WO2016117665A1 - Voice coil, magnetic circuit, actuator, and universal speaker - Google Patents

Voice coil, magnetic circuit, actuator, and universal speaker Download PDF

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Publication number
WO2016117665A1
WO2016117665A1 PCT/JP2016/051759 JP2016051759W WO2016117665A1 WO 2016117665 A1 WO2016117665 A1 WO 2016117665A1 JP 2016051759 W JP2016051759 W JP 2016051759W WO 2016117665 A1 WO2016117665 A1 WO 2016117665A1
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WO
WIPO (PCT)
Prior art keywords
coil
diaphragm
actuator
plate
voice coil
Prior art date
Application number
PCT/JP2016/051759
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French (fr)
Japanese (ja)
Inventor
佐藤和則
宮原信弘
坂本良雄
Original Assignee
株式会社サウンドファン
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
Priority claimed from JP2015255546A external-priority patent/JP2016140061A/en
Priority claimed from JP2015255545A external-priority patent/JP2016140060A/en
Application filed by 株式会社サウンドファン filed Critical 株式会社サウンドファン
Publication of WO2016117665A1 publication Critical patent/WO2016117665A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/02—Transducers using more than one principle simultaneously
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • 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
    • H04R9/04—Construction, mounting, or centering of coil
    • 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
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to a voice coil, a magnetic circuit, an actuator, and a speaker for audio equipment, and more specifically, a voice coil and a magnetic circuit for an actuator that drive a curved plate-like diaphragm, and the voice coil and a magnetic circuit.
  • the present invention relates to an actuator using a circuit, and a universal speaker using this actuator that can be heard by a hearing-impaired person together with a normal hearing person without wearing a hearing aid.
  • a moving coil type actuator is known as one of driving devices for acoustic equipment.
  • the mainstream is generally configured to drive a conical diaphragm (hereinafter referred to as a “conical diaphragm”).
  • a voice coil is inserted and disposed in a magnetic gap formed by a magnetic circuit, and an electric signal or the like is applied to the voice coil to cause vibration associated with the applied signal.
  • the vibration is transmitted to the connected cone-shaped diaphragm and driven. That is, one end of the voice coil is contained in the magnetic circuit (magnetic field) and the other end is directly connected to the diaphragm, so that the input electrical signal moves the voice coil and the movement is transmitted to the diaphragm. It is converted into acoustic energy (sound).
  • the voice coil 503 is configured by winding a coil wire 532 having a desired diameter around a peripheral end of a cylindrical coil bobbin 531 with a desired number of turns.
  • the magnetic circuit 504 has a shape corresponding to driving the voice coil 503, and the most commonly used structure is a ring-shaped ferrite magnet 541, which is good.
  • the plate 544 is disposed and mounted on the upper surface of the cylindrical ferrite magnet 541, and the disk portion of the yoke 542 including the columnar pole 543 is disposed and mounted on the lower surface of the ferrite magnet 541.
  • the pole 543 and the plate 544 are mounted so that the outer diameter of the pole 543 and the inner diameter of the plate hole 544a are aligned, so that there is a predetermined gap between the outer surface of the pole 543 and the inner surface of the hole 544a at the center of the plate 544.
  • a ring-shaped gap having a width dimension, that is, a gap 505 is formed.
  • the depth dimension of the gap 505 is determined by the thickness dimension of the plate 544. Therefore, the magnetism of the ferrite magnet 541 is guided to the gap 505 by the yoke 542 and the plate 544 and converged, so that a magnetic flux is generated in the gap 505 and a magnetic gap is formed.
  • the voice coil 503 is inserted into a hole (hereinafter referred to as a “neck portion”) 501a of a predetermined size provided in the central portion of the cone-shaped diaphragm 501, and the outer peripheral portion of the coil bobbin 531. Then, an adhesive is applied to the contact portion of the neck portion 501a to be connected and fixed.
  • a hole hereinafter referred to as a “neck portion” 501a of a predetermined size provided in the central portion of the cone-shaped diaphragm 501, and the outer peripheral portion of the coil bobbin 531.
  • the voice coil 503 is disposed at the center of the ring-shaped magnetic gap 505, the voice coil 503 is necessarily in a ring shape, and a coil bobbin 531 for transmitting the movement of the voice coil 503 to the cone-shaped diaphragm 501 is also inevitable. It becomes a thin cylindrical shape.
  • the speaker 500 configured as described above transmits the vibration by transmitting the vibration by driving the cone-shaped diaphragm 501 by the actuator 502 including the voice coil 503 and the magnetic circuit 504.
  • a flat plate diaphragm in which an FRP sheet, a metal sheet or the like is formed in a strip shape and the strip sheet is curved. Some of them are called “diaphragm” to generate vibration and emit sound.
  • a speaker using such a curved diaphragm is known to be able to emit sound that can be heard not only by a normal hearing person but also by a hearing impaired person.
  • a moving coil type actuator having a conventional voice coil and a magnetic circuit, basically, as shown in FIG. 40, at one end 1a of the curved diaphragm 1,
  • the top end portion 503a of the coil bobbin in the voice coil is brought into contact and fixedly coupled, and an electric signal or the like is applied to the voice coil to cause vibration associated with the applied signal.
  • the vibration of the applied signal is transmitted from the top end portion 503a of the coil bobbin through the junction point 510 in the bending direction of the bending vibration plate 1.
  • the voice coil is supported on the magnetic circuit side by a suspension member called a damper, and the magnetic circuit is generally attached to a frame or the like. .
  • the conventional moving coil actuator is not suitable for driving the curved diaphragm because the voice coil and magnetic circuit are large in structure and have a poor space factor.
  • the speaker described in Patent Document 1 is formed in a rectangular flat shape so that the bobbin is fitted into the front half portion (the other end side) of the center yoke.
  • the magnetic circuit forming the magnetic gap in which the voice coil is inserted and disposed has a planar structure, which is more structural than a general voice coil and magnetic circuit used in a speaker having a structure for driving a cone-shaped diaphragm.
  • the actuator can be made thinner.
  • Patent Document 1 since the speaker described in Patent Document 1 also uses a configuration in which a voice coil is driven within the magnetic gap, it is necessary to form the magnetic gap, so that the yoke is made larger than the width of the magnet. There is a need. Therefore, it cannot be said that the structure has been sufficiently reduced in size and weight.
  • the present invention has been made in view of the above circumstances, and is a voice coil, a magnetic circuit, and an actuator having a driving form suitable for a flat diaphragm that forms a curved curved surface portion, and is made thin and small. It is an object of the present invention to provide a technology that can be reduced in weight by reducing the space factor in terms of structure.
  • the present invention provides a speaker having a diaphragm that forms a curved surface portion that is curved, and the actuator is reduced in thickness and size so that the space factor can be improved and the weight can be reduced.
  • An object of the present invention is to provide a technique in which the diaphragm and the actuator have a practical joint strength and the vibration propagation efficiency is improved so that the output in the high frequency region is good.
  • the present invention prevents the sound wave generated on the back side of the diaphragm from interfering with the sound wave generated on the front side of the diaphragm, and controls the acoustic resonance of the sound wave generated on the back side of the diaphragm.
  • the purpose is to provide an easy-to-use technique.
  • a voice coil according to the present invention is a voice coil for an actuator that drives a flat plate-shaped diaphragm, and includes a flat plate-shaped vibration transmission plate and a coil wire rod on one side and the other side of the vibration transmission plate.
  • a flat plate-shaped vibration transmission plate and a coil wire rod on one side and the other side of the vibration transmission plate are formed in a flat and long cylindrical shape, and the coil has a longitudinal direction arranged with a clearance from the surface of the vibration transmission plate.
  • the repulsive magnetic circuit according to the present invention is a magnetic circuit for an actuator that drives a flat diaphragm, and any one of the first to third voice coils can be provided.
  • a pair of hard magnetic members that are spaced apart so as to form a space and are arranged so that one pole sides having the same polarity face each other to form a repulsive magnetic field, and the pair of hard magnetic members
  • a pair of soft magnetic members that are joined to each other to support the pair of hard magnetic members, and the pair of soft magnetic members includes the pair of hard magnetic members.
  • an opening region is arranged so as to be formed in a uniaxial direction.
  • the first actuator according to the present invention is an actuator for an acoustic device that drives a flat plate-shaped diaphragm, and includes a flat plate-shaped vibration transmission plate, and one side and the other side of the vibration transmission plate.
  • Coil coils are alternately wound and formed into a flat cylindrical shape, and the coil includes a voice coil whose longitudinal direction is arranged with a clearance from the surface of the vibration transmission plate, and the voice coil A pair of hard magnetic members that are spaced apart so as to form a space that can be disposed, and arranged so as to form a repulsive magnetic field in the space with one pole side having the same polarity facing each other, And a pair of soft magnetic members disposed on the other pole side so as to sandwich the pair of hard magnetic members and joined to each other to support the pair of hard magnetic members, A pair of hard magnetism A repulsive magnetic circuit arranged so that an opening region is formed in a uniaxial direction in the space formed of a material, and the voice coil includes a pair of hard magnetic
  • the second actuator according to the present invention is the above first actuator, wherein the clearance between the coil in the voice coil and the surface of the vibration transmitting plate is between the coil in the voice coil and the hard magnetic member in the repulsive magnetic circuit. It is larger than the clearance.
  • the third actuator according to the present invention is characterized in that, in the first or second actuator, the winding width of the coil in the voice coil is smaller than the width of the hard magnetic member in the repulsive magnetic circuit. .
  • the voice coil has a size in which the vibration transmitting plate protrudes in one axial direction from the space in the repulsive magnetic circuit. And a support member that elastically holds a part of the protruding region of the vibration transmission plate in two opposing directions.
  • a first universal speaker includes at least a plate-like diaphragm and an actuator that vibrates the diaphragm in response to an input electric signal, and the actuator has a plate-like vibration transmission.
  • a coil and a coil formed by alternately winding a coil wire rod on one surface side and the other surface side of the vibration transmission plate, and forming a flat cylindrical shape, the coil having a longitudinal direction on the surface of the vibration transmission plate And a repulsive magnetic field that is spaced apart from each other so as to form a space in which the voice coil can be disposed, and one pole side having the same polarity is opposed to each other.
  • the pair of soft magnetic members includes a repulsive magnetic circuit arranged so that an opening region is formed in a uniaxial direction in the space formed by the pair of hard magnetic members,
  • the voice coil is disposed in a space formed by the hard magnetic member with a clearance from a pair of hard magnetic members in the repulsive magnetic circuit, and is driven in the same direction as the surface direction of the diaphragm.
  • the vibration transmission plate is joined so that one edge portion of the vibration transmission plate is continuous with the edge portion of the vibration plate, and the vibration plate is directed from the one end side joined to the vibration transmission plate of the actuator toward the opposite other end side. Therefore, it is arranged to form a curved surface portion that is curved.
  • the second universal speaker according to the present invention is characterized in that in the first universal speaker, a housing is further provided that supports both side edges along the driving direction of the diaphragm.
  • the 3rd universal speaker which concerns on this invention is a said 2nd universal speaker WHEREIN:
  • the both-sides edge part of the said diaphragm is supported by the said housing
  • a fourth universal speaker according to the present invention is characterized in that in any one of the first to third universal speakers, a plurality of the actuators are attached to one end side of the diaphragm.
  • the fifth universal speaker according to the present invention is characterized in that, in any of the first to fourth universal speakers, the actuator is further attached to the other end side of the diaphragm. .
  • the sixth universal speaker according to the present invention is the universal speaker according to any one of the first to fifth aspects, wherein the diaphragm further includes an actuator using a piezoelectric body in the curved surface portion.
  • a seventh universal speaker according to the present invention is the fifth or sixth universal speaker further comprising means for dividing the electric signal into several frequency bands, and the divided electric signals are actuators different from each other. It is characterized in that it is input respectively.
  • an eighth universal speaker according to the present invention is the universal speaker according to any one of the first to seventh aspects, wherein the diaphragm has a curved portion whose bending angle is 90 ° to 130 °.
  • a ninth universal speaker according to the present invention is the universal speaker according to any one of the second to eighth aspects, wherein the casing further includes a second speaker unit.
  • a voice coil according to the present invention includes a flat plate-shaped vibration transmission plate, and a coil in which a coil wire is alternately wound around one side and the other side of a vibration transmission plate to form a flat cylindrical shape. It has become. Therefore, the structure is thinned.
  • the coil wound around the vibration transmission plate has a longitudinal direction arranged with a clearance from the surface of the vibration transmission plate. Therefore, when the voice coil is arranged in the magnetic field of the magnetic circuit, the pair of hard magnetic members are controlled to be too close to each other, and the magnetism is effectively used by preventing the magnetic flow from being inclined. The driving efficiency of the voice coil can be improved.
  • a pair of hard magnetic members are separated so as to form a space in which a voice coil can be arranged, and have the same polarity so as to form a repulsive magnetic field in this space. It is arranged so that the surfaces face each other (repel). Further, the pair of soft magnetic members are arranged on the other electrode surface side so as to sandwich the pair of hard magnetic members without forming a magnetic gap, and an opening region is formed in the space in a uniaxial direction. Thus, they are joined to each other in at least one of the uniaxial direction and the orthogonal direction. Therefore, the width of the hard magnetic member and that of the soft magnetic member can be made the same, and the structure can be extremely easily reduced in thickness, size, and weight.
  • the actuator according to the present invention includes the voice coil according to the present invention and the repulsive magnetic circuit according to the present invention, and the coil of the voice coil is arranged in the space with a pair of hard magnetic members and a clearance in the repulsive magnetic circuit. It has been made. Therefore, it is possible to effectively apply the magnetism emitted from the surface of the hard magnetic member to the coil, and it can be made thinner and smaller to improve the space factor and reduce the weight. It can be.
  • the universal speaker according to the present invention can be provided with a voice coil including a coil in which a coil wire is alternately wound on one side and the other side of a flat plate-shaped vibration transmission plate, and the voice coil.
  • a repulsive magnetic circuit including at least a pair of hard magnetic members that are spaced apart so as to form a reciprocal space and that have the same polarity faces to oppose (repel) so as to form a repelling magnetic field in the space.
  • An actuator composed of the following is used. This actuator is joined so that one edge portion of the vibration transmission plate is continuous with the end edge portion of the plate-like vibration plate, and is driven in the same direction as the surface direction of the vibration plate.
  • the diaphragm is arranged so as to form a curved surface portion that curves as it goes from one end side joined to the vibration transmission plate to the other opposite end side. Therefore, it is possible to generate sound waves that can be heard by both the hearing impaired and the normal hearing.
  • the actuator is thinned and miniaturized, the structure is small, the space factor is improved, and the weight can be reduced.
  • the diaphragm and the actuator have a practical joint strength, and the vibration propagation efficiency is improved, so that the output in the high frequency region can be improved.
  • FIG. 3 is a front view of the completed assembly of the magnetic circuit according to the present invention. It is a disassembled perspective view explaining the actuator which concerns on this invention.
  • FIG. 3 is a front view of an assembled actuator according to the present invention.
  • FIG. 1 It is sectional drawing which shows the state which clamps the both sides of a vibration transmission board with a supporting member on both sides of a repulsion-type magnetic circuit in the actuator used for the universal speaker which concerns on this invention. It is a perspective view which shows the other universal speaker which concerns on this invention. It is a center longitudinal cross-section schematic diagram of the universal speaker shown in FIG. It is a perspective view explaining the side plate of the housing in the universal speaker shown in FIG. It is a perspective view explaining the other side plate of the housing in the universal speaker shown in FIG.
  • FIG. 4B is a partial front view of another state in which one end side is gradually narrowed and both upper edge corners on one end side are rounded.
  • FIG. 3 is a front view for explaining a diaphragm transmission plate integrated part in which a curved diaphragm region and a vibration transmission plate region are integrally formed in advance for use in the universal speaker according to the present invention. It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. It is a top view which shows the other universal speaker which concerns on this invention.
  • FIG. 5A is an exploded perspective view and FIG. 5B is an assembled perspective view for explaining a speaker assembled with a cone diaphragm while assembling an actuator with a voice coil and a magnetic circuit of a conventional example. It is a perspective view which shows the state which assembled the speaker with the actuator of the prior art example, and the curved flat diaphragm.
  • the most significant feature of the present invention is the structure of the voice coil 3 that can efficiently transmit vibration to the curved diaphragm 1, and the magnetic force for driving the voice coil 3.
  • the structure of the circuit 4 the structure of the actuator 2 composed of the voice coil 3 and the magnetic circuit 4, and the structure of a speaker (hereinafter referred to as “universal speaker”) 10 using the actuator 2.
  • the universal speaker 10 in the present embodiment can be heard by both the hearing impaired person and the normal hearing person.
  • the universal speaker 10 is configured by including at least a diaphragm 1 having a flat plate shape and an actuator 2 corresponding to efficiently transmitting vibration to the diaphragm in accordance with an input electric signal. Has been.
  • the diaphragm 1 is arranged so as to form a curved surface portion that curves as it goes from one end side joined to the actuator 2 to the other end side.
  • the diaphragm 1 is a flat and thin member such as a film or sheet.
  • paper such as carbon paper, flexible plastic such as polyimide or polyester, wood such as balsa material, aluminum or beryllium, A metal such as boron or a material such as glass can be used.
  • the diaphragm 1 has a substantially rectangular shape in plan view, but is not limited thereto, and may be, for example, a substantially circular shape or a substantially polygonal shape in plan view. Furthermore, the diaphragm 1 is not only shaped so as to have a curved surface portion that is curved in advance, but also capable of forming a curved surface portion that has flexibility and has a tension property. The thickness of the diaphragm 1 is not particularly limited as long as it can be shaped to have a curved surface portion or can be elastically bent and deformed.
  • the actuator 2 is a drive device for an acoustic device that vibrates the diaphragm 1 in accordance with an input (energized) electric signal (audio signal). As shown in FIGS.
  • the magnetic circuit 4 is configured.
  • the voice coil 3 is a voice coil for an actuator that drives the flat diaphragm 1. As shown in FIGS. 3 and 4, the voice coil 3 includes a vibration transmission plate 31 and a coil 32 wound around the vibration transmission plate 31.
  • the vibration transmission plate 31 is a flat core member around which a coil wire is wound. That is, since the voice coil 3 efficiently transmits vibrations to the curved diaphragm, it does not use the cylindrical bobbin form used in the conventional speaker, but uses a bobbin form made of a flat core member. Therefore, the bobbin equivalent member is a planar member that is structurally smaller and thinner than the cylindrical shape.
  • the material of the vibration transmission plate 31 is not particularly limited, and may be a voice coil bobbin material that is widely used in the world.
  • a cloth in which a glass fiber is plain-woven is coated and impregnated with a polyimide resin and thermally cured to form a sheet can be used.
  • the size of the vibration transmission plate 31 is not particularly limited. For example, a sheet having a thickness of 0.2 mm can be cut into a 40 mm square and used as the vibration transmission plate 31.
  • the end connected to the diaphragm 1 is the diaphragm connecting portion 31a, and the opposite end is the coil lead terminal portion 31b.
  • the coil 32 is formed in a flat cylindrical shape in which a coil wire is alternately wound around one side and the other side of the vibration transmission plate 31.
  • the outer shape of the coil 32 can be the oval type (ellipse type) air-core type that is generally called.
  • the coil 32 for example, a coil wire having a diameter of 0.2 mm is used, and the number of turns is set to two layers with one layer 30 turns.
  • the coil 32 is mounted on a 40 mm square vibration transmission plate 31, it is the inner dimension of the coil, but the length in the longitudinal direction is 40 mm ⁇ the length in the short (thickness) direction is 3 mm ⁇ the winding width is 6 mm, and the DC resistance is about 3 .4 ⁇ to 3.5 ⁇ .
  • the vibration transmitting plate 31 is inserted inside (air core portion) as shown by a dotted arrow in FIG.
  • the shape of the coil 32 is an oval (long hole) shape or an oval shape when viewed from a direction orthogonal to the winding direction of the coil wire rod, and the vibration transmitting plate 31 is disposed in the central space of the coil 32.
  • the vibration transmission plate 31 is arranged in a state of extending and exposed in both the winding width directions of the coil 32, and one side (front end portion) of the extended side becomes the vibration plate connecting portion 31a.
  • the vibration transmission plate 31 is formed on the short side inner surface of the coil 32, that is, on the inner surfaces of both ends in the longitudinal direction of the coil 32. It is inserted with both end portions in contact with each other. That is, the pair of opposite sides of the vibration transmission plate 31 are arranged in close contact with the apexes at both ends in the longitudinal direction of the coil 32, so that the coil 32 does not fall off from the vibration plate transmission plate 31 unnecessarily. Yes. Therefore, it is desirable to design the inner dimension of the coil 32 in the longitudinal direction so as to be approximately equal to the length between the pair of opposing sides of the diaphragm transmission plate 31.
  • the coil 32 can secure a sufficient plate thickness dimension to obtain the required strength by obtaining an appropriate dimension on the short region side by a winding jig used in the coil wire winding process. As a result, there is an advantage that the manufacture of the coil on the premise of mass production becomes extremely easy.
  • the vibration transmission plate 31 is inserted and mounted inside the coil 32, the vibration transmission plate 31 and the coil 32 are joined to complete the voice coil 3 for driving the vibration plate. .
  • the coil 32 is arranged with the surface of the vibration transmission plate 31 and clearances (clearances) 33, 33 in the longitudinal direction. That is, the vibration transmission plate 31 is installed on a line passing through the centers of the two R-shaped end portions which are both ends in the longitudinal direction in the oval (oval) air-core type coil 32, whereby the coil 32. Are not directly in contact with the surfaces of the vibration transmission plate 31 on one side and the other side, but are wound apart.
  • a vibration transmission plate 31 having a 40 mm square and a thickness of 0.2 mm is inserted and mounted inside a coil 32 having a length in the longitudinal direction of 40 mm, a length in the short direction of 3 mm, and a winding width of 6 mm
  • the coil The longitudinal direction of 32 is arranged with a coil inner clearance (gap) 33 having a distance dimension of about 1.4 mm.
  • the joining method of the vibration transmission plate 31 and the coil 32 is not particularly limited.
  • the edge portion of the vibration transmission plate 31 and the R-shaped end portion of the coil 32 that is, A heat-resistant adhesive as the filler 34 is applied to the contact (adhesion) portion with the inside (longitudinal ends).
  • the applied heat-resistant adhesive is thermally cured to complete the mounting by bonding the vibration transmission plate 31 and the coil 32.
  • an epoxy adhesive is applied as a heat-resistant adhesive 34 to the contact portion between the vibration transmitting plate 31 and the inside of both ends of the coil 32 in the longitudinal direction, and is thermally cured.
  • the amount of adhesive applied can be, for example, about 0.02 g to 0.04 g per location.
  • the adhesive is not limited to the epoxy type, and any type of adhesive such as an acrylic type adhesive may be used as long as the adhesive is suitable for the purpose.
  • the voice coil 3 has the vibration transmission plate 31 in contact with the inner side of the R-shaped end of the coil 32, and the contact portion between the vibration transmission plate 31 and the coil 32 is connected and fixed by a technique such as adhesion.
  • a technique such as adhesion.
  • the tension of the coil wire to be wound is concentrated on the short side region of the coil 32, and it is constant as a normal circular (round) coil is manufactured. It will not be. Therefore, a uniform tension does not reach the longitudinal direction region of the coil 32, and the tension becomes weaker toward the central portion in the longitudinal direction. Naturally, the tension of the wire material in the longitudinal direction of the coil 32 becomes loose, and the coil 32 The form maintaining ability tends to be more unstable than a general circular (round) coil.
  • the central portion in the longitudinal direction of the oval (oval) coil 32 has a structural character such as being easier to deform or break than a circular (round) coil. Therefore, for the purpose of preventing this character, for example, as shown in FIG. 4, a part of the coil 32 in the longitudinal direction is fixed to the surface of the vibration transmission plate 31 via a heat-resistant adhesive as a filler 34. Desirable.
  • the quality in the longitudinal direction of the coil 32 can be stabilized. Become. Further, since the vibration propagation efficiency as the voice coil 3 is improved and the sound quality can be easily adjusted, the surface of the vibration transmission plate 31 and the longitudinal direction of the coil 32 are taken into consideration while considering the coating weight of the filler 34. A desired amount of the heat-resistant adhesive 34 can be filled and applied in the gap.
  • coil lead wires wires drawn from the winding start end portion 32a and the winding end end portion 32b of the coil wire (hereinafter referred to as “coil lead wires”).
  • the positions of 35a and 35b are set so as to be located in the longitudinal region of the coil 32.
  • the winding start end portion 32a and the winding end end portion 32b of the coil wire material constitute end portions constituting the diaphragm connecting portion 31a. It is desirable that it be disposed on the surface of the vibration transmitting plate 31 so as to be positioned facing the opposite end side, that is, the coil lead wire terminal portion 31b side.
  • the two coil lead wires 35a and 35b extending to the winding start end portion 32a and the winding end end portion 32b are respectively applied to the vicinity of the end side on the coil lead end portion 31b side,
  • the lead wires 35a and 35b and the audio signal input lines 37a and 37b as the tinsel wires are soldered and wired.
  • the interval between the two coil lead wires 35a and 35b can be appropriately adjusted according to the design purpose, and can be set to 16 mm, for example. Also, when an output terminal such as an amplifier board is provided in the vicinity of the soldering wiring, etc., such as making the wiring work with the audio signal input lines 37a and 37b easier to handle in accordance with the pitch width of the output terminal, etc. Is also possible.
  • the position of the solder coat portion 38 where the two coil lead wires 35a and 35b and the audio signal input wires 37a and 37b are soldered is located on the coil lead wire terminal portion 31b side as shown in FIG.
  • the position is not limited to the side edge portion, and may be set to a position inside the side edge portion depending on the thickness of the audio signal input lines 37a and 37b and the size of the solder iron tip, and can be freely set.
  • the insulation layers of the two coil lead wires 35a and 35b are peeled off from the positions of about 15 mm from the winding start end portion 32a and the winding end end portion 32b of the coil wire in the voice coil 32, and solder is applied to the peeling portions. Apply coating.
  • the coil lead wires 35a and 35b are cut to a length of about 60 mm, and covered with rubber adhesives 36 and 36 to a position of about 20 mm from the winding start end portion 32a and the winding end end portion 32b. It is left until 35a, 35b is adhered and fixed to the surface of the vibration transmitting plate 31.
  • the adhesive 36 By applying the adhesive 36, the strength of the winding start end portion 32a and the winding end end portion 32b of the coil wire is increased, and a reinforcing effect in the coil longitudinal direction is also obtained.
  • the end portions of the coil lead wires 35 a and 35 b are arranged in a free state on the surface in the vicinity of the end portion of the vibration transmission plate 31.
  • the audio signal input wires 37a and 37b are arranged on the coil lead wire terminal portion 31b side of the vibration transmission plate 31, and the ends of the coil lead wires 35a and 35b in the free state are connected to the audio signal input wires 37a and 37b. Tangle with the end and solder. After the soldering is completed, excess portions of the coil lead wires 35a and 35b are cut, and a rubber adhesive is applied to the soldered portions to cover them. Then, at the time of applying the adhesive, the adhesive is applied to the remaining exposed portions of the solder coat portions 38 of the coil lead wires 35a and 35b placed on the surface of the vibration transmission plate 31, and all the coil lead wires 35a and 35b are attached. The wiring work is completed by covering and finally attaching the coil lead wires 35a and 35b and the audio signal input wires 37a and 37b to the vibration transmitting plate 31.
  • the application of adhesive to the coil lead wires 35a and 35b may be omitted. Further, instead of applying the adhesive, the coil lead wires 35a and 35b may be covered with an adhesive (adhesive) tape or the like and adhered to the surface of the transmission diaphragm 31.
  • the audio signal input lines (kinshi line) 37a and 37b are round knitting wires generally called by the general public. That is, the audio signal input lines 37a and 37b are braided wires formed by braiding strands with an arbitrary even number, and are wiring materials used between the input terminals of normal speakers and the voice coils.
  • This round braided wire can cope with the violent movement of the voice coil that vibrates, and has an amplitude resistance far superior to that of a general wire. Therefore, even in the universal speaker system of the present invention, the same amplitude resistance performance as that of the conventional speaker can be secured.
  • the coil lead wires 35a and 35b are wound on the surface of the vibration transmission plate 31 of the voice coil 3, and this twisted portion is extended to the coil lead wire terminal portion 31b to be connected to the audio signal input lines 37a and 37b.
  • the reliability of the feeder line against vibration can be ensured.
  • the coil lead wires 35a and 35b and the audio signal input lines 37a and 37b in the direction opposite to the diaphragm connecting portion 31a, that is, the coil lead wire terminal portion 31b side. Wiring work is facilitated and maintainability is improved.
  • the magnetic circuit 4 is a repulsive magnetic circuit for an actuator that drives a flat plate-like diaphragm, and as shown in FIGS. 5 and 6, a pair of hard magnetic members 41A and 41B and a pair of soft magnetic members. Magnetic members 42A and 42B are provided.
  • the hard magnetic members 41 ⁇ / b> A and 41 ⁇ / b> B are separated so as to form a space 43 in which the voice coil 3 can be disposed, and one pole side having the same polarity is opposed to form a repulsive magnetic field in the space 43. It is arranged to do.
  • a magnet having an elongated rectangular shape can be used.
  • a neodymium magnet having a rectangular shape of a heat resistant performance 180 ° C. type having an outer dimension of 40 mm long ⁇ 10 mm wide ⁇ 2 mm thick can be used.
  • the width of the hard magnetic members 41A and 41B is preferably larger than the winding width of the coil 32 in the voice coil 3.
  • the widths of the hard magnetic members 41A and 41B in the repulsive magnetic circuit 4 and the winding width of the coil 32 in the voice coil 3 may be equal, but the winding width of the coil 32 is the same as that of the hard magnetic members 41A and 41A. It should be smaller than the width of 41B. That is, since the width of the hard magnetic members 41A and 41B is larger than the winding width of the coil 32 in the voice coil 3, the voice coil 3 is prevented from protruding from the space 43 in the hard magnetic members 41A and 41B. Can be limited. Thereby, the voice coil 3 can be efficiently and appropriately driven in the space 43 in the hard magnetic members 41A and 41B.
  • the soft magnetic members 42A and 42B are so-called yokes arranged on the other pole face side so as to sandwich the pair of magnets 41A and 41B, and are joined to each other to support the pair of magnets 41A and 41B. . That is, the pair of yokes 42A and 42B supports the pair of magnets 41A and 41B so as to sandwich the pair of magnets 41A and 41B from two directions.
  • the yokes 42A and 42B are, of course, made of an iron material which is a good magnetic material, and in the present embodiment, a magnet mounting having an elongated concave shape formed by cutting the surface in the longitudinal direction.
  • the parts 421A and 421B are provided.
  • the pair of yokes 42A and 42B have the same shape.
  • the outer dimensions are 72 mm long ⁇ 10 mm wide ⁇ 6 mm thick, and the magnet mounting portions 421A and 421B are cut by centering on the surface in the longitudinal direction.
  • a concave flat portion having a length of 42 mm and a width of 10 mm is provided so that the magnets 41A and 41B can be mounted.
  • the thickness of the magnet mounting portions 421A and 421B can be set to 2 mm, for example, when the thickness of the yokes 42A and 42B is 6 mm.
  • the cutting is performed by subjecting both ends of the magnet mounting portions 421A and 421B to curved surface processing with a radius of 3 mm, and further reaching the upper surface at a thickness of 6 mm through a vertical portion of 1 mm from the end of the curved surface processing portion. Also good.
  • the outer dimensions of the yokes 42A and 42B are 72 mm long ⁇ 10 mm wide ⁇ 6 mm thick, and both end portions of the magnet mounting portions 421A and 421B are subjected to curved surface processing of R3 mm, the yokes 42A and 42B At both ends, flat portions 424A and 424B having a length of 12 mm and a width of 10 mm are formed, respectively.
  • the flat portions 424A and 424B are mating surfaces on which the pair of yokes 42A and 42B are combined.
  • the pair of yokes 42A and 42B are arranged such that an opening region is formed in a uniaxial direction in the space 43 formed by the pair of magnets 41A and 41B.
  • This uniaxial direction is the direction in which the voice coil 3 is driven.
  • the pair of magnets are magnetized, and the respective S pole surfaces are mounted so as to be in close contact with the magnet mounting portions 421A and 421B of the yokes 42A and 42B.
  • a method for attaching the magnets 41A and 41B to the yokes 42A and 42B is not particularly limited, and for example, the magnets 41A and 41B can be attached by using an adhesive. Any adhesive can be used as long as it is suitable for the purpose. For example, a two-component mixed epoxy adhesive, an acrylic adhesive, or the like that is generally used by the public may be used. .
  • the S pole surfaces of the magnets 41A and 41B are brought into close contact with the mating surfaces (planar portions) 424A and 424B provided at both ends of the yokes 42A and 42B mounted on the magnet mounting portions 421A and 421B. Then, the magnetic circuit is configured with the N pole surfaces of the magnets 41A and 41B facing each other, and a magnetic circuit using repulsive magnetism, commonly called a repulsive magnetic circuit, generally called the world can be formed. .
  • screw holes (M3 penetration) 425A and 425B corresponding to the respective yokes 42A and 42B are provided, and the yokes 42A and 42B are fastened and combined with mounting screws. .
  • the winding end portion of the coil wire is set to the front, and the coil shape is formed in an oval (long hole) shape or a rectangle,
  • a voice coil 3 having a structure in which a rectangular vibration transmission plate 31 having a predetermined dimension is arranged in the vicinity of the center line of the coil 32 is used.
  • the repulsive magnetic circuit 4 is configured by arranging the polar surfaces of the pair of magnets 41 ⁇ / b> A and 41 ⁇ / b> B to oppose (repel), and a predetermined clearance is provided outside the coil 32 in the longitudinal direction.
  • (Gap) 23 and 23 are provided, and the voice coil 3 is movably disposed in a repulsive magnetic field formed by the pair of magnets 41A and 41B. That is, in the voice coil 3, the coil 32 is arranged in the space 43 with a pair of magnets 41 ⁇ / b> A and 41 ⁇ / b> B and clearances (gap) 23 and 23 in the repulsive magnetic circuit 4.
  • the actuator 2 is an actuator for an acoustic device that drives a flat diaphragm, and includes a voice coil 3 and a repulsive magnetic circuit 4 as shown in FIG.
  • the voice coil 3 is movable within the repulsive magnetic field in the repulsive magnetic circuit 4 without contacting the magnets 41A and 41B.
  • the stable movement without the voice coil 3 coming into contact with the magnets 41A and 41B is maintained, and the curved diaphragm 1 connected through the vibration transmission plate 31 can obtain a normal and stable vibration state.
  • the sound wave which the diaphragm 1 has can be emitted appropriately.
  • the actuator 2 can be made thinner and smaller so that the space factor can be improved and the weight can be reduced.
  • the magnets 41A and 41B bonded to the yokes 42A and 42B are mounted so that the same poles (N poles) face each other to form a repulsive magnetic circuit.
  • the voice coil 3 is disposed in the repulsive magnetic circuit 4, magnetism is emitted from the surfaces of the magnets 41 ⁇ / b> A and 41 ⁇ / b> B toward the vibration transmission plate 31 of the voice coil 3.
  • the magnetic flow from the surfaces (N pole surfaces) of the magnets 41A and 41B is as follows. First, after traversing the longitudinal direction of the coil 32, the direction is changed in the horizontal direction (left and right lateral direction) to both ends of the yokes 42A and 42B, and further, both longitudinal ends of the coil 32 are traversed. Thereafter, the respective yokes 42A and 42B become magnetic paths and go toward the magnet mounting portions 421A and 421B provided at the bottoms of the yokes 42A and 42B, and the magnets 41A and 41B are in close contact with the magnet mounting portions 421A and 421B.
  • the magnetism emitted from the surface of one of the magnets 41A and 41B (N pole surface) into the atmosphere is the path closest to the surface of the opposite pole (S pole surface) that is immediately emitted so as to draw an arc. Since returning, the magnetic distribution in the vertical direction is distributed only at a very short distance (height) from the surface. Therefore, in order to operate the coil 32 efficiently, an installation state as close as possible to the surfaces of the magnets 41A and 41B is preferable.
  • the coil outer clearance 23 formed on the outer side in the longitudinal direction of the coil 32 is set by the thickness of the mating surfaces of the yokes 42A and 42B and the magnet mounting portions 421A and 421B.
  • This clearance can be, for example, 0.2 mm to 0.3 mm including the machining tolerance dimension.
  • the distance between the magnets 41A and 41B facing each other at an appropriate position, and an appropriate gap (coil between the inner side in the longitudinal direction of the coil 32 and the surface of the vibration transmission plate 31 is required. It is preferable to provide an inner clearance 33.
  • the optimum dimension of the coil inner clearance 33 is obtained by analysis such as magnetic analysis, but is preferably larger than the coil outer clearance 23.
  • the repulsive magnetic circuit 4 is preferably a magnetic circuit structure having a structure that can be divided into two parts by a pair of processed parts. This makes it extremely easy to mount the assembly component on the housing side, and has the advantage of enabling mass production.
  • the surface constituting the diaphragm connecting portion 31 a of the vibration transmitting plate 31 and one end 1 a of the curved diaphragm 1 are constructed. Connect and fix the surface first. That is, the surface constituting the diaphragm connecting portion 31a is connected to the surface constituting the one end 1a of the curved diaphragm 1 so that the actuator 2 applies vibration to the curved diaphragm 1.
  • the universal speaker 10 is assembled while assembling the actuator 2 by combining the curved diaphragm 1 with the voice coil 3 and the magnetic circuit 4 and mounting on the magnetic circuit mounting base 21. Can do.
  • the magnetic circuit mounting base 21 can be formed using, for example, a rectangular aluminum plate having a long side of 100 mm, a short side of 70 mm, and a thickness of 6 mm.
  • the magnetic circuit mounting base 21 is not limited to a metal such as aluminum, and any material such as wood or resin may be used.
  • the magnetic circuit mounting base 21 can be one of the components constituting the housing 11, as will be described later. That is, the casing 11 to which the curved diaphragm 1 is attached can be obtained by attaching casing components such as a side plate and a back plate to the magnetic circuit mounting base 21.
  • casing components such as a side plate and a back plate
  • a screw hole is provided on the center line of the plate thickness (wood end) portion on the short side of the magnetic circuit mounting base 21, and a hole is also provided on the side plate at a position corresponding to the screw hole.
  • the side plate is fastened and attached using mounting screws through the holes.
  • Other housing components can also be attached to each other with mounting screws to form the casing 11.
  • the casing parts such as side plates are not limited to metals such as aluminum as long as they are suitable for the purpose.
  • metals such as aluminum as long as they are suitable for the purpose.
  • any material such as wood or resin may be used. It does n’t matter.
  • the curved diaphragm 1 connected to the voice coil 3 is caused to vibrate in accordance with the applied signal by applying an electric signal to the voice coil 3 as indicated by the white arrow.
  • an electric signal to the voice coil 3 As indicated by the white arrow.
  • the electrical signal applied to the voice coil 3 include an audio signal output from a television, a radio, an audio player, a personal computer, a smart device such as a smartphone or a tablet, or the like.
  • the curved diaphragm 1 has a flat plate shape and is arranged so as to form a curved surface portion that curves from the one end 1a side toward the opposite other end 1b side.
  • the curved diaphragm 1 is attached to the actuator 2 so that the curved convex surface faces forward.
  • the curved diaphragm 1 is a flexible member, the diaphragm 1 is elastically bent and deformed from this state after being attached to the voice coil 3 (vibration transmission plate 31) in a standing flat state.
  • a curved surface is formed by the above, and the deformed curved convex surface side is attached to the actuator 2 with the front side facing forward.
  • the curved diaphragm 1 and the vibration transmitting plate 31 are configured separately, and one end 1 a of the curved diaphragm 1 and the diaphragm connecting portion 31 a of the vibration transmitting plate 31. And can be joined.
  • seat 51 adheres so that the junction part of the curved diaphragm 1 and the vibration transmission board 31 may be straddled.
  • the bonded sheet 51 can be formed using, for example, kraft paper having a width of 5 mm and a length of 40 mm.
  • This bonded sheet 51 is not limited to craft paper, but for example, a resin such as FRP, a metal sheet, or a honeycomb plate having a thickness of about 3 mm if it meets the design purpose. It does not matter if it is used.
  • the bonding sheet 51 is used in such a manner that two sheets are bonded to both the front and back surfaces of the joint portion of the curved diaphragm 1 and the vibration transmission plate 31, and is bonded to either one when the design purpose is suitable. As such, only one sheet may be used.
  • connection of the curved diaphragm 1 and the vibration transmission plate 31 can be performed as follows, for example. First, an adhesive is applied to one side of the bonded sheet 51. Next, the connecting portion of the curved diaphragm 1 and the vibration transmitting plate 31 (voice coil 3) is aligned at a predetermined position (for example, center alignment), and the bonding sheet 51 to which the adhesive has been applied is straddled across the center of the alignment portion. After the arrangement, the curved diaphragm 1 and the vibration transmitting plate 31 are pressed against the surfaces.
  • the bonding margin portion is bonded to the surfaces of the curved diaphragm 1 and the vibration transmission plate 31 by 2.5 mm by centering the bonding portion. Will be.
  • the adhesive for adhering the bonding sheet 51 can be, for example, a two-liquid mixed type epoxy adhesive. This epoxy adhesive is applied after a predetermined amount of the main agent and curing agent are mixed well, and the adhesive can be applied using a spatula.
  • the adhesive may be a rubber-based (solvent-based) adhesive or a water-based adhesive in addition to the epoxy-based adhesive.
  • the adhesive is applied to the bonded sheet 51, and then the adhesive is once dried.
  • the connection part of the curved diaphragm 1 and the vibration transmission plate 31 (voice coil 3) is arrange
  • the curved diaphragm 1 and the vibration transmission plate 31 can obtain a good adhesion state by thermal reactivation of the adhesive. This technique has few protruding parts of the adhesive and has a good finished state.
  • thermosetting adhesive such as an epoxy system
  • the curved diaphragm 1 and the vibration transmission plate 31 may be connected. That is, in these methods, it is possible to apply an adhesive to a sheet in advance, cut it into a desired width, and store it in a tape shape.
  • the storage tape can be put into the manufacturing site, and the bonding sheet can be used while being appropriately cut.
  • the bonding sheet can be used while being appropriately cut.
  • the adhesive can be applied to the bonded sheet 51 relatively uniformly, the application to the plate thickness portion of the vibration plate connecting portion 31a of the vibration transmitting plate 31 is uneven because the width of the application portion is narrow. May occur.
  • the adhesive application portion is pressed against the plate thickness portion on the one end 1 a side of the curved diaphragm 1, most of the adhesive protrudes to the surface side of the curved diaphragm 1 and the vibration transmission plate 31. .
  • the bonding sheet 51 as in the present invention, the protruding adhesive is mixed with the adhesive applied to one side of the bonding sheet 51. Therefore, even if it is the plate
  • the bonding sheet 51 it is important that the positional relationship among the curved diaphragm 1, the vibration transmitting plate 31, and the bonding sheet 51 is arranged within a desired accuracy. Therefore, in the bonding operation, for example, a simple positioning jig is prepared, and the bending vibration plate 1, the vibration transmission plate 31, and the bonding sheet 51 to which the adhesive has been applied are installed in the jig. Next, the jig and the jig are pressed with a press or the like in the installed state, and the bonded sheet 51 is pressed against the front and back surfaces of the curved diaphragm 1 and the vibration transmission plate 31. Further, it is left at room temperature for a predetermined time (adhesive curing time).
  • the curved diaphragm 1 and the vibration transmitting plate 31 bonded from the jig are released by applying pressure, the curved diaphragm 1 and the vibration transmitting plate 31 are bonded via the bonding sheet 51. It can be attached.
  • the protrusion part naturally generate
  • the curved curved plate 1 and the vibration transmitting plate 31 can be peeled off from the jig with almost no trouble. Further, even when a jig is made of metal or the like, it is possible to easily remove the adhesive from the jig even if the adhesive protrudes by using a peeling film or the like together.
  • connection mounting strength between the curved diaphragm 1 and the vibration transmission plate 31 is greatly improved, and the conveyance is performed.
  • an effect of improving the yield rate can be obtained.
  • the reliability after completion is greatly improved.
  • one edge of the vibration transmitting plate 31 is the end of the curved diaphragm 1 so as to drive in the same direction as the surface direction of the curved diaphragm 1. It is arranged so as to be continuous with the edge. Therefore, the joining area is greatly increased as compared with the case where a voice coil having a cylindrical shape is used, and a sufficient joining strength can be obtained. Further, the vibration propagation efficiency is improved and the reproduction frequency band is increased, and it can be particularly effective for reproduction on the high frequency band side.
  • the curved diaphragm 1 may be formed separately by the same member (material) as the vibration transmission plate 31, or may be formed separately by a different member (material).
  • the target sound can be easily obtained by using different members, and a sound suitable for each individual can be provided depending on the degree of hearing loss.
  • the integrated parts can be three-dimensionally stacked and arranged in the oven, and the space factor can be improved. Therefore, in the present invention, there is almost no cause for cost increase, and it is possible to reduce man-hours and weight reduction by integration, and it is possible to improve performance by improving sound pressure and the like.
  • the bending angle of the curved surface portion is 90 ° or slightly larger, for example, the bending angle is 90 ° to 130 °.
  • the generated sound pressure is highest in the curved diaphragm 1 having a curved surface portion having a bending angle of 110 ° ⁇ 20 °.
  • the bending angle of the curved surface portion refers to an angle indicated by the intersection of the perpendicular to the one end 1a side of the curved diaphragm 1 and the perpendicular to the other end 1b side.
  • the diaphragm 1 in a planar state is indicated by a dotted line, and the diaphragm 1 curves as it goes from the one end 1 a side to the other end 1 b side, as indicated by a one-dot chain line arrow in the figure.
  • the state of being bent so as to form is shown by a solid line. Therefore, the bending angle of the curved surface portion of the curved diaphragm 1 at this time is indicated by an angle ⁇ at a point O where the perpendicular to the one end 1a and the perpendicular to the other end 1b intersect, and the angle ⁇ is 90 °. Up to 130 ° is desirable.
  • the actuator 2 has a size in which the vibration transmission plate 31 in the voice coil 3 protrudes in the uniaxial direction from the space 43 formed by the pair of magnets 41A and 41B in the repulsive magnetic circuit 4. ing. That is, in the vibration transmission plate 31, the vibration plate connecting portion 31 a side is exposed from one side in the winding width direction of the coil 32.
  • the vibration transmitting plate 31 is 40 mm square and the coil 32 has a winding width of 6 mm
  • the diaphragm connecting portion 31a side is exposed to extend about 10 mm from one side in the winding width direction of the coil 32.
  • the coil lead wire terminal portion 31b side to be arranged is arranged in a state of being exposed and exposed by about 24 mm from the other side in the winding width direction of the coil 32.
  • the actuator 2 has such a size that the vibration transmission plate 31 in the voice coil 3 protrudes in the uniaxial direction from the space 43 formed by the pair of magnets 41A and 41B in the repulsive magnetic circuit 4. Then, as shown in FIG. 13, a desired thickness dimension, a desired width dimension, and a desired length dimension are provided on one end of the vibration transmission plate 31, that is, on the upper surface and the lower surface on the coil lead wire terminal portion 31 b side. It is good also as a structure which arrange
  • the first support members 6 and 6 have a simple structure, the first support members 6 and 6 exhibit a coil support function at the time of amplitude extremely effectively and have a suspension function sufficient to support the voice coil 3.
  • the first support members 6 and 6 are disposed on the upper and lower surfaces of the vibration transmission plate 31 on the coil lead wire terminal portion 31 b side, and further, the vibration transmission plate 31.
  • Second support members 7 and 7 as cushioning materials having desired thickness dimensions, desired width dimensions, and desired length dimensions on the other end, that is, the upper surface and the lower surface on the diaphragm connecting portion 31a side. It is good also as a structure which arranges.
  • the actuator 2 includes the first support members 6 and 6 and the second support members 7 and 7 as cushion materials as suspensions, so that vibrations are generated on both sides of the repulsive magnetic circuit 4.
  • the transmission plate 31 can be elastically sandwiched.
  • a soft material that hardly transmits vibration can be applied, and examples thereof include a highly elastic sheet material such as foamed urethane resin, rubber, and nonwoven fabric.
  • the support members 6 and 7 may have a size of 54 mm length ⁇ 12 mm width ⁇ 8 mm thickness, for example. As described above, if the support members 6 and 7 are provided on both sides of the vibration transmission plate 31 protruding in the uniaxial direction with the repulsive magnetic circuit 4 interposed therebetween, there is an advantage that the support capability of the suspension is further improved.
  • the vibration transmission plate is moved during the amplitude movement of the voice coil 2.
  • Amplitude movement is possible with a dimension 31 less than the dimensions of the clearances 23 and 23 provided between the surfaces of the magnets 41A and 41B in the magnetic circuit.
  • the support member pressing plate 22 may be, for example, an aluminum plate having a thickness of 2 mm and a size of 32 mm width ⁇ 60 mm length.
  • the support member pressing plate 22 For mounting of the support member pressing plate 22 while pressing the support members 6 and 7, for example, holes are provided in the support member pressing plate 22, and screw holes corresponding to these holes are also provided in the yokes 42A and 42B (through M3). 426A and 426B are provided. Then, the supporting member pressing plate 22 is fastened to the top plane of the yoke 42B with the mounting screw 46 and attached.
  • the support member pressing plate 22 Since the support member pressing plate 22 is mounted while pressing the support members 6 and 7, the support members 6 and 7 are compressed to sandwich the vibration transmission plate 31 from both the upper and lower surfaces. Specifically, the design distance between the lower surface of the supporting member pressing plate 22 and the mounting surface of the magnetic circuit mounting base 21 is 12 mm, the thickness of the vibration transmitting plate 31 is 0.2 mm, and the thickness of the supporting members 6 and 7 is 8 mm. If so, the support members 6 and 7 are mounted while being compressed by 2.1 mm. The spring back force generated by the compression sufficiently holds the mounting position of the vibration transmission plate 31 and sufficiently exhibits the suspension function that allows the amplitude motion.
  • the vibration transmission plate 31 is held on the center line (6 mm above) of the space having a dimension of 12 mm while being pushed from above and below by the springback force by the support members 6 and 7.
  • a suspension function that enables the coil 2 to move in amplitude while maintaining the coil outer clearances 23 and 23 (for example, 0.2 mm to 0.3 mm) formed on the surfaces of the coil 32 and the magnets 41A and 41B is provided. It can be obtained with a very inexpensive and simple structure.
  • the support member pressing plate 22 is preferably a heat radiating plate formed of a material having a high heat conductivity and a heat radiating function. Thereby, the heat generated with the driving of the voice coil 3 can be radiated from the surface via the support member pressing plate 22 as a heat radiating plate.
  • a magnetic gap is formed, and a voice coil is arranged in the magnetic gap. Therefore, the space in the direction of amplitude movement of the voice coil is only on the voice coil bobbin side, and the voice coil has a so-called cantilever support structure held in the magnetic gap at a position away from the suspension via the bobbin. . Therefore, when the amplitude of the coil is small, the coil and the magnetic gap are in contact with each other, and an abnormal sound is easily generated.
  • the repulsive magnetic circuit 4 does not constitute a magnetic gap. Therefore, the space 43 in the direction of amplitude movement of the voice coil 3 is released in both directions of the magnetic circuit, that is, in one axis direction, and the support members 6 and 7 can be mounted in the voice coil 3 near the coil 32. It has a simple structure. Therefore, the structure is extremely advantageous in supporting the voice coil 3, and the coil 32 and the magnets 41A and 41B are not in contact with each other during the amplitude movement of the voice coil 3, so that no abnormal sound is generated. Can do.
  • the actuator 2 of the present invention can effectively exert the magnetism emitted from the surfaces of the magnets 41A and 41B on the voice coil 3, and is thinned and miniaturized to have a small space factor due to its structure. It can be improved and can be reduced in weight.
  • the universal speaker 20 may further include a housing 11 that supports both side edges 1 c and 1 c along the driving direction of the curved diaphragm 1. That is, the universal speaker 20 of the present invention can be heard by both the hearing impaired person and the normal hearing person, and includes at least the curved diaphragm 1, the actuator 2, and the housing 11.
  • the housing 11 includes at least a bottom plate 12, a back plate 13, and two left and right side plates 14 and 14.
  • the two side plates 14 and 14 have common dimensions, and as shown in FIG. 17, a vertical side portion 141 located on the back plate 13 side, a horizontal side portion 142 located on the bottom plate 12 side, and a magnetic circuit attachment It has an upper side portion 143 located on the base 21 side. Moreover, the upper side step part 144 that hangs downward from the front side of the upper side part 143 toward the front side of the side part 142, the R part 145 that protrudes in an arc shape from the upper side step part 144 to the front side, and the front side from the R part 145 A lower side step part 146 that protrudes substantially horizontally toward the lower side part 146 and a lower side part 147 that reaches the side part 142 from the lower side step part 146 are formed continuously.
  • the vertical side portion 141 is 230 mm
  • the horizontal side portion 142 is 200 mm
  • the upper side portion 143 is 60 mm
  • the upper side step portion 144 is 12 mm
  • the lower side portion 147 is 20 mm
  • the open angle ⁇ of the R portion 145 is 110 °. It can be.
  • reference numerals 148 and 148 in the figure indicate screw holes.
  • the housing 11 in the present invention is one of the great features that it has an R portion 145, and this R portion 145 becomes a base portion that supports the curved diaphragm 1. That is, in the case structure of the speaker system that generates the sound wave by driving the curved diaphragm 1, a curve formed of a curve corresponding to the curved line included in the curved diaphragm 1 to be mounted at a position where the curved diaphragm 1 is mounted. It is desirable that a processing portion (R portion) 145 is provided and the curved processing portion 145 receives and supports both side edges 1c, 1c of the curved diaphragm 1.
  • the mounting of the curved diaphragm 1 is a basic structure, which is an extremely effective casing structure.
  • both side edges 1 c and 1 c of the curved diaphragm 1 are supported in a curved shape via the left and right side plates 14 of the housing 11.
  • the end surfaces of the side plates 14, 14 provided on the left and right sides of the housing 11 are supported using R portions 145 each formed in an R shape.
  • both side edges 1c and 1c of the standing diaphragm 1 attached to the actuator 2 are easily bent along the upper surface thereof with the R portion 145 as a guide, and are directed from the one end 1a to the opposite other end 1b. Therefore, the curved diaphragm 1 can be arranged to facilitate the formation of a curved surface portion.
  • both side edges 1c and 1c of the curved diaphragm 1 are supported by the housing 11, the possibility that the curved diaphragm 1 is reduced in energy transmission efficiency without being affected by external force or the like is reduced. It will be something that can be made.
  • a material that is soft and difficult to transmit vibration can be applied to the elastic member 8.
  • an elastic member 8 for example, a sheet material having high elasticity such as foamed urethane resin, rubber, nonwoven fabric or the like can be used.
  • the elastic member 8 should just have the length which can be distribute
  • the curved diaphragm 1 has a shape generally adapted to the radius of the elastic member 8.
  • the elastic member 8 can be attached to the surface of the R portion 145 of the side plate 14 by, for example, attaching the double-sided adhesive tape to the surface of the R portion 145 and then attaching the elastic member 8 on the adhesive tape. Can do.
  • the curved diaphragm 1 By supporting the curved diaphragm 1 through the elastic member 8 in this manner, the curved diaphragm 1 vibrates relatively freely, while the reflected wave generated at the side edge 1c portion of the curved diaphragm 1 by the elastic member 8. The function of effectively absorbing is exhibited. Therefore, it is possible to make it difficult for vibration energy of the curved diaphragm 1 to be transmitted to the casing 11, and to reduce energy loss.
  • the universal speaker 20 is formed with a sealed space between the curved diaphragm 1 and the housing 11, so that the sound wave emitted from the front surface (front surface) of the diaphragm and the back surface (rear surface) are output.
  • the sound wave is blocked by the elastic member 8, and the sound wave does not cause interference attenuation on the front surface or the back surface. Therefore, stable sound pressure and wide frequency band characteristics can be obtained, and acoustic resonance of sound waves generated on the back side of the diaphragm can be easily controlled.
  • the elastic member 8 effectively exhibits a suspension function for supporting the curved diaphragm 1 while allowing the vibration of the curved diaphragm 1, and the sound wave emitted to the back side of the curved diaphragm 1.
  • it exhibits a sealing function that prevents it from interfering with sound waves generated on the surface side of the curved diaphragm 1 by going around the surface side of the curved diaphragm 1. Therefore, in this invention, it can be set as the universal speaker 20 which improved the acoustic effect by arrange
  • the elastic member 8 functions to prevent the generation of abnormal noise due to contact between the curved diaphragm 1 and the support surface of the housing 11 (for example, the upper surface of the R portion 145 of the side plate 14).
  • both side edges 1c and 1c of the curved diaphragm 1 are supported by the housing 11 via elastic members 8 and 8 sandwiched from two opposing directions (one side and the other side).
  • the elastic members 8 and 8 having a desired thickness dimension, a desired width dimension, and a desired length dimension are arranged in a state along both the front and back sides of the side edges 1c and 1c of the curved diaphragm 1, It is preferable that the elastic member 8 be a suspension. As a result, the curved diaphragm 1 is reliably supported by the housing 11 via the elastic members 8 and 8.
  • the elastic members 8 and 8 when the elastic members 8 and 8 are mounted along the front and back surfaces of the side edge 1c of the curved diaphragm 1, an appropriate pressure is applied to the elastic member 8 from the direction in which the curved diaphragm 1 is sandwiched. It is preferable to add. That is, in the present invention, the elastic members 8 and 8 are brought into close contact with each other along both the front and back sides of the side edges 1c and 1c of the curved diaphragm 1, and the elastic member 8 is slightly in the direction of the R portion 145 of the side plate 14. It is preferable that the curved diaphragm 1 be supported by applying pressure to the curved diaphragm 1.
  • the elastic member 8 When the elastic member 8 is mounted while being compressed with an appropriate pressure in this way, the springback force of the elastic member 8 generated by the compression sufficiently holds the mounting position of the curved diaphragm 1 and has an amplitude.
  • the curved diaphragm 1 can be mounted on the housing 11 while having a suspension function that allows movement.
  • the elastic member 8 applies a constant pressing force to both surfaces of the vibration transmission plate 31 of the voice coil 3, can exhibit a more stable holding ability, and the function as a suspension for the voice coil is extremely improved. The effect to do can also be produced.
  • the compressive force of the elastic member 8 has a sufficient holding force to prevent deviation from the mounting position while giving a degree of freedom sufficient for the curved diaphragm 1 to vibrate.
  • the elastic member 8 since the elastic member 8 is compressed, it also has a sealing effect for preventing sound leakage generated on the back surface side of the curved diaphragm 11.
  • the elastic member 8 is shown as an elongated rod-shaped member having a rectangular cross section, and two elastic members 8 are stacked so as to cover the upper surface of the R portion 145 formed on the side plate 14 of the housing 11. It is arranged. Further, the outer side (side edge 1 c) of the curved diaphragm 1 is shown as having the front and back surfaces supported by elastic members 8, 8. Therefore, the side edge 1c of the curved diaphragm 1 is sandwiched between the two elastic members 8 and 8, and a sealed space between the curved diaphragm 1 and the housing 11 is formed.
  • the elastic member 8 in the suspension structure of the present invention only cuts the foam block without using a hot-pressure molding method or the like like the suspension generally used as an edge or the like used in a conventional speaker. Is available at Therefore, the elastic member 8 can be easily manufactured, and there is an advantage that a molding die is not required. As a result, it can be said that the suspension structure can be obtained at a low cost and is very effective for cost reduction.
  • the presser sheet 9 is, for example, an elongated belt-like body having a length that can be bridged between the upper side portion 143 and the lower side portion 147 of the side plate 14, and has one end at the upper side portion 143 of the side plate 14 and the other end. Are fixed to the lower side portion 147 of the side plate 14 with screws or the like. Accordingly, the presser sheet 9 can support both side edges 1 c and 1 c of the curved diaphragm 1 while pressing the elastic member 8, and can apply a certain pressure to the elastic member 8.
  • a polypropylene sheet material having an elongated strip shape can be used for the presser sheet 9.
  • the housing 11 is provided with an opening 15 between the other end 1b of the curved diaphragm 1 and the bottom plate 12, for releasing sound generated in the housing 11 to the outside.
  • the opening 15 may be provided in one direction even if it is not provided depending on the design purpose.
  • the universal speaker 20 in the present embodiment As shown in FIG. 16, after the actuator 2 is installed in the housing 11, an appropriate looseness corresponding to the drive amplitude of the voice coil 3 (vibration transmission plate 31) is provided. Forming is performed on the audio signal input line 37 (37a, 37b). Further, the end of the audio signal input line 37 is guided and passed through the notch 16 provided in the magnetic circuit mounting base 21. Then, the audio signal input line 37 is applied to the output terminal of the speaker system driving amplifier board 17 mounted on the back plate 13 side of the housing 11, and is connected and wired by soldering.
  • the side edge 1c of the curved diaphragm 1 when the side edge 1c of the curved diaphragm 1 is supported using the upper surface of the R portion 145 of the side plate 14, for example, as shown in FIG.
  • a large number of conical, triangular pyramid, and hemispherical edge support members 18 called insulators may be arranged on the upper surface of the R portion 145, and the curved diaphragm 1 may be supported by the edge support member 18 partially in point contact. good.
  • the edge support member 18 can be made of, for example, an elastic material such as rubber, or a hard material such as wood, stone, or metal.
  • edge support members 18 are shown as having a conical shape, and 17 edge support members 18 are arranged at equal intervals so as to protrude from the upper surface of the R portion 145 of the side plate 14 of the housing 11. Yes.
  • the number of edge support members 18 is not particularly limited, and can be appropriately arranged.
  • the curved diaphragm 1 is supported by the housing 11 via the edge support member 18, so that the curved diaphragm 1 vibrates relatively freely, while the edge support member 18 generates vibration energy of the curved diaphragm 1. Absorbing or escaping, it is difficult for vibration to be transmitted to the casing 11, and energy loss can be reduced.
  • the edge support member 18 is directly attached to the side plate 14 so as to protrude inward from the side plate 14 of the housing 11. It is good as a thing.
  • the edge support member 18 is not limited to a conical shape, a triangular pyramid shape, or a hemispherical shape, but may be a cylindrical shape.
  • the edge support member 18 is not limited to the R portion 145 of the side plate 14, and as will be described later, the upper surface of the guide spot facing portion 171 formed on the side plate 14, the upper and lower surfaces in the guide concave portion 172, and the guide convex portion 173. It is good also as what is arrange
  • the curved diaphragm 1 may be gradually narrowed toward the one end 1a. That is, when the connecting portion between the curved diaphragm 1 and the vibration transmitting plate 31 is formed in a right angle, a standing wave is likely to be generated by a reflected wave from the vicinity of the support member 7. However, as shown in FIG. 19, by forming the connecting portion between the curved diaphragm 1 and the vibration transmitting plate 31 in a linearly continuous shape, it is possible to prevent the occurrence of standing waves and improve the sound quality.
  • the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side. Therefore, a part of the curved diaphragm 1B that is gradually narrowed linearly is shown.
  • the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side.
  • a part of the curved diaphragm 1C gradually narrowing in a curved shape as it goes is shown.
  • the one end 1 a side of the curved diaphragm 1 is not gradually narrowed, but gradually, as the diaphragm connecting portion 31 a side of the vibration transmitting plate 31 moves toward the one end 1 a side of the curved diaphragm 1.
  • the connecting portion between the curved diaphragm 1 and the vibration transmitting plate 31 may be linearly continuous.
  • the curved diaphragm 1 may have rounded upper corners on both sides on one end side. That is, if the corner 1d of the curved diaphragm 1 is a straight point, a standing wave is likely to be generated by a reflected wave from the vicinity of the support member 7. However, as shown in FIG. 20, when the upper edge corner 1d of the curved diaphragm 1 is rounded, the generation of standing waves can be further prevented and the sound quality can be improved.
  • the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side. Therefore, a part of the curved diaphragm 1D is shown in which the width gradually decreases linearly, and the upper edge corners 1d of both side edges 1c, 1c are rounded.
  • the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side.
  • a part of the curved diaphragm 1E is shown in which the width gradually decreases in a curved line and the upper edge corners 1d of both side edges 1c and 1c are rounded.
  • the curved diaphragm 1 and the vibration transmission plate 31 are not integrated by using the bonding sheet 51, and the curved vibration plate 1 and the vibration transmission plate 31 are integrally formed in advance by the same member. (Hereinafter referred to as “diaphragm transmission plate integrated part”). As a result, further improvement in performance and reliability can be exhibited, and a great effect can be achieved in reducing the number of man-hours for connection work in the connection portion.
  • the curved diaphragm 1 region and the vibration transmission plate 31 region are integrally formed in advance, and the curved diaphragm 1 region has a curved shape as the distance between both side edges 1c, 1c is directed toward the vibration transmission plate 31 region.
  • a diaphragm transmission plate integrated part 131 is shown in which the width gradually decreases and the upper edge corners 1d of both side edges 1c, 1c are rounded.
  • the thickness portion of the side plate 14 of the housing 11 and the kerf portion referred to in terms of woodworking industry are subjected to curving, but for example, it is assumed that the housing 11 is frequently used.
  • the curved machining portion corresponding to the curved diaphragm 1 may be processed in a straight shape, such as a counterbore or a groove, as will be described later. Absent. Moreover, these processes can be easily performed by router processing and have the effect of being inexpensive.
  • both side edges 1c and 1c of the curved diaphragm 1 are not limited to the R portion 145 formed on the front side edge of the left and right side plates 14 of the casing 11, but for example, as shown in FIG. 11 and the left and right side plates 14 may be supported by using curved guide counterbore portions 171 provided on the inner surfaces thereof.
  • the side edges 1c and 1c of the curved diaphragm 1 are supported by being easily bent along the upper surface of the guide counterbore part 171. Therefore, the curved diaphragm 1 curves toward the other end 1b facing from the one end 1a. It is possible to easily form the curved surface portion.
  • the elastic member 8 is arranged on the guide counterbore part 171 and the both side edges 1 c and 1 c of the curved diaphragm 1 are supported via the elastic member 8, the curved diaphragm 1 is fixed to the housing 11.
  • the elastic member 8 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 11, and the loss of energy can be reduced.
  • both side edges 1c and 1c of the curved diaphragm 1 are supported by using curved guide recesses 172 provided on the inner surfaces of the left and right side plates 14 of the housing 11, for example, as shown in FIG. It is good as well.
  • the side edges 1c and 1c of the curved diaphragm 1 are easily bent and supported by being inserted into the guide recess 172, so that a curved surface portion that is curved from the one end 1a toward the other end 1b is formed. Can be made easy.
  • the curved diaphragm 1 can vibrate relatively freely without being fixed to the casing 11, but the vibration energy of the curved diaphragm 1 is hardly transmitted to the casing 11 by the guide recess 172, and the energy loss is small. It can be.
  • both side edges 1c and 1c of the curved diaphragm 1 are supported by using curved guide convex portions 173 provided on the inner surfaces of the left and right side plates 14 of the housing 11, for example, as shown in FIG. It may be good.
  • the side edges 1c and 1c of the curved diaphragm 1 are supported by being easily bent along the upper surface of the guide convex portion 173, so that the curved diaphragm 1 curves as it goes from the one end 1a to the opposite other end 1b.
  • the curved surface portion can be easily formed.
  • the elastic member 8 is disposed on the upper surface of the guide convex portion 173 and the both side edges 1 c and 1 c of the curved diaphragm 1 are supported via the elastic member 8, the curved diaphragm 1 is attached to the housing 11. While it can vibrate relatively freely without being fixed, the elastic member 8 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 11, and the loss of energy can be reduced.
  • a curved baffle corresponding to the curved diaphragm 1 is produced, and the casing 11 is configured by including this baffle. May be.
  • the baffle has an advantage that the material of the baffle can be properly used according to the purpose, such as woodworking technology, resin molding technology, metal press technology, or the like. Therefore, both side edges 1c and 1c of the curved diaphragm 1 may be supported by using the curved guide frame portion 174 provided so as to span the inner surfaces of the left and right side plates 14 of the housing 11. .
  • the side edges 1c and 1c of the curved diaphragm 1 are supported by being easily bent along the upper surface of the guide frame portion 174, so that the curved diaphragm 1 bends from the one end 1a toward the opposite other end 1b.
  • the curved surface portion can be easily formed.
  • the elastic member 8 is disposed on the upper surface of the both side edges of the guide frame portion 174 and the both side edges 1c and 1c of the curved diaphragm 1 are supported via the elastic member 8, the curved diaphragm 1 is mounted on the housing. Although it can vibrate relatively freely without being fixed to the body 11, the elastic member 8 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 11, and the loss of energy can be reduced.
  • the universal speaker of the present invention may have a plurality of actuators 2 attached to one end side of the curved diaphragm 1. That is, as shown in FIG. 26, a universal speaker 30 having a structure in which two actuators 2 are attached to the curved diaphragm 1 can be obtained.
  • the two actuators 2 and 2 are both fixedly attached to the magnetic circuit mounting base 21, and the curved vibration plate 1 has the edge portions of the vibration transmission plates 31 of the two actuators 2 and 2. , 31 are shown as being arranged to be joined.
  • the end of the audio signal input line 37 passes through the notch 16 provided in the magnetic circuit mounting base 21 and is output from the amplifier base 17 for driving the speaker system mounted on the back plate 13 side of the housing 11. It is connected to the terminal.
  • Such an all-purpose speaker 30 drives the end surface of the same curved diaphragm 1 by two actuators 2 and 2, so that one actuator 2 drives upper limit sound energy by a plurality of actuators 2 and 2.
  • larger shear waves and dense waves can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.
  • the universal speaker of the present invention may further include another actuator 2 attached to the other end side of the curved diaphragm 1. That is, as shown in FIG. 27, the first actuator 2A is attached to one end edge of the curved diaphragm 1, and the second actuator 2B is attached to the other end edge.
  • the universal speaker 40 can be used.
  • the first actuator 2A and the second actuator 2B are both the actuator 2 of the present invention described above, or one of them is a known moving coil type actuator or moving magnet type actuator. Or you can do it.
  • the universal speaker 40 has the first actuator 2A fixed and attached to the back plate 13 side of the housing 11, while the second actuator 2B is fixed and attached to the bottom plate 12 side of the housing 11. Shown as a thing.
  • the curved diaphragm 1 has one edge joined to the vibration transmission plate 31 of the first actuator 2A and the other edge joined to the vibration transmission plate 31 of the second actuator 2B. It has become.
  • the universal speaker 40 further includes means 19 for dividing the electric signal into several frequency bands, and the divided electric signals are respectively input to different actuators. Also good. That is, as shown by white arrows in FIG. 27, the band of a single audio signal input to the two actuators 2A and 2B is divided into two frequency bands by an audio signal dividing device 19 such as an analog or electronic filter. To divide.
  • one of the outputs is input to the first actuator 2A via the first audio signal input line 37, and the other output is input to the second actuator 2B via the second audio signal input line 57.
  • one curved diaphragm 1 is driven by the two actuators 2A and 2B, and shear waves and dense waves having different reproduction bands on one end side and the other end side of the curved diaphragm 1 can be obtained at the same time. In particular, shear waves and coarse waves with a wide reproduction band can be obtained.
  • an actuator using a piezoelectric body may be further provided on the curved surface portion of the curved diaphragm 1. That is, as shown in FIG. 28, the first actuator 2 according to the present invention is attached to one end 1 a of the curved diaphragm 1, and a second material using a piezoelectric body is used for the curved surface portion of the curved diaphragm 1. It can be set as the universal speaker 50 which has the structure where the actuator 52 was further attached.
  • the second actuator 52 is shown as being attached to the central rear surface of the curved surface portion of the curved diaphragm 1.
  • This second actuator 52 is not limited to the central back surface of the curved surface portion of the curved diaphragm 1, and is attached to the central surface of the curved surface portion of the curved diaphragm 1 as long as there is no problem with wiring for inputting audio signals. Also good.
  • the piezoelectric body is a substance having a piezoelectric effect that deforms itself in proportion to the pressure when a pressure is applied
  • the actuator is a piezoelectric element that uses the piezoelectric effect to convert the applied voltage into a force.
  • the piezoelectric element expands and contracts (vibrates) in one direction when a voltage is applied. Therefore, as shown in FIG. 28, the first actuator 2 according to the present invention is attached to one end 1 a of the curved diaphragm 1, and the second actuator using a piezoelectric material for the curved surface portion of the curved diaphragm 1. It can be set as the universal speaker 50 which has the structure where 52 was affixed.
  • the piezoelectric element 52 can be made of ceramics, a polymer such as PVDF (polyvinylidene fluoride), a composite of ceramics and a polymer, or the like.
  • Such a universal speaker 50 drives the end face and the curved surface of the curved diaphragm 1 with different actuators 2 and 52, respectively, so that a single actuator drives a sounding energy having an upper limit with a plurality of actuators 2 and 52, Larger shear waves and dense waves can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.
  • the universal speaker 50 further includes means 19 for dividing the electric signal into several frequency bands, and the divided electric signals are respectively input to different actuators. Also good. That is, as with the above-described universal speaker 40, as indicated by the white arrows in FIG. 29, the band of a single audio signal input to the two actuators 2 and 52 is divided into audio signals such as analog or electronic filters.
  • the device 19 divides the frequency band into two frequency bands.
  • one of the outputs is input to the first actuator 2 via the first audio signal input line 37, and the other of the outputs is input to the second actuator 52 via the second audio signal input line 57.
  • one curved diaphragm 1 is driven by the two actuators 2 and 52, and shear waves and dense waves in different reproduction bands are obtained simultaneously on one end side and the other end side of the curved diaphragm 1, and the whole is obtained.
  • shear waves and coarse waves with a wide reproduction band can be obtained.
  • the second actuator 52 using a piezoelectric body is not limited to the center of the curved surface portion of the curved diaphragm 1 as described above, but as shown in FIGS.
  • the first actuator 2 according to the present invention is attached to the one end 1a, and the second actuator 52 using a piezoelectric body is further attached to the vicinity of the other end 1b side of the curved surface portion of the curved diaphragm 1.
  • the universal speaker 60 can be used.
  • the second actuator 52 is shown as being attached to the back surface of the curved diaphragm 1 on the other end 1b side.
  • a single audio signal band input to the two actuators 2, 52 is divided into two frequency bands by the audio signal dividing device 19, and one of the outputs is sent through the first audio signal input line 37. It is shown that the signal is input to one actuator 2 and the other output is input to the second actuator 52 via the second audio signal input line 57.
  • the second actuator 52 is not limited to the back surface of the curved diaphragm 1 on the curved surface other end 1b side, and is not provided on the curved surface other end 1b surface of the curved diaphragm 1 if there is no problem with wiring for inputting an audio signal. It may be affixed.
  • this second actuator is not limited to one for the curved surface portion of the curved diaphragm, for example, it is attached to the center of the curved surface portion and the other end of the curved surface portion of the curved diaphragm, etc. Two or more may be attached.
  • the second actuator 52 is shown as a rectangular (striped) piezoelectric element, but may be a round piezoelectric element. Thereby, design changes, such as the attachment position to the curved diaphragm 1 and the number of attachments, can be made as appropriate.
  • the universal speaker according to the present invention has an actuator that is thin and small in size, has a small structure, has improved space factor, and can be reduced in weight, and a diaphragm and an actuator are practical. Therefore, it is possible to improve the vibration propagation efficiency and improve the output in the high frequency range.
  • a hybrid universal speaker 70 further including a second speaker unit 120 may be used. That is, the speaker unit 110 (hereinafter referred to as “first speaker unit”) 110 that emits sound by driving the curved diaphragm 1 in the same direction as the surface direction by the actuator 2 is used by both the hearing impaired and the normal hearing. Although a sound wave that can be heard can be generated, in view of the reproduction band and sound quality, a situation with a clear sense of loss (dissatisfaction) may occur in a normal hearing person.
  • a speaker unit incorporated in a general audio device is used as a second speaker unit 120, and the first speaker unit 110 is further provided. It is assumed that it is incorporated in (added to) the housing 11. Therefore, the first speaker unit 110 mainly functions as a speaker unit that emits sound for a hearing impaired person, and the second speaker unit 120 mainly functions as a speaker unit that emits sound for a normal hearing person. It can be said that.
  • the second speaker unit 120 is a speaker unit capable of wide-band reproduction that satisfies the high-quality sound quality of a normal hearing person in terms of sound quality, and examples thereof include an electrodynamic speaker unit.
  • a desirable electrodynamic speaker unit for example, a dynamic speaker unit can be cited.
  • a desirable dynamic type speaker unit for example, a cone type speaker unit can be cited.
  • the mounting position of the second speaker unit (for example, dynamic cone type speaker) is not particularly limited, and the bottom plate 12, the back plate 13, and the side plate 14 may be any positions excluding the front opening where the curved diaphragm is disposed. Any of these may be used.
  • the second speaker unit 120 is shown as being attached to the bottom plate 12 of the housing 11. Further, the interior of the housing 11 is partitioned by partition walls so as to form acoustic cavities in the first speaker unit 110 and the second speaker unit 120, respectively.
  • the hybrid type universal speaker 70 is one that divides a sound range and reproduces it by each speaker unit, that is, to each speaker unit so that an audio signal is reproduced for each specific frequency. It is not applied and reproduced, but the same audio signal simply divided by the distributor 59 is applied to each speaker unit.
  • the speaker unit ie, the first speaker unit
  • the electrodynamic or piezoelectric speaker unit ie, the second speaker unit
  • the universality of the speaker can be improved, and a speaker that can be heard by both a hearing impaired person and a normal hearing person can be provided.
  • a conductive vibration speaker unit in which the actuator of the first speaker unit 110 is replaced with a moving magnet type or moving coil type actuator 82 as shown in FIG. 33, for example.
  • a piezoelectric vibration speaker unit may be used instead of the actuator 92 using a piezoelectric body.
  • the moving magnet type actuator has a configuration in which a voice coil is arranged on the inner wall surface of a cylindrical cup-shaped yoke and a columnar pole piece with a magnet (permanent magnet) provided inside thereof.
  • the first speaker unit transmits the kinetic energy as the reciprocating motion of the magnet (pole piece) by applying the electric signal to the curved diaphragm through the diaphragm driving unit provided on the top of the pole piece.
  • a sound is generated by applying a vibration parallel to the surface direction of the curved diaphragm.
  • the moving coil type actuator is provided with a cylindrical pole piece at the center of the disk-shaped yoke, and a ring-shaped magnet (permanent magnet) on the yoke so that the pole piece is at the center.
  • a disc-shaped plate with a hole in the center is placed on top of it, and a cylindrical voice coil is placed in a ring-shaped gap formed between the outer surface of the pole piece and the inner surface of the hole in the plate. It is set as a configuration.
  • the first speaker unit transmits the kinetic energy as the reciprocating motion of the voice coil by the application of the electric signal to the curved diaphragm through the diaphragm driving unit provided on the upper part of the voice coil, and the curved vibration.
  • a sound is generated by applying a vibration parallel to the surface direction of the plate.
  • the hybrid type universal speaker 80 in this case has, for example, a first speaker unit 110, a second speaker unit 120, and a hollow structure that houses the first speaker unit 110 and the second speaker unit 120. And at least a housing 11. Moreover, this housing
  • the actuator 82 abuts against the edge of the diaphragm 1 and is fixedly attached to the housing 11 so as to be driven in the same direction as the surface direction of the flat diaphragm 1. Further, the plate-like diaphragm 1 is arranged so as to form a curved surface portion that curves from one end side to which the actuator 82 is attached to the opposite other end side, and covers the opening of the housing 11. In addition, both side edges are supported by the casing 11, and the second speaker unit 120 is fixedly attached to one surface excluding the opening of the casing 11.
  • an actuator using a piezoelectric body is a plate-like piezoelectric element using a piezoelectric effect that converts an applied voltage into force, and expands and contracts (vibrates) in one direction when a voltage is applied.
  • This piezoelectric element can be made of ceramics, a polymer such as PVDF (polyvinylidene fluoride), a composite of ceramics and polymer, or the like.
  • the first speaker unit in this case has a structure in which a piezoelectric element is attached to one edge of the curved diaphragm, and kinetic energy due to the change of the piezoelectric element is efficiently transmitted to the curved diaphragm. Then, a sound is generated by applying a vibration parallel to the surface direction of the curved diaphragm.
  • the hybrid type universal speaker 90 in this case has, for example, a first speaker unit 110, a second speaker unit 120, and a hollow structure that accommodates the first speaker unit 110 and the second speaker unit 120. And at least a housing 11.
  • the casing 11 has an opening on one surface, and the first speaker unit 110 uses a flat plate-like diaphragm 1 and a piezoelectric body that vibrates the diaphragm 1 in accordance with an input electric signal.
  • the actuator 92 is provided at least.
  • the actuator 92 is affixed to the surface on one end side of the diaphragm 1 so as to be driven in the same direction as the surface direction of the flat diaphragm 1.
  • the plate-like diaphragm 1 is arranged so as to form a curved surface portion that curves from one end side to which the actuator 92 is attached toward the other opposite end side, and covers the opening of the housing 11.
  • both side edges are supported by the casing 11, and the second speaker unit 120 is fixedly attached to one surface excluding the opening of the casing 11.
  • the second speaker unit 120 is also attached to the hybrid universal speaker 80 having the moving magnet type or moving coil type actuator 82 and the hybrid universal speaker 90 having the actuator 92 using a piezoelectric material.
  • the position is not particularly limited, and may be any position except the front opening where the curved diaphragm 1 is disposed.
  • the second speaker unit 120 is shown as being attached to the bottom plate portion 12 of the housing 11. Further, the interior of the housing 11 is partitioned by partition walls so as to form acoustic cavities in the first speaker unit 110 and the second speaker unit 120, respectively.
  • the first speaker unit may be configured using a PVDF film as a curved diaphragm, and may be mounted on the housing surface so as to form a slight back cavity.
  • the PVDF film used as the curved diaphragm has a surface and a back surface coated with a conductive material using a conductive polymer, and has an electrode for supplying power to the conductive material on the outer side.
  • voice signal input is wired in the PVDF film edge part, and is electrically connected with the electrode.
  • This electrode can be provided with a width of about 5 mm by a silk printing method using, for example, a conductive adhesive called a conductive paste or a silver paste.
  • the hybrid type universal speaker in this case has, for example, a first speaker unit, a second speaker unit, and a hollow structure that houses (attaches) the first speaker unit and the second speaker unit.
  • the first speaker unit is a diaphragm made of a PVDF film, and is provided on the surface of the housing with a back cavity so as to form a curved surface portion that is curved, and a peripheral portion is provided on the housing. It has been supported.
  • the second speaker unit is fixedly attached to one surface excluding the part of the housing to which the PVDF film (diaphragm) is attached.
  • the speaker unit that is, the first speaker unit
  • the electrodynamic or piezoelectric speaker unit that is, the second speaker unit
  • the voice coil is not a plate in which the vibration transmission plate has a rectangular plate shape, but is a flat plate in which the width of the vibration transmission plate on the vibration plate connecting portion side and the width on the coil lead wire terminal portion side are different. It may be a non-rectangular shape.
  • the coil is wound around a vibration transmission plate having a rectangular plate shape in which the width on the vibration plate connecting portion side of the vibration transmission plate in the voice coil and the width on the coil lead wire terminal portion side are equal.
  • the width of the coil becomes larger than the width on the diaphragm connecting portion side and the width on the coil lead wire terminal portion side. Then, the coil protrudes from the side edge portion of the vibration transmission plate, and care must be taken in handling the voice coil. In addition, the coil may fall off from the diaphragm connecting portion side or the coil lead wire terminal portion side of the vibration transmitting plate.
  • the width W1 on the side (that is, the diaphragm connecting portion 31a side) to be disposed in the space 43 in the repulsive magnetic circuit 4 is set to be the repulsive magnetic circuit 4.
  • Is a vibration transmission plate 31 smaller than the width W2 on the side exposed from the space 43 (that is, the coil lead wire terminal portion 31b side), and the winding width W3 of the coil 32 wound on the diaphragm connection portion 31a side is
  • the voice coil 103 has a size equal to or smaller than the width W2 on the coil lead wire terminal portion 31b side.
  • the voice coil 103 is formed such that the width W1 on the diaphragm connecting portion 31a side of the vibration transmitting plate 31 is smaller than the width W2 on the coil lead terminal portion 31b side (W1 ⁇ W2), and It is assumed that the width W3 of the coil 32 is equal to or smaller than the width W2 on the coil lead wire terminal portion 31b side (W3 ⁇ W2).
  • the coil 32 wound around the vibration transmission plate 31 is prevented from protruding from the side edge of the vibration transmission plate 31. Therefore, the relationship between the width W1 on the vibration plate connecting portion 31a side, the width W2 on the coil lead wire terminal portion 31b side, and the width W3 of the coil 32 in the vibration transmitting plate 31 is W1 ⁇ W3 ⁇ W2.
  • the coil 32 is prevented from protruding from the side edge of the vibration transmission plate 31, and the side of the vibration transmission plate 31 such as when the voice coil 103 is packed or transported or installed in the repulsive magnetic circuit 4 is eliminated. It is possible to reduce the possibility that the coil 32 portion at the edge portion is damaged due to impact or the like. Moreover, the possibility that the coil 32 may fall off from the coil lead wire terminal portion 31b side of the vibration transmission plate 31 can be eliminated.
  • the vibration transmission plate 31 is narrowed by providing a slight step at the side edge portion.
  • the vibration transmission plate 31 is not limited to this, but is not illustrated. It is good also as a substantially taper shape which becomes narrow gradually as the side edge part of a board goes to the diaphragm connection part side from the coil lead wire terminal part side.
  • the voice coil has a shape in which the width of the vibration transmission plate on the vibration plate connecting portion side and the width on the coil lead wire terminal portion side are the same, the side edge portion of the vibration transmission plate The width of the coil winding portion of the vibration transmission plate may be reduced so that the coil does not protrude from the coil.
  • the width W4 on the side (that is, the diaphragm connecting portion 31a side) to be disposed in the space 43 in the repulsive magnetic circuit 4, and the space in the repulsive magnetic circuit 4 43, the width W5 on the exposed side (ie, the coil lead wire terminal portion 31b side) is the same, and the coil is formed by providing the notch 115 on one or both side edges of the coil winding equivalent portion.
  • the vibration transmission plate 31 has a reduced width W6 corresponding to the winding portion, and the winding width W7 of the coil 32 wound around the coil winding equivalent portion includes the width W4 on the vibration plate connecting portion 31a side and the coil lead wire terminal.
  • the voice coil 113 has a size equal to or smaller than the width W5 on the part 31b side.
  • the width W4 on the diaphragm connecting portion 31a side and the width W5 on the coil lead wire terminal portion 31b side are formed to be smaller (W6 ⁇ W4, W5), and the width W7 of the coil 32 is the diaphragm connecting portion.
  • the width W4 on the 31a side and the width W5 on the coil lead wire terminal portion 31b side are equal to or smaller than (W7 ⁇ W4, W5).
  • the coil 32 wound around the vibration transmission plate 31 is prevented from protruding from the side edge of the vibration transmission plate 31. Therefore, the relationship among the width W4 on the vibration plate connecting portion 31a side, the width W5 on the coil lead wire terminal portion 31b side, the width W6 of the coil winding equivalent portion, and the width W7 of the coil 32 in the vibration transmitting plate 31 is W6 ⁇ W7. ⁇ W4, W5.
  • the width W4 of the vibration transmission plate 31 on the vibration plate connecting portion 31a side is equal to or larger than the width W7 of the coil 32.
  • the coil 32 cannot be mounted. However, if the width of the vibration transmission plate 31 is reduced by bending the vibration transmission plate 31, the vibration transmission plate 31 (diaphragm connection portion 31a side) can be inserted into the coil 32, and the coil 32 can be easily attached. Will be able to.
  • the depth of the notch 115 in the vibration transmission plate 31 is not particularly limited as long as the coil wire is caught.

Abstract

[Problem] To reduce the thickness and size and obtain favorable output of a high-frequency band in a universal speaker provided with a vibration plate that forms a curved surface part that is curved. [Solution] This universal speaker 10 is provided with at least a planar vibration plate 1 and an actuator 2 that causes the vibration plate to vibrate in response to an input electric signal. The actuator is configured by: a voice coil 3 equipped with a planar vibration transmission plate and a coil obtained by winding a coil wire alternately on one side and the other side of the vibration transmission plate; and a repulsion type magnetic circuit 4 in which a pair of hard magnetic members are arranged away from each other so as to form a space in which the voice coil can be disposed. The voice coil is disposed inside the space such that the coil forms a clearance with the pair of hard magnetic members in the repulsion type magnetic circuit, and the voice coil is joined in such a way that one edge part of the vibration transmission plate is connected to an end edge part of the vibration plate so as to be driven in the same direction as the plane direction of the vibration plate.

Description

ボイスコイル、磁気回路、アクチュエータ、並びに万能スピーカVoice coil, magnetic circuit, actuator, and universal speaker
　本願発明は、音響機器用のボイスコイル、磁気回路、アクチュエータ、並びにスピーカに係り、詳しくは、湾曲させた平板状の振動板を駆動するアクチュエータ用のボイスコイルと磁気回路、及びこれらボイスコイルと磁気回路を用いたアクチュエータ、並びにこのアクチュエータを用いた、難聴者が補聴器をつけることなく健聴者と共に聞き取ることができる万能スピーカに関する。 The present invention relates to a voice coil, a magnetic circuit, an actuator, and a speaker for audio equipment, and more specifically, a voice coil and a magnetic circuit for an actuator that drive a curved plate-like diaphragm, and the voice coil and a magnetic circuit. The present invention relates to an actuator using a circuit, and a universal speaker using this actuator that can be heard by a hearing-impaired person together with a normal hearing person without wearing a hearing aid.
　音響機器用の駆動装置の一つとして、ムービングコイル型のアクチュエータが知られている。その主流は、円錐状をした振動板（以下、「コーン状振動板」と記す。）を駆動する構造が一般的である。このようなムービングコイル型アクチュエータは、磁気回路が構成する磁気ギャップ中にボイスコイルを挿入配置し、このボイスコイルに電気信号等を印加することで印加信号に伴った振動を起し、ボイスコイルと接続されたコーン状振動板に振動を伝達して駆動するものとなっている。すなわち、ボイスコイルの一端は磁気回路（磁界）の中に収まっており、他端は振動板に直結されていることから、入力された電気信号がボイスコイルを動かし、その動きが振動板に伝わって音響エネルギー（音）に変換されるものとなる。 A moving coil type actuator is known as one of driving devices for acoustic equipment. The mainstream is generally configured to drive a conical diaphragm (hereinafter referred to as a “conical diaphragm”). In such a moving coil type actuator, a voice coil is inserted and disposed in a magnetic gap formed by a magnetic circuit, and an electric signal or the like is applied to the voice coil to cause vibration associated with the applied signal. The vibration is transmitted to the connected cone-shaped diaphragm and driven. That is, one end of the voice coil is contained in the magnetic circuit (magnetic field) and the other end is directly connected to the diaphragm, so that the input electrical signal moves the voice coil and the movement is transmitted to the diaphragm. It is converted into acoustic energy (sound).
　具体的には、たとえば、図３７に示すように、ボイスコイル５０３は、円筒状をしたコイルボビン５３１の外周端部に、所望径のコイル線材５３２を所望のターン数にて巻き付けることにより構成される。
　一方、図３８に示すように、磁気回路５０４は、ボイスコイル５０３を駆動するのに対応した形状になっており、最も多用されている一般的な構造は、リング形状のフェライトマグネット５４１と、良好な磁性材たる鉄材からなる円板の中央部に所定寸法直径の穴５４４ａを設けたプレート５４４と、同じく鉄材からなる円板の中央部に円柱状の凸部（以下、「ポール」と記す）５４３を設けたヨーク５４２等の磁気回路部品で構成されている。 Specifically, for example, as shown in FIG. 37, the voice coil 503 is configured by winding a coil wire 532 having a desired diameter around a peripheral end of a cylindrical coil bobbin 531 with a desired number of turns. .
On the other hand, as shown in FIG. 38, the magnetic circuit 504 has a shape corresponding to driving the voice coil 503, and the most commonly used structure is a ring-shaped ferrite magnet 541, which is good. A plate 544 provided with a hole 544a having a diameter of a predetermined size in the center of a disc made of iron, which is a magnetic material, and a cylindrical convex portion (hereinafter referred to as "pole") in the center of the disc made of iron. It is composed of magnetic circuit components such as a yoke 542 provided with 543.
　磁気ギャップは、円筒状をしたフェライトマグネット５４１の上面にプレート５４４が配置装着されると共に、フェライトマグネット５４１の下面に、円柱状をしたポール５４３を備えるヨーク５４２の円板部が配置装着されることで形成される。すなわち、ポール５４３とプレート５４４は、ポール５４３の外径及びプレート穴５４４ａの内径が芯合わせして装着されるため、ポール５４３の外面とプレート５４４の中央部の穴５４４ａ内面との間に、所定幅寸法を有したリング状の隙間、即ちギャップ５０５が構成される。また、ギャップ５０５の奥行き方向の寸法は、プレート５４４の厚さ寸法にて決定される。ゆえに、フェライトマグネット５４１が有する磁気が、ヨーク５４２及びプレート５４４によってギャップ５０５に導かれ、収束されるため、該ギャップ５０５に磁束が発生し、磁気ギャップが構成されることとなる。 As for the magnetic gap, the plate 544 is disposed and mounted on the upper surface of the cylindrical ferrite magnet 541, and the disk portion of the yoke 542 including the columnar pole 543 is disposed and mounted on the lower surface of the ferrite magnet 541. Formed with. That is, the pole 543 and the plate 544 are mounted so that the outer diameter of the pole 543 and the inner diameter of the plate hole 544a are aligned, so that there is a predetermined gap between the outer surface of the pole 543 and the inner surface of the hole 544a at the center of the plate 544. A ring-shaped gap having a width dimension, that is, a gap 505 is formed. The depth dimension of the gap 505 is determined by the thickness dimension of the plate 544. Therefore, the magnetism of the ferrite magnet 541 is guided to the gap 505 by the yoke 542 and the plate 544 and converged, so that a magnetic flux is generated in the gap 505 and a magnetic gap is formed.
　このボイスコイル５０３は、図３９に示すように、コーン状振動板５０１の中心部に設けられた所定寸法の穴（以下、「ネック部」と記す。）５０１ａ内に挿入され、コイルボビン５３１外周部とネック部５０１ａの接触部分に接着剤を塗布して接続固定される。 As shown in FIG. 39, the voice coil 503 is inserted into a hole (hereinafter referred to as a “neck portion”) 501a of a predetermined size provided in the central portion of the cone-shaped diaphragm 501, and the outer peripheral portion of the coil bobbin 531. Then, an adhesive is applied to the contact portion of the neck portion 501a to be connected and fixed.
　したがって、リング状磁気ギャップ５０５の中心にボイスコイル５０３が配置されるため、ボイスコイル５０３は必然的にリング形状となり、該ボイスコイル５０３の動きをコーン状振動板５０１に伝達せしめるコイルボビン５３１も必然的に薄い円筒状になる。このように構成されたスピーカ５００は、ボイスコイル５０３と磁気回路５０４とから構成されたクチュエータ５０２によってコーン状振動板５０１を駆動して振動を伝達し放音する。 Therefore, since the voice coil 503 is disposed at the center of the ring-shaped magnetic gap 505, the voice coil 503 is necessarily in a ring shape, and a coil bobbin 531 for transmitting the movement of the voice coil 503 to the cone-shaped diaphragm 501 is also inevitable. It becomes a thin cylindrical shape. The speaker 500 configured as described above transmits the vibration by transmitting the vibration by driving the cone-shaped diaphragm 501 by the actuator 502 including the voice coil 503 and the magnetic circuit 504.
　このようなムービングコイル型のアクチュエータを用いたスピーカシステムにおいては、ＦＲＰシートや金属シート等を短冊状に形成し、尚且つ、この短冊状シートを湾曲させた平板状の振動板（以下、「湾曲振動板」という。）を駆動して振動を起し、放音するようにしたものもある。このような湾曲振動板を用いたスピーカは、健聴者は勿論のこと、難聴者も聴くことのできる放音を成し得るものとして知られている。 In a speaker system using such a moving coil type actuator, a flat plate diaphragm (hereinafter referred to as “curved”) in which an FRP sheet, a metal sheet or the like is formed in a strip shape and the strip sheet is curved. Some of them are called “diaphragm” to generate vibration and emit sound. A speaker using such a curved diaphragm is known to be able to emit sound that can be heard not only by a normal hearing person but also by a hearing impaired person.
　そして、湾曲振動板を湾曲方向に沿って振動させる場合、従来型のボイスコイル及び磁気回路を備えるムービングコイル型アクチュエータでは、基本的に図４０に示すように、湾曲振動板１の一端１ａに、ボイスコイルにおけるコイルボビンの頂端部５０３ａを接触せしめ固定結合し、ボイスコイルに電気信号等を引加して印加信号に伴った振動を起す。そうすると、コイルボビンの頂端部５０３ａから接合点５１０を介して湾曲振動板１の湾曲方向に印加信号の振動を伝達することとなる。尚、図においては省いて記載しているが、ボイスコイルは、ダンパと称されるサスペンジョン部材によって磁気回路側に支えられており、磁気回路はフレーム等に付随しているのが一般的である。 When the curved diaphragm is vibrated along the bending direction, in a moving coil type actuator having a conventional voice coil and a magnetic circuit, basically, as shown in FIG. 40, at one end 1a of the curved diaphragm 1, The top end portion 503a of the coil bobbin in the voice coil is brought into contact and fixedly coupled, and an electric signal or the like is applied to the voice coil to cause vibration associated with the applied signal. Then, the vibration of the applied signal is transmitted from the top end portion 503a of the coil bobbin through the junction point 510 in the bending direction of the bending vibration plate 1. Although not shown in the figure, the voice coil is supported on the magnetic circuit side by a suspension member called a damper, and the magnetic circuit is generally attached to a frame or the like. .
　ところが、従来のムービングコイル型アクチュエータは、ボイスコイル及び磁気回路が構造上大きく、スペースファクターが悪いものとなるため、湾曲振動板を駆動するに適した形状であるとは言い難い。また、コイルボビンの頂端部と湾曲振動板との接合点が２ヶ所しかなく、接合面積が極端に小さいものとなってしまい、接合強度が不足すると共に、振動伝搬効率が大いに劣るものとなってしまう。 However, the conventional moving coil actuator is not suitable for driving the curved diaphragm because the voice coil and magnetic circuit are large in structure and have a poor space factor. In addition, there are only two joint points between the top end of the coil bobbin and the curved diaphragm, so that the joint area becomes extremely small, the joint strength is insufficient, and the vibration propagation efficiency is greatly degraded. .
　湾曲振動板を駆動することで放音するようにしたスピーカとしては、次のような構造をしたものか提案されている。まず、軟鉄材より成るセンターヨーク（プレート）の後半部分（一端側）を両側から挟み込むように２個のマグネットを同極で対向設置する。また、この両マグネットの他極側にそれぞれ、センターヨークを挟み込むように軟鉄材より成る２枚の外側ヨークを配設する。これによって、センターヨークと外側ヨークとの間に磁気ギャップを形成するようにした磁気回路を構成する。そして、この磁気ギャップ中にボイスコイルを挿入配置し、このボイスコイルと連結された振動板を振動させるようにしたものとなっている（たとえば、特許文献１、２を参照）。 As a speaker that emits sound by driving a curved diaphragm, it has been proposed whether it has the following structure. First, two magnets are installed opposite to each other with the same pole so as to sandwich the latter half (one end side) of the center yoke (plate) made of soft iron material from both sides. In addition, two outer yokes made of a soft iron material are disposed on the other pole side of both magnets so as to sandwich the center yoke. Thus, a magnetic circuit is formed in which a magnetic gap is formed between the center yoke and the outer yoke. A voice coil is inserted into the magnetic gap and a diaphragm connected to the voice coil is vibrated (see, for example, Patent Documents 1 and 2).
　上記特許文献１に記載されたスピーカでは、ボビンがセンターヨークの前半部分（他端側）に嵌挿されるように角形扁平状に形成されたものである。そのため、ボイスコイルが挿入配置される磁気ギャップを形成する磁気回路は平面的な構造となり、コーン状振動板を駆動する構造のスピーカにおいて用いられる一般的なボイスコイル及び磁気回路に比して、構造上薄厚化されたアクチュエータとすることができる。 The speaker described in Patent Document 1 is formed in a rectangular flat shape so that the bobbin is fitted into the front half portion (the other end side) of the center yoke. For this reason, the magnetic circuit forming the magnetic gap in which the voice coil is inserted and disposed has a planar structure, which is more structural than a general voice coil and magnetic circuit used in a speaker having a structure for driving a cone-shaped diaphragm. The actuator can be made thinner.
　しかしながら、上記特許文献１に記載されたスピーカにおいても、磁気ギャップ内でボイスコイルを駆動する構成を用いるものであるため、磁気ギャップを形成する必要上、マグネットの幅に比してヨークを大きくする必要がある。ゆえに、構造上十分に小型化・軽量化されたものとは未だいえない。 However, since the speaker described in Patent Document 1 also uses a configuration in which a voice coil is driven within the magnetic gap, it is necessary to form the magnetic gap, so that the yoke is made larger than the width of the magnet. There is a need. Therefore, it cannot be said that the structure has been sufficiently reduced in size and weight.
　さらに、湾曲振動板の微細振幅運動（振動）を許容しつつ、湾曲振動板が駆動することで裏面側に発した音波が、湾曲振動板の表面側に回り込んで表側で発生した音波と干渉してしまうことを防ぐ必要がある。 In addition, while allowing the micro-amplitude motion (vibration) of the curved diaphragm, sound waves generated on the back side by driving the curved diaphragm wrap around the surface side of the curved diaphragm and interfere with sound waves generated on the front side. It is necessary to prevent this from happening.
特公平７－３８７５８号公報Japanese Patent Publication No. 7-38758 特開昭６２－７３８９８号公報JP-A-62-73898
　本発明は、上記事情に鑑みて成されたものであり、湾曲した曲面部を形成する平板状振動板に適した駆動形態を有するボイスコイル、磁気回路、及びアクチュエータであって、薄厚化・小型化されて構造上小さくスペースファクターが改善され、かつ、軽量化することを可能とした技術を提供することを目的とする。 The present invention has been made in view of the above circumstances, and is a voice coil, a magnetic circuit, and an actuator having a driving form suitable for a flat diaphragm that forms a curved curved surface portion, and is made thin and small. It is an object of the present invention to provide a technology that can be reduced in weight by reducing the space factor in terms of structure.
　また、本発明は、湾曲する曲面部を形成する振動板を備えたスピーカにおいて、アクチュエータが薄厚化・小型化されて構造上小さくスペースファクターが改善され、かつ、軽量化することを可能とすると共に、振動板とアクチュエータとが実用的な接合強度を有し、振動伝搬効率を向上させることで、高周波域の出力が良好なものとした技術を提供することを目的とする。 In addition, the present invention provides a speaker having a diaphragm that forms a curved surface portion that is curved, and the actuator is reduced in thickness and size so that the space factor can be improved and the weight can be reduced. An object of the present invention is to provide a technique in which the diaphragm and the actuator have a practical joint strength and the vibration propagation efficiency is improved so that the output in the high frequency region is good.
　さらに、本発明は、振動板の裏面側に発した音波が振動板の表面側に発生した音波と干渉することを防ぎ、尚且つ、振動板の裏面側に発生する音波の音響共振を制御し易いものとした技術を提供することを目的とする。 Furthermore, the present invention prevents the sound wave generated on the back side of the diaphragm from interfering with the sound wave generated on the front side of the diaphragm, and controls the acoustic resonance of the sound wave generated on the back side of the diaphragm. The purpose is to provide an easy-to-use technique.
　本発明に係るボイスコイルは、平板状をした振動板を駆動するアクチュエータ用のボイスコイルであって、平板状をした振動伝達板と、この振動伝達板の一面側と他面側とにコイル線材が交互に巻回される、扁平長円筒状に形成されたコイルとを備え、前記コイルは、長手方向が前記振動伝達板の表面とクリアランスをもって配されていることを特徴とする。 A voice coil according to the present invention is a voice coil for an actuator that drives a flat plate-shaped diaphragm, and includes a flat plate-shaped vibration transmission plate and a coil wire rod on one side and the other side of the vibration transmission plate. Are formed in a flat and long cylindrical shape, and the coil has a longitudinal direction arranged with a clearance from the surface of the vibration transmission plate.
　また、本発明に係る反発型磁気回路は、平板状をした振動板を駆動するアクチュエータ用の磁気回路であって、上記第一から第三までの何れかのボイスコイルを配することが可能な空間を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して前記空間内に反発磁界を形成するように配された一対の硬磁性部材と、前記一対の硬磁性部材を挟持するように他極面側にそれぞれ配され、互いに接合されて前記一対の硬磁性部材を支持する一対の軟磁性部材とを備え、前記一対の軟磁性部材は、前記一対の硬磁性部材によって形成された前記空間において一軸方向に開口領域が形成されるように配されていることを特徴とする。 The repulsive magnetic circuit according to the present invention is a magnetic circuit for an actuator that drives a flat diaphragm, and any one of the first to third voice coils can be provided. A pair of hard magnetic members that are spaced apart so as to form a space and are arranged so that one pole sides having the same polarity face each other to form a repulsive magnetic field, and the pair of hard magnetic members And a pair of soft magnetic members that are joined to each other to support the pair of hard magnetic members, and the pair of soft magnetic members includes the pair of hard magnetic members. In the space formed by the above, an opening region is arranged so as to be formed in a uniaxial direction.
　また、本発明に係る第一のアクチュエータは、平板状をした振動板を駆動する音響機器用のアクチュエータであって、平板状をした振動伝達板、及び該振動伝達板の一面側と他面側とにコイル線材が交互に巻回され、扁平長円筒状に形成されたコイルを備え、該コイルは、長手方向が前記振動伝達板の表面とクリアランスをもって配されているボイスコイルと、前記ボイスコイルを配することが可能な空間を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して前記空間内に反発磁界を形成するように配された一対の硬磁性部材、及び該一対の硬磁性部材を挟持するように他極側にそれぞれ配され、互いに接合されて前記一対の硬磁性部材を支持する一対の軟磁性部材を備え、前記一対の軟磁性部材は、前記一対の硬磁性部材によって形成された前記空間において一軸方向に開口領域が形成されるように配されている反発型磁気回路とから構成され、前記ボイスコイルは、コイルが前記反発型磁気回路における一対の硬磁性部材とクリアランスをもって前記硬磁性部材が形成する空間内に配されていることを特徴とする。 The first actuator according to the present invention is an actuator for an acoustic device that drives a flat plate-shaped diaphragm, and includes a flat plate-shaped vibration transmission plate, and one side and the other side of the vibration transmission plate. Coil coils are alternately wound and formed into a flat cylindrical shape, and the coil includes a voice coil whose longitudinal direction is arranged with a clearance from the surface of the vibration transmission plate, and the voice coil A pair of hard magnetic members that are spaced apart so as to form a space that can be disposed, and arranged so as to form a repulsive magnetic field in the space with one pole side having the same polarity facing each other, And a pair of soft magnetic members disposed on the other pole side so as to sandwich the pair of hard magnetic members and joined to each other to support the pair of hard magnetic members, A pair of hard magnetism A repulsive magnetic circuit arranged so that an opening region is formed in a uniaxial direction in the space formed of a material, and the voice coil includes a pair of hard magnetic members in the repulsive magnetic circuit It is characterized by being arranged in a space formed by the hard magnetic member with a clearance.
　本発明に係る第二のアクチュエータは、上記第一のアクチュエータにおいて、前記ボイスコイルにおけるコイルと振動伝達板の表面とのクリアランスは、前記ボイスコイルにおけるコイルと前記反発型磁気回路における硬磁性部材とのクリアランスより大であることを特徴とする。 The second actuator according to the present invention is the above first actuator, wherein the clearance between the coil in the voice coil and the surface of the vibration transmitting plate is between the coil in the voice coil and the hard magnetic member in the repulsive magnetic circuit. It is larger than the clearance.
　本発明に係る第三のアクチュエータは、上記第一又は第二のアクチュエータにおいて、前記ボイスコイルにおけるコイルの巻き幅は、前記反発型磁気回路における硬磁性部材の幅より小であることを特徴とする。 The third actuator according to the present invention is characterized in that, in the first or second actuator, the winding width of the coil in the voice coil is smaller than the width of the hard magnetic member in the repulsive magnetic circuit. .
　本発明に係る第四のアクチュエータは、上記第一から第三までの何れかのアクチュエータにおいて、前記ボイスコイルは、振動伝達板が、前記反発型磁気回路における前記空間より一軸方向にはみ出る大きさを有し、前記振動伝達板のはみ出た領域の一部を対向する二方向より弾性的に挟持する支持部材をさらに備えることを特徴とする。 In a fourth actuator according to the present invention, in any one of the first to third actuators, the voice coil has a size in which the vibration transmitting plate protrudes in one axial direction from the space in the repulsive magnetic circuit. And a support member that elastically holds a part of the protruding region of the vibration transmission plate in two opposing directions.
　本発明に係る第一の万能スピーカは、平板状をした振動板と、入力された電気信号に応じて前記振動板を振動させるアクチュエータと、を少なくとも備え、前記アクチュエータは、平板状をした振動伝達板、及び該振動伝達板の一面側と他面側とにコイル線材が交互に巻回され、扁平長円筒状に形成されたコイルを備え、該コイルは、長手方向が前記振動伝達板の表面とクリアランスをもって配されているボイスコイルと、前記ボイスコイルを配することが可能な空間を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して前記空間内に反発磁界を形成するように配された一対の硬磁性部材、及び該一対の硬磁性部材を挟持するように他極側にそれぞれ配され、互いに接合されて前記一対の硬磁性部材を支持する一対の軟磁性部材を備え、前記一対の軟磁性部材は、前記一対の硬磁性部材によって形成された前記空間において一軸方向に開口領域が形成されるように配されている反発型磁気回路とから構成され、前記ボイスコイルは、コイルが前記反発型磁気回路における一対の硬磁性部材とクリアランスをもって前記硬磁性部材が形成する空間内に配されていると共に、前記振動板の面方向と同じ方向に駆動するように振動伝達板の一縁部が前記振動板の端縁部と連続するように接合され、前記振動板は、前記アクチュエータの振動伝達板と接合された一端側から対向する他端側へ向かうにしたがって湾曲する曲面部を形成するように配されていることを特徴とする。 A first universal speaker according to the present invention includes at least a plate-like diaphragm and an actuator that vibrates the diaphragm in response to an input electric signal, and the actuator has a plate-like vibration transmission. A coil and a coil formed by alternately winding a coil wire rod on one surface side and the other surface side of the vibration transmission plate, and forming a flat cylindrical shape, the coil having a longitudinal direction on the surface of the vibration transmission plate And a repulsive magnetic field that is spaced apart from each other so as to form a space in which the voice coil can be disposed, and one pole side having the same polarity is opposed to each other. A pair of hard magnetic members arranged so as to form a pair, and a pair of soft magnetic members arranged on the other pole side so as to sandwich the pair of hard magnetic members and bonded to each other to support the pair of hard magnetic members The pair of soft magnetic members includes a repulsive magnetic circuit arranged so that an opening region is formed in a uniaxial direction in the space formed by the pair of hard magnetic members, The voice coil is disposed in a space formed by the hard magnetic member with a clearance from a pair of hard magnetic members in the repulsive magnetic circuit, and is driven in the same direction as the surface direction of the diaphragm. The vibration transmission plate is joined so that one edge portion of the vibration transmission plate is continuous with the edge portion of the vibration plate, and the vibration plate is directed from the one end side joined to the vibration transmission plate of the actuator toward the opposite other end side. Therefore, it is arranged to form a curved surface portion that is curved.
　また、本発明に係る第二の万能スピーカは、上記第一の万能スピーカにおいて、前記振動板の駆動方向に沿う両側縁部を支持する筐体をさらに備えることを特徴とする。 Further, the second universal speaker according to the present invention is characterized in that in the first universal speaker, a housing is further provided that supports both side edges along the driving direction of the diaphragm.
　また、本発明に係る第三の万能スピーカは、上記第二の万能スピーカにおいて、前記振動板の両側縁部は、対向する二方向より挟持する弾性部材を介して前記筐体に支持されていることを特徴とする。 Moreover, the 3rd universal speaker which concerns on this invention is a said 2nd universal speaker WHEREIN: The both-sides edge part of the said diaphragm is supported by the said housing | casing via the elastic member clamped from two opposing directions. It is characterized by that.
　また、本発明に係る第四の万能スピーカは、上記第一から第三までの何れかの万能スピーカにおいて、前記振動板の一端側に前記アクチュエータが複数取り付けられていることを特徴とする。 Also, a fourth universal speaker according to the present invention is characterized in that in any one of the first to third universal speakers, a plurality of the actuators are attached to one end side of the diaphragm.
　また、本発明に係る第五の万能スピーカは、上記第一から第四までの何れかの万能スピーカにおいて、前記振動板の他端側にもさらに前記アクチュエータが取り付けられていることを特徴とする。 The fifth universal speaker according to the present invention is characterized in that, in any of the first to fourth universal speakers, the actuator is further attached to the other end side of the diaphragm. .
　また、本発明に係る第六の万能スピーカは、上記第一から第五までの何れかの万能スピーカにおいて、前記振動板は、前記曲面部に圧電体を利用したアクチュエータをさらに備えていることを特徴とする。 The sixth universal speaker according to the present invention is the universal speaker according to any one of the first to fifth aspects, wherein the diaphragm further includes an actuator using a piezoelectric body in the curved surface portion. Features.
　また、本発明に係る第七の万能スピーカは、上記第五又は第六の万能スピーカにおいて、前記電気信号を幾つかの周波数帯域に分割する手段をさらに備え、分割した各電気信号を互いに異なるアクチュエータにそれぞれ入力することを特徴とする。 Further, a seventh universal speaker according to the present invention is the fifth or sixth universal speaker further comprising means for dividing the electric signal into several frequency bands, and the divided electric signals are actuators different from each other. It is characterized in that it is input respectively.
　また、本発明に係る第八の万能スピーカは、上記第一から第七までの何れかの万能スピーカにおいて、前記振動板は、曲面部の曲げ角度が９０°から１３０°までであることを特徴とする。 Further, an eighth universal speaker according to the present invention is the universal speaker according to any one of the first to seventh aspects, wherein the diaphragm has a curved portion whose bending angle is 90 ° to 130 °. And
　さらに、本発明に係る第九の万能スピーカは、上記第二から第八までの何れかの万能スピーカにおいて、前記筐体は、第二のスピーカユニットをさらに備えていることを特徴とする。
発明の効果 Furthermore, a ninth universal speaker according to the present invention is the universal speaker according to any one of the second to eighth aspects, wherein the casing further includes a second speaker unit.
The invention's effect
　本発明に係るボイスコイルは、平板状をした振動伝達板と、コイル線材が振動伝達板の一面側と他面側とに交互に巻回され扁平長円筒状に形成されたコイルを備えたものとなっている。ゆえに、構造上薄厚化されたものとなる。
　また、振動伝達板に巻回されたコイルは、長手方向が前記振動伝達板の表面とクリアランスをもって配されたものとなっている。ゆえに、磁気回路の磁界中にボイスコイルを配した際に、一対の硬磁性部材が互いに近づき過ぎてしまうことを制御し、磁気の流れが傾いてしまうことを防いで磁気を効果的に用い、ボイスコイルの駆動効率を向上させることができる。 A voice coil according to the present invention includes a flat plate-shaped vibration transmission plate, and a coil in which a coil wire is alternately wound around one side and the other side of a vibration transmission plate to form a flat cylindrical shape. It has become. Therefore, the structure is thinned.
In addition, the coil wound around the vibration transmission plate has a longitudinal direction arranged with a clearance from the surface of the vibration transmission plate. Therefore, when the voice coil is arranged in the magnetic field of the magnetic circuit, the pair of hard magnetic members are controlled to be too close to each other, and the magnetism is effectively used by preventing the magnetic flow from being inclined. The driving efficiency of the voice coil can be improved.
　本発明に係る反発型磁気回路は、一対の硬磁性部材が、ボイスコイルを配することが可能な空間を形成するように離間し、かつ、この空間内に反発磁界を形成するように同一極性面が対向（反発）するように配されている。また、一対の軟磁性部材が、磁気ギャップを構成せずに、一対の硬磁性部材を挟持するように他極面側にそれぞれ配され、かつ、前記空間において一軸方向に開口領域が形成されるように、一軸方向と直行する方向の少なくとも一方において互いに接合されたものとなっている。ゆえに、硬磁性部材と軟磁性部材の幅を同じ寸法とすることができ、極めて容易に構造上薄厚化・小型化、かつ、軽量化されたものとすることができる。 In the repulsive magnetic circuit according to the present invention, a pair of hard magnetic members are separated so as to form a space in which a voice coil can be arranged, and have the same polarity so as to form a repulsive magnetic field in this space. It is arranged so that the surfaces face each other (repel). Further, the pair of soft magnetic members are arranged on the other electrode surface side so as to sandwich the pair of hard magnetic members without forming a magnetic gap, and an opening region is formed in the space in a uniaxial direction. Thus, they are joined to each other in at least one of the uniaxial direction and the orthogonal direction. Therefore, the width of the hard magnetic member and that of the soft magnetic member can be made the same, and the structure can be extremely easily reduced in thickness, size, and weight.
　本発明に係るアクチュエータは、本発明に係るボイスコイルと本発明に係る反発型磁気回路とから構成され、ボイスコイルのコイルが、反発型磁気回路における一対の硬磁性部材とクリアランスをもって空間内に配されたものとなっている。ゆえに、硬磁性部材の表面より放出している磁気をコイルに有効に及ぼすことができると共に、薄厚化・小型化されて構造上小さくスペースファクターを改善し、かつ、軽量化することが可能なものとすることができる。 The actuator according to the present invention includes the voice coil according to the present invention and the repulsive magnetic circuit according to the present invention, and the coil of the voice coil is arranged in the space with a pair of hard magnetic members and a clearance in the repulsive magnetic circuit. It has been made. Therefore, it is possible to effectively apply the magnetism emitted from the surface of the hard magnetic member to the coil, and it can be made thinner and smaller to improve the space factor and reduce the weight. It can be.
　本発明に係る万能スピーカは、平板状をした振動伝達板の一面側と他面側とに交互にコイル線材が巻回されたコイルを備えたボイスコイルと、このボイスコイルを配することが可能な空間を形成するように離間し、かつ、この空間内に反発磁界を形成するように同一極性面が対向（反発）するように配された一対の硬磁性部材を少なくとも備えた反発型磁気回路とから構成されたアクチュエータを用いたものなっている。このアクチュエータは、振動伝達板の一縁部が平板状をした振動板の端縁部と連続するように接合され、振動板の面方向と同じ方向に駆動するように配されている。また、振動板は、振動伝達板と接合された一端側から対向する他端側へ向かうにしたがって湾曲する曲面部を形成するように配されている。ゆえに、難聴者と健聴者とが共に聞き取ることができる音波を発生させるものとすることができる。また、アクチュエータが薄厚化・小型化されて構造上小さくスペースファクターが改善され、かつ、軽量化することを可能とする。さらに、振動板とアクチュエータとが実用的な接合強度を有し、振動伝搬効率を向上させることで、高周波域の出力が良好なものとすることが出来る。 The universal speaker according to the present invention can be provided with a voice coil including a coil in which a coil wire is alternately wound on one side and the other side of a flat plate-shaped vibration transmission plate, and the voice coil. A repulsive magnetic circuit including at least a pair of hard magnetic members that are spaced apart so as to form a reciprocal space and that have the same polarity faces to oppose (repel) so as to form a repelling magnetic field in the space. An actuator composed of the following is used. This actuator is joined so that one edge portion of the vibration transmission plate is continuous with the end edge portion of the plate-like vibration plate, and is driven in the same direction as the surface direction of the vibration plate. Further, the diaphragm is arranged so as to form a curved surface portion that curves as it goes from one end side joined to the vibration transmission plate to the other opposite end side. Therefore, it is possible to generate sound waves that can be heard by both the hearing impaired and the normal hearing. In addition, the actuator is thinned and miniaturized, the structure is small, the space factor is improved, and the weight can be reduced. Furthermore, the diaphragm and the actuator have a practical joint strength, and the vibration propagation efficiency is improved, so that the output in the high frequency region can be improved.
本発明に係る万能スピーカを示す斜視図である。It is a perspective view which shows the universal speaker which concerns on this invention. 本発明に係るアクチュエータを示す斜視図である。It is a perspective view which shows the actuator which concerns on this invention. 本発明に係るボイスコイルを説明する、（Ａ）分解斜視図、（Ｂ）組み立て完成斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the (A) disassembled perspective view and (B) assembly completion perspective view explaining the voice coil which concerns on this invention. 本発明に係るボイスコイルを示す振動板接続部端面側正面図である。It is a diaphragm connection part end surface side front view which shows the voice coil which concerns on this invention. 本発明に係る磁気回路を説明する分解斜視図である。It is a disassembled perspective view explaining the magnetic circuit which concerns on this invention. 本発明に係る磁気回路の組み立て完成正面図である。FIG. 3 is a front view of the completed assembly of the magnetic circuit according to the present invention. 本発明に係るアクチュエータを説明する分解斜視図である。It is a disassembled perspective view explaining the actuator which concerns on this invention. 本発明に係るアクチュエータの組み立て完成正面図である。FIG. 3 is a front view of an assembled actuator according to the present invention. 本発明に係るアクチュエータと湾曲平板状振動板によって、本発明に係るスピーカの組み立て状態を説明する斜視図である。It is a perspective view explaining the assembly state of the speaker which concerns on this invention with the actuator which concerns on this invention, and a curved flat diaphragm. 本発明に係るボイスコイルと平板状振動板との接続装着状態を説明する平面図である。It is a top view explaining the connection mounting state of the voice coil which concerns on this invention, and a flat diaphragm. 本発明に係るボイスコイルに接続装着した平板状振動板との接合部にシート状部材を貼着する状態を説明する側面図である。It is a side view explaining the state which affixes a sheet-like member on a junction part with the flat diaphragm attached to the voice coil which concerns on this invention. 本発明に係るボイスコイルに接続装着した平板状振動板の湾曲状態を説明する側面模式図である。It is a side surface schematic diagram explaining the curved state of the flat diaphragm attached to the voice coil which concerns on this invention. 本発明に係る万能スピーカに用いるアクチュエータにおいて振動伝達板の一部を支持部材で挟持する状態を示す断面図である。It is sectional drawing which shows the state which clamps a part of vibration-transmission board with a support member in the actuator used for the universal speaker which concerns on this invention. 本発明に係る万能スピーカに用いるアクチュエータにおいて反発型磁気回路を挟んで振動伝達板の両側を支持部材で挟持する状態を示す断面図である。It is sectional drawing which shows the state which clamps the both sides of a vibration transmission board with a supporting member on both sides of a repulsion-type magnetic circuit in the actuator used for the universal speaker which concerns on this invention. 本発明に係る他の万能スピーカを示す斜視図である。It is a perspective view which shows the other universal speaker which concerns on this invention. 図１５に示す万能スピーカの中央縦断面模式図である。It is a center longitudinal cross-section schematic diagram of the universal speaker shown in FIG. 図１５に示す万能スピーカにおける筺体の側板を説明する斜視図である。It is a perspective view explaining the side plate of the housing in the universal speaker shown in FIG. 図１５に示す万能スピーカにおける筺体の他の側板を説明する斜視図である。It is a perspective view explaining the other side plate of the housing in the universal speaker shown in FIG. 本発明に係る万能スピーカに用いる平板状振動板を説明する、（Ａ）一端側が徐々に幅狭となっている状態の部分正面図、（Ｂ）一端側が徐々に幅狭となっている他の状態の部分正面図である。The flat diaphragm used for the universal speaker which concerns on this invention is demonstrated, (A) The partial front view of the state where the one end side becomes gradually narrow, (B) The other one where the one end side becomes gradually narrow It is a partial front view of a state. 本発明に係る万能スピーカに用いる平板状振動板を説明する、（Ａ）一端側が徐々に幅狭となっており、かつ、一端側の両側上縁角部が丸みを帯びている状態の部分正面図、（Ｂ）一端側が徐々に幅狭となっており、かつ、一端側の両側上縁角部が丸みを帯びている他の状態の部分正面図である。The flat diaphragm used for the universal speaker which concerns on this invention is demonstrated, (A) The partial front surface of the state where the one end side is gradually narrowed and the both upper edge corners of one end side are rounded FIG. 4B is a partial front view of another state in which one end side is gradually narrowed and both upper edge corners on one end side are rounded. 本発明に係る万能スピーカに用いる、予め湾曲振動板領域と振動伝達板領　　域とが一体的に形成された振動板伝達板一体化部品を説明する正面図である。FIG. 3 is a front view for explaining a diaphragm transmission plate integrated part in which a curved diaphragm region and a vibration transmission plate region are integrally formed in advance for use in the universal speaker according to the present invention. 本発明に係る万能スピーカに用いる筺体の他の側板を説明する斜視図である。It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. 本発明に係る万能スピーカに用いる筺体の他の側板を説明する斜視図である。It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. 本発明に係る万能スピーカに用いる筺体の他の側板を説明する斜視図である。It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. 本発明に係る万能スピーカに用いる筺体の他の側板を説明する斜視図である。It is a perspective view explaining the other side plate of the housing used for the universal speaker which concerns on this invention. 本発明に係る他の万能スピーカを示す平面図である。It is a top view which shows the other universal speaker which concerns on this invention. 本発明に係る他の万能スピーカを示す正面中央縦断面模式図である。It is a front center longitudinal cross-sectional schematic diagram which shows the other universal speaker which concerns on this invention. 本発明に係る他の万能スピーカを示す斜視図である。It is a perspective view which shows the other universal speaker which concerns on this invention. 図２８に示す万能スピーカの正面中央縦断面模式図である。It is a front center longitudinal cross-section schematic diagram of the universal speaker shown in FIG. 本発明に係る他の万能スピーカを示す斜視図である。It is a perspective view which shows the other universal speaker which concerns on this invention. 図３０に示す万能スピーカを示す中央縦断面模式図である。It is a center longitudinal cross-section schematic diagram which shows the universal speaker shown in FIG. 本発明に係るハイブリッド型の万能スピーカを示す正面中央縦断面模式図である。It is a front center longitudinal cross-sectional schematic diagram which shows the hybrid type universal speaker which concerns on this invention. 本発明に係るハイブリッド型の他の万能スピーカを示す正面中央縦断面模式図である。It is a front center longitudinal cross-section schematic diagram which shows the other hybrid type universal speaker which concerns on this invention. 本発明に係るハイブリッド型の他の万能スピーカを示す正面中央縦断面模式図である。It is a front center longitudinal cross-section schematic diagram which shows the other hybrid type universal speaker which concerns on this invention. 本発明に係るボイスコイルの他の形状を示す平面図である。It is a top view which shows the other shape of the voice coil which concerns on this invention. 本発明に係るボイスコイルの他の形状を示す平面図である。It is a top view which shows the other shape of the voice coil which concerns on this invention. 従来例のボイスコイルを説明する、（Ａ）分解斜視図、（Ｂ）組み立て完成斜視図である。It is a (A) exploded perspective view and a (B) assembly completion perspective view explaining a voice coil of a conventional example. 従来例の磁気回路を説明する、（Ａ）分解斜視図、（Ｂ）組み立て完成斜視図である。It is a (A) disassembled perspective view and (B) assembly completion perspective view explaining the magnetic circuit of a prior art example. 従来例のボイスコイル及び磁気回路によってアクチュエータを組み立てると共に、コーン振動板によって組み立てたスピーカを説明する、（Ａ）分解斜視図、（Ｂ）組み立て完成斜視図である。FIG. 5A is an exploded perspective view and FIG. 5B is an assembled perspective view for explaining a speaker assembled with a cone diaphragm while assembling an actuator with a voice coil and a magnetic circuit of a conventional example. 従来例のアクチュエータと湾曲平板状振動板によってスピーカを組み立てた状態を示す斜視図である。It is a perspective view which shows the state which assembled the speaker with the actuator of the prior art example, and the curved flat diaphragm.
　次に、本発明の実施の形態の一例を図面に基づいて説明する。
　なお、以下に述べる実施の形態は、本発明の好適な具体例であるため技術的に種々の限定が付されているが、本発明の範囲は、以下の説明において特に限定する旨の記載がない限り、これらの形態に限られるものではない。 Next, an example of an embodiment of the present invention will be described with reference to the drawings.
Although the embodiments described below are preferred specific examples of the present invention, various technical limitations are applied. However, the scope of the present invention is described as being particularly limited in the following description. As long as it is not, it is not restricted to these forms.
　本発明の最も大きな特徴は、図１から図８までに示すように、湾曲振動板１に効率良く振動伝達を果たすべく対応したボイスコイル３の構造と、このボイスコイル３を駆動するための磁気回路４の構造、このボイスコイル３と磁気回路４とから構成されるアクチュエータ２の構造、及びこのアクチュエータ２を用いたスピーカ（以下、「万能スピーカ」という。）１０の構造にある。 As shown in FIGS. 1 to 8, the most significant feature of the present invention is the structure of the voice coil 3 that can efficiently transmit vibration to the curved diaphragm 1, and the magnetic force for driving the voice coil 3. The structure of the circuit 4, the structure of the actuator 2 composed of the voice coil 3 and the magnetic circuit 4, and the structure of a speaker (hereinafter referred to as “universal speaker”) 10 using the actuator 2.
　本実施の形態における万能スピーカ１０は、難聴者と健聴者とが共に聞き取ることができるものである。図１に示すように、万能スピーカ１０は、平板状をした振動板１と、入力された電気信号に応じて振動板に効率良く振動伝達を果たすべく対応したアクチュエータ２とを少なくとも備えることにより構成されている。 The universal speaker 10 in the present embodiment can be heard by both the hearing impaired person and the normal hearing person. As shown in FIG. 1, the universal speaker 10 is configured by including at least a diaphragm 1 having a flat plate shape and an actuator 2 corresponding to efficiently transmitting vibration to the diaphragm in accordance with an input electric signal. Has been.
　振動板１は、アクチュエータ２と接合された一端側から対向する他端側へ向かうにしたがって湾曲する曲面部を形成するように配されている。この振動板１は、フィルムやシートのように平たい薄厚の部材であって、たとえば、カーボン紙などの紙、ポリイミドやポリエステルなどの可撓性を有するプラスチック、バルサ材などの木材、アルミニウムやベリリウム、ボロンなどの金属、ガラス等の材料を用いることができる。 The diaphragm 1 is arranged so as to form a curved surface portion that curves as it goes from one end side joined to the actuator 2 to the other end side. The diaphragm 1 is a flat and thin member such as a film or sheet. For example, paper such as carbon paper, flexible plastic such as polyimide or polyester, wood such as balsa material, aluminum or beryllium, A metal such as boron or a material such as glass can be used.
　また、振動板１は、平面視して略矩形状であるが、これに限らず、たとえば、平面視して略円形状あるいは略多角形状等であってもよい。さらに、振動板１は、予め湾曲する曲面部を有するように成形されているもののほか、柔軟性を有すると同時に張りのある性質を備えて湾曲する曲面部を形成することができるものをいう。なお、振動板１の厚みは、曲面部を有するように成形したり、弾性的に曲げて変形させたりすることができれば特に限定されない。 The diaphragm 1 has a substantially rectangular shape in plan view, but is not limited thereto, and may be, for example, a substantially circular shape or a substantially polygonal shape in plan view. Furthermore, the diaphragm 1 is not only shaped so as to have a curved surface portion that is curved in advance, but also capable of forming a curved surface portion that has flexibility and has a tension property. The thickness of the diaphragm 1 is not particularly limited as long as it can be shaped to have a curved surface portion or can be elastically bent and deformed.
　アクチュエータ２は、入力（通電）された電気信号（音声信号）に応じて振動板１を振動させる音響機器用の駆動装置であって、図２から図８までに示すように、ボイスコイル３と、磁気回路４から構成されている。 The actuator 2 is a drive device for an acoustic device that vibrates the diaphragm 1 in accordance with an input (energized) electric signal (audio signal). As shown in FIGS. The magnetic circuit 4 is configured.
　ボイスコイル３は、平板状をした振動板１を駆動するアクチュエータ用のボイスコイルである。図３及び図４に示すように、ボイスコイル３は、振動伝達板３１と、 この振動伝達板３１の周囲に巻回されたコイル３２を備える。 The voice coil 3 is a voice coil for an actuator that drives the flat diaphragm 1. As shown in FIGS. 3 and 4, the voice coil 3 includes a vibration transmission plate 31 and a coil 32 wound around the vibration transmission plate 31.
　振動伝達板３１は、コイル線材が巻回される平板状をした捲芯部材である。すなわち、ボイスコイル３は、湾曲振動板へ効率良く振動を伝達せんがため、従来のスピーカに用いられている円筒状のボビン形態を用いず、平板状の捲芯部材からなるボビン形態を用いる。ゆえに、ボビン相当部材は、円筒形状に比して構造上小さく薄厚化された平面的なものとなっている。 The vibration transmission plate 31 is a flat core member around which a coil wire is wound. That is, since the voice coil 3 efficiently transmits vibrations to the curved diaphragm, it does not use the cylindrical bobbin form used in the conventional speaker, but uses a bobbin form made of a flat core member. Therefore, the bobbin equivalent member is a planar member that is structurally smaller and thinner than the cylindrical shape.
　振動伝達板３１の材質は特に限定されるものではなく、世間一般に多用されているボイスコイルボビン材で良い。本実施の形態では、たとえば、ガラス繊維を平織りした布に、ポリイミド樹脂をコートし含浸させ、熱硬化せしめてシート状にしたものを用いることができる。また、振動伝達板３１の大きさも特に限定されるものではなく、たとえば、厚さ寸法０．２ｍｍのシートを、４０ｍｍ角に切断して振動伝達板３１として用いることができる。なお、本実施の形態では、振動板１と接続される端辺を振動板接続部３１ａとし、その逆側の端辺をコイルリード線端末部３１ｂとする。 The material of the vibration transmission plate 31 is not particularly limited, and may be a voice coil bobbin material that is widely used in the world. In the present embodiment, for example, a cloth in which a glass fiber is plain-woven is coated and impregnated with a polyimide resin and thermally cured to form a sheet can be used. Further, the size of the vibration transmission plate 31 is not particularly limited. For example, a sheet having a thickness of 0.2 mm can be cut into a 40 mm square and used as the vibration transmission plate 31. In the present embodiment, the end connected to the diaphragm 1 is the diaphragm connecting portion 31a, and the opposite end is the coil lead terminal portion 31b.
　コイル３２は、コイル線材が振動伝達板３１の一面側と他面側とに交互に巻回される、扁平長円筒状に形成されものとなっている。すなわち、コイル３２の外形は、世間一般に呼ばれているところの小判型（長円型）空芯タイプとすることができる。 The coil 32 is formed in a flat cylindrical shape in which a coil wire is alternately wound around one side and the other side of the vibration transmission plate 31. In other words, the outer shape of the coil 32 can be the oval type (ellipse type) air-core type that is generally called.
　このコイル３２としては、たとえば、直径が０．２ｍｍのコイル用線材を用い、ターン数は１層３０ターンで２層仕様とする。コイル３２の寸法は、４０ｍｍ角の振動伝達板３１に装着する場合、コイル内側寸法ではあるが、長手方向長さ４０ｍｍ×短手（厚み）方向長さ３ｍｍ×巻き幅６ｍｍ、直流抵抗が約３．４Ω～３．５Ωとすることができる。 As the coil 32, for example, a coil wire having a diameter of 0.2 mm is used, and the number of turns is set to two layers with one layer 30 turns. When the coil 32 is mounted on a 40 mm square vibration transmission plate 31, it is the inner dimension of the coil, but the length in the longitudinal direction is 40 mm × the length in the short (thickness) direction is 3 mm × the winding width is 6 mm, and the DC resistance is about 3 .4Ω to 3.5Ω.
　コイル３２の形成後、図３（Ａ）において点線矢印で示すように、その内側（空芯部）には、振動伝達板３１が挿入される。
　このように、コイル３２の形状が、コイル線材の巻き方向に対して直交する方向から見て小判（長穴）形状、若しくは長円形状であり、コイル３２の中心空間内に振動伝達板３１を配置したボイスコイル構造とすることにより、磁気の流れをより効果的に用いることが可能となる利点を有する。また、振動伝達板３１は、コイル３２の巻き幅方向の双方において延出露呈した状態に配され、延出した側の一辺（前端部）が、振動板接続部３１ａとなる。 After the coil 32 is formed, the vibration transmitting plate 31 is inserted inside (air core portion) as shown by a dotted arrow in FIG.
Thus, the shape of the coil 32 is an oval (long hole) shape or an oval shape when viewed from a direction orthogonal to the winding direction of the coil wire rod, and the vibration transmitting plate 31 is disposed in the central space of the coil 32. By providing the arranged voice coil structure, there is an advantage that the magnetic flow can be used more effectively. Further, the vibration transmission plate 31 is arranged in a state of extending and exposed in both the winding width directions of the coil 32, and one side (front end portion) of the extended side becomes the vibration plate connecting portion 31a.
　振動伝達板３１の寸法とコイル３２の内側寸法とを同じにした場合、振動伝達板３１はコイル３２の短手側内面、つまりコイル３２の長手方向両端部内面に振動伝達板３１の二辺（両側端部）を接触させつつ挿入されたものとなる。すなわち、振動伝達板３１の対向する一対の側辺がコイル３２の長手方向両端部の頂点近傍にそれぞれ密着した状態で配置され、コイル３２が振動板伝達板３１からむやみに脱落しないものとなっている。ゆえに、コイル３２の長手方向内側寸法は、振動板伝達板３１の対向する一対の側辺間の長さと略等しくなるように設計することが望ましい。 When the dimensions of the vibration transmission plate 31 and the inner dimensions of the coil 32 are the same, the vibration transmission plate 31 is formed on the short side inner surface of the coil 32, that is, on the inner surfaces of both ends in the longitudinal direction of the coil 32. It is inserted with both end portions in contact with each other. That is, the pair of opposite sides of the vibration transmission plate 31 are arranged in close contact with the apexes at both ends in the longitudinal direction of the coil 32, so that the coil 32 does not fall off from the vibration plate transmission plate 31 unnecessarily. Yes. Therefore, it is desirable to design the inner dimension of the coil 32 in the longitudinal direction so as to be approximately equal to the length between the pair of opposing sides of the diaphragm transmission plate 31.
　また、コイル３２は、コイル線材の巻き工程に用いる巻き線冶具によって短手領域側において適切な寸法を得ることにより、必要強度を得るに充分な板厚寸法を確保することができる。その結果、量産を前提としたコイルの作製が、極めて容易なものとなる利点を有する。 Moreover, the coil 32 can secure a sufficient plate thickness dimension to obtain the required strength by obtaining an appropriate dimension on the short region side by a winding jig used in the coil wire winding process. As a result, there is an advantage that the manufacture of the coil on the premise of mass production becomes extremely easy.
　そして、図３（Ｂ）に示すように、コイル３２の内側に振動伝達板３１を挿入装着した後、振動伝達板３１とコイル３２とを接合し、振動板駆動用のボイスコイル３を完成させる。この際、図４に示すように、コイル３２は、長手方向が振動伝達板３１の表面とクリアランス（隙間）３３，３３をもって配されたものとなっていることが望ましい。すなわち、振動伝達板３１は、小判型（長円型）空芯タイプのコイル３２において長手方向両端部となる二ヶ所のＲ状端部の中心を通過する線上に設置されることで、コイル３２の長手方向領域が、振動伝達板３１の一面側及び他面側の表面と直に接しておらず、離間して巻回されたものとなる。 Then, as shown in FIG. 3B, after the vibration transmission plate 31 is inserted and mounted inside the coil 32, the vibration transmission plate 31 and the coil 32 are joined to complete the voice coil 3 for driving the vibration plate. . At this time, as shown in FIG. 4, it is desirable that the coil 32 is arranged with the surface of the vibration transmission plate 31 and clearances (clearances) 33, 33 in the longitudinal direction. That is, the vibration transmission plate 31 is installed on a line passing through the centers of the two R-shaped end portions which are both ends in the longitudinal direction in the oval (oval) air-core type coil 32, whereby the coil 32. Are not directly in contact with the surfaces of the vibration transmission plate 31 on one side and the other side, but are wound apart.
　具体的には、長手方向内側長さ４０ｍｍ×短手方向内側長さ３ｍｍ×巻き幅６ｍｍのコイル３２の内側に、４０ｍｍ角で厚さ０．２ｍｍの振動伝達板３１を挿入装着した場合、コイル３２の長手方向が、約１．４ｍｍの距離寸法のコイル内側クリアランス（隙間）３３を有して配置されたものとなる。 Specifically, when a vibration transmission plate 31 having a 40 mm square and a thickness of 0.2 mm is inserted and mounted inside a coil 32 having a length in the longitudinal direction of 40 mm, a length in the short direction of 3 mm, and a winding width of 6 mm, the coil The longitudinal direction of 32 is arranged with a coil inner clearance (gap) 33 having a distance dimension of about 1.4 mm.
　このように、振動伝達板３１の表面とコイル３２の長手方向領域内側の間に適切な寸法幅のクリアランス（空間）３３を設けることで、磁気の流れをより一層効果的に用いることが可能となる利点を有する。 Thus, by providing the clearance (space) 33 having an appropriate dimension width between the surface of the vibration transmission plate 31 and the inside of the longitudinal direction region of the coil 32, it is possible to use the magnetic flow more effectively. Has the advantage of
　また、振動伝達板３１とコイル３２との接合方法は特に限定されるものではなく、たとえば、図４に示すように、振動伝達板３１の端縁部とコイル３２のＲ状端部（すなわち、長手方向両端部）内側との接触（密着）部に充填材３４としての耐熱接着剤を塗布する。次いで、塗布した耐熱接着剤を熱硬化せしめることで、振動伝達板３１とコイル３２の接着による装着を完了することができる。 Moreover, the joining method of the vibration transmission plate 31 and the coil 32 is not particularly limited. For example, as shown in FIG. 4, the edge portion of the vibration transmission plate 31 and the R-shaped end portion of the coil 32 (that is, A heat-resistant adhesive as the filler 34 is applied to the contact (adhesion) portion with the inside (longitudinal ends). Next, the applied heat-resistant adhesive is thermally cured to complete the mounting by bonding the vibration transmission plate 31 and the coil 32.
　具体的は、振動伝達板３１とコイル３２の長手方向両端部内側との接触部に、耐熱接着剤３４としてエポキシ系の接着剤を塗布し、熱硬化せしめる。接着剤の塗布量は、たとえば、１ヶ所につき約０．０２ｇ～０．０４ｇとすることができる。なお、接着剤はエポキシ系に限らず、目的を適える接着剤で有れば、アクリル系等の接着剤等どの様な種類の接着剤を用いても一向に構わない。 Specifically, an epoxy adhesive is applied as a heat-resistant adhesive 34 to the contact portion between the vibration transmitting plate 31 and the inside of both ends of the coil 32 in the longitudinal direction, and is thermally cured. The amount of adhesive applied can be, for example, about 0.02 g to 0.04 g per location. Note that the adhesive is not limited to the epoxy type, and any type of adhesive such as an acrylic type adhesive may be used as long as the adhesive is suitable for the purpose.
　このようにボイスコイル３は、コイル３２のＲ状端部の内側に振動伝達板３１を接触せしめ、振動伝達板３１とコイル３２との接触部分を接着等の手法で接続固定し、振動伝達板３１にコイル３２を装着することで、完成したボイスコイル３自体の強度を増し、尚且つコイル３２の変形防止に有効な利点を有する。 In this way, the voice coil 3 has the vibration transmission plate 31 in contact with the inner side of the R-shaped end of the coil 32, and the contact portion between the vibration transmission plate 31 and the coil 32 is connected and fixed by a technique such as adhesion. By attaching the coil 32 to 31, the strength of the completed voice coil 3 itself is increased, and there is an advantage effective in preventing the deformation of the coil 32.
　また、小判型（長円型）コイル３２を作製するにおいて、巻き付けるコイル線材の張力（テンション）がコイル３２の短辺領域に集中し、通常一般の円（丸）型コイルを作製するが如く一定にはならない。そのため、コイル３２の長手方向領域に均等な張力が及ばず、長手方向中央部に向かうに従い張力は弱いものとなり、当然のことながらコイル３２の長手方向の線材の張りは緩くなって、コイル３２の形態の維持能力が一般的な円（丸）型コイルよりも不安定なものになり易い。 Further, when the oval (oval) coil 32 is manufactured, the tension of the coil wire to be wound is concentrated on the short side region of the coil 32, and it is constant as a normal circular (round) coil is manufactured. It will not be. Therefore, a uniform tension does not reach the longitudinal direction region of the coil 32, and the tension becomes weaker toward the central portion in the longitudinal direction. Naturally, the tension of the wire material in the longitudinal direction of the coil 32 becomes loose, and the coil 32 The form maintaining ability tends to be more unstable than a general circular (round) coil.
　つまり、小判型（長円型）コイル３２における長手方向中央部は、円（丸）型コイルよりも変形し易い、或いはバラケやすい等の構造的性格を有する。ゆえに、この性格を未然に防ぐ目的で、たとえば、図４に示すように、コイル３２の長手方向の一部が充填材３４としての耐熱接着剤を介して振動伝達板３１の表面に固定されたものとすると望ましい。 That is, the central portion in the longitudinal direction of the oval (oval) coil 32 has a structural character such as being easier to deform or break than a circular (round) coil. Therefore, for the purpose of preventing this character, for example, as shown in FIG. 4, a part of the coil 32 in the longitudinal direction is fixed to the surface of the vibration transmission plate 31 via a heat-resistant adhesive as a filler 34. Desirable.
　このようにコイル３２の長手領域における、振動伝達板３１の表面との隙間３３の適宜箇所に耐熱接着剤３４を充填塗布することにより、コイル３２の長手方向の品質を安定化することが可能となる。また、ボイスコイル３としての振動伝搬効率も向上し、音質調整が容易に行える利点を有しているので、充填材３４の塗布重量を鑑みつつ、振動伝達板３１の表面とコイル３２の長手方向との隙間に所望量の耐熱接着剤３４を充填塗布することができる。 Thus, by filling and applying the heat-resistant adhesive 34 to an appropriate portion of the gap 33 with the surface of the vibration transmission plate 31 in the longitudinal region of the coil 32, the quality in the longitudinal direction of the coil 32 can be stabilized. Become. Further, since the vibration propagation efficiency as the voice coil 3 is improved and the sound quality can be easily adjusted, the surface of the vibration transmission plate 31 and the longitudinal direction of the coil 32 are taken into consideration while considering the coating weight of the filler 34. A desired amount of the heat-resistant adhesive 34 can be filled and applied in the gap.
　図４において、振動伝達板３１の一面側中央部とコイル３２の長手方向中央部の隙間３３、及び振動伝達板３１の他面側中央部とコイル３２の長手方向中央部の隙間３３に、接着剤３４がそれぞれ充填塗布され、振動伝達板３１の一面側及び他面側においてコイル３２の長手方向の一箇所がそれぞれ固定されたものとして示されている。
　なお、コイル３２の長手領域における振動伝達板３１表面への固定は、長手方向中央部の一箇所に限定されない。ゆえに、コイル３２の長手領域に均等な張力が得られるのであれば、長手方向の複数個所において充填材３４により固定されたものとしても良い。 In FIG. 4, adhesion is made to the gap 33 between the central portion of the vibration transmission plate 31 and the longitudinal direction of the coil 32, and the clearance 33 between the central portion of the other side of the vibration transmission plate 31 and the longitudinal portion of the coil 32. It is shown that the agent 34 is filled and applied, and one place in the longitudinal direction of the coil 32 is fixed on one side and the other side of the vibration transmission plate 31.
In addition, fixation to the vibration transmission plate 31 surface in the longitudinal region of the coil 32 is not limited to one place in the central portion in the longitudinal direction. Therefore, as long as uniform tension is obtained in the longitudinal region of the coil 32, the coil 32 may be fixed by the filler 34 at a plurality of locations in the longitudinal direction.
　また、ボイスコイル３２の配線においては、図３（Ａ）に示すように、コイル線材の巻き始め端部３２ａ及び巻き終わり端部３２ｂから引き出された線（以下、「コイルリード線」という。）３５ａ，３５ｂの位置が、コイル３２の長手領域に位置するように設定する。さらに、図３（Ｂ）に示すように、振動伝達板３１にコイル３２を装着する際、コイル線材の巻き始め端部３２ａ及び巻き終わり端部３２ｂが、振動板接続部３１ａを構成する端辺とは反対側の端辺、すなわち、コイルリード線端末部３１ｂ側を向いて位置するように、振動伝達板３１の表面上に配されたものとすると望ましい。 In the wiring of the voice coil 32, as shown in FIG. 3A, wires drawn from the winding start end portion 32a and the winding end end portion 32b of the coil wire (hereinafter referred to as “coil lead wires”). The positions of 35a and 35b are set so as to be located in the longitudinal region of the coil 32. Further, as shown in FIG. 3B, when the coil 32 is attached to the vibration transmitting plate 31, the winding start end portion 32a and the winding end end portion 32b of the coil wire material constitute end portions constituting the diaphragm connecting portion 31a. It is desirable that it be disposed on the surface of the vibration transmitting plate 31 so as to be positioned facing the opposite end side, that is, the coil lead wire terminal portion 31b side.
　そして、巻き始め端部３２ａ及び巻き終わり端部３２ｂに及んでいる２本のコイルリード線３５ａ，３５ｂをそれぞれコイルリード線端末部３１ｂ側の端辺近傍まで及ぼし、この端辺部にて、コイルリード線３５ａ，３５ｂと錦糸線としての音声信号入力線３７ａ，３７ｂとをそれぞれ半田付けして配線を行う。 Then, the two coil lead wires 35a and 35b extending to the winding start end portion 32a and the winding end end portion 32b are respectively applied to the vicinity of the end side on the coil lead end portion 31b side, The lead wires 35a and 35b and the audio signal input lines 37a and 37b as the tinsel wires are soldered and wired.
　この際、２本のコイルリード線３５ａ，３５ｂの間隔は、設計目的に応じて適宜調整することができ、たとえば、１６ｍｍとすることができる。また、半田付け配線近傍にアンプ基盤等の出力端子を設けた場合などは、この出力端子のピッチ幅等に対応して、音声信号入力線３７ａ，３７ｂとの配線作業をやり易くする等の変更も可能である。 At this time, the interval between the two coil lead wires 35a and 35b can be appropriately adjusted according to the design purpose, and can be set to 16 mm, for example. Also, when an output terminal such as an amplifier board is provided in the vicinity of the soldering wiring, etc., such as making the wiring work with the audio signal input lines 37a and 37b easier to handle in accordance with the pitch width of the output terminal, etc. Is also possible.
　また、２本のコイルリード線３５ａ，３５ｂと音声信号入力線３７ａ，３７ｂとを半田付けした半田コート部３８の位置は、図３（Ｂ）に示すように、コイルリード線端末部３１ｂ側の辺端部に限らず、音声信号入力線３７ａ，３７ｂの太さや、半田鏝先のサイズによって辺端部より内側の位置にしても良く、自由に設定出来るものである。 Also, the position of the solder coat portion 38 where the two coil lead wires 35a and 35b and the audio signal input wires 37a and 37b are soldered is located on the coil lead wire terminal portion 31b side as shown in FIG. The position is not limited to the side edge portion, and may be set to a position inside the side edge portion depending on the thickness of the audio signal input lines 37a and 37b and the size of the solder iron tip, and can be freely set.
　ここで、４０ｍｍ角の大きさをした振動伝達板３１に取り付けたボイスコイル３２に対して、音声信号入力線３７ａ，３７ｂを半田付けする配線を行う場合、たとえば、次のようにして行うことができる。まず、ボイスコイル３２におけるコイル線材の巻き始め端部３２ａ及び巻き終わり端部３２ｂのそれぞれより約１５ｍｍの位置から、２本のコイルリード線３５ａ，３５ｂの絶縁層を剥離し、この剥離個所に半田コート処理を施す。 Here, when wiring for soldering the audio signal input lines 37a and 37b to the voice coil 32 attached to the vibration transmission plate 31 having a size of 40 mm square, for example, the following may be performed. it can. First, the insulation layers of the two coil lead wires 35a and 35b are peeled off from the positions of about 15 mm from the winding start end portion 32a and the winding end end portion 32b of the coil wire in the voice coil 32, and solder is applied to the peeling portions. Apply coating.
　次いで、概ね６０ｍｍの長さでコイルリード線３５ａ，３５ｂを切断すると共に、巻き始め端部３２ａ及び巻き終わり端部３２ｂより概ね２０ｍｍの位置までゴム系接着剤３６，３６にて覆い、コイルリード線３５ａ，３５ｂが振動伝達板３１の表面に接着固定されるまで放置する。この接着剤３６を塗布することにより、コイル線材の巻き始め端部３２ａ及び巻き終わり端部３２ｂの強度が増すと共に、コイル長手方向の補強効果も得られる。このとき、コイルリード線３５ａ，３５ｂの端部が振動伝達板３１の端部近傍表面上にフリー状態で配置される。 Next, the coil lead wires 35a and 35b are cut to a length of about 60 mm, and covered with rubber adhesives 36 and 36 to a position of about 20 mm from the winding start end portion 32a and the winding end end portion 32b. It is left until 35a, 35b is adhered and fixed to the surface of the vibration transmitting plate 31. By applying the adhesive 36, the strength of the winding start end portion 32a and the winding end end portion 32b of the coil wire is increased, and a reinforcing effect in the coil longitudinal direction is also obtained. At this time, the end portions of the coil lead wires 35 a and 35 b are arranged in a free state on the surface in the vicinity of the end portion of the vibration transmission plate 31.
　引き続き、振動伝達板３１のコイルリード線端末部３１ｂ側に音声信号入力線３７ａ，３７ｂを配置し、フリー状態となっているコイルリード線３５ａ，３５ｂの端部を音声信号入力線３７ａ，３７ｂの端部に絡めて半田付けする。半田付け完了後、コイルリード線３５ａ，３５ｂの余分な部分をカットし、この半田付け部分にゴム系接着剤を塗布して覆う。そして、接着剤塗布時に、振動伝達板３１の表面に這わせたコイルリード線３５ａ，３５ｂの半田コート部３８の残りの露出部にも接着剤を塗布して全てのコイルリード線３５ａ，３５ｂを覆い、最終的にコイルリード線３５ａ，３５ｂ及び音声信号入力線３７ａ，３７ｂを振動伝達板３１に接着して装着することにより、配線作業を完了する。 Subsequently, the audio signal input wires 37a and 37b are arranged on the coil lead wire terminal portion 31b side of the vibration transmission plate 31, and the ends of the coil lead wires 35a and 35b in the free state are connected to the audio signal input wires 37a and 37b. Tangle with the end and solder. After the soldering is completed, excess portions of the coil lead wires 35a and 35b are cut, and a rubber adhesive is applied to the soldered portions to cover them. Then, at the time of applying the adhesive, the adhesive is applied to the remaining exposed portions of the solder coat portions 38 of the coil lead wires 35a and 35b placed on the surface of the vibration transmission plate 31, and all the coil lead wires 35a and 35b are attached. The wiring work is completed by covering and finally attaching the coil lead wires 35a and 35b and the audio signal input wires 37a and 37b to the vibration transmitting plate 31.
　なお、設計目的によっては、コイルリード線３５ａ，３５ｂへの接着剤塗布を省いても構わない。また、接着剤塗布に代えて、コイルリード線３５ａ，３５ｂを粘着（接着）テープ等にて覆って伝達振動板３１の表面に密着せしめても一向に構わない。 Note that, depending on the design purpose, the application of adhesive to the coil lead wires 35a and 35b may be omitted. Further, instead of applying the adhesive, the coil lead wires 35a and 35b may be covered with an adhesive (adhesive) tape or the like and adhered to the surface of the transmission diaphragm 31.
　音声信号入力線（錦糸線）３７ａ，３７ｂは、世間一般で呼ばれている丸型編み線である。すなわち、音声信号入力線３７ａ，３７ｂは、素線を任意の偶数本数にて組編みした編組線であって、通常のスピーカの入力端子からボイスコイル間に用いられる配線材である。この丸型編み線は、振幅するボイスコイルの激しい動きに対応可能で、耐振幅性能が一般線材より遥かに優れている。したがって、本発明の万能スピーカシステムにおいても、従来のスピーカと同等の耐振幅性能を確保出来る。 The audio signal input lines (kinshi line) 37a and 37b are round knitting wires generally called by the general public. That is, the audio signal input lines 37a and 37b are braided wires formed by braiding strands with an arbitrary even number, and are wiring materials used between the input terminals of normal speakers and the voice coils. This round braided wire can cope with the violent movement of the voice coil that vibrates, and has an amplitude resistance far superior to that of a general wire. Therefore, even in the universal speaker system of the present invention, the same amplitude resistance performance as that of the conventional speaker can be secured.
　このように、ボイスコイル３の振動伝達板３１の表面にコイルリード線３５ａ，３５ｂを這わし、この這わせ部分をコイルリード線端末部３１ｂまで及ぼして音声信号入力線３７ａ，３７ｂと接続配線することにより、振動に対する給電線の信頼性が確保できるものとなる。また、コイルリード線３５ａ，３５ｂの這わせ部分及び音声信号入力線３７ａ，３７ｂが、振動板接続部３１ａと反対側方向、すなわち、コイルリード線端末部３１ｂ側に配置する配線構造にすることにより、配線作業が容易になり、メンテナンス性も向上するものとなる。 In this way, the coil lead wires 35a and 35b are wound on the surface of the vibration transmission plate 31 of the voice coil 3, and this twisted portion is extended to the coil lead wire terminal portion 31b to be connected to the audio signal input lines 37a and 37b. Thus, the reliability of the feeder line against vibration can be ensured. Further, by arranging the coil lead wires 35a and 35b and the audio signal input lines 37a and 37b in the direction opposite to the diaphragm connecting portion 31a, that is, the coil lead wire terminal portion 31b side. Wiring work is facilitated and maintainability is improved.
　なお、コイル線材の巻き始め端部３２ａ及び巻き終わり端部３２ｂよりコイルリード線３５ａ，３５ｂを引き出し、音声信号入力線３７ａ，３７ｂを配線する場合、従来のスピーカの配線構造と同じように、振動板接続部３１ａ側にコイルリード線や他の入力線等を配する必要性は全く無い。つまり、本発明では、コイルリード線端末部３１ｂ側にコイルリード線や他の入力線等を配する新たな配線構造で対応することができるので、工数削減、並びに品質の向上につながるものとなる。 When the coil lead wires 35a and 35b are pulled out from the winding start end portion 32a and the winding end end portion 32b and the audio signal input wires 37a and 37b are wired, the vibration is the same as in the conventional speaker wiring structure. There is no need to arrange coil lead wires or other input wires on the plate connecting portion 31a side. That is, in the present invention, it is possible to cope with a new wiring structure in which a coil lead wire, other input wires, etc. are arranged on the coil lead wire terminal portion 31b side, leading to reduction in man-hours and improvement in quality. .
　一方、磁気回路４は、平板状をした振動板を駆動するアクチュエータ用の反発型磁気回路であって、図５及び図６に示すように、一対の硬磁性部材４１Ａ，４１Ｂと、一対の軟磁性部材４２Ａ，４２Ｂを備える。 On the other hand, the magnetic circuit 4 is a repulsive magnetic circuit for an actuator that drives a flat plate-like diaphragm, and as shown in FIGS. 5 and 6, a pair of hard magnetic members 41A and 41B and a pair of soft magnetic members. Magnetic members 42A and 42B are provided.
　硬磁性部材４１Ａ，４１Ｂは、ボイスコイル３を配することが可能な空間４３を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して空間４３内に反発磁界を形成するように配されている。この硬磁性部材４１Ａ，４１Ｂとしては、たとえば、細長長方体をしたマグネットとすることができる。具体的には、たとえば、外形寸法が長さ４０ｍｍ×幅１０ｍｍ×厚さ２ｍｍで、耐熱性能１８０℃タイプの長方形状をしたネオジムマグネットを用いるものとすることができる。 The hard magnetic members 41 </ b> A and 41 </ b> B are separated so as to form a space 43 in which the voice coil 3 can be disposed, and one pole side having the same polarity is opposed to form a repulsive magnetic field in the space 43. It is arranged to do. As the hard magnetic members 41A and 41B, for example, a magnet having an elongated rectangular shape can be used. Specifically, for example, a neodymium magnet having a rectangular shape of a heat resistant performance 180 ° C. type having an outer dimension of 40 mm long × 10 mm wide × 2 mm thick can be used.
　また、硬磁性部材４１Ａ，４１Ｂの幅は、ボイスコイル３におけるコイル３２の巻き幅より大であることが望ましい。言い換えれば、反発型磁気回路４における硬磁性部材４１Ａ，４１Ｂの幅と、ボイスコイル３おけるコイル３２の巻き幅は等しい寸法であっても良いが、コイル３２の巻き幅は、硬磁性部材４１Ａ，４１Ｂの幅より小であると良い。すなわち、硬磁性部材４１Ａ，４１Ｂの幅がボイスコイル３におけるコイル３２の巻き幅より大であるので、ボイスコイル３が硬磁性部材４１Ａ，４１Ｂにおける空間４３内からはみ出さないように、ボイスコイル３の駆動を制限することができる。これにより、硬磁性部材４１Ａ，４１Ｂにおける空間４３内においてボイスコイル３が効率良く適切に駆動することができるものとなる。 The width of the hard magnetic members 41A and 41B is preferably larger than the winding width of the coil 32 in the voice coil 3. In other words, the widths of the hard magnetic members 41A and 41B in the repulsive magnetic circuit 4 and the winding width of the coil 32 in the voice coil 3 may be equal, but the winding width of the coil 32 is the same as that of the hard magnetic members 41A and 41A. It should be smaller than the width of 41B. That is, since the width of the hard magnetic members 41A and 41B is larger than the winding width of the coil 32 in the voice coil 3, the voice coil 3 is prevented from protruding from the space 43 in the hard magnetic members 41A and 41B. Can be limited. Thereby, the voice coil 3 can be efficiently and appropriately driven in the space 43 in the hard magnetic members 41A and 41B.
　また、軟磁性部材４２Ａ，４２Ｂは、一対のマグネット４１Ａ，４１Ｂを挟持するように他極面側にそれぞれ配された、いわゆるヨークであって、互いに接合されて一対のマグネット４１Ａ，４１Ｂを支持する。すなわち、一対のヨーク４２Ａ，４２Ｂは、一対のマグネット４１Ａ，４１Ｂを二方向より挟持するように支持する。
　このヨーク４２Ａ，４２Ｂは、当然のことながら、良好な磁性材たる鉄材からなるものであって、本実施の形態において、長手方向の表面を切削加工することで形成された細長凹状をしたマグネット装着部４２１Ａ，４２１Ｂを備えるものとなっている。 The soft magnetic members 42A and 42B are so-called yokes arranged on the other pole face side so as to sandwich the pair of magnets 41A and 41B, and are joined to each other to support the pair of magnets 41A and 41B. . That is, the pair of yokes 42A and 42B supports the pair of magnets 41A and 41B so as to sandwich the pair of magnets 41A and 41B from two directions.
The yokes 42A and 42B are, of course, made of an iron material which is a good magnetic material, and in the present embodiment, a magnet mounting having an elongated concave shape formed by cutting the surface in the longitudinal direction. The parts 421A and 421B are provided.
　一対のヨーク４２Ａ，４２Ｂは同じ形状であり、たとえば、外形寸法が長さ７２ｍｍ×幅１０ｍｍ×厚さ６ｍｍであって、マグネット装着部４２１Ａ，４２１Ｂとして、長手方向の表面にセンター振り分けで切削加工を施すことで、マグネット４１Ａ，４１Ｂを装着可能とする長さ４２ｍｍ×幅１０ｍｍの窪み平坦部が設けられている。 The pair of yokes 42A and 42B have the same shape. For example, the outer dimensions are 72 mm long × 10 mm wide × 6 mm thick, and the magnet mounting portions 421A and 421B are cut by centering on the surface in the longitudinal direction. As a result, a concave flat portion having a length of 42 mm and a width of 10 mm is provided so that the magnets 41A and 41B can be mounted.
　マグネット装着部４２１Ａ，４２１Ｂの肉厚は、ヨーク４２Ａ，４２Ｂの厚さを６ｍｍとした場合、たとえば、２ｍｍとすることができる。また、切削加工は、マグネット装着部４２１Ａ，４２１Ｂの両端部に半径３ｍｍの曲面加工をそれぞれ施し、さらに、この曲面加工部端から１ｍｍの垂直部を経て、厚さ６ｍｍ位置の上面に達するものとしても良い。 The thickness of the magnet mounting portions 421A and 421B can be set to 2 mm, for example, when the thickness of the yokes 42A and 42B is 6 mm. In addition, the cutting is performed by subjecting both ends of the magnet mounting portions 421A and 421B to curved surface processing with a radius of 3 mm, and further reaching the upper surface at a thickness of 6 mm through a vertical portion of 1 mm from the end of the curved surface processing portion. Also good.
　ここで、ヨーク４２Ａ，４２Ｂの外形寸法を、長さ７２ｍｍ×幅１０ｍｍ×厚さ６ｍｍとし、マグネット装着部４２１Ａ，４２１Ｂの両端部にＲ３ｍｍの曲面加工をそれぞれ施した場合、このヨーク４２Ａ，４２Ｂの両端部には、長さ１２ｍｍ、幅１０ｍｍの平面部４２４Ａ，４２４Ｂがそれぞれ形成される。この平面部４２４Ａ，４２４Ｂは、一対のヨーク４２Ａ，４２Ｂが組み合わされる合わせ面となる。 Here, when the outer dimensions of the yokes 42A and 42B are 72 mm long × 10 mm wide × 6 mm thick, and both end portions of the magnet mounting portions 421A and 421B are subjected to curved surface processing of R3 mm, the yokes 42A and 42B At both ends, flat portions 424A and 424B having a length of 12 mm and a width of 10 mm are formed, respectively. The flat portions 424A and 424B are mating surfaces on which the pair of yokes 42A and 42B are combined.
　また、一対のヨーク４２Ａ，４２Ｂは、一対のマグネット４１Ａ，４１Ｂによって形成された空間４３において一軸方向に開口領域が形成されるように配されている。この一軸方向は、ボイスコイル３が駆動する向きとなるものである。 Further, the pair of yokes 42A and 42B are arranged such that an opening region is formed in a uniaxial direction in the space 43 formed by the pair of magnets 41A and 41B. This uniaxial direction is the direction in which the voice coil 3 is driven.
　一対のマグネットは着磁されており、それぞれのＳ極面をヨーク４２Ａ，４２Ｂのマグネット装着部４２１Ａ，４２１Ｂに密着するようにそれぞれ装着する。ヨーク４２Ａ，４２Ｂに対するマグネット４１Ａ，４１Ｂの装着方法は特に限定せず、たとえば、接着剤を用いることで装着することができる。接着剤は、目的に適うものであれば何を使っても一向に差支えなく、たとえば、世間一般に用いられている、２液混合タイプのエポキシ系接着剤や、アクリル系接着剤等を用いてもよい。 The pair of magnets are magnetized, and the respective S pole surfaces are mounted so as to be in close contact with the magnet mounting portions 421A and 421B of the yokes 42A and 42B. A method for attaching the magnets 41A and 41B to the yokes 42A and 42B is not particularly limited, and for example, the magnets 41A and 41B can be attached by using an adhesive. Any adhesive can be used as long as it is suitable for the purpose. For example, a two-component mixed epoxy adhesive, an acrylic adhesive, or the like that is generally used by the public may be used. .
　そして、マグネット４１Ａ，４１ＢのＳ極面がマグネット装着部４２１Ａ，４２１Ｂに装着されたヨーク４２Ａ，４２Ｂの各両端部に設けた合わせ面（平面部）４２４Ａ，４２４Ｂ同士を互いに密着する。そうすると、マグネット４１Ａ，４１ＢのＮ極面同士を向き合わせた状態にて磁気回路が構成され、世間一般で呼ばれている反発磁気を利用した磁気回路、通称、反発磁気回路を形成することができる。 The S pole surfaces of the magnets 41A and 41B are brought into close contact with the mating surfaces (planar portions) 424A and 424B provided at both ends of the yokes 42A and 42B mounted on the magnet mounting portions 421A and 421B. Then, the magnetic circuit is configured with the N pole surfaces of the magnets 41A and 41B facing each other, and a magnetic circuit using repulsive magnetism, commonly called a repulsive magnetic circuit, generally called the world can be formed. .
　ヨーク４２Ａ，４２Ｂの組み合わせについては、たとえば、それぞれのヨーク４２Ａ，４２Ｂに対応したビス穴（Ｍ３貫通）４２５Ａ，４２５Ｂを設けておき、取り付けネジにて互いのヨーク４２Ａ，４２Ｂ同士を締結して組み合わせる。 As for the combination of the yokes 42A and 42B, for example, screw holes (M3 penetration) 425A and 425B corresponding to the respective yokes 42A and 42B are provided, and the yokes 42A and 42B are fastened and combined with mounting screws. .
　したがって、本発明のアクチュエータ２を組み立てる場合、図７及び図８に示すように、先ず、コイル線材の巻き端部を正面として、小判（長穴）形状、若しくは長方形に捲いてなるコイル形状とし、このコイル３２の中心線近傍に、所定寸法を有した方形振動伝達板３１を配置してなる構造のボイスコイル３とする。 Therefore, when assembling the actuator 2 of the present invention, as shown in FIG. 7 and FIG. 8, first, the winding end portion of the coil wire is set to the front, and the coil shape is formed in an oval (long hole) shape or a rectangle, A voice coil 3 having a structure in which a rectangular vibration transmission plate 31 having a predetermined dimension is arranged in the vicinity of the center line of the coil 32 is used.
　次いで、ボイスコイル３を駆動するために、一対のマグネット４１Ａ，４１Ｂの極性面を対向（反発）するように配置して反発磁気回路４を構成するとともに、コイル３２の長手方向外側に所定のクリアランス（隙間）２３，２３を設けて、一対のマグネット４１Ａ，４１Ｂが形成する反発磁界内にボイスコイル３を可動自在に配置する。すなわち、ボイスコイル３は、コイル３２が反発型磁気回路４における一対のマグネット４１Ａ，４１Ｂとクリアランス（隙間）２３，２３をもって空間４３内に配される。 Next, in order to drive the voice coil 3, the repulsive magnetic circuit 4 is configured by arranging the polar surfaces of the pair of magnets 41 </ b> A and 41 </ b> B to oppose (repel), and a predetermined clearance is provided outside the coil 32 in the longitudinal direction. (Gap) 23 and 23 are provided, and the voice coil 3 is movably disposed in a repulsive magnetic field formed by the pair of magnets 41A and 41B. That is, in the voice coil 3, the coil 32 is arranged in the space 43 with a pair of magnets 41 </ b> A and 41 </ b> B and clearances (gap) 23 and 23 in the repulsive magnetic circuit 4.
　このように、本発明に係るアクチュエータ２は、平板状をした振動板を駆動する音響機器用のアクチュエータであって、図２に示すように、ボイスコイル３と反発型磁気回路４から構成され、ボイスコイル３は、反発型磁気回路４における反発磁界内において、マグネット４１Ａ，４１Ｂと接触することなく可動自在なものとなっている。 As described above, the actuator 2 according to the present invention is an actuator for an acoustic device that drives a flat diaphragm, and includes a voice coil 3 and a repulsive magnetic circuit 4 as shown in FIG. The voice coil 3 is movable within the repulsive magnetic field in the repulsive magnetic circuit 4 without contacting the magnets 41A and 41B.
　これにより、ボイスコイル３がマグネット４１Ａ，４１Ｂと接することのない安定した可動が維持され、振動伝達板３１を介して連なった湾曲振動板１が正常且つ安定した振動状態を得ることができ、湾曲振動板１が有する音波を適切に発することができる。また、アクチュエータ２は、薄厚化・小型化されて構造上小さくスペースファクターを改善し、かつ、軽量化することが可能なものとすることができる。 Thereby, the stable movement without the voice coil 3 coming into contact with the magnets 41A and 41B is maintained, and the curved diaphragm 1 connected through the vibration transmission plate 31 can obtain a normal and stable vibration state. The sound wave which the diaphragm 1 has can be emitted appropriately. In addition, the actuator 2 can be made thinner and smaller so that the space factor can be improved and the weight can be reduced.
　また、本発明のアクチュエータ２において、ヨーク４２Ａ，４２Ｂにそれぞれ接着されたマグネット４１Ａ，４１Ｂは、同極（Ｎ極）同士が向きあうように装着されて反発磁気回路が形成しているので、この反発型磁気回路４の中にボイスコイル３を配置すると、マグネット４１Ａ，４１Ｂの表面よりボイスコイル３の振動伝達板３１方向に向かって磁気が放出されるものとなる。 Further, in the actuator 2 of the present invention, the magnets 41A and 41B bonded to the yokes 42A and 42B are mounted so that the same poles (N poles) face each other to form a repulsive magnetic circuit. When the voice coil 3 is disposed in the repulsive magnetic circuit 4, magnetism is emitted from the surfaces of the magnets 41 </ b> A and 41 </ b> B toward the vibration transmission plate 31 of the voice coil 3.
　このマグネット４１Ａ，４１Ｂの表面（Ｎ極面）からの磁気の流れは、次のとおりとなる。まず、コイル３２の長手方向を横切った後、水平方向（左右横方向）に向きを変えてヨーク４２Ａ，４２Ｂの両端部に向かい、さらに、コイル３２の長手方向両端部をそれぞれ横切る。その後、それぞれのヨーク４２Ａ，４２Ｂが磁路となって、ヨーク４２Ａ，４２Ｂの底部に設けてあるマグネット装着部４２１Ａ，４２１Ｂに向かい、このマグネット装着部４２１Ａ，４２１Ｂに密着しているマグネット４１Ａ，４１ＢのＳ極面に流れ込む。そして、マグネット４１Ａ，４１ＢのＳ極面からの磁気はＮ極側に向かい、再びマグネット４１Ａ，４１Ｂの表面（Ｎ極面）から放出される一連の流れを構成している。 The magnetic flow from the surfaces (N pole surfaces) of the magnets 41A and 41B is as follows. First, after traversing the longitudinal direction of the coil 32, the direction is changed in the horizontal direction (left and right lateral direction) to both ends of the yokes 42A and 42B, and further, both longitudinal ends of the coil 32 are traversed. Thereafter, the respective yokes 42A and 42B become magnetic paths and go toward the magnet mounting portions 421A and 421B provided at the bottoms of the yokes 42A and 42B, and the magnets 41A and 41B are in close contact with the magnet mounting portions 421A and 421B. Flows into the S pole face of And the magnetism from the south pole surface of magnet 41A, 41B goes to the north pole side, and comprises a series of flows discharged | emitted from the surface (north pole surface) of magnet 41A, 41B again.
　反発型磁気回路４においてボイスコイル３の駆動効率を向上させるには、マグネット４１Ａ，４１Ｂの表面から垂直に放出している磁気の流れを有効に使うことが肝要である。すなわち、マグネット４１Ａ，４１Ｂの片方の極の表面（Ｎ極表面）から大気中に放出した磁気は、弧を描くように、直ちに放出した反対の極の表面（Ｓ極表面）へ最も近い経路で戻るので、垂直方向の磁気分布は表面から極めて短い距離（高さ）でしか分布しない。ゆえに、コイル３２を効率良く稼働させるためには、マグネット４１Ａ，４１Ｂの表面に可能な限り接近した設置状態が好ましい。 In order to improve the driving efficiency of the voice coil 3 in the repulsive magnetic circuit 4, it is important to effectively use the magnetic flow emitted perpendicularly from the surfaces of the magnets 41A and 41B. That is, the magnetism emitted from the surface of one of the magnets 41A and 41B (N pole surface) into the atmosphere is the path closest to the surface of the opposite pole (S pole surface) that is immediately emitted so as to draw an arc. Since returning, the magnetic distribution in the vertical direction is distributed only at a very short distance (height) from the surface. Therefore, in order to operate the coil 32 efficiently, an installation state as close as possible to the surfaces of the magnets 41A and 41B is preferable.
　しかしながら、マグネット４１Ａ，４１Ｂ同士を反発状態で近づけ過ぎると、垂直方向に出ている磁気の流れがお互い左右方向、つまり、ヨーク４２Ａ，４２Ｂの端部方向に傾き、コイル３２の駆動にロスを生じる。　 However, if the magnets 41A and 41B are brought too close to each other in a repulsive state, the magnetic flows appearing in the vertical direction are inclined in the left-right direction, that is, in the direction of the end portions of the yokes 42A and 42B, causing a loss in driving the coil 32. . *
　一方、コイル３２が振幅可動するには、マグネット４１Ａ，４１Ｂとの間に当然適度なクリアランス２３，２３が必要である。ゆえに、コイル３２の長手方向の外側に構成されるコイル外側クリアランス２３は、ヨーク４２Ａ，４２Ｂの合わせ面、及びマグネット装着部４２１Ａ，４２１Ｂの厚さ寸法にて設定される。このクリアランスは、たとえば、機械加工公差寸法を含めて０．２ｍｍ～０．３ｍｍとすることができる。 On the other hand, in order for the coil 32 to move in amplitude, of course, appropriate clearances 23 and 23 are required between the magnets 41A and 41B. Therefore, the coil outer clearance 23 formed on the outer side in the longitudinal direction of the coil 32 is set by the thickness of the mating surfaces of the yokes 42A and 42B and the magnet mounting portions 421A and 421B. This clearance can be, for example, 0.2 mm to 0.3 mm including the machining tolerance dimension.
　したがって、前述したように、向かい合わせたマグネット４１Ａ，４１Ｂの距離を適切な位置に配置することが肝要であり、コイル３２の長手方向の内側と振動伝達板３１の表面とに適度な隙間（コイル内側クリアランス）３３を設けることが好ましい。このコイル内側クリアランス３３の最適寸法は、磁気解析等の分析によって得られるが、コイル外側クリアランス２３より大であることが望ましい。これにより、上述したように、マグネット４１Ａ，４１Ｂの表面（Ｎ極面）からの磁気がボイスコイル３の振動伝達板３１方向に向かって垂直に放出され、コイル３２の長手方向を横切って有効に流れてボイスコイル３の駆動効率を向上させるものとすることができる。 Therefore, as described above, it is important to arrange the distance between the magnets 41A and 41B facing each other at an appropriate position, and an appropriate gap (coil between the inner side in the longitudinal direction of the coil 32 and the surface of the vibration transmission plate 31 is required. It is preferable to provide an inner clearance 33. The optimum dimension of the coil inner clearance 33 is obtained by analysis such as magnetic analysis, but is preferably larger than the coil outer clearance 23. As a result, as described above, magnetism from the surfaces (N pole surfaces) of the magnets 41A and 41B is released vertically toward the direction of the vibration transmission plate 31 of the voice coil 3 and effectively across the longitudinal direction of the coil 32. Thus, the driving efficiency of the voice coil 3 can be improved.
　なお、反発型磁気回路４は、一対の加工部品によって２分割可能な構造を有してなる磁気回路構造であることが好ましい。これにより、組み立て部品を筐体側に装着することが極めて容易になり、量産化が可能な利点を有する。 The repulsive magnetic circuit 4 is preferably a magnetic circuit structure having a structure that can be divided into two parts by a pair of processed parts. This makes it extremely easy to mount the assembly component on the housing side, and has the advantage of enabling mass production.
　また、本発明のアクチュエータ２を用いて万能スピーカを組み立てる場合、ボイスコイル３を組み立てた後、振動伝達板３１の振動板接続部３１ａを構成する面と、湾曲振動板１の一端１ａを構成する面とを先に接続固定する。すなわち、アクチュエータ２が湾曲振動板１に対して振動を加えるように、振動板接続部３１ａを構成する面が湾曲振動板１の一端１ａを構成する面に接続されたものとしておく。 When assembling a universal speaker using the actuator 2 of the present invention, after assembling the voice coil 3, the surface constituting the diaphragm connecting portion 31 a of the vibration transmitting plate 31 and one end 1 a of the curved diaphragm 1 are constructed. Connect and fix the surface first. That is, the surface constituting the diaphragm connecting portion 31a is connected to the surface constituting the one end 1a of the curved diaphragm 1 so that the actuator 2 applies vibration to the curved diaphragm 1.
　次いで、図９に示すように、ボイスコイル３を装着した湾曲振動板１と磁気回路４とを組み合わせ、磁気回路取付けベース２１上に装着することで、アクチュエータ２を組み立てながら万能スピーカ１０を組み立てることができる。 Next, as shown in FIG. 9, the universal speaker 10 is assembled while assembling the actuator 2 by combining the curved diaphragm 1 with the voice coil 3 and the magnetic circuit 4 and mounting on the magnetic circuit mounting base 21. Can do.
　磁気回路取付けベース２１は、たとえば、長辺１００ｍｍ×短辺７０ｍｍ×厚さ６ｍｍの長方形をしたアルミニウムの板材を用いて形成することができる。この磁気回路取付けベース２１は、アルミニウム等の金属に限らず、たとえば木材や樹脂等、どの様な材料を用いても一向に構わない。 The magnetic circuit mounting base 21 can be formed using, for example, a rectangular aluminum plate having a long side of 100 mm, a short side of 70 mm, and a thickness of 6 mm. The magnetic circuit mounting base 21 is not limited to a metal such as aluminum, and any material such as wood or resin may be used.
　また、磁気回路取付けベース２１は、後述するように、筐体１１を構成する部品の一つとすることができる。すなわち、磁気回路取付けベース２１に側板や背板等の筐体部品を取り付け、湾曲振動板１を装着する筐体１１とすることができる。筺体１１を構成する場合、たとえば、磁気回路取付けベース２１の短辺側の板厚（木口）部分中心線上にネジ孔を設けると共に、側板にもこのネジ孔に対応する位置に穴を設け、この穴を介して取付けビスを用いて側板を締結装着する。他の筐体構成部品も取付けビスにて互いに装着することで筺体１１とすることができる。 Also, the magnetic circuit mounting base 21 can be one of the components constituting the housing 11, as will be described later. That is, the casing 11 to which the curved diaphragm 1 is attached can be obtained by attaching casing components such as a side plate and a back plate to the magnetic circuit mounting base 21. When the casing 11 is configured, for example, a screw hole is provided on the center line of the plate thickness (wood end) portion on the short side of the magnetic circuit mounting base 21, and a hole is also provided on the side plate at a position corresponding to the screw hole. The side plate is fastened and attached using mounting screws through the holes. Other housing components can also be attached to each other with mounting screws to form the casing 11.
　なお、側板等の筐体部品は、磁気回路取付けベース２１と同様に、目的を適える材料であればアルミニウム等の金属に限らず、たとえば、木材や樹脂等、どの様な材料を用いても一向に構わない。 As with the magnetic circuit mounting base 21, the casing parts such as side plates are not limited to metals such as aluminum as long as they are suitable for the purpose. For example, any material such as wood or resin may be used. It does n’t matter.
　そして、図１及び図２において白抜き矢印が示すように、ボイスコイル３に電気信号を引加することで、印加信号に伴った振動を起し、ボイスコイル３と接続された湾曲振動板１を駆動して音波を発生するもの（すなわち、実用上充分な音圧を得ることができるもの）となっている。なお、ボイスコイル３に印加される電気信号としては、たとえば、テレビやラジオ、オーディオプレイヤー、パーソナルコンピュータ、スマートフォンやタブレットなどのスマートデバイス、等より出力した音声信号を挙げることができる。 1 and 2, the curved diaphragm 1 connected to the voice coil 3 is caused to vibrate in accordance with the applied signal by applying an electric signal to the voice coil 3 as indicated by the white arrow. To generate sound waves (that is, a sound pressure sufficient for practical use can be obtained). Note that examples of the electrical signal applied to the voice coil 3 include an audio signal output from a television, a radio, an audio player, a personal computer, a smart device such as a smartphone or a tablet, or the like.
　また、本発明の万能スピーカ１０において湾曲振動板１は、平板状をし、一端１ａ側から対向する他端１ｂ側へ向かうにしたがって湾曲する曲面部を形成するように配される。湾曲振動板１が、予め湾曲する曲面部を有するように成形された部材の場合、この湾曲凸面が前方を向くようにアクチュエータ２に取り付ける。また、湾曲振動板１が、柔軟性を有する部材の場合、起立した平板状態でボイスコイル３（振動伝達板３１）に取り付けた後、この状態から弾性的に振動板１を曲げて変形させることにより曲面を形成し、この変形した湾曲凸面側を前方に向けてアクチュエータ２に取り付けるものとする。 Further, in the universal speaker 10 of the present invention, the curved diaphragm 1 has a flat plate shape and is arranged so as to form a curved surface portion that curves from the one end 1a side toward the opposite other end 1b side. In the case where the curved diaphragm 1 is a member formed so as to have a curved surface portion that is curved in advance, the curved diaphragm 1 is attached to the actuator 2 so that the curved convex surface faces forward. Further, when the curved diaphragm 1 is a flexible member, the diaphragm 1 is elastically bent and deformed from this state after being attached to the voice coil 3 (vibration transmission plate 31) in a standing flat state. A curved surface is formed by the above, and the deformed curved convex surface side is attached to the actuator 2 with the front side facing forward.
　本実施の形態では、図１０に示すように、湾曲振動板１と振動伝達板３１とが別々に構成されたものとし、湾曲振動板１の一端１ａと振動伝達板３１の振動板接続部３１ａとを接合するものとすることができる。その場合、本発明では、図１１において点線矢印で示すように、湾曲振動板１と振動伝達板３１との接合部を跨ぐように貼り合わせシート５１が貼着されるものとしても良い。 In the present embodiment, as shown in FIG. 10, the curved diaphragm 1 and the vibration transmitting plate 31 are configured separately, and one end 1 a of the curved diaphragm 1 and the diaphragm connecting portion 31 a of the vibration transmitting plate 31. And can be joined. In that case, in this invention, as shown by the dotted line arrow in FIG. 11, it is good also as what the bonding sheet | seat 51 adheres so that the junction part of the curved diaphragm 1 and the vibration transmission board 31 may be straddled.
　貼り合わせシート５１は、たとえば、幅５ｍｍ×長さ４０ｍｍのクラフト紙を用いて形成することができる。この貼り合わせシート５１は、単なるクラフト紙に限らず、たとえばＦＲＰ等の樹脂や、金属のシート状のもの、さらには、設計目的に適うものであれば厚さ３ｍｍ程のハニカム板等、何を用いても一向に構わない。また、貼り合わせシート５１は、湾曲振動板１と振動伝達板３１との接合部における表裏両面にそれぞれ貼着するように２枚用いるものや、設計目的を適える場合は何れか一面に貼着するように１枚だけ用いるものとしても構わない。 The bonded sheet 51 can be formed using, for example, kraft paper having a width of 5 mm and a length of 40 mm. This bonded sheet 51 is not limited to craft paper, but for example, a resin such as FRP, a metal sheet, or a honeycomb plate having a thickness of about 3 mm if it meets the design purpose. It does not matter if it is used. Moreover, the bonding sheet 51 is used in such a manner that two sheets are bonded to both the front and back surfaces of the joint portion of the curved diaphragm 1 and the vibration transmission plate 31, and is bonded to either one when the design purpose is suitable. As such, only one sheet may be used.
　湾曲振動板１と振動伝達板３１の接続は、たとえば、次のようにして行うことができる。まず、貼り合わせシート５１の片面に接着材を塗布しておく。次いで、湾曲振動板１と振動伝達板３１（ボイスコイル３）の接続部を所定の位置（たとえば、センター合わせ）で合わせ、接着剤塗布済みの貼り合わせシート５１を合わせ部の中心に跨ぐように配した後、湾曲振動板１と振動伝達板３１の表面に押し当てる。ゆえに、幅５ｍｍ×長さ４０ｍｍの貼り合わせシート５１を用いた場合、合わせ部を中心とすることで貼り代部は、湾曲振動板１と振動伝達板３１の表面にそれぞれ２．５ｍｍずつ貼着されるものとなる。 The connection of the curved diaphragm 1 and the vibration transmission plate 31 can be performed as follows, for example. First, an adhesive is applied to one side of the bonded sheet 51. Next, the connecting portion of the curved diaphragm 1 and the vibration transmitting plate 31 (voice coil 3) is aligned at a predetermined position (for example, center alignment), and the bonding sheet 51 to which the adhesive has been applied is straddled across the center of the alignment portion. After the arrangement, the curved diaphragm 1 and the vibration transmitting plate 31 are pressed against the surfaces. Therefore, when the bonding sheet 51 having a width of 5 mm and a length of 40 mm is used, the bonding margin portion is bonded to the surfaces of the curved diaphragm 1 and the vibration transmission plate 31 by 2.5 mm by centering the bonding portion. Will be.
　貼り合わせシート５１を貼着する接着剤は、たとえば、２液混合タイプのエポキシ系の接着剤とすることができる。このエポキシ系の接着剤は、所定量の主剤及び硬化剤を良く混合してから塗布するものであり、接着剤の塗布にはヘラを用いて行うことができる。 The adhesive for adhering the bonding sheet 51 can be, for example, a two-liquid mixed type epoxy adhesive. This epoxy adhesive is applied after a predetermined amount of the main agent and curing agent are mixed well, and the adhesive can be applied using a spatula.
　また、接着剤は、エポキシ系の接着剤以外に、ゴム系（溶剤系）接着剤や、水溶系の接着剤でも良い。これらの接着剤の場合、まず、貼り合わせシート５１に接着剤を塗布した後、一旦接着剤を乾燥させる。次いで、湾曲振動板１と振動伝達板３１（ボイスコイル３）の接続部を所定の位置に配置し、熱圧プレスにて貼り合わせシート部を加熱しつつ、所定時間加圧する。これにより、接着剤の熱再活性にて、湾曲振動板１と振動伝達板３１が良好な接着状態を得ることができる。この手法は、接着剤はみ出し部分も少なく、仕上がり状態も良好である。 Also, the adhesive may be a rubber-based (solvent-based) adhesive or a water-based adhesive in addition to the epoxy-based adhesive. In the case of these adhesives, first, the adhesive is applied to the bonded sheet 51, and then the adhesive is once dried. Subsequently, the connection part of the curved diaphragm 1 and the vibration transmission plate 31 (voice coil 3) is arrange | positioned in a predetermined position, and it pressurizes for a predetermined time, heating a bonding sheet part with a hot press. Thereby, the curved diaphragm 1 and the vibration transmission plate 31 can obtain a good adhesion state by thermal reactivation of the adhesive. This technique has few protruding parts of the adhesive and has a good finished state.
　また、熱圧プレス方法の場合、熱再活性方法のみではなく、エポキシ系等の熱硬化性接着剤を貼り合わせシートに塗布してプリプレグ状態にしておき、この貼り合わせシートを用いて熱圧プレスすることで、湾曲振動板１と振動伝達板３１とを接続するものとしても良い。つまり、これらの方法は、前もってシートに接着剤を塗布し、所望幅寸法幅に切断し、テープ状にして保管することが可能である。 In addition, in the case of the hot-pressing method, not only the thermal reactivation method but also a thermosetting adhesive such as an epoxy system is applied to the laminated sheet to be in a prepreg state, and the hot-pressed press using this laminated sheet By doing so, the curved diaphragm 1 and the vibration transmission plate 31 may be connected. That is, in these methods, it is possible to apply an adhesive to a sheet in advance, cut it into a desired width, and store it in a tape shape.
　したがって、貼り合わせ作業時には、この保管テープを製造現場に投入し、適宜切断しながら貼り合わせシートを用いることが可能となる。以上のことで、湾曲振動板１と振動伝達板３１の接続工程の接着剤塗布のムラや、貼り合わせ作業の煩雑性を大いに解消し、品質の向上、並びに、工数削減を実現することが可能となる。 Therefore, at the time of the bonding operation, the storage tape can be put into the manufacturing site, and the bonding sheet can be used while being appropriately cut. As described above, it is possible to greatly eliminate the unevenness of adhesive application in the connecting process of the curved diaphragm 1 and the vibration transmission plate 31 and the complexity of the bonding work, and to improve the quality and reduce the man-hours. It becomes.
　なお、貼り合わせシート５１への接着剤の塗布は比較的均一に可能であるが、振動伝達板３１の振動板接続部３１ａの板厚部への塗布は、塗布個所の幅が狭いため塗布ムラが発生してしまうおそれがある。当然のことながら、接着剤の塗布部を湾曲振動板１の一端１ａ側の板厚部に押し当てると、接着剤の殆どが湾曲振動板１と振動伝達板３１の表面側にはみ出すものとなる。しかしながら、本発明のように貼り合わせシート５１を配することで、はみ出した接着剤は貼り合わせシート５１の片面に塗布された接着剤に混じり込むものとなる。ゆえに、湾曲振動板１や振動伝達板３１の板厚部であっても、接着剤がはみ出ることを気にせず、塗布ムラが発生しないように接着剤を十分に塗布することができる。 Although the adhesive can be applied to the bonded sheet 51 relatively uniformly, the application to the plate thickness portion of the vibration plate connecting portion 31a of the vibration transmitting plate 31 is uneven because the width of the application portion is narrow. May occur. As a matter of course, when the adhesive application portion is pressed against the plate thickness portion on the one end 1 a side of the curved diaphragm 1, most of the adhesive protrudes to the surface side of the curved diaphragm 1 and the vibration transmission plate 31. . However, by disposing the bonding sheet 51 as in the present invention, the protruding adhesive is mixed with the adhesive applied to one side of the bonding sheet 51. Therefore, even if it is the plate | board thickness part of the curved diaphragm 1 or the vibration transmission board 31, it can fully apply | coat an adhesive so that application | coating may not generate | occur | produce without worrying about an adhesive protruding.
　貼り合わせシート５１の貼り合わせ作業においては、湾曲振動板１と振動伝達板３１と貼り合わせシート５１の位置関係が所望精度内に配置されることが肝要である。ゆえに、貼り合わせ作業においては、たとえば、簡易的な位置出し冶具を作製し、この冶具内に、湾曲振動板１と振動伝達板３１と接着剤塗布済みの貼り合わせシート５１を設置する。次いで、設置状態のまま冶具ごとプレス機等にて加圧し、湾曲振動板１と振動伝達板３１の表裏面に貼り合わせシート５１を圧定せしめる。さらに、室温にて所定時間（接着剤硬化時間）放置する。 In the bonding operation of the bonding sheet 51, it is important that the positional relationship among the curved diaphragm 1, the vibration transmitting plate 31, and the bonding sheet 51 is arranged within a desired accuracy. Therefore, in the bonding operation, for example, a simple positioning jig is prepared, and the bending vibration plate 1, the vibration transmission plate 31, and the bonding sheet 51 to which the adhesive has been applied are installed in the jig. Next, the jig and the jig are pressed with a press or the like in the installed state, and the bonded sheet 51 is pressed against the front and back surfaces of the curved diaphragm 1 and the vibration transmission plate 31. Further, it is left at room temperature for a predetermined time (adhesive curing time).
　そして、接着剤硬化後、加圧を解除して冶具から接着された湾曲振動板１及び振動伝達板３１を外すと、湾曲振動板１と振動伝達板３１とが貼り合わせシート５１を介して接着装着されたものとすることができる。なお、貼り合わせシート５１の外周部近傍には、接着剤塗布のムラの分だけ当然はみ出し部分が発生するが、剥離性の良い樹脂等で冶具を作製すると、貼り合わせシート５１を介して接着装着された湾曲振動板１及び振動伝達板３１をほとんど支障なく冶具から剥離することができる。また、金属等で冶具を作製した場合でも剥離用フィルム等を併用することで、接着剤がはみ出しても容易に冶具から外すことが可能となる。 Then, after the adhesive is cured, when the curved diaphragm 1 and the vibration transmitting plate 31 bonded from the jig are released by applying pressure, the curved diaphragm 1 and the vibration transmitting plate 31 are bonded via the bonding sheet 51. It can be attached. In addition, although the protrusion part naturally generate | occur | produces the part for the nonuniformity of adhesive application | coating near the outer peripheral part of the bonding sheet | seat 51, when a jig is produced with resin etc. with good peelability, it is adhesively attached via the bonding sheet | seat 51. The curved curved plate 1 and the vibration transmitting plate 31 can be peeled off from the jig with almost no trouble. Further, even when a jig is made of metal or the like, it is possible to easily remove the adhesive from the jig even if the adhesive protrudes by using a peeling film or the like together.
　このように、湾曲振動板１と振動伝達板３１との接合部に貼り合わせシート５１を貼着することで、湾曲振動板１と振動伝達板３１との接続装着強度が大幅に向上し、搬送や、後述する筐体１１への装着作業等において良好な作業性を得ることができる。また、歩留まり率が向上する効果を得ることができる。さらに、完成後の信頼性も大いに向上するものとなる。 Thus, by sticking the bonding sheet 51 to the joint between the curved diaphragm 1 and the vibration transmission plate 31, the connection mounting strength between the curved diaphragm 1 and the vibration transmission plate 31 is greatly improved, and the conveyance is performed. In addition, it is possible to obtain good workability in the mounting work to the housing 11 which will be described later. In addition, an effect of improving the yield rate can be obtained. Furthermore, the reliability after completion is greatly improved.
　本実施の形態における湾曲振動板１と振動伝達板３１との接合方法では、湾曲振動板１の面方向と同じ方向に駆動するように振動伝達板３１の一縁部が湾曲振動板１の端縁部と連続するように接合されて配されたものとなっている。ゆえに、その接合面積が円筒状をしたボイスコイルを用いる場合よりも大幅に増えたものとなり、十分な接合強度が得られる。また、振動伝搬効率が向上して再生周波数帯域が増し、特に高音帯域側の再生に有効であるものとすることができる。 In the joining method of the curved diaphragm 1 and the vibration transmitting plate 31 in the present embodiment, one edge of the vibration transmitting plate 31 is the end of the curved diaphragm 1 so as to drive in the same direction as the surface direction of the curved diaphragm 1. It is arranged so as to be continuous with the edge. Therefore, the joining area is greatly increased as compared with the case where a voice coil having a cylindrical shape is used, and a sufficient joining strength can be obtained. Further, the vibration propagation efficiency is improved and the reproduction frequency band is increased, and it can be particularly effective for reproduction on the high frequency band side.
　また、湾曲振動板１は、振動伝達板３１と同一部材（材質）により別々に形成されていても良いし、異なる部材（材質）により別々に形成されていても良い。この場合、それぞれ異なった部材によって形成することにより、目当ての音を得やすくなる利点があり、難聴度合いによって各個人に適合した音を提供することができる。 Moreover, the curved diaphragm 1 may be formed separately by the same member (material) as the vibration transmission plate 31, or may be formed separately by a different member (material). In this case, there is an advantage that the target sound can be easily obtained by using different members, and a sound suitable for each individual can be provided depending on the degree of hearing loss.
　なお、一体化部品においてコイルを接合する場合、一体化部品の振動伝達板相当部分にコイルを装着した後、振動伝達板相当部分の両側辺外側部及びコイルの短手領域内側の接触部に接着剤を塗布し、接着剤を硬化せしめるためオーブンに投入するものとなる。
　この際、一体化部品は当然のことながら、従来のボイスコイルの外形サイズより遥かに大きく占有面積が大きなものである。ゆえに、スペースファクターが悪化し、一個当たりの硬化効率が落ちる欠点が想定される。 When joining a coil in an integrated part, attach the coil to the vibration transmission plate equivalent part of the integrated part, and then bond it to the outer side of both sides of the vibration transmission plate equivalent part and the contact part inside the short side of the coil The agent is applied, and the adhesive is cured and then put into an oven.
In this case, as a matter of course, the integrated part is much larger than the external size of the conventional voice coil and occupies a large area. Therefore, it is assumed that the space factor deteriorates and the curing efficiency per piece decreases.
　そこで、簡単で安価なスペーサ等の冶具を用いることにより、一体化部品をオーブン内に立体的に積み重ね配置することを可能とし、スペースファクターが改善された良好なものとすることができる。したがって、本発明では、コストアップの要因はほとんど無く、一体化による工数削減、並びに軽量化が可能となり、音圧向上等より高性能化を図ることが可能となる。 Therefore, by using simple and inexpensive jigs such as spacers, the integrated parts can be three-dimensionally stacked and arranged in the oven, and the space factor can be improved. Therefore, in the present invention, there is almost no cause for cost increase, and it is possible to reduce man-hours and weight reduction by integration, and it is possible to improve performance by improving sound pressure and the like.
　また、難聴者と健聴者とが共に聞き取ることができるとされている剪断波は、振動板１の曲げにより発生し、この曲げ角度により発生音圧が変化するものである。ゆえに、湾曲振動板１は、曲面部の曲げ角度が９０°又はこれより少し大きいと望ましく、たとえば、曲げ角度が９０°から１３０°までであると良い。具体的には、発生音圧が一番大きくなるのは、１１０°±２０°の曲げ角度を有する曲面部を持った湾曲振動板１である。
　ここで曲面部の曲げ角度は、図１２に示すように、湾曲振動板１の一端１ａ側に対する垂線と他端１ｂ側に対する垂線とが交わることによって示される角度をいう。 Further, a shear wave that can be heard by both the hearing impaired person and the normal hearing person is generated by bending the diaphragm 1, and the generated sound pressure changes depending on the bending angle. Therefore, it is desirable for the curved diaphragm 1 that the bending angle of the curved surface portion is 90 ° or slightly larger, for example, the bending angle is 90 ° to 130 °. Specifically, the generated sound pressure is highest in the curved diaphragm 1 having a curved surface portion having a bending angle of 110 ° ± 20 °.
Here, as shown in FIG. 12, the bending angle of the curved surface portion refers to an angle indicated by the intersection of the perpendicular to the one end 1a side of the curved diaphragm 1 and the perpendicular to the other end 1b side.
　図１２において、平面状態の振動板１は点線で示され、この振動板１が、図中一点鎖線矢印で示すように、一端１ａ側から対向する他端１ｂ側へ向かうにしたがって湾曲する曲面部を形成するように折り曲げられた状態が実線で示されている。ゆえに、この時の湾曲振動板１の曲面部の曲げ角度は、その一端１ａ側に対する垂線と他端１ｂ側に対する垂線とが交わる点Ｏでの角度θで示され、その角度θは９０°から１３０°までが望ましいものとなっている。 In FIG. 12, the diaphragm 1 in a planar state is indicated by a dotted line, and the diaphragm 1 curves as it goes from the one end 1 a side to the other end 1 b side, as indicated by a one-dot chain line arrow in the figure. The state of being bent so as to form is shown by a solid line. Therefore, the bending angle of the curved surface portion of the curved diaphragm 1 at this time is indicated by an angle θ at a point O where the perpendicular to the one end 1a and the perpendicular to the other end 1b intersect, and the angle θ is 90 °. Up to 130 ° is desirable.
　また、本実施の形態においてアクチュエータ２は、ボイスコイル３における振動伝達板３１が、反発型磁気回路４において一対のマグネット４１Ａ，４１Ｂが形成する空間４３より一軸方向にはみ出る大きさを有するものとなっている。すなわち、振動伝達板３１は、振動板接続部３１ａ側がコイル３２の巻き幅方向の片側より延出露呈するものとなっている。たとえば、振動伝達板３１が４０ｍｍ角で、コイル３２の巻き幅が６ｍｍであると、振動板接続部３１ａ側が、コイル３２の巻き幅方向の片側より１０ｍｍ程度延出露呈するものとした場合、対向するコイルリード線端末部３１ｂ側が、コイル３２の巻き幅方向の他側より２４ｍｍ程度延出露呈した状態で配置されたものとなる。 In the present embodiment, the actuator 2 has a size in which the vibration transmission plate 31 in the voice coil 3 protrudes in the uniaxial direction from the space 43 formed by the pair of magnets 41A and 41B in the repulsive magnetic circuit 4. ing. That is, in the vibration transmission plate 31, the vibration plate connecting portion 31 a side is exposed from one side in the winding width direction of the coil 32. For example, when the vibration transmitting plate 31 is 40 mm square and the coil 32 has a winding width of 6 mm, the diaphragm connecting portion 31a side is exposed to extend about 10 mm from one side in the winding width direction of the coil 32. The coil lead wire terminal portion 31b side to be arranged is arranged in a state of being exposed and exposed by about 24 mm from the other side in the winding width direction of the coil 32.
　また、本発明では、振動伝達板３１のはみ出た領域の一部を、対向する二方向より弾性的に挟持するものと望ましい。すなわち、本発明においてアクチュエータ２は、ボイスコイル３における振動伝達板３１が、反発型磁気回路４において一対のマグネット４１Ａ，４１Ｂが形成する空間４３より一軸方向にはみ出る大きさを有するものとする。
　そして、図１３に示すように、振動伝達板３１の一方の端部、つまりコイルリード線端末部３１ｂ側の上面及び下面に、所望の厚さ寸法、所望の幅寸法、及び所望の長さ寸法を有するクッション材としての第一の支持部材６，６を配置する構造としても良い。 In the present invention, it is preferable that a part of the protruding region of the vibration transmission plate 31 is elastically sandwiched in two opposite directions. That is, in the present invention, the actuator 2 has such a size that the vibration transmission plate 31 in the voice coil 3 protrudes in the uniaxial direction from the space 43 formed by the pair of magnets 41A and 41B in the repulsive magnetic circuit 4.
Then, as shown in FIG. 13, a desired thickness dimension, a desired width dimension, and a desired length dimension are provided on one end of the vibration transmission plate 31, that is, on the upper surface and the lower surface on the coil lead wire terminal portion 31 b side. It is good also as a structure which arrange | positions the 1st support members 6 and 6 as a cushioning material which has these.
　この第一の支持部材６，６はシンプルな構造にもかかわらず、振幅時におけるコイル支持機能を極めて有効に発揮し、ボイスコイル３を支持するに充分なサスペンション機能を有するものとなる。 Although the first support members 6 and 6 have a simple structure, the first support members 6 and 6 exhibit a coil support function at the time of amplitude extremely effectively and have a suspension function sufficient to support the voice coil 3.
　また、本発明においては、図１４に示すように、振動伝達板３１のコイルリード線端末部３１ｂ側の上面及び下面に第一の支持部材６，６を配置すると共に、さらに振動伝達板３１の他方の端部、つまり振動板接続部３１ａ側の上面及び下面にも、所望の厚さ寸法、所望の幅寸法、及び所望の長さ寸法を有するクッション材としての第二の支持部材７，７を配置する構造としても良い。すなわち、本発明においてアクチュエータ２は、クッション材としての第一の支持部材６，６と第二の支持部材７，７とをサスペンションとして備えることにより、反発型磁気回路４を挟んで両側においてそれぞれ振動伝達板３１を弾性的に挟持するものとすることもできる。 Further, in the present invention, as shown in FIG. 14, the first support members 6 and 6 are disposed on the upper and lower surfaces of the vibration transmission plate 31 on the coil lead wire terminal portion 31 b side, and further, the vibration transmission plate 31. Second support members 7 and 7 as cushioning materials having desired thickness dimensions, desired width dimensions, and desired length dimensions on the other end, that is, the upper surface and the lower surface on the diaphragm connecting portion 31a side. It is good also as a structure which arranges. In other words, in the present invention, the actuator 2 includes the first support members 6 and 6 and the second support members 7 and 7 as cushion materials as suspensions, so that vibrations are generated on both sides of the repulsive magnetic circuit 4. The transmission plate 31 can be elastically sandwiched.
　これらの支持部材６，７には、軟質でかつ振動を伝えにくい材料を適用することができ、たとえば、発泡ウレタン樹脂やゴム、不織布等のような弾力性に富むシート材を挙げることができる。また、支持部材６，７は、たとえば、長さ５４ｍｍ×幅１２ｍｍ×厚さ８ｍｍの大きさをしたものとすることができる。
　このように、反発型磁気回路４を挟んで一軸方向にはみ出た振動伝達板３１の両側に支持部材６，７をそれぞれ備えるものとすると、より一層サスペンションの支持能力が向上する利点を有する。 For these support members 6 and 7, a soft material that hardly transmits vibration can be applied, and examples thereof include a highly elastic sheet material such as foamed urethane resin, rubber, and nonwoven fabric. The support members 6 and 7 may have a size of 54 mm length × 12 mm width × 8 mm thickness, for example.
As described above, if the support members 6 and 7 are provided on both sides of the vibration transmission plate 31 protruding in the uniaxial direction with the repulsive magnetic circuit 4 interposed therebetween, there is an advantage that the support capability of the suspension is further improved.
　また、アクチュエータ２において、振動伝達板３１の上面及び下面に支持部材（クッション材）６，７を配置して振動伝達板３１を弾性的に挟持すると、ボイスコイル２の振幅移動時に、振動伝達板３１が磁気回路内においてマグネット４１Ａ，４１Ｂの表面との間に設けたクリアランス２３，２３の寸法未満にて振幅移動が可能となる。これにより、ボイスコイル２の振幅移動中に、コイル３２がマグネット４１Ａ，４１Ｂの表面に接触して発する異常音が無くなるものとなる。 In the actuator 2, when support members (cushion members) 6 and 7 are disposed on the upper and lower surfaces of the vibration transmission plate 31 and the vibration transmission plate 31 is elastically clamped, the vibration transmission plate is moved during the amplitude movement of the voice coil 2. Amplitude movement is possible with a dimension 31 less than the dimensions of the clearances 23 and 23 provided between the surfaces of the magnets 41A and 41B in the magnetic circuit. Thereby, during the amplitude movement of the voice coil 2, the abnormal sound generated when the coil 32 contacts the surfaces of the magnets 41A and 41B is eliminated.
　また、これらの支持部材６，７は、支持部材押さえ板２２を用いて押さえ込みつつ装着される。支持部材押さえ板２２は、たとえば、厚さ２ｍｍのアルミニウム板を用い、幅３２ｍｍ×長さ６０ｍｍの大きさをしたものとすることができる。支持部材６，７を押さえ込みつつの支持部材押さえ板２２の装着については、たとえば、支持部材押さえ板２２に穴をそれぞれ設けると共に、ヨーク４２Ａ，４２Ｂにもこの穴に対応したビス穴（Ｍ３貫通）４２６Ａ，４２６Ｂを設けておく。そして、取り付けネジ４６にて支持部材押さえ板２２をヨーク４２Ｂの頂部平面に締結して装着する。 Further, these support members 6 and 7 are mounted while being pressed down using the support member pressing plate 22. The support member pressing plate 22 may be, for example, an aluminum plate having a thickness of 2 mm and a size of 32 mm width × 60 mm length. For mounting of the support member pressing plate 22 while pressing the support members 6 and 7, for example, holes are provided in the support member pressing plate 22, and screw holes corresponding to these holes are also provided in the yokes 42A and 42B (through M3). 426A and 426B are provided. Then, the supporting member pressing plate 22 is fastened to the top plane of the yoke 42B with the mounting screw 46 and attached.
　支持部材６，７を押さえ込みつつ支持部材押さえ板２２を装着するため、支持部材６，７は圧縮されて振動伝達板３１を上下両面から挟持する形態となる。具体的には、支持部材押さえ板２２の下面と磁気回路取付けベース２１の装着面との設計距離が１２ｍｍ、振動伝達板３１の厚さが０．２ｍｍ、支持部材６，７の厚さが８ｍｍであるとすると、支持部材６，７は２．１ｍｍ圧縮されつつ装着される。そして、圧縮によって発生するスプリングバック力が振動伝達板３１の装着位置を充分に保持しつつ、尚且つ、振幅運動を許容するサスペンション機能を充分に発揮することになる。 Since the support member pressing plate 22 is mounted while pressing the support members 6 and 7, the support members 6 and 7 are compressed to sandwich the vibration transmission plate 31 from both the upper and lower surfaces. Specifically, the design distance between the lower surface of the supporting member pressing plate 22 and the mounting surface of the magnetic circuit mounting base 21 is 12 mm, the thickness of the vibration transmitting plate 31 is 0.2 mm, and the thickness of the supporting members 6 and 7 is 8 mm. If so, the support members 6 and 7 are mounted while being compressed by 2.1 mm. The spring back force generated by the compression sufficiently holds the mounting position of the vibration transmission plate 31 and sufficiently exhibits the suspension function that allows the amplitude motion.
　そして、振動伝達板３１は、支持部材６，７によるスプリングバック力によって上下方向から押されつつ、１２ｍｍの寸法を有する空間の中心線上（６ｍｍ上）に保持される。これにより、コイル３２及びマグネット４１Ａ，４１Ｂの表面に構成されたコイル外側クリアランス２３，２３（たとえば、０．２ｍｍ～０．３ｍｍ）を維持しつつ、コイル２の振幅移動を可能ならしめるサスペンション機能を極めて安価で且つシンプルな構造にて得ることができる。 The vibration transmission plate 31 is held on the center line (6 mm above) of the space having a dimension of 12 mm while being pushed from above and below by the springback force by the support members 6 and 7. As a result, a suspension function that enables the coil 2 to move in amplitude while maintaining the coil outer clearances 23 and 23 (for example, 0.2 mm to 0.3 mm) formed on the surfaces of the coil 32 and the magnets 41A and 41B is provided. It can be obtained with a very inexpensive and simple structure.
　また、本発明において支持部材押さえ板２２は、熱伝導率の高い放熱機能を有する材料によって形成された放熱板とすると望ましい。これにより、ボイスコイル３の駆動に伴って発生する熱を、放熱板としての支持部材押さえ板２２を介して表面より放熱させることができる。 In the present invention, the support member pressing plate 22 is preferably a heat radiating plate formed of a material having a high heat conductivity and a heat radiating function. Thereby, the heat generated with the driving of the voice coil 3 can be radiated from the surface via the support member pressing plate 22 as a heat radiating plate.
　また、従来のスピーカ用磁気回路では、磁気ギャップを構成し、この磁気ギャップ中にボイスコイルを配置する。そのため、ボイスコイルの振幅移動方向における空間はボイスコイルボビン側のみであって、ボイスコイルは、ボビンを介してサスペンションから離れた位置で磁気ギャップ中に保持された、いわゆる片持ち支持構造となっている。ゆえに、コイルが振幅する際、些細なことでコイルと磁気ギャップが接触し、異常音が発生し易い構造となる。 In the conventional speaker magnetic circuit, a magnetic gap is formed, and a voice coil is arranged in the magnetic gap. Therefore, the space in the direction of amplitude movement of the voice coil is only on the voice coil bobbin side, and the voice coil has a so-called cantilever support structure held in the magnetic gap at a position away from the suspension via the bobbin. . Therefore, when the amplitude of the coil is small, the coil and the magnetic gap are in contact with each other, and an abnormal sound is easily generated.
　これに対し、本発明のアクチュエータ２では、反発磁気回路４は、磁気ギャップを構成してない構成である。そのため、ボイスコイル３の振幅移動方向における空間４３が、磁気回路の両方向、すなわち一軸方向に解放状態となっており、ボイスコイル３におけるコイル３２の近い位置に、支持部材６，７の装着が可能な構造となっている。ゆえに、ボイスコイル３の支持において極めて有利な構造であって、ボイスコイル３の振幅移動中にコイル３２とマグネット４１Ａ，４１Ｂとが接触し、異常音が発生してしまうことが無いものとすることができる。 On the other hand, in the actuator 2 of the present invention, the repulsive magnetic circuit 4 does not constitute a magnetic gap. Therefore, the space 43 in the direction of amplitude movement of the voice coil 3 is released in both directions of the magnetic circuit, that is, in one axis direction, and the support members 6 and 7 can be mounted in the voice coil 3 near the coil 32. It has a simple structure. Therefore, the structure is extremely advantageous in supporting the voice coil 3, and the coil 32 and the magnets 41A and 41B are not in contact with each other during the amplitude movement of the voice coil 3, so that no abnormal sound is generated. Can do.
　以上のように、本発明のアクチュエータ２は、マグネット４１Ａ，４１Ｂの表面より放出している磁気をボイスコイル３に有効に及ぼすことができると共に、薄厚化・小型化されて構造上小さくスペースファクターを改善し、かつ、軽量化することが可能なものとすることができる。 As described above, the actuator 2 of the present invention can effectively exert the magnetism emitted from the surfaces of the magnets 41A and 41B on the voice coil 3, and is thinned and miniaturized to have a small space factor due to its structure. It can be improved and can be reduced in weight.
　また、本発明では、図１５及び図１６に示すように、湾曲振動板１の駆動方向に沿う両側縁１ｃ，１ｃを支持する筐体１１をさらに備える万能スピーカ２０とすることもできる。すなわち、本発明の万能スピーカ２０は、難聴者と健聴者とが共に聞き取ることができるものであり、湾曲振動板１と、アクチュエータ２と、筐体１１とを少なくとも備えることにより構成される。本実施の形態の場合、筺体１１は、底板１２と、背板１３と、左右２枚の側板１４，１４とを少なくとも備える。 Further, in the present invention, as shown in FIGS. 15 and 16, the universal speaker 20 may further include a housing 11 that supports both side edges 1 c and 1 c along the driving direction of the curved diaphragm 1. That is, the universal speaker 20 of the present invention can be heard by both the hearing impaired person and the normal hearing person, and includes at least the curved diaphragm 1, the actuator 2, and the housing 11. In the case of the present embodiment, the housing 11 includes at least a bottom plate 12, a back plate 13, and two left and right side plates 14 and 14.
　２枚の側板１４，１４は、共に共通寸法であり、図１７に示すように、背板１３側に位置する縦辺部１４１と、底板１２側に位置する横辺部１４２と、磁気回路取付けベース２１側に位置する上辺部１４３を有する。また、上辺部１４３前方側から横辺部１４２前方側へ向けて、垂下する上辺段差部１４４、上辺段差部１４４から前方側に向かって弧状に突出するＲ部１４５、Ｒ部１４５から前方側に向かって略水平に突出する下辺段差部１４６、及び下辺段差部１４６から横辺部１４２へ達する下辺部１４７が連続して形成されるように有している。具体的には、縦辺部１４１が２３０ｍｍ、横辺部１４２が２００ｍｍ、上辺部１４３が６０ｍｍ、上辺段差部１４４が１２ｍｍ、下辺部１４７が２０ｍｍであり、Ｒ部１４５の開角度θが１１０°とすることができる。なお、図中の符号１４８・・１４８は何れもネジ孔を示す。 The two side plates 14 and 14 have common dimensions, and as shown in FIG. 17, a vertical side portion 141 located on the back plate 13 side, a horizontal side portion 142 located on the bottom plate 12 side, and a magnetic circuit attachment It has an upper side portion 143 located on the base 21 side. Moreover, the upper side step part 144 that hangs downward from the front side of the upper side part 143 toward the front side of the side part 142, the R part 145 that protrudes in an arc shape from the upper side step part 144 to the front side, and the front side from the R part 145 A lower side step part 146 that protrudes substantially horizontally toward the lower side part 146 and a lower side part 147 that reaches the side part 142 from the lower side step part 146 are formed continuously. Specifically, the vertical side portion 141 is 230 mm, the horizontal side portion 142 is 200 mm, the upper side portion 143 is 60 mm, the upper side step portion 144 is 12 mm, the lower side portion 147 is 20 mm, and the open angle θ of the R portion 145 is 110 °. It can be. Note that reference numerals 148 and 148 in the figure indicate screw holes.
　本発明での筺体１１はＲ部１４５を有することが大きな特徴の一つであり、このＲ部１４５が湾曲振動板１を支える基部となる。すなわち、湾曲振動板１を駆動して音波を発生するスピーカシステムの筐体構造においては、湾曲振動板１を装着する個所に、装着する湾曲振動板１が備える湾曲線に対応した曲線からなる曲線加工部（Ｒ部）１４５を設け、この曲線加工部１４５において湾曲振動板１の両側縁１ｃ，１ｃを受けて支持する構造が望ましい。本発明では、筐体１１を用いる場合、このような湾曲振動板１の装着が基本構造であって、極めて有効な筐体構造である。 The housing 11 in the present invention is one of the great features that it has an R portion 145, and this R portion 145 becomes a base portion that supports the curved diaphragm 1. That is, in the case structure of the speaker system that generates the sound wave by driving the curved diaphragm 1, a curve formed of a curve corresponding to the curved line included in the curved diaphragm 1 to be mounted at a position where the curved diaphragm 1 is mounted. It is desirable that a processing portion (R portion) 145 is provided and the curved processing portion 145 receives and supports both side edges 1c, 1c of the curved diaphragm 1. In the present invention, when the casing 11 is used, the mounting of the curved diaphragm 1 is a basic structure, which is an extremely effective casing structure.
　したがって、図１５から図１７までに示すように、湾曲振動板１の両側縁１ｃ，１ｃは、筐体１１の左右の側板１４を介して湾曲状に支持されている。具体的には、筐体１１の左右に設けられた側板１４，１４の端面をそれぞれＲ状に形成したＲ部１４５を用いて支持するものとなっている。 Therefore, as shown in FIGS. 15 to 17, both side edges 1 c and 1 c of the curved diaphragm 1 are supported in a curved shape via the left and right side plates 14 of the housing 11. Specifically, the end surfaces of the side plates 14, 14 provided on the left and right sides of the housing 11 are supported using R portions 145 each formed in an R shape.
　これにより、アクチュエータ２に取り付けられた起立状態の振動板１の両側縁１ｃ，１ｃは、Ｒ部１４５をガイドとしてその上面に沿って容易に曲折され、一端１ａから対向する他端１ｂへ向かうにしたがって湾曲する曲面部の形成を容易なものとして湾曲振動板１を配することができるものとなる。また、湾曲振動板１の両側縁部１ｃ，１ｃが筐体１１に支持されることで、湾曲振動板１が外力等の影響を受けることなく、エネルギーの伝達効率を低下させてしまうおそれを低減させることができるものとなる。 As a result, both side edges 1c and 1c of the standing diaphragm 1 attached to the actuator 2 are easily bent along the upper surface thereof with the R portion 145 as a guide, and are directed from the one end 1a to the opposite other end 1b. Therefore, the curved diaphragm 1 can be arranged to facilitate the formation of a curved surface portion. In addition, since both side edges 1c and 1c of the curved diaphragm 1 are supported by the housing 11, the possibility that the curved diaphragm 1 is reduced in energy transmission efficiency without being affected by external force or the like is reduced. It will be something that can be made.
　また、筺体１１は、図１５及び図１６に示すように、装着する湾曲振動板１の有する湾曲線に対応した曲線からなる切削加工等を側板１４に施した場合、この曲線加工部（Ｒ部）１４５に、所望の厚さ寸法、所望の幅寸法、及び所望の長さ寸法を有する弾性部材８を配置し、湾曲振動板１を弾性部材８により線接触で支持するものとしても良い。すなわち、本発明では、湾曲振動板１の両側縁１ｃ，１ｃの裏面に沿った状態で弾性部材８を密着させることが好ましい。 As shown in FIGS. 15 and 16, when the housing 11 is subjected to cutting processing or the like made of a curve corresponding to the curved line of the curved diaphragm 1 to be mounted on the side plate 14, the curved machining portion (R portion) ) An elastic member 8 having a desired thickness dimension, a desired width dimension, and a desired length dimension may be disposed at 145, and the curved diaphragm 1 may be supported by the elastic member 8 in line contact. That is, in the present invention, it is preferable that the elastic member 8 is brought into close contact with the back surfaces of the side edges 1c and 1c of the curved diaphragm 1.
　この弾性部材８には、支持部材６，７と同様に、軟質でかつ振動を伝えにくい材料を適用することができる。このような弾性部材８としては、たとえば、発泡ウレタン樹脂やゴム、不織布等のような弾力性に富むシート材を挙げることができる。 As the support members 6 and 7, a material that is soft and difficult to transmit vibration can be applied to the elastic member 8. As such an elastic member 8, for example, a sheet material having high elasticity such as foamed urethane resin, rubber, nonwoven fabric or the like can be used.
　また、弾性部材８は、側板１４のＲ部１４５の上面に全体的に配することが可能な長さを有していれば良く、この弾性部材８の上に湾曲振動板１を配することで、湾曲振動板１は、概ね弾性部材８の半径に馴染んだ形状になる。この弾性部材８の側板１４のＲ部１４５表面への取り付けは、たとえば、Ｒ部１４５表面へ両面粘着テープ貼り付けた後、この粘着テープ上に弾性部材８を貼り付けることで簡単に装着することができる。 Moreover, the elastic member 8 should just have the length which can be distribute | arranged to the whole upper surface of R part 145 of the side plate 14, and arrange | positions the curved diaphragm 1 on this elastic member 8. Thus, the curved diaphragm 1 has a shape generally adapted to the radius of the elastic member 8. The elastic member 8 can be attached to the surface of the R portion 145 of the side plate 14 by, for example, attaching the double-sided adhesive tape to the surface of the R portion 145 and then attaching the elastic member 8 on the adhesive tape. Can do.
　このように弾性部材８を介して湾曲振動板１を支持することで、湾曲振動板１が比較的自由に振動する反面、弾性部材８によって湾曲振動板１の側縁１ｃ部分に発生する反射波を効果的に吸収する機能が発揮される。ゆえに、湾曲振動板１の振動エネルギーが筐体１１へ伝わりにくくし、エネルギーの損失が少ないものとすることができる。 By supporting the curved diaphragm 1 through the elastic member 8 in this manner, the curved diaphragm 1 vibrates relatively freely, while the reflected wave generated at the side edge 1c portion of the curved diaphragm 1 by the elastic member 8. The function of effectively absorbing is exhibited. Therefore, it is possible to make it difficult for vibration energy of the curved diaphragm 1 to be transmitted to the casing 11, and to reduce energy loss.
　また、万能スピーカ２０は、湾曲振動板１と筐体１１との間の密閉された空間が形成されたものとなるので、振動板の表面（前面）から出た音波と裏面（背面）から出た音波は弾性部材８により遮断され、表面や裏面での音波の干渉減衰が起こらないものとなる。ゆえに、安定した音圧と広い周波数帯域特性が得られるものとすることができると共に、振動板の裏面側に発生する音波の音響共振を制御し易いものとすることができる。 In addition, the universal speaker 20 is formed with a sealed space between the curved diaphragm 1 and the housing 11, so that the sound wave emitted from the front surface (front surface) of the diaphragm and the back surface (rear surface) are output. The sound wave is blocked by the elastic member 8, and the sound wave does not cause interference attenuation on the front surface or the back surface. Therefore, stable sound pressure and wide frequency band characteristics can be obtained, and acoustic resonance of sound waves generated on the back side of the diaphragm can be easily controlled.
　すなわち、本発明では弾性部材８が、湾曲振動板１の振動を許容しつつ、湾曲振動板１を支えるサスペンション機能を効果的に発揮し、尚且つ、湾曲振動板１の裏面側に発した音波が、湾曲振動板１の表面側に回り込み、湾曲振動板１の表面側に発生した音波と干渉することを防ぐシーリング機能を発揮する。ゆえに、本発明では、湾曲振動板１の側縁１ｃに弾性部材８を配置することで、音響効果を高めた、たとえば、バスレフ構造を有する万能スピーカ２０とすることができる。しかも、弾性部材８は、湾曲振動板１と筐体１１の支持面（たとえば、側板１４のＲ部１４５上面）との接触による異音の発生等を防止するべく機能するものとなる。 That is, in the present invention, the elastic member 8 effectively exhibits a suspension function for supporting the curved diaphragm 1 while allowing the vibration of the curved diaphragm 1, and the sound wave emitted to the back side of the curved diaphragm 1. However, it exhibits a sealing function that prevents it from interfering with sound waves generated on the surface side of the curved diaphragm 1 by going around the surface side of the curved diaphragm 1. Therefore, in this invention, it can be set as the universal speaker 20 which improved the acoustic effect by arrange | positioning the elastic member 8 to the side edge 1c of the curved diaphragm 1, for example, which has a bass-reflex structure. Moreover, the elastic member 8 functions to prevent the generation of abnormal noise due to contact between the curved diaphragm 1 and the support surface of the housing 11 (for example, the upper surface of the R portion 145 of the side plate 14).
　また、本発明では、湾曲振動板１の両側縁１ｃ，１ｃは、対向する二方向（一面側と他面側）より挟持する弾性部材８，８を介して筐体１１に支持されているものとすると望ましい。すなわち、湾曲振動板１の両側縁１ｃ，１ｃの表裏両面に沿った状態で、所望の厚さ寸法、所望の幅寸法、及び所望の長さ寸法を有する弾性部材８，８を配置し、この弾性部材８をサスペンションとする構造とすると良い。これにより、湾曲振動板１は弾性部材８，８を介して筐体１１に確実に支持されるものとなる。 In the present invention, both side edges 1c and 1c of the curved diaphragm 1 are supported by the housing 11 via elastic members 8 and 8 sandwiched from two opposing directions (one side and the other side). This is desirable. That is, the elastic members 8 and 8 having a desired thickness dimension, a desired width dimension, and a desired length dimension are arranged in a state along both the front and back sides of the side edges 1c and 1c of the curved diaphragm 1, It is preferable that the elastic member 8 be a suspension. As a result, the curved diaphragm 1 is reliably supported by the housing 11 via the elastic members 8 and 8.
　また、本発明では、湾曲振動板１の側縁１ｃの表裏両面に沿って弾性部材８，８を装着した場合は、湾曲振動板１を挟み込んだ方向から弾性部材８に対して適度な圧力を加えることが好ましい。すなわち、本発明では、湾曲振動板１の両側縁１ｃ，１ｃの表裏両面に沿った状態で弾性部材８、８をそれぞれ密着させ、尚且つ、弾性部材８が側板１４のＲ部１４５方向へ僅かに押し込まれ、湾曲振動板１に対して圧力を加えて支持する構造とすると良い。 In the present invention, when the elastic members 8 and 8 are mounted along the front and back surfaces of the side edge 1c of the curved diaphragm 1, an appropriate pressure is applied to the elastic member 8 from the direction in which the curved diaphragm 1 is sandwiched. It is preferable to add. That is, in the present invention, the elastic members 8 and 8 are brought into close contact with each other along both the front and back sides of the side edges 1c and 1c of the curved diaphragm 1, and the elastic member 8 is slightly in the direction of the R portion 145 of the side plate 14. It is preferable that the curved diaphragm 1 be supported by applying pressure to the curved diaphragm 1.
　このように弾性部材８が適度な圧力で圧縮されつつ装着されると、この圧縮によって発生する弾性部材８のスプリングバック力が、湾曲振動板１の装着位置を充分に保持し、尚且つ、振幅運動を許容するサスペンション機能を有しつつ湾曲振動板１の筐体１１への装着を可能とする。また、弾性部材８は、ボイスコイル３の振動伝達板３１両面に均等に圧定力を加えることになり、より一層安定した保持能力を発揮し得て、ボイスコイル用サスペンションとしての機能が極めて向上する効果を奏することもできる。 When the elastic member 8 is mounted while being compressed with an appropriate pressure in this way, the springback force of the elastic member 8 generated by the compression sufficiently holds the mounting position of the curved diaphragm 1 and has an amplitude. The curved diaphragm 1 can be mounted on the housing 11 while having a suspension function that allows movement. In addition, the elastic member 8 applies a constant pressing force to both surfaces of the vibration transmission plate 31 of the voice coil 3, can exhibit a more stable holding ability, and the function as a suspension for the voice coil is extremely improved. The effect to do can also be produced.
　また、弾性部材８での圧定力は、湾曲振動板１が振動するに充分な自由度を与えつつ、且つ、装着位置からのズレを防止するに充分な保持力を有するものである。しかも、弾性部材８が圧縮されたことにより、湾曲振動板１１の裏面側に発生する音の漏れを防ぐシーリング効果をも有するものとなる。 Further, the compressive force of the elastic member 8 has a sufficient holding force to prevent deviation from the mounting position while giving a degree of freedom sufficient for the curved diaphragm 1 to vibrate. In addition, since the elastic member 8 is compressed, it also has a sealing effect for preventing sound leakage generated on the back surface side of the curved diaphragm 11.
　図１５及び図１６において、弾性部材８は、断面矩形状をした細長棒状部材からなるものとして示され、筐体１１の側板１４に形成されたＲ部１４５の上面を覆うように２つ重ねて配されている。また、湾曲振動板１の外側部（側縁１ｃ）は、表裏面が弾性部材８，８によって支持されたものとして示されている。ゆえに、２つの弾性部材８，８により湾曲振動板１の側縁１ｃを挟み込んで、湾曲振動板１と筐体１１との間の密閉された空間が形成されるものとなる。 15 and 16, the elastic member 8 is shown as an elongated rod-shaped member having a rectangular cross section, and two elastic members 8 are stacked so as to cover the upper surface of the R portion 145 formed on the side plate 14 of the housing 11. It is arranged. Further, the outer side (side edge 1 c) of the curved diaphragm 1 is shown as having the front and back surfaces supported by elastic members 8, 8. Therefore, the side edge 1c of the curved diaphragm 1 is sandwiched between the two elastic members 8 and 8, and a sealed space between the curved diaphragm 1 and the housing 11 is formed.
　本発明のサスペンション構造における弾性部材８は、従来のスピーカに用いられている、一般的にエッジ等と称されているサスペンションの如く熱圧成型方法等を用いずとも、発泡材ブロックをカットするだけで入手可能である。そのため、弾性部材８は容易に作製が可能で、成形用の金型も不要となる利点があり、結果的に安価に入手可能で、コストダウンに大いに有効なサスペンション構造であるといえる。 The elastic member 8 in the suspension structure of the present invention only cuts the foam block without using a hot-pressure molding method or the like like the suspension generally used as an edge or the like used in a conventional speaker. Is available at Therefore, the elastic member 8 can be easily manufactured, and there is an advantage that a molding die is not required. As a result, it can be said that the suspension structure can be obtained at a low cost and is very effective for cost reduction.
　また、弾性部材８を介して湾曲振動板１の両側縁１ｃ，１ｃを支持し、弾性部材８に一定の圧力を加えてなる構造においては、たとえば、所望幅寸法、所望長さ寸法、及び所望厚さ寸法からなる押えシート９にて、弾性部材８を押さえるようにしてなるサスペンション構造とすることができる。 In the structure in which both side edges 1c, 1c of the curved diaphragm 1 are supported via the elastic member 8 and a certain pressure is applied to the elastic member 8, for example, a desired width dimension, a desired length dimension, and a desired dimension A suspension structure in which the elastic member 8 is pressed by the presser sheet 9 having a thickness dimension can be obtained.
　この押えシート９は、たとえば、側板１４の上辺部１４３と下辺部１４７とに架け渡すことが可能な長さを有した細長帯状体であって、一端を側板１４の上辺部１４３に、他端を側板１４の下辺部１４７に、ビス等によってそれぞれ固定する。これにより、押えシート９は、弾性部材８を押さえつつ湾曲振動板１の両側縁１ｃ，１ｃを支持し、弾性部材８に一定の圧力を加えることができる。この押えシート９には、たとえば、細長帯状をしたポリプロピレン製シート材を用いることができる。 The presser sheet 9 is, for example, an elongated belt-like body having a length that can be bridged between the upper side portion 143 and the lower side portion 147 of the side plate 14, and has one end at the upper side portion 143 of the side plate 14 and the other end. Are fixed to the lower side portion 147 of the side plate 14 with screws or the like. Accordingly, the presser sheet 9 can support both side edges 1 c and 1 c of the curved diaphragm 1 while pressing the elastic member 8, and can apply a certain pressure to the elastic member 8. For example, a polypropylene sheet material having an elongated strip shape can be used for the presser sheet 9.
　以上のように、湾曲振動板１を駆動して音波を発生するスピーカシステムにおいて、より安価で、大いに性能向上が果たせ、尚且つ、信頼性も向上し、しかも量産対応可能なスピーカシステムを提供することが可能となる。
　尚、筺体１１には、湾曲振動板１の他端１ｂと底板１２との間に、筐体１１内部で発生した音の響きを外部に放出するための開口部１５が設けられているが、この開口部１５は設計目的に応じて設けなくても一向に構わない。 As described above, a speaker system that generates a sound wave by driving the curved diaphragm 1 is cheaper, can greatly improve performance, has improved reliability, and is capable of mass production. It becomes possible.
The housing 11 is provided with an opening 15 between the other end 1b of the curved diaphragm 1 and the bottom plate 12, for releasing sound generated in the housing 11 to the outside. The opening 15 may be provided in one direction even if it is not provided depending on the design purpose.
　本実施の形態における万能スピーカ２０では、図１６に示すように、アクチュエータ２を筐体１１に設置した後、ボイスコイル３（振動伝達板３１）の駆動振幅に対応した適度の緩みを設けるためのフォーミングを音声信号入力線３７（３７ａ，３７ｂ）に施す。また、音声信号入力線３７の端部を、磁気回路取付けベース２１に設けた切り欠き部１６に導き通過させる。そして、音声信号入力線３７を筺体１１の背板１３側に装着してあるスピーカシステム駆動用アンプ基盤１７の出力端子に及ぼし、半田付けにて接続配線する。 In the universal speaker 20 in the present embodiment, as shown in FIG. 16, after the actuator 2 is installed in the housing 11, an appropriate looseness corresponding to the drive amplitude of the voice coil 3 (vibration transmission plate 31) is provided. Forming is performed on the audio signal input line 37 (37a, 37b). Further, the end of the audio signal input line 37 is guided and passed through the notch 16 provided in the magnetic circuit mounting base 21. Then, the audio signal input line 37 is applied to the output terminal of the speaker system driving amplifier board 17 mounted on the back plate 13 side of the housing 11, and is connected and wired by soldering.
　また、本発明において、側板１４のＲ部１４５上面を用いて湾曲振動板１の側縁１ｃを支持するようにした場合、たとえば、図１８に示すように、弾性部材８に代えて、スパイクやインシュレータと呼ばれる円錐状、三角錐状、半球状をしたエッジ支持部材１８をＲ部１４５の上面に多数配置し、湾曲振動板１をエッジ支持部材１８により部分的に点接触で支持するものとしても良い。このエッジ支持部材１８は、たとえば、ゴム等の弾性素材、又は木材や石材、金属等の硬質素材から構成することができる。 In the present invention, when the side edge 1c of the curved diaphragm 1 is supported using the upper surface of the R portion 145 of the side plate 14, for example, as shown in FIG. A large number of conical, triangular pyramid, and hemispherical edge support members 18 called insulators may be arranged on the upper surface of the R portion 145, and the curved diaphragm 1 may be supported by the edge support member 18 partially in point contact. good. The edge support member 18 can be made of, for example, an elastic material such as rubber, or a hard material such as wood, stone, or metal.
　図１８において、エッジ支持部材１８は、円錐状をしたものとして示され、筐体１１の側板１４のＲ部１４５の上面に突出するように、均等間隔に１７個配されたものとして示されている。なお、エッジ支持部材１８の数は特に限定されるものではなく、適宜配することができる。 In FIG. 18, the edge support members 18 are shown as having a conical shape, and 17 edge support members 18 are arranged at equal intervals so as to protrude from the upper surface of the R portion 145 of the side plate 14 of the housing 11. Yes. Note that the number of edge support members 18 is not particularly limited, and can be appropriately arranged.
　このようにエッジ支持部材１８を介して湾曲振動板１を筐体１１で支持することで、湾曲振動板１が比較的自由に振動する反面、エッジ支持部材１８によって湾曲振動板１の振動エネルギーを吸収もしくは逃がして、振動が筐体１１へ伝わりにくく、エネルギーの損失が少ないものとすることができる。 In this way, the curved diaphragm 1 is supported by the housing 11 via the edge support member 18, so that the curved diaphragm 1 vibrates relatively freely, while the edge support member 18 generates vibration energy of the curved diaphragm 1. Absorbing or escaping, it is difficult for vibration to be transmitted to the casing 11, and energy loss can be reduced.
　なお、図示しないが、湾曲振動板１を部分的に点接触で支持するものとする場合、筐体１１の側板１４から内側に向かって突出するように、側板１４にエッジ支持部材１８を直接取り付けるものとしても良い。この場合、エッジ支持部材１８は、円錐状、三角錐状、半球状に限らず、円筒状とすることもできる。 Although not shown, when the curved diaphragm 1 is to be partially supported by point contact, the edge support member 18 is directly attached to the side plate 14 so as to protrude inward from the side plate 14 of the housing 11. It is good as a thing. In this case, the edge support member 18 is not limited to a conical shape, a triangular pyramid shape, or a hemispherical shape, but may be a cylindrical shape.
　このエッジ支持部材１８は、側板１４のＲ部１４５に限らず、後述するように、側板１４に形成したガイド座グリ部１７１の上面や、ガイド凹部１７２内の上面と下面、ガイド凸部１７３の上面、ガイド枠部の両側縁の上面に多数配置されたものとしても良い。これにより、湾曲振動板１の外側部（側縁１ｃ）の裏面もしくは表裏面は、それぞれを部分的に点接触で支持されるものとなる。 The edge support member 18 is not limited to the R portion 145 of the side plate 14, and as will be described later, the upper surface of the guide spot facing portion 171 formed on the side plate 14, the upper and lower surfaces in the guide concave portion 172, and the guide convex portion 173. It is good also as what is arrange | positioned many on the upper surface and the upper surface of the both-sides edge of a guide frame part. As a result, the back surface or the front and back surfaces of the outer side portion (side edge 1c) of the curved diaphragm 1 are partially supported by point contact.
　また、本発明では、湾曲振動板１は、一端１ａ側へ向かうにしたがって徐々に幅狭となっているものとしても良い。すなわち、湾曲振動板１と振動伝達板３１との接続部が直角的にえぐれたような形状であると、支持部材７近傍からの反射波によって定在波が発生し易いものとなる。しかしながら、図１９に示すように、湾曲振動板１と振動伝達板３１との接続部を直線的に連続した形状とすることで、定在波の発生を防ぎ、音質を向上させることができる。 In the present invention, the curved diaphragm 1 may be gradually narrowed toward the one end 1a. That is, when the connecting portion between the curved diaphragm 1 and the vibration transmitting plate 31 is formed in a right angle, a standing wave is likely to be generated by a reflected wave from the vicinity of the support member 7. However, as shown in FIG. 19, by forming the connecting portion between the curved diaphragm 1 and the vibration transmitting plate 31 in a linearly continuous shape, it is possible to prevent the occurrence of standing waves and improve the sound quality.
　図１９（Ａ）において、湾曲振動板１と振動伝達板３１とが別々の部品としてそれぞれ準備され互いに接合されると共に、湾曲振動板１の両側縁１ｃ，１ｃの間隔が一端１ａ側へ向かうにしたがって直線状に徐々に幅狭となっている湾曲振動板１Ｂの一部が示されている。また、図１９（Ｂ）において、湾曲振動板１と振動伝達板３１とが別々の部品としてそれぞれ準備され互いに接合されると共に、湾曲振動板１の両側縁１ｃ，１ｃの間隔が一端１ａ側へ向かうにしたがって曲線状に徐々に幅狭となっている湾曲振動板１Ｃの一部が示されている。 In FIG. 19A, the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side. Therefore, a part of the curved diaphragm 1B that is gradually narrowed linearly is shown. In FIG. 19B, the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side. A part of the curved diaphragm 1C gradually narrowing in a curved shape as it goes is shown.
　また、本発明では、湾曲振動板１の一端１ａ側を徐々に幅狭とするのではなく、振動伝達板３１の振動板接続部３１ａ側を湾曲振動板１の一端１ａ側へ向かうにしたがって徐々に幅広となるものとし、湾曲振動板１と振動伝達板３１との接続部を直線的に連続した形状としても良い。 Further, in the present invention, the one end 1 a side of the curved diaphragm 1 is not gradually narrowed, but gradually, as the diaphragm connecting portion 31 a side of the vibration transmitting plate 31 moves toward the one end 1 a side of the curved diaphragm 1. The connecting portion between the curved diaphragm 1 and the vibration transmitting plate 31 may be linearly continuous.
　また、本発明では、湾曲振動板１は、一端側の両側上縁角部が丸みを帯びているものとしても良い。すなわち、湾曲振動板１の角部１ｄが直線的な尖ったものであると、支持部材７近傍からの反射波によって定在波が発生し易いものとなる。しかしながら、図２０に示すように、湾曲振動板１の上縁角部１ｄを曲線的な丸みを帯びたものとすることで、より定在波の発生を防ぎ、音質を向上させることができる。 In the present invention, the curved diaphragm 1 may have rounded upper corners on both sides on one end side. That is, if the corner 1d of the curved diaphragm 1 is a straight point, a standing wave is likely to be generated by a reflected wave from the vicinity of the support member 7. However, as shown in FIG. 20, when the upper edge corner 1d of the curved diaphragm 1 is rounded, the generation of standing waves can be further prevented and the sound quality can be improved.
　図２０（Ａ）において、湾曲振動板１と振動伝達板３１とが別々の部品としてそれぞれ準備され互いに接合されると共に、湾曲振動板１の両側縁１ｃ，１ｃの間隔が一端１ａ側へ向かうにしたがって直線状に徐々に幅狭となり、かつ、両側縁１ｃ，１ｃの上縁角部１ｄが丸みを帯びている湾曲振動板１Ｄの一部が示されている。また、図２０（Ｂ）において、湾曲振動板１と振動伝達板３１とが別々の部品としてそれぞれ準備され互いに接合されると共に、湾曲振動板１の両側縁１ｃ，１ｃの間隔が一端１ａ側へ向かうにしたがって曲線状に徐々に幅狭となり、かつ、両側縁１ｃ，１ｃの上縁角部１ｄが丸みを帯びている湾曲振動板１Ｅの一部が示されている。 In FIG. 20A, the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side. Therefore, a part of the curved diaphragm 1D is shown in which the width gradually decreases linearly, and the upper edge corners 1d of both side edges 1c, 1c are rounded. In FIG. 20B, the curved diaphragm 1 and the vibration transmitting plate 31 are prepared as separate parts and joined to each other, and the distance between the side edges 1c and 1c of the curved diaphragm 1 is toward the one end 1a side. A part of the curved diaphragm 1E is shown in which the width gradually decreases in a curved line and the upper edge corners 1d of both side edges 1c and 1c are rounded.
　さらに、本発明では、湾曲振動板１と振動伝達板３１は貼り合わせシート５１を用いることにより一体化せず、予め湾曲振動板１と振動伝達板３１とを同一部材により一体的に形成したもの（以下、「振動板伝達板一体化部品」という）としても良い。これにより、更なる高性能化と、信頼性を発揮し、接続部における接続作業の工数削減に大いに効果を発揮することができる。 Further, in the present invention, the curved diaphragm 1 and the vibration transmission plate 31 are not integrated by using the bonding sheet 51, and the curved vibration plate 1 and the vibration transmission plate 31 are integrally formed in advance by the same member. (Hereinafter referred to as “diaphragm transmission plate integrated part”). As a result, further improvement in performance and reliability can be exhibited, and a great effect can be achieved in reducing the number of man-hours for connection work in the connection portion.
　図２１において、予め湾曲振動板１領域と振動伝達板３１領域とが一体的に形成され、湾曲振動板１領域の両側縁１ｃ，１ｃの間隔が振動伝達板３１領域側へ向かうにしたがって曲線状に徐々に幅狭となり、かつ、両側縁１ｃ，１ｃの上縁角部１ｄが丸みを帯びている振動板伝達板一体化部品１３１が示されている。 In FIG. 21, the curved diaphragm 1 region and the vibration transmission plate 31 region are integrally formed in advance, and the curved diaphragm 1 region has a curved shape as the distance between both side edges 1c, 1c is directed toward the vibration transmission plate 31 region. A diaphragm transmission plate integrated part 131 is shown in which the width gradually decreases and the upper edge corners 1d of both side edges 1c, 1c are rounded.
　本実施の形態においては、筐体１１の側板１４の厚さ部分、木工業界用語で呼ぶところの木口（こぐち）部分に曲線加工を施したが、たとえば、筐体１１で多用されると想定される、木質板や合板、パーティクルボード等を加工する場合、本発明では、湾曲振動板１に対応した曲線加工部が、後述するように、ザグリ或いは溝等の加工形状であっても一向に構わない。しかも、これらの加工はルーター加工で容易に行え、安価に行える効果を有する。 In the present embodiment, the thickness portion of the side plate 14 of the housing 11 and the kerf portion referred to in terms of woodworking industry are subjected to curving, but for example, it is assumed that the housing 11 is frequently used. In the present invention, when processing a wood board, plywood, particle board or the like, the curved machining portion corresponding to the curved diaphragm 1 may be processed in a straight shape, such as a counterbore or a groove, as will be described later. Absent. Moreover, these processes can be easily performed by router processing and have the effect of being inexpensive.
　すなわち、湾曲振動板１の両側縁１ｃ，１ｃは、筐体１１の左右の側板１４の前面側端縁に形成されたＲ部１４５上に限らず、たとえば、図２２に示すように、筐体１１の左右の側板１４の内面にそれぞれ設けられた、湾曲したガイド座グリ部１７１を用いて支持されているものとしても良い。
　これにより、湾曲振動板１の両側縁１ｃ，１ｃは、ガイド座グリ部１７１の上面に沿って容易に曲折されることで支持されるので、一端１ａから対向する他端１ｂへ向かうにしたがって湾曲する曲面部の形成を容易なものとすることができる。 That is, both side edges 1c and 1c of the curved diaphragm 1 are not limited to the R portion 145 formed on the front side edge of the left and right side plates 14 of the casing 11, but for example, as shown in FIG. 11 and the left and right side plates 14 may be supported by using curved guide counterbore portions 171 provided on the inner surfaces thereof.
As a result, the side edges 1c and 1c of the curved diaphragm 1 are supported by being easily bent along the upper surface of the guide counterbore part 171. Therefore, the curved diaphragm 1 curves toward the other end 1b facing from the one end 1a. It is possible to easily form the curved surface portion.
　また、ガイド座グリ部１７１に弾性部材８を配し、この弾性部材８を介して湾曲振動板１の両側縁１ｃ，１ｃを支持するものとすれば、湾曲振動板１が筐体１１に固定されることなく比較的自由に振動することができる反面、弾性部材８によって湾曲振動板１の振動エネルギーが筐体１１へ伝わりにくく、エネルギーの損失が少ないものとすることができる。 Further, if the elastic member 8 is arranged on the guide counterbore part 171 and the both side edges 1 c and 1 c of the curved diaphragm 1 are supported via the elastic member 8, the curved diaphragm 1 is fixed to the housing 11. However, the elastic member 8 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 11, and the loss of energy can be reduced.
　また、湾曲振動板１の両側縁１ｃ，１ｃは、たとえば、図２３に示すように、筐体１１の左右の側板１４の内面にそれぞれ設けられた、湾曲したガイド凹部１７２を用いて支持されているものとしても良い。
　これにより、湾曲振動板１の両側縁１ｃ，１ｃは、ガイド凹部１７２に挿し入れることで容易に曲折・支持されるので、一端１ａから対向する他端１ｂへ向かうにしたがって湾曲する曲面部の形成を容易なものとすることができる。 Further, both side edges 1c and 1c of the curved diaphragm 1 are supported by using curved guide recesses 172 provided on the inner surfaces of the left and right side plates 14 of the housing 11, for example, as shown in FIG. It is good as well.
As a result, the side edges 1c and 1c of the curved diaphragm 1 are easily bent and supported by being inserted into the guide recess 172, so that a curved surface portion that is curved from the one end 1a toward the other end 1b is formed. Can be made easy.
　また、ガイド凹部１７２内の上面と下面に弾性部材８，８をそれぞれ配し、この弾性部材８を介して湾曲振動板１の両側縁１ｃ，１ｃを挟持するように支持するものとすれば、湾曲振動板１が筐体１１に固定されることなく比較的自由に振動することができる反面、ガイド凹部１７２によって湾曲振動板１の振動エネルギーが筐体１１へ伝わりにくく、エネルギーの損失が少ないものとすることができる。 Further, if elastic members 8 and 8 are respectively disposed on the upper surface and the lower surface in the guide recess 172, and the both side edges 1 c and 1 c of the curved diaphragm 1 are supported via the elastic member 8, The curved diaphragm 1 can vibrate relatively freely without being fixed to the casing 11, but the vibration energy of the curved diaphragm 1 is hardly transmitted to the casing 11 by the guide recess 172, and the energy loss is small. It can be.
　また、側板１４に対して曲線加工が不可能な場合、湾曲振動板１の有する湾曲線に対応した形状の付加部品を作製しても一向に構わない。したがって、湾曲振動板１の両側縁１ｃ，１ｃは、たとえば、図２４に示すように、筐体１１の左右の側板１４の内面にそれぞれ設けられた、湾曲したガイド凸部１７３を用いて支持されているものとしても良い。
　これにより、湾曲振動板１の両側縁１ｃ，１ｃは、ガイド凸部１７３の上面に沿って容易に曲折されることで支持されるので、一端１ａから対向する他端１ｂへ向かうにしたがって湾曲する曲面部の形成を容易なものとすることができる。 Further, when the side plate 14 cannot be curved, it is possible to produce additional parts having shapes corresponding to the curved lines of the curved diaphragm 1. Therefore, both side edges 1c and 1c of the curved diaphragm 1 are supported by using curved guide convex portions 173 provided on the inner surfaces of the left and right side plates 14 of the housing 11, for example, as shown in FIG. It may be good.
As a result, the side edges 1c and 1c of the curved diaphragm 1 are supported by being easily bent along the upper surface of the guide convex portion 173, so that the curved diaphragm 1 curves as it goes from the one end 1a to the opposite other end 1b. The curved surface portion can be easily formed.
　また、ガイド凸部１７３の上面に弾性部材８を配し、この弾性部材８を介して湾曲振動板１の両側縁１ｃ，１ｃを支持するものとすれば、湾曲振動板１が筐体１１に固定されることなく比較的自由に振動することができる反面、弾性部材８によって湾曲振動板１の振動エネルギーが筐体１１へ伝わりにくく、エネルギーの損失が少ないものとすることができる。 Further, if the elastic member 8 is disposed on the upper surface of the guide convex portion 173 and the both side edges 1 c and 1 c of the curved diaphragm 1 are supported via the elastic member 8, the curved diaphragm 1 is attached to the housing 11. While it can vibrate relatively freely without being fixed, the elastic member 8 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 11, and the loss of energy can be reduced.
　また、側板１４に対して曲線加工が不可能な場合、たとえば、図２５に示すように、湾曲振動板１に対応した曲線形状のバッフルを作製し、このバッフルを含んで筐体１１を構成しても良い。バッフルは、木工技術、或いは樹脂成型技術、金属プレス技術等、目的に応じてバッフルの材料を使い分けることが可能な利点を有する。したがって、湾曲振動板１の両側縁１ｃ，１ｃは、筐体１１の左右の側板１４の内面に架け渡すように設けられた、湾曲したガイド枠部１７４を用いて支持されているものとしても良い。
　これにより、湾曲振動板１の両側縁１ｃ，１ｃは、ガイド枠部１７４の上面に沿って容易に曲折されることで支持されるので、一端１ａから対向する他端１ｂへ向かうにしたがって湾曲する曲面部の形成を容易なものとすることができる。 When the side plate 14 cannot be curved, for example, as shown in FIG. 25, a curved baffle corresponding to the curved diaphragm 1 is produced, and the casing 11 is configured by including this baffle. May be. The baffle has an advantage that the material of the baffle can be properly used according to the purpose, such as woodworking technology, resin molding technology, metal press technology, or the like. Therefore, both side edges 1c and 1c of the curved diaphragm 1 may be supported by using the curved guide frame portion 174 provided so as to span the inner surfaces of the left and right side plates 14 of the housing 11. .
As a result, the side edges 1c and 1c of the curved diaphragm 1 are supported by being easily bent along the upper surface of the guide frame portion 174, so that the curved diaphragm 1 bends from the one end 1a toward the opposite other end 1b. The curved surface portion can be easily formed.
　また、ガイド枠部１７４の両側縁の上面に弾性部材８を配し、この弾性部材８を介して湾曲振動板１の両側縁１ｃ，１ｃを支持するものとすれば、湾曲振動板１が筐体１１に固定されることなく比較的自由に振動することができる反面、弾性部材８によって湾曲振動板１の振動エネルギーが筐体１１へ伝わりにくく、エネルギーの損失が少ないものとすることができる。 Further, if the elastic member 8 is disposed on the upper surface of the both side edges of the guide frame portion 174 and the both side edges 1c and 1c of the curved diaphragm 1 are supported via the elastic member 8, the curved diaphragm 1 is mounted on the housing. Although it can vibrate relatively freely without being fixed to the body 11, the elastic member 8 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 11, and the loss of energy can be reduced.
　また、本発明の万能スピーカは、湾曲振動板１の一端側に、アクチュエータ２が複数取り付けられているものとしても良い。すなわち、図２６に示すように、湾曲振動板１に対して２つのアクチュエータ２をそれぞれ取り付けた構造を有する万能スピーカ３０とすることができる。 Further, the universal speaker of the present invention may have a plurality of actuators 2 attached to one end side of the curved diaphragm 1. That is, as shown in FIG. 26, a universal speaker 30 having a structure in which two actuators 2 are attached to the curved diaphragm 1 can be obtained.
　図２６において、２つのアクチュエータ２，２は何れも磁気回路取付けベース２１に固定して取り付けられ、また、湾曲振動板１は、その端縁部が２つのアクチュエータ２，２の各振動伝達板３１，３１と接合するように配されたものとして示されている。また、音声信号入力線３７の端部は、磁気回路取付けベース２１に設けた切り欠き部１６を通過し、筺体１１の背板１３側に装着してあるスピーカシステム駆動用のアンプ基盤１７の出力端子と接続配線したものとなっている。 In FIG. 26, the two actuators 2 and 2 are both fixedly attached to the magnetic circuit mounting base 21, and the curved vibration plate 1 has the edge portions of the vibration transmission plates 31 of the two actuators 2 and 2. , 31 are shown as being arranged to be joined. The end of the audio signal input line 37 passes through the notch 16 provided in the magnetic circuit mounting base 21 and is output from the amplifier base 17 for driving the speaker system mounted on the back plate 13 side of the housing 11. It is connected to the terminal.
　このような万能スピーカ３０は、同一の湾曲振動板１の端面部を、２つのアクチュエータ２，２によって駆動することにより、一つのアクチュエータ２では上限のある音声エネルギーを複数のアクチュエータ２，２で駆動し、より大きな剪断波、粗密波を湾曲振動板１から発生させることが出来る。ゆえに、音量が高く鮮明な放音をすることが期待できるものとなる。 Such an all-purpose speaker 30 drives the end surface of the same curved diaphragm 1 by two actuators 2 and 2, so that one actuator 2 drives upper limit sound energy by a plurality of actuators 2 and 2. In addition, larger shear waves and dense waves can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.
　また、本発明の万能スピーカは、湾曲振動板１の他端側にもさらに他のアクチュエータ２が取り付けられているものとしても良い。すなわち、図２７に示すように、湾曲振動板１の一方の端縁部に対して第一のアクチュエータ２Ａを取り付け、同他方の端縁部に対して第二のアクチュエータ２Ｂを取り付けた構造を有する万能スピーカ４０とすることができる。 In addition, the universal speaker of the present invention may further include another actuator 2 attached to the other end side of the curved diaphragm 1. That is, as shown in FIG. 27, the first actuator 2A is attached to one end edge of the curved diaphragm 1, and the second actuator 2B is attached to the other end edge. The universal speaker 40 can be used.
　なお、本発明においては、たとえば、第一のアクチュエータ２Ａと第二のアクチュエータ２Ｂとを共に上述した本発明のアクチュエータ２としたり、何れか一方を公知のムービングコイル方式のアクチュエータやムービングマグネット方式のアクチュエータとしたりしても良い。 In the present invention, for example, the first actuator 2A and the second actuator 2B are both the actuator 2 of the present invention described above, or one of them is a known moving coil type actuator or moving magnet type actuator. Or you can do it.
　図２７において、万能スピーカ４０は、第一のアクチュエータ２Ａは筺体１１の背板１３側に固定して取り付けられ、一方、第二のアクチュエータ２Ｂは筺体１１の底板１２側に固定して取り付けられたものとして示されている。また、湾曲振動板１は、その一方の端縁部が第一のアクチュエータ２Ａの振動伝達板３１と接合し、他方の端縁部が第二のアクチュエータ２Ｂの振動伝達板３１と接合したものとなっている。 In FIG. 27, the universal speaker 40 has the first actuator 2A fixed and attached to the back plate 13 side of the housing 11, while the second actuator 2B is fixed and attached to the bottom plate 12 side of the housing 11. Shown as a thing. The curved diaphragm 1 has one edge joined to the vibration transmission plate 31 of the first actuator 2A and the other edge joined to the vibration transmission plate 31 of the second actuator 2B. It has become.
　このような万能スピーカ４０は、湾曲振動板１の異なる端面をそれぞれ異なるアクチュエータ２Ａ，２Ｂで駆動することにより、一つのアクチュエータでは上限のある発音エネルギーを複数のアクチュエータ２（２Ａ，２Ｂ）で駆動し、より大きな剪断波、粗密波を湾曲振動板１から発生させることが出来る。ゆえに、音量が高く鮮明な放音をすることが期待できるものとなる。 In such a universal speaker 40, different end faces of the curved diaphragm 1 are driven by different actuators 2A and 2B, respectively, so that a single actuator drives sound generation energy having an upper limit by a plurality of actuators 2 (2A and 2B). Larger shear waves and dense waves can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.
　また、本発明では、万能スピーカ４０において、図２７に示すように、電気信号を幾つかの周波数帯域に分割する手段１９をさらに備え、分割した各電気信号を互いに異なるアクチュエータにそれぞれ入力するものとしても良い。すなわち、図２７において白抜き矢印で示すように、二つのアクチュエータ２Ａ，２Ｂに入力される単一の音声信号の帯域を、アナログまたは電子的フィルター等の音声信号分割装置１９によって二つの周波数帯域に分割する。 In the present invention, as shown in FIG. 27, the universal speaker 40 further includes means 19 for dividing the electric signal into several frequency bands, and the divided electric signals are respectively input to different actuators. Also good. That is, as shown by white arrows in FIG. 27, the band of a single audio signal input to the two actuators 2A and 2B is divided into two frequency bands by an audio signal dividing device 19 such as an analog or electronic filter. To divide.
　そして、出力の一方を第一の音声信号入力線３７を介して第一のアクチュエータ２Ａに入力し、出力の他方を第二の音声信号入力線５７を介して第二のアクチュエータ２Ｂに入力する。そうすると、一つの湾曲振動板１が二つのアクチュエータ２Ａ，２Ｂによって駆動されるものとなり、湾曲振動板１における一端側と他端側とで異なる再生帯域の剪断波、粗密波を同時に得て、全体的に再生帯域の広い剪断波、粗密波を得ることが出来る。 Then, one of the outputs is input to the first actuator 2A via the first audio signal input line 37, and the other output is input to the second actuator 2B via the second audio signal input line 57. Then, one curved diaphragm 1 is driven by the two actuators 2A and 2B, and shear waves and dense waves having different reproduction bands on one end side and the other end side of the curved diaphragm 1 can be obtained at the same time. In particular, shear waves and coarse waves with a wide reproduction band can be obtained.
　また、本発明では、湾曲振動板１の曲面部上に圧電体（圧電素子）を利用したアクチュエータをさらに備えているものとしても良い。すなわち、図２８に示すように、湾曲振動板１の一端１ａに対して本発明に係る第一のアクチュエータ２を取り付けると共に、湾曲振動板１の曲面部に対して圧電体を利用した第二のアクチュエータ５２をさらに取り付けた構造を有する万能スピーカ５０とすることができる。 In the present invention, an actuator using a piezoelectric body (piezoelectric element) may be further provided on the curved surface portion of the curved diaphragm 1. That is, as shown in FIG. 28, the first actuator 2 according to the present invention is attached to one end 1 a of the curved diaphragm 1, and a second material using a piezoelectric body is used for the curved surface portion of the curved diaphragm 1. It can be set as the universal speaker 50 which has the structure where the actuator 52 was further attached.
　図２８において、第二のアクチュエータ５２は、湾曲振動板１の曲面部中央裏面に貼着されたものとして示されている。この第二のアクチュエータ５２は、湾曲振動板１の曲面部中央裏面に限らず、音声信号を入力するための配線に支障が無ければ湾曲振動板１の曲面部中央表面に貼着されたものとしても良い。 28, the second actuator 52 is shown as being attached to the central rear surface of the curved surface portion of the curved diaphragm 1. This second actuator 52 is not limited to the central back surface of the curved surface portion of the curved diaphragm 1, and is attached to the central surface of the curved surface portion of the curved diaphragm 1 as long as there is no problem with wiring for inputting audio signals. Also good.
　圧電体は、圧力を加えると、圧力に比例して自体変形する圧電効果を有する物質であり、アクチュエータは、加えられた電圧を力に変換する圧電効果を利用した圧電素子である。圧電素子は、電圧をかけることで一方向に伸縮（振動）する。ゆえに、図２８に示すように、湾曲振動板１の一端１ａに対して本発明に係る第一のアクチュエータ２を取り付け、湾曲振動板１の曲面部に対して圧電体を利用した第二のアクチュエータ５２を貼り付けた構造を有する万能スピーカ５０とすることができる。この圧電素子５２は、セラミックスや、ＰＶＤＦ（ポリフッ化ビニリデン）等の高分子、セラミックスと高分子との複合体などからなるものとすることができる。 The piezoelectric body is a substance having a piezoelectric effect that deforms itself in proportion to the pressure when a pressure is applied, and the actuator is a piezoelectric element that uses the piezoelectric effect to convert the applied voltage into a force. The piezoelectric element expands and contracts (vibrates) in one direction when a voltage is applied. Therefore, as shown in FIG. 28, the first actuator 2 according to the present invention is attached to one end 1 a of the curved diaphragm 1, and the second actuator using a piezoelectric material for the curved surface portion of the curved diaphragm 1. It can be set as the universal speaker 50 which has the structure where 52 was affixed. The piezoelectric element 52 can be made of ceramics, a polymer such as PVDF (polyvinylidene fluoride), a composite of ceramics and a polymer, or the like.
　このような万能スピーカ５０は、湾曲振動板１の端面と曲面とをそれぞれ異なるアクチュエータ２，５２で駆動することにより、一つのアクチュエータでは上限のある発音エネルギーを複数のアクチュエータ２，５２で駆動し、より大きな剪断波、粗密波を湾曲振動板１から発生させることが出来る。ゆえに、音量が高く鮮明な放音をすることが期待できるものとなる。 Such a universal speaker 50 drives the end face and the curved surface of the curved diaphragm 1 with different actuators 2 and 52, respectively, so that a single actuator drives a sounding energy having an upper limit with a plurality of actuators 2 and 52, Larger shear waves and dense waves can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.
　また、本発明では、万能スピーカ５０において、図２９に示すように、電気信号を幾つかの周波数帯域に分割する手段１９をさらに備え、分割した各電気信号を互いに異なるアクチュエータにそれぞれ入力するものとしても良い。すなわち、上述した万能スピーカ４０と同様、図２９において白抜き矢印で示すように、二つのアクチュエータ２，５２に入力される単一の音声信号の帯域を、アナログまたは電子的フィルター等の音声信号分割装置１９によって二つの周波数帯域に分割する。 In the present invention, as shown in FIG. 29, the universal speaker 50 further includes means 19 for dividing the electric signal into several frequency bands, and the divided electric signals are respectively input to different actuators. Also good. That is, as with the above-described universal speaker 40, as indicated by the white arrows in FIG. 29, the band of a single audio signal input to the two actuators 2 and 52 is divided into audio signals such as analog or electronic filters. The device 19 divides the frequency band into two frequency bands.
　そして、出力の一方を第一の音声信号入力線３７を介して第一のアクチュエータ２に入力し、出力の他方を第二の音声信号入力線５７を介して第二のアクチュエータ５２に入力する。そうすると、一つの湾曲振動板１が二つのアクチュエータ２，５２によって駆動されるものとなり、湾曲振動板１における一端側と他端側とで異なる再生帯域の剪断波、粗密波を同時に得て、全体的に再生帯域の広い剪断波、粗密波を得ることが出来る。 Then, one of the outputs is input to the first actuator 2 via the first audio signal input line 37, and the other of the outputs is input to the second actuator 52 via the second audio signal input line 57. Then, one curved diaphragm 1 is driven by the two actuators 2 and 52, and shear waves and dense waves in different reproduction bands are obtained simultaneously on one end side and the other end side of the curved diaphragm 1, and the whole is obtained. In particular, shear waves and coarse waves with a wide reproduction band can be obtained.
　また、本発明では、圧電体を利用した第二のアクチュエータ５２は、上述のように、湾曲振動板１の曲面部中央に限らず、図３０及び図３１に示すように、湾曲振動板１の一端１ａに対して本発明に係る第一のアクチュエータ２を取り付けると共に、湾曲振動板１の曲面部他端１ｂ側近傍に対して圧電体を利用した第二のアクチュエータ５２をさらに取り付けた構造を有する万能スピーカ６０とすることができる。 In the present invention, the second actuator 52 using a piezoelectric body is not limited to the center of the curved surface portion of the curved diaphragm 1 as described above, but as shown in FIGS. The first actuator 2 according to the present invention is attached to the one end 1a, and the second actuator 52 using a piezoelectric body is further attached to the vicinity of the other end 1b side of the curved surface portion of the curved diaphragm 1. The universal speaker 60 can be used.
　図３０及び図３１において、第二のアクチュエータ５２は、湾曲振動板１の曲面部他端１ｂ側裏面に貼着されているものとして示されている。また、二つのアクチュエータ２，５２に入力される単一の音声信号の帯域を音声信号分割装置１９によって二つの周波数帯域に分割し、出力の一方を第一の音声信号入力線３７を介して第一のアクチュエータ２に入力し、出力の他方を第二の音声信号入力線５７を介して第二のアクチュエータ５２に入力するものとして示されている。この第二のアクチュエータ５２は、湾曲振動板１の曲面部他端１ｂ側裏面に限らず、音声信号を入力するための配線に支障が無ければ湾曲振動板１の曲面部他端１ｂ側表面に貼着されたものとしても良い。 30 and FIG. 31, the second actuator 52 is shown as being attached to the back surface of the curved diaphragm 1 on the other end 1b side. In addition, a single audio signal band input to the two actuators 2, 52 is divided into two frequency bands by the audio signal dividing device 19, and one of the outputs is sent through the first audio signal input line 37. It is shown that the signal is input to one actuator 2 and the other output is input to the second actuator 52 via the second audio signal input line 57. The second actuator 52 is not limited to the back surface of the curved diaphragm 1 on the curved surface other end 1b side, and is not provided on the curved surface other end 1b surface of the curved diaphragm 1 if there is no problem with wiring for inputting an audio signal. It may be affixed.
　さらに、図示しないが、この第二のアクチュエータは、湾曲振動板の曲面部に対して１つに限らず、たとえば、湾曲振動板の曲面部中央と曲面部他端側にそれぞれ貼着するなど、２以上が貼着されたものとしても良い。 Further, although not shown, this second actuator is not limited to one for the curved surface portion of the curved diaphragm, for example, it is attached to the center of the curved surface portion and the other end of the curved surface portion of the curved diaphragm, etc. Two or more may be attached.
　なお、図２８乃至図３１において、第二のアクチュエータ５２は、長方形（短冊形）をした圧電素子として示されているが、丸形をした圧電素子としても良い。これにより、湾曲振動板１への取付け位置や取付け個数など、適宜設計変更をすることができる。 In FIG. 28 to FIG. 31, the second actuator 52 is shown as a rectangular (striped) piezoelectric element, but may be a round piezoelectric element. Thereby, design changes, such as the attachment position to the curved diaphragm 1 and the number of attachments, can be made as appropriate.
　以上のように、本発明の万能スピーカは、アクチュエータが薄厚化・小型化されて構造上小さくスペースファクターが改善され、かつ、軽量化することを可能とすると共に、振動板とアクチュエータとが実用的な接合強度を有し、振動伝搬効率を向上させて高周波域の出力が良好なものとすることができる。 As described above, the universal speaker according to the present invention has an actuator that is thin and small in size, has a small structure, has improved space factor, and can be reduced in weight, and a diaphragm and an actuator are practical. Therefore, it is possible to improve the vibration propagation efficiency and improve the output in the high frequency range.
　また、本発明では、図３２に示すように、第二のスピーカユニット１２０をさらに備えるハイブリッド型の万能スピーカ７０としても良い。すなわち、アクチュエータ２によって湾曲振動板１をその面方向と同じ方向に駆動させることで放音するスピーカユニット（以下、「第一のスピーカユニット」という。）１１０は、難聴者と健聴者とが共に聞き取ることができる音波を発生させることができるものの、再生帯域及び音質面から鑑みるに、健聴者においては明らかな喪失（不満）感を伴う状況が発生する場合がある。 In the present invention, as shown in FIG. 32, a hybrid universal speaker 70 further including a second speaker unit 120 may be used. That is, the speaker unit 110 (hereinafter referred to as “first speaker unit”) 110 that emits sound by driving the curved diaphragm 1 in the same direction as the surface direction by the actuator 2 is used by both the hearing impaired and the normal hearing. Although a sound wave that can be heard can be generated, in view of the reproduction band and sound quality, a situation with a clear sense of loss (dissatisfaction) may occur in a normal hearing person.
　そこで、本発明では、健聴者の喪失（不満）感を減少させるために、一般的な音響機器に組み込まれているスピーカユニットを第二のスピーカユニット１２０としてさらに、第一のスピーカユニット１１０を備える筐体１１に組み込んだ（付加した）ものとしている。ゆえに、第一のスピーカユニット１１０は、難聴者向けの音声を放つスピーカユニットとして主に機能することになり、第二のスピーカユニット１２０は、健聴者向けの音声を放つスピーカユニットとして主に機能するものといえる。 Therefore, in the present invention, in order to reduce the feeling of loss (dissatisfaction) of a normal hearing person, a speaker unit incorporated in a general audio device is used as a second speaker unit 120, and the first speaker unit 110 is further provided. It is assumed that it is incorporated in (added to) the housing 11. Therefore, the first speaker unit 110 mainly functions as a speaker unit that emits sound for a hearing impaired person, and the second speaker unit 120 mainly functions as a speaker unit that emits sound for a normal hearing person. It can be said that.
　この第二のスピーカユニット１２０は、音質面で健聴者の高音質感を満足させる広帯域再生が可能なスピーカユニットであり、たとえば、動電型スピーカユニットを挙げることができる。また、望ましい動電型スピーカユニットとしては、たとえば、ダイナミック型スピーカユニットを挙げることができる。さらに、望ましいダイナミック型スピーカユニットとしては、たとえば、コーン型スピーカユニットを挙げることができる。 The second speaker unit 120 is a speaker unit capable of wide-band reproduction that satisfies the high-quality sound quality of a normal hearing person in terms of sound quality, and examples thereof include an electrodynamic speaker unit. Moreover, as a desirable electrodynamic speaker unit, for example, a dynamic speaker unit can be cited. Furthermore, as a desirable dynamic type speaker unit, for example, a cone type speaker unit can be cited.
　この第二のスピーカユニット（たとえば、ダイナミックコーン型スピーカ）の取付位置は特に限定されず、湾曲振動板が配されている前面開口部を除く位置であれば、底板１２、背板１３、側板１４、等の何れであっても良い。 The mounting position of the second speaker unit (for example, dynamic cone type speaker) is not particularly limited, and the bottom plate 12, the back plate 13, and the side plate 14 may be any positions excluding the front opening where the curved diaphragm is disposed. Any of these may be used.
　図３２において、第二のスピーカユニット１２０は、筐体１１の底板１２に取り付けられたものとして示されている。また、筺体１１の内部は、第一のスピーカユニット１１０と第二のスピーカユニット１２０における音響的キャビティをそれぞれ形成するように隔壁によって区画されている。 32, the second speaker unit 120 is shown as being attached to the bottom plate 12 of the housing 11. Further, the interior of the housing 11 is partitioned by partition walls so as to form acoustic cavities in the first speaker unit 110 and the second speaker unit 120, respectively.
　また、本発明におけるハイブリッド型の万能スピーカ７０は、音域を分割してそれぞれのスピーカユニットにて再生するもの、すなわち、音声信号を特定の周波数ごとに分けて再生されるように個々のスピーカユニットへ印加して再生するものではなく、分配器５９によって単純に分けられた同一の音声信号を個々のスピーカユニットへ印加するものである。 Also, the hybrid type universal speaker 70 according to the present invention is one that divides a sound range and reproduces it by each speaker unit, that is, to each speaker unit so that an audio signal is reproduced for each specific frequency. It is not applied and reproduced, but the same audio signal simply divided by the distributor 59 is applied to each speaker unit.
　このように、湾曲振動板を駆動させる方式のスピーカユニット（すなわち、第一のスピーカユニット）と、一般的な音響機器に組み込まれている動電型や圧電型のスピーカユニット（すなわち、第二のスピーカユニット）とを組み合わせたハイブリッド型の万能スピーカとすることにより、スピーカの万能性が向上し、難聴者と健聴者とが共に満足して聞くことのできるスピーカを提供することができる。 As described above, the speaker unit (ie, the first speaker unit) that drives the curved diaphragm and the electrodynamic or piezoelectric speaker unit (ie, the second speaker unit) that is incorporated in general acoustic equipment. By combining the speaker unit with a hybrid type universal speaker, the universality of the speaker can be improved, and a speaker that can be heard by both a hearing impaired person and a normal hearing person can be provided.
　また、このようなハイブリッド型の万能スピーカとしては、第一のスピーカユニット１１０のアクチュエータを、たとえば、図３３に示すように、ムービングマグネット方式もしくはムービングコイル方式のアクチュエータ８２へ換えた導電振動スピーカユニットとするものや、図３４に示すように、圧電体を利用したアクチュエータ９２へ換えた圧電振動スピーカユニットとするものとしても良い。 As such a hybrid type universal speaker, a conductive vibration speaker unit in which the actuator of the first speaker unit 110 is replaced with a moving magnet type or moving coil type actuator 82 as shown in FIG. 33, for example. As shown in FIG. 34, a piezoelectric vibration speaker unit may be used instead of the actuator 92 using a piezoelectric body.
　ムービングマグネット方式のアクチュエータは、円筒凹状をしたカップ状のヨークの内壁面にボイスコイルが配されると共に、その内側にマグネット（永久磁石）が設けられた円柱状のポールピースが配された構成とするものである。この場合の第一のスピーカユニットは、ポールピースの上部に設けられた振動板駆動部を介して、電気信号の印加によるマグネット（ポールピース）の往復動としての運動エネルギーを湾曲振動板へ伝達し、湾曲振動板の面方向に対して平行な振動を加えて音声を発生させるものとなっている。 The moving magnet type actuator has a configuration in which a voice coil is arranged on the inner wall surface of a cylindrical cup-shaped yoke and a columnar pole piece with a magnet (permanent magnet) provided inside thereof. To do. In this case, the first speaker unit transmits the kinetic energy as the reciprocating motion of the magnet (pole piece) by applying the electric signal to the curved diaphragm through the diaphragm driving unit provided on the top of the pole piece. A sound is generated by applying a vibration parallel to the surface direction of the curved diaphragm.
　一方、ムービングコイル方式のアクチュエータは、円板状をしたヨークの中央部に円柱状のポールピースを設け、このポールピースが中心となるように、ヨーク上にリング形状のマグネット（永久磁石）と、中央部に穴を設けた円板状プレートを重ねて配し、さらに、ポールピースの外面とプレートの穴内面との間に形成されたリング状の隙間に、円筒状をしたボイスコイルが配された構成とするものである。この場合の第一のスピーカユニットは、ボイスコイルの上部に設けられた振動板駆動部を介して、電気信号の印加によるボイスコイルの往復動としての運動エネルギーを湾曲振動板へ伝達し、湾曲振動板の面方向に対して平行な振動を加えて音声を発生させるものとなっている。 On the other hand, the moving coil type actuator is provided with a cylindrical pole piece at the center of the disk-shaped yoke, and a ring-shaped magnet (permanent magnet) on the yoke so that the pole piece is at the center. A disc-shaped plate with a hole in the center is placed on top of it, and a cylindrical voice coil is placed in a ring-shaped gap formed between the outer surface of the pole piece and the inner surface of the hole in the plate. It is set as a configuration. In this case, the first speaker unit transmits the kinetic energy as the reciprocating motion of the voice coil by the application of the electric signal to the curved diaphragm through the diaphragm driving unit provided on the upper part of the voice coil, and the curved vibration. A sound is generated by applying a vibration parallel to the surface direction of the plate.
　ゆえに、この場合のハイブリッド型の万能スピーカ８０は、たとえば、第一のスピーカユニット１１０と、第二のスピーカユニット１２０と、第一のスピーカユニット１１０及び第二のスピーカユニット１２０を収容する中空構造の筐体１１と、を少なくとも備える。また、この筐体１１は、一面に開口部を有し、第一のスピーカユニット１１０が、平板状をした振動板１、及び入力された電気信号に応じて振動板１を振動させるムービングマグネット方式もしくはムービングコイル方式のアクチュエータ８２を少なくとも備えものとなっている。 Therefore, the hybrid type universal speaker 80 in this case has, for example, a first speaker unit 110, a second speaker unit 120, and a hollow structure that houses the first speaker unit 110 and the second speaker unit 120. And at least a housing 11. Moreover, this housing | casing 11 has an opening part on the one surface, and the 1st speaker unit 110 is the moving magnet system which vibrates the diaphragm 1 according to the flat plate-shaped diaphragm 1 and the input electrical signal. Alternatively, at least a moving coil actuator 82 is provided.
　そして、アクチュエータ８２が、平板状をした振動板１の面方向と同じ方向に駆動するように振動板１の端縁部と当接し、かつ、筐体１１に固定して取り付けられる。さらに、平板状をした振動板１は、アクチュエータ８２が取り付けられた一端側から対向する他端側へ向かうにしたがって湾曲する曲面部を形成し、筐体１１の開口部を被覆するように配されていると共に、両側縁部が筐体１１に支持され、第二のスピーカユニット１２０は、筐体１１の開口部を除く一面に固定して取り付けられるものとなっている。 The actuator 82 abuts against the edge of the diaphragm 1 and is fixedly attached to the housing 11 so as to be driven in the same direction as the surface direction of the flat diaphragm 1. Further, the plate-like diaphragm 1 is arranged so as to form a curved surface portion that curves from one end side to which the actuator 82 is attached to the opposite other end side, and covers the opening of the housing 11. In addition, both side edges are supported by the casing 11, and the second speaker unit 120 is fixedly attached to one surface excluding the opening of the casing 11.
　また、圧電体を利用したアクチュエータは、加えられた電圧を力に変換する圧電効果を利用した平板状の圧電素子であって、電圧をかけることで一方向に伸縮（振動）する。この圧電素子は、セラミックスや、ＰＶＤＦ（ポリフッ化ビニリデン）等の高分子、セラミックスと高分子との複合体などからなるものとすることができる。また、この場合の第一のスピーカユニットは、湾曲振動板の一方の端縁部に対して圧電素子を貼り付けた構造を有し、圧電素子の変化による運動エネルギーを効率良く湾曲振動板へ伝達し、湾曲振動板の面方向に対して平行な振動を加えて、音声を発生させるものである。 Also, an actuator using a piezoelectric body is a plate-like piezoelectric element using a piezoelectric effect that converts an applied voltage into force, and expands and contracts (vibrates) in one direction when a voltage is applied. This piezoelectric element can be made of ceramics, a polymer such as PVDF (polyvinylidene fluoride), a composite of ceramics and polymer, or the like. The first speaker unit in this case has a structure in which a piezoelectric element is attached to one edge of the curved diaphragm, and kinetic energy due to the change of the piezoelectric element is efficiently transmitted to the curved diaphragm. Then, a sound is generated by applying a vibration parallel to the surface direction of the curved diaphragm.
　ゆえに、この場合のハイブリッド型の万能スピーカ９０は、たとえば、第一のスピーカユニット１１０と、第二のスピーカユニット１２０と、第一のスピーカユニット１１０及び第二のスピーカユニット１２０を収容する中空構造の筐体１１と、を少なくとも備える。また、筐体１１は、一面に開口部を有し、第一のスピーカユニット１１０が、平板状をした振動板１、及び入力された電気信号に応じて振動板１を振動させる圧電体を利用したアクチュエータ９２を少なくとも備えるものとなっている。 Therefore, the hybrid type universal speaker 90 in this case has, for example, a first speaker unit 110, a second speaker unit 120, and a hollow structure that accommodates the first speaker unit 110 and the second speaker unit 120. And at least a housing 11. The casing 11 has an opening on one surface, and the first speaker unit 110 uses a flat plate-like diaphragm 1 and a piezoelectric body that vibrates the diaphragm 1 in accordance with an input electric signal. The actuator 92 is provided at least.
　そして、アクチュエータ９２が、平板状をした振動板１の面方向と同じ方向に駆動するように振動板１の一方の端部側表面に貼り付けられる。さらに、平板状をした振動板１は、アクチュエータ９２が取り付けられた一端側から対向する他端側へ向かうにしたがって湾曲する曲面部を形成し、筐体１１の開口部を被覆するように配されていると共に、両側縁部が前記筐体１１に支持され、第二のスピーカユニット１２０は、筐体１１の開口部を除く一面に固定して取り付けられるものとなっている。 Then, the actuator 92 is affixed to the surface on one end side of the diaphragm 1 so as to be driven in the same direction as the surface direction of the flat diaphragm 1. Further, the plate-like diaphragm 1 is arranged so as to form a curved surface portion that curves from one end side to which the actuator 92 is attached toward the other opposite end side, and covers the opening of the housing 11. In addition, both side edges are supported by the casing 11, and the second speaker unit 120 is fixedly attached to one surface excluding the opening of the casing 11.
　なお、ムービングマグネット方式もしくはムービングコイル方式のアクチュエータ８２を備えたハイブリッド型の万能スピーカ８０、及び圧電体を利用したアクチュエータ９２を備えたハイブリッド型の万能スピーカ９０においても、第二のスピーカユニット１２０の取付位置は特に限定されず、湾曲振動板１が配されている前面開口部を除く何れの位置であっても良い。 The second speaker unit 120 is also attached to the hybrid universal speaker 80 having the moving magnet type or moving coil type actuator 82 and the hybrid universal speaker 90 having the actuator 92 using a piezoelectric material. The position is not particularly limited, and may be any position except the front opening where the curved diaphragm 1 is disposed.
　図３３及び図３４において、第二のスピーカユニット１２０は、筐体１１の底板部１２に取り付けられたものとして示されている。また、筺体１１の内部は、第一のスピーカユニット１１０と第二のスピーカユニット１２０における音響的キャビティをそれぞれ形成するように隔壁によって区画されている。 33 and 34, the second speaker unit 120 is shown as being attached to the bottom plate portion 12 of the housing 11. Further, the interior of the housing 11 is partitioned by partition walls so as to form acoustic cavities in the first speaker unit 110 and the second speaker unit 120, respectively.
　さらに、第一のスピーカユニットとしては、ＰＶＤＦフィルムを湾曲振動板として用いて構成したものとし、僅かなバックキャビティを形成するように筐体表面に装着するものとしても良い。湾曲振動板として用いるＰＶＤＦフィルムは、その表面及び裏面に導電ポリマーを用いた導電材を被覆したものであって、導電材に給電するための電極を外側部に設けたものとなっている。また、ＰＶＤＦフィルム端部には音声信号入力用のリード線が配線され、電極と電気的に接続したものとなっている。
　この電極は、たとえば、導電性ペースト或いは銀ペースト等と称されている導電性接着剤を用い、シルク印刷法にて約５ｍｍ幅に設けたものとすることができる。 Furthermore, the first speaker unit may be configured using a PVDF film as a curved diaphragm, and may be mounted on the housing surface so as to form a slight back cavity. The PVDF film used as the curved diaphragm has a surface and a back surface coated with a conductive material using a conductive polymer, and has an electrode for supplying power to the conductive material on the outer side. Moreover, the lead wire for audio | voice signal input is wired in the PVDF film edge part, and is electrically connected with the electrode.
This electrode can be provided with a width of about 5 mm by a silk printing method using, for example, a conductive adhesive called a conductive paste or a silver paste.
　ゆえに、この場合のハイブリッド型の万能スピーカは、たとえば、第一のスピーカユニットと、第二のスピーカユニットと、前記第一のスピーカユニット及び前記第二のスピーカユニットを収容（装着）する中空構造の筐体と、を少なくとも備える。また、第一のスピーカユニットは、ＰＶＤＦフィルムからなる振動板であって、湾曲する曲面部を形成するようにバックキャビティを設けて筐体の表面に配されていると共に、周縁部が筐体に支持されたものとなっている。一方、第二のスピーカユニットは、ＰＶＤＦフィルム（振動板）が取り付けられている筐体の部位を除く一面に固定して取り付けられるものとなっている。 Therefore, the hybrid type universal speaker in this case has, for example, a first speaker unit, a second speaker unit, and a hollow structure that houses (attaches) the first speaker unit and the second speaker unit. A housing. The first speaker unit is a diaphragm made of a PVDF film, and is provided on the surface of the housing with a back cavity so as to form a curved surface portion that is curved, and a peripheral portion is provided on the housing. It has been supported. On the other hand, the second speaker unit is fixedly attached to one surface excluding the part of the housing to which the PVDF film (diaphragm) is attached.
　このように、湾曲したフィルム振動板を駆動させるスピーカユニット（すなわち、第一のスピーカユニット）と、一般的な音響機器に組み込まれている動電型や圧電型のスピーカユニット（すなわち、第二のスピーカユニット）とを組み合わせたハイブリッド型の万能スピーカとしても、難聴者と健聴者とが共に満足して聞くことのできるスピーカを提供することができる。 As described above, the speaker unit (that is, the first speaker unit) that drives the curved film diaphragm, and the electrodynamic or piezoelectric speaker unit (that is, the second speaker unit) that is incorporated in general acoustic equipment. As a hybrid type universal speaker combined with a speaker unit), it is possible to provide a speaker that both hearing-impaired and normal-hearing people can hear with satisfaction.
　また、本発明においてボイスコイルは、振動伝達板が平板矩形状をしたものではなく、振動伝達板における振動板接続部側の幅と、コイルリード線端末部側の幅との大きさが異なる平板非矩形状をしたものとしても良い。 Further, in the present invention, the voice coil is not a plate in which the vibration transmission plate has a rectangular plate shape, but is a flat plate in which the width of the vibration transmission plate on the vibration plate connecting portion side and the width on the coil lead wire terminal portion side are different. It may be a non-rectangular shape.
　これは、ボイスコイルにおける振動伝達板の振動板接続部側の幅とコイルリード線端末部側の幅が等しい大きさである平板矩形状をした振動伝達板の周囲にコイルを巻回した場合、コイルの幅が、振動板接続部側の幅やコイルリード線端末部側の幅よりも大きいものとなってしまう。そうすると、振動伝達板の側縁部からコイルがはみ出したものとなってしまい、ボイスコイルの取り扱いに注意を要する。また、コイルが、振動伝達板における振動板接続部側もしくはコイルリード線端末部側より抜け落ちてしまうおそれある。 This is when the coil is wound around a vibration transmission plate having a rectangular plate shape in which the width on the vibration plate connecting portion side of the vibration transmission plate in the voice coil and the width on the coil lead wire terminal portion side are equal. The width of the coil becomes larger than the width on the diaphragm connecting portion side and the width on the coil lead wire terminal portion side. Then, the coil protrudes from the side edge portion of the vibration transmission plate, and care must be taken in handling the voice coil. In addition, the coil may fall off from the diaphragm connecting portion side or the coil lead wire terminal portion side of the vibration transmitting plate.
　そこで、本発明では、図３５に示すように、反発型磁気回路４における空間４３内に配されることとなる側（すなわち、振動板接続部３１ａ側）の幅Ｗ１が、反発型磁気回路４における空間４３より露呈する側（すなわち、コイルリード線端末部３１ｂ側）の幅Ｗ２より小さい振動伝達板３１であって、振動板接続部３１ａ側に巻回されたコイル３２の巻き幅Ｗ３が、コイルリード線端末部３１ｂ側の幅Ｗ２と等しいかもしくは小さい大きさとなるボイスコイル１０３とした。 Therefore, in the present invention, as shown in FIG. 35, the width W1 on the side (that is, the diaphragm connecting portion 31a side) to be disposed in the space 43 in the repulsive magnetic circuit 4 is set to be the repulsive magnetic circuit 4. Is a vibration transmission plate 31 smaller than the width W2 on the side exposed from the space 43 (that is, the coil lead wire terminal portion 31b side), and the winding width W3 of the coil 32 wound on the diaphragm connection portion 31a side is The voice coil 103 has a size equal to or smaller than the width W2 on the coil lead wire terminal portion 31b side.
　すなわち、ボイスコイル１０３は、振動伝達板３１における振動板接続部３１ａ側の幅Ｗ１を、コイルリード線端末部３１ｂ側の幅Ｗ２の大きさよりも小さく形成するものとし（Ｗ１＜Ｗ２）、かつ、コイル３２の幅Ｗ３が、コイルリード線端末部３１ｂ側の幅Ｗ２の大きさと等しいかもしくは小さく（Ｗ３≦Ｗ２）なるものとする。そして、振動伝達板３１の周囲に巻回したコイル３２が、振動伝達板３１の側縁部からはみ出さないようにした。
　したがって、振動伝達板３１における振動板接続部３１ａ側の幅Ｗ１とコイルリード線端末部３１ｂ側の幅Ｗ２とコイル３２の幅Ｗ３との関係は、Ｗ１＜Ｗ３≦Ｗ２となる。 That is, the voice coil 103 is formed such that the width W1 on the diaphragm connecting portion 31a side of the vibration transmitting plate 31 is smaller than the width W2 on the coil lead terminal portion 31b side (W1 <W2), and It is assumed that the width W3 of the coil 32 is equal to or smaller than the width W2 on the coil lead wire terminal portion 31b side (W3 ≦ W2). The coil 32 wound around the vibration transmission plate 31 is prevented from protruding from the side edge of the vibration transmission plate 31.
Therefore, the relationship between the width W1 on the vibration plate connecting portion 31a side, the width W2 on the coil lead wire terminal portion 31b side, and the width W3 of the coil 32 in the vibration transmitting plate 31 is W1 <W3 ≦ W2.
　これにより、振動伝達板３１の側縁部からコイル３２がはみ出してしまうことが解消され、ボイスコイル１０３の梱包時や搬送時、反発磁気回路４内への設置時など、振動伝達板３１の側縁部におけるコイル３２部分が衝撃等を受けて損傷してしまうおそれを軽減することができる。また、コイル３２が、振動伝達板３１におけるコイルリード線端末部３１ｂ側より抜け落ちてしまうおそれも解消することができる。 Thus, the coil 32 is prevented from protruding from the side edge of the vibration transmission plate 31, and the side of the vibration transmission plate 31 such as when the voice coil 103 is packed or transported or installed in the repulsive magnetic circuit 4 is eliminated. It is possible to reduce the possibility that the coil 32 portion at the edge portion is damaged due to impact or the like. Moreover, the possibility that the coil 32 may fall off from the coil lead wire terminal portion 31b side of the vibration transmission plate 31 can be eliminated.
　なお、図３５においては、振動伝達板３１は、側縁部において僅かな段差を設けて幅狭となるものとしているが、本発明のボイスコイルにおいてはこれに限らず、図示しないが、振動伝達板の側縁部がコイルリード線端末部側から振動板接続部側へ向かうにしたがって徐々に幅狭となる略テーパー状としても良い。 In FIG. 35, the vibration transmission plate 31 is narrowed by providing a slight step at the side edge portion. However, in the voice coil of the present invention, the vibration transmission plate 31 is not limited to this, but is not illustrated. It is good also as a substantially taper shape which becomes narrow gradually as the side edge part of a board goes to the diaphragm connection part side from the coil lead wire terminal part side.
　さらに、本発明においてボイスコイルは、振動伝達板における振動板接続部側の幅と、コイルリード線端末部側の幅との大きさが同じとなる形状とした場合、振動伝達板の側縁部からコイルがはみ出したものとならないように、振動伝達板におけるコイル巻回部分の幅が小さくなるものとしても良い。 Furthermore, in the present invention, when the voice coil has a shape in which the width of the vibration transmission plate on the vibration plate connecting portion side and the width on the coil lead wire terminal portion side are the same, the side edge portion of the vibration transmission plate The width of the coil winding portion of the vibration transmission plate may be reduced so that the coil does not protrude from the coil.
　本発明では、図３６に示すように、反発型磁気回路４における空間４３内に配されることとなる側（すなわち、振動板接続部３１ａ側）の幅Ｗ４と、反発型磁気回路４における空間４３より露呈する側（すなわち、コイルリード線端末部３１ｂ側）の幅Ｗ５の大きさが同じであり、コイル巻回相当部分の一方もしくは両方の側縁部に切欠き部１１５を設けることでコイル巻回相当部分の幅Ｗ６を小さくした振動伝達板３１であって、コイル巻回相当部分に巻回されたコイル３２の巻き幅Ｗ７が、振動板接続部３１ａ側の幅Ｗ４及びコイルリード線端末部３１ｂ側の幅Ｗ５と等しいかもしくは小さい大きさとなるボイスコイル１１３とした。 In the present invention, as shown in FIG. 36, the width W4 on the side (that is, the diaphragm connecting portion 31a side) to be disposed in the space 43 in the repulsive magnetic circuit 4, and the space in the repulsive magnetic circuit 4 43, the width W5 on the exposed side (ie, the coil lead wire terminal portion 31b side) is the same, and the coil is formed by providing the notch 115 on one or both side edges of the coil winding equivalent portion. The vibration transmission plate 31 has a reduced width W6 corresponding to the winding portion, and the winding width W7 of the coil 32 wound around the coil winding equivalent portion includes the width W4 on the vibration plate connecting portion 31a side and the coil lead wire terminal. The voice coil 113 has a size equal to or smaller than the width W5 on the part 31b side.
　すなわち、ボイスコイル１１３は、振動伝達板３１における振動板接続部３１ａ側の幅Ｗ４とコイルリード線端末部３１ｂ側の幅Ｗ５が等しく（Ｗ４＝Ｗ５）、コイル巻回相当部分の幅Ｗ６が、振動板接続部３１ａ側の幅Ｗ４及びコイルリード線端末部３１ｂ側の幅Ｗ５の大きさよりも小さく形成するものとし（Ｗ６＜Ｗ４，Ｗ５）、かつ、コイル３２の幅Ｗ７が、振動板接続部３１ａ側の幅Ｗ４及びコイルリード線端末部３１ｂ側の幅Ｗ５の大きさと等しいかもしくは小さく（Ｗ７≦Ｗ４，Ｗ５）なるものとする。そして、振動伝達板３１の周囲に巻回したコイル３２が振動伝達板３１の側縁部からはみ出さないようにした。
　したがって、振動伝達板３１における振動板接続部３１ａ側の幅Ｗ４とコイルリード線端末部３１ｂ側の幅Ｗ５とコイル巻回相当部分の幅Ｗ６とコイル３２の幅Ｗ７との関係は、Ｗ６＜Ｗ７≦Ｗ４，Ｗ５となる。 That is, in the voice coil 113, the width W4 on the diaphragm connecting portion 31a side of the vibration transmitting plate 31 is equal to the width W5 on the coil lead wire terminal portion 31b side (W4 = W5), and the width W6 of the coil winding equivalent portion is The width W4 on the diaphragm connecting portion 31a side and the width W5 on the coil lead wire terminal portion 31b side are formed to be smaller (W6 <W4, W5), and the width W7 of the coil 32 is the diaphragm connecting portion. The width W4 on the 31a side and the width W5 on the coil lead wire terminal portion 31b side are equal to or smaller than (W7 ≦ W4, W5). The coil 32 wound around the vibration transmission plate 31 is prevented from protruding from the side edge of the vibration transmission plate 31.
Therefore, the relationship among the width W4 on the vibration plate connecting portion 31a side, the width W5 on the coil lead wire terminal portion 31b side, the width W6 of the coil winding equivalent portion, and the width W7 of the coil 32 in the vibration transmitting plate 31 is W6 <W7. ≦ W4, W5.
　ここで、ボイスコイル１１３の組み立てにおいて、振動伝達板３１における振動板接続部３１ａ側の幅Ｗ４は、コイル３２の幅Ｗ７の大きさと等しいかもしくは大きいものであるので、そのままでは振動伝達板３１へコイル３２を装着することができない。しかしながら、振動伝達板３１を撓ませることでその幅を小さくすれば、コイル３２の内部に振動伝達板３１（振動板接続部３１ａ側）を挿入することができ、容易にコイル３２を装着することができるものとなる。
　なお、振動伝達板３１における切欠き部１１５の深さは、コイル線材が引っ掛かれば特に限定されない。 Here, in assembling the voice coil 113, the width W4 of the vibration transmission plate 31 on the vibration plate connecting portion 31a side is equal to or larger than the width W7 of the coil 32. The coil 32 cannot be mounted. However, if the width of the vibration transmission plate 31 is reduced by bending the vibration transmission plate 31, the vibration transmission plate 31 (diaphragm connection portion 31a side) can be inserted into the coil 32, and the coil 32 can be easily attached. Will be able to.
The depth of the notch 115 in the vibration transmission plate 31 is not particularly limited as long as the coil wire is caught.
　これによっても、振動伝達板３１の側縁部からコイル３２がはみ出してしまうことが解消され、ボイスコイル１１３の梱包時や搬送時、反発磁気回路４内への設置時など、振動伝達板３１の側縁部におけるコイル３２部分が衝撃等を受けて損傷してしまうおそれを軽減することができる。しかも、振動伝達板３１を撓ませることで装着したコイル３２は、振動伝達板３１の撓みを解消して元の状態に戻せば、振動伝達板３１より抜け落ちてしまうおそれのないものとすることができる。
符号の説明 This also eliminates the fact that the coil 32 protrudes from the side edge of the vibration transmission plate 31. When the voice coil 113 is packed or transported, or installed in the repulsive magnetic circuit 4, the vibration transmission plate 31 can be removed. The possibility that the coil 32 portion at the side edge portion may be damaged due to impact or the like can be reduced. In addition, the coil 32 attached by bending the vibration transmission plate 31 may be prevented from falling off from the vibration transmission plate 31 if the bending of the vibration transmission plate 31 is eliminated and returned to its original state. it can.
Explanation of symbols
　１　振動板、１ａ　一端、１ｂ　他端、１ｃ　側縁、２，８２，９２　アクチュエータ、３，１０３，１１３　ボイスコイル、４　反発磁気回路、６，７　支持部材（クッション材）、８　弾性部材（クッション材）、９　押えシート、１０，２０，３０，４０，５０，６０　万能スピーカ、７０，８０，９０　ハイブリッド型の万能スピーカ、１１　筺体、１２　底板、１３　背板、１４　側板、１４ａ　内面、１５　開口部、１６　切り欠き部、１７　アンプ基盤、１８　エッジ支持部材、１９　音声信号分割手段、２１　磁気回路取付けベース、２２　支持部材押さえ板、２３　（コイル外側）クリアランス、３１　振動伝達板、３１ａ　振動板接続部、３１ｂ　コイルリード線端末部、３２　コイル、３２ａ　巻き始め端部、３２ｂ　巻き終わり端部、３３　（コイル内側）クリアランス、３４　充填材（接着剤）、３５ａ，３５ｂ　コイルリード線、３６　接着剤、３７（３７ａ，３７ｂ）　音声信号入力線（錦糸線）、３８　半田付け部、４１Ａ，４１Ｂ　マグネット（硬磁性部材）、４２Ａ，４２Ｂ　ヨーク（軟磁性部材）、４３　空間、４５，４６　ビス、５１　貼り合わせシート、５２　圧電体、５７　音声信号入力線、５９　分配器、１１０　第一のスピーカユニット、１１５　切欠き部、１２０　第二のスピーカユニット、１３１　振動板伝達板一体化部品、１４１　縦辺部、１４２　横辺部、１４３　上辺部、１４４　上辺段差部、１４５　Ｒ部、１４６　下辺段差部、１４７　下辺部、１４８　ネジ孔、１７１　ガイド座グリ部、１７２　ガイド凹部、１７３　ガイド凸部、１７４　ガイド枠部、４２１Ａ，４２１Ｂ　マグネット装着部（窪み平坦部）、４２４Ａ，４２４Ｂ　平面部（合わせ面）４２５Ａ，４２５Ｂ，４２６Ａ，４２６Ｂ　ビス穴。
  DESCRIPTION OF SYMBOLS 1 Diaphragm, 1a one end, 1b other end, 1c side edge, 2,82,92 Actuator, 3,103,113 Voice coil, 4 Repulsive magnetic circuit, 6,7 Support member (cushion material), 8 Elastic member (cushion) Material), 9 presser sheet, 10, 20, 30, 40, 50, 600 universal speaker, 70, 80, 90 hybrid type universal speaker, 11 housing, 12 bottom plate, 13 back plate, 14 side plate, 14a inner surface, 15 opening Part, 16 notch part, 17 amplifier base, 18 edge support member, 19 audio signal dividing means, 21 magnetic circuit mounting base, 22 support member pressing plate, 23 (coil outer side) clearance, 31 vibration transmission plate, 31a diaphragm connection Part, 31b coil lead wire terminal part, 32 coil, 32a winding start end part, 32b winding end end part, 33 (coil inside) clip Lance, 34 Filler (adhesive), 35a, 35b Coil lead wire, 36 Adhesive, 37 (37a, 37b) Audio signal input line (kinshi wire), 38 Soldering part, 41A, 41B Magnet (hard magnetic member) , 42A, 42B Yoke (soft magnetic member), 43 space, 45, 46 screw, 51 bonding sheet, 52 piezoelectric body, 57 audio signal input line, 59 distributor, 110 first speaker unit, 115 notch, 120 Second speaker unit, 131 Diaphragm transmission plate integrated part, 141 Vertical side part, 142 Horizontal side part, 143 Upper side part, 144 Upper side step part, 145 R part, 146 Lower side step part, 147 Lower side part, 148 Screw Hole, 171 Guide counterbore, 172 Guide recess, 173 Guide protrusion, 174 Guide frame, 421A, 421B Magnet mounting part (recess flat Carrier part), 424A, 424B plane part (mating surface) 425A, 425B, 426A, 426B Screw holes.

Claims (15)

  1. 　平板状をした振動板を駆動するアクチュエータ用のボイスコイルであって、
    　平板状をした振動伝達板と、
    　前記振動伝達板の一面側と他面側とにコイル線材が交互に巻回され、扁平長円筒状に形成されたコイルと、
    を備え、
    　前記コイルは、長手方向が前記振動伝達板の表面とクリアランスをもって配されていることを特徴とするボイスコイル。      A voice coil for an actuator that drives a plate-shaped diaphragm,
    A flat plate-shaped vibration transmission plate;
    A coil wire is alternately wound on one surface side and the other surface side of the vibration transmission plate, and a coil formed into a flat and long cylindrical shape,
    With
    The voice coil according to claim 1, wherein a longitudinal direction of the coil is arranged with a clearance from a surface of the vibration transmission plate.
  2. 　平板状をした振動板を駆動するアクチュエータ用の磁気回路であって、
    　請求項１から請求項３までの何れか１項に記載のボイスコイルを配することが可能な空間を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して前記空間内に反発磁界を形成するように配された一対の硬磁性部材と、
    　前記一対の硬磁性部材を挟持するように他極面側にそれぞれ配され、互いに接合されて前記一対の硬磁性部材を支持する一対の軟磁性部材と、
    を備え、
    　前記一対の軟磁性部材は、前記一対の硬磁性部材によって形成された前記空間において一軸方向に開口領域が形成されるように配されていることを特徴とする反発型磁気回路。     A magnetic circuit for an actuator that drives a flat diaphragm,
    4. The space is formed so as to be spaced apart from each other so as to form a space in which the voice coil according to any one of claims 1 to 3 can be disposed, and one pole side having the same polarity faces each other. A pair of hard magnetic members arranged to form a repulsive magnetic field therein,
    A pair of soft magnetic members disposed on the other pole surface side so as to sandwich the pair of hard magnetic members, and bonded to each other to support the pair of hard magnetic members;
    With
    The repulsive magnetic circuit, wherein the pair of soft magnetic members are arranged such that an opening region is formed in a uniaxial direction in the space formed by the pair of hard magnetic members.
  3. 　平板状をした振動板を駆動する音響機器用のアクチュエータであって、
    　平板状をした振動伝達板、及び該振動伝達板の一面側と他面側とにコイル線材が交互に巻回され、扁平長円筒状に形成されたコイルを備え、該コイルは、長手方向が前記振動伝達板の表面とクリアランスをもって配されているボイスコイルと、
    　前記ボイスコイルを配することが可能な空間を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して前記空間内に反発磁界を形成するように配された一対の硬磁性部材、及び該一対の硬磁性部材を挟持するように他極側にそれぞれ配され、互いに接合されて前記一対の硬磁性部材を支持する一対の軟磁性部材を備え、前記一対の軟磁性部材は、前記一対の硬磁性部材によって形成された前記空間において一軸方向に開口領域が形成されるように配されている反発型磁気回路と、
    から構成され、
    　前記ボイスコイルは、コイルが前記反発型磁気回路における一対の硬磁性部材とクリアランスをもって前記硬磁性部材が形成する空間内に配されていることを特徴とするアクチュエータ。     An actuator for an acoustic device that drives a flat diaphragm,
    A vibration transmission plate having a flat plate shape, and a coil formed by alternately winding a coil wire around one surface side and the other surface side of the vibration transmission plate, the coil having a longitudinal direction, A voice coil arranged with a clearance from the surface of the vibration transmission plate;
    A pair of hard wires that are spaced apart so as to form a space in which the voice coil can be placed and are arranged so that one pole sides having the same polarity face each other to form a repulsive magnetic field in the space. A pair of soft magnetic members disposed on the other pole side so as to sandwich the magnetic member and the pair of hard magnetic members, and joined to each other to support the pair of hard magnetic members; Is a repulsive magnetic circuit arranged so that an opening region is formed in a uniaxial direction in the space formed by the pair of hard magnetic members;
    Consisting of
    The actuator is characterized in that the voice coil is disposed in a space formed by the hard magnetic member with a clearance from a pair of hard magnetic members in the repulsive magnetic circuit.
  4. 　前記ボイスコイルにおけるコイルと振動伝達板の表面とのクリアランスは、前記ボイスコイルにおけるコイルと前記反発型磁気回路における硬磁性部材とのクリアランスより大であることを特徴とする請求項３に記載のアクチュエータ。 The actuator according to claim 3, wherein a clearance between the coil of the voice coil and the surface of the vibration transmission plate is larger than a clearance between the coil of the voice coil and a hard magnetic member of the repulsive magnetic circuit. .
  5. 　前記ボイスコイルにおけるコイルの巻き幅は、前記反発型磁気回路における硬磁性部材の幅より小であることを特徴とする請求項３又は請求項４に記載のアクチュエータ。 The actuator according to claim 3 or 4, wherein a winding width of the coil in the voice coil is smaller than a width of a hard magnetic member in the repulsive magnetic circuit.
  6. 　前記ボイスコイルは、振動伝達板が、前記反発型磁気回路における空間より一軸方向にはみ出る大きさを有し、
    　前記振動伝達板のはみ出た領域の一部を対向する二方向より弾性的に挟持する支持部材をさらに備えることを特徴とする請求項３から請求項５までの何れか１項に記載のアクチュエータ。     The voice coil has a size in which the vibration transmitting plate protrudes in one axial direction from the space in the repulsive magnetic circuit,
    The actuator according to any one of claims 3 to 5, further comprising a support member that elastically holds a part of the protruding region of the vibration transmission plate in two opposite directions.
  7. 　平板状をした振動板と、入力された電気信号に応じて前記振動板を振動させるアクチュエータと、を少なくとも備え、
    　前記アクチュエータは、
    　平板状をした振動伝達板、及び該振動伝達板の一面側と他面側とにコイル線材が交互に巻回され、扁平長円筒状に形成されたコイルを備え、該コイルは、長手方向が前記振動伝達板の表面とスペースをもって配されているボイスコイルと、
    　前記ボイスコイルを配することが可能な空間を形成するように離間し、かつ、同じ極性を有する一極側同士が対向して前記空間内に反発磁界を形成するように配された一対の硬磁性部材、及び該一対の硬磁性部材を挟持するように他極側にそれぞれ配され、互いに接合されて前記一対の硬磁性部材を支持する一対の軟磁性部材を備え、前記一対の軟磁性部材は、前記一対の硬磁性部材によって形成された前記空間において一軸方向に開口領域が形成されるように配されている反発型磁気回路と、
    から構成され、
    　前記ボイスコイルは、コイルが前記反発型磁気回路における一対の硬磁性部材とクリアランスをもって前記硬磁性部材が形成する空間内に配されていると共に、前記振動板の面方向と同じ方向に駆動するように振動伝達板の一縁部が前記振動板の端縁部と連続するように接合され、
    　前記振動板は、前記アクチュエータの振動伝達板と接合された一端側から対向する他端側へ向かうにしたがって湾曲する曲面部を形成するように配されていることを特徴とする万能スピーカ。     A flat plate-shaped diaphragm, and an actuator that vibrates the diaphragm in response to an input electric signal,
    The actuator is
    A vibration transmission plate having a flat plate shape, and a coil formed by alternately winding a coil wire around one surface side and the other surface side of the vibration transmission plate, the coil having a longitudinal direction, A voice coil arranged with a space and a surface of the vibration transmission plate;
    A pair of hard wires that are spaced apart so as to form a space in which the voice coil can be placed and are arranged so that one pole sides having the same polarity face each other to form a repulsive magnetic field in the space. A pair of soft magnetic members disposed on the other pole side so as to sandwich the magnetic member and the pair of hard magnetic members, and joined to each other to support the pair of hard magnetic members; Is a repulsive magnetic circuit arranged so that an opening region is formed in a uniaxial direction in the space formed by the pair of hard magnetic members;
    Consisting of
    The voice coil is disposed in a space formed by the hard magnetic member with a clearance from a pair of hard magnetic members in the repulsive magnetic circuit, and is driven in the same direction as the surface direction of the diaphragm. The vibration transmission plate is joined so that one edge of the vibration transmission plate is continuous with the edge of the vibration plate,
    The universal speaker, wherein the diaphragm is disposed so as to form a curved surface portion that curves from one end side joined to the vibration transmission plate of the actuator toward the other end side facing the diaphragm.
  8. 　前記振動板の駆動方向に沿う両側縁部を支持する筐体をさらに備えることを特徴とする請求項７に記載の万能スピーカ。 The universal speaker according to claim 7, further comprising a housing that supports both side edges along the driving direction of the diaphragm.
  9. 　前記振動板の両側縁部は、対向する二方向より挟持する弾性部材を介して前記筐体に支持されていることを特徴とする請求項８に記載の万能スピーカ。 The universal speaker according to claim 8, wherein both side edges of the diaphragm are supported by the casing via elastic members sandwiched from two opposite directions.
  10. 　前記振動板の一端側に前記アクチュエータが複数取り付けられていることを特徴とする請求項７から請求項９までの何れか１項に記載の万能スピーカ。 The universal speaker according to any one of claims 7 to 9, wherein a plurality of the actuators are attached to one end side of the diaphragm.
  11. 　前記振動板の他端側にもさらに前記アクチュエータが取り付けられていることを特徴とする請求項７から請求項１０までの何れか１項に記載の万能スピーカ。 The universal speaker according to any one of claims 7 to 10, wherein the actuator is further attached to the other end of the diaphragm.
  12. 　前記振動板は、前記曲面部に圧電体を利用したアクチュエータをさらに備えていることを特徴とする請求項７から請求項１１までの何れか１項に記載の万能スピーカ。 The universal speaker according to any one of claims 7 to 11, wherein the diaphragm further includes an actuator using a piezoelectric body in the curved surface portion.
  13. 　前記電気信号を幾つかの周波数帯域に分割する手段をさらに備え、分割した各電気信号を互いに異なるアクチュエータにそれぞれ入力することを特徴とする請求項１１又は請求項１２に記載の万能スピーカ。 The universal speaker according to claim 11 or 12, further comprising means for dividing the electric signal into several frequency bands, wherein the divided electric signals are respectively input to different actuators.
  14. 　前記振動板は、曲面部の曲げ角度が９０°から１３０°までであることを特徴とする請求項７から請求項１４までの何れか１項に記載の万能スピーカ。 The universal speaker according to any one of claims 7 to 14, wherein the vibration plate has a curved portion with a bending angle of 90 ° to 130 °.
  15. 　前記筐体は、第二のスピーカユニットをさらに備えていることを特徴とする請求項８から請求項１４までの何れか１項に記載の万能スピーカ。
          The universal speaker according to any one of claims 8 to 14, wherein the casing further includes a second speaker unit.
PCT/JP2016/051759 2015-01-25 2016-01-22 Voice coil, magnetic circuit, actuator, and universal speaker WO2016117665A1 (en)

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JP2015255546A JP2016140061A (en) 2015-01-25 2015-12-27 Voice coil, magnetic circuit and actuator
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CN114125602A (en) * 2021-11-04 2022-03-01 歌尔科技有限公司 Sound box

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JP2000308186A (en) * 1999-04-19 2000-11-02 Sony Corp Loudspeaker
JP2003032783A (en) * 2001-07-17 2003-01-31 Yamaha Corp Linear vibrator and speaker provided therewith
JP2007174234A (en) * 2005-12-21 2007-07-05 Pioneer Electronic Corp Diaphragm for speaker device, speaker device and portable telephone

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JP2000308186A (en) * 1999-04-19 2000-11-02 Sony Corp Loudspeaker
JP2003032783A (en) * 2001-07-17 2003-01-31 Yamaha Corp Linear vibrator and speaker provided therewith
JP2007174234A (en) * 2005-12-21 2007-07-05 Pioneer Electronic Corp Diaphragm for speaker device, speaker device and portable telephone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114125602A (en) * 2021-11-04 2022-03-01 歌尔科技有限公司 Sound box

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