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JPS58170195

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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
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DESCRIPTION JPS58170195
[0001]
The present invention relates to a multi-way speaker system, and in particular, easily changes the
position of a speaker with high directivity in the middle and high frequencies, and switches the
bass reflex type and the closed type along with the change of the speaker position. It is intended
to obtain characteristics meeting conditions. In the conventional multi-way speaker system, the
woofer, the squawker and the tweeter are simply arranged in a line and fixedly mounted on the
front baffle plate of the speaker box. For this reason, when the speaker box is installed at the
horizontal position depending on the space of the room, the installation position of the speaker
box, etc., there is a problem that the reproduction characteristics are impaired due to the
directivity of the squawker or tweeter. Also known is a so-called bass reflex type speaker system
in which a bass reflex port is provided on a baffle plate to enhance the low frequency, but
depending on the installation location of the speaker box, it may be desirable to use as a closed
loudspeaker system. However, there was also a problem that it was not easy to use it like that.
The present invention provides a speaker system that solves such conventional problems. An
embodiment of the present invention will be described below with reference to the drawings. FIG.
1 is a front view of a speaker system according to an embodiment of the present invention, and
FIG. 1 (,) shows a case where it can be used as a closed speaker system, and FIG. 1 (b) shows a
case where it can be used as a bass reflex speaker system. Each is shown. 1 is a speaker cabinet,
2 is a sub baffle plate rotatably provided on the front of the speaker cabinet 1, and 3 and 4 are
tweeters and squawkers fixed to the sub baffle plate. Reference numeral 5 is a U-no fixed to the
front of the speaker cabinet 1, and 6 is a bass reflex port opened to the front of the speaker
cabinet 1. In FIG. 1 (,), the sub baffle plate 2 is rotated so that the setting mark 7 on the sub
baffle plate 2 faces the mark 8 provided on the front surface of the speaker cabinet 1, and this
sub baffle plate 2 will be described later. The bass reflex port 61 is closed in conjunction with the
rotation of the shutter, and can operate as a closed system. Further, in FIG. 1 (b), the sub baffle
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plate 2 is rotated so that the mark 7 faces the other marks 9 provided on the front surface of the
speaker cabinet 1, and at this time, interlocked with the rotation of the sub baffle plate 2. The
bass reflex port 6 is opened, and it can operate as a bass reflex type system. Next, the
configuration for opening and closing the basin 6 in conjunction with the rotation of the sub
baffle plate 2 will be described in detail with reference to FIG.
FIG. 2 is a block diagram of the main part seen from the inside of the speaker cabinet. Reference
numeral 10 denotes a drive pin provided on the sub baffle plate 2, and reference numeral 11
denotes an open / close plate of a bass reflex port having a U-shaped holding portion 12 at one
end. The holding portion 12 is engaged with the drive pin 1 ░, and can slide only in a direction
perpendicular to the movement direction (arrow B described later) of the opening and closing
plate 11. The holding portion 12 may have not only the U shape shown in the drawing but also a
shape 12 'such as an oval shape. Further, at the other end of the opening and closing plate 11, a
through hole 13 of approximately the same size as the bass reflex port 6 is provided. Now, in FIG.
2A, the bass reflex port 6 is closed by the opening and closing plate 11. This is a closed operating
condition. From this, when the sub baffle plate 2 is rotated clockwise in the drawing, the drive
pin 10 draws a locus as shown by the arrow A. As specifically shown in FIG. 3 next, since the
opening / closing plate 11 is restricted slidably only in the direction of arrow B (or the opposite
direction) in the figure, the rotation of the drive pin 1o in the direction of arrow A As a result, the
open / close plate 11 locked by the holding portion 12 moves in the direction of the arrow B, and
the through hole 13 coincides with the position of the bass reflex port 6 as shown in FIG. 2). That
is, FIG. 2 0)) is a bass reflex type operation state corresponding to FIG. 1 0)). The disassembled
perspective view of the principal part of a present Example is shown in FIG. A restricting member
14 restricts the sliding direction of the open / close plate 11 as described above by the lips 14a
and 14b provided at both ends. Although not shown, the restricting member 14 extends
downward in the speaker and is screwed to the inner surface of the speaker cavity. Reference
numeral 14 c denotes a cylindrical portion for forming a predetermined bass reflex boat length
together with the bass reflex port 6 at the bass reflex opened by the through hole 13. The
reference numeral 16 denotes a clamp having a cross-section in the form of a tap having a tap
hole in the center, and 16 denotes a decorative screw passing through a screw hole 17 provided
in the sub baffle plate 2. A through hole 1 B having a diameter smaller than the diameter of the
sub baffle plate 2 is provided on the front of the speaker cabinet 1, and a counterbore 19 is
formed from the front of the speaker cabinet with a diameter equal to the diameter of the sub
baffle 2. ??????????? Insert the sub-baffle plate 2 with the squawker 4 into the
dustbore 19 from the front of the speaker cabinet 1, pass the decorative screw 16 through the
screw hole 17 of the sub-baffle plate 2 and screw it into the tap hole of the clamp 16 Then, the
sub baffle plate 2 is attached in such a manner as to pinch the edge of the through hole 18 of the
speaker cabinet 1 by the sub baffle plate 2 and the clamp 16 by tightening the decorative screw
16.
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According to the above configuration, the sub baffle plate 2 can be rotated relative to the speaker
cabinet 1 by loosening the decorative screw 16. As described above, the rotation angle is selected
in consideration of the marks 8 and 9, ie, The sub baffle plate 2 can be fixed by shrinking the
decorative screw 16 again at a position where either the closed type or the bass reflex type
operation state can be obtained by sliding the opening / closing plate 11. In the above
embodiment, the sub-baffle plate 2 can be of the closed type or bass reflex type by rotating about
90 ░ as shown, but the above-mentioned rotation angle can be freely selected as required. It can
be configured. FIG. 4 shows that the sub-baffle plate 2 can be rotated 360 ░ so that the closed
type and the bass reflex type can be formed at any of the angles. This arrangement has the
advantage that the desired position can be obtained by rotating the user or the sub baffle plate 2
in either direction. For example, if it is made to be a bass reflex type at 00 (shown) and a closed
type at 180 ░ clockwise, it is the same as the above embodiment. The end on the left side of the
through hole 13 is formed longer than the one shown in the figure-the opening and closing plate
11 closes the bass reflex port 6 at 0 ░ and 1800, and the through hole 13 is formed by
clockwise eOo and 2700 If it matches with the bass reflex port 6, even if it is the same bass reflex
type, even if the positions of 9o0 and 270 ░ are different, the positions of the tweeter 3 and the
squawker 4 with respect to the woofer 6 are different. It is possible to use in position, and it is
possible to lay out the speaker freely according to the radiation space and from the characteristic
requirement. Furthermore, it is possible to obtain better listening conditions in limited space
conditions. FIG. 6 shows still another embodiment, which has an open / close plate formed with a
large number of through holes. A through hole 13 is provided at the end of the opening and
closing plate 2o, and an oval second through hole 21 is provided next. Furthermore, the position
of the drive pin 10 is provided radially away from the center of the sub baffle plate 2, and the
sliding amount of the opening / closing plate 2o is made sufficiently large with respect to the
rotation angle of the sub baffle plate 2 of the same. . According to this configuration, the position
where the opening / closing plate 20 closes the bass reflex boat 6 according to the rotation angle
of the sub baffle plate 2, the position where the through hole 21 matches the bass reflex port 6
(shown), and the through hole 13 Can take the same position as the bass reflex boat 6. The
above-mentioned positions are in the order of sealed type and danbasto reflex type. Each
corresponds to the bass reflex type operation state.
That is, according to the above configuration, three operation states can be automatically
selected and varied by the rotation of the sub baffle plate 2, and an operation condition with
good characteristics can be realized. As described in the above embodiment, the amount of
sliding of the opening / closing plate 11.20 with respect to the rotation angle of the sub baffle
plate 2 can be varied by changing the position of the drive pin 1o. Therefore, the movement of
the opening and closing plate 11 is not impeded by the position of the tweeter 3 and the like
provided on the sub baffle plate 2 and the positional relationship of the opening and closing
plate 11 etc. If you choose, it is quite flexible. Further, dimensional errors of movable members
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such as the opening / closing plate 11 and errors of the movement amount can be absorbed by
the positioning of the drive pin 1 ░, so that the manufacture becomes easy and the cost becomes
low. According to the configuration of the above embodiment, by rotating the sub baffle plate 2,
either the closed type or the bass reflex type operation state can be easily switched and realized.
That is, when used generally in a large room, the sub baffle plate 2 is rotated as shown in FIG. ?
????? The woofer 6 may be arranged in a line. At this time, as described above, the opening
and closing plate 11 is moved according to the rotation of the sub baffle plate 20 as shown in
FIG. 2 ?), and the bass reflex port 6 is opened to provide a bass reflex type speaker system. In a
large room, the speakers are usually placed vertically as shown in FIG. 1 (b), and in a
characteristic including directivity, one speaker unit is better. Furthermore, it is possible to create
a rich sound field in the low range by driving slowly. On the other hand, when this speaker
system is used in a narrow space or a place where the installation location is limited, it is often
used sideways. At this time, the sub baffle plate 2 is rotated about 900 and as shown in FIG. 1 (a),
the uno 6 and the tweeter 3. It is more natural for the directivity characteristics to be improved if
the Suka 4 is arranged as close as possible to the woofer as close as possible. At this time, the
open / close plate 11 closes the bass reflex boat 6 according to the rotation of the sub baffle
plate 2 as shown in FIG. This is often used in a narrow room, for example in a car, and it is
preferable to use a closed type so as not to increase the low range more than necessary when the
space is narrow. It is. In addition, it is often placed horizontally when placed on a bookshelf etc.
In this case too, it is preferable that the high-range speaker unit be closer to the woofer because
it is often relatively high from the floor in terms of directivity. .
Also, even when it is not necessary to increase the bass particularly, as shown in FIG. 1 (,), the
sub baffle plate 2 may be rotated and used as a closed type. As in the embodiment shown in FIG.
4, the sub baffle plate 2 is a closed type, a bass reflex type, and a closed type by one rotation. If
you use the bass reflex type, the two bass reflex types have opposite positions of the tweeter and
the squawker, so if you want to use one with the bass reflex type at the time of using it vertically,
и и и и If you want to use it, the other will be used horizontally Sometimes when you want to use as
bass reflex type, you can use properly. It is possible to configure a speaker system that is suitable
for wider space conditions and the like. As is apparent from the above embodiments, according
to the present invention, the sub baffle plate provided with a plurality of middle and high
frequency speakers is rotatably attached to the front plate of the speaker box, while opening and
closing the passage 7 port. A plate is provided slidably, and one end of the opening and closing
plate is engaged with a drive pin provided at an eccentric position of the sub baffle plate, thereby
sliding the opening and closing plate according to the rotation angle of the sub baffle plate
Because the bass reflex port is opened and closed and switched to the bass reflex type or the
closed type, the arrangement of the mid-high range speaker with strong directivity is easily made
by the rotation of the sub baffle plate according to the installation condition of the speaker box
At the same time, it is possible to automatically switch between the bass reflex type and the
closed type according to the rotation at that time, and always achieve the best characteristics
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according to the installation conditions. Those that can provide an excellent speaker system.
[0002]
Brief description of the drawings
[0003]
Fig. 1 shows a speaker system according to an embodiment of the present invention. Fig. 1 (&)
shows a closed type, Fig. 2 shows a front view of a bass reflex type, Fig. 2 (,),, (b) shows
operation. FIG. 3 is an exploded perspective view of the main part, and FIG. 4 is a main part rear
view showing another embodiment.
1 иииииииии Speaker cabinet, 2 и и и River и sub baffle plate и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и Bass reflex port, 1 o и и и и и и и Drive bin, 11 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
regulating member. Name of Agent Attorney Nakao Toshio Other 1 person Figure 1 Figure 2
Figure 3 2
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