JPH0635586Y2 - Speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a speaker device.

(Outline of the Invention) In the present invention, the center of gravity of the speaker enclosure 1 is arranged on a perpendicular line passing through the center point of the ground plane, and the arrangement enables stable operation during large amplitude operation. The present invention provides a device for doing so.

(Prior Art) As shown in FIG. 1, a conventional general speaker device includes a speaker unit 2 inside a speaker enclosure 1.
When an audio signal is input to this, sound waves are emitted from the diaphragm 6 of the speaker unit 2.

(Problems to be Solved by the Invention) According to the conventional speaker device as described above, since the speaker unit 2 is attached to the front baffle plate 4, the center of gravity of the speaker device is the second.
As shown in the figure, it is located on the perpendicular line passing through the point 3 near the baffle plate 4 from the center point of the ground contact surface. For this reason, in such a speaker device, since the enclosure 1 is not fixed to the floor, especially when there is a large input of an audio signal of about 40 to 60 Hz, the speaker enclosure 1
There is a problem in that the sound waves emitted from the speaker unit 2 are disturbed because the center of gravity becomes unstable, such as the fact that it vibrates and slightly moves on the floor. This will be explained with reference to FIG. 5. The x-axis direction is t (time elapse), the y-axis direction is amplitude, and the waveform of this graph is about 40-.
FIG. 7 is an amplitude characteristic diagram when a 60 Hz audio signal is input to a conventional speaker device. In this figure, the waveform becomes dull at the rising portion indicated by the arrow for the reason described above.
The reproducibility of the music signal will be impaired.

(Means for Solving the Problems) In order to solve the above problems, the present invention is designed so that the center of gravity of a speaker device passes through the center point of the ground plane and is positioned on a line perpendicular to the ground plane. Is a stable one.

(Operation) Therefore, even when a large audio signal of about 40 to 60 Hz is input, normal amplitude characteristics are exhibited due to the fact that the center of gravity of the speaker enclosure 1 does not move relative to the ground plane, and an important factor for music reproduction. It is possible to faithfully reproduce the rising waveform of the occupied sound without blunting it.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 6. FIG. 3 is a sectional view of a speaker device according to the present invention. In FIG. 3, the speaker unit 2 is attached to the baffle plate 4 of the speaker enclosure 1 by screws or the like (not shown). A weight 7 for adjusting the position of the center of gravity is attached to a back plate 8 opposite to the baffle plate 4 to which the speaker unit 2 is attached. The weight of the weight 7 is set after being adjusted in a balanced state such that the center of gravity passes through the center point of the ground plane 5 of the speaker enclosure 1 and is on a vertical line with respect to the ground plane 5. So about 40 ~
Large input of 60Hz audio signal is speaker unit 2
, The center of gravity of the speaker enclosure 1 is in a balanced state as described above, so that the relative position of the center of gravity does not move. FIG. 6 is an amplitude equality diagram when an audio signal of about 40-60 Hz is input to the speaker device of the present invention. In FIG. 6, the waveform of the rising portion as shown by the arrow is clearly sharper than the amplitude characteristic diagram of the conventional speaker device of FIG. 5 described above. Therefore,
Even when the loudspeaker diaphragm 6 operates with a large amplitude with a large input of the low frequency signal, a stable music signal can be reproduced without causing the speaker device to slightly move due to the vibration of the speaker enclosure 1.

(Effects) As described above, according to the speaker device of the present invention, even when the speaker diaphragm 2 operates with a large amplitude, the speaker enclosure is stable in the center of gravity and the sound that is an important factor in music reproduction is suppressed. The rising part can be faithfully reproduced. Further, it is not necessary to process the speaker unit 2 at all.

In this example, one speaker unit 2 is attached to the speaker enclosure 1, but the present invention is also applicable to the case where a plurality of speaker units 2 are attached to the speaker enclosure 1.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a conventional speaker device, FIG. 2 is a horizontal sectional view, FIG. 3 is a vertical sectional view of a speaker device according to the present invention, and FIG. 5 is a diagram showing an example of a reproduced waveform according to the conventional example, and FIG. 6 is a diagram showing an example of a reproduced waveform according to the present invention. 1 …… Speaker enclosure, 2 …… Speaker unit, 3 …… Point where the perpendicular drawn from the center of gravity of the speaker system to the ground plane intersects with the ground plane, 4 …… Front baffle plate, 5 …… For the speaker system with the floor Ground plane, 6 …… Speaker unit diaphragm, 7 …… Center of gravity position adjustment weight.

Claims (1)

[Scope of utility model registration request] 1. A speaker device in which one or more speaker units are installed in a speaker enclosure, wherein the center of gravity of the speaker device is located on a line passing through the center point of the ground plane and perpendicular to the ground plane. Speaker device.