JPH09275598A - Centering spider for speaker and speaker using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the butterfly damper centering spider by which a damage of the speaker due to torsion of spokes attended with piston vibration of the speaker is prevented and a large input is applied to the speaker while a small effective mass is kept and secondary resonance is hardly caused. SOLUTION: The centering spider is made up of 4 couples of spokes 1a, and rings 1b, 1c. One end of each spoke la is connected to the ring 1b and the other end is connected to the ring 1c. The four couples of the spokes la are made up of spokes 1aa, 1ab in pairs while being curved opposite to each other in the vibration direction stereoscopically. When a piston vibration is caused in the speaker, since the middle part of the spokes 1aa, 1ab is expanded/ contracted, no torsional vibration is caused in the spokes 1a and no stress is caused at the connection part of the rings 1b, 1c adhered to a voice coil bobbin and a frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centering spider that holds a voice coil connected to a diaphragm of an electrodynamic speaker at the center of a magnetic gap composed of a magnetic circuit.

[0002]

2. Description of the Related Art There is a cone type speaker which is one of the electrodynamic type speakers. FIG. 10 is a schematic sectional view of the cone-shaped speaker 51. In FIG. 10, a cone-shaped speaker 51 includes a voice coil bobbin 50, a cone diaphragm 52,
A voice coil 53, a magnetic circuit 54, and a center ring spider (commonly known as a damper) 55 that holds the voice coil 53 connected to the cone diaphragm 52 at the center of the magnetic gap formed by the magnetic circuit 54, and a frame 57 are provided. The frame 57 includes an edge 56 connected to the outer periphery of the cone diaphragm 52, the magnetic circuit 54, and the centering spider 5.
5 and edge 56 are supported.

The centering spider 55 of the electrodynamic speaker in the early days is shown in the plan view of FIG. 11 and FIG.
12, which is a sectional view taken along the line D-D of FIG.
A butterfly damper type center ring spider 58 developed from a cantilever type was used.

Butterfly damper type center ring spider 58
Was manufactured by stamping a resin sheet or a woven cloth impregnated with resin with a press machine. The butterfly damper type center ring spider 58 has an advantage that the effective mass is equivalently lightweight, but it is difficult to obtain a large amplitude, and iron powder can be mixed into the magnetic gap from the gap of the butterfly damper type center ring spider 58. There were some drawbacks such as the fact that

As one method of compensating for the above-mentioned drawbacks of the butterfly damper type centering spider 58, there is the use of a corrugation type centering spider 59.
FIG. 13 shows a corrugated center ring spider 5.
9 is a plan view of FIG. 9, and FIG. 14 is a cross-sectional view taken along line EE of FIG. 13.

As shown in FIGS. 13 and 14, the corrugated centering spider 59 has a shape obtained by impregnating a woven cloth made of cotton thread, synthetic resin thread, or the like with resin, and heat-molding into a plurality of concentric circular waveforms. ing.

The corrugated centering spider 59 has an advantage that a large amplitude can be obtained relatively easily.
The effective mass is equivalently heavier than that of the butterfly damper type centering spider 58, and the shape is rotationally symmetric, so that secondary resonance occurs in a band of about 10 times the lowest resonance frequency fo and produces secondary distortion sound. However, there are drawbacks such as that it is easy and that when air flows in and out of the interstices of the texture of the woven cloth, frictional noise is generated and distortion noise is generated. These drawbacks are remarkable in a speaker having a small diameter and a light vibration system.

In recent years, a speaker compatible with digital signal reproduction has the advantage that the effective mass is equivalently light,
There is also an example in which a butterfly damper type centering spider 60 having a shape as shown in FIG. 15 is used.

Generally, the shape of the opening of the speaker is circular, and in order to fix the outer periphery of the centering spider to the frame of the speaker by adhesion, the corrugated centering spider 59 and the butterfly as shown in FIGS. 13 and 15 are used. A damper type centering spider 60 is used. A large-diameter centering spider is required to reduce the minimum resonance frequency fo to a low frequency.

In recent years, in a television set equipped with a wide screen or a display for a personal computer, an oval or elliptical speaker is often used to suppress the width dimension. 16 is a plan view of an oval or elliptical speaker 61, and FIG.
1 is a partial sectional view of FIG. In FIGS. 16 and 17, 6
2 is a butterfly damper type centering spider, 63 is a cone diaphragm, 64 is an edge, 65 is a frame, and 66 is a magnetic circuit.

In this oval or elliptical speaker 61,
When a circular butterfly damper type center ring spider 60 as shown in FIG. 15 is used, the outer dimension of the center ring spider 60 is limited by the dimension w of the minor axis of the speaker 61. Therefore, since the butterfly damper type centering spider 60 cannot have a large diameter, the spoke portion 60a becomes short, the stiffness becomes high, and it becomes difficult to lower the minimum resonance frequency fo.

Therefore, the outer shape of the butterfly damper type centering spider is matched with the shape of the oval and elliptical speaker frame, and four pieces are formed by using the butterfly damper type centering spider 62 having the shape as shown in FIG. The length of the spoke portion 62a is made low to reduce the stiffness to lower the minimum resonance frequency fo.

[0013]

However, in the butterfly damper type center ring spiders 60 and 62 having the shapes shown in FIGS. 15 and 18, the spokes are two-dimensionally curved. For example, in the butterfly damper type centering spider 62, when the speaker vibrates the piston, the spokes 62a in a flat plate shape are curved.
Twists and expands and contracts, which causes the speaker vibrating system to twist and make piston vibrations.

Therefore, the neck portion 60b of the spoke portion 60a, that is, the connecting portion between the ring portion 60c and the spoke portion 60a and the connecting portion between the ring portion 60d and the spoke portion 60a are stressed and damaged when driven with a large amplitude. I have something to do. Similarly, the neck portion 6 of the spoke portion 62a
2b, that is, the connecting portion between the ring portion 62c and the spoke portion 62a and the connecting portion between the ring portion 62d and the spoke portion 62a are stressed and may be damaged when driven with a large amplitude.

Further, since the inner circumferences of the butterfly damper type center ring spiders 60 and 62 are adhered to the cylindrical voice coil bobbin 50, the voice coil bobbin is expanded and contracted by the curved flat plate-shaped spoke portion 60a or 62a. There is a defect that 50 is partially deformed to generate distorted sound and input is limited.

According to the present invention, the equivalent mass of the butterfly damper type centering spider is equivalently small and secondary resonance is unlikely to occur, while the spoke portion is twisted and expanded due to the piston vibration of the speaker. To realize a butterfly damper type centering spider capable of applying a large input to a speaker and a speaker using the same, while preventing damage.

[0017]

The present invention is configured as follows to achieve the above object. In a centering spider that holds a voice coil of a speaker at the center of a magnetic gap, a substantially circular first ring portion bonded to a voice coil bobbin of the speaker and an outer shape larger than the first ring portion, and a speaker frame. A second ring portion that is adhered to the first ring portion and a pair of first ring portion and the second ring portion that are arranged between the first ring portion and the second ring portion and that face each other when viewed from the vibration direction of the speaker and that curve in opposite directions. A spoke section having at least three pairs of the pair of spokes.

When the speaker vibrates back and forth,
Since the center portion of the spoke expands and contracts as if extending, the spoke portion does not generate torsional vibration. as a result,
Stress is less likely to occur at the connecting portion between the spoke coil portion and the ring portion that is bonded to the voice coil bobbin and the frame.

Further, in the center ring spider that holds the voice coil of the speaker at the center of the magnetic gap, the first ring portion has a substantially circular shape that is adhered to the voice coil bobbin of the speaker, and the outer shape is larger than that of the first ring portion. A second ring portion that is adhered to the speaker frame, and is disposed between the first ring portion and the second ring portion, is substantially parallel to each other when viewed from the vibration direction of the speaker, and is A pair of spokes curved in opposite directions, and a spoke portion having at least three pairs of the pair of spokes.

Preferably, in the centering spider, each of the spokes forming the spoke portion has a cross-sectional area from the connecting portion between the spoke and the first and second ring portions toward the center portion of the spoke. It has a shape that becomes smaller.

Since the cross-sectional area becomes smaller toward the center of the spoke, the flexibility of the spoke can be improved and stress may occur at the connecting portion between the ring portion and the spoke portion. , Less than.

Further, preferably, in the above center ring spider, the first ring portion, the second ring portion and the spoke portion are formed by injection molding. Further, preferably, in the centering spider, the spokes have a rectangular, elliptical or circular cross-sectional shape.

Further, in the center ring spider that holds the voice coil of the speaker at the center of the magnetic gap, a substantially circular first ring portion that is adhered to the voice coil bobbin of the speaker and has a larger outer shape than the first ring portion. A first ring portion that is disposed between the first ring portion and the second ring portion and that is bonded to the speaker frame, and that has at least three spokes that bend in the speaker vibration direction. A first spider portion having a spoke portion, a substantially circular third ring portion adhered to the voice coil bobbin of the speaker, and an outer shape larger than the third ring portion and adhered to the speaker frame. No. 4, which has at least three spokes arranged between the third ring portion and the fourth ring portion and curved in the speaker vibration direction. And a second spider portion having a spoke portion of the first spider portion and the second spider portion, the first spoke portion and the second spider portion being viewed from a vibration direction of the speaker. Are bonded so that they curve in opposite directions.

Preferably, in the above centering spider, the first spider portion and the second spider portion are
Each is formed by heat-molding a synthetic resin plate and die-cutting into a predetermined shape.

Further, in the centering spider, preferably, the first spider portion and the second spider portion have the first spoke portion and the second spoke portion which are opposite to each other when viewed in the vibration direction of the speaker. Bonded to face each other.

Preferably, in the above centering spider, the first spider portion and the second spider portion have the first spoke portion and the second spoke portion which are opposite to each other when viewed from the vibration direction of the speaker. It is glued so that it is almost parallel.

Further, in a speaker including a voice coil, a voice coil bobbin, a cone diaphragm, a centering spider that holds the voice coil in the center of the magnetic gap, and a frame that supports these, the centering spider is a voice A substantially circular first ring portion adhered to the coil bobbin, a second ring portion having an outer shape larger than the first ring portion and adhered to the frame, the first ring portion and the second ring portion And a pair of spokes that are disposed between the two and that are opposed to each other when viewed in the vibration direction of the speaker and that are curved in opposite directions, and that have at least three pairs of the pair of spokes.

When the speaker vibrates back and forth with the piston,
Since the center portion of the spoke expands and contracts as if extending, the spoke portion does not generate torsional vibration. as a result,
Stress is less likely to occur at the connecting portion between the spoke coil portion and the ring portion that is bonded to the voice coil bobbin and the frame, durability can be improved, and large input can be applied to the speaker.

A voice coil, a voice coil bobbin, a cone diaphragm and an edge, a centering spider for holding the voice coil at the center of the magnetic gap,
In a speaker including a frame that supports these, the centering spider has a substantially circular first ring portion that is bonded to the voice coil bobbin and an outer shape that is larger than the first ring portion and that is bonded to the frame. And a pair of spokes that are arranged between the first ring portion and the second ring portion, are substantially parallel to each other when viewed from the vibration direction of the speaker, and are curved in opposite directions. And a spoke portion having at least three pairs of the pair of spokes.

A voice coil, a voice coil bobbin, a cone diaphragm and an edge, a centering spider for holding the voice coil at the center of the magnetic gap,
In a speaker including a frame that supports these, the centering spider has a substantially circular first ring portion that is bonded to the voice coil bobbin and an outer shape that is larger than the first ring portion, and is bonded to the frame. Second
First spider part having a ring part and a first spoke part having at least three spokes arranged between the first ring part and the second ring part and curved in the vibration direction of the speaker. A substantially circular third ring portion adhered to the voice coil bobbin, a fourth ring portion having an outer shape larger than the third ring portion and adhered to the frame, a third ring portion and a third ring portion. And a second spider part having at least three spokes curved in the vibration direction of the speaker, the second spider part being disposed between the second spider part and the second spider part. The first spoke portion and the second spoke portion are bonded to each other so that they are curved in opposite directions when viewed from the vibration direction of the speaker.

[0031]

Embodiments of the present invention will be described below with reference to the accompanying drawings. To simplify the description, a circular butterfly damper-shaped center ring spider will be described as an example. 1 is a plan view of a butterfly damper type center ring spider 1 according to a first embodiment of the present invention, and FIG.
FIG. 2 is a sectional view taken along the line AA of FIG. 1. 1 and 2, a butterfly damper type center ring spider 1
Consists of four pairs of spoke portions 1a and ring portions 1b and 1c bonded to the voice coil bobbin and the frame. Then, one end portion of each spoke portion 1a is connected to the ring portion 1b, and the other end portion is connected to the ring portion 1c.

The four pairs of spokes 1a are composed of a pair of spokes 1aa and 1ab which are curved so as to face each other in the vibration direction of the speaker to which the centering spider 1 is attached (front and rear direction of the speaker), It is three-dimensional. FIG. 3 is an operation explanatory diagram of the spoke portion 1a. In FIG. 3, when the speaker vibrates in the front and rear of the speaker as indicated by the arrow, the spoke 1
Since the central portions of aa and 1ab expand and contract as they extend as indicated by the arrows, the spoke portion 1a does not generate the torsional vibration as shown in the conventional example. As a result, the ring portions 1b and 1 which are bonded to the voice coil bobbin and the frame.
Stress is unlikely to occur in the connecting portion 1d with c.

Therefore, according to the first embodiment described above, while maintaining that the effective mass is small and that secondary resonance is unlikely to occur, damage to the spoke portion due to twisting expansion and contraction of the spoke portion due to piston vibration of the speaker. It is possible to realize a butterfly damper type centering spider and a speaker using the butterfly damper type centering spider that can prevent a large input from being applied.

In the above-described first embodiment of the present invention, the spoke portions 1a have four pairs, but the number of spoke portions is not limited to four, and a plurality of pairs of three or more can constitute a spoke portion. Is.

FIG. 4 is a plan view of a butterfly damper type center ring spider 2 according to a second embodiment of the present invention,
FIG. 5 is a sectional view taken along the line BB of FIG. In the first embodiment shown in FIG. 1, the spoke portions 1aa and 1ab are
Are configured to face each other in the vibration direction of the speaker. On the other hand, in the second embodiment shown in FIGS. 4 and 5, these spoke portions 2aa and 2ab are provided.
Seen from the vibration direction of the speaker, the shapes are parallel to each other and are not opposed to each other.

However, the spoke portion 2a is composed of four pairs, is formed between the ring portions 2a and 2b, and is composed of a pair of spoke portions 2aa and 2ab which are curved in opposite directions in the vibration direction of the speaker. The same points as in the first embodiment. Also in the second embodiment, the same effect as in the first embodiment can be obtained.

The above-described first and second embodiments can be formed by injection molding, and the material is, for example, a single material or a mixed material such as polyester resin and polypropylene resin, and is flexible. Any material with

As described above, when the centering spiders 1 and 2 of the first and second embodiments are formed by injection molding, the cross-sectional area of the spoke portion can be adjusted according to the site.

Therefore, for example, in the example of FIG.
As shown in FIG. 6, the spoke portions 1aa and 1ab have a thickened cross-sectional area 1d for connecting the voice coil bobbin and the ring portions 1b and 1c, which are portions to be bonded to the frame, so that the spoke portion 1aa faces the curved center portion 1ac. It is possible to reduce the cross-sectional area and make it thinner.

As a result, the spoke portions 1aa and 1ab
Can further improve the flexibility, and can further reduce the stress on the connecting portion 1d with the ring portions 1b and 1c adhered to the voice coil bobbin and the frame. Also in the example of FIG. 4, similarly, the spoke portions 2aa and 2ab are thickened at a connecting portion with the ring portions 2b and 2c, which are portions to be bonded to the voice coil bobbin and the frame, to have a large cross-sectional area and have a curved center. It is possible to reduce the cross-sectional area toward the portion so as to be thin.

Further, in the embodiment shown in FIGS. 1 and 4, when the injection molding is used, the spoke portions 1aa,
The cross-sectional shapes of 1ab, 2aa, and 2ab are rectangular, oval,
Either circular shape is possible. In this case, as the cross-sectional shape of the spoke changes from rectangular to elliptical and circular,
It is considered that the flexibility of the spokes can be improved.

In the embodiments of FIGS. 1 and 4, the case of forming by injection molding has been described, but the centering spider of the present invention can be formed by a method other than injection molding.

That is, FIG. 7 is an exploded perspective view of a butterfly damper type center ring spider 3 according to a third embodiment of the present invention. In the third embodiment, a predetermined shape is used instead of injection molding. Two butterfly damper-shaped center ring spiders 3a and 3b, which have been heat-molded and die-cut by a press machine, are bonded to each other in opposite directions to form a shape similar to the example of FIG. .

That is, the first center ring spider portion 3a is connected between the ring portion 3ab, the ring portion 3ac, and the ring portions 3ab and 3ac, and bends in the same direction (the vibration direction of the speaker). Three spoke parts 3
formed from ad. Then, the second centering spider portion 3b is the first centering spider portion 3b.
Similar to a, it is formed of a ring portion 3bb, a ring portion 3bc, and four spoke portions 3bd connected between the ring portions 3bb and 3bc and curved in the same direction (the vibration direction of the speaker).

The first centering spider portion 3a is formed so that the spoke portions 3ad and 3bd face each other and are curved in opposite directions.
And the second centering spider portion 3b are bonded together.

Also in the above-described third embodiment of the present invention, the same effect as that of the first embodiment can be obtained.

In the example of FIG. 7, the spoke portion 3a
It is also possible to bond the centering spider parts 3a and 3b so that b and 3bd do not have a shape opposed to each other but have a shape as shown in the example of FIG.

In the embodiment of the present invention shown in FIGS. 1 to 7, an example of the circular shape applied to the circular speaker as shown in FIG. 10 has been described. Also, in the case of an elliptical speaker, the shape may be an ellipse or an ellipse according to the frame shape of the speaker.

FIG. 8 is a plan view of a butterfly damper type center ring spider 4 according to a fourth embodiment of the present invention.
FIG. 9 is a sectional view taken along the line CC of FIG. 8 and 9, the butterfly damper type center ring spider 4
Is composed of four pairs of spokes 4a, a ring 4b and an oval ring 4c which are bonded to the voice coil bobbin and the frame. And each spoke part 4a
One end portion of is connected to the ring portion 4b, and the other end portion thereof is connected to the ring portion 4c.

The four pairs of spokes 4a are three-dimensionally formed by a pair of spokes 4aa and 4ab which are curved so as to face each other in the vibration direction of the speaker. In this fourth embodiment, the ring portion 4 bonded to the frame is used.
Other parts are the same as those in the first embodiment except that C is an elliptical shape.

Also in the above-described fourth embodiment of the present invention, the same effect as in the first embodiment can be obtained.

Since the spokes of the butterfly damper type centering spider according to the above-described embodiment of the present invention are curved in opposite directions and are composed of a pair of spokes, each spoke has Even when secondary resonance occurs, they do not cancel each other out and no distorted sound is produced.

[0053]

Since the present invention is configured as described above, it has the following effects. Since the spokes of the butterfly damper type centering spider of the present invention are each composed of a pair of spokes which are curved in the speaker vibration direction, the spokes expand and contract when the speaker piston vibrates. It is unlikely that the spokes are twisted and vibrated to cause stress at the connecting portion with the voice coil bobbin and the ring portion bonded to the frame. As a result, there is an effect that a large input can be applied.

Therefore, while maintaining that the effective mass of the butterfly damper type centering spider is equivalently small and that secondary resonance is unlikely to occur, damage to the spoke portion due to twist expansion and contraction of the spoke portion due to piston vibration of the speaker. It is possible to realize a butterfly damper type centering spider and a speaker using the butterfly damper type centering spider that can prevent a large input from being applied.

Further, since the stiffness can be adjusted by appropriately changing the degree of curvature of the spokes and the width and thickness of the spokes, a butterfly damper type centering spider having a relatively small diameter can be constructed. As a result, it can be used for a speaker having a relatively small diameter, and the lowest resonance frequency fo can be set low.

[Brief description of drawings]

FIG. 1 is a plan view of a butterfly damper type center ring spider according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an operation explanatory view of the spoke portion shown in FIG.

FIG. 4 is a plan view of a butterfly damper type center ring spider according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along the line BB of FIG. 4;

FIG. 6 is an explanatory diagram of an example in which the cross-sectional area of the spoke portion is changed between the central portion and the end portion.

FIG. 7 is an exploded perspective view of a butterfly damper type center ring spider according to a third embodiment of the present invention.

FIG. 8 is a plan view of a butterfly damper type center ring spider according to a fourth embodiment of the present invention.

9 is a cross-sectional view taken along the line CC of FIG.

FIG. 10 is a cross-sectional view of a conventional speaker. It is a top view of the example of a conventional butterfly damper type form.

FIG. 11 is a plan view of an example of a conventional butterfly damper type centering spider.

12 is a cross-sectional view taken along the line DD of the example of FIG. It is a top view of the form example of the butterfly damper of the conventional oval speaker.

FIG. 13 is a plan view of a conventional corrugated centering spider.

FIG. 14 is a cross-sectional view taken along the line EE of FIG.

FIG. 15 is a plan view of another example of the conventional butterfly damper type centering spider.

FIG. 16 is a plan view of a conventional oval speaker.

17 is a partial cross-sectional view of the conventional oval speaker shown in FIG.

FIG. 18 is a plan view of a butterfly damper type centering spider of a conventional oval speaker.

[Explanation of symbols]

1, 2, 3, 4 Butterfly damper type center ring spider 1a, 2a, 4a Spoke part 1aa, 1ab, 2aa, 2ab Curved spoke part 1b, 1c, 2b, 2c Ring part 1d Connection part 3ab, 3bb, 3ac, 3bc 4b, 4c Ring part 3ad, 3bd, 4aa, 4ab Curved spoke part 50 Voice coil bobbin 51, 61 Speaker 52 Cone diaphragm 53 Voice coil 54 Magnetic circuit 56 Edge 57 Frame

Claims (14)

[Claims] 1. A centering spider for holding a voice coil of a speaker at the center of a magnetic gap, wherein a substantially circular first ring portion adhered to a voice coil bobbin of the speaker and an outer shape larger than the first ring portion. And is disposed between the second ring portion adhered to the speaker frame and the first ring portion and the second ring portion, facing each other in the vibration direction of the speaker, and
A centering spider, comprising a pair of spokes curved in mutually opposite directions, and a spoke portion having at least three pairs of the pair of spokes. 2. A centering spider that holds a voice coil of a speaker at the center of a magnetic gap, wherein a substantially circular first ring portion bonded to a voice coil bobbin of the speaker and an outer shape larger than the first ring portion. Is disposed between the second ring portion adhered to the speaker frame and the first ring portion and the second ring portion, and is substantially parallel to each other when viewed from the vibration direction of the speaker, and A centering spider, comprising: a pair of spokes curved in opposite directions, and a spoke portion having at least three pairs of the pair of spokes. 3. The centering spider according to claim 1 or 2, wherein each of the spokes forming the spoke portion extends from a connecting portion between the spoke and the first and second ring portions to a central portion of the spoke. A centering spider characterized by having a shape in which the cross-sectional area becomes smaller as it goes. 4. The center ring spider according to claim 1, claim 2 or claim 3, wherein:
The center ring spider, wherein the second ring portion and the spoke portion are formed by injection molding. 5. The centering spider according to claim 1, wherein the spoke has a rectangular cross-section. 6. The centering spider according to claim 1, wherein the spokes have an elliptical cross section. 7. The centering spider according to claim 1, wherein the spoke has a circular cross section. 8. A centering spider for holding a voice coil of a speaker in the center of a magnetic gap, wherein a substantially circular first ring portion adhered to a voice coil bobbin of the speaker and an outer shape larger than the first ring portion. And at least three spokes arranged between the first ring portion and the second ring portion, which are bonded to the speaker frame, and curved in the speaker vibration direction. A first spider portion having a first spoke portion, a substantially circular third ring portion adhered to a voice coil bobbin of the speaker, and an outer shape larger than the third ring portion, so that the speaker frame At least a fourth ring portion to be adhered and a spoke that is arranged between the third ring portion and the fourth ring portion and is curved in the vibration direction of the speaker is at least A second spider portion having two second spoke portions, and the first spider portion and the second spider portion have a first spoke portion and a second spoke portion, respectively. A centering spider, which is bonded so as to bend in opposite directions when viewed from the vibration direction. 9. The centering spider according to claim 8, wherein each of the first spider portion and the second spider portion is formed by thermoforming a synthetic resin plate and die-cutting into a predetermined shape. A centering spider characterized by that. 10. The centering spider according to claim 8, wherein the first spider portion and the second spider portion have the first spoke portion and the second spoke portion viewed from the vibration direction of the speaker. A centering spider characterized by being bonded so as to face each other. 11. The centering spider according to claim 8, wherein the first spoke portion and the second spoke portion of the first spider portion and the second spider portion are viewed from the vibration direction of the speaker. The centering spider is characterized in that it is adhered so as to be substantially parallel to each other. 12. A speaker comprising a voice coil, a voice coil bobbin, a cone diaphragm, a centering spider which holds the voice coil at the center of a magnetic gap, and a frame which supports these, wherein the centering spider comprises: A substantially circular first ring portion bonded to the voice coil bobbin, a second ring portion having a larger outer shape than the first ring portion and bonded to the frame, the first ring portion and the first ring portion. It is arranged between the two ring portions and faces each other when viewed from the vibration direction of the speaker, and
A pair of spokes curving in mutually opposite directions, and a spoke portion having at least three pairs of the pair of spokes. 13. A speaker comprising a voice coil, a voice coil bobbin, a cone diaphragm and an edge, a center ring spider that holds the voice coil at the center of a magnetic gap, and a frame that supports these, the center ring spider. Includes a substantially circular first ring portion bonded to the voice coil bobbin, a second ring portion having an outer shape larger than the first ring portion and bonded to the frame, and the first ring portion. A pair of spokes that are disposed between the second ring portion and the second ring portion, are substantially parallel to each other when viewed from the vibration direction of the speaker, and are curved in the opposite directions. A spoke having a spoke portion having the speaker. 14. A speaker comprising a voice coil, a voice coil bobbin, a cone diaphragm and an edge, a center ring spider that holds the voice coil at the center of a magnetic gap, and a frame that supports these centers. Is a substantially circular first ring portion that is bonded to the voice coil bobbin, a second ring portion that is larger in outer shape than the first ring portion, and that is bonded to the frame, and the first ring portion. And a second ring portion, a first spider portion having a first spoke portion having at least three spokes curved in the speaker vibration direction, and a substantially circular shape bonded to the voice coil bobbin. A third ring portion, and a fourth ring portion having an outer shape larger than that of the third ring portion and bonded to the frame, A second spider part having a second spoke part arranged between the third ring part and the fourth ring part and having at least three spokes curved in the vibration direction of the speaker; The first spider portion and the second spider portion are bonded so that the first spoke portion and the second spoke portion are curved so as to be curved in opposite directions when viewed from the vibration direction of the speaker. Characteristic speaker.