JPH056993

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DESCRIPTION JPH056993
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
stacked, connected, removable speaker cabinet, and more particularly, a plurality of speaker
cabinets can be easily stacked and connected without any loss of clarity due to phase
interference. The present invention relates to a stacked, coupled, rotatable and detachable
speaker cabinet which is arranged on an axis and which can be rotated by connection plates,
changing directivity characteristics as desired, and obtaining appropriate sound effects safely
and easily.
[0002]
2. Description of the Related Art (1) A sound wave generated from one point propagates in the
air as a spherical wave and attenuates in inverse proportion to the square of the distance. It
requires a sound source with high sound pressure and uniform wide directivity characteristics to
transmit sound over a wide range, and the position of the sound source as high as possible to
reduce the influence from the audience and structures to increase the clarity of the sound. Need
to be installed in It is necessary to use multiple speaker cabinets as one speaker cabinet, which is
a sound source, can not obtain required sound pressure and wide directivity characteristics and
can not change directivity characteristics. Although two or more units are often used in parallel,
many efforts have been made to prevent the adjacent sound sources from adversely affecting
phase interference. The sound waves generated from a plurality of juxtaposed sound sources
interfere with each other and cause peaks (peaks) and dips (valleys) due to path difference (phase
interference), becoming more pronounced as the high-frequency band with a short wavelength is
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obtained. It has a large influence, and it has sound pressure directivity characteristics like the
leaves of a hazelly, and there are adverse effects such as a difference in clarity depending on the
listening position. (2) In order to reduce the influence of phase interference of adjacent speakers
and cabinets, horn and speakers for the high frequency range are made sharp directivity
characteristics in advance, and they are trapezoidal so that many shapes of speaker cabinets can
be arranged in a fan shape. Some of the recent medium-to-small-sized speakers and cabinets (for
example, MEYER, APOGEE, DELTAMAX, etc.) are originally sound pressure directional
characteristics of leaf-shaped soundings of mistletoe, but using combinations of directivity
characteristics of horns and speakers and shapes of speakers and cabinets Although the
directivity characteristics have been improved, it is necessary to consider the specified angle (not
directed to any angle) (MEYER etc.), most speaker cabinets are mounted on a stand or bracket
and placed at high height It is done. (3) A plurality of high-range speaker cabinets mounted at
arbitrary angles and having a wide pointing angle (BOSE) etc. have been proposed, which are
convenient in small-scale venues, gathering venues, etc. Yes, if you need more sound pressure, it
is more effective to replace it with another powerful model. These speaker cabinets are also
mounted on a stand, a bracket or the like and arranged at a high place.
[0003]
However, the conventional techniques of (1), (2) and (3) described above can not avoid the
following defects. (1) If an ordinary speaker cabinet is arranged adjacent to a fan in order to
obtain a wide service area, the clarity is reduced due to the phase interference described above,
and if the sound pressure is further increased to improve the clarity, howling etc. (2) If the
speaker cabinet is not oriented toward the specified angle, phase interference occurs and the
specified angle can not be changed. (3) In order to obtain larger sound pressure, remodeling
work is required for larger models.
[0004]
SUMMARY OF THE INVENTION The present invention is intended to eliminate various
drawbacks in the case of stacking and arranging the conventional speaker cabinets as described
above, the gist of which is a positive having a speaker unit. A face plate, an upper face plate
having an opening of a desired shape, and the same shape as the opening of the upper face plate,
and fitting into an identical shape fitting hole of an upper face plate of an adjacent lower speaker
cabinet The connection plate is provided to project downward, and the base fixed to the bottom
plate; and a plurality of the connection plates fitted in the fitting holes of the upper plate of the
lower speaker cabinet are connected, rotated and removed. It is a speaker cabinet configured as
free.
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[0005]
DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred embodiments of the claimed
invention will be described with reference to the attached drawings. The preferred embodiment
of the present invention is described in the following: In the embodiment in which the fitting
connection portion is made of wood in the cabinet 10, as shown in FIGS. 1 to 7, a circular
opening 12a is formed at the center of the front of the rectangular front plate 12, and the
speaker unit 20 is formed in the opening 12a. And small openings 12b are formed at the lower
corners of the front plate 12 to provide phase inversion holes for improving the low range
characteristics.
An opening 14a of a desired shape, for example, a triangle, is formed in the upper surface plate
14, and nut fitting holes 18, 18 are formed on the bottom plate 16 outside the corresponding
portion of the triangular opening 14a of the upper surface plate 14 The nuts 18a, 18a are fitted
and fixed in the fitting holes 18, 18, respectively.
[0006]
As shown in FIGS. 4 and 5, small diameter bolt through holes 30a and 30a are bored in the base
plate 16 corresponding to the fitting holes 18 and 18 on the surface of the pedestal 30 having a
required thickness and area. Small diameter bolt through holes 34b, 34b, 34b are drilled at equal
intervals near the circumference of the disk 34 having a required diameter and thickness, and a
triangular connecting plate having a shape and thickness substantially corresponding to the
triangular opening 14 Small diameter bolt through holes 38b, 38b, 38b are drilled at equal
intervals at corresponding locations of 38, and small diameter bolt through holes 30b, 30b, 30b
are drilled at regular intervals at corresponding locations of the pedestal 30 surface, The small
diameter bolt through holes of these three members are made to coincide with each other, and
the small diameter countersunk bolts 36 are respectively penetrated through the respective small
diameter bolt through holes 38b, 34b and 30b, and the triangular connection plate 38, the disk
34 and the pedestal 30 Together
[0007]
In FIGS. 6 and 7, the small diameter bolt through holes 30a, 30a of the pedestal 30 are matched
with the nuts 18a, 18a of the bottom plate 16 of the speaker cabinet 10, and these small
diameter bolt through holes 30a. , 30a and nuts 18a, 18a, the small diameter countersunk bolts
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36, 36 are screwed to fix the pedestal 30 to the bottom plate 16.
[0008]
An embodiment in which the fitting connection portion is made of metal will be described with
reference to FIGS.
A circular opening 12a is formed at the center of the front face of the rectangular front plate 12
of the speaker cabinet 10 as in the previous embodiment, and the speaker unit 20 is provided in
the opening 12a. A phase-reversal hole small aperture 12b for improvement of the range
characteristic forms a circular aperture 14a in the upper surface plate 14, and a nut is fitted on
the bottom plate 16 outside the corresponding portion of the circular aperture 12a of the upper
surface plate 14 Holes 18, 18 are bored, and nuts 18a, 18a are fitted and fixed in these nut
fitting holes 18, 18, respectively. As shown in FIGS. 12 and 13, small diameter bolt through holes
30a and 30a are drilled in the corresponding portions of the bottom plate 16 with the nut fitting
holes 18 and 18 on the surface of the base 30 having the required area and thinner thickness
than the above embodiment. Do. Small diameter bolt through holes 34b, 34b, 34b are drilled at
equal intervals near the circumference of the disk 34 having a required diameter and thickness,
and a triangular connecting plate having a shape and thickness substantially corresponding to
the circular opening 14a Small diameter bolt through holes 38b, 38b, 38b are drilled at equal
intervals at corresponding locations of 38, and small diameter bolt through holes 30b, 30b, 30b
are drilled at regular intervals at corresponding locations of the pedestal 30 surface, The small
diameter bolt through holes of these three members are made to coincide with each other, and
the small diameter countersunk bolts 36 are respectively penetrated through the respective small
diameter bolt through holes 38b, 34b and 30b, and the triangular connection plate 38, the disk
34 and the pedestal 30 are obtained. And the nuts 18a, 18a of the bottom plate 16 of the
speaker cabinet 10 and the bolt through holes 30b, 30b of the pedestal 30 are aligned with each
other in the same manner as in the previous embodiment. 1 a bolt through hole 30b, screwed the
bolts 36, 36 into and 30b to secure the pedestal 30 to the bottom plate 16 of the speaker cabinet
10
[0009]
Referring to FIGS. 12 and 13 showing still another embodiment of the present invention, a
counterbore cutter (not shown) is used to form a fixed width and depth at a desired shape on the
top plate 14 of the speaker cabinet 10. A recess 15 is formed, and small diameter bolt through
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holes 15a, 15a,... Then, the recess 15 has an area and a thickness corresponding thereto, and
another shape, ie, a triangular opening 16b is formed, and the small diameter bolt through hole
16a is also formed at the corresponding position of the small diameter bolt through holes 15a,
15a. A fitting plate 16 in which 16a... Is bored is fitted, and bolts are fitted in the bolt through
holes 15a, 15a... 16a, 16a.
[0010]
According to the present invention, according to the present invention, the triangle connecting
plate 38 of the pedestal 30 provided on the bottom plate 16 of the upper surface plate 14 of the
lower speaker cabinet 10 is used. The upper and lower speaker cabinets 10 and 10 are stacked
and connected by fitting into the opening 14a and partially rotating through the cabinet 10
[0011]
Effect of the Invention (1) When obtaining a wide service area in a performance hall, a gathering
hall, etc., the stacked connected, removable speaker cabinets 10, 10. The connection plate is
fitted into the opening 14a of the top plate 14 of the adjacent lower speaker cabinet 10, and only
by slightly rotating the pedestal 30, the required number of stacks are connected and connected
(2) vertically adjacent in this manner If arranged, the intelligibility due to phase interference does
not decrease, and even if the sound pressure is further raised, howling does not easily occur. .
(3) Even if the speaker cabinet is not oriented to the specified angle, the directivity angle can be
changed because phase interference does not occur. (4) It is not necessary to remodel to a larger
model in order to obtain a larger sound pressure. (5) In a performance hall, a gathering hall, etc.,
the speaker cabinets 10, 10. , Fall, hard to collapse.
[0012]
【0012】
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