WO2014162545A1 - Dispositif de haut-parleur - Google Patents

Dispositif de haut-parleur Download PDF

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Publication number
WO2014162545A1
WO2014162545A1 PCT/JP2013/060242 JP2013060242W WO2014162545A1 WO 2014162545 A1 WO2014162545 A1 WO 2014162545A1 JP 2013060242 W JP2013060242 W JP 2013060242W WO 2014162545 A1 WO2014162545 A1 WO 2014162545A1
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WO
WIPO (PCT)
Prior art keywords
vibration direction
diaphragm
voice coil
vibration
direction conversion
Prior art date
Application number
PCT/JP2013/060242
Other languages
English (en)
Japanese (ja)
Inventor
実 堀米
小林　博之
智 樋渡
理人 鶴谷
Original Assignee
パイオニア株式会社
東北パイオニア株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社, 東北パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2013/060242 priority Critical patent/WO2014162545A1/fr
Publication of WO2014162545A1 publication Critical patent/WO2014162545A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • 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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/08—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
    • 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
    • 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
    • H04R9/022—Cooling arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the present invention relates to a speaker device.
  • a dynamic speaker device As a general speaker device, a dynamic speaker device is known (see, for example, Patent Document 1). As shown in FIG. 1, for example, the dynamic speaker device is joined to a frame 3J, a cone-shaped diaphragm 21J, an edge 4J that supports the diaphragm 21J on the frame 3J, and an inner peripheral portion of the diaphragm 21J.
  • the voice coil bobbin 610J, the damper 7J that supports the voice coil bobbin 610J on the frame 3J, the voice coil 611J wound around the voice coil bobbin 610J, the yoke 51J, the magnet 52J, and the plate 53J, and the voice coil 611J are arranged. And a magnetic circuit in which a magnetic gap is formed.
  • the voice coil bobbin 610J vibrates due to the Lorentz force generated in the voice coil 611J in the magnetic gap, and the diaphragm 21J is driven by the vibration.
  • a voice coil 611J is arranged on the opposite side to the acoustic radiation side of the diaphragm 21J, and the vibration direction of the voice coil 611J and the voice coil bobbin 610J
  • the vibration direction of the diaphragm 21J is configured to be the same direction.
  • the region for vibrating the diaphragm 21J, the region for vibrating the voice coil bobbin 610J, the region where the magnetic circuit is disposed, and the like are in the vibration direction (acoustic radiation direction) of the diaphragm 21J. Therefore, the overall height of the speaker device must be relatively large.
  • the size of the diaphragm 21J of the speaker device along the vibration direction is the same as the size of the cone-shaped diaphragm 21J along the vibration direction and the diaphragm 21J is supported by the frame 3J.
  • the magnetic circuit mainly includes a magnet height (d) corresponding to a height from the upper surface of the yoke 51J to the yoke 51J, and the yoke 51J mainly includes a thickness (e) of the magnetic circuit.
  • the vibration direction of the voice coil bobbin 610J and the vibration direction of the diaphragm 21J are the same direction, if the amplitude of the diaphragm 21J is increased to obtain a large volume, In order to ensure the vibration stroke of the voice coil bobbin 610J, the overall height of the speaker device becomes large, and it is difficult to achieve a reduction in the thickness of the speaker device. That is, there is a problem that it is difficult to achieve both a reduction in the thickness and volume of the speaker device.
  • the present invention is an example of a problem to deal with such a problem. That is, it is an object of the present invention to provide a thin speaker device capable of emitting a large volume of reproduced sound, to change the direction of vibration of the voice coil and transmit it to the diaphragm.
  • the invention according to claim 1 that achieves such an object includes a first diaphragm and a second diaphragm that are arranged to face each other, a stationary portion that supports the diaphragm in a freely vibrating manner along a vibration direction, A driving unit that is provided in the stationary unit and applies vibration to the diaphragm, and the driving unit converts the direction of the vibration of the voice coil, the magnetic circuit, and the voice coil to the diaphragm.
  • a vibration direction conversion unit, the vibration direction conversion unit includes a first vibration direction conversion unit and a second vibration direction conversion unit, and the first vibration direction conversion unit includes the first diaphragm.
  • the second vibration direction converting portion includes: a diaphragm side coupling portion coupled directly or via another member; and a voice coil side coupling portion coupled directly or via another member. , Connected to the second diaphragm directly or through another member A diaphragm-side coupling portion; and a voice coil-side coupling portion that is coupled to the voice coil directly or via another member, wherein the voice coil-side coupling portion of the first vibration direction changing portion is the second It is arranged between the diaphragm and the voice coil side connecting part of the second vibration direction changing part, and the voice coil side connecting part of the second vibration direction changing part is connected to the first diaphragm and the first vibration part. It is a speaker apparatus characterized by arrange
  • An invention according to claim 16 that achieves the above object includes a first diaphragm and a second diaphragm that are arranged to face each other, and a stationary portion that supports each of the diaphragms in a freely vibrating manner along a vibration direction,
  • a driving unit that is provided in the stationary unit and that vibrates the diaphragm, and the driving unit includes a magnetic circuit having a magnetic gap, and a voice coil that is arranged to freely vibrate in the magnetic gap of the magnetic circuit;
  • a vibration direction conversion unit that changes the direction of vibration of the voice coil and transmits the vibration to the diaphragm, and the vibration direction conversion unit directly transmits the voice coil and the first diaphragm included in the magnetic circuit.
  • a plurality of links for connecting through other members, and a plurality of links for connecting the voice coil provided in the magnetic circuit and the second diaphragm directly or through other members are provided.
  • FIG. 2 is a plan perspective view
  • FIG. 3 is a side perspective view
  • FIG. 4 is a perspective view of FIG.
  • FIG. 5 is a cross-sectional view taken along the line X1-X1
  • FIG. 5 is a cross-sectional view taken along the line Y1-Y1 in FIG. 3, and FIG.
  • the speaker device 1 (speaker unit 1U) is provided on the diaphragm 20, the stationary part 10 that supports the diaphragm 20 so as to vibrate freely along the vibration direction, and vibrates the diaphragm 20 by an audio signal.
  • the drive unit 30 includes a magnetic circuit 40, a voice coil 31, and a vibration direction conversion unit 50 that changes the direction of vibration of the voice coil 31 and transmits the vibration to the diaphragm 20.
  • the vibration direction of the voice coil 31 is the X-axis direction
  • the two directions orthogonal to the direction are the Y-axis direction and the Z-axis direction, respectively.
  • the diaphragm 20 includes a first diaphragm 21 and a second diaphragm 22 that are disposed to face each other.
  • the diaphragm 20 is supported by the stationary part 10 via the edge 23.
  • the edge 23 (first edge 23A, second edge 23B) is arranged in an annular shape having a curved portion and a straight portion around the diaphragm 20, and a concave portion 23t is provided in the curved portion.
  • the first diaphragm 21 and the second diaphragm 22 include acoustic radiation surfaces 21a and 22a, respectively.
  • the acoustic radiation surfaces 21a and 22a are not only the first diaphragm 21 and the second diaphragm 22 (surfaces on the acoustic radiation side) as shown in the figure, but also the first diaphragm 21 and the second diaphragm 21.
  • the opposing inner surfaces of the diaphragm 22 can be used as the acoustic radiation surfaces 21a and 22a.
  • each outer peripheral part 21b, 22b is directly or via other members, such as an adhesive agent, to the 1st edge 23A and the 2nd edge 23B (indirectly) ) It is connected.
  • the diaphragm 20 (the first diaphragm 21 and the second diaphragm 22) may have a substantially rectangular planar shape, a circular shape, an elliptical shape, or other shapes.
  • the cross-sectional shape of the diaphragm 20 can be formed in a prescribed shape such as a flat plate shape, a dome shape, or a cone shape, for example.
  • the cross-sectional shape of the diaphragm 20 is a plane, but may be a curved shape. Moreover, if necessary, the overall height of the diaphragm 20 may be made relatively small, and the speaker device 1 may be thinned.
  • the first diaphragm 21 and the second diaphragm 22 are provided with a plurality of fitting hole portions 21c and 22c, respectively, and the fitting convex portions 55 of the vibration direction changing portion 50 are formed in the fitting hole portions 21c and 22c.
  • the first diaphragm 21 and the second diaphragm 22 are attached to the vibration direction converter 50 by fitting.
  • the stationary part 10 is a general term for parts that support vibrations such as the diaphragm 20 and the driving part 30.
  • the stationary part 10 is not intended to be completely stationary itself, and the whole stationary part 10 vibrates due to the influence of the vibration of the driving part 30 or other force. Also good.
  • the stationary part 10 includes a first component member 11 that supports the first diaphragm 21 via the first edge 23A, and a second member that supports the second diaphragm 22 via the second edge 23B.
  • a component 12 is provided.
  • the first component member 11 is a flat plate member that can function as a baffle plate for the first diaphragm 21.
  • the first component member 11 includes an opening mounting portion 11a for mounting the first edge 23A and the first diaphragm 21, and the speaker member 1U is not shown in the first component member 11.
  • a mounting hole 11b is provided for mounting to the like.
  • the stationary part 10 includes an annular part 10A surrounding the vibration direction changing part 50 and a columnar part 10B arranged inside the annular part 10A.
  • the annular portion 10A supports the voice coil 31 and the magnetic circuit 40.
  • the columnar portion 10B has one end supported by the annular portion 10A and the other end extending inside the annular portion 10A.
  • the vibration direction converter 50 is supported at the end.
  • the drive unit 30 includes a voice coil 31 or a voice coil support unit 32, which is a drive member, a magnetic circuit 40, and a vibration direction conversion unit 50.
  • the voice coil 31 is disposed in a magnetic gap 40G of the magnetic circuit 40.
  • the voice coil 31 vibrates in one axial direction along the magnetic gap 40G, and the vibration direction conversion unit 50 changes the direction of the vibration of the voice coil 31 and transmits it to the diaphragm 20.
  • the voice coil 31 vibrates along the X-axis direction, and the diaphragm 20 is arranged so as to vibrate in the Z-axis direction substantially orthogonal to the vibration direction of the voice coil 31.
  • the vibration direction converter 50 converts the vibration of the voice coil 31 in the X-axis direction into vibration of the diaphragm 20 in the Z-axis direction.
  • the voice coil 31 is supported by the rigid voice coil support part 32, but the voice coil 31 itself may be rigid and connected to the vibration direction conversion part 50.
  • the magnetic circuit 40 includes a first magnetic pole member 40A supported on the first component member 11 side in the stationary portion 10 and a second magnetic pole member 40B supported on the second component member 12 side in the stationary portion 10. ing.
  • a gap between the first magnetic pole member 40A and the second magnetic pole member 40B constitutes a magnetic gap 40G.
  • the first magnetic pole member 40 ⁇ / b> A and the second magnetic pole member 40 ⁇ / b> B are configured by a magnet 41, a yoke (magnetic body) 42, or a member that combines the magnet 41 and the yoke 42.
  • Magnetic gap between the first magnetic pole member 40A including the magnet 41 and the second magnetic pole member 40B including the yoke 42, or between the first magnetic pole member 40A including the yoke 42 and the second magnetic pole member 40B including the magnet 41. 40G can be configured.
  • the yoke 42 provided on one or both of the first magnetic pole member 40A and the second magnetic pole member 40B has a protruding portion 42t on the surface 42m on the first diaphragm side or the surface 42n on the second diaphragm side, respectively. Is provided.
  • the surface area of the yoke 42 on the first diaphragm side surface 42m or the second diaphragm side surface 42n can be increased, and the heat generated in the magnetic circuit 40 can be increased. Heat can be radiated efficiently.
  • the protrusion 42t can efficiently radiate the heat generated in the magnetic circuit 40 as a radiating fin. As a result, the functional degradation (demagnetization) due to heat of the magnetic circuit 40 can be suppressed.
  • the magnetic circuit 40 includes a magnet 41 (41A, 41B, 41C, 41D) and a yoke (magnetic body) 42 (42A) so that a plurality of magnetic gaps 40G are arranged along the vibration direction (for example, the X-axis direction) of the voice coil 31. , 42B).
  • the magnetic poles of the magnet 41 (41A, 41B, 41C, 41D) are set so that the directions of the magnetic flux passing through the pair of magnetic gaps 40G are opposite to each other ( ⁇ Z-axis direction).
  • a voice coil 31 in which a conductive member is wound so that currents in opposite directions ( ⁇ Y-axis directions) flow is arranged.
  • a driving force (Lorentz force, electromagnetic force) in a direction ( ⁇ X axis direction) along the magnetic gap 40G is generated in the voice coil 31.
  • the arrangement relationship between the magnet 41 and the yoke 42 is not limited to the illustrated example.
  • the voice coil 31 is formed in an annular shape by winding a conductive member to which an audio signal is input, and is itself supported by the stationary portion 10 so as to be able to vibrate or by the voice coil supporting portion 32 to the stationary portion 10. It is supported freely.
  • the voice coil 31 may have a flat plate shape or a cylindrical shape.
  • the voice coil support portion 32 can be formed of, for example, a plate-like or cylindrical member (insulating member or resin member), and the voice coil 31 is supported on or inside the surface.
  • the voice coil 31 is provided with rigidity (including bending rigidity and torsional rigidity) by being supported by the voice coil support portion 32.
  • the voice coil 31 itself can be configured in a flat plate shape or a cylindrical shape having rigidity.
  • the driving force (Lorentz force) that causes the voice coil 31 to vibrate along the X-axis direction is the magnitude of the current flowing through the voice coil 31 along the Y-axis direction, the magnetic flux density in the magnetic gap, and the conductivity linked to the magnetic flux. Because of the length of the member, the voice coil 31 has a length in a direction (Y axis direction) substantially perpendicular to the vibration direction of the voice coil 31 with respect to the length of the voice coil 31 in the vibration direction (X axis direction). A relatively large driving force can be obtained by relatively increasing.
  • the voice coil 31 is held on the stationary part 10 by the holding part 60.
  • the holding unit 60 holds the voice coil 31 or the voice coil support unit 32 with respect to the stationary unit 10 so as to freely vibrate along the vibration direction (for example, the X-axis direction) and restricts movement in other directions.
  • the holding unit 60 can be deformed along the vibration direction (for example, the X-axis direction) of the voice coil 31 and has rigidity in a direction intersecting the vibration direction.
  • the voice coil 31 has an annular flat plate shape, and is configured by winding a conductive member such as a conducting wire 31A in an annular shape.
  • the voice coil 31 has a planar shape defined by a major axis and a minor axis.
  • the shape is an ellipse having the major axis in the Y-axis direction and the minor axis in the X-axis direction.
  • the shape is rectangular or polygonal (eg, square, square, rectangular, regular hexagon, hexagon, etc.) Or the like.
  • the direction of the long axis of the voice coil 31 is a direction that intersects the vibration direction (X-axis direction) of the voice coil 31. Are arranged in a direction (for example, the Y-axis direction) intersecting with the vibration direction.
  • the voice coil 31 is composed of a plurality of conductive members 31A (31A-1, 31A-2) having an annular shape.
  • the plurality of conductive members 31A (31A-1, 31A-2) are arranged side by side on the same plane in the direction (Y axis direction) intersecting the vibration direction (X axis direction) of the voice coil 31. Yes.
  • two conductive members 31A-1 and 31A-2 are arranged side by side in the major axis direction.
  • the voice coil 31 is held on the stationary part 10 by the holding part 60.
  • the holding unit 60 regulates the vibration of the voice coil 31 in the uniaxial direction.
  • the holding unit 60 can be configured by a plate-like member having a thickness in a direction intersecting a plane in which the voice coil 31 vibrates, and the plate-like member can be bent or bent with respect to the vibration direction of the voice coil 31. By doing so, the vibration of the voice coil 31 is regulated in a uniaxial direction.
  • the holding unit 60 regulates the vibration of the voice coil 31 in a uniaxial direction, but the vibration direction of the voice coil 31 may vibrate in other directions besides the uniaxial direction.
  • the voice coil 31 may vibrate in the Z-axis direction (the other direction) while the holding unit 60 restricts the vibration of the voice coil 31 in the X-axis direction (one-axis direction). That is, the holding unit 60 restricting the vibration of the voice coil 31 in the uniaxial direction includes that the voice coil 31 vibrates in another direction different from the uniaxial direction.
  • the holding unit 60 has a function of storing the vibration of the voice coil 31 in a plane in which the voice coil 31 extends, and deforms the vibration in the plane of the voice coil 31 to allow the vibration of the voice coil 31. In addition, it has rigidity with respect to vibration in a direction intersecting the plane of the voice coil 31 and suppresses vibration.
  • the holding unit 60 includes two forms of a vibration direction changing unit side holding unit 61 and a stationary unit side holding unit 62.
  • the vibration direction converter 50 includes a diaphragm-side connecting portion 50a that is directly connected to the diaphragm 20 via another member, and a voice coil-side connecting portion 50b that is connected to the voice coil 31 directly or via another member.
  • the rigid link portion 50c that is obliquely provided between the diaphragm side connecting portion 50a and the voice coil side connecting portion 50b so as to freely change the angle, and the end of the link portion 50c and the diaphragm side connecting portion 50a or the voice coil side.
  • a joint portion 50d that connects the connecting portion 50b so as to freely change the angle is provided.
  • the rigidity of the link part 50c of the vibration direction conversion unit 50 is greater than at least the rigidity of the voice coil 31 of the holding unit 60 in the vibration direction.
  • the holding unit 60 allows vibration of the voice coil 31 by being deformed in a specific direction, but the link portion 50c of the vibration direction converting unit 50 is rigid so that vibration of the voice coil 31 is applied to the diaphragm 20. Tell.
  • the vibration direction converter 50 includes a first vibration direction converter 50A that vibrates the first diaphragm 21 and a second vibration direction converter 50B that vibrates the second diaphragm 22.
  • the first diaphragm 21 connected to the first vibration direction converter 50A is disposed above the second diaphragm 22 connected to the second vibration direction converter 50B.
  • Each of the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B includes a diaphragm side connection part 50a, a voice coil side connection part 50b, a link part 50c, and a joint part 50d.
  • the joint portion 50d is provided between the link portion 50c and the diaphragm side connecting portion 50a, or between the link portion 50c and the voice coil side connecting portion 50b, or between the link portions 50c and 50c.
  • the voice coil side connection portion 50 b of the vibration direction conversion section 50 is connected to the voice coil 31 or the voice coil support section 32 via a connection member 54.
  • the diaphragm-side coupling portion 50a of the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B is provided with the fitting convex portion 55 described above, and the first vibration plate 21 is provided on the fitting convex portion 55. And the fitting holes 21c and 22c of the second diaphragm 22 are fitted.
  • the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B are each provided with a support unit 50C, and the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B are supported.
  • the part 50C is supported by the columnar part 10B of the stationary part 10.
  • Such a speaker device 1 inputs a voice signal as an electric signal to the voice coil 31 of the drive unit 30, so that the voice coil 31 or the voice coil along the magnetic gap 40 ⁇ / b> G of the magnetic circuit 40.
  • the support part 32 vibrates. This vibration is changed in direction by the vibration direction converter 50 and transmitted to the diaphragm 20, and the diaphragm 20 is vibrated in, for example, the Z-axis direction shown in the figure to emit a sound corresponding to the sound signal in the acoustic radiation direction.
  • the vibration direction conversion unit 50 changes the vibration direction of the voice coil 31 and the vibration direction of the diaphragm 20 to different directions. Accordingly, it is possible to make the back side of the diaphragm 20 thinner as compared with the case where the voice coil 31 is vibrated along the vibration direction of the diaphragm 20. With such a configuration, it is possible to obtain a thin speaker device that can reproduce a low sound range with a high sound pressure.
  • the speaker device 1 since the vibration of the voice coil 31 is changed in direction by the vibration direction converter 50 and transmitted to the diaphragm 10, the speaker device 1 can be increased even if the amplitude of the diaphragm 20 is increased by increasing the amplitude of the voice coil 31.
  • the thickness of the (speaker unit 1U) in the acoustic radiation direction (the overall height of the speaker unit) can be made relatively small. As a result, a thin speaker device 1 (speaker unit 1U) capable of emitting a large volume of reproduced sound can be obtained.
  • the opposing inner surfaces of the first diaphragm 21 and the second diaphragm 22 can be set as acoustic radiation surfaces 21a1 and 22a1, respectively.
  • the first diaphragm 21 includes an acoustic radiation surface 21a1 on the second diaphragm 22 side
  • the second diaphragm 22 includes an acoustic radiation surface 22a1 on the first diaphragm 21 side.
  • Such a speaker device 1 (speaker unit 1U) includes an internal space 1U1 disposed between the first diaphragm 21 and the second diaphragm 22, and the stationary unit 10 includes the first diaphragm.
  • the stationary part 10 includes a side part 10D disposed opposite to the outer peripheral parts 21b and 22b of the first diaphragm 21 and the second diaphragm 22, and the opening part 10C described above can be provided in the side part 10D. .
  • the internal space 1U1 of the speaker unit 1U includes a vibration direction of the voice coil 31 (example: X-axis direction), a vibration direction of the first diaphragm 21 (example: Z-axis direction), the voice coil 31 and the first diaphragm. It is defined in a defined direction (eg, Y-axis direction) that intersects the 21 vibration directions.
  • the prescribed direction is a direction in which a space between the diaphragm side connecting portion 50a of the first vibration direction converting portion 50A and the diaphragm side connecting portion 50a of the second vibration direction converting portion 50B extends.
  • the internal space 1U1 of the unit 1U is open in this prescribed direction. Further, the internal space 1U1 opens in a direction intersecting with the vibration direction of the first diaphragm 21 or the vibration direction of the second diaphragm 22, such as opening in the vibration direction of the voice coil 31, for example. There is no particular limitation.
  • [Vibration direction converter] 7 to 12 are explanatory diagrams for explaining the vibration direction conversion unit of the speaker device according to the embodiment of the present invention.
  • the vibration direction conversion unit 50 detects vibrations in which the pair of voice coils 31, 31 approaches or separates along the X axis direction, and the first diaphragm 21 and the second diaphragm 22 approach or move along the Z axis direction. Convert to separated vibration.
  • the first vibration direction converter 50A is connected to the first diaphragm 21 and extends along the X axis direction, and a pair of voice coils 31 disposed along the X axis direction. , 31 are connected to each of voice coil side connecting portions 50b, 50b, and a plurality of link portions 50c (a pair of links in the illustrated example) are provided between the diaphragm side connecting portion 50a and each of the voice coil side connecting portions 50b.
  • the diaphragm side connecting portion 50a and the voice coil side connecting portion 50b are arranged substantially in parallel.
  • the pair of link portions 50c are substantially symmetrical with respect to the Z-axis (axis along the vibration direction of the diaphragm 20).
  • the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B are disposed substantially symmetrically with respect to the X axis.
  • the second vibration direction converter 50B includes a diaphragm side connecting portion 50a connected to the second diaphragm 22, and a plurality of voice coil side connecting portions 50b (in the example shown, a pair of voice coil side connecting portions 50b, 50b). ), A plurality of link portions 50c (a pair of link portions 50c and 50c in the illustrated example), and a plurality of joint portions 50d.
  • the joint part 50d includes a part of the link part 50c (the illustrated example is the end of the link part 50c) and a part of the diaphragm side coupling part 50a (the illustrated example is the end of the vibration direction changing part 50a), or A part of the link part 50c and a part of the voice coil side connecting part 50b (in the illustrated example, the end part of the voice coil side connecting part 50b) or a plurality of link parts 50c are connected.
  • the plurality of link portions 50c are in the Y-axis direction (directions that intersect the vibration direction of the voice coil 31 and the vibration direction of the diaphragm 20 respectively). Are arranged in parallel at a set interval. And the some link part 50c of the 2nd vibration direction conversion part 50B is arrange
  • the connection member 54 includes the voice coil 31 or the voice coil support part 32, the voice coil side connection part 50b of the first vibration direction conversion part 50A, and the voice coil side connection part 50b of the second vibration direction conversion part 50B. It is connected.
  • the connecting member 54 has a voice coil side connecting portion 50b of the first vibration direction converting portion 50A and a voice coil side connecting portion 50b of the second vibration direction converting portion 50B in the vibration direction (Z-axis direction) of the diaphragm 20. Are arranged at different positions.
  • the connecting member 54 serves as a spacer that fills the gap between the voice coil side connecting portion 50b of the first vibration direction changing portion 50A and the voice coil side connecting portion 50b of the second vibration direction changing portion 50B arranged at different positions.
  • the voice coil side connection portion 50b of the first vibration direction conversion section 50A and the voice coil side connection portion 50b of the second vibration direction conversion section 50B are disposed.
  • the voice coil side connecting portion 50b of the first vibration direction conversion section 50A is disposed on the second diaphragm 22 side with respect to the voice coil 31 or the voice coil support section 32, and the voice coil of the second vibration direction conversion section 50B.
  • the side connection portion 50 b is disposed on the first diaphragm 21 side with respect to the voice coil 31 or the voice coil support portion 32.
  • the link portion 50c of the first vibration direction conversion section 50A and the link portion 50c of the second vibration direction conversion section 50B that are arranged in parallel in the Y-axis direction are in an intersecting state, and the first vibration direction
  • the voice coil side connection portion 50b of the conversion unit 50A is disposed between the second diaphragm 22 and the voice coil side connection portion 50b of the second vibration direction conversion unit 50B, and the second vibration direction conversion unit 50B.
  • the voice coil side connecting portion 50b is disposed between the first diaphragm 21 and the voice coil side connecting portion 50b of the first vibration direction changing portion 50A.
  • the vibration direction changing part 50 includes a support part 50 ⁇ / b> C supported by the columnar part 10 ⁇ / b> B of the stationary part 10.
  • the link portion 50c of the vibration direction converter 50 changes the inclination angle of the link portion 50c (eg, the angle formed by the link portion 50c and the X-axis direction) due to the vibration of the voice coil 31 and the reaction force received from the columnar portion 10B.
  • the support part 50C of the vibration direction conversion part 50 has a columnar part-side connection part 50f that is directly connected to the columnar part 10B of the stationary part 10 or connected (directly connected) via another member.
  • the vibration direction conversion part 50 is supported by the columnar part 10B of the stationary part 10 via the support part 50C.
  • the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B include a support unit 50C.
  • the columnar portion side connecting portion 50f of the support portion 50C of the first vibration direction converting portion 50A is provided adjacent to the diaphragm side connecting portion 50a of the second vibration direction converting portion 50B.
  • the columnar portion side connecting portion 50f of the support portion 50C of the second vibration direction converting portion 50B is provided adjacent to the diaphragm side connecting portion 50a of the first vibration direction converting portion 50A.
  • the columnar part 10B of the stationary part 10 is the columnar part side of the first vibration direction conversion part 50A. It arrange
  • a support unit 50C is provided in at least one vibration direction conversion unit 50, and the other vibration direction conversion units 50 are columnar. Arranged apart from the part 10B.
  • the first vibration direction conversion unit 50A or the second vibration direction conversion unit 50B includes a plurality of link portions 50c. Support portions 50C (support link portions 50e and columnar portion side connection portions 50f) are provided at two ends of the plurality of link portions 50c, and the other link portions 50c are arranged apart from the columnar portion 10B. ing.
  • the voice coil side connecting portion 50 b and the link portion 50 c extend along the vibration direction (X-axis direction) of the voice coil 31 and protrude toward the first diaphragm 21 or the second diaphragm 22. 53.
  • the protrusion 53 is formed continuously from one end of the link portion 50c to the other end.
  • the voice coil side connecting portion 50b and the link portion 50c have rigidity in the vibration direction of the voice coil 31.
  • the diaphragm-side connecting portion 50a is provided with necessary rigidity when the diaphragm-side connecting portion 50a itself is attached to the diaphragm 20.
  • the protrusion part 53 raises the rigidity of the link part 50c etc., and protrudes partially, the mass increase of the link part 50c etc. can be suppressed.
  • FIG. 11 is a perspective view showing the first link member 51 and the second link member 52 (FIG. 11A is a plan perspective view of the first link member 51, and FIG. 11B is the first view). (B) is a rear perspective view of the link member 51, and (c) is a plan perspective view of the second link member 52).
  • the first link member 51 includes a pair of voice coil side connection portions 51b, a plurality of link portions 51c arranged in parallel, a diaphragm side connection portion 51a divided for each pair of link portions 51c, and a joint portion 51d.
  • the first link member 51 is provided with a support link portion 51e and a columnar portion side connection portion 51f constituting the support portion 50C.
  • One end of the support link portion 51e (link portion) is integrally connected to an intermediate position of the link portion 51c via a joint portion 51d, and the other end is connected to the end of the columnar portion side connection portion 51f via the joint portion 51d. Connected together.
  • the second link member 52 includes a pair of voice coil side connection parts 52b, a plurality of link parts 52c arranged in parallel, a diaphragm side connection part 52a divided for each pair of link parts 52c, and a joint part 52d.
  • a pair of voice coil side connection parts 52b a plurality of link parts 52c arranged in parallel
  • a diaphragm side connection part 52a divided for each pair of link parts 52c
  • a joint part 52d are integrally configured as a sheet-like member.
  • the first vibration direction conversion unit 50A or the second vibration direction conversion unit 50B configured by the first link member 51 and the second link member 52 includes a plurality of link portions 51c and a plurality of link portions arranged in parallel. 52c.
  • the vibration direction conversion unit 50 substantially includes a plurality of combinations of the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B.
  • a plurality of combinations of the first vibration direction conversion unit 50 ⁇ / b> A and the second vibration direction conversion unit 50 ⁇ / b> B are arranged side by side in the major axis direction of the voice coil 31.
  • the first vibration direction conversion unit 50 ⁇ / b> A or the second vibration direction conversion unit 50 ⁇ / b> B is configured so that the link portion 52 c of the second link member 52 is disposed on the link portion 51 c of the first link member 51.
  • the link member 51 and the second link member 52 are integrated.
  • the length 51bL of the voice coil side coupling portion 51b of the first link member 51 is larger than the length 52bL of the voice coil side coupling portion 52b of the second link member 52, and the diaphragm of the first link member 51
  • the length 51aL of the side connecting portion 51a is smaller than the length 52aL of the diaphragm side connecting portion 52a of the second link member 52.
  • the link portion 51c of the first link member 51 and the link portion 52c of the second link member 52 are separated by a difference between the length 51bL and the length 52bL (difference between the length 52aL and the length 51aL). It arrange
  • a pair of link portions 51c and 52c arranged substantially in parallel is configured, and the parallel link portion 50D is configured by the substantially parallel link portions 51c and 51c.
  • the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B are provided with the parallel link unit 50D.
  • the parallel link part 50D can be provided in one or both of the first vibration direction conversion part 50A and the second vibration direction conversion part 50B.
  • the pair of link portions 50c and 50c constituting the parallel link portion 50D are inclined in the vibration direction of the first diaphragm 21 or the second diaphragm 22 and are arranged substantially parallel to each other.
  • the amplitude of the diaphragm 20 is defined by the length of the link portion 50c. Therefore, in order to increase the sound pressure by vibrating the diaphragm 20 relatively large, the length of the link portion 50c may be relatively long.
  • the first vibration direction converter 50A for vibrating the first diaphragm 21 and the second vibration direction converter 50B for vibrating the second diaphragm 22 are provided, the first vibration direction converter
  • the voice coil side connecting portion 50b of the portion 50A is disposed between the second diaphragm 22 and the voice coil side connecting portion 50b of the second vibration direction changing portion 50B, and the voice coil of the second vibration direction changing portion 50B is placed.
  • the length of the link portion 50c is relatively long by arranging the side connecting portion 50b between the first diaphragm 21 and the voice coil side connecting portion 50b of the first vibration direction changing portion 50A,
  • the distance between the first diaphragm 21 and the second diaphragm 22, that is, the thickness of the speaker device 1 (or the speaker unit 1U) can be made relatively small.
  • the amplitude of the diaphragm 20 (the first diaphragm 21 or the second diaphragm 22) can be made relatively large while the speaker device 1 is thinned.
  • the mechanical impedance includes an acoustic load generated by a cabinet or the like.
  • the mechanical impedances of the first diaphragm 50A and the second diaphragm 50B are the same. As described above, it is possible to adjust the mass of each diaphragm and the hardness of the vibration direction converter, joint, edge, and the like.
  • the height of the voice coil side connection portion 50b of the first vibration direction conversion portion 50A and the height of the voice coil side connection portion 50b of the second vibration direction conversion portion 50B in the vibration direction (Z-axis direction) of the diaphragm 20 This difference can be set to a desired size by using the connecting member 54. Specifically, by making this difference relatively large, the amplitude of the diaphragm 20 can be made relatively large while making the speaker device 1 thinner. Further, by providing this difference, a part of the thickness of the magnetic circuit 40 in the vibration direction of the diaphragm 20 can be overlapped in the difference, so that the speaker device 1 is thinned and used for the magnetic circuit 40.
  • the thickness of the magnet 41 can be made relatively large, and the electromagnetic force acting on the voice coil 31 can be made relatively large.
  • the vibration direction (Z-axis direction) of the diaphragm 20 the height of the connecting portion 50b on the voice coil 31 side of the first vibration direction converting portion 50A and the connecting portion 50b on the voice coil side of the second vibration direction converting portion 50B.
  • the driving force may be applied to a height position in the vicinity of the approximate center with respect to the height (that is, a substantially central portion in the height direction of the connecting member 54). This facilitates adjustment so that the mechanical impedance between the voice coil 31 and the first diaphragm 50A and the second diaphragm 50B is the same.
  • the support part 50C is supported by the columnar part 10B of the stationary part 10.
  • the support portion 50C of the vibration direction converting portion 50 receives the reaction force from the diaphragm 20 (the first diaphragm 21 or the second diaphragm 22), and the link portion efficiently. Therefore, the voice coil 31 can be prevented from vibrating in the vibration direction of the diaphragm 20 due to the reaction force from the diaphragm 20.
  • the vibration direction conversion part 50 includes the support part 50C, so that the vibration of the voice coil 31 in the X axis direction can be efficiently changed and the diaphragm 20 can be vibrated in the Z axis direction.
  • the vibration direction conversion unit 50 includes a plurality of combinations of the first vibration direction conversion unit 50A and the second vibration direction conversion unit 50B. Therefore, the vibration of the voice coil 31 is caused by the plurality of link portions 50c. Transmission to the first diaphragm 21 and the second diaphragm 22 can be efficiently performed.
  • the vibration direction conversion unit 50 includes an acoustic radiation surface 50E.
  • the link portion 50c that vibrates in the direction intersecting the vibration direction of the voice coil 31 and the diaphragm side connecting portion 50a can be the acoustic radiation surface 50E.
  • the diaphragm-side connecting portion 50 a vibrates integrally with the diaphragm 20, and can be made a part of the diaphragm 20.
  • the vibration direction conversion unit 50 includes the acoustic radiation surface 50E, the acoustic characteristics of the speaker device 1 can be improved.
  • FIG. 13A shows a first vibration direction conversion unit 500A and a second vibration direction conversion unit 500B in a vibration direction conversion unit 500 of another form. Also, in FIG. 13B, the first vibration direction conversion unit 500A is outside so that the structure of the second vibration direction conversion unit 500B out of the two vibration direction conversion units having a common structure can be easily seen. The state is shown.
  • FIG. 14 shows the structure of the first vibration direction converter 500A as a view of the first vibration direction converter 500A viewed from the internal space 1U1 side.
  • Both the first vibration direction conversion unit 500A and the second vibration direction conversion unit 500B have the first link member 510 and the second link member 520 as shown in FIGS. It is comprised by superimposing.
  • the first link member 510 shown in FIGS. 13 and 14 is, like the first link member 51 shown in FIG. 11, between the pair of voice coil side connecting portions 510b, the first or second diaphragms 21 and 22. And a link 510a for connecting the voice coil 31 to each other.
  • the link 510 a is formed by connecting a pair of link portions 511 and a diaphragm side connecting portion 512 by a joint portion 513.
  • five such links are arranged between the pair of voice coil side connecting portions 51b
  • the first link member of FIG. 13 and FIG. In 510 two links 510a are arranged between the pair of voice coil side connecting portions 510b.
  • the second link member 520 is also provided with two links 520a for connecting the first or second diaphragms 21 and 22 and the voice coil 31 between the pair of voice coil side connecting portions 520b.
  • This link 520 a is also formed by connecting a pair of link portions 521 and a diaphragm side connecting portion 522 by a joint portion 523.
  • the first vibration direction conversion unit 500 ⁇ / b> A is a two-piece arrangement in which a pair of the first link member 510 and the second link member 520 that are overlapped is arranged in a direction perpendicular to the vibration direction of the voice coil 31. .
  • the second vibration direction conversion unit 500 ⁇ / b> B also includes two sets of such a set arranged in a direction orthogonal to the vibration direction of the voice coil 31.
  • the holding portion 60 has a structure in which a link portion and a joint portion are combined in a rhombus shape.
  • the holding unit 60 can be deformed in the vibration direction of the voice coil 31 (for example, the X-axis direction), and is difficult to deform in a direction intersecting the X direction.
  • the voice coil support part 32 is supported by the stationary part 10 via the damper 65.
  • the damper 65 elastically supports the vibration (X-axis direction) of the voice coil support portion 32.
  • the voice coil support portion 32 is held at a predetermined position.
  • a well-known speaker damper such as a disk shape can be adopted in addition to the bellows shape as shown in the figure.
  • the vibration direction conversion unit 500 includes a first vibration direction conversion unit 500A and a second vibration direction conversion unit 500B arranged as follows.
  • the first vibration direction converter 500A includes a set of links 510a and 520a of the first and second link members 510 and 520 (hereinafter referred to as the first link). 500A-1) for the above two pieces, that is, four.
  • the second vibration direction conversion section 500B also has four sets of links 510a and 520a of the first and second link members 510 and 520 (hereinafter referred to as second links 500B-1). .
  • at least one first link 500A-1 is arranged between the second links 500B-1.
  • two first links 500A-1 are arranged between the second links 500B-1 at the center of the link arrangement direction.
  • one first link 500A-1 is arranged between the second links 500B-1.
  • the first and second vibrations of the voice coil 31 in the X-axis direction are converted in the Z-axis direction by the plurality of links arranged as described above. Are transmitted to the diaphragms 21 and 22.
  • the two columnar portions 10B extend from the outer peripheral side of the stationary portion 10 to the inside, and the central portions of these columnar portions are not connected, the first link 500A-1 and the first link 500A-1
  • the process of incorporating the second link 500B-1 into the speaker is easy.
  • the vibration direction converter 500 can be inserted between both the columnar portions 10B.
  • FIG. 15 is an explanatory diagram showing an application example of the speaker device according to the embodiment of the present invention. Since the electronic device 2 such as the flat panel display shown in FIG. 5A can reduce the thickness space necessary for installing the speaker device 1, the entire electronic device can be thinned. In addition, sufficient audio output can be obtained even in a thin electronic device.
  • the speaker device may be attached to the back side of the flat panel display.
  • FIG. 2B shows an automobile 3 provided with the speaker device according to the embodiment of the present invention.
  • the space in the vehicle can be expanded by making the speaker device 1 thinner.
  • the speaker device 1 according to the embodiment of the present invention is installed in the door panel, the protrusion of the door panel is eliminated and the operation space for the driver can be expanded.
  • sufficient sound output can be obtained, music and radio broadcasting can be enjoyed comfortably in the car even during high-speed driving with a lot of noise.
  • a hotel inn or training that can accommodate a large number of people, such as a house (building) intended for the residence of people, a meeting, a lecture, a party, etc.
  • the speaker device 1 When the speaker device 1 is installed in a facility or the like (building), the thickness space necessary for the installation of the speaker device 1 can be reduced, so that unnecessary space can be deleted and the space can be used effectively.
  • there are examples of providing rooms with audio / video equipment while living rooms without audio / video equipment are provided. In some cases, etc. are used as theater rooms.
  • the speaker device 1 Even in such a case, by using the speaker device 1, it is possible to easily convert a living room or the like into a theater room and to effectively use the space in the living room.
  • the speaker device 1 may be arranged at, for example, a ceiling or a wall in a living room.
  • 1 speaker device (1U: speaker unit), 10: stationary part, 20: diaphragm 21: First diaphragm, 22: Second diaphragm, 23: Edge, 30: Drive unit, 31: Voice coil 32: Voice coil support unit, 40: magnetic circuit, 40G: magnetic gap, 40A: first magnetic pole member, 40B: second magnetic pole member, 41 (41A, 41B, 41C, 41D): magnet, 42 (42A, 42B): yoke (magnetic body), 42m: surface, 50 (500): vibration direction converter, 50A (500A): 1st vibration direction conversion part, 50B (500B): 2nd vibration direction conversion part, 50a (51a, 52a, 512, 522): Diaphragm side connecting portion, 50b (51b, 52b, 510b, 520b): Voice coil side connecting portion, 50c (51a, 52c, 511, 521): link portion, 50d (51a, 52d, 513, 523): joint portion, 50e: support link portion

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention fournit un dispositif de haut-parleur de type mince permettant l'émission d'un son reproduit à un volume important. Le dispositif de haut-parleur (1) est équipé : d'une première ainsi que d'une seconde membrane (21, 22) disposées en opposition ; d'une partie immobile (10) ; et d'une partie entraînement (30). La partie entraînement (30) est équipée : d'une bobine acoustique (31) possédant une forme circulaire ; d'un circuit magnétique (40) ; et d'une partie conversion de direction de vibrations (50). La partie conversion de direction de vibrations (50) est équipée d'une première partie conversion de direction de vibrations (50A), et d'une seconde partie conversion de direction de vibrations (50B). La première et la seconde partie conversion de direction de vibrations (50A, 50B) sont équipées d'une portion connexion côté membrane (50a) et d'une portion connexion côté bobine acoustique (50b). La portion connexion côté bobine acoustique (50b) de la première partie conversion de direction de vibrations (50A), est disposée entre la seconde membrane (22) et la portion connexion côté bobine acoustique (50b) de la seconde partie conversion de direction de vibrations (50B). La portion connexion côté bobine acoustique (50b) de la seconde partie conversion de direction de vibrations (50B), est disposée entre la première membrane (21) et la portion connexion côté bobine acoustique (50b) de la première partie conversion de direction de vibrations (50A).
PCT/JP2013/060242 2013-04-03 2013-04-03 Dispositif de haut-parleur WO2014162545A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/060242 WO2014162545A1 (fr) 2013-04-03 2013-04-03 Dispositif de haut-parleur

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Application Number Priority Date Filing Date Title
PCT/JP2013/060242 WO2014162545A1 (fr) 2013-04-03 2013-04-03 Dispositif de haut-parleur

Publications (1)

Publication Number Publication Date
WO2014162545A1 true WO2014162545A1 (fr) 2014-10-09

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WO (1) WO2014162545A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011077560A1 (fr) * 2009-12-25 2011-06-30 パイオニア株式会社 Vibreur de haut-parleur et dispositif de haut-parleur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011077560A1 (fr) * 2009-12-25 2011-06-30 パイオニア株式会社 Vibreur de haut-parleur et dispositif de haut-parleur

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