JP3015235B2 - Speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker device for a bass part in a multi-way system in which a frequency band is divided into several bands and reproduced using different loudspeakers.

[0002]

2. Description of the Related Art Conventionally, there is an audio device such as a multi-way system which divides a frequency band into several bands and reproduces the divided bands using different speaker devices. FIG. 2 shows a general speaker device used for such an audio device.

In FIG. 2, the speaker device comprises a magnetic circuit portion 1 and a vibrating portion 2. The magnetic circuit portion 1 includes a circular flat plate portion 3a and a columnar shape provided at the center of the flat plate portion 3a. And a ring-shaped magnet 4 fixed concentrically with the center pole 3b on the center pole 3b side of the flat plate portion 3a.
And an annular upper plate 6 provided on the upper end surface of the magnet 4 concentrically with the magnet 4. The gap formed between the magnet 4 and the upper plate 4 and the center pole 3b is used as a magnetic gap so that a magnetic flux from the magnet 4 is guided to a voice coil 5 described later.

The vibrating section 2 has a conical (cone) -shaped vibrating plate 9. A voice coil 5 as a vibration source is provided in a central hole portion corresponding to the top of the cone of the vibrating plate 9.
The voice coil bobbin 5a is fixed by bonding or the like. The voice coil 5 and the diaphragm 9 include:
A flexible annular damper 11 is fixed by bonding or the like, and an outer peripheral portion of the damper 11 is elastically supported by a conical frame 7 fixed to the upper end surface of the upper plate 6 by bonding or the like. . On the other hand, an edge 8 is adhered to the outer periphery of the cone bottom of the diaphragm 9, and the edge 8 is fixed to an edge support portion 7 a of the frame 7 by adhesion or the like. That is, the frame 7 supports the diaphragm 9 by the edge 8 and the damper 11. Also, the diaphragm 9
A dust cap 10 for dust protection is provided on the voice coil 5 side.

[0005] When the speaker device configured as described above is used as a speaker device for reproducing a bass portion of a multi-way system, the diameter of the speaker device is increased in order to reproduce bass sound efficiently.

[0006]

However, when the diameter of the speaker device is increased as described above, the efficiency becomes poor at high frequencies and the directivity becomes strong, so that a high frequency as an acoustic signal is applied to such a speaker device. There is a problem that sound is not emitted accurately when the voltage is applied. Therefore, when reproducing a low-pitched portion of an acoustic signal using such a large-diameter speaker device, there is a problem that it is necessary to cut a high frequency of the acoustic signal by a signal processing circuit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a speaker device capable of efficiently reproducing a bass portion of a music signal without cutting a high frequency of the music signal.

[0008]

The present invention comprises a magnetic circuit,
In the speaker apparatus comprising a vibrating section having a Rubo chair coil bobbin conical diaphragm and vibrated in the vibration plate, the voice coil bobbin, on its side wall, the outer periphery
Of a flexible annular damper whose rim is connected to the frame
While connecting the inner periphery, the diaphragm is
And the bottom and the damper and the outer peripheral edge contact the frame.
This connects the inner peripheral edges of the continued edges .

[0009]

[0010]

Therefore, according to the present invention, the outer peripheral edge is
Bore the inner periphery of the flexible annular damper connected to the
Connected to the side wall of the chair bobbin and on the damper
Connect the top of the diaphragm cone while the outer edge
Connect the inner peripheral edge of the edge connected to the bottom of the diaphragm cone.
To transfer from the voice coil bobbin to the diaphragm.
The vibration obtained is absorbed by the damper, and the high frequency of the acoustic signal
Playback of low frequency and efficient playback of low frequency
The voice coil bobbin and diaphragm
Allows accurate centering for
You.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing the structure of a speaker device according to one embodiment of the present invention. Note that in FIG. 1, portions common to FIG. 2 are denoted by common reference numerals.

In FIG. 1, the vibrating part 2 has a conical (cone) vibrating plate 9, and a flexible annular damper 11 is provided in a center hole portion corresponding to the top of the cone of the vibrating plate 9. The voice coil bobbin 5a of the voice coil 5 as a vibration source is fixed to the damper 11 by bonding or the like. The outer peripheral portion of the damper 11 is elastically supported by a conical frame 7 fixed to the upper end surface of the upper plate 6 by bonding or the like. On the other hand, an edge 8 is adhered to the outer periphery of the cone bottom of the diaphragm 9, and the edge 8 is fixed to an edge support portion 7 a of the frame 7 by adhesion or the like. That is, the frame 7 supports the diaphragm 9 by the edge 8 and the damper 11. A dust cap 10 for dust prevention is provided on the voice coil 5 side of the diaphragm 9.

In the speaker device configured as described above, when an acoustic signal is applied, the voice coil bobbin 5a vibrates, and the vibration is transmitted to the diaphragm 9 via the damper 11. On the other hand, at a low frequency of the acoustic signal, the interval period of the vibration from the voice coil bobbin 5a is long, and at a high frequency, the interval period of the vibration from the voice coil bobbin 5a is short. Therefore, the high frequency of the acoustic signal is not reproduced due to the absorption of the vibration of the damper 11, and only the low frequency is reproduced.

[0015]

As described above , according to the present invention , the outer peripheral edge
Of the flexible annular damper connected to the frame
Connect the periphery to the side wall of the voice coil bobbin, and
While connecting the top of the cone of the diaphragm on the damper,
The inner peripheral edge of the edge connected to the frame is the cone of the diaphragm
By connecting to the bottom, vibration from the voice coil bobbin
The vibration transmitted to the moving plate is absorbed by the damper and the
Low frequency reproduction and efficient reproduction of low frequency
The voice coil bobbin and diaphragm
Enable accurate centering for frames
And the signal processing circuit
Frequency, or increase the number of parts.
Can be realized .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a structure of a speaker device according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a structure of a general speaker device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic circuit part 2 Vibration part 3 Support plate 4 Magnet 5 Voice coil 5a Voice coil bobbin 6 Upper plate 7 Frame 8 Edge 9 Diaphragm 10 Dust cap 11 Damper

Claims (1)

(57) [Claims] And 1. A magnetic circuit in the speaker device comprising a vibrating portion having a Rubo chair coil bobbin to vibrate the cone-shaped diaphragm and the diaphragm, the voice coil bobbin is provided at its side wall, the outer peripheral edge Fret
The inner periphery of a flexible annular damper connected to the
The diaphragm , while connected, has the top and bottom of the cone at the top and bottom of the cone.
Inner edge of the edge where the outer edge and outer edge are connected to the frame
Are connected, respectively .