Acoustic device

Abstract

Provided is an acoustic device capable of effectively propagating sound waves to a human body, said sound waves having lines of a three-dimensional network structure as a medium. The sound device comprises a three-dimensional network structure body which is formed by randomly looping or curling lines formed by elastic resin, mutually welding, and entangling and gathering; the at least one loudspeaker is used for generating the sound waves; and a plate-shaped resonance plate. The speaker has a vibration part provided facing the inner surface of the three-dimensional network structure. A front-side member, an intermediate member, and an inner-side member are provided in this order from the front surface toward a rear surface facing the front surface and farther from the inner surface from the front surface, the front-side member being harder than the intermediate member, and the inner-side member being harder than the front-side member.

Description

Technical Field

[0001] The invention relates to an audio device. Background Art

[0002] A sound system in which a speaker is embedded in a cushion of a chair or the like is known. Patent Document 1 below describes a sound system that is configured as a three-dimensional mesh structure composed of randomly bent or looped thermoplastic resin lines to transmit sound waves from the speaker to the back of the upper body of a human body.

[0003] (Prior art literature)

[0004] (Patent Document)

[0005] (Patent Document 1) Japanese Patent No. 4907991 Summary of the invention

[0006] Technical issues to be solved

[0007] In the audio system described in the present patent document 1, the sound waves of the speaker are transmitted to the human body (especially the back) through the lines that constitute the three-dimensional network structure, thus becoming similar to the state in which the vibration of the strings of a musical instrument is directly transmitted to the human body, and a deeper physical and mental relaxation effect can be obtained compared with only perceiving the sound through the air as the medium.

[0008] However, the sound waves generated by the speaker will propagate not only to the three-dimensional mesh structure, but also to the housing or chassis on which the speaker is installed. In the sound system described in Patent Document 1, if the propagation of sound waves from components other than such a three-dimensional mesh structure is not considered, it is easy for sound waves to propagate from these components to parts other than the back and for sound to propagate through air, resulting in the above-mentioned relaxation effect caused by the propagation of sound waves through the lines of the three-dimensional mesh structure to the human body (particularly the back) being easily reduced.

[0009] Means of solving the problem

[0010] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an acoustic device capable of effectively propagating sound waves using lines of a three-dimensional mesh structure as a medium to a human body.

[0011] The sound device of the present invention is a sound device for transmitting sound waves to a human body, and the sound device comprises: a three-dimensional mesh structure, in which lines formed of elastic resin are randomly looped or curled, fused to each other, and entangled together; at least one speaker, for generating the sound waves; and a plate-shaped resonance plate, the three-dimensional mesh structure comprising: a surface, in direct or indirect contact with the human body; and an inner surface, arranged opposite to the surface, the speaker comprising: a vibration part, arranged opposite to the inner surface of the three-dimensional mesh structure; and a frame part, which holds the vibration part in a vibrating manner, the frame part being mounted on one side of the resonance plate by an elastic mounting material, the three-dimensional mesh structure being provided with a surface side component, an intermediate component, and an inner side component in sequence from the surface toward the back side facing the surface and away from the surface from the inner surface, the surface side component being harder than the intermediate component, and the inner side component being harder than the surface side component.

[0012] Preferably, the three-dimensional mesh structure includes an inner side surface, which surrounds the speaker between the inner surface and the back surface, and the speaker is accommodated in an internal space surrounded by the inner surface of the three-dimensional mesh structure, the inner side surface and one side surface of the resonance plate.

[0013] Preferably, the inner face is located within the intermediate component.

[0014] Preferably, the thickness of the intermediate component and the inner component are substantially the same.

[0015] Preferably, the surface member is thinner than the middle member and the inner member.

[0016] Preferably, the surface side component 71 is composed of a hollow linear body, the middle component 81 is composed of a non-hollow linear body, and the inner side component 72 is composed of a non-hollow linear body and the outer diameter of the linear body is smaller than the outer diameter of the surface side component.

[0017] Preferably, the distance between the speaker and the inner surface is 1 / 10 to 1 / 5 of the thickness of the intermediate component.

[0018] Preferably, the back surface of the three-dimensional network structure is mounted on one side surface of the resonance plate through the mounting material.

[0019] Preferably, the mounting material is a thermoplastic elastomer or glue containing ethylene vinyl acetate copolymer.

[0020] Preferably, the frame part includes a circular flat bottom surface, a concave part is formed in the center of the bottom surface, and the frame part is mounted on one side surface of the wooden board by the mounting material placed in the concave part and the mounting material placed on at least a part of the outer edge part of the bottom surface.

[0021] Preferably, there are a plurality of the speakers, and the resonance plate includes: a plurality of the wooden boards corresponding one-to-one to the plurality of the speakers, and a board member on which the plurality of the wooden boards are mounted. The frame part of each speaker is mounted on one side surface of the corresponding wooden board through the mounting material, and the other side surface of the wooden board facing the one side surface on which the frame part is mounted is mounted on one side surface of the board member through the mounting material.

[0022] Effects of the Invention

[0023] According to the present invention, an audio device capable of effectively transmitting sound waves using the lines of a three-dimensional network structure as a medium to the human body can be provided. Description of the Drawings

[0024] Figure 1 It is a diagram showing an example of the structure of an audio system according to the present embodiment.

[0025] Figure 2 It is shown in Figure 1 In the audio system shown, it is a diagram showing a state where the audio device is removed from the main body part.

[0026] Figure 3A It is a diagram showing an example of the appearance of an audio device according to the present embodiment.

[0027] Figure 3B It is a cross-sectional view showing an example of the structure of the audio device.

[0028] Figure 4A It is a cross-sectional view showing an example of the structure of the speaker.

[0029] Figure 4B It is a diagram showing a state where the speaker is mounted on the resonance plate.

[0030] Figure 5 It is a diagram showing an example of a resonance plate on which a plurality of speakers are mounted.

[0031] Figure 6 It is a cross-sectional view showing an example of the structure of the pad member.

[0032] (Explanation of Reference Numerals)

[0033] 1: Audio system 2: Audio device 21: Storage bag

[0034] 3: Main body part 31: Seat part 32: Seat cushion

[0035] 33: backrest 330: support surface 331: holding part

[0036] 332: hole 333: support frame 334: buffer component

[0037] 34: Side 35: Armrest 36: Leg rest

[0038] 4: Pad member 41: First plate member 42: Second plate member

[0039] 421: Upper plate member 422: Lower plate member 423: Elastic sheet

[0040] 43: Buffering member 44: Covering member 5: Speaker

[0041] 5A to 5G: Speaker 51: Vibration unit 511: Vibration plate

[0042] 512: Voice coil 52: Frame 521: Bottom

[0043] 522: Recessed part 523: Outer edge part 53, 54: Support part

[0044] 55: yoke 56: magnet 57: protective cover

[0045] 6: Resonance board 61: Wood board 611: Surface

[0046] 62A to 62F, 62: wooden board 621, 622: surface 63: board member

[0047] 631: Surface 64: Metal plate 641, 642: Surface

[0048] 7: Three-dimensional network structure 70: Lines 71: Surface side member

[0049] 72: inner part 73: surface 74, 77: inner surface

[0050] 75: Back 76: Inner side 8: Installation material

[0051] 81: Middle part. DETAILED DESCRIPTION

[0052] The inventor of the present application who developed the sound system of the above-mentioned patent document 1, while conducting in-depth research on a sound system with a higher relaxation effect and health promotion effect, paid attention to the importance of sound waves propagating to components other than the three-dimensional mesh structure. In addition, the inventor of the present application conceived the present invention as a result of various ingenuities on the components for fixing the speakers and the method for fixing them and the method for controlling the sound waves propagating to the ground, so that the sound waves can be effectively propagated to the human body through the lines of the three-dimensional mesh structure.

[0053] Hereinafter, an acoustic system according to an embodiment of the present invention will be described with reference to the drawings.

[0054] Figure 1 1 is a diagram showing an example of the structure of an audio system according to the present embodiment. The audio system according to the present embodiment is a system having a support surface for supporting the back of the upper body of a human body (particularly the back) and transmitting sound waves from the support surface to the human body, and can be applied to, for example, a chair or a bed. Figure 1 The illustrated sound system 1 is an example of the present embodiment applied to a chair.

[0055] like Figure 1 As shown, the present audio system 1 comprises: a main body 3 having a support surface 330 for supporting at least the back of a human body; and a cushion member 4, which is plate-shaped and is used to place the main body 3. The main body 3 is a sofa-type chair, having a seat 31 for supporting the buttocks, a seat cushion 32 arranged on the seat 31, a backrest 33 for supporting the back, two side portions 34 sandwiching and supporting the seat 31 from the left and right sides, armrest portions 35 respectively arranged on the two side portions 34, and a leg rest portion 36 protruding obliquely downward on the front side of the seat 31.

[0056] like Figure 2 As shown, the acoustic device 2 for transmitting sound waves to the human body on the support surface 330 is embedded in the backrest portion 33 of the main body portion 3 . Figure 2 3 is a diagram showing a state where the audio device 2 is removed from the backrest portion 33 of the main body portion 3. The backrest portion 33 has a holding portion 331 for holding the audio device 2. Figure 2 In the example of FIG. 3 , the holding portion 331 includes a hole 332 extending from the front side to the back side of the backrest portion 33 and a support frame 333 provided at an opening on the back side of the hole 332. Figure 1 As shown, the audio device 2 is inserted into the hole 332. The support frame 333 supports the outer surface of the audio device 2 inserted into the hole 332 from the back side. Figure 2 In the example of FIG. 1 , a plurality of rod-shaped support frames 333 span the opening portion on the back side of the hole 332 in the horizontal direction.

[0057] like Figure 2 As shown, a buffer component 334 is provided at the portion where each support frame 333 contacts the audio device 2. The buffer component 334 is formed of an elastic material such as glass wool. In addition, the hole 332 of the backrest 33 that contacts the audio device 2 is an elastic cushion, and elastically clamps and holds each side of the audio device 2. That is, the holding portion 331 of the backrest 33 holds the audio device 2 through an elastic component (buffer component 334, cushion of hole 332).

[0058] The holding portion 331 of the main body 3 holds the audio device 2 by an elastic member, so that the sound waves generated by the speakers 5A to 5G of the audio device 2 are difficult to directly propagate to the main body 3. Accordingly, the sound waves generated by these speakers are easily propagated to the human body through the three-dimensional mesh structure 7 described later.

[0059] Figure 3A FIG. 2 is a diagram showing an example of the appearance of the audio device 2 according to the present embodiment. Figure 3A In the example of , the audio device 2 has a substantially rectangular parallelepiped shape. When the audio device 2 is embedded in the backrest 33, one of the outer surfaces of the audio device 2 becomes a support surface 330, thereby supporting the back of the human body. The audio device 2 has a storage bag 21 that stores various components therein and covers the outside. The storage bag 21 is made of cloth, for example, and the portion corresponding to the support surface 330 is made of mesh cloth.

[0060] exist Figure 3A In the example of , the audio device 2 has seven speakers 5A to 5G. The seven speakers 5A to 5G are configured so as to emit sound waves from the support surface 330 to the outside. Among the seven speakers 5A to 5G, six speakers 5A to 5F (hereinafter, referred to as "speakers 5" without distinction) are speakers of the same type, and only speaker 5G is a bass speaker that is larger in size than the other speakers 5. When viewed from a direction perpendicular to the support surface 330, the six speakers 5 are divided into two rows arranged in the horizontal direction, and three speakers 5 are arranged in the vertical direction in each row. In the horizontal direction, the bass speaker 5G is located approximately in the middle of the two rows of speakers 5, and in the vertical direction, it is located at a position closer to the lower side than the speakers 5. When the user sits on the main body 3 in a normal posture, the two rows of speakers 5 are located on both sides of the spine, and the bass speaker 5G is located on the pelvic side close to the spine.

[0061] Figure 3B 2 is a cross-sectional view showing an example of the structure of the audio device 2, showing a cross section of the speaker 5 cut along a plane perpendicular to the support surface 330. Figure 3B As shown, the acoustic device 2 includes a three-dimensional mesh structure 7 which is a collection of wires 70 and a plate-like resonance plate 6 .

[0062] The three-dimensional network structure 7 is formed by randomly looping or curling, mutually fused, and entangled lines 70 formed of elastic resin. The resin that becomes the raw material of the line 70 is, for example, thermoplastic resin, general plastic (polyolefin, polystyrene resin, methacrylic resin, polyvinyl chloride, etc.), engineering plastic (polyamide, polycarbonate, saturated polyester, polyacetal, etc.), etc. Thermoplastic resin is preferably a thermoplastic elastomer. Thermoplastic elastomer is particularly preferably a polyolefin resin such as polyethylene (PE) and polypropylene (PP), or vinyl acetate resin (VAC), ethylene vinyl acetate copolymer (EVA) or styrene-butadiene-styrene (SBS), etc., and can also be a mixture thereof. Thermoplastic resin is not limited to newly purified resin, and can also be recycled resin.

[0063] When a polyolefin resin and a vinyl acetate resin of VAC or EVA are mixed to form the line 70, the mixing ratio is polyolefin resin:vinyl acetate resin=70-97 wt %:3-30 wt %, preferably 80-90 wt %:10-20 wt %. This is because when VAC or EVA is 3 wt % or less, the rebound resilience is reduced, and when it is 30 wt % or more, the thermal characteristics are reduced.

[0064] When the polyolefin resin and SBS are mixed to form the line 70, the mixing ratio is polyolefin resin:SBS=50-97 wt%:3-50 wt%, preferably 70-90 wt%:10-30 wt%.

[0065] All or part of the wires 70 constituting the three-dimensional network structure 7 may be hollow, solid, or a mixture of the two. From the viewpoint of weight reduction, it is preferred that the wires 70 be hollow. By setting the wires 70 to be hollow structures, the thickness of the resin portion can be reduced compared to solid wires 70 having the same diameter, so that high-frequency vibrations can be easily transmitted. That is, the hollow wires 70 have high rigidity and low vibration attenuation.

[0066] When the solid lines 70 and the hollow lines 70 are mixed, the mixing ratio is preferably solid: hollow = 0-50: 50-100.

[0067] As for the solid wire 70, the wire diameter (diameter) of the wire 70 can be set to 0.3 to 3.0 mm, preferably 0.7 to 1.0 mm. As for the solid wire 70, when the wire diameter is 0.3 mm or less, the elasticity of the wire 70 becomes poor, so that the welded parts increase and the void ratio decreases, and when the wire diameter is 3.0 mm or more, the elasticity of the wire 70 becomes strong, it is not easy to form a loop, and the welded parts decrease, and the strength decreases.

[0068] On the other hand, as for the hollow lines 70, the line diameter of the lines 70 can be 1.0 to 3.0 mm, preferably 1.5 to 2.0 mm, and particularly preferably 0.9 to 1.3 mm. The hollow lines 70 preferably have a hollow ratio of 10% to 80%. This is because a hollow ratio of less than 10% does not contribute to weight reduction, and a hollow ratio of more than 80% reduces cushioning properties. In addition, the hollow portion formed in the lines 70 may not be continuous.

[0069] From the viewpoint of reducing weight while having the elasticity and strength required as a cushion, the three-dimensional network structure 7 preferably has a predetermined bulk density and porosity. Here, the porosity is:

[0070] [Void ratio (%)]=(1-[bulk density] / [resin density])×100.

[0071] like Figure 3B As shown, the three-dimensional network structure 7 includes, for example, a surface side member 71 , an intermediate member 81 , and an inner member 72 arranged in this order from the surface 73 to the back surface 75 .

[0072] The surface side member 71 is hollow fiber, the middle member 81 is ultra-fine straw fiber (ultra-fine mesh structure mat), and the inner side member 72 is straw fiber (mesh structure mat).

[0073] The surface side member 71 is composed of a hollow linear body.

[0074] By making the surface side member 71 hollow, the sound diffused by the intermediate member 81 can be collected and propagated to the surface.

[0075] The intermediate member 81 is composed of a non-hollow linear body (extra-mesh fiber).

[0076] The inner member 72 is composed of a non-hollow linear body (multi-mesh fiber), and the outer diameter of the linear body is smaller than the outer diameter of the surface side member 71 .

[0077] The thickness of the intermediate member 81 and the inner member 72 are substantially the same, for example, about 50 mm.

[0078] The thickness of the surface side member 71 is thinner than that of the intermediate member 81 and the inner member 72, and is, for example, approximately 40 mm.

[0079] The surface side member 71 is harder than the intermediate member 81 . In addition, the inner member 72 is harder than the surface side member 71 .

[0080] Specifically, the surface side member 71 is a hollow straw fiber with a diameter (outer diameter) of 2.0 mm and a bulk density of 0.2 to 0.5 g / cm 3, preferably 0.3 to 0.4 g / cm 3 The porosity is 44 to 77%, preferably 56 to 67%.

[0081] The middle part 81 is a very fine mesh structure mat with a diameter of 0.6 mm and a bulk density of 0.01 to 0.15 g / cm 3 , preferably 0.03 to 0.05 g / cm 3 The porosity is 83 to 99%, preferably 94 to 97%.

[0082] The inner member 72 is a mesh structure mat with a diameter of 1.0 mm and a bulk density of 0.2 to 0.5 g / cm 3 , preferably 0.3 to 0.4 g / cm 3 The porosity is 44 to 77%, preferably 56 to 67%.

[0083] The bulk density and porosity of the inner member 72 are approximately the same as those of the surface-side member 71 , but since it is not hollow, it is harder than the surface-side member 71 .

[0084] Since the outer diameter of the inner member 72 is smaller than the outer diameter of the surface side member 72, the sound is diffused largely and the reverberation is increased in a more intensive form.

[0085] The inner surface 74 is located on the intermediate part 81 .

[0086] In this way, by locating the inner surface 74 in the middle component 81 which is softer than the surface side component 71 and the inner component 72, the sound from the speaker 5 can be effectively introduced into the middle component 81 and propagated toward the support surface 330 as a soft sound, compared with the case where the same material as the inner component 72 is set in the area of ​​the middle component 81.

[0087] That is, by making the surface side member 71 harder than the intermediate member 81 , it is possible to amplify sound within the surface side member 71 which is straw-like fiber and diffuse the sound to the support surface 330 .

[0088] In addition, the armrest part next to the back of the sound system (chair) becomes a soundboard like a musical instrument, so it can further resonate and output waves to the front.

[0089] By making the front side member 71 softer than the inner side member 72, the cushioning property of the support surface 330 that supports the human body can be improved.

[0090] By providing the intermediate member 81 that is lower than the surface-side member 72 between the surface-side member 72 and the inner member 72 , it is possible to diffuse softer sound and realize a cushioning property having a certain degree of hardness, compared with a case where the intermediate member 81 is not provided.

[0091] Furthermore, since the inner member 72 is hard, the stability of the device can be ensured.

[0092] The distance H between the upper end 87 of the speaker 5 and the inner surface 74 is 1 / 10 to 1 / 5 of the thickness of the intermediate member 81 .

[0093] By leaving a sufficient distance H, the sound from the speaker 5 spreads widely and evenly over the entire support surface 330 .

[0094] The back surface 75 of the inner member 72 is mounted to one side surface of the resonance plate 6 via a mounting material.

[0095] By increasing the packing density of the outer layer, the welding force between the wires 70 is strengthened, so that the pressure when receiving an external force becomes easy to disperse, and it is difficult to apply a large external force to the speakers 5A to 5G arranged inside the three-dimensional mesh structure 7. In addition, by increasing the packing density of the inner member 75, the unevenness of the back surface 75 is reduced and becomes smooth, so that the three-dimensional mesh structure 7 and the resonance plate 6 can be stably installed by the mounting material 8 described later.

[0096] The thickness of the three-dimensional mesh structure 7 is not particularly limited as long as it can exert the strength and elasticity required to support the human body, but it is at least set to have a thickness required to embed the speakers 5A to 5G in the three-dimensional mesh structure 7. The three-dimensional mesh structure 7 can be formed into any shape and size by methods such as fusion, mechanical cutting or hot pressing.

[0097] like Figure 3B As shown, the three-dimensional network structure 7 has a surface 73 that indirectly contacts the human body through the support surface 330 of the storage bag 21, and an inner surface 74 that faces the surface 73. The inner surface 74 faces the vibration part 51 of the speaker 5 described later.

[0098] In addition, if Figure 3B As shown, the three-dimensional network structure 7 has a back surface 75 disposed opposite to the surface 73. The back surface 75 is farther from the surface 73 than the inner surface 74, and is mounted on one side surface 611 of the resonance plate 6 through the mounting material 8.

[0099] Further, if Figure 3B As shown, the three-dimensional network structure 7 has an inner side surface 76 surrounding the speaker 5 between the inner surface 74 and the back surface 75. The speaker 5 is accommodated in an internal space surrounded by the inner surface 74 and the inner side surface 76 of the three-dimensional network structure 7 and the surface 611 of the resonance plate 6.

[0100] Inner member 72 has through holes for arranging speakers 5A to 5G. Through holes of inner member 72 where speakers 5 are located form inner side surfaces 76 surrounding speakers 5. Surface member 71 closes the openings of each through hole on the support surface 330 side to form an inner space 83.

[0101] The surface of the surface side member 71 close to the support surface 330 is the surface 73, and the surface of the surface side member 71 located on the opposite side of the surface 73 (the surface facing the surface 73) is the inner surface 74. The inner surface 74 of the intermediate member 81 is disposed face to face with the vibration part 51 of the speaker 5 disposed in the internal space 83 having the through hole.

[0102] Figure 4A 2 is a cross-sectional view showing an example of the structure of the speaker 5. The speaker 5 includes: a vibration part 51 disposed face to face with the inner surface 74 of the three-dimensional mesh structure 7; and a frame part 52 for holding the vibration part 51 in a vibrating manner. Figure 4A In the example of , the vibration part 51 includes a cone-shaped vibration plate 511 and a voice coil 512 installed near the center of the vibration plate 511. The side of the vibration plate 511 near the center is connected to the frame part 52 through an annular support part 53. The side of the vibration plate 511 near the outer edge is connected to the frame part 52 through an annular support part 54 having a larger diameter than the support part 53. Both the support part 53 and the support part 54 are elastically deformable and allow the vibration plate 511 to vibrate relative to the frame part 52. A cylindrical yoke 55 is arranged inside the voice coil 512. The frame part 52 is the same magnetic body as the yoke 55, and a magnetic flux generated by a magnet 56 is generated in the yoke 55 and the frame part 52. When the magnetic flux acts on the current of the voice coil 512 located between the frame part 52 and the yoke 55, an electromagnetic force corresponding to the audio signal superimposed on the current acts on the voice coil 512, so that the vibration plate 511 vibrates corresponding to the audio signal. The vibration direction of the vibration plate 511 is a direction substantially perpendicular to the front surface 73 and the inner surface 74 of the three-dimensional network structure 7 which are substantially parallel planes to each other.

[0103] exist Figure 4A In the example of FIG. 5 , the frame portion 52 has a substantially circular flat bottom surface 521 . A recessed portion 522 is formed in the center of the bottom surface 521 .

[0104] Figure 4B 2 is a diagram showing a state where the speaker 5 is mounted on the resonance plate 6. Figure 4B As shown, the frame portion 52 of the speaker 5 is mounted on one side 611 of the resonance plate 6 via an elastic mounting material 8. The mounting material 8 is preferably a material having appropriate elasticity even in a cured state, for example, preferably a thermoplastic elastomer containing ethylene vinyl acetate copolymer (EVA), glue, etc.

[0105] The frame portion 52 and the resonance plate 6 are mounted by the elastic mounting material 8, and compared with the case where they are fixedly connected by bolts, etc., it is possible to make it difficult for sound waves (especially high-frequency components) to propagate from the frame portion 52 to the resonance plate 6. Therefore, the sound waves (having relatively high-frequency components) generated by the speaker 5 can be effectively propagated from the lines 70 of the three-dimensional mesh structure 7 to the human body.

[0106] Furthermore, the sound waves with a relatively low frequency that are transmitted from the frame portion 52 to the resonance plate 6 through the mounting material 8 are likely to resonate in the resonance plate 6 having a width and height that can be easily arranged facing the back of the human body (approximately several cm to several tens of cm), so the sound waves are amplified by the resonance plate 6 and are easily transmitted to the three-dimensional mesh structure 7. Accordingly, even the sound waves with a relatively low frequency generated by the speaker 5 can be effectively transmitted to the human body from the lines 70 of the three-dimensional mesh structure 7. In particular, by mounting the back surface 75 of the three-dimensional mesh structure 7 on the surface 611 of the resonance plate 6 by the mounting material 8, the sound waves amplified by the resonance plate 6 are easily transmitted to the three-dimensional mesh structure 7, so the sound waves can be more effectively transmitted from the three-dimensional mesh structure 7 to the human body.

[0107] exist Figure 4B In the example of FIG. 1 , the resonance board 6 is composed of a wooden board 61 . As the material of the wooden board 61 , for example, plywood such as wood core can be used. The frame portion 52 of each speaker 5 is mounted on one side 611 of the wooden board 61 through the mounting material 8 .

[0108] For example, Figure 4B As shown in FIG. 5 , the frame portion 52 is mounted on one side 611 of the wooden board 61 by placing the mounting material 8 in the recessed portion 522 of the bottom surface 521 and the mounting material 8 in at least a portion of the outer edge portion 523 of the bottom surface 521. By placing the mounting material 8 in the recessed portion 522 of the bottom surface 521, it is possible to reliably prevent the central portion of the bottom surface 521 of the frame portion 52 from directly contacting the surface 611 of the wooden board 61. In addition, the range of the surface 611 of the wooden board 61 mounted can be easily controlled in the outer edge portion 523 of the bottom surface 521, so that it becomes easy to adjust the intensity and frequency of the sound waves propagating from the frame portion 52 to the resonance plate 6.

[0109] Figure 5 This is a diagram showing an example of a resonance board 6 (wooden board 61) on which a plurality of speakers (5A to 5G) are mounted, and is a diagram viewed from a direction perpendicular to the flat surface of the resonance board 6 (wooden board 61).

[0110] Figure 5 The planar shape of the wooden board 61 is a rectangle. In one example, the dimensions of the wooden board 61 are 400 mm in width, 650 mm in length, and 13 mm in thickness, and a plurality of speakers (5A to 5G) are mounted on one wooden board 61.

[0111] Figure 6 This is a cross-sectional view showing an example of the structure of the cushion member 4 on which the main body portion 3 is placed, showing a cross-section cut along a vertical plane. For example, as Figure 6 shown, the cushion member 4 includes a first plate member 41 and a second plate member 42 that are both plate-like members, and a cushion member 43. The second plate member 42 is disposed below the first plate member 41, and the cushion member 43 is inserted between the first plate member 41 and the second plate member 42. The first plate member 41 is a wooden plate member such as plywood. In one example, the thickness of the first plate member 41 is 55 mm. The cushion member 43 is formed of an elastic material, such as glass wool or asbestos. In one example, the thickness of the cushion member 43 is 20 mm. In one example, the planar shapes of the first plate member 41 and the second plate member 42 are rectangles of the same size, and the length of the vertical side is 800 mm and the length of the horizontal side is 840 mm. The upper surface of the first plate member 41 is covered with a covering member 44 such as a carpet.

[0112] A part of the sound waves generated by the speakers 5A to 5G of the audio device 2 is transmitted to the cushion member 4 through the main body portion 3 and the human body. However, the first plate member 41 of the cushion member 4 is supported by the lower second plate member 42 through the cushion member 43, and the entire first plate member 41 becomes more likely to vibrate relative to the second plate member 42 and the ground. Therefore, it is possible to make it difficult for the sound waves to be transmitted from the first plate member 41 to the ground. In addition, when the first plate member 41 vibrates due to sound waves (especially low-frequency components), the vibration is easily transmitted to the human body through the toes in contact with the cushion member 4 and the main body portion 3, so that a comfortable vibration caused by the sound waves generated by the audio device 2 can be provided to the entire body of the user.

[0113] For example, as Figure 6 shown, the second plate member 42 includes a wooden upper side plate member 421 disposed facing the cushion member 43, a wooden lower side plate member 422 disposed below the upper side plate member 421, and an elastic sheet 423 inserted between the upper side plate member 421 and the lower side plate member 422. In one example, the upper side plate member 421 is a medium-density fiberboard (MDF) with a thickness of 12 mm, the lower side plate member 422 is a particle board with a thickness of 20 mm, and the elastic sheet 423 is a rubber sheet with a thickness of 3 mm. According to such a structure, it is possible to suppress the transmission of vibration from the upper side plate member 421 to the lower side plate member 422 through the elastic sheet 423 such as rubber, so that it is difficult for the vibration of the first plate member 41 generated by the sound waves to be transmitted to the ground.

[0114] As described above, according to the structure shown in FIG. 3, the audio system 1 can diffuse the sound from the speaker 5 in the internal space 83 and make it a soft sound and effectively diffuse it in the intermediate member 81.

[0115] Furthermore, the shape of the internal space 83 can be stably maintained by the hard inner member 72 .

[0116] When using the above-mentioned sound system 1, the user sits on the seat 31 of the main body 3 and leans his back against the support surface 330, so that sound waves such as music and ambient sound are generated from the speakers 5A to 5G. At this time, by reducing the frequency of the sound waves to the same level as that of the speaker 5 located at the lower side of the back, physiological pleasure and massage effect can be obtained.

[0117] According to the present embodiment, the frame portion 52 and the resonance plate 6 of the speaker 5 are installed by means of an elastic mounting material 8, thereby making it difficult for high-frequency sound waves to propagate from the frame portion 52 to the resonance plate 6, and making it easy for low-frequency sound waves propagating from the frame portion 52 to the resonance plate 6 to resonate in the resonance plate 6, thereby making it possible for the sound waves to be effectively propagated from the lines 70 of the three-dimensional mesh structure 7 to the human body.

[0118] In addition, according to this embodiment, the first plate member 41 of the pad member 4 is supported by the second plate member 42 on the lower side through the buffer member 43, and the first plate member 41 as a whole becomes easy to vibrate relative to the second plate member 42 and the ground, so that the vibration caused by the sound waves generated by the audio device 2 can be transmitted to the entire body.

[0119] Furthermore, according to the present embodiment, the retaining portion 331 of the main body 3 retains the audio device 2 by means of an elastic component, so that the sound waves generated by the speaker 5 of the audio device 2 become difficult to propagate to the main body 3 side, thereby making it easy for the sound waves using the lines 70 of the three-dimensional mesh structure 7 as a medium to propagate to the human body.

[0120] Furthermore, the present invention is not limited to the above-described embodiment but includes various modifications.

[0121] For example, in the above embodiment, the audio device 2 is provided with seven speakers (5A to 5G), but the number of speakers may be 6 or less, or 8 or more. Figure 4B Cone types are shown, other speaker types may also be used.

[0122] The dimensions, materials, and the like of the components described in the above-described embodiments are examples and can be appropriately changed.

Claims

1. An audio device that transmits sound waves to a human body, wherein: The audio device comprises: The three-dimensional network structure is formed by the lines formed by elastic resin randomly looping or curling, welding each other, and entangled together; at least one speaker for generating said sound waves; and Plate-shaped resonance plate, The three-dimensional network structure comprises: surface, in direct or indirect contact with the human body; and an inner surface, disposed opposite to the surface, The speaker comprises: A vibration part is disposed face to face with the inner surface of the three-dimensional network structure; and a frame portion for holding the vibration portion in a vibration-capable manner, The frame portion is mounted on one side of the resonance plate through an elastic mounting material. The three-dimensional network structure is provided with a surface side component, an intermediate component and an inner side component in order from the surface toward a back side facing the surface and away from the surface from the inner surface. The surface side member is harder than the middle member, The inner member is harder than the surface member.

2. The audio device according to claim 1, wherein: The three-dimensional mesh structure includes an inner side surface, and the inner side surface surrounds the speaker between the inner surface and the back surface. The speaker is accommodated in an internal space surrounded by the inner surface of the three-dimensional network structure, the inner side surface, and one side surface of the resonance plate.

3. The audio device according to claim 2, wherein: The inner surface is located within the intermediate component.

4. The audio device according to claim 3, wherein: The intermediate member and the inner member have substantially the same thickness.

5. The audio device according to claim 4, wherein: The surface member is thinner than the intermediate member and the inner member.

6. The audio device according to claim 5, wherein: The surface side member is composed of a hollow linear body, The intermediate component is composed of a non-hollow linear body, The inner member is composed of a non-hollow linear body, and the outer diameter of the linear body is smaller than the outer diameter of the surface side member.

7. The audio device according to claim 6, wherein: The distance between the speaker and the inner surface is 1 / 10 to 1 / 5 of the thickness of the intermediate component.

8. The audio device according to claim 7, wherein: The rear surface of the three-dimensional network structure is attached to one side surface of the resonance plate through the attachment material.

9. The audio device according to claim 8, wherein: The installation material is a thermoplastic elastomer or glue containing ethylene vinyl acetate copolymer.

10. The audio device according to claim 9, wherein: The frame portion includes a circular flat bottom surface, A concave portion is formed in the center of the bottom surface. The frame portion is attached to one side surface of the wooden board by the attachment material placed in the recessed portion and the attachment material placed in at least a portion of the outer edge portion of the bottom surface.

11. The sound device according to claim 10, wherein: The audio device has a plurality of the speakers. The resonance plate comprises: A plurality of the wooden boards corresponding one-to-one to the plurality of the speakers; and A board member having a plurality of said wooden boards installed thereon, The frame portion of each speaker is mounted on a side surface of the corresponding wooden board through the mounting material. The other side surface of the wooden board, which faces the one side surface mounted on the frame portion, is mounted on the one side surface of the plate member through the mounting material.

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