WO2011142030A1 - Haut-parleur de type plan - Google Patents

Haut-parleur de type plan Download PDF

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Publication number
WO2011142030A1
WO2011142030A1 PCT/JP2010/058195 JP2010058195W WO2011142030A1 WO 2011142030 A1 WO2011142030 A1 WO 2011142030A1 JP 2010058195 W JP2010058195 W JP 2010058195W WO 2011142030 A1 WO2011142030 A1 WO 2011142030A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
speaker
magnet
planar
magnets
Prior art date
Application number
PCT/JP2010/058195
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English (en)
Japanese (ja)
Inventor
玉井哲
Original Assignee
インターファクト有限会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by インターファクト有限会社 filed Critical インターファクト有限会社
Priority to PCT/JP2010/058195 priority Critical patent/WO2011142030A1/fr
Publication of WO2011142030A1 publication Critical patent/WO2011142030A1/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • 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

Definitions

  • the present invention relates to a flat speaker, and more specifically to a gummazone flat speaker.
  • a cone type is often used as a speaker unit.
  • the vibration generated in the voice coil is propagated in the order of voice coil ⁇ adhesive ⁇ bobbin ⁇ diaphragm inner periphery ⁇ diaphragm outer periphery. Therefore, the acoustic vibration generated in the voice coil may be gradually distorted in these propagation processes. Also, the higher the frequency, the less likely the vibration will propagate.
  • the drive unit and the diaphragm are separated, so it is necessary to propagate the acoustic vibration generated in the drive unit to the diaphragm. For this reason, the same problem exists.
  • a speaker in which a drive unit and a diaphragm are integrated has been proposed.
  • One such speaker is the Gamuzon speaker.
  • a gummazone speaker has a structure in which a conductive material is formed on a film base material. Since the drive unit and the diaphragm are integrated with each other, the gummazone speaker has a structure in which divided vibration and natural vibration are less likely to occur compared to a cone type speaker or the like.
  • Patent No. 3159714 Plant type acoustic transducer
  • WO99 / 03304 international publication date: January 21, 1999 Japanese Patent Laid-Open No. 2007-201974 “Speaker of an annular circuit” (release date: August 9, 2007)
  • the invention described in Patent Document 1 is a small piece magnet as shown in FIGS. 8 and 11 of Japanese Patent No. 3159714
  • a large number of conductive circuit groups (cells) formed in the periphery thereof are formed, and these groups individually vibrate independently.
  • the relationship between the magnet and the conductor pattern (coil) formed on the diaphragm is a united configuration in which the whole is not a cell unit but a single unit. Furthermore, the magnetic flux generated between a plurality of rod-shaped magnets positioned along the longitudinal direction of the elliptical diaphragm is used to the maximum extent so that the strongest magnetic flux can be used, and according to the lateral direction of the diaphragm. The positioned bar-shaped magnet is shortened to suppress the generation of magnetic flux. Furthermore, the vibration phenomenon of the diaphragm is dispersed and suppressed by forming the diaphragm in an elliptical arc shape.
  • Patent Document 2 The invention described in Patent Document 2 is formed on a vibration film and a plurality of rectangular frame-shaped magnets (see FIG. 3 of Patent Document 2) which are arranged in an annular shape on a yoke and sequentially increase in size.
  • the shape of the flat speaker includes a spiral annular circuit (see FIG. 4) formed in a square shape. Patent Document 2 will be discussed later in connection with FIGS. 7A and 7B.
  • Patent Documents 1 and 2 have the advantages and advantages of the Gamson speaker compared to the cone type, dome type and horn type. However, as a result of intensive studies on these speakers, the present inventors have found that there is room for improvement in several points.
  • an object of the present invention is to provide a novel flat speaker.
  • the planar speaker according to the present invention includes a diaphragm formed in a generally elliptical shape that is long in the lateral direction (X direction) of the planar speaker when the planar speaker is installed horizontally. , Provided with a plurality of magnets extending in the lateral direction (X direction) close to the diaphragm, wherein the plurality of magnets have N-pole bar magnets and S-pole bar magnets alternately arranged substantially in parallel.
  • the conductor pattern formed on the diaphragm is a coil-shaped conductor pattern formed in a spiral shape
  • a pattern bundle extending a plurality of times between the adjacent bar-shaped magmets, and an acoustic current flows in the same lateral direction (+ X direction or -X direction) in each pattern bundle, and the plurality of magnets Occur Wherein for driving the vibrating plate by interaction with the acoustic current of the longitudinal direction (+ Y direction or -Y direction) transverse (+ X direction or -X direction) flowing in the magnetic flux and the pattern beams of.
  • the diaphragm has the conductor pattern formed on substantially the entire surface thereof, and is close to one of the conductor pattern bundle along the depth direction ( ⁇ Z direction) of the planar speaker.
  • An S pole bar magnet may be arranged on the other side of the N pole bar magnet on the other side.
  • the diaphragm may be formed of a flexible printed board.
  • the diaphragm may be formed of a flexible printed board having two layers of a conductor layer based on a liquid crystal polymer.
  • the flat speaker may be a horizontally long small flat speaker when placed horizontally.
  • the magnet may be a neodymium magnet.
  • the bar magnet may be formed by connecting a plurality of magnet pieces.
  • the elliptical diaphragm is supported by a rubber edge at the periphery thereof, and the rubber edge is an elastic body having a relatively thin shape and a corrugated cross section, so that the stiffness of the support system is kept low. It may be.
  • the magnet is fixed to a bottom portion of a generally bowl-shaped frame, and the frame receives a magnetic flux other than a useful magnetic flux acting on the diaphragm among the magnetic flux generated from the magnet. It may function as a guiding yoke.
  • the magnet may be fixed to a bottom portion of a generally bowl-shaped frame, and the frame may be formed from a synthetic resin.
  • the planar speaker comprises a housing formed with a punching grill on the front surface of the planar speaker, a spacer on the side surface, and a generally bowl-shaped frame on the back surface, and a plurality of openings are formed in the punching grill and the frame. May be formed so that locally uneven internal pressure in the housing is not applied to the diaphragm.
  • a novel flat speaker can be provided.
  • FIG. 1 is an exploded perspective view in which each element of the planar speaker according to the present embodiment is separately displayed.
  • FIG. 2 is an exploded perspective view showing a built-in relationship between some elements of the planar speaker shown in FIG.
  • FIG. 3 is a diagram showing the diaphragm of the planar speaker shown in FIG. 1, and here, the patterns on the front surface and the back surface are shown in detail.
  • FIG. 4 is a diagram for explaining an arrangement state of magnets of the planar speaker shown in FIG.
  • FIG. 5A is an exploded perspective view taken along the line IV-IV ′ of FIG. However, FIG. 5A shows all the elements shown in FIG.
  • FIG. 5B is a diagram illustrating the relationship between the diaphragm and the magnet illustrated in FIG. 5A.
  • FIG. 6A is an exploded perspective view seen from the VV ′ cut surface of FIG. However, FIG. 6A shows all the elements shown in FIG.
  • FIG. 6B is a diagram illustrating the relationship between the diaphragm and the magnet illustrated in FIG. 6A.
  • FIG. 7A is a transcription of FIG. 3 of JP 2007-201974. However, an axis defining the XYZ direction is additionally written.
  • FIG. 7B is a diagram obtained by transcribing FIG. 4 of Japanese Patent Application Laid-Open No. 2007-201974. However, an axis defining the XYZ direction is additionally written.
  • FIG. 1 is an exploded perspective view in which each element of the planar speaker body according to the present embodiment is separately displayed.
  • the external size of the flat speaker 1 shown in FIG. 1 is, for example, a relatively small speaker of about 153 mm width ⁇ about 40 mm height ⁇ about 8.5 mm thickness (depth) when installed horizontally during use.
  • the flat speaker 1 includes a punching grill 2, a damper B 4, a spacer 6, a rubber edge 8, a diaphragm 10, a damper A 12, a magnet 14, a frame 16, and a terminal 18. These elements other than the terminal 18 are screwed and fixed by screws 20 passed from the punching grill 2 through screw holes formed at the four corners of each element.
  • the width direction is the X direction and the vertical direction (height direction) is the Y direction.
  • the thickness direction (depth direction) will be referred to as the Z direction. The sound emitted from the speaker 1 spreads and proceeds in the + Z direction.
  • the speaker 1 generally has a thin rectangular parallelepiped outer shape.
  • the front surface front surface
  • the side wall 4 surface is formed by the spacer 6
  • the rear surface back surface
  • the punching grill 2 is made of, for example, the material aluminum.
  • the punching grill 2 has a plurality of hexagonal grills (openings) 2p formed by a punching method on the front surface so that the sound can be efficiently transmitted forward (+ Z direction). For this reason, it is also called “honeycomb grill”.
  • the punching grill 2 forms a plurality of grills 2p to circulate with the outside air inside the housing, and as a cover for the damper B4, suppresses it against extreme vibration exceeding the input resistance, A locally non-uniform internal pressure is prevented from being applied to the diaphragm 10. It also protects the diaphragm and damper B4.
  • Damper-B4 is a sheet-like sound absorbing material.
  • the damper B4 is made of, for example, ester wool and is made of 100% polyester. It is light and soft, and it absorbs sound efficiently with a material containing a lot of air layers. Ester wool is thin and easy to process, and is mainly used for filling and sound absorbing materials for speaker boxes. Furthermore, the damper B4 also has a function of protecting the punching grill 2 from coming into direct contact when the diaphragm 10 vibrates.
  • the spacer 6 has a generally rectangular frame shape that is open in the vertical direction ( ⁇ Z direction), and is made of, for example, a material ABS.
  • the rubber edge 8 is a relatively thin, generally elliptical frame-shaped elastic body, and is formed of, for example, the material nitrile rubber (NBR) or urethane foam (P.U. Foam).
  • NBR nitrile rubber
  • P.U. Foam urethane foam
  • the cross-sectional shape of the rubber edge 8 is preferably formed in a wave shape.
  • the diaphragm 10 is typically formed of a flexible printed circuit board. Also called “diaphragm”.
  • the printed circuit board 10 will be described later in detail with reference to FIGS. 3, 5B and 6B.
  • Damper-A12 is the same as damper-B4.
  • the magnet 14 is composed of a plurality of rod-shaped permanent magnets.
  • the magnet 14 is preferably formed from a neodymium magnet (also referred to as “neodymium magnet”) having a high magnetic flux density.
  • the neodymium magnet is preferably nickel-plated on the surface to increase rust prevention and strength. The magnet 14 will be described later in detail with reference to FIGS. 4, 5B and 6B.
  • the frame 16 has a generally rectangular bowl shape with the upper direction (+ Z direction) open, and is formed of, for example, SPCC (ordinary steel JIS ⁇ G3141 or the like) suitable for material drawing.
  • the frame 16 is also called “yoke”.
  • the frame 16 forms a plurality of elongated grooves (openings) 18p and circulates the inside of the housing with the outside air, so that heat radiation and locally uneven internal pressure of the housing are not applied to the diaphragm 10. .
  • the frame 16 may be formed of a synthetic resin.
  • the frame 16 is formed of synthetic resin, the weight of the speaker 1 can be reduced.
  • the frame 16 does not have a function as a yoke. Whether or not the frame 16 has the yoke function is determined after the speaker 1 in both cases is completed and the acoustic characteristics thereof are measured and compared.
  • the essential elements for the speaker 1 to emit sound are the diaphragm 10 and the magnet 14.
  • FIG. 2 is an exploded perspective view showing a built-in relationship between some elements of the planar speaker shown in FIG.
  • the damper B4 is accommodated in the internal space formed by the spacer 6, and further, an amplitude space during vibration of the diaphragm 10 is secured.
  • the diaphragm 10 has a peripheral end fixed to and supported by the frame-shaped rubber edge 8 using, for example, an adhesive.
  • the stiffness of the support system is kept low by supporting the diaphragm 10 with an elastic rubber edge 8 having a relatively thin cross section and a corrugated cross section. For this reason, the diaphragm 10 can vibrate smoothly in response to an acoustic signal.
  • the damper A12 is housed in a recessed space formed in the frame 16. Further, this concave space secures an amplitude space when the diaphragm 10 vibrates.
  • the bottom portion of the frame 16 has a plurality of elongated grooves 18p arranged in parallel to a plurality of rows.
  • the magnets 14 are respectively fixed to the bottom portion of the frame 16 using, for example, an adhesive.
  • the frame 16 functions as a yoke for inducing a magnetic flux other than a useful magnetic flux acting on the diaphragm 10 among the magnetic fluxes from the N pole to the S pole of the magnet 14.
  • the terminal 18 is crimped to the bottom of the frame 16 with a eyelet fitting. Terminal portions 18 in and 18 out of the terminal 18 are electrically connected to the input land 9F in (9B in ) and the output land 9F out (9B out ) of the conductor pattern of the printed circuit board which is the diaphragm 10 (FIG. 3).
  • This relatively small speaker 1 may be used alone as a final product.
  • the speaker 1 may be used by being housed in an acoustically optimal speaker box, speaker cabinet or the like.
  • the speaker 1 can be used for other radios, car radios, MDs, CDs, DVDs, stereo sets and other audio equipment, flat television sets, video / audio equipment (AV equipment) such as home theaters, or personal computers. You may incorporate and use.
  • FIG. 3 is a diagram for explaining the conductor pattern 9 of the diaphragm 10 of the flat speaker shown in FIG.
  • the front surface side conductor pattern 9F is 10F (front surface)
  • the back surface side conductor pattern 9B seen through from the front surface side is 10B (back surface).
  • the diaphragm 10 is typically formed of a flexible printed circuit board.
  • the printed circuit board 10 has a generally oval outer shape.
  • the front and back conductor patterns 9F and 9B are electrically connected by a through hole (PTH: plated through hole) formed at a position 9p. That is, this printed circuit board 10 is a printed circuit board having two conductor layers.
  • PTH plated through hole
  • the feature of the diaphragm 10 according to the present embodiment is that the outer shape is generally elliptical.
  • the present inventors have conventionally experienced that when the sound of a speaker is set to a high output, the end portion of the diaphragm tends to induce abnormal vibration (flapping).
  • the end of the aircraft was formed into an elliptical shape in order to aerodynamically suppress abnormal vibration at the main wing end of the aircraft (especially propeller aircraft). I found out.
  • the tips of the blades of birds, insects, etc. in flight are all curved.
  • An input land 9F in and an output land 9F out are formed at the lower end ( ⁇ X direction end) of the surface-side conductor pattern 10F.
  • Input lands 9B in the output lands 9B out the lower end of the back side conductor pattern 10B (-X direction end portion) is formed.
  • input land 9F in the input land 9B in is, are electrically connected by the through-hole.
  • the output land 9F out and the output land 9B out are electrically connected by a through hole.
  • Input lands 9F in is electrically connected to the surface conductor pattern 10F.
  • the output land 9F out is electrically connected to the back side conductor pattern 10B.
  • a plurality of very small through holes (for example, five 0.2 mm diameter PTHs) are formed at the position 9p, and the conductor patterns on both the front and back surfaces are electrically connected.
  • the front surface side conductor pattern 9F starting from the input land 9F in (9B in ) advances like a single stroke on the printed circuit board surface (10F) side (that is, forms a coil), and the back surface at the position 9p.
  • the process proceeds to the side conductor pattern 9B, proceeds on the printed circuit board back surface (9B) side like a single stroke (that is, forms a coil), and ends with the output land 9B out (9F out ).
  • the pattern bundles 9F 6 and 9F 1 are sequentially circulated from the outside to the inside and reversed to form the pattern bundle.
  • 9F 2 and 9F 5 are circulated from the outside to the inside in the reverse direction, and reversed again to circulate the pattern bundles 9F 4 and 9F 3 from the outside to the inside.
  • the back side conductor pattern 9B is moved, and the pattern bundles 9B 4 and 9B 3 are sequentially rotated from the inside to the outside and reversed, and the pattern bundles 9B 2 and 9B 4 are rotated in the reverse direction from the inside to the outside and then reversed again.
  • the pattern bundles 9B 6 and 9B 1 are sequentially circulated from the inside to the outside.
  • the pattern bundles (9F 6 and 9F 1 ), (9F 2 and 9F 5 ), (9F 4 and 9F 3 ), (9B 4 and 9B 3 ), (9B 2 and 9B 4 ) and (9B 6 And 9B 1 ) are each formed to be generally elliptical.
  • an acoustic signal flows from the input land 9F in (9B in ) toward the output land 9B out (9F out ).
  • the alternating current from the input land 9F in (9B in ) causes the pattern bundles 9F 6 and 9F 1 of the surface side conductor pattern 10F to circulate twice in a counterclockwise direction from the outer periphery to the inner side.
  • the pattern bundles 9F 2 and 9F 5 are reversed at the end in the X direction, and the pattern bundles 9F 2 and 9F 5 are wound five times in a clockwise direction from the outer periphery to the inside.
  • the pattern bundles 9F 4 and 9F 3 are reversed five times in the counterclockwise direction from the outer periphery to the inner side by inverting at the end portion in the X direction.
  • the process advances to the surface side conductor pattern 10F via the through hole at the position 9p, and the pattern bundles 9B 4 and 9B 3 are spirally wound five times in the counterclockwise direction from the inner periphery to the outer periphery.
  • the pattern bundles 9B 2 and 9B 5 are reversed five times in the clockwise direction from the inner circumference to the outer circumference in the reverse direction at the end in the X direction.
  • the pattern bundles 9B 6 and 9B 1 are reversed twice at the end in the X direction in a counterclockwise spiral from the inner periphery to the outer periphery.
  • the alternating current flows out from the output land 9B out (9F out ).
  • the feature of the diaphragm 10 according to the present embodiment is that a conductor pattern (coil) is formed over the entire surface of the diaphragm. Therefore, as will be described later, when the conductor pattern is driven with a force f by a magnetic field, the entire diaphragm vibrates uniformly.
  • the traveling direction of the conductor pattern of the diaphragm 10 is formed in an oval shape as a whole, that is, the Y direction component is extremely small with only the X direction component.
  • the traveling direction is along an elliptical end.
  • Such a printed circuit board 10 can be manufactured by using, for example, a subtractive method that is a typical method for manufacturing a printed circuit board. Specifically, although not shown, through holes are drilled on a double-sided copper-clad liquid crystal polymer substrate in which a copper foil with a thickness of about 18 microns for a flexible printed circuit board is stretched on both sides. Copper plating (electroless copper plating) and electrolytic plating are performed with a thickness of about 18 microns. Then, using an lithographic method, an etching resist is laminated on both front and back surfaces, a mask corresponding to the shape of the conductor patterns 9F and 9B is baked and developed, and then the etching resist is peeled off. Finally, a solder resist or a coating is applied to the conductor patterns 9F and 9B. Thereafter, the outer shape is processed and completed. However, of course, the printed circuit board 10 may be manufactured by other methods.
  • FIG. 4 is a diagram for explaining an arrangement state of the magnets 14 of the planar speaker shown in FIG.
  • the magnet 14 is formed of a plurality of rod-shaped magnet pieces so that processability and desired arrangement can be easily realized.
  • the magnet piece is composed of eight relatively short magnet pieces arranged at both ends and 15 relatively long magnet pieces arranged in the center.
  • the relatively short magnet pieces are about 6 mm in length, about 3 mm in width, and about 2.5 mm in thickness. Half of them have N pole magnetism and the other half of them have S pole magnetism.
  • the relatively long magnet pieces are about 35 mm in length, about 3 mm in width, and about 2.5 mm in thickness, with 6 pieces having N pole magnetism and 9 pieces having S pole magnetism.
  • the magnet 14 is arranged in such a manner that three relatively long magnet pieces are continuously arranged in the lateral direction (X direction) in the central portion. These are arranged in four rows, each parallel. At both ends of the first, second, fourth, and fifth rows of magnets, relatively short magnet pieces are respectively arranged in a lateral direction. These relatively short magnet pieces are positioned at a slight angle so as to converge at the central portion in accordance with both ends of the wiring shape of the generally elliptical diaphragm 10.
  • the first row is composed of magnet pieces 14 12 , 14 13 , 14 14 having relatively long S poles. Magnet pieces 14 11 and 14 15 having relatively short S poles are disposed at both ends.
  • the second row consists of relatively long magnet pieces 14 22 , 14 23 , 14 24 with N poles. At both ends, relatively small magnet pieces 14 21 and 14 25 having N poles are arranged.
  • the third column the center line (not shown.) Along, consisting of S relatively long magnet pieces poles 14 32, 14 33, 14 34. Magnet pieces 14 31 and 14 35 having relatively short S poles are disposed at both ends.
  • the fourth column consists of relatively long magnet pieces 14 42 , 14 43 , and 14 44 with N poles.
  • relatively small N-pole magnet pieces 14 41 and 14 45 are arranged, respectively.
  • the fifth row consists of relatively long magnet pieces 14 52 , 14 53 , 14 54 with south poles. Magnet pieces 14 51 and 14 55 having relatively short S poles are arranged at both ends.
  • the feature of the magnet of the present embodiment is that the magnet 14 is disposed on the bottom front surface of the frame 16 in accordance with the conductor pattern formed on the front surface of the diaphragm. Furthermore, all of the five rows of rod-like permanent magnets are arranged substantially along the width direction (X direction). There are no magnet pieces arranged along the height direction (Y direction). The magnetic flux emitted from the N-pole bar-shaped magnet goes to the adjacent S-pole bar-shaped magnet located along the parallel. Therefore, the direction of the magnetic flux formed by the magnets 14 arranged as shown in FIG. 4 is almost in the width direction ( ⁇ Y direction).
  • the conductor pattern bundles 9F 1 and 9B 1 are positioned along the outside of the magnet 14 1m in the first row when viewed in the thickness direction (Z direction).
  • the conductor pattern bundles 9F 2 and 9B 2 are located along the gaps between the magnets 14 1m and 14 2m in the first and second rows.
  • the conductor pattern bundles 9F 3 and 9B 3 are located along the gaps between the magnets 14 2m and 14 3m in the second to third rows.
  • the conductor pattern bundles 9F 4 and 9B 4 are positioned along the gap between the magnets 14 3m to 14 4m in the third to fourth rows.
  • the conductor pattern bundles 9F 5 and 9B 5 are positioned along the gaps between the magnets 14 4m to 14 5m in the fourth to fifth rows.
  • the conductor pattern bundles 9F 6 and 9B 6 are located along the outside of the magnet 14 5m in the fifth row.
  • the acoustic current always flows in the same direction through 9F 1 (9B 1 ), 9F 3 (9B 3 ), 9F 5 (PB 5 ), and 9F 2 (9B 2 ), 9F 4 (9B 4 ). ), 9F 6 (PB 6 ) flows in the opposite direction.
  • FIG. 5A is an exploded perspective view taken along the line IV-IV ′ of FIG. However, FIG. 5A shows all the elements shown in FIG. As described with reference to FIG. 1, the flat speaker 1 includes a punching grill 2, a damper B4, a spacer 6, a rubber edge 8, a diaphragm 10, a damper A12, a magnet 14, and a frame. 16.
  • FIG. 5B is a diagram for explaining the relationship between the diaphragm 10 and the magnet 14 shown in FIG. 5A.
  • the gap between the diaphragm 10 and the magnet 14 is enlarged and drawn widely. However, at the stage of screwing and assembling, this gap is very narrow and is about 1.5 mm in this embodiment.
  • the conductor patterns 9F and 9B formed on the front and back surfaces of the printed circuit board run in the width direction (X direction).
  • the acoustic signal (alternating current) flows through these conductor patterns 9F and 9B instantaneously in the + X direction or the ⁇ X direction, and at the next moment, the flowing direction is simultaneously reversed in the reverse direction.
  • the magnet 14 installed in the frame 16 always generates a magnetic flux in a direction perpendicular to the paper surface ( ⁇ Z direction) as described with reference to FIG.
  • a certain moment is described as an example.
  • a magnetic flux ⁇ in the + Y direction is generated between the third row magnet 14 3M and the fourth row magnet 14 4M .
  • the currents i F4 and i B4 flow in the conductor patterns 9F 4 and 9B 4 in the + X direction.
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 4 and 9B 4 , that is, the diaphragm 10.
  • a magnetic flux ⁇ in the + Y direction is generated between the magnet 14 1M in the first row and the magnet 14 3M in the second row.
  • the currents i F2 and i B2 flow in the + X direction through the conductor patterns 9F 2 and 9B 2 .
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 2 and 9B 2 , that is, the diaphragm 10.
  • a magnetic flux ⁇ in the ⁇ Y direction is generated between the second row magnet 14 2M and the third row magnet 14 3M .
  • Currents i F3 and i B3 flow in the ⁇ X direction through the conductor patterns 9F 3 and 9B 3 .
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 3 and 9B 3 , that is, the diaphragm 10.
  • a ⁇ Y direction magnetic flux ⁇ is generated between the fourth row magnet 14 4M and the fifth row magnet 14 5M .
  • Currents i F5 and i B5 flow through the conductor patterns 9F 5 and 9B 5 in the ⁇ X direction.
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 5 and 9B 5 , that is, the diaphragm 10. That is, a force f that drives the diaphragm 10 in the ⁇ Z direction as a whole is generated.
  • the direction of the current i is reversed while the direction of the magnetic flux ⁇ remains unchanged.
  • the force f for driving the diaphragm 10 in the + Z direction as a whole stops. In this way, the diaphragm 10 vibrates in response to the magnitude and direction of the acoustic signal (alternating current).
  • FIG. 6A is an exploded perspective view seen from the VV ′ cut surface of FIG. However, FIG. 6A shows all the elements shown in FIG. As described with reference to FIG. 1, the flat speaker 1 includes a punching grill 2, a damper B4, a spacer 6, a rubber edge 8, a diaphragm 10, a damper A12, a magnet 14, and a frame. 16.
  • FIG. 6B is a diagram for explaining the relationship between the diaphragm and the magnet shown in FIG. 6A.
  • the content shown in FIG. 6B is technically the same as the content described in FIG. 5B.
  • the gap between the diaphragm 10 and the magnet 14 is enlarged and drawn widely for easy understanding.
  • the conductor patterns 9F and 9B formed on both the front and back surfaces of the printed circuit board run in the Z direction.
  • the acoustic signal (alternating current) flows through the adjacent conductor patterns 9F and 9B in the reverse direction (+ X direction or ⁇ X direction), and at the next moment, the flowing direction is simultaneously reversed in the reverse direction.
  • the magnet 14 installed in the frame 16 generates a magnetic flux in the ⁇ Y direction.
  • a certain moment is described as an example.
  • a magnetic flux ⁇ in the + Y direction is generated between the magnets 14 1M in the first row and the magnets 14 2M in the second row.
  • the currents iF 2 and iB 2 flow in the + X direction through the conductor patterns 9F 2 and 9B 2 .
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 2 and 9B 2 , that is, the diaphragm 10.
  • a magnetic flux ⁇ in the ⁇ Y direction is generated between the second row magnet 14 2M and the third row magnet 14 3M .
  • Currents i F3 and i B3 flow in the ⁇ X direction through the conductor patterns 9F 3 and 9B 3 .
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 3 and 9B 3 , that is, the diaphragm 10.
  • a magnetic flux ⁇ in the + Y direction is generated between the third row magnet 14 3M and the fourth row magnet 14 4M .
  • Currents i F4 and i B4 flow in the + X direction through the conductor patterns 9F 4 and 9B 4 .
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 4 and 9B 4 , that is, the diaphragm 10.
  • a ⁇ Y direction magnetic flux ⁇ is generated between the fourth row magnet 14 4M and the fifth row magnet 14 5M .
  • Currents i F5 and i B5 flow through the conductor patterns 9F 5 and 9B 5 in the ⁇ X direction.
  • a force f in the ⁇ Z direction is generated in the conductor patterns 9F 5 and 9B 5 , that is, the diaphragm 10. That is, a force f that drives the diaphragm 10 in the ⁇ Z direction as a whole is generated.
  • the direction of the current i is reversed while the direction of the magnetic flux ⁇ remains unchanged.
  • the force f for driving the diaphragm 10 in the + Z direction as a whole stops. In this way, the diaphragm 10 vibrates in response to the magnitude and direction of the acoustic signal (alternating current).
  • FIG. 7A is a transcription of FIG. 3 of JP 2007-201974. However, an axis defining the XYZ direction is additionally written.
  • FIG. 7B is a diagram obtained by transcribing FIG. 4 of JP2007-201974. However, an axis defining the XYZ direction is additionally written.
  • an S-pole magnet 1c, an N-pole magnet 1d, an S-pole magnet 1e, an N-pole magnet 1f, and an S-pole magnet 1g having a regular square frame shape with gradually increasing sizes are arranged concentrically. Yes.
  • Corresponding diaphragm 1i is formed with a regular square frame-shaped induction circuit 1h having a larger size.
  • the arrangement of the magnets 1c to 1g is point-symmetric with respect to the center point, and correspondingly, the traveling shape of the induction circuit 1h is also point-symmetric with respect to the center point. Both are preferably formed in a square shape. Therefore, it is more suitable for a square speaker than a speaker having a horizontally long front surface.
  • the length of the NS magnet adjacent to the peripheral portion is longer than that of the central portion.
  • the line bundle receiving this is also longer in the peripheral part than in the central part. Therefore, it is considered that a larger force f is generated in the diaphragm from the center to the periphery.
  • the magnetic flux ⁇ generated between the portions of the adjacent magnets extending in the X direction is in the ⁇ Y direction.
  • the magnetic flux ⁇ generated between the portions of adjacent magnets extending in the Y direction is in the ⁇ X direction. Therefore, in particular, at the four corners of the regular square, the magnetic flux in the X direction and the magnetic flux in the Y direction are mixed.
  • an induction circuit 1h extending in the X direction is formed between portions of adjacent magnets extending in the X direction.
  • an induction circuit 1h extending in the Y direction is formed between the portions of adjacent magnets extending in the Y direction.
  • the induction circuit 1h extending in the X direction is affected by magnetic fluxes in the X direction and the Y direction. Therefore, it is considered that a complicated force is generated on the diaphragm, particularly at the four corners of the regular square.
  • planar speaker according to the present embodiment has the following advantages, features, and effects.
  • the diaphragm is formed in an elliptical shape. Accordingly, it is possible to suppress abnormal vibration (flutter) at the end of the diaphragm when the sound is output at high power.
  • the diaphragm is formed of a flexible printed circuit board. Since a pattern is formed on almost the entire surface of the flexible printed circuit board and this pattern is directly driven, it is possible to reproduce a low-quality sound with good separation.
  • a conductor pattern (coil) is formed on the entire surface of the diaphragm. Furthermore, by using a printed circuit board having conductor patterns formed on both sides, a larger number of conductor patterns can be formed on the diaphragm. For this reason, almost the entire diaphragm can be used as a drive unit using a coil, and an ideal full-surface drive type flat speaker can be obtained. In the conventional gummazone speaker, the ratio of the coil portion to the diaphragm is limited. By adopting elliptic coils formed on substantially the entire surface of the diaphragm, the entire surface of the diaphragm can be driven in the same phase in the Gamson-type planar speaker according to the present embodiment, and the transient is achieved over a wide band. A speaker having good characteristics and phase characteristics can be realized.
  • the conductor pattern of the diaphragm is generally elliptical in appearance. Along with the elliptical shape of the diaphragm, it suppresses abnormal vibration (flutter) at the end of the diaphragm at high output.
  • a magnet is arranged on the entire bottom surface of the frame corresponding to the conductor pattern of the diaphragm. An efficient magnetic field is formed.
  • the arrangement of the magnets extends almost in the width direction ( ⁇ X direction) corresponding to the gap between the adjacent conductor patterns of the diaphragm.
  • ⁇ X direction width direction
  • S-pole magnets S-pole magnets
  • a short magnet is arranged corresponding to the generally elliptical longitudinal end of the conductor pattern.
  • the magnet is placed at the bottom of the bowl-shaped frame. Since the frame is a yoke, the magnetic flux other than the magnetic flux that effectively acts on the diaphragm is induced from the magnet. That is, generation of useless and harmful magnetic flux is suppressed.
  • the conventional Gamuzon speaker used a thin film for the diaphragm, it was vulnerable to changes in air pressure, and it was difficult to faithfully reproduce the low temperature range.
  • the diaphragm is formed of a flexible printed board, and a certain degree of rigidity is ensured. Furthermore, by forming the openings 2p and 16p in front of the punching grill 2 and the frame 16 forming the housing, it is difficult to receive a change in the pressure inside the housing.
  • the Gamuzon speaker according to the present embodiment does not have a weak frequency band, it can be adopted in all frequency bands to unify the sound characteristics.
  • the stiffness of the support system can be lowered by supporting the diaphragm 10 with a rubber edge having a relatively thin elasticity and a corrugated cross section.
  • f0 minimum resonance frequency
  • the diaphragm is formed of a compact (relatively small size) flexible printed circuit board and used as a drive unit, it can be thinned, and a flat and thin small speaker can be realized.

Landscapes

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

Abstract

L'invention porte sur un nouveau haut-parleur de type plan. Le haut-parleur de type plan (1) comporte : un diaphragme (10) qui est constitué par une carte de circuits imprimés souple de forme grossièrement elliptique, qui est plus longue dans la direction latérale (direction X) du haut-parleur de type plan lorsque le haut-parleur est installé latéralement; et une pluralité d'aimants (14) qui s'approchent du diaphragme, et qui s'étendent dans la direction latérale (direction X). La pluralité d'aimants (1411-1455) comprennent des aimants en forme de tige à pôle nord et des aimants en forme de tige à pôle sud installés en alternance et grossièrement côte à côte, et génèrent un flux magnétique dans la direction longitudinale (direction +Y ou direction -Y) du haut-parleur de type plan. Un motif conducteur (9) formé sur le diaphragme est un motif conducteur en forme d'enroulement unique formé en spirale, et forme des faisceaux de motif (9F1-9F6, 9B1-9B6) s'étendant une pluralité de fois entre chacun des aimants en forme de tige adjacents. Des courants audio circulent dans la même direction latérale (direction +X ou direction -X) pour chacun des faisceaux de motif. Le diaphragme est actionné par une interaction entre le flux magnétique dans la direction longitudinale (direction +Y ou direction -Y), générée par la pluralité d'aimants, et les courants audio circulant à travers les faisceaux de motif dans la direction latérale (direction +X ou direction -X).
PCT/JP2010/058195 2010-05-14 2010-05-14 Haut-parleur de type plan WO2011142030A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/058195 WO2011142030A1 (fr) 2010-05-14 2010-05-14 Haut-parleur de type plan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/058195 WO2011142030A1 (fr) 2010-05-14 2010-05-14 Haut-parleur de type plan

Publications (1)

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WO2011142030A1 true WO2011142030A1 (fr) 2011-11-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2640093A1 (fr) * 2012-03-14 2013-09-18 Harman International Industries, Incorporated Système de haut-parleur planaire
US8983112B2 (en) 2012-03-14 2015-03-17 Harman International Industries, Incorporated Planar speaker system
CN109862480A (zh) * 2018-12-18 2019-06-07 海菲曼（天津）科技有限公司 一种电声换能器和复合平板扬声器
CN111065022A (zh) * 2020-01-07 2020-04-24 南京幻能电子科技有限公司 一种异步式磁回流结构的平面振膜扬声器
CN111869235A (zh) * 2018-02-06 2020-10-30 金东万 具有多层及双轨道的可动线圈的平板型扬声器

Citations (7)

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Publication number Priority date Publication date Assignee Title
JPS56119391U (fr) * 1980-02-09 1981-09-11
JPS63151297A (ja) * 1986-12-16 1988-06-23 Foster Denki Kk 全面駆動型スピ−カの振動板及びその製造方法
JPH01153794U (fr) * 1988-04-14 1989-10-23
JP2005223807A (ja) * 2004-02-09 2005-08-18 Pioneer Electronic Corp 振動板、その製造方法、および、スピーカ装置
JP2006054917A (ja) * 2002-05-02 2006-02-23 Harman Internatl Industries Inc 動電型プレーナラウドスピーカー
WO2006098243A1 (fr) * 2005-03-14 2006-09-21 Matsushita Electric Industrial Co., Ltd. Haut-parleur
JP2009060571A (ja) * 2007-08-07 2009-03-19 Onkyo Corp スピーカー振動板およびこれを用いた動電型スピーカー

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119391U (fr) * 1980-02-09 1981-09-11
JPS63151297A (ja) * 1986-12-16 1988-06-23 Foster Denki Kk 全面駆動型スピ−カの振動板及びその製造方法
JPH01153794U (fr) * 1988-04-14 1989-10-23
JP2006054917A (ja) * 2002-05-02 2006-02-23 Harman Internatl Industries Inc 動電型プレーナラウドスピーカー
JP2005223807A (ja) * 2004-02-09 2005-08-18 Pioneer Electronic Corp 振動板、その製造方法、および、スピーカ装置
WO2006098243A1 (fr) * 2005-03-14 2006-09-21 Matsushita Electric Industrial Co., Ltd. Haut-parleur
JP2009060571A (ja) * 2007-08-07 2009-03-19 Onkyo Corp スピーカー振動板およびこれを用いた動電型スピーカー

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2640093A1 (fr) * 2012-03-14 2013-09-18 Harman International Industries, Incorporated Système de haut-parleur planaire
US8948441B2 (en) 2012-03-14 2015-02-03 Harman International Industries, Inc. Planar speaker system
US8983112B2 (en) 2012-03-14 2015-03-17 Harman International Industries, Incorporated Planar speaker system
CN111869235A (zh) * 2018-02-06 2020-10-30 金东万 具有多层及双轨道的可动线圈的平板型扬声器
CN109862480A (zh) * 2018-12-18 2019-06-07 海菲曼（天津）科技有限公司 一种电声换能器和复合平板扬声器
CN109862480B (zh) * 2018-12-18 2020-06-23 海菲曼（天津）科技有限公司 一种电声换能器和复合平板扬声器
CN111065022A (zh) * 2020-01-07 2020-04-24 南京幻能电子科技有限公司 一种异步式磁回流结构的平面振膜扬声器

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