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JPS5429626

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DESCRIPTION JPS5429626
Specification / Name of Invention Speaker
2, the scope of claims
3. Detailed Description of the Invention The present invention relates to a speaker capable of
reproducing sound from low frequencies to high frequencies uniformly and without distortion
even for large inputs. The conventional corn speaker is a diaphragm that is made of a mixture of
wood, pulp, hemp, cotton, wool, and so on, melted in water, and cut into pieces. Non-press cones
dried and molded, and press cones molded by heating the mold and applying pressure are often
used. However, non-press cones may have the diaphragm surface evenly spaced to a uniform
thickness. It is difficult, locally thick and thin parts occur, and the uniformity of the diaphragm
itself is not good, and when the pressure of the diaphragm surface is pressed, the stretched and
compressed parts of the paper white body are inside. The remaining distortion is a subtle
influence on the sound quality to be reproduced, which often causes an impure sound. On the
other hand, when the diaphragm is formed into a flat cone whose cross section is linear,
EndPage: 1 is likely to produce an offensive peak sound at high frequencies, and a paracorn or a
curved cone whose plate surface is curved is Because the diaphragm bends like a bow at the time
of acoustic re-production and distortion occurs in the diaphragm itself, there is a tendency to be
accompanied by impure sound with a dull feeling over the entire reproduction frequency range,
especially when large input is received Sometimes the dog became angry and sometimes the
diaphragm was broken and hesitating. Therefore, it is proposed to press the diaphragm to
alternately arrange the flat part and the curved part or to provide ribs on the diaphragm, etc.
Either one diaphragm is processed and pressed. It seems that the paper itself does not have
uniformity or internal distortion as described above, and does not produce the expected effect
because the paper is made as it is. In view of the above, the present invention relates to a speaker
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in which a plurality of vibrating parts are made of paper, fiber or other diaphragm material
having excellent acoustic characteristics, and these are combined appropriately to form a
diaphragm, each of which fibers Various directions are combined to cancel out the acoustic
distortion due to fiber orientation deviation, to avoid unnatural 'peaks, to have flat frequency
characteristics from low frequency to high frequency, and to accompany press forming The
present invention provides a speaker that can be used for large inputs without mechanical
internal distortion. The present invention will be described with the following examples. 1 and 2
show a front view and a sectional view of a speaker according to the present invention. The drive
unit and the suspension system may be of any type, but as shown in the figure, the outer
periphery of the diaphragm (1) is connected to the frame (3) via the edge (2) and the top is a
voice coil It is connected to the wound bobbin (5) of (4).
The voice coil is fitted in the air gap provided in the middle of the magnetic path consisting of the
yoke (6), the magnet ('7) and the pole piece (8), so that the voice coil moves at the correct
position in the air gap. In the case shown, the bobbin is held by a yarn suspension damper (9). A
cap (10) having a spherical shape or a conical shape is attached to the central portion of the
diaphragm. The diaphragm (1) is composed of a vibrating part (11), which is made of both sheets
in the figure shown, but other leaks of air are small and uniform such as durable, hard to deform
Japanese paper, fibers, etc. The shape can be selected appropriately from materials, and the
shapes thereof are opposite sides (12) and (11 is an arc-shaped side, one of the arc-shaped sides
is larger than the other, and both arc-shaped sides are connected (il 1 side (] 4 The straight side
is formed into a fan shape (FIG. 3), and the fiber directions are variously combined so that the
straight ridges are joined sequentially to form a conical flat diaphragm. ing. In addition, as shown
in FIG. 4, the side may be curved, and as shown in FIG. 5D, the diaphragm may be formed or
other various shapes. In the case shown in the figure, the joining of each vibrating piece is
carried out by using the bonding surface as a part of the surface which becomes the front and
the back surface along the side of one vibrating piece as shown in FIG. It is stuck with an
adhesive agent next time. In addition, 而 or。 will be along the side of one vibrating piece. Attach
a part of the surface to be the back as an adhesive surface and then bond with an adhesive (Fig.
7) or affix the adjacent vibrating pieces and stick them to the strip (15) that joins them together
EndPage : (2) (Fig. 8) (Fig. 9) The side of the adjacent vibrating piece is inclined in the thickness
direction, or a part of the thickness is cut off and the parts are adhered to each other (Fig. 10),
(Fig. 11), the thickness of one of the vibrating pieces is split into two, and the adhesive and the
other vibrating part side are wound between them (Fig. 32); Can be sewn together, filled with an
adhesive at the seam, etc. The vibrating pieces may be spliced with a double-sided adhesive tape
or a single-sided adhesive tape, instead of the bonding agent or strip of the joining method
shown in FIGS. When the speaker of the present invention configured as described above is
sounded, a peak with high frequency is not generated, and a natural sound with no peculiarity is
reproduced, and the rigidity of the diaphragm is made by the joint portion of each vibrating
portion. It is possible to suppress the bowing of the additional diaphragm and bow to a large
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input. In the above embodiment, the vibrating pieces are joined so that the cross-sectional shape
of the vibrating plate becomes flat as shown in FIG. 2, but the vibrating pieces may be joined so
as to form a paracon.
The strips (15) in Figs. 8 and 9 may be made of paper, fiber, plastic, etc., and their thickness may
be changed appropriately according to the application, for example, a speaker having a small
allowable input. If the thickness of this strip is relatively thin and the diaphragm is made easy to
move with a small input, in the case of a speaker with a large allowable input, the stiffness of the
diaphragm is increased as a thick strip and the larger input It can also be made more tolerable.
The diaphragm can be formed by alternately arranging vibrating pieces made of thick paper and
thin paper, or combining vibrating pieces made of paper of different densities, and still different
materials such as paper and fiber. ...-Can be formed by combining vibrating pieces made of-, or
by combining thick paper and thin phi-vibrating pieces, and in this way there is a change of f% A
speaker is obtained. The adhesive for joining the vibrating pieces is preferably a highly adhesive
material such as a urea-melamine resin system rather than a highly flexible one such as a rubber
system. The diaphragm formed in this way is coated with an adhesive on a lighter or lighter
internal substance of the foamy crow or pumice sand and a large internal loss and no
hygroscopicity as required on a part or the whole of the surface. Sometimes. Pieces to be
vibrating parts are combined in advance by combining their fiber directions to form a sheet, a
shape to be a diaphragm is cut out from this, and both ends are adhered to form a diaphragm.
You can also
Brief Description of the Drawings FIG. 1 shows an embodiment of the present invention, FIG. 1 is
a front view, FIG. 2 is a cross-sectional view taken along the line of FIG. 1 and FIG. FIG. 4 is a
front view showing another shape of the vibrating part, FIG. 5 is a front view of a speaker having
a diaphragm composed of the vibrating part shown in FIG. 4, FIGS. 6 to 12 The figure is an end
view showing the joining of each vibrating piece. Patent Applicant Chrysler Electric Co. '1. Attorney Dominance F. Shishii,-1-: lj, cause i,-,-EndPage: 3
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