JP2004312599A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker of which performance is improved by solving non-linearity, asymmetry and the like to reduce higher harmonic wave distortion, in the speaker to be used for various acoustic apparatuses. <P>SOLUTION: In the speaker, a suspension holder 17 for coupling the inner periphery is provided on the side of a magnetic circuit 12 rather than a diaphragm 15 of a voice coil 13, the non-linearity and the asymmetry of a whole suspension are canceled by a first edge 15a of the diaphragm 15 and a second edge 17a of the suspension holder 17, power linearity is also improved to improve the performance of the speaker, a fine braided wire is held in a groove provided on the suspension holder 17 to make possible a direct lead scheme, and man-hour for assembling the speaker can be also reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a loudspeaker used for various audio equipment and the like.
[0002]
[Prior art]
A conventional speaker has a configuration as shown in FIG.
[0003]
That is, the conventional speaker includes a magnetic circuit 1, a voice coil 4 having at least a coil portion 3 movably provided in a magnetic gap 2 of the magnetic circuit 1, and a portion outside the magnetic gap 2 of the voice coil 4. The diaphragm 5 has an inner periphery connected thereto, and a frame 7 having an outer periphery connected to the diaphragm 5 via an edge 6.
[0004]
That is, by inputting an electric signal output from an audio amplifier or the like to the voice coil unit 3 of the voice coil 4, the voice coil 4 vibrates, the vibrating force is transmitted to the diaphragm 5, and the diaphragm 5 It was configured to convert electric signals into voice by vibrating air.
[0005]
Note that the above-described example of the conventional speaker is extremely general, and is described in Patent Document 1 as a conventional technique.
[0006]
[Patent Document 1]
JP 2003-37894 A
[Problems to be solved by the invention]
In the above-described conventional technique, the inner periphery of the damper 8 is fixed between the voice coil portion 3 of the voice coil 4 and the inner periphery fixed portion of the diaphragm 5, and the outer periphery of the damper 8 is fixed to the frame 7. The damper 8 forms a suspension together with the edge 6 so that the voice coil 4 does not roll when it moves. Further, the damper 8 has a configuration in which a plurality of waveforms are combined so that the movable load of the voice coil 4 is minimized.
[0008]
However, in the recent improvement in the performance of the speaker, the presence of the damper 8 has caused a great problem.
[0009]
That is, in the behavior of the voice coil 4 toward the magnetic circuit 1 and the behavior toward the opposite side to the magnetic circuit 1, the non-linearity and asymmetry of the movable load of the damper 8 are large, resulting in large harmonic distortion. At the same time, the power linearity was also going to deteriorate.
[0010]
In order to solve the problems of power linearity deterioration and harmonic distortion characteristics caused by such non-linearity and asymmetry, conventionally, various devices have been tried to solve the non-linearity and asymmetry of the damper 8. However, as described above, since the damper 8 is formed by combining a plurality of waveforms so as to reduce the movable load, the non-linearity is at least as long as the suspension is constituted by combining the damper 8 and the edge 6. At present, it is difficult to reduce the harmonic distortion by solving the problem of asymmetry or asymmetry, and the performance of the speaker has not been improved. Therefore, an object of the present invention is to improve the performance of a speaker.
[0011]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a speaker having a magnetic circuit having a magnetic gap, wherein at least a coil portion of the magnetic circuit is movably provided in the magnetic gap of the magnetic circuit. A voice coil, a diaphragm having an inner periphery connected to an outer portion of a magnetic gap of the voice coil, and a frame having an outer periphery of the diaphragm connected via a first edge. An inner periphery of a suspension holder is connected to the magnetic circuit side from the diaphragm of the voice coil, and an outer periphery of the suspension holder is connected to the frame via a second edge. These first and second edges are connected to the frame. The suspension is constituted by the first edge and the second edge in a substantially symmetrical similar shape with a boundary between the first and second edges. The first edge and the second edge can cancel their own asymmetry while eliminating the damper which causes the non-linearity and asymmetry, thereby fundamentally reducing the non-linearity and asymmetry of the suspension. Thus, the harmonic distortion of the speaker can be reduced, the power linearity can be improved, and the performance of the speaker can be improved.
[0012]
Further, by providing a groove for inserting the gold wire connecting the voice coil and the terminal in a substantially normal direction of the suspension holder, the gold wire can be stably arranged and a direct lead method can be realized.
[0013]
Next, the invention of a speaker according to claim 2 of the present invention provides a magnetic circuit having a magnetic gap, a voice coil having at least a coil portion movably provided in the magnetic gap of the magnetic circuit, A diaphragm whose inner periphery is connected to a portion outside the magnetic gap of the coil, and a frame whose outer periphery is connected via a first edge, wherein the diaphragm of the voice coil is An inner periphery of the suspension holder is connected to the magnetic circuit side, and an outer periphery of the suspension holder is connected to the frame via a second edge, and the first and second edges are connected to the first and second edges. The diaphragm and the suspension holder are connected to each other at an intermediate portion thereof while having a substantially symmetrical similar shape with a boundary therebetween, and a first edge and a second edge are provided. Since the damper that causes the non-linearity and asymmetry of the suspension is eliminated by configuring the suspension more, the first edge and the second edge are arranged so as to cancel the asymmetry of the suspension itself. The nonlinearity and asymmetry of the suspension can be fundamentally solved, and the resulting harmonic distortion reduction and power linearity of the speaker can be improved to improve the performance of the speaker.
[0014]
Further, by connecting the diaphragm and the suspension holder at their intermediate portions, the phases of the two can be matched, and the frequency characteristics of the middle and low frequency range resulting from this can be flattened.
[0015]
Further, by providing a groove for inserting the gold wire connecting the voice coil and the terminal in a substantially normal direction of the suspension holder, the gold wire can be stably arranged, and the direct lead method can be realized.
[0016]
According to a third aspect of the present invention, in the speaker according to the first or second aspect, a notch is provided in an inner peripheral portion of the suspension holder, and a fixing portion between the gold thread wire and the voice coil bobbin is provided. Thus, the direct read method can be easily realized by avoiding the interference.
[0017]
According to a fourth aspect of the present invention, in the loudspeaker according to the first and second aspects, a projection is provided on both sides of a groove for inserting a gold thread wire of the suspension holder, thereby facilitating a direct lead system. Is realized.
[0018]
According to a fifth aspect of the present invention, in the loudspeaker according to the fourth aspect, the projections provided on both sides of the groove for inserting the gold thread wire of the suspension holder are partially formed with respect to a substantially normal direction of the suspension holder. With such a configuration, the direct read method can be easily realized.
[0019]
According to a sixth aspect of the present invention, in the loudspeaker according to the fifth aspect, a projection partially provided in a substantially normal direction of the suspension holder is provided at an asymmetrical position on the left and right with respect to the groove. The direct read method is easily realized.
[0020]
According to a seventh aspect of the present invention, in the loudspeaker according to the first or second aspect, a notch is provided in an inner peripheral portion of the diaphragm so that a fixing portion between the gold thread wire and the voice coil bobbin is provided. Therefore, the direct read method can be easily realized by preventing the interference with the direct read method.
[0021]
The speaker according to the eighth aspect of the present invention is the speaker according to the seventh aspect, in which a notch is provided only in a neck portion of the diaphragm which is adapted to be along the voice coil bobbin, thereby easily adopting a direct lead system. It will be realized.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0023]
(Embodiment 1)
FIG. 1 is a cross-sectional view of a speaker according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a suspension holder that is a main part of the speaker. This embodiment mainly describes claims 1 and 2. Things.
[0024]
According to the figure, 12 is a magnetic circuit having a magnetic gap 12a, 13 is a voice coil having at least a coil portion 14 movably provided in the magnetic gap 12a of the magnetic circuit 12, and 15 Reference numeral 16 denotes a diaphragm having an inner periphery connected to an outer portion of the magnetic gap of the voice coil 13; 16 denotes a frame having an outer periphery of the diaphragm 15 connected via a first edge 15a; Is a suspension holder whose inner periphery is connected to the magnetic circuit 12 side from the diaphragm 15 of the voice coil 13 and whose outer periphery is connected to the frame 16 via a second edge 17a. It has a groove 21 for inserting a gold wire 20 connecting the voice coil 13 and the terminal 19 in the normal direction.
[0025]
The suspension holder 17 is mainly made of pulp and resin that have both high rigidity and internal loss. Although the second edge 17a connects the outer periphery of the suspension holder 17 to the frame 16, the movable edge of the suspension holder 17 is reduced in the same manner as the first edge 15a reduces the movable load of the diaphragm 15. Materials such as urethane, rubber, and cloth are used so as to reduce the pressure.
[0026]
Further, the first edge 15a protrudes in the direction of the magnetic circuit 12, the second edge 17a protrudes in the opposite direction of the magnetic circuit 12, and the first and second edges 15a, 17a are substantially at the middle therebetween. It has a symmetric similar shape.
[0027]
Further, by providing a suspension by the suspension holder 17 and the second edge 17a between the voice coil 13 and the frame 16 in place of the conventional damper, the suspension holder 17 and the second edge 17a become the first edge. 15a constitutes a suspension and suppresses rolling of the voice coil 13 when moving.
[0028]
By configuring the suspension as described above, it is possible to eliminate a damper that causes a non-linearity and an asymmetry of the suspension, and the first edge 15a and the second edge 17a have their own asymmetry. Since the shape is substantially symmetric and similar to cancel the characteristics, specifically, the first edge 15a and the second edge 17a are arranged to face each other so that the protruding directions are opposite to each other. The linearity and the asymmetry can be solved.
[0029]
Further, since the suspension holder 17 has a groove 21 for inserting a gold wire 20 for connecting the voice coil 13 and the terminal 19 in a substantially normal direction, the gold wire 20 is connected to the suspension holder as described above. By being buried and fixed in the groove 21 of 17, it is fixed to the suspension holder 17 even during assembling in the manufacturing process, and even before the diaphragm 15 is fixed, the position is stable and it is easy to use the direct lead method. Can be assembled. In addition, since the gold wire 20 is mechanically held, the direct lead method can be realized stably in terms of quality.
[0030]
Further, in the present embodiment, the diaphragm 15 and the suspension holder 17 are connected to each other at an intermediate portion thereof. However, by this, the phases of the both can be matched, and the frequency characteristic of the middle and low frequency range caused by this can be adjusted. Can be flattened, and a higher performance speaker can be provided.
[0031]
When the diaphragm 15 and the suspension holder 17 are not connected at the intermediate portion as described above, it goes without saying that the above-described effects can be obtained except for the effects of matching phases and the effects due to this.
[0032]
(Embodiment 2)
Another embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
[0033]
FIG. 3 is a perspective view of a suspension holder which is a main part of another embodiment of the present invention.
[0034]
Since the only difference between the present embodiment and the first embodiment is the suspension holder, the configuration will be described with reference to FIG. 3. When the structure is described, reference numeral 22 denotes a suspension holder. By providing the notch 22b so as to avoid interference with the fixing portion A (shown in FIG. 1), the dust holder net or the like is arranged. Even if it is not possible to construct without it, a direct lead system can be easily realized by passing through the notch.
[0035]
Reference numeral 22a denotes a groove provided between the voice coil 13 and the terminal 19, which is provided in a substantially normal direction of the suspension holder 22, and in which the gold wire 20 is inserted. As shown in the figure, the groove 22a is provided on the inner peripheral side to the notch 22b, and the gold wire 20 is pulled out without being interfered by the suspension holder 22 by the coil portion 14.
[0036]
(Embodiment 3)
Another embodiment of the present invention will be described with reference to a perspective view of a suspension holder which is a main part of FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0037]
Since the only difference between the present embodiment and the second embodiment is the suspension holder, the structure will be described with reference to FIG. By providing the projections 23c on the, the gold thread wire 20 can be held more stably. As shown in the figure, the groove 23a is provided on the inner peripheral side to the notch 23b, and the gold wire 20 is pulled out without being interfered by the suspension holder 23 by the coil portion 14.
[0038]
(Embodiment 4)
Another embodiment of the present invention will be described with reference to a perspective view of a suspension holder which is a main part of FIG. The same parts as those in the third embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
[0039]
The present embodiment differs from the third embodiment only in the suspension holder 24, and is partially provided with protrusions 24c provided on both sides of the groove 24a through which the gold wire 20 of the suspension holder 24 passes.
[0040]
With this configuration, even when the suspension holder and the diaphragm have various shapes, the direct lead method can be realized while maintaining the holding effect of the gold thread wire. As shown in the figure, the groove 24a is provided on the inner peripheral side to the notch 24b, and the gold wire 20 is pulled out without being interfered by the suspension holder 24 by the coil portion 14.
[0041]
(Embodiment 5)
Another embodiment of the present invention will be described with reference to a perspective view of a suspension holder which is a main part of FIG. The same parts as those in the fourth embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
[0042]
The present embodiment is different from the fourth embodiment only in the suspension holder 25, and the projections 25c provided partially on both sides of the groove 25a for passing the gold thread wire 20 of the suspension holder 25 are symmetrical with respect to the groove 25a. It is installed in a place where it will not be located.
[0043]
According to the present invention, even when the size of the projection 25c is the same as that of the fourth embodiment, since the projection 25c is arranged at a position that is not symmetrical with respect to the groove 25a, the gold wire 20 can be efficiently removed from the groove 25a. Since it can be prevented well, more stable speaker assembly can be realized by the direct lead method. As shown in the drawing, the groove 25a is provided on the inner peripheral side to the notch 25b, and the gold wire 20 is pulled out without being interfered by the suspension holder 25 by the coil portion 14.
[0044]
(Embodiment 6)
Another embodiment of the present invention will be described with reference to a perspective view of a diaphragm which is a main part of FIG.
[0045]
According to the figure, reference numeral 26 denotes a vibration plate, and like the notches 22b to 25b on the inner peripheral side provided in the suspension holders 22 to 25 described in the second to fifth embodiments, the inside of the vibration plate 26 A notch 26a corresponding to the circumference is provided.
[0046]
According to this method, since the interference between the gold wire 20 and the diaphragm 26 of the fixed portion on the voice coil 13 side can be prevented, the mounting position of the diaphragm 26 can be set close to the gold wire 20 and a direct lead method is realized. In addition, the thickness of the speaker can be reduced.
[0047]
The diaphragm 26 according to the present embodiment can be applied to any of the speakers according to the above-described second to fifth embodiments.
[0048]
(Embodiment 7)
Another embodiment of the present invention will be described mainly with reference to the eighth embodiment with reference to a perspective view of a diaphragm which is a main part of FIG.
[0049]
The difference between the loudspeakers of the present embodiment and the sixth embodiment is only the diaphragm, and only the difference will be described. The diaphragm 27 is partially cut out in a vertical portion along the voice coil 13. By providing the 27a, it is possible to easily realize the direct lead system and to make the speaker thinner, to secure the adhesive strength between the diaphragm and the voice coil, and to improve the sound quality.
[0050]
【The invention's effect】
The loudspeaker of the present invention configured as described above can reduce harmonic distortion of the loudspeaker, improve the power linearity, improve the performance of the loudspeaker, and directly connect the voice coil and the gold wire. Since the direct lead method of joining can be adopted, the number of assembling steps of the speaker can be reduced.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an embodiment of a speaker according to the present invention. FIG. 2 is a perspective view of a suspension holder which is a main part of the speaker. FIG. 3 is a perspective view of a suspension holder which is a main part of another embodiment. FIG. 4 is a perspective view of a suspension holder as a main part of the other embodiment. FIG. 5 is a perspective view of a suspension holder as a main part of the other embodiment. FIG. FIG. 7 is a perspective view of a diaphragm which is a main part of another embodiment. FIG. 8 is a perspective view of a diaphragm which is a main part of another embodiment. FIG. 8 is a perspective view of a diaphragm which is a main part of the other embodiment. FIG. 9 is a cross-sectional view of a conventional speaker.
Reference Signs List 12 magnetic circuit 12a magnetic gap 13 voice coil 14 coil part 15, 26, 27 diaphragm 15a first edge 16 frame 17, 22, 23, 24, 25 suspension holder 17a second edge 19 terminal 20 gold wire 21, 22a , 23a, 24a, 25a Grooves 22b, 23b, 24b, 25b Notches 23c, 24c, 25c Projections 26a, 27a Notch A Fixing part

Claims (8)

A magnetic circuit having at least a magnetic gap, a voice coil having at least a coil portion movably provided in the magnetic gap of the magnetic circuit, and an inner periphery connected to a portion outside the magnetic gap of the voice coil. And a frame having an outer periphery of the diaphragm connected via a first edge, wherein an inner periphery of a suspension holder is connected to the magnetic circuit side of the voice coil from the diaphragm. The outer periphery of the suspension holder is connected to the frame via a second edge, and the first and second edges are substantially symmetric and similar with a boundary between the first and second edges. A speaker provided with a groove for inserting a gold thread wire connecting the coil portion and the terminal in a substantially normal direction of the suspension holder. A magnetic circuit having at least a magnetic gap, a voice coil having at least a coil portion movably provided in the magnetic gap of the magnetic circuit, and an inner periphery connected to a portion outside the magnetic gap of the voice coil. And a frame having an outer periphery of the diaphragm connected via a first edge, wherein an inner periphery of a suspension holder is connected to the magnetic circuit side of the voice coil from the diaphragm. The outer periphery of the suspension holder is connected to the frame via a second edge, and the first and second edges have a substantially symmetric similar shape with the boundary between the first and second edges. At the same time, the diaphragm and the suspension holder are joined together at an intermediate portion thereof, and furthermore, the voice coil is moved in a direction substantially normal to the suspension holder. Le a speaker provided with a groove which interleave the tinsel line connecting the terminals. 3. The loudspeaker according to claim 1, wherein a notch is provided in an inner peripheral portion of the suspension holder to prevent interference between a gold thread wire and a fixing portion of the voice coil bobbin. The speaker according to claim 1 or 2, wherein projections are provided on both sides of the groove for inserting the gold thread wire of the suspension holder. The speaker according to claim 4, wherein the projections provided on both sides of the groove for inserting the gold wire of the suspension holder are partially provided in a substantially normal direction of the suspension holder. 6. The loudspeaker according to claim 5, wherein the protrusions provided partially in the substantially normal direction of the suspension holder are provided at asymmetric positions on the left and right with respect to the grooves. 3. The loudspeaker according to claim 1, wherein a notch is provided on an inner peripheral portion of the diaphragm to prevent interference between the gold wire and a fixed portion of the voice coil bobbin. The loudspeaker according to claim 7, wherein a notch is partially provided in a vertical portion of the diaphragm that extends along the voice coil bobbin.

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