JP7453010B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting device, and more particularly to a lighting device including a plurality of speaker units.

Conventionally, a configuration has been proposed in which a plurality of speakers such as a woofer and a tweeter are attached to a lighting device. For example, in Patent Document 1, a high-frequency speaker is placed in a suspended lighting section, and a low-frequency woofer is attached to a fixed section attached to the ceiling. This prevents shaking.

Japanese Patent Application Publication No. 2016-126114

As in the lighting device described in Patent Document 1, it is possible to improve the sound quality by providing a plurality of speakers such as a woofer and a tweeter that handle different bands. However, this increases the size of the lighting device itself, making it difficult to downsize it.

The present invention has been made based on the above problem, and aims to provide a lighting device that is equipped with a plurality of speaker units and can be downsized.

In order to achieve the above object, a lighting device according to one aspect of the present invention includes a speaker unit, a housing that houses the speaker unit, and a diaphragm of the speaker unit that surrounds a diaphragm of the speaker unit on a sound emission side of the speaker unit. an annular part that is arranged as shown in FIG. a forming body, a resonator that radiates sound in the same direction as the speaker unit, has an opening that communicates with the sound path, and forms a resonant space, a cover member that covers the front of the resonant space, and the resonant space. a light source disposed within.

Further, a lighting device according to another aspect of the present invention includes a speaker unit, a housing that accommodates the speaker unit, and a diaphragm of the speaker unit that is arranged on a sound emission side of the speaker unit so as to surround a diaphragm of the speaker unit. , an annular part that forms a sound path that guides the sound emitted by the speaker unit to the outside of the housing, and a sound path forming body that is arranged to separate the cylindrical sound path that is arranged inside the annular part. a resonance part that radiates sound in the same direction as the speaker unit, has an opening communicating with the sound path, and forms a resonance space; a cover member that covers the front of the resonance space; the opening gradually increases toward the front; The present invention includes a cover member having a horn structure that extends over the area, and a light source that emits light to an inner circumferential surface of the horn structure.

According to the present invention, although it is a lighting device, by arranging the light source in the resonance part, it is possible to emit sound with little change in sound quality depending on the listening position and to emit high-quality sound with little distortion. Become.

FIG. 1 is a perspective view showing the appearance of the lighting device in this embodiment. FIG. 2 is a perspective view showing the inside of the lighting device according to the present embodiment, with the cover member omitted. FIG. 3 is a cross-sectional view of the lighting device in this embodiment. FIG. 4 is a diagram for explaining the low frequency reproduction limit frequency. FIG. 5 is a sectional view showing another example 1 of the lighting device. FIG. 6 is a sectional view showing a lighting device with a horn. FIG. 7 is a sectional view showing a case where the horn-equipped lighting device is used as indirect lighting. FIG. 8 is a sectional view showing another example 2 of the lighting device.

Embodiments of a lighting device according to the present invention will be described below with reference to the drawings. Note that the numerical values, shapes, materials, components, positional relationships of the components, connection states, etc. shown in the following embodiments are merely examples, and do not limit the present invention. Furthermore, although multiple inventions may be described as one embodiment below, constituent elements not stated in a claim will be explained as being arbitrary constituent elements with respect to the claimed invention. ing. Further, the drawings are schematic diagrams with appropriate emphasis, omission, and ratio adjustment for explaining the present invention, and may differ from the actual shapes, positional relationships, and ratios.

FIG. 1 is a perspective view showing the appearance of the lighting device in this embodiment. FIG. 2 is a perspective view of the lighting device according to the present embodiment with the cover member removed. FIG. 3 is a sectional view showing the inside of the lighting device in this embodiment.

As shown in these figures, the lighting device 100 is a speaker in which two speaker units are arranged side by side in the front-rear direction (X-axis direction in the figures), a first speaker unit 101 and a second speaker unit 102. , a housing 111 , a sound path forming body 121 , an annular portion 103 , a resonance portion 104 , and a light source 105 .

The first speaker unit 101 is a speaker designed to emit sound in a lower range than the second speaker unit 102, and has a vibration system including a diaphragm 112, a voice coil 113, and a frame 114. , a field section having a yoke 115, a magnet 116, and a plate 117.

In the case of this embodiment, the first speaker unit 101 is housed in a housing 111 and is attached via an annular portion 103 to a cover member 118 that closes the front opening of the housing 111. Note that the first speaker unit 101 may be held by the housing 111 via a holding member or the like.

In this embodiment, the first speaker unit 101 is shown as a general speaker equipped with a cone-shaped diaphragm, but the first speaker unit 101 is not particularly limited, and other speakers may be used. It is possible to replace the speaker with

The second speaker unit 102 is a smaller speaker than the first speaker unit 101, and is designed to emit sound in a higher range than the first speaker unit 101. Like the first speaker unit 101, the second speaker unit 102 also includes a diaphragm, a voice coil, a frame, a yoke, a magnet, a plate, etc., but these are not shown.

The second speaker unit 102 is arranged in front of the diaphragm 112 of the first speaker unit 101 (on the negative side of the X-axis in the figure) so as to radiate sound in the same direction as the first speaker unit 101. Further, the second speaker unit 102 is housed and held in a sound path forming body 121 disposed between the second speaker unit 102 and the diaphragm 112 of the first speaker unit 101.

In the case of the present embodiment, the first speaker unit 101 and the second speaker unit 102 are arranged with the axes of their respective voice coils aligned, resulting in a so-called coaxial speaker arrangement.

In this embodiment, the second speaker unit 102 is shown as a general speaker, but the second speaker unit 102 is not particularly limited and can be replaced with another speaker.

The annular portion 103 is located on the sound radiation side (X-axis negative side in the figure) of the first speaker unit 101, that is, in front, and surrounds the diaphragm 112 of the first speaker unit 101 around the outside of the second speaker unit 102. It is an annular (cylindrical) member that is disposed in and guides the sound emitted by the first speaker unit 101 to the outside of the cover member via a cylindrical sound path 110.

In the case of this embodiment, the diaphragm 112 of the first speaker unit 101 has a cone shape, and the annular portion 103 has a cylindrical shape with an inner diameter that is approximately the same as the diameter of the bottom surface of the diaphragm 112. . Further, the annular portion 103 is provided with holes (or notches) at a plurality of locations (in the case of this embodiment, four locations) that function as openings 141 of the resonance section 104, which will be described later.

The resonance part 104 has an opening 141 that communicates with the sound path 110 and forms a resonance space 142. In the case of this embodiment, the resonance space 142 is formed by the annular part 103, the resonance part 104, and a part of the cover member 118, and is a closed space except for the opening 141 communicating with the sound path 110. There is.

Note that a part of the housing 111 may form the resonance space 142. Moreover, although the resonance part 104 is described as forming the resonance space 142 together with other members, the resonance space 142 may be formed only by the resonance part 104.

The size of the resonance space 142 formed in a closed state by the resonance part 104 and the size of the opening 141 are arbitrarily determined according to the frequency at which the sound passing through the sound path 110 resonates. In addition to the annular resonance space 142 surrounding the annular portion 103 as in the embodiment, a plurality of divided resonance spaces 142 may be provided.

Moreover, the number of openings 141 is also arbitrary, but it is desirable to provide them at a plurality of locations, and when they are provided at multiple locations, it is preferable to provide them evenly in the circumferential direction.

In the case of this embodiment, a sound absorbing material 143 (not shown in FIG. 2) is arranged in a resonance space 142 formed by the resonance section 104. Here, the sound absorbing material 143 is a member that amplifies acoustic resistance, and is made of a porous material. Here, the term "porous" includes not only a material having dispersed air bubbles, such as a resin sponge, but also a cotton-like material made of entangled fibers. By arranging the sound absorbing material 143 in the resonance space 142, it becomes possible to control the degree of resonance suppression by the resonance space 142.

Further, the material of the sound absorbing material 143 may be any material that transmits and scatters the light emitted from the light source 105 disposed in the resonance space 142, and examples thereof include transparent glass wool made of entangled fibers. Can be done.

The sound path forming body 121 is a member that is disposed inside the annular portion 103 and forms the cylindrical sound path 110 together with the annular portion 103 . The sound path forming body 121 also functions as a second casing for accommodating the second speaker unit 102 and forming an air chamber in the second speaker unit 102.

In the case of this embodiment, the sound path forming body 121 is provided with a back surface portion 122 (see FIG. 3) that follows the shape of the diaphragm on the surface facing the diaphragm 112 of the first speaker unit 101. The back surface portion 122 is arranged at a position as close as possible to avoid interference even when the diaphragm 112 of the first speaker unit 101 vibrates to radiate sound. Thereby, the sound radiated from the diaphragm 112 is effectively radiated to the outside of the cover member via the sound path 110.

The cover member 118 is a member that covers the front of the resonance space 142. In the case of this embodiment, the cover member 118 functions as a baffle plate that covers the front opening of the housing 111 and is also arranged on the entire surface of the sound path forming body 121. The cover member 118 holds the sound path forming body 121 and the second speaker unit 102. The cover member 118 is provided with a plurality of arc-shaped slits 130 arranged on the circumference that communicate with the sound path 110. It is supposed to be radiated to

In the case of this embodiment, the diameter D (see FIG. 3) of the slit 130 arranged on the circumference, that is, twice the inner radius of curvature of the slit 130, is the low frequency reproduction limit frequency of the second speaker unit 102. It is set to more than half of the wavelength calculated from . By setting in this way, it becomes possible to flatten the overall sound pressure characteristics of the sound radiated from the slit 130 and the sound radiated from the second speaker unit 102. For example, to give a specific example, if the low frequency reproduction limit frequency is fL=2000 Hz, the 2000 Hz wavelength is 344/2000=170 mm (344 is the speed of sound). Therefore, it is desirable that the diameter D is 85 mm or more, which is half the wavelength. Here, the low range reproduction limit frequency is the limit frequency of the low range that can be reproduced by the speaker unit, and as schematically shown in Figure 4, the sound pressure suddenly decreases as the reproduced frequency is lowered. The actual frequency fL is the low frequency reproduction limit frequency.

Furthermore, by making the front surface of the cover member 118 flush, the acoustic characteristics are improved. Further, the cover member 118 is formed by forming a slit 130 penetrating in the thickness direction in one circular plate material. Note that since the sound path forming body 121 is attached to the central part via the cover member 118 attached to the housing 111, the slit 130 is not formed into a complete annular shape but is divided by the connecting portion 131. .

The cover member 118 has translucency that allows the light emitted from the light source 105 to pass therethrough. The material of the cover member 118 is not particularly limited, and examples thereof include transparent resins such as acrylic resin, polycarbonate, and ABS resin, and glass. Further, a light distribution structure such as an uneven surface is provided on the surface of the cover member 118 in order to adjust the orientation.

Light source 105 is placed within resonance space 142 . In the case of the present embodiment, the light source 105 is attached to the inner surface of the rear side (the positive side in the X-axis direction in the figure) of the resonance section 104 so that light is emitted toward the cover member 118. The type of light source 105 is not particularly limited, and examples thereof include an LED (light emitting diode) and an OEL (organic electro-luminescence). In the case of this embodiment, an LED is employed as the light source 105, and a plurality of LEDs are attached to the bottom surface of the annular resonance section 104 in a line on the circumference. Further, a light conversion member 151 containing a fluorescent substance is arranged in front of the LED, and white light is generated by the light emitted from the LED and the light emitted by the light conversion member 151 using the light from the LED as excitation light. It is radiated. Further, the light source 105 emits light based on power from a power supply device 152 attached to the rear outer surface of the housing 111. Note that the power supply device 152 may be placed inside the housing 111.

As described above, according to the lighting device 100 according to the present embodiment, although it includes two speaker units, the light source 105 is arranged within the resonance space 142, thereby increasing the volumetric efficiency and providing high sound quality. This makes it possible to achieve Therefore, it is possible to embed it in the ceiling or wall of a room, making it possible to provide lighting and sounds such as music without sacrificing the indoor space.

Furthermore, since the two speaker units are coaxially arranged, the overall size can be made smaller, and the effect is that there is little change in sound quality depending on the listening position, as if the sound is radiated from a point sound source. can do.

Furthermore, it is possible to suppress the occurrence of cross-modulation distortion and emit high-quality sound. Specifically, while arranging the first speaker unit 101 and the second speaker unit 102 on the same axis, the sound generated from the first speaker unit 101 is radiated from a place a predetermined distance away from the second speaker unit 102. This suppresses the occurrence of cross-modulation distortion. Furthermore, while the sound path forming body 121 is disposed in front of the first speaker unit 101, by making the surface of the sound path forming body 121 facing the diaphragm 112 follow the shape of the diaphragm 112, the first speaker It becomes possible to efficiently guide the sound of the unit 101 to the sound path 110 and radiate the sound of the first speaker unit 101 from the slit with high efficiency. As a result of the above, it is possible to improve the quality of the overall sound emitted from the lighting device 100.

Note that the present invention is not limited to the above embodiments. For example, the embodiments of the present invention may be realized by arbitrarily combining the components described in this specification or by excluding some of the components. The present invention also includes modifications obtained by making various modifications to the above-described embodiments that a person skilled in the art can conceive without departing from the gist of the present invention, that is, the meaning of the words written in the claims. It will be done.

For example, the resonance space 142 may exist at least either outside or inside the sound path 110. As shown in FIG. 5, the resonance space 142 existing inside the sound path 110 may be formed in a closed state except for the opening 141 by the sound path forming body 121 and the cover member 118. Further, the resonance space 142 may be formed by the cover member 118 and the resonance section 104 independent from the casing or the like. In this way, when a plurality of resonance spaces 142 exist, the light source 105 only needs to be placed in at least one of the resonance spaces 142, and may be placed in all of the resonance spaces 142.

Further, as shown in FIG. 6, the cover member 118 may include a horn structure portion 181 whose opening gradually widens toward the front. Thereby, light diffusivity can be improved. Further, it is possible to suppress the spread of sound and increase the volume within a predetermined range.

Alternatively, as shown in FIG. 7, the lighting device 100 may include a light source 105 that emits light onto the inner peripheral surface of the horn structure 181. This allows indirect lighting.

Furthermore, as shown in FIG. 8, the lighting device 100 may not include the second speaker unit.

In addition to the case where the sound absorbing material 143 is used to scatter light, the cover member 118 may include a light diffusing structure. Specifically, examples include a mode in which small diameter beads for scattering light are distributed inside the cover member 118, and a mode in which the surface of the cover member 118 is roughened to have a frosted glass appearance.

Further, the diameter of the circumference in which the slit 130 of the cover member 118 is arranged may be smaller or larger than the diameter of the diaphragm 112 of the first speaker unit 101.

Moreover, although the shape of the diaphragm 112 of the first speaker unit 101 has been described as a cone shape, the shape of the diaphragm of the speaker unit is not particularly limited, and the speaker unit may include a flat diaphragm. Further, the shape of the diaphragm is not limited to circular or elliptical shapes, but may be rectangular.

Furthermore, although the casing and the cover member 118 have been described as separate bodies, they may be integrated. Further, the center portion and the peripheral portion of the cover member 118 may be separate members.

Further, although the case 111 has been described as an independent case, the case 111 may be shared with a case of an electronic device such as a television or a computer, or may be shared with a structure of a moving body such as a car or an airplane. I don't mind if you do.

The present invention can be applied to a lighting device that can reproduce audio signals such as music.

100 Illumination device 101 First speaker unit 102 Second speaker unit 103 Annular part 104 Resonance part 105 Light source 110 Sound path 111 Housing 112 Diaphragm 113 Voice coil 114 Frame 115 Yoke 116 Magnet 117 Plate 118 Cover member 121 Sound path forming body 122 Back surface part 130 Slit 131 Connection part 141 Opening 142 Resonance space 143 Sound absorbing material 151 Light conversion member 152 Power supply device 181 Horn structure part

Claims (8)

speaker unit,
a housing that accommodates the speaker unit;
a resonance part forming an annular resonance space disposed on a sound emission side of the speaker unit so as to surround a diaphragm of the speaker unit;
a cover member that covers the front of the resonance space;
a plurality of light sources arranged in the resonance space,
The resonance part is
an annular portion forming a sound path that guides sound emitted by the speaker unit to the outside of the housing;
a sound path forming body disposed across the cylindrical sound path disposed inside the annular portion;
an opening that emits sound in the same direction as the speaker unit and communicates with the sound path,
The light source is
A lighting device installed in line within the annular resonance section . The lighting device includes:
The speaker unit includes a first speaker unit and a second speaker unit that emits sound in the same direction as the first speaker unit,
The annular portion is
a sound path that is arranged on a sound emission side of the first speaker unit so as to surround a diaphragm of the first speaker unit, and that guides the sound emitted by the first speaker unit to the outside of the housing;
The sound path forming body is
The lighting device according to claim 1, which houses the second speaker unit. The cover member is
The illumination device according to claim 1 or 2, having translucency that transmits light emitted from the light source. The lighting device according to any one of claims 1 to 3, wherein the cover member includes a light diffusion structure. The lighting device according to any one of claims 1 to 4, wherein the cover member includes a light distribution structure. The lighting device according to any one of claims 1 to 5, further comprising a light-transmitting sound absorbing material between the light source and the cover member. The lighting device according to any one of claims 1 to 6, wherein the cover member includes a horn structure whose opening gradually widens toward the front. The cover member has a horn structure portion whose opening gradually widens toward the front,
The light source emits light onto an inner peripheral surface of the horn structure.
A lighting device according to any one of claims 1 to 7 .

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