close

Вход

Забыли?

вход по аккаунту

?

JPH10210593

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 JPH10210593
[0001]
The present invention relates to a speaker diaphragm and a method of manufacturing the same,
and more particularly to a speaker diaphragm in which a diaphragm and a voice coil bobbin are
integrated, and a method of manufacturing the same.
[0002]
2. Description of the Related Art In recent years, as shown in FIGS. 3 and 4, by disposing a
repulsion type magnetic circuit 21 at the center of a cone diaphragm 11 using a repulsion type
magnetic circuit 21, the speaker can be made thinner. There is a repulsive magnetic circuit type
speaker. As is well known, the repulsion type magnetic circuit 21 arranges the ring-shaped
magnets 22 and 23 so that the same poles face each other, and utilizes the repulsion magnetic
field generated on the outer peripheral side of the magnets 22 and 23 to generate the repulsion
magnetic field. The voice coil 12 is disposed inside, and in general, a ring-shaped center plate 24
made of a magnetic material is sandwiched between the magnets 22 and 23 in order to increase
the magnetic flux density. The magnets 22 and 23 and the center plate 24 are held by a holder
25 made of nonmagnetic material, and the frame 26 is attached to the holder 25.
[0003]
The repulsion type magnetic circuit 21 is disposed at the central portion of the cone diaphragm
11-05-2019
1
11, and the coil bobbin 12a of the voice coil 12 and the neck portion 11a of the cone diaphragm
11 are bonded so as to be positioned on the outer peripheral side of the center plate 24.
Adhesively fixed with agent S. In the figure, 27 is a damper, and 28 is a terminal.
[0004]
As described above, although the repulsion type magnetic circuit 21 is disposed at the central
portion of the cone diaphragm 11 which is originally bulky to achieve a thinner speaker, it is
conventional to use a cone. Since the neck portion 11a of the diaphragm 11 and the coil bobbin
12a are bonded and fixed by the adhesive S, as shown in FIG. 4, the neck portion 11a and the coil
portion (winding portion) 12b of the voice coil 12 and However, since the adhesive is broken by
the heat of the voice coil 12 at high input, it is unsuitable for a speaker requiring high input.
[0005]
Also, since the neck portion 11a of the cone diaphragm 11 is adhered to the coil bobbin 12a in
which the coil portion 12b is formed in the related art, the neck portion of the cone diaphragm
11 is assembled when the cone diaphragm 11 is taken down from above The diameter of the
neck portion 11a is required so that the coil 11a passes through the outer diameter of the coil
portion 12b of the voice coil 12, the distance between the joint surface of the neck portion 11a
and the joint surface of the coil bobbin 12a becomes large, and the adhesive It has fallen, causing
the adhesive strength to weaken.
[0006]
The object of the present invention is to eliminate the conventional defects as described above
and to integrate the cone diaphragm and the coil bobbin to form, thereby eliminating the need
for adhesion of the cone diaphragm and the coil bobbin and reducing the manufacturing process,
and high input power It is an object of the present invention to provide a speaker diaphragm that
can be applied to a speaker that requires a speaker and a method of manufacturing the same.
[0007]
The speaker diaphragm according to the present invention is a speaker diaphragm formed by
injection molding of a synthetic resin or the like, wherein the engaging portion formed on the
neck portion of the diaphragm is a voice coil bonder. It is characterized in that it is inserted into
and engaged with a slit provided on the circumference of the.
[0008]
Further, in the method of manufacturing a speaker diaphragm according to the present
11-05-2019
2
invention, in the method of manufacturing a speaker diaphragm manufactured by injection
molding the speaker diaphragm with a synthetic resin or the like, the vibration during the
injection molding of the speaker diaphragm. A voice coil bobbin provided with slits on the
circumference on the inner peripheral side of the neck portion of the plate is disposed and insertmolded, thereby forming an engaging portion which is inserted into and engaged with the slit
from the neck portion and vibrates A plate and a voice coil bobbin are integrated.
[0009]
The slit is provided at a predetermined position of the voice coil bobbin, that is, on the
circumference of the connecting portion with the neck portion of the diaphragm, and the voice
coil bobbin is placed on the neck portion side of the diaphragm at the injection molding of the
diaphragm. Place the and shape it.
Thus, the engagement portion is formed from the neck portion of the diaphragm via the slit, and
the diaphragm and the voice coil bobbin are integrated.
[0010]
Although it is difficult to insert-mold a voice coil bobbin in which a coil portion is wound in
advance due to the structure of a mold, it can be implemented without any particular problem if
it is wound after integral molding.
[0011]
By forming the voice coil bobbin on the diaphragm by insert molding, the connection between
the both becomes strong, and since it is not adhesively fixed, it can be used also for a high input
speaker.
[0012]
In addition, in the speaker assembly process, there is no need to apply an adhesive or position
the voice coil to match the center of the coil portion with the center of the center plate of the
repulsive magnetic circuit, facilitating the manufacturing process and stabilizing the quality. Can
be
[0013]
11-05-2019
3
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a
speaker diaphragm according to the present invention, and is a cross-sectional view of the main
parts showing an example applied to a repulsive magnetic circuit type speaker. FIG. 2 is a
perspective view of a voice coil bobbin. .
[0014]
In the figure, 1 is a cone diaphragm manufactured by injection molding of synthetic resin, 2 is a
voice coil, 3 is a voice coil bobbin, and it is on the circumference of the position where the neck
portion 1a of the cone diaphragm 1 is to be joined. Horizontal slits 4 as shown in FIG. 2 are
provided.
[0015]
In injection molding of the cone diaphragm 1, the voice coil bobbin 3 is disposed on the inner
peripheral side of the neck portion 1a of the cone diaphragm 1, and the voice coil bobbin 3 is
insert-molded.
As a result, the resin flows out from the neck portion 1a through the slit 4, and the engaging
portion 1b engaged with the slit 4 is molded, and the cone diaphragm 1 and the voice coil bobbin
3 are integrated and coupled.
[0016]
When it is difficult to insert-mold the voice coil bobbin 3 in which the coil portion 5 is formed in
advance due to the structure of a mold (not shown) during injection molding of the cone
diaphragm 1, the voice coil bobbin 3 is attached to the cone diaphragm 1. After being insertmolded, the coil portion 5 is formed by winding at a predetermined position of the voice coil
bobbin 3.
[0017]
By integrating the neck portion 1a of the cone diaphragm 1 and the voice coil bobbin 3 as
described above, the two are firmly coupled, and there is no need to provide a clearance for the
coil portion 5 to pass through the neck portion 1a. A highly reliable speaker diaphragm can be
obtained.
11-05-2019
4
[0018]
FIG. 1 shows a state in which the cone diaphragm 1 and the voice coil 2 configured as described
above are incorporated into a repulsion type magnetic circuit 21, in which 22 and 23 are
magnets, 24 is a center plate, 27 is a damper, S is an adhesive for bonding the damper 27 and
the voice coil bobbin 3.
[0019]
Although FIG. 1 shows an example in which the cone diaphragm 1 is incorporated as a repulsion
magnetic circuit type speaker, it is of course possible to use the same as the cone diaphragm of a
normal internal magnet type speaker.
[0020]
According to the speaker diaphragm of the present invention, since the neck portion of the
diaphragm and the voice coil bobbin are integrated instead of being bonded by the adhesive, they
are bonded by the conventional adhesive. Unlike the above, it can be used as a speaker
diaphragm that requires high input, and there is no clearance between the inner diameter of the
neck of the diaphragm and the voice coil bobbin, so it is possible to use a highly reliable
diaphragm and can do.
[0021]
According to the method of manufacturing a diaphragm for a speaker of the present invention,
the diaphragm and the voice coil bobbin can be integrally formed by insert molding the voice coil
bobbin at the time of injection molding of the diaphragm, thereby reducing the number of
manufacturing steps and reliability. An excellent loudspeaker diaphragm can be manufactured
easily and inexpensively.
11-05-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jph10210593
1/--страниц
Пожаловаться на содержимое документа