close

Вход

Забыли?

вход по аккаунту

?

JP2003274485

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 JP2003274485
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker manufacturing method and a speaker adapted to reproduce, for example, high frequency
sound signals.
[0002]
2. Description of the Related Art In recent years, since the performance of audio equipment
(audio amplifier etc.) has been improved, a large signal (large input signal) is often supplied to a
speaker, and improvement of input resistance is required.
[0003]
When a large input signal is supplied to the speaker, heat is generated due to the resistance of
the voice coil in the voice coil portion that drives the diaphragm, causing thermal damage to the
material constituting the voice coil portion, and the speaker, particularly the high frequency
acoustic signal. There is a problem of breakage in the speakers that play the.
[0004]
In order to ameliorate this problem, as shown in FIG. 2 above, a magnetic fluid is injected into the
magnetic gap of the magnetic circuit section into which the voice coil of the voice coil bobbin to
which the diaphragm is attached and the voice coil is inserted. The heat generated in the voice
coil portion is transmitted to the plate, the center pole, the magnet, and the magnetic circuit
portion of the yoke having a large heat capacity to dissipate heat, thereby improving the input
13-05-2019
1
resistance.
[0005]
Referring to FIG. 2, the speaker for reproducing the high frequency acoustic signal shown in FIG.
2 is, for example, a balance dome type tweeter with a diameter of 25 mm, and 1 denotes a ring
magnet mounted on the yoke 2, Reference numeral 2 a denotes a center pole integrally formed
with the yoke 2.
[0006]
A ring-shaped plate 3 is mounted on the ring-shaped magnet 1, and a magnetic gap 4 is formed
between the inner peripheral surface of the plate 3 and the outer peripheral surface of the center
pole 2a.
In this case, the ring-shaped magnet 1, the plate 3, the magnetic gap 4, the center pole 2a and
the yoke 2 constitute a magnetic circuit of the speaker.
[0007]
In FIG. 2, reference numeral 5 denotes a dome-shaped diaphragm, and the upper end of the voice
coil bobbin 7 on which the voice coil 6 is wound around the boundary between the dome-shaped
diaphragm 5 and an edge 5 a provided on the outer periphery While bonding, the voice coil 6 is
inserted into the magnetic gap 4 of the magnetic circuit.
A frame 8 is fixed to the outer periphery of the plate 3 of the ring-shaped magnet 1 and the outer
periphery of the edge 5a of the diaphragm 5 is fixed.
[0008]
In FIG. 2, the magnetic fluid 9 having a relatively high thermal conductivity is injected into the
magnetic gap 4 into which the voice coil 6 of the voice coil bobbin 7 to which the diaphragm 5 is
bonded is inserted.
13-05-2019
2
[0009]
By the way, the magnetic fluid 9 is held in the magnetic gap 4 by magnetism, however, the
magnetic fluid 9 contaminates the outside of the diaphragm 5 and the magnetic circuit by
droplets due to vibration at the time of driving the speaker, capillary flow and the like. Have a
problem.
[0010]
In particular, the voice coil bobbin 7 and the diaphragm 5 made of a porous material such as
paper are easily contaminated and difficult to use.
In the case of using the diaphragm 5 or the voice coil bobbin 7 made of a porous material such
as paper, the oil and fat component (mineral oil) of the magnetic fluid 9 is repelled beforehand,
and an oil repellent agent is applied or impregnated.
[0011]
Conventionally, to bond one end of the voice coil bobbin 7 on which the diaphragm 5 and the
voice coil 6 are wound with an adhesive, as shown in FIG. 3, the voice coil bobbin 7 on which the
diaphragm 5 and the voice coil 6 are wound is used. The lube repellant is coated or impregnated
separately, respectively, and the diaphragm 5 is bonded to one end of the voice coil bobbin 7 on
which the voice coil 6 is wound with an adhesive. Thereafter, the voice coil 6 is magnetically
coupled to the magnetic circuit. It was made to insert in the space | gap 4.
[0012]
However, the lube repellant is composed mainly of silicone, fluorocarbon resin or paraffin wax
and has poor adhesion.
For this reason, the adhesive strength between the diaphragm 5 and one end of the voice coil
bobbin 7 on which the voice coil 6 is wound, which is required when manufacturing the
conventional speaker, is reduced. In the conventional speaker input resistance test, the voice coil
bobbin 7 around which the voice coil 6 is wound is dropped, and as a result, the input resistance
is lowered.
13-05-2019
3
[0013]
In view of the foregoing, the present invention is a voice coil bobbin on which a voice coil is
wound, a speaker using a porous material such as paper for a diaphragm, and heat radiation
using magnetic fluid without contamination. An object of the present invention is to improve
adhesion to one end of a voice coil bobbin on which a diaphragm and a voice coil are wound, and
to improve input resistance.
[0014]
According to a method of manufacturing a speaker of the present invention, a magnetic fluid is
injected into a magnetic gap into which a voice coil of a voice coil bobbin to which a diaphragm
is attached is inserted, and heat generated by the voice coil is detected. In a speaker
manufacturing method in which heat is transmitted to a magnetic circuit unit via a magnetic
fluid, the diaphragm and the voice coil bobbin are bonded with an adhesive, and then the oil and
fat component of the magnetic fluid is repelled to repel the oil repellent. It is applied or
impregnated.
[0015]
According to the present invention, after bonding the diaphragm and the voice coil bobbin on
which the voice coil is wound with an adhesive, the oil and fat component of the magnetic fluid is
repelled, and an oil repellent agent is applied or impregnated. Since the adhesion between the
voice coil bobbin and the voice coil bobbin is performed when the oil repellent agent is not
applied or impregnated, the adhesion is equivalent to that without the application or
impregnation of the oil repellent agent, and the adhesion is improved without reduction.
[0016]
Further, after bonding the diaphragm and the voice coil bobbin, the oil and fat component of the
magnetic fluid is repelled, and the oil repellent agent is applied or impregnated, so that the
diaphragm and the voice coil bobbin are not contaminated.
[0017]
Therefore, according to the present invention, in a voice coil bobbin on which a voice coil is
wound, a speaker using a porous material such as paper for a diaphragm, vibration is caused
without contamination even if heat is dissipated using a magnetic fluid. The adhesion between
the plate and one end of the voice coil bobbin on which the voice coil is wound is improved, and
input resistance can be improved.
13-05-2019
4
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method of
manufacturing a speaker according to the present invention and a speaker will be described
below with reference to FIGS.
[0019]
In the present example, the invention is applied to a loudspeaker for reproducing high frequency
acoustic signals as shown in FIG.
The speaker as shown in FIG. 2 is, for example, a balanced dome type zwitter with a diameter of
25 mm, and 1 denotes a ring-shaped magnet mounted on the yoke 2 and 2 a is a center pole
integrally formed with the yoke 2 .
[0020]
Reference numeral 3 denotes a ring-shaped plate mounted on the ring-shaped magnet 1, and a
magnetic gap 4 is formed between the inner peripheral surface of the plate 3 and the outer
peripheral surface of the center pole 2a.
In this case, the ring-shaped magnet 1, the plate 3, the magnetic gap 4, the center pole 2a and
the yoke 2 constitute a magnetic circuit of the speaker.
The ring-shaped magnet 1, the plate 3, the center pole 2a, and the yoke 2 that constitute this
magnetic circuit are made of metal such as iron, and have a large heat capacity and good heat
dissipation characteristics.
[0021]
In FIG. 2, reference numeral 5 denotes a dome-shaped diaphragm, and the upper end of the voice
coil bobbin 7 on which the voice coil 6 is wound around the boundary between the dome-shaped
diaphragm 5 and an edge 5 a provided on the outer periphery Glue.
13-05-2019
5
[0022]
In this example, the voice coil 6 is wound on the diaphragm 5 as shown in FIG. 1 to bond one end
of the voice coil bobbin 7 on which the diaphragm 5 and the voice coil 6 are wound with an
adhesive. One end of the voice coil bobbin 7 is bonded with an adhesive, for example, Hardlock
G55 (manufactured by Denki Kagaku Kogyo Co., Ltd.), and the voice coil bobbin 7 wound with
the diaphragm 5 and voice coil 6 bonded thereafter is The oil repellent agent treatment is applied
or impregnated with FS710 (silicon-based) (Nippon Yushi Co., Ltd. made), Modiper F 3035
(fluorine-based) (Nippon Yushi Co., Ltd.).
[0023]
The voice coil 6 of the voice coil bobbin 7 on which the lube repellent-treated diaphragm 5 and
voice coil 6 are wound is inserted into the magnetic gap 4 of the magnetic circuit and the outer
periphery of the edge 5 a of the diaphragm 5 is the plate of the ring magnet 1 It fixes to the
flame | frame 8 fixed to the outer peripheral side of 3. FIG.
[0024]
Further, in the present embodiment, the magnetic fluid 9 having a relatively high thermal
conductivity is injected into the magnetic gap 4 in which the voice coil 6 of the voice coil bobbin
7 to which the diaphragm 5 is bonded is inserted.
[0025]
According to this example, after adhering the diaphragm 5 and the voice coil bobbin 7 on which
the voice coil 6 is wound with an adhesive, the oil and fat components of the magnetic fluid 9 are
repelled, and the oil and fat components of the oil repellent fluid 9 are repelled. Since the lube
repellant is applied or impregnated, and the adhesion between the diaphragm 5 and the voice
coil bobbin 7 is performed when the lube repellant is not applied or impregnated, this adhesion
is not applied or impregnated with the lube repellant. The adhesion is improved without loss.
[0026]
Further, according to this embodiment, since the oil repellent agent that repels the fat and oil
component of the magnetic fluid 9 is applied or impregnated after bonding the diaphragm 5 and
the voice coil bobbin 7, the diaphragm 5 and the voice coil bobbin 7 are not contaminated.
[0027]
Therefore, according to the present embodiment, the voice coil bobbin 7 on which the voice coil
13-05-2019
6
6 is wound, and the speaker using a porous material such as paper for the diaphragm 5
contaminate even if the heat is radiated using the magnetic fluid 9 Accordingly, the adhesion
between the diaphragm 5 and one end of the voice coil bobbin 7 on which the voice coil 6 is
wound can be improved, and the input resistance can be improved.
[0028]
Incidentally, as the first vibration system, the material of the diaphragm 5 is paper, the material
of the voice coil bobbin 7 is kraft paper, the material of the diaphragm 5 is paper as the second
vibration system, and the material of the voice coil bobbin 7 is polyimide film The shear strength
test was conducted on the samples of the conventional treatment, the treatment of the present
example, and the non-treatment.
[0029]
A 10 mm wide paper and kraft paper were treated with Modiper FS 710 or Modiper F 3035 as a
sample of the first vibration system of the conventional treatment, and bonded with Hardlock
G55 over 10 mm in width and 10 mm in length as shown in FIG. .
[0030]
In addition, as a sample of the second vibration system of conventional processing, after 10 μm
wide paper and polyimide film are treated with Modiper FS 710 or Modiper F 3035 as a lube
repellant, as shown in FIG. Bonded with.
[0031]
As a sample of the first vibration system of this example processing, after bonding 10 mm wide
paper and kraft paper with hard lock G55 over width 10 mm and length 10 mm as shown in FIG.
4, oil repellent treatment with modiper FS 710 or modiper F 3035 did.
[0032]
As a sample of the second vibration system of this example treatment, as shown in FIG. 4, 10 mm
wide paper and polyimide film are bonded with Hardlock G55 over 10 mm wide and 10 mm
long, and treated with oil repellent agent with Modiper FS710 or Modiper F3035 did.
[0033]
As shown in FIG. 4, 10 mm wide paper and kraft paper were bonded with a hard lock G55 over a
width of 10 mm and a length of 10 mm as a sample of the untreated first vibration system, and
13-05-2019
7
no oil repellent treatment was performed.
[0034]
As shown in FIG. 4, a 10 mm wide paper and a polyimide film were bonded with a hard lock G55
over a width of 10 mm and a length of 10 mm as a sample of the second vibration system
without treatment, and no oil repellent treatment was performed.
[0035]
Each sample was pulled in the directions of arrows a and b at 25 ° C. and a pulling rate of 5 mm
/ min as measurement conditions.
[0036]
As shown in Table 1, the measurement results show that the adhesion is small in the
conventional treatment, and in comparison with this treatment, no decrease in the adhesion was
observed, and the sample was cut from the paper as in the non-treatment.
[0038]
Further, a balance dome type tweeter having a diameter of 25 mm as shown in FIG. 2 was
manufactured with the material composition of the first vibration system and the second
vibration system, and the input resistance test, The contamination with the magnetic fluid 9 after
the input resistance test was observed.
[0039]
The conditions of the input-proof test added input signal IEC DIN noise, input 60W to this
balance dome type tweeter (speaker), and measured time-proof.
The maximum test time in this case was 100 hours.
[0040]
Moreover, observation of the contamination by the magnetic fluid 9 observed the contamination
condition which generate | occur | produced on the surface of the diaphragm 5 after the inputproof test.
13-05-2019
8
[0041]
According to the test results, as shown in Table 2, no contamination was observed in the
conventional treatment, but detachment of the voice coil bobbin 7 on which the voice coil 6 was
wound occurred, which is presumed to be caused by the insufficient adhesive strength.
In the case of no treatment, destruction of the voice coil 6 due to heat and staining due to the
magnetic fluid 9 occurred.
On the other hand, in the balance dome type tweeter of this example processing, the input
resistance was 100 hours, and no contamination was observed.
[0043]
Of course, the present invention is not limited to the above-described example, and various other
configurations can be adopted without departing from the scope of the present invention.
[0044]
According to the present invention, in a voice coil bobbin on which a voice coil is wound, a
speaker using a porous material such as paper for a diaphragm, contamination is caused even if
heat is dissipated using magnetic fluid As a result, the adhesion between the diaphragm and one
end of the voice coil bobbin wound with the voice coil can be improved, and input resistance can
be improved.
13-05-2019
9
Документ
Категория
Без категории
Просмотров
0
Размер файла
17 Кб
Теги
jp2003274485
1/--страниц
Пожаловаться на содержимое документа