close

Вход

Забыли?

вход по аккаунту

?

JPH01255398

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH01255398
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
underwater acoustic device, and more particularly to an acoustic device such as an underwater
microphone and an underwater speaker having a vibrating portion. More particularly, the
present invention relates to an acoustic device such as a speaker or a microphone capable of
efficiently emitting or recovering sound of audible frequency in water. (Conventional art)
Conventionally, as this type of underwater acoustic device, there are devices as shown in FIGS. 4
to 7, respectively. In FIG. 4, a cone 2 and a moving coil 3 forming a vibrating portion l, a
permanent magnet 4 and a center ball 5. A dynamic speaker (or a dynamic microphone,
hereinafter referred to as a "spindle") 7 having a yoke 6 is attached so as to close one opening 8a
of the casing 8, and the casing 8 is filled with the liquid 9. The liquid 9 is filled so that some air
remains in the casing 8. In such an underwater sound W device, even when the dynamic speaker
7 is put into water together with the casing 8, the fluid 9 in the casing 8 substantially maintains
the pressure balance inside and outside the device, and the air in the casing 8 described above
The vibrating portion l vibrates to emit or recover sound in water. In the case shown in FIG. 5,
the dynamic speaker 7 is accommodated in the casing 8 and the opening 8a is closed by the lid
8b without being filled with liquid. In such an underwater acoustic device, since the casing 8 is
not filled with the liquid, the movement of the vibrating portion l of the dynamo-speaker 7 is free
as compared with that shown in FIG. Blindness can be released or recovered. In the case shown
in FIG. 6, the dynamic speaker 7 is accommodated in the casing 8, the casing 8 is filled with the
liquid 9, and the opening 8a is closed by the lid 8b. The dynamic speaker 7 is mounted so that
the liquid 9 can flow around the vibrating portion l. Such an underwater acoustic device can flow
the liquid 9 over the front and back of the vibrating portion l of the dynamic speaker 7, and
therefore, compared to the one in FIG. 4 in which the liquid is filled only at the rear of the
vibrating portion l The movement of the vibrating portion 1 of the dynamic speaker 7 can be
11-05-2019
1
increased, and the sound can be efficiently emitted or recovered accordingly. In the configuration
shown in FIG. 7, the vibrating portion 12 in which the piezoelectric element 11 is joined to the
vibrating plate 10 is connected to the lid 14 of the casing 13 by the rod 15. Such an underwater
acoustic device can transmit the vibration of the vibrating portion 12 to the lid 14 through the
rod 15 and release or recover a in water.
(Problems to be Solved by the Invention) The above-mentioned conventional underwater acoustic
devices have the following problems. That is, the one shown in FIG. 4 has a problem that it is
inefficient because only the portion of the air in the casing 8 can vibrate the vibrating portion l.
In the case shown in FIG. 5, since the casing 8 is not filled with liquid, the cover 8b is crushed
inwardly by water pressure as shown in FIG. There is a problem of In order to prevent the lid 8b
from being crushed, the thickness may be increased, but in that case the sound transmission
efficiency is significantly reduced. As shown in FIG. 6, since the liquid 9 can flow around the
vibrating portion 1 of the dynamic speaker 7 as described above, sound is emitted more
efficiently than in the case of FIG. However, since the sound is transmitted through the four
bodies 8b, there is also a problem that the efficiency is deteriorated. : The problem shown in Fig.
JS7 is that the vibration of the vibrating part 12 is transmitted to the water through the U rad 15
and the lid 14 so that the efficiency of the part via the lot 15 and the lid 14 is poor. There is. An
object of the present invention is to solve the problems of the conventional apparatus as
described above, and to provide a sound g9 capable of efficiently emitting or recovering sound in
water. (Means for Solving the Problems) In order to achieve the purpose E2, the underwater
acoustic device of the present invention has covered the vibrating portion for emitting or
recovering the sound with a waterproof and flexible covering material. (Operation and Effect) In
the present invention, since the vibration portion is covered with a waterproof and flexible
covering material, the vibration device itself constitutes an acoustic device, and a casing as in the
prior art is not required. That is, the vibration itself can be put into water to emit or recover
sound. In addition, since the vibration itself can be put in water, sound can be efficiently emitted
or recovered regardless of any water pressure environment. (Embodiment) Hereinafter, an
embodiment shown in the drawings will be described. Embodiment 1 FIG. 1 is a cross-sectional
view showing a first embodiment of the underwater acoustic device according to the present
invention. In the figure, reference numeral 20 denotes a vibrating portion, which comprises a
vibrating plate 21 and a piezoelectric element 22 joined to the vibrating plate 21. The vibrating
plate 21 and the piezoelectric element 22 are each in the shape of a disc and are concentrically
joined. The diaphragm 21 may be made of any suitable material, for example, a brass plate.
23.24 are lead wires for energizing the piezoelectric element 22 or for receiving an electrical
signal from the piezoelectric element 22.
A reference numeral 30 denotes a covering material which covers the vibrating portion 20, and
has waterproofness and flexibility. The covering material 30 is any material having
11-05-2019
2
waterproofness and flexibility, and for example, urethane rubber is adopted. In addition to
waterproofness and flexibility, in consideration of durability, urethane rubber is most preferable
as a covering material. As means for covering the covering material 30 on the vibrating portion
20, electrostatic coating, dipping, and other means capable of covering the vibrating portion 20
in a thin film shape can be employed. The underwater acoustic bag 21A as described above can
directly put the vibrating part 20 itself covered with the covering material 30 into water to emit
sound or recover it. And since the vibration part 20 itself directly enters the water, it is possible
to efficiently emit or recover the sound in any water pressure environment. Embodiment 2 FIG. 2
is a cross-sectional view showing a second embodiment of the underwater acoustic device
according to the present f6. In the present embodiment, the underwater acoustic device A
described as the first embodiment is attached to a support B. A channel 40 is formed in the
support B, and the device J in water is put in the water together with the support B. The wood
enters the support B through the flow path 40, and the pressure acting on the acoustic bag and
the placement A becomes equal pressure so that the operation of the acoustic device A is not
impeded. <Third Embodiment> FIG. 3 is a cross-sectional view showing a third embodiment of
the underwater acoustic device according to the present invention. In this embodiment, a
dynamic speaker shown in FIG. 4 is covered with a covering material 30.31 to form an
underwater acoustic bag ff1A ′ ′, which is attached to a support B °. In FIG. 3, the same parts
as those of the dynamic speaker shown in FIG. In addition, the flow path 40 or i is set so as not to
prevent the operation of the acoustic bag mA also in the support body B of the present
embodiment. Although the embodiments of the present invention have been described above, the
present invention is not limited to the above-described embodiments, and it is needless to say
that modifications can be made as appropriate without departing from the scope of the invention.
For example, in the third embodiment (FIG. 3), the covering material 31 covering the yoke 6 etc.
is not necessarily required.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a sectional view showing a first embodiment of the underwater acoustic device
according to the present invention, FIG. 2 is a sectional view showing the second embodiment
above, FIG. 3 is a sectional view showing the third embodiment above, FIG. 4 to 7 are crosssectional views of conventional underwater acoustic devices.
A: underwater acoustic device, l, 20: vibration part, 30: covering material. Figure 1 Figure 2
11-05-2019
3
Figure 3 iJ4 Figure 6 Figure 5 5 Discrimination 7 Figure
11-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jph01255398
1/--страниц
Пожаловаться на содержимое документа