WO2009122573A1 - Dispositif de haut-parleur - Google Patents

Dispositif de haut-parleur Download PDF

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Publication number
WO2009122573A1
WO2009122573A1 PCT/JP2008/056547 JP2008056547W WO2009122573A1 WO 2009122573 A1 WO2009122573 A1 WO 2009122573A1 JP 2008056547 W JP2008056547 W JP 2008056547W WO 2009122573 A1 WO2009122573 A1 WO 2009122573A1
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WO
WIPO (PCT)
Prior art keywords
inner peripheral
diaphragm
speaker device
support
magnetic circuit
Prior art date
Application number
PCT/JP2008/056547
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English (en)
Japanese (ja)
Inventor
雄一 笠原
Original Assignee
パイオニア株式会社
東北パイオニア株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社, 東北パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2008/056547 priority Critical patent/WO2009122573A1/fr
Publication of WO2009122573A1 publication Critical patent/WO2009122573A1/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
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to a speaker device.
  • a speaker device having a dome-shaped diaphragm is known.
  • a typical dome-type speaker device only the outer periphery of the diaphragm is supported by the frame so that it can vibrate freely through the edges.
  • vibration propagated from the voice coil overlaps near the center of the diaphragm and resonates.
  • unnecessary vibration such as reverse resonance (divided vibration) occurs and the acoustic characteristics deteriorate.
  • a speaker device that has a structure in which an inner peripheral portion of a dome-shaped diaphragm is supported by a support portion and reduces the unnecessary vibration is known (for example, see Patent Document 1).
  • the inner peripheral portion of the dome-shaped diaphragm has a structure that is supported by a support portion through a sponge damper so as to be freely vibrated.
  • the sound quality may be low only by providing a damper.
  • the present invention is an example of a problem to deal with such a problem. That is, in a speaker device having a dome-shaped diaphragm, reducing unnecessary vibration of the diaphragm, reducing unnecessary peak dip in acoustic characteristics, and providing a speaker device with high-quality reproduction sound, etc. Is the object of the present invention.
  • the present invention includes at least a configuration according to the following independent claims.
  • the speaker device includes a frame, a vibrating body supported by the frame, a magnetic circuit, and a support column disposed on the magnetic circuit and extending in a sound radiation direction.
  • the vibrating body includes a vibrating plate, a voice coil fixed to the vibrating plate and loosely fitted in a magnetic gap of the magnetic circuit, and an inner peripheral support portion, and the vibrating plate includes an outer peripheral portion of the vibrating plate.
  • the inner peripheral portion of the diaphragm is disposed between the support column and the inner peripheral portion, and the annular inner peripheral portion having a radial cross-sectional shape formed into a flat plate shape. It is characterized in that it is supported by the support column through a support portion so as to be able to vibrate.
  • FIG. 2 is an exploded cross-sectional view of the speaker device shown in FIG. 1. It is a figure for demonstrating the diaphragm and inner peripheral support part of the speaker apparatus shown in FIG. (A) is a diaphragm and a plan view viewed from the acoustic radiation direction side, and (B) is a cross-sectional view of the diaphragm and the inner periphery support portion shown in (A). It is a figure for demonstrating the principal part of the speaker apparatus shown in FIG. (A) is the cross-sectional perspective view which expanded the principal part vicinity, such as a diaphragm of the speaker apparatus shown in FIG.
  • (B) is the whole perspective view of the support
  • a speaker device includes a frame, a vibrating body supported by the frame, a magnetic circuit, and a support column that is disposed on the magnetic circuit and extends in the acoustic radiation direction.
  • the vibration body includes a vibration plate, a voice coil fixed to the vibration plate and loosely fitted in the magnetic gap of the magnetic circuit, and an inner peripheral support portion that supports the inner peripheral portion of the vibration plate.
  • the outer peripheral portion of the diaphragm is connected to the frame so as to vibrate, the inner peripheral portion of the diaphragm is disposed between the support column and the inner peripheral portion, and the radial cross-sectional shape is formed into a flat plate shape. It is characterized in that it is supported by the support column through a ring-shaped inner peripheral support part so as to be capable of vibrating.
  • the outer peripheral portion of the diaphragm is supported by the frame so as to be able to vibrate, and the inner peripheral portion is supported by the column via the annular inner peripheral support portion having a radial cross-sectional shape formed into a flat plate shape. Therefore, unnecessary vibrations such as resonance and reverse resonance (divided vibration) are relatively small.
  • a peak dip may occur in the midrange of acoustic characteristics due to an extra length portion of the roll shape, etc. is there.
  • the radial cross-sectional shape of the inner peripheral support portion is formed in a flat plate shape, and there is no extra length portion described above. Specifically, since the length of the inner peripheral support portion along the radial direction is relatively short, unnecessary peak dip in the acoustic characteristics is reduced, and flat acoustic characteristics can be obtained from the low sound range to the high sound range. That is, it is possible to provide a speaker device with high-quality reproduced sound.
  • FIG. 1 is a cross-sectional view of a speaker device according to an embodiment of the present invention.
  • 2 is an exploded cross-sectional view of the speaker device shown in FIG.
  • FIG. 3 is a diagram for explaining the diaphragm and the inner peripheral support portion of the speaker device shown in FIG. 1, and in detail, FIG. 3A is a diaphragm and a plan view viewed from the acoustic radiation direction side.
  • FIG. 3B is a cross-sectional view of the diaphragm and the inner periphery support portion shown in FIG.
  • FIG. 4 is a diagram for explaining a main part of the speaker device shown in FIG. Specifically, FIG.
  • FIG. 4 (A) is a cross-sectional perspective view enlarging the vicinity of the main part of the diaphragm, column, equalizer, etc. of the speaker device shown in FIG. 1, and FIG. 4 (B) is shown in FIG. 4 (A).
  • FIG. FIG. 5 is a cross-sectional view taken along a direction orthogonal to the longitudinal direction of the central portion of the column of the speaker device shown in FIG.
  • the speaker device 1 can be employed in a speaker device such as a high-pitched speaker device (so-called tweeter), a small speaker device, an in-vehicle speaker device, or the like.
  • a speaker device 1 includes a magnetic circuit 2, a vibrating body 3, a support column 4 (diaphragm center support portion), an equalizer 5, a frame 6, and a protection member.
  • the vibrating body 3 includes a diaphragm 31 (dome-shaped diaphragm), a voice coil 32, a voice coil bobbin 33, an outer peripheral edge (outer peripheral support section) 34, and an inner peripheral edge (inner peripheral support section) 35.
  • the magnetic circuit 2 corresponds to an embodiment of a magnetic circuit according to the present invention
  • the vibrating body 3 corresponds to an embodiment of a diaphragm according to the present invention
  • the column 4 corresponds to an embodiment of the column according to the present invention
  • the frame 6 corresponds to an embodiment of the frame according to the present invention.
  • the equalizer 5 corresponds to an embodiment of the equalizer according to the present invention.
  • the dome-shaped diaphragm 31 corresponds to an embodiment of the diaphragm according to the present invention, and the inner peripheral edge 35 corresponds to an embodiment of the inner peripheral support portion according to the present invention.
  • Magnetic circuit 2 As the magnetic circuit 2, for example, an inner magnet type magnetic circuit, an outer magnet type magnetic circuit, or the like can be adopted.
  • the magnetic circuit according to the present embodiment employs an internal magnet type magnetic circuit.
  • the magnetic circuit 2 includes a magnetic gap 2G in which the voice coil 32 is loosely fitted.
  • the magnetic circuit 2 is formed in a prescribed shape such as a rectangular shape, a circular shape, or an elliptical shape.
  • the magnetic circuit 2 according to the present embodiment is formed in a circular shape.
  • the magnetic circuit 2 is supported by a frame 6 as shown in FIG.
  • the magnetic circuit 2 includes a yoke 21, a magnet 22, a plate 23, and a short ring (annular metal member) 25.
  • a sound absorbing member 24 is disposed on the plate 23 of the magnetic circuit 2 according to the present embodiment.
  • a short ring 25 is disposed in the magnetic gap 2G.
  • the yoke 21 has a substantially U-shaped cross section.
  • the yoke 21 is formed with a cylindrical portion that is bent and extended in the acoustic radiation direction from the edge of the flat bottom surface portion.
  • the yoke 21 is made of a known material such as iron or an alloy. Further, the yoke 21 has a hole at the center of the bottom surface.
  • the magnet 22 is a permanent magnet including a prescribed material such as neodymium, samarium / cobalt, ferrite, or alnico. As shown in FIG. 1, the magnet 22 is provided on the yoke 21.
  • the magnet 22 according to the present embodiment has an annular shape in which a hole is formed at the center while being formed in a flat plate shape.
  • the plate 23 is made of a specified material such as iron or an alloy, for example, and is provided on the magnet 22 as shown in FIG.
  • the plate 23 according to the present embodiment is formed in a flat plate shape and has an annular shape in which a hole is formed at the center.
  • the short ring 25 is provided to make the magnetic flux density distribution of the magnetic gap 2G of the magnetic circuit 2 substantially uniform.
  • the short ring 25 is formed of, for example, a metal material such as copper, a low saturation magnetic flux density material, or the like. As shown in FIG. 1, the short ring 25 according to the present embodiment is formed in an annular shape with copper, and is provided in the vicinity of the magnetic gap 2 ⁇ / b> G of the yoke 21. Further, the short ring 25 can reduce harmonic distortion.
  • a sound absorbing member 24 is provided on the plate 23 of the magnetic circuit 2 according to the present embodiment. Specifically, the sound absorbing member 24 is provided on the magnetic circuit 2 on the side opposite to the acoustic radiation direction in the inner peripheral support portion 35. The sound absorbing member 24 reduces unnecessary sound in the space 91 surrounded by the diaphragm 31 and the magnetic circuit 2.
  • the sound absorbing member 24 is made of a known material such as a resin member such as low-foam urethane, artificial leather, cloth, or non-woven fabric.
  • the vibrating body 3 As shown in FIG. 1, the vibrating body 3 is supported by a frame 6 so as to freely vibrate. Specifically, the vibrating body 3 includes a diaphragm 31 (dome-shaped diaphragm), a voice coil 32, a voice coil bobbin 33, an outer peripheral side edge (outer peripheral support part) 34, and an inner peripheral side edge (inner peripheral support part) 35.
  • a diaphragm 31 dome-shaped diaphragm
  • a voice coil 32 a voice coil bobbin 33
  • an outer peripheral side edge outer peripheral support part
  • an inner peripheral side edge (inner peripheral support part) 35 have.
  • the diaphragm 31 is formed in a prescribed shape such as a dome shape, a flat plate shape, or a cone shape, for example.
  • the diaphragm 31 according to the present embodiment is formed in a dome shape, and more specifically, the inner peripheral portion 31 ⁇ / b> A has a shape positioned on the acoustic radiation direction (SD) side from the outer peripheral portion 31 ⁇ / b> B.
  • the vibration surface 31 between the inner peripheral portion 31A and the outer peripheral portion 31B is formed in a curved surface shape (a radial cross-sectional shape is a convex shape).
  • a metal material is preferably used as a hard dome material.
  • a known diaphragm material such as titanium, magnesium, or aluminum can be employed.
  • the material for forming the diaphragm 31 is not limited to the above form, and for example, a ceramic material, a soft dome material, paper, resin, cloth, or the like may be employed.
  • the diaphragm 31 has an outer peripheral portion 31B coupled to the frame 6 so as to vibrate, and an inner peripheral portion 31A is formed between the support column 4 and the inner peripheral portion 31A. It is supported by the support column 4 through a ring-shaped inner peripheral edge 35 which is arranged between them and whose radial cross-sectional shape is formed in a flat plate shape.
  • the diaphragm 31 is provided with a cylindrical voice coil support portion (voice coil bobbin) 33 for supporting the voice coil 32 in the vicinity of the outer peripheral portion.
  • the voice coil 32 is supported by the voice coil bobbin 33.
  • the voice coil 32 is provided on the diaphragm 31 via the voice coil bobbin 33.
  • the present invention is not limited to this configuration, and the voice coil 32 may be directly fixed to the diaphragm 31.
  • the voice coil 32 is loosely fitted in the magnetic gap 2G of the magnetic circuit 2 as shown in FIG.
  • the outer peripheral side edge (outer peripheral support part) 34 is provided between the outer peripheral part 31B of the diaphragm 31 and the frame 6 as shown in FIGS. Further, the outer peripheral edge 34 is formed in, for example, a ring shape, and the radial cross-sectional shape is formed in a prescribed shape such as a convex shape, a U shape, or a wave shape.
  • the outer peripheral edge 34 may be made by applying a fine coating on cloth, rubber, uretenfoam, leather, or the like. Moreover, as the outer peripheral side edge 34, you may use what applied the damping agent to these materials.
  • the diaphragm 31 according to the present embodiment is supported by the frame 6 through the outer peripheral edge 34 so as to freely vibrate. As shown in FIGS. 1 and 2, an annular intermediate member (packing) 36 may be provided between the outer peripheral edge 34 and the frame 6.
  • the inner peripheral edge (inner peripheral support portion) 35 supports the inner peripheral portion 31A of the diaphragm 31 as shown in FIGS. Specifically, the inner peripheral edge 35 is disposed between the support column 4 and the inner peripheral portion 31 ⁇ / b> A of the diaphragm 31. Further, the inner peripheral edge 35 is formed in a ring shape in which the radial cross-sectional shape is formed in a flat plate shape. That is, the vibration plate 31 is supported by the support column 4 through the inner peripheral edge 35 so as to freely vibrate. The inner peripheral edge 35 is formed to be deformable with respect to the vibration of the diaphragm. The inner peripheral edge 35 is preferably formed of a material having a larger internal loss than the diaphragm 31.
  • the inner peripheral edge 35 employs a fiber material coated with rubber. Moreover, as the outer peripheral side edge 34, you may use what applied the damping agent to these materials.
  • the inner peripheral edge 35 may be formed of the same material as the outer peripheral edge 34. In this case, the inner peripheral edge 35 can be manufactured at a relatively low manufacturing cost. Thus, by providing the inner peripheral edge 35 formed of a material having a relatively large internal loss, unnecessary vibrations such as resonance and reverse resonance can be reduced.
  • the inner peripheral edge 35 is orthogonal to the vibration direction of the voice coil 32 between the inner peripheral portion 31 A of the diaphragm 31 and the support column 4. It has the radial direction cross-section flat plate-shaped part 354 extended along the direction.
  • the inner peripheral edge 35 has a relatively small vibration range.
  • the vibration range of the inner peripheral edge 35 is relatively small, the overall height of the speaker device 1 can be relatively small.
  • the inner peripheral edge 35 includes an outer peripheral portion 351, a connecting portion 352, a bent portion 353, a radial cross-sectional flat plate-shaped portion 354, a joint portion 355, and It has an inner periphery 356.
  • the outer peripheral portion 351 has an outer diameter larger than the inner diameter of the center hole portion 311 of the diaphragm 31.
  • the connecting portion 352 is formed in a cross-sectional shape corresponding to the radial cross-sectional shape of the vibration plate 31 from the bent portion 353 to the outer peripheral portion 351, and is connected to the inner peripheral portion 31 ⁇ / b> A of the central hole portion of the vibration plate 31.
  • the bent portion 353 is formed at the edge of the radial cross-section flat plate-shaped portion 354.
  • the bent portion 353 according to the present embodiment is formed so as to be positioned on the inner diameter of the center hole portion 311 of the diaphragm 31. Since the inner peripheral edge 35 is joined to the diaphragm 31 by the bent portion 353, the inner peripheral edge 35 can be extended in a direction substantially perpendicular to the vibration direction of the diaphragm 31. Further, since the inner peripheral edge 35 has the bent portion 353, the inner peripheral portion of the diaphragm 31 can be provided in the vicinity of the support column 4, and a relatively large effective vibration area can be obtained.
  • the radial cross-section flat plate-shaped portion 354 is formed between the joint portion 355 and the bent portion 353 and extends along a direction orthogonal to the vibration direction of the voice coil 32 (the same direction as the acoustic radiation direction SD).
  • the radial cross-sectional shape is formed into a flat plate shape.
  • the joint portion 355 is formed on the inner peripheral portion 356 of the inner peripheral edge 35 and is joined to the support column 4.
  • the inner peripheral portion 356 is formed to have an inner diameter smaller than or substantially the same as the outer diameter of the support column 4.
  • the support column 4 (diaphragm center support portion) is disposed on the magnetic circuit and is directed toward the acoustic radiation direction (SD). It is extended.
  • the support column 4 is supported by constituent members that constitute the magnetic circuit 4.
  • the support column 4 is provided on the plate 23 of the magnetic circuit 2.
  • pillar 4 is formed with well-known materials, such as resin, for example.
  • the support column 4 includes a column part 41, a flat step part 42, a leg part 43, a flange 45, and a protrusion part (upper fitting).
  • the column 4 includes a column portion 41, a flat step portion 42, a leg portion 43, a flange 45, a protrusion (upper fitting portion) 47, a lower fitting portion 48, and the like, which are integrally formed of resin. .
  • the column part 41 is formed in the outer diameter larger than the internal diameter of an inner peripheral support part.
  • the flat step portion 42 is formed between the column portion 41 and the projection portion 47, and is formed in a flat shape along a direction orthogonal to the axial direction of the support column 4.
  • the inner peripheral edge 35 is connected to the flat step portion 42 in a state where the inner peripheral portion of the inner peripheral edge 35 is fitted to the protrusion 47 of the support column 4.
  • the leg portion 43 is formed on the magnetic circuit side of the column portion 41, and a vertical hole 401 and a horizontal hole 402 are formed. Yes.
  • the leg portion 43 has a plurality of leg portions, specifically, four leg portions 43A, 43B, 43C, and 43D. These leg portions 43A, 43B, 43C, and 43D are joined to the column portion 41 at the top.
  • the flange 45 is formed to have an outer diameter larger than the outer diameter of the column portion 41 and the leg portion 42, and the lower fitting portion 48 of the support column 4 is fitted to the central hole portion 230 of the plate 23, and is attached to the plate 23. It is fixed with an adhesive or the like.
  • the protruding portion (upper fitting portion) 47 is formed at the tip end portion (acoustic radiation side end portion) of the column portion 4 and is formed to have an outer diameter smaller than or substantially the same as the inner diameter of the inner peripheral edge 35. It is formed in a shape protruding in the acoustic radiation direction from the peripheral part.
  • the protrusion 5 is provided with the equalizer 5.
  • the lower fitting portion 48 is a joint portion to the magnetic circuit 2 and is fitted into the central hole portion 230 of the plate 23 of the magnetic circuit 2 in this embodiment.
  • the column 4 has a vertical hole (first hole) 401 formed along the axial direction of the column 4.
  • the support column 4 is formed along a direction orthogonal to the axial direction of the support column 4, and has a horizontal hole (second hole portion) 402 communicating with the vertical hole (first hole portion) 401.
  • a plurality of lateral holes 402 according to the present embodiment are formed in the leg portion 43.
  • the vertical hole 401 is formed in the vertical hole 401A formed in the column part 41 and the leg part 43 and has a diameter larger than that of the vertical hole 401A as shown in FIGS. 4A and 4B, for example.
  • a vertical hole 401B is formed in the vertical hole 401A formed in the column part 41 and the leg part 43 and has a diameter larger than that of the vertical hole 401A as shown in FIGS. 4A and 4B, for example.
  • a vertical hole 401B is formed in the vertical hole 401A formed in the column part 41 and the leg part 43 and has a diameter larger than that of
  • the vertical hole 401 and the horizontal hole 402 of the support column 4 are provided for reducing a change in internal pressure of the space 91 surrounded by the diaphragm 31 and the magnetic circuit 2, radiating heat, venting a passage 900 to the back chamber, and the like. ing.
  • the equalizer 5 As shown in FIGS. 1, 2, 4 (A), 4 (B), the equalizer 5 is provided at the acoustic radiation side end of the support column 4, and is radiated from the diaphragm 4 in accordance with its shape. Disturbances in sound pressure frequency characteristics of sound waves. Further, the equalizer 5 can obtain a desired directivity characteristic of the sound wave emitted from the diaphragm according to the shape thereof. Further, the equalizer 5 is disposed on the acoustic radiation side (SD) of the diaphragm 31, and at least the radial cross-section flat plate-shaped portion 354 of the inner peripheral edge 35 is formed with a gap between the inner peripheral edge 35 and the specified interval 501. It is formed in a covering shape.
  • SD acoustic radiation side
  • the equalizer 5 is formed in a substantially conical shape, and the outer peripheral portion of the equalizer 5 is formed to have a larger diameter than the radial cross-section flat plate-shaped portion 354 of the inner peripheral edge 35. Desired acoustic characteristics can be obtained by appropriately setting the diameter, size, gap size, and the like of the equalizer 5.
  • the equalizer 5 when the speaker is driven, unnecessary vibration such as resonance and reverse resonance is reduced by the inner peripheral edge 35. Further, since the equalizer 5 is provided, even if the inner peripheral edge 35 is reversely resonated at a specific frequency due to the gap of the specified interval 501 between the bottom of the equalizer 5 and the inner peripheral edge 35, the inner peripheral side The sound wave emitted from the edge 35 is phase-inverted and overlapped with the sound wave of the diaphragm 31 to obtain flat acoustic characteristics. In addition, since the equalizer 5 is provided, it is possible to prevent unnecessary sound waves emitted from the inner peripheral edge 35 from being emitted toward the user.
  • the equalizer 5 has a fitting portion 52 that fits the protruding portion 47 of the support column 4 on the opposite side to the acoustic radiation side. Is formed. Further, the inner peripheral edge 35 is connected to the flat stepped portion 42 by fitting the inner peripheral portion to the protruding portion 47 of the column 4, and the fitting portion 52 of the equalizer 5 and the protruding portion 47 of the column 4 are connected to each other. In the fitted state, it is held between the flat step portion 42 of the support column 4 and the joint portion 53 of the equalizer 5. For this reason, the support
  • the inner peripheral portion of the inner peripheral edge 35 is fitted to the projection 47 of the support column 4 and connected to the flat step portion 42, and then the fitting portion 52 of the equalizer 5 and the projection 47 of the support column 4. And the speaker device according to the present invention can be easily manufactured.
  • the frame 6 is made of a known material such as metal or resin and supports the magnetic circuit 2 and the vibrating body 3. As shown in FIGS. 1 and 2, the frame 6 according to the present embodiment includes a first frame (innermost frame) 61, a second frame (intermediate member) 62, and a third frame (outermost frame) 63). .
  • the first frame (innermost frame) 61 is formed in a U-shaped cross section and includes a magnetic circuit 2 inside as shown in FIGS. As shown in FIGS. 1 and 2, the upper end of the first frame 61 and the first frame 61 are formed so that a space (first space) 92 is formed between the first frame 61 and the yoke 21 of the magnetic circuit 2.
  • An annular second frame (intermediate member) 62 is provided between the upper end of the yoke 21 of the magnetic circuit 2.
  • the first frame 61 may be provided with holes 611 and 612 as necessary.
  • the vent holes 611 and 612 function as vent holes to the outside of the frame.
  • a space (second space) 91 surrounded by the diaphragm 31 and the magnetic circuit 2 and a space (first space) 92 surrounded by the yoke 21 and the frame 61 include the support column 4.
  • a vent passage 900 is formed that communicates with each other through the vertical hole 401, the horizontal hole 402, and the hole 201 formed in the magnetic circuit 2. Since the speaker device 1 according to the present embodiment includes the air passage 900, the space (first space) 92 can be used as a back chamber, and the acoustic characteristics in the low sound range are good.
  • the annular second frame (intermediate member) 62 is provided between the first frame 61 and the magnetic circuit. As shown in FIGS. The outer peripheral portion of the diaphragm 31 is connected through an intermediate member (packing) 36 so as to freely vibrate.
  • the third frame (outermost frame) 63 is formed in a substantially cylindrical shape, and is provided on the outer peripheral side in the radial direction from the first frame 61 and the second frame 62.
  • a protection member 7 is provided on the third frame 63.
  • the protection member 7 is provided on the acoustic radiation side of the diaphragm 31 and protects the diaphragm 31, the equalizer 5, and the like.
  • the protection member 7 includes a porous metal member 71 and a decoration portion 72.
  • the porous metal member 71 is formed of, for example, a porous metal plate, and the outer peripheral end is fixed to the third frame 63 of the frame 6. It is provided on the third frame 63 of the frame 6 on the outer side in the radial direction from the decorative portion 72 and the porous metal member 71.
  • the speaker device 1 for example, when an audio signal is input to the voice coil 32 via a terminal portion (not shown) provided in the frame 6, Lorentz force acts on the voice coil 32 according to the audio signal, The voice coil 32 vibrates by the force. The vibration of the voice coil 32 is transmitted from the outer peripheral portion of the diaphragm 31 to the central portion.
  • a hole is formed in the central portion of the diaphragm 31, and the inner portion is formed in the hole. Since the diaphragm 31 is supported by the support column 4 via the peripheral edge 35, unnecessary vibrations such as resonance and reverse resonance of the diaphragm can be reduced. Further, by providing the inner peripheral edge 35 formed of a material having a relatively large internal loss, unnecessary vibration can be reduced.
  • the radial cross-sectional shape of the inner peripheral edge 35 is formed in a flat plate shape.
  • the extra length is longer than the inner peripheral edge having a roll-shaped cross-sectional shape.
  • unnecessary peak dip in the acoustic characteristics is reduced, and flat acoustic characteristics are obtained from the low range to the high range. Obtainable. That is, it is possible to provide a speaker device with high-quality reproduced sound.
  • the frequency peak of reverse resonance can be set to a higher frequency side, and the acoustic characteristics can be made flat.
  • FIG. 6 is a diagram for explaining the sound pressure frequency characteristics of the speaker device according to the embodiment of the present invention.
  • the vertical axis represents SPL (Sound Pressure Level: unit dB (decibel)), and the horizontal axis represents frequency (unit Hz).
  • the solid line (EQ) indicates the sound pressure frequency characteristic of the speaker device 1 according to the embodiment of the present invention shown in FIG. 1, and the dotted line (NOEQ) indicates the speaker device when the equalizer 5 is not provided.
  • the sound pressure frequency characteristics are shown.
  • a peak occurs in the vicinity of about 15 kHz.
  • the peak is reduced and flat acoustic characteristics are obtained, so that a relatively high quality reproduced sound can be obtained.
  • the inner peripheral edge 35 reversely resonates at a specific frequency due to the gap of the specified interval 501 between the bottom of the equalizer 5 and the inner peripheral edge 35.
  • the sound wave emitted from the inner peripheral edge 35 is phase-inverted, and the sound quality is improved due to the superposition with the sound wave of the diaphragm 31.
  • the speaker device 1 is disposed on the frame 6, the vibrating body 3 supported by the frame 6, the magnetic circuit 2, and the magnetic circuit 2, and toward the acoustic radiation direction.
  • the vibrating body 3 includes a diaphragm 31, a voice coil 32 that is fixed to the diaphragm 31 and loosely fitted in the magnetic gap 2 G of the magnetic circuit 2, and the diaphragm 31.
  • the support 4 is supported between the support column 4 and the support column 4 through a ring-shaped inner periphery support portion (inner periphery side edge 35) which is disposed between the support column 4 and the inner periphery portion and whose radial cross-sectional shape is a flat plate shape. Therefore, unnecessary vibrations of the diaphragm can be reduced.
  • the diaphragm 31 is supported by the outer peripheral edge 34 and the inner peripheral edge 35 having a cross-sectional flat plate shape so as to freely vibrate, unnecessary vibration of the diaphragm can be reduced, and a relatively high sound quality can be achieved. Can be played. Moreover, an unnecessary peak dip in acoustic characteristics can be reduced, and a high-quality reproduced sound speaker device can be provided.

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

Abstract

La présente invention concerne un dispositif de haut-parleur comprenant une membrane en forme de dôme, qui permet de reproduire un son de haute qualité en réduisant les vibrations inutiles de la membrane et en réduisant des crêtes/creux inutiles dans les caractéristiques acoustiques. Le dispositif de haut-parleur (1) comprend un boîtier (6), un corps vibratoire (3) et un circuit magnétique (2) qui sont tous les deux supportés par le boîtier (6), et une colonne de support (4) disposée au-dessus du circuit magnétique (2) et qui s'étend dans une direction de radiation acoustique. Le corps de vibration (3) abrite la membrane (31), une bobine acoustique (32) fixée à la membrane (31) et montée sans serrage dans l'entrefer magnétique (2G) du circuit magnétique (2), et une section de support de périphérie interne (bord latéral de périphérie interne (35)) qui supporte la section de périphérie interne de la membrane (31). La périphérie externe de la membrane (31) est connectée de façon vibratile au boîtier (6), et la périphérie interne de la membrane (31) est supportée de façon vibratile par la colonne de support (4) via la section de support de périphérie interne annulaire (bord latéral de périphérie interne (35)) qui est disposée entre la colonne de support (4) et la section de périphérie interne et présente une section transversale dans le sens radial de la forme d'une plaque plate.
PCT/JP2008/056547 2008-04-02 2008-04-02 Dispositif de haut-parleur WO2009122573A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113545103A (zh) * 2019-03-13 2021-10-22 株式会社电装电子 发声器及其制造方法

Citations (6)

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JPS617194U (ja) * 1984-06-20 1986-01-17 オンキヨー株式会社 ド−ム型スピ−カ−
JPS63224593A (ja) * 1987-03-13 1988-09-19 Matsushita Electric Ind Co Ltd 動電型スピ−カ
JPH0528198U (ja) * 1991-03-11 1993-04-09 オンキヨー株式会社 薄形ドーム型スピーカ
JPH06153292A (ja) * 1992-11-12 1994-05-31 Showa Kogyo Kk スピーカーのエッジ材料及びスピーカー用フリーエッジコーン
JPH099390A (ja) * 1995-06-16 1997-01-10 Phl Audio 高周波数スピーカ
JP2007325075A (ja) * 2006-06-02 2007-12-13 Pioneer Electronic Corp スピーカー装置及びその製造方法

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Publication number Priority date Publication date Assignee Title
JPS617194U (ja) * 1984-06-20 1986-01-17 オンキヨー株式会社 ド−ム型スピ−カ−
JPS63224593A (ja) * 1987-03-13 1988-09-19 Matsushita Electric Ind Co Ltd 動電型スピ−カ
JPH0528198U (ja) * 1991-03-11 1993-04-09 オンキヨー株式会社 薄形ドーム型スピーカ
JPH06153292A (ja) * 1992-11-12 1994-05-31 Showa Kogyo Kk スピーカーのエッジ材料及びスピーカー用フリーエッジコーン
JPH099390A (ja) * 1995-06-16 1997-01-10 Phl Audio 高周波数スピーカ
JP2007325075A (ja) * 2006-06-02 2007-12-13 Pioneer Electronic Corp スピーカー装置及びその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113545103A (zh) * 2019-03-13 2021-10-22 株式会社电装电子 发声器及其制造方法

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