JPH0851692A - Speaker - Google Patents

Abstract

(57) [Abstract] [Purpose] Rolling due to the displacement between the center of gravity and the support point when driving the speaker can be reduced, the divided vibration mode can be reduced, and the reflection action from the edge of the diaphragm can be reduced. To provide a speaker capable of reducing distortion deformation of a voice coil. A mechanical filter 12 is provided on the voice coil bobbin 10 and the mechanical filter 12 is provided.
And the vibration plate 13 are connected to each other at one point 14 on the central axis OO.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker suitable for cabinet-less television woofers, radio-cassette subwoofers, home subwoofers, vehicle-mounted subwoofers, and the like.

[0002]

2. Description of the Related Art A general speaker system uses a woofer, a squawker, a tweeter, etc., as shown in FIG. The characteristic is corrected. On the other hand, the subwoofer of the present invention is
As shown in FIG. 4, it is for supplementing or enhancing the bass sound of a full-range speaker, and enables a wide-band speaker system without using a network circuit.

By the way, FIG. 5 shows a conventional speaker provided with a mechanical filter. The conventional speaker shown in FIG. 5 has an inverted T-shaped yoke 1 having a flange 1a and a center pole 1b, a ring-shaped magnet 2 fixed on the flange 1a, and a magnet provided on the magnet 2. Plate 3, a frame 4 having a bottom fixed to the plate 3, a diaphragm 5 connected to the outer peripheral portion of the frame 4 via an edge 5a, and two stages spaced apart in the axial direction of the frame 4. The first and second dampers 6 and 7 arranged on the inner periphery of the frame 4 and the diaphragm 5
Mechanical filter 8 provided on the inner peripheral portion of the center of the yoke 1, the center pole 1b of the yoke 1, the magnet 2 and the plate 3
A voice coil 9 disposed in a magnetic gap formed between the voice coil 9 and the first and second voice coils 9 supporting the voice coil 9
A voice coil bobbin 10 oscillatably supported by the dampers 6, 7 and the mechanical filter 8, and a diaphragm 5
And a cap 11 placed on the upper surface of the central part of the.

[0004]

However, the above-mentioned conventional speaker is attached to the baffle plate, and the voice coil bobbin 10 is provided.
Is laterally arranged, the diaphragm 5 and the voice coil bobbin 10 are deflected by the weight of the diaphragm 5, and the gap between the voice coil bobbin 10 and the center pole 1b is biased, so that the circumferential gap width is not constant. When the speaker is driven in this state, rolling occurs due to the shift between the center of gravity and the support point, and the voice coil bobbin 10 and the center pole 1b come into contact with each other in a narrow gap portion, which causes distortion and abnormal noise.

In order to solve this problem, a structure in which a damper is interposed between the cone neck and the frame has been proposed. Although the speaker of this structure is effective in eliminating contact in the gap portion, it is not possible to reduce the reaction to the voice coil due to the split vibration mode generated in the cone paper and the reflection from the edge.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce rolling caused by a deviation between a center of gravity and a support point when a speaker is driven, and yet a divided vibration. A speaker that reduces the mode and reduces the reflection effect from the edge of the diaphragm, reduces distortion deformation of the voice coil, and when used in combination with a full-range speaker, enables a broadband speaker system without using a network circuit. Is to provide.

[0007]

In order to achieve the above object, the present invention provides a mechanical filter 12 on an upper portion of a voice coil bobbin 10 and further includes the mechanical filter 1 described above.
2 and the vibration plate 13 are connected at a point 14 on the central axis OO.

Further, in order to achieve the above-mentioned object, the present invention is one in which the damper 15 and the vibrating plate 16 which are made of one plate are connected at a point 17 on the central axis OO.

[0009]

In the present invention, since the mechanical filter 12 is provided above the voice coil bobbin 10 and the mechanical filter 12 and the diaphragm 13 are connected at the one point 14 on the central axis OO, the voice coil is connected to the voice coil. In addition to minimizing the effect of the above, by installing the point of action of the weight of the diaphragm 13 and the suspension fixing point on the same line, rolling due to the shift between the center of gravity and the support point when the speaker is driven can be prevented. Can be reduced. Moreover, since the diaphragm 13 (cone paper) can be formed into a perfect conical shape, the strength is increased as compared with the diaphragm (cone paper) of the conventional speaker that requires a hole with a large voice coil diameter to be formed at the center. The divided vibration mode can be reduced, the reflection effect from the edge 13a can be reduced, and the distortion deformation of the voice coil can be reduced.

Further, according to the present invention, the voice coil bobbin 10 is provided.
Is supported by a single-plate damper 15, and the single-plate damper 15 and the vibration plate 16 are connected at a point 17 on the central axis OO. As a result, also in the present invention, by the same operation as described above, it is possible to reduce the rolling due to the shift between the center of gravity and the supporting point when the speaker is driven, and to reduce the divided vibration mode and to vibrate the diaphragm. The reflection effect from the edge 16a of 16 can be reduced, and the distortion deformation of the voice coil can be reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing a first embodiment of the present invention. In the first embodiment shown in FIG. 1, a mechanical filter 12 is provided above the voice coil bobbin 10. On the other hand, the diaphragm 1 is attached to the frame 4 via the edge 13a.
3 is attached, and this diaphragm 13 is formed in a perfect conical shape. Then, the mechanical filter 12 and the diaphragm 13 are joined at a single point 14 on the central axis OO by adhesion or the like. The other structure of the first embodiment is similar to that of the speaker described with reference to FIG.

In the loudspeaker of the first embodiment constructed as described above, the mechanical filter 12 and the diaphragm 13 are connected at the one point 14 on the central axis OO, and the point of action of weight and the fixed point of suspension are the same. Since they are installed on the line, it is possible to reduce the rolling caused by the shift between the center of gravity and the support point when the speaker is driven.

Further, as can be seen from FIG. 1, the shape of the diaphragm (cone paper) 13 can be formed in a perfect conical shape without a hole at the center, so that a hole having a large voice coil diameter is formed at the center of the diaphragm. Since the strength can be increased as compared with the conventional cone paper (see the vibration plate 5 in FIG. 4) that needs to be opened,
The split vibration mode can be reduced, and the reflection effect from the edge 13a can be reduced, so that distortion deformation of the voice coil 9 can be reduced.

Next, FIG. 2 is a vertical sectional view showing a second embodiment of the present invention. In the second embodiment shown in FIG. 2, a single-plate damper 15 is provided in place of the second damper 7 and the mechanical filter 12 of the first embodiment, and the single-plate damper 15 is attached to the voice coil bobbin 10. The upper end of the is supported. A diaphragm 16 is attached to the frame 4 via an edge 16a. The damper 15 and the vibrating plate 16 which are made of one plate are joined at a point 17 on the central axis OO by adhesion or the like.

The other structure of the second embodiment is the same as that of the first embodiment.

Also in the loudspeaker of the second embodiment constructed as described above, the weight action point and the suspension fixing point can be installed on the same line, so that the center of gravity when the loudspeaker is driven and the support point are deviated. It is possible to reduce the rolling due to.

Moreover, since the diaphragm (cone paper) 16 can be formed into a perfect conical shape, the strength can be increased, the divided vibration mode can be reduced, and the reflection action from the edge 16a can be reduced. Thus, distortion deformation of the voice coil 9 can be reduced. Then, in the subwoofer of the present invention, as shown in FIG. 4, when it is combined with a full range speaker, a wide band can be reproduced without using a network circuit.

[0018]

As described above, according to the first aspect of the present invention.
In the described invention, the mechanical filter is provided in the upper part in the voice coil, and the mechanical filter and the diaphragm are provided.
Since they are connected at a single point on the central axis and the weight action point and the suspension fixing point can be installed on the same line, rolling due to the shift between the center of gravity and the support point when driving the speaker is reduced. Since the diaphragm can be formed into a perfect conical shape, the strength can be increased, the divided vibration mode can be reduced, and the reflection effect from the edge can be reduced. Therefore, distortion deformation of the voice coil can be reduced. There is also an effect.

In the invention according to claim 2 of the present invention,
The upper end of the voice coil bobbin is supported by the one-plate damper, and the one-plate damper and the vibration plate are connected at a single point on the central axis. Also in the present invention,
Since the point of action of weight and the fixed point of suspension can be installed on the same line, there is an effect that rolling due to the shift between the center of gravity and the supporting point when the speaker is driven can be reduced, and the diaphragm is completely conical. Since it can be formed in a shape, the strength can be increased, the divided vibration mode can be reduced, and the reflection action from the edge can be reduced. Therefore, distortion deformation of the voice coil can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 3 is a sound pressure-frequency characteristic diagram of a general subwoofer.

FIG. 4 is a sound pressure-frequency characteristic diagram of the subwoofer and the full-range speaker of the present invention.

FIG. 5 is a vertical sectional view showing a conventional speaker including a mechanical filter.

[Explanation of symbols]

1 Yoke 2 Magnet 3 Plate 4 Frame 6 1st Damper 7 2nd Damper 9 Voice Coil 10 Voice Coil Bobbin 12 Mechanical Filter 13 Diaphragm 13a Edge for Mounting Diaphragm O-O Speaker Center Axis 14 Coupling of Mechanical Filter and Diaphragm One point as a part 15 1-plate damper 16 Vibration plate 16a Edge for attaching a vibration plate 17 1 Point as a connecting part of a 1-plate damper and a vibration plate

Claims (2)

[Claims] 1. A speaker having a mechanical filter (12), wherein the mechanical filter (12) is provided above a voice coil bobbin (10), and the mechanical filter (12) and a diaphragm (13) are centrally disposed. A speaker characterized by being connected at one point (14) on an axis (OO). 2. A speaker in which an upper end portion of a voice coil bobbin (10) is supported by a single-plate damper (15), and the single-plate damper (15) and the diaphragm (16) are connected to each other by a central axis (O). -O) One point on (17)
A speaker characterized by being combined with.