JP2001285975A - Acoustic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple acoustic device for obtaining an excellent acoustic effect at all times. SOLUTION: This acoustic device is provided with a seat part 110 provided with a backrest part 113 and a sitting part 114, a pair of main frames 120 in a closed loop shape constituted of armrest frames 121 attached to both side edges of the backrest part, a grounded frame 122, front leg frames 123 attached to both side edges of the sitting part and connected to one end of the armrest frame and one end of the grounded frame and rear leg frames 124 connected to the other end of the armrest frame and the other end of the grounded frame, and a pair of sub frames 130 whose one end is connected to the front leg frame and other end is connected to the rear leg frame. The armrest frame is provided with a first vibration unit 140 and the sub frame is provided with a second vibration unit 150 for the lower register.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an acoustic device,
In particular, the present invention relates to a chair-type acoustic device in which a vibration unit is integrated.

[0002]

2. Description of the Related Art A conventional chair-type acoustic device in which a vibration unit is integrated is disclosed, for example, in Japanese Patent Application Laid-Open No. H11-17905.
There is one described in Japanese Patent Publication No. This acoustic device has a built-in speaker on both sides of the upper part of a back plate of a chair composed of a seat plate and a back plate, and a diaphragm built in substantially the center of the seat plate and the back plate. For a user sitting in the room, the high frequency range propagates through a speaker, and the low frequency range propagates through a diaphragm.

[0003] Another conventional chair-type acoustic device in which another vibration unit is integrated is disclosed in, for example, Japanese Utility Model Registration No. 30444587. This sound device has a built-in speaker for the whole range on both upper sides of a backrest portion of a chair composed of a seating portion and a backrest portion, and the inside of the seating portion and the backrest portion is formed to be hollow, and a low-range speaker is provided. Is built-in, the whole range propagates to the user sitting in the chair through the whole range speaker, and the low range propagates through the opening provided in the seating part and the backrest part. It has become.

[0004]

The chair-type acoustic device in which the former vibration unit is integrated as described above generates mechanical vibration in a low-frequency range on a diaphragm that is pressed against a part of the user's body. And give it directly to the user. For this reason, since the vibration is diffused to the entire body of the user, the vibration is propagated to unnecessary parts other than the part of the body to which the vibration should be originally applied, causing a problem that the user is uncomfortable. Further, there is a problem that it is difficult to always obtain a good acoustic effect because a slight change in the contact pressure between the user's body and the diaphragm changes the propagation state of the vibration.

In the chair-type acoustic apparatus in which the latter vibration unit is integrated, the interior of the seat and the backrest constituting the chair need to be hollow, and the seat and the backrest are formed. Since it is necessary to provide an opening in the device, there is a problem that the production is troublesome and the production cost is increased.

In addition, since both of the audio devices have speakers arranged on both sides of the user's both ears, they are used when an image device is installed in front of a chair to view images and audio synchronized therewith. There is a problem of giving a strange feeling to the elderly.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a simple acoustic device which can always obtain a good acoustic effect.

[0008]

According to the present invention, there is provided, in accordance with the present invention, a seat having a backrest and a seat, an armrest frame attached to both side edges of the backrest, a grounding frame, and the seat. Attached to both sides of the part,
And a pair of closed-loops formed by a front leg frame connected to one end of the armrest frame and one end of the grounding frame, and a rear leg frame connected to the other end of the armrest frame and the other end of the grounding frame. A main frame, comprising a pair of sub-frames, one end of which is connected to the front leg frame and the other end of which is connected to the rear leg frame;
The armrest frame has a first vibration unit, and the subframe has a second vibration unit for a bass range.

According to the above construction, the first vibration unit is fixed to the main frame, and the second vibration unit is fixed to the sub-frame connected to the main frame. The user can easily obtain the best listening position by the seat. And the position is fixed, so that it is not necessary to carefully adjust the position of the speaker and the position of the user to produce a stereo effect or 3D effect of the sound, and the sound image localization recorded at the time of content creation can be accurately and easily performed. Can be reproduced.

[0010]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 is a schematic perspective view showing a preferred embodiment of the acoustic device of the present invention, and FIG. 2 is a side view thereof.
The acoustic device 100 has a so-called pipe chair shape, and includes a seat 110, a pair of main frames 120,
20, a pair of subframes 130, 130, a pair of first
The vibration units 140 and 140 are schematically configured by a pair of second vibration units 150 and 150 and a control unit 160.

The seat portion 110 has a structure in which a cushion member 112 is strongly stretched between a pair of pipes 111, 111 bent in a substantially L-shape, and a backrest portion 113 and a seat portion 114 are formed. This cushion material 112
The material of the cloth on the front surface is a mixture of cotton and polyethylene (50% cotton, 50% polyethylene), the material of the cloth on the back side is nylon, and a urethane resin is inserted between the front and back sides. ing.

As a material of this cloth, even if it is stretched when a load is applied, it does not return to its original state when the load is removed, so that the sitting comfort is gradually deteriorated. It is more preferable to use a material that can maintain a sitting comfort, such as a leather, that can be stretched when a load is applied and return to the original state when the load is removed. Note that the cushion material 112 may be stretched on at least one of the backrest 113 and the seat 114.

A pair of main frames 120, 120
It is formed of a pipe bent in a substantially trapezoidal shape, and has a seat 1
10 are attached to both side edges by screws. The main frame 120 includes an armrest frame 121 attached to both side edges of the backrest 113 by screws.
A grounding frame 122 that contacts a floor surface or the like; a front leg frame 123 attached to both side edges of the stool 114 with screws and integrally connected to one end of the armrest frame 121 and one end of the grounding frame 122; The other end of the frame 121 and the rear leg frame 124 integrally connected to the other end of the ground frame 122 form a closed loop.

Each of the pair of sub-frames 130, 130 is formed of a pipe bent in a substantially L-shape, and one end is integrally connected to each of the front leg frames 123, 123, and the other end is connected to each of the rear leg frames 123, 123. 124, 124 are respectively connected integrally.

A pair of first vibration units 140, 140
Is a small one-way speaker with high directivity for the whole sound range, which is fixed to one end of each of wooden armrests 141, 141 mounted on a pair of armrest frames 121, 121 by screws. I have. In this manner, each first vibration unit 140, 140 is connected to each armrest 141, 1
Since it is attached to one end of the first vibration unit 41, the sound image localization is located deeper than the first vibration units 140, 140 as viewed from the user.

A pair of first vibration units 140, 140
Are arranged such that the position of the ear of the user sitting on the seat 110 is near the stereo localization (best listening position). Further, the pair of first vibration units 14
Reference numerals 0 and 140 are arranged such that the cross point position of the vibration emitted from each of the first vibration units 140 and 140 is behind the head of the user sitting on the seat 110.

More specifically, as shown in FIG. 3, the pair of first vibration units 140, 140 are configured such that vibrations W, W emitted from the respective first vibration units 140, 140, The minimum angle θ1 of the angle θ with the straight line C passing through the approximate center of the user U seated at 110 is 28
And the maximum angle θ2 is in the range of 30 °. In addition, from the viewpoint of stereo feeling, θ is preferably 20 degrees or more and 35 degrees or less, and more preferably 25 degrees or more and 32 degrees or less. If θ is smaller than 28 degrees, the sense of sound spread is reduced, and the stereo effect is reduced. On the other hand, if θ is greater than 30 degrees, the stereo effect is increased, but the listening point is pinpointed. Therefore, since recording is basically performed using 28 degrees to 30 degrees as a guide, it is desirable to listen in a similar environment in order to faithfully reproduce the recorded situation. Therefore, from the viewpoint of faithfully reproducing the recorded situation, it is more preferable that θ is 28 degrees or more and 30 degrees or less.

A pair of second vibrating units 150, 150
Is a body sonic (trade name) for a bass range, for example, which is arranged on a wooden plate 151 and fixed by screws. Further, both ends of the plate 151 face the second vibration units 150 and 150 with the backrest 113,
And a pair of sub-frames 130, 130
It is attached by screws between.

The control unit 160 includes the first vibration units 140 and 140 and the second vibration units 150 and 15
0 is an amplifier for controlling the wooden board 161
Are fixed by screws. Further, both ends of the plate 161 are attached between the pair of ground frames 122 by screws.

The control unit 160 includes first vibration units 140 and 140 and second vibration units 150,
There is provided a phase control terminal that allows the user sitting on the seat 110 to vary the phase of the vibration emitted from at least one of the 150. Further, each second vibration unit 150,
A band control terminal is provided to vary the band of vibration emitted from 150 according to the gender of the user sitting on seat 110.

Here, the band of the vibration emitted from each of the second vibration units 150, 150, which can be varied according to the gender of the user, is -6 dB at 125 Hz for men and -6 dB at 100 Hz for women. Thus, the connection between sounds can be improved. In the case where the user is a male, it is preferable that the band of the vibration emitted from the second vibration unit 150 be 0 Hz or more and 135 Hz or less (-6 dB or more). This is because if the vibration band is larger than 135 Hz, the voice band is reproduced, so that there is a disadvantage that a voice can be heard from under the seating portion 114. Further, in consideration of the sound connection with the first vibration unit 140 which is a full-band speaker, it is more preferable that the band of the vibration emitted from the second vibration unit 150 is 0 Hz or more and 130 Hz or less (-6 dB or more). . Furthermore, from the viewpoint of compatibility with the acoustic device 100 according to the present embodiment, the second vibration unit 150
It is more preferable that the frequency band of the vibration generated from is not less than 0 Hz and not more than 125 Hz (-6 dB or more). on the other hand,
When the user is a woman, it is preferable that the band of the vibration emitted from the second vibration unit 150 be 0 Hz or more and 125 Hz or less (-6 dB or more). Vibration band is 1
If the frequency is higher than 25 Hz, the voice band is reproduced, which causes a disadvantage that the voice can be heard from under the seat 114. In addition, considering the sound connection with the first vibration unit 140 which is a full-band speaker, the band of the vibration emitted from the second vibration unit 150 is 0 Hz or more and 110 Hz or less (−6 dB).
Is more preferable. Further, from the viewpoint of compatibility with the acoustic device 100 according to the present embodiment, it is more preferable that the band of the vibration emitted from the second vibration unit 150 be 0 Hz or more and 100 Hz or less (-6 dB or more).

FIG. 4 shows that the audio device 100 includes an image device 10 such as a television and a disk device 20 such as a DVD player.
FIG. 2 is a block diagram illustrating a schematic example of a system when the devices are connected. An audio output signal from the disk device 20 is supplied to a rear line input terminal (Rear LIN) of the control unit 160.
E IN) 161, front line input terminal (Fron)
t LINE IN) 162, and input to a speaker amplifier (stereo) 164 and a low-pass filter (LPF) 165 via an input select switch (Input Select) 163.

The audio signal input to the speaker amplifier (stereo) 164 is amplified, and is amplified by a phase control circuit (phas).
e control) 166 and is controlled to the phase selected by the user via the phase control terminal 167. Then, the audio signal is supplied to a speaker output terminal (Int SP OUT, Ext SP OUT) 16
8, 169, and each first vibration unit 140,
140 is input. Thereby, the sound of the entire sound range is emitted from each of the first vibration units 140 and 140.

Also, a low-pass filter (LPF) 165
The audio signal input to the
The signal is separated in the band selected via 0, input to the vibration unit amplifier 171 and amplified. Then, the audio signal is output from the transducer output terminal (Vt transducer OUT) 172 and is input to each of the second vibration units 150. As a result, low-frequency sounds are emitted from each of the second vibration units 150.

In such a system, when the disk device 20 is, for example, a 5.1ch DVD player,
By allocating 0.1 ch to each of the second vibration units 150, 150, it is possible to experience the sound effect with a powerful impression.

When viewing images and sounds with the system having such a configuration, the user sits on the seat 110, turns on the power switches of the image device 10, the disk device 20, and the control unit 160, and turns on the control unit. Each of the second vibration units 150, 150 via the band control terminal 170 of 160
Adjust the band of your gender.

The vibration of the entire sound range of the sound synchronized with the image projected on the image device 10 is generated by each of the first vibration units 140,
From 140, it propagates through the air and reaches the user. At this time, the user operates the phase control terminal 16 of the control unit 160.
7, the phase of each of the first vibration units 140, 140 can be adjusted. Thus, the vibration of the entire sound range of the sound can pass outside the user's both ears, so that the user can experience the spread of the sound.

At the same time, the low-frequency vibration of the sound synchronized with the image projected on the image device is controlled by the second vibration unit 15.
0, 150 to at least one mainframe 120
Through the cushion material 112 of the seat 110 to reach the user. As described above, since the vibration in the low frequency range of the sound is not directly transmitted to the user's body, and the second vibration unit 150 capable of reproducing the low frequency range that cannot be reproduced by a normal speaker is attached, the user can use the second vibration unit 150. You can experience natural and efficient deep bass.

Here, the structure of the main frame 120, the mounting structure of the second vibration unit 150, and the structure of the seat 110 of the acoustic device 100 of this embodiment are shown in FIG. 2, that is, the main frame 120 has a large ground contact area. The reason why each of the second vibration units 150 and 150 are mounted apart from the user and the seat 110 is determined to be the upholstered structure will be described with reference to comparative examples shown in FIGS. The same components as those in FIG. 2 are denoted by the same reference numerals.

An acoustic device 200 shown in FIG. 5 is a comparative example in which the structure of a main frame 220 is formed in a substantially C shape, that is, an open loop shape. Main frame 22 having such a structure
When it is set to 0, the end 220a of the main frame 220 pushes the floor or the like, so that most of the vibration generated by the second vibration unit 150 escapes to the floor or the like, and the seat 11
There is the disadvantage that it will only propagate slightly to a user sitting at zero.

The acoustic device 300 shown in FIG. 6 is a comparative example in which the second vibration unit 150 is attached to the rear of the main frame 120. In the case of the second vibration unit 150 having such a mounting structure, most of the vibration generated in the second vibration unit 150 propagates to the armrest 141 mounted on the armrest frame 121 and propagates to other parts. There is a disadvantage that it becomes difficult.

An acoustic device 400 shown in FIG. 7 is a comparative example in which the second vibration unit 150 is attached to the rear of the seat 110. With the second vibration unit 150 having such a mounting structure, there is a disadvantage that a user sitting on the seat 110 feels too much the vibration generated by the second vibration unit 150.

The acoustic device 500 shown in FIG. 8 is a comparative example in which a connecting frame 570 is newly connected between the second vibration unit 150 and the seat 110 and attached. When the second vibration unit 150 having such a mounting structure is used, the seat 11
There is a drawback that 0 is abnormally vibrated by the vibration generated in the second vibration unit 150.

The acoustic device 600 shown in FIG.
This is a comparative example in which the upper part of the headrest, that is, the headrest portion is formed high. With the seat 610 having such a structure, the seat 6
The second vibration unit 1 is placed on the head of a user sitting on the
There is a disadvantage that the vibration generated at 50 is concentrated.

The acoustic device 700 shown in FIG.
This is a comparative example in which a reinforcing pipe 770 is connected between a pair of pipes 711, 711 constituting a zero. The seat 710 having such a structure has a drawback that the pipe 770 hits the user sitting on the seat 710.

According to the above-described acoustic device 100, conventionally, it was necessary to carefully adjust the position of the speaker and the position of the user in order to produce a stereo effect or a 3D effect of the sound. 140, 140 and each second
The vibration units 150, 150
0, 120 and each of the sub-frames 130, 130, and the seat 110 allows the user to easily obtain the best listening position and fix the position, so that the above-mentioned position adjustment becomes unnecessary, and is recorded at the time of content creation. Sound image localization can be accurately and easily reproduced.

In the past, heavy bass could only be reproduced with a super woofer or a large speaker, but each small first
Vibration units 140, 140 and each second vibration unit 1
Since 50 and 150 are installed in the near field,
Power consumption is low, and it is possible to experience powerful and high-quality sound regardless of the environment.

Also, in the past, when viewing at an event or a large number of people, only the person sitting near the center of the audio device could reproduce the sound image localization recorded at the time of content creation. Everyone can reproduce the sound image localization recorded during the content creation.

The vibration unit includes, for example, a speaker, a body sonic (trade name), a sensation unit, a transducer, and the like. Further, the vibration unit may be built in the frame as well as being fixed to the frame. Examples of the material of the buffer include urethane resin, cotton, and a so-called sponge. Further, the connection method of each member may be not only fixing by a screw, but also fixing by a string or a rope, welding, bonding, or the like. Sound device 10 of the present embodiment
0 can be applied to, for example, a home theater chair for DVD software, a chair with a home audio playback device for mobile audio, an audio / video chair for events, a chair for relaxation, and a chair for music therapy.

[0041]

As described above, according to the present invention,
It is possible to provide a small-sized and low-cost acoustic device that can always obtain a good acoustic effect.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a preferred embodiment of an acoustic device of the present invention.

FIG. 2 is a side view of the acoustic device of FIG.

FIG. 3 is an exemplary plan view showing an arrangement of a pair of first vibration units of the acoustic device in FIG. 1;

FIG. 4 is a block diagram showing a schematic example of a system when an image device such as a television and a disk device such as a DVD player are connected to the audio device of FIG. 1;

FIG. 5 is a side view showing a comparative example with respect to the structure of the main frame of the acoustic device of FIG. 1;

FIG. 6 is a side view showing a first comparative example of the mounting structure of the second vibration unit of the acoustic device of FIG. 1;

FIG. 7 is a side view showing a second comparative example with respect to the mounting structure of the second vibration unit of the acoustic device of FIG. 1;

FIG. 8 is a side view showing a third comparative example with respect to the mounting structure of the second vibration unit of the acoustic device of FIG. 1;

FIG. 9 is a side view showing a first comparative example for the structure of the seat of the acoustic device of FIG. 1;

FIG. 10 is a side view showing a second comparative example of the structure of the seat of the acoustic device of FIG. 1;

[Explanation of symbols]

100 ... sound device, 110 ... seat, 111 ...
・ Pipe, 112 ・ ・ ・ Cushion material, 113 ・ ・ ・ Backrest part, 114 ・ ・ ・ Seat part, 120 ・ ・ ・ Main frame, 121 ・ ・ ・ Armed frame, 122 ・ ・ ・ Grounding frame, 123 ・ ・ ・ Fore leg Frame, 124 ...
Rear leg frame, 130 ... sub-frame, 140 ...
・ First vibration unit, 141 ... armrest, 150 ...
Second vibration unit, 151... Plate, 160... Control unit, 161,... Rear line input terminal, 162.
· Front line input terminal, 163 ··· input selection switch, 164 ··· speaker amplifier, 165 ··· low-pass filter, 166 ··· phase control circuit, 167 ···
.Phase control terminal, 168... Speaker output terminal, 16
9 Speaker output terminal, 170 Band control terminal, 171 Vibration unit amplifier, 172 Transducer output terminal

Claims (5)

[Claims] 1. A seat having a backrest and a stool, an armrest frame attached to both sides of the backrest, a grounding frame, and one end of the armrest frame attached to both sides of the stool. A pair of closed-loop main frames each including a front leg frame connected to one end of the grounding frame, and a rear leg frame connected to the other end of the armrest frame and the other end of the grounding frame; A pair of sub-frames connected to the front leg frame and the other end connected to the rear leg frame, wherein the armrest frame has a first vibration unit, and the sub-frame is a second sub-frame for a bass range. An acoustic device comprising a vibration unit. 2. The acoustic device according to claim 1, wherein the first vibration unit is arranged such that a position of an ear of a user who sits on the seat is near a stereo orientation of the first vibration unit. 3. The first vibration unit is arranged so that a cross-point position of vibration emitted from each of the first vibration units is behind a head of a user sitting on the seat. An acoustic device according to claim 1. 4. The acoustic device according to claim 1, wherein a phase of a vibration emitted from at least one of the first vibration unit and the second vibration unit is variably configured by a user sitting on the seat. . 5. The acoustic device according to claim 1, wherein a band of vibration emitted from the second vibration unit is variably configured according to a gender of a user sitting on the seat.