Lighting fixtures

Abstract

To provide a luminaire that has a speaker function while restraining an increase in weight and an increase in size.SOLUTION: A luminaire 1 comprises a plurality of light sources 30, a board 20 on which the plurality of light sources 30 are mounted, a main body 10 to which the board 20 is fixed, a light guide plate 40 on which light emitted from the plurality of light sources 30 is incident, a fitting screw 71 that is one example of a fixing member for fixing the light guide plate 40 and the main body 10, and a vibrator 50 for vibrating a member constituting the luminaire 1.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a lighting fixture, and more particularly to a lighting fixture having a speaker function. [Background technology]

[0002] A ceiling light is known as one type of lighting fixture that illuminates a room (see, for example, Patent Document 1). A ceiling light includes a fixture body that is attached to a ceiling, a board fixed to the fixture body, and a light source that is made up of multiple LEDs (Light Emitting Diodes) mounted on the board.

[0003] Also, a light guide type lighting fixture that guides the light of a light source and irradiates it toward the room has been proposed as a ceiling light. As a light guide type lighting fixture, a ceiling light equipped with a light guide plate that guides the light of a first light source and a diffusion cover that diffuses the light of a second light source is known.

[0004] In recent years, lighting fixtures with speakers have been proposed, specifically light-guiding ceiling lights equipped with speakers. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-48167 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, conventional lighting fixtures with speakers have the problem that the weight increases and the overall size of the lighting fixture increases because a speaker of an existing size is added to the basic structure of the lighting fixture. For example, when a speaker is stored in a housing that stores a light source unit, the size of the housing must be increased, and the overall size of the lighting fixture increases. On the other hand, even when a speaker is attached externally to a housing that stores a light source unit, the overall size of the lighting fixture increases by the size of the speaker. Moreover, when a speaker is attached externally, the design (designability) of the entire lighting fixture may be deteriorated. In addition, there is also the problem that the workability of installing the lighting fixture becomes worse when the weight or size of the lighting fixture increases.

[0007] The present invention has been made in consideration of such problems, and has an object to provide a lighting fixture that has a speaker function while suppressing increases in weight and size. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, one aspect of a lighting device according to the present invention comprises a plurality of light sources, a substrate on which the plurality of light sources are mounted, a main body to which the substrate is fixed, a light guide plate into which light emitted from the plurality of light sources enters, a fixing member that fixes the light guide plate and the main body, and a vibrator that vibrates components that constitute the lighting device. Effect of the Invention

[0009] According to the present invention, it is possible to realize a lighting fixture having a speaker function while suppressing increases in weight and size. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment when viewed from the floor surface side. [Diagram 2] FIG. 2 is a perspective view of the lighting fixture according to the embodiment as viewed from the ceiling side. [Diagram 3]FIG. 3 is a perspective view of the lighting device according to the first embodiment with the diffusion cover removed. [Figure 4] FIG. 4 is an exploded perspective view of the lighting fixture according to the embodiment. [Diagram 5] FIG. 5 is a cross-sectional view showing a state in which the lighting fixture according to the embodiment is installed on a ceiling. [Figure 6] FIG. 6 is an enlarged cross-sectional view of a lighting device according to an embodiment. [Figure 7] FIG. 7 is a plan view of the lighting fixture according to the embodiment with the light source cover, the power supply cover, the diffusion cover, the decorative cover, and the support member removed. [Figure 8] FIG. 8 is an enlarged cross-sectional view of a lighting fixture according to the first modification. [Figure 9] FIG. 9 is a plan view of the lighting fixture according to the first modified example with the light source cover, the power supply cover, the diffusion cover, the decorative cover, and the support member removed. [Figure 10] FIG. 10 is a plan view of the lighting fixture according to the second modification example with the light source cover, the power supply cover, the diffusion cover, the decorative cover, and the support member removed. [Figure 11] FIG. 11 is an enlarged cross-sectional view of a lighting device according to the third modification. [Figure 12] FIG. 12 is an enlarged cross-sectional view of a lighting fixture according to the fourth modification. [Figure 13] FIG. 13 is an enlarged cross-sectional view of a lighting fixture according to the fifth modification. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present invention will be described. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, and the arrangement and connection forms of the components shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims showing the highest concept of the present invention will be described as optional components.

[0012] In addition, each figure is a schematic diagram and is not necessarily a precise illustration. In each figure, the same reference numerals are used for substantially the same configuration, and duplicated explanations are omitted or simplified. In this specification, the terms "upper" and "lower" do not necessarily refer to the upper direction (vertically upward) and the lower direction (vertically downward) in absolute spatial recognition.

[0013] (Embodiment) A lighting fixture 1 according to an embodiment will be described with reference to Figs. 1 to 7. Fig. 1 is a perspective view of the lighting fixture 1 according to the embodiment when viewed from the floor surface side. Fig. 2 is a perspective view of the lighting fixture 1 when viewed from the ceiling side. Fig. 3 is a perspective view of the lighting fixture 1 with the diffusion cover 83 removed. Fig. 4 is an exploded perspective view of the lighting fixture 1. Fig. 5 is a cross-sectional view showing the lighting fixture 1 installed on the ceiling 2. Fig. 6 is an enlarged cross-sectional view of the lighting fixture 1 in Fig. 5. Figs. 5 and 6 show only the lines that appear in the cross section. Fig. 7 is a plan view of the lighting fixture 1 with the light source cover 81, the power supply cover 82, the diffusion cover 83, the decorative cover 84, and the support member 60 removed.

[0014] The lighting fixture 1 is installed, for example, in the construction materials of a building such as a house. As an example, the lighting fixture 1 is a ceiling light installed on the ceiling of a room of a building, and irradiates the room with illumination light. As shown in FIG. 5, the lighting fixture 1 is installed on the ceiling by being attached to a hook ceiling 2a provided on the ceiling 2. For convenience, FIG. 5 shows the lighting fixture 1 with the ceiling 2 facing downward.

[0015] 1 to 7, the lighting device 1 includes a main body 10, a substrate 20, a light source 30, a light guide plate 40, an oscillator 50, a support member 60, and mounting screws 71 and 72. The lighting device 1 further includes a light source cover 81, a power supply cover 82, a diffusion cover 83, and a decorative cover 84.

[0016] The lighting fixture 1 in this embodiment is a light guide type lighting fixture that includes a light guide plate 40, and the light from the light source 30 is guided by the light guide plate 40 to be emitted as illumination light.

[0017] The main body 10 is the main body of the lighting fixture 1. As shown in FIG. 5, the main body 10 is a base that supports the substrate 20. The substrate 20 is fixed to the main body 10. The main body 10 also functions as a heat sink for dissipating heat generated by the light source 30 mounted on the substrate 20. Therefore, the main body 10 is preferably made of a metal material. In this embodiment, the main body 10 is made of sheet metal, and is formed into a predetermined shape by pressing a sheet metal such as a steel plate or an aluminum plate.

[0018] The main body 10 is composed of two parts, a first main body 10a and a second main body 10b. The first main body 10a and the second main body 10b are both made of sheet metal. The first main body 10a and the second main body 10b are fixed to each other by screws or the like.

[0019] The first body 10a supports the substrate 20. Specifically, the substrate 20 is placed on a flat surface of the first body 10a and fixed to the first body 10a. The second body 10b constitutes an outer member of the lighting device 1. Therefore, the outer surface of the second body 10b is exposed to the outside air. The body 10 may be formed of a single sheet metal part.

[0020] As shown in Figures 4 and 5, a substantially circular through hole is formed in the center of the main body 10. As shown in Figure 5, a cylindrical insulating member 11 is fixed in this through hole. A holder 12 is attached to the insulating member 11. An adapter 13 is detachably attached to the holder 12. In other words, the holder 12 supports the adapter 13. The adapter 13 is a plug that is electrically and mechanically connected to a hook ceiling 2a provided on the ceiling 2. The adapter 13 is provided with a pair of L-shaped metal fittings that are engaged with a pair of holes provided in the hook ceiling 2a to establish electrical contact.

[0021] A plurality of cushion members 14 made of urethane or the like are attached to the ceiling side surface of the main body 10. Specifically, as shown in Fig. 2, four cushion members 14 are provided on the ceiling side surface of the second main body 10b.

[0022] The substrate 20 disposed on the main body 10 is a light source substrate on which the light source 30 is disposed. The substrate 20 and the light source 30 constitute a light source module that serves as a light source section of the lighting fixture 1. In the present embodiment, the light source 30 is constituted by an LED, and therefore the light source module is an LED module.

[0023] The substrate 20 is a mounting substrate for mounting the light source 30. The substrate 20 has a first surface (surface facing the floor) on which the light source 30 is mounted, and a second surface (surface facing the ceiling) facing away from the first surface. The substrate 20 is, for example, a printed wiring board on which metal wiring of a predetermined shape is formed. The substrate 20 may be divided into a plurality of substrates.

[0024] 4, in this embodiment, the substrate 20 is an annular mounting substrate having a through hole in the center. The through hole of the substrate 20 communicates with the through hole of the main body 10. A lead wire is drawn from the adapter 13 through the through hole of the substrate 20 and is connected to a connector provided on the substrate 20.

[0025] The substrate 20 is, for example, a resin substrate made of an insulating resin material. The substrate 20 is not limited to a resin substrate, but may be a metal-based substrate made of a metal material whose surface is coated with a resin, a ceramic substrate which is a sintered body of a ceramic material, or a glass substrate made of a glass material. The substrate 20 is a rigid substrate, but is not limited thereto, and may be a flexible substrate.

[0026] A plurality of light sources 30 are mounted on the substrate 20. Specifically, the plurality of light sources 30 are mounted on a first surface of the substrate 20. The light sources 30 emit illumination light for brightening a space using the lighting device 1.

[0027] 4 and 5, in this embodiment, the light source 30 includes a first light source 31 and a second light source 32. A plurality of the first light sources 31 and a plurality of the second light sources 32 are mounted on a first surface of the substrate 20. As shown in FIG. 7, the plurality of first light sources 31 and the plurality of second light sources 32 are arranged in a line in an annular shape at intervals in the circumferential direction of the substrate 20. Note that one or both of the plurality of first light sources 31 and the plurality of second light sources 32 may be arranged in a plurality of lines.

[0028] 5 to 7, the multiple first light sources 31 are arranged to face the light entrance section 41 of the light guide plate 40. Therefore, light emitted from the first light sources 31 enters the light guide plate 40 from the light entrance section 41. The light of the first light sources 31 that enters the light guide plate 40 is guided inside the light guide plate 40 and emitted to the outside of the lighting device 1. In this way, each of the multiple first light sources 31 is a light source for the light guide plate.

[0029] As shown in Fig. 4 and Fig. 7, the second light sources 32 are disposed inside the first light sources 31. As shown in Fig. 5, the first light sources 31 are covered with a light source cover 81. Therefore, light emitted from the second light sources 32 enters the light source cover 81 without entering the light guide plate 40. In addition, the light source cover 81 is covered with a diffusion cover 83. Therefore, the light emitted from the second light source 32 passes through the light source cover 81 and the diffusion cover 83 and is emitted to the outside of the lighting device 1.

[0030] The first light source 31 and the second light source 32 are LED light sources composed of LEDs. In this embodiment, each of the first light source 31 and the second light source 32 is a surface mount device (SMD) type light emitting element that is individually packaged. As an example, each of the first light source 31 and the second light source 32 is an LED element having a white resin or ceramic package (container) having a recess, an LED chip (bare chip) that is primarily mounted on the bottom surface of the recess of the package, and a sealing member that is sealed in the recess of the package. The sealing member is composed of a translucent resin material such as silicone resin. The sealing member may be a phosphor-containing resin that contains a wavelength conversion material such as a phosphor.

[0031] The LED chip is an example of a semiconductor light-emitting element that emits light using a specific DC power, and is a bare chip that emits monochromatic visible light. The LED chip is, for example, a blue LED chip that emits blue light when powered. In this case, in order to obtain white light, the sealing material contains a yellow phosphor such as YAG (yttrium aluminum garnet) that fluoresces using the blue light from the blue LED chip as excitation light.

[0032] In this way, each of the first light source 31 and the second light source 32 is a BY type white LED element composed of a blue LED chip and a yellow phosphor. Specifically, the yellow phosphor contained in the sealing member is excited by absorbing a part of the blue light from the blue LED chip and emits yellow light. This emitted yellow light is mixed with the blue light not absorbed by the yellow phosphor to generate white light. In this way, each of the first light source 31 and the second light source 32 emits white light.

[0033] The first light source 31 and the second light source 32 may be configured to emit light of the same color, or may be configured to emit light of different colors. For example, the first light source 31 and the second light source 32 may be configured to emit white light of different color temperatures. In this case, as an example, the color temperature of the light of the first light source 31 is lower than the color temperature of the light of the second light source 32. In this case, the light of the first light source 31 can be an incandescent color, and the light of the second light source 32 can be a neutral white color. Furthermore, the multiple first light sources 31 or the multiple second light sources 32 may be configured to emit light of different colors.

[0034] Furthermore, the first light source 31 and the second light source 32 may emit light simultaneously, or one of the first light source 31 and the second light source 32 may emit light. In this case, when the plurality of light sources 30 includes light sources that emit light of different colors, the lighting device 1 may have not only a function of dimming the illumination light but also a function of adjusting the color of the illumination light.

[0035] Moreover, the light source module in this embodiment is an integrated power supply type. Therefore, although not shown, not only the light source 30 is mounted on the substrate 20, but also a plurality of circuit elements constituting a power supply circuit are mounted thereon. In other words, the substrate 20 is both a light source substrate and a power supply circuit substrate. The plurality of circuit elements mounted on the substrate 20 may be mounted on only one of the first surface and the second surface of the substrate 20, or may be mounted on both the first surface and the second surface of the substrate 20.

[0036] The multiple circuit elements mounted on the substrate 20 are circuit components constituting a power supply circuit that generates power for making the light sources 30 (the first light source 31 and the second light source 32) emit light. The multiple circuit elements convert AC power supplied from a commercial power source via the hook ceiling 2a and the adapter 13 into DC power. The DC power generated by the power supply circuit is supplied to each of the multiple light sources 30 (the first light source 31 and the second light source 32), causing each of the multiple light sources 30 to emit light. The multiple circuit elements are, for example, capacitive elements such as electrolytic capacitors or ceramic capacitors, resistive elements such as resistors, rectifier circuit elements, coil elements, choke coils (choke transformers), noise filters, and semiconductor elements such as diodes or integrated circuit elements. The circuit elements may include circuit components constituting a dimming circuit or a boost circuit, or may include circuit components (communication modules) constituting a wireless communication circuit.

[0037] The board on which the circuit elements constituting the power supply circuit are mounted may be separate from the board 20 on which the light source 30 is mounted.

[0038] The light guide plate 40 is an optical member into which light emitted from the multiple light sources 30 enters. In the present embodiment, light emitted from the multiple first light sources 31 enters the light guide plate 40. The light that enters the light guide plate 40 is guided inside the light guide plate 40 and emitted to the outside of the lighting device 1. In other words, the light guide plate 40 is a light guide member for guiding the light emitted from the multiple first light sources 31 to the outside of the lighting device 1.

[0039] The light guide plate 40 is made of a translucent resin material, for example, an acrylic resin such as PMMA (polymethyl methacrylate) resin or a polycarbonate resin. The light guide plate 40 may be made of a transparent resin material having a high transmittance so that the other side can be seen through. In this embodiment, the light guide plate 40 is made of a transparent plate made of acrylic resin. The light guide plate 40 is not limited to a transparent resin plate made of a resin material, and may be a glass plate made of transparent glass.

[0040] 4 and 7, the light guide plate 40 is annular and has an opening 40a in the center. In the present embodiment, the outer shape of the light guide plate 40 is circular. Therefore, the light guide plate 40 is substantially annular. The second light sources 32 and the light source cover 81 are disposed at positions facing the opening 40a of the light guide plate 40.

[0041] As shown in FIGS. 5 to 7, the light guide plate 40 has a light entrance portion 41, a curved portion 42, and a light exit portion 43 as a light guide region.

[0042] The light entrance portion 41 is formed in a ring shape around the entire circumference of one end of the curved portion 42, and defines the inner circumference of the light guide plate 40. The light entrance portion 41 is disposed at a position facing and close to the multiple first light sources 31. In other words, the multiple first light sources 31 are disposed at positions facing the inner circumference of the light guide plate 40. As a result, light emitted from the first light sources 31 enters the light entrance portion 41.

[0043] The curved portion 42 expands in a trumpet shape from one end (the end on the ceiling side) to the other end (the end on the floor side). In the present embodiment, the curved portion 42 is a curved plate with a constant thickness. The curved portion 42 guides the light incident on the light entrance portion 41 from one end to the other end. Specifically, the curved portion 42 guides the light of the first light source 31 incident from the light entrance portion 41 to the light exit portion 43. The curved portion 42 is supported by the decorative cover 84 and the support member 60. Specifically, the curved portion 42 is sandwiched between the decorative cover 84 and the support member 60.

[0044] The light exit portion 43 extends from the entire circumference of the other end of the curved portion 42 to the outside in the radial direction of the light guide plate 40. In this embodiment, the light exit portion 43 has a constant thickness and is a flat plate. Specifically, the light exit portion 43 is a circular flat plate formed to be approximately parallel to the ceiling surface. In a plan view, the light exit portion 43 extends so as to protrude from the diffusion cover 83 to the outside in the radial direction of the light guide plate 40. Specifically, the light exit portion 43 is formed so as to protrude horizontally from the support member 60 and the decorative cover 84. In other words, the light exit portion 43 is a part of the light guide plate 40 that is exposed to the outside. Therefore, when a user looks up at the lighting device 1, the user can visually recognize the light exit portion 43.

[0045] The light of the first light source 31, which is incident from the light incident portion 41 and guided from the curved portion 42 to the light exit portion 43, is emitted to the outside as surface emission from at least one of the surface on one side (surface on the floor side) and the surface on the other side (surface on the ceiling side) of the light exit portion 43. In this embodiment, the light of the first light source 31 incident to the light exit portion 43 is mainly emitted to the outside from the surface on one side (surface on the floor side) of the light exit portion 43. That is, the surface on one side (surface on the floor side) of the light exit portion 43 is the light exit surface. In this case, it is preferable that a plurality of dot-shaped prisms (for example, recesses such as triangular pyramids or cones) are formed on the surface on the other side (surface on the ceiling side) of the light exit portion 43. This allows the light of the first light source 31 incident to the light exit portion 43 to be totally reflected by the prism, travel toward the surface on one side (surface on the floor side), and be emitted from the surface on one side.

[0046] 4 and 7, the light guide plate 40 has a protrusion 44 formed to protrude into the opening 40a. Specifically, the protrusion 44 is formed to protrude from the light entrance portion 41 toward the inside in the radial direction of the light guide plate 40.

[0047] In this embodiment, the light guide plate 40 has a plurality of protrusions 44. One of the plurality of protrusions 44 is a transducer installation portion 44a on which a transducer 50 is installed. Specifically, one of the three protrusions 44 is the transducer installation portion 44a. The protrusion 44 that is the transducer installation portion 44a has a larger protrusion amount than the other two protrusions 44. That is, when viewed in a plan view, the protrusion 44 that is the transducer installation portion 44a has a larger area than the other two protrusions 44. This makes it possible to secure a space for installing the transducer 50 in the transducer installation portion 44a at a position closer to the center of the device than the mounting screw 71 corresponding to the fixing portion of the light guide plate 40.

[0048] Each of the multiple protruding parts 44 is provided with a through hole 45 into which a mounting screw 71 is inserted. The light guide plate 40 is attached to the main body 10 by inserting the mounting screw 71 into the through hole 45. Note that the through hole 45 formed in the protruding part 44 that is the transducer installation part 44a has a circular shape surrounded by a periphery, and the through holes 45 formed in the other two protruding parts 44 have a notch shape, but this is not limited thereto.

[0049] The vibrator 50 vibrates the components constituting the lighting device 1. In the present embodiment, the vibrator 50 is disposed on the light guide plate 40, and therefore, among the components constituting the lighting device 1, the component vibrated by the vibrator 50 is the light guide plate 40.

[0050] The vibrator 50 is composed of a coil, a magnet, etc., and converts an electrical signal into a vibration mechanical signal. In this embodiment, the vibrator 50 is installed on the light guide plate 40, so the vibrator 50 vibrates the light guide plate 40. When the light guide plate 40 vibrates, the air vibrates, and sound can be transmitted to the user. In this way, the vibrator 50 and the light guide plate 40 can convert an electrical signal input to the vibrator 50 into sound. For example, by vibrating the light guide plate 40 with the vibrator 50, the lighting device 1 can output sound such as music or voice (message).

[0051] The transducer 50 is installed on the protruding portion 44 of the light guide plate 40. Specifically, the transducer 50 is installed on the protruding portion 44, which is the transducer installation portion 44a. In the present embodiment, the transducer 50 is attached to the surface of the transducer installation portion 44a on the floor surface side.

[0052] 6 and 7, the protruding portion 44 of the light guide plate 40 is located closer to the center of the device than the light source 30. Therefore, the vibrator 50 installed on the protruding portion 44 is installed closer to the center of the device than the light source 30. In addition, the vibrator 50 is installed closer to the center of the device than the through hole 45 formed in the protruding portion 44. Therefore, the vibrator 50 is installed closer to the center of the device than the mounting screw 71 inserted into the through hole 45.

[0053] The transducer 50 is small and lightweight. The outer size of the transducer 50 is, for example, within 50 mm in length, width, and height, but is not limited to this.

[0054] Furthermore, vibrator 50 may have a wireless communication function such as Bluetooth (registered trademark) or wireless LAN. As a result, when a user wants to play music through lighting fixture 1, the user can play music from lighting fixture 1 by transmitting sound information (sound source) to vibrator 50 via an information terminal such as a smartphone. In other words, vibrator 50 receives sound information transmitted from the user's information terminal and vibrates in response to an electrical signal corresponding to the sound information.

[0055] The support member 60 is a member that supports the light guide plate 40. As shown in FIG. 6, the support member 60 is located on the floor side of the light guide plate 40. The support member 60 also functions as a reflective member for reflecting the light guided inside the curved portion 42 of the light guide plate 40. The support member 60 is made of, for example, a white resin. This allows the light that reaches the support member 60 to be reflected. The resin material that constitutes the support member 60 can be, for example, polycarbonate or PBT (polybutylene terephthalate).

[0056] The support member 60 is formed in a ring shape as a whole. Specifically, the support member 60 has a ring-shaped reflecting portion 61 and a protruding portion 62 formed on the reflecting portion 61.

[0057] The reflecting portion 61 has a reflective surface on its surface, and reflects light that reaches the reflecting portion 61. The reflecting portion 61 expands in a trumpet shape from one end (the end on the ceiling side) to the other end (the end on the floor side). The reflecting portion 61 covers the curved portion 42 of the light guide plate 40.

[0058] As shown in FIG. 4, the protrusion 62 is formed to protrude into the opening of the support member 60. Specifically, the protrusion 62 is formed to protrude toward the inside in the radial direction of the support member 60. In this embodiment, a plurality of protrusions 62 are formed. The plurality of protrusions 62 are formed corresponding to the plurality of protrusions 44 of the light guide plate 40. Specifically, three protrusions 62 are formed on the support member 60, and the three protrusions 62 are positioned to overlap the three protrusions 44 of the light guide plate 40 when viewed in a plan view.

[0059] Each of the multiple protrusions 62 is provided with a through hole into which a mounting screw 71 is inserted. The through hole formed in each protrusion 62 is in the shape of a notch, but is not limited thereto. The mounting screw 71 is inserted into the through hole formed in the protrusion 62, whereby the support member 60 is attached to the main body 10. The through hole formed in the protrusion 62 of the support member 60 communicates with the through hole 45 formed in the protrusion 44 of the light guide plate 40. Therefore, the mounting screw 71 is inserted into the through hole formed in the protrusion 62 of the support member 60 and the through hole 45 formed in the protrusion 44 of the light guide plate 40.

[0060] The mounting screw 71 is a fixing member that fixes the light guide plate 40 and the main body 10. Specifically, the mounting screw 71 fixes the light guide plate 40 to the main body 10. In this embodiment, the mounting screw 71 fixes not only the light guide plate 40 but also the support member 60 and the light source cover 81 to the main body 10. Specifically, as shown in FIG. 6, the mounting screw 71 is inserted through a through hole formed in the light source cover 81, a through hole formed in the protruding portion 62 of the support member 60, a through hole 45 formed in the protruding portion 44 of the light guide plate 40, and a through hole formed in the substrate 20, and is screwed into a screw hole of the first main body 10a. That is, the light source cover 81, the support member 60, the light guide plate 40, and the substrate 20 are fastened together by the mounting screw 71. The mounting screw 71 is, for example, a shoulder screw, but is not limited thereto, and other types of screws may be used.

[0061] 6, the mounting screw 71 is located closer to the center of the fixture than the light source 30. In other words, the light source 30 is located farther from the center of the fixture than the mounting screw 71. Specifically, the mounting screw 71 is located closer to the center of the fixture than the first light source 31, and the first light source 31 is located farther from the mounting screw 71 than the center of the fixture.

[0062] Moreover, the power supply cover 82 is fixed to the main body 10 by the mounting screw 72. In this embodiment, the mounting screw 72 fixes not only the power supply cover 82 but also the light source cover 81 to the main body 10. Specifically, the mounting screw 72 is inserted through a through hole formed in the power supply cover 82 and a through hole formed in the light source cover 81, and is screwed into a screw hole of the first main body 10a.

[0063] The light source cover 81 is a light-transmitting cover that covers the second light source 32. Therefore, the light emitted from the second light source 32 enters the light source cover 81 and passes through the light source cover 81. The light source cover 81 is formed in an annular shape so as to cover the multiple second light sources 32 arranged in an annular shape. Note that the light source cover 81 covers only the second light source 32 of the first light source 31 and the second light source 32, and does not cover the first light source 31.

[0064] The light source cover 81 may have a light distribution control function for controlling the light distribution of the light emitted from the second light source 32. For example, the light source cover 81 may have a lens function for expanding the light distribution angle of the light emitted from the multiple second light sources 32.

[0065] The light source cover 81 is attached to the main body 10 by mounting screws 71 and 72. The light source cover 81 is formed with a through hole through which the mounting screw 71 is inserted and a through hole through which the mounting screw 72 is inserted.

[0066] The light source cover 81 is located inside the light guide plate 40. Specifically, the light source cover 81 is disposed in the opening 40a of the light guide plate 40 so as to cover the protruding portion 44 of the light guide plate 40. At this time, the light source cover 81 is disposed so that the through holes of the light source cover 81 corresponding to the mounting screws 71 communicate with the through holes 45 formed in the protruding portion 44 of the light guide plate 40.

[0067] The light source cover 81 is made of a resin material having translucency. The light source cover 81 is made of, for example, acrylic, polycarbonate, polyethylene terephthalate, polyvinyl chloride, etc. The material of the light source cover 81 is not limited to a resin material, and may be glass, etc.

[0068] In the present embodiment, the light source cover 81 is transparent and does not have light diffusion properties, but the light source cover 81 may have light diffusion properties. By imparting light diffusion properties to the light source cover 81, it is possible to diffuse (scatter) the light from the second light source 32. In this case, the light source cover 81 is, for example, milky white, and can be made of a resin material in which light diffusion particles are dispersed.

[0069] The power supply cover 82 is a cover member that covers a plurality of circuit elements mounted on the substrate 20. Specifically, the power supply cover 82 covers the circuit elements mounted on the first surface (the surface on the floor side) of the substrate 20 among the plurality of circuit elements.

[0070] The power supply cover 82 is disposed inside the light source cover 81. The power supply cover 82 is in the shape of a ring surrounding the opening of the main body 10. The power supply cover 82 is attached to the main body 10 with mounting screws 72. The power supply cover 82 is formed with a through hole through which the mounting screw 72 is inserted. The power supply cover 82 is disposed such that the through hole of the light source cover 81 corresponding to the mounting screw 72 and the through hole of the power supply cover 82 communicate with each other.

[0071] The power supply cover 82 is a metal cover made of metal, but is not limited to this. For example, the power supply cover 82 may be a resin cover made of resin. The power supply cover 82 may also have reflectivity to reflect the light of the second light source 32 that has passed through the light source cover 81.

[0072] The diffusion cover 83 is a cover member having translucency and diffusibility. The diffusion cover 83 is disk-shaped and covers the main body 10, the light source cover 81, the power supply cover 82, and the support member 60. The diffusion cover 83 is arranged so as to cover the opening 40a of the light guide plate 40. Specifically, the diffusion cover 83 is arranged so as to cover the opening 40a of the light guide plate 40. As shown in FIG. 5, in this embodiment, the diffusion cover 83 is an outer cover that constitutes the outer shell of the lighting device 1.

[0073] The diffusion cover 83 is detachably attached to the support member 60. The diffusion cover 83 can be attached to or detached from the support member 60 by rotating it.

[0074] The diffusion cover 83 transmits the light emitted by the second light source 32. Specifically, the diffusion cover 83 diffuses (scatters) the light emitted from the second light source 32 and transmitted through the light source cover 81 and transmits the light. This allows the entire diffusion cover 83 to irradiate uniform illumination light with high luminance uniformity to the outside.

[0075] The diffusion cover 83 can be formed using a resin material having translucency. The diffusion cover 83 is made of, for example, acrylic, polycarbonate, polyethylene terephthalate, polyvinyl chloride, etc. The diffusion cover 83 is milky white, and can be made of, for example, a resin material in which light diffusion particles are dispersed.

[0076] The decorative cover 84 is a cover member that covers the main body 10 from the side. The decorative cover 84 is formed in a ring shape. Specifically, the decorative cover 84 spreads out in a trumpet shape from one end (the end on the floor side) to the other end (the end on the ceiling side). The decorative cover 84 is formed of, for example, white polystyrene resin.

[0077] A part of the decorative cover 84 is formed along the curved portion 42 of the light guide plate 40, and covers the curved portion 42 from the ceiling side. The curved portion 42 of the light guide plate 40 is located between a part of the decorative cover 84 and the reflecting portion 61 of the support member 60.

[0078] In the lighting fixture 1 configured in this manner, when DC power is supplied from the power supply circuit to the light source 30, the light source 30 (the first light source 31 and the second light source 32) emits light.

[0079] In this case, the light emitted from each of the multiple first light sources 31 enters the light entrance portion 41 of the light guide plate 40, and is then guided inside the curved portion 42. Inside the curved portion 42, the light from the multiple first light sources 31 is guided to the light exit portion 43 while being reflected by the reflecting portion 61 of the support member 60. The light guided to the light exit portion 43 is emitted to the outside as illumination light from the surface of the light exit portion 43. Note that the light emitted from the first light source 31 is irradiated to the outside of the lighting device 1 without passing through the light source cover 81 and the diffusion cover 83.

[0080] On the other hand, the light emitted from each of the second light sources 32 passes through the light source cover 81 and then enters the diffusion cover 83. The light from the second light source 32 that enters the diffusion cover 83 passes through the diffusion cover 83 while being diffused by the diffusion cover 83. In this way, the light emitted from the second light source 32 is irradiated to the outside of the lighting device 1 without entering the light guide plate 40.

[0081] As described above, the lighting fixture 1 in this embodiment comprises a plurality of light sources 30, a substrate 20 on which the plurality of light sources 30 are mounted, a main body 10 to which the substrate 20 is fixed, a light guide plate 40 into which light emitted from the plurality of light sources 30 enters, a mounting screw 71 (fixing member) that fixes the light guide plate 40 to the main body 10, and a vibrator 50 that vibrates the members that make up the lighting fixture 1.

[0082] With this configuration, the vibrator 50 can vibrate components constituting the lighting fixture 1 to output sound from the lighting fixture 1. This makes it possible to realize a lighting fixture 1 having a speaker function while suppressing increases in weight and size.

[0083] Furthermore, in the lighting device 1 according to the present embodiment, the vibrator 50 is not exposed to the outside. In other words, when the user looks up at the lighting device 1 from below, the vibrator 50 is not in the user's field of vision. Specifically, the vibrator 50 is disposed at a position overlapping the diffusion cover 83 in a plan view. As a result, even if the vibrator 50 is added to any position of the members constituting the lighting device 1, it is possible to realize a lighting device 1 having a speaker function that is small, lightweight, and excellent in design.

[0084] In addition, in lighting device 1 according to the present embodiment, vibrator 50 is disposed on light guide plate 40. That is, in lighting device 1, the member vibrated by vibrator 50 is light guide plate 40.

[0085] Since the light guide plate 40 in this embodiment is plate-shaped, the light guide plate 40 can be effectively vibrated by vibrating the vibrator 50 installed on the light guide plate 40. This allows sound to be output from the light guide plate 40.

[0086] In particular, since the light guide plate 40 has the light output portion 43 exposed to the outside, sound can be effectively output from the light output portion 43 to the outside (air) of the lighting fixture 1 by vibrating the light guide plate 40 with the vibrator 50. In other words, the light output portion 43 has a function of outputting light and a function of outputting sound.

[0087] However, since the light guide plate 40 guides light and irradiates illumination light to the outside, vibrating the light guide plate 40 with the vibrator 50 can output sound from the light guide plate 40, but this may cause fluctuations in the illumination light of the lighting device 1. For example, vibrating the light guide plate 40 may cause the illumination light of the lighting device 1 to flicker.

[0088] Here, in the light guide plate 40, the portion outside the fixing portion (mounting screw 71) between the light guide plate 40 and the main body 10 is less affected by the vibration caused by the vibrator 50. Therefore, in the lighting device 1 according to the present embodiment, the vibrator 50 is installed closer to the center of the device than the mounting screw 71. This makes it possible to suppress the occurrence of fluctuations in the illumination light of the lighting device 1 even if the vibrator 50 is installed on the light guide plate 40.

[0089] In this case, in this embodiment, the vibrator 50 is installed by utilizing the protruding portion 44 in which the through hole 45 through which the mounting screw 71 is inserted is formed. Moreover, one of the multiple protruding portions 44 is extended radially inward from the other protruding portions 44 to be longer, and is used as the vibrator installation portion 44a. That is, the vibrator installation portion 44a, which is a flat portion with a large area, is formed in a portion inside the mounting screw 71 that fixes the light guide plate 40 and the main body 10, and the vibrator 50 is installed on the vibrator installation portion 44a. This allows the protruding portion 44 (the vibrator installation portion 44a), which is a flat portion with a large area, to be effectively vibrated by the vibrator 50, and sound can be output from the light output portion 43. Therefore, the volume and quality of the sound output from the light guide plate 40 can be improved while suppressing the occurrence of fluctuations in the illumination light of the lighting device 1.

[0090] In the present embodiment, the light incident on light guide plate 40 from first light source 31 travels outward from first light source 31. Therefore, by locating transducer 50 closer to the center of the device than first light source 31, it is possible to effectively suppress fluctuations in the illumination light from lighting device 1.

[0091] Furthermore, as in this embodiment, by locating first light source 31, which emits light incident on light guide plate 40, closer to the center of the fixture than mounting screw 71, it is possible to further suppress fluctuations in the illumination light of lighting fixture 1. In other words, it is preferable that first light source 31 is located farther away from the center of the fixture than mounting screw 71.

[0092] 8 and 9, a slit 46 may be provided in the light guide plate 40 around the transducer 50. Specifically, the slit 46 is provided in the protruding portion 44, which is the transducer installation portion 44a.

[0093] This allows the slits 46 to block the propagation of the vibration of the light guide plate 40 (the protrusions 44) caused by the vibrator 50. Therefore, even if the light guide plate 40 vibrates due to the vibration of the vibrator 50, the vibration of the light guide plate 40 can be reduced, and fluctuations in the illumination light of the lighting device 1A can be suppressed.

[0094] In this case, it is preferable that the slit 46 is located between the vibrator 50 and the mounting screw 71 (fixing member). This makes it possible to prevent the vibration of the light guide plate 40 from propagating outside the mounting screw 71 even if the vibrator 50 vibrates and causes the light guide plate 40 to vibrate. This not only makes it possible to prevent the illumination light of the lighting device 1A from fluctuating, but also makes it possible to prevent the mounting screw 71 from becoming loose due to vibration and coming off.

[0095] Moreover, the slits 46 provided in the light guide plate 40 are not limited to being linear, but may be arc-shaped, etc. The number of slits 46 is not limited to being one, but may be multiple. In this case, the transducer 50 may be surrounded by the multiple slits 46.

[0096] (Modification) Although the present invention has been described based on the embodiment, the present invention is not limited to the above embodiment.

[0097] For example, in the above embodiment, the vibrator 50 is installed in the protruding portion 44 in which the through hole 45 is formed, but this is not limited thereto. Specifically, as in the lighting fixture 1B shown in FIG. 10, a protruding portion 44B may be provided separately from the protruding portion 44 in which the through hole 45 is formed, and the protruding portion 44B may be used as a vibrator installation portion 44a, and the vibrator 50 may be installed in the protruding portion 44B. Note that the protruding portion 44B is formed to protrude toward the opening 40a like the protruding portion 44, but the through hole 45 is not formed. Also, the protruding portion 44B (vibrator installation portion 44a) in which the vibrator 50 is installed has a larger protruding amount compared to the other protruding portions 44.

[0098] In addition, in the above embodiment, the vibrator 50 is disposed on the light guide plate 40, but this is not limiting.

[0099] For example, as in the lighting device 1C shown in FIG. 11, the vibrator 50 may be installed on the support member 60C. Specifically, in the lighting device 1C, a protruding portion 63 is provided on the support member 60C as a vibrator installation portion, and the vibrator 50 is installed on the protruding portion 63. The protruding portion 63 is formed in a flat plate shape so as to protrude radially inward so as to overhang the opening of the support member 60C. In this modification, since the vibrator 50 is installed on the support member 60C, the member vibrated by the vibrator 50 among the members constituting the lighting device 1C is the support member 60C. In addition, in this modification, since the support member 60C and the light guide plate 40C are in contact with each other, the light guide plate 40C also vibrates when the support member 60C is vibrated by the vibrator 50. In other words, the members vibrated by the vibrator 50 are both the support member 60C and the light guide plate 40C. In addition, in this modification, the light guide plate 40C does not have a protruding portion 44 serving as the vibrator installation portion 44a formed thereon.

[0100] In this way, by installing the vibrator 50 on the support member 60C, the vibrator 50 can vibrate the support member 60C to output sound from the lighting device 1C. This makes it possible to realize the lighting device 1C having a speaker function while suppressing an increase in weight and size. Moreover, in this modification, the vibrator 50 is not installed on the light guide plate 40C, so that it is possible to prevent the illumination light of the lighting device 1C from flickering due to the vibration of the light guide plate 40C. Furthermore, in this modification, not only the support member 60C but also the light guide plate 40C is vibrated by the vibrator 50, so that sound is output from both the support member 60C and the light guide plate 40C. This makes it possible to improve the volume and quality of the sound output from the lighting device 1C. Note that the support member 60C is stronger than the light guide plate 40C in terms of shape, material, arrangement structure, etc., so that by installing the vibrator 50 on the support member 60C, the vibrator 50 can be stably supported.

[0101] Also, as in the lighting fixture 1D shown in FIG. 12, a transducer mounting member 90 located closer to the ceiling than the light guide plate 40D may be further disposed, and the transducer 50 may be mounted on the transducer mounting member 90. The transducer mounting member 90 has a flat plate portion 91 exposed to the outside and a transducer mounting portion 92 on which the transducer 50 is mounted. The transducer mounting portion 92 faces the curved portion 42 of the light guide plate 40D and is positioned between the curved portion 42 and the decorative cover 84. The transducer mounting member 90 may be transparent or opaque. In this modification, the transducer 50 is mounted on the transducer mounting member 90, and therefore the member vibrating due to the transducer 50 among the members constituting the lighting fixture 1D is the transducer mounting member 90. In this modification, the light guide plate 40D does not have a protruding portion 44 serving as the transducer mounting portion 44a. In addition, the light guide plate 40D and the transducer mounting member 90 are disposed separately, and the light guide plate 40D and the transducer mounting member 90 are not in contact with each other.

[0102] In this way, by installing the vibrator 50 on the vibrator mounting member 90, it is possible to realize a lighting device 1D having a speaker function while suppressing an increase in weight and size. Moreover, since the vibrator 50 is not installed on the light guide plate 40D in this modification, it is possible to prevent the light guide plate 40D from vibrating and causing the illumination light of the lighting device 1D to flicker. Furthermore, in this modification, the material and shape of the vibrator mounting member 90 can be made such that the vibrator mounting member 90 is easily vibrated by the vibration of the vibrator 50, so that the volume and sound quality of the sound output from the lighting device 1D can be easily improved. Furthermore, since the vibrator mounting member 90 has a flat plate portion 91 exposed to the outside, it is possible to effectively improve the volume and sound quality of the sound output from the vibrator mounting member 90 by the vibration of the vibrator 50. Moreover, in this modification, the vibrator mounting portion 92 on which the vibrator 50 is installed is hidden inside the lighting device 1D and is not visible to the user, so that it is possible to suppress deterioration of the design due to the installation of the vibrator 50. Furthermore, as in this modification, by mounting the vibrator 50 on the vibrator mounting member 90 disposed separately from the light guide plate 40D, light is output from the light guide plate 40D but sound is not output, and sound is output from the vibrator mounting member 90 but light is not output. That is, in the lighting device 1D of this modification, the member having the function of outputting light and the member having the function of outputting sound are separated.

[0103] In the above embodiment, the mounting screw 71 is located outside the vibrator 50, but this is not limited thereto. For example, as in a lighting fixture 1E shown in Fig. 13, the mounting screw 71 may be located inside the vibrator 50. In the lighting fixture 1E as well, the first light source 31 that emits light to enter the light guide plate 40E may be located outside the vibrator 50. Note that Fig. 13 shows only the light guide plate 40E, the substrate 20, the light source 30, and the mounting screw 71, and other members are omitted.

[0104] In the above embodiment, the slits 46 formed in the light guide plate 40 are located inside the first light source 31, but this is not limited thereto. Specifically, the slits 46 formed in the light guide plate 40 may be located outside the first light source 31. In this case, for example, the slits 46 may be formed in the light exit portion 43. In addition, when the slits 46 are formed outside the first light source 31, it is preferable that the slits 46 do not exist on an extension line of a line connecting the center of the lighting fixture and the center of the first light source 31 when the light guide plate 40 is viewed from above. This makes it possible to suppress the light from the first light source 31 being blocked by the slits 46 when the light is guided radially outward inside the light guide plate 40.

[0105] In the above embodiment, only one vibrator 50 is provided on the light guide plate 40, but this is not limited thereto. Specifically, a plurality of vibrators 50 may be provided on the light guide plate 40. For example, a vibrator 50 may be provided on each of the plurality of protrusions 44 on the light guide plate 40. In this way, by providing a plurality of vibrators 50 on the light guide plate 40, the quality and volume of the sound output from the light guide plate 40 can be improved. In addition, when a plurality of vibrators 50 are used, it is preferable that the plurality of vibrators 50 includes a vibrator 50 for high tones and a vibrator 50 for low tones. This can further improve the quality of the sound output from the light guide plate 40. Note that instead of providing a plurality of vibrators 50 on the light guide plate 40, a vibrator 50 may be provided on each of different members. For example, a vibrator 50 may be provided on each of the light guide plate 40 and the support member 60. That is, the luminaire may include light guide plate 40 of luminaire 1 shown in FIGS. 1 to 7 and support member 60C of luminaire 1C shown in FIG.

[0106] In the above embodiment, the fixing member for fixing the light guide plate 40 and the main body 10 is exemplified as a screw, but is not limited thereto. Specifically, the fixing member for fixing the light guide plate 40 and the main body 10 may be a fastening member other than a screw, such as a bolt or a nut, or may be a locking structure formed on one or both of the light guide plate 40 and the main body 10.

[0107] In the above embodiment, the light emitting module including the light source 30 and the substrate 20 is an SMD type LED module using an SMD type LED element as the light source 30, but is not limited to this. For example, the light emitting module may be a COB (Chip On Board) type LED module using an LED chip as the light source 30. In this case, the light emitting module is composed of the substrate 20, one or more LED chips (bare chips) directly mounted on the substrate 20, and a sealing member such as a phosphor-containing resin that seals the LED chip.

[0108] In the above embodiment, the light source 30 is configured by an LED, but is not limited to this. For example, the light source 30 may be configured by a semiconductor light emitting element such as a semiconductor laser, an organic EL (Electro Luminescence), an inorganic EL, or other solid-state light emitting element.

[0109] In the above embodiment, the lighting fixture 1 is a ceiling light, but the present invention is not limited to this. The present invention may be applied to lighting fixtures other than ceiling lights as long as the lighting fixture is a light guide type having a light guide plate.

[0110] In addition, the present invention also includes forms obtained by applying various modifications to the above-described embodiments that a person skilled in the art may think of, and forms realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. [Explanation of symbols]

[0111] 1, 1A, 1B, 1C, 1D, 1E Lighting fixtures 10 Main unit 20 Substrate 30 light source 40, 40C, 40D, 40E light guide plate 50 Transducers 60, 60C support member 71, 72 Mounting screws (fixing parts) 90 Transducer mounting material

Claims

1. A lighting fixture, comprising: A plurality of light sources; a substrate on which the plurality of light sources are mounted; a main body to which the substrate is fixed; a light guide plate into which light emitted from the plurality of light sources enters; a fixing member that fixes the light guide plate and the main body; and a vibrator that vibrates a member that constitutes the lighting fixture, The member vibrated by the vibrator has an exposed portion whose front and back surfaces are exposed to the outside. Lighting fixtures.

2. The vibrator is disposed on the light guide plate, The member vibrated by the vibrator is the light guide plate.

2. A lighting fixture according to claim 1.

3. The transducer is disposed closer to the center of the device than the light source.

3. A lighting device according to claim 2.

4. The transducer is installed closer to the center of the instrument than the fixed member.

4. A lighting device according to claim 2 or 3.

5. The light source is located farther from the center of the device than the fixing member. A lighting fixture according to any one of claims 2 to 4.

6. A lighting fixture, comprising: A plurality of light sources; a substrate on which the plurality of light sources are mounted; a main body to which the substrate is fixed; a light guide plate into which light emitted from the plurality of light sources enters; a fixing member that fixes the light guide plate and the main body; and a vibrator that vibrates a member that constitutes the lighting fixture, A slit is provided in the light guide plate at a periphery of the transducer. Lighting fixtures.

7. The slit is located between the vibrator and the fixed member.

7. A lighting device according to claim 6.

8. When the light guide plate is viewed from above, the slit does not exist on an extension line of a line connecting the center of the device and the center of the light source.

8. A lighting device according to claim 6 or 7.

9. a support member for supporting the light guide plate, The vibrator is mounted on the support member, The member vibrated by the vibrator is the support member.

2. A lighting fixture according to claim 1.

10. A lighting fixture, comprising: A plurality of light sources; a substrate on which the plurality of light sources are mounted; a main body to which the substrate is fixed; a light guide plate into which light emitted from the plurality of light sources enters; a fixing member that fixes the light guide plate and the main body; An oscillator that vibrates a member that constitutes the lighting fixture; a transducer mounting member located on a ceiling side relative to the light guide plate, the transducer is mounted on the transducer mounting member, The member vibrated by the vibrator is the vibrator mounting member. Lighting fixtures.

Images