WO2012111588A1 - Flat-type speaker unit - Google Patents

Flat-type speaker unit Download PDF

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Publication number
WO2012111588A1
WO2012111588A1 PCT/JP2012/053224 JP2012053224W WO2012111588A1 WO 2012111588 A1 WO2012111588 A1 WO 2012111588A1 JP 2012053224 W JP2012053224 W JP 2012053224W WO 2012111588 A1 WO2012111588 A1 WO 2012111588A1
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WO
WIPO (PCT)
Prior art keywords
frame
diaphragm
edge
outer peripheral
subframe
Prior art date
Application number
PCT/JP2012/053224
Other languages
French (fr)
Japanese (ja)
Inventor
金谷仁史
Original Assignee
株式会社ティーイーアイ
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 株式会社ティーイーアイ filed Critical 株式会社ティーイーアイ
Publication of WO2012111588A1 publication Critical patent/WO2012111588A1/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • 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

Definitions

  • the present invention relates to a planar speaker unit.
  • a planar speaker unit is one type of speaker.
  • the flat speaker system radiates sound from a flat radiation surface.
  • the flat speaker unit includes a diaphragm made of a flat plate, an edge, a frame, and a voice coil actuator.
  • the edge supports the diaphragm.
  • the voice coil type actuator an alternating voltage is applied to the voice coil located in the magnetic gap to vibrate the diaphragm out of plane. Sound is emitted from the surface of the diaphragm.
  • the width of the magnetic gap has a predetermined value in order to prevent the voice coil from coming into contact with the yoke, magnet, etc. that form the magnetic gap.
  • the electromagnetic efficiency is improved and a larger sound can be emitted.
  • the edge structure is devised. The edge is required to have a seemingly contradictory function of suppressing the tilt of the diaphragm without causing resistance to out-of-plane vibration of the diaphragm.
  • a structure has been proposed in which the front and back surfaces of the edge of the diaphragm are supported by a pair of edges whose center of the cross section is curved in an arc.
  • the outline of the diaphragm is formed by connecting a plurality of straight lines and a plurality of bending lines, in order to match the bending rigidity of the edges that support the straight lines with the bending rigidity of the edges that hold the bending lines.
  • the device has been devised such as providing a notch hole.
  • this device there is a possibility that air leaks from the notch hole and the back pressure of the diaphragm becomes unstable.
  • the present invention has been devised in view of the above-described problems, and an object thereof is to provide a specific stable flat speaker unit that emits sound with a large structure and a simple output.
  • the flat speaker unit according to the present invention has a diaphragm outer peripheral portion which is an outer peripheral portion forming an outline formed by alternately connecting a plurality of straight lines and a plurality of bent lines, and the surface is flat. And a frame opening which is an opening made of a frame inner peripheral portion which is an inner peripheral portion forming an outline in which a plurality of straight lines and a plurality of bent lines are alternately connected.
  • An annular elastic member having a frame, an edge outer peripheral portion that is an outer peripheral portion, and an edge inner peripheral portion that is an inner peripheral portion, and the edge outer peripheral portion is fixed to the frame inner peripheral portion, and the edge inner peripheral portion is An edge fixed to the outer peripheral portion of the diaphragm, and a voice coil actuator that is supported by the frame and drives the diaphragm so as to vibrate out of plane, and the bending line is one of a broken line or a curve or one of them Combined
  • the diaphragm fits into the opening of the frame so that the outer periphery of the diaphragm and the inner periphery of the frame do not contact each other, and the bending line of the outer periphery of the diaphragm and the bending of the inner periphery of the frame
  • the gap between the portions excluding the ends sandwiched between the pair of ends with the line is wider than the gap between the straight line of the diaphragm outer peripheral part and the straight line of the inner peripheral part of
  • the diaphragm can be a flat plate having a diaphragm outer peripheral portion that is an outer peripheral portion that forms an outline formed by alternately connecting a plurality of straight lines and a plurality of bent lines.
  • the frame is provided with a frame opening which is an opening made of an inner periphery of the frame, which is an inner periphery that forms an outline in which a plurality of straight lines and a plurality of bent lines are alternately connected.
  • An edge is an annular elastic member having an edge outer peripheral portion which is an outer peripheral portion and an edge inner peripheral portion which is an inner peripheral portion, and the edge outer peripheral portion is fixed to the frame inner peripheral portion, and the edge inner peripheral portion is Fixed to the outer periphery of the diaphragm.
  • a voice coil actuator is supported by the frame and drives the diaphragm to vibrate out of plane.
  • a bend line is one of a fold line or a curve or a combination thereof. The diaphragm is fitted into the frame opening so that the outer periphery of the diaphragm and the inner periphery of the frame do not contact each other.
  • a gap between the bent portion of the diaphragm outer peripheral portion and a bent line of the frame inner peripheral portion excluding the ends sandwiched between the pair of end portions is a straight line between the diaphragm outer peripheral portion and the frame inner peripheral portion. It is wider than the gap between the straight line. As a result, it is easy to approximate the bending rigidity of the edge between the straight line and the bent line, and the diaphragm vibrates uniformly out of the plane, thereby obtaining good acoustic characteristics.
  • the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension
  • the bending line of the diaphragm outer peripheral part and the frame It has a width dimension that changes so that the gap with the bending line of the inner peripheral portion increases as it moves from the pair of ends of the bending line to the intermediate portion.
  • the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension.
  • a planar speaker unit includes: a subframe in which the frame is provided with the frame opening; and a main frame that fixes the subframe and supports the voice coil actuator.
  • a subframe in which the frame is provided with the frame opening; and a main frame that fixes the subframe and supports the voice coil actuator.
  • the edge is fixed to the surface of the inner periphery of the frame and the edge is fixed to the surface of the outer periphery of the frame, and the outer edge of the edge is fixed to the surface of the outer periphery of the diaphragm
  • the sub-frame is fixed to the main frame.
  • the frame includes a subframe in which the frame opening is provided, and a main frame that fixes the subframe and supports the voice coil actuator.
  • the subframe is a plate member.
  • the edge is fixed to the surface of the inner periphery of the frame, and the edge is fixed to the surface of the outer periphery of the diaphragm, and the outer periphery of the edge is the back surface of the inner periphery of the frame.
  • a back side edge fixed to the back surface of the diaphragm outer peripheral part.
  • the subframe is fixed to the main frame so that the front side edge and the back side edge are not fixed to the main frame. As a result, the tilt of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member constituting the edge.
  • a planar speaker unit includes a voice coil bobbin in which the voice coil actuator is fixed to the diaphragm, a voice coil wound around the voice coil bobbin, and a magnetic material, and is fixed to the main frame.
  • the voice coil is applied with a force perpendicular to the surface of the diaphragm from a magnetic field flowing through the magnetic gap.
  • the voice coil actuator is made of a voice coil bobbin fixed to the diaphragm, a voice coil wound around the voice coil bobbin, and a magnetic material, and a yoke fixed to the main frame and fixed to the yoke. And a pole piece made of a magnetic material and fixed to the magnet, and an auxiliary magnet fixed to the pole piece.
  • the voice coil is located in a magnetic gap that is a gap formed between the yoke and the pole piece.
  • the voice coil is subjected to a force perpendicular to the surface of the diaphragm from a magnetic field flowing through a magnetic gap, As a result, the inclination of the diaphragm can be suppressed.
  • the planar speaker unit according to the present invention has the following effects due to its configuration.
  • a diaphragm fitted into the frame opening of the frame is supported by the edge, and a voice coil actuator supported by the frame drives the diaphragm, and the contour of the outer peripheral portion of the diaphragm has a plurality of straight lines and a plurality of bent lines.
  • the inner periphery of the frame opening is formed by alternately connecting a plurality of straight lines and a plurality of bending lines, and the bending line between the diaphragm outer periphery and the frame opening.
  • the gap between the outer periphery of the diaphragm and the opening of the frame is wider than the straight gap, it is easy to approximate the bending rigidity of the edge between the straight line and the bent line, and the diaphragm is uniformly out of plane. Vibrate to obtain good acoustic characteristics.
  • the gap between the straight line and the straight line is constant, and the gap between the bent line and the bent line changes so as to increase as it moves from the end connected to the straight line to the central part. It is easy to make the bending rigidity of the edge approximate, and the diaphragm vibrates uniformly out of the plane to obtain good acoustic characteristics.
  • a main frame that supports the voice coil actuator fixes the sub-frame having a frame opening, an edge is composed of a front edge and a back edge, and the front edge supports the surface of the diaphragm, Since the back side edge supports the back surface of the diaphragm, the inclination of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member constituting the edge.
  • the cover frame having an elastic modulus larger than the elastic modulus of the subframe covers the outer periphery and the side surface of the subframe, the rigidity of the entire speaker unit is increased and the rigidity of the structure supporting the diaphragm is reduced. Can be maintained.
  • the voice coil actuator is composed of the voice coil bobbin, the voice coil, the yoke, the magnet, a pole piece, and an auxiliary magnet, and the voice coil is subjected to a force perpendicular to the surface of the diaphragm from a magnetic field. Therefore, the tilt of the diaphragm can be suppressed. Therefore, it is possible to provide a specific stable planar speaker unit that emits sound with a large structure and a simple output.
  • FIG. 1 is a plan view of a flat speaker unit according to a first embodiment of the present invention.
  • 1 is a side view of a flat speaker unit according to a first embodiment of the present invention. It is a bottom view of the flat type speaker unit concerning a first embodiment of the present invention. It is a front view of the planar speaker unit concerning a first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the flat speaker unit according to the first embodiment of the present invention taken along line AA. It is a fragmentary sectional view of the planar speaker unit concerning a first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the flat speaker unit according to the first embodiment of the present invention taken along line BB. It is a BB line sectional view of a flat type speaker unit concerning a second embodiment of the present invention. It is a BB line sectional view of a plane type speaker unit concerning a third embodiment of the present invention.
  • FIG. 1 is a plan view of the planar speaker unit according to the first embodiment of the present invention.
  • FIG. 2 is a side view of the flat speaker unit according to the first embodiment of the present invention.
  • FIG. 3 is a bottom view of the flat speaker unit according to the first embodiment of the present invention.
  • FIG. 4 is a front view of the flat speaker unit according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view taken along line AA of the flat speaker unit according to the first embodiment of the present invention.
  • FIG. 6 is a partial cross-sectional view of the flat speaker unit according to the first embodiment of the present invention.
  • FIG. 7 is a sectional view taken along line BB of the flat speaker unit according to the first embodiment of the present invention.
  • the diaphragm 100 is a plate-like member having a planar acoustic radiation surface.
  • the diaphragm 100 is made of a flat plate having a diaphragm outer peripheral portion which is an outer peripheral portion forming an outline formed by alternately connecting a plurality of straight lines L and a plurality of bending lines Q.
  • the bending line Q is one of a broken line or a curved line or a combination thereof.
  • the diaphragm 100 includes a diaphragm front plate 101, a diaphragm main body 102, and a diaphragm back plate 103.
  • the diaphragm front plate 101 is a plate material that forms the surface of the diaphragm 100 and is bonded to the front side of the diaphragm main body 102.
  • the diaphragm main body 102 is a plate material having a predetermined thickness.
  • the diaphragm back plate 193 is a plate material that forms the back surface of the diaphragm 100, and is bonded to the back side of the diaphragm main body 102.
  • the material of the subframe is resin, and the material of the main frame is metal.
  • the subframe 210 may be a plate-like member.
  • the subframe 210 is provided with a surface for fixing the outer peripheral portion of the edge.
  • the subframe 210 is provided with a surface for fixing the outer periphery of the edge on the front surface and the back surface.
  • the subframe 210 may be provided with a surface for fixing the inner periphery of the edge by providing one step from the surface of the plate-like member.
  • the diaphragm fits into the frame opening so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
  • the gap between the bending edge of the diaphragm outer peripheral part and the bending line of the inner peripheral part of the frame excluding the ends sandwiched between the pair of end parts is the clearance between the straight line of the outer peripheral part of the diaphragm and the straight line of the inner peripheral part of the frame Wider.
  • the gap between the straight line at the outer peripheral part of the diaphragm and the straight line at the inner peripheral part of the frame has a constant width
  • the gap between the bent line at the outer peripheral part of the diaphragm and the bent line at the inner peripheral part of the frame is a pair of ends of the bent line. You may have the width dimension which changes so that it may become large as it moves to a middle part from a part.
  • the bend line is a curve with a certain radius of curvature
  • the bend line at the inner periphery of the frame is smoothly connected to the straight line at the inner periphery of the frame
  • the bend line at the outer periphery of the diaphragm is smoothly connected to the straight line at the outer periphery of the diaphragm
  • the center of curvature of the bending line on the outer peripheral part of the diaphragm may be located inside the center of curvature of the bending line on the inner peripheral part of the frame.
  • the curvature radius R2 of the bending line of the outer peripheral part of the diaphragm and the curvature radius R1 of the bending line of the inner peripheral part of the frame may substantially coincide.
  • the edge 300 is an annular elastic member having an edge outer peripheral portion which is an outer peripheral portion and an edge inner peripheral portion which is an inner peripheral portion, and the edge outer peripheral portion is fixed to the frame inner peripheral portion and the edge inner peripheral portion vibrates. Fixed to the outer periphery of the plate.
  • the edge 300 may be an elastic member having an edge outer peripheral portion 301, an edge curved portion 302, and an edge inner peripheral portion 303.
  • the edge outer peripheral portion 301 has a cross section formed with a predetermined thickness.
  • the edge bending portion 302 has a cross section that curves out of plane. For example, the edge bending portion 302 has a cross section that forms a predetermined thickness and curves to the front side.
  • the edge inner peripheral portion 303 has a cross section having a predetermined thickness.
  • the sub frame 210 may be fixed to the main frame 220 so that the edge 300 is not fixed to the main frame 220.
  • the sub frame 210 may be fixed to the main frame 220 so that the edge 300 does not contact the main frame 220.
  • the edge 300 may be composed of a front side edge 310 and a back side edge 320.
  • the front edge 310 may be an elastic member having an edge outer peripheral portion 301, an edge curved portion 302, and an edge inner peripheral portion 303.
  • the front edge 310 has an edge outer periphery fixed to the surface of the frame inner periphery, and an edge inner periphery fixed to the surface of the diaphragm outer periphery.
  • the back side edge 320 is an elastic member having an edge outer peripheral portion 301, an edge curved portion 302, and an edge inner peripheral portion 303.
  • the back edge 320 has an edge outer peripheral portion fixed to the back surface of the frame inner peripheral portion, and an edge inner peripheral portion fixed to the rear surface of the diaphragm outer peripheral portion.
  • the voice coil actuator 400 is supported by the frame 200 and drives the diaphragm 100 to vibrate out of plane.
  • the voice coil actuator 400 may be supported by the main frame 220 and drive the diaphragm 100 to vibrate out of plane.
  • Voice coil actuator 400 includes voice coil bobbin 410, voice coil 420, yoke 530, magnet 540, pole piece 550, and auxiliary magnet 560.
  • the voice coil bobbin 410 is fixed to the diaphragm.
  • the voice coil bobbin 410 is a member having a cylindrical shape, and one end is fixed to the diaphragm 100.
  • the voice coil bobbin 410 is a member having a cylindrical shape, and one end is fixed to the back surface of the diaphragm 100.
  • the voice coil 420 is an electric wire wound around the voice coil bobbin.
  • the yoke 430 is made of a magnetic material and is fixed to the main frame 220.
  • the yoke 430 is made of a magnetic material and has a cylindrical shape with a closed bottom.
  • the yoke 430 is made of a magnetic material and has a cylindrical shape with a closed bottom.
  • a magnet 440 is fixed to the yoke 430.
  • the magnet 440 has a columnar shape, and one end is fixed to the bottom surface of the yoke 430.
  • the magnet 440 has a cylindrical shape, and one end is fixed to the bottom surface of the yoke 430.
  • the pole piece 450 is made of a magnetic material and is fixed to the magnet.
  • the pole piece 450 is a plate-like member made of a magnetic material and is fixed to the other end of the magnet 440.
  • the pole piece 450 is a disk-shaped member made of a magnetic material and is fixed to the other end of the magnet 440.
  • the voice coil 420 is located in the magnetic space.
  • the auxiliary magnet 560 is fixed to the pole piece 450. When an alternating voltage is applied to the voice coil 420, the voice coil bobbin 410 is acted upon by an electromagnetic force in the vertical direction to drive the diaphragm 100 to vibrate out of plane.
  • the cover frame 500 is a frame that covers the front side of the frame 200.
  • the cover frame 500 covers the outer periphery of the subframe 210.
  • the cover frame 500 may cover the outer peripheral portion and the side surface of the subframe 210.
  • the cover frame 500 may cover the surface and side surfaces of the subframe 210 excluding the frame opening.
  • the elastic modulus of the subframe may be smaller than the elastic modulus of the cover frame.
  • the sub frame 210 is made of resin
  • the cover frame 500 is made of metal.
  • the sub frame 210 and the main frame 220 are made of resin
  • the cover frame 500 is made of metal.
  • the sub frame 210 is made of resin
  • the main frame 220 and the cover frame 500 are made of metal.
  • the cover frame 500, the sub frame 210, and the main frame 220 may be fixed so that the front side edge 310 and the back side edge 320 are not fixed to the main frame 220 and the cover frame 500.
  • the cover frame 500, the sub frame 210, and the main frame 220 may be fixed so that the front side edge 310 and the back side edge 320 do not contact the main frame 220 and the cover frame 500.
  • FIG. 7 illustrates the diaphragm outer periphery of the diaphragm 100 and the frame inner periphery of the frame opening O of the flat speaker unit according to the first embodiment of the present invention.
  • the edge 300 is drawn with a two-dot broken line.
  • the contour of the outer peripheral portion of the diaphragm 100 is formed by alternately connecting four straight lines L and four curves Q.
  • the outline of the inner periphery of the frame opening O is formed by alternately connecting four straight lines L and four curved lines Q.
  • the diaphragm 100 is fitted into the frame opening O so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
  • the four straight lines L of the contour of the diaphragm outer periphery of the diaphragm 100 face the four straight lines L of the contour of the inner periphery of the frame opening O, respectively.
  • Four curves Q of the contour of the diaphragm outer periphery of the diaphragm 100 face the four curves Q of the contour of the inner periphery of the frame opening O, respectively.
  • the four curves Q of the outline of the diaphragm outer periphery of the diaphragm 100 have a radius of curvature R2 bulging outward.
  • the four curves Q of the outline of the diaphragm inner periphery of the frame opening O have a radius of curvature R1 that bulges outward.
  • the center of curvature of the bend line at the outer periphery of the diaphragm 100 is located inside the center of curvature of the bend line at the inner periphery of the frame.
  • the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension
  • the gap between the bending line of the diaphragm outer peripheral part and the bending line of the frame inner peripheral part is one of the bending lines. It has a width that changes to increase as it moves from the end of the pair to the middle.
  • FIG. 8 is a sectional view taken along line BB of the flat speaker unit according to the second embodiment of the present invention.
  • the flat speaker unit is a speaker unit having a flat acoustic radiation surface.
  • the flat speaker unit includes a diaphragm 100, a frame 200, an edge 300, and a voice coil actuator 400.
  • the planar speaker unit may include the diaphragm 100, the frame 200, the edge 300, the voice coil actuator 400, and the cover frame 500. Since the structure excluding the gap formed by the outer peripheral portion of the diaphragm 100, the frame opening O, and the inner peripheral portion is the same as that of the planar speaker unit according to the first embodiment, the description thereof is omitted.
  • FIG. 8 illustrates the diaphragm outer peripheral portion of the diaphragm 100 and the frame inner peripheral portion of the frame opening O of the flat speaker unit according to the second embodiment of the present invention.
  • the edge 300 is drawn with a two-dot broken line for easy understanding.
  • the outline of the outer peripheral part of the diaphragm 100 of the diaphragm 100 is formed by alternately connecting four straight lines L and four broken lines Q.
  • the outline of the inner periphery of the frame opening O is formed by alternately connecting four straight lines L and four folding lines Q.
  • the diaphragm fits into the frame opening O so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
  • the four straight lines L of the contour of the diaphragm outer periphery of the diaphragm 100 face the four straight lines L of the contour of the inner periphery of the frame opening O, respectively.
  • the four fold lines Q of the contour of the diaphragm outer periphery of the diaphragm 100 face the four fold lines Q of the contour of the inner periphery of the frame opening O, respectively.
  • the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension
  • the gap between the bending line of the diaphragm outer peripheral part and the bending line of the frame inner peripheral part is one of the bending lines. It has a width that changes to increase as it moves from the end of the pair to the middle.
  • FIG. 9 is a sectional view taken along line BB of the flat speaker unit according to the third embodiment of the present invention.
  • the flat speaker unit is a speaker unit having a flat acoustic radiation surface.
  • the flat speaker unit includes a diaphragm 100, a frame 200, an edge 300, and a voice coil actuator 400.
  • the planar speaker unit may include the diaphragm 100, the frame 200, the edge 300, the voice coil actuator 400, and the cover frame 500. Since the structure excluding the gap formed by the diaphragm outer peripheral portion, the frame opening O and the frame inner peripheral portion of the diaphragm 100 is the same as that of the planar speaker unit according to the first embodiment, the description thereof is omitted.
  • FIG. 7 illustrates the outer periphery, the frame opening O, and the inner periphery of the diaphragm 100 of the flat speaker unit according to the first embodiment of the present invention.
  • the edge 300 is drawn with a two-dot broken line.
  • the contour of the outer peripheral portion of the diaphragm 100 is formed by alternately connecting four straight lines L and four curves Q.
  • the outline of the inner periphery of the frame opening O is formed by alternately connecting four straight lines L and four curved lines Q.
  • the diaphragm 100 is fitted into the frame opening O so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
  • the four straight lines L of the contour of the diaphragm outer periphery of the diaphragm 100 face the four straight lines L of the contour of the inner periphery of the frame opening O, respectively.
  • Four curves Q of the contour of the diaphragm outer periphery of the diaphragm 100 face the four curves Q of the contour of the inner periphery of the frame opening O, respectively.
  • the four curves Q of the contour of the diaphragm outer periphery of the diaphragm 100 have a radius of curvature R2 that bulges inward.
  • the use of the planar speaker unit according to the embodiment of the present invention has the following effects.
  • the diaphragm 100 fitted in the frame opening O provided in the frame 200 is supported by the edge 300, and the voice coil actuator 400 supported by the frame 200 drives the diaphragm, and the outline of the diaphragm outer peripheral portion of the diaphragm 100.
  • the gap between the N straight lines and the N straight lines is constant, and the gap between the bending line and the bending line changes so as to increase as it moves from the pair of end portions to the central portion.
  • the bending rigidity of the edge and the bending rigidity of the edge at the bending line can be easily approximated, and the diaphragm 100 can vibrate uniformly out of plane to obtain good acoustic characteristics.
  • the bend line is a curve having a constant radius of curvature, and the center of curvature of the bend line on the outer peripheral part of the diaphragm is positioned inside the center of curvature of the bend line on the inner peripheral part of the frame. The gap changes gradually so as to move from the end connected to the straight line to the center.
  • the main frame 220 supporting the voice coil actuator 400 fixes the sub frame 210 provided with the frame opening, and the elastic modulus of the sub frame 210 is smaller than the elastic modulus of the main frame 220.
  • the rigidity of the structure that supports the actuator 400 can be kept high, and the rigidity of the structure that supports the diaphragm 100 can be kept low.
  • the edge 300 is constituted by the front side edge 310 and the back side edge 320, the front side edge 310 supports the surface of the diaphragm 100, and the back side edge 320 supports the back surface of the diaphragm 100.
  • the inclination of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member to be configured.
  • the voice coil actuator 400 includes a voice coil bobbin 410, a voice coil 420, a yoke 430, a magnet 440, a pole piece 450, and an auxiliary magnet 460. Therefore, the inclination of the diaphragm 100 can be suppressed.
  • the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
  • the structure of the voice coil actuator has been described, the structure is not limited to this.
  • the shape of the diaphragm 100 has been described as having an outline in which four straight lines and four bent lines are alternately connected, the present invention is not limited to this.
  • the shape of the diaphragm 100 is three or five. It is good also as a thing with the outline which 3 or more or 5 or more bending lines were connected alternately.
  • Diaphragm 101 Diaphragm front plate 102
  • Diaphragm body 103
  • Diaphragm back plate 200
  • Frame 210
  • Subframe 220 Main frame 300
  • Edge 301 Edge outer periphery 302
  • Edge curved portion 303
  • Edge inner periphery 310
  • Front side edge 320
  • Back side edge 400
  • Voice coil actuator 410
  • Voice coil bobbin 420
  • Voice coil 430
  • Magnet Pole piece 460

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

Abstract

The present invention addresses the problem of providing an acoustically-emitting, flat-type speaker unit of a specified stability and having a simple structure and a large output. In contrast to conventional flat-type speaker units, the flat-type speaker unit comprises: a vibrating plate having an outer peripheral section that forms an outline from a plurality of straight lines and a plurality of bent lines that are joined alternately; a frame having an opening disposed therein formed by an inner peripheral section that forms an outline of the alternately joined plurality of straight lines and plurality of bent lines; an edge which is an annular elastic member having an outer peripheral section and an inner peripheral section and is fixed to the inner peripheral section of the frame and to the outer peripheral section of the vibrating plate; and a voice coil-type actuator. The vibrating plate is fitted into the opening of the frame such that the outer peripheral section of the vibrating plate and the inner peripheral section of the frame do not come in contact. The gap at a location between a pair of end sections from the bent lines in the outer peripheral section of the vibrating plate and the bent lines in the inner peripheral section of the frame is made so as to be larger than the gap between the straight lines in the outer peripheral section of the vibrating plate and the straight lines in the inner peripheral section of the frame.

Description

平面型スピーカユニットFlat speaker unit
　本発明は、平面型スピーカユニットに関する。 The present invention relates to a planar speaker unit.
　平面型スピーカユニットは、スピーカの１つのタイプである。
　平面型スピーカシステムは、音響を平面の放射面から放射する。
　例えば、平面型スピーカユニットは、平板でできた振動板とエッジとフレームとボイスコイル式アクチエータとで構成される。
　エッジが振動板を支持する。
　ボイスコイル式アクチエータは、磁気空隙に位置するボイスコイルに交番電圧を印加されて、振動板を面外振動させる。音響が振動板の面から放射される。 A planar speaker unit is one type of speaker.
The flat speaker system radiates sound from a flat radiation surface.
For example, the flat speaker unit includes a diaphragm made of a flat plate, an edge, a frame, and a voice coil actuator.
The edge supports the diaphragm.
In the voice coil type actuator, an alternating voltage is applied to the voice coil located in the magnetic gap to vibrate the diaphragm out of plane. Sound is emitted from the surface of the diaphragm.
　振動板は、面外振動する際に、僅かに傾くので、ボイスコイルが磁気空隙を作るヨーク、マグネット等に接触することを防ぐために、磁気空隙の幅が所定の値をもつ。
　磁気空隙の幅を狭くすると、電磁気的効率がよくなり、より大きな音響を放射できる。
　磁気空隙の幅を狭くするために、振動板の傾きを押さえたいという要請があり、エッジの構造を工夫する。
　エッジには、振動板の面外振動の抵抗にならずに、振動板の傾きを押さえるという一見相反した機能を要求される。
　例えば、断面の中央が円弧状に湾曲した１対のエッジで振動板の縁部の表面と裏面とを各々に支持する構造が提案されている。
　一般に、振動板の輪郭が複数の直線と複数の屈曲線とを繋げた形状をしているので、直線を支えるエッジの曲げ剛性と屈曲線をささえるエッジの曲げ剛性を一致させるために、屈曲線に切欠き穴を設ける等の工夫をしている。
　しかし、この工夫では、切欠き穴から空気が漏れて、振動板の背圧が不安定になる恐れがあった。 Since the diaphragm tilts slightly when it vibrates out of plane, the width of the magnetic gap has a predetermined value in order to prevent the voice coil from coming into contact with the yoke, magnet, etc. that form the magnetic gap.
When the width of the magnetic gap is narrowed, the electromagnetic efficiency is improved and a larger sound can be emitted.
In order to narrow the width of the magnetic gap, there is a request to suppress the tilt of the diaphragm, and the edge structure is devised.
The edge is required to have a seemingly contradictory function of suppressing the tilt of the diaphragm without causing resistance to out-of-plane vibration of the diaphragm.
For example, a structure has been proposed in which the front and back surfaces of the edge of the diaphragm are supported by a pair of edges whose center of the cross section is curved in an arc.
In general, since the outline of the diaphragm is formed by connecting a plurality of straight lines and a plurality of bending lines, in order to match the bending rigidity of the edges that support the straight lines with the bending rigidity of the edges that hold the bending lines, The device has been devised such as providing a notch hole.
However, with this device, there is a possibility that air leaks from the notch hole and the back pressure of the diaphragm becomes unstable.
　本発明は以上に述べた問題点に鑑み案出されたもので、簡単な構造で出力が大きく音響放射する特定の安定した平面型スピーカユニットを提供しようとする。 The present invention has been devised in view of the above-described problems, and an object thereof is to provide a specific stable flat speaker unit that emits sound with a large structure and a simple output.
　上記目的を達成するため、本発明に係る平面型スピーカユニットを、複数の直線と複数の屈曲線とが交互に繋がってできた輪郭を形成する外周部である振動板外周部を持ち表面が平面になった部材である振動板と、複数の直線と複数の屈曲線とが交互に繋がった輪郭を形成する内周部であるフレーム内周部でできた開口部であるフレーム開口部を設けられるフレームと、外周部であるエッジ外周部と内周部であるエッジ内周部とをもつ環状の弾性部材であって該エッジ外周部を前記フレーム内周部に固着され該エッジ内周部を前記振動板外周部に固着されるエッジと、前記フレームに支持され前記振動板を面外振動する様に駆動するボイスコイル式アクチエータと、を備え、屈曲線が折線または曲線のうちの一方またはそれらの組み合わされた線であり、前記振動板外周部と前記フレーム内周部とが接触しない様に前記振動板が前記フレーム開口部に嵌まり、前記振動板外周部の屈曲線と前記フレーム内周部の屈曲線との１対の端部に挟まれた端部を除く箇所の隙間が前記振動板外周部の直線と前記フレーム内周部の直線との隙間より広い、ものとした。 In order to achieve the above object, the flat speaker unit according to the present invention has a diaphragm outer peripheral portion which is an outer peripheral portion forming an outline formed by alternately connecting a plurality of straight lines and a plurality of bent lines, and the surface is flat. And a frame opening which is an opening made of a frame inner peripheral portion which is an inner peripheral portion forming an outline in which a plurality of straight lines and a plurality of bent lines are alternately connected. An annular elastic member having a frame, an edge outer peripheral portion that is an outer peripheral portion, and an edge inner peripheral portion that is an inner peripheral portion, and the edge outer peripheral portion is fixed to the frame inner peripheral portion, and the edge inner peripheral portion is An edge fixed to the outer peripheral portion of the diaphragm, and a voice coil actuator that is supported by the frame and drives the diaphragm so as to vibrate out of plane, and the bending line is one of a broken line or a curve or one of them Combined The diaphragm fits into the opening of the frame so that the outer periphery of the diaphragm and the inner periphery of the frame do not contact each other, and the bending line of the outer periphery of the diaphragm and the bending of the inner periphery of the frame The gap between the portions excluding the ends sandwiched between the pair of ends with the line is wider than the gap between the straight line of the diaphragm outer peripheral part and the straight line of the inner peripheral part of the frame.
　上記本発明の構成により、振動板が、複数の直線と複数の屈曲線とが交互に繋がってできた輪郭を形成する外周部である振動板外周部を持つ平板でできる。フレームが、複数の直線と複数の屈曲線とが交互に繋がった輪郭を形成する内周部であるフレーム内周部でできた開口部であるフレーム開口部を設けられる。エッジが、外周部であるエッジ外周部と内周部であるエッジ内周部とをもつ環状の弾性部材であって該エッジ外周部を前記フレーム内周部に固着され該エッジ内周部を前記振動板外周部に固着される。ボイスコイル式アクチエータが、前記フレームに支持され前記振動板を面外振動する様に駆動する。屈曲線が折線または曲線のうちの一方またはそれらの組み合わされた線である。前記振動板外周部と前記フレーム内周部とが接触しない様に前記振動板が前記フレーム開口部に嵌まる。前記振動板外周部の屈曲線と前記フレーム内周部の屈曲線との１対の端部に挟まれた端部を除く箇所の隙間が前記振動板外周部の直線と前記フレーム内周部の直線との隙間より広い。
　その結果、直線と屈曲線でのエッジの曲げ剛性を近似したものにしやすく、振動板が均一に面外振動して、良好な音響特性をえる。 With the above-described configuration of the present invention, the diaphragm can be a flat plate having a diaphragm outer peripheral portion that is an outer peripheral portion that forms an outline formed by alternately connecting a plurality of straight lines and a plurality of bent lines. The frame is provided with a frame opening which is an opening made of an inner periphery of the frame, which is an inner periphery that forms an outline in which a plurality of straight lines and a plurality of bent lines are alternately connected. An edge is an annular elastic member having an edge outer peripheral portion which is an outer peripheral portion and an edge inner peripheral portion which is an inner peripheral portion, and the edge outer peripheral portion is fixed to the frame inner peripheral portion, and the edge inner peripheral portion is Fixed to the outer periphery of the diaphragm. A voice coil actuator is supported by the frame and drives the diaphragm to vibrate out of plane. A bend line is one of a fold line or a curve or a combination thereof. The diaphragm is fitted into the frame opening so that the outer periphery of the diaphragm and the inner periphery of the frame do not contact each other. A gap between the bent portion of the diaphragm outer peripheral portion and a bent line of the frame inner peripheral portion excluding the ends sandwiched between the pair of end portions is a straight line between the diaphragm outer peripheral portion and the frame inner peripheral portion. It is wider than the gap between the straight line.
As a result, it is easy to approximate the bending rigidity of the edge between the straight line and the bent line, and the diaphragm vibrates uniformly out of the plane, thereby obtaining good acoustic characteristics.
　以下に、本発明の実施形態にかかる平面型スピーカユニットを説明する。本発明は、以下に記載した実施形態のいずれか、またはそれらの中の二つ以上が組み合わされた態様を含む。 Hereinafter, a planar speaker unit according to an embodiment of the present invention will be described. The present invention includes any of the embodiments described below, or a combination of two or more of them.
　本発明の実施形態に係る平面型スピーカユニットは、前記振動板外周部の直線と前記フレーム内周部の直線との隙間が一定の幅寸法をもち、前記振動板外周部の屈曲線と前記フレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもつ。
　上記実施形態の構成により、前記振動板外周部の直線と前記フレーム内周部の直線との隙間が一定の幅寸法をもつ。前記振動板外周部の屈曲線と前記フレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもつ。
　その結果、直線と屈曲線でのエッジの曲げ剛性を近似したものにしやすく、振動板が均一に面外振動して、良好な音響特性をえる。 In the planar speaker unit according to the embodiment of the present invention, the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension, and the bending line of the diaphragm outer peripheral part and the frame It has a width dimension that changes so that the gap with the bending line of the inner peripheral portion increases as it moves from the pair of ends of the bending line to the intermediate portion.
With the configuration of the above embodiment, the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension. It has a width dimension that changes so that the gap between the bending line of the outer peripheral part of the diaphragm and the bending line of the inner peripheral part of the frame increases from a pair of ends of the bending line to the intermediate part.
As a result, it is easy to approximate the bending rigidity of the edge between the straight line and the bent line, and the diaphragm vibrates uniformly out of the plane, thereby obtaining good acoustic characteristics.
　本発明の実施形態に係る平面型スピーカユニットは、屈曲線が一定の曲率半径をもつ曲線であり、前記フレーム内周部の屈曲線が前記フレーム内周部の直線に滑らかに繋がり、前記振動板外周部の屈曲線が前記振動板外周部の直線に滑らかに繋がり、前記振動板外周部の屈曲線の曲率中心が前記フレーム内周部の屈曲線の曲率中心より内側に位置する。
　上記実施形態の構成により、屈曲線が一定の曲率半径をもつ曲線である。前記フレーム内周部の屈曲線が前記フレーム内周部の直線に滑らかに繋がる。前記振動板外周部の屈曲線が前記振動板外周部の直線に滑らかに繋がる。前記振動板外周部の屈曲線の曲率中心が前記フレーム内周部の屈曲線の曲率中心より内側に位置する。
　その結果、屈曲線と屈曲線との隙間が直線に繋がる端部から中央部に移動するにしたがってなだらかに大きくなるように変化する。 In the planar speaker unit according to the embodiment of the present invention, the bending line is a curve having a constant radius of curvature, and the bending line of the inner peripheral portion of the frame is smoothly connected to the straight line of the inner peripheral portion of the frame. The bend line of the outer peripheral part is smoothly connected to the straight line of the outer peripheral part of the diaphragm, and the center of curvature of the bend line of the outer peripheral part of the diaphragm is located inside the center of curvature of the bend line of the inner peripheral part of the frame.
According to the configuration of the above-described embodiment, the bent line is a curve having a constant radius of curvature. The bent line of the inner periphery of the frame is smoothly connected to the straight line of the inner periphery of the frame. The bending line of the diaphragm outer peripheral part is smoothly connected to the straight line of the diaphragm outer peripheral part. The center of curvature of the bend line of the outer peripheral part of the diaphragm is located inside the center of curvature of the bend line of the inner peripheral part of the frame.
As a result, the gap between the bend lines changes so as to increase gradually as the gap moves from the end connected to the straight line to the center.
　本発明の実施形態に係る平面型スピーカユニットは、前記フレームが前記フレーム開口部を設けられるサブフレームと該サブフレームを固定し前記ボイスコイル式アクチエータを支持するメインフレームとを有し、前記サブフレームが板状部材であって、前記エッジが該エッジ外周部を前記フレーム内周部の表面に固着され該エッジ内周部を前記振動板外周部の表面に固着される表側エッジと該エッジ外周部を前記フレーム内周部の裏面に固着され該エッジ内周部を前記振動板外周部の裏面に固着される裏側エッジとを有し、前記表側エッジと前記裏側エッジとが前記メインフレームに固着しない様に前記サブフレームがメインフレームに固定される。
　上記実施形態の構成により、前記フレームが前記フレーム開口部を設けられるサブフレームと該サブフレームを固定し前記ボイスコイル式アクチエータを支持するメインフレームとを有する。前記サブフレームが板状部材である。前記エッジが該エッジ外周部を前記フレーム内周部の表面に固着され該エッジ内周部を前記振動板外周部の表面に固着される表側エッジと該エッジ外周部を前記フレーム内周部の裏面に固着され該エッジ内周部を前記振動板外周部の裏面に固着される裏側エッジとを有する。前記表側エッジと前記裏側エッジとが前記メインフレームに固着しない様に前記サブフレームがメインフレームに固定される。
　その結果、エッジを構成する弾性部材の引っ張り剛性により、振動板の傾きを効率良く抑制できる。 A planar speaker unit according to an embodiment of the present invention includes: a subframe in which the frame is provided with the frame opening; and a main frame that fixes the subframe and supports the voice coil actuator. Is a plate-like member, and the edge is fixed to the surface of the inner periphery of the frame and the edge is fixed to the surface of the outer periphery of the frame, and the outer edge of the edge is fixed to the surface of the outer periphery of the diaphragm Is fixed to the back surface of the inner peripheral portion of the frame, and the inner peripheral portion of the edge is fixed to the rear surface of the outer peripheral portion of the diaphragm, and the front edge and the rear edge are not fixed to the main frame. Similarly, the sub-frame is fixed to the main frame.
According to the configuration of the above embodiment, the frame includes a subframe in which the frame opening is provided, and a main frame that fixes the subframe and supports the voice coil actuator. The subframe is a plate member. The edge is fixed to the surface of the inner periphery of the frame, and the edge is fixed to the surface of the outer periphery of the diaphragm, and the outer periphery of the edge is the back surface of the inner periphery of the frame. A back side edge fixed to the back surface of the diaphragm outer peripheral part. The subframe is fixed to the main frame so that the front side edge and the back side edge are not fixed to the main frame.
As a result, the tilt of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member constituting the edge.
　本発明の実施形態に係る平面側スピーカユニットは、前記サブフレームの外周部と前記サブフレームの側面とを覆うカバーフレームと、を備え、前記サブフレームの弾性率が前記カバーフレームの弾性率より小さい
　上記実施形態の構成により、カバーフレームが、前記サブフレームの外周部と前記サブフレームの側面とを覆う。前記サブフレームの弾性率が前記カバーフレームの弾性率より小さい。
　その結果、スピーカユニット全体の剛性を高め、前記振動板を支持する構造の剛性を低く維持できる。 A planar speaker unit according to an embodiment of the present invention includes a cover frame that covers an outer peripheral portion of the subframe and a side surface of the subframe, and an elastic modulus of the subframe is smaller than an elastic modulus of the cover frame. With the configuration of the above embodiment, the cover frame covers the outer peripheral portion of the subframe and the side surface of the subframe. The elastic modulus of the subframe is smaller than the elastic modulus of the cover frame.
As a result, the rigidity of the entire speaker unit can be increased, and the rigidity of the structure that supports the diaphragm can be kept low.
　本発明の実施形態に係る平面型スピーカユニットは、前記ボイスコイル式アクチエータが前記振動板に固定されたボイスコイルボビンと該ボイスコイルボビンに巻きかけられたボイスコイルと磁性材料ででき該メインフレームに固定されるヨークとヨークに固定されるマグネットと磁性材料ででき該マグネットに固定されたポールピースと該ポールピースに固定された補助マグネットとを有し、前記ボイスコイルが前記ヨークと前記ポールピースとの間に形成される空隙である磁気空隙に位置し、前記ボイスコイルが磁気空隙を流れる磁場から前記振動板の表面に直交する力を作用される。
　上記実施形態の構成により、前記ボイスコイル式アクチエータが前記振動板に固定されたボイスコイルボビンと該ボイスコイルボビンに巻きかけられたボイスコイルと磁性材料ででき該メインフレームに固定されるヨークとヨークに固定されるマグネットと磁性材料ででき該マグネットに固定されたポールピースと該ポールピースに固定された補助マグネットとを有する。前記ボイスコイルが前記ヨークと前記ポールピースとの間に形成される空隙である磁気空隙に位置する。前記ボイスコイルが磁気空隙を流れる磁場から前記振動板の表面に直交する力を作用される、
　その結果、前記振動板の傾きを抑制できる。 A planar speaker unit according to an embodiment of the present invention includes a voice coil bobbin in which the voice coil actuator is fixed to the diaphragm, a voice coil wound around the voice coil bobbin, and a magnetic material, and is fixed to the main frame. A yoke, a magnet fixed to the yoke, a pole piece made of a magnetic material, and an auxiliary magnet fixed to the pole piece, wherein the voice coil is between the yoke and the pole piece. The voice coil is applied with a force perpendicular to the surface of the diaphragm from a magnetic field flowing through the magnetic gap.
According to the configuration of the above embodiment, the voice coil actuator is made of a voice coil bobbin fixed to the diaphragm, a voice coil wound around the voice coil bobbin, and a magnetic material, and a yoke fixed to the main frame and fixed to the yoke. And a pole piece made of a magnetic material and fixed to the magnet, and an auxiliary magnet fixed to the pole piece. The voice coil is located in a magnetic gap that is a gap formed between the yoke and the pole piece. The voice coil is subjected to a force perpendicular to the surface of the diaphragm from a magnetic field flowing through a magnetic gap,
As a result, the inclination of the diaphragm can be suppressed.
　以上説明したように本発明に係る平面型スピーカユニットは、その構成により、以下の効果を有する。
　フレームのフレーム開口部に嵌まる振動板がエッジに支えられ、フレームに支持されたボイスコイル式アクチエータが振動板を駆動し、前記振動板の外周部の輪郭が複数の直線と複数の屈曲線とを交互に繋げたものであり、前記フレーム開口部の内周部が複数の直線と複数の屈曲線とを交互に繋げたものであり、前記振動板外周部と前記フレーム開口部との屈曲線の隙間が前記振動板外周部と前記フレーム開口部との直線の隙間より広くなる様にしたので、直線と屈曲線でのエッジの曲げ剛性を近似したものにしやすく、振動板が均一に面外振動して、良好な音響特性をえる。
　また、直線と直線との隙間が一定であり、屈曲線と屈曲線との隙間が直線に繋がる端部から中央部に移動するにしたがって大きくなるように変化する様にしたので、直線と屈曲線でのエッジの曲げ剛性を近似したものにしやすく、振動板が均一に面外振動して、良好な音響特性をえる。
　また、前記振動板外周部の屈曲線の曲率中心が前記フレーム内周部の屈曲線の曲率中心より内側に位置する様にしたので、屈曲線と屈曲線との隙間が直線に繋がる端部から中央部に移動するにしたがってなだらかに大きくなるように変化する。
　また、前記ボイスコイル式アクチエータを支持するメインフレームがフレーム開口部をもつ前記サブフレームを固定し、エッジが表側エッジと裏側エッジとで構成され、前記表側エッジが前記振動板の表面を支持し、前記裏側エッジが前記振動板の裏面を支持する様にしたので、エッジを構成する弾性部材の引っ張り剛性により、振動板の傾きを効率良く抑制できる。
　また、サブフレームの弾性率より大きな弾性率をもつカバーフレームがサブフレームの外周部と側面とを覆う様にしたので、スピーカユニット全体の剛性を高め、前記振動板を支持する構造の剛性を低く維持できる。
　また、ボイスコイル式アクチエータが、前記ボイスコイルボビンと前記ボイスコイルと前記ヨークと前記マグネットとポールピースと補助マグネットとで構成され、前記ボイスコイルが磁場から前記振動板の表面に直交する力を作用される様にしたので、前記振動板の傾きを抑制できる。
　従って、簡単な構造で出力が大きく音響放射する特定の安定した平面型スピーカユニットを提供できる。 As described above, the planar speaker unit according to the present invention has the following effects due to its configuration.
A diaphragm fitted into the frame opening of the frame is supported by the edge, and a voice coil actuator supported by the frame drives the diaphragm, and the contour of the outer peripheral portion of the diaphragm has a plurality of straight lines and a plurality of bent lines. And the inner periphery of the frame opening is formed by alternately connecting a plurality of straight lines and a plurality of bending lines, and the bending line between the diaphragm outer periphery and the frame opening. Since the gap between the outer periphery of the diaphragm and the opening of the frame is wider than the straight gap, it is easy to approximate the bending rigidity of the edge between the straight line and the bent line, and the diaphragm is uniformly out of plane. Vibrate to obtain good acoustic characteristics.
In addition, the gap between the straight line and the straight line is constant, and the gap between the bent line and the bent line changes so as to increase as it moves from the end connected to the straight line to the central part. It is easy to make the bending rigidity of the edge approximate, and the diaphragm vibrates uniformly out of the plane to obtain good acoustic characteristics.
In addition, since the center of curvature of the bending line of the outer peripheral part of the diaphragm is located inside the center of curvature of the bending line of the inner peripheral part of the frame, from the end where the gap between the bending line and the bending line is connected to a straight line. As it moves to the center, it changes so as to increase gently.
In addition, a main frame that supports the voice coil actuator fixes the sub-frame having a frame opening, an edge is composed of a front edge and a back edge, and the front edge supports the surface of the diaphragm, Since the back side edge supports the back surface of the diaphragm, the inclination of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member constituting the edge.
In addition, since the cover frame having an elastic modulus larger than the elastic modulus of the subframe covers the outer periphery and the side surface of the subframe, the rigidity of the entire speaker unit is increased and the rigidity of the structure supporting the diaphragm is reduced. Can be maintained.
Further, the voice coil actuator is composed of the voice coil bobbin, the voice coil, the yoke, the magnet, a pole piece, and an auxiliary magnet, and the voice coil is subjected to a force perpendicular to the surface of the diaphragm from a magnetic field. Therefore, the tilt of the diaphragm can be suppressed.
Therefore, it is possible to provide a specific stable planar speaker unit that emits sound with a large structure and a simple output.
本発明の第一の実施形態に係る平面型スピーカユニットの平面図である。1 is a plan view of a flat speaker unit according to a first embodiment of the present invention. 本発明の第一の実施形態に係る平面型スピーカユニットの側面図である。1 is a side view of a flat speaker unit according to a first embodiment of the present invention. 本発明の第一の実施形態に係る平面型スピーカユニットの底面図である。It is a bottom view of the flat type speaker unit concerning a first embodiment of the present invention. 本発明の第一の実施形態に係る平面型スピーカユニットの正面図である。It is a front view of the planar speaker unit concerning a first embodiment of the present invention. 本発明の第一の実施形態に係る平面型スピーカユニットのＡ－Ａ線断面図である。FIG. 3 is a cross-sectional view of the flat speaker unit according to the first embodiment of the present invention taken along line AA. 本発明の第一の実施形態に係る平面型スピーカユニットの部分断面図である。It is a fragmentary sectional view of the planar speaker unit concerning a first embodiment of the present invention. 本発明の第一の実施形態に係る平面型スピーカユニットのＢ－Ｂ線断面図である。FIG. 3 is a cross-sectional view of the flat speaker unit according to the first embodiment of the present invention taken along line BB. 本発明の第二の実施形態に係る平面型スピーカユニットのＢ－Ｂ線断面図である。It is a BB line sectional view of a flat type speaker unit concerning a second embodiment of the present invention. 本発明の第三の実施形態に係る平面型スピーカユニットのＢ－Ｂ線断面図である。It is a BB line sectional view of a plane type speaker unit concerning a third embodiment of the present invention.
　以下、本発明を実施するための最良の形態を、図面を参照して説明する。 Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
　最初に、本発明の第一の実施形態に係平面型スピーカユニットを、図を基に、説明する
　図１は、本発明の第一の実施形態に係る平面型スピーカユニットの平面図である。図２は、本発明の第一の実施形態に係る平面型スピーカユニットの側面図である。図３は、本発明の第一の実施形態に係る平面型スピーカユニットの底面図である。図４は、本発明の第一の実施形態に係る平面型スピーカユニットの正面図である。図５は、本発明の第一の実施形態に係る平面型スピーカユニットのＡ－Ａ線断面図である。図６は、本発明の第一の実施形態に係る平面型スピーカユニットの部分断面図である。図７は、本発明の第一の実施形態に係る平面型スピーカユニットのＢ－Ｂ線断面図である。 First, the engaging planar speaker unit according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the planar speaker unit according to the first embodiment of the present invention. FIG. 2 is a side view of the flat speaker unit according to the first embodiment of the present invention. FIG. 3 is a bottom view of the flat speaker unit according to the first embodiment of the present invention. FIG. 4 is a front view of the flat speaker unit according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line AA of the flat speaker unit according to the first embodiment of the present invention. FIG. 6 is a partial cross-sectional view of the flat speaker unit according to the first embodiment of the present invention. FIG. 7 is a sectional view taken along line BB of the flat speaker unit according to the first embodiment of the present invention.
　平面型スピーカユニットは、音響の放射面が平面であるスピーカのユニットである。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００とボイスコイル式アクチエータ４００とで構成される。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００と複数のボイスコイル式アクチエータ４００とで構成されてっもよい。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００と複数のボイスコイル式アクチエータ４００とカバーフレーム５００とで構成されてもよい。 The flat speaker unit is a speaker unit having a flat acoustic radiation surface.
The flat speaker unit includes a diaphragm 100, a frame 200, an edge 300, and a voice coil actuator 400.
The flat speaker unit may be composed of the diaphragm 100, the frame 200, the edge 300, and a plurality of voice coil actuators 400.
The planar speaker unit may include the diaphragm 100, the frame 200, the edge 300, a plurality of voice coil actuators 400, and the cover frame 500.
　振動板１００は、平面状の音響の放射面をもつ板状部材である。
　振動板１００は、複数の直線Ｌと複数の屈曲線Ｑとが交互に繋がってできた輪郭を形成する外周部である振動板外周部を持つ平板でできている。
　屈曲線Ｑは、折線または曲線のうちの一方またはそれらの組み合わされた線である。
　振動板１００は、振動板表板１０１と振動板本体１０２と振動板裏板１０３とで構成される。
　振動板表板１０１は、振動板１００の表面を形成する板材であり、振動板本体１０２の表側に接着される。
　振動板本体１０２は、所定の厚みをもつ板材である。
　振動板裏板１９３は、振動板１００の裏面を形成する板材であり、振動板本体１０２の裏側に接着される。 The diaphragm 100 is a plate-like member having a planar acoustic radiation surface.
The diaphragm 100 is made of a flat plate having a diaphragm outer peripheral portion which is an outer peripheral portion forming an outline formed by alternately connecting a plurality of straight lines L and a plurality of bending lines Q.
The bending line Q is one of a broken line or a curved line or a combination thereof.
The diaphragm 100 includes a diaphragm front plate 101, a diaphragm main body 102, and a diaphragm back plate 103.
The diaphragm front plate 101 is a plate material that forms the surface of the diaphragm 100 and is bonded to the front side of the diaphragm main body 102.
The diaphragm main body 102 is a plate material having a predetermined thickness.
The diaphragm back plate 193 is a plate material that forms the back surface of the diaphragm 100, and is bonded to the back side of the diaphragm main body 102.
　フレーム２００は、平面型スピーカユニットの主構造体である。
　フレーム２００は、後述するボイスコイル式アクチエータ４００を支持する。
　フレーム２００は、複数の直線と複数の屈曲線とが交互に繋がった輪郭を形成する内周部であるフレーム内周部でできた開口部であるフレーム開口部Ｏを設けられる。
　フレーム２００は、サブフレーム２１０とメインフレーム２２０とで構成されてもよい。
　例えば、サブフレーム２１０は、フレーム開口部Ｏを設けられる。
　例えば、メインフレーム２２０は、サブフレーム２１０を固定しボイスコイル式アクチエータを支持する。
　サブフレーム２１０の弾性率がメインフレーム２２０の弾性率より小さくてもよい。
　例えば、サブフレームの材質が樹脂であって、メインフレームの材質が金属である。
　サブフレーム２１０が、板状部材であってもよい。
　サブフレーム２１０は、エッジ外周部を固着する面を設けられる。
　サブフレーム２１０は、表面と裏面とにエッジ外周部を固着する面を設けられる。
　サブフレーム２１０は、板状部材の面から一段の段差を設けてエッジ内周部を固着する面を設けられてもよい。 The frame 200 is a main structure of the flat speaker unit.
The frame 200 supports a voice coil actuator 400 described later.
The frame 200 is provided with a frame opening O that is an opening made of an inner periphery of the frame, which is an inner periphery that forms an outline in which a plurality of straight lines and a plurality of bent lines are alternately connected.
The frame 200 may include a subframe 210 and a main frame 220.
For example, the subframe 210 is provided with a frame opening O.
For example, the main frame 220 fixes the sub-frame 210 and supports a voice coil actuator.
The elastic modulus of the sub frame 210 may be smaller than the elastic modulus of the main frame 220.
For example, the material of the subframe is resin, and the material of the main frame is metal.
The subframe 210 may be a plate-like member.
The subframe 210 is provided with a surface for fixing the outer peripheral portion of the edge.
The subframe 210 is provided with a surface for fixing the outer periphery of the edge on the front surface and the back surface.
The subframe 210 may be provided with a surface for fixing the inner periphery of the edge by providing one step from the surface of the plate-like member.
　振動板外周部とフレーム内周部とが接触しない様に振動板がフレーム開口部に嵌まる。
　振動板外周部の屈曲線とフレーム内周部の屈曲線との１対の端部に挟まれた端部を除く箇所の隙間が振動板外周部の直線とフレーム内周部の直線との隙間より広い。
　振動板外周部の直線とフレーム内周部の直線との隙間が一定の幅寸法をもち、振動板外周部の屈曲線とフレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもっていてもよい。 The diaphragm fits into the frame opening so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
The gap between the bending edge of the diaphragm outer peripheral part and the bending line of the inner peripheral part of the frame excluding the ends sandwiched between the pair of end parts is the clearance between the straight line of the outer peripheral part of the diaphragm and the straight line of the inner peripheral part of the frame Wider.
The gap between the straight line at the outer peripheral part of the diaphragm and the straight line at the inner peripheral part of the frame has a constant width, and the gap between the bent line at the outer peripheral part of the diaphragm and the bent line at the inner peripheral part of the frame is a pair of ends of the bent line. You may have the width dimension which changes so that it may become large as it moves to a middle part from a part.
　屈曲線が一定の曲率半径をもつ曲線であり、フレーム内周部の屈曲線がフレーム内周部の直線に滑らかに繋がり、振動板外周部の屈曲線が振動板外周部の直線に滑らかに繋がり、振動板外周部の屈曲線の曲率中心がフレーム内周部の屈曲線の曲率中心より内側に位置してもよい。
　振動板外周部の屈曲線の曲率半径Ｒ２とフレーム内周部の屈曲線の曲率半径Ｒ１とが略一致してもよい。 The bend line is a curve with a certain radius of curvature, the bend line at the inner periphery of the frame is smoothly connected to the straight line at the inner periphery of the frame, and the bend line at the outer periphery of the diaphragm is smoothly connected to the straight line at the outer periphery of the diaphragm In addition, the center of curvature of the bending line on the outer peripheral part of the diaphragm may be located inside the center of curvature of the bending line on the inner peripheral part of the frame.
The curvature radius R2 of the bending line of the outer peripheral part of the diaphragm and the curvature radius R1 of the bending line of the inner peripheral part of the frame may substantially coincide.
　エッジ３００は、外周部であるエッジ外周部と内周部であるエッジ内周部とをもつ環状の弾性部材であって、エッジ外周部をフレーム内周部に固着され、エッジ内周部を振動板外周部に固着される。
　エッジ３００は、エッジ外周部３０１とエッジ湾曲部３０２とエッジ内周部３０３とを持つ弾性部材であってもよい。
　エッジ外周部３０１は、所定の厚みで形成される断面を持つ。
　エッジ湾曲部３０２は、面外に湾曲する断面を持つ。
　例えば、エッジ湾曲部３０２は、所定の厚みを形成し表側に湾曲する断面を持つ。
　エッジ内周部３０３は、所定の厚みを形成される断面を持つ。 The edge 300 is an annular elastic member having an edge outer peripheral portion which is an outer peripheral portion and an edge inner peripheral portion which is an inner peripheral portion, and the edge outer peripheral portion is fixed to the frame inner peripheral portion and the edge inner peripheral portion vibrates. Fixed to the outer periphery of the plate.
The edge 300 may be an elastic member having an edge outer peripheral portion 301, an edge curved portion 302, and an edge inner peripheral portion 303.
The edge outer peripheral portion 301 has a cross section formed with a predetermined thickness.
The edge bending portion 302 has a cross section that curves out of plane.
For example, the edge bending portion 302 has a cross section that forms a predetermined thickness and curves to the front side.
The edge inner peripheral portion 303 has a cross section having a predetermined thickness.
　エッジ３００がメインフレーム２２０に固着しない様に、サブフレーム２１０がメインフレーム２２０に固定されてもよい。
　エッジ３００がメインフレーム２２０に接触しない様に、サブフレーム２１０がメインフレーム２２０に固定されてもよい。 The sub frame 210 may be fixed to the main frame 220 so that the edge 300 is not fixed to the main frame 220.
The sub frame 210 may be fixed to the main frame 220 so that the edge 300 does not contact the main frame 220.
　エッジ３００は、表側エッジ３１０と裏側エッジ３２０とで構成されてもよい。
　表側エッジ３１０は、エッジ外周部３０１とエッジ湾曲部３０２とエッジ内周部３０３とを持つ弾性部材であってもよい。
　表側エッジ３１０は、エッジ外周部をフレーム内周部の表面に固着され、エッジ内周部を振動板外周部の表面に固着される。
　裏側エッジ３２０は、エッジ外周部３０１とエッジ湾曲部３０２とエッジ内周部３０３とを持つ弾性部材である。
　裏側エッジ３２０は、エッジ外周部をフレーム内周部の裏面に固着され、エッジ内周部を振動板外周部の裏面に固着される。
　エッジ外周部３０１は、所定の厚みで形成される断面を持つ。
　エッジ湾曲部３０２は、面外に湾曲する断面を持つ。
　表側エッジ３１０のエッジ湾曲部３０２は、所定の厚みを形成し表側に湾曲する断面を持つ。
　裏側エッジ３２０のエッジ湾曲部３０２は、所定の厚みを形成し裏側に湾曲する断面を持つ。
　エッジ内周部３０３は、所定の厚みを形成される断面を持つ。 The edge 300 may be composed of a front side edge 310 and a back side edge 320.
The front edge 310 may be an elastic member having an edge outer peripheral portion 301, an edge curved portion 302, and an edge inner peripheral portion 303.
The front edge 310 has an edge outer periphery fixed to the surface of the frame inner periphery, and an edge inner periphery fixed to the surface of the diaphragm outer periphery.
The back side edge 320 is an elastic member having an edge outer peripheral portion 301, an edge curved portion 302, and an edge inner peripheral portion 303.
The back edge 320 has an edge outer peripheral portion fixed to the back surface of the frame inner peripheral portion, and an edge inner peripheral portion fixed to the rear surface of the diaphragm outer peripheral portion.
The edge outer peripheral portion 301 has a cross section formed with a predetermined thickness.
The edge bending portion 302 has a cross section that curves out of plane.
The edge bending portion 302 of the front side edge 310 has a cross section that forms a predetermined thickness and curves to the front side.
The edge curved portion 302 of the back side edge 320 has a cross section that forms a predetermined thickness and curves to the back side.
The edge inner peripheral portion 303 has a cross section having a predetermined thickness.
　表側エッジ３１０と裏側エッジ３２０とがメインフレーム２２０に固着しない様に、サブフレーム２１０がメインフレーム２２０に固定されてもよい。
　表側エッジ３１０と裏側エッジ３２０とがメインフレーム２２０に接触しない様に、サブフレーム２１０がメインフレーム２２０に固定されてもよい。 The sub frame 210 may be fixed to the main frame 220 so that the front side edge 310 and the back side edge 320 are not fixed to the main frame 220.
The sub frame 210 may be fixed to the main frame 220 so that the front side edge 310 and the back side edge 320 do not contact the main frame 220.
　ボイスコイル式アクチエータ４００は、フレーム２００に支持され振動板１００を面外振動する様に駆動するものである。
　ボイスコイル式アクチエータ４００は、メインフレーム２２０に支持され振動板１００を面外振動する様に駆動するものであってもよい。
　ボイスコイル式アクチエータ４００は、ボイスコイルボビン４１０とボイスコイル４２０とヨーク５３０とマグネット５４０とポールピース５５０と補助マグネット５６０とで構成される。
　ボイスコイルボビン４１０は、振動板に固定される。
　例えば、ボイスコイルボビン４１０は、筒状の形状をする部材であり、一端を振動板１００に固定される。
　　例えば、ボイスコイルボビン４１０は、円筒状の形状をする部材であり、一端を振動板１００の裏面に固定される。
　ボイスコイル４２０は、ボイスコイルボビンに巻きかけられた電線である。 The voice coil actuator 400 is supported by the frame 200 and drives the diaphragm 100 to vibrate out of plane.
The voice coil actuator 400 may be supported by the main frame 220 and drive the diaphragm 100 to vibrate out of plane.
Voice coil actuator 400 includes voice coil bobbin 410, voice coil 420, yoke 530, magnet 540, pole piece 550, and auxiliary magnet 560.
The voice coil bobbin 410 is fixed to the diaphragm.
For example, the voice coil bobbin 410 is a member having a cylindrical shape, and one end is fixed to the diaphragm 100.
For example, the voice coil bobbin 410 is a member having a cylindrical shape, and one end is fixed to the back surface of the diaphragm 100.
The voice coil 420 is an electric wire wound around the voice coil bobbin.
　ヨーク４３０は、磁性材料でできメインフレーム２２０に固定される。
　例えば、ヨーク４３０は、磁性材料ででき底を閉じた筒状の形状をする。
　例えば、ヨーク４３０は、磁性材料ででき底を閉じた円筒状の形状をする。
　マグネット４４０が、ヨーク４３０に固定される。
　例えば、マグネット４４０は、柱状の形状をし、一端をヨーク４３０の底面に固着される。
　例えば、マグネット４４０は、円柱状の形状をし、一端をヨーク４３０の底面に固着される。
　ポールピース４５０は、磁性材料ででき該マグネットに固定される。
　例えば、ポールピース４５０は、磁性材料でできた板状部材で、マグネット４４０の他端に固定される。
　例えば、ポールピース４５０は、磁性材料でできた円板状部材で、マグネット４４０の他端に固定される。
　ポールピース４５０の外周とヨーク４３０の内面とで形成される隙間が、磁気空隙を形成する。
　ボイスコイル４２０が、磁気空間に位置する。
　補助マグネット５６０は、ポールピース４５０に固定される。
　交番電圧がボイスコイル４２０に印加されると、ボイスコイルボビン４１０が電磁気力により上下方向に力を作用され、振動板１００を面外振動するように駆動する。 The yoke 430 is made of a magnetic material and is fixed to the main frame 220.
For example, the yoke 430 is made of a magnetic material and has a cylindrical shape with a closed bottom.
For example, the yoke 430 is made of a magnetic material and has a cylindrical shape with a closed bottom.
A magnet 440 is fixed to the yoke 430.
For example, the magnet 440 has a columnar shape, and one end is fixed to the bottom surface of the yoke 430.
For example, the magnet 440 has a cylindrical shape, and one end is fixed to the bottom surface of the yoke 430.
The pole piece 450 is made of a magnetic material and is fixed to the magnet.
For example, the pole piece 450 is a plate-like member made of a magnetic material and is fixed to the other end of the magnet 440.
For example, the pole piece 450 is a disk-shaped member made of a magnetic material and is fixed to the other end of the magnet 440.
A gap formed between the outer periphery of the pole piece 450 and the inner surface of the yoke 430 forms a magnetic gap.
The voice coil 420 is located in the magnetic space.
The auxiliary magnet 560 is fixed to the pole piece 450.
When an alternating voltage is applied to the voice coil 420, the voice coil bobbin 410 is acted upon by an electromagnetic force in the vertical direction to drive the diaphragm 100 to vibrate out of plane.
　カバーフレーム５００は、フレーム２００の表側を覆うフレームである。
　カバーフレーム５００は、サブフレーム２１０の外周部を覆う。
　カバーフレーム５００は、サブフレーム２１０の外周部と側面とを覆ってもよい。
　カバーフレーム５００は、サブフレーム２１０のフレーム開口部を除く表面と側面とを覆ってもよい。
　前記サブフレームの弾性率が前記カバーフレームの弾性率より小さくてもよい。
　例えば、サブフレーム２１０が樹脂製であって、カバーフレーム５００が金属製である。
　例えば、サブフレーム２１０とメインフレーム２２０とが樹脂製であり、カバーフレーム５００が金属製である。
　例えば、サブフレーム２１０が樹脂製であり、メインフレーム２２０とカバーフレーム５００とが金属製である。
　表側エッジ３１０と裏側エッジ３２０とがメインフレーム２２０とカバーフレーム５００とに固着しない様に、カバーフレーム５００とサブフレーム２１０とメインフレーム２２０とが固定されてもよい。
　表側エッジ３１０と裏側エッジ３２０とがメインフレーム２２０とカバーフレーム５００とに接触しない様に、カバーフレーム５００とサブフレーム２１０とメインフレーム２２０とが固定されてもよい。 The cover frame 500 is a frame that covers the front side of the frame 200.
The cover frame 500 covers the outer periphery of the subframe 210.
The cover frame 500 may cover the outer peripheral portion and the side surface of the subframe 210.
The cover frame 500 may cover the surface and side surfaces of the subframe 210 excluding the frame opening.
The elastic modulus of the subframe may be smaller than the elastic modulus of the cover frame.
For example, the sub frame 210 is made of resin, and the cover frame 500 is made of metal.
For example, the sub frame 210 and the main frame 220 are made of resin, and the cover frame 500 is made of metal.
For example, the sub frame 210 is made of resin, and the main frame 220 and the cover frame 500 are made of metal.
The cover frame 500, the sub frame 210, and the main frame 220 may be fixed so that the front side edge 310 and the back side edge 320 are not fixed to the main frame 220 and the cover frame 500.
The cover frame 500, the sub frame 210, and the main frame 220 may be fixed so that the front side edge 310 and the back side edge 320 do not contact the main frame 220 and the cover frame 500.
　振動板１００の振動板外周部とフレーム開口部Ｏのフレーム内周部とで形成される隙間について詳述する。
　図７は、本発明の第一の実施形態に係る平面型スピーカユニットの振動板１００の振動板外周部とフレーム開口部Ｏのフレーム内周部とを図示する。
　図７中で、理解の容易のために、エッジ３００を二点破線で描いた。
　振動板１００の振動板外周部の輪郭が、４つの直線Ｌと４つの曲線Ｑとが交互に繋がってできる。
　フレーム開口部Ｏのフレーム内周部の輪郭が、４つの直線Ｌと４つの曲線Ｑとが交互に繋がってできる。
　振動板外周部とフレーム内周部とが接触しない様に振動板１００がフレーム開口部Ｏに嵌まる。
　振動板１００の振動板外周部の輪郭の４つの直線Ｌが、フレーム開口部Ｏのフレーム内周部の輪郭の４つの直線Ｌに各々に対面する。
　振動板１００の振動板外周部の輪郭の４つの曲線Ｑが、フレーム開口部Ｏのフレーム内周部の輪郭の４つの曲線Ｑに各々に対面する。
　振動板１００の振動板外周部の輪郭の４つの曲線Ｑが、外側にふくらんだ曲率半径Ｒ２を持つ。
　フレーム開口部Ｏの振動板内周部の輪郭の４つの曲線Ｑが、外側にふくらんだ曲率半径Ｒ１を持つ。
　振動板１００の振動板外周部の屈曲線の曲率中心がフレーム内周部の屈曲線の曲率中心より内側に位置する。
　その結果、振動板外周部の直線とフレーム内周部の直線との隙間が一定の幅寸法をもち、振動板外周部の屈曲線とフレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもつ。 The gap formed between the outer peripheral part of the diaphragm 100 and the inner peripheral part of the frame opening O will be described in detail.
FIG. 7 illustrates the diaphragm outer periphery of the diaphragm 100 and the frame inner periphery of the frame opening O of the flat speaker unit according to the first embodiment of the present invention.
In FIG. 7, for easy understanding, the edge 300 is drawn with a two-dot broken line.
The contour of the outer peripheral portion of the diaphragm 100 is formed by alternately connecting four straight lines L and four curves Q.
The outline of the inner periphery of the frame opening O is formed by alternately connecting four straight lines L and four curved lines Q.
The diaphragm 100 is fitted into the frame opening O so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
The four straight lines L of the contour of the diaphragm outer periphery of the diaphragm 100 face the four straight lines L of the contour of the inner periphery of the frame opening O, respectively.
Four curves Q of the contour of the diaphragm outer periphery of the diaphragm 100 face the four curves Q of the contour of the inner periphery of the frame opening O, respectively.
The four curves Q of the outline of the diaphragm outer periphery of the diaphragm 100 have a radius of curvature R2 bulging outward.
The four curves Q of the outline of the diaphragm inner periphery of the frame opening O have a radius of curvature R1 that bulges outward.
The center of curvature of the bend line at the outer periphery of the diaphragm 100 is located inside the center of curvature of the bend line at the inner periphery of the frame.
As a result, the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension, and the gap between the bending line of the diaphragm outer peripheral part and the bending line of the frame inner peripheral part is one of the bending lines. It has a width that changes to increase as it moves from the end of the pair to the middle.
　次に、本発明の第二の実施形態にかかる平面型スピーカユニットを、図を基に、説明する。
　図８は、本発明の第二の実施形態に係る平面型スピーカユニットのＢ－Ｂ線断面図である。 Next, a flat speaker unit according to a second embodiment of the present invention will be described with reference to the drawings.
FIG. 8 is a sectional view taken along line BB of the flat speaker unit according to the second embodiment of the present invention.
　平面型スピーカユニットは、音響の放射面が平面であるスピーカのユニットである。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００とボイスコイル式アクチエータ４００とで構成される。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００とボイスコイル式アクチエータ４００とカバーフレーム５００で構成されてもよい。
　振動板１００の外周部とフレーム開口部Ｏと内周部とで形成される隙間を除く構造は、第一の実施形態にかかる平面型スピーカユニットのものと同じなので説明を省略する。 The flat speaker unit is a speaker unit having a flat acoustic radiation surface.
The flat speaker unit includes a diaphragm 100, a frame 200, an edge 300, and a voice coil actuator 400.
The planar speaker unit may include the diaphragm 100, the frame 200, the edge 300, the voice coil actuator 400, and the cover frame 500.
Since the structure excluding the gap formed by the outer peripheral portion of the diaphragm 100, the frame opening O, and the inner peripheral portion is the same as that of the planar speaker unit according to the first embodiment, the description thereof is omitted.
　振動板１００の外周部とフレーム開口部Ｏの内周部とで形成される隙間について詳述する。
　図８は、本発明の第二の実施形態に係る平面型スピーカユニットの振動板１００の振動板外周部とフレーム開口部Ｏのフレーム内周部とを図示する。
　図８中で、理解の容易のために、エッジ３００を二点破線で描いた。
　振動板１００の振動板外周部の輪郭が、４つの直線Ｌと４つの折線Ｑとが交互に繋がってできる。
　フレーム開口部Ｏのフレーム内周部の輪郭が、４つの直線Ｌと４つの折線Ｑとが交互に繋がってできる。
　振動板外周部とフレーム内周部とが接触しない様に振動板がフレーム開口部Ｏに嵌まる。
　振動板１００の振動板外周部の輪郭の４つの直線Ｌが、フレーム開口部Ｏのフレーム内周部の輪郭の４つの直線Ｌに各々に対面する。
　振動板１００の振動板外周部の輪郭の４つの折線Ｑが、フレーム開口部Ｏのフレーム内周部の輪郭の４つの折線Ｑに各々に対面する。
　その結果、振動板外周部の直線とフレーム内周部の直線との隙間が一定の幅寸法をもち、振動板外周部の屈曲線とフレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもつ。 A gap formed between the outer periphery of the diaphragm 100 and the inner periphery of the frame opening O will be described in detail.
FIG. 8 illustrates the diaphragm outer peripheral portion of the diaphragm 100 and the frame inner peripheral portion of the frame opening O of the flat speaker unit according to the second embodiment of the present invention.
In FIG. 8, the edge 300 is drawn with a two-dot broken line for easy understanding.
The outline of the outer peripheral part of the diaphragm 100 of the diaphragm 100 is formed by alternately connecting four straight lines L and four broken lines Q.
The outline of the inner periphery of the frame opening O is formed by alternately connecting four straight lines L and four folding lines Q.
The diaphragm fits into the frame opening O so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
The four straight lines L of the contour of the diaphragm outer periphery of the diaphragm 100 face the four straight lines L of the contour of the inner periphery of the frame opening O, respectively.
The four fold lines Q of the contour of the diaphragm outer periphery of the diaphragm 100 face the four fold lines Q of the contour of the inner periphery of the frame opening O, respectively.
As a result, the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension, and the gap between the bending line of the diaphragm outer peripheral part and the bending line of the frame inner peripheral part is one of the bending lines. It has a width that changes to increase as it moves from the end of the pair to the middle.
　次に、本発明の第三の実施形態にかかる平面型スピーカユニットを、図を基に、説明する。
　図９は、本発明の第三の実施形態に係る平面型スピーカユニットのＢ－Ｂ線断面図である。 Next, a flat speaker unit according to a third embodiment of the present invention will be described with reference to the drawings.
FIG. 9 is a sectional view taken along line BB of the flat speaker unit according to the third embodiment of the present invention.
　平面型スピーカユニットは、音響の放射面が平面であるスピーカのユニットである。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００とボイスコイル式アクチエータ４００とで構成される。
　平面型スピーカユニットは、振動板１００とフレーム２００とエッジ３００とボイスコイル式アクチエータ４００とカバーフレーム５００で構成されてもよい。
　振動板１００の振動板外周部とフレーム開口部Ｏとフレーム内周部とで形成される隙間を除く構造は、第一の実施形態にかかる平面型スピーカユニットのものと同じなので説明を省略する。 The flat speaker unit is a speaker unit having a flat acoustic radiation surface.
The flat speaker unit includes a diaphragm 100, a frame 200, an edge 300, and a voice coil actuator 400.
The planar speaker unit may include the diaphragm 100, the frame 200, the edge 300, the voice coil actuator 400, and the cover frame 500.
Since the structure excluding the gap formed by the diaphragm outer peripheral portion, the frame opening O and the frame inner peripheral portion of the diaphragm 100 is the same as that of the planar speaker unit according to the first embodiment, the description thereof is omitted.
　振動板１００の振動板外周部とフレーム開口部Ｏのフレーム内周部とで形成される隙間について詳述する。
　図７は、本発明の第一の実施形態に係る平面型スピーカユニットの振動板１００の外周部とフレーム開口部Ｏと内周部とを図示する。
　図７中で、理解の容易のために、エッジ３００を二点破線で描いた。
　振動板１００の振動板外周部の輪郭が、４つの直線Ｌと４つの曲線Ｑとが交互に繋がってできる。
　フレーム開口部Ｏのフレーム内周部の輪郭が、４つの直線Ｌと４つの曲線Ｑとが交互に繋がってできる。
　振動板外周部とフレーム内周部とが接触しない様に振動板１００がフレーム開口部Ｏに嵌まる。
　振動板１００の振動板外周部の輪郭の４つの直線Ｌが、フレーム開口部Ｏのフレーム内周部の輪郭の４つの直線Ｌに各々に対面する。
　振動板１００の振動板外周部の輪郭の４つの曲線Ｑが、フレーム開口部Ｏのフレーム内周部の輪郭の４つの曲線Ｑに各々に対面する。
　振動板１００の振動板外周部の輪郭の４つの曲線Ｑが、内側にふくらんだ曲率半径Ｒ２を持つ。
　フレーム開口部Ｏのフレーム内周部の輪郭の４つの曲線Ｑが、外側にふくらんだ曲率半径Ｒ１を持つ。
　その結果、振動板外周部の直線とフレーム内周部の直線との隙間が一定の幅寸法をもち、振動板外周部の屈曲線とフレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもつ。 The gap formed between the outer peripheral part of the diaphragm 100 and the inner peripheral part of the frame opening O will be described in detail.
FIG. 7 illustrates the outer periphery, the frame opening O, and the inner periphery of the diaphragm 100 of the flat speaker unit according to the first embodiment of the present invention.
In FIG. 7, for easy understanding, the edge 300 is drawn with a two-dot broken line.
The contour of the outer peripheral portion of the diaphragm 100 is formed by alternately connecting four straight lines L and four curves Q.
The outline of the inner periphery of the frame opening O is formed by alternately connecting four straight lines L and four curved lines Q.
The diaphragm 100 is fitted into the frame opening O so that the outer peripheral part of the diaphragm and the inner peripheral part of the frame do not contact each other.
The four straight lines L of the contour of the diaphragm outer periphery of the diaphragm 100 face the four straight lines L of the contour of the inner periphery of the frame opening O, respectively.
Four curves Q of the contour of the diaphragm outer periphery of the diaphragm 100 face the four curves Q of the contour of the inner periphery of the frame opening O, respectively.
The four curves Q of the contour of the diaphragm outer periphery of the diaphragm 100 have a radius of curvature R2 that bulges inward.
The four curves Q of the outline of the frame inner periphery of the frame opening O have a curvature radius R1 bulging outward.
As a result, the gap between the straight line of the diaphragm outer peripheral part and the straight line of the frame inner peripheral part has a constant width dimension, and the gap between the bending line of the diaphragm outer peripheral part and the bending line of the frame inner peripheral part is one of the bending lines. It has a width that changes to increase as it moves from the end of the pair to the middle.
　上述のとおり、本発明の実施実施形態に係る平面型スピーカユニットを用いれば、以下の効果を有する。
　フレーム２００に設けられるフレーム開口部Ｏに嵌まる振動板１００がエッジ３００に支えられ、フレーム２００に支持されたボイスコイル式アクチエータ４００が振動板を駆動し、振動板１００の振動板外周部の輪郭がＮ個の直線とＮ個の屈曲線とを交互に繋げたものであり、フレーム開口部のフレーム内周部がＮ個の直線とＮ個の屈曲線とを交互に繋げたものであり、振動板外周部とフレーム開口部との屈曲線の隙間が振動板外周部とフレーム開口部との直線の隙間より広くなる様にしたので、直線でのエッジの曲げ剛性と屈曲線でのエッジの曲げ剛性とを近似したものにしやすく、振動板１００が均一に面外振動して、良好な音響特性をえる。
　また、Ｎ個の直線とＮ個の直線との隙間が一定であり、屈曲線と屈曲線との隙間が１対の端部から中央部に移動するにしたがって大きくなるように変化するので、直線のエッジの曲げ剛性と屈曲線でのエッジの曲げ剛性とを近似したものにしやすく、振動板１００が均一に面外振動して、良好な音響特性をえる。
　また、屈曲線が一定の曲率半径をもつ曲線であり、振動板外周部の屈曲線の曲率中心がフレーム内周部の屈曲線の曲率中心より内側に位置する様にしたので、曲線と曲線との隙間が直線に繋がる端部から中央部に移動するにしたがってなだらかに大きくなるように変化する。
　また、ボイスコイル式アクチエータ４００を支持するメインフレーム２２０がフレーム開口部を設けられるサブフレーム２１０を固定し、サブフレーム２１０の弾性率がメインフレーム２２０の弾性率より小さい様にしたので、ボイスコイル式アクチエータ４００を支持する構造の剛性を高く維持し、振動板１００を支持する構造の剛性を低く維持できる。
　また、エッジ３００が表側エッジ３１０と裏側エッジ３２０とで構成され、表側エッジ３１０が振動板１００の表面を支持し、裏側エッジ３２０が振動板１００の裏面を支持する様にしたので、エッジ３００を構成する弾性部材の引っ張り剛性により、振動板の傾きを効率良く抑制できる。
　また、ボイスコイル式アクチエータ４００を支持するメインフレーム２２０がフレーム開口部を設けられるサブフレーム２１０を固定しエッジ３００が表側エッジ３１０と裏側エッジ３２０とで構成され、表側エッジ３１０が振動板１００の表面を支持し、裏側エッジ３２０が振動板１００の裏面を支持する様にしたので、エッジ３００を構成する弾性部材の引っ張り剛性により、振動板の傾きを効率良く抑制できる。
　また、サブフレーム２１０の弾性率より大きな弾性率をもつカバーフレーム５００がサブフレーム２１０の外周部と側面とを覆う様にしたので、スピーカユニット全体の剛性を高め、振動板１００を支持する構造の剛性を低く維持できる。
　また、サブフレーム２１０の弾性率より大きな弾性率をもつカバーフレーム５００がサブフレーム２１０のフレーム開口部Ｏを除く表面と側面とを覆う様にしたので、スピーカユニット全体の剛性を高め、振動板１００を支持する構造の剛性を低く維持できる。
　また、ボイスコイル式アクチエータ４００が、ボイスコイルボビン４１０とボイスコイル４２０とヨーク４３０とマグネット４４０とポールピース４５０と補助マグネット４６０とで構成され、ボイスコイル４２０が磁場から振動板１００の表面に直交する力を作用される様にしたので、振動板１００の傾きを抑制できる。 As described above, the use of the planar speaker unit according to the embodiment of the present invention has the following effects.
The diaphragm 100 fitted in the frame opening O provided in the frame 200 is supported by the edge 300, and the voice coil actuator 400 supported by the frame 200 drives the diaphragm, and the outline of the diaphragm outer peripheral portion of the diaphragm 100. Are the N straight lines and N bent lines alternately connected, and the frame inner periphery of the frame opening is the N straight lines and N bent lines alternately connected, Since the gap between the bending line between the diaphragm outer periphery and the frame opening is wider than the straight gap between the diaphragm outer periphery and the frame opening, the bending rigidity of the edge at the straight line and the edge at the bending line are The bending rigidity can be easily approximated, and the diaphragm 100 can evenly vibrate out-of-plane to obtain good acoustic characteristics.
Further, the gap between the N straight lines and the N straight lines is constant, and the gap between the bending line and the bending line changes so as to increase as it moves from the pair of end portions to the central portion. The bending rigidity of the edge and the bending rigidity of the edge at the bending line can be easily approximated, and the diaphragm 100 can vibrate uniformly out of plane to obtain good acoustic characteristics.
In addition, the bend line is a curve having a constant radius of curvature, and the center of curvature of the bend line on the outer peripheral part of the diaphragm is positioned inside the center of curvature of the bend line on the inner peripheral part of the frame. The gap changes gradually so as to move from the end connected to the straight line to the center.
In addition, the main frame 220 supporting the voice coil actuator 400 fixes the sub frame 210 provided with the frame opening, and the elastic modulus of the sub frame 210 is smaller than the elastic modulus of the main frame 220. The rigidity of the structure that supports the actuator 400 can be kept high, and the rigidity of the structure that supports the diaphragm 100 can be kept low.
Further, the edge 300 is constituted by the front side edge 310 and the back side edge 320, the front side edge 310 supports the surface of the diaphragm 100, and the back side edge 320 supports the back surface of the diaphragm 100. The inclination of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member to be configured.
Further, the main frame 220 that supports the voice coil actuator 400 fixes the sub-frame 210 provided with the frame opening, the edge 300 is constituted by the front edge 310 and the back edge 320, and the front edge 310 is the surface of the diaphragm 100. Since the back edge 320 supports the back surface of the diaphragm 100, the inclination of the diaphragm can be efficiently suppressed by the tensile rigidity of the elastic member constituting the edge 300.
Further, since the cover frame 500 having an elastic modulus larger than the elastic modulus of the subframe 210 covers the outer peripheral portion and the side surface of the subframe 210, the rigidity of the entire speaker unit is increased and the diaphragm 100 is supported. The rigidity can be kept low.
Further, since the cover frame 500 having an elastic modulus larger than the elastic modulus of the subframe 210 covers the surface and side surfaces excluding the frame opening O of the subframe 210, the rigidity of the entire speaker unit is increased, and the diaphragm 100 is increased. The rigidity of the structure that supports can be kept low.
The voice coil actuator 400 includes a voice coil bobbin 410, a voice coil 420, a yoke 430, a magnet 440, a pole piece 450, and an auxiliary magnet 460. Therefore, the inclination of the diaphragm 100 can be suppressed.
　本発明は以上に述べた実施形態に限られるものではなく、発明の要旨を逸脱しない範囲で各種の変更が可能である。
　ボイスコイル式アクチエータの構造を説明したが、これに限定されない。
　また、振動板１００の形状を４つの直線と４つの屈曲線が交互に繋がった輪郭をもつものであるとして説明したが、これに限定されない、例えば、振動板１００の形状を３つ、または５つ以上の直線と３つまたは５つ以上の屈曲線が交互に繋がった輪郭をもつものとしてもよい。 The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
Although the structure of the voice coil actuator has been described, the structure is not limited to this.
Moreover, although the shape of the diaphragm 100 has been described as having an outline in which four straight lines and four bent lines are alternately connected, the present invention is not limited to this. For example, the shape of the diaphragm 100 is three or five. It is good also as a thing with the outline which 3 or more or 5 or more bending lines were connected alternately.
特開２００４－１７９８５５号JP 2004-179855 A
　　　Ｏ　フレーム開口部
　　　Ｌ　直線
　　　Ｑ　屈曲線
　１００　振動板
　１０１　振動板表板
　１０２　振動板本体
　１０３　振動板裏板
　２００　フレーム
　２１０　サブフレーム
　２２０　メインフレーム
　３００　エッジ
　３０１　エッジ外周部
　３０２　エッジ湾曲部
　３０３　エッジ内周部
　３１０　表側エッジ
　３２０　裏側エッジ
　４００　ボイスコイル式アクチエータ
　４１０　ボイスコイルボビン
　４２０　ボイスコイル
　４３０　ヨーク
　４４０　マグネット
　４５０　ポールピース
　４６０　補助マグネット
　５００　カバーフレーム O Frame opening L Straight line Q Bending line 100 Diaphragm 101 Diaphragm front plate 102 Diaphragm body 103 Diaphragm back plate 200 Frame 210 Subframe 220 Main frame 300 Edge 301 Edge outer periphery 302 Edge curved portion 303 Edge inner periphery 310 Front side edge 320 Back side edge 400 Voice coil actuator 410 Voice coil bobbin 420 Voice coil 430 Yoke 440 Magnet 450 Pole piece 460 Auxiliary magnet 500 Cover frame

Claims (7)

  1. 　平面型スピーカユニットであって、
    複数の直線と複数の屈曲線とが交互に繋がってできた輪郭を形成する外周部である振動板外周部を持ち表面が平面になった部材である振動板と、
    複数の直線と複数の屈曲線とが交互に繋がった輪郭を形成する内周部であるフレーム内周部でできた開口部であるフレーム開口部を設けられるフレームと、
    外周部であるエッジ外周部と内周部であるエッジ内周部とをもつ環状の弾性部材であって該エッジ外周部を前記フレーム内周部に固着され該エッジ内周部を前記振動板外周部に固着されるエッジと、
    前記フレームに支持され前記振動板を面外振動する様に駆動するボイスコイル式アクチエータと、
    を備え、
    屈曲線が折線または曲線のうちの一方またはそれらの組み合わされた線であり、
    前記振動板外周部と前記フレーム内周部とが接触しない様に前記振動板が前記フレーム開口部に嵌まり、
    前記振動板外周部の屈曲線と前記フレーム内周部の屈曲線との１対の端部に挟まれた端部を除く箇所の隙間が前記振動板外周部の直線と前記フレーム内周部の直線との隙間より広い、
    ことを特徴とする平面型スピーカユニット。     A flat speaker unit,
    A diaphragm which is a member having a diaphragm outer peripheral part which is an outer peripheral part forming an outline formed by alternately connecting a plurality of straight lines and a plurality of bending lines, and a surface thereof,
    A frame provided with a frame opening which is an opening made of a frame inner peripheral portion which is an inner peripheral portion forming an outline in which a plurality of straight lines and a plurality of bent lines are alternately connected;
    An annular elastic member having an outer periphery of an edge that is an outer periphery and an inner periphery of an edge that is an inner periphery, the outer periphery of the edge being fixed to the inner periphery of the frame, and the inner periphery of the edge being the outer periphery of the diaphragm An edge fixed to the part,
    A voice coil actuator that is supported by the frame and drives the diaphragm to vibrate out of plane;
    With
    The bend line is one of a fold line or a curve or a combination thereof;
    The diaphragm fits into the frame opening so that the outer periphery of the diaphragm and the inner periphery of the frame do not contact each other,
    A gap between the bent portion of the diaphragm outer peripheral portion and a bent line of the frame inner peripheral portion excluding the ends sandwiched between the pair of end portions is a straight line between the diaphragm outer peripheral portion and the frame inner peripheral portion. Wider than the gap with the straight line,
    A planar speaker unit characterized by the above.
  2. 前記振動板外周部の直線と前記フレーム内周部の直線との隙間が一定の幅寸法をもち、
    前記振動板外周部の屈曲線と前記フレーム内周部の屈曲線との隙間が屈曲線の１対の端部から中間部に移動するにつれて大きくなる様に変化する幅寸法をもつ、
    ことを特徴とする請求項１に記載の平面型スピーカユニット。     The gap between the straight line of the outer peripheral part of the diaphragm and the straight line of the inner peripheral part of the frame has a constant width dimension,
    A width dimension that changes so that a gap between the bending line of the outer peripheral part of the diaphragm and the bending line of the inner peripheral part of the frame moves from a pair of ends of the bending line to an intermediate part;
    The flat speaker unit according to claim 1.
  3. 屈曲線が一定の曲率半径をもつ曲線であり、
    前記フレーム内周部の屈曲線が前記フレーム内周部の直線に滑らかに繋がり、
    前記振動板外周部の屈曲線が前記振動板外周部の直線に滑らかに繋がり、
    前記振動板外周部の屈曲線の曲率中心が前記フレーム内周部の屈曲線の曲率中心より内側に位置する、
    ことを特徴とする請求項２に記載の平面型スピーカユニット。     The bend line is a curve with a certain radius of curvature,
    The bent line of the inner periphery of the frame is smoothly connected to the straight line of the inner periphery of the frame,
    The bending line of the outer periphery of the diaphragm is smoothly connected to the straight line of the outer periphery of the diaphragm,
    The center of curvature of the bending line of the outer peripheral part of the diaphragm is located inside the center of curvature of the bending line of the inner peripheral part of the frame;
    The flat speaker unit according to claim 2.
  4. 前記フレームが前記フレーム開口部を設けられるサブフレームと該サブフレームを固定し前記ボイスコイル式アクチエータを支持するメインフレームとを有し、
    前記サブフレームが板状部材であって、
    前記エッジが該エッジ外周部を前記フレーム内周部の表面に固着され該エッジ内周部を前記振動板外周部の表面に固着される表側エッジと該エッジ外周部を前記フレーム内周部の裏面に固着され該エッジ内周部を前記振動板外周部の裏面に固着される裏側エッジとを有し、
    前記表側エッジと前記裏側エッジとが前記メインフレームに固着しない様に前記サブフレームがメインフレームに固定される、
    ことを特徴とする請求項３に記載の平面型スピーカユニット。     The frame includes a subframe in which the frame opening is provided, and a main frame that fixes the subframe and supports the voice coil actuator;
    The subframe is a plate-shaped member,
    The edge is fixed to the surface of the inner periphery of the frame, and the edge is fixed to the surface of the outer periphery of the diaphragm, and the outer periphery of the edge is the back surface of the inner periphery of the frame. A back side edge fixed to the back surface of the diaphragm outer peripheral part, the edge inner peripheral part fixed to
    The subframe is fixed to the main frame so that the front side edge and the back side edge are not fixed to the main frame.
    The flat speaker unit according to claim 3.
  5. 前記サブフレームの外周部と前記サブフレームの側面とを覆うカバーフレームと、
    を備え、
    前記サブフレームの弾性率が前記カバーフレームの弾性率より小さい、
    ことを特徴とする請求項４に記載の平面型スピーカユニット。     A cover frame that covers an outer peripheral portion of the subframe and a side surface of the subframe;
    With
    The elastic modulus of the subframe is smaller than the elastic modulus of the cover frame;
    The flat speaker unit according to claim 4, wherein:
  6. 前記フレームが前記フレーム開口部を設けられるサブフレームと該サブフレームを固定し前記ボイスコイル式アクチエータを支持するメインフレームとを有し、
    前記サブフレームが板状部材であって、
    前記エッジが該エッジ外周部を前記フレーム内周部の表面に固着され該エッジ内周部を前記振動板外周部の表面に固着される表側エッジと該エッジ外周部を前記フレーム内周部の裏面に固着され該エッジ内周部を前記振動板外周部の裏面に固着される裏側エッジとを有し、
    前記表側エッジと前記裏側エッジとが前記メインフレームに固着しない様に前記サブフレームがメインフレームに固定される、
    ことを特徴とする請求項１に記載の平面型スピーカユニット。     The frame includes a subframe in which the frame opening is provided, and a main frame that fixes the subframe and supports the voice coil actuator;
    The subframe is a plate-shaped member,
    The edge is fixed to the surface of the inner periphery of the frame, and the edge is fixed to the surface of the outer periphery of the diaphragm, and the outer periphery of the edge is the back surface of the inner periphery of the frame. A back side edge fixed to the back surface of the diaphragm outer peripheral part, the edge inner peripheral part fixed to
    The subframe is fixed to the main frame so that the front side edge and the back side edge are not fixed to the main frame.
    The flat speaker unit according to claim 1.
  7. 前記サブフレームの外周部と前記サブフレームの側面とを覆うカバーフレームと、
    を備え、
    前記サブフレームの弾性率が前記カバーフレームの弾性率より小さい、
    ことを特徴とする請求項６に記載の平面型スピーカユニット。     A cover frame that covers an outer peripheral portion of the subframe and a side surface of the subframe;
    With
    The elastic modulus of the subframe is smaller than the elastic modulus of the cover frame;
    The flat speaker unit according to claim 6.
PCT/JP2012/053224 2011-02-14 2012-02-13 Flat-type speaker unit WO2012111588A1 (en)

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