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Patent Office Secretary 1, Title of Invention 3, Patent Assignee Address, 10, Hanazono Dodocho,
Ukyo-ku, Kyoto City Name (294) Tateishi Electric Co., Ltd. Representative Tateishi-Shin 4 Agent 64Eu 50 published by Japan. (1976) e, 4 internal reference number 7 <l (, l, fl specification 1,
title of the invention 1, title of the invention uI electronic speaker
2, inventor
3. Detailed Description of the Invention The present invention relates to an improvement of an
electrodynamic speaker, and more particularly to an electrodynamic speaker having a thinly
laminated and lightened voice film. A conventional speaker is by passing an audio current to a
voice fill placed in a narrow gap. The voice coil vibrates in the direction perpendicular to the
magnetic field, and the vibration is transmitted to the diaphragm fixed to the voice coil to obtain
the sound pressure. In the case of this structure, the frequency characteristics become large and
constant due to the mass, compliance, stiffness, etc. of the mechanical system, and the
improvement of the frequency characteristics is appreciable in the inventory even if 5 parts are
improved. is there. Furthermore, in order to obtain high magnetic density, the gap is made small,
and the fixation of the edge (:: 7-n grit peripheral part) is very h laborious and has to be relied
upon by one person, so it is mechanized. It is poor in mass productivity. Also, the voice coil needs
to be wound in order and in close contact, and the number of processes is very large. In order to
extract these, an electric type loudspeaker has been developed for the improvement of the
material of the single magnetic circuit and the weight reduction of the vibration system. This is a
structure in which a single turn of print-il is laminated as a voice coil on a flat plate-like
diaphragm by means of predetermined re-stacking, etching or the like, and a narrow gap is
applied to the permanent magnet. have. By passing an audio current to this, the 1st repulsion
force between the permanent magnet and the permanent magnet acts, the voice coil vibrates, and
eventually the diaphragm vibrates. However, these p methods are also insufficient in terms of 1
weight, cost of coil and number of lamination steps. EndPage: The present invention has been
made to overcome the above-mentioned drawbacks, and by forming a large number of voice coils
on a lithographic diaphragm by ion implantation, the coil portion can be made smaller and
lighter. It is an object of the present invention to provide an electrodynamic speaker with low
cost and improved frequency characteristics. According to the present invention, since the voice
coil is manufactured by the ion implantation method in order to achieve this object, the thickness
between the layers on the order of 91 microns can be realized by adjusting the implantation mk
+ energy. Therefore, the coil height is extremely lowered and the weight reduction of the
effective quality of the coil portion can be reduced, so that the size of the air flow circuit can be
reduced. Moreover, since the diaphragm can be processed even if it is very thin In the case of
light mass t! The I-plate can be used to significantly improve the high frequency characteristics.
An embodiment of the present invention will be described below with reference to the drawings.
1 shows an all-electric type speaker, FIG. 2 shows a diaphragm and a voice coil, and FIG. 3 is an
enlarged view of a cross section of a voice coil portion. Q (8) As shown in FIG. First, ions of a
metal (eg, silver, copper, aluminum, etc.) to be the conductive band 6 are implanted by the ion
implantation method.
Next, delay time and implant ions of insulator 5 (for example, silicon) in a manner to chase after.
When the moving plate is formed of, for example, a conductive thin film such as T (, Bg, hard AX,
etc., the insulator 5 is driven first, and the conductive band 6 is driven so as to follow. During
these operations, the diaphragm is rotated at the speed of the foot. Alternatively, the ion
implantation side can be rotated, and the conductor 6 will be formed on the previously implanted
insulator 5 after one turn. The conductive band 6 and the insulator 5 may be formed in a spiral
shape by carrying out the process, and the implantation may be completed with the required
number of turns. Thus, the target Novo voice coil 2 is formed 5τ. Also, the lead wire 4 from the
voice coil to the external terminal may be formed in a similar manner by ion implantation in the
same manner as above. By forming the lead wire like a weir, (4) In the prior art, it is possible to
prevent the breakage of the lead wire which has been caused by passing the lead wire from the
external end and element to the coil moving element via the diaphragm. Since it does not matter
whether the material lJ'tIfi, it can be said that anything such as paper, metal, polymer film, etc.
may be used. Furthermore, if a voice film is formed by ion implantation, the diaphragm does not
have to be flat, and the sound pressure directivity can be improved by, for example, forming it
into a spherical shape. Although the present invention has been described with reference to the
drawings in connection with one embodiment, the present invention is not limited to the above
embodiment, and it is needless to say that changes can be made vigorously in the S sequence
without changing the gist. For example, although the voice; yl is circular in the above, it may be
square or may be distributed over the entire diaphragm.
4. Brief description of the drawings. FIG. 1 shows an electrodynamic speaker, FIG. 2 is a
diaphragm and a voice coil, and FIG. 3 is an enlarged view of a cross section of a voice fill unit. 1 ·
· · Diaphragm 2 · · · · Voice coil 3 · · · · · · Permanent magnet 4 · · · · Lead wire 5 · · · · · · · · · · · · · · · · ·
Leading band EndPage: 2 Agent other than the above EndPage: 3
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