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JPH0623395

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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 JPH0623395
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
omnidirectional speaker suitable for any place such as a coffee shop, a raw band store, a wide
place and the like.
[0002]
2. Description of the Related Art In a conventional speaker, as shown in FIGS. 6 (a) and 6 (b), an
open rear end type in which the rear end of a cylindrical body 2 supporting the speaker 1 is open
or as shown in FIG. There is a speaker 1 at the top of the front of the box 3 and a bass reflex type
provided with an opening 4 below it, and a bass reflex type provided with a plurality of legs 6 at
the lower end of the cylindrical body 5 as shown in FIG.
[0003]
FIG. 8 (a) shows the closed type and the speaker 1 is provided at the opening of the front of the
box 7 closed at the rear, and FIG. 8 (b) shows the speaker at the upper end of the tapered
cylindrical body 8. The lower end of the cylindrical body 8 is sealed by a floor 9 in a sealed type.
[0004]
Further, a horn type speaker in which the speaker 1 is fixed to the rear end of the horn 10 is
shown in FIG. 9 (a), and a height from the floor 9 of the tapered cylindrical body 8 is shown in
FIG. If the height is set to the same height as the opening area, it becomes equivalent to the
bending horn.
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1
[0005]
Among the above-described conventional techniques, the open rear type in FIG. 6 (a) is
characterized by the deformation of the flat bass reflex as shown by the broken line and the bass
is light, and the closed type is characterized in that the bass is heavy.
[0006]
The bass reflex type has a medium sound effect.
[0007]
Although the above-mentioned prior art has respective features, there are advantages and
disadvantages, and it is necessary to use various types of speakers in combination to obtain a
good effect, There is a problem that a large space is required and the cost is increased.
[0008]
The object of the present invention is, in view of the problems of the prior art as described above,
to provide a non-directional speaker which can transmit high-quality, medium-level and lowpitched sounds in one direction and average sound in any direction. The purpose is to
[0009]
[Means for Solving the Problems] In order to solve the above problems, means taken by the
present invention is to combine two tapered support plates so that the plane becomes a cross
shape, and this combination The mid-tone speaker is placed in the recess formed at the upper
end of the two combined support plates, and the bass speaker is placed upward on the mid-tone
speaker, and a cone is placed further down with a space above it. The high sound speaker is
placed on it, the upper and lower open tapered cylinders are covered on the outer periphery of
the cross-shaped support plate, and the lower end of the support plate is provided with a
plurality of height adjustable legs. The gap between the body and the floor is adjustable.
[0010]
The present invention is configured as described above, and the sound of the bass speaker is
reflected by the upper cone and diffused to the surroundings, and a part of the sound of the bass
speaker and the sound of the middle speaker Flows downward through the cylinder and from the
gap between the lower end of the cylinder and the floor to the periphery.
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2
[0011]
Further, the sound from the treble speaker flows from the upper side of the cone to the
periphery.
And, by adjusting the length of the leg at the lower end of the cylinder, the features of the
speaker from the closed type to the open type can be exhibited.
[0012]
Embodiments of the present invention will be described below with reference to the attached
drawings.
[0013]
In the embodiment shown in FIGS. 1 to 5, reference numerals 11 and 12 denote tapered support
plates made of plywood, and concave portions 13 and 14 are formed on the upper end,
respectively.
[0014]
Further, a notch 15 is provided from the center of the lower end of the support plate 11 to reach
the middle of the support plate 11, and a notch 16 is provided to reach the middle of the support
plate 12 from the center of the bottom of the recess 14 of the support plate 12. .
[0015]
The support plates 11 and 12 formed as described above are assembled in a cross shape through
the engagement of the notches 15 and 16 as shown in FIG.
[0016]
Also, a pair of legs 17 are attached to the lower ends of the support plates 11 and 12
respectively.
[0017]
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3
The legs 17 are adjustable in length.
For example, as shown in FIG. 4, the cylinder 18 having an internal thread is fixed to the recess at
the lower end of the support plates 11, 12, and the external thread of the leg 17 is screwed on
the internal thread of the cylinder 18.
[0018]
A support stand 19 is rotatably mounted on the lower end of the leg 17.
[0019]
Further, a polygonal portion 20 for engaging a spanner or the like is formed at the lower portion
of the leg 17, and a spanner or the like is engaged here, and the leg 17 is rotated when the leg
17 is rotated. The height is adjusted while rotating up and down with respect to the female screw
of.
[0020]
Thereafter, the leg 17 is fixed by the lock nut 21.
Further, when the leg 17 is raised most, the support base 19 is drawn into the recess of the
support plates 11, 12, and the support plates 11, 12 contact the floor.
However, the thing of arbitrary structures other than the example of illustration can also be
utilized.
[0021]
Reference numeral 22 in FIG. 1 denotes a tapered cylinder which may be square or circular in
plan view.
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4
The cylindrical body 22 is placed on the outside of the support plates 11 and 12 assembled as
shown in FIG.
Then, the middle sound speaker 23 for making sound toward the periphery is fixed to the
concave portions 13 and 14, and the bass speaker 24 is fixed thereon so as to make a sound
upward.
[0022]
A plurality of columns 25 are fixed to the upper end of the cylindrical body 22, and a downward
cone 26 is fixed thereon.
Then, a high-pitched speaker 28 for making a sound around is fixed to the receiving plate 27 on
the cone 26.
[0023]
Next, the operation of the above embodiment will be described. The sound emitted from the
middle sound speaker 23 flows downward along the inner surface of the cylindrical body 22 and
the gap between the lower end of the cylindrical body 22 and the floor 29 From 30 go outside.
[0024]
Also, the sound from the bass speaker 24 is reflected on the cone 26 on it and is reflected to the
surrounding, but a part of the bass goes downward and goes down the inside of the cylinder 22
to the floor 29 It reflects and goes out from the clearance 30.
Furthermore, the high-pitched sound from the high-pitched speaker 28 comes out directly from
the surroundings.
[0025]
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5
In the above operation, as shown in FIGS. 5 (a) to 5 (e), when the leg 17 is maximized and the
lower end of the cylindrical body 22 is attached to the floor 29, the gap 30 becomes zero and the
sealed type The same effect as the speaker can be obtained.
Further, when the leg 17 is maximally extended and the gap 30 is maximal, the same effect as
the open type speaker can be obtained.
[0026]
That is, (a) of FIG. 5 is sealed when four bolts under the omnidirectional speaker are completely
screwed in, and (b) is a bass reflex when the bolt is 1 to 3 cm longer than the speaker, (C) is a
horn type if the height of the speaker and the floor is half of the bottom, and (d) is a back open
type if it is above the bottom.
Note that (e) is obtained by reversing the top and bottom of the speaker shown in (d).
[0027]
As described above, according to the present invention, two tapered support plates are combined
so that the plane becomes a cross by engagement of the notches, and the combined two supports
Since a plurality of speakers are fixed to the cross-shaped recess formed at the upper end of the
plate, the strong repulsive force of the speakers can be received with a simple structure.
(The repulsive force of the speaker reaches 100 G) Therefore, many speakers can be supported
in a stable state.
[0028]
Also, since three types of speakers, low, medium and high, are mounted one on another, the same
effect as in the case of using a plurality of speakers can be obtained by one device of this
invention, and Space required for installation compared to the method of separately arranging
and using
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[0029]
Furthermore, since the cylindrical body is tapered and has no parallel surface, a standing wave is
not generated, and a bland and straight sound is produced.
[0030]
[0030] Further, by covering the outer periphery of the cross-shaped support plate with a
vertically open cylindrical body whose upper end is smaller in diameter, the sound from the
medium sound speaker and the bass speaker is reflected to the floor through the cylindrical body
and the cylinder The space between the lower end of the cylinder and the floor is discharged to
the periphery, and the lower end of the cylinder is provided with a plurality of height-adjustable
legs so that the space between the cylinder and the floor can be adjusted freely. By maximizing
the gap between the cylinder and the floor from 0, all sound effects from closed to open can be
obtained.
[0031]
Also, the sound emitted from the bass speaker is nondirectional because it is reflected by the
cone thereon and emitted to the surroundings, and is suitable for use in a wide area.
Therefore, even in a particularly wide area, if two speaker devices according to the present
invention are arranged, it is possible to hear a good quality sound over a wide range.
[0032]
Brief description of the drawings
[0033]
1 is a longitudinal side view of an embodiment of the present invention.
[0034]
2 is a front view of the support plate.
[0035]
3 is a perspective view of the assembled state of the support plate.
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[0036]
Fig. 4 Partially longitudinal enlarged front view of the four legs.
[0037]
5 is an operation explanatory view of the embodiment of the present invention.
[0038]
6 is a longitudinal side view of a conventional example.
[0039]
7 is a vertical side view of the conventional example.
[0040]
8 is a longitudinal side view of a conventional example.
[0041]
9 is a longitudinal side view of a conventional example.
[0042]
Explanation of sign
[0043]
11 support plate 12 support plate 13 recess 14 recess 15 notch 16 notch 17 leg 23 middle tone
speaker 24 bass speaker 26 cone 28 high tone speaker
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