JPWO2017169549A1 - lighting equipment - Google Patents

Abstract

  The lighting fixture (1) includes a light source (11), a speaker unit (20) disposed on the opposite side of the light emission direction of the light source (11), and a device that houses the light source (11) and the speaker unit (20). A main body (30), and the instrument main body (30) includes a bottomed cylindrical first housing portion (31) and a first housing portion (31) for supporting the light source (11) therein. It has a cylindrical second housing part (32) to be housed, and the bottom part (310) of the first housing part (31) is convex toward the speaker unit (20).

Description

  The present invention relates to a lighting fixture including a speaker unit.

  Conventionally, a downlight integrated with a speaker is known (for example, Patent Document 1). Patent Document 1 discloses a speaker with a lighting fixture in which a light source is attached in front of a speaker unit.

International Publication No. 2010/071102

  However, in the conventional speaker with a lighting fixture, since the light source is attached in front of the speaker unit, the sound from the speaker is blocked by the light source and the sound quality is deteriorated.

  Then, an object of this invention is to provide the lighting fixture excellent in sound quality.

  In order to achieve the above object, a lighting fixture according to an aspect of the present invention includes a light source, a speaker unit disposed on the opposite side of the light emission direction of the light source, and a fixture body that houses the light source and the speaker unit. The instrument main body has a bottomed cylindrical first housing portion that supports the light source therein, and a cylindrical second housing portion that houses the first housing portion therein. And the bottom part of the said 1st housing | casing part is convex toward the said speaker unit.

  ADVANTAGE OF THE INVENTION According to this invention, the lighting fixture excellent in sound quality can be provided.

FIG. 1 is a perspective view of a lighting apparatus according to an embodiment. FIG. 2 is a bottom view of the lighting fixture according to the embodiment. FIG. 3 is an exploded perspective view of the lighting fixture according to the embodiment. FIG. 4 is a cross-sectional perspective view of the lighting fixture according to the embodiment. FIG. 5 is a cross-sectional view of the luminaire according to the embodiment taken along line V-V in FIG. 2. 6 is a cross-sectional view of the lighting apparatus according to the embodiment taken along the line VI-VI in FIG. 5. FIG. 7 is an exploded perspective view of the lighting unit of the lighting fixture according to the embodiment. FIG. 8 is an exploded perspective view of the enclosure portion and the like of the lighting fixture according to the embodiment. FIG. 9 is a diagram illustrating the relationship between the volume of the enclosure portion of the lighting fixture according to the embodiment, the output sound pressure level, and the impedance. FIG. 10 is a cross-sectional view of an instrument body according to a modification of the embodiment. FIG. 11 is a diagram illustrating the frequency characteristics of the output sound pressure level of the sound emitted by the lighting apparatus according to the modification of the embodiment, depending on the presence or absence of the inclined portion.

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

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

(Embodiment)
[lighting equipment]
First, the outline | summary of the lighting fixture which concerns on this Embodiment is demonstrated using FIGS.

  FIG. 1 is a perspective view of a lighting fixture 1 according to the present embodiment. FIG. 2 is a bottom view of the lighting fixture 1 according to the present embodiment. FIG. 3 is an exploded perspective view of the lighting fixture 1 according to the present embodiment. FIG. 4 is a cross-sectional perspective view of the lighting fixture 1 according to the present embodiment. FIG. 5 is a cross-sectional view of the lighting fixture 1 according to the present embodiment. 4 and 5 show a cross section (yz cross section) taken along the line VV in FIG. FIG. 6 is a cross-sectional view of the lighting fixture 1 according to the present embodiment, and shows a cross section (xy cross section) taken along line VI-VI in FIG. In FIG. 6, the mesh member 40 is not shown in order to clarify the shape of the hole 34.

  In each figure, the direction parallel to the optical axis J is the z-axis direction, the two directions perpendicular to the optical axis J and perpendicular to each other are the x-axis direction and the y-axis direction. In the present embodiment, the z-axis direction is, for example, the vertical direction. The y-axis direction is a direction in which the enclosure part 35 of the instrument body 30 projects. In the present specification, the light emission direction (specifically, the negative side in the z-axis direction) of the luminaire 1 is described as “front”, and the opposite side is described as “rear”.

  The luminaire 1 is an example of an embedded luminaire such as a downlight. The luminaire 1 is embedded in a mounting hole provided in a ceiling of a building, for example, and irradiates light downward (such as a floor). The diameter of the mounting hole is, for example, 100 mm, but is not limited thereto. In addition, FIG. 1 has shown the lighting fixture 1 when it looks up from diagonally downward.

  In this Embodiment, as shown in FIG.1 and FIG.2, the lighting fixture 1 is provided with the lighting unit 10, the fixture main body 30, the mesh member 40, and the attachment spring 50. As shown in FIG. Furthermore, as shown in FIGS. 3 to 5, the lighting fixture 1 includes a speaker unit 20 located behind the lighting unit 10. The lighting fixture 1 is a speaker-integrated lighting fixture including a lighting unit 10 and a speaker unit 20.

  Hereinafter, each component (component) of the lighting fixture 1 will be described in detail. In addition, although detailed description is abbreviate | omitted except for one part, the fixing members, such as the latching | locking part or screw for connecting and fixing component members, are suitably provided in the lighting fixture 1.

[Lighting unit]
The lighting unit 10 is a part that bears the lighting function of the lighting fixture 1. In the present embodiment, as shown in FIG. 7, the illumination unit 10 includes a light source 11 and emits light vertically downward (a negative side in the z-axis direction). That is, in the present embodiment, the light emission direction of the light source 11 is the negative side in the z-axis direction.

  FIG. 7 is a partially exploded perspective view of the lighting fixture 1 according to the present embodiment, and mainly shows the lighting unit 10 in an exploded manner. As shown in FIG. 7, the illumination unit 10 includes a light source 11, a heat radiating member 12, a reflecting member 13, and a translucent cover 14.

  The light source 11 is an example of a light source in the lighting fixture 1 and is a light emitting unit that emits light of a predetermined color (wavelength) such as white. As shown in FIGS. 4 and 5, the light source 11 is attached to the inner bottom surface 310 a of the first housing portion 31 of the instrument main body 30. The light source 11 is fixed to the inner bottom surface 310a through the adhesive heat radiating member 12.

  As shown in FIG. 7, the light source 11 is an LED module including a substrate 110 and a plurality of LEDs 111. The light source 11 is a so-called COB (Chip On Board) module in which a bare chip (LED 111) is directly mounted on the substrate 110.

  As the substrate 110, for example, a ceramic substrate, a resin substrate, a metal base substrate, or the like can be used. The planar view shape of the substrate 110 is, for example, a rectangle, but may be a polygon such as a hexagon or an octagon, or a circle. Metal wiring (not shown) is formed on the substrate 110 to electrically connect the plurality of LEDs 111.

  The LED 111 is an example of a light emitting element, and is a semiconductor light emitting element that emits light with a predetermined power. The LED 111 is, for example, a bare chip that emits monochromatic visible light. Specifically, the LED 111 is a blue light emitting LED chip that emits blue light when energized. The plurality of LEDs 111 are arranged in a plurality of rows or a matrix on the main surface of the substrate 110.

  The plurality of LEDs 111 are collectively sealed by a sealing member (not shown). For example, the plurality of LEDs 111 may be collectively sealed for each element row, or all the LEDs 111 on the substrate 110 may be collectively sealed.

The sealing member includes, for example, a translucent resin material such as silicone resin as a main component, and includes a wavelength conversion material that converts the wavelength of light from the LED 111. The wavelength conversion material is, for example, phosphor particles, and specifically, yellow phosphor particles. In the present embodiment, the light source 11 emits white light by mixing the blue light emitted from the LED 111 and the yellow light emitted when the yellow phosphor particles are excited by the blue light. The sealing member may contain a light diffusing material (light scattering particles) such as silica (SiO ₂ ).

  The light source 11 may be an SMD (Surface Mounted Device) type module. Specifically, a package type LED element (SMD type LED element) may be mounted on the substrate 110. The package-type LED element includes, for example, a resin container having a recess (cavity), an LED chip (LED 111) mounted in the recess, and a sealing member (phosphor-containing resin) sealed in the recess. With.

  The heat radiating member 12 is an adhesive heat radiating sheet or a liquid heat radiating silicone excellent in thermal conductivity. As shown in FIGS. 4 and 5, the heat radiating member 12 fixes the light source 11 to the first housing portion 31 by bonding the substrate 110 and the inner bottom surface 310 a. The heat radiating member 12 propagates the heat generated by the light source 11 to the first housing portion 31.

  The reflection member 13 is a member that controls light distribution from the light source 11. In the present embodiment, the reflecting member 13 reflects the light from the light source 11 toward the translucent cover 14. The reflecting member 13 is a substantially cylindrical body provided with an opening through which the optical axis J passes through substantially the center.

  Specifically, as shown in FIGS. 4 and 5, the reflecting member 13 emits the light from an end portion 131 on the side where light from the light source 11 is incident (positive side in the z-axis direction). The inner diameter is formed so as to gradually increase toward the end portion 132 on the side. The inner surface 133 of the reflecting member 13 is a reflecting surface that reflects light from the light source 11.

  In the present embodiment, the reflecting member 13 is fixed to the first housing portion 31 with a screw (not shown). Specifically, as shown in FIGS. 4 and 6, the first casing portion 31 is provided with a screw hole 312 provided so as to penetrate the bottom portion 310. A screw (not shown) is inserted into the screw hole 312 from the rear of the bottom portion 310 and screwed into a screw hole (not shown) provided in the reflecting member 13 to be fixed. At this time, as shown in FIGS. 4 and 5, the end 131 of the reflecting member 13 presses the substrate 110, whereby the light source 11 can be prevented from falling.

  The reflecting member 13 is formed using a hard white resin material such as polybutylene terephthalate (PBT). At this time, a metal reflecting film such as aluminum may be provided on the inner surface of the reflecting member 13.

  The translucent cover 14 is a translucent member into which light from the reflecting member 13 is incident. As shown in FIGS. 4 and 5, the translucent cover 14 is disposed so as to cover the opening on the light emitting side (the negative side in the z-axis direction) of the reflecting member 13.

  The translucent cover 14 is formed from a material having translucency. The translucent cover 14 is formed from a transparent resin material such as acrylic (PMMA) or polycarbonate (PC). Alternatively, the translucent cover 14 may be formed from a transparent glass material.

  The translucent cover 14 is supported by the reflecting member 13. Specifically, as shown in FIG. 7, the reflection member 13 is provided with two claw portions 134. The translucent cover 14 is provided with a recess (not shown) that is engaged with each of the two claw portions 134. The translucent cover 14 is supported by the reflecting member 13 by the concave portion engaging with the claw portion 134.

  The translucent cover 14 may have a function of controlling and emitting the light distribution of the light that has passed through the reflecting member 13. For example, the translucent cover 14 may be a Fresnel lens. The translucent cover 14 may have a light diffusion (scattering) structure. For example, the translucent cover 14 may be formed using a resin material in which a diffusing material is dispersed, or an unevenness or a dot pattern may be formed on the surface.

[Speaker unit]
The speaker unit 20 is a part that bears the acoustic function of the lighting fixture 1. In the present embodiment, the speaker unit 20 emits various sounds such as music, voice, and warning sound. The sound output direction of the speaker unit 20 is on the negative side in the z-axis direction and substantially coincides with the light emission direction of the light source 11.

  In the present embodiment, the speaker unit 20 is disposed on the side opposite to the light emission direction of the light source 11 (the positive side in the z-axis direction), that is, behind the light source 11. The sound emitted from the speaker unit 20 is transmitted in the z-axis direction through a hole 34 (see FIGS. 4 and 6) provided between the first housing portion 31 and the second housing portion 32 of the instrument body 30. Is released on the negative side.

  The speaker unit 20 is, for example, a cone type speaker unit. Specifically, as shown in FIGS. 4 and 5, the speaker unit 20 includes a diaphragm (cone paper) 21, a voice coil 22, a damper 23, a U-shaped yoke 24, and a frame 25. , A terminal 26, a magnet 27, and a plate 28.

  In the speaker unit 20, the diaphragm 21 vibrates to emit sound forward. The diaphragm 21 vibrates according to the vibration of the voice coil 22. As shown in FIGS. 4 and 5, the diaphragm 21 is exposed to an opening 353 provided in the enclosure part 35. The sound emitted by the diaphragm 21 is emitted forward from the opening 353, passes through the hole 34 between the first housing portion 31 and the second housing portion 32, and opens in the second housing portion 32. Released from H.323.

  The voice coil 22 vibrates based on the input audio signal received by the terminal 26. The damper 23 supports the voice coil 22 and transmits the vibration of the voice coil 22 to the diaphragm 21. The yoke 24, the magnet 27, and the plate 28 are part of the magnetic circuit of the speaker unit 20, and vibrate the voice coil 22 based on the input audio signal received by the terminal 26.

  The frame 25 is a frame for attaching the speaker unit 20 to the enclosure part 35. As shown in FIG. 4, the frame 25 is provided with a plurality of screw holes 251 (specifically, four). A lead wire (not shown) is connected to the terminal 26, and a control circuit of the speaker unit 20 is connected through the lead wire.

[Equipment body]
The fixture body 30 is the main body of the lighting fixture 1 and houses the light source 11 (lighting unit 10) and the speaker unit 20. As shown in FIG. 3, the instrument main body 30 includes a first housing part 31, a second housing part 32, a plurality of connection parts 33, and an enclosure part 35. The instrument body 30 further includes a hole 34 that is provided between the plurality of connecting portions 33 and allows sound from the speaker unit 20 to pass therethrough.

  In the present embodiment, the first housing part 31, the second housing part 32, and the plurality of connection parts 33 are integrally formed (as one component). For example, the first housing part 31, the second housing part 32, and the plurality of connection parts 33 are made of aluminum die casting, but may be formed by press working or the like. The enclosure part 35 is fixed to the second housing part 32 by screws 60 shown in FIG.

  Below, each component of the instrument body 30 will be described in detail.

[First housing part]
The 1st housing | casing part 31 is a bottomed cylindrical housing | casing part which supports the light source 11 inside. In the present embodiment, as shown in FIG. 4, the first housing portion 31 includes a bottom portion 310 having a substantially circular shape in plan view, and a cylindrical side wall portion erected on the outer peripheral end of the bottom portion 310 in plan view. 311.

  As shown in FIGS. 4 and 5, the bottom portion 310 has an inner bottom surface 310a and an outer bottom surface 310b.

  The inner bottom surface 310a is a negative surface of the bottom portion 310 in the z-axis direction, and the light source 11 is attached to the inner bottom surface 310a. The inner bottom surface 310a includes a plane (xy plane) substantially orthogonal to the optical axis J, and is provided with a hole into which a part of the reflection member 13 of the illumination unit 10 is inserted.

  The outer bottom surface 310 b is a surface on the positive side in the z-axis direction of the bottom portion 310 and faces the speaker unit 20. A space where no other member is arranged is provided between the outer bottom surface 310b and the speaker unit 20.

  The outer bottom surface 310b has a symmetrical shape with respect to the axis of the speaker unit 20 (that is, the optical axis J). Specifically, the outer bottom surface 310b has a line-symmetric shape with respect to the optical axis J in a side view (corresponding to FIG. 5). When viewed from above (corresponding to FIG. 6), the outer bottom surface 310b has a point-symmetric (or rotationally symmetric) shape with respect to the optical axis J. As shown in FIG. 6, the bottom portion 310 is provided with an insertion hole 313 through which a lead wire for supplying power to the light source 11 is inserted. Except for the insertion hole 313, the outer bottom surface 310b has a symmetrical shape with respect to the optical axis J.

  As shown in FIG. 5, the bottom portion 310 is convex toward the speaker unit 20. That is, the outer bottom surface 310 b of the bottom portion 310 is a surface formed in a convex shape toward the speaker unit 20.

  For example, the outer bottom surface 310b has a spherical side shape. That is, the outer bottom surface 310b is a spherical surface. Alternatively, the outer bottom surface 310b may have an elliptical side surface shape. The outer bottom surface 310b may have a convex polyhedral side surface shape. Specifically, the outer bottom surface 310b may be composed of a plurality of planes arranged in a three-dimensional manner so as to protrude toward the speaker unit 20.

  In the present embodiment, the bottom 310 is a flat protrusion whose height is shorter than the width. The height of the bottom portion 310 is the length in the z-axis direction, and is indicated, for example, by the distance between the mounting surface of the light source 11 on the inner bottom surface 310a and the portion of the outer bottom surface 310b closest to the speaker unit 20. In the present embodiment, the portion on the optical axis J of the outer bottom surface 310 b is the portion closest to the speaker unit 20. That is, the height of the bottom portion 310 is expressed by, for example, the length from the inner bottom surface 310a to the outer bottom surface 310b on the optical axis J. The width of the bottom 310 is, for example, the maximum width of the bottom 310 in the xy plane.

  As shown in FIG. 6, the bottom portion 310 is provided with two screw holes 312 and an insertion hole 313 that penetrate the bottom portion 310 in the thickness direction (z-axis direction). The two screw holes 312 are holes into which screws (not shown) for fixing the reflecting member 13 of the lighting unit 10 are inserted. The screw hole 312 may be filled with a resin or the like so that the outer bottom surface 310b becomes smooth after a screw (not shown) is inserted.

  The side wall portion 311 is a cylindrical portion having the optical axis J as a central axis and parallel to the optical axis J. As shown in FIG. 6, a plurality of connection portions 33 are connected to the outer side surface 311 a of the side wall portion 311.

  In the present embodiment, as shown in FIG. 5, the first housing part 31 is located substantially at the center of the second housing part 32 in the z-axis direction. That is, a space having a predetermined width is provided between the first housing part 31 and the speaker unit 20, and also between the first housing part 31 and the opening 323 on the front side of the second housing part 32. A space having a predetermined width is provided.

[Second casing]
The second housing portion 32 is a cylindrical housing portion that houses the first housing portion 31 therein. In the present embodiment, as shown in FIGS. 4 to 6, the second housing portion 32 is provided at the cylindrical side wall portion 321 and the end portion on the front side (the negative side in the z-axis direction) of the side wall portion 321. And a flange portion 322 having a substantially annular shape in plan view.

  The side wall portion 321 forms an outline of the instrument main body 30. As shown in FIGS. 4 and 5, an opening 323 for emitting light from the illumination unit 10 is provided on the front side of the side wall portion 321. The opening 323 is a substantially circular opening, and is formed by the inner periphery of a substantially ring-shaped flange portion 322.

  As shown in FIG. 6, a plurality of connecting portions 33 are connected to the inner side surface 321 a of the side wall portion 321. Three attachment springs 50 are fixed to the outer surface of the side wall portion 321.

  Although not shown, the side wall 321 is provided with an insertion hole through which a lead wire for supplying power to the light source 11 of the illumination unit 10 is inserted. The lead wire is inserted into the insertion hole provided in the side wall portion 321 and the insertion hole 313 provided in the first housing portion 31 to electrically connect the external power supply circuit and the light source 11.

  The flange portion 322 is a portion that extends outward from the front end portion of the side wall portion 321 in the xy plane. The collar part 322 contacts the ceiling plate when the lighting fixture 1 is attached to the attachment hole of the ceiling. Specifically, the lighting fixture 1 is fixed to the mounting hole by the flange 322 and the mounting spring 50 sandwiching the ceiling plate.

  In the present embodiment, the light emission direction of the light source 11, the sound output direction of the speaker unit 20, the axial direction of the first housing part 31, and the axial direction of the second housing part 32 are substantially the same. Specifically, the sound output direction of the speaker unit 20 is an imaginary line passing through the center of the cone-shaped diaphragm 21 and substantially coincides with the optical axis J. The axis of the first housing portion 31 is an imaginary line that passes through the center of the substantially circular bottom portion 310 and is perpendicular to the inner bottom surface 310 a and substantially coincides with the optical axis J of the light source 11. The axis of the second housing portion 32 is a virtual line that passes through the center of the substantially circular opening 323 and is orthogonal to the opening 323, and substantially coincides with the optical axis J.

[Connection (radiating fin)]
The plurality of connecting portions 33 are portions that connect the outer side surface 311 a of the first casing portion 31 and the inner side surface 321 a of the second casing portion 32. Specifically, each of the plurality of connection portions 33 is a plate-like heat radiation fin parallel to the axial direction (optical axis J) of the first housing portion 31. The plurality of connecting portions 33 dissipate the heat generated by the light source 11 housed in the first housing portion 31 from the first housing portion 31 to the second housing portion 32 to the outside. The plurality of connection portions 33 support the first housing portion 31 in the second housing portion 32. As described above, the plurality of connecting portions 33 realize both functions of heat dissipation from the light source 11 and support of the light source 11 (first housing portion 31).

  In the present embodiment, the plurality of connection portions 33 are arranged radially when the second housing portion 32 is viewed in the axial direction (specifically, when viewed from the top or the bottom). For example, as shown in FIG. 8, fifteen connecting portions 33 are arranged radially at an equal angle with the optical axis J as the center. Each of the plurality of connection portions 33 connects the first housing portion 31 and the second housing portion 32 with the shortest distance. Note that the number of connection portions 33 may be a plurality, for example, two.

  The plurality of connecting portions 33 have the same shape and the same size. Specifically, the connecting portion 33 has a flat plate shape parallel to the optical axis J. As shown in FIG. 5, the cross-sectional shape (front view shape) orthogonal to the thickness direction of the connection part 33 is a trapezoid, for example.

  More specifically, the connection portion 33 has a lower side (lower end) orthogonal to the optical axis J and an upper side (upper end) inclined with respect to the optical axis J. The upper side of the connection portion 33 is inclined downward (ie, in a direction away from the speaker unit 20) as it approaches the second housing portion 32 from the first housing portion 31. The right side (right end) and the left side (left end) of the connecting portion 33 are not less than a predetermined length and are substantially parallel to the optical axis J. Here, the right side of the connecting portion 33 is a portion in contact with the outer side surface 311 a of the first casing portion 31, and the left side is a portion in contact with the inner side surface 321 a of the second casing portion 32. For example, the left side of the connecting portion 33 has substantially the same length as the height of the lighting unit 10.

  In addition, in this Embodiment, although the connection part 33 showed about the example which is a trapezoid flat plate part, it is not restricted to this. The connecting portion 33 may be a rectangular or square flat plate portion. Alternatively, the upper side or the lower side of the connecting portion 33 may be a curve.

[Hole]
The hole 34 is provided to allow sound from the speaker unit 20 located behind the illumination unit 10 (first housing portion 31) to pass therethrough. That is, the hole 34 functions as a passage for sound. The hole 34 is a through-hole that communicates a space behind the first housing 31 in the second housing 32 and a space (external space) ahead of the first housing 31.

  As shown in FIG. 6, the hole portion 34 includes a plurality of holes in a substantially annular space between the outer surface 311 a of the first housing portion 31 and the inner surface 321 a of the second housing portion 32 in a top view. This is a space excluding the connecting portion 33. The hole portion 34 is divided into a plurality of partial holes by a plurality of connection portions 33. The partial hole is a through hole surrounded by the side surfaces of the two adjacent connecting portions 33, the outer side surface 311 a, and the inner side surface 321 a.

  In the present embodiment, when the second housing portion 32 is viewed in the axial direction (from a top view or a bottom view), the opening area of the hole 34 is 30 of the opening area of the opening 323 of the second housing portion 32. % Or more. Since the hole 34 is provided in order to allow the sound from the speaker unit 20 to pass through, the sound quality of the lighting fixture 1 can be improved when the opening area is large. Therefore, for example, the opening area of the hole 34 may be 50% or more of the opening area of the opening 323, and preferably 60% or more.

[Enclosure]
The enclosure unit 35 is a housing unit that houses the speaker unit 20. The enclosure part 35 is fixed to the second casing part 32 so that the speaker unit 20 emits sound toward the bottom part 310 of the first casing part 31. Specifically, the enclosure part 35 is fixed to the second housing part 32 by screws 60.

  FIG. 8 is a partially exploded perspective view of the lighting fixture 1 according to the present embodiment, and mainly shows the enclosure part 35 in an exploded manner. As shown in FIG. 8, the enclosure unit 35 includes a first box 351 and a second box 352. The first box 351 is a flat, substantially rectangular parallelepiped box, and the upper surface is open. The second box 352 is a flat, substantially rectangular parallelepiped box, and the lower surface is opened.

  The first box 351 is provided with an opening 353 for outputting sound from the speaker unit 20. The opening 353 is a substantially circular opening through which the optical axis J passes. The speaker unit 20 is fixed to the first box 351 with screws (not shown) so as to cover the opening 353.

  The first box body 351 is provided with an insertion hole 354. The insertion hole 354 is a through hole through which a lead wire (not shown) for supplying an input audio signal or the like to the speaker unit 20 is inserted. The lead wire connects the terminal 26 of the speaker unit 20 and a control circuit (not shown) disposed outside the instrument body 30.

  The first box 351 is provided with a screw hole 355. The screw hole 355 is a through hole through which a screw 60 for fixing the enclosure part 35 to the second housing part 32 is inserted. Specifically, as shown in FIG. 3, the screw 60 is inserted into the screw hole 355 and screwed into a screw hole (not shown) provided in the upper portion of the second housing portion 32, so that the first The box body 351 (enclosure part 35) and the second housing part 32 are fixed.

  In addition, the first box body 351 is provided with a screw hole 356. The screw hole 356 is a hole into which a screw (not shown) for fixing the speaker unit 20 to the enclosure part 35 (first box body 351) is screwed. Specifically, a screw (not shown) is inserted into the screw hole 251 of the speaker unit 20 and screwed into the screw hole 356 of the enclosure part 35, so that the speaker unit 20 is fixed to the enclosure part 35.

  The first box 351 and the second box 352 are fixed by screws 36. Specifically, as shown in FIG. 8, the first box 351 is provided with four screw holes 357, and the second box 352 is provided with four screw holes 358. The screw 36 is inserted into the screw hole 358 of the second box 352 and screwed into the screw hole 357 of the first box 351, so that the first box 351 and the second box 352 are fixed, A space 359 is formed inside. In this manner, the first box 351 and the second box 352 are combined to form a space 359 that contains the sound on the rear side from the speaker unit 20.

  The size of the space 359, that is, the volume of the enclosure part 35 is determined according to the output of the speaker unit 20. By changing the volume of the enclosure unit 35, the sound pressure of the sound output from the speaker unit 20 is changed.

  FIG. 9 is a diagram illustrating a relationship between the volume of the enclosure unit 35 of the lighting fixture 1 according to the present embodiment, the output sound pressure level (SPL), and the impedance. The solid and broken line graphs shown in FIG. 9 indicate cases where the volumes are 315 cc and 135 cc, respectively. In FIG. 9, the horizontal axis indicates the frequency of the sound output from the speaker unit 20, and the left vertical axis and the right vertical axis indicate the output sound pressure level and impedance, respectively.

  In the present embodiment, by increasing the volume of the enclosure part 35, the low-frequency sound pressure level is increased and the low-frequency band is expanded. Specifically, as shown in FIG. 9, the output sound pressure level increased by about 3 dB in the range of 50 Hz to 100 Hz. Further, the lowest resonance frequency f0 decreased from about 165 Hz to about 140 Hz.

  In the present embodiment, the volume of the enclosure part 35 is 250 cc or more, but is not limited to this. The volume of the enclosure part 35 may be 350 cc or more, for example.

  The enclosure part 35 protrudes to the side of the second casing part 32 when viewed in the axial direction of the second casing part 32 (specifically, when viewed from the bottom). In the present embodiment, as shown in FIG. 2, the enclosure part 35 projects only in one direction (specifically, the positive side in the y-axis direction). Thereby, when attaching the lighting fixture 1 to a ceiling etc., the lighting fixture 1 can be inserted in an attachment hole by letting it pass from the front-end | tip (positive side of a y-axis direction) of the enclosure part 35 to an attachment hole.

  The enclosure part 35 is formed using a metal material or a resin material. Specifically, each of the first box body 351 and the second box body 352 is made of aluminum die casting. Alternatively, each of the first box body 351 and the second box body 352 may be formed by injection molding using a resin material such as PBT.

  In addition, the enclosure part 35 may protrude in two or more directions on the side of the second housing part 32 in the bottom view.

[Mesh members]
The mesh member 40 is an annular mesh cover provided so as to cover the lower end of the hole 34. The mesh member 40 is provided on the lower end side of the plurality of connection portions 33. The mesh member 40 is provided to prevent foreign matters such as dust from entering the space between the speaker unit 20 and the first housing part 31 through the hole 34 from the outside. The mesh member 40 has a plurality of fine holes arranged two-dimensionally, and allows the sound emitted from the speaker unit 20 to pass through the hole 34.

  The mesh member 40 is made of, for example, a metal material, a resin material, or a fiber material.

[Mounting spring]
The attachment spring 50 is used for attaching the lighting fixture 1 to an attachment hole such as a ceiling. Specifically, the lighting fixture 1 can be attached by holding the ceiling plate between the attachment spring 50 and the flange 322 of the fixture body 30 using the restoring force of the fixture spring 50.

  The attachment spring 50 is formed into a long and narrow plate shape by press working using a metal material such as iron. In the present embodiment, as shown in FIG. 1, the lighting fixture 1 includes three attachment springs 50, but the number and positions of the attachment springs 50 are not limited to this.

[Effects, etc.]
As described above, the lighting fixture 1 according to the present embodiment includes the light source 11, the speaker unit 20 disposed on the opposite side of the light emission direction of the light source 11, and the fixture main body that houses the light source 11 and the speaker unit 20. 30. The instrument main body 30 includes a bottomed cylindrical first casing portion 31 that supports the light source 11 therein, and a cylindrical second casing portion 32 that stores the first casing portion 31 therein. The bottom portion 310 of the first housing portion 31 is convex toward the speaker unit 20.

  Thereby, the sound emitted from the speaker unit 20 is less likely to be trapped in the space between the bottom portion 310 and the speaker unit 20. Specifically, the sound emitted from the speaker unit 20 is guided to the hole 34 along the outer bottom surface 310b of the bottom 310, and is smoothly discharged forward. Therefore, the sound quality of the lighting fixture 1 can be improved.

  Further, for example, the outer bottom surface 310 b that is the surface of the bottom portion 310 on the speaker unit 20 side has a symmetrical shape with respect to the axis of the speaker unit 20.

  Thereby, the sound emitted from the speaker unit 20 is guided to the hole 34 along the outer bottom surface 310b of the bottom 310, and is smoothly discharged forward. Therefore, the sound quality of the lighting fixture 1 can be improved.

  For example, the outer bottom surface 310b has a side shape of a sphere, an elliptic sphere, or a convex polyhedron.

  Thereby, the sound emitted from the speaker unit 20 is guided to the hole 34 along the outer bottom surface 310b of the bottom 310, and is smoothly discharged forward. Therefore, the sound quality of the lighting fixture 1 can be improved.

  Further, for example, the bottom portion 310 is a flat protrusion whose height is shorter than the width.

  Thereby, the sound emitted from the speaker unit 20 is guided to the hole 34 along the outer bottom surface 310b of the bottom 310, and is smoothly discharged forward. Therefore, the sound quality of the lighting fixture 1 can be improved.

  Further, for example, the light emission direction of the light source 11, the sound output direction of the speaker unit 20, the axial direction of the first housing part 31, and the axial direction of the second housing part 32 are substantially the same.

  Thereby, since each axis | shaft of the light source 11, the speaker unit 20, the 1st housing | casing part 31, and the 2nd housing | casing part 32 substantially corresponds as the optical axis J, the circumference | surroundings are uniformly illuminated without anisotropy. Can output sound.

  For example, the lighting fixture 1 is a ceiling-embedded lighting fixture.

  Thereby, for example, the lighting fixture 1 can be installed on a ceiling or the like as a downlight having a speaker function. Therefore, compared to the case where the speaker and the lighting fixture are individually installed, not only the installation work is facilitated, but also the number of holes provided in the ceiling can be reduced, and the design of the ceiling can be improved.

(Modification)
Here, the modification of the lighting fixture which concerns on the said embodiment is demonstrated.

  FIG. 10 is a cross-sectional view of a lighting fixture 401 according to this modification. Specifically, FIG. 10 shows a cross section corresponding to the line V-V in FIG. 2, similarly to FIG. 5.

  The lighting fixture 401 which concerns on this modification differs in the point provided with the inclination part 460 newly compared with the lighting fixture 1 shown in FIG. Specifically, the lighting fixture 401 includes an appliance main body 430 having an inclined portion 460 instead of the appliance main body 30. Below, it demonstrates centering around difference with said embodiment, and the description about a common point is abbreviate | omitted or simplified.

  As shown in FIG. 10, the instrument main body 430 includes an enclosure part 435. The enclosure part 435 includes a first box body 451 having an inclined part 460. The instrument main body 430, the enclosure part 435, and the first box body 451 have the same functions, materials, and forming methods as the instrument main body 30, the enclosure part 35, and the first box body 351, respectively. The difference is that an inclined portion 460 is provided.

  The inclined part 460 is inclined from the end of the speaker unit 20 on the light emitting side to the inner surface of the second housing part 32. Specifically, the inclined portion 460 has a curved surface 461 that is convexly curved toward the speaker unit 20. The inclined portion 460 is formed in a cylindrical shape (a mortar or bowl-like shape having no bottom) such that the opening width gradually increases in the negative direction of the z-axis. The inner surface of the cylindrical inclined portion 460 is a curved surface 461. For example, the inclined portion 460 is provided in an annular shape over the entire circumference of the speaker unit 20 in a bottom view.

  The curved surface 461 is smoothly curved from the end of the speaker unit 20 to the inner surface of the second housing portion 32. Specifically, the curved surface 461 is a part of a paraboloid of revolution, a spherical surface, or an elliptical spherical surface. For example, in the yz section as shown in FIG. 10, the curved surface 461 is an arc, specifically, a quadrant arc, but is not limited thereto.

  In the present embodiment, the inclined portion 460 is formed integrally with the first box body 451. Specifically, the inclined portion 460 is a part of a first box body 451 made of aluminum die casting. Alternatively, the inclined portion 460 may be a part of the resin first box body 451 integrally formed by injection molding or the like.

  As described above, the lighting fixture 401 according to the present modification includes the inclined portion 460 that is inclined from the light emitting side end of the speaker unit 20 to the inner surface of the second housing portion 32. Further, for example, the inclined portion 460 has a curved surface 461 that is convexly curved toward the speaker unit 20.

  FIG. 11 is a diagram illustrating the frequency characteristics of the output sound pressure level of the sound emitted from the lighting fixture 401 according to the present modification, depending on the presence or absence of the inclined portion 460. In FIG. 11, the horizontal axis indicates the frequency of the sound output from the speaker unit 20, and the vertical axis indicates the output sound pressure level.

  As shown in FIG. 11, when the inclined portion 460 is not provided, a decrease (dip) in the output sound pressure level is confirmed at about 7 kHz and about 12 kHz. On the other hand, the dip is eliminated by providing the inclined portion 460. That is, the output sound pressure level increases at about 7 kHz and about 12 kHz.

  Thus, according to the lighting fixture 401 according to the present modification, the dip at the predetermined frequency is eliminated, so that the sound quality of the sound emitted from the speaker unit 20 can be further improved.

  In the present modification, the example in which the inclined portion 460 has the curved surface 461 is shown, but the present invention is not limited to this. The inclination angle of the inner surface of the inclined portion 460 may be constant. Specifically, the inner surface of the inclined portion 460 may have a truncated cone side shape. That is, in the yz cross section shown in FIG. 10, the inner surface of the inclined portion 460 may be a straight line that intersects the y axis and the z axis.

  Further, in the present modification, the example in which the enclosure part 435 includes the inclined part 460 has been described, but the present invention is not limited thereto. The inclined portion 460 may be formed integrally with the second housing portion 32. Alternatively, the inclined portion 460 may be formed as a separate body (separate part) with respect to any of the enclosure portion 435, the first housing portion 31, the second housing portion 32, and the connecting portion 33. For example, the inclined portion 460 may be formed by applying an adhesive resin material to the enclosure portion 435 and curing it so as to surround the speaker unit 20.

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

  For example, in the above-described embodiment, the example in which the bottom portion 310 is not provided with the heat radiating fins is shown, but the present invention is not limited thereto. For example, when the height of the lighting fixture 1 is not limited, one or more heat radiation fins may be provided on the bottom portion 310.

  For example, in the above-described embodiment, the example in which the bottom portion 310 is convex toward the speaker unit 20 has been described, but the present invention is not limited thereto. The outer bottom surface 310b of the bottom portion 310 may be a plane orthogonal to the optical axis J. Moreover, a recessed part or a through-hole may be partially provided like the screw hole 312 and the insertion hole 313. FIG.

  Further, for example, in the above-described embodiment, the example in which the enclosure part 35 protrudes to the side in the bottom view is shown, but the present invention is not limited to this. For example, when the height of the lighting fixture 1 is not limited, the enclosure part 35 may extend upward without projecting to the side.

  Further, for example, in the above-described embodiment, the example in which the light source 11 includes the LED 111 has been described. The light source 11 may include an organic EL (Electro Luminescence) element or a laser element.

  Moreover, for example, in the above-described embodiment, an example in which the lighting fixture 1 is a ceiling-embedded lighting fixture such as a downlight is shown, but the present invention is not limited thereto. For example, the lighting fixture 1 may be a ceiling light, a spotlight, a floor light, or the like.

  In addition, the lighting fixture 1 which concerns on said embodiment may be provided with the communication part which performs radio | wireless communication. For example, the luminaire 1 communicates with a mobile terminal such as a smartphone or a dedicated terminal by wireless communication such as Bluetooth (registered trademark), Wi-Fi (registered trademark), or ZigBee (registered trademark). Thereby, the lighting fixture 1 can receive the signal of illumination control or acoustic control from a smart phone, for example via wireless communication, and can illuminate or emit a sound based on the received signal.

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

DESCRIPTION OF SYMBOLS 1,401 Lighting fixture 11 Light source 20 Speaker unit 30, 430 Appliance main body 31 1st housing | casing part 32 2nd housing | casing part 310 Bottom part 310b Outer bottom face 460 Inclined part 461 Curved surface

Claims (8)

A light source;
A speaker unit disposed on the side opposite to the light emitting direction of the light source;
An instrument body that houses the light source and the speaker unit;
The instrument body is
A bottomed cylindrical first housing portion that supports the light source therein;
A cylindrical second housing portion that houses the first housing portion therein;
The bottom part of the first housing part is convex toward the speaker unit. The lighting fixture according to claim 1, wherein a bottom surface that is a surface of the bottom portion on the speaker unit side has a symmetrical shape with respect to an axis of the speaker unit. The lighting apparatus according to claim 2, wherein the bottom surface has a side shape of a sphere, an elliptical sphere, or a convex polyhedron. The lighting apparatus according to claim 1, wherein the bottom portion is a flat protrusion whose height is shorter than the width. 2. The illumination according to claim 1, wherein a light emission direction of the light source, a sound output direction of the speaker unit, an axial direction of the first housing part, and an axial direction of the second housing part are substantially the same. Instruments. further,
The lighting fixture according to claim 1, further comprising an inclined portion that is inclined from an end portion of the speaker unit on a light emitting side to an inner surface of the second housing portion. The lighting apparatus according to claim 6, wherein the inclined portion has a curved surface that is convexly curved toward the speaker unit. The lighting fixture according to claim 1, wherein the lighting fixture is a ceiling-embedded lighting fixture.

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