the blocked light is absorbed or returned to the reflected lamp. There has been a problem that the amount of light emitted from the light source decreases.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a lighting apparatus that can surely reduce glare without reducing the amount of light applied.

  The luminaire of the present invention includes a high-intensity lamp, a reflector that reflects light emitted from the high-intensity lamp to a predetermined irradiation range, a glare cut cap body having an opening at one end, and an opening side end of the glare cut cap body A glare-cut cap having an auxiliary reflector that protrudes outward from the portion, and the opening of the glare-cut cap body is attached to the tip of the high-intensity lamp at a predetermined interval. The auxiliary reflecting plate has a parabolic auxiliary reflecting surface that is focused on the center of the high-intensity lamp, and the axis of the auxiliary reflecting surface exceeds 0 ° with respect to the central axis of the high-intensity lamp. To be inclined within a range of less than 90 °.

  With this configuration, when the glare cut cap attached to the high-intensity lamp blocks the direct light emitted from the center of the high-intensity lamp and reduces glare, the auxiliary reflector is provided around the opening of the glare cut cap. The auxiliary reflecting surface reflects the blocked light to the reflecting plate, and the light reflected by the reflecting plate is irradiated to the outside. At this time, the shape of the auxiliary reflecting surface of the auxiliary reflecting plate is a parabolic shape focusing on the center of the high-intensity lamp, and the axis of the parabolic surface is greater than 0 ° with respect to the central axis of the high-intensity lamp. Since it is tilted within a range of less than 90 °, it is possible to prevent the reflected light reflected by the auxiliary reflecting surface from returning to the high-intensity lamp. Thereby, since all the light emitted from a high-intensity lamp is reflected by a reflecting plate and irradiated from a lighting fixture, the fall of a light quantity can be prevented and glare can be reduced.

  Moreover, the lighting fixture of this invention has the structure where the said glare cut cap main body does not overlap with the light distribution curve of the said high-intensity lamp.

  With this configuration, the light emitted from the center of the high-intensity lamp is not irradiated on the glare cut cap body, so that the irradiation light is not absorbed by the glare cut cap body, and a reduction in the amount of light can be prevented. .

  Moreover, the lighting fixture of this invention has the structure whose inner diameter of the said glare cut cap main body is substantially the same as the outer diameter of the said high-intensity lamp.

  With this configuration, since the inner diameter of the glare cut cap main body is substantially the same as the outer diameter of the high-intensity lamp, the tip of the glare cut cap main body can be narrowed, and the design of the lighting fixture can be improved.

  Furthermore, the lighting fixture of the present invention has a configuration in which the outer peripheral end of the auxiliary reflector is on a line connecting the center of the high-intensity lamp and the tip of the reflector.

  With this configuration, the light emitted from the center of the high-intensity lamp is blocked by the auxiliary reflector of the glare cut cap to reduce glare, and a space through which the reflected light from the reflector passes can be secured.

  In the present invention, the auxiliary reflection surface of the auxiliary reflection plate provided around the opening of the glare cut cap reflects the light blocked by the reflection plate, and the light reflected by the reflection plate is irradiated. At this time, the shape of the auxiliary reflecting surface of the auxiliary reflecting plate is a parabolic shape focusing on the center of the high-intensity lamp, and the axis of the parabolic surface is greater than 0 ° with respect to the central axis of the high-intensity lamp. Since it is tilted within a range of less than 90 °, it is possible to prevent the reflected light reflected by the auxiliary reflecting surface from returning to the high-intensity lamp. Thereby, since all the light emitted from the high-intensity lamp is reflected by the reflector and irradiated from the lighting fixture, the lighting fixture having the effect of preventing the decrease in the amount of light and reducing the glare can be provided. Is something that can be done.

(A) is a side view which shows embodiment of the lighting fixture of this invention, (B) is sectional drawing of a BB position in (A). (A) is a plan view of the glare cut cap, (B) is a side view and a sectional view of the glare cut cap. Explanatory drawing which shows the relationship between the auxiliary reflective surface of a glare cut cap, and the central axis of a HID lamp Explanatory drawing which shows the path | route of the light emitted from the light emission part of the lamp | ramp Illustration of lamp light distribution curve Sectional drawing which shows the positional relationship of a lamp, a glare cut cap, and a reflecting plate An example of a graph showing the luminous intensity distribution below the luminaire when the axis of the auxiliary reflection surface of the glare cut cap and the center axis of the lamp are inclined at a predetermined angle (A) is sectional drawing of the conventional lighting fixture, (B) is an expanded sectional view of B position in (A).

Hereinafter, the lighting fixture of embodiment of this invention is demonstrated using drawing.
1A is a side view showing a lighting apparatus according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along the line BB in FIG. 1A, and FIG. 2A is a plan view of a glare cut cap. 2B is a side view and a cross-sectional view of the glare cut cap, FIG. 3 is an explanatory view showing the relationship between the auxiliary reflection surface of the glare cut cap and the central axis of the HID lamp, and FIG. 4 is emitted from the light emitting part of the lamp. FIG. 5 is an explanatory diagram showing a light distribution curve of the lamp, FIG. 6 is a cross-sectional view showing the positional relationship between the lamp, the glare cut cap, and the reflector, and FIG. 7 is an auxiliary of the glare cut cap. It is an example of the graph which shows the luminous intensity distribution in the downward direction of a lighting fixture when the axis | shaft of a reflective surface and the center axis | shaft of a lamp | ramp incline at a predetermined angle.

As shown in FIG. 1, the luminaire 10 of the present invention can be used, for example, as an illumination that is embedded in an opening provided in a ceiling and illuminates the lower part.
The lighting fixture 10 has a portal-type fixture body 20 and a lamp body 30 inside the fixture body 20. A socket 31 is attached to the lower surface of the center of the upper plate 21 of the instrument body 20 downward. The socket 31 has a high-intensity lamp 32 such as an HID lamp (High Intensity Discharge lamp) (hereinafter “lamp 32”). Are interchangeably attached. The socket 31 is connected to, for example, a ballast 33 provided separately from the instrument body 20 and supplies a constant power during operation of the lamp 32 to obtain a uniform lamp output.

  On the outer surface of the side plate 22 of the instrument main body 20, a mounting bracket 23 for attaching the instrument main body 20 to a ceiling or the like is provided. For example, an arm 231 is provided on the mounting bracket 23 so as to be opened outward by a spring 232. As a result, when the instrument body 20 is inserted from the ceiling opening, the arm 231 moves inward, and when reaching the upper side of the ceiling, the left and right arms 231 are expanded outward by the return force of the spring 232. The instrument body 20 can be attached to the ceiling.

  A mounting base 24 is provided on the upper plate 21 of the instrument body 20 so as to enclose the socket 31, and a reflecting plate 25 having a parabolic reflecting surface 251 is attached to the mounting base 24, for example. ing. The reflector 25 reflects light emitted from the lamp 32 to a predetermined irradiation range. A ring-shaped frame member 26 is attached to the distal end portion of the instrument body 20, and the distal end 252 of the reflection plate 25 is fixed to the frame 26. The frame member 26 is a decorative plate because it is exposed to the lower surface of the ceiling when the lighting fixture 10 is attached to the ceiling.

  As shown in FIG. 4, the lamp 32 has a triple tube structure, and the outer tube 321 provided on the outermost side has a hemispherical tip 322, and a socket mounting portion (illustrated) on the base end side. (Omitted). The lamp 32 has an arc tube 323 at the innermost side, and a light emitting portion 324 at the center of the lamp 32. A glare cut cap 34 is attached to the tip 322 to block light from the arc tube 323 and reduce glare.

  As shown in FIG. 2, the glare cut cap 34 has a substantially cylindrical glare cut cap main body 35 having an opening 351 on one end side and a bottom plate 352 on the other end side, and an opening 351 side end of the glare cut cap main body 35. And an auxiliary reflector 36 that protrudes outward from the portion. The glare cut cap body 35 has a smaller diameter on the bottom plate 352 side than the opening 351 side, and has a tapered shape.

  The inner diameter D2 in the opening 351 of the glare cut cap body 35 is larger than the outer diameter D1 (see FIG. 4) of the lamp 32 and is substantially the same size. Can be inserted at a predetermined interval. The glare cut cap 34 is supported by a cap support plate 27 (see FIG. 1) so that the opening 351 of the glare cut cap main body 35 is fitted on the tip of the lamp 32.

  As shown in FIG. 3, the auxiliary reflecting plate 36 has a parabolic auxiliary reflecting surface 361 that focuses on the light emitting portion 324 that is the center of the lamp 32 in a state where the glare cut cap 34 is attached to the lamp 32. . Further, the axis 362 of the parabolic auxiliary reflection surface 361 is inclined with respect to the central axis 325 of the lamp 32, and the inclination angle β is 0 ° <β <90 °. In other words, the auxiliary reflecting surface 361 is opened more than the paraboloid when the shaft 362 overlaps the central axis 325 of the lamp 32 and has a larger radius of curvature.

  Therefore, as shown in FIG. 4, the light BM <b> 1 emitted from the light emitting unit 324 that is the center of the lamp 32 is reflected by the auxiliary reflecting surface 361 of the auxiliary reflecting plate 36, and β is more than the central axis 325 of the lamp 32. , That is, toward the reflection surface 251 of the reflection plate 25 (reflected light BM2). Then, the reflected light BM3 reflected by the reflecting surface 251 is irradiated to the outside from the space between the auxiliary reflecting plate 36 and the reflecting plate 25.

Further, as shown in FIG. 5, the glare cut cap main body 35 is disposed so as not to overlap a light distribution curve HL indicating the relationship between the direction emitted from the light emitting unit 324 of the lamp 32 and the amount of light.
Accordingly, the light emitted from the light emitting portion 324 of the lamp 32 to the glare cut cap 34 hardly irradiates the glare cut cap body 35 and is applied to the auxiliary reflection surface 361 of the auxiliary reflection plate 36. Note that the light reflected by the auxiliary reflecting surface 361 is irradiated to the outside via the reflecting plate 25 as described in FIG.

Further, as shown in FIG. 6, the outer peripheral edge 363 of the auxiliary reflector 36 is arranged so as to be positioned on a line L connecting the light emitting part 324 that is the center of the lamp 32 and the tip 252 of the reflector 25. Yes.
Therefore, the light from the light emitting unit 324 is not directly irradiated to the outside of the lighting fixture 10, but is reflected by the reflecting plate 25 or the auxiliary reflecting plate 36 and the reflecting plate 25 and is irradiated from the lighting fixture 20. For this reason, the person who is under the lighting fixture 10 does not visually recognize the light emission part 324 directly.

  FIG. 7 shows the luminous intensity immediately below the lighting fixture 10 when the inclination angle between the axis 362 of the auxiliary reflecting surface 361 and the central axis 325 of the lamp 32 is β = 85 °. The horizontal axis indicates the distance (mm) from directly below the center of the lamp 32, and the vertical axis indicates the luminous intensity (cd). Further, in the drawing, the solid line shows the case of the lighting fixture 10 using the glare cut cap 34 according to the present invention, and the broken line shows the case of the lighting fixture using the conventional glare cut cap (that is, β = 0 °). . As shown in FIG. 7, it can be seen that the luminous intensity near the center of the luminaire 10 has decreased and the glare has been reduced. Further, it can be seen that the luminous intensity increases at a position away from just below the center, and the overall brightness (that is, the area surrounded by the curve of the graph) increases.

As described above, according to the lighting fixture 10 according to the embodiment of the present invention described above, the glare cut cap 34 attached to the lamp 32 blocks the direct light emitted from the light emitting unit 324 at the center of the lamp 32 and reduces glare. To do. At this time, the auxiliary reflection surface 361 of the auxiliary reflection plate 36 provided around the opening 351 of the glare cut cap body 35 reflects the light blocked by the reflection plate 25, and the light reflected by the reflection plate 25 is illuminated. Irradiated from the instrument 10. At this time, the shape of the auxiliary reflecting surface 361 of the auxiliary reflecting plate 36 is a parabolic shape focusing on the center of the lamp 32, and the parabolic surface 362 is set to 0 with respect to the central axis 325 of the lamp 32. Since it is tilted in the range of more than 90 ° and less than 90 °, the reflected light reflected by the auxiliary reflecting surface 361 can be prevented from returning to the lamp 32.
Thereby, since all the light emitted from the lamp | ramp 32 is reflected by the reflecting plate 25 and irradiated from the lighting fixture 10, the fall of a light quantity can be prevented and glare can be reduced. Further, since the light returning to the lamp 32 is reduced, the temperature rise of the lamp 32 can be reduced.

  Further, since the light emitted from the light emitting portion 324 at the center of the lamp 32 is not irradiated to the glare cut cap body 35, the irradiation light is not absorbed by the glare cut cap body 35, and the light quantity is prevented from being reduced. be able to.

  Further, since the inner diameter D2 of the glare cut cap main body 35 is substantially the same as the outer diameter D1 of the lamp 32, the tip of the glare cut cap main body 35 can be made thin, and the design of the lighting fixture 10 can be improved.

  Further, since the outer peripheral end 363 of the auxiliary reflector 36 of the glare cut cap 34 is disposed on the line L connecting the light emitting part 324 at the center of the lamp 32 and the tip 252 of the reflector 25, the light emitting part 324 of the lamp 32 The auxiliary reflector 36 of the glare cut cap 34 blocks the emitted light to reduce glare, and a space through which the reflected light from the reflector passes can be ensured.

  In addition, the lighting fixture of this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 25 Reflector 252 Tip 32 High-intensity lamp 324 Light emission part (center)
325 Central axis 34 Glare cut cap 35 Glare cut cap body 351 Aperture 36 Auxiliary reflector 361 Auxiliary reflection surface 362 Axis 363 Outer end D1 Lamp outer diameter D2 Glare cut cap body inner diameter HL Light distribution curve L Connecting line

Claims (4)

A high-intensity lamp,
A reflector that reflects the light emitted by the high-intensity lamp to a predetermined irradiation range;
A glare cut cap main body having an opening at one end, and a glare cut cap having an auxiliary reflector that is provided to project outward from the opening side end of the glare cut cap main body,
A lighting fixture in which the opening of the glare cut cap body is attached to the tip of the high-intensity lamp at a predetermined interval,
The auxiliary reflecting plate has a parabolic auxiliary reflecting surface whose focal point is the center of the high-intensity lamp, and the axis of the auxiliary reflecting surface is greater than 0 ° with respect to the central axis of the high-intensity lamp. A luminaire tilted within a range of less than 90 °.   The luminaire according to claim 1, wherein the glare cut cap body does not overlap a light distribution curve of the high-intensity lamp.   The lighting apparatus according to claim 1 or 2, wherein an inner diameter of the glare cut cap body is substantially the same as an outer diameter of the high-intensity lamp.   The lighting fixture according to any one of claims 1 to 3, wherein an outer peripheral end of the auxiliary reflector is on a line connecting a center of the high-intensity lamp and a tip of the reflector.

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