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JPS5359413

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DESCRIPTION JPS5359413
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03-05-2019
1
Speaker device
3. Detailed Description of the Invention The present application is such that the sound emitted
from the speaker does not become a point sound source, and the presence can be freely changed.
It is known that several users of a differential user who can refract or diffract the direction of the
sound wave in the front of the speaker in order to improve the directivity of the speaker in the
front of the speaker, i.e. In the present application, a reflector is provided which can change the
direction of the sound wave generated by the speaker arbitrarily in the middle of the
transmission path, and it does not stop refracting or diffracting the direction of the sound wave
in any direction. In some cases, a sound field that can resonate is provided between the speaker
and the reflector so that the characteristics of the sound can be changed. Therefore, the former
known differential user merely improves the directivity of sound and does not improve the sound
effect according to the place where the differential user is attached, but in the present application
According to the place where the device according to the present invention is placed, arbitrary
directional characteristic acoustic characteristics can be obtained. The invention will be described
using an example. In FIG. 1, reference numeral 1 denotes a cabinet such as a radio receiver and a
speaker box. A speaker 4 is fixed to the inner wall of the cabinet 1 so as to cover the cabinet 10
circular opening 3. It is open. The two projections 6.7 are parallel to one another and laterally
elongated from the diameter of the opening 3 towards the cabinet 1. A plate-like rubber plate 8.9
is fixed to the surfaces facing each other of the protrusion 6.7. A fixed shaft 11 is provided at one
end of the rectangular radiation plate 10. The shaft 11 having the radiation plate 10 is rotatably
attached to the protrusion 6.7 at a plurality of intervals so as to be perpendicular to the two
protrusions 6.7. If all the radiation plates (10, 1O 110 ? ?...) Are rotated in the same direction,
the radiation plates (10, 10 ?, 10 ? ?...) Overlap and the opening 3 of the cabinet 1 You can
also cover all of them. The length of the a side of the radiation plate '(10, 10', 16 '...) ... 2 \ ?, the
projecting part 6.70 The radiation plate (10, 10 on the rubber plate 8.9 opposite surface) The
radiation plate does not rotate naturally due to a bite into the end of 10, 1, 0...). The length of the
rubber plate (the length of the rubber plate) of the protrusion extending in the direction
perpendicular to the main plane of the cabinet is longer than the length of the b side of the
radiation plate. Because of the above-described structure, in order to change the radiation
direction of a part of the sound emitted from the speaker 4, the corresponding radiation plate
may be rotated against the pressure of the rubber plate by a predetermined amount.
Also, in order to stop the sound emitted from between any radiation plates as necessary, the
radiation plates may be rotated and brought into contact with each other. FIG. 4 is another
embodiment. In this embodiment, the radiation plate can be moved back and forth with respect
to the above embodiment and can be rotated as in the above embodiment. Thus, the space
03-05-2019
2
volume formed between the speaker cone 14 and the radiation plate can be varied. The same
reference numerals as in the above embodiment denote the same parts. The point of difference
from the previous embodiment is that the radiation \ 7: 2 = .pi.:. Pi.::Nini=WL to allow each
radiation plate to be able to move back and forth alone. In order to increase the volume of space
that can be created between the cone paper and the radiation plate of the speaker now, if each
radiation plate is pulled forward by a predetermined amount, the rubber plate on the opposite
surface of the projecting part Since both ends are crimped and held, an arbitrary space volume
can be obtained. The radiation plate can also be rotated as in the previous embodiment. FIG. 5
shows still another embodiment. A speaker 16 is disposed on one side across the sound field 15,
and a radiation plate 17 is disposed on the other side, and the radiation plate is made of a flexible
material and is shaped like a wave diaphragm, as shown in FIG. You can pull 18 to the front. The
sound emitted from the speaker 16 passes through the sound field 15 and is emitted to the
outside from the opening 19 of the radiation plate 17. At this time, part of the sound emitted
from the opening portion is diffused on the reflection surface 20 of the radiation plate 17. Here,
since the radiation plate 17 is flexible and is deformed as shown in FIG. 6, the diffusion direction
of the sound emitted from the opening 7-9 can be changed. On the other hand, the sound field
15 sandwiched between the speaker 16 and the radiation plate 17 can change the volume of the
sound field by moving the radiation plate 17, so that the characteristics of the sound can be
changed. Although not shown in the present embodiment, a holding device for holding the entire
flexible shape of the radiation plate can be provided as appropriate with EndPage: 5.
4. Brief Description of the Drawings FIG. 1 is a cross-sectional view of an embodiment of the
present invention, FIG. 2 is a perspective view thereof, and FIG. 3 omits the number of radiation
plates and It is the front view made straight. FIG. 4 is a cross-sectional view of another
embodiment. FIG. 5 is a perspective view of still another embodiment, and FIG. 6 is a perspective
view of the radiation plate with the central portion of the radiation plate of FIG. 5 drawn to the
front. ????????????? 2 ..... inner wall. 3--... opening. ??????????? 5 иии
External wall. 67 ииииииии Projections. 8.9 и и и и rubber plate. 10 иии Radiation plate. 11 ... axis. 12 ...
groove. 13 ...... groove. 14 ? ? ? Corn paper. . 15 ... sound field. ???????????? 17
иииии Radiation plate. Patent Assignee Shin-Shirosa Electric Co., Ltd. EndPage: ?
03-05-2019
3
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