TW201411049A - Lighting fixture - Google Patents

Abstract

A lighting apparatus includes a light source, a first reflector, and a second reflector. The first reflector has a first input aperture, a first output aperture, and a first reflecting plane between the first input aperture and the first output aperture. The second reflector has a second input aperture, a second output aperture, and a second reflecting plane between the second input aperture and the second output aperture. The output region of direct light from the light source through the first output aperture, said output region being projected on the aperture plane of the second input aperture, is smaller than the aperture plane of the second input aperture. The virtual output region of the direct light, said virtual output region being projected on the plane including the aperture plane of the second output aperture, is larger than the aperture plane of the second output aperture.

Description

Lighting fixture

The present invention relates to a lighting fixture.

Japanese Laid-Open Patent Publication No. 2010-205660 discloses a lighting fixture. The lighting fixture includes: a first reflector having a reflecting surface that reflects light of the semiconductor light emitting element and emitted from the exit opening; and the second reflector is disposed from the first light from the semiconductor light emitting element The direct light exit area from which the exit opening is emitted is further outside. In the lighting fixture described above, by providing the second reflector, it is possible to have a light distribution different from the structure having only the first reflector.

In the above conventional example, the range of the solid angle of the exit opening of the second reflector viewed from the semiconductor light-emitting element is larger than the range of the solid angle of the exit opening of the first reflector so that the first reflection is not performed. The light (direct light) of the semiconductor light-emitting element that is emitted from the exit opening of the first reflector by the reflection of the body does not enter the reflection surface of the second reflector at all.

As described above, the range of the solid angle of the exit opening of the second reflector viewed from the semiconductor light-emitting element is larger than the range of the solid angle of the exit opening of the first reflector, and the first reflector is considered to be emitted. The range of the solid angle of the opening is reduced, and the range of the solid angle of the exit opening of the second reflector is increased.

The range of the solid angle of the exit opening of the first reflector observed from the semiconductor light-emitting element When the emission range of the direct light is narrowed and narrowed, if the area of the exit opening of the first reflector is constant, the dimension of the first reflector in the axial direction must be increased so that the opening of the first reflector is opened. The distance from the semiconductor light emitting element increases.

Further, when the range of the solid angle of the exit opening of the second reflector viewed from the semiconductor light-emitting element is increased, if the dimension of the second reflector in the axial direction is constant, the second reflector must be emitted. The area of the opening is increased.

In any of the above cases, the size of the lighting fixture is increased.

In view of the above, it is an object of the present invention to provide a lighting fixture that can be miniaturized.

The lighting fixture of the present invention includes a light source (10), a first reflector (3), and a second reflector (5). The first reflector (3) includes a first incident opening (311) disposed on the light source (10) side, a first exit opening (312), and the first incident opening (311) and the first exit opening. The first reflecting surface (313) between (312). The second reflector (5) includes a second incident opening (51) disposed on the first emission opening (312) side, a second emission opening (52), and the second incident opening (51) and the second The second reflecting surface (53) between the openings (52) is exited. The light source (10) projected from the first exit opening (510) of the second entrance opening (51) has an exit region (R1) of direct light (A1), which is smaller than the second incident opening The opening surface (510) of (51) is smaller; the virtual emission area (R2) of the direct light projected onto the plane (P) of the opening surface (520) of the second exit opening (52) is smaller than the second The opening face (520) of the exit opening (52) is larger.

In one embodiment, the first reflector (3) has a shallower shape than the second reflector (5), and the second reflector (5) has a deeper depth than the first reflector (3). The shape of the bowl.

In one embodiment, the first reflector (3) is a shallower reflector than the second reflector (5), and the second reflector (5) is deeper than the first reflector (3). Wing reflector.

According to the present invention, the distance from the first exit opening light source can be reduced as compared with the case where the light emitted from the first exit opening without being reflected by the first reflector is not incident on the second reflector. The small or second exit opening is reduced to miniaturize.

3‧‧‧1st reflector

5‧‧‧2nd reflector

6‧‧‧Power supply unit

7‧‧‧Axis of symmetry

10‧‧‧Light source

11‧‧‧Substrate

21‧‧‧ Appliance body

22‧‧‧ frame

23‧‧‧Installing spring

31‧‧‧ Body Department

34‧‧‧ Cover Storage Department

41‧‧‧Light penetrating cover

42‧‧‧ cushion

43‧‧‧Installation box

51‧‧‧2nd entrance opening

52‧‧‧2nd exit opening

53‧‧‧2nd reflecting surface

61‧‧‧ Cable

101‧‧‧1st end

221‧‧‧ Body Department

222‧‧‧Flange

311‧‧‧1st entrance opening

312‧‧‧1st exit opening

312 ₂ ‧‧‧2nd end

313‧‧‧1st reflecting surface

510‧‧‧Open face

512‧‧‧2nd end

520‧‧‧Open face

522‧‧‧2nd end

The best mode for carrying out the invention will be described in further detail. Other features and advantages of the present invention will be more fully understood from the following detailed description and drawings.

Fig. 1 Fig. 1A is an explanatory view showing a schematic configuration of an embodiment of the present invention, and Fig. 1B is an enlarged view of a portion X of Fig. 1A.

Figure 2 shows a front view of the disconnected part of the same.

Figure 3 shows the perspective view of the same as above.

Fig. 4 is an explanatory view showing a comparative example of the above.

[Best Mode for Carrying Out the Invention]

As shown in FIG. 1, the lighting fixture of this embodiment includes a light source (10), a first reflector 3, and a second reflector 5. The first reflector 3 has a first incident opening 311 disposed on the light source (10) side, a first outgoing opening 312, and a first reflecting surface 313 between the first incident opening 311 and the first outgoing opening 312. The first reflector 3 is disposed such that the light of the light source passes through the first reflector 3 from the first incident opening (311) side toward the first exit opening (312). The light source includes at least one light emitting diode 10. The second reflector 5 has a second incident opening 51 disposed on the first emission opening 312 side, a second emission opening 52, and a second reflecting surface 53 between the second incident opening 51 and the second exit opening 52. The second reflector 5 is disposed such that the light from the first emission opening 312 passes through the second reflector 5 from the second incident opening (51) side toward the second exit opening (52). In the example of FIGS. 2 and 3, the lighting fixture includes a substrate 11 in the first direction D1. (the vertical direction in FIG. 2) has a predetermined thickness; the light-emitting diode 10 serves as a light source mounted on the substrate 11, and the fixture body 21 fixes the substrate 11. The heat dissipation of the light-emitting diode 10 is mainly performed by the fixture body 21, so that a material having a high thermal conductivity (for example, aluminum) should be used as much as possible as the material of the fixture body 21. As shown in FIG. 3, the light-emitting diode 10 is electrically connected to a power supply device 6 configured to generate electric power for lighting the light-emitting diode 10 via a cable 61. The power supply device 6 includes an AC-DC converter configured to convert, for example, AC power input from the outside into an appropriate DC power. Therefore, the power supply device 6 can be realized by using a conventional switching power supply, and detailed description thereof will be omitted.

The light-emitting diode 10 is disposed on a portion (upper portion) of the fixture body 21 on the first side (upper side) of the first direction D1. Further, a portion (lower portion) of the luminaire main body 21 on the second side (lower side) of the first direction D1 is attached with a first reflector 3 for reflecting the light of the illuminating diode 10 to the lower side. In the present embodiment, the first reflector 3 has a shallower shape than the second reflector 5 to be described later. The first reflector 3 has a shaft parallel to the first direction D1, and is integrally formed by the main body portion 31 and the lid accommodating portion 34. The inner peripheral surface of the main body portion 31 functions as a first reflecting surface 313 for reflecting the light of the light-emitting diode 10. For example, the first reflecting surface 313 has a shape that is axisymmetric with respect to an axis parallel to the first direction D1 (for example, a paraboloid shape of rotation). In other words, the cross-sectional shape of the first reflecting surface 313 perpendicular to the first direction D1 is circular. Further, the main body portion 31 gradually increases the inner diameter from the first incident opening 311 on the upper side of the light incident from the light-emitting diode 10 to the first outgoing opening 312 on the lower side of the light emission. Alternatively, the first reflector 3 may surround the light-emitting diode 10 instead of arranging the first reflector 3 on the lower side of the light-emitting diode 10 as described above, so that the light of the light-emitting diode 10 is from the first The incident opening 311 is incident.

Further, the lighting fixture includes a light transmissive material (for example, glass), and the light-transmitting cover portion 41 that covers the first emission opening 312 is observed from the second side (lower side) of the first direction D1. The lid accommodating portion 34 of the first reflector 3 protrudes outward in the radial direction from the lower end of the main body portion 31 to accommodate the light-transmitting cover portion 41. Further, in the light-transmitting cover portion 41, for example, a ring-shaped spacer 42 which is formed of an elastic material such as synthetic rubber and which closes a gap between the outer peripheral end portion of the light-transmitting cover portion 41 and the lid accommodating portion 34 is attached. The light-transmitting cover portion 41 and the spacer 42 are fixed to the first reflector 3 by, for example, an annular mounting frame 43. For example, the mounting frame 43 is screwed to the cover. The accommodating portion 34 encloses the light-transmitting cover portion 41 and the spacer 42 between the mounting frame 43 and the lid accommodating portion 34.

In the present embodiment, the second reflecting surface 53 of the second reflector 5 has a bowl-like shape deeper than the first reflector 3 to reflect the light from the first exit opening 312. The lighting fixture further includes a casing 22 coupled to the fixture main body 21, and holds the second reflector 5 so as to cover the outer peripheral surface of the second reflector 5. The second reflector 5 is made of, for example, a metal plate, and is fixed to the frame 22 by caulking, for example. Further, the combination of the frame 22 and the fixture body 21 is achieved by, for example, screwing.

Here, the casing 22 has a cylindrical main body portion 221 that is open on each side in the first direction D1, and a flange portion 222 that protrudes outward in the radial direction from the lower end of the main body portion 221. Further, a plurality of (three in the drawing) mounting springs 23 are attached to the outer peripheral surface of the main body portion 221 of the casing 22. Each of the attachment springs 23 is formed of an elastically deformable leaf spring having a first end portion and a second end portion, and the first end portion is such that the second end portion side faces the frame body 22 in the first direction D1 (up and down direction) The displacement is fixed to the frame 22.

The lighting fixture of the present embodiment is fitted and placed in an insertion hole (not shown) provided in the ceiling material, and each of the attachment springs 23 is supported by the ceiling material by elastic contact with the ceiling material from above. In the state of the fitting arrangement, the gap between the outer circumferential surface of the main body portion 221 of the frame 22 and the inner circumferential surface of the insertion hole is covered by the flange portion 222.

The second reflecting surface 53 of the second reflector 5 has a common axis with the first reflecting surface 313 of the first reflector 3, and the common axis has an axisymmetric shape (for example, a paraboloid of revolution). In other words, the cross-sectional shape of the second reflecting surface 53 perpendicular to the first direction D1 is circular. In the second reflector 5, the light from the first exit opening 312 is incident on the upper second input opening 51 and the second exit opening 52 on the lower side of the light emission, and the inner diameter is gradually increased.

Hereinafter, the features of the present invention will be described.

As shown in FIGS. 1A and 1B, the first surface of the opening face 510 of the second incident opening 51 is projected from the first The light source (10) of the exit opening 312 is set to be smaller than the opening surface 510 of the second incident opening 51 by the exit region R1 of the direct light A1. Further, the virtual emission region R2 of the direct light projected on the plane P including the opening surface 520 of the second emission opening 52 is set to be larger than the opening surface 520 of the second emission opening 52. In the present embodiment, the range of the solid angle of the first emission opening 312 as viewed from any position of the light-emitting diode 10 is within the range of the solid angle of the second incident opening 51, and the second incident opening 51 is made to some extent. The first exit opening 312 is sufficiently enlarged. Thereby, the light emitted from the first emission opening 312 is leaked to the outside of the second incident opening 51, and all of the light is incident on the second incident opening 51. In other words, it is possible to prevent light emitted from the first emission opening 312 from entering the gap between the light-transmitting cover portion 41 and the second reflector 5.

The second emission opening 52 is sufficiently reduced so that a part of the direct light emitted from the first emission opening 312 without being reflected by the first reflector 3 is incident on the second reflection surface 53 of the second reflector 5 . In other words, part of the direct light of the light-emitting diode 10 is emitted from the second exit opening 52 via the reflection of the second reflecting surface 53 of the second reflector 5 .

Here, as shown in FIG. 1, the light-emitting diode 10, the first emission opening 312, the second incident opening 51, and the second exit opening 52 of the light source according to the present embodiment each have a common axis (symmetry axis) ) 7 is an axisymmetric circle. Therefore, the direct light of the direct light of the light-emitting diode 10 from the first exit opening 312 and the angle formed by the symmetry axis 7 are the largest, and the direct light emitted from the end of the self-luminous diode 10 passes through the symmetry axis 7 and When the first exit opening 312 ends. That is, in order to satisfy the above conditions, as shown by an arrow A1 in FIG. 1, the direct light which is emitted from the end of the self-luminous diode 10 and passes through the ends of the symmetry axis 7 and the first exit opening 312 is incident on the second reflector 5 The second reflecting surface 53 may be used. In other words, in the plane of FIG. 1 including the symmetry axis 7, the first end of the light-emitting diode 10 on the first side in the second direction D2 perpendicular to the first direction D1 is connected (for example, 1 left) 101 and the second direction D2 of the first exit opening of the second end 312 (e.g., a right end in FIG. 1) the straight line ₃₁₂₂ of (right A1) which is the second side of which constitutes the axis of symmetry 7 The angle θ1 is smaller than the line A2 connecting the first end 101 of the light-emitting diode 10 and the second end 512 of the second incident opening 51 on the second side in the second direction, which is smaller than the angle θ2 formed by the symmetry axis 7. And the line A3 connecting the first end 101 of the light-emitting diode 10 and the second end 522 of the second output opening 52 on the second side in the second direction is larger than the angle θ3 formed by the symmetry axis 7. .

According to the above configuration, as compared with the case where the direct light of the light-emitting diode 10 is not incident on the second reflection surface 53 of the second reflector 5 as shown in FIG. 4, the first emission opening 312 and the light emission can be generated. The distance D of the diode 10 is reduced or the diameter R of the second exit opening 52 is reduced to miniaturize it.

In one embodiment, the light source includes a plurality of light emitting diodes 10 disposed in a third direction perpendicular to the second direction D2 (and the first direction D1). As shown in FIG. 1A, the first reflector 3 has a cross section (cross section) similar to that of the first reflector 3 of the above-described embodiment, but is reflected shallower in the third direction than the second reflector 5. body. In the same manner, the second reflector 5 is a wing reflector having a cross section (cross section) similar to that of the second reflector 5 of the above-described embodiment, but extending deeper than the first reflector 3 in the third direction. In detail, the first reflector 3 is composed of four side walls, and has a first incident opening 311 extending in the third direction on the first side in the first direction D1, and the second side in the first direction D1. The first exit opening 312 has a rectangular shape extending in the third direction. The two side walls extending in the third direction of the four side walls of the first reflector 3 correspond to the two first reflecting surfaces 313 and 313. The second reflector 5 is composed of four side walls, and has a rectangular second incident opening 51 extending in the third direction on the first side in the first direction D1, and has a third direction on the second side in the first direction D1. A second exit opening 52 of the extended rectangle. The two side walls extending in the third direction of the four side walls of the second reflector 5 correspond to the two second reflecting surfaces 53 and 53.

3‧‧‧1st reflector

5‧‧‧2nd reflector

7‧‧‧Axis of symmetry

10‧‧‧Light source

11‧‧‧Substrate

21‧‧‧ Appliance body

22‧‧‧ frame

31‧‧‧ Body Department

34‧‧‧ Cover Storage Department

41‧‧‧Light penetrating cover

42‧‧‧ cushion

43‧‧‧Installation box

51‧‧‧2nd entrance opening

52‧‧‧2nd exit opening

53‧‧‧2nd reflecting surface

101‧‧‧1st end

221‧‧‧ Body Department

222‧‧‧Flange

311‧‧‧1st entrance opening

312‧‧‧1st exit opening

312 ₂ ‧‧‧2nd end

313‧‧‧1st reflecting surface

510‧‧‧Open face

512‧‧‧2nd end

520‧‧‧Open face

522‧‧‧2nd end

Claims (3)

A lighting fixture comprising: a light source; the first reflector having a first incident opening disposed on the light source side, a first exit opening, and a first reflecting surface between the first incident opening and the first exit opening; And the second reflector has a second incident opening disposed on the first emission opening side, a second emission opening, and a second reflecting surface between the second incident opening and the second exit opening; and the feature is: An exit region of the direct light projected from the light source of the first exit opening projected on the opening surface of the second incident opening is smaller than an opening surface of the second incident opening; and projected onto the opening surface including the second exit opening The imaginary emission area of the direct light is larger than the opening surface of the second exit opening. The lighting fixture of claim 1, wherein the first reflector has a shallower shape than the second reflector, and the second reflector has a bowl shape deeper than the first reflector. shape. The lighting fixture of claim 1, wherein the first reflector is a shallower reflector than the second reflector, and the second reflector is a wing reflector that is deeper than the first reflector.