JP3011826B2 - Speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker, and more particularly to a loudspeaker in which magnets magnetized in the thickness direction are arranged so that the same poles are opposed to each other, and a magnet is provided in a magnetic field due to repulsive magnetic flux obtained near the outer periphery of the magnet. The present invention relates to a magnetic gapless speaker in which a voice coil is arranged.

[0002]

2. Description of the Related Art As shown in FIG.
A magnetic circuit including a yoke Y, a magnet M, and a top plate TP is provided, and a magnetic gap G formed between the outer periphery of the yoke Y and the top plate or the yoke pole portion YP and the inner periphery of the top plate TP is provided. The voice coil 1 is disposed in a cylindrical bobbin 1 on the inner peripheral portion of the voice coil.
The diaphragm 3 such as cone paper is driven via A.

A wiring structure for inputting a voice signal to the voice coil 1 includes a tinsel wire 2 and a coil wire lead-out portion 1.
It is well known to connect 1 and 12 by soldering or the like, and there are roughly three types of wiring forms. As a first example, as shown in FIG. 1, the coil wire lead-out portions 11 and 12 are cut from the winding start portion 13 and the winding end portion 14 of the coil wire by setting a predetermined length necessary for wiring, and the winding start portion is cut. 13
Then, the bobbin 1A is pulled out from the winding end portion 14 toward the upper side of the bobbin outer peripheral portion and crawls along the surface of the bobbin outer peripheral portion to the vicinity of the upper end portion of the bobbin 1A. It is fixed to the outer peripheral portion, and the tip protruding from the reinforcing paper 1B is subjected to terminal treatment, that is, the insulating film is peeled off and solder coating is applied.

When the voice coil 1 is incorporated in a speaker, the end of the coil wire is laid on the surface of the diaphragm 3 as shown in the figure, and a hole 31 or an eyelet is provided at a predetermined position of the diaphragm. The tinsel wire 2 is passed through the hole 31 and the like, and the tinsel wire tip 21 and the above-mentioned solder coat part of the coil wire lead-out portion are connected and wired by soldering or the like, and the connecting portion and the creeping portion are made of an adhesive A or the like. And the other end 22 of the tinsel wire 2 is connected to the input terminal lug 4.

As a second example, in the configuration shown in FIG. 2, first, as in the first example, the coil wire lead-out portions 11 and 12 are wound upward from the winding start portion 13 and the winding end portion 14 toward the outer periphery of the bobbin 1A. The bobbin 1A is pulled out and crawled along the surface of the outer periphery of the bobbin 1A to the vicinity of an intermediate portion of the bobbin 1A. The crawled portion is covered with reinforcing paper 1B or the like and fixed to the outer periphery of the bobbin 1A. The end portions of the drawers 11 and 12 protruding from the covered part are subjected to terminal treatment, and the drawer 1
1 and 12 are arranged at predetermined positions on the outer peripheral portion of the bobbin, and one end 21 of the tinsel wire 2 cut to a predetermined length at the arrangement position is connected and wired. When the voice coil is assembled into the speaker, the other end 22 of the tinsel wire 2 is connected to the input terminal lug 4.

A third example is a wiring structure for a speaker proposed earlier by us. As shown in FIG. 3, a conductive portion 1 made of copper foil or the like is provided on an outer peripheral portion of a voice coil bobbin 1A.
C, the coil wire winding start portion 13 and the winding end portion 14, or the coil wire drawing portions 11, 12 and the like are connected and wired by soldering or the like, and further along the corrugation portion 51 of the damper 5. When the voice coil 1 and the damper 5 are sewn to the speaker, the end 2H1 of the flat knitted tinsel wire reaching the damper inner peripheral portion 52 and the bobbin 1A are sewn together with the flat knitted tinsel wire 2H as a conductive member. Is connected to the conductive portion 1C provided on the outer periphery of the wire, the tinsel wire end 2H2 extending to the tongue piece 53 on the outer periphery of the damper and the input terminal lug 4 are connected.
Are connected and wired.

On the other hand, as a speaker structure, a magnet magnetized in the thickness direction is arranged so that the same poles face each other, and a voice coil is arranged in a magnetic field due to repulsive magnetic flux obtained near the outer periphery of the magnet. Magnetic gapless speakers have been proposed in the past, and we also
The speaker as shown in the above was proposed earlier. The speaker shown in FIG. 4 has magnets M1, M magnetized in the thickness direction.
2 are arranged so that the same pole side faces each other, and the center plate SP is sandwiched between the facing surfaces to converge the repulsive magnetism on the center plate SP, and convert the magnetism to a magnetic flux outward from the outer periphery of the center plate SP. This is a speaker of a type in which the voice coil 1 is emitted and the voice coil 1 is arranged in the magnetic field. Therefore, the speaker does not have the magnetic gap G as shown in FIGS.
In this type of speaker, the neck portion 32 of the cone diaphragm 3 and the suspension, for example, the inner diameter portion 52 of the damper 5, can be directly joined to the outer peripheral portion of the voice coil 1, and can be referred to as a direct drive type speaker.

[0008]

However, in the direct drive type speaker as described above, it is difficult to connect the coil wire lead-out portion of the voice coil 1 and the tinsel wire 2 with the conventional wiring connection structure as described above. there were. That is, FIGS.
The conventional general voice coil 1 shown in FIG.
A bobbin 1A made of a strip having a diameter of 0.05 to 0.2 mm is curled, the bobbin 1A is placed on a jig having a fixed diameter, and a coil wire is wound around the bobbin 1A. However, the direct drive type speaker has a voice coil 1
By directly attaching the neck portion 32 of the cone diaphragm 3 to the outer peripheral portion, the coil bobbin 1A becomes unnecessary, or even if the bobbin 1A is used, it is sufficient to have a minimum width for winding the voice coil 1. It has the characteristic of.

This feature has the advantage that the transmission path can be shortened and the weight of the voice coil 1 can be reduced, and the performance can be improved. It also has functions. For example,
Coil wire drawing part 1 for coil wire routing etc.
1 and 12 can be fixed to the outer peripheral portion of the bobbin, and the wire material is peeled (separated) at the winding start 13 and the winding end 14 during the production and transportation of the voice coil.
And so on.

Therefore, if the conventional voice coil structure is employed as it is, if the bobbin-less structure in which the bobbin material 1A is omitted is adopted, the quality of the voice coil 1 is reduced due to the large variation of the voice coil 1, and the bobbin 1A is used. In the case of the structure, the bobbin material 1A must be used for at least the fixed area of the coil wire drawing parts 11 and 12,
The above advantages are halved.

Therefore, an object of the present invention is to make it possible to improve the performance of a direct drive type speaker, to ensure the same quality of the voice coil 1 as the conventional one, and to wire the tinsel wire 2 and the voice coil 1. It is an object of the present invention to provide a loudspeaker which can be easily connected and can be connected by wiring with at least the same man-hour as a conventional one.

[0012]

Means for Solving the Problems In order to achieve the above object, a first invention of the present invention is to arrange magnets magnetized in the thickness direction such that the same poles are opposed to each other, and at the same time, in the vicinity of the outer peripheral portion of the magnet. the magnetic gapless loudspeaker formed by arranging the voice coil in the magnetic field due to the repulsive magnetic flux obtained, the inner peripheral portion of the coil portion of the voice coil
Reinforcement paper , bobbin material or copper foil that has a bobbin- less structure in which no bobbin is arranged and covers at least a part of the outer peripheral portion of the coil portion
Is attached to the outer peripheral portion, and outside the reinforcing paper bobbin material or copper foil.
A support member for supporting the voice coil is fixed to the periphery . In this case, the bobbin material can be injection-molded with a heat-resistant resin or the like, and the voice coil can be insert-molded into the bobbin material. The second invention is a magnetic gapless speaker as described above, wherein a voice coil
A bobbin-less structure without a bobbin on the inner circumference of the coil
When the coil wire lead-out part of the voice coil wound by the coil wire is crawled along the outer periphery of the coil part and covered with reinforcing paper, it is fixed to the outer periphery of the coil part.
A support member for supporting the voice coil on the outer periphery of the reinforcing paper
Is fixed . In this case, a conductive portion made of copper foil or the like is provided on the bobbin material or the reinforcing paper, and a coil wire lead-out portion of the voice coil and an input tinsel wire are connected to the conductive portion. According to a third aspect of the present invention, in the above-mentioned magnetic gapless speaker, at least one pair of conductive portions made of copper foil or the like are mounted on a part of the outer peripheral portion of the coil portion of the voice coil. The wiring section is connected to a coil wire lead-out section of the voice coil and a tinsel wire. Also, the fourth
According to the invention of the above, in the speaker having no magnetic gap as described above, a coil coil is provided from a lower end of a coil portion of a voice coil.
A conductive part made of copper foil etc. is installed at the bottom of the bottle to the bottom.
In addition to this, the coil wire extraction part of the above voice coil and kinshi
Connect the wires.

[0013]

[Action] When incorporating the <br/> voice coil bobbin-less speaker magnetic gapless, coil outer periphery portion of the wearing reinforcing paper or bobbin material such as at least a portion of the voice coil, diaphragm or to the bobbin material It is bonded to the support member to be supported suspension other voice coil
You. Also, the voice coil can be insert-molded into the bobbin material by injection molding the bobbin material with a heat-resistant resin or the like. As the wiring structure of the voice coil, the coil wire lead-out portion of the voice coil is laid along the outer peripheral portion of the coil portion, and this is covered with reinforcing paper such as reinforcing paper to be fixed to the outer periphery of the coil portion, or the bobbin material is used. Alternatively, a conductive portion made of copper foil or the like is provided on the reinforcing paper, and a coil wire lead-out portion of the voice coil and a tinsel wire for input are connected to the conductive portion.
Instead of the bobbin material or the holding member of the reinforcing paper, a conductive portion made of at least one pair of strip-shaped copper foil or the like is directly mounted on a part of the outer peripheral portion of the coil portion of the voice coil, and the conductive portion is attached to the conductive portion. It is also possible to connect and connect a coil wire lead-out portion of the voice coil and a tinsel wire. Alternatively, a tinsel wire may be connected and wired to the coil wire draw-out portion, and the connection portion may be fixed to the outer peripheral portion of the coil portion with an adhesive or the like.Also, the lower end portion of the coil portion of the voice coil may be connected to the lower end portion of the coil bobbin. A conductive portion made of copper foil or the like is provided at the bottom of the bottom, and a coil wire lead-out portion of the voice coil and a tinsel wire are connected to the conductive portion. By adopting the voice coil structure as described above, the man-hours for manufacturing the voice coil can be substantially the same as the conventional one, and the quality of the voice coil similar to the conventional one can be maintained. Also, the wiring work between the tinsel wire and the coil wire lead wire of the voice coil can be performed with the same man-hour as in the prior art. Therefore, assembling and wiring of a magnetic gapless speaker become easy, and the high performance thereof is easily maintained. be able to.

[0014]

1 to 5 show an embodiment of a speaker according to the present invention.
9 will be described. As a first example, FIG. 5 shows an aluminum wire 15 having a conductor diameter of 0.19 and a magnetic material 16A such as an iron material as a core material, and a conductive material 1 such as copper around the core material.
A wire 16 (hereinafter referred to as an iron core wire) formed by melting and adhering 6B is wound simultaneously in parallel, and has a DC resistance of about 5.4Ω.
And the voice coil 1 having an inner diameter of 35.5 mm was obtained. For details of the iron core wire 16, see the wire 16A made of iron material.
Is arranged at the center, the resistance value naturally increases and the electrical conductivity decreases. However, when the electrical conductivity of the wire made of copper alone is 100%, the electrical conductivity of the iron core wire 16 is about 60%.
The wire 16 is drawn to a conductor diameter of 0.19 mm, and the surface is further subjected to insulation. The voice coil 1 employs a bobbinless structure for the purpose of reducing the weight of the voice coil, and includes a winding start portion 13 and a winding end portion 1.
In order to prevent the dispersion of No. 4, the vicinity of the winding end portion 14 is wound on the third layer for about two turns. The configuration related to the prevention of variation is omitted in the following drawings for convenience of description.

The coil section of the voice coil 1 (FIG. 6 and others)
As shown in the figure, the part where the coil is wound
6 ) (about 11 mm in width, 50 mm in length , and 0.05 mm in thickness in the case of this embodiment)
Kraft paper), width 9 mm, length 11 mm, thickness 0.
A pair of 01 mm copper foils IC1 and IC2 are attached as shown in the figure, and a copper foil IC3 having a width of 4 mm and a length of 11 mm is attached on the center line of the kraft paper as shown in the figure. After the reinforcing paper 1B made of kraft paper on which the conductive part IC is disposed is attached to the outer periphery of the coil as shown in the figure, and the insulating layers of the coil wire winding start end 13 and the winding end end 14 are peeled off. The winding start end 13A of the aluminum wire 15 is connected to the copper foil IC1 and the winding start end 13B of the iron core wire 16 is connected to the copper foil IC.
3 and the end 14A of the winding end of the aluminum wire is
C3, the winding end 14B of the iron core wire is connected to the copper foil IC2.
Is connected and wired by soldering.

In the case of this embodiment, the copper foil 1C3 was provided as described above and the copper foil was used for the relay because of the series wiring based on the impedance specification of the coil. Two places may be used as shown in FIG. Further, in the case of the present embodiment, the copper foil 1C is adhered to the surface of the kraft paper for work reasons, but the method of attaching the copper foil 1C may be changed according to the purpose of specification. For example, when the insulation strength is not so required, as shown in FIG. 8, since the voice coil coil 1 itself has an insulating coating, a copper foil may be directly adhered, or one side of the copper foil may be attached. An insulating coating such as phenol may be provided, and the insulating coating may be attached to the outer periphery of the coil 1. In order to increase the insulation strength, the reinforcing paper 1B may be made of a material having a high insulation strength, such as an insulating film.

If the strength of the voice coil 1 is important without being limited by the weight of the voice coil 1, as shown in FIG. 9, the bobbin material 1 is made of a heat-resistant resin by injection molding or the like.
A1 is prepared, and the bobbin material 1A1 is adhered to the outer peripheral portion of the coil portion, or the bobbin material 1A1 is attached to the bobbin material 1A1 by insert molding or the like.
A conductive portion 1C such as the above-mentioned copper foil may be attached to the outer peripheral portion of A1. In this case, an arrangement portion 1A2 for disposing the diaphragm 3 on the outer peripheral side of the bobbin material 1A1 can be formed, and an arrangement portion 1A3 for disposing the damper 5 and the like can also be formed. it can. The bobbin material 1
As shown in FIG. 10, a notch 1A3 may be formed in the upper portion of the bobbin material 1A1 corresponding to the copper foil, as a connecting means for connecting the coil wire, the conductive portion 1C and the coil wire when using A1. Therefore, it is possible to guide the end of the coil wire to the conductive portion 1C from the cutout portion 1A3. Although not shown, a hole or the like is formed in the bobbin material 1 instead of the notch 1A3.
A1 may be formed, and if further strength is required, the bobbin 1A may be provided on the inner peripheral side in the same manner as in the related art.

The above-described voice coil 1 is set in a magnetic circuit. The magnetic circuit according to the embodiment of the present invention has a structure shown in FIG.
This is the configuration shown in FIG. That is, the magnet M used in this embodiment
1, M2 is a neodymium magnet with an outer diameter of 34
mm, an inner diameter of 12 mm and a thickness of 9 mm
The magnets M1 and M2 are magnetized in the thickness direction. An aluminum holder H as shown in FIG. 11 was prepared to support the magnets M1 and M2 and the center plate SP. At the center of the bottom of the holder H, there is provided a cylindrical center guide H1 which is directed upward from the bottom, and a magnet M1,
A step portion H2 having a function of positioning the M2 and the center plate SP in the height direction is provided.

After applying an acrylic adhesive to the step portion H2, the magnet inner diameter portion M21 is moved to the center guide portion H so that the N pole of the magnet M2 faces upward in the drawing.
Insert into 1. Since the outer diameter φ of the center guide portion H1 of the holder H is processed to φ11.95 mm, it can be easily inserted. After applying an adhesive to the upper surface of the inserted magnet M2, the outer diameter is 34.80 mm and the inner diameter is 11.9.
An inner diameter portion SP1 of an iron center plate SP having a ring shape of 5 mm and a thickness of 6 mm and an inner diameter and a ridge of the inner diameter subjected to chamfering of C0.4 is pressed into the center guide portion H1. In the case of the present embodiment, the diameter of the center plate SP is set. However, the diameter of the center plate SP is naturally adjusted in consideration of the conversion efficiency and the cogging phenomenon at the time of coil vibration. .

Push down to the position where the lower surface of the center plate SP is in close contact with the N pole side of the inserted magnet M2, apply an adhesive to the upper surface of the press-fitted center plate SP, and turn the N pole of the magnet M1 downward. Then, the magnet inner diameter portion M11 is inserted into the center guide portion H1, and is pushed to a position where the magnet inner diameter portion M11 comes into close contact with the upper surface of the center plate SP.
In this state, the magnets M1 and M2 have the same polarity, that is, the N poles face each other, and furthermore, the center plate outer peripheral portion SP2 is
1 and M2 are installed so as to protrude outward by about 0.4 mm from outer peripheral portions M12 and M22.

To mount the magnetic circuit on the frame F, the holder H is mounted on the frame F.
Has a flange portion H with a width of about 2 mm and a thickness of 2.5 mm on the outside.
3 are provided, and four attachment portions H4 are formed in the flange portion H3 at 90 ° distribution. Further, the mounting portion H
4 are each subjected to tapping with a diameter of 4 mm to form a tap portion H5. After applying a rubber-based adhesive to the flange portion H3, the bottom portion of the frame F is attached. A mounting hole having a diameter of 4.5 mm is provided in the bottom portion of the frame F at a position corresponding to the tap portion H5 as shown in the figure. 4mm
The magnetic circuit and the frame F are fixed with the screws 6.

As shown in the figure, a damper 5 is installed on the voice coil 1 installed in the magnetic circuit. The damper 5 is formed by impregnating a thermosetting resin such as phenol in a cotton cloth or the like and subjecting the same to thermoforming. It is a general one molded from. This damper 5 is provided with a conductive portion by a method that has been separately proposed previously. In other words, two flat yarns 2H (hereinafter, referred to as flat knitting yarns) are sewn in parallel with the center line and mounted along the corrugations 51. The interval between the tinsel wires 2H corresponds to the interval between the conductive portions 1C provided on the outer peripheral portion of the voice coil 1.

As shown in FIG. 7, when the damper inner peripheral portion 52 is inserted into the outer peripheral portion of the voice coil 1, a flat portion extending over the conductive portion 1C provided on the outer peripheral portion of the voice coil 1 and the damper inner peripheral portion 52 is provided. Adjust the position of the end 2H1 of the knitting kinshi wire and set the damper 5
Is placed at a predetermined position, the flat knitted tinsel wire end 2H1 extending to the inner peripheral portion 52 of the damper and the conductive portion 1C are connected and wired on the outer peripheral portion of the voice coil 1 by soldering. After the adhesive is applied to the contact portion between the outer peripheral portion and the inner peripheral portion 2 of the damper, the neck portion 32 of the cone diaphragm 3 is inserted and the adhesive is applied to the neck portion 32, and the diaphragm 3, the voice coil 1 and the damper are applied. 5 and the soldering portion is covered with the adhesive. As a result, the speaker was completed as a practically sufficient speaker.

As a second example, as shown in FIG. 12, a voice coil 1 was formed by winding only an aluminum wire having a conductor diameter of 0.19 and setting a DC resistance to about 5.4Ω. The coil wire was drawn out from the winding start portion 13 and the winding end portion 14 as shown in FIG. 13, crawling upward along the outer periphery of the coil, and the crawling portion was covered with reinforcing paper 1B and fixed. The distal end protruding from the reinforcing paper 1B is subjected to terminal treatment such as peeling of an insulating coating and solder coating as in the conventional case. The magnetic circuit and other components are the same as in the first example.

When the voice coil 1 having this structure is used, the wiring can be made substantially the same as that of the first conventional example shown in FIG. That is, as shown in FIG. 13, the damper inner peripheral portion 52 is inserted into the outer peripheral portion of the coil, the adhesive is applied to the outer peripheral portion of the voice coil 1 and the inner peripheral portion 52 of the voice coil 1, and then the diaphragm 3 and the voice coil 1 are assembled. At this point, a hole 31 or an eyelet or the like is provided at a predetermined position of the cone paper 1, and the hole 31 or the eyelet or the like and the coil wire lead-out portions 13 and 14 arranged on the outer peripheral portion of the voice coil are combined to form a cone paper neck portion 32. Is inserted into the outer peripheral portion of the voice coil 1, and the coil wire ends 11, 12 arranged on the outer peripheral portion of the coil 1 are made to crawl on the surface of the diaphragm 3 from the cone paper neck portion 32 to the hole 31 or the eyelet.

Further, the wire 2 is inserted into the hole 31 or the eyelet.
Through one end 21 of the tinsel wire 2 and the ends 11, 12 of the coil wire 1 on which solder coating has been performed by soldering or the like. Is applied, and the diaphragm 3 and the voice coil 1 are adhered to each other. Then, the connecting portion and the crawling portion are applied so as to be covered with the adhesive A, and the connecting portion and the coil wire ends 11, 12 are crawled. Is fixed to the surface of the vibration plate 3 and the connection portion, the crawling portion and the like are coated. After connecting the other end 22 of the tinsel wire 2 to the input terminal lug 4, the tinsel wire can be formed into an appropriate shape to complete a practically sufficient speaker.

As a third example, as shown in FIG.
In the same manner as in the first example, an aluminum wire and an iron core wire were wound at the same time in parallel, and the DC resistance was set to about 5.4Ω to form the voice coil 1.
Only a 0.19-diameter aluminum wire as shown in FIG. 12 is wound, a DC resistance is set to about 5.4Ω to form a voice coil, and a conductive part 1C as shown in FIG. One end 21 of the wire may be wired. FIG.
Voice coil 1 not using conductive portion 1C as shown in FIG.
It is also possible to use That is, the draw-out of the coil wire from the winding start portion 13 and the winding end portion 14 is made to crawl toward the upper part of the outer periphery of the coil, and the crawling portion is covered and fixed with the reinforcing paper 1B, and extends beyond the reinforcing paper 1B. The tinsel wire 2 is wired at the leading end, and the wiring portion is directly fixed with the adhesive A. The magnetic circuit and other components are the same as in the first example. Further, in the case of this embodiment, the drawer is covered and fixed with the reinforcing paper 1B, but the drawer may be fixed with an adhesive.

In the case of this embodiment, as shown in FIG.
Insert the inner peripheral portion 52 of the damper into the outer peripheral portion, and
After the adhesive A is applied to the outer peripheral portion and the inner peripheral portion 52 of the damper, the process shifts to the assembly of the diaphragm 3 and the voice coil 1. The cone paper neck portion 32 is inserted into the voice coil outer peripheral portion by aligning the predetermined position of the hole 31, etc., with the position of the tinsel wire 2 arranged on the voice coil outer peripheral portion.
The tinsel wire 2 is made to crawl on the surface of the diaphragm 3 from to the hole 31.

Further, the end 22 of the tinsel wire is passed through the hole 31 to the back side of the diaphragm 3, and the tip 22 of the tinsel wire is connected to the input terminal lug 4.
Then, the tinsel wire 2 is formed into an appropriate shape. Further, after the adhesive A is applied to the neck portion 32 and the diaphragm 3 and the voice coil 1 are bonded, the crawling portion and the like are applied so as to be covered with the adhesive A, and the crawling portion and the like are applied to the surface of the diaphragm 3. It is fixed, and the crawling part is coated to complete a practically sufficient speaker.

In the present embodiment, the tinsel wire 2 has the above arrangement and wiring structure. However, when the winding width of the voice coil 1 is large, as shown in FIG. A configuration is also possible near the middle point between the back surface of the damper and the surface of the damper inner peripheral portion 52. In this case, wiring similar to that of the conventional example shown in FIG. 2 is possible.

As a fourth embodiment, as shown in FIG. 17, a bobbin 1A is provided on the inner peripheral portion of the coil 1 in accordance with the specifications of the voice coil 1 or the characteristics of the speaker. From the lower end of the coil winding portion to the lower end of the voice coil bobbin 1A, that is, the so-called bobbin 1A
A conductive portion made of the conductive portion 1C or the like can be provided in a portion called a skirt of the conductive member. In this case, similarly to the above-described embodiment, as shown in FIG.
To connect the flat knitted tinsel wire 2H extending to the inner circumference of the wire. Further, as shown in FIG.
A configuration may be adopted in which an input tinsel wire 2 is connected to C. The configuration of the speaker according to the present embodiment does not have a magnetic gap as described above. Therefore,
As shown in FIG. 19, a hole H6 is provided on the bottom surface of the holder H, and the end 21 of the tinsel wire 2 can be inserted into the hole and connected to the input terminal lug 4. In this case, the expensive damper 5 in which the conductive portion 2H is formed is used.
Not only does not need to be used, so that the cost can be reduced, and further, it is not necessary to route the voice coil wire on the upper surface side of the diaphragm 3 and adhere it to the upper surface side of the diaphragm 3. Since the manufacturing process can be saved, the manufacturing cost can be reduced.

[0032]

According to the present invention, a bobbin-less voice is used.
Attach reinforcing paper or bobbin material to the outer periphery of the coil part of the coil.
The bobbin-less coil
Can be placed, and the coil
It does not occur. In addition, voice coil
The support member that supports the
It is also used for joining with the holding member and the thickness of the supporting member is
The voice coil can be flattened
Can be The configuration and to fix this by crawl the coil wire lead-out portion to the coil portion outer peripheral portion by the reinforcing sheet or the like, by a conductive portion made of copper foil or the like to the voice coil structure affixed to the coil outer periphery portion, the coil Line drawer section
The debris can be reliably prevented. Furthermore, the width of the outer periphery of the coil
The support member can be joined in the interior, further flattening
In addition, the amount of the coil bobbin material can be greatly reduced , and the assembly of the magnetic gapless speaker becomes easy and the performance can be improved.

Also, the voice coil can maintain the same quality as that of the conventional one, and the wiring work can be performed extremely easily without the connection wiring exceeding the conventional wiring man-hour. Moreover, reinforced paper used in conventional voice coils, such as kraft paper or resin film, is provided on the outer periphery of the coil.
By attaching paper, bobbin material, etc. , reinforcement of the voice coil becomes easy. Therefore, the resonance of the coil can be set to a substantially arbitrary frequency, so that the performance and the sound quality can be improved.

Generally, when the upper end and lower end of the voice coil are supported by a suspension, the rolling phenomenon of the voice coil can be effectively prevented. Therefore, a conductive portion is provided at the bottom of the lower end of the bobbin as in the present invention. If an input tint wire is connected to this, the tint wire can support the vicinity of the substantially lower end of the voice coil, and if the neck portion of the cone diaphragm is joined to the upper end portion of the voice coil, Since the voice coil is supported at the upper and lower ends, the rolling phenomenon of the voice coil can be effectively suppressed,
In addition, the speaker structure has a very simple wiring.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first conventional speaker configuration.

FIG. 2 is a sectional view showing a configuration of a speaker according to a second conventional example.

FIG. 3 is a cross-sectional view and a partially enlarged perspective view showing a speaker configuration of a third conventional example.

FIG. 4 is a sectional view showing an example of the overall configuration of a magnetic gapless speaker.

FIG. 5 is a sectional view showing a voice coil configuration used in the first embodiment of the speaker according to the present invention.

FIG. 6 is a sectional view showing the overall configuration of the first embodiment.

FIG. 7 is a perspective view of a main part showing another configuration example in the first embodiment.

FIG. 8 is a perspective view showing another configuration example of the voice coil in the first embodiment.

FIG. 9 is a sectional view showing still another configuration example of the voice coil in the first embodiment.

10 is a perspective view showing the configuration of FIG. 9 with a part removed.

FIG. 11 is an assembly diagram of a magnetic circuit used in the first embodiment.

FIG. 12 is a sectional view showing a voice coil configuration used in a second embodiment of the speaker according to the present invention.

FIG. 13 is a sectional view showing the entire configuration of the second embodiment.

FIG. 14 is a sectional view showing the overall configuration of a third embodiment of the speaker according to the present invention.

FIG. 15 is a perspective view showing another configuration example of the voice coil used in the third embodiment.

FIG. 16 is a sectional view showing another configuration example of the third embodiment.

FIG. 17 is a sectional view showing an overall configuration of a fourth embodiment of the speaker according to the present invention.

18 is a perspective view of a main part in the embodiment of FIG.

FIG. 19 is a sectional view showing another configuration example of the fourth embodiment.

[Explanation of symbols]

 Reference Signs List 1 voice coil 1A1 bobbin material 1B reinforcing paper 1C conductive part 2 tinsel wire

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-98400 (JP, A) JP-A-3-208497 (JP, A) Japanese Utility Model 1986-128896 (JP, U) Japanese Utility Model 1983 147397 (JP, U) Practical application A microfilm photographing the contents of the specification and drawings attached to the application form of Japanese Patent Application No. Sho 63-29824 (Japanese Utility Model Application No. 1-133899). Microfilm (JP, U) photographing the specifications and drawings attached to the application form (Japanese Utility Model Application No. 2-5998). Microfilm photographing the contents of the attached specification and drawings (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04R 9/04 104 H04R 9/04 103

Claims (6)

(57) [Claims] 1. A magnet (M) magnetized in the thickness direction.
1, M2) are arranged so that the same poles are opposed to each other, and the voice coil (1) is arranged in a magnetic gapless loudspeaker in which the voice coil (1) is arranged in a magnetic field due to repulsive magnetic flux obtained near the outer peripheral portion of the magnet. And the bobbin-less structure without the bobbin on the inner periphery of the coil
Then, reinforcing paper (1B) , bobbin material (1A1), or copper foil covering at least a part of the outer peripheral portion of the coil portion is attached to the outer peripheral portion, and reinforcing paper (1B), bobbin material (1A1) are attached. Or copper foil
A support member for supporting the voice coil (1) is fixed to the outer periphery of the
Speaker, characterized in that the constant was. 2. A magnet (M) magnetized in the thickness direction.
1, M2) are arranged such that the same pole side faces each other and
Magnetic field due to repulsive magnetic flux obtained near the outer periphery of the magnet
Gap gap with voice coil (1) arranged inside
Of the voice coil (1)
Bobbin-less structure without bobbins on the inner periphery of the
Of the voice coil (1) wound by the coil wire
Crawling the coil wire drawing part along the outer periphery of the coil part
By covering this with reinforcing paper (1B),
At the same time, fix the voice coil around the outer periphery of the reinforcing paper (1B).
Wherein the supporting member for supporting the tool (1) is fixed.
Speaker that. 3. A magnet (M) magnetized in the thickness direction.
1, M2) are arranged such that the same pole side faces each other and
Magnetic field due to repulsive magnetic flux obtained near the outer periphery of the magnet
Gap gap with voice coil (1) arranged inside
Of the voice coil (1)
At least one pair of strips
Attach a conductive part (IC) made of copper foil, etc.
Connect and arrange the coil wire extraction parts (11, 12) of the chair coil.
A speaker characterized by a line . 4. A tinsel wire (2) for inputting to a conductive part (IC).
The speaker according to claim 3, wherein is connected and wired . 5. A brochure for the coil wire drawing portions (11) and (12).
Connect and wire the thread wire (2), and connect the connecting portion to the outer peripheral portion of the coil portion.
The speaker according to claim 1 , wherein the speaker is fixed with an adhesive or the like . 6. A magnet (M) magnetized in the thickness direction.
1, M2) are arranged so that the same poles are opposed to each other, and the voice coil (1) is arranged in a magnetic gapless loudspeaker in which the voice coil (1) is arranged in a magnetic field due to repulsive magnetic flux obtained near the outer peripheral portion of the magnet. ) Coil section
Copper foil on the hem from the bottom of the coil bobbin to the bottom
And a conductive portion (IC) made of the same.
A speaker to which a kinshi wire (2) is connected .