close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPH0795688

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 JPH0795688
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
horn speaker using a dome-shaped diaphragm.
[0002]
2. Description of the Related Art A dome-shaped diaphragm is used as a horn speaker mainly for
reproducing high-pitched sound. The sound output from the dome-shaped diaphragm is collected
through a phase equalizer called an equalizer, and then the sound from the collected diaphragm
is guided to the horn, It is configured to output from the horn to the outside.
[0003]
By the way, such a horn speaker does not have the characteristics as designed unless the
magnetic circuit for driving the diaphragm is disposed at the correct position, so the magnetic
circuit such as the magnet is used. When assembling the parts to be configured, a jig is used to
assemble precisely. In particular, since the width of the groove in which the voice coil is disposed
is very narrow, a jig called a gap gauge is used to be precisely assembled. However, there is a
disadvantage that it takes time and effort to assemble precisely using a jig or the like.
12-04-2019
1
[0004]
Also, some of the components (such as magnets) that make up the magnetic circuit may be
structurally difficult to stop with screws or the like, and in such a case, they should be fixed using
an adhesive at the time of assembly. ing. However, when an adhesive is used to connect
components that constitute a magnetic circuit, the flow of magnetic force in the magnetic circuit
of the speaker is blocked by this adhesive, the magnetic efficiency is reduced, and the speaker
characteristics are degraded. There was a disadvantage in doing.
[0005]
In view of these points, the present invention aims to provide a horn speaker which can be
assembled easily and precisely and in which the magnetic efficiency is not reduced by an
adhesive or the like.
[0006]
According to the present invention, for example, as shown in FIG. 1, the sound generated based
on the vibration of the dome-shaped diaphragm 10 is phase-matched by the equalizer 30, and
output from the equalizer 30. In the horn speaker, the components 21, 26, 28, 28, 29, 41
constituting the magnetic circuit disposed around the voice coil 12 wound around the diaphragm
10. The components 27 and 41 of the magnetic circuit disposed around the magnet 28
constituting the magnetic circuit as well as having a structure in which they are fitted to each
other, the magnet 41 generates a magnetic force generated by the magnetization of the magnet
28. It is made to be able to be assembled without using an adhesive, so that the fitting is
maintained by suction.
[0007]
According to the present invention, since the respective components 21, 26, 27, 28, 29, and 41
constituting the magnetic circuit are formed in a structure in which they are fitted to each other,
the magnetic circuit can be formed simply by fitting them. The components 27 and 41 of the
magnetic circuit disposed around the magnet 28 can be assembled in a simple and accurate
state, and the magnetic circuit is attracted to the magnet 41 by the magnetic force generated by
the magnetization of the magnet 28 and the fitting is achieved. Since it is intended to be
maintained, it is not necessary to use an adhesive to fix it, and an adhesive that blocks the flow of
magnetic force can be configured to be absent in the magnetic circuit, to improve the
characteristics of the speaker. Can.
12-04-2019
2
[0008]
DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will
be described below with reference to FIGS.
[0009]
The horn speaker of this embodiment is a speaker unit used in a frequency band higher than
several hundreds Hz (e.g., 500 Hz) and is configured as shown in FIG. 1, and the main part is
shown disassembled in FIG.
In FIG. 1, reference numeral 10 denotes a diaphragm, and the diaphragm 10 is formed in a dome
shape, a cylindrical coil bobbin 11 is formed on an outer peripheral portion of a dome-shaped
curved portion, and a voice coil 12 is wound around the coil bobbin 11. It is disguised.
In the coil bobbin 11 of this embodiment, as shown in FIG. 2, slits 11a are formed at
predetermined intervals in a direction orthogonal to the direction in which the voice coil 12 is
wound (that is, the direction of movement during vibration).
[0010]
Further, an edge 13 is connected to the outer peripheral portion of the diaphragm 10 so that the
edge 13 is sandwiched between the plate 21 on the speaker unit side and the annular pressing
member 24 disposed on the plate 21. The diaphragm 10 is supported on the speaker unit side.
In this case, the spacers 22 and 23 are disposed between the plate 21 and the pressing member
24 as needed to adjust the mounting height of the diaphragm 10.
Then, the pressing member 24 is fixed to the plate 21 using the screw 25a, and the edge 13 of
the diaphragm 10 is fixed to the speaker unit side. Further, the guide ring 26 is simultaneously
fixed to the lower portion of the plate 21 using the screw 25 b from the side opposite to the
screw 25 a. The guide ring 26 has a shape in which the step portion 26a is fitted into the step
portion 21a on the plate 21 side, and the attachment position of the guide ring 26 is determined
based on the attachment position of the plate 21.
12-04-2019
3
[0011]
And the equalizer 30 is arrange | positioned along the curved shape of the diaphragm 10 curved
in dome shape. The equalizer 30 acts as a phase equalizer that combines the phases of sounds
generated by the vibration of the diaphragm 10, collects the sound, and outputs it. The equalizer
30 is formed by aluminum die casting, and has four annular slits concentrically. 31, 32, 33, 34
are formed so that the sound from the diaphragm 10 can be collected by the slits 31 to 34.
[0012]
Then, the cylindrical pole piece 27 is attached to the side (lower side in FIG. 1) opposite to the
diaphragm 10 of the equalizer 30. The outer periphery 27a of the pole piece 27 has the same
diameter as the inner periphery 26a of the guide ring 26 so that the pole piece 27 can be
attached with the inner periphery 26a of the guide ring 26 and the outer periphery 27a of the
pole piece 27 in contact. It is. Therefore, the mounting position of the pole piece 27 is
determined based on the mounting position of the guide ring 26. Further, a through hole 27 b for
connecting a throat 29 described later is formed in a central portion of the pole piece 27. The
pole piece 27 is a component that constitutes the magnetic circuit of the speaker together with
the plate 21 and the like described above, and is made of a magnetic material.
[0013]
Then, on the surface where the pole piece 27 and the equalizer 30 are in contact with each other,
a recess 27c fitted to the protrusion 35 on the equalizer 30 side is formed in the pole piece 27
and the protrusion 35 fits in the recess 27c. It is attached to the pole piece 27 in a slightly
floating state, and a slit 36 is formed between the pole piece 27 and the equalizer 30.
[0014]
Then, the annular magnet 28 can be disposed on the side (lower side in FIG. 1) opposite to the
equalizer 30 of the pole piece 27.
A through hole 28a for connecting a throat 29 to be described later is also formed in the central
12-04-2019
4
portion of the magnet 28. The through hole 28a is slightly larger in diameter than the through
hole 27b of the pole piece 27 described above. It is
[0015]
Then, the cylindrical throat 29 is disposed in the through hole 28 a in the central portion of the
magnet 28 and the through hole 27 b in the central portion of the pole piece 27. The throat 29 is
a member for transmitting the sound output from the equalizer 30 to the horn side, and has a
through hole 29a for passing the sound. The diameter of the through hole 29a gradually
increases as the distance from the portion closer to the equalizer 30 increases. The outer
periphery 29b of the throat 29 is fitted into the through hole 28a of the magnet 28, and the tip
end 29c of the outer periphery 29b has a slightly smaller diameter, and the thin tip end 29c of
this diameter is the pole piece 27. It is set as the shape fitted in the through-hole 27b of.
Therefore, the position of the throat 29 is determined based on the through hole 27 b of the pole
piece 27 and the position of the magnet 28 is determined based on the position of the throat 29.
In the present example, the throat 29 is made of copper.
[0016]
Then, a yoke 41 having a circular through hole 41 a into which the outer periphery 29 b of the
throat 29 is fitted is attached to the throat 29. The yoke 41 is shaped to cover the outer
peripheral portions of the guide ring 26, the pole piece 27, and the magnet 28, and contacts the
plate 21. The yoke 41 is made of a magnetic material and has a screw hole 41b for attaching a
horn (not shown). Then, the back cover 42 is attached to the surface of the speaker unit opposite
to the yoke 41 (upper surface in FIG. 1). The back cover 42 is attached to the yoke 41 via the
plate 21 by screwing or the like.
[0017]
With this configuration, the pole piece 27 disposed on the inner circumferential side of the voice
coil 12 attached to the diaphragm 10, the magnet 28, and the plate 21 disposed on the outer
circumferential side of the voice coil 12 A magnetic circuit as a speaker is constituted by the
yoke 41 connecting the magnet 28 and the plate 21, and the diaphragm 10 vibrates based on the
drive signal supplied to the voice coil 12, and the sound based on the drive signal is generated. Is
output.
12-04-2019
5
[0018]
Here, when the members from the equalizer 30 to the throat 29 are disassembled and shown in
FIG. 2, the plate 21 and the guide ring 26 are fixed by screwing using the respective screw holes
21b and 26d, but the pole piece The fixation between the magnet 27 and the magnet 28 is
achieved by the magnetization of the pole piece 27 by the magnet 28 and the magnetic force.
Further, although the yoke 41 is not shown in FIG. 2, the fixing of the yoke 41 and the magnet
28 is also fixed by the magnetic force of the magnet 28 by the magnetization of the yoke 41 by
the magnet 28. In addition, the diaphragm 10 shown in FIG. 2 shows the state in which the edge
is not attached.
[0019]
According to the horn speaker configured as described above, when assembling the magnetic
circuit, the components can be fitted sequentially as shown in FIG. Even if it does not, the groove
etc. between the plate 21 for arranging the coil bobbin 11 of the diaphragm 10 and the pole
piece 27 etc. are accurately formed, and the speaker of the characteristic as designed by a simple
assembly operation be able to.
[0020]
Also, since the pole piece 27 and the yoke 41 arranged around the magnet 28 are attracted to
the magnet 28 by the magnetic force generated by the magnetization by the magnet 28 and the
fitting with the magnet 28 is maintained, adhesion is achieved. It is not necessary to assemble the
magnetic circuit by fixing it to a magnet or the like using an agent.
Therefore, an adhesive that blocks the flow of magnetic force can be configured not to exist in
the magnetic circuit, and it becomes possible to suppress the generation of eddy current in the
magnetic circuit and to improve the characteristics of the speaker. it can.
[0021]
In the above embodiment, although the assembly was described from the plate 21 side at the
time of assembly, the throat 29 is fitted to the yoke 41 and the magnet 28 is fitted to the throat
29 with the yoke 41 as a reference. The piece 27 or the equalizer 30 may be attached and
12-04-2019
6
assembled.
[0022]
According to the present invention, since the respective components constituting the magnetic
circuit are formed in a structure in which they are fitted to each other, it is possible to assemble
the magnetic circuit into an accurate state simply by fitting the components. The components of
the magnetic circuit disposed around the magnet can be fixed using an adhesive because the
magnetic force generated by the magnetization of the magnet attracts the magnet and the fitting
is maintained. It is not necessary to do this, and an adhesive that blocks the flow of magnetic
force can be configured not to be present in the magnetic circuit, and the speaker characteristics
can be improved.
12-04-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
15 Кб
Теги
description, jph0795688
1/--страниц
Пожаловаться на содержимое документа