CN108884988B - Lighting apparatus - Google Patents

Abstract

A lighting fixture (1) is provided with: a light source (11); a speaker unit (20) provided on the side opposite to the light emission direction of the light source (11); and an appliance main body (30) that houses the light source (11) and the speaker unit (20), the appliance main body (30) having: a first frame part (31) having a cylindrical shape with a bottom for supporting the light source (11) therein; and a cylindrical second housing part (32) for housing the first housing part (31) therein, wherein the bottom part (310) of the first housing part (31) is convex toward the speaker unit (20).

Description

Lighting apparatus

Technical Field

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

Background

A down lamp integrated with a speaker is known (for example, patent document 1). Patent document 1 discloses a speaker with a lighting fixture in which a light source is attached to the front of a speaker unit.

(Prior art document)

(patent document)

Patent document 1: International publication No. 2010/071102

Disclosure of Invention

Problems to be solved by the invention

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

Accordingly, an object of the present invention is to provide a lighting fixture with good sound quality.

Means for solving the problems

In order to achieve the above object, a lighting fixture according to the present invention includes: a light source; a speaker unit provided on a side of the light source opposite to a light emitting direction; and an appliance main body that houses the light source and the speaker unit, the appliance main body including: a first frame part having a bottomed tubular shape for supporting the light source therein; and a cylindrical second housing portion for housing the first housing portion therein, wherein a bottom portion of the first housing portion is convex toward the speaker unit.

Effects of the invention

The present invention can provide a lighting device with good sound quality.

Drawings

Fig. 1 is a perspective view of a lighting fixture according to an 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 oblique view of the lighting apparatus according to the embodiment.

Fig. 5 is a sectional view of the lighting apparatus according to the embodiment taken along line V-V of fig. 2.

Fig. 6 is a sectional view of the lighting fixture according to the embodiment taken along line VI-VI in fig. 5.

Fig. 7 is an exploded perspective view of a lighting unit and the like of the lighting apparatus according to the embodiment.

Fig. 8 is an exploded perspective view of a sound box portion and the like of the lighting apparatus according to the embodiment.

Fig. 9 is a diagram showing a relationship between a volume of a sound box unit of the lighting apparatus according to the embodiment, an output sound pressure level, and impedance.

Fig. 10 is a sectional view of an apparatus main body according to a modification of the embodiment.

Fig. 11 is a diagram showing frequency characteristics of an output sound pressure level of a sound emitted from the lighting apparatus according to the modified example of the embodiment, with respect to the presence or absence of the inclined portion.

Detailed Description

The following describes a lighting fixture according to an embodiment of the present invention in detail with reference to the drawings. The embodiments described below are merely preferred specific examples of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement and connection forms of the constituent elements, steps, order of the steps, and the like shown in the following embodiments are merely examples, and the present invention is not limited thereto. Therefore, among the constituent elements of the following embodiments, constituent elements that are not described in the embodiments showing the uppermost concept of the present invention will be described as arbitrary constituent elements.

Each drawing is a schematic drawing, and is not strictly illustrated. Therefore, for example, the scale is not uniform in each drawing. In the drawings, substantially the same components are denoted by the same reference numerals, and redundant description thereof will be omitted or simplified.

(embodiment mode)

[ Lighting apparatus ]

First, an outline of the lighting fixture according to the present embodiment will be described with reference to fig. 1 to 6.

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

In each drawing, a direction parallel to the optical axis J is referred to as a z-axis direction, and two directions orthogonal to the optical axis J and each other are referred to 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 sound box portion 35 of the device main body 30 extends. In the present specification, the light emission direction of the lighting fixture 1 (specifically, the negative side in the z-axis direction) is referred to as "front", and the opposite side is referred to as "rear".

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

In the present embodiment, as shown in fig. 1 and 2, the lighting fixture 1 includes: the lighting unit 10, the device body 30, the net member 40, and the attachment spring piece 50. As shown in fig. 3 to 5, the lighting fixture 1 further includes a speaker unit 20 located behind the lighting unit 10. The lighting apparatus 1 is a speaker-integrated lighting apparatus including a lighting unit 10 and a speaker unit 20.

The respective constituent members (components) of the lighting fixture 1 will be described in detail below. Further, a detailed description is omitted except for a part thereof, and the lighting fixture 1 is provided with a fixing member such as a locking portion or a screw as appropriate, and the components are coupled and fixed to each other.

[ 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 a light source 11 and emits light vertically downward (negative side in the z-axis direction). That is, in the present embodiment, the light emitting direction of the light source 11 is the negative side of the z-axis direction.

Fig. 7 is a partially exploded perspective view of the lighting fixture 1 according to the present embodiment, and mainly illustrates 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 light-transmitting cover 14.

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

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 (LED111) 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 substrate 110 may have a rectangular planar shape, a polygonal shape such as a hexagonal shape or an octagonal shape, or a circular shape. Metal wiring (not shown) is formed on the substrate 110 to electrically connect the LEDs 111.

The LED111 is an example of a light emitting element, and is a semiconductor light emitting element that emits light according to predetermined power. The LED111 is, for example, a bare chip that emits monochromatic visible light, specifically, a blue light-emitting LED chip that emits blue light when energized. The LEDs 111 are provided in a plurality of columns 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 of the LEDs 111 on the substrate 110 may be collectively sealed.

The sealing member includes, for example, a translucent resin material such as silicone as a main component, and a wavelength conversion member that converts the wavelength of light from the LED 111. The wavelength conversion member is, for example, phosphor particles, specifically yellow phosphor particles. In the present embodiment, blue light emitted from the LED111 and yellow light emitted from the yellow phosphor particles excited by the blue light are mixed, and the light source 11 emits white light. In addition, the sealing member may contain silica or the like (SiO)₂) The light diffusion member (light scattering particles) of (1).

In addition, the light source 11 may be an SMD Surface Mounted Device (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 (LED111) mounted in the recess, and a sealing member (phosphor-containing resin) sealed in the recess.

The heat dissipation member 12 is a heat sink having adhesiveness, liquid heat dissipation silicon having good heat conductivity, or the like. As shown in fig. 4 and 5, the heat dissipation member 12 fixes the light source 11 to the first housing 31 by bonding the substrate 110 to the inner bottom surface 310 a. The heat dissipation member 12 transmits heat generated by the light source 11 to the first housing 31.

The reflecting member 13 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 light-transmissive 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 5, the reflecting member 13 is formed such that the inner diameter gradually increases from an end 131 on the side (positive side in the z-axis direction) on which light from the light source 11 is incident toward an end 132 on the side on which the light is emitted. The inner surface 133 of the reflecting member 13 is a reflecting surface that reflects light from the light source 11.

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

The reflecting member 13 is formed of a hard white resin material such as polybutylene terephthalate (PBT). In this case, a metal reflective film made of aluminum or the like may be provided on the inner surface of the reflective member 13.

The light-transmitting cover 14 is a light-transmitting member into which light from the reflecting member 13 is incident. As shown in fig. 4 and 5, the light-transmissive cover 14 is provided so as to cover an opening on the light exit side (the negative side in the z-axis direction) of the reflective member 13.

The light-transmitting cover 14 is made of a light-transmitting material. The light-transmitting cover 14 is made of a transparent resin material such as polymethyl methacrylate (PMMA) or Polycarbonate (PC). Or the light-transmitting cover 14, may be formed of a transparent glass material.

And a light-transmitting cover 14 supported by the reflecting member 13. Specifically, as shown in fig. 7, the reflecting member 13 is provided with two claw portions 134. The light-transmitting cover 14 is provided with recesses (not shown) that are locked to the two claw portions 134, respectively. The concave portion is locked to the claw portion 134, and the light-transmitting cover 14 is supported by the reflecting member 13.

The light-transmitting cover 14 may have a function of controlling the distribution of light passing through the reflecting member 13 and emitting the light. For example, the light transmissive cover 14 may be a fresnel lens. Further, the light-transmissive cover 14 may have a light diffusing (scattering) structure. For example, the light-transmitting cover 14 may be formed of a resin material in which a diffusing material is dispersed, or may be formed by forming an uneven or dot pattern on the surface.

[ speaker unit ]

The speaker unit 20 is a part that performs an acoustic function of the lighting fixture 1. In the present embodiment, the speaker unit 20 emits various sounds such as music, voice, and alarm sound. The sound emitting direction of the speaker unit 20 is the negative side of the z-axis direction and substantially coincides with the light emitting direction of the light source 11.

In the present embodiment, the speaker unit 20 is provided on the opposite side (the 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 from the speaker unit 20 is emitted to the negative side in the z-axis direction through a hole 34 (see fig. 4 and 6) provided between the first housing portion 31 and the second housing portion 32 of the device main body 30.

The speaker unit 20 is, for example, a cone-shaped speaker unit. Specifically, as shown in fig. 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, a frame 25, a terminal 26, a magnet 27, and a plate 28.

In the speaker unit 20, the diaphragm 21 vibrates to emit sound forward. The diaphragm 21 vibrates in accordance with the vibration of the voice coil 22. As shown in fig. 4 and 5, the diaphragm 21 is exposed from an opening 353 provided in the sound box portion 35. The sound emitted from the diaphragm 21 is emitted forward from the opening 353, passes through the hole 34 between the first frame portion 31 and the second frame portion 32, and is emitted from the opening 323 of the second frame portion 32.

The voice coil 22 vibrates in response to an input audio signal received through 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 a magnetic circuit of the speaker unit 20, and vibrate the voice coil 22 in response to an input audio signal received by the terminal 26.

The frame 25 is a housing for mounting the speaker unit 20 to the speaker unit 35. As shown in fig. 4, the frame 25 is provided with a plurality of screw holes 251 (specifically, 4). The terminal 26 is connected to a lead wire (not shown), and is connected to a control circuit of the speaker unit 20 via the lead wire.

[ appliance Main body ]

The device body 30 is a body of the lighting device 1, and houses the light source 11 (lighting unit 10) and the speaker unit 20. As shown in fig. 3, the device main body 30 includes: a first frame part 31, a second frame part 32, a plurality of connecting parts 33, and a sound box part 35. The device main body 30 further has a hole 34, and the hole 34 is provided between the plurality of connection portions 33 and allows sound from the speaker unit 20 to pass therethrough.

In the present embodiment, the first frame portion 31, the second frame portion 32, and the plurality of connecting portions 33 are integrally formed (as one member). For example, the first frame portion 31, the second frame portion 32, and the plurality of connecting portions 33 are made of aluminum die casting, but may be formed by press working or the like. The sound box portion 35 is fixed to the second housing portion 32 by screws 60 shown in fig. 3.

The respective components of the device body 30 will be described in detail below.

[ first frame part ]

The first frame portion 31 is a bottomed cylindrical frame portion that supports the light source 11 therein. In the present embodiment, as shown in fig. 4, the first frame portion 31 includes: a bottom portion 310 having a substantially circular planar shape, and a cylindrical side wall portion 311 erected on the outer peripheral end of the bottom portion 310 in a planar view.

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

The inner bottom surface 310a is a surface on the negative side of the bottom portion 310 in the z-axis direction, and is mounted with the light source 11. 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 reflecting member 13 of the illumination unit 10 is inserted.

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

The outer bottom surface 310b has a symmetrical shape with respect to the axis of the speaker unit 20 (i.e., the optical axis J). Specifically, the outer bottom surface 310b has a line-symmetrical shape with respect to the optical axis J in a side view (corresponding to fig. 5). The outer bottom surface 310b has a point-symmetric (or rotationally symmetric) shape with respect to the optical axis J in a plan view (corresponding to fig. 6). 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. The outer bottom surface 310b has a symmetrical shape with respect to the optical axis J, except for the insertion hole 313.

As shown in fig. 5, the bottom portion 310 is convex toward the speaker unit 20. That is, the outer bottom surface 310b of the bottom portion 310 is formed to be convex toward the speaker unit 20.

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

In the present embodiment, the bottom portion 310 is a flat convex shape having a height shorter than a width. The height of the bottom portion 310 is the length in the z-axis direction, and is represented by, for example, 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 portion 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 the maximum width of the bottom 310, for example, in the xy-plane.

As shown in fig. 6, the bottom portion 310 is provided with two screw holes 312 and insertion holes 313 penetrating 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. After the screw (not shown) is inserted, the screw hole 312 may be filled with resin or the like so that the outer bottom surface 310b becomes smooth.

The side wall portion 311 is a cylindrical portion parallel to the optical axis J with the optical axis J as a center. As shown in fig. 6, the outer surface 311a of the side wall 311 is connected to the plurality of connection portions 33.

In the present embodiment, as shown in fig. 5, the first frame portion 31 is located at a substantially central position of the second frame portion 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 a space having a predetermined width is also provided between the first housing portion 31 and the opening 323 on the front side of the second housing portion 32.

[ second frame part ]

The second frame portion 32 is a cylindrical frame portion that accommodates the first frame portion 31 therein. In the present embodiment, as shown in fig. 4 to 6, the second frame portion 32 includes a cylindrical side wall portion 321, and a flange portion 322 provided at an end portion on the front side (negative side in the z-axis direction) of the side wall portion 321 and having a substantially annular shape in plan view.

The side wall portion 321 constitutes the periphery of the appliance main body 30. As shown in fig. 4 and 5, an opening 323 is provided on the front side of the side wall portion 321, and light from the illumination unit 10 is emitted through the opening 323. The opening 323 is a substantially circular opening and is formed by the inner periphery of the substantially circular flange portion 322.

As shown in fig. 6, the inner surface 321a of the side wall 321 is connected to the plurality of connecting portions 33. Three mounting spring pieces 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 illumination unit 10 is inserted. The lead wires are inserted through the insertion holes provided in the side wall portions 321 and the insertion holes 313 provided in the first housing portion 31, and electrically connect the external power supply circuit to the light source 11.

The flange portion 322 is a portion extending outward on the xy plane from the front end of the side wall portion 321. The flange portion 322 abuts against the ceiling when the lighting fixture 1 is mounted in the mounting hole of the ceiling. Specifically, the ceiling is sandwiched by the flange portion 322 and the mounting spring 50, so that the lighting fixture 1 is fixed to the mounting hole.

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 are substantially the same. Specifically, the sound emission direction of the speaker unit 20 is substantially aligned with the optical axis J by a virtual line passing through the center of the cone-shaped diaphragm 21. The axis of the first housing portion 31 is a virtual line perpendicular to the inner bottom surface 310a passing through the center of the substantially circular bottom portion 310, 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 perpendicular to the opening 323 passing through the center of the substantially circular opening 323, and substantially coincides with the optical axis J.

[ connecting part (Heat sink) ]

The plurality of connecting portions 33 are portions connecting the outer surface 311a of the first frame portion 31 and the inner surface 321a of the second frame portion 32. Specifically, each of the plurality of connecting portions 33 is a plate-shaped heat sink parallel to the axial direction (optical axis J) of the first frame portion 31. The plurality of connecting portions 33 transmit heat emitted from the light source 11 housed in the first housing portion 31 from the first housing portion 31 to the second housing portion 32, and diffuse the heat to the outside. The plurality of connecting portions 33 support the first frame portion 31 in the second frame portion 32. In this way, the plurality of connecting portions 33 perform both functions of dissipating heat from the light source 11 and supporting the light source 11 (first housing portion 31).

In the present embodiment, the plurality of connecting portions 33 are arranged in a radial shape when the second frame portion 32 is viewed from the axial direction (specifically, in a plan view or a bottom view). For example, as shown in fig. 8, 15 connection portions 33 are arranged in a radial shape at an equal angle centering on the optical axis J. Each of the plurality of connecting portions 33 connects the first frame portion 31 and the second frame portion 32 at the shortest distance. The number of the connection portions 33 may be plural, and may be two, for example.

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 trapezoid.

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

In the present embodiment, the example in which the connecting portion 33 is a trapezoidal flat plate portion is shown, but the present invention is not limited to this. The connecting portion 33 may be a rectangular or square flat plate portion. Alternatively, the upper or lower edge of the connecting portion 33 may be curved.

[ hole part ]

The hole 34 is provided to allow sound from the speaker unit 20 located behind the illumination unit 10 (first housing portion 31) to pass therethrough. That is, the hole 34 functions as a sound passage. The hole 34 is a through hole that communicates the space on the rear side of the first frame portion 31 in the second frame portion 32 with the space (external space) on the front side of the first frame portion 31.

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

In the present embodiment, when the second frame portion 32 is viewed from the axial direction (specifically, in a plan view or a bottom view), the opening area of the hole portion 34 is 30% or more of the opening area of the opening 323 of the second frame portion 32. Since the hole 34 is provided to allow sound from the speaker unit 20 to pass therethrough, the sound quality of the lighting fixture 1 can be improved if the opening area is large. 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.

[ speaker part ]

The speaker unit 35 is a housing portion that houses the speaker unit 20. The speaker unit 35 is fixed to the second housing portion 32 so that the speaker unit 20 emits sound to the bottom portion 310 of the first housing portion 31. Specifically, the sound box unit 35 is fixed to the second housing unit 32 by screws 60.

Fig. 8 is an exploded perspective view of a part of the lighting apparatus 1 according to the present embodiment, and mainly illustrates the speaker unit 35 in an exploded manner. As shown in fig. 8, the sound box unit 35 includes a first casing 351 and a second casing 352. The first casing 351 is a flat, substantially rectangular parallelepiped casing, and has an upper surface opened. The second casing 352 is a flat, substantially rectangular parallelepiped casing, and the lower surface thereof is open.

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

The first case 351 is provided with an insertion hole 354. The insertion hole 354 is a through hole for inserting a lead wire (not shown) that supplies an input audio signal and the like to the speaker unit 20. The lead wire connects the terminal 26 of the speaker unit 20 to a control circuit (not shown) disposed outside the device main body 30.

The first casing 351 is provided with a screw hole 355. The screw hole 355 is a through hole through which the screw 60 for fixing the sound box portion 35 to the second housing portion 32 is inserted. Specifically, as shown in fig. 3, the screw 60 is inserted through the screw hole 355 and screwed into a screw hole (not shown) provided in an upper portion of the second housing portion 32, thereby fixing the first casing 351 (the sound box portion 35) and the second housing portion 32.

The first casing 351 is provided with a screw hole 356. The screw holes 356 are holes into which screws (not shown) for fixing the speaker unit 20 to the cabinet portion 35 (first casing 351) are screwed. Specifically, the speaker unit 20 is fixed to the cabinet portion 35 by inserting screws (not shown) into screw holes 251 of the speaker unit 20 and screwing the screws into screw holes 356 of the cabinet portion 35.

The first casing 351 and the second casing 352 are fixed by screws 36. Specifically, as shown in fig. 8, four screw holes 357 are provided in the first casing 351, and four screw holes 358 are provided in the second casing 352. Screws 36 are inserted through screw holes 358 of second casing 352 and screwed into screw holes 357 of first casing 351, thereby fixing first casing 351 and second casing 352 and forming space 359 therein. In this manner, the first casing 351 and the second casing 352 are combined, and a space 359 is formed to enclose the sound on the rear side emitted from the speaker unit 20.

The size of the space 359, that is, the volume of the cabinet portion 35 is determined in accordance with the output of the speaker unit 20. By changing the volume of the sound box portion 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 Sound box unit 35 of the lighting apparatus 1 according to the present embodiment, the output Sound Pressure Level (SPL), and the impedance. The solid line and dashed line graphs shown in fig. 9 indicate the cases where the volumes are 315cc and 135cc, respectively. In fig. 9, the horizontal axis shows the frequency of the sound output by the speaker unit 20, the left vertical axis shows the output sound pressure level, and the right vertical axis shows the impedance.

In the present embodiment, the volume of the sound box unit 35 is increased, so that the sound pressure level of the low frequency rises and the frequency band of the low frequency is expanded. Specifically, as shown in fig. 9, the output sound pressure level rises by approximately 3dB in the range of 50Hz to 100 Hz. The lowest resonance frequency f0 is reduced from about 165Hz to about 140 Hz.

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

The sound box portion 35 extends laterally of the second housing portion 32 when viewed in the axial direction of the second housing portion 32 (specifically, in a bottom view). In the present embodiment, as shown in fig. 2, the sound box portion 35 projects in only one direction (specifically, on 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 through the mounting hole from the front end (the positive side in the y-axis direction) of the sound box portion 35.

The sound box portion 35 is formed using a metal material or a resin material. Specifically, each of first case 351 and second case 352 is aluminum die cast. Alternatively, each of first case 351 and second case 352 may be formed by injection molding using a resin material such as PBT.

The sound box portion 35 may extend in two or more directions laterally to the second housing portion 32 in a bottom view.

[ Net-shaped 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 a space between the speaker unit 20 and the first housing portion 31 through the hole 34 from the outside. In the mesh member 40, the plurality of pores are arranged two-dimensionally, and sound emitted from the speaker unit 20 and passing through the holes 34 passes through.

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

[ mounting spring leaf ]

And a mounting spring 50 for mounting the lighting fixture 1 to a mounting hole of a ceiling or the like. Specifically, the lighting fixture 1 can be mounted by the mounting spring 50 and the flange 322 of the fixture body 30 sandwiching the ceiling therebetween by the restoring force of the mounting spring 50.

The attachment spring piece 50 is formed into an elongated thin plate shape by press working 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 mounting spring pieces 50, but the number and positions of the mounting spring pieces 50 are not limited thereto.

[ Effect and the like ]

As described above, the lighting fixture 1 according to the present embodiment includes: a light source 11; a speaker unit 20 provided on the opposite side of the light emitting direction of the light source 11; and an appliance main body 30 that houses the light source 11 and the speaker unit 20. The device main body 30 includes: a first frame part 31 having a bottomed cylindrical shape for supporting the light source 11 therein; and a cylindrical second frame portion 32 for accommodating the first frame portion 31 therein. The bottom 310 of the first housing portion 31 is convex toward the speaker unit 20.

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

For example, the outer bottom surface 310b of the bottom portion 310, i.e., the surface on the speaker unit 20 side, has a symmetrical shape with respect to the axis of the speaker unit 20.

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

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

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

For example, the bottom portion 310 is a flat convex shape having a height shorter than a width.

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

For example, 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 are substantially aligned.

Accordingly, since the axis of each of the light source 11, the speaker unit 20, the first housing portion 31, and the second housing portion 32 substantially coincides with the optical axis J, the light is uniformly illuminated around without anisotropy, and the sound is uniformly output.

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

Therefore, the lighting fixture 1 can be installed on a ceiling or the like as a down lamp having a speaker function, for example. Therefore, compared to the case where the speaker and the lighting fixture are separately installed, the installation work can be facilitated, the number of holes provided in the ceiling can be reduced, and the design of the ceiling can be improved.

(modification example)

Here, a modification of the lighting fixture according to the above embodiment will be described.

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

The lighting fixture 401 according to the present modification is different from the lighting fixture 1 shown in fig. 5 in that an inclined portion 460 is newly provided. Specifically, the lighting fixture 401 includes a fixture main body 430 having an inclined portion 460 instead of the fixture main body 30. Hereinafter, differences from the above-described embodiments will be mainly described, and descriptions of the same parts will be omitted or simplified.

As shown in fig. 10, the device main body 430 includes a sound box unit 435. The sound box unit 435 includes a first box body 451 having an inclined portion 460. Further, when the appliance main body 430, the sound box portion 435, and the first case 451 are compared with the appliance main body 30, the sound box portion 35, and the first case 351, respectively, the same points are the function, material, forming method, and the like, and the difference is that the first case 451 is provided with the inclined portion 460.

The inclined portion 460 is inclined from the end portion on the light exit side of the speaker unit 20 toward the inner surface of the second housing portion 32. Specifically, the inclined portion 460 has a curved surface 461 curved convexly toward the speaker unit 20. The inclined portion 460 is formed in a cylindrical shape (a reverse tapered shape or a bowl shape without a bottom portion) in which the opening width gradually increases toward 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 formed in a circular ring shape around the entire circumference of the speaker unit 20, for example, in a bottom view.

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

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

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

Fig. 11 is a diagram showing the frequency characteristics of the output sound pressure level of the sound emitted from the lighting fixture 401 according to the presence or absence of the inclined portion 460 according to the present modification. In fig. 11, the horizontal axis shows the frequency of the sound output by the speaker unit 20, and the vertical axis shows the output sound pressure level.

As shown in fig. 11, when the inclined portion 460 is not provided, a decrease (sag) in the output sound pressure level is observed at about 7kHz and about 12 kHz. In contrast, by providing the inclined portion 460, the sag is eliminated. That is, the output sound pressure level rises around 7kHz and around 12 kHz.

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

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

In the present modification, the sound box unit 435 includes the inclined portion 460, but the present invention is not limited to this. The inclined portion 460 may be formed integrally with the second frame portion 32. Alternatively, the inclined portion 460 may be formed separately from the sound box portion 435, the first housing portion 31, the second housing portion 32, and the connection portion 33 (as another member). For example, the inclined portion 460 may be formed by applying an adhesive resin material to the sound box portion 435 so as to surround the speaker unit 20 and curing the resin material.

(others)

The lighting fixture according to the present invention has been described above with reference to the embodiments and the modifications thereof, but the present invention is not limited to the embodiments.

For example, in the embodiment, the example in which the heat sink is not provided at the bottom portion 310 is shown, but is not limited thereto. For example, in the case where the height of the lighting fixture 1 is not limited, one or more heat dissipation fins may be provided on the bottom portion 310.

For example, although the bottom portion 310 is convex toward the speaker unit 20 in the above embodiment, the present invention is not limited thereto. The outer bottom surface 310b of the bottom portion 310 may be a plane orthogonal to the optical axis J. Further, a recess or a through hole may be provided locally like the screw hole 312, the insertion hole 313, and the like.

For example, although the sound box portion 35 is shown in the above-described embodiment as extending laterally in a bottom view, the present invention is not limited to this. For example, when the height of the lighting apparatus 1 is not limited, the sound box portion 35 may extend upward without protruding sideways.

For example, although the embodiment described above shows an example in which the light source 11 includes the LED111, the present invention is not limited to this. The light source 11 may include an organic el (electro luminescence) element, a laser element, or the like.

For example, although the above embodiment shows an example in which the lighting apparatus 1 is a ceiling-embedded lighting apparatus such as a downlight, the present invention is not limited to this. For example, the lighting fixture 1 may be a ceiling lamp, a spotlight, a floor lamp, or the like.

The lighting fixture 1 according to the above embodiment may further 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). Accordingly, the lighting apparatus 1 can receive a signal for controlling lighting or sound from the smartphone by, for example, wireless communication, and perform lighting or sound emission based on the received signal.

In addition, the present invention includes an embodiment obtained by applying various modifications to the respective embodiments, and an embodiment obtained by arbitrarily combining the constituent elements and functions of the respective embodiments without departing from the spirit of the present invention.

Description of the symbols

1. 401 Lighting appliance

11 light source

20 speaker unit

30. 430 appliance body

31 first frame body part

32 second frame part

310 bottom

310b outer bottom surface

460 inclined part

461 curved surface

Claims (10)

1. A lighting fixture is provided with:

a light source;

a speaker unit provided on a side of the light source opposite to a light emitting direction; and

an appliance main body that houses the light source and the speaker unit,

the appliance main body has:

a first frame part having a bottomed tubular shape for supporting the light source therein;

a cylindrical second housing portion for accommodating the first housing portion therein;

a speaker unit that houses the speaker unit, the speaker unit forming a space to block a rear side sound emitted from the speaker unit; and

a plurality of heat radiating fins connecting an outer side surface of the first frame portion and an inner side surface of the second frame portion,

each of the plurality of fins is a plate parallel to the axial direction of the second frame portion,

the sound box portion extends to a side of the second housing portion when viewed from an axial direction of the second housing portion,

the bottom of the first frame body is convex toward the speaker unit.

2. The lighting fixture of claim 1, wherein the light source is a light source,

the bottom surface of the bottom portion, i.e., the surface on the speaker unit side, has a symmetrical shape with respect to the axis of the speaker unit.

3. The lighting fixture of claim 2, wherein the light source is a light source,

the bottom surface is in the shape of a sphere, an ellipsoid or the side of a convex polyhedron.

4. The lighting fixture of claim 1, wherein the light source is a light source,

the bottom is a flat convex shape having a height shorter than a width.

5. The lighting fixture of claim 1, wherein the light source is a light source,

a light emitting direction of the light source, a sound emitting direction of the speaker unit, an axial direction of the first housing portion, and an axial direction of the second housing portion are substantially coincident with each other.

6. The lighting fixture of claim 1, wherein the light source is a light source,

the lighting fixture further has an inclined portion,

the inclined portion is inclined from an end portion on a light exit side of the speaker unit toward an inner surface of the second housing portion.

7. The lighting fixture of claim 6, wherein the light source is a light source,

the inclined portion has a curved surface curved in a convex shape toward the speaker unit.

8. The lighting fixture of any one of claims 1 to 7,

the lighting fixture is a ceiling-embedded lighting fixture.

9. A lighting fixture is provided with:

a light source;

a speaker unit provided on a side of the light source opposite to a light emitting direction; and

an appliance main body that houses the light source and the speaker unit,

the appliance main body has:

a first frame part having a bottomed tubular shape for supporting the light source therein;

a cylindrical second housing portion for accommodating the first housing portion therein;

a speaker unit that houses the speaker unit, the speaker unit forming a space to block a rear side sound emitted from the speaker unit; and

a plurality of heat radiating fins connecting an outer side surface of the first frame portion and an inner side surface of the second frame portion,

each of the plurality of fins is a plate parallel to the axial direction of the second frame portion,

the sound box portion extends to a side of the second housing portion when viewed from an axial direction of the second housing portion,

the bottom of the first frame part is convex toward the speaker unit,

the bottom of the first housing portion is located closest to the speaker unit and forward of the front end of the speaker unit.

10. A lighting fixture is provided with:

a light source;

a speaker unit provided on a side of the light source opposite to a light emitting direction; and

an appliance main body that houses the light source and the speaker unit,

the appliance main body has:

a first frame part having a bottomed tubular shape for supporting the light source therein;

a cylindrical second housing portion for accommodating the first housing portion therein;

a speaker unit that houses the speaker unit, the speaker unit forming a space to block a rear side sound emitted from the speaker unit; and

a plurality of heat radiating fins connecting an outer side surface of the first frame portion and an inner side surface of the second frame portion,

each of the plurality of fins is a plate parallel to the axial direction of the second frame portion,

the sound box portion extends to a side of the second housing portion when viewed from an axial direction of the second housing portion,

the outer bottom surface of the bottom of the first frame body is convex toward the speaker unit.

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