JPS6345158B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-way speaker system, in which the position of a speaker for middle and high ranges, which has strong directivity, can be easily changed, and the speaker can be switched between a bass reflex type and a closed type in conjunction with the change in the position of the speaker. This makes it possible to obtain characteristics that match the installation conditions of the speaker system.

Conventional multi-way speaker systems simply have a woofer, squawker, and tweeter fixedly attached to the front panel of a speaker box in a line. For this reason, if the speaker box is installed in a horizontal position due to the space of the room, the installation position of the speaker box, etc., there is a problem in that the reproduction characteristics are impaired due to the directivity of the squawker or tweeter.

There is also a so-called bass reflex type speaker system, which has a bass reflex port on the full board to enhance the low range, but depending on where the speaker box is installed, you may want to use it as a closed speaker system. Even though it was available, there was a problem that it was not easy to use it in that way.

The present invention provides a speaker system that solves these conventional problems. An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a front view of a speaker system according to an embodiment of the present invention. FIG. 1a shows a case where it can be used as a closed-type speaker system, and FIG. be.

Reference numeral 1 denotes a speaker cabinet, 2 a sub-buffle plate rotatably provided on the front surface of the speaker cabinet 1, and 3 and 4 a tweeter and a squawker fixed to this sub-buffle plate. Reference numeral 5 indicates a woofer fixed to the front surface of the speaker cabinet 1, and reference numeral 6 indicates a bass reflex port opened at the front surface of the speaker cabinet 1. In FIG. 1a, the sub-buffle plate 2 is rotated so that the mark 7 provided on the sub-buffle plate 2 faces the mark 8 provided on the front surface of the speaker cabinet 1. Bass reflex port 6 in conjunction with
is closed and can operate as a closed system. Further, in FIG. 1b, the mark 7 is replaced by another mark 9 provided on the front surface of the speaker cabinet 1.
At this time, the bass reflex port 6 is opened in conjunction with the rotation of the sub-buff full plate 2, making it possible to operate as a bass reflex type system.

Next, the configuration for opening and closing the bass reflex port 6 in conjunction with the rotation of the sub-buffle plate 2 will be described in detail with reference to FIG. 2. FIG. 2 is a block diagram of the main parts of the speaker cabinet as seen from the inside. Reference numeral 10 indicates a drive pin provided on the sub-baffle plate 2, and reference numeral 11 indicates an opening/closing plate of a bass reflex port having a U-shaped engagement portion 12 at one end. The engaging portion 12 is connected to the drive pin 1.
0, and is slidable only in a direction perpendicular to the moving direction of the opening/closing plate 11 (arrow B, which will be described later). Note that the engaging portion 12 may have a shape 12', such as an oval shape, instead of being limited to the U-shape shown in the drawing. Further, at the other end of the opening/closing plate 11, a through hole 13 of approximately the same size as the bass reflex port 6 is provided. In FIG. 2a, the opening/closing plate 11 connects the bass reflex port 6.
is in a closed state. This is a closed operating condition. From this, when the sub-buff full plate 2 is rotated clockwise in the figure, the drive pin 10 draws a trajectory as shown by arrow A. As specifically shown in FIG. 3 below, the opening/closing plate 11 is restricted to be slidable only in the direction of arrow B (or vice versa) in the figure.
As the drive pin 10 rotates in the direction of the arrow A, the opening/closing plate 11 locked by the engaging portion 12 moves in the direction of the arrow B, and the through hole 13 moves to the position of the bass reflex port 6 as shown in FIG. 2b. matches. That is, Fig. 2b
is the operating state of the bass reflex type corresponding to FIG. 1b.

FIG. 3 shows an exploded perspective view of the main parts of this embodiment.
Reference numeral 14 denotes a regulating member with ribs 14a, 1 provided at both ends.
4b regulates the sliding direction of the opening/closing plate 11 as described above. Although not shown, the regulating member 14 extends downward within the speaker and is screwed to the inner surface of the speaker cabinet. Note that 14c is a cylindrical portion for forming a predetermined bass reflex port length with the bass reflex port 6 when the through hole 13 is opened.

Reference numeral 15 designates a fastening fitting having an L-shaped cross section with a tap hole provided in the center, and reference numeral 16 designates a decorative screw passing through a screw hole 17 provided in the subbuffle plate 2. A through hole 18 having a diameter smaller than the diameter of the sub-baffle plate 2 is provided on the front surface of the speaker cabinet 1, and a counterbore 19 with a diameter equal to the diameter of the sub-buff full plate 2 is formed from the front surface of the speaker cabinet. .
Therefore, fit the sub-butt-full board 2 with the tweeter 3 and squawker 4 attached into the counterbore 19 from the front of the speaker cabinet 1, pass the decorative screws 16 through the screw holes 17 of the sub-tight board 2, and then insert the tightening fittings. By screwing into the tapped holes 15 and tightening the decorative screws 16, the sub-buffle plate 2 is attached in such a way that the edge of the through-hole 18 of the speaker cabinet 1 is held between the sub-buffle plate 2 and the fastening metal fittings 15. According to the above configuration, by loosening the decorative screw 16, the sub-buffle plate 2 can be rotated with respect to the speaker cabinet 1, and as described above, the rotation angle can be selected using the marks 8 and 9 as a guide. That is, by sliding the opening/closing plate 11, the decorative screws 16 can be tightened again at a position where either the closed type or the bass reflex type operating state can be obtained, and the sub-buffer plate 2 can be fixed.

In the above embodiment, it was possible to create a closed type or a bass reflex type by rotating the sub-buff full plate 2 by about 90 degrees as shown in the figure, but the rotation angle can be freely selected as required. can. FIG. 4 shows a configuration in which the sub-buff full plate 2 can be rotated through 360 degrees, and a closed type and a bass reflex type can be formed at either angle. This configuration has the advantage that a desired position can be obtained even if the user rotates the sub-buffle plate 2 in any direction. For example, 0° (as shown) is a bass reflex type, clockwise rotation.
If it becomes a closed type at 180 degrees, it is similar to the above embodiment. In addition, the left end of the through hole 13 is made longer than the one shown in the figure, so that the open/close plate 11 closes the bass reflex port 6 at 0° and 180°, and the through hole 13 closes at 90° and 270° clockwise. If you match the bass reflex port 6, the positions of the tweeter 3 and squawker 4 with respect to the woofer 5 will be different when the positions are 90° and 270° even with the same bass reflex type. This makes it possible to freely layout the speakers according to the radiation space and characteristics requirements. Furthermore, it is possible to obtain better listening conditions within limited space conditions.

FIG. 5 shows yet another embodiment, which has an opening/closing plate with a large number of through holes formed therein. The opening/closing plate 20 is provided with a through hole 13 at its most end, and then an oblong second through hole 21 . Further, the drive pin 10 is located at a position radially away from the center of the sub-buffle plate 2, so that the amount of sliding of the opening/closing plate 20 is made sufficiently large for the same rotation angle of the sub-buffle plate 2.

According to this configuration, depending on the rotation angle of the sub-buff full plate 2, the opening/closing plate 20 is in a position where it closes the bass reflex port 6, a position where the through hole 21 is aligned with the bass reflex port 6 (as shown), and a position where the through hole 13 is The position corresponding to the bass reflex port 6 can be taken. The above positions are, in order, closed type, dumped bass reflex type,
Each corresponds to the operating state of the bass reflex type. That is, according to the above configuration, it is possible to automatically select and vary among the three operating states by rotating the sub-buffer plate 2, and it is possible to realize operating conditions with good characteristics.

As described in the above embodiment, by changing the position of the drive pin 10, the amount of sliding of the opening/closing plates 11, 20 relative to the rotation angle of the sub-buffle plate 2 can be varied. Therefore, the movement of the opening/closing plate 11 is not hindered due to the positional relationship between the tweeter 3 and the like provided on the sub-buff full plate 2 and the opening/closing plate 11, and the driving pin 10 is adjusted in accordance with the required sliding amount of the opening/closing plate 11. All you have to do is choose the location, and it has a high degree of freedom. Furthermore, the dimensional errors and movement amount errors of movable members such as the opening/closing plate 11 are caused by this drive pin 10.
Since it can be absorbed by positioning, manufacturing becomes easy and costs are also reduced.

According to the configuration of the above-described embodiment, by rotating the sub-buffer plate 2, it is possible to easily switch between the closed type and the bass reflex type operating state. That is, when the apparatus is generally used in a large room, the sub-battery plate 2 may be rotated to arrange the tweeter 3, squawker 4, and woofer 5 in a line as shown in FIG. 1b. At this time, as described above, the opening/closing plate 11 moves in accordance with the rotation of the sub-battery plate 2 as shown in FIG. 2b, and the bass reflex port 6
opens, creating a bass reflex speaker system. This is because in a large room, speakers are usually placed vertically as shown in FIG. 1B, and it is better to have each speaker unit in a row in terms of characteristics including directivity. Furthermore, the bass reflex drive makes it possible to create a rich sound field in the low range.

On the other hand, when this speaker system is used in a narrow space or in a place where installation location is limited, it is often used horizontally. At this time, rotate the sub-buff full plate 2 by about 90 degrees and move the woofer 5 and
A tweeter 3 and a squawker 4 are arranged as close as possible. This is because when used horizontally, it is better to group the highly directional high-frequency speaker units as close to the woofer as possible to improve the directional characteristics.
It also sounds natural. At this time, the opening/closing plate 11 is rotated as shown in FIG.
closes the bass reflex port 6, creating a closed speaker system. This is because it is often used horizontally in a small room, such as in a car, and if the space is small, it is better to use it in a closed type so as not to enhance the low range more than necessary. It is. Also, when placed on a bookshelf, etc., it is often placed horizontally, but in this case too, it is often placed relatively high off the floor, and from the viewpoint of directivity, it is desirable for the high-frequency speaker unit to be closer to the woofer. . Furthermore, even when there is no particular need to enhance the bass, the sub-buffle plate 2 may be rotated and used as a closed type as shown in FIG. 1a.

Note that, as in the embodiment shown in FIG. 4, if one rotation of the sub-buffer plate 2 changes the closed type, bass reflex type, closed type, and bass reflex type, these two types can be changed.
Since the two bass reflex types have the tweeter and squawker in opposite positions, one can be used as a bass reflex type when used vertically, and the other can be used as a bass reflex type when used horizontally, allowing for a wider range of uses. A speaker system suitable for spatial conditions etc. can be configured.

As is clear from the above embodiments, according to the present invention, a sub-buffle board provided with a plurality of speakers for medium and high ranges is rotatably attached to the front plate of the speaker box, while an opening/closing plate for opening and closing the bass reflex port is slidably attached. The opening/closing plate is configured to be movable and one end of the opening/closing plate is locked to a drive pin provided at an eccentric position of the sub-button full plate, so that the opening/closing plate is slid according to the rotation angle of the sub-button full plate to open and close the bass reflex port. Since it is designed to switch between a bass reflex type and a closed type, it is possible to easily change the placement of the speakers for the highly directional mid-high range according to the installation conditions of the speaker box by rotating the sub-balance plate. It is possible to automatically switch between a bass reflex type and a closed type according to the rotation of the speaker, and it is possible to provide an excellent speaker system that can always achieve the best characteristics depending on the installation conditions.

[Brief explanation of the drawing]

FIG. 1 shows a speaker system according to an embodiment of the present invention; FIG. 1a is a closed type speaker system, FIG. FIG. 3 is an exploded perspective view of the main part, and FIGS. 4 and 5 are rear views of the main part showing other embodiments. 1...Speaker cabinet, 2...Sub-battery board, 3...Tweeter, 4...Squawka, 5...
... Woofer, 6 ... Bass reflex port, 10 ... Drive pin, 11 ... Opening/closing plate, 13 ... Through hole, 14 ...
Regulatory components.

Claims (1)

[Claims] 1 Multiple speakers for mid-high range are installed,
It has a sub-baffle plate rotatably attached to the front plate of the speaker box, a bass reflex port formed on the front plate of the speaker box, and an opening/closing plate that slides to freely open and close the bass reflex port of the speaker box, One end of the opening/closing plate is locked to a drive pin provided at an eccentric position of the sub-button full plate, and the opening/closing plate is slid according to the rotation of the sub-button full plate to change the arrangement of the speakers and open/close the bass reflex port; A speaker system characterized by being configured to be switchable between a bass reflex type and a closed type.