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JP2008167313

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2008167313
The present invention provides a speaker having high reliability, in which the attachment portion
between the diaphragm and the edge is unlikely to be peeled off, in the speaker in which the
stress applied to the attachment portion between the diaphragm and the edge is large. When
fixing an outer edge portion of a diaphragm and an inner edge portion of an edge, a main body
portion 61 superimposed on the inner edge portion of the edge 18, an intrusion portion 62, an
inner edge portion of the edge 18, and the diaphragm It fixes using the fixing member 60
provided with the front-end | tip part 62a shape | molded in the bowl shape at the outer edge
part of the vibration part 15 through the outer edge part. [Selected figure] Figure 2
スピーカ
[0001]
The present invention relates to, for example, a speaker that vibrates a diaphragm by supplying
an audio current to generate a sound.
[0002]
For example, various speakers (for example, see Patent Document 1) are conventionally mounted
on a vehicle as a mobile body.
The speaker disclosed in Patent Document 1 includes a frame, a vibrating unit accommodated in
the frame, and a magnetic circuit unit attached to the frame and vibrating the vibrating unit to
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generate a sound.
[0003]
The vibration unit includes a voice coil to which an audio current is supplied, and a diaphragm
attached to the voice coil. The magnetic circuit part comprises a permanent magnet and locates
the voice coil in the magnetic gap.
[0004]
Also, the diaphragm is attached to the inner edge of the edge whose outer edge is formed in an
annular shape, and the inner edge of the edge is attached to the frame.
[0005]
In the speaker having the above-described configuration, an electromagnetic current (Lorentz
force) acts on the voice coil by supplying a voice current to the voice coil, thereby vibrating the
diaphragm and responding to the above-described voice current. Sound is generated in the
direction of acoustic radiation.
JP-A-8-9492
[0006]
A speaker and a drive cone for transmitting the vibration of a voice coil are provided as the
speakers mounted on the above-described automobile and the like, and the space between the
diaphragm and the frame is sealed to improve reproduction sound quality and extend life. Socalled air suspension speakers have been proposed. Unlike the speaker described in Patent
Document 1, such an air suspension speaker includes an air chamber. The air chamber is sealed
by the diaphragm, the drive cone, the edge and the frame, and the air chamber repeats expansion
and contraction when the diaphragm and the drive cone vibrate up and down, so the diaphragm
and the edge are better than other speakers. Or the stress applied to the attachment portion
between the drive cone and the edge is very large.
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[0007]
Therefore, in the air suspension speaker, there is a problem that the attachment portion between
the diaphragm and the edge or between the drive cone and the edge is more easily peeled off
than the conventional speaker.
[0008]
On the other hand, in a speaker, an air suspension speaker, etc. which are described in patent
document 1, when vibrating a diaphragm with a large amplitude, the sealed space formed
between a diaphragm and a flame | frame, especially an air chamber There is a problem that the
internal air pressure is increased, and the air is easily leaked from the mounting portion.
In addition, air leaks from the mounting portion to generate an abnormal sound, which degrades
the acoustic characteristics of the speaker.
[0009]
The present invention has been proposed to address such problems and the like as an example.
An object of the present invention is to provide a speaker having high reliability, for example, in a
speaker such as an air suspension speaker in which stress applied to the attachment portion
between the diaphragm and the edge is large, the attachment portion between the diaphragm
and the edge is hardly peeled off. Etc.
[0010]
In order to solve the above problems and achieve the object, the speaker of the present invention
according to claim 1 is a drive that acts on a frame, a magnetic circuit unit supported by the
frame, and a voice coil to which an audio current is supplied. A vibrating portion having a
vibrating portion that vibrates due to a force, and an edge disposed so as to surround the
vibrating portion and having an outer edge attached to the frame, the outer edge of the vibrating
plate and the inner edge of the edge And a fixing member for fixing the outer edge portion of the
diaphragm and the inner edge portion of the edge.
[0011]
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The speaker of the present invention according to claim 11 is a drive that transmits a driving
force acting on a frame, a magnetic circuit unit supported by the frame, a diaphragm, and a voice
coil to which an audio current is supplied to the diaphragm. A vibrating portion having a cone, a
first edge coupled to the diaphragm, and a second edge coupled to the drive cone, wherein outer
edges of the first edge and the second edge are attached to the frame; A fixing member which
penetrates one of the outer edge of the drive cone and the inner edge of the second edge and
enters the other to fix the outer edge of the drive cone and the inner edge of the second edge; It
is characterized by
[0012]
The speaker of the present invention according to claim 13 is a drive that transmits a driving
force acting on a frame, a magnetic circuit unit supported by the frame, a diaphragm, and a voice
coil to which an audio current is supplied to the diaphragm. A vibrating portion having a cone, a
first edge coupled to the diaphragm, and a second edge coupled to the drive cone, wherein outer
edges of the first edge and the second edge are attached to the frame; An outer edge portion of
the diaphragm and an inner edge portion of the edge are sewn and fixed with an elastic member
interposed therebetween.
[0013]
Hereinafter, an embodiment of the present invention will be described by taking the attachment
of the outer edge of the diaphragm and the inner edge of the edge as an example.
In the loudspeaker according to one embodiment of the present invention, the outer edge portion
of the diaphragm and the inner edge portion of the edge are fixed by a fixing member which
penetrates one of the outer edge portion of the diaphragm and the inner edge portion of the edge
and enters the other. doing.
By so doing, the outer edge portion of the diaphragm and the inner edge portion of the edge can
be reliably fixed by the fixing member, and the attachment portion between the diaphragm and
the edge is less likely to come off, thereby improving reliability.
In addition, it is possible to suppress the leakage of air from the mounting portion and to
suppress the generation of abnormal sound due to the leakage of air from the mounting portion,
and a speaker without deteriorating the acoustic characteristics of the speaker. Can improve the
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quality of
[0014]
The fixing member may include a main body overlapped with one of the outer edge of the
diaphragm and the inner edge of the edge, and an intrusion extending from the main body into
the other. In this case, the outer edge portion of the diaphragm and the inner edge portion of the
edge can be reliably fixed by the main portion overlapped with one of the outer edge portion of
the diaphragm and the inner edge portion of the edge and the intrusion portion intruding into
the other. In addition, the fixing member includes the main body, so that the area in which the
inner edge of the edge is in close contact with the outer edge of the diaphragm can be increased,
and air can be prevented from leaking from the attachment portion. . In addition, by providing
the main body with the fixing member, it is possible to increase the rigidity at the outer edge of
the diaphragm, to suppress the deflection of the diaphragm, and to improve the reproducibility of
the acoustic characteristics over a long period of time. it can.
[0015]
Further, the intruding portion may penetrate the other, and the fixing portion may include a
pinching portion, and the outer edge portion of the diaphragm and the inner edge portion of the
edge may be fixed by the main body portion and the pinching portion. In this case, since the
outer edge portion of the diaphragm and the inner edge portion of the edge can be held between
the sandwiching portion and the main body portion, the fixing can be performed reliably.
[0016]
Also, the fixing member may be integrally provided on the outer edge of the diaphragm. In this
case, the number of parts can be reduced because it is not necessary to use the fixing member as
a separate part.
[0017]
In addition, the vibrating portion may be provided with a center cap that is superimposed on the
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acoustic radiation direction of the diaphragm and attached to the diaphragm, and the fixing
member may be integrally provided on the center cap. In this case, since the center cap is
provided with the fixing member, in the speaker provided with the center cap, the number of
parts can be reduced because the fixing member does not have to be a separate part.
[0018]
In addition, the fixing member may include a lid that covers the outer edge or the inner edge of
the edge of the diaphragm, and an intrusion that extends from the lid and enters the other. For
example, the inner edge of the edge is disposed on the outer edge of the diaphragm, the fixing
member fixes the outer edge of the diaphragm and the inner edge of the edge, and the lid covers
the outer edge of the diaphragm In such a case, the presence of the lid can prevent peeling of the
inner edge of the edge from the outer edge of the diaphragm. Therefore, the outer edge of the
diaphragm and the inner edge of the edge can be fixed securely.
[0019]
Also, the fixing member may be annularly disposed along the outer edge or the inner edge of the
edge of the diaphragm. In this case, the outer peripheral portion of the diaphragm and the inner
peripheral portion of the edge can be reliably fixed by the annularly arranged fixing member.
[0020]
The vibrating portion further includes a second edge having an inner edge attached to the outer
edge of the drive cone, and one of the outer edge of the drive cone and the inner edge of the
second edge penetrates the other edge and A second fixing member may be provided to fix the
outer edge of the cone and the inner edge of the second edge. In this case, the fixation between
the outer edge of the drive cone and the inner edge of the second edge can be made less likely to
be peeled off by the second fixing member. Further, it is possible to prevent air from leaking out
from the mounting portion where the outer edge portion of the drive cone and the inner edge
portion of the second edge are attached, and to suppress generation of abnormal noise due to air
leaking out from the mounting portion. It is possible to improve the quality of the loudspeaker
without degrading the acoustic characteristics of the loudspeaker.
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[0021]
Moreover, you may provide the connection part which connected the fixing member and the 2nd
fixing member. In this case, since the fixing member and the second fixing member are pulled
together, the fixing strength can be compensated for each other.
[0022]
In addition, the vibration unit may include a drive cone that transmits the vibration of the voice
coil to the diaphragm, and a space surrounded by the frame, the diaphragm, and the drive cone
may be sealed. In this case, in the air suspension speaker including the sealed space, the
attachment portion between the edge and the diaphragm can be securely fixed. In addition, the
vibration of the diaphragm causes contraction and expansion of the sealed space to be repeated,
and the air pressure of the sealed space is increased to prevent air from leaking out from the
mounting portion. In addition, it is possible to suppress the occurrence of abnormal noise due to
the leakage of air, and it is possible to improve the quality of the speaker without degrading the
acoustic characteristics.
[0023]
Further, the outer edge of the drive cone and the inner edge of the second edge are fixed by a
fixing member which penetrates one of the outer edge of the drive cone and the inner edge of the
second edge and enters the other. As a result, the outer edge portion of the drive cone and the
inner edge portion of the second edge can be reliably fixed by the fixing member, and the
attachment portion of the drive cone and the second edge is less likely to be peeled off, thereby
improving reliability. In addition, it is possible to suppress the leakage of air from the mounting
portion and to suppress the generation of abnormal sound due to the leakage of air from the
mounting portion, and a speaker without deteriorating the acoustic characteristics of the
speaker. Can improve the quality of
[0024]
In addition, the fixing member may include a main body overlapped with one of the outer edge of
the drive cone and the inner edge of the second edge, and an intrusion extending from the main
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body into the other. In this case, the outer edge portion of the drive cone and the inner edge
portion of the second edge are securely fixed by the main portion overlapped with one of the
outer edge portion of the drive cone and the inner edge portion of the second edge and the
intrusion portion invading the other. Can. In addition, the fixing member includes the main body,
so that the area in which the inner edge of the second edge is in close contact with the outer
edge of the drive cone can be increased, and air leakage from the attachment portion can be
suppressed. it can.
[0025]
Further, the outer edge of the diaphragm and the inner edge of the edge may be sewn together
and fixed with the elastic member interposed therebetween. In this way, the outer edge of the
diaphragm and the inner edge of the edge can be sewn together securely, and furthermore, the
elastic member is generated when the outer edge of the diaphragm and the inner edge of the
edge are fixed. Since the gap can be filled, it is possible to prevent air from leaking out from the
fixing portion between the outer edge of the diaphragm and the inner edge of the edge.
[0026]
A first embodiment of the present invention will be described based on FIG. 1 and FIG. The
speaker 1 according to the first embodiment of the present invention shown in FIG. 1 is mounted
on an automobile or the like as a mobile body to provide voice information to the occupants of
the automobile.
[0027]
As shown in FIG. 1, the speaker 1 includes a frame 4, a magnetic circuit unit 2, and a vibrating
unit 3 that generates a sound.
[0028]
As shown in FIG. 1, the frame 4 includes a frame body 20, a connector frame (not shown), and a
gasket 23.
[0029]
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The frame body 20 is made of metal such as aluminum.
The frame main body 20 protrudes from an annular bottom portion 24, a cylindrical cylindrical
portion 25 formed to rise from the outer peripheral edge of the bottom portion, and an inner
surface (also referred to as an inner side surface or an inner peripheral surface) of the cylindrical
portion 25 And a flange portion 26.
[0030]
The flange portion 26 is formed in an annular shape and protrudes from the inner surface of the
cylindrical portion 25 toward the inside of the cylindrical portion 25.
The flange portion 26 is provided along the inner surface of the cylindrical portion 25 over the
entire circumference of the cylindrical portion 25.
[0031]
The connector frame is attached to the frame body 20. The connector frame is attached with a
connector that can be connected to the above-described amplifier mounted on a car or the like.
The connector may be a connector not only connectable to the amplifier but also connectable to
another electronic device.
[0032]
The gasket 23 is formed in an annular shape. The gasket 23 is superimposed on the outer edge
portion (outer periphery) of the frame main body 20, and is fixed to the frame main body 20 by
an adhesive or the like with an edge 18 described later between the outer edge portion. The
gasket 23 fixes the diaphragm 15 described later to the frame body 20 with the edge 18
interposed between the gasket 23 and the outer edge of the frame body 20.
[0033]
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The magnetic circuit unit 2 is attached to the magnetic circuit unit cover 22. Further, the
magnetic circuit unit cover 22 is attached to the frame 4 via the magnetic circuit unit 2.
[0034]
The magnetic circuit unit cover 22 includes an annular bottom portion 30 and a cylindrical
portion 31 formed to rise from the outer peripheral edge of the bottom portion 30. The magnetic
circuit unit cover 22 is fixed to a yoke 7 of the magnetic circuit unit 2 described later by bolts 32.
The plate 9 and the frame body 20 are fixed by bolts 33.
[0035]
As shown in FIG. 1, the magnetic circuit unit 2 includes a yoke 7 made of a magnetic body (socalled paramagnetic body or ferromagnetic body) or the like, a magnet 8 and a magnetic body
(so-called paramagnetic body or ferromagnetism) And a plate 9 made of body or the like. The
yoke 7 is an external magnetic type magnetic circuit integrally including an annular bottom plate
10 and a cylindrical center pole 11 formed to rise from the central inner edge of the bottom
plate 10. In this embodiment, an external magnet type magnetic circuit is disclosed. However, the
present invention relates to an internal magnet type magnetic circuit or a magnetic circuit using
both an internal magnet type and an external magnet type (a magnet is disposed inside and
outside a voice coil bobbin) Circuit) may be applied. In the present embodiment, the center pole
is formed with an opening that leads to the outside of the speaker device, but in the present
invention, the opening may not be formed.
[0036]
The magnet 8 is formed in an annular shape. The inner diameter of the magnet 8 is larger than
the outer diameter of the center pole 11. The magnet 8 is superimposed on the bottom plate 10
through the center pole 11 inside. The magnet 8 described above may be excited by a permanent
magnet or a DC power supply.
[0037]
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The plate 9 is formed in an annular shape. The inner diameter of the plate 9 is larger than the
outer diameter of the center pole 11. The plate 9 is superimposed on the magnet 8 in a state
where it passes through the center pole 11 of the yoke 7 and the voice coil bobbin 13 described
later. The yoke 7, the magnet 8 and the plate 9 described above are coaxially arranged such that
their centers are substantially the same. For this reason, the inner peripheral surfaces of the
magnet 8 and the plate 9 are spaced from the outer peripheral surface of the center pole 11 of
the yoke 7.
[0038]
Further, the yoke 7 described above is fixed to the cover 22 for the magnetic circuit portion by
the bolt 32 penetrating the cylindrical bottom portion 30 and the bottom plate 10. Further, the
plate 9 is fixed to the frame body 20 by screwing in the bolt 33 penetrating the bottom 24 of the
frame body 20. Thus, the plate 9 is fixed to the frame body 20 and the bottom plate 10 is fixed to
the magnetic circuit section cover 22. Of course, the yoke 7, the magnet 8 and the plate 9 are
arranged coaxially with the frame 4.
[0039]
With the configuration described above, the magnetic circuit unit 2 forms a magnetic gap G
having a magnetic flux density between the outer peripheral surface of the center pole 11 of the
yoke 7 and the inner peripheral surface of the plate 9. That is, in the magnetic gap G, the
magnetic circuit unit 2 applies an electromagnetic force (Lorentz force) to the voice coil 12 to
vibrate the drive cone 14 and the diaphragm 15.
[0040]
The vibrating portion 3 is fixed in the frame main body 20 of the frame 4. The vibration unit 3
includes a voice coil 12, a voice coil bobbin 13, a drive cone 14, a diaphragm 15, a center cap 16,
and the like. That is, the vibration unit 3 includes the drive cone 14 and the vibration plate 15.
Two voice coils 12 are provided in the present embodiment, and two voice coil bobbins 13 are
wound together (not shown). Further, these voice coils 12 are arranged coaxially with each other
before vibrating the diaphragm 15 and are arranged in the above-mentioned magnetic gap G of
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the magnetic circuit unit 2. Voice current is supplied to the voice coil 12.
[0041]
The voice coil bobbin 13 is formed in a cylindrical shape. The inner diameter of the voice coil
bobbin 13 is formed larger than the outer diameter of the center pole 11 of the yoke 7. The outer
diameter of the voice coil bobbin 13 is smaller than the inner diameter of the plate 9 and the
magnet 8. The voice coil bobbin 13 is disposed coaxially with the yoke 7, the plate 9, the voice
coil 12, and the like. One end of the voice coil bobbin 13 is inserted into the magnetic gap G, and
the voice coil 12 is attached to the outer periphery of the one end. The voice coil bobbin 13 is
movably supported along the central axis of the yoke 7 by the drive cone 14, the diaphragm 15,
and the like. The central axes of the yoke 7 and the voice coil bobbin 13 are substantially the
same as the central axis of the speaker 1.
[0042]
The drive cone 14 transmits the vibration of the voice coil 12 to a diaphragm 15 described later.
The drive cone 14 is made of resin or the like. The drive cone 14 is formed in an annular shape,
and the inner edge thereof is attached to the outer peripheral surface of the voice coil bobbin 13.
For this reason, the drive cone 14 is attached to the voice coil 12 via the voice coil bobbin 13.
[0043]
The inner edge of an edge 17 which is the second edge is attached (joined) to the outer edge of
the drive cone 14 by an adhesive or the like. The edge 17 is made of rubber or a resin material
(that is, a material having elasticity). The edge 17 is formed in an annular shape so as to
surround the drive cone 14.
[0044]
The edge 17 of the configuration described above is fixed to the flange 48 (i.e., the outer edge
portion) by being sandwiched between the flange portion 26 of the frame main body 20 and the
positioning member 34 of the wiring structure 5 described later. . That is, the drive cone 14 is
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attached to the frame body 20 or frame 4 via the edge 17. Further, the edge 17 is attached to the
frame 4 so as to be displaceable in the central axis direction of the drive cone 14 by deformation.
[0045]
The diaphragm 15 is made of resin or the like. The diaphragm 15 is formed in an annular shape.
The diaphragm 15 is fixed with a part of the drive cone 14 and, in particular, grooves indicated
by reference numerals 50, 51 and 52 in FIG.
[0046]
Further, the diaphragm 15 is disposed coaxially with the drive cone 14. The edge 18 is attached
(joined) to the outer edge of the diaphragm 15 by the fixing member 60 together with the
adhesive. As shown in FIG. 2, the fixing member 60 has a main body portion 61 superimposed on
the inner edge portion of the edge 18 and an intruding portion 62 extending from the main body
portion 61. The intruding portion 62 is provided on the inner edge portion of the edge 18 The
holes are penetrated into the holes of the outer edge portion of the diaphragm 15 provided
corresponding to the holes. Furthermore, the intruding portion 62 includes a tip portion 62a as a
pinching portion. The tip portion 62a as the sandwiching portion is formed into a bowl shape
larger than the outer diameter of the hole by heating with a soldering iron or the like, or by
exerting an external force. Therefore, the diaphragm 15 and the edge 18 are fixed by the fixing
member 60 so as to sandwich the outer edge of the diaphragm 15 and the inner edge of the edge
18 between the tip 62 a and the main body 61. Further, when the tip end portion 62a is formed
into a bowl shape, the outer edge portion of the diaphragm 15 and the tip end portion 62a may
be welded. The edge 18 is formed in a circular arc shape whose cross-sectional shape is convex
toward the acoustic radiation direction. The edge 18 is made of rubber or a resin material (that
is, a material having elasticity). The outer edge of the edge 18 is sandwiched between the outer
edge of the cylindrical portion 25 of the frame body 20 and the gasket 23 and fixed thereto. That
is, the diaphragm 15 is attached to the frame body 20 or the frame 4 through the edge 18.
Further, the edge 18 is elastically deformed so that the diaphragm 15 is attached to the frame 4
so as to be displaceable in the central axis direction of the speaker 1. Thus, the speaker 1 has a
plurality of (two in the illustrated example) edges 17 and 18.
[0047]
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The center cap 16 is made of resin or the like. The center cap 16 has a circular shape in a plan
view, and a cross-sectional shape thereof is formed in a convex shape toward the acoustic
radiation direction, and a central portion thereof is formed in a convex shape, and is formed in a
concave shape from the central portion toward the outer edge. The outer diameter of the center
cap 16 is larger than the inner diameter of the diaphragm 15 and smaller than the outer
diameter of the diaphragm 15. The outer periphery of the center cap 16 is superimposed on the
diaphragm 15, and the outer periphery is attached to the diaphragm 15 with an adhesive or the
like over the entire circumference.
[0048]
Of course, the drive cone 14, the diaphragm 15 and the center cap 16 of the vibration unit 3
described above are disposed coaxially with the frame 4 and the magnetic circuit unit 2. When
the current (sound current) according to the voice information is supplied to the voice coil 12,
the vibration unit 3 vibrates the diaphragm 15 to which the vibration of the voice coil 12 is
transmitted by the drive cone 14 along the central axis described above. And generate a sound
according to the audio current.
[0049]
A space K surrounded by the drive cone 14, the diaphragm 15 and the edges 17 and 18
described above and the inner surface of the frame main body 20 of the frame 4 is sealed. That
is, the space K surrounded by the drive cone 14, the diaphragm 15 and the edges 17, 18 and the
inner surface of the frame main body 20 of the frame 4 is kept airtight.
[0050]
Therefore, when the voice coil bobbin 13 of the vibration unit 3 mentioned above vibrates
together with the voice coil 12, the drive cone 14 transmits the vibration of the voice coil 12 to
the diaphragm 15, and when the diaphragm 15 vibrates, the drive cone The air in the space K
between the diaphragm 14 and the diaphragm 15 is repeatedly compressed and expanded due to
the displacement of the drive cone 14 and the diaphragm 15 and the displacement of the edges
17 and 18 to express an air spring.
[0051]
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In this embodiment, when the effective area of the diaphragm 15 is S1 and the effective area of
the drive cone 14 is S2, the difference S between the effective areas is S = S1-S2, and the drive
cone 14 and the diaphragm 15 Assuming that the volume V of air in the enclosed space K
between them, the stiffness which is the spring constant of the above air spring is proportional to
S / V.
That is, in the present embodiment, an abnormal behavior occurs such that the air in the sealed
space K between the drive cone 14 and the diaphragm 15 is expressed, and the diaphragm 15
operates with a very large amplitude by an air spring. In addition, it is possible to reproduce the
acoustic characteristics of the speaker 1 for a long time, and to maintain the reliability of the
speaker 1 even if the diaphragm 15 is vibrated with a large amplitude for a long time.
[0052]
In the speaker 1 having the above-described configuration, a voice current is supplied to the
voice coil 12 through a lead wire or the like (not shown), and the voice coil 12 disposed in the
magnetic gap G according to the voice current is along the central axis described above. To
vibrate. Then, the voice coil bobbin 13 in which the voice coil 12 is wound around the outer
periphery vibrates along with the drive cone 14 and the diaphragm 15 along the central axis of
the speaker 1. That is, the vibration of the voice coil 12 is transmitted by the drive cone 14 and
the vibration of the diaphragm 15 generates a sound according to the audio current. As
described above, the magnetic circuit unit 2 vibrates the diaphragm 15, that is, the vibration unit
3 to generate a sound.
[0053]
According to the present embodiment, since the outer edge portion of the diaphragm 15 and the
inner edge portion of the edge 18 are fixed by the fixing member 60, the fixing can be performed
more reliably compared with fixing only by the adhesive. The reliability is improved because
peeling is difficult even if a large stress is applied to the attachment portion between the outer
edge portion of the diaphragm 15 and the inner edge portion of the edge 18.
[0054]
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15
The fixing member 60 includes a main body portion 61 and an intruding portion 62, and heats a
tip end portion 62a of the intruding portion 62 and welds it to the outer edge portion of the
vibrating portion 15.
Therefore, the main body 61 superimposed on the inner edge of the edge 18, and the tip 62 a
where the intrusive part 62 penetrates the inner edge of the edge 18 and the outer edge of the
diaphragm 15 and is welded to the outer edge of the diaphragm 15. Thus, the inner edge of the
edge portion 18 and the outer edge of the diaphragm 15 can be securely fixed. Therefore, air can
be prevented from leaking from the fixed portions of the inner edge portion of the edge portion
18 and the outer edge portion of the diaphragm 15.
[0055]
Further, since the fixing member 60 can suppress the deflection of the outer edge portion of the
diaphragm 15, not only the reliability of connection between the outer edge portion of the
diaphragm 15 and the inner edge portion of the edge 18 is improved Input resistance can be
improved.
[0056]
Further, the speaker 1 has a spring property as an air spring expressed by air in the sealed space
K between the drive cone 14 and the diaphragm 15 as vibration energy of the voice coil bobbin
13, the drive cone 14 and the diaphragm 15. In order to absorb the vibration of the voice coil
bobbin 13 and to damp the vibration of the voice coil bobbin 13, it is not necessary to provide a
damper such as provided in a conventional speaker.
That is, in the speaker 1 of the present embodiment, the drive cone 14 and the diaphragm 15
themselves also serve as a damper for damping the vibration of the drive cone 14, the diaphragm
15 and the voice coil bobbin 13. There is no need to install a damper for supporting the voice
coil bobbin 13 at the rear of the unit, and the axial dimension can be shortened by omitting the
damper and its installation space, and the thickness reduction required for audio systems etc.
mounted on automobiles etc. Can be realized. Therefore, the configuration of the speaker 1 can
be simplified.
[0057]
The drive cone 14 coaxially mounted behind the diaphragm 15 to realize the space K between
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the sealed drive cone 14 and the diaphragm 15 may be made of the same material as the
diaphragm 15 and can Compared with a damper having a bellows structure, mechanical fatigue
is less likely to occur, so that it is possible to prevent the decrease in the reliability of the speaker
device due to the mechanical fatigue of the component parts, and to realize a longer life of the
speaker 1.
[0058]
A speaker as disclosed in Patent Document 1 is provided with a damper (corrugation damper)
having a bellows structure, and the lateral vibration of a vibrating portion such as a voice coil, a
voice coil bobbin or a drive cone (a direction perpendicular to the central axis of the voice coil In
order to prevent the movement of the voice coil, it is deformed in a direction perpendicular to the
central axis of the voice coil to prevent the rolling.
However, since the drive cone 14 and the diaphragm 15 do not locally deform significantly, it is
not necessary to provide a damper. In addition, as compared with the speaker as shown in Patent
Document 1, the unique vibration seen in the rolling phenomenon causing the sound quality to
be muddy or the rubbing noise such as generated by the voice coil bobbin 13 coming into
contact with the plate 9 or the magnet 8 It is possible to realize high-quality sound reproduction
without turbidity and without turbidity.
[0059]
The drive cone 14 and the edge 17 suppress abnormal behavior such as the diaphragm 15
operating with a very large amplitude by an air spring expressed by air in the space K, and the
acoustic characteristics of the speaker 1 are continuously It is possible to reproduce the acoustic
characteristics of the speaker 1 for a long time, and to maintain the reliability of the speaker 1
even if the diaphragm 15 is vibrated with a large amplitude for a long time.
[0060]
In the embodiment described above, the distal end portion 62a of the fixing member 60 is
welded, but as shown in FIG. 3, the adhesive 63 around the distal end portion 62a which
protrudes from the outer edge portion of the diaphragm 15 of the intrusion portion 62 It may be
fixed by
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By doing this, the present invention can be applied even when the fixing member 60 can not be
heated.
[0061]
Next, a second embodiment of the present invention will be described based on FIG. The same
parts as those of the first embodiment described above are designated by the same reference
numerals and the description thereof will be omitted.
[0062]
In the present embodiment, as shown in FIG. 4, a screw 64 as a fixing member for fixing the
outer edge of the diaphragm 15 and the inner edge of the edge 18 is shown. The outer edge and
the edge 18 of the diaphragm 15 are inserted by screwing the screw 64 into a screw hole
provided on the inner edge of the edge 18 and penetrating into a screw hole provided on the
outer edge of the diaphragm 15. The inner edge of the is fixed.
[0063]
According to the present embodiment, the outer edge portion of the diaphragm 15 and the inner
edge portion of the edge 18 are fixed because the fixing member for fixing the outer edge
portion of the diaphragm 15 and the inner edge portion of the edge 18 is fixed by the screw 64.
It can be fixed more reliably.
[0064]
Next, a third embodiment of the present invention will be described based on FIG.
The same parts as those of the first embodiment described above are designated by the same
reference numerals and the description thereof will be omitted.
[0065]
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18
In this embodiment, it is shown in FIG. 5 that the outer edge portion of the diaphragm 15 and the
inner edge portion of the edge 18 are fixed by using bolts 65 and nuts 66 which are fixing
members. The bolt 65 is passed through a hole provided on the inner edge of the edge 18 and
through a hole provided on the outer edge of the diaphragm 15. Thereafter, a nut 66, which is a
pinching portion, is screwed into the tip of the bolt 65, and the outer edge portion of the
diaphragm 15 and the inner edge portion of the edge 18 are sandwiched between the bolt 65
and the nut 66 to fix.
[0066]
According to the present embodiment, the outer edge portion of the diaphragm 15 and the inner
edge portion of the edge 18 are fixed by fixing the outer edge portion of the diaphragm 15 and
the inner edge portion of the edge 18 with the bolt 65 and the nut 66 as fixing members. Can be
fixed more securely.
[0067]
Next, a fourth embodiment of the present invention will be described based on FIG.
The same parts as those of the first embodiment described above are designated by the same
reference numerals and the description thereof will be omitted.
[0068]
In the present embodiment, as shown in FIG. 6, a fixing member 60 for fixing the outer edge of
the diaphragm 15 and the inner edge of the edge 18 is integrally formed on the outer edge of the
diaphragm 15. The fixing member 60 is molded in a state illustrated by a two-dot chain line in
FIG. 5 at the time of molding. When fixing the outer edge portion of the diaphragm 15 and the
inner edge portion of the edge 18, the boundary 60 a between the outer edge portion of the
diaphragm 15 and the fixing member 60 is bent to overlap the main body 61 on the inner edge
portion of the edge 18. In the same manner as in the first embodiment, the invading portion 62 is
passed through a hole provided on the inner edge of the edge 18 and then penetrated into a hole
provided on the outer edge of the diaphragm 15 so that the outer edge of the diaphragm 15 is
The distal end 62a of the intruding portion 62 protruding from the surface is heated with a
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soldering iron or the like, or an external force is applied to form the distal end 62a into a hooklike sandwiching portion. By sandwiching the outer edge of the diaphragm 15 and the inner edge
of the edge 18 between the tip 62 a and the main body 61, the outer edge of the diaphragm 15
and the inner edge of the edge 18 are fixed.
[0069]
According to this embodiment, since the fixing member 60 is integrally formed on the outer edge
portion of the diaphragm 15, the number of parts can be reduced because the fixing member 60
does not have to be a separate part.
[0070]
Next, a fifth embodiment of the present invention will be described based on FIG.
The same parts as those of the first embodiment described above are designated by the same
reference numerals and the description thereof will be omitted.
[0071]
In the present embodiment, as shown in FIG. 7, a fixing member 60 for fixing the outer edge of
the diaphragm 15 and the inner edge of the edge 18 is integrally formed on the outer edge of the
center cap 16. When the center cap 16 is attached to the speaker 1, the fixing member 60
formed on the outer edge of the center cap 16 is disposed on the inner edge of the edge 18, and
the invading portion 62 is the same as the first embodiment. It passes through the hole provided
in the inner edge portion and enters the hole provided in the outer edge portion of the
diaphragm 15. Thereafter, the tip 62a of the intruding part 62 protruding from the outer edge of
the diaphragm 15 is formed into a bowl-like sandwiching part by heating with a soldering iron or
the like, or by applying an external force. The fixing member 60 fixes the outer edge portion of
the diaphragm 15 and the inner edge portion of the edge 18 by forming the tip end portion 62 a
as a sandwiching portion. Further, when the tip end portion 62a is formed in a bowl shape, the
tip end portion 62a may be welded to the outer edge portion of the diaphragm 15.
[0072]
According to this embodiment, since the fixing member 60 is integrally formed on the outer edge
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20
of the center cap 16, the number of parts can be reduced because the fixing member 60 does not
have to be a separate part.
[0073]
Furthermore, since the center cap 16 is fixed by the fixing member 60, the center cap 16 itself
can be fixed more reliably.
[0074]
In the fourth and fifth embodiments described above, the tip end portion 62a of the intruding
portion 62 is formed in a bowl shape, but is not limited to this shape, and the outer edge portion
of the diaphragm 15 and the inner edge portion of the edge 18 Any shape may be used as long
as it can be sandwiched by the main body.
Moreover, it is also possible to fix more certainly using adhesives etc.
[0075]
In the first to fifth embodiments described above, the fixing of the outer edge of the diaphragm
15 to the inner edge of the edge 18 has been described, but the fixing of the outer edge of the
drive cone 14 to the inner edge of the edge 17 The same may apply to
[0076]
Next, a sixth embodiment of the present invention will be described based on FIG.
The same parts as those of the first embodiment described above are designated by the same
reference numerals and the description thereof will be omitted.
[0077]
In the present embodiment, as shown in FIG. 8, the outer edge of the diaphragm 15 and the inner
edge 18 of the edge are fixed by the fixing member 60, and the outer edge of the drive cone 14
and the inner edge of the edge 17 are fixed. The second fixing member 67 is fixed by the second
12-05-2019
21
fixing member 67, and the fixing member 60 and the second fixing member 67 are connected by
the connecting portion 68.
[0078]
The fixing member 60 penetrates the outer edge portion of the diaphragm 15 and the inner edge
portion of the edge 18, and the tip portion projecting to the inner edge portion of the edge 17 is
formed in a bowl shape and is fixed to the edge 17 with an adhesive or the like There is.
The second fixing member 67 penetrates the outer edge portion of the drive cone 14 and the
inner edge portion of the edge 17, and the tip end portion projecting from the inner edge portion
of the edge 17 is formed in a bowl shape, It is fixed.
[0079]
According to the present embodiment, the outer edge of the diaphragm 15 and the inner edge 18
of the edge are fixed by the fixing member 60, and the outer edge of the drive cone 14 and the
inner edge of the edge 17 are the second fixing member 67. Because the fixing member 60 and
the second fixing member 67 are connected by the connecting portion 68, when the diaphragm
15 vibrates and the space K expands, the fixing member 60 is directed to the second fixing
member 67. Since the pressing force acts on the edge 18 and the pressing force toward the
second fixing member 67 on the edge 17, the attachment between the diaphragm 15 and the
edge 18 and the attachment between the drive cone 14 and the edge 17 become even stronger.
Can prevent air from leaking and the like.
[0080]
Further, since the deflection of the outer edge of the diaphragm 15 and the outer edge of the
drive cone 14 can be simultaneously suppressed by the fixing member 60, the outer edge of the
diaphragm 15 and the inner edge of the edge 18 and the outer edge of the drive cone 14 and the
inner edge of the edge 17 In addition to the improvement of the reliability of the connection, it is
possible to improve the acoustic characteristics of the speaker 1 and to vibrate the diaphragm
with a further large amplitude to reproduce a loud sound.
[0081]
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22
The shape of the tip portion as the sandwiching portion of the fixing member 60 described above
is not limited to a bowl shape, and the outer edge portion of the diaphragm 15 and the inner
edge portion of the edge 18 are the main portion 61 and the tip portion 62a. You just need to
insert it
Of course, the second fixing member 67 may have a shape that allows the outer edge of the drive
cone 14 and the inner edge of the edge 17 to be sandwiched between the main body and the tip.
[0082]
In the first to sixth embodiments described above, there may be a plurality of places fixed by the
fixing member 60 (second fixing member 67).
In that case, it is preferable that it is an odd number location, and it is more preferable to arrange
the fixing members 60 (second fixing members 67) at equal intervals in the circumferential
direction.
By doing this, the mechanical strength is improved, so it is possible to suppress the occurrence of
split resonance (for example, occurrence of multiple resonances in the diaphragm).
[0083]
Further, FIG. 9 shows a layout of the fixing member 60 in the first to sixth embodiments. In FIG.
9A, nine (odd number) fixing members 60 are disposed circumferentially along the outer edge
portion of the diaphragm 15. In FIG. 9B, the fixing member 60 is disposed annularly along the
outer edge of the diaphragm 15. As shown in FIG. 9A, the odd number of fixing members 60 are
arranged circumferentially, so that it is possible to suppress the split resonance occurring in the
diaphragm 15 when the voice coil is driven. Become. By arranging the annular fixing member 60
as shown in FIG. 9 (b), the diaphragm 15 and the edge 18 can be firmly fixed, and even if the
speaker 1 is driven for a long period, the vibration is caused. It is possible to prevent peeling and
air leakage from the attachment portion between the plate 15 and the edge 18. Therefore, the
reliability of the speaker 1 can be improved.
12-05-2019
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[0084]
Further, FIG. 10 shows the speaker 1 in which the outer edge portion of the diaphragm 15 and
the inner edge portion of the edge 18 are fixed by being sewn together with a thread 71 or the
like with the elastic member 70 interposed therebetween. For the elastic member 70, known
materials such as foamed resin, rubber, felt made of synthetic fibers, etc. can be used. If the
elastic member 70 is not present, there is no obstacle when air leaks out, and an air passage is
easily formed outside. When air leaks out of the space K by, for example, loosening the
attachment portion between the diaphragm 15 and the edge 18 by using the elastic member 70
in order to prevent the passage from being formed, the elastic member 70 is used. Becomes an
obstacle and it becomes difficult to form an air passage. Further, in the mounting portion, the
elastic member 70 can be used to fill in a portion where the outer edge portion of the diaphragm
15 and the inner edge portion of the edge 18 are not firmly in close contact with each other.
Also, by using, for example, a fibrous yarn 71, the weight (equivalent mass) of the vibrating
portion 3 can be reduced, and the diaphragm 15 and the edge 18 can be securely fixed, and the
sensitivity of the speaker 1 can be improved Becomes possible. When the outer edge portion of
the diaphragm 15 and the inner edge portion of the edge 18 are sewn together by the elastic
member 70, a known sewing method can be applied. Moreover, according to the specification of
the speaker 1, the method of sewing can be changed. Therefore, the speaker 1 or the speaker 1
in which the expansion or contraction in the enclosed space between the speaker 1 or the
diaphragm 15 and the frame 4 is large or the interval between expansion and compression and
expansion from compression is small is small. It is possible to fix the diaphragm 15 and the edge
18 firmly by reducing the sewing interval of 71 and the like.
[0085]
In the first to fifth embodiments, the fixing of the outer edge portion of the diaphragm 15 and
the inner edge portion of the edge 18 by the fixing member 60 has been described as an
example. On the other hand, the fixing member 60 described above as shown in FIG. 11 may be
applied to the attachment of the outer edge of the drive cone 14 and the inner edge of the edge
17.
[0086]
Also, fixing means as shown in FIGS. 4, 5 and 6 may be used to attach the outer edge of the drive
cone 14 to the inner edge of the edge 17.
12-05-2019
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[0087]
Also, in FIG. 2, the inner edge of the edge 18 is disposed on the outer edge of the diaphragm 15,
the fixing member 60 is disposed on the inner edge of the edge 18, and the fixing member 60
vibrates. It is shown securing the outer edge of the plate 15 and the inner edge of the edge 18.
The fixing member 60 is formed with a lid (main body 61) that covers the inner edge of the edge
18. There is also a fixing method as shown in FIG. 12, FIG. 13, FIG. 14, and FIG. 15, for example,
regardless of this fixing method. Also, although not shown, there is a method of fixing the outer
edge of the diaphragm 15 and the inner edge of the edge 18 by arranging the two fixing
members 60 on the outer edge of the diaphragm 15 and the inner edge of the edge 18. There is
no particular limitation.
[0088]
Furthermore, it is also possible to apply the above-described fixing method to a fixing member
that fixes the outer edge of the drive cone 14 and the inner edge of the second edge 17.
[0089]
The following can be achieved by providing the cover with the fixing member 60 shown in FIGS.
2 and 12 to 15.
Taking FIG. 2 as an example, it is possible to prevent the inner edge of the edge 18 from peeling
off from the outer edge of the diaphragm 15 by the lid. Also, when an adhesive or the like is
used, it is possible to secure many adhesive surfaces between the lid and the inner edge of the
edge 18 or the outer edge of the diaphragm 15, and to secure many adhesive surfaces. It is
possible to increase the bonding strength between the outer edge portion 15 and the inner edge
portion of the edge 18. Therefore, since the fixing force between the outer edge portion of the
diaphragm 15 and the inner edge portion of the edge 18 can be increased by providing the lid
portion with the fixing member 60, peeling of the outer edge portion of the diaphragm 15 and
the inner edge portion of the edge 18 or Air leakage and the like can be suppressed, and the
acoustic characteristics of the speaker 1 can be maintained for a long time. That is, the reliability
and quality of the speaker 1 can be maintained for a long time.
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[0090]
According to the embodiment described above, the following speaker 1 can be obtained.
[0091]
(Supplementary Note 1) The frame 4, the magnetic circuit unit 2 supported by the frame 4, the
diaphragm 15 vibrating by the driving force acting on the voice coil 12 to which the audio
current is supplied, and the diaphragm 15 And an outer edge portion having an edge 18 attached
to the frame 4; and penetrating one of the outer edge portion of the diaphragm 15 and the inner
edge portion of the edge 18 and penetrating into the other; A speaker 1 comprising a fixing
member 60 for fixing the outer edge portion of the diaphragm 15 and the inner edge portion of
the edge 18.
[0092]
According to the supplementary note 1, the outer edge portion of the diaphragm 15 and the
inner edge portion of the edge 18 can be securely fixed by the fixing member 60, and the
attached portion of the diaphragm 15 and the edge 18 is hardly peeled off, thereby improving
reliability.
In addition, it is possible to suppress the leakage of air from the mounting portion and to
suppress the generation of abnormal noise due to the leakage of air from the mounting portion,
so that the speaker 1 can be maintained without deteriorating the acoustic characteristics of the
speaker 1. Can improve the quality of
[0093]
(Supplementary Note 2) Frame 4, magnetic circuit unit 2 supported by frame 4, diaphragm 15,
and drive cone 14 for transmitting driving force acting on voice coil 12 to which audio current is
supplied to diaphragm 15. The vibrating portion 3 has an edge 18 coupled to the diaphragm 15
and an edge 17 coupled to the drive cone 14. The edge 18 and the outer edge of the edge 17 are
attached to the frame 4. The outer edge and edge of the drive cone 14 A speaker 1 comprising a
fixing member 60 which penetrates one of 17 inner edges and penetrates the other to fix the
outer edge of the drive cone 14 and the inner edge of the edge 17.
[0094]
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26
According to Supplementary Note 2, the outer edge portion of the drive cone 14 and the inner
edge portion of the edge 17 can be securely fixed by the fixing member 60, and the attached
portion of the drive cone 14 and the edge 17 is less likely to be peeled off.
In addition, it is possible to suppress the leakage of air from the attachment portion and to
suppress the generation of abnormal sound due to the leakage of air from the attachment
portion, without reducing the acoustic characteristics of the speaker 1. The quality of the speaker
1 can be improved.
[0095]
(Supplementary Note 3) Frame 4, magnetic circuit unit 2 supported by frame 4, diaphragm 15,
and drive cone 14 for transmitting driving force acting on voice coil 12 to which audio current is
supplied to diaphragm 15. The vibrating portion 3 has an edge 18 coupled to the diaphragm 15
and an edge 17 coupled to the drive cone 14. The edge 18 and the outer edge of the edge 17 are
attached to the frame 4. The outer edge and edge of the diaphragm 15 A speaker 1 characterized
in that 18 and the inner edge portion are sewn together and fixed with an elastic member 70
interposed therebetween.
[0096]
According to Supplementary Note 3, the outer edge portion of the diaphragm 15 and the inner
edge portion of the edge 18 can be securely fixed by sewing together, and the elastic member 70
is further fixed to the outer edge portion of the diaphragm 15 and the inner edge portion of the
edge 18 The air gap can be filled at the time of fixing, so that air can be prevented from leaking
out from the fixing portion between the outer edge of the diaphragm 70 and the inner edge of
the edge 18.
[0097]
In addition, the Example mentioned above only showed the typical form of this invention, and
this invention is not limited to an Example.
That is, various modifications can be made without departing from the scope of the present
invention.
12-05-2019
27
[0098]
FIG. 1 is a cross-sectional view of a speaker according to a first embodiment of the present
invention.
It is an enlarged view of A part of the speaker shown by FIG.
It is explanatory drawing in the modification of a 1st Example. It is explanatory drawing of the
fixed part of the diaphragm concerning the 2nd Example of this invention, and an edge. It is
explanatory drawing of the fixed part of the diaphragm and edge concerning 3rd Example of this
invention. It is explanatory drawing of the fixed part of the diaphragm concerning the 4th
Example of this invention, and an edge. It is sectional drawing of the speaker concerning the 5th
Example of this invention. It is sectional drawing of the speaker concerning the 6th Example of
this invention. FIG. 7 is a layout view of a fixing member in the first to sixth examples of the
present invention. It is explanatory drawing of the fixing part of the diaphragm concerning the
other Example of this invention, and an edge. It is explanatory drawing at the time of applying
this invention to attachment with a drive cone outer edge part and an edge inner edge part. It is
explanatory drawing of the other fixing method of the fixing method of a diaphragm and an edge.
It is explanatory drawing of the other fixing method of the fixing method of a diaphragm and an
edge. It is explanatory drawing of the other fixing method of the fixing method of a diaphragm
and an edge. It is explanatory drawing of the other fixing method of the fixing method of a
diaphragm and an edge.
Explanation of sign
[0099]
DESCRIPTION OF SYMBOLS 1 speaker 2 magnetic circuit unit 3 vibration unit 4 frame 12 voice
coil 14 drive cone 15 diaphragm 17 edge (second edge) 18 edge 60 fixing member 61 main
body portion 62 intrusion portion 62a tip portion (clamping portion) 64 screw (fixing member )
65 bolt (body part, intrusion part) 66 nut (clasp part) 70 elastic member
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