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JPH0715790

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH0715790
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
cone paper serving as a diaphragm of a cone speaker, and more particularly, the cone paper
comprises paper and a coating material, and a reinforcing structure is automatically provided in
the flat plate surface in the manufacturing process. Is a corn paper unit that can be spread
inexpensively while ensuring the functional characteristics of the diaphragm to be reliable, and
the strength is maintained despite the lightness of the vibration system. The present invention
relates to a reinforced corn paper unit having a reinforcing structure and a method of
manufacturing the same.
[0002]
2. Description of the Related Art A speaker is an apparatus for converting an electrical output
into mechanical kinetic energy to generate sound, and various types have been known
conventionally. Among them, there is known a type in which the function as a cone for directing
the vibration of sound in a certain direction and the function for causing the vibration of sound
by a conical cone paper is generally referred to as a cone speaker.
[0003]
In this cone-shaped speaker, the cone paper in the form of a tube has the role of directing and
vibrating the electrical output in a certain direction, so that its function acts as an absolute
element of sound generation in such a speaker, It is also very important as a low frequency
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speaker.
[0004]
And conventionally, it is known to produce such corn paper with paper material, and here, since
the final type should be produced with corn paper, it is producing with a molding frame from the
primitive material of paper.
[0005]
However, the production of corn paper from such paper material is relatively cumbersome and
expensive, and in particular the hardness of the paper material is limited and relatively high
output is required. An increase in the thickness of the paper material can not be avoided as a
speaker of the acoustic system (for example, in the case of the 400 W class, a thickness of about
3 to 4 mm was required).
[0006]
Also, as described above, when the thickness of the paper material increases, the delicate and
flexible vibration characteristics are degraded for a given output condition, and there is a limit to
the improvement of the sound condition (particularly the bass portion). There is also a problem
that it is weak to moisture and the like to cause its shape deformation and vibration
characteristic deterioration.
[0007]
On the other hand, in view of the disadvantageous characteristics of the paper material corn
paper as mentioned above, for example, the intrinsic weakness of the material, the remarkable
increase of thickness to suppress the divided vibration due to the increase of the output, the
point of being weak to moisture etc. It is known that a liquid crystal polymer (referred to as P
and P) of a synthetic resin material is molded into a cone paper shape.
[0008]
However, when using a liquid crystal polymer instead of paper, it is not possible to expect
flexibility and delicate vibration like paper material with the same thickness due to the
characteristics of the material itself, and especially deformation due to a thermal change above
normal temperature It often brought about, and the distortion phenomenon of the sound quality
by this was not avoided.
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[0009]
And, when such a speaker is mounted on a vehicle, the temperature in the room of the vehicle
often changes dramatically (sometimes it may rise to about 100 ° to 110 °), which causes the
speaker's thermal The deformation was exacerbated and, consequently, breakage of the corn
paper was also unavoidable.
[0010]
Therefore, due to the above-mentioned causes, there is a limit in improving the acoustic
characteristics of such corn paper, and its production is also relatively cumbersome and
unsuitable.
[0011]
SUMMARY OF THE INVENTION The object of the present invention is to improve the problems
of the prior art as described above and to provide a reinforced cone paper unit which can be
divided by relatively thin paper and a method of manufacturing the same.
[0012]
SUMMARY OF THE INVENTION In order to achieve the above object, a reinforced cone paper
unit having a reinforcing structure in a cone-shaped speaker according to the present invention
is a cone-shaped speaker cone paper made of a paper material as a base material. In the paper
sheet, the paper cone paper is characterized in that it is provided with a reinforcing blade portion
by folding in a longitudinal direction from a small diameter circle to an outer circle in the form of
a lapped tube, and a coating layer on the surface.
[0013]
For example, the reinforced cone paper unit has a circular shape when viewed from the front,
and the reinforcing blade portions formed thereon are composed of two or more symmetrical or
asymmetrical two or more in the vertical and horizontal directions.
Further, the reinforced cone paper unit has an elliptical shape when viewed from the front, and
the reinforcing blade portions formed on this are configured of two or more in number in the
upper and lower direction from the minor axis direction.
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[0014]
Further, a method for producing a reinforced cone paper unit having a reinforcing structure in a
cone-shaped speaker according to the present invention for achieving the above object is a
method for producing a cone-shaped speaker of a cone-shaped speaker from paper material A
first step of cutting a central folding line and a folding corn paper having at least one pair of
central symmetrical folding lines having a predetermined angle of symmetry at a predetermined
angle with respect to the central folding line, and the folding corn paper A second step of
mutually folding and bonding the central folding line and the central symmetrical folding line of
each other to form a reinforced blade portion, and a reinforced cone paper unit completed by
bonding with an adhesive member from the outside of the folded portion It has the 3rd process
of coating processing and manufacturing.
[0015]
[Operation] The reinforcing blade portion reinforces the paper cone paper to make the thin paper
paper cone paper a firm structure, and eliminates the divided vibration of the vibration medium
regardless of the output characteristics of the acoustic device or the acoustic strength. Achieve a
beautiful sound quality and improve the durability of the diaphragm.
Further, the reinforcing blade portion fixes a plurality of vibration operating points during threedimensional vibration of the adjacent surface divided by this, and improves the overall vibration
characteristics well, and the ordinary paper for the predetermined output cone paper The sound
quality is well improved by the delicate run-off characteristics of the paper material much
thinner than the thickness of the corn paper and the fixed vibration characteristics.
[0016]
In addition, corn paper is basically manufactured from paper material, and the reinforcing blade
portion is manufactured by folding and bonding the paper material, which enables inexpensive
manufacture.
[0017]
The coating layer protects the paper material from moisture and the like and also increases its
durability.
[0018]
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Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a reinforced cone paper unit according to an embodiment of the
present invention, and FIG. 2 is a cross-sectional view of the main part thereof.
[0019]
As shown in FIG. 1 and FIG. 2, the coated folded corn paper 11 has a rafter-tube shape, and a
reinforced blade portion which is folded in a longitudinal direction from a small diameter circle
to an outer circle at a predetermined portion of the inner wall surface. a is formed symmetrically.
In the case of circular cone paper when viewed from the front as shown in the illustrated
example, it is preferable that four reinforcing blade portions a be provided symmetrically in the
vertical and horizontal directions at an angular interval of 90 ° in the circumferential direction.
The invention is not limited to this number.
Also, in some cases, they may be provided asymmetrically.
The folding direction of the reinforcing blade portion a may be formed on the front or back
(bottom) so that it can be selected according to the mechanical structure.
[0020]
An explanatory view of a method of manufacturing such a circular reinforced cone paper is
shown in FIG.
The same figure (A) is a top view of the shape ¦ molded folded corn paper, and the same figure
(B) is a top view of the folded folded corn paper.
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[0021]
Here, first, the process of manufacturing the folded corn paper 11 of the reinforced corn paper
unit 1 is performed.
That is, assuming that four reinforcing blade portions a are provided symmetrically at an angular
interval of 90 ° in the circumferential direction on the paper material of the folded cone paper
11 in the first step, the radial direction from the central portion is 4 at equal angular intervals. A
central folding line 11a is provided, and a pair of central symmetrical folding lines 11b and 11c
are formed at a predetermined angle from the central side toward the outer edge with reference
to the respective central folding lines 11a.
Further, in the figure, 12 is an adhesive layer, and 13 is a coating layer.
[0022]
The molding of such folding lines 11a to 11c can form its boundary at one time using a mold
with a conventional simple pressing means (see FIG. 3A).
Then, the folded corn paper 11 manufactured in the first step is folded or manually folded at the
central symmetrical folding lines 11b and 11c symmetrical with respect to the central folding
line 11a by an automatic processor. The object is completed in the second step (see FIG. 3B) and
the third step in which the coating process and the like after the second step are performed.
[0023]
Further, the adhesive layer 12 (dot display portion in FIG. 3A) folded by the central folding line
11a and the central symmetrical folding lines 11b and 11c directly forms the reinforcing edge
portion a.
[0024]
Alternatively, a reinforced cone paper unit can be manufactured by separately manufacturing a
reinforcing blade a on an existing conical cone and attaching it with an adhesive or the like.
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[0025]
On the other hand, FIG. 4 relates to another embodiment of the present invention, wherein FIG. 4
(A) is a plan view of a molded oval folded cone paper, and FIG. 4 (B) is a folded oval folded corn
paper It is a top view.
Although the embodiment described above is applied to a circular speaker cone paper when
viewed from the front, the example of FIG. 4 is directed to an elliptical speaker when viewed from
the front.
[0026]
Here, the manufacturing process for forming the reinforcing blade portion a is basically the same
as the circular case described above, except that the form of the base material conforms to the
elliptical reinforcing cone paper unit 2 and the folding cone paper 11 is elliptical The ellipticallyfolded corn paper 11 is cut into a shape, and is different in that the central folding line 11a and
the central symmetrical folding lines 11b and 11c are provided on the short axis portion in upper
and lower symmetry.
[0027]
Although two reinforcing blade portions a are provided in the elliptical example, it is a matter of
course that the present invention is not limited to this number.
[0028]
Since the reinforced cone paper units 1 and 2 of this configuration and manufacturing method
are manufactured by molding a relatively thin paper as a base material, they have a plurality of
reinforcing blade portions a in the short axis direction of the inner peripheral wall of the tube
shape. By eliminating the divided vibration of the vibration medium regardless of the size of the
output characteristics of the sound device or the strength of the sound, a clean sound quality is
achieved, and the durability of the diaphragm is improved.
[0029]
Then, the reinforcing blade portion a fixes a plurality of vibration operating points at the time of
three-dimensional vibration of the adjacent surface divided by this, and improves the overall
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vibration characteristics well, and the ordinary paper for the predetermined output cone paper
The sound quality is well improved by the delicate run-off characteristics of the paper material
much thinner than the thickness of the corn paper and the fixed vibration characteristics.
[0030]
In addition, since the manufacturing method is performed by an operation of automatically
cutting a simple paper material while providing a folding line, simply folding it, bonding it, and
coating it, the process is easy, and the manufacturing cost of the article is reduced. Can be
[0031]
In addition, since the corn paper of the paper material is coated, it is resistant to moisture and
the like, and its durability is also increased.
The present invention is a functional product of such an article by maintaining the reinforced
reinforcing blade portion structure automatically in its final object while the cone paper of the
cone-shaped speaker is easily manufactured and treated with paper material. It offers good
characteristics and has the possible feature of low cost spread due to its ease of fabrication.
[0032]
As described above, according to the present invention, as described in detail with reference to
the examples, the reinforcing paper by folding is formed on the cone paper of paper material and
the coating layer is provided on the surface, so that the comparison is made. Thin paper material
can make the cone paper a solid structure, eliminate the split vibration of the vibration medium
regardless of the output characteristics of the acoustic equipment or the sound strength to
achieve a clean sound quality, and the durability of the diaphragm Can be good.
In addition, the reinforcing blade portion fixes a plurality of vibration operating points during
three-dimensional vibration of the adjacent surface divided thereby, and improves the overall
vibration characteristics well, and a normal cone for a predetermined output cone paper The
sound quality is well improved by the delicate run-off characteristics of the paper material much
thinner than the thickness of the paper and the fixed vibration characteristics.
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[0033]
Further, since the corn paper is basically manufactured from a paper material and the reinforcing
blade portion is manufactured by folding and bonding the paper material, the whole can be
manufactured inexpensively.
Furthermore, the coating layer protects the paper material from moisture and the like, and has
the effect of increasing its durability.
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