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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker, and more particularly to a speaker provided with a variable mechanism for changing the
direction of output sound and transferring the sound appropriately in the required direction.
2. Description of the Related Art In a conventional speaker, as shown in FIG. 6, a sound output
from a speaker a is emitted directly from a conical horn b to the outside.
However, since the directivity of sound is limited in the above-mentioned prior art loudspeakers,
a plurality of interiors of a large automobile such as shown in FIG. When the pieces (sp1 to sp4)
are arranged, the sound of the speakers sp1 in the front row does not directly reach the guide G
standing outside the directivity range of the speakers sp1.
Therefore, the guide G hears the sound reflected by the glass, the cave, etc., and there is a case
where the confirmation of the sound, that is, the communication becomes sparse. Further, FIG. 8
shows a four-speaker installation state in a conventional passenger car, and also in this case,
there is a problem similar to or similar to the problem described above.
According to the present invention, by providing a variable mechanism for changing the pointing
direction of sound in the speaker body, the speaker can change the sound emitted from the
speaker to any direction and eliminate the place where the sound can not be heard. Intended to
be provided.
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention
relates to a speaker body, a speaker mount table disposed on the front of the speaker body, and
the speaker mount table. A variable mechanism having a louver unit rotatably mounted and a
louver pivotally supported by the louver unit.
The sound emitted from the speaker main body is reflected by the louver unit rotating with
respect to the speaker main body and the louver tilting with respect to the louver unit, and the
directivity direction is changed to an arbitrary direction. .
invention will now be described with reference to the attached drawings.
FIG. 1 is an exploded perspective view showing a speaker of the present invention.
FIG. 2 is a cross-sectional view showing the attached state of the main part.
The speaker according to the present invention comprises a speaker body 1, a speaker mount 2
attached to the front of the speaker body 1, and a variable mechanism 3.
The speaker body 1 has a flange 11 formed around the circular opening, and the fixing hole 12
of the speaker mount 2 is formed in the flange 11.
The speaker mount base 2 has an annular band 21 and mounting pieces 22 projecting outward
at intervals of 90 degrees on the outer periphery of the annular band 21. The annular band 21 is
used to fix the speaker main body 1 The mounting hole 22 of the variable mechanism 3 is
formed in the mounting piece 22 of the hole 23.
The variable mechanism 3 comprises an annularly formed louver unit 30 and a louver 35
pivotably supported by the louver unit 30.
The louver unit 30 has the speaker mount 22 and the mounting long hole 32 formed in the
annular portion 31, and two pairs of support pieces 33 bent upward are provided around the
A bolt tightening axial hole 34 is formed in the support piece 33 in the same manner as that
shown in FIG. 4, and the rotational shaft 36 of the louver 35 is pivotally supported by the axial
hole 34.
Two sets of louvers 35 are provided, and are pivotally supported by each of a pair of support
pieces 33 formed in the louver unit 30.
Each louver 35 connects the two flat plates 37, 37 'at an angle adjustable with a hinge 38, and
forms a rotation shaft 36 at the end of the flat plate 37.
The rotary shaft 36 is inserted into an axial hole 34 formed in the louver unit 30, and is pivotally
supported relative to the louver unit 30.
In this embodiment, the angle adjustment can be performed with the hinge 38 as well as the tilt
angle adjustment with the rotation shaft 36. However, as shown in FIGS. 3 and 4, the angle
adjustment is performed using the bent louver 35a. A screw (for tightening) may be provided on
one of the two parts by means of a bolt or the like.
The louver 35 may be formed of a flat plate 37 as shown in FIG.
In mounting the variable mechanism 3 on the speaker mount 2, as shown in FIG. 2, the annular
band 21 of the speaker mount 2 is brought into contact with the annular portion 31 of the louver
unit 30, and the mounting hole 24 is attached. Align with the long hole 32 and tighten with the
bolt 4 through the spacer 41 and the washer 42.
As a result, the variable mechanism 3 rotates with respect to the speaker mount 2 within the
range of the mounting elongated holes 32.
The angle of rotation can be adjusted by the length of the long hole.
As described above, a variable mechanism is provided in front of the speaker main body to
change the direction of the generated sound, and the generated sound can be changed and
directed in the desired direction so that the sound can reach. There is no place to clear, normal
sound, you can check the talk.
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