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DESCRIPTION JPH02218298

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DESCRIPTION JPH02218298
[0001]
The present invention relates to a dynamic speaker which is one of audio devices. (Problems to
be solved by the prior art and the invention) The conventional speaker system has some
problems. FIG. 2 depicts how the diaphragm of the conventional speaker system vibrates back
and forth. As can be seen from this, there are a series of niremen 1-groups that oscillate around 9
in the speaker system. That is, it is a diaphragm (1), a voice coil bobbin (/ l), a damper (6), an
edge (2) or the like, and these elements have a certain weight, as a matter of course. And when it
moves in a certain direction or something with a certain weight, in this case it is always the case
to generate repulsive force in the opposite direction, when it does not jump out to the diaphragm
(1) or forward, The frame (3) generates a force that pushes the baffle surface backward, and
conversely, when the diaphragm (1) retracts backward, a force that causes the baffle surface to
pop forward is generated. And, this force deforms and vibrates the baffle surface, causing the
baffle surface to be transformed into another sound source different from the speaker. Naturally,
the cabinet 1 originally includes the baffle surface 1 Even though the whole is a place where any
vibration or sounding should not occur, in the prior art, this part is sounding vibration 9 under
the reaction of the speaker units 1 to 6 . And, of course, this has caused various harmful effects.
First of all, even if the baffle surface of the base of the speaker unit vibrates, it naturally distorts
the sound signal emitted from the speaker unit into an inaccurate one. This also means that two
different sounds mix into the sound of the unit l, as the cay net itself is two different sound
generation sources, and in the prior art, as described above, it is undesirable. Where the reaction
force to the speaker unit 1 has become one of the technical bottlenecks for accurate sound wave
generation, how does the prior art deal with this problem? One is to increase the rigidity of the
baffle surface. In this way, the baffle surface does not deform much, even when receiving
repulsive power from the speaker. Even so, however, there can not be a baffle surface that is
rigid enough to completely suppress deformation on the order of 1 micron. Therefore, this
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method has its own limitations.
Fix the speaker unit to the inside of the cabinet or to the bottom of the cabinet instead of the
baffle surface, and let only the face appear on the baffle surface. In this method, which is also
known, the vibration of the baffle surface itself can be considerably suppressed. However, on the
other hand, the cabinet 1-the entire pronunciation problem is not expected to be improved at all,
because the constant reaction energy source. Since the cabinet has only moved from one place to
another within the cabinet l ~, the reaction from the speakers received by the cabinet has not
changed at all, as in the prior art. In the present invention, it is customary to devise not to cope
with the reaction itself from the speaker itself, but to leave the reaction that has been caused 2 ',
so that it is unlikely to have an adverse effect. An object of the present invention is to provide a
mechanism that can radically solve the problem of the reaction force that the speaker unit 1
generates. (Means for Solving the Problems and Actions) The present invention, the speaker
balancer is a mechanism aiming to radically cancel the reaction force generated by the speaker
unit, and FIG. 1 is a side view of the present invention. As you can see from this, please see here.
7 The invention of the present invention is the same as the speaker's magnetic circuit behind the
speaker unit 1-mounted 180 degrees reversely, the diaphragm ( 1) There is an element called
“Balance Way l-(],],),” instead of 1) This Balancer has an element connected to the Balancer
Voice Coil Pobin (14), which is a speaker behind the net 1 to the work circuit The same current is
distributed to 9 as the current flows. As a result, the balancer voice coil povin (14) and the
balance weight (11) vibrate back and forth in the magnetic circuit. And by doing so, the balancer
will generate a speaker, and it will generate an inertial force just in the opposite direction, so
Figure 1 shows how the present invention, the speaker balancer is functioning, so please refer to
. As can be seen from this, when the speaker diaphragm (]) does not pop out forward, the balance
way l- <11) of this balancer does not pop out backwards. This balanceer's balance weight (1)
retracts forward when it is recessed into the speaker diaphragm (1) or back. The repulsive force
generated by the speaker unit is always canceled by the repulsive force generated by the
balancer behind the speaker unit.
Therefore, even if the vibration plate vibrates too much, as long as this balancer continues to
function, such an extra reaction force that causes the baffle surface to vibrate is not generated at
all. Is. It is based on the idea that the counter force opposite to that generated by the speaker unit
is produced by the balancer, thereby neutralizing the counter power of the two. Therefore, when
compared to the conventional non-draft measures, the baffle surface and the entire cabinet. In a
place where it is possible to suppress the phenomenon of producing the vibration 2 much more
effectively, And the invention of claim 3 must be described here. FIG. 5 is a side view of the
invention of claim 2 and FIG. 6 is a side view of the invention of claim 3. Please refer to each of
them. As can be understood from the following, both 1 are the development and improvement
versions of the speaker balancer of claim 1. First, the invention of claim 2 of FIG. 5 will be
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described, but in the present invention, an element called balance weight edge (12) is added to
that of claim 1. The function of the nirel 1 is to connect the balance weight (11) and the balancer
frame <] 3) in a state where the balance is movable. Of course, as can be seen from Fig. 2, even if
the balance weight edge (12) does not exist, there is no problem with the function of the
balancer, but the vibration motion of the speaker and the vibration motion of the balancer are as
close as possible. And, although there are two types of elastic elastics 1-(edge (2) and damper (6))
on the side of one speaker, one type of balancer damper (] 6) on the side of the balancer If there
is only one elastic nilemene, there are some problems. This is because it causes a slight
difference in the vibration motions of the two while it causes no difference. In consideration of
such a possibility, it is devised that the vibration motions of the two are made as close as
possible. It is an improvement plan of paragraph 2. Further, in this invention, which should be
mentioned also in the invention of FIG. 6 and claim 3, the balancer has exactly the same
constitution as the speaker unit). In other words, it has the diaphragm and the edge firmly, and as
a natural consequence, this balancer sounds exactly the same as the speaker unit behind it.
The design concept in that case is one of the following, which is the task of matching the
vibration motions of the speaker and the balancer, ie if you try to make the vibration motions of
the two completely match, the vibration of the speaker The presence of air before and after the
board can not be ignored. That is, air is present in front of and behind the diaphragm of the
speaker, which functions as a kind of spring that makes it difficult to move the diaphragm. And, if
the diaphragm is missing on the side of one balancer, the difference in the vibration motion of
one of the two will be different by the resistance of the air. Therefore, one rule of the balancer is
to aim as closely as possible to one's vibration motion as much as possible by giving the
diaphragm and the edge in the same way as the speaker unit. One of the problems is the sound
generation efficiency of the speaker unit. As you can see from the above explanation, driving the
balancer requires exactly the same amount of power as driving the speaker unit, that is, the
speaker with the balancer is the same size Compared to speakers without balancers. Roughly
speaking, it consumes nine times more power. That is because it is an element that is completely
nonfunctional and consumes only that power when viewed from the viewpoint of a single tone
generation by the balancer. Therefore, it is a second aim of the invention of claim 3 that the
balancer itself is made to have a sound generation ability comparable to that of the speaker unit
to enhance the electric sound generation efficiency. The above is Claim 2. And the invention of
claim 3. (Embodiment) FIG. 4 is a side view of an embodiment in which the invention of claim 1 is
applied to a 3-way speaker. In this figure, the cabinet and each speaker unit are depicted as a
cross-sectional view. As you can see from here, each unit for treble, mid-tone and bass has its
own balancer behind it. FIG. 7 is a side view of an embodiment in which the invention of claim 3
is applied to a two-way speaker. In this case, there are four speaker units but this is a speaker for
one channel. The four speakers form a balancer combination in two. In other words, when viewed
from one of the speaker units, the speaker unit behind it also plays the role of a balancer for the
speaker. (Effect of the Invention) With the introduction of the present invention, the speaker unit
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is generated. Induced vibration will be suppressed very effectively.
Therefore, a speaker incorporating the present invention will be able to reproduce the waveform
extremely accurately in comparison with a speaker constructed only by the prior art alone. If the
present invention is introduced, the cabinet is necessary. With the minimum weight and stiffness,
it will be sufficient. 】 3
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a side view of the invention of claim 1;
Figure 2 illustrates how the diaphragm of the conventional speaker generates 1 reaction force
Figure 3 illustrates how the speaker with balancer vibrates Figure 4 The side view of an
embodiment in which the invention of claim 1 is applied to a 3-way speaker FIG. 5 is a side view
of the invention of claim 2 FIG. 6 is a side view of the invention of claim 3. FIG. 7 is a side view of
an embodiment in which the invention of claim 3 is applied to a two-way speaker. (1) diaphragm,
(2) end (3) frame, (4) voice coil bobbin (5) winding coil, (6) damper (7) play 1-(8) center ball (9)
magnet, (10) ) Junction plate (1) Balance weight (12) Balance weight edge (13) Balancer frame] 4
(] / l) (] 5) Balancer voice coil bobbin Balancer winding coil balancer Damper balancer plate
balancer Damper ball balancer magnet
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