WO2017169549A1

WO2017169549A1 - Illumination apparatus

Info

Publication number: WO2017169549A1
Application number: PCT/JP2017/008891
Authority: WO
Inventors: 隆史新井; 池田　純一; 高明西村
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-03-29
Filing date: 2017-03-07
Publication date: 2017-10-05
Also published as: JP6952291B2; CN108884988B; CN108884988A; JPWO2017169549A1

Abstract

This illumination apparatus (1) is provided with a light source (11); a speaker unit (20) arranged at the side opposite to the light-emitting direction of the light source (11); and an apparatus body (30) for housing the light source (11) and the speaker unit (20). The apparatus body (30) has a bottomed, cylindrical first housing part (31) for supporting the light source (11) therein, and a cylindrical second housing part (32) for housing the first housing part (31) therein. A bottom part (310) of the first housing part (31) is convex facing the speaker unit (20).

Description

lighting equipment

The present invention relates to a luminaire including a speaker unit.

Conventionally, a downlight integrated with a speaker is known (e.g., Patent Document 1). Patent Document 1 discloses a luminaire-mounted speaker 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, the light source is attached in front of the speaker unit, so the sound from the speaker is blocked by the light source and the sound quality is degraded.

Then, an object of the present invention is to provide a luminaire excellent in sound quality.

In order to achieve the above object, a lighting fixture according to one aspect of the present invention includes a light source, a speaker unit disposed on the side opposite to the light emission direction of the light source, and a fixture main body that houses the light source and the speaker unit. And the tool body has a bottomed cylindrical first housing portion for supporting the light source inside, and a cylindrical second housing portion for housing the first housing portion inside. The bottom of the first housing portion is convex toward the speaker unit.

According to the present invention, it is possible to provide a luminaire excellent in sound quality.

FIG. 1 is a perspective view of the lighting apparatus according to the embodiment. FIG. 2 is a bottom view of the lighting apparatus according to the embodiment. FIG. 3 is an exploded perspective view of the lighting apparatus according to the embodiment. FIG. 4 is a cross-sectional perspective view of the lighting apparatus according to the embodiment. FIG. 5 is a cross-sectional view of the luminaire according to the embodiment at line VV of FIG. FIG. 6 is a cross-sectional view of the luminaire according to the embodiment taken along line VI-VI of FIG. FIG. 7 is an exploded perspective view of the lighting unit and the like 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 showing the relationship between the volume of the enclosure unit of the lighting apparatus according to the embodiment, the output sound pressure level, and the impedance. FIG. 10 is a cross-sectional view of an instrument main body according to a modification of the embodiment. FIG. 11 is a diagram showing the frequency characteristic of the output sound pressure level of the sound emitted by the lighting apparatus according to the modification of the embodiment in accordance with 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. Each of the embodiments described below shows a preferable specific example of the present invention. Therefore, numerical values, shapes, materials, components, arrangements 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 components in the following embodiments, components that are not described in the independent claims indicating the highest concept of the present invention are described as optional components.

Further, each drawing is a schematic view, and is not necessarily illustrated exactly. Therefore, for example, the scale and the like do not necessarily match in each figure. Further, in each of the drawings, substantially the same configuration is given the same reference numeral, and overlapping description will be omitted or simplified.

Embodiment
[lighting equipment]
First, an outline of the lighting apparatus according to the present embodiment will be described with reference to FIGS.

FIG. 1 is a perspective view of a luminaire 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 apparatus 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 of FIG. FIG. 6 is a cross-sectional view of the lighting apparatus 1 according to the present embodiment, and shows a cross section (xy cross section) along the line VI-VI in FIG. 6, the mesh member 40 is not shown in order to make the shape of the hole 34 clear.

In each drawing, the direction parallel to the optical axis J is the z-axis direction, and the two directions orthogonal to the optical axis J and orthogonal 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 the direction in which the enclosure portion 35 of the tool body 30 is overhanging. In the present specification, the light emission direction of the lighting device 1 (specifically, the negative side in the z-axis direction) 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, and is embedded in a mounting hole provided in, for example, a ceiling of a building to emit light downward (floor or the like). 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 looking up from diagonally downward.

In the present embodiment, as shown in FIG. 1 and FIG. 2, the lighting fixture 1 includes a lighting unit 10, a fixture body 30, a mesh member 40, and a mounting spring 50. 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 that includes a lighting unit 10 and a speaker unit 20.

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

[Lighting unit]
The lighting unit 10 is a part responsible for the lighting function of the lighting device 1. In the present embodiment, as shown in FIG. 7, the lighting unit 10 includes the light source 11 and emits light vertically downward (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 apparatus 1 according to the present embodiment, mainly showing the lighting unit 10 in an exploded manner. As shown in FIG. 7, the lighting 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 luminaire 1, and is a light emitting unit that emits light of a predetermined color (wavelength) such as white. The light source 11 is attached to the inner bottom surface 310 a of the first casing 31 of the instrument body 30 as shown in FIGS. 4 and 5. The light source 11 is fixed to the inner bottom surface 310 a via the adhesive heat dissipating 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, rectangular, but may be a polygon such as a hexagon or an octagon, or a circle. A metal wire (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, and specifically, 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 in 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 contains, 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 by the LED 111 and the yellow light emitted by the yellow phosphor particles being 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 mounted in the recess (LED 111), and a sealing member (phosphor-containing resin) sealed in the recess. And

The heat dissipating member 12 is an adhesive heat dissipating sheet, or a liquid heat dissipating silicone having excellent heat conductivity. The heat dissipation 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 as shown in FIGS. 4 and 5. The heat radiating member 12 propagates the heat generated by the light source 11 to the first casing 31.

The reflecting member 13 is a member that controls the light distribution of the light 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 substantially at the center.

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

In the present embodiment, the reflection member 13 is fixed to the first housing 31 by screws (not shown). Specifically, as shown in FIG. 4 and FIG. 6, the first housing 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 and fixed to a screw hole (not shown) provided in the reflection member 13. At this time, as shown in FIGS. 4 and 5, the end portion 131 of the reflection member 13 presses the substrate 110, whereby the light source 11 can be prevented from falling.

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

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

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

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

The translucent cover 14 may have a function of controlling and emitting the light distribution of the light having passed through the reflecting member 13. For example, the translucent cover 14 may be a Fresnel lens. In addition, 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 diffusion material is dispersed, or an unevenness or a dot pattern may be formed on the surface.

[Speaker unit]
The speaker unit 20 is a portion responsible for the sound function of the lighting device 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 (positive side in the z-axis direction) opposite to the light emission direction of the light source 11, that is, behind the light source 11. The sound emitted from the speaker unit 20 is transmitted through the hole 34 (see FIGS. 4 and 6) provided between the first housing 31 and the second housing 32 of the tool body 30. Released on the negative side of

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 sheet) 21, a voice coil 22, a damper 23, a yoke 24 having a U-shaped cross section, 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 a sound forward. The diaphragm 21 vibrates in response to the vibration of the voice coil 22. As shown in FIGS. 4 and 5, the diaphragm 21 is exposed to the opening 353 provided in the enclosure portion 35. The sound emitted from the diaphragm 21 is emitted forward from the opening 353, passes through the hole 34 between the first housing 31 and the second housing 32, and the opening of the second housing 32. It is 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 unit 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 the control circuit of the speaker unit 20 is connected via the lead wire.

[Device body]
The fixture body 30 is a body of the lighting fixture 1 and accommodates the light source 11 (the lighting unit 10) and the speaker unit 20. As shown in FIG. 3, the instrument body 30 has a first housing portion 31, a second housing portion 32, a plurality of connection portions 33, and an enclosure portion 35. The instrument body 30 further has a hole 34 provided between the plurality of connections 33 for passing sound from the speaker unit 20.

In the present embodiment, the first housing portion 31, the second housing portion 32, and the plurality of connecting portions 33 are integrally formed (as one component). For example, although the 1st case part 31, the 2nd case part 32, and a plurality of connection parts 33 are aluminum die-casts, they may be formed by press processing etc. The enclosure portion 35 is fixed to the second housing portion 32 by screws 60 shown in FIG.

Below, each component of instrument main part 30 is explained in detail.

[First housing section]
The first housing 31 is a bottomed cylindrical housing that supports the light source 11 inside. In the present embodiment, as shown in FIG. 4, the first housing portion 31 has a bottom portion 310 having a substantially circular shape in a plan view and a cylindrical side wall portion erected on the outer peripheral end of the bottom portion 310 in a plan view. And 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 310 a is a surface on the negative side in the z-axis direction of the bottom portion 310, and the light source 11 is attached. The inner bottom surface 310 a includes a plane (xy plane) substantially orthogonal to the optical axis J, and a hole or the like into which a part of the reflection member 13 of the lighting unit 10 is inserted is provided.

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 in which no other member is disposed is provided between the outer bottom surface 310 b and the speaker unit 20.

The outer bottom surface 310 b has a symmetrical shape with respect to the axis of the speaker unit 20 (ie, the optical axis J). Specifically, in the side view (corresponding to FIG. 5), the outer bottom surface 310b has a shape that is line-symmetrical to the optical axis J. In a top view (corresponding to FIG. 6), the outer bottom surface 310b has a shape that is point symmetric (or rotationally symmetric) 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.

The bottom portion 310 is convex toward the speaker unit 20, as shown in FIG. 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 oval spherical side shape. Also, the outer bottom surface 310 b may have a side shape of a convex polyhedron. Specifically, the outer bottom surface 310 b may be configured of a plurality of planes three-dimensionally arranged to be convex toward the speaker unit 20.

In the present embodiment, the bottom portion 310 is a flat convex whose height is shorter than the width. The height of the bottom portion 310 is a length in the z-axis direction, and is indicated, for example, by the distance between the mounting surface of the light source 11 of the inner bottom surface 310a and the portion closest to the speaker unit 20 of the outer bottom surface 310b. 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 represented, for example, by 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 a through hole 313 which 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 holes 312 may be filled with a resin or the like so that the outer bottom surface 310b becomes smooth after the screw (not shown) is inserted.

The side wall portion 311 is a cylindrical portion having the optical axis J as a central axis and being parallel along the optical axis J. As shown in FIG. 6, a plurality of connecting 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 31 is located approximately at the center of the second housing 32 in the z-axis direction. That is, a space having a predetermined width is provided between the first housing portion 31 and the speaker unit 20, and also between the first housing portion 31 and the opening 323 on the front side of the second housing portion 32. , A space of a predetermined width is provided.

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

The side wall portion 321 forms the outer shell of the tool 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 321. The opening 323 is a substantially circular opening and is formed by the inner periphery of the substantially annular collar portion 322.

As shown in FIG. 6, a plurality of connection 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 side surface of the side wall portion 321.

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

The collar portion 322 is a portion extended outward from the front end of the side wall portion 321 in the xy plane. The ridge portion 322 abuts on the ceiling plate when the lighting fixture 1 is attached to the mounting hole of the ceiling. Specifically, the luminaire 1 is fixed to the mounting hole by sandwiching the ceiling plate with the collar portion 322 and the mounting spring 50.

In the present embodiment, the light emitting direction of the light source 11, the sound emitting direction of the speaker unit 20, the axial direction of the first housing portion 31, and the axial direction of the second housing portion 32 substantially coincide with each other. 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 which 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 32 is a virtual line passing through the center of the substantially circular opening 323 and orthogonal to the opening 323, and substantially coincides with the optical axis J.

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

In the present embodiment, the plurality of connection portions 33 are radially arranged when the second housing portion 32 is viewed in the axial direction (specifically, in a top view or a bottom view). For example, as shown in FIG. 8, fifteen connection portions 33 are radially arranged at equal angles around the optical axis J. Each of the plurality of connection portions 33 connects the first housing portion 31 and the second housing portion 32 at the shortest distance. The number of connection parts 33 may be plural, for example, two.

The plurality of connection portions 33 have the same shape and the same size. Specifically, the connection 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 portion 33 is, for example, a trapezoidal shape.

More specifically, the lower side (lower end) of the connection portion 33 is orthogonal to the optical axis J, and the upper side (upper end) is inclined with respect to the optical axis J. The upper side of the connection portion 33 is inclined downward (i.e., 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 connection portion 33 are equal to or longer than a predetermined length and substantially parallel to the optical axis J. Here, the right side of the connection portion 33 is a portion in contact with the outer side surface 311 a of the first housing portion 31, and the left side is a portion in contact with the inner side surface 321 a of the second housing portion 32. For example, the left side of the connection portion 33 has substantially the same length as the height of the lighting unit 10.

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

[Hole]
The hole 34 is provided to allow sound from the speaker unit 20 located behind the lighting unit 10 (first housing 31) to pass through. That is, the hole 34 functions as a passage of sound. The hole 34 is a through hole communicating the space on the rear side of the first housing 31 in the second housing 32 with the space on the front of the first housing 31 (external space).

As shown in FIG. 6, in the top view, the holes 34 are a plurality of substantially annular spaces between the outer side surface 311 a of the first housing unit 31 and the inner side surface 321 a of the second housing unit 32. Is the space except for the connection part 33 of FIG. The hole 34 is divided into a plurality of partial holes by a plurality of connection portions 33. The partial holes are through holes surrounded by the side surfaces of the two adjacent connection portions 33, the outer surface 311a, and the inner surface 321a.

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

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

FIG. 8 is a partially exploded perspective view of the lighting apparatus 1 according to the present embodiment, mainly showing the enclosure unit 35 in an exploded manner. The enclosure part 35 is provided with the 1st box 351 and the 2nd box 352, as shown in FIG. The first box body 351 is a flat, substantially rectangular box-like box body, and the upper surface thereof is open. The second box body 352 is a flat substantially rectangular box-like box body, and the lower surface is open.

The first box body 351 is provided with an opening 353 for producing a 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 body 351 by a screw (not shown) so as to cover the opening 353.

An insertion hole 354 is provided in the first box body 351. The insertion hole 354 is a through hole into which a lead (not shown) for supplying an input audio signal or the like to the speaker unit 20 is inserted. The said lead wire connects the terminal 26 of the speaker unit 20, and the control circuit (not shown) arrange | positioned to the exterior of the instrument main body 30. As shown in FIG.

The first box body 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 portion 35 to the second housing portion 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. The box 351 (enclosure unit 35) and the second housing unit 32 are fixed.

Further, a screw hole 356 is provided in the first box body 351. The screw holes 356 are holes into which screws (not shown) for fixing the speaker unit 20 to the enclosure unit 35 (first box 351) are 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 unit 35, whereby the speaker unit 20 is fixed to the enclosure unit 35.

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

The size of the space 359, that is, the volume of the enclosure unit 35 is determined in accordance with 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 and the like change.

FIG. 9 is a view showing the relationship between the volume of the enclosure unit 35 of the lighting device 1 according to the present embodiment, the output sound pressure level (SPL; Sound Pressure Level), and the impedance. The solid line and broken line graphs shown in FIG. 9 respectively indicate cases where the volume is 315 cc and 135 cc. 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 the impedance, respectively.

In the present embodiment, by increasing the volume of the enclosure unit 35, the sound pressure level in the low band increases, and the band in the low 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. In addition, the lowest resonance frequency f0 decreased from about 165 Hz to about 140 Hz.

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

The enclosure portion 35 protrudes to the side of the second housing portion 32 when viewed in the axial direction of the second housing portion 32 (specifically, as viewed from below). In the present embodiment, as shown in FIG. 2, the enclosure portion 35 projects in only 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 a mounting hole by letting it pass through a mounting hole from the front-end | tip (positive side of y-axis direction) of the enclosure part 35. FIG.

The enclosure portion 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 351 and the second box 352 may be formed by injection molding using a resin material such as PBT.

In addition, the enclosure part 35 may project in the 2 or more direction of the side of the 2nd housing | casing part 32 in lower surface view.

[Mesh member]
The mesh member 40 is an annular mesh cover provided 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 matter such as dust from entering the space between the speaker unit 20 and the first housing 31 from the outside through the hole 34. The mesh member 40 has a plurality of pores arranged in a two-dimensional manner, and allows the sound emitted from the speaker unit 20 to pass through the holes 34.

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

[Mounting spring]
The attachment spring 50 is used to attach the luminaire 1 to an attachment hole such as a ceiling. Specifically, the lighting fixture 1 can be mounted by holding the ceiling plate between the mounting spring 50 and the hook portion 322 of the tool main body 30 using the restoring force of the mounting spring 50.

The mounting spring 50 is formed into a long thin plate shape by press processing or the like 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 position of the attachment springs 50 are not limited thereto.

[Effect, 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 to 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. And 30. The instrument body 30 has a bottomed cylindrical first housing 31 that supports the light source 11 therein, and a cylindrical second housing 32 that houses the first housing 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 stagnant 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 310 b of the bottom 310 and is smoothly emitted forward. Therefore, the sound quality of the lighting fixture 1 can be improved.

Further, for example, an outer bottom surface 310 b which is a surface on the side of the speaker unit 20 of the bottom portion 310 has a shape symmetrical 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 310 b of the bottom portion 310 and is smoothly emitted forward. Therefore, the sound quality of the lighting fixture 1 can be improved.

Also, for example, the outer bottom surface 310 b has a side shape of a sphere, an ellipsoid or a convex polyhedron.

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

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 portion 31, and the axial direction of the second housing portion 32 substantially coincide with each other.

As a result, since the axes of the light source 11, the speaker unit 20, the first housing portion 31, and the second housing portion 32 substantially coincide with each other as the optical axis J, the surroundings are evenly illuminated without being equalized. Sound can be output.

Also, 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 with 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 enhanced.

(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 luminaire 401 according to the present modification. Specifically, FIG. 10 shows a cross section corresponding to the line VV in FIG. 2 as in FIG.

A luminaire 401 according to the present modification is different from the luminaire 1 shown in FIG. 5 in that a slope portion 460 is newly provided. Specifically, the lighting fixture 401 includes a fixture body 430 having a slope 460 instead of the fixture body 30. In the following, differences from the above embodiment will be mainly described, and the description of the common points will be omitted or simplified.

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

The inclined portion 460 is inclined from the end on the light emission side of the speaker unit 20 to the inner surface of the second housing portion 32. Specifically, the sloped portion 460 has a curved surface 461 that is convexly curved toward the speaker unit 20. The inclined portion 460 is configured in a tubular shape (a mortar or bowl shape without a bottom) in which 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. The inclined portion 460 is, for example, annularly provided over the entire periphery 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, a spherical surface or an elliptical spherical surface. For example, in the yz cross section as shown in FIG. 10, the curved surface 461 is an arc, and specifically, it is an arc of a quadrant, but it is not limited thereto.

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

As described above, the lighting apparatus 401 according to the present modification includes the inclined portion 460 which is inclined from the end portion on the light emission side of the speaker unit 20 to the inner surface of the second housing portion 32. Also, 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 showing the frequency characteristic of the output sound pressure level of the sound emitted by the lighting fixture 401 according to the present modification, in accordance with the presence or absence of the inclined portion 460. As shown in FIG. In FIG. 11, the horizontal axis indicates the frequency of the sound output by the speaker unit 20, and the vertical axis indicates the output sound pressure level.

As shown in FIG. 11, when the slope 460 is not provided, a drop (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 is rising at about 7 kHz and about 12 kHz.

As described above, according to the lighting apparatus 401 according to the present modification, since the dip at the predetermined frequency is eliminated, the sound quality of the sound emitted by the speaker unit 20 can be further improved.

In this modification, although an example in which the inclined portion 460 has the curved surface 461 is shown, 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 side surface shape of a truncated cone. That is, in the yz cross section shown in FIG. 10, the inner surface of the inclined portion 460 may be a straight line intersecting with the y axis and the z axis.

Moreover, although the enclosure part 435 showed the example provided with the inclination part 460 in this modification, it does not restrict to this. The inclined portion 460 may be integrally formed with the second housing portion 32. Alternatively, the inclined portion 460 may be formed separately (separate component) for any of the enclosure portion 435, the first housing portion 31, the second housing portion 32, and the connection portion 33. For example, the inclined portion 460 may be formed by applying an adhesive resin material to the enclosure portion 435 and curing the same so as to surround the periphery of the speaker unit 20.

(Others)
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, although the above-mentioned embodiment showed an example in which a radiation fin was not provided in bottom 310, it does not restrict to this. For example, when the height of the luminaire 1 is not limited, the bottom portion 310 may be provided with one or more radiation fins.

Further, for example, in the above-described embodiment, although the bottom portion 310 is illustrated as being convex toward the speaker unit 20, the present invention is not limited to this. The outer bottom surface 310 b of the bottom portion 310 may be a plane orthogonal to the optical axis J. Further, as in the screw hole 312 and the insertion hole 313, a recess or a through hole may be partially provided.

Further, for example, in the above-described embodiment, although the example in which the enclosure portion 35 protrudes laterally in the bottom view, the present invention is not limited thereto. For example, when the height of the luminaire 1 is not limited, the enclosure portion 35 may extend upward without projecting laterally.

Further, for example, in the above embodiment, although the light source 11 includes the LED 111, the present invention is not limited thereto. The light source 11 may include an organic electro luminescence (EL) element, a laser element, or the like.

Further, for example, in the above-described embodiment, although the example in which the lighting fixture 1 is a ceiling-embedded lighting fixture such as a downlight has been shown, the present invention is not limited to this. 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 wireless communication. For example, the lighting device 1 communicates with a portable 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 via wireless communication, for example, and can illuminate or emit sound based on the received signal.

In addition, the present invention can be realized by arbitrarily combining the components and functions in each embodiment within the scope obtained by applying various modifications that those skilled in the art would think to each embodiment, and the scope of the present invention. The form is also included in the present invention.

DESCRIPTION OF

SYMBOLS

1, 401 Lighting fixtures 11 Light source 20

Speaker unit

30, 430 Fixture main body 31 1st housing | casing part 32 2nd housing | casing part 310 Bottom part 310b Outer bottom face 460 Inclination part 461 Curved surface

Claims

Light source,
A speaker unit disposed on the side opposite to the light emission direction of the light source;
An instrument body for housing the light source and the speaker unit;
The device body is
A bottomed cylindrical first housing portion supporting the light source inside;
And a cylindrical second housing portion for housing the first housing portion inside;
The bottom of the first housing portion is convex toward the speaker unit.
The lighting fixture according to claim 1, wherein a bottom surface, which is a surface on the side of the speaker unit of the bottom portion, has a symmetrical shape with respect to an axis of the speaker unit.
The luminaire according to claim 2, wherein the bottom surface has a side shape of a sphere, an ellipsoid or a convex polyhedron.
The lighting device according to claim 1, wherein the bottom portion is a flat convex having a height shorter than a width.
The illumination according to claim 1, wherein the light emission direction of the light source, the sound emission direction of the speaker unit, the axial direction of the first housing portion, and the axial direction of the second housing portion substantially coincide with each other. Appliance.
further,
The lighting fixture according to claim 1, further comprising an inclined portion which is inclined from an end portion on the light emission side of the speaker unit to an inner surface of the second housing portion.
The lighting device 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 any one of claims 1 to 7, wherein the lighting fixture is a ceiling-embedded lighting fixture.