close

Вход

Забыли?

вход по аккаунту

?

JPH0370399

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 JPH0370399
[0001]
FIELD OF THE INVENTION The present invention relates to a sound generator. [Prior Art] FIG. 2
is an explanatory view showing a prior art. Japanese Patent Application Laid-Open No. 57168600 describes a sound generator using magnetostriction, which will be described below. A
diaphragm 7 is attached to the support 6, and an iron core 9 having a coil 8 wound around the
other end of the diaphragm is supported with a gap, thereby applying a magnetic field to the
diaphragm. The diaphragm has a structure in which magnetostrictive members 10A and IOB
different in positive and negative of displacement due to magnetostriction are attached to each
other. In this structure, when alternating current is supplied to the coil, the diaphragm vibrates
up and down in response to the change of the magnetic field. In this way, vibration noise is
obtained. [Problems to be Solved by the Invention] However, in the prior art, since the
magnetostrictive material has a structure in which the magnetostrictive materials are bonded in
opposite directions of displacement due to magnetostriction, shear stress is generated on the
bonded surface, and energy loss can be avoided. Not 0 The present invention aims to solve this
problem and to propose an efficient sound generator. [Means for Solving the Problems] The
sound-producing body according to the present invention comprises a coil, a coil disposed at the
right and left of the coil, and in a magnetic field formed by the coil And a case for fixing a coil
direction end of the magnetostrictive body. [Operation] In the sounding body according to the
present invention, an alternating magnetic field is formed around the coil by applying an
alternating current to the coil. A pair of magnetostrictive bodies arranged at the right and left of
the coil and in the magnetic field formed by the coil by this magnetic field and mutually spaced
apart from each other with different signs of displacement due to magnetostriction repeat
expansion and contraction in the positive and negative directions, The vibration of the
magnetostrictive body is generated due to the sound generation. Embodiment 1 FIG. 1 is an
explanatory view showing an embodiment of the present invention. FIG. 1 (a) is an explanatory
04-05-2019
1
view showing a configuration of the invention, and FIGS. 1 (b) and 1 (c) are explanatory views
showing a displacement state of a diaphragm. In FIG. 1 (a), the magnetostrictive members 2A and
2B are disposed on the left and right of the coil 1, and the magnetostrictive members are fixed by
the support plate 3 at an interval from each other to form the diaphragm 4. The support plate is
attached to the case 5. When an alternating current is supplied to the coil, an alternating
magnetic field is formed around the coil, and bending vibration occurs in the diaphragm as
shown in FIGS. 1 (b) and 1 (c). In FIG. 1 (b), the magnetostrictive material 2A stretches and the
magnetostrictive material 2B shrinks. In FIG. 1 (b), the magnetostrictive material 2A shrinks and
the magnetostrictive material 2B stretches.
As a result, the diaphragm receives bending vibration and generates sound. In this way, the
diaphragm vibrates without internal losses, so the efficiency is very good. [Effects of the
Invention] As described above, according to the present invention, since the diaphragm is
vibrated by the achieving action of the magnetostrictive material spaced, there is an effect that a
high sound pressure can be obtained efficiently.
[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 a prior art.
1 ... coil, 2 ... magnetostrictive material, 3 ... support plate, 4 ... diaphragm, 5 ... case.
04-05-2019
2
Документ
Категория
Без категории
Просмотров
0
Размер файла
9 Кб
Теги
jph0370399
1/--страниц
Пожаловаться на содержимое документа