close

Вход

Забыли?

вход по аккаунту

?

JPH0373699

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 JPH0373699
[0001]
FIELD OF THE INVENTION The present invention relates to a sound generator. [Description of
the Related Art] In water, since low frequency waves have high transmission efficiency compared
to high frequency waves, they are used in various marine technologies such as sonar, marine
resource exploration, and fish school guidance. The conventional underwater sounding body
utilizes the piezoelectric phenomenon as one of its principles. In Japanese Patent Application
Laid-Open No. 61-181299, an example of a piezoelectric wave transmitter is shown. In this prior
art, a lever is used to expand the displacement of the piezoelectric body in order to avoid the
limitation of the displacement of the diaphragm which is a drawback of the piezoelectric
transmitter. [Problems to be Solved by the Invention] However, since the conventional device
uses a shell structure for the sounding body, the present invention solves the above problems by
requiring a large force to displace the shell. It is an object of the present invention to propose a
sounding body capable of efficiently and largely displacing the vibrating body. [Means for
Solving the Problems] The sound-producing body according to the present invention is fixed to a
magnetostrictive material and to a case, which is attached to the magnetostrictive material in
series and vertically, and whose positive and negative displacement is different from that of the
magnetostrictive material. Two magnetostrictive materials and three coils disposed in proximity
to the respective magnetostrictive materials are disposed in the case, and one end of the
magnetostrictive material is obliquely connected to one end of the connecting part. A first arm is
disposed, the two arms being pivoted at their intersection point and the other end being pivoted
to two second arms, the second arms being pivoted at the other end Of the magnetostrictive
material, and the left and right two diaphragms in contact with the other end of the second arm,
the diaphragm being a sounding body connected to the case In the sound generator, the
magnetostrictive material is a piezoelectric material. [Operation] The sound generator in the
present invention includes a magnetostrictive material, and two magnetostrictive materials fixed
04-05-2019
1
to the magnetostrictive material in series and at the top and bottom of the magnetostrictive
material and whose positive and negative displacements are different from the magnetostrictive
material. Three coils disposed in proximity to the magnetostrictive material of the above are
disposed in the case, and two first arms which are obliquely connected to one end of the
magnetostrictive material connection part are disposed. The two arms are pivotally connected at
their intersection point, and the other end is pivoted with two second arms, and the two second
arms are magnetostrictive with a displacement magnifying mechanism whose other end is
pivoted. The left and right diaphragms are disposed symmetrically with respect to the material
and in contact with the other end of the second arm, and the diaphragm is a sounding body
connected to the case. Alternating current is supplied to the three coils from a power supply and
a phase tuning circuit (not shown).
As a result, the central magnetostrictive material expands and contracts, and the upper and lower
magnetostrictive materials expand and contract in the same phase. That is, the three
magnetostrictive materials expand and contract in cooperation with each other, and the two
connected portions of the magnetostrictive materials vibrate in the opposite phase in the vertical
direction. The vibration is transmitted to the left and right by the displacement enlarging
mechanism to strike the left and right diaphragms. By this, the diaphragm vibrates and sounds.
The above action is the same even if a piezoelectric material is used instead of the
magnetostrictive material. FIG. 2 is an explanatory view showing an operation of the
displacement enlarging mechanism. In FIG. 2, AE and BD are a first arm, and DF and EF are a
second arm. The length of the first arm is 2 and the length of the second arm is l. The first arm
AE and BD intersect at point C. A, B, C, D, E and F are pivotally connected. If A now moves Δy
upward, C moves ΔX toward the center O of AB, D and E move 2ΔX, and F moves 3ΔX. The
relationship between ΔX and Δy is shown by the following equation. Δx = b− (1 ′ ′ − (a +
Δy) 210.5 where a is the length of AO and b is the length of Co. Thus, the present displacement
magnifying mechanism magnifies displacement in the vertical direction to displacement in the
lateral direction by selecting a and b. FIG. 1 is an explanatory view showing an embodiment of
the present invention. The magnetostrictive material 2 is attached to the magnetostrictive
material 1 in series with the magnetostrictive material and at the top and bottom. The positive /
negative (tension or compression) of the displacement of the magnetostrictive material 1 and the
magnetostrictive material 2 is opposite. The magnetostrictive material 2 is fixed to the case 3. A
first arm 6.7 is pivotally connected to the coupling portion 4.5 between the magnetostrictive
material 1 and the magnetostrictive material 2, the first arm is pivotally connected at the
intersection point 8 and the other end is the second arm 9 .10 and the other end 11 of the
second arm 9.10 is pivotally connected to form a displacement magnifying mechanism 15. The
end of the second arm is in contact with the diaphragm 12. The diaphragm is connected to the
case. A coil 13.14 is disposed adjacent to the magnetostrictive material 1.2. In-phase alternating
current is supplied to the three coils from a power supply and a phase tuning circuit (not shown).
As a result, the magnetostrictive material 1 expands and contracts, and the magnetostrictive
04-05-2019
2
material 2 expands and contracts in the same phase. That is, the three magnetostrictive materials
expand and contract in cooperation with each other, and the two connecting portions 4.5 of the
magnetostrictive material vibrate in the opposite phase in the vertical direction. The vibration is
transmitted to the left and right by the displacement enlarging mechanism to strike the left and
right diaphragms. By this, the diaphragm vibrates and sounds. When a piezoelectric material is
used in the above-described apparatus, the same action can be obtained by supplying the same
kind of alternating current to the piezoelectric material instead of using a coil to generate a
magnetic field.
In the present invention, although the phase tuning circuit is used for the generation of the inphase alternating current, three coils may be connected in series, and a first arm pivoted as a
displacement expanding mechanism Although 1.2 is used, arranging a plurality of similar link
mechanisms is within the scope of the present invention. As described above, according to the
present invention, a compact and large vibration plate amplitude, that is, a sound pressure can be
obtained by the series arrangement of a plurality of magnetostrictive materials or piezoelectric
materials and a displacement enlarging mechanism.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIG. 2 is an
explanatory view showing an operation of a displacement enlarging mechanism.
1 ... Magnetostrictive material, 2 ... Magnetostrictive material, 3 ... Case, 4.5 ... Coupling part, 6.7
... First arm, 8 ... Intersection, 9.10 Second arm 11, end of second arm 12, diaphragm 13, 14. coil
15, displacement magnifying mechanism.
04-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jph0373699
1/--страниц
Пожаловаться на содержимое документа