WO2009113319A1 - Chair with built-in speaker - Google Patents

Abstract

The direction from which sounds reproduced by center speakers are heard and the direction from a position where a video is displayed are matched. A chair is disposed opposite to a video display device (1), and the chair has built-in speakers (2 to 5) of a multi-channel speaker system including center speakers (2) which reproduce sounds from the front. The center speakers (2) allow a first reflector (6) installed in front to reflect the sounds, thereby creating a virtual sound source (28) in front.

Description

Speaker built-in chair

The present invention relates to a speaker built-in chair. More specifically, the present invention relates to a speaker built-in chair that incorporates each speaker constituting a multi-channel speaker system and reproduces sound in accordance with an image displayed on a display surface of a front image display device.

For example, JP-A-10-285678 and JP-A-5-137630 propose various chairs incorporating a speaker. By incorporating a speaker into the chair, the trouble of placing the speaker separately in one corner of the room can be eliminated, and the inconvenience that the positional relationship with the speaker changes depending on the listening location can be eliminated. You can always enjoy the sound in good condition.
Japanese Patent Laid-Open No. 10-285678 JP-A-5-137630

However, when a speaker is incorporated in a chair, a person who sits in the chair and listens to the sound will make a sound near the body. For example, in the 5.1 channel surround system, the center speaker reproduces the sound from the front, such as the dialogue of the characters in the video, but the dialogue of the video characters is close to your body by incorporating the center speaker into the chair. Will cause the viewer to feel uncomfortable.

An object of the present invention is to provide a speaker built-in chair that does not cause a viewer to feel uncomfortable even if a center speaker that reproduces sound from the front is incorporated.

In order to achieve such an object, the invention described in claim 1 is a chair in which each speaker of a multi-channel speaker system including a center speaker that reproduces sound from the front is arranged facing a video display device. The center speaker reflects a sound to the first reflector installed in the front to create a virtual sound source in the front.

Therefore, the center speaker emits sound toward the front. The sound emitted from the center speaker is reflected by the first reflector and returns toward the viewer sitting on the chair. The viewer has the illusion that there is a sound source in front of the reflected sound. That is, a virtual sound source of the sound reproduced by the center speaker is created in the front.

In the speaker built-in chair according to claim 2, sound is reflected by using the first reflector as a display surface of the video display device.

Further, the speaker built-in chair according to claim 3 includes a direction adjusting device that makes the direction of the center speaker variable and an optical sighting device that irradiates an aiming beam in a direction in which the center speaker emits sound.

Furthermore, the speaker built-in chair according to claim 4 is configured to incorporate at least one of the speakers other than the center speaker in a direction different from the direction toward the seated person, and to output the sound emitted from the speaker to the seated person. A second reflector that reflects toward the surface is provided.

For example, a 5.1 channel surround speaker will be described as an example. The sound output from the surround speaker is reflected by the second reflector and returns toward the seated viewer. The viewer who has listened to the reflected sound has the illusion that the sound source is far away from the position where the surround speaker is actually installed. That is, a virtual sound source of sound reproduced by a surround speaker is created at a distance.

Further, the speaker built-in chair according to claim 5 is such that a center speaker is installed at the center in the width direction facing the front. Therefore, when the first reflector is installed in front of the speaker built-in chair, the sound of the center speaker is emitted toward the first reflector and is reflected by the first reflector and sits on the chair. Come back straight to the viewer.

Further, the speaker built-in chair according to claim 6 has left and right front speakers installed on both left and right sides facing the front. Therefore, in addition to the sound of the center speaker, the sounds of the left and right front speakers are also emitted toward the first reflector, reflected back by the first reflector, and returned straight to the viewer sitting on the chair. come.

Further, the speaker built-in chair according to claim 7 is provided with a diffusion surface in which irregular irregularities are continuously formed on the reflection surface of the second reflector. Therefore, the sound reflected by the second reflector is irregularly reflected by the diffusing surface, and the reflected sound can be prevented from concentrating on a specific place.

In addition, the speaker built-in chair according to claim 8 includes a subwoofer, and includes an opening that opens to the seated person and communicates with the space behind the diaphragm of the subwoofer. Therefore, when the air in the space behind the diaphragm is vibrated by the vibration of the diaphragm of the subwoofer, an air flow through the opening is formed, and a wind is generated from the opening toward the seated person.

In the speaker built-in chair according to claim 9, all the speakers of the speaker system are provided on the legs. Here, like the speaker built-in chair according to claim 10, the leg portion may be a speaker box provided separately from the chair body. When the leg portion is a speaker box, a single speaker box may be used, or the speaker box may be a pair of left and right speaker boxes as in the speaker built-in chair according to claim 11.

In the speaker built-in chair according to claim 1, a virtual sound source of sound reproduced by the center speaker can be created in the front, so that, for example, a speech spoken by a video character can be heard from the direction of the video display device. Therefore, it is possible to prevent a sense of discomfort caused by the sound of the center speaker being heard from a different direction from the video. In addition, since the uncomfortable feeling can be prevented, the center speaker can be incorporated into the chair, and a so-called all-in-one chair can be provided for the speaker of the multi-channel speaker system. That is, it is possible to achieve both the incorporation of the multi-channel speaker system into the chairs of all speakers and the natural way of hearing the sound reproduced by the center speaker. In particular, the multi-channel speaker system has a large number of speakers, so wiring and construction becomes troublesome if speakers are provided separately, but the trouble of wiring and construction can be eliminated by using the all-in-one method, as well as moving and layout. It is possible to easily move the place due to a change or the like, and further improve usability. And by incorporating all the speakers into the chair, it is possible to create a sound field that wraps around the chair, and you can enjoy powerful sound personally without making a loud sound that resonates throughout the room. That is, a realistic sensation can be easily obtained with a small volume. On the other hand, it is possible to prevent other people inside and outside the room from being disturbed by noise. Furthermore, since there is no need to place wiring or separate speakers in the room, the room can be made clean.

In the chair with a built-in speaker according to claim 2, since the sound reproduced by the center speaker can be reflected using the display surface of the video display device, a virtual sound source is created in the direction of the display surface of the video display device. And the direction in which the sound from the center speaker of the image is heard can be matched. Further, it is economical because it is not necessary to prepare a dedicated reflector separately.

Further, in the speaker built-in chair according to claim 3, since the direction of the center speaker can be adjusted while visually confirming the direction of the center speaker, it is easy to align the center speaker.

When a speaker is incorporated in a chair, the speaker is incorporated in a position close to the seated person. In the chair with a built-in speaker according to claim 4, a virtual sound source can be created at a position away from the viewer by reflecting the sound emitted from the speaker to the second reflector. Therefore, you can enjoy a more realistic sound.

Usually, it is considered that the first reflector is installed in front of the speaker built-in chair. For this reason, in the speaker built-in chair according to claim 5, since the center speaker is installed facing the front in the center in the width direction, the sound of the center speaker is seated on the chair as compared with the case where the center speaker is provided at another position. Can be reflected most toward the viewer. Therefore, the sound of the center speaker can be heard efficiently.

In the speaker built-in chair according to claim 6, in addition to the sound of the center speaker, the sound of the left and right front speakers can also be reflected by the first reflector so that the reflected sound can be heard. Can be made far away.

In the speaker built-in chair according to claim 7, since the reflected sound by the second reflector can be diffused, the place where the reflected sound can be heard well can be expanded.

In the speaker built-in chair according to claim 8, the wind can be directed toward the seated person according to the sound of the subwoofer. Therefore, the seated person can obtain a greater sense of presence.

Further, in the speaker built-in chair according to claim 9, since all the speakers can be collected on the legs, the manufacturing can be facilitated.

Moreover, in the speaker built-in chair according to claim 10, since the speaker box and the chair main body are separately manufactured and combined, the speaker built-in chair can be manufactured, so that the manufacturing can be further facilitated. it can.

Furthermore, the speaker built-in chair according to claim 11 can be adapted to chair bodies having different widths by adjusting the distance between the left and right speaker boxes in accordance with the width of the chair body.

It is a perspective view which shows 1st Embodiment of the speaker built-in chair of this invention. It is sectional drawing of a center speaker. It is a front view of a direction adjustment apparatus. FIG. 4 is a cross-sectional view of the orientation adjusting device taken along line IV-IV in FIG. 3. It is sectional drawing which shows the attachment state of a surround speaker. It is a perspective view which shows an example of embodiment of the speaker built-in chair of this invention. It is a front view which shows 2nd Embodiment of the speaker built-in chair of this invention. It is a top view of the same speaker incorporation chair. It is a top view of the state which removed the seat cushion and backrest cushion of the speaker built-in chair. It is sectional drawing of the speaker built-in chair which follows the XX line of FIG. It is a block diagram of the circuit which processes the signal of each channel of the speaker built-in chair. The 2nd reflector of the same speaker incorporation chair is shown, (A) is a top view, (B) is a front view. It is a perspective view which shows 3rd Embodiment of the speaker built-in chair of this invention. It is a perspective view of the state where the 4th embodiment of the speaker built-in chair of the present invention was shown, and the interval of the left and right speaker boxes was expanded. It is the perspective view of the state which showed the same speaker built-in chair and narrowed the space | interval of the speaker box on either side. It is a graph which shows the experimental result for confirming the effect at the time of providing a diffusion surface in the 2nd reflector, and shows the measurement result at the time of installing a microphone in a central measurement position. It is a graph which shows the experimental result for confirming the effect at the time of providing a diffusion surface in the 2nd reflector, and shows the measurement result at the time of installing a microphone in the left measurement position. It is a top view of the chair for demonstrating the position which installed the microphone in the experiment for confirming the effect at the time of providing a diffusion surface in the 2nd reflector. It is a top view which shows the 2nd reflector used for the experiment for confirming the effect at the time of providing a diffusion surface in a 2nd reflector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Video display apparatus 2 Center speaker 3 Front speaker 4 Surround speaker 5 Subwoofer 6 1st reflector 9 Orientation adjustment device 22 Optical sighting device 24 2nd reflector 28 Virtual sound source

Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

FIG. 1 shows a first embodiment of a speaker built-in chair of the present invention. The speaker built-in chair is arranged facing the video display device 1 and incorporates each speaker of a multi-channel speaker system including a center speaker 2 that reproduces sound from the front. In this embodiment, a 5.1 channel surround system is adopted as the multichannel speaker system. Therefore, the center speaker 2, the left and right front speakers 3, the left and right surround speakers 4, and the subwoofer speaker 5 are incorporated in the chair. However, the multi-channel speaker system that can be adopted is not limited to the 5.1 channel surround system, but may be, for example, a 6.1 channel surround system, and any other system that has a center speaker 2 that reproduces sound from the front. A system with a number of channels may be used.

The chair is, for example, a sofa. The sofa may be a single person or a single person. However, applicable chairs are not limited to sofas, and may be easy chairs or other chairs, for example. The chair is disposed so as to face the image display device 1 such as a display or a screen for displaying an image.

The center speaker 2 creates a virtual sound source 28 in front by reflecting sound to the first reflector 6 installed in front. In the present embodiment, one virtual sound source 28 is made forward using two center speakers 2. The two center speakers 2 are incorporated in front of the left and right armrests 7 of the chair, for example. However, the installation position of the center speaker 2 is not limited to the front surface of the armrest 7, and is not particularly limited as long as it is a position where sound can be emitted toward the front. For example, it may be incorporated into the front surface of the seat portion or the like, or may be incorporated into the front surface of the leg portion as long as the leg portion can incorporate the center speaker 2. Further, the number of center speakers 2 is not limited to two, and may be one, or three or more depending on circumstances. In the case where the center speaker 2 is constituted by one speaker, it can be incorporated in the front surface of either the left or right armrest 7 or the front center of the seat portion 23. Since the center speaker 2 shares one channel in the 5.1 channel, when a plurality of center speakers 2 are provided, the center speaker 2 outputs the same sound.

A unidirectional speaker is used as the center speaker 2. In the present embodiment, as shown in FIG. 2, the directivity of the center speaker 2 is made unidirectional by attaching a cylindrical duct 8 having sound absorbing properties in front of the diaphragm 2a. However, the means for making the directivity of the center speaker 2 unidirectional is not limited to this.

Between the armrest 7 of the chair and the center speaker 2, an orientation adjusting device 9 that makes the direction of the center speaker 2 variable is provided. An example of the orientation adjusting device 9 is shown in FIGS. The orientation adjustment device 9 changes the orientation of the center speaker 2 in the left-right direction and the up-down direction, and includes, for example, a left-right direction adjustment mechanism 10 and an up-down direction adjustment mechanism 11. The left-right direction adjusting mechanism 10 includes, for example, a base 12 fixed to a chair, a swivel plate 14 attached to the base 12 so as to be able to swivel around a vertical axis 13, and an actuator 15 for turning the swivel plate 14. Yes. The actuator 15 is, for example, an electric motor (hereinafter referred to as a turning drive motor 15). A worm gear 16 is attached to the output shaft of the turning drive motor 15, and the worm gear 16 meshes with a gear portion 14 a formed on the turning plate 14. Therefore, the rotation of the turning drive motor 15 is decelerated and transmitted to the turning plate 14. By switching the rotation direction of the turning drive motor 15, the turning plate 14 can be turned rightward or leftward. The orientation adjusting device 9 is not limited to one that can adjust the orientation of the center speaker 2 in both the left-right direction and the up-down direction, but can be adjusted only in either the left-right direction or the up-down direction. It may be.

The vertical adjustment mechanism 11 includes, for example, a support body 17 fixed to the swivel plate 14, a holder 19 attached to the support body 17 so as to be rotatable about a horizontal axis 18, and a tilt of the holder 19 by rotating the holder 19. The actuator 20 is configured. The actuator 20 is, for example, an electric motor (hereinafter referred to as a vertical drive motor 20). A worm gear 21 is attached to the output shaft of the vertical drive motor 20, and the worm gear 21 meshes with a gear portion 19 a formed on the holder 19. Therefore, the rotation of the vertical drive motor 20 is decelerated and transmitted to the holder 19. By switching the rotation direction of the vertical drive motor 20, the holder 19 can be rotated upward or downward to change the inclination.

The operation switches (not shown) of the motors 15 and 20 are provided on the upper surface of the armrest 7, for example. Both the turning drive motor 15 and the up / down driving motor 20 may be operated by one operation switch, or the turning drive motor 15 and the up / down driving motor 20 are respectively operated using separate operation switches. You may make it operate separately.

Further, the motors 15 and 20 of the direction adjusting device 9 (hereinafter referred to as the left and right direction adjusting device 9) of the left and right center speakers 2 may be operated by the left and right common operation switches, or the left and right direction adjusting device. A dedicated operation switch may be provided for every nine so as to be operated separately on the left and right. Further, when the motors 15 and 20 of the left / right direction adjusting device 9 are simultaneously operated by a common operation switch, the left / right direction adjusting device 9 is moved symmetrically, and is placed in front of the central portion in the width direction of the chair. The virtual sound source 28 may be always created.

In the present embodiment, the center speaker 2 includes an optical sighting device 22 that emits a sighting beam in a direction in which sound is emitted. As the optical sighting device 22, for example, a laser pointer that irradiates a laser beam as a sighting light beam, a sighting device that irradiates the sighting light by aligning the traveling direction of visible light using a lens, and the like can be used. The optical sighting device 22 is attached to the distal end portion of the center speaker 2 in a state where the sound output direction and the irradiation direction of the aiming light beam are exactly matched. In the present embodiment, the optical sighting device 22 is fixed to the distal end portion of the duct 8. The irradiation switch of the optical sighting device 22 is provided, for example, in the vicinity of the operation switch of the direction adjusting device 9. However, it is also possible to irradiate / stop irradiation of the aiming beam in conjunction with the on / off operation of the operation switch of the direction adjusting device 9 without providing the irradiation switch. By providing the optical sighting device 22, the orientation of the center speaker 2 can be visually confirmed, and the orientation of the center speaker 2 can be facilitated.

The first reflector 6 is a display surface of the video display device 1. As the video display device 1, a display that reflects sound, a screen, or the like can be used. However, the present invention is not limited to these, and any other video display device 1 may be used as long as it reflects sound.

The left and right front speakers 3 are incorporated upward, for example, on the front upper surface of the left and right armrests 7. The left and right surround speakers 4 are incorporated, for example, on the upper surfaces of the left and right ends of the backrest. The subwoofer speaker 5 is incorporated inward on the inner side surface of the central portion of the left armrest 7, for example.

Here, at least one of the speakers 3 to 5 other than the center speaker 2 is incorporated in a direction different from the direction toward the seated person (viewer), and the sound output from the speaker is directed toward the seated person. A second reflector 24 that reflects the light may be provided. In this embodiment, the left and right surround speakers 4 are incorporated in a direction different from the direction toward the seated person, and the sound emitted from the left and right surround speakers 4 is applied to the second reflector 24 and reflected toward the seating position. I try to let them. For example, a recess 26 that is elongated in the width direction of the chair is formed on the upper surface of the backrest 25, and the left and right surround speakers 4 are incorporated at both ends of the recess 26. As shown in FIG. 5, the recess 26 is opened obliquely backward, and the left and right surround speakers 4 are also incorporated obliquely backward. The second reflector 24 also functions as a cover plate that closes the recess 26, and its rear edge is attached to the upper surface of the backrest 25 by a hinge (not shown). The second reflector 24 is opened when the left and right surround speakers 4 are used. Then, as shown by a two-dot chain line in FIG. 1, when the second reflector 24 is opened to a predetermined position, locking means (not shown) locks the second reflector 24, and the second reflector 24. Stop while tilting forward. Thereby, the left and right surround speakers 4 are exposed. On the other hand, when the second reflector 24 is closed, the locking means is removed and the second reflector 24 is tilted. The recess 26 is closed by tilting the second reflector 24.

The sound emitted from the left and right surround speakers 4 is reflected by the second reflector 24 toward the seated person. Since the seated person hears the reflected sound, it feels as if the sound source is far from the actual position of the surround speaker 4. By covering the concave portion 26, the concave portion 26 can be hidden and the appearance can be improved when the surround speaker 4 is not used.

The sound emitted forward from the center speaker 2 is reflected by the first reflector 6 and returns toward the seated person. The seated person who heard the reflected sound has the illusion that there is a sound source in front. That is, since the virtual sound source 28 of the sound reproduced by the center speaker 2 can be created in the forward direction, for example, a speech spoken by a video character can be heard from the direction of the video display device. Therefore, it is possible to prevent a sense of discomfort caused by the sound of the center speaker 2 being heard from a direction different from the video. Further, since the uncomfortable feeling can be prevented, the center speaker 2 can be incorporated in the chair, and a so-called all-in-one chair incorporating all the speakers 2 to 5 can be realized. As described above, it is possible to achieve both the incorporation of all the speakers 2 to 5 in the chair of the multi-channel speaker system and the natural way of hearing the sound reproduced by the center speaker 2. In addition, by adopting an all-in-one speaker, it is possible to eliminate the troublesome work of wiring and construction as in the case of separately providing the speaker, and it is possible to easily move the place by moving or changing the layout. .

Also, the sound emitted from the left and right surround speakers 4 is reflected by the second reflector 24 and returns toward the viewer sitting on the chair. The viewer who has listened to the reflected sound has an illusion that the sound source is far from the actual position of the surround speaker 4. Therefore, you can enjoy a more realistic sound.

Also, the seated person listens to the sound from the left and right front speakers 3 and the sound from the subwoofer speaker 5. Thus, 5.1 channel surround can be reproduced by the speakers 2 to 5. And by incorporating all the speakers 2 to 5 into the chair, you can create a sound field around the seated person and enjoy powerful sound without producing a loud sound that resonates throughout the room. And a personal theater can be realized.

In the present embodiment, since the sound reproduced by the center speaker 2 is reflected using the display surface of the video display device 1 that projects video, the virtual sound source 28 can be created on the video display device 1 side. The direction in which the sound emitted from the center speaker of the video is heard can be matched. Therefore, the video can be enjoyed more realistically. In addition, it is not necessary to prepare a dedicated reflector separately, and the cost can be reduced accordingly.

In the speaker built-in chair of the present invention, sound can be emitted from the vicinity of the seated person by incorporating the speakers 2 to 5 into the chair, so that a realistic feeling can be easily obtained with a small volume. In addition, sound can be emitted from the vicinity of the seated person, and it can be satisfied even if the volume of each speaker is low. In addition, an all-in-one system in which all speakers including the center speaker 2 are incorporated can be realized. Further, it is possible to easily move the place by moving or changing the layout, and to improve usability. Furthermore, since there is no need to place wiring or separate speakers in the room, the room can be made clean.

Next, a second embodiment of the speaker built-in chair of the present invention will be shown. In addition, the same code | symbol is attached | subjected to the member same as the member of the speaker built-in chair of FIG. 1, and those detailed description is abbreviate | omitted. In this speaker built-in chair, for example, as shown in FIGS. 7 to 10, a center speaker 2 is installed facing the front at the center in the width direction. In the present embodiment, the left and right front speakers 3 are installed facing the front on the left and right sides. However, it is not always necessary to install the left and right front speakers 3 facing the front, and the left and right front speakers 3 may be installed diagonally forward on the inner side or may be installed diagonally forward on the outer side.

The chair is, for example, a sofa. The sofa of the present embodiment includes three seats 31 to 33, that is, a central fixed seat 31 and movable seats 32 and 33 provided on both the left and right sides of the fixed seat 31. The central fixed sheet 31 has a trapezoidal shape in which the shape seen from above is narrower in the front width than the rear width, and the left and right movable sheets 32 and 33 and the left and right armrest portions 7 It is provided in the direction. The left and right movable seats 32 and 33 can be pulled out forward. A space between the backrest 25 and the rear plate 34 is covered with a pair of left and right covers 35, 35, and parts of the covers 35, 35 are cut away. A second reflector 24 is attached at a position facing the notch 35a of each cover 35, 35 of the rear plate 34 so as to be openable and closable so as to cover the notch 35a. The inner surface of the second reflector 24 is a reflecting surface. This sofa is supported by a plurality of rod-like legs 36. The 1st reflector 6 is provided in the front of the width run center part of a chair.

The speaker system of this embodiment is a 5.1 channel surround system, and there are six types of signals: center (C), left and right front (FR, FL), left and right surround (SR, SL), and subwoofer (SW). A signal is used (FIG. 11). Further, in the present embodiment, three speakers as the center speaker 2, six speakers as the left front speaker 3, six speakers as the right front speaker 3, four speakers as the left surround speaker 4, and right The surround speakers 4 include four speakers, and the subwoofer speakers 5 include two speakers. These speakers are divided into five speaker boxes 37 to 41, for example.

The three center speakers 2, one left front speaker 3, and one right front speaker 3 are incorporated in front of a front center speaker box (hereinafter referred to as an FC speaker box) 37. The FC speaker box 37 is installed on the front surface of the seat base 31a of the fixed seat 31 so that each speaker faces the front of the sofa.

The remaining five left front speakers 3 and one subwoofer speaker 5 are incorporated in a front left speaker box (hereinafter referred to as “FL speaker box”) 38. The five left front speakers 3 are incorporated in the front surface of the FL speaker box 38. The subwoofer speaker 5 is incorporated in the bottom surface of the FL speaker box 38. The FL speaker box 38 is installed on the front surface of the left armrest portion 7 so that the left front speaker 3 faces the front of the sofa.

The remaining five right front speakers 3 and the remaining one subwoofer speaker 5 are incorporated in a front light speaker box (hereinafter referred to as FR speaker box) 39. The five right front speakers 3 are incorporated in the front surface of the FR speaker box 39. The subwoofer speaker 5 is incorporated in the bottom surface of the FR speaker box 39. The FR speaker box 39 is installed on the front surface of the right armrest portion 7 so that the right front speaker 3 faces the front of the sofa.

The four left surround speakers 4 are incorporated in the rear surface of the rear left speaker box (hereinafter referred to as RL speaker box) 40 facing diagonally upward. The RL speaker box 40 is accommodated in a space 42 in the left cover 35 and is fixed to the back surface of the left cover 35 so that the left surround speaker 4 faces the notch 35a.

The four right surround speakers 4 are incorporated in the rear surface of the rear light speaker box (hereinafter referred to as RR speaker box) 41 facing obliquely upward. The RR speaker box 41 is accommodated in a space 42 in the right cover 35 and is fixed to the back surface of the right cover 35 so that the right surround speaker 4 faces the notch 35a.

In this embodiment, in addition to the two subwoofer speakers 5, six vibrators 43 are provided as output destinations of the SW signal. The vibrators 43 are attached to three diaphragms 44 two by two. The vibration plate 44 is attached to the back surface of the seat cushion of the fixed seat 31 and the back surfaces of the seat cushions of the left and right movable seats 32 and 33 so as to vibrate. Therefore, the diaphragm 44 is vibrated by the vibration of the vibrator 43, and the seat cushions of the seats 31, 32, 33 are vibrated.

The C signal is input to the crossover circuit 48 via a level circuit 45 capable of adjusting the sound volume, an equalizer circuit 46 capable of correcting the signal, and a delay circuit 47 capable of adjusting the timing with other signals. The high frequency sound signal is output from the output unit (DA-4) 49 to the amplifier 50 connected to the center speaker (tweeter) 2, and the low frequency sound signal is output from the output unit (DA-5) 49. The signal is output to the amplifier 50 connected to the center speaker (woofer) 2. For example, among the signals having a frequency of 0 Hz to 20 kHz, the crossover circuit 48 outputs a signal of 7.1 kHz or less to the output unit (DA-5) 49 on the woofer side, and outputs a signal larger than 7.1 to the output unit (tweeter side). DA-4) output to 49. However, the frequency distribution is not limited to this.

The FL signal is input to the center side circuit 51 and the front side circuit 52. The input to the circuit 51 on the center side and the input to the circuit 52 on the front side have a ratio of (center side: front side) = (1: 4), for example. However, the ratio is not limited to this. The FL signal input to the center side circuit 51 is output from the output unit 49 to the amplifier 50 connected to the left front speaker 3 of the FC speaker box 37 via the level circuit 45 → the equalizer circuit 46 → the delay circuit 47. The Further, the FL signal input to the front circuit 52 is input to the crossover circuit 48 via the level circuit 45 → the equalizer circuit 46 → the delay circuit 47. The high frequency sound signal is output from the output unit (DA-1) 49 to the amplifier 50 connected to the front speaker (tweeter) 3, and the low frequency sound signal is output from the output unit (DA-2) 49. The signal is output to the amplifier 50 connected to the center speaker (woofer) 3. The frequency distribution in the crossover circuit 48 is set to be the same as that of the C signal crossover circuit 48. However, the setting is not necessarily the same, and the setting may be changed.

The FR signal is input to the center side circuit 51 and the front side circuit 52. The input to the circuit 51 on the center side and the input to the circuit 52 on the front side have a ratio of (center side: front side) = (1: 4), for example. However, the ratio is not limited to this. The FR signal input to the center side circuit 51 is connected from the output unit (DA-8) 49 to the right front speaker 3 of the FC speaker box 37 via the level circuit 45 → the equalizer circuit 46 → the delay circuit 47. It is output to the amplifier 50. The FR signal input to the front circuit 52 is input to the crossover circuit 48 via the level circuit 45 → the equalizer circuit 46 → the delay circuit 47. The high frequency sound signal is output from the output unit (DA-6) 49 to the amplifier 50 connected to the front speaker (tweeter) 3, and the low frequency sound signal is output from the output unit (DA-7) 49. The signal is output to the amplifier 50 connected to the center speaker (woofer) 3. The frequency distribution in the crossover circuit 48 is set to be the same as that of the C signal crossover circuit 48. However, the setting is not necessarily the same, and the setting may be changed.

The left and right front speakers 3 are also provided in the FC speaker box 37 and the sound of the FL signal and the FR signal is also emitted from the central portion in the width direction of the sofa, so that the reflected sound from the first reflector 6 can be increased. That is, when the left and right front speakers 3 are output from only the left and right sides of the sofa, the reflected sound from the first reflector 6 may be insufficient. The sound reflected from the first reflector 6 can be increased by taking out from the part. However, if the reflected sound of the front speakers 3 provided on the left and right sides of the sofa is sufficient, the front speakers 3 do not have to be provided at the center in the width direction of the sofa.

The SL signal is input to the compressor circuit 53 via the level circuit 45 → the equalizer circuit 46 → the delay circuit 47. The compressor circuit 53 prevents an input signal from increasing beyond a preset value. The output from the compressor circuit 53 is input to the amplifier 50 connected to the left surround speaker 4.

The SR signal is input to the amplifier 50 connected to the right surround speaker 4 via the level circuit 45 → the equalizer circuit 46 → the delay circuit 47 → the compressor circuit 53.

The SW signal is input to the circuit 54 on the speaker side and the circuit 55 on the vibrator side. The SW signal input to the circuit 54 on the speaker side passes from the output unit (AN-1) 49 to the woofer speaker 5 of the FL speaker box 38 via the level circuit 45 → the equalizer circuit 46 → the low pass filter 56 → the delay circuit 47. It is output to the connected amplifier 50 and output from the output section (AN-2) 49 to the amplifier 50 connected to the woofer speaker 5 of the FR speaker box 39. The SW signal input to the vibrator-side circuit 55 is output from the output unit (AN-4) 49 to the left via the level circuit 45 → the low-pass filter 56 → the compressor circuit 53 → the equalizer circuit 46 → the delay circuit 47. It is output to the amplifier 50 connected to the vibrator 43 of the diaphragm 44 attached to the movable sheet 32 and connected to the vibrator 43 of the diaphragm 44 attached to the fixed sheet 31 from the output unit (AN-3) 49. Is output from the output unit (AN-5) 49 to the amplifier 50 connected to the vibrator 43 of the diaphragm 44 attached to the right movable seat 33.

In the present embodiment, the diffusion surface 24a in which irregular irregularities are continuously formed is provided on the reflection surface of the second reflector 24. An example of the diffusion surface 24a is shown in FIG. In this embodiment, unevenness is formed in the width direction of the chair, and the unevenness is continued in the vertical direction. However, the present invention is not limited to this, and may be uneven in both the width direction and the height direction of the chair, or may be uneven. Here, that irregular irregularities are continuous means that irregularities having different heights and inclination angles are adjacent to each other. The second reflector 24 is preferably formed of a material that hardly absorbs sound, such as wood or metal. By setting the reflecting surface of the second reflector 24 to the diffusing surface 24a, the sound emitted from the surround speaker 4 is irregularly reflected toward the seated person, and the place where the reflected sound can be heard well can be expanded.

Also, an opening 58 is provided on the inner side surface 7a of the armrest portion 7 of the sofa so as to communicate with the space behind the diaphragm of the subwoofer speaker 5 and open toward the seated person. In this embodiment, the opening part 58 is provided in the inner surface 7a of the armrest part 7 of both right and left sides. However, it is not always necessary to provide the opening 58 in the armrests 7 on both the left and right sides, and the opening 58 may be provided only in one of them, or the opening 58 may not be provided. The position where the opening 58 is provided is not limited to the inner surface 7a of the armrest 7, and the opening 58 may be provided at another position as long as it is open toward the seated person. By providing the opening 58, when the air in the space behind the diaphragm is vibrated by the vibration of the diaphragm of the subwoofer speaker 5, it is possible to generate a wind from the opening 58 toward the seated person. Therefore, it is possible to apply wind to the seated person according to the sound of the subwoofer speaker 5.

In the sofa of the present embodiment, the center speaker 2 is installed facing the front in the center in the width direction of the chair, so that the reflected sound of the first reflector 6 provided on the front can be increased. Therefore, the sound of the center speaker 2 can be heard efficiently.

Further, in the sofa of the present embodiment, in addition to the center speaker 2, the front speaker 3 is also installed facing the front, so that the sound emitted from the front speaker 3 is transmitted to the first reflector 6 or the surrounding wall 57. Can be reflected back to the seated person. The seated person who heard the reflected sound has the illusion that there is a sound source in front. That is, in the same way as the virtual sound source 28 of the sound reproduced by the center speaker 2, the virtual sound source of the sound reproduced by the front speaker 3 can be created at a position away from the seated person, and the sound can be heard from near the seated person. Such a sense of incongruity can be suppressed.

In this embodiment, since the delay circuit 47 is provided in each signal circuit, the sound emission timing of each speaker can be adjusted. By adjusting the sound emission timing of each speaker, it is possible to eliminate the difference in arrival timing to the seated person due to the difference in time until the sound of each speaker reaches the seated person.

In this embodiment, the sound of each channel is output from separate speakers, but the sound of different channels may be mixed and output from the same speaker. For example, a part of the FL signal is output to the front speaker 3 that reproduces the FR signal, the left sound is mixed with the right sound and output from the right surround speaker 4, and a part of the FR signal is output to the FL signal. The sound may be output to the front speaker 3 to be reproduced, and the right sound may be mixed with the left sound and output from the left surround speaker 4.

Next, a third embodiment of the speaker built-in chair according to the present invention will be described. In addition, the same code | symbol is attached | subjected to the member same as the member of the above-mentioned speaker incorporation chair, and those detailed description is abbreviate | omitted. The speaker built-in chair shown in FIG. 13 has all the speakers of the speaker system provided on the legs 59. In this embodiment, all the speakers are incorporated in a single speaker box 61 provided separately from the chair body 60, and the speaker box 61 is used as a leg portion 59 of the chair. In the present embodiment, a 7.1 channel surround system in which left and right surround back speakers 62 are further added to the 5.1 channel surround system is adopted. However, the multi-channel speaker system that can be adopted is not limited to the 7.1-channel surround system, and may be, for example, a 5.1-channel surround system, a 6.1-channel surround system, or the like. Other channel number systems may be used.

The center speaker 2 and the left and right front speakers 3 are on the front surface of the speaker box 61, the left and right surround speakers 4 are on the rear side surfaces of the speaker box 61, the left and right surround back speakers 62 are on the rear surface of the speaker box 61, and the subwoofer speaker 5 is Provided on the bottom surface of the speaker box 61.

The speaker box 61 is formed in a size and strength that can stably support the chair body 60. The speaker box 61 is placed on a floor, for example, and a chair body 60 is placed thereon. That is, the speaker box 61 forms the leg portion 59 of the chair, and the chair body 60 having at least a seat is placed on the speaker box 61, whereby a chair incorporating a speaker of the multi-channel speaker system can be configured. The chair body 60 may be fixed to the speaker box 61, but in some cases, the speaker box 61 may be simply placed without being fixed to the chair body 60.

Compared with the case where the speaker box 61 is incorporated in the seat 31 or the armrest portion 7, the structure becomes simple and the manufacturing cost can be reduced. Further, by changing the chair body 60 placed on the chair, the type of chair with built-in speaker can be changed, which is suitable for increasing the number of chair variations. Furthermore, by replacing the speaker box 61 with a normal leg that does not incorporate a speaker, a normal chair that does not incorporate a speaker can be obtained. Moreover, since all the speakers are incorporated in the single speaker box 61, it is convenient for handling and movement.

In the present embodiment, the leg portion 59 is configured using the speaker box 61 provided separately from the chair body 60, but the speaker box 61 is not necessarily used, and the chair body 60 has a box. A leg portion 59 may be attached, and each speaker may be incorporated in the box-like leg portion 59. Also in this case, since the speaker can be integrated into the leg portion 59, the manufacture becomes easy.

Next, a fourth embodiment of the speaker built-in chair of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member same as the member of the above-mentioned speaker incorporation chair, and those detailed description is abbreviate | omitted. In the third embodiment, the leg portion 59 is constituted by the single speaker box 61. However, in this embodiment, as shown in FIGS. 14 and 15, a pair of left and right provided separately from the chair body 60. The speaker box 61, 61 constitutes a leg 59.

In this embodiment, a 7.1-channel surround system is adopted. However, the multi-channel speaker system that can be adopted is not limited to the 7.1-channel surround system. A one-channel surround system or the like may be used, and a system with other channels may be used as long as the center speaker 2 is provided.

In the third embodiment, there is one center speaker 2 and one subwoofer speaker 5, but in this embodiment, two center speakers 2 and two subwoofer speakers 5 are provided. The left channel speaker is incorporated in the left speaker box 61, and the right channel speaker is incorporated in the right speaker box 61. The left center speaker 2 and the left front speaker 3 are in front of the left speaker box 61, the left surround speaker 4 is in the rear left side of the left speaker box 61, and the left surround back speaker is in the left speaker box 61. On the rear surface, the left subwoofer speaker 5 is provided on the bottom surface of the left speaker box 61. The right surround speaker 4 is provided on the rear right side of the right speaker box 61, the right surround back speaker is provided on the rear surface of the right speaker box 61, and the right subwoofer speaker 5 is provided on the bottom surface of the right speaker box 61. It has been.

The left and right speaker boxes 61 are sized and strong enough to stably support the chair body 60 in a pair of left and right. The left and right speaker boxes 61 are placed on a floor, for example, and a chair body 60 is placed on them. The chair body 60 may be fixed to the left and right speaker boxes 61, but in some cases, the left and right speaker boxes 61 may be simply mounted without being fixed to the chair body 60.

The distance between the left and right speaker boxes 61 is adjusted according to the width of the chair body 60 to be placed thereon. That is, when the chair body 60 having a large width is placed as shown in FIG. 14, the interval between the left and right speaker boxes 61 is widened, and when the chair body 60 having a narrow width is placed as shown in FIG. Reduce the spacing. Thus, by adjusting the distance between the left and right speaker boxes 61, it is possible to cope with a change in the width of the chair main body 60, which is convenient when the chair main body 60 is exchanged for one having a different width.

Also in the speaker built-in chair according to the present embodiment, the structure is simplified and the manufacturing cost is reduced as compared with the case where the speaker box 61 is built into the seat 31 or the armrest portion 7 as in the speaker built-in chair according to the third embodiment. be able to. Further, by changing the chair body 60 placed on the chair, the type of chair with built-in speaker can be changed, which is suitable for increasing the number of chair variations. Furthermore, by replacing the speaker box 61 with a normal leg that does not incorporate a speaker, a normal chair that does not incorporate a speaker can be obtained.

The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above description, the second reflector 24 is provided on the backrest 25, and the sound emitted from the surround speaker 4 is reflected by the second reflector 24 of the backrest 25. In addition, a second reflector 24 is provided on the armrest 7, for example, and either the front speaker 3 or the subwoofer speaker 5, or both the front speaker 3 and the subwoofer speaker 5 are provided on the armrest 7. 24 may be reflected.

Further, any of the front speaker 3, the surround speaker 4, and the subwoofer speaker 5 may be attached to the chair without being provided with the second reflector 24 and facing the seated person.

In the above description, the second reflector 24 is openable and closable, but the second reflector 24 may be fixed in an open state without being openable and closable.

In the above description, the sound emitted from the left and right surround speakers 4 is reflected by one second reflector 24, but the second reflector 24 dedicated to each of the left and right surround speakers 4 is used. May be provided, and the sound may be reflected by using separate second reflectors 24.

In the above description, the optical sighting device 22 is provided in the center speaker 2, but the optical sighting device 22 may be omitted.

In the above description, the electric motors are used as the actuators 15 and 20 of the direction adjusting device 9. However, the electric motor is not limited to the electric motors. For example, the left-right direction adjusting mechanism 10 and the up-down direction adjusting mechanism 11 are arranged at two positions. When the switching type is used, a combination of a solenoid coil and a return spring may be used as the actuators 15 and 20.

In the above description, the orientation adjusting device 9 includes the actuators 15 and 20 and the power of the actuators 15 and 20 is used to adjust the orientation of the center speaker 2. May be adjusted manually.

In the above description, the orientation adjusting device 9 is provided so that the orientation of the center speaker 2 can be adjusted. However, the orientation adjusting device 9 may be omitted and the orientation of the center speaker 2 may be fixed. In this case, it is desirable to install the chair and the first reflector 6 so that the positional relationship with the first reflector 6 is a predetermined positional relationship.

In the above description, the display surface of the video display device 1 is used as the first reflector 6. However, a dedicated reflector may be provided separately from the display surface of the video display device 1. By providing the dedicated reflector, the sound emitted from the center speaker 2 can be reflected toward the seated person even when the sound absorption by the display surface is remarkable. In addition, when providing a dedicated reflector, it is preferable to arrange the reflector in the vicinity of the display surface of the video display device 1.

Fig. 6 shows an example applied to a 6.1 channel surround system. In the 6.1 channel surround system, a rear speaker 27 is added. The rear speaker 27 is incorporated in the center of the upper surface of the backrest 25, for example. In this example, recesses are provided at three locations, the left and right end portions and the center portion of the upper surface of the backrest 25, and the left and right surround speakers 4 and the rear speakers 27 are incorporated in the recesses, and each speaker 4, 4, 27 is provided. A dedicated second reflector 24 is provided. Similar to the sound output from the surround speaker 4, the sound output from the rear speaker 27 is reflected toward the seated person by the second reflector 24.

An experiment was conducted to confirm the effect of providing the diffusing surface 24a on the reflecting surface of the second reflector 24 of the present invention. FIG. 18 shows the chair used in the experiment, and FIG. 19 shows the shape of the diffusing surface 24a of the second reflector 24 used in the experiment. In the experiment, the left surround speaker 4 and the second reflector 24 facing the left surround speaker 4 were used. The experiment was performed when a microphone was installed at the central measurement position 63 and when a microphone was installed at the left measurement position 64. The center measurement position 63 assumes the position of the ear when the viewer sits on the fixed seat 31, and is a position that is approximately 200 mm higher than the uppermost part of the backrest 25. The left measurement position 64 assumes the position of the ear when the viewer sits on the left movable seat 32, and is a position that is approximately 200 mm higher than the top of the backrest 25.

The six veneer plates were fixed to the second reflector 24 using an adhesive tape to form a diffusion surface 24a having a shape of three peaks as shown in FIG. In FIG. 19, the width of the mountain described on the left is 240 mm, the height is 150 mm, the width of the mountain described in the center is 170 mm, the height is 80 mm, and the width of the mountain described on the right is 240 mm. The height was 120 mm. The thickness of the veneer board used was 5 mm. The length of the second reflector 24 was set to 900 mm.

A signal was sent from the measuring instrument to the left surround speaker 4 to produce a sound for measurement. The sound reflected by the diffusing surface 24a of the second reflector 24 or the wall around the chair was spread with a microphone and measured with a measuring instrument.

The results are shown in FIG. 16 and FIG. The results obtained when the diffusing surface 24a is provided on the reflecting surface of the second reflector 24 are indicated by solid lines, and the results obtained when the reflecting surface of the second reflector 24 used for comparison is a flat surface are two points. Shown with a chain line. FIG. 16 shows the measurement results when the microphone is installed at the central measurement position 63, and FIG. 17 shows the measurement results when the microphone is installed at the left measurement position 64. 16 and 17, the vertical axis represents volume and the horizontal axis represents frequency. As is apparent from the figure, by providing the diffusing surface 24a on the reflecting surface of the second reflector 24, the sound volume tends to decrease at the left measurement position 64 in the entire measured frequency. There was a tendency for the sound volume to increase at the measurement position 63. As a result, by providing the diffusing surface 24a on the reflecting surface of the second reflector 24, it can be confirmed that the reflected sound is suppressed from concentrating on a specific place, and the places where the reflected sound can be heard well are widened. It was.

Claims (11)

1. A chair in which each speaker of a multi-channel speaker system including a center speaker that reproduces sound from the front is arranged facing the video display device, and the center speaker is installed in the front. A speaker built-in chair characterized by reflecting sound to the body and creating a virtual sound source in front.
2. The speaker built-in chair according to claim 1, wherein the first reflector is a display surface of an image display device.
3. The speaker built-in chair according to claim 1, further comprising: an orientation adjusting device that makes the orientation of the center speaker variable; and an optical sighting device that emits an aiming beam in a direction in which the center speaker emits sound.
4. A second reflector that incorporates at least one of the speakers other than the center speaker in a direction different from the direction toward the seated occupant and reflects the sound emitted from the speaker toward the seated occupant is provided. The speaker built-in chair according to claim 1.
5. The speaker built-in chair according to claim 1, wherein the center speaker is installed in the center in the width direction toward the front.
6. 6. The speaker built-in chair according to claim 5, wherein left and right front speakers are installed on both left and right sides facing the front.
7. The speaker built-in chair according to claim 4, wherein a diffusion surface in which irregular irregularities are continuously formed is provided on a reflection surface of the second reflector.
8. The speaker built-in chair according to claim 1, further comprising: a subwoofer, and an opening that opens to a seated person and communicates with a space behind the diaphragm of the subwoofer.
9. The speaker built-in chair according to claim 1, wherein all the speakers of the speaker system are provided on the legs.
10. 10. The speaker built-in chair according to claim 9, wherein the leg portion is a speaker box provided separately from the chair body.
11. The speaker built-in chair according to claim 10, wherein the speaker box is a pair of left and right speaker boxes.

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