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JP2006060726

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2006060726
PROBLEM TO BE SOLVED: To provide a speaker unit having a high assembling efficiency and
capable of easily attaching and detaching a protective net. SOLUTION: In a speaker unit in which
a front side of a diaphragm is covered with a punching net formed in a circular plate shape using,
for example, a magnetized member such as a perforated steel plate, one inner edge portion is
formed in a diaphragm Fixed to the opening front of the speaker frame, and fixed to the opening
edge of the speaker frame, with the edge that supports the diaphragm in the axial direction, and
the groove or base end where the base end of the punching net loosely contacts It consists of a
punching net fixing part provided with a contact surface, and is integrally formed of a plastic
magnet member so that the outer peripheral edge of the edge and the inner periphery of the
punching net fixing part are connected, and punching is performed by the magnetic force of the
punching net fixing part. It is characterized in that attachment and detachment are facilitated by
fixing the net. [Selected figure] Figure 1
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[0001]
The present invention relates to a speaker unit in which a protective net is attached to the front
surface of a diaphragm, and more particularly, to a fixing structure capable of facilitating
attachment and detachment of the protective net.
[0002]
As a prior art example of the background art, a speaker unit in which a punching net
(corresponding to a protective net) is attached to the front of a diaphragm will be described with
reference to FIGS. 10 and 11. FIG.
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[0003]
FIG. 10 is a front sectional view showing a speaker unit of the background art.
FIG. 11 is an enlarged cross-sectional view showing components in the vicinity of the edge
portion of the speaker unit of the background art.
[0004]
50 is a typical cone-shaped diaphragm 55, and is a protective net for covering and protecting the
front surface of the diaphragm 55 with a punching net 57 (for example, a circular disc shape, Is a
speaker unit of the background art in which a perforated steel plate or the like is used and is
formed by pressing or the like.
[0005]
The magnetic circuit 60 for driving the diaphragm 55 serving as the sound source of the speaker
unit 50 is an external magnet type in which the annular magnet 60c is held between the pole
piece 60a and the plate 60b. The pole portion 60g of the pole piece 60a and the plate 60b The
bobbin 50e around which the voice coil 60d is wound is disposed in the gap with the hole
diameter of.
Further, the base end 59a of the speaker frame 59 is fixed to the front side of the plate 60b.
The base end 55a of the diaphragm 55 is adhesively fixed to the upper end 60f of the bobbin
60e, and the bobbin 60e is supported by a damper 61 attached to the speaker frame 59. The
inner peripheral edge 56a of the edge 56 for supporting the diaphragm 55 in the axial direction
is adhesively fixed to the opening front surface 55b of the diaphragm 55, and the outer
peripheral edge 56b of the bonded edge 56 and the punching net The inner circumferential
portion 56b of the gasket 58 has a groove 58a for fixing the proximal end 57a of 57 (the groove
width of the groove 58a is narrower than the thickness of the proximal end 57a so that the
proximal end 57a can be crimped and fixed). It is integrally formed of a rubber member so as to
be connected. Then, the gasket 58 integrally formed with the edge 56 is fixed to the front side of
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the opening edge 59 b of the speaker frame 59 using a double-sided adhesive tape or an
adhesive. Therefore, the diaphragm 55 as a sound source is supported by the edge 56 and the
damper 61 in a suspended state inside the speaker frame 59.
[0006]
The following are prior art documents relating to the invention of this application. JP 6-26392
[0007]
However, in the above-described speaker unit 50, the proximal end portion 57a of the punching
net 57 is pressed into the groove 58a of the gasket 58 formed of a rubber member to fix the
punching net 57 by the elastic force of the groove 58a. Since the groove width of the groove 58a
of the gasket 58 is narrower than the thickness of the proximal end portion 57a of the punching
net 57, there remains a problem that it is difficult to fit the punching net 57 when assembled.
[0008]
In addition, since the gasket 58 is fixed to the opening edge 59b of the speaker frame 59 using a
double-sided adhesive tape or an adhesive, the assembly efficiency is low.
[0009]
An object of the present invention is to solve the above-mentioned problems, and to provide a
speaker unit having a high assembling efficiency and capable of easily attaching and detaching a
protective net.
[0010]
The present invention achieves the above-mentioned object, and in a speaker unit in which the
front side of the diaphragm is covered with a protective net formed of a magnetizing material,
one of the inner edges is the outside of the diaphragm. There is provided an edge portion fixed to
the peripheral portion, which supports the diaphragm in an axial direction in a variable manner,
and a front surface side fixed to the front side of the opening edge portion of the speaker frame
and the base end surface of the protective net abuts It is characterized in that it comprises a
spacer portion and is integrally formed of a magnet member so that the outer peripheral edge
portion of the edge portion and the inner peripheral portion of the spacer portion are connected.
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[0011]
Alternatively, the spacer portion is provided with a groove into which the proximal end portion of
the protective net is inserted.
[0012]
Alternatively, the front surface of the spacer portion is protruded from the front surface of the
edge portion.
[0013]
Alternatively, in a speaker unit in which the front side of the diaphragm is covered with a
protective net formed of a magnetizing material, one of the inner edges is fixed to the open front
of the diaphragm and the other outer edge is formed. And a protective net fixing part formed of a
magnet member and fixing the protective net by a magnetic force. The protective net fixing part
is characterized in that it is fixed to the opening edge of the speaker frame.
[0014]
Alternatively, the protective net fixing component is characterized in that an abutment surface
with which the proximal end face of the protective net abuts or a groove into which the proximal
end of the protective net is fitted.
[0015]
Alternatively, the front surface of the protective net fixing part is characterized in that the edge
protrudes from the front surface.
[0016]
Alternatively, the fixing surface of the protective net fixing component may be provided with a
step portion for releasing the portion of the outer edge portion of the edge fixed to the opening
edge portion of the speaker frame.
[0017]
Alternatively, the speaker frame is formed of a magnetizable material member.
[0018]
Alternatively, in a speaker unit in which a front surface side of the diaphragm is covered with a
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protective net formed of a magnetizing material member, a mounting member provided with an
opening that emits sound in front of the mounted speaker unit, and a magnet A protective net
fixing part formed of a member and fixing the peripheral side surface of the base end of the
protective net by a magnetic force, and the protective net fixing part is fixed to the open end face
of the mounting member It is a feature.
[0019]
Alternatively, the terminal end portion of the protective net fixing part is characterized in that a
groove into which the proximal end portion of the protective net is fitted or an abutting surface
with which the proximal end surface abuts is extended.
[0020]
Alternatively, the mounting member is a speaker box or a speaker grill.
[0021]
As described above, according to the present invention, it is possible to provide a speaker unit
having a high assembling efficiency and in which the protective net can be easily attached and
detached.
[0022]
A part of invention examples of a speaker unit in the case where a punching net (corresponding
to a protective net) is attached to the front surface of a cone-shaped diaphragm will be described
with reference to FIGS. 1 to 9.
[0023]
A first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3.
FIG. 1 is a front sectional view showing a speaker unit according to a first embodiment of the
present invention.
FIG. 2 is an enlarged cross-sectional view showing components in the vicinity of the edge portion
of the speaker unit according to the first embodiment.
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FIG. 3 is an enlarged cross-sectional view showing a fixing structure which is partially different
from the punching net fixing component of the first embodiment.
[0024]
As shown in FIGS. 1 and 2, the general cone-shaped diaphragm 15 described in the present
invention is configured as shown in FIGS. 1 and 2, and the front surface of the diaphragm 15 is
covered with a punching net 17 (covering the front surface of the diaphragm 15) For example, it
is a speaker unit having a circular plate shape, and a perforated steel plate of a magnetizable
magnetic material or the like is used as the material and is formed by pressing or the like.
The magnetic circuit 20 for driving the diaphragm 15 serving as a sound source is an external
magnetic circuit 20 in which an annular magnet 20c is held by the pole piece 20a and the plate
20b. The magnetic circuit 20 comprises the pole portion 20g of the pole piece 20a and the plate
20b. A bobbin 20e around which the voice coil 20d is wound is disposed in the gap with the hole
diameter.
The base end 19a of the speaker frame 19 is fixed to the front side of the plate 20b.
The base end 15a of the diaphragm 15 is adhesively fixed to the upper end 20f of the bobbin
20e, and the bobbin 20e is supported by the damper 21 attached to the speaker frame 19.
Further, one inner edge portion 16 a of the annularly formed edge 16 is adhesively fixed to the
opening front surface portion 15 b of the diaphragm 15.
Further, a groove 18a (base end 17a) for fixing the base end 17a of the punching net 17 can be
loosely inserted on the front side of the punching net fixing part 18 (corresponding to a spacer
portion) formed in an annular shape. The groove width of the groove 18a is formed wider than
the thickness of the end portion 17a.
The two components are a resin member (for example, synthetic rubber) and a magnetic body so
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that the outer peripheral edge portion 16b of the edge 16 bonded to the diaphragm 15 and the
inner peripheral edge portion 18b of the punching net fixing component 18 are connected. It is
integrally formed using a plastic magnet member mixed with the member.
Then, a portion of the punching net fixing part 18 integrally formed with the edge 16 is fixed to
the front surface side of the opening edge 19 b of the speaker frame 19 formed of a
magnetomagnetic material member by a magnetic force.
Therefore, the diaphragm 15 serving as a sound source is suspended inside the speaker frame 19
by the edge 16 and the damper 21, so that the diaphragm 15 is supported so as to be variable in
the axial direction.
[0025]
As described above, according to the speaker unit 10 of the first embodiment of the present
invention, the base end 17a of the punching net 17 is in the groove 18a formed in the portion of
the punching net fixing part 18 formed of the plastic magnet member. When loosely inserted, it
is configured to be attracted and fixed by the magnetic force of the punching net fixing part 18.
Further, since the groove width of the groove 18a of the punching net fixing part 18 is wider
than the thickness of the base end 17a of the punching net 17, the punching net 17 can be easily
attached and detached, and can be retrofitted. Become.
[0026]
In addition, since the punching net fixing part 18 is formed of a plastic magnet member, it can be
fixed to the opening edge 19 b of the speaker frame 19 by magnetic force.
Therefore, a double-sided pressure-sensitive adhesive tape or an adhesive for fixing is not
required, and the member cost can be reduced and the number of assembling steps can be
reduced.
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[0027]
Further, although the groove 18a in which the proximal end portion 17a of the punching net 17
is loosely inserted is provided in the punching net fixing part 18, the invention is not limited to
this, without providing the groove 18a in the punching net fixing part 18 as shown in FIG. The
contact surface 18c can be provided so that the base end surface 17b of the punching net 17
abuts.
[0028]
In the speaker unit 10 according to the first embodiment of the present invention, the speaker
frame 19 formed of the magnetically-magnetized member is used, but the speaker frame formed
of the non-magnetizable magnetic member such as the resin member is used. In the case of the
speaker unit, the punching net fixing part 18 is adhered and fixed to the speaker frame, but even
in this case, the attaching / detaching effect of the punching net 17 does not change with the
punching net fixing part 18 of the present invention.
In addition, although the circular speaker has been described in the first embodiment, the
present invention is not limited to this, and the present invention can be applied to a non-circular
speaker such as an elliptical speaker.
[0029]
Besides, in the present embodiment, a plastic magnet member is used as the material of the
punching net fixing part 18, but it is also possible to use a metal magnet member without being
limited to this.
[0030]
A second embodiment of the present invention will be described with reference to FIGS. 4 and 5.
[0031]
FIG. 4 is an enlarged cross-sectional view showing components in the vicinity of the edge portion
of the speaker unit according to the second embodiment of the present invention.
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FIG. 5 is an enlarged sectional view showing a fixing structure which is partially different from
the punching net fixing component of the second embodiment.
The second embodiment is a partial modification of the first embodiment. The same components
as those of the first embodiment are denoted by the same reference numerals and the description
thereof will be omitted.
[0032]
Reference numeral 25 denotes an edge, which is formed in an annular shape as shown in FIG. 4,
one inner edge 25a is fixed to the aperture front surface 15b of the diaphragm 15, and the other
outer edge 25b is the front edge side of the aperture edge 19b of the speaker frame 19. And the
diaphragm 15 is axially variably supported.
[0033]
Reference numeral 26 denotes a punching net fixing part, which has an annular shape as shown
in FIG. 4 and a groove 26a for fixing the base end 17a of the punching net 17 on the front side
(the base end 17a can be inserted loosely) The front surface of the punching net fixing part 26
protrudes from the front surface of the edge 25 to protect the edge 25.
A plastic magnet member is used as a material of the punching net fixing part 26 and is formed
by resin molding processing.
The punching net fixing part 26 is fixed to the front side of the opening edge 19 b of the speaker
frame 19 by magnetic force.
Thereafter, the base end 17 a of the punching net 17 is loosely inserted in the groove 26 a of the
punching net fixing part 26 and fixed by the magnetic force of the punching net fixing part 26.
[0034]
As described above, also in the speaker unit 11 according to the second embodiment of the
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present invention, the base end 17a of the punching net 17 is loosely inserted in the groove 26a
formed in the punching net fixing part 26 formed of the plastic magnet member. And, it is
configured to be attracted and fixed by the magnetic force of the punching net fixing part 26.
In addition, since the groove width of the groove 26a of the punching net fixing part 26 is wider
than the thickness of the base end 17a of the punching net 17, the punching net 17 can be easily
attached and removed, and can be retrofitted. Besides, since the front face of the punching net
fixing part 26 protrudes from the front face of the edge 25, the edge 25 can be protected.
Although the groove 26a in which the proximal end portion 17a of the punching net 17 is
loosely inserted is provided in the punching net fixing part 26, the present invention is not
limited to this and the proximal end face 17b of the punching net 17 may be in contact as shown
in FIG. The contact surface 26b can also be provided. In addition, there is a space between the
outer peripheral portion 25 c of the edge 25 bonded and fixed to the front surface of the opening
edge 19 b of the speaker frame 19 and the outer peripheral portion 19 c of the front surface of
the speaker frame 19. When the bonding surface of the edge 25 protrudes and there is a level
difference t, an annular shape that releases the level difference t of the edge 25 as necessary on
the inner peripheral edge side of the back surface side (fixed surface to the speaker frame 19) of
the groove 26a forming surface. By forming the step T, the fixing surface of the punching net
fixing component 26 directly contacts the opening edge 19 b of the speaker frame 19, so that the
suction force to the speaker frame 19 is further strengthened.
[0035]
Although the plastic magnet member is used as the material of the punching net fixing part 26 in
the present embodiment, it is also possible to use a metal magnet member without being limited
to this.
[0036]
Third Embodiment A third embodiment of the present invention will be described with reference
to FIGS.
[0037]
FIG. 6 is a front sectional view showing a speaker unit according to a third embodiment of the
present invention.
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FIG. 7 is an enlarged sectional view showing components in the vicinity of the edge portion of the
speaker unit according to the third embodiment.
FIG. 8 is an enlarged sectional view showing the fixing structure 1 of the punching net fixing
component of the third embodiment. FIG. 9 is an enlarged sectional view showing the fixing
structure 2 of the punching net fixing component of the third embodiment. The third
embodiment is a modification of the first embodiment or the second embodiment, and the same
reference numerals are given to the same configuration as the first embodiment or the second
embodiment and the description will be omitted.
[0038]
A speaker box (or speaker grille) 30 has a sound emission opening 30a formed in front of the
speaker unit 12 attached as shown in FIGS.
[0039]
Reference numeral 31 denotes a punching net fixing part, which has a cylindrical shape as shown
in FIGS. 6 and 7, the outer diameter of the cylinder is formed to fit into the opening 30a of the
speaker box 30, and the inner diameter 31a of the cylinder is punched The outer periphery of
the proximal end portion 17 a of the net 17 is formed to be engaged.
A plastic magnet member is used as a material of the punching net fixing part 31 and is formed
by resin molding processing or the like. The punching net fixing part 31 is inserted into the
opening 30a of the speaker box 30, and then fixed by an adhesive or the like.
[0040]
As described above, according to the third embodiment of the present invention, the punching
net fixing part 31 is fixed to the sound emitting opening 30a of the speaker box (or the speaker
grille) 30, and the base end of the punching net 17 is fixed. Since the outer periphery of 17a is
fixed by suction with the magnetic force of the punching net fixing part 31, the punching net 17
can be easily attached and detached and the punching net 17 can be attached and detached even
after the speaker unit 12 is assembled to the speaker box 30. .
[0041]
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In addition, as shown in FIG. 8, the end of punching net fixing part 31 is a groove 31c into which
the base end 17a of punching net 17 is loosely inserted, or the end of punching net fixing part
31 is shown in FIG. The base end face 17b of the punching net 17 adheres to the front face of the
opening edge 19b of the speaker frame 19 or the adhesion fixing of the edge 25 by extending
the contact face 31b with which the base end face 17b of the punching net 17 abuts. Direct
contact with the surface is avoided, and the fixing force of the punching net 17 is enhanced.
[0042]
In the present embodiment, a plastic magnet member is used as the material of the punching net
fixing part 31, but it is also possible to use a metal magnet member without being limited to this.
[0043]
It is front sectional drawing which shows the speaker unit of Example 1 of this invention.
FIG. 6 is an enlarged cross-sectional view showing components in the vicinity of the edge portion
of the speaker unit of Example 1;
FIG. 7 is an enlarged cross-sectional view showing a fixing structure that is partially different
from the punching net fixing component of the first embodiment.
FIG. 10 is an enlarged cross-sectional view showing components in the vicinity of the edge
portion of the speaker unit according to the second embodiment of the present invention. FIG. 14
is an enlarged cross-sectional view showing a fixing structure that is partially different from the
punching net fixing component of the second embodiment. It is front sectional drawing which
shows the speaker unit of Example 3 of this invention. FIG. 14 is an enlarged cross-sectional view
showing components in the vicinity of the edge portion of the speaker unit of Example 3; It is an
expanded sectional view showing fixed structure 1 of punching net fixed parts of Example 3. FIG.
It is an expanded sectional view showing fixed structure 2 of punching net fixed parts of Example
3. FIG. It is front sectional drawing which shows the speaker unit of background art. It is a crosssectional enlarged view which shows the component vicinity of the edge part of the speaker unit
of background art.
Explanation of sign
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[0044]
DESCRIPTION OF SYMBOLS 10, 11, 12 ... Speaker unit 15 ... Diaphragm 15a, 17a, 19a ... Base
end part 15b ... Opening front part 16, 25 ... Edge 16a, 25a ... Inner edge part 16b иии Outer
peripheral edge 17 иии Punching net 17b и и и Base end face 18, 26, 31 и и и Punching net fixing
parts 18a, 26a, 31c и и и 18b и и и inner peripheral edge portion 18c, 26b, 31b: Abutment surface
19: Speaker frame 19b: Opening edge 19c, 25c: Outer periphery 20: Magnetic circuit 20a: Pole
piece 20b: Plate 20c: Magnet 20d: voice coil 20e: bobbin 20f: upper end 20g: pole 21: damper
25b: outer edge 30: speaker box 0a иии opening 31a иии inner diameter
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