WO2010122605A1 - Convertisseur électromagnétique - Google Patents

Convertisseur électromagnétique Download PDF

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Publication number
WO2010122605A1
WO2010122605A1 PCT/JP2009/001871 JP2009001871W WO2010122605A1 WO 2010122605 A1 WO2010122605 A1 WO 2010122605A1 JP 2009001871 W JP2009001871 W JP 2009001871W WO 2010122605 A1 WO2010122605 A1 WO 2010122605A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
electromagnetic transducer
coil pattern
plate
view
Prior art date
Application number
PCT/JP2009/001871
Other languages
English (en)
Japanese (ja)
Inventor
吉田俊治
Original Assignee
三菱電機エンジニアリング株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機エンジニアリング株式会社 filed Critical 三菱電機エンジニアリング株式会社
Priority to JP2010517103A priority Critical patent/JP4553984B1/ja
Priority to KR1020107028523A priority patent/KR101057842B1/ko
Priority to CN200980122488.2A priority patent/CN102067629B/zh
Priority to PCT/JP2009/001871 priority patent/WO2010122605A1/fr
Publication of WO2010122605A1 publication Critical patent/WO2010122605A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/025—Diaphragms comprising polymeric materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/027—Diaphragms comprising metallic materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
    • 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
    • H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone
    • 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
    • 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
    • H04R9/048—Construction in which the windings of the moving coil lay in the same plane of the ribbon type

Definitions

  • the present invention relates to an electromagnetic transducer that reproduces sound from an audio signal by combining a permanent magnet and a diaphragm.
  • Some conventional electromagnetic transducers in which a permanent magnet and a diaphragm are combined are arranged such that the permanent magnet and the diaphragm are opposed to each other, and a buffer material is arranged between the permanent magnet and the diaphragm. These permanent magnets, diaphragms, and cushioning materials are covered so as to be sandwiched between members such as a frame, and are attached to a speaker housing, for example.
  • the permanent magnet of this type of electromagnetic transducer has strip-shaped magnet portions (also referred to as multipolar magnetization patterns) alternately arranged at different polarities at regular intervals.
  • the diaphragm has a meandering coil pattern disposed at a position facing a gap at a boundary between different magnetic poles of the permanent magnet, that is, a portion called a neutral zone of the magnetic field.
  • the serpentine coil pattern and the multi-pole magnetized pattern of the permanent magnet act electromagnetically, and the diaphragm vibrates according to Fleming's law. Due to this vibration, ambient air vibrates and a sound wave is generated.
  • the generated sound wave is radiated to the outside of the electromagnetic transducer through a permanent magnet and a sound radiation hole formed in the frame, and audio reproduction is performed (for example, refer to Patent Document 1).
  • Gum-Zone type having a configuration similar to that of the above-described electromagnetic transducer and configured with a rod-shaped magnet instead of the above-described permanent magnet.
  • this Gamson type speaker bar magnets adjacent to each other at predetermined intervals are alternately arranged with different polarities, and the poles of the opposing bar magnets are arranged to be the same (N pole and N pole, or S pole and S pole). Is sandwiched in the center from the front and back.
  • the other members are composed of the same members as the above electromagnetic transducer.
  • Such a thin speaker has a diaphragm in which a coil pattern is disposed by etching on a diaphragm member obtained by depositing or bonding a foil of a metal conductor such as copper or aluminum on a base material made of polyester, polyimide, or the like (for example, refer nonpatent literature 1).
  • This thin speaker also performs audio reproduction with the same sound wave generation operation as the electromagnetic transducer.
  • the above-described conventional electromagnetic transducer uses a flat diaphragm made of a thin and flexible polymer film.
  • the diaphragm resonates when the diaphragm vibrates.
  • the present invention has been made to solve the above-described problems, and an object thereof is to provide an electromagnetic transducer with good performance in which abnormal noise is suppressed.
  • the electromagnetic transducer includes a pair of frames that form the inside of a cavity when combined, a permanent magnet that is disposed inside the frame and is provided with a plate that concentrates magnetic flux, and a magnetic flux that is concentrated by the plate. And a diaphragm having a coil pattern formed thereon, and the diaphragm has a uniform thickness and is formed in a three-dimensional structure having an uneven shape.
  • the electromagnetic transducer when the diaphragm is formed in a three-dimensional structure having a uniform thickness and an uneven shape, the rigidity of the diaphragm itself can be improved, and the low frequency range is reproduced. Even when the diaphragm vibrates, resonance of the diaphragm is unlikely to occur, and generation of abnormal noise can be suppressed. In addition, since the resonance of the diaphragm is suppressed, the performance can be improved.
  • FIGS. 1A and 1B show an external appearance of the electromagnetic transducer according to the first embodiment
  • FIG. 1A is an external front view
  • FIGS. 1B and 1C are external side views
  • FIG. 2 is a cross-sectional view showing the configuration of the electromagnetic transducer according to the first embodiment
  • FIG. 2 (a) is a cross-sectional view taken along the line AA of FIG. 1 (a)
  • FIG. 2 (b) is a cross-sectional view of FIG. It is a BB sectional view
  • 3 is an external perspective view of a diaphragm according to Embodiment 1.
  • FIG. FIG. 6 is a perspective view illustrating an appearance of another diaphragm of the electromagnetic transducer according to the first embodiment.
  • FIG. 6 is a perspective view illustrating an appearance of another diaphragm of the electromagnetic transducer according to the first embodiment.
  • FIG. 6 is a perspective view illustrating an appearance of another diaphragm of the electromagnetic transducer according to the first embodiment.
  • FIG. 6 is a perspective view illustrating an appearance of another diaphragm of the electromagnetic transducer according to the first embodiment.
  • 8A and 8B show the external appearance of an electromagnetic transducer according to a second embodiment, in which FIG. 8A is an external front view, FIGS. 8B and 8C are external side views, and FIG. 8D is an external rear view. It is.
  • FIG. 9A is a cross-sectional view showing a configuration of an electromagnetic transducer according to a second embodiment, in which FIG.
  • FIG. 9A is a cross-sectional view taken along the line CC of FIG. 8A, and FIG. It is D line sectional drawing.
  • 6 is an external perspective view of a diaphragm according to Embodiment 2.
  • FIG. 6 is an external perspective view of another diaphragm of the electromagnetic transducer according to Embodiment 2.
  • FIG. 6 is an external perspective view of another diaphragm of the electromagnetic transducer according to Embodiment 2.
  • FIG. 6 is an external perspective view of another diaphragm of the electromagnetic transducer according to Embodiment 2.
  • FIG. 6 is an external perspective view of another diaphragm of the electromagnetic transducer according to Embodiment 2.
  • FIG. 1A and 1B show the external appearance of an electromagnetic transducer 10 according to Embodiment 1 of the present invention.
  • FIG. 1A is a front view showing the external appearance of the electromagnetic transducer 10
  • FIG. 1C is a side view showing the appearance of the electromagnetic transducer 10
  • FIG. 1C is a side view showing the appearance of the electromagnetic transducer 10 viewed from the short side
  • FIG. 1D is a rear view showing the appearance of the electromagnetic transducer 10.
  • the electromagnetic transducer 10 has sound radiation holes 15a formed on a frame 15 at regular intervals, on both sides.
  • the frame 15 is configured by combining an upper frame 16 and a lower frame 17.
  • the upper frame 16 and the lower frame 17 are distinguished from each other in the upper and lower directions, but as shown in FIGS. 1 (a) to 1 (d), the upper frame 16 and the lower frame 17
  • the shape may be substantially the same, and the structure which turned upside down may be sufficient.
  • FIG. 2 is a cross-sectional view showing the configuration of the electromagnetic transducer 10 according to Embodiment 1 of the present invention.
  • FIG. 2 (a) is a cross-sectional view taken along the line AA shown in FIG. 1 (a).
  • 1 is a cross-sectional view of an electromagnetic transducer 10.
  • the electromagnetic transducer 10 includes a frame 15, a diaphragm 21, a diaphragm support member 24, an upper permanent magnet 32, a lower permanent magnet 33, and a plate 38.
  • the frame 15 has a housing structure that forms an interior of a cavity when the upper frame 16 and the lower frame 17 are combined.
  • the diaphragm 21 is made of a thin polymer film of several tens to several hundreds of microns, and the vibration film 21a having a substantially uniform thickness has a three-dimensional structure with an uneven shape.
  • the coil pattern 21b made of an electric conductor is formed on the surface of the vibration film 21a.
  • the coil pattern 21b is formed by punching a copper or aluminum electric conductor foil by etching or pressing, and is bonded to the surface of the vibration film 21a.
  • a diaphragm support member 24 is attached to the short end of the diaphragm 21 and the inner wall surface of the lower frame 17, and the diaphragm 21 can vibrate to the lower frame 17 via the diaphragm support member 24. It is supported by.
  • permanent magnets 32 and 33 are disposed on the inner wall surfaces of the upper frame 16 and the lower frame 17 facing each other.
  • the permanent magnet 32 is attached to the inner wall surface of the upper frame 16, and the permanent magnet 33 is attached to the inner wall surface of the lower frame 17, and is permanently located at the position of the lower frame 17 facing the permanent magnet 32.
  • the magnet 33 is not arranged.
  • the permanent magnet 32 is not arranged at the position of the upper frame 16 facing the permanent magnet 33. Accordingly, the permanent magnets 32 and 33 are alternately attached to the opposing inner wall surfaces of the upper frame 16 and the lower frame 17 in a staggered arrangement.
  • the magnetic poles of the permanent magnet 32 have N poles on the surface fixed to the upper frame 16 and S poles on the surface facing the surface fixed on the upper frame 16.
  • the surface fixed to the lower frame 17 is the S pole
  • the surface opposite to the surface fixed to the lower frame 17 is the N pole. Therefore, the permanent magnets 32 and 33 are magnetized in the same magnetic pole direction.
  • the surface facing the surface fixed to the upper frame 16 of the permanent magnet 32 and the surface facing the surface fixed to the lower frame 17 of the permanent magnet 33 are The plate 38 is placed, and the plates 38 are arranged in a straight line with a certain interval in the horizontal direction.
  • the plate 38 is made of a magnetic material such as an iron plate, and functions as a yoke that concentrates the magnetic flux of the permanent magnets 32 and 33 on the plates 38 adjacent in the horizontal direction.
  • the diaphragm 21 a of the diaphragm 21 is formed between the permanent magnet 33 and the frame 15, between the plate 38 and the upper frame 16, and between the plate 38 and the lower frame 17. It is formed in a concavo-convex shape so as to pass between and between the plates 38, and the rising and falling portions of the concavo-convex shape are formed to be substantially vertical.
  • the coil pattern 21 b is formed between the frame 15 and the plate 38 and between the plates 38. With this configuration, the coil pattern 21b is arranged at a position where the magnetic force is concentrated by the plate 38 as a yoke.
  • FIG. 2B is a cross-sectional view of the electromagnetic transducer 10 taken along the line BB shown in FIG.
  • a diaphragm support member 24 is attached between the longitudinal end portion of the diaphragm 21 and the lower frame 17. Further, as described above, the diaphragm support member 24 is also attached to the short end portion of the diaphragm 21. Therefore, the diaphragm support member 24 is attached between the outer peripheral end of the diaphragm 21 and the lower frame 17, and the diaphragm 21 can vibrate to the lower frame 17 via the diaphragm support member 24. It is supported.
  • FIG. 3 is a perspective view of the outer appearance of the diaphragm 21 according to the first embodiment as viewed obliquely.
  • the diaphragm 21 has a vibration film 21 a having a three-dimensional structure with an uneven shape.
  • a coil pattern 21b made of an electric conductor is formed in a meandering shape on the surface of the vibration film 21a. Both ends of the coil pattern 21b are connected to the outside so that an audio signal from a control unit (not shown) is supplied to the coil pattern 21b.
  • a flange-like overlapping portion 21 c is formed on the outer peripheral portion of the diaphragm 21, and the overlapping portion 21 c forms the vibrating membrane 21 a in a hook-like shape so as to make an overlapping thickness.
  • the strength of the outer peripheral portion of the diaphragm 21 is improved.
  • the operation principle of the electromagnetic transducer 10 will be described.
  • a magnetic field is generated with a high magnetic flux density between the plates 38 placed on the permanent magnets 32 and 33.
  • a current as an audio signal is supplied to the coil pattern 21b on the diaphragm 21 from the outside, the magnetic flux between the plates 38 and the current flowing in the coil pattern 21b act, thereby causing the plates 38 on the permanent magnets 32 and 33 to operate.
  • the coil pattern 21b of the diaphragm 21 are electromagnetically coupled, and a driving force is generated in the coil pattern 21b in accordance with Fleming's law.
  • the diaphragm 21 vibrates, and the air in the frame 15 vibrates due to the vibration of the diaphragm 21.
  • the vibration of the air in the frame 15 is radiated to the outside from the sound radiation hole 15a as audio vibration.
  • the diaphragm 21 is formed in a three-dimensional structure having an uneven shape by a diaphragm 21 a made of a thin film having a substantially uniform thickness, so that the diaphragm itself is compared with a conventional plate-shaped diaphragm.
  • the rigidity is improved.
  • the rigidity of the outer peripheral portion of the diaphragm 21 is improved by forming an overlapping portion 21c in which the diaphragm 21a is formed in a bowl shape on the outer peripheral portion of the diaphragm 21 and overlapped. Yes.
  • FIG. 4 is a perspective view showing the appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the first embodiment, and a reinforcing coil pattern 21d is formed instead of the overlapping portion 21c of FIG.
  • the reinforcing coil pattern 21d is formed between the coil patterns 21b of the diaphragm 21, that is, in the longitudinal direction of the convex surface of the diaphragm 21 and in the short direction substantially perpendicular to the longitudinal direction.
  • the coil pattern 21b is electrically Also formed separately.
  • FIG. 5 is a perspective view showing an external appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the first embodiment, and a reinforcing rib 21e is formed instead of the reinforcing coil pattern 21d of FIG.
  • the reinforcing rib 21e forms a groove shape between the coil patterns 21b on the surface of the diaphragm 21, that is, in the short direction of the convex upper surface of the diaphragm 21.
  • FIG. 6 is a perspective view showing the appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the first embodiment, and a reinforcing plate 21f is provided in place of the overlapping portion 21c in FIG.
  • the reinforcing plate 21f is made of a material that is equal to or smaller in specific gravity than the material of the diaphragm 21, and is provided so as to connect adjacent longitudinal ends of the convex shape of the diaphragm 21, and the convex shape of the diaphragm 21 is It is reinforced.
  • FIG. 7 is a perspective view showing an appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the first embodiment, and a reinforcing plate 21g is provided instead of the reinforcing plate 21f of FIG.
  • the reinforcing plate 21g is made of a material having the same or smaller specific gravity as the material of the diaphragm 21, and is provided on the convex inner wall surface or the convex outer wall surface of the diaphragm 21, and reinforces the convex shape of the diaphragm 21. is doing.
  • the reinforcing plate 21g is provided along the inner wall surface of the diaphragm 21, the permanent magnets 32 and 33 and the plate 38 are divided or notched, and the diaphragm 21 vibrates. Further, the reinforcing plate 21g does not come into contact with the plate 38 or the permanent magnets 32 and 33.
  • the vibration plate 21 is formed into a three-dimensional structure having an uneven shape by the vibration film 21a made of a thin film having a substantially uniform thickness, and the plate 38 is also formed. Since the coil pattern 21b receiving the concentrated magnetic flux is formed on the diaphragm, the rigidity of the diaphragm 21 itself can be improved, and the diaphragm 21 can vibrate even when reproducing the low frequency range. When this is done, resonance of the diaphragm 21 is unlikely to occur, and the effect that generation of abnormal noise can be suppressed is obtained. Moreover, since the resonance of the diaphragm 21 is suppressed, there is an effect that the performance is improved.
  • the outer peripheral portion of the diaphragm 21 is formed on the outer peripheral portion of the diaphragm 21 by forming the overlapping portion 21c in which the diaphragm 21a is formed in a bowl shape and overlapped. This improves the rigidity of the diaphragm 21 and prevents the vibration plate 21 from being deformed.
  • the rigidity of the diaphragm 21 is increased by forming the reinforcing coil pattern 21d electrically separated from the coil pattern 21b on the convex surface of the diaphragm 21.
  • the diaphragm 21 is not deformed, and an effect that the generation of abnormal noise can be suppressed is obtained.
  • the rigidity of the diaphragm 21 is improved by forming the groove-shaped reinforcing rib 21e between the coil patterns 21b on the surface of the diaphragm 21, that is, on the convex upper surface.
  • the diaphragm 21 is not deformed, and an effect that the generation of abnormal noise can be suppressed is obtained.
  • the convex shape of the diaphragm 21 is reinforced by the reinforcing plates 21f and 21g made of a material that is the same as or smaller in the specific gravity of the diaphragm 21. Therefore, the vibration 21 is not deformed and the generation of abnormal noise can be suppressed.
  • the magnetic gap between the permanent magnets 32 and 33 can be narrowed, and the magnetic flux density of the magnetic circuit can be increased.
  • Embodiment 2 FIG. In the first embodiment, a configuration in which a plurality of permanent magnets 32 and 33 are provided has been described. In the second embodiment, a configuration for reducing the size of the electromagnetic transducer 10 will be described with reference to FIGS. 8 to 13. . In addition, in order to avoid duplication of description, the same code
  • FIG. 8A and 8B show the external appearance of the electromagnetic transducer 10 according to the second embodiment of the present invention.
  • FIG. 8A is a front view showing the external appearance of the electromagnetic transducer 10
  • FIG. 8C is a side view showing the external appearance of the electromagnetic transducer 10
  • FIG. 8C is a side view showing the external appearance of the electromagnetic transducer 10 viewed from the short side
  • FIG. 8D is a rear view showing the external appearance of the electromagnetic transducer 10.
  • the upper frame 16 has a sound radiation hole 15b that is larger than the sound radiation hole 15a at the center of the upper frame 16 together with the sound radiation hole 15a.
  • the size is substantially the same as the convex shape of the diaphragm 21.
  • the upper frame 16 has a flat plate shape and is configured to cover one surface of the lower frame 17 to form the interior of the cavity.
  • the diaphragm 21 is exposed to the outside through the 16 sound radiation holes 15b.
  • the lower frame 17 has a sound radiation hole 15a, but no sound radiation hole 15b.
  • FIG. 9 is a cross-sectional view showing the configuration of the electromagnetic transducer 10 according to the second embodiment of the present invention.
  • FIG. 9 (a) is a cross-sectional view taken along the line CC shown in FIG. 8 (a).
  • 1 is a cross-sectional view of an electromagnetic transducer 10.
  • the upper frame 16 has a sound radiating hole 15b formed in the center, and the sound radiating hole 15a is formed at a predetermined interval from the sound radiating hole 15b.
  • the permanent magnet 33 is disposed and fixed at the center of the inner wall surface of the lower frame 17 facing the upper frame 16, and the lower frame 17 of the permanent magnet 33 is fixed.
  • a plate 38 serving as a yoke is placed on the surface opposite to the surface. The plate 38 is arranged in a straight line in the horizontal direction of the upper frame 16, and generates a magnetic field having a high magnetic flux density between the plate 38 and the upper frame 16.
  • the vibrating membrane 21a is formed in a convex shape passing through the position between the permanent magnet 33 and the lower frame 17, between the plate 38 and the upper frame 16, and the position facing the plate 38.
  • the coil pattern 21 b is formed between the plate 38 and the upper frame 16.
  • FIG. 9B is a cross-sectional view of the electromagnetic transducer 10 when cut along the line DD shown in FIG. As shown in FIG. 9B, the convex upper surface of the diaphragm 21 protrudes from the sound radiation hole 15b of the upper frame 16 and is exposed.
  • FIG. 10 is a perspective view of the diaphragm 21 according to the second embodiment as viewed from an oblique direction.
  • the diaphragm 21 is formed in a three-dimensional structure having an uneven shape by a diaphragm 21 a made of a thin film having a substantially uniform thickness, and a coil pattern 21 b that receives magnetic flux concentrated by a plate 38 is formed.
  • the rigidity of the diaphragm itself is improved as compared with the conventional flat diaphragm.
  • the outer peripheral portion of the diaphragm 21 is formed with an overlapping portion 21 c in which the diaphragm 21 a is formed in a bowl shape and overlapped, thereby improving the rigidity of the outer peripheral portion of the diaphragm 21. Yes.
  • FIG. 11 is a perspective view illustrating an appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the second embodiment, and a reinforcing coil pattern is formed on the convex surface of the diaphragm 21 instead of the overlapping portion 21c of FIG. 21d is formed.
  • FIG. 12 is a perspective view showing an external appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the second embodiment, and a reinforcing rib 21e is formed instead of the reinforcing coil pattern 21d of FIG.
  • the reinforcing ribs 21e are formed in a groove shape between the coil patterns 21b on the surface of the diaphragm 21, that is, in the short direction of the convex upper surface.
  • FIG. 13 is a perspective view showing the appearance of another diaphragm 21 of the electromagnetic transducer 10 according to the second embodiment, and a reinforcing plate 21g is provided instead of the overlapping portion 21c of FIG.
  • the reinforcing plate 21g is provided on the convex inner wall surface of the diaphragm 21, and reinforces the convex shape of the diaphragm 21.
  • the same effect as that of the electromagnetic converter 10 of the first embodiment can be obtained, and the size of the electromagnetic converter 10 can be reduced. Is obtained.
  • the meandering coil pattern 21b is formed on the surface of the diaphragm 11.
  • the coil pattern 21b is configured on both surfaces of the vibration film 21a. Also good.
  • the structure by which the coil pattern 21b was embedded in the diaphragm 21 may be sufficient.
  • the example in which the permanent magnets 12 and 13 have three rows and one row has been shown.
  • other numbers of rows may be used, and the same effect can be obtained by configuring the diaphragm 21 in the same manner. Is obtained.
  • a reinforcing coil pattern 21d is provided on the diaphragm 21a
  • a groove-shaped reinforcing rib 21e is formed on the diaphragm 21a, and the same or specific gravity as the components of the diaphragm 21 on the outer periphery or inside of the diaphragm 11
  • the reinforcing plates 21f and 21g made of a small material are provided has been described, they may be used alone, in a plurality, or in combination, and similar effects can be obtained.
  • the upper frame 16 and the lower frame 17 are distinguished from each other in the upper and lower directions, but a configuration in which the upper and lower sides are inverted may be used.
  • the electromagnetic transducer according to the present invention can improve the rigidity of the diaphragm itself, and even when the low frequency range is reproduced, resonance of the diaphragm occurs when the diaphragm vibrates. It is difficult to suppress the generation of abnormal noise and can improve the performance by suppressing the resonance of the diaphragm, so that it is suitable for use in a speaker of an audio system.

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

Abstract

Selon l'invention, on forme une section interne creuse lorsqu'on combine une paire d'armatures (16, 17), et une plaque (38) concentrant un flux magnétique est disposée sur des aimants permanents (32, 33) disposés à l'intérieur de la paire d'armatures (16, 17). Dans une membrane (21), on forme sur le film vibrant (21a) une configuration de bobine (21b) qui reçoit le flux magnétique de la plaque (38), et le film vibrant (21a) ayant une épaisseur uniforme est formé sur une structure solide irrégulière.
PCT/JP2009/001871 2009-04-23 2009-04-23 Convertisseur électromagnétique WO2010122605A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2010517103A JP4553984B1 (ja) 2009-04-23 2009-04-23 電磁変換器
KR1020107028523A KR101057842B1 (ko) 2009-04-23 2009-04-23 전자 변환기
CN200980122488.2A CN102067629B (zh) 2009-04-23 2009-04-23 电磁转换器
PCT/JP2009/001871 WO2010122605A1 (fr) 2009-04-23 2009-04-23 Convertisseur électromagnétique

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Application Number Priority Date Filing Date Title
PCT/JP2009/001871 WO2010122605A1 (fr) 2009-04-23 2009-04-23 Convertisseur électromagnétique

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WO2010122605A1 true WO2010122605A1 (fr) 2010-10-28

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KR (1) KR101057842B1 (fr)
CN (1) CN102067629B (fr)
WO (1) WO2010122605A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3166335A4 (fr) * 2014-07-02 2018-02-28 Clarion Co., Ltd. Dispositif de haut-parleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5328691B2 (ja) 2010-02-22 2013-10-30 三菱電機エンジニアリング株式会社 電磁変換器

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JPH11192627A (ja) * 1997-12-30 1999-07-21 Beishin Kogyo Kk 発泡でヒケを防止した合成樹脂成形品とその成形方法
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CN102067629B (zh) 2014-02-12
JPWO2010122605A1 (ja) 2012-10-22

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