JP5853208B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture in which a solid light emitting element such as an LED (Light Emitting Diode) and an optical member are combined.

  2. Description of the Related Art Conventionally, there has been known a lighting fixture in which an LED and an optical member such as a lens are combined to change the light distribution angle of light to be irradiated (for example, see Patent Document 1). As shown in FIG. 16, such a lighting fixture includes a light emitting unit 20 having a plurality of LEDs 10, a light distribution control unit 40 having a plurality of lenses 30 provided to face each LED 10, and the light emitting unit 20. And an adjustment unit 50 that adjusts the distance D between the light distribution control unit 40 and the light distribution control unit 40. The adjusting unit 50 includes a plate 51 provided on the light emitting surface side of the light emitting unit 20 and movable in a direction perpendicular to the optical axis, and a lever 52 used to move the plate 51. The adjusting unit 50 further engages with the protrusion 53 provided on the surface of the plate 51 facing the light distribution control unit 40 and the protrusion 53 provided on the surface of the light distribution control unit 40 facing the plate 51. And a protrusion 54. When the plate 51 is moved by operating the lever 52, the engagement state of the projections 53 and 54 changes and the distance D changes, so that the refraction pattern in the lens 30 of the light emitted from the LED 10 changes, and from the lighting fixture. The light distribution angle of the irradiated light changes.

JP 2004-355934 A

  However, in the luminaire as described above, the light distribution adjustment is performed by visual confirmation of the irradiation light, so that the operation is skillful and it is difficult for a general user to adjust the light distribution. In addition, there are problems that it is difficult to obtain reproducibility of light distribution adjustment, it is difficult to obtain the same light distribution among a plurality of lighting fixtures, and it takes time to adjust light distribution. Furthermore, since there are many dedicated members required for light distribution adjustment, there are also problems such as an increase in manufacturing cost, a decrease in device assembly efficiency, and a loss in the design of the device.

  SUMMARY OF THE INVENTION The present invention solves the above-described problem, and is a lighting fixture that can adjust the distance between the light emitting unit and the light distribution control unit to make the light distribution angle of irradiation light variable, and can be easily used by general users. It aims at providing the lighting fixture which can adjust light distribution. In addition, the present invention can adjust the light distribution with high reproducibility and quickly, can obtain the same light distribution among a plurality of lighting fixtures, has a low manufacturing cost, has high fixture assembly efficiency, and has a design property. An object is to provide a good lighting fixture.

The lighting fixture of the present invention holds a light emitting unit having a plurality of light sources, a light distribution control unit having a plurality of optical members provided to face each of the plurality of light sources, and the light distribution control unit, An adjustment unit that adjusts an interval between the light emitting unit and the light distribution control unit by moving the light distribution control unit in the optical axis direction of the light source; and the light emitting unit is accommodated, and the adjustment unit is moved in the optical axis direction. A housing that is movably housed, and the adjustment portion has a scale provided along the optical axis direction at a position overlapping the housing within a range of movement relative to the housing, and the scale Is a slit, and is exposed to the outside of the housing when the interval is increased.

  As for the scale, it is preferable that the range that can be visually confirmed increases as the interval increases.

The scale preferably has a concave shape.

  According to the present invention, since the scale indicating the interval between the light emitting unit and the light distribution control unit is provided in the adjustment unit, even a general user can easily adjust the light distribution by adjusting the interval while viewing the scale. can do. In addition, by setting the adjustment unit according to a specific scale position, it is possible to obtain a predetermined light distribution with high reproducibility and quickly, and to obtain the same light distribution among a plurality of lighting fixtures. Furthermore, since there are few exclusive members required for light distribution adjustment, the manufacturing cost is reduced, the assembly efficiency of the fixture is improved, and the design of the lighting fixture can be improved.

The disassembled perspective view of the lighting fixture which concerns on embodiment of this invention. The figure which looked at the said lighting fixture from the light-projection surface side. The II sectional view taken on the line of FIG. (A) is the figure which looked at the lens which comprises the said lighting fixture from diagonally downward, (b) is sectional drawing of the lens. The figure which shows the optical path of the light radiate | emitted from the light source in the state of FIG. Sectional drawing of the lighting fixture in the state which the said light source and the lens left | separated. The figure which shows the optical path of the light radiate | emitted from the said light source in the state of FIG. (A) and (b) are figures which show the scale which constitutes the lighting fixture concerning the 1st modification of the above-mentioned embodiment. (A) and (b) are figures which show the scale which constitutes the lighting fixture concerning the 2nd modification of the above-mentioned embodiment. (A) thru | or (c) is a figure which shows the scale which comprises the lighting fixture which concerns on the 3rd modification of the said embodiment. The figure which shows the scale which comprises the lighting fixture which concerns on the 4th modification of the said embodiment. (A) is a figure which shows the scale which comprises the lighting fixture which concerns on the 5th modification of the said embodiment, (b) is sectional drawing of (a). The figure which shows the scale which comprises the lighting fixture which concerns on the 6th modification of the said embodiment. (A) (b) is a figure which shows the scale which comprises the lighting fixture which concerns on the 7th modification of the said embodiment. Sectional drawing of the lighting fixture which concerns on the 8th modification of the said embodiment, and the one part expanded perspective view. The side view of the conventional lighting fixture.

  The lighting fixture which concerns on embodiment of this invention is demonstrated with reference to FIG. 1 thru | or FIG. This luminaire uses an LED as a light source.

  As shown in FIG. 1 to FIG. 3, the lighting fixture 1 includes a light emitting unit 2 having a plurality of LEDs 21 and a light distribution control unit 3 having a plurality of lenses 31 provided to face the respective LEDs 21. Prepare. The luminaire 1 further holds the light distribution control unit 3 and moves the light distribution control unit 3 in the axial direction of the luminaire 1 so that the distance D between the light emitting unit 2 and the light distribution control unit 3 (see FIG. 3). ) And a housing 5 that houses the light emitting unit 2 and the adjustment unit 4. The adjustment unit 4 has a plurality of projections 41 projecting in a direction orthogonal to the axis on the outer periphery, and the housing 5 is provided with a plurality of slits 51 provided in parallel to the axis at positions corresponding to the projections 41 on the side surfaces. Have The adjustment unit 4 is held by the housing 5 in a state where each projection 41 is engaged with each slit 51. As a result, the adjustment unit 4 can move only in the axial direction and does not rotate in the housing 5. The adjustment unit 4 further includes a scale 42 provided along the axial direction at a position overlapping the housing 5 within a range of movement with respect to the housing 5. The scale 42 serves as an index of the interval D by indicating the degree of overlap between the adjustment unit 4 and the housing 5. Moreover, the lighting fixture 1 has the heat radiating part 6 which is fixed to the housing 5 and radiates heat generated in the light emitting part 2 as the LED 21 emits light.

  The light emitting unit 2 includes an LED 21 and a disk-shaped wiring board 22 on which the LED 21 is mounted. The LED 21 is composed of a blue LED that emits blue light and a yellow phosphor that is excited by the blue light and emits yellow light, and a white LED that emits pseudo white light by mixing the blue light and the yellow light. It is said. The optical axis of each LED 21 is parallel to the axis (see FIG. 3). The wiring board 22 is configured using a material having high thermal conductivity, for example, a metal such as aluminum, a resin such as glass epoxy, or an inorganic material such as ceramic as a base material. Moreover, the wiring board 22 has a light reflecting member having a high light reflectance on the LED 21 mounting surface. The light reflecting member is made of, for example, silver or aluminum. In addition, the wiring board 22 has a wiring pattern for supplying power to the LEDs 21. This wiring pattern is connected to a dimming device including a switch, a microcomputer, and the like via a distribution line, and the LED 21 is turned on / off and dimmed by adjusting power supply from the commercial power source to the LED 21. . The number of LEDs 21 mounted on the wiring board 22 and the arrangement of the LEDs 21 on the wiring board 22 are not limited to those shown in the drawing.

  The light distribution control unit 3 has a disk shape and is made of a translucent material such as an acrylic resin, a polycarbonate resin, a silicone resin, or glass. The light distribution control unit 3 includes a plurality of lenses 31 and a flat portion positioned between the lenses 31. The optical axis of each lens 31 coincides with the optical axis of the LED 21 facing each other.

  The adjustment unit 4 has a cylindrical shape and is made of, for example, a metal such as aluminum or copper, or a resin such as polyethylene terephthalate (PET). The scale 42 of the adjustment unit 4 is composed of a plurality of scale lines painted on a part of the outer periphery of the adjustment unit 4, and the scale line 42 a closest to the light incident surface is aligned with the end of the housing 5 on the light emission surface side. (See FIG. 6), the LED 21 is arranged at the focal position of the lens 31. The scale 42 may be provided by sticking a sticker on which the scale is printed, or may be provided by forming irregularities on the outer periphery of the adjustment unit 4 as will be described later. Further, the shape, number and arrangement of the protrusions 41 of the adjustment unit 4 are not limited to those of the present embodiment.

  The housing 5 has a bottomed cylindrical shape and is made of a material having high thermal conductivity, for example, a metal such as aluminum or copper. The light emitting unit 2 is attached to the bottom surface of the housing 5. The slit 51 of the housing 5 has a structure for fixing the protrusion 41 of the adjustment unit 4 at a specific position of the slit 51, for example, a click structure. The shape, number, and arrangement of the slits 51 are not limited to those shown in the drawings, and may be provided corresponding to the protrusions 41.

  The heat radiating portion 6 is made of aluminum or copper having high thermal conductivity and has a plurality of heat radiating fins 61. The heat dissipating part 6 is fixed to the housing 5 by an adhesive having high thermal conductivity, for example, a heat dissipating silicone adhesive.

  As shown in FIGS. 4A and 4B, the lens 31 constituting the light distribution control unit 3 has an inverted truncated cone shape in which the surface on which the light from the LED 21 is incident has a small diameter. It has a recess 31a. The concave portion 31a forms a space for accommodating the LED 21 when the lens 31 and the LED 21 come close to each other. The recess 31a includes a first light incident surface 31b that faces the LED 21 and a second light incident surface 31c that constitutes a side surface of the recess 31a. The lens 31 includes a light reflecting surface 31d that totally reflects light incident from the second light incident surface 31c, and a light emitting surface 31e that emits light.

  The operation of the lighting fixture 1 of the present embodiment configured as described above will be described with reference to FIGS. 5 to 7 in addition to FIG. 3 described above. FIG. 3 shows a state in which the graduation line 42 b closest to the light emitting surface and the end of the housing 5 are aligned, and the distance D between the light emitting unit 2 and the light distribution control unit 3 is reduced. At this time, since each LED 21 is housed in the recess 31a of the lens 31, most of the light emitted from the LED 21 (the optical path is indicated by a broken-line arrow) enters the lens 31 as shown in FIG. The light incident on the first light incident surface 31b is refracted there, and further refracted and emitted at the light emitting surface 31e. The light incident on the second light incident surface 31c is refracted there, then totally reflected by the light reflecting surface 31d, and further refracted and emitted by the light emitting surface 31e. In this case, the light emitted from the lens 31 is light having a large light distribution angle.

  In order to increase the distance D from the above state, for example, the protrusion 41 is moved along the slit 51 until the scale line 42a and the end of the housing 5 are aligned, and the adjustment unit 4 is moved to the light emitting surface side. At this time, since the adjusting unit 4 does not rotate, each lens 31 is separated from the LED 21 while facing the LED 21 and does not contact the LED 21. As a result, as shown in FIG. 6, the distance D becomes large. In the operation of increasing the distance D, the scale 42 is gradually exposed to the outside of the housing 5, and the range that can be visually confirmed increases as the distance D increases. In this state, since the LED 21 is disposed at the focal position of the lens 31, the light emitted from the LED 21 is emitted from the lens 31 as light having a small light distribution angle, as shown in FIG.

  As described above, according to the lighting device 1 of the present embodiment, the scale 42 indicating the distance D is provided in the adjustment unit 4, so even a general user adjusts the distance D while viewing the scale 42. Light distribution can be adjusted easily. Thereby, compared with the case where light distribution adjustment is performed while visually confirming irradiation light, desired light distribution can be obtained with high reproducibility and speed. Moreover, even if it is a case where the some lighting fixture 1 is used, the same light distribution can be obtained by setting the adjustment part 4 of each lighting fixture 1 according to the same scale line. Moreover, since there are few exclusive members required for light distribution adjustment compared with the conventional lighting fixture, a manufacturing cost reduces and fixture assembly efficiency improves. Further, since the size of the distance D corresponds to the number of scale lines visible to the user, it is easy to intuitively imagine the adjustment direction necessary to obtain a desired light distribution, and the operability is high. Therefore, it is not always necessary to provide the scale 42 with characters or numbers indicating the light distribution adjustment direction. Therefore, the scale 42 can be provided relatively easily in production, and the design of the lighting apparatus 1 can be improved.

  Next, the lighting fixture which concerns on the 1st modification of this embodiment is demonstrated with reference to Fig.8 (a) (b). As shown in FIG. 8A, the adjustment unit 4 of the present lighting fixture has a scale 42 provided over the entire outer periphery thereof. Thereby, since the scale 42 can be visually recognized no matter what direction the lighting apparatus is viewed, the operability is improved. On the other hand, the adjustment unit 4 shown in FIG. 8B has dot-shaped scales 42 on the outer periphery thereof. Thereby, since the scale 42 becomes inconspicuous, the design property of a lighting fixture can be improved.

  Next, the lighting fixture which concerns on the 2nd modification of this embodiment is demonstrated with reference to Fig.9 (a) (b). As shown in FIG. 9A, the adjustment unit 4 of the present lighting fixture has a scale 42 to which numerals indicating the spread angle of light distribution are added. In the illustrated example, “10” is written below the scale line 42a, and “30” is written below the scale line 42b. When the scale line 42a and the end of the housing 5 are aligned, a light distribution with a spread angle of 10 degrees is obtained, and when the scale line 42b and the end of the housing 5 are aligned, a distribution with a spread angle of 30 degrees is obtained. It means that light can be obtained. On the other hand, the adjustment unit 4 shown in FIG. 9B has a scale 42 marked “narrow” below the scale line 42a and marked “wide” below the scale line 42b. This is because light with a narrow light distribution is obtained when the scale line 42a and the end of the housing 5 are aligned, and light with a wide light distribution is obtained when the scale line 42b and the end of the housing 5 are aligned. Means that. According to this modification, it becomes easy to understand which direction the adjustment unit 4 should be moved in the light distribution adjustment, so that the operability is improved.

  Next, the lighting fixture which concerns on the 3rd modification of this embodiment is demonstrated with reference to Fig.10 (a) thru | or (c). Each of the adjustment units 4 of this modification has a scale 42 having an uneven shape. The adjustment unit 4 shown in FIG. 10A has a concave scale 42 formed by carving the side surface of the adjustment unit 4. The adjustment unit 4 shown in FIG. 10B has a convex scale 42 protruding outward from the side surface of the adjustment unit 4. The adjustment unit 4 shown in FIG. 10C has a convex shape that protrudes outward from the side surface of the adjustment unit 4, and further has a scale 42 whose tip end is an acute angle. According to this modification, when the user of the lighting fixture holds the adjustment unit 4 and performs the light distribution adjustment operation, the scale 42 functions as a non-slip, so that the operability is improved. In particular, the scale 42 shown in FIG. 10C has an acute-angled tip, so that it can be easily caught with the user's finger and the contact area with the user's finger can be reduced. It is difficult for the user to feel the heat of the adjusting unit 4. Moreover, since the surface area of the adjustment part 4 increases compared with the adjustment part 4 of the lighting fixture 1 by making the scale 42 into uneven | corrugated shape, the thermal radiation efficiency via the adjustment part 4 improves. The scale 42 is provided on a part of the outer periphery of the adjustment unit 4 in the present modification, but may be provided over the entire outer periphery of the adjustment unit 4.

  Next, the lighting fixture which concerns on the 4th modification of this embodiment is demonstrated with reference to FIG. The adjustment part 4 of this lighting fixture has the scale 42 used as the slit. Thereby, the light from the LED 21 (the optical path is indicated by a dotted arrow) leaks from the scale 42 to the outside of the adjustment unit 4, so that the scale 42 can be clearly seen even in a dark place.

  Next, the lighting fixture which concerns on the 5th modification of this embodiment is demonstrated with reference to Fig.12 (a) (b). The adjustment part 4 of the present lighting fixture has a scale 42 which is a slit, and the opening width (d1) outside the adjustment part 4 of the slit is set larger than the opening width (d2) inside the adjustment part 4. . Thereby, compared with the above-mentioned 4th modification, since the range which can visually confirm the light which leaked from the scale 42 becomes wide, the visibility of the scale 42 further improves.

  Next, the lighting fixture which concerns on the 6th modification of this embodiment is demonstrated with reference to FIG. The adjustment unit 4 of the lighting fixture has a scale 42 that is a slit, and a light diffusion member that diffuses light is provided in the slit. The light diffusing member is composed of, for example, a translucent milky white acrylic plate, a translucent resin plate containing a phosphor, or a translucent glass plate subjected to frost processing. For example, the light diffusing member is molded so as to be fitted in the slit and is fixed by being fitted into the slit, or is bonded and fixed to the slit by a silicone adhesive or the like. According to the present modification, it is possible to emit light from the scale 42 after diffusing the light from the LED 21 to reduce the directivity, and therefore, from a wider angle than the fourth modification described above. The scale 42 can be visually recognized.

  Next, the lighting fixture which concerns on the 7th modification of this embodiment is demonstrated with reference to Fig.14 (a) (b). The adjustment unit 4 of the present lighting fixture has a scale 42 that is a slit, and a light emission color conversion member including a phosphor that converts the wavelength of light from the LED 21 is provided in the slit. The phosphor is excited by blue light or yellow light emitted from the LED 21 and emits visible light. The adjustment unit 4 shown in FIG. 14A includes a scale 42 that includes different phosphors and emits light in different colors. As a result, the interval D can be known by identifying the color of the scale lines rather than counting the number of scale lines, so that quick light distribution adjustment is possible. Moreover, the adjustment part 4 shown by FIG.14 (b) has the scale 42 containing the fluorescent substance with high luminous efficiency as the light-projection surface side. Accordingly, the scale 42 on the light emitting surface side, which tends to be dark with a small amount of incident light from the LED 21, can be brightly emitted, and thus the visibility of the scale 42 is improved.

  Next, the lighting fixture which concerns on the 8th modification of this embodiment is demonstrated with reference to FIG. The adjustment unit 4 of the lighting fixture 11 has a cylindrical shape whose opening degree gradually decreases toward the light emitting surface side, and has a plurality of step portions 43 on the side surface. Each step portion 43 is provided over the entire circumference of the adjustment portion 4 and has a plurality of holes 44 that penetrate the adjustment portion 4 (see an enlarged perspective view). Thereby, since the light from the LED 21 leaks to the outside of the adjustment unit 4 through the hole 44, the stepped portion 43 can emit light and can be used as the scale 42. Since the opening degree becomes smaller as the adjustment unit 4 moves toward the light emitting surface, the light from the LED 21 is reliably incident on the stepped portion 43. Therefore, the scale 42 is always kept in a state with good visibility. Moreover, since the level | step-difference part 43 is provided over the perimeter of the adjustment part 4, the scale 42 can be visually recognized when seeing the lighting fixture 11 from which direction. Furthermore, since the scale 42 is not conspicuous when the LED 21 is turned off, it is difficult to impair the design of the lighting fixture 11. When the adjustment unit 4 is made of a resin such as PET, the stepped portion 43 may be light transmissive by reducing the thickness of the stepped portion 43.

  Moreover, in this embodiment and any modification, since the wiring board 22, the housing | casing 5, and the thermal radiation part 6 are comprised from the material with high heat conductivity, the heat | fever produced with light emission of LED21 is efficiently carried out. The life of the LED 21 can be extended by radiating heat to the outside.

  In addition, since the light reflecting member is provided on the LED 21 mounting surface of the wiring board 22, the light that has been totally reflected by the lens 31 and returned to the inner direction of the lighting fixture is reflected by the light reflecting member and illuminated again. Can be directed to the outside of the instrument. Thereby, the light extraction efficiency of the lighting fixture is improved.

  Furthermore, when the light emitting unit 2 and the light distribution control unit 3 are separated from each other, a part of the light emitted from the LED 21 may be directly incident on the flat portion of the light distribution control unit 3 without entering the lens 31. (See FIG. 7). Such light is not subjected to light distribution control by the lens 31, and thus may cause uneven irradiation or glare. Therefore, a light diffusing material for diffusing light may be added to the flat portion, or optical processing for diffusing light may be performed. Thereby, the light incident on the flat portion can be diffused, and the generation of uneven irradiation and glare can be reduced. The processing performed on the flat portion is not limited to the above, and for example, a light shielding member that shields light may be provided, or an optical process that shields light may be performed.

  In addition, the lighting fixture which concerns on this invention is not limited to the said embodiment and its modification, A various deformation | transformation is possible. For example, the light source is not limited to a white LED, and may be composed of an LED of another color, or may be composed of a light source such as an organic EL. In addition, the optical member is not limited to the lens having the above-described concave portion, and may be configured by a general convex lens, or may be configured by a reflector or the like instead of the lens. Furthermore, the light distribution control unit and the adjustment unit may be integrally formed.

DESCRIPTION OF SYMBOLS 1, 11 Lighting fixture 2 Light emission part 21 LED (light source)
3 Light distribution control unit 31 Lens (optical member)
4 Adjustment unit 42 Scale 5 Case D Distance between light emitting unit and light distribution control unit

Claims (3)

A light emitting unit having a plurality of light sources;
A light distribution control unit having a plurality of optical members provided facing each of the plurality of light sources;
An adjustment unit that holds the light distribution control unit and adjusts an interval between the light emitting unit and the light distribution control unit by moving the light distribution control unit in an optical axis direction of the light source;
A housing that houses the light emitting unit and accommodates the adjustment unit so as to be movable in an optical axis direction,
The adjustment unit has a scale provided along the optical axis direction at a position overlapping the casing within a range of movement with respect to the casing;
The scale is a slit, and is exposed to the outside of the housing when the interval is increased.   The luminaire according to claim 1, wherein a range in which the scale can be visually confirmed increases as the interval increases.   The lighting apparatus according to claim 1, wherein the scale has a concave shape.

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