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JPS5298434

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DESCRIPTION JPS5298434
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a conventional
flat plate type electro-acoustic transducer, and FIG. 2 is a side cross sectional view showing one
embodiment of the flat plate type electro-acoustic transducer according to the present invention.
FIG. 3 is a view illustrating the details of the conductor pattern in the diaphragm of FIG. 2, and
FIGS. 4a, 4b and 4c are cutaway sectional views of the main part showing a specific example of
conductor pattern formation in the same manner. . 21.22 · · · · · · · · · · · · · · · · 23 · · · 231 insulator
base, 232, 233 · · · conductor pattern.
DETAILED DESCRIPTION OF THE INVENTION This invention relates to a flat plate electroacoustic transducer, and in particular to the improvement of its vibration &. In recent years, the
entire diaphragm can be uniformly vibrated as compared with the conventional electro-acoustic
transducer, thereby enabling reproduction with an ideal perfect piston vibration, such as flat
speakers, headphones, microphones, etc. An acoustic transducer is employed. That is, this flatplate electro-acoustic transducer has predetermined rights as shown in FIG. 1 and is synthesized
between a large pair of 106 stones 11.12. A) Storage] A predetermined coiled conductor pattern
132 is provided on -m1lli with a resin film 131 as a base, and a plate 1 for vibration detection is
disposed. Then, by applying a current of, for example, the wrong year to the conductor pattern
132 of the diaphragm 13 in the magnetic field as indicated by the broken line generated by the
magnet 11.12, the force based on the law of + Pattern I,? The valve is turned to 2 and this force
V causes the whole of the freeze 8 + 13 to vibrate. By the way, in the above, the plate a is
provided with a conductor pattern on one surface side of the insulator base, and there is a gap d
in performance because the balance of the vibrating yarn is bad. Also, if the coiled part of the
conductor pattern is directed from the outside to the central force direction, the pole must be
derived from the center of the egg 1: collection as well, so the center used for this purpose. There
is a drawback that the vibration is likely to be divided on the diaphragm due to the hold. In view
of the above-mentioned problems, the present invention is made in the light of the above-
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mentioned problems, and it is extremely good to be improved and be equipped with a vibration
isolation plate so that it can be removed easily and reliably with the above problems and
drawbacks. It is intended to provide a flat plate electro-acoustic transducer. The drawings will be
described in detail below with reference to an embodiment of the present invention. That is, as
shown in FIG. 2, an insulator such as a synthetic resin film is used as a base 231 between a pair
of magnets 21 and 22 having a predetermined polarity, and desired conductor patterns 212 and
133 are formed on both sides of the lever. Distribute the drill "] 1". Here, as shown in FIG. 3, the
conductor pattern / z sz, x ss in the a motion plate 1 is spirally shaped such that one 232 goes
from the outer periphery toward the central force, and the other 233 is opposite to this. The
central portion of both the four turtle pattern 232. 113 penetrates the surface of the insulator
base 231, and the central portion of the two turtle patterns 232. 113 penetrates the surface of
the insulator base 231. To be conducted.
In addition, in Fig. 3, for convenience, both conductor patterns 1 · 13 stone; · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2 It is formed such that the winding direction is
reversed several times in accordance with the distribution pattern of the magnetic field. Then, 76
(, z +) A ′ ′ ′ ′ is made to be a desired conductor pattern on both sides of the conductor
pattern 232.233 1d insulator pace 23I of the diaphragm 23. 1″fhm″″4’Adt、、、。
The appropriate coating method I of the temple formed, Zhong Yu 2 ",. The conduction on the
front and back in the upper part may be made by the through hole plating method or the
equivalent method. However, the coating method has a limit to the distance required to obtain a
certain pattern of wrinkles, and as a result, the number of turns per unit diameter is increased
accordingly. There is a problem in the efficiency as a vibration system to be obtained. Therefore,
if the efficiency of a more noble vibration system is desired, the coating method as described
above ((by far more winding numbers per unit area can be obtained by winding in spirals using
thin conductors) Therefore, it is possible to drive a photographing system with high efficiency by
supplying a large amount of current to the unit area 1 area. Fig. 4 (a), (b) and (C) show a specific
example in the case of realizing a desired conductor pattern using such thin wires, and (a) is
spirally wound. (B) and (C) are insulators such as films made of synthetic resin on one side or
both sides of the book formed by (,). This is an example in which the strength stability is
increased by deposition. Here, as a matter of course, the adhesive 25 and the insulator 26 are
required to be nonmagnetic materials, and in FIG. 4 (a), (b) and (0), the conductor corresponding
to the one surface side is all required. Although only the body pattern is shown, it is possible to
form a conductor pattern corresponding to the both thiIl by stacking them ηL1. Even in this
case, in order to make the central part of each conductor pattern 4111 I, it is possible to use
even the same fineness resistance, or to use a different @ wire to stack one. You should be able to
connect at the time of the cat. Therefore, as described above, the insulator pace 231 both '1,-。.
The diaphragm 23 made of a ring of conductor butter 7232.233 which is made with a pattern of
a foot on the side of 4 '向 P and a portion of which is made in a four-to-one relationship as in the
prior art is one side as in the prior art. The number of turns per unit area is doubled as compared
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with a diaphragm having a conductor pattern only.
The electric-to-derivative converter of this study, which is equipped with such a vibration plate
23, can improve the efficiency of the vibration system, and if it is superior to a woman, it will be
well-balanced to improve its performance. Also, even if the coiled part of the four turtle pattern is
directed from the external application toward the center, ・ and bow, the electrodes are not
drawn out from the central part in a similar manner, as in the prior art. The center hold can be
praised, and the diaphragm can be shared with the audience as much as possible. Therefore, as
described above, according to the present invention, a very good flat-shaped electric-resonance
comprising an improved diaphragm so as to simplify and reliably remove one point or defect
conventionally. It is possible to provide a converter. Note that the present invention is not limited
to the above-described nine back examples, and various modifications can of course be made
without departing from the scope of the present invention.
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