JP2006197259A - Edge for speaker, and speaker unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an edge for a speaker, capable of exhibiting superior response performance even for minute input and preventing lack of linearity as a support system in the whole input region, from minute input to the maximum input. <P>SOLUTION: The edge 9 for a speaker has a cross sectional structure in which a plurality of rolls 23, 24 are continuously provided along the radial direction of a diaphragm 8, and is coupled to a speaker frame 6 so as to be displaced to the external periphery of the diaphragm 8 in an axial direction. In the edge 9, the rolls 23, 24 are differentiated from each other in any one of thickness, radius of curvature of the rolls, roll width and material, thereby differentiating the elastic characteristics as the support system, and the rolls having weak elastic strength are utilized for response performance at the time of minute input. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker edge that is coupled to a speaker frame so that an outer periphery of a diaphragm is axially displaceable, and a speaker unit using the edge.

In the speaker unit, the outer periphery of the diaphragm is coupled to the speaker frame, and the following various performances are required.
(1) Airtightness that blocks air flow before and after the diaphragm.
(2) Vibration performance that does not resonate with the vibration of the diaphragm (anti-resonance performance).
(3) Damping performance that quickly attenuates vibration of the diaphragm.

In order to provide such various performances in a well-balanced manner, improvements have been accumulated in the material forming the edge, the cross-sectional shape, and the like.
In general, the shape of the cross section along the radial direction of the diaphragm is formed in a roll shape, the flange part joined to the diaphragm on the inner periphery of the roll part, and the edge pressing part of the speaker frame on the outer periphery of the roll part The thing of the structure which extended the flange part which adhere | attaches to is prevailing.

In recent years, a plurality of roll portions are arranged along the radial direction of the diaphragm for the purpose of improving the responsiveness to the input to the diaphragm, improving the vibration damping performance, increasing the vibration stroke, etc. The thing of the cross-sectional structure which continued was proposed.
FIG. 1 shows a conventional example of such a speaker edge.
The speaker edge 101 has two roll portions 103 and 104 that are convex on the front side of the speaker. The inner peripheral portion of the inner roll portion 103 has a flange portion 106 that is bonded to the outer peripheral edge of the diaphragm. A flange portion 107 is attached to the outer peripheral edge of the outer roll portion 104 so as to adhere to the edge pressing portion of the speaker frame.

  The number of roll parts to be continuous is not limited to two. There is also a series of three or more roll parts, and a corrugated shape by alternately combining a convex roll part on the front side of the speaker and a concave roll part on the front side of the speaker, or the front side of the speaker In addition, a configuration in which a plurality of concave roll portions are appropriately continued has been proposed (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

Japanese Patent No. 3161075 JP 2002-135890 A Japanese Examined Patent Publication No. 6-67034

  However, in the case of a conventional speaker edge, a plurality of roll portions continuous along the radial direction of the diaphragm have the same thickness, radius of curvature, roll width, etc., and the elastic characteristics are monotonous. Therefore, the input range that can sufficiently exhibit resonance resistance performance and vibration suppression performance is narrow.For example, the thickness of each roll part and the radius of curvature of the roll are set so that sufficient resonance resistance performance and vibration suppression performance can be obtained at the maximum input. When the roll width or the like is set, there is a problem that the response to a minute input is lowered and the linearity as a support system becomes insufficient.

  The problem to be solved by the present invention is that it has a wide input range that can sufficiently exhibit anti-resonance performance and vibration suppression performance, can exhibit excellent responsiveness even for very small inputs, Providing a speaker edge that can prevent the lack of linearity as a support system in the input area, and by using the speaker edge, it is highly faithful in all input areas from minute input to maximum input. Providing a speaker edge and a speaker unit that can realize reproduction is an example.

  The speaker edge according to claim 1 has a cross-sectional structure in which a plurality of roll portions are continuous along the radial direction of the diaphragm, and is coupled to the speaker frame so that the outer periphery of the diaphragm can be displaced in the axial direction. It is an edge for speakers, and each roll part has different elastic characteristics as a support system by making different at least one of thickness, radius of curvature of roll, roll width and material. It is characterized by.

  A speaker unit according to a sixth aspect is characterized in that the outer periphery of the diaphragm is coupled to the speaker frame by the speaker edge according to any one of the first to fifth aspects.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a speaker unit equipped with a speaker edge according to the invention will be described in detail with reference to the drawings.
FIG. 2 is a longitudinal sectional view of a first embodiment of the speaker unit using the speaker edge according to the present invention, and FIG. 3 is an enlarged sectional view of the speaker edge shown in FIG.

  The speaker unit 21 shown in FIG. 2 has a speaker frame 6 coupled to an upper portion of a magnetic circuit 5 constituted by a lower plate 2 having a center pole 1, a ring-shaped magnet 3, and a ring-shaped upper plate 4. An edge 9 coupled to the outer periphery of the diaphragm 8 together with the gasket 7 is coupled to the periphery of the speaker frame 6 with an adhesive or the like, and a voice coil 10 is adhesively coupled to the center of the diaphragm 8. The lower portion of the voice coil 10 is fitted into the magnetic gap 12 of the magnetic circuit 5 without being eccentric, and a dust cap 13 is attached to the center upper surface of the diaphragm 8. .

  As shown in FIG. 3, the edge 9 of the present embodiment continues the two roll portions 23, 24 along the radial direction of the diaphragm 8, and the roll portion 23 on the radially inner side of the diaphragm 8. A flange 23a that is bonded and bonded to the diaphragm 8 is extended on the inner periphery, and a flange portion 24a that is bonded and fixed to the speaker frame 6 is extended on the outer periphery of the outer roll portion 24. In addition, the outer periphery of the diaphragm 8 is coupled to the speaker frame 6 so as to be displaceable in the axial direction.

In the case of the present embodiment, the conditions of the curvature radius, roll width, material, etc. of the rolls 23 and 24 are the same, but by changing the thickness, the elastic characteristics as a support system can be obtained. I make them different.
Specifically, the thickness t1 of the roll portion 23 on the radially inner side of the diaphragm 8 is in the range of 30% to 95% of the thickness t2 of the roll portion 24 located on the outer side. t1 is set smaller than the wall thickness t2.

The roll portions 23 and 24 of the edge 9 described above have different elastic characteristics by making the wall thickness, which is one of the elements that determine the elastic characteristics, different. Due to the difference in the elastic characteristics, the roll portions 23 and 24 have different input ranges in which the anti-resonance performance and the vibration suppression performance can be sufficiently exhibited, and the entire edge 9 has sufficient anti-resonance performance and vibration suppression performance. The input range that can be demonstrated in a wider range.
Therefore, it is possible to exhibit excellent responsiveness even to a minute input, and it is possible to prevent a lack of linearity as a support system in the entire input range from the minute input to the maximum input.

In addition, as described above, since the roll elements 23 and 24 have the same other elements (the radius of curvature of the roll, the roll width, and the material) that determine the elastic characteristics, the roll part 23 positioned on the inner side is the outer roll. Since the thickness is set thinner than that of the portion 24, the weight is reduced and the elastic deformation is facilitated, and a large displacement with excellent responsiveness can be allowed even if the driving force by the voice coil is small. Therefore, excellent responsiveness can be exhibited even for a minute input.
On the other hand, the roll portion 24 on the radially outer side of the diaphragm 8 is heavier than the inner roll portion 23, so that the thickness is increased and it is difficult to elastically deform with a small input. Since the displacement is allowed with an appropriate response, an excellent response is ensured even for a large input.
Accordingly, it is possible to prevent the lack of linearity as a support system in the entire input range from the minute input to the maximum input.

In addition, when the thick roll part 24 and the thin roll part 23 are combined and the edge 9 as a whole corresponds to a wider input area, if the thickness of the thin roll part 23 is excessively thin, a minute input Although a satisfactory result can be obtained in terms of improving the response to, the thin roll portion 23 may sag for large inputs, and the characteristics as the edge 9 may be deteriorated.
However, as described above, when the thickness difference between t1 and t2 is regulated, such inconvenience does not occur, and the edge 9 as a whole can correspond to a wider input range, It is possible to prevent the lack of linearity as a support system in the entire input range from the minute input to the maximum input.

  In the speaker unit 21 using the edge 9, the edge 9 can exhibit excellent responsiveness even to a minute input, and the linearity as a support system is insufficient in the entire input region from the minute input to the maximum input. Therefore, even in the case of a minute input, the amplitude operation faithful to the input of the diaphragm 8 can be performed, and high fidelity reproduction can be realized in the entire input range from the minute input to the maximum input. it can.

In addition, in the point that the elastic characteristics of each roll part 23 and 24 differ by making the thickness of a roll part different, contrary to the thickness setting in said 1st Embodiment, each roll It is also possible to set the thickness of the part.
FIG. 4 shows an example in which the thickness t2 of the outer roll portion 24 is set thinner than the thickness t1 of the inner roll portion 23 so that the outer roll portion 24 has responsiveness at the time of minute input. I have to.
However, considering the effect of improving the responsiveness by reducing the weight of the unsprung load, the thickness t1 of the inner roll portion 23 is set to be greater than the thickness t2 of the outer roll portion 24 as described in the first embodiment. It is more advantageous to make it thinner.

  The above roll portions 23 and 24 are not limited to the case where the thicknesses are different from each other, and the elastic properties can be changed by changing any of the conditions such as the radius of curvature of the roll, the roll width, and the material. In addition, due to the change in the elastic characteristics, the response to the input of the diaphragm 8 and the allowable displacement amount are changed, and the anti-resonance performance and the damping performance are changed.

  FIG. 5 shows an example in which the elastic characteristics as the support system of the roll portions 23 and 24 are made different by making the radii of curvature of the rolls different.

In the case of FIG. 5A, an example in which the radius of curvature r2 of the roll of the roll portion 24 positioned on the radially outer side of the diaphragm 8 is set larger than the radius of curvature r1 of the roll of the roll portion 23 positioned on the inner side. Show.
In the case of FIG. 5B, an example in which the radius of curvature r2 of the roll of the roll portion 24 located on the radially outer side of the diaphragm 8 is set smaller than the radius of curvature r1 of the roll of the roll portion 23 located on the inner side. Show.

  When attention is paid to the correlation between the curvature radius of the roll and the resistance against the amplitude, the resistance is small when the curvature radius of the roll is large, and the resistance is large when the curvature radius is small. Further, when the radius of curvature is small, the shape support force in the amplitude direction of the diaphragm 8 is increased.

  In other words, the roll portion having a large curvature radius has a lower elastic strength than the roll portion having a small curvature radius, and it is possible to obtain excellent responsiveness to minute inputs. In addition, since the roll part with a small radius of curvature supports large inputs, it can not only demonstrate excellent response to minute inputs, as well as when the thickness of the roll parts is different, but also from minute inputs. It is possible to prevent the lack of linearity as a support system in the entire input range up to the maximum input.

In addition, when different curvature radii are used between the roll parts to make the elastic strength of each roll part different, if the small curvature radius is set to 30% or more and 95% or less of the large curvature radius, the curvature radius In addition to preventing the elastic strength of the larger roll part from becoming too low and exhibiting excellent responsiveness to minute inputs, linearity as a support system in the entire input range from minute inputs to maximum inputs It becomes possible to prevent the shortage.
As shown in FIG. 5 (b), if the radius of curvature of the outer roll portion 24 is set smaller than that of the inner roll portion 23, the spring is springed as in the case where the thickness of the roll portions is different. The response can be improved by reducing the load, which is advantageous.

  FIG. 6 shows an example in which the elastic characteristics as the support system of the roll parts 23 and 24 are made different by making the roll widths of the respective roll parts different.

6A shows an example in which the roll width w2 of the roll portion 24 located on the radially outer side of the diaphragm 8 is set smaller than the roll width w1 of the roll portion 23 located on the inner side.
6B shows an example in which the roll width w2 of the roll portion 24 located on the outer side in the radial direction of the diaphragm 8 is set larger than the roll width w1 of the roll portion 23 located on the inner side.

When the roll width is small, the radius of curvature of the roll is inevitably reduced, the elastic strength is increased, and the resistance to the amplitude of the diaphragm 8 is increased, as shown in the figure.
That is, the roll part having a larger roll width has a lower elastic strength than the roll part having a smaller roll width, and it is possible to obtain excellent responsiveness to minute inputs. In addition, since the roll part with a small roll width can handle large inputs, it can not only demonstrate excellent responsiveness to minute inputs, as with the case where the thickness of the roll parts is different, but also from minute inputs. It is possible to prevent the lack of linearity as a support system in the entire input range up to the maximum input.

In addition, when different roll widths are used for different roll parts to make the elastic strength of each roll part different, the roll width can be reduced by setting the small roll width to 30% or more and 95% or less of the large roll width. In addition to preventing the elastic strength of the larger roll part from becoming too low and exhibiting excellent responsiveness to minute inputs, linearity as a support system in the entire input range from minute inputs to maximum inputs It becomes possible to prevent the shortage.
In addition, as shown to Fig.6 (a), if the roll width of the outer side roll part 24 was set smaller than the inner side roll part 23, it will spring like the case where the thickness of roll parts mutually differs. The response can be improved by reducing the load, which is advantageous.

  FIG. 7 shows an example in which the elastic characteristics as the support system of the roll parts 23 and 24 are made different by making the materials of the respective roll parts different.

7A shows an example in which the material of the roll portion 24 located on the outer side in the radial direction of the diaphragm 8 is set to a material having higher elastic strength than the material of the roll portion 23 located on the inner side. .
In the case of FIG. 6B, an example is shown in which the material of the roll portion 24 located on the outer side in the radial direction of the diaphragm 8 is set to a material having lower elastic strength than the material of the roll portion 23 located on the inner side. .

  The material of the edge includes elastomer, foamed urethane, rubber, cloth, paper, and the like, and the elastic strength can be adjusted by changing the composition by adjusting the additives. As a combination of materials having different elastic strengths, when one roll part is made of cloth and the other roll part is made of urethane, one roll part is made of cloth and the other roll part is made of rubber, When the roll part is made of elastomer and the other roll part is made of urethane, when one roll part is made of elastomer and the other roll part is made of rubber, when one roll part is made of elastomer and the other roll part is made of cloth When one roll part is made of urethane and the other roll part is made of rubber, various other combinations are conceivable.

  Similar to the case where the thickness of the roll part is made different by giving the roll part made of a material with low elastic strength a small input and giving the roll part made of a material with high elastic strength a big input. In addition to exhibiting excellent responsiveness to minute inputs, it is possible to prevent a lack of linearity as a support system in the entire input range from minute inputs to maximum inputs.

  In the above embodiment, as a means for differentiating the elastic strength between the roll parts 23 and 24, the case where any one of the thickness, the radius of curvature of the roll, the roll width and the material is different is shown. Two or more of the thickness, the radius of curvature of the roll, the roll width, and the material may be made different so that desired elastic characteristics are imparted to each roll portion.

  Moreover, in the said embodiment, although the structure where two roll parts continue in the radial direction of the diaphragm 8 was shown, it is also considered as a structure where three or more roll parts continue as an edge structure.

  Moreover, the roll part made to continue is not restricted to a roll-shaped thing convex toward the front of a speaker like the said embodiment. A configuration in which concave roll portions are continuous toward the front of the speaker, or a corrugation structure in which convex roll portions and concave roll portions are alternately connected toward the front of the speaker is also possible.

  As described above in detail, the speaker edge and the speaker unit 21 according to each embodiment of the present invention have a cross-sectional structure in which a plurality of roll portions 23 and 24 are continuous along the radial direction of the diaphragm 8. The speaker edge 9 is coupled to the speaker frame 6 so that the outer periphery of the diaphragm 8 can be displaced in the axial direction, and the roll portions 23 and 24 each have a thickness, a radius of curvature of the roll, a roll width, and a material. By making at least one of them different, the elastic characteristics of the support system are made different, so the input range that can fully exhibit anti-resonance performance and vibration control performance is wide, and it is excellent even for minute inputs Responsiveness can be demonstrated, and the lack of linearity as a support system can be prevented in the entire input range from minute input to maximum input.Furthermore, by using the edge for the speaker, all input from minute input to maximum input can be achieved. In the input area, It is possible to achieve a degree faithful reproduction.

It is a longitudinal cross-sectional view of the principal part of the conventional edge for speakers. It is a longitudinal cross-sectional view of 1st Embodiment of the speaker unit using the edge for speakers which concerns on this invention. It is an expanded sectional view of the edge for speakers shown in FIG. It is an expanded sectional view of 2nd Embodiment of the edge for speakers which concerns on this invention. (A) is an expanded sectional view of 3rd Embodiment of the edge for speakers concerning this invention, (b) is an expanded sectional view of 4th Embodiment of the edge for speakers concerning this invention. (A) is an expanded sectional view of the fifth embodiment of the speaker edge according to the present invention, and (b) is an enlarged sectional view of the sixth embodiment of the speaker edge according to the present invention. (A) is an expanded sectional view of the seventh embodiment of the speaker edge according to the present invention, and (b) is an enlarged sectional view of the eighth embodiment of the speaker edge according to the present invention.

Explanation of symbols

5 Magnetic Circuit 6 Speaker Frame 8 Diaphragm 9 Edge (Speaker Edge)
21 Speaker unit 23 Roll part r1, r2 Curvature radius t1, t2 Wall thickness w1, w2 Roll width

Claims (6)

A speaker edge having a cross-sectional structure in which a plurality of roll portions are continuous along the radial direction of the diaphragm, and coupled to the speaker frame so that the outer periphery of the diaphragm can be displaced in the axial direction.
The speaker edges characterized in that each roll part has different elastic characteristics as a support system by making at least one of the thickness, the radius of curvature of the roll, the roll width, and the material different. .   The speaker edge according to claim 1, wherein the thickness of the roll portion located on the radially inner side of the diaphragm is set to be smaller than the thickness of the roll portion located on the outer side.   The thickness t1 of the roll portion located on the radially inner side of the diaphragm is set to be 30% or more and 95% or less of the thickness t2 of the roll portion located on the outer side. The edge for speakers described in 1.   The roll width w2 of the roll part located on the radially outer side of the diaphragm is set to 30% or more and 95% or less of the roll width w1 of the roll part located on the inner side. The speaker edge according to claim 1.   2. The radius of curvature r2 of the roll of the roll portion located on the outer side in the radial direction of the diaphragm is set to be 30% or more and 95% or less of the curvature radius r1 of the roll of the roll portion located on the inner side. The edge for speakers as described in any one of thru | or 4.   6. A speaker unit, wherein the outer periphery of the diaphragm is coupled to the speaker frame by the speaker edge according to claim 1.

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