JPH0368599B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker system in which the directional characteristics of a speaker can be controlled.

[Conventional technology]

FIG. 4 is a plan cross-sectional view showing a conventional speaker system aimed at improving directional characteristics. In the figure, 11 is a closed speaker cabinet, 12
is a speaker unit.

As shown in the figure, the baffle surface A of the cabinet 11 is divided into two parts, and a speaker unit 12 is attached to each part so as to face outward, thereby forming a so-called pentagonal sealed cabinet 11. . As a result, the directional characteristics of the sound radiated from the speaker units 12 attached to each baffle are improved in the outward direction of the cabinet 11.

[Problem that the invention seeks to solve]

However, in the conventional closed cabinet structure, the opening angle of the buttful surface is constant, so the directional characteristics only have a certain effect.
There was a problem that it was difficult to freely control this.

The present invention has been made to solve the above problems, and aims to provide a speaker system whose directional characteristics can be controlled.

[Means for solving problems]

The speaker system according to the present invention divides the buttful of a sealed cabinet into two parts from the center, and connects the central part with a hinge or bellows.
Then, a packing made of soft material is attached to the outside, and by fitting this into the grooves provided on both sides of the cabinet, the center part of the buttful can move back and forth in the center part of the cabinet around the position of the packing. , This allows the opening angle of both the double-barrels to be adjusted.

[Effect]

In the speaker system according to the present invention, the directional characteristics of the speaker can be controlled by varying the opening angles of both bent surfaces.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1A to 3A, 21 is a closed type cabinet, 22 is a bisected baffle, 2
3 is a packing made of a soft material such as rubber attached to the outside of the buttful, 24 is a hinge that connects both buttfuls 22 at the center of the cabinet, and the packing 23 is inserted into a groove 25 provided on both sides of the cabinet 21. Slide left and right.

In this way, the center sides of the two divided buttfuls 22 are connected by the hinge 24, and the packing 23 is attached to the outside thereof, and the packing 23 of both buttfulls 22 has a width slightly smaller than the diameter thereof. It is fitted into grooves 25 provided on both side plates of the cabinet 21 to form a closed type speaker system.
Here, the shaft of the hinge 24 is prepared to be slightly longer, and protrudes several millimeters from the upper and lower edges of the buttful 22. On the other hand, the protruding portion of the hinge 24 is fitted into a groove 26 linearly provided in the top plate and bottom plate of the cabinet 21 along the central axis of the cabinet. By sliding on the top in a straight line, both buffles 22 can be reliably changed at the same angle. As a result, from the position where the left and right speaker units face outward as shown in Figure 1A, to the position where the left and right speaker units face outward as shown in Figure 2A,
Both baffles 22 can be moved to the position where the left and right speaker units face each other as shown in FIG. 3A, so that the directional characteristics of the speakers can be arbitrarily controlled.

Further, FIGS. 1B to 3B are plan sectional views of speaker systems according to other embodiments, and their configurations are almost the same as those in FIGS. 1A to 3A. The movement method is slightly different. That is, in FIGS. 1B to 3B, the center portions of both buffles 22 are connected by a bellows 27, and guide pins 29 are provided above and below these buffles. The bellows 27 prevents air leakage from the space created between the two divided buttles, and can be freely expanded and contracted to accommodate changes in the distance between the buttles. Further, the arcuate groove 28 in which the guide pin 29 engages and slides is connected to the closed cabinet 21.
are installed on the top and bottom plates of the The center portions of both buttfuls 22 rotate in an arc around the position of the packing 23. In addition, Figure 1~
The movable positions of the buttful in figures A and B of FIG. 3 correspond to each other. Furthermore, since the configuration shown in FIG. 3C allows the left and right buffs 22 to rotate independently, it is also possible to direct the left and right speaker units in the same direction, depending on the size of the bellows 27. . As a result, the directional characteristics of the speaker can be set on an axis other than the central axis of the cabinet while the position of the cabinet remains fixed.

In the above embodiment, the baffle of the closed cabinet is divided into left and right halves, but it may be divided into upper and lower halves, thereby controlling the directional characteristics of the speaker in the vertical direction. Further, although the speaker unit has been described as having one unit on each side, the same effect can be obtained by installing two or more speakers on one side or a multi-way speaker.

〔Effect of the invention〕

As described above, according to the present invention, the widening of the directional characteristics is controlled by dividing the buttful of the closed cabinet into two parts, connecting the two buttfuls, and allowing the central part to move back and forth (including rotation). can do. Further, additional parts include hinges, bellows, packing, etc., and this configuration can be manufactured at low cost.

[Brief explanation of drawings]

Figure 1 A, B, Figure 2 A, B and Figure 3 A,
B and C are plan sectional views showing the configuration of a speaker system according to an embodiment of the present invention, respectively, and FIG. 4 is a plan sectional view showing a conventional speaker system. In the figure, 11 and 21 are closed cabinets, 12
2 is a speaker unit, 22 is a buffle, 23 is a packing, 24 is a hinge, 25 is a groove, 26 is a linear groove, 27 is a bellows, 28 is an arcuate groove, and 29 is a guide pin. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. The buttful surface of a closed type cabinet is divided into two parts, and the two buttholes are connected at the center, and the packing is provided on the outside thereof, and the packing is engaged with grooves provided on both side plates of the cabinet, and the packing is slidable. The speaker system is characterized in that the central part of the buttful is movable back and forth on the central axis of the cabinet using the packing position as a fulcrum. 2. The speaker system according to claim 1, characterized in that the buttful surface of the closed cabinet is divided into two parts, and the center portion of both buffles can rotate back and forth using the outer edge of the cabinet as a fulcrum. .