close

Вход

Забыли?

вход по аккаунту

?

JPH04107995

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 JPH04107995
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
high-pitched speaker suitable for use in vehicles, and more particularly to a speaker with
improved directivity.
[0002]
2. Description of the Related Art Conventionally, as a vehicle-mounted high-tone reproduction
speaker, as shown in FIG. 9, a semi-dome type speaker in which a diaphragm 1 comprises a cone
12 and a dome 11 is used. In this case, one in which the phase equalizer 2 is provided in front of
the dome portion may be used. As the mounting position, as shown in FIG. 10, the left and right
speakers 61 and 62 are mounted at the front of the driver's seat 51 and the front passenger's
seat 52 or at the position of the door 53. Because of the large angle of {circle around (1)}, a good
directional characteristic can not be obtained, and an improvement is desired.
[0003]
However, the actual pressure distribution f1 from the speakers 61 and 62 is as shown in FIG. 10
because of the directional characteristics of the actual speakers, and good directional
characteristics can not be obtained. At present, the ratio between the direct sound from the
speaker and the indirect sound reflected by the glass or the wall is adjusted by dividing the angle.
03-05-2019
1
[0004]
However, if the driver's seat is adjusted and attached so as to obtain a good stereo feeling, as
shown in FIG. In the frontal axis, there are many direct sounds, which means that good
reproduction can not be obtained.
It is also conceivable to use two speakers at different angles to solve these, but this has the
disadvantage of being expensive.
[0005]
SUMMARY OF THE INVENTION The object of the present invention is to solve the abovementioned conventional drawbacks, and it is an object of the present invention to provide a
speaker for high-pitched sound reproduction capable of significantly improving directivity.
[0006]
SUMMARY OF THE INVENTION In order to achieve the above object, the high-tone reproduction
speaker of the present invention has a spherical or hemispherical reflector disposed in front of
the diaphragm. The directivity of the high sound portion is improved by diffusing and reflecting
the sound wave.
Reflectors have their circumferential length corresponding to the wavelength of the sound wave
from the diaphragm, and the reflectors are made of a material with high internal loss such as
rubber or a material with high rigidity, or the reflector is made of acrylic resin etc. The lightemitting diode can be built in and formed so as to be lighted to exhibit an illumination effect. The
reflector is disposed on the front side of the phase equalizer conventionally provided on the front
side of the dome, or the reflector is formed into a spherical shape and a spherical recess is
formed on the reflector to make the spherical recess face the dome. Can be arranged as a phase
equivalent unit.
[0007]
03-05-2019
2
In the semi-dome type speaker, the sound wave generated at the dome portion is reflected by the
phase equalizer to increase the moving distance of the sound wave, and the phase of the sound
wave from the slope of the cone portion of the diaphragm is phased. Matches. Furthermore, the
sound waves are intercepted by the reflector, bent in direction, and emitted in the lateral
direction. Therefore, the sound pressure in the lateral direction is increased, and the directivity
characteristic is improved.
[0008]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present
invention will be described based on FIGS. 1 to 8. In the drawings, A is the entire speaker unit, 1
is a diaphragm, 2 is a phase equalizer, 3 is a diaphragm 1 The spherical or hemispherical
reflector disposed to be located in front of the diaphragm 1, and the diaphragm 1 and the phase
equalizer 2 have the same configuration as the conventional one.
[0009]
FIGS. 1 to 3 show an example of the construction of a semi-dome type loudspeaker in which the
diaphragm 1 is provided with a dome portion 11 and a cone portion 12. In the example of FIG.
An equalizer 2 is disposed, and on the front side of the phase equalizer 2, a spherical object 31 is
provided as a reflector 3.
In this case, the reflector 3 is formed of rubber with a large internal loss, and its circumferential
length is made proportional to the sound wave from the diaphragm 1.
[0010]
With the above construction, the circumferential length of the reflector 3 is made proportional to
the sound wave from the diaphragm 1, so that the sound waves generated by the hemispherical
dome portion 11 of the diaphragm 1 are phase equivalent. It has a function of increasing the
moving distance of the sound wave by reflecting it against the vessel 2 and matching the phase
with the sound wave from the slope of the cone portion 12 of the diaphragm 1. Also, since the
sound wave is blocked by the spheres 31 and bent in the direction and emitted in the lateral
direction, the sound pressure in the lateral direction rises and the directivity characteristic
becomes good. Furthermore, since the reflector is made of rubber, which is a high internal loss
material, it has a structure that does not easily resonate even if it is disposed in the vicinity of the
03-05-2019
3
diaphragm 1 where the sound pressure is large. However, in the case of the sound wave in the
frontal axis, it decreases as the reflector 3 becomes larger, so in this embodiment, the frontal and
lateral directions of the frequency characteristic are made to have similar characteristics. As a
result, when the diameter of the spherical body 31 is 15 mm, the effect is 7200 Hz or more as
shown in FIG. 6, and when it is 30 mm, the effect is 30.6 Hz or more as shown in FIG. The sound
pressure distribution f2 as shown in FIG.
[0011]
In the configuration example shown in FIG. 2, a spherical object 32 is formed of a transparent
acrylic material as the reflector 3 and a light emitting diode 4 is provided inside the spherical
object 32 and has an illumination function. It is.
[0012]
In the configuration example shown in FIG. 3, a hemispherical recess 3a is formed on the front
side of the spherical reflector 3 to make the recess 3a a phase equivalent portion 21. In this way,
the reflector It becomes possible to achieve simplification of attachment of 3.
[0013]
FIG. 4 shows an elliptical reflector 3 disposed in front of the diaphragm 1 of a dome-shaped
speaker, and FIG. 5 shows an example in which a hemispherical reflector 3 is disposed, even in
these cases. It is possible to obtain the same sound wave reflection and diffusion effects as those
applied to the semi-dome type speaker.
[0014]
According to the loudspeaker for high-pitched sound reproduction of the present invention, it is
possible to obtain an on-vehicle loudspeaker with good directional characteristics with a simple
configuration, and in particular, a material with high internal loss and high rigidity as a reflector.
By using a material that is difficult to resonate as well as making the circumferential length of the
reflecting object correspond to the sound wave from the diaphragm, it is possible to obtain good
directivity characteristics and to obtain better stereo feeling.
Furthermore, by changing the size of the reflector, it is possible to adjust the frequency
characteristics of the high-pitched part, and by forming the reflector with a transparent member
and incorporating the light emitting diode, illumination can be achieved and the appearance is
03-05-2019
4
excellent. Speakers can be obtained.
In addition, by integrally forming the phase equalizer and the reflector, the attachment can be
simplified, and the present invention is not limited to the semi-dome type speaker, and can be
implemented with a normal dome type speaker.
[0015]
Brief description of the drawings
[0016]
1 is a cross-sectional view showing an example in which a reflector is disposed on the front side
of the phase equalizer.
[0017]
2 is a cross-sectional view showing an example in which the reflecting member is formed of a
transparent member and a light emitting diode is incorporated.
[0018]
3 is a cross-sectional view showing an example in which the phase equalizer and the reflector are
integrally molded.
[0019]
4 is a cross-sectional view showing an example in which an elliptical reflector is disposed in front
of the diaphragm of the dome-shaped speaker.
[0020]
5 is a cross-sectional view showing an example in which a hemispherical reflector is disposed in
front of the diaphragm of the dome-shaped speaker.
[0021]
6 is a frequency characteristic diagram showing an example in which the diameter of the
reflector in FIG. 1 is 15 mm.
03-05-2019
5
[0022]
7 is a frequency characteristic diagram showing an example in which the diameter of the
reflector in FIG. 1 is 30 mm.
[0023]
8 is a sound wave distribution diagram of the present embodiment in the driver's seat and the
passenger seat.
[0024]
9 is a cross-sectional view of a conventional in-vehicle speaker.
[0025]
10 is a frequency characteristic diagram of a conventional in-vehicle speaker.
[0026]
FIG. 11 is a sound wave distribution diagram in the driver's seat and the passenger's seat in a
state where the conventional in-vehicle speaker is attached.
[0027]
Explanation of sign
[0028]
A: whole speaker unit 1: diaphragm 2: phase equalizer 3: reflector 4: light emitting diode
03-05-2019
6
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
jph04107995
1/--страниц
Пожаловаться на содержимое документа