close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPS54118231

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 JPS54118231
1. A speaker according to the invention, characterized in that a plurality of bimorph structures
including a piezoelectric plate and a non-piezoelectric plate are arranged on the outer peripheral
portion of a diaphragm. A plurality of bimorph structures including two piezoelectric plates and a
non-piezoelectric plate are disposed on the outer peripheral portion of the diaphragm, and at
least one bimorph structure displaced in the opposite phase to the bimorph structure is disposed
near the center of the diaphragm. Speaker to do.
Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
driven speaker. An object of the present invention is to realize a thin speaker. Another object of
the present invention is to realize a speaker with high conversion efficiency. Conventionally, the
reproduction of sound is performed by various speakers 8, but the most common and useful one
is an electrodynamic speaker. This will be described with reference to FIG. In the electrodynamic
speaker shown in FIG. 1, 1 is a vibrating part, 2 is a permanent stone, 3 is a yoke, 41d pole piece,
5 is a coil joined to the cone 1, 2 to 5 The drive unit is formed. 6 is a reinforcing plate. Also, a
hole 7 for emitting sound is provided in the speaker box 8. In the electrodynamic speaker shown
in this example, the diameter of the speaker is increased in order to perform reproduction in the
bass region with high efficiency, and the speaker box 8 needs a large volume, so the entire
configuration is very high. It will be a large one. The present invention is a thin-typed speaker
which has totally changed the concept of the above-mentioned conventional speaker, and has a
high efficiency in the reproduction of the bass region. FIG. 2 shows an example of a Pyro
EndPage: 1 RF configuration ?--for use in the speaker of the present invention. 2 (A) is a
perspective view, and FIG. 2 (B) is an enlarged view of the X-x 'cross section of FIG. 2 (A). In FIG.
2, 9 is a conductor plate and 10 is a piezoelectric plate. Reference numerals 11 and 12 denote
14-04-2019
1
upper and lower electrodes applied to the piezoelectric plate 10, and the lower electrode 12 is
joined to the conductor plate 9 by a conductive paste 16 or the like. When an audio signal is
input between the electrodes 11.12, the piezoelectric plate 10 tries to move in the main surface
direction KIfI'fkj, but the bimorph structure with the conductor plate 9 causes surface bending
vibration. FIG. 5 shows an embodiment of a speaker according to the present invention, wherein
a plurality of the above bimorph structure is joined to the outer peripheral portion of a plate
capable of vibrating. In the perspective view of FIG. 5 (A), 14 is a diaphragm, 15 Is a fixed frame
for fixing the diaphragm, and 16-23 is the bimorph structure. FIG. 6 (B) is a state of the Y-Y
'cross section which caught the moment when the speaker of FIG. FIG. 6 (02 and ?) is an
enlarged view of a portion surrounded by a broken line O at both ends of FIG. 3 (B). The bimorph
structures 16 to 23 are all joined to the vibration plate 14 with an adhesive, a metal brazing
material, welding, etc., with a uniform polarization direction on the outer peripheral portion.
Further, the peripheral portion of the diaphragm 14 is fixed by a fixed frame 15.
Now, when an audio signal is input to each bimorph structure, surface bending vibration occurs
in each bimorph-the central portion a is lifted with the periphery as a fulcrum, and the
diaphragm 14 is bent in the low surface direction as shown in the figure. FIG. 4 shows the
configuration of the above-mentioned speaker, in which a sound-producing body having a phase
opposite to that of the outer-peripheral sound-producing body is disposed in the center. FIG. 4
(A) is a perspective view of this appearance, in which 24 is a diaphragm, 25 is a fixed frame for
fixing the diaphragm, and 26 to 36 are bimorph structures of the outer peripheral portion, and
bimorph structures 54 displaced in opposite phase thereto. Is located in the central part. FIG. 4
(B) is a state of the w-w 'cross section taken at the moment when the speaker of FIG. 4 (A) is
vibrating. FIG. 4 (C) is an enlarged view of the sounding body at the central portion surrounded
by a broken line in FIG. 4 (B). The speaker shown in FIG. 4 has the effect of further promoting the
bending of the diaphragm at the time of vibration and suppressing the divided vibration by
joining the bimorph structure of the opposite phase also to the central portion. The advantage of
the loudspeaker according to the invention is 1, thin. Since the entire Z diaphragm is curved, it is
possible to obtain the reproduced sound in the bass region at a high efficiency in%. The cost is
low because the configuration is simple. Etc. (The number of junctions of the inmorph structure
is two or more, and the number of junctions of the inmorph structure is optional. However, the
sound pressure is very excellent by adjusting the dimensions and thickness of each, considering
the thickness and material of the diaphragm. Indicates frequency characteristics. In particular, it
is effective for a display board that emits sound utilizing the thinness of the speaker of the
present invention, and can be recognized as both a visual advertising and a hearing when a
sound is emitted from the display board as a new advertising medium. It has a wide range of
applications, such as for educational purposes.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an electrodynamic speaker. FIG. 2 is used
14-04-2019
2
for a speaker according to the present invention. Indicates +1. FIG. 6 shows an embodiment of a
loudspeaker according to the present invention. FIG. 4 shows the configuration of the speaker of
FIG. 3 further including an outer peripheral sound generator and a sound generator of reverse
phase arranged in the center. 1 ...... cone 2 ...... permanent magnet 3 ...... yoke 4 ----- pole piece 5
ииииии coil 6 ...... reinforcing plate 7 ииииии Hole 8 иииииии Speaker box 9 ииииии Conductor plate 10 ииииии
Piezoelectric plate 11 иииииии Electrode 12 иии иии Electrode 13 и и и и и Conductive paste 14 и и и и и и и и и и
Fixed frame 16 и и и и и и Bimorph structure 1.1 и и и и и и и и bimorph structure 11! / и и и и и и Bimorph
structure EndPage: 219 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и Bimorph
structure 20 и и и и и и и и bimorph structure 21 и и и и и и и bimorph structure 22 и и и и и и и и и и bimorph
structure 23 и и и ...... Structure 29 иии и и и bimorph structure 60 и и и и и и bimorph structure 31 и и и и и и и
bimorph structure 32 и и и и и и bimorph structure 53 и и и и и и и и и bimorph structure ... Bimorph
structure or more Fang 1 m 1 ^) Fig. 2 (A) 4 (A) (2 I) (C) fourth rs EndPage: ?
14-04-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
description, jps54118231
1/--страниц
Пожаловаться на содержимое документа