close

Вход

Забыли?

вход по аккаунту

JPH10108285

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 JPH10108285
[0001]
TECHNICAL FIELD The present invention relates to a speaker system using a planar baffle.
[0002]
2. Description of the Related Art Conventionally, in direct radiation type speakers, sounds in
opposite phase to each other are emitted from the front and back of the diaphragm. Although the
radioactivity rate of the speaker was significantly reduced, as shown in FIG. 10, this was
prevented by providing a baffle plate b in the speaker a. In order to fully exploit the basic
performance of the speaker, it is ideal to use an infinite baffle plate to completely separate the
sound radiated from the front and back of the diaphragm. As a realistic type of baffle plate, a flat
plate baffle which is a mere finite flat plate, a flat plate baffle folded in the middle from the
middle into a box shape, an open rear face type baffle having an open rear face, a closed rear
face type baffle Also known is a closed baffle, and a phase-reversed baffle in which a kind of
acoustic pipe called a port is installed in front of the closed baffle in parallel with the opening of
the speaker.
[0003]
SUMMARY OF THE INVENTION In the above-described conventional baffled speaker system, a
plate material such as wood is mainly used as a material of the baffle plate, and the sound
03-05-2019
1
radiated from the front and back of the speaker is the enclosure Echoes that are reflected from
the wall and hit the baffle surface, and resonance noise between the flat baffle and the speaker
have a bad influence on the reproduced sound. In order to reduce this resonance, measures have
been taken to offset the speaker mounting position from the baffle center position, to divide the
baffle plate itself, etc., but this has not yet resulted in a definitive solution.
[0004]
The present invention is a flat baffled speaker system having a material and structure that
minimizes the resonance of the baffle plate due to the vibration of the speaker and the sound
emitted from the speaker, and the reflected sound from the wall of the enclosure and the like
striking the baffle surface. Intended to provide.
[0005]
[Means for Solving the Problems] n (n ≧ 2) intermediate members and n + 1 plate members are
prepared, and these intermediate members and plate members are separated between the plate
members and the plate members. The intermediate materials are alternately bonded to each
other to form an n-layer flat plate.
The shape of the intermediate material is such that an air gap is generated between the plate-like
body and the plate-like body, and the air gap is continuous to the end face of the n-layer flat plate
and is opened outward at the end face It is a thing. A plate having such an n-layer flat plate, or
one having a hole of any shape formed at a plurality of locations of a plate and an intermediate
material so as not to penetrate the front and back of the n-layer flat plate is a baffle plate 2 I
assume. A flat baffled speaker system is configured by opening a mounting hole in the baffle
plate 2 so as to be continuous with the air gap and mounting a speaker in the mounting hole.
[0006]
Replacing the n-layer flat plate with another one is also effective for the reason described later.
That is, when the above-mentioned is used as a first n-layer flat plate, one in which plate
members are attached to both surfaces of an intermediate material is used as a single-layer flat
plate and n single-layer flat plates are adhered to each other As a second n-layer flat plate.
Hereinafter, when referring to the n-layer flat plate, any one of the above two types is meant.
03-05-2019
2
[0007]
Here, it is effective to use, as the intermediate material or the plate-like body, a material that
hardly resonates with the vibration of the speaker and the sound emitted from the speaker. In
addition, for the reason described later, an n-layer flat plate is made of corrugated paper using a
paper sheet formed in a wave shape as the intermediate material and using a thick paper for the
plate-like body, and the gap is in the horizontal direction to the end face of the baffle plate 2 It is
also effective that the baffle plate 2 is disposed so as to be continuous with and open to the
outside.
[0008]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment will now
be described with reference to the drawings. 1 to 4 show a first embodiment of the present
invention. In this embodiment, the baffle plate 2 is a corrugated board. That is, a corrugated
paper is used as the intermediate material, and a thick paper is used as the plate-like body, and
the thick paper has a three-layer structure sandwiching the corrugated paper. Also, although
holes 5 (or 6) are drilled in the front and back layers of this three-layered corrugated board, the
shape of the holes 5 (or 6) is circular and the location and size of the holes 5 (or 6) are A random
number is determined, and the intermediate layer is not pierced to form the baffle plate 2. Then,
the speaker mounting hole 8 is opened at the center of the baffle plate 2 to attach the speaker 1,
and the baffle plate 2 with the speaker is fixed to the support base 7.
[0009]
Here, a large number of cylindrical gaps 11 are formed by sandwiching the corrugated paper
between the thick paper and the thick paper, but the corrugated board is made so that the
directions of the air gaps 11 are the same in all three layers. When the baffle plate 2 is fixed to
the support 7, the direction of the air gap 11 is fixed so as to be horizontal to the ground.
Referring to FIG. 6, this air gap 11 is shown simply by the line drawn horizontally to the baffle
plate 2. The air gap 11 communicates with both ends of the baffle plate 2 and is open to the
outside at the end, the hole is spatially continuous with the air gap 11, and the speaker mounting
hole 8 is spatially continuous with the air gap 11. It takes The reason is that a part of the sound
emitted from the speaker 1 is emitted from the end of the baffle plate 2 through the air gap 11.
Moreover, the reason for making the direction of the space ¦ gap 11 level with the ground is for
03-05-2019
3
adjusting to the position of a human's both ears. That is, it is intended that the sound from the
right and left of the both ends gives the sense of reality and the three-dimensional feeling of
sound rather than the sound from the upper and lower of the baffle board both ends.
[0010]
Further, as shown in FIG. 5 as the second embodiment, the sound absorbing material 10 is
adhered to both the front and back sides of the baffle plate 2 excluding the speaker mounting
hole, and the speaker protection net 12 is covered on the front surface of the baffle plate. It is
also effective. By bonding the sound absorbing material 10, the echo sound generated by the
sound radiated from the front and back of the speaker 1 striking the baffle plate 2 is reduced,
and the resonance is reduced and the weight is increased to reduce the reproduction sound. Area
characteristics are improved.
[0011]
In addition, the shape of the hole which lightened out a part of corrugated-cardboard board does
not need to be circular, and may be any shape. This is because it is preferable that the resonance
point of the baffle plate 2 is dispersed by making the hole, and the resonance sound between the
speaker and the baffle plate is not easily generated. The holes may be drilled with a hand using a
cutter, or may be opened using a mechanical cutter such as a circle cutter or Thomson. The
means for mechanically opening the holes is effective for mass production of the present
invention.
[0012]
Further, in the present invention, the direction of the air gap 11 does not have to be always
horizontal to the ground, and the shape of the air gap is not limited to a tubular shape. For
example, in the first embodiment, the direction of the air gap may be changed to be
perpendicular to the ground in all three layers, or only the direction of the air gap in one of the
three layers may be changed to be perpendicular to the ground Also good. Furthermore, as
briefly shown in FIGS. 7 and 8, the direction of the air gap 11 may extend radially outward from
the speaker attachment hole 8 or may extend in a spiral manner. Further, as briefly shown in FIG.
10, the direction of the air gap may extend vertically from the diagonal. That is, the direction of
the air gap 11 may be made to be the best according to the acoustic characteristics of the place
03-05-2019
4
where the present invention is installed.
[0013]
Also, the reason for using the corrugated board in the first embodiment is that it is difficult to
cause resonance particularly in the low frequency range due to its nature, inexpensive, easy to
obtain, light in weight, easy to process and assemble. is there. However, in the present invention,
it is not necessary to use a corrugated board, and instead, one made of a resin or the like may be
used. In addition, the baffle plate does not have to be a three-layer structure, and has a structure
of two or more layers, and the holes from the baffle plate do not penetrate the front and back of
the baffle plate and sound from the front and back of the speaker As long as they do not interfere
with each other. Furthermore, in the present invention, it is not necessary to use paper as the
intermediate material, and the shape may be other than the wave shape. For example, even if a
spacer is used as the intermediate material, the same effect as the above embodiment can be
obtained.
[0014]
Then, as shown in FIG. 9, the present invention may be arranged side by side like a panel. This is
effective for wide indoor or outdoor use, such as for concerts and lectures.
[0015]
Also, although the structure of the baffle plate is described as the first n-layer flat plate in the
above-described embodiment, this structure may be replaced with that of the second n-layer flat
plate. The step of bonding a plurality of single-layer flat plates to form a second n-layer flat plate
is effective for mass production.
[0016]
And, in all the embodiments described above, the speaker mounting position of the baffle plate
does not have to be at the center position of the baffle plate. For example, a plurality of speakers
may be attached to a plurality of places of the baffle plate, or this may be used as a stereo device.
03-05-2019
5
[0017]
The speaker mounting hole is spatially continuous with the air gap, and the air gap is opened to
the outside at the end face of the baffle plate, so that part of the sound emitted from the speaker
passes through the air gap to the baffle plate As it is emitted from the end face, it is possible to
obtain a realistic live reproduction sound. Also, if the baffle plate is perforated so as not to
penetrate the front and back, the resonance point of the baffle plate due to the vibration of the
speaker or the sound radiated from the speaker is dispersed and the resonance is suppressed, so
the low frequency range of the reproduced sound Characteristics are improved. Here, if the baffle
plate is made of a material that does not easily generate resonance, such as thick paper or
corrugated paper, resonance is further suppressed and the reproduced sound in the low-pitch
range is improved.
[0018]
Brief description of the drawings
[0019]
1 is a perspective view of the first embodiment seen from the front.
[0020]
2 is a perspective view of the first embodiment seen from the rear surface.
[0021]
3 is a front view of the first embodiment.
[0022]
4 is a cross-sectional view of the first embodiment.
[0023]
5 is a cross-sectional view of the second embodiment.
03-05-2019
6
[0024]
6 is a view showing an embodiment in which the direction of the air gap is horizontal direction.
[0025]
7 shows an embodiment in which the direction of the air gap is radial.
[0026]
8 shows an embodiment in which the direction of the air gap is spiral.
[0027]
9 is a diagram showing a speaker system in which the present invention is arranged in parallel.
[0028]
10 shows an embodiment in which the direction of the air gap extends vertically from the
diagonal.
[0029]
11 is a schematic view showing the relationship between the flat baffle and the speaker.
[0030]
Explanation of sign
[0031]
DESCRIPTION OF SYMBOLS 1 speaker 2 baffle plate 3 thick paper 4 corrugated paper 5 hole
formed in the surface 6 hole formed in the back 7 support base 8 speaker mounting hole 9
mounting bracket 10 sound absorbing material 11 air gap 12 speaker protection net a speaker b
conventional Baffle plate
03-05-2019
7
1/--страниц
Пожаловаться на содержимое документа