Audio equipment

Abstract

To provide an acoustic device which enables easy adjustment of a distance between each speaker and an ear of a seated person with a simple structure, and to provide a headrest acoustic unit and a chair.SOLUTION: An acoustic device includes: a base part 31 which is disposed rearward of a headrest 21 of a chair 1 and is supported by the chair 1; arm parts 32 each of which has an extension part 322 extending forward farther than the headrest 21 and is supported by the base part 31 so as to be movable at least in a width direction relative to the headrest 21; and speakers 34 each of which is supported by the extension part 322 and is disposed forward of the headrest 21.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an acoustic device. Place It is related to. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a configuration is known in which a speaker is provided in a headrest that is disposed above the back of a chair and covers the side areas of the ears of a seated person.

[0003] For example, Patent Documents 1 and 2 disclose a headrest with speakers that adjusts the distance between a pair of speakers provided at both left and right ends of the headrest relative to the head of a seated person by rotating the speakers using a hinge mechanism. Patent Document 3 also discloses an audio device that has a rotating mechanism provided inside the headrest that rotates a pair of speakers provided at both left and right ends of the headrest. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 2-2052 [Patent Document 2] Japanese Patent Application Publication No. 6-209830 [Patent Document 3] Japanese Patent Application Publication No. 63-270260 Summary of the Invention [Problem to be solved by the invention]

[0005] In headrests with speakers such as those disclosed in Patent Documents 1 and 2, the speaker must be moved significantly outward from the headrest when leaving or getting off the seat to ensure sufficient head movement. As a result, the operating angle of the speaker when adjusting the distance between the speaker and the occupant's head (ear) becomes large, making it difficult for the occupant to adjust the distance between the speaker and the occupant's ear by operating the speaker. In addition to the above, the speaker moves significantly due to the hinge mechanism, which changes the direction of the sound output from the speaker when adjusting the distance between the occupant's ear and the speaker. As a result, it becomes difficult to ensure a good listening environment in which the occupant can easily hear the sound output from the speaker.

[0006] Furthermore, in the acoustic device described in Patent Document 3, the rotation mechanism for rotating the speaker is provided inside the headrest, which makes the internal structure of the headrest complex.

[0007] The present invention has been made in view of the above circumstances, and provides an acoustic device with a simple configuration that allows easy adjustment of the distance between the speaker and the ears of a seated person. Place The purpose is to provide the following. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the acoustic device of the present invention comprises a base portion positioned behind the headrest of a chair and supported by the chair, an arm portion having an extension portion extending forward of the headrest and supported by the base portion so as to be movable at least in the width direction relative to the headrest, and a speaker supported by the extension portion and positioned in front of the headrest.

[0009] With the above configuration, the acoustic device has an arm portion between the speaker and the base portion, which allows the distance between the speaker and the base portion to be increased, thereby moving the speaker via movement of the arm portion and reducing the amount of speaker operation required when adjusting the distance between the speaker and the ears of the seated person. For example, in an audio device, when the arm is rotated and moved in the width direction, the arm swings widthwise relative to the base, causing the speaker to move in the direction of rotation of the arm. In other words, the speaker moves in a direction in which the front end is wider than the end connected to the arm. As a result, the angle of rotation of the arm in the width direction can be reduced, making it easy to adjust the distance between the speaker and the ears of the seated person. This reduces the amount of speaker operation, ensuring a good listening environment in which the seated person can easily hear the sound output from the speaker with minimal operation. The acoustic device has a short speaker operation distance, which reduces the change in speaker orientation when the speaker is moved. The seated person can move the speaker in a comfortable position without moving their arms significantly, reducing the burden on the seated person of adjusting the distance between the speaker and their ears. Furthermore, the acoustic device has a base and an arm portion (excluding the extension portion) positioned behind the headrest, which improves the aesthetic appearance of the front side of the headrest.

[0010] The acoustic device according to one aspect of the present invention may include an optional member attached to the chair, and the optional member may be supported by the chair via the base portion. According to this configuration, the acoustic device can be further provided with optional components as components separate from the above components. For example, by providing a view-blocking member that blocks the view of the seated occupant, an immersive listening environment can be ensured.

[0011] An audio device according to one aspect of the present invention includes an audio processing unit that adjusts the sound output from the speaker, and a battery that drives the audio processing unit, and the audio processing unit and the battery may be provided behind the optional component. According to this configuration, the battery of the audio device is provided behind the optional component, which makes it easy to replace the battery. Also, by providing the sound processing unit and the battery behind the optional component, the configuration between the headrest and the optional component can be simplified.

[0012] In the acoustic device according to one aspect of the present invention, the arm portion may be movable in the up and down direction of the headrest relative to the base portion. With this configuration, the acoustic device can easily adjust the distance between the speaker and the ear of the seated person by moving the arm portion up and down to accommodate differences in the height of the seated person's ears.

[0013] A headrest acoustic unit according to one aspect of the present invention includes the above acoustic device and a headrest disposed in front of the base portion. With this configuration, the headrest acoustic unit can be provided with the acoustic device and the headrest as separate entities, simplifying the configuration of each. Also, because the acoustic device and the headrest are separate entities, the acoustic device can be easily added later or removed when the speaker or other components are no longer needed.

[0014] A chair according to one aspect of the present invention comprises the above-described headrest acoustic unit and a backrest that supports a seated person from behind, and the arm portion is provided on the front side of the backrest in the fore-and-aft direction. With this configuration, the occupant of the chair can easily adjust the distance between the speaker and the occupant's ear by moving the speaker in the width direction. Also, because the amount of speaker operation can be reduced, the burden on the occupant of the chair when adjusting the distance between the speaker and the occupant's ear can be reduced. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide an acoustic device, a headrest acoustic unit, and a chair that have a simple configuration and allow the distance between the speaker and the ears of a seated person to be easily adjusted. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a front view of a chair according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] 1 is an exploded perspective view of a headrest acoustic unit according to an embodiment of the present invention; [Figure 6] FIG. 2 is a vertical cross-sectional view of the headrest acoustic unit. [Figure 7] FIG. 2 is a cross-sectional view of the headrest acoustic unit. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an acoustic device, a headrest acoustic unit, and a chair according to an embodiment of the present invention will be described with reference to the drawings.

[0018] The chair 1 according to this embodiment shown in Figures 1 to 4 can be used, for example, for web conferences in a work environment such as an office or home, or for listening to music, watching movies, etc.

[0019] In the following description, the front of the seated person M seated in a normal posture on the chair 1 will be referred to as the "front," and the opposite side of the front will be referred to as the "rear." Furthermore, the upper side of the seated person M seated in a normal posture on the chair 1 will be referred to as the "top," the lower side will be referred to as the "bottom," the left side of the seated person M seated in a normal posture on the chair will be referred to as the "left," and the right side will be referred to as the "right." Furthermore, in the following description and drawings, the left-right direction will be referred to as the X direction, the up-down direction will be referred to as the Y direction, and the front-to-back direction will be referred to as the Z direction.

[0020] As shown in Figures 1 to 4, the chair 1 according to this embodiment comprises legs 10, a support base 11, a seat 12, a backrest 13, and a headrest acoustic unit 2. The legs 10 are placed on the floor. The support base 11 is installed at the upper end of the legs 10. The seat 12 is attached to the upper surface of the support base 11 and supports the buttocks of a seated person M. The backrest 13 is attached to the rear of the support base 11 and supports the back of the seated person M.

[0021] The headrest acoustic unit 2 includes a headrest 21 and an acoustic device 3. The headrest 21 is attached to the upper part of the backrest 13 and supports the head h of the seated person M from behind. The headrest acoustic unit 2 is attached to the upper part of the backrest 13 via the headrest 21.

[0022] The legs 10, the base 11, and the seat 12 form a support structure 14 that supports the weight of the backrest 13, headrest 21, headrest acoustic unit 2, and seated person M, which are located above the seat 12 of the chair 1.

[0023] The leg 10 comprises a multi-leg 101 with a plurality of casters that are movably placed in contact with the floor surface, and a pillar 102 that stands up from the center of the multi-leg 101 and has a built-in gas spring that serves as a lifting mechanism, and a support base 11 is attached to the upper end of the pillar 102. A lifting adjustment mechanism for the pillar 102 and a tilt adjustment mechanism for the backrest 13 are built into the support base 11. Chair 1 is not limited to the above configuration as long as it can stably support the weight of seated person M. For example, multi-leg 101 may be omitted and leg post 102 may be fixed to the ground, or leg 10 and support base 11 may be omitted and seat 12 may be fixed to the ground.

[0024] 3, a component mounting portion 132 for mounting the headrest 21 is provided on the rear surface of the center in the X direction of the upper side portion 131 of the backrest 13. Although not shown in detail, the component mounting portion 132 is provided with a seat surface against which the mounting base of the additional functional component abuts, and a bolt fastening portion for fastening and fixing the mounting base. In this embodiment, the headrest 21 is mounted to the component mounting portion 132.

[0025] As shown in FIGS. 2 and 3, the headrest 21 includes a load support plate 211, a cushion material 212, and a cover material 213. The load support plate 211 is supported on the upper end of the backrest 13, is made of hard resin, and functions as a strength member. The cushion material 212 is disposed on the front side of the load support plate 211. The cover material 213 covers the outside of the load support plate 211 and the cushion material 212. A mounting base 211a extending downward is provided at the lower end of the load support plate 211. The mounting base 211a is placed on the rear side of the component mounting portion 132 of the backrest 13, and is fastened to the component mounting portion 132 with bolts. The front surface of the cushion material 212 is curved so that approximately the center in the Y direction bulges forward to the greatest extent.

[0026] The headrest 21 is not limited to the above configuration as long as the base 31 and the pair of movable connecting parts 33, 33 of the acoustic device 3, which will be described later, can be arranged behind the headrest 21. For example, the headrest 21 may have a plate-like outer shape parallel to the X direction, or both ends in the X direction may be formed into a shape that fits along the back of the head and back of the neck of the seated occupant M.

[0027] 5 to 7, the acoustic device 3 includes an optional member 4 (hereinafter referred to as "shielding member 4"), a base 31, a pair of arms 32, 32, a pair of movable connecting portions 33, 33, and a pair of speakers 34, 34. The acoustic device 3 is connected to the shielding member 4 and the headrest 21 via the base 31. The acoustic device 3 outputs sound toward the ears M1 of the seated occupant M. The shielding member 4 is arranged so as to cover the rear and both left and right sides of the head h of the seated occupant M.

[0028] As shown in FIGS. 1 and 4, the shielding member 4 has a generally U-shaped shape in top view and is attached to the upper part of the backrest 13. The shielding member 4 includes a rear shielding wall 41 (connecting portion) and a pair of shielding side walls 42, 42 (head side shielding portions). The rear shielding wall 41 is disposed at the upper part of the backrest 13 and behind the headrest 21 and connects the pair of shielding side walls 42, 42. The pair of shielding side walls 42, 42 curve and extend forward from both the left and right sides of the rear shielding wall 41. The shielding member 4 is integrally formed over substantially the entire area from a nonwoven fabric having sound-absorbing properties. The resin material for forming the shielding member 4 can be, for example, polyester containing resin fibers as the main raw material. The outer shapes of the pair of shielding side walls 42, 42 are generally the same. By using a sound-absorbing material for the shielding member 4, it is possible to prevent the sound emitted from the speaker 34 from reverberating inside the shielding member 4.

[0029] 1, 2, and 4, the rear shielding wall 41 covers the rear of the head h of the seated person M seated in a normal posture on the chair 1. The pair of side shielding walls 42, 42 cover the left and right sides of the head h of the seated person M seated in a normal posture on the chair 1.

[0030] The shielding member 4 can stably shield the seated person M seated on the chair 1 from unnecessary external views, regardless of the position to which the chair 1 is moved.

[0031] The base portion 31 is formed from a single plate-like member and is disposed behind the headrest 21 and in front of the rear shielding wall 41. The base portion 31 has a flat portion 311 and a pair of extension portions 312, 312 extending from the left and right ends of the flat portion 311 toward the rear surface of the headrest 21. The base portion 31 may be formed integrally with the bracket 22.

[0032] The headrest acoustic unit 2 further includes a pair of brackets 22, 22 that are disposed between the headrest 21 and the base portion 31 and that connect and integrate the headrest 21, the acoustic device 3, and the shielding member 4. The pair of brackets 22, 22 are disposed apart in the X direction, and their upper ends are connected. The distance between the pair of brackets 22, 22 in the X direction is shorter than the length of the flat portion 311 in the X direction. The outer shapes of the pair of brackets 22, 22 are approximately the same.

[0033] The bracket 22 has a pair of first extending portions 221, 221. The pair of first extending portions 221, 221 extend from the front end portion in the Z direction toward the other bracket 22. The pair of first extending portions 221, 221 have bolt holes formed therein. The headrest 21 has bolt holes formed at positions corresponding to the bolt holes of each first extending portion 221, and nuts are inserted into the bolts. The headrest 21 and the pair of brackets 22, 22 are connected by bolts inserted into the bolt holes of each first extending portion 221.

[0034] A first connection portion 23 that connects the headrest 21 and the pair of brackets 22, 22 is formed by a pair of brackets 22, 22, bolts that are inserted into each bolt hole of a pair of first extension portions 221, 221 of each bracket 22 and fitted into the headrest 21, and a nut inserted into the headrest 21.

[0035] The bracket 22 further has a pair of second extending portions 222, 222. The pair of second extending portions 222, 222 extend from the rear end in the Z direction toward the other bracket 22. The pair of second extending portions 222, 222 have bolt holes formed therein. The base portion 31 has bolt holes formed at positions corresponding to the bolt holes of each second extending portion 222, and nuts are welded to the surfaces of the bolt holes of the second extending portions 222 facing the headrest 21. A fixing plate 41a is provided within the shielding rear wall 41 at a position corresponding to the base portion 31. The fixing plate 41a has bolt holes formed at positions corresponding to the bolt holes of each second extending portion 222 and the base portion 31. The pair of brackets 22, 22, the base portion 31, and the shielding member 4 are fastened together by bolts inserted through the bolt holes of each second extending portion 222, the base portion 31, and the fixing plate 41a, thereby connecting the pair of brackets 22, 22, the base portion 31, and the shielding member 4. The nuts on the fixing plate 41a side can be securely fastened to the bolts without being affected by the substantially U-shaped top view of the rear shielding wall 41 due to the plate-like fixing plate 41a.

[0036] A second connection portion 24 connecting the pair of brackets 22, 22, the base portion 31 and the shielding member 4 is formed by a pair of brackets 22, 22, a pair of bolts inserted into each bolt hole formed in the pair of second extension portions 222, 222 of each bracket 22, the base portion 31 and the fixing plate 41a, and a nut welded to the second extension portion 222.

[0037] The acoustic device 3 is stably supported on the headrest 21 by the first connecting portion 23 , and the shielding member 4 is stably supported on the acoustic device 3 at the base portion 31 by the second connecting portion 24 . The fixing plate 41a may be formed on the outside of the rear shielding wall 41, or may be formed inside the battery holder 25 (described later) and may be further fastened together with the battery holder 25 by a bolt. Furthermore, at the first connection portion 23 and the second connection portion 24, the headrest 21, the acoustic device 3, and the shielding member 4 are connected via a pair of brackets 22, 22 by bolting, but the bracket 22 may also be configured to be hooked onto the headrest 21, the acoustic device 3, and the shielding member 4 by a mechanism such as a hook.

[0038] The pair of arm portions 32, 32 are located inside the shielding member 4 and on the front side of the backrest 13 in the Z direction. The pair of arm portions 32, 32 have a configuration that is approximately the same. The arm portion 32 has a first arm portion 321 and a second arm portion 322 (extension portion). The first arm portion 321 is located behind the headrest 21, and one end is connected to the extension portion 312 of the adjacent base portion 31 and extends toward one end of the headrest 21 in the X direction. The second arm portion 322 extends from the other end of the first arm portion 321, wraps around one end of the headrest 21 in the X direction, and extends to the front side of the headrest 21. The arm portion 32 is not limited to being located inside the shielding member 4 and on the front side of the backrest 13 in the Z direction. For example, the arm portion 32 may extend from the rear side to the front side of the backrest 13 inside the shielding member 4.

[0039] The first arm portion 321 has a first end 321a connected to the movable connecting portion 33 and a second end 321b continuous with the second arm portion 322. The second arm portion 322 includes a bent portion 322a and a speaker fixing arm 322b. The bent portion 322a extends from the second end 321b to the front in the Z direction and is bent to surround the end of the headrest 21 in the X direction. The speaker fixing arm 322b extends from the bent portion 322a in the X direction. The speaker 34 is connected to an extending end 322c of the speaker fixing arm 322b. When the arm portion 32 is closest to the end of the headrest 21 in the X direction, the extending end 322c of the speaker fixing arm 322b is located on the front side of the headrest 21 in the Z direction. The front side in the Z direction means a position in the Z direction relative to the headrest 21 that is forward, and includes a state in which the headrest 21 is located in front of the headrest 21 as shown by the solid line in FIG. 4, and a state in which the headrest 21 is located further outward in the X direction than the end of the headrest 21 as shown by the dashed line in FIG. 4, and is located in front of the headrest 21 in the Z direction. In the illustrated example, the bending portion 322a has two planar sides bent at approximately right angles, but is not limited to this as long as the bending portion 322a is bent so as to surround the end of the headrest 21. For example, the bending portion 322a may be curved so as to surround the end of the headrest 21. When the width of the headrest 21 in the X direction is short, the bending portion 322a of the arm portion 32 may be omitted.

[0040] The pair of movable connecting portions 33, 33 have a configuration that is approximately aligned. The movable connecting portion 33 is disposed rearward of the headrest 21 and inward in the X direction from the left and right ends of the headrest 21. The movable connecting portion 33 connects the opposing ends of the extension portion 312 of the base portion 31 and the first arm portion 321 of the arm portion 32. The pair of arm portions 32, 32 are supported by the base portion 31 and are movable (rotatable) in the X direction around rotation axes 331, 331 of the pair of movable connecting portions 33, 33 as approximately vertical rotation axes. The pair of arm portions 32, 32 rotate in the X direction around the rotation axes 331, 331, thereby moving toward and away from each other inside the shielding member 4. The movable connecting portion 33 may be, for example, a torque hinge in which the arm portion 32 swings when a predetermined torque is applied, or may be configured to swing the arm portion 32 in multiple stages using a latch.

[0041] The pair of speakers 34, 34 have a substantially identical configuration. The speaker 34 is connected to a speaker fixing arm 322b of the second arm portion 322 of the arm portion 32 and is supported by the arm portion 32. The speaker 34 is disposed inside the shielding member 4 and in front of the headrest 21. The speaker 34 is provided so as to be able to swing in the X direction via the rotational movement of the arm portion 32. When a seated person M is sitting in the chair 1, and when the seated person M listens to sound, the pair of speakers 34, 34 are swung in the X direction to adjust the distance between the pair of speakers 34, 34 and the ears M1 of the seated person M.

[0042] The pair of arm portions 32, 32 may be able to move at least in the X direction via the pair of movable connecting portions 33, 33, and may, for example, move further in the Y direction in conjunction with the X direction, or may rotate around the pair of movable connecting portions 33, 33 as a rotation axis. When the arm portion 32 rotates, the movable connecting portion 33 may be a universal joint or a ball joint. Furthermore, when the arm portion 32 moves further in the Y direction or when the arm portion 32 rotates, the speaker 34 can be moved via the arm portion 32, making it possible to easily adjust the distance between the speaker 34 and the ear M1 of the seated occupant M to accommodate differences in the height of the ear M1 due to differences in the sitting height of the seated occupant M, etc.

[0043] In this embodiment, the speaker 34 includes a sound generating unit 34a and a case 34b. The sound generating unit 34a is housed in the case 34b. The speaker 34 is a directional speaker, and can have a directivity angle (sound range) of ±10 degrees and a sound pressure range of within -6 dB compared to the sound pressure directly in front. The sound generating unit 34a of the speaker 34 is arranged facing the other speaker 34 on the opposite side.

[0044] The front end 42 a of the shielding side wall 42 protrudes forward beyond the front end 34 c of the speaker 34 .

[0045] The acoustic device 3 further includes a microphone unit. The microphone unit includes a sound collection unit and a transmitter, and is built into the front end 34c of at least one of the pair of speakers 34, 34. The microphone unit is provided so that at least the sound collection unit is positioned near the mouth of the seated person M when the pair of speakers 34, 34 are swung to adjust the distance between the pair of speakers 34, 34 and the ears M1 of the seated person M. By including the microphone unit, the chair 1 can conduct voice calls and web meetings. The microphone unit is not an essential component of the acoustic device 3.

[0046] 2 to 4, the audio device 3 further includes an audio processing unit 35 and a battery 36. The audio processing unit 35 is electrically connected to the pair of speakers 34, 34 and adjusts the sound output from the pair of speakers 34, 34. The battery 36 has a connection portion on its bottom surface and drives the audio processing unit 35. The audio processing unit 35 is a known amplifier (hereinafter referred to as "amplifier 35").

[0047] A battery holder 25 is formed on the rear side of the shielding rear wall 41, protruding outward in the Z direction, open at least at the top, and having a connection part 25a for the battery 36 provided on the bottom surface. An amplifier 35 is built into the battery holder 25. The battery holder 25 may be installed by bolting to the shielding rear wall 41, or may be formed integrally with the shielding member 4.

[0048] The audio device 3 outputs sound from a pair of speakers 34, 34 by inserting a battery 36 into the battery holder 25, electrically connecting the battery 36 and the battery holder 25, and supplying power from the battery 36 to an amplifier 35 built into the battery holder 25. A through-hole (not shown) is formed in the shielding member 4. The amplifier 35 built into the battery holder 25 and the pair of speakers 34, 34 are connected by electrical wiring (not shown) that extends from the amplifier 35 and is inserted into the through-hole.

[0049] When the shielding member 4 is omitted, the battery holder 25 may be installed behind the headrest 21 or behind the backrest 13. Furthermore, when the headrest acoustic unit 2 does not include the optional component 4, the battery holder 25 may be fastened together with the base portion 31 by the second connecting portion 24 and disposed behind the base portion 31.

[0050] Next, the operations of the above-mentioned acoustic device 3, headrest acoustic unit 2, and chair 1 will be described in detail with reference to the drawings.

[0051] As shown in Figures 1 and 3, in the acoustic device 3, a pair of movable connecting parts 33, 33 located on the rear side of the headrest 21 are used as approximately vertical rotation axes, and a pair of arm parts 32, 32 are connected so as to be movable in the X direction, causing a pair of speakers 34, 34 to swing in the X direction. With the above configuration, when the seated person M adjusts the distance between the ears M1 of the seated person M and the pair of speakers 34, 34 in the chair 1, the pair of arms 32, 32 swing around the rotation axes 331, 331, and the pair of speakers 34, 34 move in the rotational direction. That is, the pair of speakers 34, 34 move in a direction in which the front ends 34c, 34c are wider than the ends connected to the speaker fixing arms 322b, 322b. As a result, the rotation angle of the pair of arms 32, 32 in the X direction can be reduced, and the distance between the pair of speakers 34, 34 and the ears M1 of the seated person M can be adjusted. Therefore, the amount of operation of the pair of speakers 34, 34 can be reduced, ensuring a good listening environment in which the seated person M can easily hear the sound output from the pair of speakers 34, 34 with a small amount of operation. In addition, since the operation amount of the pair of speakers 34, 34 is short, the seated person M can swing the pair of speakers 34, 34 in a comfortable position without twisting his / her hands greatly, thereby reducing the burden on the seated person M of adjusting the distance between the pair of speakers 34, 34 and the ears M1 of the seated person M. Furthermore, the pair of arm portions 32, 32 increases the rotation radius of the pair of speakers 34, 34 in the X direction and reduces the amount of operation in the X direction, thereby suppressing changes in the orientation of the sound generating units 34a, 34a when the pair of speakers 34, 34 are swung. Furthermore, because the first arm portions 321, 321 can reduce the rotation angle of the pair of arm portions 32, 32, it is possible to ensure the amount of movement required for the pair of speakers 34, 34 even when the range of movement of the pair of arm portions 32, 32 behind the headrest 21 is limited. Furthermore, because it is not necessary to secure a large space for arranging the pair of arm portions 32, 32 behind the headrest 21, space saving and compactness can be achieved.

[0052] 5 to 7, the shielding member 4 is stably supported on the acoustic device 3 at the base portion 31 by the second connecting portion 24. With the above configuration, the shielding member 4, which is separate from the acoustic device 3, can be provided on the rear side of the acoustic device 3. Furthermore, the shielding member 4 blocks the view to the sides and rear of the seated occupant M, ensuring an immersive listening environment.

[0053] As shown in Figures 2 and 4, in the audio device 3, a battery 36 is inserted into the battery holder 25 to electrically connect them, and power from the battery 36 is supplied to an amplifier 35 built into the battery holder 25, thereby outputting sound at a desired volume from a pair of speakers 34, 34. In addition, in the headrest acoustic unit 2, the battery holder 25 is positioned behind the shielding member 4, so the opening position of the battery holder 25 is located on the outer surface side of the shielding member 4, making it easy to replace the battery 36 and simplifying the configuration between the headrest 21 and the shielding member 4. Furthermore, in the chair 1, the battery holder 25 opens upward and the battery 36 is inserted into the battery holder 25 from above, so that the battery 36 will not fall out of the battery holder 25 even when the backrest 13 is reclined.

[0054] 5 to 7, in the headrest acoustic unit 2, the acoustic device 3 and the headrest 21 are separate bodies, and the acoustic device 3 and the shielding member 4 are also separate bodies, which simplifies the configuration of the acoustic device 3, the headrest 21, and the shielding member 4. Furthermore, the acoustic device 3 can be easily attached later, or the pair of speakers 34, 34 can be easily removed when they are no longer needed.

[0055] In the headrest acoustic unit 2, a pair of movable connecting parts 33, 33 are disposed behind the headrest 21 and inward in the X direction from the left and right ends of the headrest 21. In addition, first arm parts 321, 321 of a pair of arm parts 32, 32 extend from the pair of movable connecting parts 33, 33 toward both ends of the headrest 21 in the X direction. With the above configuration, the pair of movable connecting parts 33, 33 and the first arm parts 321, 321 are hidden by the headrest 21 and cannot be seen when the chair 1 is viewed from the front, thereby improving the aesthetic appearance of the front side of the headrest 21. In addition, the hair of the seated person M can be prevented from getting caught in the pair of movable connecting parts 33, 33.

[0056] 6 and 7, in the headrest acoustic unit 2, the first connecting portion 23 and the second connecting portion 24 that connect the headrest 21, the acoustic device 3, and the shielding member 4 are disposed on the rear side of the headrest 21. With the above configuration, the first connecting portion 23 and the second connecting portion 24 are not visible when the chair 1 is viewed from the front, thereby further improving the aesthetic appearance of the headrest acoustic unit 2. In other words, the first connecting portion 23 and the second connecting portion 24 are not visible from the left, right, and rear due to the shielding member 4, thereby improving the aesthetic appearance of the headrest acoustic unit 2. Furthermore, if the cross section of the headrest 21 has a convex shape toward the front, as in this embodiment, the headrest acoustic unit 2 can accommodate the first connection portion 23 and the second connection portion 24 inside it, making it difficult to see the first connection portion 23 and the second connection portion 24 even when viewed from above.

[0057] 2 and 4, in the headrest acoustic unit 2, the front end portions 42a, 42a of the pair of shielding side walls 42, 42 protrude further forward than the front end portions 34c, 34c of the pair of speakers 34, 34. With the above configuration, the headrest acoustic unit 2 can reduce sound leakage to the outside of the sound output from the pair of speakers 34, 34.

[0058] Furthermore, in the chair 1, when the seated person M leaves or sits on the chair 1, the pair of speakers 34, 34 can be moved in the X direction (opening direction) via the pair of arms 32, 32, thereby increasing the distance between the pair of speakers 34, 34 and the ears M1 of the seated person M and moving the pair of speakers diagonally rearward of the ears M1 of the seated person M. This prevents the hair of the seated person M from getting caught in the pair of speakers 34, 34, and does not interfere with the movement of the seated person M when leaving or sitting. Furthermore, in the chair 1, the pair of speakers 34, 34 can be moved in the X direction (opening direction) via the pair of arms 32, 32, thereby moving the sound output direction of the pair of speakers 34, 34 forward. This ensures a good listening environment even when the seated person M leans forward.

[0059] The above describes embodiments of the acoustic device, headrest acoustic unit, and chair according to the present invention, but the present invention is not limited to the above embodiments and can be modified as appropriate within the scope of the spirit thereof.

[0060] For example, in the chair 1 according to the above embodiment, the shielding member 4 is attached to the main body of the backrest 13 via the headrest 21, but the shielding member 4 may also be fixed directly to the main body of the backrest 13. Alternatively, the backrest 13 and the seat 12 may be integrally formed to form a substantially L-shape in side view, and the shielding member 4 may be attached to the top of the integrally formed structure.

[0061] In addition, in this embodiment, the battery holder 25 is configured to be provided behind the rear shielding wall 41 of the shielding member 4, but the installation position is not limited to the above as long as the desired sound can be output from the pair of speakers 34, 34. For example, it may be disposed behind the shielding side wall 42 or in front of the shielding member 4.

[0062] In addition, in this embodiment, the shielding member 4 is used as the optional member 4, but the optional member 4 may be, for example, a sound device or a monitor that is separate from the pair of speakers 34, 34 and placed above or in front of the head h of the seated person M, or may be a lighting device installed depending on the work of the seated person M, such as web conferencing or reading. Also, the optional member 4 may be a hanger connected to the backrest 13, or an armrest on which the seated person M places his or her elbows.

[0063] In this embodiment, an example is shown in which the base portion 31 is fixed to the shielding member 4, but the base portion 31 may be configured to be supported by the chair 1, and for example, the base portion 31 may be fixed to the backrest 13, or the base portion 31 may be fixed to the headrest 21. [Explanation of symbols]

[0064] 1 chair 2 Headrest sound unit 3 Sound equipment 4 Shielding material (optional material) 13 Backrest 21 Headrest 31 Base 32 Arm section 34 Speaker 35 Acoustic processing unit (amplifier) 36 Battery 322 Second arm part (extension part) M seated person

Claims

1. a base portion disposed behind a headrest of a chair and supported by the chair; an arm portion having an extension portion extending forward of the headrest and supported by the base portion so as to be movable at least in a width direction relative to the headrest; a speaker supported by the extension and disposed in front of the headrest; an acoustic processing unit that adjusts the sound output from the speaker; a battery for driving the sound processing unit; a battery holder that is installed behind the headrest or the back of the chair with an upward opening and into which the battery is inserted from above; Equipped with sound equipment.

2. a base portion disposed behind a headrest of a chair and supported by the chair; an arm portion having an extension portion extending forward of the headrest and supported by the base portion so as to be movable at least in a width direction relative to the headrest; a speaker supported by the extension and disposed in front of the headrest; Equipped with The arm portion is movable in the up and down direction of the headrest relative to the base portion. sound equipment.

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