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DESCRIPTION JP2018056851

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DESCRIPTION JP2018056851
Abstract: To provide a speaker unit capable of realizing high mounting rigidity and sufficient
weight reduction. A speaker unit 100 having a frame 30 to which a diaphragm 21 and a
magnetic circuit 22 are coupled, wherein the frame 30 supports the outer periphery of the
diaphragm 21 at one end opening and the magnetic circuit at the other end opening A tubular
portion 31 supporting the cylindrical portion 22 is provided. The tubular portion 31 includes a
change portion 31a whose opening area monotonously changes from the one end opening
toward the other end opening. [Selected figure] Figure 5
Speaker unit, electronic device and mobile device
[0001]
The present disclosure relates to a speaker unit, an electronic device, and a mobile device.
[0002]
Conventionally, a speaker is disclosed in which a frame supporting a diaphragm is reinforced by
a reinforcing rib (see Patent Document 1).
[0003]
International Publication No. 2013/161214
[0004]
By the way, in recent years, the further weight reduction is required for the vehicle-mounted
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1
speaker unit in order to improve the fuel consumption of a car, and the weight reduction is not
enough with the speaker given in patent documents 1.
[0005]
Thus, the present disclosure provides a speaker unit that can achieve sufficient weight reduction
while maintaining the structural strength of the speaker unit.
[0006]
The speaker unit according to one aspect of the present invention is a speaker unit having a
frame to which a diaphragm and a magnetic circuit are coupled, and the frame supports the
outer periphery of the diaphragm at one end opening, and the other end opening The tubular
portion includes a tubular portion supporting the magnetic circuit, and the tubular portion
includes a changing portion in which an opening area monotonously changes from the one end
opening toward the other end opening.
[0007]
In the speaker unit of the present disclosure, sufficient weight reduction can be realized while
securing the shape rigidity of the frame.
[0008]
FIG. 2 is a perspective view showing an example of the appearance of the speaker unit according
to Embodiment 1;
It is a figure which shows the example which fastens a speaker unit to an external housing |
casing.
It is an exploded perspective view showing an example of composition of a speaker unit.
It is a perspective view of a frame.
It is a figure which shows typically the cross section of the flame | frame in XZ plane.
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2
It is a top view of the frame at the time of seeing from the Z-axis direction positive side in FIG.
FIG. 5 is a perspective view of the frame when viewed from an angle different from FIG. 4.
It is a side view of the frame at the time of seeing from the 1st gaze direction D1 in FIG. It is a
side view of the frame at the time of seeing from the 2nd viewing direction D2 in FIG. 5 is a
perspective view of a frame according to Embodiment 2. FIG. It is a top view of the frame at the
time of seeing from the Z-axis direction plus side in FIG. It is a perspective view of the frame at
the time of seeing from an angle different from FIG. It is a side view of the frame at the time of
seeing from the 1st gaze direction D1 in FIG. It is a side view of the frame at the time of seeing
from the 2nd viewing direction D2 in FIG. FIG. 18 is an external view of an audio mini-component
system that is an electronic device in a third embodiment. FIG. 20 is a cross-sectional view of a
car that is a mobile device in a fourth embodiment. It is sectional drawing which shows typically
the 1st modification of a change part. It is sectional drawing which shows typically the 2nd
modification of a change part. It is sectional drawing which shows typically the 3rd modification
of a change part.
[0009]
The speaker unit according to one aspect of the present invention is a speaker unit having a
frame to which a diaphragm and a magnetic circuit are coupled, and the frame supports the
outer periphery of the diaphragm at one end opening, and the other end opening The tubular
portion includes a tubular portion supporting the magnetic circuit, and the tubular portion
includes a changing portion in which an opening area monotonously changes from the one end
opening toward the other end opening.
[0010]
According to this, while securing the shape rigidity required for a flame | frame, a flame | frame
can fully be reduced in weight.
Therefore, the speaker unit can be reduced in weight sufficiently.
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[0011]
Moreover, the shape of the said change part may be a shape which bulges outside.
[0012]
According to this, it is possible to obtain an appropriate acoustic resistance while securing the
rigidity of the frame and reducing the weight.
[0013]
Further, the changing portion may be curved at a predetermined curvature from the one end
opening toward the other end opening, and a center of curvature may be present outside the
changing portion.
[0014]
According to this, it is possible to easily form the frame.
[0015]
The whole of the tube portion may be the change portion.
[0016]
According to this, it is possible to effectively improve the rigidity against the buckling generated
when a force is applied to the cylindrical portion from the one end opening toward the other end
opening.
[0017]
Moreover, the said change part may be equipped with the penetrating part or the nonpenetrating lightening part in part.
[0018]
According to this, since the rigidity of the frame can be secured by the shape of the entire change
portion, it is possible to further reduce the weight by providing a lightening portion in a part of
the change portion.
[0019]
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4
Note that these general or specific aspects may be realized by an electronic device having a
speaker unit or a mobile device having a speaker unit.
[0020]
Hereinafter, the speaker unit according to one aspect of the present invention will be specifically
described with reference to the drawings.
[0021]
Each embodiment described below shows one specific example of the present invention.
The numerical values, shapes, materials, components, arrangement positions and connection
forms of the components, and the like described in the following embodiments are merely
examples, and are not intended to limit the present invention.
Further, among the components in the following embodiments, components not described in the
independent claim indicating the highest concept are described as arbitrary components.
[0022]
Embodiment 1 A speaker unit according to Embodiment 1 will be described.
[0023]
In the present embodiment, the central axis of the speaker unit is in the Z-axis direction, the
direction in which the connector is positioned with respect to the central axis is in the Y-axis
direction, and the direction orthogonal to the Z-axis and Y-axis directions is the X axis It will be
the direction.
In the drawing, the side to which the arrow indicating the X-axis, the Y-axis and the Z-axis points
is the plus side of each direction, and the opposite side of each direction is the minus side.
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The central axis of the speaker unit is the central axis of the substantially conical shape of the
speaker unit.
[0024]
[1−1.
Configuration of Speaker Unit] The configuration of the speaker unit 100 according to the first
embodiment will be described.
[0025]
FIG. 1 is a perspective view showing an example of the appearance of the speaker unit according
to the first embodiment.
FIG. 2 is a view showing an example in which the speaker unit is fastened to the external
housing.
FIG. 3 is an exploded perspective view showing an example of the configuration of the speaker
unit.
[0026]
The speaker unit 100 is a side of the frame 30 on which the speaker unit 100 emits a sound, and
the other side of the frame 30, for the purpose of improving airtightness and water tightness and
reducing flicker noise due to vibration during operation of the speaker unit 100. In many cases,
the first elastic member 10 and the second elastic member 40 are provided, respectively.
[0027]
The speaker unit 100 has a frame 30 to which a substantially conical diaphragm 21 and a
substantially cylindrical magnetic circuit 22 are coupled.
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The magnetic circuit 22 includes a magnet, a plate, and a yoke (not shown), and vibrates the
diaphragm 21 in accordance with an audio signal input to a voice coil (not shown).
The magnetic circuit 22 may be of an inner magnet type or an outer magnet type.
[0028]
The frame 30 supports the diaphragm 21.
In addition, the frame 30 has a plurality of fastening portions 33 of the frame 30 and a plurality
of through holes 112 provided in the outer casing 110 in a circular opening 111 provided in the
outer casing 110 such as a front door of a car. The speaker unit 100 is fixed to the external
housing by being fastened by a fastening member (not shown).
The frame 30 is made of, for example, a resin.
[0029]
[1−2.
Configuration of Frame] FIG. 4 is a perspective view of a frame according to the first
embodiment. FIG. 5 is a view schematically showing a cross section of the frame in the XZ plane.
FIG. 6 is a plan view of the frame when viewed from the Z axis direction plus side. FIG. 7 is a
perspective view of the frame when viewed from an angle different from that of FIG.
[0030]
As shown in these figures, the frame 30 has a substantially cylindrical tube portion 31, a pedestal
portion 32, a plurality of fastening portions 33, and a reinforcing portion 34. The frame 30 may
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further have a support portion 36, a plurality of connection portions 37, and a connector portion
38. Each component of the frame 30 is integrally formed of resin.
[0031]
The cylindrical portion 31 is a cylindrical portion that supports the outer periphery of the
diaphragm 21 at one end opening and supports the magnetic circuit 22 at the other end opening.
Further, the cylindrical portion 31 includes a change portion 31a in which the opening area in a
plane perpendicular to the axis (the Z axis in the drawing) from the one end opening to the other
end opening changes monotonously. Further, since the thickness of the change portion 31a is
substantially uniform, the inner peripheral surface and the outer peripheral surface of the change
portion 31a have substantially the same inclination.
[0032]
Here, the opening area is surrounded by the cylindrical portion 31 of the cross section obtained
by virtually cutting the cylindrical portion 31 in a plane perpendicular to the axis (Z axis in the
drawing) from the one end opening of the cylindrical portion 31 to the other end opening.
Indicates the area of the
[0033]
In the case of the present embodiment, as shown in FIG. 5, the whole of the cylindrical portion 31
is a change portion 31a.
In addition, the cylindrical portion 31 supports the magnetic circuit 22 via the beam-like
connection portion 37 and the support portion 36.
[0034]
The cylindrical portion 31 has a shape corresponding to the outer periphery of the diaphragm
21. In the case of the present embodiment, since the diaphragm 21 has a conical shape, the
cylindrical portion 31 has a substantially cylindrical shape. Accordingly, the change portion 31a
also has a substantially cylindrical shape (ring shape).
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[0035]
In the change portion 31a, the opening area monotonously increases as going from the one end
opening to the other end opening (as going in the negative direction of the Z axis in the drawing),
and further, the change in the opening area changes The shape of 31a is monotonically
increasing so as to expand outward. Specifically, the changing portion 31a is curved with a
predetermined curvature from the one end opening toward the other end opening, that is, curved
in an arc shape which is a part of a perfect circle, and the curvature center is the changing
portion 31a. Exist outside the
[0036]
The support portion 36 is a portion for supporting a part of the damper which is a vibrating part
of the speaker unit 100 and the magnetic circuit 22. Specifically, the support portion 36 is a
member including a substantially conical portion and a bottomed substantially cylindrical
portion. The support portion 36 is a portion covering the Z axis direction minus side of the
portion of the speaker unit 100 on the Z axis direction minus side, and has a shape
corresponding to the site of the speaker unit 100 on the Z axis direction minus side.
[0037]
The cylindrical portion 31 and the support portion 36 are connected by a plurality of connection
portions 37 such that the support portion 36 is positioned inward of the cylindrical portion 31 as
shown in FIG. 4. The plurality of connection portions 37 are beam-like portions.
[0038]
The pedestal portion 32 is a portion that extends outward from the outer periphery of the
cylindrical portion 31 and faces the opening provided in the external housing. The pedestal
portion 32 is a plate-like portion, and the airtightness and the water tightness between the
pedestal portion 32 and the opening portion are improved by sandwiching the second elastic
member 40 with the opening portion.
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[0039]
The cylindrical portion 31 has an abutment surface 35 facing the pedestal portion 32 on the
positive side in the Z-axis direction. The contact surface 35 is in contact with an opening (not
shown) provided in the housing on the side of the speaker unit 100 from which the sound is
emitted, via the first elastic member 10.
[0040]
The plurality of (three in the present embodiment) fastening portions 33 are portions provided in
the pedestal portion 32 at a plurality of positions surrounding the outer periphery of the
cylindrical portion 31. Specifically, the plurality of fastening portions 33 are portions extending
further outward from the pedestal portion 32 (sides away from the central axis) and projecting
therefrom, and are portions thicker than the pedestal portion 32. The plurality of fastening
portions 33 have through holes 33 a through which predetermined fastening members pass. The
predetermined fastening member is, for example, a screw, a bolt, a rivet or the like. That is, the
speaker unit 100 is fixed to the predetermined position of the opening 111 by being fastened to
the opening 111 by the predetermined fastening member in the plurality of fastening portions
33.
[0041]
Further, the plurality of fastening portions 33 have plate-like protruding portions 33 b that
protrude outward from the outer periphery of the cylindrical portion 31. Specifically, the platelike protruding portions 33b are a pair of portions formed with one fastening portion 33 at both
ends in the circumferential direction of the outer periphery of the cylindrical portion 31, and in
the Z axis direction and in the radial direction of the outer periphery It has a substantially
parallel shape. The projecting portion 33 b is continuously formed from the outer peripheral
surface of the cylindrical portion 31 to the surface on the plus side of the pedestal portion 32 in
the Z-axis direction. Therefore, the strength of the plurality of fastening portions 33 is secured,
and the bending of the plurality of fastening portions 33 with respect to the pedestal portion 32
can be reduced.
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[0042]
Further, the plurality of fastening portions 33 are arranged at positions separated by 120
degrees from each other with respect to the position of the frame 30 corresponding to the
central axis of the speaker unit 100. That is, the plurality of fastening portions 33 are arranged
at equal intervals on the outer periphery of the cylindrical portion 31.
[0043]
The plurality of reinforcing portions 34 are disposed in a plurality of regions between the
plurality of fastening portions 33 in the pedestal portion 32, and are fixed to the outer periphery
of the cylindrical portion 31 and the pedestal portion 32. The plurality of reinforcing portions 34
are fixed to the surface of the pedestal portion 32 on the opposite side to the opening 111 side
(that is, the positive side in the Z-axis direction). The plurality of reinforcing portions 34 have a
curved plate portion 34 a and a plurality of plate portions 34 b disposed between the curved
plate portion 34 a and the pedestal portion 32. That is, the plurality of reinforcing portions 34 is
a hollow structure having a plurality of spaces configured by the space between the pedestal
portion 32 and the curved plate portion 34a being partitioned by the plurality of plate portions
34b. The curved plate portion 34a itself is a solid structure. In addition, the plurality of plate
portions 34b are solid structures themselves.
[0044]
The curved plate portion 34 a is a curved plate-like portion disposed to face the pedestal portion
32. The curved plate portion 34 a extends outward from the outer peripheral surface of the
cylindrical portion 31 and intersects the axial direction of the cylindrical portion 31 (that is, the
Z-axis direction).
[0045]
The plurality of plate portions 34 b are fixed to the cylinder portion 31, the pedestal portion 32
and the curved plate portion 34 a in a posture crossing the cylinder portion 31, the pedestal
portion 32 and the curved plate portion 34 a, and in the circumferential direction of the outer
periphery of the cylindrical portion 31 It is a part arranged side by side.
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[0046]
The connector portion 38 is, as shown in FIG. 6, a first fastening portion 33A disposed on the X
axis direction plus side of the plurality of fastening portions 33, and a second fastening disposed
on the X axis direction minus side. It is a part which is provided between the part 33B and to
which a wire for inputting an audio signal to the speaker unit 100 is connected.
[0047]
Here, the shape of the plurality of reinforcing portions 34 as viewed from the side (that is, the
direction orthogonal to the Z-axis direction) will be described with reference to FIGS. 8 and 9.
[0048]
FIG. 8 is a side view of the frame as viewed from the first viewing direction D1 in FIG.
FIG. 9 is a side view of the frame as viewed from the second viewing direction D2 in FIG.
[0049]
As shown in FIGS. 8 and 9, the plurality of reinforcing portions 34 are viewed from the outside of
the cylindrical portion 31 on the opposite side (that is, the positive side in the Z-axis direction) to
the base portion 32 side (that is, the negative side in the Z-axis direction). And has a convex
curved surface shape on the negative side in the Z-axis direction.
That is, the shape of the curved plate portion 34 a of the plurality of reinforcing portions 34 is a
curved surface shape that protrudes to the negative side in the Z-axis direction.
[0050]
Further, the plurality of reinforcing portions 34 are disposed at both ends of the reinforcing
portion 34 in the circumferential direction of the outer periphery of the cylindrical portion 31
with the plurality of fastening portions 33 corresponding to the reinforcing portion 34 (that is,
on both ends of the reinforcing portion 34) It fixes to the protrusion part 33b of the two
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12
fastening parts 33).
Further, in the plurality of reinforcing portions 34, the first heights H11 and H21 from the
pedestal portion 32 at the first portions at both ends of the reinforcing portion 34 are the
centers of the plurality of fastening portions 33 of the reinforcing portion 34. It has a structure
higher than the second heights H12 and H22 from the pedestal 32 in the second portion. In
addition, the first heights H11 and H21 are approximately equal to the height of the cylindrical
portion 31 from the pedestal portion 32. The second heights H12 and H22 may be half or less
the height of the first heights H11 and H21. Further, the first heights H11 and H21 are the
maximum heights of the plurality of reinforcing portions 34 from the pedestal portion 32, and
the second heights H12 and H22 are the plurality of heights from the pedestal portion 32. The
height of the reinforcing portion 34 is the minimum height.
[0051]
In addition, the plurality of reinforcing portions 34 may have a shape along a direction from the
substantially central position of the reinforcing portions toward the central axis of the speaker
unit 100.
[0052]
Further, as shown in FIG. 6, FIG. 8 and FIG. 9, among the plurality of reinforcing portions 34, the
configuration of the first reinforcing portion 34A in which the connector portion 38 is disposed,
and the configuration in which the connector portion 38 is not disposed. The configuration is
different from that of the second reinforcing portion 34B.
[0053]
Specifically, among the plurality of reinforcing portions 34, the number of the plurality of plate
portions 34b of the first reinforcing portion 34A provided between the first fastening portion
33A and the second fastening portion 33B is the first The number of the plurality of plate
portions 34 b included in the second reinforcing portion 34 B other than the reinforcing portion
34 A is smaller.
Further, the first height H21 of the first reinforcing portion 34A is smaller than the first height
H11 of the first reinforcing portion 34B.
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Therefore, the rigidity of the first reinforcing portion 34A is smaller than the rigidity of the
second reinforcing portion 34B. This is because the connector 38 is disposed in the first
reinforcement 34A, so that the combined stiffness of the first reinforcement 34A and the
connector 38 is equal to the stiffness of the second reinforcement 34B. It is because it is
adjusting. That is, the rigidity of the plurality of regions between the plurality of fastening
portions 33 in the pedestal portion 32 is substantially equal to each other.
[0054]
[1−3. Effects, Etc.] The speaker unit 100 according to the present embodiment is generated
when the cylindrical portion 31 which is the main component of the frame 30 is the change
portion 31a of the substantially tapered shape, and thus the speaker unit 100 is attached to the
external housing 110. Distortion of the frame 30 can be suppressed. Therefore, the diaphragm
21 attached to the opening at one end of the cylindrical portion 31 can be held evenly, and a
sound without distortion can be reproduced. Further, since the thickness of the cylindrical
portion 31 is made constant, it is possible to reduce the weight of the speaker unit 100.
[0055]
Also, since the opening area is changed so that the cylindrical portion 31 spreads from the one
end opening where the diaphragm 21 is attached to the other end opening, one end opening
where high rigidity is necessary and weight is concentrated As a result, the speaker unit 100 can
be reduced in weight.
[0056]
In addition, since the change portion 31a is curved so as to expand outward, it is possible to
improve the buckling strength of the frame 30, and to suppress the acoustic resistance.
[0057]
In addition, the speaker unit 100 in the present embodiment is the speaker unit 100 fixed to the
opening 111 in a state in which the opening 111 is closed.
The speaker unit 100 includes a frame 30 coupled to the diaphragm 21 and the magnetic circuit
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22.
The frame 30 has a substantially cylindrical tube portion 31, a pedestal portion 32, a plurality of
fastening portions 33, and a plurality of reinforcing portions 34. The cylinder part 31 is a part
which supports the outer periphery of the diaphragm 21 arrange | positioned inside. The
pedestal portion 32 is a portion that extends outward from the outer periphery of the cylindrical
portion 31 and faces the opening 111. The plurality of fastening portions 33 are provided at a
plurality of positions surrounding the outer periphery of the cylindrical portion 31 in the
pedestal portion 32 and are portions to be fastened to the opening portion 111. The plurality of
reinforcing portions 34 are disposed in a plurality of regions between the plurality of fastening
portions 33 in the pedestal portion 32, on the outer periphery of the cylindrical portion 31 and
on the surface of the pedestal portion 32 opposite to the opening 111 side. It is a fixed part of
the hollow structure. The plurality of reinforcing portions 34 have a first portion whose height
from the pedestal portion 32 is the first height H11, H21, and a second height H12, H22 which
is lower than the first height H11, H21. And a second part.
[0058]
According to this, the second portions of the plurality of reinforcing portions 34 are lower than
the first portions. Therefore, the weight of the frame 30 can be reduced by the reduced amount.
Thus, the frame 30 can be sufficiently lightened, and the speaker unit 100 can be sufficiently
lightened.
[0059]
Further, in the present embodiment, the plurality of reinforcing portions 34 are fixed to the
cylindrical portion 31 and the pedestal portion 32 in a posture that intersects the cylindrical
portion 31 and the pedestal portion 32 and arranged in the circumferential direction of the outer
periphery of the cylindrical portion 31 It has a plurality of plate parts 34b arranged.
[0060]
According to this, in the hollow structure, the plurality of reinforcing portions 34 have the
plurality of plate portions 34 b fixed to the cylindrical portion 31 and the pedestal portion 32 in
a posture that intersects the cylindrical portion 31 and the pedestal portion 32.
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15
Therefore, the strength of the plurality of reinforcing portions 34 can be sufficiently ensured.
Therefore, it is possible to realize both the sufficient weight reduction of the frame and the
securing of sufficient strength.
[0061]
Further, in the present embodiment, the plurality of reinforcing portions 34 further have a
curved plate portion 34 a in the form of a curved plate disposed to face the pedestal portion 32,
and the plurality of plate portions 34 b include the pedestal portion 32 and the plurality of plate
portions 34 b. It is arrange | positioned between the curved plate parts 34a, and also it fixes to
the curved plate part 34a in the attitude | position which cross | intersects the curved plate part
34a.
[0062]
According to this, the plurality of reinforcing portions 34 are formed by the curved plate portion
34a disposed to face the pedestal portion 32, and the plurality of plate portions 34b disposed
between the pedestal portion 32 and the curved plate portion 34a. , Has a hollow structure.
Therefore, the strength of the pedestal 32 of the frame 30 can be sufficiently secured.
[0063]
Further, in the present embodiment, the plurality of reinforcing portions 34 are formed along the
direction from the substantially central position of the reinforcing portions 34 toward the central
axis of the speaker unit 100.
[0064]
Therefore, for example, when molding the frame 30, it is sufficient to use a mold having a shape
substantially parallel to a direction from the substantially central position of the reinforcing
portion 34 toward the central axis of the speaker main body 20. 30 resin molding can be easily
realized.
[0065]
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16
Further, in the present embodiment, the frame 30 is further provided between the first fastening
portion 33A and the second fastening portion 33B of the plurality of fastening portions 33, and
inputs an audio signal to the speaker main body 20. And a connector portion 38 to which a wire
for connection is connected.
Further, among the plurality of reinforcing portions 34, the rigidity of the first reinforcing
portion 34A provided between the first fastening portion 33A and the second fastening portion
33B is a second reinforcement other than the first reinforcing portion 34A. It is smaller than the
rigidity of the portion 34B.
[0066]
The rigidity of the first reinforcement portion 34A is smaller than the rigidity of the second
reinforcement portion 34B because the rigidity increases in the region of the pedestal portion 32
where the connector portion 38 is provided, as the connector portion 38 is formed. By doing this,
the rigidity in the plurality of regions of the pedestal portion 32 can be made uniform.
For this reason, by applying a load only to the specific part of the pedestal part 32, it is possible
to suppress that the specific part is deformed or damaged.
[0067]
Further, in the present embodiment, the number of the plurality of plate portions 34b of the first
reinforcing portion 34A is smaller than the number of the plurality of plate portions 34b of the
second reinforcing portion 34B. Therefore, the rigidity of the first reinforcing portion 34A can be
made smaller than the rigidity of the second reinforcing portion 34B with a simple configuration.
[0068]
Further, in the present embodiment, the plurality of reinforcing portions 34 have a curved
surface shape convex on the side of the pedestal portion 32 when viewed from the outside of the
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cylindrical portion 31 on the side opposite to the pedestal portion 32 side. For this reason, the
rigidity of the plurality of reinforcing portions 34 can be improved.
[0069]
Further, in the present embodiment, the plurality of fastening portions 33 have plate-like
protruding portions 33 b that protrude outward from the outer periphery of the cylindrical
portion 31. Further, in the plurality of reinforcing portions 34, both ends of the reinforcing
portion 34 in the circumferential direction of the outer periphery of the cylindrical portion 31
are further fixed to the projecting portions 33b of the plurality of fastening portions 33 to which
the reinforcing portions 34 correspond. Further, the heights H11 and H21 of the plurality of
reinforcing portions 34 from the pedestal portion 32 at both ends of the reinforcing portion 34
are the heights from the pedestal portion 32 at a portion between the plurality of fastening
portions 33 of the reinforcing portion 34. It has a structure higher than H12 and H22.
[0070]
Generally, by disposing a second elastic member 40 as a gasket between the pedestal portion 32
and the opening portion 111 of the speaker unit 100, the air tightness and the water tightness
are improved. In addition, in the speaker unit 100, the opening 111 is arranged such that a
compressive stress is exerted in the plurality of fastening portions 33 of the frame 30 after the
second elastic member 40 is disposed between the pedestal 32 and the opening 111. Is fastened
by a fastening member. Therefore, the pedestal portion 32 of the frame 30 receives the repulsive
force from the second elastic member 40. In particular, in the region between the plurality of
fastening portions 33 of the pedestal portion 32, the base member 32 is not fastened by the
fastening members, so it is easily deformed so as to be convex on the opposite side to the
opening 111. In the plurality of reinforcing portions 34, heights from the pedestal portion 32 at
both ends of the reinforcing portion 34 in the region between the plurality of easily deformable
fastening portions 33 of the pedestal portion 32 are a plurality of fastenings of the reinforcing
portion 34. It is set as the structure higher than the height from the pedestal part 32 in the part
between the parts 33. For this reason, it is possible to suppress deformation of the portion of the
pedestal portion 32 between the plurality of fastening portions 33 so as to be convex on the
opposite side to the opening 111. As described above, since deformation of the pedestal 32 can
be suppressed, generation of a gap between the pedestal 32 and the opening 111 can be
suppressed. Therefore, the air tightness and the water tightness between the speaker unit 100
and the opening 111 can be improved.
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[0071]
Further, in the present embodiment, the heights H11 (H21) of the plurality of reinforcing
portions 34 from the pedestal portion 32 at both ends of the reinforcing portion 34 are
substantially equal. Further, the heights H12 and H22 of the plurality of reinforcing portions 34
from the pedestal portion 32 in the vicinity of the center in the circumferential direction of the
outer periphery of the cylindrical portion 31 of the reinforcing portion 34 are from the pedestal
portion 32 of the reinforcing portion 34 The smallest height among the heights.
[0072]
For this reason, it can be effectively suppressed that the pedestal portion 32 is deformed so as to
be convex on the opposite side to the opening portion 111. Therefore, the air tightness and the
water tightness between the speaker unit 100 and the opening 111 can be effectively improved.
[0073]
Second Embodiment [2-1. Configuration of Frame] Next, a speaker unit according to Embodiment
2 will be described with reference to FIGS. 10 to 14.
[0074]
The speaker unit according to the second embodiment is the same as the speaker unit 100
according to the first embodiment except for the configuration of the frame 130, so only the
configuration of the frame 130 will be described. In addition, since the frame 130 mainly differs
from the configuration of the frame 30 according to Embodiment 1 and the configuration of the
plurality of reinforcing portions 134, the configuration of the plurality of reinforcing portions
134 will be mainly described. In addition, about the structure which is common in Embodiment
1, it demonstrates with the code | symbol similar to Embodiment 1. FIG. Moreover, the frame
130 is the structure by which each component 31-33, 134, 35-38 is integrally formed with resin.
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19
[0075]
FIG. 10 is a perspective view of a frame according to a second embodiment. FIG. 11 is a plan view
of the frame when viewed from the Z axis direction plus side. FIG. 12 is a perspective view of the
frame when viewed from an angle different from that of FIG.
[0076]
As shown in FIGS. 10 to 12, the plurality of reinforcing portions 134 have a wall portion 134 a
and a plurality of plate portions 134 b disposed between the wall portion 134 a and the tubular
portion 31.
[0077]
Similar to the plurality of reinforcing portions 34 of the frame 30 according to the first
embodiment, the plurality of reinforcing portions 134 are disposed in a plurality of regions
between the plurality of fastening portions 33 in the pedestal portion 32. , Is fixed to the pedestal
32.
The plurality of reinforcing portions 134 are fixed to the surface of the pedestal 32 opposite to
the opening 111 (that is, the positive side in the Z-axis direction). The plurality of reinforcing
portions 134 have a wall portion 134 a and a plurality of plate portions 134 b disposed between
the wall portion 134 a and the cylindrical portion 31. That is, the plurality of reinforcing portions
134 is a hollow structure portion having a plurality of spaces configured by the space between
the cylindrical portion 31 and the wall portion 134a being partitioned by the plurality of plate
portions 134b. The wall portion 134a itself is a solid structure. In addition, the plurality of plate
portions 134b themselves are solid structures.
[0078]
The wall portion 134 a is a curved plate-like portion that is provided upright on the pedestal
portion 32 outside the cylindrical portion 31 and is disposed to face the cylindrical portion 31.
The wall portion 134 a has a shape along the outer peripheral surface of the cylindrical portion
31.
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[0079]
The plurality of plate portions 134 b are fixed to the cylinder portion 31, the pedestal portion 32
and the wall portion 134 a in a posture crossing the cylinder portion 31, the pedestal portion 32
and the wall portion 134 a, and lined in the circumferential direction of the outer periphery of
the cylinder portion 31 It is a site to be arranged.
[0080]
Here, the shape of the plurality of reinforcing portions 134 as viewed from the side (that is, the
direction orthogonal to the Z-axis direction) will be described with reference to FIGS. 13 and 14.
[0081]
FIG. 13 is a side view of the frame when viewed from the first viewing direction D1 in FIG.
FIG. 14 is a side view of the frame viewed from the second viewing direction D2 in FIG.
[0082]
As shown in FIGS. 13 and 14, the plurality of reinforcing portions 134 are viewed from the
outside of the cylindrical portion 31 on the opposite side (that is, the positive side in the Z-axis
direction) to the base portion 32 side (that is, the negative side in the Z-axis direction). And has a
convex curved surface shape on the negative side in the Z-axis direction.
That is, the shape of the end portion on the positive side in the Z-axis direction of the wall
portion 134a of the plurality of reinforcing portions 134 is a curved shape convex on the
negative side in the Z-axis direction.
[0083]
Further, the plurality of reinforcing portions 134 are disposed at both ends of the reinforcing
portion 134 in the circumferential direction of the outer periphery of the cylindrical portion 31
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21
with the plurality of fastening portions 33 corresponding to the reinforcing portion 134 (that is,
on both ends of the reinforcing portion 134) It fixes to the protrusion part 33b of the two
fastening parts 33). Further, in the plurality of reinforcing portions 134, the first heights H31
and H41 from the pedestal portion 32 at the first portions at both ends of the reinforcing portion
134 are the centers of the plurality of fastening portions 33 of the reinforcing portion 134. It has
a structure higher than the second heights H32 and H42 from the pedestal 32 in the second
portion. The first heights H31 and H41 are substantially equal to the height of the cylindrical
portion 31 from the pedestal portion 32. The second heights H32 and H42 may be half or less
the height of the first heights H31 and H41. The first heights H31 and H41 are the maximum
heights of the plurality of reinforcing portions 134 from the pedestal portion 32, and the second
heights H32 and H32 are the plurality of heights from the pedestal portion 32. The height of the
reinforcing portion 134 is the minimum height.
[0084]
Further, the plurality of reinforcing portions 134 may have a shape along the axial direction of
the cylindrical portion 31 (that is, the Z-axis direction).
[0085]
Further, among the plurality of reinforcing portions 134, the configuration of the first reinforcing
portion 134A in which the connector portion 38 is disposed is different from the configuration of
the second reinforcing portion 134B in which the connector portion 38 is not disposed.
[0086]
Specifically, among the plurality of reinforcing portions 134, the number of the plurality of plate
portions 34b included in the first reinforcing portion 134A provided between the first fastening
portion 33A and the second fastening portion 33B is the first The number is smaller than the
number of the plurality of plate portions 34 b included in the second reinforcing portion 134 B
other than the reinforcing portion 134 A.
In addition, the first height H31 of the first reinforcement portion 134A is smaller than the first
height H31 of the first reinforcement portion 134B.
Therefore, the rigidity of the first reinforcing portion 134A is smaller than the rigidity of the
second reinforcing portion 134B. This is because, as in the first embodiment, the connector
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portion 38 is disposed in the first reinforcing portion 134A, so the combined stiffness of the first
reinforcing portion 134A and the connector portion 38 is the second reinforcing portion. This is
because adjustment is made to be equal to the rigidity of 134B. That is, the rigidity of the
plurality of regions between the plurality of fastening portions 33 in the pedestal portion 32 is
substantially equal to each other.
[0087]
[2−2. Effect, Etc.] The speaker unit in the present embodiment further has wall portions
134 a which are erected on pedestal portion 32 outside cylindrical portion 31 and arranged to
face cylindrical portion 31. . The plurality of plate portions 134b are disposed between the
cylindrical portion 31 and the wall portion 134a, and are further fixed to the wall portion 134a
in a posture crossing the wall portion 134a.
[0088]
According to this, the plurality of reinforcing portions 134 are hollow by the wall portion 134a
disposed to face the cylindrical portion 31 and the plurality of plate portions 134b disposed
between the cylindrical portion 31 and the wall portion 134a. Make up the structure. Therefore,
the strength of the pedestal portion 32 of the frame 130 can be sufficiently secured.
[0089]
Further, in the present embodiment, the plurality of reinforcing portions 134 have a shape along
the axial direction of the cylindrical portion 31 (that is, the Z-axis direction).
[0090]
For this reason, for example, when molding the frame 130, a mold having a shape substantially
parallel to the axial direction (Z-axis direction) of the cylindrical portion 31 may be used, so resin
molding of the frame 130 is easily realized. can do.
[0091]
(Modification example) [3-1.
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23
Modification 1] In the above embodiment, on the plus side in the Z-axis direction, the plurality of
reinforcing parts 34 have a curved surface shape that is convex on the minus side in the Z-axis
direction when viewed from the outside of the cylindrical part 31. However, it is not limited to
this.
For example, on the positive side in the Z-axis direction, a reinforced portion having a valley
shape convex on the negative side in the Z-axis direction as viewed from the outside of the
cylindrical portion 31 may be employed. Here, the valley-like shape is a shape in which two
planes intersect so as to be convex to the negative side in the Z-axis direction.
[0092]
[3−2. Modification 2] Further, in the above-described embodiment, in the plurality of
reinforcing portions 34, the first heights H11 and H21 from the pedestal portion 32 at both ends
of the reinforcing portion 34 correspond to the plurality of fastening portions of the reinforcing
portion 34. Although it is described that the structure is higher than the second heights H12 and
H21 from the pedestal portion 32 in the portion between 33, the present invention is not limited
thereto. That is, if it is a reinforcing portion of a structure having a first portion whose height
from the pedestal portion 32 is a first height and a second portion whose second height is lower
than the first height. The structure is not limited to the above.
[0093]
For example, the reinforcing portion may have a configuration in which the height of the central
portion of the reinforcing portion is higher than that of both ends and has a curved surface shape
convex on the Z axis direction plus side, or convex on the Z axis direction plus side The
configuration may have a mountain shape. In addition, the shape of a convex mountain shape on
the plus side in the Z-axis direction is a shape in which two planes intersect so as to be convex on
the plus side in the Z-axis direction.
[0094]
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[3−3. Modification 3] Further, in the above embodiment, the first heights H11 and H21 at
both ends of the plurality of reinforcing portions 34 are the heights at which the heights of the
plurality of reinforcing portions 34 from the pedestal portion 32 are the largest. It is said that it
is not limited to this. That is, the heights at both ends of the plurality of reinforcing portions 34
do not have to be the maximum height, or the heights at positions shifted from the both ends
may be the maximum height, or the height at the center is the maximum. It is good also as
composition which is height.
[0095]
In addition, although the second heights H12 and H22 at the centers of the plurality of
reinforcing portions 34 have the minimum height of the plurality of reinforcing portions 34 from
the pedestal portion 32, the present invention is not limited thereto. That is, the height at the
center of the plurality of reinforcing portions 34 may not be the minimum height, or the height
at the position offset from the center may be the minimum height, or the height at both ends may
be the minimum. It is good also as composition which is height
[0096]
[3−4. Modification 4] Further, in the above-described embodiment, although the
reinforcing portion 34 is formed across each of the plurality of regions between the plurality of
fastening portions 33, the reinforcing portion has a width of the region It does not have to be
formed over the whole. For example, both ends of the reinforcing portion may not be fixed to the
fastening portion.
[0097]
Third Embodiment Next, an example of an electronic device using the speaker unit 100 will be
described with reference to FIG. FIG. 15 is an external view of an audio mini-component system
which is an electronic device according to the third embodiment.
[0098]
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25
The speaker unit 100 is incorporated into the enclosure 201 to constitute a speaker system. The
mini component system 200 includes the speaker system, an amplifier 202 which is an
amplification unit of an electric signal input to the speaker unit 100, and a player 203 which
outputs a source input to the amplifier 202. That is, the mini component system 200 includes the
speaker unit 100 and an amplifier 202 which is a circuit unit for inputting an electrical signal to
the speaker unit 100.
[0099]
With this configuration, it is possible to realize an electronic device that can contribute to global
environment response by weight reduction and resource saving.
[0100]
Furthermore, since the strength of the frame can be secured also with respect to deformation and
mounting distortion at the time of mounting, it is possible to greatly reduce the size and realize
an electronic device capable of realizing low price, high quality and high reliability. it can.
Therefore, it is possible to exert a great effect that weight reduction, resource saving, price
reduction, high quality and high reliability of the electronic device can be realized.
[0101]
Fourth Embodiment Next, an example of a mobile device using the speaker unit 100 will be
described with reference to FIG. FIG. 16 is a cross-sectional view of an automobile which is a
mobile device according to the fourth embodiment.
[0102]
A car 300 is configured by incorporating the speaker unit 100 into a rear tray or a front panel
and using it as a part of car navigation or car audio. A car navigation system and a car audio
system constitute a circuit unit 301 for inputting an electric signal to a speaker. That is, an
automobile 300 which is a mobile device includes a speaker unit 100, a circuit unit 301 for
inputting an electric signal to the speaker unit 100, and a self-propelled main body 302 mounted
12-04-2019
26
with the speaker unit 100 and the circuit unit 301. Have.
[0103]
The mounting position of the speaker unit 100 to the automobile 300 is not limited to the rear
tray and the front panel, and may be any position such as a door, a ceiling, a pillar, an instrument
panel, or a floor.
[0104]
With this configuration, it is possible to save fuel consumption of the mobile device by reducing
its weight and resources, and to realize a mobile device capable of contributing to global
environment response.
Furthermore, since the strength of the frame can be secured also with respect to deformation and
mounting distortion at the time of mounting, it is possible to greatly reduce the size, and to
realize a mobile device capable of realizing low cost, high quality and high reliability. Can.
Therefore, it is possible to exert the great effect that weight reduction, resource saving, price
reduction, high quality and high reliability of the mobile device can be realized.
[0105]
Although the speaker unit according to one or more aspects of the present invention has been
described above based on the embodiment, the present invention is not limited to this
embodiment. Without departing from the spirit of the present invention, various modifications as
may occur to those skilled in the art may be applied to this embodiment, or a configuration
constructed by combining components in different embodiments may be one or more of the
present invention. It may be included within the scope of the embodiments.
[0106]
For example, in order to further reduce the weight of the speaker unit 100, a part of the change
part 31a may be provided with a penetrating or non-penetrating thin portion.
[0107]
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27
In addition, although the change portion 31a has been described as monotonically changing the
opening area while maintaining the thickness, the thickness may be changed partially in the
above-described lightening portion, a joint portion with the connection portion 37, and the like.
Absent.
[0108]
Moreover, the change part 31a may not be the whole cylinder part 31, but may be a part of
cylinder part 31 as shown in FIG.
[0109]
Further, as shown in FIG. 18, the change portion 31 a may have a shape which bulges inward.
In addition, as shown in FIG. 19, the change portion 31 a may have a smaller opening area on the
other end opening for supporting the magnetic circuit 22 than the opening area on the one end
opening to which the diaphragm 21 is attached. .
[0110]
The speaker unit is a speaker unit having a reinforcing portion, and includes a frame to which a
diaphragm and a magnetic circuit are coupled, and the frame includes a support portion for
supporting the outer periphery of the diaphragm, and an outer periphery of the support portion
And a plurality of fastening portions provided at a plurality of positions surrounding the outer
periphery of the support portion in the pedestal portion, and a plurality of regions between the
plurality of fastening portions in the pedestal portion. A plurality of reinforcing portions
arranged and fixed to the pedestal portion and the supporting portion, the plurality of reinforcing
portions having a first height from the pedestal portion; It may have one portion and a second
portion which is a second height lower than the first height.
[0111]
According to this, the second portion of each of the plurality of reinforcing portions is lower than
the first portion.
12-04-2019
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Therefore, the weight of the frame can be reduced by the amount of lowering.
Thus, the shape rigidity required for the frame can be secured, and the frame can be sufficiently
lightened, and the speaker unit can be sufficiently lightened.
[0112]
Further, the plurality of reinforcing portions are fixed to the support portion and the pedestal
portion in a posture that intersects the support portion and the pedestal portion, and a plurality
of plates arranged in the circumferential direction of the outer periphery of the support portion
You may have a part.
[0113]
According to this, the plurality of reinforcing portions have the plurality of plate portions fixed to
the support portion and the pedestal portion in a posture that intersects the support portion and
the pedestal portion.
Therefore, the strength of the plurality of reinforcing portions can be sufficiently secured.
Therefore, it is possible to realize both the sufficient weight reduction of the frame and the
securing of sufficient strength.
[0114]
Further, the plurality of reinforcing portions further have a curved plate-like curved plate portion
disposed to face the pedestal portion, and the plurality of plate portions are disposed between
the pedestal portion and the curved plate portion. It may be arrange | positioned, and also it may
be fixed to the said curved plate part in the attitude | position which cross | intersects the said
curved plate part.
[0115]
According to this, the plurality of reinforcing portions form a hollow structure by the curved
12-04-2019
29
plate portion disposed facing the pedestal portion and the plurality of plate portions disposed
between the pedestal portion and the curved plate portion ing.
Therefore, the strength of the pedestal of the frame can be sufficiently secured.
[0116]
Further, the plurality of reinforcing portions may have a shape along a direction from the
substantially central position of the reinforcing portion toward the central axis of the speaker
unit.
[0117]
For this reason, for example, when molding the frame, it is sufficient to use a mold having a
shape substantially parallel to the direction from the substantially central position of the
reinforcing portion toward the central axis of the speaker unit. Can be easily realized.
[0118]
Further, the plurality of reinforcing portions further have a wall portion which is erected on the
pedestal portion outside the support portion and is disposed to face the support portion, and the
plurality of plate portions are configured to support the support portion. It may be arranged
between the part and the wall, and may be fixed to the wall in a posture that intersects the wall.
[0119]
According to this, the plurality of reinforcing portions form a hollow structure by the wall portion
disposed to face the support portion and the plurality of plate portions disposed between the
support portion and the wall portion. ing.
Therefore, the strength of the pedestal of the frame can be sufficiently secured.
[0120]
Further, the plurality of reinforcing portions may have a shape along the axial direction of the
support portion.
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[0121]
For this reason, for example, when molding the frame, it is sufficient to use a mold having a
shape substantially parallel to the axial direction of the support portion, so that resin molding of
the frame can be easily realized.
[0122]
Further, the frame is further provided between a first fastening portion and a second fastening
portion of the plurality of fastening portions, and a connector to which a wire for inputting an
audio signal to the speaker unit is connected Of the plurality of reinforcements, the rigidity of the
first reinforcement provided between the first fastening part and the second fastening part is the
second reinforcement other than the first reinforcement. It may be smaller than the rigidity of
the reinforcement portion of
[0123]
In the region of the pedestal portion where the connector portion is provided, the rigidity is
increased by the amount of the connector portion, and therefore, the rigidity of the first
reinforcement portion is made smaller than the stiffness of the second reinforcement portion.
The rigidity in a plurality of regions of the part can be made uniform.
For this reason, by applying a load only to the specific part of the pedestal part 32, it is possible
to suppress that the specific part is deformed or damaged.
[0124]
The number of the plurality of plate portions included in the first reinforcement portion may be
smaller than the number of the plurality of plate portions included in the second reinforcement
portion.
[0125]
For this reason, the rigidity of the first reinforcing portion can be made smaller than the rigidity
of the second reinforcing portion with a simple configuration.
[0126]
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31
Further, the plurality of reinforcing portions may have a curved surface shape convex on the side
of the pedestal portion when viewed from the outside of the support portion on the side opposite
to the pedestal side.
[0127]
For this reason, the rigidity of a plurality of reinforcement parts can be improved.
[0128]
The plurality of reinforcing portions may have a convex valley shape on the side of the pedestal
portion when viewed from the outside of the support portion on the side opposite to the pedestal
side.
[0129]
For this reason, the rigidity of a plurality of reinforcement parts can be improved.
[0130]
Further, the plurality of fastening portions have plate-like projecting portions protruding outward
from the outer periphery of the support portion, and the plurality of reinforcing portions are (i)
further related to the circumferential direction of the outer periphery of the support portion.
Both ends of the reinforcing portion are fixed to the projecting portions of the plurality of
fastening portions to which the reinforcing portion corresponds, and (ii) the height from the
pedestal portion at the both ends of the reinforcing portion corresponds to that of the reinforcing
portion You may have a structure higher than the height from the said base part in the site | part
between these fastening parts.
[0131]
Generally, by arranging an elastic member as a gasket between the base portion and the opening
portion of the speaker unit, air tightness and water tightness are improved.
Further, in the speaker unit, the elastic member is disposed between the pedestal portion and the
opening, and the plurality of fastening portions of the frame is tightened by the fastening
member at the opening so that compressive stress is exerted. Receives repulsive force from
members.
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32
In particular, in the region of the pedestal portion between the plurality of fastening portions, the
base member is not fastened by the fastening members, so it is easily deformed so as to be
convex on the opposite side to the opening.
The height from the pedestal at both ends of the reinforcing portion in the region between the
plurality of easily deformable fastening portions is greater than the height from the pedestal at
the portion between the plurality of fastening portions of the reinforcing portion. Since the
structure is also high, it is possible to suppress deformation of the portion between the plurality
of fastening portions so as to be convex on the opposite side to the opening.
Therefore, the air tightness and the water tightness between the speaker unit and the opening
can be improved.
[0132]
Further, the plurality of reinforcing portions are substantially equal in height from the pedestal
portion at the both ends of the reinforcing portion, and the height from the pedestal portion in
the vicinity of the center in the circumferential direction of the reinforcing portion is the same. It
may be the smallest height of the height from the pedestal portion of the reinforcing portion.
[0133]
For this reason, it can be effectively suppressed that the pedestal portion 32 is deformed so as to
be convex on the side opposite to the opening.
Therefore, the air tightness and the water tightness between the speaker unit and the opening
can be effectively improved.
[0134]
Note that these general or specific aspects may be realized by an electronic device having a
speaker unit or a mobile device having a speaker unit.
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33
[0135]
The present disclosure is useful as, for example, a speaker unit that has high attachment rigidity
and can realize sufficient weight reduction.
[0136]
DESCRIPTION OF SYMBOLS 10 1st elastic member 21 diaphragm 22 magnetic circuit 30, 130
frame 31 cylinder part 31a change part 32 pedestal part 33 fastening part 33A 1st fastening
part 33B 2nd fastening part 33a through hole 33b protrusion part 34, 134 reinforcement
Section 34A First reinforcing section 34B Second reinforcing section 34a Curved plate section
34b Plate section 35 Contact surface 36 Support section 37 Connecting section 38 Connector
section 40 Second elastic member 100 Speaker unit 110 External housing 111 Opening 112
Through hole 134A first reinforcing portion 134B second reinforcing portion 134a wall portion
134b plate portion 200 mini component system 201 enclosure 202 amplifier 203 player 300
automobile 301 circuit portion 302 main body
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34
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