JP4134450B2 - Speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker used in various audio equipment and video equipment.
[0002]
[Prior art]
A conventional speaker will be described with reference to a side sectional view of FIG.
[0003]
In the figure, reference numeral 1a denotes a magnetic circuit. The magnetic circuit 1a includes a bottom plate 1 having a center pole, a ring-shaped magnet 2 fixed to the bottom plate 1, and a top plate fixed to the upper surface of the magnet 2. 3 is a magnetic gap provided in the magnetic circuit 1a formed by the bottom plate 1, the ring-shaped main magnet 2 and the top plate 3, and 5 is a frame coupled to the magnetic circuit 1a.
[0004]
Reference numeral 6 denotes a voice coil held in a magnetic gap 4 formed by the inner periphery of the top plate 3 and the outer peripheral surface of the center pole of the bottom plate 1. Reference numeral 7 denotes an inner peripheral frame fixed to the voice coil 6. A suspension fixed to the frame 5, 8 is a diaphragm having an inner periphery fixed in the vicinity of the tip of the voice coil 6, and the diaphragm 8 is fixed to the frame 5 through an edge 9, and 10 is a vibration. It is a dust cap attached to the center upper surface of the plate 8. In addition, a is the total height of the speaker comprised by the said components.
[0005]
The operation of the conventional speaker configured as described above will be described below.
[0006]
First, when an electric signal is applied to the voice coil 6 of the speaker, a driving force is generated in the magnetic gap 4. This driving force is transmitted from the voice coil 6, vibrates the diaphragm 8 fixed to the tip, and emits a sound corresponding to the vibration.
[0007]
Particularly, the vibration of the diaphragm 8 is supported by the edge 9 and the amplitude is controlled according to the input.
[0008]
The suspension 7 supports the voice coil 6 so as to vibrate up and down.
[0009]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, when the input applied to the speaker increases, the shape of the suspension 7 and the edge 9 fixed to the voice coil 6 and the frame 5 are different from each other. Even if it is configured in a thin shape such as a butterfly suspension, the shape of the edge 9 is different from that of the suspension 7 and is supported in the form of a roll type or a corrugated type. The difference in the balance of the individual amplitude behavior becomes more significant as the input increases, leading to an increase in harmonic distortion. The support of the voice coil 6 of the suspension 7 and the edge 9 also loses linearity, and the voice coil 6 Cannot be held in the magnetic gap 4 accurately, and as a result, abnormal sound is generated or the voice coil 6 is damaged. It was but also could lead to to say.
[0010]
Therefore, it is difficult to improve the input resistance and increase the power, and the usage is greatly restricted. Furthermore, since the shape of the edge 9 is formed by a roll type or a corrugated type, the overall height a of the speaker also increases as a result, which is one of the obstacles to the realization of a thin speaker. It was.
[0011]
The present invention solves the above-mentioned conventional problems, suppresses the generation of harmonic distortion due to the difference in the shape of the suspension and the edge, improves non-uniform linearity, maintains uniform linearity, and maintains high power and low power. An object of the present invention is to provide a speaker that can be thinned and has excellent acoustic performance that achieves both distortion.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, a speaker according to the present invention includes at least a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil fitted into a magnetic gap of the magnetic circuit, and a movable arm portion extending in a rotating direction. the bonded inner circumference to the voice coil provided, and the suspension attached to the frame of the outer periphery, and the outer periphery bonded to the inner circumference to the voice coil attached to the frame diaphragm, other movable extending in the direction of rotation The arm part is provided and the edge of the diaphragm is provided with a skin layer covering the surface, and the conditions for supporting the voice coil of the movable arm part of the suspension and the other movable arm part of the edge are approximated. Uniform linearity that suppresses the generation of harmonic distortion due to differences in the shape of the suspension and diaphragm edges and improves non-uniform linearity While maintaining obtained by a thin possible structure than conventional edge by the edge using other movable arms, it made it possible to provide the speaker with excellent acoustic performance for both high power and low-distortion Is.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the speaker of the present invention, there is provided at least a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil fitted in a magnetic gap of the magnetic circuit, and a movable arm extending in a rotating direction. part combine the inner circumference to the voice coil in which a, a suspension coupled to the frame periphery, a diaphragm coupled to the frame an outer periphery bonded to the inner circumference to the voice coil, the other that lengthening extending in the direction of rotation In addition, the shape of the edges of the suspension and the diaphragm is high even at high power when a large input is input to the speaker. In addition to suppressing the generation of harmonic distortion due to differences and improving non-uniform linearity, it has a structure that can be thinned while maintaining uniform linearity. Those that can provide a speaker with excellent acoustic performance for both word and low-distortion.
[0014]
The invention according to claim 2 of the present invention is such that the extending direction of the movable arm portion of the suspension in claim 1 and the extending direction of the other movable arm portion of the edge of the diaphragm are the opposite rotational directions. In addition, it is possible to provide a speaker having excellent linearity by preventing rolling due to the rotational action in the extending direction of the cross-linking of each movable arm portion, which becomes a problem at the time of large input.
[0015]
The invention according to claim 3 of the present invention is such that the extending direction of the movable arm portion of the suspension of claim 1 is changed from the rotational direction to the radial direction, eliminating the occurrence of rotational action at the amplitude of the suspension, This makes it possible to provide an excellent speaker having a support system that linearly follows from input to high input.
[0016]
The invention according to claim 4 of the present invention has a structure in which the movable arm portion of the suspension of claim 1 has two or more meandering bent portions, and extends and bridges toward the outer periphery. Thus, it is possible to provide a speaker capable of high input resistance that can reduce the tension at the time of amplitude accompanying the flattening of the suspension and can increase the amount of amplitude when high input is applied.
[0017]
The invention according to claim 5 of the present invention is such that the extending direction of the other movable arm portion of the edge of the diaphragm according to claim 1 or 3 is the radial direction, and the generation of a rotating action at the time of amplitude is generated. It is possible to provide an excellent speaker with low distortion and high linearity that suppresses, stabilizes the amplitude behavior and eliminates the rotation mode.
[0018]
An embodiment of a speaker according to the present invention will be described below with reference to FIGS. In the description, the same parts as those in the prior art are denoted by the same reference numerals, and description thereof is omitted.
[0019]
(Embodiment 1)
FIG. 1 is a side sectional view of a speaker according to an embodiment of the present invention, FIG. 2 is a plan view of a suspension that is the main part, and FIG. 3 is a plan view of a diaphragm that is the main part. FIG. 4 is a frequency characteristic diagram showing sound pressure frequency characteristics and second harmonic distortion characteristics of a conventional speaker and the present embodiment.
[0020]
11 is a planar suspension, and 12 is a planar diaphragm, each of which has an inner peripheral side fixed to and bonded to the voice coil 6.
[0021]
Reference numeral 13 denotes an edge of the planar diaphragm 12 that joins the outer periphery of the planar diaphragm 12 and the frame 5, and is formed by a slit generated by forming another movable arm portion 16 provided on the edge 13 described later. In order to block the air flow, a skin layer 14 that is appropriately selected so as to cover the edge 13 and to move the other movable arm portion 16 is formed.
[0022]
Reference numeral 15 denotes a movable arm portion formed by a slit in the middle of the inner and outer peripheries of the plane suspension 11, and this movable arm portion 15 is rotated in the rotation direction c when the voice coil 6 is driven up and down by the slit as shown in FIG. Move to stretch toward.
[0023]
Reference numeral 16 denotes another movable arm portion formed by a slit on the inner peripheral side of the planar diaphragm edge 13. This movable arm portion 16 also rotates in the direction d when the voice coil is driven up and down as shown in FIG. Move to stretch toward . Further, the movable arm portion 15 and the other movable arm portion 16 are arranged with a certain angle θ.
[0024]
In the present embodiment, even at high power when a large input is input to the loudspeaker with the above configuration, generation of harmonic distortion due to the difference in shape of the edge 13 of the suspension 11 and the diaphragm 12 is suppressed and non-uniform linearity is achieved. It has a structure that can be thinned while maintaining uniform linearity, and can achieve both high power and low distortion that can be applied under any input conditions.
[0025]
FIG. 4 shows the sound pressure frequency characteristic and the second harmonic distortion characteristic of the conventional speaker and the present embodiment. The speaker of the present embodiment has the sound pressure frequency characteristic 23 of the conventional speaker over the entire band. In comparison, it was confirmed that the sound pressure frequency characteristic 22 was flat and high, and it was confirmed that the reproduction was extended also in the low sound range and the mid sound range of the sound pressure frequency characteristic.
[0026]
In addition, it was confirmed that the second harmonic distortion of the present embodiment 24 is lower than that of the conventional one 25, and a high linearity can be obtained.
[0027]
(Embodiment 2)
Another embodiment of the speaker of the present invention will be described with reference to FIG.
[0028]
FIG. 5 is a plan view of a suspension which is a main part of another embodiment of the speaker of the present invention. Only the differences between the first embodiment and the present embodiment will be described with reference to the same drawing. Reference numeral 17 denotes a rotation in the direction opposite to the other movable arm portion 16 formed on the edge 13 of the planar diaphragm 12 as shown in FIG. It is a movable arm part formed so as to extend in the counterclockwise direction e.
[0029]
In the present embodiment, the extending direction of the movable arms 17 of the planar suspension 11 is provided with a movable arm portion 17 extending in the rotational direction e of the other with the movable arms 16 backward edge 13 of the diaphragm 12 As a result, the rolling due to the rotational action in the bridging direction of the individual movable arm portions 16 and 17 which becomes a problem at the time of large input is prevented, and excellent linearity is achieved.
[0030]
(Embodiment 3)
Another embodiment of the speaker of the present invention will be described with reference to FIG.
[0031]
FIG. 6 is a plan view of a suspension which is a main part of another embodiment of the speaker of the present invention. Only the differences between the first embodiment and the present embodiment will be described with reference to the same figure. Unlike the movable arm portion 16 formed on the edge 13 of the planar diaphragm 12, 18 is movable not in the rotational direction but mainly in the radial direction. It is a movable arm part. A plurality of movable arm portions 18 which are not linear but have one bending point 19 and which are symmetrical with respect to the base line for each angle θ are provided.
[0032]
In the present embodiment, the amplitude of the planar suspension 11 of the first embodiment is such that the direction of the movable arm portion 18 of the planar suspension 11 has no directivity when the voice coil 6 is driven up and down and extends in the radial direction f. This eliminates the occurrence of rotational action and can maintain a support system that linearly follows from low input to high input.
[0033]
(Embodiment 4)
Another embodiment of the speaker of the present invention will be described with reference to FIG.
[0034]
FIG. 7 is a plan view of a suspension which is a main part of another embodiment of the speaker of the present invention. Only the difference between the third embodiment and the present embodiment will be described with reference to the same figure. The movable arm portion 20 provided with a plurality of bending points is used, and a plurality of sets are formed symmetrically on the circumference. Yes.
[0035]
In the present embodiment, since the movable arm portion 20 is provided with a plurality of bent portions, the tension at the time of the amplitude accompanying the flattening of the suspension 11 is further reduced, and the amount of amplitude when a high input is applied is increased. Therefore, it is possible to achieve higher input resistance of the speaker.
[0036]
(Embodiment 5)
Another embodiment of the speaker of the present invention will be described with reference to FIG.
[0037]
FIG. 8 is a plan view of a diaphragm which is a main part of another embodiment of the speaker of the present invention. Only the differences between the first embodiment and the present embodiment will be described with reference to the same drawing. Reference numeral 21 denotes another movable arm portion which is formed on the edge 13 of the planar diaphragm 12 and has no directionality in the rotational direction. A plurality of sets of the movable arm portions 21 are symmetrically formed in the radial direction g and on the circumference.
[0038]
In the present embodiment, the extending direction of the other movable arm portion 21 provided on the inner peripheral side of the edge 13 of the planar diaphragm 12 is formed by a slit so as to be the radial direction g instead of the rotational direction. In addition, it is possible to provide a speaker having low distortion and high linearity by suppressing the generation of a rotating action at the amplitude of the suspension 11 and the edge 13 of the diaphragm 12 and by stabilizing the amplitude behavior of each support system and eliminating the rotation mode. Is. Further, by applying the edge of the present embodiment to the speaker based on the third embodiment, it is possible to provide a better speaker.
[0039]
In each of the above-described embodiments, the shape of the suspension, the diaphragm, and the edge has been described as an example of a planar shape. However, any shape can be used as long as it has a movable arm portion or other movable arm portion. The same effect can be obtained even with a product.
[0040]
The skin layer 14 may be any layer that can perform the edge function by suppressing the air permeability of the edge 13, and may be selected as appropriate. At least when the movable arm portions 16 and 21 are formed, air flows from the slit. As long as the edge 13 is covered so as to suppress this, the degree is not limited.
[0041]
【The invention's effect】
As described above, the speaker of the present invention has the shape of the edge of the suspension and the diaphragm even at high power when a large input is input to the speaker by the movable arm portion provided on the suspension and the other movable arm portion provided on the edge. It is possible to provide a speaker that can suppress the generation of harmonic distortion due to differences, improve non-uniform linearity, maintain uniform linearity, and achieve both high power and low distortion, and can be thinned. is there.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an embodiment of a speaker of the present invention. FIG. 2 is a plan view of a suspension that is the main part. FIG. 3 is a plan view of a diaphragm that is the main part. FIG. 5 is a characteristic view of sound pressure frequency characteristics and second harmonic distortion characteristics of the invention and a conventional speaker. FIG. 5 is a plan view of a suspension which is a main part of the other embodiment. FIG. 7 is a plan view of a suspension that is the main part of the other embodiment. FIG. 8 is a plan view of a diaphragm that is the main part of the other embodiment. ] Cross-sectional view of a conventional speaker [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a Magnetic circuit 4 Magnetic gap 5 Frame 6 Voice coil 11 Suspension 12 Diaphragm 13 Edge 14 of diaphragm 15 Skin layers 15, 17, 18, 20 Movable arm parts 16, 21 Other movable arm parts

Claims (5)

Coupling at least a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil fitted in a magnetic gap of the magnetic circuit, the inner circumference to the voice coil having a movable arm that lengthening extending in the direction of rotation and, a suspension coupled to the frame of the outer periphery, so as to cover a diaphragm coupled to the frame an outer periphery bonded to the inner circumference to the voice coil, the surface provided with the other movable arms that lengthening extending in the direction of rotation A speaker constituted by an edge of the diaphragm provided with a skin layer.   The speaker according to claim 1, wherein the extending direction of the movable arm portion of the suspension and the extending direction of the other movable arm portion of the edge of the diaphragm are opposite to each other.   The speaker according to claim 1, wherein the extending direction of the movable arm portion of the suspension is a radial direction.   The speaker according to claim 1, wherein the movable arm portion of the suspension has two or more meandering bent portions and extends toward the outer periphery.   The speaker according to claim 1 or 3, wherein the extending direction of the other movable arm portion of the edge of the diaphragm is a radial direction.

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