JPH0715796A - Speaker - Google Patents

Abstract

PURPOSE:To obtain a speaker in which high performance for a magnetic gapless speaker can be attained and the quality of a voice coil is secured and wiring between a tinsel wire and the voice coil can be facilitated. CONSTITUTION:In the magnetic gapless speaker formed by arranging magnets M1, M2 magnetized in a thickness direction in a manner that the same pole sides confront with each other, and also, arranging the voice coil 1 in a magnetic field by repulsive magnetic flux obtained in the vicinity of the outer peripheral part of the pertinent magnets M1, M2, reinforcing paper 1B or bobbin material 1A1 is mounted on at least a part of the outer peripheral part of a coil part in the voice coil 1, and a conductive part 1C is provided with it, and wiring is made by connecting with a coil wire draw-out part and a tinsel wire 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker, and in particular, magnets magnetized in the thickness direction are arranged so that the same poles face each other, and a magnet is provided in the magnetic field due to repulsive magnetic flux 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 A conventional speaker, 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 is formed between the yoke Y and the outer periphery of the top plate or the yoke pole portion YP and the inner periphery of the top plate TP. The voice coil 1 is arranged on the cylindrical bobbin 1 on the inner periphery of the voice coil.
The diaphragm 3 such as cone paper is driven via A.

As a wiring structure for inputting a voice signal to the voice coil 1, a tinsel wire 2 and a coil wire lead-out portion 1 are used.
It is well known that 1 and 12 are connected by soldering or the like, and there are 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 a winding start portion 13 and a winding end portion 14 of the coil wire with a fixed length required for wiring, and the winding start portion is cut. Thirteen
And, the bobbin 1A is pulled out from the winding end portion 14 toward the upper part of the bobbin outer peripheral part and crawls along the surface of the bobbin outer peripheral part to the vicinity of the upper end of the bobbin 1A, and the crawl part is covered with a reinforcing paper 1B or the like. The tip portion protruding from the reinforcing paper 1B is fixed to the outer peripheral portion, and the tip end portion 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 drawing, 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 or the like, and the tinsel wire distal end portion 21 and the above-mentioned solder coat portion of the coil wire lead-out portion are connected and wired by soldering or the like, and the connecting portion and the crawling portion or the like are adhesive A or the like. And the other end 22 of the tinsel wire 2 is connected and wired to the input terminal lug 4.

As a second example, in the configuration shown in FIG. 2, first, similarly to the first example, the coil wire drawing portions 11 and 12 are directed from the winding start portion 13 and the winding end portion 14 toward the upper side of the outer peripheral portion of the bobbin 1A. Draw it out and crawl along the surface of the outer peripheral portion of the bobbin 1A to the vicinity of the middle portion of the bobbin 1A, cover the crawl portion with a reinforcing paper 1B or the like, and fix it to the outer peripheral portion of the bobbin 1A. The leading end portions of the withdrawal portions 11 and 12 protruding from the covered portion are subjected to terminal treatment, and the withdrawal portion 1
1 and 12 are arranged at a predetermined position on the outer circumference of the bobbin, and one end 21 of the tinsel wire 2 cut to a predetermined length is connected and wired at the position where the connection is made to an adhesive A or the like. When the voice coil is assembled into the speaker, the other end 22 of the tinsel wire 2 is connected and wired to the input terminal lug 4.

As a third example, there is a speaker wiring structure that we have previously proposed. As shown in FIG. 3, the conductive portion 1 made of copper foil or the like is provided on the outer peripheral portion of the voice coil bobbin 1A.
C is provided, and the coil wire winding start portion 13 and winding end portion 14, or the coil wire lead-out 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 flat knitted tinsel wire 2H, which is a conductive member, is sewn and the voice coil 1 and the damper 5 are incorporated into the speaker, the end 2H1 of the flat knitted tinsel wire extending to the damper inner peripheral portion 52 and the bobbin 1A. The conductive portion 1C provided on the outer peripheral portion of the wire is connected and wired, and the tinsel wire end portion 2H2 extending to the tongue portion 53 on the outer peripheral portion of the damper and the input terminal lug 4 are connected.
It is configured so that and are connected and wired.

On the other hand, as a speaker structure, magnets magnetized in the thickness direction are arranged so that the same poles face each other, and a voice coil is arranged in the magnetic field due to repulsive magnetic flux obtained near the outer peripheral portion of the magnet. Magnetic gapless speakers have been proposed in the past, and we have
We have previously proposed a speaker as shown in. The speaker shown in FIG. 4 has magnets M1 and M magnetized in the thickness direction.
2 are arranged so that the same poles face each other, and the center plate SP is sandwiched between the facing surfaces to converge the repulsive magnetism to the center plate SP, and to make the magnetism a magnetic flux from the outer peripheral portion of the center plate SP to the outside. It 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 thereof, and thus is a speaker without a 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 drawing portion of the voice coil 1 and the tinsel wire 2 with the conventional wiring connection structure as described above. there were. That is, FIG.
The conventional general voice coil 1 shown in FIG.
The bobbin 1A material having a strip shape of 05 to 0.2 mm is curled, the bobbin 1A material is set on a jig having a fixed diameter, and the coil wire is wound around the bobbin 1A material. 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, the minimum width for winding the voice coil 1 is sufficient. Will have the characteristics of.

This feature has the advantage that mainly the transmission path can be shortened and the voice coil 1 can be made lighter in weight, and the performance can be improved. However, the bobbin 1A is not limited to the vibration transmission of the voice coil 1. It also has a function. For example,
Coil wire lead-out part 1 for routing the coil wire, etc.
1 and 12 can be fixed to the outer peripheral portion of the bobbin, and the wire material is peeled off at the winding start 13 and winding end portion 14 of the coil wire during voice coil manufacturing work, transportation, etc.
Etc. are prevented.

Therefore, if the conventional voice coil structure is adopted as it is, when the bobbin-less structure in which the bobbin member 1A is omitted is adopted, the voice coil 1 is largely dislocated and the quality is deteriorated, and the bobbin 1A is used. In the case of the structure, since the bobbin material 1A must be used at least for the fixed area of the coil wire drawing portions 11 and 12,
The above advantages are halved.

Therefore, an object of the present invention is to enable high performance of a direct drive type speaker, to ensure the quality of the voice coil 1 similar to 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 speaker that can be easily connected and can be connected to wiring by at least the same number of steps as in the related art.

[0012]

In order to achieve the above object, the first invention of the present invention is to arrange magnets magnetized in the thickness direction so that the same poles face each other and to have the magnets in the vicinity of the outer peripheral portion thereof. In a magnetic gapless speaker in which a voice coil is placed in a magnetic field due to the repulsive magnetic flux obtained in (1), reinforcing paper or bobbin material is attached to at least a part of the outer peripheral portion of the coil portion of the voice coil. In this case, the voice coil can be made bobbinless, and the bobbin material can be injection-molded with heat-resistant resin or the like to insert-mold the voice coil into the bobbin material. According to a second aspect of the present invention, in the magnetic gapless speaker as described above, the coil wire lead-out portion of the voice coil wound by the coil wire is laid along the outer peripheral portion of the coil portion and covered with a reinforcing paper. It is fixed to the outer circumference of the coil portion. In this case, a conductive portion made of copper foil or the like is provided on the bobbin material or the reinforcing paper, and the coil wire lead-out portion of the voice coil and the tinsel wire for input are connected and wired to this conductive portion. According to a third aspect of the present invention, in the magnetic gapless speaker as described above, at least one pair of conductive portions made of strip-shaped copper foil or the like is attached to a part of the outer peripheral portion of the coil portion of the voice coil, and the conductive portion is provided. The coil wire lead-out portion of the voice coil and the tinsel wire are connected to the portion. Fourth
According to the invention of the above, in the magnetic gapless speaker as described above, the tinsel wire is connected and wired to the coil wire drawing portion, and the connecting portion is fixed to the outer peripheral portion of the coil portion or the upper end portion or the lower end portion of the coil portion with an adhesive or the like. . In a fifth aspect of the present invention, in the magnetic gapless speaker as described above, a conductive portion made of copper foil or the like is provided at a hem portion from a lower end portion of a coil portion of a voice coil to a lower end portion of a coil bobbin, and the voice portion is provided on the conductive portion. Connect the coil wire lead-out part of the coil and the tinsel wire.

[0013]

When a voice coil is incorporated in a magnetic gapless speaker, a bobbin member is mounted on at least a part of the outer peripheral portion of the coil portion of the voice coil, and the bobbin member supports a diaphragm or suspension or other voice coil. Join the parts. In this form, the voice coil can be made bobbinless, and the bobbin material can be injection-molded with a heat resistant resin or the like to insert-mold the voice coil into the bobbin material. 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 is covered with a reinforcing paper such as a reinforcing paper to fix the coil coil to the outer periphery, or the bobbin material. Alternatively, a conductive portion made of copper foil or the like is provided on the reinforcing paper, and the coil wire lead-out portion of the voice coil and the tinsel wire for input are connected and wired to the conductive portion. Instead of the bobbin member or the pressing member, at least one pair of conductive parts made of strip-shaped copper foil or the like is directly attached to a part of the outer peripheral part of the voice coil, and the voice coil is attached to the conductive part. It is also possible to connect and connect the coil wire drawing portion and the tinsel wire.
Alternatively, a tinsel wire may be connected and wired to the coil wire lead-out portion, and the connection portion may be fixed to the outer peripheral portion of the coil portion or the upper end portion or the lower end portion of the coil portion with an adhesive or the like. A conductive portion made of copper foil or the like is provided at the hem portion from the lower end portion to the lower end portion of the coil bobbin, and the coil wire lead-out portion of the voice coil and the tinsel wire are connected and wired to this. By using the voice coil structure as described above,
The number of man-hours required for producing the voice coil can be substantially the same as the conventional one, and moreover, 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-hours as in the conventional art. Therefore, the assembly and the wiring of the magnetic gapless speaker are facilitated and the high performance thereof is easily maintained. be able to.

[0014]

Embodiments FIGS. 5 to 1 show an embodiment of a speaker according to the present invention.
It will be described based on 9. As a first example, the one shown in FIG. 5 has 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 formed by melting and adhering 6B (hereinafter referred to as an iron core wire) is wound in parallel at the same time, and a direct current resistance is about 5.4Ω.
The voice coil 1 having an inner diameter of 35.5 mm was set. The details of the iron core wire 16 are the wires 16A made of iron material.
Of course, the resistance value increases and the conductivity decreases, but if the conductivity of the wire made of only copper is 100%, the conductivity of the iron core wire 16 is about 60%.
The wire 16 is drawn into a conductor having a diameter of 0.19 mm, and the surface is subjected to insulation. Further, the voice coil 1 adopts a bobbinless structure for the purpose of reducing the weight of the voice coil, and the winding start portion 13 and the winding end portion 1
In order to prevent the loosening of No. 4, the vicinity of the winding end portion 14 is wound on the third layer for about two turns. It should be noted that, for convenience of explanation, the structure relating to the prevention of the separation is omitted in the following drawings.

On the outer peripheral portion of the coil portion of the voice coil 1, a reinforcing paper 1B as shown in FIG.
m, length 50 mm, thickness 0.05 mm)
Then, a pair of copper foils 1C1 and 1C2 having a width of 9 mm, a length of 11 mm and a thickness of 0.01 mm are attached as shown in the figure, and further, a copper foil 1C3 having a width of 4 mm and a length of 11 mm is made of kraft paper as shown in the figure. It is pasted on the center line. The reinforcing paper 1B made of kraft paper on which the conductive portion 1C is arranged in this manner is attached to the outer peripheral portion of the coil as shown in the drawing, and the coil wire winding start end portion 1 is formed.
3 and the insulating layer of the winding end portion 14 are peeled off,
The winding start end 13A of the aluminum wire 15 is the copper foil 1C1, the winding start end 13B of the iron core wire 16 is the copper foil 1C3, and the winding end end 14A of the aluminum wire is the copper foil 1C3. The winding end end portion 14B is connected to the copper foil 1C2 by soldering.

In the case of the present embodiment, the copper foil 1C3 is provided as described above because the series wiring is made in accordance with the impedance specifications of the coil, and the copper foil is used as a relay. However, when the coil wires are wired in parallel for the purpose of specification. It may be at two places as shown in FIG. Further, in the case of the present embodiment, the copper foil 1C is attached to the surface of the kraft paper for work reasons, but the attachment method of the copper foil 1C may be changed according to the purpose of specification. For example, when insulation strength is not required so much, as shown in FIG. 8, since the voice coil coil 1 itself has an insulating coating, a copper foil may be directly attached, or one side of the copper foil may be attached. An insulating coating such as phenol may be provided and the insulating coating side may be attached to the outer peripheral portion of the coil 1. In order to increase the insulation strength, the reinforcing paper 1B may be made of a material having high insulation strength, such as an insulating film.

If the weight of the voice coil 1 is not limited and the strength of the voice coil 1 is important, as shown in FIG. 9, heat-resistant resin is injected into the bobbin member 1 by a method such as injection molding.
A1 is prepared, and the bobbin material 1A1 is attached to the outer circumference of the coil portion, or the bobbin material 1A1 is attached by a method such as insert molding of the voice coil 1,
The conductive portion 1C such as the copper foil may be attached to the outer peripheral portion of A1. In this case, the arrangement portion 1A2 for arranging the diaphragm 3 can be formed on the outer peripheral side of the bobbin material 1A1, and further the arrangement portion 1A3 for arranging the damper 5 and the like can be formed. it can. Also, the bobbin material 1
As shown in FIG. 10, the notch 1A3 may be formed on the upper portion of the bobbin material 1A1 corresponding to the copper foil as the connecting means for connecting the coil wire and the conductive portion 1C when A1 is used. Therefore, the end portion of the coil wire can be guided to the conductive portion 1C from the cutout portion 1A3. Although not shown, the bobbin member 1 is provided with holes or the like in place of the notch 1A3.
Needless to say, the bobbin 1A may be formed on the inner peripheral side of the bobbin 1A as in the conventional case, if the strength is required.

The voice coil 1 described above is set in a magnetic circuit. The magnetic circuit according to the embodiment of the present invention is shown in FIG.
The configuration is shown in. That is, the magnet M used in this embodiment
1 and M2 are neodymium magnets with an outer diameter of 34
2 mm ring, inner diameter 12 mm, thickness 9 mm
The magnets M1 and M2 are individually magnetized in the thickness direction. In order to support the magnets M1 and M2 and the center plate SP, an aluminum holder H as shown in FIG. 11 was produced. At the center of the bottom of the holder H, there is provided a cylindrical center guide portion H1 which is directed upward from the bottom portion, and a magnet M1 is provided at the lower end portion of the center guide portion H1.
A step H2 having a function of positioning 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 with the magnet M2 so that the N pole faces upward in the figure.
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 having an inner diameter and a ridgeline portion of the inner diameter chamfered by C0.4 is press-fitted into the center guide portion H1. In the case of the present embodiment, the diameter dimension of the center plate SP is set, but the diameter dimension of the center plate SP is of course adjusted in consideration of the conversion efficiency and the cogging phenomenon during coil vibration. .

The lower surface of the center plate SP is pushed to a position where it is in close contact with the N pole side of the inserted magnet M2, and an adhesive is applied to the upper surface of the center plate SP after the press fitting so that the N pole of the magnet M1 faces downward. The magnet inner diameter portion M11 is inserted into the center guide portion H1 and is pushed to a position where it is in close contact with the upper surface of the center plate SP.
In this state, the magnets M1 and M2 have the same poles, that is, the N poles face each other, and the center plate outer peripheral portion SP2 has the magnet M when the center plate SP is sandwiched.
The outer peripheral portions M12 and M22 of 1 and M2 are installed so as to project outside by about 0.4 mm.

To attach the magnetic circuit to the frame F, the holder H is attached to the frame F.
Has a flange H with a width of about 2 mm and a thickness of 2.5 mm.
3 are provided, and four mounting portions H4 are formed on the flange portion H3 by 90 ° distribution. Further, the mounting portion H
4 is tapped with a diameter of 4 mm to form a tap portion H5. After applying a rubber adhesive to the flange portion H3, the bottom portion of the frame F is attached. Since 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. To 4 mm
The magnetic circuit and the frame F are fixed with the screw 6 of.

As shown in the figure, the damper 5 is installed on the voice coil 1 installed in the magnetic circuit. The damper 5 is formed by impregnating a cotton cloth or the like with a thermosetting resin such as phenol, and then thermoforming the corrugation 51 or the like. It is a general molded product. The damper 5 is provided with a conductive portion by the method previously proposed by us. In other words, two halves of a flat knitted brocade thread 2H (hereinafter referred to as a plain brocade thread) are sewn in parallel with the center line, and are attached along the corrugation 51. The distance between the tinsel cords 2H corresponds to the distance 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, the conductive portion 1C provided on the outer peripheral portion of the voice coil 1 and the flat portion extending to the damper inner peripheral portion 52. Align the position of the end 2H1 of the braided tinsel wire and set the damper 5
, The flat knitted tinsel wire end 2H1 extending to the damper inner peripheral portion 52 and the conductive portion 1C are connected to the outer peripheral portion of the voice coil 1 by soldering. After applying the adhesive to the contact portion between the outer peripheral portion and the damper inner peripheral portion 2, 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 provided. 5 is adhered and the soldered portion is covered with the adhesive. As a result, we were able to complete a speaker that was practically sufficient.

As a second example, as shown in FIG. 12, only an aluminum wire having a conductor diameter of 0.19 was wound and the direct current resistance was set to about 5.4Ω to form the voice coil 1. The coil wire was pulled out from the winding start portion 13 and the winding end portion 14 so as to crawl upward on the outer circumference of the coil as shown in FIG. 13, and the crawl portion was covered and fixed with a reinforcing paper 1B. The tip portion projecting from the reinforcing paper 1B is subjected to terminal treatment such as peeling of the insulating coating or solder coating in the same manner as in the conventional case. The magnetic circuit and other parts are the same as in the first example.

When the voice coil 1 having this structure is used, wiring similar to that of the first conventional example shown in FIG. 1 is possible. That is, as shown in FIG. 13, after inserting the damper inner peripheral portion 52 into the coil outer peripheral portion and applying an adhesive to the voice coil 1 outer peripheral portion and the damper inner peripheral portion 52, the diaphragm 3 and the voice coil 1 are assembled. Although the transition is made, a hole 31 or an eyelet is provided at a predetermined position of the cone paper 1, and the hole 31 or the eyelet and the coil wire drawing portions 13 and 14 arranged on the outer periphery 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 end portions 11 and 12 arranged in the outer peripheral portion of the coil 1 are made to crawl the surface of the diaphragm 3 from the cone paper neck portion 32 to the hole 31 or eyelet.

Further, the tinsel wire 2 is inserted in the hole 31 or the eyelet.
Through the end 21 of the brocaded thread 2 and the ends 11 and 12 of the coil wire 1 to which solder coating has been applied by soldering or the like, and the adhesive A is attached to the neck 32. Is applied to bond the vibrating plate 3 and the voice coil 1, and then the connecting portion and the crawling portion are also coated so as to be covered with the adhesive A, and the connecting portion and the crawling portions of the coil wire end portions 11 and 12 are covered. Is fixed to the surface of the diaphragm 3, and the connecting portion and the crawling portion are coated. Also, after the other end 22 of the tinsel wire 2 is connected and wired 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.
19 aluminum wires and iron core wires are wound in parallel at the same time, and a voice coil 1 having a direct current resistance of about 5.4Ω is formed, and a conductive portion 1C is attached in the same manner as in the first example.
As shown in FIG. 12, only the aluminum wire having a diameter of 0.19 is wound, the direct current resistance is set to about 5.4Ω to form a voice coil, and the conductive portion 1C is attached as shown in FIG. One end 21 of the line may be wired. In addition, FIG.
A voice coil 1 that does not use the conductive portion 1C as shown in FIG.
It is also possible to That is, the draw-out from the winding start portion 13 and the winding end portion 14 of the coil wire is made to crawl upward on the outer circumference of the coil, and the crawling portion is covered and fixed with a reinforcing paper 1B, and extends beyond the reinforcing paper 1B. The tinsel wire 2 is wired at the tip of the wire, and the wiring portion is directly fixed with the adhesive A. The magnetic circuit and other parts are the same as in the first example. Further, in the case of the present embodiment, although the drawer portion is covered and fixed with the reinforcing paper 1B, the drawer portion may be fixed with an adhesive.

In the case of this embodiment, as shown in FIG.
The damper inner peripheral portion 52 is inserted into the outer peripheral portion of the voice coil 1.
After the adhesive A is applied to the outer peripheral portion and the damper inner peripheral portion 52, the process proceeds to the assembly of the diaphragm 3 and the voice coil 1. A hole 31 or the like is provided at a predetermined position of the diaphragm 3 to make the voice coil 1 At a predetermined position, that is, the holes 31 and the like and the position of the tinsel cord 2 arranged on the outer peripheral portion of the voice coil are aligned, and the cone paper neck portion 32 is inserted into the outer peripheral portion of the voice coil.
The tinsel wire 2 is made to crawl on the surface of the diaphragm 3 from the hole 31 to the hole 31.

Further, the tinsel wire end portion 22 is passed through the hole 31 to the rear side of the diaphragm 3, and the tinsel wire tip portion 22 is inserted into the input terminal lug 4.
After connecting and wiring to, the tinsel wire 2 is formed into an appropriate shape. Further, after the adhesive A is applied to the neck portion 32 to bond the diaphragm 3 and the voice coil 1 to each other, the crawl portion or the like is coated so as to be covered with the adhesive A, and the crawl portion or the like is applied to the surface of the diaphragm 3. The speaker is fixed, and the crawling part is coated to complete a practically sufficient speaker.

In this embodiment, the tinsel wire 2 has the above-mentioned arrangement and wiring structure. However, when the winding width of the voice coil 1 is large, the tinsel wire 2 is connected to the cone paper neck portion 32 as shown in FIG. It is also possible to arrange it in the vicinity of an intermediate 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, the 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
It is also possible to provide a conductive portion including the conductive portion 1C and the like at the portion called the hem. Also in this case, as in the above-mentioned embodiment, as shown in FIG. 17, the damper 5 is attached to the conductive portion 1C.
The flat knitting tinsel cord 2H and the like extending over the inner circumference of the can be connected. Further, as shown in FIG.
The configuration may be such that the tinsel thread 2 for input is connected to C. Note that the speaker structure 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 cord 2 can be inserted into the hole and connected to the input terminal lug 4. In this case, the damper 5 having the conductive portion 2H is expensive.
Not only is it possible to reduce the cost because there is no need to use, but it is not necessary to draw a voice coil wire around the upper surface of the diaphragm 3 and bond it to the upper surface of the diaphragm 3. Since the manufacturing process can be saved, it is possible to reduce the manufacturing cost.

[0032]

As in the present invention, the coil wire lead-out portion is laid on the outer peripheral portion of the coil portion and fixed by a reinforcing paper or the like, or a conductive portion made of copper foil or the like is attached to the outer peripheral portion of the coil portion. By adopting the voice coil structure, it is possible to omit the conventional general coil bobbin and to greatly reduce the amount of the coil bobbin material, which facilitates the assembly of the magnetic gapless speaker and improves the performance. .

Also, the voice coil can maintain the same quality as the conventional one, and the wiring work can be carried out extremely easily without exceeding the number of wiring work of the conventional wiring. In addition, the voice coil can be easily reinforced by mounting the bobbin material used in the conventional voice coil such as kraft paper or resin film on the outer peripheral portion of the coil portion. Therefore, the resonance of the coil can be set to an almost arbitrary frequency, so that the performance and the sound quality can be improved.

In general, if the upper and lower ends of the voice coil are supported by suspensions, the rolling phenomenon of the voice coil can be effectively prevented. Therefore, as in the present invention, a conductive portion is provided at the bottom of the lower end of the bobbin. If a tinsel wire for input is connected to this, the tinsel 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 will be supported by the upper and lower ends, the rolling phenomenon of the voice coil can be effectively suppressed,
Moreover, the speaker structure has extremely simple wiring.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view showing a speaker configuration of a second conventional example.

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

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 the configuration of a voice coil 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 of 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 cross-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 thereof removed.

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

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

FIG. 13 is a sectional view showing the overall structure of a 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 cross-sectional view showing another configuration example of the third embodiment.

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

FIG. 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]

 1 Voice coil 1A1 Bobbin material 1B Reinforcing paper 1C Conductive part 2 Kinshi wire

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[Procedure amendment]

[Submission date] March 31, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

3. A process according to claim 1, bobbin material (1A1) is characterized in that an injection molded by heat-resistant resin or the like
The described speaker.

[Procedure amendment]

[Submission date] July 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title of invention Speaker

Claims (9)

[Claims] 1. A magnet (M
1, M2) are arranged so that the same poles face each other, and the voice coil (1) is arranged in the magnetic field due to the repulsive magnetic flux obtained near the outer periphery of the magnet. (3) A reinforcing paper (1B) or a bobbin material (1A1) is attached to at least a part of the outer peripheral portion of the coil portion in FIG. 2. The speaker according to claim 1, wherein the voice coil (1) has no bobbin. 3. The speaker according to claim 1, wherein the bobbin material (1A1) is injection-molded from a heat-resistant resin or the like, and the voice coil (1) is insert-molded on the bobbin material. . 4. A magnet magnetized in the thickness direction (M
1, M2) are arranged so that the same poles face each other, and the voice coil (1) is arranged in the magnetic field due to the repulsive magnetic flux obtained in the vicinity of the outer periphery of the magnet. A speaker characterized in that a coil wire lead-out portion of a turned voice coil (1) is laid along an outer peripheral portion of the coil portion and is covered with a reinforcing paper (1B) to be fixed to the outer periphery of the coil portion. 5. Bobbin material (1A1) or reinforcing paper (1B)
The speaker according to claim 1 or 4, further comprising a conductive portion (1C) made of copper foil or the like. 6. A magnet magnetized in the thickness direction (M
1, M2) are arranged so that the same poles face each other, and the voice coil (1) is arranged in the magnetic field due to the repulsive magnetic flux obtained near the outer periphery of the magnet. ), A conductive part (1C) made of at least one pair of strip-shaped copper foils is attached to a part of the outer peripheral part of the coil part, and the coil wire lead-out parts (11, 12) of the voice coil are attached to the conductive part. A speaker characterized by connecting and wiring. 7. A tinsel wire (2) for inputting to a conductive part (1C)
7. The speaker according to claim 6, wherein is connected and wired. 8. A magnet magnetized in the thickness direction (M
(1) and (M2) are arranged so that the same poles face each other, and the voice coil (1) is arranged in the magnetic field due to the repulsive magnetic flux obtained near the outer periphery of the magnet. (11) (1
A speaker characterized in that a tinsel wire (2) is connected and wired to 2), and the connecting portion is fixed to an outer peripheral portion of the coil portion or an upper end portion or a lower end portion of the coil portion with an adhesive or the like. 9. A magnet magnetized in the thickness direction (M
1, M2) are arranged so that the same poles face each other, and the voice coil (1) is arranged in the magnetic field due to the repulsive magnetic flux obtained near the outer periphery of the magnet. ), A conductive portion (1C) made of copper foil or the like is provided at the hem portion from the lower end portion of the coil portion to the lower end portion of the coil bobbin, and the tinsel wire (2) for input is connected to the conductive portion. Speaker.