JP6646825B2 - lighting equipment - Google Patents

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 Literature 1 discloses a speaker with a lighting fixture in which a light source is attached in front of a speaker unit.

WO 2010/071022

  However, in the above-mentioned conventional speaker with lighting equipment, since the light source is mounted in front of the speaker unit, the sound from the speaker is blocked by the light source, and the sound quality deteriorates.

  Therefore, an object of the present invention is to provide a lighting fixture having excellent sound quality.

  In order to achieve the above object, a lighting device according to one embodiment of the present invention includes a light source, a speaker unit disposed on a side opposite to a light emission direction of the light source, and a device main body that houses the light source and the speaker unit. Wherein the appliance body includes a bottomed cylindrical first housing portion that supports the light source inside, a cylindrical second housing portion that houses the first housing portion inside, An enclosure for accommodating a speaker unit, wherein the enclosure projects laterally of the second housing when viewed in the axial direction of the second housing.

  According to the present invention, it is possible to provide a lighting fixture having excellent sound quality.

It is a perspective view of the lighting fixture concerning embodiment. It is a bottom view of the lighting fixture concerning embodiment. FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment. It is a sectional perspective view of the lighting fixture concerning an embodiment. It is sectional drawing of the lighting fixture which concerns on embodiment in the VV line | wire of FIG. It is sectional drawing of the lighting fixture which concerns on embodiment in the VI-VI line | wire of FIG. FIG. 3 is an exploded perspective view of a lighting unit and the like of the lighting fixture according to the embodiment. It is an exploded perspective view of the enclosure part etc. of the lighting fixture concerning an embodiment. It is a figure which shows the relationship of the volume of the enclosure part of the lighting fixture which concerns on embodiment, an output sound pressure level, and impedance.

  Hereinafter, a lighting device according to an embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, numerical values, shapes, materials, constituent elements, arrangement and connection forms of constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and do not limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept of the present invention are described as arbitrary components.

  In addition, each drawing is a schematic diagram, and is not necessarily strictly illustrated. Therefore, for example, the scales and the like do not always match in each drawing. Further, in each of the drawings, substantially the same configuration is denoted by the same reference numeral, and redundant description will be omitted or simplified.

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

  FIG. 1 is a perspective view of a lighting fixture 1 according to the present embodiment. FIG. 2 is a bottom view of lighting device 1 according to the present embodiment. FIG. 3 is an exploded perspective view of lighting device 1 according to the present embodiment. FIG. 4 is a sectional perspective view of lighting device 1 according to the present embodiment. FIG. 5 is a cross-sectional view of lighting device 1 according to the present embodiment. 4 and 5 show cross sections (yz cross sections) taken along line VV in FIG. FIG. 6 is a cross-sectional view of lighting device 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 make the shape of the hole 34 clear.

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

  The lighting fixture 1 is an example of a recessed lighting fixture such as a downlight. For example, the lighting fixture 1 is embedded in a mounting hole provided in a ceiling or the like of a building and irradiates light downward (such as a floor). The diameter of the mounting hole is, for example, 100 mm, but is not limited thereto. FIG. 1 shows the lighting apparatus 1 when looking up from obliquely below.

  In this embodiment, as shown in FIGS. 1 and 2, the lighting fixture 1 includes a lighting unit 10, a fixture main body 30, a mesh member 40, and a mounting spring 50. Further, 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 (part) of the lighting fixture 1 will be described in detail. Although a detailed description is omitted except for a part, the lighting fixture 1 is appropriately provided with a locking member for connecting and fixing the constituent members or a fixing member such as a screw.

[Lighting unit]
The lighting unit 10 is a part that performs a lighting function of the lighting fixture 1. In the present embodiment, as shown in FIG. 7, the illumination 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 on 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, and mainly shows 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 lighting fixture 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 310a of the first housing 31 of the instrument body 30, as shown in FIGS. The light source 11 is fixed to the inner bottom surface 310a via the adhesive heat dissipation 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 shape of the substrate 110 in a plan view 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, and the plurality of LEDs 111 are electrically connected.

  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, 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.

  Note that 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 a 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, 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 when the yellow phosphor particles are excited by the blue light. The sealing member may include a light diffusing material (light scattering particles) such as silica (SiO ₂ ).

  Note that the light source 11 may be a 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 concave portion (cavity), an LED chip (LED 111) mounted in the concave portion, and a sealing member (phosphor-containing resin) sealed in the concave portion. And

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

  The reflection member 13 is a member that controls the distribution of light from the light source 11. In the present embodiment, the reflecting member 13 reflects 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 FIGS. 4 and 5, the reflecting member 13 emits the light from the end 131 on the side where the light from the light source 11 is incident (the positive side in the z-axis direction). The inner diameter is formed so as to gradually increase toward the side end 132. 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 31 with screws (not shown). Specifically, as shown in FIGS. 4 and 6, the first housing portion 31 is provided with a screw hole 312 provided to penetrate the bottom portion 310. A screw (not shown) is inserted into the screw hole 312 from behind the bottom 310, and is 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, so that the light source 11 can be prevented from falling.

  The reflection member 13 is formed using a hard white resin material such as polybutylene terephthalate (PBT), for example. 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 on which light from the reflecting member 13 is incident. As shown in FIGS. 4 and 5, the translucent cover 14 is arranged so as to cover the opening on the light emission side (negative side in the z-axis direction) of the reflection member 13.

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

  The translucent cover 14 is supported by the reflection 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 concave portion (not shown) that is engaged with each of the two claw portions 134. The translucent cover 14 is supported by the reflection member 13 because the concave portion is engaged with the claw portion 134.

  The translucent cover 14 may have a function of controlling the light distribution of the light passing through the reflecting member 13 and emitting the light. For example, the translucent cover 14 may be a Fresnel lens. Further, 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 may be formed with irregularities or a dot pattern on the surface.

[Speaker unit]
The speaker unit 20 is a part that plays a sound 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 opposite side (positive side in the z-axis direction) of the light emitting direction of the light source 11, that is, behind the light source 11. The sound emitted by 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 instrument body 30 in the z-axis direction. It is discharged to 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 paper) 21, a voice coil 22, a damper 23, a yoke 24 having a U-shaped cross section, and a frame 25. , Terminal 26, magnet 27, and plate 28.

  In the speaker unit 20, sound is emitted forward by the vibration of the diaphragm 21. 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 at an opening 353 provided in the enclosure 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 passes through the opening of the second housing 32. 323.

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

  The frame 25 is a frame for attaching the speaker unit 20 to the enclosure 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 via the lead wire.

[Instrument body]
The fixture body 30 is the main body of the lighting fixture 1 and houses the light source 11 (the lighting unit 10) and the speaker unit 20. As shown in FIG. 3, the device main body 30 includes a first housing 31, a second housing 32, a plurality of connecting portions 33, and an enclosure 35. The device main body 30 further has a hole portion 34 provided between the plurality of connection portions 33 for allowing 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 formed integrally (as one component). For example, the first housing portion 31, the second housing portion 32, and the plurality of connection portions 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.

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

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

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

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

  The outer bottom surface 310b is a surface on the positive side in the z-axis direction of the bottom portion 310, and faces the speaker unit 20. Between the outer bottom surface 310b and the speaker unit 20, there is provided a space where other members are not arranged.

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

  The bottom 310 is convex toward the speaker unit 20, as shown in FIG. That is, the outer bottom surface 310b of the bottom portion 310 is a surface formed to be convex 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 spherical side shape. The outer bottom surface 310b may have a convex polyhedral side shape. Specifically, the outer bottom surface 310b may be constituted by a plurality of planes arranged three-dimensionally so as to project toward the speaker unit 20.

  In the present embodiment, bottom 310 is a flat convex whose height is shorter than its 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 310b is the portion closest to the speaker unit 20. That is, the height of the bottom 310 is represented 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, two screw holes 312 and insertion holes 313 penetrating the bottom 310 in the thickness direction (z-axis direction) are provided in the bottom 310. 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 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 parallel to the optical axis J with the optical axis J as the central axis. As shown in FIG. 6, a plurality of connecting portions 33 are connected to the outer side surface 311a of the side wall portion 311.

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

[Second casing]
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 housing part 32 includes a cylindrical side wall part 321 and an end on the front side (negative side in the z-axis direction) of the side wall part 321. And a flange portion 322 having a substantially annular shape in plan view.

  The side wall part 321 forms an outer shell of the device 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 321. The opening 323 is a substantially circular opening, and is formed by the inner circumference of a substantially annular flange 322.

  As shown in FIG. 6, a plurality of connecting portions 33 are connected to the inner side surface 321a of the side wall portion 321. Three mounting springs 50 are fixed to the outer side surface of the side wall part 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 illumination unit 10 is inserted. The lead wire is inserted through 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 an external power supply circuit and the light source 11.

  The flange portion 322 is a portion that extends outward from the front end of the side wall portion 321 in the xy plane. The flange portion 322 comes into contact with the ceiling plate when the lighting fixture 1 is attached to the ceiling mounting hole. 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 casing 31, and the axial direction of the second casing 32 substantially match. 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 31 is an imaginary line passing through the center of the substantially circular bottom 310 and 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 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 (radiation fin)]
The plurality of connection portions 33 are portions that connect the outer surface 311a of the first housing portion 31 and the inner surface 321a of the second housing portion 32. Specifically, each of the plurality of connection portions 33 is a plate-shaped heat radiation fin parallel to the axial direction (optical axis J) of the first housing portion 31. The plurality of connection portions 33 dissipate heat generated by the light source 11 housed in the first housing portion 31 to the outside by transmitting the heat from the first housing portion 31 to the second housing portion 32. Further, the plurality of connection portions 33 support the first housing portion 31 inside the second housing portion 32. As described above, the plurality of connection portions 33 realize both functions of heat radiation from the light source 11 and 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, when viewed from above or from below). For example, as shown in FIG. 8, fifteen connection portions 33 are radially arranged at an equal angle around the optical axis J. Each of the plurality of connection parts 33 connects the first housing part 31 and the second housing part 32 with the shortest distance. The number of the connection portions 33 may be any number, for example, two.

  The plurality of connecting portions 33 have the same shape and the same size as each other. 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) of the connecting portion 33 orthogonal to the thickness direction is, for example, a trapezoid.

  More specifically, the connection part 33 has a lower side (lower end) perpendicular 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 (that is, in a direction away from the speaker unit 20) as approaching from the first housing portion 31 to the second housing portion 32. The right side (right end) and the left side (left end) of the connection portion 33 are longer than a predetermined length and are 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 311a of the first housing portion 31, and the left side is a portion in contact with the inner side surface 321a of the second housing portion 32. For example, the left side of the connection part 33 has a length substantially equal to the height of the lighting unit 10.

  In the present embodiment, an example is described in which the connecting portion 33 is a trapezoidal flat plate portion, but the present invention is not limited 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 curved line.

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

  As shown in FIG. 6, the hole portion 34 includes a plurality of holes in a substantially annular space between 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 when viewed from above. Is a space excluding the connection part 33 of FIG. The hole 34 is divided into a plurality of partial holes by a plurality of connecting portions 33. The partial hole is a through hole surrounded by the side surface, the outer surface 311a, and the inner surface 321a of the two adjacent connection portions 33.

  In the present embodiment, when the second casing 32 is viewed in the axial direction (when viewed from above or below), the opening area of the hole 34 is 30 times smaller than the opening area of the opening 323 of the second casing 32. % Or more. Since the holes 34 are provided to allow sound from the speaker unit 20 to pass through, the larger the opening area, the higher the sound quality of the lighting fixture 1 can be. Therefore, for example, the opening area of the hole 34 may be 50%, preferably 60% or more of the opening area of the opening 323.

[Enclosure part]
The enclosure 35 is a housing that houses the speaker unit 20. The enclosure 35 is fixed to the second housing 32 so that the speaker unit 20 emits sound toward the bottom 310 of the first housing 31. Specifically, the enclosure 35 is fixed to the second housing 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 35 in an exploded manner. The enclosure 35 includes a first box 351 and a second box 352, as shown in FIG. The first box 351 is a flat, substantially rectangular parallelepiped box, and has an open upper surface. The second box 352 is a flat, substantially rectangular parallelepiped box, and its lower surface is open.

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

  The first box 351 has 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 to a control circuit (not shown) arranged outside the instrument body 30.

  The first box 351 is provided with a screw hole 355. The screw hole 355 is a through hole into which a screw 60 for fixing the enclosure 35 to the second housing 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 at the upper part of the second housing part 32, whereby the first The box 351 (the enclosure 35) and the second housing 32 are fixed.

  Further, the first box 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 35 (the first box 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 unit 35, so that the speaker unit 20 is fixed to the enclosure unit 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 way, the first box 351 and the second box 352 are combined to form a space 359 for containing the rear sound from the speaker unit 20.

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

  FIG. 9 is a diagram showing a relationship between the volume of the enclosure 35 of the lighting fixture 1 according to the present embodiment, an output sound pressure level (SPL; Sound Pressure Level), and impedance. The solid line and broken line graphs shown in FIG. 9 show the cases where the volumes are 315 cc and 135 cc, respectively. 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 section 35, the sound pressure level in the low range is increased, and the band in the low range 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 has decreased from about 165 Hz to about 140 Hz.

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

  The enclosure portion 35 projects to the side of the second housing portion 32 when viewed in the axial direction of the second housing portion 32 (specifically, when viewed from below). In the present embodiment, as shown in FIG. 2, the enclosure portion 35 extends only in one direction (specifically, the positive side in the y-axis direction). Accordingly, when the lighting fixture 1 is mounted on a ceiling or the like, the lighting fixture 1 can be inserted into the mounting hole by passing the front end (the positive side in the y-axis direction) of the enclosure portion 35 through the mounting hole.

  The enclosure 35 is formed using a metal material or a resin material. Specifically, each of the first box 351 and the second box 352 is made of aluminum die-cast. 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 two or more directions on the side of the second housing part 32 when viewed from below.

[Mesh member]
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 connecting portions 33. The mesh member 40 is provided to suppress foreign matter such as dust from entering the space between the speaker unit 20 and the first housing portion 31 from the outside via the hole 34. The mesh member 40 has a plurality of pores arranged two-dimensionally, and allows sound emitted from the speaker unit 20 to pass through the hole 34.

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

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

  The mounting spring 50 is formed into a long thin 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 mounting springs 50, but the number and positions of the mounting springs 50 are not limited thereto.

[Effects, etc.]
As described above, the lighting fixture 1 according to the present embodiment includes the light source 11, the speaker unit 20 arranged on the side opposite to the light emission direction of the light source 11, and the fixture body that houses the light source 11 and the speaker unit 20. 30. The apparatus main body 30 includes a bottomed cylindrical first housing portion 31 that supports the light source 11 inside, a cylindrical second housing portion 32 that houses the first housing portion 31 inside, and a speaker unit 20. And an enclosure section 35 for storing the. The enclosure portion 35 projects to the side of the second housing portion 32 when viewed in the axial direction of the second housing portion 32.

  As shown in FIG. 9, the sound quality of the lighting fixture 1 can be improved by increasing the volume of the enclosure 35. For example, in order to increase the volume of the enclosure 35, the enclosure 35 may be extended in a direction along the optical axis J (specifically, the positive side in the z-axis direction). However, in this case, the height (length in the z-axis direction) of the lighting fixture 1 becomes large, and it is difficult or impossible to attach the lighting fixture 1 to a mounting hole such as a ceiling.

  On the other hand, in the present embodiment, since the enclosure portion 35 projects laterally, the volume of the enclosure portion 35 can be increased without increasing the height of the lighting fixture 1. Therefore, the sound quality of the lighting fixture 1 can be improved without increasing the height of the lighting fixture 1.

  In addition, for example, when viewed in the axial direction of the second housing part 32, the enclosure part 35 extends only in one direction beside the second housing part 32.

  Thus, since the enclosure 35 extends only in one direction, the lighting fixture 1 can be inserted from the front end of the enclosure 35 when the lighting fixture 1 is inserted into a mounting hole such as a ceiling. Therefore, attachment of the lighting fixture 1 becomes easy.

  Further, for example, the enclosure unit 35 is fixed to the second housing unit 32 so that the speaker unit 20 emits sound toward the bottom 310 of the first housing unit 31.

  As described above, when the first housing unit 31 is provided in front of the speaker unit 20, sound from the speaker unit 20 is blocked by the first housing unit 31, and the sound quality of the lighting fixture 1 is poor. There is a risk of becoming. Therefore, as in the lighting fixture 1 according to the present embodiment, by extending the enclosure portion 35 to the side, the volume of the enclosure portion 35 can be increased, and the sound quality can be improved.

  Further, for example, the volume of the enclosure unit 35 is 250 cc or more.

  Thereby, since the volume of the enclosure 35 is 250 cc or more, a sufficient volume can be secured according to the size of the speaker unit 20 that can be used for a general downlight size, for example. Therefore, the sound quality of the lighting fixture 1 can be improved.

  Further, for example, the enclosure section 35 is formed using a metal material or a resin material.

  Thereby, for example, when the enclosure part 35 is formed using a resin material, the lighting fixture 1 can be reduced in weight. Further, for example, when the enclosure section 35 is formed using a metal material, the sound quality of the lighting fixture 1 can be improved.

  In addition, 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 unit 31, and the axial direction of the second housing unit 32 substantially match.

  As a result, since the axes of the light source 11, the speaker unit 20, the first casing 31 and the second casing 32 substantially coincide with each other as the optical axis J, the surroundings can be uniformly illuminated without anisotropy. Can output sound.

  Further, for example, the lighting fixture 1 is a ceiling-mounted 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, as compared with a 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.

(Other)
As described above, the lighting fixture according to the present invention has been described based on the embodiments and the modifications, but the present invention is not limited to the above embodiments.

  For example, in the above-described embodiment, an example in which the heat radiation fin is not provided on the bottom portion 310 is described, but the present invention is not limited to this. 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 310.

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

  Further, for example, in the above-described embodiment, an example has been described in which the enclosure portion 35 projects laterally when viewed from below, but the present invention is not limited to this. For example, when the height of the lighting fixture 1 is not limited, the enclosure 35 may extend upward without protruding sideways.

  Further, for example, in the above-described embodiment, an example in which the light source 11 includes the LED 111 has been described, but the invention is not limited thereto. The light source 11 may include an organic EL (Electro Luminescence) element or a laser element.

  Further, for example, in the above-described embodiment, an example is described in which the lighting fixture 1 is a ceiling-mounted lighting fixture such as a downlight, but 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.

  The lighting fixture 1 according to the above-described embodiment may include a communication unit that performs wireless communication. For example, the lighting fixture 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 a signal for lighting control or sound control from the smartphone via wireless communication, for example, and emit light or sound based on the received signal.

  In addition, a form obtained by performing various modifications that can be conceived by those skilled in the art to each embodiment, and a combination of components and functions in each embodiment without departing from the spirit of the present invention are realized. Embodiments are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 11 Light source 20 Speaker unit 30 Fixture main body 31 First casing 32 Second casing 35 Enclosure 310 Bottom

Claims (7)

Light source,
A speaker unit arranged 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 first housing portion having a bottomed cylindrical shape that supports the light source therein;
A cylindrical second housing portion that houses the first housing portion therein;
Having an enclosure part for accommodating the speaker unit,
The lighting fixture, wherein the enclosure portion projects to the side of the second housing portion when viewed in the axial direction of the second housing portion. The lighting device according to claim 1, wherein the enclosure portion extends only in one side of the second housing portion when viewed in an axial direction of the second housing portion. The lighting device according to claim 1, wherein the enclosure unit is fixed to the second housing unit such that the speaker unit emits a sound toward a bottom of the first housing unit. The lighting device according to any one of claims 1 to 3, wherein a volume of the enclosure portion is 250 cc or more. The lighting device according to any one of claims 1 to 4, wherein the enclosure portion is formed using a metal material or a resin material. The light emission direction of the light source, the sound output direction of the speaker unit, the axial direction of the first casing, and the axial direction of the second casing are substantially the same. The lighting fixture according to claim 1. The lighting fixture according to any one of claims 1 to 6, wherein the lighting fixture is a ceiling-mounted lighting fixture.

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