close

Вход

Забыли?

вход по аккаунту

?

JPH02268594

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 JPH02268594
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
low leakage flux nubica used in various audio and visual equipment. Prior Art A conventional low
leakage flux type 7 beaker of this type has a configuration as shown in FIG. That is, the
diaphragm 6 is bonded to the peripheral portion of the frame 5 configured by integrating the
magnetic circuit 4 configured by sandwiching the main magnet 1 by the upper plate 2 and the
lower plate 3 and molding it with resin. The voice coil 7 for driving the diaphragm 6 is centerheld by the damper 8 at its middle part and coupled so as to fit into the VB air gap 9, and the
surface of the diaphragm 6 coupled to the voice coil 7 is The dust cap 10 was adhered to form a
nupeca body. Furthermore, the back surface of the lower plate 3 is multi-configured by the
cancel magnet 11 that is deposited in the opposite direction to the main magnet 1 and the shield
cover 12 that covers the side surface and the back surface of these magnetic circuits 4.
SUMMARY OF THE INVENTION However, the conventional nupeca of this type reduces the
leakage flux from the magnetic circuit 4 by the effect of the cancel magnet 11 and the shield
cover 12. In this case, the shield cover 12 is used. Although it is effective for the side part and the
back part of the magnetic circuit 4 of Nubica due to the shape of Nabica, some part of the
magnetic flux is generated for the Nupeca front part because there are no parts for shielding the
leaked magnetic flux. It has been a problem that it can not be used for video equipment where
the level of requirements for the camera is extremely strict. The present invention solves the
above five conventional problems and provides a low-leakage flux type nupeker having very
excellent performance against leakage flux. Means for Solving the Problems In order to solve the
above problems, the present invention relates to the upper plate of the upper plate of the
magnetic circuit molded integrally with the resin frame and the upper portion of the center pole
of the lower plate, and the distance between the upper plate and the upper plate. To arrange a
plate for magnetic flux shielding made of magnetic metal, thereby shielding the leakage flux
13-05-2019
1
toward the front of the speaker, which usually has a very large amount of leakage flux, and
reducing the leakage flux to the outside. It is. With the above configuration, in addition to the
magnetic shielding effect of the conventional cancel magnet and shield cover on the side and
back of the magnetic circuit of the nubica, the leakage flux to the front is also compared with the
front of the upper plate. It is magnetically shielded by the plate made of a magnetic metal body
disposed in front of the center pole of the lower plate, and the leakage flux to the outside is
greatly reduced.
Embodiment 1 A low leakage flux speaker according to an embodiment of the present invention
will be described with reference to the drawings. As shown in FIG. 1, an upper plate of a frame
26 is formed by integrally molding a magnetic circuit 24 formed by sandwiching the main
magnet 21 by an upper plate 22 and a lower plate 23 and integrating the magnetic circuit 24
with resin. The shield plate 33 is adhered to the front surface of the mold portion 22, and the
shield laminated plate 34 composed of the resin portion 34a and the magnetic metal portion 34b
is adhered to the front surface of the center pole 23a of the lower plate 23. The diaphragm 26 is
adhered to the peripheral edge of the frame 26, and the voice coil 27 for driving the diaphragm
2? is centered with the damper 28 at its middle portion, and the magnetic gap 29 is The dust
cap 30 is bonded to the surface of the connecting portion of the diaphragm 26 with the voice coil
27 to form a nubica body. ing. Furthermore, the back surface of the lower plate 23 is composed
of a cancel magnet 31 magnetized in the direction opposite to the main magnet 21 and a shield
cover 32 covering the side surface and the back surface of these magnetic circuits 24. By doing
this, since there is no component to be shielded normally, the front surface of the upper plate 22
and the front surface of the center pole 23a of the lower plate 23 are separated by resin even in
the speaker front direction where a large amount of leakage flux is generated. The shield plate
33 made of a magnetic metal body and the shield product ffJ-y'v-) 34 make a magnetic shield
and the leakage flux in the direction of the front of the nupeca is significantly reduced. Effects of
the Invention As described above, according to the present invention, in addition to the magnetic
shielding effect to the side direction and the back direction of the magnetic circuit by the
conventional cancel magnet and shield cover, the front direction of the upper plate and the front
direction of the center pole of the lower plate. In addition, since a magnetic shield against the
front direction of the magnetic circuit can also be implemented by a shield plate made of a
magnetic metal body, which is disposed by providing a resin distance between the respective
resins, an ultra-low-leakage flux speaker unlike any prior art is provided. Can. Its industrial value
is enormous.
[0002]
Brief description of the drawings
13-05-2019
2
[0003]
FIG. 1 is a cross-sectional view of a low leakage magnetic flux speaker according to an
embodiment of the present invention, and FIG. 2 is a cross sectional view of a conventional low
leakage magnetic flux nuplier.
21 иии и и и Main magnet, 22 и и и и и и и и и Top plate. 23 ...... lower plate, 24 ...... magnetic circuit, 26 ииииии
frame, 26 ...... diaphragm 27, river ... voice coil, 28 ...
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
..... shield plate, 34 ...... shield for laminated plate. Name of agent Attorney Attorney Shigetaka
Takano Other 1 list 2 1
13-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
10 Кб
Теги
jph02268594
1/--страниц
Пожаловаться на содержимое документа