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DESCRIPTION JP2001036983

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2001036983
[0001]
TECHNICAL FIELD The present invention covers a speaker surface to protect various members
such as an internal diaphragm, etc., and also to decorate the speaker to enhance the commercial
value of the speaker. For protective covers.
[0002]
2. Description of the Related Art Loudspeakers used for the output of various audio equipment
are not only required to output high-quality sound, but are often installed in the area visible to
the user. , Its decorativeness is a very important requirement as a speaker. Therefore, the speaker
protective cover provided for protecting a member such as a diaphragm provided inside the
speaker is a member most visible to the human eye, especially for a member that covers the
upper surface of the speaker, and enhances its decorativeness Is an important factor to increase
the commercial value of speakers.
[0003]
Various types of protective covers have conventionally been used as such speaker protective
covers, and there are, for example, those shown in FIG. The speaker cover will be described
together with the structure of the speaker disposed therein. The magnet 42 is housed in the
magnet housing portion in the frame 41, the upper yoke plate 43 is in the upper portion, and the
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lower yoke is in the lower portion. A plate 44 is provided. The magnet 42 has magnetic
anisotropy in the vertical direction in the drawing, and for example, the upper side is an N pole
and the lower side is an S pole. A ring-shaped outer yoke 45 is provided with a gap between the
upper yoke plate 43 and the lower yoke plate 44, and the gap between the two forms a magnetic
gap G.
[0004]
The outer periphery of the deformation joint 47 bent in a U-shape is fixed to the support portion
46 formed at the upper end of the frame 41, and the outer periphery of the diaphragm 48 is
connected to the inner periphery of the deformation joint 47 There is. A bobbin 50 is fixed to the
back surface of the diaphragm 48, and is movable up and down in the magnetic gap G, and a coil
51 is wound around the magnetic gap G. The periphery of the bobbin 50 is guided for vertical
movement by the damper 52, whereby the fixed magnet 42 and the yokes 43 and 44 are
provided when an audio current is supplied to the coil 51 from an external output line (not
shown). The coil 51 moves up and down by the action of magnetic lines of force, and the
diaphragm 48 vibrates to output a sound.
[0005]
A main body case 53 having a locking portion 39 is fixed to the outer periphery of a frame 41
incorporating such an audio output mechanism. A cover locking receiving portion 54 is formed
on the upper inner periphery of the main body case 53, and a ring fitting portion 55 is formed on
the outer peripheral upper portion. The protective cover 57 disposed to cover the upper portion
of the diaphragm 48 has a mesh-like portion 49 in which a large number of small holes 56 are
bored, and the central portion thereof is a projecting surface curved toward the front side of the
speaker 40 An engagement portion 58 bent downward is formed on the outer periphery thereof,
and the engagement portion 58 is fitted and fixed to the cover engagement receiving portion 54
of the main body case 53. A diamond cut ring 61 having a decorative diamond cut surface 60
formed on the outer peripheral surface thereof is fitted to a ring fitting portion 55 formed in the
main body case 53 and fixed by an adhesive or the like.
[0006]
In assembling the speaker 40 having such a structure, as shown in FIG. 6, the main body 62
composed of the frame 41 housing the audio output mechanism and the main body case 53 on
the outer periphery is The protective cover 57 and the diamond cut ring 61 are integrated by
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being fitted and fixed to the respective fitting portions.
[0007]
In the conventional speaker 40 having the above structure, the protective cover 57 for protecting
the sound output mechanism inside the speaker is to some extent so that the diaphragm 48 and
the like are not damaged even if various objects from the outside collide with each other. It is
required to have a thickness and shape that can obtain the strength of the above, and is made of
a material that does not cause a magnetic flux leakage to the internal magnetic circuit, and the
output sound from the diaphragm 48 smoothly goes out. In order to be able to do so, a large
number of small holes 56 are formed, and further, a function that does not impair the aesthetic
appearance as a member constituting the front portion of the speaker is required.
[0008]
Therefore, the whole of the protective cover 57 is a nonmagnetic plate such as an aluminum
plate, and a large number of small holes 56 are formed by punching to form a net, which is
punched to a predetermined size, as shown in FIG. As the cross section is shown, the center
portion is provided with a protruding surface 49 which is curved outward, and is press-formed so
that the engaging portion 58 is formed at the periphery.
The surface of this aluminum plate is black anodized or black painted to make the whole black,
enhancing the appearance.
[0009]
On the other hand, the diamond cut ring 61 polishes the surface of the aluminum plate to form a
glossy surface to form a diamond cut surface, and this is a ring fitting portion provided on the
upper outer periphery of the main body case 53 as described above. The upper end face 64 is
fitted on the upper end portion 65 of the main body case 52.
Since this diamond cut ring 61 is provided particularly for decoration, and such a glossy surface
can not be formed on the surface when the frame 41 is made of resin, such a diamond cut ring
61 is provided. There is a need. Also, it is conceivable to form the frame 41 with metal and form
such a glossy surface on the surface, but if it is formed into a shape having fine irregularities as
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described above with metal, it will be expensive. Therefore, the above-mentioned diamond cut
ring 61 is provided for the reason that it is cheaper to use a decorative member separately.
[0010]
The loudspeaker thus assembled is shown in a plan view in FIG. 7 and in a side view in FIG. 8,
and is a net-like portion having a large number of small holes 56 formed entirely in the center as
shown in FIG. Since there is a protective cover 57 having a 49 and a diamond cut ring 61 having
a gloss on which a diamond cut surface is formed on the outer periphery thereof, the change in
the color of the two makes the speaker excellent in appearance. In the illustrated embodiment,
the protective cover 57 is provided with the flat plate portion 66 not having the small hole 56,
and the decorative character portion 67 displaying the manufacturer name etc. is provided on
this portion by press molding or the like. It has a glossy surface and improves the appearance
more.
[0011]
SUMMARY OF THE INVENTION In the above-mentioned conventional speaker, although the
speaker having an excellent appearance is made by the black protective cover 57 at the central
portion and the diamond cut ring 61 provided around it, this means In addition to the protective
cover 57, the diamond cut ring 61 for decoration is further used as a separate member, and for
example, the number of parts is increased compared to the case of only one protective cover,
which makes the assembly expensive. In addition, there is no choice but to increase the cost of
parts management.
[0012]
Therefore, the main object of the present invention is to provide a protective cover for a speaker
which has good decorativeness, has a small number of parts, is easy to assemble, and can be
made inexpensive.
[0013]
[Means for Solving the Problems] In order to solve the above-mentioned problems, the present
invention solves the above problems by providing a net-like portion having a large number of
small holes, a ring-like recess formed on the outer periphery of the net-like portion, and the
recess. And a decorative part having a surface as a decorative surface on the outer periphery of
the speaker cover.
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[0014]
Further, an outer peripheral edge of the mesh-like portion is present in the recess, and a lower
end of the recess is configured to press the upper surface of the diaphragm outer peripheral
support member. Moreover, the aluminum plate which carried out the coloring process of the
surface is press-formed, and a decoration part is grind | polished and it is set as the diamond cut
surface.
[0015]
DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be
described with reference to the drawings.
FIG. 1 is a sectional view showing the whole of a speaker provided with a speaker protective
cover according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view, and
FIG. 4 is an exploded side view.
The sound output mechanism of this speaker is the same as that of the conventional one shown
in FIG. 5, so its detailed description will be omitted, and the outline will be described. 3 and 4,
and the outer yoke 5 is fixed with the magnetic gap G and the periphery of both yokes.
The outer periphery of the deformation bonding portion 7 is fixed to the support portion 6 of the
frame 1, and the outer periphery of the diaphragm 8 is fixed to the inner periphery of the
deformation bonding portion 7.
That is, the deformation bonding portion 7 functions as a diaphragm outer periphery supporting
member. Coils 11 and 11 are wound around the outer periphery of a bobbin 10 provided on the
back surface of the diaphragm 8, and the coils 11 and 11 are disposed in the magnetic gap G.
When an audio current is supplied to the coils 11, 11, the coils 11, 11 move up and down by the
action of magnetic lines of force by the fixed magnet 2 and the yokes 3, 4 to vibrate the
diaphragm 8 to perform audio output. . The code | symbol 25 is a damper which supports the
bobbin 10 movably to an up-down direction.
[0016]
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A main body case 12 having a locking portion 14 is locked and fixed to the outer periphery of
the frame 1 incorporating such an audio output mechanism, and a ring fitting portion 15 is
formed on the outer peripheral upper portion of the main body case 12. Form. The protective
cover 16 covering the upper surface portion of the diaphragm 8 is formed of a plate of aluminum
material whose surface is black-alumite-treated, and the central portion thereof is a net-like
portion 9 in which a large number of small holes 19 are formed. The central portion is a
projecting surface that curves to the front side. A ring-shaped recess 17 continuously formed in a
U-shaped groove shape around the mesh-like portion 9 is provided, and the edge of the mesh-like
portion 9 in which the small hole 19 is drilled is located in the recess 17 ing. The lower end of
the recess 17 holds the upper surface of the deformation joint 7 as a support member for
supporting the peripheral edge of the diaphragm 8, and the deformation joint 7 is fixed to the
support 6 formed at the upper end of the frame 1 by bonding or the like. The depth of the recess
17 is set so that it can be prevented from peeling off by vibration.
[0017]
A curved decorative portion 20 is continuously provided on the outer periphery of the concave
portion 17, and the surface of the decorative portion 20 is ground so that the black portion of
the black alumite is scraped off and has a gloss, and a diamond cut is made. It is considered a
face. The decorative portion 20 is fitted to a ring fitting portion 15 formed on the upper outer
periphery of the main body case 12 and fixed by an adhesive or the like, and the surface thereof
is flush with the outer peripheral surface of the main body case 12. The diamond cut surface
formed on the surface of the decorative portion 20 may be formed, for example, only in the
upper part or only in the lower part, and in a number of rings other than formed on the entire
surface of the portion located on the outer periphery You can also.
[0018]
In the illustrated embodiment, as shown in FIG. 2, the protective cover 16 is provided with a flat
plate portion 22 in which the small hole 19 is not formed, and a decoration in which the
manufacturer name etc. are displayed by press molding or the like. The character portion 23 is
made to project, and the upper surface of the decorative character portion 23 is polished to form
a glossy surface, thereby improving the aesthetic appearance and omitting the fixing operation of
the name plate to improve the assemblability.
[0019]
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Further, when assembling this speaker, as shown in FIG. 4, only one protective cover 16 of the
above construction is provided for the main body case 12 fixed to the outer periphery of the
frame housing the audio output mechanism inside. By covering it, it is integrated as shown in FIG.
3, and the number of assembling steps can be reduced as compared with the conventional one
shown in FIG.
Further, as shown in FIGS. 2 and 3, in the appearance in the assembled state, there is a net-like
portion 9 which is entirely black and has a large number of small holes 19 formed in its central
portion. Thus, the decorative portion 20 having the glossiness is present, and the speaker has an
excellent appearance as in the prior art. The protective cover 16 is not limited to black, and can
be colored in various colors in accordance with alumite treatment. Further, the coloring method
is not limited to the alumite treatment, and means such as painting may be used.
[0020]
Further, since the outer edge of the net-like portion 9 is positioned in the recess 17 between
them, the shape of the small hole 19 is deformed when the recess 17 is drawn, and the
appearance is deteriorated. The outer edge of the net-like portion 9 is hidden in the recess 17 so
that the protective cover 16 can have a good appearance as a whole. Further, the lower surface
of the concave portion 17 can be set to press the upper surface of the deformation bonding
portion 7 as the diaphragm outer peripheral support member so that the diaphragm 8 can be
reliably held. It can be used in the embodiment.
[0021]
As described above, according to the present invention, the surface of the reticulated portion
having a large number of small holes, the ring-shaped recess formed on the outer periphery of
the reticulated portion, and the outer periphery of the recess are decorated. Since the speaker
protective cover is provided with the decorative portion as a face, it is possible to form the
protective portion inside the speaker and the decorative portion around the same with one
member, in which case the both portions are formed by the concave portion located between
them. Boundary between the mesh and the decorative property is improved, and by providing the
recess, by positioning the outer peripheral edge of the mesh portion in the recess, the portion
where the small hole is formed and the portion where the small hole is not formed The regular
boundary can be made invisible from the outside, the appearance can be improved, or the upper
end of the diaphragm outer peripheral support member can be pressed by the lower end of the
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recess to hold the diaphragm reliably. Etc. so that it is collected by, it is possible to take various
aspects.
[0022]
Further, in the case where an aluminum plate whose surface is colored by alumite treatment or
the like is press-formed and the decorative portion is polished to make a diamond cut surface, the
color of the mesh portion and the diamond cut of the decorative portion are applied. It is possible
to easily manufacture a protective cover excellent in aesthetics with a clear contrast between the
both (surface color of aluminum).
[0023]
Brief description of the drawings
[0024]
1 is a cross-sectional view of an embodiment of the present invention.
[0025]
2 is a plan view of the same.
[0026]
3 is a side view of the same.
[0027]
4 is a side view of the same disassembled state.
[0028]
5 is a cross-sectional view of the conventional example.
[0029]
6 is a side view of the exploded state of the conventional example.
[0030]
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7 is a plan view of the conventional example.
[0031]
8 is a side view of the conventional example.
[0032]
Explanation of sign
[0033]
Reference Signs List 1 frame 2 magnet 7 deformation joint 8 diaphragm 9 mesh-like portion 11
coil 12 main body case 16 protective cover 17 concave portion 19 small hole 20 decorative
portion
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