JPS6318234Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an enclosure for a small stereo speaker that can effectively reproduce low-frequency sound.

In recent years, compact and small speaker systems have come to be used favorably in general home audio equipment such as car stereo devices.
However, when the speaker cabinet is downsized, the acoustic energy emitted from the back of the speaker cone cannot be sufficiently reduced due to the small depth space inside the cabinet, which increases sound distortion and changes the sound quality. In particular, it becomes difficult to faithfully reproduce sounds in the bass range. This inconvenience can be alleviated to some extent by applying sound-absorbing materials or by making holes in the rear wall of the cabinet, but the sound quality is still inferior when compared to a cabinet with a large internal volume. In particular, the compact stereo systems that have been widely used recently, in which small speaker systems are pivoted at variable angles on both sides of a central control box, are often installed in small spaces. Since the enclosure has a small volume, it has been extremely difficult to faithfully reproduce bass frequencies in such stereo speaker systems.

The present invention improves the above-mentioned problems in a compact stereo speaker system in which small speakers are pivotally mounted on both sides of a central control box at variable angles, and it is possible to reproduce bass frequencies without distortion in a compact stereo speaker system. This provides an enclosure for a stereo speaker system that can be used.

The drawings showing the embodiment of the present invention will be explained below.As shown in FIG. 1, speaker cabinets 3, 3 each having a small speaker 2 installed on both sides of an intermediate cabinet 1 are pivotally connected in a variable angle. In a speaker system comprising: an inner surface 4 of each of the speaker cabinets 3;
4 are provided with arc-shaped air ducts 6, 6 having an arcuate radius centered on the pivot joints 5, 5 of the speaker cabinets 3, 3, and the free ends of the arc-shaped air ducts 6, 6 are The speaker cabinet 1 is inserted into the intermediate cabinet 1 via rubber packings 7, 7, and the arc-shaped air duct 6,
6 is connected to each other, so that the sound pressure from the speaker cone side is reduced within the intermediate cabinet 1, and amplitude distortion in the bass range is reduced.

The cross-sectional shape of the arcuate air ducts 6, 6 is not limited to the vertically elongated rectangle shown in FIG. 3, but may be circular, square, or polygonal. Furthermore, it goes without saying that the intermediate cabinet 1 may function not only as a mere spacer for the left and right speaker cabinets 3, but also as a cabinet equipped with a recording and reproducing device.

As described above, the stereo speaker enclosure according to the present invention is a stereo speaker system in which speaker cabinets 3, 3 each having a small speaker 2 installed therein are pivotally connected to each side of an intermediate cabinet 1 in a variable angle. , arcuate air ducts 6, 6 having an arcuate radius centered on the pivot joints 5, 5 of the speaker cabinets 3, 3 are provided on the inner surfaces 4, 4 of the speaker cabinets 3, 3, respectively. to connect the free ends of the arcuate air ducts 6, 6 to the intermediate cabinet 1.
Since the speaker cabinets 3, 3 can be inserted into the air duct 6, the angles of the speaker cabinets 3, 3 can be adjusted as before, and the interior of the speaker cabinets 3, 3 and the intermediate cabinet 1 are connected to the air duct 6. , the internal space of the speaker cabinet 3 is substantially expanded, and the acoustic energy within the cabinets 3, 3 in the bass range emitted from the back of the speaker cone is effectively utilized. do.

Therefore, the acoustic distortion in the bass range due to the increase in sound pressure inside the cabinet is eliminated, and a high quality bass reproduction effect can be achieved even with a small speaker cabinet, making it particularly suitable for use in a stereo system using small speakers. Although the embodiment shown in the figure corresponds to a closed closed horn type enclosure, the same effect can be obtained even in the case of a closed type enclosure, and the speaker cabinets 3, 3 play the role of acoustic capacitance. also.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and
Figure 1 is a front perspective view, Figure 2 is a partially sectional plan view,
FIG. 3 is a perspective view of the speaker cabinet. 1...Intermediate cabinet, 2...Speaker,
3...Speaker cabinet, 4...Inner surface of speaker cabinet, 5...Pivot joint, 6
...An arc-shaped air duct.

Claims (1)

[Scope of utility model registration request] Small speakers 2 on both sides of intermediate cabinet 1
In a stereo speaker system in which a speaker cabinet 3 in which a speaker cabinet 3 is installed is pivotally coupled in a variable angle, a pivot joint portion 5 of the speaker cabinet 3 is attached to an inner surface 4 of each of the speaker cabinets 3. An arcuate air duct 6 having an arcuate radius centered at An enclosure for a small stereo speaker, characterized in that the enclosure is connected to the inside thereof through the arc-shaped air duct 6.