JP2017054702A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which achieves simplification of a structure of a body of the luminaire and inhibits influence of deformation caused by temperature change of the body.SOLUTION: A luminaire 1 includes a light source 20, a translucent optical member 40 that covers the light source 20, a main body 10 to which the light source 20 and the optical member 40 are attached, and a translucent cover 50 that covers the light source 20 and the optical member 40. The cover 50 is locked by the optical member 40.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a lighting fixture.

  Conventionally, a translucent cover that covers a light source has been used in lighting fixtures such as kitchen lights and base lights (see, for example, Patent Document 1).

  In the luminaire disclosed in Patent Document 1, a light source made of LED (Light Emitting Diode) is attached to a long aluminum body. Moreover, the resin translucent cover which covers a light source is attached to a main body. The main body is provided with a recess (groove) for locking the cover along the longitudinal direction. By fitting the end of the cover into the recess, the cover is locked to the main body.

JP 2015-26493 A

  However, in the lighting fixture disclosed in Patent Document 1, the structure of the main body is complicated by the concave portions provided along the longitudinal direction of the main body. In addition, when the processing accuracy of the shape and position of the concave portion provided along the longitudinal direction of the main body is low, the cover may not be locked, so the concave portion of the main body needs to be processed with high accuracy. Further, the main body may be deformed by a temperature change accompanying heat generated in the LED. Thereby, since the recessed part of a main body also deform | transforms, a squeaking sound may generate | occur | produce between a recessed part and a cover. Moreover, the relative position of the cover with respect to the recess may be shifted due to deformation of the main body.

  One embodiment of the present invention has been made to solve such a problem, and provides a lighting fixture that can simplify the structure of the main body of the lighting fixture and suppress the influence of deformation due to a temperature change of the main body. The purpose is to do.

  In order to achieve the above object, one aspect of a lighting fixture according to the present invention includes a light source, a translucent optical member that covers the light source, a main body to which the light source and the optical member are attached, the light source, and the light source. A translucent cover that covers the optical member, and the cover is locked by the optical member.

  According to one embodiment of the present invention, it is possible to provide a lighting fixture that can simplify the structure of the main body of the lighting fixture and suppress the influence of deformation associated with a temperature change of the main fixture.

FIG. 1 is a perspective view showing an appearance of the lighting apparatus according to Embodiment 1. FIG. 2 is an exploded perspective view of the lighting apparatus according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view of the lighting fixture according to the first embodiment. 4 is an enlarged view of a main part of a cross section of the lighting apparatus according to Embodiment 1. FIG. FIG. 5 is a perspective view showing the structure of the optical member and the cover in the longitudinal direction according to the first embodiment. FIG. 6 is a perspective view showing an appearance of a lighting fixture according to Embodiment 2. FIG. FIG. 7 is a plan view showing the appearance of the lighting apparatus according to Embodiment 2. FIG. FIG. 8 is a cross-sectional view of the lighting apparatus according to Embodiment 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Accordingly, numerical values, shapes, materials, components, arrangement positions and connection forms of components 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 schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment 1)
[1-1. overall structure]
First, the whole structure of the lighting fixture which concerns on Embodiment 1 is demonstrated using FIGS. 1-3.

  FIG. 1 is a perspective view showing an appearance 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 cross-sectional view of the lighting fixture 1 according to the present embodiment. 3 is a cross-sectional view taken along the line III-III shown in FIG.

  In each figure, the longitudinal direction of the luminaire 1 is the x-axis direction, and two directions orthogonal to the longitudinal direction of the luminaire 1 are the y-axis direction and the z-axis direction. In the present embodiment, the y-axis direction is the vertical direction.

  As FIG. 1 shows, the lighting fixture 1 which concerns on this Embodiment is a elongate lighting fixture. In the present embodiment, the lighting fixture 1 is a multipurpose lamp used in, for example, a kitchen or a storage room.

  The lighting fixture 1 is provided with the main body 10, the light source 20, the optical member 40, the cover 50, and the end cover 60 as FIG.2 and FIG.3 shows. Hereinafter, each component of the lighting fixture 1 is demonstrated.

[1-1-1. Body]
As shown in FIGS. 2 and 3, the main body 10 is a long housing to which the light source 20 and the optical member 40 are attached. The main body 10 has a mounting surface 102 for mounting the light source 20 and the optical member 40 on the negative side in the y-axis direction of FIG.

  As shown in FIG. 2, the main body 10 includes a power output unit 15 and a main switch unit 16. Further, a power supply circuit (not shown) that converts AC power supplied from an external power supply (not shown) into DC power is built in the main body 10. Thus, since heat generating parts such as the light source 20 and the power supply circuit are attached to the main body 10, a metal material such as aluminum having excellent thermal conductivity is used as a material for forming the main body 10.

  The main body 10 is attached to an attachment portion such as a ceiling using a wood screw or the like. As shown in FIG. 2, the main body 10 is formed with insertion holes 18 for inserting wood screws at both ends in the longitudinal direction (x-axis direction). The main body 10 is attached to the attached portion by screwing the wood screw inserted into the insertion hole 18 into the attached portion.

  The power output unit 15 is an outlet that outputs AC power. The power output unit 15 is supplied with AC power input from the outside to the lighting fixture 1.

  The main switch unit 16 is a switch for switching on / off of the lighting fixture 1. If the main switch unit 16 is in the ON state, power is supplied to the light source 20 from a power supply circuit (not shown), and the light source 20 is turned on. If the main switch unit 16 is in the off state, power is not supplied to the power supply circuit, and the light source 20 is turned off.

[1-1-2. light source]
The light source 20 is a light emitting unit that emits illumination light of the lighting fixture 1. In the present embodiment, the light source 20 includes a substrate 22, a plurality of light emitting elements 24, and a pair of connection terminals 23, as shown in FIG. The light source 20 is attached to the attachment surface 102 of the main body 10 using screws 30.

  The substrate 22 is a rectangular substrate in which a plurality of light emitting elements 24 are arranged on one main surface. The substrate 22 is a resin substrate based on a resin. As the resin substrate, for example, a glass epoxy substrate made of glass fiber and epoxy resin, a substrate made of paper phenol or paper epoxy, or the like can be used. A ceramic substrate or the like may be used as the substrate 22.

  The light emitting element 24 is a light emitting unit of the light source 20. In the present embodiment, the light emitting element 24 is disposed on one main surface of the substrate 22. As shown in FIG. 5, in the present embodiment, the plurality of light emitting elements 24 are straight along the longitudinal direction (x-axis direction) of the substrate 22 at the approximate center in the width direction (z-axis direction) of the substrate 22. However, the layout of the plurality of light emitting elements 24 is not limited to this. For example, the plurality of light emitting elements 24 may be mounted in two rows.

  Each light emitting element 24 according to the present embodiment is a so-called surface mount device (SMD) type light emitting element in which an LED chip and a phosphor are packaged. Each light emitting element 24 according to the present embodiment is a white LED that emits white light. Note that the emission color of the light emitting element 24 is not limited to white. For example, a light bulb color may be used.

  Although not shown, the light emitting element 24 has two electrode terminals of a positive electrode and a negative electrode, and these electrode terminals and the side on which the light emitting element 24 of the substrate 22 is disposed (the negative side in the y-axis direction). Metal wiring (metal pattern) patterned on the main surface is electrically connected. That is, the metal wiring is electrically connected to the light emitting element 24.

  The pair of connection terminals 23 are terminals that receive supply of power for causing the light emitting element 24 to emit light from the outside of the light source 20. A power supply line (not shown) that supplies power to the light emitting element 24 is connected to each of the pair of connection terminals 23. The pair of connection terminals 23 and the metal wiring formed on the main surface of the substrate 22 are electrically connected.

[1-1-3. Optical member]
The optical member 40 is a translucent optical member that covers the light source 20. The optical member 40 can be formed using a translucent material. For example, the optical member 40 can be formed using a resin material such as acrylic or polycarbonate, or a glass material. The optical member 40 is preferably made of an insulating material such as a resin material. Thereby, the insulation performance between the light source 20 and the outside can be improved.

  In the present embodiment, the optical member 40 is a light diffusing member. In order to provide the light diffusing function in the optical member 40, for example, the optical member 40 may be molded using a resin material in which a light diffusing material (fine particles) such as silica or calcium carbonate is dispersed. Alternatively, a light diffusion sheet or a light diffusion film may be formed on the inner surface or the outer surface of the optical member 40. Specifically, a milky white light diffusion film can be formed by attaching a resin or a white pigment containing a light diffusing material to the inner surface or the outer surface of the optical member 40.

  In addition, by providing a lens structure provided inside or outside of the optical member 40, or a concave or convex portion formed on the optical member 40, the optical member 40 can have a light diffusion function. For example, a dot pattern can be printed on the inner surface or the outer surface of the optical member 40 or a part of the optical member 40 can be processed.

  Thus, by providing the optical member 40 with a light diffusion function, the light emitted from the light emitting element 24 can be diffused when passing through the optical member 40. In particular, when the light emitting elements 24 are spaced apart as in the present embodiment, a light graininess (brightness variation) may occur. However, by providing the optical member 40 with a light diffusing function, A feeling can be suppressed.

  As shown in FIG. 3, the optical member 40 is a long member having a substantially semicircular cross section. The optical member 40 includes fixed portions 42 that protrude in the z-axis direction at both ends in the longitudinal direction (x-axis direction). As shown in FIG. 2, the fixing portion 42 has a through hole. By inserting the screw 32 into the through hole and screwing it into the screw hole formed in the mounting surface 102 of the main body 10, The optical member 40 is attached to the main body 10. In addition, the optical member 40 may be provided with the fixing | fixed part 44 other than the both ends of a longitudinal direction, as FIG. 2 shows. In the present embodiment, as shown in FIG. 3, the fixing portion 44 includes a locking claw 442, and the locking claw 442 is locked in the locking hole 12 formed in the mounting surface 102. The locking hole 12 includes a main body protruding portion 13, and the locking claw 442 is locked to the main body protruding portion 13 by a snap method. Thereby, the fixing | fixed part 44 is latched to the main body 10 stably and easily.

  The optical member 40 has a configuration for locking the cover 50. This configuration will be described later.

  The optical member 40 may include a phosphor, for example. Thereby, the wavelength of the illumination light emitted from the light emitting element 24 can be converted, and illumination light having a desired wavelength distribution can be irradiated.

[1-1-4. cover]
The cover 50 is a translucent cover that covers the light source 20 and the optical member 40. As shown in FIGS. 2 and 3, the cover 50 is a long member having a substantially U-shaped cross section.

  As a material for forming the cover 50, for example, a material similar to that of the optical member 40 can be used.

  In addition, in order to diffuse the light from the light emitting element 24, the cover 50 may have a light diffusion function. The configuration for providing the light diffusion function is the same as that of the optical member 40.

  The cover 50 is locked by the optical member 40. The locking configuration will be described later.

[1-1-5. End cover]
The end cover 60 is a member that covers an end portion of the main body 10 in the longitudinal direction (x-axis direction). As a material for forming the end cover 60, for example, a material similar to that of the cover 50 can be used.

  The end cover 60 is locked by the main body 10. The locking configuration of the end cover 60 is not particularly limited. The end cover 60 may be fixed to the main body 10 with, for example, screws.

[1-2. Cover locking configuration]
Next, the locking configuration of the cover 50 according to the present embodiment will be described.

[1-2-1. Locking configuration in the direction perpendicular to the longitudinal direction]
First, a locking configuration in a direction perpendicular to the longitudinal direction of the cover 50 will be described with reference to FIG.

  FIG. 4 is an enlarged view of a main part of a cross section of the lighting fixture 1 according to the present embodiment. In FIG. 4, the broken-line frame part of FIG. 3 is shown enlarged.

  As shown in FIG. 4, the cover 50 includes a main body side end 52 at a position facing the main body 10. The body-side end portion 52 is provided with a locked portion 521. The locked portion 521 is a protruding portion that protrudes inwardly (in other words, on the optical member 40 side) at the main body side end portion 52 of the cover 50.

  As shown in FIG. 4, the optical member 40 includes a locking portion 444 at the end of the fixed portion 44 in the z-axis direction. The locking portion 444 is a protruding portion that is provided at the end of the optical member 40 in the z-axis direction and protrudes toward the cover 50.

  In the present embodiment, as shown in FIG. 4, the locked portion 521 of the cover 50 is disposed between the locking portion 444 of the optical member 40 and the main body 10. That is, the locked portion 521 of the cover 50 is sandwiched between the locking portion 444 of the optical member 40 and the main body 10. Thereby, the movement of the locked portion 521 of the cover 50 in the y-axis direction (vertical direction) in FIG. 4 is restricted. Thus, the locked portion 521 of the cover 50 is locked in the y-axis direction by the locking portion 444 of the optical member 40.

  Similarly, the cover 50 and the optical member 40 also include a locked portion 521 and a locking portion 444 at the end on the positive side in the z-axis direction in FIG. For this reason, the movement of the cover 50 is restricted by the optical member 40 also in the z-axis direction of FIG. Thus, the cover 50 is locked in the z-axis direction by the optical member 40.

  As described above, in the lighting fixture 1 according to the present embodiment, the lighting fixture 1 is locked in the y-axis direction and the z-axis direction, that is, in the direction perpendicular to the longitudinal direction of the cover 50 (x-axis direction).

  In the present embodiment, the locked portion 521 is disposed between the locking portion 444 and the main body 10. Accordingly, the locked portion 521 can be locked by disposing the locked portion 521 between the locking portion 444 and the main body 10 by, for example, a snap method. That is, the locked portion 521 can be easily locked.

  As shown in FIG. 4, the main body 10 includes a convex portion 11 that protrudes toward the cover 50 at a position facing the main body side end portion 52 of the cover 50. The convex portion 11 of the main body 10 is provided along the longitudinal direction (x-axis direction) of the main body 10. On the other hand, the main body side end portion 52 of the cover 50 includes a concave portion 522 in which the convex portion 11 is fitted. The convex portion 11 and the concave portion 522 are configured to prevent insects from entering the cover 50. The main body 10 and the cover 50 are formed so that the gap between the convex portion 11 and the concave portion 522 is sufficiently narrow. The gap is about 0.3 mm or less, for example. Thereby, even if the cover 10 is not locked by the main body 10 as in the present embodiment, insects can be sufficiently prevented from entering the cover 50.

  Although not shown, the optical member 40 includes a locking portion on the fixing portion 42 at both ends in the longitudinal direction as well as the fixing portion 44, and locks the locked portion 521 of the cover 50. That is, in this embodiment, the optical member 40 locks the locked portion 521 of the cover 50 at three positions in the longitudinal direction. Thereby, the cover 50 is stably locked by the optical member 40. Thus, in this Embodiment, since the structure for latching the cover 50 in the main body 10 is not provided, the structure of the main body 10 can be simplified. Further, in the present embodiment, the cover 50 is locked at only three positions in the longitudinal direction by the optical member 40, so that the influence on the cover 50 due to deformation accompanying the temperature change of the main body 10 is suppressed. .

[1-2-2. Locking configuration in the longitudinal direction]
Next, the latching structure in the longitudinal direction of the cover 50 will be described with reference to FIG.

  FIG. 5 is a perspective view showing the structure of the end portions in the longitudinal direction of the optical member 40 and the cover 50 according to the present embodiment. In FIG. 5, the luminaire 1 with the end cover 60 removed is shown.

  The cover 50 according to the present embodiment has an elongated shape as shown in FIG. As shown in FIG. 5, the optical member 40 includes a regulating portion 422 that regulates the position of the long cover 50 in the longitudinal direction. The restricting portion 422 restricts the movement of the locked portion 521 of the cover 50 in the longitudinal direction. The optical member 40 includes a restricting portion 422 not only at the end on the x-axis direction positive side shown in FIG. 5 but also at the end on the x-axis direction negative side. Thereby, the optical member 40 restricts the movement of the cover 50 in the longitudinal direction. As described above, the restricting portion 422 of the optical member 40 restricts the position of the cover 50 in the longitudinal direction. That is, the restriction portion 422 of the optical member 40 locks the cover 50 in the longitudinal direction. Thereby, it can suppress that the cover 50 detaches | leaves from the lighting fixture 1. FIG.

[1-3. Summary]
As described above, the lighting fixture 1 according to the present embodiment includes the light source 20, the translucent optical member 40 covering the light source 20, the main body 10 to which the light source 20 and the optical member 40 are attached, the light source 20, and the optical. And a translucent cover 50 covering the member 40. The cover 50 is locked by the optical member 40.

  Thereby, since the structure for latching the cover 50 on the main body 10 is not provided, the structure of the main body 10 can be simplified. In the present embodiment, since the cover 50 is locked by the optical member 40, the influence of the cover 50 due to the deformation accompanying the temperature change of the main body 10 can be suppressed.

  Further, in the lighting apparatus 1, the cover 50 includes a locked portion 521, the optical member 40 includes a locking portion 444 that locks the locked portion 521, and the locked portion 521 includes the locking portion. 444 and the main body 10 may be disposed.

  Accordingly, the locked portion 521 can be locked by disposing the locked portion 521 between the locking portion 444 and the main body 10 by, for example, a snap method. That is, the operation of locking the cover 50 to the optical member 40 can be simplified.

  Further, in the lighting fixture 1, the main body 10 includes a convex portion 11 protruding toward the cover 50 at a position facing the main body side end portion 52 of the cover 50, and the main body side end portion 52 is fitted with the convex portion 11. A recessed portion 522 may be provided.

  Thereby, even if the cover 50 is not locked by the main body 10 as in the present embodiment, insects can be prevented from entering the cover 50 from the gap between the main body 10 and the cover 50.

  In the lighting fixture 1, the cover 50 may have a long shape, and the optical member 40 may include a restriction portion 422 that restricts the position of the cover 50 in the longitudinal direction.

  Thereby, it can suppress that the cover 50 leaves | separates in the longitudinal direction of the lighting fixture 1. FIG.

  Moreover, in the lighting fixture 1, the optical member 40 may be a light diffusing member.

  Thereby, the light emitted from the light emitting element 24 can be diffused when passing through the optical member 40. In particular, when the light emitting elements 24 of the light source 20 are spaced apart as in the present embodiment, a light graininess (brightness variation) may occur, but the optical member 40 should have a light diffusion function. Thus, the graininess can be suppressed.

  Moreover, in the lighting fixture 1, the optical member 40 may include a phosphor.

  Thereby, the wavelength of the illumination light emitted from the light emitting element 24 of the light source 20 can be converted, and the illumination light having a desired wavelength distribution can be irradiated.

(Embodiment 2)
Next, the lighting fixture which concerns on Embodiment 2 is demonstrated. Although the lighting fixture 1 which concerns on Embodiment 1 had an elongate shape, the lighting fixture which concerns on this Embodiment has a substantially cylindrical shape. Hereinafter, the lighting fixture according to the present embodiment will be described focusing on differences from the lighting fixture 1 according to the first embodiment.

[2-1. overall structure]
First, the whole structure of the lighting fixture which concerns on this Embodiment is demonstrated using FIGS.

  FIG. 6 is a perspective view showing an appearance of the lighting fixture 1a according to the present embodiment.

  FIG. 7 is a plan view showing the appearance of the lighting fixture 1a according to the present embodiment.

  FIG. 8 is a cross-sectional view of the lighting fixture 1a according to the present embodiment. 8 is a cross-sectional view taken along the line VIII-VIII shown in FIG.

  As shown in FIGS. 6 and 7, the lighting fixture 1a has a substantially cylindrical shape. In the present embodiment, the lighting fixture 1a is a ceiling light.

  As shown in FIG. 7, the lighting fixture 1a includes a plurality of light sources 20a and 21, an optical member 40a, and a cover 50a. Moreover, as FIG. 8 shows, the lighting fixture 1a is provided with the main body 10a.

  The main body 10a is a housing to which the light sources 20a and 21 and the optical member 40a are attached. In the present embodiment, the main body 10a has a substantially circular shape when viewed from the cover 50a side.

  The light sources 20a and 21 are light emitting units that emit illumination light from the lighting fixture 1a. In the present embodiment, the light source 21 is not covered with the optical member 40a. The light source 21 may be covered with an optical member.

  As shown in FIG. 8, the light source 20a includes a substrate 22a and a light emitting element 24a. Although not shown, the light source 20a includes a connection terminal in the same manner as the light source 20 according to the first embodiment. The light source 20a is attached to the attachment surface 102a of the main body 10a using a screw 30a. In the present embodiment, the substrate 22a is circular, for example. The substrate 22a may be shared by a plurality of light sources 20a. For example, an annular substrate disposed along the circular periphery of the main body 10a may be used as the substrate 22a. Other configurations of the light source 20a are the same as those of the light source 20 according to the first embodiment.

  The light source 21 has the same configuration as the light source 20a.

  The optical member 40a is a translucent optical member that covers the light source 20a. The optical member 40a is different from the optical member 40 according to the first embodiment in its shape. The optical member 40a has a substantially hemispherical shape. The optical member 40a includes two fixing portions 44a. The fixing portion 44a includes a locking claw 442a, and the locking claw 442a is locked in a locking hole 12a formed in the mounting surface 102a. The locking hole 12a includes a main body protruding portion 13a, and the locking claw 442a is locked to the main body protruding portion 13a by a snap method. Thereby, the fixing | fixed part 44a is latched to the main body 10a stably and easily.

  The cover 50a is a translucent cover that covers the light sources 20a and 21 and the optical member 40a. As shown in FIGS. 6 to 8, the cover 50a is a bottomed cylindrical member.

[2-2. Cover locking configuration]
Next, the locking configuration of the cover 50a according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 8, the cover 50a includes a main body side end 52a at a position facing the main body 10a, like the cover 50 according to the first embodiment. A locked portion 521a is provided at the main body side end portion 52a. In the present embodiment, the main body side end 52a has a substantially annular shape along the substantially circular periphery of the main body 10a. Further, the locked portion 521a provided at the main body side end 52a is disposed at a position along the substantially circular periphery of the main body 10a.

  As shown in FIG. 8, the optical member 40a includes a locking portion 444a at the end on the negative side in the z-axis direction of the fixed portion 44a, like the optical member 40 according to the first embodiment.

  In the present embodiment, as shown in FIG. 7, a plurality of optical members 40a are arranged along the periphery of the cover 50a. Each of the plurality of optical members 40a includes a locking portion 444a. As a result, an annular locked portion 521a provided on the periphery of the cover 50a is locked to the plurality of locking portions 444a. Thus, the cover 50a according to the present embodiment is locked by the optical member 40a.

  Thereby, also in this Embodiment, since the structure for latching the cover 50a to the main body 10a is not provided, the structure of the main body 10a can be simplified. In the present embodiment, since the cover 50a is locked only at the position where the plurality of optical members 40a are disposed, the influence of the cover 50a due to the deformation accompanying the temperature change of the main body 10a is suppressed.

  Also in the present embodiment, there is provided a configuration that suppresses the entry of insects into the cover 50a. As shown in FIG. 8, the main body 10a includes a convex portion 11a that protrudes toward the cover 50a at a position facing the main body side end 52a of the cover 50a. The convex portion 11a of the main body 10a is provided in a substantially annular shape along the periphery of the main body 10a. On the other hand, the main body side end portion 52a of the cover 50a includes a concave portion 522a into which the convex portion 11a is fitted. The main body 10a and the cover 50a are formed so that the gap between the convex portion 11a and the concave portion 522a is sufficiently narrow. The gap is about 0.3 mm or less, for example. Thereby, even in the configuration in which the cover 50a is not locked by the main body 10a as in the present embodiment, insects can be sufficiently prevented from entering the cover 50a.

  In the present embodiment, eight optical members 40a are provided, but it is sufficient if there are a plurality of optical members 40a. The plurality of optical members 40a are preferably arranged at equal intervals along the locked portion 521a.

  In the present embodiment, the optical member 40a may include a phosphor. Thereby, the illumination light which has mutually different wavelength distribution from the light source 20a covered with the optical member 40a and the light source 21 which is not covered with the optical member 40a can be obtained.

  Moreover, in this Embodiment, as the to-be-latched part 521a, an internal thread may be formed inside the peripheral part of the cover 50a, and the thread corresponding to the said internal thread may be formed in the some engaging part 444a. Thereby, the cover 50a can be screwed into the optical member 40a. By adopting such a locking configuration, the cover 50a can be locked to the optical member 40a more stably.

[2-3. Summary]
As described above, in the lighting fixture 1a according to the present embodiment, the main body 10a has a substantially circular shape when viewed from the cover 50a side, and the locked portion 521a has a substantially circular peripheral edge of the main body 10a. It is arranged at a position along.

  Thereby, also in the substantially cylindrical lighting fixture 1a, the structure of the main body 10a can be simplified and the influence which the cover 50a with the deformation | transformation accompanying the temperature change of the main body 10 receives can be suppressed.

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

  For example, although the SMD type light emitting element is used in the light source 20 according to the above embodiment, the light emitting element used in the light source 20 is not limited to this. For example, an LED module having a COB (Chip On Board) structure may be used.

  In the above embodiment, the LED is exemplified as the light emitting element. However, as the light emitting element, a semiconductor light emitting element such as a semiconductor laser or other solid light emitting element such as an organic EL (Electro Luminescence) or an inorganic EL is used. May be.

  In addition, the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 1, 1a Lighting fixture 10, 10a Main body 11, 11a Convex part 20, 20a, 21 Light source 40, 40a Optical member 50, 50a Cover 52, 52a Main body side edge part 422 Restriction part 444, 444a Locking part 521, 521a Engagement Stop part 522, 522a Concave part

Claims (7)

A light source;
A translucent optical member covering the light source;
A main body to which the light source and the optical member are attached;
A translucent cover that covers the light source and the optical member;
The said cover is a lighting fixture latched by the said optical member. The cover includes a locked portion,
The optical member includes a locking portion that locks the locked portion,
The lighting fixture according to claim 1, wherein the locked portion is disposed between the locking portion and the main body. The main body includes a convex portion protruding toward the cover at a position facing the main body side end of the cover,
The lighting device according to claim 1, wherein the main body side end portion includes a concave portion into which the convex portion is fitted. The cover has an elongated shape,
The lighting apparatus according to claim 1, wherein the optical member includes a restricting portion that restricts a position in a longitudinal direction of the cover. The main body has a substantially circular shape when viewed from the cover side,
The lighting fixture according to claim 2, wherein the locked portion is disposed at a position along a substantially circular peripheral edge of the main body. The lighting apparatus according to claim 1, wherein the optical member is a light diffusing member. The lighting apparatus according to claim 1, wherein the optical member includes a phosphor.

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