JP2019036389A - Lighting apparatus - Google Patents

Abstract

To provide a lighting apparatus which can be easily installed.SOLUTION: A lighting apparatus 10 includes: a light-emitting device 31; an electric power unit 50 which supplies electric power to the light-emitting device 31; a light guide plate 32 which has a side face 32a and a first main face 32b facing toward the electric power unit 50, and emits, from the first main face 32b, light coming from the light-emitting device 31 into the side face 32a; an apparatus body 40 supporting the light-emitting device 31, the light guide plate 32, and the electric power unit 50; and a cover 20 covering the electric power unit 50.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a luminaire including a light emitting element such as an LED (Light Emitting Diode).

  In recent years, lighting fixtures using LEDs have rapidly spread. As an example of such a lighting fixture, Patent Literature 1 discloses a cove illumination having a light guide plate that guides light from an LED.

JP 2013-222704 A

  By the way, it is desirable that the lighting apparatus can be easily installed. For example, electrical work when installing a lighting fixture should be simple.

  The present invention provides a lighting fixture that is easy to install.

  The lighting fixture according to an aspect of the present invention includes a light source, a power supply device that supplies power to the light source, a side surface, and a first main surface facing the power supply device, and the light source that is incident on the side surface. A light guide plate that emits light from a light source from the first main surface, an instrument body that supports the light source, the light guide plate, and the power supply device, and a cover that covers the power supply device.

  The luminaire of the present invention is easy to install.

FIG. 1 is a first external perspective view of a lighting fixture according to an embodiment. FIG. 2 is a second external perspective view of the lighting fixture according to the embodiment. Drawing 3A is a figure showing the example of the 1st installation of the lighting fixture concerning an embodiment. FIG. 3B is a diagram illustrating a second installation example of the lighting fixture according to the embodiment. FIG. 3C is a diagram illustrating a third installation example of the lighting fixture according to the embodiment. FIG. 4 is an exploded perspective view of the lighting fixture according to the embodiment. FIG. 5 is an exploded perspective view of the light guide plate unit provided in the lighting apparatus according to the embodiment. FIG. 6 is a schematic cross-sectional view of the lighting device according to the embodiment cut along a plane perpendicular to the longitudinal direction. FIG. 7 is a schematic cross-sectional view showing a first modification of the shape of the cover. FIG. 8 is a schematic cross-sectional view showing a second modification of the shape of the cover.

  Hereinafter, embodiments will be described with reference to the drawings. Each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to substantially the same structure, and the overlapping description may be abbreviate | omitted or simplified. In the following embodiments, the expression “almost” also includes a manufacturing error, a dimensional tolerance, and the like.

  In the drawings used for explanation in the following embodiments, coordinate axes may be shown. The Z-axis direction is described as the height direction of the lighting fixture. The Z-axis + side may be expressed as an upper side (upper), and the Z-axis-side may be expressed as a lower side (lower). The X-axis direction and the Y-axis direction are directions perpendicular to each other on a plane perpendicular to the Z-axis direction. The Y-axis direction is described as the longitudinal direction of the lighting fixture. The X-axis direction is described as the short direction (width direction) of the lighting fixture. In the following embodiments, the plan view means viewing from the Z-axis direction (viewing from a direction perpendicular to the main surface of the substrate).

(Embodiment 1)
[Overall configuration of lighting equipment]
First, the schematic structure of the lighting fixture which concerns on embodiment is demonstrated using FIGS. 1-3C. FIG.1 and FIG.2 is an external appearance perspective view of the lighting fixture which concerns on embodiment. 3A to 3C are diagrams illustrating an installation example of the lighting fixture according to the embodiment.

  The lighting fixture 10 which concerns on embodiment shown by FIGS. 1-3C is a long-shaped lighting fixture, for example, is installed in a house and is used as indirect lighting, such as a cove lighting or a cornice lighting. That is, the lighting fixture 10 is an indirect lighting fixture. The fixture body 40 included in the lighting fixture 10 includes a base portion 41, a first wall portion 42, and a second wall portion 43. The height of the 1st wall part 42 is higher than the height of the 2nd wall part 43, and the 1st wall part 42 covers and hides the light-guide plate 32 from the outside. In general indirect lighting, a member corresponding to the first wall portion 42 is realized by making a structure (for example, a construction material) on which the lighting fixture is installed. On the other hand, the luminaire 10 has an advantage that such an operation is not necessary because the luminaire main body 40 has the first wall portion 42.

  As shown in FIG. 2, an attachment member 80 is provided on the base portion 41 of the instrument body 40. The luminaire 10 is attached to the structure by a rod-like member that is inserted through the insertion hole of the attachment member 80. The rod-shaped member is, for example, a bolt or a screw. As shown in FIG. 3A, the lighting fixture 10 is attached to the ceiling 101, for example, with the base portion 41 facing the ceiling 101 of the house and the second wall portion 43 facing the wall 102 of the house. . In this case, the lighting fixture 10 mainly illuminates the wall 102 with the light emitted from the light guide plate 32.

  In addition, as illustrated in FIG. 3B, the luminaire 10 may be placed on a construction material 103 protruding from a wall 102 such as a house. In the installation example of FIG. 3B, the lighting fixture 10 is attached to the construction material 103 with the base portion 41 facing the construction material 103 and the second wall portion 43 facing the wall 102. The lighting fixture 10 mainly illuminates the wall 102 with light emitted from the light guide plate 32.

  Moreover, as FIG. 3C shows, the lighting fixture 10 may be attached to walls 102, such as a house. In the installation example of FIG. 3C, the lighting fixture 10 is attached to the wall 102 with the base portion 41 facing the wall 102 and the second wall portion 43 facing the ceiling 101. In this case, the luminaire 10 mainly illuminates the ceiling 101 with light emitted from the light guide plate 32.

  Next, a detailed configuration of the lighting fixture 10 will be described with reference to FIGS. 4 to 6 in addition to FIGS. 1 to 3C. FIG. 4 is an exploded perspective view of the lighting fixture 10. FIG. 5 is an exploded perspective view of the light guide plate unit provided in the lighting fixture 10. FIG. 6 is a schematic cross-sectional view of the lighting fixture 10 when cut along a plane perpendicular to the longitudinal direction.

  As shown in FIGS. 1 to 6, the lighting fixture 10 mainly includes a light guide plate unit 30, a fixture body 40, a power supply device 50, a terminal block 60, a cover 20, and an end cover 70. The instrument body 40 constitutes a housing 25 that houses a part of the light guide plate unit 30 and the power supply device 50. Hereinafter, each component of the lighting fixture 10 is demonstrated.

[Light guide plate unit]
First, the light guide plate unit 30 will be described. The light guide plate unit 30 is an edge light type light guide plate unit. Specifically, the light guide plate unit 30 includes a light emitting device 31, a light guide plate 32, a holding member 33, a second engagement portion 34, and an engagement portion cover 35.

  The light emitting device 31 is an example of a light source. The light emitting device 31 is a light emitting module having an SMD (Surface Mount Device) structure, and includes an SMD type light emitting element (LED element 31b) as described later. The light emitting device 31 includes a substrate 31a and a plurality of LED elements 31b. Note that the light emitting device 31 may include at least one LED element 31b.

  The substrate 31a is a long flat plate whose longitudinal direction is the Y-axis direction. The planar view shape of the substrate 31a is rectangular, but may be other shapes. The substrate 31a is, for example, a CEM-3 (Composite Epoxy Material-3) substrate based on a resin material, but may be other resin substrates, or a metal base substrate or ceramic based on a metal material. It may be a ceramic substrate based on the material. Examples of other resin substrates include FR-4 (Frame Regentant-4) substrates. Examples of the ceramic substrate include an alumina substrate made of aluminum oxide (alumina) and an aluminum nitride substrate made of aluminum nitride. Further, examples of the metal base substrate include an aluminum alloy substrate, an iron alloy substrate, and a copper alloy substrate.

  The substrate 31a is not limited to a rigid substrate. The substrate 31a may be a flexible substrate whose base material is polyimide or the like.

  The LED element 31b is an SMD type light emitting element and emits white light. The LED element 31b includes a package having a recess, an LED chip mounted on the bottom surface of the recess of the package, and a sealing member that fills the recess of the package and seals the LED chip. The LED chip is, for example, a blue LED chip that emits blue light, and the sealing member is, for example, a silicone resin containing yttrium, aluminum, garnet (YAG) -based yellow phosphor particles as a wavelength conversion material. The LED element 31b has a metal terminal for mounting the LED element 31b on the substrate 31a.

  The plurality of LED elements 31b are arranged on the substrate 31a and emit light using electric power supplied from the power supply device 50. Specifically, the plurality of LED elements 31b are arranged in a straight line along the longitudinal direction of the substrate 31a to constitute a light emitting element array. In plan view, the light emitting element array is located at the end of the substrate 31a on the X-axis side. The plurality of LED elements 31b are arranged at regular intervals, for example. The plurality of LED elements 31 b emit light mainly toward the side surface 32 a of the light guide plate 32.

  The plurality of LED elements 31b are connected in series by a wiring pattern included in the wiring layer of the substrate 31a. In addition, the electrical connection mode (a series connection, a parallel connection, connection of the combination of a series connection and a parallel connection, etc.) of the some LED element 31b is not specifically limited.

  The light guide plate 32 is a long optical member whose longitudinal direction is the Y-axis direction. The shape of the light guide plate 32 viewed from the X-axis direction is a rectangular shape, but may be other shapes. The light guide plate 32 is formed of a translucent material (for example, a transparent material). The light guide plate 32 is formed of, for example, an acrylic resin, but may be formed of polycarbonate or glass.

  The light guide plate 32 has a side surface 32a, a first main surface 32b, and a second main surface 32c opposite to the first main surface 32b, and at least the light from the light emitting device 31 incident on the side surface 32a is the first main surface. The light exits from the surface 32b.

  The side surface 32a is an incident surface on which light emitted from the light emitting device 31 is incident, and is disposed to face the light emitting device 31 (a plurality of LED elements 31b). In addition, it is not essential that the side surface 32a is opposed to the light emitting device 31. For example, the light emitted from the light emitting device 31 may be incident on the side surface 32a via another light guide member facing the side surface 32a such as an optical fiber.

  The first main surface 32 b is a light emitting surface that faces the power supply device 50. At least a part of the first main surface 32b is not covered by the cover 20 and the fixture body 40 and is exposed to the outside of the lighting fixture 10. The second main surface 32c is a main surface facing away from the first main surface 32b. The second main surface 32 c faces the first wall portion 42 of the instrument body 40 and is entirely covered by the first wall portion 42. At least one of the first main surface 32b and the second main surface 32c is provided with a reflection structure for reflecting the light incident on the side surface 32a toward the first main surface 32b. Due to such a reflection structure, the first main surface 32b of the light guide plate 32 emits light. The reflection structure is, for example, a fine prism, but may be another structure.

  The holding member 33 is a long member whose longitudinal direction is the Y-axis direction, and is placed on the base portion 41 of the instrument main body 40. The holding member 33 holds the light emitting device 31 and the light guide plate 32. The holding member 33 is formed in a substantially cylindrical shape having a gap into which the light guide plate 32 is inserted, for example, by bending a metal plate such as a steel plate. The light emitting device 31 is disposed inside the holding member 33 and is screwed to the holding member 33. The light guide plate 32 is inserted into the gap of the holding member 33 and screwed to the holding member 33. The holding member 33 may be formed by a combination of a plurality of sheet metals. The holding member 33 is screwed to the base part 41 of the instrument body 40, for example.

  The second engaging portion 34 is a member for locking the cover 20 to the instrument main body 40 and is attached to the holding member 33. The second engaging portion 34 engages with the second engaged portion 24 included in the cover 20. Specifically, the second engaging portion 34 includes, for example, a convex portion protruding toward the X axis − side and engages with a convex portion protruding toward the X axis + side included in the second engaged portion 24. .

  The second engagement portion 34 is a leaf spring formed by bending a metal plate such as a steel plate, for example, and is screwed to the holding member 33. When the second engaging portion 34 and the second engaged portion 24 are engaged, the elasticity of the second engaging portion 34 is used, so that the second engaging portion 34 is more than the holding member 33. Also, it is good to have high elasticity. In this case, the second engagement portion 34 may be formed of a sheet metal that is thinner than the sheet metal that forms the holding member 33, or may be formed of a material that is more elastic than the material that forms the holding member 33. The lighting fixture 10 includes two second engaging portions 34 arranged along the longitudinal direction of the holding member 33, but it is sufficient that at least one second engaging portion 34 is provided.

  The engagement portion cover 35 is a cover that covers the second engagement portion 34. The engagement portion cover 35 is formed, for example, by bending a sheet metal such as a steel plate and is screwed to the holding member 33.

  When installing the luminaire 10, the cover 20 is attached after a portion of the luminaire 10 other than the cover 20 is fixed to the structure. In a state where parts other than the cover 20 are fixed to the structure, it is difficult for the operator to see the position of the second engaging portion 34, and the cover 20 may be inserted at an inappropriate position. According to the engagement portion cover 35, it is possible to prevent the second engagement portion 34 from being deformed when the cover 20 is inserted at an inappropriate position. Moreover, according to the cover 35 for engaging parts, the operator can also give the touch that the cover 20 was inserted in the appropriate position.

  The packing 36 is a seal member that closes a gap between the first main surface 32 b and the holding member 33. The packing 36 is formed of, for example, a resin material such as an elastomer.

[Equipment body]
The instrument main body 40 supports the light guide plate unit 30 and the power supply device 50. More specifically, the instrument body 40 supports the light emitting device 31 and the light guide plate 32 via the holding member 33. The fixture body 40 constitutes the housing 25 of the lighting fixture 10 together with the cover 20. The instrument main body 40 has a long shape with the Y-axis direction as the longitudinal direction, and the cross-sectional shape when cut along a plane perpendicular to the Y-axis is a substantially square bracket shape.

  The instrument body 40 is produced by, for example, extrusion molding of a metal material such as aluminum. Therefore, the cross-sectional shape obtained by cutting the instrument main body 40 along a plane perpendicular to the Y-axis direction is substantially the same regardless of the cutting position. In addition, the instrument main body 40 may be produced by a construction method other than extrusion molding. Moreover, it is not essential that the instrument main body 40 is formed of a metal material, and it may be formed of a resin material. More specifically, the instrument body 40 includes a base portion 41, a first wall portion 42, a second wall portion 43, a first engaging portion 44, and a position restricting portion 45.

  The base portion 41 is a substantially rectangular plate-like portion on which the light guide plate unit 30 and the power supply device 50 are placed in the instrument main body 40. The light guide plate unit 30 is disposed in a region on the X axis − side of the inner surface of the base portion 41, and the power supply device 50 is disposed in a region on the X axis + side of the inner surface of the base portion 41. Each of the light guide plate unit 30 and the power supply device 50 is screwed to the base portion 41, for example.

  On the outer surface of the base portion 41, a first rib 41a, a second rib 41b, and a third rib 41c, which are each long along the Y-axis direction of the lighting fixture 10, are disposed. The first rib 41a is disposed at the end on the X axis − side of the outer surface of the base portion 41, the second rib 41b is disposed at the end of the outer surface of the base portion 41 on the X axis + side, and the third rib 41c. Is arranged between the first rib 41a and the second rib 41b in the X-axis direction. In plan view, the light emitting device 31 and the light guide plate 32 are located between the first rib 41a and the third rib 41c, and the power supply device 50 is located between the second rib 41b and the third rib 41c.

  In a state where the lighting fixture 10 is installed in the structure, the first rib 41a, the second rib 41b, and the third rib 41c basically come into contact with the structure. In addition, the 1st rib 41a is chamfered and, thereby, it becomes easy to install the lighting fixture 10 along the corner | angular of a structure.

  As shown in FIG. 2, the base portion 41 has an opening in a region between the second rib 41b and the third rib 41c, and the attachment member 80 protrudes outside the lighting fixture 10 from the opening. . The attachment member 80 is a member for attaching the luminaire 10 to the structure, and the luminaire 10 is installed in the structure by a rod-like member inserted into the insertion hole of the attachment member 80.

  The first wall portion 42 is a substantially rectangular plate-like portion erected on the end portion of the base portion 41 on the light guide plate 32 side. In other words, the end portion of the base portion 41 on the light guide plate 32 side is the end portion of the base portion 41 on the X-axis side. The first wall portion 42 is an example of a non-translucent plate material facing the second main surface 32c of the light guide plate 32, and covers the second main surface 32c. In a state where the lighting fixture 10 is installed in the structure, the first wall portion 42 basically does not contact the structure.

  The second wall portion 43 is a substantially rectangular plate-like portion erected on the end portion of the base portion 41 opposite to the light guide plate 32. In other words, the end portion of the base portion 41 opposite to the light guide plate 32 is the end portion of the base portion 41 on the X axis + side. The height of the second wall portion 43 from the main surface of the base portion 41 is lower than the height of the first wall portion 42 from the main surface of the base portion 41. A first engaging portion 44 is disposed on the inner surface of the second wall portion 43. In a state where the lighting fixture 10 is installed in the structure, the second wall portion 43 basically contacts the structure.

  The first engagement portion 44 is a portion for locking the cover 20 to the instrument main body 40, and is disposed on the inner surface of the second wall portion 43. The first engaging portion 44 engages with the first engaged portion 23 included in the cover 20. The first engaging portion 44 forms a groove along the longitudinal direction of the lighting fixture 10, and an end portion where the first engaged portion 23 of the cover 20 is provided is inserted into the groove. Specifically, the first engaging portion 44 includes, for example, a convex portion protruding to the X axis + side and engages with a convex portion protruding to the X axis − side included in the first engaged portion 23. .

  In the lighting fixture 10, a space S <b> 2 (shown in FIG. 6) is formed between the first engagement portion 44 and the base portion 41. The space S2 is useful as a space for accommodating the power cable. If the power cable is accommodated in the space S2, the first engagement portion 44 also functions as a power cable presser.

  The position restricting portion 45 is located at the end on the Z axis + side of the first wall portion 42, and the cross-sectional shape is a square bracket portion. The position restricting portion 45 forms a groove along the longitudinal direction of the lighting fixture 10, and the end on the Z axis + side of the light guide plate 32 is inserted into the groove. Thereby, the position of the light guide plate 32 is regulated.

[Power supply and terminal block]
The power supply device 50 is a device that supplies power to the light emitting device 31 of the light guide plate unit 30. Specifically, the power supply device 50 converts AC power obtained via a power cable (not shown) inserted into the terminal block 60 into power suitable for light emission of the plurality of LED elements 31b included in the light emitting device 31. Then, the converted electric power is supplied to the plurality of LED elements 31b. As a result, the plurality of LED elements 31 b emit light using the power supplied from the power supply device 50.

  Specifically, the power supply device 50 includes a circuit that converts AC power into DC power, for example. The plurality of circuit elements constituting the circuit include, for example, a capacitor element such as an electrolytic capacitor or a ceramic capacitor, a resistor element such as a resistor, a rectifier element, a fuse, a noise filter, a diode, and a semiconductor element such as an integrated circuit element. Etc. are included. A circuit that converts AC power into DC power is, for example, a switching power supply circuit.

  The terminal block 60 is a terminal unit into which a power cable for the lighting apparatus 10 to obtain AC power from the power system is inserted. Although not shown in detail, the terminal block 60 includes a substantially rectangular parallelepiped main body, a quick connection terminal disposed in the main body, and the like. The quick connection terminal is electrically connected to an end of a power cable inserted into an insertion hole provided in the main body. Note that a cable for transmitting a signal such as a dimming signal may be inserted into the terminal block 60.

[cover]
The cover 20 covers the power supply device 50. The cover 20 constitutes the housing 25 of the lighting fixture 10 together with the fixture body 40. The cover 20 has a long shape whose longitudinal direction is the Y-axis direction. The cover 20 is produced by, for example, extrusion molding of a metal material such as aluminum. Therefore, the cross-sectional shape obtained by cutting the cover 20 along a plane perpendicular to the Y-axis direction is substantially the same regardless of the cutting position. Note that the cover 20 may be manufactured by a method other than extrusion. Moreover, it is not essential that the cover 20 is formed of a metal material, and the cover 20 may be formed of a resin material.

  The cover 20 has a first engaged portion 23 and a second engaged portion 24. The first engaged portion 23 is disposed at the end on the X axis + side of the cover 20. The first engaged portion 23 is a rib-shaped portion that protrudes toward the Z-axis and is long in the Y-axis direction. The first engaged portion 23 includes a convex portion that protrudes toward the X axis − side, and the convex portion engages with a convex portion that protrudes toward the X axis + side of the first engaging portion 44.

  The second engaged portion 24 is disposed at the end of the cover 20 on the X axis − side. The second engaged portion 24 is a rib-like portion that protrudes toward the Z-axis and is long in the Y-axis direction. The second engaged portion 24 includes a convex portion protruding toward the X axis + side, and the convex portion engages with a convex portion protruding toward the X axis− side of the second engaging portion 34.

  As described above, the first engaged portion 23 and the first engaging portion 44 are engaged, and the second engaged portion 24 and the second engaging portion 34 are engaged. Locks to the instrument body 40. According to such an engagement structure, attachment of the cover 20 to the instrument body 40 is facilitated. The cover 20 may be attached to the instrument body 40 by a method other than engagement, such as screwing.

  The surface of the cover 20 has light reflectivity. The surface of the cover 20 has light reflectivity by applying, for example, a white paint, and reflects light emitted from the first main surface 32 b of the light guide plate 32. Thereby, the utilization efficiency of the light radiate | emitted from the 1st main surface 32b of the light-guide plate 32 can be improved. It is not essential that the surface of the cover 20 has light reflectivity.

  The surface of the cover 20 includes an inclined surface 21. At least a part of the inclined surface 21 is located between the power supply device 50 and the light guide plate 32. The portion of the inclined surface 21 located closer to the light guide plate 32 has a lower height from the base portion 41. Thereby, since the exposed area of the first main surface 32b of the light guide plate 32 is increased as compared with the case where the cover 20 is not inclined, the utilization efficiency of the light emitted from the first main surface 32b of the light guide plate 32 can be improved. it can.

  Further, the inclined surface 21 is curved. Thereby, the inclined surface 21 can reflect light more uniformly.

  The surface of the cover 20 includes a flat surface 22 that faces the first main surface 32b. Thereby, it becomes easy to arrange a cushion material or packing in the space S1 (shown in FIG. 6) between the flat surface 22 and the first main surface 32b. For example, if the cushion material is previously disposed in the space S1, it is possible to prevent the light guide plate 32 from being scratched when the cover 20 is attached.

[End cover]
The end cover 70 is an end cap that covers one end of the instrument body 40 in the longitudinal direction. The end cover 70 is formed of a resin material such as ASA (Acrylate Styrene Acrylonitrile) resin, but may be formed of a metal material. The end cover 70 is screwed to the base portion 41 of the instrument main body 40.

  In addition, the other edge part of the lighting fixture 10 may be covered with an end cover, and another lighting fixture may be connected.

[Effects]
As described above, the lighting fixture 10 includes the light emitting device 31, the power supply device 50 that supplies power to the light emitting device 31, the side surface 32 a, and the first main surface 32 b facing the power supply device 50, The light guide plate 32 that emits light from the light emitting device 31 that has entered the side surface 32 a from the first main surface 32 b, the light emitting device 31, the light guide plate 32, the instrument main body 40 that supports the power supply device 50, and the power supply device 50. And a cover 20 for covering. The light emitting device 31 is an example of a light source.

  Thereby, the power fixture built-in type lighting fixture 10 with which the electrical work at the time of installation is easy is realizable. That is, the lighting fixture 10 that is easy to install is realized. Moreover, since the power supply device 50 is arranged on the first main surface 32b side of the light guide plate 32, it is possible to suppress the appearance of the second main surface 32c from protruding and damaging the appearance.

  Moreover, the surface of the cover 20 has light reflectivity, and may reflect the light emitted from the first main surface 32b.

  Thereby, the utilization efficiency of the light radiate | emitted from the 1st main surface 32b of the light-guide plate 32 can be improved.

  The light guide plate 32 may have a second main surface 32c opposite to the first main surface 32b. The lighting fixture 10 may further include a first wall portion 42 that faces the second main surface 32c. The 1st wall part 42 is an example of the non-light-transmissive board | plate material which opposes the 2nd main surface 32c.

  Thereby, in the lighting fixture 10, the member equivalent to the 1st wall part 42 in general indirect illumination can be abbreviate | omitted.

  Further, the surface of the cover 20 may include an inclined surface 21, and at least a part of the inclined surface 21 may be located between the power supply device 50 and the light guide plate 32.

  Thereby, the exposed area of the 1st main surface 32b of the light-guide plate 32 can be increased rather than the case where the cover 20 is not inclined. If the exposed area of the first main surface 32b increases, the utilization efficiency of the light emitted from the first main surface 32b of the light guide plate 32 can be increased.

  Further, the instrument main body has a base portion 41 on which the power supply device 50 is placed, and the inclined surface 21 may have a lower height from the base portion 41 as the portion is located near the light guide plate 32.

  Thereby, since the exposed area of the first main surface 32b of the light guide plate 32 is increased as compared with the case where the cover 20 is not inclined, the utilization efficiency of the light emitted from the first main surface 32b of the light guide plate 32 can be improved. it can.

  The inclined surface 21 may be curved.

Thereby, the inclined surface 21 can reflect light more uniformly. Moreover, the surface of the cover 20 may include the flat surface 22 which opposes the 1st main surface 32b.

  Thereby, it becomes easy to arrange | position a cushioning material or packing etc. in the space S1 between the plane 22 and the 1st main surface 32b.

  Further, the instrument main body 40 may have a first engaging portion 44, and the cover 20 may have a first engaged portion 23 that engages with the first engaging portion 44.

  Thereby, the cover 20 and the instrument main body 40 can be engaged. In other words, the cover 20 can be attached to the instrument body 40.

  Moreover, the instrument main body 40 may include a base portion 41 on which the power supply device 50 is placed, and a second wall portion 43 erected on the end of the base portion 41 opposite to the light guide plate 32. . The first engaging portion 44 may be disposed on the inner surface of the second wall portion 43, and the first engaged portion 23 may be disposed on the end portion of the cover 20 opposite to the light guide plate 32.

  Thereby, the cover 20 and the instrument main body 40 can be engaged at the end opposite to the light guide plate 32.

  The fixture body 40 has a base portion 41 on which the power supply device 50 is placed. The lighting fixture 10 is further placed on the base portion 41 and holds a light guide plate 32, and a holding member. And a second engaging portion 34 attached to 33. The cover 20 may have a second engaged portion 24 that engages with the second engaging portion 34 at the end on the light guide plate 32 side.

  Thereby, the cover 20 and the instrument main body 40 can be engaged via the holding member 33. In other words, the cover 20 can be attached to the instrument body 40 via the holding member 33.

  Further, the second engagement portion 34 may have higher elasticity than the holding member 33.

  Thereby, the cover 20 and the instrument main body 40 can be easily engaged using the high elasticity of the holding member 33. In other words, the cover 20 can be easily attached to the instrument body 40 via the holding member 33.

  Moreover, the lighting fixture 10 may be long.

  Thereby, it is the illuminating device 10 with a built-in power supply device in which the electrical work at the time of installation is easy, and the long illuminating device 10 can be realized.

[Modification 1]
The shape of the cover 20 is an example, and the lighting apparatus 10 may include a cover having another shape. For example, the luminaire 10 may include a flat cover 20a that does not have an inclined surface like the luminaire 10a illustrated in FIG. 7, or the cover 20b that the luminaire 10b illustrated in FIG. 8 includes. In addition, the inclined surface 21b may be a flat surface. 7 and 8 are schematic cross-sectional views showing modifications of the shape of the cover.

[Modification 2]
The light guide plate 32 may emit the light from the light emitting device 31 incident on the side surface 32a also from the second main surface 32c. In this case, at least one of the first main surface 32b and the second main surface 32c is provided with a reflection structure for reflecting the light incident on the side surface 32a toward the second main surface 32c. Due to such a reflection structure, the second main surface 32c of the light guide plate 32 emits light. The reflection structure is, for example, a fine prism, but may be another structure.

  When the light guide plate 32 emits light from the second main surface 32c, the first wall portion 42 is formed of a material having translucency, for example. Thereby, the light emitted from the 2nd main surface 32c can be taken out outside. In this case as well, in order to block the light emitted from the side surface 32d opposite to the side surface 32a of the light guide plate 32, the portion of the position restricting portion 45 that faces the side surface is formed of a non-translucent material. It is good to be done.

  Further, when the light guide plate 32 emits light from the second main surface 32c, a part or all of the second main surface 32c may be exposed. That is, the first wall portion 42 may be omitted.

  As described above, in the lighting fixture 10, the light guide plate 32 has the second main surface 32c opposite to the first main surface 32b, and the light from the light emitting device 31 incident on the side surface 32a is the second main surface. The light may be emitted from 32c.

  Thereby, the lighting fixture 10 can illuminate space or a structure with the light from the 2nd main surface 32c.

(Other embodiments)
Although the embodiment has been described above, the present invention is not limited to such an embodiment.

  For example, in the said embodiment, although the lighting fixture was elongate, shapes other than elongate may be sufficient as a lighting fixture. The lighting fixture may have any shape.

  In the above embodiment, the light emitting device is a light emitting device having an SMD structure, but may be a light emitting device having a COB (Chip On Board) structure. In a light emitting device having a COB structure, an LED chip is used as a light emitting element, the LED chip is directly mounted on a substrate, and the LED chip is sealed with a translucent resin material containing phosphor particles. The light emitting device may be a remote phosphor type light emitting device having an LED chip and a resin member including phosphor particles arranged at a position away from the LED chip.

  The light emitting element is not limited to an LED chip or an element using the LED chip. For example, a solid-state light emitting element other than the LED chip, such as a semiconductor laser or an organic EL (Electro Luminescence), may be used as the light emitting element.

  In addition, one or a plurality of modes may be used in the present embodiment in which various modifications conceived by those skilled in the art have been made in this embodiment, or in a configuration constructed by combining components in different embodiments, without departing from the spirit of the present invention. It may be included in the range.

10, 10a, 10b Lighting fixture 20, 20a, 20b Cover 21, 21b Inclined surface 22 Plane 23 First engaged portion 24 Second engaged portion 30 Light guide plate unit 31 Light emitting device (light source)
32 light guide plate 32a side surface 32b first main surface 32c second main surface 33 holding member 34 second engagement portion 40 instrument body 41 base portion 42 first wall portion (plate material)
44 1st engaging part 50 Power supply device

Claims (13)

A light source;
A power supply for supplying power to the light source;
A light guide plate having a side surface and a first main surface facing the power supply device, and emitting light from the light source incident on the side surface from the first main surface;
An instrument body that supports the light source, the light guide plate, and the power supply device;
A lighting fixture comprising: a cover that covers the power supply device. The lighting fixture according to claim 1, wherein a surface of the cover has light reflectivity and reflects light emitted from the first main surface. The illumination according to claim 1, wherein the light guide plate has a second main surface opposite to the first main surface, and emits light from the light source incident on the side surface from the second main surface. Instruments. The light guide plate has a second main surface opposite to the first main surface,
The lighting fixture according to any one of claims 1 to 3, wherein the lighting fixture further includes a non-translucent plate material facing the second main surface. The surface of the cover includes an inclined surface;
The lighting fixture according to any one of claims 1 to 4, wherein at least a part of the inclined surface is located between the power supply device and the light guide plate. The instrument body has a base portion on which the power supply device is placed,
The lighting apparatus according to claim 5, wherein the inclined surface has a lower height from the base portion as it is located closer to the light guide plate. The lighting apparatus according to claim 5, wherein the inclined surface is curved. The lighting fixture according to claim 1, wherein a surface of the cover includes a flat surface facing the first main surface. The instrument body has a first engagement portion,
The lighting fixture according to claim 1, wherein the cover includes a first engaged portion that engages with the first engaging portion. The instrument main body has a base portion on which the power supply device is placed, and a wall portion erected on an end portion of the base portion opposite to the light guide plate,
The first engaging portion is disposed on the inner surface of the wall portion,
The lighting fixture according to claim 9, wherein the first engaged portion is disposed at an end portion of the cover on the side opposite to the light guide plate. The instrument body has a base portion on which the power supply device is placed,
The lighting apparatus further includes:
A holding member mounted on the base portion and holding the light guide plate;
A second engagement portion attached to the holding member,
The lighting device according to claim 1, wherein the cover has a second engaged portion that engages with the second engaging portion at an end portion on the light guide plate side. The lighting apparatus according to claim 11, wherein the second engagement portion has higher elasticity than the holding member. The lighting fixture according to any one of claims 1 to 12, wherein the lighting fixture has a long shape.

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