close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPS63117600

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 JPS63117600
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electrodynamic speaker with improved acoustic characteristics and improved space factor. 2.
Related Art In recent years, for the purpose of improving the acoustic characteristics of an
electrodynamic speaker, electrodynamic speakers of a system having a flat diaphragm shape and
flattening of sound pressure frequency characteristics have been put to practical use. . A
conventional electrodynamic speaker will be described below with reference to the drawings.
Conventionally, an electrodynamic speaker has generally been configured as shown in FIG. In
FIG. 6, 1 is a conical cone-shaped diaphragm having a circular hole for voice coil insertion at the
center, 2 is a frame, 3 is an edge joined to the outer periphery of the diaphragm and further
frame 2 joined to the outer periphery 4 is a voice coil, 5 is a dust cap, 6 is a damper, and 7 is a
magnetic circuit. The operation of the electrodynamic speaker configured as described above will
be described below. Conical-cone-shaped diaphragm 1 in which voice coil 4 vibrates up and
down by passing current through voice coil 4 inserted in magnetic gear tube a of magnetic
circuit 7 and consequently joined to the upper end of voice coil 4. And the dust cap 6 joined to
the upper surface of the cone-shaped diaphragm 1 is vibrated up and down, thereby vibrating air
and generating a sound. However, in this type of electrodynamic speaker, as shown in FIG. 6, the
cone surface for vibrating air is conical and is axially symmetrical with respect to the center line,
so for example The sound radiated from C and d is opposite in phase at a certain frequency, and
causes a peak dip in the sound pressure frequency characteristic as shown in FIG. 7 e. (Hereafter
this phenomenon is called the front room effect. Therefore, in recent years, an electrodynamic
speaker having a configuration as shown in FIG. 8 has been developed and used for a long time.
In FIG. 8, reference numeral 8 denotes a flat diaphragm, and 9 is a coupling cone joined to the
upper end of the voice coil 4 and at the same time to the lower surface of the flat diaphragm 8. In
the electrodynamic speaker configured in this manner, the flat diaphragm 8 vibrates up and
11-04-2019
1
down via the coupling cone 9 joined to the upper end of the voice coil 4 by the voice coil 4
vibrating up and down. Thus, the air is vibrated to generate a sound, and the surface of the
diaphragm for vibrating the air is on the same surface because it is flat, the front chamber effect
can be reduced, and the occurrence of the phase difference is small. As shown in FIG. 7 r, a flat
sound pressure frequency characteristic with few peak dips was obtained.
Problems to be solved by the invention However, in such a conventional configuration, when the
flat diaphragm 8 is used as the diaphragm, it becomes a cost amplifier significantly larger than
when the cone-shaped diaphragm 1 is used, and the diaphragm There is a problem that the
efficiency is reduced because the weight is heavier than the cone shape. The present invention
solves such a problem, and provides a low cost, high efficiency, flat dynamic pressure speaker
with sound pressure frequency characteristics by using a triangular pyramidal cone-shaped
diaphragm. It is an object of the present invention to provide an electrodynamic speaker in which
the space factor is improved by making the frame shape into a triangular shape. SUMMARY OF
THE INVENTION In order to solve this problem, the present invention is directed to a coneshaped diaphragm having an outer peripheral portion formed in a triangular shape and a circular
hole for voice coil insertion in the central portion, and a cone A triangular-shaped edge portion
disposed on the outer peripheral portion of the diaphragm, a triangular-shaped frame for
supporting the outer periphery of the edge portion, and a triangular-shaped dust cap disposed on
the upper surface of the cone-shaped diaphragm. is there. Operation With this configuration, a
triangular pyramidal cone diaphragm can be produced at the same cost as a conventional conical
cone diaphragm, and a diaphragm that vibrates air by using a triangular pyramidal cone
diaphragm. Because each face is asymmetrical with respect to the voice coil drive position, the
phase difference due to the vibration of each face is generated, but the front chamber effect can
be reduced because the phases are different, and a triangular dust cap can be used. The rigidity
of the cone surface can be enhanced by arranging it on the upper surface of the diaphragm, and
it is possible to prevent the occurrence of a large peak dip when viewed from the sound pressure
frequency characteristic, and the efficiency of the sound pressure frequency characteristic is
high. It will be possible to support. In addition, by making the frame shape into a triangular
shape, it is possible to provide an electrodynamic speaker in which the space factor is improved,
and corner installation and the like are also possible. Embodiment An embodiment of the present
invention will be described with reference to the drawings. The same reference numerals as in
FIGS. 6-8 indicate the same parts. FIG. 1 is a plan view showing the configuration of an
electrodynamic speaker according to an embodiment of the present invention. In FIG. 1, 10 has
an outer peripheral portion formed in a triangular shape and a circular shape for voice coil
insertion at the central portion. And a triangular pyramid-shaped cone-shaped diaphragm having
a curved surface at each corner, 11 is a triangular-shaped edge portion disposed on the outer
peripheral portion of the cone-shaped diaphragm 10, and 12 is an edge portion A triangular
frame for supporting the outer circumference of 11, 11 is a screw hole provided at a part of each
corner of frame 12, and 14 is a triangular dust placed on the upper surface of cone diaphragm
11-04-2019
2
1Q. It is a cap.
FIG. 2 shows the configuration of the electrodynamic speaker according to the embodiment of
the present invention shown in FIG. 1, and is a structural cross-sectional view seen on the center
Mg of the plan view shown in FIG. h is a center line of the structural sectional view. The
operation of the electrodynamic speaker configured as described above will be described below.
As shown in FIG. 2, the cone surfaces a and b of the triangular pyramid-shaped cone-shaped
diaphragm 1o have different inclinations with respect to the center line, whereby the diaphragm
surface for taking air moves asymmetrically. Therefore, although the sound radiated from the
cone surfaces a and b of the cone-shaped diaphragm 1Q has a phase difference, the front
chamber effect can be reduced because the phases are different in each surface, and the dust
having a triangular shape is formed. The cap 14 is disposed on the upper surface of the cone
diaphragm 10, and the shape of the dust cap 14 is compared with the corner portion 10b of the
cone diaphragm 10 in which the adhesion surface between the cone surface and the dust cap 14
is curved. The rigidity of the cone surface can be enhanced by adopting a dust cap structure in
which the bonding surface with the flat portion 10 & of the cone diaphragm 10 constituted by a
flat surface is positioned in the frame direction, As shown in Figure 3 i when viewed in the
frequency characteristic, in which a flat responsible characteristics of the sound pressure
frequency characteristic with high efficiency while suppressing the occurrence of peak-dip is
obtained. Further, as shown in FIG. 4, when the electrodynamic speaker 16 of the present
invention is used, installation to each corner 16 constituted by an indoor wall or the like can be
efficiently performed in a small space. As described above, according to the present embodiment,
a triangular pyramid-shaped cone-shaped diaphragm 1o having an outer peripheral portion
formed in a triangular shape and a circular hole for voice coil insertion in the central portion, and
triangular dust By providing the cap 14, the front room effect can be reduced, the rigidity of the
cone surface can be enhanced, and the flat characteristic of the sound pressure frequency
characteristic can be obtained with high efficiency, and the triangular shape is also provided. By
providing the frame 12 of the present invention as the dynamic speaker 15, the corner of the
speaker can be installed, and a dynamic speaker with an improved space factor can be obtained.
Effect of the Invention As described above, according to the present invention, the outer
peripheral portion is formed in a triangular shape, and a cone-shaped diaphragm having a
circular hole for voice coil insertion at the center portion, and the outer peripheral portion of the
cone-shaped diaphragm The front effect can be reduced by providing a triangular shaped edge
disposed on the edge, a triangular shaped frame supporting the outer periphery of the edge, and
a triangular shaped dust cap disposed on the upper surface of the cone-shaped diaphragm. The
rigidity of the surface can be enhanced, and the flat characteristics of sound pressure frequency
characteristics can be realized with a cone-shaped diaphragm, whereby the effects such as low
cost and high efficiency can be obtained, and dust and frame Since the shape is a triangular
shape, it is possible to obtain an effect that an electrodynamic speaker with an improved space
factor can be obtained.
11-04-2019
3
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a plan view showing the structure of an electrodynamic speaker according to an
embodiment of the present invention, FIG. 2 is a structural cross sectional view of the
electrodynamic speaker shown in FIG. 1, and FIG. Sound pressure frequency characteristics of the
electrodynamic speaker according to an example, FIG. 4 is a layout diagram of an electrodynamic
speaker showing a practical example of the electrodynamic speaker according to one
embodiment of the present invention, and FIG. 6 is a conventional electrodynamic speaker 6 is an
enlarged cross-sectional view of the cone-shaped diaphragm portion of the dynamic type speaker
shown in FIG. 6, and FIG. 7 is a conventional dynamic type speaker (cone type). FIG. 8 is a
structural cross-sectional view of a conventional electrodynamic loudspeaker (flat plate).
4 ..... Poisuko / f le, 6 ...... damper, 7 ...... magnetic circuit, 10 ииииии cone diaphragm, 11 ...... triangle
Shape of the edge, 12 иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Dust
cap with triangle shaped dust cap. Name of agent Attorney Nakao Toshio has 1 person Figure 3
Figure 4 Figure 5 a-7 Figure 6 Figure 7 One station number of fluid Figure 8,
11-04-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
description, jps63117600
1/--страниц
Пожаловаться на содержимое документа