JPH0851695A - Speaker - Google Patents

Abstract

PURPOSE:To provide a speaker of high sound quality which has a wide reproduction range and small distortion even when having an elliptic frame, etc., as to a speaker which is used for various sound equipments. CONSTITUTION:A diaphragm 6 which has a voice coil 7 coupled in the center is coupled with the peripheral edge part of the frame 5 which is coupled with the upper part of a magnetic circuit 4, and the inner peripheral part of a damper 12 which has the long-diameter directional outer peripheral part coupled with a frame 5 and is formed in one of an elliptic, a rectangular, and a long circular shape is coupled with the intermediate part of the voice coil 7. Consequently, the damper 12 is increased in area, made large in flexibility, and also increased in amplitude, so the speaker of high sound quality which has the wide reproduction range and small distortion can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used in various audio equipment.

[0002]

2. Description of the Related Art With the recent miniaturization of audio equipment, the space for mounting a speaker is also narrowed, and it is necessary to slim the speaker. Further, with the spread of high-quality sources, it has become indispensable to have a speaker with high sound quality.

Such a conventional speaker will be described below with reference to the drawings. FIG. 5 is a cross-sectional view showing a configuration of a conventional speaker, showing a minor diameter side and a major diameter side of a rectangular speaker, a magnet 2 is coupled to an upper portion of a bottom plate 1, and a top plate is coupled to an upper portion of the magnet 2. Magnetic circuit 4 in which magnetic gap 8 is formed by coupling 3
Is composed. A frame 5 formed in an elliptical shape, a rectangular shape, or an oval shape is provided above the magnetic circuit 4.
, The outer peripheral portion of the diaphragm 6 is joined to the peripheral edge of the frame 5, and the voice coil 7 is joined to the center of the diaphragm 6, and the voice coil 7 is fitted into the magnetic gap 8. The voice coil 7 is composed of a circular damper 9 having an inner peripheral portion coupled to the middle portion and an outer peripheral portion entirely coupled to the frame 5.

FIG. 6 is a plan view for explaining the positional relationship between the frame 5 and the damper 9 of the conventional speaker shown in FIG. 5 in detail. Since the damper 9 has a circular shape, the damper 9 is shown in FIG. The diameter of was even less than the lateral width of the frame 5 even in the maximum case.

[0005]

However, in the above-mentioned conventional structure, since the shape of the damper 9 is circular, the outer diameter of the damper 9 cannot be made larger than the lateral width of the frame 5, and therefore the lateral width is narrow. In the case of an elliptical, oval or rectangular speaker, the outer diameter of the damper 9 is small, the flexibility is small, and the amplitude cannot be large. As a result, a speaker with a narrow reproduction band and high distortion is obtained. It had a problem that

The damper 9 is used to increase the amplitude.
If the roll is made larger, rolling in the major axis direction is likely to occur in the case of an elliptical, oval, or rectangular speaker, and this rolling cannot be prevented.
Has a problem that it hits the top plate 3 and an abnormal sound is generated.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above conventional problems and provide a high-quality speaker having a wide reproduction band and low distortion.

[0008]

In order to solve this problem, the speaker of the present invention is formed in an elliptical shape, an oval shape, or a rectangular shape that is connected to the upper part of a magnetic circuit having a magnetic gap. A frame, a diaphragm having a voice coil fitted in the magnetic gap centered on the center, and a diaphragm having a peripheral edge coupled to the peripheral edge of the frame, an inner peripheral portion coupled to an intermediate portion of the voice coil, and a major axis direction. The outer peripheral portion of the damper is composed of a damper formed in one of an elliptical shape, a rectangular shape, and an oval shape, which is connected to a frame.

[0009]

With the above-mentioned structure, the damper has a structure in which the area of the damper can be increased, the flexibility can be increased, and the amplitude can be increased, so that a speaker with a wide reproduction band and low distortion can be provided. be able to.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a structure of a speaker according to the embodiment, and is a cross-sectional view showing a minor diameter side and a major diameter side of a rectangular speaker, and FIG. 2 is a positional relationship between a frame and a damper of the speaker. FIG. 3 is a perspective view of a damper used in the same speaker, and FIG. 3 is a perspective view of the damper. The same components as those of the speaker described in the above-mentioned conventional example are designated by the same reference numerals.

In FIG. 1, a bottom plate 1, a magnet 2 and a top plate 3 are combined to form a magnetic gap 8 on the top of a magnetic circuit 4, which is formed in an elliptical shape, an oval shape or a rectangular shape. The frame 5 is joined, the outer peripheral portion of the diaphragm 6 is joined to the peripheral edge of the frame 5, and the voice coil 7 fitted in the magnetic gap 8 is joined to the center of the diaphragm 6, The inner peripheral portion is joined to the intermediate portion and the outer peripheral portion in the major axis direction is connected to the frame 5
It is composed of a damper 12 connected to the.

Further, as shown in FIG. 2, the damper 12 has a diameter larger than the lateral width of the frame 5, as shown in FIG.

FIG. 3 is a perspective view showing the structure of the damper 12, in which the adhesive portion 10 and the rising portion 11 with the frame 5 are provided only in the major axis direction, and the adhesive portion 10 and the rising portion 11 are provided in the minor axis direction. Therefore, a gap is formed between the outer peripheral portion of the damper 12 in the minor axis direction and the bottom surface of the frame 5.

FIG. 4A is a characteristic diagram comparing the sound pressure frequency characteristics of the speaker according to this embodiment with the same characteristics of the conventional speaker, and FIG. 4B is a distortion frequency characteristic of the speaker according to this embodiment and the conventional characteristics. It is a characteristic diagram comparing the same characteristics of the speaker, the solid line shows the speaker of the present embodiment, the broken line shows the conventional speaker.

As is apparent from FIGS. 4A and 4B, the speaker according to this embodiment is superior to the conventional speaker in both the reproduction band and the distortion level.

As described above, in the speaker according to the present invention, by making the dimension of the damper 12 in the major axis direction larger than the lateral width of the frame 5, the flexibility of the damper 12 can be increased, so that the reproduction band can be expanded. it can.
Further, since the bonding portion 10 and the rising portion 11 with the frame 5 are not provided in the minor axis direction of the damper 12, the amplitude movement of the voice coil 7 is not restricted, and the amplitude can be made large, so that the distortion can be reduced. It is possible to provide a speaker with high sound quality.

In the present embodiment, the damper 12 has a structure in which the adhesive portion 10 and the rising portion 11 to the frame 5 are eliminated in the minor axis direction, but the present invention is not limited to this, and the shorter portion is not limited thereto. It goes without saying that the same effect as that of the present embodiment can be obtained even if the adhesive portion 10 and the rising portion 11 are provided in the radial direction and are coupled to the frame 5 as in the case of the major axis direction.

[0019]

Since the speaker according to the present invention is configured as described above, the flexibility of the damper is increased to expand the reproduction band, and since the amplitude can be increased, the distortion can be reduced and the speaker with high sound quality can be obtained. Can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a speaker according to an embodiment of the present invention.

FIG. 2 is a plan view showing a positional relationship between a speaker frame and a damper in the embodiment.

FIG. 3 is a perspective view of a damper used in the same embodiment.

FIG. 4A is a characteristic diagram comparing the sound pressure frequency characteristics of the speaker of the example and a conventional speaker. FIG. 4B is a characteristic diagram comparing the distortion frequency characteristics of the speaker of the example and the conventional speaker.

FIG. 5 is a cross-sectional view showing the configuration of a conventional speaker.

FIG. 6 is a plan view showing a positional relationship between a frame of a conventional speaker and a damper.

[Explanation of symbols]

 1 Bottom Plate 2 Magnet 3 Top Plate 4 Magnetic Circuit 5 Frame 6 Vibration Plate 7 Voice Coil 8 Magnetic Gap 10 Adhesive Part 11 Rise Part 12 Damper

Claims (1)

[Claims] 1. A magnetic circuit having a magnetic gap, a frame formed on the upper surface of the magnetic circuit and having an elliptical shape, a rectangular shape, or an oval shape, and a voice coil fitted in the magnetic gap. And a diaphragm whose peripheral portion is connected to the outer periphery of the frame, and an elliptical or rectangular shape in which the inner peripheral portion is connected to the middle portion of the voice coil and the outer peripheral portion in the major axis direction is connected to the frame. , A speaker consisting of a damper formed in one of an oval shape.