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JPH10308993

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH10308993
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
coaxial type speaker in which a second speaker smaller in diameter than the first speaker is
disposed in front of the first speaker, and in particular, a coaxial type in which the second
speaker is variably arranged. It relates to the speaker.
[0002]
2. Description of the Related Art FIG. 5 shows a conventional coaxial speaker of variable
directivity type, in which a second speaker (tweeter) 12 is disposed in front of a first speaker
(woofer) 11. The speaker 12 is arranged so as to be able to swing about its center P as a rotation
axis, and by tilting the second speaker 12, the directivity can be changed. Reference numerals 13
and 14 denote coupling type brackets for holding the second speaker 12, and the second speaker
12 is configured to rotate within the bracket 13, and the brackets 13 and 14 correspond to the
first speaker 11. It is supported by a post extending from the center of the bridge or a bridge
extending to the opening of the first speaker 11.
[0003]
SUMMARY OF THE INVENTION In the conventional coaxial speaker, the second speaker 12 has
its center P as its axis of rotation, so when the second speaker 12 is inclined, the second speaker
12 is used. Since one end 12a of the speaker 12 protrudes outward, and the amount S of jumping
increases when variable as compared with the state directed to the front, there is a problem in
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the attachment such as being restricted in the mounting location The
[0004]
SUMMARY OF THE INVENTION The object of the present invention is to eliminate the abovementioned drawbacks in the conventional coaxial speaker, and even if the directivity of the
second speaker is changed, the edge of the second speaker does not protrude at all or does not
protrude However, it is an object of the present invention to provide a coaxial speaker having a
good mountability because the amount of protrusion can be reduced.
[0005]
According to the coaxial type speaker of the present invention, in the first aspect of the present
invention, a coaxial speaker in which a second speaker with a smaller diameter than that of the
first speaker is variably arranged. Speaker, the second speaker is pivotally supported at a
position decentered from the central axis of the second speaker, and the second speaker pivots in
the direction of the first speaker with the eccentric axis as a fulcrum It is characterized in that it
is configured as follows.
[0006]
Thus, for example, if the outer peripheral edge of the second speaker is in the pivotally supported
position, the edge of the second speaker is directed outward even if the directivity of the second
speaker is changed. There is no protrusion at all, and even in the case of pivotally supporting at a
position closer to the central axis than this, the amount of outward protrusion of the edge of the
second speaker is larger than that of the conventional one. Less.
[0007]
According to a second aspect of the present invention, in the configuration of the first aspect, a
stopper for regulating the amount of rotational movement is provided.
[0008]
As a result, the second speaker is not pivoted more than necessary.
[0009]
According to the third aspect of the present invention, in the configuration of the first and second
aspects, the wall portion is provided so as to surround the rotational movement range.
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[0010]
As a result, direct sound from the second speaker can be avoided, and the sound is reflected by
the wall portion to be a realistic sound.
[0011]
According to a fourth aspect of the present invention, in the configuration according to the first,
second and third aspects, a sliding open / close lid for closing the second speaker is provided.
[0012]
Thus, when the second speaker is a tweeter, the high frequency may be loud at the rear seat in
this case, but the high frequency can be suppressed only by sliding the opening / closing lid
without adjusting with the tone control in such a case. Can.
In addition, if completely closed by the open / close lid, the second speaker is not used and the
speaker system of only the first speaker, for example, the woofer is obtained.
[0013]
According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the
opening / closing lid is provided with a through hole of a desired shape at a location
corresponding to the second speaker at the time of closing to give a diffuser function. It features.
[0014]
This makes it possible to enjoy different sound quality.
[0015]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows an embodiment of a
coaxial speaker according to the present invention, in which 1 indicates a first speaker, and a
woofer is used.
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A second speaker 2 has a diameter smaller than that of the first speaker 1, and a speaker is used.
2a indicates a terminal plate of the second speaker 2, 3 indicates a frame of the second speaker
2, 4 indicates a front panel of the second speaker 2, and the rear portion has a tubular shape.
The second speaker 2 is variably disposed in front of the first speaker 1, and is supported by a
bridge 5 extending across the opening of the first speaker 1.
[0016]
The second speaker 2 is pivotally supported by the support shaft 6 by the support shaft 6 at a
position eccentric from the central axis O of the second speaker 2 so that directivity can be
varied.
In the illustrated example, one end side 4a of the outer peripheral portion of the front panel 4 is
pivotally supported by the support shaft 6, and the other end side 4b of the outer peripheral
portion of the front panel 4 is a speaker arrangement hole 5a provided in the bridge 5. By
engaging with the rim portion 5b of the second speaker 2, the second speaker 2 is only rotated
in the direction of the first speaker 1 without rotating in the outward direction.
On the other hand, on the back surface side of the bridge 5 is formed a stopper 7 which abuts
the rear outer peripheral edge 4c of the front panel 4 so as to restrict the second speaker 2 not
to rotate more than necessary. .
[0017]
In the above configuration example, the outer peripheral edge of the second speaker 2 is in the
pivotally supported position, but in the case where it is pivotally supported at a position closer to
the central axis O than this. Even in this case, the amount of outward protrusion of the edge of
the second speaker 2 is smaller than that of the conventional one.
[0018]
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In FIG. 3, the wall 8 is provided so as to surround the rotational movement range of the second
speaker 2, and the second speaker 2 can be rotated until it abuts on the bottom plate 8a of the
wall 8.
In this configuration, the direct sound from the second speaker 2 can be avoided, and the sound
is reflected by the wall portion 8 to be a realistic sound.
[0019]
When the second speaker 2 is a tweeter, the high region may be loud at the rear seat.
Therefore, on the surface side of the bridge 5, it is possible to provide a slide type open / close
lid 9 which can close the second speaker 2 as shown in FIG. 4 (A).
With this configuration, the high frequency can be suppressed only by sliding the open / close lid
9 to open and close without adjusting by the tone control.
In addition, if the cover is completely closed by the open / close lid 9, the second speaker 2 can
not be used, and a speaker system of only the first speaker 1, for example, a woofer can be
obtained.
[0020]
FIG. 4 (B) shows another configuration example of the open / close lid 9, and the open / close lid
9 is provided with a through hole 9a of a desired shape at a location corresponding to the second
speaker 2 at the closing time to have a diffuser function. It is a thing.
With this configuration, different sound quality can be enjoyed.
[0021]
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According to the coaxial type loudspeaker of the present invention, in the first aspect of the
present invention, for example, if the peripheral edge of the second loudspeaker is in the
pivotally supported position, Even if the directivity of the speaker is changed, the edge of the
second speaker never protrudes outward at all, and even if it is configured to be pivotally
supported at a position closer to the central axis than this. The amount of outward protrusion of
the edge of the second speaker is smaller than that of the conventional one, and the mountability
is good.
[0022]
In the second aspect of the present invention, the second speaker does not rotate more than
necessary.
[0023]
According to the third aspect of the present invention, the direct sound from the second speaker
can be avoided, and furthermore, the sound can be reflected to the wall portion to be a realistic
sound.
[0024]
According to the fourth aspect of the present invention, the high frequency can be suppressed
only by sliding the opening and closing lid without adjusting by the tone control, and if the
opening lid is completely closed, the second speaker is used Alternatively, the speaker system
may be a first speaker, for example, a woofer only.
[0025]
According to the fifth aspect of the present invention, different sound quality can be enjoyed.
[0026]
Brief description of the drawings
[0027]
1 is a cross-sectional view showing an embodiment of the coaxial speaker of the present
invention.
[0028]
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2 is a cross-sectional view showing a state in which the directivity of the second speaker is
changed.
[0029]
3 is a cross-sectional view showing another configuration example of the coaxial speaker of the
present invention.
[0030]
4 shows the opening and closing lid, (A) is a plan view, (B) is a plan view with a diffuser function.
[0031]
5 is a cross-sectional view showing a conventional variable direction coaxial speaker.
[0032]
Explanation of sign
[0033]
Reference Signs List 1 first speaker 2 second speaker 5 bridge 6 support shaft 7 stopper 8 wall
portion 9 opening / closing lid 9 a extraction hole O central axis
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