JP2020009541A - Lighting device - Google Patents

Abstract

To provide a lighting device which includes a light emitting part and a cover which covers the light emitting part and can efficiently attain light presentation effect at an outer periphery part of the cover.SOLUTION: A lighting device 10 includes: a light emitting part 50; a cover 20 which is disposed in front of the light emitting part 50 and allows light emitted from the light emitting part 50 to penetrate therethrough; and an optical frame 30 which extends along an outer periphery part 21 of the cover 20. The optical frame 30 has a front surface part 32 which covers an outer periphery part front surface 21a and allows the light that has penetrated through the cover 20 to penetrate therethrough.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a lighting device having a light emitting unit and a cover disposed in front of the light emitting unit.

  Conventionally, a ceiling light installed on a ceiling is known as an example of a lighting device. For example, Patent Literature 1 discloses a ceiling light including a light emitting element, a shade, and a decorative frame. The seed has a peripheral light transmission area through which light is transmitted on the peripheral surface. The decorative frame is arranged around the shade, and has a reflective surface on which the peripheral light transmitting area of the shade is reflected when viewed from the light irradiation direction.

JP 2014-211997 A

  In a lighting device having a cover that covers the light-emitting portion, such as the above-described conventional ceiling light, by arranging a frame such as a decorative frame that transmits light emitted from the outer peripheral end surface of the cover around the cover, the radiance is increased. It is possible to add a light effect such as feeling.

  However, for example, in order to obtain a light effect in a wider range, it is necessary to extend the width of the frame body outward in the radial direction, and as a result, the size of the lighting device is increased. Further, in this case, the width of the frame increases in a direction away from the light emitting portion in a plan view, so that there is a problem that it is difficult to obtain an optical effect corresponding to the increase in the width of the frame.

  The present invention has been made by the inventors of the present application newly focusing on the above-described problem, and is a lighting device including a light-emitting unit and a cover that covers the light-emitting unit. It is an object of the present invention to provide a lighting device capable of obtaining an effect.

  In order to achieve the above object, a lighting device according to one embodiment of the present invention includes a light-emitting portion, a cover disposed in front of the light-emitting portion, and transmitting light emitted from the light-emitting portion, and an outer peripheral portion of the cover. The optical frame has a front surface portion that covers a front surface of the outer peripheral portion and that transmits light transmitted through the cover.

  ADVANTAGE OF THE INVENTION According to the illuminating device which concerns on this invention, the effect effect of light can be acquired efficiently in the outer peripheral part of a cover.

FIG. 2 is a perspective view of the lighting device according to the embodiment. FIG. 2 is an exploded perspective view of the lighting device according to the embodiment. FIG. 2 is a perspective view showing an optical frame and a cover according to the embodiment. FIG. 2 is a perspective view of the optical frame according to the embodiment when viewed obliquely from behind. It is sectional drawing which shows the structural relationship between the optical frame and cover which concern on embodiment. It is a top view showing the example of composition of the cover concerning an embodiment. FIG. 3 is a perspective view showing a specific example of a concave-convex portion of the optical frame according to the embodiment. It is a perspective view showing a case where a boundary between partial frames concerning an embodiment matches only a ridgeline of an uneven part.

  Hereinafter, a lighting device according to an embodiment of the present invention will be described in detail with reference to the drawings. Each of the embodiments described below shows a specific example of the present invention. Therefore, numerical values, shapes, materials, constituent elements, arrangement and connection forms of constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and do not limit the present invention. Therefore, among the components in the following embodiments, components that are not described in independent claims that represent the highest concept of the present invention are described as arbitrary components.

  In addition, each drawing is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, the scales and the like do not always match in each drawing. Further, in each of the drawings, substantially the same configuration is denoted by the same reference numeral, and redundant description will be omitted or simplified. Further, in the following embodiments and the claims, expressions indicating relative directions or postures, such as parallel and orthogonal, may be used. Not including the case. For example, “the two directions are parallel” means not only that the two directions are completely parallel, but also that they are substantially parallel, that is, including, for example, a difference of about several percent. Also means.

  Hereinafter, in the present specification, “forward” is the emission direction of the main light of the lighting device, and “rear” is the direction opposite to “forward”.

  Further, in this specification and the drawings, the X axis, the Y axis, and the Z axis indicate three axes of a three-dimensional orthogonal coordinate system. In the embodiment, the Z-axis direction is the vertical direction (up-down direction), and the direction perpendicular to the Z-axis (the direction parallel to the XY plane) is the horizontal direction. In addition, the positive direction of the Z-axis is vertically downward. Note that these items do not limit the posture of the lighting device according to the present invention when used.

(Embodiment)
[Configuration outline of lighting device]
FIG. 1 is a perspective view of a lighting device 10 according to the embodiment. FIG. 2 is an exploded perspective view of the lighting device 10 according to the embodiment.

  The lighting device 10 is, for example, a ceiling light that is installed on a ceiling of a building such as a house and illuminates a space below the ceiling. In each figure, the negative side of the Z axis is the ceiling side, and the positive side of the Z axis is the floor side. Further, for convenience of explanation, in each of the drawings, the lighting device 10 is shown in an upside down posture from the posture in normal use.

  As shown in FIGS. 1 and 2, the lighting device 10 includes a main body 40, a light emitting unit 50, a cover 20, an optical frame 30, and a power supply unit 71.

  The light emitting unit 50 emits light by electric power supplied from the power supply unit 71. In the present embodiment, the light emitting unit 50 is covered with the light source cover 60, and the light emitted from the light emitting unit 50 passes through the light source cover 60 and the cover 20 and is emitted to the outside of the lighting device 10. A part of the light transmitted through the cover 20 is transmitted through the optical frame 30 disposed on the outer peripheral portion of the cover 20 and is emitted to the outside.

[Main unit]
The main body 40 is a member that supports the light emitting unit 50. The main body 40 has a mounting surface 41 on which the light emitting unit 50 is mounted so as to emit light forward. A power supply case 70 for holding a power supply unit 71 is fixed to the back surface of the main body 40 (the surface on the back side of the mounting surface 41).

  In the present embodiment, the main body 40 has a disk shape (i.e., an annular shape) having a through hole at the center in plan view (when viewed from the Z-axis direction). The adapter 80 is inserted into the central through hole. The adapter 80 is attached to a hooking sealing body arranged on the ceiling of the building. That is, the lighting device 10 is arranged on the ceiling via the adapter 80.

  The main body 40 is manufactured by pressing a sheet metal such as an aluminum plate or a steel plate. A white paint may be applied to the front surface (the surface including the mounting surface 41) of the main body 40 in order to increase reflectivity and improve light extraction efficiency, or a reflective metal material may be used. It may be deposited.

[Light emitting unit]
The light emitting unit 50 is a light emitting module having a light source substrate 51 and a plurality of light emitting elements 52. In the present embodiment, the light source substrate 51 is configured by electrically connecting four separate substrates arranged in an annular shape, but for convenience of explanation, these four light source substrates are used. The group of substrates is treated as one light source substrate 51.

  The light source substrate 51 is, for example, a printed wiring board. On one surface of the light source substrate 51, a metal wiring is pattern-formed in a predetermined shape. As shown in FIG. 2, the light source substrate 51 is mounted on the mounting surface 41 of the main body 40 so that the plurality of light emitting elements 52 face the floor (upper side in FIG. 2). That is, the light emitting unit 50 is attached to the main body 40 in a posture of emitting light forward. Specifically, the light source substrate 51 is fixed to the mounting surface 41 of the main body 40 using a plurality of screws (not shown).

  The light source substrate 51 is, for example, a resin substrate made of an insulating resin material, a metal base substrate made of a metal material whose surface is coated with a resin, a ceramic substrate made of a sintered ceramic material, or a glass substrate made of a glass material. It is. The light source substrate 51 is not limited to a rigid substrate, but may be a flexible substrate. On the surface of the light source substrate 51, a resist film may be formed as an insulating film so as to cover the metal wiring.

The light emitting element 52 is, for example, a packaged surface mount (SMD: Surface Mount Device) LED element. That is, the light emitting element 52 has a white resin package (container) having a concave portion, an LED chip primarily mounted on the bottom surface of the concave portion of the package, and a sealing member sealed in the concave portion of the package. I have. As the LED chip, for example, a blue LED chip that emits blue light is employed. As the blue LED chip, for example, a gallium nitride based semiconductor light emitting device having a center wavelength of 440 nm to 470 nm and made of an InGaN based material is used. The sealing member contains phosphor particles for wavelength conversion. As the phosphor particles, for example, in order to obtain white light using blue light from an LED chip, for example, yellow phosphor particles of YAG (Yttrium Aluminum Garnet) are used. Thereby, a part of the blue light emitted from the LED chip is converted into a yellow light by the yellow phosphor particles. Then, the blue light not absorbed by the yellow phosphor particles and the yellow light obtained by the wavelength conversion by the yellow phosphor particles are combined and emitted as combined light (mainly white light in this example). You. The sealing member may include a light diffusing material (light scattering particles) such as silica (SiO ₂ ).

  Further, there is no particular limitation on the color of light emitted by the light emitting unit 50. For example, in the plurality of light emitting elements 52, a light emitting element 52 having a blue LED chip and a light emitting element 52 having a red LED chip are mixed, so that the light emitting section 50 emits orange light called a so-called light bulb color. May be.

  In the present embodiment, the light emitting unit 50 is covered by the light source cover 60. The light source cover 60 has a lens unit provided in one-to-one correspondence with the plurality of light emitting elements 52. The lens unit is configured to increase the light distribution angle of light from the corresponding light emitting element 52, for example. By arranging the lens portions corresponding to the individual light emitting elements 52 as described above, for example, the diffusion of light from each of the plurality of light emitting elements 52 can be precisely controlled. The light source cover 60 is formed using a light-transmitting resin material such as acrylic (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), or polyvinyl chloride.

[cover]
The cover 20 is a member that is disposed in front of the light emitting unit 50 and transmits light emitted from the light emitting unit 50, and is also called, for example, a “glove”. In the present embodiment, cover 20 has a gentle dome shape formed so that the center protrudes forward.

  The cover 20 is formed using a translucent resin material. As a material of the cover 20, for example, PMMA, PC, PET, polyvinyl chloride, or the like is employed.

  The cover 20 may have a light diffusing property (light scattering property). Thus, the light incident on the cover 20 can be diffused (scattered), and the light can be substantially uniformly extracted from the entire cover 20 to the outside. In this case, the cover 20 is, for example, milky white and can be formed by injection molding of a resin material in which light diffusion particles are dispersed. Further, a milky white light diffusion layer may be formed on the inner surface or the outer surface of the cover 20, and a plurality of light diffusion dots or minute unevenness (texture) may be formed on the cover 20.

  In the present embodiment, light is diffused to the portion not covered by the optical frame 30 so that the portion of the cover 20 covered by the optical frame 30 and the portion not covered by the optical frame 30 have different light transmittances. Processing has been done. This configuration example will be described later with reference to FIG.

  The cover 20 is detachably attached to the main body 40. Specifically, the cover 20 is attached to the main body 40 so as to be hooked on a plurality of locking portions 43 provided on the main body 40. Further, the cover 20 can be removed from the main body 40 by removing the cover 20 from the plurality of locking portions 43.

[Power supply unit]
The power supply unit 71 is a power supply device that generates electric power for lighting the light emitting unit 50. The power supply unit 71 converts AC power supplied from an external power supply such as a system power supply or a storage battery via the hooking sealing body and the adapter 80 to DC power and supplies the DC light to the light emitting unit 50.

  Specifically, the power supply unit 71 controls lighting (full lighting) and turning off of the light emitting unit 50. The power supply unit 71 may perform dimming or toning of the light emitting unit 50.

  The power supply unit 71 has, for example, a circuit board and a plurality of circuit elements mounted on the circuit board. Each of the plurality of circuit elements is, for example, a rectifier circuit element, a detection resistor, a fuse element, a resistor, a capacitor, a choke coil, a diode or a transistor. The power supply unit 71 is held by the main body 40 in a state of being housed in a power supply case 70 fixed to the back surface of the main body 40.

[Optical frame]
The illumination device 10 configured as described above includes the optical frame 30 disposed along the outer peripheral portion of the cover 20. Hereinafter, the optical frame 30 according to the present embodiment will be described with reference to FIGS. 3 to 5 in addition to FIGS. 1 and 2.

  FIG. 3 is a perspective view showing the optical frame 30 and the cover 20 according to the embodiment. FIG. 4 is a perspective view of the optical frame 30 according to the embodiment as viewed obliquely from behind. 3 and 4, the optical frame 30 is shown in a state where it is disassembled into two partial frames 31. FIG. 5 is a cross-sectional view illustrating a structural relationship between the optical frame 30 and the cover 20 according to the embodiment. Specifically, FIG. 5 illustrates a part of the VV cross section in FIG.

  The optical frame 30 is a member that extends along the outer peripheral portion 21 of the cover 20, and is a member that performs diffusion, focusing, color conversion, and the like on light transmitted through the optical frame 30. Specifically, the optical frame 30 has a front surface portion 32 that covers the front surface of the outer peripheral portion 21 (the outer peripheral surface front surface 21a) and transmits light transmitted through the cover 20.

  The front part 32 has an uneven part (not shown in FIGS. 1 to 5) formed by, for example, a plurality of concaves or convexes. Light transmitted through the front part 32 is scattered by the uneven part, This makes it possible to add a sense of brightness to the illumination light emitted from the illumination device 10. Further, a predetermined pattern may be formed by the arrangement of the concaves or convexes in the concave and convex portions. In this case, the predetermined pattern can be made to emerge. Note that a specific example of the uneven portion of the front surface portion 32 will be described later with reference to FIG.

  Here, light transmitted through only the cover 20 is emitted from a central portion 22 of the cover 20 which is a portion inside the outer peripheral portion 21, that is, a portion not covered by the optical frame 30. That is, in the lighting device 10 according to the present embodiment, the central portion 22 of the cover 20 functions as a portion that emits illumination light that illuminates the room where the lighting device 10 is installed, and at least the front surface portion 32 of the optical frame 30 It functions as a part for adding a light effect to the illumination light.

  As described above, the lighting device 10 according to the present embodiment includes the light emitting unit 50, the cover 20 disposed in front of the light emitting unit 50, and transmitting the light emitted from the light emitting unit 50, and the outer peripheral portion 21 of the cover 20. And an optical frame 30 extending along the line. The optical frame 30 has a front surface portion 32 that covers the outer peripheral portion front surface 21a and that transmits the light transmitted through the cover 20.

  According to this configuration, the front surface portion 32, which is a part of the optical frame 30, is disposed so as to cover the outer peripheral surface front surface 21a of the cover 20, so that the light emitted by the light emitting unit 50 can be efficiently used. Thus, it is possible to add an effect such as a feeling of brightness to the illumination light.

  Further, for example, when the width (frame width) of the front part 32 is increased in order to obtain a light effect in a wider range, the width of the front part 32 is increased inward in the radial direction. Therefore, it is possible to obtain a light effect in a wider range without increasing the size of the lighting device 10. Further, in this case, in plan view, the width of the front surface portion 32 is increased in a direction approaching the light emitting unit 50, so that the light emitted by the light emitting unit 50 can be more efficiently used to add a light effect. it can.

  As described above, according to lighting device 10 of the present embodiment, it is possible to efficiently obtain a light effect at outer peripheral portion 21 of cover 20.

  Note that, in the present embodiment, the optical frame 30 which is a portion for adding a light effect on the outer peripheral portion 21 of the cover 20 is separate from the cover 20. Accordingly, for example, the optical frames 30 having different frame widths or different shape irregularities can be attached to each of the plurality of lighting devices 10 including the covers 20 having the same shape and size. Therefore, it is possible to easily produce a plurality of lighting devices 10 having different light effect.

  Further, in the present embodiment, as shown in FIGS. 3 to 5, the optical frame 30 further covers the end surface of the outer peripheral portion 21 (the outer peripheral end surface 21 b), and the side surface portion 33 that transmits the light transmitted through the cover 20. have.

  According to this configuration, the side surface portion 33 can scatter, condense, or convert the light emitted from the outer peripheral end surface 21b of the cover 20 and emit the light. In other words, in a plan view, a light effect can be added by using light traveling from the light emitting unit 50 to the outside in the radial direction. Further, for example, by forming the side surface portion 33 so as to guide at least a part of the light incident on the side surface portion 33 to the front surface portion 32, the light emitted from the outer peripheral end surface 21b of the cover 20 can be used. 32 can increase the amount of light emitted.

  Further, in the present embodiment, the optical frame 30 is disposed so as to surround the front surface portion 32 and has a flange portion 34 which is a portion protruding outside the side surface portion 33. The flange portion 34 is formed with, for example, the same concave and convex portions as the front surface portion 32, so that a rendering effect such as a shining feeling can be added to the illumination light. That is, in the present embodiment, the optical frame 30 has both the front surface 32 protruding on the front side (radially inside) of the cover 20 and the flange 34 protruding outside (radially outside) of the cover 20. In addition, a light effect can be added to the illumination light.

  Further, as shown in FIG. 5, since the side surface portion 33 is connected to the flange portion 34, the amount of light emitted from the flange portion 34 is increased by the light guided from the side surface portion 33 to the flange portion 34. It is also possible.

  In the present embodiment, the light emitting unit 50 is covered with the light source cover 60, and the light source cover 60 has a corresponding lens unit that enlarges the light distribution angle of light from the corresponding light emitting element 52. . Therefore, the light source cover 60 functions as a member that allows a part of the light emitted from the light emitting unit 50 to efficiently enter the front surface 32 and the side surface 33 of the optical frame 30. Thereby, the light effect by the optical frame 30 is enhanced.

  Further, in the present embodiment, as shown in FIGS. 1 to 4, the optical frame 30 is connected to a plurality of partial frames 31 arranged side by side in the extending direction of the optical frame 30 (the circumferential direction of the cover 20). It is formed by being done. Specifically, in plan view, one circular optical frame 30 is formed by connecting two arc-shaped partial frames 31. In FIGS. 1 and 2, the boundary 38 between the two partial frames 31 is indicated by a dotted line.

  Here, in the present embodiment, as shown in FIG. 5, the outer peripheral portion 21 of the cover 20 has a rear surface (outer peripheral surface) extending inward from an outer peripheral end surface 21b parallel to the front-rear direction (Z-axis direction). Part back 21c). The side surface portion 33 of the optical frame 30 is formed so as to cover from the outer peripheral end face 21b to the outer peripheral rear face 21c. Thus, the optical frame 30 can use the light transmitted through the outer peripheral portion 21 of the cover 20 almost without leakage, and use the light for a light effect. However, in this case, the optical frame 30 has a shape sandwiching the outer peripheral portion 21 of the cover 20 from front and rear. Therefore, it is difficult to manufacture the annular optical frame 30 as a single component, and it is not practical, for example, from the viewpoint of manufacturing cost, and it is substantially impossible to attach the optical frame 30 to the cover 20.

  Therefore, in the present embodiment, the optical frame 30 is formed by two arc-shaped partial frames 31, as shown in FIGS. Thereby, as shown in FIG. 3, each of the two partial frames 31 can be attached to the cover 20 from the lateral direction (the direction parallel to the XY plane). Further, compared to the case where the annular optical frame 30 is divided by a horizontal plane, for example, the continuity of the material from the side surface portion 33 to the front surface portion 32 (or the flange portion 34) is not lost. Therefore, according to the optical frame 30 according to the present embodiment, for example, loss of light guided from the side surface portion 33 to the front surface portion 32 (or the flange portion 34) is suppressed.

  As shown in FIG. 4, the partial frame 31 formed in the arc shape has a first connecting portion 31a at one end in the longitudinal direction and a second connecting portion 31b at the other end. have. The two partial frames 31 are arranged as shown in FIG. 3, and thereafter, the first connection portion 31a of one of the two partial frames 31 and the second connection portion of the other partial frame 31 31b. For example, the first connection part 31a and the second connection part 31b are fastened with screws. As a result, the two partial frames 31 are connected, thereby forming the optical frame 30 that covers the outer peripheral portion 21 of the cover 20. The optical frame 30 is fixed to the cover 20 by, for example, screws (not shown). That is, the optical frame 30 and the cover 20 are treated as an integral unit after the lighting device 10 is assembled and after the lighting device 10 is completed.

  That is, the lighting device 10 according to the present embodiment has the main body 40 to which the light emitting unit 50 is supported and the cover 20 is detachably attached, and the optical frame 30 is fixed to the cover 20. Therefore, for example, when cleaning the inner surface of the cover 20, the optical frame 30 and the cover 20 can be easily removed from the main body 40 together. That is, when the cover 20 is removed from the main body 40, the work of removing the optical frame 30 from the main body 40 or the cover 20 is unnecessary. That is, in the present embodiment, the optical frame 30 is disposed on the lighting device 10 in a manner that does not impair the ease of maintenance of the lighting device 10.

[Details of light transmittance of cover]
As described above, the optical frame 30 transmits the light transmitted through the outer peripheral portion 21 of the cover 20. Therefore, the portion of the optical frame 30 in the illuminating device 10 may have a lower (darker) light amount than the central portion 22 of the cover 20 that is not covered by the optical frame 30. However, in the present embodiment, the light transmittance of the outer peripheral portion 21 of the cover 20 is higher than the light transmittance of the central portion 22 which is a portion inside the outer peripheral portion 21 of the cover 20. As a typical example, in the cover 20, the outer peripheral portion 21 is transparent and the central portion 22 is opaque. Thus, light can be supplied to the optical frame 30 while suppressing loss of light transmitted through the outer peripheral portion 21. Therefore, for example, the effect of producing light by the optical frame 30 becomes clearer. In addition, for example, a large difference in brightness between the central portion 22 of the cover 20 and the optical frame 30 hardly occurs.

  The cover 20 having the light transmittance different between the outer peripheral portion 21 and the central portion 22 as described above is manufactured by, for example, resin molding using different resin materials at the outer peripheral portion 21 and the central portion 22. Is also good. Also, for example, a transparent resin material such as PMMA is used to form a fine unevenness only in the central portion 22 so that the central portion 22 has a light diffusion surface and the outer peripheral portion is formed. The cover 21 may be made transparent.

  In addition, the outer peripheral portion 21 and the central portion 22 are provided with different patterns on the entirely transparent cover 20 by, for example, printing, or the pattern is printed only on the central portion 22 so that the light of the outer peripheral portion 21 is printed. The transmittance may be higher than the light transmittance of the central part 22.

  FIG. 6 is a plan view illustrating a configuration example of the cover 20 according to the embodiment. In the cover 20 shown in FIG. 6, the central portion 22 has a light transmittance lower than that of the outer peripheral portion 21 by having the light diffusion layer 25 formed by printing on the surface of the base material of the cover 20.

  According to this configuration, since the light diffusion layer 25 of the central portion 22 is formed by printing, for example, the degree of light diffusion in the central portion 22 or the range of the central portion 22 can be easily changed. . Further, for example, as described above, the light diffusing function can be easily performed as compared with a case where different resin materials are used for the outer peripheral portion 21 and the central portion 22 and a case where fine irregularities are formed only in the central portion 22. Can be held by the cover 20.

  Specifically, the light diffusion layer 25 is obtained by printing minute dots (dot patterns) distributed and arranged on the central portion 22 by silk printing using a colored ink such as white or milky white, for example. Can be. More specifically, a dot pattern is printed on a flat plate made of a resin material such as PMMA by using a printing technique such as silk printing. Further, the flat plate on which the dot pattern is printed is formed into a predetermined shape by air pressure forming. Thereby, the cover 20 on which the dot pattern as the light diffusion layer 25 is formed is obtained. When performing the silk printing, for example, the dot density may be changed depending on the printing position. Thereby, the light transmittance of the light diffusion layer 25 can be changed at an arbitrary position.

  Further, the light diffusion layer 25 may be formed also on the outer peripheral portion 21. In this case, for example, by making the density of the dots in the outer peripheral portion 21 smaller than the density of the dots in the central portion 22, the light transmittance of the outer peripheral portion 21 can be made larger than the light transmittance of the central portion 22. it can. The light diffusion layer 25 does not need to be formed by a dot pattern. For example, the light diffusion layer 25 may be formed by a plurality of lines arranged in a grid. Further, the light diffusion layer 25 having different thicknesses or dot densities depending on positions may be formed so that a predetermined symbol appears on the central portion 22 when the light emitting section 50 emits light.

[Specific examples of concave and convex portions of optical frame]
FIG. 7 is a perspective view illustrating a specific example of the uneven portion 36 included in the optical frame 30 according to the embodiment. In FIG. 7, the boundary 38 between the two partial frames 31 is indicated by a bold dotted line.

  As shown in FIG. 7, the optical frame 30 has, for example, an uneven portion 36 composed of a plurality of prism-shaped convex portions arranged according to a predetermined regularity. Thus, when the light emitting unit 50 emits light, the optical frame 30 can bring out a shining feeling like cut glass.

  Here, the optical frame 30 is formed by connecting the plurality of partial frames 31 as described above, and there is a possibility that the boundary 38 between the partial frames 31 may cause a problem in appearance. Therefore, the boundary 38 between the two partial frames 31 can be made inconspicuous by the uneven portion 36.

  For example, in FIG. 7, a boundary 38 between two adjacent partial frames 31 of the plurality of partial frames 31 coincides with at least one of a ridge line and a valley line in the uneven portion 36. This makes it difficult to visually recognize the boundary 38 between the two partial frames 31. That is, the plurality of partial frames 31 are combined so that the boundaries 38 are not noticeable.

  Further, in the example shown in FIG. 7, an uneven portion 36 is provided on the front surface portion 32 and the flange portion 34 of the optical frame 30. Therefore, the entire boundary 38 between the two partial frames 31 in plan view can be matched with a series of ridges or valleys from the inner edge to the outer edge of the optical frame 30. Therefore, the optical frame 30 is visually recognized as one annular optical member in appearance. This is advantageous from the viewpoint of the effectiveness of the optical effect such as the brightness.

  The shape of the uneven portion 36 of the optical frame 30 is not limited to the shape illustrated in FIG. 7. For example, the uneven portion 36 is formed by randomly distributing smaller protrusions or recesses. Is also good.

  In addition, in the example shown in FIG. 7, the front surface portion 32 and the flange portion 34 have the uneven portions 36 of the same shape, but the front surface portion 32 and the flange portion 34 may have the uneven portions of different shapes. Good. That is, the optical frame 30 may add a different light effect to the illumination light between the front surface portion 32 and the flange portion 34.

  Further, the effect that the boundary 38 between the two partial frames 31 becomes inconspicuous is exerted even when the boundary 38 coincides with only one of the ridge line and the valley line of the uneven portion 36. For example, as shown in FIG. 8, the boundary 38 between the two partial frames 31 may coincide only with the ridgeline of the prismatic uneven portion 36.

(Other embodiments)
As described above, the lighting device according to the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment.

  For example, the optical frame 30 does not need to have all of the front surface 32, the side surface 33, and the flange 34. The optical frame 30 only needs to have at least the front surface part 32. In other words, if the optical frame 30 has the front surface portion 32 that covers the outer peripheral surface front surface 21a of the cover 20, the light transmitted through the cover 20 is efficiently used, and the illumination light emitted by the illumination device 10 shines. And other effects can be added.

  Further, the optical frame 30 may be formed by three or more partial frames. For example, the annular optical frame 30 in plan view may be formed by three arc-shaped partial frames having a central angle of 120 °. As described above, when the optical frame 30 is formed by a plurality of partial frames having the same shape and the same size, for example, all of the plurality of partial frames can be manufactured with one mold. This is advantageous, for example, from the viewpoint of suppressing manufacturing costs.

  Further, the optical frame 30 may be formed of a plurality of partial frames obtained by dividing the optical frame 30 in a horizontal plane (a direction parallel to the XY plane). For example, the optical frame 30 may be divided into a rear partial frame including the side surface portion 33 and a front partial frame including the front surface portion 32 and the flange portion 34. In this case, the outer peripheral portion 21 of the cover 20 is disposed between the rear partial frame and the front partial frame so as to sandwich the outer peripheral portion 21 from the front and rear, and the rear partial frame and the front partial frame are connected with screws or the like. Thus, the optical frame 30 that covers the outer peripheral portion 21 of the cover 20 is formed. As described above, when the optical frame 30 is formed of the two front and rear partial frames, the boundary between the two partial frames does not appear on the front side of the optical frame 30, and therefore, the boundary is unlikely to cause a problem in appearance.

  Further, the length of the width of the front surface portion 32 of the cover 20 is not particularly limited. For example, the ratio of the width of the front surface portion 32 to the radius of the cover 20 is about 0.3 to 0.4. Note that the ratio is appropriately determined according to the size of the cover 20, the thickness of the front surface portion 32, the light output of the light emitting section 50, the use of the lighting device 10, the manufacturing cost of the lighting device 10, or the design requirement. May be done.

  Further, the optical frame 30 may not have the concave and convex portions 36. That is, the outer surface of the optical frame 30 may have a flat shape. Even in this case, for example, by forming the optical frame 30 from a resin material containing light scattering particles such as silica, light transmitted through the optical frame 30 can be diffused and emitted. Alternatively, by forming the optical frame 30 with a colored resin material that transmits light, the color of light transmitted through the optical frame 30 can be converted and emitted.

  Further, the optical frame 30 may have an uneven portion formed by arranging a plurality of concaves or convexes on the back surface (the surface on the cover 20 side). Even in this case, the light transmitted through the optical frame 30 can be diffused and emitted.

  The light emitting element 52 included in the light emitting unit 50 is an SMD type LED element, but the light emitting element 52 may be an LED chip. That is, the light emitting unit 50 may have a COB (Chip On Board) structure in which a plurality of LED chips are directly mounted on the light source substrate 51. In this case, a plurality of LED chips mounted on the light source substrate 51 are collectively sealed or individually sealed by a sealing member containing a wavelength conversion material, so that illumination light of a predetermined color temperature is emitted. Obtainable.

  Further, as another example of the light emitting element 52, a semiconductor light emitting element such as a semiconductor laser, or an EL element such as an organic EL (Electro Luminescence) or an inorganic EL is given.

  In addition, the present invention can be realized by arbitrarily combining the components and functions of the embodiment without departing from the spirit of the present invention and a form obtained by performing various modifications conceivable by those skilled in the art to the embodiment. Embodiments are also included in the present invention.

DESCRIPTION OF SYMBOLS 10 Illumination device 20 Cover 21 Outer peripheral part 21a Outer peripheral part front surface 21b Outer peripheral part end surface 22 Central part 25 Light diffusion layer 30 Optical frame 31 Partial frame 32 Front part 33 Side part 36 Uneven part 38 Boundary 40 Body part 50 Light emitting part

Claims (7)

A light emitting unit,
A cover disposed in front of the light emitting unit and transmitting light emitted from the light emitting unit,
An optical frame extending along the outer peripheral portion of the cover,
The illuminating device, wherein the optical frame has a front surface portion that covers a front surface of the outer peripheral portion, and has a front surface portion that transmits light transmitted through the cover. The lighting device according to claim 1, wherein the optical frame further includes a side surface that covers an end surface of the outer peripheral portion and transmits light transmitted through the cover. The lighting device according to claim 1, wherein the optical frame is formed by connecting a plurality of partial frames arranged side by side in an extending direction of the optical frame. The front surface of the optical frame has an uneven portion formed by arranging a plurality of concave or convex,
The lighting device according to claim 3, wherein a boundary between two adjacent partial frames of the plurality of partial frames coincides with at least one of a ridge line and a valley line in the uneven portion. The lighting device according to any one of claims 1 to 4, wherein a light transmittance of the outer peripheral portion of the cover is higher than a light transmittance of a central portion of the cover, which is an inner portion of the outer peripheral portion. The lighting device according to claim 5, wherein the central portion of the cover has a light diffusion layer formed by being printed on a surface of a base material of the cover, so that light transmittance is lower than that of the outer peripheral portion. Furthermore, it has a main body that supports the light emitting unit, and the cover is detachably attached,
The lighting device according to claim 1, wherein the optical frame is fixed to the cover.

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