close

Вход

Забыли?

вход по аккаунту

?

JP2008104057

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2008104057
An object of the present invention is to make it possible to reproduce sound of higher quality in a
speaker device having an elongated shape. A speaker device (100) includes a diaphragm (8)
having a shape relatively long in a reference direction as viewed from the sound propagation
direction, and (i) is formed on the entire outer peripheral portion of the diaphragm. (Ii) convex
edge (9a) of the cross section of the convex shape in the direction of propagation, (iii) a portion
along the reference direction in the outer peripheral portion of the diaphragm, (iv) in the
direction of propagation And a concave edge (9b) having a concave cross section. [Selected
figure] Figure 3
Speaker device
[0001]
The present invention relates to the technical field of a speaker device having a diaphragm of, for
example, an elongated shape or a rectangular shape.
[0002]
Recently, for example, in an image reproducing apparatus such as a large plasma television, an
elongated speaker device is widely used.
In general, (i) the degree to which a vibration system such as a voice coil or the like collides with,
for example, a magnetic circuit, and (ii) the size of the interval of the magnetic gap between the
12-05-2019
1
cylindrical pole portion of the yoke and the plate There is a trade-off relationship. The magnetic
gap is preferably relatively small in order to generate a larger driving force.
[0003]
However, the elongated diaphragm is more likely to sway compared to the square or circular
shaped speaker device due to its elongated shape, and is swayed in the vibration system as
shown in FIG. Exercise is likely to be triggered. The state in which such a rolling motion occurs is
called rolling. In this case, the voice coil collides with the magnetic circuit, and there is a
technical problem that the abnormal sound may be generated or the speaker device may be
broken due to the collision. In particular, when the diaphragm vibrates with a large amplitude
and the rolling occurs, if the holding force of the support system is weak, the bobbin is inclined
and the voice coil contacts the magnetic circuit itself. This contact is a major cause of abnormal
noise and voice coil breakage.
[0004]
As a method of solving such a problem, Patent Document 1 and the like disclose a method of
making the shapes of some edges different.
[0005]
JP-A-8-102992
[0006]
However, in Patent Document 1 and the like described above, when the speaker device is driven,
that is, when the diaphragm moves in the front direction of the speaker device, the air present in
the space surrounded by the convex edge and the concave edge is closed. It flows out of the
space into the open space.
In substantially the same manner, when the diaphragm moves in the rearward direction of the
speaker device, it flows out of the closed space into the open space in substantially the same
manner.
12-05-2019
2
Therefore, during vibration of the diaphragm, outflow or inflow of air existing in the space
surrounded by the convex edge and the concave edge occurs, and the frictional noise due to the
flow of air is radiated in the front direction of the speaker device As a result, there is a technical
problem that this frictional noise is emitted toward the listener.
[0007]
The present invention has been made in view of the above-mentioned problems, and an object of
the present invention is to provide a speaker device capable of reproducing sound of higher
quality in a speaker device having an elongated shape.
[0008]
In order to solve the above-mentioned subject, a speaker device according to claim 1 is a speaker
device provided with a diaphragm which has a shape relatively long in a reference direction
(horizontal or vertical direction) when viewed from the propagation direction of sound. (I) formed
on the entire outer peripheral portion of the diaphragm and (ii) a convex edge having a cross
section which is convex toward the propagation direction, and (iii) in the outer peripheral portion
of the diaphragm And a concave edge formed at least in part along the reference direction, and
(iv) having a cross section which is concave toward the propagation direction.
[0009]
The operation and other advantages of the present invention will be apparent from the
embodiments described below.
[0010]
Hereinafter, a speaker device according to an embodiment of the present invention as a best
mode for carrying out the invention will be described.
[0011]
(Embodiment of Speaker Device) The embodiment according to the speaker device of the present
invention is a speaker device provided with a diaphragm having a shape that is relatively long in
a reference direction (horizontal or vertical direction) when viewed from the sound propagation
direction. (I) formed on the entire outer peripheral portion of the diaphragm and (ii) a convex
edge having a cross section which is convex toward the propagation direction, and (iii) in the
outer peripheral portion of the diaphragm And a concave edge formed at least in part along the
reference direction, and (iv) having a cross section which is concave toward the propagation
direction.
12-05-2019
3
[0012]
According to the embodiment of the speaker device of the present invention, the diaphragm is
provided with a shape that is relatively long in the reference direction (horizontal or vertical
direction).
Specifically, the shape of the diaphragm may be an elongated shape in which a projected shape is
an ellipse, an ellipse, or a combination of circles having different curvatures when viewed from
the sound propagation direction.
[0013]
In particular, in the present embodiment, (i) a convex edge which is formed on the entire outer
peripheral portion of the diaphragm and (ii) has a cross section which becomes convex in the
sound propagation direction, and (iii) the diaphragm And a concave edge at least partially formed
along the reference direction and having a cross section which is concave toward the
propagation direction.
Therefore, based on the stiffness of the edge of the double structure configured by the convex
edge and the concave edge formed along the reference direction, for example, as viewed from the
propagation direction when the diaphragm of the speaker device is driven. Effectively preventing
the two ends in the reference direction, such as the left or right part, from rolling or becoming
unbalanced, and the vibration direction of the diaphragm largely deviates from the propagation
direction, It is possible to effectively prevent tilting.
Therefore, it is possible to effectively prevent the voice coil located at the central portion of the
diaphragm from colliding with the magnetic circuit provided between, for example, the pole yoke
and the plate during driving.
As a result, it is possible to effectively prevent the occurrence of rolling, and to effectively
prevent the occurrence of abnormal sound and the breakage of the speaker device due to the
collision between the vibration system and the magnetic circuit.
12-05-2019
4
In particular, the concave edge is not formed on the entire outer peripheral portion of the
diaphragm, but is formed on a part thereof, thereby supporting the physical characteristics of the
vibration system including the diaphragm and the support including the damper and the edge in
the speaker device. Depending on the physical properties of the system, it is possible to keep the
lowest resonance frequency of the loudspeaker device determined at a low level. As a result, in
the speaker device, it is possible to reproduce high-pitched sound in high quality.
[0014]
In addition, the convex edge is formed on the entire periphery of the diaphragm. On the other
hand, the concave edge is formed in part of the outer peripheral portion of the diaphragm. Thus,
the convex edge and the portion where the concave edge is formed form a closed space capable
of air flow confinement. On the other hand, the convex edge and the portion where the concave
edge is not formed form an open space through which air can flow out.
[0015]
If the convex edge is formed on a part of the outer peripheral portion of the diaphragm and the
concave edge is formed on the entire outer peripheral portion of the diaphragm, the convex edge
is not formed by the portion where the convex edge is not formed and the concave edge An open
space is formed which allows air to flow out. Therefore, this open space opens in the propagation
direction based on the shape of the concave edge. Therefore, air flows out from the closed space
to the open space in the propagation direction (in other words, in the front direction of the
speaker device). Therefore, the frictional noise due to the air flowing into the open space is
emitted in the front direction of the speaker device, and the frictional noise is emitted toward the
listener.
[0016]
On the other hand, according to the present embodiment, as described above, the convex edge
and the portion where the concave edge is formed form a closed space in which the flow of air
can be confined. On the other hand, the convex edge and the portion where the concave edge is
not formed form an open space through which air can flow out. Therefore, it is possible to open
12-05-2019
5
this open space in the direction opposite to the propagation direction based on the shape of the
convex edge. Therefore, it is possible to allow air to flow out of the closed space into the open
space in the direction opposite to the direction of propagation (in other words, in the back
direction of the loudspeaker system). As a result, frictional noise caused by air flowing out from
the closed space formed based on the convex edge and the concave edge to the open space
formed based on the convex edge is emitted toward the front side of the speaker device. It is
possible to prevent almost or completely.
[0017]
As a result of the above, in the speaker apparatus having a shape relatively long in a reference
direction such as, for example, a horizontal direction or a vertical direction when viewed from the
sound propagation direction, high-quality sound effectively preventing the generation of
abnormal noise and frictional noise described above. It is possible to realize the reproduction of
[0018]
In one aspect of the embodiment according to the speaker device of the present invention, (i) a
closed space is formed by the convex edge and the portion where the concave edge is formed,
and (ii) the convex edge; An open space is formed by the portion where the concave edge is not
formed.
[0019]
According to this aspect, it is possible to open the opening space in the direction opposite to the
propagation direction based on the shape of the convex edge.
Therefore, it is possible to allow air to flow out of the closed space into the open space in the
direction opposite to the direction of propagation (in other words, in the back direction of the
loudspeaker system).
As a result, frictional noise caused by air flowing out from the closed space formed based on the
convex edge and the concave edge to the open space formed based on the convex edge is emitted
toward the front side of the speaker device. It is possible to prevent almost or completely.
[0020]
12-05-2019
6
In another aspect of the embodiment according to the speaker device of the present invention,
the plurality of concave edges are arranged in line symmetry or point symmetry when viewed
from the propagation direction.
[0021]
According to this aspect, the speaker is based on the stiffness of the edge of the dual structure
configured by the convex edge and the plurality of concave edges arranged in line symmetry or
point symmetry as viewed from the propagation direction. When driving the diaphragm of the
device, it is more effective that two ends in the reference direction, for example, the left or right
part seen from the propagation direction, roll or become unbalanced. It is possible to prevent the
vibration direction of the diaphragm from being greatly separated from the propagation direction
and to be inclined more effectively.
As a result, it is possible to more effectively prevent the occurrence of rolling and to more
effectively prevent the occurrence of abnormal sound and the breakage of the speaker device
due to the collision between the vibration system and the magnetic circuit.
[0022]
In another aspect of the embodiment according to the speaker device of the present invention,
the cross-sectional shape of the convex edge and the cross-sectional shape of the concave edge
are substantially line symmetrical with respect to a plane orthogonal to the propagation
direction.
[0023]
According to this aspect, for example, at the time of driving the diaphragm of the speaker device,
based on the stiffness of the edge of the double structure configured by the convex edge and the
concave edge whose cross-sectional shape is substantially line symmetric. It is more effectively
prevented that the two ends in the reference direction, such as the left or right part when viewed
from the propagation direction, roll and become unbalanced, and the vibration direction of the
diaphragm is It is possible to more effectively prevent a large deviation from the propagation
direction and tilting.
12-05-2019
7
As a result, it is possible to more effectively prevent the occurrence of rolling and to more
effectively prevent the occurrence of abnormal sound and the breakage of the speaker device
due to the collision between the vibration system and the magnetic circuit.
[0024]
In another aspect of the embodiment according to the speaker device of the present invention,
the concave edge causes air present in a closed space formed by the convex edge and the
concave edge to flow out in a direction opposite to the propagation direction. Have holes for.
[0025]
According to this aspect, it is possible to cause air to flow out of the closed space and in the
reverse direction of the propagation direction (in other words, the backward direction of the
speaker device) through the hole.
As a result, it is possible to disperse the outflow of frictional noise due to air flowing out of the
closed space formed based on the convex edge and the concave edge, and to further reduce the
noise level of the frictional noise.
[0026]
As a result of the above, in the speaker device having a shape relatively long in the reference
direction such as horizontal or vertical direction, for example, from the sound propagation
direction, high-quality sound reproduction is realized with the noise level of frictional noise
further reduced. It is possible.
[0027]
In another aspect of the embodiment according to the speaker device of the present invention,
the speaker device further includes a frame for supporting the diaphragm, and the convex edge is
formed in a band shape along an outer peripheral portion of the diaphragm. The end is adhered
to the outer peripheral portion of the diaphragm, the outer end of the convex edge is adhered to
the frame, and the concave edge is formed in a band shape along a part of the outer peripheral
portion of the diaphragm The inner end of the concave edge is bonded to a part of the outer
periphery of the diaphragm, and the outer end of the concave edge is bonded to a part of the
frame.
12-05-2019
8
[0028]
According to this aspect, the convex edge is formed in a band shape along the outer peripheral
portion of the diaphragm.
Specifically, the inner end of the convex edge is bonded to the outer peripheral portion of the
diaphragm, and the outer end of the convex edge is bonded to the frame.
On the other hand, the concave edge is formed in a band shape along a part of the outer
periphery of the diaphragm. Specifically, the inner end of the concave edge is bonded to a part of
the outer peripheral part of the diaphragm, and the outer end of the concave edge is bonded to a
part of the frame.
[0029]
Therefore, (i) convex edges bonded to the entire periphery of the diaphragm and the entire
periphery of the frame, and (ii) a concave bonded to a portion of the diaphragm and a portion of
the frame along the reference direction. Based on the stiffness of the edge of the double structure
constituted by the edges, two ends in the reference direction, for example the left or right part
when viewed from the propagation direction, when driving the diaphragm of the speaker device
However, it is more effective to prevent the sideways swinging or becoming an unbalanced state
more effectively, and to more effectively prevent the vibration direction of the diaphragm from
becoming far from the propagation direction and tilting. Is possible. As a result, it is possible to
effectively prevent the occurrence of rolling, and to more effectively prevent the occurrence of
abnormal sound and the breakage of the speaker device due to the collision between the
vibration system and the magnetic circuit.
[0030]
In the aspect according to the above-described frame, the frame is configured to have a step
having a depth substantially equal to the thickness of the outer end of the recessed edge at the
bonding portion where the frame and the recessed edge are bonded. It is also good.
[0031]
12-05-2019
9
According to this structure, when bonding the convex edge and the concave edge to the frame, it
is possible to seal the space formed by the convex edge, the concave edge, and the frame.
[0032]
Generally, in the speaker device assembling process, temporarily, the convex edge is bonded to a
part of the diaphragm and a part of the frame, and the concave edge is bonded to the entire
periphery of the diaphragm and the entire periphery of the frame In the latter case, it is possible
to bond the convex edge while sealing the space constituted by the convex edge, the concave
edge, and the frame in the second half of the assembly process of the speaker device.
However, if the concave edge is adhered to a part of the diaphragm and a part of the frame and
the convex edge is adhered to the entire circumference of the diaphragm and the entire
circumference of the frame as in the present embodiment, provisionally If the frame does not
have a step having a depth substantially equal to the thickness of the outer edge of the concave
edge, the convex edge is separated from the frame by the thickness of the outer edge of the
concave edge, and the convex edge and the frame And a gap is generated in the space formed by
the convex edge, the concave edge, and the frame.
[0033]
On the other hand, according to the present embodiment, the frame has a step having a depth
substantially equal to the thickness of the outer end portion of the recessed edge at the bonding
portion where the frame and the recessed edge are bonded. The outer end of the speaker is
completely accommodated in the step in the first half of the assembly process of the speaker
device.
Therefore, the convex edge bonded in the latter half of the assembly process of the speaker
device is not separated from the frame by the thickness of the outer end of the concave edge, and
a gap is generated between the convex edge and the frame. Absent. Therefore, it is possible to
seal the space constituted by the convex edge, the concave edge and the frame. As a result, it is
possible to prevent unintended air from flowing out from the space constituted by the convex
edge, the concave edge, and the frame, and it is possible to realize high-quality sound
reproduction in the speaker device.
12-05-2019
10
[0034]
In the aspect according to the above-described speaker device, (i) a thickness substantially equal
to the thickness of the outer end of the concave edge, and (ii) an outer end of the convex edge
and an outer end of the concave edge It may be configured to further include a spacer that can
be adhered to an opposing portion where the convex edge and the frame face each other except
for an adhered portion to be adhered.
[0035]
According to this structure, when bonding the convex edge and the concave edge to the frame, it
is possible to seal the space constituted by the convex edge, the concave edge, the frame and the
spacer.
[0036]
If there is no spacer having a thickness substantially equal to the thickness of the outer edge of
the concave edge, the convex edge is separated from the frame by the thickness of the outer edge
of the concave edge and the convex edge and the frame There is a gap between them, and a gap
is created in the space constituted by the convex edge, the concave edge, the frame and the
spacer.
[0037]
On the other hand, according to the present embodiment, the spacer is provided at the opposing
portion where the convex edge and the frame face each other except the bonding portion where
the outer end portion of the convex edge and the outer end portion of the concave edge are
bonded. Be glued.
Therefore, the convex edge to be bonded in the assembly process of the speaker device is not
separated from the frame by the thickness of the outer end of the concave edge, and no gap is
generated between the convex edge and the frame.
Therefore, it is possible to seal the space constituted by the convex edge, the concave edge, the
frame and the spacer.
12-05-2019
11
As a result, it is possible to prevent unintended air from flowing out from the space constituted
by the convex edge, the concave edge, the frame, and the spacer, and it is possible to realize highquality sound reproduction in the speaker device.
[0038]
In the above aspect of the speaker device, the spacer further includes a spacer which can be
installed between the outer end of the convex edge and the outer end of the concave edge, and
the spacer bonds the spacer to the concave edge. The bonding portion may have a step having a
depth substantially equal to the thickness of the outer end of the recessed edge.
[0039]
According to this structure, when bonding the convex edge and the concave edge to the spacer, it
is possible to seal the space formed by the convex edge, the concave edge, and the spacer.
[0040]
If the spacer does not have a step having a depth substantially equal to the thickness of the outer
edge of the concave edge, the convex edge is separated from the spacer by the thickness of the
outer edge of the concave edge, and A gap is generated between the spacer and the spacer, and a
gap is generated in the space formed by the convex edge, the concave edge, and the spacer.
[0041]
On the other hand, according to the present embodiment, the spacer has a step having a depth
substantially equal to the thickness of the outer end of the recessed edge at the bonding portion
where the spacer and the recessed edge are bonded.
Therefore, the convex edge bonded in the assembly process of the speaker device does not
separate from the spacer by the thickness of the outer end of the concave edge, and no gap is
generated between the convex edge and the spacer.
Therefore, it is possible to seal the space constituted by the convex edge, the concave edge, and
the spacer.
12-05-2019
12
As a result, it is possible to prevent unintended air from flowing out from the space constituted
by the convex edge, the concave edge, and the spacer, and it is possible to realize high-quality
sound reproduction in the speaker device.
[0042]
The spacer has a step having a depth substantially equal to the thickness of the outer end portion
of the convex edge at the bonding portion where the spacer and the convex edge are bonded, as
the concept of the opposite (pair) is considered. It is possible to receive almost the same effect.
[0043]
In the aspect according to the above-described speaker device, the convex edge is an adhesive
portion at which the convex edge and the concave edge are adhered excluding the adhesive
portion at which the outer end of the convex edge and the frame are adhered. A step may be
formed to have a depth substantially equal to the thickness of the outer end of the concave edge.
[0044]
According to this structure, when bonding the convex edge, the concave edge, and the frame, it is
possible to seal the space formed by the convex edge, the concave edge, and the frame.
[0045]
If the convex edge does not have a step having a depth substantially equal to the thickness of the
outer edge of the concave edge, the convex edge is separated from the frame by the thickness of
the outer edge of the concave edge, and the convex edge is A gap is generated between the frame
and the frame, and a gap is generated in the space formed by the convex edge, the concave edge,
and the frame.
[0046]
On the other hand, according to the present embodiment, the convex edge is at the bonding
portion at which the convex edge and the concave edge are bonded except for the bonding
portion at which the outer end of the convex edge and the frame are bonded. And a step having a
depth substantially equal to the thickness of the outer end of the concave edge.
Therefore, the outer end of the concave edge is completely accommodated in the step in the
12-05-2019
13
assembly process of the speaker device.
Therefore, (i) one bonding portion where the outer end of the convex edge and the frame are
bonded, and (ii) the outer end of the concave edge and the other bonding portion where the
frame is bonded are substantially the same. It can be configured to be planar.
Therefore, the convex edge bonded in the latter half of the assembly process of the speaker
device is not separated from the frame by the thickness of the outer end of the concave edge, and
a gap is generated between the convex edge and the frame. Absent.
Therefore, it is possible to seal the space constituted by the convex edge, the concave edge and
the frame. As a result, it is possible to prevent unintended air from flowing out from the space
constituted by the convex edge, the concave edge, and the frame, and it is possible to realize
high-quality sound reproduction in the speaker device.
[0047]
As a general opposite (paired) idea, the concave edge is a bonding portion where the concave
edge and the convex edge are bonded except the bonding portion where the outer end of the
concave edge and the frame are bonded. It is possible to achieve substantially the same effect by
having a step having a depth substantially equal to the thickness of the outer end of the convex
edge.
[0048]
In another aspect of the embodiment according to the speaker device of the present invention, (i)
one bonding portion to which the inner end portion of the convex edge and the diaphragm are
bonded, and (ii) the inner end portion of the concave edge The other bonding portion to which
the and the diaphragm are bonded sandwiches the outer peripheral portion of the diaphragm.
[0049]
According to this aspect, (i) one bonding step in which the inner end portion of the convex edge
and the diaphragm are bonded, and (ii) another bonding step in which the inner end portion of
the concave edge and the diaphragm are bonded And can be another separate step.
12-05-2019
14
As a result, the diaphragm assembly and the convex edge and the concave edge are integrally
bonded together through two different bonding steps, and the assembly process of the speaker
device is made more efficient with the so-called diaphragm assay as a unit. It is possible to realize
it simply and simply.
[0050]
In another aspect of the embodiment according to the speaker device of the present invention,
the width of the concave edge is larger than the width of the convex edge.
[0051]
According to this aspect, since the width of the concave edge is larger than the width of the
convex edge, it is possible to make the stiffness of the concave edge smaller than the stiffness of
the convex edge. It is possible to more effectively maintain the lowest resonance frequency of the
speaker device determined at a low level by the physical characteristics of
[0052]
In another aspect of the embodiment according to the speaker device of the present invention,
the concave edge has a ventilation portion having air permeability.
[0053]
According to this aspect, for example, air can be made to flow out of the closed space in the
reverse direction of the propagation direction (in other words, the backward direction of the
speaker device) via the ventilation part such as work cloth or non-woven fabric It is.
As a result, it is possible to disperse the outflow of frictional noise due to air flowing out of the
closed space formed based on the convex edge and the concave edge, and to further reduce the
noise level of the frictional noise.
[0054]
As a result of the above, in the speaker device having a shape relatively long in the reference
direction such as horizontal or vertical direction, for example, from the sound propagation
direction, high-quality sound reproduction is realized with the noise level of frictional noise
12-05-2019
15
further reduced. It is possible.
[0055]
These effects and other advantages of the present embodiment will be apparent from the
examples described below.
[0056]
As described above, according to the embodiment of the speaker device of the present invention,
it includes the diaphragm having a relatively long shape in the reference direction (horizontal or
vertical direction) when viewed from the sound propagation direction, (i ) A convex edge which is
formed on the entire outer peripheral portion of the diaphragm and (ii) has a cross section which
has a convex shape in the propagation direction, and (iii) a portion along the reference direction
in the outer peripheral portion of the diaphragm And (iv) a concave edge having a cross section
which is concave toward the propagation direction.
As a result, it is possible to effectively prevent the occurrence of rolling, and to effectively
prevent the occurrence of abnormal sound and the breakage of the speaker device due to the
collision between the vibration system and the magnetic circuit.
Furthermore, as a result, frictional noise is emitted toward the front of the speaker device due to
air flowing out from the closed space formed based on the convex edge and the concave edge to
the open space formed based on the convex edge. It is possible to prevent things almost or
completely.
As a result of the above, in the speaker apparatus having a shape relatively long in a reference
direction such as, for example, a horizontal direction or a vertical direction when viewed from the
sound propagation direction, high-quality sound effectively preventing the generation of
abnormal noise and frictional noise described above. It is possible to realize the reproduction of
[0057]
Hereinafter, preferred embodiments of the speaker device of the present invention will be
described with reference to the drawings.
12-05-2019
16
[0058]
(1) Basic Configuration First, with reference to FIG. 1 and FIG. 2, the basic configuration of the
embodiment according to the speaker device of the present invention will be described.
Here, FIG. 1 is a plan view (FIG. 1 (a)) of the speaker device 100 according to the embodiment of
the speaker device of the present invention, and a cross-sectional view at the time of cutting
along the XZ plane (FIG. 1 (b)). And FIG. 1C is a cross-sectional view in the case of cutting along
the YZ plane.
FIG. 2 is an enlarged cross-sectional view of the speaker device 100 according to the
embodiment of the speaker device of the present invention cut along the YZ plane.
In all the drawings in the present embodiment, the X-axis direction and the Y-axis direction can
be uniquely (definitionally) defined with reference to the Z-axis direction which is the sound
propagation direction.
[0059]
As shown in FIG. 1A, the external shape of the speaker device 100 according to the present
embodiment is, for example, a shape that is relatively long in a reference direction such as the Xaxis direction. Specifically, the shape of the speaker device 100 may be an elongated shape in
which a projected shape is an ellipse, an ellipse, or a combination of circles having different
curvatures when viewed from the sound propagation direction.
[0060]
More specifically, as shown in FIG. 1 (b), FIG. 1 (c) and FIG. 2, the speaker device 100 mainly
includes a magnetic circuit 70 including the yoke 1, the magnet 2 and the plate 3, and a voice
coil bobbin. 4, a vibration system member 71 including a voice coil 5, a damper 7, a diaphragm
8, a convex edge 9a, a concave edge 9b, and a center cap 10, and a frame 6. In the present
invention, the configuration and driving method of the speaker device and the shape, position,
12-05-2019
17
size and the like of the components for the speaker device are not limited to the configuration
and the like described below.
[0061]
First, the configuration of the magnetic circuit 70 will be described.
[0062]
The magnetic circuit 70 is configured as an external magnet type magnetic circuit.
The yoke 1 has a columnar pole portion 1a and a flange portion 1b extending outward from the
lower end portion of the outer peripheral wall of the pole portion 1a. The magnet 2 has an
annular shape and is mounted on the flange portion 1 b. The plate 3 has an annular shape and is
mounted on the magnet 2. The magnetic flux of the magnet 2 is concentrated in the air gap
(magnetic gap 11) formed between the outer peripheral wall of the pole portion 1a which is an
element of the yoke 1 and the inner peripheral wall of the plate 3.
[0063]
Next, the configuration of the vibration system member 71 will be described.
[0064]
The voice coil bobbin 4 has a cylindrical shape, and is provided at a position covering the vicinity
of the upper end portion of the outer peripheral wall of the pole portion 1 a which is an element
of the yoke 1.
[0065]
The voice coil 5 is formed of one wire, has positive and negative lead wires (not shown), and is
wound around the lower end of the outer peripheral wall of the voice coil bobbin 4.
The lead wire on the positive side is an input wiring of the L (or R) channel signal, and the lead
wire on the negative side is an input wiring of the ground (GND: ground) signal.
12-05-2019
18
Each positive and negative lead wire is connected to one end side of each tinsel wire 12, and the
other end side of each tinsel wire 12 is a terminal portion provided on the second step 6b of the
frame 6 described later. Connected to 13. In this case, a wire for forming a network may be
inserted between the terminal portion 13 and the output wire on the amplifier side. The terminal
portion 13 is also connected to the output wiring 14 on the amplifier side. As a result, signals
and power for one channel are input to the voice coil 5 from the amplifier side through the
terminal portion 13, the tinsel wires 12, and the plus and minus lead wires.
[0066]
The frame 6 has a substantially cup-like shape and a step-like cross-sectional shape, and has a
function of supporting various components constituting the speaker device 100. The frame 6 has
a first step 6a at its lower position, a second step 6b at its center position, and a third step 6c at
its upper position. The first step 6 a is mounted on the plate 3.
[0067]
The damper 7 has an annular shape and elastically supports the voice coil bobbin 4 and the like.
The inner peripheral edge portion of the damper 7 is attached in the vicinity of the upper end
portion of the outer peripheral wall of the voice coil bobbin 4, while the outer peripheral edge
portion of the damper 7 is attached on the second stepped portion 6 b of the frame 6.
[0068]
The diaphragm 8 has a cone shape and has a function of emitting an acoustic wave according to
an input signal. The inner peripheral edge portion of the diaphragm 8 is attached to the upper
end portion of the outer peripheral wall of the voice coil bobbin 4 and above the damper 7.
[0069]
The convex edge 9 a and the concave edge 9 b have an annular planar shape and an Ω-like
12-05-2019
19
cross-sectional shape, and absorb unnecessary vibration generated in the speaker device 100 and
elastically support the diaphragm 8 with the voice coil bobbin 4. Have. The inner edge (inner
peripheral edge) of the convex edge 9a and the concave edge 9b is attached to the outer
peripheral edge (outer peripheral edge) of the diaphragm 8, while the outer edge (outer surface
of the convex edge 9a and the outer edge of the concave edge 9b The peripheral portion is
mounted on the third step 6 c of the frame 6. The details of the convex edge 9a and the concave
edge 9b will be described later.
[0070]
The center cap 10 has a hemispherical shape and has a function of preventing dust, moisture,
and the like from intruding into the inside of the speaker device 100. The center cap 10 is
disposed at a position covering the upper surface side of the voice coil bobbin 4, and is attached
to the upper end portion of the outer peripheral wall of the voice coil bobbin 4.
[0071]
In the speaker device 100 having the above configuration, the electric signal output from the
output wiring 14 on the amplifier side is sent to the voice coil 5 through the terminal portion 13,
each tinsel wire 12, and the positive and negative lead wires of the voice coil 5. Supplied. As a
result, driving force is generated in the voice coil 5 in the magnetic gap 11, and the diaphragm 8
is vibrated in the direction of the central axis L 1 of the speaker device 100. Thus, the speaker
device 100 emits a sound wave in the direction of the arrow Y1.
[0072]
(2) Examination of Operation and Effect of the Embodiment Next, the operation and effect of the
embodiment will be examined with reference to FIGS. 3 to 5. Here, FIG. 3 is a schematic
perspective view (FIG. 3A) showing a conceptual configuration of the diaphragm, the convex
edge, and the concave edge provided in the speaker device according to the present embodiment,
and FIG. FIG. 3B is a cross-sectional view conceptually showing the vicinity of the outer
peripheral portion of the diaphragm where the concave edge is formed (FIG. 3B), and
conceptually showing the vicinity of the outer peripheral portion of the diaphragm where the
convex edge is formed. FIG. 3 (c) is a schematic cross-sectional view (FIG. 3 (c)), and FIG. 3 (d) is a
schematic view showing an opening portion.
12-05-2019
20
[0073]
FIG. 4 is a schematic perspective view (FIG. 4A) showing a conceptual configuration of a
diaphragm, a convex edge, and a concave edge provided in the speaker device according to the
comparative example; FIG. 4B is a sectional view conceptually showing the vicinity of the outer
peripheral portion of the formed diaphragm (FIG. 4B), and FIG. 4B is a sectional view
conceptually showing the vicinity of the outer peripheral portion of the diaphragm having the
concave edge formed It is the schematic diagram (FIG. 4 (d)) which showed FIG. 4 (c) and the
opening part typically.
[0074]
FIG. 5 is a conceptual diagram schematically showing the vibration position of the diaphragm
(FIG. 5A) and the physical model of the diaphragm as the physical operation principle of the
speaker device according to the present embodiment. FIG. 5 (b) is a conceptual view shown in
FIG.
[0075]
As shown in FIG. 3A, in the speaker device according to the present embodiment, for example,
the diaphragm 8 having a shape that is relatively long in a reference direction such as the X-axis
direction is provided.
Specifically, the shape of the diaphragm 8 may be an elongated shape in which a projected shape
is an ellipse, an ellipse, or a combination of circles having different curvatures when viewed from
the sound propagation direction.
[0076]
In particular, in the present embodiment, (i) a convex edge 9a having a cross section which is
convex toward the Z-axis direction (i.e., the front surface of the speaker device) which is the
sound propagation direction is the outer peripheral portion of the diaphragm 8. It is formed on
the whole of
12-05-2019
21
In addition, (ii) a concave edge 9 b having a cross section which is concave toward the Z-axis
direction, which is the propagation direction, is formed in a portion along the X-axis direction in
the outer peripheral portion of the diaphragm 8.
[0077]
Specifically, although the convex edge 9a and the concave edge 9b are configured to be
approximately symmetrical with respect to the front and rear surfaces of the speaker device, they
need not be completely symmetrical, and will be described later. Alternatively, as shown in FIG. 8,
the convex edge 9 a may have a generally convex shape, and the concave edge 9 b may have a
generally concave shape. The bonding portion between the diaphragm 8 and the convex edge 9a
may be different from the bonding portion between the diaphragm 8 and the concave edge 9b.
Further, the edge of the double structure constituted by the convex edge 9 a and the concave
edge 9 b is disposed at a position that is line symmetrical or point symmetrical with respect to
the major axis or the minor axis of the speaker device. Further, in the elongated type loudspeaker
shown in FIGS. 1 (a) and 3 (a), a specific example in which the edge of the double structure
constituted by the convex edge 9a and the concave edge 9b is provided in the long side portion.
However, they may be provided at corner portions, so-called R portions. In the edge of the double
structure constituted by the convex edge 9a and the concave edge 9b whose cross-sectional
shape is substantially line symmetrical, the part surrounded by the convex edge 9a and the
concave edge 9b is a substantially cylindrical space There is air in this space. This air has an
open space at both ends of the concave edge 9b as described later.
[0078]
Therefore, for example, when the diaphragm 8 of the speaker device is driven, propagation is
performed based on the stiffness of the edge of the double structure formed by the convex edge
9 a and the concave edge 9 b formed along the X-axis direction. The two ends in the X-axis
direction, such as the left or right part when viewed from the direction, are effectively prevented
from rolling or becoming unbalanced, and the vibration direction of the diaphragm 8 is It is
possible to effectively prevent a large distance from the Z-axis direction which is the propagation
direction, and tilting. Therefore, it is possible to effectively prevent the voice coil located at the
central portion of the diaphragm 8 from colliding with a magnetic circuit such as a pole yoke or a
plate at the time of driving.
[0079]
12-05-2019
22
As a result, it is possible to effectively prevent the occurrence of rolling, and to effectively
prevent the occurrence of abnormal sound and the breakage of the speaker device due to the
collision between the vibration system and the magnetic circuit. In detail, the physical
phenomenon of maintaining the lowest resonance frequency at a low level is the diaphragm 8
vibrating through the edge and the damper 7 with respect to the support system shown in FIG. 5
(a). Since the spring coefficient of the spring holding the vibration system (object) with respect to
the support system shown in FIG. 5 (b) is maintained at a small level corresponding to the
vibration system included, It can be regarded as equivalent to maintaining the resonant
frequency of vibration at a low level.
[0080]
Further, in detail, as shown in FIG. 2 described above, in general, there is a trade-off relationship
between the degree to which the voice coil 5 collides with the magnetic circuit and the size of the
interval of the magnetic gap 11. However, the magnetic gap 11 is preferably relatively small in
order to generate a larger driving force. On the other hand, as described above, in the speaker
device of the present embodiment, the stiffness of the edge of the double structure configured by
the convex edge 9 a and the concave edge 9 b formed along the X-axis direction is used. Based
on this, it is possible to effectively prevent the voice coil located at the central portion of the
diaphragm 8 from colliding with a magnetic circuit such as a pole yoke or a plate, for example.
Therefore, according to the present embodiment, since the magnetic gap can be reduced while
effectively preventing the occurrence of rolling and effectively preventing the collision between
the vibration system and the magnetic circuit, the driving force can be reduced. It is possible to
improve to a higher level more efficiently.
[0081]
In addition, the convex edge 9 a is formed on the entire outer peripheral portion of the
diaphragm 8. On the other hand, the concave edge 9 b is formed on a part of the outer peripheral
portion of the diaphragm 8. Therefore, as shown in FIG. 3D, the convex edge 9a and the portion
where the concave edge 9b is formed form a closed space capable of air flow confinement. On
the other hand, as shown in FIG. 3D, the convex edge 9a and the portion where the concave edge
9b is not formed form an open space through which air can flow out.
12-05-2019
23
[0082]
If, as shown in FIG. 4A, the convex edge 9a is formed on a part of the outer peripheral portion of
the diaphragm and the concave edge 9b is formed on the entire outer peripheral portion of the
diaphragm 8, as shown in FIG. As shown in FIG. 4 (d), an open space where air can flow out is
formed by the portion where the convex edge 9a is not formed and the concave edge 9b.
Therefore, this open space opens in the propagation direction based on the shape of the concave
edge 9b. Therefore, air flows out from the closed space to the open space in the propagation
direction (in other words, in the front direction of the speaker device). Therefore, the frictional
noise due to the air flowing into the open space is emitted in the front direction of the speaker
device, and the frictional noise is emitted toward the listener.
[0083]
On the other hand, according to the present embodiment, as shown in FIG. 3 described above, the
closed space in which the air flow can be confined is formed by the convex edge 9 a and the
portion where the concave edge 9 b is formed. It is formed. On the other hand, the convex edge
9a and the portion where the concave edge 9b is not formed form an open space through which
air can flow out. Therefore, it is possible to open this opening space in the reverse direction of
the propagation direction based on the shape of the convex edge 9a. Therefore, it is possible to
allow air to flow out of the closed space into the open space in the direction opposite to the
direction of propagation (in other words, in the back direction of the loudspeaker system). As a
result, the frictional noise due to the air flowing out from the closed space formed based on the
convex edge 9a and the concave edge 9b to the open space formed based on the convex edge 9a
is emitted in the front direction of the speaker device Can be almost or completely prevented.
[0084]
As a result of the above, in the speaker apparatus having a shape relatively long in the reference
direction such as the X-axis direction, for example, high-quality sound which effectively prevents
the generation of the above-mentioned abnormal sound and frictional noise when viewed from
the sound propagation direction. It is possible to realize regeneration.
[0085]
(3) Second Embodiment Next, a speaker device according to a second embodiment will be
described with reference to FIG. 6 to FIG.
12-05-2019
24
[0086]
(3-1) Overall Configuration First, with reference to FIG. 6, one and other overall configurations of
the speaker device according to the second embodiment will be described.
Here, FIG. 6 is a plan view conceptually showing one and other configurations of the diaphragm,
the convex edge, and the concave edge of the speaker device 100 according to the second
embodiment of the speaker device of the present invention (FIG. (A) to FIG. 6 (d).
[0087]
As shown in FIG. 6 (a) to FIG. 6 (d), one and the other whole configurations in the speaker
apparatus according to the second embodiment are line symmetrical or The edge of the double
structure comprised by the convex edge arrange | positioned point-symmetrically and several
concave edges is provided.
Specifically, hatched portions in FIG. 6A to FIG. 6D indicate the edge of the double structure
constituted by the convex edge and the concave edge, that is, the above-mentioned closed space,
The white parts in a) to FIG. 6 (d) indicate the above-mentioned opening space constituted by the
convex edge.
[0088]
Specifically, as shown in FIG. 6A, the edges of the double structure constituted by a total of four
convex edges and concave edges may be provided at both ends in the X-axis direction. Further, as
shown in FIG. 6 (b), in most of the long side in the X-axis direction and most of the short side in
the Y-axis direction, a total of four convex edges and concave edges are formed. The edge of the
double structure may be provided. Further, as shown in FIG. 6 (c), a double constituted by a total
of six convex edges and concave edges at both ends in the X-axis direction and most of the short
sides in the Y-axis direction. The edges of the structure may be provided. Further, as shown in
FIG. 6D, by both the end portions in the X-axis direction and most of the short sides in the Y-axis
direction, in other words, in the corner portions, a total of four convex edges and concave edges
It is possible to provide the edge of the double structure that is configured.
12-05-2019
25
[0089]
Therefore, based on the stiffness of the edge of the double structure configured by the convex
edge and the plurality of concave edges, for example, the left or right portion when viewed from
the propagation direction when driving the diaphragm 8 of the speaker device The two ends in
the X-axis direction are more effectively prevented from rolling and becoming unbalanced, and
the vibration direction of the diaphragm is greatly offset from the propagation direction and
inclined. It is possible to more effectively prevent the As a result, it is possible to more effectively
prevent the occurrence of rolling and to more effectively prevent the occurrence of abnormal
sound and the breakage of the speaker device due to the collision between the vibration system
and the magnetic circuit. In particular, the concave edge is not formed on the entire outer
peripheral portion of the diaphragm, but is formed on a part thereof, thereby supporting the
physical characteristics of the vibration system including the diaphragm and the support
including the damper and the edge in the speaker device. Depending on the physical properties
of the system, it is possible to keep the lowest resonance frequency of the loudspeaker device
determined at a low level. As a result, in the speaker device, it is possible to reproduce highpitched sound in high quality.
[0090]
(3-2) Detailed Configuration Next, with reference to FIG. 7 and FIG. 8, one and other detailed
configurations in the speaker apparatus according to the second embodiment will be described.
FIG. 7 is a cross-sectional view conceptually showing one and the other configurations of the
convex edge and the concave edge of the speaker device 100 according to the second
embodiment of the speaker device of the present invention (FIG. 7A) Through FIG. 7 (d)). FIG. 8 is
a sectional view conceptually showing one configuration and another configuration of the convex
edge and the concave edge of the speaker device 100 according to the second embodiment of the
speaker device of the present invention (FIGS. 8A to 8C). (D)).
[0091]
As shown in FIG. 7 (a) to FIG. 7 (d), based on the stiffness of the edge of the double structure
constituted by the convex edge and the concave edge whose cross-sectional shape is
substantially line symmetric, At the time of driving the diaphragm 8 of the speaker device, for
12-05-2019
26
example, the two ends in the X-axis direction, such as the left or right portion seen from the
propagation direction, are likely to roll or become unbalanced. It is possible to effectively prevent
the vibration direction of the diaphragm from being greatly separated from the propagation
direction and to be inclined more effectively. As a result, it is possible to more effectively prevent
the occurrence of rolling and to more effectively prevent the occurrence of abnormal sound and
the breakage of the speaker device due to the collision between the vibration system and the
magnetic circuit.
[0092]
Specifically, as shown in FIG. 7A, a substantially rhombus shape may be formed by the cross
sectional shape of the convex edge 9a and the cross sectional shape of the concave edge 9b.
Further, as shown in FIG. 7B, a substantially triangular shape may be configured by the crosssectional shape of the convex edge 9a and the cross-sectional shape of the concave edge 9b.
Further, as shown in FIG. 7C, in order to buffer the deformation force applied to the edge of the
double structure constituted by the convex edge 9a and the concave edge 9b, the sectional shape
of the convex edge 9a, The cross-sectional shape of the recessed edge 9b may constitute a
generally rhombic shape having an inwardly indented portion. Further, as shown in FIG. 7D, the
width of the concave edge 9b may be larger than the width of the convex edge 9a. As a result,
since the stiffness of the concave edge 9b can be made smaller than the stiffness of the convex
edge 9a, the lowest resonance frequency of the speaker device determined by the physical
characteristics of the vibration system and the physical characteristics of the support system. Can
be maintained more effectively at lower levels.
[0093]
In particular, as shown in FIG. 8A to FIG. 8D, the concave edge 9b is a propagation direction of
air present in a closed space formed by the convex edge 9a and the concave edge 9b. A hole may
be provided to flow out in the direction opposite to the Z-axis direction. Therefore, it is possible
to allow air to flow out of the closed space through the hole in the direction opposite to the
propagation direction (in other words, to the rear side of the speaker device). As a result, it is
possible to disperse the outflow of frictional noise due to the air flowing out of the closed space
formed based on the convex edge 9a and the concave edge 9b, and to further reduce the noise
level of the frictional noise.
[0094]
12-05-2019
27
As a result of the above, in the speaker device having a shape relatively long in the reference
direction such as the X-axis direction as viewed from the sound propagation direction, for
example, high-quality sound reproduction is realized with the noise level of frictional noise
further reduced. It is possible.
[0095]
(4) Third Embodiment Next, a loudspeaker device according to a third embodiment will be
described with reference to FIGS. 9 to 13.
[0096]
(4-1) Configuration Focusing on the Structure First, with reference to FIGS. 9 to 12, one and the
other focusing on the structure of the outer end portion of the convex edge 9a and the concave
edge 9b of the speaker apparatus according to the third embodiment. Will be described.
[0097]
(4-1-1) One Configuration (Part 1) First, referring to FIG. 9, one focusing on the structure of the
outer end portion of the convex edge 9a and the concave edge 9b of the speaker apparatus
according to the third embodiment. The configuration will be described.
Here, FIG. 9 is a schematic perspective view, a plan view, and a sectional view conceptually
showing one configuration of the concave edge of the speaker device 100 and the frame
according to the third embodiment of the speaker device of the present invention. 9 (a) to 9 (c).
[0098]
As shown in FIGS. 9 (a) to 9 (c), the frame 6 is substantially equal to the thickness of the outer
end of the recessed edge 9b in the bonded portion 6d to which the frame 6 and the recessed
edge 9b are bonded. You may make it have the level | step difference of depth.
As a result, when the convex edge and the concave edge are bonded to the frame, respectively, it
is possible to seal the space constituted by the convex edge, the concave edge and the frame.
12-05-2019
28
[0099]
Generally, in the speaker device assembling process, temporarily, the convex edge is bonded to a
part of the diaphragm and a part of the frame, and the concave edge is bonded to the entire
periphery of the diaphragm and the entire periphery of the frame In the latter case, it is possible
to bond the convex edge while sealing the space constituted by the convex edge, the concave
edge, and the frame in the second half of the assembly process of the speaker device.
However, if the concave edge is adhered to a part of the diaphragm and a part of the frame and
the convex edge is adhered to the entire periphery of the diaphragm and the entire periphery of
the frame as in the present embodiment, provisionally If the frame does not have a step having a
depth substantially equal to the thickness of the outer edge of the concave edge, the convex edge
is separated from the frame by the thickness of the outer edge of the concave edge, and the
convex edge and the frame And a gap is generated in the space formed by the convex edge, the
concave edge, and the frame.
[0100]
On the other hand, according to the present embodiment, the frame has a step having a depth
substantially equal to the thickness of the outer end of the recessed edge at the bonding portion
where the frame and the recessed edge are bonded. The outer end of the speaker is completely
accommodated in the step in the first half of the assembly process of the speaker device.
Therefore, the convex edge bonded in the latter half of the assembly process of the speaker
device is not separated from the frame by the thickness of the outer end of the concave edge, and
a gap is generated between the convex edge and the frame. Absent. Therefore, it is possible to
seal the space constituted by the convex edge, the concave edge and the frame. As a result, it is
possible to prevent unintended air from flowing out from the space constituted by the convex
edge, the concave edge, and the frame, and to realize high-quality sound reproduction in the
speaker device.
[0101]
(4-1-2) Other Configuration (Part 2) Next, referring to FIG. 10, another configuration focusing on
the structure of the outer end portion at the convex edge and the concave edge of the speaker
12-05-2019
29
apparatus according to the third embodiment. Will be explained. Here, FIG. 10 is a schematic
perspective view, a plan view, and a cross-sectional view conceptually showing another
configuration of the concave edge, the spacer and the frame of the speaker device 100 according
to the third embodiment of the speaker device of the present invention. It is a figure (Fig.10 (a) to
FIG.10 (c)).
[0102]
As shown in FIGS. 10A to 10C, the speaker device 100 according to the third embodiment has (i)
a thickness substantially equal to the thickness of the outer end portion of the concave edge 9b (
ii) It is possible to adhere to the opposite part where the convex edge (not shown) and the frame
6 face, excluding the adhesive part where the outer end of the convex edge (not shown) and the
outer end of the concave edge 9b are adhered A spacer may be further provided.
[0103]
As a result, when bonding the convex edge and the concave edge to the frame, it is possible to
seal the space constituted by the convex edge, the concave edge, the frame and the spacer.
[0104]
If there is no spacer having a thickness substantially equal to the thickness of the outer edge of
the concave edge, the convex edge is separated from the frame by the thickness of the outer edge
of the concave edge and the convex edge and the frame There is a gap between them, and a gap
is created in the space constituted by the convex edge, the concave edge, the frame and the
spacer.
[0105]
On the other hand, according to the present embodiment, the spacer is provided at the opposing
portion where the convex edge and the frame face each other except the bonding portion where
the outer end portion of the convex edge and the outer end portion of the concave edge are
bonded Be glued.
Therefore, the convex edge to be bonded in the assembly process of the speaker device is not
separated from the frame by the thickness of the outer end of the concave edge, and no gap is
generated between the convex edge and the frame.
12-05-2019
30
Therefore, it is possible to seal the space constituted by the convex edge, the concave edge, the
frame and the spacer.
As a result, it is possible to prevent unintended air from flowing out from the space constituted
by the convex edge, the concave edge, the frame, and the spacer, and it is possible to realize highquality sound reproduction in the speaker device.
[0106]
(4-1-3) Other Configuration (Part 3) Next, referring to FIG. 11, another configuration focusing on
the structure of the outer end portion at the convex edge and the concave edge of the speaker
apparatus according to the third embodiment. Will be explained. Here, FIG. 11 is a schematic
perspective view, a plan view, and a cross section conceptually showing another configuration of
the concave edge, the spacer, and the frame of the speaker device 100 according to the third
embodiment of the speaker device of the present invention. It is a figure (FIG. 11 (a) to FIG.11
(c)).
[0107]
As shown in FIGS. 11A to 11C, the speaker device 100 according to the third embodiment can be
installed between the outer end of the convex edge 9a and the outer end of the concave edge 9b.
The spacer may further include a step having a depth substantially equal to the thickness of the
outer end of the recessed edge 9b at the bonding portion where the spacer and the recessed edge
9b are bonded.
[0108]
As a result, when the convex edge 9 a and the concave edge 9 b are respectively adhered to the
spacer, it is possible to seal the space constituted by the convex edge, the concave edge, and the
spacer.
[0109]
If the spacer does not have a step having a depth substantially equal to the thickness of the outer
edge of the concave edge, the convex edge is separated from the spacer by the thickness of the
outer edge of the concave edge, and A gap is generated between the spacer and the spacer, and a
gap is generated in the space formed by the convex edge, the concave edge, and the spacer.
12-05-2019
31
[0110]
On the other hand, according to the present embodiment, the spacer has a step having a depth
substantially equal to the thickness of the outer end of the recessed edge at the bonding portion
where the spacer and the recessed edge are bonded.
Therefore, the convex edge bonded in the assembly process of the speaker device does not
separate from the spacer by the thickness of the outer end of the concave edge, and no gap is
generated between the convex edge and the spacer.
Therefore, it is possible to seal the space constituted by the convex edge, the concave edge, and
the spacer.
As a result, it is possible to prevent unintended air from flowing out from the space constituted
by the convex edge, the concave edge, and the spacer, and it is possible to realize high-quality
sound reproduction in the speaker device.
[0111]
The spacer has a step having a depth substantially equal to the thickness of the outer end portion
of the convex edge 9a at the bonding portion where the spacer and the convex edge 9a are
bonded, as the concept of the substantially opposite (pair) concept. However, it is possible to
receive almost the same effect.
[0112]
(4-1-4) Other Configuration (Part 4) Next, another configuration focusing on the structure of the
speaker device according to the third embodiment will be described with reference to FIG.
FIG. 12 is a schematic perspective view, a plan view, and a cross-sectional view conceptually
showing another configuration of the concave edge and the convex edge of the speaker device
100 according to the third embodiment of the speaker device of the present invention. (FIG. 12
12-05-2019
32
(a) to FIG. 12 (c)).
[0113]
As shown in FIG. 12 (a) to FIG. 12 (c), the convex edge 9a is the convex edge excluding the
bonding portion to which the outer end of the convex edge 9a and the frame (not shown) are
bonded. In the bonding portion where the 9a and the concave edge 9b are bonded, a step may be
provided having a depth substantially equal to the thickness of the outer end of the concave edge
9b.
[0114]
As a result, when bonding the convex edge 9a, the concave edge 9b, and the frame (not shown),
the space constituted by the convex edge 9a, the concave edge 9b, and the frame (not shown)
can be sealed. It is.
[0115]
If the convex edge 9a does not have a step having a depth substantially equal to the thickness of
the outer edge of the concave edge 9b, the convex edge is separated from the frame by the
thickness of the outer edge of the concave edge, A gap is generated between the convex edge and
the frame, and a gap is generated in the space formed by the convex edge, the concave edge, and
the frame.
[0116]
On the other hand, according to this embodiment, the convex edge 9a is an adhesive portion
where the convex edge and the concave edge are adhered except the adhesive portion where the
outer end of the convex edge and the frame are adhered. , And has a step having a depth
substantially equal to the thickness of the outer end of the concave edge.
Therefore, the outer end of the concave edge is completely accommodated in the step in the
assembly process of the speaker device.
Therefore, (i) one bonding portion where the outer end of the convex edge and the frame are
bonded, and (ii) the outer end of the concave edge and the other bonding portion where the
frame is bonded are substantially the same. It can be configured to be planar.
12-05-2019
33
Therefore, the convex edge bonded in the latter half of the assembly process of the speaker
device is not separated from the frame by the thickness of the outer end of the concave edge, and
a gap is generated between the convex edge and the frame. Absent. Therefore, it is possible to
seal the space constituted by the convex edge, the concave edge and the frame. As a result, it is
possible to prevent unintended air from flowing out from the space constituted by the convex
edge, the concave edge, and the frame, and it is possible to realize high-quality sound
reproduction in the speaker device.
[0117]
As a general opposite (paired) idea, the concave edge is a bonding portion where the concave
edge and the convex edge are bonded except the bonding portion where the outer end of the
concave edge and the frame are bonded. It is possible to achieve substantially the same effect by
having a step having a depth substantially equal to the thickness of the outer end of the convex
edge.
[0118]
(4-2) Configuration of Inner End Next, referring to FIG. 13, a configuration focusing on the
configuration of the inner end of the convex edge 9a and the concave edge 9b in the speaker
apparatus according to the third embodiment. explain.
FIG. 13 is a cross-sectional view conceptually showing the configuration of the concave edge, the
convex edge, and the diaphragm of the speaker device 100 according to the third embodiment of
the speaker device of the present invention.
[0119]
As shown in FIG. 13, (i) one bonding portion to which the inner end of the convex edge 9 a and
the diaphragm 8 are bonded, and (ii) the inner end of the concave edge 9 b to the diaphragm 8.
The other adhesive portion to be attached may sandwich the outer peripheral portion of the
diaphragm 8.
[0120]
12-05-2019
34
As a result, (i) one bonding step in which the inner end portion of the convex edge and the
diaphragm are bonded, and (ii) another bonding step in which the inner end portion of the
concave edge and the diaphragm are bonded It is possible to have another different process.
As a result, the assembly process of the speaker device with the diaphragm 8, and the convex
edge 9a and the concave edge 9b integrally bonded together as one unit, that is, the so-called
diaphragm assay, through two different bonding processes. Can be realized more efficiently and
simply.
[0121]
In the above-described embodiment, the speaker device and the speaker unit having the
elongated shape are described based on, for example, attention to design and aesthetics for home
use and car use and space saving. For example, the present invention is also applicable to an
elongated speaker device or a speaker unit in a large space such as a commercial concert hall or
a store.
[0122]
The present invention is not limited to the above-described embodiment, and can be suitably
modified without departing from the scope and spirit of the invention as can be read from the
claims and the specification as a whole. Moreover, it is contained in the technical scope of this
invention.
[0123]
FIG. 1A is a plan view of a speaker device 100 according to an embodiment of the present
invention, a cross-sectional view when cut along an X-Z plane, and a cross-sectional view when
cut along a Y-Z plane (FIG. ).
It is sectional drawing at the time of cut | disconnecting the speaker apparatus 100 which
concerns on the Example of the speaker apparatus of this invention by a YZ axial plane.
A perspective view (FIG. 3A) showing a conceptual configuration of a diaphragm, a convex edge,
and a concave edge provided in the speaker device according to the present embodiment, the
12-05-2019
35
convex edge and the concave edge are formed FIG. 3B is a cross sectional view conceptually
showing the vicinity of the outer peripheral portion of the diaphragm (FIG. 3B), and FIG. 3B is a
cross sectional view conceptually showing the vicinity of the outer peripheral portion of the
diaphragm having the convex edge formed thereon. c)) and a schematic view (FIG. 3 (d))
schematically showing the opening portion. A schematic perspective view (FIG. 4A) showing a
conceptual configuration of a diaphragm, a convex edge, and a concave edge, provided in a
speaker device according to a comparative example, a vibration in which the convex edge and the
concave edge are formed FIG. 4B is a cross-sectional view conceptually showing the vicinity of
the outer peripheral portion of the plate (FIG. 4B), and FIG. 4C is a cross-sectional view
conceptually showing the vicinity of the outer peripheral portion of the diaphragm having the
concave edge formed therein. FIG. 4 (d) is a schematic view schematically showing the opening
portion). As a physical operation principle of the speaker device according to the present
embodiment, a conceptual diagram schematically showing the vibration position of the
diaphragm (FIG. 5A) and a concept schematically showing the physical model of the diaphragm.
It is a figure (FIG.5 (b)). A plan view conceptually showing one and the other configurations of the
diaphragm, the convex edge, and the concave edge of the speaker device 100 according to the
second embodiment of the speaker device of the present invention (FIGS. 6A to 6 ( d)). Crosssectional views conceptually showing one and the other configurations of the convex edge and
the concave edge of the speaker device 100 according to the second embodiment of the speaker
device of the present invention (FIGS. 7A to 7D) It is. Cross-sectional views conceptually showing
one and the other configurations of the convex edge and the concave edge of the speaker device
100 according to the second embodiment of the speaker device of the present invention (FIGS.
8A to 8D) It is. A schematic perspective view, a plan view, and a cross-sectional view (from FIG.
9A) schematically showing the configuration of one of the concave edge and the frame of the
speaker device 100 according to the third embodiment of the speaker device of the present
invention. 9 (c)). An outline perspective view, a plan view, and a sectional view conceptually
showing another configuration of the concave edge, the spacer and the frame of the speaker
device 100 according to the third embodiment of the speaker device of the present invention
(FIG. 10A) Through FIG. 10 (c)). A schematic perspective view, a plan view, and a cross-sectional
view conceptually showing another configuration of the concave edge, the spacer, and the frame
of the speaker device 100 according to the third embodiment of the speaker device of the
present invention To FIG. 11 (c)). A schematic perspective view, a plan view, and a sectional view
(from FIG. 12A) conceptually showing another configuration of the concave edge and the convex
edge of the speaker device 100 according to the third embodiment of the speaker device of the
present invention It is FIG.12 (c).
It is sectional drawing which showed notionally the structure of the concave edge of the speaker
apparatus 100 based on 3rd Example of the speaker apparatus of this invention, a convex edge,
and a diaphragm. It is sectional drawing which showed the phenomenon of the general rolling
notionally.
12-05-2019
36
Explanation of sign
[0124]
7 Damper 9a Convex Edge 9b Concave Edge 70 Magnetic Circuit 71 Vibration System Member
100 Speaker Device
12-05-2019
37
Документ
Категория
Без категории
Просмотров
0
Размер файла
54 Кб
Теги
jp2008104057
1/--страниц
Пожаловаться на содержимое документа