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Chief of Patent Office, 58o9. . ??? (Ilh'32) [Phase] Japanese Patent Office Open Patent
Publication ? Japanese Patent Application Laid-Open No. 50-42838 Office number 646555 IjIm
Book Llm-Spelled speaker am 1 L tatami-Request category ? Vibration I [both pictures O circle
The sound of the sound wave emitted from the vicinity of the center of this diaphragm in one
integral space; The cylinder body which can be seen by the company ta 1-remark The front of the
diaphragm K11 body tll, tt * xt-pfct K-"t'h * Generally speaking, the diameter of the diaphragm of
the sound source is smaller than the wavelength of the light. The spherical wave and the strange
sound St drawn as the center of the spread uniformly in * The sound pressure and other states
are all uniform on one spherical drawing. In addition, it is known that the sound IIO diaphragm
travels straight to the front of the phrase such as the sound Il, when the length of the sound IIO
diaphragm is sufficiently large compared with the wavelength of the sound. Then, conventionally,
a cone speaker such as that shown by 1k (alK) is known using such sound wave properties. -A
conical cone tAII is constructed such that its bite m is supported by an edge i wheel and the other
end is driven by a Zice coil O, and a cone K is provided with a dustproof character 71141; There
is. In addition, the characteristic of this speaker is as shown by the frequency # 11 ? ? ? 113
(b) K. I11 Figure ? 1 central axis voice direction of the broken aI? diaphragm (axial direction
t?. The sound pressure level in the direction of 30 'from the central axis of 11 l m, and the
dashed line is the sound pressure level in the direction of 60' from the central axis. However, as
described above, when the length of the sound diaphragm is larger than the wavelength of the
sound, the sound waves radiated from the mid band to the high band in the double band 11113
(b) depend on the angular direction As the sound pressure level becomes KJ6 recommendation
plane wave greatly, it becomes KII tropism sharp vk 41 property as shown by equal sound
pressure silver at IIE III (--sby * of @-@ y at-). However, when considering the use of the room
reflection sound when using this speaker t *-for a single use, etc., the ?T ? speaker has a wider
directivity! It will be worn 0. If the speaker of this EndPage: 1 is an effective vibration radius aes.
Because the tearing number characteristic is degraded, the high frequency sound of the highquality sounding speaker system, which usually consists of t-2 ways or more, is interrupted by an
electric filter to interrupt higher frequencies. Shi-WA Teway system is formed.
However, in addition to the fact that the electric filter is expensive, the high frequency signal not
intercepted by the electric carp A- at this time also works to make the sound quality of the high
frequency side speaker band excellent. As is apparent from FIG. 1 (and more clearly, as the
frequency is high, the cone-shaped paper diaphragm itself produces interference at the mutual
edge, thus giving a sharp peak and valley to the sound pressure. The present invention has been
made in view of the above-mentioned drawbacks and provides a speaker device which has good
directivity and wider directivity as well as prevents interference between the diaphragms and
interrupts the high frequency component of the blue color. It is to be. In the following, the same
parts will be described with the same reference numerals with reference to FIG. In Fig. 2 + (a) in
Fig. 11, the conical cone is supported by its open end and its other end S which is the other end
is driven by Pois; Ne K is a dustproof cap a # is commonly used. Then, an inverted conical tube
CtU having a cross-sectional shape having a bulged tube at its central portion in the space of the
cone weir, which constitutes eight bodies, is supported by the arm @ near the center in the cone
space. The cylinder all is supported by the armrest, and the member ? is fixed to the speaker
enclosure ? together with the edge az. By acting on the voice car A (131), the frequency
characteristic Fi near the front of the vibration IIIL becomes a characteristic shown by blK.
??? In Fig. 2 (b), the broken line is the central axis direction (axis direction ? ░) of the
peristaltic plate (the axial direction ? ░), and the sound pressure level I l [la! Sound pressure
level A in the direction of 30 ░ from the central axis of the lamp, chain at; sound pressure level
in the direction of 60 'from the central axis of r. Here, it is apparent that the frequency
characteristics of the conventional cone speaker shown in FIG. 1 (bl and FIG. 182 (b) according to
the present invention) are compared with each other, as shown by deer and others. When this is
done, the difference in sound pressure level in each direction in the mid-range power and highpitch range is also extremely small. Therefore, as indicated by the pressure at 112ml I (m Svi ?
? i 1iil-breaking at! The sound pressure level of theory ? is averaged ?? ?, and the directivity
of the sound wave in the wave region becomes poor. That is, in an eight-concave space with a
cone of movement 114, it is released from the central vicinity among the sound 1il emitted from
the diaphragm and by the pressure from the kernel in the inverted conical cylinder 1m. The
sound wave increases the movement of the wave) through this tube, so that the phase can be
advanced in a qualitative manner.
As described above, when the diaphragm length is larger than the wavelength of the sound, the
sound Il &! Although it becomes a flat III wave, it will be going straight and straight l1iK. By
advancing the phase of the sound wave near the center, the sound wave 0fILWr8 can be made to
approach the sphere wI ? substantially at the opening surface of the speaker. That is, since the
sound wave spreads in four directions, it is possible that it is a directional tube. As it is apparent
that 1m 111 (b) clearly shows that the high frequency component can be determined compared
to the conventional frequency 411 of the cone speaker, it is possible to use other fire evacuator
tubes without any problem. High frequency components can be interrupted. Conventionally, the
speaker for the bass at l111iL at the Suka Kas Dem t-29 ray or 3 way, the high j l wave
component is interrupted and the mineral filter or Lc filter is used to interrupt it. . However,
according to the invention Ki, it is possible to interrupt the high frequency component by
strangely acoustically by providing the inverse conical cylinder 1 in the cone space without using
these expensive electric film #. . More than I! In the case of using an inverted conical cylinder
with a bulge at the center as shown in FIG. By using an inverted conical cylinder with a certain
thickness, a cylinder is produced that radiates from the central vicinity of the one tatami d cone
which has the effect of the same machine and advances the phase of the wave by 9 It may be of
any shape d. According to the present invention, it has a thin cylindrical shape with a thin
thickness, and the weight is extremely light-weight, which is good. EndPage: 2 Moreover, the
material of this cylinder can not be limited to the crucible, and it can be formed into an inverted
conical cylinder which advances the phase of the sound wave, regardless of metal, II fat, etc. Any
material that does not cause resonance may be used. For example, by forming this cylinder with a
material that can be easily pressed by a plastic or the like, the cylinder t91 kVC can be
manufactured, and a cylinder lighter in weight can be obtained. As described above, according to
the present invention, by providing a cylinder having a square shape, it is possible to interrupt
the high range where the interference between the diaphragms is caused by the 5? mutual
interference, and thus it is expensive. It is possible to obtain a speaker t- having a wider
directivity of sound waves in a high frequency region without using a filter.
4, Brief description of the drawings 11 Q (a) (bl is a schematic configuration of a conventional
cone speaker !! iI and its frequency characteristic diagram, FIG. 2 (a) (bl (c) is a schematic block
diagram showing a part of the speaker according to the invention in 11h plane and its ?
number-and (- The surface view and the figure 3 are schematic block diagrams showing another
embodiment according to the present invention. 11 иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Dust
protection cap 21 иииииии Tubular body, 22 ииииии Arm 1 pipe (?) 5001000, 200051 to D + 0000 500
2 0005 50016062000500010006 sub i11 soft fi 4 Z) (C) 3 w End Page: 3-1-list of attached
documents ?) 1 letter of attorney (2) one statement (3) Drawing 1 (4) Requests Sub-application
1, 6, Inventors other than the above, patent applicants or agents (1) Inventors agent EndPage: ?
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