WO1993020666A1 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
WO1993020666A1
WO1993020666A1 PCT/JP1993/000401 JP9300401W WO9320666A1 WO 1993020666 A1 WO1993020666 A1 WO 1993020666A1 JP 9300401 W JP9300401 W JP 9300401W WO 9320666 A1 WO9320666 A1 WO 9320666A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
wire
magnetic
speaker
magnetic material
Prior art date
Application number
PCT/JP1993/000401
Other languages
English (en)
Japanese (ja)
Inventor
Yoshio Sakamoto
Shirou Iwakura
Akio Tanase
Kaoru Yamazaki
Original Assignee
Kabushiki Kaisha Kenwood
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Kenwood filed Critical Kabushiki Kaisha Kenwood
Publication of WO1993020666A1 publication Critical patent/WO1993020666A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the present invention relates to a speaker, and more particularly, to a speaker that is efficient and can be reduced in weight.
  • a conventional general speed force uses a magnetic circuit composed of a yoke Y, a single magnet ⁇ and a top plate ⁇ , and a magnetic gear.
  • the voice coil 1 was arranged in the top G.
  • 11 is a voice coil bin
  • 2 is a diaphragm
  • 3 is a damper
  • 5 is a frame
  • 7 is a dust cap.
  • FIG. 23 shows an example in which a windsor (medium and high frequency diaphragm) is mounted above the net portion 2.1 of the cone diaphragm 2.
  • a voice coil wire is formed by mixing powder of a magnetic material F into a conductive material C.
  • the magnets magnetized in the thickness direction are arranged so that the same poles face each other, and the voice coil is arranged and driven in the repulsive magnetic field generated by the magnetic gap between the two magnets.
  • Various loudspeakers for the purpose of thinning, mass reduction, and the like have been proposed, for example, as disclosed in Japanese Patent Application Laid-Open No. 59-148500 and Japanese Patent Application Laid-Open No. 1989-1999. There are things that are. Looking at this in terms of the relationship between the repulsive magnetic field and the voice coil, the structure disclosed in Japanese Patent Application Laid-Open No. 59-148500 is shown in FIG.
  • the publication is of the form shown in FIG. In the figure, Ml and M2 are magnets, P is a sensor plate arranged on the opposing surface of both magnets, 1 is a voice coil, and 11 is a coil bobbin.
  • the magnetic wire made of the magnetic material F itself and the conductive wire made of the conductive material C itself are wound in different layers, respectively. Since material C has an overwhelmingly higher coefficient of thermal expansion than magnetic material F, the entire bonded portion between the magnetic wire and the conductive wire, and the end portion between the magnetic wire and the material and the conductive wire are extremely small in the joined portion. It had the disadvantage that it was easy to release.
  • the biggest difficulty of the structure shown in Fig. 25 is that the resistance is increased and heat generation is remarkable because the magnetic material F is mixed into the conductive material C. Also, with this type of voice coil wire, it was extremely difficult to create a voice coil wire. In other words, a very thin wire having a diameter of 0.3 mm or less is usually used for the voice coil wire.
  • a general method for forming the wire is to first form a relatively thick wire, and then draw the thick wire into an elongated shape. It is formed by stretching.
  • a voice coil wire as shown in Fig. 25 when a thick wire is stretched, the magnetic material powder is caught on the edge of the wire discharge hole of the stretcher, and the voice coil wire is There is a risk of disconnection.
  • the stirring operation should be performed in argon or vacuum. If this is done in the middle, this problem can be solved, but there will be problems such as an increase in equipment costs and a large cost.
  • the coil wire uses a voice coil 1 made of only a general conductive material C such as a copper wire, the magnetism required to drive the voice coil 1 is efficiently provided. It was difficult to transmit. That is, the magnetic flux width obtained by the repulsive magnetic field structure is extremely narrow, and an outer plate P of a predetermined thickness made of a magnetic material F is arranged on the outer peripheral portion P 1 of the center plate P, so that the outer periphery of the center plate is arranged. A desired magnetic flux width cannot be obtained unless magnetism is induced in the outer direction of the part P 1, and the flow of magnetism guided to the outer periphery P 1 of the center plate is also broken, except for a part. As shown by, the magnetic flux immediately flows from the outer peripheral portion P 1 of the magnets Ml and M 2 toward the S pole side at the outer peripheral end portions. Therefore, the direction required to drive voice coil 1, that is, voice coil
  • a tape made of a soft magnetic material having an extremely high magnetic permeability such as an amorphous metal tape Fa
  • the magnetic flow has a shape that easily crosses the coil wire as shown by a broken line.
  • the amorphous metal tape Fa is disposed on the outermost peripheral portion 12 of the voice coil 1, that is, located farthest from the outer peripheral portion P1 of the center plate P where the most magnetism is emitted. It will be. As is well known, the magnetism gets weaker the farther away, so In this case, amorphous metal with extremely high magnetic permeability is used for the purpose of converging the weakened magnetism efficiently.
  • the amorphous metal tape Fa is not generally used compared to conventional soft magnetic materials such as iron and permalloy.
  • conventional soft magnetic materials such as iron and permalloy.
  • amorphous metal tape Fa has a high elastic modulus and is hard to bend, so that it is difficult to curl, and it is difficult to preserve the shape along the outer peripheral portion of voice coil 1. There is. Therefore, even when the amorphous metal tape Fa is adhered to the coil wire outer peripheral portion 12 with an adhesive or the like, the adhered state must be maintained until the adhesive exhibits strength. It has the disadvantage of increasing the number of steps and the complexity of the work, and the end of the amorphous metal tape Fa is easily lifted even after the tape Fa is bonded. Reinforcement has the disadvantage that the efficiency of the voice coil 1 decreases because the weight of the voice coil 1 increases. In the case shown in Fig. 27, the outer diameter P1 of the center plate P is smaller than the outer diameter of the magnets M1 and M2. There is also the disadvantage that the amount of magnetic flux that flows is small and efficiency is poor.
  • an object of the present invention is to solve the above-mentioned drawbacks of the conventional loudspeaker, and to provide a speeding force capable of remarkably increasing the efficiency, achieving high performance and reducing the weight.
  • the whole or a part of the voice coil of the speaker is formed by a conductive wire core formed of a conductive material and a magnetic material cladding disposed on at least a part of the surface of the conductive wire.
  • a composite wire comprising a core of a magnetic wire formed of a magnetic material and a cladding of a conductive material disposed at least partially on the surface of the magnetic wire.
  • a voice coil structure is configured such that a plurality of voice coil wires having different materials are simultaneously wound so that the materials of the voice coil wires are alternately different.
  • the magnets magnetized in the thickness direction are arranged so that the same poles face each other, and at the same time, a center plate made of a magnetic material is sandwiched between the opposing surfaces of both magnets to repel both magnets. It is also possible to constitute a magnetic circuit section by a magnetic field, arrange the voice coil outside the center plate so as to be located in the repulsive magnetic field, and drive the diaphragm with the voice coil. In this case, the diameter of the center plate is formed to be larger than the diameter of both magnets.
  • the voice coil may have a bobbin-less structure.
  • a diaphragm such as cone paper or a suspension such as a damper may be disposed at the upper end or the lower end of the voice coil.
  • a diaphragm such as a piece of paper or a suspension such as a damper can be arranged on the outer periphery of the voice coil.
  • a binder may be attached to the outer periphery of the voice coil at a position above the neck portion of the diaphragm made of cone paper. In this case, near the top or slope of the binder, One chamber or dust cap is installed.
  • the magnetic circuit and the frequency can be directly attached to the punching of the speaker grill or the speaker grill to form a frameless structure.
  • Conductive wire made of conductive material, all or part of voice coil Or a composite wire composed of a magnetic material and a magnetic material disposed at least partially on the surface of the conductive wire, or a magnetic wire formed of a magnetic material and at least a portion of the surface of the magnetic wire. Since it is composed of a composite wire composed of the placed conductive material, the magnetic flux from the magnet can pass through the magnetic material satisfactorily, and not only can the efficiency of the speed force be improved, but also the voice coil itself can be improved. It can also reduce the weight of the vehicle.
  • the voice coil in a magnetic circuit capable of obtaining a repulsive magnetic field, a magnetic material is arranged on the outer periphery of the center plate, and the magnetism is guided further outward from the outer periphery of the center plate.
  • the magnetic flux crossing the coil wire is easily obtained. Therefore, it is possible to obtain a sound pressure level that is practically acceptable without configuring a magnetic gap as in the past, and it is possible to further reduce the weight and thickness.
  • the conventional device shown in FIG. 26 cannot improve the sound pressure that cannot be obtained because it cannot obtain a sound pressure particularly in the middle and low frequency range. Thus, characteristics that generally improve from the low-mid range to the high-frequency range can be obtained.
  • the position of the magnetic material is located very close to the magnetic flux, so there is an advantage that the efficiency is improved, and furthermore, the weight of the voice coil can be reduced.
  • the center plate sandwiched between the two magnets is one thigh larger than the diameter of the magnet.
  • the magnetic flux can be obtained more effectively outside the outer periphery of the center plate than when the outer diameter of the center plate is smaller than the outer shape of the magnet.
  • a structure in which a diaphragm such as cone paper or a suspension such as a damper can be arranged at the upper end, lower end, or the outer peripheral portion of the voice coil can be further facilitated to make the voice coil thinner.
  • a structure in which a diaphragm such as cone paper or a suspension such as a damper can be arranged at the upper end, lower end, or the outer peripheral portion of the voice coil can be further facilitated to make the voice coil thinner.
  • a stroke is attached to the outer periphery of the voice coil above the neck of the diaphragm, and a chamber, dust cap, or the like is attached to the vicinity of the top of the wizard or to a slope portion thereof.
  • Can have a margin.
  • the weight can be further reduced.
  • FIG. 1 is a sectional view of the speaker according to the present invention.
  • FIG. 2 is a sectional view showing another embodiment of the speeding force.
  • FIG. 3 is a sectional view showing still another embodiment of the speeding force.
  • FIG. 4 is a cross-sectional view showing an embodiment of a speaker using a voice coil formed of different types of composite wires.
  • FIG. 5 is a sectional view showing another embodiment of a speaker using a voice coil formed of a different type of composite wire.
  • FIG. 6 is a cross-sectional view showing still another example of the speed using a voice coil formed of different types of composite wires.
  • FIG. 7 shows coil wires made of different materials so that the materials differ alternately.
  • FIG. 7 is a cross-sectional view showing an example of the speed force wound on the wire.
  • FIG. 8 is a sectional view of the speaker using the repulsive magnetic field according to the present invention and a partially enlarged sectional view of the voice coil.
  • FIG. 9 is an exploded perspective view showing a cross section of the magnetic circuit component of the embodiment in FIG.
  • FIG. 10 is an enlarged sectional view of a main part showing another example of the configuration of the voice coil in the speaker of FIG.
  • FIG. 11 is a cross-sectional view of a main part showing still another configuration example of the voice coil in the speaker of FIG.
  • Fig. 12 is a cross-sectional view of the main part showing an example in which a composite wire made of a different material is wound with a different winding layer as the voice coil in the speaker of Fig. 8.
  • FIG. 13 is an enlarged sectional view of a main part showing an example in which a composite wire is used as a part of a voice coil as a voice coil in the speaker of FIG.
  • FIG. 14 is an enlarged sectional view of a main part showing an example in which voice coil wires of different materials are alternately wound with different materials as the voice coil in the speaker of FIG.
  • FIG. 15 is an enlarged sectional view of a main part showing another configuration example of the voice coil of FIG.
  • FIG. 16 is a sectional view showing still another embodiment of the speeding force according to the present invention.
  • FIG. 17 is a sectional view showing an embodiment of a speaker to which a wizard is attached.
  • FIG. 18 is a cross-sectional view showing an embodiment of the spinning force for reducing the weight.
  • FIG. 19 is a cross-sectional view showing an embodiment of a speedless force having a frameless structure.
  • FIG. 20 is a frequency characteristic diagram comparing frequency characteristics of the speaker according to the embodiment of FIG. 8 and a conventional speaker.
  • FIG. 21 is a frequency characteristic diagram comparing the frequency characteristics of the speed force according to the embodiment of FIG. 17 and the conventional speed force.
  • FIG. 22 is a cross-sectional view showing a conventional spinning force.
  • FIG. 23 is a cross-sectional view showing another configuration of the conventional speaker.
  • FIG. 24 is a cross-sectional view showing a main part of a conventional speed force in which a rectangular wire of magnetic material is arranged outside the bobbin.
  • FIG. 25 is a cross-sectional view of a conventional speaker using a voice coil wire in which a magnetic material powder is mixed into a conductive material.
  • FIG. 26 is a sectional view showing a conventional repulsive magnetic field type speaker.
  • FIG. 27 is a cross-sectional view showing another configuration of a conventional repulsive magnetic field type speaker.
  • Embodiments of the loudspeaker according to the present invention will be described with reference to FIGS. 1 to 21. Parts common to those of the prior art described with reference to FIGS. Detailed description is omitted.
  • A is a composite wire formed by disposing a magnetic material F on the surface of a conductive wire formed of a conductive material C.
  • the outermost insulating layer of the voice coil wire is omitted.
  • the composite wire A is wound around a voice coil bobbin 11 to form a voice coil 1, and is disposed in a magnetic gap G of a conventional speaker shown in FIG.
  • the magnetic flux from the magnet M is concentrated and easily transmitted by the magnetic material F of the composite wire A, so that the efficiency of the speaker is improved.
  • the conductive material C is arranged at the center, and the magnetic material F is arranged as a cladding on the core surface of the conductive material C to form the composite wire A.
  • the amounts of the magnetic material F and the magnetic material F can be appropriately adjusted in consideration of the difference between the conductivity and the coefficient of thermal expansion.
  • the composite wire A does not generate much heat because the composite wire A itself has a higher conductivity and a good heat dissipation effect than the magnetic wire consisting of only the magnetic material F. Therefore, the difference in the coefficient of thermal expansion between the conductive material C and the magnetic material F does not need to be considered so important, and a stable state is maintained.
  • the structure is such that only the conductive wire located at the center can secure sufficient conductivity, even if the conductive wire expands and the magnetic material F breaks, the characteristics of the speed force There is no problem, and in this case, the magnetic material F does not fall off from the conductive wire, so there is no problem with the effect of concentrating the magnetic flux from the magnet M. .
  • a composite wire A by arranging the conductive material C as a cladding on the surface of the core of the magnetic wire formed by the magnetic material F, and in this case, the speaker wire is formed in the same manner as described above. Efficiency can be improved. In particular, in terms of the coefficient of thermal expansion, there is no particular problem because the conductive material C having a high coefficient of thermal expansion and heat radiation is disposed on the surface side.
  • the treatment of the wire material differs depending on whether the amount of the conductive material is increased or the amount of the acidic material is increased. In other words, if a material that requires a large amount is used as a base material, the amount can be controlled relatively easily.
  • a conductive material such as copper was used as a core, and a magnetic material such as permalloy and iron was used as a cladding, and the magnetic material was attached around the copper wire. .
  • the advantage of this method is that it is an effective method when the amount of conductive material such as copper is large and the amount of magnetic material is small.
  • the amount of magnetic material described in the text is close to the limit at present, but is small.
  • the amount of control is about 1.5 micron for plating, and a smaller amount of control is possible by techniques such as vapor deposition.
  • a magnetic material such as iron
  • a conductive material such as copper
  • DIP FOMINNG PROCESS immersion of molten copper
  • the wire (hereinafter referred to as an iron core wire) can be controlled such that the thickness of a conductive material such as copper is about 30 to 80% of the thickness of the wire, It goes without saying that the lower the proportion of copper, the lower the cost. For even smaller amounts, techniques such as plating and vapor deposition are possible.
  • an iron core wire with a diameter of 0.3 mm, a cross-sectional area ratio of iron to copper of 56:44, and a conductivity of 60%, and further reduced the iron core wire to ⁇ 0.21 mm.
  • a wire coil with a width of about 6.5 mm, a DC resistance of about 3.4 ⁇ , and a voice coil inner diameter of ⁇ 30.4 ram can be obtained. It turned out that the line could be drawn to about 0.1 mm.
  • the iron core wire is used as it is, the amount of magnetic material is too large and it may be attracted to the magnetic gap or cause a cogging phenomenon.
  • the iron core wire By alternately arranging every turn as shown in Fig. 15, it was possible to avoid this phenomenon and to further improve a part of the characteristics, especially to control the rise of low frequencies. .
  • a magnetic material such as iron or permalloy is applied to the surface (one side) of the copper foil having a thickness of 5 to 8 to a thickness of about 2.5 micron, and the material is applied to a 0.8 thigh width.
  • the slit wire was subjected to an insulation treatment to obtain a voice coil wire. Therefore, a more effective coil can be created by using the wire as shown in the figure.
  • a magnetic material F dissolved in an appropriate thickness is appropriately arranged on the entire surface of the thick rod-shaped conductive material C to form a thick rod-shaped composite wire.
  • Stretching and forming wire Cladding method of pressing magnetic material F on conductive material C, applying magnetic material F on the surface of conductive material C, depositing magnetic material F on the surface of conductive material C Etc. can be appropriately adopted.
  • the magnetic material F can be formed thicker, so that the performance can be further improved.
  • the composite wire A used for the voice coil 1 may be a wire in which the magnetic material F is arranged on the entire surface of a rectangular wire C 1 formed of a conductive material C as shown in FIG.
  • the magnetic material F may be disposed on one side of the conductive material foil C3 as described above, and may be slit to a predetermined width and then subjected to insulation treatment.
  • the conductive material C may be not only copper but also aluminum or the like, and the arrangement method of the magnetic material F on the conductive material C can be appropriately selected as described above.
  • the voice coil 1 can be configured by winding a plurality of types of composite wires A in which the materials of the magnetic material F to be arranged are different from each other with different winding layers.
  • the first layer and the second layer are wound around a composite wire A in which iron Fi is arranged around the copper wire C1
  • the third and fourth layers are wound around the copper wire C1.
  • a voice coil 1 is formed by winding a composite wire A on which permalloy Fp is arranged.
  • Fig. 5 shows an example in which composite wire A is used as a part of voice coil 1.
  • the first and second layers are wound with ordinary copper wire C1, and the third and fourth layers are composite wire A.
  • the voice coil 1 is shown. This place In this case, the amounts of the conductive material C and the magnetic material F can be appropriately changed in consideration of the conductivity and the coefficient of thermal expansion.
  • the composite wire A has a lower coefficient of thermal expansion than the wire consisting of only the magnetic material F. Therefore, as shown in FIG. 5, the copper wire C 1 and the composite wire A are wound by changing ⁇ . Even in a rotating configuration, the wires do not peel off due to the difference in the coefficient of thermal expansion.
  • FIG. 6 is an example in which a plurality of voice coil wires of different materials are wound so that the material of the voice coil 1 is alternately different.
  • two composite wires A in which the magnetic material F is iron F f and two composite wires A in which the magnetic material F is a permanent magnet F p are simultaneously wound so that the material changes alternately.
  • FIG. 7 shows an example in which two conductive wires made of a normal conductive material C and two composite wires A are simultaneously wound, and the materials are alternately changed.
  • voice coil wires since it is possible to appropriately select and combine voice coil wires, it is possible to improve the efficiency and weight of the speaker in the same manner as described above while considering the characteristics of the speaker to be created. .
  • the ratio of the magnetic material F to the conductive material C in the composite wire A was adapted to the loudspeaker by selecting the wire to be combined without appropriately changing the ratio depending on the loudspeaker to be implemented. Because voice coil can be created, existing composite wire A can be reused.
  • the magnets Ml and M2 used in this embodiment are neodymium magnets magnetized in the thickness direction, respectively.
  • the outer diameter is 29 mm
  • the inner diameter is 12 mm
  • the thickness is 12 mm.
  • Two rings with six thighs were used.
  • reference numeral 4 denotes a holder. It is used to support the magnets M 1 and M 2 and the center plate ⁇ sandwiched between the magnets M 1 and ⁇ 2.
  • the holder 4 is formed of aluminum, and has a cylindrical center guide 41 extending upward from the bottom at the center of the bottom.
  • a step portion 42 having a function of positioning the magnets Ml and M2 and the center plate P in the height direction is provided at the lower end portion.
  • the magnet M 2 After applying an acryl adhesive to the step portion 42, the magnet M 2 is oriented so that the N pole is directed upward, and the inner diameter portion M 22 of the magnet M 2 is positioned at the center of the holder 4. Insert into one guide part 4 1.
  • the outer shape of the center guide part 41 is processed into a band of 1.1.95, so that it can be easily inserted.
  • insert a ring-shaped center plate P After applying an adhesive to the upper surface of the inserted magnet M2, insert a ring-shaped center plate P having an outer diameter of 29.995 mm, an inner diameter of 11.995, and a thickness of 4 mm.
  • the center plate P is made of iron with an inner diameter and a ridge of the inner diameter which is chamfered with CO.4.
  • the inner diameter P 2 is pressed into the center guide part 41, and the center plate P is pressed.
  • the magnet M2 to the position where the lower surface is in close contact with the N pole side of the magnet M2.
  • an adhesive is applied to the upper surface of the center plate P, and the magnet M 1 is inserted into the center guide portion 41 with the N pole of the magnet M 1 facing down, and the center inner portion M 12 is inserted into the center guide portion 41. Push it in until it comes into contact with the top surface of plate P. Therefore, the magnets M 1 and M 2 whose N poles face each other sandwich the center plate P, and the outer peripheral portion P 1 of the center plate is the outer peripheral portion Mil and M of the magnets M 1 and M 2. It will be installed so that it protrudes about 0.5 mm outside of 21.
  • the holder 4 is fixed to the frame 5.
  • the holder 4 is provided with a flange portion 43 having a width of about two thighs and a thickness of 2.5 on the outside thereof, and the flange 4 is provided.
  • Tongue outside part 4 3 One-sided convex portions 44 are projected at four locations at 90 ° distribution, and taps 45 having a diameter of 4 mm are formed near the center of the convex portions 44.
  • the -frame 5 is a so-called 6.5 inch with an outer diameter of about 16.5 mm and a depth of about 20 strokes, and is made of a 0.7 mm t aluminum plate press.
  • the frame weighs about 40 g.
  • the voice coil 1 as shown in FIG. 1 is installed in the magnetic circuit configured as described above, and the speed as shown in FIG. 8 is formed.
  • the voice coil 1 is constructed by winding a composite wire A around a bobbin material 11 made of a 0.05-thigh PPTA film, and the composite wire A is a surface of a copper wire C 1 that is a conductive material C. It is formed by arranging a permanent magnet Fp as a magnetic material on the whole.
  • the composite wire A is a wire made by coating a copper wire C1 having a diameter of 0.21 mm with a permanent magnet Fp to a thickness of 10 with an adhesive and coating an insulating material.
  • the diaphragm 2 uses a pulp cone-shaped diaphragm with an outer diameter of about 134 mm (including edges), a net diameter of 31 mm, and a depth of about 15 mm, and a damper (suspension).
  • a general one obtained by impregnating a cotton cloth or the like with a phenol and thermoforming a corrugation or the like was used. The vibration thus formed
  • the moving plate 2 and the damper 3 are attached to the assembly of the magnetic circuit and the frame 5 to complete a speaker.
  • the speed shown in FIG. 8 was measured, the characteristic indicated by the solid line in FIG. 20 was obtained.
  • a conventional loudspeaker which has a general magnetic gap without using a repulsive magnetic field and has a voice coil 1 made of copper wire, as shown in Fig. 2 2.
  • the characteristics were as shown by the dashed line in FIG.
  • the vibration system used was exactly the same as that of the above embodiment of the present invention, and the frame 5 had the same shape as that of the above embodiment of the present invention.
  • a commonly used 0.7 mm thigh iron plate press frame is used, and the magnetic circuit is also the same as the conventionally used top plate TP (outer diameter 7 5111111, inner diameter 32.25 mm, 4.5 mm thick), ferrite magnet M (outer diameter 85 thigh, inner diameter 45 mm, thickness 13 strokes) and yoke Y (pole diameter 29.95 thigh, outer bottom) It was measured by the speed of a magnetic circuit assembled with a 75-band marauder and a height of about 20 thighs).
  • the speed of the present invention shown in Fig. 8 and the speed of the conventional When comparing the weights of the speakers, the weight of the magnetic circuit part is about 83 g, the weight of the speaker alone is about 133 g, and the total weight including the grill is about 21.8 g in the above embodiment.
  • the weight of the magnetic circuit was 603 g
  • the weight of the single speaker was about 780 g
  • the total weight including the grill was 8665 g. That is, the loudspeaker according to the above-described embodiment is much larger than the conventional loudspeaker by about 86% in the magnetic circuit part, about 83% in the unit weight of the speaker alone, and about 75% in the total weight including the grill. Weight reduction has become possible.
  • FIGS. 10 to 15 show other examples of the configuration of the voice coil 1 arranged in the repulsive magnetic field type magnetic circuit configured as described above. By appropriately selecting the configuration of the composite wire A, FIG. Will be implemented.
  • Fig. 10 shows an example in which a magnetic material F is arranged on the entire surface of a rectangular wire C1 formed of a conductive material C.
  • Fig. 11 shows a case where a magnetic material F is arranged on one side of a conductive material foil C3. Then, after slitting to a predetermined width, insulation treatment is applied to form a pobinless structure.
  • the voice coil 1 can be configured by winding a plurality of types of composite wires A having different materials of the magnetic material F to be arranged with different windings.
  • composite wire A with iron F f placed around copper wire C 1 as the first and second layers is wound, and Permalloy F p is placed around copper wire C 1 as the third and fourth layers.
  • Fig. 13 shows an example in which a composite wire A is used for a part of the voice coil.
  • the first and second layers are wound with a normal copper wire C1, and the third and fourth layers are combined.
  • Fig. 14 shows an example in which a plurality of voice coil wires of different materials are wound so that the material of the voice coil 1 is alternately different.
  • the composite wire in which the magnetic material F is iron F f A and magnetic material F are perm mouth ⁇
  • Fig. 15 shows two conductive wires made of ordinary conductive material C and two composite wires A simultaneously wound and alternately made of materials. Are different from each other.
  • FIG. 16 shows another embodiment of the speaker, in which the bottom of the magnetic circuit holder 4 in FIG. 2 is made shallow, the voice coil has a bobbinless structure, and the diaphragm 2 and the outer periphery 12 of the voice coil 1 are provided.
  • the end of suspension 3, which is a damper, is directly attached with an adhesive.
  • a reinforcing material 1 ′ such as craft paper is wrapped around the voice coil 1, the diaphragm and the end of the suspension are adhered on the craft paper, and the surface of the craft paper is connected to a lead wire and a void. It is used as a wiring board for joining a coil. Therefore, not only the weight of the conventional speaker or the voice coil bobbin 11 in the speed shown in FIG.
  • the voice coil 1 is arranged at a position close to the outer periphery of the center plate P. That is, since the magnetic material F is arranged at a position where stronger magnetism can be obtained, the driving force of the voice coil 1 can be increased.
  • the bobbin-less coil coil is made by first attaching a thin tape to a cylindrical member made of aluminum or the like, and then applying a thermosetting adhesive formed on the surface of the composite wire with a solvent or the like.
  • the voice coil wire which has been reactivated is wound on the tape, and then the tubular member is heat-dried so that the voice coil wires are thermoset and fixed to each other.
  • the ends of the suspension such as the diaphragm 2 and the damper may be arranged at the upper end or the lower end of the voice coil 1 as necessary. No problem. However, the speed of this structure In this case, as is clear from the figure, one magnet M 1 of the magnetic circuit projects above the voice coil 1.
  • reference numeral 8 denotes a user.
  • the neck 21 of the diaphragm 2 and the inner diameter of the damper 13 are adhered to the outer periphery 12 of the voice coil, and the neck of the user 8 is attached to the upper part of the network 21 and the outer periphery 12 of the voice coil.
  • the dust cap 7 is provided in the vicinity of the top of the wizard 8 by attaching the dust cap 7. Therefore, the distance between the upper surface of the magnet M1 and the inner surface of the dust cap 7 becomes longer, and even if the diaphragm 2 has a large amplitude, the upper end of the magnet M, the dust cap 7 and the dust cap 7 are removed. There is no contact with the inner surface.
  • a speaker frame 5 having an inner diameter of 30.4 mm and a driving plate 2 having the same dimensions as the spinning force shown in FIG. Speaker unit was created.
  • the wither 8 is made of pulp having an outer diameter of about 50 mm, a neck of about 31.5 mm and a depth of about 11 mm, and the dust cap 7 has an outer diameter of about 50 ram.
  • the dome depth is about 7 countries, and a woven fabric impregnated with phenol and thermoformed was used.
  • the speed according to the embodiment of FIG. 17 is slightly different from that of the speaker using the conventional ferrite-based magnet, although the sound sweat level is slightly different. It was possible to obtain acceptable characteristics.
  • a chamber or the like may be attached in place of the force dust cap 7 constituted by attaching the dust cap to the wither 18.
  • the weight of the speaker according to the embodiment of FIG. 17 and the weight of the speaker according to the conventional example are compared in FIG. 23.
  • the weight of the magnetic path of the speaker in this embodiment is about 83
  • the weight of the speaker itself was about 133 g
  • the total weight including the grill was 218 g. Therefore, compared to the conventional general force shown in Fig. 23, the magnetic circuit section is about 86% more than the conventional example (603 g), and the speaker unit weight (780 g) is about 80%.
  • the overall weight, including the grill, was 83%, and the overall weight (including the grill was about 75% for the 865).
  • a speaker having the structure shown in FIG. 18 was prototyped with the aim of reducing the weight as much as possible. That is, the speaker frame 5 is extremely thin and has a substantially U-shaped cross section, and the edge portion 22 is disposed at the end of the diaphragm 2 without using a suspension 3 such as a damper. The end is attached to a frame.
  • the electric capacity of the magnetic circuit part was about 83 g
  • the weight of the speaker itself was about 125 g
  • the grid was The total weight, including the oil, was 210 g.
  • the frame 5 is omitted as shown in Fig. 19, and the notch 91, the grill frame 92, and the speaker grille 9, which is composed of power, are connected to a magnetic circuit.
  • the force was directly attached to the diaphragm and diaphragm 2.
  • a magnetic circuit holder 4 having a sensor guide 41 having the same shape as that shown in FIG.
  • the step portion 42 has an outer diameter of 16 iMi and an inner diameter of 13 min, and a screw portion 44 is provided on the inner diameter of the step portion 42, and the flange portion 43 is The outline was 22 strokes and the thickness was 2 mm.
  • the nut N for attaching the holder 4 to the speaker grill 9 is made of aluminum, and is formed in a “convex” shape in cross section by a bottom surface portion N 1 and a convex portion N 2.
  • a screw portion N3 corresponding to the screw portion 44 of the holder 4 was provided on the outer periphery of N2, and a lightening process was performed on the inner peripheral side of the convex portion N2 for further weight reduction.
  • the outer diameter of the nut bottom portion N1 was 22 mm in diameter and 2 mm in thickness, similarly to the flange portion 43.
  • the method of attaching the magnetic circuit portion to the speaker grill 9 is the same as that shown in FIG.
  • a mounting hole 93 having a diameter of 13 mm is provided in the center of the punching 91 of the speaker grill 9.
  • 9 Insert the nut N 2 into the nut 3 and apply adhesive to the flange 4 3 of the holder 4, insert the screw 4 4 of the holder 4 into the screw 3 of the nut N, and 4 or Nut N is rotated and the punching 91 is sandwiched between the flange 43 and the nut bottom N1.
  • the voice coil 1 has a bobbin-less structure similar to that described above. 13 4 mm (including edge), net diameter 31.5 Hidden, depth approx. 12 Use a pulp cone-shaped diaphragm made of bandits, and attach neck 21 to outer periphery of boysoil 12
  • the edge portion 22 is mounted on the back side of the grill frame 92 in a direction opposite to the normal direction, thereby forming a damperless structure. Further, a woven fabric S was stuck on the back surfaces of the punching 91 and the grill frame 92 for dust prevention.
  • the weight of the magnetic circuit portion including the holder 4 is about 75, and the total weight of the speaker including the speaker grille 9 is the single weight of the splicing force because the speaker itself is frameless.
  • the weight of the vibration system and magnetic circuit was 83 g, and the total weight including the speed grill 9 was about 1668 g. Therefore, compared to the conventional general loudspeaker shown in Fig. 22, the magnetic circuit section is about 88% more than the conventional loudspeaker (603 g), and the speaker unit weight (780 g) is about 88%.
  • the overall weight (865 g), including the speaker grill 9, was 9%, and the weight was reduced by about 81%.
  • the holder 4 is directly attached to the punching 91, and a magnetic path is attached via the holder 4.
  • a magnetic path is attached via the holder 4.
  • another configuration may be used.
  • iron punching is used, but it is needless to say that non-magnetic metal such as aluminum, synthetic resin, or the like may be used. In this case, the weight can be further reduced.
  • the loudspeaker of the present invention by using a composite wire made of a conductive material and a magnetic material for the voice coil, it is necessary and sufficient without using an amorphous metal tape as in the related art. A high sound pressure can be obtained. Therefore, the creation of the voice coil can be performed in the same manner as before, and the cost of coil winding will not increase.
  • a composite wire in which a magnetic material such as iron is arranged on one surface of a conductive material such as copper foil the efficiency can be further improved when the cross section of the coil wire is rectangular or approximately rectangular.
  • the arrangement of the magnetic material and the conductive material in the wire and the selection of the voice coil wire in the voice coil can be easily changed depending on the purpose, so that the voice coil for effectively utilizing the magnetism can be relatively easily formed.
  • the ratio of the magnetic material to the conductive material can be appropriately adjusted in consideration of the coefficient of thermal expansion ⁇ , even if the voice coil is formed of a different type of voice coil wire like a conventional speaker, voice The coil wire, the voice coil bobbin and the voice coil wire do not peel off from each other.
  • the use of a composite wire for the voice coil wire allows the magnetic flux to efficiently cross the coil wire as shown by the arrow in FIG. That is, since the voice coil itself forms a part of the magnetic path without forming the magnetic gap, the driving force of the voice coil can be increased more than the conventional one.
  • a magnetic gap is not required, it is possible to arrange a diaphragm such as cone paper or a suspension such as a damper on the outer peripheral portion or the upper and lower ends of the voice coil. Since the overall height can be reduced, weight and thickness can be reduced at that time, and it is possible to obtain a form that is extremely suitable for the shape required especially for automotive speed. Becomes
  • the voice coil is made of a bobbin-less steel structure, not only is the weight of the bobbin reduced, but also the magnetic material is stronger because the coil wire is located near the outer periphery of the center plate. It will be located at a position where magnetism can be obtained, and the driving force of the voice coil will be higher. It is strengthened and becomes a more efficient speaker.
  • a margin can be given to the amplitude of the diaphragm.
  • the user is directly attached to the outer periphery of the voice coil, and the user is not driven via the voice coil bobbin as in the conventional one, so the propagation efficiency from the voice coil is greatly improved, Extremely effective in improving performance '.
  • the weight can be further reduced, and the overall weight including the speaker grille can be reduced by more than 81%. Also, since the mount discs are practically zero, it can be greatly improved compared to the conventional ones, and this is an extremely favorable form especially for in-vehicle speakers.
  • the punching of the speaker grill with a nonmagnetic metal such as aluminum or a synthetic resin, the magnetic distribution generated from the magnetic circuit becomes uniform, and the performance can be improved. Also, in the case of non-magnetic metal such as aluminum, there is an effect of weight reduction and heat radiation, and further performance improvement can be achieved.

Abstract

On décrit un haut-parleur léger doté d'un rendement et de performances élevés. Dans un haut-parleur classique ou un haut-parleur comprenant un circuit magnétique du type à champ répulsif, une bobine mobile (1) est munie d'un fil complexe A qui contient un conducteur réalisé en un matériau conducteur C, et un matériau magnétique F disposé sur une partie au moins de la surface de ce fil conducteur. Dans une variante, le fil complexe A peut contenir un fil magnétique, réalisé en un matériau magnétique F, et un matériau conducteur C disposé sur une partie au moins de la surface du fil magnétique.
PCT/JP1993/000401 1992-03-31 1993-03-31 Haut-parleur WO1993020666A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2656692 1992-03-31
JP4/26566U 1992-03-31
JP1992088156U JP2592066Y2 (ja) 1992-03-31 1992-11-30 スピーカ
JP4/88156U 1992-11-30

Publications (1)

Publication Number Publication Date
WO1993020666A1 true WO1993020666A1 (fr) 1993-10-14

Family

ID=26364372

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1993/000401 WO1993020666A1 (fr) 1992-03-31 1993-03-31 Haut-parleur

Country Status (4)

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EP (2) EP0587910A4 (fr)
JP (1) JP2592066Y2 (fr)
DE (2) DE835040T1 (fr)
WO (1) WO1993020666A1 (fr)

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EP0971559A3 (fr) * 1993-02-02 2006-08-16 Kabushiki Kaisha Kenwood Haut-parleur

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JPH11275678A (ja) 1998-03-25 1999-10-08 Sony Corp スピーカ装置
US7116796B1 (en) 1999-09-14 2006-10-03 Nanonord A/S Diaphragm transducer
JP4128999B2 (ja) * 2002-04-25 2008-07-30 ピーエスエス・ベルギー・エヌブイ 駆動ユニット、ラウドスピーカ・アセンブリおよびスピーカユニット
CN104038875A (zh) * 2014-07-02 2014-09-10 陈坚胜 一种喇叭
DE102015111527A1 (de) * 2015-07-16 2017-01-19 Lofelt Gmbh Vibrierender Aktor

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JPS52147429U (fr) * 1976-05-06 1977-11-08
JPS60155296U (ja) * 1984-03-27 1985-10-16 パイオニア株式会社 スピ−カのボイスコイル
JPH0198400A (ja) * 1987-09-10 1989-04-17 Daimler Benz Ag 拡声器
JPH0382996U (fr) * 1989-12-11 1991-08-23

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US3351719A (en) * 1964-02-05 1967-11-07 Electronic Res Associates Inc Loudspeaker assembly
GB1276013A (en) * 1968-06-03 1972-06-01 Takashi Sagawa Vibrating device for radiating sound
JPS5753037Y2 (fr) * 1978-11-22 1982-11-17
JPS57168599A (en) * 1981-04-09 1982-10-16 Mitsubishi Electric Corp Bobbinless voice coil
JPS59148500A (ja) * 1983-02-14 1984-08-25 Sony Corp ダイナミツク形スピ−カ
GB2137047A (en) * 1983-03-15 1984-09-26 Donald Maynard Chave Moving coil loudspeakers
JPS6489893A (en) * 1987-09-30 1989-04-05 Matsushita Electric Ind Co Ltd Speaker
DE4130460A1 (de) * 1991-09-13 1993-03-18 Nokia Deutschland Gmbh Elektromagnetischer wandler

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JPS52147429U (fr) * 1976-05-06 1977-11-08
JPS60155296U (ja) * 1984-03-27 1985-10-16 パイオニア株式会社 スピ−カのボイスコイル
JPH0198400A (ja) * 1987-09-10 1989-04-17 Daimler Benz Ag 拡声器
JPH0382996U (fr) * 1989-12-11 1991-08-23

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Title
See also references of EP0587910A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0971559A3 (fr) * 1993-02-02 2006-08-16 Kabushiki Kaisha Kenwood Haut-parleur

Also Published As

Publication number Publication date
EP0835040B1 (fr) 2002-12-11
DE69332569D1 (de) 2003-01-23
EP0587910A1 (fr) 1994-03-23
EP0587910A4 (fr) 1995-01-18
JP2592066Y2 (ja) 1999-03-17
EP0835040A1 (fr) 1998-04-08
JPH0593197U (ja) 1993-12-17
DE835040T1 (de) 1998-09-03
DE69332569T2 (de) 2003-08-21

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