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JP2008141691

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2008141691
The present invention provides a natural sound image localization and a high-quality reproduced
sound with a three-dimensional feel to a listener while providing stability at the time of wearing.
SOLUTION: The middle-high-pitched sound electroacoustic conversion unit 2L attached to a
predetermined position of the head 100 of the listener and the middle-high-pitched sound
electroacoustic conversion unit 2L are attached to one surface, and the middle-high-pitched
sound electroacoustic conversion unit 2L is a listener The speaker unit 7L for middle-highpitched sound and the electroacoustic transducer 2L for middle-high-pitched sound are arranged
on the head 100 so that a predetermined distance is provided between the head and the ear
canal inlet 102L of the listener. A band unit 4 for mounting, a bass electroacoustic transducer 3L
mounted on the head 100 of the listener via the band 4, and a bass speaker unit 8L provided for
the bass electroacoustic converter 3L And to provide [Selected figure] Figure 1
Ear speaker device
[0001]
The present invention relates to an ear speaker device, and is suitably applied to, for example, a
head-mounted wearable speaker device.
[0002]
Conventionally, in a headphone device, which is an example of a head-mounted wearable speaker
device, an audio signal representing a reproduction sound of a CD (Compact Disc) or the like in a
state of being attached to the head of a listener What is made to convert into a sound and let this
listener listen to this is widely spread.
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1
[0003]
In a general headphone device, a speaker unit for generating reproduced sound is positioned
near the front of the entrance of the ear canal of the listener, and sound quality is achieved by
causing the sound to directly reach the eardrum from the speaker unit. Although it can be
improved, the sound image is localized in the head of the listener, giving the listener an unnatural
impression.
[0004]
For this reason, in the headphone device, by placing the speaker unit slightly away from the
entrance of the ear canal (ear hole) and positioning it on the forehead side, the sound image is
made out of the head as in the case of using a general stationary speaker. It is devised to
eliminate the sense of unnaturalness by localization and to make it possible to listen to sufficient
bass by making a closed type in which a closed space is formed around the listener's ear (for
example, a patent) Reference 1).
Patent 3054295 (page 3, FIG. 1)
[0005]
By the way, in the headphone device having such a configuration, it is difficult to generate a
sound field having a three-dimensional effect, as it is a structure in which only the reproduced
sound is output from the speaker units provided one on each side. Since it is separated from the
pinnae, there is a problem that the stability at the time of wearing is bad and usability is bad.
[0006]
The present invention has been made in consideration of the above points, and it is an ear
speaker capable of giving natural sound image localization while giving stability at the time of
wearing, and allowing a listener to listen to a high quality reproduced sound having a threedimensional effect. It is an attempt to propose a device.
[0007]
In order to solve such problems, according to the present invention, a first housing attached to a
predetermined position of the head of the listener, and a first housing attached to one surface of
the first housing, the first housing being the head of the listener A speaker unit for middle-high-
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2
pitched sound arranged so as to provide a predetermined distance between the listener and the
ear canal entrance of the listener, a mounting unit for mounting the first housing unit on the
head, and a mounting unit And a speaker unit for low-pitched sound provided to the second
housing unit.
[0008]
As a result, the first case unit having the medium and high sound speaker unit separated by a
predetermined distance from the entrance of the ear canal of the listener, and the second case
unit having the low frequency speaker unit are mounted via the mounting unit. It is possible to
give a natural sound image localization without the sound image being localized in the head, and
the weight at the time of wearing by the speaker unit for middle and high sound and the speaker
unit for low sound divided into two. It is possible to output high-quality reproduced sound with a
three-dimensional effect while improving the balance by distribution.
[0009]
According to the present invention, the mounting portion includes the first housing portion
having the middle to high sound speaker unit separated by a predetermined distance from the
entrance to the ear canal of the listener, and the second housing portion having the low
frequency speaker unit. Because it is placed on the head of the listener, it can give a natural
sound image localization without the sound image being localized in the head, and it can be
attached by the speaker unit for middle and high sound divided into two parts and the speaker
unit for low frequency It is possible to realize an ear speaker device capable of outputting highquality reproduced sound with a three-dimensional effect while improving the balance by weight
distribution.
[0010]
Hereinafter, with reference to the drawings, an embodiment of the present invention will be
described in detail by dividing it into a first embodiment and a second embodiment.
[0011]
(1) First Embodiment (1-1) Configuration of Ear Speaker Device According to First Embodiment
In FIG. 1, reference numeral 1 generally denotes an ear speaker device according to a first
embodiment, and a portable CD (in FIG. An audio signal generated by reproduction processing of
a Compact Disc player or DMP (Digital Music Player) is converted into reproduction sound, and
the listener is made to listen to the sound.
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3
[0012]
Incidentally, in the ear speaker device 1 (FIG. 1), only a portion visible from the left side surface
of the listener is displayed, and a portion visible from the right side surface of the listener is not
displayed.
[0013]
Unlike the general box-shaped speaker device, this ear speaker device 1 is premised to be
mounted on the head 100 of the listener in the same manner as the headphone device, converts
an audio signal into a reproduction sound, and reproduces it. A medium-to-high-tone
electroacoustic converter 2L that mainly outputs middle-to-high-pitched sound among the
sounds, a bass electroacoustic converter 3L that mainly outputs bass in the reproduced sound,
and the mid-to-high-tone electric-acoustic converter 2L and the bass It is comprised by the band
part 4 for mounting | wearing and fixing the electroacoustic transducing part 3L for a head to a
listener's head.
[0014]
That is, the ear speaker device 1 arranges the middle-high-tone electric / acoustic conversion
unit 2L and the bass electro-acoustic conversion unit 3L on the left side of the listener via the
band unit 4 and In order to dispose the electroacoustic transducer 2R (not shown) and the bass
electroacoustic transducer 3R (not shown), headphones of 2.2ch are configured on the left and
right.
[0015]
The band portion 4 is formed in a substantially arch shape convex upward in accordance with
the shape of a general human head 100 centering on the central portion 4A, and is slidably
slidable with respect to the central portion 4A. The length of the entire band portion 4 can be
adjusted by the adjustable portion 4BL.
[0016]
In the band portion 4, the middle-high-pitched sound electroacoustic conversion portion 2 L is
attached to the tip of a substantially L-shaped arm 4 C extended from the middle of the
adjustment portion 4 BL, and a bass at the tip of the adjustment portion 4 BL The electroacoustic
transducer 3L is attached.
[0017]
The band 4 is formed in an arch shape having a diameter smaller than the shape of a general
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4
human head 100 and has an elastic force, and the listener's head is expanded while the bass
electroacoustic transducer 3L is spread. In order to return to the original shape by the action of
the elastic force of the band portion 4 when mounted on the portion 100, the middle-highpitched sound electro-acoustic conversion portion 2L and the bass electro-acoustic conversion
portion 3L are mounted on the head 100 of the listener. It is made to hold | maintain in the state
made to contact | abut.
[0018]
As a result, in the ear speaker device 1, the mid-high / low-tone electroacoustic transducer 2 L is
positioned forward from the auricle 101 L of the listener by a predetermined distance, and the
bass electroacoustic transducer 3 L is placed at the earlobe 101 L of the listener Is positioned
above the front of the
[0019]
The middle-high-pitched electro-acoustic transducer 2L is a middle-high-pitched casing 5L
shaped like a sphere divided in two in the vertical direction, and the baffle plate 2AL is a flat
portion of the middle-high-pitched casing 5L. A middle to high-tone speaker unit 7L for
converting an audio signal to a reproduction sound is attached to the rear of the listener's ear
canal entrance 102L.
[0020]
The middle to high-tone speaker unit 7L emits sound by vibrating the diaphragm according to an
audio signal supplied from a portable CD player, DMP or the like via a connection cable (not
shown). .
[0021]
As a result, the middle-high-pitched electric / acoustic conversion unit 2L of the ear speaker
device 1 directly causes the middle-high-pitched sound radiated from the middle-high-pitched
speaker unit 7L to reach the ear canal entrance 102L of the listener, and also the cheek or
auricle 101L of the listener Can be made to reach the ear canal entrance 102L, so that natural
and three-dimensional sound image localization can be provided as in the case of listening
through a general stationary speaker. There is.
[0022]
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5
The bass electroacoustic transducer 3L is a bass casing 6L that has a substantially spherical
shape as a whole, and the bass speaker unit 8L is provided inside the bass casing 6L.
The bass housing portion 6L is divided into a hemispherical portion 11L located at the upper
side and a cover portion 12L located at the lower side with the bass speaker unit 8L as a
boundary, and the baffle plate 13L of the hemispherical portion 11L is used. On the other hand, a
bass speaker unit 8L for converting an audio signal into a reproduced sound is attached.
[0023]
The low frequency speaker unit 8L mainly emits low frequency sound by vibrating the
diaphragm according to an audio signal supplied from a portable CD player, DMP or the like
through a connection cable (not shown). It is done.
[0024]
The cover portion 12L is attached to the hemispherical portion 11L, has a hemispherical shape
having a space inside, and hides the front space of the bass speaker unit 8L.
Further, the cover portion 12L is attached to an end portion of the surface in a state where a
tubular duct 9L made of metal and bent into a substantially U-shaped hollow member having a
predetermined thickness is penetrated. .
[0025]
The U-shaped portion at the tip of the tubular duct 9L is bent toward the ear canal entrance
102L of the listener, and a hole 9AL is provided substantially at the center of the U-shaped
portion.
[0026]
Therefore, in the ear speaker device 1, the bass speaker unit 8L of the bass electroacoustic
transducer 3L is located slightly above the front of the ear canal entrance 102L when the
speaker unit 1 is properly mounted on the listener, and the hole 9AL of the tubular duct 9L Are
located very near the entrance to the ear canal inlet 102L.
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6
[0027]
In the tubular duct 9L, the hole 9AL is formed in the opposite direction to the ear canal entrance
102L, but since the bass radiated from the hole 9AL does not have directivity, the bass is used
for the ear canal entrance 102L of the listener. On the other hand, while it can be reliably
reached, for the middle and high sound that is emitted slightly from the hole 9AL, the hole 9AL is
directed in the opposite direction to the ear canal entrance, and the middle and high sound has
directivity. , Hardly reach the listener's ear canal entrance 102L.
[0028]
Therefore, in the ear speaker device 1, medium and high tones of reproduced sound are
outputted from the speaker unit 7L for middle and high sound to reach the ear canal entrance
102L of the listener, and only the bass of the reproduced sound from the hole 9AL of the tubular
duct 9L is the ear canal of the listener The middle and high-pitched sound that slightly leaks from
the hole 9AL while being allowed to reach the inlet 102L is output with directivity from the hole
9AL facing in the opposite direction to the listener's ear canal inlet 102L, so the leaked The
middle and high pitched sound does not reach the ear canal entrance 102L of the listener, and
the sound image localization of the listener mainly affected by the middle and high pitched sound
is not adversely affected.
[0029]
In this way, in the ear speaker device 1, while providing natural sound image localization by the
medium and high sound output from the medium and high sound speaker unit 7L, the listener is
made to listen to a sufficient level of bass through the hole 9AL of the tubular duct 9L. It is made
to get.
[0030]
Incidentally, the position of the hole 9AL is not limited to this position, and may be anywhere on
the tubular duct 9L as long as it faces in the opposite direction to the listener's ear canal
entrance.
[0031]
Furthermore, since the tip of the tubular duct 9L is formed in a substantially U-shape, it does not
enter into the ear canal of the listener.
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7
Thus, the ear speaker device 1 can prevent the listener from accidentally damaging the inside of
the ear canal by the tubular duct 9L, for example, when the ear speaker device 1 is attached.
[0032]
Here, as shown in FIG. 2, the bass housing portion 6L of the bass electroacoustic conversion
portion 3L is the cover portion 12L except the tubular duct 9L in a state where the bass speaker
unit 8L is attached to the hemispherical portion 11L. A closed space is formed, and a resonance
circuit is formed by the bass housing portion 6L and the tubular duct 9L with respect to the bass
speaker unit 8L to operate as a Kelton-type speaker.
[0033]
The bass electroacoustic transducer 3L does not block the auricle 101 of the listener, so the
eardrum 103L of the listener does not block the sound generated around the listener (hereinafter
referred to as the ambient sound). As well as being able to reach and listen to it, the low
frequency of the reproduced sound can be made to reach the ear canal entrance 102L directly
from the hole 9AL of the tubular duct 9L so that the listener can hear a sufficient level of low
frequency.
[0034]
Incidentally, the inner diameter of the tubular duct 9L is, for example, 1.8 mm, and the distance
from the surface of the baffle plate 4AL to the hole 8AL of the tubular duct 9L is, for example,
about 35 mm. Absent.
[0035]
Here, since the side surface of the tubular duct 9L is formed substantially in a U shape and the
hole 9AL is provided at the center of the U-shaped portion, two ducts of substantially upper and
lower halves are configured. And the inner diameter (corresponding to about 2.5 [mm] in this
case) when the tubular duct 9L is converted into one tubular duct is taken into consideration, and
The effective length has been determined.
[0036]
That is, by forming the tubular duct 9L in a U-shaped side, the effective length can be set shorter
as compared to the case of one tubular duct, and the design and safety can be greatly improved.
It is done.
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[0037]
As described above, in the ear speaker device 1, when the speaker unit 7 is attached to the head
100 of the listener, the mid to high tone speaker unit 7L of the mid to high tone electroacoustic
transducer 2L is positioned slightly away from the ear canal entrance 102L of the listener. The
medium to high sound of the reproduced sound is radiated from the middle to high sound
speaker unit 7L, and the reproduced sound from the hole 9AL of the tubular duct 9L extended
from the cover 12L of the bass electroacoustic transducer 3L to the vicinity of the ear canal
entrance 102L. By emitting a low-pitched sound, the listener can listen to a good reproduced
sound including a sufficient level of low-pitched sound while giving natural sound image
localization.
[0038]
(1-2) Configuration Example of Another Ear Speaker Device According to the First Embodiment
The ear speaker device 1 according to the first embodiment is, as shown in FIG. 1 and FIG.
Although the band unit 4 mounts the middle-high-tone electric / acoustic converter 2L and the
bass electric / acoustic converter 3L on the head 100 of the listener, the band unit 4 may be
replaced with other various mounting units. By using them, the middle-high-pitched sound
electro-acoustic conversion unit 2L and the bass electro-acoustic conversion unit 3L may be
attached to the head 100 of the listener.
[0039]
In the following, as in the case of the ear speaker device 1 described above, mainly, the middleto-high-tone electric / acoustic converter 2L and the bass electroacoustic converter 3L on the left
side will be described as an example.
[0040]
For example, the ear speaker device 20 shown in FIG. 3 is configured as a so-called undertine
type, and holds the bass electroacoustic transducer 3L instead of the band portion 4 in the ear
speaker device 1 (FIG. 1 and FIG. 2). And a band portion 24 for hooking on the listener's pinna
101L.
[0041]
The band portion 24 is formed in a substantially arch shape convex downward, and is assumed
to be passed left and right under the listener's jaw, and is substantially L-shaped extending from
the middle of the band portion 24 The middle to high frequency electro-acoustic transducer 2L is
attached to the tip of the arm 24C.
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9
[0042]
The ear speaker device 20 (FIG. 3) is configured such that the middle to high-pitched
electroacoustic conversion unit 2L and the low-pitched electroacoustic conversion unit 3L can be
used as the ear speaker unit 24BL of the band unit 24 is hooked to the auricle 101L of the
listener. It can be attached to the unit 100, and like the ear speaker device 1, it is configured to
allow the listener to listen to a good reproduced sound including a sufficient level of bass while
giving a natural sound image localization.
[0043]
Furthermore, the ear speaker device 30 shown in FIG. 4 is configured as a so-called shoulder
hold type, and in place of the band portion 4 in the ear speaker device 1 (FIG. 1 and FIG. A
shoulder arm 34 is used which holds the electroacoustic transducer 3L and supports it from the
shoulder of the listener.
[0044]
The shoulder arm 34 has a substantially L-shaped arm extended from the middle of a rod-like
holding portion 34L, to which a bass electroacoustic transducer 3L is attached at its tip, and
which is hung from the shoulder of the listener. It has a configuration in which the middle-highpitched sound electroacoustic transducer 2L is attached to the tip of 34C.
Further, the central portion 34A of the shoulder arm 34 is formed in a substantially arch shape
convex rearward, and is assumed to be hooked from the back of the neck of the listener to the
upper part of the shoulder and passed from side to side.
[0045]
The ear speaker device 30 (FIG. 4) can be mounted on the listener's head 100 by being hooked
over the shoulders of the listener, and the mid-high-tone electro-acoustic transducer 2L and the
bass electro-acoustic transducer 3L. Similar to the ear speaker device 1, the listener is made to be
able to listen to a good reproduced sound including a sufficient level of bass while giving a
natural sound image localization.
[0046]
Furthermore, the ear speaker device 40 shown in FIG. 5 is configured as a so-called neck band
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type, and instead of the band portion 4 in the ear speaker device 1 (FIG. 1 and FIG. A band unit
44 is used to hold the electroacoustic transducer 3L and to hang it on the auricle 101L of the
listener.
[0047]
The central portion 44A of the band portion 44 is formed in a substantially arch shape that is
convex rearward, and is assumed to be passed behind the back of the back 100 of the listener.
And a substantially L-shaped arm 44C extended from the middle of the band portion 44. The
middle to high-pitched electroacoustic transducer 2L is attached to the tip of the arm 44C.
[0048]
The ear speaker device 40 (FIG. 5) is configured such that the middle to high-pitched electroacoustic transducer 2L and the low-pitched electro-acoustic transducer 3L are hooked by the ear
hooking portion 44BL of the band portion 44 being hooked to the auricle 101L of the listener. It
can be attached to the unit 100, and like the ear speaker device 1, it is configured to allow the
listener to listen to a good reproduced sound including a sufficient level of bass while giving a
natural sound image localization.
[0049]
As described above, according to the present invention, in addition to the band portion 4 (FIGS. 1
and 2) of the ear speaker device 1, mounting portions using various methods such as the ear
speaker devices 20 to 40 (FIGS. 3 to 5) The middle to high-pitched electro-acoustic converter 2L
and the bass electro-acoustic converter 3L may be attached to the head 100 of the listener.
[0050]
(1-3) Operation and Effect in First Embodiment In the above configuration, the ear speaker
device 1 (FIG. 1 and FIG. 2) is attached to the head 100 of the listener, thereby achieving
electroacoustic for medium and high sound. The middle to high sound speaker unit 7L provided
in the middle to high sound housing 5L of the conversion unit 2L is located at a predetermined
distance from the external ear canal entrance 102L of the listener, and slightly above the upper
ear canal entrance 102L of the listener With the hole portion 9AL of the tubular duct 9L of the
bass electroacoustic transducer 3L positioned at the position close to the ear canal entrance
102L, the reproduction sound based on the audio signal supplied from the predetermined
amplifier is output.
[0051]
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11
Thus, in the ear speaker device 1, medium to high sound output from the medium to high sound
speaker unit 7L of the medium to high sound housing 5L located in front of the listener's ear
canal entrance 102L is reflected by the listener's cheek or auricle 101L. Since it can reach the
tympanic membrane 103L, the listener is made to listen to medium to high-pitched sound having
a characteristic similar to that when listening to the reproduced sound through a general
speaker, and the sound image is located outside the head. It can give a sense of stereotacticity.
[0052]
On the other hand, in the ear speaker device 1, since the bass outputted from the bass speaker
unit 8L of the bass housing 6L can directly reach the ear canal entrance 102L through the
tubular duct 9L, the listener's auricle 101L It is possible to listen to a sufficient level of bass
while keeping it open without closing it.
[0053]
In addition, the ear speaker device 1 is sufficient for the eardrum 103L (FIG. 2) of the listener by
bringing the hole portion 9AL of the tubular duct 9L, which is a radiation outlet for bass, close to
the ear canal entrance 102L instead of raising the volume of reproduced bass. Since the bass is
allowed to reach, it is possible to eliminate almost no bass or vibration leaking around, as
compared to the case where the bass is reproduced using, for example, a large-aperture speaker
or a subwoofer.
[0054]
Therefore, for example, when the listener listens to the reproduction sound through the ear
speaker device 1 at midnight, etc., a good reproduction sound including a sufficient level of bass
can be obtained with little concern for troubles in the vicinity or surroundings. You can enjoy it.
[0055]
In addition, since the tubular duct 9L has a U-shaped tip and does not block the ear canal
entrance 102L of the listener, it blocks the ambient sound generated around the listener as well
as the reproduction sound. It can reach the tympanic membrane 103L and make it listen.
[0056]
In this way, in the ear speaker device 1, even when the listener needs to listen to the ambient
sound, such as when the listener walks or plays sports, the ambient sound can be reliably heard
in addition to the good reproduction sound. it can.
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[0057]
In addition, since the ear speaker device 1 does not cover the auricle 101L of the listener with
the middle-high-tone housing 5L of the middle-high-tone electric / acoustic converter 2L as in
the conventional closed-type headphones, the closed type There is no discomfort such as a
feeling of blockage or stuffiness felt by a listener wearing headphones.
Furthermore, in the ear speaker device 1, since the sealed space is not formed, the change of the
resonance frequency in the ear canal which may occur when the sealed type headphone is used
is not generated, and the listener does not feel discomfort.
[0058]
Moreover, since the ear speaker device 1 allows the listener to listen to a low sound of a
sufficient volume level by bringing the hole portion 9AL of the tubular duct 9L, which is a low
emission port, close to the eardrum 103L, the aperture of the low sound speaker unit 8L is not
There is no need to increase the size as necessary, and the size of the bass housing 6L can be
minimized.
As a result, in the ear speaker device 1, the overall size and weight can be suppressed to the
necessary minimum, so that the inconvenience due to the size and weight when the listener
wears the ear speaker device 1 can be minimized.
[0059]
Furthermore, in the ear speaker device 1, the central portion 4A of the band portion 4 is
disposed in the vicinity of the top of the head 100, and the middle to high-tone electroacoustic
transducer 2L and the bass electroacoustic transducer 3L are separately disposed. The weight
balance can be balanced by the middle to high-pitched electro-acoustic transducer 2L and the
low-pitched electroacoustic transducer 3L, thus improving the stability when the head 100 is
worn and improving the sense of wear. .
[0060]
According to the above configuration, when the ear speaker device 1 is attached to the head 100
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of the listener, the mid to high sound speaker unit 7L of the mid to high sound electroacoustic
transducer 2L is slightly forward of the ear canal entrance 102L of the listener. By placing the
hole 9AL of the tubular duct 9L of the bass electroacoustic transducer 3L in the vicinity of the
ear canal entrance 102L, and at the time of wearing. While giving stability, it is possible to give
natural and three-dimensional sound image localization, and allow a listener to hear high-quality
reproduced sound.
[0061]
(2) Second Embodiment (2-1) Configuration of Ear Speaker Device According to Second
Embodiment In FIG. 6 in which parts corresponding to those in FIG. 1 are given the same
reference numerals, 200 is a second embodiment as a whole. An ear speaker device according to
the present invention is configured to convert an audio signal generated by reproduction
processing of a portable CD player or DMP into reproduction sound and allow the listener to
listen to the sound.
[0062]
By the way, also in the ear speaker device 200 (FIG. 6) in this case, only a portion visible from the
left side surface of the listener is displayed, and a portion visible from the right side surface of
the listener is not displayed. It is a symmetrical structure.
[0063]
Unlike a general box-shaped speaker device, this ear speaker device 200 is premised to be
mounted on the head 100 of the listener like the headphone device, and converts an audio signal
into a reproduced sound, and reproduces it. A middle to high tone electroacoustic converter 2L
and a rear middle to high frequency electroacoustic converter 50L that mainly output middle to
high sound in the sound, a bass electroacoustic converter 3L that mainly outputs bass in the
reproduced sound, and A middle-high-pitched electro-acoustic transducer 2L, a rear middle-highpitched electro-acoustic transducer 50L, and a bass electro-acoustic transducer 3L are mounted
on the head of a listener and configured with a band 204 for fixing.
[0064]
That is, the ear speaker device 200 arranges the middle-high-pitched electroacoustic conversion
unit 2L, the rear middle-high-pitched electroacoustic conversion unit 50L, and the low-pitched
electroacoustic conversion unit 3L on the left side of the listener via the band unit 204; The
middle to high frequency electro-acoustic transducer 2R (not shown), the rear middle to high
frequency electro-acoustic transducer 50R (not shown), and the bass electroacoustic transducer
3R (not shown) are disposed on the right side of the listener via In order to do that, it is made to
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constitute the headphone of 4.2ch with right and left.
[0065]
The band portion 204 is formed in a substantially arch shape convex upward in accordance with
the shape of a general human head 100 centering on the central portion 4A, and is slidably
slidable with respect to the central portion 4A. The length of the entire band portion 204 can be
adjusted by the adjustable portion 4BL.
[0066]
In the band section 204, the middle-high-pitched sound electroacoustic conversion section 2L is
attached to the tip of a substantially L-shaped arm 4C extended forward from the middle of the
adjustment section 4BL, and from the middle to the rear of the adjustment section 4BL The rear
low to high frequency electro-acoustic transducer 50L is attached to the tip of the extended
substantially L-shaped arm 204D, and the bass electroacoustic transducer 3L is attached to the
tip of the adjustment portion 4BL. ing.
[0067]
Also, the band portion 204 is formed in an arch shape having a diameter smaller than the shape
of the general human head 100 and has elastic force, and the listener's head is expanded while
the bass electroacoustic transducer 3L is spread. In order to return to the original shape by the
action of the elastic force of the band portion 4 when mounted on the portion 100, the middlehigh-pitched sound electroacoustic conversion portion 2L, the rear middle-high-pitched sound
electroacoustic conversion portion 50L, and the bass electroacoustic conversion The portion 3L
is held in contact with the head 100 of the listener.
[0068]
As a result, in the ear speaker device 200, the middle to high-pitched electroacoustic transducer
2L is positioned forward from the listener's ear by a predetermined distance, and the rear midhigh-pitched electroacoustic transducer 50L is rearwardly to the listener's ear The low-pitched
electroacoustic transducer 3L is positioned slightly above the front of the auricle 101L of the
listener.
[0069]
The middle-high-pitched electro-acoustic transducer 2L is a middle-high-pitched casing 5L
shaped like a sphere divided in two in the vertical direction, and the baffle plate 2AL is a flat
portion of the middle-high-pitched casing 5L. The speaker unit 7L for middle to high sound,
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which converts an audio signal into reproduced sound, is attached to the rear of the ear canal
entrance 102L.
[0070]
The middle to high-tone speaker unit 7L emits sound by vibrating the diaphragm according to an
audio signal supplied from a portable CD player, DMP or the like via a connection cable (not
shown). .
[0071]
The rear middle-high-pitched electro-acoustic transducer 50L, like the middle-high-pitched
electro-acoustic transducer 2L, is a rear mid-high-tone chassis 51L shaped like a sphere divided
into two in the vertical direction, and the rear On the baffle plate 50AL, which is a flat portion of
the middle-high-pitched sound housing 51L, a rear middle-high-pitched speaker unit 53L that
converts an audio signal to a reproduced sound is attached toward the front pinna 101L.
[0072]
The rear middle high-pitched speaker unit 53L is configured to emit sound by vibrating the
diaphragm according to an audio signal supplied from a portable CD player, DMP or the like
through a connection cable (not shown). There is.
[0073]
As a result, the middle-high-pitched electric-acoustic conversion unit 2L and the rear middlehigh-pitched electroacoustic conversion unit 50L of the ear speaker device 200 listen to the
middle-high-pitched sound radiated from the middle-high-pitched speaker unit 7L and the rear
middle-high-pitched speaker unit 53L. Directly to the ear canal entrance 102L and the reflected
sound reflected by the listener's cheek or pinna 101L etc. can also reach the ear canal entrance
102L, so that the sound may be heard through a general stationary speaker. A similar, natural
and more three-dimensional sound image localization can be provided.
[0074]
On the other hand, the bass electroacoustic transducer 3L is a bass chassis 6L that has a
substantially spherical shape as a whole, and the bass speaker unit 8L is provided inside the bass
chassis 6L.
10-05-2019
16
The bass housing portion 6L is divided into a hemispherical portion 11L located at the upper
side and a cover portion 12L located at the lower side with the bass speaker unit 8L as a
boundary, and the baffle plate 13L of the hemispherical portion 11L is used. On the other hand, a
bass speaker unit 8L for converting an audio signal into a reproduced sound is attached.
[0075]
The low frequency speaker unit 8L mainly emits low frequency sound by vibrating the
diaphragm according to an audio signal supplied from a portable CD player, DMP or the like
through a connection cable (not shown). It is done.
[0076]
The cover portion 12L is attached to the hemispherical portion 11L, has a hemispherical shape
having a space inside thereof, and covers the front space of the bass speaker unit 8L.
Further, the cover portion 12L is made of metal, and a tubular duct 9L obtained by bending a
hollow member having a predetermined thickness into a substantially U-shaped side surface is
attached in a state where it penetrates the end portion of the surface of the cover portion 12L. It
is done.
[0077]
The U-shaped portion at the tip of the tubular duct 9L is bent toward the ear canal entrance
102L of the listener, and a hole 9AL is provided substantially at the center of the U-shaped
portion.
[0078]
Therefore, in the ear speaker device 200, the bass speaker unit 8L of the bass electroacoustic
transducer 3L is positioned slightly on the upper front side of the ear canal entrance 102L when
mounted to the listener normally, and the hole 9AL of the tubular duct 9L Are located very near
the entrance to the ear canal inlet 102L.
[0079]
In the tubular duct 9L, the hole 9AL is formed in the opposite direction to the ear canal entrance
10-05-2019
17
102L, but since the bass radiated from the hole 9AL does not have directivity, the bass is used
for the ear canal entrance 102L of the listener. On the other hand, while it can be reliably
reached, for the middle and high sound that is emitted slightly from the hole 9AL, the hole 9AL is
directed in the opposite direction to the ear canal entrance, and the middle and high sound has
directivity. , Hardly reach the listener's ear canal entrance 102L.
[0080]
Therefore, in the ear speaker device 200, the medium to high sound of the reproduced sound is
output from the medium to high sound speaker unit 7L and the rear medium to high sound
speaker unit 53L to reach the ear canal entrance 102L of the listener and reproduced from the
hole 9AL of the tubular duct 9L. While only the low-pitched voice reaches the listener's ear canal
entrance 102L, while the middle and high tones slightly leaked from the hole 9AL, directivity is
given from the hole 9AL directed in the opposite direction to the listener's ear canal entrance
102L. As it is output, the leaked middle and high pitched sound does not reach the ear canal
entrance 102L of the listener, and the middle and high pitched sound slightly leaking from the
hole 9AL does not adversely affect the three-dimensional sound image localization of the listener
It is done.
[0081]
As a result, in the ear speaker device 200, a sufficient level can be obtained through the hole
portion 9AL of the tubular duct 9L while giving natural sound image localization by the medium
to high sound output from the middle to high sound speaker unit 7L and the rear middle to high
sound speaker unit 53L. Is made to allow the listener to listen to the bass of
[0082]
Incidentally, the position of the hole 9AL is not limited to this position, and may be anywhere on
the tubular duct 9L as long as it faces in the opposite direction to the listener's ear canal
entrance.
[0083]
Since the end of the tubular duct 9L is formed in a substantially U-shape, the tubular duct 9L is
configured not to enter the ear canal of the listener.
Thus, the ear speaker device 200 can prevent the listener from accidentally damaging the inside
10-05-2019
18
of the ear canal by the tubular duct 9L when the ear speaker device 200 is attached or the like.
[0084]
The bass housing 6L of the bass electro-acoustic transducer 3L forms a space sealed by the cover
12L except the tubular duct 9L in a state where the bass speaker unit 8L is attached to the
hemispherical portion 11L. A resonance circuit is formed by the bass housing 6L and the tubular
duct 9L with respect to the bass speaker unit 8L to operate as a Kelton-type speaker.
[0085]
The bass electroacoustic transducer 3L does not block the auricle 101 of the listener, so the
eardrum 103L of the listener does not block the sound generated around the listener (hereinafter
referred to as the ambient sound). As well as being able to reach and listen to it, the low
frequency of the reproduced sound can be made to reach the ear canal entrance 102L directly
from the hole 9AL of the tubular duct 9L so that the listener can hear a sufficient level of low
frequency.
[0086]
Incidentally, the inner diameter of the tubular duct 9L is, for example, 1.8 mm, and the distance
from the surface of the baffle plate 4AL to the hole 8AL of the tubular duct 9L is, for example,
about 35 mm. Absent.
[0087]
Here, since the tubular duct 9L is provided with the hole 9AL at the center of the U-shaped
portion, it is substantially the same as constituting two ducts by the upper and lower halves, The
inner diameter and the effective length are determined in consideration of the inner diameter
(corresponding to about 2.5 [mm] in this case) when the duct 9L is converted into one tubular
duct.
[0088]
That is, by forming the tubular duct 9L in a U-shaped side, the effective length can be set shorter
as compared to the case of one tubular duct, and the design and safety can be greatly improved.
It is done.
[0089]
As described above, in the ear speaker device 200, when the speaker unit 7 is attached to the
10-05-2019
19
head 100 of the listener, the middle to high sound speaker unit 7L of the middle to high electric
sound conversion unit 2L is positioned slightly ahead of the ear canal entrance 102L of the
listener. The middle and high-pitched speaker unit 7L radiates medium- and high-pitched sound
of the reproduced sound, and the rear and middle-high-pitched speaker unit 53L of the rear and
middle-high-pitched electroacoustic transducer 50L is slightly away from the ear canal entrance
102L of the listener The hole in the tubular duct 9L which radiates medium to high sound of
reproduced sound from the rear middle to high pitch speaker unit 53L and extends from the
cover portion 12L of the bass electroacoustic transducer 3L to the vicinity of the external ear
canal inlet 102L. By emitting the bass of the reproduced sound from 9AL, it is possible to provide
a more natural and more three-dimensional sound image localization while achieving sufficient
levels of Good reproduced sound and a sound have been made so as to listen to the listener.
[0090]
(2-2) Configuration Example of Another Ear Speaker Device According to the Second
Embodiment The ear speaker device 200 according to the second embodiment is, as shown in
FIG. The middle-high-pitched electro-acoustic conversion unit 2L, the rear middle-high-pitched
electro-acoustic conversion unit 50L, and the bass electro-acoustic conversion unit 3L are
attached to the head 100 of the listener. By using various other mounting units, the middle to
high-pitched electroacoustic conversion unit 2L, the rear middle to high-pitched electroacoustic
conversion unit 50L, and the low-pitched electroacoustic conversion unit 3L may be attached to
the head 100 of the listener .
[0091]
In the following, as in the case of the above-described ear speaker device 200, mainly the leftside high-midtone electric-acoustic transducer 2L, the rear mid-high-tone electroacoustic
converter 50L, and the bass electroacoustic converter 3L are described as an example. However,
the middle-high-pitched electroacoustic transducer 2R (not shown) on the right, the rear middlehigh-pitched electroacoustic transducer 50R (not shown), and the bass electroacoustic transducer
3R (not shown) The left-right middle-high-tone electro-acoustic transducer 2L, the rear middlehigh-tone electro-acoustic transducer 50L, and the bass electro-acoustic transducer 3L are
configured to be laterally symmetrical.
[0092]
For example, as shown in FIG. 7 in which parts corresponding to those in FIG. 3 are assigned the
same reference numerals, the ear speaker device 220 (FIG. 7) in the second embodiment is
configured as a so-called In place of the band portion 204 in the device 200 (FIG. 6), the middlehigh-pitched electroacoustic transducer 2L, the rear middle-high-pitched electroacoustic
transducer 50L, and the bass-grade electroacoustic transducer 3L are held and the listener's
10-05-2019
20
auricle 101L A band portion 224 for hooking is used.
[0093]
The band portion 224 is formed in a substantially arch shape that protrudes downward, and is
assumed to be passed left and right under the listener's jaw, and is substantially L-shaped
extending forward from the middle of the band portion 224 The middle-high-pitched
electroacoustic transducer 2L is attached to the tip of the arm 24C, and the tip of the
substantially L-shaped arm 224D extended rearward from the middle of the band portion 224 is
provided with a back-midtone electroacoustic sound. The bass electroacoustic transducer 3L is
attached to the band portion 224 so that the converter 50L is attached and located slightly above
the front of the auricle 101L of the listener.
[0094]
The ear speaker device 220 (FIG. 7) is configured such that the middle to high-pitched
electroacoustic conversion unit 2L, the rear middle to high-pitched electroacoustic conversion
unit 50L, and the low-pitched sound by hooking the ear hooked portion 24BL of the band portion
224 to the auricle 101L of the listener. The electroacoustic transducer 3L can be mounted on the
head 100 of the listener, and as with the ear speaker device 200, good reproduced sound
including a sufficient level of bass while giving natural and even more three-dimensional sound
image localization The listener is made to be able to listen.
[0095]
Also in this case, in the ear speaker device 220 (FIG. 7), mainly the low frequency sound emitted
from the low frequency speaker unit 8L can reach the listener's ear canal entrance 102L directly
via the cover portion 12L and the tubular duct 9L. Therefore, it is made to be able to reduce a
sound leak of a bass rather than the case where it listens via a general stationary speaker.
[0096]
Furthermore, as shown in FIG. 8 in which parts corresponding to FIG. 4 are assigned the same
reference numerals, the ear speaker device 230 is configured as a so-called shoulder hold type,
and the band portion 204 in the ear speaker device 200 (FIG. 6) Instead, a shoulder arm 234 is
used which holds the middle to high-pitched electro-acoustic transducer 2L, the rear mid-highpitched electroacoustic transducer 50L, and the low-pitched electroacoustic transducer 3L and
supports them from the shoulder of the listener.
[0097]
10-05-2019
21
The shoulder arm 234 is attached at its tip to the bass electroacoustic transducer 3L, and has a
substantially L shape extending forward from the middle of a rod-like holding portion 34L
vertically provided from the shoulder of the listener. A middle L-tone electro-acoustic transducer
2L is attached to the tip of the arm 34C, and a substantially L-shaped arm 234D extended
backward from the middle of the holding part 34L at the tip of the rear mid-tone electro-acoustic
transducer 50L Have a mounted configuration.
In addition, the central portion 34A of the shoulder arm 234 is formed in a substantially arch
shape that is convex rearward, and is assumed to be hooked from the back of the neck of the
listener to the upper part of the shoulder and passed from side to side.
[0098]
The ear speaker device 230 (FIG. 8) is hooked over both shoulders of the listener by the middlehigh-pitched electric acoustic conversion unit 2L, the rear middle-high-pitched electric-acoustic
conversion unit 50L, and the bass electric-acoustic conversion unit 3L. And, like the ear speaker
device 200, the listener can listen to a good reproduced sound including a sufficient level of bass
while providing a natural and more three-dimensional sound image localization. It is done.
[0099]
Furthermore, as shown in FIG. 9 in which parts corresponding to FIG. 5 are assigned the same
reference numerals, the ear speaker device 240 is configured as a so-called neck band type, and
the band portion 204 in the ear speaker device 200 (FIG. 6) Instead, a band unit 244 is used to
hold the middle-high-pitched electro-acoustic conversion unit 2L, the rear middle-high-pitched
electro-acoustic conversion unit 50L, and the low-pitched electro-acoustic conversion unit 3L and
to hang it on the auricle 101L of the listener. .
[0100]
The central portion 44A of the band portion 244 is formed in a substantially arch shape that is
convex rearward, and is premised to be passed behind the back of the back 100 of the listener,
and is substantially extended from the middle of the band portion 244 to the front A middlehigh-pitched electroacoustic transducer 2L is attached to the tip of an L-shaped arm 44C, and a
tip of a substantially L-shaped arm 244D extended backward from the middle of the band
portion 244 The electro-acoustic transducer 50L is attached.
10-05-2019
22
[0101]
The ear speaker device 240 (FIG. 9) is configured such that the middle to high-pitched
electroacoustic conversion unit 2L, the rear middle to high-pitched electroacoustic conversion
unit 50L, and the low-pitched sound by the ear hook portion 44BL of the band portion 244 being
hooked on the auricle 101L of the listener. The electroacoustic transducer 3L can be mounted on
the head 100 of the listener, and as with the ear speaker device 200, good reproduced sound
including a sufficient level of bass while giving natural and even more three-dimensional sound
image localization The listener is made to be able to listen.
[0102]
As described above, according to the present invention, in addition to the band portion 204 (FIG.
6) of the ear speaker device 200, mounting portions formed by various methods used for the ear
speaker devices 220 to 240 (FIGS. 7 to 9) The middle to high-pitched electro-acoustic converter
2L, the rear to mid-high-pitched electro-acoustic converter 50L, and the low-pitched electroacoustic converter 3L may be attached to the head 100 of the listener.
[0103]
(2-3) Operation and Effect in Second Embodiment In the above configuration, the ear speaker
device 200 is mounted on the head 100 of the listener, and the ear speaker device 200 is used
for middle to high tones of the middle to high tone electro-acoustic transducer 2L. The middlehigh-pitched speaker unit 7L provided in the housing 5L is positioned forward from the ear canal
entrance 102L of the listener by a predetermined distance, and the rear-mid-tone case of the rear
middle-high-pitched electroacoustic transducer 50L. The rear middle high-pitched speaker unit
53L provided in the body 51L is positioned at a predetermined distance rearward from the
external ear canal entrance 102L of the listener, and for bass located slightly above the front of
the external ear canal entrance 102L of the listener In a state where the hole 9AL of the tubular
duct 9L of the electroacoustic transducer 3L is positioned in the vicinity of the ear canal entrance
102L, it is supplied from a predetermined amplifier. Output playback sound based on the audio
signal.
[0104]
As a result, in the ear speaker device 200, medium to high sound output from the medium to
high sound speaker unit 7L of the medium to high sound housing 5L located in front of the
listener's ear canal entrance 102L is reflected by the listener's cheek or auricle 101L. In addition
to reaching the eardrum 103L, the medium to high-pitched sound output from the rear middlehigh-tone speaker unit 53L of the rear middle-high-tone housing 51L behind the listener's ear
canal entrance 102L is reflected by the auricle 101L of the listener Since the listener can reach
103 L, the listener is made to listen to medium to high-pitched sound having a characteristic
10-05-2019
23
similar to the case of listening to the reproduced sound through a general speaker, and the sound
image is out-of-head in nature and It can give a more three-dimensional sense of stereotacticity.
[0105]
On the other hand, in the ear speaker device 200, since the bass outputted from the bass speaker
unit 8L of the bass housing 6L can directly reach the ear canal entrance 102L through the
tubular duct 9L, the listener's auricle 101L It is possible to listen to a sufficient level of bass
while keeping it closed without closing it.
[0106]
In addition, the ear speaker device 200 achieves sufficient bass to the ear canal entrance 102L of
the listener by bringing the hole 9AL of the tubular duct 9L, which is a bass radiation port, closer
to the ear canal entrance 102L instead of raising the volume of the bass reproduction. As
compared with the case where, for example, a large diameter speaker or a subwoofer is used to
reproduce the low frequency, it is possible to substantially eliminate the low frequency and
vibration leaking around.
[0107]
Therefore, for example, when the listener listens to the reproduced sound through the ear
speaker device 200 at midnight, etc., the user enjoys a good reproduced sound including
sufficient bass, with little concern for troubles in the vicinity or surroundings. be able to.
[0108]
Further, since the tubular duct 9L has a U-shaped tip and does not block the ear canal entrance
102L of the listener, it does not block the ambient sound generated around the listener together
with the reproduction sound. It can be made to reach 103 L and make it listen.
[0109]
In this way, in the ear speaker device 200, even when the listener needs to listen to the ambient
sound, for example, when walking or playing a sport, the ambient sound can be reliably heard in
addition to the good reproduction sound. it can.
[0110]
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24
In the ear speaker device 200, as in the conventional closed type headphones, the middle to high
sound housing portion 5L of the middle to high electric sound-to-acoustic transducer 2L, the rear
middle to high electric sound to acoustic transducer 50L, etc. Since it is not covered by the rear
middle high-pitched casing 51L, there is no discomfort such as a sense of blockage or stuffiness
that a listener wearing a closed type headphone feels.
Further, in the ear speaker device 200, since the sealed space is not formed, the change of the
resonance frequency in the ear canal which may occur when the sealed type headphone is used
is not generated, and the listener does not feel discomfort.
[0111]
Moreover, since the ear speaker device 200 allows the listener to listen to a low sound of a
sufficient volume level by bringing the hole 9AL of the tubular duct 9L, which is a low emission
port, close to the tympanic membrane 103L, the aperture of the low sound speaker unit 8L is not
There is no need to increase the size as necessary, and the size of the bass housing 6L can be
minimized.
As a result, in the ear speaker device 200, the overall size and weight can be suppressed to the
necessary minimum, so that the burden caused by the size and weight when the listener wears
the ear speaker device 200 can be minimized.
[0112]
Furthermore, in the ear speaker device 200, the central portion 4A of the band portion 204 is
disposed in the vicinity of the top of the head 100, and the middle-high-pitched electroacoustic
conversion unit 2L, the rear middle-high-pitched electric-acoustic conversion unit 50L, and the
bass electroacoustic conversion unit By distributing 3L in three directions, weight balance can be
optimally balanced by the middle-high-pitched sound electro-acoustic conversion unit 2L, the
rear middle-high-pitched sound electro-acoustic conversion unit 50L, and the low-pitched
electro-acoustic conversion unit 3L. Thus, the stability when wearing the head 100 can be further
improved, and the sense of wearing can be further improved.
[0113]
According to the above configuration, when the ear speaker device 200 is mounted on the head
100 of the listener, the middle to high sound speaker unit 7L of the middle to high electric sound
10-05-2019
25
conversion unit 2L is slightly forward of the ear canal entrance 102L of the listener. And the
speaker unit 53L for the rear middle-high-pitched speaker unit 53L of the rear middle-highpitched electroacoustic transducer 50L at a predetermined distance behind the ear canal
entrance 102L of the listener, and By outputting the reproduced sound in a state where the hole
9AL of the tubular duct 9L of the bass electroacoustic transducer 3L is positioned in the vicinity
of the ear canal entrance 102L, it is natural and one-dimensional while giving stability at the time
of wearing Sound localization, and the listener can listen to high-quality reproduced sound.
[0114]
(3) Other Embodiments In the above-described first and second embodiments, the tubular duct
9L of the bass electroacoustic transducer 3L is formed as a double U-shaped double-sided
structure. However, the present invention is not limited to this, and the tubular duct 9L may be
configured by one or three or more tubular ducts.
[0115]
For example, as shown in FIG. 10, in the bass electroacoustic transducer 3L, one tubular duct 58L
may be extended downward from the bass housing 6L, and the tip of the tubular duct 58L may
be further extended. A protection unit 59L may be attached to the unit so as not to damage the
listener's ear canal entrance 102L.
In this case, the protection portion 59L can be made to listen to the listener without blocking the
ambient sound by being formed of a sponge-like member or the like that easily allows sound.
[0116]
In the first and second embodiments, the tubular duct 9L formed of a hard material such as metal
is used. However, the present invention is not limited to this, and a resin having flexibility is used.
Alternatively, a tubular duct 9L formed of a soft material such as, may be used.
[0117]
Furthermore, in the first and second embodiments, the case where the tubular duct 9L is
provided so as to penetrate the end of the surface of the cover 12L of the bass housing 6L has
been described, but the present invention is not limited thereto. Not limited to the above, the
tubular duct 9L may be provided so as to penetrate the other portion of the surface of the cover
12L.
10-05-2019
26
[0118]
Furthermore, in the first and second embodiments, when the ear speaker device 1 and the ear
speaker device 200 are attached to the head 100 (FIGS. 1 and 6) of the listener, the inside of the
middle to high-tone housing 5L is Although the case where the sound emitting surface of the
high sound speaker unit 7L is directed substantially in the rear direction has been described, the
present invention is not limited to this, for example, the sound emitting surface of the middle
high sound speaker unit 7L may be slightly inward. The point is that the sound emitting surface
of the middle to high sound speaker unit 7L is directed approximately in the direction of the ear
canal entrance 102L, and the medium to high sound to be radiated may efficiently reach the ear
canal entrance 102L.
[0119]
Furthermore, in the second embodiment, when the ear speaker device 200 is attached to the
head 100 (FIG. 6) of the listener, the sound emission surface of the rear middle high sound
speaker unit 53L of the rear middle high sound housing 51L. However, the present invention is
not limited thereto. For example, the sound emitting surface of the rear middle high-tone speaker
unit 51L may be slightly inward, and the point is that the rear side is important. It is only
necessary that the sound emitting surface of the middle to high-pitched speaker unit 51L be
directed approximately to the direction of the ear canal entrance 102L of the ear floor 101, and
the medium to high pitched sound be efficiently reached to the ear canal entrance 102L.
[0120]
Furthermore, in the first embodiment, the ear speaker device 1 has the middle-high-pitched
electroacoustic conversion unit 2L and the low-pitched electroacoustic conversion unit 3L only
on the left side of the listener Although the case has been described in which the playback sound
of 2.2 channels is output on the left and right by having the conversion unit 2R (not shown) and
the bass electroacoustic conversion unit 3R (not shown), the present invention For example, the
left and right bass electroacoustic transducer 2L and the bass electroacoustic transducer 3L may
be provided to output the 1.1 channel reproduced sound.
[0121]
Furthermore, in the second embodiment, the ear speaker device 200 has the middle-high-tone
electroacoustic transducer 2L, the rear middle-high-tone electroacoustic transducer 50L, and the
bass electroacoustic transducer 3L only on the left side of the listener, The right side of the
listener also has the middle-high-pitched electro-acoustic transducer 2R (not shown), the rear
middle-high-tone electro-acoustic transducer 50R (not shown), and the bass-grade electro-
10-05-2019
27
acoustic transducer 3R (not shown) Although the case where the reproduction sound of 4.2
channels was output on the left and right sides was described, the present invention is not
limited to this, for example, the middle-high-tone electroacoustic converter 2L on the left side,
the rear-midtone electric-acoustic transducer 50L It is also possible to have only the bass
electroacoustic transducer 3L and to output the reproduction sound of the 2.1 channel.
[0122]
Furthermore, in the first and second embodiments, the middle to high-pitched speaker unit 7L is
provided in the middle to high-pitched housing 5L, and the rear low-pitched speaker unit 53L is
provided to the rear middle-high-pitched housing 51L. Although the case has been described, the
present invention is not limited to this, and for example, two speaker units for medium sound and
high sound may be provided in one middle high and low case housing 5L and rear middle and
high sound case 51L for two ways For example, a plurality of speaker units may be provided in
the middle to high-tone housing 5L and the rear middle-high-tone housing 51L, such as speakers.
[0123]
Furthermore, in the first and second embodiments, the case where the middle and high sound
housing portion 5L and the rear middle and high sound housing portion 51L, which are shaped
such that the sphere is divided into two in the vertical direction, is used. As mentioned above, the
present invention is not limited to this, and may have various shapes such as a cube or a column,
for example, having a substantially enclosed space inside which can function as a speaker
enclosure. It should be good.
[0124]
Furthermore, in the first and second embodiments, the case where the cover portion 12L in
which the edge is left at the end portions of the inner end portions 9BL1 and 9BL2 of the tubular
duct 9L (FIG. 2) is described. However, the present invention is not limited to this, and the cover
12L may be used in which the rounded end is formed at the end of the inner end 9BL1 or 9BL2
of the tubular duct 9L.
In this case, in the cover portion 12L, the air pushed out from the front surface of the bass
speaker unit 8L does not hit the edge to generate wind noise, and only the bass without noise is
radiated from the hole portion 9AL of the tubular duct 9L. can do.
10-05-2019
28
[0125]
Furthermore, in the first and second embodiments, the duct length from the hole 9AL to the
inner end 9BL1 (FIG. 2) and the length from the hole 9AL to the inner end 9BL2 (FIG. 2) are the
same. Although the case where the set tubular duct 9L is used is described, the present invention
is not limited to this, and tubular ducts set to duct lengths different in length may be used.
[0126]
For example, in the bass case 6L provided with tubular ducts having different lengths from the
hole 9AL to the inner end 9BL1 and from the hole 9AL to the inner end 9BL2, two ducts having
different lengths Due to the phase shift of the resonance characteristics with each other, as a
result, the mid-high frequency component slightly output from the hole 9AL also cancels each
other out, and the bass sound in which the middle high noise is canceled from the hole 9AL of
the tubular duct It is made to be able to radiate only.
[0127]
Furthermore, in the first and second embodiments, the case where the hemispherical cover
portion 12L is used is described, but the present invention is not limited to this, and for example,
the shape is a quadrangular pyramid, a triangular pyramid, etc. The point is that the low-pitched
sound output from the low-pitched speaker unit 8L is collected and the structure does not leak
outside.
[0128]
Furthermore, in the first and second embodiments, the case has been described where the bass
casing 6L provided with the hemispherical portion 11L having a structure in which the rear of
the bass speaker unit 8L is closed is used. The present invention is not limited to this, and as
shown in FIG. 11, the through holes 305 to 308 are formed in the rear of the low frequency
speaker unit 8L, and the sponge holes etc. block the through holes 305 to 308 from the inside.
The bass housing portion 303L having the hemispherical portion 311L to which the acoustic
resistor 309 is attached may be used.
[0129]
In this case, the diaphragm of the bass speaker unit 8L follows the audio signal because the rear
side of the bass speaker unit 8L is opened by the through holes 305 to 308 in the bass housing
portion 303L (FIG. 11). Since the acoustic resistor 309 can prevent deterioration of the sound
quality due to the formation of the through holes 305 to 308, it is possible to radiate high-quality
low sound from the hole 9AL of the tubular duct 9L.
10-05-2019
29
[0130]
Incidentally, in the bass housing portion 303L (FIG. 11), the acoustic resistor 309 is not
necessarily required, and the acoustic resistor 309 is attached if necessary, and the length and
thickness thereof are changed. It is possible to adjust the sound quality by attaching it.
[0131]
Furthermore, in the first and second embodiments, the case has been described where the bass
casing 6L provided with the hemispherical portion 11L having a structure in which the rear of
the bass speaker unit 8L is closed is used. The present invention is not limited to this, and as
shown in FIG. 12, through holes 405 to 407 are formed in the cover portion 410L in front of the
low frequency speaker unit 8L, and the through holes 405 to 407 are closed from the inside. It is
also possible to use the bass housing 411L to which the sound resistors 408 and 409 made of a
sponge or the like are attached.
[0132]
In this case, the diaphragm of the bass speaker unit 8L follows the audio signal when the front
side of the bass speaker unit 8L is opened by the through holes 405 to 407 in the bass housing
411L (FIG. 12). Since the sound resistors 408 and 409 can prevent deterioration of the sound
quality due to the formation of the through holes 405 to 407, it is possible to radiate high-quality
sound from the hole 9AL of the tubular duct 9L. it can.
[0133]
Incidentally, the acoustic resistors 408 and 409 are not necessarily required also in the bass
housing 411L (FIG. 12), and the acoustic resistors 408 and 409 are attached if necessary, and
the length and thickness thereof It is possible to adjust the sound quality by attaching a modified
version of.
[0134]
Furthermore, in the first and second embodiments, the case has been described where the bass
housing 6L provided with the tubular duct 9L on the surface of the cover 12L is used, but the
present invention is not limited to this. As shown in FIG. 13, the bass casing 511L in which the
tubular duct 9L is provided for the baffle plate 13L of the hemispherical portion 11L may be
used.
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[0135]
In this case, the bass housing 511L (FIG. 13) can radiate only the bass of the predetermined
frequency band generated behind the bass speaker unit 8L through the hole 9AL of the tubular
duct 9L.
[0136]
Furthermore, in the first and second embodiments, the case has been described where the bass
housing 6L provided with the tubular duct 9L on the surface of the cover 12L is used, but the
present invention is not limited to this. As shown in FIG. 14, a bass housing portion 521L in
which a tubular duct 509L is integrally provided on the surface of the hemispherical portion
522L may be used.
[0137]
Also in this case, the bass housing portion 521L (FIG. 14) has the same structure as a so-called
Kelton-type speaker device, and only the bass of a predetermined frequency band from the rear
of the bass speaker unit 8L is a tubular duct It can be emitted through the hole 509AL of 509L.
[0138]
Furthermore, in the first and second embodiments, the case where the tubular duct 9L is
integrally attached to the bass housing 6L has been described, but the present invention is not
limited thereto. As shown in FIG. 15, the tubular duct 529L is engaged with the cover portion
528L by mutually fitting the fitting portion 525LBS formed in the cover portion 528L and the
holding portion 529LS formed in one of the tubular ducts 529L. The bass casing 531L having a
removable configuration may be used.
[0139]
As a result, in the bass housing 531L, the tubular duct 529L is used only when it is necessary for
the listener, and the tubular duct 529L is used when it is not necessary for the listener.
Therefore, the usability of the listener can be greatly improved.
[0140]
Furthermore, in the first and second embodiments, the bass housing portion 6 (FIG. 2) in which
the edge is left inside the cover portion 12L and at the inner end portions 9BL1 and 9BL2 of the
tubular duct 9L. Although the case where it is used is described, the present invention is not
limited to this, and as shown in FIG. 16, at the root portion of the tubular duct 569L integrally
provided with the cover portion 558L, inside the cover portion 558L. The bass casing 551L in
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which the round portion 570 is formed may be used.
[0141]
In the bass housing 551L, the air pushed out from the front side of the bass speaker unit 8L does
not hit the edge to generate a wind noise, and only the high-quality bass is the hole 569AL of the
tubular duct 569L. Can be emitted from
[0142]
Furthermore, in the first and second embodiments, although the case where the bass
electroacoustic transducer 3L is disposed above the front side of the auricle 101 has been
described, the present invention is not limited to this, and FIG. As shown, the bass electroacoustic
transducer 700 may be attached to the central portion 4A of the band 4 in a hemispherical
shape.
[0143]
In this case, in the ear speaker device 800 (FIG. 17), the bass according to the bass component of
the audio signal can be emitted from the bass-use electroacoustic converter 700 disposed at the
top of the head 100 of the listener. It is possible to realize a 4.1 ch headphone by the middle to
high-pitched electric acoustic converting units 2L and 2R, the rear middle to high-pitched electric
and acoustic converting units 50L and 50R, and the low-pitched electric and acoustic conversion
unit 700.
[0144]
Furthermore, in the first and second embodiments, the case has been described where the bass
casing 6L formed in a state in which the tubular duct 9L is integrated with the surface of the
cover 12L is used. The present invention is not limited to this, and the tubular duct formed in a
thin tubular shape as it goes to the tip has a shape that wraps the front side of the bass speaker
unit 8L without distinguishing between the cover portion 12L and the tubular duct 9L. You may
make it use the housing | casing part for basses of the structure attached to the board 13L.
[0145]
Furthermore, in the first and second embodiments, the medium-to-high-tone electroacoustic
transducers 2L and 50L as the first housing unit, the medium-to-high-tone speaker unit 7L as the
mid-to-high-sound speaker unit, and the rear mid-to-high-tone A speaker unit 53L, a band unit 4
or 204 as a mounting unit, a bass electroacoustic transducer 3L as a second housing unit, and a
bass speaker unit 8L as a bass speaker unit as an ear speaker device Although the case where the
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ear speaker devices 1 and 200 are configured has been described, the present invention is not
limited to this, and other various configurations such as a first housing unit, a speaker unit for
medium and high noise, and a mounting unit The ear speaker device may be configured by the
second housing portion and the bass speaker unit.
[0146]
The present invention can be used for an ear speaker device in which a speaker device having
various ducts in addition to the Kelton type speaker is mounted on the head of the listener.
[0147]
It is an approximate line side view showing composition of an ear speaker device (2.2ch) in a 1st
embodiment.
FIG. 2 is a schematic cross-sectional view showing a bass electroacoustic transducer in the first
embodiment.
It is a rough-line side view which shows the example (1) of a structure of the ear speaker
apparatus in 1st Embodiment, and mounting | wearing.
It is an approximate line side view showing an example (2) of composition and wear of an ear
speaker device in a 1st embodiment.
It is an approximate line side view showing example (3) of composition and wearing of an ear
speaker device in a 1st embodiment.
It is an approximate line side view showing composition of an ear speaker device (4.2ch) in a 2nd
embodiment.
It is a rough-line side view which shows the example (1) of a structure of the ear speaker
apparatus in 2nd Embodiment, and mounting | wearing.
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It is a schematic line side view showing an example (2) of composition and wear of an ear
speaker device in a 2nd embodiment.
It is a rough-line side view which shows the example (3) of a structure of the ear speaker
apparatus in 2nd Embodiment, and mounting | wearing.
It is a basic diagram which shows the structural example of the tubular duct in other
embodiment.
It is a general | schematic line sectional drawing which shows the structure (1) of the housing |
casing part for basses in other embodiment.
It is a general | schematic line sectional view which shows the structure (2) of the housing |
casing part for basses in other embodiment.
It is a general | schematic line sectional drawing which shows the structure (3) of the housing |
casing part for basses in other embodiment.
It is a general | schematic line sectional drawing which shows the structure (4) of the housing |
casing part for basses in other embodiment.
It is a general | schematic line sectional drawing which shows the structure (5) of the housing |
casing part for basses in other embodiment.
It is a general | schematic line sectional drawing which shows the structure (6) of the housing |
casing part for basses in other embodiment.
FIG. 18 is a schematic side view showing a configuration of an ear speaker device (4.1 ch)
according to another embodiment.
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Explanation of sign
[0148]
1, 20, 30, 40, 200, 220, 230, 240, 800 ...... Ear speaker device, 2L, 2R ...... Electroacoustic
transducing unit for middle and high sound, 3L ...... Electroacoustic transforming unit for bass,
50L ...... Rearward Electroacoustic transducers for medium and high tones, 4, 24, 44, 204, 224,
244 ... Band parts, 5L ... Enclosures for medium and high tones, 6L ... Enclosures for medium and
high tones, 7L ... for medium and high tones Speaker unit, 8 L: bass speaker unit, 9 L: tubular
duct, 9 AL: hole, 11 L: hemispherical portion, 12 L: cover portion, 13 L: baffle plate, 51 L: rear
middle high noise case Body part, 53 L: Rear middle and high frequency speaker unit 100, head:
101 L: Auricle, 102 L: Ear canal entrance, 103 L: Eardrum.
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