JP2007221485A - Speaker-incorporated chair, chair-installed speaker system, headrest and bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a listener to listen high-quality sounds containing sufficient low sounds. <P>SOLUTION: When a listener 100 sits on, a speaker-incorporated chair 1 outputs reproduced sounds in a state where a duct end 8AL of a circular duct 8L attached on an enclosure 6L of a speaker unit 5L is positioned near the ears 101L of the listener 100. In this way, low sounds with a sufficient volume level radiated from the duct end 8AL of the circular duct 8L working as a bass-reflex duct can be allowed to reach the inlet of the external auditory meatus 102L of the listener 100, together with medium-high sounds from the speaker unit 7L, and thus, the listener 100 can listen to excellent reproduced sounds with a sufficient sound pressure level to comparatively low frequency bands. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a speaker built-in chair, a chair-mounted speaker device, a headrest, and a bed, and is suitable for application to, for example, a speaker built-in chair incorporating a speaker device.

  Conventionally, a speaker built-in chair has been proposed in which the speaker is incorporated in the chair so that the speaker is positioned in the vicinity of the listener's ear when the listener is seated on the seat of the chair. (For example, refer to Patent Document 1).

In this speaker built-in chair, since the distance between the built-in speaker and the listener's ear is relatively close, it is only necessary to output a small volume sound from the speaker as compared with a general stationary speaker device. The listener can listen to a sound with a sufficient volume, and sound leakage to the surroundings can be kept small.
JP 2004-16522 A (Page 6, FIG. 1)

  However, in the speaker built-in chair having such a structure, the speaker unit is incorporated into the chair, and thus the diameter of the speaker unit, the volume of the housing, and the like are limited. As a result, the bass is insufficient and the sound quality is not always good. There was a problem that the listener could not listen to the sound.

  The present invention has been made in consideration of the above points, and intends to propose a speaker built-in chair, a chair-mounted speaker device, a headrest, and a bed that allow a listener to listen to high-quality sound including sufficient bass. It is.

  In order to solve such a problem, the speaker built-in chair of the present invention has a backrest part for leaning the upper body when the listener sits on the seat part, and a space provided in a predetermined position of the backrest part. A speaker unit that is attached to one surface of the housing unit and is provided with a predetermined distance between the listener's ears when the listener sits on the seat and leans the upper body against the backrest; A tubular duct extended so as to allow the sound generated inside the body part to reach the vicinity of the listener's ear is provided.

  As a result, when the listener is seated on the speaker built-in chair, middle and high sounds from the speaker unit reach the listener's ear, and a sufficiently low sound is output from the tubular duct that reaches the vicinity of the listener's ear. Can be reached.

  In the speaker built-in chair according to the present invention, a seat for the listener to sit, a housing provided at a predetermined position near the seat and having a space inside, and attached to one surface of the housing, Provided is a speaker unit that is provided with a predetermined distance between the ears of the listener when sitting on the seat, and a tubular duct that is extended so that the sound generated inside the housing reaches the vicinity of the ears of the listener I did it.

  As a result, when the listener is seated on the speaker built-in chair, middle and high sounds from the speaker unit reach the listener's ear, and a sufficiently low sound is output from the tubular duct that reaches the vicinity of the listener's ear. Can be reached.

  Furthermore, in the speaker device for mounting a chair according to the present invention, a housing portion having a space inside, a mounting portion for mounting the housing portion on the chair, and a listener mounted on one surface of the housing portion. A speaker unit that is provided with a predetermined distance between the ears of the listener when sitting on the speaker and a tubular duct that is extended so that the sound generated inside the housing part reaches the vicinity of the ears of the listener. did.

  As a result, when the listener is seated on the chair to which the speaker device for mounting the chair is attached, the middle and high sounds from the speaker unit reach the ears of the listener, and a sufficient volume is obtained from the tubular duct that reaches the ears of the listener. The bass can reach the listener's ear.

  Furthermore, in the headrest of the present invention, the headrest is attached to a chair, and has a housing portion provided in the headrest with a space inside, and attached to one surface of the housing portion, and the listener sits on the seat portion of the chair. The speaker unit is provided with a predetermined distance between the listener's ears and the tubular duct extended so that the sound generated inside the casing reaches the vicinity of the listener's ears.

  As a result, when the listener is seated on the chair to which the headrest is attached, middle and high sounds are made to reach the listener's ear from the speaker unit, and bass with a sufficient volume is received from the tubular duct that has reached the vicinity of the listener's ear. Can reach your ears.

  Furthermore, in the bed of the present invention, the listener is a bed on which a listener has a space inside and is provided at a predetermined position of the bed, and is attached to one surface of the casing, and the listener is at a predetermined position of the bed. A speaker unit that is provided with a predetermined distance from the listener's ear when lying on the tube, and a tubular duct that is extended so that the sound generated inside the casing reaches the vicinity of the listener's ear. did.

  As a result, when the listener lies on the bed, the middle and high sounds from the speaker unit reach the listener's ear, and a sufficiently low sound reaches the listener's ear from the tubular duct that reaches the vicinity of the listener's ear. be able to.

  According to the present invention, when the listener is seated on the speaker built-in chair, the middle and high sounds from the speaker unit reach the ears of the listener, and the bass sound having a sufficient volume is received from the tubular duct that reaches the vicinity of the listener's ears. A speaker built-in chair that can reach the listener's ears and thus allow the listener to listen to high-quality sound including sufficient bass can be realized.

  Further, according to the present invention, when the listener is seated on the chair to which the speaker device for mounting the chair is seated, the middle and high sounds from the speaker unit reach the listener's ear, and from the tubular duct that reaches the vicinity of the listener's ear. It is possible to realize a chair-mounted speaker device that can cause a bass having a sufficient volume to reach the listener's ear and thus allow the listener to listen to a high-quality sound including a sufficient bass.

  Further, according to the present invention, when the listener is seated on the chair to which the headrest is attached, the loudspeaker unit reaches the listener's ears while the loudspeaker duct has a sufficient volume from the tubular duct that reaches the listener's ears. It is possible to realize a headrest that allows a low sound to reach the listener's ear and thus allows the listener to listen to high-quality sound including a sufficient low sound.

  Further, according to the present invention, when the listener lies on the bed, the middle and high sounds from the speaker unit reach the listener's ear, and the bass of sufficient volume from the tubular duct that reaches the vicinity of the listener's ear. A bed that can reach the ear and thus allows the listener to listen to high-quality sound including sufficient bass is realized.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Speaker Built-in Chair Configuration In FIG. 1, a speaker built-in chair 1 according to the first embodiment includes a seat 2 for seating a person, and the person. It has a backrest 3 for leaning the back of the person when seated on the seat 2 and left and right armrests 4L and 4R for hanging the elbow of the person, It is designed to allow humans to be seated in the same way as a general chair.

  Furthermore, the speaker built-in chair 1 has speaker portions 5L and 5R incorporated in the left and right upper portions of the backrest portion 3. The speaker portions 5L and 5R are configured around the housing portions 6L and 6R each having a space having a predetermined volume therein, and are aligned with substantially circular holes respectively provided on the front surfaces of the housing portions 6L and 6R. The speaker units 7L and 7R for converting the electrical signal into sound (hereinafter referred to as reproduction sound) are respectively attached.

  Incidentally, in the speaker units 7L and 7R, an electric signal generated by a reproduction process of a CD (Compact Disc) player or a DMP (Digital Music Player) (not shown) is amplified by an amplifier device (not shown) and the like via a connection cable (not shown). By being supplied, the electric signal is converted into sound.

  In addition, tubular ducts 8L and 8R in which a substantially tubular member having a predetermined inner diameter and a predetermined length is curved into a predetermined shape pass through the upper surfaces of the casing portions 6L and 6R on the upper surfaces of the casing portions 6L and 6R. It is attached. Incidentally, the tubular ducts 8L and 8R have a substantially circular cross-sectional shape.

  In practice, the speaker portions 5L and 5R function as bass reflex type speakers as a whole by causing the tubular ducts 8L and 8R to act as bass reflex ducts, respectively.

  Note that the speaker units 5L and 5R are configured substantially symmetrically as shown in FIG. 1, and therefore, the left speaker unit 5L will be mainly described below as an example.

  In the speaker built-in chair 1, the positions of the speaker parts 5L and 5R in the backrest part 3, the shapes of the tubular ducts 8L and 8R, etc. are adjusted in advance, and a person who wants to listen to sound as shown in FIGS. When this is seated on the listener 100), the duct ends 8AL and 8AR can be positioned in the vicinity of the ears 101L and 101R of the listener 100.

  In the following, the front direction of the listener 100 when the listener 100 is correctly seated on the speaker built-in chair 1 is the front direction, the opposite side is the rear direction, and the left direction and the right direction when viewed from the seated listener 100 are It will be explained after being defined.

  By the way, in a general bass reflex type speaker, the duct is provided only inside the casing and is not extended to the outside. Therefore, for comparison with the speaker built-in chair 1, a speaker built-in chair 10 as shown in FIG. 4 corresponding to FIG. 1 is assumed. In this speaker built-in chair 10, speaker units 15 </ b> L and 15 </ b> R that are general bass reflex type speakers are incorporated in the upper portion of the backrest unit 3 in place of the speaker units 5 </ b> L and 5 </ b> R (FIG. 1).

  As shown in FIG. 5, the speaker unit 15L includes a speaker unit 7L attached to the housing unit 16L, a tubular duct 18L attached to the inside of the housing unit 16L, and a duct end 18AL in the housing unit 16L. A through hole is provided at a position so that the tubular duct 18L can act as a bass reflex duct.

  In the case of the speaker unit 15L, when the position of the speaker unit 7L is regarded as a virtual sound source position (hereinafter referred to as a virtual sound source position) PM, the middle and high sounds radiated from the speaker unit 7L are listeners. The path length EM to reach the outer ear canal entrance 102L of 100 and the bass emitted from the duct end 18AL through the tubular duct 18L when the duct end 18AL is regarded as the virtual sound source position PL2 are the ear canal of the listener. Comparing with the path length EL2 until reaching the entrance 102L, the path length EM≈path length EL2.

  Here, FIG. 6 shows the frequency characteristics of the sound reaching the ear canal entrance 102L from the speaker unit 15L. As shown in FIG. 6, the general bass reflex type speaker unit 15L has a mid-high sound radiated from the speaker unit 7L and having a frequency characteristic as shown by the characteristic curve SM, and the end of the duct transmitted through the tubular duct 18L. The bass sound having a frequency characteristic as shown by the characteristic curve SL2 radiated from the unit 18AL is combined to reach the ear canal entrance 102L of the listener 100.

  As a result, the speaker unit 15L causes the listener 100 to listen to the reproduced sound in which the sound pressure level in the low frequency range in the characteristic curve SM is increased to some extent, as indicated by the characteristic curve SG2 obtained by synthesizing the characteristic curve SM and the characteristic curve SL2. Can do.

  On the other hand, in the speaker unit 5L (FIG. 3) of the speaker built-in chair 1 according to the present invention, the middle and high sounds radiated from the speaker unit 7L when the speaker unit 7L is regarded as the virtual sound source position PM are the ear canal entrance of the listener 100. The bass length EM to reach 102L and the bass emitted from the duct end 8AL through the tubular duct 8L when the duct end 8AL is regarded as the virtual sound source position PL1 are the ear canal entrance 102L of the listener 100 Comparing with the path length EL1 until reaching, path length EM> path length EL1.

  Here, the frequency characteristics of the sound reaching the external auditory canal entrance 102L from the speaker unit 5L are shown in FIG. Since the speaker unit 5L is a kind of bass reflex type speaker as described above, similarly to the case shown in FIG. 6, the middle and high sounds radiated from the speaker unit 7L and having frequency characteristics as shown by the characteristic curve SM, The low frequency sound having a frequency characteristic as shown by the characteristic curve SL1, which is transmitted through the tubular duct 8L and radiated from the duct end 8AL, is combined to reach the ear canal entrance 102L of the listener 100.

  By the way, in general, the distance from the sound source and the sound pressure level are inversely proportional. Here, when the path lengths of the speaker unit 5L (FIG. 3) and the speaker unit 15L (FIG. 5) are compared, the relationship of path length EL1 <path length EL2 is established. That is, the speaker unit 5L (FIG. 3) has a virtual sound source position PL1 positioned closer to the listener's ear canal entrance 102L than the virtual sound source position PL2 of the speaker unit 15L (FIG. 5). The bass emitted from the part 8AL (virtual sound source position PL1) can reach the ear canal entrance 102L at a higher sound pressure level than that of the speaker part 15L.

  That is, as shown in FIG. 8 with the characteristic curve superimposed, the bass characteristic curve SL1 due to the tubular duct 8L is generally compared with the bass characteristic curve SL2 due to the tubular duct 18L due to the relationship of path length EL1 <path length EL2. The sound pressure level increases.

  As a result, the speaker unit 5L of the speaker built-in chair 1 has a low sound pressure level in the characteristic curve SM as shown in the characteristic curve SG1 obtained by synthesizing the characteristic curve SM and the characteristic curve SL1 ( It is possible to make the listener listen to the reproduced sound having a sufficient sound pressure level up to a relatively low frequency band, which is higher than the characteristic curve SG2).

  Here, when the characteristic curve SG1 is compared with the characteristic curve SG2, the sound pressure level in the characteristic curve SG2 decreases relatively steeply as it goes to the low frequency range, whereas in the characteristic curve SG1, the low frequency range side. It can be seen that the degree of decrease in the sound pressure level becomes milder as the process proceeds.

  That is, the speaker unit 5L transmits a good reproduced sound having a high sound pressure level over a wide frequency band, in other words, including a sufficiently low frequency range, to the ear canal entrance 102L of the listener 100 as compared with the speaker unit 15L. Can be heard.

  Incidentally, in the speaker unit 5L, the internal volume of the housing unit 6L is 0.18 [l], the effective vibration radius of the diaphragm of the speaker unit 7L is 15 [mm], and the equivalent mass Md of the vibration system is 0.8 [g]. The lowest resonance frequency f0 is 250 [Hz], and the resonance Q0 is 0.8. The tubular duct 8L has an inner diameter of 8 [mm], an effective length of 180 [mm], and a distance from the upper surface of the housing 6L to the duct end 8AL of about 100 [mm].

  On the other hand, the speaker portion 15L is configured in the same manner as the speaker portion 5L except that the effective length of the tubular duct 18L is 80 [mm].

  In order to measure the actual frequency characteristics of the speaker unit 5L and the speaker unit 15L, measurement models 20 and 30 whose cross-sectional views are shown in FIGS. 9A and 9B were used. In the measurement models 20 and 30, the measurement microphone MC is installed at a position 150 mm away from the surface (so-called baffle surface) to which the speaker unit 7 is attached, and based on the sound collected by the measurement microphone MC. The frequency characteristic is measured.

  In the measurement model 20, instead of the tubular duct 8L, a measurement tubular duct 28L having the same inner diameter and effective length as the tubular duct 8L is provided in the housing 6L. Similarly, in the measurement model 30, instead of the tubular duct 18L, a measurement tubular duct 38L having the same inner diameter and effective length as the tubular duct 18L is provided in the housing portion 16L.

  When actual frequency characteristics were measured using the measurement models 20 and 30, a characteristic curve SG11 (in the case of the speaker unit 5L) as shown in FIG. 10A and a characteristic curve as shown in FIG. SG12 (in the case of the speaker unit 15L) was obtained.

  In this FIG. 10, like the theoretical frequency characteristic shown in FIG. 8, the sound pressure level of the characteristic curve SG11 of the speaker unit 5L is higher than the characteristic curve SG12 of the speaker unit 15L in the low sound range of about 150 [Hz] or less. It has become. That is, it is shown that the speaker unit 5L can actually make the listener 100 listen to a good reproduction sound including a sufficiently low sound.

  As described above, when the speaker built-in chair 1 is seated on the listener 100, the speaker unit 7L emits medium and high-pitched sounds, and is extended from the housing 6L to the vicinity of the ear 101L of the listener 100 so that the bass reflex duct can be used. By radiating the low sound of the reproduced sound from the duct end portion 8AL of the tubular duct 8L acting as the above, it is possible to make the listener 100 hear a good reproduced sound including a sufficient low sound.

(1-2) Operation and Effect In the above configuration, when the speaker built-in chair 1 according to the first embodiment is seated on the listener 100, the tubular duct 8L provided in the housing 6L of the speaker 5L. The reproduced sound based on the audio signal supplied from the external amplifier is output in a state where the duct end portion 8AL is positioned in the vicinity of the ear 101L of the listener 100.

  At this time, the speaker unit 5L (FIG. 3) of the speaker built-in chair 1 has a duct end of the tubular duct 8L that is longer than the path length EM until the middle / high sound radiated from the speaker unit 7L reaches the ear canal entrance 102L of the listener 100. Since the path length EL1 until the bass radiated from the part 8AL reaches the external ear canal entrance 102L is shortened, the characteristic curve SL1 is changed to the characteristic curve SL1 with respect to the middle and high sounds as shown in the characteristic curve SM (FIG. 6). As shown, a bass having a relatively high sound pressure level can reach the ear canal entrance 102L.

  Accordingly, the speaker portion 5L of the speaker built-in chair 1 is shown in the characteristic curve SG1 (FIG. 7) and the characteristic curve SG11 (FIG. 10A) by extending the tubular duct 8L to the vicinity of the ear 101L of the listener 100. As a result, the listener 100 can listen to a good reproduced sound having a sufficient sound pressure level up to a relatively low sound range.

  In this case, since the tubular duct 8L is extended to the vicinity of the ear 101L of the listener 100, the speaker unit 5L of the speaker built-in chair 1 outputs from the tubular duct 18L in a general bass-reflex speaker unit 5L (FIG. 5). The bass sound having a large sound pressure level such as the characteristic curve SL1 (FIG. 7) can be made to reach the ear canal entrance 102L of the listener 100 as compared to the bass like the characteristic curve SL2 (FIG. 6). The listener 100 can listen to a bass sound that tends to be insufficient due to the relatively small diameter of the 7L and slightly away from the ear 101L at a sufficient sound pressure level.

  Further, the speaker unit 5L of the speaker built-in chair 1 does not increase the reproduction volume of the low sound, but allows the low sound emission port to approach the ear canal entrance 102L so that a sufficient low sound reaches the eardrum (not shown) of the listener 100. Therefore, for example, compared to the case where bass is reproduced using a large-diameter speaker, subwoofer, or the like, bass and vibration leaking to the surroundings can be substantially eliminated. Therefore, for example, when the listener 100 listens to the reproduced sound through the speaker built-in chair 1 in the middle of the night, a good reproduced sound including a sufficient low sound can be obtained without worrying about inconvenience to the vicinity and surroundings. You can enjoy it.

  In addition, since the speaker built-in chair 1 allows the listener to listen to a bass having a sufficient volume level by bringing the bass emission port close to the eardrum 103L, it is not necessary to increase the diameter of the speaker unit 7L unnecessarily. Since the size of 6 can be minimized, the entire speaker built-in chair 1 does not need to be unnecessarily enlarged.

  According to the above configuration, when the speaker built-in chair 1 is seated on the listener 100, the duct end 8AL of the tubular duct 8L provided in the housing 6L of the speaker 5L is connected to the vicinity of the ear 101L of the listener 100. By outputting the reproduced sound while being positioned at the position of the listener 100, a low and high sound level radiated from the duct end portion 8AL of the tubular duct 8L acting as a bass reflex duct is output together with the medium and high sounds from the speaker unit 7L. Since it is possible to reach the entrance 102L, it is possible to cause the listener 100 to listen to a good reproduction sound having a sufficient sound pressure level up to a relatively low sound range.

(2) Second Embodiment (2-1) Configuration of Speaker Built-in Chair In FIG. 11, the speaker built-in chair 50 according to the second embodiment is built-in the speaker according to the first embodiment described above. Similar to the chair 1 (FIG. 1), a person (listener 100) can be seated as a whole.

  However, the speaker built-in chair 50 according to the second embodiment is different from the speaker built-in chair 1 according to the first embodiment described above, and the front speaker unit 55L corresponding to the speaker units 5L and 5R (FIG. 1). And 55R are attached to the outside of the left and right armrests 4L and 4R.

  The housing portion 56L of the front speaker portion 55L has a predetermined internal volume, and the speaker unit 7L is attached to one surface thereof. Further, the housing portion 56L is attached to the armrest portion 4L after the sound emitting surface of the speaker unit 7L is adjusted so as to face toward the ear when the listener 100 (FIG. 2) sits on the speaker built-in chair 50. It has been.

  The casing 56L is provided with a tubular duct 58L corresponding to the tubular duct 8L (FIGS. 1 to 3). The tubular duct 58L penetrates from the inside of the housing portion 56L to the outside, and further extends to a position near the ear 101L when the listener 100 (FIG. 2) sits on the speaker built-in chair 50.

  Here, the tubular duct 58L is calculated in advance so that the inner diameter and the effective length satisfy the predetermined conditions, and like the tubular duct 8L of the speaker built-in chair 1 according to the first embodiment, the tubular duct 58L functions as a duct of a bass reflex speaker. It is made to do. As a result, the speaker unit 55L operates as a bass-reflex type speaker, similar to the speaker unit 5L in the first embodiment.

  For this reason, the speaker built-in chair 50 emits medium and high-pitched sounds from the speaker unit 7L of the front speaker unit 55L as well as the speaker built-in chair 1 according to the first embodiment described above, and from the housing unit 6L. By radiating the low sound of the reproduced sound from the tip of the tubular duct 58L that is extended to the vicinity of the ear of the listener 100 and acts as a bass reflex duct, a medium high sound and a sufficiently low sound reach the eardrum (not shown) of the listener 100. Therefore, it is possible to make the listener 100 listen to a good reproduction sound including a sufficient bass.

  Further, rear speaker portions 59L and 59R are attached to the rear side of the backrest portion 3 of the speaker built-in chair 50. The housing portion 60L of the rear speaker portion 59L has substantially the same internal volume as the housing portion 56L of the front speaker portion 55L, and a speaker unit 61L equivalent to the speaker unit 7L is attached.

  For this reason, the speaker built-in chair 50 supplies the front channel audio signals in a sound source of, for example, 4-channel surround (that is, front left, front right, rear left and rear right) from the predetermined amplifier device to the front speaker units 55L and 55R. Then, by supplying the rear channel audio signal of the sound source to the rear speaker units 59L and 59R, it is possible to give the listener 100 a surround feeling.

  Furthermore, the speaker built-in chair 50 has a front amplifier channel and a low-pitched channel sound that are both front left and right in a predetermined amplifier device with respect to a 5.1 channel sound source widely used in movie content, digital television broadcasting, and the like. By being distributed to the channel and the front right channel, the surround of the 5.1 channel can be simulated by the listener 100 by four speakers such as the front speaker units 55L and 55R and the rear speaker units 59L and 59R. .

(2-2) Operation and Effect In the above configuration, the speaker built-in chair 50 (FIG. 11) according to the second embodiment is seated on the listener 100 in the same manner as the speaker built-in chair 1 according to the first embodiment. When this is done, the reproduced sound based on the audio signal supplied from the external amplifier with the tip of the tubular duct 58L extended from the housing portion 56L of the front speaker portion 55L being positioned in the vicinity of the ear of the listener 100 Is output.

  At this time, the front speaker portion 55L of the speaker built-in chair 50 is similar to the speaker portion 5L of the speaker built-in chair 1 in that the tubular duct 58L is extended to the vicinity of the ear 101L of the listener 100, whereby the characteristic curve SG1 (FIG. 7). ) And the characteristic curve SG11 (FIG. 10A), the listener 100 can listen to a good reproduced sound having a sufficient sound pressure level up to a relatively low sound range.

  In this speaker built-in chair 50, since the front speaker unit 55L is positioned in front of the ear 101L of the listener 100, the speaker unit 5L is the listener 100 like the speaker built-in chair 1 in the first embodiment. Compared with the case where it is located behind the ear 101L, the listener 100 can hear the reproduced sound that can recognize a more natural sound image localization.

  Furthermore, the speaker built-in chair 50 can give the listener 100 a surround feeling by outputting reproduced sound from the rear speaker units 59L and 59R in addition to the front speaker units 55L and 55R.

  According to the above configuration, when the speaker built-in chair 50 according to the second embodiment is seated on the listener 100, similarly to the speaker built-in chair 1 according to the first embodiment, the housing of the speaker unit 55L. By outputting the playback sound with the tip of the tubular duct 58L provided in the portion 56L being positioned in the vicinity of the ear 101L of the listener 100, the tubular duct 58L that acts as a bass reflex duct together with the mid-high sound from the speaker unit 7L. Since it is possible to reach the eardrum (not shown) of the listener 100 with a sufficiently low sound level radiated from the tip of the sound, a good reproduction sound having a sufficient sound pressure level up to a relatively low sound range is given to the listener 100. Can be heard.

(3) Third Embodiment (3-1) Configuration of Chair-Mounted Speaker Device In FIG. 12, the chair-mounted speaker device 70 according to the third embodiment is the speaker according to the first embodiment described above. The built-in chair 1 (FIG. 1) has a configuration in which the speaker portions 5L and 5R are made independent from the backrest portion 3, and is composed of a left speaker portion 75L and a right speaker portion 75R.

  Note that the speaker units 75L and 75R are substantially symmetrical as shown in FIG. 12, and therefore, the following description will mainly focus on the left speaker unit 75L as an example.

  The housing portion 76L of the speaker portion 75L has a predetermined internal volume, the speaker unit 7L is attached to the front surface, and the tubular duct 8L (see FIGS. A tubular duct 78L corresponding to 3) is attached.

  Like the tubular duct 8L of the speaker built-in chair 1, the tubular duct 78L is a substantially cylindrical member having a predetermined inner diameter and a predetermined length, and penetrates from the inside to the outside of the housing portion 76L. .

  Actually, the speaker unit 75L operates as a bass reflex type speaker like the speaker unit 5L in the first embodiment. At this time, the tubular duct 78L functions as a bass reflex duct.

  An attachment portion 79L for attaching and fixing the speaker portion 75L to the chair backrest portion is provided below the housing portion 76L. The mounting portion 79L has the same configuration as a general clamp, and can adjust to a backrest portion having various thicknesses by adjusting the mounting screw 79AL.

  In practice, as shown in FIG. 13, the speaker unit 75L is attached to the upper left side of the backrest part 203 of the chair 200 having a general configuration via an attachment part 79L. At this time, the distal end of the tubular duct 78L is positioned in the vicinity of the ear of the listener 100 (not shown) seated on the seat portion 202.

  As a result, similar to the speaker built-in chair 1 in the first embodiment, the chair-mounted speaker device 70 emits medium and high-pitched sounds from the speaker unit 7L of the speaker unit 75L and the listener 76L from the housing unit 76L. By radiating the low sound of the reproduced sound from the tip of the tubular duct 78L that extends to the vicinity of the 100 ears and acts as a bass reflex duct, a medium high sound and a sufficiently low sound reach the eardrum (not shown) of the listener 100. Therefore, it is possible to make the listener 100 listen to a good reproduction sound including a sufficient bass.

(3-2) Operation and Effect In the above configuration, the chair-mounted speaker device 70 (FIG. 12) is configured such that the left and right speaker portions 75L and 75R are respectively attached to the upper left and right of the backrest portion 203 of the chair 200. Similarly to the speaker built-in chair 1 according to the first embodiment, when the listener 100 is seated on the chair 200, the tip of the tubular duct 78 </ b> L extended from the housing portion 76 </ b> L of the speaker portion 75 </ b> L is near the ear of the listener 100. In the positioned state, the reproduction sound based on the audio signal supplied from the external amplifier is output.

  At this time, similarly to the speaker unit 5L of the speaker built-in chair 1, the speaker unit 75L of the chair-mounted speaker device 70 has a characteristic curve SG1 (FIG. 7) because the tubular duct 78L is extended to the vicinity of the ear of the listener 100. In addition, it is possible to make the listener 100 listen to a good reproduced sound having a sufficient sound pressure level up to a relatively low sound range, as shown in the characteristic curve SG11 (FIG. 10A).

  Furthermore, since the chair-mounted speaker device 70 can be mounted on various chairs via the mounting portions 79L and 79R, the chair-mounted speaker device 70 should be mounted on the chair 200 such that the listener 100 can obtain a high satisfaction in terms of sitting comfort, for example. Thus, when the listener 100 is seated on the chair 200, it is possible to hear a good reproduction sound in a comfortable sitting state.

  The chair-mounted speaker device 70 changes the distance from the tip of the tubular duct 78L to the ear 101L of the listener 100 by finely adjusting the mounting positions of the left and right speaker portions 75L with respect to the chair 200. As a result, the balance between the mid-high sound and the low sound in the reproduced sound to be listened to by the listener 100 is changed.

  In other words, the chair-mounted speaker device 70 changes the sound quality of the reproduced sound heard by the listener 100 according to the preference of the listener 100 by adjusting the mounting position with respect to the chair 200 according to the preference of the listener 100. Can do.

  According to the above configuration, when the chair-mounted speaker device 70 according to the third embodiment is attached to the backrest portion 203 of the chair 200, the speaker unit is similar to the speaker built-in chair 1 according to the first embodiment. By outputting the reproduced sound with the tip of the tubular duct 78L provided in the 75L housing portion 76L positioned in the vicinity of the ear of the listener 100, the tubular that acts as a bass reflex duct together with the mid-high sound from the speaker unit 7L. Since a bass having a sufficient volume level radiated from the tip of the duct 78L can reach the eardrum (not shown) of the listener 100, a good reproduced sound having a sufficient sound pressure level up to a relatively low frequency range can be obtained. 100 can be heard.

(4) Fourth Embodiment (4-1) Configuration of Speaker Built-in Headrest In FIG. 14, a speaker built-in headrest 80 according to the fourth embodiment is attached to a seat 300 of an automobile and attached to the seat 300. It is designed to support the head of a seated person (listener 100).

  The speaker built-in headrest 80 is provided with substantially rod-like legs 81L and 81R extending downward, and the legs 81L and 81R are attached to the attachment parts 301L and 301R provided at the upper part of the backrest part 303 in the seat 300. Is inserted into and fixed to the seat 300.

  Also, in the speaker built-in headrest 80, speaker units 85L and 85R corresponding to the speaker units 5L and 5R of the speaker built-in chair 1 (FIG. 1) according to the first embodiment described above are incorporated on the left side and the right side, respectively. It is.

  Note that the speaker units 85L and 85R are configured substantially symmetrically as shown in FIG. 14, and therefore, the following description will mainly focus on the left speaker unit 85L as an example.

  The casing portion 86L of the speaker portion 85L has a predetermined internal volume, the speaker unit 7L is attached to the front surface, and a tubular duct corresponding to the tubular duct 8L (FIGS. 1 to 3) of the speaker built-in chair 1. 88L is attached.

  Similar to the tubular duct 8L of the speaker built-in chair 1, the tubular duct 88L is a substantially cylindrical member having a predetermined inner diameter and a predetermined length, and penetrates from the inside to the outside of the housing portion 86L. .

  In practice, the speaker unit 85L is configured to operate as a bass reflex speaker, like the speaker unit 5L in the first embodiment, and at this time, the tubular duct 88L functions as a bass reflex duct.

  Actually, when the listener 100 is seated on the seat 300 with the speaker built-in headrest 80 attached to the upper part of the backrest 303 of the seat 300, the tip of the tubular duct 88L of the speaker 85L is connected to the listener 100 ( (Not shown) near the ear.

  As a result, similarly to the speaker built-in chair 1 in the first embodiment, the speaker built-in headrest 80 emits medium and high sounds from the speaker unit 7L of the speaker unit 85L and the listener 100 from the housing unit 86L. The bass sound of the reproduction sound is radiated from the tip of the tubular duct 88L that is extended to the vicinity of the ear and acts as a bass reflex duct, so that a medium and high sound and a sufficiently low sound reach the eardrum (not shown) of the listener 100. Therefore, it is possible to cause the listener 100 to listen to a good reproduction sound including a sufficient bass.

(4-2) Operation and effect In the above configuration, the speaker built-in headrest 80 is attached to the upper part of the backrest part 303 in the seat 300, so that the speaker built-in chair 1 according to the first embodiment When the listener 100 is seated on the seat 300, an audio signal supplied from an external amplifier with the tip of the tubular duct 88L extended from the casing 86L of the speaker unit 85L positioned in the vicinity of the ear of the listener 100 Outputs playback sound based on.

  At this time, the speaker portion 85L of the speaker built-in headrest 80 is similar to the speaker portion 5L of the speaker built-in chair 1 in that the tubular duct 88L is extended to the vicinity of the ear of the listener 100, so that the characteristic curve SG1 (FIG. 7) and As shown in the characteristic curve SG11 (FIG. 10A), the listener 100 can listen to a good reproduced sound having a sufficient sound pressure level up to a relatively low sound range.

  Furthermore, the speaker built-in headrest 80 can be attached to various seats 300 via the legs 81L and 81R. For this reason, for example, even when a normal headrest with no built-in speaker is attached in advance to the seat 300 of the automobile, the normal headrest is simply replaced with the speaker-embedded headrest 80 using the seat 300 as it is. Thus, it is possible to make the listener 100 seated on the seat 300 hear a good reproduction sound.

  According to the above configuration, when the speaker built-in headrest 80 according to the fourth embodiment is attached to the backrest portion 303 of the seat 300, the speaker portion 85L is the same as the speaker built-in chair 1 according to the first embodiment. The tubular duct that acts as a bass reflex duct together with the mid-high sound from the speaker unit 7L by outputting the reproduced sound in a state where the tip of the tubular duct 88L provided in the housing portion 86L is positioned in the vicinity of the ear of the listener 100 Since a bass having a sufficient volume level radiated from the tip of 88L can reach the eardrum (not shown) of the listener 100, a good reproduced sound having a sufficient sound pressure level up to a relatively low frequency range can be obtained. Can be heard.

(5) Fifth Embodiment (5-1) Configuration of Speaker Built-in Bed In FIG. 15, the speaker built-in bed 90 according to the fifth embodiment is for a person (listener 100, not shown) to lie down. The mattress 92 is sandwiched between the head board 93 and the foot board 94 from the front-rear direction.

  In the following description, the foot side when the listener 100 lies on the mattress 92 is defined as the front direction, the head side is defined as the rear direction, and the left direction and the right direction when the listener 100 lies on its back are defined. explain.

  Speaker portions 95L and 95R corresponding to the speaker portions 5L and 5R of the speaker built-in chair 1 (FIG. 1) according to the first embodiment described above are incorporated in the upper left and right sides of the head board 93.

  Note that the speaker units 95L and 95R are configured substantially symmetrically as shown in FIG. 15, and therefore, the left speaker unit 95L will be mainly described below as an example.

  The housing portion 96L of the speaker portion 95L has a predetermined internal volume, and the speaker unit 7L is attached to the front surface thereof. Further, the casing 96L is provided with a tubular duct 98L corresponding to the tubular duct 8L (FIGS. 1 to 3).

  Similar to the tubular duct 8L of the speaker built-in chair 1, the tubular duct 98L is a substantially cylindrical member having a predetermined inner diameter and a predetermined length, and penetrates from the inside of the housing portion 96L to the outside, and the listener 100 (not shown). Is extended to a position near the ear when lying on the mattress 92.

  Actually, the speaker unit 95L operates as a bass reflex type speaker, like the speaker unit 5L in the first embodiment, and at this time, the tubular duct 98L functions as a bass reflex duct.

  For this reason, the speaker built-in bed 90 emits medium and high-pitched sounds from the speaker unit 7L of the speaker unit 95L as well as the listener 96 from the housing unit 96L, like the speaker built-in chair 1 according to the first embodiment described above. By radiating the low sound of the reproduced sound from the tip of the tubular duct 98L that extends to the vicinity of the ear of 100 and acts as a bass reflex duct, the medium and high sounds and a sufficiently low sound reach the eardrum (not shown) of the listener 100. Therefore, it is possible to cause the listener 100 to listen to a good reproduction sound including a sufficient bass.

(5-2) Operation and Effect In the above configuration, the speaker built-in bed 90 is the first embodiment when the listener 100 (not shown) lies on the mattress 92 so that the head is directed to the headboard 93 side. Similarly to the speaker built-in chair 1 according to the form, an audio signal supplied from an external amplifier in a state where the tip of the tubular duct 98L extended from the housing portion 96L of the speaker portion 95L is positioned near the ear of the listener 100 Outputs playback sound based on.

  At this time, similarly to the speaker portion 5L of the speaker built-in chair 1, the speaker portion 95L of the speaker built-in bed 90 has the characteristic curve SG1 (FIG. 7) and the tubular duct 98L extended to the vicinity of the ear of the listener 100. As shown in the characteristic curve SG11 (FIG. 10A), the listener 100 can listen to a good reproduced sound having a sufficient sound pressure level up to a relatively low sound range.

  According to the above configuration, the speaker built-in bed 90 according to the fifth embodiment is similar to the speaker built-in chair 1 according to the first embodiment when the listener 100 lies down. By outputting the playback sound with the tip of the tubular duct 98L provided in the 96L positioned in the vicinity of the ear of the listener 100, the tip of the tubular duct 98L that acts as a bass reflex duct along with the mid-high sound from the speaker unit 7L. Since a low-pitched sound with a sufficient volume level radiated from the sound can reach the eardrum (not shown) of the listener 100, the listener 100 can listen to a good reproduced sound having a sufficient sound pressure level up to a relatively low sound range. be able to.

(6) Other Embodiments In the first to fifth embodiments described above, the sectional shapes of the tubular ducts 8L and 8R, 58L and 58R, 78L and 78R, 88L and 88R, and 98L and 98R are substantially the same. Although the case of making it circular is described, the present invention is not limited to this, and it may be made to be substantially elliptical or substantially rectangular. In short, it has a predetermined cross-sectional area so that it can function as a bass reflex duct. It only has to be.

  In the first embodiment described above, the case where the speaker portions 5L and 5R are incorporated in the backrest portion 3 has been described. However, the present invention is not limited to this. For example, the speaker portions 5L and 5R are armrests. You may make it incorporate in various places, such as the parts 4L and 4R, and the seat part 2. FIG. In this case, the tubular ducts 8L and 8R may be extended to the vicinity of the ears 101L of the seated listener 100, and the effective lengths and inner diameters of the tubular ducts 8L and 8R may be designed to values that can act as bass reflex ducts. In this case, the chair does not have to have a backrest portion or an armrest portion, and may have at least a seat portion for the listener to sit on.

  Further, in the above-described second embodiment, the case where the tubular ducts 58L and 58R are provided only in the front speaker portions 55L and 55R has been described. However, the present invention is not limited to this, and for example, the rear speaker portion 59L and Tubular ducts extending to the vicinity of the ears of the listener 100 may be provided on 59R, or the tubular ducts may be provided only on the rear speaker portions 59L and 59R.

  Further, in the second embodiment described above, the case where the rear speaker portions 59L and 59R are provided has been described. However, the present invention is not limited to this, and the rear speaker portions 59L and 59R are not provided. Also good. Alternatively, in addition to the front speaker units 55L and 55R and the rear speaker units 59L and 59R, two or more sets of speaker units may be provided such that the side speaker units are provided on the left and right sides of the listener 100L.

  Further, in the above-described third embodiment, the case where the speaker portions 75L and 75R are attached to the upper portion of the backrest portion 203 of the chair 200 has been described, but the present invention is not limited to this, and the speaker portion 75L and You may make it attach 75R to various places, such as the seat part 202 of the chair 200, an armrest part, and a leg part. In this case, the tubular ducts 78L and 78R may be extended to the vicinity of the ear 101L of the seated listener 100, and the effective lengths and inner diameters of the tubular ducts 78L and 78R may be designed to values that can act as bass reflex ducts.

  Further, in the above-described third embodiment, the case where the attachment portions 79L and 79R are configured in the same shape as a general clamp has been described. However, the present invention is not limited to this, for example, the attachment portion. 79L and 79R may have a clip shape, and may have various shapes such as sandwiching the backrest 203 or the like by the elastic force of the spring.

  Further, in the above-described fourth embodiment, the case where the speaker built-in headrest 80 is attached to the seat 300 of the automobile has been described. However, the present invention is not limited to this, and for example, the speaker built-in headrest 80 is attached to a movie. You may make it attach to various seats, such as a hall, a train, an airplane, and a ship.

  Further, in the fifth embodiment described above, the case where the speaker units 95L and 95R are incorporated in the head board 93 has been described. However, the present invention is not limited to this, and the speaker units 95L and 95R are, for example, mattresses 92. It may be incorporated in various portions of the bed, such as being built in, or attached to the left and right outer sides of the side frames 91L and 91R.

  Furthermore, in the first to fifth embodiments described above, the speaker units 7L and 7R are attached to the housing portions 6L and 6R, 56L and 56R, 76L and 76R, 86L and 86R, 96L and 96R, respectively. However, the present invention is not limited to this, and two or more speaker units may be provided in each housing unit to form a so-called multi-way configuration.

  The present invention can also be used in chairs and beds provided in homes and various facilities, or chairs provided in various moving means for transporting personnel such as vehicles and aircraft.

It is a rough-line perspective view which shows the whole structure of the speaker built-in chair by 1st Embodiment. It is a rough-line perspective view which shows the state in which the listener was seated. It is a rough-line perspective view which shows the path length of the middle high tone and the low tone in the speaker part of this invention. It is an approximate line perspective view showing composition of a speaker built-in chair in which a general bass reflex type speaker is built. It is a rough-line perspective view which shows the path length of the mid-high sound and the low sound in a general bass-reflex type speaker part. It is a basic diagram which shows the frequency characteristic in a general bass-reflex type speaker. It is a basic diagram which shows the frequency characteristic in the speaker built-in chair by this invention. It is a basic diagram which shows a theoretical frequency characteristic. It is a basic diagram which shows the structure of the measurement model of a speaker part. It is a basic diagram which shows the frequency characteristic of the speaker part by actual measurement. It is a rough-line perspective view which shows the whole structure of the speaker built-in chair by 2nd Embodiment. It is a rough-line perspective view which shows the whole structure of the chair mounting type speaker apparatus by 3rd Embodiment. It is a rough-line perspective view which shows the attachment state of a chair attachment type speaker apparatus. It is a rough-line perspective view which shows the whole structure of the speaker built-in headrest by 4th Embodiment. It is a rough-line perspective view which shows the whole structure of the speaker incorporating bed by 5th Embodiment.

Explanation of symbols

  1, 10, 50 .. Speaker built-in chair, 2, 12, 202 .. Seat part, 3, 13, 53, 203, 303 .. Backrest part, 4L, 4R, 54L, 54R .. Armrest part, 5L. 5R, 15L, 15R, 20, 30, 75L, 75R, 85L, 85R, 95L, 95R ... Speaker section, 6L, 6R, 16L, 16R, 56L, 56R, 76L, 76R, 86L, 86R, 96L, 96R ... ... Case, 7L, 7R ... Speaker unit, 8L, 8R, 18L, 18R, 28L, 38L, 58L, 58R, 78L, 78R, 88L, 88R, 98L, 98R ... Tubular duct, 55L, 55R ... Front speaker unit, 59L, 59R ... Rear speaker unit, 70 ... Chair-mounted speaker device, 79L, 79R ... Mounting unit, 80 ... Speaker built-in headrest 90 ...... speaker built-in bed, 92 ...... mattress, 93 ...... head board, 94 ...... footboard, 200 ...... chair, 300 ...... seat.

Claims (8)

A backrest for leaning the upper body when the listener sits on the seat,
A housing part provided at a predetermined position of the backrest part and having a space inside;
A speaker unit that is attached to one surface of the housing part and is provided with a predetermined distance between the listener's ears when the listener sits on the seat and leans the upper body against the backrest;
A speaker built-in chair, comprising: a tubular duct extended so that sound generated inside the casing reaches the vicinity of the listener's ear. The tubular duct is
The speaker built-in chair according to claim 1, which functions as a duct of a bass reflex speaker. A backrest that contacts the back of the listener when the listener sits on the seat,
The speaker built-in chair according to claim 1, wherein the casing is built in the backrest. A seat for the listener to sit,
A housing part provided in a predetermined position near the seat part and having a space inside;
A speaker unit that is attached to one surface of the housing unit and is provided with a predetermined distance between ears of the listener when the listener sits on the seat;
A speaker built-in chair, comprising: a tubular duct extended so that sound generated inside the casing reaches the vicinity of the listener's ear. A rear speaker unit mounted to be positioned behind the listener's ear,
The housing part is
The speaker built-in chair according to claim 4, wherein the speaker unit is provided at the predetermined position in the vicinity of the seat so that the speaker unit is positioned in front of the ear of the listener. A casing having a space inside;
An attachment part for attaching the housing part to a chair;
A speaker unit that is attached to one surface of the housing part and is provided with a predetermined distance between the listener's ears when the listener sits on the seat of the chair;
A speaker device for mounting a chair, comprising: a tubular duct extended so as to allow sound generated inside the casing to reach the vicinity of an ear of the listener. A headrest attached to a chair,
A housing part having a space inside and provided in the headrest;
A speaker unit that is attached to one surface of the housing part and is provided with a predetermined distance between the listener's ears when the listener sits on the seat of the chair;
A headrest comprising: a tubular duct extended to allow sound generated inside the casing to reach the vicinity of an ear of the listener. The bed where the listener lies,
A housing part having a space inside and provided at a predetermined position of the bed;
A speaker unit that is attached to one surface of the housing part and has a predetermined distance between the listener's ears when the listener lies on a predetermined position of the bed;
A bed comprising: a tubular duct extended to allow sound generated inside the casing to reach the vicinity of an ear of the listener.

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