JPH05122791A - Speaker edge - Google Patents

Abstract

PURPOSE:To improve the acoustic characteristic by dividing a circular part in the circular direction and alternately changing the width or material. CONSTITUTION:The intensity of the circular part divided in the circular direction of the edge is alternately changed, and a part with low edge intensity in the ample amplitude is changed in the amplitude direction. On the other hand, a part with high edge intensity functions as a base material, which is pinched between parts with low intensity, and it is less necessary to shift in the circular direction to enable ample displacement in the amplitude direction, resulting in providing the superior linearity in power/displacement characteristic. Thus, the edge for speaker with less distortion on acoustic characteristic can be realized.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, since digital signal processing technology has advanced dramatically, the quality of electric signals supplied to a speaker has been significantly improved, and a speaker capable of reproducing high-quality sound has been demanded correspondingly. ing. For high-quality sound reproduction,
It is desirable that the edge, which is one of the support members of the vibration system of the speaker, can be sufficiently displaced even at a large amplitude, and that its force-displacement characteristic is linear. For that purpose, the edge must be displaceable not only in the vibration direction but also in the circumferential direction. In addition, the edge must sufficiently function as a support material. At present, as a means for solving these problems, the shape of the edge is formed into a roll shape to give a certain amplitude function and a support function, and a material having high elasticity such as urethane is used to provide the amplitude function. The material is used as an edge material.

A conventional speaker edge will be described below. FIG. 3 shows a conventional speaker edge. In the figure, 1 is a roll part, 2 is a vibrating plate, 3 is a frame, and 4 and 5 are pasting parts to the vibrating plate and the frame, respectively.

The conventional speaker edge is made of the same material with a uniform thickness in the circumferential direction.

[0005]

In such a conventional technique, in order to realize the linearity in the force-displacement characteristic of the edge even at a large amplitude, the amplitude function is increased by increasing the diameter of the roll portion of the edge. Must be expanded. As a result, the edge becomes large in area, the sound radiation from the edge cannot be ignored, and this causes distortion in the acoustic characteristics of the speaker. In addition, if the edge has a large area, it does not function as a support material and rolling easily occurs, and this problem also causes distortion in the acoustic characteristics of the speaker. Therefore, since the current speaker edge cannot have a sufficient amplitude function and support function, the acoustic characteristics are distorted due to nonlinearity and rolling.

The present invention provides a speaker edge which is capable of sufficient displacement even at a large amplitude, has excellent linearity in force-displacement characteristics, and at the same time sufficiently functions as a supporting material. The purpose is to improve.

[0007]

In order to achieve the above object, the present invention has a structure in which an arc portion is divided in the circumferential direction of an edge, and the thickness or material of each of the divided arc portions is made different from each other. I am trying.

[0008]

According to the present invention, the strength of the circular arc portion divided in the circumferential direction of the edge changes alternately, and even when the amplitude is large, the location where the edge strength is small is only in the amplitude direction. Instead, it enables sufficient displacement in the circumferential direction, and on the contrary, the place where the strength of the edge is large fulfills the function as a support material, and the place where the strength of the edge is large is sandwiched between the places where the strength is small. Therefore, the necessity of displacement in the circumferential direction is reduced, and sufficient displacement in the amplitude direction is possible, resulting in excellent linearity in the force-displacement characteristic.

[0009]

EXAMPLE A first example of the present invention is shown in FIG. In the figure, 6 is a roll part, 7 is a diaphragm, 8 is a frame,
Reference numerals 9 and 10 respectively denote portions to be attached to the diaphragm and the frame, and in this embodiment, the arc portion is equally divided.

The operation of the above configuration will be described. In general, the speaker edge is made by pressing a sheet-shaped material having a uniform thickness with a mold. Therefore, when one sheet is pressed, if the finished thickness of the edge is alternately changed with respect to the circular arc portion divided in the circumferential direction, the density of the material varies depending on the thickness, so that the circular arc portions are alternately formed. The intensity will change. In such a structure, the thick edge portion is less dense and easier to stretch than the thin portion, so it is not sufficient as a support function when the vibration system makes an amplitude motion, but not only in the amplitude direction but also on the edge circumference. A sufficient displacement in the direction becomes possible. On the other hand, the thin part has a high density and is harder than the thick part, so it plays a sufficient role as a supporting function, and the thick part bears the displacement in the circumferential direction, and the thin part has a small displacement in that direction. As a result, sufficient displacement is possible even in the amplitude direction.

Although not shown in the figure, the amplitude function and the supporting function can be arbitrarily changed by changing the division ratio of the arc portion of the edge, and the edge having the amplitude function and the supporting function can be easily adjusted according to the purpose. Obtainable. In the present embodiment, the example in which the circular arc portion is equally divided has been described, but it is not necessary to divide the arc portion exactly.

Next, a second embodiment (FIG. 2) is shown. In the present embodiment, an example in which the arc portion is equally divided will be described.

The major difference from the first embodiment is that the thickness of the edge is uniform in the circumferential direction, but the arcuate portions divided in the circumferential direction are made of different materials. In this way, the same function as that of the first embodiment can be obtained by alternately changing the strength of the material of the arc portions.
That is, since the soft edge portion is more apt to stretch than the hard edge portion, it is not sufficient as a supporting function, but it is possible to sufficiently displace the edge not only in the amplitude direction but also in the circumferential direction. On the contrary, the hard part not only plays a sufficient role as a supporting function, but the soft part bears the displacement in the circumferential direction, so that the hard part can be sufficiently displaced also in the amplitude direction.

Although not shown in the drawing like the first embodiment, an edge having an amplitude function and a supporting function according to the purpose can be easily obtained by changing the division ratio of the arc portion of the edge. You can In the present embodiment, the example in which the circular arc portion is equally divided has been described, but it is not necessary to divide the arc portion exactly.

[0015]

As described above, according to the present invention, the circular arc portion is divided in the circumferential direction, and the thickness or the material of each divided circular arc portion is alternately changed. It is possible to provide a speaker edge that is capable of sufficient displacement and that also fulfills a role as a supporting function. At this time, the amplitude function and the support function can be arbitrarily changed by changing the division ratio of the arc portion of the edge, and an edge having the amplitude function and the support function according to the purpose can be easily obtained. As described above, the present invention can solve the problem that the conventional edge cannot simultaneously realize the sufficient amplitude function and the supporting function, and therefore, the straight line excellent in the force-displacement characteristic, which cannot be obtained by the conventional speaker edge, can be solved. It is possible to realize an edge for a speaker that has a good property and has very little distortion given to the acoustic characteristics.

[Brief description of drawings]

FIG. 1 is a structural cross-sectional view of a speaker edge according to a first embodiment of the present invention.

FIG. 2 is a structural sectional view of a speaker edge according to a second embodiment of the present invention.

FIG. 3 is a structural cross-sectional view of a conventional speaker edge.

[Explanation of symbols]

 6 Roll part 7 Vibration plate 8 Frame 9, 10 Sticking part

Claims (8)

[Claims] 1. An edge for a speaker, characterized in that the edges have different thicknesses in the circumferential direction. 2. An edge for a speaker, characterized in that an arc portion is divided in a circumferential direction, and the thickness of each of the divided arc portions is changed alternately. 3. The speaker edge according to claim 2, wherein the circular arc portion divided in the circumferential direction is equally divided. 4. The speaker edge according to claim 2, wherein the division ratio is different depending on the thickness. 5. An edge for a speaker, which is made of materials having different circumferential directions. 6. The speaker edge according to claim 5, wherein the circular arc portion is divided in the circumferential direction, and the material of each of the divided circular arc portions is changed alternately. 7. The speaker edge according to claim 6, wherein the circular arc portion divided in the circumferential direction is equally divided. 8. The speaker edge according to claim 6, wherein the division ratio is different depending on the material.