close

Вход

Забыли?

вход по аккаунту

?

JPS6264200

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 JPS6264200
[0001]
The present invention relates to a magnetic circuit device for use in a movable wire ring type
speaker, and more particularly to a magnetic circuit device not having a low leakage voltage vi1.
[Prior Art] A moving wire ring type speaker used in a TV set has a magnetic force leaking to the
outside from its magnetic circuit device and acts on an electron gun of a Braun tube to cause a
strain on an electronic screen, and color TV with color unevenness Since it is disliked to appear,
low leakage flux · b is required. Since a device for reducing unnecessary leakage flux generated
from the speaker magnetic circuit device in the outward direction is expensive, attempts have
been made to reduce the external leakage flux in a direction to lower the cost. For example, those
disclosed in Japanese Patent Publication No. 53-39765, Japanese Patent Publication No. 37
10721 @, and Japanese Patent Publication No. 37-10722 are such. [Problems to be Solved by the
Invention] The present invention uses a magnetic material equivalent to the conventionally used
material, and the leakage flux more than the conventional example by the simple means without
the correction of the basic installation bar 1 of the conventional example. The speaker magnetic
circuit device is provided as a small number. Structure of the invention: As shown in FIG. 1, the
speaker magnetic circuit device according to the present invention has the annular second
permanent magnet 2 and the annular upper plate 3 on the lower plate 1 having the central
magnetic pole 1a erected at the center. A circle magnetized in the direction opposite to the
magnetization direction of the first permanent magnet 2 on the lower side of the external
magnetic circuit 2 in which the annular magnetic gap is formed between the central magnetic
pole 1a and the annular upper play 1 to 3 An annular second permanent magnet 4 is provided,
and a projecting portion 5a in which a part of the bottom of the wedge-shaped shield cover 5 is
protruded inward is abutted U on a part of the lower surface of the second permanent magnet 4.
In addition, as shown in FIG. 2A, in the above configuration, the projection 5b with the center of
the bottom of the wedge-shaped shield cover 5 projecting inward is in contact with a portion of
13-05-2019
1
the lower surface of the second permanent magnet 4. U is what is characterized. Further, as
shown in FIG. 2 (b), in the above configuration, the upper surface of the step 5C formed on the
side surface of the wedge-shaped shield cover 5 is in contact with a part of the lower surface of
the second permanent magnet 4. It is said that. Further, as shown in FIG. 2 (C), in the above
configuration, the bottom of the wedge-shaped shield cover 5 is protruded inward at two points,
and the upper surface of the two projecting parts 5cL and 5d2 is the lower surface of the second
permanent magnet 4. It is characterized in that it is in contact with a part of Further, as shown in
FIG. 2 (d), in the above configuration, the upper surface of the step 5et formed on the side
surface of the wedge-shaped shield cover 5 and the protrusion 5e2 protruding inward at the
center of the bottom portion is the lower surface of the second permanent magnet 4. It is
characterized in that it is in contact with a part of
[Example] The wedge-shaped shield cover 5 is a thin plate of soft magnetic material formed into
a wedge shape, and the bottom and / or the side thereof are shown in FIG. 1, FIG. 2 (A), (B), (C).
As illustrated in (d), the protrusion or the step is formed. Such protrusions [5a, 5t), 5d +, 5d2,
5e21 to steps [5G, 5e1] serve to reduce external low leakage magnetic flux and to facilitate
assembly work. Here, the case of the wedge-shaped shield cover 5 shown in FIG. 1 will be
described. First, the annular first permanent magnet 2 and the annular upper plate 3 are
mounted on the lower plate 1 having the central magnetic pole 1a erected at the center, and the
assembly work is performed between the central magnetic pole 1a and the annular upper plate 3
A frame, an imaging system part, etc. are assembled to the external magnet type magnetic circuit
(4) in which the annular magnetic gap is formed, and the annular first permanent magnet 2 is
magnetized. Next, the annular second permanent magnet 4 bonded and fixed to the projecting
portion 5a formed on the inner bottom portion of the wedge-shaped shield cover 5 is magnetized
so as to face the magnetization direction of the annular first permanent magnet 2 A coating
agent is applied to the upper surface of the annular second permanent magnet 4, and in the nondried state, the external magnetic type magnetic circuit 2 is inserted, and adhesively fixed to the
lower surface of the lower plate 1 of the external magnetic type magnetic circuit 2. At the time of
bonding and fixing the annular second permanent magnet 4 and the lower plate 1, the magnetic
forces of the annular first permanent magnet 2 and the annular second permanent magnet 4 in
the middle of being inserted into the wedge-shaped shield cover 5. However, the repulsion force
is generated by repulsion with each other, but the repulsion becomes small when it enters into
the wedge-shaped shield cover 5, so that a fixing jig for positioning until the undried state
wetting agent is dried is not necessary. In addition, between the lower plate 1 and the annular
first permanent magnet 2, between the annular first permanent magnet 2 and the annular upper
plate 3, between the lower plate 1 and the annular second magnet 4, and the annular first The
two magnets 4 and the wedge-shaped shield cover 5 are all adhesively fixed to each other via an
adhesive by conventional means. In the speaker magnetic circuit apparatus assembled in this
manner, the outer magnet type magnetic circuit 2 is added to the operation of the conventional
outer magnet type magnetic circuit and the lower plate 1 by the opposing magnetic force from
13-05-2019
2
the annular second permanent magnet 4. The leakage flux that was going to be generated on the
lower surface of the Further, a part of the leakage magnetic flux generated on the lower surface
of the annular second permanent magnet 4 flows from the outer peripheral bottom surface of the
annular second permanent magnet 4 to the wedge-shaped shield cover 5 through a space, From
the bottom surface of the two permanent magnets 4 to flow through the projection 5a to the
wedge-shaped shield cover 5, but because the cross-sectional area of the protrusion 5a is small,
the annular second permanent magnet 'EJ4 from the bottom to the wedge-shaped shield cover 5
The flow of magnetic flux is substantially the same as in the case of providing a space over the
entire area between the annular second permanent magnet 4 and the wedge-shaped shield cover
5, and therefore the leakage flux from the annular second permanent magnet 4 is also reduced.
In the case where a space is provided over the entire area of the annular second permanent
magnet 4 and the wedge-shaped shield cover 5 [When the annular second permanent magnet 4
is adhesively fixed to the lower surface of the lower plate 1, the annular first permanent magnet
Since 2 and the annular 2nd ring permanent magnet 4 repel each other by people's magnetic
force and produce a repulsion force, the fixing jig for positioning until an adhesive dries is
needed, and this fixing jig dries adhesion The number of loudspeakers flowing during the
bonding process must be minimized, which increases the manufacturing cost. It is also
conceivable to interpose a nonmagnetic material between the annular second permanent magnet
4 and the wedge-shaped shield cover 5 in order to facilitate the assembly, but in this case the
number of parts increases. The leakage magnetic flux of the speaker magnetic circuit device
according to the present invention is obtained by providing a space over the entire area between
the annular second permanent magnet 4 and the wedge-shaped shield cover 5 as shown in FIG.
And substantially the same as when a nonmagnetic material is interposed between the wedgeshaped shield cover 5 and it is reduced to 1/3 or less as compared with the case where the
bottom surface of the annular second permanent magnet 154 contacts the entire surface. It
becomes a thing. [Effects of the Invention 1] The speaker magnetic circuit device according to the
present invention can reduce the leakage flux to the same extent as the leakage flux when a
space is provided over the entire area between the annular second permanent magnet Ei4 and
the wedge-shaped shield cover 5 Of course, the wedge-shaped shield cover 5 can be formed into
the annular second permanent magnet 4 by adding to the wedge-shaped shield cover 5 a
relatively simple forming process for forming protrusions or steps on the bottom and / or side
thereof. In the lower surface of the case, a substantial magnetic space can be provided and
adhesively fixed without requiring a special support member made of nonmagnetic material.
[0002]
Brief description of the drawings
13-05-2019
3
[0003]
1 and 2 are cross-sectional views of relevant parts for explaining the embodiment, and FIG. 3 is a
characteristic view showing the state of external leakage flux.
1 · · lower plate 2 · · annular first permanent magnet 3 · · annular top plate 4 · · annular second
permanent magnet 5 · · 壺 shield cover, engineering · · external magnetic type magnetic circuit .
Patent applicant Onkyo FIG. 1 procedure ne ... positive out Co., Ltd. (method) 1985 December
cattle Date 1, display 1985 Patent Application No. 204116 2 of the incident, name the speaker
magnetic circuit device 3 of the invention, correction Relationship with applicants case Patent
applicant address 〒 572 Osaka H '4 Shinyagawa City Shincho No. 1 4 4 date of correction
instruction November 06, 1985 (ship date November 26, 1985) 5 Object of correction (1) In the
specification, page 8, line 14, delete "as shown in Fig. 3". (2) Ming II, page 9, line 13 to line 14,
"FIGS. 1 and 2 are characteristic diagrams. Is corrected as follows. [FIG. 1 and FIG. 2 are principal
part sectional views explaining an Example. 」
13-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jps6264200
1/--страниц
Пожаловаться на содержимое документа