close

Вход

Забыли?

вход по аккаунту

?

JPS55150578

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 JPS55150578
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional flat
panel speaker, FIG. 2 is a cross-sectional view of a ring-shaped flat panel speaker which is the
basis of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a
cross-sectional view of a ring-shaped flat-plate speaker, and FIG. 4 is a comparison diagram of
sound pressure frequency characteristics of a speaker according to an embodiment of the
present invention and a conventional cone-shaped speaker. In the figure, 1 is a diaphragm, 2 is a
voice coil, 3 is an edge, 4 is a spider, 5 is a magnetic circuit, 6 is a reinforcing ring, and the same
reference numerals indicate the same or corresponding parts.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of flat panel loudspeakers. Conventionally, a cone-shaped speaker diaphragm is widely used. This
is because the diaphragm is structurally very strong, so that one diaphragm is easily subjected to
split vibration stimulation << and hence a wide reproduction zone is easily obtained. In addition,
the performance has been sufficiently achieved even with an inexpensive diaphragm material
such as a paper cone using natural fibers. The cone type speaker widely used in this way causes
a large peak dip on one sound pressure frequency aperture) 粂 ', three K's, / <07'73 number
characteristic due to a cone-shaped recess Is listed as a drawback. In addition, the frequency at
which this peak noise occurs is a major obstacle to reducing the recent demand for highperformance loudspeakers, since the diaphragm is originally in the piston imaging region. In
addition, a flat diaphragm may be used to eliminate the peak dip due to the cone shape, but if the
central portion of the flat diaphragm is driven by a rod, bending vibration is likely to occur due to
the flat plate. In fact, only a cone shape or less was obtained, and it was not used for practical
use. On the other hand, as a method for removing the defect of this flat plate type speaker, a
method of driving the node of the axisymmetric-next divided vibration of the ring-shaped flat
plate diaphragm can be considered. This method has the advantage of making the piston area
equal to or greater than that of the cone type speaker and the advantage of making the sound
11-05-2019
1
pressure frequency characteristics flat, but it also enables the flat characteristics to be obtained.
Small peak dips may be noticeable. FIG. 1 is a cross-sectional view of a conventional flat-plate
speaker, which has a large number of 4 °-(1) is a flat diaphragm, (2) is a fully driven voice coil,
and (3) is a flat The edge connected to and supported by the outer periphery of the movable
plate, (4) is connected to the voice coil 12+, and the spider maintains the linearity of the protein
system, (5) will be a magnetic circuit part thus configured The flat type speaker using the flat
plate-like moving plate could obtain flat sound pressure frequency characteristics, but the
diaphragm was easily bent and was restricted due to the use band. Fig. 2 is a cross-sectional view
of a flat panel phantom speaker using a ring flat plate which is the basis of the present invention.
(1) is a node of the ring-shaped flat plate (2 · axisymmetric primary division vibration of a twopiece / g-like flat plate (3) is connected to the inner and outer circumferences of the ring-shaped
flat plate and supports it, (4) is connected to the voice coil (2) and a spider that maintains the
linearity of the vibration system (( 5) is a magnetic circuit unit.
The Km-made flat plate speaker has both the peace of sound pressure frequency characteristics
which is a feature of the flat plate speaker and the wide piston area which is a feature of the cone
speaker. (3) ° · · · · · However, since the sound pressure frequency characteristics are flat, there
is a drawback that the peak dip due to the resonance of the edge is noticeable. In the present
invention, a reinforcing ring is attached to the inner end and / or the outer end of the ringshaped flat diaphragm, and a small peak dip due to the resonance of these ends is also
suppressed, and a flatter sound pressure frequency characteristic is obtained. Make it possible.
FIG. 3 is a cross-sectional view of an embodiment of a flat plate speaker using a ring flat plate
according to the present invention, in which (l) drives the nodes of axisymmetric primary division
vibration of the ring flat plate and +21 h IJ ring flat plate (1) Voice coil (3) is connected to the
inner and outer circumferences of the ring-shaped flat plate to support it, (4) is connected to the
voice coil (2) and a spider to maintain the linearity of the vibration system, (5) is magnetic The
circuit (6) is a ring attached to the back surface of the inner and outer peripheral portions of the
diaphragm. In the flat panel speaker according to one embodiment of the present invention,
which is JfCH structured as described above, a sound pressure lid ("1.rho. Frequency
characteristic becomes possible") can be compared to a speaker simply using a ring-shaped flat
plate as a diaphragm. is there. Conventional cone-shaped loudspeakers have a wide piston area
even with a relatively low physical constant, such as a boat cone, due to the rigid configuration of
the cone shape as mentioned in the article. However, due to the concavity of the cone, the sound
field was disturbed, causing a large beak and dissip all over the piston area. Also, in general,
assuming that the frequency at which this drop occurs is λ, where 1 phase is 9 wavelengths, and
the diaphragm radius is a, it is assumed that ka = 2πa / λ is 2 to 3. For example, caliber 9011!
In the speaker of III, a drop occurs from around the use band of 100011z. On the other hand,
although a cone-shaped speaker is usually equipped with a center cap, there is radiation of sound
from this center cap, and it was difficult to obtain a flat sound pressure frequency characteristic
as a whole. Also, the small beef dip due to the edge resonance was less noticeable due to the
11-05-2019
2
effect of the sound field of the cone. In the flat panel speaker shown in FIG. 2, no vibration or dip
occurs in the peak (5) that has occurred at the cone diaphragm because the diaphragm is flat, but
conversely, a small peak · · · by the edge resonance. There was a drawback that the dip was
noticeable. Due to the peak-di, bum, and edge resonance due to this edge resonance, the
diaphragm is also deformed, and the sound radiation is disturbed t1.
It is expected to happen. In the flat panel speaker according to the present invention of FIG. 3,
since the reinforcing ring is attached to the inner periphery and the outer periphery of the ringshaped imaging plate, the resonance of one edge lessens the deformation of the diaphragm, The
level of beak and dip can be reduced considerably. FIG. 4 shows the sound pressure frequency
characteristics (comparison with al and the sound pressure frequency characteristics of the flat
speaker according to the present invention) of the cone type speaker having the same aperture
as the flat speaker according to the embodiment of the present invention. Characteristics are
obtained. As described above, according to the present invention, a flatter sound pressure
frequency is made possible by attaching a reinforcing ring to one or both of the inner periphery
and the outer periphery of a ring-shaped flat diaphragm. (A (4) In the embodiment of the present
invention, the reinforcing ring is attached to the inner and outer peripheries of the diaphragm in
one embodiment of the present invention, but the same effect can be obtained with either one
depending on the purpose.
11-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jps55150578
1/--страниц
Пожаловаться на содержимое документа