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JP2003018692

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DESCRIPTION JP2003018692
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system including at least a pair of stereo speakers and a center speaker, and more
particularly to a speaker device for changing the output sound of the center speaker to on / off
or the like.
[0002]
2. Description of the Related Art There are two types of speaker systems: an L channel speaker
and an R channel speaker, which are main stereo speakers, and a center speaker for improving
the localization of vocals and serifs. In this type of speaker system, when the distance of the main
stereo speaker (channel speaker of L or R) to the center speaker is narrow, the center channel
signal from the center speaker is the L channel signal and R channel signal from the main stereo
speaker Mix with.
[0003]
That is, when the main stereo speaker abuts on or approaches the center speaker, the localization
of the sound image becomes unclear. Therefore, in the conventional speaker system, switching
means (for example, a switch, a mode change program, etc.) for turning on / off the output sound
of the center speaker is provided.
09-05-2019
1
[0004]
By the way, in the above-mentioned prior art, the user switches on / off of the center speaker by
the switching means. That is, in the prior art, since it is necessary for the user to operate the
switching means before and after bringing the main stereo speaker into contact with or close to
the center speaker, there is a disadvantage that the operation requires time and effort.
[0005]
Therefore, in consideration of the above-mentioned circumstances, the present invention
provides a speaker apparatus which quickly and easily changes the output of the center speaker.
[0006]
A speaker device according to the present invention is a speaker device provided with at least a
pair of stereo speakers and a center speaker, and at least one of the stereo speakers and the
center speaker are in contact with each other. In some cases, converting means is provided to
stop or reduce the output of the center speaker.
[0007]
When the stereo speaker is separated from the center speaker, the conversion means enables the
output of the center speaker, and the sound is output from the center speaker.
On the other hand, when at least one stereo speaker abuts on the center speaker, the conversion
means stops or reduces the output of the center speaker.
[0008]
According to the present invention, since the output of the center speaker is stopped or reduced
only by bringing the stereo speaker and the center speaker into contact with each other, it is
possible to save the user the trouble of operating the switching means as in the prior art. , The
output change of the center speaker becomes quick and easy.
09-05-2019
2
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION A speaker device according to an
embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG.
The speaker device of the present embodiment is of a type provided with a pair of main stereo
speakers and a center speaker.
FIG. 1 is an overall perspective view showing the main part of the speaker device of the present
embodiment, and FIG. 2 is a circuit diagram of the main part of each speaker shown in FIG.
[0010]
As shown in FIG. 1, the speaker device 10 is provided with an L channel speaker 12 and an R
channel speaker 16 which are main stereo speakers, and a center speaker 20 for improving the
localization of vocals and serifs. As shown in FIG. 2, in the speakers 12, 16 and 20, speaker units
13, 17 and 21 are disposed in cabinets (equivalent to enclosures) 14, 18 and 22.
[0011]
As shown in FIG. 3, an input terminal 23 is disposed in the center speaker 20, and a changeover
switch 24 constituting a part of conversion means is connected between the input terminal 23
and the speaker unit 21. ing. As shown in FIG. 4, the changeover switch 24 is disposed in the
cabinet 22 and includes a leaf spring-shaped movable piece 25 and a fixed piece 26. The
movable piece 25 and the fixed piece 26 have their bases 25A and 26A fixed to the supports 28A
and 28B.
[0012]
Further, a projection 26B having an arc-shaped cross section is formed at the tip of the fixing
piece 26. Then, the distal end 25B of the movable piece 25 abuts on the projection 26B of the
fixed piece 26, whereby the movable piece 25 and the fixed piece 26 are connected. On the other
09-05-2019
3
hand, a rectangular insertion hole 22B is formed in the right side wall 22A of the cabinet 22 so
as to correspond to the approximate middle of the movable piece 25.
[0013]
A speaker cord 34 is connected to the movable portions 25 and the bases 25A and 26A of the
fixed piece 26. Further, as shown in FIG. 1, in the right side wall 22 </ b> A of the cabinet 22,
insertion holes 22 </ b> B are formed at four places in the vicinity of the corner. And the
changeover switch 24 shown in FIG. 1 is each arrange | positioned corresponding to the other
penetration hole 22B (in FIG. 4, only one place is shown in figure).
[0014]
On the other hand, in the cabinet 18 of the R channel speaker 16, a substantially arrowhead
shaped pressing portion 19 constituting a part of the conversion means is disposed at a portion
corresponding to the insertion hole 22B of the left side wall 18A. As shown in FIG. 7, when the
left side wall 18A of the cabinet 18 is brought into contact with the right side wall 22A of the
cabinet 22, the length of the pressing portion 19 in the longitudinal direction (left and right
direction) is the movable piece 25. It is set so that it can press in the direction made to estrange
the tip part 25B of the fixed piece 26 from the protrusion 26B.
[0015]
That is, when the left side wall 18A of the cabinet 18 is brought into contact with the right side
wall 22A of the cabinet 22, the connection between the movable piece 25 and the fixed piece 26
is released. The pressing portion 19 has a substantially arrowhead shape, and thus functions as a
stopper for the right side wall 22A of the cabinet 22.
[0016]
The center speaker 20 and the R channel speaker 16 can be separated by applying a
predetermined load or more. Further, as shown in FIG. 5, the sizes of the side walls of the
cabinets 14, 18 and 22 are the same.
09-05-2019
4
[0017]
Further, as shown in FIG. 3, an amplifier 32 is connected between a sound source unit 30 which
is a reproduction processing unit such as a disk drive, and an input terminal 23, for example. In
the L channel speaker 12 and the R channel speaker 16, amplifiers (not shown) are respectively
connected to a sound source unit (not shown).
[0018]
Subsequently, the operation of the loudspeaker system 10 will be described. First, as shown in
FIGS. 1 and 4, when the L channel speaker 12 or the R channel speaker 16 is separated from the
center speaker 20, the pressing portion 19 is inserted into the insertion hole 22 B of the center
speaker 20. Since the movable piece 25 is not in contact with the fixed piece 26.
[0019]
That is, as the movable piece 25 and the fixed piece 26 are connected (a voice output mode) as
shown in FIG. 2, the distal end 25B of the movable piece 25 is in contact with the projection 26B
of the fixed piece 26. The audio signal of the center speaker 20 is supplied to the speaker unit 21
and output to the outside.
[0020]
On the other hand, as shown in FIG. 7, when the R channel speaker 16 is in contact with the
center speaker 20 (see FIG. 5), the pressing portion 19 is inserted into the insertion hole 22B of
the center speaker 20. As the movable piece 25 is pressed, the movable piece 25 is separated
from the fixed piece 26.
[0021]
That is, since the distal end 25B of the movable piece 25 is separated from the projection 26B of
the fixed piece 26 so that the mode (audio stop mode) in which the movable piece 25 and the
fixed piece 26 are not connected is established. And, as shown in FIG. 6, the audio signal of the
center speaker 20 is not supplied to the speaker unit 21 and is not output to the outside.
09-05-2019
5
In the state shown in FIGS. 1 and 4, the L channel speaker 12 is in contact with the center
speaker 20.
[0022]
In this embodiment, since the switch 24 for stopping the output of the center speaker 20 and the
pressing portion 19 are provided when the R channel speaker 16 is brought into contact with the
center speaker 20, the R channel speaker 16 is used. The changeover switch 24 is switched off
only by bringing it into contact with the center speaker 20.
[0023]
That is, according to the present embodiment, the output of the center speaker 20 is stopped
only by bringing the R channel speaker 16 into contact with the center speaker 20, so that the
user does not have to operate the switching means as in the prior art. This can be omitted, and
the switching relating to the output of the center speaker 20 is quick and easy.
[0024]
Further, in the present embodiment, as shown in FIG. 5, the entire side walls 18A and 22A of the
cabinets 18 and 22 are brought into contact with each other. It may be inserted into the
Also in this case, as described above, since the changeover switch 24 is turned off, the audio
output from the center speaker 20 is stopped.
[0025]
Although the conversion means is provided only on the side of the R channel speaker 16 in the
above embodiment, the conversion means may be provided on both the L channel speaker 12
and the R channel speaker 16 in the present invention. The conversion means may be provided
only on the L channel speaker 12 side.
Moreover, although the example which provided the changeover switch 24 in multiple places
09-05-2019
6
(four places) was said in the said embodiment, a changeover switch may be single.
[0026]
Another embodiment is shown in FIG.
The conversion means of this embodiment reduces the output of the center speaker 20. In the
present embodiment, the same parts as those of the embodiment shown in FIG.
[0027]
An amplifier 40 connected between the input terminal 23 and the speaker unit 21 is disposed in
the cabinet 22. Further, a contact sensor 42 as a conversion means is connected to the amplifier
40. The contact sensor 42 is formed of a piezoelectric sheet or the like, and is disposed on the
right side wall 22A (see FIG. 1) of the cabinet 22.
[0028]
When the left side wall 18A of the R channel speaker 16 abuts on the right side wall 22A, the
contact sensor 42 is pressed by the left side wall 18A and outputs an on signal (detection signal)
to the amplifier 40. In addition, the amplifier 40 is set to reduce the output level of the audio
signal by receiving the on signal of the contact sensor 42.
[0029]
In the present embodiment, when the center speaker 20 is brought into contact with the left side
wall 18A of the R channel speaker 16, the detection signal of the contact sensor 42 is inputted to
the amplifier 40. Therefore, since the mode (audio output reduction mode) in which the
amplification value of the amplifier 40 is changed (reduced) is obtained, the output level of the
audio signal from the center speaker 20 is reduced. That is, according to the present
embodiment, it is possible to quickly and easily change the output of the center speaker 20. The
other configurations and effects are the same as those of the embodiment shown in FIG.
09-05-2019
7
[0030]
In each of the above embodiments, the stereo speakers are the L channel speaker 12 and the R
channel speaker 16, but in the present invention, a stereo including a front effect speaker, a rear
effect speaker, a rear center speaker, etc. It may be a system. Moreover, the conversion means of
this invention can be changed arbitrarily. Furthermore, the speaker device of the present
invention can be similarly applied to a television, a speaker system of a personal computer, and
the like.
[0031]
As described above, according to the present invention, since the output of the center speaker is
stopped or reduced only by bringing the stereo speaker and the center speaker into contact with
each other, the user can switch as in the prior art. It is possible to save time and effort of
operating the means, and to change the output of the center speaker quickly and easily.
[0032]
Brief description of the drawings
[0033]
1 is an overall perspective view showing the main part of the speaker device of the embodiment
according to the present invention.
[0034]
2 is a circuit diagram of the main part of each speaker shown in FIG.
[0035]
3 is a circuit diagram related to the center speaker shown in FIG.
[0036]
4 is an end view of the changeover switch shown in FIG.
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[0037]
5 is a perspective view of a state in which the speakers shown in FIG. 1 are in contact with each
other.
[0038]
6 is a circuit diagram of the main part of each speaker shown in FIG.
[0039]
7 is an end view of a state in which the movable piece of the changeover switch shown in FIG. 4
is pressed by the pressing portion.
[0040]
8 is a circuit diagram related to a center speaker according to another embodiment.
[0041]
Explanation of sign
[0042]
DESCRIPTION OF SYMBOLS 10 Speaker apparatus 12 L channel speaker (stereo speaker) 16 R
channel speaker (stereo speaker) 19 Press part (conversion means) 20 Center speaker 24
Change-over switch (conversion means) 40 Contact sensor (conversion means)
09-05-2019
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