close

Вход

Забыли?

вход по аккаунту

?

JPH07104759

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 JPH07104759
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
sounder which is incorporated in various mobile communication devices and the like and is used
to emit a ringing tone called ringer sound by reproducing a specific frequency band and a
method of manufacturing the same. is there.
[0002]
2. Description of the Related Art A conventional sounder of this type will be described with
reference to the drawings. FIG. 4 is a front half sectional view showing the structure of a
conventional sounder, and in FIG. 4, 10 is a plate having a center pole portion, 11 is a ringshaped magnet coupled to the peripheral upper surface of this plate 10, 12 is a plate 10 A coil
13 is fitted to the outer periphery of the center pole portion, and 13 is a terminal plate coupled
to the bottom surface of the plate 10, and is provided with an external connection terminal 13a
for connecting the lead wire of the coil 12. 14 is a lower case obtained by combining the outer
peripheral surface of the plate 10 with the outer peripheral surface and the upper surface of the
magnet 11 coupled to the plate 10; 15 a diaphragm with the outer peripheral portion coupled to
the upper surface of the lower case 14; The upper case is coupled to the upper portion of the
case 14 and has a configuration in which the sound emission hole 16 a is provided on the upper
surface and the air chamber 17 is formed on the diaphragm 15.
[0003]
03-05-2019
1
In the conventional sounder configured as described above, when a rectangular wave signal is
applied to the coil 12 through the external connection terminal 13a, a magnetic circuit is
generated by the magnetic circuit formed by the magnet 11 and the plate 10, and the magnetic
force generated by this magnetic field Is pulled down and curved so that the diaphragm 15 made
of a high magnetic permeability material such as permalloy is attracted to the upper surface of
the center pole portion of the plate 10. At this time, since the signal applied to the coil 12 is a
rectangular wave, the diaphragm 15 is repeatedly bent and returned to its original position, and
this operation is configured to reproduce a specific frequency band. It was
[0004]
However, the above-described conventional configuration is difficult to miniaturize because it is a
combination of many parts, and not only leads to increase in parts cost and man-hour, but the
gap dimension H shown in FIG. There was a problem that we could not guarantee well.
[0005]
That is, the gap dimension H is determined by the accuracy of each part of the plate 10, the
magnet 11 and the lower case 14 and the assembling accuracy using the adhesive. Taking the
sounder which is generally used as an example, the dimension of the gap dimension H is 0
Variation occurred up to a tolerance of about ± 0.02 mm with respect to the reference value of
15 ± 0.01 mm.
As the gap size H decreases, the lowest resonance frequency f0 decreases, and as the gap size H
increases, the lowest resonance frequency f0 not only increases, but the gap size H deviates by
0.01 mm. It occurred.
[0006]
The object of the present invention is to solve such conventional problems, and to provide a
compact and high-performance sounder, a sounder that simultaneously realizes a manufacturing
method capable of manufacturing the same with high quality, and a manufacturing method
thereof. It is
[0007]
03-05-2019
2
SUMMARY OF THE INVENTION In order to solve this problem, a sounder according to the
present invention and a method of manufacturing the same according to the present invention
hold a plate having a center pole portion at the center by insert molding and lead wire lead
through vertically. Ring-shaped magnet made of resin magnet with a hole for the coil, coil
arranged on the outer periphery of the center pole of the plate, connecting the starting end of
this coil and having an external lead terminal on the bottom of the plate A terminal plate coupled,
a diaphragm provided with a predetermined gap above the plate and having an outer peripheral
portion coupled to the top surface of the magnet, and a radiation conductor guiding the radiation
sound of the diaphragm to the outside The ring-shaped magnet comprises a bottomed resonance
cover coupled to the periphery of the magnet so as to close the front of the plate. A terminal
plate is connected to the bottom of a plate having a center pole portion insert-molded in the
center of the net, and coil drawing wire drawn out is provided on the plate in a state where the
coil is fitted close to the outside of the center pole portion of this plate The lower end of the coil
is pulled out by sucking a hole from the lower surface and then the coil is inserted, and after the
start and end of the pulled out coil are connected to the terminal plate, the diaphragm is
mounted on the upper surface of the magnet In addition, a resonance cover for closing the upper
surface of the diaphragm is coupled to the periphery of the magnet.
[0008]
With this configuration, the plate is insert-molded when molding the magnet made of resin
magnet, and the gap dimension can be stably and stably secured because the outer peripheral
portion of the diaphragm is joined to the upper surface of this magnet. Quality can be improved
simultaneously.
Furthermore, the cost reduction by the reduction of the number of parts and the cost reduction
by the reduction of the number of assembling steps can be realized together.
[0009]
An embodiment of the present invention will be described below with reference to the drawings.
1 (a) and 1 (b) are a plan view showing the configuration of the sounder according to the
embodiment, and a front sectional view showing an A-O-B cross section in this plan view, and
FIGS. 1) is a ring-shaped magnet obtained by injection molding a resin magnet, and 2 is a plate
03-05-2019
3
insert-molded during injection molding of the magnet 1. The plate 2 has a center pole portion
and a coil lead wire. It is set as the structure provided with the hole 2a for pulling out, and the
hole 2b for back surface opening.
[0010]
The reference numeral 3 denotes a coil fitted to the outer periphery of the center pole portion of
the plate 1, the starting end of which is drawn out from the hole 2a of the plate 1, and the
electrode portion (not shown) of the terminal plate 4 coupled to the bottom surface of the plate
2. )It is connected to the. Moreover, the terminal board 4 uses the flexible type | mold which
formed the electrode part in the resin film, in order to attain thickness reduction. A diaphragm 5
has a laminated double structure using permalloy of a high magnetic permeability material, and
has an outer peripheral portion coupled to the upper surface of the magnet 1.
[0011]
Reference numeral 6 denotes a bottomed resonance cover coupled to the outer peripheral
surface of the magnet 1 in a state of closing the upper surface of the diaphragm 5, and an air
chamber 7 is formed on the upper surface of the diaphragm 5. It is set as the structure which
provided the radiation sound conduction 6a which connects with the exterior on the side surface.
Reference numeral 8 denotes an external lead terminal, which is inserted into a hole provided in
the terminal plate 4 and connected to the resonance cover 6 and soldered.
[0012]
2 (a) and 2 (b) are a plan view and a front sectional view showing the magnet 1 in which the
plate 2 is insert-molded, and the dimension H shown in FIG. 2 (b) corresponds to the center pole
portion of the plate 2 and the diaphragm It shows the gap dimension with 5.
[0013]
In the sounder of the present invention configured as described above, the gap dimension H
which has been a problem in the conventional sounder can be made with high accuracy by
insert-molding the plate 2 when injection molding the magnet 1 using a resin magnet. In
addition, it becomes possible to secure stably, and it becomes possible to guarantee gap
dimension H of 0.15 ± 0.005 mm when compared with the same specifications as the
conventional product, and greatly improve performance and quality. It becomes possible.
03-05-2019
4
[0014]
In addition, by combining the resonance cover 6 with the magnet 1, it is possible to combine the
parts of the upper case 16 and the lower case 14 in the related art, thereby reducing the number
of parts and the number of assembling steps. It becomes possible to achieve cost reduction of 30
to 40% of the product price.
[0015]
Furthermore, the use of the flexible type for the terminal plate 4 can also contribute to
downsizing and thinning.
[0016]
FIG. 3 is a cross-sectional view showing a part of the manufacturing process for manufacturing
the sounder of the present invention, wherein the magnet 1 obtained by insert molding the plate
2 having the center pole portion is placed on the assembling jig 9. By sucking the suction pipe 9a
of the jig 9 in a state in which the coil 3 is fitted close to the outer periphery of the center pole
portion, the starting end of the coil 3 is provided through the coil drawing wire drawing hole 2a
provided in the plate 2. The lead wires 3a and 3b are drawn downward.
[0017]
With such a manufacturing method, the fine coil lead wires 3a and 3b can be drawn out easily
and surely, and the improvement of the working efficiency and the stabilization of the quality can
be achieved.
[0018]
As described above, in the sounder according to the present invention, the gap dimension can be
stably ensured with high accuracy by insert molding the plate at the time of molding the magnet,
and hence high performance and high reliability Can be realized simultaneously.
[0019]
In addition, it is possible to significantly reduce the cost by reducing the number of parts and the
number of assembling steps, and the contribution of realizing the demands of small size, thin
size, high performance and low price at a high level is significant.
03-05-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
13 Кб
Теги
jph07104759
1/--страниц
Пожаловаться на содержимое документа