JP2018060737A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which includes a light emitting part and a light source cover covering the light emitting part and can efficiently extract light emitted by the light emitting part.SOLUTION: A luminaire 1 includes: a luminaire body 10; a light emitting module 20 which is attached to the luminaire body 10 in a posture at which the light emitting module 20 emits light to the front side; and a light source cover 30 which is attached to the luminaire body 10 so as to cover the light emitting module 20 and has light transmissivity. An end surface of the light source cover 30 has an inclined surface part which inclines relative to a light emission direction of a light emitting part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a lighting fixture having a light emitting part and a light source cover covering the light emitting part.

  Conventionally, as an example of a lighting fixture, a ceiling light installed on a ceiling is known. For example, Patent Literature 1 includes an instrument main body attached to a ceiling via an adapter, a substrate supported on a substrate arrangement surface of the instrument main body, a light source unit arranged on the substrate, and a diffusion member (lens member). A ceiling light is provided. The light source section includes a substrate and a plurality of light emitting elements mounted on the substrate, and the diffusion member is disposed so as to cover the entire surface of the substrate including the light emitting elements.

JP 2012-146666 A

  In the lighting fixture having a cover such as a diffusing member that covers the light emitting portion, as in the above-described conventional ceiling light, various optical devices such as diffusing light transmitted from the inside to the outside of the cover with a lens are made. Yes. However, no optical consideration is given to light that travels in the direction intersecting the thickness direction within the thickness of the cover (between the outer surface and the inner surface) and is emitted from the end surface.

  An object of the present invention is to provide a lighting fixture including a light emitting portion and a light source cover that covers the light emitting portion in consideration of the above-described conventional problems, and capable of efficiently extracting light emitted from the light emitting portion. And

  In order to achieve the above object, a lighting fixture according to an aspect of the present invention includes a fixture main body, a light emitting portion attached to the fixture main body in a posture of emitting light forward, and the fixture covering the light emitting portion. A light source cover having translucency attached to the main body, and an end surface of the light source cover has an inclined surface portion inclined with respect to a light emitting direction of the light emitting portion.

  According to the luminaire according to the present invention, the light emitted from the light emitting unit can be efficiently extracted.

It is a perspective view of the lighting fixture which concerns on embodiment. It is a disassembled perspective view of the lighting fixture which concerns on embodiment. It is a perspective view which shows the state which removed the cover of the lighting fixture which concerns on embodiment. It is a 1st sectional view showing the composition of the light source cover concerning an embodiment. It is an expanded sectional view which shows the structure of the end surface of the inner peripheral side of the light source cover which concerns on embodiment. It is a cross-sectional enlarged view which shows the structure of the light source cover in a comparative example. It is a 2nd sectional view showing the composition of the light source cover concerning an embodiment. It is a perspective view which shows the external appearance of the light source cover which concerns on the modification 1 of embodiment. It is an expanded sectional view which shows the structure of the light source cover which concerns on the modification 2 of embodiment.

  Below, the lighting fixture which concerns on embodiment of this invention is demonstrated in detail using drawing. It should be noted that each of the embodiments described below and modifications thereof shows a specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement and connection forms of constituent elements, processes, order of processes, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. Therefore, for example, the scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code | symbol is attached | subjected about the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

  Hereinafter, in this specification, “front” is the main light emitting direction of the lighting fixture (light emitting module), and “rear” is the direction opposite to “front”.

  In the present specification and drawings, the x axis, the y axis, and the z axis indicate the three axes of the 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. In addition, these matters do not limit the posture at the time of use of the lighting fixture according to the present invention.

(Embodiment)
[Overview]
First, the outline | summary of the lighting fixture 1 which concerns on embodiment is demonstrated using FIGS. 1-3.

  FIG. 1 is a perspective view of a lighting fixture 1 according to the present embodiment. FIG. 2 is an exploded perspective view of the lighting fixture 1 according to the present embodiment. FIG. 3 is a perspective view showing a state where the cover 40 of the lighting fixture 1 according to the present embodiment is removed.

  The lighting fixture 1 shown by FIGS. 1-3 is installed in the construction material of buildings, such as a house, for example. As an example, the lighting fixture 1 is a ceiling light fixed to the ceiling of a building, and illuminates a space inside the building. Specifically, the luminaire 1 is installed on the ceiling by being attached to a hook ceiling body fixed to 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. Moreover, for convenience of explanation, in each figure, the lighting apparatus 1 is illustrated in a posture that is upside down from the posture during normal use.

  As shown in FIGS. 1 to 3, the lighting fixture 1 includes a fixture body 10, a light emitting module (light emitting portion) 20, a light source cover 30, a cover 40, and a power supply unit 70.

  The light emitting module 20 emits light by the electric power supplied from the power supply unit 70. The light emitted from the light emitting module 20 passes through the light source cover 30 and the cover 40 and is emitted to the outside of the lighting fixture 1.

  Next, with reference to FIGS. 1 to 3, each component of the lighting fixture 1 will be described in detail with reference to FIGS. 4 to 7.

[Equipment body]
The instrument body 10 is a housing that supports the light emitting module 20. The instrument body 10 has a placement surface 11 on which the light emitting module 20 is placed so as to emit light forward. The instrument body 10 further supports the power supply unit 70.

  More specifically, the instrument body 10 includes a placement surface 11, a peripheral edge portion 13, and a through hole 14 as shown in FIGS. 2 and 3. In the present embodiment, the instrument body 10 has, for example, a flat shape. Specifically, the shape of the instrument body 10 in a plan view (when viewed from the z-axis direction) is a disc shape (that is, an annular shape) in which a through hole 14 is provided in the center. In the instrument body 10, the mounting surface 11 is provided in an annular shape over the entire circumference of the through hole 14 so as to surround the through hole 14.

  Moreover, the peripheral part 13 is provided over the perimeter so that the mounting surface 11 may be enclosed. A cushioning material 15 such as urethane is provided on the rear side (ceiling side) of the peripheral edge portion 13. An adapter for attaching to the hooking sealing body is inserted into the central through hole 14.

  The mounting surface 11 is a main surface on the floor side of the instrument body 10 and is a surface to which the light emitting module 20 is attached. As shown in FIG. 2, the mounting surface 11 is positioned forward (on the positive side of the z axis) with respect to the peripheral edge portion 13 provided annularly along the outer periphery thereof. Thus, a space for storing the power supply unit 70 is provided on the opposite side of the placement surface 11.

  The instrument body 10 is formed into a predetermined shape by pressing a sheet metal such as an aluminum plate or a steel plate. One surface (the surface including the mounting surface 11) of the instrument body 10 may be coated with a white paint in order to enhance reflectivity and improve light extraction efficiency, or a reflective metal material. May be deposited.

[Light Emitting Module (Light Emitting Unit)]
The light emitting module 20 is an example of a light emitting unit attached to the fixture body 10 of the lighting fixture 1 and emits light of a predetermined color (wavelength) such as white. As shown in FIG. 2, each light emitting module 20 includes a light source substrate 21 and a plurality of light emitting elements 22. In the present embodiment, the light source substrate 21 is configured by connecting four separate substrates arranged in an annular shape. For convenience of explanation, a set of these four substrates is used. The body is treated as a single light source substrate 21.

  The light source substrate 21 is a mounting substrate on which a plurality of light emitting elements 22 are mounted. The light source substrate 21 is, for example, a printed wiring board, and a metal wiring pattern is formed in a predetermined shape on one surface of the light source substrate 21. As shown in FIG. 2, the light source substrate 21 is placed on the placement surface 11 of the instrument body 10 such that the plurality of light emitting elements 22 face the floor surface side. That is, the light emitting module 20 is attached to the instrument body 10 in a posture in which light is emitted forward. Specifically, the light source substrate 21 is fixed to the mounting surface 11 of the instrument body 10 using a plurality of screws (not shown).

  The light source substrate 21 is formed in an annular shape in plan view. That is, the light emitting module 20 is formed in an annular shape when viewed from the front, and more specifically, the planar view shape of the light emitting module 20 is an annular shape (a donut shape).

  The light source substrate 21 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 that is a sintered body of a ceramic material, or a glass substrate made of a glass material. It is. The light source substrate 21 is not limited to a rigid substrate, and may be a flexible substrate. A resist film may be formed on the surface of the light source substrate 21 as an insulating film so as to cover the metal wiring.

  The light emitting element 22 is a semiconductor light emitting element that emits light with a predetermined electric power, such as an LED (Light Emitting Diode). The light emitting element 22 is, for example, a bare chip that emits monochromatic visible light, and specifically, a blue LED chip that emits blue light. The plurality of light emitting elements 22 are arranged in a plurality of rows or a matrix along the circumferential direction on the main surface of the light source substrate 21.

  The plurality of light emitting elements 22 are individually sealed by a sealing member (not shown). Alternatively, the plurality of light emitting elements 22 may be collectively sealed for each element row, or all the light emitting elements 22 on the light source substrate 21 may be collectively sealed.

The sealing member includes, for example, a translucent resin material such as silicone resin as a main component, and includes a wavelength conversion material that converts the wavelength of light from the light emitting element 22. The wavelength conversion material is, for example, phosphor particles, and specifically, yellow phosphor particles. In the present embodiment, the light emitting module 20 emits white light by mixing the blue light emitted from the light emitting element 22 and the yellow light emitted when the yellow phosphor particles are excited by the blue light. The sealing member may contain a light diffusing material (light scattering particles) such as silica (SiO ₂ ).

  Moreover, there is no limitation in particular in the color of the light which the light emitting module 20 emits. For example, the light emitting module 20 may emit orange light called a so-called light bulb color by the plurality of light emitting elements 22 including one or more blue LED chips and one or more red LED chips. .

  The light emitting module 20 may be an SMD (Surface Mounted Device) type module. Specifically, a package type LED element (SMD type LED element) may be mounted on the light source substrate 21. The package-type LED element includes, for example, a resin container having a recess (cavity), an LED chip mounted in the recess, and a sealing member (phosphor-containing resin) sealed in the recess. .

[cover]
The cover 40 is a translucent cover having translucency, and is also called, for example, a “glove”. As shown in FIGS. 1 and 2, the cover 40 is an outer cover that forms an outer shell of the lighting fixture 1. The cover 40 covers the light emitting module 20 and the light source cover 30 by being disposed on the front side of the instrument body 10. In the present embodiment, the cover 40 has a gently curved surface (light emitting surface) formed so that the center protrudes forward.

  The cover 40 transmits light emitted from the light emitting element 22. Specifically, the cover 40 transmits light emitted from the light emitting element 22 and passed through the light source cover 30.

  The cover 40 is formed using a resin material having translucency. The material of the cover 40 is, for example, acrylic (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), or polyvinyl chloride.

  The cover 40 may have light diffusibility (light scattering). Thereby, the light incident on the cover 40 can be diffused (scattered), and the light can be extracted from the entire cover 40 substantially uniformly. In this case, the cover 40 is, for example, milky white and can be formed of a resin material in which light diffusion particles are dispersed. Further, a milky white light diffusion film may be formed on the inner surface or the outer surface of the cover 40, and a plurality of light diffusion dots or minute irregularities (textures) may be formed on the cover 40.

  The cover 40 is detachably attached to the instrument body 10. Although the attachment method is not particularly limited, for example, the cover 40 is fixed so as to be caught by a locking portion provided at the peripheral portion of the instrument body 10. Specifically, the cover 40 and the instrument body 10 each have a locking portion and a locked portion that are locked to each other, and are fixed by locking the locking portion and the locked portion.

[Light source cover]
The light source cover 30 is a cover member having translucency. As shown in FIGS. 2 and 3, the light source cover 30 is attached to the instrument body 10 so as to cover the light emitting module 20. In the present embodiment, the light source cover 30 is fixed to the placement surface 11 of the instrument body 10 using screws (not shown).

  The light source cover 30 is formed using a resin material having translucency. The material of the light source cover 30 is, for example, PMMA, PC, PET, or polyvinyl chloride.

  For example, the light source cover 30 has a function of protecting the light emitting module 20 from foreign matters such as external dust and controlling and transmitting light emitted from the light emitting module 20. Specifically, the light source cover 30 can suppress the light graininess (brightness unevenness) of the light emitting elements 22 by diffusing the light emitted from the light emitting elements 22 of the light emitting module 20. .

  Here, a part of the light emitted from the plurality of light emitting elements 22 and incident on the light source cover 30 is repeatedly reflected within the thickness of the light source cover 30 (between the outer surface and the inner surface) and reaches the end surface of the light source cover 30. To do. That is, a part of the light emitted from the plurality of light emitting elements 22 reaches the end face of the light source cover 30 by repeating reflection at the interface between the inside of the light source cover 30 (in the thickness) and the atmosphere or the instrument body 10. To do.

  The lighting fixture 1 according to the present embodiment has a configuration in which light that travels within the thickness of the light source cover 30 and reaches the end surface of the light source cover 30 can be effectively used as illumination light. Details of the configuration of the light source cover 30 will be described below with reference to FIGS.

  FIG. 4 is a first cross-sectional view illustrating the configuration of the light source cover 30 according to the embodiment. Specifically, FIG. 4 shows an outline of the IV-IV cross section in FIG. FIG. 5 is an enlarged cross-sectional view showing the configuration of the inner peripheral end face 31 of the light source cover 30 according to the embodiment. FIG. 6 is an enlarged cross-sectional view showing the configuration of the light source cover 300 in the comparative example. FIG. 7 is a second cross-sectional view illustrating the configuration of the light source cover 30 according to the embodiment.

  In the lighting fixture 1 according to the present embodiment, the end surface 31 on the inner peripheral side of the light source cover 30 is along the inclined surface portion 31 a inclined with respect to the light emitting direction of the light emitting module 20 and the thickness direction of the light source cover 30. And an edge portion 31b forming a surface. Similarly, the end surface 32 on the outer peripheral side of the light source cover 30 is similarly inclined with respect to the light emitting direction of the light emitting module 20 and the end edge portion 32 b that forms a surface along the thickness direction of the light source cover 30. And have.

  The light emission direction of the light emitting module 20 is a main direction of light emitted from the light emitting module 20 as illumination light, and is a positive z-axis direction in the present embodiment. In the present embodiment, the thickness direction of the light source cover 30 is parallel to the light emitting direction of the light emitting module 20, that is, parallel to the z-axis direction. In the present embodiment, the light emission direction of the light emitting module 20 is parallel to the normal line of the main surface of the light source substrate 21 (the surface on which the plurality of light emitting elements 22 are mounted). That is, the normal line of the main surface of the light source substrate 21 is also parallel to the z-axis direction.

  For example, when focusing on the end surface 31 on the inner peripheral side of the light source cover 30, the inclined surface portion 31 a of the end surface 31 has a light emission direction (z-axis positive direction) of the light emitting module 20 as shown in FIG. 5. As a result, the light emitted from the inclined surface portion 31a travels toward the front of the luminaire 1. That is, the light that has reached the inclined surface portion 31a is guided in the direction of the cover 40 (see FIG. 2) and is used as illumination light. A dotted arrow in FIG. 5 is an example of a light path within the thickness of the light source cover 30.

  More specifically, the inclined surface portion 31a is inclined so as to face forward (z-axis positive direction), and light emitted from the inclined surface portion 31a to the outside of the light source cover 30 is directly guided to the direction of the cover 40. be able to.

  In addition, the same effect can be obtained in the inclined surface portion 32 a of the end surface 32 on the outer peripheral side of the light source cover 30. That is, the light emitted from the inclined surface portion 32 a to the outside of the light source cover 30 is directly guided toward the cover 40.

  On the other hand, in the case of the end surface 301 parallel to the light emitting direction of the light emitting module 20, such as the end surface 301 of the light source cover 300 in the comparative example shown in FIG. 6, the end surface 301 passes through the thickness of the light source cover 300. The light that reaches the side is directed to the side. That is, most of the light emitted from the end face 301 is not used as illumination light. A dotted arrow in FIG. 6 is an example of a light path within the thickness of the light source cover 300. 6 shows an optical path when light is incident on the end surface 301 at a relatively small incident angle. However, when the incident angle is relatively large, the optical path is at the interface between the end surface 301 and the atmosphere. It is totally reflected and returns to the thickness of the light source cover 300.

  Thus, in the lighting fixture 1 which concerns on this Embodiment, the end surface 31 (32) of the light source cover 30 has the inclined surface part 31a (32a), Therefore The light which reaches | attains the end surface 31 (32) is received. It can be used effectively as illumination light.

  Here, on the front surface 30a of the light source cover 30 according to the present embodiment, fine irregularities (conceptually indicated by dotted lines in FIG. 7) are formed as shown in FIG. Such fine unevenness is called, for example, a texture and has a function of diffusing light.

  As described above, the texture is formed on the front surface 30 a of the light source cover 30, so that the granularity of light of the plurality of light emitting elements 22 can be suppressed and the thickness of the light source cover 30 can be reduced. Diffuse reflection also occurs. As described above, the light reaching the end surface 31 and the end surface 32 by the diffuse reflection is emitted from the inclined surface portion 31a and the inclined surface portion 32a, and thus is effectively used as illumination light.

  In addition, no wrinkles are formed on the inclined surface portion 31 a, that is, the roughness of the surface of the inclined surface portion 31 a is smaller than the roughness of the front surface 30 a of the light source cover 30. Therefore, for example, diffusion of light when emitted from the inclined surface portion 31a is suppressed, and as a result, it becomes easier to guide light forward.

  In addition, although there is no limitation in particular in the size of the inclined surface part 31a, an inclination angle, etc., as shown in FIG. 7, it is preferable that the length La of the inclined surface part 31a is longer than the length Lb of the edge part 31b. That is, as the proportion of the surface inclined with respect to the light emitting direction of the light emitting module 20 on the end surface 31 increases, the proportion of the light that reaches the end surface 31 that is effectively used as illumination light increases. For example, the length Lb of the end edge portion 31b may be substantially “0”. That is, the entire end surface 31 may be the inclined surface portion 31a. Thereby, the further effective use as the illumination light of the light which reached the end surface 31 is achieved.

[Power supply unit]
The power supply unit 70 is a power supply device for generating power for lighting the light emitting module 20. The power supply unit 70 converts, for example, AC power supplied from an external power source such as a system power supply or a storage battery via a hooking sealing body and an adapter (not shown) into DC power and supplies the DC power to the light emitting module 20.

  Specifically, the power supply unit 70 controls lighting (full lighting) and extinguishing of the light emitting module 20. The power supply unit 70 may perform light adjustment or color adjustment of the light emitting module 20.

  The power supply unit 70 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 70 is configured by housing the circuit board in the housing. Further, the power supply unit 70 is attached to the instrument main body 10 by fixing the housing to the opposite side of the mounting surface 11 of the instrument main body 10 using screws.

[Effects, etc.]
As described above, the lighting fixture 1 according to the present embodiment includes the fixture main body 10, the light emitting module 20 attached to the fixture main body 10 in a posture of emitting light forward, and the fixture main body so as to cover the light emitting module 20. 10 and a light source cover 30 having translucency attached thereto. The end surface 31 (32) of the light source cover 30 has an inclined surface portion 31 a (32 a) that is inclined with respect to the light emission direction of the light emitting module 20.

  According to this configuration, for example, the light that has reached the inclined surface portion 31a via the thickness of the light source cover 30 is directed forward, and thus is used as illumination light. That is, the luminaire 1 according to the present embodiment has a structure for positively using leakage light from the end face of the light source cover, which has not been conventionally considered as illumination light, as illumination light. doing.

  Thus, according to the lighting fixture 1 which concerns on this Embodiment, the light which the light emitting module 20 emits can be taken out efficiently.

  In more detail, in this Embodiment, the inclined surface part 31a (32a) inclines so that it may face the front. Thereby, for example, light emitted from the inclined surface portion 31 a to the outside of the light source cover 30 can be directly guided to the direction of the cover 40. That is, the extraction efficiency of light emitted from the light emitting module 20 can be further improved.

  Moreover, in this Embodiment, the roughness of the front surface 30a which is the surface of the front side of the light source cover 30 is larger than the roughness of the surface of the inclined surface part 31a (32a).

  Specifically, fine irregularities are formed on the front surface 30a of the light source cover 30 by embossing or the like, and the inclined surface portion 31a (32a) is actively processed to improve the surface roughness. Not done. Thereby, light diffuses on the front surface 30a of the light source cover 30, and thereby, the granularity of light (luminance unevenness) of the plurality of light emitting elements 22 is suppressed. Moreover, in the inclined surface part 31a (32a), the spreading | diffusion at the time of light being emitted is suppressed, and this improves the possibility that the emitted light will go forward.

  In the present embodiment, the light emitting module 20 is formed in an annular shape when viewed from the front, and the light source cover 30 has an annular outer shape that covers the light emitting module 20, and is formed on the inner peripheral end surface 31. It has the inclined surface part 31a.

  According to this configuration, for example, the light is emitted from the inclined surface portion 31a of the end surface 31 in a central region that is a relatively dark region (a region in which the amount of emitted light is relatively small) in the annular light emitting module 20. Can be used as illumination light.

  In the present embodiment, the light emitting module 20 is formed in an annular shape when viewed from the front, and the light source cover 30 has an annular outer shape that covers the light emitting module 20 and is inclined to the end face 32 on the outer peripheral side. It has the surface part 32a.

  According to this configuration, for example, light emitted from the inclined surface portion 32a of the end surface 32 can be used as illumination light in a region outside the light emitting module 20 formed in an annular shape.

  In this way, when the inclined light source cover 30 is formed with an inclined surface portion (31a or 32a) on at least one of the inner peripheral end surface 31 and the outer peripheral end surface 32, as viewed from the front. The area of the illumination light emitted from the luminaire 1 is increased.

  In the present embodiment, for example, the end surface 31 of the light source cover 30 further includes an end edge portion 31 b that forms a surface along the thickness direction of the light source cover 30, and is parallel to the thickness direction of the light source cover 30. The length La of the inclined surface portion 31a in the cross section is longer than the length Lb of the end edge portion 31b.

  According to this configuration, for example, the ratio of the surface that is inclined with respect to the light emitting direction of the light emitting module 20 in the end surface 31 is relatively large. The ratio of effective use as light increases.

  Although the lighting fixture 1 according to the embodiment has been described above, the lighting fixture 1 may include the light source cover 30 having a configuration different from the configurations illustrated in FIGS. 1 to 5 and 7. Therefore, in the following, a modified example related to the light source cover 30 according to the embodiment will be described focusing on the difference from the above embodiment.

(Modification 1)
FIG. 8 is a perspective view showing an appearance of the light source cover 130 according to the first modification of the embodiment. A light source cover 130 shown in FIG. 8 is a member that can be attached to the lighting fixture 1 in place of the light source cover 30 according to the above embodiment.

  The light source cover 130 has a plurality of lens portions 135. The plurality of lens portions 135 are provided in one-to-one correspondence with the plurality of light emitting elements 22 included in the light emitting module 20. The lens unit 135 expands the light distribution angle of light from the corresponding light emitting element 22, for example. That is, the lens unit 135 has a function of diverging light. In this manner, by disposing the lens portion 135 corresponding to each light emitting element 22, for example, diffusion of light from each of the plurality of light emitting elements 22 can be precisely controlled.

  The light source cover 130 is formed in an annular shape, the inner peripheral end surface 131 has an inclined surface portion 131a, and the outer peripheral side end surface 132 has an inclined surface portion 132a.

  Thus, even when the light source cover 130 includes a plurality of lens portions 135, the end surface 131 (132) includes the inclined surface portion 131a (132a), so that the light emitted from the light emitting module 20 can be obtained as described above. It can be efficiently extracted as illumination light.

(Modification 2)
FIG. 9 is an enlarged cross-sectional view illustrating a configuration of a light source cover 230 according to Modification 2 of the embodiment. The light source cover 230 shown in FIG. 9 is a member that can be attached to the lighting fixture 1 in place of the light source cover 30 according to the above embodiment.

  The end surface 231 of the light source cover 230 according to this modification includes an inclined surface portion 231a that is inclined with respect to the light emitting direction of the light emitting module 20, and an end edge portion 231b that forms a surface along the thickness direction of the light source cover 230. Have. This configuration is common to the light source cover 30 according to the above embodiment.

  However, as shown in FIG. 9, the inclined surface portion 231 a according to the present modification is inclined not toward the front but toward the rear (negative z-axis direction).

  Even in this case, as indicated by the dotted line arrow in FIG. 9, the light reaching the inclined surface portion 231 a is reflected at the interface between the inclined surface portion 231 a and the atmosphere, and as a result, the light is emitted forward. There is. Therefore, for example, as in the light source cover 300 in the comparative example illustrated in FIG. 6, the end surface 231 (the inclined surface portion 231 a) transmits the illumination light forward compared to the case where the end surface 301 is parallel to the light emission direction of the light emitting module 20. It can be said that the function of emitting light is high.

(Other)
As mentioned above, although the lighting fixture which concerns on this invention was demonstrated based on embodiment, this invention is not limited to said embodiment.

  For example, the light source cover 30 may not have a configuration for actively diffusing light, such as wrinkles. That is, the light source cover 30 may be provided in the lighting fixture 1 as a transparent cover member formed of, for example, resin or glass.

  Further, for example, in the above embodiment, the light emitting module 20 is formed in an annular shape in plan view, but the present invention is not limited to this. For example, the light emitting module 20 may be an annular shape. Moreover, the light emitting module 20 does not need to be annular in a plan view, and may be a long rectangular shape, for example. In any case, since the end surface of the light source cover that covers the light emitting module 20 has the inclined surface portion, as described above, the light that has reached the end surface can be effectively used as illumination light.

  The method of fixing the light source cover 30 to the instrument body 10 is not limited to screwing. For example, the light source cover 30 is hooked on a nail provided on the instrument body 10 so that the light source cover 30 is attached to the instrument body 10. It may be fixed. For example, the light source cover 30 may be fixed to the instrument body 10 with an adhesive. The same applies to the method for fixing the light emitting module 20 to the instrument body 10, and various methods can be employed.

  Further, for example, in the above-described embodiment, an example in which the light emitting module 20 includes an LED has been described, but the present invention is not limited thereto. For example, the light emitting module 20 may include an organic EL (Electro Luminescence) element or a laser element.

  Moreover, for example, in the above-described embodiment, the example in which the lighting fixture 1 is a ceiling light has been described, but the present invention is not limited thereto. For example, the lighting fixture 1 may be a downlight or a pendant light.

  Other configurations and functions in the embodiment or the modification are arbitrarily selected without departing from the gist of the present invention, and forms obtained by making various modifications conceived by those skilled in the art with respect to the embodiment and the modification. Forms realized by combining them are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Appliance main body 20 Light emitting module (light emission part)
22 Light emitting element 30, 130, 230 Light source cover 30a Front surface 31, 32, 131, 132, 231 End surface 31a, 32a, 131a, 132a, 231a Inclined surface portion 31b, 32b, 231b End edge portion

Claims (7)

An instrument body;
A light emitting unit attached to the instrument body in a posture to emit light forward;
A light source cover having translucency attached to the instrument body so as to cover the light emitting part,
The end surface of the light source cover has an inclined surface portion that is inclined with respect to the light emitting direction of the light emitting portion. The lighting apparatus according to claim 1, wherein the inclined surface portion is inclined to face the front. The lighting fixture according to claim 1 or 2, wherein a roughness of a front surface of the light source cover, which is a surface on the front side, is larger than a roughness of a surface of the inclined surface portion. The light emitting portion is formed in an annular shape when viewed from the front,
The lighting device according to any one of claims 1 to 3, wherein the light source cover has an annular outer shape that covers the light emitting portion, and has the inclined surface portion on the end surface on an inner peripheral side. The light emitting portion is formed in an annular shape when viewed from the front,
The lighting apparatus according to claim 1, wherein the light source cover has an annular outer shape that covers the light emitting portion, and the inclined surface portion is provided on the end surface on the outer peripheral side. The end surface of the light source cover further has an edge portion forming a surface along the thickness direction of the light source cover,
The lighting fixture according to any one of claims 1 to 5, wherein a length of the inclined surface portion in a cross section parallel to the thickness direction of the light source cover is longer than a length of the end edge portion. The light emitting unit has a plurality of light emitting elements,
The lighting apparatus according to claim 1, wherein the light source cover includes a lens disposed at a position facing each of the plurality of light emitting elements.

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