WO2012111588A1 - Unité formant haut-parleur de type plat - Google Patents

Unité formant haut-parleur de type plat 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
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Application number
PCT/JP2012/053224
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English (en)
Japanese (ja)
Inventor
金谷仁史
Original Assignee
株式会社ティーイーアイ
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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/fr

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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

La présente invention tente de résoudre le problème qui consiste à prévoir une unité formant haut-parleur de type plat à émission acoustique, d'une stabilité spécifique et doté d'une structure simplifiée et d'une puissance élevée. Contrairement aux unités classiques formant haut-parleur du type plat, la présente unité formant haut-parleur du type plat comprend les éléments suivants : une plaque vibrante ayant une section périphérique externe qui forme un contour à partir d'une pluralité de lignes droites et d'une pluralité de lignes courbes se rejoignant de manière alternée; un cadre dans lequel est disposée une ouverture formée par une section périphérique interne formant un contour de la pluralité de lignes droites et de la pluralité de lignes courbes se rejoignant de manière alternée; un bord qui se présente sous la forme d'un élément élastique annulaire doté d'une section périphérique externe et d'une section périphérique interne et est fixé à la section périphérique interne du cadre et à la section périphérique externe de la plaque vibrante; et un actionneur vocal de type bobine. La plaque vibrante s'insère dans l'ouverture du cadre de sorte que la section périphérique externe de la plaque vibrante et la section périphérique interne du cadre ne se touchent pas. L'espace qui se trouve entre les deux sections d'extrémité des lignes courbes de la section périphérique externe de la plaque vibrante et des lignes courbes de la section périphérique interne du cadre est formé de manière à être plus grand que l'espace entre les lignes droites de la section périphérique externe de la plaque vibrante et les lignes droites de la section périphérique interne du cadre.
PCT/JP2012/053224 2011-02-14 2012-02-13 Unité formant haut-parleur de type plat WO2012111588A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-029215 2011-02-14
JP2011029215A JP5702181B2 (ja) 2011-02-14 2011-02-14 平面型スピーカユニット

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WO2012111588A1 true WO2012111588A1 (fr) 2012-08-23

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PCT/JP2012/053224 WO2012111588A1 (fr) 2011-02-14 2012-02-13 Unité formant haut-parleur de type plat

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KR101584651B1 (ko) 2013-09-13 2016-01-12 주식회사 진영지앤티 슬림형 스피커 및 그의 제조 방법
KR101609708B1 (ko) * 2015-01-15 2016-04-20 주식회사 엠소닉 양면형 엣지를 구비한 스피커
KR102346606B1 (ko) * 2020-12-29 2022-01-03 범진시엔엘 주식회사 다이나믹 스피커

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