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JP2008182481

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DESCRIPTION JP2008182481
The present invention provides a low-cost speaker device which is provided with a plurality of
speakers different in sound range and can flexibly cope with the use situation of audio. A speaker
device has a tweeter (second speaker) 2 attached to an attachment shaft (attachment portion) 6
provided coaxially with the woofer 1 in front of the woofer (first speaker) 1. The first diffuser 3
diffuses the sound of the second sound, and the second diffuser 4 diffuses the sound from the
second speaker in a detachable manner. The movable shaft portion 62 of the mounting shaft 6 is
refracted with the hinge portion 61 as a fulcrum, and the tweeter 2 can be inclined. The speaker
device functions as a coaxial nondirectional speaker by mounting the second diffuser 4 with the
direction of the second speaker aligned with the first speaker, and removing the second diffuser
4 to specify the second speaker in a specific direction By pointing to it, it functions as a
directional speaker that emits sound in a specific direction. [Selected figure] Figure 2
Speaker device
[0001]
The present invention relates to a speaker device provided with a plurality of speakers having
different sound ranges, and more particularly to a nondirectional speaker device provided with a
plurality of speakers coaxially.
[0002]
Conventionally, in the field of sound, directional speakers that emit sound waves in a specific
direction are widely used, while non-directional speakers that generate non-directional sound
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1
waves by diffusing the generated sound waves are also put to practical use. It is done.
The omnidirectional speaker has a wide listening range of sound, three-dimensionally indicates
the localization of the sound, and can give a listener a sense of presence.
[0003]
Patent Document 1 discloses an example of a nondirectional speaker device. The speaker device
disclosed in Patent Document 1 is provided coaxially with a speaker for high frequency band and
a speaker for high frequency band at the opening of the upright cylindrical casing so that sound
waves can be output evenly to the periphery of the speaker device Is configured. Since the lowrange speaker and the high-range speaker are coaxially arranged, the localization of the sound
becomes clear as compared with the speaker device in which the low-range speaker and the
high-range speaker are disposed in a dispersed manner. It has the advantage of UnexaminedJapanese-Patent No. 5-56493
[0004]
An omnidirectional speaker can flow homogeneous voice over a wide range, and therefore is
suitable for applications where the same voice such as background music (BGM) or an
announcement is streamed uniformly over a wide range. On the other hand, high-quality audio
within a narrow range, such as sending individual announcements in a specific place, or letting
the viewer located in front of the monitor hear the audio when watching a video using the
monitor A directional speaker that emits sound waves in a specific direction is suitable for
streaming applications. As described above, there are situations where the non-directional
speaker is more suitable and the situation where the directional speaker is more suitable
depending on the use situation of the voice, so it is desirable to use different speakers depending
on the situation. However, preparing both types of speakers so as to be able to flexibly cope with
the use situation of voice has a problem that the cost increases. Especially for individual users,
there is a problem that the financial burden is heavy and a large space is required for the
speaker.
[0005]
The present invention has been made in view of such circumstances, and the object of the
present invention is to be flexible in the use situation of voice by being able to be used as a
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2
directional speaker or a nondirectional speaker. And providing a low cost speaker device that can
cope with the
[0006]
Another object of the present invention is to provide a speaker device coaxially provided with a
plurality of speakers, which can suppress deterioration of sound due to vibration transmitted
between the speakers.
[0007]
A speaker device according to the present invention is a speaker device including a plurality of
speakers having different sound ranges, wherein a first speaker, a second speaker having a
different sound range from the first speaker, and the second speaker in front of the first speaker
And a mounting portion attached, wherein the second speaker is configured to be able to change
its direction.
[0008]
In the present invention, the second speaker is disposed in front of the first speaker to constitute
a speaker apparatus, and the direction of the second speaker can be changed.
By tilting the second speaker at an arbitrary angle, the second speaker can be oriented in a
specific direction.
[0009]
The speaker device according to the present invention is disposed between the first speaker and
the second speaker, and a first diffuser that diffuses the sound wave from the first speaker, and a
direction of the second speaker is the first A second diffuser is detachably provided at a position
facing the second speaker when it is determined in the same direction as the speaker, and further
includes a second diffuser for diffusing the sound wave from the second speaker.
[0010]
In the present invention, a first diffuser for diffusing the sound from the first speaker is provided
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between the first speaker and the second speaker, and the sound from the second speaker
directed in the same direction as the first speaker is further provided. And a second diffuser for
diffusing the light.
In the state where the direction of the second speaker is set to the same direction as the first
speaker and the second diffuser is mounted, the sound from the first speaker and the second
speaker is diffused.
With the second diffuser removed and the second speaker directed in a specific direction, the
sound from the second speaker is emitted in a specific direction.
[0011]
In the speaker device according to the present invention, the mounting portion has a fixed shaft
portion coaxially with the first speaker and extending forward from the center of the first
speaker, and the first diffuser is mounted on the fixed shaft portion. It is characterized in that it is
provided in a state of being penetrated without contact.
[0012]
Further, in the present invention, the fixed shaft portion of the mounting portion to which the
second speaker is attached is provided in a non-contact state with the first diffuser, so that the
first speaker and the mounting portion are connected from the first speaker. Vibration
transmitted to the second speaker is reduced.
[0013]
In the speaker device according to the present invention, the mounting portion is provided with a
hinge portion provided at one end of the fixed shaft portion and the second speaker at one end,
and the other end is fixed shaft via the hinge portion And a movable shaft portion which is
coupled to the portion and can be refracted with the hinge portion as a fulcrum.
[0014]
In the present invention, the mounting portion includes the hinge portion and the movable shaft
portion connected to the fixed shaft portion via the hinge portion, and the movable shaft portion
to which the second speaker is attached is fixed to the fixed shaft portion with the hinge portion
as a fulcrum. It is possible to refract and tilt the second speaker with respect to the axial
direction.
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[0015]
In the speaker device according to the present invention, the mounting portion has a ball joint
provided at one end of the fixed shaft portion, and the second speaker attached at one end, and
the other end has the fixed shaft via the ball joint. And a movable shaft portion which is
connected to the portion and swingable with the ball joint as a fulcrum.
[0016]
In the present invention, the mounting portion includes the ball joint and the movable shaft
portion connected to the fixed shaft portion via the ball joint, and the movable shaft portion to
which the second speaker is attached is directed in any direction with the ball joint as a fulcrum
It is possible to swing and direct the second speaker in any direction.
[0017]
The speaker device according to the present invention is characterized in that the second speaker
is a speaker that emits a higher sound range than the first speaker.
[0018]
Furthermore, in the present invention, the sound emitted by the second speaker is a high-pitched
sound than the first speaker, and has high directivity.
[0019]
In the present invention, the speaker device functions as a coaxial nondirectional speaker by
setting the direction of the second speaker to be the same as the direction of the first speaker
and mounting the second diffuser, and the second diffuser By detaching and directing the second
speaker in a specific direction, it functions as a directional speaker that emits sound in a specific
direction.
That is, it becomes possible to execute the optimal voice usage according to the usage of voices,
and prepare both types of speakers, non-directional speakers and directional speakers, so as to
flexibly respond to the usage of voices. Since it is not necessary to save the sound, it is possible to
realize a low-cost speaker device which can flexibly cope with the use situation of audio.
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In particular, for an individual user, the financial burden on the speaker device that can flexibly
cope with the use situation of voice can be reduced, and the space required for the speaker
device can be reduced.
[0020]
Further, in the present invention, since the mounting portion is not in contact with the first
diffuser, the vibration transmitted from the first speaker to the second speaker via the first
diffuser and the mounting portion is reduced, and the second speaker is vibrated. It is possible to
suppress the deterioration of the sound quality due to the disturbance of the sound from the.
[0021]
Further, according to the present invention, by providing the hinge portion in the mounting
portion to which the second speaker is attached, the second speaker can be inclined at an
arbitrary inclination with respect to the axial direction, and sound in a specific direction can be
obtained. It is possible to easily realize the function of a directional speaker that emits
[0022]
Further, in the present invention, by providing the ball joint in the mounting portion for attaching
the second speaker, the second speaker can be oriented in any direction without moving the
speaker device itself, and the user It can be easily adjusted to emit voice in the desired direction
of
[0023]
Furthermore, in the present invention, by directing the second speaker emitting highly
directional high-pitched sound in a specific direction, the speaker device is a directional speaker
having good directivity of sound in a specific direction. The present invention has excellent
effects, such as being able to function.
[0024]
The present invention will be specifically described below based on the drawings showing the
embodiments thereof.
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FIG. 1 is a schematic perspective view showing an overview of the speaker device of the present
invention.
The speaker device includes a housing 5, a woofer (first speaker) 1 that is a speaker that emits
sound in the middle to mid range, a tweeter (second speaker) 2 that is a speaker that emits audio
in the high range, and sound waves from the woofer 1 And a second diffuser 4 for diffusing the
sound wave from the tweeter 2 and a stand 51.
Note that the second speaker may be any speaker that emits high-pitched sound than the first
speaker, and the first speaker is a subwoofer for super bass, the second speaker is a mid-tone
scoker, and so on. The first and second speakers may be configured in combination.
[0025]
The housing 5 is made of wood, metal such as aluminum, translucent resin, glass or the like, and
has a hollow cylindrical shape.
In the present embodiment, although the case 5 is described as having a cylindrical shape having
a substantially circular cross section, the present invention is not limited to this and may have an
elliptical shape in a cross sectional view.
Furthermore, the shape is not limited to the cylindrical shape, and may be a hollow triangular
prism or a hollow polygonal prism.
On the lower side of the housing 5, a plurality of stands 51, 51, 51 are fixed to the outer
peripheral surface of the housing 5 with screws or an adhesive.
The housing 5 is installed by the stands 51, 51, 51 so that the longitudinal direction is vertical.
[0026]
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The woofer 1 is placed at the upper opening of the housing 5, and a part of the first diffuser 3,
the tweeter 2 and the second diffuser 4 are coaxially mounted on the woofer 1 coaxially along
the longitudinal direction of the housing 5. 5. It protrudes from the upper opening.
The first diffuser 3 has, for example, a substantially funnel shape, and includes a support shaft
31 and a diffusion plate 32.
As described later, one end (tip end) of the support shaft 31 is fixed to the yoke of the woofer 1
and is erected, and the other end of the support shaft 31 is connected to the diffusion plate 32.
The diffusion plate 32 has a circular plan view and a substantially inverted triangle in a side
view, and diffuses the sound wave from the diaphragm 11 of the woofer 1 in the direction
intersecting the axial direction of the support shaft 31.
[0027]
The support shaft 31 is a hollow cylinder, and an attachment shaft (attachment portion) 6 to
which the tweeter 2 is attached at one end is provided penetrating the inside of the support shaft
31.
The other end of the mounting shaft 6 is fixed to the yoke of the woofer 1. The tweeter 2 is
supported by the mounting shaft 6 with the sound wave output surface facing upward. On the
upper side of the tweeter 2, a second diffuser 4 having substantially the same shape as the first
diffuser 3 is provided. The second diffuser 4 is configured to include connection rods 41, 41. One
end of the connecting rod 41 is detachably attached to the outer periphery of the diffusion plate
32 of the first diffuser 3, and the other end is fixed to the outer periphery of the diffusion plate
42. Note that the second diffuser 4 can be removed by releasing the connection between the
connecting rod 41 and the outer periphery of the diffusion plate 32. The diffusion plate 42 is
formed in a circular shape in plan view and a substantially inverted triangle in side view provided
on the upper side of the tweeter 2 and diffuses the sound wave from the tweeter 2 in a direction
intersecting the axial direction of the mounting shaft 6.
[0028]
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FIG. 2 is a schematic partial longitudinal sectional view showing the longitudinal section of the
speaker device of the present invention, FIG. 3 is a perspective sectional view showing the
longitudinal section of the speaker device of the present invention, and FIG. It is a disassembled
perspective cross-sectional view which shows the longitudinal cross-section of. The woofer 1
includes a yoke 12, a magnet 13, a top blade 14, a frame 15, a coil bobbin 16, a damper 17, an
edge 18, and a diaphragm 11. The yoke 12 in a bottom view annular shape provided at the
bottom of the woofer 1 is formed in a flange shape, and is formed in a cylindrical shape with a
bottom plate 121 positioned at the bottom of the woofer 1 and protrudes upward from the
central portion of the bottom plate 121 And a center pole 122. Through-holes in the vertical
direction including the central axis are formed in the flange-shaped bottom plate 121 and the
cylindrical center pole 122, and a screw groove 123 is formed on the inner surface of the
through-hole. The through hole and the screw groove 123 are formed in such a size that the
mounting shaft 6 can be fixed, as described later.
[0029]
On the bottom plate 121, a doughnut-shaped magnet 13, a top blade 14, a frame 15, and a
damper 17 are placed. The coil bobbin 16 is provided on the outer peripheral surface of the
center pole 122 and is wound around the outer periphery of the center pole 122 by a voice coil
(not shown). The center pole 122 penetrates the concentrically arranged magnet 13 and the top
blade 14 along with the coil bobbin 16 along the outer periphery, and the coil bobbin 16
penetrates the frame 15 and the damper 17 along the outer periphery.
[0030]
The upper side of the coil bobbin 16 is connected to the diaphragm 11, and the coil bobbin 16
and the diaphragm 11 form a substantially funnel shape having a Y-shaped cross section. The
diaphragm 11 has a V-shaped cross-sectional view V in which the radius in plan view increases
as it extends upward, and an annular edge 18 having a semicircular cross-sectional view is
provided around the outer periphery of which the radius is maximum. An annular holding plate
151 having a rectangular shape in cross section is further provided around the outer periphery
of the edge 18. An annular step portion 52 having an L-shaped cross section is circumferentially
provided on the outer peripheral surface of the upper opening of the cylindrical case 5, and the
holding plate 151 of the woofer 1 is mounted on the step portion 52.
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[0031]
The first diffuser 3 is configured to include a support shaft 31 and a diffusion plate 32. The
support shaft 31 has a cylindrical shape, and a screw portion 34 is provided at a lower end of the
support shaft 31 so as to protrude, and the central portion is a through hole in the vertical
direction including the central axis. A screw thread for screwing with the screw groove 123 of
the center pole 122 is formed on the outer peripheral surface of the screw portion 34. The radius
of the outer periphery of the screw portion 34 is made to be substantially the same as the inner
peripheral surface radius of the center pole 122 so as to be screwed into the screw groove 123
which is the inner peripheral surface of the center pole 122 of the yoke 12. The radius of the
outer peripheral surface of the support shaft 31 is formed larger than the radius of the inner
peripheral surface of the center pole 122 in order to end the screwing of the screw portion 34
into the screw groove 123 at an appropriate position. That is, the radius decreases in the order of
the outer peripheral surface radius of the support shaft 31, the inner peripheral surface radius of
the center pole 122, and the outer peripheral surface radius of the screw portion 34.
[0032]
When the first diffuser 3 is fixed to the yoke 12 of the woofer 1, the support shaft 31 is inserted
from the upper side of the woofer 1 toward the through hole of the center pole 122, and the
screw portion 34 is screwed into the thread groove 123 of the center pole 122. Do. When the
screwing progresses, the head of the center pole 122 abuts on the bottom surface of the support
shaft 31 whose radius is increased, and the fixing of the first diffuser 3 is completed. In the
present embodiment, the mounting method using the screw portion 34 and the screw groove
123 has been described as an example. However, the present invention is not limited to this, and
fixing may be performed using an adhesive or the like. A hook may be provided, and instead of
the screw groove 123, a hole may be provided to fix the both by locking the hook in the hole.
[0033]
An opening at the other upper end of the cylindrical support shaft 31 is connected to the
diffusion plate 32, and the support shaft 31 and the diffusion plate 32 form a substantially
funnel shape having a Y-shaped cross section. The diffuser plate 32 has a V-shaped crosssectional view in which the radius in plan view increases as it extends upward, and an annular
edge 36 is provided around the outer periphery of which the radius is maximum. A connection
recess 35 for supporting the connection rod 41 is provided at an appropriate position (four in
03-05-2019
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the present embodiment) of the edge 36 with the opening facing upward.
[0034]
The mounting shaft 6 is connected to the fixed shaft portion 63 formed in a cylindrical shape
having substantially the same diameter, a hinge portion 61 provided at one end of the upper side
of the fixed shaft portion 63, and the hinge portion 61. The movable shaft portion 62 and the
support portion 64 provided at the lower end of the fixed shaft portion 63 are configured. The
movable shaft portion 62 is a portion to which the tweeter 2 is attached, and a tip end screw
portion 621 for screwing the tweeter 2 is formed at one end. The hinge portion 61 is a
mechanism connecting the other end of the movable shaft portion 62 to the end of the fixed
shaft portion 63 so that the movable shaft portion 62 can be refracted with respect to the fixed
shaft portion 63. The movable shaft portion 62 is a hinge portion It can be refracted with 61 as a
fulcrum. The hinge portion 61 is configured to give friction to a connection portion between the
movable shaft portion 62 and the fixed shaft portion 63, and can hold the angle of the movable
shaft portion 62 with respect to the fixed shaft portion 63 at an arbitrary angle. . The hinge 61
may be provided with an angle holding mechanism such as a fixing screw for fixing the angle of
the movable shaft 62 with respect to the fixed shaft 63 at an arbitrary angle.
[0035]
The support portion 64 is a portion fixed to the yoke 12 of the woofer 1 to support the mounting
shaft 6 and is formed in a cylindrical shape having a diameter larger than that of the fixed shaft
portion 63. A screw portion 643 for screwing with 123 is formed. The inner diameter of the
center pole 122 and the outer diameter of the threaded portion 643 have substantially the same
diameter so that the threaded portion 643 can be screwed into the threaded groove 123. Further,
the support portion 64 includes a flat washer 642 and a head 641 whose diameter is larger than
the inner diameter of the center pole 122.
[0036]
The radius of the mounting shaft 6 is configured to decrease in the order of the support portion
64, the fixed shaft portion 63, and the distal end screw portion 621. Further, as for the length in
the longitudinal direction of the screw portion 643, the sum of the length of the screw portion
643 and the length in the longitudinal direction of the screw portion 34 of the first diffuser 3 is
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the length of the screw groove 123 which is the inner peripheral surface of the center pole 122.
The length may be approximately equal to or less than the length of the direction. For example,
assuming that the length in the longitudinal direction of the screw groove 123 which is the inner
peripheral surface of the center pole 122 is 5 cm, the length in the longitudinal direction of the
screw portion 643 is 4 cm, and the longitudinal direction of the screw portion 34 of the first
diffuser 3 is The length should be 1 cm.
[0037]
The fixed shaft portion 63 extends forward from the center of the woofer 1 coaxially with the
woofer 1 in a state where the mounting shaft 6 is fixed to the yoke 12, and the screw groove 123
of the yoke 12 and the support shaft 31 of the first diffuser 3 They are penetrated so as not to
contact the inner surface. Therefore, the radius of the fixed shaft portion 63 is set smaller than
the inner peripheral radius of the center pole 122 and the inner peripheral radius of the support
shaft 31. Thereby, the influence of the vibration by the support shaft 31 of the first diffuser 3 on
the mounting shaft 6 and the tweeter 2 is reduced. The length of the fixed shaft portion 63 in the
longitudinal direction is determined by using the hinge portion 61 as a fulcrum as described later
when the screw portion 643 is completely screwed into the screw groove 123 and the tweeter 2
is attached to the movable shaft portion 62. It may be set so that the tweeter 2 does not contact
the first diffuser 3 even when the tweeter 2 is inclined. Further, in the present embodiment, the
support shaft 31 of the first diffuser 3 is cylindrical, but the present invention is not limited to
this. Other shapes may be used as long as they do not contact the mounting shaft 6. For example,
a hollow polygonal cylinder may be used.
[0038]
The tweeter 2 is configured to include a yoke 21 and a screw groove 22. A thread groove 22 is
formed on the inner peripheral surface of the central portion of the doughnut-shaped yoke 21
provided on the bottom surface of the tweeter 2. The radius of the screw groove 22 is set to be
substantially the same as the radius of the distal end screw portion 621 in order to enable
screwing with the distal end screw portion 621 formed at the distal end of the movable shaft
portion 62 of the mounting shaft 6. By bending the movable shaft portion 62 of the mounting
shaft 6 with the hinge portion 61 as a fulcrum, the tweeter 2 can be tilted with respect to the
shaft of the speaker device.
[0039]
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12
A procedure for attaching the mounting shaft 6 and the tweeter 2 after screwing the first diffuser
3 to the woofer 1 will be described. The flat shaft 642 is inserted into the through hole of the
center pole 122 from the lower side of the yoke 12 and the mounting shaft 6 is inserted. The
movable shaft portion 62 and the fixed shaft portion 63 penetrate without screwing with the
screw groove 123, and further penetrate through the center of the support shaft 31 of the first
diffuser 3 so as not to be in contact when screwing is completed. As the screw portion 643 and
the screw groove 123 engage with each other according to the insertion of the mounting shaft 6
and the head 641 is rotated, the screwing progresses in the upward direction. The screwing
progresses, and the screwing is completed when the head 641 abuts on the yoke 12 via the flat
washer 642. In this state, the support portion 64 of the mounting shaft 6 contacts and penetrates
the center pole 122 of the yoke 12, and the fixed shaft portion 63 penetrates without contacting
the support shaft 31 of the first diffuser 3, and the movable shaft portion 62 projects from the
tip opening of the support shaft 31. The distal end screw portion 621 formed on the movable
shaft portion 62 is screwed into the screw groove 22 of the tweeter 2, and the tweeter 2 is
attached to the mounting shaft 6.
[0040]
The second diffuser 4 includes a diffusion plate 42, a connecting rod 41 and an edge 43. The
second diffuser 4 has a bowl shape, and an annular edge 43 is provided around the outer
periphery of the diffusion plate 42. Connecting rods 41 are vertically provided at appropriate
positions (four in the present embodiment) of the edge 43. The tip of the connecting rod 41 is
inserted into a connecting recess 35 provided on the edge 36 of the first diffuser 3. Thereby, the
attachment to the 1st diffuser 3 of the 2nd diffuser 4 is completed. The second diffuser 4 can be
removed from the speaker device by pulling out the connecting rod 41 from the connecting
recess 35.
[0041]
The woofer 1, the first diffuser 3, the mounting shaft 6, the tweeter 2, and the second diffuser 4
integrated by the above procedure are inserted from the upper opening of the housing 5 with the
yoke 12 of the woofer 1 facing downward, and the holding plate By placing 151 on the step
portion 52, the speaker device of the present invention as shown in FIG. 1 is completed. A gel or
the like for absorbing vibration may be inserted between the holding plate 151 and the step 52.
03-05-2019
13
[0042]
In the speaker device of the present invention shown in FIG. 1, the tweeter 2 is directed upward,
and the second diffuser 4 is disposed in front of the tweeter 2. When the speaker device is
operated in this state, the sound wave emitted by the woofer 1 is diffused in the horizontal
direction by the first diffuser 3, the sound wave emitted by the tweeter 2 is diffused in the
horizontal direction by the second diffuser 4, and the speaker device is It functions as a coaxial
nondirectional speaker. At this time, since the mounting shaft 6 is not in contact with the first
diffuser 3, the vibration transmitted from the woofer 1 to the tweeter 2 via the first diffuser 3
and the mounting shaft 6 is reduced, and the sound from the tweeter 2 is transmitted by the
vibration. It is possible to suppress the deterioration of the sound quality due to being disturbed.
[0043]
FIG. 5 is a schematic perspective view showing a speaker apparatus in which the second diffuser
4 is removed and the tweeter 2 is inclined, and FIG. 6 is a schematic view showing a longitudinal
section of the speaker apparatus in which the second diffuser 4 is removed and the tweeter 2 is
inclined. Fig. 7 is a partial longitudinal sectional view, and Fig. 7 is a perspective sectional view
showing a longitudinal section of the speaker device in which the second diffuser 4 is removed
and the tweeter 2 is inclined. As described above, the second diffuser 4 can be removed from the
speaker device, and the tweeter 2 is a speaker device by bending the movable shaft portion 62 of
the mounting shaft 6 to which the tweeter 2 is attached with the hinge portion 61 as a fulcrum. It
is possible to turn in an inclined direction at an arbitrary angle with respect to the axial direction
of.
[0044]
The tweeter 2 can be made to face a specific direction such as the position of the listener by
tilting the tweeter 2 to an arbitrary angle with the hinge portion 61 as a fulcrum and adjusting
the position of the speaker around the axis. When the speaker device is operated in this state, the
tweeter 2 functions as a directional speaker that emits sound in a specific direction. Since the
high-pitched sound emitted by the tweeter 2 is highly directional and the sound is not diffused by
the diffuser, the tweeter 2 functions as a directional speaker having good directivity. Also in this
state, although the woofer 1 functions as a nondirectional speaker, the mid to low range sound
emitted by the woofer 1 is inferior in directivity to the high range, and even if it is a directional
03-05-2019
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speaker, the low range directivity Since the sex is low, the speaker device can emit sound with
directivity substantially equal to that of the conventional directional speaker.
[0045]
As described above in detail, the speaker device according to the present invention functions as a
coaxial nondirectional speaker by mounting the second diffuser 4 with the tweeter 2 directed in
the same direction as the woofer 1, and the second diffuser 4 By dismounting and orienting the
tweeter 2 in a specific direction, it functions as a directional speaker that emits sound in a
specific direction. That is, the speaker device of the present invention is used as a nondirectional
speaker in applications where sound is uniformly flowed in a wide range, such as when playing
BGM, and when allowing a viewer to hear sound when watching a video, etc. It can be used as a
directional speaker in applications where high quality voices flow in a narrow range. As
described above, since the speaker device of the present invention can be used as a
nondirectional speaker or a directional speaker, it is possible to execute an optimal voice usage
method according to the usage of voice. Since it is not necessary to prepare both types of
speakers so as to flexibly cope with the use situation of audio, it is possible to flexibly cope with
the use situation of audio and to realize a low cost speaker device. In particular, for individual
users, the financial burden for flexibly dealing with the use of voice can be reduced, and the
space required for the speaker device can be reduced. Furthermore, since the functions of the
nondirectional speaker and the directional speaker can be realized by one speaker device, the use
efficiency of the speaker device is improved as compared to the case where both types of
speakers are prepared and used.
[0046]
In the present embodiment, although the tweeter 2 can be inclined by providing the hinge
portion 61 on the mounting shaft 6, the present invention is not limited to this, and the speaker
device of the present invention has other configurations. The tweeter 2 may be inclined. For
example, the speaker device may have a form in which the hinge portion 61 is provided with a
mechanism capable of rotating around the axis of the fixed shaft portion 63. In this case, it is
possible to more easily turn the tweeter 2 in a specific direction.
[0047]
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In the speaker device of the present invention, the mounting shaft 6 may be a ball joint instead of
the hinge portion 61, and the movable shaft portion 62 may be connected to the end of the fixed
shaft portion 63 via the ball joint. FIG. 8 is a schematic partial longitudinal cross-sectional view
showing a cross-sectional structure of a part of the speaker device of the present invention in
which the attachment shaft is provided with a ball joint. A ball joint 65 is provided at an end of
the fixed shaft portion 63 of the mounting shaft 6, and the movable shaft portion 62 is connected
to the fixed shaft portion 63 via the ball joint 65. The ball joint 65 includes a ball portion 651
integrally connected to an end opposite to the tip screw portion 621 of the movable shaft portion
62, a resin bearing 652 for wrapping the ball portion 651, and a housing 653 containing the
bearing 652 And the vicinity of the opening of the housing 653 open to the movable shaft 62
side is caulked to the axial core side. The bearing 652 may be formed of grease, rubber or the
like. The movable shaft portion 62 can swing in any direction with the ball joint 65 as a fulcrum.
The bearing 652 is configured to provide friction between the ball portion 651 and the housing
653 so that the angle of the movable shaft portion 62 with respect to the fixed shaft portion 63
can be maintained at an arbitrary angle.
[0048]
In the speaker device of the present invention including the configuration shown in FIG. 8, the
movable shaft 62 can be refracted in any direction at any angle with the ball joint 65 as a
fulcrum, and the tweeter 2 attached to the movable shaft 62 It is possible to turn the direction of
any direction. Therefore, it is possible to turn the tweeter 2 in any direction without moving the
speaker device itself, and to realize the speaker device which can be easily adjusted to emit sound
in the direction desired by the user. it can.
[0049]
It is a schematic perspective view which shows the outline | summary of the speaker apparatus
of this invention. It is a typical fragmentary longitudinal cross-sectional view which shows the
longitudinal cross-section of the speaker apparatus of this invention. It is a perspective sectional
view showing a longitudinal section of a speaker device of the present invention. It is a
disassembled perspective cross-sectional view which shows the longitudinal cross-section of the
components which comprise a speaker apparatus. It is a schematic perspective view which shows
the speaker apparatus which removed the 2nd diffuser and inclined the tweeter. It is a typical
fragmentary longitudinal cross-sectional view which shows the longitudinal cross-section of the
speaker apparatus which removed the 2nd diffuser and inclined the tweeter. It is a perspective
view showing the longitudinal section of the speaker apparatus which removed the 2nd diffuser
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and inclined the tweeter. It is a typical fragmentary longitudinal cross-sectional view which
shows the cross-section of a part of speaker apparatus of this invention which the attachment
axis provided the ball joint.
Explanation of sign
[0050]
Reference Signs List 1 woofer (first speaker) 11 diaphragm 12 yoke 121 bottom plate 122 center
pole 123 thread groove 14 top blade 15 frame 2 frame tweeter (second speaker) 3 first diffuser
31 support shaft 32 diffusion plate 34 screw portion 35 connection recess 4 Second diffuser 41
Connecting rod 42 Diffusion plate 5 Housing 6 Mounting shaft (mounting portion) 61 Hinge
portion 62 Movable shaft portion 63 Fixed shaft portion 64 Support portion 65 Ball joint
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